Optical apparatus

Abstract

To provide an optical apparatus which can prevent the quality from being degraded without requiring increase of the number of components or space.SOLUTION: An optical apparatus includes: an optical member; a holding member configured to hold the optical member and to be movable in a direction including a component perpendicular to an optical axis; a first cylindrical member having an opening shape; a second cylindrical member movable relative to the first cylindrical member; and a first convex shape arranged along the circumferential direction of the second cylindrical member. The optical apparatus is configured such that, by relative movement of the second cylindrical member with respect to the first cylindrical member, a state can be achieved in which at least a part of the first convex shape overlaps the opening shape when viewed from the direction orthogonal to the optical axis.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to optical instruments. [Background technology]

[0002] Conventionally, optical devices have been known to have a configuration in which an image blur caused by camera shake or the like is suppressed by translating an image stabilization lens in a direction perpendicular to the optical axis. If the image stabilization lens were to move freely within the same movable range as when shooting, when not shooting, it could cause a loss of image quality due to noise when it hits something. Patent Document 1 discloses a configuration in which a locking mechanism holds the image stabilization lens near the center of the optical axis of the optical device when not shooting, in order to prevent a loss of image quality. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-124809 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the configuration of Patent Document 1 requires the addition of a locking mechanism to hold the shake correction lens near the center of the optical axis, which leads to an increase in the number of parts and an increase in size due to the need to secure space for arranging the parts.

[0005] An object of the present invention is to provide an optical device that does not increase the number of parts or require space, and that does not impair quality. [Means for solving the problem]

[0006] An optical device according to one aspect of the present invention comprises an optical element, a holding member that holds the optical element and is movable in a direction that includes a component perpendicular to the optical axis, a first cylindrical member having an opening shape, a second cylindrical member that is movable relative to the first cylindrical member, and a first convex shape that is arranged along the circumferential direction of the second cylindrical member, and is characterized in that, as the second cylindrical member moves relative to the first cylindrical member, at least a portion of the first convex shape can be changed to overlap with the opening shape when viewed from a direction perpendicular to the optical axis. [Effects of the Invention]

[0007] The present invention aims to provide an optical device that does not increase the number of parts or require space, and that does not impair quality. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an external view of a camera system according to a first embodiment. [Figure 2] FIG. 1 is a block diagram of a camera system according to a first embodiment. [Figure 3] FIG. 2 is a cross-sectional view of the camera system when the interchangeable lens of the first embodiment is in a retracted state. [Figure 4] 1 is a cross-sectional view of a camera system in which an interchangeable lens of a first embodiment is in an extended state; [Figure 5] FIG. 2 is an exploded perspective view of the shake correction device, the guide barrel, and the cam barrel of the first embodiment. [Figure 6] FIG. 2 is a front view of the shake correction device, guide barrel, and cam barrel of the first embodiment in a photographing state. [Figure 7] 2 is a front view of the shake correction device, guide barrel, and cam barrel of the first embodiment in a non-photographing state. FIG. [Figure 8] 3 is a cross-sectional view of the main parts of the shake correction device, the guide barrel, and the cam barrel of the first embodiment in a non-photographing state. FIG. [Figure 9] FIG. 10 is an exploded perspective view of a shake correction device, a guide barrel, and a cam barrel according to a second embodiment. [Figure 10] FIG. 10 is a front view of the shake correction device, guide barrel, and cam barrel in a photographing state according to the second embodiment. [Figure 11] FIG. 10 is a front view of the shake correction device, guide barrel, and cam barrel of the second embodiment in a non-photographing state. [Figure 12] FIG. 10 is a cross-sectional view of the main parts of the shake correction device, guide barrel, and cam barrel of the second embodiment in a non-photographing state. [Figure 13] FIG. 11 is an exploded perspective view of a shake correction device, a guide barrel, and a cam barrel according to a third embodiment. [Figure 14] FIG. 11 is a front view of the shake correction device, guide barrel, and cam barrel in a photographing state according to a third embodiment. [Figure 15] FIG. 11 is a front view of the shake correction device, guide barrel, and cam barrel of the third embodiment in a non-photographing state. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same components, and redundant explanations will be omitted. [Example]

[0010] Fig. 1 is an external view of a camera system according to this embodiment. Fig. 1(a) and Fig. 1(b) are views of the camera system as seen from the front and rear, respectively. The camera system has an interchangeable lens (optical device) 101 and a digital camera (hereinafter referred to as camera body) 1 to which the interchangeable lens 101 is detachably attached. Note that, although an interchangeable lens will be described as an example of an optical device in this embodiment, other devices such as a digital camera or video camera may also be used.

