WO2015056435A1 - Imaging apparatus - Google Patents
Imaging apparatus Download PDFInfo
- Publication number
- WO2015056435A1 WO2015056435A1 PCT/JP2014/005184 JP2014005184W WO2015056435A1 WO 2015056435 A1 WO2015056435 A1 WO 2015056435A1 JP 2014005184 W JP2014005184 W JP 2014005184W WO 2015056435 A1 WO2015056435 A1 WO 2015056435A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- open position
- closed position
- curtain
- stepping motor
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/36—Sliding rigid plate
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2217/00—Details of cameras or camera bodies; Accessories therefor
- G03B2217/005—Blur detection
Definitions
- the present disclosure relates to an imaging apparatus including a mechanical shutter.
- Patent Document 1 discloses an imaging apparatus that realizes exposure by using both a mechanical shutter and an electronic shutter.
- This disclosure provides an imaging apparatus that can reduce malfunction of the curtain mechanism while suppressing an increase in the temperature of the actuator.
- An imaging apparatus includes a cover having an opening, a curtain mechanism that is held by the cover and moves between a closed position that shields the opening and an open position that opens the opening, and the curtain mechanism.
- the control unit turns on the actuator when the sensor detects acceleration equal to or greater than a predetermined value in the standby state, and the control unit moves the curtain mechanism to the closed position corresponding to the standby state. Or hold in the open position.
- the imaging device can reduce malfunction of the curtain mechanism while suppressing an increase in the temperature of the actuator.
- FIG. 5 is a cross-sectional view of the mechanical shutter taken along line AA in FIG. 4. It is a front view of the mechanical shutter of an open state. It is a schematic diagram of a long hole. It is a figure for demonstrating the example of control of a camera controller. It is a flowchart of standby control of a camera controller. It is a flowchart of exposure control of a camera controller. It is explanatory drawing of the excitation operation
- FIG. 1 is an external view of the digital camera 100.
- the digital camera 100 includes an interchangeable lens 101 and a camera body 102 to which the interchangeable lens 101 can be attached.
- the camera body 102 includes a release button 160.
- the camera body 102 receives a half-press operation by the user of the release button 160, the camera body 102 transmits a control signal to the interchangeable lens 101 so as to perform an autofocus operation.
- the camera body 102 receives an operation by the user of the release button 160, the camera body 102 performs a photographing operation of a subject image formed via the interchangeable lens 101.
- the digital camera 100 is an example of an imaging device.
- FIG. 2 is a rear view of the digital camera 100 (camera body 102).
- the camera body 102 includes a liquid crystal monitor 163, a touch panel 162, a camera side operation unit 170 including a center button 204 and a cross button 205 on the back surface.
- the camera body 102 receives operations by the user of the touch panel 162 and the camera side operation unit 170, and performs various controls according to the operation contents.
- FIG. 3 is a block diagram showing the configuration of the digital camera 100 (interchangeable lens 101 and camera body 102).
- the interchangeable lens 101 includes an optical system including a lens controller 120, a lens mount 130, a focus lens 110, and a zoom lens 112, a focus lens driving unit 111, a focus ring 114, a zoom lens driving unit 113, a zoom ring 115, an aperture 116, and an aperture drive.
- the camera body 102 includes a camera controller 153, a body mount 140, a CMOS image sensor 150, a timing generator 151, an analog front end 152, a liquid crystal monitor 163, a touch panel 162, a release button 160, a camera side operation unit 170, a power supply 154, a DRAM 155, and a flash.
- a memory 156, a mechanical shutter 157, an acceleration sensor 158, a card slot 165, a memory card 164, and the like are provided.
- the lens system includes a focus lens 110 and a zoom lens 112, and collects light from the subject.
- the zoom lens 112 is driven by a zoom lens driving unit 113.
- the zoom lens driving unit 113 drives the zoom lens 112 according to the operation of the zoom ring 115.
- the focus lens 110 is driven by a focus lens driving unit 111.
- the focus lens driving unit 111 drives the focus lens 110 in response to an operation of the focus ring 114 or a control signal from the camera controller 153.
- the diaphragm 116 adjusts the amount of light that passes through the lens system and enters the CMOS image sensor 150.
- the diaphragm 116 is driven by the diaphragm driver 117.
- the aperture driving unit 117 drives the aperture 116 in accordance with a control signal from the camera controller 153.
- the lens controller 120 controls the entire interchangeable lens 101.
- the lens controller 120 may be realized by a processor such as a microcomputer or a hard-wired circuit.
- the lens controller 120 reads out lens data stored in the flash memory 122 and transmits it to the camera controller 153.
- the camera controller 153 controls the entire digital camera 100 such as the CMOS image sensor 150 in accordance with an instruction from the release button 160 or the camera side operation unit 170.
- the camera controller 153 transmits a vertical synchronization signal to the timing generator 151.
- the camera controller 153 generates an exposure synchronization signal based on the vertical synchronization signal.
- the camera controller 153 periodically and repeatedly transmits the generated exposure synchronization signal to the lens controller 120 via the body mount 140 and the lens mount 130.
- the camera controller 153 is connected to the DRAM 155 and the flash memory 156, and can write and read information as necessary.
- the camera controller 153 may be configured with a hard-wired electronic circuit or a processor such as a microcomputer using a program.
- the camera controller 153 is an example of a control unit.
- the DRAM 155 is used as a work memory for various controls by the camera controller 153.
- the flash memory 156 stores programs, parameters, and the like used for various controls by the camera controller 153.
- the CMOS image sensor 150 captures a subject image incident through the interchangeable lens 101 and generates image information.
- the generated image information is converted from analog format data to digital format data by the AFE 152.
- the image information digitized by the AFE 152 is subjected to various image processing by the camera controller 153. Examples of the various types of image processing include gamma correction processing, white balance correction processing, scratch correction processing, YC conversion processing, electronic zoom processing, and JPEG compression processing, but are not limited thereto.
- another imaging element such as an NMOS image sensor or a CCD image sensor may be used instead of the CMOS image sensor 150.
- the CMOS image sensor 150 operates at a timing controlled by the timing generator 151.
- the operation of the CMOS image sensor 150 controlled by the timing generator 151 includes a still image capturing operation, a through image capturing operation, a data transfer operation, an electronic shutter operation, and an electronic front curtain operation.
- the through image is mainly a moving image and is displayed on the liquid crystal monitor 163 in order to determine a composition for capturing a still image.
- the mechanical shutter 157 switches between blocking and passing light entering the CMOS image sensor 150 through the lens system. That is, the mechanical shutter 157 adjusts the amount of light hitting the CMOS image sensor 150 in terms of time.
- the mechanical shutter 157 is controlled by the camera controller 153.
- the mechanical shutter 157 is an example of a shutter mechanism. The detailed configuration of the mechanical shutter 157 will be described later.
- the acceleration sensor 158 is a sensor that detects the acceleration of the camera body 102.
- the acceleration sensor 158 outputs the detected acceleration to the camera controller 153.
- the acceleration sensor 158 may be a triaxial acceleration sensor.
- the acceleration sensor 158 is an example of a sensor.
- the body mount 140 is a connecting member that mechanically and electrically connects the interchangeable lens 101 and the camera body 102 together with the lens mount 130 included in the interchangeable lens 101.
- the lens controller 120 and the camera controller 153 are in a communicable state.
- the body mount 140 transmits the exposure synchronization signal and other control signals received from the camera controller 153 to the lens controller 120 via the lens mount 130.
- the body mount 140 transmits a signal received from the lens controller 120 via the lens mount 130 to the camera controller 153.
- Release button 160 accepts user operations.
- the release button 160 is operated in two stages, half-press and full-press.
- camera controller 153 performs an autofocus operation.
- the camera controller 153 performs shooting according to the full press operation, and stores the generated image information in the memory card 164.
- the camera side operation unit 170 is a general term for operation members including the above-described center button 204 and cross button 205.
- the camera-side operation unit 170 includes a switch for switching between MF (Manual Focus) / AF (Autofocus).
- MF Manual Focus
- AF Automatic focus
- the camera controller 153 executes various controls according to the operation instruction content.
- FIG. 4 is a front view of the mechanical shutter 157 in the closed state.
- FIG. 5 is a cross-sectional view of the mechanical shutter 157 taken along line AA in FIG.
- FIG. 6 is a front view of the mechanical shutter 157 in the open state.
- ⁇ Mechanical shutter 157 alternatively performs aperture opening and closing operations with a single curtain unit.
- the mechanical shutter 157 when the mechanical shutter 157 performs a shutter operation, it selectively functions as either the front curtain or the rear curtain. That is, the mechanical shutter 157 opens and closes the aperture 211c without forming a slit like a focal plane shutter having both a front curtain and a rear curtain.
- the mechanical shutter 157 includes a cover 211, a curtain unit 212, a drive arm 213, a driven arm 214, a stepping motor 215, a close detection switch 216, an open detection switch 217, and a snap action mechanism 218.
- the curtain unit 212 includes a first blade 212a and a second blade 212b.
- the curtain unit 212 is an example of a curtain mechanism.
- the cover 211 has a front cover 211a and a rear cover 211b, and has a plate-like shape as a whole.
- the cover 211 houses the first blade 212a, the second blade 212b, the drive arm 213, the driven arm 214, the close detection switch 216, and the open detection switch 217.
- the cover 211 is formed with a rectangular aperture 211c. Specifically, an aperture 211c is formed in both the front cover 211a and the rear cover 211b.
- the aperture 211 c has a size that does not block light that passes through the interchangeable lens 101 and enters the CMOS image sensor 150.
- the aperture 211c is formed in an approximately 2/3 region on the upper side in the vertical direction of the cover 211. That is, the aperture 211c is not provided in a substantially 1 / area below the cover 211.
- the aperture 211c is an example of an opening.
- Stepping motor 215 drives drive arm 213 to rotate.
- the stepping motor 215 is attached to the rear cover 211b at a position below the aperture 211c and shifted laterally from the aperture 211c.
- the stepping motor 215 is an example of an actuator.
- the first blade 212a and the second blade 212b open and close the aperture 211c of the cover 211.
- the first blade 212a and the second blade 212b are substantially rectangular plate-shaped members.
- the first blade 212a and the second blade 212b are large enough to shield the aperture 211c in a state where they are aligned vertically with no gap between them. In a state where the first blade 212a and the second blade 212b are overlapped with each other, the aperture 211c is opened, and the first blade 212a and the second blade 212b are accommodated in an approximately 1/3 region below the cover 211.
- One end of the drive arm 213 is attached to the rotating shaft of the stepping motor 215. That is, the drive arm 213 is rotationally driven by the stepping motor 215.
- a first blade 212 a is rotatably connected to the other end of the drive arm 213.
- the second blade 212b is rotatably connected to the intermediate portion of the drive arm 213.
- One end of the driven arm 214 is rotatably connected to a portion of the rear cover 211b that is on the side of the aperture 211c and above the stepping motor 215.
- a first blade 212 a is rotatably connected to the other end of the driven arm 214.
- the second blade 212b is rotatably connected to the intermediate portion of the driven arm 214.
- the driven arm 214 is connected to the first blade 212a and the second blade 212b at a position above the drive arm 213.
- the first blade 212a, the second blade 212b, the drive arm 213, and the driven arm 214 constitute a link mechanism.
- the drive arm 213 is rotationally driven by the stepping motor 215, the first blade 212a, the second blade 212b, and the driven arm 214 move in conjunction with the rotation of the drive arm 213.
- the first blade 212a and the second blade 212b move between a closed position that shields the aperture 211c and an open position that opens the aperture 211c. In the closed position, the first blades 212a and the second blades 212b are lined up and down without any gap and completely shield the aperture 211c.
- the first blade 212a and the second blade 212b overlap each other and are accommodated in the cover 211 to open the aperture 211c. Since the open position is located below the aperture 211c, the first blade 212a and the second blade 212b shield the aperture 211c from below to above.
- the direction in which the first blade 212a and the second blade 212b go to the open position is referred to as the open direction
- the direction in which the first blade 212a and the second blade 212b go to the closed position Is referred to as the closing direction.
- the state where the first blade 212a and the second blade 212b are located at the open position is referred to as an open state
- the state where the first blade 212a and the second blade 212b are located at the closed position is referred to as a closed state.
- the close detection switch 216 detects that the first blade 212a and the second blade 212b are in the closed position (closed state). Specifically, the driven arm 214 is provided with a protrusion 214c. And the close detection switch 216 is provided in the position which can detect the protrusion part 214c when the 1st blade
- the open detection switch 217 detects that the first blade 212a and the second blade 212b are in the open position (open state). Specifically, the drive arm 213 is provided with a protrusion 213a. An open detection switch 217 is provided at a position where the protrusion 213a can be detected when the first blade 212a and the second blade 212b are in the open position.
- the close detection switch 216 and the open detection switch 217 are optical sensors (a photo interrupter or a photo reflector), and detect a closed state or an open state by blocking or reflecting light.
- the stepping motor 215 may be replaced with an electromagnetic actuator such as a meter, a plunger or a DC motor, or an ultrasonic actuator.
- the snap action mechanism 218 biases the driven arm 214 to maintain the first blade 212a and the second blade 212b in the open position when the first blade 212a and the second blade 212b are in the open position, When the first blade 212a and the second blade 212b are in the closed position, the driven arm 214 is urged so as to maintain the first blade 212a and the second blade 212b in the closed position.
- the snap action mechanism 218 includes a first engagement portion 211d provided on the rear cover 211b, a second engagement portion 214b provided on the driven arm 214, a first engagement portion 211d, and a second engagement portion 214b. And an urging spring 218a coupled to the.
- the rear cover 211b is formed with an arc-shaped long hole 211e through which the second engagement portion 214b passes when the driven arm 214 rotates.
- the urging spring 218a is a torsion coil spring having a coiled part and two arms extending from the coiled part. One arm of the biasing spring 218a is held by the first engaging portion 211d, and the other arm of the biasing spring 218a is held by the second engaging portion 214b. In this state, the urging spring 218a is in a state where the coil-shaped portion is wound up, and generates an elastic force in a direction to separate the first engaging portion 211d and the second engaging portion 214b from each other. Yes.
- the biasing spring 218a is an example of a biasing portion.
- the first engaging portion 211d is provided in the vicinity of the long hole 211e and on the opposite side of the long hole 211e from the rotation center of the driven arm 214.
- FIG. 7 is a schematic diagram of the long hole 211e.
- the total length of the long hole 211e corresponds to the moving range between the open position and the closed position of the first blade 212a and the second blade 212b.
- the second engagement portion 214b is positioned at one end portion of the elongated hole 211e (hereinafter referred to as “open end portion”).
- the second engagement portion 214b is located at the other end portion (hereinafter referred to as “closed end portion”) of the long hole 211e.
- the biasing spring 218a biases the second engagement portion 214b toward the open end portion.
- the biasing spring 218a biases the second engagement portion 214b toward the closed end portion.
- the biasing spring 218a causes the second engagement portion 214b to open and No bias is applied to any of the closed ends.
- the urging spring 218a switches the direction of the urging force between the first region S1 and the second region S2 with the third region S3 as a boundary.
- the second engagement portion 214b starts to move from the open end portion of the long hole 211e toward the closed end portion.
- the distance from the 2nd engaging part 214b to the 1st engaging part 211d becomes short gradually.
- the second engagement portion 214b comes closest to the first engagement portion 211d in the third region S3 of the long hole 211e.
- the urging spring 218a has a coiled portion wound up, and generates an elastic force in a direction in which the first engaging portion 211d and the second engaging portion 214b are separated from each other. That is, the urging spring 218a generates the largest elastic force when the first engagement portion 211d and the second engagement portion 214b are closest to each other.
- the second engaging portion 214d is positioned in the third region S3 of the long hole 211e, the component of the elastic force in the circumferential direction of the long hole 211e is small, so the second engaging portion 214b is the open end portion.
- first blade 212a and the second blade 212b do not move to either the open position or the closed position.
- the second engaging portion 214d is positioned in the first region S1 of the long hole 211e, the component of the elastic force in the circumferential direction of the long hole 211e increases, and the circumferential direction of the long hole 211e increases. Since the component is directed toward the open end, the second engagement portion 214b is urged toward the open end. That is, the first blade 212a and the second blade 212b are urged toward the open position.
- the second engagement portion 214d when the second engagement portion 214d is positioned in the second region S2 of the long hole 211e, the component in the circumferential direction of the long hole 211e is increased and the component in the circumferential direction is included in the elastic force. Since it faces toward the closed end, the second engagement portion 214b is urged toward the closed end. That is, the first blade 212a and the second blade 212b are urged toward the closed position.
