WO2021065166A1 - Blade opening/closing device and imaging device - Google Patents

Blade opening/closing device and imaging device Download PDF

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Publication number
WO2021065166A1
WO2021065166A1 PCT/JP2020/028472 JP2020028472W WO2021065166A1 WO 2021065166 A1 WO2021065166 A1 WO 2021065166A1 JP 2020028472 W JP2020028472 W JP 2020028472W WO 2021065166 A1 WO2021065166 A1 WO 2021065166A1
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WO
WIPO (PCT)
Prior art keywords
opening
closing
blade
spring
drive
Prior art date
Application number
PCT/JP2020/028472
Other languages
French (fr)
Japanese (ja)
Inventor
将文 米田
彰久 森口
Original Assignee
ソニー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ソニー株式会社 filed Critical ソニー株式会社
Publication of WO2021065166A1 publication Critical patent/WO2021065166A1/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/36—Sliding rigid plate

Definitions

  • This technology relates to a technical field of a blade opening / closing device having a magnetic drive unit for opening / closing the opening / closing blade and a driving body, and an imaging device equipped with the magnetic drive unit.
  • image pickup devices such as video cameras and still cameras are provided with an optical system having a lens group, an optical element, or the like inside, and an image pickup element that photoelectrically converts the light captured by the optical system.
  • Some such image pickup devices include light incident on the image pickup device via a focal plane shutter that functions as a blade opening / closing device, for example, when a subject is photographed.
  • the blade opening / closing device is provided with a base body having an opening, an opening / closing blade that moves (runs) with respect to the base body, and a magnetic drive unit that operates the opening / closing blade.
  • the blades open and close the opening (see, for example, Patent Document 1).
  • the opening / closing blade is operated in a predetermined state by the magnetic drive unit in each mode.
  • the magnetic drive unit is provided with a magnet, a coil, and a yoke, and the opening / closing blades are moved along with the magnet rotated by supplying a drive current to the coil.
  • the opening / closing blade is in the opening position for opening the opening or the closing position for closing the opening.
  • the light transmitted through the aperture is sequentially incident on the image pickup surface of the image sensor from one side to the other to perform exposure, and the incident light is sequentially photoelectrically converted by the image sensor to generate an image signal. Then, the generated image signal is transferred to the memory to generate an image of the subject.
  • the traveling speed of the opening / closing blade is increased in accordance with the diversification of shooting modes and the like.
  • the purpose of the blade switchgear and the imaging device of the present technology is to overcome the above-mentioned problems and to increase the traveling speed of the switchgear without increasing the size of the magnetic drive unit and the increase in power consumption. ..
  • the blade opening / closing device includes an opening / closing blade that is operated in the opening / closing direction to open / close the opening, a coil to which a driving current is supplied, a magnet that is rotated by energizing the coil, and the magnet.
  • a magnetic drive unit having a rotor gear that is rotated with the rotation of the magnet, a drive body that has a drive gear that is meshed with the rotor gear and is rotated in the opposite direction to the magnet, and the drive body.
  • the opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction, and the opening / closing blade is operated in the opening / closing direction in accordance with the rotational operation of the drive body.
  • the opening / closing blade is operated by the driving force of at least one of the driving body or the magnetic driving unit.
  • the opening / closing blades are operated in the opening / closing direction by the driving force of at least one of the magnetic drive unit and the driving body, so that the degree of freedom regarding the operation control of the opening / closing blades is improved.
  • the magnetic driving unit and the driving body are arranged side by side in the same direction as the opening / closing direction of the opening / closing blade.
  • the magnetic drive unit and the drive body are arranged so as not to line up in the traveling direction of the light passing through the opening.
  • the drive body is provided with a supported shaft portion that functions as a rotation fulcrum portion, a torsion coil spring is used as the traveling spring, and the traveling spring is supported by the traveling spring. It is desirable to be supported by the shaft.
  • a locking member having a locking portion and operating between a locked position and a non-locking position is provided, a locked portion is formed on the driving body, and the locked portion is formed at the locked position. It is desirable that the drive body is locked to the lock member by pressing the locked portion against the lock portion by the urging force of the traveling spring.
  • the locked portion is pressed against the locked portion by the urging force of the traveling spring, so that the initial position of the drive body before the start of the opening / closing operation of the opening / closing blade is determined.
  • the lock member is attracted to an unlocked body that is operated between the lock holding position and the unlocked position and operates between the locked position and the unlocked position. It is desirable to provide an electromagnet that holds the unlocked body at the lock holding position and an unlocking spring that urges the unlocked body toward the unlocked position.
  • the unlocked body is held in the lock holding position by the electromagnet, and by releasing the action of the electromagnet on the unlocked body, the unlocked body is moved from the lock holding position to the unlocked position by the urging force of the unlocking spring. It becomes possible to operate.
  • the rotation speed is reduced as the rotation end approaches the rotation end, and the rotation of the drive body is stopped, so that sudden deceleration of the drive body and impact from the drive body to each part are suppressed.
  • the brake lever is rotatable, and the brake lever is provided with a brake arm pressed by the driving body and an action arm pressing the unlocking body.
  • the brake arm is pressed by the driving body, the unlocking body is pressed by the acting arm, so that the unlocking body is operated from the unlocking position to the lock holding position, and the locking member is operated. It is desirable to operate from the unlocked position to the locked position.
  • the brake lever decelerates the drive body and operates the unlocked body from the unlocked position to the lock holding position. Therefore, the deceleration of the drive body and the operation of the unlocked body are performed separately. It is not necessary to provide the mechanism of.
  • the unlocking body has a holding lever attracted to the electromagnet and a releasing arm pressed by the brake lever, and the holding lever and the releasing arm are separately provided. It is desirable to be rotatable.
  • the release arm is urged by the lock release spring, and a return spring for urging the holding lever in a direction approaching the release arm is provided, and the return spring is attached. It is desirable that the force be smaller than the urging force of the unlock spring.
  • the holding lever is rotated in the direction of approaching the release arm by the return spring having an urging force smaller than the urging force of the unlocking spring.
  • the opening / closing blade is connected to the driving body via a link, the link is formed in a shape having a longitudinal direction and a lateral direction, and an odd number of prepregs are laminated.
  • the prepreg is formed of carbon fiber reinforced plastic, and the fiber direction of the prepreg is set to the longitudinal direction or the lateral direction, and the prepreg whose fiber direction is the longitudinal direction is formed as the longitudinal fiber prepreg, and the fiber direction is the lateral direction.
  • the formed prepreg is formed as a short fiber prepreg, and the longitudinal fiber prepreg and the short fiber prepreg are alternately laminated so that the number of the longitudinal fiber prepregs is larger than the number of the short fiber prepregs.
  • the imaging device includes a blade opening / closing device that controls the light taken in through the optical system and an imaging element that photoelectrically converts the light taken in through the optical system, and the blade opening / closing device has an opening.
  • Magnetism having an opening / closing blade that is operated in an opening / closing direction, a coil to which a driving current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet.
  • a drive unit a drive body having a drive gear meshed with the rotor gear and rotating in the opposite direction to the magnet, and an opening / closing blade via the driving body to one side in the opening / closing direction. It is provided with a traveling spring that applies urging force, and the opening / closing blade is operated in the opening / closing direction in accordance with the rotational operation of the drive body.
  • the opening / closing operation of the opening / closing blade can be performed by the driving force of the magnetic drive unit and the urging force of the traveling spring generated by energizing the coil.
  • FIG. 2 to 30 show an embodiment of the blade opening / closing device and the image pickup device of the present technology, and this figure is a perspective view of the image pickup device. It is a perspective view which shows the image pickup apparatus in the state which was seen from the direction different from FIG. It is a schematic side view of the image pickup apparatus. It is a perspective view of the blade opening / closing device. It is an exploded perspective view of the blade opening / closing device. It is a front view which shows the state which the opening / closing blade is held in an open position. It is a front view which shows the state which the opening / closing vane is held in a closed position. It is an exploded perspective view which shows the drive mechanism and the like.
  • FIG. 5 is an enlarged perspective view showing a magnet, a gear body, and a drive body as viewed from a direction different from that of FIG.
  • FIG. 5 is an enlarged perspective view which shows the lock operation unit.
  • FIG. 15 to 18 show the operation of the blade opening / closing device, and this figure is a rear view showing an initial state of the drive mechanism. It is a rear view which shows the state of the drive mechanism immediately after the closing operation of an opening / closing blade is started.
  • FIG. 15 is a rear view showing a state in which the opening / closing blades are closed and the connecting shaft of the driving body is in contact with the brake lever.
  • FIG. 16 is a rear view showing a state in which the opening / closing blades are closed, the drive body is decelerated by the brake lever, and the unlocked body is pressed by the pressing shaft of the brake lever. It is a rear view which shows the state of the drive mechanism at the time of opening operation of an opening / closing vane. It is an enlarged perspective view which shows the lock operation unit which concerns on a modification.
  • FIG. 5 is an enlarged perspective view showing a lock operation unit according to a modified example as viewed from a direction different from that of FIG.
  • FIG. 22 to 26 show the operation of the blade opening / closing device using the lock operation unit according to the modified example, and this figure is a rear view showing the initial state of the drive mechanism. It is a rear view which shows the state of the drive mechanism immediately after the closing operation of an opening / closing blade is started.
  • FIG. 22 is a rear view showing a state in which the opening / closing blades are closed and the connecting shaft of the driving body is in contact with the brake lever.
  • FIG. 23 is a rear view showing a state in which the opening / closing blades are closed, the drive body is decelerated by the brake lever, and the release arm is pressed by the pressing shaft of the brake lever.
  • FIG. 22 to 26 show the operation of the blade opening / closing device using the lock operation unit according to the modified example, and this figure is a rear view showing the initial state of the drive mechanism. It is a rear view which shows the state of the drive mechanism immediately after the closing operation of an opening / closing blade is started.
  • FIG. 22 is a rear view
  • FIG. 24 is a rear view showing a state in which the release arm and the holding lever are rotated to the lock holding position following FIG. 24. It is a rear view which shows the state of the drive mechanism at the time of opening operation of an opening / closing vane.
  • a structural example of the link is shown together with FIGS. 28 and 29, and this figure is a front view showing a longitudinal fiber prepreg and a short fiber prepreg. It is a perspective view of the link which shows the prepreg in a separated state. It is a perspective view of a link. It is a block diagram of an image pickup apparatus.
  • the present technology imaging device is applied to a still camera
  • the present technology blade opening / closing device is applied to a focal plane shutter provided in this still camera.
  • the scope of application of this technology is not limited to still cameras and focal plane shutters provided in still cameras, and is provided in, for example, various image pickup devices incorporated in video cameras and other devices, and these image pickup devices. It can be widely applied to various blade opening / closing devices such as irises.
  • the directions of front, back, up, down, left and right are shown in the direction seen by the photographer when shooting with the still camera. Therefore, the subject side is the front side and the photographer side is the rear side.
  • the lens group shown below may include one composed of a single or a plurality of lenses, these single or a plurality of lenses, and other optical elements such as an iris.
  • the image pickup apparatus 1 is composed of, for example, required parts arranged inside and outside a horizontally long flat housing 2.
  • the image pickup device 1 may be a device in which the interchangeable lens 200 can be attached and detached.
  • a flash 3 is provided on the front surface of the housing 2.
  • a shutter button 4, a zoom switch 5, and a power button 6 are provided on the upper surface of the housing 2 (see FIGS. 1 and 2).
  • a display 7, various operation units 8, 8, ..., And a finder 9 are provided on the rear surface of the housing 2.
  • an optical system 10 having a lens group, an optical element, and the like, and a blade opening / closing device (focal plane shutter) 11 for controlling the amount of light taken in by the optical system 10 are provided.
  • An image sensor 12 that photoelectrically converts the light taken in through the blade opening / closing device 11 is arranged in order from the front side.
  • the blade opening / closing device 11 has a base body 13, a holding plate 14, an opening / closing blade 15, links 16, 16 and a drive mechanism 17, and is arranged on the front side of the image pickup element 12 (see FIGS. 4 to 6).
  • the base body 13 is formed, for example, in a horizontally long rectangular shape, and has a rectangular opening 13a penetrating in the front-rear direction (see FIGS. 4 and 5).
  • the opening 13a is one size larger than the effective incident region of light on the image pickup surface of the image pickup device 12.
  • the effective incident region of light on the imaging surface is a region in which light captured by the optical system 10 and necessary for generating an image is incident.
  • the lower portion of the opening 13a in the base body 13 is provided as a holding portion 18 serving as a holding region in which the opening / closing blade 15 is held in the open position, and one side portion of the opening 13a in the base body 13 is used as the mounting portion 19. It is provided.
  • the image sensor 12 is arranged on the rear side of the base body 13.
  • Support pins 19a and 19a projecting forward are provided at the lateral ends of the mounting portion 19 so as to be separated from each other in the vertical direction.
  • a shaft moving hole 19b is formed in the mounting portion 19, and the shaft moving hole 19b is formed in a substantially arc shape.
  • the holding plate 14 is formed in substantially the same size and shape as the base body 13 and has a through hole 14a.
  • the holding plate 14 is attached to the base body 13 from the front side with the opening / closing blade 15 sandwiched between them.
  • the opening 13a is located directly behind the transmission hole 14a.
  • a relief hole 14b is formed in the holding plate 14, and the relief hole 14b is formed in an arc shape.
  • the opening / closing blade 15 is composed of a plurality of sheet-shaped sectors 15a, 15a, ... (See FIG. 5).
  • a combination of an electronic curtain that functions as a front curtain by controlling the image sensor 12 and an opening / closing blade 15 that is provided as a mechanical structure and functions as a rear curtain is used. It has a so-called electronic front curtain shutter configuration.
  • the sectors 15a, 15a, ... are formed in a horizontally long shape, and for example, four sectors are provided. At least a part of the sectors 15a, 15a, ...
  • the opening / closing blade 15 is positioned so as to overlap each other in the thickness direction.
  • the sectors 15a, 15a, ... Are rotatably connected to both links 16 and 16, respectively.
  • the links 16 and 16 are formed in a sheet shape and function as parallel links. Support holes 16a and 16a are formed in the links 16 and 16 at one end in the longitudinal direction, respectively. One link 16 is formed with an elongated connecting hole 16b at a portion closer to one end in the longitudinal direction.
  • the links 16 and 16 have the support pins 19a and 19a of the base body 13 inserted into the support holes 16a and 16a, respectively, and are rotated with respect to the base plate 13 and the holding plate 14 with the support pins 19a and 19a as fulcrums.
  • the links 16 and 16 are rotated with respect to the base plate 13 and the holding plate 14 while maintaining a parallel state by the driving force of the driving mechanism 17.
  • the links 16 and 16 are rotated, the sectors 15a, 15a, ... Are moved (traveled) substantially in the vertical direction.
  • the movement amounts of the sectors 15a, 15a, ... are different, the overlapping area is changed, and the opening position (see FIG. 6) for opening the opening 13a of the base body 13 and the closing position for closing the opening 13a (see FIG. 7). ) Is opened and closed.
  • the blade opening / closing device 11 can be sufficiently miniaturized in the moving direction of the opening / closing blades 15. An opening 13a having a large size can be formed.
  • a sheet (not shown) having a light transmitting hole located corresponding to the opening 13a is arranged between the opening / closing blade 15 and the front surface of the base body 13 and between the opening / closing blade 15 and the rear surface of the holding plate 14, respectively. , These sheets facilitate the operation of the opening / closing blade 15.
  • the drive mechanism 17 is configured by arranging the required parts on the arrangement base 20 (see FIGS. 5, 8 and 9).
  • the arrangement base 20 is formed in a vertically long plate shape facing the front-rear direction.
  • a shaft operating hole 20a is formed in the arrangement base 20 at a position near the lower end (see FIGS. 8 and 9).
  • the arrangement base 20 is attached to the attachment portion 19 of the base body 13 from the rear.
  • a spring support shaft 21, a rotor shaft 22, a drive shaft 23, and a lock shaft 24 are attached to the arrangement base 20.
  • the spring support shaft 21, the rotor shaft 22, the drive shaft 23, and the lock shaft 24 are respectively projected rearward from the arrangement base 20.
  • a brake support shaft 25 and a stopper 26 are attached to the rear surface of the arrangement base 20, and the brake support shaft 25 and the stopper 26 are located around the shaft operating hole 20a.
  • the drive mechanism 17 is provided with a magnetic drive unit 27.
  • the magnetic drive unit 27 has a mounting plate 28, a first yoke 29, a second yoke 30, a coil 31, and a magnet 32.
  • the mounting plate 28 is oriented in the front-rear direction, and the first yoke 29 and the second yoke 30 are attached to the mounting plate 28.
  • the first yoke 29 is formed with magnet arrangement holes 29a penetrating the front and rear.
  • the first yoke 29 is attached to the upper half of the rear surface of the placement base 20.
  • the second yoke 30 has a base portion 30a formed in a plate shape facing in the vertical direction and a core portion 30b protruding downward from the base portion 30a, and the base portion 30a is located above the first yoke 29. ..
  • the coil 31 is arranged in a state of being wound around the core portion 30b, and functions as a stator.
  • the magnet 32 functions as a rotor and is formed in a cylindrical shape with the axial direction in the front-rear direction (see FIGS. 10 and 11).
  • a rotor gear 33 is attached to one end surface of the magnet 32 in the axial direction.
  • the magnet 32 and the rotor gear 33 are supported by the rotor shaft 22, and are integrally rotatable around the rotor shaft 22 as a fulcrum.
  • the magnet 32 is inserted into the magnet placement hole 29a and placed in a state where the first yoke 29 is attached to the placement base 20.
  • the magnet 32 and the rotor gear 33 are integrally rotated in a direction corresponding to the direction of the current.
  • the magnet 32 and the rotor gear 33 are rotated in synchronization with the drive body 34.
  • the drive body 34 has a drive gear 35, a drive lever 36, and a supported shaft portion 37, and is rotatable.
  • the drive gear 35 is a spur gear.
  • the drive gear 35 is provided with a spring hooking portion 35a by projecting rearward from a part of the outer peripheral portion.
  • the drive lever 36 is formed in a plate shape having a predetermined shape, and has a coupling base 36a extending in one direction and a protrusion 36b protruding from the central portion in the longitudinal direction of the coupling base 36a.
  • a through hole (not shown) is formed at one end of the coupling base 36a in the longitudinal direction.
  • the protrusion 36b projects in a direction orthogonal to the coupling base 36a.
  • a connecting shaft 38 projecting forward is attached to the other end of the coupling base 36a in the longitudinal direction.
  • a return shaft 39 projecting forward is attached to the protrusion 36b.
  • a notch is formed at the other end of the coupling base 36a in the longitudinal direction, and the locked portion 36c is formed by this notch.
  • the edge of the coupling base 36a on the locked portion 36c side is formed as a sliding inclined edge 36d.
  • One end of the coupling base 36a of the drive lever 36 is coupled to the rear surface of the drive gear 35, and the through hole coincides with the center hole of the drive gear 35.
  • the coupling shaft 38 and the return shaft 39 are located on the outer peripheral side of the drive gear 35.
  • the supported shaft portion 37 has a cylindrical portion 37a formed in a cylindrical shape whose axial direction is the front-rear direction, and a flange portion 37b protruding outward from one end portion in the axial direction of the tubular portion 37a. There is.
  • the supported shaft portion 37 has a flange portion 37b coupled to one end of the coupling base 36a and is positioned coaxially with the drive gear 35.
  • the drive body 34 is urged in one direction in the rotation direction by the traveling spring 40.
  • the traveling spring 40 is, for example, a torsion coil spring, and is supported by a tubular portion 37a of a supported shaft portion 37.
  • One end of the traveling spring 40 is engaged with, for example, a part of the mounting plate 28 in the magnetic drive unit 27, and the other end is engaged with the spring hooking portion 35a of the drive gear 35.
  • the drive body 34 is supported by the drive shaft 23 and is rotatable around the drive shaft 23 as a fulcrum.
  • the drive body 34 is urged in one rotation direction by the traveling spring 40, and the drive gear 35, the drive lever 36, and the supported shaft portion 37 are integrated and one rotation is performed by the urging force (driving force) of the traveling spring 40. It is made rotatable in the direction of movement.
  • the drive body 34 is located between the first rotating end, which is the rotating end in the direction opposite to the urging force of the traveling spring 40, and the second rotating end, which is the rotating end in the direction of the urging force of the traveling spring 40. It is rotated.
  • the drive gear 35 is meshed with the rotor gear 33 of the magnetic drive unit 27. Therefore, the rotor 32 and the rotor gear 33 of the magnetic drive unit 27 are rotated in synchronization with the drive body 34 in the opposite direction.
  • the drive mechanism 17 is provided with a lock operation unit 41 (see FIGS. 8 and 9).
  • the locking operation unit 41 has an unlocking body 42 and a locking member 43 (see FIGS. 12 and 13).
  • the unlocking body 42 has an unlocking base 44 and a suction piece 45, and is rotatable between a lock holding position and an unlocking position.
  • the release base 44 has a plate-shaped base surface portion 46 that faces substantially vertically, a first support surface portion 47 that is bent upward with respect to the base surface portion 46, and a second support surface portion that is bent upward with respect to the base surface portion 46.
  • the first support surface portion 47 and the second support surface portion 48 are positioned so as to face each other in the front-rear direction, and the first support surface portion 47 is located behind the second support surface portion 48.
  • a part of the first support surface portion 47 is provided as a first spring receiving portion 47a projecting laterally from the base surface portion 46, and a part of the second support surface portion 48 projects laterally from the base surface portion 46. It is provided as a second spring receiving portion 48a, and the first spring receiving portion 47a and the second spring receiving portion 48a are positioned so as to face each other in the front-rear direction.
  • the other part of the second support surface portion 48 is projected from the base surface portion 46 in the direction opposite to the second spring receiving portion 48a on the side, and this protruding portion is provided as the release receiving portion 48b.
  • the first support surface portion 47 is provided with a regulation protrusion 48c protruding downward from the release receiving portion 48b.
  • a substantially cylindrical first spring support member 49 and a second spring support member 50 are attached to the first spring receiving portion 47a and the second spring receiving portion 48a, respectively.
  • the unlocking spring 51 is supported by the first spring supporting member 49.
  • the unlocking spring 51 is, for example, a torsion coil spring, one end of which is engaged with a spring support shaft 21 attached to the arrangement base 20, and the other end of which is engaged with a first support surface portion 47.
  • the suction piece 45 is formed of a magnetic metal material and is fixed to the base surface portion 46 of the release base 44 via the fixed shaft 52.
  • the suction piece 45 is located on the upper surface side of one end portion of the base surface portion 46 in the left-right direction.
  • the lock member 43 is orthogonal to the supported plate portion 53 and the supported plate portion 53 located on the front side of the release base 44 facing the second support surface portion 48, and the base surface portion 46 is located on the lower side of the release base 44. It has a pressed plate portion 54 positioned so as to face the front end portion. A shaft insertion hole 53a is formed in the supported plate portion 53 through the front and rear. The supported plate portion 53 is provided with a lock portion 53b protruding downward. The lock member 43 is rotatable between a locked position and a non-locked position.
  • a lock spring 55 is supported by the second spring support member 50.
  • the spring force of the lock spring 55 is smaller than the spring force of the unlock spring 51.
  • the lock spring 55 is, for example, a torsion coil spring, one end of which is engaged with the second support surface portion 48 of the release base 44, and the other end of which is engaged with the supported plate portion 53 of the lock member 43.
  • the lock operation unit 41 is inserted into the lock shaft 24 by inserting the lock shaft 24 attached to the arrangement base 20 into the shaft insertion hole 53a of the lock member 43, the first spring support member 49, and the second spring support member 50. It is supported, and the unlocking body 42 and the locking member 43 are individually rotatable around the lock shaft 24 as a fulcrum.
  • the lock release body 42 is urged by the lock release spring 51 in a direction in which the base surface portion 46 approaches the pressed portion plate 54 of the lock member 43.
  • the lock member 43 is urged by the lock spring 55 in the direction in which the pressed portion plate 54 approaches the base surface portion 46. Therefore, the urging directions of the lock release spring 51 and the lock spring 55 are opposite to each other in the rotation direction of the lock operation unit 41, and a force other than the urging force is applied to the lock release body 42 and the lock member 43 in the rotation direction.
  • the pressed plate portion 54 of the lock member 43 is pressed against the regulation protrusion 48c of the unlocking body 42.
  • the electromagnet 56 has a magnetic force generating portion 57 formed in a bifurcated shape and a pair of coil portions 58, 58.
  • the magnetic force generating portion 57 is provided as a pair of suction portions 57a and 57a in which bifurcated portions are lined up in the front-rear direction, and the coil portions 58 and 58 are wound around the suction portions 57a and 57a, respectively.
  • the electromagnet 56 is attached to, for example, the mounting plate 28.
  • the unlocked body 42 is positioned so that the tip surfaces of the suction portions 57a and 57a face the upper surface of the suction piece 45.
  • the suction force on the suction piece 45 disappears when the coil portions 58 and 58 are energized, and the suction force on the suction piece 45 is generated when the energization on the coil portions 58 and 58 is stopped.
  • the drive mechanism 17 is provided with a brake lever 59 (see FIGS. 8 and 9).
  • the brake lever 59 is formed in a substantially V shape and is rotatable around a brake support shaft 25 attached to the arrangement base 20 as a fulcrum. The brake lever 59 is rotated between the deceleration start position at which the drive body 34 starts deceleration and the rotation stop position at which the rotation is stopped.
  • the V-shaped bent portion of the brake lever 59 is supported by the brake support shaft 25.
  • the brake lever 59 is provided with a portion extending from the portion supported by the brake support shaft 25 to one side as a brake arm 60, and a portion extending from the portion supported by the brake support shaft 25 to the other side as an action arm 61. ..
  • a pressing shaft 62 is rotatably supported at the tip of the acting arm 61, for example.
  • the brake lever 59 is supported by a support pin 64 via a pressurizing spring 63 on the brake support shaft 25. Therefore, the brake lever 59 is supported by the pressurization spring 63 in a state where a constant load is applied to the arrangement base 20, and a rotational force larger than the frictional force with the arrangement base 20 generated by the pressurization spring 63 is applied. At that time, it is rotated with respect to the arrangement base 20.
  • the first yoke 29 and the second yoke 30 of the magnetic drive unit 27 are It is attached to the upper half of the placement base 20.
  • the magnet 32 is inserted into the magnet arrangement hole 29a of the first yoke 29, and the connecting shaft 38 and the return shaft 39 attached to the drive lever 36 are forward from the shaft operation hole 20a of the arrangement base 20. (See FIG. 5).
  • the arrangement base 20 is attached to the mounting portion 19 of the base body 13 from the rear, and the connecting shaft 38 projects forward from the shaft moving hole 19b of the base body 13 to the escape hole 14b of the holding plate 14. Will be inserted.
  • the connecting shaft 38 is inserted into a connecting hole 16b formed in one of the links 16. Therefore, when the drive body 34 is rotated, the connecting shaft 38 is moved, the links 16 and 16 are rotated while maintaining the parallel state, and the sectors 15a, 15a, ... ⁇ ⁇ Is moved in the vertical direction.
  • the coil 31 is not energized, the magnetic drive unit 27 is not generating a driving force, and the rotation of the magnet 32 is stopped. Has been made.
  • the electromagnet 56 is not energized, and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating portion 57, and the suction piece 45 is attracted by the suction portions 57a and 57a. Therefore, the unlocking body 42 is held at the lock holding position.
  • the lock member 43 is given an urging force in the direction in which the pressed portion plate 54 approaches the base surface portion 46 by the lock spring 55, and the pressed plate portion 54 presses against the regulation protrusion 48c of the unlocked body 42.
  • the lock member 43 is held at the lock position.
  • the image sensor 12 is in a closed state (non-exposure state) in which light is not incident by the electronic curtain (front curtain).
  • the brake lever 59 In the initial state, the brake lever 59 is held at the deceleration start position, the brake arm 60 is separated from the connecting shaft 38 attached to the drive lever 36 of the drive body 34, and the pressing shaft 62 attached to the action arm 61 The release base 44 is separated from the release receiving portion 48b of the second support surface portion 48.
  • the opening / closing blade 15 can be operated by both the driving force of the magnetic driving unit 27 and the driving force of the traveling spring 40, and the opening / closing blade 15 can be operated only by the driving force of the traveling spring 40. It is also possible to operate the opening / closing blade 15. An example in which the opening / closing blade 15 is rotated from the open position to the closed position by both the driving force of the magnetic driving unit 27 and the driving force of the traveling spring 40 will be described below. Further, the operation from the closed position to the open position of the opening / closing blade 15 is performed by the driving force of the magnetic driving unit 27.
  • the electromagnet 56 When the electromagnet 56 is energized, the operation of the opening / closing blade 15 from the open position to the closed position is started.
  • the electronic curtain is controlled according to the operating speed of the opening / closing blade 15 in a state where a slit is formed between the electronic curtain and the opening / closing blade 15. Light is incident on the image pickup device 12 through the formed slit to perform exposure.
  • the electromagnet 56 When the electromagnet 56 is energized, the magnetic force generated in the magnetic force generating unit 57 disappears, and the suction pieces 45 are released from being attracted by the suction parts 57a and 57a. Therefore, the unlocking body 42 is rotated from the lock holding position to the unlocked position by the urging force of the unlocking spring 51.
  • the unlocked body 42 rotated toward the unlocked position is partially attached to the arrangement base 20 or comes into contact with a rotation restricting portion (not shown) formed on the arrangement base 20 to stop rotation and the unlocked position. Is held in.
  • the lock member 43 that has been rotated integrally with the unlocked body 42 toward the unlocked position is stopped rotating along with the unlocked body 42 and is held in the unlocked position.
  • the drive body 34 is rotated from the first rotation end to the second rotation by the urging force of the traveling spring 40. It is rotated toward the moving end, and the driving force generated by the urging force of the traveling spring 40 is transmitted to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 is closed from the open position as the driving body 34 rotates. It is operated toward the position.
  • the coil 31 of the magnetic drive unit 27 is energized at the same time as the electromagnet 56 is energized, and the magnet 32 functioning as a rotor and the rotor gear 33 are integrally rotated in the direction opposite to the drive body 34, and the magnetic drive unit is energized.
