JP6750222B2 - Lens barrel and optical equipment - Google Patents

Description

The present invention relates to a lens barrel and an optical device.

Most interchangeable lenses in recent lens-interchangeable cameras are compatible with autofocus, but it is also required to be compatible with manual focus for performing focusing by an operation of a photographer.
For such a problem, an interchangeable lens as described in Patent Document 1 has been proposed. In the interchangeable lens of Patent Document 1, an MF ring for manual focus is provided on the outer periphery of the interchangeable lens, and when the MF ring is rotationally operated by the photographer, its rotation direction and rotation amount are detected, and the detection result is obtained. Based on the above, the focus lens is drive-controlled.

JP, 2013-134408, A

One aspect of the present invention includes a first cylinder, an annular portion rotatable along a circumferential direction of the first cylinder, and a first annular portion parallel to the central axis of the first cylinder from the annular portion. And a light emitting portion and a light receiving portion that are arranged to face each other in the radial direction of the first cylinder, and the first protruding portion has a first protruding portion. A position detection unit that detects rotation of the rotating member with respect to the first cylinder by passing between the light emitting unit and the light receiving unit, and extends in a direction parallel to the first direction, A first tubular member arranged inside the barrel, and a second protrusion that projects radially outward from the first tubular member through a first opening provided in the first barrel. And a second cylinder having a second cylinder, the end of the rotating member on the second direction side opposite to the first direction is the second cylinder from the end on the second direction side of the first cylinder. direction side near is, the first cylinder, said provided second direction, and a flange portion in which the second opening is provided with projecting outward continuously from said second opening A concave portion having a first portion extending along the outer peripheral surface and a second portion having a width in the circumferential direction wider than the first portion at the tip of the first portion. An annular member arranged on the second direction side of the first cylinder, provided with a pair of engaging portions extending to the first cylinder side, each of the pair of engaging portions having a claw at its tip. And the pawl portion is engaged with the second portion and is fixed immovably in the optical axis direction with respect to the first cylinder, so that the rotating member is fixed to the first cylinder. a lens barrel Ru comprising a pressing member for holding.
Another aspect of the present invention is a first cylinder, an annular portion rotatable along the circumferential direction of the first cylinder, and a central axis of the first cylinder connected to the annular portion. A rotating member provided with a first protrusion protruding in a first direction parallel to the first direction, and a light emitting unit and a light receiving unit arranged to face each other in the radial direction of the first cylinder. The protrusion of passes through between the light emitting unit and the light receiving unit, and a position detecting unit that detects rotation of the rotating member with respect to the first cylinder, and extends in a direction parallel to the first direction. A first tubular member disposed inside the first tubular member, and a second tubular member that projects radially outward from the first tubular member through a first opening provided in the first tubular member. A second cylinder having a protrusion of, and the position detector is arranged at an end of the first cylinder on the second direction side opposite to the first direction, and the first cylinder is A flange portion that is provided on the second direction side and that extends outward and is provided with a second opening portion; and a first portion that continuously extends from the second opening portion along the outer peripheral surface; A concave portion having a second portion having a width in the circumferential direction wider than the first portion at the tip of the first portion, and further to the second direction side of the first cylinder with the rotating member interposed therebetween. A pair of engaging portions extending toward the first cylinder is provided on the arranged annular member, and each of the pair of engaging portions has a claw portion at a tip thereof, and the claw portion is the second claw portion. is engaged with the portion, by being immovably fixed in the optical axis direction with respect to the first cylinder, is a lens barrel Ru comprising a pressing member for holding the rotating member to the first tubular ..
In still another aspect of the present invention, a first cylinder, an annular portion rotatable along the circumferential direction of the first cylinder, and the annular portion parallel to the central axis of the first cylinder. And a light emitting portion and a light receiving portion that are arranged to face each other in the radial direction of the first cylinder, and the first protrusion is provided. A portion that passes between the light emitting portion and the light receiving portion, and a position detecting portion that detects rotation of the rotating member with respect to the first cylinder; and a portion that extends in a direction parallel to the first direction. A first tubular member disposed inside the first tubular member; and a second protrusion that projects radially outward from the first tubular member through an opening provided in the first tubular member. The first cylinder has a second cylinder and a second cylinder member provided with a groove to be fitted with the second protrusion and extending in a direction parallel to the central axis of the first cylinder. A third cylinder arranged outside the cylinder;
It is a lens barrel equipped with.
Another aspect of the present invention is an optical device including the lens barrel.

