JP6543996B2 - Shutter device and optical apparatus - Google Patents

Description

  The present invention relates to a shutter device and an optical apparatus.

  A shutter device that opens and closes a shutter opening is mounted on an optical apparatus such as a digital camera. This type of shutter device engages a substrate having a shutter opening, a sector for opening and closing the shutter opening, and a sector between the open position where the shutter opening is opened and the closed position where the shutter opening is closed. And a drive pin for reciprocating the The sector is stopped at the closed position, for example, by the movement in the closing direction being restricted by the stopper.

  By the way, in the shutter device described above, when the sector moves in the closing direction, the sector may bounce back together with the drive pin in the opening direction (so-called bouncing) due to an impact when the sector abuts against the stopper. In this case, a part of the shutter opening may be temporarily opened, and there is a problem that an appropriate exposure amount can not be obtained. In particular, with the recent increase in the aperture size of the shutter and the increase in shutter speed, the drive energy for driving the sectors has been increased, and the bounce tends to be large.

  Therefore, in order to suppress the above-mentioned bounce, for example, Patent Document 1 below discloses a configuration in which a balance plate is provided which can be simultaneously rotated in the direction opposite to the sector as the drive pin reciprocates. According to this configuration, by applying a load to the sector in the direction opposite to the moving direction of the sector, it is supposed that the impact when the sector abuts the stopper can be mitigated and the bounce can be suppressed.

Patent No. 4652166

  However, in the configuration of Patent Document 1 described above, since the load is always applied to the sector from the balance plate during movement of the sector, the increase in aperture and the increase in shutter speed are realized, and It was difficult to suppress the occurrence.

  Therefore, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a shutter device and an optical apparatus capable of suppressing a bounce after realizing an increase in aperture diameter and an increase in shutter speed. .

In order to solve the above-mentioned subject, the shutter device of the present invention comprises a substrate having a shutter opening,
One side sector stacked on the substrate in the opening direction of the shutter opening and disposed on one side in the radial direction orthogonal to the opening direction, and opposite to the substrate with respect to the one side sector in the opening direction The other side sector stacked on the side and disposed on the other side in the radial direction, a pressing plate disposed on the opposite side to the one side sector in the opening direction with respect to the other side sector, and A substrate side receiving plate interposed between the one side sector and the substrate, an intermediate plate interposed between the one side sector and the other side sector, and a pressing plate side receiving plate interposed between the other side sector and the pressing plate When, the one engages with the side sectors and the other side sector, the shutter opening as can be closed from both sides in the radial direction, the reciprocating shift of the one side sector and the other side sector And a drive pin which, the one side sector and the other side sector, the drive pin in an open position in which said shutter opening is opened when in the starting position, the drive pin between the starting position and the end position The first contact portion is a closed position for closing the shutter opening in a range from an intermediate position to the end position, and the drive pin abuts from the start position side in the process from the start position to the end position. A brake sector movable toward the end position together with the one side sector and the other side sector after the drive pin abuts against the first abutment portion ; It is characterized in that it is provided between the substrate side receiving plate and the pressing plate side receiving plate in the opening direction .

According to this configuration, in the process of moving the drive pin from the start position to the end position, the load (braking force) directed to the start position with respect to the drive pin is obtained by contacting the first contact portion of the brake sector. And can brake the drive pin. As a result, for example, the impact when the sector abuts against the stopper or when the drive pin stops at the end position can be alleviated, and the bouncing of the drive pin can be suppressed.
In particular, until the drive pin abuts on the first contact portion, the drive pin runs idle with respect to the brake sector and no braking force is applied from the brake sector to the drive pin. Therefore, the load applied to the drive pin can be reduced as compared with the conventional configuration in which the sector is always loaded. As a result, it is possible to increase the aperture and to increase the shutter speed.

In the shutter device of the present invention, the drive pin may contact the first contact portion in the process of reaching the end position from the halfway position.
According to this configuration, since the drive pin abuts on the first contact portion in the process from the intermediate position to the end position, the braking force is applied from the brake sector to the drive pin after the sector is in the closed position. Therefore, it is possible to suppress the influence on the closing operation of the sector and to achieve the further increase in aperture diameter and the increase in shutter speed.