  • the driving force generated in 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34. Therefore, the opening / closing blade 15 is operated by both the driving force generated by the magnetic driving unit 27 and the driving force generated by the urging force of the traveling spring 40, and is operated at high speed from the open position to the closed position. ..
  • the coil 31 is energized, and the opening / closing blade 15 is further operated toward the closed position (see FIG. 16).
  • the magnetic drive unit 27 and the drive body 34 are continuously rotated in opposite directions in synchronization with each other, and the drive body 34 is further rotated toward the second rotation end by the urging force of the traveling spring 40.
  • the drive body 34 further rotated toward the second rotation end is brought into contact with the brake arm 60 of the brake lever 59 whose connecting shaft 38 attached to the drive lever 36 is held at the deceleration start position, and the brake lever 59 is pressed against the connecting shaft 38 and is rotated from the deceleration start position to the rotation stop position against the frictional force. Therefore, the rotation speed of the drive body 34 is gradually reduced by the brake lever 59 as it approaches the second rotation end, and the operating speed of the opening / closing blade 15 is also gradually reduced as it approaches the closed position.
  • the pressing shaft 62 is brought into contact with the unlocking receiving portion 48b of the unlocking body 42 by the rotation of the brake lever 59.
  • the pressing shaft 62 of the brake lever 59 comes into contact with the unlocking receiving portion 48b of the unlocking body 42, the energization of the electromagnet 56 is stopped. Therefore, the magnetic force is generated again in the magnetic force generating unit 57.
  • the magnetic drive unit 27 and the drive body 34 are synchronously rotated in opposite directions, the brake lever 59 is pressed by the connecting shaft 38 and continuously rotated, and the brake arm 60 is attached to the stopper 26 attached to the arrangement base 20. The rotation of the brake lever 59 is stopped in contact with the brake lever 59 (see FIG. 17).
  • the brake lever 59 is held in the rotation stop position by coming into contact with the stopper 26, and the rotation of the drive body 34, the magnet 32, and the rotor gear 33 is stopped when the rotation of the brake lever 59 is stopped, and the drive body 34 is moved. It is held at the second rotating end. At this time, the energization of the coil 31 of the magnetic drive unit 27 is stopped.
  • the opening / closing blade 15 operated by the rotation of the driving body 34 reaches the closing position and from the opening position to the closing position of the opening / closing blade 15. Is completed, and the opening 13a of the base body 13 is closed.
  • the energization of the electromagnet 56 is stopped and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating unit 57, the suction piece 45 is attracted by the suction parts 57a and 57a, the unlocking body 42 is rotated to the lock holding position, and the lock member 43 returns to the initial state and the lock member 43 is in the lock position. It is rotated to return to the initial state.
  • the operation of the opening / closing blade 15 from the closed position to the open position is started by energizing the coil 31 of the magnetic drive unit 27 in the opposite direction to the previous one (see FIG. 18).
  • the driving force generated in the magnetic driving unit 27 is transmitted from the rotor gear 33 to the driving body 34, and the driving body 34 is subjected to the second force against the urging force of the traveling spring 40. It is rotated from the rotating end to the first rotating end to return to the initial state, and the driving force generated in the magnetic drive unit 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 Is operated from the closed position to the open position.
  • the connecting shaft 38 of the drive body 34 is separated from the brake arm 60, but the return shaft 39 of the drive body 34 brakes.
  • the arm 60 is contacted from the direction opposite to the contact direction of the connecting shaft 38, and the brake lever 59 is rotated from the rotation stop position to the deceleration start position by the return shaft 39 to return to the initial state.
  • the brake lever 59 is rotated from the rotation stop position to the deceleration start position, so that the pressing shaft 62 is separated from the release receiving portion 48b of the release base 44.
  • the lock member 43 When the drive body 34 is rotated from the second rotating end to the first rotating end, the lock member 43 is rotated from the unlocked position to the locked position, and the sliding inclined edge 36d of the drive lever 36d. Is slid on the lock portion 53b of the lock member 43, and the lock member 43 is once rotated against the urging force of the lock spring 55. Further, when the drive body 34 is rotated to the first rotation end, the sliding inclined edge 36d gets over the lock portion 53b, and the lock member 43 is rotated by the urging force of the lock spring 55 to lock the locked portion 36c. Engaged with the portion 53b, the drive body 34 is restricted from rotating against the urging force of the traveling spring 40, is locked, and is held at the first rotating end to return to the initial state.
  • the image pickup apparatus 1 has a so-called electronic front curtain shutter configuration by combining an electronic curtain that functions as a front curtain and an opening / closing blade 15 that is provided as a mechanical structure and functions as a rear curtain.
  • Some imaging devices use an electronic shutter that electronically performs both the front curtain and the rear curtain.
  • the front curtain is performed by clearing the electric charge
  • the rear curtain is performed by continuous reading.
  • a problem called rolling shutter distortion occurs in which an image of a moving subject is distorted.
  • some imaging devices use a shutter that mechanically performs both the front curtain and the rear curtain. In this case, both the drive mechanism of the front curtain and the drive mechanism of the rear curtain are required. , There is a risk that the size of the image pickup device will increase and the number of parts will increase.
  • the electronic front curtain shutter by configuring the electronic front curtain shutter by combining the electronic curtain and the opening / closing blade 15 like the image pickup device 1, the large size of the image pickup device 1 and the increase in the number of parts are suppressed, and the rolling shutter distortion is generated. It becomes possible to suppress.
  • the traveling speed of the opening / closing blade 15 is lower than the case where the opening / closing blade 15 is operated by both the driving force of the magnetic drive unit 27 and the driving force of the traveling spring 40, but the coil 31 is energized. Power consumption can be reduced as much as it is not performed.
  • a drive unit 27 a drive body 34 having a drive gear 35 meshed with a rotor gear 33, and a traveling spring 40 that applies an urging force to one of the opening / closing blades 15 in the opening / closing direction via the drive body 34.
  • the opening / closing blade 15 is operated in the opening / closing direction as the drive body 34 rotates.
  • the opening / closing operation of the opening / closing blade 15 can be performed by the driving force of the magnetic driving unit 27 generated by energizing the coil 31 and the urging force of the traveling spring 40 in the driving body 34, and the magnetic driving unit 27 can be opened / closed.
  • the opening / closing operation of the opening / closing blade 15 can be performed by reducing the driving force generated in the above, and the traveling speed of the opening / closing blade 15 can be increased without increasing the size of the magnetic drive unit 27 and increasing the power consumption. it can.
  • the magnetic drive unit 27 and the drive body 34 are arranged side by side in the same direction as the opening / closing direction of the opening / closing blade 15, that is, in the direction orthogonal to the optical axis direction.
  • the magnetic drive unit 27 and the drive body 34 are arranged so as not to line up in the traveling direction of the light passing through the opening 13a, it is possible to reduce the size of the image pickup device 1 and the blade opening / closing device 11 in the traveling direction of the light. ..
  • the drive body 34 is provided with a supported shaft portion 37 that functions as a rotation fulcrum portion, a torsion coil spring is used as the traveling spring 40, and the traveling spring 40 is supported by the supported shaft portion 37.
  • the drive body 34 can be miniaturized and the magnetic drive unit 27 can be miniaturized. Energy efficiency can be improved.
  • a locking member 43 having a locking portion 53b and operating between a locked position and a non-locking position is provided, a locked portion 36c is formed on the drive body 34, and the urging force of the traveling spring 40 at the locked position The drive body 34 is locked to the lock member 43 by pressing the locked portion 36c against the lock portion 53b.
  • the locked portion 36c is pressed against the lock portion 53b by the urging force of the traveling spring 40, so that the initial position of the drive body 34 before the start of the opening / closing operation of the opening / closing blade 15 is determined, so that the initial position of the driving body 34 is stable. Therefore, stable opening / closing operation of the opening / closing blade 15 can be ensured.
  • the initial positions of the magnet 32 and the drive body 34 are such that the locked portion 36c of the drive body 34 is pressed against the lock portion 53b of the lock member 43 by the urging force of the traveling spring 40. Is defined by.
  • the locked portion 36c of the drive body 34 is pressed against the lock portion 53b of the lock member 43 by the urging force of the traveling spring 40 to determine the initial positions of the magnet 32 and the drive body 34. Therefore, the magnetizing direction of the magnet 32 and the shape of the first yoke 29 do not affect the initial positions of the magnet 32 and the drive body 34. As a result, high positional accuracy regarding the initial positions of the magnet 32 and the drive body 34 can be ensured, and stable performance of the drive mechanism 17 regarding the opening / closing operation of the opening / closing blade 15 can be ensured.
  • unlocking body 42 which is operated between the lock holding position and the unlocking position and operates the lock member 43 between the locked position and the unlocked position, and the unlocking body 42 are held at the lock holding position by being attracted to each other.
  • An electromagnet 56 and an unlocking spring 51 that urges the unlocking body 42 toward the unlocking position are provided.
  • the unlocking body 42 is held in the lock holding position by the electromagnet 56, and the unlocking body 42 is locked from the lock holding position by the urging force of the unlocking spring 51 by releasing the action of the electromagnet 56 on the unlocking body 42. It becomes possible to operate toward the release position, and the operation between the lock holding position and the unlock position of the unlock body 42 can be reliably performed by a simple mechanism.
  • a brake lever 59 is provided to reduce the rotation speed of the drive body 34 as it approaches the rotation end in a predetermined rotation range of the drive body 34.
  • the brake lever 59 is made rotatable, and the brake lever 59 is provided with a brake arm 60 pressed by the drive body 34 and an action arm 61 for pressing the unlocked body 42, and the brake arm 60 by the drive body 34 is provided.
  • the lock release body 42 is pressed by the action arm 61, the unlock body 42 is operated from the unlock position to the lock holding position, and the lock member 43 is operated from the unlock position to the lock position. Will be done.
  • the brake lever 59 decelerates the drive body 34 and operates the unlocked body 42 from the unlocked position to the lock holding position. Therefore, the brake lever 59 decelerates the drive body 34 and operates the unlocked body 42. It is not necessary to provide a separate mechanism for each, and the structure can be simplified and the operation can be speeded up.
  • a brake lever 59 that reduces the rotation speed of the drive body 34 when the image pickup device 1 and the blade opening / closing device 11 are rotated from the first rotation position to the second rotation position, and a brake lever 59.
  • the lock member 43 includes a lock member 43 that locks the drive body 34 at the lock position, and an unlock spring 51 that operates the lock member 43 from the lock position to the unlocked position when the drive body 34 is unlocked. By applying the rotational force of the brake lever 59 to the 43, the lock member 43 is operated from the unlocked position to the locked position.
  • the rotation of the drive body 34 is performed not only by the force applied by the brake lever 59 but also by the force applied by the lock member 43, the deceleration effect of the drive body 34 is large and the deceleration of the drive body 34 is efficient. And it can be done quickly.
  • a magnetic drive unit 27 having a coil 31 to which a drive current is supplied and a magnet 32 that is rotated by energizing the coil 31 is provided, and is driven by at least one of the drive body 34 or the magnetic drive unit 27.
  • the opening / closing blade 15 is operated.
  • the opening / closing blade 15 is operated in the opening / closing direction by the driving force of at least one of the magnetic drive unit 27 and the driving body 34, the degree of freedom regarding the operation control of the opening / closing blade 15 is improved, and the speed of the opening / closing blade 15 is photographed. It can be easily changed according to the above.
  • the magnetic drive unit 27 is provided with a rotor gear 33 that is rotated with the rotation of the magnet 32, and the drive body 34 is provided with a drive gear 35 that is meshed with the rotor gear 33, via the drive body 34.
  • the opening / closing blade 15 is provided with a traveling spring 40 that applies an urging force to one side in the opening / closing direction.
  • the opening / closing blade 15 can be operated in one direction in the opening / closing direction by the driving force generated by the rotation of the magnet 32 in the magnetic driving unit 27 and the driving force generated by the urging force of the traveling spring 40. It is possible to increase the traveling speed of the opening / closing blade 15 without increasing the size and power consumption of the magnet.
  • the locking operation unit 41A has an unlocking body 42A and a locking member 43 (see FIGS. 19 and 20).
  • the unlocking body 42A has an unlocking base 44A and a suction piece 45, and the unlocking base 44A is composed of a holding lever 71 and an unlocking arm 72.
  • the holding lever 71 and the release arm 72 are respectively rotatable separately between the lock holding position and the unlocking position with the coaxial as a fulcrum.
  • the holding lever 71 has a plate-shaped base surface portion 73 that faces substantially in the vertical direction and a first support surface portion 74 that is bent upward with respect to the base surface portion 73. A part of the first support surface portion 74 is provided as a first spring receiving portion 74a protruding laterally from the base surface portion 73.
  • a substantially cylindrical first spring support member 75 is attached to the first spring receiving portion 74a.
  • a return spring 76 is supported by the first spring support member 75 on the front side of the first spring receiving portion 74a. One end of the return spring 76 is engaged with the first support surface portion 74.
  • the suction piece 45 is fixed to the base surface portion 73 and is located on the upper surface side of one end portion in the left-right direction of the base surface portion 73.
  • the release arm 72 is bent rearward with respect to the second support surface portion 77 and the second support surface portion 77 facing in the front-rear direction toward the second support surface portion 77 with respect to the spring hooking surface portion 78 and the spring hooking surface portion 78. It has a pressed holding surface portion 79.
  • the second support surface portion 77 is positioned so as to face the first support surface portion 74 of the holding lever 71 in the front-rear direction, and the second support surface portion 77 is located in front of the first support surface portion 74.
  • a part of the second support surface portion 77 is provided as a second spring receiving portion 77a located so as to face the first spring receiving portion 74a of the holding lever 71 in the front-rear direction.
  • the other part of the second support surface portion 77 is projected in the direction opposite to the second spring receiving portion 77a on the side of the base surface portion 73, and this protruding portion is provided as the release receiving portion 77b.
  • the second support surface portion 77 is provided with a regulating protrusion 77c protruding downward.
  • both ends of the return spring 76 are engaged with the first support surface portion 74 and the spring hooking surface portion 78, respectively, and the return spring 76 brings the base surface portion 73 and the pressing surface portion 79 closer to the holding lever 71 and the release arm 72. Is given the urging power of. As a result, the pressing surface portion 79 is abutted against the base surface portion 73 in a state in which the holding lever 71 and the release arm 72 are not subjected to a force in a direction opposite to the urging force of the return spring 76.
  • a substantially cylindrical second spring support member 80 is attached to the second spring receiving portion 77a.
  • the second spring support member 80 and the first spring support member 75 are coupled between the first spring receiving portion 74a and the second spring receiving portion 77a.
  • the unlocking spring 81 is supported on the rear side of the second spring receiving portion 77a on the second spring supporting member 80.
  • the unlocking spring 81 is, for example, a torsion coil spring, one end of which is engaged with a spring support shaft 21 attached to the arrangement base 20, and the other end of which is engaged with a second support surface portion 77.
  • the spring force of the unlock spring 81 is larger than the spring force of the return spring 76.
  • the lock member 43 is orthogonal to the supported plate portion 53 and the supported plate portion 53 located on the front side of the release arm 72 facing the second support surface portion 77, and the base surface portion 73 is located on the lower side of the release arm 72. It has a pressed plate portion 54 positioned so as to face the front end portion.
  • a substantially cylindrical third spring support member 82 is attached to the supported plate portion 53 of the lock member 43.
  • the lock spring 55 is supported on the front side of the second spring receiving portion 77a by the third spring supporting member 82.
  • the spring force of the lock spring 55 is smaller than the spring force of the unlock spring 81.
  • One end of the lock spring 55 is engaged with the spring support shaft 21 attached to the arrangement base 20, and the other end is engaged with the supported plate portion 53 of the lock member 43.
  • the lock shaft 24 attached to the arrangement base 20 is inserted into the shaft insertion hole 53a of the lock member 43, the first spring support member 75, the second spring support member 80, and the third spring support member 82.
  • the holding lever 71, the release arm 72, and the lock member 43 can be rotated separately with the lock shaft 24 as a fulcrum.
  • the release arm 72 is urged by the lock release spring 81 in a direction in which the pressing surface portion 79 contacts the base surface portion 73 of the holding lever 71, and the holding lever 72.
  • the 71 is urged in the same direction as the release arm 72 by applying the urging force of the unlock spring 81 via the release arm 72. Therefore, the holding lever 71 and the release arm 72 are integrally rotatable in the direction in which the urging force of the lock release spring 81 is applied.
  • the holding lever 71 is urged by the return spring 76 in the direction in which the base surface portion 73 approaches the holding surface portion 79 of the release arm 72, and the urging direction of the holding lever 71 by the return spring 76 is the lock release spring 81 with respect to the holding lever 71. It is in the opposite direction to the urging direction.
  • the lock member 43 is urged by the lock spring 55 in the direction in which the pressed plate portion 54 approaches the base surface portion 73. Therefore, the urging directions of the lock release spring 81 and the lock spring 55 are opposite to each other in the rotation direction of the lock operation unit 41A, and a force other than the urging force is applied to the lock release body 42A and the lock member 43 in the rotation direction.
  • the unlocking body 42A and the locking member 43 are held in a state where the pressed plate portion 54 of the locking member 43 is pressed against the regulating protrusion 77c of the unlocking body 42A.
  • the coil 31 is not energized, the magnetic drive unit 27 is not generating a driving force, and the rotation of the magnet 32 is stopped. Has been made.
  • the electromagnet 56 is not energized, and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating portion 57, and the suction piece 45 is attracted by the suction portions 57a and 57a. Therefore, both the holding lever 71 and the releasing arm 72 of the unlocking body 42A are held at the locking holding position.
  • the lock member 43 is given an urging force in the direction in which the pressed portion plate 54 approaches the base surface portion 73 by the lock spring 55, and the pressed plate portion 54 is pressed against the regulation protrusion 77c of the release arm 72.
  • the lock member 43 is held in the locked position.
  • the image sensor 12 is in a closed state (non-exposure state) in which light is not incident by the electronic curtain (front curtain).
  • the brake lever 59 In the initial state, the brake lever 59 is held at the deceleration start position, the brake arm 60 is separated from the drive lever 36 of the drive body 34, and the pressing shaft 62 attached to the action arm 61 is the second release arm 72. It is separated from the release receiving portion 77b of the support surface portion 77.
  • the electromagnet 56 When the electromagnet 56 is energized, the operation of the opening / closing blade 15 from the open position to the closed position is started.
  • the electronic curtain is controlled according to the operating speed of the opening / closing blade 15 in a state where a slit is formed between the electronic curtain and the opening / closing blade 15. Light is incident on the image pickup device 12 through the formed slit to perform exposure.
  • the electromagnet 56 When the electromagnet 56 is energized, the magnetic force generated in the magnetic force generating unit 57 disappears, and the suction pieces 45 are released from being attracted by the suction parts 57a and 57a. Therefore, the holding lever 71 and the release arm 72 are integrally rotated by the urging force of the lock release spring 81 from the lock holding position to the lock release position.
  • the holding lever 71 and the release arm 72 that have been rotated toward the unlocked position rotate in contact with a rotation restricting portion (not shown) that is partially attached to the arrangement base 20 or formed on the arrangement base 20. Is stopped and held in the unlocked position.
  • the lock member 43 that has been rotated integrally with the unlocked body 42A toward the unlocked position is stopped rotating along with the unlocked body 42A and is held in the unlocked position.
  • the drive body 34 is rotated from the first rotation end to the second rotation by the urging force of the traveling spring 40. It is rotated toward the moving end, and the driving force generated by the urging force of the traveling spring 40 is transmitted to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 is closed from the open position as the driving body 34 rotates. It is operated toward the position.
  • the coil 31 of the magnetic drive unit 27 is energized at the same time as the electromagnet 56 is energized, and the magnet 32 functioning as a rotor and the rotor gear 33 are integrally rotated in the direction opposite to the drive body 34, and the magnetic drive unit is energized.
  • the driving force generated in 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34. Therefore, the opening / closing blade 15 is operated by both the driving force generated by the magnetic driving unit 27 and the driving force generated by the urging force of the traveling spring 40, and is operated at high speed from the open position to the closed position. ..
  • the coil 31 is energized, and the opening / closing blade 15 is further operated toward the closed position (see FIG. 23).
  • the magnetic drive unit 27 and the drive body 34 are continuously rotated in opposite directions in synchronization with each other, and the drive body 34 is further rotated toward the second rotation end by the urging force of the traveling spring 40.
  • the drive body 34 further rotated toward the second rotation end is brought into contact with the brake arm 60 of the brake lever 59 whose connecting shaft 38 attached to the drive lever 36 is held at the deceleration start position, and the brake lever 59 is pressed against the connecting shaft 38 and is rotated from the deceleration start position to the rotation stop position against the frictional force. Therefore, the rotation speed of the drive body 34 is gradually reduced by the brake lever 59 as it approaches the second rotation end, and the operating speed of the opening / closing blade 15 is also gradually reduced as it approaches the closed position.
  • the pressing shaft 62 is brought into contact with the release receiving portion 77b of the release arm 72 by the rotation of the brake lever 59.
  • the energization of the electromagnet 56 is stopped. Therefore, the magnetic force is generated again in the magnetic force generating unit 57.
  • the magnetic drive unit 27 and the drive body 34 are synchronously rotated in opposite directions, the brake lever 59 is pressed by the connecting shaft 38 and continuously rotated, and the brake arm 60 is attached to the stopper 26 attached to the arrangement base 20. The rotation of the brake lever 59 is stopped in contact with the brake lever 59 (see FIG. 24).
  • the brake lever 59 is held in the rotation stop position by coming into contact with the stopper 26, and the rotation of the drive body 34, the magnet 32, and the rotor gear 33 is stopped when the rotation of the brake lever 59 is stopped, and the drive body 34 is moved. It is held at the second rotating end. At this time, the energization of the coil 31 of the magnetic drive unit 27 is stopped.
  • the release receiving portion 77b of the release arm 72 is pressed by the pressing shaft 62 of the brake lever 59, and the release arm 72 is opposed to the urging force of the lock release spring 81. It is rotated from the unlocked position to the locked holding position.
  • the holding lever 71 and the release arm 72 are individually rotatable about the coaxial as a fulcrum, the release arm 72 is pressed when the release receiving portion 77b of the release arm 72 is pressed by the pressing shaft 62 of the brake lever 59. Although it is rotated to the lock holding position, the holding lever 71 is not rotated with the release arm 72.
  • the spring force of the return spring 76 is smaller than the spring force of the lock release spring 81, and the lock member 43 is slower than the rotation speed of the release arm 72 which is pressed and rotated by the pressing shaft 62 of the brake lever 59. Is rotated to the lock holding position.
  • the opening / closing blade 15 operated by the rotation of the driving body 34 reaches the closing position and from the opening position to the closing position of the opening / closing blade 15. Is completed, and the opening 13a of the base body 13 is closed.
  • the energization of the electromagnet 56 is stopped and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating unit 57, the suction piece 45 is attracted by the suction parts 57a and 57a, the unlocking body 42A is rotated to the lock holding position, and the lock member 43 returns to the initial state and the lock member 43 is in the lock position. It is rotated to return to the initial state.
  • the operation of the opening / closing blade 15 from the closed position to the open position is started by energizing the coil 31 of the magnetic drive unit 27 in the opposite direction to the previous one (see FIG. 26).
  • the driving force generated in the magnetic driving unit 27 is transmitted from the rotor gear 33 to the driving body 34, and the driving body 34 is subjected to the second force against the urging force of the traveling spring 40. It is rotated from the rotating end to the first rotating end to return to the initial state, and the driving force generated in the magnetic drive unit 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 Is operated from the closed position to the open position.
  • the connecting shaft 38 of the drive body 34 is separated from the brake arm 60, but the return shaft 39 of the drive body 34 brakes.
  • the arm 60 is contacted from the direction opposite to the contact direction of the connecting shaft 38, and the brake lever 59 is rotated from the rotation stop position to the deceleration start position by the return shaft 39 to return to the initial state.
  • the brake lever 59 is rotated from the rotation stop position to the deceleration start position, so that the pressing shaft 62 is separated from the release receiving portion 77b of the release arm 72.
  • the lock member 43 When the drive body 34 is rotated from the second rotating end to the first rotating end, the lock member 43 is rotated from the unlocked position to the locked position, and the sliding inclined edge 36d of the drive lever 36d. Is slid on the lock portion 53b of the lock member 43, and the lock member 43 is once rotated against the urging force of the lock spring 55. Further, when the drive body 34 is rotated to the first rotation end, the sliding inclined edge 36d gets over the lock portion 53b, and the lock member 43 is rotated by the urging force of the lock spring 55 to lock the locked portion 36c. Engaged with the portion 53b, the drive body 34 is restricted from rotating against the urging force of the traveling spring 40, is locked, and is held at the first rotating end to return to the initial state.
  • the unlocking body 42A is pressed by the holding lever 71 and the brake lever 59 that are attracted to the electromagnet 56. 72, and the holding lever 71 and the release arm 72 are individually rotatable.
  • the rotation speed of the holding lever 71 can be set to a speed different from the rotation speed of the release arm 72 pressed by the brake lever 59, and the rotation speed of the holding lever 71 at the time of attraction by the electromagnet 56 can be released.
  • the rotation speed slower than the rotation speed of the arm 72 the impact applied to the electromagnet 56 when the unlocking body 42A is attracted by the electromagnet 56 can be reduced, and the high performance of the electromagnet 56 can be maintained.
  • the suction portions 57a and 57a are often formed of a material having low hardness, and by reducing the impact applied to the electromagnet 56 by the unlocking body 42A, the suction portions 57a and 57a are worn. It is possible to secure good characteristics by improving the durability of the electromagnet 56.
  • the release arm 72 is urged by the unlock spring 81, and a return spring 76 is provided to urge the holding lever 71 in a direction approaching the release arm 72, and the urging force of the return spring 76 is the urging force of the unlock spring 81. It has been made smaller.
  • the holding lever 71 is rotated in the direction of approaching the releasing arm 72 by the return spring 76 having an urging force smaller than the urging force of the unlocking spring 81.
  • the rotation speed can be made slower than the rotation speed of the release arm 72, and the impact of the unlocking body 42A on the electromagnet 56 can be reliably reduced by a simple configuration.
  • ⁇ Link structure> The structure of the link 16 will be described below (see FIGS. 27 to 29).
  • the blade opening / closing device 11 is provided with two links 16 and 16 having different outer shapes, but only one of the links 16 will be described below for the sake of simplicity. However, the structure (layer structure) of the two links 16 is the same.
  • the sector 15a of the opening / closing blade 15 is connected to the drive lever 36 in the drive body 34 via the link 16.
  • the link 16 is formed of, for example, carbon fiber reinforced plastic (CFRP: Carbon Fiber Reinforced Plastics), and is configured by laminating a plurality of prepregs 85, 85, .... Therefore, the link 16 is ensured to have high strength and rigidity by reinforcing the resin with carbon fibers as compared with the case where the link 16 is formed of the resin.
  • CFRP Carbon Fiber Reinforced Plastics
  • carbon fiber for example, polyacrylonitrile or pitch-based carbon fiber obtained from petroleum or coal is used.
  • resin for example, a thermosetting epoxy resin is used.
  • the link 16 is formed in a shape having a longitudinal direction and a lateral direction, and is configured by stacking an odd number of prepregs 85, 85, ..., For example, three prepregs 85.
  • the prepreg 85 is a sheet-like member in which carbon fibers are impregnated with resin, and the carbon fibers are formed side by side in one direction.
  • the prepreg 85 is formed as a longitudinal fiber prepreg 86 in which the fiber direction of the carbon fibers is in the longitudinal direction or a short fiber prepreg 87 in which the fiber direction of the carbon fibers is in the lateral direction.
  • the image in the fiber direction is shown by stripes.
  • the link 16 is configured by alternately laminating the longitudinal fiber prepreg 86 and the short fiber prepreg 87, and the number of the longitudinal fiber prepreg 86 is larger than the number of the short fiber prepreg 87. Therefore, the link 16 has a layer structure in which the longitudinal fiber prepregs 86, 86 are located on the outer side in the thickness direction, and the short fiber prepreg 87 is located between the longitudinal fiber prepregs 86, 86.
  • the number of the link 16 is limited to three.
  • the number of prepregs 85 may be an odd number of 5 or more.
  • the link 16 in which five prepregs 85 are laminated it is composed of three longitudinal fiber prepregs 86 and two short fiber prepregs 87, and the longitudinal fiber prepregs 86 and the short fiber prepregs 87 are alternately laminated. Has been done.
  • the link 16 is formed of carbon fiber reinforced plastic in which an odd number of prepregs 85 are laminated, and the longitudinal fiber prepreg 86 having the fiber direction in the longitudinal direction and the short fiber prepreg 87 having the fiber direction in the lateral direction are formed. And are alternately laminated, and the number of longitudinal fiber prepregs 86 is larger than the number of short fiber prepregs 87.
  • the rigidity of the link 16 is further increased, the durability of the link 16 can be improved, and the operation of the opening / closing blade 15 connected to the link 16 can be smoothed and stabilized.
  • the image pickup device 1 includes a camera block 90 that has an imaging function, a camera signal processing unit 91 that performs signal processing such as analog-to-digital conversion of the captured image signal, and an image processing unit 92 that performs recording / playback processing of the image signal. have. Further, the image pickup device 1 includes a display unit 93 (display 7) for displaying a captured image and the like, an R / W (reader / writer) 94 for writing and reading an image signal to the memory 100, and an image pickup device.
  • a CPU (Central Processing Unit) 95 that controls the entire 1 unit, a lens drive control unit 96 that controls the drive of a lens arranged in a camera block 90, and an operation unit such as various switches in which a user performs a required operation. It is equipped with 97 (shutter button 4, zoom switch 5, power button 6, operation unit 8, etc.).
  • the camera block 90 may be provided as an interchangeable lens 200.
  • the image pickup device 1 is provided with an image pickup device 12 such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) that converts an optical image captured by the camera block 90 into an electrical signal.
  • an image pickup device 12 such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) that converts an optical image captured by the camera block 90 into an electrical signal.
  • CCD Charge Coupled Device
  • CMOS Complementary Metal-Oxide Semiconductor
  • the camera signal processing unit 91 performs various signal processing such as conversion of the output signal from the image pickup element 12 into a digital signal, noise removal, image quality correction, and conversion into a luminance / color difference signal.
  • the image processing unit 92 performs compression coding / decompression decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like.