3 is a cross-sectional view of the lens barrel 1. FIG. FIG. 3 is an exploded perspective view of a main part of the lens barrel 1. It is a figure which shows the relationship between the flange part 36 of the fixed cylinder 31, and the 5th group cam follower 45a. FIG. 6 is a diagram showing a relationship between a flange portion 36 of the fixed barrel 31 and a moving barrel cam follower 61. FIG. 6 is an enlarged view of an MF ring 70 portion of the lens barrel 1. FIG. 7 is an enlarged view of an MF ring 70 portion of the lens barrel 1, showing a state in which an MF ring holding portion described later is not attached. It is a perspective view of the MF holding part 80. FIG. 7 is a diagram showing an engagement state between an MF pressing portion 80 and a fixed cylinder 31. It is a perspective view of a fixed cylinder 31. It is a schematic sectional drawing of the front-end|tip part of the lens barrel 1 of a comparative form.

Hereinafter, a lens barrel 1 including a driving member according to an embodiment of the present invention will be described with reference to the drawings and the like.
(overall structure)
FIG. 1 is a cross-sectional view of the lens barrel 1. The lens barrel 1 is attachable to and detachable from the camera body 2. The lens barrel 1 is a so-called zoom lens whose focal length can be continuously changed.
The lens barrel 1 is a photographic optical system including six lens groups: a first lens group L1, a second lens group L2, a third lens group L3, a fourth lens group L4, a fifth lens group L5 and a sixth lens group L6. It has a system. The light from the subject passes through the first lens unit L1 to the sixth lens unit L6 and enters the camera body 2 side as subject light.

The lens barrel 1 includes a fixed barrel 31 fixed to the camera body 2. The fixed barrel 31 is a cylindrical member that is a base of the lens barrel 1 and has a straight groove 35 formed therein. The fixed cylinder 31 will be described later.
The outer periphery of the fixed barrel 31 on the camera body side is fixed to the outer fixed barrel 33, and the mount portion 32 for connecting the lens barrel 1 to the camera body 2 is provided on the outer fixed barrel 33 on the camera body side in the optical axis direction. It is provided integrally with.
Further, the lens barrel 1 has a substrate mounted inside the mount portion 32, and the substrate is provided with a control unit 34 that integrally controls the lens barrel 1.

The lens barrel 1 includes a zoom ring 50 arranged on the outer peripheral side of the fixed barrel 31. The zoom ring 50 is a cylindrical member arranged on the outer peripheral side of the fixed barrel 31, is rotatable with respect to the fixed barrel 31, is provided with a plurality of cam grooves 51, and is disposed in the optical axis direction with respect to the fixed barrel 31. It is provided so that it cannot be moved.

Further, the lens barrel 1 includes a movable barrel 60 on the inner peripheral side of the zoom ring 50. The movable barrel 60 will be described later. A first lens holding frame 41, a second lens holding frame 42, a third lens holding frame 43, a fourth lens holding frame 44, a fifth lens holding frame 45, and a sixth lens holding frame 46 are provided inside the moving barrel 60. It is arranged.

The first lens group L1 is held by the first lens holding frame 41. The first lens holding frame 41 is a substantially cylindrical frame, and is attached to the tip of the moving barrel 60.
The second lens group L2 is held by the second lens holding frame 42. The second lens holding frame 42 is a substantially cylindrical frame that holds the second lens group L2, and is arranged on the camera body side of the first lens holding frame 41 in the optical axis direction.

A diaphragm unit 47 is arranged on the object side in the optical axis direction of the second lens unit L2.
The third lens holding frame 43 holds the third lens group L3.
The fourth lens holding frame 44 is a substantially cylindrical frame that holds the fourth lens unit L4, and is arranged on the camera body side of the third lens unit L3 in the optical axis direction.
A fifth lens holding frame 45 that holds the fifth lens unit L5 is arranged on the camera body side of the fourth lens holding frame 44 in the optical axis direction.
The sixth lens holding frame 46 is arranged on the camera body side of the fifth lens holding frame 45 in the optical axis direction.

(Fifth lens holding frame 45)
FIG. 2 is an exploded perspective view of a main part of the lens barrel 1.
As shown in FIGS. 1 and 2, a fifth lens group cam follower 45a is formed integrally with the outer periphery of the fifth lens holding frame 45 so as to project in the radial direction. The fifth group cam followers 45a are arranged at three substantially equal positions in the circumferential direction.
The fifth-group cam follower 45 a penetrates the straight-moving groove 35 provided in the fixed barrel 31 and engages with the cam groove 51 provided in the zoom ring 50.
When the zoom ring 50 rotates, the fifth lens holding frame 45 moves straight due to the engagement of the cam groove 51 and the rectilinear groove 35 with the fifth group cam follower 45a.

