Blade opening and closing devices and imaging devices

Abstract

A blade opening and closing device includes: a drive body including a rotor; a drive rod rotatable in a first rotation direction from a first rotational position to a second rotational position and in a second rotational direction from the second rotational position to the first rotational position; an opening and closing blade operated in a closing direction of a closed opening as the drive rod rotates in the first rotational direction, and operated in an opening direction of an open opening as the drive rod rotates in the second rotational direction; and a blade return spring biasing the opening and closing blade in the opening direction and biasing the drive rod in the second rotational direction, wherein the drive rod is rotatable independently of the rotational operation of the rotor, the drive rod rotates integrally with the rotor in the first rotational direction by the driving force of the drive body, and the drive rod rotates independently of the rotor in the second rotational direction at least by the biasing force of the blade return spring.

Description

Technical Field

[0001] This technology relates to the field of blade opening and closing devices having opening and closing blades for opening and closing openings through which light can be transmitted, and to imaging devices including the blade opening and closing devices. Background Technology

[0002] In various imaging devices such as video cameras and still cameras, an imaging element is provided that performs photoelectric conversion on light captured by an optical system including lens groups and optical elements. In such imaging devices, for example, when imaging a subject, light is controlled by a focal plane shutter that acts as a blade opening and closing device and is incident on the imaging element.

[0003] In some blade opening and closing devices, a base with an opening is provided, an opening and closing blade that moves (travels) relative to the base, and a drive rod that applies a driving force to the opening and closing blade. The opening and closing operation of the opening and closing blade is performed by rotating the drive rod (see, for example, Patent Document 1).

[0004] The drive rod rotates between a first rotational position (initial position) and a second rotational position. With the drive rod held in the first rotational position, the opening and closing blades are, for example, in the open position for opening the opening, and with the drive rod held in the second rotational position, the opening and closing blades are, for example, in the closed position for closing the opening. Since light passes through the opening and is incident on the imaging element, in order to advantageously perform light incident control, it is necessary to properly perform the opening and closing operations of the opening and closing blades, and it is also necessary to properly hold the drive rod in the first and second rotational positions.

[0005] In the blade opening and closing device described in Patent Document 1, the positioning torque generated in the rotor of the drive body is transmitted to the drive rod, and a portion of the drive rod is pressed onto a predetermined part by the transmitted positioning torque, thereby holding the drive rod in a first rotational position.

[0006] Citation List

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2012-189641 Summary of the Invention

[0009] The problem to be solved by the present invention

[0010] Meanwhile, in the blade opening and closing device described in Patent Document 1, the drive rod is held in a first rotational position by a positioning torque generated in the rotor of the drive body. However, when the drive rod rotates from the first rotational position to a second rotational position and the opening and closing blades move toward the closed position, it is necessary to generate a driving force in the drive body that exceeds the magnitude of the positioning torque to rotate the drive rod toward the second rotational position.

[0011] Therefore, due to the large driving force generated in the actuator, it is possible that the power consumption will increase or the actuator will become larger.

[0012] Therefore, one objective of this technology for blade opening and closing devices and imaging devices is to reduce power consumption and miniaturize the drive unit.

[0013] Solutions to the problem

[0014] First, the blade opening and closing device according to the present technology includes: a drive body including a rotor; a drive rod rotatable in a first rotation direction from a first rotation position to a second rotation position and in a second rotation direction from the second rotation position to the first rotation position; an opening and closing blade, which is operated in a closing direction to close the opening as the drive rod rotates in the first rotation direction, and in an opening direction to open the opening as the drive rod rotates in the second rotation direction; and a blade return spring, which biases the opening and closing blade in the opening direction and biases the drive rod in the second rotation direction, wherein the drive rod is rotatable independently of the rotation operation of the rotor, the drive rod rotates integrally with the rotor in the first rotation direction by the driving force of the drive body, and the drive rod rotates independently of the rotor in the second rotation direction at least by the biasing force of the blade return spring.

[0015] Therefore, the rotation of the drive rod in the first rotation direction is performed together with the rotor, the rotation of the drive rod in the second rotation direction is performed separately from the rotor, and the drive rod is held in the second rotation position by the bias force of the blade return spring.

[0016] Second, in the aforementioned blade opening and closing device, it is preferable that when the drive body is not energized, the drive rod can rotate independently of the rotor in the first rotation direction.

[0017] Therefore, when the drive rod rotates in the first rotation direction due to an impact while the rotor is not rotating, the drive rod rotates in the second rotation direction by a driving force different from the driving force of the rotor and is held in the first rotation position.

[0018] Third, in the aforementioned blade opening and closing device, it is preferable that the rotor's center of gravity is located on the rotating shaft.

[0019] Therefore, this makes it difficult for the rotor to rotate when an impact occurs.

[0020] Fourth, in the above-mentioned blade opening and closing device, it is preferable that the rotation shaft of the rotor and the rotation shaft of the drive rod are the same.

[0021] Therefore, the rotation of the rotor and the rotation of the drive rod occur around the same fulcrum.

[0022] Fifth, in the above-mentioned blade opening and closing device, preferably, the rotor is provided with a pressing part, the drive rod is provided with a pressed part that is pressed by the pressing part, and when the pressed part is pressed by the pressing part, the drive rod is rotated in the first rotation direction by the driving force of the drive body.

[0023] Therefore, the driving force of the driving body is transmitted from the pressing part to the pressed part, and the driving rod rotates.

[0024] Sixth, in the above-mentioned blade opening and closing device, it is preferable to provide a brake lever that can be operated between the deceleration start position and the rotation stop position, wherein when the brake lever is operated from the deceleration start position toward the rotation stop position, the rotation speed of the drive lever decreases when rotating in the first rotation direction.

[0025] Therefore, when rotating in the first rotation direction, the rotational speed of the drive rod is reduced by the brake rod.

[0026] Seventh, in the above-mentioned blade opening and closing device, preferably, a rod support portion is formed on the brake rod, and the drive rod that rotates in the first rotation direction is supported by the rod support portion.

[0027] Therefore, since the rotational speed of the drive rod is reduced by the brake rod and the drive rod is supported by the brake rod, it is not necessary to separately install components to reduce the rotational speed of the drive rod and components to support the drive rod.

[0028] Eighth, in the above-mentioned blade opening and closing device, it is preferable to provide a brake stop member that presses the brake lever and stops the brake lever at the rotation stop position, and the brake lever is stopped at the rotation stop position by the brake stop member, and the drive rod is held at the second rotation position.

[0029] Therefore, when the brake lever is stopped in the rotation stop position by the brake stop member, the drive lever supported by the lever support remains in the second rotation position.

[0030] Ninth, in the above-mentioned blade opening and closing device, preferably, the rotor is provided with an actuating part and the brake lever is provided with an operated part. By pressing the operated part with the actuating part, the brake lever is operated from the rotation stop position to the deceleration start position. As the brake lever is operated from the rotation stop position to the deceleration start position, the support state of the lever support part on the drive lever is released.

[0031] Therefore, the operating part is pressed by the rotor's actuating part, and the brake lever is operated from the rotation stop position to the deceleration start position, so that the support state of the brake lever relative to the drive lever is released.

[0032] Tenth, in the aforementioned blade opening and closing device, it is desirable that when the drive rod is pressed by the operated part, the support state of the rod support part on the drive rod is released.

[0033] Therefore, the operated part has the function of operating the brake lever from the rotation stop position to the deceleration start position by the driving force of the rotor, and the function of pressing the drive lever to release the support state of the lever support part on the drive lever.

[0034] Eleventh, in the above-mentioned blade opening and closing device, it is preferable that the drive rod is provided with a deceleration function, which contacts a part of the brake rod when rotating in the second rotation direction, and the drive rod decelerates between the first rotation position and the second rotation position through the contact between the deceleration function and the part of the brake rod.

[0035] Therefore, since the drive rod decelerates during rotation in the second rotation direction, the drive rod stops at the first rotation position in the decelerated state.

[0036] Twelfth, in the aforementioned blade opening and closing device, it is desirable for the deceleration function unit to come into contact with the operated unit.

[0037] Therefore, the components for slowing down the rotor and the components for slowing down the drive rod are shared, and there is no need to provide a dedicated component for slowing down the drive rod except for the brake rod.

[0038] Thirteenth, in the above-mentioned blade opening and closing device, it is desirable to provide a support base on which a drive rod is rotatably supported. The drive rod is provided with a connecting shaft, and the opening and closing blades are connected to the connecting shaft. A position holding part is formed in the support base to hold the drive rod at the first rotation position. The drive rod is held at the first rotation position by pressing the connecting shaft against the position holding part using the biasing force of the blade return spring.

[0039] Therefore, since the connecting shaft connected to the opening and closing blades is pressed against the position holding part, and the drive rod is held in the first rotation position, it is not necessary to separately provide the part that connects the opening and closing blades to the drive rod and the part that holds the opening and closing blades in the first rotation position.

[0040] Fourteenth, in the above-mentioned blade opening and closing device, it is preferable to provide a biasing spring, which is supported between the rotor and the drive rod, and biases the drive rod in the second rotation direction.

[0041] Therefore, the biasing spring that biases the drive rod in the second rotation direction is supported between the rotor and the drive rod, and the drive rod rotates integrally with the rotor in the first rotation direction, so that when the drive rod rotates in the first rotation direction, the biasing force of the biasing spring will not become a load on the driving force of the drive body.

[0042] Fifteenth, in the aforementioned blade opening and closing device, it is desirable that a portion of the rotor and a drive rod be positioned opposite each other in the direction of the rotor's rotation axis, and that a biasing spring is placed between the opposing portions of the rotor and the drive rod.

[0043] Therefore, the bias spring is located between the rotor and the drive rod in the direction of the rotor's rotation axis.