  • the display unit 93 has a function of displaying various data such as an operation state of the user's operation unit 97 and a captured image.
  • the image pickup device 1 may not be provided with the display unit 93, and may be configured so that the captured image data is sent to another display device to display the image.
  • the R / W 94 writes the image data encoded by the image processing unit 92 to the memory 100 and reads the image data recorded in the memory 100.
  • the CPU 95 functions as a control processing unit that controls each circuit block provided in the image pickup apparatus 1, and controls each circuit block based on an instruction input signal or the like from the operation unit 97.
  • the lens drive control unit 96 controls a drive source for moving the lens based on a control signal from the CPU 95.
  • the operation unit 97 outputs an instruction input signal corresponding to the operation by the user to the CPU 95.
  • the memory 100 is, for example, a semiconductor memory that can be attached to and detached from a slot connected to the R / W 94, or a semiconductor memory that is preliminarily incorporated inside the image pickup apparatus 1.
  • the shot image signal is output to the display unit 93 via the camera signal processing unit 91 and displayed as a camera-through image.
  • the CPU 95 outputs a control signal to the lens drive control unit 96, and the lens is moved based on the control of the lens drive control unit 96.
  • the shot image signal is output from the camera signal processing unit 91 to the image processing unit 92, compressed and encoded, and converted into digital data in a predetermined data format. Will be converted.
  • the converted data is output to R / W 94 and written to the memory 100.
  • the R / W 94 reads the predetermined image data from the memory 100 in response to the operation on the operation unit 97, and the image processing unit 92 performs the decompression / decoding process. After that, the reproduced image signal is output to the display unit 93 and the reproduced image is displayed.
  • imaging means conversion from photoelectric conversion processing for converting light captured by the imaging element 12 into an electric signal to digital signal for the output signal from the imaging element 12 by the camera signal processing unit 91. , Noise removal, image quality correction, conversion to brightness / color difference signals, etc., compression coding / decompression decoding processing of image signals based on a predetermined image data format by the image processing unit 92, conversion processing of data specifications such as resolution, etc. , Refers to a process including only a part or all of a series of processes up to the process of writing an image signal to the memory 100 by the R / W 94.
  • imaging may refer only to the photoelectric conversion process for converting the light captured by the imaging element 12 into an electric signal, and from the photoelectric conversion process for converting the light captured by the imaging element 12 into an electric signal. It may also refer to processing such as conversion of the output signal from the image pickup element 12 by the camera signal processing unit 91 into a digital signal, noise removal, image quality correction, and conversion into a brightness / color difference signal, and is captured by the image pickup element 12. After the photoelectric conversion process for converting light into an electric signal, the camera signal processing unit 91 converts the output signal from the image pickup element 12 into a digital signal, noise removal, image quality correction, conversion into a brightness / color difference signal, and the like.
  • the camera block 90 and the image pickup device 1 are configured to include only a part or all of the image pickup element 12, the camera signal processing section 91, the image processing section 92, and the R / W 94 that perform the above processing. You may be.
  • the camera block 90 may be configured to include a part of the image sensor 12, the camera signal processing unit 91, the image processing unit 92, and the R / W 94, and the apparatus main body 200 may include the rest.
  • the present technology can also be configured as follows.
  • Opening and closing blades that operate in the opening and closing direction to open and close the opening,
  • a magnetic drive unit having a coil to which a drive current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet.
  • a drive body having a drive gear meshed with the rotor gear and rotating synchronously in the direction opposite to the magnet.
  • the opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction via the driving body.
  • a blade opening / closing device in which the opening / closing blade is operated in the opening / closing direction as the drive body rotates.
  • the drive body is provided with a supported shaft portion that functions as a rotation fulcrum portion.
  • a torsion coil spring is used as the traveling spring.
  • the blade opening / closing device according to any one of (1) to (3) above, wherein the traveling spring is supported by the supported shaft portion.
  • a locking member having a locking portion and operating between a locked position and a non-locking position is provided.
  • a locked portion is formed on the driving body, and a locked portion is formed.
  • the drive body is locked to the lock member by pressing the locked portion against the lock portion by the urging force of the traveling spring at the lock position according to any one of (1) to (4). Blade opening and closing device.
  • An unlocking body that operates between the lock holding position and the unlocking position and operates the locking member between the locking position and the unlocking position.
  • An electromagnet that holds the unlocked body in the lock holding position by adsorption, and The blade opening / closing device according to (5), wherein an unlocking spring for urging the unlocked body toward the unlocked position is provided.
  • the brake lever is made rotatable
  • the brake lever is provided with a brake arm pressed by the driving body and an action arm pressing the unlocking body.
  • the brake arm is pressed by the driving body, the unlocking body is pressed by the acting arm, so that the unlocking body is operated from the unlocking position to the lock holding position, and the locking member is operated.
  • the blade opening / closing device according to (7) which is operated from an unlocked position to the locked position.
  • the unlocking body has a holding lever that is attracted to the electromagnet and an unlocking arm that is pressed by the brake lever.
  • the release arm is urged by the unlock spring, and the release arm is urged.
  • a return spring is provided to urge the holding lever in a direction approaching the release arm.
  • the opening / closing blade is connected to the driving body via a link, and the opening / closing blade is connected to the driving body.
  • the link is formed of a carbon fiber reinforced plastic in which an odd number of prepregs are laminated while being formed in a shape having a longitudinal direction and a lateral direction.
  • the prepreg in which the fiber direction of the prepreg is in the longitudinal direction or the lateral direction and the fiber direction is in the longitudinal direction is formed as a longitudinal fiber prepreg, and the prepreg in which the fiber direction is in the lateral direction is used as a short fiber prepreg.
  • the blade opening / closing device is Opening and closing blades that operate in the opening and closing direction to open and close the opening, A magnetic drive unit having a coil to which a drive current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet. A drive body having a drive gear meshed with the rotor gear and rotating synchronously in the direction opposite to the magnet.
  • the opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction via the driving body.
  • An imaging device in which the opening / closing blades are operated in the opening / closing direction as the drive body rotates.
  • Imaging device 10 Optical system 11
  • Blade opening / closing device 12 Imaging element 13a Opening 15 Opening / closing blade 16
  • Link 27 Magnetic drive unit 31
  • Coil 32 Magnet 33
  • Rotor gear 34 Drive body 35
  • Drive gear 36c Locked part 37
  • Supported shaft part 40
  • Traveling spring 42 Unlocking body 43
  • Locking member 51
  • Locking part 56
  • Electromagnet 59 Brake lever 60 Brake arm 61 Acting arm 42A Unlocking body 43
  • Locking member 71 Holding lever 72
  • Unlocking arm 76 Return spring 81
  • Unlocking spring 85 Prepreg 86 Longitudinal fiber prepreg 87 Short fiber prepreg

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

The present invention is equipped with: an opening/closing blade which operates in the opening/closing direction for opening and closing an opening; a magnetic drive unit having a coil to which a drive current is supplied, a magnet which rotates according to the conduction of electricity to the coil, and a rotor gear which rotates according to the rotation of the magnet; a drive body which has a drive gear for meshing with the rotor gear, and synchronously rotates with the magnet in the opposite direction; and a travel spring which imparts a biasing force to the opening/closing blade via the drive body toward one side in the opening/closing direction. Therein, the opening/closing blade is operated in the opening/closing direction according to the rotation operation of the drive body.

Description

羽根開閉装置及び撮像装置Blade switchgear and image pickup device
　本技術は、開閉羽根を開閉するための磁気駆動部と駆動体を有する羽根開閉装置及びこれを備えた撮像装置についての技術分野に関する。 This technology relates to a technical field of a blade opening / closing device having a magnetic drive unit for opening / closing the opening / closing blade and a driving body, and an imaging device equipped with the magnetic drive unit.
　ビデオカメラやスチルカメラ等の各種の撮像装置には、内部にレンズ群や光学素子等を有する光学系と光学系によって取り込まれた光を光電変換する撮像素子とが配置されている。このような撮像装置には、被写体の撮影時に、例えば、羽根開閉装置として機能するフォーカルプレーンシャッターを介して撮像素子に光が入射されるものがある。 Various image pickup devices such as video cameras and still cameras are provided with an optical system having a lens group, an optical element, or the like inside, and an image pickup element that photoelectrically converts the light captured by the optical system. Some such image pickup devices include light incident on the image pickup device via a focal plane shutter that functions as a blade opening / closing device, for example, when a subject is photographed.
　羽根開閉装置には開口が形成されたベース体とベース体に対して移動（走行）される開閉羽根と開閉羽根を動作させる磁気駆動部とが設けられ、磁気駆動部においてマグネットが回転されて開閉羽根が開口を開閉する開閉動作が行われるものがある（例えば、特許文献１参照）。 The blade opening / closing device is provided with a base body having an opening, an opening / closing blade that moves (runs) with respect to the base body, and a magnetic drive unit that operates the opening / closing blade. In some cases, the blades open and close the opening (see, for example, Patent Document 1).
　このような羽根開閉装置にあっては、各モードにおいて開閉羽根が磁気駆動部によって所定の状態で動作される。磁気駆動部にはマグネットとコイルとヨークが設けられ、コイルへの駆動電流の供給によって回転されるマグネットに伴って開閉羽根が移動される。開閉羽根の開閉動作が行われていないときには、開閉羽根が開口を開放する開放位置又は開口を閉塞する閉塞位置にある。 In such a blade opening / closing device, the opening / closing blade is operated in a predetermined state by the magnetic drive unit in each mode. The magnetic drive unit is provided with a magnet, a coil, and a yoke, and the opening / closing blades are moved along with the magnet rotated by supplying a drive current to the coil. When the opening / closing operation of the opening / closing blade is not performed, the opening / closing blade is in the opening position for opening the opening or the closing position for closing the opening.
　被写体の撮影時には、開口を透過された光が撮像素子の撮像面に一方から他方へ順に入射されることにより露光が行われ、入射された光が撮像素子によって順次光電変換されて画像信号が生成され、生成された画像信号がメモリーに転送されて被写体の像が生成される。 When a subject is photographed, the light transmitted through the aperture is sequentially incident on the image pickup surface of the image sensor from one side to the other to perform exposure, and the incident light is sequentially photoelectrically converted by the image sensor to generate an image signal. Then, the generated image signal is transferred to the memory to generate an image of the subject.
特開２０１４－６７００１号公報Japanese Unexamined Patent Publication No. 2014-67001
　ところで、上記のような羽根開閉装置においては、撮影態様の多様化等に対応して開閉羽根の走行速度が高くされることが望ましい。 By the way, in the blade opening / closing device as described above, it is desirable that the traveling speed of the opening / closing blade is increased in accordance with the diversification of shooting modes and the like.
　このように開閉羽根の走行速度を高くするためには、磁気駆動部において発生する駆動力を高くすることが考慮されるが、磁気駆動部において発生する駆動力を高くすると、磁気駆動部の大型化や消費電力の増大等を来すおそれがある。 In order to increase the traveling speed of the opening / closing blades in this way, it is considered to increase the driving force generated in the magnetic drive unit, but if the driving force generated in the magnetic drive unit is increased, the size of the magnetic drive unit becomes large. There is a risk of magnetism and increased power consumption.
　そこで、本技術羽根開閉装置及び撮像装置は、上記した問題点を克服し、磁気駆動部の大型化や消費電力の増大を伴うことなく開閉羽根の走行速度の高速化を図ることを目的とする。 Therefore, the purpose of the blade switchgear and the imaging device of the present technology is to overcome the above-mentioned problems and to increase the traveling speed of the switchgear without increasing the size of the magnetic drive unit and the increase in power consumption. ..
　第１に、本技術に係る羽根開閉装置は、開口を開閉する開閉方向へ動作される開閉羽根と、駆動電流が供給されるコイルと前記コイルへの通電に伴って回転されるマグネットと前記マグネットの回転に伴って回転されるローターギヤとを有する磁気駆動部と、前記ローターギヤに噛合される駆動ギヤを有し前記マグネットと反対方向へ同期して回動される駆動体と、前記駆動体を介して前記開閉羽根に前記開閉方向における一方への付勢力を付与する走行バネとを備え、前記開閉羽根が前記駆動体の回動動作に伴って前記開閉方向へ動作されるものである。 First, the blade opening / closing device according to the present technology includes an opening / closing blade that is operated in the opening / closing direction to open / close the opening, a coil to which a driving current is supplied, a magnet that is rotated by energizing the coil, and the magnet. A magnetic drive unit having a rotor gear that is rotated with the rotation of the magnet, a drive body that has a drive gear that is meshed with the rotor gear and is rotated in the opposite direction to the magnet, and the drive body. The opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction, and the opening / closing blade is operated in the opening / closing direction in accordance with the rotational operation of the drive body.
　これにより、コイルへの通電に伴って発生する磁気駆動部の駆動力と駆動体における走行バネの付勢力とによって開閉羽根の開閉動作を行うことが可能になる。 This makes it possible to open and close the opening / closing blades by the driving force of the magnetic driving unit generated by energizing the coil and the urging force of the traveling spring in the driving body.
　第２に、上記した羽根開閉装置においては、前記駆動体又は前記磁気駆動部の少なくとも一方の駆動力によって前記開閉羽根が動作されることが望ましい。 Secondly, in the above-mentioned blade opening / closing device, it is desirable that the opening / closing blade is operated by the driving force of at least one of the driving body or the magnetic driving unit.
　これにより、開閉羽根が磁気駆動部と駆動体の少なくとも一方の駆動力によって開閉方向へ動作されるため、開閉羽根の動作制御に関する自由度が向上する。 As a result, the opening / closing blades are operated in the opening / closing direction by the driving force of at least one of the magnetic drive unit and the driving body, so that the degree of freedom regarding the operation control of the opening / closing blades is improved.
　第３に、上記した羽根開閉装置においては、前記磁気駆動部と前記駆動体が前記開閉羽根の開閉方向と同じ方向において並んで配置されることが望ましい。 Thirdly, in the above-mentioned blade opening / closing device, it is desirable that the magnetic driving unit and the driving body are arranged side by side in the same direction as the opening / closing direction of the opening / closing blade.
　これにより、磁気駆動部と駆動体が開口を通過する光の進行方向に並ばない配置にされる。 As a result, the magnetic drive unit and the drive body are arranged so as not to line up in the traveling direction of the light passing through the opening.
　第４に、上記した羽根開閉装置においては、前記駆動体に回動支点部として機能する被支持軸部が設けられ、前記走行バネとして捩じりコイルバネが用いられ、前記走行バネが前記被支持軸部に支持されることが望ましい。 Fourth, in the blade opening / closing device described above, the drive body is provided with a supported shaft portion that functions as a rotation fulcrum portion, a torsion coil spring is used as the traveling spring, and the traveling spring is supported by the traveling spring. It is desirable to be supported by the shaft.
　これにより、走行バネの配置スペースが小さいと共に開閉羽根に付与される付勢力を大きくすることが可能になる。 This makes it possible to reduce the space for arranging the traveling springs and increase the urging force applied to the opening / closing blades.
　第５に、上記した羽根開閉装置においては、ロック部を有しロック位置と非ロック位置の間で動作されるロック部材が設けられ、前記駆動体に被ロック部が形成され、前記ロック位置において前記走行バネの付勢力により前記被ロック部が前記ロック部に押し付けられることにより前記駆動体が前記ロック部材にロックされることが望ましい。 Fifth, in the above-mentioned blade opening / closing device, a locking member having a locking portion and operating between a locked position and a non-locking position is provided, a locked portion is formed on the driving body, and the locked portion is formed at the locked position. It is desirable that the drive body is locked to the lock member by pressing the locked portion against the lock portion by the urging force of the traveling spring.
　これにより、走行バネの付勢力によって被ロック部がロック部に押し付けられることにより開閉羽根の開閉動作の開始前の駆動体における初期位置が定まる。 As a result, the locked portion is pressed against the locked portion by the urging force of the traveling spring, so that the initial position of the drive body before the start of the opening / closing operation of the opening / closing blade is determined.
　第６に、上記した羽根開閉装置においては、ロック保持位置とロック解除位置の間で動作され前記ロック部材を前記ロック位置と前記非ロック位置の間で動作させるロック解除体と、吸着することにより前記ロック解除体を前記ロック保持位置に保持する電磁石と、前記ロック解除体を前記ロック解除位置へ向けて付勢するロック解除バネとが設けられることが望ましい。 Sixth, in the above-mentioned blade opening / closing device, the lock member is attracted to an unlocked body that is operated between the lock holding position and the unlocked position and operates between the locked position and the unlocked position. It is desirable to provide an electromagnet that holds the unlocked body at the lock holding position and an unlocking spring that urges the unlocked body toward the unlocked position.
　これにより、電磁石によってロック解除体がロック保持位置に保持され、電磁石のロック解除体への作用を解除することによりロック解除体がロック解除バネの付勢力によってロック保持位置からロック解除位置へ向けて動作させることが可能になる。 As a result, the unlocked body is held in the lock holding position by the electromagnet, and by releasing the action of the electromagnet on the unlocked body, the unlocked body is moved from the lock holding position to the unlocked position by the urging force of the unlocking spring. It becomes possible to operate.
　第７に、上記した羽根開閉装置においては、前記駆動体の所定の回動範囲において前記駆動体の回動速度を回動端に近付くに従って低減するブレーキレバーが設けられることが望ましい。 Seventh, in the blade opening / closing device described above, it is desirable to provide a brake lever that reduces the rotation speed of the drive body as it approaches the rotation end within a predetermined rotation range of the drive body.
　これにより、回動速度が回動端に近付くに従って低減されて駆動体の回動が停止されるため、駆動体の急減速及び駆動体からの各部への衝撃が抑制される。 As a result, the rotation speed is reduced as the rotation end approaches the rotation end, and the rotation of the drive body is stopped, so that sudden deceleration of the drive body and impact from the drive body to each part are suppressed.
　第８に、上記した羽根開閉装置においては、前記ブレーキレバーが回動可能にされ、前記ブレーキレバーには前記駆動体によって押圧されるブレーキアームと前記ロック解除体を押圧する作用アームとが設けられ、前記駆動体による前記ブレーキアームの押圧時に前記作用アームによって前記ロック解除体が押圧されることにより前記ロック解除体が前記ロック解除位置から前記ロック保持位置へ向けて動作される共に前記ロック部材が前記非ロック位置から前記ロック位置へ向けて動作されることが望ましい。 Eighth, in the blade opening / closing device described above, the brake lever is rotatable, and the brake lever is provided with a brake arm pressed by the driving body and an action arm pressing the unlocking body. When the brake arm is pressed by the driving body, the unlocking body is pressed by the acting arm, so that the unlocking body is operated from the unlocking position to the lock holding position, and the locking member is operated. It is desirable to operate from the unlocked position to the locked position.
　これにより、ブレーキレバーによって駆動体の減速とロック解除体のロック解除位置からロック保持位置へ向けての動作とが行われるため、駆動体の減速とロック解除体の動作とを行うための各別の機構を設ける必要がない。 As a result, the brake lever decelerates the drive body and operates the unlocked body from the unlocked position to the lock holding position. Therefore, the deceleration of the drive body and the operation of the unlocked body are performed separately. It is not necessary to provide the mechanism of.
　第９に、上記した羽根開閉装置においては、前記ロック解除体が前記電磁石に吸着される保持レバーと前記ブレーキレバーによって押圧される解除アームとを有し、前記保持レバーと前記解除アームが各別に回動可能にされることが望ましい。 Ninth, in the blade opening / closing device described above, the unlocking body has a holding lever attracted to the electromagnet and a releasing arm pressed by the brake lever, and the holding lever and the releasing arm are separately provided. It is desirable to be rotatable.
　これにより、保持レバーの回動速度をブレーキレバーによって押圧される解除アームの回動速度と異なる速度にすることが可能になる。 This makes it possible to set the rotation speed of the holding lever to a speed different from the rotation speed of the release arm pressed by the brake lever.
　第１０に、上記した羽根開閉装置においては、前記ロック解除バネによって前記解除アームが付勢され、前記保持レバーを前記解除アームに近付く方向へ付勢する戻しバネが設けられ、前記戻しバネの付勢力が前記ロック解除バネの付勢力より小さくされることが望ましい。 Tenth, in the above-mentioned blade opening / closing device, the release arm is urged by the lock release spring, and a return spring for urging the holding lever in a direction approaching the release arm is provided, and the return spring is attached. It is desirable that the force be smaller than the urging force of the unlock spring.
　これにより、ロック解除バネの付勢力より小さい付勢力を有する戻しバネによって保持レバーが解除アームに近付く方向へ回動される。 As a result, the holding lever is rotated in the direction of approaching the release arm by the return spring having an urging force smaller than the urging force of the unlocking spring.
　第１１に、上記した羽根開閉装置においては、前記開閉羽根がリンクを介して前記駆動体に連結され、前記リンクは長手方向と短手方向を有する形状に形成されると共に奇数枚のプリプレグが積層された炭素繊維強化プラスチックによって形成され、前記プリプレグの繊維方向が長手方向又は短手方向にされると共に繊維方向が長手方向にされた前記プリプレグが長手繊維プリプレグとして形成され繊維方向が短手方向にされた前記プリプレグが短手繊維プリプレグとして形成され、前記長手繊維プリプレグと前記短手繊維プリプレグが交互に積層され前記長手繊維プリプレグの数が前記短手繊維プリプレグの数より多くされることが望ましい。 Eleventh, in the above-mentioned blade opening / closing device, the opening / closing blade is connected to the driving body via a link, the link is formed in a shape having a longitudinal direction and a lateral direction, and an odd number of prepregs are laminated. The prepreg is formed of carbon fiber reinforced plastic, and the fiber direction of the prepreg is set to the longitudinal direction or the lateral direction, and the prepreg whose fiber direction is the longitudinal direction is formed as the longitudinal fiber prepreg, and the fiber direction is the lateral direction. It is desirable that the formed prepreg is formed as a short fiber prepreg, and the longitudinal fiber prepreg and the short fiber prepreg are alternately laminated so that the number of the longitudinal fiber prepregs is larger than the number of the short fiber prepregs.
　これにより、リンクの剛性が高くなる。 This increases the rigidity of the link.
　本技術に係る撮像装置は、光学系を介して取り込まれる光の制御を行う羽根開閉装置と前記光学系を介して取り込まれる光を光電変換する撮像素子とを備え、前記羽根開閉装置は、開口を開閉する開閉方向へ動作される開閉羽根と、駆動電流が供給されるコイルと前記コイルへの通電に伴って回転されるマグネットと前記マグネットの回転に伴って回転されるローターギヤとを有する磁気駆動部と、前記ローターギヤに噛合される駆動ギヤを有し前記マグネットと反対方向へ同期して回動される駆動体と、前記駆動体を介して前記開閉羽根に前記開閉方向における一方への付勢力を付与する走行バネとを備え、前記開閉羽根が前記駆動体の回動動作に伴って前記開閉方向へ動作されるものである。 The imaging device according to the present technology includes a blade opening / closing device that controls the light taken in through the optical system and an imaging element that photoelectrically converts the light taken in through the optical system, and the blade opening / closing device has an opening. Magnetism having an opening / closing blade that is operated in an opening / closing direction, a coil to which a driving current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet. A drive unit, a drive body having a drive gear meshed with the rotor gear and rotating in the opposite direction to the magnet, and an opening / closing blade via the driving body to one side in the opening / closing direction. It is provided with a traveling spring that applies urging force, and the opening / closing blade is operated in the opening / closing direction in accordance with the rotational operation of the drive body.
　これにより、羽根開閉装置において、コイルへの通電に伴って発生する磁気駆動部の駆動力と走行バネの付勢力とによって開閉羽根の開閉動作を行うことが可能になる。 As a result, in the blade opening / closing device, the opening / closing operation of the opening / closing blade can be performed by the driving force of the magnetic drive unit and the urging force of the traveling spring generated by energizing the coil.
図２乃至図３０と共に本技術羽根開閉装置及び撮像装置の実施の形態を示すものであり、本図は、撮像装置の斜視図である。2 to 30 show an embodiment of the blade opening / closing device and the image pickup device of the present technology, and this figure is a perspective view of the image pickup device. 撮像装置を図１とは異なる方向から見た状態で示す斜視図である。It is a perspective view which shows the image pickup apparatus in the state which was seen from the direction different from FIG. 撮像装置の概略側面図である。It is a schematic side view of the image pickup apparatus. 羽根開閉装置の斜視図である。It is a perspective view of the blade opening / closing device. 羽根開閉装置の分解斜視図である。It is an exploded perspective view of the blade opening / closing device. 開閉羽根が開放位置に保持されている状態を示す正面図である。It is a front view which shows the state which the opening / closing blade is held in an open position. 開閉羽根が閉塞位置に保持されている状態を示す正面図である。It is a front view which shows the state which the opening / closing vane is held in a closed position. 駆動機構等を示す分解斜視図である。It is an exploded perspective view which shows the drive mechanism and the like. 駆動機構等を図８とは異なる方向から見た状態で示す分解斜視図である。It is an exploded perspective view which shows the drive mechanism and the like as seen from the direction different from FIG. マグネットとギヤ体と駆動体を示す拡大斜視図である。It is an enlarged perspective view which shows a magnet, a gear body, and a drive body. マグネットとギヤ体と駆動体を図１０とは異なる方向から見た状態で示す拡大斜視図である。FIG. 5 is an enlarged perspective view showing a magnet, a gear body, and a drive body as viewed from a direction different from that of FIG. ロック動作ユニットを示す拡大斜視図である。It is an enlarged perspective view which shows the lock operation unit. ロック動作ユニットを図１２とは異なる方向から見た状態で示す拡大斜視図である。It is an enlarged perspective view which shows the lock operation unit as seen from the direction different from FIG. 図１５乃至図１８と共に羽根開閉装置の動作を示すものであり、本図は、駆動機構の初期状態を示す背面図である。15 to 18 show the operation of the blade opening / closing device, and this figure is a rear view showing an initial state of the drive mechanism. 開閉羽根の閉塞動作が開始された直後の駆動機構の状態を示す背面図である。It is a rear view which shows the state of the drive mechanism immediately after the closing operation of an opening / closing blade is started. 図１５に引き続いて開閉羽根の閉塞動作が行われ、駆動体の連結軸がブレーキレバーに接した状態を示す背面図である。FIG. 15 is a rear view showing a state in which the opening / closing blades are closed and the connecting shaft of the driving body is in contact with the brake lever. 図１６に引き続いて開閉羽根の閉塞動作が行われ、駆動体がブレーキレバーによって減速されると共にブレーキレバーの押圧軸によってロック解除体が押圧された状態を示す背面図である。FIG. 16 is a rear view showing a state in which the opening / closing blades are closed, the drive body is decelerated by the brake lever, and the unlocked body is pressed by the pressing shaft of the brake lever. 開閉羽根の開放動作が行われるときの駆動機構の状態を示す背面図である。It is a rear view which shows the state of the drive mechanism at the time of opening operation of an opening / closing vane. 変形例に係るロック動作ユニットを示す拡大斜視図である。It is an enlarged perspective view which shows the lock operation unit which concerns on a modification. 変形例に係るロック動作ユニットを図１９とは異なる方向から見た状態で示す拡大斜視図である。FIG. 5 is an enlarged perspective view showing a lock operation unit according to a modified example as viewed from a direction different from that of FIG. 図２２乃至図２６と共に変形例に係るロック動作ユニットが用いられた羽根開閉装置の動作を示すものであり、本図は、駆動機構の初期状態を示す背面図である。22 to 26 show the operation of the blade opening / closing device using the lock operation unit according to the modified example, and this figure is a rear view showing the initial state of the drive mechanism. 開閉羽根の閉塞動作が開始された直後の駆動機構の状態を示す背面図である。It is a rear view which shows the state of the drive mechanism immediately after the closing operation of an opening / closing blade is started. 図２２に引き続いて開閉羽根の閉塞動作が行われ、駆動体の連結軸がブレーキレバーに接した状態を示す背面図である。FIG. 22 is a rear view showing a state in which the opening / closing blades are closed and the connecting shaft of the driving body is in contact with the brake lever. 図２３に引き続いて開閉羽根の閉塞動作が行われ、駆動体がブレーキレバーによって減速されると共にブレーキレバーの押圧軸によって解除アームが押圧された状態を示す背面図である。FIG. 23 is a rear view showing a state in which the opening / closing blades are closed, the drive body is decelerated by the brake lever, and the release arm is pressed by the pressing shaft of the brake lever. 図２４に引き続き解除アームと保持レバーがロック保持位置まで回動された状態を示す背面図である。FIG. 24 is a rear view showing a state in which the release arm and the holding lever are rotated to the lock holding position following FIG. 24. 開閉羽根の開放動作が行われるときの駆動機構の状態を示す背面図である。It is a rear view which shows the state of the drive mechanism at the time of opening operation of an opening / closing vane. 図２８及び図２９と共にリンクの構造例を示すものであり、本図は、長手繊維プリプレグと短手繊維プリプレグを示す正面図である。A structural example of the link is shown together with FIGS. 28 and 29, and this figure is a front view showing a longitudinal fiber prepreg and a short fiber prepreg. プリプレグを分離した状態で示すリンクの斜視図である。It is a perspective view of the link which shows the prepreg in a separated state. リンクの斜視図である。It is a perspective view of a link. 撮像装置のブロック図である。It is a block diagram of an image pickup apparatus.
　以下に、本技術を実施するための形態を添付図面を参照して説明する。 The mode for implementing this technology will be described below with reference to the attached drawings.
　以下に示す実施の形態は、本技術撮像装置をスチルカメラに適用し、本技術羽根開閉装置をこのスチルカメラに設けられたフォーカルプレーンシャッターに適用したものである。 In the embodiment shown below, the present technology imaging device is applied to a still camera, and the present technology blade opening / closing device is applied to a focal plane shutter provided in this still camera.
　尚、本技術の適用範囲はスチルカメラ及びスチルカメラに設けられたフォーカルプレーンシャッターに限られることはなく、例えば、ビデオカメラや他の機器に組み込まれる各種の撮像装置及びこれらの撮像装置に設けられるアイリス等の各種の羽根開閉装置に広く適用することができる。 The scope of application of this technology is not limited to still cameras and focal plane shutters provided in still cameras, and is provided in, for example, various image pickup devices incorporated in video cameras and other devices, and these image pickup devices. It can be widely applied to various blade opening / closing devices such as irises.
