Lens attachment and lens device

Abstract

The utility model provides a lens accessory and a lens device, which can obtain good appearance and ensure strength at the same time. A lens shade (1) attached to an interchangeable lens (50) is provided with: a guide rail section (10) that engages with a flange section (53) of the interchangeable lens (50); and a restraining mechanism for restraining both end portions of the flange portion (53) of the interchangeable lens (50). The constraining mechanism includes a lever member (20) capable of switching between constraining and releasing of the flange portion (53) by rotation. The lever member (20) has an inclined surface portion (26) formed on a surface in a direction away from an optical axis (X) of the interchangeable lens (50). Furthermore, in the lever member (20), a fulcrum portion (25) on which the rotating shaft (21) is provided is formed in a concave shape.

Description

Technical Field

[0001] The utility model relates to a lens accessory and a lens device. Background Art

[0002] Patent document 1 describes a lens hood mounting mechanism comprising: a plurality of bayonet protrusions disposed at the end of a lens barrel; a bayonet support portion protruding in a flange shape at the rear end portion of the lens hood and having gaps formed in the circumferential direction of the optical axis to form notches for the bayonet protrusions to be embedded; and an elastic component having a force-applying portion and a stopper portion, wherein the force-applying portion is disposed at the bayonet support portion and presses the bayonet protrusion in the direction of the optical axis, and the stopper portion positions the lens hood relative to the lens barrel by abutting against the circumferential end of the bayonet protrusion.

[0003] Patent document 2 describes a lens hood having an inner peripheral protrusion between a bayonet claw and a flange portion that enters into the lens barrel, and can be loaded and unloaded from the lens barrel by rotating it. The lens hood has a locking mechanism, which is composed of a locking rod clamped by a hood base and a hood cover, and a torsion spring that generates a force between the hood cover and the locking rod. The distal end of the locking rod contacts the end of the bayonet claw of the lens barrel due to the force of the torsion spring, thereby limiting rotation around the optical axis and preventing shaking relative to the lens barrel.

[0004] Patent document 3 describes a mounting device for a lens hood, which is a bayonet-type lens hood that can be mounted on and removed from a lens, wherein a notch is formed on a portion of a bayonet claw provided on the inner periphery of the lens hood, a circular silicone rubber wider than the width of the bayonet claw is fixed to the notch, and the bayonet claw and the circular silicone rubber are fitted into a groove formed by a lens side claw formed on the outer periphery of the lens, so that the elasticity of the silicone rubber is utilized to press the groove from the inside.

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 08-082830

[0006] Patent Document 2: Japanese Patent Application Publication No. 2016-109944

[0007] Patent Document 3: Japanese Utility Model Application Laid-Open No. 06-055139 Utility Model Content

[0008] One embodiment of the technology according to the present invention provides a lens attachment and a lens device that can achieve a good appearance and ensure strength. (1)

[0010] A lens accessory is mounted on a lens device, and the lens accessory comprises:

[0011] A clamping portion, clamped with the clamped portion of the lens device; and

[0012] The restraining mechanism restrains the two ends of the above-mentioned engaged portion,

[0013] The restraint mechanism includes a rod member, and the rod member can switch between the restraint and the release by rotating.

[0014] The lever member has a first inclined surface formed on a surface in a direction away from the optical axis of the lens device, and the fulcrum portion of the rotation is concave. (2)

[0016] The lens accessory according to (1), wherein:

[0017] The rod member is provided on the shading cover member, and the shading cover member has a second inclined surface on a surface in a direction away from the optical axis.

[0018] The fulcrum portion of the lever member is provided at a position where at least a portion overlaps with the second inclined surface portion when viewed from the rotation axis direction of the lever member. (3)

[0020] The lens accessory according to (1) or (2), wherein:

[0021] The first inclined surface portion has an inclined surface whose distance from the optical axis becomes shorter toward a first direction along the optical axis. (4)

[0023] The lens accessory according to (3), wherein:

[0024] The concave shape is a shape that is recessed in a direction along the optical axis. (5)

[0026] The lens accessory according to (3), wherein:

[0027] The concave shape is a concave shape when viewed from a direction intersecting the optical axis. (6)

[0029] The lens accessory according to any one of (1) to (5), wherein:

[0030] The above-mentioned engaging portion is a bayonet structure.

[0031] The lens attachment has one or more first force-applying parts, and the one or more first force-applying parts apply force to the engaged part in the radial direction of rotation of the bayonet structure in the engaged state.

[0032] A direction of a resultant force of the urging forces of the one or more first urging parts includes a radial direction of rotation of the bayonet structure. (7)

[0034] The lens accessory according to (6), wherein:

[0035] The rod member has a protrusion, and the protrusion is engaged with one end of the engaged portion in the restrained state.

[0036] The direction of the resultant force is a direction in which one end of the engaged portion engages with the protrusion in the constrained state. (8)

[0038] The lens accessory according to (6) or (7), wherein:

[0039] The one or more first biasing parts are a plurality of biasing parts. (9)

[0041] The lens accessory according to any one of (1) to (8), wherein:

[0042] The lever member has a pressing portion, and is displaced from the first position to the second position by pressing the pressing portion.

[0043] The restraining mechanism includes a second force applying portion, and the second force applying portion maintains the rod member at the first position in the engaged state.

[0044] The second biasing portion is provided at a position where at least a portion overlaps with the pressing portion when viewed from the pressing direction of the pressing portion. (10)

[0046] A lens attachment, comprising:

[0047] An engaging portion of the bayonet structure engaged with the engaged portion of the lens device;

[0048] A restraining mechanism restrains the two ends of the above-mentioned engaged portion; and

[0049] One or more force-applying parts apply force to the engaged part in the radial direction of rotation of the bayonet structure in the engaged state,

[0050] The direction of the resultant force of the urging force from the one or more urging parts is the radial direction of the rotation of the bayonet structure. (11)

[0052] A lens device comprising:

[0053] A clamping portion, which is clamped with a clamped portion of the lens accessory; and

[0054] The restraining mechanism restrains the two ends of the above-mentioned engaged portion,

[0055] The restraint mechanism includes a rod member, and the rod member can switch between the restraint and the release by rotating.

[0056] The lever member has an inclined surface formed on a surface in a direction away from the optical axis, and the fulcrum portion of the rotation has a concave shape. (12)

[0058] A lens device comprising:

[0059] An engaging portion of the bayonet structure engaged with an engaged portion of the lens accessory;

[0060] A restraining mechanism restrains the two ends of the above-mentioned engaged portion; and

[0061] One or more force-applying parts apply force to the engaged part in the radial direction of rotation of the bayonet structure in the engaged state,

[0062] The direction of the resultant force of the urging force from the one or more urging parts is the radial direction of the rotation of the bayonet structure.