[0044] The imaging device according to this technology includes: a blade opening and closing device for controlling light captured by an optical system; and an imaging element for photoelectric conversion of light captured by the optical system, wherein the blade opening and closing device includes: a drive body including a rotor; a drive rod rotatable along a first rotation direction from a first rotation position to a second rotation position and a second rotation direction from the second rotation position to the first rotation position; an opening and closing blade operated in a closing direction of the opening as the drive rod rotates in the first rotation direction, and operated in an opening direction of the opening as the drive rod rotates in the second rotation direction; a blade return spring biasing the opening and closing blade in the opening direction and biasing the drive rod in the second rotation direction, the drive rod being rotatable independently of the rotation operation of the rotor, the drive rod rotating integrally with the rotor in the first rotation direction by the driving force of the drive body, and the drive rod rotating independently of the rotor in the second rotation direction at least by the biasing force of the blade return spring.

[0045] Therefore, in the blade opening and closing device, the rotation of the drive rod in the first rotation direction is performed together with the rotor, the rotation of the drive rod in the second rotation direction is performed separately from the rotor, and the drive rod is held in the second rotation position by the bias force of the blade return spring.

[0046] In the above-mentioned imaging device, preferably, the blade opening and closing device includes a drive block containing a drive body and a mechanism block containing opening and closing blades. In the direction of movement of opening and closing blades, the size of the drive block is smaller than the size of the mechanism block. The drive block is located on the outer periphery of the mechanism block, and the terminal portion is disposed on the opposite side of the drive block on the outer periphery of the mechanism block in the direction of movement of opening and closing blades.

[0047] Therefore, the terminal portion is placed in the space on the outer periphery of the mechanism block. Attached Figure Description

[0048] Figure 1 and Figures 2 to 26 An embodiment of the blade opening and closing device and the imaging device of the present technology is shown together, and it is a perspective view of the imaging device.

[0049] Figure 2 It shows from and Figure 1 Perspective views of an imaging device viewed from different directions.

[0050] Figure 3 This is a schematic side view of the imaging device.

[0051] Figure 4 This is a perspective view of the blade opening and closing device.

[0052] Figure 5 It is an exploded perspective view of the blade opening and closing device.

[0053] Figure 6 This is an exploded perspective view showing the drive mechanism, etc.

[0054] Figure 7 It is a front view showing the state of the blades being open and closed while remaining in the open position.

[0055] Figure 8 It is a front view showing the state of the blades being open and closed while remaining in the closed position.

[0056] Figure 9 It is an exploded perspective view of the rotor, bias spring, and drive rod.

[0057] Figure 10 This is a rear view of the rotor, bias spring, and drive rod.

[0058] Figure 11 and Figures 12 to 16 Together, the operation of opening and closing the blades of the device is shown, and it is a rear view showing the initial state.

[0059] Figure 12 This is a rear view showing the state immediately following the start of the closing operation of opening and closing the blades.

[0060] Figure 13 It is shown in Figure 12 The following is a rear view showing the state after the blades are opened and closed, the drive rod's connecting shaft is in contact with the brake rod, and the drive rod is held in the second rotation position.

[0061] Figure 14 This is a rear view showing the state immediately following the opening operation of starting and closing the blades.

[0062] Figure 15 It is shown in Figure 14 The rear view shows the state after the blades are opened and closed, and the drive lever is separated from the brake lever.

[0063] Figure 16 This is a rear view showing the state in which the connecting shaft is pressed against the position holding part and the drive rod is held in the first rotation position.

[0064] Figure 17 and Figure 18 Together, it shows the operation of the blade opening and closing the device when an impact occurs while the device is not powered on, and is a rear view showing the state in which the drive rod rotates toward the second rotation position.

[0065] Figure 18 This is a rear view showing the state in which the drive rod, which is rotating toward the second rotation position, is rotated to the first rotation position by a biasing force such as a biasing spring.

[0066] Figure 19 It shows the use of having with Figures 20 to 23 The example shows the operation of the blades opening and closing the device using a drive rod with different constructions, and is a rear view showing the initial state.

[0067] Figure 20 It is shown that in Figure 19 The following is a rear view showing the state after the blades are closed by opening and closing, the drive rod's connecting shaft is in contact with the brake rod, and the drive rod is held in the second rotation position.

[0068] Figure 21 This is a rear view showing the state immediately following the opening operation of starting and closing the blades.

[0069] Figure 22 It is shown in Figure 21 The rear view shows the state after the blades are opened and closed, and the drive lever is separated from the brake lever.

[0070] Figure 23 This is a rear view showing the rotor stopped rotating.

[0071] Figure 24 This is a rear view showing the connecting shaft being pressed against the position holding part and the drive rod being held in the first rotational position.

[0072] Figure 25 This is a rear view showing the positional relationship between the drive block and the mechanism block.

[0073] Figure 26 This is a block diagram of an imaging device. Detailed Implementation

[0074] In the following description, the modes for performing this technology will be described with reference to the accompanying drawings.

[0075] In the embodiments described below, the imaging device of the present technology is applied to a still camera, and the blade opening and closing device of the present technology is applied to a focal plane shutter set in the still camera.

[0076] Note that the application scope of this technology is not limited to still cameras and focal plane shutters set in still cameras, but can be widely applied to various imaging devices, such as those incorporated into cameras and other devices, as well as various blade opening and closing devices such as apertures set in these imaging devices.

[0077] In the following description, it is assumed that the front, back, up, down, left, and right directions are indicated as the directions seen from the photographer when imaging with a still camera. Therefore, the subject side is the front, and the photographer side is the back.

[0078] Note that the directions described below—front, back, up, down, left, and right—are for ease of description, and the implementation of this technology is not limited to these directions.

[0079] In addition to optical elements configured with one or more lenses, the lens group described below may also include other optical elements, such as one or more lenses and apertures.

[0080] <Illustrative Configuration of Imaging Equipment>

[0081] First, a schematic configuration of the imaging device will be described (see...). Figures 1 to 3 ).

[0082] Imaging device 1 includes, for example, a flat housing 2 arranged in a horizontally elongated manner (see...). Figure 1 and 2 The required units inside and outside the ( ). For example Figure 1 As shown, the imaging device 1 can be a device capable of attaching and detaching interchangeable lenses 200.

[0083] The flash unit 3 is located on the front surface of housing 2. The shutter button 4, zoom switch 5, and power button 6 are located on the upper surface of housing 2 (see...). Figure 1 and2 A display 7, various operation units 8, 8... and a viewfinder 9 are provided on the rear surface of the housing 2.

[0084] like Figure 3 As shown, in the housing 2, from the front side, there are arranged an optical system 10 including a lens group, optical elements, etc., a blade opening and closing device (focal plane shutter) 11 that controls the amount of light taken in by the optical system 10, and an imaging element 12 that performs photoelectric conversion on the light taken in by the blade opening and closing device 11.

[0085] <Configuration of the blade opening and closing device>

[0086] The configuration of the blade opening and closing device 11 will be described below (see Figures 4 to 10 ).

[0087] The blade opening and closing device 11 includes a base 13, a pressing plate 14, opening and closing blades 15, connecting rods 16, 17, and a drive mechanism 17, and is mounted on the front surface side of the imaging element 12 (see [link]). Figures 4 to 6 ).

[0088] The base 13 is formed in a generally rectangular shape, for example, elongated in the horizontal direction, and has a rectangular opening 13a extending through the front-to-back direction (see...). Figure 4 and 5 The opening 13a is slightly larger than the effective incident area of ​​light on the imaging surface of the imaging element 12, which is the area on the imaging surface where light is captured by the optical system 10 and is necessary for generating an image.

[0089] The portion of the substrate 13 below the opening 13A is configured as a retaining portion 18, which serves as a retaining area for holding the opening and closing blade 15 in the open position. The portion of the substrate 13 on one side of the opening 13A is configured as an attachment portion 19. An imaging element 12 is disposed on the rear side of the substrate 13.

[0090] Forwardly protruding pin insertion holes 19a, 19a are formed at the side ends of the attachment portion 19 so that they are perpendicular to each other. A shaft movement hole 19b is formed in the attachment portion 19, which is generally arc-shaped. The attachment portion 19 is provided with a spring hook protrusion 19c that protrudes forward on the pin insertion holes 19a, 19a.

[0091] The pressing plate 14 is formed to be substantially the same size and shape as the base 13 and has a through hole 14a. The pressing plate 14 is attached to the base 13 from the front, and the opening and closing blade 15 is inserted between the pressing plate and the base 13. With the pressing plate 14 attached to the base 13, the opening 13a is positioned immediately behind the through hole 14a.

[0092] A gap hole 14b is formed in the pressing plate 14, and the gap hole 14b is formed in an arc shape. When the pressing plate 14 is attached to the base 13, the gap hole 14b is located in front of the shaft moving hole 19b.

[0093] The opening and closing of the blade 15 includes multiple plate-like segments 15a, 15a… (see…) Figure 5 In the blade opening and closing device 11 used as a focal plane shutter, for example, the so-called electronic front curtain shutter consists of an electronic curtain that acts as the front curtain by controlling the imaging element 12 and an opening and closing blade 15 configured as a mechanical structure and acting as the rear curtain.

[0094] Sections 15a, 15a… are horizontally elongated, for example, four sections are provided. In opening and closing the blade 15, at least a portion of sections 15a, 15a… overlaps each other in the thickness direction. The sections 15a, 15a… are pivotally coupled to two links 16, 16, respectively.

[0095] Links 16 and 16 are formed in a plate shape and function as parallel links. Support holes 16a and 16a are formed at one end of the longitudinal direction of links 16 and 16, respectively. One link 16 has a long connecting hole 16b formed at one end near the longitudinal direction. A spring hook hole 16c is formed in the other link 16.