(Moving cylinder 60)
The moving barrel 60 includes a tubular portion 62 and a moving barrel cam follower 61 provided on the outer periphery of the tubular portion 62 and protruding in the radial direction. The tubular portion 62 and the moving tubular cam follower 61 are integrally formed. The movable cylinder cam followers 61 are arranged at three substantially equal positions in the circumferential direction.
The moving barrel cam follower 61 penetrates the straight advance groove 35 provided in the fixed barrel 31 and engages with the cam groove 51 provided in the zoom ring 50.
When the movable ring 60 rotates the zoom ring 50, the movable barrel 60 moves straight due to the engagement of the cam groove 51 and the rectilinear groove 35 with the movable barrel cam follower 61.

(Fixed cylinder 31)
The above-described rectilinear groove 35 extending along the optical axis OA is formed in the fixed barrel 31. The rectilinear grooves 35 are arranged at three substantially equal positions in the circumferential direction.
Further, the front end portion of the fixed cylinder 31 is formed with a flange portion 36 protruding outward in the radial direction.
FIG. 3 is a diagram showing the relationship between the flange portion 36 of the fixed barrel 31 and the fifth group cam followers 45a, and FIG. 4 is a diagram showing the relationship between the flange portion 36 of the fixed barrel 31 and the moving barrel cam followers 61. ..

The flange portion 36 is formed with a cutout portion 37 having a height (radial length) through which the fifth group cam follower 45a and the moving cylinder cam follower 61 can penetrate. The cutout portion 37 is continuous with the rectilinear groove 35 of the fixed barrel 31.
That is, the rectilinear groove 35 extends to the front end portion of the fixed barrel 31 and penetrates the flange portion 36 of the fixed barrel 31. However, the outer diameter side of the rectilinear groove 35 in the flange portion 36 is connected in the circumferential direction. Therefore, the front end of the fixed barrel 31 is not cut in the circumferential direction, and the strength of the fixed barrel 31 is maintained.

(MF ring 70)
The lens barrel 1 further includes an MF (manual focus) ring 70 on the outer peripheral side of the object side end of the zoom ring 50 and the fixed barrel 31. FIG. 5 is an enlarged view of the MF ring 70 portion of the lens barrel 1. FIG. 6 is an enlarged view of the MF ring 70 portion of the lens barrel 1 and shows a state in which an MF ring holding portion 80 described later is not attached.

The MF ring 70 is an annular member, and has an operating portion 71 extending in the optical axis direction on the outer peripheral side, an extending portion 72 extending from the operating portion 71 to the inner peripheral side, and an optical member from the inner diameter side end portion of the extending portion 72. And a light shielding portion 73 extending toward the camera body in the axial direction.
As shown in FIGS. 1 and 6, the light shielding portion 73 has a comb-teeth shape in which protrusions are formed at regular intervals in the circumferential direction, and extends from the extending portion 72 along the optical axis to the fixed cylinder 31 side (in the optical axis direction). It extends to the camera body side).

(PI90)
Two photo interrupters (PI) 90 are attached to a portion of the flange portion 36 of the fixed barrel 31 on the subject side, which is different from the portion through which the rectilinear groove 35 penetrates. An FPC (not shown) extends from the PI 90 along the fixed barrel 31 and is connected to the substrate.

In each of the two PIs 90, a light emitting portion 91 and a light receiving portion 92, which are arranged to extend parallel to the optical axis, are arranged to face each other in the radial direction. That is, the light shielding portion 73 of the MF ring 70 is inserted into the gap 93 between the light emitting portion 91 and the light receiving portion 92 from the opening on the object side in the optical axis direction.
When the MF ring 70 rotates, the light blocking portion 73 also rotates and passes between the light emitting portion 91 and the light receiving portion 92 of the PI 90. At this time, the light shielding unit 73 blocks the light emitted from the light emitting unit 91 of the PI 90 and entering the light receiving unit 92, thereby causing a change in the detection signal of the PI 90. This detection signal is transmitted to the control unit 34 via the FPC.
The control unit 34 detects the rotation (rotation amount, rotation direction, rotation speed) of the MF ring 70 based on this detection signal. The control unit 34 drives the focus lens in the third lens group based on the detected rotation.

