JP2017003839A - Blade driving device, light intensity adjustment device, and imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade driving device that can perform both a high-speed operation and a silent operation of blades, a light intensity adjustment device, and an imaging device.SOLUTION: A blade driving device comprises: an opening forming member that forms an opening through which light passes; a rotating member that rotates around the opening; and a plurality of blades that are arranged between the opening forming member and rotating member. The blades are provided with first engaging parts engaged with the rotating member and second engaging parts engaged with guide parts included in the opening forming member, respectively; each of the blades can travel along the guide parts of the opening forming member accompanying the rotation of the rotating member while the second engaging part is engaged with the guide member of the opening forming member and the first engaging member is engaged with the rotating member; the opening forming member is provided, on a surface on which the blades travel, with a rubbing part on which one faces of the blades rub and a non-rubbing part on which one faces of the blades do not rub.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blade driving device that drives a blade toward a light passage path through which light passes, a light amount adjusting device including the blade driving device, and an imaging device such as a camera including the blade driving device or the light amount adjusting device. About.

  2. Description of the Related Art Conventionally, a rotation drive device that is mounted on an optical device such as a camera or an interchangeable lens and rotates an aperture blade to adjust the amount of light is known (see Patent Document 1).

  In the rotation drive device of Patent Document 1, dowels provided on one surface of a plurality of aperture blades are engaged with aperture cams on a cam plate, and further dowels provided on the other surface of each aperture blade are engaged with a rotating ring. And rotate the rotating ring to run the diaphragm blades.

Japanese Patent Laid-Open No. 10-20359

  In the blade driving device as in Patent Document 1, since the plurality of blades are substantially sandwiched between the rotating ring and the cam plate, the sliding friction of each diaphragm blade is large, and the high-speed operation of the diaphragm blades and It is disadvantageous for silent operation. Such a problem is not limited to the diaphragm blades described above, and may occur in other blade traveling structures as well.

  The present invention provides a blade driving device, a light amount adjusting device, and an imaging device capable of achieving both high-speed operation and silent operation of the blade.

The blade driving device of the present invention is disposed between an opening forming member that forms an opening through which light passes, a rotating member that rotates around the opening, and the opening forming member and the rotating member. A plurality of blades, and each of the blades includes a first engagement portion that engages with the rotating member and a second engagement portion that engages with a guide portion of the opening forming member. And each of the blades has the rotating member in a state in which the second engaging portion is engaged with the guide portion of the opening forming member and the first engaging portion is engaged with the rotating member. Is capable of traveling along the guide portion of the opening forming member, and on the surface side of the opening forming member on which the blades travel, there is a sliding portion on which one surface of the blade slides. A non-sliding portion where one surface of the blade does not slide is provided.
According to this aspect of the present invention, the sliding portion on which the blade slides is partially provided on the opening forming member, so that the sliding friction of the blade is substantially reduced, and the rotation member and the opening forming member A plurality of blades can be moved at high speed and quietly.

Moreover, in the said invention, the said sliding part is the opening peripheral part provided in the periphery of the said opening part, the guide peripheral part provided in the peripheral part of the said guide part, the said opening peripheral part, and the said guide peripheral part And a base receiving portion that receives the tip end side of the blade, and a base that receives the base end portion on the side opposite to the tip end of the blade by partially connecting the opening peripheral edge portion and the guide peripheral edge portion. It may be characterized by having an end receiving portion.
According to this aspect of the present invention, the tip and the base end of the blade are received by the opening peripheral edge, the guide peripheral edge, the tip receiving portion, and the base receiving portion, respectively, so that the blade can stably travel. Become.

In the present invention, at least a part of the base end receiving portion of the sliding portion may include a portion that always receives one surface of the blade during the travel of the blade.
According to this aspect of the present invention, since the sliding portion always receives a part of the blade during the traveling process of the blade, the blade can stably travel.

