Lens barrel, and imaging apparatus

Abstract

To provide a lens barrel that, with a simple configuration, can reduce the total length of the lens barrel.SOLUTION: A lens barrel allows, according to an operation of an operating part, insertion and withdrawal of a movable member to an insertion position where the central axis of a lens held by the movable member is located on an optical axis, and a retreat position where the central axis of the lens is retreated from the optical axis. The lens barrel has an operating force transmission mechanism that transmits an operating force of the operating part to the movable member. The movable member has a first rotation axis having an axis parallel to the optical axis for rotating between the insertion position and the retreat position. When seen from a direction along the optical axis, the operating force transmission mechanism and the first rotation axis do not overlap each other at least between the insertion position and the retreat position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lens barrel and an imaging device. [Background technology]

[0002] Conventionally, extenders have been used in lens barrels for optical devices such as digital cameras as a means of changing the focal length to enable telephoto shooting depending on the shooting scene. These extenders are attached between the camera body and the master lens, and some extend the focal length by, for example, 1.4x or 2.0x. However, extenders that are detachable from the master lens can be troublesome to attach and detach, and can also be susceptible to dust and other particles entering the lens during attachment and detachment. To address this issue, some lens barrels incorporate extenders into the lens barrel, eliminating the need for such attachment and detachment and the risk of dust and particles entering the lens during attachment and detachment. When an extender is incorporated into such a lens barrel, the photographer must insert and remove the extender to move the center axis of the extender's magnification optical system between a position on the optical axis and a position away from the optical axis. Considering convenience during photography, it is desirable for the photographer to be able to insert and remove the extender more easily and conveniently.

[0003] In Patent Document 1, when the photographer grips the camera with his or her right hand, there is an operating section for inserting or removing the extender where the fingers of the right hand can be extended. This allows the photographer to insert or remove the extender with just their right hand while supporting the lens barrel with their left hand. This allows the photographer to change the focal length to suit the shooting scene while concentrating on shooting.

