JP2007279270A - camera - Google Patents

Abstract

A camera capable of selecting a state in which mirror driving and shutter charge driving are performed and a state in which a mirror is stopped and shutter charging driving is performed by using one built-in motor is provided.
A camera 1 rotates a mirror mechanism that operates a mirror 18, a charge mechanism that charges a shutter 19, a motor 3, and a driving force from the motor, and a first rotation that drives the mirror mechanism. It has the member 10 and the 2nd rotation member 13 which receives the driving force from a motor, rotates, and drives a charge mechanism. Further, the first state and the second state are switched according to the rotation direction of the motor, and the driving force of the motor is transmitted to the first and second rotating members in the first state, and the motor in the second state. Switching mechanisms 5 to 9 for transmitting the driving force to the second rotating member without transmitting them to the first rotating member.
[Selection] Figure 2

Description

  The present invention relates to a camera such as a digital single-lens reflex camera having a so-called quick return mirror and a shutter.

  Some single-lens reflex film cameras, as proposed in Patent Document 1, drive a mirror and shutter drive system and a film feed system with a single motor. In this camera, the mirror is driven to retract out of the optical path and the shutter charge is released by rotating the motor in the forward direction, and the mirror is driven to enter the optical path and the shutter charge is released by rotating the motor in the reverse direction. Perform return drive.

  In Patent Document 2, a film feeding mechanism and a recording medium attaching / detaching mechanism are selectively driven by a first motor via a switching mechanism to drive a mechanism for performing mirror driving and shutter charging and the switching mechanism. There has also been proposed a camera in which switching is performed by a second motor.

In addition to these, many cameras have been proposed in which a motor and a switching mechanism are combined to drive a plurality of mechanisms simultaneously or selectively.
Japanese Patent Laid-Open No. 10-339912 (paragraphs 0016 to 0039, FIGS. 2 to 8) JP 2002-296649 A (paragraphs 0037 to 0055, FIGS. 5 to 10)

  However, in a conventional camera, mirror driving and shutter charge are positioned as a group of driving that are related to each other. That is, in a normal camera sequence, the driving of the mirror and the shutter is generally considered as the same sequence. For this reason, the performance of continuous shooting in which the shutter is operated a plurality of times while the mirror is held at the position retracted from the optical path is sacrificed.

  In the past, there has been a system in which the mirror is mechanically locked and held at a position outside the optical path, and the shutter can be repeatedly driven by a motor drive device externally attached to the camera. However, although the mirror does not operate due to the mechanical lock, the mirror driving mechanism inside the camera is operating. Therefore, there is a problem that the operation is unnatural, and wasteful energy consumption and noise during operation are large.

  Accordingly, an object of the present invention is to provide a camera capable of selecting a state in which mirror driving and shutter charge driving are performed and a state in which the mirror is stopped and shutter charging driving is performed using a single built-in motor. One of them.

  A camera according to one aspect of the present invention includes a mirror mechanism that operates a mirror, a charge mechanism that charges a shutter, a motor, and a first rotating member that rotates by receiving a driving force from the motor and drives the mirror mechanism. And a second rotating member that rotates by receiving a driving force from the motor and drives the charge mechanism. Further, the camera switches between the first state and the second state according to the rotation direction of the motor, and transmits the driving force of the motor to the first and second rotating members in the first state, And a switching mechanism that transmits the driving force of the motor to the second rotating member without transmitting it to the first rotating member.

  Note that a camera system having the camera and an interchangeable lens attached to the camera, and an interchangeable lens attached to the camera also constitute another aspect of the present invention.

  According to the present invention, it is possible to select a state in which the mirror mechanism and the shutter charge mechanism are driven using one built-in motor and a state in which the mirror mechanism is stopped and the shutter charge mechanism is driven. For this reason, it is possible to realize a small camera that can suppress wasteful energy consumption and noise generation and can select a photographing sequence that can repeatedly perform a shutter operation with the mirror stopped. .

