JPH05107611A - Imaging device - Google Patents

Abstract

(57) [Abstract] [Purpose] The applicant has proposed a single-lens reflex camera system in which not only the camera body but also accessories such as an interchangeable lens have a built-in battery. In such a camera system, an effective operation control system for both batteries is required in order to effectively use both batteries. An object of the present invention is to provide an imaging device (camera system) having an effective operation system for a plurality of batteries and an accessory discriminating means. According to another aspect of the present invention, there is provided an image pickup apparatus having a detection unit that constantly detects the current capacities of both batteries in order to effectively operate the batteries in the camera body and the batteries in accessories. On the other hand, whether to operate either one of the two batteries independently or to operate the both batteries together is automatically determined according to the state at that time. Further, accessory type discriminating means for determining whether or not the accessory has a built-in battery is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image taking apparatus constructed so that various kinds of accessories can be attached to the image taking apparatus body, and in particular, a shake prevention device is detachably attached to the image taking apparatus body as an accessory. And a camera system configured as described above.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a control device for preventing image blur of an optical system such as a camera, that is, suppressing image vibration due to camera shake to stabilize an image. This is generally composed of a sensor that detects vibration and a correction system that performs correction so as to prevent image blurring in response to a signal from the sensor.

These control devices detect camera shake vibration (usually, tilt vibration around two axes perpendicular to the photographing optical axis) as an acceleration signal, a velocity signal, or a displacement signal by a sensor, and detect these signals. The signal processing system is configured to perform integration, if necessary, to convert into a displacement signal or a velocity signal, and drive the lens system in the vibration suppressing direction depending on the converted signal.

When performing optical correction, the correction system is constructed so as to swing the optical system in the radial direction or rotate about two axes perpendicular to the photographing optical axis, thereby forming an image formed. A feedback system control mechanism that suppresses vibration is configured.

When such an image blur prevention device is applied to a single-lens reflex camera, the image blur prevention device is built in the interchangeable lens side or in the form of an adapter inserted between the body and the lens.

FIG. 20 shows an example of a control device for such an image blur prevention device. In FIG. 20, reference numeral 1 denotes an angular accelerometer, which is attached to the photographing optical axis of the imaging optical system 4 due to camera shake or the like. The angular acceleration about the orthogonal axes is detected and output as the angular acceleration signal a. The angular acceleration signal a is integrated into the velocity signal v by the first integrator 2 and further converted into the displacement signal d by the second integrator 3. 5 is an actuator,
The image forming system 4 provided so as to be movable in the radial direction to prevent image blur is operated to be controlled in the radial direction by inputting the displacement signal d.

Reference numeral 6 is a variable resistor as a position detecting means for detecting the actual displacement of the image forming system 4. The signal from this position detecting means is fed back to the input system of the actuator 5 to form an image forming system. A local feedback loop that makes the drive amount of No. 4 correspond to the vibration displacement is configured.
Reference numeral 7 is an operational amplifier provided between the integrator 3 and the actuator 5.

In a single-lens reflex camera, the image photographed on the film surface and the image observed by the finder are obtained through the same photographing lens. Therefore, by incorporating an anti-shake device in the taking lens, the anti-shake effect can be obtained not only during the exposure period but also while the photographer is looking through the finder to decide the composition. For example, 300m
When using a telephoto lens with a focal length of m or more, it is very difficult to stabilize the viewfinder image in the handheld state, but if you use an image stabilizer, you can easily stabilize the viewfinder image. It is convenient to decide the composition of time. In addition, maneuverability is not impaired as when using a tripod.

However, in this way, if it is attempted to obtain the blurring prevention effect even when observing the viewfinder image, the power consumption increases as compared with the case where the image blurring prevention device is operated only during the exposure. This is because the actuator of the anti-shake device needs to continue operating during observation of the finder image. Therefore, when power is supplied to the anti-shake device from the camera body side, the power supply in the camera body is immediately consumed. Therefore, if power is supplied from the body side to the image blur prevention device inside the lens, the power consumption of the image blur prevention device consumes the power inside the body when you want to shoot, and you can not shoot at all. There are problems such as being lost.

In order to avoid this, it is possible to mount many batteries on the body side to increase the power supply capacity, but the general interchangeable lens on the market does not have a built-in anti-shake device. However, increasing the power supply capacity on the body side is over spec for many interchangeable lenses, and also increases the weight on the body side.

As a solution to such a problem, the present applicant has proposed Japanese Patent Application No. 3-89125.

In this proposal, a power source for supplying power only to the image blur prevention device is provided on the lens side including the image blur prevention device separately from the main body of the image taking apparatus.

According to this proposal, the power required for zooming, focusing, and diaphragm driving during shooting is supplied from the body side, and the power inside the lens is used only for the operation of the anti-shake device. For this reason, even if the power inside the lens is consumed due to the shake prevention device that consumes a large amount of power, the zooming, focusing, and diaphragm drive that affect shooting are operated by the power supply on the body side, so shooting is not possible. It never becomes impossible. Even when the power inside the lens is turned off or the power is removed from the lens when the anti-shake device is not used, zooming, focusing, and diaphragm drive are performed by the power supply on the body side. Since it will be held, it will not interfere with the shooting.

[0014]

However, even in the above-mentioned configuration, even if one of the power supplies is lost first, even if the other power supply still has a large capacity, the power supply remains. The function of the person who has gone is no longer available. That is, if the power supply on the side of the image capturing apparatus is lost first, further image capture is impossible even if the power source on the side of the image blur prevention apparatus remains. In addition, if the image stabilization device's power is exhausted first and the image capture device's power remains, the image stabilization effect cannot be obtained even when the image stabilization effect is required. There was a problem that it would end up.

In order to solve this problem, if necessary, it is possible to supply power from the image blur prevention device side to the photographing device and from the photographing device side to the image blur prevention device. good. By doing so, power can be supplied from the other side to the side where the power is consumed.

However, even in the case of such a configuration, in the conventional single-lens reflex camera system, it is usual that the interchangeable lens side does not have a built-in power source, and therefore, when a lens having no built-in power source is mounted. It was necessary to deal with it.

An object of the present invention is to solve the problems inherent in the previously proposed apparatus as described above and to provide a more practical photographing apparatus.

[0018]

A photographing apparatus according to the present invention has a power source separate from a power source in the photographing apparatus main body, includes an accessory detachable from the photographing apparatus main body, and is supplied with power from the power source of the accessory. An electric system, a means for measuring the degree of power consumption of the accessory, a means for enabling power supply to the electric system from a power source in the photographing apparatus body according to the measurement result of the measuring means, and a photographing apparatus The above problems have been solved by providing means for detecting the degree of consumption of the power source in the main body and means for enabling the power supply of the accessory from the power source of the accessory according to the output of the detecting means. .. Further, in the image pickup apparatus of the present invention, the above problem is solved by providing the image pickup apparatus main body side with the determination unit that can determine whether or not the accessory has the power supply unit.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention. This embodiment is an example in which an accessory is configured as an interchangeable lens incorporating the above-described image blur prevention device and an additional power source.