[0004] The extender insertion / removal mechanism in Patent Document 1 includes a mechanism for rotating the movable part between a position where the central axis of the magnifying optical system of the extender held by the movable part is on the optical axis and a position where it is retracted from the optical axis. It also includes an operating part that is operated by the photographer to rotate the movable part. The movable part rotates around a rotation axis A4, and the photographer's operating force is transmitted to the movable part via a gear train that serves as an operating force transmission means. When the photographer operates the movable part to either a position where the central axis of the magnifying optical system of the extender is on the optical axis or a position where it is retracted from the optical axis, the magnifying optical system of the extender must be held in that position. Therefore, Patent Document 1 includes an elastic member that biases the movable part and has one end fixed to at least a portion of the movable part located outside the outer periphery of the lens. When the central axis of the magnifying optical system of the extender is positioned closer to the optical axis than a predetermined position between the position where it is on the optical axis and the retracted position, the elastic member biases the movable part toward the position where it is on the optical axis. The optical system further includes a mechanism that, when the movable portion is at a position away from the optical axis from a predetermined position, urges the movable portion toward the position away from the optical axis. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2019 / 131186 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned Patent Document 1, when the central axis of the magnifying optical system of the extender moves between a position on the optical axis and a retracted position, the elastic member moves so that the direction of the moment acting on the movable member around the rotation axis A4 of the movable member reverses. Both ends of a spring member, which is an elastic member, are fixed to a first mounting portion on the movable member side and a second mounting portion on the inner tube side. When the movable member is in the position on the optical axis, the tension of the spring member pulls the movable member together, and a moment acts to urge the movable member toward the position on the optical axis, thereby holding it in place. Then, as the movable member moves from the position on the optical axis to the retracted position, the spring member overlaps with the rotation axis A4 of the movable member when viewed perpendicular to the optical axis. Then, when the spring member passes the rotation axis A4 of the movable member, a moment acts to urge the movable member away from the optical axis toward the retracted position, thereby holding it in place. In other words, this configuration necessarily disposes the rotation axis A4 of the movable member and the spring member at positions offset in the optical axis direction, requiring placement space in the optical axis direction, which places restrictions on the layout of the components and can be an obstacle to shortening the overall length of the lens barrel.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a lens barrel that has a simple structure and allows the overall length of the lens barrel to be shortened. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the present invention provides a lens barrel that allows a movable member to be inserted or removed between an insertion position where the center axis of a lens held by a movable member is positioned on the optical axis and a retracted position where the center axis of the lens is retracted from the optical axis in response to operation of an operating unit, and is characterized in that it has an operating force transmission mechanism that transmits the operating force of the operating unit to the movable member, and the movable member has a first rotation axis having an axis parallel to the optical axis for rotating between the insertion position and the retracted position, and the operating force transmission mechanism and the first rotation axis do not overlap, at least between the insertion position and the retracted position, when viewed in a direction along the optical axis. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a lens barrel that has a simple structure and allows the overall length of the lens barrel to be shortened. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view showing characteristic parts of the lens barrel according to the embodiment. [Figure 2] 1 is a schematic cross-sectional view of a lens barrel according to an embodiment. [Figure 3] FIG. 3 is a cross-sectional view of a first rotating shaft part according to the embodiment. [Figure 4] FIG. 2 is a cross-sectional view of the fourth-group barrel according to the embodiment in an inserted position, as viewed from the imaging surface side on a predetermined optical axis. [Figure 5] FIG. 2 is a cross-sectional view of the fourth-group lens barrel according to the embodiment in a retracted position, as viewed from the imaging surface side on a predetermined optical axis. [Figure 6] 4 is a cross-sectional view of a second rotation shaft portion of the operating member according to the embodiment. FIG. [Figure 7] FIG. 10 is a cross-sectional view of a third rotation shaft portion in the first connecting portion according to the embodiment. [Figure 8] 10 is a cross-sectional view of a second extension portion of a second connecting portion according to an embodiment, the second extension portion extending in the optical axis direction of an intermediate member. FIG. [Figure 9] FIG. 2 is a diagram showing the lens barrel according to the embodiment as viewed from the side on the operation unit side. [Figure 10] 10 is a diagram showing characteristic parts of the lens barrel according to the embodiment from the same perspective as FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, the same members or elements are designated by the same reference numerals, and duplicated descriptions will be omitted or simplified.

[0012] <Embodiment 1> Lens barrel 1 of this embodiment and characteristic features of lens barrel 1 will be described below with reference to Figures 1 to 10. Lens barrel 1 has a mechanism that can insert and remove four-group barrel 202, in response to operation of operating unit 210, between an insertion position where the central axis of magnifying optical system (lens) 201 held in four-group barrel 202 is positioned on the optical axis, and a retracted position where the central axis of magnifying optical system 201 is retracted from the optical axis.

[0013] Fig. 1 is a perspective view showing characteristic parts of a lens barrel 1 according to this embodiment. Specifically, it is a perspective view showing the extender insertion / removal mechanism when a four-group barrel 202 holding a magnifying optical system 201 is in an insertion position where the central axis of the magnifying optical system 201 is aligned with the optical axis OA of the lens barrel 1. Fig. 2 is a schematic cross-sectional view of the lens barrel 1 according to this embodiment.

[0014] The mount 101 is a component fixed to a camera body (not shown) in which an imaging element and the like are disposed, which captures an image of a subject through a magnifying optical system 201 (lens). That is, the mount 101 in the lens barrel 1 is configured to be attachable to a mount provided on the camera body, and by attaching it to the mount provided on the camera body, it can be communicatively connected to the camera body. Furthermore, the lens barrel 1 and a camera body having an imaging element can form an imaging device. The imaging device is configured to be able to capture an image formed through the lens barrel 1. Note that the imaging device may also be an imaging device in which the lens barrel 1 and the camera body are integrated together.

[0015] An outer tube 102 fits radially into a mount 101 that is detachable from the camera body, and the optical axis OA direction is restricted by abutment in the optical axis OA direction (direction along the optical axis). The mount 101 and outer tube 102 are fastened together with a fastening member such as a screw. The outer tube 102 fits radially into a first fixed tube 103, and the optical axis OA direction is restricted by abutment in the optical axis OA direction, and they are fastened together with a screw in the optical axis OA direction.

