JP5511211B2 - Shutter device and imaging device - Google Patents

Description

  The present invention relates to a shutter device provided in front of an image sensor to protect the image sensor, and an image capturing device such as a digital camera having the shutter device.

  Some digital cameras having an electronic shutter function in the image pickup device do not require a mechanical shutter for defining the shooting time, but some have a shutter device as a light shielding member for preventing the image pickup device from being soiled or burned. In addition, the digital camera has a function (hereinafter, live view) for displaying a subject image captured by an image sensor on a monitor such as an LCD (liquid crystal display) as a finder image for observing the subject at the time of shooting. There is something.

  The following shutter device is used as a light shielding member in these digital cameras.

  The first conventional example is a conventional shutter device used in a silver salt camera. This shutter device has a front curtain blade group that shifts the shutter opening from the shielding state to the open state during exposure, and a rear curtain blade group that shifts the shutter opening from the open state to the shielding state during exposure.

  The second conventional example is a shutter device disclosed in Patent Document 1, and is configured to open and close a set of blade groups by an electromagnetic actuator.

JP 2004-317665 A

  In the shutter device of the first conventional example, during the live view, it is necessary to continue energizing the rear curtain holding electromagnet in order to hold the rear curtain blade group in the shutter opening open state, and power is wasted. It was.

  Further, in the shutter device of the second conventional example, energization during live view is unnecessary, and the cost is low because the number of blade groups is smaller than that in the first conventional example. However, an electromagnetic actuator for the shutter device has been necessary. Most digital single-lens reflex cameras and the like have a dedicated motor for driving the mirror in addition to the electromagnetic actuator.

(Object of invention)
SUMMARY OF THE INVENTION An object of the present invention is to provide a shutter device and an imaging device that do not require an electromagnetic actuator and are configured by only one set of blade groups and have a low power load and a low cost. is there.

To achieve the above object, the present invention is, you drive the aperture through which the subject light, as with said blades of blade set close said aperture in a state of opening the aperture, the blade group A blade drive member, a first spring that biases the blade drive member so that the blade group closes the aperture, and a state in which the blade group closes the aperture by the biasing force of the first spring The shutter gear for driving the blade driving member and the quick return mirror are in the down state and the quick return mirror so that the blade group opens the aperture against the biasing force of the first spring. as but a up state, the mirror driving member for driving the quick return mirror, the quick return mirror and the up state The second spring for biasing the mirror driving member and the shutter gear directly mesh with each other, and the quick return mirror is brought up by the biasing force of the second spring, and resists the biasing force of the second spring. as the quick return mirror is down and has a, a mirror gears for driving the mirror driving member, the first phase by said shutter gear and the Miragia by the power of the motor is rotated In the first phase, the blade driving member is driven by the biasing force of the first spring, so that the blade group closes the aperture. And the mirror driving member is driven against the urging force of the second spring, so that the quick return mirror is in the down state, and the front In the second phase, the shutter gear rotates from the first phase, and the blade driving member is driven against the biasing force of the first spring, so that the blade group is moved to the aperture. And the mirror gear rotates from the first phase, and the mirror drive member is driven by the biasing force of the second spring, so that the quick return mirror is in the up state. It is characterized by that .

  According to the present invention, it is possible to provide a shutter device or an imaging device which does not require an electromagnetic actuator and is configured by only one set of blade groups, which has a small load in terms of power and is inexpensive.

It is the perspective view which looked at the camera which concerns on Example 1 of this invention from the front side and the back side. FIG. 3 is a block diagram illustrating a configuration of a control system of the camera according to the first embodiment. 1 is an exploded perspective view showing a shutter device and the like according to Embodiment 1. FIG. FIG. 3 is a plan view illustrating a camera stop state of the shutter device according to the first embodiment. FIG. 3 is a plan view illustrating a shooting standby state of the shutter device according to the first embodiment. FIG. 3 is a plan view illustrating a blade travel completion state of the shutter device according to the first embodiment. 6 is a plan view showing a camera stop state of a shutter device according to Embodiment 2. FIG. FIG. 6 is a plan view illustrating a shooting state of a shutter device according to a second embodiment. FIG. 10 is a plan view illustrating a charge start state of the shutter device according to the second embodiment.

  The mode for carrying out the present invention is as shown in Examples 1 and 2 below.

