JP2011158792A - Imaging apparatus - Google Patents

Abstract

A first groove portion used for driving an external device is provided on the outer diameter side of a cylindrical member that drives a lens barrel without enlarging an imaging device, and a second groove portion different from the first groove portion is provided on an inner diameter side. An imaging device that can be provided is provided.
A driving ring 30 that rotates and drives a lens barrel, a strobe cam 30a provided on the outer diameter side of the driving ring 30, and a strobe follower that engages and follows the strobe cam 30a. 39, a compression spring 40 that urges the strobe follower 39, and a slider 37 that moves along the strobe cam 30a when the strobe follower 39 follows the strobe cam 30a. The strobe follower 39 has a first depth in the first region in the rotation direction of the first cylindrical member, and a second depth shallower than the first depth in the second region.
[Selection] Figure 6

Description

  The present invention relates to an imaging apparatus.

  There has been proposed an imaging apparatus that includes an external device such as a finder or a strobe capable of zooming or popping up and that drives the external device in conjunction with driving of the lens barrel. For example, in Patent Document 1 described below, the lens of the finder is driven in the optical axis direction, and the strobe is protruded or stored in conjunction with the retracting operation from the retracted position of the lens barrel to the retracted position. Proposes a camera. This camera includes a cam barrel that rotates around the outer periphery of the lens barrel. Then, the finder lens is moved or the strobe is projected and stowed by engaging and rotating the finder and the follower pin applied to the holding frame of the strobe in the cam groove outside the cam barrel.

JP 07-199295 A

  In the camera proposed in Patent Document 1, the amount of follower pin engagement is always constant. Therefore, if a cam groove or a rectilinear groove other than the cam groove provided outside the cam cylinder is provided inside the cam cylinder for driving the finder or strobe, Inside it is necessary to allocate the depth of the inner and outer grooves. For example, lay out so that the grooves do not intersect between the inside and outside of the cam tube, or let the groove penetrate through the intersection, or if not, take measures such as increasing the wall thickness of the cam tube There is a need. However, when the layout is made so that the grooves do not intersect between the inside and the outside of the cam cylinder, there is a problem that the layout of the grooves is limited. Further, when the groove is passed through the crossing portion of the groove, there is a problem that the penetration weakens the component strength and the light leakage. Further, when the thickness of the cam cylinder is increased, there is a problem that the entire camera becomes large.

  The present invention has been made to solve at least one of the problems described above. The present invention provides a first groove portion used for driving an external device on the outer diameter side of a cylindrical member for driving a lens barrel without enlarging an imaging device, and a second groove portion different from the first groove portion on the inner diameter side. An object of the present invention is to provide an imaging apparatus capable of providing

  An imaging device according to an embodiment of the present invention includes a first cylindrical member that rotates to drive a lens barrel, a first groove provided on the outer diameter side of the first cylindrical member, and the first And a follower that follows the first groove in conjunction with the rotation of the first cylindrical member, and the follower follows the normal of the outer peripheral surface of the first cylindrical member. A first urging member for urging in the direction, the first urging member and the follower are provided, and the follower follows the first groove so that the first groove A movable member that moves along, and a regulating member that regulates the movement of the movable member in the optical axis direction. The first groove has a first depth in a first region in the rotation direction of the first cylindrical member, and a second depth shallower than the first depth in a second region. .

  According to the present invention, the first groove portion used for driving the external device on the outer diameter side of the cylindrical member that drives the lens barrel without enlarging the imaging apparatus, and the second groove portion different from the first groove portion on the inner diameter side are used. Can be provided.

It is an example of the external appearance perspective view of an imaging device. It is an example of the exploded perspective view of a lens barrel. It is an example of the disassembled perspective view of a light emission unit. It is a figure explaining the interlocking of a lens barrel and a light emitting unit. It is a figure explaining the change of the state of a light emission unit. It is a figure which shows the operation example of the slider accompanying operation of an imaging device. It is a figure which shows the positional relationship of the groove | channel provided in the drive ring. It is a figure explaining operation | movement of the finder and strobe with which an imaging device is provided. It is a figure explaining operation | movement of a strobe follower.