[0011] As shown in FIG. 1(a), the optical axis direction along which the optical axis of the imaging optical system housed in the interchangeable lens 101 extends is referred to as the X-axis direction, and the directions perpendicular to the X-axis direction are referred to as the Z-axis direction (horizontal direction) and the Y-axis direction (vertical direction). Hereinafter, the Z-axis direction and the Y-axis direction will also be collectively referred to as the Z / Y-axis direction. Furthermore, the rotation direction around the Z axis will be referred to as the pitch direction, and the rotation direction around the Y axis will be referred to as the yaw direction. The pitch direction and yaw direction (hereinafter collectively referred to as the pitch / yaw direction) are the directions of rotation around two axes, the Z axis and the Y axis, which are perpendicular to each other.

[0012] A grip section 2 for a user to hold the camera body 1 in his / her hand is provided on the left side of the camera body 1 when viewed from the front (the subject side) (right side when viewed from the rear).

[0013] A power operation unit 3 is located on the top surface of the camera body 1. When the user turns on the power operation unit 3 while the camera body 1 is in the power-off state, the camera body 1 turns on and becomes capable of capturing images. When the user turns off the power operation unit 3 while the camera body 1 is in the power-on state, the camera body 1 turns off.

[0014] The top surface of the camera body 1 is also provided with a mode dial 4, a release button 5, and an accessory shoe 6. The user can switch between imaging modes by rotating the mode dial 4. The imaging modes include a manual still image capture mode, in which the user can freely set imaging conditions such as shutter speed and aperture value; an auto still image capture mode, in which the camera automatically obtains the appropriate exposure; and a video capture mode for capturing video. The user can half-press the release button 5 to initiate imaging preparation operations such as autofocus and autoexposure control, or fully press the button to initiate imaging. Accessories such as an external flash and an external viewfinder (EVF), not shown, can be detachably attached to the accessory shoe 6. The camera body 1 also includes an image sensor that photoelectrically converts (captures) a subject image formed by the imaging optical system in the interchangeable lens 101.

[0015] The interchangeable lens 101 is mechanically and electrically connected to the camera mount 7 provided on the camera body 1 via the lens mount 102. As described above, the interchangeable lens 101 houses an imaging optical system that forms an image of a subject using light from the subject. The outer periphery of the interchangeable lens 101 is provided with a zoom ring 103 that can be rotated around the optical axis by user operation. The outer periphery of the zoom ring 103 is knurled to prevent the user's hand from slipping when operating it. When the user rotates the zoom ring 103, the zoom group that makes up the imaging optical system moves to a predetermined optical position that corresponds to the angle of the zoom ring 103. This configuration allows the user to take pictures at a desired angle of view.

[0016] As shown in FIG. 1(b), the rear surface of the camera body 1 is provided with a rear operation unit 8 and a display unit 9. The rear operation unit 8 includes a plurality of buttons and dials to which various functions are assigned. When the camera body 1 is powered on and the still image capture mode or video capture mode is set, the display unit 9 displays a through image of the subject image captured by the image sensor. The display unit 9 also displays imaging parameters indicating imaging conditions such as shutter speed and aperture value, and the user can change the settings of the imaging parameters by operating the rear operation unit 8 while viewing the display. The rear operation unit 8 includes a playback button for instructing playback of a recorded captured image. When the user operates the playback button, the captured image is played back and displayed on the display unit 9.

[0017] FIG. 2 is a block diagram showing the electrical and optical configuration of the camera system. The camera body 1 includes a power supply unit 10 that supplies power to the camera body 1 and the interchangeable lens 101, and an operation unit 11 that includes a power operation unit 3, a mode dial 4, a release button 5, a rear operation unit 8, and a touch panel function of the display unit 9. The entire camera system is controlled by a camera control unit 12 provided in the camera body 1 and a lens control unit 104 provided in the interchangeable lens 101, which communicate with each other. The camera control unit 12 reads and executes a computer program stored in a memory unit 13. In this case, the camera control unit 12 communicates various control signals, data, and the like with the lens control unit 104 via a communication terminal of an electrical contact 105 provided in the lens mount 102. The electrical contact 105 includes a power terminal that supplies power from the power supply unit 10 to the interchangeable lens 101.