(MF retainer 80)
An MF retainer 80 is arranged in front of the MF ring 70. FIG. 7 is a perspective view of the MF holding unit 80. FIG. 8 is a diagram showing an engaged state of the MF holding portion 80 and the fixed barrel 31. FIG. 9 is a perspective view of the fixed cylinder 31. The MF retainer 80 is a member that rotatably retains the MF ring 70 against the fixed barrel 31.
The MF pressing portion 80 is a ring member, and is provided with an engaging portion 81 extending toward the camera body side in the optical axis direction. The engaging portions 81 are arranged at three locations substantially evenly in the circumferential direction.
Each of the engaging portions 81 has a first engaging portion 82 and a second engaging portion 83. The first engaging portion 82 and the second engaging portion 83 have the same shape, but are arranged opposite to each other. Claws 82a and 83a protruding in the circumferential direction are provided at the tip ends of the first engaging portion 82 and the second engaging portion 83. The claws 82a and 83a project in directions opposite to each other.

On the other hand, on the side surface of the fixed barrel 31, as shown in FIG. 9, a hole 36a through which the MF holding portion 80 is inserted is provided.
The outer surface of the fixed cylinder 31 is provided with a recess 38 continuous from the hole 36a. The recess 38 has a straight groove-like first portion 38a which is continuous with the hole 36a and has the same width as the circumferential width of the hole 36a, and a second portion which is wider in the circumferential direction from the tip of the straight groove portion. 38b and is formed in a T shape.
The circumferential width of 36a is smaller than the width between the distal end portions of the claw portions 82a and 83a in the circumferential direction when no force is applied as shown in FIG. When the MF holding portion 80 is mounted on the fixed cylinder 31 with the MF ring 70 sandwiched between them, the claw portions 82a and 83a of the engaging portion 81 are elastically deformed in the directions in which they approach each other, and the 36a can be inserted.
When inserted through 36a, the claws 82a and 83a move along the first portion 38a of the recess 38 while being elastically deformed. In the second portion 83b, since the width of the second portion 83b in the circumferential direction is wider than that of the first portion 38a, the elastic deformations of the claw portions 82a and 83a are restored, the mutual distance is widened, and the concave portion is formed. The second portion of 38 and the claw portions 82a and 83a (engagement portion 81) are engaged with each other.
Since the MF pressing portion 80 is fixed to the fixed barrel 31 in this manner, the MF ring 70 located between them is held immovably in the fixed barrel 31 in the optical axis direction.

(Comparison form)
Before describing the effects of the present embodiment, a comparative form will be described. FIG. 10 is a schematic cross-sectional view of the tip portion of the lens barrel 1 of the comparative form.
In the comparative form, the light shielding portion 73′ of the MF ring 70 extends in the radial direction.
The PI 90' is arranged at the tip of the fixed barrel 31' such that the light emitting portion 91' and the light receiving portion 92' are parallel to the radial direction, that is, between the light emitting portion 91' and the light receiving portion 92'. The gap 93' is open in the circumferential direction.

When the lens barrel 1 is assembled in the comparative form, the MF ring 70′ is attached to the tip of the fixed barrel 31′. Then, the light shielding portion 73′ of the MF ring 70′ is arranged in the gap 93 between the light emitting portion 91 and the light receiving portion 92, and the PI 90′ is attached to the tip of the fixed barrel 31′.
Then, the FPC extending from the PI 90' to the control unit is attached to the fixed barrel 31', and then the movable barrel 60' is inserted from the tip of the fixed barrel 31'.

Here, if the moving barrel cam follower 61′ of the moving barrel 60′ is integrally formed with the moving barrel 60′, when the moving barrel 60′ is inserted into the fixed barrel 31′, the light blocking portion 73′ of the MF ring 70′ is provided. Since it extends in the optical axis direction, it is impossible to insert the moving barrel 60′ integrally formed with the moving barrel cam follower 61′ in the optical axis direction due to the light blocking portion 73′.

Therefore, the moving barrel cam follower 61' needs to be separated from the moving barrel 60'. Then, inside the fixed barrel 31', the movable barrel 60' in which the movable barrel cam follower 61' is not formed is inserted, and thereafter, the movable barrel cam follower 61' is inserted from the outer peripheral side of the rectilinear groove 35' of the fixed barrel 31'. Attach it to the moving barrel 60'.
As described above, in the comparative embodiment, the moving barrel 60′ and the moving barrel cam follower 61′ cannot be integrally molded, resulting in high manufacturing cost and weak strength.