　以下の説明にあっては、スチルカメラの撮影時において撮影者から見た方向で前後上下左右の方向を示すものとする。従って、被写体側が前方となり、撮影者側が後方となる。 In the following explanation, the directions of front, back, up, down, left and right are shown in the direction seen by the photographer when shooting with the still camera. Therefore, the subject side is the front side and the photographer side is the rear side.
　尚、以下に示す前後上下左右の方向は説明の便宜上のものであり、本技術の実施に関しては、これらの方向に限定されることはない。 The directions shown below are for convenience of explanation, and the implementation of the present technology is not limited to these directions.
　また、以下に示すレンズ群は、単数又は複数のレンズにより構成されたもの他、これらの単数又は複数のレンズとアイリス等の他の光学素子を含んでもよい。 Further, the lens group shown below may include one composed of a single or a plurality of lenses, these single or a plurality of lenses, and other optical elements such as an iris.
　＜撮像装置の概略構成＞
　先ず、撮像装置の概略構成について説明する（図１乃至図３参照）。 <Outline configuration of imaging device>
First, a schematic configuration of the image pickup apparatus will be described (see FIGS. 1 to 3).
　撮像装置１は、図１及び図２に示すように、例えば、横長の扁平な筐体２の内外に所要の各部が配置されて成る。撮像装置１は、図１に示すように、交換レンズ２００の着脱が可能な装置であってもよい。 As shown in FIGS. 1 and 2, the image pickup apparatus 1 is composed of, for example, required parts arranged inside and outside a horizontally long flat housing 2. As shown in FIG. 1, the image pickup device 1 may be a device in which the interchangeable lens 200 can be attached and detached.
　筐体２の前面にはフラッシュ３が設けられている。筐体２の上面にはシャッター釦４、ズームスイッチ５及び電源釦６が設けられている（図１及び図２参照）。筐体２の後面にはディスプレイ７と各種の操作部８、８、・・・とファインダー９が設けられている。 A flash 3 is provided on the front surface of the housing 2. A shutter button 4, a zoom switch 5, and a power button 6 are provided on the upper surface of the housing 2 (see FIGS. 1 and 2). A display 7, various operation units 8, 8, ..., And a finder 9 are provided on the rear surface of the housing 2.
　筐体２の内部には、図３に示すように、レンズ群や光学素子等を有する光学系１０と光学系１０によって取り込まれた光の量を制御する羽根開閉装置（フォーカルプレーンシャッター）１１と羽根開閉装置１１を介して取り込まれた光を光電変換する撮像素子１２とが前側から順に配置されている。 Inside the housing 2, as shown in FIG. 3, an optical system 10 having a lens group, an optical element, and the like, and a blade opening / closing device (focal plane shutter) 11 for controlling the amount of light taken in by the optical system 10 are provided. An image sensor 12 that photoelectrically converts the light taken in through the blade opening / closing device 11 is arranged in order from the front side.
　＜羽根開閉装置の構成＞
　以下に、羽根開閉装置１１の構成について説明する（図４乃至図１３参照）。 <Structure of blade switchgear>
The configuration of the blade opening / closing device 11 will be described below (see FIGS. 4 to 13).
　羽根開閉装置１１は、ベース体１３と押さえ板１４と開閉羽根１５とリンク１６、１６と駆動機構１７を有し、撮像素子１２の前面側に配置されている（図４乃至図６参照）。 The blade opening / closing device 11 has a base body 13, a holding plate 14, an opening / closing blade 15, links 16, 16 and a drive mechanism 17, and is arranged on the front side of the image pickup element 12 (see FIGS. 4 to 6).
　ベース体１３は、例えば、横長の矩形状に形成され、前後に貫通された矩形状の開口１３ａを有している（図４及び図５参照）。開口１３ａは撮像素子１２の撮像面における光の有効入射領域より一回り大きくされている。撮像面における光の有効入射領域は、光学系１０によって取り込まれ画像を生成するために必要な光が入射される領域である。 The base body 13 is formed, for example, in a horizontally long rectangular shape, and has a rectangular opening 13a penetrating in the front-rear direction (see FIGS. 4 and 5). The opening 13a is one size larger than the effective incident region of light on the image pickup surface of the image pickup device 12. The effective incident region of light on the imaging surface is a region in which light captured by the optical system 10 and necessary for generating an image is incident.
　ベース体１３における開口１３ａの下方の部分は開閉羽根１５が開放位置において保持される保持領域となる保持部１８として設けられ、ベース体１３における開口１３ａの一方の側方の部分は取付部１９として設けられている。ベース体１３の後側には撮像素子１２が配置される。 The lower portion of the opening 13a in the base body 13 is provided as a holding portion 18 serving as a holding region in which the opening / closing blade 15 is held in the open position, and one side portion of the opening 13a in the base body 13 is used as the mounting portion 19. It is provided. The image sensor 12 is arranged on the rear side of the base body 13.
　取付部１９における側方の端部には前方に突出された支持ピン１９ａ、１９ａが上下に離隔して設けられている。取付部１９には軸移動孔１９ｂが形成され、軸移動孔１９ｂは略円弧状に形成されている。 Support pins 19a and 19a projecting forward are provided at the lateral ends of the mounting portion 19 so as to be separated from each other in the vertical direction. A shaft moving hole 19b is formed in the mounting portion 19, and the shaft moving hole 19b is formed in a substantially arc shape.
　押さえ板１４はベース体１３と略同じ大きさ及び形状に形成され、透過孔１４ａを有している。押さえ板１４は開閉羽根１５を挟んだ状態でベース体１３に前側から取り付けられる。押さえ板１４がベース体１３に取り付けられた状態においては、開口１３ａが透過孔１４ａの真後ろに位置される。 The holding plate 14 is formed in substantially the same size and shape as the base body 13 and has a through hole 14a. The holding plate 14 is attached to the base body 13 from the front side with the opening / closing blade 15 sandwiched between them. When the pressing plate 14 is attached to the base body 13, the opening 13a is located directly behind the transmission hole 14a.
　押さえ板１４には逃げ孔１４ｂが形成され、逃げ孔１４ｂは円弧状に形成されている。 A relief hole 14b is formed in the holding plate 14, and the relief hole 14b is formed in an arc shape.
　開閉羽根１５は複数枚のシート状のセクター１５ａ、１５ａ、・・・によって構成されている（図５参照）。フォーカルプレーンシャッターとして機能する羽根開閉装置１１においては、例えば、撮像素子１２を制御することにより先幕として機能する電子幕と機械的な構造として設けられ後幕として機能する開閉羽根１５との組み合わせによる所謂電子先幕シャッターの構成にされている。 The opening / closing blade 15 is composed of a plurality of sheet-shaped sectors 15a, 15a, ... (See FIG. 5). In the blade opening / closing device 11 that functions as a focal plane shutter, for example, a combination of an electronic curtain that functions as a front curtain by controlling the image sensor 12 and an opening / closing blade 15 that is provided as a mechanical structure and functions as a rear curtain is used. It has a so-called electronic front curtain shutter configuration.
　セクター１５ａ、１５ａ、・・・は横長の形状に形成され、例えば、４枚が設けられている。開閉羽根１５はセクター１５ａ、１５ａ、・・・の少なくとも一部同士が厚み方向において重なって位置されている。セクター１５ａ、１５ａ、・・・は双方のリンク１６、１６にそれぞれ回動可能に連結されている。 The sectors 15a, 15a, ... Are formed in a horizontally long shape, and for example, four sectors are provided. At least a part of the sectors 15a, 15a, ... The opening / closing blade 15 is positioned so as to overlap each other in the thickness direction. The sectors 15a, 15a, ... Are rotatably connected to both links 16 and 16, respectively.
　リンク１６、１６はシート状に形成され、平行リンクとして機能する。リンク１６、１６には長手方向における一端部にそれぞれ支持孔１６ａ、１６ａが形成されている。一方のリンク１６には長手方向における一端寄りの部分に長穴状の連結孔１６ｂが形成されている。リンク１６、１６は支持孔１６ａ、１６ａにそれぞれベース体１３の支持ピン１９ａ、１９ａが挿入され、ベース板１３と押さえ板１４に対して支持ピン１９ａ、１９ａを支点として回動される。 The links 16 and 16 are formed in a sheet shape and function as parallel links. Support holes 16a and 16a are formed in the links 16 and 16 at one end in the longitudinal direction, respectively. One link 16 is formed with an elongated connecting hole 16b at a portion closer to one end in the longitudinal direction. The links 16 and 16 have the support pins 19a and 19a of the base body 13 inserted into the support holes 16a and 16a, respectively, and are rotated with respect to the base plate 13 and the holding plate 14 with the support pins 19a and 19a as fulcrums.
　リンク１６、１６は駆動機構１７の駆動力によって平行な状態を保持したままでベース板１３と押さえ板１４に対して回動される。リンク１６、１６が回動されると、セクター１５ａ、１５ａ、・・・が略上下方向へ移動（走行）される。このときセクター１５ａ、１５ａ、・・・は移動量が異なり、重なる面積が変化され、ベース体１３の開口１３ａを開放する開放位置（図６参照）と開口１３ａを閉塞する閉塞位置（図７参照）との間で開閉動作される。 The links 16 and 16 are rotated with respect to the base plate 13 and the holding plate 14 while maintaining a parallel state by the driving force of the driving mechanism 17. When the links 16 and 16 are rotated, the sectors 15a, 15a, ... Are moved (traveled) substantially in the vertical direction. At this time, the movement amounts of the sectors 15a, 15a, ... Are different, the overlapping area is changed, and the opening position (see FIG. 6) for opening the opening 13a of the base body 13 and the closing position for closing the opening 13a (see FIG. 7). ) Is opened and closed.
　上記のように開閉羽根１５が移動されるときには、セクター１５ａ、１５ａ、・・・は移動される位置に応じて重なる面積が変化され、開放位置において最も面積が小さくされている。 When the opening / closing blade 15 is moved as described above, the overlapping area of the sectors 15a, 15a, ... Is changed according to the moved position, and the area is the smallest in the open position.
　従って、開放位置において開閉羽根１５の配置スペースが小さくなると共に閉塞位置において開閉羽根１５の面積が最も大きくなるため、開閉羽根１５の移動方向における羽根開閉装置１１の小型化を図ることができると共に十分な大きさの開口１３ａを形成することができる。 Therefore, since the space for arranging the opening / closing blades 15 becomes smaller at the open position and the area of the opening / closing blades 15 becomes the largest at the closed position, the blade opening / closing device 11 can be sufficiently miniaturized in the moving direction of the opening / closing blades 15. An opening 13a having a large size can be formed.
　尚、開閉羽根１５とベース体１３の前面との間及び開閉羽根１５と押さえ板１４の後面との間にはそれぞれ開口１３ａに対応して位置される光透過孔を有する図示しないシートが配置され、これらのシートによって開閉羽根１５の動作の円滑化が図られている。 A sheet (not shown) having a light transmitting hole located corresponding to the opening 13a is arranged between the opening / closing blade 15 and the front surface of the base body 13 and between the opening / closing blade 15 and the rear surface of the holding plate 14, respectively. , These sheets facilitate the operation of the opening / closing blade 15.
　駆動機構１７は配置ベース２０に所要の各部が配置されて構成されている（図５、図８及び図９参照）。 The drive mechanism 17 is configured by arranging the required parts on the arrangement base 20 (see FIGS. 5, 8 and 9).
　配置ベース２０は前後方向を向く縦長の板状に形成されている。配置ベース２０には下端寄りの位置に軸動作孔２０ａが形成されている（図８及び図９参照）。配置ベース２０はベース体１３の取付部１９に後方から取り付けられる。 The arrangement base 20 is formed in a vertically long plate shape facing the front-rear direction. A shaft operating hole 20a is formed in the arrangement base 20 at a position near the lower end (see FIGS. 8 and 9). The arrangement base 20 is attached to the attachment portion 19 of the base body 13 from the rear.
　配置ベース２０にはバネ支持シャフト２１とローターシャフト２２と駆動シャフト２３とロックシャフト２４が取り付けられている。バネ支持シャフト２１とローターシャフト２２と駆動シャフト２３とロックシャフト２４はそれぞれ配置ベース２０から後方に突出されている。配置ベース２０の後面にはブレーキ支持軸２５とストッパー２６が取り付けられ、ブレーキ支持軸２５とストッパー２６は軸動作孔２０ａの周囲に位置されている。 A spring support shaft 21, a rotor shaft 22, a drive shaft 23, and a lock shaft 24 are attached to the arrangement base 20. The spring support shaft 21, the rotor shaft 22, the drive shaft 23, and the lock shaft 24 are respectively projected rearward from the arrangement base 20. A brake support shaft 25 and a stopper 26 are attached to the rear surface of the arrangement base 20, and the brake support shaft 25 and the stopper 26 are located around the shaft operating hole 20a.
　駆動機構１７には磁気駆動部２７が設けられている。磁気駆動部２７は取付板２８と第１のヨーク２９と第２のヨーク３０とコイル３１とマグネット３２を有している。 The drive mechanism 17 is provided with a magnetic drive unit 27. The magnetic drive unit 27 has a mounting plate 28, a first yoke 29, a second yoke 30, a coil 31, and a magnet 32.
　取付板２８は前後方向を向く状態にされ、取付板２８に第１のヨーク２９と第２のヨーク３０が取り付けられている。 The mounting plate 28 is oriented in the front-rear direction, and the first yoke 29 and the second yoke 30 are attached to the mounting plate 28.
　第１のヨーク２９には前後に貫通されたマグネット配置孔２９ａが形成されている。第１のヨーク２９は配置ベース２０の後面における上半部に取り付けられる。第２のヨーク３０は上下方向を向く板状に形成された基部３０ａと基部３０ａから下方に突出された芯部３０ｂとを有し、基部３０ａが第１のヨーク２９の上方に位置されている。コイル３１は芯部３０ｂに巻き付けられた状態で配置され、ステーターとして機能する。 The first yoke 29 is formed with magnet arrangement holes 29a penetrating the front and rear. The first yoke 29 is attached to the upper half of the rear surface of the placement base 20. The second yoke 30 has a base portion 30a formed in a plate shape facing in the vertical direction and a core portion 30b protruding downward from the base portion 30a, and the base portion 30a is located above the first yoke 29. .. The coil 31 is arranged in a state of being wound around the core portion 30b, and functions as a stator.
　マグネット３２はローターとして機能し、軸方向が前後方向にされた円筒状に形成されている（図１０及び図１１参照）。マグネット３２の軸方向における一端面にはローターギヤ３３が取り付けられている。マグネット３２とローターギヤ３３はローターシャフト２２に支持され、ローターシャフト２２を支点として一体になって回転可能にされている。マグネット３２は第１のヨーク２９が配置ベース２０に取り付けられた状態において、マグネット配置孔２９ａに挿入されて配置される。 The magnet 32 functions as a rotor and is formed in a cylindrical shape with the axial direction in the front-rear direction (see FIGS. 10 and 11). A rotor gear 33 is attached to one end surface of the magnet 32 in the axial direction. The magnet 32 and the rotor gear 33 are supported by the rotor shaft 22, and are integrally rotatable around the rotor shaft 22 as a fulcrum. The magnet 32 is inserted into the magnet placement hole 29a and placed in a state where the first yoke 29 is attached to the placement base 20.
　上記のように構成された磁気駆動部２７において、コイル３１に電流が供給されると、電流の方向に応じた方向へマグネット３２とローターギヤ３３が一体になって回転される。マグネット３２とローターギヤ３３は駆動体３４と同期して回転される。 In the magnetic drive unit 27 configured as described above, when a current is supplied to the coil 31, the magnet 32 and the rotor gear 33 are integrally rotated in a direction corresponding to the direction of the current. The magnet 32 and the rotor gear 33 are rotated in synchronization with the drive body 34.
　駆動体３４は駆動ギヤ３５と駆動レバー３６と被支持軸部３７を有し回動可能にされている。 The drive body 34 has a drive gear 35, a drive lever 36, and a supported shaft portion 37, and is rotatable.
　駆動ギヤ３５は平ギヤである。駆動ギヤ３５には外周部の一部から後方に突出されることによりバネ掛け部３５ａが設けられている。 The drive gear 35 is a spur gear. The drive gear 35 is provided with a spring hooking portion 35a by projecting rearward from a part of the outer peripheral portion.
　駆動レバー３６は所定の形状の板状に形成され、一方向に延びる結合ベース３６ａと結合ベース３６ａの長手方向における中央部から突出された突部３６ｂとを有している。結合ベース３６ａの長手方向における一端部には図示しない貫通孔が形成されている。突部３６ｂは結合ベース３６ａに直交する方向へ突出されている。結合ベース３６ａの長手方向における他端部には前方に突出された連結軸３８が取り付けられている。突部３６ｂには前方に突出された戻し軸３９が取り付けられている。結合ベース３６ａの長手方向における他端部には切欠が形成され、この切欠によって被ロック部３６ｃが形成されている。結合ベース３６ａの被ロック部３６ｃ側の端縁は摺動傾斜縁３６ｄとして形成されている。 The drive lever 36 is formed in a plate shape having a predetermined shape, and has a coupling base 36a extending in one direction and a protrusion 36b protruding from the central portion in the longitudinal direction of the coupling base 36a. A through hole (not shown) is formed at one end of the coupling base 36a in the longitudinal direction. The protrusion 36b projects in a direction orthogonal to the coupling base 36a. A connecting shaft 38 projecting forward is attached to the other end of the coupling base 36a in the longitudinal direction. A return shaft 39 projecting forward is attached to the protrusion 36b. A notch is formed at the other end of the coupling base 36a in the longitudinal direction, and the locked portion 36c is formed by this notch. The edge of the coupling base 36a on the locked portion 36c side is formed as a sliding inclined edge 36d.
　駆動レバー３６は結合ベース３６ａの一端部が駆動ギヤ３５の後面に結合され、貫通孔が駆動ギヤ３５の中心孔に一致される。結合ベース３６ａが駆動ギヤ３５に結合された状態において、連結軸３８と戻し軸３９は駆動ギヤ３５の外周側に位置される。 One end of the coupling base 36a of the drive lever 36 is coupled to the rear surface of the drive gear 35, and the through hole coincides with the center hole of the drive gear 35. In a state where the coupling base 36a is coupled to the drive gear 35, the coupling shaft 38 and the return shaft 39 are located on the outer peripheral side of the drive gear 35.
　被支持軸部３７は軸方向が前後方向である円筒状に形成された筒状部３７ａと筒状部３７ａの軸方向における一端部から外方に張り出されたフランジ部３７ｂとを有している。被支持軸部３７はフランジ部３７ｂが結合ベース３６ａの一端部に結合され、駆動ギヤ３５と同軸上に位置される。 The supported shaft portion 37 has a cylindrical portion 37a formed in a cylindrical shape whose axial direction is the front-rear direction, and a flange portion 37b protruding outward from one end portion in the axial direction of the tubular portion 37a. There is. The supported shaft portion 37 has a flange portion 37b coupled to one end of the coupling base 36a and is positioned coaxially with the drive gear 35.
　駆動体３４は走行バネ４０によって回動方向における一方向へ付勢されている。走行バネ４０は、例えば、捩じりコイルバネであり、被支持軸部３７の筒状部３７ａに支持されている。走行バネ４０は、一端部が磁気駆動部２７における、例えば、取付板２８の一部に係合され、他端部が駆動ギヤ３５のバネ掛け部３５ａに係合される。 The drive body 34 is urged in one direction in the rotation direction by the traveling spring 40. The traveling spring 40 is, for example, a torsion coil spring, and is supported by a tubular portion 37a of a supported shaft portion 37. One end of the traveling spring 40 is engaged with, for example, a part of the mounting plate 28 in the magnetic drive unit 27, and the other end is engaged with the spring hooking portion 35a of the drive gear 35.
　駆動体３４は駆動シャフト２３に支持され、駆動シャフト２３を支点として回転可能にされる。駆動体３４は走行バネ４０によって一方の回動方向へ付勢され、駆動ギヤ３５と駆動レバー３６と被支持軸部３７が一体になって走行バネ４０の付勢力（駆動力）によって一方の回動方向へ回動可能にされる。駆動体３４は走行バネ４０の付勢力に反する方向における回動端である第１の回動端と走行バネ４０の付勢力の方向における回動端である第２の回動端との間で回動される。 The drive body 34 is supported by the drive shaft 23 and is rotatable around the drive shaft 23 as a fulcrum. The drive body 34 is urged in one rotation direction by the traveling spring 40, and the drive gear 35, the drive lever 36, and the supported shaft portion 37 are integrated and one rotation is performed by the urging force (driving force) of the traveling spring 40. It is made rotatable in the direction of movement. The drive body 34 is located between the first rotating end, which is the rotating end in the direction opposite to the urging force of the traveling spring 40, and the second rotating end, which is the rotating end in the direction of the urging force of the traveling spring 40. It is rotated.
　上記のように構成された駆動体３４は駆動ギヤ３５が磁気駆動部２７のローターギヤ３３に噛合される。従って、磁気駆動部２７のローター３２とローターギヤ３３は、駆動体３４と反対方向へ同期して回動される。 In the drive body 34 configured as described above, the drive gear 35 is meshed with the rotor gear 33 of the magnetic drive unit 27. Therefore, the rotor 32 and the rotor gear 33 of the magnetic drive unit 27 are rotated in synchronization with the drive body 34 in the opposite direction.
　駆動体３４が駆動シャフト２３に支持された状態において、駆動レバー３６に取り付けられた連結軸３８が配置ベース２０の軸動作孔２０ａから前方に突出される。 In a state where the drive body 34 is supported by the drive shaft 23, the connecting shaft 38 attached to the drive lever 36 projects forward from the shaft operation hole 20a of the arrangement base 20.
　駆動機構１７にはロック動作ユニット４１が設けられている（図８及び図９参照）。ロック動作ユニット４１はロック解除体４２とロック部材４３を有している（図１２及び図１３参照）。 The drive mechanism 17 is provided with a lock operation unit 41 (see FIGS. 8 and 9). The locking operation unit 41 has an unlocking body 42 and a locking member 43 (see FIGS. 12 and 13).
　ロック解除体４２は解除ベース４４と吸着片４５を有し、ロック保持位置とロック解除位置の間で回動可能にされている。 The unlocking body 42 has an unlocking base 44 and a suction piece 45, and is rotatable between a lock holding position and an unlocking position.
　解除ベース４４は略上下方向を向く板状のベース面部４６とベース面部４６に対して上方に折り曲げられた第１の支持面部４７とベース面部４６に対して上方に折り曲げられた第２の支持面部４８とを有し、第１の支持面部４７と第２の支持面部４８が前後で対向して位置され、第１の支持面部４７が第２の支持面部４８の後方に位置されている。 The release base 44 has a plate-shaped base surface portion 46 that faces substantially vertically, a first support surface portion 47 that is bent upward with respect to the base surface portion 46, and a second support surface portion that is bent upward with respect to the base surface portion 46. The first support surface portion 47 and the second support surface portion 48 are positioned so as to face each other in the front-rear direction, and the first support surface portion 47 is located behind the second support surface portion 48.
　第１の支持面部４７の一部はベース面部４６から側方に突出された第１のバネ受け部４７ａとして設けられ、第２の支持面部４８の一部はベース面部４６から側方に突出された第２のバネ受け部４８ａとして設けられ、第１のバネ受け部４７ａと第２のバネ受け部４８ａとが前後で対向して位置されている。第２の支持面部４８の他の一部はベース面部４６から側方における第２のバネ受け部４８ａと反対方向に突出され、この突出された部分が解除受け部４８ｂとして設けられている。第１の支持面部４７には解除受け部４８ｂから下方に突出された規制突部４８ｃが設けられている。 A part of the first support surface portion 47 is provided as a first spring receiving portion 47a projecting laterally from the base surface portion 46, and a part of the second support surface portion 48 projects laterally from the base surface portion 46. It is provided as a second spring receiving portion 48a, and the first spring receiving portion 47a and the second spring receiving portion 48a are positioned so as to face each other in the front-rear direction. The other part of the second support surface portion 48 is projected from the base surface portion 46 in the direction opposite to the second spring receiving portion 48a on the side, and this protruding portion is provided as the release receiving portion 48b. The first support surface portion 47 is provided with a regulation protrusion 48c protruding downward from the release receiving portion 48b.
　第１のバネ受け部４７ａと第２のバネ受け部４８ａにはそれぞれ略円筒状の第１のバネ支持部材４９と第２のバネ支持部材５０が取り付けられている。 A substantially cylindrical first spring support member 49 and a second spring support member 50 are attached to the first spring receiving portion 47a and the second spring receiving portion 48a, respectively.
　第１のバネ支持部材４９にはロック解除バネ５１が支持されている。ロック解除バネ５１は、例えば、捩じりコイルバネであり、一端部が配置ベース２０に取り付けられたバネ支持シャフト２１に係合され他端部が第１の支持面部４７に係合されている。 The unlocking spring 51 is supported by the first spring supporting member 49. The unlocking spring 51 is, for example, a torsion coil spring, one end of which is engaged with a spring support shaft 21 attached to the arrangement base 20, and the other end of which is engaged with a first support surface portion 47.
　吸着片４５は磁性金属材料によって形成され、固定軸５２を介して解除ベース４４のベース面部４６に固定されている。吸着片４５はベース面部４６の左右方向における一端部の上面側に位置されている。 The suction piece 45 is formed of a magnetic metal material and is fixed to the base surface portion 46 of the release base 44 via the fixed shaft 52. The suction piece 45 is located on the upper surface side of one end portion of the base surface portion 46 in the left-right direction.
　ロック部材４３は解除ベース４４の前側において第２の支持面部４８に対向して位置された被支持板部５３と被支持板部５３に対して直交し解除ベース４４の下側においてベース面部４６の前端部に対向して位置された被押圧板部５４とを有している。被支持板部５３には前後に貫通された軸挿通孔５３ａが形成されている。被支持板部５３には下方に突出されたロック部５３ｂが設けられている。ロック部材４３はロック位置と非ロック位置の間で回動可能にされている。 The lock member 43 is orthogonal to the supported plate portion 53 and the supported plate portion 53 located on the front side of the release base 44 facing the second support surface portion 48, and the base surface portion 46 is located on the lower side of the release base 44. It has a pressed plate portion 54 positioned so as to face the front end portion. A shaft insertion hole 53a is formed in the supported plate portion 53 through the front and rear. The supported plate portion 53 is provided with a lock portion 53b protruding downward. The lock member 43 is rotatable between a locked position and a non-locked position.
　第２のバネ支持部材５０にはロックバネ５５が支持されている。ロックバネ５５のバネ力はロック解除バネ５１のバネ力より小さくされている。ロックバネ５５は、例えば、捩じりコイルバネであり、一端部が解除ベース４４の第２の支持面部４８に係合され他端部がロック部材４３の被支持板部５３に係合されている。 A lock spring 55 is supported by the second spring support member 50. The spring force of the lock spring 55 is smaller than the spring force of the unlock spring 51. The lock spring 55 is, for example, a torsion coil spring, one end of which is engaged with the second support surface portion 48 of the release base 44, and the other end of which is engaged with the supported plate portion 53 of the lock member 43.
　ロック動作ユニット４１は配置ベース２０に取り付けられたロックシャフト２４がロック部材４３の軸挿通孔５３ａと第１のバネ支持部材４９と第２のバネ支持部材５０に挿入されることによりロックシャフト２４に支持され、ロックシャフト２４を支点としてロック解除体４２とロック部材４３が各別に回動可能にされている。 The lock operation unit 41 is inserted into the lock shaft 24 by inserting the lock shaft 24 attached to the arrangement base 20 into the shaft insertion hole 53a of the lock member 43, the first spring support member 49, and the second spring support member 50. It is supported, and the unlocking body 42 and the locking member 43 are individually rotatable around the lock shaft 24 as a fulcrum.
　ロック動作ユニット４１がロックシャフト２４を支点として回動可能にされた状態において、ロック解除体４２はロック解除バネ５１によってベース面部４６がロック部材４３の被押圧部板５４に近付く方向へ付勢され、ロック部材４３はロックバネ５５によって被押圧部板５４がベース面部４６に近付く方向へ付勢される。従って、ロック解除バネ５１とロックバネ５５の付勢方向はロック動作ユニット４１の回動方向において反対方向にされており、ロック解除体４２とロック部材４３に回動方向において付勢力以外の力が付与されていない状態においては、ロック解除体４２の規制突部４８ｃにロック部材４３の被押圧板部５４が押し付けられた状態にされる。 In a state where the lock operation unit 41 is rotatable around the lock shaft 24 as a fulcrum, the lock release body 42 is urged by the lock release spring 51 in a direction in which the base surface portion 46 approaches the pressed portion plate 54 of the lock member 43. The lock member 43 is urged by the lock spring 55 in the direction in which the pressed portion plate 54 approaches the base surface portion 46. Therefore, the urging directions of the lock release spring 51 and the lock spring 55 are opposite to each other in the rotation direction of the lock operation unit 41, and a force other than the urging force is applied to the lock release body 42 and the lock member 43 in the rotation direction. In the unlocked state, the pressed plate portion 54 of the lock member 43 is pressed against the regulation protrusion 48c of the unlocking body 42.
　ロック解除体４２は吸着片４５が電磁石５６に吸着可能にされている。電磁石５６は二股状に形成された磁力発生部５７と一対のコイル部５８、５８とを有している。磁力発生部５７は二股状の部分が前後に並ぶ一対の吸着部５７ａ、５７ａとして設けられ、コイル部５８、５８がそれぞれ吸着部５７ａ、５７ａに巻き付けられている。 In the unlocking body 42, the suction piece 45 can be attracted to the electromagnet 56. The electromagnet 56 has a magnetic force generating portion 57 formed in a bifurcated shape and a pair of coil portions 58, 58. The magnetic force generating portion 57 is provided as a pair of suction portions 57a and 57a in which bifurcated portions are lined up in the front-rear direction, and the coil portions 58 and 58 are wound around the suction portions 57a and 57a, respectively.