[0063] Utility Model Effect

[0064] According to the present invention, it is possible to provide a lens attachment and a lens device that can achieve a good appearance and ensure strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a perspective view showing an example of the lens attachment according to the present embodiment.

[0066] Figure 2 It is a perspective view showing an example of the lens device according to the present embodiment.

[0067] Figure 3 1 is a perspective view showing the lens hood 1 attached to the interchangeable lens 50 .

[0068] Figure 4 It is a perspective view showing the lens hood 1 mounted reversely on the interchangeable lens 50 .

[0069] Figure 5 1 is a diagram showing the structure of the hood connecting portion 3 in the lens hood 1 .

[0070] Figure 6 1 is a diagram showing an example of the biasing force applied from the hood connecting portion 3 to the interchangeable lens 50 when the lens hood is normally mounted.

[0071] Figure 7 The hood connecting portion 3 of the lens hood 1 is shown to be mounted on the lens connecting portion 52 of the interchangeable lens 50 in a normal mounting manner.

[0072] Figure 8 This is a diagram showing an example of the biasing force applied from the hood connecting portion 3 to the interchangeable lens 50 when the lens hood is reversely mounted.

[0073] Fig. 9 The diagram shows the hood connecting portion 3 of the lens hood 1 which is mounted in reverse on the lens connecting portion 52 of the interchangeable lens 50 .

[0074] Fig.10 1 is a diagram showing an example of the urging member 12 a provided on the rail portion 10 of the shade connecting portion 3 .

[0075] Fig.11 It is a diagram showing an example of the mounting recess 131 to which the urging member 12 a is mounted.

[0076] Fig.12 It is a perspective view showing an example of the lever member 20 as seen from the side where the lever protrusion 23 is provided.

[0077] Fig.13 It is a perspective view showing an example of the lever member 20 as viewed from the side where the button 22 is provided.

[0078] Fig.14 It is a cross-sectional view of the button 22 and the biasing spring 24 in the lever member 20 provided in the hood connecting portion 3 .

[0079] Fig.15 It is a cross-sectional view showing the position of the rotation axis 21 of the lever member 20 provided in the hood connecting portion 3 .

[0080] Fig.16 It is a perspective view showing an example of an interchangeable lens 50 provided with a restraint mechanism.

[0081] Fig.17 It is a perspective view showing the structure of the lens connecting portion 52 in the interchangeable lens 50 .

[0082] Fig.18 yes Fig.17 A top view of the lens connection portion 52 is shown. DETAILED DESCRIPTION

[0083] Hereinafter, an example of embodiment of the present invention will be described with reference to the drawings.

[0084] <Lens accessories of embodiment>

[0085] Figure 1 1 is a perspective view showing an example of a lens attachment according to the present embodiment. Figure 1 As shown in FIG. 1 , as an example of a lens accessory, a lens accessory that can be mounted on a lens device (in Figure 2The lens hood 1 is formed in a cylindrical shape as a whole. The lens hood 1 includes a hood body 2 and a hood connection portion 3.

[0086] The hood body 2 is formed into a cylindrical shape. The hood connection part 3 is provided at one end of the hood body 2. The hood connection part 3 can also be loaded and unloaded relative to the hood body 2. The hood connection part 3 is formed into a cylindrical shape whose diameter gradually decreases as it moves away from the hood body 2. An inclined portion 3a whose diameter gradually decreases as it moves away from the hood body 2 is provided on the outer peripheral surface of the hood connection part 3. The hood connection part 3 can be mounted on the hood body 2 using screws, for example.

[0087] Furthermore, the lens hood 1 includes a button 22 that is operated when the lens hood 1 is removed from the interchangeable lens. Furthermore, the lens hood 1 includes a filter operation window 40 that is used when a filter attached to the interchangeable lens is rotated.

[0088] <Lens Device of Embodiment>

[0089] Figure 2 FIG. 1 is a perspective view showing an example of a lens device according to the present embodiment. Figure 2 As shown in the figure, as an example of a lens device, an interchangeable lens 50 to which a lens hood 1 is mounted can be cited. The interchangeable lens 50 includes a lens barrel 51 and a lens connecting portion 52. In addition, in the interchangeable lens 50 of this example, the illustration of the lens component is omitted. The lens component is arranged inside the lens barrel 51 in such a way that its optical axis X passes through the center of the lens barrel 51. The interchangeable lens 50 is, for example, interchangeably mounted on an imaging device such as a camera.

[0090] The lens barrel 51 is formed in a cylindrical shape. The lens connecting portion 52 is provided continuously with the lens barrel 51 at one end portion of the lens barrel 51. The one end portion is the end portion opposite to the imaging device (imaging element) side on which the interchangeable lens 50 is mounted.

[0091] A flange portion 53 is formed on the outer peripheral surface of the lens connecting portion 52. The flange portion 53 is formed to protrude radially outward from the outer peripheral surface of the lens connecting portion 52 and extend in the circumferential direction. The flange portion 53 is a portion for mounting the lens hood 1. The flange portion 53 is formed, for example, in the shape of a single guide rail on the outer peripheral surface of the lens connecting portion 52. The length of the flange portion 53 extending in the circumferential direction is the length of a prescribed interval in the circumferential direction (equivalent to a prescribed center angle). The number of flange portions 53 may be singular, or a plurality of flange portions 53 may be provided at prescribed intervals in the circumferential direction. The flange portion 53 is an example of a "locked portion" in the present utility model.

[0092] <Attaching the lens hood 1>

[0093] Figure 3 1 is a perspective view showing the lens hood 1 mounted on the interchangeable lens 50. Figure 3 As shown, the lens hood 1 is mounted on one end portion (the side where the lens connecting portion 52 is provided) of the interchangeable lens 50. The lens hood 1 is configured as follows: the hood connecting portion 3 of the lens hood 1 is engaged with the outer peripheral side of the lens connecting portion 52 of the interchangeable lens 50 and the lens hood 1 is rotated in the circumferential direction, so that it can be mounted on the interchangeable lens 50.