[0016] The first fixed barrel 103 is radially fitted into the first-group barrel 104 that holds the lens, and the optical axis OA direction is restricted by abutment with the first-group barrel 103 in the optical axis OA direction, and the first fixed barrel 103 is fastened in the optical axis OA direction with a fastening member such as a screw. The third-group barrel 205 is assembled into the first fixed barrel 103 from the imaging plane side and radially fitted into the first-group barrel 103, and the optical axis OA direction is restricted by abutment with the first-group barrel 103 in the optical axis OA direction, and the second fixed member 105 is assembled into the third-group barrel 205 from the object side and radially fitted into the third-group barrel 205, and the optical axis OA direction is restricted by abutment with the third-group barrel 205 in the optical axis OA direction, and the second fixed member 105 is fastened in the optical axis OA direction with a fastening member such as a screw.

[0017] A light intensity adjusting member 106 that adjusts the light intensity of the lens barrel (optical apparatus) 1 is fixed to the second fixing member 105. A second-group barrel 107, which is a focus group, is located radially inside (on the inner diameter side) of the second fixing member 105, and the second-group barrel 107 engages with a linear guide bar (not shown) and is guided in the direction of the optical axis OA by the linear guide bar (moves in a direction along the optical axis). An actuator 109 is a drive source that moves the second-group barrel 107 back and forth in the direction of the optical axis OA, and functions as a drive means.

[0018] A driving force is transmitted to second-group barrel 107 via a rack (not shown) that engages with the drive section of actuator 109, and second-group barrel 107 is capable of moving forward and backward (moving) in the direction of optical axis OA. The rack (not shown) is held rotatably about an axis (not shown) that extends in the direction of optical axis OA relative to second-group barrel 107. The rack (not shown) is biased in the rotational direction by a torsional biasing force generated by a torsion coil spring (not shown), and is pressed against second-group barrel 107 from one radial direction. These biasing forces press the rack (not shown), second-group barrel 107, and actuator 109 against one another, preventing rattling among them.

[0019] The position of the relay barrel 110 in a plane perpendicular to the optical axis is determined by two bosses (not shown), which are position adjustment protrusions arranged at different angular positions around the optical axis and protrude from the first fixed barrel 103 in the optical axis OA direction, and two engagement holes (not shown) on the relay barrel 110 that engage with the bosses. Furthermore, movement in the optical axis OA direction is restricted by abutment in the optical axis OA direction, and the relay barrel 110 is fastened in the optical axis OA direction with a fastening member such as a screw. A control board 111 is fastened to the relay barrel 110 in the optical axis OA direction with a fastening member such as a screw. A fourth-group barrel (movable member) 202 holding the magnifying optical system 201 is held rotatably about a first rotation axis 203, which has an axis parallel to the optical axis OA, for rotating between an inserted position and a retracted position relative to the third-group barrel 205. The retracted position is a position where the central axis of the magnifying optical system 201 held by the fourth-group barrel 202 is retracted from the optical axis OA.

[0020] The detailed configuration of the area around the fourth-group barrel 202 will be described later. The amount and direction of rotation of focus ring 112, which is one of the components that make up the exterior unit, is detected by a detection member (not shown). A predetermined drive signal is sent to actuator 109 from a control circuit on control board 111 based on the output of the detection member (not shown), and actuator 109 drives second-group barrel 107 in the optical axis direction.

[0021] Fourth group barrel 202 has first rotation axis 203, and rotates (turns) around first rotation axis 203 (around the rotation axis) as described above. Furthermore, lens barrel 1 is located on the outer side (outer diameter side) of lens barrel 1 in the radial direction, and is integrally connected to operation unit 210 that is operated by the photographer. Fourth group barrel 202 also has operation member 212 that rotates around second rotation axis 211 having an axis parallel to optical axis OA.