- the biasing spring 218a is The driven arm 214 is urged so that the second engagement portion 214b is moved toward the open end, that is, the first blade 212a and the second blade 212b are located at the open position.
- the biasing spring 218a moves the second engagement portion 214b toward the closed end, that is, the first blade 212a and the second The driven arm 214 is urged so that the two blades 212b are located at the closed position.
- the driven arm 214 is biased by the biasing spring 218a in the direction in which the first blade 212a and the second blade 212b move to the open position.
- the driven arm 214 is biased by the biasing spring 218a in the direction in which the first blade 212a and the second blade 212b move to the closed position.
- the stepping motor 215 is off (during non-energization), since the driven arm 214 is urged by the urging spring 218a, the first blade 212a and the second blade 212b are in the open position or the closed position. Held in position.
- the stepping motor 215 is off.
- the stepping motor 215 is turned off after the first blade 212a and the second blade 212b are moved to the open position. Even in such a case, the first blade 212a and the second blade 212b are held in the open position by the biasing force of the biasing spring 218a.
- the urging force for the open position is weaker than the urging force for the closed position.
- the urging force of the urging spring 218a is generally in the direction of a straight line connecting the first engaging portion 211d and the second engaging portion 214b.
- biasing spring 218a urges
- the component in the circumferential direction of the long hole 211e when the second engagement portion 214b is located at the closed end portion is the component of the long hole 211e when the second engagement portion 214b is located at the open end portion.
- the posture of the biasing spring 218a is set so as to be stronger than the component in the circumferential direction. Therefore, the urging force with respect to the open position of the snap action mechanism 218 is weaker than the urging force with respect to the closed position.
- the tip of the drive arm 213 contacts the lower edge 211f of the cover 211. That is, the lower end edge portion 211f of the cover 211 functions as a stopper. As shown in FIG. 5, the lower end edge portion of the rear cover 211b is bent so that the tip end portion of the drive arm 213 comes into contact therewith.
- the stepping motor 215 positions the first blade 212a and the second blade 212b in the open position, the stepping motor 215 rotates the drive arm 213 to a position where the tip end portion of the drive arm 213 contacts the lower end edge portion 211f of the cover 211. In the standby state, the front end of the drive arm 213 is in contact with the lower end edge 211f of the cover 211 by the biasing force of the biasing spring 218a.
- the tip of the driven arm 214 contacts the upper edge 211g of the cover 211. That is, the upper end edge 211g of the cover 211 functions as a stopper. As shown in FIG. 5, the upper edge of the rear cover 211b is bent so that the tip of the driven arm 214 comes into contact.
- the drive arm 213 is rotated to a position where the tip of the driven arm 214 contacts the upper edge 211g of the cover 211.
- an actuator for example, a stepping motor 215
- a rotor magnetized with two poles
- a stator on which a coil is wound.
- the mechanical shutter 157 has the drive arm 213 that has the lower edge of the cover 211 by the driving force of the stepping motor 215 and the biasing force of the biasing spring 218 a described above. It is pressed against the portion 211f (open side stopper).
- the stepping motor 215 rotates in the same direction as the biasing direction of the biasing spring 218a by exciting the A-phase coil to the S pole and the B-phase coil to the S pole. Generate power.
- the drive arm 213 can be more reliably pressed against the stopper, so that the operation when closing the mechanical shutter 157 can be performed with higher accuracy.
- the mechanical shutter 157 has the driving arm 213 that has the upper edge of the cover 211 by the driving force of the stepping motor 215 and the biasing force of the biasing spring 218a. It is pressed against 211 g (closed side stopper).
- the stepping motor 215 rotates in the same direction as the biasing direction of the biasing spring 218a by exciting the A-phase coil to the N pole and the B-phase coil to the S pole. Generate power.
- the driven arm 214 can be more reliably pressed against the stopper, so that the closed state of the first blade 212a and the second blade 212b can be reliably maintained.
- the mechanical shutter 157 can be operated by inputting an excitation control signal.
- the stepping motor 215 presses the drive arm 213 against the stopper by exciting the A-phase coil to the S pole and the B-phase coil to the S pole, so that the first blade 212a and the second blade 212b is held open.
- the stepping motor 215 excites the A-phase coil from the S-pole state in the order of S-pole and N-pole, and the B-phase coil from the S-pole state in the order of N-pole and N-pole.
- the first blade 212a and the second blade 212b are scanned in the closing direction.
- the stepping motor 215 presses the driven arm 214 against the stopper by exciting the A-phase coil to the N pole and the B-phase coil to the S pole, and thereby the first blade 212a and the second blade 212b. Is kept closed.
- the mechanical shutter 157 can also be operated by inputting an excitation control signal as shown in ⁇ TYPE 2> in FIG. Specifically, the stepping motor 215 presses the drive arm 213 against the stopper by exciting the A-phase coil to the S pole and the B-phase coil to the S pole, so that the first blade 212a and the second blade 212b is held open. Next, the stepping motor 215 excites the A-phase coil from the S-pole state to the N-pole, and the B-phase coil from the S-pole state to the N-pole, whereby the first blade 212a and the first The two blades 212b are scanned in the closing direction. Finally, the stepping motor 215 presses the driven arm 214 against the stopper by exciting the A-phase coil to the N pole and the B-phase coil to the S pole, and thereby the first blade 212a and the second blade 212b. Is kept closed.
- the camera controller 153 performs standby control when the power of the camera body 102 is turned on by the user.
- the camera controller 153 displays the image data obtained by the CMOS image sensor 150 on the liquid crystal monitor 163 as a through image in standby control.
- the camera controller 153 performs standby control. Details of the standby control will be described later.
- the camera controller 153 performs exposure control when the release button 160 is fully pressed (turned on) by the user.
- the camera controller 153 realizes an electronic front curtain by controlling the CMOS image sensor 150 and the mechanical shutter 157 in exposure control.
- the camera controller 153 reads out image data (still image) while the aperture 211c is shielded by the first blade 212a and the second blade 212b of the mechanical shutter 157.
- the camera controller 153 moves the first blade 212a and the second blade 212b to the open position. Details of the exposure control will be described later.
- the camera controller 153 When the photographing is completed, the camera controller 153 returns to standby control.
- the camera controller 153 stops the power supply to each part of the camera body 102.
- Exposure control First, exposure control by the camera controller 153 will be described.
- the camera controller 153 controls the CMOS image sensor 150 and executes an electronic shutter as a front curtain. Thereafter, the camera controller 153 controls the mechanical shutter 157 to function as a rear curtain. Thereby, the imaging operation is executed.
- the camera controller 153 performs the following adjustment in order to make the locus of the electronic shutter as the front curtain more approximate to the locus of the mechanical shutter 157 as the rear curtain.
- the camera controller 153 scans the electronic shutter in consideration of the temperature of the device itself (any of the digital camera 100, the mechanical shutter 157, and the stepping motor 215). The pattern is adjusted and the electronic shutter is controlled for the CMOS image sensor 150 (T1).
- the camera controller 153 turns on the excitation of the stepping motor 215 and presses the drive arm 213 against the stopper (the lower end edge 211f of the cover 211) (T2). This is to make the drive control of the mechanical shutter 157 more accurate.
- the camera controller 153 waits for the shutter speed time after the electronic shutter is started (T3), and moves the first blade 212a and the second blade 212b of the mechanical shutter 157 in the closing direction (T4).
- the camera controller 153 turns on the excitation of the stepping motor 215 and presses the driven arm 214 against the stopper (the upper edge 211g of the cover 211) (T5). This is to make the shielding of the mechanical shutter 157 more reliable.
- the camera controller 153 reads out still image data from the CMOS image sensor 150 (T6).
- the camera controller 153 moves the first blade 212a and the second blade 212b in the opening direction (T7).
- standby control will be described with reference to FIG.
- the exposure control when the temperature of the stepping motor 215 rises, it is necessary to adjust the scanning pattern of the electronic shutter. Therefore, in standby control, control is performed to turn off the excitation of the stepping motor 215 as much as possible.
- the mechanical shutter 157 moves from the position where the first blade 212a and the second blade 212b should be positioned in the standby state when an impact is applied to the camera body 102. There is a fear.
- the first blade 212a and the second blade 212b are biased to either the open position or the closed position by the snap action mechanism 218. Therefore, as long as the impact is small, the biasing force of the biasing spring 218a holds the first blade 212a and the second blade 212b in the open position and the closed position that should be positioned in the standby state.
- the snap action mechanism 218 can hold the first blade 212a and the second blade 212b, as described above, the direction of the urging force is switched with the reference position as a boundary.
- the impact is great, the first blade 212a and the second blade 212b move against the biasing force of the biasing spring 218a, and the first blade 212a and the second blade 212b move in the direction of the biasing force of the biasing spring 218a.
- the biasing force of the biasing spring 218a is opposite to the position corresponding to the standby state among the open position and the closed position. It will be moved to the position.
- the urging force of the urging spring 218a toward the open position is weaker than the urging force toward the closed position. Therefore, when the shock is applied from the open position to the closed position rather than from the closed position to the open position.
- the first blade 212a and the second blade 212b are easy to move. In this example, since the positions of the first blade 212a and the second blade 212b in the standby state are set to the open position, compared to the case where the first blade 212a and the second blade 212b are positioned to the closed position, When an impact is applied, the first blade 212a and the second blade 212b are easily moved to opposite positions.
- the camera controller 153 performs standby control as follows.
- the camera controller 153 turns off the excitation for the stepping motor 215 when it enters standby control (S1). Thereby, power consumption is reduced and the temperature rise of the stepping motor 215 is suppressed. This is the normal standby state.
- the camera controller 153 determines whether or not the output of the acceleration sensor 158 is equal to or greater than a predetermined value (S2).
- a predetermined value S2
- the camera controller 153 continues turning off the excitation for the stepping motor 215. That is, the camera controller 153 monitors whether or not the acceleration acting on the camera body 102 is equal to or higher than the predetermined acceleration, and continues the inoperative state of the stepping mode 215 as long as the acceleration is less than the predetermined acceleration.
- the camera controller 153 turns on the excitation for the stepping motor 215 (S3). Specifically, the camera controller 153 holds the first blade 212a and the second blade 212b in the open position, i.e., presses the driving arm 213 against the stopper (the lower end edge 211f of the cover 211). Supply current.
- the camera controller 153 waits for a predetermined time with the excitation for the stepping motor 215 turned on (S4).
- the camera controller 153 returns to step S1, turns off the excitation for the stepping motor 215, and returns to the normal standby state.
- the digital camera 100 includes the cover 211 having the aperture 211c, the curtain unit 212 that is held by the cover 211 and moves between the closed position that shields the aperture 211c and the open position that opens the aperture 211c, and the curtain.
- a stepping motor 215 that drives the unit 212
- a camera controller 153 that controls the stepping motor 215, and an acceleration sensor 158 that detects the acceleration of the camera body 102 are provided and the stepping motor 215 is off.
- the curtain unit 212 is located at the closed position or the open position, and the camera controller 153 turns on the stepping motor 215 when the acceleration sensor 158 detects an acceleration of a predetermined value or more in the standby state, and the curtain unit 212 is turned on. On standby Held in the closed position or the open position to respond.
- the digital camera 100 further includes a biasing spring 218a that biases the curtain unit 212 toward the closed position and the open position.
- the curtain unit 212 receives the biasing force of the biasing spring 218a in the standby state. In the state, it is located at the closed position or the open position corresponding to the standby state.
- the curtain unit 212 is basically held in either the closed position or the open position by the biasing spring 218a.
- the urging spring 218a urges the curtain unit 212 to the open position in the predetermined first area S1 including the open position in the movement range between the closed position and the open position of the curtain unit 212, while moving. In the predetermined second region S2 in the range including the closed position, the curtain unit is biased to the closed position.
- the biasing spring 218a is configured to switch the biasing direction within the movement range between the closed position and the open position of the curtain unit 212.
- the urging in the closing direction and the urging in the opening direction of the curtain unit 212 can be realized by one urging spring 218a.
- the curtain unit 212 should be originally positioned when the urging direction of the urging spring 218a is switched by the impact force. It easily moves to a position opposite to the position. Therefore, the above-described standby control is particularly effective.
- the biasing spring 218a switches the direction in which the curtain unit 212 is biased with respect to the third region S3 between the first region S1 and the second region S2 in the movement range.
- the driving arm 213 is pressed against the stopper by the biasing force of the biasing spring 218a, and the driving arm 213 is further pressed against the stopper by the excitation of the stepping motor 215. .
- the drive arm 213 can be reliably pressed by the stopper. Therefore, since the positioning of the curtain unit 212 in the open state can be performed accurately, the operation for moving the curtain unit 212 to the closed position can be performed with higher accuracy.
- the driven arm 214 is pressed against the stopper by the biasing force of the biasing spring 218a in the closed state of the curtain unit 212, and the driven arm 214 is further pressed against the stopper by excitation of the stepping motor 215. .
- the shielding state of the aperture 211c by the curtain unit 212 can be more reliably maintained.
- a cover having an opening and having a closing stopper and an opening stopper which are mechanical ends;
- a curtain mechanism that is held by the cover so as to move between a position that contacts the closing stopper and shields the opening, and a position that contacts the opening stopper and does not shield (open) the opening;
- the curtain mechanism is based on a predetermined boundary between the shielding position and the non-shielding position, When present on the shielding position side, it is urged by the first urging force to the shielding position, When present on the non-shielding position side, the second biasing force is applied to the shielding position,
- the actuator is In a state where the curtain mechanism is in contact with the closing stopper by the first urging force, power is generated to further press the curtain mechanism against the closing stopper,
- An imaging apparatus that generates power for further pressing the curtain mechanism against the opening stopper in a state where the curtain mechanism is in contact with the opening stopper by a second
- the configuration of the digital camera 100 is merely an example, and is not limited to the above configuration.
- the digital camera 100 includes the camera body 102 and the interchangeable lens 101 that can be attached to the camera body 102, but the camera body 102 and the lens 101 may not be removable.
- the acceleration sensor 158 may be used instead of the acceleration sensor 158.
- the camera controller 153 may turn on the excitation of the stepping motor 215 when detecting an impact (impact force) of a predetermined value or more in the standby control.
- the acceleration sensor 158 may be a sensor that can detect the movement of the camera body 102 per unit time.
- the acceleration sensor 158 does not limit the direction of detected acceleration, you may limit the direction of acceleration.
- the acceleration sensor 158 is configured to detect a direction corresponding to the moving direction of the curtain unit 212, that is, a vertical direction acceleration, and the camera controller 153 performs the standby control based on the vertical direction acceleration. It may be.
- the acceleration sensor 158 may detect an acceleration of three orthogonal axes. In that case, the camera controller 153 may perform standby control based on the acceleration in the direction close to the moving direction of the curtain unit 212 among the accelerations in the three directions, or the acceleration in the moving direction of the curtain unit 212 from the acceleration in the three directions. The standby control may be performed based on the calculated acceleration.
- the mechanical shutter 157 is not provided with a lock mechanism for the curtain unit 212.
- the mechanical shutter 157 may employ a mechanical lock mechanism (hereinafter referred to as a mechanical lock) that restricts the movement of the curtain unit 212 in the open position and / or the closed position.
- a mechanical lock a mechanical lock mechanism that restricts the movement of the curtain unit 212 in the open position and / or the closed position.
- the camera controller 153 controls the mechanical shutter 157.
- the camera controller 153 turns on (locks) the mechanical lock of the curtain unit 212 (S11), and then turns off the power of the camera body 102 (S12).
- the camera controller 153 turns off the power of the camera body 102 (S13) and then turns off (unlocks) the mechanical lock of the curtain unit 212 ( S14). In this way, it is possible to prevent the curtain unit 212 of the mechanical shutter 157 from moving erroneously while the camera body 102 is powered off (for example, from the open state to the closed state).
- the camera controller 153 may hold the state in which the mechanical lock is turned on until the release is turned on. Specifically, the camera controller 153 turns off the mechanical lock (S22) when the release is turned on while the mechanical lock is on (S21). Then, the camera controller 153 performs an imaging operation using the curtain unit 212 of the mechanical shutter 157. Thereafter, the camera controller 153 moves the curtain unit 212 of the mechanical shutter 157 to the open position (S23), and turns on the mechanical lock when the curtain unit 212 moves to the closed position (S24). In this way, it is possible to prevent the curtain unit 212 of the mechanical shutter 157 from moving erroneously (for example, from the open state to the closed state) while the camera body 102 is powered off and during the release standby. be able to.