In FIG. 1, reference numeral 8 denotes an interchangeable lens body incorporating the above-described image blur prevention device, and an image blur prevention device 14
Built in. The image blur prevention device 14 includes a blur prevention control unit 12 that performs the blur prevention operation described in the section of the related art, and a blur prevention CPU 13 that manages the start and stop of the operation of the blur prevention control unit 12.

The shake prevention control unit 12 uses a shake detection sensor 9 for detecting a shake, a signal processing system 10 for performing feedback control based on a signal from the shake detection sensor 9, and an actual shake by a control signal from the signal processing system 10. It comprises an anti-shake drive system 12 that performs a correction operation. The sensor 9 corresponds to the angular accelerometer 1 and the signal processing system 10 corresponds to the integrators 2 and 3, the position detecting means 6, and the operational amplifier 7 in the anti-shake device described in FIG. 20, respectively. The anti-shake drive system 11 also corresponds to the imaging system 4 and the actuator 5.

An in-lens power source 15 is built in the lens body 8. As the power source, for example, a lithium battery for a camera, an alkaline manganese dry battery, a Ni-Cd dry battery, or the like is used.

Power is supplied to the image blur prevention device 14 from a power source 15 in the lens.

The power check means 30 is a shake prevention CPU
The consumption degree of the power supply 15 in the lens is checked according to a command from 13. FIG. 2 is an example of a circuit of the power supply check means 30.

The power consumption is checked by measuring the power supply voltage when a load is applied. In FIG. 2, resistors R301 and R302 are used as load resistors. Both use a resistor with a low resistance value of about several Ω.
Here, R301 = R302 = 4.7Ω. By flowing a current through the load resistance and measuring the voltage at the connection point A between R301 and R302 with the A / D converter 40, the degree of power consumption can be confirmed. The voltage Va measured at the point A is represented by Va = Vdd × R301 / (R301 + R302), where Vdd is the actual power supply voltage, and R301 and R302 are the same as in the present embodiment.
When the resistance values of the two are equal, approximately 1/2 of the power supply voltage Vdd
Becomes

The blur prevention CPU 13 checks the power supply as follows. The shake prevention CPU 13 controls the power check signal BCL to control the load resistance R30.
1, R302 can be loaded. When the power supply check signal BCL is L, the load resistances R301 and R30
No current flows through 2. When the shake prevention CPU 13 sets the power supply check signal BCL to H, the switching transistor works so that a current flows through the resistors R301 and R302. The blur prevention CPU 13 then R
The potential at the connection point of 301 and R302 is converted into 8-bit digital information by the A / D converter 40 and read. From the read voltage value, it is possible to know the current power supply voltage of the power supply 15 when a load is applied, that is, the power consumption of the power supply.

Reference numeral 16 denotes a contact 21 for communication from the body side.
The focus drive system 17, the zoom drive system 18, and the aperture drive system 1 are received according to the command values.
9 is a lens CPU for performing the operation of 9. In addition, the lens CPU 16 also communicates information about the inside of the lens (zoom position, focus position, aperture value state, etc.) and information about the lens (open aperture value, focal length, data required for distance measurement calculation, etc.) for communication. It is also transmitted to the body side from the contact 21e.

Communication between the body and the lens is performed as follows. For communication, a serial clock signal line LCLK sent from the body to the lens, a data signal line DCL sent from the camera to the lens, and a data signal line DL sent from the lens to the body.
C, the above three signal lines are used, and the communication is performed by clock synchronous serial communication.

FIG. 3 is a timing chart of communication between the camera body and the lens. The data signals (DCL and DLC) transmitted from the body or the lens are switched at the timing of the falling edge of the serial clock signal and are latched on the receiving side by the rising edge of the serial clock. The communication unit for one time is 8-bit data, which is transmitted at the MSB head. The data is 1 when the data line is H and 0 when it is L. The receiving unit and the transmitting unit are independent, and data transmission from the body to the lens and data transmission from the lens to the body are simultaneously performed in one communication.

Communication is in the form of commands to the lens. For example, a command is prepared to move the focus drive system by a specified number of pulses and transmit information necessary for distance measurement calculation to the body regardless of whether the diaphragm is closed or opened.

An example of actual communication will be described with reference to FIG. In FIG. 3, first, a command of 60 h is sent from the camera to the lens. Due to the communication system, data is also sent from the lens side at this time,
When this command 60h is sent, 00h (do nothing, has no meaning) is sent from the lens to the body.

Here, 60h is a command requesting the lens to return information (for example, focal length, aperture value, etc.). After this command is issued, the lens prepares necessary information, and when the next eight clocks are transmitted from the body, the prepared information is transmitted to the body side in synchronization with it. At this time, the body side is to obtain information from the lens side, and therefore 00h is transmitted from the camera to the lens as data. In the example of FIG. 3, 21h is transmitted from the lens side as a reply to 60h. As described above, the communication is performed whenever data is needed for calculation for distance measurement or photometry on the body side, and each time focusing operation, diaphragm operation, etc. are required.

The components of this embodiment will be described again. The focus drive system 17 drives a lens for focus adjustment according to a command value from the lens CPU 16 to perform focusing. The zoom drive system 18 drives the lens barrel so as to change the focal length of the lens according to a command value from the lens CPU 16 or when a switch (not shown) is pressed by the photographer. The diaphragm drive system 19 performs an operation of diaphragming to a set position or returning to an open state according to a command value from the lens CPU 16.

Lens CPU 16, focus drive system 1
The lens electric system 20 is composed of the zoom drive system 18, the diaphragm drive system 18, and the diaphragm drive system 7. Electric power is supplied to the lens electric system 20 from a power supply 29 in the body through a mount Vdd contact 21a and a GND contact 21b.

Inside the camera body 22, an in-body electric system 28 is provided as a photometric unit 23, a distance measuring unit 24, a shutter 25, a feeding charge system 26, a power source checking means 31, and management of starting and stopping these operations. A body CPU 27 for performing exposure calculation, distance measurement calculation, etc. is built in. Power is supplied to the electric system 28 inside the body from the power source 29 inside the body.

The power check means 31 is the body CPU 2
7 is a means for checking the degree of wear of the power supply 29 in the body in accordance with a command from 7. The circuit has the same configuration as the power supply check means 30 in the lens described in FIG.

Reference numerals 32a and 32b denote backflow prevention diodes installed so that one power source does not charge the other power source when the lens power source 15 and the body power source 29 are connected in parallel.

33 is an analog switch, which is a blur prevention CP
It is turned on or off by a signal from U31.
When it is on, the lens power supply 15 and the body power supply 29
Are connected in parallel, and these two power supplies are disconnected in the off state.

Next, the operation of this embodiment will be described.
In the normal state in which both the power source 29 in the body and the power source 15 in the lens are sufficient in capacity, the analog switch 33 turns o.
In the ff state, the in-body power supply 29 supplies electric power to the electric system 28 inside the body and the electric system 20 inside the lens 8, and the in-lens power supply 15 supplies electric power to the image blur prevention device 14. ing.

