Rotation restricting mechanism and lens device

Abstract

To provide a rotation restricting mechanism and a lens device capable of suppressing rotation of an operation ring while reducing the influence on an optical system.SOLUTION: A rotation restricting mechanism 100 is a rotation restricting mechanism for an operation ring 5 that is rotatable around an optical axis L on the outer circumference of a fixed barrel 13 for fixing an optical system. The rotation restricting mechanism 100 includes: a fastening member 7 provided on the operation ring 5, having a movement stroke in a direction intersecting the optical axis L and a biasing portion at a tip; an intermediate barrel 11 for restricting rotation of the operation ring 5 by being pressed by the biasing portion; and a plurality of fixing members 25 for fixing the intermediate barrel 11 to the fixed barrel 13. The plurality of fixing members 25 fix the intermediate barrel 11 in a state where a gap is provided between the intermediate barrel 11 and the fixed barrel 13, and fix the intermediate barrel 11 to be movable in the direction intersecting the optical axis L relative to the fixed barrel 13.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a rotation suppression mechanism and a lens device, and more particularly to a rotation suppression mechanism for an operating ring and a lens device equipped with the rotation suppression mechanism. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a lens device in which a tripod mount is attached to a lens barrel is known.

[0003] For example, Patent Document 1 describes a lens device having a lens barrel with a tripod mount attached. The lens device in Patent Document 1 has a mechanism that tightens an annular member that contacts the outer periphery of the lens barrel in the optical axis direction to suppress rotation of the annular member relative to the lens barrel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-76052 Summary of the Invention

[0005] One embodiment of the technique of the present disclosure provides a rotation suppression mechanism and a lens device that can suppress rotation of an operation ring while reducing the impact on the optical system. [Means for solving the problem]

[0006] The first aspect of the rotation suppression mechanism of the present invention is a rotation suppression mechanism for an operating ring that can rotate around the optical axis around the outer periphery of a fixed barrel that fixes the optical system, and includes: a tightening member that is provided on the operating ring and has a moving stroke in a direction intersecting the optical axis and has a spring portion at its tip; an intermediate barrel that suppresses the rotation of the operating ring by pressure from the spring portion; and a plurality of fixing members that fix the intermediate barrel to the fixed barrel, wherein the plurality of fixing members fix the intermediate barrel with a gap between the intermediate barrel and the fixed barrel, and fix the intermediate barrel to the fixing members so that it can move in a direction intersecting the optical axis.

[0007] A second aspect of the present invention is the rotation suppression mechanism of the first aspect, wherein the plurality of fixing members are configured in a cylindrical shape and are arranged with their central axes facing in a direction intersecting the optical axis.

[0008] A third aspect of the present invention is the rotation suppression mechanism of the first aspect, wherein the gap is larger than the amount of displacement of the diameter of the intermediate cylinder in a direction intersecting the optical axis when the movement stroke is at its maximum.

[0009] A fourth aspect of the present invention is the rotation suppression mechanism of the first aspect, wherein the intermediate cylinder is configured with a first region having a gap and a second region that contacts the fixed cylinder.

[0010] In a fifth aspect of the present invention, in the rotation suppression mechanism of the first aspect, the intermediate cylinder is located between the body fitting diameter of the mount portion and the maximum diameter of the mount portion.

[0011] In a sixth aspect of the present invention, in the rotation suppression mechanism of the first aspect, the plurality of fixing members are made up of a first fixing member and a second fixing member made of a material different from that of the first fixing member.

[0012] A seventh aspect of the present invention is a rotation suppression mechanism of the sixth aspect, wherein the first contact portion of the first fixed member that contacts the intermediate tube is made of resin, and the second contact portion of the second fixed member that contacts the intermediate tube is made of metal.

[0013] In an eighth aspect of the present invention, in the rotation suppression mechanism of the seventh aspect, the second contact portion and the intermediate cylinder come into contact with each other when a specified load is applied to the first contact portion.