- the position of the curtain unit 212 in the standby state is set to the open position, but the position of the curtain unit 212 in the standby state may be set to the closed position.
- the lower end edge 211f and the upper end edge 211g of the cover 211 form a stopper, but the configuration of the stopper is not limited to this.
- the curtain unit 212 is in an open state or a closed state, the curtain unit 212 is physically brought into contact with any one of the first blade 212a, the second blade 212b, the drive arm 213, and the driven arm 214 to restrict the movement of the curtain unit 212. If there is, a stopper having an arbitrary configuration can be adopted.
- the camera controller 153 operates the stepping motor 215 so as to press the drive arm 213 against the stopper when an acceleration equal to or higher than a predetermined acceleration is detected in the standby control, but the stepping motor 215 in the standby control.
- This control is not limited to this.
- the camera controller 153 supplies current to the stepping motor 215 so that the first blade 212a and the second blade 212b are positioned at the open position when acceleration equal to or higher than a predetermined acceleration is detected. May be. That is, in the above description, in order to press the drive arm 213 against the stopper, the stepping motor 215 supplies a current that causes the first blade 212a and the second blade 212b to move further in the opening direction than the open position.
- the camera controller 153 opens the first blade 212a and the second blade 212b.
- a current sufficient to be positioned may be supplied to the stepping motor 215.
- the drive arm 213 contacts the stopper when the first blade 212a and the second blade 212b are held in the open position.
- the snap action mechanism 218 uses one biasing spring 218a to realize the biasing in the opening direction and the biasing in the closing direction of the first blade 212a and the second blade 212b, but is limited to this configuration. It is not a thing.
- the snap action mechanism 218 includes two springs: a spring that biases the first blade 212a and the second blade 212b in the opening direction and a spring that biases the first blade 212a and the second blade 212b in the closing direction. You may have.
- the actuator is not limited to the stepping motor 215.
- the actuator may be another motor such as a DC motor.
- the stepping motor 215 can hold the drive arm 213 in a desired position, the stepping motor 215 is preferable when the curtain unit 212 is held as a single actuator (that is, not in cooperation with the stopper).
- the present disclosure can be applied to an imaging apparatus including a mechanical shutter such as a digital camera, a movie, or a mirrorless.
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Abstract
In a standby state in which a stepping motor (215) is turned off, a curtain unit (212) is positioned in an open position at which an aperture (211c) is opened. When an acceleration sensor (158) detects an acceleration equal to or greater than a prescribed value in the standby state, a camera controller (153) turns the stepping motor (215) on and holds the curtain unit (212) at the open position.
Description
本開示は、メカシャッタを備える撮像装置に関する。
The present disclosure relates to an imaging apparatus including a mechanical shutter.
特許文献1は、メカシャッタと電子シャッタを併用して露光を実現する撮像装置を開示している。
Patent Document 1 discloses an imaging apparatus that realizes exposure by using both a mechanical shutter and an electronic shutter.
本開示は、アクチュエータの温度の上昇を抑えつつ、幕機構の誤動作を軽減できる撮像装置を提供する。
This disclosure provides an imaging apparatus that can reduce malfunction of the curtain mechanism while suppressing an increase in the temperature of the actuator.
本開示における撮像装置は、開口部を有するカバーと、前記カバーに保持され、前記開口部を遮蔽する閉位置と前記開口部を開く開位置との間を移動する幕機構と、前記幕機構を駆動するアクチュエータと、前記アクチュエータを制御する制御部と、自装置の加速度を検知するセンサとを備え、前記幕機構は、前記アクチュエータがオフとなっている待機状態においては、前記閉位置又は前記開位置に位置しており、前記制御部は、前記待機状態において前記センサが所定値以上の加速度を検知したときに、前記アクチュエータをオンにして、前記幕機構を該待機状態に対応する前記閉位置又は前記開位置に保持する。
An imaging apparatus according to the present disclosure includes a cover having an opening, a curtain mechanism that is held by the cover and moves between a closed position that shields the opening and an open position that opens the opening, and the curtain mechanism. An actuator for driving, a control unit for controlling the actuator, and a sensor for detecting the acceleration of the own device, and the curtain mechanism is in the closed position or opened in the standby state in which the actuator is off. The control unit turns on the actuator when the sensor detects acceleration equal to or greater than a predetermined value in the standby state, and the control unit moves the curtain mechanism to the closed position corresponding to the standby state. Or hold in the open position.
本開示における撮像装置は、アクチュエータの温度の上昇を抑えつつ、幕機構の誤動作を軽減できる。
The imaging device according to the present disclosure can reduce malfunction of the curtain mechanism while suppressing an increase in the temperature of the actuator.
以下、適宜図面を参照しながら、実施の形態を詳細に説明する。但し、必要以上に詳細な説明は省略する場合がある。例えば、既によく知られた事項の詳細説明や実質的に同一の構成に対する重複説明を省略する場合がある。これは、以下の説明が不必要に冗長になるのを避け、当業者の理解を容易にするためである。
Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.
なお、発明者(ら)は、当業者が本開示を十分に理解するために添付図面および以下の説明を提供するのであって、これらによって特許請求の範囲に記載の主題を限定することを意図するものではない。
The inventor (s) provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is intended to limit the subject matter described in the claims. Not what you want.
<1.構成>
<1-1.構成概要>
例示的な実施形態にかかるデジタルカメラ100の構成の概要について説明する。 <1. Configuration>
<1-1. Outline of configuration>
An outline of the configuration of thedigital camera 100 according to the exemplary embodiment will be described.
<1-1.構成概要>
例示的な実施形態にかかるデジタルカメラ100の構成の概要について説明する。 <1. Configuration>
<1-1. Outline of configuration>
An outline of the configuration of the
図1は、デジタルカメラ100の外観図である。図1に示すように、デジタルカメラ100は、交換レンズ101と、交換レンズ101を装着可能なカメラボディ102とを備えている。カメラボディ102は、レリーズ釦160を備えている。カメラボディ102は、レリーズ釦160のユーザによる半押し操作を受け付けると、交換レンズ101に対して、オートフォーカス動作するよう制御信号を送信する。また、カメラボディ102は、レリーズ釦160のユーザによる操作を受け付けると、交換レンズ101を介して形成される被写体像の撮影動作を実行する。デジタルカメラ100は、撮像装置の一例である。
FIG. 1 is an external view of the digital camera 100. As shown in FIG. 1, the digital camera 100 includes an interchangeable lens 101 and a camera body 102 to which the interchangeable lens 101 can be attached. The camera body 102 includes a release button 160. When the camera body 102 receives a half-press operation by the user of the release button 160, the camera body 102 transmits a control signal to the interchangeable lens 101 so as to perform an autofocus operation. Further, when the camera body 102 receives an operation by the user of the release button 160, the camera body 102 performs a photographing operation of a subject image formed via the interchangeable lens 101. The digital camera 100 is an example of an imaging device.
図2は、デジタルカメラ100(カメラボディ102)の背面図である。カメラボディ102は、背面部に液晶モニタ163、タッチパネル162、中央釦204および十字釦205を含むカメラ側操作部170等を備えている。カメラボディ102は、タッチパネル162や、カメラ側操作部170のユーザによる操作を受け付けて、操作内容に従った各種制御を行う。
FIG. 2 is a rear view of the digital camera 100 (camera body 102). The camera body 102 includes a liquid crystal monitor 163, a touch panel 162, a camera side operation unit 170 including a center button 204 and a cross button 205 on the back surface. The camera body 102 receives operations by the user of the touch panel 162 and the camera side operation unit 170, and performs various controls according to the operation contents.
図3は、デジタルカメラ100(交換レンズ101およびカメラボディ102)の構成を示すブロック図である。交換レンズ101は、レンズコントローラ120、レンズマウント130、フォーカスレンズ110およびズームレンズ112を含む光学系、フォーカスレンズ駆動部111、フォーカスリング114、ズームレンズ駆動部113、ズームリング115、絞り116、絞り駆動部117、DRAM121、並びに、フラッシュメモリ122等を備えている。カメラボディ102は、カメラコントローラ153、ボディマウント140、CMOSイメージセンサ150、タイミングジェネレータ151、アナログフロントエンド152、液晶モニタ163、タッチパネル162、レリーズ釦160、カメラ側操作部170、電源154、DRAM155、フラッシュメモリ156、メカシャッタ157、加速度センサ158、カードスロット165、及び、メモリカード164等を備えている。
FIG. 3 is a block diagram showing the configuration of the digital camera 100 (interchangeable lens 101 and camera body 102). The interchangeable lens 101 includes an optical system including a lens controller 120, a lens mount 130, a focus lens 110, and a zoom lens 112, a focus lens driving unit 111, a focus ring 114, a zoom lens driving unit 113, a zoom ring 115, an aperture 116, and an aperture drive. Unit 117, DRAM 121, flash memory 122, and the like. The camera body 102 includes a camera controller 153, a body mount 140, a CMOS image sensor 150, a timing generator 151, an analog front end 152, a liquid crystal monitor 163, a touch panel 162, a release button 160, a camera side operation unit 170, a power supply 154, a DRAM 155, and a flash. A memory 156, a mechanical shutter 157, an acceleration sensor 158, a card slot 165, a memory card 164, and the like are provided.
<1-2.交換レンズ各部の構成>
交換レンズ101各部の構成について説明する。 <1-2. Configuration of each part of interchangeable lens>
The configuration of each part of theinterchangeable lens 101 will be described.
交換レンズ101各部の構成について説明する。 <1-2. Configuration of each part of interchangeable lens>
The configuration of each part of the
レンズ系は、フォーカスレンズ110とズームレンズ112とを含んでおり、被写体からの光を集光する。
The lens system includes a focus lens 110 and a zoom lens 112, and collects light from the subject.
ズームレンズ112は、ズームレンズ駆動部113により駆動される。ズームレンズ駆動部113は、ズームリング115の操作に応じて、ズームレンズ112を駆動する。
The zoom lens 112 is driven by a zoom lens driving unit 113. The zoom lens driving unit 113 drives the zoom lens 112 according to the operation of the zoom ring 115.
フォーカスレンズ110は、フォーカスレンズ駆動部111により駆動される。フォーカスレンズ駆動部111は、フォーカスリング114の操作又はカメラコントローラ153からの制御信号に応じて、フォーカスレンズ110を駆動する。
The focus lens 110 is driven by a focus lens driving unit 111. The focus lens driving unit 111 drives the focus lens 110 in response to an operation of the focus ring 114 or a control signal from the camera controller 153.
絞り116は、レンズ系を通過してCMOSイメージセンサ150に入射する光の量を調整する。絞り116は、絞り駆動部117により駆動される。絞り駆動部117は、カメラコントローラ153からの制御信号に応じて、絞り116を駆動する。
The diaphragm 116 adjusts the amount of light that passes through the lens system and enters the CMOS image sensor 150. The diaphragm 116 is driven by the diaphragm driver 117. The aperture driving unit 117 drives the aperture 116 in accordance with a control signal from the camera controller 153.
レンズコントローラ120は、交換レンズ101全体を制御するものである。レンズコントローラ120は、マイクロコンピュータ等のプロセッサで実現してもよく、ハードワイヤードな回路で実現してもよい。なお、レンズコントローラ120は、交換レンズ101がカメラボディ102に装着されると、フラッシュメモリ122に記憶されたレンズデータを読み出して、カメラコントローラ153に送信する。
The lens controller 120 controls the entire interchangeable lens 101. The lens controller 120 may be realized by a processor such as a microcomputer or a hard-wired circuit. When the interchangeable lens 101 is attached to the camera body 102, the lens controller 120 reads out lens data stored in the flash memory 122 and transmits it to the camera controller 153.
<1-3.カメラボディ各部の構成>
続いて、カメラボディ102各部の構成について説明する。 <1-3. Configuration of camera body parts>
Next, the configuration of each part of thecamera body 102 will be described.
続いて、カメラボディ102各部の構成について説明する。 <1-3. Configuration of camera body parts>
Next, the configuration of each part of the
カメラコントローラ153は、レリーズ釦160やカメラ側操作部170からの指示に応じて、CMOSイメージセンサ150等のデジタルカメラ100全体を制御する。カメラコントローラ153は、垂直同期信号をタイミングジェネレータ151に送信する。これと並行して、カメラコントローラ153は、垂直同期信号に基づいて露光同期信号を生成する。カメラコントローラ153は、生成した露光同期信号を、ボディマウント140及びレンズマウント130を介して、レンズコントローラ120に周期的に繰り返し送信する。カメラコントローラ153は、DRAM155及びフラッシュメモリ156に接続されており、必要に応じて情報を書き込んだり、読み出したりすることができる。カメラコントローラ153は、ハードワイヤードな電子回路で構成してもよいし、プログラムを用いたマイクロコンピュータ等のプロセッサで構成してもよい。カメラコントローラ153は、制御部の一例である。
The camera controller 153 controls the entire digital camera 100 such as the CMOS image sensor 150 in accordance with an instruction from the release button 160 or the camera side operation unit 170. The camera controller 153 transmits a vertical synchronization signal to the timing generator 151. In parallel with this, the camera controller 153 generates an exposure synchronization signal based on the vertical synchronization signal. The camera controller 153 periodically and repeatedly transmits the generated exposure synchronization signal to the lens controller 120 via the body mount 140 and the lens mount 130. The camera controller 153 is connected to the DRAM 155 and the flash memory 156, and can write and read information as necessary. The camera controller 153 may be configured with a hard-wired electronic circuit or a processor such as a microcomputer using a program. The camera controller 153 is an example of a control unit.
DRAM155は、カメラコントローラ153による各種制御の際のワークメモリとして使用される。また、フラッシュメモリ156は、カメラコントローラ153による各種制御の際に使用するプログラムやパラメータ等を格納している。
The DRAM 155 is used as a work memory for various controls by the camera controller 153. The flash memory 156 stores programs, parameters, and the like used for various controls by the camera controller 153.
CMOSイメージセンサ150は、交換レンズ101を介して入射される被写体像を撮像して画像情報を生成する。生成された画像情報は、AFE152でアナログ形式のデータからデジタル形式のデータに変換される。AFE152でデジタル化された画像情報は、カメラコントローラ153で各種の画像処理が施される。ここで言う各種の画像処理とは、例えば、ガンマ補正処理、ホワイトバランス補正処理、キズ補正処理、YC変換処理、電子ズーム処理、JPEG圧縮処理等であるが、これらに限定されるものではない。また、CMOSイメージセンサ150に代えて、例えばNMOSイメージセンサやCCDイメージセンサなど、他の撮像素子を用いてもよい。
The CMOS image sensor 150 captures a subject image incident through the interchangeable lens 101 and generates image information. The generated image information is converted from analog format data to digital format data by the AFE 152. The image information digitized by the AFE 152 is subjected to various image processing by the camera controller 153. Examples of the various types of image processing include gamma correction processing, white balance correction processing, scratch correction processing, YC conversion processing, electronic zoom processing, and JPEG compression processing, but are not limited thereto. Further, instead of the CMOS image sensor 150, for example, another imaging element such as an NMOS image sensor or a CCD image sensor may be used.
CMOSイメージセンサ150は、タイミングジェネレータ151で制御されるタイミングで動作する。タイミングジェネレータ151で制御されるCMOSイメージセンサ150の動作は、静止画像の撮像動作、スルー画像の撮像動作、データ転送動作、電子シャッタ動作、電子先幕動作等がある。スルー画像は主に動画像であり、静止画像の撮像のための構図を決めるために液晶モニタ163に表示されるものである。
The CMOS image sensor 150 operates at a timing controlled by the timing generator 151. The operation of the CMOS image sensor 150 controlled by the timing generator 151 includes a still image capturing operation, a through image capturing operation, a data transfer operation, an electronic shutter operation, and an electronic front curtain operation. The through image is mainly a moving image and is displayed on the liquid crystal monitor 163 in order to determine a composition for capturing a still image.
メカシャッタ157は、レンズ系を介して入射された、CMOSイメージセンサ150に対する光の遮断又は通過を切り替える。すなわち、メカシャッタ157は、CMOSイメージセンサ150に当たる光の量を時間的に調整する。メカシャッタ157は、カメラコントローラ153によって制御される。メカシャッタ157は、シャッタ機構の一例である。メカシャッタ157の詳細な構成は、後述する。
The mechanical shutter 157 switches between blocking and passing light entering the CMOS image sensor 150 through the lens system. That is, the mechanical shutter 157 adjusts the amount of light hitting the CMOS image sensor 150 in terms of time. The mechanical shutter 157 is controlled by the camera controller 153. The mechanical shutter 157 is an example of a shutter mechanism. The detailed configuration of the mechanical shutter 157 will be described later.