[0018] The imaging optical system of the interchangeable lens 101 is equipped with a zoom group 200 that is connected to the zoom operation ring 103 and moves in the optical axis direction to change the angle of view, and a lens vibration reduction group 301 that includes a shift lens as an image stabilization element that reduces image blur. The lens vibration reduction group 301 performs vibration reduction operation to reduce image blur by moving (shifting) the shift lens in directions that include components in the Z and Y axes that are orthogonal to the optical axis. The imaging optical system also includes an aperture group 401 that adjusts the amount of light, and a focus group 501 that includes a focus lens that moves in the optical axis direction to adjust the focus. The interchangeable lens 101 has an image stabilization driver 302 that drives the lens vibration reduction group 301 to shift the shift lens, an aperture driver 402 that drives the aperture group 401, and a focus driver 502 that drives the focus group 501 to move the focus lens.

[0019] The camera body 1 has a shutter unit 14, a shutter driver 15, an image sensor 16, an image processor 17, and a camera controller 12. The shutter unit 14 controls the amount of light collected by the imaging optical system in the interchangeable lens 101 and exposed to the image sensor 16. The image sensor 16 photoelectrically converts the subject image formed by the imaging optical system and outputs an image signal. The image processor 17 performs various image processes on the image signal and then generates an image signal. The display 9 displays the image signal (through image) output from the image processor 17, displays imaging parameters, and plays back and displays captured images recorded in the memory unit 13 or a recording medium (not shown).

[0020] The camera control unit 12 controls the driving of the aperture group 401 and the shutter unit 14 via the aperture drive unit 402 and the shutter drive unit 15 in accordance with the setting values of the aperture value and shutter speed received from the operation unit 11. The camera control unit 12 also controls the driving of the focus group 501 in accordance with an image capture preparation operation (half-press operation) on the operation unit 11 (release button 5). For example, when an autofocus operation is instructed, the focus detection unit 18 determines the focus state of the subject image formed by the image sensor 16 based on the image signal generated by the image processing unit 17, generates a focus signal, and sends it to the camera control unit 12. At the same time, the focus drive unit 502 detects the current position of the focus group 501 and sends the detection signal to the camera control unit 12 via the lens control unit 104. The camera control unit 12 compares the focus state of the subject image with the current position of the focus group 501, calculates the focus drive amount from the amount of deviation, and sends it to the lens control unit 104. The lens control unit 104 controls the drive of the focus group 501 to a target position via the focus drive unit 502, and corrects the focus deviation of the subject image.

[0021] Furthermore, when an automatic exposure control operation is instructed, the camera control unit 12 receives a luminance signal generated by the image processing unit 17 and performs a photometric calculation. Based on the photometric calculation result, the camera control unit 12 controls the drive of the aperture group 401 in response to an image capture instruction operation (full press operation) on the operation unit 11 (release button 5). The camera control unit 12 also controls the drive of the shutter unit 14 via the shutter drive unit 15, and performs exposure processing by the image sensor 16.

[0022] The camera body 1 has a pitch shake detection unit 19 and a yaw shake detection unit 20 as shake detection means capable of detecting image shake such as that caused by a user's hand shake. The pitch shake detection unit 19 and the yaw shake detection unit 20 each use an angular velocity sensor (vibration gyro) and an angular acceleration sensor to detect image shake in the pitch direction (rotation direction around the Z axis) and the yaw direction (rotation direction around the Y axis), and output a shake signal. The camera control unit 12 calculates the shift position of the lens vibration isolation group 301 (shift lens) in the Y axis direction using the shake signal from the pitch shake detection unit 19. Similarly, the camera control unit 12 calculates the shift position of the lens vibration isolation group 301 in the Z axis direction using the shake signal from the yaw shake detection unit 20. Then, the camera control unit 12 controls the drive of the lens vibration isolation group 301 to a target position according to the calculated shift positions in the pitch and yaw directions, and performs vibration isolation operation to reduce image shake during exposure and live view image display.