FIG. 4 is a flow chart of the part relating to the power supply check operation of the body CPU 27. Body C
The PU 27 performs a battery check when a battery check switch (not shown) is turned on by the photographer. In addition, just before the load is applied to the power supply in the body such as feeding, shutter charging, shutter curtain running,
The battery is also automatically checked immediately before the load is applied to the lens that is supplying power, such as focus drive, aperture drive, and zoom drive. The configuration of the power supply check circuit 31 in the body is the same as the configuration of the power supply check circuit 30 in the lens described in FIG. The battery check operation on the body side will be described with reference to FIGS. 2 and 4.

First, the power supply check operation is activated under the various conditions described above. When the power check operation is started, the body CPU 27 first sets the power check signal BCL to H according to step 100 of FIG. Then, due to the function of the switching transistor, the load resistance R301,
A current flows through R302. Load resistance R301, R302
Since the resistance value of is low, the power supply is in a loaded state. In this state, the body CPU 27 proceeds to step 101 to start the A / D converter 30.

The body CPU 27 executes the next step 10
In step 2, it is checked whether the A / D conversion is completed. If it is not completed, step 102 is repeated. If it is completed, the process proceeds to step 103, and BCL is returned to L again.
Stop the load on the power supply.

By R / A conversion, R301 and R302
The electric potential at the connection point A is measured. In this embodiment, the resistance values of R301 and R302 are equal, and the voltage value measured here is about 1/2 of the voltage value Vdd of the body power supply 29.
It becomes Vdd.

In the next step 104, the converted result is compared with the BC level held in the CPU. B
The C level is divided into three levels of 0, 1, and 2.

Level 0 indicates that the capacity of the power supply is sufficient and there is no abnormality. In case of level 0, step 106
It is checked whether the power check operation currently being executed is performed by the photographer operating the switch for power check, and if so, after performing the power check normal display in step 107. , Return from power check operation. For display,
A speaker built in a body not shown in FIG. 2 or L
For example, a light emitting body such as an ED, a liquid crystal display device, or the like is used to light the light emitting body. If it is determined in step 106 that the power check operation is not started by the switch but the power check is automatically performed on the body side, nothing is displayed and the power check operation is performed as it is. To return from.

Level 1 represents a state in which the power source capacity in the body is considerably reduced although the power source in the body can operate alone.
In this case, the process proceeds to step 108 and the body CPU 27
Transmits a power supply request signal to the lens side. The power supply request signal is communicated based on the above-mentioned body-lens communication format. As the power supply request, a specific code that means that the remaining capacity is small may be assigned. For example, OF
A specific code such as h may be set so as to mean a power supply request. In addition, BC measured at the time of power supply check
You may make it transmit the numerical value of a level as it is. For example, the configuration may be such that 60h represents BC level transmission and the next 1 byte represents BC level. In this case, for example, when 60h and 01h are transmitted from the body, the lens-side blur prevention CPU 13 interprets this as a power supply request from the body.

Level 2 shows the case where the power supply voltage has dropped to such an extent that operation cannot be performed any more. In this case, the process proceeds to step 109 and the power supply is immediately disabled without requesting power supply to the lens side. Display a check failure. As a display method, a buzzer sounds intermittently, a light-emitting body or a liquid crystal display blinks, and the like.
Then, the power check operation is resumed. In this case, although not shown, even after returning to the main routine, the motor or the like is not driven due to the insufficient power source capacity, and only the state of waiting for the power source replacement is entered.

FIG. 5 shows the image blur prevention CP in the lens of the first embodiment.
It is a flowchart explaining the operation procedure in U13. Next, the operation on the side of the blur prevention CPU 13 will be described with reference to FIGS. 2 and 5.

First, after activation, the blur prevention CPU 13 initializes internal variables and peripheral circuits in step 110.
Next, the routine proceeds to step 111, where a wait state is entered until there is communication from the body.

When the communication is received, the process proceeds to the next step 112. In this embodiment, the image blur prevention CPU 13 starts and stops the image blur prevention device. Image blur prevention CPU1
When the body 3 receives a command for starting or stopping the image blur prevention device from the body through the above-described communication between the body and the lens, the device 3 activates or stops the image blur prevention device. If the content of the communication from the body side is a command to activate the image blur prevention device, it is considered necessary to check the power supply (BC), and the process proceeds to step 115. Step 115 to Step 11
The operation up to 9 is the operation of checking the power supply in the lens, and is the same as the operation of checking the power supply on the body side described with reference to FIG. Steps 115 to 119 are steps 100 to 1 in FIG.
It corresponds to 04 respectively. In the power check on the lens side, in step 119, A for power check
After the / D conversion is completed and the result is compared with the BC level, the process proceeds to step 120. If the result of the check is normal and the power supply capacity is sufficient, then although not shown in the figure, step 111 of activating the image blur prevention device and waiting for communication is performed.
And repeat the above loop. If step 12
When the remaining capacity of the power source is insufficient at 0, the process proceeds to the next step 121, and the analog switch 33 is turned on. As a result, the in-lens power supply 15 and the in-body power supply 29 are connected in parallel, so that power is supplied from the body side to the image blur prevention device 14 in the lens. Then, the process proceeds to the communication waiting step 111, and the above loop is repeated.

If it is determined in step 112 that the communication content is not a command related to the activation of the image blur prevention device, it is not necessary to check the power source, so the process proceeds to the next step 113. In step 113, it is checked whether or not the communication content from the body is a power supply request from the body side.
If it is a power supply request, the process proceeds to step 121, the analog switch 33 is turned on, the power supply 15 in the lens and the power supply 29 in the body are connected in parallel, and power can be supplied from the power supply 15 in the lens to the body side. To

If the communication content is not the power supply request in step 113, the process proceeds to step 114,
The processing (diaphragm operation, zooming operation, focusing operation, transmission of necessary information to the body side, etc.) according to the communication content is performed, and the process returns to step 111 to return to the state of communication acceptance.

Here, an example is shown in which the power source is checked only immediately before the image blur prevention device is activated, but the battery check may be explicitly performed by a battery check switch (not shown) as in the case of the body.

In the above-described first embodiment of the present invention, when both the power source in the lens and the power source in the body have sufficient capacity, the power source required for zooming, focusing and diaphragm drive is supplied from the body side. Power is supplied and power in the lens is used only to operate the anti-shake device.

When one of the power supplies is consumed, it is automatically detected and power is supplied from the power supply which is not consumed. Therefore, even if the power supply on the body side runs out during shooting, it is possible to supply power from the lens side, so it is possible to minimize the situation where it is not possible to shoot at a decisive moment. .. In addition, even if the power source on the lens side is consumed first, power can be supplied from the body side, so when it is necessary to prevent image blur, it is possible to avoid situations where it cannot be used due to power consumption. effective. The configuration of the power supply check means 30 described in the present embodiment is not limited to this. Further, the communication means and communication method between the lens and the body are not limited to those described in this embodiment. For example, the communication may be parallel communication,
The number of bits of data and the meaning of the assigned command are not limited to these.

Further, in the present embodiment, an example of the interchangeable lens configured to electrically drive the zoom has been described, but
It is needless to say that the present invention is not limited to a zoom lens, and may be applied to a single focus lens. Further, even in the case of a zoom lens, the present invention is applied to a lens in which zoom operation is performed manually. It goes without saying that the structure may be configured as described above only for driving.