In the shutter device according to the present invention, the brake sector may be provided with a second contact portion that contacts the drive pin from the end position side to restrict the drive pin from bounding to the start position side. .
According to this configuration, when the drive pin bounces, the drive pin contacts the second contact portion of the brake sector from the end position side, thereby restricting the movement of the drive pin to the start position and closing each sector It will stay in position. As a result, it is possible to suppress the occurrence of the bounce while achieving a large aperture and a high shutter speed.

In the shutter device of the present invention, the brake sector may include a weight.
According to this configuration, since the brake sector includes the weight portion, the inertia of the brake sector can be adjusted by the weight of the weight portion. Thereby, a desired braking force can be applied to the drive pin.

An optical apparatus according to the present invention is characterized by including the shutter device according to the present invention.
According to this configuration, since the above-described shutter device is provided, it is possible to provide a high-performance optical device with a large aperture and a high shutter speed.

  According to the present invention, it is possible to suppress the occurrence of the bounce after realizing the large aperture and the high shutter speed.

1 is a block diagram of an optical device according to an embodiment of the present invention. In the shutter device concerning an embodiment of the present invention, it is a top view showing the state where a pressure board was removed. It is an exploded perspective view of a shutter device. It is a fragmentary sectional view of a shutter device. It is a figure for demonstrating the operation | movement of a shutter apparatus, Comprising: It is a top view corresponded in FIG. It is a figure for demonstrating the operation | movement of a shutter apparatus, Comprising: It is a top view corresponded in FIG. It is a figure for demonstrating the operation | movement of a shutter apparatus, Comprising: It is a top view corresponded in FIG. It is a figure for demonstrating the operation | movement of a shutter apparatus, Comprising: It is a top view corresponded in FIG.

Next, an embodiment of the present invention will be described based on the drawings.
[Optical equipment]
FIG. 1 is a block diagram of an optical device 100.
As shown in FIG. 1, the optical device 100 is used as, for example, a digital camera, and includes a shutter device 1, a control unit 101, and an imaging element 102.

The control unit 101 controls the entire operation of the optical device 100, and includes a CPU, a ROM, a RAM, and the like.
The image sensor 102 is, for example, a CCD or a CMOS image sensor, and converts an object image formed by light into an electrical signal.
The optical device 100 is also provided with a lens or the like for adjusting the focal length, which is not shown in FIG.

<Shutter device>
FIG. 2 is a plan view showing a state in which the pressing plate 4 is removed in the shutter device 1. FIG. 3 is an exploded perspective view of the shutter device 1. In FIG. 2, the middle support plate 57 described later is not shown, and a brake sector 65 described later is indicated by a chain line.
As shown in FIGS. 2 and 3, the shutter device 1 includes a substrate 3 having a shutter opening 2 and a pressing plate 4 which is superimposed on the substrate 3 and which defines a shutter chamber S with the substrate 3. A plurality of sectors (a first sector 6 and a second sector 7) housed in the shutter chamber S and opening and closing the shutter opening 2 are provided. In the present embodiment, the substrate 3 and the pressing plate 4 have an annular shape in plan view, and are arranged coaxially with each other. Therefore, in the following description, a direction along the axis O of the substrate 3 and the pressing plate 4 is referred to as an axial direction, the pressing plate 4 side in the axial direction is referred to as the front, and the substrate 3 side is referred to as the rear. Further, a direction orthogonal to the axis O is referred to as a radial direction, and a direction around the axis is referred to as a circumferential direction.

  The substrate 3 has a bottom wall portion 11 and a peripheral wall portion 12 erected forward from the outer peripheral edge of the bottom wall portion 11. At the central portion in the radial direction of the bottom wall portion 11, the above-described shutter opening 2 which penetrates the bottom wall portion 11 in the axial direction is formed. On the rear surface of the bottom wall portion 11, an actuator 14 (see FIG. 3) is disposed for engaging the sectors 6 and 7 and a brake sector 65 described later to reciprocate the sectors 6 and 7 and the brake sector 65. It is set up. A drive pin 13 is connected to an output shaft (not shown) of the actuator 14. The drive pin 13 protrudes to the front side of the bottom wall portion 11 through the insertion hole 15 formed in the bottom wall portion 11. In the illustrated example, the insertion hole 15 has an arc shape centered on the output shaft of the actuator 14 and is an elongated hole extending in the radial direction. Thereby, in the insertion hole 15, the drive pin 13 has a start position (see FIG. 2) approaching or abutting on the radially outer end edge, and a termination position adjacent or abutting on the radially inner end edge (FIG. 6) And so on) can be reciprocated according to the drive of the actuator 14.