加速度センサ158は、カメラボディ102の加速度を検出するセンサである。加速度センサ158は、検出した加速度をカメラコントローラ153に出力する。加速度センサ158は、3軸の加速度センサであってもよい。加速度センサ158は、センサの一例である。
The acceleration sensor 158 is a sensor that detects the acceleration of the camera body 102. The acceleration sensor 158 outputs the detected acceleration to the camera controller 153. The acceleration sensor 158 may be a triaxial acceleration sensor. The acceleration sensor 158 is an example of a sensor.
ボディマウント140は、交換レンズ101に有するレンズマウント130と相俟って、交換レンズ101とカメラボディ102とを機械的及び電気的に接続する接続部材である。交換レンズ101とカメラボディ102とが機械的および電気的に接続されると、レンズコントローラ120とカメラコントローラ153とは、通信可能な状態となる。ボディマウント140は、カメラコントローラ153から受信した露光同期信号やその他制御信号を、レンズマウント130を介してレンズコントローラ120へ送信する。また、ボディマウント140は、レンズマウント130を介してレンズコントローラ120から受信した信号をカメラコントローラ153へ送信する。
The body mount 140 is a connecting member that mechanically and electrically connects the interchangeable lens 101 and the camera body 102 together with the lens mount 130 included in the interchangeable lens 101. When the interchangeable lens 101 and the camera body 102 are mechanically and electrically connected, the lens controller 120 and the camera controller 153 are in a communicable state. The body mount 140 transmits the exposure synchronization signal and other control signals received from the camera controller 153 to the lens controller 120 via the lens mount 130. The body mount 140 transmits a signal received from the lens controller 120 via the lens mount 130 to the camera controller 153.
レリーズ釦160は、使用者の操作を受け付ける。レリーズ釦160は、半押しと全押しの二段階に操作される。使用者がレリーズ釦160を半押し操作すると、カメラコントローラ153は、オートフォーカス動作を実行する。使用者がレリーズ釦160を全押し操作すると、カメラコントローラ153は、全押し操作に応じて撮影を行い、生成された画像情報をメモリカード164に記憶する。
Release button 160 accepts user operations. The release button 160 is operated in two stages, half-press and full-press. When the user presses release button 160 halfway, camera controller 153 performs an autofocus operation. When the user fully presses the release button 160, the camera controller 153 performs shooting according to the full press operation, and stores the generated image information in the memory card 164.
カメラ側操作部170は、上述した中央釦204や十字釦205を含む操作部材の総称である。また、カメラ側操作部170は、MF(Manual Focus)/AF(Autofocus)を切り替えるスイッチを含む。カメラ側操作部170がユーザによる操作を受け付けると、カメラコントローラ153は、操作指示内容に応じた各種制御を実行する。
The camera side operation unit 170 is a general term for operation members including the above-described center button 204 and cross button 205. The camera-side operation unit 170 includes a switch for switching between MF (Manual Focus) / AF (Autofocus). When the camera side operation unit 170 receives an operation by the user, the camera controller 153 executes various controls according to the operation instruction content.
<1-4.メカシャッタ157の構成>
図4は、閉状態のメカシャッタ157の正面図である。図5は、図4のA-A線におけるメカシャッタ157の断面図である。図6は、開状態のメカシャッタ157の正面図である。 <1-4. Configuration ofMechanical Shutter 157>
FIG. 4 is a front view of themechanical shutter 157 in the closed state. FIG. 5 is a cross-sectional view of the mechanical shutter 157 taken along line AA in FIG. FIG. 6 is a front view of the mechanical shutter 157 in the open state.
図4は、閉状態のメカシャッタ157の正面図である。図5は、図4のA-A線におけるメカシャッタ157の断面図である。図6は、開状態のメカシャッタ157の正面図である。 <1-4. Configuration of
FIG. 4 is a front view of the
メカシャッタ157は、単一の幕ユニットでアパーチャの開動作及び閉動作を択一的に行う。例えば、メカシャッタ157がシャッタ動作を行うときには先幕及び後幕の何れかとして択一的に機能する。すなわち、メカシャッタ157は、先幕及び後幕の両方を有するフォーカルプレーンシャッタのようなスリットを形成することなくアパーチャ211cを開閉する。メカシャッタ157は、カバー211と、幕ユニット212と、駆動アーム213と、従動アーム214と、ステッピングモータ215と、閉検出スイッチ216と、開検出スイッチ217と、スナップアクション機構218とを有している。幕ユニット212は、第1羽根212aと第2羽根212bとを有している。幕ユニット212は、幕機構の一例である。
¡Mechanical shutter 157 alternatively performs aperture opening and closing operations with a single curtain unit. For example, when the mechanical shutter 157 performs a shutter operation, it selectively functions as either the front curtain or the rear curtain. That is, the mechanical shutter 157 opens and closes the aperture 211c without forming a slit like a focal plane shutter having both a front curtain and a rear curtain. The mechanical shutter 157 includes a cover 211, a curtain unit 212, a drive arm 213, a driven arm 214, a stepping motor 215, a close detection switch 216, an open detection switch 217, and a snap action mechanism 218. . The curtain unit 212 includes a first blade 212a and a second blade 212b. The curtain unit 212 is an example of a curtain mechanism.
カバー211は、前側カバー211aと後側カバー211bとを有し、全体的にプレート状の形状をしている。カバー211は、第1羽根212a、第2羽根212b、駆動アーム213、従動アーム214、閉検出スイッチ216及び開検出スイッチ217を収容している。カバー211には、長方形のアパーチャ211cが形成されている。具体的には、前側カバー211a及び後側カバー211bの両方にアパーチャ211cが形成されている。アパーチャ211cは、交換レンズ101を通過してCMOSイメージセンサ150に入射する光を遮らない程度の大きさを有している。アパーチャ211cは、カバー211の上下方向において、上側の略2/3の領域に形成されている。つまり、カバー211の下側の略1/3の領域にはアパーチャ211cが設けられていない。アパーチャ211cは、開口部の一例である。
The cover 211 has a front cover 211a and a rear cover 211b, and has a plate-like shape as a whole. The cover 211 houses the first blade 212a, the second blade 212b, the drive arm 213, the driven arm 214, the close detection switch 216, and the open detection switch 217. The cover 211 is formed with a rectangular aperture 211c. Specifically, an aperture 211c is formed in both the front cover 211a and the rear cover 211b. The aperture 211 c has a size that does not block light that passes through the interchangeable lens 101 and enters the CMOS image sensor 150. The aperture 211c is formed in an approximately 2/3 region on the upper side in the vertical direction of the cover 211. That is, the aperture 211c is not provided in a substantially 1 / area below the cover 211. The aperture 211c is an example of an opening.
ステッピングモータ215は、駆動アーム213を回転駆動する。ステッピングモータ215は、後側カバー211bのうち、アパーチャ211cの下方であって、アパーチャ211cよりも側方にずれた位置に取り付けられている。ステッピングモータ215は、アクチュエータの一例である。
Stepping motor 215 drives drive arm 213 to rotate. The stepping motor 215 is attached to the rear cover 211b at a position below the aperture 211c and shifted laterally from the aperture 211c. The stepping motor 215 is an example of an actuator.
第1羽根212a及び第2羽根212bは、カバー211のアパーチャ211cを開閉する。第1羽根212a及び第2羽根212bは、略長方形のプレート状の部材である。第1羽根212a及び第2羽根212bは、両者の間に隙間なく上下に並んだ状態において、アパーチャ211cを遮蔽するのに十分な大きさを有している。第1羽根212a及び第2羽根212bは、互いに重ね合わされた状態においては、アパーチャ211cを開放し、カバー211の下側の略1/3の領域に収容される大きさとなる。
The first blade 212a and the second blade 212b open and close the aperture 211c of the cover 211. The first blade 212a and the second blade 212b are substantially rectangular plate-shaped members. The first blade 212a and the second blade 212b are large enough to shield the aperture 211c in a state where they are aligned vertically with no gap between them. In a state where the first blade 212a and the second blade 212b are overlapped with each other, the aperture 211c is opened, and the first blade 212a and the second blade 212b are accommodated in an approximately 1/3 region below the cover 211.
駆動アーム213の一端部は、ステッピングモータ215の回転軸に取り付けられている。つまり、駆動アーム213は、ステッピングモータ215により回転駆動される。駆動アーム213の他端部には、第1羽根212aが回転可能に連結されている。また、駆動アーム213の中間部には、第2羽根212bが回転可能に連結されている。
One end of the drive arm 213 is attached to the rotating shaft of the stepping motor 215. That is, the drive arm 213 is rotationally driven by the stepping motor 215. A first blade 212 a is rotatably connected to the other end of the drive arm 213. The second blade 212b is rotatably connected to the intermediate portion of the drive arm 213.
従動アーム214の一端部は、後側カバー211bのうちアパーチャ211cの側方であって且つステッピングモータ215の上方の部分に回転可能に連結されている。従動アーム214の他端部には、第1羽根212aが回転可能に連結されている。また、従動アーム214の中間部には、第2羽根212bが回転可能に連結されている。従動アーム214は、駆動アーム213よりも上方の位置において、第1羽根212a及び第2羽根212bに連結されている。
One end of the driven arm 214 is rotatably connected to a portion of the rear cover 211b that is on the side of the aperture 211c and above the stepping motor 215. A first blade 212 a is rotatably connected to the other end of the driven arm 214. The second blade 212b is rotatably connected to the intermediate portion of the driven arm 214. The driven arm 214 is connected to the first blade 212a and the second blade 212b at a position above the drive arm 213.
こうして、第1羽根212a、第2羽根212b、駆動アーム213及び従動アーム214は、リンク機構を構成する。駆動アーム213をステッピングモータ215により回転駆動すると、駆動アーム213の回動に連動して、第1羽根212a、第2羽根212b及び従動アーム214が移動する。第1羽根212a及び第2羽根212bは、アパーチャ211cを遮蔽する閉位置と、アパーチャ211cを開放する開位置との間で移動する。閉位置においては、第1羽根212a及び第2羽根212bは、隙間なく上下に並んで、アパーチャ211cを完全に遮蔽する。開位置においては、第1羽根212a及び第2羽根212bは、互いに重なり合ってカバー211に収容され、アパーチャ211cを開放する。開位置は、アパーチャ211cよりも下方に位置するので、第1羽根212a及び第2羽根212bは、アパーチャ211cを下方から上方へ遮蔽していく。尚、駆動アーム213及び従動アーム214の回転方向に関し、第1羽根212a及び第2羽根212bが開位置へ向かう方向を開方向と称し、第1羽根212a及び第2羽根212bが閉位置へ向かう方向を閉方向と称する。また、第1羽根212a及び第2羽根212bが開位置に位置する状態を開状態と称し、第1羽根212a及び第2羽根212bが閉位置に位置する状態を閉状態と称する。
Thus, the first blade 212a, the second blade 212b, the drive arm 213, and the driven arm 214 constitute a link mechanism. When the drive arm 213 is rotationally driven by the stepping motor 215, the first blade 212a, the second blade 212b, and the driven arm 214 move in conjunction with the rotation of the drive arm 213. The first blade 212a and the second blade 212b move between a closed position that shields the aperture 211c and an open position that opens the aperture 211c. In the closed position, the first blades 212a and the second blades 212b are lined up and down without any gap and completely shield the aperture 211c. In the open position, the first blade 212a and the second blade 212b overlap each other and are accommodated in the cover 211 to open the aperture 211c. Since the open position is located below the aperture 211c, the first blade 212a and the second blade 212b shield the aperture 211c from below to above. Regarding the rotational directions of the drive arm 213 and the driven arm 214, the direction in which the first blade 212a and the second blade 212b go to the open position is referred to as the open direction, and the direction in which the first blade 212a and the second blade 212b go to the closed position. Is referred to as the closing direction. The state where the first blade 212a and the second blade 212b are located at the open position is referred to as an open state, and the state where the first blade 212a and the second blade 212b are located at the closed position is referred to as a closed state.
閉検出スイッチ216は、第1羽根212a及び第2羽根212bが閉位置に位置すること(閉状態)を検出する。具体的には、従動アーム214には、突起部214cが設けられている。そして、第1羽根212a及び第2羽根212bが閉位置に位置するときの突起部214cを検出できる位置に閉検出スイッチ216が設けられている。
The close detection switch 216 detects that the first blade 212a and the second blade 212b are in the closed position (closed state). Specifically, the driven arm 214 is provided with a protrusion 214c. And the close detection switch 216 is provided in the position which can detect the protrusion part 214c when the 1st blade | wing 212a and the 2nd blade | wing 212b are located in a closed position.
開検出スイッチ217は、第1羽根212a及び第2羽根212bが開位置に位置すること(開状態)を検出する。具体的には、駆動アーム213には、突起部213aが設けられている。そして、第1羽根212a及び第2羽根212bが開位置に位置するときの突起部213aを検出できる位置に開検出スイッチ217が設けられている。
The open detection switch 217 detects that the first blade 212a and the second blade 212b are in the open position (open state). Specifically, the drive arm 213 is provided with a protrusion 213a. An open detection switch 217 is provided at a position where the protrusion 213a can be detected when the first blade 212a and the second blade 212b are in the open position.
例えば、閉検出スイッチ216及び開検出スイッチ217は、光センサ(フォトインタラプタ又はフォトリフレクタ)であり、光が遮断又は反射されることによって閉状態又は開状態を検出する。
For example, the close detection switch 216 and the open detection switch 217 are optical sensors (a photo interrupter or a photo reflector), and detect a closed state or an open state by blocking or reflecting light.
このように、第1羽根212a及び第2羽根212bをリンク機構及びステッピングモータ215により駆動することによって、メカシャッタ157を小型化すると共に簡略化することができる。尚、前記ステッピングモータ215をメータ、プランジャ若しくはDCモータ等の電磁アクチュエータ又は超音波アクチュエータなどに置き換えてもよい。
Thus, by driving the first blade 212a and the second blade 212b by the link mechanism and the stepping motor 215, the mechanical shutter 157 can be reduced in size and simplified. The stepping motor 215 may be replaced with an electromagnetic actuator such as a meter, a plunger or a DC motor, or an ultrasonic actuator.
スナップアクション機構218は、第1羽根212a及び第2羽根212bが開位置に位置するときには該第1羽根212a及び第2羽根212bを開位置に維持するように従動アーム214を付勢する一方、第1羽根212a及び第2羽根212bが閉位置に位置するときには該第1羽根212a及び第2羽根212bを閉位置に維持するように従動アーム214を付勢する。スナップアクション機構218は、後側カバー211bに設けられた第1係合部211dと、従動アーム214に設けられた第2係合部214bと、第1係合部211d及び第2係合部214bに連結された付勢バネ218aとを有している。後側カバー211bには、従動アーム214が回転するときに第2係合部214bが通過する円弧状の長孔211eが形成されている。
The snap action mechanism 218 biases the driven arm 214 to maintain the first blade 212a and the second blade 212b in the open position when the first blade 212a and the second blade 212b are in the open position, When the first blade 212a and the second blade 212b are in the closed position, the driven arm 214 is urged so as to maintain the first blade 212a and the second blade 212b in the closed position. The snap action mechanism 218 includes a first engagement portion 211d provided on the rear cover 211b, a second engagement portion 214b provided on the driven arm 214, a first engagement portion 211d, and a second engagement portion 214b. And an urging spring 218a coupled to the. The rear cover 211b is formed with an arc-shaped long hole 211e through which the second engagement portion 214b passes when the driven arm 214 rotates.
付勢バネ218aは、コイル状に巻かれた部分と、コイル状の部分から延びる2本の腕を有するねじりコイルバネである。付勢バネ218aの一方の腕は、第1係合部211dに保持され、付勢バネ218aの他方の腕は、第2係合部214bに保持されている。この状態において、付勢バネ218aは、コイル状の部分が巻き上げられた状態となっており、第1係合部211dと第2係合部214bとを互いに離反させる方向に弾性力を発生している。付勢バネ218aは、付勢部の一例である。
The urging spring 218a is a torsion coil spring having a coiled part and two arms extending from the coiled part. One arm of the biasing spring 218a is held by the first engaging portion 211d, and the other arm of the biasing spring 218a is held by the second engaging portion 214b. In this state, the urging spring 218a is in a state where the coil-shaped portion is wound up, and generates an elastic force in a direction to separate the first engaging portion 211d and the second engaging portion 214b from each other. Yes. The biasing spring 218a is an example of a biasing portion.
