JP2014002183A - Camera, accessory and program - Google Patents

Abstract

A highly convenient camera without malfunction.
In a camera, a terminal portion (connecting portion) is provided with a plurality of terminals (each terminal from Tp1 to Tp12) connected to an accessory, and the plurality of terminals include a terminal Tp10 (terminal Tp10). 1st terminal) is included. The camera control unit 170 identifies the type of accessory according to the signal state of the terminal Tp10 (first terminal). As a result, the camera 10 can identify the type of accessory, and can perform control according to the type of accessory, thereby providing a highly convenient camera without malfunction.
[Selection] Figure 7

Description

  The present invention relates to a camera, an accessory, and a program.

  The camera may be used with accessories such as a flash device (for example, see Patent Document 1). The accessory is used by being connected to an accessory shoe (also called a shoe seat, a hot shoe or the like) of the camera. The accessory shoe has a terminal for outputting a control signal for controlling the accessory to the accessory. The camera can control the accessory by transmitting a control signal to the accessory via the terminal of the accessory shoe.

US Patent Application Publication No. 2010/033292

  In a camera system including a camera and accessories, it is expected that there is no malfunction. For example, if the user does not respond to the operation or the response is slow, the system becomes unusable. The present invention has been made in view of the above circumstances, and an object thereof is to provide a camera, an accessory, and a program that have no malfunction and are highly convenient.

  The camera according to the first aspect of the present invention is a camera to which an accessory is connected, wherein a plurality of terminals connected to the accessory are provided, and the plurality of terminals includes a first terminal. And a camera control unit for identifying the type of the accessory according to the signal state of the first terminal.

  The accessory of the 2nd aspect of this invention is an accessory connected to the camera as described in a 1st aspect, Comprising: The 1st connection provided with the 1st connection terminal connected to the said 1st terminal of the said camera And a first setting unit for supplying a signal indicating the type of accessory to the first connection terminal.

  The program of the 3rd mode of the present invention is according to the signal state of the 1st terminal among a plurality of terminals provided in the connecting part to which the accessory is connected to the computer with which the camera to which the accessory is connected is provided. Then, the step of identifying the type of the accessory connected to the connection unit is executed.

According to the present invention, it is possible to provide a camera, an accessory, and a program that are highly convenient and have no malfunction.

It is a figure which shows the external appearance of the camera system in the standard function example of 1st Embodiment. It is the figure which looked at the camera system in the standard function example of this embodiment from the opposite side to FIG. It is a figure which shows the external appearance of the accessory shoe of this embodiment. It is a figure which shows the accessory shoe of this embodiment. It is a figure which shows the external appearance of the connector of this embodiment. It is a block diagram which shows the function structure of the camera system in the standard function example of this embodiment. It is a figure which shows the structure of the accessory in the example of a standard function of this embodiment, and the connection relationship between an accessory and a camera. (A) is a figure which shows typically the connection relation of a starting detection level and a camera control part, (B) is a figure which shows the structure of a level switching part typically. It is a figure which shows the external appearance of the camera system 1 in the function expansion example 1 of this embodiment. It is the top view which looked at the shoe seat 15B from the Z-axis direction. It is a block diagram which shows the structure of the accessory (conversion apparatus 700 and accessory 400B) in the function expansion example 1, and the connection of a camera and an accessory. It is a figure which shows the external appearance of the camera system 1 in the function expansion example 2 of this embodiment. It is a block diagram which shows the structure of the accessory (display apparatus) in the function expansion example 2, and the connection of a camera and an accessory. It is a figure which shows the procedure of the process in the camera system of this embodiment. It is a figure which shows the procedure of the process in the communication preparation sequence of this embodiment. It is a figure which shows the procedure of the process in the communication preparation sequence of 2nd Embodiment.

(First embodiment)
A first embodiment of the present invention will be described. In the following description, the same components are denoted by the same reference numerals, and the description thereof may be simplified or omitted.

[About the configuration that does not extend the function in the camera system that can expand the function]
FIG. 1 is a diagram illustrating an appearance of a camera system 1 according to the present embodiment. FIG. 2 is a view of the camera system 1 of the present embodiment as viewed from the opposite side to FIG.

A camera system 1 shown in FIGS. 1 and 2 includes a camera 10 (camera body 100 and photographing lens 200) and an accessory 400. The accessory 400 according to the present embodiment has a light emitting function and can illuminate a subject. The camera 10 can communicate with the accessory 400 and control the accessory 400. For example, the camera system 1 can capture an image of the subject with the camera 10 while illuminating the subject with the accessory 400.
In the present embodiment, a range of functions that can be processed by the camera system 1 is set by a combination of devices configured as the camera system 1. For example, the case where the camera system 1 is configured by the camera 10 (camera body 100 and photographing lens 200) and the accessory 400 as described above is defined as a configuration of “standard function”. On the other hand, instead of the accessory 400, a case where another accessory is included in the configuration is defined as a configuration of “extended function”. The “standard function” does not include a function defined as an “extended function” in which the function that can be implemented is expanded from the standard function. Thus, the camera system 1 has a limited range of processing that can be performed according to the type of accessory.

  As shown in FIG. 1, the camera 10 includes a camera body 100 and a photographing lens (interchangeable lens) 200. The camera body 100 includes a lens mount 11 to which a photographing lens 200 can be attached. The photographing lens 200 includes a lens side mount (not shown) for mounting with the camera body 100. The taking lens 200 can be attached to and detached from the lens mount 11 via the lens side mount. The camera body 100 includes a top surface (upper surface) 13 disposed at an upper portion of a side surface facing the front surface 12 on which the lens mount 11 is disposed, and a rear surface 14 disposed on the side opposite to the front surface 12. And have.

  The camera body 100 includes a release button 16, an accessory shoe (hereinafter referred to as a shoe seat 15), and a power switch 31 that are disposed on the top surface 13. The camera 10 detects that the release button 16 has been pressed, and performs various processes such as an imaging process. The shoe seat 15 is configured so that the accessory 400 can be attached thereto. The power switch 31 is a switch for switching the camera body 100 between an on state and an off state.

  In the present embodiment, the XYZ orthogonal coordinate system shown in FIG. In this XYZ orthogonal coordinate system, the Y-axis direction is a direction substantially parallel to the optical axis of the taking lens 200. In this XYZ orthogonal coordinate system, the X-axis direction and the Z-axis direction are directions orthogonal to the Y-axis direction and orthogonal to each other. The front surface 12 and the back surface 14 are each substantially orthogonal to the Y-axis direction. The top surface 13 is substantially orthogonal to the Z-axis direction.

  The accessory 400 includes an accessory main body 410, a connector 420, and a light emitting unit 425. The light emitting unit 425 includes a flash light emitting unit 430 and an illumination light emitting unit 435 each having an emission surface for emitting light. The accessory main body 410 accommodates the illumination light emitting unit 435 and various electrical components. The connector 420 is provided below the accessory body 410. The connector 420 can be attached to and detached from the shoe seat 15 of the camera body 100. The accessory 400 is attached to the camera body 100 and fixed to the camera body 100 by attaching the connector 420 to the shoe seat 15. The flash light emitting unit 430 is provided on the side opposite to the connector 420 (upward) with respect to the accessory body 410. When the accessory 400 is attached to the camera body 100 and the exit surface of the flash light emitting unit 430 faces the front 12 side (+ Y direction side) of the camera body 100, the flash light emitting unit 430 takes a picture. Flash illumination light (flash emission from the Xe tube) can be emitted in a direction substantially parallel to the optical axis of the lens 200. The flash light emitting unit 430 is provided so that the direction (posture) of the exit surface can be changed (posture change) with respect to the accessory body 410. For example, it is possible to emit flash illumination light with the emission surface of the flash light emitting unit 430 directed upward (+ Z side) of the accessory body 410. On the other hand, the illumination light emitting unit 435 is directed toward the front surface 12 side (+ Y side) of the camera body 100 (in a direction substantially parallel to the optical axis of the photographing lens 200) with the accessory 400 attached to the camera body 100. Continuous illumination light (for example, LED illumination light) can be emitted.

  As shown in FIG. 2, the camera body 100 includes a display unit 102 disposed on the back surface 14 and a setting switch 104 disposed on the back surface 14. The display unit 102 includes a display element such as a liquid crystal display element or an organic electroluminescence display element. The display unit 102 can display an image to be captured, an image indicating various settings, an image indicating the state of the accessory 400, an image indicating an imaging condition, and the like. The setting switch 104 can accept input from the user for changing various setting items of the camera 10 and the accessory 400. The various setting items include at least one of zoom magnification setting, shooting mode setting, white balance setting, exposure time setting, and display switching setting. The shooting mode setting is, for example, auto mode setting or manual mode setting.

  As shown in FIG. 2, the accessory 400 includes a first pilot lamp 455 (pilot lamp), a second pilot lamp 460 (pilot lamp), a first operation unit 424, and a second operation unit 471. The first pilot lamp 455 emits light according to the operating state of the flash light emitting unit 430 shown in FIG. The second pilot lamp 460 emits light according to the operating state of the illumination light emitting unit 435 shown in FIG. The first operation unit 424 is an operation member operated by the user in order to remove the accessory 400 from the camera body 100 (in other words, the first operation unit 424 is a removal operation member). The second operation unit 471 is an operation member operated by the user in order to switch between the ON state and the OFF state of the entire function of the accessory 400 (in other words, the second operation unit 471 is an ON / OFF operation switch. ).

  FIG. 3 is a view showing an appearance of the shoe seat 15 of the present embodiment. FIG. 4 is a plan view of the shoe seat 15 seen partially from above (in the −Z-axis direction from the top plate portion 22 in FIG. 3).

  The shoe seat 15 includes a bottom plate portion 21, a top plate portion 22, a side plate portion 23 disposed between the bottom plate portion 21 and the top plate portion 22, and an opening 24 disposed between the bottom plate portion 21 and the top plate portion 22. And a terminal portion 25 disposed on the bottom plate portion 21.

  The bottom plate portion 21 is attached to the top surface 13 of the camera body 100 shown in FIG. The bottom plate portion 21 has a mounting hole 26 used for mounting on the top surface 13 of the camera body 100 and a locking hole 27 used for locking the accessory 400. The bottom plate portion 21 is fixed to the top surface 13 of the camera body 100 by screws or the like disposed inside the attachment hole 26. In the present embodiment, the + Z-axis direction may be referred to as “upward”.

  The top plate 22 has a substantially U-shaped planar shape when viewed from above (Z-axis direction). The top plate portion 22 projects inward from the side plate portion 23 when viewed from above (Z-axis direction). The side plate portion 23 has a pair of inner walls extending from the opening 24 in a predetermined direction (Y-axis direction). The pair of inner walls of the side plate portion 23 are arranged to face each other in a direction (X-axis direction) orthogonal to the extending direction (Y-axis direction) of the inner wall.

  The opening 24 is open in the direction intersecting the direction (Z-axis direction) from the bottom plate portion 21 toward the top plate portion 22. The opening 24 is open in a direction substantially parallel to the extending direction (Y-axis direction) of the inner wall of the side plate portion 23. The opening 24 is sized and shaped so that the connector 420 can be inserted.

  The terminal portion 25 has a plurality (12) of terminals indicated by reference characters Tp1 to Tp12 in FIG. The plurality of terminals of the terminal portion 25 each extend in a direction substantially parallel to the extending direction (Y-axis direction) of the inner wall of the side plate portion 23. The plurality of terminals of the terminal portion 25 are arranged side by side in a direction (X-axis direction) orthogonal to the extending direction of the inner wall of the side plate portion 23. The terminals of the terminal portion 25 are arranged in a region partially overlapping (covered) with the top plate portion 22 when viewed from above.

  At least one of the plurality of terminals may be different in length in the Y-axis direction from the other terminals. For example, in the present embodiment, all the 12 terminals indicated by the symbols Tp1 to Tp12 are aligned at the end of the + Y side. On the other hand, the lengths of the three terminals indicated by the symbols Tp1 to Tp3 are longer in the −Y axis direction than the terminals indicated by the symbols Tp4 to Tp12. In other words, in the present embodiment, the three terminals indicated by the symbols Tp1 to Tp3 protrude more to the −Y side than the other terminals. As will be described later, Tp1 to Tp3 are so-called ground terminals. The reason why these ground terminals are made longer than the other terminals will be described later.

  The accessory 400 is attached to the shoe seat 15 by inserting the connector 420 into the opening 24 of the shoe seat 15 and sliding it in a predetermined direction (+ Y-axis direction) (see FIG. 1).

  FIG. 5 is a view showing an appearance of the connector 420 of the present embodiment. The connector 420 includes a bottom portion 421, a movable member (hereinafter referred to as a locking claw 422) that protrudes from the bottom portion 421 toward the outside of the connector 420, and a terminal portion 423 provided on the bottom portion 421.

  The bottom portion 421 contacts the bottom plate portion 21 of the shoe seat 15 in a state where the connector 420 is attached to the shoe seat 15. The locking claw 422 is provided so that it can advance and retreat (move) in a predetermined direction. In the present embodiment, the predetermined direction in which the locking claw 422 advances and retreats is the direction in which the locking claw 422 protrudes from the bottom 421 (Z-axis direction). The locking claw 422 is movable between a position protruding from the bottom 421 and a position accommodated in the accessory 400. The locking claw 422 is biased by a spring or the like so as to be pushed to the side (−Z side) protruding from the bottom 421 to the outside of the connector 420. As the connector 420 is slid and moved when the connector 420 is attached to the shoe seat 15, the locking claw 422 is pushed by the bottom plate portion 21 of the shoe seat 15 (under force) and retracted to the + Z side. It advances into the locking hole 27 at the position where the locking hole 27 is formed. As a result, the locking claw 422 of the connector 420 is locked with the inner peripheral surface of the locking hole 27 of the shoe seat 15, and movement relative to the shoe seat 15 is restricted in the sliding direction (Y-axis direction).

  The connector 420 is disposed between the bottom plate portion 21 and the top plate portion 22 while being inserted into the opening 24, and movement relative to the shoe seat 15 is restricted in a direction from the bottom plate portion 21 toward the top plate portion 22. The connector 420 is disposed between the pair of inner walls of the side plate portion 23 in a state of being inserted into the opening 24, and is connected to the shoe seat 15 in a direction (X-axis direction) from one inner wall to the other inner wall of the side plate portion 23. Movement is restricted.

  The first operation unit 424 (see FIG. 2) is an operation member that can be operated by the user to move the locking claw 422 in a predetermined direction. The first operation unit 424 of the present embodiment is provided on the back side of the accessory body 410. The first operation unit 424 includes a link mechanism that transmits a force received by a user operation to the locking claws 422. The locking claw 422 moves in a predetermined direction (+ Z axis direction in FIG. 5) by a force received from the link mechanism of the first operation unit 424. That is, when the first operating portion 424 is operated with the locking claw 422 being locked in the locking hole 27 shown in FIG. Moving. As a result, the restriction of the position of the accessory 400 with respect to the camera body 100 is released, and the accessory 400 can be detached from the camera body 100.

The terminal portion 423 has a plurality (12) of terminals indicated by reference signs Ts1 to Ts12.
The number of terminals included in the terminal portion 423 is the same as the number of terminals included in the terminal portion 25 of the shoe seat 15. The plurality of terminals included in the terminal portion 423 correspond one-to-one with any of the plurality of terminals included in the terminal portion 25 of the shoe seat 15. The plurality of terminals included in the terminal portion 423 come into contact with the corresponding terminals among the plurality of terminals included in the terminal portion 25 of the shoe seat 15 in a state where the connector 420 is connected to the shoe seat 15. Connected.

  FIG. 6 is a block diagram showing a functional configuration of the camera system of the present embodiment. As shown in FIG. 6, the photographing lens 200 includes an optical system 210, an optical system driving unit 220, and an optical system control unit 230. Light incident on the photographing lens 200 from the subject enters the light receiving surface of the image sensor 121 of the camera body 100 through the optical system 210.

  The optical system 210 includes a plurality of optical components such as a lens and a diaphragm, and a lens barrel that houses the plurality of optical components. The optical system 210 can image light incident from the outside of the camera body 100.

  The optical system driving unit 220 detects an actuator that drives the optical system 210, an encoder that detects the position of the optical component in the optical system 210, and a movement (at least one of a translational movement and a rotational movement) of the optical system 210 due to camera shake or the like. Provide a sensor. The actuator of the optical system drive unit 220 includes, for example, a focusing control motor, a power zoom control motor, a diaphragm aperture control motor, a vibration reduction (VR) control motor, and an expansion / reduction cylinder control motor. Including.

  The optical system drive unit 220 operates the actuator of the optical system drive unit 220 in accordance with a control command from the optical system control unit 230, thereby performing focusing control, zooming control, exposure control, VR control, and expansion / contraction control of the photographing lens 200. It can be carried out. Focusing control is control for adjusting the focal point of the optical system 210 by moving at least one of optical components such as a lens included in the optical system 210 in the optical axis direction by a focusing control motor. The zooming control is a control for changing the imaging angle of view by moving at least one of optical components such as a lens included in the optical system 210 in the optical axis direction by a power zoom control motor. In exposure control, the diaphragm constituting the optical system 210 is driven by a diaphragm aperture control motor to change the aperture size of the diaphragm, thereby adjusting the amount of light incident on the image sensor 121 through the optical system 210. It is control to do. The VR control is a control for correcting image shake due to camera shake by moving at least one of optical components such as a lens included in the optical system 210 in a direction intersecting the optical axis by a VR control motor. The expansion / contraction control is control for extending or contracting the photographic lens 200 in the optical axis direction by driving an expansion / contraction cylinder control motor.

  The optical system drive unit 220 is supplied with electric power from the battery BAT stored in the battery storage unit 110 of the camera body 100. The optical system driving unit 220 is supplied with power from the battery BAT via a terminal disposed on the lens mount 11 of the camera body 100. The actuators, encoders, and sensors that constitute the optical system driving unit 220 are operated by electric power supplied from the battery BAT.

  The optical system control unit 230 can communicate with a camera control unit 170 (described later) of the camera body 100 via a terminal disposed on the lens mount 11 of the camera body 100. The optical system control unit 230 can supply information indicating the detection result of the encoder of the optical system driving unit 220 and information indicating the detection result of the sensor to the camera control unit 170. Information supplied from the optical system control unit 230 to the camera control unit 170 includes lens type information indicating the type of the taking lens 200, lens focal length information, an aperture value set by exposure control, and a subject focus set by focusing control. Includes distance information, power consumption information, etc. The power consumption information indicates the power consumption consumed in the driving state, and is information that changes according to the lens type information and the driven state.

  The accessory 400 includes a flash light emitting unit 430, an illumination light emitting unit 435, an accessory control unit 440, and a nonvolatile memory 445. The illumination light emitting unit 435, the accessory control unit 440, and the nonvolatile memory 445 are accommodated in the accessory main body 410 illustrated in FIGS. 1 and 2, for example. Details of the accessory 400 will be described later.