  In the bottom wall portion 11, a pair of first support pins 21 are erected toward the front side at portions positioned on both sides in the circumferential direction with respect to the insertion hole 15 described above. Further, in the bottom wall portion 11, a pair of second support pins 22 is erected toward the front side at a portion positioned between the first support pins 21 and the insertion holes 15.

As shown in FIG. 3, the pressing plate 4 stands from the outer peripheral edge of the top wall 31 toward the rear from the outer peripheral edge of the top wall 31 facing the bottom wall 11 of the substrate 3 at an interval in the axial direction. And a peripheral wall portion 32 provided. At the central portion in the radial direction of the top wall portion 31, an escape hole 33 having a diameter larger than that of the shutter opening 2 is formed while penetrating the top wall portion 31 in the axial direction.
The holding plate 4 is assembled to the substrate 3 in a state where the peripheral wall 32 is in contact with the peripheral wall 12 of the substrate 3 in the axial direction. A space defined by the substrate 3 and the pressure plate 4 defines a shutter chamber S for housing the sector.

  The sectors 6 and 7 each have a pair of a first sector 6 and a second sector 7 stacked in the axial direction. The first sector 6 and the second sector 7 are symmetrical lines extending in the radial direction, passing through the drive pin 13 and the axis O described above at the start position so that the shutter opening 2 can be closed from both sides in the radial direction. One piece is disposed on each side of L. Therefore, in the following description, the first sector 6 and the second sector 7 positioned on one side (left side in FIG. 2) with respect to the above-mentioned line of symmetry L are taken as one set of one-side sector group 41. The first sector 6 and the second sector 7 located on the other side (right side in FIG. 2) will be described as one set of the other side sector group 42. Further, in the following description, the one side sector group 41 will be mainly described, and the configuration corresponding to the one side sector group 41 in the other side sector group 42 may be denoted by the same reference numeral and the description may be omitted.

  In the one-side sector group 41, the first sector 6 has an arc shape in plan view, and is disposed so as to surround the shutter opening 2 from one side with respect to the symmetry line L. At the base end of the first sector 6, a first support hole 44 is formed through which the first support pin 21 of the above-mentioned first support pins 21 located on the other side with respect to the symmetry line L is inserted. There is. The proximal end of the first sector 6 is located on the other side of the second support pin 22 described above with respect to the line of symmetry L in a portion located closer to the line of symmetry L with respect to the first support hole 44 A guide hole 45 through which the second support pin 22 is inserted is formed. The guide holes 45 are arc-shaped long holes centered on the first support holes 44. Further, at the base end of the first sector 6, at a portion located on the symmetry line L, a first cam hole 46 through which the above-described drive pin 13 is inserted is formed. The first cam hole 46 is an elongated hole extending along a straight line passing through the first support pin 21 and the drive pin 13.

  The second sector 7 has an arc shape having a radius of curvature larger than that of the first sector 6 described above, and is disposed to surround the shutter opening 2 from one side with respect to the symmetry line L. At the base end of the second sector 7, a second support hole 51 is formed in which the second support pin 22 positioned on the other side with respect to the symmetry line L among the second support pins 22 described above is inserted. There is. At the proximal end of the second sector 7, a second cam hole 52 in which the above-described drive pin 13 is inserted is formed in a portion located on the symmetry line L. The second cam hole 52 is a long hole extending along a straight line passing through the second support pin 22 and the drive pin 13.

FIG. 4 is a partial cross-sectional view of the shutter device 1.
As shown in FIGS. 2 to 4, in the state in which the one-side sector group 41 interposes the substrate-side support plate 54 with the bottom wall portion 11 of the substrate 3, the order of the first sector 6 and the second sector 7 is Is stacked on. The sectors 6 and 7 of the one-side sector group 41 are configured to be rotatable around the corresponding support pins 21 and 22 by the movement of the drive pin 13 accompanying the drive of the actuator 14. The substrate side receiving plate 54 has an annular shape in a plan view, and suppresses interference between the first sector 6 and the substrate 3 when the one-side sector group 41 moves.