[0014] In a ninth aspect of the present invention, in the rotation suppression mechanism of the first aspect, the plurality of fixing members are made up of two fixing members positioned rotationally asymmetrically with respect to the optical axis.

[0015] In a tenth aspect of the present invention, in the rotation suppression mechanism of the first aspect, the plurality of fixing members are made up of three fixing members.

[0016] In an eleventh aspect of the present invention, in the rotation suppression mechanism of the first aspect, the plurality of fixing members are positioned between the contact portion of the operation ring and the intermediate cylinder.

[0017] In a twelfth aspect of the present invention, in the rotation suppression mechanism of the first aspect, the operation ring has a connection portion for connecting to a tripod mount.

[0018] A lens device according to a thirteenth aspect of the present invention includes the rotation suppression mechanism according to any one of the first to eleventh aspects. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is an external view of a lens device equipped with a rotation suppression mechanism. [Figure 2] FIG. 2 is a cross-sectional view of the lens device. [Figure 3] FIG. 3 is an enlarged view of region II shown in FIG. [Figure 4] FIG. 4 is an enlarged view of the fixing member shown in FIG. [Figure 5] FIG. 5 is a cross-sectional view of the lens device. [Figure 6] FIG. 6 is a diagram showing a part of a cross section of the lens device taken along the YZ plane. [Figure 7] FIG. 7 is a diagram showing a part of a cross section of the lens device taken along the YZ plane. [Figure 8]FIG. 8 is a cross-sectional view of the lens device. [Figure 9] FIG. 9 is a cross-sectional view of the lens device. [Figure 10] FIG. 10 is a cross-sectional view of the lens device. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a rotation suppression mechanism and a lens device according to the present invention will now be described with reference to the accompanying drawings.

[0021] First, a conventional rotation suppression mechanism will be described.

[0022] Conventionally, there has been known a rotation suppression mechanism for suppressing rotation of a tripod seat ring by tightening the knob of the tripod seat ring of a lens device, thereby increasing the frictional force against the lens barrel. However, with conventional rotation suppression mechanisms, when the knob is tightened too much to fully exert the rotation suppression function of the tripod seat ring, the biasing force generated by tightening the knob can reach the optical member fixing barrel that holds the optical member. If this biasing force reaches the optical member fixing barrel, the positional relationship of the optical system held by the optical member fixing barrel changes, resulting in a problem of degraded resolution performance of the lens device.

[0023] Therefore, in the rotation suppression mechanism of the present invention, an intermediate tube is provided between the tripod seat ring and the optical member fixing tube, and radial deformation of the intermediate tube (loss of circularity) caused by the biasing force from tightening the knob is absorbed by the gap between the intermediate tube and the optical member fixing tube, preventing deformation of the intermediate tube from causing deformation of the optical member fixing tube. As a result, the rotation suppression mechanism 100 of the present invention can suppress changes in the positional relationship of the optical system held in the optical member fixing tube 13, and suppress deterioration of resolution performance.

[0024] The rotation suppression mechanism of the present invention will be described in detail below.

[0025] 1 is an external view of a lens device equipped with a rotation suppression mechanism of the present invention, in which an optical axis L is indicated.

[0026] A camera body (not shown) is attached to the lens device 1 via a mount 33, and photographs of a subject are taken. The lens device 1 has a tripod seat ring (operation ring) 5 attached to a lens barrel 9. The tripod seat ring 5 is rotatable around the optical axis L on the outer periphery of an optical member fixing barrel 13 (see FIG. 2). The lens device 1 is equipped with a rotation suppression mechanism 100 (see FIG. 2) that suppresses rotation of the tripod seat ring 5.