  FIG. 1 is a perspective view of a camera according to Embodiment 1 of the present invention as viewed from the front side and the back side. Note that the camera according to the first embodiment includes an image pickup device, photoelectrically converts a subject image using the image pickup device, generates image information, and records the image information on an electronic recording medium such as an arbitrary memory. It is a digital camera.

  In FIG. 1, reference numeral 1 denotes a camera body, and 2 denotes a photographic lens that can be attached to and detached from the camera body 1. Reference numeral 3 denotes a release button. When the switch SW1 for shooting preparation is turned on halfway to start photometry and focus adjustment operation, the switch SW2 for shooting is turned on when fully pressed, and the shutter device 4 is driven to perform shooting. Be started. Reference numeral 5 denotes a mode dial switch for switching various shooting modes of the camera. Reference numeral 6 denotes an image display unit used for confirmation and selection of photographed images and selection / setting of menu functions, and reference numeral 7 denotes an optical viewfinder for confirming a subject image.

  FIG. 2 is a block diagram showing a configuration of a control system according to the camera.

  In FIG. 2, reference numeral 2 denotes a photographic lens, which includes a plurality of optical lenses 8 and an aperture 9. Reference numeral 4 denotes a shutter device including a shutter charge cam 35 and the like which will be described later, details of which will be described later. Reference numeral 10 denotes an image pickup device that converts an image into an electric signal, which includes a CCD (Charge-Coupled Devices), a CMOS (Complementary Metal-Oxide Semiconductor), and the like, and has an electronic shutter function. Reference numeral 11 denotes an A / D converter that converts an analog image signal from the image sensor 10 into digital image data. A timing generation circuit 12 supplies a clock signal and a control signal to the image sensor 10 and the A / D converter 11 and is controlled by a memory controller 13 and a system controller 14 described later.

  An image processing unit 15 performs predetermined image processing such as pixel interpolation processing and color conversion processing on image data from the A / D conversion unit 11 or the memory control unit 13. The image processing unit 15 performs predetermined calculation processing using the image data output from the A / D conversion unit 11, and based on the obtained calculation result, a TTL (through-the-lens) AWB (automatic) White balance) control processing is also performed.

  A memory control unit 13 controls the A / D conversion unit 11, the timing generation circuit 12, the image processing unit 15, the image display memory 16, the display control unit 17, the memory 18, and the compression / decompression unit 19. The data output from the A / D conversion unit 11 is sent to the image display memory 16 via the image processing unit 15 and the memory control unit 13, or the data of the A / D conversion unit 11 is sent directly to the memory control unit 13 from the image display memory 16. It is written in the memory 18.

  Reference numeral 18 denotes a memory for storing captured images, which has a sufficient storage capacity for storing a predetermined number of images. A compression / decompression unit 19 compresses / decompresses image data read from the memory 18 according to a predetermined image compression method (for example, applied discrete cosine transform), and the processed image data is stored in the memory 18. Write to. The processed image data is recorded on the removable recording medium 20. The recording medium 20 is configured by a nonvolatile memory such as a flash memory. The memory 18 can also be used as a work area for the system control unit 14. Further, the image data is read from the recording medium 20 to the memory 18, the image data is written to the image display memory 16 via the image processing unit 15 and the memory control unit 13, and displayed on the image display unit 6 by the display control unit 17. Also used when doing.

  A motor 41 is driven based on a control signal from the motor control unit 21 and drives the shutter cam gear 35 and the quick return mirror 30 to a predetermined position in conjunction with the operation of the release button 3.

  Reference numeral 22 denotes an aperture control unit that controls the aperture 9, 23 a focus control unit that controls focusing of the photographing lens 2, 24 a strobe, and 25 a strobe control unit that controls the light emission of the strobe 24.

  Reference numeral 14 denotes a system control unit that controls the entire camera, and includes a microcomputer unit including a CPU, and executes a program stored in a memory 26 described later. A memory 26 stores constants, variables, programs, and the like for the operation of the system control unit 14. Examples of the program include various programs such as a program for performing an imaging process, a program for performing an image process, a program for recording the created image file data on a recording medium, and a program for reading the image file data from the recording medium. Furthermore, it is various programs, such as OS which implement | achieves and performs the multitask structure of the said program.

  Reference numeral 27 denotes a power supply control unit, which includes a power supply detection circuit, a DC / DC converter, a switch circuit that switches circuit blocks that supply power, and the like. Then, the presence / absence of a battery as a power source, the type of battery, the remaining battery level, etc. are detected, and the DC / DC converter is controlled based on the detection result and instructions from the system control unit 14, and the necessary voltage is required Electric power is supplied to each part including the recording medium 20 for a long period.