  As shown in FIGS. 2 and 3, in the other-side sector group 42, the first sector 6 is disposed so as to surround the shutter opening 2 from the other side with respect to the symmetry line L. The first support pins 21 of the first support pins 21 located on one side with respect to the symmetry line L are inserted into the first support holes 44 of the first sector 6. The second support pins 22 of the second support pins 22 located on one side with respect to the symmetry line L are inserted through the guide holes 45 of the first sector 6. The drive pin 13 is inserted through the first cam hole 46 of the first sector 6.

  In the other side sector group 42, the second sector 7 is disposed to surround the shutter opening 2 from the other side with respect to the symmetry line L. The second support pins 22 of the second support pins 22 located on one side with respect to the symmetry line L are inserted through the second support holes 51 of the second sector 7. Further, the drive pin 13 is inserted into the second cam hole 52 of the second sector 7.

  As shown in FIGS. 3 and 4, the other side sector group 42 is stacked in the order of the second sector 7 and the first sector 6 with the middle receiving plate 57 interposed between the other side sector group 41. ing. The respective sectors 6 and 7 of the other side sector group 42 move around the corresponding support pins 21 and 22 in the opposite direction to the respective sectors 6 and 7 of the one side sector group 41 by the movement of the drive pin 13 accompanying the drive of the actuator 14 Is configured to be rotatable. The middle receiving plate 57 has an annular shape in plan view, and when the sector groups 41 and 42 move, the one side sector group 41 (second sector 7) and the other side sector group 42 (first sector 6) Suppress the interference of

  Each of the sectors 6 and 7 reciprocates from an open position where the shutter opening 2 is completely opened to a closed position where the shutter opening 2 is completely closed, with the movement of the drive pin 13. In this case, each of the sectors 6 and 7 is in the open position when the drive pin 13 is at the start position, and is in the closed position in the range from the middle position between the start position and the end position to the end position. That is, in the present embodiment, when the drive pin 13 reaches the middle position shown in FIG. 5 in the sectors 6 and 7, the inner peripheries of the second sectors 7 in the sector groups 41 and 42 overlap each other to form the shutter opening 2 Completely occlude. Thereafter, the sectors 6 and 7 move further in the closing direction while the drive pin 13 moves from the middle position to the end position shown in FIG. 6 so that the second sectors 7 of the sector groups 41 and 42 are in the axial direction Overlap.

  As shown in FIGS. 2 and 3, in the bottom wall portion 11, a closed position stopper 61 is separately provided in a portion located on the opposite side to the side of the line of symmetry L with respect to each first support pin 21. ing. The closed position stopper 61 abuts on the base edge of each of the sectors 6 and 7 when the drive pin 13 is at the end position (the sectors 6 and 7 are in the closed position), and the sectors 6 and 7 are closed. Regulate movement. Further, in the bottom wall portion 11, an open position stopper 62 is separately provided in a portion located on the opposite side to the side of the symmetry line L with respect to the closed position stopper 61. The open position stopper 62 abuts on the outer peripheral edge of each of the sectors 6 and 7 when the drive pin 13 is at the starting position (the respective sectors 6 and 7 are in the open position), and the movement of the sectors 6 and 7 in the opening direction Regulate. In addition, the regulation of the rotation range of each of the sectors 6 and 7 may be performed by the drive pin 13 abutting on the inner peripheral edge of the insertion hole 15.

  Here, on the front side of the other side sector group 42, a brake sector 65 for braking the drive pin 13 is stacked. Specifically, the brake sector 65 has a base 66, and a weight portion 67 extending in a cantilevered manner from the base 66. Of the first support pins 21 described above, the base 66 is provided with a support hole 71 through which the first support pin 21 positioned on the other side with respect to the symmetry line L is inserted. The brake sector 65 is rotatable around the first support pin 21 according to the movement of the drive pin 13. Of the second support pin 22 described above, the second support pin 22 positioned on the other side with respect to the symmetry line L is inserted through a portion of the base 66 located closer to the symmetry axis L with respect to the support hole 71 The guide hole 72 is formed.