第1係合部211dは、長孔211eの近傍であって、長孔211eに対して、従動アーム214の回転中心とは反対側の位置に設けられている。
The first engaging portion 211d is provided in the vicinity of the long hole 211e and on the opposite side of the long hole 211e from the rotation center of the driven arm 214.
このように構成されたスナップアクション機構218において、第1羽根212a及び第2羽根212bが開位置と閉位置との間で移動するときには、第2係合部214bは長孔211e内を円弧状に移動する。図7に、長孔211eの模式図を示す。
In the snap action mechanism 218 configured as described above, when the first blade 212a and the second blade 212b move between the open position and the closed position, the second engagement portion 214b has an arc shape in the elongated hole 211e. Moving. FIG. 7 is a schematic diagram of the long hole 211e.
長孔211eの全長は、第1羽根212a及び第2羽根212bの開位置と閉位置との間での移動範囲に相当している。第1羽根212a及び第2羽根212bが開位置に位置するときには、第2係合部214bは、長孔211eの一端部(以下、「開端部」と称する)に位置し、第1羽根212a及び第2羽根212bが閉位置に位置するときには、第2係合部214bは、長孔211eの他端部(以下、「閉端部」と称する)に位置する。第2係合部214bが長孔211eのうち開端部を含む第1領域S1に位置するときには、付勢バネ218aは、第2係合部214bを開端部に向かって付勢する。第2係合部214bが長孔211eのうち閉端部を含む第2領域S2に位置するときには、付勢バネ218aは、第2係合部214bを閉端部に向かって付勢する。第2係合部214bが長孔211eのうち第1領域S1と第2領域S2との間の第3領域S3に位置するときには、付勢バネ218aは、第2係合部214bを開端部及び閉端部の何れにも付勢していない。
The total length of the long hole 211e corresponds to the moving range between the open position and the closed position of the first blade 212a and the second blade 212b. When the first blade 212a and the second blade 212b are positioned at the open position, the second engagement portion 214b is positioned at one end portion of the elongated hole 211e (hereinafter referred to as “open end portion”). When the second blade 212b is located at the closed position, the second engagement portion 214b is located at the other end portion (hereinafter referred to as “closed end portion”) of the long hole 211e. When the second engagement portion 214b is positioned in the first region S1 including the open end portion of the long hole 211e, the biasing spring 218a biases the second engagement portion 214b toward the open end portion. When the second engagement portion 214b is located in the second region S2 including the closed end portion of the long hole 211e, the biasing spring 218a biases the second engagement portion 214b toward the closed end portion. When the second engagement portion 214b is located in the third region S3 between the first region S1 and the second region S2 in the long hole 211e, the biasing spring 218a causes the second engagement portion 214b to open and No bias is applied to any of the closed ends.
このように、付勢バネ218aは、第3領域S3を境に、第1領域S1と第2領域S2とで付勢力の方向を切り替える。例えば、第1羽根212a及び第2羽根212bが開位置から閉位置へ移動するときを考えると、第2係合部214bは、長孔211eの開端部から閉端部へ向かって移動し始める。このとき、第2係合部214bから第1係合部211dまでの距離は、徐々に短くなる。やがて、第2係合部214bは、長孔211eの第3領域S3内において第1係合部211dに最も接近する。その後、第2係合部214bは、長孔211eの閉端部に向かって移動するにつれて、徐々に第1係合部211dとの距離が拡がっていく。ここで、付勢バネ218aは、コイル状の部分が巻き上げられており、第1係合部211dと第2係合部214bとを互いに離反させる方向に弾性力を発生している。つまり、付勢バネ218aは、第1係合部211dと第2係合部214bとが最も接近したときに、最も大きな弾性力を発生する。しかし、第2係合部214dが長孔211eの第3領域S3に位置するときには、弾性力のうち、長孔211eの円周方向への成分が小さいため、第2係合部214bは開端部及び閉端部の何れへも移動せず、即ち、第1羽根212a及び第2羽根212bは開位置及び閉位置の何れへも移動しない。それに対し、第2係合部214dが長孔211eの第1領域S1に位置するときには、弾性力のうち、長孔211eの円周方向への成分が大きくなり、且つ、この円周方向への成分は、開端部の方を向いているため、第2係合部214bは開端部の方へ付勢される。つまり、第1羽根212a及び第2羽根212bは、開位置の方へ付勢される。一方、第2係合部214dが長孔211eの第2領域S2に位置するときには、弾性力のうち、長孔211eの円周方向への成分が大きくなり、且つ、この円周方向への成分は、閉端部の方を向いているため、第2係合部214bは閉端部の方へ付勢される。つまり、第1羽根212a及び第2羽根212bは、閉位置の方へ付勢される。こうして、第2係合部214bが長孔211eの第3領域S3に位置するときを基準として、第2係合部214bが長孔211eの第1領域S1に位置するときには、付勢バネ218aは、第2係合部214bを開端部の方へ、即ち、第1羽根212a及び第2羽根212bが開位置に位置するように従動アーム214を付勢する。一方、第2係合部214bが長孔211eの第2領域S2に位置するときには、付勢バネ218aは、第2係合部214bを閉端部の方へ、即ち、第1羽根212a及び第2羽根212bが閉位置に位置するように従動アーム214を付勢する。
Thus, the urging spring 218a switches the direction of the urging force between the first region S1 and the second region S2 with the third region S3 as a boundary. For example, considering that the first blade 212a and the second blade 212b move from the open position to the closed position, the second engagement portion 214b starts to move from the open end portion of the long hole 211e toward the closed end portion. At this time, the distance from the 2nd engaging part 214b to the 1st engaging part 211d becomes short gradually. Eventually, the second engagement portion 214b comes closest to the first engagement portion 211d in the third region S3 of the long hole 211e. Thereafter, as the second engaging portion 214b moves toward the closed end of the long hole 211e, the distance from the first engaging portion 211d gradually increases. Here, the urging spring 218a has a coiled portion wound up, and generates an elastic force in a direction in which the first engaging portion 211d and the second engaging portion 214b are separated from each other. That is, the urging spring 218a generates the largest elastic force when the first engagement portion 211d and the second engagement portion 214b are closest to each other. However, when the second engaging portion 214d is positioned in the third region S3 of the long hole 211e, the component of the elastic force in the circumferential direction of the long hole 211e is small, so the second engaging portion 214b is the open end portion. And the first blade 212a and the second blade 212b do not move to either the open position or the closed position. On the other hand, when the second engaging portion 214d is positioned in the first region S1 of the long hole 211e, the component of the elastic force in the circumferential direction of the long hole 211e increases, and the circumferential direction of the long hole 211e increases. Since the component is directed toward the open end, the second engagement portion 214b is urged toward the open end. That is, the first blade 212a and the second blade 212b are urged toward the open position. On the other hand, when the second engagement portion 214d is positioned in the second region S2 of the long hole 211e, the component in the circumferential direction of the long hole 211e is increased and the component in the circumferential direction is included in the elastic force. Since it faces toward the closed end, the second engagement portion 214b is urged toward the closed end. That is, the first blade 212a and the second blade 212b are urged toward the closed position. Thus, when the second engagement portion 214b is positioned in the first region S1 of the long hole 211e with reference to the time when the second engagement portion 214b is positioned in the third region S3 of the long hole 211e, the biasing spring 218a is The driven arm 214 is urged so that the second engagement portion 214b is moved toward the open end, that is, the first blade 212a and the second blade 212b are located at the open position. On the other hand, when the second engagement portion 214b is positioned in the second region S2 of the long hole 211e, the biasing spring 218a moves the second engagement portion 214b toward the closed end, that is, the first blade 212a and the second The driven arm 214 is urged so that the two blades 212b are located at the closed position.
つまり、第1羽根212a及び第2羽根212bを開位置へ移動させるべく、ステッピングモータ215が駆動アーム213を回転させ、第2係合部214bが長孔211eの第1領域S1まで移動すると、第1羽根212a及び第2羽根212bが開位置へ移動する方向へ従動アーム214が付勢バネ218aによって付勢される。一方、第1羽根212a及び第2羽根212bを閉位置へ移動させるべく、ステッピングモータ215が駆動アーム213を回転させ、第2係合部214bが長孔211eの第2領域S2まで移動すると、第1羽根212a及び第2羽根212bが閉位置へ移動する方向へ従動アーム214が付勢バネ218aによって付勢される。
That is, when the stepping motor 215 rotates the drive arm 213 to move the first blade 212a and the second blade 212b to the open position and the second engagement portion 214b moves to the first region S1 of the long hole 211e, The driven arm 214 is biased by the biasing spring 218a in the direction in which the first blade 212a and the second blade 212b move to the open position. On the other hand, when the stepping motor 215 rotates the drive arm 213 to move the first blade 212a and the second blade 212b to the closed position, and the second engagement portion 214b moves to the second region S2 of the long hole 211e, The driven arm 214 is biased by the biasing spring 218a in the direction in which the first blade 212a and the second blade 212b move to the closed position.
そして、ステッピングモータ215がオフのとき(非通電時)であっても、従動アーム214が付勢バネ218aによって付勢されているので、第1羽根212a及び第2羽根212bは、開位置又は閉位置に保持される。例えば、デジタルカメラ100の待機状態には、ステッピングモータ215がオフとなっている。デジタルカメラ100が待機状態へ移行するときには、ステッピングモータ215は、第1羽根212a及び第2羽根212bを開位置へ移動させた後にオフとなる。このような場合であっても、第1羽根212a及び第2羽根212bは付勢バネ218aの付勢力により開位置に保持される。
Even when the stepping motor 215 is off (during non-energization), since the driven arm 214 is urged by the urging spring 218a, the first blade 212a and the second blade 212b are in the open position or the closed position. Held in position. For example, when the digital camera 100 is in a standby state, the stepping motor 215 is off. When the digital camera 100 shifts to the standby state, the stepping motor 215 is turned off after the first blade 212a and the second blade 212b are moved to the open position. Even in such a case, the first blade 212a and the second blade 212b are held in the open position by the biasing force of the biasing spring 218a.
尚、スナップアクション機構218は、開位置に対する付勢力が、閉位置に対する付勢力よりも弱い。具体的には、付勢バネ218aの付勢力は、概ね第1係合部211dと第2係合部214bとを結ぶ直線の方向を向いている。そして、付勢バネ218aの付勢力の長孔211eの円周方向の成分が、第2係合部214bを開端部又は閉端部へ付勢する。そのため、付勢バネ218aの姿勢によって、長孔211eの円周方向の成分は異なる。この例では、第2係合部214bが閉端部に位置するときの長孔211eの円周方向の成分の方が、第2係合部214bが開端部に位置するときの長孔211eの円周方向の成分よりも強くなるように、付勢バネ218aの姿勢が設定されている。そのため、スナップアクション機構218の、開位置に対する付勢力が、閉位置に対する付勢力よりも弱くなっている。
In the snap action mechanism 218, the urging force for the open position is weaker than the urging force for the closed position. Specifically, the urging force of the urging spring 218a is generally in the direction of a straight line connecting the first engaging portion 211d and the second engaging portion 214b. And the component of the circumferential direction of the long hole 211e of the urging | biasing force of the urging | biasing spring 218a urges | biases the 2nd engaging part 214b to an open end part or a closed end part. Therefore, the circumferential component of the long hole 211e differs depending on the posture of the biasing spring 218a. In this example, the component in the circumferential direction of the long hole 211e when the second engagement portion 214b is located at the closed end portion is the component of the long hole 211e when the second engagement portion 214b is located at the open end portion. The posture of the biasing spring 218a is set so as to be stronger than the component in the circumferential direction. Therefore, the urging force with respect to the open position of the snap action mechanism 218 is weaker than the urging force with respect to the closed position.
また、第1羽根212a及び第2羽根212bが開位置に位置するときには、駆動アーム213の先端部がカバー211の下端縁部211fに当接する。すなわち、カバー211の下端縁部211fは、ストッパとして機能している。図5に示すように、後側カバー211bの下端縁部は、折れ曲がっており、駆動アーム213の先端部が当接するようになっている。ステッピングモータ215は、第1羽根212a及び第2羽根212bを開位置に位置させるときには、駆動アーム213の先端部がカバー211の下端縁部211fに当接する位置まで駆動アーム213を回転させている。また、待機状態においては、付勢バネ218aの付勢力によって駆動アーム213の先端部がカバー211の下端縁部211fに当接している。
Also, when the first blade 212a and the second blade 212b are in the open position, the tip of the drive arm 213 contacts the lower edge 211f of the cover 211. That is, the lower end edge portion 211f of the cover 211 functions as a stopper. As shown in FIG. 5, the lower end edge portion of the rear cover 211b is bent so that the tip end portion of the drive arm 213 comes into contact therewith. When the stepping motor 215 positions the first blade 212a and the second blade 212b in the open position, the stepping motor 215 rotates the drive arm 213 to a position where the tip end portion of the drive arm 213 contacts the lower end edge portion 211f of the cover 211. In the standby state, the front end of the drive arm 213 is in contact with the lower end edge 211f of the cover 211 by the biasing force of the biasing spring 218a.
一方、第1羽根212a及び第2羽根212bが開位置に位置するときには、従動アーム214の先端部がカバー211の上端縁部211gに当接する。すなわち、カバー211の上端縁部211gは、ストッパとして機能している。図5に示すように、後側カバー211bの上端縁部は、折れ曲がっており、従動アーム214の先端部が当接するようになっている。ステッピングモータ215が第1羽根212a及び第2羽根212bを閉位置に位置させるときには、従動アーム214の先端部をカバー211の上端縁部211gに当接する位置まで駆動アーム213を回転させている。
On the other hand, when the first blade 212a and the second blade 212b are in the open position, the tip of the driven arm 214 contacts the upper edge 211g of the cover 211. That is, the upper end edge 211g of the cover 211 functions as a stopper. As shown in FIG. 5, the upper edge of the rear cover 211b is bent so that the tip of the driven arm 214 comes into contact. When the stepping motor 215 positions the first blade 212a and the second blade 212b in the closed position, the drive arm 213 is rotated to a position where the tip of the driven arm 214 contacts the upper edge 211g of the cover 211.
<1-5.メカシャッタ157のアクチュエータ構成及び制御>
メカシャッタ157において、アクチュエータ(例えば、ステッピングモータ215)は、図11に示すように、中央に配置され、2極着磁したロータ(磁石)と、ロータの周囲に配置され、A相、B相のコイルが巻かれたステータとを有する。 <1-5. Actuator Configuration and Control ofMechanical Shutter 157>
In themechanical shutter 157, as shown in FIG. 11, an actuator (for example, a stepping motor 215) is arranged in the center, and is arranged around a rotor (magnet) that is magnetized with two poles, and has an A phase and a B phase. And a stator on which a coil is wound.
メカシャッタ157において、アクチュエータ(例えば、ステッピングモータ215)は、図11に示すように、中央に配置され、2極着磁したロータ(磁石)と、ロータの周囲に配置され、A相、B相のコイルが巻かれたステータとを有する。 <1-5. Actuator Configuration and Control of
In the
ここで、メカシャッタ157は、第1羽根212a及び第2羽根212bが開状態のときには、ステッピングモータ215の駆動力と前述の付勢バネ218aの付勢力とにより、駆動アーム213がカバー211の下端縁部211f(開側のストッパ)に押し当てられている。このとき、ステッピングモータ215は、図11に示すように、A相のコイルをS極に、B相のコイルをS極に励磁することによって、付勢バネ218aの付勢方向と同じ方向の回転力を発生させる。こうして、励磁制御することによって、より確実に駆動アーム213をストッパに押し当てておくことができるため、メカシャッタ157を閉じる際の動作をより精度良くできる。
Here, when the first blade 212 a and the second blade 212 b are in the open state, the mechanical shutter 157 has the drive arm 213 that has the lower edge of the cover 211 by the driving force of the stepping motor 215 and the biasing force of the biasing spring 218 a described above. It is pressed against the portion 211f (open side stopper). At this time, as shown in FIG. 11, the stepping motor 215 rotates in the same direction as the biasing direction of the biasing spring 218a by exciting the A-phase coil to the S pole and the B-phase coil to the S pole. Generate power. Thus, by controlling the excitation, the drive arm 213 can be more reliably pressed against the stopper, so that the operation when closing the mechanical shutter 157 can be performed with higher accuracy.
