JP7171217B2 - SHUTTER DEVICE, IMAGING DEVICE, AND SHUTTER DEVICE CONTROL METHOD - Google Patents

Description

The present invention relates to a shutter device and its control method.

2. Description of the Related Art Conventionally, there has been known a shutter device having a mechanical front curtain and rear curtain for controlling shutter speed and the like when an object is imaged. In addition, there is known an imaging apparatus that displays image data acquired by an imaging element with the front curtain open when so-called live view shooting is performed on a display device in real time.

By the way, when shifting to live view shooting, it is necessary to retract both the front curtain and the rear curtain that constitute the shutter device from the imaging area (exposure aperture). On the other hand, in order to reduce the time lag in photographing and to protect the imaging element, it is common to set the front curtain of the shutter device in a light shielding state (a state in which the exposure aperture is closed) in the standby state. Therefore, running sound is generated by running the front curtain when transitioning to live view shooting. In view of this, for example, Patent Document 1 discloses a shutter device that reduces the impact noise generated when the driving of the lever is completed by driving the lever for releasing the set of the shutter at a low speed.

JP 2016-20981 A

However, in the shutter device disclosed in Patent Document 1, although it is possible to reduce the collision sound that occurs when the shutter device is released, the collision sound of the front curtain against the stopper can be heard when the front curtain travels. It is difficult to reduce. Further, in the shutter device disclosed in Japanese Patent Laid-Open No. 2002-200310, it is difficult to prevent deterioration in durability due to contact of the front curtain with the stopper.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to suppress the generation of noise and the deterioration of the durability of the shutter device due to the running of the light shielding curtain.

A shutter device as one aspect of the present invention closes an exposure aperture in a standby state, and drives a light-shielding curtain that retreats from the exposure aperture and the light-shielding curtain when transitioning from the standby state to the live view state. and control means for controlling the first drive member, wherein the control means selects one mode from a plurality of modes including a first mode and a second mode. mode, and by changing the operation of the first driving member according to the mode, the traveling speed of the light shielding curtain can be changed, and the light shielding curtain operates in the first mode in the first mode. in the second mode, at a second running speed that is lower than the first running speed, and in the second mode, the light shielding curtain moves from the standby state to the live view. In the second mode, the light shielding curtain travels at the second travel speed, and then the light shielding curtain travels to retreat from the exposure opening. is completed at a speed higher than the second travel speed .

An imaging device as another aspect of the present invention has an imaging element and the shutter device.

According to another aspect of the present invention, there is provided a method of controlling a shutter device, comprising: a light shielding curtain that closes an exposure opening in a standby state and retracts from the exposure opening when transitioning from the standby state to a live view state; A control method for a shutter device having a first drive member for driving a light shielding curtain and control means for controlling the first drive member, wherein the shutter device operates in a first mode and a second mode. and determining the mode; and changing the operation of the first driving member in accordance with the mode to change the traveling speed of the light shielding curtain. wherein the light shielding curtain runs at a first running speed in the first mode, and at a second running speed lower than the first running speed in the second mode. The second mode is a mode selected when the light shielding curtain shifts from the standby state to the live view state . In the second mode, the light shielding curtain After traveling at the traveling speed of , it travels at a higher speed than the second traveling speed before completing the traveling for the light-shielding curtain to retreat from the exposure opening .

Other objects and features of the invention are described in the following embodiments.

According to the present invention, it is possible to suppress the generation of noise and the deterioration of the durability of the shutter device due to the movement of the light shielding curtain.

2 is an exploded perspective view of the shutter device according to the embodiment; FIG. 2 is an exploded perspective view of the shutter device according to the embodiment; FIG. FIG. 4 is an explanatory diagram of the operation of the shutter device in the normal mode in this embodiment; FIG. 4 is an explanatory diagram of the operation of the shutter device in the normal mode in this embodiment; FIG. 4 is an explanatory diagram of the operation of the shutter device in the low speed mode in this embodiment; FIG. 4 is an explanatory diagram of the operation of the shutter device in the low speed mode in this embodiment; 1 is an explanatory diagram of an imaging device according to this embodiment; FIG. 4 is a flow chart showing the operation of the imaging device when moving to live view according to the present embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the shutter device (focal plane shutter) in this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 and 2 are exploded perspective views of a shutter device (focal plane shutter) 100, showing views viewed from different directions. Reference numeral 1 denotes a shutter base plate, to which components of the shutter device 100, which will be described later, are attached. A cover plate 2 is attached to the shutter base plate 1 with a predetermined gap therebetween. The shutter base plate 1 is formed with an aperture 1a. A rectangular exposure opening formed by the aperture 1 a defines the light flux passing through the shutter base plate 1 .