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a camera system comprising a single-lens reflex digital camera and an interchangeable lens according to an embodiment of the present invention. 2 to 10 show the configuration of a driving mechanism related to the mirror and shutter unit of the camera.

  First, in FIG. 1, 1 is a camera and 2 is an interchangeable lens. In the camera 1, a motor 3, a quick return mirror 18, a shutter unit 19, and an image sensor 20 are provided. Further, the camera 1 is provided with a mode switch 30 that is operated to select a normal shooting mode and a live view shooting mode, which will be described later. Further, the camera 1 is equipped with a microcomputer 40 that controls the operation of each part such as the motor 3 and the image sensor 20.

  The motor 3 is built in the grip portion of the camera 1. The quick return mirror 18 can move between a position (hereinafter referred to as a lowered position) disposed in the optical path from the interchangeable lens 2 to the image pickup device 20 and a position (hereinafter referred to as an elevated position) retracted outside the optical path. It is. The shutter unit 19 is a focal plane shutter having a front curtain and a rear curtain. The shutter unit 19 has an opening / closing mechanism for opening / closing the shutter unit 19 and a shutter drive unit 19b (FIG. 2) including a charge lever described later. The shutter unit 19 controls exposure of the image sensor 20.

  The image sensor 20 is composed of a CCD sensor or a CMOS sensor, and photoelectrically converts a subject image formed by the interchangeable lens 2. An image processing circuit (not shown) in the camera 1 performs a predetermined process on the photoelectric conversion signal from the image sensor 20 to generate an image signal. The image signal is displayed on a display (not shown) or recorded on a recording medium (semiconductor memory or the like) (not shown).

  Further, the microcomputer 40 performs autofocus (AF) control of the interchangeable lens 2 using a focus detection method such as a phase difference detection method or a TV-AF (contrast detection method) using the image signal.

  2 to 10, reference numeral 4 denotes a pinion gear attached to the output shaft of the motor 3. Reference numeral 5 denotes a sun gear, and the pinion gear 4 is engaged with the sun gear 5. Reference numeral 6 denotes a planetary arm that rotates with respect to the sun gear 5. Reference numerals 7 and 8 denote a first planetary gear and a second planetary gear, which are rotatably held by one and the other arm portions sandwiching the rotation axis of the planetary arm 6, respectively. The first planet gear 7 and the second planet gear 8 mesh with the sun gear 5. Reference numeral 9 denotes an idle gear that meshes with the second cam gear 13. These sun gear 5, planetary arm 6, first and second planetary gears 7, 8 and idle gear 9 constitute a switching mechanism.

  Reference numeral 10 denotes a first cam gear as a first rotating member. Reference numeral 11 denotes a first rotation detector that detects the rotation phase of the first cam gear 10. Reference numeral 13 denotes a second cam gear as a second rotating member. Reference numeral 14 denotes a second detector / detector that detects the rotational phase of the second cam gear 13.

  Reference numeral 10 a denotes a first cam formed integrally with the first cam gear 10. Reference numeral 13 a denotes a second cam formed integrally with the second cam gear 13.

  Here, the first cam gear 10 and the second cam gear 13 rotate around the same shaft 50. The first planetary gear 7 has an axial length that can mesh with both the first cam gear 10 and the second cam gear 13. On the other hand, the second planetary gear 8 can mesh with the idle gear 9. By rotating the first cam gear 10 and the second cam gear 13 around the same axis 50, simultaneous driving of the first and second cam gears 10 and 13 and driving of only the second cam gear 13 by the driving force from the switching mechanism are performed. The mechanism to be performed can be configured in a compact and simple manner. Further, the second planetary gear 8 is transmitted to the second cam gear 13 through the idle gear 9, so that the rotation direction of the second cam gear 13 is the same even when the rotation direction of the motor 3 is changed as will be described later. It can be. Further, this rotational direction is the same as the rotational driving direction of the first cam gear 10 by the first planetary gear 7. As a result, the configuration of the drive mechanism after the cam gears 10 and 13 can be simplified.