  With reference to FIGS. 1 to 7, an imaging apparatus according to a first embodiment of the present invention will be described. This imaging device is a camera including, for example, a pop-up light emitting unit 1. The light emitting unit 1 is, for example, a strobe.

  FIG. 1 is an example of an external perspective view of the imaging apparatus according to the first embodiment. FIG. 1A illustrates an imaging device in a non-light emitting state. FIG. 1B shows the imaging device when the power is turned on. In the state shown in FIG. 1B, the light emitting unit 1 protrudes above the imaging device, and the imaging device can emit light. The light emitting unit 1 includes a plurality of components to be described later such as a cover member 2 that forms a part of the upper surface of the imaging device. The light emitting unit 1 rotates in conjunction with a lens barrel drive ring 30 (see FIG. 2) located in the center of the imaging device, and the state is switched from the stored state to the protruding state, or from the protruding state to the stored state.

  FIG. 2 is an example of an exploded perspective view of a lens barrel included in the imaging apparatus. The optical system of this lens barrel includes a first group lens, a second group lens, and a third group lens that is a focusing lens (not shown). The first group lens is held by the first group lens holder 10, and the second group lens is held by the second group lens holder 11. The rectilinear guide plate 12 is provided with a plurality of protrusions 16 on the outer edge portion of the flange portion. The protrusions 16 are respectively engaged with a plurality of grooves 18 extending in the optical axis direction provided on the inner surface of the fixed cam ring 17, so that the rotation operation is restricted and supported so as to be movable in the optical axis direction. The straight guide plate 12 engages with a groove (not shown) formed in the inner surface of the first group lens holder 10 and extending in the optical axis direction, and supports the first group lens holder 10 so as to be movable in the optical axis direction. 13 is provided. Similarly, a second group guide rod 15 that engages with a second group rectilinear hole 14 provided on the outer periphery of the second group lens holder 11 and supports the second group lens holder 11 so as to be movable in the optical axis direction is integrally provided. It has been. Accordingly, the first group lens holder 10 and the second group lens holder 11 are configured to be movable in the optical axis direction.

  The moving cam ring 19 is a second cylindrical member provided on the inner diameter side of the drive ring 30. The moving cam ring 19 rotates around the optical axis by the rotational force transmitted from the moving cam ring 19. Cam followers 20 provided on the outer surface of the movable cam ring 19 at equal angles at three locations are cam-engaged with three cams 21 of the same shape provided on the inner surface of the fixed cam ring 17, respectively. As the moving cam ring 19 rotates, the engagement position of the cam follower 20 moves along the trajectory of the cam 21, so that the moving cam ring 19 can advance and retreat in the optical axis direction while rotating. Further, when the hook 23 of the rectilinear guide plate 12 is engaged with a flange 22 provided at the rear end portion of the inner surface of the movable cam ring 19, the rectilinear guide plate 12 is rotatably engaged with the movable cam ring 19. To do. Thereby, along with the displacement of the movable cam ring 19 in the optical axis direction, both the rectilinear guide plates 12 can be displaced in the optical axis direction.

  The first group cam follower 24 provided on the outer surface portion of the first group lens holder 10 at three equal angles is cam-engaged with three first group cams 25 of the same shape provided on the inner surface of the movable cam ring 19. To do. As the moving cam ring 19 rotates, the engagement position of the first group cam follower 24 moves along the locus of the first group cam 25. Since the first group lens holder 10 is guided to move in the optical axis direction as described above, the first group lens holder 10 moves in the optical axis direction of the first group cam 25 as the movable cam ring 19 rotates. Displace according to the amount of displacement.

  The second group cam follower 26 provided on the outer surface of the second group lens holder 11 at three equal angles is cam-engaged with three second group cams 27 of the same shape provided on the inner surface of the movable cam ring 19. To do. As the moving cam ring 19 rotates, the engagement position of the second group cam follower 26 moves along the locus of the second group cam 27. Further, as described above, since the second group lens holder 11 is guided so as to move in the optical axis direction, the second group lens holder 11 moves in the optical axis direction of the second group cam 27 as the movable cam ring 19 rotates. It will be displaced according to the amount of displacement.