[0027] The lens device 1 connects to the tripod mount 3 via a tripod mount ring 5. The tripod mount ring 5 has a connection portion 5a for connecting to the tripod mount 3. In this example, the tripod mount ring 5 and the tripod mount 3 are described as being detachable, but the tripod mount ring 5 and the tripod mount 3 may also be integrated. Also, in this example, a lens device 1 is described in which a tripod is attached to the connection portion 3a of the tripod mount 3, but the application of the present invention is not limited to this example. For example, the present invention can also be applied to a lens device 1 supported on a monopod rather than a tripod. The present invention can also be applied to any accessory that can be fixed to the lens device 1, without any particular limitation.

[0028] The tripod seat ring 5 is prevented from rotating relative to the lens barrel 9 (or intermediate barrel 11) by tightening a knob (tightening member) 7 that constitutes part of the rotation suppression mechanism 100.

[0029] (First embodiment) FIG. 2 is a cross-sectional view of the lens device 1 described in FIG. 1. FIG. 2 is a view showing the II cross section (cross section on the XY plane) shown in FIG. 1. Note that FIG. 2 shows only the members necessary for explaining the rotation suppression mechanism 100 of the present invention, and other members are omitted. Also, FIG. 2 omits detailed illustration of the internal structure of the knob 7. FIG. 3 is an enlarged view of region II shown in FIG. 2, and FIG. 4 is an enlarged view III of the fixing member (first fixing member) 25 shown in FIG. 2.

[0030] The rotation suppression mechanism 100 provided in the lens device 1 suppresses rotation around the optical axis of the outer periphery of the optical member fixing barrel 13 of the tripod seat ring 5. The rotation suppression mechanism 100 is composed of the knob 7, the intermediate barrel 11, a fixing bush (fixing member) 23, and a fixing screw (fixing member) 21.

[0031] As shown in FIG. 2, an intermediate tube 11 is provided between the tripod seat ring 5 and the optical member fixing tube 13. The optical member fixing tube 13, not shown, fixes (holds) the optical system of the lens device 1. The intermediate tube 11 is pressed by a biasing member 35 (see FIG. 3) provided at the tip of a knob 7 provided on the tripod seat ring 5, and the frictional force between the biasing member 35 and the knob 7 restricts rotation of the tripod seat ring 5. The knob 7 is provided on the tripod seat ring 5. When the knob 7 is rotated, it moves linearly by a screw feed mechanism 7a fixed to the tripod seat ring 5, and has a movement stroke Q in a direction intersecting the optical axis L (see FIG. 3). The biasing member 35 provided at the tip of the knob 7 applies a biasing force F to the intermediate tube 11. For example, the biasing member 35 is made of resin. The stronger the biasing force F, the stronger the frictional force generated between the biasing member 35 and the intermediate tube 11, thereby reliably restricting rotation of the tripod seat ring 5. On the other hand, intermediate tube 11 may be deformed by receiving this biasing force F (see, for example, FIG. 5). Therefore, in rotation suppression mechanism 100, a gap W (see FIG. 4) is provided between intermediate tube 11 and optical member fixing barrel 13 to prevent deformation of intermediate tube 11 from affecting optical member fixing barrel 13. For example, when movement stroke Q of knob 7 is at its maximum, gap W is provided so that it is larger than the amount of displacement of the diameter of intermediate tube 11 in a direction intersecting optical axis L. Enlarged view III in FIG. 4 shows gap W between intermediate tube 11 and optical member fixing barrel 13, and gap W is, for example, 0.1 mm or more.

[0032] Intermediate barrel 11 is provided with three fixing members 25a to 25c, with a gap W between intermediate barrel 11 and optical member fixing barrel 13. In the following description, each fixing member will be referred to as fixing members 25a to 25c, and all fixing members will be referred to as fixing member 25. The same applies to the other multiple members.

[0033] The fixing member 25 is composed of a fixing bushing 23 and a fixing screw 21. The three fixing members 25a to 25c are evenly arranged around the optical axis L. That is, the three fixing members 25a to 25c are arranged so that the central angle between them is 120° around the optical axis L. By fixing at three or more points using the fixing members 25 in this way, the fixing members 25 can be evenly arranged around the optical axis L. Furthermore, by evenly arranging the fixing members 25 around the optical axis L in this way, it is advantageous in terms of load resistance and breakage of the fixing members 25 can be suppressed.