[0022] The intermediate member 213 has a first connecting portion 215 and a second connecting portion 217. The first connecting portion 215 is connected to the operation member 212 so as to be rotatable relative to the operation member 212 about a third rotation axis 214 having an axis parallel to the optical axis OA. The second connecting portion 217 engages with a guide portion 216 provided on the fourth-group barrel 202. The second connecting portion 217 is a member that transmits a driving force for rotating the fourth-group barrel 202 about the first rotation axis 203 from the inserted position to the retracted position, or in the opposite direction. Furthermore, the second connecting portion 217 can move within the guide portion 216 between the inserted position and the retracted position by engaging with the guide portion 216 provided on the fourth-group barrel 202 in a plane (within the plane) perpendicular to the optical axis OA.

[0023] One end of the first biasing member 218 is engaged with a first engagement portion 219 near the shaft portion of the second rotation shaft 211, and the other end is engaged with a second engagement portion 220 near the second connecting portion 217. The first biasing member 218 attracts the first engagement portion 219 and the second engagement portion 220 to each other with its biasing force. In other words, the biasing member can apply a biasing force to the fourth group barrel 202 to hold the fourth group barrel 202 in the inserted position and the retracted position. The first biasing member 218 is a tension coil spring having hook portions (not shown) on both ends. These configurations will be described in detail later.

[0024] 3 is a cross-sectional view of first rotation axis 203 of fourth-group barrel 202 according to this embodiment. First abutment surface 221 of fourth-group barrel 202 having first rotation axis 203 is a surface that abuts against third-group barrel 205 in the direction of optical axis OA. Specifically, it abuts against second abutment surface 222, which is the surface of third-group barrel 205 facing fourth-group barrel 202 in the direction of optical axis OA. Fourth-group barrel 202 has first fitting portion 204 coaxial with first rotation axis 203. First fastening member 223 has second fitting portion 224. Furthermore, first fitting portion 204 of fourth-group barrel 202 fits into second fitting portion 224 of first fastening member 223. Third-group barrel 205 has third fitting portion 225. The second fitting portion 224 also fits into the third fitting portion 225. In this manner, the second fitting portion 224 fits into the first fitting portion 204 and the third fitting portion 225.

[0025] Third abutment surface 226 of first fastening member 223 is a surface that abuts against third-group barrel 205 in the optical axis OA direction, and abuts against fourth abutment surface 227, which is the surface of third-group barrel 205 on the first fastening member 223 side in the optical axis OA direction. This restricts movement of fourth-group barrel 202 in the optical axis OA direction. First fastening member 223 is then fastened to third-group barrel 205 by first screw portion 228.

[0026] A second biasing member 230 is sandwiched between the bottom surface of countersunk hole portion 229 of fourth-group barrel 202 and first fastening member 223, and the biasing force of second biasing member 230 biases fourth-group barrel 202 toward third-group barrel 205, restricting movement in the direction of optical axis OA. As a result, fourth-group barrel 202 is rotatable (rotatable) around first rotation axis 203 while being restricted from movement in the direction of optical axis OA. Note that any means may be used as the means for rotation.

[0027] Fig. 4 is a cross-sectional view of the magnifying optical system 201 held by the four-group barrel 202 according to this embodiment, viewed from the imaging surface side on the optical axis OA, when the magnifying optical system 201 is in an inserted position where the central axis of the magnifying optical system 201 is aligned with the optical axis OA. Fig. 5 is a cross-sectional view of the four-group barrel 202 according to this embodiment, viewed from the imaging surface side on the optical axis OA, when the magnifying optical system 201 is in a retracted position.

[0028] 4, when fourth group barrel 202 moves from the retracted position to the inserted position, rotation around first rotation axis 203 is restricted by first restricting portion 208 of fourth group barrel 202 abutting against second restricting portion 209 on the third group barrel 205 side. In other words, even if fourth group barrel 202 rotates around first rotation axis 203, first restricting portion 208 provided on fourth group barrel 202 abuts against second restricting portion 209 provided on the third group barrel, thereby restricting rotation around first rotation axis 203.