(This embodiment)
However, in the present embodiment, when assembling the lens barrel 1, the gap between the light emitting portion 91 and the light receiving portion 92 is opened toward the subject side of the flange portion 36 of the fixed barrel 31 toward the subject side in the optical axis direction. Then, the PI90 is attached. Then, the FPC from the PI 90 is extended to the control unit.

Then, the fifth lens holding frame 45 and the movable barrel 60 are inserted into the fixed barrel 31.
In the embodiment, the fifth lens holding frame 45, the fifth group cam follower 45a, the movable barrel 60 and the movable barrel cam follower 61 are integrally molded.
However, since the MF ring 70 is not attached to the fixed barrel 31, the fifth group cam follower 45 a and the moving barrel cam follower 61 can be inserted through the cutout portion 37 of the flange portion 36 of the fixed barrel 31. ..

Then, the MF ring 70 is attached to the tip of the fixed barrel 31. At that time, the light shielding portion 73 of the MF ring 70 is made to enter the gap of the PI 90.
The MF retainer 80 is inserted into the fixed barrel 31 from the subject side of the MF ring 70. At this time, the engaging portion 81 is inserted into the recess 38 of the fixed barrel 31 through the hole of the fixed barrel 31. The claw portions 82a and 83a of the engaging portion 81 are elastically deformed in the directions in which they approach each other, and are inserted through the holes. Then, the claws 82a and 83a move along the first portion 38a of the recess 38 while being elastically deformed. In the second portion 38b, the distance between the claw portions 82a and 83a is increased, and the second portion 38b of the recess 38 is engaged with the claw portions 82a and 83a (engagement portion 81).

Since the MF pressing portion 80 is fixed to the fixed barrel 31 in this manner, the MF ring 70 located between them is held immovably in the fixed barrel 31 in the optical axis direction.
The structure for holding down the MF ring 70 of the MF holding portion 80 is composed of an engaging portion 81 having a narrow radial width and a recess 38 provided on the peripheral surface of the fixed barrel 31. Therefore, the pressing structure does not increase the thickness in the radial direction and is easy to assemble.

As described above, according to the present embodiment, unlike the comparative example, the gap 93 between the light emitting portion 91 and the light receiving portion 92 of the PI 90 is open toward the subject side in the optical axis direction. The light shielding portion 73 of the MF ring 70 extends in the axial direction toward the camera body and is arranged in the gap.
According to this configuration, the MF ring 70 can be attached to the fixed barrel 31 after attaching the PI 90.

Therefore, the movable barrel 60 can be inserted into the fixed barrel 31 without the MF ring 70 attached, so that the light-shielding portion 73 of the MF ring 70 moves into the fixed barrel 31 of the movable barrel 60. There is no hindrance when placing.
Therefore, the moving barrel 60 and the moving barrel cam follower 61 can be integrally formed, the manufacturing cost is reduced, and the strength of the moving barrel cam follower 61 is improved.

The embodiment described above can be modified and changed in various ways as described below.
For example, in the present embodiment, the example in which the PI that detects the rotation of the MF ring is attached to the fixed cylinder has been described, but the present invention is not limited to this, and may be applied to, for example, the diaphragm and the arrangement of the PI that detects the rotation. ..

1: lens barrel, 31: fixed barrel, 32: mount portion, 33: outer fixed barrel, 34: control portion, 35: straight groove, 36: flange portion, 36a: hole, 37: notch portion, 38: recessed portion , 38a: first portion, 38b: second portion, 50: zoom ring, 51: cam groove, 60: moving barrel, 61: moving barrel cam follower, 62: tubular portion, 70: MF ring, 71: operating portion, 72: extension part, 73: light-shielding part, 80: MF ring holding part, 81: engaging part, 82: first engaging part, 82a: claw part, 83: second engaging part, 83a: claw part, 83b: second part, 90: position detecting part, 91: light emitting part, 92: light receiving part, 93: gap

Claims (8)