  The camera body 100 includes a battery storage unit 110, an imaging processing unit 120, a shutter drive unit 130, a display unit control circuit 135, a memory 140, a memory control circuit 145, an input unit 150, an operation detection circuit 155, a storage unit 158, and camera control. Part 170 is provided.

  The battery storage unit 110 can store a battery BAT such as a primary battery or a secondary battery. The battery BAT is mounted on the camera body 100 by being stored in the battery storage unit 110. The battery BAT stored in the battery storage unit 110 can supply power (PWR) necessary for the operation of the components of the camera system 1, for example, the display unit 102, the photographing lens 200, the accessory 400, and the like.

  The imaging processing unit 120 includes an imaging element 121, an imaging element control circuit 122, and an image circuit 123. The image sensor 121 includes a plurality of pixels arranged two-dimensionally. Each pixel of the image sensor 121 includes a light receiving element such as a CCD (Charge Coupled device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. The light receiving element of the imaging element 121 generates a charge corresponding to the amount of light incident on each pixel from the optical system 210. The image sensor 121 converts the charge generated in the light receiving element by the light incident on each pixel into a signal. The image sensor 121 generates an analog image signal corresponding to an image (optical image) formed on the light receiving surface of the image sensor 121 via the optical system 210. The image sensor 121 is connected to each of the image sensor control circuit 122 and the image circuit 123. The image circuit 123 amplifies the image signal output from the image sensor 121 and converts the analog image signal into a digital signal. The image sensor control circuit 122 can control the image sensor 121 to cause the image sensor 121 to generate an image signal corresponding to the image, to output the generated image signal, and the like.

  The shutter driving unit 130 controls opening and closing of a shutter accommodated in the camera body 100. This shutter shields light incident on the light receiving surface of the image sensor 121 through the optical system 210 while the shutter is closed. If the camera body 100 is not equipped with a shutter mechanism for exposure control, the shutter drive unit 130 is also unnecessary.

  The display unit control circuit 135 performs display control such as lighting, brightness adjustment, and extinguishing of the display unit 102, and processing for causing the display unit 102 to display image data output from the camera control unit 170, for example.

  The memory 140 is a storage medium that can be inserted into and removed from the camera body 100, such as a memory card. The memory 140 stores image data generated by the camera control unit 170, for example. The memory control circuit 145 controls input / output of information between the camera control unit 170 and the memory 140. The memory control circuit 145, for example, stores information such as image data generated by the camera control unit 170 in the memory 140 or reads out information such as image data stored in the memory 140 to the camera control unit 170. Perform output processing.

  The input unit 150 includes a setting switch 104 and a release button 16 that can be operated by the user. The operation detection circuit 155 detects a user operation input to the input unit 150. The operation detection circuit 155 generates operation information indicating the user's operation input to the input unit 150, and outputs the generated operation information to the camera control unit 170.

  The storage unit 158 includes a nonvolatile memory 160 and a buffer memory 165. The nonvolatile memory 160 is a program for operating the camera control unit 170, image data generated by imaging, information indicating the state of the apparatus, information indicating power consumption of each load unit of the camera system 1, and input from the user. Information such as various settings, imaging conditions, accessory type information indicating the type of accessories connected to the camera 10, and function extension setting information is stored. The information indicating the state of the apparatus includes voltage information (remaining battery level) of the battery BAT stored in the battery storage unit 110 of the camera body 100, information indicating the control state of each actuator of the photographing lens 200, and the like. Information indicating the power consumption of each load unit of the camera system 1 includes power consumed by the shutter driving unit 130 (necessary for operation), power consumed by the actuator of the photographing lens 200 (necessary for operation), and the accessory 400. Power consumption (necessary for operation). The accessory type information and the function extension setting information include information generated by the camera control unit 170 based on a signal supplied from an accessory that is an external device. The buffer memory 165 is a temporary information storage unit used for the control process of the camera control unit 170. For example, the camera control unit 170 temporarily stores, in the buffer memory 165, an image signal output from the image sensor 121, image data generated according to the image signal, and the like.

  The camera control unit 170 includes a CPU (Central Processing Unit) that controls the operation of the components of the camera body 100 based on a program stored in the non-volatile memory 160 and an electronic component such as an ASIC (Application Specific Integrated Circuit). Prepare. For example, the camera control unit 170 turns on the power to the camera body 100 or controls the drive of the optical system 210 via the optical system drive unit 220 according to the operation information output from the operation detection circuit 155 to the camera control unit 170. Then, drive control of the image sensor 121 via the image sensor control circuit 122, display control of the display unit 102 via the display unit control circuit 135, control of processing on the image signal output to the image circuit 123, and the like are performed.

  The camera control unit 170 includes an image processing unit 171, a display control unit 172, an imaging control unit 173, an operation detection processing unit 174, a power control unit 175, and a communication unit 176.

  The image processing unit 171 performs image processing for generating image data based on the image signal output from the image circuit 123. The image processing unit 171 stores the image data generated by the image processing in the buffer memory 165.

The display control unit 172 reads the image data generated by the image processing unit 171 and stored in the buffer memory 165 at regular time intervals, and causes the display unit 102 to repeatedly display the read image data. Further, the display control unit 172 reads the image data generated by the image processing unit 171 and stored in the buffer memory 165 at regular time intervals, and records the data in the memory 140 as moving image format data (moving image data). Further, the display control unit 172 displays the remaining charge amount of the battery BAT on the display unit 102 according to the determination result of the power control unit 175 described later.
In the present embodiment, the display control unit 172 outputs, to the display device 900, information for repeatedly displaying the read image data on the display unit 980 of the display device 900 at the time of function expansion to be described later.

  The operation detection processing unit 174 determines a user operation detected by the operation detection circuit 155 based on the operation information output from the operation detection circuit 155, and stores the determined information in the buffer memory 165. The operation detection processing unit 174 outputs control commands for various processes corresponding to operations from the user to components (function units) that execute processes corresponding to the operations. For example, when the operation detection circuit 155 detects an input to the input unit 150 requesting execution of an imaging process, the operation detection processing unit 174 outputs the operation information output to the operation detection processing unit 174. Based on this, a control command for requesting execution of the imaging process is output to the imaging control unit 173. In addition, the operation detection processing unit 174 detects that the operation detection circuit 155 detects an input to the input unit 150 that requests execution of an autofocus (AF) process, for example. On the basis of the operation information output to, a control command for requesting execution of AF processing is output. In the AF process, the optical system control unit 230 refers to a distance measurement result using an image detected by the image sensor 121 via the optical system 210 based on the control command output by the operation detection processing unit 174. The focusing control motor of the optical system driving unit 220 is controlled to adjust the focus of the optical system 210 so that, for example, the subject designated by the user is in focus.

  The imaging control unit 173 outputs a control signal for causing the components of the camera system 1 to execute an imaging process to the components of the camera system 1 based on the control command output by the operation detection circuit 155. For example, the imaging control unit 173 executes the following process as a process related to the imaging process. In the imaging process, the imaging control unit 173 performs focusing control, exposure control, zooming control, VR control, and the like of the optical system 210 via the optical system control unit 230 in accordance with imaging conditions input in advance by the user. . In addition, the imaging control unit 173 controls the time during which the shutter is open (exposure time) by controlling the shutter driving unit 130 in the imaging process, so that the light from the optical system 210 is applied to the light receiving surface of the imaging element 121. Irradiate only for the exposure time. In addition, the imaging control unit 173 controls the accessory 400 as necessary, and irradiates light from the accessory 400 in synchronization with the imaging timing.

  The power control unit 175 determines the remaining amount of power in the battery BAT by comparing the result of detecting the power supply voltage output from the battery BAT with a determination threshold. The power control unit 175 collects information indicating the power consumption of each load unit of the camera system 1 and monitors the power consumption of each load unit of the camera system 1.

  The communication unit 176 is communicably connected to a load control unit that controls each load unit inside the camera body 100. The load unit inside the camera body 100 is, for example, the display unit 102, and the load control unit is, for example, the display unit control circuit 135. In addition, the communication unit 176 is connected to an external device arranged outside the camera body 100 in the camera system 1 so as to be able to communicate with a control unit of each external device. The photographing lens 200 of this embodiment is one of external devices, and the optical system control unit 230 is connected to be communicable with the communication unit 176. Moreover, the accessory 400 of this embodiment is one of external devices, and the accessory control part 440 is connected so that communication with the communication part 176 is possible. Other external devices other than the accessory 400 include an illumination device (for example, the accessory 400B (FIG. 11)), a GPS device, and a display device (for example, an electronic viewfinder (EVF) device (display device)) that are different in specification from the accessory 400. 900 (FIG. 13)), projector, etc.), wireless communication device, microphone, accessory shoe conversion device (for example, conversion device 700 (FIG. 11)), and the like. When accessory 400 </ b> B (FIG. 11) is attached to camera body 100 via conversion device 700, accessory control unit 440 </ b> B is communicably connected to communication unit 176. When the display device 900 (FIG. 13) is attached to the camera body 100, the display drive unit 940 (FIG. 13) is connected to be able to communicate with the communication unit 176.

The function expansion processing unit 177 detects the type of accessory connected to the camera body 100 and sets the function according to the detected type of accessory to an operable state.
The camera system 1 has each function set so that the camera control unit 170 functions as a “standard function”. In contrast to this “standard function”, there is an “extended function” that can be operated according to the type of accessory. For example, the “extended function” includes a control function for an external device (for example, the accessory 400B and the conversion device 700) that does not require power supply from the camera body 100, and a display device (for example, the display device 900) provided as an external device. Control functions for the are included. The function expansion processing unit 177 detects the type of accessory from the signal supplied via the terminal unit 25, generates at least one of accessory type information and function expansion information, and stores it in the storage unit 158. For example, the signal supplied via the terminal unit 25 includes a function expansion setting signal Op for notifying information for identifying the type of the accessory 400 described later.
Each unit of the camera control unit 170 determines a range of processing to be executed based on at least one of accessory type information and function expansion information stored in the storage unit 158, and operates a function according to the determination result. Control to be possible.

  FIG. 7 is a diagram illustrating a configuration of the accessory 400 according to the present embodiment and a connection relationship between the accessory 400 and the camera 10 (the camera body 100 and the photographing lens 200 described above).

  First, the camera 10 will be described. The camera 10 includes a load unit 30, a power switch 31, a power supply unit 32, and an accessory power supply control unit 33.

  The load unit 30 includes a load unit of the camera body 100 such as the shutter drive unit 130 and the display unit 102 described above, and a load external to the camera body 100 such as the optical system drive unit 220 and the optical system control unit 230. Part. The load unit 30 includes a heavy load unit with high power consumption and a light load unit with relatively low power consumption than the heavy load unit. The heavy load unit includes a load unit having an actuator, such as the optical system drive unit 220 and the shutter drive unit 130 in the camera body 100, for example. The light load unit includes an optical system control unit 230, an image processing unit 171, each control circuit, a display unit, and the like.

  The power switch 31 is a switch that cuts off the supply of power from the battery BAT to the heavy load portion of the load portion 30.

  The power supply unit 32 stabilizes the output voltage of the battery BAT based on the power supplied from the battery BAT and supplies it to the light load unit of the load unit 30 and the camera control unit 170. The power supply unit 32 includes a voltage detection sensor that detects the output voltage of the battery BAT, and a constant voltage circuit that stabilizes the output voltage of the battery BAT.

  The accessory power supply control unit 33 includes a first terminal, a second terminal, and a control terminal. The accessory power supply control unit 33 is a switch that switches whether or not the first terminal and the second terminal are in a conductive state according to a control signal input to the control terminal. In the description of the present embodiment, when a switch is in a conductive state between its terminals, it is referred to as “closing the circuit”, and when the switch is in a non-conductive state between its terminals as “cutting off the circuit”. Call.

  The terminal part 25 of the camera body 100 can be electrically connected to the terminal part 423 of the accessory 400. The terminal portion 25 includes a plurality of terminals indicated by reference characters Tp1 to Tp12 (see FIG. 4). In the description of the present embodiment, each terminal of the terminal portion 25 of the shoe seat 15 may be distinguished by attaching a number indicating the terminal arrangement order. This number is an ascending order from one side (+ X side) in the terminal arrangement direction (X-axis direction) to the other side (−X side). For example, among the plurality of terminals of the terminal section 25, the terminal arranged on the most + X side is called the first terminal, and the terminal arranged on the most -X side is called the twelfth terminal.

  As shown in FIGS. 4 and 7, each terminal in the terminal portion 25 of the camera body 100 is assigned as follows.

  In the terminal portion 25, an eleventh terminal (hereinafter referred to as a power supply terminal Tp11) and a twelfth terminal (hereinafter referred to as a power supply terminal Tp12) respectively supply power PWR from the battery BAT in the camera body 100 to the accessory 400 side. It is a terminal to supply.

  The first terminal (hereinafter referred to as ground terminal Tp1) and the second terminal (hereinafter referred to as ground terminal Tp2) are ground terminals corresponding to the power supply terminal Tp11 and the power supply terminal Tp12, respectively. The ground terminal Tp1 and the ground terminal Tp2 are terminals whose potential becomes the reference potential of the power PWR. The ground terminal Tp1 and the ground terminal Tp2 are ground terminals for a circuit (heavy load part of the load part 30) in the camera body 100 that uses the power PWR.

  The third terminal (hereinafter referred to as the reference potential terminal Tp3) and the fifth terminal (hereinafter referred to as the reference potential terminal Tp5) are terminals whose potential becomes the reference potential SGND (signal ground) (that is, the signal potential). This is the terminal that serves as a reference potential for sending and receiving). The reference potential terminal Tp3 and the reference potential terminal Tp5 are ground terminals for circuits in the camera body 100 (the camera control unit 170, the power supply unit 32, and the light load unit of the load unit 30).

  The fourth terminal (hereinafter referred to as a synchronization signal terminal Tp4) is a terminal to which a synchronization signal (clock signal) CLK that is a communication clock signal generated on the accessory 400 side is input from the accessory 400.

  The sixth terminal (hereinafter referred to as communication signal terminal Tp6) is also a terminal that outputs a communication signal DATA including camera side data (including various commands) to the accessory 400 side, and vice versa. It is also a terminal to which a communication signal DATA including information (such as unique information and setting information of the accessory 400) is input from the accessory 400 side.

  The seventh terminal (hereinafter referred to as the activation state detection terminal Tp7) is a state in which the connector 420 is attached to the shoe seat 15 and indicates the accessory activation state (in other words, the accessory 400 can be activated and function. This is a terminal for the camera control unit 170 to detect whether or not the accessory 400 side provides the activation detection level (electrical L level) DET (which indicates the activation state (functional enable state)) (see FIG. 9 for details). Will be described later).

  The eighth terminal (hereinafter referred to as a light emission control signal terminal Tp8) sends a light emission control (light emission command) signal X for controlling the light emission of at least one of the flash light emitting unit 430 and the illumination light light emitting unit 435 of the accessory 400 to the accessory 400. Output terminal. The light emission control (light emission command) signal X is a control command that instructs the flash light emission unit 430 or the illumination light emission unit 435 to start light emission.

  The ninth terminal (hereinafter referred to as communication control signal terminal Tp9) is a terminal that outputs a communication control (communication start) signal Cs from the camera 10 to the accessory 400 when communication from the camera 10 to the accessory 400 is started. is there. The communication control signal Cs is a signal that determines the communication start timing of DATA communication between the camera 10 and the accessory 400 via the communication signal terminal Tp6.

The tenth terminal (hereinafter referred to as function expansion setting terminal Tp10) is a terminal to which a function expansion setting signal Op for identifying the type of the accessory 400 is supplied from the accessory 400. This function expansion setting signal Op is a signal for identifying the type of the connected accessory 400, in a nutshell.
In addition, about said 4th terminal, 6th terminal, 8th terminal, and 9th terminal, it may be defined as a terminal which has a function different from the above according to the kind of accessory. For example, a case where the type of accessory is identified as a display device (for example, display device 900). When the accessory type is identified as a display device, the fourth terminal, the sixth terminal, the eighth terminal, and the ninth terminal are defined as follows.
A fourth terminal (hereinafter referred to as a display signal terminal Tp4 ′ instead of the synchronization signal terminal Tp4 in this case) is a terminal for outputting a display signal from the camera 10 to the accessory side. A sixth terminal (hereinafter referred to as a display signal terminal Tp6 ′ instead of the communication signal terminal Tp6 in this case) is a terminal for outputting a display signal from the camera 10 to the accessory side. The signals output from the display signal terminal Tp4 ′ and the display signal terminal Tp6 ′ are a pair of differential signals.
The eighth terminal (hereinafter referred to as the CLK terminal Tp8 ′ instead of the light emission control signal terminal Tp8 in such a case) is a timing signal for sending information to the display driving unit 940 (FIG. 13) of the display device 900. Is output.
The ninth terminal (hereinafter, referred to as DATA terminal Tp9 ′ instead of communication control signal terminal Tp9 in this case) is data used to send information to display drive unit 940 (FIG. 13) of display device 900. Output a signal. Information from the camera 10 is sent to the control circuit of the display device 900 according to each signal output from the CLK terminal Tp8 ′ and the DATA terminal 9 ′, and the display state on the display device 900 is controlled.

  In the above terminal arrangement, the power supply terminal Tp11 and the power supply terminal Tp12 are arranged so as to be biased toward one side (−X side) in the arrangement direction (X-axis direction) of the plurality of terminals of the terminal portion 25. In other words, the power supply terminal Tp11 and the power supply terminal Tp12 are arranged side by side (collectively) in one terminal portion in the 12 terminal arrangement of the terminal portion 25. The ground terminal Tp1 and the ground terminal Tp2 are arranged so as to be biased toward the other side (+ X side) in the arrangement direction (X-axis direction) of the plurality of terminals of the terminal portion 25. In other words, the ground terminal Tp1 and the ground terminal Tp2 are close to the other end (the end opposite to the arrangement side of the power supply terminal Tp11 and the power supply terminal Tp12) in the 12 terminal arrangement of the terminal portion 25 ( They are arranged side by side.

  Further, in the above terminal arrangement, out of the 12 terminals of the terminal section 25, terminals (communication signal terminal Tp6, light emission control signal terminal Tp8, communication control signal terminal Tp9) that output a control signal to the accessory 400, from the accessory 400 Both a terminal to which a control signal is input (synchronization signal terminal Tp4) and a terminal (activation state detection terminal Tp7) for identifying whether the accessory 400 can function are arranged between the power supply terminal Tp11 and the ground terminal Tp2. Has been.

  In the above terminal arrangement, the function expansion setting terminal Tp10 is arranged between the power supply terminal Tp11 and the communication control signal terminal Tp9 in the 12 terminal arrangement of the terminal section 25.

  In the above terminal arrangement, the light emission control signal terminal Tp8 is arranged next to the communication control signal terminal Tp9 on the side opposite to the function expansion setting terminal Tp10. An activation state detection terminal Tp7 is arranged next to the light emission control signal terminal Tp8 on the side opposite to the communication control signal terminal Tp9. That is, the light emission control signal terminal Tp8 is disposed so as to be sandwiched between the activation state detection terminal Tp7 and the communication control signal terminal Tp9.