  FIG. 3 is an exploded perspective view of the shutter device 4 and the quick return mirror 30 of the camera configured as described above.

  The shutter base plate 29 is fixed to a mirror box of the camera body 1 (not shown in FIG. 3), and each component constituting the driving mechanism of the blade group 34c is attached. The quick return mirror 30 swings up and down so as to advance and retreat with respect to the imaging optical path in the mirror box by reciprocatingly rotating about the shaft portion 30a. A mirror drive lever 31 that is a mirror drive member is supported on an upper base plate 32 so as to be rotatable about its shaft portion 32a, and a quick return mirror disposed below the photographing optical axis at the shaft portion 31a. 30 is in contact with the shaft portion 30b which is a driven portion. Further, the mirror drive lever 31 abuts on the cam surface 33a of the mirror cam gear 33 which is the second cam gear at the shaft portion 31b. The quick return mirror 30 is urged by a spring (not shown) so as to follow the movement of the mirror drive lever 31.

  The blade drive lever 34, which is a blade drive member, is rotatably supported by a blade drive lever shaft 29a disposed on the shutter base plate 29. The shutter cam gear 35, which is the first cam gear, is supported so as to be rotatable about a shutter cam gear shaft 29b disposed on the shutter base plate 29. A blade drive lever roller 34a (shown in FIG. 4 and the like), which is a driven portion disposed on the blade drive lever 34, is in contact with a cam surface formed on the shutter cam gear 35. The mirror cam gear 33 is supported so as to be rotatable about a mirror cam gear shaft 29 c disposed in the shutter base plate 29 in the same direction as the photographing optical axis, and is directly connected to the shutter cam gear 35.

  In the above configuration, the mirror driving lever 31 and the shutter are driven by the driving force transmitted from the motor 41 having the output shaft in the same direction as the photographing optical axis through the reduction gear train 42 and the mirror cam gear 33 as transmission members. The cam gear 35 rotates. That is, only the motor 41 can perform the reciprocating rotation of the quick return mirror 30, the shutter charge of the shutter device 4, and the traveling operation of the blade group 34c.

  Next, the configuration of the shutter device 4 will be described in detail with reference to FIGS.

  4 to 6 are plan views of the shutter device 4 showing only the substantially right half as viewed from the subject side in a state where it is incorporated in the camera. Specifically, FIG. 4 shows a state where the camera is stopped, FIG. 5 shows a photographing standby state, and FIG. 6 shows a blade travel completion state after photographing. In these drawings, the upper base plate 32 is omitted.

  The shutter base plate 29 is formed with an aperture 29d through which the subject light flux passes. A blade drive lever 34 is rotatably supported on a blade drive lever shaft 29 a provided on the surface of the shutter base plate 29. A torsion coil spring (not shown) is disposed on the outer periphery of the blade drive lever shaft 29a. The torsion coil spring moves the blade drive lever 34 counterclockwise in FIG. 4 (direction in which the blade group 34c travels from top to bottom). Is energized.

  A blade drive pin 34b is formed at the tip of the blade drive lever 34. The blade drive pin 34b passes through a groove 29e formed in the shutter base plate 29 and engages with a blade drive arm (not shown). . The blade driving arm (not shown) is connected to the blade group 34c via a link mechanism. The blade group 34c is composed of a plurality of shutter blades.

  As the blade drive pin 34b moves along the groove 29e by the rotation of the blade drive lever 34, the blade drive arm can rotate to deploy or superimpose the blade group 34c. By the operation of the blade group 34c, the aperture 29d can be in an open state (a state in which the subject light beam is allowed to pass) or in a closed state (a state in which the subject light beam is substantially blocked). Here, the rotation range of the blade drive lever 34 is limited by the groove 29e.

  A shutter cam gear 35 is rotatably supported by a shutter cam gear shaft 29b provided on the shutter base plate 29. The shutter cam portion 35a (see FIG. 5) formed on the shutter cam gear 35 contacts the blade drive lever roller 34a provided on the blade drive lever 34 as the shutter cam gear 35 rotates, and rotates the blade drive lever 34. Move. Specifically, the shutter cam portion 35a of the shutter cam gear 35 moves the blade driving lever 34 in a state where the traveling of the blade group 34c is completed (when the blade group 34c is in the unfolded state) clockwise in FIG. The charging operation is performed by rotating in the direction.