3 is a front curtain unit, and 4 is a rear curtain unit. The front curtain unit 3 and the rear curtain unit 4 are arranged in a blade chamber formed by the shutter base plate 1 and the cover plate 2 . The front-curtain unit 3 has front-curtain blades (light shielding curtains) 301 , 302 , 303 and 304 and front-curtain blade arms 305 and 306 . The front curtain unit 3 is rotatably attached to the shutter base plate 1 by front curtain blade arms 305 and 306 . Like the front curtain unit 3, the rear curtain unit 4 has four blades and two arms. The configuration of the trailing curtain unit 4 is the same as the configuration of the four blades and the two arms of the leading curtain unit 3, so the description thereof will be omitted.

A blade stopper 5 functions as a stopper for the front curtain unit 3 and the rear curtain unit 4 when running is completed. The blade stopper 5 is mainly made of an elastic member such as rubber. A front curtain drive lever unit 6 is rotatably attached to the shutter base plate 1 at a rotation center 601a. The front-curtain drive lever unit 6 has a front-curtain drive lever (first drive member) 601 , a front-curtain drive spring 602 , and a front-curtain detection PI 603 .

A drive shaft 601 b of the front-curtain drive lever 601 passes through a hole 305 b of the front-curtain blade arm 305 and transmits power to the front-curtain unit 3 . As a result, the front-curtain drive lever 601 can drive the front-curtain blades 301-304. The front curtain drive spring 602 has a fixed end attached to the shutter base plate 1 and a movable end attached to the front curtain drive lever 601 . As a result, power for driving the front curtain unit 3 can be transmitted to the front curtain drive lever 601 . A front curtain detection (detection means) PI 603 is attached to the shutter base plate 1 and detects the positions of the front curtain blades 301 to 304 . The front curtain detection PI 603 is U-shaped (not shown), detects a signal by passing through the position detection units 601c and 601d of the front curtain drive lever 601, and sends the signal to a control unit (control means) 2007 (see FIG. 5). transmit a signal. 7 is a trailing blade drive lever unit. Since the configuration of the trailing blades-drive lever unit 7 is the same as that of the leading blades-drive lever unit 6, the description thereof will be omitted.

A set lever unit 8 has a set lever (second driving member) 801 and a set lever return spring 802 . When the set lever 801 rotates, it rotates the front-curtain drive lever 601 and the rear-curtain drive lever 701 to move the front-curtain unit 3 and the rear-curtain unit 4 to the set position. A fixed end of the set lever return spring 802 is attached to the shutter base plate 1 , and a movable end of the set lever return spring 802 is attached to the set lever 801 . When the setting is released, the set lever 801 is retracted from the driving range of the leading blade-drive lever unit 6 and the trailing blade-drive lever unit 7 by the biasing force of the set lever return spring 802 .

A shutter charge unit 9 includes a motor 901, a phase plate 902, a charge cam 903, a charge lever 904, and a gear train (not shown). Phase plate 902 transmits a control signal to control section 2007 (see FIG. 5) using the rotational phase of charge cam 903 as a signal. A motor 901 drives a charge lever 904 via a gear train (not shown) and a charge cam 903 . As will be described later, the charge lever 904 transmits power of the motor 901 to the set lever 801 .

A front curtain brake unit 11 has a brake lever 1101 and a brake spring 1102 . The brake lever 1101 is attached to the shutter base plate 1 so as to be rotatable around a rotation center 1101c. A fixed end of the brake spring 1102 is attached to the shutter base plate 1 and a movable end of the brake spring 1102 is attached to the brake lever 1101 . As will be described later, due to the biasing force of the brake spring 1102, the leading curtain unit 3 that is running receives braking force and decelerates.

In the shutter device 100 of this embodiment, the light shielding curtains (front curtain blades 301 to 304) close the exposure aperture (shooting area) in the standby state (set state). It moves so as to retreat from the exposure aperture at the beginning.

Next, the operation of shutter device 100 in the normal mode will be described with reference to FIGS. 3A and 3B. 3A and 3B are explanatory diagrams of the operation of the shutter device 100 in normal mode. In the shutter device 100, the front curtain unit 3 and the rear curtain unit 4 move respectively.