[0096] The support pins described herein are then inserted into the support holes 16a and 16a of the connecting rods 16, 16, respectively, and the connecting rods 16, 16 rotate about the support pins. The connecting rods 16, 16 rotate relative to the base 13 and the pressing plate 14 while remaining parallel.

[0097] When connecting rods 16, 16 rotate, segments 15a, 15a... move (travel) in a substantially vertical direction. At this time, the amount of movement of segments 15a, 15a... is different, and the overlapping area changes, thus affecting the opening position of the opening 13a of the base 13 (refer to...). Figure 7 ) and the closed position of closing opening 13a (refer to Figure 8 You can open / close the device between these two states.

[0098] The direction of movement of the open and close blade 15 from the open position to the closed position is the closing direction, and the direction of movement of the open and close blade 15 from the closed position to the open position is the opening direction.

[0099] When the blade 15 is moved to open and close as described above, the overlapping area of ​​segments 15a, 15a... changes with the moving position, and this area is the smallest at the open position.

[0100] Therefore, since the arrangement space of the opening and closing blades 15 is reduced in the open position and the area of ​​the opening and closing blades 15 is maximized in the closed position, the blade opening and closing device 11 can reduce its size in the moving direction of the opening and closing blades 15 and can form an opening 13a with a sufficient size.

[0101] Note that plates (not shown) with light-transmitting holes positioned corresponding to the opening 13a are placed between the front surface of the opening and closing blade 15 and the base 13, and between the rear surface of the opening and closing blade 15 and the pressing plate 14, and these plates facilitate the operation of the opening and closing blade 15.

[0102] The drive mechanism 17 is configured by arranging the necessary units on the support base 20 (see...). Figure 5 and 6 ).

[0103] The support base 20 is formed as a vertical elongated plate facing the front-to-back direction. A generally arc-shaped shaft operating hole 21 is formed near the lower end of the support base 20. One end edge of the shaft operating hole 21 in the longitudinal direction is formed as a position holding part 21A.

[0104] Forwardly protruding support pins 20a, 20a are provided on the support base 20 so that they are perpendicularly separated from each other. A rearwardly protruding receiving protrusion 20b is provided on the outer periphery of the support base 20.

[0105] Support pins 20a and 20a are inserted from the rear into pin insertion holes 19a and 19a of the base 13, respectively, and also from the rear into support holes 16a and 16a of the connecting rods 16 and 16. Therefore, the connecting rods 16 and 16 rotate relative to the base 13 and the pressing plate 14 with the support pins 20a and 20a as fulcrums.

[0106] The support base 20 is attached to the attachment portion 19 of the base 13 from the rear. With the support base 20 attached to the attachment portion 19, the shaft operating hole 21 is positioned immediately behind the shaft moving hole 19b.

[0107] With the support base 20 attached to the attachment part 19, the leaf return spring 22 is supported by a support pin 20a (see reference). Figure 7 , Figure 8 The leaf spring 22 is, for example, a torsion coil spring, and includes an annular helical portion 22a and arms 22b, 22b protruding from the helical portion 22a.

[0108] In the leaf spring 22, the helical portion 22a is supported by the support pin 20a, one arm 22b is supported by the spring hook protrusion 19c of the base 13, and the other arm 22b is inserted into and supported in the spring hook hole 16c of the connecting rod 16. Therefore, by applying a force in one rotational direction to one connecting rod 16 through the leaf spring 22, the force of the leaf spring 22 is transmitted from one connecting rod 16 to the opening and closing leaf 15, and a force is applied to the opening and closing leaf 15 in the opening direction through the leaf spring 22.

[0109] The rotor shaft 23 is attached to the support base 20. The rotor shaft 23 protrudes rearward from the support base 20. A brake support portion 24 is provided on the rear side of the support base 20. A rearwardly protruding brake stop member 25 is attached to the rear side of the support base 20. The brake support portion 24 and the brake stop member 25 are located around the shaft operating hole 21.

[0110] The drive mechanism 17 includes: a cover plate 26 attached to the support base 20; a drive body 27 partially attached to the cover plate 26; a drive rod 28 rotatable relative to the support base 20; and a biasing spring 29 biasing the drive rod 28 (see...). Figures 4 to 6 ).

[0111] The cover plate 26 includes a cover surface 26a facing the front-rear direction, and attachment protrusions 26b, 26b... protruding forward from the outer periphery of the cover surface 26a. The distal ends of the attachment protrusions 26b, 26b... are attached to the support base 20 by means of threaded connection or the like.

[0112] The drive unit 27 includes a yoke 30, a coil 31, and a rotor 32.

[0113] The yoke 30 is formed in a ring shape and is attached from the front to the cover portion 26a of the cover plate 26, and is located inside the attached protrusions 26b, 26b... The coil 31 is attached in a state of being wound around a part of the yoke.

[0114] Rotor 32 includes a rotor base 33 containing resin material and a rotor magnet 34 attached to the rotor base 33 (see reference). Figure 9 , Figure 10 The center of gravity of rotor 32 is located on or near the rotating shaft.

[0115] The rotor base 33 has an annular base portion 35 and a cylindrical portion 36 that protrudes rearward from the center of the base portion 35. The rotor magnet 34 is formed into a cylindrical shape and is attached to the rotor base 33 with the cylindrical portion 36 inserted into the center portion and one end face in the axial direction in contact with the base portion 35.

[0116] On the outer periphery of the base portion 35, a pressing portion 37, a pressing portion 38, an actuating portion 39, and a spring support portion 40 are sequentially and separately arranged in the circumferential direction, protruding toward the opposite side of the cylindrical portion 36.

[0117] The drive rod 28 includes a plate-shaped actuating base 41 formed in a predetermined shape and a connecting shaft 42 protruding forward from one end of the actuating base 41. The actuating base 41 has an annular pivot portion 41a and an arm portion 41b protruding from the pivot portion 41a, and the connecting shaft 42 protrudes from the distal end of the arm portion 41b. The actuating base 41 is provided with a pressing portion 41c protruding from the continuous portion of the pivot portion 41a and the arm portion 41b, and the pressing portion 41c protrudes from the pivot portion 41a in a direction different from the protruding direction of the arm portion 41b.

[0118] A rotor shaft 23 is inserted into the rotation fulcrum portion 41a of the drive rod 28, and the drive rod is rotatably supported by the support base 20 with the rotor shaft 23 as the fulcrum.

[0119] With the drive rod 28 supported by the support base 20, the connecting shaft 42 of the drive rod 28 is inserted into the shaft operation hole 21 of the support base 20 and the shaft movement hole 19b of the base 13, and also into the gap hole 14b of the pressing plate 14. The connecting shaft 42 is inserted into the connecting hole 16b of a connecting rod 16 formed between the shaft movement hole 19b and the gap hole 14b (see...). Figure 5 Therefore, when the drive rod 28 rotates, the connecting shaft 42 moves, the connecting rods 16, 16 rotate while maintaining a parallel state, and the segments 15a, 15a... move in a substantially perpendicular direction as the drive rod 28 rotates.

[0120] Furthermore, in rotor 32, rotor shaft 23 is inserted into the portion extending from base portion 35 to cylinder portion 36, and rotor shaft 23 is able to rotate relative to support base 20, which serves as a fulcrum (see...). Figure 6 ).

[0121] As described above, the drive rod 28 can rotate around the rotor shaft 23, which serves as a fulcrum, and the rotor 32 can rotate around the rotor shaft 23, which serves as a fulcrum, and the rotation axis of the rotor 32 is the same as the rotation axis of the drive rod 28.

[0122] Therefore, since the rotation of rotor 32 and the rotation of drive rod 28 are around the same fulcrum, the blade opening and closing device 11 can be miniaturized.

[0123] The bias spring 29 is, for example, a torsion coil spring, and includes an annular helical portion 29a and arms 29b, 29b protruding from the helical portion 29a (see...). Figure 6 , 9 and 10).

[0124] In the bias spring 29, the helical portion 29a is supported by the rotor shaft 23, one arm 29b is supported by the spring support portion 40 of the rotor base 33 in the rotor 32, and the other arm 29b is supported by the pressed portion 41c of the actuating base 41 in the drive rod 28. Therefore, a biasing force is applied to the rotor 32 and the drive rod 28 in opposite directions, in a direction in which the pressing portion 38 and the pressed portion 41c approach each other.

[0125] In the blade opening and closing device 11, the rotor 32 and the rotation fulcrum 41a of the drive rod 28 are positioned facing each other in the direction of the rotor 32's rotation axis, and the bias spring 29 is positioned between the rotor 32 and the rotation fulcrum 41a positioned facing each other (see...). Figure 10 ).

[0126] As described above, in the blade opening and closing device 11, the rotor 32 and a portion of the drive rod 28 are positioned facing each other in the direction of the rotation axis of the rotor 32, and a bias spring 29 is disposed between the rotor 32 and the portion of the drive rod 28 positioned facing each other.

[0127] Therefore, since the bias spring 29 is located between the rotor 32 and the drive rod 28 in the direction of the rotation axis of the rotor 32, the bias spring 29 does not protrude outward from the rotor 32 in the radial direction of the rotor 32, and the blade opening and closing device 11 can be miniaturized.

[0128] In the drive unit 27 configured as described above, when current is supplied to the coil 31, the rotor 32 rotates in a direction corresponding to the direction of the current.

[0129] Furthermore, the drive rod 28 rotates between a first rotational position and a second rotational position. The first rotational position is the end of the drive rod 28 rotating in the direction of the biasing force of the biasing spring 29, and the second rotational position is the end of the drive rod 28 rotating in the direction of the biasing force of the biasing spring 29. The direction of rotation of the drive rod 28 from the first rotational position to the second rotational position is the first rotational direction, and the direction of rotation of the drive rod 28 from the second rotational position to the first rotational position is the second rotational direction.