  The mirror drive lever 31 is rotatably supported by the shaft portion 32a of the upper base plate 32. A torsion coil spring (not shown) is disposed on the outer periphery of the shaft portion 32a, and this torsion coil spring urges the mirror drive lever 31 in the clockwise direction (the direction in which the quick return mirror 30 is raised).

  The mirror cam gear 33 is rotatably supported by a mirror cam gear shaft 29 c provided on the shutter base plate 29 and meshes directly with the shutter cam gear 35. The cam surface 33 a formed on the mirror cam gear 33 abuts on a shaft portion 31 b provided on the mirror drive lever 31 and rotates the mirror drive lever 31 according to the rotation of the mirror cam gear 33. Specifically, the cam surface 33a of the mirror cam gear 33 performs a charging operation by rotating the mirror drive lever 31 that puts the quick return mirror 30 in the up state in the counterclockwise direction in FIG.

  The charging operation is performed by transmitting the rotational force of the motor 41 to the mirror cam gear 33 and the shutter cam gear 35 via the reduction gear train 42.

  Next, the operation of the shutter device 4 when actually shooting is described.

  When the release button 3 is fully pressed in the state of FIG. 4, the rotation of the motor 41 causes the mirror cam gear 33 to rotate clockwise and the shutter cam gear 35 to rotate counterclockwise. Then, the shaft 31b of the mirror drive lever 31 falls to the cam bottom of the cam surface 33a, so that the mirror drive lever 31 jumps up the quick return mirror 30. Further, when the shutter cam portion 35a of the shutter cam gear 35 pushes the blade drive lever roller 34a, the blade drive lever 34 rotates clockwise, and the state shifts to the photographing standby state shown in FIG. 5 in which the aperture 29d is opened. In the state of FIG. 5, exposure is performed by a live view operation or an electronic shutter function of the image sensor 10.

  After the exposure by the image sensor 10, the mirror cam gear 33 rotates clockwise and the shutter cam gear 35 rotates counterclockwise by the rotation of the motor 41. Then, the shutter cam portion 35a of the shutter cam gear 35 moves away from the blade drive lever roller 34a, and the blade drive lever 34 rotates counterclockwise, whereby the aperture 29d is closed and the blade travel complete state shown in FIG.

  When the motor 41 further rotates, the cam surface 33a of the mirror cam gear 33 pushes the shaft portion 31b of the mirror drive lever 31, and the mirror drive lever 31 rotates counterclockwise, returning to the state shown in FIGS.

  The shutter device according to the first embodiment includes an aperture 29d through which subject light passes, and a blade drive lever roller (pushing portion) 34a, and a blade drive that causes the blade group 34c to perform the operations of closing and opening the aperture 29d. And a lever (blade driving member) 34. Further, a shutter cam gear (first cam gear) 35 that performs charge and release by rotating the blade drive lever roller 34a of the blade drive lever 34, and a mirror drive lever (mirror drive member) 31 that drives the quick return mirror 30 are provided. Have. Further, it has a cam surface 33 a for driving the mirror drive lever 31, a rotating cam shaft in the same direction as the shaft 29 b of the shutter cam gear 35, and a mirror cam gear (second cam gear) 33 that interlocks with the shutter cam gear 35.

  When the power of the motor 41 is transmitted to the shutter cam gear 35 and the mirror cam gear 33 and rotates, the shutter cam gear 35 brings the blade drive lever 34 into a charge release state, thereby closing the aperture 29d. Then, the mirror cam gear 33 takes the first phase (FIG. 4) in which the mirror driving member 31 is moved to the first position. Further, the shutter cam gear 35 brings the blade drive lever 34 into a charged state to open the aperture 29d, and the mirror cam gear 33 moves the mirror drive member 31 to the second position (FIG. 5). Take. In other words, the motor 41, the mirror cam gear 33, and the shutter cam gear 35 are connected, and when the motor 41 rotates, the shutter cam gear 35 and the mirror cam gear 33 rotate in opposite directions, respectively. Accordingly, the aperture 29d is in a closed state (shutter closed). Then, a first phase in which the quick return mirror 30 enters the photographing optical path, an aperture 29d in the open state (shutter open), and a second phase in a state in which the quick return mirror 30 is retracted from the photographing optical path are sequentially taken. .