Second Embodiment The first embodiment is an example in which the present invention is applied to an interchangeable lens of a single-lens reflex camera, but the present invention is not limited to the interchangeable lens, and for example, an image blur prevention device is incorporated. It can also be applied to other extenders. The second embodiment is such an example.

FIG. 6 is a block diagram showing the outline of the configuration of the second embodiment of the present invention.

In this embodiment, among the components of the first embodiment, the image blur prevention device 14 and the power supply 1 in the extender are included.
5 ', and a backflow prevention diode 32 associated with the power supply
The analog switch 33 is stored in the extender 34.

With respect to the lens electric system 20 including the lens CPU 16, the focus drive system 17, the zoom drive system 18, and the diaphragm drive system 19 in the lens 8 attached to the extender, the body 22 and the extender 34 are mounted from the body side. Power is supplied through the contacts 21a and 21b and the mount contacts 35a and 35b of the lens 8 and the extender 34.

In addition, for communication between the body and the lens, mount contacts 21C, 2 of the body 22 and the extender 34 are also used.
1d, 21c, the lens 8 and the mount contacts 35c, 35d, 35e of the extender 34 are transmitted.

Since the operation of this embodiment is the same as that of the first embodiment, its explanation is omitted.

Third Embodiment In the first and second embodiments, the power is supplied from the other when the power supply capacity of either one becomes smaller. However, the present invention is not limited to this.

The third embodiment is an embodiment in which the capacities of the power source in the body and the power source in the lens are appropriately compared, and power is supplied preferentially to the electric system in the body and the lens from the one having a larger remaining capacity. ..

FIG. 7 is a diagram showing the outline of the configuration of the third embodiment of the present invention, which is the same as the first embodiment of FIG. 1 except for the following points. That is, in the present embodiment, the power supply control means 36 for turning on / off the in-lens power supply 15 according to the command from the blur prevention CPU 13 and the body CPU 27.
A power supply control means 37 for turning on / off the power supply 29 in the body is added according to a command from.

The operation of this embodiment will be described below with reference to FIGS. 8 and 9. FIG. 8 is a flow chart of a part relating to the power supply check operation of the CPU 27 in the camera body of this embodiment, and FIG.
14 is a flowchart illustrating an operation procedure in 13.

First, the power supply check operation on the body side will be described with reference to FIG.

In this embodiment, the A / D for checking the power source is used.
The conversion operation is performed in steps 300 to 303 in FIG. 8 similarly to steps 100 to 103 in the first embodiment. However, unlike the first embodiment, in the present embodiment, the lens side shake prevention CPU 13 compares the power supply capacity on the body side and the power supply capacity on the lens side to obtain the result of which remaining capacity is larger. The CPU 27 obtains the result obtained by the power supply check, that is, the voltage value equivalent to the power supply capacity, by the body = lens communication to prevent blurring C
It is transmitted to the PU 13 (step 304).

Next, the operation on the lens side will be described with reference to FIG.

First, after activation, the blur prevention CPU 13 initializes internal variables and peripheral circuits in step 310.
In steps 321, 322 described later,
When comparing the remaining power supply capacity on the body side and the remaining power supply capacity on the lens side, if at least one piece of information is not obtained, the remaining power supply capacity on the body side and the remaining power supply capacity on the lens side stored in the memory. Initialize the value of with the value that represents the maximum remaining power capacity. Next, in step 311, the wait state is entered until communication is received from the body.

When the communication is received, the process proceeds to the next step 312. In this embodiment, the image blur prevention CPU 13 starts and stops the image blur prevention device. Image blur prevention CPU1
3 starts and stops the anti-shake device in accordance with a command to start or stop the image anti-shake device received from the body side through the above-mentioned body-lens communication. If the content of the communication from the body side is a command to activate the image blur prevention device, it is considered necessary to check the power supply (BC), and the process proceeds to step 315. Step 315 to Step 318
Up to the above, the power supply check operation in the lens is performed, and the operation is the same as the power supply check operation on the body side described with reference to FIG.

Up to this point, the operation is the same as that of the first embodiment described with reference to FIG. However, in this example,
Unlike the first embodiment, the power supply on the lens side and the power supply on the body side are not immediately connected in parallel depending on the result of the power supply check operation, but whether the lens or the body is compared with the result of the power supply check operation on the body side. It is different in that it determines whether to feed power from.

The image blur prevention CPU 13 proceeds to step 319 after step 318 and, in a later step, compares it with the power supply capacity on the body side.
The result of the / D conversion (representing the remaining power supply capacity on the lens side) is stored in the memory. Then, the process proceeds to step 321.

If it is determined in step 312 that the communication does not require power supply check (BC), the process proceeds to step 313. In this step, it is determined whether or not the communication content is transmission of the remaining power capacity of the body side, and if it is transmission of the remaining power capacity, step 3
In step 20, the received remaining power supply capacity on the body side is stored in the memory, and the flow advances to step 321. If the communication content is other than the above in step 313, the process proceeds to the next step 314, the processing (aperture operation, zooming operation, focusing operation, transmission of necessary information to the body side, etc.) according to the communication content is performed, and the step is executed again. Go to 311
Return to the state of communication acceptance.

Step 321 and the subsequent step 3
At 22, the remaining power capacities of the body side and the lens side are compared. When the body-side remaining power capacity is larger than the lens-side remaining power capacity, the process proceeds to step 330. In this case, first, in step 330, the analog
The switch 33 is turned on, and the power supply 15 in the lens and the power supply 29 in the body are connected in parallel.
It is possible to feed power from the image in-lens image blur prevention device 14 from 9. Next, in step 331, the intra-lens power supply 15 is sent to the body CPU 27 by communication between the body and the lens.
Communicate to turn off. In response to this communication, the body CPU 27 turns on the in-body power supply 29 by the power supply control means 37. The anti-shake CPU 13 waits in step 332 until the in-body power supply 29 is turned on. Since the power supply state is communicated from the body CPU 27 through the body-lens communication, whether or not the power supply 29 in the body is turned on is detected by the blur prevention CPU 13. After confirming that the in-body power supply 29 is turned on, the process proceeds to step 333, and the power supply control means 36 turns off the in-lens power supply 15.
After that, the process proceeds to step 311, and returns to the state of communication acceptance. With the above operation, power is supplied from the in-body power supply 29 to all of the body electric system 28, the lens electric system 20, and the image blur prevention device 14.

If the lens side remaining power source capacity is larger than the body side remaining power source capacity, the routine proceeds to step 327. In this case, first, the power supply controller 30 turns on the in-lens power supply 15. Next, in step 328, the analog switch 33 is turned on to connect the in-lens power supply 15 and the in-body power supply 29 in parallel, thereby enabling power supply from the in-lens power supply 15 to the body electrical system 28 and the lens electrical system 20. Next, in step 329, a request to turn off the power supply 29 in the body is transmitted to the body CPU 27 by communication between the body and the lens. Upon receiving this communication, the body CPU 27 operates to turn off the in-body power supply 29 by the power supply control means 37. The shake prevention CPU 13 proceeds to step 311, and returns to the state of communication acceptance. By the above operation, power is supplied from the in-lens power supply 15 to all of the body electric system 28, the lens electric system 20, and the image blur prevention device 14.