　電磁石５６は、例えば、取付板２８に取り付けられている。ロック解除体４２は吸着部５７ａ、５７ａの先端面が吸着片４５の上面に対向して位置されている。電磁石５６においては、コイル部５８、５８に通電されることにより吸着片４５に対する吸着力が消失し、コイル部５８、５８に対する通電が停止されることにより吸着片４５に対する吸着力が発生する。 The electromagnet 56 is attached to, for example, the mounting plate 28. The unlocked body 42 is positioned so that the tip surfaces of the suction portions 57a and 57a face the upper surface of the suction piece 45. In the electromagnet 56, the suction force on the suction piece 45 disappears when the coil portions 58 and 58 are energized, and the suction force on the suction piece 45 is generated when the energization on the coil portions 58 and 58 is stopped.
　駆動機構１７にはブレーキレバー５９が設けられている（図８及び図９参照）。ブレーキレバー５９は略Ｖ字状に形成され、配置ベース２０に取り付けられたブレーキ支持軸２５を支点として回動可能にされている。ブレーキレバー５９は駆動体３４の減速を開始する減速開始位置と回動が停止される回動停止位置との間で回動される。 The drive mechanism 17 is provided with a brake lever 59 (see FIGS. 8 and 9). The brake lever 59 is formed in a substantially V shape and is rotatable around a brake support shaft 25 attached to the arrangement base 20 as a fulcrum. The brake lever 59 is rotated between the deceleration start position at which the drive body 34 starts deceleration and the rotation stop position at which the rotation is stopped.
　ブレーキレバー５９はＶ字の屈曲部分がブレーキ支持軸２５に支持されている。ブレーキレバー５９は、ブレーキ支持軸２５に支持された部分から一方に延びる部分がブレーキアーム６０として設けられ、ブレーキ支持軸２５に支持された部分から他方に延びる部分が作用アーム６１として設けられている。作用アーム６１の先端部には押圧軸６２が、例えば、回転可能に支持されている。 The V-shaped bent portion of the brake lever 59 is supported by the brake support shaft 25. The brake lever 59 is provided with a portion extending from the portion supported by the brake support shaft 25 to one side as a brake arm 60, and a portion extending from the portion supported by the brake support shaft 25 to the other side as an action arm 61. .. A pressing shaft 62 is rotatably supported at the tip of the acting arm 61, for example.
　ブレーキレバー５９はブレーキ支持軸２５に与圧バネ６３を介して支持ピン６４によって支持されている。従って、ブレーキレバー５９は与圧バネ６３によって配置ベース２０に一定の負荷が付与された状態で支持され、与圧バネ６３によって発生する配置ベース２０との間の摩擦力より大きな回動力が付与されたときに配置ベース２０に対して回動される。 The brake lever 59 is supported by a support pin 64 via a pressurizing spring 63 on the brake support shaft 25. Therefore, the brake lever 59 is supported by the pressurization spring 63 in a state where a constant load is applied to the arrangement base 20, and a rotational force larger than the frictional force with the arrangement base 20 generated by the pressurization spring 63 is applied. At that time, it is rotated with respect to the arrangement base 20.
　上記のように駆動体３４とロック動作ユニット４１とブレーキレバー５９が配置ベース２０に対して回動可能に支持された状態において、磁気駆動部２７の第１のヨーク２９と第２のヨーク３０が配置ベース２０の上半部に取り付けられる。このとき、上記したように、マグネット３２は第１のヨーク２９のマグネット配置孔２９ａに挿入され、駆動レバー３６に取り付けられた連結軸３８と戻し軸３９は配置ベース２０の軸動作孔２０ａから前方に突出される（図５参照）。 In a state where the drive body 34, the lock operation unit 41, and the brake lever 59 are rotatably supported with respect to the arrangement base 20 as described above, the first yoke 29 and the second yoke 30 of the magnetic drive unit 27 are It is attached to the upper half of the placement base 20. At this time, as described above, the magnet 32 is inserted into the magnet arrangement hole 29a of the first yoke 29, and the connecting shaft 38 and the return shaft 39 attached to the drive lever 36 are forward from the shaft operation hole 20a of the arrangement base 20. (See FIG. 5).
　また、配置ベース２０は、上記したように、ベース体１３の取付部１９に後方から取り付けられ、連結軸３８がベース体１３の軸移動孔１９ｂから前方に突出され押さえ板１４の逃げ孔１４ｂに挿入される。連結軸３８は一方のリンク１６に形成された連結孔１６ｂに挿入される。従って、駆動体３４が回動されると連結軸３８が移動され、リンク１６、１６が平行な状態を保持したままで回動され、駆動体３４の回動に伴ってセクター１５ａ、１５ａ、・・・が略上下方向へ移動される。 Further, as described above, the arrangement base 20 is attached to the mounting portion 19 of the base body 13 from the rear, and the connecting shaft 38 projects forward from the shaft moving hole 19b of the base body 13 to the escape hole 14b of the holding plate 14. Will be inserted. The connecting shaft 38 is inserted into a connecting hole 16b formed in one of the links 16. Therefore, when the drive body 34 is rotated, the connecting shaft 38 is moved, the links 16 and 16 are rotated while maintaining the parallel state, and the sectors 15a, 15a, ...・ ・ Is moved in the vertical direction.
　＜羽根開閉装置の動作＞
　以下に、羽根開閉装置１１における動作について説明する（図１４乃至図１８参照）。 <Operation of blade switchgear>
The operation of the blade opening / closing device 11 will be described below (see FIGS. 14 to 18).
　先ず、駆動機構１７における各部の初期状態について説明する（図１４参照）。 First, the initial state of each part of the drive mechanism 17 will be described (see FIG. 14).
　撮像装置１の電源釦６が操作される前の初期状態においては、コイル３１に通電が行われておらず磁気駆動部２７に駆動力が発生しておらずマグネット３２の回転が停止された状態にされている。 In the initial state before the power button 6 of the image pickup apparatus 1 is operated, the coil 31 is not energized, the magnetic drive unit 27 is not generating a driving force, and the rotation of the magnet 32 is stopped. Has been made.
　初期状態において、電磁石５６には通電が行われておらず、磁力発生部５７に磁力が発生している。従って、磁力発生部５７によって吸着片４５が引き寄せられ、吸着部５７ａ、５７ａによって吸着片４５が吸着されている。従って、ロック解除体４２がロック保持位置に保持されている。 In the initial state, the electromagnet 56 is not energized, and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating portion 57, and the suction piece 45 is attracted by the suction portions 57a and 57a. Therefore, the unlocking body 42 is held at the lock holding position.
　このときロック部材４３にはロックバネ５５により被押圧部板５４がベース面部４６に近付く方向への付勢力が付与されており、被押圧板部５４がロック解除体４２の規制突部４８ｃに押し当てられてロック部材４３がロック位置に保持されている。 At this time, the lock member 43 is given an urging force in the direction in which the pressed portion plate 54 approaches the base surface portion 46 by the lock spring 55, and the pressed plate portion 54 presses against the regulation protrusion 48c of the unlocked body 42. The lock member 43 is held at the lock position.
　ロック部材４３がロック位置に保持されている状態において、駆動体３４における駆動レバー３６の被ロック部３６ｃがロック部材４３のロック部５３ｂに係合され、駆動体３４は走行バネ４０の付勢力に反して回動が規制されロック状態にされ第１の回動端に保持されている。従って、走行バネ４０の付勢力によって発生する駆動力が駆動体３４から開閉羽根１５に伝達されていない状態にあり、例えば、開閉羽根１５が開放位置に保持されている。 In a state where the lock member 43 is held in the locked position, the locked portion 36c of the drive lever 36 in the drive body 34 is engaged with the lock portion 53b of the lock member 43, and the drive body 34 exerts an urging force on the traveling spring 40. On the contrary, the rotation is restricted and locked, and the rotation is held at the first rotation end. Therefore, the driving force generated by the urging force of the traveling spring 40 is not transmitted from the driving body 34 to the opening / closing blade 15, for example, the opening / closing blade 15 is held in the open position.
　このとき撮像素子１２は電子幕（先幕）によって光が入射されない閉塞状態（非露光状態）にされている。 At this time, the image sensor 12 is in a closed state (non-exposure state) in which light is not incident by the electronic curtain (front curtain).
　初期状態において、ブレーキレバー５９は減速開始位置に保持されており、ブレーキアーム６０が駆動体３４の駆動レバー３６に取り付けられた連結軸３８から離隔され、作用アーム６１に取り付けられた押圧軸６２が解除ベース４４における第２の支持面部４８の解除受け部４８ｂから離隔されている。 In the initial state, the brake lever 59 is held at the deceleration start position, the brake arm 60 is separated from the connecting shaft 38 attached to the drive lever 36 of the drive body 34, and the pressing shaft 62 attached to the action arm 61 The release base 44 is separated from the release receiving portion 48b of the second support surface portion 48.
　上記した初期状態において、電磁石５６に対する通電が行われると、開閉羽根１５の開閉動作が開始される（図１５参照）。このとき開閉羽根１５の開閉動作に先立って電子幕の制御が開始される。 In the above-mentioned initial state, when the electromagnet 56 is energized, the opening / closing operation of the opening / closing blade 15 is started (see FIG. 15). At this time, the control of the electronic curtain is started prior to the opening / closing operation of the opening / closing blade 15.
　尚、撮像装置１においては、磁気駆動部２７の駆動力と走行バネ４０の駆動力の双方の駆動力によって開閉羽根１５を動作させることが可能であり、また、走行バネ４０の駆動力のみによって開閉羽根１５を動作させることも可能である。以下には、磁気駆動部２７の駆動力と走行バネ４０の駆動力の双方の駆動力によって開閉羽根１５が開放位置から閉塞位置まで回動される例を説明する。また、開閉羽根１５の閉塞位置から開放位置までの動作は磁気駆動部２７の駆動力によって行われる。 In the image pickup apparatus 1, the opening / closing blade 15 can be operated by both the driving force of the magnetic driving unit 27 and the driving force of the traveling spring 40, and the opening / closing blade 15 can be operated only by the driving force of the traveling spring 40. It is also possible to operate the opening / closing blade 15. An example in which the opening / closing blade 15 is rotated from the open position to the closed position by both the driving force of the magnetic driving unit 27 and the driving force of the traveling spring 40 will be described below. Further, the operation from the closed position to the open position of the opening / closing blade 15 is performed by the driving force of the magnetic driving unit 27.
　電磁石５６に対する通電が行われると、開閉羽根１５の開放位置から閉塞位置へ向けての動作が開始される。開閉羽根１５の開放位置から閉塞位置へ向けての動作が行われるときには、電子幕と開閉羽根１５の間にスリットが形成される状態で開閉羽根１５の動作速度に応じて電子幕が制御され、形成されるスリットを介して撮像素子１２に光が入射されて露光が行われる。 When the electromagnet 56 is energized, the operation of the opening / closing blade 15 from the open position to the closed position is started. When the operation from the open position to the closed position of the opening / closing blade 15 is performed, the electronic curtain is controlled according to the operating speed of the opening / closing blade 15 in a state where a slit is formed between the electronic curtain and the opening / closing blade 15. Light is incident on the image pickup device 12 through the formed slit to perform exposure.
　電磁石５６に対する通電が行われると、磁力発生部５７に発生していた磁力が消失し、吸着部５７ａ、５７ａによる吸着片４５の吸着が解除される。従って、ロック解除体４２がロック解除バネ５１の付勢力によってロック保持位置からロック解除位置へ向けて回動されていく。 When the electromagnet 56 is energized, the magnetic force generated in the magnetic force generating unit 57 disappears, and the suction pieces 45 are released from being attracted by the suction parts 57a and 57a. Therefore, the unlocking body 42 is rotated from the lock holding position to the unlocked position by the urging force of the unlocking spring 51.
　ロック解除体４２がロック保持位置からロック解除位置へ向けて回動されていくと、ロック解除体４２の規制突部４８ｃによってロック部材４３の被押圧板部５４が押圧され、駆動体３４の被ロック部３６ｃとロック部材４３のロック部５３ｂとの係合が解除される。従って、ロック部材４３がロックバネ５５の付勢力に反してロック解除体４２と一体になってロック位置から非ロック位置へ向けて回動されていく。 When the unlocking body 42 is rotated from the lock holding position to the unlocking position, the pressing plate portion 54 of the lock member 43 is pressed by the restricting protrusion 48c of the unlocking body 42, and the driven body 34 is covered. The engagement between the lock portion 36c and the lock portion 53b of the lock member 43 is released. Therefore, the lock member 43 is integrated with the unlocking body 42 against the urging force of the lock spring 55 and is rotated from the locked position to the unlocked position.
　ロック解除位置へ向けて回動されたロック解除体４２は、一部が配置ベース２０に取り付けられ又は配置ベース２０に形成された図示しない回動規制部に接して回動が停止されロック解除位置に保持される。同時に、非ロック位置へ向けてロック解除体４２と一体になって回動されたロック部材４３は、ロック解除体４２に伴って回動が停止され非ロック位置に保持される。 The unlocked body 42 rotated toward the unlocked position is partially attached to the arrangement base 20 or comes into contact with a rotation restricting portion (not shown) formed on the arrangement base 20 to stop rotation and the unlocked position. Is held in. At the same time, the lock member 43 that has been rotated integrally with the unlocked body 42 toward the unlocked position is stopped rotating along with the unlocked body 42 and is held in the unlocked position.
　一方、駆動体３４の被ロック部３６ｃとロック部材４３のロック部５３ｂとの係合が解除されると、走行バネ４０の付勢力によって駆動体３４が第１の回動端から第２の回動端へ向けて回動され、走行バネ４０の付勢力により発生する駆動力が駆動体３４を介して開閉羽根１５に伝達され開閉羽根１５が駆動体３４の回動に伴って開放位置から閉塞位置へ向けて動作される。 On the other hand, when the locked portion 36c of the drive body 34 and the lock portion 53b of the lock member 43 are disengaged, the drive body 34 is rotated from the first rotation end to the second rotation by the urging force of the traveling spring 40. It is rotated toward the moving end, and the driving force generated by the urging force of the traveling spring 40 is transmitted to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 is closed from the open position as the driving body 34 rotates. It is operated toward the position.
　このとき電磁石５６に対する通電と同時に磁気駆動部２７のコイル３１に対する通電が行われ、ローターとして機能するマグネット３２とローターギヤ３３とが一体になって駆動体３４と反対方向へ回転され、磁気駆動部２７において発生した駆動力がローターギヤ３３から駆動体３４を介して開閉羽根１５に伝達される。従って、開閉羽根１５は磁気駆動部２７において発生する駆動力と走行バネ４０の付勢力によって発生する駆動力との双方の駆動力によって動作され、開放位置から閉塞位置へ向けて高速で動作される。 At this time, the coil 31 of the magnetic drive unit 27 is energized at the same time as the electromagnet 56 is energized, and the magnet 32 functioning as a rotor and the rotor gear 33 are integrally rotated in the direction opposite to the drive body 34, and the magnetic drive unit is energized. The driving force generated in 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34. Therefore, the opening / closing blade 15 is operated by both the driving force generated by the magnetic driving unit 27 and the driving force generated by the urging force of the traveling spring 40, and is operated at high speed from the open position to the closed position. ..
　引き続き、コイル３１に対する通電が行われ、開閉羽根１５がさらに閉塞位置へ向けて動作される（図１６参照）。 Subsequently, the coil 31 is energized, and the opening / closing blade 15 is further operated toward the closed position (see FIG. 16).
　磁気駆動部２７と駆動体３４は引き続き同期して反対方向へ回動され、駆動体３４が走行バネ４０の付勢力によって第２の回動端へ向けてさらに回動される。第２の回動端へ向けてさらに回動された駆動体３４は駆動レバー３６に取り付けられた連結軸３８が減速開始位置に保持されているブレーキレバー５９のブレーキアーム６０に接触され、ブレーキレバー５９が連結軸３８に押圧され摩擦力に反して減速開始位置から回動停止位置へ向けて回動されていく。従って、駆動体３４はブレーキレバー５９によって回動速度が第２の回動端に近付くに従って次第に低下されていき、開閉羽根１５の動作速度も閉塞位置に近付くに従って次第に低下されていく。 The magnetic drive unit 27 and the drive body 34 are continuously rotated in opposite directions in synchronization with each other, and the drive body 34 is further rotated toward the second rotation end by the urging force of the traveling spring 40. The drive body 34 further rotated toward the second rotation end is brought into contact with the brake arm 60 of the brake lever 59 whose connecting shaft 38 attached to the drive lever 36 is held at the deceleration start position, and the brake lever 59 is pressed against the connecting shaft 38 and is rotated from the deceleration start position to the rotation stop position against the frictional force. Therefore, the rotation speed of the drive body 34 is gradually reduced by the brake lever 59 as it approaches the second rotation end, and the operating speed of the opening / closing blade 15 is also gradually reduced as it approaches the closed position.
　このときブレーキレバー５９の回動により押圧軸６２がロック解除体４２の解除受け部４８ｂに接触される。ブレーキレバー５９の押圧軸６２がロック解除体４２の解除受け部４８ｂに接触されたときには、電磁石５６に対する通電が停止される。従って、再び磁力発生部５７に磁力が発生する。 At this time, the pressing shaft 62 is brought into contact with the unlocking receiving portion 48b of the unlocking body 42 by the rotation of the brake lever 59. When the pressing shaft 62 of the brake lever 59 comes into contact with the unlocking receiving portion 48b of the unlocking body 42, the energization of the electromagnet 56 is stopped. Therefore, the magnetic force is generated again in the magnetic force generating unit 57.
　さらに磁気駆動部２７と駆動体３４は同期して反対方向へ回動され、ブレーキレバー５９が連結軸３８に押圧されて引き続き回動され、ブレーキアーム６０が配置ベース２０に取り付けられたストッパー２６に接してブレーキレバー５９の回動が停止される（図１７参照）。 Further, the magnetic drive unit 27 and the drive body 34 are synchronously rotated in opposite directions, the brake lever 59 is pressed by the connecting shaft 38 and continuously rotated, and the brake arm 60 is attached to the stopper 26 attached to the arrangement base 20. The rotation of the brake lever 59 is stopped in contact with the brake lever 59 (see FIG. 17).
　ブレーキレバー５９はストッパー２６に接することにより回動停止位置に保持され、ブレーキレバー５９の回動の停止に伴って駆動体３４とマグネット３２とローターギヤ３３の回動が停止され、駆動体３４が第２の回動端に保持される。このとき磁気駆動部２７のコイル３１に対する通電が停止されている。 The brake lever 59 is held in the rotation stop position by coming into contact with the stopper 26, and the rotation of the drive body 34, the magnet 32, and the rotor gear 33 is stopped when the rotation of the brake lever 59 is stopped, and the drive body 34 is moved. It is held at the second rotating end. At this time, the energization of the coil 31 of the magnetic drive unit 27 is stopped.
　ブレーキレバー５９が連結軸３８に押圧されて回動されるときには、ブレーキレバー５９の押圧軸６２によってロック解除体４２の解除受け部４８ｂが押圧されロック解除体４２がロック解除バネ５１の付勢力に反してロック解除位置からロック保持位置へ向けて回動されていく。このときロック部材４３にはロックバネ５５の付勢力が付与されているため、ロック部材４３はロック解除体４２と一体になって非ロック位置からロック位置へ向けて回動されていく。 When the brake lever 59 is pressed by the connecting shaft 38 and rotated, the release receiving portion 48b of the unlocking body 42 is pressed by the pressing shaft 62 of the brake lever 59, and the unlocking body 42 becomes the urging force of the unlocking spring 51. On the contrary, it is rotated from the unlocked position to the locked holding position. At this time, since the urging force of the lock spring 55 is applied to the lock member 43, the lock member 43 is integrated with the unlocking body 42 and is rotated from the non-locked position to the locked position.
　尚、上記には、ブレーキレバー５９の押圧軸６２がロック解除体４２の解除受け部４８ｂに接触されたときに電磁石５６に対する通電が停止される例を示したが、ブレーキレバー５９が回動停止位置まで回動され駆動体３４が第２の回動端まで回動されたときに、電磁石５６に対する通電が停止されてもよい。 In the above example, when the pressing shaft 62 of the brake lever 59 comes into contact with the unlocking receiving portion 48b of the unlocking body 42, the energization of the electromagnet 56 is stopped, but the brake lever 59 stops rotating. When the drive body 34 is rotated to the position and the drive body 34 is rotated to the second rotation end, the energization of the electromagnet 56 may be stopped.
　上記のように駆動体３４が第２の回動端に保持されたときには、駆動体３４の回動に伴って動作された開閉羽根１５が閉塞位置に至り開閉羽根１５の開放位置から閉塞位置までの動作が終了し、ベース体１３の開口１３ａが閉塞される。 When the drive body 34 is held at the second rotating end as described above, the opening / closing blade 15 operated by the rotation of the driving body 34 reaches the closing position and from the opening position to the closing position of the opening / closing blade 15. Is completed, and the opening 13a of the base body 13 is closed.
　このとき電磁石５６に対する通電が停止されて磁力発生部５７に磁力が発生している。従って、磁力発生部５７によって吸着片４５が引き寄せられ、吸着部５７ａ、５７ａによって吸着片４５が吸着され、ロック解除体４２がロック保持位置まで回動されて初期状態に戻りロック部材４３がロック位置まで回動されて初期状態に戻る。 At this time, the energization of the electromagnet 56 is stopped and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating unit 57, the suction piece 45 is attracted by the suction parts 57a and 57a, the unlocking body 42 is rotated to the lock holding position, and the lock member 43 returns to the initial state and the lock member 43 is in the lock position. It is rotated to return to the initial state.
　開閉羽根１５の開放位置から閉塞位置までの動作が終了すると、続いて、開閉羽根１５の閉塞位置から開放位置までの動作が開始される。開閉羽根１５の閉塞位置から開放位置までの動作が開始されるときには、撮像素子１２は電子幕によって光が入射されない閉塞状態（非露光状態）にされる。 When the operation from the open position to the closed position of the opening / closing blade 15 is completed, the operation from the closed position to the open position of the opening / closing blade 15 is subsequently started. When the operation of the opening / closing blade 15 from the closed position to the open position is started, the image sensor 12 is put into a closed state (non-exposure state) in which light is not incident by the electronic curtain.
　開閉羽根１５の閉塞位置から開放位置までの動作は磁気駆動部２７のコイル３１に対して先程とは反対方向への通電が行われることにより開始される（図１８参照）。 The operation of the opening / closing blade 15 from the closed position to the open position is started by energizing the coil 31 of the magnetic drive unit 27 in the opposite direction to the previous one (see FIG. 18).
　コイル３１に反対方向への通電が行われると、磁気駆動部２７において発生した駆動力がローターギヤ３３から駆動体３４に伝達されて駆動体３４が走行バネ４０の付勢力に反して第２の回動端から第１の回動端まで回動されて初期状態に戻り、磁気駆動部２７において発生した駆動力がローターギヤ３３から駆動体３４を介して開閉羽根１５に伝達されて開閉羽根１５が閉塞位置から開放位置まで動作される。 When the coil 31 is energized in the opposite direction, the driving force generated in the magnetic driving unit 27 is transmitted from the rotor gear 33 to the driving body 34, and the driving body 34 is subjected to the second force against the urging force of the traveling spring 40. It is rotated from the rotating end to the first rotating end to return to the initial state, and the driving force generated in the magnetic drive unit 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 Is operated from the closed position to the open position.
　駆動体３４が第２の回動端から第１の回動端まで回動されるときには、駆動体３４の連結軸３８がブレーキアーム６０から離隔されるが、駆動体３４の戻し軸３９がブレーキアーム６０に連結軸３８の接触方向と反対方向から接触され、戻し軸３９によってブレーキレバー５９が回動停止位置から減速開始位置まで回動されて初期状態に戻る。ブレーキレバー５９は回動停止位置から減速開始位置へ向けて回動されることにより、押圧軸６２が解除ベース４４の解除受け部４８ｂから離隔される。 When the drive body 34 is rotated from the second rotation end to the first rotation end, the connecting shaft 38 of the drive body 34 is separated from the brake arm 60, but the return shaft 39 of the drive body 34 brakes. The arm 60 is contacted from the direction opposite to the contact direction of the connecting shaft 38, and the brake lever 59 is rotated from the rotation stop position to the deceleration start position by the return shaft 39 to return to the initial state. The brake lever 59 is rotated from the rotation stop position to the deceleration start position, so that the pressing shaft 62 is separated from the release receiving portion 48b of the release base 44.
　駆動体３４が第２の回動端から第１の回動端まで回動されるときには、ロック部材４３が非ロック位置からロック位置まで回動されており、駆動レバー３６の摺動傾斜縁３６ｄがロック部材４３のロック部５３ｂに摺動され、一旦、ロック部材４３がロックバネ５５の付勢力に反して回動される。さらに駆動体３４が第１の回動端まで回動されると、摺動傾斜縁３６ｄがロック部５３ｂを乗り越え、ロックバネ５５の付勢力によってロック部材４３が回動されて被ロック部３６ｃがロック部５３ｂに係合され、駆動体３４は走行バネ４０の付勢力に反して回動が規制されロック状態にされ第１の回動端に保持されて初期状態に戻る。 When the drive body 34 is rotated from the second rotating end to the first rotating end, the lock member 43 is rotated from the unlocked position to the locked position, and the sliding inclined edge 36d of the drive lever 36d. Is slid on the lock portion 53b of the lock member 43, and the lock member 43 is once rotated against the urging force of the lock spring 55. Further, when the drive body 34 is rotated to the first rotation end, the sliding inclined edge 36d gets over the lock portion 53b, and the lock member 43 is rotated by the urging force of the lock spring 55 to lock the locked portion 36c. Engaged with the portion 53b, the drive body 34 is restricted from rotating against the urging force of the traveling spring 40, is locked, and is held at the first rotating end to return to the initial state.
　駆動体３４が第１の回動端に保持されて初期状態に戻ったときには、コイル３１に対する反対方向への通電が停止され、磁気駆動部２７に開閉羽根１５に対する駆動力が発生していない状態にされる。 When the drive body 34 is held by the first rotating end and returns to the initial state, the energization of the coil 31 in the opposite direction is stopped, and the magnetic drive unit 27 does not generate a driving force for the opening / closing blade 15. Be made.
　上記したように、撮像装置１においては、先幕として機能する電子幕と機械的な構造として設けられ後幕として機能する開閉羽根１５との組み合わせによる所謂電子先幕シャッターの構成にされている。 As described above, the image pickup apparatus 1 has a so-called electronic front curtain shutter configuration by combining an electronic curtain that functions as a front curtain and an opening / closing blade 15 that is provided as a mechanical structure and functions as a rear curtain.
　撮像装置には、先幕と後幕をともに電子的に行う電子シャッターが用いられたものがあり、この場合には先幕は電荷のクリアで行い、後幕は連続した読み出しで行う。しかしながら、電子シャッターの場合にはセンサーの読出速度で律速されるため、動く被写体を撮影した画像が歪んでしまう所謂ローリングシャッター歪みと称される不具合を生じるおそれがある。一方、撮像装置には先幕と後幕をともに機械的に行うシャッターが用いられたものがあり、この場合には先幕の駆動機構と後幕の駆動機構の双方の駆動機構が必要になり、撮像装置の大型化や部品点数の増大を来すおそれがある。 Some imaging devices use an electronic shutter that electronically performs both the front curtain and the rear curtain. In this case, the front curtain is performed by clearing the electric charge, and the rear curtain is performed by continuous reading. However, in the case of an electronic shutter, since the speed is controlled by the reading speed of the sensor, there is a possibility that a problem called rolling shutter distortion occurs in which an image of a moving subject is distorted. On the other hand, some imaging devices use a shutter that mechanically performs both the front curtain and the rear curtain. In this case, both the drive mechanism of the front curtain and the drive mechanism of the rear curtain are required. , There is a risk that the size of the image pickup device will increase and the number of parts will increase.
　そこで、撮像装置１のように電子幕と開閉羽根１５の組み合わせによる電子先幕シャッターの構成にすることにより、撮像装置１の大型化や部品点数の増大を抑制した上でローリングシャッター歪みの発生を抑制することが可能になる。 Therefore, by configuring the electronic front curtain shutter by combining the electronic curtain and the opening / closing blade 15 like the image pickup device 1, the large size of the image pickup device 1 and the increase in the number of parts are suppressed, and the rolling shutter distortion is generated. It becomes possible to suppress.
　尚、上記には、磁気駆動部２７の駆動力と走行バネ４０の駆動力の双方の駆動力によって開閉羽根１５を開放位置から閉塞位置まで動作させる例を示したが、コイル３１への通電を行わず走行バネ４０の付勢力によって発生する駆動力のみによって開閉羽根１５を開放位置から閉塞位置まで動作させることも可能である。 In the above, an example in which the opening / closing blade 15 is operated from the open position to the closed position by both the driving force of the magnetic driving unit 27 and the driving force of the traveling spring 40 is shown, but the coil 31 is energized. It is also possible to operate the opening / closing blade 15 from the open position to the closed position only by the driving force generated by the urging force of the traveling spring 40.
　この場合に、開閉羽根１５の走行速度は磁気駆動部２７の駆動力と走行バネ４０の駆動力の双方の駆動力によって開閉羽根１５を動作させる場合よりも低速になるが、コイル３１に通電を行わない分、消費電力の低減を図ることができる。 In this case, the traveling speed of the opening / closing blade 15 is lower than the case where the opening / closing blade 15 is operated by both the driving force of the magnetic drive unit 27 and the driving force of the traveling spring 40, but the coil 31 is energized. Power consumption can be reduced as much as it is not performed.
　＜まとめ＞
　以上に記載した通り、撮像装置１及び羽根開閉装置１１にあっては、コイル３１への通電に伴って回転されるマグネット３２とマグネット３２の回転に伴って回転されるローターギヤ３３とを有する磁気駆動部２７と、ローターギヤ３３に噛合される駆動ギヤ３５を有する駆動体３４と、駆動体３４を介して開閉羽根１５に開閉方向における一方への付勢力を付与する走行バネ４０とを備え、開閉羽根１５が駆動体３４の回動動作に伴って開閉方向へ動作される。 <Summary>
As described above, in the image pickup device 1 and the blade opening / closing device 11, the magnetism having the magnet 32 rotated by energizing the coil 31 and the rotor gear 33 rotated by the rotation of the magnet 32. A drive unit 27, a drive body 34 having a drive gear 35 meshed with a rotor gear 33, and a traveling spring 40 that applies an urging force to one of the opening / closing blades 15 in the opening / closing direction via the drive body 34. The opening / closing blade 15 is operated in the opening / closing direction as the drive body 34 rotates.