  On the outer surface of the movable cam ring 19, drive pins 28 are provided at three equal angles. The drive pin 28 is a protruding member that transmits the rotational force from the drive ring 30. The drive pin 28 protrudes from the outer surface of the fixed cam ring 17 through a cam hole 29 penetrating from the inner surface of the fixed cam ring 17 to the outer surface. The trajectories of the cam 21 and the cam hole 29 have the same shape. The drive pin 28 maintains a state where the drive pin 28 protrudes along the locus of the cam hole 29 with respect to the rotational extension movement of the movable cam ring 19 with respect to the fixed cam ring 17.

  The drive ring 30 is fitted to the outer surface of the fixed cam ring 17 and is rotatably supported. On the inner surface of the drive ring 30, grooves 31 extending in the optical axis direction are arranged at three equal angles. The groove 31 is a groove (second groove) that engages with the drive pin 28. Thereby, the rotation of the drive ring 30 is transmitted to the movable cam ring 19 via the groove 31 and the drive pin 28. As described above, the first group lens holder 10, the second group lens holder 11, the rectilinear guide plate 12, the fixed cam ring 17, the movable cam ring 19, and the drive ring 30 are integrated and operate in cooperation with each other. The integrated parts are assembled into the lens barrel base 32. Furthermore, the lens barrel is configured by fixing an image sensor holder 33 holding an image sensor (not shown) together with the lens barrel base 32 so as to sandwich the flange portion of the fixed cam ring 17. That is, the drive ring 30 has a function as a first cylindrical member that rotates to drive the lens barrel.

  The lens barrel drive source 44 is an electromagnetic motor that converts electric power into power. The power of the drive source 44 is transmitted to the drive ring gear 46 provided on the outer surface of the drive ring 30 via the gear train 45. Thereby, the drive ring 30 can be rotated in response to energization of the drive source 44 from the imaging apparatus main body.

  FIG. 3 is an example of an exploded perspective view of the light emitting unit. A xenon tube 401 shown in FIG. 3 is a light emitter, and is electrically connected by a lead wire 402 and wired to a strobe substrate 404 that performs light emission control via a flexible wiring substrate 403. The reflective shade 405 collects the light from the xenon tube 401. The xenon tube rubber 406 has a function of insulating the terminal portion of the xenon tube 401 and urging the xenon tube 401 toward the reflection shade 405. The prism panel 407 emits light from the xenon tube 401 and the reflection shade 405 to a desired photographing range. For this purpose, the prism panel 407 has an entrance surface and an exit surface. Light-emitting related parts such as the xenon tube 401, the prism panel 407, the xenon tube rubber 406, and the reflective shade 405 are incorporated in the strobe holder 408. The strobe holder 408 is lightly press-fitted with a shaft 410 that hooks one end of a toggle spring 409 for urging the light emitting unit 1 in the protruding direction and the storing direction with the strobe shaft 302 as a rotation center. The other end of the toggle spring 409 is hooked on a shaft 301 a provided in the strobe base 301. The base member 411 is a member for attaching the flexible wiring board 403, the strobe board 404, and the strobe condenser 412. The base member 411 is screwed to the strobe base 301 to constitute the light emitting unit 1.

  A lever-type detection switch (hereinafter referred to as a switch) 403a detects whether the light emitting unit 1 is in the protruding position or the storage position with respect to the imaging apparatus. The switch 403a is disposed in the hole 411a provided in the base member 411. The switch 403a is mounted on the flexible wiring board 403. When the protrusion 408a of the strobe holder 408 pushes the lever of the switch 403a, it is detected that the light emitting unit 1 is in the retracted state, and the imaging apparatus transitions to the non-light emitting state. When the protrusion 408a moves away from the lever of the switch 403a, it is detected that the light emitting unit 1 is in the protruding state, and the imaging device transitions to the light emitting state.