[0034] Fixed member 25a fixes intermediate tube 11 so that it has a degree of freedom in the radial direction Ra of intermediate tube 11. Fixed member 25b fixes intermediate tube 11 so that it has a degree of freedom in the radial direction Rb of intermediate tube 11. Fixed member 25c fixes intermediate tube 11 so that it has a degree of freedom in the radial direction Rc of intermediate tube 11. In other words, fixed member 25 fixes intermediate tube 11 to be movable relative to fixed member 25 in a direction intersecting with optical axis L. Specifically, fixed bushing 23 has a cylindrical shape, and the central axis of the cylinder is arranged facing in a direction intersecting with the optical axis L, so that intermediate tube 11 and fixed bushing 23 can slide in the direction of arrow S (see FIG. 4). This allows the fixing member 25 to hold the intermediate tube 11 so as to provide a gap W between it and the optical member fixing tube 13, and when the intermediate tube 11 is deformed by the biasing force F of the biasing portion 35 due to the tightening of the knob 7, sliding occurs between the fixing bush 23 and the intermediate tube 11, causing the intermediate tube 11 to deform.

[0035] Next, a description will be given of deformation of the intermediate cylinder 11 due to the biasing force F from the biasing portion 35 when the knob 7 is tightened.

[0036] FIG. 5 is a cross-sectional view of the lens device 1 described in FIG. 1, illustrating deformation of the intermediate barrel 11. In FIG.

[0037] When the knob 7 is tightened, a biasing force F acts on the intermediate tube 11. The intermediate tube 11 is then affected by the biasing force F and deforms. At the location of the arrow Pa, the intermediate tube 11 deforms so as to contract in the radial direction. At the location of the arrow Pb, the intermediate tube 11 deforms so as to contract in the radial direction. At the location of the arrow Pc, the intermediate tube 11 deforms so as to expand in the radial direction. In this way, when the intermediate tube 11 is subjected to the biasing force F, if there is a degree of freedom in the radial direction in the fixing members 25a to 25c, the shape changes from circular to elliptical, and if there is a gap W, the deformation of the intermediate tube 11 can be prevented from extending to the optical member fixing tube 13.

[0038] As described above, according to rotation suppression mechanism 100 of the present invention, even when knob 7 is tightened, intermediate tube 11 is fixed at fixing portion 25 with gap W between intermediate tube 11 and optical member fixing tube 13 so that intermediate tube 11 has a degree of freedom in the radial direction, and therefore, even if intermediate tube 11 deforms, it is possible to prevent the deformation from extending to optical member fixing tube 13. Therefore, rotation suppression mechanism 100 of the present invention can suppress changes in the positional relationship of the optical system held in optical member fixing tube 13 and suppress deterioration of resolution performance.

[0039] (Second embodiment) Next, a second embodiment of the present invention will be described. In this embodiment, the intermediate barrel 11 has an area at its end where the intermediate barrel 11 comes into contact with the optical member fixing barrel 13.

[0040] Fig. 6 is a diagram showing a portion of the cross section of the lens device 1 shown in Fig. 1 taken along the YZ plane, and is a diagram showing the intermediate barrel 11 and the optical member fixing barrel 13 of this embodiment. Note that Fig. 6 shows a portion above the optical axis L.

[0041] 6, intermediate barrel 11 has a first region M having a gap W between it and optical member fixing barrel 13, and a second region N in contact with optical member fixing barrel 13. Here, first region M is a region that deforms due to the biasing force F of biasing portion 35 described above, and by having gap W between it and optical member fixing barrel 13, deformation of intermediate barrel 11 is prevented from affecting optical member fixing barrel 13. On the other hand, second region N is in contact with optical member fixing barrel 13, which prevents misalignment when fixing bushing 23 is inserted and can prevent deformation of optical member fixing barrel 13 during assembly.