　従って、コイル３１への通電に伴って発生する磁気駆動部２７の駆動力と駆動体３４における走行バネ４０の付勢力とによって開閉羽根１５の開閉動作を行うことが可能になり、磁気駆動部２７において発生する駆動力を小さくして開閉羽根１５の開閉動作を行うことができ、磁気駆動部２７の大型化や消費電力の増大を伴うことなく開閉羽根１５の走行速度の高速化を図ることができる。 Therefore, the opening / closing operation of the opening / closing blade 15 can be performed by the driving force of the magnetic driving unit 27 generated by energizing the coil 31 and the urging force of the traveling spring 40 in the driving body 34, and the magnetic driving unit 27 can be opened / closed. The opening / closing operation of the opening / closing blade 15 can be performed by reducing the driving force generated in the above, and the traveling speed of the opening / closing blade 15 can be increased without increasing the size of the magnetic drive unit 27 and increasing the power consumption. it can.
　また、磁気駆動部２７と駆動体３４が開閉羽根１５の開閉方向と同じ方向、即ち、光軸方向に直交する方向において並んで配置されている。 Further, the magnetic drive unit 27 and the drive body 34 are arranged side by side in the same direction as the opening / closing direction of the opening / closing blade 15, that is, in the direction orthogonal to the optical axis direction.
　従って、磁気駆動部２７と駆動体３４が開口１３ａを通過する光の進行方向に並ばない配置にされるため、光の進行方向における撮像装置１及び羽根開閉装置１１の小型化を図ることができる。 Therefore, since the magnetic drive unit 27 and the drive body 34 are arranged so as not to line up in the traveling direction of the light passing through the opening 13a, it is possible to reduce the size of the image pickup device 1 and the blade opening / closing device 11 in the traveling direction of the light. ..
　さらに、駆動体３４に回動支点部として機能する被支持軸部３７が設けられ、走行バネ４０として捩じりコイルバネが用いられ、走行バネ４０が被支持軸部３７に支持されている。 Further, the drive body 34 is provided with a supported shaft portion 37 that functions as a rotation fulcrum portion, a torsion coil spring is used as the traveling spring 40, and the traveling spring 40 is supported by the supported shaft portion 37.
　従って、走行バネ４０の配置スペースが小さいと共に開閉羽根１５に付与される付勢力を大きくすることが可能になるため、駆動体３４の小型化を図ることができると共に磁気駆動部２７を小型化してエネルギー効率の向上を図ることができる。 Therefore, since the arrangement space of the traveling spring 40 is small and the urging force applied to the opening / closing blade 15 can be increased, the drive body 34 can be miniaturized and the magnetic drive unit 27 can be miniaturized. Energy efficiency can be improved.
　さらにまた、ロック部５３ｂを有しロック位置と非ロック位置の間で動作されるロック部材４３が設けられ、駆動体３４に被ロック部３６ｃが形成され、ロック位置において走行バネ４０の付勢力により被ロック部３６ｃがロック部５３ｂに押し付けられることにより駆動体３４がロック部材４３にロックされる。 Furthermore, a locking member 43 having a locking portion 53b and operating between a locked position and a non-locking position is provided, a locked portion 36c is formed on the drive body 34, and the urging force of the traveling spring 40 at the locked position The drive body 34 is locked to the lock member 43 by pressing the locked portion 36c against the lock portion 53b.
　従って、走行バネ４０の付勢力によって被ロック部３６ｃがロック部５３ｂに押し付けられることにより開閉羽根１５の開閉動作の開始前の駆動体３４における初期位置が定まるため、駆動体３４の初期位置が安定し、開閉羽根１５の安定した開閉動作を確保することができる。 Therefore, the locked portion 36c is pressed against the lock portion 53b by the urging force of the traveling spring 40, so that the initial position of the drive body 34 before the start of the opening / closing operation of the opening / closing blade 15 is determined, so that the initial position of the driving body 34 is stable. Therefore, stable opening / closing operation of the opening / closing blade 15 can be ensured.
　このように羽根開閉装置１１にあっては、マグネット３２と駆動体３４の初期位置が、走行バネ４０の付勢力によって駆動体３４の被ロック部３６ｃがロック部材４３のロック部５３ｂに押し付けられることにより定められている。 In this way, in the blade opening / closing device 11, the initial positions of the magnet 32 and the drive body 34 are such that the locked portion 36c of the drive body 34 is pressed against the lock portion 53b of the lock member 43 by the urging force of the traveling spring 40. Is defined by.
　一方、磁力によってマグネット３２が第１のヨーク２９に引き寄せられることにより、マグネット３２と駆動体３４の初期位置が定められる構成にすることも可能であるが、この構成の場合には、マグネット３２と駆動体３４の初期位置がマグネット３２の着磁方向や第１のヨーク２９の形状に大きな影響を受ける。 On the other hand, it is possible to have a configuration in which the initial positions of the magnet 32 and the drive body 34 are determined by attracting the magnet 32 to the first yoke 29 by magnetic force, but in the case of this configuration, the magnet 32 and The initial position of the drive body 34 is greatly affected by the magnetizing direction of the magnet 32 and the shape of the first yoke 29.
　従って、上記のように、走行バネ４０の付勢力によって駆動体３４の被ロック部３６ｃがロック部材４３のロック部５３ｂに押し付けられることによりマグネット３２と駆動体３４の初期位置を定める構成にすることにより、マグネット３２の着磁方向や第１のヨーク２９の形状がマグネット３２と駆動体３４の初期位置に影響を及ぼすことがない。これにより、マグネット３２と駆動体３４の初期位置に関する高い位置精度が確保され、開閉羽根１５の開閉動作に関する駆動機構１７の安定した性能を確保することができる。 Therefore, as described above, the locked portion 36c of the drive body 34 is pressed against the lock portion 53b of the lock member 43 by the urging force of the traveling spring 40 to determine the initial positions of the magnet 32 and the drive body 34. Therefore, the magnetizing direction of the magnet 32 and the shape of the first yoke 29 do not affect the initial positions of the magnet 32 and the drive body 34. As a result, high positional accuracy regarding the initial positions of the magnet 32 and the drive body 34 can be ensured, and stable performance of the drive mechanism 17 regarding the opening / closing operation of the opening / closing blade 15 can be ensured.
　また、ロック保持位置とロック解除位置の間で動作されロック部材４３をロック位置と非ロック位置の間で動作させるロック解除体４２と、吸着することによりロック解除体４２をロック保持位置に保持する電磁石５６と、ロック解除体４２をロック解除位置へ向けて付勢するロック解除バネ５１とが設けられている。 Further, the unlocking body 42, which is operated between the lock holding position and the unlocking position and operates the lock member 43 between the locked position and the unlocked position, and the unlocking body 42 are held at the lock holding position by being attracted to each other. An electromagnet 56 and an unlocking spring 51 that urges the unlocking body 42 toward the unlocking position are provided.
　従って、電磁石５６によってロック解除体４２がロック保持位置に保持され、電磁石５６のロック解除体４２への作用を解除することによりロック解除体４２がロック解除バネ５１の付勢力によってロック保持位置からロック解除位置へ向けて動作させることが可能になり、ロック解除体４２のロック保持位置とロック解除位置の間での動作を簡素な機構により確実に行うことができる。 Therefore, the unlocking body 42 is held in the lock holding position by the electromagnet 56, and the unlocking body 42 is locked from the lock holding position by the urging force of the unlocking spring 51 by releasing the action of the electromagnet 56 on the unlocking body 42. It becomes possible to operate toward the release position, and the operation between the lock holding position and the unlock position of the unlock body 42 can be reliably performed by a simple mechanism.
　さらに、駆動体３４の所定の回動範囲において駆動体３４の回動速度を回動端に近付くに従って低減するブレーキレバー５９が設けられている。 Further, a brake lever 59 is provided to reduce the rotation speed of the drive body 34 as it approaches the rotation end in a predetermined rotation range of the drive body 34.
　従って、回動速度が回動端に近付くに従って低減されて駆動体３４の回動が停止されるため、駆動体３４の急減速及び駆動体３４からの各部への衝撃が抑制され、駆動体３４及び駆動体３４が接する各部の耐久性の向上を図ることができる。 Therefore, as the rotation speed approaches the rotation end, the rotation of the drive body 34 is stopped, so that the sudden deceleration of the drive body 34 and the impact from the drive body 34 to each part are suppressed, and the drive body 34 is suppressed. And the durability of each part in contact with the drive body 34 can be improved.
　さらにまた、ブレーキレバー５９が回動可能にされ、ブレーキレバー５９に駆動体３４によって押圧されるブレーキアーム６０とロック解除体４２を押圧する作用アーム６１とが設けられ、駆動体３４によるブレーキアーム６０の押圧時に作用アーム６１によってロック解除体４２が押圧されることによりロック解除体４２がロック解除位置からロック保持位置へ向けて動作される共にロック部材４３が非ロック位置からロック位置へ向けて動作される。 Furthermore, the brake lever 59 is made rotatable, and the brake lever 59 is provided with a brake arm 60 pressed by the drive body 34 and an action arm 61 for pressing the unlocked body 42, and the brake arm 60 by the drive body 34 is provided. When the lock release body 42 is pressed by the action arm 61, the unlock body 42 is operated from the unlock position to the lock holding position, and the lock member 43 is operated from the unlock position to the lock position. Will be done.
　従って、ブレーキレバー５９によって駆動体３４の減速とロック解除体４２のロック解除位置からロック保持位置へ向けての動作とが行われるため、駆動体３４の減速とロック解除体４２の動作とを行うための各別の機構を設ける必要がなく、構造の簡素化及び動作の迅速化を図ることができる。 Therefore, the brake lever 59 decelerates the drive body 34 and operates the unlocked body 42 from the unlocked position to the lock holding position. Therefore, the brake lever 59 decelerates the drive body 34 and operates the unlocked body 42. It is not necessary to provide a separate mechanism for each, and the structure can be simplified and the operation can be speeded up.
　撮像装置１及び羽根開閉装置１１にあっては、第１の回動位置から第２の回動位置へ向けて回動されるときに駆動体３４の回動速度を低減するブレーキレバー５９と、ロック位置において駆動体３４をロックするロック部材４３と、駆動体３４のロックが解除されたときにロック部材４３をロック位置から非ロック位置へ向けて動作させるロック解除バネ５１とを備え、ロック部材４３にブレーキレバー５９の回動力が付与されることによりロック部材４３が非ロック位置からロック位置へ向けて動作される。 In the image pickup device 1 and the blade opening / closing device 11, a brake lever 59 that reduces the rotation speed of the drive body 34 when the image pickup device 1 and the blade opening / closing device 11 are rotated from the first rotation position to the second rotation position, and a brake lever 59. The lock member 43 includes a lock member 43 that locks the drive body 34 at the lock position, and an unlock spring 51 that operates the lock member 43 from the lock position to the unlocked position when the drive body 34 is unlocked. By applying the rotational force of the brake lever 59 to the 43, the lock member 43 is operated from the unlocked position to the locked position.
　従って、ブレーキレバー５９によって駆動体３４の回動速度が低減されている状態においてロック部材４３にブレーキレバー５９の回動力が付与されてロック部材４３が非ロック位置からロック位置へ向けて動作される。これにより、ロック部材４３の非ロック位置からロック位置へ向けての動作がロック解除バネ５１の付勢力により回動される駆動体３４の回動中に行われるため、消費電力を低減した上でロック部材４３の非ロック位置からロック位置までの復帰動作の時間の短縮化を図ることができる。 Therefore, in a state where the rotation speed of the drive body 34 is reduced by the brake lever 59, the rotational power of the brake lever 59 is applied to the lock member 43, and the lock member 43 is operated from the unlocked position to the locked position. .. As a result, the operation of the lock member 43 from the non-locked position to the locked position is performed during the rotation of the drive body 34, which is rotated by the urging force of the unlock spring 51, so that the power consumption is reduced. It is possible to shorten the time required for the return operation of the lock member 43 from the non-locked position to the locked position.
　また、ロック部材４３にブレーキレバー５９の回動力が付与されている状態において駆動体３４の回動がブレーキレバー５９によって規制されて回動速度が低減されるため、駆動体３４に対して回動を規制する方向への力がロック部材４３からブレーキレバー５９を介して付与される。 Further, in a state where the rotational power of the brake lever 59 is applied to the lock member 43, the rotation of the drive body 34 is regulated by the brake lever 59 and the rotation speed is reduced, so that the drive body 34 rotates with respect to the drive body 34. A force is applied from the lock member 43 to the brake lever 59 in the direction of restricting the speed.
　従って、駆動体３４の回動がブレーキレバー５９から付与される力に加えロック部材４３から付与される力によっても行われるため、駆動体３４の減速効果が大きく、駆動体３４の減速を効率的かつ迅速に行うことができる。 Therefore, since the rotation of the drive body 34 is performed not only by the force applied by the brake lever 59 but also by the force applied by the lock member 43, the deceleration effect of the drive body 34 is large and the deceleration of the drive body 34 is efficient. And it can be done quickly.
　さらに、駆動電流が供給されるコイル３１とコイル３１への通電に伴って回転されるマグネット３２とを有する磁気駆動部２７が設けられ、駆動体３４又は磁気駆動部２７の少なくとも一方の駆動力によって開閉羽根１５が動作される。 Further, a magnetic drive unit 27 having a coil 31 to which a drive current is supplied and a magnet 32 that is rotated by energizing the coil 31 is provided, and is driven by at least one of the drive body 34 or the magnetic drive unit 27. The opening / closing blade 15 is operated.
　従って、開閉羽根１５が磁気駆動部２７と駆動体３４の少なくとも一方の駆動力によって開閉方向へ動作されるため、開閉羽根１５の動作制御に関する自由度が向上し、開閉羽根１５の速度を撮影態様等に応じて容易に変更することができる。 Therefore, since the opening / closing blade 15 is operated in the opening / closing direction by the driving force of at least one of the magnetic drive unit 27 and the driving body 34, the degree of freedom regarding the operation control of the opening / closing blade 15 is improved, and the speed of the opening / closing blade 15 is photographed. It can be easily changed according to the above.
　さらにまた、磁気駆動部２７にマグネット３２の回転に伴って回転されるローターギヤ３３が設けられ、駆動体３４にはローターギヤ３３に噛合される駆動ギヤ３５が設けられ、駆動体３４を介して開閉羽根１５に開閉方向における一方への付勢力を付与する走行バネ４０が設けられている。 Furthermore, the magnetic drive unit 27 is provided with a rotor gear 33 that is rotated with the rotation of the magnet 32, and the drive body 34 is provided with a drive gear 35 that is meshed with the rotor gear 33, via the drive body 34. The opening / closing blade 15 is provided with a traveling spring 40 that applies an urging force to one side in the opening / closing direction.
　従って、磁気駆動部２７におけるマグネット３２の回転により発生する駆動力と走行バネ４０の付勢力による駆動力とによって開閉羽根１５を開閉方向における一方へ動作させることが可能になるため、磁気駆動部２７の大型化や消費電力の増大を伴うことなく開閉羽根１５の走行速度の高速化を図ることができる。 Therefore, the opening / closing blade 15 can be operated in one direction in the opening / closing direction by the driving force generated by the rotation of the magnet 32 in the magnetic driving unit 27 and the driving force generated by the urging force of the traveling spring 40. It is possible to increase the traveling speed of the opening / closing blade 15 without increasing the size and power consumption of the magnet.
　＜変形例＞
　以下に、ロック動作ユニットの変形例について説明する（図１９乃至図２６参照）。尚、以下に示す変形例に係るロック動作ユニット４１Ａは上記したロック動作ユニット４１と比較して、主に、解除ベースが二つの部材によって構成されていることが相違する。従って、以下の変形例に係るロック動作ユニット４１Ａに関しては、ロック動作ユニット４１と比較して異なる部分についてのみ詳細に説明をし、その他の部分についてはロック動作ユニット４１における同様の部分に付した符号と同じ符号を付して説明は省略する。 <Modification example>
An example of modification of the lock operation unit will be described below (see FIGS. 19 to 26). The lock operation unit 41A according to the modification shown below is different from the lock operation unit 41 described above in that the release base is mainly composed of two members. Therefore, regarding the lock operation unit 41A according to the following modification, only the parts different from the lock operation unit 41 will be described in detail, and the other parts will be described with reference numerals to the same parts in the lock operation unit 41. The same reference numerals are given and the description thereof will be omitted.
　ロック動作ユニット４１Ａはロック解除体４２Ａとロック部材４３を有している（図１９及び図２０参照）。 The locking operation unit 41A has an unlocking body 42A and a locking member 43 (see FIGS. 19 and 20).
　ロック解除体４２Ａは解除ベース４４Ａと吸着片４５を有し、解除ベース４４Ａは保持レバー７１と解除アーム７２によって構成されている。保持レバー７１と解除アーム７２は同軸を支点としてそれぞれロック保持位置とロック解除位置の間で各別に回動可能にされている。 The unlocking body 42A has an unlocking base 44A and a suction piece 45, and the unlocking base 44A is composed of a holding lever 71 and an unlocking arm 72. The holding lever 71 and the release arm 72 are respectively rotatable separately between the lock holding position and the unlocking position with the coaxial as a fulcrum.
　保持レバー７１は略上下方向を向く板状のベース面部７３とベース面部７３に対して上方に折り曲げられた第１の支持面部７４とを有している。第１の支持面部７４の一部はベース面部７３から側方に突出された第１のバネ受け部７４ａとして設けられている。 The holding lever 71 has a plate-shaped base surface portion 73 that faces substantially in the vertical direction and a first support surface portion 74 that is bent upward with respect to the base surface portion 73. A part of the first support surface portion 74 is provided as a first spring receiving portion 74a protruding laterally from the base surface portion 73.
　第１のバネ受け部７４ａには略円筒状の第１のバネ支持部材７５が取り付けられている。第１のバネ支持部材７５には第１のバネ受け部７４ａの前側において戻しバネ７６が支持されている。戻しバネ７６の一端部は第１の支持面部７４に係合されている。 A substantially cylindrical first spring support member 75 is attached to the first spring receiving portion 74a. A return spring 76 is supported by the first spring support member 75 on the front side of the first spring receiving portion 74a. One end of the return spring 76 is engaged with the first support surface portion 74.
　吸着片４５はベース面部７３に固定され、ベース面部７３の左右方向における一端部の上面側に位置されている。 The suction piece 45 is fixed to the base surface portion 73 and is located on the upper surface side of one end portion in the left-right direction of the base surface portion 73.
　解除アーム７２は前後方向を向く第２の支持面部７７と第２の支持面部７７に対して後方に折り曲げられたバネ掛け面部７８とバネ掛け面部７８に対して第２の支持面部７７側に折り曲げられた押さえ面部７９とを有している。 The release arm 72 is bent rearward with respect to the second support surface portion 77 and the second support surface portion 77 facing in the front-rear direction toward the second support surface portion 77 with respect to the spring hooking surface portion 78 and the spring hooking surface portion 78. It has a pressed holding surface portion 79.
　第２の支持面部７７は保持レバー７１の第１の支持面部７４と前後で対向して位置され、第２の支持面部７７が第１の支持面部７４の前方に位置されている。第２の支持面部７７の一部は保持レバー７１の第１のバネ受け部７４ａと前後で対向して位置された第２のバネ受け部７７ａとして設けられている。第２の支持面部７７の他の一部はベース面部７３よりも側方における第２のバネ受け部７７ａと反対方向に突出され、この突出された部分が解除受け部７７ｂとして設けられている。第２の支持面部７７には下方に突出された規制突部７７ｃが設けられている。 The second support surface portion 77 is positioned so as to face the first support surface portion 74 of the holding lever 71 in the front-rear direction, and the second support surface portion 77 is located in front of the first support surface portion 74. A part of the second support surface portion 77 is provided as a second spring receiving portion 77a located so as to face the first spring receiving portion 74a of the holding lever 71 in the front-rear direction. The other part of the second support surface portion 77 is projected in the direction opposite to the second spring receiving portion 77a on the side of the base surface portion 73, and this protruding portion is provided as the release receiving portion 77b. The second support surface portion 77 is provided with a regulating protrusion 77c protruding downward.
　バネ掛け面部７８には戻しバネ７６の他端部が係合されている。従って、戻しバネ７６の両端部がそれぞれ第１の支持面部７４とバネ掛け面部７８に係合され、戻しバネ７６によって保持レバー７１と解除アーム７２にベース面部７３と押さえ面部７９が互いに近付く方向への付勢力が付与される。これにより保持レバー７１と解除アーム７２に戻しバネ７６の付勢力に反する方向への力が付与されていない状態において、ベース面部７３に押さえ面部７９が突き当てられた状態にされている。 The other end of the return spring 76 is engaged with the spring hooking surface 78. Therefore, both ends of the return spring 76 are engaged with the first support surface portion 74 and the spring hooking surface portion 78, respectively, and the return spring 76 brings the base surface portion 73 and the pressing surface portion 79 closer to the holding lever 71 and the release arm 72. Is given the urging power of. As a result, the pressing surface portion 79 is abutted against the base surface portion 73 in a state in which the holding lever 71 and the release arm 72 are not subjected to a force in a direction opposite to the urging force of the return spring 76.
　第２のバネ受け部７７ａには略円筒状の第２のバネ支持部材８０が取り付けられている。第２のバネ支持部材８０と第１のバネ支持部材７５は第１のバネ受け部７４ａと第２のバネ受け部７７ａの間で結合されている。 A substantially cylindrical second spring support member 80 is attached to the second spring receiving portion 77a. The second spring support member 80 and the first spring support member 75 are coupled between the first spring receiving portion 74a and the second spring receiving portion 77a.
　第２のバネ支持部材８０には第２のバネ受け部７７ａの後側においてロック解除バネ８１が支持されている。ロック解除バネ８１は、例えば、捩じりコイルバネであり、一端部が配置ベース２０に取り付けられたバネ支持シャフト２１に係合され他端部が第２の支持面部７７に係合されている。ロック解除バネ８１のバネ力は戻しバネ７６のバネ力より大きくされている。 The unlocking spring 81 is supported on the rear side of the second spring receiving portion 77a on the second spring supporting member 80. The unlocking spring 81 is, for example, a torsion coil spring, one end of which is engaged with a spring support shaft 21 attached to the arrangement base 20, and the other end of which is engaged with a second support surface portion 77. The spring force of the unlock spring 81 is larger than the spring force of the return spring 76.
　ロック部材４３は解除アーム７２の前側において第２の支持面部７７に対向して位置された被支持板部５３と被支持板部５３に対して直交し解除アーム７２の下側においてベース面部７３の前端部に対向して位置された被押圧板部５４とを有している。 The lock member 43 is orthogonal to the supported plate portion 53 and the supported plate portion 53 located on the front side of the release arm 72 facing the second support surface portion 77, and the base surface portion 73 is located on the lower side of the release arm 72. It has a pressed plate portion 54 positioned so as to face the front end portion.
　ロック部材４３の被支持板部５３には略円筒状の第３のバネ支持部材８２が取り付けられている。 A substantially cylindrical third spring support member 82 is attached to the supported plate portion 53 of the lock member 43.
　第３のバネ支持部材８２には第２のバネ受け部７７ａの前側においてロックバネ５５が支持されている。ロックバネ５５のバネ力はロック解除バネ８１のバネ力より小さくされている。ロックバネ５５は一端部が配置ベース２０に取り付けられたバネ支持シャフト２１に係合され他端部がロック部材４３の被支持板部５３に係合されている。 The lock spring 55 is supported on the front side of the second spring receiving portion 77a by the third spring supporting member 82. The spring force of the lock spring 55 is smaller than the spring force of the unlock spring 81. One end of the lock spring 55 is engaged with the spring support shaft 21 attached to the arrangement base 20, and the other end is engaged with the supported plate portion 53 of the lock member 43.
　ロック動作ユニット４１Ａは配置ベース２０に取り付けられたロックシャフト２４がロック部材４３の軸挿通孔５３ａと第１のバネ支持部材７５と第２のバネ支持部材８０と第３のバネ支持部材８２に挿入されることによりロックシャフト２４に支持され、ロックシャフト２４を支点として保持レバー７１と解除アーム７２とロック部材４３が各別に回動可能にされている。 In the lock operation unit 41A, the lock shaft 24 attached to the arrangement base 20 is inserted into the shaft insertion hole 53a of the lock member 43, the first spring support member 75, the second spring support member 80, and the third spring support member 82. By being supported by the lock shaft 24, the holding lever 71, the release arm 72, and the lock member 43 can be rotated separately with the lock shaft 24 as a fulcrum.
　ロック動作ユニット４１Ａがロックシャフト２４を支点として回動可能にされた状態において、解除アーム７２はロック解除バネ８１によって押さえ面部７９が保持レバー７１のベース面部７３に接する方向へ付勢され、保持レバー７１はロック解除バネ８１の付勢力が解除アーム７２を介して付与されることにより解除アーム７２と同じ方向へ付勢されている。従って、保持レバー７１と解除アーム７２はロック解除バネ８１の付勢力が付与される方向へ一体になって回動可能にされている。また、保持レバー７１は戻しバネ７６によってベース面部７３が解除アーム７２の押さえ面部７９に近付く方向へ付勢され、保持レバー７１の戻しバネ７６による付勢方向が保持レバー７１に対するロック解除バネ８１の付勢方向と反対方向にされている。 In a state where the lock operation unit 41A is rotatable around the lock shaft 24 as a fulcrum, the release arm 72 is urged by the lock release spring 81 in a direction in which the pressing surface portion 79 contacts the base surface portion 73 of the holding lever 71, and the holding lever 72. The 71 is urged in the same direction as the release arm 72 by applying the urging force of the unlock spring 81 via the release arm 72. Therefore, the holding lever 71 and the release arm 72 are integrally rotatable in the direction in which the urging force of the lock release spring 81 is applied. Further, the holding lever 71 is urged by the return spring 76 in the direction in which the base surface portion 73 approaches the holding surface portion 79 of the release arm 72, and the urging direction of the holding lever 71 by the return spring 76 is the lock release spring 81 with respect to the holding lever 71. It is in the opposite direction to the urging direction.
　ロック部材４３はロックバネ５５によって被押圧板部５４がベース面部７３に近付く方向へ付勢される。従って、ロック解除バネ８１とロックバネ５５の付勢方向はロック動作ユニット４１Ａの回動方向において反対方向にされており、ロック解除体４２Ａとロック部材４３に回動方向において付勢力以外の力が付与されていない状態においては、ロック解除体４２Ａの規制突部７７ｃにロック部材４３の被押圧板部５４が押し付けられた状態でロック解除体４２Ａとロック部材４３が保持される。 The lock member 43 is urged by the lock spring 55 in the direction in which the pressed plate portion 54 approaches the base surface portion 73. Therefore, the urging directions of the lock release spring 81 and the lock spring 55 are opposite to each other in the rotation direction of the lock operation unit 41A, and a force other than the urging force is applied to the lock release body 42A and the lock member 43 in the rotation direction. In the non-locking state, the unlocking body 42A and the locking member 43 are held in a state where the pressed plate portion 54 of the locking member 43 is pressed against the regulating protrusion 77c of the unlocking body 42A.
　＜変形例に係るロック動作ユニットが用いられた羽根開閉装置の動作＞
　以下に、変形例に係るロック動作ユニット４１Ａが用いられた羽根開閉装置１１における動作について説明する（図２１乃至図２６参照）。 <Operation of the blade switchgear using the lock operation unit according to the modified example>
The operation of the blade opening / closing device 11 in which the lock operation unit 41A according to the modified example is used will be described below (see FIGS. 21 to 26).
　先ず、駆動機構１７における各部の初期状態について説明する（図２１参照）。 First, the initial state of each part of the drive mechanism 17 will be described (see FIG. 21).
　撮像装置１の電源釦６が操作される前の初期状態においては、コイル３１に通電が行われておらず磁気駆動部２７に駆動力が発生しておらずマグネット３２の回転が停止された状態にされている。 In the initial state before the power button 6 of the image pickup apparatus 1 is operated, the coil 31 is not energized, the magnetic drive unit 27 is not generating a driving force, and the rotation of the magnet 32 is stopped. Has been made.
　初期状態において、電磁石５６には通電が行われておらず、磁力発生部５７に磁力が発生している。従って、磁力発生部５７によって吸着片４５が引き寄せられ、吸着部５７ａ、５７ａによって吸着片４５が吸着されている。従って、ロック解除体４２Ａの保持レバー７１と解除アーム７２がともにロック保持位置に保持されている。 In the initial state, the electromagnet 56 is not energized, and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating portion 57, and the suction piece 45 is attracted by the suction portions 57a and 57a. Therefore, both the holding lever 71 and the releasing arm 72 of the unlocking body 42A are held at the locking holding position.
　このときロック部材４３にはロックバネ５５により被押圧部板５４がベース面部７３に近付く方向への付勢力が付与されており、被押圧板部５４が解除アーム７２の規制突部７７ｃに押し当てられてロック部材４３がロック位置に保持されている。 At this time, the lock member 43 is given an urging force in the direction in which the pressed portion plate 54 approaches the base surface portion 73 by the lock spring 55, and the pressed plate portion 54 is pressed against the regulation protrusion 77c of the release arm 72. The lock member 43 is held in the locked position.
　ロック部材４３がロック位置に保持されている状態において、駆動体３４における駆動レバー３６の被ロック部３６ｃがロック部材４３のロック部５３ｂに係合され、駆動体３４は走行バネ４０の付勢力に反して回動が規制されロック状態にされ第１の回動端に保持されている。従って、走行バネ４０の付勢力によって発生する駆動力が駆動体３４から開閉羽根１５に伝達されていない状態にあり、例えば、開閉羽根１５が開放位置に保持されている。 In a state where the lock member 43 is held in the locked position, the locked portion 36c of the drive lever 36 in the drive body 34 is engaged with the lock portion 53b of the lock member 43, and the drive body 34 exerts an urging force on the traveling spring 40. On the contrary, the rotation is restricted and locked, and the rotation is held at the first rotation end. Therefore, the driving force generated by the urging force of the traveling spring 40 is not transmitted from the driving body 34 to the opening / closing blade 15, for example, the opening / closing blade 15 is held in the open position.
　このとき撮像素子１２は電子幕（先幕）によって光が入射されない閉塞状態（非露光状態）にされている。 At this time, the image sensor 12 is in a closed state (non-exposure state) in which light is not incident by the electronic curtain (front curtain).