[0130] The drive mechanism 17 is equipped with a brake lever 43 (see...) Figure 6 The brake lever 43 is formed in a generally V-shape and is able to rotate around the brake support 24 supporting the base 20. The brake lever 43 rotates between a deceleration start position where the drive lever 28 begins to decelerate and a rotation stop position where rotation stops.

[0131] The brake lever 43 has a V-shaped bend as a supported plate portion 44, which is supported by the brake support portion 24. In the brake lever 43, the portion extending from the supported plate portion 44 to one side is configured as a brake arm 45, and the portion extending from the supported plate portion 44 to the other side is configured as an actuating arm 46.

[0132] A recess is formed at the side edge of the supported plate portion 44, which is a rod support portion 44a. The distal end of the brake arm 45 is provided with a rearwardly protruding operated portion 45a. The brake arm 45 has a rearwardly protruding stop portion 45b on its outer periphery.

[0133] The brake lever 43 is supported on the brake support portion 24 by the support member 48 via the pressure spring 47. Therefore, the brake lever 43 is supported under a constant load applied to the support base 20 by the pressure spring 47, and rotates relative to the support base 20 when a rotational force greater than the frictional force between the pressure spring 47 and the support base 20 is applied.

[0134] <Operation of the blade opening and closing device>

[0135] The operation of the blade opening and closing device 11 will be described below (see Figure 7 , 8 and 11 to 16).

[0136] First, the initial state of each unit in the drive mechanism 17 will be described (see...). Figure 7 and 11 ).

[0137] In the initial state before operating the power button 6 of the imaging device 1, the coil 31 is not energized, no driving force is generated in the drive body 27, and the rotation of the rotor 32 is stopped (see...). Figure 11 At this time, the rotor magnet 34 is attracted to the yoke 30 by magnetic force, the rotor 32 is held at a predetermined rotation position by positioning torque, and the receiving protrusion 20b of the support base 20 is pressed by the pressing part 37.

[0138] In the initial state, the drive rod 28 is biased in the second rotation direction by the biasing force of the biasing spring 29, and the connecting shaft 42 presses against the position holding portion 21a of the shaft operating hole 21 formed in the support base 20 and is held in the first rotation position. At this time, the pressing portion 38 of the rotor 32 is in contact with or close to the pressed portion 41c of the drive rod 28, and then the biasing force of the blade return spring 22 in the second rotation direction is applied to the drive rod 28 via the connecting rods 16, 16 and the opening and closing blades 15, and the connecting shaft 42 presses against the position holding portion 21a of the shaft operating hole 21 by the biasing force of the blade return spring 22 and is held in the first rotation position.

[0139] Note that in the blade opening and closing device 11, only the blade return spring 22 of the blade return spring 22 and the bias spring 29 may be provided. In this case, the drive rod 28 is held in the first rotational position by pressing the connecting shaft 42 against the position holding part 21a by the bias force of the blade return spring 22.

[0140] Furthermore, in the blade opening and closing device 11, for example, the spring force of the blade return spring 22 is less than the spring force of the bias spring 29.

[0141] In the initial state, the opening and closing blades 15 are biased in the opening direction by the blade return spring 22 and are held in the open position (see...). Figure 7 ).

[0142] At this time, the imaging element 12 is in the off state (non-exposure state), and no light is incident through the electronic curtain (front curtain).

[0143] In the initial state, brake lever 43 remains in the deceleration start position, and brake arm 45 is separated from the connecting shaft 42 of drive lever 28 (see...). Figure 11 At this time, in the brake lever 43, the operating part 39 of the rotor 32 is in contact with the operated part 45a, the stopping part 45b is separated from the brake stopping part 25, and the operating arm 46 is held in a position that does not overlap with the shaft operating hole 21.

[0144] In the initial state described above, when coil 31 is energized, the opening and closing operation of blade 15 begins (see...). Figure 12 At this point, the control of the electronic curtain begins before the opening and closing operations of the blades 15.

[0145] When coil 31 is energized, rotor 32 begins to rotate to one side, and the opening and closing blades 15 operate from the open position to the closed position in the closing direction. When the opening and closing blades 15 are operated from the open position to the closed position, with a slit formed between the electronic curtain and the opening and closing blades 15, the electronic curtain is controlled according to the operating speed of the opening and closing blades 15, and light is incident on the imaging element 12 through the formed slit to perform exposure.

[0146] When the rotor 32 begins to rotate to one side, the pressed portion 41c of the drive rod 28 is pressed by the pressed portion 38 of the rotor 32, and the drive rod 28 rotates from the first rotation position to the second rotation position along the first rotation direction. The drive rod 28 rotates by being pressed by the pressed portion 38 of the rotor 32, thus rotating integrally with the rotor 32. Therefore, when the drive rod 28 rotates along the first rotation direction, the bias spring 29 also rotates together with the rotor 32 and the drive rod 28. The biasing force of the bias spring 29 does not become a load on the rotor 32, and the rotor 32 rotates at high speed toward the second rotation position by the driving force of the drive body 27.

[0147] At this time, as the rotor 32 rotates, the actuating part 39 separates from the operated part 45a of the brake lever 43.

[0148] As described above, in the blade opening and closing device 11, the pressing part 38 is provided in the rotor 32, and the pressed part 41c pressed by the pressing part 38 is provided in the drive rod 28. The pressing part 38 presses the pressed part 41c, thereby causing the drive rod 28 to rotate in the first rotation direction by the driving force of the drive body 27.

[0149] Therefore, since the driving force of the driving body 27 is transmitted from the pressing part 38 to the pressed part 41c and the driving rod 28 rotates, the driving rod 28 can be reliably rotated with a simple structure.

[0150] As the drive rod 28 rotates, the opening and closing blade 15 operates at high speed in the closing direction from the open position to the closed position.

[0151] Subsequently, coil 31 is energized, rotor 32 then rotates to one side, and drive rod 28 rotates further toward a second rotational position, thereby further moving toward the closed position to operate the opening and closing of blade 15 (see...). Figure 8 , 11 and 13).

[0152] As the drive lever 28 rotates further to the second rotational position, the connecting shaft 42 contacts the brake arm 45 of the brake lever 43, which is held at the deceleration start position, and the brake lever 43 is pressed by the connecting shaft 42 and rotates from the deceleration start position to the rotation stop position against the frictional force relative to the support base 20 (see...). Figure 13 Therefore, the rotational speed of the drive lever 28 gradually decreases as it approaches the second rotational position via the brake lever 43, and the operating speed of opening and closing the blade 15 also gradually decreases as it approaches the closed position.

[0153] At this time, the connecting shaft 42 of the drive rod 28 is inserted into the rod support part 44a of the brake rod 43, supported by the brake rod 43, and rotates integrally with the brake rod 43 to the second rotation position.

[0154] When the stop portion 45b of the brake arm 45 contacts the brake stop member 25 attached to the support base 20, the rotation of the brake lever 43 stops and remains in the rotation-stopped position. When the brake lever 43 remains in the rotation-stopped position, the rotation of the drive lever 28 also stops, and the drive lever 28 remains in the second rotation position.

[0155] At this point, the energization of coil 31 is stopped, and the rotation of rotor 32 is also stopped.

[0156] With the drive rod 28 held in the second rotational position as described above, the opening and closing blade 15, which operates as the drive rod 28 rotates, reaches the closed position. The operation from the open position to the closed position of the opening and closing blade 15 terminates, and the opening and closing blade 15 remains in the closed position to close the opening 13a of the base 13 (see...). Figure 8 ).

[0157] As described above, the blade opening and closing device 11 is provided with a brake lever 43 that can be operated between a deceleration start position and a rotation stop position, and the brake lever 43 is operated from the deceleration start position toward the rotation stop position, so that the rotational speed of the drive lever 28 decreases when rotating in the first rotation direction.

[0158] Therefore, since the rotational speed of the drive rod 28 is reduced by the brake rod 43 when it rotates in the first rotational direction, when the drive rod 28 is rotated by the driving force of the drive body 27, it is possible to prevent impact due to contact with another component of the drive rod 28 (e.g., the support base 20), and the drive rod 28 can be stably held in the second rotational position.

[0159] Furthermore, a rod support portion 44a is formed in the brake lever 43, and the drive lever 28 that rotates in the first rotation direction is supported by the rod support portion 44a.

[0160] Therefore, since the rotational speed of the drive rod 28 is reduced by the brake rod 43 and the drive rod 28 is supported by the brake rod 43, it is not necessary to separately provide components for reducing the rotational speed of the drive rod 28 and components for supporting the drive rod 28, and the proper operating state of the drive rod 28 can be ensured while reducing the number of components.

[0161] In addition, a brake stop member 25 is provided to press the brake lever 43 to stop the brake lever 43 in the rotation stop position, and the drive lever 28 is held in the second rotation position by the brake lever 43 stopped in the rotation stop position by the brake stop member 25.

[0162] Therefore, since the drive rod 28 supported by the rod support part 44a is held in the second rotational position when the brake rod 43 is stopped in the rotational stop position by the brake stop member 25, the drive rod 28 can be held in the second rotational position in a stable state while supported by the brake rod 43.

[0163] Once the operation of opening and closing blade 15 from the open position to the closed position is completed, the operation of opening and closing blade 15 from the closed position to the open position then begins. When the operation of opening and closing blade 15 from the closed position to the open position begins, the imaging element 12 enters the closed state (non-exposure state), in which no light enters through the electronic curtain.

[0164] The operation of opening and closing the blade 15 from the closed position to the open position is initiated by energizing the coil 31 in the opposite direction to the previous direction and rotating the drive rod 28 as the rotor 32 rotates.

[0165] When coil 31 is energized in the opposite direction, rotor 32 begins to rotate to the other side (see...). Figure 14 When rotor 32 begins to rotate to the other side, rotor 32 rotates independently of the rotation of drive rod 28 because drive rod 28 is held in the second rotation position by brake rod 43.