[0094] The lens hood 1 is mounted on the interchangeable lens 50 in a bayonet-type manner. The lens hood 1 has an appearance shape in which the diameter of the hood body 2 is large and the diameter of the hood connecting portion 3 gradually decreases as it approaches the interchangeable lens 50. In addition, in the following description, in the lens hood 1, the end portion on one side where the hood connecting portion 3 is provided is referred to as the "rear end portion" of the lens hood 1, and the end portion on the opposite side is referred to as the "front end portion" of the lens hood 1. Furthermore, in the interchangeable lens 50, the end portion on one side where the lens connecting portion 52 is provided is referred to as the "front end portion" of the interchangeable lens 50, and the end portion on the opposite side is referred to as the "rear end portion" of the interchangeable lens 50.

[0095] Figure 4 1 is a perspective view showing the lens hood 1 mounted reversely on the interchangeable lens 50. Figure 4 As shown in FIG. 1 , the lens hood 1 is configured to be attachable to the interchangeable lens 50 in a state where the front-rear direction of the lens hood 1 is reversed. The lens hood 1 can be, for example, mounted on the interchangeable lens 50 when the imaging device is not in use. Figure 4 One way to store the lens hood 1 is to install it reversely as shown.

[0096] At this time, the lens hood 1 is configured as follows: the interchangeable lens 50 is covered in the lens hood 1 through the opening on the front end side of the lens hood 1, the hood connecting portion 3 of the lens hood 1 is engaged with the lens connecting portion 52 of the interchangeable lens 50, and the lens hood 1 is rotated in the circumferential direction, so that it can be attached to the interchangeable lens 50. In the following description, Figure 3 The method of attaching the lens hood 1 in such a direction is also called "normal mounting".

[0097] <Structure of light shielding cover connecting portion 3>

[0098] Figure 5 1 is a diagram showing the structure of the hood connecting portion 3 in the lens hood 1 . Figure 5 The shading cover connecting portion 3 shown is a perspective view of the shading cover connecting portion 3 removed from the shading cover main body 2 as viewed from the side where the shading cover main body 2 is mounted.

[0099] like Figure 5As shown, a rail portion 10 is provided on the inner circumferential surface of the hood connection portion 3. The rail portion 10 is a portion that slides relative to the flange portion 53 of the interchangeable lens 50 when the lens hood 1 is rotated when the lens hood 1 is mounted on the interchangeable lens 50. The rail portions 10 are provided only in the same number as the number of flange portions 53 of the interchangeable lens 50. In the hood connection portion 3 of this example, two rail portions 10 are provided in an opposing manner. And, the two rail portions 10 are formed to have a length corresponding to the length of the flange portion 53 of the interchangeable lens 50. For example, the rail portion 10 can be formed in the shape of a groove that engages with the flange portion 53 of the interchangeable lens 50. The rail portion 10 has a bayonet structure. The rail portion 10 is an example of a "engaging portion" in the present utility model.

[0100] A rail locking portion 11 capable of locking with the flange portion 53 of the interchangeable lens 50 is provided at one end portion of the rail portion 10. The rail locking portion 11 is a portion capable of locking with the end portion of the flange portion 53 in the direction opposite to the rotation direction of the lens hood 1 when the lens hood 1 is rotated when the lens hood 1 is mounted on the interchangeable lens 50. The rail locking portion 11 is formed as a protrusion protruding from the rail portion 10 toward the inner side in the radial direction of the lens hood 1.

[0101] Furthermore, the rail portion 10 is provided with biasing members 12a and 12b capable of biasing the flange portion 53 of the interchangeable lens 50 engaged with the rail portion 10 toward the inner side in the radial direction of the lens hood 1. The biasing members 12a are arranged adjacent to the rail stopper 11 on the rail portion 10. The biasing members 12a are provided on the rotation direction side of the lens hood 1 more than the rail stopper 11 when the lens hood 1 is rotated in the circumferential direction of the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50.

[0102] In contrast, the urging member 12b is provided at the end portion of the rail portion 10 opposite to the end portion provided with the rail locking portion 11. The urging member 12b is provided at the end portion on the rotation direction side of the lens hood 1 when the lens hood 1 is mounted on the interchangeable lens 50 and the lens hood 1 is rotated in the circumferential direction of the interchangeable lens 50. The urging members 12a and 12b are an example of the "first urging portion" in the present invention.

[0103] In addition to the force applying members 12a and 12b, the force applying members 12c and 12d are provided. The force applying members 12c and 12d are provided when the lens hood 1 is reversely mounted on the interchangeable lens 50 (refer to Figure 4), a force applying member capable of applying force to the flange portion 53 of the interchangeable lens 50 inward in the radial direction of the lens hood 1. The force applying member 12c is provided on the inner peripheral surface of the hood connecting portion 3 between the force applying member 12b and the rod member 20. The force applying member 12d is provided on the inner peripheral surface of the hood connecting portion 3 between the force applying member 12a and the force applying member 12b.

[0104] Furthermore, a rod member 20 is provided on the inner circumferential side of the hood connection portion 3. The rod member 20 extends along the circumferential direction of the hood connection portion 3 along the rail portion 10. The rod member 20 is provided on the side of the rail portion 10 opposite to the end side where the rail locking portion 11 is provided. The rod member 20 has a rotation axis 21 in the center. Furthermore, the rod member 20 has the button 22 at one end portion, and has a rod protrusion 23 at the end portion on the side opposite to the side where the button 22 is provided.

[0105] The rotation shaft 21 is provided so as to extend in the front-rear direction of the lens hood 1, that is, so as to be provided along the optical axis X of the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50. One end of the rotation shaft 21 is inserted into the shaft hole 13 formed in the hood connecting portion 3. The other end of the rotation shaft 21 (at Figure 5 The end of the rotating shaft 21 observed in FIG. 1 is embedded in the shaft hole (at the end of the rotating shaft 21 observed in FIG. 1 ) formed on the shading cover main body 2 to which the shading cover connecting portion 3 is installed. Fig.15 will be described later).

[0106] The button 22 is provided so as to face the outer side in the radial direction of the lens hood 1. On the other hand, the lever protrusion 23 is provided so as to face the inner side in the radial direction of the lens hood 1. The lever member 20 is configured to be rotatable around the rotation shaft 21.

[0107] The button 22 is provided with a biasing spring 24 as an example of the "second biasing portion" in the present invention. The biasing spring 24 is provided on the radially inner side of the lens hood 1 relative to the button 22. The biasing spring 24 biases the button 22 radially outwardly of the lens hood 1. As a result, the lever protrusion 23 disposed on the opposite side across the rotation axis 21 biases the lens hood 1 radially inwardly. When the button 22 is not in operation, it is in a state where it protrudes slightly outwardly from the outer peripheral surface of the lens hood 1 by the biasing force of the biasing spring 24 (for example, refer to FIG. 1 ). Figure 3 ) is set. The button 22 is an example of the "pressing part" in the present invention.