また、メカシャッタ157は、第1羽根212a及び第2羽根212bが閉状態のときには、ステッピングモータ215の駆動力と前述の付勢バネ218aの付勢力とにより、駆動アーム213がカバー211の上端縁部211g(閉側のストッパ)に押し当てられている。このとき、ステッピングモータ215は、図11に示すように、A相のコイルをN極に、B相のコイルをS極に励磁することによって、付勢バネ218aの付勢方向と同じ方向の回転力を発生させる。こうして、励磁制御することによって、より確実に従動アーム214をストッパに押し当てておくことができるため、第1羽根212a及び第2羽根212bの閉状態を確実に維持することができる。
Further, when the first blade 212a and the second blade 212b are in the closed state, the mechanical shutter 157 has the driving arm 213 that has the upper edge of the cover 211 by the driving force of the stepping motor 215 and the biasing force of the biasing spring 218a. It is pressed against 211 g (closed side stopper). At this time, as shown in FIG. 11, the stepping motor 215 rotates in the same direction as the biasing direction of the biasing spring 218a by exciting the A-phase coil to the N pole and the B-phase coil to the S pole. Generate power. In this way, by performing excitation control, the driven arm 214 can be more reliably pressed against the stopper, so that the closed state of the first blade 212a and the second blade 212b can be reliably maintained.
例えば、図12の<TYPE1>のように、励磁の制御信号を入力することによって、メカシャッタ157を作動させることができる。具体的には、ステッピングモータ215は、A相のコイルをS極に、B相のコイルをS極に励磁することによって、駆動アーム213をストッパに押し当てて、第1羽根212a及び第2羽根212bを開状態に保持する。次に、ステッピングモータ215は、A相のコイルをS極の状態から、S極、N極の順に励磁し、且つ、B相のコイルをS極の状態から、N極、N極の順に励磁することによって、第1羽根212a及び第2羽根212bを閉方向へ走査させる。最終的に、ステッピングモータ215は、A相のコイルをN極に、B相のコイルをS極に励磁することによって、従動アーム214をストッパに押し当てて、第1羽根212a及び第2羽根212bを閉状態に保持する。
For example, as shown in <TYPE 1> in FIG. 12, the mechanical shutter 157 can be operated by inputting an excitation control signal. Specifically, the stepping motor 215 presses the drive arm 213 against the stopper by exciting the A-phase coil to the S pole and the B-phase coil to the S pole, so that the first blade 212a and the second blade 212b is held open. Next, the stepping motor 215 excites the A-phase coil from the S-pole state in the order of S-pole and N-pole, and the B-phase coil from the S-pole state in the order of N-pole and N-pole. Thus, the first blade 212a and the second blade 212b are scanned in the closing direction. Finally, the stepping motor 215 presses the driven arm 214 against the stopper by exciting the A-phase coil to the N pole and the B-phase coil to the S pole, and thereby the first blade 212a and the second blade 212b. Is kept closed.
尚、図12の<TYPE2>のように、励磁の制御信号を入力することによっても、メカシャッタ157を作動させることができる。具体的には、ステッピングモータ215は、A相のコイルをS極に、B相のコイルをS極に励磁することによって、駆動アーム213をストッパに押し当てて、第1羽根212a及び第2羽根212bを開状態に保持する。次に、ステッピングモータ215は、A相のコイルをS極の状態からN極に励磁し、且つ、B相のコイルをS極の状態からN極に励磁することによって、第1羽根212a及び第2羽根212bを閉方向へ走査させる。最終的に、ステッピングモータ215は、A相のコイルをN極に、B相のコイルをS極に励磁することによって、従動アーム214をストッパに押し当てて、第1羽根212a及び第2羽根212bを閉状態に保持する。
The mechanical shutter 157 can also be operated by inputting an excitation control signal as shown in <TYPE 2> in FIG. Specifically, the stepping motor 215 presses the drive arm 213 against the stopper by exciting the A-phase coil to the S pole and the B-phase coil to the S pole, so that the first blade 212a and the second blade 212b is held open. Next, the stepping motor 215 excites the A-phase coil from the S-pole state to the N-pole, and the B-phase coil from the S-pole state to the N-pole, whereby the first blade 212a and the first The two blades 212b are scanned in the closing direction. Finally, the stepping motor 215 presses the driven arm 214 against the stopper by exciting the A-phase coil to the N pole and the B-phase coil to the S pole, and thereby the first blade 212a and the second blade 212b. Is kept closed.
<2.動作>
<2-1.カメラコントローラ153による制御>
カメラコントローラ153は、図8に示すように、各部を制御する。 <2. Operation>
<2-1. Control byCamera Controller 153>
Thecamera controller 153 controls each unit as shown in FIG.
<2-1.カメラコントローラ153による制御>
カメラコントローラ153は、図8に示すように、各部を制御する。 <2. Operation>
<2-1. Control by
The
カメラコントローラ153は、使用者によってカメラボディ102の電源がオンにされると、待機制御を行う。カメラコントローラ153は、待機制御において、CMOSイメージセンサ150で得られる画像データを液晶モニタ163にスルー画像として表示する。また、カメラコントローラ153は、待機制御を行う。待機制御の詳細については後述する。
The camera controller 153 performs standby control when the power of the camera body 102 is turned on by the user. The camera controller 153 displays the image data obtained by the CMOS image sensor 150 on the liquid crystal monitor 163 as a through image in standby control. The camera controller 153 performs standby control. Details of the standby control will be described later.
カメラコントローラ153は、使用者によってレリーズ釦160が全押し(オン)されると、露光制御を行う。カメラコントローラ153は、露光制御において、CMOSイメージセンサ150とメカシャッタ157とを制御することで、電子先幕を実現する。カメラコントローラ153は、メカシャッタ157の第1羽根212a及び第2羽根212bによりアパーチャ211cを遮蔽している間に画像データ(静止画像)の読み出しを行う。そして、画像データの読み出しを完了すると、カメラコントローラ153は、第1羽根212a及び第2羽根212bを開位置へ移動させる。露光制御の詳細については後述する。
The camera controller 153 performs exposure control when the release button 160 is fully pressed (turned on) by the user. The camera controller 153 realizes an electronic front curtain by controlling the CMOS image sensor 150 and the mechanical shutter 157 in exposure control. The camera controller 153 reads out image data (still image) while the aperture 211c is shielded by the first blade 212a and the second blade 212b of the mechanical shutter 157. When reading of the image data is completed, the camera controller 153 moves the first blade 212a and the second blade 212b to the open position. Details of the exposure control will be described later.
撮影が完了すると、カメラコントローラ153は、待機制御に戻る。
When the photographing is completed, the camera controller 153 returns to standby control.
その後、カメラコントローラ153は、使用者によってカメラボディ102の電源がオフにされると、カメラボディ102の各部への電力供給を停止する。
Thereafter, when the power of the camera body 102 is turned off by the user, the camera controller 153 stops the power supply to each part of the camera body 102.
<2-2.露光制御>
まず、カメラコントローラ153による露光制御を説明する。カメラコントローラ153は、CMOSイメージセンサ150を制御し、先幕として電子シャッタを実行する。その後、カメラコントローラ153は、メカシャッタ157を制御し、後幕として機能させる。これによって、撮像動作を実行する。 <2-2. Exposure control>
First, exposure control by thecamera controller 153 will be described. The camera controller 153 controls the CMOS image sensor 150 and executes an electronic shutter as a front curtain. Thereafter, the camera controller 153 controls the mechanical shutter 157 to function as a rear curtain. Thereby, the imaging operation is executed.
まず、カメラコントローラ153による露光制御を説明する。カメラコントローラ153は、CMOSイメージセンサ150を制御し、先幕として電子シャッタを実行する。その後、カメラコントローラ153は、メカシャッタ157を制御し、後幕として機能させる。これによって、撮像動作を実行する。 <2-2. Exposure control>
First, exposure control by the
ここで、カメラコントローラ153は、後幕であるメカシャッタ157の軌跡に対して、先幕である電子シャッタの軌跡をより近似したものにするため、以下の調整を行う。
Here, the camera controller 153 performs the following adjustment in order to make the locus of the electronic shutter as the front curtain more approximate to the locus of the mechanical shutter 157 as the rear curtain.
(1)先幕である電子シャッタの走査パターンを、ライン毎にスピード調整する。例えば、開始ラインから終了ラインに向けて、次のラインへの走査スピードが徐々に早くなるようにする。これは、メカシャッタ157のスピードが閉じ始めと閉じ終わりとで徐々に速くなるためである。
(1) Adjust the speed of the scanning pattern of the electronic shutter, which is the front curtain, for each line. For example, the scanning speed to the next line is gradually increased from the start line to the end line. This is because the speed of the mechanical shutter 157 gradually increases at the beginning and end of closing.
(2)先幕である電子シャッタの走査パターンを、装置自身の温度に応じて、調整する。これは、アクチュエータ(ステッピングモータ215)の温度が高いと、アクチュエータのトルクが下がり、メカシャッタ157のスピードが全体的に落ちるためである。具体的には、ステッピングモータ215のコイルの温度が上がると、抵抗が上がり、電流値が下がる。そのため、電流値が下がることによって、トルクが下がる結果となる。また、ステッピングモータの磁石の温度が上がると、磁力が落ちる。そのため、磁力が落ちることによって、トルクが下がる結果となる。
(2) Adjust the scanning pattern of the electronic shutter, which is the front curtain, according to the temperature of the device itself. This is because when the temperature of the actuator (stepping motor 215) is high, the torque of the actuator decreases and the speed of the mechanical shutter 157 decreases as a whole. Specifically, when the temperature of the coil of the stepping motor 215 increases, the resistance increases and the current value decreases. For this reason, the torque decreases as the current value decreases. Further, when the temperature of the magnet of the stepping motor increases, the magnetic force decreases. As a result, the torque is reduced due to the drop of the magnetic force.
具体的な処理を図10に示すフローチャートを用いて説明する。
Specific processing will be described with reference to the flowchart shown in FIG.
カメラコントローラ153は、レリーズオンになる(レリーズ釦160が全押しされる)と、装置自身(デジタルカメラ100、メカシャッタ157及びステッピングモータ215の何れか)の温度等を考慮して、電子シャッタの走査パターンを調整し、CMOSイメージセンサ150に対して電子シャッタの制御を行う(T1)。
When the release is turned on (the release button 160 is fully pressed), the camera controller 153 scans the electronic shutter in consideration of the temperature of the device itself (any of the digital camera 100, the mechanical shutter 157, and the stepping motor 215). The pattern is adjusted and the electronic shutter is controlled for the CMOS image sensor 150 (T1).
そして、カメラコントローラ153は、ステッピングモータ215の励磁をオンにし、駆動アーム213をストッパ(カバー211の下端縁部211f)に押し当てる(T2)。これは、メカシャッタ157の駆動制御をより精度良くするためである。
Then, the camera controller 153 turns on the excitation of the stepping motor 215 and presses the drive arm 213 against the stopper (the lower end edge 211f of the cover 211) (T2). This is to make the drive control of the mechanical shutter 157 more accurate.
その後、カメラコントローラ153は、電子シャッタ開始後にシャッタースピードの時間だけ待機し(T3)、メカシャッタ157の第1羽根212a及び第2羽根212bを閉方向へ移動させる(T4)。
Thereafter, the camera controller 153 waits for the shutter speed time after the electronic shutter is started (T3), and moves the first blade 212a and the second blade 212b of the mechanical shutter 157 in the closing direction (T4).
そして、カメラコントローラ153は、ステッピングモータ215の励磁をオンにし、従動アーム214をストッパ(カバー211の上端縁部211g)に押し当てる(T5)。これは、メカシャッタ157の遮蔽をより確実にするためである。
Then, the camera controller 153 turns on the excitation of the stepping motor 215 and presses the driven arm 214 against the stopper (the upper edge 211g of the cover 211) (T5). This is to make the shielding of the mechanical shutter 157 more reliable.
その後、カメラコントローラ153は、CMOSイメージセンサ150より静止画像の画像データを読み出す(T6)。
Thereafter, the camera controller 153 reads out still image data from the CMOS image sensor 150 (T6).
読み出しが完了すると、カメラコントローラ153は、第1羽根212a及び第2羽根212bを開方向へ移動させる(T7)。
When the reading is completed, the camera controller 153 moves the first blade 212a and the second blade 212b in the opening direction (T7).
<2-3.待機制御>
続いて、図9を用いて、待機制御について説明する。露光制御で説明したように、ステッピングモータ215の温度が上昇すると、電子シャッタの走査パターンを調整する必要がある。そのため、待機制御では、可能な限り、ステッピングモータ215の励磁をオフにするよう制御を行っている。一方で、メカシャッタ157は、ステッピングモータ215の励磁をオフにすると、カメラボディ102に衝撃が作用したときに、第1羽根212a及び第2羽根212bが待機状態において位置すべき位置から移動してしまう虞がある。 <2-3. Standby control>
Next, standby control will be described with reference to FIG. As described in the exposure control, when the temperature of the steppingmotor 215 rises, it is necessary to adjust the scanning pattern of the electronic shutter. Therefore, in standby control, control is performed to turn off the excitation of the stepping motor 215 as much as possible. On the other hand, when the excitation of the stepping motor 215 is turned off, the mechanical shutter 157 moves from the position where the first blade 212a and the second blade 212b should be positioned in the standby state when an impact is applied to the camera body 102. There is a fear.
続いて、図9を用いて、待機制御について説明する。露光制御で説明したように、ステッピングモータ215の温度が上昇すると、電子シャッタの走査パターンを調整する必要がある。そのため、待機制御では、可能な限り、ステッピングモータ215の励磁をオフにするよう制御を行っている。一方で、メカシャッタ157は、ステッピングモータ215の励磁をオフにすると、カメラボディ102に衝撃が作用したときに、第1羽根212a及び第2羽根212bが待機状態において位置すべき位置から移動してしまう虞がある。 <2-3. Standby control>
Next, standby control will be described with reference to FIG. As described in the exposure control, when the temperature of the stepping
さらに、メカシャッタ157においては、スナップアクション機構218により、第1羽根212a及び第2羽根212bが開位置及び閉位置の何れかに付勢されている。そのため、衝撃が小さい限りにおいては、付勢バネ218aの付勢力により、第1羽根212a及び第2羽根212bは、開位置及び閉位置のうち待機状態において位置すべき方に保持される。しかしながら、スナップアクション機構218は、第1羽根212a及び第2羽根212bを保持できる反面、前述の如く、基準位置を境にして、付勢力の方向が切り替わるように構成されている。そのため、衝撃が大きく、第1羽根212a及び第2羽根212bが付勢バネ218aの付勢力に抗して移動し、第1羽根212a及び第2羽根212bが、付勢バネ218aの付勢力の方向が切り替わる位置まで移動してしまった場合には、第1羽根212a及び第2羽根212bは、付勢バネ218aの付勢力により、開位置及び閉位置のうち待機状態に対応する位置とは反対の位置に移動させられてしまう。
Furthermore, in the mechanical shutter 157, the first blade 212a and the second blade 212b are biased to either the open position or the closed position by the snap action mechanism 218. Therefore, as long as the impact is small, the biasing force of the biasing spring 218a holds the first blade 212a and the second blade 212b in the open position and the closed position that should be positioned in the standby state. However, while the snap action mechanism 218 can hold the first blade 212a and the second blade 212b, as described above, the direction of the urging force is switched with the reference position as a boundary. Therefore, the impact is great, the first blade 212a and the second blade 212b move against the biasing force of the biasing spring 218a, and the first blade 212a and the second blade 212b move in the direction of the biasing force of the biasing spring 218a. When the first blade 212a and the second blade 212b have moved to the position where the first and second blades are switched, the biasing force of the biasing spring 218a is opposite to the position corresponding to the standby state among the open position and the closed position. It will be moved to the position.
特に、付勢バネ218aの開位置への付勢力は閉位置への付勢力よりも弱いので、閉位置から開位置へよりも開位置から閉位置への方が、衝撃が加わった際に第1羽根212a及び第2羽根212bが移動し易くなっている。そして、この例では、待機状態における第1羽根212a及び第2羽根212bの位置は開位置に設定されているため、第1羽根212a及び第2羽根212bが閉位置に位置する場合と比べて、衝撃が加わった際に、第1羽根212a及び第2羽根212bが反対側の位置へ移動し易くなっている。
In particular, the urging force of the urging spring 218a toward the open position is weaker than the urging force toward the closed position. Therefore, when the shock is applied from the open position to the closed position rather than from the closed position to the open position. The first blade 212a and the second blade 212b are easy to move. In this example, since the positions of the first blade 212a and the second blade 212b in the standby state are set to the open position, compared to the case where the first blade 212a and the second blade 212b are positioned to the closed position, When an impact is applied, the first blade 212a and the second blade 212b are easily moved to opposite positions.