[0166] At this time, since the drive rod 28 does not rotate even when the rotor 32 rotates, the open and close blades 15 remain in the closed position.

[0167] When the rotor 32 rotates to a specific position on the other side, the operated part 45a of the brake lever 43 is pressed by the actuating part 39 as the rotor 32 rotates (see...). Figure 15 By pressing the operated part 45a with the actuating part 39, the brake lever 43 rotates from the rotation stop position to the deceleration start position.

[0168] When the brake lever 43 rotates from the stop position to the deceleration start position, the drive rod 28 supported by the brake lever 43 rotates along the second rotation direction from the second rotation position to the first rotation position, and the connecting shaft 42 separates from the brake lever 43. Therefore, the drive rod 28 is released from the state supported by the brake lever 43.

[0169] At this time, as the drive rod 28 rotates, the opening and closing blade 15 is operated from the closed position to the open position along the opening direction.

[0170] Because the drive rod 28 is biased in the second rotation direction by the vane return spring 22 and the bias spring 29, when the brake rod 43 is released from its supported state, the biasing force of the vane return spring 22 and the bias spring 29 is used as the driving force, and the drive rod rotates at high speed toward the first rotation position (see...). Figure 16 ).

[0171] At this time, since the rotor 32 rotates to the other side before the drive rod 28 rotates, the rotor magnet 34 remains in the state of being attracted to the yoke 30 by magnetic force, and returns to the initial state by positioning torque, and is pressed by the pressing part 37 into the state of pressing the receiving protrusion 20b of the support base 20. When the rotor 32 returns to the initial state, the energization of the coil 31 stops.

[0172] As described above, in the blade opening and closing device 11, the actuating part 39 is provided in the rotor 32, and the operated part 45a is provided in the brake lever 43. By pressing the operated part 45a by the actuating part 39, the brake lever 43 is operated from the rotation stop position toward the deceleration start position, and by operating the brake lever 43 from the rotation stop position toward the deceleration start position, the support state of the rod support part 44a of the drive lever 28 is released.

[0173] Therefore, when the operating part 45a is pressed by the actuating part 39 of the rotor 32 and the brake lever 43 is operated from the rotation stop position to the deceleration start position, the support state of the brake lever 43 relative to the drive lever 28 is released. Thus, as the rotor 32 rotates, the support state of the brake lever 43 relative to the drive lever 28 is released, and the drive lever 28 can be reliably rotated from the second rotation position to the first rotation position. This simplifies the structure and eliminates the need for a dedicated drive body 27 that applies the driving force to operate the brake lever 43 from the rotation stop position to the deceleration start position.

[0174] Furthermore, when the drive lever 28 is pressed by the operating part 45a, the support state of the drive lever 28 by the lever support part 44a is released.

[0175] Therefore, since the operated part 45a has the function of operating the brake lever 43 from the rotation stop position to the deceleration start position by the driving force of the rotor 32 and the function of pressing the drive lever 28 to release the support state of the drive lever 28 by the lever support part 44a, it is possible to reliably rotate the drive lever 28 from the second rotation position to the first rotation position while simplifying the structure of the brake lever 43.

[0176] When the connecting shaft 42 is pressed against the position holding part 21a of the shaft operating hole 21, the drive rod 28 rotating in the second rotation direction stops and is held in the first rotation position.

[0177] At this time, the brake lever 43 remains in the deceleration start position, the actuating part 39 of the rotor 32 is in contact with the operated part 45a, and the stopping part 45b is separated from the brake stopping part 25.

[0178] The connecting shaft 42 of the drive rod 28 is pressed against the position holding part 21a by the biasing force of the leaf return spring 22 and the biasing spring 29, and is held in the first rotational position.

[0179] As described above, in the blade opening and closing device 11, a support base 20 is provided on which the drive rod 28 is rotatably supported. A connecting shaft 42 to which the opening and closing blade 15 is connected is provided to the drive rod 28. A position holding part 21a that holds the drive rod 28 in a first rotational position is formed in the support base 20. The drive rod 28 is held in the first rotational position by pressing the connecting shaft 42 against the position holding part 21a.

[0180] Therefore, since the connecting shaft 42 connected to the opening and closing blade 15 is pressed against the position holding part 21a and the drive rod 28 is held in the first rotational position, it is not necessary to separately provide a part for connecting the opening and closing blade to the drive rod 28 and a part for holding the opening and closing blade 15 in the first rotational position, and the drive rod 28 can be reliably held in the first rotational position while simplifying the construction of the drive rod 28.

[0181] The blade 15 is opened and closed by rotation of the drive rod 28 in the opening direction, and the drive rod 28 is held in the open position by being held in the first rotational position (see...). Figure 7 ).

[0182] As described above, in imaging device 1, the so-called electronic front curtain shutter is composed of an electronic curtain that serves as the front curtain and an opening and closing blade 15 that is configured as a mechanical structure and serves as the rear curtain.

[0183] Some imaging devices use electronic shutters that electronically operate both the front and rear curtains. In this case, the front curtain operates with a clear charge, while the rear curtain operates through continuous readout. However, in the case of electronic shutters, the speed is limited by the sensor's readout speed, which can lead to a problem known as rolling shutter distortion, where the image obtained when photographing a moving subject is distorted. On the other hand, there are imaging devices that mechanically operate both the front and rear curtains. In this case, both a front curtain drive mechanism and a rear curtain drive mechanism are required, and there is a risk of increased size and number of parts in the imaging device.

[0184] Therefore, by employing an electronic front curtain shutter configuration, such as that in imaging device 1, which combines an electronic curtain with opening and closing blades 15, the occurrence of rolling shutter distortion can be suppressed while suppressing the increase in the size and number of components of imaging device 1.

[0185] Note that although an example of operating the open and close blade 15 from the open position to the closed position by the driving force of the drive body 27 has been described above, a spring mechanism may also be provided that applies a biasing force from the open position to the closed position to the open and close blade 15, and uses the biasing force of the spring mechanism as a driving force to rotate the drive rod 28 in a first rotational direction to operate the open and close blade 15 from the open position to the closed position.

[0186] <Operation of the blade opening and closing device when power is off>

[0187] Next, the operation in the imaging device when an impact occurs while coil 31 is not energized (see [link to documentation]). Figure 17 and 18 ).

[0188] There are situations where, for example, when the user moves the imaging device 1 before the power is turned on, or when the imaging device 1 is accidentally dropped, an impact occurs in the imaging device 1.

[0189] In this situation, the rotor 32 hardly rotates because it is held in its initial state by the positioning torque, but the drive rod 28 and the opening and closing blades 15 rotate from the first rotation position to the second rotation position in the first rotation direction according to the magnitude and direction of the force applied during the impact, resisting the biasing force of the blade return spring 22 and the biasing spring 29 (see...). Figure 17 ).

[0190] At this point, in the initial state, with the operating part 39 of the rotor 32 in contact with the operated part 45a, the brake lever 43 remains in the deceleration start position. Therefore, since the rotor 32 does not rotate, the brake lever 43 does not rotate from the deceleration start position to the rotation stop position.

[0191] The drive lever 28 can be rotated from a first rotational position to a second rotational position until the actuating base 41 contacts the operated part 45a of the brake lever 43. At this time, the opening and closing blade 15 operates in the closing direction toward the closing position as the drive lever 28 rotates.

[0192] When the force caused by the impact decreases, the drive rod 28 and the opening and closing blade 15 rotate toward the first rotation position in the second rotation direction by the biasing force of the blade return spring 22 and the biasing spring 29 (see...). Figure 18 At this time, due to the biasing force applied to the drive rod 28 and the opening and closing blade 15 by both the blade return spring 22 and the biasing spring 29, the drive rod 28 rotates at high speed toward the first rotation position, and the opening and closing blade 15 operates at high speed toward the open position.

[0193] When the connecting shaft 42 is pressed against the position holding part 21a of the shaft operating hole 21, the rotation of the drive rod 28 rotating in the second rotation direction is stopped and held in the first rotation position, and the opening and closing blades 15 operating in the opening direction are held in the open position.

[0194] As described above, in the blade opening and closing device 11, when the drive body 27 is not energized, the drive rod 28 can rotate independently of the rotor 32 in the first rotation direction.

[0195] Therefore, when the drive rod 28 rotates in the first rotation direction due to the impact generated when the rotor 32 is not rotating, the drive rod 28 rotates in the second rotation direction by a driving force different from the driving force of the rotor 32, and is held in the first rotation position. Therefore, the drive body 27 does not need to have a large positioning torque for holding the drive rod 28 in the first rotation position, and the drive body 27 can be miniaturized and power consumption can be reduced.

[0196] Furthermore, after the drive rod 28 rotates in the first rotation direction due to the impact, the drive rod 28 rotates in the second rotation direction and remains in the first rotation position by the biasing force of both the leaf return spring 22 and the biasing spring 29, so that the rotation in the second rotation direction is performed at high speed and with a large driving force.

[0197] Therefore, it is possible to suppress the bouncing caused by springback when the connecting shaft 42 in the drive rod 28 contacts the position holding part 21a, and shorten the time from the rotation of the drive rod 28 in the first rotation direction to its return to the first rotation position, so that the user can quickly use the imaging device 1 after the impact occurs, and improve usability.

[0198] Furthermore, since the center of gravity of the rotor 32 is located on or near the rotation axis, the rotor 32 is unlikely to rotate when an impact occurs, and the drive rod 28 is prevented from rotating in the first rotation direction as the rotor 32 rotates.

[0199] Summary

[0200] As described above, in the imaging device 1 and the blade opening and closing device 11, the drive rod 28 is made to rotate independently of the rotation operation of the rotor 32. The drive rod 28 rotates integrally with the rotor 32 in a first rotation direction by the driving force of the drive body 27, and the drive rod 28 rotates independently of the rotor 32 in a second rotation direction by at least the biasing force of the blade return spring 22.