  Therefore, the shutter device can be configured without using the electromagnetic actuator as in the conventional example. That is, an electromagnetic actuator other than a motor is not required, and a shutter device that is configured by only one set of blade groups and that has a small load in terms of power and is inexpensive in terms of cost can be provided. Further, since the aperture is closed by the charge release operation of the blade drive lever 34, the light shielding operation can be performed quickly after photographing.

  Next, a camera according to Embodiment 2 of the present invention will be described. The configuration of the camera is almost the same as the configuration of the first embodiment described above, except that the configuration of the blade drive lever and the shutter cam gear is mainly different, so the other members and parts are the same as those of the first embodiment. The sign is attached.

  7 to 9 are diagrams showing the configuration of the shutter device 4 according to the second embodiment of the present invention. Specifically, FIG. 7 shows a state in which the camera is stopped, FIG. 8 shows a photographing standby state, and FIG. Indicates the charge start state after shooting.

  A blade drive lever 36 is rotatably supported on a blade drive lever shaft 29 a provided on the surface of the shutter base plate 29. A torsion coil spring (not shown) is disposed on the outer periphery of the blade drive lever shaft 29a, and this torsion coil spring moves the blade drive lever 36 counterclockwise in FIG. 7 (direction in which the blade group 36c travels from top to bottom). Is energized.

  A blade drive pin 36b is formed at the tip of the blade drive lever 36, and this blade drive pin 36b passes through a groove 29e formed in the shutter base plate 29 and engages with a blade drive arm (not shown). . This blade drive arm (not shown) is connected to the blade group 36c via a link mechanism, and the blade group 36c is composed of a plurality of shutter blades.

  When the blade driving pin 36b moves along the groove 29e by the rotation of the blade driving lever 36, the blade driving arm (not shown) rotates to expand or superimpose the blade group 36c. By the operation of the blade group 36c, the aperture 29d can be opened (a state in which the subject light beam is allowed to pass) or can be closed (a state in which the subject light beam is substantially blocked). Here, the rotation range of the blade drive lever 36 is limited by the groove 29e.

  Reference numeral 37 denotes a shutter cam gear, which is rotatably supported by a shutter cam gear shaft 29 b provided on the shutter base plate 29. The shutter cam portion 37 a formed on the shutter cam gear 37 contacts the blade drive lever roller 36 a provided on the blade drive lever 36 and rotates the blade drive lever 36 according to the rotation of the shutter cam gear 37. Specifically, the shutter cam portion 37a of the shutter cam gear 37 moves the blade driving lever 36 in a state where the traveling of the blade group 36c is completed (when the blade group 36c is in a superimposed state) clockwise in FIG. The charging operation is performed by rotating in the direction.

  Next, the operation of the shutter device 4 when actually shooting is described.

  When the release button 3 is fully pressed in the state shown in FIG. 7, the rotation of the motor 41 causes the mirror cam gear 33 to rotate clockwise and the shutter cam gear 37 to rotate counterclockwise. Then, the shaft 31b of the mirror drive lever 31 falls to the cam bottom of the cam surface 33a, so that the mirror drive lever 31 jumps up the quick return mirror 30. Further, when the shutter cam portion 37a of the shutter cam gear 37 is separated from the blade drive lever roller 36a, the blade drive lever 36 rotates counterclockwise, and the state shifts to the photographing standby state shown in FIG. 8 in which the aperture 29d is opened.

  In the state of FIG. 8, exposure is performed by a live view operation or an electronic shutter function of the image sensor 10.

  After the exposure by the image sensor 10, when the mirror cam gear 33 rotates clockwise and the shutter cam gear 37 rotates counterclockwise by the rotation of the motor 41, the state shifts to the charge start state shown in FIG. When the motor 41 further rotates, the cam surface 33a of the mirror cam gear 33 pushes the shaft portion 31b of the mirror drive lever 31, and the mirror drive lever 31 rotates counterclockwise. At the same time, when the shutter cam portion 37a of the shutter cam gear 37 pushes the blade drive lever roller 36a, the blade drive lever 36 rotates clockwise, whereby the aperture 29d is closed, and the state returns to the state of FIGS.