When both the remaining power supply capacity on the body side and the remaining power supply capacity on the lens side are equal, the routine proceeds to step 323, and first, the power supply control means 36 turns on the in-lens power supply 15. Next, at step 324, a request for releasing the power supply 29 in the body and turning on the power supply is transmitted to the body CPU 27 by communication between the body and the lens if the power supply 29 in the body is off. When the body CPU 27 receives this request, the power supply control means 37 turns on the in-body power supply 29. The shake prevention CPU 13 waits for the in-body power supply 29 to be turned on in step 325. Whether or not the power supply 29 in the body is turned on is communicated by the body CPU 27 through the body-lens communication, so that the shake prevention CPU 13 can detect it. Step 3 after confirming that the power supply in the body is turned on
In step 26, the analog switch 33 is turned off, and the in-lens power supply 15 and the in-body power supply 29 are disconnected. After that, the process proceeds to step 311, and returns to the state of communication acceptance. As a result, both the power source on the body side and the power source on the lens side are turned on, and power is supplied to the body electrical system 28 and the lens electrical system 20 from the power source 29 in the body.
Power is supplied to each of the power sources 15 independently of each other.

As described above, in this embodiment, the remaining capacities of the lens-side power source and the body-side power source are appropriately compared, and the one having the larger capacity is used as the power source. It is possible to drive the image blur prevention device and the camera system for as long as possible while suppressing the fluctuation of

Fourth Embodiment In the embodiments described above, in the case of the first and second embodiments,
When the power source of either the body or the accessory with the built-in image stabilization device is consumed, power is supplied from the side that is not consumed, and in the third embodiment, the power source is supplied from the side with the larger power capacity. Is configured to supply.

However, the image blur prevention device is not often used,
There may be shooting situations where other interchangeable lenses are mainly used. In such a case, for example, it is possible that the image blur prevention device consumes the power source of the body and interferes with shooting using another lens.

In order to solve this problem, the fourth embodiment is provided with a selectable mode in which power supply between the body and the accessory is enabled and a mode in which power supply between the body and the accessory is prohibited. ..

FIG. 10 is a diagram showing an outline of the configuration of this embodiment.

The present embodiment differs from the first embodiment in that the power supply line for supplying power between the body and the lens can be turned on and off by the switch 38. When the switch 38 is on, electric power can be supplied to each other between the body and the lens, and as described in the first embodiment, when one of the power supplies is consumed, the other can be supplied.

When the switch 38 is off, power cannot be supplied to each other even if the analog switch 33 is on. Therefore, the power consumption of one does not cause the power consumption of the other.

Thus, when it is desired not to consume the power source on the body side for preventing the image blur, automatic consumption can be avoided by switching the switch, and the power source can be turned on only when necessary. The effect is that you can enter a mode that lasts longer.

Fifth Embodiment In the fourth embodiment, the power feeding line is directly turned on / off by a switch, but the switching means is not based on such a method.

FIG. 11 is a diagram showing an outline of the configuration of this embodiment. In the fifth embodiment, the switch provided in the fourth embodiment is directly connected to the blur prevention CPU 13 in the lens as a switch 38 ', and a mode in which mutual power supply is possible and a mutual power supply are performed. The changeover switch to the prohibition mode is changed by software by the blur prevention CPU 13. The switch 38 'is a switch that selects a mode in which mutual power supply is prohibited in the ON state, and is in a mode in which mutual power supply is permitted in the OFF state. The shake prevention CPU 13 detects the state of the switch 38 'by the signal line being L when the switch 38' is in the ON state and being H when the switch 38 'is in the OFF state.

The operation of this embodiment will be described with reference to FIG. FIG. 12 is a flow chart for explaining the operation procedure in the in-lens image blur prevention CPU in the fifth embodiment. The flow of this embodiment is the first described with reference to FIG.
The flow is almost the same as that of the embodiment. That is, steps 110 to 120 in FIG. 5 are the same as steps 500 to 5 in FIG.
It corresponds to 10 and these perform the same operation as each other. The different points are as follows. In this embodiment, immediately before the step (# 512) of turning on the analog switch 33 and connecting the body power supply 29 and the in-lens power supply 15 in parallel to enable power supply to each other, the anti-shake CP is provided.
Step 511 in which U13 checks switch 38 '
Is included. Anti-shake CPU in step 511
If the switch 13 'recognizes that the switch 38' is in the off state, the process proceeds to step 512, and the shake prevention CPU 13 turns on the analog switch 33 to connect the body power source 29 and the lens power source 15 in parallel to supply power to each other. Yes (the same operation as in the first embodiment). When it is recognized that the switch 38 'is in the ON state, unlike the first embodiment, the blur prevention CPU 13 does not turn on the analog switch 33 so as not to supply power to each other, and proceeds to the communication waiting step 501. ..

With the above operation, the same effect as that of the fourth embodiment can be obtained in this embodiment.

Next, another embodiment of the present invention will be described, which is characterized in that a discriminating means for discriminating whether or not the accessory mounted on the camera body has a built-in power source.

Embodiment 6 FIGS. 13 to 18 are views showing an embodiment of an image pickup apparatus having the above-mentioned discrimination means. In this embodiment, a power source is built in an interchangeable lens as an accessory.

In FIG. 13, reference numeral 8 denotes an interchangeable lens body incorporating the above-described image blur prevention device.
4 built-in. The image blur prevention device 14 includes a blur prevention control unit 12 that performs the blur prevention operation described in the section of the related art, and a blur prevention CPU 13 that manages the start and stop of the operation of the blur prevention control unit 12.

The blurring prevention control unit 12 uses the blurring detection sensor 9 for detecting blurring, the signal processing system 10 for performing feedback control based on the signal from the blurring detection sensor 9, and the control signal from the signal processing system 10 for actual blurring. It comprises an anti-shake drive system 12 that performs a correction operation. In the shake prevention device described in FIG. 20, these correspond to the angular accelerometer 1 in the sensor 9, and the integrators 2 and 3, the position detection means 6, and the operational amplifier 7 in the signal processing system 10. .. Further, the anti-shake drive system 11 includes the imaging system 4,
It corresponds to the actuator 5.

An in-lens power source 15 is built in the lens body 8. As the power source, for example, a lithium battery for a camera, an alkaline manganese dry battery, a Ni-Cd dry battery, or the like is used.

Electric power is supplied to the image blur prevention device 14 from the power source 15 in the lens.

The power check means 30 is a shake prevention CPU.
The consumption degree of the power supply 15 in the lens is checked according to a command from 13. FIG. 14 is an example of a circuit of the power supply check means 30.