  Reference numeral 16 denotes a mirror drive lever constituting the mirror mechanism, and reference numeral 12 denotes a first cam lever that is driven by the first cam 10 a of the first cam gear 10 to drive the mirror drive lever 16. The first cam lever 12 can also drive a shutter lever 17 described later together with the mirror drive lever 16.

  Reference numeral 17 denotes a shutter lever constituting the shutter charge mechanism, and reference numeral 15 denotes a second cam lever that is driven by the second cam 13 a of the second cam gear 13 and drives the shutter lever 17. The second cam lever 15 is driven by the second cam 13 a of the second cam gear 13 and is also driven by the first cam 10 a of the first cam gear 10.

  12b is a bearing which supports the 1st cam lever 12 so that rotation is possible, 15b is a bearing which supports the 2nd cam lever 15 so that rotation is possible.

  Reference numeral 12a denotes a cam driven arm portion of the first cam lever 12, which contacts the first cam 10a. Reference numeral 12 c denotes a drive arm portion of the first cam lever 12, which can come into contact with both the mirror drive lever 16 and the shutter lever 17.

  Reference numeral 15a denotes a cam driven arm portion of the second cam lever 15, which can contact both the first cam 10a and the second cam 13a. Reference numeral 15 c denotes a drive arm portion of the second cam lever 15, which contacts the shutter lever 17.

  In this embodiment, the drive arm portion 12c of the first cam lever 12 can be brought into contact with both the mirror drive lever 16 and the shutter lever 17, and the cam follower arm portion 15a of the second cam lever 15 is made to be the first and second cams 10a, 13a can be brought into contact with both. As a result, shutter charge driving, which has a greater load than mirror driving, can be performed stably and at high speed.

  A bearing 16b rotatably supports the mirror driving lever 16. A bearing 17b rotatably supports the shutter lever 17.

  Reference numeral 16a denotes a drive arm portion of the mirror drive lever 16, which abuts on the quick return mirror 18 to drive up / down. Reference numeral 17a denotes a drive arm portion of the shutter lever 17, which contacts a charge lever 19a (FIG. 5) provided in the shutter drive portion 19b in order to charge a shutter travel spring (not shown) provided in the shutter unit 19. Touch.

  Reference numeral 16 c denotes a driven arm portion of the mirror driving lever 16, which contacts the driving arm portion 12 c of the first cam lever 12. Reference numeral 17 c denotes a driven arm portion of the shutter lever 17, which can contact both the driving arm portion 12 c of the first cam lever 12 and the driving arm portion 15 c of the second cam lever 15.

  9A and 9B show a view of the drive mechanism as viewed from the side. FIG. 9A shows a mirror-down state in which the mirror 18 is arranged at the lowered position, and FIG. 9B shows a mirror-up state in which the mirror 18 is arranged at the raised position. In this figure, the mirror drive lever 16 and the shutter lever 17 are each urged clockwise by a spring urging mechanism (not shown).

  The photographer selects one of the normal shooting mode and the live view shooting mode by operating the mode switch 30 before shooting. The normal shooting mode is a shooting mode in which one shooting is performed for one lifting operation of the quick return mirror 18. The live view shooting mode is a mode in which shooting can be performed one or more times with the quick return mirror 18 held in the raised position. In the normal shooting mode, shooting is performed while observing a subject through an optical finder (not shown). In the live view shooting mode, shooting is performed while observing a subject through an image acquired using the image sensor 20 (an electronic viewfinder image displayed on the display).

  First, the operation in the normal photographing mode will be described using FIGS. 3 to 5 and FIGS. 9A and 9B. 3 and 4 show the initial state (mirror down state) of the drive mechanism before operation, and the quick return mirror 18 reflects the light beam that has passed through the interchangeable lens 2 from the subject toward the optical viewfinder at the lowered position. . Further, the shutter unit 19 is in a charge completed state.