  In the first embodiment, the image pickup device 10 is in a light-shielding state when the blade driving lever 34 travels by releasing the charge. In the second embodiment, the image pickup device 10 moves by moving the blade driving lever 36 by releasing the charge. 10 is exposed. For this reason, in the first embodiment, it is possible to quickly create a light shielding state after photographing. On the other hand, in the second embodiment, an exposure state can be quickly made before photographing. The first embodiment is suitable for suppressing smear that occurs when a high-luminance luminous flux enters the image sensor 10 after electronic shutter photography, and the second embodiment is suitable for shortening the release time lag.

  The shutter device according to the second embodiment includes an aperture 29d through which subject light passes, and a blade drive lever roller (pushing portion) 36a, and a blade drive that causes the blade group 36c to perform each operation of closing and opening the aperture 29d. And a lever (blade driving member) 36. Further, a shutter cam gear (first cam gear) 37 that rotates the blade driving lever roller 36a of the blade driving lever 36 to perform charging and releasing, and a mirror driving lever (mirror driving member) 31 that drives the quick return mirror 30; Have Further, it has a cam surface 33 a that drives the mirror drive lever 31, and further includes a mirror cam gear (second cam gear) 33 that is provided with a rotating shaft in the same direction as the shaft 29 b of the shutter cam gear 37 and interlocks with the shutter cam gear 37.

  When the power of the motor 41 is transmitted to the shutter cam gear 37 and the mirror cam gear 33 and rotates, the shutter cam gear 37 puts the blade drive member 36 into a charged state, thereby closing the aperture 29d. Then, the mirror cam gear 33 takes a first phase (FIG. 7) in which the mirror driving member 31 is moved to the first position. Next, the shutter cam gear 37 releases the blade drive lever 36 to open the aperture 29d, and the mirror cam gear 33 operates the mirror drive lever 31 to the second position (FIG. 8). And take. That is, the first phase and the second phase are taken in order. In other words, the motor 41, the mirror cam gear 33, and the shutter cam gear 37 are connected, and when the motor 41 rotates, the shutter cam gear 37 and the mirror cam gear 33 rotate in opposite directions, respectively. Accordingly, the aperture 29d is in a closed state (shutter closed). Then, a first phase in which the quick return mirror 30 enters the photographing optical path, an aperture 29d in the open state (shutter open), and a second phase in a state in which the quick return mirror 30 is retracted from the photographing optical path are sequentially taken. .

  Therefore, the shutter device can be configured without using the electromagnetic actuator as in the conventional example. That is, an electromagnetic actuator other than a motor is not required, and a shutter device that is configured by only one set of blade groups and that has a small load in terms of power and is inexpensive in terms of cost can be provided. Further, since the aperture is closed according to the charged state of the blade driving member 36, the light shielding operation can be performed quickly before photographing.

4 Shutter 30 Quick return mirror 30b Shaft 31 Mirror drive lever 33 Mirror cam gear 33a Cam surface 34, 36 Blade drive lever 34a, 37a Blade drive lever roller 35, 37 Shutter cam gear 41 Motor

Claims (2)

An aperture through which the subject light passes,
As with said blades of blade set close said aperture in a state of opening the aperture, a blade driving member you drive the blade group,
A first spring that biases the blade driving member so that the blade group is in a state of closing the aperture;
The blade driving member is configured such that the blade group closes the aperture by the biasing force of the first spring, and the blade group opens the aperture against the biasing force of the first spring. A shutter gear for driving
A mirror driving member for driving the quick return mirror so that the quick return mirror is in a down state and the quick return mirror is in an up state ;
A second spring that biases a mirror driving member so that the quick return mirror is in the up state;
The quick return mirror is brought into an up state by the urging force of the second spring and directly engaged with the shutter gear, and the quick return mirror is brought into a down state against the urging force of the second spring. It has a mirror gears for driving the mirror driving member,
The shutter gear and the mirror gear are rotated by the power of the motor so as to transition in the order of the first phase and the second phase,
In the first phase, the blade driving member is driven by the biasing force of the first spring, whereby the blade group closes the aperture and resists the biasing force of the second spring. Then, by driving the mirror driving member, the quick return mirror is in a down state,
In the second phase, the shutter gear rotates from the first phase and the blade driving member is driven against the urging force of the first spring, so that the blade group is When the aperture is opened, the mirror gear rotates from the first phase, and the mirror driving member is driven by the biasing force of the second spring, so that the quick return mirror is in the up state. A shutter device characterized by that . An image sensor capable of performing an exposure operation with an electronic shutter;
An image pickup apparatus comprising the shutter device according to claim 1 .

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