[0108] When the button 22 is not pressed, the lever protrusion 23 is urged radially inward of the lens hood 1 by the urging force of the urging spring 24. Therefore, the lever protrusion 23 urged radially inward is configured to engage with one end of the flange 53 of the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50. Furthermore, when the button 22 is pressed, the lever protrusion 23 is moved radially outward of the lens hood 1 by the rotation of the lever member 20. Therefore, the lever protrusion 23 moved radially outward is configured to separate from one end of the flange 53 of the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50. The lever protrusion 23 is an example of a "protrusion" in the present invention.

[0109] The length of the flange portion 53 of the interchangeable lens 50 is formed to be slightly shorter than the length between the rail stop portion 11 and the lever protrusion 23 of the rail portion 10. Therefore, when the lens hood 1 is mounted on the interchangeable lens 50 and the flange portion 53 is arranged along the rail portion 10 between the rail stop portion 11 and the lever protrusion 23, a small gap is provided as a mounting margin for the lens hood 1 between at least one of the one end portion of the flange portion 53 and the rail stop portion 11 or between the other end portion of the flange portion 53 and the lever protrusion 23.

[0110] When the lens hood 1 is mounted on the interchangeable lens 50 and the flange 53 is engaged (arranged) between the rail locking portion 11 and the lever protrusion 23, the lever protrusion 23 functions as a part of a restraining mechanism capable of restraining one end of the flange 53. In addition, the rail locking portion 11 functions as a part of a restraining mechanism capable of restraining the other end of the flange 53. When the lens hood 1 is mounted on the interchangeable lens 50, the lever protrusion 23 and the rail locking portion 11 restrain both ends of the flange 53.

[0111] The rod member 20 including the rod protrusion 23 and the guide rail locking portion 11 of the guide rail portion 10 is an example of a "constraint mechanism" in the present invention. The position of the rod member 20 where the rod protrusion 23 constrains one side end of the flange portion 53 is an example of the "first position" in the present invention. And, the position of the rod member 20 where the rod protrusion 23 releases the constraint of one side end of the flange portion 53 is an example of the "second position" in the present invention. In addition, the "first position" and the "second position" may also be opposite. The rod member 20 is displaced from the position of one side end of the constrained flange portion 53 to the position of releasing the constraint by pressing the button 22. When the button 22 is not pressed, the rod member 20 is maintained at the position of one side end of the constrained flange portion 53 by the force of the force spring 24.

[0112] Furthermore, an inclined surface 3a is formed on the outer peripheral surface of the hood connecting portion 3. The outer peripheral surface is a surface (outer surface) in the direction away from the optical axis X of the interchangeable lens 50. The inclined surface 3a is formed so that the diameter becomes smaller as it moves away from the hood main body 2, that is, toward the rear end of the lens hood 1. Furthermore, the filter operation window 40 provided on the hood connecting portion 3 is provided at a position offset by about 90 degrees from the position of the button 22 of the lever member 20 in the circumferential direction of the hood connecting portion 3.

[0113] Figure 6 1 is a diagram showing an example of the force applied from the hood connecting portion 3 to the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50 in the normal mounting manner. Figure 6 As shown in FIG. 1 , the urging members 12 a and 12 b of the hood connecting portion 3 apply urging forces F1 and F2 to the flange portion 53 of the interchangeable lens 50. Figure 6 In FIG. 1 , only the hood connection portion 3 is shown, and the interchangeable lens 50 located inside the hood connection portion 3 is omitted.

[0114] When the lens hood 1 is mounted on the interchangeable lens 50, that is, the flange 53 of the interchangeable lens 50 is engaged along the rail 10 of the lens hood 1 and the flange 53 is restrained between the rail stopper 11 and the lever protrusion 23, the force F1 is applied to the flange 53 from the force applying member 12a, and the force F2 is applied to the flange 53 from the force applying member 12b. The force applying member 12a applies the force F1 indicated by the arrow to the flange 53 in the radial direction of the rotation of the rail 10 (hood connecting portion 3) when the lens hood 1 is mounted on the interchangeable lens 50. Similarly, the force applying member 12b applies the force F2 to the flange 53 in the radial direction of the rotation of the rail 10 when the lens hood 1 is mounted on the interchangeable lens 50.

[0115] Furthermore, when two force applying members 12a and 12b are provided as in this example, as shown by arrows, the resultant force F1 of the force applying member 12a and the force F2 of the force applying member 12b are directed in the direction of the resultant force F3 in the radial direction of the rotation of the guide rail portion 10. The radial direction of the rotation of the guide rail portion 10 is, for example, in the direction parallel to the optical axis X (reference Figure 3 ) in the direction of the cross.

[0116] However, when the number of the force applying member provided on the guide rail portion 10 is, for example, one, the direction of the resultant force becomes the same direction as the force applying direction of the one force applying member. Figure 6In this way, when the number of force applying members is set to 1, in order to make the force direction consistent with the direction of the resultant force F3, the position of the force applying member 12e becomes Figure 6 In contrast, when there are multiple force-applying members, the direction of the resultant force of these forces only needs to be consistent with the direction of the resultant force F3, so the position where the force-applying member is set can be selected, and the degree of freedom in design is improved.

[0117] In addition, Figure 5 and Figure 6 In the embodiment, the screws 14 a , 14 b , and 14 c provided along the inner periphery of the hood connection portion 3 are a part of the screws used to attach the hood connection portion 3 to the hood body 2 .

[0118] Figure 7 1 is a diagram showing the hood connection portion 3 of the lens hood 1 mounted on the lens connection portion 52 of the interchangeable lens 50 in a normal manner. If the hood connection portion 3 is mounted on the lens connection portion 52 in a normal manner, Figure 7 As shown, the lever member 20 provided on the hood connecting portion 3 is rotated by the urging force of the urging spring 24, and the lever protrusion 23 of the lever member 20 is engaged with one end 53a of the flange portion 53 of the lens connecting portion 52. In the lever protrusion 23, the engaging corner portion 23a provided at the corner portion of the flange portion 53 side of the lever protrusion 23 is engaged with one end 53a of the flange portion 53.