  FIG. 5 shows a state in which the quick return mirror 18 has been moved to the ascending position in preparation for shooting, and FIGS. 9A and 9B show the raising and lowering operations of the quick return mirror 18 performed in one shooting operation. As described above, FIG. 9A shows the mirror-down state, and FIG. 9B shows the mirror-up state.

  When the motor 3 is energized in the mirror-down state shown in FIGS. 3, 4 and 9A and the pinion gear 4 is rotated clockwise as indicated by the arrow in FIG. 3, the sun gear 5 is rotated counterclockwise. The first planetary gear 7 rotates in the clockwise direction.

  A friction spring (not shown) is provided between the sun gear 5 and the planetary arm 6. Therefore, the planetary arm 6 revolves counterclockwise by the rotational force of the sun gear 5 to the position where the first planetary gear 7 meshes with the first cam gear 10 and the second cam gear 13. FIG. 3 shows a state where the revolution has been completed.

  When the first planetary gear 7 meshes with the first cam gear 10 and the second cam gear 13, the first cam gear 10 and the second cam gear 13 rotate counterclockwise, and the first cam 10a and the second cam 13a are respectively Rotate from the maximum lift position to the minimum lift position.

  The mirror drive lever 16 and the shutter lever 17 that are urged by the spring urging mechanism by the above-described rotation of the first cam 10a and the second cam 13a are clockwise about the bearings 16b and 17b in FIG. 9A. To turn. Thereby, the driven arm portion 16c of the mirror driving lever 16 pushes the driving arm portion 12c of the first cam lever 12, and the driven arm portion 17c of the shutter lever 17 is connected to the driving arm portion 12c of the first cam lever 12 and the second cam lever. 15 drive arm portions 15c are pushed. Therefore, the first cam lever 12 and the second cam lever 15 rotate in the counterclockwise direction in FIG. 3 around the respective bearings 12b and 15b.

  Thus, the mirror up and shutter charge release states shown in FIGS. 5 and 9B are entered. At this time, a mirror up phase detection signal is output from the first rotation detector 11 and the second rotation detector 14, and the rotation of the motor 3 is stopped. The shutter charge release state is a state in which travel by releasing the charge of the front curtain and the rear curtain in the shutter unit 19 in which the shutter travel spring is charged is permitted.

  Next, when the shutter unit 19 operates to complete exposure (photographing) of the image sensor 20, the motor 3 is energized to rotate the pinion gear 4 again from the state of FIG. 5 in the clockwise direction. Thereby, the sun gear 5 and the planetary arm 6 rotate counterclockwise, and the first planetary gear 7 meshed with the first cam gear 10 and the second cam gear 13 rotates clockwise. Accordingly, the first cam gear 10 and the second cam gear 13 rotate counterclockwise, and the first cam 10a and the second cam 13a rotate from the minimum lift position to the maximum lift position.

  By the rotation of the first cam 10a and the second cam 13a, the cam driven arm portions 12a and 15a are respectively pushed by the first and second cams 10a and 13a, and the first cam lever 12 and the second cam lever 15 are shown in FIG. It rotates in the clockwise direction. As a result, the driving arm portion 12c of the first cam lever 12 pushes the driven arm portion 16c of the mirror driving lever 16 and the driven arm portion 17c of the shutter lever 17, and the driving arm portion 15c of the second cam lever 15 The 17 driven arm portions 17c are pushed. The mirror drive lever 16 and the shutter lever 17 rotate counterclockwise around the bearings 16b and 17b in FIG. 9B while charging the spring biasing mechanism and the shutter travel spring.

  Thus, the state again shifts to the same state as the initial state of FIG. At this time, a charge completion phase detection signal is output from the first rotation detector 11 and the second rotation detector 14 to stop the rotation of the motor 3.

  That is, in the normal photographing mode, the first cam gear 10 and the second cam gear 13 (first cam 10a and second cam 13a) are rotated from the maximum lift position to the minimum lift position by the rotation of the motor 3, and after the photographing, the minimum lift position Rotate to maximum lift position. As a result, the operation between the mirror-down and shutter-charge state (FIGS. 3 and 9A) in which the subject image can be observed by the optical viewfinder and the mirror-up and shutter-charge releaseable state (FIGS. 5 and 9B) that can be photographed is performed. Shoot repeatedly.