そのため、カメラコントローラ153は、以下のように待機制御を行う。
Therefore, the camera controller 153 performs standby control as follows.
カメラコントローラ153は、待機制御になると、ステッピングモータ215に対する励磁をオフにする(S1)。これにより、消費電力が低減され、ステッピングモータ215の温度上昇が抑制される。通常の待機状態では、この状態となっている。
The camera controller 153 turns off the excitation for the stepping motor 215 when it enters standby control (S1). Thereby, power consumption is reduced and the temperature rise of the stepping motor 215 is suppressed. This is the normal standby state.
その後、カメラコントローラ153は、加速度センサ158の出力が所定値以上となったか否かを判定する(S2)。カメラコントローラ153は、加速度センサ158の出力が所定値以上でない場合、ステッピングモータ215に対する励磁のオフを継続する。つまり、カメラコントローラ153は、カメラボディ102に作用する加速度が所定加速度以上となるか否かを監視し、加速度が所定加速度未満である限りはステッピングモード215の非作動状態を継続する。
Thereafter, the camera controller 153 determines whether or not the output of the acceleration sensor 158 is equal to or greater than a predetermined value (S2). When the output of the acceleration sensor 158 is not equal to or greater than the predetermined value, the camera controller 153 continues turning off the excitation for the stepping motor 215. That is, the camera controller 153 monitors whether or not the acceleration acting on the camera body 102 is equal to or higher than the predetermined acceleration, and continues the inoperative state of the stepping mode 215 as long as the acceleration is less than the predetermined acceleration.
一方、カメラコントローラ153は、加速度センサ158の出力が所定値以上となった場合には、ステッピングモータ215に対する励磁をオンにする(S3)。詳しくは、カメラコントローラ153は、第1羽根212a及び第2羽根212bを開位置に保持する、即ち、駆動アーム213をストッパ(カバー211の下端縁部211f)に押し当てるように、ステッピングモータ215に電流を供給する。
On the other hand, when the output of the acceleration sensor 158 exceeds a predetermined value, the camera controller 153 turns on the excitation for the stepping motor 215 (S3). Specifically, the camera controller 153 holds the first blade 212a and the second blade 212b in the open position, i.e., presses the driving arm 213 against the stopper (the lower end edge 211f of the cover 211). Supply current.
そして、カメラコントローラ153は、ステッピングモータ215に対する励磁をオンにした状態で所定時間待機する(S4)。所定時間経過すると、カメラコントローラ153は、ステップS1に戻り、ステッピングモータ215に対する励磁をオフにし、通常の待機状態に戻る。
Then, the camera controller 153 waits for a predetermined time with the excitation for the stepping motor 215 turned on (S4). When the predetermined time has elapsed, the camera controller 153 returns to step S1, turns off the excitation for the stepping motor 215, and returns to the normal standby state.
<3.効果等>
以上のように、デジタルカメラ100は、アパーチャ211cを有するカバー211と、カバー211に保持され、アパーチャ211cを遮蔽する閉位置とアパーチャ211cを開く開位置との間を移動する幕ユニット212と、幕ユニット212を駆動するステッピングモータ215と、ステッピングモータ215を制御するカメラコントローラ153と、カメラボディ102の加速度を検知する加速度センサ158とを備え、ステッピングモータ215がオフとなっている待機状態においては、幕ユニット212は、閉位置又は開位置に位置しており、カメラコントローラ153は、待機状態において加速度センサ158が所定値以上の加速度を検知したときに、ステッピングモータ215をオンにして、幕ユニット212を待機状態に対応する閉位置又は開位置に保持する。 <3. Effect>
As described above, thedigital camera 100 includes the cover 211 having the aperture 211c, the curtain unit 212 that is held by the cover 211 and moves between the closed position that shields the aperture 211c and the open position that opens the aperture 211c, and the curtain. In a standby state in which a stepping motor 215 that drives the unit 212, a camera controller 153 that controls the stepping motor 215, and an acceleration sensor 158 that detects the acceleration of the camera body 102 are provided and the stepping motor 215 is off. The curtain unit 212 is located at the closed position or the open position, and the camera controller 153 turns on the stepping motor 215 when the acceleration sensor 158 detects an acceleration of a predetermined value or more in the standby state, and the curtain unit 212 is turned on. On standby Held in the closed position or the open position to respond.
以上のように、デジタルカメラ100は、アパーチャ211cを有するカバー211と、カバー211に保持され、アパーチャ211cを遮蔽する閉位置とアパーチャ211cを開く開位置との間を移動する幕ユニット212と、幕ユニット212を駆動するステッピングモータ215と、ステッピングモータ215を制御するカメラコントローラ153と、カメラボディ102の加速度を検知する加速度センサ158とを備え、ステッピングモータ215がオフとなっている待機状態においては、幕ユニット212は、閉位置又は開位置に位置しており、カメラコントローラ153は、待機状態において加速度センサ158が所定値以上の加速度を検知したときに、ステッピングモータ215をオンにして、幕ユニット212を待機状態に対応する閉位置又は開位置に保持する。 <3. Effect>
As described above, the
このようにすれば、ステッピングモータ215の温度上昇を抑えつつ、メカシャッタ157、即ち、幕ユニット212の誤動作を軽減できる。
This makes it possible to reduce the malfunction of the mechanical shutter 157, that is, the curtain unit 212, while suppressing the temperature rise of the stepping motor 215.
また、デジタルカメラ100は、幕ユニット212を閉位置及び開位置のそれぞれに向けて付勢する付勢バネ218aをさらに備え、幕ユニット212は待機状態において、付勢バネ218aの付勢力を受けた状態で待機状態に対応する閉位置又は開位置に位置している。
The digital camera 100 further includes a biasing spring 218a that biases the curtain unit 212 toward the closed position and the open position. The curtain unit 212 receives the biasing force of the biasing spring 218a in the standby state. In the state, it is located at the closed position or the open position corresponding to the standby state.
つまり、待機状態において、幕ユニット212は、基本的には、付勢バネ218aにより閉位置及び開位置の何れかに保持されている。
That is, in the standby state, the curtain unit 212 is basically held in either the closed position or the open position by the biasing spring 218a.
さらに、付勢バネ218aは、幕ユニット212の閉位置と開位置との間の移動範囲における、開位置を含む所定の第1領域S1においては幕ユニット212を開位置へ付勢する一方、移動範囲における、閉位置を含む所定の第2領域S2においては幕ユニットを閉位置へ付勢する。
Further, the urging spring 218a urges the curtain unit 212 to the open position in the predetermined first area S1 including the open position in the movement range between the closed position and the open position of the curtain unit 212, while moving. In the predetermined second region S2 in the range including the closed position, the curtain unit is biased to the closed position.
つまり、付勢バネ218aは、幕ユニット212の閉位置と開位置との間の移動範囲内において付勢方向を切り替えるように構成されている。これにより、1つの付勢バネ218aによって、幕ユニット212の閉方向への付勢と開方向への付勢を実現することができる。また、このように付勢方向が切り替わる付勢バネ218aにおいては、衝撃力により幕ユニット212が移動し、付勢バネ218aの付勢方向が切り替わった場合には、幕ユニット212が本来位置すべき位置とは反対側の位置へ容易に移動してしまう。そのため、前述の待機制御が特に有効となる。
That is, the biasing spring 218a is configured to switch the biasing direction within the movement range between the closed position and the open position of the curtain unit 212. Thus, the urging in the closing direction and the urging in the opening direction of the curtain unit 212 can be realized by one urging spring 218a. Further, in the urging spring 218a in which the urging direction is switched in this way, the curtain unit 212 should be originally positioned when the urging direction of the urging spring 218a is switched by the impact force. It easily moves to a position opposite to the position. Therefore, the above-described standby control is particularly effective.
具体的には、付勢バネ218aは、前記移動範囲において、第1領域S1と第2領域S2との間の第3領域S3を境に幕ユニット212を付勢する方向が切り替わる。
Specifically, the biasing spring 218a switches the direction in which the curtain unit 212 is biased with respect to the third region S3 between the first region S1 and the second region S2 in the movement range.
また、デジタルカメラ100では、幕ユニット212の開状態において、付勢バネ218aの付勢力によって駆動アーム213がストッパに押し当てられると共に、ステッピングモータ215の励磁によりさらに駆動アーム213がストッパに押し当てられる。
In the digital camera 100, when the curtain unit 212 is open, the driving arm 213 is pressed against the stopper by the biasing force of the biasing spring 218a, and the driving arm 213 is further pressed against the stopper by the excitation of the stepping motor 215. .
これにより、駆動アーム213をストッパにより確実に押し当てておくことができる。そのため、幕ユニット212の開状態における位置決めを正確に行うことができるので、幕ユニット212を閉位置へ移動させる際の動作をより精度良く行うことができる。
Thereby, the drive arm 213 can be reliably pressed by the stopper. Therefore, since the positioning of the curtain unit 212 in the open state can be performed accurately, the operation for moving the curtain unit 212 to the closed position can be performed with higher accuracy.
また、デジタルカメラ100では、幕ユニット212の閉状態において、付勢バネ218aの付勢力によって従動アーム214がストッパに押し当てられると共に、ステッピングモータ215の励磁によりさらに従動アーム214がストッパに押し当てられる。
Further, in the digital camera 100, the driven arm 214 is pressed against the stopper by the biasing force of the biasing spring 218a in the closed state of the curtain unit 212, and the driven arm 214 is further pressed against the stopper by excitation of the stepping motor 215. .
これにより、幕ユニット212によるアパーチャ211cの遮蔽状態をより確実に維持できる。
Thereby, the shielding state of the aperture 211c by the curtain unit 212 can be more reliably maintained.
(他の特徴の付記)
開口部を有し、メカ端である閉ストッパ及び開ストッパを有するカバーと、
前記閉ストッパに当接して前記開口部を遮蔽する位置と、前記開ストッパに当接して前記開口部を遮蔽しない(開く)位置との間を移動するように前記カバーに保持された幕機構と、
前記幕機構を駆動するアクチュエータと、
前記アクチュエータを制御する制御部とを備え、
前記幕機構は、前記遮蔽する位置と前記遮蔽しない位置との間における所定の境界を基準にして、
前記遮蔽する位置側に存在する場合、当該遮蔽する位置へ第1の付勢力で付勢され、
前記遮蔽しない位置側に存在する場合、当該遮蔽する位置へ第2の付勢力で付勢されており、
前記アクチュエータは、
前記幕機構が第1の付勢力により閉ストッパに当接した状態において、前記幕機構を更に前記閉ストッパに押し当てる動力を発生し、
前記幕機構が第2の付勢力により開ストッパに当接した状態において、前記幕機構を更に前記開ストッパに押し当てる動力を発生する撮像装置。 (Additional notes on other features)
A cover having an opening and having a closing stopper and an opening stopper which are mechanical ends;
A curtain mechanism that is held by the cover so as to move between a position that contacts the closing stopper and shields the opening, and a position that contacts the opening stopper and does not shield (open) the opening; ,
An actuator for driving the curtain mechanism;
A control unit for controlling the actuator,
The curtain mechanism is based on a predetermined boundary between the shielding position and the non-shielding position,
When present on the shielding position side, it is urged by the first urging force to the shielding position,
When present on the non-shielding position side, the second biasing force is applied to the shielding position,
The actuator is
In a state where the curtain mechanism is in contact with the closing stopper by the first urging force, power is generated to further press the curtain mechanism against the closing stopper,
An imaging apparatus that generates power for further pressing the curtain mechanism against the opening stopper in a state where the curtain mechanism is in contact with the opening stopper by a second urging force.
開口部を有し、メカ端である閉ストッパ及び開ストッパを有するカバーと、
前記閉ストッパに当接して前記開口部を遮蔽する位置と、前記開ストッパに当接して前記開口部を遮蔽しない(開く)位置との間を移動するように前記カバーに保持された幕機構と、
前記幕機構を駆動するアクチュエータと、
前記アクチュエータを制御する制御部とを備え、
前記幕機構は、前記遮蔽する位置と前記遮蔽しない位置との間における所定の境界を基準にして、
前記遮蔽する位置側に存在する場合、当該遮蔽する位置へ第1の付勢力で付勢され、
前記遮蔽しない位置側に存在する場合、当該遮蔽する位置へ第2の付勢力で付勢されており、
前記アクチュエータは、
前記幕機構が第1の付勢力により閉ストッパに当接した状態において、前記幕機構を更に前記閉ストッパに押し当てる動力を発生し、
前記幕機構が第2の付勢力により開ストッパに当接した状態において、前記幕機構を更に前記開ストッパに押し当てる動力を発生する撮像装置。 (Additional notes on other features)
A cover having an opening and having a closing stopper and an opening stopper which are mechanical ends;
A curtain mechanism that is held by the cover so as to move between a position that contacts the closing stopper and shields the opening, and a position that contacts the opening stopper and does not shield (open) the opening; ,
An actuator for driving the curtain mechanism;
A control unit for controlling the actuator,
The curtain mechanism is based on a predetermined boundary between the shielding position and the non-shielding position,
When present on the shielding position side, it is urged by the first urging force to the shielding position,
When present on the non-shielding position side, the second biasing force is applied to the shielding position,
The actuator is
In a state where the curtain mechanism is in contact with the closing stopper by the first urging force, power is generated to further press the curtain mechanism against the closing stopper,
An imaging apparatus that generates power for further pressing the curtain mechanism against the opening stopper in a state where the curtain mechanism is in contact with the opening stopper by a second urging force.
《その他の実施形態》
以上のように、本出願において開示する技術の例示として、実施形態1を説明した。しかしながら、本開示における技術は、これに限定されず、適宜、変更、置き換え、付加、省略などを行った実施の形態にも適用可能である。 << Other Embodiments >>
As described above, the first embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed.
以上のように、本出願において開示する技術の例示として、実施形態1を説明した。しかしながら、本開示における技術は、これに限定されず、適宜、変更、置き換え、付加、省略などを行った実施の形態にも適用可能である。 << Other Embodiments >>
As described above, the first embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed.
そこで、以下、他の実施の形態を例示する。
Therefore, other embodiments will be exemplified below.
デジタルカメラ100の構成は、例示に過ぎず、前記の構成に限定されるものではない。例えば、デジタルカメラ100は、カメラボディ102と、カメラボディ102に装着可能な交換レンズ101とを備えているが、カメラボディ102とレンズ101とが取り外し不能であってもよい。
The configuration of the digital camera 100 is merely an example, and is not limited to the above configuration. For example, the digital camera 100 includes the camera body 102 and the interchangeable lens 101 that can be attached to the camera body 102, but the camera body 102 and the lens 101 may not be removable.
以上の説明では、加速度センサ158を用いた例を説明した。しかし、加速度センサ158の代わりに、衝撃センサを用いてもよい。この場合、カメラコントローラ153は、待機制御において、所定値以上の衝撃(衝撃力)を検知した場合、ステッピングモータ215の励磁をオンにするとよい。なお、加速度センサ158は、カメラボディ102の単位時間当たりの移動を検知できるセンサであってもよい。
In the above description, an example using the acceleration sensor 158 has been described. However, an impact sensor may be used instead of the acceleration sensor 158. In this case, the camera controller 153 may turn on the excitation of the stepping motor 215 when detecting an impact (impact force) of a predetermined value or more in the standby control. The acceleration sensor 158 may be a sensor that can detect the movement of the camera body 102 per unit time.
尚、前記実施形態では、加速度センサ158が検出加速度の方向を限定していないが、加速度の方向を限定してもよい。例えば、加速度センサ158は、幕ユニット212の移動方向に対応する方向、即ち、鉛直方向の加速度を検出するように構成され、カメラコントローラ153は、鉛直方向の加速度に基づいて前記待機制御を行うようにしてもよい。また、加速度センサ158は、直交3軸の加速度を検出するものであってもよい。その場合、カメラコントローラ153は、3方向の加速度うち幕ユニット212の移動方向に近い方向の加速度に基づいて待機制御を行ってもよいし、3方向の加速度から幕ユニット212の移動方向の加速度を算出し、算出した加速度に基づいて待機制御を行ってもよい。
In addition, in the said embodiment, although the acceleration sensor 158 does not limit the direction of detected acceleration, you may limit the direction of acceleration. For example, the acceleration sensor 158 is configured to detect a direction corresponding to the moving direction of the curtain unit 212, that is, a vertical direction acceleration, and the camera controller 153 performs the standby control based on the vertical direction acceleration. It may be. Further, the acceleration sensor 158 may detect an acceleration of three orthogonal axes. In that case, the camera controller 153 may perform standby control based on the acceleration in the direction close to the moving direction of the curtain unit 212 among the accelerations in the three directions, or the acceleration in the moving direction of the curtain unit 212 from the acceleration in the three directions. The standby control may be performed based on the calculated acceleration.