[0023] The interchangeable lens 101 has a zoom ring 103 for changing the angle of view of the imaging optical system, and a zoom detection unit 106 for detecting the angle of the zoom ring 103. The zoom detection unit 106 is configured using, for example, a resistive linear potentiometer, and detects the angle of the zoom ring 103 operated by the user as an absolute value. Information about the angle of view detected by the zoom detection unit 106 is sent to the lens control unit 104 and reflected in various controls by the camera control unit 12. Some of the information about the various controls is recorded in the memory unit 13 or a recording medium together with the captured image.

[0024] The positional relationship between the interchangeable lens 101 and the components of the camera body 1 will be described below with reference to Figures 3 and 4. Figures 3 and 4 are cross-sectional views on the XY plane including the optical axis of the camera system when the interchangeable lens 101 is in the retracted and extended zoom states, respectively. The center line shown here roughly coincides with the optical axis determined by the imaging optical system, and therefore will be hereinafter referred to as the optical axis.

[0025] In this embodiment, a six-group configuration is adopted as an example of an imaging optical system. The zoom group 200, which has moved to a predetermined optical position corresponding to the angle of view, forms an image of the subject on the imaging surface of the image sensor 16 using light from the subject. In this case, the lens vibration reduction group 301 and the aperture group 401 function as a third zoom group, and the focus group 501 functions as a fifth zoom group. The imaging optical system also includes a first zoom group 201, a second zoom group 202, a fourth zoom group 204, and a sixth zoom group 206. Note that the present invention does not limit the configuration of the lens groups; for example, the lens vibration reduction group 301 or the focus group 501 may function as the second zoom group. Furthermore, some lens groups may be fixed rather than movable.

[0026] The linear guide barrel (first barrel member) 107 is fixed to the lens mount 102 via a fixed barrel (not shown). Bayonet claws (not shown) are arranged at equal intervals on the outer peripheral surface of the linear guide barrel 107. Meanwhile, a circumferential groove (not shown) is provided on the inner peripheral surface of the cam barrel (second barrel member) 108. The cam barrel 108 is also connected to the zoom operation ring 103. When the zoom operation ring 103 is rotated, the cam barrel 108 rotates about the optical axis due to the engagement between the bayonet claws and the circumferential groove.

[0027] The linear guide barrel 107 is formed with linear guide grooves that restrict the movement of each zoom group in the rotational direction and guide their linear movement in the optical axis direction. The cam barrel 108 is also formed with cam grooves that correspond to each zoom group and have loci with different angles in the rotational direction. Cam followers are provided for each of the first through sixth zoom groups, and each cam follower engages with its corresponding linear guide groove and cam groove. When the user rotates the zoom operation ring 103, the cam barrel 108 rotates, and the cam followers engage with the linear guide grooves and cam grooves, simultaneously moving each zoom group forward and backward in the optical axis direction.

[0028] Fig. 5 is an exploded perspective view of the shake correction device 600, the linear guide barrel 107, and the cam barrel 108 of this embodiment. Fig. 6 and Fig. 7 are front views of the shake correction device 600, the linear guide barrel 107, and the cam barrel 108 in the imaging state and the non-imaging state, respectively.

[0029] The image stabilization device 600 includes a lens frame (holding member) 602 that holds a shift lens (optical member) 601 , and a base member 603 .

[0030] The lens frame 602 is provided with three receiving surfaces that respectively come into contact with the three rolling members 607, and three spring hooks (holding portions) 602a that hold one end of each of three springs (second biasing members) 608 that bias in the optical axis direction. The spring hooks 602a are arranged at the same circumferential position (in the same phase) as the opening shape 107a, which will be described later. Note that "in the same position" also includes cases where the positions are substantially the same position (approximately in the same phase). An outer edge 602f of the spring hooks 602a is configured to be the outermost portion of the lens frame 602. The lens frame 602 is also provided with a pair of magnets 609 that are arranged circumferentially spaced approximately 90° apart from each other in a plane perpendicular to the optical axis.

[0031] The base member 603 is provided with three receiving surfaces that respectively come into contact with the three rolling members 607, and three spring hooks 603a that hold the other ends of the three springs 608. Due to the biasing force of the springs 608 in the optical axis direction, the rolling members 607 are housed between receiving surfaces provided on the lens frame 602 and base member 603 so as to be able to roll within a plane perpendicular to the optical axis while being sandwiched between these receiving surfaces. The base member 603 is also provided with a pair of coils 610 that are arranged in phase with the pair of magnets 609.