Next, the operation in the live view shooting mode will be described with reference to FIGS. Here, FIGS. 3, 4 and 10A show the initial state (mirror-down state), and FIGS. 5 and 10B show the shooting state (mirror-up shooting state) in the live view shooting mode. 6 to 8 and 10C show a state in which the shutter unit 19 is charged with the quick return mirror 18 held in the raised position. The motor 3 is energized from the state of FIGS. 3, 4 and 10A. When the pinion gear 4 is rotated in the clockwise direction as indicated by an arrow in FIG. 3, the sun gear 5 is rotated in the counterclockwise direction, and the first planetary gear 7 is rotated in the clockwise direction.

  As described above, a friction spring (not shown) is provided between the sun gear 5 and the planetary arm 6. Therefore, the planetary arm 6 revolves counterclockwise by the rotational force of the sun gear 5 to the position where the first planetary gear 7 meshes with the first cam gear 10 and the second cam gear 13. FIG. 3 shows a state where the revolution has been completed.

  When the first planetary gear 7 meshes with the first cam gear 10 and the second cam gear 13, the first cam gear 10 and the second cam gear 13 rotate counterclockwise, and the first cam 10a and the second cam 13a are respectively Rotate from the maximum lift position to the minimum lift position.

  The mirror drive lever 16 and the shutter lever 17 that are urged by the spring urging mechanism by the above-described rotation of the first cam 10a and the second cam 13a are clockwise about the bearings 16b and 17b in FIG. 10A. To turn. Thereby, the driven arm portion 16c of the mirror driving lever 16 pushes the driving arm portion 12c of the first cam lever 12, and the driven arm portion 17c of the shutter lever 17 is connected to the driving arm portion 12c of the first cam lever 12 and the second cam lever. 15 drive arm portions 15c are pushed. Therefore, the first cam lever 12 and the second cam lever 15 rotate in the counterclockwise direction in FIG. 3 around the respective bearings 12b and 15b.

  Thus, the mirror up and shutter charge release states shown in FIGS. 5 and 10B are entered. At this time, a mirror up phase detection signal is output from the first rotation detector 11 and the second rotation detector 14, and the rotation of the motor 3 is stopped. Up to this point, the operation is the same as in the normal shooting mode.

  Next, only the front curtain of the shutter unit 19 is opened to display an image (through image) acquired using the image sensor 20 on the display, and exposure conditions are determined and autofocus is performed using the image signal. Thereafter, when the photographer presses a photographing switch (not shown), the electronic front curtain realized by the control of the image sensor 20 is activated, and the rear curtain of the shutter unit 19 is closed after a predetermined time.

  Immediately after completion of the closing operation of the rear curtain, the motor 3 is energized, and the pinion gear 4 is rotated counterclockwise from the state of FIG. 5 (see FIG. 6). As a result, the sun gear 5 rotates in the clockwise direction and the second planetary gear 8 rotates in the counterclockwise direction. Further, the planetary arm 6 revolves in the clockwise direction to the position where the second planetary gear 8 meshes with the idle gear 9 by the rotational force of the sun gear 5. Thereby, the meshing between the first planetary gear 7 and the first and second cam gears 10, 13 is released. FIG. 6 shows a state where the revolution has been completed.

  The idle gear 9 meshes with only the second cam gear 13 of the first and second cam gears 10 and 13. For this reason, when the second planetary gear 8 rotates counterclockwise, the idle gear 9 rotates clockwise and the second cam gear 13 rotates counterclockwise. Accordingly, the second cam 13a rotates from the minimum lift position to the maximum lift position while the first cam 10a is stopped.