The consumption level of the power supply is checked by measuring the power supply voltage when a load is applied. In FIG. 14, resistors R301 and R302 are used as load resistors. Both use a resistor with a low resistance value of about several Ω. Here, R301 = R302 = 4.7Ω.
Apply a current to the load resistance and connect point A of R301 and R302.
The consumption level of the power supply can be confirmed by measuring the voltage of 1 by the A / D converter 40. The voltage Va measured at the point A is represented by Va = Vdd × R301 / (R301 + R302), where Vdd is the actual power supply voltage, and R301 and R302 are the same as in the present embodiment.
When the resistance values of the two are equal, approximately 1/2 of the power supply voltage Vdd
Becomes

The blur prevention CPU 13 checks the power supply as follows. The shake prevention CPU 13 controls the power check signal BCL to control the load resistance R30.
1, R302 can be loaded. When the power supply check signal BCL is L, the load resistances R301 and R30
No current flows through 2. When the shake prevention CPU 13 sets the power supply check signal BCL to H, the switching transistor works so that a current flows through the resistors R301 and R302. The blur prevention CPU 13 then R
The potential at the connection point of 301 and R302 is converted into 8-bit digital information by the A / D converter 40 and read. From the read voltage value, it is possible to know the current power supply voltage of the power supply 15 when a load is applied, that is, the power consumption of the power supply.

16 is a contact point 21 for communication from the body side.
The focus drive system 17, the zoom drive system 18, and the diaphragm drive system 1 are received according to the command values.
9 is a lens CPU for performing the operation of 9. In addition, the lens CPU 16 also communicates information about the inside of the lens (zoom position, focus position, aperture value state, etc.) and information about the lens (open aperture value, focal length, data required for distance measurement calculation, etc.) for communication. It is also transmitted to the body side from the contact 21e.

Communication between body = lens is performed as follows. For communication, a serial clock signal line LCLK sent from the body to the lens, a data signal line DCL sent from the camera to the lens, and a data signal line DL sent from the lens to the body.
C, the above three signal lines are used, and the communication is performed by clock synchronous serial communication.

FIG. 15 is a timing chart of communication between the camera body and the lens. The data signals (DCL and DLC) transmitted from the body or the lens are switched at the timing of the falling edge of the serial clock signal and are latched on the receiving side by the rising edge of the serial clock. The communication unit for one time is 8-bit data, which is transmitted at the MSB head. Data line is H
The data is 1 when, and 0 when L. The receiving unit and the transmitting unit are independent, and data transmission from the body to the lens and data transmission from the lens to the body are simultaneously performed in one communication.

Communication is in the form of commands to the lens. For example, a command is prepared to move the focus drive system by a specified number of pulses and transmit information necessary for distance measurement calculation to the body regardless of whether the diaphragm is closed or opened.

An example of actual communication will be described with reference to FIG. In FIG. 15, first, 60 h from the camera to the lens
Command has been sent. Due to the communication system, data is also sent from the lens side at this time, but when this command 60h is sent, 00h (do nothing, has no meaning) is sent from the lens to the body. Is coming.

Here, 60h is a command for requesting the lens to return information (for example, focal length, aperture value, etc.). After this command is issued, the lens prepares necessary information, and when the next eight clocks are transmitted from the body, the prepared information is transmitted to the body side in synchronization with it. At this time, the body side is to obtain information from the lens side, and therefore 00h is transmitted from the camera to the lens as data. In the example of FIG. 15, 21h is transmitted from the lens side as a reply to 60h. As described above, the communication is performed whenever data is needed for calculation for distance measurement or photometry on the body side, and each time focusing operation, diaphragm operation, etc. are required.

Further, in this embodiment, the communication also serves as an identifying means for indicating on the body 22 whether the lens 8 can supply power to the body 22. The contents of communication as the identification means in this embodiment will be described with reference to FIG.

FIG. 16 is a diagram showing the contents of communication as the identification means of this embodiment. In this embodiment, 7 from the body
When a command of 0h is transmitted, the lens is configured to return a 1-byte length status indicating its own characteristic. FIG. 16 shows the bit structure of this status byte. Bit 7 of the status is a bit indicating whether or not power can be supplied from the lens side to the body side as described in this embodiment. When this bit is 1,
Power supply to the body is possible, and 0 means that power supply to the body is not possible. This bit 7 determines whether or not the lens can supply power on the body side.

Other bits of this status are not directly related to the description of the present embodiment, but for example, whether auto focus is possible, whether it is a zoom lens, whether it is a mirror lens, tilt, shift. It is configured to have information such as whether it is operable, whether it is a macro lens, and whether it is a soft focus lens.

The communication for asking the characteristics of such a lens is performed whenever necessary, such as when the lens is attached to the body, when the body is switched from the operation stopped state to the operation state, and the like.

The components of this embodiment will be described again. The focus drive system 17 drives a lens for focus adjustment according to a command value from the lens CPU 16 to perform focusing. The zoom drive system 18 is the lens CPU 16
When a switch (not shown) is pressed by the photographer, the lens barrel is driven to change the focal length of the lens. The diaphragm drive system 19
According to the command value from the lens CPU 16, the diaphragm is stopped down to a set position or is returned to the open state.

Lens CPU 16, focus drive system 1
The lens electric system 20 is composed of the zoom drive system 18, the zoom drive system 18, and the aperture drive system 19. Electric power is supplied to the lens electric system 20 from a power supply 29 in the body through a mount Vdd contact 21a and a GND contact 21b.

As the in-body electric system 28 inside the camera body 22, the photometry unit 23, the distance measurement unit 24, the shutter 25, the feeding charge system 26, the power supply check means 31, and the management of the start and stop of these operations, A body CPU 27 for performing exposure calculation, distance measurement calculation, etc. is built in. Power is supplied to the electric system 28 inside the body from the power source 29 inside the body.

The power check means 31 is a body CPU
This is a means for checking the degree of wear of the in-body power supply 29 in response to a command from 27, and has the same circuit configuration as the in-lens power supply check means 30 described in FIG.

Reference numerals 32a and 32b denote backflow prevention diodes installed so that one power source does not charge the other power source when the in-lens power source 15 and the in-body power source 29 are connected in parallel.

33 is an analog switch, which is an anti-shake CP
It is turned on or off by a signal from U31.
When it is on, the lens power supply 15 and the body power supply 29
Are connected in parallel, and these two power supplies are disconnected in the off state.

Next, the operation of this embodiment will be described.

In the normal state in which both the power source 29 in the body and the power source 15 in the lens are sufficient in capacity, the analog switch 33 is in the off state, and the power source 29 in the body is the electrical system 28 in the body and the lens 8 in the body 8. Electrical system 2
0, and the in-lens power supply 15 supplies power to the image blur prevention device 14.

FIG. 17 is a flow chart of the part relating to the power supply check operation of the body CPU 27. The body CPU 27 performs a battery check when a battery check switch (not shown) is turned on by the photographer. In addition, immediately before the load is applied to the power supply in the body such as feeding, shutter charging, shutter curtain running, or just before the load is applied on the lens side that is supplying power such as focus drive, aperture drive, and zoom drive. Also, automatically check the battery. It is assumed that the structure of the power supply check circuit 31 in the body is the same as the structure of the power supply check circuit 30 in the lens described in FIG. Next, the battery check operation on the body side will be described with reference to FIG.

First, the power supply check operation is activated under the above various conditions. When the power supply check operation is started, the body CPU 27 first sets the power supply check signal BCL to H according to step 100 of FIG. Then, the load resistance R30 is generated by the action of the switching transistor.
1, a current flows through R302. Load resistance R301, R3
Since the resistance value of 02 is low, the power supply is in a loaded state. In this state, the body CPU 27 makes a step 101.
Then, the A / D converter 30 is started.