FIG. 3A(1) is an explanatory diagram of the shutter device 100 in the set state. As shown in FIG. 3A(1), the set lever 801 is biased in the counterclockwise direction on the paper surface by the biasing force of the set lever return spring 802 about the center of rotation 801a. Also, the set lever 801 is in contact with the contact portion 904 b of the charge lever 904 . The charge lever 904 receives an urging force due to this contact and tries to rotate in the right rotation direction in the drawing about the center of rotation 904c. there is The front-curtain drive lever 601 is urged by a front-curtain drive spring 602 in a clockwise rotation direction on the paper surface about a rotation center 601a. Further, the rotation of the front curtain drive lever 601 is suppressed by contacting the set lever 801 at the contact portion 601e.

When the motor 901 rotates from the set state shown in FIG. 3A(1) and the rotation of the motor 901 is completed, the state shifts to the state shown in FIG. 3A(2). FIG. 3A(2) is an explanatory diagram of the shutter device 100 in the set release state. The rotation of the motor 901 causes the charge cam 903 to rotate, releasing the suppression of rotation of the charge lever 904 . As a result, the charge lever 904 rotates about the center of rotation 904c in the right rotation direction on the paper surface and comes into contact with the lever bounce suppressing portion 1b to stop. Further, in the set release state, the front curtain unit 3 and the front curtain drive lever unit 6 are locked by a tightening mechanism (not shown) and held in the locking position. The shutter device 100 of the present embodiment has a tensioning mechanism that releases locking of tensioning by an electromagnetic actuator. Since the mechanism is publicly known, the explanation is omitted.

When the locking mechanism is released, the front curtain unit 3 starts running and shifts to the state shown in FIG. 3B(1). FIG. 3B(1) is an explanatory diagram of a state in which the front curtain unit 3, which is running, starts to be braked and decelerates. The shutter device 100 of this embodiment has a mechanism for reducing the running speed immediately before the front curtain unit 3 completes running. Immediately before the front curtain unit 3 completes traveling, the brake lever 1101 and the drive shaft 601b of the front curtain drive lever 601 come into contact with each other. As a result, the biasing force of the brake spring 1102 is transmitted to the front curtain unit 3, and the traveling of the front curtain unit 3 is decelerated.

FIG. 3B(2) is an explanatory diagram of the state at the moment when the leading blades 301 to 304 of the leading blade unit 3 collide with the blade stopper 5 and the traveling of the leading blades 301 to 304 is finished. The front curtain unit 3 that has collided with the blade stopper 5 makes a loud collision sound.

Next, the operation of the shutter device 100 in the low speed mode will be described with reference to FIGS. 4A and 4B. 4A and 4B are explanatory diagrams of the operation of the shutter device 100 in low speed mode. FIG. 4A(1) is an explanatory diagram of the shutter device 100 in the set state. In addition, since the set state shown in FIG. 4A(1) is the same as that in FIG. 3A(1), the description thereof is omitted. In the low speed mode, when the motor 901 is rotated from the set state of FIG. 4A(1) at a lower speed than in the normal mode, the state is shifted to the state of FIG. 4A(2). FIG. 4A(2) is a diagram showing the state immediately before the front curtain unit 3 starts running in the low speed mode. 4A(1) to FIG. 4A(2), the tensioning mechanism (not shown) is released, and the front curtain unit 3 shifts to a travelable state.

When the front curtain unit 3 starts traveling from the state of FIG. 4A(2), the state shifts to the state of FIG. 4B(1). FIG. 4B(1) shows a state in which the front curtain unit 3 is running. Due to the low speed rotation of the motor 901, the charge lever 904 starts to rotate in the clockwise direction on the paper surface around the center of rotation 904c. The charge lever 904 receives an urging force from the abutting portion 904b with the set lever 801 so as to rotate further in the right rotation direction on the paper surface, but the charge cam 903 suppresses the rotation. That is, the charge lever 904 rotates along with the rotation of the charge cam 903 . The set lever 801 receives a rotational biasing force from the contact portion 601 e of the front curtain drive lever 601 in the left rotation direction of the drawing, but the contact portion 904 b of the charge lever 904 suppresses the rotation. That is, the set lever 801 rotates along with the rotation of the charge cam 903 . The front-curtain drive lever 601 receives a rotational biasing force in the direction of right rotation on the paper surface about the center of rotation 601a by the biasing force of the front-curtain drive spring 602, but the rotation is restricted by the set lever 801 that contacts the contact portion 601e. . That is, the leading drive lever 601 rotates along with the rotation of the charge cam 903 .