  FIG. 4 is a diagram for explaining the interlocking between the lens barrel and the light emitting unit. FIG. 4A shows a perspective view of the lens barrel in a state where the interlocking mechanism to the light emitting unit 1 is assembled to the lens barrel. A slider 37 having a function of a holding member for holding the light emitting unit 1 (for example, a strobe) is guided by a slider shaft 38 held by the lens barrel base 32 and supported so as to be movable in the optical axis direction. That is, the slider shaft 38 functions as a regulating member that regulates the movement of the slider 37 in the optical axis direction.

  FIG. 4B is a front view of the lens barrel shown in FIG. FIG. 4C is a cross-sectional view taken along line AA of the lens barrel shown in FIG. FIG. 4C shows a cross section of a portion that engages with the drive ring 30 that is a drive source of the slider 37. As shown in FIG. 4C, a movable non-elastic slider follower 39 is accommodated in a cylindrical guide portion orthogonal to the optical axis of the slider 37. In addition, a strobe cam 30 a that is a groove (first groove) is provided on the outer diameter side of the drive ring 30. The slider follower 39 is cam-engaged with the strobe cam 30a and functions as a follower that follows the strobe cam 30a in conjunction with the rotation of the drive ring 30. The compression spring 40 functions as a first urging member that urges the slider follower 39 that is cam-engaged with the strobe cam 30 a in a direction along the normal line of the outer peripheral surface of the drive ring 30. That is, the slider 37 is provided with a first urging member (compression spring 40) and a follower (slider follower 39), and the follower follows the first groove so that it follows the first groove. It functions as a movable member that moves.

  When the drive ring 30 rotates about the optical axis, the slider 37 that operates integrally with the slider follower 39 moves in the optical axis direction via the strobe follower 39 that is cam-engaged with the strobe cam 30a. As will be described with reference to FIG. 5, the light emitting unit 1 is switched between the housed state and the protruding state as the slider 37 moves. Accordingly, the state of the light emitting unit 1 is switched in conjunction with the rotation of the drive ring 30.

  FIG. 5 is a diagram for explaining switching of the state of the light emitting unit. FIG. 5A shows the storage state of the light emitting unit 1. The storage state is a state in which the light emitting unit 1 is stored. FIG. 5B shows a state where the slider 37 is in contact with the protrusion 408 b of the strobe holder 408. FIG. 5C shows a protruding state of the light emitting unit 1. The protruding state indicates a state where the light emitting unit 1 protrudes from the imaging device, that is, a state when the light emitting unit 1 is used. The light emitting unit 1 is stably supported in each of the storage state and the protrusion state by a toggle spring 409 whose urging direction is switched between the storage state and the protrusion state. That is, the toggle spring 409 functions as a second urging member that maintains the state of the light emitting unit 1 by urging the light emitting unit 1 in the protruding state and the housed state.

  As shown in FIG. 5A, the U-shaped portion 37a of the slider 37 is configured to sandwich a protrusion 408b protruding from the strobe holder 408 provided in the light emitting unit 1. The slider 37 transmits power for switching the state of the light emitting unit 1 against the urging force of the toggle spring 409 to the light emitting unit 1. Specifically, as the slider 37 moves in the optical axis direction Z, the projection 408b is pressed (see FIG. 5B), and the light emitting unit 1 exerts a rotational force around the strobe shaft 302. receive. This rotational force lifts the light emitting unit 1 against the biasing force of the toggle spring 409 and switches the biasing direction of the toggle spring 409. Thereby, as shown in FIG.5 (C), the light emission unit 1 changes to a protrusion state. When the light emitting unit 1 is changed from the protruding state to the retracted state, an operation opposite to the operation performed when the light emitting unit 1 is changed from the retracted state to the protruding state is performed.

  FIG. 6 is a diagram illustrating an operation example of the slider accompanying the operation of the imaging apparatus. FIG. 6A shows the outer peripheral portion of the drive ring 30. The SINK position, WIDE position, and TELE position shown in FIG. 6A are use positions of the imaging apparatus. The SINK position indicates a non-photographing state, that is, a state where the lens barrel is retracted. The WIDE position and the TELE position indicate the shooting state. The WIDE position corresponds to the wide state of the zoom lens mechanism included in the imaging apparatus. The TELE position corresponds to the tele state of the zoom lens mechanism provided in the imaging apparatus.