[0119] When viewed from one side of the lens connecting portion 52, the direction in which the one end portion 53a of the flange portion 53 engages with the engaging corner portion 23a of the lever protrusion 23 is an engaging direction E1 indicated by an arrow when the lens connecting portion 52 is properly mounted. The engaging direction E1 and the direction of the resultant force F3 (see FIG. Figure 6 ), the direction of the resultant force F3 is the direction of the resultant force F1 generated by the force applying component 12a of the hood connecting portion 3 and the force F2 generated by the force applying component 12b.

[0120] Figure 8 1 is a diagram showing an example of a force applied from the hood connection portion 3 to the interchangeable lens 50 when the lens hood 1 is reversely mounted. Figure 8As shown, the forces F4 and F5 are applied to the flange 53 of the interchangeable lens 50 from the force applying members 12c and 12d of the hood connecting portion 3. In this way, when the lens hood 1 is reversely mounted on the interchangeable lens 50, the flange 53 of the interchangeable lens 50 is arranged along the region where the force applying members 12c and 12d of the lens hood 1 are provided. The force applying members 12c and 12d apply forces to both ends of one flange 53 of the interchangeable lens 50 inward in the radial direction of the lens hood 1. And at this time, the combined force of the force F4 of the force applying member 12c and the force F5 of the force applying member 12d becomes the combined force F6.

[0121] Fig. 9 1 is a diagram showing the hood connection portion 3 of the lens hood 1 mounted in reverse on the lens connection portion 52 of the interchangeable lens 50. If the hood connection portion 3 is mounted in reverse on the lens connection portion 52, Fig. 9 As shown, the lever member 20 provided on the hood connecting portion 3 is rotated by the urging force of the urging spring 24, and the lever protrusion 23 of the lever member 20 is engaged with the one end 53b of the flange portion 53 of the lens connecting portion 52. In the lever protrusion 23, the engaging corner portion 23c provided at the corner portion of the flange portion 53 side of the lever protrusion 23 is engaged with the one end 53b of the flange portion 53.

[0122] When viewed from one side of the lens connecting portion 52, the direction in which the one end portion 53b of the flange portion 53 engages with the engaging corner portion 23c of the lever protrusion 23 is an engaging direction E2 indicated by an arrow when reversely mounted. The engaging direction E2 and the direction of the resultant force F6 (see FIG. 2 ) are the same. Figure 8 ), the direction of the resultant force F6 is the direction of the resultant force F4 generated by the force applying component 12c of the hood connecting portion 3 and the force F5 generated by the force applying component 12d.

[0123] <Structure of the urging members 12a and 12b>

[0124] Fig.10 FIG. 1 is a diagram showing an example of a biasing member 12a provided on the rail portion 10 of the hood connecting portion 3. Fig.10 As shown, the force applying member 12a includes a force applying protrusion 121 and mounting arms 122 and 123 provided on both sides of the force applying protrusion 121. The force applying protrusion 121 is a portion for applying force to the flange portion 53 of the interchangeable lens 50. The mounting arms 122 and 123 are arms for mounting the force applying member 12a on the rail portion 10.

[0125] Fig.11 FIG. 1 is a diagram showing an example of a mounting recess 131 for mounting the biasing member 12a. Fig.11As shown in FIG. 1 , the mounting recess 131 is formed adjacent to the rail stopper 11 provided at one end of the rail portion 10. The mounting recess 131 is provided with mounting grooves 132 and 133 in the direction along the rail portion 10. The mounting arm portions 122 and 123 of the biasing member 12a are pressed into the mounting grooves 132 and 133, so that the biasing member 12a is mounted on the mounting recess 131. The biasing member 12a is mounted in a state where the biasing protrusion 121 protrudes further inward in the radial direction of the lens hood 1 than the inner peripheral surface of the rail portion 10.

[0126] <Structure of the rod member 20>

[0127] Fig.12 It is a perspective view showing an example of the lever member 20 as seen from the side where the lever protrusion 23 is provided. Fig.13 It is a perspective view showing an example of the lever member 20 as viewed from the side where the button 22 is provided.

[0128] Figure 5 The rod member 20 shown is Fig.12 and Fig.13 The rod member 20 is Fig.12 and Fig.13 The end of the rotation shaft 21 as seen in the figure is inserted into the shaft hole 13 of the hood connecting part 3 and is in the mounted state of the lever member 20. The lever member 20 is mounted so that the axial direction G of the rotation shaft 21 is along the direction of the optical axis X of the interchangeable lens 50.

[0129] like Fig.12 and Fig.13 As shown, the rod member 20 has a slope 26 formed on the surface away from the optical axis X of the interchangeable lens 50. The surface away from the optical axis X is the outer surface of the lens hood 1 in the radial direction. Fig.13 As shown, the surface on which the inclined surface 26 is formed is a surface on one side where the button 22 is provided in the lever member 20. The inclined surface 26 is an example of a "first inclined surface" in the present invention.

[0130] The inclined surface 26 is formed as an inclined surface whose distance from the optical axis X becomes shorter as it goes toward the first direction along the optical axis X, that is, an inclined surface where the thickness T of the rod member 20 becomes thinner. The first direction is, for example, a direction along the optical axis X and is a direction toward the side (rear end) opposite to the end (front end) of the lens hood 1. Specifically, the first direction is Fig.12 and Fig.13 The first direction is the direction of the end side (right side) of the rotating shaft 21 in the rod member 20 as viewed from the axial direction G. Figure 5The rod member 20 is shown in the direction of the shaft hole 13 in which the rotating shaft 21 is inserted. For example, the rod member 20 is processed so that the thickness T thereof is reduced by chamfering the surface in the direction away from the optical axis X.

[0131] Furthermore, the rotation axis 21 of the rod member 20 is provided on a concave fulcrum portion 25 formed on the rod member 20. The fulcrum portion 25 is a shape that is recessed in the direction along the optical axis X. Furthermore, the fulcrum portion 25 is a concave shape when viewed from a direction intersecting the optical axis X. The shape that is recessed in the direction along the optical axis X is a shape in which the width of the rod member 20 in the direction along the optical axis X in the fulcrum portion 25 is shorter than the width of the rod member 20 in other parts. For example, if the width of the rod member 20 in the area of ​​the fulcrum portion 25 is set to the rod width W2 and the width of the rod member 20 in the area other than the fulcrum portion 25 is set to the rod width W1, the relationship of W2<W1 is achieved. Therefore, as Fig.12 and Fig.13 As shown, the end of the rotating shaft 21 on one side fitted into the shaft hole 13 is accommodated in the concave fulcrum portion 25 and is arranged at a position recessed from the width end of the region of the rod width W1 in the rod member 20 .