[0042] As described above, in this embodiment, intermediate barrel 11 has an area where it is in contact with optical member fixing barrel 13 and an area having gap W. This prevents deformation of intermediate barrel 11 from affecting optical member fixing barrel 13, while also preventing misalignment when fixing bushing 23 is inserted, thereby preventing deformation of optical member fixing barrel 13 during assembly.

[0043] (Third embodiment) Next, a third embodiment of the present invention will be described. In this embodiment, intermediate barrel 11 is located between the camera body (body) fitting diameter a of mount portion 33 and the maximum diameter b of mount portion 33.

[0044] Fig. 7 is a diagram showing a part of the cross section of the lens device 1 shown in Fig. 1 taken along the YZ plane, and is a diagram showing the intermediate barrel 11 of this embodiment. Note that Fig. 7 shows the portion above the optical axis L.

[0045] 7, in this embodiment, the intermediate tube 11 is located between the body fitting diameter a of the mount section 33 and the maximum diameter b of the mount section 33. Here, the body fitting diameter a is the distance between the end of the portion where the body attached to the mount section 33 is fitted and the optical axis L. Furthermore, the maximum diameter b is the distance between the end of the portion of the mount section 33 that has the largest radius and the optical axis L. In this way, since the intermediate tube 11 is located between the body fitting diameter a of the mount section 33 and the maximum diameter b of the mount section 33, the rotation suppression mechanism 100 can be made smaller.

[0046] 7, the fixing member 25 is preferably positioned between the contact portions 11a and 11b of the intermediate tube 11 and the tripod seat ring 5. When the intermediate tube 11 and the tripod seat ring 5 are only partially in contact, the fixing member 25 is preferably positioned so as to be sandwiched between the contact portions 11a and 11b, as shown in FIG. 7. This allows the biasing force F to be applied stably to the intermediate tube 11, and also allows the fixing member 25 to stably fix the intermediate tube 11.

[0047] (Fourth embodiment) Next, a fourth embodiment of the present invention will be described. This embodiment has reinforcing fixing pins (second fixing members) 31a to 31b.

[0048] FIG. 8 is a cross-sectional view of the lens device 1, illustrating a rotation suppression mechanism 100 according to the fourth embodiment.

[0049] The rotation suppression mechanism 100 of this embodiment is made up of the knob 7, the intermediate cylinder 11, fixing members 25a to 25c, and reinforcing fixing pins 31a to 31c.

[0050] The reinforcing fixing pins 31a to 31c are arranged at equal intervals on a circle centered on the optical axis L. That is, the reinforcing fixing pins 31a to 31c are arranged so as to form a central angle of 120° about the optical axis L. Furthermore, the reinforcing fixing pins 31a to 31c are arranged at positions different from the fixing member 25. Specifically, the fixing members 25a to 25c and the reinforcing fixing pins 31a to 31c are arranged so that the radial directions Ra, Rb, and Rc are different from the radial directions Va, Vb, and Vc. This enables the intermediate barrel 11 to be fixed more stably.

[0051] It is preferable that the reinforcing fixing pins 31a to 31c are made of a material different from that of the fixing bushing 23 that constitutes the fixing member 25. For example, if the fixing bushing 23 is made of resin, the reinforcing fixing pin 31 is made of metal. This allows the reinforcing fixing pin to stably fix the intermediate cylinder 11 even when a large force is applied to the intermediate cylinder 11.

[0052] It is preferable that the contact portions (second contact portions) 37 (see enlarged view IV in FIG. 8) of the reinforcing fixing pins 31a-31c are arranged so as to come into contact with the intermediate tube 11 when a specified load is applied to the contact portions (first contact portions) between the fixed bushing 23 and the intermediate tube 11. Specifically, as shown in enlarged view IV, the reinforcing fixing pins 31a-31b are provided with a small gap between them and the intermediate tube 11. This prevents large deformation of the fixing member 25, thereby suppressing rattle of the tripod seat ring 5.