  FIG. 6B is a cross-sectional view around the strobe follower 39, the slider 37, and the drive ring 30 at the SINK position. FIG. 6C is a sectional view around the strobe follower 39, the slider 37, and the drive ring 30 in the WIDE position to the TELE position. When the power supply of the imaging apparatus is turned on and the drive ring 30 rotates in the direction α in FIG. 6A, the strobe follower 39 comes into contact with the cam surface 30aa of the drive ring 30 and the subject is integrated with the slider 37. Pressed to the side and starts moving. The state at this time corresponds to the state shown in FIG. When the strobe follower 39 is gradually moved and the urging direction of the toggle spring 409 (FIG. 3) is switched, the strobe follower 39 is pressed against the cam surface 30ab of the drive ring 30. The state at this time corresponds to the state shown in FIG. The strobe follower 39 further reaches the WIDE position by going up the inclined portion 30ad that smoothly connects the low cam bottom surface 30ac to the high cam bottom surface 30ae. At this time, the strobe follower 39 is pushed up in the normal direction of the outer peripheral surface of the drive ring 30 (in the direction of the central axis of the strobe follower 39) by compressing the compression spring 40 as shown in FIG. 6C. ing. Between the WIDE position and the TELE position, the cam bottom surface 30ae of the strobe cam 30a is kept at a constant height in order to eliminate the load fluctuation of the lens barrel drive, and the strobe follower 39 has the same load (drive of the compression spring 40). The TELE position is reached with a pressing force on the ring 30).

  When the power is turned off at the TELE position, the strobe follower 39 returns to the SINK position following a route reverse to the route followed when the power is turned on. When the power is turned off and the drive ring 30 rotates in the direction opposite to the α direction in FIG. 6A, the strobe follower 39 passes through the WIDE position with a constant load. The strobe follower 39 then moves down the inclined portion 30ad of the strobe cam 30a and comes into contact with the cam surface 30ab of the drive ring 30 and is pushed integrally with the slider 37 toward the imaging surface side to start moving. When the strobe follower 39 is gradually moved and the urging direction of the toggle spring 409 is switched, the strobe follower 39 is pressed against the cam surface 30aa of the drive ring 30 and finally reaches the SINK position. At this time, the strobe follower 39 is lowered in the normal direction of the outer peripheral surface of the drive ring 30 (in the direction of the central axis of the strobe follower 39) as shown in FIG. Will do. Between the WIDE position and the SINK position, a load for closing a barrier unit (not shown) provided in the lens barrel is applied as a load on the lens barrel. Therefore, according to the image pickup apparatus of the first embodiment, the load on the strobe follower 39 is reduced, so that the driving load on the entire lens barrel is reduced.

  In the imaging apparatus of Embodiment 1, the cam groove depth of the strobe cam 30a in the region from the WIDE position to the TELE position is shallower than the cam groove depth in the region from the SINK position to the WIDE position. That is, the strobe cam 30a has a first depth in the first region (region from the SINK position to the WIDE position) in the rotation direction of the drive ring 30, and the second region (from the WIDE position to the TELE position). In the region, the second depth is shallower than the first depth. Therefore, as shown in FIG. 6C, the groove 31 can be provided on the inner diameter side of the drive ring 30 from the strobe cam 30a without forming a through portion in the drive ring 30. If the cam groove depth is shallow, the amount of the strobe follower 39 that engages with the strobe cam 30a decreases. Can do. In the present embodiment, the slider 37 moves on the first area until the imaging device shifts from the non-shooting state to the shooting state. When the imaging device is in the shooting state, the slider 37 moves on the second area. To move.