[0132] And, if Fig.12 As shown, the lever protrusion 23 of the lever member 20 is formed of two protrusions (a first protrusion 223 and a second protrusion 224). The first protrusion 223 and the second protrusion 224 are provided so as to overlap in the direction of the rotation axis 21. The first protrusion 223 is a protrusion that engages with the flange 53 of the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50 in the normal state. The second protrusion 224 is a protrusion that engages with the flange 53 of the interchangeable lens 50 when the lens hood 1 is mounted on the interchangeable lens 50 in the reverse state.

[0133] like Figure 7 As described in the figure, the first protrusion 223 is provided with an engaging corner portion 23a that engages with one end portion 53a of the flange portion 53 when the lens hood 1 is mounted upright. Furthermore, the second protrusion 224 is provided with an engaging corner portion 23b that engages with one end portion of the flange portion 53 when the lens hood 1 is mounted reversely (not shown).

[0134] <Position of the biasing spring 24 relative to the button 22>

[0135] Fig.14 It is a cross-sectional view of the button 22 and the biasing spring 24 in the lever member 20 provided in the hood connecting portion 3 . Fig.14 The button 22 and the force spring 24 are, for example, cut along the surface including the optical axis X. Figure 5 The longitudinal section view of the button 22 and the force spring 24 in the shading cover connecting part 3 is shown. Fig.14As shown, the urging spring 24 is provided at a position where at least a portion of the urging spring 24 overlaps with the button 22 when viewed from the pressing direction H of the button 22 .

[0136] <Position of the Rotational Axis 21 of the Lever Member 20 with Respect to the Shade Connecting Portion 3>

[0137] Fig.15 2 is a cross-sectional view showing the position of the rotation axis 21 of the rod member 20 provided on the hood connecting portion 3. Fig.15 As shown, one end portion 21a of the rotating shaft 21 of the rod member 20 is inserted into the shaft hole 13 (refer to Figure 5 Furthermore, the other end portion 21 b of the rotating shaft 21 is embedded in the shaft hole 15 formed on the hood body 2 .

[0138] The rotating shaft 21 of the rod member 20 is disposed at a position where at least a portion of the rotating shaft 21 overlaps with the inclined surface 3a of the hood connecting portion 3 when viewed from the axial direction G of the rotating shaft 21. The rotating shaft 21 of the rod member 20 is disposed on the concave fulcrum portion 25 and is disposed in a state of being recessed relative to one end in the width direction of the rod member 20. Therefore, for example, Figure 5 As shown, when the rod part 20 is provided on the inner circumference of the hood connection part 3, even if the position of the rotating shaft 21 of the rod part 20 is set to overlap with the position of the inclined portion 3a where the space in the hood connection part 3 is narrowed, the shaft hole 13 of the hood connection part 3 supporting the end 21a of the rotating shaft 21 can be accommodated in the limited space in the narrowed inclined portion 3a. The hood connection part 3, or the hood body 2 and the hood connection part 3 are an example of the "hood part" in the present utility model. The inclined portion 3a is an example of the "second inclined portion" in the present utility model. In addition, Fig.13 The inclined direction of the inclined surface portion 26 in the lever member 20 described in the above is formed along the inclined direction of the inclined surface portion 3 a in the hood connecting portion 3 .

[0139] <Attachment of the lens hood 1 to the interchangeable lens 50>

[0140] The following describes a method for attaching the lens hood 1 to the interchangeable lens 50. First, the lens hood 1 is pressed into the interchangeable lens 50 along the optical axis X, and the hood connecting portion 3 of the lens hood 1 covers the outer peripheral side of the lens connecting portion 52 of the interchangeable lens 50. At this time, the lens hood 1 is pressed into the interchangeable lens 50 so that the guide portion 10 does not overlap the flange portion 53 of the interchangeable lens 50 in the circumferential direction of the lens hood 1.

[0141] Next, the lens hood 1 covered is rotated in the circumferential direction of the interchangeable lens 50. When the lens hood 1 is rotated, the flange 53 of the interchangeable lens 50 comes into contact with the lever protrusion 23 of the lens hood 1, and the lever protrusion 23 is pushed by the flange 53 and moves (retracts) outward in the radial direction of the lens hood 1. As a result, the rail portion 10 of the lens hood 1 slides and rotates along the flange 53 of the interchangeable lens 50. The lens hood 1 is rotated until the end of the flange 53 is locked with the rail locking portion 11 provided at the end of the rail portion 10, so that the rail portion 10 is arranged along the flange 53.

[0142] When the rail portion 10 is arranged along the flange portion 53, the lever member 20 rotates about the rotation axis 21 by the biasing force of the biasing spring 24, and the lever protrusion 23 moves radially inwardly of the lens hood 1. As a result, the engaging corner portion 23a of the lever protrusion 23 engages with the one end portion 53a of the flange portion 53 (see FIG. Figure 7 ). In this way, by engaging the engaging corner portion 23a of the lever protrusion 23 with the one end portion 53a of the flange portion 53, the flange portion 53, which is constrained with a gap between the guide rail stopper 11 or between the lever protrusion 23 as a mounting margin, is pressed and locked by the engaging corner portion 23a without a gap. As a result, the lens hood 1 can be prevented from shaking in the circumferential direction relative to the interchangeable lens 50.

[0143] Furthermore, one end portion 53a of the flange portion 53 is pressed (toward) by the engaging corner portion 23a of the lever protrusion 23. Figure 7 The flange 53 is pressed in the engagement direction E1) so that the force F1 is applied to the flange 53 from the force applying member 12a provided on the rail portion 10, and the force F2 is applied to the flange 53 from the force applying member 12b. As a result, a combined force F3 of the force F1 and the force F2 is applied to the interchangeable lens 50 in the radial direction of the rotation of the rail portion 10, so that the radial shaking of the lens hood 1 relative to the interchangeable lens 50 can be suppressed.

[0144] In addition, when removing the attached lens hood 1 from the interchangeable lens 50, the following procedure is followed. First, the button 22 is pressed. When the button 22 is pressed, the lever member 20 rotates around the rotation axis 21, the button 22 moves radially inward of the lens hood 1, and the lever protrusion 23 moves radially outward of the lens hood 1. As a result, the engagement of the lever protrusion 23 of the lever member 20 with the flange 53 of the interchangeable lens 50 is released, and the constraint of the flange 53 is released.