  In the above terminal arrangement, the communication signal terminal Tp6 is arranged next to the activation state detection terminal Tp7 on the side opposite to the light emission control signal terminal Tp8. That is, the activation state detection terminal Tp7 is disposed so as to be sandwiched between the communication signal terminal Tp6 and the light emission control signal terminal Tp8.

  In the above terminal arrangement, the reference potential terminal Tp5 is arranged next to the communication signal terminal Tp6 on the side opposite to the activation state detection terminal Tp7. That is, the communication signal terminal Tp6 is disposed so as to be sandwiched between the reference potential terminal Tp5 and the activation state detection terminal Tp7.

In the above terminal arrangement, the synchronization signal terminal Tp4 is arranged next to the reference potential terminal Tp5 on the side opposite to the communication signal terminal Tp6. Another reference potential terminal Tp3 is arranged next to the synchronization signal terminal Tp4 on the side opposite to the reference potential terminal Tp5. That is, the synchronization signal terminal Tp4 is disposed so as to be sandwiched between two reference potential terminals (Tp3 and Tp5).
A ground terminal Tp2 is arranged next to the reference potential terminal Tp3 on the side opposite to the synchronization signal terminal Tp4. That is, three GND-related terminals (the reference potential terminal Tp3 and the two ground terminals Tp1 and Tp2) are arranged in the vicinity of one end of the terminal array.

  Details of signals input to the terminals of the terminal unit 25 and signals output from the terminals will be described later.

The camera control unit 170 (function expansion processing unit 177) expands an executable function by changing a restriction condition of processing that can be executed according to information indicating the type of accessory (accessory type information or the like). .
For example, in this embodiment, the process when the accessory 400 is attached to the camera 10 is defined as a process included in the standard function. When an accessory that handles the same control signal as the accessory 400 is attached to the camera 10, the camera control unit 170 communicates with the accessory (accessory 400) via the terminal unit 25 and the terminal unit 423 to access the accessory ( A control signal for controlling the accessory 400) is supplied to the accessory (accessory 400). In this embodiment, the control signal supplied to the accessory (accessory 400) by the camera control unit 170 is, for example, the light emission control signal X for controlling the light emission of the light emitting unit 425 in the accessory 400, the communication signal DATA, and the camera 10 and the accessory 400. Is a communication control signal Cs that determines the communication timing between the two.

Next, the camera control unit 170 will be described as a case of extending the function when the accessory 400B is attached to the camera 10 via the conversion device 700. When the accessory 400B is attached to the camera 10 via the conversion device 700, the camera control unit 170 is connected to the accessory 400B in the same manner as when the accessory 400 is attached to the camera 10 via the terminal portion 25. A control signal for controlling the accessory 400B through communication is supplied to the accessory 400B. In the present embodiment, the control signal supplied from the camera control unit 170 to the accessory 400B is the light emission control signal X for controlling the light emission of the light emitting unit 425 in the accessory 400B, the communication signal DATA, and the communication between the camera 10 and the accessory 400B. It is a communication control signal Cs that determines the timing.
The camera control unit 170 includes a case where the display device 900 is attached to the camera 10 and the function is expanded. When the display device 900 is attached to the camera 10, the camera control unit 170 communicates with the display device 900 via the terminal unit 25 and the terminal unit 423 and transmits a control signal for controlling the display device 900. , Supplied to the display device 900. In the present embodiment, the control signal that the camera control unit 170 supplies to the display device 900 is a display control signal (DATA) that controls the display state of the display unit 980 in the display device 900.

  The camera control unit 170 reads information stored in at least one of the nonvolatile memory 160 and the buffer memory 165 illustrated in FIG. 6 and transmits the read information to the accessory control unit 440. The camera control unit 170 stores the information received from the accessory control unit 440 in at least one of the nonvolatile memory 160 and the buffer memory 165.

  The information stored in the non-volatile memory 160 includes camera initial state information indicating the initial state of the camera 10 and camera setting state information indicating the setting state of the camera. The camera control unit 170 can transmit at least one piece of information included in the camera initial state information or the camera setting state information to the accessory control unit 440.

  The camera initial state information includes information indicating the type of the camera 10, information indicating the type of function the camera 10 has, information indicating the characteristics of each function the camera 10 has, and the like. The information indicating the type of function of the camera 10 is, for example, information indicating whether to perform AE control, information indicating whether to perform AWB control, or the like. The camera setting state information includes setting information indicating whether or not each function of the camera 10 is functioning, information indicating the shooting mode of the camera 10, and the like. The information indicating the shooting mode is, for example, information indicating whether or not the camera 10 is set to a shooting mode for capturing an image as a moving image, and whether or not the camera 10 is set to a shooting mode for capturing an image as a still image. It is information etc. which show. The information indicating that the camera 10 is set to the shooting mode for capturing an image as a still image is information indicating whether the mode is set to single shooting or continuous shooting, for example. The mode for performing single shooting is, for example, a shooting mode for capturing one image each time the release button 16 is pressed. The continuous shooting mode is a shooting mode in which a plurality of images are captured while the release button 16 is pressed.

(Regarding the configuration including the camera 10 and the accessory 400)
Next, the connection relationship of each component in the camera 10 will be described with reference to FIG. The battery BAT in the following description is assumed to be stored in the battery storage unit 110. The positive electrode of the battery BAT is connected to one end of the power switch 31 via the power line 40 (PWR).
The other end of the power switch 31 is connected to the power terminal of the heavy load portion of the load portion 30. The ground terminal of the heavy load part of the load part 30 is connected to the negative electrode of the battery BAT stored in the battery storage part 110 via the ground line 41 (PGND).

  The positive electrode of the battery BAT is connected to the input terminal of the power supply unit 32 via the power supply line 40. The first output terminal of the power supply unit 32 is connected to the power supply terminal of the light load unit of the load unit 30. The ground terminal of the light load part of the load part 30 is connected to the negative electrode of the battery BAT via a ground line 42 (SGND). The second output terminal of the power supply unit 32 is connected to the power supply terminal of the camera control unit 170. The potential of the second output terminal is different from the potential of the first output terminal. The ground terminal of the camera control unit 170 is connected to the negative electrode of the battery BAT via the ground line 42 (SGND).

  The ground terminal Tp1 is connected to the negative electrode of the battery BAT through a ground line 43 (GND). The ground terminal Tp2 is connected to the negative electrode of the battery BAT via the ground line 43 in parallel with the ground terminal Tp1. The reference potential terminal Tp3 is connected to the negative electrode of the battery BAT through the ground line 42. The reference potential terminal Tp5 is connected to the negative electrode of the battery BAT via the ground line 42 in parallel with the reference potential terminal Tp3. Note that the ground of the camera 10 of the present embodiment employs a so-called single point ground (single point ground).

The synchronization signal terminal Tp4, the communication signal terminal Tp6, the activation state detection terminal Tp7, the light emission control signal terminal Tp8, the communication control signal terminal Tp9, and the function expansion setting terminal Tp10 are respectively connected to the camera control unit 170 via signal lines. ing.
A pull-up resistor is provided on the line connected to the communication signal terminal Tp6. This pull-up resistor is electrically connected to the output side of the power supply unit 32. For this reason, the potential (level) at the communication signal terminal Tp6 is maintained at the H level before the accessory 400 is attached and before the communication with the accessory 400 is started. Note that a pull-up resistor is provided on the line connected to the activation state detection terminal Tp7 as well as the communication signal terminal Tp6. This will be described later with reference to FIG. The line connected to the function expansion setting terminal Tp10 is also provided with a pull-up resistor similarly to the communication signal terminal Tp6 and the activation state detection terminal Tp7.

  The power supply terminal Tp11 is connected to the first terminal of the accessory power supply control unit 33. The power supply terminal Tp12 is connected to the first terminal of the accessory power supply control unit 33 in parallel with the power supply terminal Tp11. The second terminal of the accessory power supply control unit 33 is connected to the positive electrode of the battery BAT via the power supply line 40. The accessory power supply control unit 33 can cut off the power supply from the battery BAT to the power supply terminal Tp11 and the power supply terminal Tp12 by a control signal input to the control terminal from the camera control unit 170.

  Next, the configuration on the accessory 400 side will be described with reference to FIG. The accessory 400 according to the present embodiment is operated by the power PWR supplied from the camera 10. The accessory 400 can make each component of the accessory 400 function with the electric power PWR supplied from the camera 10, when the power supply which supplies the electric power consumed in the accessory 400 is not mounted in the accessory 400 side.

  The accessory 400 includes a flash light emission unit 430, an illumination light emission unit 435, an accessory control unit 440, a nonvolatile memory 445, a first power supply unit (power supply unit 1) 450-1, and a second power supply unit (power supply unit 2) 450-2. , A second pilot lamp 460, a first pilot lamp 455, a first switch unit 465, a second switch unit 470, and a function expansion setting unit (EXSW) 485. It is assumed that the accessory 400 cannot contain a battery.

  The flash light emitting unit 430 includes a flash light source 431 and a charging unit 432. The flash light source 431 includes a known flash illumination light source such as a xenon tube.

  The charging unit 432 boosts the voltage supplied from the camera body 100, and the power required to cause the flash light source 431 to emit light based on the voltage boosted by the boosting circuit unit. Storage circuit unit (storage unit / capacitor / or capacitor). The charging unit 432 causes the flash light source 431 to emit light by supplying the power stored in the storage unit (storage circuit unit) to the flash light source 431.

  The charging unit 432 starts or stops charging the storage unit of the charging unit 432 according to a signal supplied from the accessory control unit 440. The charging unit 432 detects the amount of charge (charged amount, amount of charge) stored in the storage unit by detecting the voltage (charging voltage) between the electrodes of the storage unit during the charging process for charging the storage unit. be able to. The charging unit 432 supplies information indicating the detected charge amount of the storage unit to the accessory control unit 440.

  Note that the charging unit 432 includes a known light emission control circuit (for example, a circuit that controls the start / stop of light emission like a known IGBT), and the flash light source 431 is set according to a signal input from the accessory control unit 440. It is possible to emit light in synchronization with the photographing timing and to control the light emission amount of the flash light source 431.

  The illumination light emitting unit 435 includes an illumination light source driving unit 436 and an illumination light source 437. The illumination light source 437 of this embodiment includes a solid light source such as a light emitting diode (LED) capable of emitting continuous illumination light. The illumination light source drive unit 436 causes the illumination light source 437 to emit light by supplying a current to the illumination light source 437. Of course, the illumination light source 437 can emit not only continuous illumination light but also illumination light intermittently by intermittently supplying current by the illumination light source driving unit 436. The illumination light source driving unit 436 causes the illumination light source 437 to emit light in synchronization with the photographing timing under the control of the accessory control unit 440. The illumination light source driving unit 436 controls the time (lighting time) for causing the illumination light source 437 to emit light according to the signal input from the accessory control unit 440.

  Although not shown, the accessory 400 includes a first conduction switch that switches an electrical conduction state (ON / OFF) with respect to the power supply line 481 of the flash light emission unit 430 and an electrical connection with respect to the power supply line 481 of the illumination light emission unit 435. And a second continuity switch for switching the continuity state (ON / OFF). These first and second conduction switches are controlled by the accessory control unit 440. Therefore, when the camera system 1 performs imaging by causing the light emitting unit 425 to function, the accessory 400 is controlled by the accessory control unit 440 by controlling the first and second conduction switches and the flash light emitting unit 430 and the illumination light emitting unit 435. Alternatively, light can be emitted alternatively from the flash light emitting unit 430 or the illumination light emitting unit 435, or from both light emitting units.

  In the present embodiment, the maximum light emission amount of the flash light emitting unit 430 is larger than the maximum light emission amount of the illumination light light emitting unit 435. The flash light emitting unit 430 is turned on when a still image is captured, for example, and can illuminate the subject brighter than when the illumination light emitting unit 435 is turned on. In the present embodiment, the longest lighting time (longest lighting time) of the illumination light emitting unit 435 is longer than the longest lighting time of the flash light emitting unit 430. The illumination light emitting unit 435 is turned on, for example, when a moving image is captured, and can illuminate the subject for a longer time than the lighting time of the flash light emitting unit 430.

  In the present embodiment, the light emitted from the flash light emitting unit 430 may be referred to as flash light, and the function of the flash light emitting unit 430 emitting flash light may be referred to as a flash light emitting function. In addition, the light emitted from the illumination light emitting unit 435 may be referred to as illumination light, and the function of the illumination light emitting unit 435 emitting illumination light may be referred to as an illumination light emitting function.

  In the present embodiment, each of the first pilot lamp 455 and the second pilot lamp 460 includes a solid light source such as an LED. The first pilot lamp 455 is turned on according to the state of the flash light emitting unit 430 under the control of the accessory control unit 440. For example, the accessory control unit 440 turns on the first pilot lamp 455 when the flash light emitting unit 430 can emit light (when the charge storage unit is fully charged). Further, when the flash light emitting unit 430 cannot emit light (when the charge storage unit has insufficient charge), the accessory control unit 440 turns off the first pilot lamp 455. Similarly to the first pilot lamp 455, the second pilot lamp 460 is in a state where the illumination light emitting unit 435 can be turned on by the accessory control unit 440 (the above-described second conduction switch is in an ON state). Turns on or off.

  In the present embodiment, the first switch portion 465 (MSW) is mechanically interlocked with the locking claw 422 (see FIG. 4) described above. The first switch unit 465 closes or interrupts the circuit when the locking claw 422 moves in a predetermined direction (Z-axis direction). The first switch portion 465 closes the circuit when the tip of the locking claw 422 protrudes beyond a predetermined distance from the bottom portion 421 of the connector 420. That is, the first switch unit 465 closes the circuit when the accessory 400 is completely attached to the camera 10. On the other hand, the first switch portion 465 cuts off the circuit when the locking claw 422 is pushed toward the bottom portion 421 of the connector 420 by a predetermined amount or more.

In the present embodiment, the second switch unit 470 (PCSW) is mechanically linked to the above-described second operation unit 471 (see FIG. 2). The second switch unit 470 closes or interrupts the circuit when the second operation unit 471 is operated.
In the present embodiment, the function expansion setting unit 485 (EXSW, first setting unit) generates and outputs a function expansion setting signal Op indicating the type of the accessory 400. For example, the accessory 400, the conversion device 700, and the display device 900 can be identified in the function extension setting signal Op generated by the function extension setting unit 485 (EXSW). The accessory 400 is an accessory (illumination device) that requires power supply from the camera 10. The conversion device 700 is an accessory that does not require power supply from the camera 10. The display device 900 is an accessory that requires power supply from the camera 10, and a signal supplied from the camera 10 is an accessory different from the accessory 400 and the conversion device 700. As described above, the camera 10 is required to switch the presence / absence of power supply or change the assignment of the control signal to be supplied depending on the type of accessory.

  Therefore, the function expansion setting unit 485 (EXSW) generates a function expansion setting signal Op corresponding to the type of accessory and supplies it to the camera 10. For example, the function expansion setting unit 485 (EXSW) provided in the accessory 400 generates a function expansion setting signal Op indicating that the accessory type is an accessory (illumination device) that requires power supply from the camera 10. Output. Alternatively, the function expansion setting unit 485 (EXSW) provided in the conversion apparatus 700 generates and outputs a function expansion setting signal Op indicating that the accessory type is an accessory that does not require power supply from the camera 10. . Alternatively, the function expansion setting unit 485 (EXSW) provided in the display device 900 is an accessory whose accessory type requires power supply from the camera 10, and a signal supplied from the camera 10 is converted to the accessory 400. A function expansion setting signal Op indicating that the accessory is different from the device 700 is generated and output.

For example, the function expansion setting signal Op is defined as a signal that distinguishes the above three types of accessories according to the voltage level. By defining the function expansion setting signal Op in this way, the two types of accessories can be distinguished by setting two threshold voltages and determining the voltage level in three stages. For example, the case where the detection level (V) of the function expansion setting signal Op is equal to or higher than the threshold voltage Vth1 (Vth1 ≦ V) is associated with the accessory 400 that requires power supply from the camera 10. Further, when the detection level (V) of the function expansion setting signal Op is equal to or higher than the threshold voltage Vth2 and lower than the threshold voltage Vth1 (Vth2 ≦ V <Vth1), it is associated with the display device 900 that requires power supply from the camera 10. . Furthermore, the case where the detection level (V) of the function expansion setting signal Op is less than the threshold voltage Vth2 (V <Vth2) is associated with the conversion device 700 that does not require power supply from the camera 10.
When the signal level (V) of the function expansion setting signal Op is generated so as to be equal to or higher than the threshold voltage Vth1 (Vth1 ≦ V), for example, the function expansion setting unit 485 (EXSW) in the accessory 400 is pulled down. It may be generated as a function expansion setting signal Op in an up signal level or a high impedance state. Since the function extension setting signal Op is pulled up in the camera 10, the signal level of the function extension setting signal Op (unless there is a configuration for reducing the signal level on the function extension setting unit 485 (EXSW) side) It is determined that V) is equal to or higher than the threshold voltage Vth1 (Vth1 ≦ V).

  The first power supply unit (power supply unit 1) 450-1 includes a constant voltage circuit that stabilizes the voltage of the power supplied from the camera 10 (constant voltage control). The first power supply unit 450-1 can supply the power whose voltage is stabilized by the constant voltage circuit to the second power supply unit (power supply unit 2) 450-2 and the illumination light emitting unit 435. The first power supply unit 450-1 is connected to a reference potential line 480 (SGND). The second power supply unit 450-2 generates power for the accessory control unit 440 from the power supplied from the first power supply unit 450-1. The second power supply unit 450-2 is also connected to the reference potential line 480 (SGND).

  The storage unit 444 includes a nonvolatile memory 445. The nonvolatile memory 445 can hold information even when power is not supplied to the accessory 400. The nonvolatile memory 445 includes at least one of a memory that can rewrite stored data and a memory (for example, ROM) that cannot rewrite stored data. The nonvolatile memory 445 includes a program for operating the accessory control unit 440, information indicating the state of the accessory 400 (initial state and various accessory setting states currently set in the memory in the accessory control unit 440), camera Information such as information indicating the camera state (initial state and setting state) acquired from 10 is stored.

  The accessory control unit 440 includes a CPU that controls the operation of the components of the accessory 400 based on a program stored in the nonvolatile memory 445 and an electronic component such as an ASIC. The accessory control unit 440 communicates with the camera control unit 170 via the terminal unit 423 and the terminal unit 25. The accessory control unit 440 can send at least one piece of information included in the accessory initial state information or the accessory setting state information stored in the storage unit 444 to the camera control unit 170. In addition, the accessory control unit 440 causes the storage unit 444 to store information received from the camera control unit 170.