　初期状態において、ブレーキレバー５９は減速開始位置に保持されており、ブレーキアーム６０が駆動体３４の駆動レバー３６から離隔され、作用アーム６１に取り付けられた押圧軸６２が解除アーム７２における第２の支持面部７７の解除受け部７７ｂから離隔されている。 In the initial state, the brake lever 59 is held at the deceleration start position, the brake arm 60 is separated from the drive lever 36 of the drive body 34, and the pressing shaft 62 attached to the action arm 61 is the second release arm 72. It is separated from the release receiving portion 77b of the support surface portion 77.
　上記した初期状態において、電磁石５６に対する通電が行われると、開閉羽根１５の開閉動作が開始される（図２２参照）。開閉羽根１５の開閉動作と同時に電子幕の制御も開始される。 In the above-mentioned initial state, when the electromagnet 56 is energized, the opening / closing operation of the opening / closing blade 15 is started (see FIG. 22). The control of the electronic curtain is also started at the same time as the opening / closing operation of the opening / closing blade 15.
　電磁石５６に対する通電が行われると、開閉羽根１５の開放位置から閉塞位置へ向けての動作が開始される。開閉羽根１５の開放位置から閉塞位置へ向けての動作が行われるときには、電子幕と開閉羽根１５の間にスリットが形成される状態で開閉羽根１５の動作速度に応じて電子幕が制御され、形成されるスリットを介して撮像素子１２に光が入射されて露光が行われる。 When the electromagnet 56 is energized, the operation of the opening / closing blade 15 from the open position to the closed position is started. When the operation from the open position to the closed position of the opening / closing blade 15 is performed, the electronic curtain is controlled according to the operating speed of the opening / closing blade 15 in a state where a slit is formed between the electronic curtain and the opening / closing blade 15. Light is incident on the image pickup device 12 through the formed slit to perform exposure.
　電磁石５６に対する通電が行われると、磁力発生部５７に発生していた磁力が消失し、吸着部５７ａ、５７ａによる吸着片４５の吸着が解除される。従って、保持レバー７１と解除アーム７２が一体になってロック解除バネ８１の付勢力によってロック保持位置からロック解除位置へ向けて回動されていく。 When the electromagnet 56 is energized, the magnetic force generated in the magnetic force generating unit 57 disappears, and the suction pieces 45 are released from being attracted by the suction parts 57a and 57a. Therefore, the holding lever 71 and the release arm 72 are integrally rotated by the urging force of the lock release spring 81 from the lock holding position to the lock release position.
　保持レバー７１と解除アーム７２がロック保持位置からロック解除位置へ向けて回動されていくと、解除アーム７２の規制突部７７ｃによってロック部材４３の被押圧板部５４が押圧され、駆動体３４における被ロック部３６ｃのロック部材４３のロック部５３ｂに対する係合が解除される。従って、ロック部材４３がロックバネ５５の付勢力に反して保持レバー７１と解除アーム７２によって構成されたロック解除体４２Ａと一体になってロック位置から非ロック位置へ向けて回動されていく。 When the holding lever 71 and the release arm 72 are rotated from the lock holding position to the lock release position, the pressure plate portion 54 of the lock member 43 is pressed by the regulation protrusion 77c of the release arm 72, and the drive body 34 The engagement of the lock member 43 of the locked portion 36c with respect to the lock portion 53b is released. Therefore, the lock member 43 is integrally rotated with the unlocking body 42A composed of the holding lever 71 and the unlocking arm 72 against the urging force of the lock spring 55 from the locked position to the unlocked position.
　ロック解除位置へ向けて回動された保持レバー７１と解除アーム７２は、何れかの一部が配置ベース２０に取り付けられ又は配置ベース２０に形成された図示しない回動規制部に接して回動が停止されロック解除位置に保持される。同時に、非ロック位置へ向けてロック解除体４２Ａと一体になって回動されたロック部材４３は、ロック解除体４２Ａに伴って回動が停止され非ロック位置に保持される。 The holding lever 71 and the release arm 72 that have been rotated toward the unlocked position rotate in contact with a rotation restricting portion (not shown) that is partially attached to the arrangement base 20 or formed on the arrangement base 20. Is stopped and held in the unlocked position. At the same time, the lock member 43 that has been rotated integrally with the unlocked body 42A toward the unlocked position is stopped rotating along with the unlocked body 42A and is held in the unlocked position.
　一方、駆動体３４の被ロック部３６ｃとロック部材４３のロック部５３ｂとの係合が解除されると、走行バネ４０の付勢力によって駆動体３４が第１の回動端から第２の回動端へ向けて回動され、走行バネ４０の付勢力によって発生する駆動力が駆動体３４を介して開閉羽根１５に伝達され開閉羽根１５が駆動体３４の回動に伴って開放位置から閉塞位置へ向けて動作される。 On the other hand, when the locked portion 36c of the drive body 34 and the lock portion 53b of the lock member 43 are disengaged, the drive body 34 is rotated from the first rotation end to the second rotation by the urging force of the traveling spring 40. It is rotated toward the moving end, and the driving force generated by the urging force of the traveling spring 40 is transmitted to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 is closed from the open position as the driving body 34 rotates. It is operated toward the position.
　このとき電磁石５６に対する通電と同時に磁気駆動部２７のコイル３１に対する通電が行われ、ローターとして機能するマグネット３２とローターギヤ３３とが一体になって駆動体３４と反対方向へ回転され、磁気駆動部２７において発生した駆動力がローターギヤ３３から駆動体３４を介して開閉羽根１５に伝達される。従って、開閉羽根１５は磁気駆動部２７において発生する駆動力と走行バネ４０の付勢力によって発生する駆動力との双方の駆動力によって動作され、開放位置から閉塞位置へ向けて高速で動作される。 At this time, the coil 31 of the magnetic drive unit 27 is energized at the same time as the electromagnet 56 is energized, and the magnet 32 functioning as a rotor and the rotor gear 33 are integrally rotated in the direction opposite to the drive body 34, and the magnetic drive unit is energized. The driving force generated in 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34. Therefore, the opening / closing blade 15 is operated by both the driving force generated by the magnetic driving unit 27 and the driving force generated by the urging force of the traveling spring 40, and is operated at high speed from the open position to the closed position. ..
　引き続き、コイル３１に対する通電が行われ、開閉羽根１５がさらに閉塞位置へ向けての動作される（図２３参照）。 Subsequently, the coil 31 is energized, and the opening / closing blade 15 is further operated toward the closed position (see FIG. 23).
　磁気駆動部２７と駆動体３４は引き続き同期して反対方向へ回動され、駆動体３４が走行バネ４０の付勢力によって第２の回動端へ向けてさらに回動される。第２の回動端へ向けてさらに回動された駆動体３４は駆動レバー３６に取り付けられた連結軸３８が減速開始位置に保持されているブレーキレバー５９のブレーキアーム６０に接触され、ブレーキレバー５９が連結軸３８に押圧され摩擦力に反して減速開始位置から回動停止位置へ向けて回動されていく。従って、駆動体３４はブレーキレバー５９によって回動速度が第２の回動端に近付くに従って次第に低下されていき、開閉羽根１５の動作速度も閉塞位置に近付くに従って次第に低下されていく。 The magnetic drive unit 27 and the drive body 34 are continuously rotated in opposite directions in synchronization with each other, and the drive body 34 is further rotated toward the second rotation end by the urging force of the traveling spring 40. The drive body 34 further rotated toward the second rotation end is brought into contact with the brake arm 60 of the brake lever 59 whose connecting shaft 38 attached to the drive lever 36 is held at the deceleration start position, and the brake lever 59 is pressed against the connecting shaft 38 and is rotated from the deceleration start position to the rotation stop position against the frictional force. Therefore, the rotation speed of the drive body 34 is gradually reduced by the brake lever 59 as it approaches the second rotation end, and the operating speed of the opening / closing blade 15 is also gradually reduced as it approaches the closed position.
　このときブレーキレバー５９の回動により押圧軸６２が解除アーム７２の解除受け部７７ｂに接触される。ブレーキレバー５９の押圧軸６２が解除アーム７２の解除受け部７７ｂに接触されたときには、電磁石５６に対する通電が停止される。従って、再び磁力発生部５７に磁力が発生する。 At this time, the pressing shaft 62 is brought into contact with the release receiving portion 77b of the release arm 72 by the rotation of the brake lever 59. When the pressing shaft 62 of the brake lever 59 comes into contact with the release receiving portion 77b of the release arm 72, the energization of the electromagnet 56 is stopped. Therefore, the magnetic force is generated again in the magnetic force generating unit 57.
　さらに磁気駆動部２７と駆動体３４は同期して反対方向へ回動され、ブレーキレバー５９が連結軸３８に押圧されて引き続き回動され、ブレーキアーム６０が配置ベース２０に取り付けられたストッパー２６に接してブレーキレバー５９の回動が停止される（図２４参照）。 Further, the magnetic drive unit 27 and the drive body 34 are synchronously rotated in opposite directions, the brake lever 59 is pressed by the connecting shaft 38 and continuously rotated, and the brake arm 60 is attached to the stopper 26 attached to the arrangement base 20. The rotation of the brake lever 59 is stopped in contact with the brake lever 59 (see FIG. 24).
　ブレーキレバー５９はストッパー２６に接することにより回動停止位置に保持され、ブレーキレバー５９の回動の停止に伴って駆動体３４とマグネット３２とローターギヤ３３の回動が停止され、駆動体３４が第２の回動端に保持される。このとき磁気駆動部２７のコイル３１に対する通電が停止されている。 The brake lever 59 is held in the rotation stop position by coming into contact with the stopper 26, and the rotation of the drive body 34, the magnet 32, and the rotor gear 33 is stopped when the rotation of the brake lever 59 is stopped, and the drive body 34 is moved. It is held at the second rotating end. At this time, the energization of the coil 31 of the magnetic drive unit 27 is stopped.
　ブレーキレバー５９が連結軸３８に押圧されて回動されるときには、ブレーキレバー５９の押圧軸６２によって解除アーム７２の解除受け部７７ｂが押圧され解除アーム７２がロック解除バネ８１の付勢力に反してロック解除位置からロック保持位置へ向けて回動されていく。このとき保持レバー７１と解除アーム７２は同軸を支点として各別に回動可能にされているため、ブレーキレバー５９の押圧軸６２によって解除アーム７２の解除受け部７７ｂが押圧されたときには解除アーム７２がロック保持位置まで回動されるが、保持レバー７１は解除アーム７２に伴っては回動されない。ロック部材４３はロックバネ５５の付勢力によって被押圧板部５４が解除アーム７２の規制突部７７ｃに押し当てられる方向へ付勢されているため、ロックバネ５５の付勢力によって解除アーム７２に伴って回動される。 When the brake lever 59 is pressed by the connecting shaft 38 and rotated, the release receiving portion 77b of the release arm 72 is pressed by the pressing shaft 62 of the brake lever 59, and the release arm 72 is opposed to the urging force of the lock release spring 81. It is rotated from the unlocked position to the locked holding position. At this time, since the holding lever 71 and the release arm 72 are individually rotatable about the coaxial as a fulcrum, the release arm 72 is pressed when the release receiving portion 77b of the release arm 72 is pressed by the pressing shaft 62 of the brake lever 59. Although it is rotated to the lock holding position, the holding lever 71 is not rotated with the release arm 72. Since the lock member 43 is urged in the direction in which the pressed plate portion 54 is pressed against the regulation protrusion 77c of the release arm 72 by the urging force of the lock spring 55, the lock member 43 is rotated along with the release arm 72 by the urging force of the lock spring 55. Be moved.
　ブレーキレバー５９の押圧軸６２によって解除受け部７７ｂが押圧され解除アーム７２がロック解除バネ８１の付勢力に反してロック保持位置へ向けて回動されたときには、解除アーム７２が保持レバー７１から離隔されるため両端部がそれぞれ保持レバー７１と解除アーム７２に係合されている戻しバネ７６の付勢力が大きくなっていく。従って、解除アーム７２の回動に遅れて保持レバー７１が戻しバネ７６の付勢力によってロック保持位置へ向けて回動される（図２５参照）。 When the release receiving portion 77b is pressed by the pressing shaft 62 of the brake lever 59 and the release arm 72 is rotated toward the lock holding position against the urging force of the lock release spring 81, the release arm 72 is separated from the holding lever 71. Therefore, the urging force of the return spring 76 whose both ends are engaged with the holding lever 71 and the release arm 72 increases. Therefore, the holding lever 71 is rotated toward the lock holding position by the urging force of the return spring 76 after the rotation of the release arm 72 (see FIG. 25).
　このとき戻しバネ７６のバネ力がロック解除バネ８１のバネ力より小さくされており、ロック部材４３はブレーキレバー５９の押圧軸６２によって押圧されて回動される解除アーム７２の回動速度より低速でロック保持位置まで回動される。 At this time, the spring force of the return spring 76 is smaller than the spring force of the lock release spring 81, and the lock member 43 is slower than the rotation speed of the release arm 72 which is pressed and rotated by the pressing shaft 62 of the brake lever 59. Is rotated to the lock holding position.
　上記のように駆動体３４が第２の回動端に保持されたときには、駆動体３４の回動に伴って動作された開閉羽根１５が閉塞位置に至り開閉羽根１５の開放位置から閉塞位置までの動作が終了し、ベース体１３の開口１３ａが閉塞される。 When the drive body 34 is held at the second rotating end as described above, the opening / closing blade 15 operated by the rotation of the driving body 34 reaches the closing position and from the opening position to the closing position of the opening / closing blade 15. Is completed, and the opening 13a of the base body 13 is closed.
　このとき電磁石５６に対する通電が停止されて磁力発生部５７に磁力が発生している。従って、磁力発生部５７によって吸着片４５が引き寄せられ、吸着部５７ａ、５７ａによって吸着片４５が吸着され、ロック解除体４２Ａがロック保持位置まで回動されて初期状態に戻りロック部材４３がロック位置まで回動されて初期状態に戻る。 At this time, the energization of the electromagnet 56 is stopped and a magnetic force is generated in the magnetic force generating portion 57. Therefore, the suction piece 45 is attracted by the magnetic force generating unit 57, the suction piece 45 is attracted by the suction parts 57a and 57a, the unlocking body 42A is rotated to the lock holding position, and the lock member 43 returns to the initial state and the lock member 43 is in the lock position. It is rotated to return to the initial state.
　開閉羽根１５の開放位置から閉塞位置までの動作が終了すると、続いて、開閉羽根１５の閉塞位置から開放位置までの動作が開始される。開閉羽根１５の閉塞位置から開放位置までの動作が開始されるときには、撮像素子１２は電子幕によって光が入射されない閉塞状態（非露光状態）にされる。 When the operation from the open position to the closed position of the opening / closing blade 15 is completed, the operation from the closed position to the open position of the opening / closing blade 15 is subsequently started. When the operation of the opening / closing blade 15 from the closed position to the open position is started, the image sensor 12 is put into a closed state (non-exposure state) in which light is not incident by the electronic curtain.
　開閉羽根１５の閉塞位置から開放位置までの動作は磁気駆動部２７のコイル３１に対して先程とは反対方向への通電が行われることにより開始される（図２６参照）。 The operation of the opening / closing blade 15 from the closed position to the open position is started by energizing the coil 31 of the magnetic drive unit 27 in the opposite direction to the previous one (see FIG. 26).
　コイル３１に反対方向への通電が行われると、磁気駆動部２７において発生した駆動力がローターギヤ３３から駆動体３４に伝達されて駆動体３４が走行バネ４０の付勢力に反して第２の回動端から第１の回動端まで回動されて初期状態に戻り、磁気駆動部２７において発生した駆動力がローターギヤ３３から駆動体３４を介して開閉羽根１５に伝達されて開閉羽根１５が閉塞位置から開放位置まで動作される。 When the coil 31 is energized in the opposite direction, the driving force generated in the magnetic driving unit 27 is transmitted from the rotor gear 33 to the driving body 34, and the driving body 34 is subjected to the second force against the urging force of the traveling spring 40. It is rotated from the rotating end to the first rotating end to return to the initial state, and the driving force generated in the magnetic drive unit 27 is transmitted from the rotor gear 33 to the opening / closing blade 15 via the driving body 34, and the opening / closing blade 15 Is operated from the closed position to the open position.
　駆動体３４が第２の回動端から第１の回動端まで回動されるときには、駆動体３４の連結軸３８がブレーキアーム６０から離隔されるが、駆動体３４の戻し軸３９がブレーキアーム６０に連結軸３８の接触方向と反対方向から接触され、戻し軸３９によってブレーキレバー５９が回動停止位置から減速開始位置まで回動されて初期状態に戻る。ブレーキレバー５９は回動停止位置から減速開始位置へ向けて回動されることにより、押圧軸６２が解除アーム７２の解除受け部７７ｂから離隔される。 When the drive body 34 is rotated from the second rotation end to the first rotation end, the connecting shaft 38 of the drive body 34 is separated from the brake arm 60, but the return shaft 39 of the drive body 34 brakes. The arm 60 is contacted from the direction opposite to the contact direction of the connecting shaft 38, and the brake lever 59 is rotated from the rotation stop position to the deceleration start position by the return shaft 39 to return to the initial state. The brake lever 59 is rotated from the rotation stop position to the deceleration start position, so that the pressing shaft 62 is separated from the release receiving portion 77b of the release arm 72.
　駆動体３４が第２の回動端から第１の回動端まで回動されるときには、ロック部材４３が非ロック位置からロック位置まで回動されており、駆動レバー３６の摺動傾斜縁３６ｄがロック部材４３のロック部５３ｂに摺動され、一旦、ロック部材４３がロックバネ５５の付勢力に反して回動される。さらに駆動体３４が第１の回動端まで回動されると、摺動傾斜縁３６ｄがロック部５３ｂを乗り越え、ロックバネ５５の付勢力によってロック部材４３が回動されて被ロック部３６ｃがロック部５３ｂに係合され、駆動体３４は走行バネ４０の付勢力に反して回動が規制されロック状態にされ第１の回動端に保持されて初期状態に戻る。 When the drive body 34 is rotated from the second rotating end to the first rotating end, the lock member 43 is rotated from the unlocked position to the locked position, and the sliding inclined edge 36d of the drive lever 36d. Is slid on the lock portion 53b of the lock member 43, and the lock member 43 is once rotated against the urging force of the lock spring 55. Further, when the drive body 34 is rotated to the first rotation end, the sliding inclined edge 36d gets over the lock portion 53b, and the lock member 43 is rotated by the urging force of the lock spring 55 to lock the locked portion 36c. Engaged with the portion 53b, the drive body 34 is restricted from rotating against the urging force of the traveling spring 40, is locked, and is held at the first rotating end to return to the initial state.
　駆動体３４が第１の回動端に保持されて初期状態に戻ったときには、コイル３１に対する反対方向への通電が停止され、磁気駆動部２７に開閉羽根１５に対する駆動力が発生していない状態にされる。 When the drive body 34 is held by the first rotating end and returns to the initial state, the energization of the coil 31 in the opposite direction is stopped, and the magnetic drive unit 27 does not generate a driving force for the opening / closing blade 15. Be made.
　上記したように、ロック動作ユニット４１Ａが用いられた羽根開閉装置１１及び撮像装置１にあっては、ロック解除体４２Ａが電磁石５６に吸着される保持レバー７１とブレーキレバー５９によって押圧される解除アーム７２とを有し、保持レバー７１と解除アーム７２が各別に回動可能にされている。 As described above, in the blade opening / closing device 11 and the imaging device 1 in which the locking operation unit 41A is used, the unlocking body 42A is pressed by the holding lever 71 and the brake lever 59 that are attracted to the electromagnet 56. 72, and the holding lever 71 and the release arm 72 are individually rotatable.
　従って、保持レバー７１の回動速度をブレーキレバー５９によって押圧される解除アーム７２の回動速度と異なる速度にすることが可能になり、電磁石５６による吸着時における保持レバー７１の回動速度を解除アーム７２の回動速度より低速にすることにより電磁石５６によってロック解除体４２Ａが吸着されるときに電磁石５６に対して付与される衝撃を低減し電磁石５６の高い性能を維持することができる。 Therefore, the rotation speed of the holding lever 71 can be set to a speed different from the rotation speed of the release arm 72 pressed by the brake lever 59, and the rotation speed of the holding lever 71 at the time of attraction by the electromagnet 56 can be released. By making the rotation speed slower than the rotation speed of the arm 72, the impact applied to the electromagnet 56 when the unlocking body 42A is attracted by the electromagnet 56 can be reduced, and the high performance of the electromagnet 56 can be maintained.
　特に、電磁石５６は吸着部５７ａ、５７ａが硬度の低い材料によって形成されることも多く、ロック解除体４２Ａから電磁石５６に対して付与される衝撃を低減することにより、吸着部５７ａ、５７ａの摩耗を抑制し、電磁石５６の耐久性の向上による良好な特性を確保することができる。 In particular, in the electromagnet 56, the suction portions 57a and 57a are often formed of a material having low hardness, and by reducing the impact applied to the electromagnet 56 by the unlocking body 42A, the suction portions 57a and 57a are worn. It is possible to secure good characteristics by improving the durability of the electromagnet 56.
　また、ロック解除バネ８１によって解除アーム７２が付勢され、保持レバー７１を解除アーム７２に近付く方向へ付勢する戻しバネ７６が設けられ、戻しバネ７６の付勢力がロック解除バネ８１の付勢力より小さくされている。 Further, the release arm 72 is urged by the unlock spring 81, and a return spring 76 is provided to urge the holding lever 71 in a direction approaching the release arm 72, and the urging force of the return spring 76 is the urging force of the unlock spring 81. It has been made smaller.
　従って、ロック解除バネ８１の付勢力より小さい付勢力を有する戻しバネ７６によって保持レバー７１が解除アーム７２に近付く方向へ回動されるため、簡素な構成により電磁石５６による吸着時における保持レバー７１の回動速度を解除アーム７２の回動速度より低速にすることができ、電磁石５６におけるロック解除体４２Ａによる衝撃を簡素な構成によって確実に低減することができる。 Therefore, the holding lever 71 is rotated in the direction of approaching the releasing arm 72 by the return spring 76 having an urging force smaller than the urging force of the unlocking spring 81. The rotation speed can be made slower than the rotation speed of the release arm 72, and the impact of the unlocking body 42A on the electromagnet 56 can be reliably reduced by a simple configuration.
　＜リンクの構造＞
　以下に、リンク１６の構造について説明する（図２７乃至図２９参照）。尚、羽根開閉装置１１においては、外形状の異なる二つのリンク１６、１６が設けられているが、以下には、説明を簡単にするために一方のリンク１６についてのみ説明する。但し、二つのリンク１６の構造（層構成）は同じである。 <Link structure>
The structure of the link 16 will be described below (see FIGS. 27 to 29). The blade opening / closing device 11 is provided with two links 16 and 16 having different outer shapes, but only one of the links 16 will be described below for the sake of simplicity. However, the structure (layer structure) of the two links 16 is the same.
　上記したように、羽根開閉装置１１においては、開閉羽根１５のセクター１５ａがリンク１６を介して駆動体３４における駆動レバー３６に連結されている。 As described above, in the blade opening / closing device 11, the sector 15a of the opening / closing blade 15 is connected to the drive lever 36 in the drive body 34 via the link 16.
　リンク１６は、例えば、炭素繊維強化プラスチック（ＣＦＲＰ：Carbon Fiber Reinforced Plastics）によって形成され、複数のプリプレグ８５、８５、・・・が積層されて構成されている。従って、リンク１６は、樹脂によって形成される場合に比し、樹脂を炭素繊維で強化することにより高い強度や剛性が確保されている。 The link 16 is formed of, for example, carbon fiber reinforced plastic (CFRP: Carbon Fiber Reinforced Plastics), and is configured by laminating a plurality of prepregs 85, 85, .... Therefore, the link 16 is ensured to have high strength and rigidity by reinforcing the resin with carbon fibers as compared with the case where the link 16 is formed of the resin.
　炭素繊維としては、例えば、ポリアクリロニトリル又は石油や石炭から得られるピッチ系の炭素繊維が用いられている。樹脂（プラスチック）としては、例えば、熱硬化性のエポキシ樹脂が用いられている。 As the carbon fiber, for example, polyacrylonitrile or pitch-based carbon fiber obtained from petroleum or coal is used. As the resin (plastic), for example, a thermosetting epoxy resin is used.
　リンク１６は長手方向と短手方向を有する形状に形成され、奇数枚のプリプレグ８５、８５、・・・、例えば、３枚のプリプレグ８５が積層されて構成されている。 The link 16 is formed in a shape having a longitudinal direction and a lateral direction, and is configured by stacking an odd number of prepregs 85, 85, ..., For example, three prepregs 85.
　プリプレグ８５は炭素繊維に樹脂が含浸されたシート状の部材であり、炭素繊維が一方向に並んで形成されている。プリプレグ８５は炭素繊維の繊維方向が長手方向にされた長手繊維プリプレグ８６又は炭素繊維の繊維方向が短手方向にされた短手繊維プリプレグ８７として形成されている。尚、図２７乃至図２９には、繊維方向のイメージをストライプによって示している。 The prepreg 85 is a sheet-like member in which carbon fibers are impregnated with resin, and the carbon fibers are formed side by side in one direction. The prepreg 85 is formed as a longitudinal fiber prepreg 86 in which the fiber direction of the carbon fibers is in the longitudinal direction or a short fiber prepreg 87 in which the fiber direction of the carbon fibers is in the lateral direction. In addition, in FIGS. 27 to 29, the image in the fiber direction is shown by stripes.
　リンク１６は長手繊維プリプレグ８６と短手繊維プリプレグ８７が交互に積層されて構成され、長手繊維プリプレグ８６の数が短手繊維プリプレグ８７の数より多くされている。従って、リンク１６は厚み方向における外側に長手繊維プリプレグ８６、８６が位置され、長手繊維プリプレグ８６、８６の間に短手繊維プリプレグ８７が位置された層構成にされている。 The link 16 is configured by alternately laminating the longitudinal fiber prepreg 86 and the short fiber prepreg 87, and the number of the longitudinal fiber prepreg 86 is larger than the number of the short fiber prepreg 87. Therefore, the link 16 has a layer structure in which the longitudinal fiber prepregs 86, 86 are located on the outer side in the thickness direction, and the short fiber prepreg 87 is located between the longitudinal fiber prepregs 86, 86.
　尚、リンク１６は長手繊維プリプレグ８６と短手繊維プリプレグ８７が交互に積層され長手繊維プリプレグ８６の数が短手繊維プリプレグ８７の数より多くされていればプリプレグ８５の枚数が３枚に限られることはなく、プリプレグ８５が５枚以上の奇数枚にされていてもよい。例えば、５枚のプリプレグ８５が積層されたリンク１６においては、３枚の長手繊維プリプレグ８６と２枚の短手繊維プリプレグ８７とによって構成され長手繊維プリプレグ８６と短手繊維プリプレグ８７が交互に積層されている。また、７枚のプリプレグ８５が積層されたリンク１６においては、４枚の長手繊維プリプレグ８６と３枚の短手繊維プリプレグ８７とによって構成され長手繊維プリプレグ８６と短手繊維プリプレグ８７が交互に積層されている。 If the length fiber prepreg 86 and the short fiber prepreg 87 are alternately laminated and the number of the longitudinal fiber prepreg 86 is larger than the number of the short fiber prepreg 87, the number of the link 16 is limited to three. The number of prepregs 85 may be an odd number of 5 or more. For example, in the link 16 in which five prepregs 85 are laminated, it is composed of three longitudinal fiber prepregs 86 and two short fiber prepregs 87, and the longitudinal fiber prepregs 86 and the short fiber prepregs 87 are alternately laminated. Has been done. Further, in the link 16 in which seven prepregs 85 are laminated, four longitudinal fiber prepregs 86 and three short fiber prepregs 87 are formed, and the longitudinal fiber prepregs 86 and the short fiber prepregs 87 are alternately laminated. Has been done.
　このようにリンク１６は奇数枚のプリプレグ８５が積層された炭素繊維強化プラスチックによって形成され、繊維方向が長手方向にされた長手繊維プリプレグ８６と繊維方向が短手方向にされた短手繊維プリプレグ８７とが交互に積層され長手繊維プリプレグ８６の数が短手繊維プリプレグ８７の数より多くされている。 As described above, the link 16 is formed of carbon fiber reinforced plastic in which an odd number of prepregs 85 are laminated, and the longitudinal fiber prepreg 86 having the fiber direction in the longitudinal direction and the short fiber prepreg 87 having the fiber direction in the lateral direction are formed. And are alternately laminated, and the number of longitudinal fiber prepregs 86 is larger than the number of short fiber prepregs 87.
　従って、リンク１６の剛性が一層高くなり、リンク１６の耐久性の向上を図ることができると共にリンク１６に連結された開閉羽根１５の動作の円滑化及び安定化を図ることができる。 Therefore, the rigidity of the link 16 is further increased, the durability of the link 16 can be improved, and the operation of the opening / closing blade 15 connected to the link 16 can be smoothed and stabilized.
　＜撮像装置の一実施形態＞
　以下に、本技術撮像装置の一実施形態の構成例について説明する（図２９参照）。 <One Embodiment of the Imaging Device>
Hereinafter, a configuration example of an embodiment of the imaging device of the present technology will be described (see FIG. 29).
　撮像装置１は、撮像機能を担うカメラブロック９０と、撮影された画像信号のアナログ－デジタル変換等の信号処理を行うカメラ信号処理部９１と、画像信号の記録再生処理を行う画像処理部９２とを有している。また、撮像装置１は、撮影された画像等を表示する表示部９３（ディスプレイ７）と、メモリー１００への画像信号の書込及び読出を行うＲ／Ｗ（リーダ／ライタ）９４と、撮像装置１の全体を制御するＣＰＵ（Central Processing Unit）９５と、カメラブロック９０に配置されたレンズの駆動を制御するレンズ駆動制御部９６と、ユーザーによって所要の操作が行われる各種のスイッチ等の操作部９７（シャッター釦４、ズームスイッチ５、電源釦６、操作部８等）とを備えている。 The image pickup device 1 includes a camera block 90 that has an imaging function, a camera signal processing unit 91 that performs signal processing such as analog-to-digital conversion of the captured image signal, and an image processing unit 92 that performs recording / playback processing of the image signal. have. Further, the image pickup device 1 includes a display unit 93 (display 7) for displaying a captured image and the like, an R / W (reader / writer) 94 for writing and reading an image signal to the memory 100, and an image pickup device. A CPU (Central Processing Unit) 95 that controls the entire 1 unit, a lens drive control unit 96 that controls the drive of a lens arranged in a camera block 90, and an operation unit such as various switches in which a user performs a required operation. It is equipped with 97 (shutter button 4, zoom switch 5, power button 6, operation unit 8, etc.).