[0032] By passing current through the pair of coils 610, a Lorentz force is generated between the pair of magnets 609. Due to the Lorentz force, the lens frame 602 is supported movably with respect to the base member 603 within a plane parallel to a direction including a component perpendicular to the optical axis, within a range in which the mechanical end abuts against the mechanical end of the base member 603.

[0033] The linear guide barrel 107 is provided with openings 107a. In this embodiment, the openings 107a are vertical grooves that guide the zoom group in the optical axis direction, and are arranged at equal intervals in three phases. The linear guide barrel 107 is also provided with a circumferential groove 107b along the circumferential direction. The cam barrel 108 is provided with a convex shape (first convex shape) 108b that protrudes toward the optical axis in a plane substantially perpendicular to the optical axis. The convex shape 108 is arranged rotatably while engaging with the circumferential groove 107b of the linear guide barrel 107 in the optical axis direction, and restricts relative movement between the linear guide barrel 107 and the cam barrel 108 in the optical axis direction.

[0034] 3 and 4, the cam barrel 108 rotates relative to the linear guide barrel 107, causing the zoom group to move forward and backward. The non-photographing state is achieved by rotating the cam barrel 108 further than the wide-angle end. In the non-photographing state, the convex shape 108b on the cam barrel 108 can move to an area that extends beyond the opening shape 107a on the linear guide barrel 107. That is, the convex shape 108b can change to a state where at least a portion of the convex shape 108b overlaps with the opening shape 107a when viewed from a direction perpendicular to the optical axis. In this state, the distance between the convex shape 108b and the outer edge 602f of the lens frame 602 becomes narrower.

[0035] FIG. 8 is a cross-sectional view of essential parts of the image stabilization device 600, the linear guide barrel 107, and the cam barrel 108 in a non-photographing state, with the circumferential groove shape 107b of the linear guide barrel 107 and the convex shape 108b of the cam barrel 108 in a sliding position. By rotating the cam barrel 108 to the non-photographing region, relative to the wide-angle end to the telephoto end, the convex shape 108b moves to the position of the opening shape 107a. In this way, by moving the cam barrel 108 to a non-photographing position relative to the linear guide barrel 107, the convex shape 108b comes into close proximity with the outer edge 602f of the lens frame 602, which is disposed on the inner diameter of the linear guide barrel 107. In other words, in the non-photographing state, regardless of whether the image stabilization device 600 itself moves in the optical axis direction, the range in which the lens frame 602 can move in a direction including a component perpendicular to the optical axis is more limited than in the photographing state. This reduces the impact noise of the image stabilization device 600 when not taking a picture, thereby preventing loss of quality. [Example]

[0036] The basic configuration of the camera system of this embodiment is the same as that of the camera system of embodiment 1. In this embodiment, only the configuration that differs from embodiment 1 will be described, and a description of the common configuration will be omitted.

[0037] Fig. 9 is an exploded perspective view of the shake correction device 600, the linear guide barrel 107, and the cam barrel 108 of this embodiment. Fig. 10 and Fig. 11 are front views of the shake correction device 600, the linear guide barrel 107, and the cam barrel 108 in the imaging state and the non-imaging state, respectively.

[0038] This embodiment differs from the first embodiment in that a biasing member (first biasing member) 604 that biases the linear guide barrel 107 and the cam barrel 108 in a direction perpendicular to the optical axis is disposed between the linear guide barrel 107 and the cam barrel 108. The biasing member 604 is disposed in a recess 108c provided in the cam barrel 108, and moves relative to the linear guide barrel 107 in response to the rotational movement of the cam barrel 108. The biasing member 604 functions as a first convex shape.

[0039] In shooting states from the wide-angle end to the telephoto end, the urging member 604 continues to urge the linear guide barrel 107 and the cam barrel 108. In a non-shooting state, by rotating the cam barrel 108, the urging member 604 moves to the position of the opening shape 107a provided in the linear guide barrel 107. As a result, the gap between the urging member 604 and the outer edge 602f of the lens frame 602 becomes narrower.