In the present invention described above, in a state where each of the blades is retracted to the outside of the opening, one blade substantially overlaps the three adjacent guide peripheral portions.
In such an aspect of the present invention, the retreat operation of each blade toward the outside of the opening can be stably performed.

Further, in the present invention, the sliding portion may be configured by a continuous same surface or an uneven surface in a direction orthogonal to the optical axis direction of the opening.
In this aspect of the present invention, the stable running of each blade can be realized while keeping the frictional resistance of each blade low.

In the present invention, the sliding part may be provided in the same pattern shape along the periphery of the opening.
In this aspect of the present invention, the sliding resistance of each blade is set to the same condition, and the frictional resistance of each blade is suppressed to a low level, thereby realizing stable traveling of each blade.

In the present invention, the non-sliding part may be a groove part formed on one side of the opening forming member or a through part penetrating the opening forming member in the thickness direction. .
In such an aspect of the present invention, if the non-sliding part is constituted by a groove part, the rigidity of the opening forming member can be easily secured, and the diffusion of wear powder can be prevented, and if the non-sliding part is constituted by a through part, the entire apparatus (opening formation) This is advantageous for reducing the weight and cost of the member.

Further, in the present invention, the outer peripheral edge portion of the one surface of the opening forming member is formed in the opening portion in the stage of traveling toward the opening portion from the state where the blades are retracted outside the opening portion. The rear end side of the traveling direction of the blade toward the sliding portion becomes the sliding portion, and the member outer peripheral edge portion corresponds to the guide peripheral edge portion corresponding to the traveling range of the blade traveling on the opening forming member. It may be characterized in that they are connected together.
In such an aspect of the present invention, by receiving the blade retracted outside the opening at the member outer peripheral edge of the opening forming member, stable traveling of the blade toward the opening can be realized.

The present invention can also be widely applied to a light amount adjusting device including the above-described blade driving device or an imaging device such as a camera including the above-described blade driving device or light amount adjusting device.
In this aspect of the present invention, since the blade driving device capable of achieving both high-speed operation and silent operation of the blade is mounted, it is effective for improving the performance of the light amount adjusting device such as the shutter device and the diaphragm device and the imaging device such as the camera.

  According to the present invention, it is possible to realize a blade driving device, a light amount adjusting device, and an imaging device that can achieve both high-speed operation and silent operation of the blade.

1 is an exploded perspective view of a blade driving device (a diaphragm device) according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of a drive ring included in the blade driving device according to the first embodiment. FIG. 3 is a perspective view of a diaphragm blade included in the blade driving device according to the first embodiment. The perspective view of the ground plane which the blade | wing drive device which concerns on Embodiment 1 has. The front view of the ground plane which the blade | wing drive device which concerns on Embodiment 1 has. FIG. 3 is an enlarged view showing a superposition relationship between a base plate and a diaphragm blade in a fully opened state of the blade driving device according to the first embodiment. The other enlarged view which shows the superimposition relationship of the ground plane at the time of the blade drive of the blade drive device which concerns on Embodiment 1 and an aperture blade. The other enlarged view which shows the superimposition relationship of the base plate and aperture blade in the blade | wing fully closed cheer of the blade drive device which concerns on Embodiment 1. FIG. FIG. 3 is an external perspective view showing an assembled state of the blade driving device according to the first embodiment.

Hereinafter, the present invention will be described in detail based on embodiments.
The blade drive device of the present invention is configured to form a traveling space of a blade between an opening forming member that forms an opening through which light passes and a rotating member that rotates on one surface of the opening forming member. The opening forming member is characterized in that a sliding portion where the blade slides and a non-sliding portion where the blade does not slide are provided corresponding to the traveling range of the blade on the surface side where the blade travels. is there.

  Specifically, each of the plurality of blades included in the blade driving device of the present invention includes a first engagement portion that engages with the rotating member and a second engagement portion that engages with the guide portion included in the opening forming member. The travel range of the blades along the guide part is defined.