  FIG. 7 is a diagram showing the positional relationship of grooves provided in the drive ring. In the present embodiment, a groove 31 is provided in the second area (area from the WIDE position to the TELE position), and a groove 31 is provided in the first area (area from the SINK position to the WIDE position). Not provided. FIG. 7A shows a cross section of the first region where the cam groove of the strobe cam 30a is deep. FIG. 7B shows a cross section of the second region where the cam groove is shallow. In FIG. 7A, the thickness of the drive ring 30a is t1, the amount of engagement of the strobe follower 39 is t2, and the amount of engagement of the drive pin 28 of the moving cam ring 19 is t3. The strobe follower 39 and the drive pin 28 overlap each other by a thickness t4. That is, in the present embodiment, in the first region, the positions of the strobe follower 39 and the drive pin 38 in the direction along the normal line of the outer peripheral surface of the drive ring 30 overlap each other. Specifically, the dimensional relationship is t1 <t2 + t3. Thereby, a sufficient amount of engagement can be taken within a limited thickness of t1.

  As shown in FIG. 7B, in the portion where the groove 31 is provided (second region), the cam pin is shallow and the amount of engagement of the strobe follower 39 is t5 (t5 <t2). The distance from the terminal 28 is set at t6. That is, in the second region, the positions of the strobe follower 39 and the drive pin 38 in the direction along the normal line of the outer peripheral surface of the drive ring 30 do not overlap each other. As a result, a sufficient amount of engagement is normally maintained within the thickness t2 of the drive ring 30, and the strobe follower 39 can be moved in the δ direction by shallowing the cam groove in the portion where the groove 31 is provided. As a result, the strobe cam 30a can be arranged without making a penetrating portion in the drive ring 30.

  In addition to changing from the high cam bottom surface 30ae of the strobe cam 30a to the low cam bottom surface 30ac between the SINK position and the WIDE position, the width of the strobe cam 30a may be increased. That is, the cam groove width of the strobe cam 30a in the first region (the region from the SINK position to the WIDE position) in the rotation direction of the drive ring 30 is the cam in the second region (the region from the WIDE position to the TELE position). You may make it become wider than the width | variety of a groove | channel. This is because the strobe follower 39 is lowered until it contacts the lower surface 30ac of the strobe cam 30a, thereby increasing the amount of engagement when receiving a large force from the strobe cam 30a to move the slider 37 in the optical axis direction. Because. As described above, in order to increase the amount of engagement of the strobe follower 39 and reduce the lens barrel load as much as possible, it is desirable to widen the width direction of the strobe cam 30a, but the height of the cam bottom of the strobe cam 30a is changed. There is no problem with the operation of the light emitting unit. The strobe follower 39 may be lowered to the cam bottom by increasing the cam groove width between the SINK and WIDE positions without changing the cam bottom height of the strobe cam 30a. Further, in this embodiment, the groove 31 provided on the inner side of the drive ring 30 is a rectilinear groove for transmitting rotation to the movable cam ring 19, but the groove 31 is not limited to the rectilinear groove, and has a concave shape. Any groove may be used.

  Hereinafter, an imaging apparatus according to the second embodiment will be described with reference to FIGS. 8 and 9. The imaging apparatus according to the second embodiment includes, for example, a finder and a zoomable strobe as external apparatuses. The interlocking between the drive ring 30 and the external device in the second embodiment is the same as the interlock between the drive ring 30 and the external device in the first embodiment. Also in the second embodiment, as in the first embodiment, the depth of the cam groove used for driving the external device changes according to the use position of the imaging device. In the second embodiment, as in the first embodiment, the width of the cam groove used for driving the external device may be changed according to the use position of the imaging device.

  FIG. 8 is a diagram for explaining the operations of the finder and the strobe included in the imaging apparatus. FIG. 8A shows the outer periphery of the drive ring 30 provided in the imaging device. FIG. 8B shows the outer periphery of the drive ring 30 when the use position of the imaging apparatus is the SINK position. FIG. 8C shows a state in which the power supply of the imaging apparatus is turned on, the drive ring 30 rotates in the β direction in FIG. 8A, and the use position of the imaging apparatus is the WIDE position. The TELE position (not shown) corresponds to a state in which the drive ring 30 is further rotated in the β direction from the WIDE position. At this TELE position, the viewfinder cams 30b and 30c are in a direction approaching each other.