[0040] FIG. 12 is a cross-sectional view of the essential parts of the image stabilizer 600, the linear guide barrel 107, and the cam barrel 108 in the non-photographing state, at a position along the optical axis where the biasing member 604 is positioned. By rotating the cam barrel 108 to the non-photographing region, which covers a range from the wide-angle end to the telephoto end, the biasing member 604 positioned in the recess 108c moves to the position of the opening 107a. By moving the cam barrel 108 to the non-photographing position relative to the linear guide barrel 107, the biasing member 604 positioned in the recess 108c approaches the outer edge 602f of the lens frame 602 positioned on the inner diameter of the linear guide barrel 107. In other words, when viewed from a direction perpendicular to the optical axis, at least a portion of the biasing member 604 can be changed to overlap the opening 107a. In this state, the range of movement of the lens frame 602 in the direction perpendicular to the optical axis in the non-photographing state is more limited than in the photographing state.

[0041] The biasing member 604 can have spring properties, and using such a configuration allows the biasing member 604 and the lens frame 602 to abut against each other in the non-photographing state. In other words, it is possible to hold the lens frame 602 in the non-photographing state so that it cannot move within a plane parallel to a direction that includes a component perpendicular to the optical axis. This makes it possible to further reduce the impact noise of the image stabilization device 600 in the non-photographing state, thereby preventing any loss of quality.

[0042] Here, a convex shape (second convex shape) 107g, which is an irregular shape, is provided near the opening shape 107a. As a result, when the biasing member 604 moves to the position of the opening shape 107a in response to the rotational movement of the cam barrel 108, it comes into contact with the convex shape 107g and then overcomes the convex shape 107g. At this time, the biasing member 604, which has spring properties, overcomes the convex shape 107g, providing a clicking sensation to the user. In other words, the user can intuitively know that the camera is in the non-photographing state. With this configuration, it is possible to provide a clicking sensation indicating that the camera is in the non-photographing state while limiting the movement range of the lens frame 602 without providing any additional components. Note that while the case where the convex shape 107a is provided near the opening shape 107a has been described, other shapes may also be provided. [Example]

[0043] The basic configuration of the camera system of this embodiment is the same as that of the camera system of embodiment 1. In this embodiment, only the configuration that differs from embodiment 1 will be described, and a description of the common configuration will be omitted.

[0044] Fig. 13 is an exploded perspective view of the shake correction device 700, the linear guide barrel 107, and the cam barrel 108 of this embodiment. Fig. 14 and Fig. 15 are front views of the shake correction device 700, the linear guide barrel 107, and the cam barrel 108 in the imaging state and the non-imaging state, respectively.

[0045] In this embodiment, in order to configure the shift lens 601 so that it can be retracted in a direction perpendicular to the optical axis, there are provided a lens frame (first holding portion) 702, a base member 703, a shift member (second holding portion) 704, a torsion spring 705 which is a biasing member, and a retraction lever 706. In this embodiment, the lens frame 702 and the shift member 704 function as holding members.

[0046] During shake correction, the lens frame 702 moves integrally with the shift member 704 within a plane parallel to a direction including a component perpendicular to the optical axis. The lens frame 702 is supported rotatably between an imaging position (first position) located within the imaging optical path and a retracted position (second position) retracted from the imaging optical path by a bearing of the shift member 704 via a rotation axis parallel to the optical axis that is press-fitted into the base member 703.

[0047] The torsion spring 705 is fitted onto the base member 703 and biases the lens frame 702 in a direction that moves the lens frame 702 relative to the shift member 704 from the retracted position to the shooting position.

[0048] The retraction lever 706 is provided on the outer periphery of the base member 703. When the cam barrel 108 moves to the non-photographing state, a portion of the retraction lever 706 abuts against a feature (not shown) provided on the cam barrel 108, causing the retraction lever 706 to rotate on the base member 703. At this time, a tip 706a of the retraction lever 706 presses against the lens frame 702. As a result, the lens frame 702 pushes back against the spring force of the torsion spring 705 and retracts to the retracted position. At this time, the acting force of the torsion spring 705 also generates a biasing force on the shift member 704 that holds the lens frame 702. In this state, the convex shape 108b provided on the cam barrel 108 moves to the position of the opening shape 107a provided on the linear guide barrel 107 and comes close to the outer edge 704f of the shift member 704. Here, when the outer end 704f and the convex shape 108b come into contact, the shift member 704 comes into contact with the retraction lever 706, generating a biasing force, allowing them to come into contact with each other in the non-photographing state. In other words, in the non-photographing state, the shift member 704 can be held immovable within a plane parallel to a direction including a component perpendicular to the optical axis. This makes it possible to further reduce the impact noise of the image stabilization device 700 in the non-photographing state, thereby preventing any loss of quality.