メカシャッタ157には、幕ユニット212のロック機構が設けられていない。しかし、メカシャッタ157には、開位置及び/又は閉位置において幕ユニット212の移動を規制する機械的なロック機構(以下、メカロックと称する)を採用してもよい。この場合、図13のフローチャートに示すように、カメラコントローラ153は、メカシャッタ157を制御する。カメラコントローラ153は、使用者によってカメラボディ102の電源がオフにされると、幕ユニット212のメカロックをオン(施錠)にした後(S11)、カメラボディ102の電源をオフにする(S12)。その後、カメラコントローラ153は、使用者によってカメラボディ102の電源がオンにされると、カメラボディ102の電源をオンにした後(S13)、幕ユニット212のメカロックをオフ(解錠)にする(S14)。このようにすれば、メカシャッタ157の幕ユニット212が、カメラボディ102の電源オフ中に誤動作で移動してしまう(例えば、開状態から閉状態になってしまう)ことを防止することができる。
The mechanical shutter 157 is not provided with a lock mechanism for the curtain unit 212. However, the mechanical shutter 157 may employ a mechanical lock mechanism (hereinafter referred to as a mechanical lock) that restricts the movement of the curtain unit 212 in the open position and / or the closed position. In this case, as shown in the flowchart of FIG. 13, the camera controller 153 controls the mechanical shutter 157. When the power of the camera body 102 is turned off by the user, the camera controller 153 turns on (locks) the mechanical lock of the curtain unit 212 (S11), and then turns off the power of the camera body 102 (S12). Thereafter, when the power of the camera body 102 is turned on by the user, the camera controller 153 turns off the power of the camera body 102 (S13) and then turns off (unlocks) the mechanical lock of the curtain unit 212 ( S14). In this way, it is possible to prevent the curtain unit 212 of the mechanical shutter 157 from moving erroneously while the camera body 102 is powered off (for example, from the open state to the closed state).
また、ロック機構を採用した他の例としては、図14に示すフローチャートのように、カメラコントローラ153は、メカロックをオンにした状態をレリーズオンになるまで保持するようにしてもよい。具体的には、カメラコントローラ153は、メカロックがオンの状態においてレリーズがオンになると(S21)、メカロックをオフにする(S22)。そして、カメラコントローラ153は、メカシャッタ157の幕ユニット212を用いた撮像動作を実行する。その後、カメラコントローラ153は、メカシャッタ157の幕ユニット212を開位置へ移動させ(S23)、幕ユニット212が閉位置まで移動するとメカロックをオンにする(S24)。このようにすれば、メカシャッタ157の幕ユニット212が、カメラボディ102の電源オフ中及びレリーズの待機中に誤動作で移動してしまう(例えば、開状態から閉状態になってしまう)ことを防止することができる。
As another example employing the lock mechanism, as shown in the flowchart of FIG. 14, the camera controller 153 may hold the state in which the mechanical lock is turned on until the release is turned on. Specifically, the camera controller 153 turns off the mechanical lock (S22) when the release is turned on while the mechanical lock is on (S21). Then, the camera controller 153 performs an imaging operation using the curtain unit 212 of the mechanical shutter 157. Thereafter, the camera controller 153 moves the curtain unit 212 of the mechanical shutter 157 to the open position (S23), and turns on the mechanical lock when the curtain unit 212 moves to the closed position (S24). In this way, it is possible to prevent the curtain unit 212 of the mechanical shutter 157 from moving erroneously (for example, from the open state to the closed state) while the camera body 102 is powered off and during the release standby. be able to.
また、以上の説明では、待機状態における幕ユニット212の位置は開位置に設定されているが、待機状態における幕ユニット212の位置を閉位置としてもよい。
In the above description, the position of the curtain unit 212 in the standby state is set to the open position, but the position of the curtain unit 212 in the standby state may be set to the closed position.
また、カバー211の下端縁部211f及び上端縁部211gがストッパを形成しているが、ストッパの構成はこれに限られるものではない。幕ユニット212が開状態又は閉状態のときに、第1羽根212a、第2羽根212b、駆動アーム213及び従動アーム214の何れかと物理的に当接して、幕ユニット212の移動を規制する構成であれば、任意の構成のストッパを採用することができる。
Further, the lower end edge 211f and the upper end edge 211g of the cover 211 form a stopper, but the configuration of the stopper is not limited to this. When the curtain unit 212 is in an open state or a closed state, the curtain unit 212 is physically brought into contact with any one of the first blade 212a, the second blade 212b, the drive arm 213, and the driven arm 214 to restrict the movement of the curtain unit 212. If there is, a stopper having an arbitrary configuration can be adopted.
さらに、カメラコントローラ153は、待機制御において、所定加速度以上の加速度が検知されたときに、駆動アーム213をストッパに押し当てるように、ステッピングモータ215を作動させているが、待機制御におけるステッピングモータ215の制御は、これに限られるものではない。例えば、カメラコントローラ153は、待機制御において、所定加速度以上の加速度が検知されたときに、第1羽根212a及び第2羽根212bが開位置に位置するだけの電流をステッピングモータ215に供給するようにしてもよい。すなわち、前述の説明では、駆動アーム213をストッパに押し当てるために、ステッピングモータ215は、第1羽根212a及び第2羽根212bが開位置よりもさらに開方向へ移動するような電流を供給している。しかしながら、ステッピングモータ215は、ストッパとの協働でなくても、第1羽根212a及び第2羽根212bを開位置に保持できるので、カメラコントローラ153は、第1羽根212a及び第2羽根212bを開位置に位置させるだけの電流をステッピングモータ215に供給するようにしてもよい。ただし、第1羽根212a及び第2羽根212bを開位置に保持する際に、駆動アーム213がストッパに当接することを排除するものではない。
Further, the camera controller 153 operates the stepping motor 215 so as to press the drive arm 213 against the stopper when an acceleration equal to or higher than a predetermined acceleration is detected in the standby control, but the stepping motor 215 in the standby control. This control is not limited to this. For example, in the standby control, the camera controller 153 supplies current to the stepping motor 215 so that the first blade 212a and the second blade 212b are positioned at the open position when acceleration equal to or higher than a predetermined acceleration is detected. May be. That is, in the above description, in order to press the drive arm 213 against the stopper, the stepping motor 215 supplies a current that causes the first blade 212a and the second blade 212b to move further in the opening direction than the open position. Yes. However, since the stepping motor 215 can hold the first blade 212a and the second blade 212b in the open position without cooperation with the stopper, the camera controller 153 opens the first blade 212a and the second blade 212b. A current sufficient to be positioned may be supplied to the stepping motor 215. However, it does not exclude that the drive arm 213 contacts the stopper when the first blade 212a and the second blade 212b are held in the open position.
スナップアクション機構218は、1つの付勢バネ218aで、第1羽根212a及び第2羽根212bの開方向への付勢と閉方向への付勢とを実現しているが、この構成に限られるものではない。例えば、スナップアクション機構218は、第1羽根212a及び第2羽根212bを開方向へ付勢するバネと、第1羽根212a及び第2羽根212bを閉方向へ付勢するバネとの2つのバネを有していてもよい。
The snap action mechanism 218 uses one biasing spring 218a to realize the biasing in the opening direction and the biasing in the closing direction of the first blade 212a and the second blade 212b, but is limited to this configuration. It is not a thing. For example, the snap action mechanism 218 includes two springs: a spring that biases the first blade 212a and the second blade 212b in the opening direction and a spring that biases the first blade 212a and the second blade 212b in the closing direction. You may have.
アクチュエータは、ステッピングモータ215に限られるものではない。アクチュエータは、DCモータ等の別のモータであってもよい。ただし、ステッピングモータ215は、駆動アーム213を所望の位置に保持できるため、幕ユニット212をアクチュエータ単体で保持する(即ち、ストッパとの協働ではない)場合には、ステッピングモータ215が好ましい。
The actuator is not limited to the stepping motor 215. The actuator may be another motor such as a DC motor. However, since the stepping motor 215 can hold the drive arm 213 in a desired position, the stepping motor 215 is preferable when the curtain unit 212 is held as a single actuator (that is, not in cooperation with the stopper).
以上のように、本開示における技術の例示として、実施の形態を説明した。そのために、添付図面および詳細な説明を提供した。
As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.
したがって、添付図面および詳細な説明に記載された構成要素の中には、課題解決のために必須な構成要素だけでなく、上記技術を例示するために、課題解決のためには必須でない構成要素も含まれ得る。そのため、それらの必須ではない構成要素が添付図面や詳細な説明に記載されていることをもって、直ちに、それらの必須ではない構成要素が必須であるとの認定をするべきではない。
Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.
また、上述の実施の形態は、本開示における技術を例示するためのものであるから、特許請求の範囲またはその均等の範囲において種々の変更、置き換え、付加、省略などを行うことができる。
In addition, since the above-described embodiments are for illustrating the technique in the present disclosure, various modifications, replacements, additions, omissions, and the like can be made within the scope of the claims and the equivalents thereof.
本開示は、デジタルカメラ、ムービー、ミラーレス、などのメカシャッタを備える撮像装置に適用可能である。
The present disclosure can be applied to an imaging apparatus including a mechanical shutter such as a digital camera, a movie, or a mirrorless.
100 デジタルカメラ
101 交換レンズ
102 カメラボディ
110 フォーカスレンズ
111 フォーカスレンズ駆動部
112 ズームレンズ
113 ズームレンズ駆動部
114 フォーカスリング
115 ズームリング
116 絞り
117 絞り駆動部
120 レンズコントローラ
121 DRAM
122 フラッシュメモリ
130 レンズマウント
140 ボディマウント
150 CMOSイメージセンサ
151 タイミングジェネレータ
152 アナログフロントエンド
153 カメラコントローラ
154 電源
155 DRAM
156 フラッシュメモリ
157 メカシャッタ
158 加速度センサ
160 レリーズ釦
162 タッチパネル
163 液晶モニタ
164 メモリカード
165 カードスロット
170 カメラ側操作部
204 中央釦
205 十字釦 DESCRIPTION OFSYMBOLS 100 Digital camera 101 Interchangeable lens 102 Camera body 110 Focus lens 111 Focus lens drive part 112 Zoom lens 113 Zoom lens drive part 114 Focus ring 115 Zoom ring 116 Diaphragm 117 Diaphragm drive part 120 Lens controller 121 DRAM
122Flash memory 130 Lens mount 140 Body mount 150 CMOS image sensor 151 Timing generator 152 Analog front end 153 Camera controller 154 Power supply 155 DRAM
156Flash memory 157 Mechanical shutter 158 Acceleration sensor 160 Release button 162 Touch panel 163 LCD monitor 164 Memory card 165 Card slot 170 Camera side operation unit 204 Center button 205 Cross button
101 交換レンズ
102 カメラボディ
110 フォーカスレンズ
111 フォーカスレンズ駆動部
112 ズームレンズ
113 ズームレンズ駆動部
114 フォーカスリング
115 ズームリング
116 絞り
117 絞り駆動部
120 レンズコントローラ
121 DRAM
122 フラッシュメモリ
130 レンズマウント
140 ボディマウント
150 CMOSイメージセンサ
151 タイミングジェネレータ
152 アナログフロントエンド
153 カメラコントローラ
154 電源
155 DRAM
156 フラッシュメモリ
157 メカシャッタ
158 加速度センサ
160 レリーズ釦
162 タッチパネル
163 液晶モニタ
164 メモリカード
165 カードスロット
170 カメラ側操作部
204 中央釦
205 十字釦 DESCRIPTION OF
122
156
Claims (5)
- 開口部を有するカバーと、
前記カバーに保持され、前記開口部を遮蔽する閉位置と前記開口部を開く開位置との間を移動する幕機構と、
前記幕機構を駆動するアクチュエータと、
前記アクチュエータを制御する制御部と、
自装置の加速度を検知するセンサとを備え、
前記幕機構は、前記アクチュエータがオフとなっている待機状態においては、前記閉位置又は前記開位置に位置しており、
前記制御部は、前記待機状態において前記センサが所定値以上の加速度を検知したときに、前記アクチュエータをオンにして、前記幕機構を該待機状態に対応する前記閉位置又は前記開位置に保持する撮像装置。 A cover having an opening;
A curtain mechanism that is held by the cover and moves between a closed position that shields the opening and an open position that opens the opening;
An actuator for driving the curtain mechanism;
A control unit for controlling the actuator;
A sensor that detects the acceleration of the device itself,
The curtain mechanism is located at the closed position or the open position in a standby state in which the actuator is off,
The controller turns on the actuator to hold the curtain mechanism in the closed position or the open position corresponding to the standby state when the sensor detects an acceleration of a predetermined value or more in the standby state. Imaging device. - 請求項1に記載の撮像装置において、
前記幕機構を前記閉位置及び前記開位置のそれぞれに向けて付勢する付勢部をさらに備え、
前記幕機構は、前記待機状態において、前記付勢部の付勢力を受けた状態で該待機状態に対応する前記閉位置又は前記開位置に位置している撮像装置。 The imaging device according to claim 1,
An urging portion that urges the curtain mechanism toward each of the closed position and the open position;
In the standby state, the curtain mechanism is located at the closed position or the open position corresponding to the standby state in a state of receiving the biasing force of the biasing unit. - 請求項2に記載の撮像装置において、
前記付勢部は、前記幕機構の前記閉位置と前記開位置との間の移動範囲における、該開位置を含む所定の第1領域においては該幕機構を該開位置へ付勢する一方、該移動範囲における、該閉位置を含む所定の第2領域においては該幕機構を該閉位置へ付勢する撮像装置。 The imaging device according to claim 2,
The urging unit urges the curtain mechanism to the open position in a predetermined first region including the open position in a movement range between the closed position and the open position of the curtain mechanism. An imaging apparatus that urges the curtain mechanism to the closed position in a predetermined second area including the closed position in the movement range. - 請求項3に記載の撮像装置において、
前記付勢部は、前記移動範囲において、前記第1領域と前記第2領域との間の第3領域を境に前記幕機構を付勢する方向が切り替わる撮像装置。 The imaging device according to claim 3.
The urging unit is an imaging apparatus in which a direction in which the curtain mechanism is urged is switched with a third region between the first region and the second region as a boundary in the movement range. - 開口部を有するカバーと、
前記カバーに保持され、前記開口部を遮蔽する閉位置と前記開口部を開く開位置との間を移動する幕機構と、
前記幕機構を駆動するアクチュエータと、
前記幕機構の移動を規制するロック機構と、
前記アクチュエータ及び前記ロック機構を制御する制御部とを備え、
前記制御部は、前記アクチュエータがオフとなる待機状態に移行するときに、前記ロック機構を作動させて、前記幕機構の移動を規制する撮像装置。 A cover having an opening;
A curtain mechanism that is held by the cover and moves between a closed position that shields the opening and an open position that opens the opening;
An actuator for driving the curtain mechanism;
A lock mechanism for restricting movement of the curtain mechanism;
A controller for controlling the actuator and the lock mechanism,
The control unit operates the lock mechanism to restrict the movement of the curtain mechanism when shifting to a standby state in which the actuator is turned off.
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CN113945844A (en) * | 2020-07-17 | 2022-01-18 | 深圳绿米联创科技有限公司 | Method for detecting slippage of curtain motor, curtain motor and curtain |
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JP2004177626A (en) * | 2002-11-27 | 2004-06-24 | Nidec Copal Corp | Shutter for camera |
WO2010029689A1 (en) * | 2008-09-10 | 2010-03-18 | パナソニック株式会社 | Camera body and imaging device |
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JP2004177626A (en) * | 2002-11-27 | 2004-06-24 | Nidec Copal Corp | Shutter for camera |
WO2010029689A1 (en) * | 2008-09-10 | 2010-03-18 | パナソニック株式会社 | Camera body and imaging device |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN113945844A (en) * | 2020-07-17 | 2022-01-18 | 深圳绿米联创科技有限公司 | Method for detecting slippage of curtain motor, curtain motor and curtain |
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