  The accessory initial state information includes accessory type information indicating the type of the accessory 400. The accessory type information includes battery presence / absence information indicating whether or not a battery is mounted on the accessory 400, function type information indicating the type of each function included in the accessory 400, and characteristic information indicating characteristics of each function included in the accessory 400. Including. The function type information includes information indicating the presence / absence of a flash light emission function, information indicating the presence / absence of an illumination light emission function, and information indicating the presence / absence of an extended function. The extended function is another function that does not correspond to either the flash light emission function or the illumination light emission function, such as a multi-light commander function, a GPS (Global Positioning System) function, a communication function with devices other than the camera body 100, and the like. . The characteristic information of the flash light emitting function includes information (profile information) indicating the light emission characteristics of the flash light emitting unit 430. The characteristic information of the illumination light emitting function includes information indicating the light emission characteristic of the illumination light emitting unit 435 (illumination profile information), and information indicating the longest time during which the illumination light emitting unit 435 can continuously emit light (longest lighting time). Including.

  The accessory setting state information includes information indicating whether the flash light emission function is on (valid) or off (invalid), and whether the illumination light emission function is on (valid) or off (invalid). Information indicating whether or not the current state is present.

  The accessory control unit 440 controls the components of the accessory 400 based on the control signal supplied from the camera control unit 170. The accessory control unit 440 performs light emission control for causing the flash light emission unit 430 or the illumination light emission unit 435 to emit light in accordance with the light emission control signal X supplied from the camera control unit 170. In the light emission control for causing the flash light emitting unit 430 to emit light, the accessory control unit 440 controls the charging unit 432 so that the flash light source 431 emits light in synchronization with the photographing timing on the camera side. In the light emission control for causing the illumination light emitting unit 435 to emit light, the accessory control unit 440 controls the illumination light source driving unit 436 so that the illumination light source 437 emits light in synchronization with the photographing timing.

  Further, the accessory 400 according to the present embodiment does not include (built in) a power source (battery) for charging the storage unit (charge storage unit) of the charging unit 432, and is charged by the power supplied from the camera 10. Do. The accessory control unit 440 notifies the camera control unit 170 from the accessory 400 that the lighting device requires power supply from the camera control unit 170 at the stage of the initialization process. Thereafter, when the accessory control unit 440 receives a command (hereinafter referred to as a “charge command”) for instructing the storage unit (charge storage unit) to start charging from the camera control unit 170, the accessory control unit 440 stores the storage unit (charges) in the charging unit 432. Charging to the storage unit) is started.

  Next, the terminal part 423 of the accessory 400 will be described. As shown in FIGS. 5 and 7, the terminal portion 423 is electrically connected to the terminal portion 25 of the camera 10 when the accessory 400 is attached to the camera 10. The terminal portion 423 includes a plurality (12) of terminals indicated by reference signs Ts1 to Ts12. Here, the numbers indicating the arrangement order of the terminals to be described next are numbers that increase in ascending order from one side (+ X side) to the other side (−X side) in the terminal arrangement direction (X-axis direction). To do.

  Each of the plurality of terminals Ts1 to Ts12 includes a linear (line shape) portion extending in a direction (+ Y direction) substantially parallel to the direction in which the camera is mounted (see FIG. 5). Then, in the contact portion (portion in contact with the terminal Tp7 in FIG. 8B) formed in the vicinity of the tip end portion of these line shapes (+ Y direction side), corresponding terminals (Tp1 to Tp12 on the camera side). ) In physical contact and electrical connection (see the contact structure between the terminal Ts7 and the terminal Tp7 shown in FIG. 8B). Each of the terminals Ts1 to Ts12 has a leaf spring structure in which a contact portion formed in the vicinity of the distal end portion is urged in the −Z direction (direction pressed against each corresponding contact on the camera side) in the drawing. It has become.

  The function of each terminal in the terminal unit 423 is assigned as follows. Here, the terminals Ts1 to Ts12 of the terminal part 423 are provided corresponding to the terminals (Tp1 to Tp12) of the terminal part 25 on the camera 10 side described with reference to FIGS. . The functions of the terminals of the terminal unit 423 are also associated with the functions of the terminals of the terminal unit 25 described above. For this reason, in the description of the present embodiment, in order to avoid duplication with the description described above with respect to the terminal unit 25, the terminal numbers 1 to 12 of the terminals correspond to the terminals of the terminal unit 25 on the camera side. By describing the terminal numbers with the same number, the description overlapping with respect to the function and arrangement of each terminal is simplified or omitted.

  In the terminal portion 423, the power supply terminal Ts11 and the power supply terminal Ts12 are terminals to which power PWR is supplied from the camera 10, respectively. The ground terminal Ts1 and the ground terminal Ts2 are ground terminals corresponding to the power supply terminal Ts11 and the power supply terminal Ts12, and are terminals whose potential becomes the reference potential (ground) of the power PWR.

  Each of the reference potential terminal Ts3 and the reference potential terminal Ts5 is a terminal whose potential becomes a reference potential (signal ground) for transmitting and receiving signals.

  The synchronization signal terminal Ts4 is a terminal that outputs a synchronization signal (clock signal) CLK, which is a communication clock signal, to the camera 10.

  The communication signal terminal Ts6 is a terminal through which the communication signal DATA including the communication data on the camera side as described above is input from the camera 10 side, or the communication signal DATA on the accessory side is output to the camera 10. .

  The activation state providing terminal Ts7 is a terminal that provides the activation detection level DET (L level / reference potential based on SGND) described above to the camera 10.

  The light emission control signal terminal Ts8 is a terminal to which the above-described light emission control signal (light emission command signal) X is input from the camera 10.

  The communication control signal terminal Ts9 is a terminal to which the above-described communication control signal (communication activation signal) Cs is input from the camera 10.

  The function expansion setting terminal Ts10 is a terminal that provides the camera 10 with the function expansion setting signal Op described above.

  The arrangement of the terminals for these twelve terminals Ts1 to Ts12 corresponds to the terminals Tp1 to Tp12 of the terminal section 25 described above, and will be described briefly.

  The power supply terminal Ts11 and the power supply terminal Ts12 are arranged close to one end in the terminal arrangement of the terminal portion 423. The ground terminal Ts1 and the ground terminal Ts2 are arranged close to the other end (the end opposite to the side where the power supply terminal Ts11 and the power supply terminal Ts12 are arranged) in the terminal arrangement of the terminal portion 423.

  The function expansion setting terminal Ts10 is arranged between the power supply terminal Ts11 and the communication control signal terminal Ts9 in the terminal arrangement of the terminal portion 423.

  The light emission control signal terminal Ts8 is disposed next to the activation state provision terminal Ts7 and is disposed so as to be sandwiched between the activation state provision terminal Ts7 and the communication control signal terminal Ts9.

  The communication signal terminal Ts6 is disposed next to the activation state providing terminal Ts7. Therefore, the activation state providing terminal Ts7 is disposed so as to be sandwiched between the communication signal terminal Ts6 and the light emission control signal terminal Ts8.

  The reference potential terminal Ts5 is disposed next to the communication signal terminal Ts6. Therefore, the communication signal terminal Ts6 is disposed so as to be sandwiched between the reference potential terminal Ts5 and the activation state providing terminal Ts7.

The synchronization signal terminal Ts4 is disposed next to the reference potential terminal Ts5. The reference potential terminal Ts3 is disposed next to the synchronization signal terminal Ts4. Therefore, the synchronization signal terminal Ts4 is disposed so as to be sandwiched between the reference potential terminal Ts3 and the reference potential terminal Ts5.
A ground terminal Ts2 is arranged next to the reference potential terminal Ts3 on the side opposite to the synchronization signal terminal Ts4.

  Next, with reference to FIG. 7, the connection relationship of each component in the accessory 400 is demonstrated.

  The ground terminal Ts1 and the ground terminal Ts2 are connected via a connection pattern shown in FIG. When the accessory 400 is connected to the camera 10, the ground terminal Ts1 and the ground terminal Ts2 are connected to the ground line 43 on the camera 10 side via the terminals Tp1 and Tp2 on the camera 10 side. The ground terminal Ts1 and the ground terminal Ts2 are ground terminals for a circuit (charging unit 432) that uses the power PWR on the accessory 400 side, and are terminals that serve as a reference potential of the supplied voltage on the accessory 400 side. In addition, it is a terminal that becomes a reference potential of the charging voltage.

  The power supply terminal Ts11 is connected to the power supply line 481. The power supply terminal Ts12 is connected to the power supply line 481 in parallel with the power supply terminal Ts11. The power line 481 is a relatively thick wiring pattern (a wiring directly connected to Ts11 on the circuit board so that a large current supplied from the camera 10 can flow through two power terminals (power terminals Ts11 and Ts12). A wiring pattern having a line width equal to or larger than the line width obtained by adding the line width of the pattern and the line width of the wiring pattern directly connected to Ts12). In addition, the wiring pattern connected to the accessory power supply control unit 33 on the camera 10 side is also a relatively thick wiring pattern, similar to the accessory 400 side.

  The reference potential terminal Ts3 and the reference potential terminal Ts5 are connected via a connection line as shown in FIG. The reference potential terminal Ts3 and the reference potential terminal Ts5 are connected in parallel to the reference potential line 480 (SGND). When the accessory 400 is connected to the camera 10, the reference potential line 480 is connected to the ground line (SGND) 42 on the camera 10 side via the reference potential terminals Ts3 and Ts5 and the terminals Tp3 and Tp5 on the camera 10 side. Connected. The reference potential terminal Ts3 and the reference potential terminal Ts5 are connected to each circuit in the accessory 400 (MSW 465, PCSW 470, nonvolatile memory 445, first power supply unit 450-1, second power supply unit 450-2, accessory control unit 440, illumination. In the light emitting unit 435), a terminal serving as a reference potential for transmitting and receiving signals.

  Note that the ground terminal Ts1 and the ground terminal Ts2 are also connected in parallel to the reference potential line 480 (SGND) via the connection line 490. However, the connection line connected to the ground terminal Ts1 and the ground terminal Ts2 (the line connected to the connection line 490) is more resistant (impedance) than the line connected to the connection line 490 and the reference potential terminals Ts3 and Ts5. Is a low line. For this reason, the large current that has flowed through the charging unit 432 does not flow to the SGND line (reference potential terminals Ts3, Ts5).

  The current flowing through the reference potential line 480 flows to the ground terminals Ts1 and Ts2 via the connection line 490, and the ground terminals Ts1 and Ts2 are the reference voltages supplied to the above circuits in the accessory 400. Can be. In addition, a so-called single-point ground (single-point ground) is adopted as the ground of the accessory 400 of the present embodiment.

  The activation state providing terminal Ts7 is connected to a first terminal of a switch 466 (shown in FIG. 8B) in the first switch unit 465 via a signal line. The second terminal of the switch 466 in the first switch unit 465 is connected to the first terminal of the switch 472 (shown in FIG. 8B) in the second switch unit 470. A second terminal of the switch 472 in the second switch unit 470 is connected to the reference potential line 480. Thus, the 2nd switch part 470 is connected in series with the 1st switch part 465 with respect to the signal wire | line connected to the starting state provision terminal Ts7.

  The synchronization signal terminal Ts4 is connected to the accessory control unit 440 via a signal line. The communication signal terminal Ts6 is connected to the accessory control unit 440 via a signal line. The signal line connected to the communication signal terminal Ts6 is provided with a pull-up resistor. This pull-up resistor is electrically connected to the output side of the second power supply unit 450-2. For this reason, the potential (level) at the communication signal terminal Ts6 is maintained at the H level before being attached to the camera 10 and before starting communication with the camera 10.

  The communication control signal terminal Ts9 is connected to the accessory control unit 440 via a signal line. The signal line connected to the communication control signal terminal Ts9 is provided with a pull-up resistor. This pull-up resistor is electrically connected to the output side of the second power supply unit 450-2. Therefore, the potential (level) at the communication signal terminal Ts6 is maintained at the H level before being attached to the camera 10 and before starting communication with the camera 10.

  The light emission control signal terminal Ts8 is connected to the accessory control unit 440 via a signal line. The signal line connected to the light emission control signal terminal Ts8 is provided with a pull-up resistor. This pull-up resistor is electrically connected to the output side of the second power supply unit 450-2. Therefore, the potential (level) at the communication signal terminal Ts6 is maintained at the H level before being attached to the camera 10 and before starting communication with the camera 10.

  The function expansion setting terminal Ts10 is connected to one end of the function expansion setting unit 485 via a signal line. The other end of the function expansion setting unit 485 is connected to the reference potential line 480.

  The first electrode for main discharge in the flash light source 431 of the flash light emitting unit 430 is connected to the charging unit 432. The second electrode for main discharge is connected to the power supply line 481. A power supply terminal of the charging unit 432 is connected to the power supply line 481. The ground terminal of the charging unit 432 is connected to a ground line connected to the ground terminal Ts1.

The power supply terminal of the illumination light source drive unit 436 is connected to the first power supply unit 450-1. The ground terminal of the illumination light source driving unit 436 is connected to the reference potential line 480. A control terminal of the illumination light source driving unit 436 is connected to the accessory control unit 440 via a signal line.
In the illumination light source 437, the anode of the solid light source is connected to the illumination light source driving unit 436, and the cathode of the solid light source is connected to the reference potential line 480.

  One end of each of the first pilot lamp 455 and the second pilot lamp 460 is electrically connected to the output side of the second power supply unit (power supply unit 2) 450-2. The other end of the first pilot lamp 455 is connected to the accessory control unit 440 via a signal line. The other end of the second pilot lamp 460 is connected to the accessory control unit 440 via a signal line different from that of the first pilot lamp 455.

  The input terminal of the first power supply unit (power supply unit 1) 450-1 is connected to the power supply line 481. The ground terminal of the first power supply unit 450-1 is connected to the reference potential line 480. The output terminal of the first power supply unit 450-1 is connected to the input terminal of the second power supply unit (power supply unit 2) 450-2 and the illumination light source drive unit 436. The output terminal of the second power supply unit 450-2 is connected to the power supply terminal of the accessory control unit 440. The ground terminal of the second power supply unit 450-2 is connected to the reference potential line 480.

  Next, the connection relationship between the camera 10 and the accessory 400 will be described. In a state where the accessory 400 is mounted on the camera 10 (hereinafter referred to as a mounted state), the ground terminal Ts1 is connected to the ground terminal Tp1 of the camera 10. The ground terminal Ts2 is connected to the ground terminal Tp2 of the camera 10 in the mounted state. And the place (grounding terminal of the charging part 432) connected to the grounding terminals Ts1 and Ts2 on the accessory 400 side is a path through the grounding terminal Tp1 and the grounding terminal Ts1, and the grounding terminal Tp2 and the grounding terminal in the mounted state. It is connected to the ground line 43 and connected to the negative electrode of the battery BAT via at least one of the paths via Ts2. Therefore, the potentials of the ground terminals Ts1 and Ts2 and the locations connected to them are reference potentials corresponding to the potential of the negative electrode of the battery BAT in the mounted state.

  The power supply terminal Ts11 is connected to the power supply terminal Tp11 of the camera 10 in the mounted state. The power supply terminal Ts12 is connected to the power supply terminal Tp12 of the camera 10 in the mounted state. In the mounted state, the accessory power supply control unit 33 is connected to the power supply line 481 via at least one of the path via the power supply terminal Tp11 and the power supply terminal Ts11 and the path via the power supply terminal Tp12 and the power supply terminal Ts12. Is done. Therefore, the accessory power supply control unit 33 supplies the power PWR supplied from the battery BAT to the accessory power supply control unit 33 to each circuit or electrical component in the accessory 400 via the power supply line 481 according to the control of the camera control unit 170. can do.

  The reference potential terminal Ts3 is connected to the reference potential terminal Tp3 of the camera 10 in the mounted state. The reference potential terminal Ts5 is connected to the reference potential terminal Tp5 of the camera 10 in the mounted state. The potential of the reference potential terminal Ts3 becomes the potential (reference potential) of the reference potential terminal Tp3 in the mounted state. The potential of the reference potential terminal Ts5 becomes the potential (reference potential) of the reference potential terminal Tp5 in the mounted state.

  As shown in FIG. 4, the ground terminal Tp1, the ground terminal Tp2, and the reference potential terminal Tp3 are longer in the slide movement direction (+ Y-axis direction) than the other terminals. Therefore, when the accessory 400 is attached to the camera 10 in the present embodiment, the three terminals of the ground terminal Tp1, the ground terminal Tp2, and the reference potential terminal Tp3 correspond to the terminal portion 423 of the accessory 400 before the other terminals. Contact with each terminal (ground terminal Ts1, ground terminal Ts2, reference potential terminal Ts3).

  The activation state providing terminal Ts7 is grounded via the reference potential line 480 when the accessory 400 is attached to the camera 10 and the second switch unit 470 closes the circuit (ON state). Connected to line 42. Therefore, the camera control unit 170 detects that the first switch is in the first state when the second switch unit 470 is in the on state and connected to the camera 10 (hereinafter referred to as the first state). The level DET (SGND level / reference potential level / Low level / L level) can be detected via the activation state providing terminal Ts7 and the activation state detection terminal Tp7. Further, the camera control unit 170 can detect the activation detection level DET that is electrically different from the first state in the following second state. The second state includes one of a state in which the second switch unit 470 is off and the camera 10 is mounted, and a state in which the accessory 400 is not mounted on the camera 10.

The function expansion setting terminal Ts10 is connected to the function expansion setting terminal Tp10 of the camera 10 in the mounted state. That is, the accessory control unit 440 is connected to the camera control unit 170 via the function expansion setting terminal Tp10 and the function expansion setting terminal Ts10 in the mounted state. As a result, the accessory 400 can provide the camera control unit 170 with the function expansion setting signal Op for identifying the type of the accessory 400 via the function expansion setting terminal Tp10 and the function expansion setting terminal Ts10. Here, since the type of accessory is an accessory that requires power supply from the camera 10 (accessory 400, lighting device), the function expansion setting signal Op for identifying the type of the accessory 400 is sent to the camera control unit 170. Provided.
The function expansion setting signal Op provided to the function expansion setting terminal Ts10 is a signal corresponding to the type of accessory.

  The synchronization signal terminal Ts4 is connected to the synchronization signal terminal Tp4 of the camera 10 in the mounted state. That is, the accessory control unit 440 is connected to the camera control unit 170 through the synchronization signal terminal Tp4 and the synchronization signal terminal Ts4 in the mounted state. Thereby, the accessory control part 440 can transmit the synchronous signal CLK for performing synchronous communication with the camera control part 170 to the camera control part 170 via the synchronous signal terminal Ts4 and the synchronous signal terminal Tp4. In addition, the camera control unit 170 can transmit a monitor light emission control signal that causes the accessory 400 to execute the following monitor light emission to the accessory control unit 440 via the synchronization signal terminal Ts4 and the synchronization signal terminal Tp4.

  The monitor light emission is light emission performed before the main light emission used for the main imaging. The result of imaging (monitor imaging) by monitor light emission is used for at least one of white balance adjustment such as auto white balance (AWB) control and exposure control such as auto exposure (AE) control.