  The viewfinder lenses 51 and 52 shown in FIG. 8B are members driven by the drive ring 30 among the members of the viewfinder. The viewfinder lenses 51 and 52 are movable members that move along the viewfinder cam when the corresponding cam follower follows the viewfinder cam (30b, 30c) in conjunction with the rotation of the drive ring 30.

  The strobe holder 54 is a holding member that holds the strobe. The strobe holder 54 is a movable member that is driven by the drive ring 30. Specifically, the strobe holder 54 moves along the strobe cam 30d when the corresponding cam follower (strobe follower 56) follows the strobe cam 30d in conjunction with the rotation of the drive ring 30. The finder lenses 51 and 52 and the strobe holder 54 are provided with a cam follower and a compression spring, respectively, in the same manner as the slider follower 39 and the compression spring 40 are applied to the slider 37 of the first embodiment. As a result, the viewfinder lenses 51 and 52 and the strobe holder 54 can advance and retreat in the direction of the central axis of the corresponding cam follower. Note that the compression spring of the strobe holder 54 is the compression spring 57 shown in FIG. The viewfinder lens 51 is formed integrally with a portion in which the corresponding cam follower and the compression spring are accommodated.

  A finder shaft 50 is passed through the finder lenses 51 and 52. Thereby, each finder lens can move only in the optical axis direction. Similarly, a strobe shaft 53 is passed through the strobe holder 54. Thereby, the strobe holder 54 can move only in the optical axis direction. The finder shaft 50, the strobe shaft 53, and the prism panel 55 are fixed to a base member (not shown), and the finder zoom is performed by the advance and retreat of the finder lenses 51 and 52, and the strobe zoom is performed by the advance and retreat of the strobe holder 54, respectively. A tension spring (not shown) is hung between the viewfinder lenses 51 and 52, and the strobe holder is urged toward the subject side to remove the backlash. Since the drive transmission from the power source of the drive ring 30 is the same as that of the first embodiment, the description thereof is omitted.

  As shown in FIG. 8A, the drive ring 30 is provided with a cam for driving the above-described finder lenses 51 and 52 and the strobe holder 54. A corresponding cam follower is engaged with the finder lens 51 in the finder lens 51, the finder lens 52 in the finder cam 30b, and the strobe holder 54 in the strobe cam 30d. Here, in the viewfinder cams 30c and 30b and the strobe cam 30d, the cam groove depth sequentially changes until the use position of the imaging device changes from the SINK position to the TELE position. Regarding the finder cam 30b, the cam surface 30ba, which is the cam surface from the SINK position to the WIDE position, has the same depth. The cam follower corresponding to the finder lens 52 is interlocked with the rotation of the drive ring 30, passes through the WIDE position, ascends the inclined portion 30 bb, and reaches the cam surface 30 bc that is a shallower cam surface than the cam surface 30 ba. When the cam follower further advances from the cam surface 30bc, the cam follower descends the inclined portion 30bd to reach the cam surface 30be, and proceeds to the TELE position at the same depth as it is. The cam surfaces of the finder cam 30c and the strobe cam 30d are also provided with a height difference similar to the height difference of the cam surface provided in the finder cam 30b described above. For example, the cam surface ca, the inclined portion cb, the cam surface cc, the inclined portion cd, and the cam surface ce provided on the finder cam 30c are respectively the cam surface ba, the inclined portion bb, the cam surface bc, the inclined portion bd, and the cam surface. Same as be. Further, the cam surface da, the inclined portion db, the cam surface dc, the inclined portion dd, and the cam surface de provided on the strobe cam 30d are respectively a cam surface ba, an inclined portion bb, a cam surface bc, an inclined portion bd, and a cam surface. Same as be.