  That is, in the blade driving device of the present invention, the plurality of blades have an engaging relationship with both members between the opening forming member and the rotating member. When the rotating member is rotated on the opening forming member in the engaged state of these members, each of the plurality of blades travels along the guide portion of the opening forming member.

  In the present invention, on the surface side of the opening forming member on which the blade travels, a sliding portion is provided in which one surface (side surface) of the blade slides during the travel of the blade, and a portion other than the sliding portion. In addition, a non-sliding portion where one surface of the blade does not slide is provided in the range in which the blade travels.

  For this reason, in the present invention, each blade slides only with the sliding portion in the travel range, and a region where the blade does not slide is formed in a region where the non-sliding portion exists. Thereby, the sliding friction of a blade | wing is substantially reduced on a non-sliding part. Therefore, the present invention is effective when a plurality of blades are traveling at a high speed between the rotating member and the opening forming member, and is also effective for reducing noise during blade traveling because the sliding friction of the blades is reduced. is there.

  Here, the sliding part which an opening formation member has is provided in a rail-like continuous pattern corresponding to the travel range of a blade, for example, and the other area is a non-sliding part. In addition, a non-sliding part is a part which is located in the range which a blade | wing travels at least, and a blade | wing does not slide-contact.

  In addition, in a state where the second engaging portion of each blade is engaged with each guide portion of the opening forming member, a guide peripheral portion provided around each guide portion and a sliding contact portion that makes sliding contact with each blade Become. Further, the opening forming member is provided with an opening peripheral portion around the opening through which light passes, and this opening peripheral portion becomes a slidable contact portion in which the blades entering and exiting the opening are in sliding contact each time.

  Furthermore, since the gap between the guide peripheral edge of each guide portion and the opening peripheral edge of the opening corresponds to the blade passing between the guide peripheral edge and the opening peripheral edge of the opening, the front end side of the blade is received. The tip receiving portion and the base end receiving portion that receives the base end portion of the blade are connected as a sliding contact portion.

  As described above, in the present invention, in correspondence with the traveling range of the blade, mainly, the tip of the blade is in sliding contact with the tip receiving portion, and the base end portion of the blade is in sliding contact with the guide peripheral edge portion and the base end receiving portion. Other than that, it becomes a non-sliding part which a blade | wing does not slidably contact substantially. In other words, corresponding to the travel range of the blade, a sliding contact portion is provided so as to ensure stable travel of the blade, and the other portion is set as a non-sliding contact portion. Can be achieved.

  Moreover, the non-sliding part should just become a non-contact part corresponding to the travel range of a blade | wing, the recessed part provided in the opening formation member may be sufficient, and a through-hole may be sufficient as it. The concave portion is advantageous for light shielding, and the through hole is advantageous for reducing the weight of the opening forming member. Further, the sliding portion only needs to ensure stable running of the blade, and the surface thereof may be a flat surface or an uneven surface, but the uneven surface is more effective in reducing the sliding friction of the blade. . In addition, about the surface of a sliding part, you may surface-treat in order to improve slidability (sliding property).

  Further, when a plurality of blades are annularly arranged around an opening through which light passes, a sliding portion for one blade may be provided so as to overlap with a region where other blades travel. As a result, it is possible to evacuate a plurality of blades around the opening, which is advantageous for downsizing the blade driving device.

  Further, according to the configuration of the present invention, since friction between the blade and the opening forming member is reduced, generation of wear powder is suppressed, and even if wear powder is generated even slightly, the wear powder is not slid. It is possible to retract to the moving part side. That is, the sliding portion can prevent the wear powder from entering (or diffusing) into the opening through which light passes.