[0053] (Fifth embodiment) Next, a fifth embodiment of the present invention will be described. In this embodiment, two fixing members 25 are provided.

[0054] Fig. 9 is a cross-sectional view of the lens device 1 described in Fig. 1, illustrating the rotation suppression mechanism 100 of this embodiment. Fig. 10 is a cross-sectional view of the lens device 1 described in Fig. 1, illustrating the case where one fixing member is provided.

[0055] The rotation suppression mechanism 100 is composed of the knob 7, the intermediate cylinder 11, and the fixing members 25a and 25b.

[0056] The two fixing members 25a and 25b are composed of two fixing members 25 that are positioned rotationally asymmetric with respect to the optical axis L. In other words, the fixing members 25a and 25b are arranged so that they have a positional relationship that prevents the two fixing members from overlapping at the same time even when rotated (<360°) around the optical axis L. This allows the two fixing members 25 to geometrically restrict the position of the intermediate tube 11, and enables the intermediate tube 11 to be fixed to the optical member fixing tube 13.

[0057] Furthermore, when one fixing member 25a is arranged as shown in Figure 10, there are degrees of freedom (two degrees of freedom) in the directions D1 and D2, so the intermediate tube 11 cannot be fixed to the optical member fixing tube 13.

[0058] As described above, according to this embodiment, even the two fixing members 25a and 25b are arranged in a rotationally asymmetric relationship, so that the intermediate barrel 11 can be fixed to the optical member fixing barrel 13.

[0059] (Addendum) It should be noted that the present disclosure also includes the following inventions.

[0060] (Aspect 1) A rotation suppression mechanism for an operation ring that can rotate around an optical axis on the outer periphery of a fixed barrel that fixes an optical system, a clamping member provided on the operation ring, having a movement stroke in a direction intersecting the optical axis, and having a biasing portion at a tip end; an intermediate cylinder that suppresses rotation of the operating ring by pressure from the biasing portion; a plurality of fixing members for fixing the intermediate barrel to the fixed barrel; and A rotation suppression mechanism in which the multiple fixing members fix the intermediate tube with a gap between the intermediate tube and the fixed tube, and fix the intermediate tube to the fixing members so that it can move in a direction intersecting the optical axis.

[0061] (Aspect 2) The rotation suppression mechanism according to embodiment 1, wherein the plurality of fixing members are cylindrical and have central axes that are oriented in a direction that intersects with the optical axis.

[0062] (Aspect 3) 3. The rotation suppression mechanism according to aspect 1 or 2, wherein the gap is larger than the amount of displacement of the diameter of the intermediate tube in the direction intersecting the optical axis when the movement stroke is at its maximum.

[0063] (Aspect 4) A rotation suppression mechanism according to any one of aspects 1 to 3, wherein the intermediate cylinder is configured with a first region having a gap and a second region that contacts the fixed cylinder.

[0064] (Aspect 5) A rotation suppression mechanism according to any one of aspects 1 to 4, wherein the intermediate cylinder is located between the body fitting diameter of the mount portion and the maximum diameter of the mount portion.

[0065] (Aspect 6) The plurality of fixing members include: a first fixing member; A rotation suppression mechanism according to any one of aspects 1 to 5, wherein the rotation suppression mechanism is configured with a second fixing member made of a material different from that of the first fixing member.

[0066] (Aspect 7) A rotation suppression mechanism according to aspect 6, wherein the first fixing member has a first contact portion that contacts the intermediate cylinder and is made of resin, and the second fixing member has a second contact portion that contacts the intermediate cylinder and is made of metal.

[0067] (Aspect 8) A rotation suppression mechanism according to aspect 7, wherein the second contact portion and the intermediate cylinder come into contact with each other when a specified load is applied to the first contact portion.