FIG. 4B(2) is an explanatory diagram of the state when the front curtain unit 3 during running starts to be braked. Immediately before the front curtain unit 3 completes traveling, the brake lever 1101 and the drive shaft 601 b of the front curtain drive lever 601 contact each other, whereby the biasing force of the brake spring 1102 is transmitted to the front curtain unit 3 . When the running front curtain unit 3 starts to be braked, the running direction and running speed of the front curtain unit 3 are determined according to the magnitude relationship between the first kinetic energy and the second kinetic energy. Here, the first kinetic energy is the kinetic energy that causes the front curtain unit 3 to travel from top to bottom in FIG. The second kinetic energy is composed of the biasing force of the brake spring 1102, the inertial force of the brake lever 1101, and the frictional force generated by the contact between the brake lever 1101 and the drive shaft 601b of the front curtain drive lever 601. is the kinetic energy that pushes up from the bottom.

That is, if the first kinetic energy>second kinetic energy (conditional expression (1)) is satisfied, the state (running completion state) of FIG. 4B(3) is entered. On the other hand, when the first kinetic energy<second kinetic energy (conditional expression (2)) is satisfied, the front curtain unit 3 stops without transitioning to the travel completion state of FIG. 4B(3). When the conditional expression (2) is satisfied, the rotational speed of the motor 901 is increased immediately before the brake is applied to the front curtain unit 3 to increase the inertial force of the front curtain unit 3, thereby satisfying the conditional expression (1). can be adjusted as follows. That is, in the low speed mode, the control unit 2007 rotates the motor 901 at a second rotation speed lower than the first rotation speed in the high speed mode, and then rotates the motor 901 at a third rotation speed different from the second rotation speed. , the motor 901 is rotated to run the leading blades 301-304. Also, the relationship between the first kinetic energy and the second kinetic energy changes according to the temperature. Therefore, the rotation speed of the motor 901 may be changed according to the ambient temperature of the shutter device 100 . Also, the relationship between the first kinetic energy and the second kinetic energy changes according to the number of times the shutter device 100 is operated. Therefore, the rotation speed of the motor 901 may be changed according to the number of times the shutter device 100 is operated.

FIG. 4B(3) is an explanatory diagram of the state at the moment when the front curtain blades 301 to 304 of the front curtain unit 3 collide with the blade stopper 5 and the front curtain finishes running (running completed state). In the shutter device 100 of the present embodiment, the speed at which the leading blades 301 to 304 collide with the blade stopper 5 is lower in the low speed mode than in the normal mode (see FIGS. 3A and 3B). Therefore, collision noise is reduced in the low speed mode compared to the normal mode.

Next, referring to FIG. 5, the imaging device of this embodiment will be described. FIG. 5 is an explanatory diagram of the imaging device 2000. As shown in FIG. The imaging device 2000 has a shutter device 100 . 5A is a front view of the imaging device 2000, FIG. 5B is a rear view of the imaging device 2000, and FIG. 5C is a perspective view of the imaging device 2000. FIG.

2001 is an imaging device such as a CMOS sensor or a CCD sensor. An imaging device 2001 photoelectrically converts a subject image (optical image) formed via a photographing lens (imaging optical system) 2006 and outputs image data. A mount 2002 is an interface for attaching an imaging lens 2006 to the imaging apparatus 2000 . 2003 is a release button, and when the release button 2003 is pressed, the imaging apparatus 2000 performs an imaging operation. In addition, since the imaging operation is publicly known, its detailed description is omitted. Reference numeral 2007 denotes a control unit (shutter control unit, control means) that controls the operation of each unit such as the shutter device 100 provided in the imaging apparatus 2000 . A control unit 2007 is included in the shutter device 100 .

A rear monitor (display unit) 2004 is used for confirming captured images and live view images. 2005 is a live view button. When the live view button 2005 is pressed, the live view mode is entered. Here, the live view mode is a mode for confirming an image (captured image) captured by the image pickup element 2001 mounted on the image pickup apparatus 2000 on the rear monitor 2004 in real time. In the live view mode, the front curtain unit 3 has completed running, and the light from the photographing lens 2006 is always incident on the image sensor 2001 .

In this embodiment, an imaging system is configured by an imaging device (camera body) 2000 and an imaging lens (interchangeable lens) 2006 detachable from the imaging device 2000 . However, the present invention is not limited to this, and can also be applied to an imaging apparatus in which a camera body and a photographing lens are integrally constructed.