  In the above-described configuration of the present invention, for example, an opening forming member having a sliding portion and a non-sliding portion may be integrally formed by resin molding or the like, or the resin substrate is punched to remove the sliding portion and the non-sliding portion. A sliding portion may be formed, or a convex portion may be separately provided on the substrate to form a sliding portion, and other portions than the convex portion may be formed as non-sliding portions.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is an exploded view of an iris diaphragm device 6 as a light amount adjusting device that is Embodiment 1 of the present invention. FIG. 9 shows an assembled state of the diaphragm device 6 of the present embodiment. Although the diaphragm device will be described here, a shutter device and a diaphragm device having a shutter function are also included in the light amount adjusting device as an embodiment of the present invention.

  The aperture device 6 includes an actuator 1, a pressing plate (pressing member) 40, a drive ring 20, a plurality of aperture blades (light shielding blades) 10, a ground plate (base member) 50, and a photo interrupter 3.

  The actuator 1 is an electromagnetic actuator such as a stepping motor. A pinion gear 2 that rotates the drive ring 20 is attached to the output shaft of the actuator 1. The actuator 1 and the pinion gear 2 constitute a drive source unit.

  The photo interrupter 3 is used as a sensor for detecting the initial position of the drive ring 20. Reference numeral 4 denotes a sensor holding member that holds the photo interrupter 3. The sensor holding member 4 holding the actuator 1 and the photo interrupter 3 is attached to the holding plate 40 by screws 61 and 62, respectively.

  Reference numeral 5 denotes a central axis of the diaphragm device, which coincides with the optical axis of the imaging device when the diaphragm device is mounted on an imaging device described later. In the following description, a direction parallel to the central axis 5 is referred to as a thrust direction. The holding plate 40, the drive ring 20, the plurality of diaphragm blades 10, and the base plate 50 are stacked in this order in the thrust direction.

  That is, the drive ring 20 is disposed on the side opposite to the base plate 50 with respect to the aperture blade 10 in the thrust direction, and the holding plate 40 is disposed on the side opposite to the base plate 50 with respect to the aperture blade 10 and the drive ring 20. The In addition, a direction and a surface orthogonal to the thrust direction are referred to as a radial direction (radial direction) and a radial surface, respectively.

  A plurality of aperture blades 10 are arranged in the circumferential direction of the fixed opening 54 formed in the main plate 50. In this embodiment, eight diaphragm blades 10 are used. The number of diaphragm blades is not limited to eight, and may be other plural numbers.

  In FIG. 3, one aperture blade 10 is shown enlarged. The diaphragm blade 10 is arranged so as to be substantially parallel to the radial surface, and has a flat blade portion having a light shielding function, a drive pin 11 provided so as to protrude from the blade portion to opposite sides in the thrust direction, and And a cam pin 12. The positions of the drive pin 11 and the cam pin 12 in the radial plane are different from each other.

  In FIG. 2, the drive ring 20 is shown enlarged. The drive ring 20 has a light passage opening (opening) 24 at the center thereof, and further, a blade support as a first blade support portion provided at a plurality of circumferential positions (eight places) around the light passage opening. It has the projection part 22 and the connection part (ring shape part) 21 formed in the ring shape so that these eight blade | wing support projection parts 22 may be connected in the circumferential direction. The drive ring 20 is a member (rotating member) that rotates the opening periphery of the base plate 20 or the pressing plate 40.

  Each blade support protrusion 22 is formed to protrude radially outward from the connecting portion 21. Each of the eight blade support protrusions 22 is formed with a drive hole 23 into which the drive pins 11 of the eight aperture blades 10 are inserted and engaged.

  A gear portion 25 that meshes with the pinion gear 2 is formed on a part of the outer peripheral portion of the drive ring 20. The gear portion 25 extends in an arc shape in the circumferential direction and has a plurality of gear teeth formed on the outer periphery thereof, and extends radially outward from the connecting portion 21 and is connected to the gear tooth portion to be connected to the gear tooth portion. It is comprised by the two gear support | pillar parts 31 which form a space between the connection parts 21. FIG.

  The gear support 31 is formed with a drive hole 23 into which the drive pins 11 of the two diaphragm blades 10 are inserted and engaged. In other words, the gear support 31 also serves as two of the eight blade support protrusions 22.