  Due to the rotation of the second cam 13a, the second cam lever 15 rotates in the clockwise direction in FIG. 6 when the cam driven arm portion 15a is pushed by the second cam 13a. Thereby, the drive arm portion 15 c of the second cam lever 15 pushes the driven arm portion 17 c of the shutter lever 17. The shutter lever 17 rotates counterclockwise around the bearing 17b in FIG. 10B while charging the spring biasing mechanism and the shutter travel spring.

  In this way, the mirror up and shutter charge completion states shown in FIGS. At this time, a charge completion phase detection signal is output from the second rotation detector 14, and the rotation of the motor 3 is stopped. During this time, the front curtain of the shutter unit 19 returns to the closed position, and the rear curtain returns to the open position.

  Immediately after this, only the front curtain of the shutter unit 19 is opened to display an image (through image) acquired using the image sensor 20 on the display, and exposure conditions are determined and autofocused using the image signal. Do. Then, after waiting for the photographer to press a photographing switch (not shown), the photographing operation is performed as described above, and the shutter charging operation is performed while maintaining the mirror-up state.

  That is, in the live view shooting mode, the first cam gear 10 and the second cam gear 13 (the first cam 10a and the second cam 13a) are moved from the maximum lift position by rotating in the first direction of the motor 3 from the state of FIG. 10A. Rotate to the minimum lift position and move to the state shown in FIG. 10B. Next, photographing is performed while the quick return mirror 18 is moved to and held in the raised position, and then the motor 3 is rotated backward in the second direction, so that only shutter charging is performed as shown in FIG. 10C. Further, when photographing is performed, the state shifts to the state of FIG. 10B and then returns to the state of FIG. 10C. By repeating this operation, it is possible to perform photographing a plurality of times while maintaining the mirror-up state.

  6-8 and 10C, the motor 3 is energized and the pinion 4 is rotated in the clockwise direction in FIG. 6 to return to the initial state (mirror down and shutter charge state). .

  Next, a shooting sequence in the normal shooting mode will be described using the flowchart of FIG. The operation shown in the flowchart of FIG. 11 is executed according to a computer program stored in the microcomputer 40.

  When the power of the camera 1 is turned on, the microcomputer 40 determines in step S101 whether the shooting mode is the normal shooting mode or the live view shooting mode. In the live view shooting mode, the process proceeds to the flowchart of FIG. If the release switch (not shown) is half-pressed (SW1) in the normal shooting mode, photometry and AF are performed in step S102, and the release switch full-press operation (SW2) is waited in step S103.

  If SW2 is not performed within the predetermined time in step S103, the process proceeds to step S104 and the shooting sequence is stopped. If SW2 is performed within a predetermined time in step S103, the remaining battery level is confirmed in step S105. If the remaining battery level is less than the predetermined amount, a warning is displayed in step S106, the process proceeds to step S107, and the shooting sequence is stopped. If the remaining battery level is still sufficient in step S105, the motor 3 is rotated forward in step S108, and the pinion gear 4 is rotated clockwise in FIG.

  When the mirror-up phase is detected by the first and second rotation detectors 11 and 14 in step S109, the rotation of the motor 3 is stopped by applying a brake to the motor 3 in step S110.

  In step S111, capturing of an image to be recorded from the image sensor 20 (that is, recording of a photographed image) is started, and exposure of the image sensor 20 is started by the front curtain operation of the shutter unit 19 in step S112. In step S113, the exposure is finished by the rear curtain operation of the shutter unit 19, and in step S114, the recording of the photographed image is finished.

  Next, in step S115, the motor 3 is rotated forward again. After that, when the first and second rotation detectors 11 and 14 detect the mirror down and the completion of charging in step S116, the motor 3 is stopped by applying the brake to the motor 3 in step S117.

  Next, in step S118, the capacity of the recording medium is confirmed. If the capacity is insufficient, the process proceeds to step S119, and the shooting sequence is stopped. On the other hand, if the capacity is sufficient, the process proceeds to step S120, and the captured image is stored in the recording medium.

  Next, in step S121, it is determined whether or not the next SW2 is performed. If so, the process proceeds to step S105, and the operations in steps S105 to S120 are repeated. When SW2 is not performed, the process proceeds to step S122, and the shooting sequence is stopped.