[0029] 5, the fourth-group barrel 202 reaches the retracted position by rotating about the first rotation axis 203 in a direction away from the operation unit 210 in an area opposite to the area where the operation unit 210 is located. As a result, even if the fourth-group barrel 202 overlaps with the operation unit 210 in the direction of the optical axis OA, there is no interference between the fourth-group barrel 202 and the operation unit 210 in the retracted position. This also means that the photographer can operate the camera without any restrictions on the movement of his or her right hand, allowing for comfortable operation.

[0030] Furthermore, a buffer member (not shown) may be disposed between the first restricting portion 208 and the second restricting portion 209. That is, a buffer member may be attached to the surface of the first restricting portion 208 that comes into contact with the second restricting portion 209, or to the surface of the second restricting portion 209 that comes into contact with the first restricting portion 208, or to both. This makes it possible to reduce damage to both the first restricting portion 208 and the second restricting portion 209, which would otherwise be caused by a large impact if they collide, and to reduce the impact noise at the time of the collision.

[0031] 6 is a cross-sectional view of the second rotation shaft 211 of the operating member 212 according to this embodiment. The operating member 212 has a fourth fitting portion 231. The operating member 212 fits into the operating unit 210 via the fourth fitting portion 231. That is, the fourth fitting portion 231 fits into a recess provided in the operating unit 210. Furthermore, the fifth abutment surface 232 of the operating member 212 is a surface that abuts against the operating unit 210 in the optical axis OA direction, and abuts against a surface of the operating unit 210 on the operating member 212 side.

[0032] The operation member 212 is fastened to the operation unit 210 by the second fastening member 233 while its rotation relative to the operation unit 210 is restricted. As a result, when the photographer (operator) operates the operation unit 210, the operation member 212 rotates integrally with the operation unit 210 around the second rotation axis 211. The operation member 212 also has a first extension portion 242 that extends in the direction of the optical axis OA. The first extension portion 242 is provided with a first engagement portion 219, and as described above, the first engagement portion 219 engages with one end of the first biasing member 218.

[0033] 7 is a cross-sectional view of the third rotation shaft 214 in the first coupling portion 215 according to this embodiment. The third fastening member 235 has a fifth fitting portion 236. Furthermore, the intermediate member 213 has a sixth fitting portion 237. The fifth fitting portion 236 of the third fastening member 235 fits with the sixth fitting portion 237 of the intermediate member 213. The operating member 212 has a seventh fitting portion 238. The fifth fitting portion 236 of the third fastening member 235 fits with the seventh fitting portion 238 of the operating member 212.

[0034] A sixth abutment surface 239 of the intermediate member 213 is a surface that abuts against the operating member 212 in the optical axis OA direction, and abuts against a seventh abutment surface 240, which is the surface of the operating member 212 facing the operating member 212. This allows the intermediate member 213 and the operating member 212 to abut via the above-mentioned surfaces. In the first connecting portion 215, the intermediate member 213 and the operating member 212 are sandwiched between a third fastening member 235 and a nut member 241, and are relatively rotatable around the third rotation shaft 214.

[0035] 8 is a cross-sectional view of a second extension portion 243 that extends in the optical axis OA direction of intermediate member 213 in second connecting portion 217 according to this embodiment. A fourth fastening member 244 is fastened (attached) to second engaging portion 220 via a bearing (moving member) 245. As shown in FIG. 8, bearing 245 is sandwiched between second extension portion 243 and fourth fastening member 244. An outer diameter portion 246 of bearing 245 abuts against guide portion 216 provided on fourth group barrel 202.

[0036] As shown in Fig. 4, when the fourth-group barrel 202 is in the inserted position, first biasing member 218 exerts an attractive force between first engagement portion 219 and second engagement portion 220, which are engaged with one end and the other end of first biasing member 218, respectively. As a result, a biasing force F1 is applied from bearing 245 attached to intermediate member 213 to guide portion 216 of fourth-group barrel 202. As a result of biasing force F1 being applied to fourth-group barrel 202, a moment acts on fourth-group barrel 202 in the counterclockwise direction about first rotation axis 203 in Fig. 4. As a result, when fourth-group barrel 202 is in the inserted position, fourth-group barrel 202 is constantly biased so as to maintain the inserted position.