  Further, at a plurality of circumferential positions (eight positions in the present embodiment) in the connecting portion 21 of the drive ring 20, radial support wall portions (rotating support portions) 26 extending from the connecting portion 21 to the holding plate side in the thrust direction. Is formed. Reference numeral 27 denotes a contact protrusion formed as a convex surface on the outer peripheral surface of the radial support wall portion 26. The contact protrusions 27 of the plurality of radial support wall portions 26 come into contact with the inner peripheral surface of the pressing plate 40, so that the drive ring 20 is fitted to the inner peripheral surface of the pressing plate 40 and can be rotated around the central axis 5. Supported.

  Furthermore, thrust hook portions 28 are provided at a plurality of circumferential positions (three locations in the present embodiment) on the holding plate side in the coupling portion 21 of the drive ring 20, and the ground plate side (throttle blade side) in the coupling portion 21 is provided. Thrust pressing protrusions 29 are provided at a plurality of locations in the circumferential direction (six locations in this embodiment). The thrust ring 28 and the thrust retainer projection 29 sandwich the inner peripheral portion (driving ring support portion) 41 of the pressing plate 40 in the thrust direction, so that the driving ring 20 is rotatably supported by the pressing plate 40 in the thrust direction. Is done.

  Further, at one place in the circumferential direction of the drive ring 20, there is provided a light shielding protrusion 30 that enters between the light emitting portion and the light receiving portion of the photo interrupter 3 and shields light.

  As shown in FIG. 1, the pressing plate 40 is formed in a ring shape having a light passage opening (opening) 44 in the center thereof, and the diaphragm blades 10 disposed between the pressing plate 40 and the ground plate 50 and It is arranged so as to cover (press) the drive ring 20, and is fixed to the main plate 50 with three screws 60. The pressing plate 40 is an example of an opening forming member that forms the light passage opening 44.

  FIG. 5 shows a front view of the main plate 50, and FIG. 6 shows the main plate 50 in an enlarged manner. The base plate 50 is formed in a ring shape having a light passage opening 54 as a fixed opening at the center thereof, and a plurality of (the diaphragm blades 10) with which the cam pins 12 of the plurality of diaphragm blades 10 are respectively engaged. 8) cam groove portions are formed. The ground plane 50 is an example of an opening forming member that forms the light passage opening 54.

  Further, an inner peripheral rail 52, an outer peripheral rail 53, and a blade support rail 56 having a width of about 1 mm are formed as blade support portions on the blade surface on the main plate side. In the present embodiment, “supporting (or pressing)” the diaphragm blades 10 gives looseness necessary for smooth rotation of the diaphragm blades 10, and the diaphragm blades 10 are more rattling or falling off. This means that the movement is restricted so as not to do. That is, it is not pressing so that there is no backlash in a direction other than the rotating direction (thrust direction).

  In the diaphragm device 6 configured as described above, when the actuator 1 operates and the pinion gear 2 rotates, the drive ring 20 moves around the central axis 5 (in the circumferential direction) with respect to the main plate 50 and the holding plate 40. Rotate.

  The drive ring 20 transmits the driving force from the actuator 1 to the eight aperture blades 10 via the drive pins 11. As a result, each diaphragm blade 10 rotates about the drive pin 11 as the cam pin 12 moves along the cam groove 51.

  By controlling the rotational position of the drive ring 20 by the actuator 1, the rotational position of the plurality of diaphragm blades 10, that is, the size (diameter of the aperture) (variable opening) formed by the blade portions of the plurality of diaphragm blades 10. ) Is controlled. The amount of light passing through the light passage openings 44, 24, 54 can be changed (adjusted) according to the aperture diameter.

  The detection of the initial rotation position of the drive ring 20 necessary for controlling the rotation position of the drive ring 20 is performed by the light-shielding protrusion 30 of the drive ring 20 entering between the light emitting part and the light receiving part of the photo interrupter 3. This can be done by detecting a signal indicating that light from the light is blocked.