  The communication signal terminal Ts6 is connected to the communication signal terminal Tp6 of the camera 10 in the mounted state. That is, the accessory control unit 440 is connected to the camera control unit 170 through the communication signal terminal Tp6 and the communication signal terminal Ts6 in the mounted state. Therefore, the camera control unit 170 and the accessory control unit 440 can perform serial data communication via the communication signal terminal Tp6 and the communication signal terminal Ts6 in the mounted state. The communication signal terminals Tp6 and Ts6 can both switch input / output functions, and communication between these terminals is bidirectional communication in which the communication direction can be switched. The data communicated as the communication signal DATA is as follows. The data output from the camera 10 includes a command (command) that causes the accessory 400 to execute processing by the camera control unit 170, information about the camera 10 (camera data), and the like. On the other hand, the data output from the accessory 400 side includes information on the accessory 400 (accessory information). In the present embodiment, sending (or receiving) data indicating a command or information may be simply sending (or receiving) a command or information. Note that the communication signal DATA is transmitted in synchronization with the synchronization signal CLK output from the accessory 400 side regardless of whether the camera control unit 170 transmits or the accessory control unit 440 transmits.

  For example, the camera control unit 170 transmits to the accessory control unit 440 a transmission notification command (command) for notifying that information on the designated item is transmitted from the camera control unit 170 to the accessory control unit 440. After transmission of the transmission notification command is completed, the camera control unit 170 transmits information on items specified in the transmission notification command to the accessory control unit 440 after a transmission of the transmission notification command with a predetermined time interval.

  For example, the camera control unit 170 can transmit a transmission request command for requesting transmission of designated information from the accessory control unit 440 to the camera control unit 170 to the accessory control unit 440. After the reception of the transmission request command is completed, the accessory control unit 440 transmits information on items specified in the transmission notification command to the camera control unit 170 following reception of the transmission notification command.

The communication control signal terminal Ts9 is connected to the communication control signal terminal Tp9 of the camera 10 in the mounted state. That is, the accessory control unit 440 is connected to the camera control unit 170 through the communication control signal terminal Tp9 and the communication control signal terminal Ts9 in the mounted state.
Therefore, the camera control unit 170 can supply the communication control signal Cs to the accessory control unit 440 via the communication control signal terminal Tp9 and the communication control signal terminal Ts9.

  When information such as the “charge request” described above is transmitted from the accessory 400 side to the camera 10 side, the accessory control unit 440 receives the communication control signal Cs received from the camera 10 side at the communication control signal terminal Ts9. Information is transmitted to the camera control unit 170 in a steady communication sequence (described later) that is started as a trigger.

  This communication control signal Cs is a signal that determines the communication start timing of communication between the camera 10 and the accessory 400 via the communication signal terminal Ts6. On the accessory 400 side, a pull-up resistor is connected to the wiring pattern connected to the communication control signal terminal Ts9. For this reason, the signal level of the communication control signal Cs at the communication signal terminal Ts6 is maintained at the H level before the start of communication. The signal level of the communication control signal Cs is lowered to the L level and maintained by the camera control unit 170 when starting data communication via the communication signal terminal Ts6. While the signal level of the communication control signal Cs is maintained at the L level, data of a plurality of bits is transmitted / received as the communication signal DATA in synchronization with the synchronization signal CLK. After a plurality of bits of data are transmitted / received, the signal level of the communication control signal Cs is maintained at the H level again by the pull-up resistor in the period until the next transmission of the communication signal DATA. As described above, the communication control signal Cs is a signal in which the number of switching of the signal level (H level and L level) per unit time is smaller than that of the communication signal DATA and the synchronization signal CLK.

The light emission control signal terminal Ts8 is connected to the light emission control signal terminal Tp8 of the camera 10 in the mounted state. That is, the accessory control unit 440 is connected to the camera control unit 170 through the light emission control signal terminal Tp8 and the light emission control signal terminal Ts8 in the mounted state.
Therefore, the camera control unit 170 sends the light emission control signal X that causes the accessory 400 to perform light emission (main light emission) in synchronization with the photographing timing via the light emission control signal terminal Ts8 and the light emission control signal terminal Tp8. Can be supplied to. The accessory control unit 440 performs light emission control according to the light emission control signal X.

Charging unit 432 includes a booster circuit that boosts the voltage of power supplied via power supply line 481 and a storage unit (charge storage unit) that is charged by the voltage boosted by the booster circuit. In addition, the charging unit 432 is connected to the accessory control unit 440 through the first signal line.
The accessory control unit 440 can supply a signal for controlling the charging unit 432 to the charging unit 432 via the first signal line. The charging unit 432 is connected to the accessory control unit 440 via the second signal line. The charging unit 432 can supply information indicating the amount of charge of the charging unit 432 to the accessory control unit 440 via the second signal line.

  The accessory control unit 440 supplies a signal for controlling the illumination light source driving unit 436 to the illumination light source driving unit 436 through a signal line. Therefore, the illumination light source 437 can emit light by power supplied via the power line 481 and the illumination light source driving unit 436.

  The lighting state of each of the first pilot lamp 455 and the second pilot lamp 460 is controlled by a control signal supplied from the accessory control unit 440 via a signal line. The first pilot lamp 455 is turned on, for example, in a state where the light emission of the flash light emitting unit 430 is permitted by the accessory control unit 440. The first pilot lamp 455 is turned off, for example, in a state where the flash light emitting unit 430 cannot emit light. Similar to the first pilot lamp 455, the second pilot lamp 460 is turned on or off according to the state of the illumination light emitting unit 435 under the control of the accessory control unit 440.

  The first power supply unit 450-1 stabilizes the voltage input to the input terminal of the first power supply unit 450-1 based on the power supplied from the power supply line 481 and supplies it to the subsequent circuit. Based on the electric power supplied from the first power supply unit 450-1, the second power supply unit 450-2 stabilizes the voltage input to the input terminal of the second power supply unit 450-2 and supplies it to the subsequent circuit.

  Next, the level switching unit 475 will be described.

  FIG. 8 is a diagram schematically illustrating a connection relationship between the activation state detection terminal Tp7 and the camera control unit 170. FIG. 8A shows a connection relationship between the activation state detection terminal Tp7 and the camera control unit 170 in association with a cross-sectional view of the shoe seat 15. FIG. 8B illustrates the configuration and connection relationship of the level switching unit 475 in association with the cross-sectional view of the connector 420.

  As shown in FIG. 8A, a voltage is applied to the activation state detection terminal Tp7 connected to the camera control unit 170 via a pull-up resistor 482. In a state where the activation state detection terminal Tp7 is not connected to the activation state provision terminal Ts7 of the accessory 400, the potential of the activation state detection terminal Tp7, that is, the activation detection level DET is H (high) level. The H level is set to a potential higher than the reference potential SGND of the ground line 42, for example.

  The accessory 400 of this embodiment includes a level switching unit 475. As illustrated in FIG. 8B, the level switching unit 475 includes a first switch unit 465, a second switch unit 470, a first operation unit 424, and a second operation unit 471.

  The first switch unit 465 switches the state according to the attachment / detachment of the camera body 100 and the accessory 400. The first switch unit 465 includes a movable member (locking claw 422) and a switch 466 (electric switch) that is interlocked with the movement of the locking claw 422. The locking claw 422 moves in a predetermined direction (+ Z side in the Z-axis direction) by a force received from the camera body 100 when the accessory 400 is attached to the camera body 100. The switch 466 closes or shuts off the circuit in conjunction with the movement of the locking claw 422. When the connector 420 is inserted to a predetermined position of the shoe seat 15, the locking claw 422 of the connector 420 protrudes into the locking hole 27 of the shoe seat 15, whereby the switch 466 of the first switch portion 465 is moved as shown in FIG. The circuit of B) is closed. Further, when the accessory 400 is attached to the camera body 100, the locking claw 422 restricts the movement of the accessory 400 relative to the camera body 100 by being locked to the camera body 100.

  Further, when the first switch unit 465 is detached from the first operation unit 424 (operation for removing the connector 420 from the shoe seat 15), the latching claw 422 is moved in the Z-axis direction by the operation. Then, it is pushed from the inside of the locking hole 27 toward the accessory main body 410, whereby the switch 466 blocks the circuit of FIG. 8B (opens the circuit).

  The second switch unit 470 switches the level of the activation detection level DET when operated by the user. The second switch unit 470 includes a second operation unit 471 and a switch 472 (electric switch).

  The second switch unit 470 is a circuit shown in FIG. 8B by a switch 472 that is linked to the movement of the second operation unit 471 in response to a user performing a function ON operation or a function OFF operation on the second operation unit 471. Is closed (closed) or shut off (opened) (closed by function ON operation, opened by function OFF operation).

  The first operation unit 424 is operated by the user in order to move the locking claw 422 in a predetermined direction. The first operation unit 424 moves the locking claw 422 in a predetermined direction (Z-axis direction) by transmitting the force received by the user's operation to the locking claw 422. When the first operation unit 424 is operated with the accessory 400 mounted on the camera body 100, the locking claw 422 moves in the Z-axis direction and faces the accessory body 410 from the inside of the locking hole 27. And leave. As a result, the accessory 400 is released from the camera body 100 and can be removed from the camera body 100, and the first switch unit 465 blocks the circuit.

  When the switch 466 closes the circuit and the switch 472 closes the circuit (the “ON” position), the activation state providing terminal Ts7 of the accessory 400 is connected to the switch 466 and the switch 472. To the reference potential line 480 described above. When the connector 420 is connected to the shoe seat 15, the reference potential line 480 is electrically connected to the ground line (SGND / signal ground) 42 of the camera body 100 as described above.

  In a state where the connector 420 is connected to the shoe seat 15 (mounted state), the activation state providing terminal Ts7 of the accessory 400 is electrically connected to the ground line 42 of the camera body 100, and the potential of the activation state providing terminal Ts7 is L (Low) level. In a state where the connector 420 is connected to the shoe seat 15, the activation detection level DET becomes L level when the potential of the activation state detection terminal Tp7 of the camera body 100 is short-circuited with the activation state providing terminal Ts7 of the accessory 400. The L level is set to the same potential as the ground line 42 (reference potential SGND). When the first operation unit 424 is operated in a state where the connector 420 is connected to the shoe seat 15, the activation detection level DET becomes the H level because the first switch unit 465 cuts off the circuit. In addition, the activation detection level DET is H because the switch 472 shuts off the circuit even when the second operation unit 471 of the second switch unit 470 is turned off while the connector 420 is connected to the shoe seat 15. Become a level. That is, when the accessory 400 is attached to the camera 10, even if an operation for removing the connector 420 from the shoe seat 15 is performed on the first operation unit 424, or the function is off for the second operation unit 471. The activation detection level DET is at the H level regardless of whether the operation is performed.

  By the way, in general, when a short circuit occurs due to dust or the like adhering between terminals of an accessory or a camera terminal part, the camera system is stabilized due to an unexpected current flowing between the shorted terminals. May not work. In addition, the camera system may not operate stably due to the influence of noise on the signal supplied via the terminal between the camera and the accessory. For example, the camera system may not be stably operated, and may not respond to user operations or may be slow to respond, which may reduce convenience.

  On the other hand, as shown in FIGS. 5 and 7, the accessory 400 of the present embodiment has a terminal arrangement of the terminal portion 423 as follows. The power supply terminal Ts11 and the power supply terminal Ts12 to which power is supplied from the camera 10 are arranged at the 11th and 12th positions, respectively. The ground terminal Ts1 and the ground terminal Ts2 corresponding to the power supply terminal Ts11 and the power supply terminal Ts12 are arranged at the first and second, respectively. The activation state providing terminal Ts7 that outputs the activation detection level DET that changes in accordance with the attachment / detachment of the camera 10 and the accessory 400 to the camera 10 is arranged seventh. The light emission control signal terminal Ts8 to which the light emission control signal X for controlling the light emission state of the flash light emitting unit 430 or the illumination light light emitting unit 435 is input from the camera 10 is arranged in the eighth. A communication signal terminal Tp6 to which a control signal for controlling the accessory 400 is supplied as a communication signal DATA for communicating with the camera 10 is arranged sixth. A synchronization signal terminal Ts4 that outputs a synchronization signal CLK synchronized with the communication signal DATA to the camera 10 is arranged fourth. The communication control signal terminal Ts9 to which the communication control signal Cs for determining the communication timing of communication with the camera 10 accessory 400 is input from the camera 10 is arranged ninth. The reference potential terminal Ts3 and the reference potential terminal Ts5 become the reference potentials of the activation detection level DET, the communication signal DATA, the synchronization signal CLK, the light emission control signal X, and the communication control signal Cs, respectively. Has been placed.

That is, the power supply terminal Ts11 and the power supply terminal Ts12 are arranged so as to be biased toward one side in the terminal arrangement direction, and the ground terminal Ts1 and the ground terminal Ts2 are arranged so as to be biased toward the other side in the terminal arrangement direction. Yes. Therefore, in the camera system 1, since the power supply terminals (the power supply terminal Ts11 and the power supply terminal Ts12) and the ground terminals (the ground terminal Ts1 and the ground terminal Ts2) are largely separated from each other, occurrence of a short circuit between them is suppressed. The occurrence of problems such as response stoppage due to a short circuit between the power supply terminal and the ground terminal can be suppressed, and electrical safety can be maintained.
Further, the accessory 400 has a high degree of freedom in designing the power supply line 481 connected to the power supply terminal Ts11 and the power supply terminal Ts12 or the reference potential line 480 connected to the ground terminal Ts1 and the ground terminal Ts2 inside the accessory 400. . In addition, the arrangement of the plurality of power supply terminals can be facilitated by arranging the plurality of power supply terminals side by side by arranging them closer to the end of the arrangement rather than arranging them between the plurality of terminals. As a result, for example, the accessory 400 can easily increase the width of the power supply line 481 and the reference potential line 480, for example, make the power supply line 481 and the reference potential line 480 low resistance, and the power supply line 481 and the reference potential. High power can be supplied via the line 480. In the present embodiment, as is apparent from the fact that the resistance can be reduced as described above, it is possible to suppress the heat generation at the contact portion, and as a result, it is possible to suppress the occurrence of defects such as deformation due to the heat generation at the contact portion. it can.

  Further, the communication signal terminal Ts6 to which the communication signal DATA indicating information necessary for imaging is supplied is disposed adjacent to the reference potential terminal Ts5 to which the reference potential is supplied. Therefore, the communication signal DATA is less susceptible to noise from the side opposite to the communication signal terminal Ts6 with respect to the reference potential terminal Ts5. Further, the communication signal terminal Ts6 is disposed adjacent to the activation state providing terminal Ts7 on the side opposite to the reference potential terminal Ts5 with respect to the communication signal terminal Ts6. The activation detection level DET is maintained at the L level in a state where the camera 10 and the accessory 400 can communicate with each other. Therefore, the communication signal DATA is less susceptible to noise from the side opposite to the communication signal terminal Ts6 with respect to the activation state providing terminal Ts7 in a state where the camera 10 and the accessory 400 can communicate with each other. As described above, since the communication signal DATA is less affected by noise, the camera system 1 maintains communication safety and suppresses malfunctions such as malfunction caused by the communication signal DATA being affected by noise. be able to.

  The light emission control signal terminal Ts8 is disposed adjacent to the activation state providing terminal Ts7. The activation detection level DET is maintained at the L level when the camera 10 and the accessory 400 can communicate with each other. Therefore, the light emission control signal X is less susceptible to noise from the side opposite to the activation state providing terminal Ts7 with respect to the light emission control signal terminal Ts8. The light emission control signal terminal Ts8 is adjacent to the communication control signal terminal Ts9 on the side opposite to the activation state providing terminal Ts7 with respect to the light emission control signal terminal Ts8. The communication control signal Cs is maintained at the L level during a period in which a plurality of bits of data is communicated in synchronization with the synchronization signal CLK, and the communication from the end of the data communication to the start of the next data communication. In the period, it is maintained at the H level. In this way, the communication control signal Cs has a lower signal level switching frequency than both the synchronization signal CLK and the communication signal DATA. Thus, the light emission control signal X is less susceptible to noise from the side opposite to the communication control signal terminal Ts9 with respect to the light emission control signal terminal Ts8. Thus, the camera system 1 is less susceptible to noise from the light emission control signal X, so that communication safety is maintained, and malfunction due to the light emission control signal X being affected by noise (error light emission operation). The occurrence of defects such as these can be suppressed.

The activation state providing terminal Ts7 is arranged adjacent to the communication signal terminal Ts6.
The communication signal DATA is maintained at the H level when the camera control unit 170 is not transmitting or receiving data. Therefore, when the activation state providing terminal Ts7 is short-circuited with the communication signal terminal Ts6, the activation detection level DET becomes the H level, and the camera control unit 170 determines that the accessory 400 is not attached. Therefore, when the accessory 400 is in an off state, the camera system 1 can detect that the accessory 400 is in an on state and suppress a malfunction. The activation state providing terminal Ts7 is arranged adjacent to the light emission control signal terminal Ts8. The light emission control signal X is maintained at the H level when the camera control unit 170 does not cause the light emitting unit 425 to emit light, and becomes the L level when the camera control unit 170 causes the light emitting unit 425 to emit light. Therefore, when the activation state providing terminal Ts7 is short-circuited with the light emission control signal terminal Ts8, the activation detection level becomes the H level, and the camera control unit 170 determines that the accessory 400 is not attached. Therefore, when the accessory 400 is in an off state, the camera system 1 can detect that the accessory 400 is in an on state and suppress a malfunction, and the electrical safety is high. When the accessory 400 is removed from the camera 10, the terminal Tp6 is also maintained at the H level by the pull-up resistor on the camera body 100 side as described above, and the terminal Tp8 is normally (transmits a light emission signal). (Except when) is at the H level. For this reason, even if the exposed terminal Tp7 on the camera body 100 side is short-circuited to the adjacent terminal (Tp6 or Tp8) due to dust or the like, the camera body 100 is erroneously determined (the accessory is attached and is in the activated state). There is no misjudgment).

  In the present embodiment, the synchronization signal terminal Ts4 is disposed adjacent to the reference potential terminal Ts5 to which the reference potential is supplied. Therefore, the synchronization signal CLK is less susceptible to disturbance (such as noise) from the side opposite to the synchronization signal terminal Ts4 (terminal Ts6 side) with respect to the reference potential terminal Ts5. Further, the synchronization signal terminal Ts4 is disposed adjacent to the reference potential terminal Ts3 to which the reference potential is supplied, on the side opposite to the reference potential terminal Ts5 with respect to the synchronization signal terminal Ts4. Therefore, the synchronization signal CLK is less susceptible to disturbance (such as noise) from the side opposite to the synchronization signal terminal Ts4 (the ground terminal Ts2 side) with respect to the reference potential terminal Ts3. Further, the terminal arranged on the opposite side of the reference potential terminal Ts3 from the synchronization signal terminal Ts4 is the ground terminal Ts2, and the potential of the ground terminal Ts2 is substantially the same as the reference potential, so that the synchronization signal CLK Is less susceptible to noise. In this way, the camera system 1 is less susceptible to noise from the synchronization signal CLK, so that communication safety is maintained, and malfunctions caused by the synchronization signal CLK being a communication reference signal being affected by noise. The occurrence of defects can be suppressed.