The body CPU 27 executes the next step 10
In step 2, it is checked whether the A / D conversion is completed. If it is not completed, step 102 is repeated. If it is completed, the process proceeds to step 103, and BCL is returned to L again.
Stop the load on the power supply.

By A / D conversion, R301 and R302
The electric potential at the connection point A is measured. In this embodiment, the resistance values of R301 and R302 are equal, and the voltage value measured here is about 1/2 of the voltage value Vdd of the body power supply 29.
It becomes Vdd.

In the next step 104, the converted result is compared with the threshold value for checking the power source held inside the CPU.

When the capacity of the power source is sufficient and there is no abnormality, the process proceeds to step 106. It is checked whether or not the power check operation currently being executed is performed by the photographer operating the switch for power check, and if so, after the power check normal is displayed in step 107, the power is turned off. Return from the check operation.
The display is performed by using a sounding body built in a body (not shown in FIG. 13), a light emitting body such as an LED, a liquid crystal display device, or the like, for example, turning on the light emitting body. If it is determined in step 106 that the power check operation is not started by the switch but the power check is automatically performed on the body side, nothing is displayed and the power check operation is performed as it is. To return from.

If the A / D conversion result is lower than the threshold value and the power supply voltage is low, step 108 is performed.
Go to and check whether power can be supplied from the lens. By examining bit 7 of the status byte as described in FIG. 4, it is possible to know whether the lens can be powered. The lens status byte may be known by communicating with the lens when proceeding to step 108, or by communicating in advance at any time before the start of the power check procedure. May be.

If the status bit 7 is 1 and power can be supplied from the lens, the process proceeds to step 109, and the body CPU 27 transmits a power supply request signal to the lens side. The power supply request signal is communicated based on the above-mentioned body-lens communication format. As the power supply request, a specific code that means that the remaining capacity is small may be assigned. For example, a specific code such as OFh may be defined to mean a power supply request. Also, the value of the BC level measured at the time of checking the power supply may be transmitted as it is. For example, the configuration may be such that 60h represents BC level transmission and the next 1 byte represents BC level. In this case, for example, 6 from the body
Lens side blurring prevention CP when 0h and 01h are sent
U13 is interpreted as a power supply request from the body.

When the status bit 7 is 0 and the power supply from the lens is impossible, the process proceeds to step 110, and the power supply check failure is displayed without requesting the power supply to the lens side. As a display method, a buzzer sounds intermittently, a light-emitting body or a liquid crystal display blinks, and the like. Then, the power check operation is resumed.

FIG. 18 shows the image blur prevention C in the lens of this embodiment.
It is a flowchart explaining the operation procedure in PU13. Next, the operation of the blur prevention CPU 13 side will be described with reference to FIG.

First, after activation, the blur prevention CPU 13 initializes internal variables and peripheral circuits in step 200.
Next, the routine proceeds to step 201, and the wait state is entered until there is communication from the body.

When the communication is received, the process proceeds to the next step 202. In this embodiment, the image blur prevention CPU 13 starts and stops the image blur prevention device. Image blur prevention CPU1
When the body 3 receives a command for starting or stopping the image blur prevention device from the body through the above-described communication between the body and the lens, the device 3 activates or stops the image blur prevention device. If the content of the communication from the body side is a command to activate the image blur prevention device, it is considered necessary to check the power supply (BC), and the process proceeds to step 207. Step 207 to Step 21
Up to 1 is the operation of the power supply check in the lens.
The power supply check operation on the body side described in 7 is the same as the operation except that the check target is different. Steps 207 to 211 are step 100 in FIG.
To 104 respectively. In the power check on the lens side, the A / D conversion for power check is completed in step 211, the result is compared with the threshold value, and then the process proceeds to step 212. If the result of the check is normal and the power supply capacity is sufficient, although not shown in the figure, the image blur prevention device is activated, the process proceeds to step 201 of waiting for communication, and the above loop is repeated. If the remaining capacity of the power source is insufficient in step 212, the process proceeds to the next step 213, and the analog switch 33 is turned on. As a result, the power supply 15 in the lens
Since the in-body power source 29 is connected in parallel, power is supplied from the body side to the image blur prevention device 14 in the lens. And step 20 waiting for communication
Go to 1 and repeat the above loop.

In step 202, if the communication content is not a command related to the activation of the image blur prevention device, it is not necessary to check the power source, so the process proceeds to the next step 203. In step 203, it is checked whether or not the communication content from the body is a power supply request from the body side. If it is a power supply request, the process proceeds to step 213, the analog switch 33 is turned on, and the power source 1 in the lens 1
5 and the in-body power supply 29 are connected in parallel, which enables power supply from the in-lens power supply 15 to the body side.

[0130] In step 203, if the communication content is not the power supply request, the process proceeds to the next step 204. In step 204, if the communication content is the command (70h) for inquiring about the characteristics of the lens described in FIG. 16, the process proceeds to step 205, and bit 7 of the status word indicating that power can be supplied to the body is set to 1 Then (with the other bits matched to the characteristics of the lens), reply to the body.

If the communication content is not the command (70h) for inquiring about the characteristics of the lens, the process proceeds to step 206 and the processing (diaphragm operation, zooming operation, focusing operation, necessary information body side) is performed. Etc.) and proceed to step 201 again,
Return to the state of communication acceptance.

Here, an example is shown in which the power source is checked only immediately before the image blur prevention device is activated, but the battery check may be explicitly performed by a battery check switch (not shown) as in the case of the body.

In the embodiments described above, when both the power source in the lens and the power source in the body have sufficient capacity,
The power required for zooming, focusing, and diaphragm driving is supplied from the body side, and the power inside the lens is used only for the operation of the anti-shake device.

When one of the power supplies is consumed, it is automatically detected and power is supplied from the power supply which is not consumed.

Also, since the lens side has an identifying means for indicating whether or not power can be supplied, the body side is externally connected when a normal lens having no power supply means is attached when the power supply in the body is exhausted. On the other hand, there is an effect that a warning indicating a power consumption state by light, sound, etc. is issued, and when a lens capable of supplying power is attached, an external display is not performed and a power supply request can be issued to the lens. The configuration of the power supply check means 30 described in the present embodiment is not limited to this. Further, the communication means and communication method between the lens and the body are not limited to those described in this embodiment. For example, the communication may be parallel communication, and the number of bits of data, the meaning of an assigned command, etc. are not limited to this. In particular, the communication content indicating that power supply to the body is possible is not limited to the configuration of this embodiment.

Further, in the present embodiment, an example of the interchangeable lens configured to electrically drive the zoom is also shown.
It is needless to say that the present invention is not limited to a zoom lens, and may be applied to a single focus lens. Further, even in the case of a zoom lens, the present invention is applied to a lens in which zoom operation is performed manually. It goes without saying that the structure may be configured as described above only for driving.

In the present embodiment, the communication means performed between the body and the accessory is used as the means for identifying whether or not the power can be mutually supplied between the bodies, but the determination means is not limited to this. is not.

In the seventh embodiment described below, the lens
In this embodiment, the presence / absence of a power supply unit is determined by the presence / absence of electrical contacts of the mount section.