　カメラブロック９０は交換レンズ２００として設けられていてもよい。 The camera block 90 may be provided as an interchangeable lens 200.
　撮像装置１には、カメラブロック９０によって取り込まれた光学像を電気的信号に変換するＣＣＤ（Charge Coupled Device）やＣＭＯＳ（Complementary Metal-Oxide Semiconductor）等の撮像素子１２が設けられている。 The image pickup device 1 is provided with an image pickup device 12 such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) that converts an optical image captured by the camera block 90 into an electrical signal.
　カメラ信号処理部９１は、撮像素子１２からの出力信号に対するデジタル信号への変換、ノイズ除去、画質補正、輝度・色差信号への変換等の各種の信号処理を行う。 The camera signal processing unit 91 performs various signal processing such as conversion of the output signal from the image pickup element 12 into a digital signal, noise removal, image quality correction, and conversion into a luminance / color difference signal.
　画像処理部９２は、所定の画像データフォーマットに基づく画像信号の圧縮符号化・伸張復号化処理や解像度等のデータ仕様の変換処理等を行う。 The image processing unit 92 performs compression coding / decompression decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like.
　表示部９３はユーザーの操作部９７に対する操作状態や撮影した画像等の各種のデータを表示する機能を有している。尚、撮像装置１においては、表示部９３が設けられていなくてもよく、撮影された画像データが他の表示装置に送出されて画像が表示されるように構成されていてもよい。 The display unit 93 has a function of displaying various data such as an operation state of the user's operation unit 97 and a captured image. The image pickup device 1 may not be provided with the display unit 93, and may be configured so that the captured image data is sent to another display device to display the image.
　Ｒ／Ｗ９４は、画像処理部９２によって符号化された画像データのメモリー１００への書込及びメモリー１００に記録された画像データの読出を行う。 The R / W 94 writes the image data encoded by the image processing unit 92 to the memory 100 and reads the image data recorded in the memory 100.
　ＣＰＵ９５は、撮像装置１に設けられた各回路ブロックを制御する制御処理部として機能し、操作部９７からの指示入力信号等に基づいて各回路ブロックを制御する。 The CPU 95 functions as a control processing unit that controls each circuit block provided in the image pickup apparatus 1, and controls each circuit block based on an instruction input signal or the like from the operation unit 97.
　レンズ駆動制御部９６は、ＣＰＵ９５からの制御信号に基づいてレンズを移動させる駆動源を制御する。 The lens drive control unit 96 controls a drive source for moving the lens based on a control signal from the CPU 95.
　操作部９７はユーザーによる操作に応じた指示入力信号をＣＰＵ９５に対して出力する。 The operation unit 97 outputs an instruction input signal corresponding to the operation by the user to the CPU 95.
　メモリー１００は、例えば、Ｒ／Ｗ９４に接続されたスロットに対して着脱可能な半導体メモリー又は撮像装置１の内部に予め組み込まれている半導体メモリーである。 The memory 100 is, for example, a semiconductor memory that can be attached to and detached from a slot connected to the R / W 94, or a semiconductor memory that is preliminarily incorporated inside the image pickup apparatus 1.
　以下に、撮像装置１における動作を説明する。 The operation of the image pickup apparatus 1 will be described below.
　撮影の待機状態では、ＣＰＵ９５による制御の下で、撮影された画像信号がカメラ信号処理部９１を介して表示部９３に出力され、カメラスルー画像として表示される。また、操作部９７からの指示入力信号が入力されると、ＣＰＵ９５がレンズ駆動制御部９６に制御信号を出力し、レンズ駆動制御部９６の制御に基づいてレンズが移動される。 In the shooting standby state, under the control of the CPU 95, the shot image signal is output to the display unit 93 via the camera signal processing unit 91 and displayed as a camera-through image. When the instruction input signal from the operation unit 97 is input, the CPU 95 outputs a control signal to the lens drive control unit 96, and the lens is moved based on the control of the lens drive control unit 96.
　操作部９７からの指示入力信号により撮影動作が行われると、撮影された画像信号がカメラ信号処理部９１から画像処理部９２に出力されて圧縮符号化処理され、所定のデータフォーマットのデジタルデータに変換される。変換されたデータはＲ／Ｗ９４に出力され、メモリー１００に書き込まれる。 When the shooting operation is performed by the instruction input signal from the operation unit 97, the shot image signal is output from the camera signal processing unit 91 to the image processing unit 92, compressed and encoded, and converted into digital data in a predetermined data format. Will be converted. The converted data is output to R / W 94 and written to the memory 100.
　メモリー１００に記録された画像データを再生する場合には、操作部９７に対する操作に応じて、Ｒ／Ｗ９４によってメモリー１００から所定の画像データが読み出され、画像処理部９２によって伸張復号化処理が行われた後に、再生画像信号が表示部９３に出力されて再生画像が表示される。 When the image data recorded in the memory 100 is reproduced, the R / W 94 reads the predetermined image data from the memory 100 in response to the operation on the operation unit 97, and the image processing unit 92 performs the decompression / decoding process. After that, the reproduced image signal is output to the display unit 93 and the reproduced image is displayed.
　尚、本技術において、「撮像」とは、撮像素子１２による取り込まれた光を電気信号に変換する光電変換処理から、カメラ信号処理部９１による撮像素子１２からの出力信号に対するデジタル信号への変換、ノイズ除去、画質補正、輝度・色差信号への変換等の処理、画像処理部９２による所定の画像データフォーマットに基づく画像信号の圧縮符号化・伸張復号化処理や解像度等のデータ仕様の変換処理、Ｒ／Ｗ９４によるメモリー１００への画像信号の書込処理までの一連の処理の一部のみ、または全てを含む処理のことを言う。 In the present technology, "imaging" means conversion from photoelectric conversion processing for converting light captured by the imaging element 12 into an electric signal to digital signal for the output signal from the imaging element 12 by the camera signal processing unit 91. , Noise removal, image quality correction, conversion to brightness / color difference signals, etc., compression coding / decompression decoding processing of image signals based on a predetermined image data format by the image processing unit 92, conversion processing of data specifications such as resolution, etc. , Refers to a process including only a part or all of a series of processes up to the process of writing an image signal to the memory 100 by the R / W 94.
　即ち、「撮像」とは、撮像素子１２による取り込まれた光を電気信号に変換する光電変換処理のみを指してもよく、撮像素子１２による取り込まれた光を電気信号に変換する光電変換処理からカメラ信号処理部９１による撮像素子１２からの出力信号に対するデジタル信号への変換、ノイズ除去、画質補正、輝度・色差信号への変換等の処理までを指してもよく、撮像素子１２による取り込まれた光を電気信号に変換する光電変換処理からカメラ信号処理部９１による撮像素子１２からの出力信号に対するデジタル信号への変換、ノイズ除去、画質補正、輝度・色差信号への変換等の処理を経て、画像処理部９２による所定の画像データフォーマットに基づく画像信号の圧縮符号化・伸張復号化処理や解像度等のデータ仕様の変換処理までを指してもよく、撮像素子１２による取り込まれた光を電気信号に変換する光電変換処理からカメラ信号処理部９１による撮像素子１２からの出力信号に対するデジタル信号への変換、ノイズ除去、画質補正、輝度・色差信号への変換等の処理、及び画像処理部９２による所定の画像データフォーマットに基づく画像信号の圧縮符号化・伸張復号化処理や解像度等のデータ仕様の変換処理までを指してもよく、Ｒ／Ｗ９４によるメモリー１００への画像信号の書込処理までを指してもよい。上記の処理において各処理の順番は適宜入れ替わってもよい。 That is, "imaging" may refer only to the photoelectric conversion process for converting the light captured by the imaging element 12 into an electric signal, and from the photoelectric conversion process for converting the light captured by the imaging element 12 into an electric signal. It may also refer to processing such as conversion of the output signal from the image pickup element 12 by the camera signal processing unit 91 into a digital signal, noise removal, image quality correction, and conversion into a brightness / color difference signal, and is captured by the image pickup element 12. After the photoelectric conversion process for converting light into an electric signal, the camera signal processing unit 91 converts the output signal from the image pickup element 12 into a digital signal, noise removal, image quality correction, conversion into a brightness / color difference signal, and the like. It may also refer to compression coding / decompression decoding processing of an image signal based on a predetermined image data format by the image processing unit 92 and conversion processing of data specifications such as resolution, and the light captured by the image pickup element 12 is an electric signal. The photoelectric conversion process for converting to a digital signal by the camera signal processing unit 91 to a digital signal for the output signal from the image pickup element 12, noise removal, image quality correction, conversion to a brightness / color difference signal, and the like, and the image processing unit 92. It may refer to compression coding / decompression decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and writing processing of an image signal to the memory 100 by R / W94. You may point. In the above processing, the order of each processing may be changed as appropriate.
　また、本技術において、カメラブロック９０及び撮像装置１は、上記の処理を行う撮像素子１２、カメラ信号処理部９１、画像処理部９２、Ｒ／Ｗ９４の一部のみまたは全てを含むように構成されていてもよい。 Further, in the present technology, the camera block 90 and the image pickup device 1 are configured to include only a part or all of the image pickup element 12, the camera signal processing section 91, the image processing section 92, and the R / W 94 that perform the above processing. You may be.
　また、カメラブロック９０が撮像素子１２、カメラ信号処理部９１、画像処理部９２、Ｒ／Ｗ９４のうち一部を含み、装置本体２００が残りを含むように構成されていてもよい。 Further, the camera block 90 may be configured to include a part of the image sensor 12, the camera signal processing unit 91, the image processing unit 92, and the R / W 94, and the apparatus main body 200 may include the rest.
　＜本技術＞
　本技術は、以下のような構成にすることもできる。 <This technology>
The present technology can also be configured as follows.
　（１）
　開口を開閉する開閉方向へ動作される開閉羽根と、
　駆動電流が供給されるコイルと前記コイルへの通電に伴って回転されるマグネットと前記マグネットの回転に伴って回転されるローターギヤとを有する磁気駆動部と、
　前記ローターギヤに噛合される駆動ギヤを有し前記マグネットと反対方向へ同期して回動される駆動体と、
　前記駆動体を介して前記開閉羽根に前記開閉方向における一方への付勢力を付与する走行バネとを備え、
　前記開閉羽根が前記駆動体の回動動作に伴って前記開閉方向へ動作される
　羽根開閉装置。 (1)
Opening and closing blades that operate in the opening and closing direction to open and close the opening,
A magnetic drive unit having a coil to which a drive current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet.
A drive body having a drive gear meshed with the rotor gear and rotating synchronously in the direction opposite to the magnet.
The opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction via the driving body.
A blade opening / closing device in which the opening / closing blade is operated in the opening / closing direction as the drive body rotates.
　（２）
　前記駆動体又は前記磁気駆動部の少なくとも一方の駆動力によって前記開閉羽根が動作される
　前記（１）に記載の羽根開閉装置。 (2)
The blade opening / closing device according to (1), wherein the opening / closing blade is operated by the driving force of at least one of the driving body or the magnetic driving unit.
　（３）
　前記磁気駆動部と前記駆動体が前記開閉羽根の開閉方向と同じ方向において並んで配置された
　前記（１）又は前記（２）に記載の羽根開閉装置。 (3)
The blade opening / closing device according to (1) or (2), wherein the magnetic driving unit and the driving body are arranged side by side in the same direction as the opening / closing direction of the opening / closing blade.
　（４）
　前記駆動体に回動支点部として機能する被支持軸部が設けられ、
　前記走行バネとして捩じりコイルバネが用いられ、
　前記走行バネが前記被支持軸部に支持された
　前記（１）から前記（３）の何れかに記載の羽根開閉装置。 (4)
The drive body is provided with a supported shaft portion that functions as a rotation fulcrum portion.
A torsion coil spring is used as the traveling spring.
The blade opening / closing device according to any one of (1) to (3) above, wherein the traveling spring is supported by the supported shaft portion.
　（５）
　ロック部を有しロック位置と非ロック位置の間で動作されるロック部材が設けられ、
　前記駆動体に被ロック部が形成され、
　前記ロック位置において前記走行バネの付勢力により前記被ロック部が前記ロック部に押し付けられることにより前記駆動体が前記ロック部材にロックされる
　前記（１）から前記（４）の何れかに記載の羽根開閉装置。 (5)
A locking member having a locking portion and operating between a locked position and a non-locking position is provided.
A locked portion is formed on the driving body, and a locked portion is formed.
The drive body is locked to the lock member by pressing the locked portion against the lock portion by the urging force of the traveling spring at the lock position according to any one of (1) to (4). Blade opening and closing device.
　（６）
　ロック保持位置とロック解除位置の間で動作され前記ロック部材を前記ロック位置と前記非ロック位置の間で動作させるロック解除体と、
　吸着することにより前記ロック解除体を前記ロック保持位置に保持する電磁石と、
　前記ロック解除体を前記ロック解除位置へ向けて付勢するロック解除バネとが設けられた
　前記（５）に記載の羽根開閉装置。 (6)
An unlocking body that operates between the lock holding position and the unlocking position and operates the locking member between the locking position and the unlocking position.
An electromagnet that holds the unlocked body in the lock holding position by adsorption, and
The blade opening / closing device according to (5), wherein an unlocking spring for urging the unlocked body toward the unlocked position is provided.
　（７）
　前記駆動体の所定の回動範囲において前記駆動体の回動速度を回動端に近付くに従って低減するブレーキレバーが設けられた
　前記（６）に記載の羽根開閉装置。 (7)
The blade opening / closing device according to (6) above, wherein a brake lever is provided to reduce the rotation speed of the drive body as it approaches the rotation end in a predetermined rotation range of the drive body.
　（８）
　前記ブレーキレバーが回動可能にされ、
　前記ブレーキレバーには前記駆動体によって押圧されるブレーキアームと前記ロック解除体を押圧する作用アームとが設けられ、
　前記駆動体による前記ブレーキアームの押圧時に前記作用アームによって前記ロック解除体が押圧されることにより前記ロック解除体が前記ロック解除位置から前記ロック保持位置へ向けて動作される共に前記ロック部材が前記非ロック位置から前記ロック位置へ向けて動作される
　前記（７）に記載の羽根開閉装置。 (8)
The brake lever is made rotatable
The brake lever is provided with a brake arm pressed by the driving body and an action arm pressing the unlocking body.
When the brake arm is pressed by the driving body, the unlocking body is pressed by the acting arm, so that the unlocking body is operated from the unlocking position to the lock holding position, and the locking member is operated. The blade opening / closing device according to (7), which is operated from an unlocked position to the locked position.
　（９）
　前記ロック解除体が前記電磁石に吸着される保持レバーと前記ブレーキレバーによって押圧される解除アームとを有し、
　前記保持レバーと前記解除アームが各別に回動可能にされた
　前記（８）に記載の羽根開閉装置。 (9)
The unlocking body has a holding lever that is attracted to the electromagnet and an unlocking arm that is pressed by the brake lever.
The blade opening / closing device according to (8), wherein the holding lever and the release arm are individually rotatable.
　（１０）
　前記ロック解除バネによって前記解除アームが付勢され、
　前記保持レバーを前記解除アームに近付く方向へ付勢する戻しバネが設けられ、
　前記戻しバネの付勢力が前記ロック解除バネの付勢力より小さくされた
　前記（９）に記載の羽根開閉装置。 (10)
The release arm is urged by the unlock spring, and the release arm is urged.
A return spring is provided to urge the holding lever in a direction approaching the release arm.
The blade opening / closing device according to (9), wherein the urging force of the return spring is smaller than the urging force of the unlocking spring.
　（１１）
　前記開閉羽根がリンクを介して前記駆動体に連結され、
　前記リンクは長手方向と短手方向を有する形状に形成されると共に奇数枚のプリプレグが積層された炭素繊維強化プラスチックによって形成され、
　前記プリプレグの繊維方向が長手方向又は短手方向にされると共に繊維方向が長手方向にされた前記プリプレグが長手繊維プリプレグとして形成され繊維方向が短手方向にされた前記プリプレグが短手繊維プリプレグとして形成され、
　前記長手繊維プリプレグと前記短手繊維プリプレグが交互に積層され前記長手繊維プリプレグの数が前記短手繊維プリプレグの数より多くされた
　前記（１）から前記（１０）の何れかに記載の羽根開閉装置。 (11)
The opening / closing blade is connected to the driving body via a link, and the opening / closing blade is connected to the driving body.
The link is formed of a carbon fiber reinforced plastic in which an odd number of prepregs are laminated while being formed in a shape having a longitudinal direction and a lateral direction.
The prepreg in which the fiber direction of the prepreg is in the longitudinal direction or the lateral direction and the fiber direction is in the longitudinal direction is formed as a longitudinal fiber prepreg, and the prepreg in which the fiber direction is in the lateral direction is used as a short fiber prepreg. Formed,
The blade opening / closing according to any one of (1) to (10) above, wherein the longitudinal fiber prepreg and the short fiber prepreg are alternately laminated and the number of the longitudinal fiber prepreg is larger than the number of the short fiber prepreg. apparatus.
　（１２）
　光学系を介して取り込まれる光の制御を行う羽根開閉装置と前記光学系を介して取り込まれる光を光電変換する撮像素子とを備え、
　前記羽根開閉装置は、
　開口を開閉する開閉方向へ動作される開閉羽根と、
　駆動電流が供給されるコイルと前記コイルへの通電に伴って回転されるマグネットと前記マグネットの回転に伴って回転されるローターギヤとを有する磁気駆動部と、
　前記ローターギヤに噛合される駆動ギヤを有し前記マグネットと反対方向へ同期して回動される駆動体と、
　前記駆動体を介して前記開閉羽根に前記開閉方向における一方への付勢力を付与する走行バネとを備え、
　前記開閉羽根が前記駆動体の回動動作に伴って前記開閉方向へ動作される
　撮像装置。 (12)
It is provided with a blade switchgear that controls the light taken in through the optical system and an image sensor that photoelectrically converts the light taken in through the optical system.
The blade opening / closing device is
Opening and closing blades that operate in the opening and closing direction to open and close the opening,
A magnetic drive unit having a coil to which a drive current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet.
A drive body having a drive gear meshed with the rotor gear and rotating synchronously in the direction opposite to the magnet.
The opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction via the driving body.
An imaging device in which the opening / closing blades are operated in the opening / closing direction as the drive body rotates.
１　　　撮像装置
１０　　光学系
１１　　羽根開閉装置
１２　　撮像素子
１３ａ　開口
１５　　開閉羽根
１６　　リンク
２７　　磁気駆動部
３１　　コイル
３２　　マグネット
３３　ローターギヤ
３４　　駆動体
３５　　駆動ギヤ
３６ｃ　被ロック部
３７　　被支持軸部
４０　　走行バネ
４２　　ロック解除体
４３　　ロック部材
５１　　ロック解除バネ
５３ｂ　ロック部
５６　　電磁石
５９　　ブレーキレバー
６０　　ブレーキアーム
６１　　作用アーム
４２Ａ　ロック解除体
４３　　ロック部材
７１　　保持レバー
７２　　解除アーム
７６　　戻しバネ
８１　　ロック解除バネ
８５　　プリプレグ
８６　　長手繊維プリプレグ
８７　　短手繊維プリプレグ 1 Imaging device 10 Optical system 11 Blade opening / closing device 12 Imaging element 13a Opening 15 Opening / closing blade 16 Link 27 Magnetic drive unit 31 Coil 32 Magnet 33 Rotor gear 34 Drive body 35 Drive gear 36c Locked part 37 Supported shaft part 40 Traveling spring 42 Unlocking body 43 Locking member 51 Unlocking spring 53b Locking part 56 Electromagnet 59 Brake lever 60 Brake arm 61 Acting arm 42A Unlocking body 43 Locking member 71 Holding lever 72 Unlocking arm 76 Return spring 81 Unlocking spring 85 Prepreg 86 Longitudinal fiber prepreg 87 Short fiber prepreg

Claims (12)

  1. 　開口を開閉する開閉方向へ動作される開閉羽根と、
    　駆動電流が供給されるコイルと前記コイルへの通電に伴って回転されるマグネットと前記マグネットの回転に伴って回転されるローターギヤとを有する磁気駆動部と、
    　前記ローターギヤに噛合される駆動ギヤを有し前記マグネットと反対方向へ同期して回動される駆動体と、
    　前記駆動体を介して前記開閉羽根に前記開閉方向における一方への付勢力を付与する走行バネとを備え、
    　前記開閉羽根が前記駆動体の回動動作に伴って前記開閉方向へ動作される
    　羽根開閉装置。     Opening and closing blades that operate in the opening and closing direction to open and close the opening,
    A magnetic drive unit having a coil to which a drive current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet.
    A drive body having a drive gear meshed with the rotor gear and rotating synchronously in the direction opposite to the magnet.
    The opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction via the driving body.
    A blade opening / closing device in which the opening / closing blade is operated in the opening / closing direction as the drive body rotates.
  2. 　前記駆動体又は前記磁気駆動部の少なくとも一方の駆動力によって前記開閉羽根が動作される
    　請求項１に記載の羽根開閉装置。     The blade opening / closing device according to claim 1, wherein the opening / closing blade is operated by the driving force of at least one of the driving body or the magnetic driving unit.
  3. 　前記磁気駆動部と前記駆動体が前記開閉羽根の開閉方向と同じ方向において並んで配置された
    　請求項１に記載の羽根開閉装置。     The blade opening / closing device according to claim 1, wherein the magnetic driving unit and the driving body are arranged side by side in the same direction as the opening / closing direction of the opening / closing blade.
  4. 　前記駆動体に回動支点部として機能する被支持軸部が設けられ、
    　前記走行バネとして捩じりコイルバネが用いられ、
    　前記走行バネが前記被支持軸部に支持された
    　請求項１に記載の羽根開閉装置。     The drive body is provided with a supported shaft portion that functions as a rotation fulcrum portion.
    A torsion coil spring is used as the traveling spring.
    The blade opening / closing device according to claim 1, wherein the traveling spring is supported by the supported shaft portion.
  5. 　ロック部を有しロック位置と非ロック位置の間で動作されるロック部材が設けられ、
    　前記駆動体に被ロック部が形成され、
    　前記ロック位置において前記走行バネの付勢力により前記被ロック部が前記ロック部に押し付けられることにより前記駆動体が前記ロック部材にロックされる
    　請求項１に記載の羽根開閉装置。     A locking member having a locking portion and operating between a locked position and a non-locking position is provided.
    A locked portion is formed on the driving body, and a locked portion is formed.
    The blade opening / closing device according to claim 1, wherein the drive body is locked to the lock member by pressing the locked portion against the lock portion by the urging force of the traveling spring at the lock position.
  6. 　ロック保持位置とロック解除位置の間で動作され前記ロック部材を前記ロック位置と前記非ロック位置の間で動作させるロック解除体と、
    　吸着することにより前記ロック解除体を前記ロック保持位置に保持する電磁石と、
    　前記ロック解除体を前記ロック解除位置へ向けて付勢するロック解除バネとが設けられた
    　請求項５に記載の羽根開閉装置。     An unlocking body that operates between the lock holding position and the unlocking position and operates the locking member between the locking position and the unlocking position.
    An electromagnet that holds the unlocked body in the lock holding position by adsorption, and
    The blade opening / closing device according to claim 5, further provided with an unlocking spring that urges the unlocking body toward the unlocking position.
  7. 　前記駆動体の所定の回動範囲において前記駆動体の回動速度を回動端に近付くに従って低減するブレーキレバーが設けられた
    　請求項６に記載の羽根開閉装置。     The blade opening / closing device according to claim 6, wherein a brake lever is provided to reduce the rotation speed of the drive body as it approaches the rotation end in a predetermined rotation range of the drive body.
  8. 　前記ブレーキレバーが回動可能にされ、
    　前記ブレーキレバーには前記駆動体によって押圧されるブレーキアームと前記ロック解除体を押圧する作用アームとが設けられ、
    　前記駆動体による前記ブレーキアームの押圧時に前記作用アームによって前記ロック解除体が押圧されることにより前記ロック解除体が前記ロック解除位置から前記ロック保持位置へ向けて動作される共に前記ロック部材が前記非ロック位置から前記ロック位置へ向けて動作される
    　請求項７に記載の羽根開閉装置。     The brake lever is made rotatable
    The brake lever is provided with a brake arm pressed by the driving body and an action arm pressing the unlocking body.
    When the brake arm is pressed by the driving body, the unlocking body is pressed by the acting arm, so that the unlocking body is operated from the unlocking position to the lock holding position, and the locking member is the lock member. The blade opening / closing device according to claim 7, which is operated from an unlocked position to the locked position.
  9. 　前記ロック解除体が前記電磁石に吸着される保持レバーと前記ブレーキレバーによって押圧される解除アームとを有し、
    　前記保持レバーと前記解除アームが各別に回動可能にされた
    　請求項８に記載の羽根開閉装置。     The unlocking body has a holding lever that is attracted to the electromagnet and an unlocking arm that is pressed by the brake lever.
    The blade opening / closing device according to claim 8, wherein the holding lever and the release arm are individually rotatable.
  10. 　前記ロック解除バネによって前記解除アームが付勢され、
    　前記保持レバーを前記解除アームに近付く方向へ付勢する戻しバネが設けられ、
    　前記戻しバネの付勢力が前記ロック解除バネの付勢力より小さくされた
    　請求項９に記載の羽根開閉装置。     The release arm is urged by the unlock spring, and the release arm is urged.
    A return spring is provided to urge the holding lever in a direction approaching the release arm.
    The blade opening / closing device according to claim 9, wherein the urging force of the return spring is smaller than the urging force of the unlocking spring.
  11. 　前記開閉羽根がリンクを介して前記駆動体に連結され、
    　前記リンクは長手方向と短手方向を有する形状に形成されると共に奇数枚のプリプレグが積層された炭素繊維強化プラスチックによって形成され、
    　前記プリプレグの繊維方向が長手方向又は短手方向にされると共に繊維方向が長手方向にされた前記プリプレグが長手繊維プリプレグとして形成され繊維方向が短手方向にされた前記プリプレグが短手繊維プリプレグとして形成され、
    　前記長手繊維プリプレグと前記短手繊維プリプレグが交互に積層され前記長手繊維プリプレグの数が前記短手繊維プリプレグの数より多くされた
    　請求項１に記載の羽根開閉装置。     The opening / closing blade is connected to the driving body via a link, and the opening / closing blade is connected to the driving body.
    The link is formed of a carbon fiber reinforced plastic in which an odd number of prepregs are laminated while being formed in a shape having a longitudinal direction and a lateral direction.
    The prepreg in which the fiber direction of the prepreg is in the longitudinal direction or the lateral direction and the fiber direction is in the longitudinal direction is formed as a longitudinal fiber prepreg, and the prepreg in which the fiber direction is in the lateral direction is used as a short fiber prepreg. Formed,
    The blade opening / closing device according to claim 1, wherein the longitudinal fiber prepreg and the short fiber prepreg are alternately laminated and the number of the longitudinal fiber prepreg is larger than the number of the short fiber prepreg.
  12. 　光学系を介して取り込まれる光の制御を行う羽根開閉装置と前記光学系を介して取り込まれる光を光電変換する撮像素子とを備え、
    　前記羽根開閉装置は、
    　開口を開閉する開閉方向へ動作される開閉羽根と、
    　駆動電流が供給されるコイルと前記コイルへの通電に伴って回転されるマグネットと前記マグネットの回転に伴って回転されるローターギヤとを有する磁気駆動部と、
    　前記ローターギヤに噛合される駆動ギヤを有し前記マグネットと反対方向へ同期して回動される駆動体と、
    　前記駆動体を介して前記開閉羽根に前記開閉方向における一方への付勢力を付与する走行バネとを備え、
    　前記開閉羽根が前記駆動体の回動動作に伴って前記開閉方向へ動作される
    　撮像装置。     It is provided with a blade switchgear that controls the light taken in through the optical system and an image sensor that photoelectrically converts the light taken in through the optical system.
    The blade opening / closing device is
    Opening and closing blades that operate in the opening and closing direction to open and close the opening,
    A magnetic drive unit having a coil to which a drive current is supplied, a magnet that is rotated by energizing the coil, and a rotor gear that is rotated by the rotation of the magnet.
    A drive body having a drive gear meshed with the rotor gear and rotating synchronously in the direction opposite to the magnet.
    The opening / closing blade is provided with a traveling spring that applies an urging force to one side in the opening / closing direction via the driving body.
    An imaging device in which the opening / closing blades are operated in the opening / closing direction as the drive body rotates.
PCT/JP2020/028472 2019-10-02 2020-07-22 Blade opening/closing device and imaging device WO2021065166A1 (en)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS6488525A (en) * 1987-09-30 1989-04-03 Canon Denshi Kk Arm for shutter of camera
JP2007121895A (en) * 2005-10-31 2007-05-17 Nikon Corp Shutter blade, shutter device, and manufacturing method of shutter blade
JP2015092236A (en) * 2013-10-02 2015-05-14 パナソニックＩｐマネジメント株式会社 Shutter device
WO2017104265A1 (en) * 2015-12-15 2017-06-22 ソニー株式会社 Shutter and imaging device
JP2017129820A (en) * 2016-01-22 2017-07-27 日本電産コパル株式会社 Blade driving device, focal plane shutter and imaging device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6488525A (en) * 1987-09-30 1989-04-03 Canon Denshi Kk Arm for shutter of camera
JP2007121895A (en) * 2005-10-31 2007-05-17 Nikon Corp Shutter blade, shutter device, and manufacturing method of shutter blade
JP2015092236A (en) * 2013-10-02 2015-05-14 パナソニックＩｐマネジメント株式会社 Shutter device
WO2017104265A1 (en) * 2015-12-15 2017-06-22 ソニー株式会社 Shutter and imaging device
JP2017129820A (en) * 2016-01-22 2017-07-27 日本電産コパル株式会社 Blade driving device, focal plane shutter and imaging device

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