  In this way, in the normal shooting mode, shooting is performed a plurality of times by repeating mirror up → shooting → mirror down.

  Next, the operation procedure in the live view shooting mode will be described with reference to the flowcharts of FIGS.

  When the power of the camera 1 is turned on, the microcomputer 40 determines in step S101 in FIG. 11 whether the shooting mode is the normal shooting mode or the live view shooting mode. In the live view shooting mode, when a half-press operation (SW1) of a release switch (not shown) is performed, photometry and AF are performed in step S123.

  In step S124, the remaining battery level is checked. If the remaining battery level is less than the predetermined amount, a warning is displayed in step S125, the process proceeds to step S126, and the shooting sequence is stopped. If the remaining battery level is still sufficient in step S124, in step S127, an electromagnetic magnet (not shown) that holds the front curtain and rear curtain of the shutter unit 19 by magnetic force adsorption with the shutter running spring charged. ).

  Next, in step S128, the motor 3 is rotated forward, and the pinion gear 4 is rotated clockwise in FIG.

  Then, when the mirror up phase is detected by the first and second rotation detectors 11 and 14 in step S129, the rotation of the motor 3 is stopped by applying the brake to the motor 3 in step S130.

  Subsequently, in step S131, the energization of the electromagnetic magnet holding the shutter front curtain is cut, the front curtain is opened, and exposure of the image sensor 20 is started.

  Next, in step S132, image capture by charge accumulation from the image sensor 20 and readout of the accumulated signal is started, and display of a through image (electronic viewfinder image) on the display is started in step S133.

  Next, in step S134, an AE operation or a TV-AF operation based on the image signal is performed, and in step S135, a release switch full-press operation (SW2) is awaited. If SW2 is not performed within the predetermined time, the process proceeds to step S156, and the imaging sequence is stopped. If SW2 is performed within a predetermined time in step S135, the process proceeds to step S137, and the electronic front curtain of the image sensor 20 is activated. In step S138, recording of the captured image is started.

  Then, when a predetermined time has elapsed, in step S139, the energization of the electromagnetic magnet holding the shutter rear curtain is cut off, the rear curtain is closed, and the exposure of the image sensor 20 is completed. In step S140, the recording of the captured image ends.

  Thereafter, in step S141, only the electromagnetic magnet for the shutter rear curtain is energized. Next, in step S142, the motor 3 is reversely rotated to rotate the pinion gear 4 in the counterclockwise direction in FIG. 5 (see FIG. 6).

  When the charge completion phase detection signal is output from the second rotation detector 14 in step S143, the motor 3 is stopped by energizing the motor 3 in step S144.

  Next, in step S145, the capacity of the recording medium is confirmed. If the capacity is insufficient, the process proceeds to step S146, and the shooting sequence is stopped. On the other hand, if the capacity is sufficient, the process proceeds to step S147, and the captured image is stored in the recording medium.

  Next, in step S148, it is determined whether or not the next SW2 is performed. If so, the process proceeds to step S137, and the operations in steps S137 to S147 are repeated. When SW2 is not performed, the process proceeds to step S149, and it is determined whether SW1 is performed. When SW1 is being performed, since continuous shooting is instructed, the process proceeds to step S132, and the operations of steps S132 to S148 are repeated. If SW1 is not performed, the process proceeds to step S150.

  In step S150, the motor 3 is rotated forward to rotate the pinion 4 in the clockwise direction in FIG.

  In step S151, when the first and second rotation detectors 11 and 14 detect the mirror down and the completion of charging, in step S152, the motor 3 is stopped by applying a brake to the motor 3. As a result, the initial state is restored.

  That is, the single shooting in the live view shooting mode is performed by mirror up → first curtain running → image display → shooting → mirror down (return to the initial state). Also, continuous shooting in Live View shooting mode is: mirror up-> front curtain travel-> image display-> capture-> shutter only charge and front curtain travel-> image table display-> shooting-> shutter only charge and front curtain travel-> After shooting multiple times, the mirror is lowered to return to the initial state.