  In the diaphragm device 6 of the present embodiment, the diaphragm blade 10 rotates while being in contact with the main plate 50. As shown in FIGS. 5 to 8, the diaphragm blade 10 includes an inner peripheral rail (opening peripheral portion) 52, an outer peripheral rail (member outer peripheral portion) 53, a blade supporting rail (guide peripheral portion 56 a, base end receiver) of the main plate 50. The portion 56b and the tip receiving portion 56c) 56 are sliding portions where they come into contact (slide), and it is preferable that the contact area is small while maintaining stable travel of the diaphragm blades 10. This is because the blade surface on the ground plate 50 side of the diaphragm blade 10 is not supported entirely by the blade sliding surface 255 of the ground plate 250 as in the conventional diaphragm device shown in FIG. 6, but the blade sliding surface of the ground plate 50. This is realized by adopting a configuration in which the diaphragm blade 10 is supported only by the inner peripheral rail 52, the outer peripheral rail 53, and the blade support rail 56 of the main plate 50 by providing the concave shape 55. On the other hand, the blade surface on the drive ring side of the diaphragm blade 10 is supported by the drive ring 20 as in the conventional case.

  The blade support rail 56 is arranged from the inner peripheral rail 52 of the main plate 50 toward the outer peripheral rail 53. Further, the blade support rail 56 is connected to the inner peripheral rail 52 and the outer peripheral rail 53, respectively, by connecting the cam peripheral support rail (guide peripheral portion) 56 a around the cam groove portion 51, respectively. Part) 56b, a blade middle second support rail (other base end receiving part) 56d, and a blade tip support rail (tip receiving part) 56c. The blade middle first support rail 56b, the blade tip support rail 56c, and the blade middle first support rail 56b extend from the inner peripheral rail 52 until reaching the inner peripheral rail portion of the cam peripheral support rail 56a. The rail 56c extends from the outer peripheral rail portion of the cam peripheral support rail 56a until it reaches the outer peripheral rail 53. Further, the blade support rails are provided for the number of blades around the optical axis.

  The inner peripheral rail 52 maintains the strength of the inner peripheral portion, supports the diaphragm blades 10, and is connected around the circumference so as not to be caught when opened and closed. On the other hand, since the outer peripheral rail 53 is connected around the outer peripheral portion, the outer peripheral rail 53 maintains strength and supports the aperture blade 10 when opened.

  The cam peripheral support rail 56a is connected around the cam groove portion 51, and maintains the strength of the cam groove portion 51 so that it is not caught when it is opened and closed. Further, the cam pin 12 of the aperture blade 10 prevents the cam groove portion 51 from falling off.

  As shown in FIG. 8, the blade middle first support rail 56 b has a role to support a convex portion on the outer diameter side of the diaphragm blade 10 that opens and closes between the inner peripheral rail 52 and the cam peripheral support rail 56 a. 10 is not caught.

  As shown in FIG. 6, the blade tip support rail 56c has a role of supporting the tip of the diaphragm blade 10 that opens and closes between the inner peripheral rail 52 and the cam peripheral support rail 56a, and prevents the diaphragm blade 10 from being caught. Yes.

  As shown in FIG. 7, the middle blade second support rail 56 d has a portion having the longest distance with respect to the inner diameter R on the outer diameter side of the diaphragm blade 10 that opens and closes between the cam peripheral support rail 56 a and the outer peripheral rail 53. It has a supporting role and prevents the diaphragm blade 10 from being caught.