[0068] (Aspect 9) A rotation suppression mechanism according to any one of aspects 1 to 8, wherein the plurality of fixing members are configured with two fixing members positioned rotationally asymmetrically with respect to the optical axis.

[0069] (Aspect 10) A rotation suppression mechanism according to any one of aspects 1 to 9, wherein the plurality of fixing members are composed of three fixing members.

[0070] (Aspect 11) 11. The rotation suppression mechanism according to any one of aspects 1 to 10, wherein the plurality of fixing members are located between a contact portion between the operation ring and the intermediate cylinder.

[0071] (Aspect 12) 12. The rotation suppression mechanism according to any one of aspects 1 to 11, wherein the operation ring has a connection portion for connection to a tripod mount.

[0072] (Aspect 13) A lens device including the rotation suppression mechanism according to any one of aspects 1 to 11.

[0073] Although examples of the present invention have been described above, it goes without saying that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the present invention. [Explanation of symbols]

[0074] 1: Lens device 3: Tripod mount 5: Tripod mount ring 7: Knob 9: Lens barrel 11: Intermediate tube 13: Optical component fixing tube 21: Fixing screw 23: Fixed bush 25: Fixing member 31: Reinforcement fixing pin 33: Mounting section 35: biasing part 37: Contact area 100: Rotation suppression mechanism

Claims

1. A rotation suppression mechanism for an operation ring that can rotate around an optical axis on the outer periphery of a fixed barrel that fixes an optical system, a clamping member provided on the operation ring, having a movement stroke in a direction intersecting the optical axis and having a biasing portion at a tip end thereof; an intermediate cylinder that suppresses rotation of the operation ring by pressure from the biasing portion; a plurality of fixing members for fixing the intermediate barrel to the fixed barrel; and The plurality of fixing members fix the intermediate tube with a gap between the intermediate tube and the fixed tube, and fix the intermediate tube to the fixing members so that the intermediate tube can move in a direction intersecting the optical axis.

2. The rotation suppression mechanism according to claim 1 , wherein the plurality of fixing members are cylindrical and have central axes that are arranged in a direction that intersects with the optical axis.

3. 2. The rotation suppression mechanism according to claim 1, wherein the gap is larger than a displacement of a diameter of the intermediate tube in a direction intersecting the optical axis when the movement stroke is at a maximum.

4. 2. The rotation suppression mechanism according to claim 1, wherein the intermediate barrel is configured with a first region having the gap and a second region that contacts the fixed barrel.

5. 2. The rotation suppression mechanism according to claim 1, wherein the intermediate cylinder is located between a body fitting diameter of the mount portion and a maximum diameter of the mount portion.

6. The plurality of fixing members include: a first fixing member; 2. The rotation suppression mechanism according to claim 1, wherein the rotation suppression mechanism is configured with a second fixing member made of a material different from that of the first fixing member.

7. The rotation suppression mechanism according to claim 6, wherein the first fixed member has a first contact portion that contacts the intermediate cylinder and is made of resin, and the second fixed member has a second contact portion that contacts the intermediate cylinder and is made of metal.

8. The rotation suppression mechanism according to claim 7 , wherein the second contact portion and the intermediate cylinder come into contact with each other when a specified load is applied to the first contact portion.

9. The rotation suppression mechanism according to claim 1 , wherein the plurality of fixing members are formed by two fixing members positioned rotationally asymmetrically with respect to the optical axis.

10. The rotation suppression mechanism according to claim 1 , wherein the plurality of fixing members are composed of three fixing members.

11. The rotation suppression mechanism according to claim 1 , wherein the plurality of fixing members are positioned between contact portions of the operation ring and the intermediate cylinder.

12. The rotation suppression mechanism according to claim 1 , wherein the operation ring has a connection portion for connecting to a tripod mount.

13. A lens device comprising the rotation suppression mechanism according to claim 1 .

Images