[0145] Then, the lens hood 1 is rotated in the opposite circumferential direction to that when it was attached. Thus, the rail portion 10 of the lens hood 1 slides and rotates along the flange portion 53 of the interchangeable lens 50 , and the lens hood 1 can be removed from the interchangeable lens 50 in the direction along the optical axis X.

[0146] The lens hood 1 mounted on the interchangeable lens 50 is usually formed to have a larger diameter than the interchangeable lens 50 to prevent the interchangeable lens 50 from blocking the camera angle. Therefore, the overall size of the lens hood 1 is also increased, and it is desired to be as simple as possible in terms of both appearance and user operability. Therefore, the inventors have achieved the simplification of the lens hood 1 (improvement in appearance) by improving the structure of the hood connecting portion 3 in the lens hood 1 connected to the interchangeable lens 50.

[0147] As described above, the lens hood 1 in this embodiment includes the rail portion 10 engaged with the flange portion 53 of the interchangeable lens 50 and the restraining mechanism for restraining both ends of the flange portion 53. The restraining mechanism includes the lever member 20, which can switch between restraint and release of the flange portion 53 according to the rotation state of the lens hood 1. In addition, the lever member 20 has an inclined surface 26 formed on the surface arranged on the outer side in the radial direction of the lens hood 1, and the shape of the fulcrum portion 25 provided with the rotation axis 21 is formed in a concave shape. In addition, the inclined surface 26 is formed along the inclination direction of the inclined surface 3a in the hood connecting portion 3.

[0148] According to this structure, the thickness of the rod member 20 can be reduced by forming the inclined surface 26 on the outer surface of the rod member 20. In addition, by forming the inclined direction of the inclined surface 26 along the inclined direction of the inclined surface 3a of the lens hood connecting portion 3, the rod member 20 can be effectively stored in the space inside the lens connecting portion 52 narrowed by the provision of the inclined surface 26. In addition, in order to compensate for the strength of the rod member 20 reduced by the thinning, the width of the rod member 20 (rod width W1) is widened, but the expansion of the rod member 20 in the width direction can be suppressed by arranging the rotation axis 21 of the rod member 20 in the concave fulcrum portion 25. Therefore, according to this structure, the rod member 20 can also be effectively stored in the space inside the lens connecting portion 52 narrowed by the provision of the inclined surface 26. Therefore, it is possible to provide a lens hood 1 that can achieve a good appearance and ensure strength.

[0149] Furthermore, in the case of a structure in which the lens hood 1 is mounted on the end of the interchangeable lens 50 in a bayonet-type manner, a certain clearance is required as a mounting margin, for example, between the end of the flange portion 53 of the interchangeable lens 50 and the rail stop portion 11 of the lens hood 1, or between the end of the flange portion 53 and the lever protrusion 23 of the lens hood 1, in order to facilitate mounting or prevent the shape deformation of the lens hood due to temperature changes. However, if a clearance is provided between the two components, when the lens hood is mounted on the interchangeable lens, the lens hood may wobble relative to the interchangeable lens due to the clearance. Therefore, it is required to provide a clearance as a mounting margin and to deal with the wobble of the lens hood during mounting.

[0150] In contrast, according to the lens hood 1 of the present embodiment, when the lens hood 1 is mounted on the interchangeable lens 50 and the flange portion 53 of the interchangeable lens 50 is constrained between the guide rail locking portion 11 and the rod protrusion 23 of the lens hood 1, a force F1 is applied to the flange portion 53 from the force applying component 12a, and a force F2 is applied to the flange portion 53 from the force applying component 12b.

[0151] Furthermore, in the case of normal installation, the direction of the resultant force F3 of the force F1 of the force applying member 12a and the force F2 of the force applying member 12b is configured to coincide with the engagement direction E1 of the engagement between the one end portion 53a of the flange portion 53 and the engagement angle portion 23a of the lever protrusion 23. In this way, by aligning the direction of the resultant force F3 of the force F1 and F2 with the engagement direction E1 of the flange portion 53 and the lever protrusion 23, it is possible to suppress the shaking of the lens hood 1 in the radial direction and the shaking in the circumferential direction (rotational direction) relative to the interchangeable lens 50. As a result, the close fit of the lens hood 1 relative to the interchangeable lens 50 can be improved.

[0152] Furthermore, in the case of reverse mounting, the direction of the resultant force F6 of the force F4 of the force member 12c and the force F5 of the force member 12d is configured to coincide with the engagement direction E2 of the engagement between the one end portion 53b of the flange portion 53 and the engagement angle portion 23c of the lever protrusion 23. In this way, by aligning the direction of the resultant force F6 of the force F4 and F5 with the engagement direction E2 of the flange portion 53 and the lever protrusion 23, the shaking of the lens hood 1 in the radial direction and the shaking in the circumferential direction (rotational direction) relative to the interchangeable lens 50 can be suppressed, similarly to the case of normal mounting. As a result, the close fit of the lens hood 1 relative to the interchangeable lens 50 can be improved.

[0153] Furthermore, according to the lens hood 1, when viewed from the pressing direction H of the button 22, the biasing spring 24 provided on the button 22 is provided at a position where at least a portion of the biasing spring 24 overlaps with the button 22. Therefore, it is easy to apply a pressing force when the button 22 is pressed to the biasing spring 24 in the pressing direction H, and, for example, compared with a case where the position of the button 22 and the position of the biasing spring 24 do not overlap when viewed from the pressing direction H, the shaking of the lever member 20 caused by the pressing of the button 22 can be suppressed.

[0154] <Modification>

[0155] In the above embodiment, the restraint mechanism including the lever member 20 is provided on one side of the lens hood 1, but the present invention is not limited thereto. The restraint mechanism may be provided on one side (lens device) of the interchangeable lens 50, for example. Figures 16 to 18 , a case where the restraint mechanism is provided on one side of the interchangeable lens 50 is described.

[0156] Fig.16 1 is a perspective view showing an example of an interchangeable lens 50 provided with a restraining mechanism. The restraining mechanism is provided on a lens connecting portion 52 mounted on the front end portion of the interchangeable lens 50. The lens connecting portion 52 can be attached to and detached from a lens barrel 51. An inclined portion 52a whose diameter gradually decreases as it approaches the lens barrel 51 is provided on the outer peripheral surface of the lens connecting portion 52. In the above-mentioned embodiment, the inclined portion 52a is an inclined portion equivalent to the inclined portion 3a provided on the hood connecting portion 3.