A first tube,
An annular portion rotatable along the circumferential direction of the first cylinder and a first protrusion protruding from the annular portion in a first direction parallel to the central axis of the first cylinder are provided. Rotating member,
It has a light emitting portion and a light receiving portion which are arranged to face each other in the radial direction of the first cylinder, and the first protrusion passes between the light emitting portion and the light receiving portion, whereby the rotation is achieved. A position detector that detects rotation of the member with respect to the first cylinder;
A first tubular member that extends in a direction parallel to the first direction and that is disposed inside the first tubular member, and a first tubular member that extends from the first tubular member to the first tubular member. A second cylinder having a second protrusion protruding radially outward through the opening;
Equipped with
End of the rotary member in the second direction opposite to the first direction, Ri said first of said second direction side near than the end of the second direction side of the cylinder,
The first cylinder is
A flange portion that is provided on the second direction side and that projects outward and has a second opening portion;
A first portion continuously extending along the outer peripheral surface from the second opening, and a recess having a second portion having a width in the circumferential direction wider than the first portion at the tip of the first portion. ,
Further, a pair of engaging portions extending toward the first cylinder are provided on the annular member arranged on the second direction side of the first cylinder with the rotating member interposed therebetween, and the pair of engagements are provided. Each of the parts has a claw part at its tip, and the claw part is engaged with the second part and is fixed immovably in the optical axis direction with respect to the first tube, thereby enabling the rotation. a lens barrel Ru comprising a pressing member for holding the member to the first tubular. A first tube,
An annular portion rotatable along the circumferential direction of the first cylinder, and a first protrusion connected to the annular portion and protruding in a first direction parallel to the central axis of the first cylinder. A rotating member provided,
It has a light emitting portion and a light receiving portion which are arranged to face each other in the radial direction of the first cylinder, and the first protrusion passes between the light emitting portion and the light receiving portion, whereby the rotation is achieved. A position detector that detects rotation of the member with respect to the first cylinder;
A first tubular member that extends in a direction parallel to the first direction and that is disposed inside the first tube;
A second cylinder having a second protrusion protruding radially outward from the first cylindrical member through a first opening provided in the first cylinder;
Equipped with
The position detector is disposed at an end of the first cylinder on the second direction side opposite to the first direction ,
The first cylinder is
A flange portion that is provided on the second direction side and that projects outward and has a second opening portion;
A first portion continuously extending along the outer peripheral surface from the second opening, and a recess having a second portion having a width in the circumferential direction wider than the first portion at the tip of the first portion. ,
Further, a pair of engaging portions extending toward the first cylinder are provided on the annular member arranged on the second direction side of the first cylinder with the rotating member interposed therebetween, and the pair of engagements are provided. Each of the parts has a claw part at its tip, and the claw part is engaged with the second part and is fixed immovably in the optical axis direction with respect to the first tube, thereby enabling the rotation. a lens barrel Ru comprising a pressing member for holding the member to the first tubular. A first tube,
An annular portion rotatable along the circumferential direction of the first cylinder and a first protrusion protruding from the annular portion in a first direction parallel to the central axis of the first cylinder are provided. A rotating member,
It has a light emitting portion and a light receiving portion which are arranged to face each other in the radial direction of the first cylinder, and the first protrusion passes between the light emitting portion and the light receiving portion, whereby the rotation is achieved. A position detector that detects rotation of the member with respect to the first cylinder;
A first tubular member that extends in a direction parallel to the first direction and that is disposed inside the first tube;
A second cylinder having a second protrusion protruding radially outward from the first cylindrical member through an opening provided in the first cylinder;
A second tubular member that is provided with a groove that fits into the second protrusion and extends in a direction parallel to the central axis of the first barrel is disposed outside the first barrel. And a third tube,
Lens barrel equipped with. It is a lens barrel as described in any one of Claims 1-3, Comprising:
A lens barrel in which the first tubular member and the second protrusion are integrally formed in the second barrel. The lens barrel according to claim 1 or 2, wherein
The first cylinder has a flange portion projecting to the outer peripheral side on the central axis of the first cylinder on the second direction side from the position where the second protrusion of the second cylinder is arranged. Have,
The lens barrel, wherein the flange portion is provided with a second opening through which the second protrusion can pass, and the second opening and the first opening are connected to each other. It is a lens barrel as described in any one of Claims 1-5, Comprising:
The rotating member, the first cylinder, and the second cylinder are arranged such that the central axis of the rotating member, the central axis of the second cylinder, and the central axis of the first cylinder coincide with each other,
The distance from the central axis of the first cylinder at the position of the tip of the second protrusion is greater than the distance from the central axis of the first cylinder at the position of the first protrusion of the rotating member. A large lens barrel. The lens barrel according to any one of claims 1 to 5,
The lens barrel further includes
A second annular portion arranged to sandwich at least a part of the rotating member with the first cylinder and the first annular cylinder extending from the second annular part in the first direction are fitted together. A lens barrel including an annular member including a portion. An optical device comprising the lens barrel according to claim 1.

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