[0037] When the operation unit 210 is rotated around the second rotation shaft 211, the operation member 212 and the intermediate member 213 rotate relatively around the third rotation shaft 214 in the first connecting portion 215. This causes the bearing 245 of the second connecting portion 217 to move within the guide portion of the fourth group barrel 202 and assume the retracted position shown in Fig. 5. That is, the second connecting portion 217 also moves in conjunction with the movement direction of the bearing.

[0038] Even when in the retracted position, first biasing member 218 exerts an attractive force between first engagement portion 219 and second engagement portion 220, which are engaged with one end and the other end of first biasing member 218, respectively. As a result, a biasing force F2 is applied from bearing 245 attached to intermediate member 213 to guide portion 216 of fourth group barrel 202. As a result of biasing force F2 being applied to fourth group barrel 202, a moment acts on fourth group barrel 202 in the clockwise direction about first rotation axis 203 in FIG. 5. As a result, when fourth group barrel 202 is in the retracted position, fourth group barrel 202 is always biased so as to maintain the retracted position.

[0039] In this way, the second connecting portion 217 moves within the guide portion 216 between the inserted position and the retracted position, and the position at which it engages with the guide portion 216 changes, thereby reversing the direction of the moment around the first rotation axis 203 applied to the fourth group barrel 202.

[0040] 4, bearing 245 is in contact with guide portion 216 of fourth-group barrel 202, whereas in the retracted position of Fig. 5, bearing 245 has moved to a position where it is in contact with guide portion 216. In this way, bearing 245 rolls (slides) while in contact with guide portion 216 from the inserted position to the retracted position, or in the opposite direction, and moves within guide portion 216.

[0041] Furthermore, the guide portion 216 is formed with a non-linear shape so that the fourth-group barrel 202 is held at the inserted position and the retracted position. Specifically, the intermediate region 248 of the guide portion 216 has a shape that convex in the direction opposite to the direction in which the second connecting portion 217 receives the biasing force from the first biasing member 218. In other words, as shown in FIGS. 4 and 5 , the guide portion 216 has a curved shape that protrudes in the direction opposite to the direction in which the biasing force is received. Therefore, from the start of movement, the bearing 245 gradually moves within the guide portion 216 from the inserted position to the retracted position, or in the opposite direction, and maintains its position at the inserted position and the retracted position. Note that the intermediate region 248 is a region within the guide portion 216 other than when the fourth-group barrel 202 is at the inserted position or the retracted position. Specifically, it refers to a region within the guide portion 216 other than when the bearing 245 is located at one end of the guide portion 216 and when the bearing 245 is located at the other end.

[0042] In the conventional mechanism, first rotation shaft 203 of fourth group barrel 202 and first biasing member 218 had to be arranged to overlap when viewed from the direction of optical axis OA while fourth group barrel 202 was moving from the inserted position to the retracted position. As a result, space was always required in the direction of optical axis OA to avoid interference with the front and rear members, which could be a factor preventing the overall length of lens barrel 1 from being shortened.

[0043] In this embodiment, the operating force transmission mechanism, which transmits the operating force generated when the photographer operates the operating unit 210 to the fourth-group barrel 202 that holds the magnifying optical system 201, can be configured in a position that never overlaps with the first rotation shaft 203 of the fourth-group barrel 202 when viewed from the direction along the optical axis OA. In other words, the operating force transmission mechanism and the first rotation shaft 203 do not overlap at least between the insertion position and the retracted position when viewed from the direction along the optical axis OA. The operating force transmission mechanism is configured with at least the operating member 212, the intermediate member 213, the first connecting portion 215, the second connecting portion 217, and the first biasing member 218.

[0044] Fig. 9 is a view of lens barrel 1 according to this embodiment, viewed from the side on the operation unit 210 side. Fig. 10 is a cross-sectional view showing characteristic parts of lens barrel 1 according to this embodiment, taken from the same perspective as Fig. 9. As shown in Fig. 10, in this embodiment, operation member 212, intermediate member 213, and first biasing member 218 overlap in the direction of optical axis OA with fourth group barrel 202, which rotates around first rotation axis 203, and first fastening member 223 and second biasing member 230 that support the rotation.