  Further, the level switching unit 475 switches the state (electrical level) of the activation detection level DET according to an operation of removing the accessory 400 from the camera 10 or a function off operation. Therefore, the camera 10 can control the accessory 400 according to the removal operation and function off operation of the accessory 400, and can control the accessory 400 stably. In the camera system 1, for example, the camera control unit 170 detects that the accessory 400 is attached to the camera 10 and the function is turned on, and the camera control unit 170 controls the accessory 400 based on the detection result. Since it can be started, the time from when the accessory 400 is mounted until it can function can be shortened.

Further, in the camera system 1, the function expansion setting terminal Ts10 is arranged between the power supply terminal group (Ts11, Ts12) and the terminal group for communication and detection (also referred to as Ts4, Ts6 to Ts9 / communication terminal group). Therefore, it is possible to reduce the possibility that an electrical disturbance (noise, etc.) from the power source adversely affects the communication terminal group. Further, in this embodiment, the function expansion setting terminal Ts10 is intentionally arranged. However, by providing this terminal Ts10, (as compared to a configuration in which no function expansion setting terminal Ts10 is disposed and no terminal exists at this position). ) It is possible to make the contact force (contact pressure) uniform with each corresponding counterpart terminal in all 12 terminals. The function expansion setting terminal Ts10 is a terminal to which a signal for determining a function expansion condition is supplied as described above. For this reason, when the signal supplied to the function expansion setting terminal Ts10 is determined to be the same as the signal indicating the standard function that does not perform function expansion, even if the signal is not supplied, the camera 10 substantially It may not affect the operation. For example, when the accessory 400 is handled as a standard function, the standard function can be specified without receiving a signal from the accessory 400. For this reason, even if the accessory 400 does not include the function expansion setting terminal Ts10, it does not stop operating (functioning) as the accessory 400 and the camera system. For this reason, for example, in order to reduce the number of parts, the function expansion setting terminal Ts10 may be omitted on the accessory 400 side. In addition, the function expansion setting unit 485 (EXSW) of the accessory 400 may not be provided.
Similarly, the function expansion setting terminal Ts10 may be omitted on the camera body 100 side that does not need to support the expansion function.

As shown in FIG. 4, the ground terminal Tp1, the ground terminal Tp2, and the reference potential terminal Tp3 of the terminal portion 25 in the shoe seat 15 are in the direction (-Y side) that enters when the connector 420 is attached. It protrudes from the terminals represented by the symbols Tp4 to Tp12.
As a result, the ground terminal Tp1, the ground terminal Tp2, and the reference potential terminal Tp3 are connected to the ground terminal Tp1, the ground terminal Tp2, and the reference potential terminal Tp3 of the connector 420 before any of the terminals represented by the symbols Tp4 to Tp12, respectively. Will be. As a result, the activation state providing terminal Ts7 of the accessory 400 can stably output the activation detection level DET in a state where the accessory 400 is attached to the camera body 100.

  As described above, the accessory 400 can suppress the occurrence of malfunction, and can improve the convenience of the camera system 1. Further, since the camera 10, the shoe seat 15, and the connector 420 all have the terminal arrangement as described above, the convenience of the camera system 1 can be enhanced.

  One of the power supply terminal Tp11 and the power supply terminal Tp12 may be omitted. Thereby, the number of parts can be reduced. Further, for example, an open terminal may be provided instead of one of the power supply terminal Tp11 and the power supply terminal Tp12. The power supply terminal Tp11 and the power supply terminal Tp12 may be integrated. Similarly to the power supply terminal Tp11 and the power supply terminal Tp12, one of the ground terminal Tp1 and the ground terminal Tp2 may be omitted. Thereby, the number of parts can be reduced. Further, for example, an open terminal may be arranged instead of one of the ground terminal Tp1 and the ground terminal Tp2. The ground terminal Tp1 and the ground terminal Tp2 may be integrated. Further, terminals arranged between a power supply terminal including at least one of the power supply terminal Tp11 and the power supply terminal Tp12 and a ground terminal including at least one of the ground terminal Tp1 and the ground terminal Tp2 are denoted by reference numerals Tp3 to Tp10. One of the terminals, two or more, or all of the terminals may be used.

  In addition, as a structure arrange | positioned so that the light emission control signal terminal Tp8 may be pinched | interposed into the starting state detection terminal Tp7 and the communication control signal terminal Tp9, an integer greater than or equal to 2 is set to L, and the starting state in the terminal arrangement of the terminal part 25 There is a configuration in which the detection terminal Tp7 is arranged at the (L-1) th, the light emission control signal terminal Tp8 is arranged at the Lth, and the communication control signal terminal Tp9 is arranged at the (L + 1) th. . For example, when L is 6, in the terminal arrangement of the terminal portion, the activation state detection terminal Tp7 is arranged fifth, the light emission control signal terminal Tp8 is arranged sixth, and the communication control signal terminal Tp9 is seventh. Be placed.

  The communication signal terminal Tp6 is arranged so as to be sandwiched between the activation state detection terminal Tp7 and the light emission control signal terminal Tp8. There is a configuration in which Tp6 is arranged in the (M−1) th, the activation state detection terminal Tp7 is arranged in the Mth, and the light emission control signal terminal Tp8 is arranged in the (M + 1) th. For example, when M is 4, in the terminal arrangement of the terminal unit, the communication signal terminal Tp6 is arranged third, the activation state detection terminal Tp7 is arranged fourth, and the light emission control signal terminal Tp8 is arranged fifth. Will be.

  Note that, as a configuration in which the communication signal terminal Tp6 is sandwiched between the reference potential terminal Tp5 and the activation state detection terminal Tp7, an integer of 2 or more is N, and the reference potential terminal Tp5 in the terminal arrangement of the terminal portion 25 is used. Is arranged at the (N−1) th, the communication signal terminal Tp6 is arranged at the Nth, and the activation state detection terminal Tp7 is arranged at the (N + 1) th. For example, when N is 8, in the terminal arrangement of the terminal portion, the reference potential terminal Tp5 is arranged seventh, the communication signal terminal Tp6 is arranged eighth, and the activation state detection terminal Tp7 is arranged ninth. Will be.

  As a configuration in which the synchronization signal terminal Tp4 is disposed between the reference potential terminal Tp3 and the reference potential terminal Tp5, an integer of 2 or more is P, and the reference potential terminal Tp3 in the terminal arrangement of the terminal portion 25 is There is a configuration in which the (P-1) th is arranged, the synchronization signal terminal Tp4 is arranged in the Pth, and the reference potential terminal Tp5 is arranged in the (P + 1) th. For example, when P is 6, in the terminal arrangement of the terminal portion, the reference potential terminal Tp3 is arranged fifth, the synchronization signal terminal Tp4 is arranged sixth, and the reference potential terminal Tp5 is arranged seventh. It will be.

  As described above, the camera system 1 has the same reason as that of the terminal arrangement described with reference to FIG. 5 and the like because the terminals indicated by the reference signs Tp1 to Tp12 are arranged under the above-described conditions. Therefore, it becomes a highly convenient system.

  In the present embodiment, the numbers indicating the arrangement of the terminals are numbers that increase in order from one side (+ X side) to the other side (−X side) in the terminal arrangement direction (X-axis direction). The numbers may be ascending from the other side (−X side) to one side (+ X side). In this case, in the terminal arrangement of the terminal portion 25, the first and second terminals are the power supply terminal Tp12 and the power supply terminal Tp11, respectively, and the eleventh and twelfth terminals are the ground terminal Tp2 and the ground terminal Tp1, respectively. It becomes. Further, the above-described modification relating to the arrangement of the plurality of terminals in the terminal portion 25 of the camera body 100 can be applied to the arrangement of the plurality of terminals in the terminal portion 423 of the accessory 400.

  In the present embodiment, the photographic lens 200 shown in FIG. 1 can be attached to and detached from the camera body 100, but it cannot be attached to and detached from the camera body 100 and is integrated with the camera body 100. Good. At least a part of the taking lens 200 may be housed in the camera body 100. In the present embodiment, the camera 10 only needs to include at least the camera body 100 and may not include the photographing lens 200. That is, the photographic lens 200 is an external device (accessory) of the camera and may be a component of the camera system 1. The accessory 400 can be electrically connected between the connector 420 and the shoe seat 15 via a cable or the like, and may be held by a device other than the camera body 100, such as a tripod.

  In the present embodiment, the battery storage unit 110 illustrated in FIG. 6 is built in the camera body 100, but the battery storage unit 110 may be a device (accessory) outside the camera body 100. For example, the battery storage unit 110 may be externally attached to the camera body 100. The camera system 1 can also operate the components of the camera system 1 by power supplied from the outside of the camera body 100 via an AC adapter or the like. The camera system 1 can supply external power to each component of the camera system 1 in the same manner as the power supplied from the battery BAT stored in the battery storage unit 110.

  In the present embodiment, the memory 140 shown in FIG. 6 may be built in the camera body 100 or may be an external device (accessory) of the camera body 100.

  In the present embodiment, the first pilot lamp 455 shown in FIG. 2 is configured so as to indicate the state in which the flash light emitting unit 430 can emit light by switching on or off, but the emitted light The flash light emitting unit 430 may be configured to emit light by changing the wavelength of the light or the cycle of repeating turning on and off. As with the first pilot lamp 455, the second pilot lamp 460 shows a state in which the illumination light emitting unit 435 can emit light by changing the wavelength of the emitted light, the cycle of repeating turning on and off, and the like. It may be configured.

[Camera system for function expansion]
Next, function expansion in the camera system 1 will be described with reference to FIGS. 9 to 13.
As described above, the camera system 1 can expand the functions that can be implemented by a combination with an accessory as an external device. In the above description, the case where the accessory connected to the camera 10 is the lighting device (accessory 400) is described as an example, but other types of accessories may be used. For example, other types of accessories conforming to the standard of the camera system 1 include a GPS device, a display device (EVF device, projector, etc.), a wireless communication device, a microphone, and the like in addition to the illumination device described above.
Furthermore, there is an accessory that is applied to a camera system that conforms to a standard different from the standard of the camera system 1. Even when an accessory in a camera system having a standard different from the standard of the camera system 1 cannot be directly connected to the camera 10, the accessory can be connected to the camera 10 through the conversion device 700 compatible with the camera system 1. There is.
As described above, the camera system 1 is secured to expand so that various functions can be performed by combining various accessories.

The camera 10 extends the functions of the camera system 1 according to the functions of the accessories by identifying the types of the accessories. The camera 10 shows main processing performed to expand the functions of the camera system 1.
(1) The camera 10 (camera control unit 170) selects a supply condition of power supplied from the camera 10 to the accessory according to the type of accessory (for example, accessory type information).
(2) The camera 10 (camera control unit 170) determines whether the accessory connected to the camera 10 is an accessory of the same camera system. For example, it is determined that an accessory connected via a conversion device 700 described later is an accessory of a different camera system. Thus, the function according to an accessory is selected and provided according to the kind of accessory.
(3) The camera 10 (camera control unit 170) selects a signal to be assigned to a signal terminal that electrically connects the camera 10 and the accessory. A signal to be assigned to a signal terminal that electrically connects the camera 10 and the accessory is selected from a plurality of predetermined signals.
(4) The camera 10 (camera control unit 170) sets an interface condition between the camera 10 and the accessory. The interface condition is a condition that electrically defines the connection between the camera 10 and the accessory, and includes, for example, information that defines the signal type assigned to the signal terminal.
(5) The camera 10 (camera control unit 170) selects a signal type to be assigned to the signal terminal by combining the states of a plurality of signal terminals that electrically connect the camera 10 and the accessory.

  Next, the case where the camera system is configured including an accessory different from the accessory 400 will be described in order.

(Function expansion example 1: configuration including camera 10, conversion device 700, and accessory 400B)
FIG. 9 is a diagram illustrating an appearance of the camera system 1 of the present embodiment.
The camera system 1 shown in this figure includes a camera 10 (camera body 100 and photographing lens 200), a conversion device 700, and an accessory 400B.

First, the accessory 400B will be described.
The accessory 400B is shown as an embodiment of an illuminating device that is applied to a camera system of a standard different from the standard that defines the conditions for connecting to the camera body 100 in the camera system 1. Similar to the accessory 400 described above, the accessory 400B of the present embodiment is a lighting device that has a light emitting function and illuminates a subject. However, since the accessory 400B conforms to a standard different from the standard of the camera 1, it cannot be directly connected to the camera body 100.
Therefore, the accessory 400B is connected to the camera body 100 via the conversion device 700.

  Hereinafter, the configuration of the accessory 400B and the conversion device 700 and the connection relationship between the accessory 400B, the conversion device 700, and the camera 10 will be described.

First, the accessory 400B will be described. The accessory 400B shown in this figure includes an accessory main body 410B, a connector 420B, and a light emitting unit 425B.
The light emitting unit 425B includes a flash light emitting unit 430.
Further, the accessory 400B does not include the connector 420 included in the accessory 400, but includes a connector 420B instead of the connector 420.
The accessory main body 410B accommodates various electrical components. The connector 420B is provided below the accessory body 410B.
The accessory 400B is applied to a camera system of a standard different from the standard of the camera system 1. For example, the connector 420B has a shape / electrical specification and the like with respect to the connector 420 suitable for the shoe seat 15. Different.
Therefore, the connector 420B cannot be attached to and detached from the shoe seat 15 of the camera body 100. Therefore, the shape and electrical specifications of the connector are converted by the conversion device 700 so that the accessory 400B can be attached to the camera body 100.
The accessory 400 </ b> B can be attached to and detached from the shoe seat 15 of the camera body 100 through the conversion device 700.

Next, the conversion device 700 will be described.
The conversion device 700 is provided between the accessory 400B and the camera body 100 when the accessory 400B is attached to the camera body 100. The conversion device 700 converts the connector 420 </ b> B included in the accessory 400 </ b> B into a connector 420 that is compatible with the shoe seat 15 of the camera body 100.
The conversion device 700 includes a connector 420, a shoe seat 15B, and a main body 710.
In the main body 710 of the conversion device 700, a shoe seat 15B for mounting the accessory 400B on the conversion device 700 is disposed on the upper portion of the main body 710 (on the + Z side with respect to the main body 710). Further, a connector 420 for mounting the conversion device 700 to the camera 10 is disposed on the lower portion of the main body 710 (on the −Z side with respect to the main body 710).
In this way, the accessory 400B is attached to the shoe seat 15 of the camera body 100 via the conversion device 700. The accessory 400B is fixed to the camera body 100 by mounting and fixing the connector 420 of the conversion device 700 to the shoe seat 15.

Here, the shoe seat 15B provided in the main body 710 of the conversion apparatus 700 will be described.
FIG. 10 is a plan view of the shoe seat 15B viewed from the + Z-axis direction.
The shoe seat 15B includes a bottom plate portion 21B, a top plate portion 22B, a side plate portion 23B disposed between the bottom plate portion 21B and the top plate portion 22B, and an opening 24B disposed between the bottom plate portion 21B and the top plate portion 22B. And a terminal portion 725 disposed on the bottom plate portion 21B.

  The bottom plate portion 21B is attached above the main body 710 of the conversion device 700 shown in FIG. 10 (+ Z axis side with respect to the main body 710). The bottom plate portion 21 is fixed above the main body 710 of the conversion device 700. In the present embodiment, the + Z-axis direction may be referred to as “upward”.

  The top plate portion 22B has a divided structure composed of two rectangles whose planar shape viewed from above (+ Z-axis direction) is separated in the X-axis direction and arranged symmetrically with respect to the Y-axis direction. The top plate portion 22B protrudes inward from the side plate portion 23B when viewed from above (+ Z-axis direction). The side plate portion 23B has a pair of inner walls extending in a predetermined direction (Y-axis direction) from the opening 24B. The pair of inner walls of the side plate portion 23B are disposed to face each other in a direction (X-axis direction) orthogonal to the extending direction (Y-axis direction) of the inner wall.

  The opening 24B is open toward the direction intersecting the direction (+ Z axis direction) from the bottom plate portion 21B to the top plate portion 22B. The opening 24B is open in a direction substantially parallel to the extending direction (Y-axis direction) of the inner wall of the side plate portion 23B. The size and shape of the opening 24B are set so that the connector 420B can be inserted.

  The terminal portion 725 has a plurality (five) of terminals Tb1, Tb4, Tb6, Tb8, and Tb9. The plurality of terminals of the terminal portion 725 are provided with terminals Tb4, Tb6, Tb8, and Tb9 on the surface of the bottom plate portion 21B. On the surface of the bottom plate portion 21B, the terminal Tb8 is provided at substantially the center of the surface of the bottom plate portion 21B, the terminals Tb4 and Tb6 are provided on the opening 24B side from the terminal Tb8, and the terminal Tb9 is viewed from the opening 24B. It is provided so as to be behind the terminal Tb8. The terminal Tb1 is a conductive (metal) region provided in any region of the bottom plate portion 21B, the side plate portion 23, and the top plate portion 22, and is a region insulated from the terminals Tb4, Tb6, Tb8, and Tb9. Is provided. The terminal Tb1 is a so-called ground terminal as will be described later.

  Of the plurality of terminals, terminals Tb1 and Tb8 are provided in accordance with the standard (JIS B7101). The terminals other than the terminals Tb1 and Tb8 are merely examples, and the number of terminals and the positions where the terminals are provided are not limited to the conditions shown in the figure, and are configured differently from the figure. It is also possible.

  The accessory 400B is attached to the shoe seat 15B by inserting the connector 420B into the opening 24B of the shoe seat 15B and sliding it in a predetermined direction (+ Y axis direction).

  FIG. 11 is a block diagram illustrating the configuration of accessories (the conversion device 700 and the accessory 400B) and the connection between the camera 10 and the accessory in the function expansion example 1 of the present embodiment.

  First, the configuration of the conversion device 700 will be described. The conversion device 700 includes a first switch unit 465B (MSW), a second switch unit 470 (PCSW), a function expansion setting unit 485 (EXSW), a terminal unit 723, and a terminal unit 725.

  The first switch unit 465B (MSW) includes a detection unit 465a that detects a state in which an accessory is attached to the shoe seat 15B of the conversion device 700, and a switch 465b that switches a conduction state according to the detected state. The detection unit of the first switch unit 465B (MSW) detects a state in which the accessory is attached to the shoe seat 15B, and switches the switch according to the detected state to block the circuit. The first switch unit 465B (MSW) conducts the circuit when detecting the state in which the accessory is attached to the shoe seat 15B. Further, the first switch unit 465B (MSW) blocks the circuit when detecting a state in which no accessory is mounted on the shoe seat 15B. When the first switch unit 465B (MSW) and the second switch unit 470B (PCSW) are connected in series and both are in a conductive state, a DET signal is sent to the camera 10. As described above, when the first switch unit 465B (MSW) and the second switch unit 470B (PCSW) are connected in series, the conversion device 700 and the accessory 400B are both attached to the camera. 10 can detect a state in which accessories are newly attached.

  When the first switch unit 465B (MSW) is provided without providing the second switch unit 470B (PCSW), the circuit is turned on when the state in which the accessory 400B is attached is detected, and the camera is turned on. It is also possible to send a DET signal to 10.