[0201] Therefore, the drive rod 28 rotates in the first rotational direction together with the rotor 32, and rotates in the second rotational direction separately from the rotor 32, and is held in the second rotational position at least by the biasing force of the blade return spring 22. Thus, it is not necessary to generate a driving force in the drive body 27 to overcome the magnitude of the positioning torque to rotate the drive rod 28 toward the second rotational position, and power consumption and the size of the drive body 27 can be reduced.

[0202] In addition, a bias spring 29 is provided, which is supported between the rotor 32 and the drive rod 28 and biases the drive rod 28 in the second rotational direction.

[0203] Therefore, since the biasing spring 29, which biases the drive rod 28 in the second rotation direction, is supported between the rotor 32 and the drive rod 28, and the drive rod 28 rotates integrally with the rotor 32 in the first rotation direction, the biasing force of the biasing spring 29 does not become a load on the driving force of the drive body 27 when the drive rod 28 rotates in the first rotation direction. Therefore, the driving force of the drive body 27 that causes the drive rod 28 to rotate in the first rotation direction can be reduced. Furthermore, since the drive rod 28 rotates in the second rotation direction due to the biasing forces of both the blade return spring 22 and the biasing spring 29, the drive rod 28 can reliably rotate to the first rotation position at high speed.

[0204] Furthermore, in the imaging device 1 and the blade opening and closing device 11, when the driving force is not applied from the bias spring 29 to the drive rod 28, a driving force along the first rotation direction is applied from the drive body 27, and when the driving force is not applied from the drive body 27 to the drive rod 28, a driving force along the second rotation direction is applied from the bias spring 29.

[0205] Therefore, when the opening and closing blade 15 is operated in the closing direction to close the opening 13a, a rotation operation in the first rotation direction is performed without the driving force being applied from the bias spring 29 to the drive rod 28, and when the opening and closing blade 15 is operated in the opening direction to open the opening 13a, a rotation operation in the second rotation direction is performed without the driving force being applied from the drive body 27 to the drive rod 28.

[0206] Therefore, when the blade 15 is operated from the open position to the closed position, it is not necessary to apply a large driving force to the drive rod 28, and the size and power consumption of the drive body 27 can be reduced.

[0207] Furthermore, since a blade return spring 22 is provided that biases the opening and closing blades 15 in the opening direction and the drive rod 28 in the second rotation direction, the drive rod 28 can be rotated in the second rotation direction by the driving force of both the bias spring 29 and the blade return spring 22, so that the drive rod 28 can rotate at high speed in the second rotation direction to shorten the operation time.

[0208] Furthermore, the drive body 27 with rotor 32 is configured as a drive body such that the drive rod 28 can rotate independently of the rotation operation of rotor 32. The drive rod 28 rotates integrally with rotor 32 in a first rotation direction by the driving force of drive body 27, and the drive rod 28 rotates independently of rotor 32 in a second rotation direction by the driving force of bias spring 29.

[0209] Therefore, since the drive rod 28 rotates in the first rotation direction by the driving force of the drive body 27 and in the second rotation direction by the driving force of the bias spring 29, the drive rod 28 can reliably and smoothly rotate in the first and second rotation directions with a simple structure.

[0210] <Another example of a blade-opening and closing device>

[0211] The following will describe an example using a drive rod 28A constructed differently from the drive rod 28 described above (see Figures 19 to 24 ).

[0212] Note that the operation in the example using drive lever 28A differs from that in the example using drive lever 28 only in that the opening and closing blade 15 moves from the closed position to the open position along the opening direction. Therefore, the operation when the opening and closing blade 15 moves from the closed position to the open position will be described in detail below. Operations and configurations that are no different from those in the example using drive lever 28 are indicated by the same reference numerals as those used in the example using drive lever 28, and their detailed descriptions will be omitted.

[0213] The drive lever 28A is provided with a deceleration function part 41d, which extends from the rotation fulcrum part 41a in a direction substantially opposite to that of the pressed part 41c (see...). Figure 19 ).

[0214] In the initial state before operating the power button 6 of the imaging device 1, the coil 31 is not energized, no driving force is generated in the drive body 27, and the rotation of the rotor 32 is stopped (see...). Figure 19 In the initial state, the drive rod 28A is biased in the second rotation direction by the biasing force of the biasing spring 29, and the connecting shaft 42 is pressed against the position holding portion 21A of the shaft operating hole 21 formed in the support base 20 and held in the first rotation position.

[0215] At this time, the deceleration function part 41d of the drive lever 28A is in contact with the operated part 45a of the brake lever 43, and the action part 39 of the rotor 32 is not in contact with the operated part 45a of the brake lever 43, and is located at a certain distance.

[0216] In the initial state described above, when coil 31 is energized, rotor 32 rotates to one side in a manner similar to that when using drive rod 28. Drive rod 28A rotates from a first rotation position to a second rotation position along a first rotation direction, and the opening and closing blades 15 are operated from the open position to the closed position. Therefore, drive rod 28A is held in the second rotation position by brake rod 43 (see...). Figure 20 ).

[0217] Once the operation of opening and closing blade 15 from the open position to the closed position is completed, the operation of opening and closing blade 15 from the closed position to the open position then begins. When coil 31 is energized in the opposite direction to the direction during the operation of opening and closing blade 15 from the open position to the closed position, the operation of opening and closing blade 15 from the closed position to the open position begins, and drive rod 28A rotates with the rotation of rotor 32.

[0218] When coil 31 is energized in the opposite direction, rotor 32 begins to rotate to the other side (see...). Figure 21 When rotor 32 begins to rotate to the other side, rotor 32 rotates independently of the rotation of drive rod 28A because drive rod 28A is held in the second rotation position by brake rod 43.

[0219] At this time, since the drive rod 28A does not rotate even when the rotor 32 rotates, the open and close blades 15 remain in the closed position.

[0220] When the rotor 32 rotates to a certain position on the other side, the operated part 45a of the brake lever 43 is pressed by the actuating part 39 as the rotor 32 rotates (see...). Figure 22 By pressing the operated part 45a with the actuating part 39, the brake lever 43 rotates from the rotation stop position to the deceleration start position.

[0221] When the brake lever 43 rotates from the stop position to the deceleration start position, the drive rod 28A supported by the brake lever 43 rotates along the second rotation direction from the second rotation position to the first rotation position, and the connecting shaft 42 separates from the brake lever 43. Therefore, the drive rod 28A is released from the state supported by the brake lever 43.

[0222] At this time, as the drive rod 28A rotates, the opening and closing blade 15 is operated from the closed position to the open position in the opening direction.

[0223] Since the drive rod 28A is biased in the second rotation direction by the vane return spring 22 and the bias spring 29, when the support state of the brake rod 43 is released, the biasing force of the vane return spring 22 and the bias spring 29 is used as the driving force, and the drive rod rotates at high speed toward the first rotation position.

[0224] At this time, since the rotor 32 rotates to the other side before the drive rod 28A rotates, the rotor magnet 34 remains in the state of being attracted to the yoke 30 by magnetic force, and returns to the initial state by positioning torque, and is pressed against the receiving protrusion 20b of the support base 20 by the pressing part 37 (see...). Figure 23 When rotor 32 returns to its initial state, energizing coil 31 is stopped.

[0225] In the drive rod 28A rotating in the second rotation direction, the deceleration function part 41d contacts the operated part 45a of the brake rod 43. At this time, the connecting shaft 42 of the drive rod 28A separates from the position holding part 21a of the shaft operating hole 21. Therefore, the drive rod 28A rotates further towards the first rotation position, but the rotation speed is reduced by the operated part 45a.

[0226] The drive lever 28A rotates in the state of deceleration to the first rotation position, and the brake lever 43 rotates to the deceleration start position along with the rotation of the drive lever 28A (see...). Figure 24 When the connecting shaft 42 is pressed against the position holding part 21a of the shaft operating hole 21, the rotation of the drive rod 28A stops, and the drive rod is held in the first rotation position.

[0227] In the brake lever 43, at the deceleration start position, the deceleration function part 41d of the drive lever 28A contacts the operated part 45a, and the stop part 45b separates from the brake stop part 25. At this time, the actuating part 39 of the rotor 32 separates from the operated part 45a.

[0228] The blade 15 is opened and closed by rotating the drive rod 28A in the opening direction and is held in the open position by holding the drive rod 28A in the first rotation position.

[0229] As described above, the drive lever 28A is provided with a deceleration function part 41d that contacts a portion of the brake lever 43 when rotating in the second rotation direction, and the drive lever 28A decelerates between the first rotation position and the second rotation position through the contact between the deceleration function part 41d and this portion of the brake lever 43.

[0230] Therefore, since the drive lever 28A decelerates when rotating in the second rotation direction, the drive lever 28A stops at the first rotation position in the decelerated state, and the sudden stop of the drive lever 28A at the first rotation position is suppressed, thereby reducing the impact and sound felt by the user's fingers when the user operates the shutter button 4, and ensuring a good operating feel when the user operates.

[0231] Furthermore, since the drive rod 28A rotates to the first rotation position in a decelerated state, it suppresses multiple rebounds of the connecting shaft 42 relative to the position holding part 21a when the drive rod 28A rotates to the first rotation position, and also suppresses the tremor phenomenon at the open position of the open and close blades 15.

[0232] Therefore, since the swing operation time of opening and closing the blade 15 is shortened or the swing operation does not occur, the next operation of opening and closing the blade 15 can be started quickly, and the availability of the imaging device 1 can be improved by increasing the continuous shooting speed.

[0233] Furthermore, the deceleration function unit 41d contacts the operated part 45a pressed by the actuating part 39 of the rotor 32, and decelerates when the drive rod 28A rotates in the second rotation direction.