[0049] The disclosure of this embodiment includes the following configuration. (Configuration 1) an optical member; a holding member that holds the optical member and is movable in a direction including a component perpendicular to the optical axis; a first cylindrical member having an opening shape; a second cylindrical member that is movable relative to the first cylindrical member; a first convex shape disposed along the circumferential direction of the second cylindrical member, The optical device is characterized in that, by moving the second cylindrical member relative to the first cylindrical member, at least a portion of the first convex shape can be changed to overlap the opening shape when viewed from a direction perpendicular to the optical axis. (Configuration 2) The optical device according to configuration 1, wherein the distance between the holding member and the first convex shape in a direction perpendicular to the optical axis in a non-photographing state is shorter than the distance in a photographing state. (Configuration 3) 3. The optical device according to claim 1, wherein the first convex shape restricts relative movement of the first barrel member and the second barrel member in the optical axis direction. (Configuration 4) The optical device described in any one of configurations 1 to 3, wherein the first convex shape is a first biasing member that biases the first cylindrical member and the second cylindrical member in a direction perpendicular to the optical axis. (Configuration 5) the first cylindrical member has a second convex shape in the vicinity of the opening shape, The optical device according to configuration 4, wherein the first convex shape comes into contact with the second convex shape when the first convex shape changes to a state where at least a portion of the first convex shape overlaps with the opening shape. (Configuration 6) further comprising a zoom group; 6. The optical apparatus according to any one of configurations 1 to 5, wherein the aperture shape guides movement of the zoom group along the optical axis. (Configuration 7) the holding member includes a holding portion that holds a second biasing member that biases in the optical axis direction, 7. The optical device according to claim 1, wherein the holding portion is disposed at the same position as the opening shape in the circumferential direction. (Configuration 8) 8. The optical device according to claim 1, wherein the holding member comprises a first holding portion that holds the optical element, and a second holding portion that holds the holding portion movably between a first position located within the imaging optical path in a plane perpendicular to the optical axis and a second position retracted from the imaging optical path.

[0050] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0051] 101 Interchangeable lenses (optical equipment) 107 Straight guide tube (first tube member) 107a Opening shape 108 Cam barrel (second barrel member) 108b Convex shape (first convex shape) 601 Shift lens (optical component) 602 Lens frame (holding member) 604 Urging member (first convex shape) 702 Lens frame (holding member)

Claims

1. an optical member; a holding member that holds the optical member and is movable in a direction including a component perpendicular to the optical axis; a first cylindrical member having an opening shape; a second cylindrical member that is movable relative to the first cylindrical member; a first convex shape disposed along the circumferential direction of the second cylindrical member, The optical device is characterized in that, by moving the second cylindrical member relative to the first cylindrical member, at least a portion of the first convex shape can be changed to overlap the opening shape when viewed from a direction perpendicular to the optical axis.

2. 2. The optical device according to claim 1, wherein a distance between the holding member and the first convex portion in a direction perpendicular to the optical axis in a non-photographing state is shorter than the distance in a photographing state.

3. 3. The optical device according to claim 1, wherein the first convex shape restricts relative movement of the first barrel member and the second barrel member in the optical axis direction.

4. 3. The optical device according to claim 1, wherein the first convex shape is a first biasing member that biases the first cylindrical member and the second cylindrical member in a direction perpendicular to the optical axis.

5. the first cylindrical member has a second convex shape in the vicinity of the opening shape, The optical device according to claim 4 , wherein the first convex shape comes into contact with the second convex shape when the first convex shape changes to a state where at least a portion of the first convex shape overlaps the opening shape.

6. further comprising a zoom group; 3. The optical device according to claim 1, wherein the aperture shape guides movement of the zoom group along the optical axis.

7. the holding member includes a holding portion that holds a second biasing member that biases in the optical axis direction, The optical device according to claim 1 , wherein the holding portion is disposed at the same position as the opening shape in the circumferential direction.

8. 3. The optical device according to claim 1, wherein the holding member comprises a first holding portion that holds the optical element, and a second holding portion that holds the holding portion movably between a first position located within the imaging optical path and a second position retracted from the imaging optical path.

Images