  The function expansion setting unit 485 (EXSW) corresponds to the function expansion setting unit 485 (EXSW) described above, and generates and outputs a function expansion setting signal Op indicating that the type of this accessory is the conversion device 700.

The terminal portion 723 includes terminals from terminals Ts1 to Ts10. The terminals from the terminals Ts1 to Ts10 correspond to the terminals having the same reference numerals in the accessory 400.
The terminal portion 725 includes terminals Tb1, Tb4, Tb6, Tb8, and Tb9.
The terminal Tb1 is provided corresponding to the ground terminals Ts1 and Ts2 and the reference potential terminals Ts3 and Ts5, and is connected to the terminal Ts1 via the reference potential line 480C. The terminal Tb4 is provided corresponding to the terminal Ts4, and is connected to the terminal Ts4 through a signal line. The terminal Tb6 is provided corresponding to the terminal Ts6, and is connected to the terminal Ts6 through a signal line. The terminal Tb9 is provided corresponding to the terminal Ts9, and is connected to the terminal Ts9 through a signal line.

  Next, the configuration on the accessory 400B side will be described. The accessory 400B in the function expansion example 1 of the present embodiment is operated by the power BPWR supplied from the built-in battery BAT2. The accessory 400 </ b> B can cause each component of the accessory 400 </ b> B to function by the power BPWR without receiving power from the camera 10.

  The accessory 400B includes a flash light emitting unit 430, an accessory control unit 440B, a nonvolatile memory 445, a power supply unit 450, a first pilot lamp 455, and a terminal unit 423B. As described above, the accessory 400B includes the battery BAT2.

Hereinafter, details of the accessory 400 </ b> B will be described focusing on differences from the accessory 400.
The terminal portion 423B includes terminals Tc1, Tc4, Tc6, Tc8, and Tc9.
The terminals Tc1, Tc4, Tc6, Tc8, and Tc9 in the terminal portion 423B are provided corresponding to the terminals Tb1, Tb4, Tb6, Tb8, and Tb9 in the terminal portion 725, respectively.

Further, the terminals Tc1, Tc4, Tc6, Tc8, and Tc9 in the terminal portion 423B correspond to the next terminals in the terminal portion 423 of the accessory 400 as follows.
The terminal Tc1 corresponds to the ground terminals Ts1 and Ts2 and the reference potential terminals Ts3 and Ts5 described above. The reference potential line 480B is connected to the terminal Tc1, and each part of the accessory 400B includes the reference potential line 480B. Is grounded.

The terminal Tc4 corresponds to the above-described synchronization signal terminal Ts4, and is connected to the accessory control unit 440B via a signal line. The terminal Tc6 corresponds to the communication signal terminal Ts6 described above, and is connected to the accessory control unit 440B via a signal line. The terminal Tc6 corresponds to the light emission control signal terminal Ts8 described above, and is connected to the accessory control unit 440B via a signal line. The terminal Tc9 is connected to the accessory control unit 440B via the signal control line Ts9. Pull-up resistors are provided on the signal lines connected to the terminals Ts6, Ts8, and Ts9, respectively. This pull-up resistor is electrically connected to the output side of the power supply unit 450. Therefore, the potentials (levels) at the terminals Ts4, Ts6, and Ts9 are maintained at the H level before being attached to the camera 10 and before starting communication with the camera 10, respectively.
The positive electrode of the battery BAT <b> 2 is connected to the power supply unit 450 and the flash light emitting unit 430. The negative electrode of the battery BAT2 is connected to the reference potential line 480B.
The power supply unit 450 includes a constant voltage circuit that stabilizes (constant voltage control) the voltage of the power supplied from the battery BAT2, and supplies the stabilized power to the accessory control unit 440B.

  Next, a connection relationship among the camera 10, the conversion device 700, and the accessory 400B will be described. In a state where the accessory 400B is attached to the camera 10 via the conversion device 700 (hereinafter referred to as an attached state), the terminal Tc1 is connected to the ground terminal Tp1 (Tp1) of the camera 10 via the terminal Tb1 and the ground terminal Ts1 (Ts2). Connected to Tp2). And the location (grounding terminal of the charging part 432) connected to these accessories 400B side terminals Tc1 in the mounted state is via the path via the grounding terminal Tp1 and the grounding terminal Ts1, and via the grounding terminal Tp2 and the grounding terminal Ts2. The battery BAT is connected to the ground line 43 through at least one of the above paths and to the negative electrode of the battery BAT in the camera 10. Therefore, the potentials of the ground terminals Ts1 and Ts2 and the locations connected to them are reference potentials corresponding to the potential of the negative electrode of the battery BAT in the mounted state.

  In the mounted state, the terminal Tc1 is connected to the reference potential terminal Tp3 (Tp5) of the camera 10 via the terminal Tb1 and the reference potential terminal Ts3 (Ts5).

  The function expansion setting terminal Ts10 is provided with the function expansion setting signal Op generated by the function expansion setting unit 485 via the function expansion setting terminal Tp10 when the conversion device 700 is mounted on the camera 10. The function expansion setting signal Op of the present embodiment is a signal that is sent including information indicating that the accessory does not require power feeding.

  The activation state providing terminal Ts7 is connected to the ground line 43 via the reference potential line 480C in a state where the accessory 400B is attached to the conversion device 700 and the conversion device 700 is attached to the camera 10. Therefore, when the accessory 400B is attached to the camera 10 via the conversion device 700 (hereinafter referred to as the first state), the camera control unit 170 indicates the activation detection level indicating the first state. DET (SGND level / reference potential level / Low level / L level) can be detected via the activation state providing terminal Ts7 and the activation state detection terminal Tp7. Further, the camera control unit 170 can detect the activation detection level DET that is electrically different from the first state in the following second state. The second state includes one of a state where the accessory 400B is not attached to the conversion device 700 and a state where the conversion device 700 is not attached to the camera 10.

  In the mounted state, the terminal Tc4 is connected to the synchronization signal terminal Tp4 of the camera 10 via the terminal Tb4 and the synchronization signal terminal Ts4. That is, the accessory control unit 440B is connected to the camera control unit 170 via the terminal Tc4, the terminal Tb4, the synchronization signal terminal Tp4, and the synchronization signal terminal Ts4 in the mounted state.

  In the mounted state, the terminal Tc6 is connected to the communication signal terminal Tp6 of the camera 10 via the terminal Tb6 and the communication signal terminal Ts6. That is, the accessory control unit 440B is connected to the camera control unit 170 via the terminal Tc6, the terminal Tb6, the communication signal terminal Tp6, and the communication signal terminal Ts6 in the mounted state.

  In the mounted state, the terminal Tc9 is connected to the communication control signal terminal Tp9 of the camera 10 via the terminal Tb9 and the communication control signal terminal Ts9. That is, the accessory control unit 440B is connected to the camera control unit 170 through the terminal Tc9, the terminal Tb9, the communication control signal terminal Tp9, and the communication control signal terminal Ts9 in the mounted state.

In the mounted state, the terminal Tc8 is connected to the light emission control signal terminal Tp8 of the camera 10 via the terminal Tb8 and the light emission control signal terminal Ts8. That is, the accessory control unit 440B is connected to the camera control unit 170 through the terminal Tc8, the terminal Tb8, the light emission control signal terminal Tp8, and the light emission control signal terminal Ts8 in the mounted state.
In this way, in the camera system 1 shown as the function expansion example 1, the accessory control unit 440B connected as described above can be caused to function in the same manner as the accessory control unit 440 of the accessory 400 with respect to the camera control unit 170. it can.

(Function Extension Example 2: Configuration Including Camera 10 and Display Device 900)
Subsequently, a function expansion example 2 will be described.
FIG. 12 is a diagram illustrating an appearance of the camera system 1 in the function expansion example 2 of the present embodiment.
The camera system 1 shown in this figure includes a camera 10 (camera body 100 and photographing lens 200) and a display device 900.
First, the display device 900 will be described. The display device 900 is an embodiment of a display device provided as an external device in the camera system 1. The display device 900 shown in this figure is a so-called “electronic viewfinder”.
The display device 900 shown in FIG. 12 includes a display device body 910 and a connector 420. The display device main body 910 accommodates various electrical components. The connector 420 is provided below the display device main body 910. The connector 420 can be attached to and detached from the shoe seat 15 of the camera body 100.

The display device 900 is different from the accessory 400 described above in electrical specifications with the camera body 100.
In the display device main body 910 of the display device 900, a connector 420 for mounting the display device 900 to the camera 10 is disposed below the display device main body 910 (on the −Z side with respect to the display device main body 910). In this way, the display device 900 is mounted on the shoe seat 15 of the camera body 100 and fixed to the camera body 100.
Note that an eyepiece unit 990 is provided on the back side of the display device main body 910 (the −Y side with respect to the display device main body 910). The eyepiece unit 990 includes an eyepiece optical system for viewing an image displayed by the display unit 980 (FIG. 13) provided inside the display device main body 910.

FIG. 13 is a block diagram illustrating the configuration of the accessory (display device 900) and the connection between the camera 10 and the accessory in the function expansion example 2.
First, the display device 900 will be described.
In this figure, the display device 900 includes a power supply unit 950, a display unit 980, a receiving unit 930, a display driving unit 940, a first switch unit 465 (MSW), and a second switch unit 470 (PCSW), and a function expansion setting unit 485. (EXSW).

The power supply unit 950 includes a constant voltage circuit that stabilizes the voltage of power supplied from the camera 10 (constant voltage control). The power supply unit 950 supplies power whose voltage is stabilized by a constant voltage circuit to each unit in the display device. The power supply unit 950 has a ground terminal connected to the reference potential line 480 (SGND), an input terminal connected to the power supply terminals Tp11 and Tp12, and an output terminal connected to each part in the display device 900.
The display unit 980 includes a display element such as an LCD, and displays display information included in a display signal supplied from the camera 10.

The receiving unit 930 performs level conversion of the display signal (TxP / TxN) supplied from the camera 10. The receiving unit 930 has two input terminals, which are connected to the display signal terminal Tp4 ′ and the display signal terminal Tp6 ′, respectively.
The display driving unit 940 controls the display state of the image displayed on the display unit 980 according to the control information from the camera 10. For example, the display driving unit 940 performs display control such as lighting, brightness adjustment, and extinguishing of the display unit 980, and processing for causing the display unit 980 to display image data output from the camera control unit 170. The display drive unit 940 has an input terminal to which a display signal is input connected to the reception unit 930 and an output terminal connected to an input terminal of the display unit 980. In the display driver 940, control system signal terminals to which a display control signal (DATA) and a CLK signal are input are connected to a CLK terminal Tp8 ′ and a DATA terminal Tp9 ′, respectively.

The terminal portion 423 corresponds to the terminal portion 423 in the accessory 400 and includes a plurality of terminals that come into contact with the terminals included in the terminal portion 25 of the camera 10.
The function expansion setting unit 485 (EXSW) corresponds to the function expansion setting unit 485 (EXSW) described above, and generates and outputs a function expansion setting signal Op indicating that the type of the accessory is the display device 900.

  Note that the camera 10 in the second function expansion example 2 detects the function expansion setting signal Op and specifies that the type of the accessory is the display device 900. Thereby, a signal different from the case of the accessory 400 or the conversion device 700 is assigned to the signal supplied from the terminal unit 25. In short, as a signal assigned to the terminal unit 25, a signal for causing the display device 900 to function is assigned. In this allocation change, the camera control unit 170 changes the signal allocation to each terminal as follows. As described above, terminals to which signals to be assigned are different are the fourth terminal, the sixth terminal, the eighth terminal, and the ninth terminal. The camera control unit 170 makes the fourth terminal (display signal terminal Tp4 ') a terminal for outputting a display signal from the camera 10 to the accessory side. The camera control unit 170 sets the sixth terminal (display signal terminal Tp6 ′) to output a display signal from the camera 10 to the accessory side. The camera control unit 170 uses the eighth terminal (CLK terminal Tp8 ') as a terminal that outputs a timing signal when sending information to the display driving unit 940 (FIG. 13) of the display device 900. The camera control unit 170 uses the ninth terminal (DATA terminal Tp9 ') as a terminal for outputting a data signal when sending information to the display driving unit 940 (FIG. 13) of the display device 900.

As described above, the camera system 1 according to the present embodiment may be functionally expanded so as to perform processing of different functions depending on the type of accessory attached to the camera 10. Hereinafter, a procedure of processing for realizing function expansion in the camera system 1 will be described.
In the following description, the same processing is denoted by the same reference numeral, and the description thereof may be simplified or omitted.

  FIG. 14 is a flowchart illustrating a processing procedure in the camera system. The camera system 1 performs a series of processes (activation sequence) for activating an accessory that is mounted on the camera 10. In the startup sequence (step S1), the camera system 1 performs a series of processing (communication preparation sequence) for preparing communication between the camera 10 and the accessory. In this process, information for specifying the type of accessory is obtained from the accessory to generate accessory type information (step S2). The camera system 1 communicates information necessary for imaging between the camera control unit 170 and the accessory control unit 440 (or 440B) or the display drive unit 940 after completion of the communication preparation sequence in the startup sequence. A series of processing (initial communication sequence) is performed according to the specified type of accessory. As described above, depending on the type of accessory, there are accessories that do not require power supply from the camera 10 and accessories that are assigned to the terminals 25 provided on the shoe seat 15. The camera system 1 performs an initialization process (initial communication sequence) in accordance with the accessory type information generated in the preceding step S2 (step S3). The camera system 1 can be updated between the camera control unit 170 and the accessory control unit 440 (or 440B) or the display drive unit 940 so that the information changed due to the setting change or the like can be updated after the initial communication sequence ends. A series of processes (stationary communication sequence) for communicating with each other is performed (step S4).

The camera control unit 170 performs a determination process for determining whether or not there is an interrupt request after the end of the steady communication sequence (step S5). When it is determined in step S5 that there is no interrupt request (step S5; No), the camera system 1 performs the steady communication sequence again.
If the camera system 1 determines in step S5 that there is an interrupt request (step S5; Yes), the camera system 1 performs an interrupt process (step S6). The interrupt process is a series of processes included in the shooting sequence, for example. The camera system 1 performs the process of the steady communication sequence again after the interruption process is completed. That is, the camera system 1 does not perform the steady communication sequence process in the shooting sequence.

  Next, a communication preparation sequence will be described. The camera system 1 detects whether an accessory is attached to the camera body 100 in the communication preparation sequence. When an accessory is attached to the camera body 100, the camera system 1 obtains information for identifying the type of attached accessory from the accessory. The camera system 1 starts supplying power to the accessory as necessary according to the information obtained from the accessory, and the camera body 100 notifies the accessory that communication is permitted. Hereinafter, an example of a processing flow in the communication preparation sequence will be described.

FIG. 15 is a diagram illustrating a processing procedure in the communication preparation sequence.
In the following description, as described above, a case will be described in which information indicating the type of accessory is given according to the signal level of the function expansion setting signal Op. Information indicating the type of accessory provided from the accessory is information detected by the camera control unit 170 based on the function expansion setting signal Op supplied to the function expansion setting terminal Tp10.

  The signal level of the activation detection level DET is the L (low) level when the accessory 400 or the display device 900 is attached to the camera 10 and the second switch unit 470 closes the circuit ("ON" position). become. Alternatively, the signal level of the activation detection level DET becomes the L (low) level when the accessory 400B is attached to the conversion device 700 and the conversion device 700 is attached to the camera 10 (step S101).

  Next, the camera control unit 170 performs a determination process for determining whether or not the activation detection level DET is the L level (step S102). If the camera control unit 170 determines in step S102 that the activation detection level DET is not the L level (step S102; No), the camera control unit 170 determines that the accessory is not attached to the camera 10 and determines in step S102. Repeat the process.

When the camera control unit 170 determines in step S102 that the activation detection level DET is the L level (step S102; Yes), the camera control unit 170 controls the accessory power supply control unit 33 so that the camera 10 can access the accessory. Power supply to the accessory power supply control unit 33 is started (step S103). The accessory control unit 440 or the display driving unit 940 is activated by the power supplied from the camera 10. (Note that the accessory control unit 440B is activated by the power supplied from the battery BAT2.) Further, the function expansion setting unit 485 receives the function expansion setting signal Op via the function expansion setting terminal Tp10 and the function expansion setting terminal Ts10. To the camera control unit 170.
The camera control unit 170 detects a function expansion setting signal Op obtained from the function expansion setting terminal Tp10. For example, the camera control unit 170 detects the signal level of the function expansion setting signal Op supplied to the function expansion setting terminal Tp10 (step S104).
The camera control unit 170 determines whether the accessory requires power supply based on the detected function expansion setting signal Op. For example, the camera control unit 170 determines whether the accessory requires power supply based on a result of determining whether the signal level of the function expansion setting signal Op is equal to or higher than a predetermined threshold level ( Step S105).
If it is determined in step S105 that the accessory does not require power supply (step S105: No), the camera control unit 170 stores the determination result in the storage unit 158 and the accessory power supply control unit. 33, the power supply from the camera 10 to the accessory is stopped by the accessory power supply control unit 33, and the process proceeds to step S107 (step S106).

On the other hand, when it is determined by the determination in step S105 that the accessory needs power supply (step S105: Yes), the camera control unit 170 stores the determination result in the storage unit 158 and detects it. It is determined whether or not the accessory is the display device 900 (step S107).
If it is determined in step S107 that the detected accessory is the display device 900 (step S107: Yes), the camera control unit 170 stores the determination result in the storage unit 158 and is provided in the shoe seat 15. The function of each terminal of the terminal unit 25 is assigned to the function (specification) as the display device 900, and the process proceeds to step S111 (step S108).

  If it is determined in step S107 that the detected accessory is not the display device 900 (step S107: No), the camera control unit 170 stores the determination result in the storage unit 158 and is provided in the shoe seat 15. The function of each terminal of the terminal section 25 is assigned as a standard function (specification), and the process proceeds to step S111. The assignment as a standard function (specification) is, for example, assignment applied to the accessory 400 (lighting device), GPS device, conversion device, etc., and excludes assignment applied to the display device (step S109). ).

  The camera control unit 170 notifies the accessory of communication permission after the end of the control in step S109 when the accessory is the accessory 400 or after the end of the control in step S108 when the accessory is the display device 900 ( Step S111). The potential of the communication control signal terminal Tp9 of the camera 10, that is, the signal level of the communication control signal Cs is L level in a state where the camera control unit 170 determines that the accessory is not attached to the camera 10.

  The accessory control unit 440 (440B) or the display driving unit 940 performs determination processing for determining whether or not the potential of the communication control signal terminal Ts9, that is, the signal level of the communication control signal Cs is H level (step S112). ). When the accessory control unit 440 (440B) or the display drive unit 940 determines in step S112 that the communication control signal Cs is not at the H level (step S112; No), the determination process of step S112 is performed again. When the accessory control unit 440 (440B) or the display drive unit 940 determines in step S112 that the communication control signal Cs is at the H level (step S112; Yes), communication with the camera control unit 170 is permitted. Recognize that

  In this communication preparation sequence, the camera control unit 170 raises the communication control signal Cs to H level in step S111 to notify communication permission, and the accessory control unit 440 in the accessory 400 or the accessory control unit 440B in the accessory 400B or the display device 900. After the display driving unit 940 recognizes that the communication with the camera control unit 170 is permitted, the process ends.