[0234] Therefore, the components for slowing down the rotor 32 and the components for slowing down the drive rod 28A are made to be shared, and apart from the brake rod 43, there is no need to provide a dedicated component for slowing down the drive rod 28A. This also suppresses the bouncing of the drive rod 28A at the first rotation position, while reducing the number of parts and simplifying the structure.

[0235] <Other>

[0236] The blade opening and closing device 11 mainly includes a drive block 50 and a mechanism block 60. The drive block 50 includes a drive rod 28, a yoke 30, a coil 31, a rotor 32, and a brake rod 43. The mechanism block 60 mainly includes a base 13, a pressing plate 14, and blades 15 for opening and closing (see...). Figure 25 ).

[0237] As described above, the drive block 50 mainly includes a drive rod 28, a yoke 30, a coil 31, a rotor 32, and a brake rod 43, and has a simple structure and reduced size.

[0238] As described above, in the imaging device 1, due to the reduced size of the drive block 50, the width of the drive block 50 in the direction of movement (vertical direction) of the opening and closing blades 15 is smaller than the width of the mechanism block 60. Therefore, with the drive block 50 positioned on the side of the mechanism block 60, arrangement spaces can be formed on both sides of the drive block 50 inside the housing 2 in the direction of movement of the opening and closing blades 15.

[0239] Therefore, in the imaging device 1, terminal portions 70, 70 are arranged on both sides of the drive block 50 along the moving direction of the opening and closing blades 15. Terminal portions 70 are, for example, terminals for headphones, terminals for microphones, or terminals for connecting to external devices such as High Definition Multimedia Interface (HDMI: registered trademark) or Universal Serial Bus (USB).

[0240] As described above, in the imaging device 1, the size of the drive block 50 in the moving direction of opening and closing the blade 15 is made smaller than the size of the mechanism block 60. The drive block 50 is located on the outer periphery of the mechanism block 60, and the terminal portions 70, 70 are arranged on the opposite side of the outer periphery of the mechanism block 60, with the drive block 50 located between them in the moving direction of opening and closing the blade 15.

[0241] Therefore, since the terminal portions 70, 70 are arranged in the space on the outer periphery of the mechanism block 60, the imaging device 1 can be miniaturized by effectively utilizing the arrangement space.

[0242] <An embodiment of an imaging device>

[0243] In the following, configuration examples of embodiments of the imaging device according to the present technology will be described (see Figure 26 ).

[0244] Imaging device 1 includes a camera block 90 with imaging function, a camera signal processing unit 91 that performs signal processing such as analog-to-digital conversion of captured image signals, and an image processing unit 92 that performs recording / reproducing image signals. Furthermore, imaging device 1 includes a display unit 93 (display 7) for displaying captured images, a reader / writer (R / W) 94 for writing and reading image signals from a memory 100, a central processing unit (CPU) 95 for controlling the entire imaging device 1, a lens drive control unit 96 for controlling the driving of lenses arranged in the camera block 90, and operation units 97 such as various switches (shutter button 4, zoom switch 5, power button 6, operation unit 8, etc.) for users to perform desired operations.

[0245] Camera block 90 can be configured as interchangeable lens 200.

[0246] The imaging device 1 is provided with an imaging element 12, such as a charge-coupled device (CCD) or complementary metal-oxide-semiconductor (CMOS), which converts the optical image captured by the camera block 90 into an electrical signal.

[0247] The camera signal processing unit 91 performs various types of signal processing on the output signal from the imaging element 12, such as converting it into a digital signal, noise removal, image quality correction, and conversion into luminance / chrominance signals.

[0248] The image processing unit 92 performs image signal compression encoding / expanded decoding processing, data specification conversion processing such as resolution, etc., based on a predetermined image data format.

[0249] Display unit 93 has the function of displaying various data such as the user's operation status on operation unit 97 and captured images. Note that imaging device 1 may not have display unit 93 and may be configured to send captured image data to another display device and display the image.

[0250] R / W 94 writes image data encoded by image processing unit 92 into memory 100 and reads image data recorded in memory 100.

[0251] The CPU 95 serves as a control processing unit for each circuit block set up in the imaging device 1, and controls each circuit block based on indication input signals from the operation unit 97, etc.

[0252] The lens drive control unit 96 controls the lens drive unit that moves the lens based on the control signal from the CPU 95.

[0253] The operation unit 97 outputs an instruction input signal corresponding to the user's operation to the CPU 95.

[0254] The memory 100 is, for example, a semiconductor memory that can be attached to and removed from a slot connected to the R / W 94, or a semiconductor memory pre-incorporated into the imaging device 1.

[0255] The operation of imaging device 1 will be described below.

[0256] In the shooting standby state, under the control of CPU 95, the captured image signal is output to display unit 93 via camera signal processing unit 91 and displayed as an image captured by the camera. Furthermore, when an instruction input signal is input from operation unit 97, CPU 95 outputs a control signal to lens drive control unit 96, and the lens is moved under the control of lens drive control unit 96.

[0257] When a shooting operation is performed according to the instruction input signal from the operation unit 97, the captured image signal is output from the camera signal processing unit 91 to the image processing unit 92, where it undergoes compression encoding and is converted into digital data in a predetermined data format. The converted data is output to the R / W 94 and written to the memory 100.

[0258] When reproducing image data recorded in memory 100, predetermined image data is read from memory 100 via R / W 94 according to the operation of operation unit 97, and after decompression and decoding processing is performed by image processing unit 92, the reproduced image signal is output to display unit 93 and the reproduced image is displayed.

[0259] Note that in this technology, "imaging" refers to a series of processes, including only a portion or all of them, ranging from photoelectric conversion processing that converts light captured by imaging element 12 into electrical signals, to processing by camera signal processing unit 91 that converts the output signal from imaging element 12 into digital signals, noise removal, image quality correction, conversion into luminance / chrominance signals, etc., to compression encoding / decompression decoding processing of image signals based on a predetermined image data format by image processing unit 92, to conversion processing of data specifications such as resolution, and to write processing by R / W 94 that writes image signals into memory 100.

[0260] That is, “imaging” can refer only to the photoelectric conversion process of converting light captured by the imaging element 12 into an electrical signal, or it can refer to the process from the photoelectric conversion process of converting light captured by the imaging element 12 into an electrical signal to processes such as conversion to digital signals, noise removal, image quality correction, and conversion of the output signal from the imaging element 12 into a luminance / chrominance signal by the camera signal processing unit 91, or it can refer to the process from the photoelectric conversion process of converting light captured by the imaging element 12 into an electrical signal to processes such as conversion of the output signal from the imaging element 12 into a digital signal, noise removal, image quality correction, and conversion of the output signal from the imaging element 12 into a luminance / chrominance signal by the camera signal processing unit 91, and then to the compression encoding / decompression decoding process of the image signal based on a predetermined image data format and the conversion process of data specifications such as resolution by the image processing unit 92. This processing can refer to everything from photoelectric conversion processing, which converts light captured by imaging element 12 into electrical signals, to processing such as conversion to digital signals by camera signal processing unit 91, noise removal, image quality correction, and conversion to luminance / chrominance signals; compression encoding / expanded decoding processing of image signals based on a predetermined image data format by image processing unit 92; and conversion processing of data specifications such as resolution. It can also refer to processing up to the writing of the image signal to memory 100 by R / W 94. The order of each process can be appropriately varied within the above processing.

[0261] Furthermore, in this technology, the camera block 90 and the imaging device 1 may include only a portion or all of the imaging element 12, camera signal processing unit 91, image processing unit 92 and R / W 94 that perform the above-described processing.

[0262] In addition, the camera block 90 may include some of the imaging element 12, camera signal processing unit 91, image processing unit 92 and R / W 94, while the device body 200 may include the remaining parts.

[0263] <This technology>

[0264] This technology can also be configured as follows.

[0265] (1) A blade opening and closing device, comprising:

[0266] Includes the drive unit of the rotor;

[0267] The drive rod is capable of rotating along a first rotation direction from a first rotational position to a second rotational position and a second rotation direction from a second rotational position to a first rotational position.

[0268] The blades open and close, operated in a closing direction (closing the opening) as the drive rod rotates in the first rotational direction, and operated in an opening direction (opening the opening) as the drive rod rotates in the second rotational direction; and

[0269] The vane return spring biases the vane in the opening direction to open and close it, and biases the drive rod in the second rotational direction.

[0270] The drive rod can rotate independently of the rotor's rotation.

[0271] The drive rod rotates integrally with the rotor in the first rotational direction due to the driving force of the drive body, and

[0272] The drive rod rotates independently of the rotor in the second rotational direction, at least by the biasing force of the blade return spring.

[0273] (2) The blade opening and closing device according to (1) above, wherein

[0274] When the drive unit is not energized, the drive rod can rotate independently of the rotor in the first rotation direction.

[0275] (3) The blade opening and closing device according to (2) above, wherein

[0276] The rotor's center of gravity is located on the rotation axis.

[0277] (4) The blade opening and closing device according to any one of (1) to (3) above, wherein

[0278] The rotor's rotation axis and the drive rod's rotation axis are the same.

[0279] (5) The blade opening and closing device according to any one of (1) to (4) above, wherein

[0280] The rotor is equipped with a pressing part.

[0281] The drive lever is provided with a pressed part that is pressed by the pressing part, and

[0282] When the pressed part is pressed by the pressing part, the driving force of the driving body causes the driving rod to rotate in the first rotation direction.

[0283] (6) The blade opening and closing device according to any one of (1) to (5) above further includes

[0284] A brake lever that can be operated between the deceleration start position and the rotation stop position.

[0285] Specifically, when the brake lever is operated from the deceleration start position toward the rotation stop position, the rotational speed of the drive lever decreases as it rotates along the first rotation direction.