  In the base portion 66 of the brake sector 65, a braking hole 74 in which the above-described drive pin 13 is loosely inserted is formed in a portion located on the symmetry line L. The braking hole 74 is a long hole extending in the moving direction of the drive pin 13 and is formed wider than the above-described guide hole 72. The braking hole 74 is enlarged toward the end position side in the moving direction of the drive pin 13. That is, when the drive pin 13 described above is at the start position, an end edge on the start position side in the movement direction of the drive pin 13 in the inner peripheral edge of the braking hole 74 Section) 74a) in proximity to or in contact with. Further, when the drive pin 13 reaches the halfway position described above, an end edge on the end position side in the moving direction of the drive pin 13 (hereinafter referred to as a terminal side contact portion (first The brake sector 65 is rotated around the first support pin 21 together with the sectors 6 and 7 in the process of coming into contact with the contact portion 74b) and reaching the end position from the halfway position. Thus, the brake sector 65 is configured to start pivoting with a time difference with respect to the pivoting movement from the open position of each of the sectors 6 and 7 toward the closed position.

  The weight portion 67 is formed in a rectangular shape in a plan view, and is extended following the one-side sector group 41. The dimensions (for example, length, thickness, etc.) of the weight portion 67 can be appropriately adjusted by the inertia applied to the brake sector 65. Further, the weight portion 67 abuts the above-described open position stopper 62 when the drive pin 13 is at the starting position (the starting position of the brake sector 65), whereby the movement of the brake sector 65 in the opening direction is restricted. .

  As shown in FIGS. 3 and 4, the pressing plate 4 described above is disposed on the front side of the brake sector 65 via the pressing plate side receiving plate 75. The pressing plate side receiving plate 75 has an annular shape in a plan view, and suppresses interference between the brake sector 65 and the pressing plate 4 when the sectors 6 and 7 and the brake sector 65 move.

<Operation of shutter device>
Next, the operation of the above-described shutter device 1 will be described. 5-8 is a figure for demonstrating the operation | movement of the shutter apparatus 1, Comprising: It is a top view corresponded in FIG.
First, the closing operation of the sectors 6 and 7 will be described.
As shown in FIG. 2, when the actuator 14 is driven with the drive pin 13 at the start position, the drive pin 13 moves in the insertion hole 15 radially inward (end position). Then, as shown in FIG. 5, with the movement of the drive pin 13, the sectors 6, 7 move in the closing direction by rotating around the corresponding support pins 21, 22. Each of the sectors 6 and 7 becomes a closed position where the sectors 6 and 7 close the shutter opening 2 when the drive pin 13 reaches the above-mentioned halfway position. Thereafter, as shown in FIG. 6, in the process of the drive pin 13 passing through the middle position and reaching the end position, the sectors 6 and 7 are further rotated in the closing direction to abut the closing position stopper 61. . As a result, the rotational movement of the sectors 6 and 7 in the closing direction is restricted, and the drive pin 13 is stopped at the end position.

  Here, as shown in FIGS. 2 and 5, in the process of moving the drive pin 13 to the end position, the end side contact portion 74b of the braking hole 74 in the brake sector 65 is made between the start position and the middle position. There is a gap between the drive pin 13 and the drive pin 13. Therefore, while the drive pin 13 extends from the start position to the middle position, the drive pin 13 runs idle in the braking hole 74 relative to the brake sector 65. Therefore, only the sectors 6 and 7 move in the closing direction, and the brake sector 65 remains stationary with respect to the drive pin 13 and the sectors 6 and 7. Thus, only the load for operating the sectors 6 and 7 acts on the drive pin 13 (actuator 14), and the load (braking force) for operating the brake sector 65 does not act.

  Thereafter, when the drive pin 13 reaches an intermediate position, the drive pin 13 abuts on the end side contact portion 74b of the braking hole 74 in the brake sector 65 from the start position side. In this state, as shown in FIG. 6, by moving the drive pin 13 from the middle position toward the end position, the brake sector 65 rotates in the closing direction with the sectors 6 and 7 around the first support pin 21. Do. That is, in the drive pin 13, the load for operating the brake sector 65 in addition to the sectors 6 and 7 acts as a braking force from the halfway position to the end position.