As described above, the camera system 1 determines the function range when the accessory is combined with the camera 10 based on the activation detection level DET output from the accessory and the function expansion setting signal Op indicating the type of the accessory. The camera system 1 can extend functions corresponding to accessories from standard functions. Moreover, since the camera 10 starts supply of the electric power to an accessory according to the determination result, the reliability of the control which supplies electric power to an accessory becomes high.
In addition, the camera system 1 notifies the communication permission after the camera control unit 170 starts supplying power to the accessory. Thereby, in the camera system 1, the accessory control unit (accessory control unit 440 or the like) receives a notification of communication permission in a state where the accessory (accessory 400 or the like) is activated, and the camera 10 and the accessory (accessory 400 or the like). ) Can be stably controlled. As described above, the camera system 1 is a highly convenient system because it can stably control accessories (such as the accessory 400) and operates stably.

(Second Embodiment)
With reference to FIG. 1 to FIG. 14 and FIG. 16, processing in a communication preparation sequence different from the first embodiment will be described.
FIG. 16 is a diagram illustrating a processing procedure in the communication preparation sequence.
The camera control unit 170 obtains information indicating the type of accessory provided from the accessory as the function expansion setting signal Op from the function expansion setting terminal Tp10. In the communication preparation sequence in the present embodiment, it is necessary to obtain the function expansion setting signal Op from the accessory before the camera 10 starts to supply power to the accessory. For example, information indicating the type of accessory is given according to the signal level of the function expansion setting signal Op, and the camera control unit 170 can be realized by determining the signal level of the function expansion setting terminal Tp10. .
In the following description, as described above, the processing when the function expansion setting signal Op is given information indicating the type of accessory according to the signal level will be described.

  The signal level of the activation detection level DET is the L (low) level when the accessory 400 or the display device 900 is attached to the camera 10 and the second switch unit 470 closes the circuit ("ON" position). become. Alternatively, the signal level of the activation detection level DET becomes the L (low) level when the accessory 400B is attached to the conversion device 700 and the conversion device 700 is attached to the camera 10 (step S101).

  Next, the camera control unit 170 performs a determination process for determining whether or not the activation detection level DET is the L level (step S102). When it is determined in step S102 that the activation detection level DET is not the L level (step S102; No), the camera control unit 170 determines that the accessory 400 is not attached to the camera 10, and the process of step S102 is performed. The determination process is performed again.

When the camera control unit 170 determines in step S102 that the activation detection level DET is the L level (step S102; Yes), the camera control unit 170 detects the function expansion setting signal Op obtained from the function expansion setting terminal Tp10. To do. For example, the camera control unit 170 detects the signal level of the function expansion setting signal Op supplied to the function expansion setting terminal Tp10 (step S104B).
The camera control unit 170 determines whether the accessory requires power supply based on the detected function expansion setting signal Op. For example, the camera control unit 170 determines whether the accessory requires power supply based on a result of determining whether the signal level of the function expansion setting signal Op is equal to or higher than a predetermined threshold level ( Step S105).
If it is determined in step S105 that the accessory does not require power supply (step S105: No), the camera control unit 170 stores the determination result in the storage unit 158 and proceeds to step S111B. .

On the other hand, when it is determined by the determination in step S105 that the accessory needs power supply (step S105: Yes), the camera control unit 170 stores the determination result in the storage unit 158 and detects it. It is determined whether or not the accessory is the display device 900 (step S107B).
If it is determined in step S107B that the detected accessory is the display device 900 (step S107B: Yes), the camera control unit 170 stores the determination result in the storage unit 158 and is provided in the shoe seat 15. The function of each terminal of the terminal unit 25 is assigned to the function (specification) as the display device 900, and the process proceeds to step S110 (step S108B).

  If it is determined in step S107B that the detected accessory is not the display device 900 (step S107B: No), the camera control unit 170 stores the determination result in the storage unit 158 and is provided in the shoe seat 15. The machine of each terminal of the terminal part 25 is assigned as a standard function (specification). The allocation as a standard function (specification) is, for example, an allocation applied to the accessory 400 (lighting device), the GPS device, the conversion device, etc., and excludes the allocation applied to the display device (step S109B). ).

In accordance with the results set in step S108B and step S109B, the camera control unit 170 performs control for starting power supply from the camera 10 to the accessory.
For example, the camera control unit 170 controls the accessory power supply control unit 33 to cause the accessory power supply control unit 33 to start supplying power from the camera 10 to the accessory (step S110).
In the case where the accessory is the accessory 400, in the accessory 400, the accessory control unit 440 is supplied from the camera 10 via the power supply unit (first power supply unit 450-1 and second power supply unit 450-2). It starts by power.
Alternatively, when the accessory is the display device 900, in the display device 900, the display drive unit 940 is activated by the power supplied from the camera 10 via the power supply unit (power supply unit 950). Note that if the accessory is the display device 900, the camera control unit 170 ends the communication preparation sequence without performing the following processing after step S111B.

  When the accessory is the accessory 400, the camera control unit 170 does not require the accessory to supply power as a result of the determination in step S105 after the control of step S110 ends or when the accessory is the conversion device 700. If it is determined (step S105: No), the accessory is notified of communication permission (step S111B). The potential of the communication control signal terminal Tp9 of the camera 10, that is, the signal level of the communication control signal Cs is L level in a state where the camera control unit 170 determines that the accessory is not attached to the camera 10.

  The accessory control unit 440 (440B) or the display driving unit 940 performs determination processing for determining whether or not the potential of the communication control signal terminal Ts9, that is, the signal level of the communication control signal Cs is H level (step S112). ). When the accessory control unit 440 (440B) or the display drive unit 940 determines in step S112 that the communication control signal Cs is not at the H level (step S112; No), the determination process of step S112 is performed again. When the accessory control unit 440 (440B) or the display drive unit 940 determines in step S112 that the communication control signal Cs is at the H level (step S112; Yes), communication with the camera control unit 170 is permitted. Recognize that

  In this communication preparation sequence, the camera control unit 170 raises the communication control signal Cs to H level in step S111 to notify communication permission, and the accessory control unit 440 in the accessory 400 or the accessory control unit 440B in the accessory 400B or the display device 900. After the display driving unit 940 recognizes that the communication with the camera control unit 170 is permitted, the process ends.

As described above, the camera system 1 functions when the accessory is combined with the camera 10 based on the activation detection level DET output from the accessory (accessory 400, 400B, etc.) and the function expansion setting signal Op indicating the type of accessory. Determine the range. The camera system 1 can extend functions corresponding to accessories from standard functions. Moreover, since the camera 10 starts supply of the electric power to an accessory according to the determination result, the reliability of the control which supplies electric power to an accessory becomes high.
In addition, the camera system 1 notifies the communication permission after the camera control unit 170 starts supplying power to the accessory. Thereby, in the camera system 1, the accessory control unit (accessory control unit 440 or the like) receives a notification of communication permission in a state where the accessory (accessory 400 or the like) is activated, and the camera 10 and the accessory (accessory 400 or the like). ) Can be stably controlled. As described above, the camera system 1 is a highly convenient system because it can stably control accessories (such as the accessory 400) and operates stably.

(1) According to the present embodiment, in the camera 10, the terminal portion 25 (connection portion) is provided with a plurality of terminals (each terminal from Tp1 to Tp12) connected to the accessory, A plurality of terminals (terminals from Tp1 to Tp12) include a terminal (first terminal) having a code Tp10. The camera control unit 170 identifies the type of accessory according to the signal state of the terminal (first terminal) denoted by reference numeral Tp10.
As a result, the camera 10 can identify the type of accessory, and can perform control according to the type of accessory, thereby providing a highly convenient camera without malfunction.

(2) Further, according to the present embodiment, the camera control unit 170 controls whether or not to supply power to the accessory according to the signal state of the terminal (first terminal) denoted by reference numeral Tp10.
Accordingly, the camera 10 can identify the type of accessory, and can supply power to the accessory according to the type of accessory. Therefore, it is possible to provide a highly convenient camera without malfunction.

(3) Further, according to the present embodiment, a plurality of terminals (each terminal from Tp1 to Tp12) of the terminal unit 25 (connecting unit) include a terminal (first terminal) denoted by Tp10, Tp4, At least one of the terminals Tp6, Tp8, and Tp9 (second terminal) is included. The camera control unit 170 sets a signal to be assigned to at least one of the terminals Tp4, Tp6, Tp8, and Tp9 (second terminal) according to the signal state of the terminal Tp10 (first terminal).
Thus, the camera 10 can identify the type of accessory, and can change the allocation of signals provided to the accessory according to the type of accessory. A highly functional camera can be provided.

(4) Further, according to the present embodiment, the plurality of terminals of the terminal portion 25 (connection portion) includes a plurality of terminals (second terminals) among the signs Tp4, Tp6, Tp8, and Tp9. The camera control unit 170 assigns a signal assigned to each of a plurality of terminals (second terminals) among the codes Tp4, Tp6, Tp8, and Tp9 from a plurality of predetermined signals. The terminal is selected according to the signal state of the terminal.
Thereby, the camera 10 can generate | occur | produce the signal according to the kind of accessory. Further, since the camera 10 can identify the type of accessory and select a signal to be provided to the accessory according to the type of accessory, it is possible to provide a highly convenient camera without malfunction.

(5) Moreover, according to this embodiment, the signal which detects the state in which the accessory was connected is supplied to the some terminal (code | symbol Tp1 to Tp12) of the terminal part 25 (connection part). A terminal denoted by Tp7 (third terminal) and a terminal denoted by Tp10 (first terminal) are included. The camera control unit 170 selects a process according to the type of accessory based on the signal state of the terminal (first terminal) with the symbol Tp10 and the signal state of the terminal (third terminal) with the symbol Tp7.
As a result, the camera 10 can obtain a signal for identifying the type of accessory and a signal indicating the wearing state from different terminals, and can perform control according to the type of accessory. A highly convenient camera can be provided.

(6) Further, according to the present embodiment, the camera control unit 170 determines the type of the accessory connected to the connection unit before determining whether or not to supply power to the accessory. 1 terminal) is identified according to the voltage.
As a result, the camera 10 can determine whether or not to supply power to the accessory after identifying the type of accessory from the voltage of the terminal (first terminal) denoted by reference symbol Tp10, depending on the type of accessory. Therefore, it is possible to provide a convenient camera without malfunction.

(7) According to the present embodiment, in the accessory (any one of the accessory 400, the conversion device 700, and the display device 900) connected to the camera 10, the terminal portion 723 (first connection portion) is connected. Are provided with a terminal Ts10 (first connection terminal) connected to a terminal Tp10 (first connection terminal) of the camera 10. The function expansion setting unit 485 (first setting unit) sets the voltage corresponding to the signal indicating the type of accessory as the voltage of the terminal (first connection terminal) indicated by the symbol Ts10.
An accessory (any one of the accessory 400, the conversion device 700, and the display device 900) connected to the camera 10 is a terminal provided in the terminal portion 723 (first connection portion), and A terminal (first connection terminal) with a symbol Ts10 connected to a terminal (first connection terminal) with a symbol Tp10 is provided. The function expansion setting unit 485 (first setting unit) uses the voltage indicating the type of the accessory as the voltage of the terminal (first connection terminal) indicated by the symbol Ts10, so that the accessory (accessory 400, conversion device 700, display device 900) Any one of them) can provide the camera 10 with information indicating the type of accessory as the voltage at the terminal. Thereby, there is no malfunction and it is possible to provide a convenient accessory.

(8) Moreover, according to this embodiment, the converter 700 is provided with the terminal part 725 (2nd connection part) provided with the terminal connected to another accessory (for example, accessory 400B).
Thereby, since the conversion apparatus 700 can connect another accessory to the terminal part 725 which connects another accessory, it comes to be able to connect another accessory to the camera 10. FIG. Thereby, the accessory (conversion apparatus 700) with no malfunction and high convenience can be provided.

(9) Further, according to the present embodiment, in the conversion device 700, the detection unit 465a (connection state detection unit) of the first switch unit 465B is connected to the terminal unit 725 (second connection) by another accessory (for example, the accessory 400B). Detects the state of connection to the connection unit. The switch 465b (second setting unit) of the first switch unit 465B has a code Ts7 provided in the terminal unit 723 (first connection unit) according to the result detected by the detection unit 465a (connection state detection unit). A signal (voltage) to be supplied to the terminal (third connection terminal) is set.
Thereby, the converter 700 detects the state in which another accessory (for example, the accessory 400B) is connected to the terminal unit 725 (second connection unit), and then converts the voltage of the terminal (third connection terminal) with the symbol Ts7. The voltage indicating the wearing detection state can be set.

(10) According to the present embodiment, the accessory is an adapter (conversion device 700) that connects another accessory to the camera 10.
As a result, other accessories can be connected to the camera 10.

  In the present embodiment, the numbers indicating the arrangement of the terminals are numbers that increase in order from one side (+ X side) to the other side (−X side) in the terminal arrangement direction (X-axis direction). The numbers may be ascending from the other side (−X side) to one side (+ X side). In this case, in the terminal arrangement of the terminal portion 25, the first and second terminals are the power supply terminal Tp12 and the power supply terminal Tp11, respectively, and the eleventh and twelfth terminals are the ground terminal Tp2 and the ground terminal Tp1, respectively. It becomes. Further, the above-described modification relating to the arrangement of the plurality of terminals in the terminal portion 25 of the camera body 100 can be applied to the arrangement of the plurality of terminals in the terminal portion 423 of the accessory 400.

  One of the power supply terminal Tp11 and the power supply terminal Tp12 may be omitted. The power supply terminal Tp11 and the power supply terminal Tp12 may be integrated. Similarly to the power supply terminal Tp11 and the power supply terminal Tp12, one of the ground terminal Tp1 and the ground terminal Tp2 may be omitted. The ground terminal Tp1 and the ground terminal Tp2 may be integrated. Further, terminals arranged between a power supply terminal including at least one of the power supply terminal Tp11 and the power supply terminal Tp12 and a ground terminal including at least one of the ground terminal Tp1 and the ground terminal Tp2 are denoted by reference numerals Tp3 to Tp10. One of the terminals, two or more, or all of the terminals may be used.

  As described above, the camera system 1 performs a process (the above-described end process) necessary for ending the process of the accessory 400 when the user tries to remove the accessory 400 from the camera 10, for example. It is a highly convenient system that can save settings and history.

The technical scope of the present invention is not limited to the above embodiment. At least one of the components described in the above embodiments may be omitted. The components described in the above embodiments can be combined as appropriate.
For example, when the accessory 400 is attached to the camera 10, the activation state providing terminal Ts 7 is connected to the reference potential line 480 via the MSW 465 and the PCSW 470 so as to be connected to the ground line 42 via the reference potential line 480. May be.

  The camera body 100, the accessories 400 and 400B, and the display device 900 described above have a computer system therein. The operation process of each functional unit is stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer system reading and executing the program. Here, the computer system includes a CPU, various memories, an OS, and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it also includes those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or client in that case. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

DESCRIPTION OF SYMBOLS 1 ... Camera system, 10 ... Camera, 15 ... Shoe seat (accessory shoe), 25 ... Terminal part, 400, 400B ... Accessory, 422 ... Locking claw (movable member) 423 ... terminal unit, 424 ... first operation unit, 430 ... flash light emitting unit (light emitting unit), 435 ... illumination light emitting unit (light emitting unit), 440 ... accessory control unit, 465 ... 1st switch part, 470 ... 2nd switch part, 475 ... Level switching part, 485 ... Function expansion setting part, 700 ... Conversion apparatus, 900 ... Display apparatus, 940 ... Display drive unit, Tp1 ... Ground terminal, Tp2 ... Ground terminal, Tp3 ... Reference potential terminal, Tp4 ... Clock signal (synchronization signal) terminal, Tp5 ... Reference potential terminal, Tp6 ... Communication signals (data signals) Child, Tp7 ... activation state detection terminal, Tp8 ... light emission control signal terminal, Tp9 ... communication control signal terminal, Tp10 ... function expansion setting terminal, Tp11 ... power supply terminal, Tp12 ... power supply Terminal, Ts1 ... ground terminal, Ts2 ... ground terminal, Ts3 ... reference potential terminal, Ts4 ... clock signal (synchronization signal) terminal, Ts5 ... reference potential terminal, Ts6 ... communication signal (Data signal) terminal, Ts7... Start state providing terminal, Ts8... Light emission control signal terminal, Ts9... Communication control signal terminal, Ts10... Function expansion setting terminal, Ts11. ... Power supply terminals
CLK: synchronization signal, DET: activation detection level, DATA: communication signal (data signal), PWR: power, PGND: reference potential, SGND: reference potential, X ... Light emission control signal

Claims (12)

A camera to which accessories are connected,
A plurality of terminals connected to the accessory are provided, and the plurality of terminals include a connection portion including a first terminal;
A camera comprising: a camera control unit that identifies a type of the accessory according to a signal state of the first terminal. The camera control unit
The camera according to claim 1, wherein whether or not to supply power to the accessory is controlled according to a signal state of the first terminal. In the plurality of terminals of the connection portion,
The first terminal and the second terminal are included;
The camera control unit
The camera according to claim 1 or 2, wherein a signal assigned to the second terminal is set according to a signal state of the first terminal. In the plurality of terminals of the connection portion,
A plurality of the second terminals;
The camera control unit
4. The camera according to claim 3, wherein a signal assigned to each of the second terminals is selected from a plurality of predetermined signals according to a signal state of the first terminal. 5. In the plurality of terminals of the connection portion,
A third terminal to which a signal for detecting a state in which the accessory is connected is supplied and the first terminal;
The camera control unit
The process according to the type of the accessory is selected based on the signal state of the first terminal and the signal state of the third terminal. 5. camera. The camera control unit
The type of the accessory connected to the connection part is identified according to the voltage of the first terminal before determining whether or not to supply power to the accessory. Any one of the cameras. A camera to which accessories are connected,
A plurality of terminals connected to the accessory are provided, and the plurality of terminals include a connection portion including a first terminal;
A camera comprising: a camera control unit that identifies a type of the accessory according to a signal provided to the first terminal. An accessory connected to the camera according to claim 1,
A first connection portion provided with a first connection terminal connected to the first terminal of the camera;
A first setting unit that supplies a signal indicating a type of the accessory to the first connection terminal. The accessory according to claim 8, further comprising: a second connection portion provided with a terminal connected to another accessory. A connection state detection unit for detecting a state in which the other accessory is connected to the second connection unit;
A second setting unit that sets a signal to be supplied to a third connection terminal provided in the first connection unit according to a result detected by the connection state detection unit. Accessories listed. The accessory according to claim 9, wherein the accessory is an adapter that connects the other accessory to the camera. To the computer equipped with the camera to which the accessory is connected,
The program for performing the step which identifies the classification of the said accessory connected to the said connection part according to the signal state of the 1st terminal among the several terminals provided in the connection part to which an accessory is connected.

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