[0286] (7) The blade opening and closing device according to (6) above further includes

[0287] The rod support portion formed on the brake lever,

[0288] The drive rod that rotates in the first rotation direction is supported by the rod support.

[0289] (8) The blade opening and closing device according to (7) above further includes

[0290] A braking stop mechanism that presses down the brake lever and stops it at the rotation stop position.

[0291] The brake lever is stopped at the rotation stop position by the brake stop member, and the drive lever is held at the second rotation position.

[0292] (9) The blade opening and closing device according to (7) or (8) above, wherein

[0293] The rotor is provided with a working part.

[0294] The brake lever is equipped with an actuated part.

[0295] By pressing the operated part with the actuating part, the brake lever is operated from the rotation stop position to the deceleration start position, and

[0296] As the brake lever moves from the stop position to the deceleration start position, the support of the lever support on the drive lever is released.

[0297] (10) The blade opening and closing device according to (9) above, wherein

[0298] When the drive lever is pressed by the operated part, the support of the lever support part on the drive lever is released.

[0299] (11) The blade opening and closing device according to (9) or (10) above, wherein

[0300] The drive lever is equipped with a deceleration function. When it rotates in the second rotation direction, the deceleration function contacts a portion of the brake lever, and

[0301] By contacting a portion of the deceleration function with the brake lever, the drive lever is decelerated between the first rotational position and the second rotational position.

[0302] (12) The blade opening and closing device according to (11) above, wherein

[0303] The deceleration function unit comes into contact with the operated unit.

[0304] (13) The blade opening and closing device according to any one of (1) to (12) above, wherein

[0305] A support base is provided, on which the drive rod is rotatably supported.

[0306] The drive rod is equipped with a connecting shaft, and the opening and closing blades are connected to the connecting shaft.

[0307] A position holding portion is formed in the support base to hold the drive rod at the first rotational position, and

[0308] By using the bias force of the leaf return spring to press the connecting shaft against the position holding part, the drive rod is held in the first rotation position.

[0309] (14) The blade opening and closing device according to any one of (1) to (13) above further includes

[0310] A biasing spring is supported between the rotor and the drive rod, and biases the drive rod in the second rotational direction.

[0311] (15) The blade opening and closing device according to (14) above, wherein

[0312] A portion of the rotor and drive rod are positioned opposite each other in the direction of the rotor's rotation axis, and

[0313] The bias spring is positioned between the opposing rotor and a portion of the drive rod.

[0314] (16) An imaging device, comprising:

[0315] A device for controlling the opening and closing of blades by means of light captured through an optical system; and an imaging element for photoelectric conversion of light captured through an optical system.

[0316] The blade opening and closing devices include:

[0317] Includes the drive unit of the rotor;

[0318] The drive rod is capable of rotating along a first rotation direction from a first rotational position to a second rotational position and a second rotation direction from a second rotational position to a first rotational position.

[0319] The blades are opened and closed, and the opening and closing of the blades are operated in the closing direction of closing the opening as the drive rod rotates in the first rotation direction, and in the opening direction of opening the opening as the drive rod rotates in the second rotation direction;

[0320] The vane return spring biases the vane in the opening direction to open and close it, and biases the drive rod in the second rotational direction.

[0321] The drive rod can rotate independently of the rotor's rotation.

[0322] The drive rod rotates integrally with the rotor in the first rotational direction due to the driving force of the drive body, and

[0323] The drive rod rotates independently of the rotor in the second rotational direction, at least by the biasing force of the blade return spring.

[0324] (17) The imaging device according to (16) above, wherein

[0325] The blade opening and closing device includes a drive block containing a drive body and a mechanism block containing a blade for opening and closing.

[0326] In the direction of movement when the blades are opening and closing, the size of the drive block is smaller than the size of the mechanism block.

[0327] The drive block is located on the outer periphery of the mechanism block, and

[0328] The terminal section is located on the outer periphery of the mechanism block, opposite to the drive block along the direction of movement of the opening and closing blades.

[0329] List of reference numerals

[0330] 1 Imaging equipment

[0331] 11-blade opening and closing device

[0332] 12 imaging elements

[0333] 13A opening

[0334] 15. Open and close the blades

[0335] 20 Support Base

[0336] 21 Position Holding Section

[0337] 22-blade return spring

[0338] 25 Braking and Stopping Components

[0339] 27 driving bodies

[0340] 28 drive levers

[0341] 29 bias springs

[0342] 32 rotors

[0343] 38 pressing parts

[0344] 39 Functional Part

[0345] 41c Pressed part

[0346] 42 connecting shafts

[0347] 43 Brake lever

[0348] 44a pole support section

[0349] 45a is operated by the department

[0350] 50 drive blocks

[0351] 60 mechanism blocks

[0352] 70 terminal section

[0353] 28A drive lever

[0354] 41d deceleration function unit

Claims

1. A blade opening and closing device, comprising: Includes the drive unit of the rotor; The drive rod is capable of rotating along a first rotation direction from a first rotational position to a second rotational position and a second rotation direction from a second rotational position to a first rotational position. The blades are opened and closed, and the opening and closing of the blades are operated in the closing direction of closing the opening as the drive rod rotates in the first rotation direction, and in the opening direction of opening the opening as the drive rod rotates in the second rotation direction; as well as The vane return spring biases the vane in the opening direction to open and close it, and biases the drive rod in the second rotational direction. The drive rod can rotate independently of the rotor's rotation. The drive rod rotates integrally with the rotor in the first rotational direction due to the driving force of the drive body, and The drive rod rotates independently of the rotor in the second rotational direction, at least by the biasing force of the blade return spring.

2. The blade opening and closing device according to claim 1, wherein... When the drive unit is not energized, the drive rod can rotate independently of the rotor in the first rotation direction.

3. The blade opening and closing device according to claim 2, wherein... The rotor's center of gravity is located on the rotation axis.

4. The blade opening and closing device according to claim 1, wherein... The rotor's rotation axis and the drive rod's rotation axis are the same.

5. The blade opening and closing device according to claim 1, wherein... The rotor is equipped with a pressing part. The drive lever is provided with a pressed part that is pressed by the pressing part, and When the pressed part is pressed by the pressing part, the driving force of the driving body causes the driving rod to rotate in the first rotation direction.

6. The blade opening and closing device according to claim 1, further comprising: A brake lever that can be operated between the deceleration start position and the rotation stop position. in, When the brake lever is operated from the deceleration start position toward the rotation stop position, the rotational speed of the drive lever decreases as it rotates in the first rotation direction.

7. The blade opening and closing device according to claim 6, further comprising: The rod support portion formed on the brake lever, in, The drive rod that rotates in the first rotation direction is supported by the rod support.

8. The blade opening and closing device according to claim 7, further comprising: A braking stop mechanism that presses down the brake lever and stops it at the rotation stop position. in, The brake lever is stopped at the rotation stop position by the brake stop member, and the drive lever is held at the second rotation position.

9. The blade opening and closing device according to claim 7, wherein... The rotor is provided with a working part. The brake lever is equipped with an actuated part. By pressing the operated part with the actuating part, the brake lever is operated from the rotation stop position to the deceleration start position, and As the brake lever moves from the stop position to the deceleration start position, the support of the lever support on the drive lever is released.

10. The blade opening and closing device according to claim 9, wherein... When the drive lever is pressed by the operated part, the support of the lever support part on the drive lever is released.

11. The blade opening and closing device according to claim 9, wherein... The drive lever is equipped with a deceleration function. When it rotates in the second rotation direction, the deceleration function contacts a portion of the brake lever, and By contacting a portion of the deceleration function with the brake lever, the drive lever is decelerated between the first rotational position and the second rotational position.

12. The blade opening and closing device according to claim 11, wherein... The deceleration function unit comes into contact with the operated unit.

13. The blade opening and closing device according to claim 1, wherein... A support base is provided, on which the drive rod is rotatably supported. The drive rod is equipped with a connecting shaft, and the opening and closing blades are connected to the connecting shaft. A position holding portion is formed in the support base to hold the drive rod at the first rotational position, and By using the bias force of the leaf return spring to press the connecting shaft against the position holding part, the drive rod is held in the first rotation position.

14. The blade opening and closing device according to claim 1, further comprising: A biasing spring is supported between the rotor and the drive rod, and biases the drive rod in the second rotational direction.

15. The blade opening and closing device according to claim 14, wherein... A portion of the rotor and drive rod are positioned opposite each other in the direction of the rotor's rotation axis, and The bias spring is positioned between the opposing rotor and a portion of the drive rod.

16. An imaging device, comprising: A device for opening and closing blades by controlling light captured through an optical system; And imaging elements that perform photoelectric conversion on light captured by the optical system. The blade opening and closing devices include: Includes the drive unit of the rotor; The drive rod is capable of rotating along a first rotation direction from a first rotational position to a second rotational position and a second rotation direction from a second rotational position to a first rotational position. The blades are opened and closed, and the opening and closing of the blades are operated in the closing direction of closing the opening as the drive rod rotates in the first rotation direction, and in the opening direction of opening the opening as the drive rod rotates in the second rotation direction; The vane return spring biases the vane in the opening direction to open and close it, and biases the drive rod in the second rotational direction. The drive rod can rotate independently of the rotor's rotation. The drive rod rotates integrally with the rotor in the first rotational direction due to the driving force of the drive body, and The drive rod rotates independently of the rotor in the second rotational direction, at least by the biasing force of the blade return spring.

17. The imaging device according to claim 16, wherein The blade opening and closing device includes a drive block containing a drive body and a mechanism block containing a blade for opening and closing. In the direction of movement when the blades are opening and closing, the size of the drive block is smaller than the size of the mechanism block. The drive block is located on the outer periphery of the mechanism block, and The terminal section is located on the outer periphery of the mechanism block, opposite to the drive block along the direction of movement of the opening and closing blades.

Images