[0157] The lens connecting portion 52 is configured to be connected to the hood connecting portion 3 of the lens hood 1. Although not shown in the figure, the hood connecting portion 3 of the lens hood 1 is provided with flanges (engaged portions) at both ends of which are restrained by the restraining mechanism of the lens connecting portion 52. The flanges provided on the hood connecting portion 3 are, for example, the flanges of the embodiment described above. Figure 2 The flange portion 53 of the lens connecting portion 52 described in the specification has the same structure.

[0158] Fig.17 It is a perspective view showing the structure of the lens connecting portion 52 in the interchangeable lens 50 . Fig.18 yes Fig.17 The top view of the lens connecting portion 52 is shown. Fig.17 and Fig.18 Among the various parts of the lens connecting portion 52 shown in the figure, Figure 5 and Figure 6 The parts of the shading cover connecting portion 3 described above that have the same functions are denoted by the same reference numerals.

[0159] like Fig.17 and Fig.18As shown in FIG. 1 , a guide rail 10 engaging with the flange of the lens hood 1 and a restraining mechanism for restraining both ends of the flange of the lens hood 1 are provided on the inner periphery of the lens connecting portion 52. The restraining mechanism includes a lever member 20 that can switch between restraining and releasing the flange of the lens hood 1 by rotating around a rotation axis 21. The lever member 20 has an inclined surface 26 (see FIG. 26 ) formed along the inclined surface 52a of the lens connecting portion 52. Fig.13 ). Furthermore, the rotation axis 21 of the lever member 20 is provided in the fulcrum portion 25 formed in a concave shape.

[0160] Furthermore, the direction of the resultant force F3 of the force F1 of the force applying member 12a and the force F2 of the force applying member 12b is the radial direction of the rotation of the rail portion 10, and is consistent with the engagement direction E1 of the engagement between one end of the flange portion provided on the hood connecting portion 3 of the lens hood 1 and the lever protrusion 23 of the lever member 20. Therefore, even when the restraint mechanism is provided on one side of the interchangeable lens 50, the same effect as that of the lens hood 1 of the above-mentioned embodiment can be obtained.

[0161] Explanation of symbols

[0162] 1-lens hood, 2-hood body, 3-hood connection part, 3a, 26, 52a-inclined part, 10-rail part, 11-rail stopper, 12a~12e-force applying part, 13, 15-axis hole, 14a~14c-screw, 20-rod part, 21-rotation axis, 21a, 21b-end part, 22-button 23-rod protrusion 23a, 23b, 23c-engagement angle part 24-force applying spring, 25-fulcrum part 40-filter operation window 50-interchangeable lens, 51-lens barrel, 52-lens connecting part, 53-flange part, 53a, 53b-one end part, 121-force-applying protrusion, 122, 123-mounting arm part, 131-mounting recess, 132, 133-mounting groove, 223-first protrusion, 224-second protrusion, E1, E2-engaging direction, F1, F2, F4-force-applying, F3-combined force, W1, W2-rod width.

Claims

1. A lens accessory, mounted on a lens device, characterized in that: The lens attachment has: A clamping portion, clamped with the clamped portion of the lens device; and A restraining mechanism restrains the two ends of the engaged portion, The restraint mechanism includes a rod member, and the rod member can switch between the restraint and the release by rotating. The lever member has a first inclined surface formed on a surface in a direction away from the optical axis of the lens device, and the fulcrum portion of the rotation is concave.

2. The lens attachment according to claim 1, characterized in that: The rod member is provided on the shading cover member, and the shading cover member has a second inclined surface on a surface in a direction away from the optical axis. The fulcrum portion of the lever member is provided at a position where at least a portion overlaps with the second inclined surface portion when viewed from the rotation axis direction of the lever member.

3. The lens attachment according to claim 1, characterized in that: The first inclined surface portion has an inclined surface whose distance from the optical axis becomes shorter as it goes toward a first direction along the optical axis.

4. The lens attachment according to claim 3, characterized in that: The concave shape is a shape that is recessed in the direction along the optical axis.

5. The lens attachment according to claim 3, characterized in that: The concave shape is a concave shape when viewed from a direction intersecting the optical axis.

6. The lens attachment according to claim 1, characterized in that: The engaging portion is a bayonet structure, The lens attachment has one or more first force-applying parts, and the one or more first force-applying parts apply force to the engaged part in the radial direction of rotation of the bayonet structure in the engaged state. A direction of a resultant force of the urging forces of the one or more first urging parts includes a radial direction of rotation of the bayonet structure.

7. The lens attachment according to claim 6, characterized in that: The rod member has a protrusion, and the protrusion is engaged with one end of the engaged portion in the restrained state. The direction of the resultant force is a direction in which one end of the engaged portion is engaged with the protrusion in the restrained state.

8. The lens attachment according to claim 6, characterized in that: The one or more first biasing parts are a plurality of biasing parts.

9. The lens attachment according to any one of claims 1 to 8, characterized in that: The lever member has a pressing portion, and is displaced from the first position to the second position by pressing the pressing portion. The restraint mechanism includes a second biasing portion, and the second biasing portion maintains the rod member at the first position in the engaged state. The second biasing portion is provided at a position where at least a portion overlaps with the pressing portion when viewed from the pressing direction of the pressing portion.

10. A lens accessory, characterized in that: It has: An engaging portion of the bayonet structure engaged with the engaged portion of the lens device; A restraining mechanism, restraining two ends of the engaged portion; and One or more force-applying parts apply force to the engaged part in the radial direction of rotation of the bayonet structure in the engaged state, A direction of a resultant force of the one or more biasing parts is a radial direction of rotation of the bayonet structure.

11. A lens device, characterized in that: It has: A clamping portion, which is clamped with a clamped portion of the lens accessory; and A restraining mechanism restrains the two ends of the engaged portion, The restraint mechanism includes a rod member, and the rod member can switch between the restraint and the release by rotating. The lever member has an inclined surface formed on a surface in a direction away from the optical axis, and the fulcrum portion of the rotation has a concave shape.

12. A lens device, characterized in that: It has: An engaging portion of the bayonet structure engaged with an engaged portion of the lens accessory; A restraining mechanism, restraining two ends of the engaged portion; and One or more force-applying parts apply force to the engaged part in the radial direction of rotation of the bayonet structure in the engaged state, A direction of a resultant force of the one or more biasing parts is a radial direction of rotation of the bayonet structure.

Images