Next, with reference to FIG. 6, the operation of the imaging device 2000 at the time of transition to live view will be described. FIG. 6 is a flow chart showing the operation of the imaging device 2000 when shifting to live view. Each step in FIG. 6 is executed by each part of the shutter device 100 mainly based on commands from the control part 2007 .

First, in step S6001, when the user presses the live view button 2005 (the live view button is turned ON), the imaging apparatus 2000 (control unit 2007) starts transitioning to the live view state. Subsequently, in step S6002, the control unit 2007 determines whether the normal mode is set, that is, whether the normal mode or the low speed mode is selected. If the normal mode is set, the process advances to step S6003. On the other hand, if the low speed mode is set, the process proceeds to step S6010.

In step S6003, since the normal mode is set, the control unit 2007 rotates the motor 901 at high speed in order to shift the shutter device 100 from the set state to the set release state (see FIG. 3A(1)). Subsequently, in step S6004, the control unit 2007 completes the rotation of the motor 901 that started rotating in step S6003, and shifts to the set release state (see FIG. 3B(2)). Subsequently, in step S6005, the control unit 2007 unlocks the tightening mechanism (not shown). Subsequently, in step S6006, the front curtain unit 3 starts running because the locking of the tensioning mechanism is released in step S6007. Subsequently, in step S6007, the running front curtain unit 3 begins to brake and decelerate (see FIG. 3B(1)). Subsequently, in step S6008, the running of the front curtain unit 3 is completed (see FIGS. 3B(2) and 4B(3)). Subsequently, in step S6009, the control unit 2007 starts live view mode.

On the other hand, if the low speed mode is set in step S6002, the control unit 2007 rotates the motor 901 of the shutter device 100 in the set state at low speed in step S6010 (see FIG. 4A(1)). Here, the rotation of motor 901 in step S6010 is preferably slower than the rotation of motor 901 in step S6003. Further, in this embodiment, the rotation direction of the motor 901 is the same between the normal mode and the low speed mode, but the rotation direction may be changed depending on the mode. Subsequently, in step S6011, the tightening mechanism is unlocked. Subsequently, in step S6012, since the tensioning mechanism was released in step S6011, the front curtain unit 3 starts running. In the low speed mode, the front curtain unit 3 travels along with the rotation of the charge cam 903, as described with reference to FIG. 4B(1). Subsequently, in step S6013, the running front curtain unit 3 begins to brake and decelerate ((2) in FIG. 4B).

Subsequently, in step S6014, the control unit 2007 determines whether or not the first kinetic energy>second kinetic energy (conditional expression (1)) is satisfied. If the conditional expression (1) is satisfied, the process advances to step S6008, and the front curtain unit 3 enters the travel completion state. On the other hand, if the conditional expression (1) is not satisfied in step S6014 (that is, if the conditional expression (2) is satisfied), the process proceeds to step S6015. In step S6015, the control unit 2007 changes the rotation speed of the motor 901 so that the state of conditional expression (2) can be shifted to the state of conditional expression (1). Subsequently, in step S6008, the front curtain unit 3 enters the travel completion state (see FIGS. 3B(2) and 4B(3)).

In this manner, the control means (control section 2007) changes the operation of the first drive member (front drive lever 601) according to the mode. Preferably, the control means can be set to one mode selected from a plurality of modes including a first mode (high speed mode) and a second mode (low speed mode). The light shielding curtains (front curtain blades 301 to 304) travel at a first travel speed (high speed) in the first mode, and travel at a second travel speed (lower than the first travel speed) in the second mode. low speed). More preferably, the control means rotates the motor 901 at a first rotation speed (high-speed rotation) in the first mode, and rotates the motor 901 at a second rotation speed lower than the first rotation speed in the second mode. to rotate the motor 901 (low-speed rotation). More preferably, the shading curtain starts running after the motor 901 completes rotation at the first rotation speed in the first mode, and stops after the motor 901 rotates at the second rotation speed in the second mode. It runs accordingly (synchronizing with the rotation of the motor). Preferably, the second drive member (set lever 801) transmits the power of the motor 901 to the first drive member to drive the first drive member to the set position so that the light shielding curtain can travel. In the released state, the first driving member is retracted from the rotation range (imaging area). In the second mode, the light-shielding curtain starts running before the second drive member completes the set release operation. More preferably, the second driving member operates in the first mode so as to drive the first driving member and the light shielding curtain according to the rotation of the second driving member in the set release state in the second mode. at a second drive speed that is lower than the first drive speed at .