  Therefore, as shown in FIGS. 10 and 13, compared with the conventional diaphragm device that supports the diaphragm blade 210 in contact with the base plate 250 in a large area, the diaphragm device 6 of the present embodiment has the diaphragm blade 10 on the base plate 50. By providing the blade supporting rail 56 for supporting the blade, it is possible to prevent the blade sliding surface from falling off from the concave shape 55, and the diaphragm blade 10 is secured to the base plate 50 while ensuring smooth rotation of the diaphragm blade 10. The frictional resistance received from can be reduced. For this reason, the aperture blade 10 can be smoothly rotated, and the control accuracy of the aperture opening can be improved.

  Further, since the frictional resistance is reduced, the rotation and stop of the drive ring 20 can be repeated at a high speed, and the rotation direction can be switched at a high speed, so that the high speed response of the diaphragm device 6 can be improved.

  In addition, since the frictional resistance is reduced, the sliding noise generated between the diaphragm blade 10 and the main plate 50 when the diaphragm blade 10 is opened and closed can be reduced, and the sliding scratches of the blade can be improved. it can.

  Furthermore, the inner peripheral rail 52, the outer peripheral rail 53, and the blade support rail 56 of the base plate 50 can be increased in strength due to the beam shape.

  In this embodiment, the case where the drive ring 20 is supported by the pressing plate 40 in the thrust direction has been described. However, the driving ring 20 is supported by the pressing plate 40 and the ground plate 50 in the thrust direction. Also good.

DESCRIPTION OF SYMBOLS 1 Actuator 2 Pinion gear 3 Photo interrupter 10 Aperture blade 20 Drive ring 40 Holding plate 50 Ground plate

Claims (10)

An opening forming member that forms an opening through which light passes;
A rotating member that rotates around the opening;
A plurality of blades disposed between the opening forming member and the rotating member,
The blade is provided with a first engagement portion that engages with the rotating member and a second engagement portion that engages with a guide portion of the opening forming member,
Each of the blades rotates the rotating member with the second engaging portion engaged with the guide portion of the opening forming member and the first engaging portion engaged with the rotating member. It is possible to travel along the guide portion of the opening forming member by movement,
Of the opening forming member, on the surface side on which the blades travel, a sliding portion on which one surface of the blade slides and a non-sliding portion on which one surface of the blade does not slide are provided. Feather drive device characterized.   The sliding portion is formed by partially connecting an opening peripheral portion provided at a peripheral portion of the opening portion, a guide peripheral portion provided at a peripheral portion of the guide portion, and the opening peripheral portion and the guide peripheral portion. A distal end receiving portion that receives the distal end side of the blade, and a proximal end receiving portion that partially connects the peripheral edge portion of the opening and the guide peripheral edge portion and receives a proximal end portion opposite to the distal end of the blade. The blade driving device according to claim 1.   3. The blade driving device according to claim 2, wherein at least a part of the base end receiving portion of the sliding portion includes a portion that always receives one surface of the blade during the travel of the blade. .   4. The blade according to claim 2, wherein in a state where each of the blades is retracted to the outside of the opening, one blade substantially overlaps the three adjacent guide peripheral portions. Drive device.   5. The sliding part according to claim 1, wherein the sliding part is constituted by a continuous same surface or a concavo-convex surface in a direction orthogonal to the optical axis direction of the opening. The blade drive device according to Item.   The blade driving device according to any one of claims 1 to 5, wherein the sliding portion is provided in the same pattern shape along the periphery of the opening.   7. The non-sliding portion is a groove portion formed on one surface side of the opening forming member or a penetrating portion penetrating the opening forming member in the thickness direction. The blade drive device according to Item 1. Of the one surface of the opening forming member, the outer circumferential edge of the member is in the traveling direction of the blade toward the opening in the stage of traveling toward the opening from the state where the blade is retracted to the outside of the opening. The sliding end slides on the rear end side,
8. The member outer peripheral portion is provided so as to be partially connected to the guide peripheral portion corresponding to a travel range of the blade traveling on the opening forming member. The blade driving device according to claim 1.   A light quantity adjusting device comprising the blade driving device according to any one of claims 1 to 8.   An imaging apparatus comprising the blade driving device according to claim 1.

Images