  Also, as shown in FIGS. 6 and 7, when the drive pin 13 moves the sectors 6 and 7 to the end position, the starting point side contact portion 74 a of the braking hole 74 in the brake sector 65 and the drive pin 13 There is a gap between the Therefore, when the brake sector 65 rotates about the first support pin 21 with respect to the drive pin 13 due to its inertia, the start-side contact portion 74 a of the braking hole 74 approaches the drive pin 13. That is, the brake sector 65 moves to a position where the starting point side contact portion 74 a of the braking hole 74 approaches or abuts on the drive pin 13 between the end position and the middle position.

  By the way, as shown in FIG. 8, the drive pin 13 may bounce from the end position toward the start position due to an impact when each of the sectors 6 and 7 mentioned above abuts on the closed position stopper 61. At this time, when the drive pin 13 moves toward the starting position by bounding, the driving pin 13 abuts on the start side contact portion 74 a of the braking hole 74 in the brake sector 65 from the end position side, and the starting point of the driving pin 13 Movement to position is regulated. As a result, the bounding of the drive pin 13 is restricted, and the sectors 6 and 7 remain in the closed position.

Next, the opening operation of the sectors 6 and 7 will be described.
As shown in FIG. 7, when the actuator 14 is driven with the drive pin 13 at the end position, the drive pin 13 moves in the insertion hole 15 toward the outside in the radial direction (start point position). Then, as the drive pin 13 moves, the sectors 6 and 7 rotate around the corresponding support pins 21 and 22 to move in the opening direction. Then, as shown in FIG. 2, when the drive pin 13 reaches the start position, the shutter opening 2 is in the open position where it is completely opened. At this time, the sectors 6 and 7 abut the open position stopper 62, and the movement in the open direction is restricted.

  Further, as shown in FIG. 7, when the drive pin 13 abuts on the start side contact portion 74 a of the braking hole 74 in the brake sector 65 in the process of moving the drive pin 13 from the end position to the start position, Turns in the opening direction with the sectors 6 and 7 around the first support pin 21. Thereafter, as shown in FIG. 2, the brake sector 65 abuts on the open position stopper 62 to restrict the movement in the opening direction.

As described above, in the present embodiment, the brake sector 65 is configured to have the end-side contact portion 74b that abuts from the start position side in the process where the drive pin 13 reaches the end position from the start position.
According to this configuration, in the process of moving the drive pin 13 from the start position to the end position, the load directed to the start position with respect to the drive pin 13 by contacting the end side abutting portion 74b of the braking hole 74 ( The braking force can be applied to brake the drive pin 13. Thereby, the impact when the sectors 6 and 7 contact the closed position stopper 61 can be alleviated, and the bounding of the drive pin 13 can be suppressed.
In particular, in the present embodiment, the drive pin 13 runs idle with respect to the brake sector 65 until the drive pin 13 abuts on the end side contact portion 74 b of the braking hole 74, and the brake sector 65 is controlled to the drive pin 13. It is not powered. Therefore, the load applied to the drive pin 13 can be reduced as compared with the conventional configuration in which the sector is always loaded. This makes it possible to increase the aperture and increase the shutter speed.

  Further, in the present embodiment, since the drive pin 13 contacts the end contact portion 74b of the braking hole 74 in the process from the middle position to the end position, after the sectors 6 and 7 are in the closed position A braking force is applied to the drive pin 13. Therefore, it is possible to suppress the influence of the closing operation of the sectors 6 and 7 from being affected, and further increase the aperture and increase the shutter speed.

  Further, when the drive pin 13 bounces, the drive pin 13 abuts on the start point side contact portion 74 a of the braking hole 74 in the brake sector 65, whereby the movement of the drive pin 13 to the start position is restricted. , 7 will stay in the closed position. As a result, it is possible to suppress the bounce after achieving a large aperture and a high shutter speed.

  Furthermore, since the pressing plate side receiving plate 75 is disposed on the front side (one side in the stacking direction) with respect to the brake sector 65, compared to the configuration in which the sectors are disposed on both sides of the brake sector 65, the sector 6 , 7 can be suppressed. Thereby, the braking force can be applied to the drive pin 13 at a desired position.