[0045] As described above, the lens barrel 1 of this embodiment has a simple structure, yet allows for a space-saving mechanism for inserting and removing the extender, and enables the overall length of the lens barrel to be shortened.

[0046] The embodiment described above is merely a typical example, and various modifications and changes can be made to the embodiment when implementing the present invention.

[0047] The disclosure of this embodiment includes the following configuration.

[0048] (Configuration 1) A lens barrel in which a movable member can be inserted into and removed from an insertion position where a central axis of a lens held by the movable member is positioned on an optical axis and a retracted position where the central axis of the lens is retracted from the optical axis in response to an operation of an operation unit, an operation force transmission mechanism that transmits an operation force of the operation unit to the movable member; the movable member has a first rotation axis having an axis parallel to an optical axis for rotating between the insertion position and the retracted position; The lens barrel is characterized in that the operating force transmission mechanism and the first rotation shaft do not overlap at least between the insertion position and the retracted position when viewed from a direction along the optical axis.

[0049] (Configuration 2) The lens barrel according to configuration 1, wherein the operation force transmission mechanism has a biasing member that applies a biasing force to the movable member to hold the movable member at the inserted position and the retracted position.

[0050] (Configuration 3) The operation force transmission mechanism includes: an operating member that is rotatable around a second rotation axis having an axis parallel to the optical axis in response to an operation of the operating unit; a first connecting portion connected to the operating member so as to be rotatable relative to the operating member around a third rotation axis having an axis parallel to the optical axis; 3. The lens barrel according to configuration 1 or 2.

[0051] (Configuration 4) the operation force transmission mechanism has a second connecting portion that transmits a driving force to rotate the movable member around the first rotation axis from the insertion position to the retracted position or in the opposite direction, The lens barrel described in any one of configurations 1 to 3, characterized in that the second connecting portion moves within the guide portion between the insertion position and the retracted position by engaging with a guide portion provided on the movable member.

[0052] (Configuration 5) The lens barrel described in configuration 4, wherein the second connecting portion moves within the guide portion between the insertion position and the retracted position of the movable member, and the position at which it engages with the guide portion changes, thereby reversing the direction of the moment around the first rotation axis applied to the movable member.

[0053] (Configuration 6) The lens barrel described in configuration 4 or 5, wherein a movable member is attached to the second connecting portion, and when the movable member moves within the guide portion, the second connecting portion also moves in conjunction with the movable member.

[0054] (Configuration 7) The movable member is a guide portion provided in a plane perpendicular to the optical axis; a first restricting portion that restricts rotation of the movable member around the first rotation axis at the insertion position, 4. The lens barrel according to any one of configurations 1 to 3.

[0055] (Configuration 8) a second restricting portion that restricts rotation of the movable member around the first rotation axis, The lens barrel of configuration 7, wherein when the movable member rotates around the first rotation axis, the first regulating portion abuts against the second regulating portion, thereby regulating the rotation around the first rotation axis.

[0056] (Configuration 9) The operation force transmission mechanism includes: an intermediate member having a second connecting portion that engages with a guide portion provided on the movable member; a biasing member having one end that engages with a first engaging portion provided on a shaft portion of a second rotation shaft having an axis parallel to the optical axis in response to operation of the operating portion, and the other end that engages with a second engaging portion provided on the second connecting portion, 2. The lens barrel according to claim 1,

[0057] (Configuration 10) The lens barrel according to configuration 9, wherein the biasing member is a coil spring that attracts the first engagement portion and the second engagement portion to each other when viewed in a direction along the optical axis.

[0058] (Configuration 11) 4. The lens barrel according to any one of configurations 1 to 3, wherein the movable member has a guide portion that is non-linearly configured in a plane perpendicular to the optical axis.

[0059] (Configuration 12) The lens barrel described in configuration 1 is characterized in that an intermediate region, which is a region between the insertion position and the retracted position of the movable member in the guide portion provided on the movable member, is configured in a shape that is convex in the direction opposite to the direction in which the second connecting portion that engages with the guide portion receives the biasing force from the biasing member.