  In the present embodiment, a digital single lens reflex camera using an image sensor has been described. However, the present invention can also be applied to a camera using a silver salt film instead of the image sensor. In other words, the camera can select a normal shooting mode in which shooting is performed while checking the subject image for each shooting using an optical viewfinder, and a shooting mode in which shooting is performed multiple times with the quick return mirror fixed at the raised position. If present, the present invention can be applied regardless of the type.

1 is a top view showing a configuration of a single-lens reflex digital camera system that is an embodiment of the present invention. FIG. The disassembled perspective view which shows the structure of the mirror and shutter unit related drive mechanism of an Example. It is a top view which shows the initial state of the drive mechanism of an Example. The rear perspective view which shows the initial state of the drive mechanism of an Example. The perspective view which shows the state which the mirror moved to the raising position in the Example. The top view which shows the state which is charging only a shutter, with a mirror hold | maintained in a raise position in an Example. The rear perspective view showing the state where only the shutter is charged while the mirror is held in the raised position in the embodiment. The perspective view which shows the state which is charging only a shutter, with a mirror hold | maintained in a raise position in an Example. The side view which shows operation | movement of the mirror in the normal imaging | photography mode in an Example, and shutter charge. The side view which shows operation | movement of the mirror in the normal imaging | photography mode in an Example, and shutter charge. The side view which shows operation | movement of the mirror and shutter charge in the live view imaging | photography mode in an Example. The side view which shows operation | movement of the mirror and shutter charge in the live view imaging | photography mode in an Example. The side view which shows operation | movement of the mirror and shutter charge in the live view imaging | photography mode in an Example. It is a flowchart which shows the operation | movement in the normal imaging | photography mode of the camera of an Example. It is a flowchart which shows operation | movement in the live view imaging | photography mode of the camera of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera 2 Interchangeable lens 3 Motor 4 Pinion gear 5 Sun gear 6 Planetary arm 7 1st planetary gear 8 2nd planetary gear 9 Idle gear 10 1st cam gear 12 1st cam lever 13 2nd cam gear 15 2nd cam lever 16 Mirror drive lever 17 Shutter Lever 18 Quick return mirror 19 Shutter unit 20 Image sensor

Claims (8)

A mirror mechanism for operating the mirror;
A charging mechanism for charging the shutter;
A motor,
A first rotating member that rotates by receiving a driving force from the motor and drives the mirror mechanism;
A second rotating member that rotates in response to a driving force from the motor and drives the charge mechanism;
The first state and the second state are switched according to the rotation direction of the motor, and the driving force of the motor is transmitted to the first and second rotating members in the first state, and the second state And a switching mechanism that transmits the driving force of the motor to the second rotating member without transmitting the driving force of the motor to the first rotating member.   The camera according to claim 1, wherein the switching mechanism rotates the second rotating member in the same direction in the first state and the second state.   The camera according to claim 1, wherein the first rotating member and the second rotating member rotate around the same axis.   4. The camera according to claim 1, wherein each of the first and second rotating members includes a cam that drives the mirror mechanism and the charge mechanism. 5. When the switching mechanism is in the first state, the mirror operates between a first position disposed in the optical path and a second position disposed outside the optical path, and the charge mechanism. Operates between charged and uncharged states,
The mirror is stopped at the second position when the switching mechanism is in the second state, and the charge mechanism operates between a charge state and a charge release state. The camera according to any one of 1 to 4. The first rotating member drives the mirror mechanism via a first driving member; the second rotating member drives the shutter mechanism via a second driving member;
The first driving member can transmit a driving force to the mirror mechanism and the shutter mechanism, and the second driving member can generate a driving force from the first rotating member and the second rotating member. The camera according to claim 1, wherein the camera can be transmitted to the charge mechanism. A camera according to any one of claims 1 to 6;
An interchangeable lens mounted on the camera.   An interchangeable lens, which is attached to the camera according to claim 1.