FIG. 19 is a diagram showing the state of the mount contact of the image pickup apparatus of this embodiment. FIG. 19A shows the lens 8
It is the figure which looked at from the mount side, 35 is a mount,
As described in the above embodiment, the power supply Vdd contact 2
1a, a ground (GND) contact 21b, a serial clock (LCLK) contact 21c, a data line (DCL) contact 21d from the camera side to the lens side, and a data line (DLC) contact 21e from the lens side to the camera side by side. There is. These are contacts that are required even in a normal lens having no power supply means, but in this embodiment, a contact 34 is added in addition to this. The contact 34 does not exist in a normal lens.

FIG. 19B is a diagram showing how the contacts 34 are connected in a circuit manner. The contact 34 is connected to the power supply Vdd contact 21 a inside the lens 8 and inside the body 22 the backflow prevention diode 32 c.
It is input to the body CPU 27 via and is pulled down.

As shown in FIG. 19B, when the lens 8 having the power feeding means is connected to the body 22, the contact 34
Since the power supply voltage is applied to the body CPU27,
Is entered.

In the case of a lens that does not have a normal power feeding means, since there is no contact 34, the body side contact 34 is in an electrically open state and is pulled down, so that L is input to the body CPU 27. To be done.

Thus, it can be known that the lens having the power feeding means is mounted on the body side depending on whether the contact 34 is H or L.

Further, in this example, the electrical contact of the mount portion serves as the identification means, but the surface of the lens side mount portion that is in contact with the body side is provided with a protrusion in the lens capable of supplying power, regardless of the electrical means. Needless to say, a mechanical means may be used in which a lens that cannot be supplied with power does not have a protrusion and the body side detects this protrusion by a mechanical switch.

As described above, in the configurations of the embodiments shown in FIGS. 13 to 18 and the embodiment shown in FIG. 19, it is possible to distinguish between accessories that can supply power to the photographing apparatus body and accessories that do not. Therefore, when the power of the camera body is exhausted, the optimum operation is required depending on the type of accessory installed, that is, in the case of an accessory that can supply power, power supply from the accessory is requested. If not, there is an effect that it is possible to select to display the power consumption state on the photographing apparatus main body side.

[0146]

As described above, in the structure of the present invention, the power supply inside the accessory and the power supply inside the photographing apparatus main body can supply power from either of them as required. Even if one of the power supplies runs out first, the power is supplied from the other power supply, so that the required function can be used for a long time to some extent.

Further, in the configuration of the present invention, since it is possible to distinguish between the accessory capable of supplying power to the photographing apparatus main body and the accessory not capable of supplying power to the photographing apparatus main body, when the power source of the photographing apparatus main body is exhausted, Depending on the type of accessory that is installed, it requires optimal operation, that is, power supply from the accessory is required if the accessory can supply power, and if not, the power consumption status is displayed on the camera body side. The effect is that you can choose to do it.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a first embodiment of the present invention.

FIG. 2 is a circuit diagram illustrating a circuit configuration of a power supply check unit according to the first embodiment.

FIG. 3 is a timing chart of communication between the camera body and the lens according to the first exemplary embodiment.

FIG. 4 is a flowchart of a part relating to a power supply check operation of the CPU in the camera body of the first embodiment.

FIG. 5 is a flowchart illustrating an operation procedure in the in-lens image blur prevention CPU of the first embodiment.

FIG. 6 is a block diagram showing a schematic configuration of a second embodiment of the present invention.

FIG. 7 is a block diagram showing a schematic configuration of a third embodiment of the present invention.

FIG. 8 is a flowchart of a portion related to a power supply check operation of the CPU in the camera body according to the third embodiment.

FIG. 9 is a flowchart illustrating an operation procedure in the in-lens image blur prevention CPU according to the third embodiment.

FIG. 10 is a block diagram showing a schematic configuration of a fourth embodiment.

FIG. 11 is a block diagram showing a schematic configuration of a fifth embodiment.

FIG. 12 is an image blur prevention CPU in the lens according to the fifth embodiment.
3 is a flowchart illustrating an operation procedure in FIG.

FIG. 13 is a diagram showing a configuration of a sixth embodiment of the present invention.

FIG. 14 is a diagram showing a circuit configuration of a power supply check unit in the configuration of FIG.

15 is a timing chart showing an example of communication contents between a camera body and an accessory (lens) in the configuration of FIG.

16 is a diagram showing an example of communication contents for determining the type of accessory (whether or not there is a power supply) in the configuration of FIG.

FIG. 17 is a CP in the camera body in the configuration of FIG.
The flowchart which shows operation | movement of U.

18 is a flowchart showing the operation of the CPU in the accessory (lens) in the configuration of FIG.

FIG. 19A is a front view of a mount unit having a detection unit as one component of an accessory discriminating unit included in the image capturing apparatus of the present invention. (B) is a detection means as one component of the accessory discriminating means included in the photographing apparatus of the present invention, and the accessory discriminating means.

FIG. 20 is a view for explaining the outline of the configuration of a conventional image blur prevention device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Angular accelerometer 5 ... Actuator 6 ... Position detection means 9 ... Shake detection sensor 10 ... Signal processing system 11 ... Shake prevention drive system 12 ... Shake prevention control part 13 ... Shake prevention CP
U 15 ... In-lens power supply 16 ... Lens CPU 20 ... Lens electric system 27 ... Body CP
U 28 ... Body electrical system 29 ... In-body power supply 30 ... Power supply check means 31 ... Power supply check means 33 ... Analog switch 36, 37 ... Power supply control means 38, 38 '... Switch

Claims (7)

[Claims] 1. A photographing apparatus including a combination of a photographing apparatus main body having a first power supply and an accessory detachable from the photographing apparatus main body, the photographing apparatus detecting a degree of consumption of the first power supply. One detection means, a second power supply provided in the accessory, a second detection means for detecting the degree of wear of the second power supply, and detection results of the first and second detection means On the basis of the above, there is provided an automatic power supply determining means for determining whether to supply power to the photographing apparatus main body and the accessory from the first power source or the second power source. Shooting device. 2. A photographing apparatus including a combination of a photographing apparatus main body having a first power source and an accessory detachable from the photographing apparatus main body, wherein the accessory has a power source. An image pickup apparatus comprising: an accessory type determination means for determining whether the power consumption is high and a power consumption level detection means for detecting a power consumption level of the power source. 3. A sound, a light, according to the detection result of the detecting means,
The photographing apparatus according to claim 1, further comprising warning means for generating a warning due to vibration or the like. 4. The power supply from the second power supply to the main body of the photographing apparatus is performed when the detection means detects that the first power supply is exhausted. The imaging device according to claim 1. 5. The photographing apparatus according to claim 1, wherein the degrees of wear of the second power source and the first power source are compared, and power is preferentially supplied from the one having a larger remaining capacity. 6. The photographing apparatus according to claim 1, further comprising means for transmitting a degree of consumption of the first power source to the accessory. 7. A first mode in which power can be supplied from the first power source to the accessory or power can be supplied from the second power source to the photographing apparatus main body, and a mode in which power is not supplied is provided. The image pickup apparatus according to claim 1, further comprising means for selecting.