As described above, in the shutter device 100, the speed at which the leading blades 301 to 304 collide with the blade stopper 5 is lower in the low speed mode than in the normal mode (see FIGS. 3A and 3B). Therefore, collision noise is reduced in the low speed mode compared to the normal mode. Therefore, according to this embodiment, the user can switch to the live view mode without making a loud noise. In addition, in the low speed mode, the front curtain unit 3 collides with the blade stopper 5 while traveling at a lower speed than in the normal mode. is. In this embodiment, the transition to the live view mode has been described, but the present invention is not limited to this. The present invention does not require high-speed movement of the light shielding curtain, for example, when switching from a still image shooting mode to a moving image shooting mode, when the power of the imaging device that starts live view when the power is turned on, or when shooting with a long-second bulb. It is also effective in other situations.

According to this embodiment, it is possible to suppress the generation of noise and the deterioration of the durability of the shutter device due to the movement of the light shielding curtain.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist.

100 shutter devices 301, 302, 303, 304 front curtain blade (light shielding curtain)
601 front curtain drive lever (first drive member)
2007 control unit (control means)

Claims (11)

a light-shielding curtain that closes an exposure aperture in a standby state and retracts from the exposure aperture when the standby state is shifted to a live view state;
a first drive member that drives the light shielding curtain;
a control means for controlling the first drive member;
The control means can be set to one mode selected from a plurality of modes including a first mode and a second mode, and by changing the operation of the first driving member according to the mode, The running speed of the light shielding curtain can be changed,
The light shielding curtain runs at a first running speed in the first mode, and runs at a second running speed lower than the first running speed in the second mode,
the second mode is a mode selected when the light shielding curtain shifts from the standby state to the live view state ;
In the second mode, after traveling at the second travel speed, the light shielding curtain travels at a speed higher than the second travel speed before the light shielding curtain completes travel for retracting from the exposure opening. run at high speed
A shutter device characterized by: further comprising a motor for moving the first drive member;
The control means is
rotating the motor at a first rotational speed in the first mode;
2. A shutter device according to claim 1, wherein in said second mode, said motor is rotated at a second rotation speed lower than said first rotation speed. The light shielding curtain is
In the first mode, starting running after the motor completes rotation at the first rotational speed;
3. The shutter device according to claim 2, wherein in said second mode, the shutter device travels according to the rotation of said motor at said second rotational speed. further comprising a second drive member;
The second drive member is
transmitting power of the motor to the first drive member to drive the first drive member to a set position;
retreating from the rotation range of the first driving member in a set release state in which the light shielding curtain can travel;
4. A shutter device according to claim 2, wherein, in said second mode, said light shielding curtain starts running before completion of the set releasing operation by said second driving member. The second drive member drives the first drive member and the light shielding curtain in response to rotation of the second drive member in the set release state in the second mode. 5. The shutter device according to claim 4, wherein the shutter rotates at a second drive speed lower than the first drive speed in mode 1. In the second mode, the control means rotates the motor at the second rotation speed, and then rotates the motor at a third rotation speed lower than the first rotation speed and higher than the second rotation speed . 6. The shutter device according to any one of claims 2 to 5, wherein the motor is rotated at a rotational speed to move the light shielding curtain. further comprising detection means for detecting the position of the light shielding curtain,
7. The apparatus according to any one of claims 2 to 6, wherein said control means changes the rotation speed of said motor based on the position of said light shielding curtain detected by said detection means in said second mode. Shutter device as described. 8. A shutter device according to claim 2, wherein said control means changes the rotation speed of said motor according to temperature. 9. The shutter device according to claim 2, wherein said control means changes the rotational speed of said motor according to the number of times said shutter device is operated. an imaging device;
An imaging apparatus comprising the shutter device according to any one of claims 1 to 9. a light shielding curtain that closes an exposure aperture in a standby state, and retracts from the exposure aperture when the standby state is shifted to a live view state; a first driving member that drives the light shielding curtain; A control method for a shutter device having control means for controlling a driving member of
The shutter device can be driven in one mode selected from a plurality of modes including a first mode and a second mode,
determining the mode;
changing the traveling speed of the light shielding curtain by changing the operation of the first driving member according to the mode;
The light shielding curtain runs at a first running speed in the first mode, and runs at a second running speed lower than the first running speed in the second mode,
the second mode is a mode selected when the light shielding curtain shifts from the standby state to the live view state ;
In the second mode, after traveling at the second travel speed, the light shielding curtain travels at a speed higher than the second travel speed before the light shielding curtain completes travel for retracting from the exposure opening. run at high speed
A control method for a shutter device, characterized by:

Images