  The drive ring 30 shown in FIG. 8B is provided with three grooves 31 for transmitting rotational power to the moving cam ring 19 provided in the imaging device, one of which is a finder cam 30b, 30c, The positional relationship intersects the strobe cam 30d. The groove 31 indicated by the dotted line in FIG. 8B passes through the cam surface 30bc, the cam surface 30cc, and the cam surface 30dc which are shallow cam surfaces. As a result, as shown in FIG. 9B, the follower (the strobe follower 56 in FIG. 9B) can be prevented from penetrating the drive ring 30. As a result, there is no risk of harmful light entering the inside of the lens barrel, and entry of sand dust or the like that has entered from the outside can be prevented.

  FIG. 9 is a diagram for explaining the operation of the strobe follower. The strobe follower 56 passes through the inclined portion 30db from the cam surface 30da in FIG. 8A in the state shown in FIG. 9A from the SINK position. As the cam becomes shallower, the strobe follower 56 is pushed up in the γ direction in FIG. 9B, and the strobe follower 56 reaches the cam surface 30dc while the compression spring 57 is compressed. The state at this time is the state shown in FIG. When the strobe follower 56 further advances, the cam groove becomes deeper at the inclined portion 30dd, and the compression spring is slightly released again at the cam surface de, resulting in the state of FIG. The operation of the cam follower corresponding to the viewfinder lenses 51 and 52 is the same as the operation of the strobe follower 56 described above.

  Further, between the SINK position and the WIDE position where the barrier opening / closing loads overlap, the relationship of the cam surface 30ba> the cam surface 30be, the cam surface 30ca> the cam surface 30ce, and the cam surface 30da> the cam surface 30de is satisfied. It is desirable to make it. Similarly to the first embodiment, the arrangement of each follower and the drive pin of the moving cam ring 19 can be overlapped in a portion where the groove 31 is not provided. Thereby, the stability of the operation of the finder or the strobe is maintained. As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

30 Drive ring 30a Strobe cam 31 Groove 37 Slider 39 Slider follower

Claims (7)

A first cylindrical member that rotates to drive the lens barrel;
A first groove provided on the outer diameter side of the first cylindrical member;
A follower that engages with the first groove and follows the first groove in conjunction with the rotation of the first cylindrical member;
A first urging member that urges the follower in a direction along a normal line of the outer peripheral surface of the first cylindrical member;
The first urging member and the follower are provided, and the follower follows the first groove so that the movable member moves along the first groove.
A regulating member that regulates movement of the movable member in the optical axis direction;
The first groove has a first depth in a first region in the rotation direction of the first cylindrical member, and a second depth shallower than the first depth in a second region. An imaging apparatus characterized by that. The imaging apparatus according to claim 1, wherein a width of the first groove portion in the first region is wider than a width of the first groove portion in the second region. On the inner diameter side of the first cylindrical member, a second cylindrical member that moves forward and backward in the optical axis direction and rotates about the optical axis by a rotational force transmitted from the first cylindrical member is provided. And
The second cylindrical member includes a protruding member that transmits a rotational force from the first cylindrical member,
The first cylindrical member includes a second groove portion with which the protruding member is engaged,
The first region is a region where the second groove is not provided, and the second region is a region where the second groove is provided. The imaging device according to claim 2. In the first region, the positions in the direction along the normal line of the outer peripheral surface of the first cylindrical member of the following portion and the protruding member overlap each other,
4. The imaging according to claim 3, wherein in the second region, positions of the follower and the projecting member in a direction along a normal line of an outer peripheral surface of the first cylindrical member do not overlap each other. apparatus. A light emitting unit that rotates to change the state from the storage state to the protruding state, or from the protruding state to the storage state;
A second urging member for maintaining the state of the light emitting unit by urging the light emitting unit in the protruding state and the housed state;
The movable member transmits power for switching the state of the light emitting unit against the urging force of the second urging member to the light emitting unit,
The first area is an area in which the movable member moves until the imaging apparatus transitions from a non-imaging state to an imaging state, and the second area is a case where the imaging apparatus is in an imaging state. The imaging apparatus according to claim 1, wherein the movable member is a region where the movable member moves. The imaging device according to any one of claims 1 to 4, wherein the movable member is a finder lens. The imaging apparatus according to claim 1, wherein the movable member is a holding member that holds a strobe.

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