  Further, in the present embodiment, since the brake sector 65 includes the weight portion 67, the inertia of the brake sector 65 can be adjusted by the weight of the weight portion 67. Thereby, a desired braking force can be applied to the drive pin 13.

  And since the optical device 100 of the present embodiment includes the above-described shutter device 1, it is possible to provide a high-performance optical device 100 with a large aperture and a high shutter speed.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
For example, in the embodiment described above, the configuration in which the drive pin 13 abuts on the end side contact portion 74b of the brake sector 65 in the middle position in the process from the start position to the end position has been described. That is, as long as the drive pin 13 is in contact with the end contact portion 74b in the process from the start position to the end position, the drive pin 13 may be on the front side or the back side.

In the embodiment described above, the configuration has been described in which the end edge of the braking hole 74 in the brake sector 65 is the first contact portion and the second contact portion with which the drive pin 13 contacts, but the invention is not limited thereto. The contact portion and the second contact portion may be separately formed by a projection or the like. In addition, the brake sector 65 may have at least a first contact portion.
In the embodiment described above, although the configuration in which the brake sector 65 is disposed between the pressing plate side receiving plate 75 and the other side sector group 42 has been described, the present invention is not limited thereto. For example, the brake sector 65 may be disposed between the middle receiving plate 57 and any of the sector groups 41 and 42, and the brake sector 65 may be disposed between the substrate side receiving plate 54 and the one side sector group 41. It may be set. Further, the brake sector 65 may be disposed between the pair of receiving plates, and the brake sector 65 may be disposed between the sectors 6 and 7.

In the embodiment described above, the configuration in which the first sector 6 and the second sector 7 are provided one by one has been described. However, the present invention is not limited to this, and the number of sectors 6 and 7 can be changed in design as appropriate.
In the embodiment described above, the configuration in which one brake sector 65 is provided has been described. However, the configuration is not limited thereto, and a configuration in which a plurality of brake sectors 65 are provided may be used.

  In addition, it is possible to replace the components in the above-described embodiment with known components as appropriate without departing from the spirit of the present invention, and the above-described modifications may be combined as appropriate.

1 ... shutter device 2 ... shutter opening 3 ... substrate 6 ... 1st sector (sector)
7 second sector (sector)
13 ... Drive pin 65 ... Brake sector 67 ... Weight part 74a ... Contact point on the starting point side (second contact part)
74b · · · · Contact end portion on the end side (first contact portion)
75: Holding plate side receiving plate 100: Optical device

Claims (5)

A substrate having a shutter opening;
One side sector stacked on the substrate in the opening direction of the shutter opening and disposed on one side in the radial direction orthogonal to the opening direction;
The other side sector stacked on the side opposite to the substrate with respect to the one side sector in the opening direction and disposed on the other side in the radial direction;
A pressing plate disposed on the opposite side to the one side sector in the opening direction with respect to the other side sector;
A substrate side support plate interposed between the one side sector and the substrate;
An intermediate plate interposed between the one side sector and the other side sector;
A pressing plate side receiving plate interposed between the other side sector and the pressing plate;
The one engages with the side sectors and the other side sector, the shutter opening as can be closed from both sides in the radial direction, and a driving pin for reciprocating the one side sector and the other side sector,
The one-side sector and the other-side sector become an open position where the shutter opening is opened when the drive pin is at the start position, and the end is from the middle position between the start position and the end position It becomes a closed position that closes the shutter opening in the range to the position,
After the driving pin has a first contact portion that contacts from the start position side in the process of reaching the end position from the starting position, the drive pin abuts on the first abutting section, the one side A brake sector movable toward the end position together with the sector and the other side sector ,
The shutter device is characterized in that the brake sector is provided between the substrate side receiving plate and the pressing plate side receiving plate in the opening direction .   The shutter device according to claim 1, wherein the drive pin abuts on the first contact portion in a process of reaching the end position from the halfway position.   2. The brake sector according to claim 1, wherein the brake sector includes a second contact portion that contacts the drive pin from the end position side to restrict the drive pin from bouncing toward the start position side. The shutter device according to claim 2. The shutter device according to any one of claims 1 to 3 , wherein the brake sector includes a weight portion. An optical apparatus comprising the shutter device according to any one of claims 1 to 4 .

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