[0060] (Configuration 13) an image sensor that captures an image of a subject through a lens; and the lens barrel according to any one of configurations 1 to 12. An imaging device characterized by: [Explanation of symbols]

[0061] 201 Magnifying Optical System 202 4th group lens barrel 203 First Rotation Axis 109 First Guide Bar 210 Operation section 211 Second Rotation Axis 212 Operating member 213 Intermediate parts 214 Third Axis of Rotation 215 First Connection 216 Guide section 217 Second Connection 218 first biasing member

Claims

1. A lens barrel in which a movable member can be inserted into and removed from an insertion position where a central axis of a lens held by the movable member is positioned on an optical axis and a retracted position where the central axis of the lens is retracted from the optical axis in response to an operation of an operation unit, an operation force transmission mechanism that transmits an operation force of the operation unit to the movable member; the movable member has a first rotation axis that is parallel to an optical axis and rotates between the insertion position and the retracted position; The lens barrel according to claim 1, wherein the operating force transmission mechanism and the first rotation shaft do not overlap at least between the insertion position and the retracted position when viewed in a direction along the optical axis.

2. 2. The lens barrel according to claim 1, wherein the operation force transmission mechanism includes a biasing member that applies a biasing force to the movable member to hold the movable member at the inserted position and the retracted position.

3. The operation force transmission mechanism includes: an operating member that is rotatable around a second rotation axis having an axis parallel to the optical axis in response to an operation of the operating unit; a first connecting portion connected to the operating member so as to be rotatable relative to the operating member around a third rotation axis having an axis parallel to the optical axis; 2. The lens barrel according to claim 1.

4. the operation force transmission mechanism has a second connecting portion that transmits a driving force to rotate the movable member around the first rotation axis from the insertion position to the retracted position, or in the opposite direction; The lens barrel according to claim 1 , wherein the second connecting portion engages with a guide portion provided on the movable member, thereby moving within the guide portion between the insertion position and the retracted position.

5. The lens barrel according to claim 4, characterized in that the second connecting portion moves within the guide portion between the insertion position and the retracted position of the movable member, and the position at which it engages with the guide portion changes, thereby reversing the direction of the moment around the first rotation axis applied to the movable member.

6. 5. The lens barrel according to claim 4, wherein a moving member is attached to the second connecting portion, and when the moving member moves within the guide portion, the second connecting portion also moves in conjunction with the moving member.

7. The movable member is a guide portion provided in a plane perpendicular to the optical axis; a first restricting portion that restricts rotation of the movable member around the first rotation axis at the insertion position, 2. The lens barrel according to claim 1.

8. a second restricting portion that restricts rotation of the movable member around the first rotation axis, 8. The lens barrel according to claim 7, wherein when the movable member rotates around the first rotation axis, the first regulating portion abuts against the second regulating portion, thereby regulating the rotation around the first rotation axis.

9. The operation force transmission mechanism includes: an intermediate member having a second connecting portion that engages with a guide portion provided on the movable member; a biasing member having one end that engages with a first engaging portion provided on a shaft portion of a second rotation shaft having an axis parallel to the optical axis in response to operation of the operating portion, and the other end that engages with a second engaging portion provided on the second connecting portion, 2. The lens barrel according to claim 1.

10. 10. The lens barrel according to claim 9, wherein the biasing member is a coil spring that attracts the first engaging portion and the second engaging portion to each other when viewed in a direction along the optical axis.

11. 2. The lens barrel according to claim 1, wherein the movable member has a guide portion that is non-linearly formed in a plane perpendicular to the optical axis.

12. The lens barrel according to claim 1, characterized in that an intermediate region, which is a region between the insertion position and the retracted position of the movable member in the guide portion provided on the movable member, is configured in a shape that is convex in a direction opposite to a direction in which the second connecting portion that engages with the guide portion receives a biasing force from the biasing member.

13. an image sensor that captures an image of a subject through a lens; and the lens barrel according to any one of claims 1 to 12. An imaging device characterized by:

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