JPH11194255A - Lens barrel - Google Patents

Abstract

(57) [Problem] To provide a lens barrel capable of reducing processing cost and improving operability. SOLUTION: An interlocking ring 400 is a member for imparting rigidity to the zoom operation ring 4 and is fixed to an inner peripheral portion of the zoom operation ring 4. The interlocking ring 400 has a cylindrical annular portion 420.
And a projection 4 fitted into the notch 5d of the zoom cam barrel 5.
It consists of 10. The zoom cam barrel 5 rotates in conjunction with the zoom operation ring 4, and drives the lens units L1, L2, L3, and L4 in the optical axis C direction. At this time, the zoom cam barrel 5
It receives a load due to rotational movement due to the weight of the lens group and the lens frame. Since the zoom operation ring 4 includes the interlocking ring 400 having high rigidity, the rotation condition and the operation condition can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel having an operation ring operated during a zooming operation or a focusing operation.

[0002]

2. Description of the Related Art FIG. 3 is a partial sectional view showing an example of a conventional lens barrel. FIG. 4 is a partial cross-sectional view showing a state cut along the line IV-IV in FIG. In FIG. 3, the pins 9, 10, 11 and the cam grooves 5a, 5b, 5c are
It is also provided at a position symmetrical with respect to the optical axis C by 180 degrees, and one of these is not shown in FIG.

The lens barrel 1 includes a first lens unit L1, a second lens unit L2, and a third lens unit L2 disposed about the optical axis C.
Lens group L3 and fourth lens group L4, lens support frame 12, sliding cylinders 7, 8, and sliding cylinder 6, which support them, fixed cylinder 2, inner cylinder 2c and outer cylinder 2b, respectively. And a zoom operation ring 4 for rotating the zoom cam tube 5, a focus operation ring 3 for driving the lens support frame 12, and the like.

The fixed cylinder 2 is a member for rotatably supporting the zoom operation ring 4, the focus operation ring 3, the zoom cam cylinder 5, and the like. The fixed cylinder 2 has a cylindrical inner cylinder portion 2c.
And a cylindrical outer cylinder 2b formed on the outer periphery of the inner cylinder 2c. The fixed barrel 2 has a mount 2a at its rear end for detachably mounting the lens barrel 1 on a flange portion of a camera body (not shown).

[0005] The outer cylinder portion 2b is a portion for supporting the focus operation ring 3 and the zoom operation ring 4 so as to be rotatable about the optical axis C. The mounting portion 2 is provided on the inner peripheral surface of the outer cylindrical portion 2b.
On the opposite side of a, an engagement portion 21a for rotatably attaching the focus operation ring 3 is formed. Outer cylinder part 2b
An engagement portion 21b for rotatably attaching the zoom operation ring 4 is formed substantially at the center of the outer peripheral surface of the lens.
In the outer cylinder portion 2b, an escape peripheral groove 2g is formed at a predetermined length around the engagement portion 21b so as to penetrate the engagement portion 21b so that the zoom operation ring 4 can rotate. The outer cylinder 2b has an end on the mount 2a side connected to the outer peripheral surface of the inner cylinder 2c.

[0006] The focus operation ring 3 is a member that is operated when performing a focus adjustment for forming an image of a subject on an imaging surface (not shown). On the outer peripheral surface of the focus operation ring 3, the outer cylinder portion 2
An engagement portion 31a slidably engaged with the engagement portion 21a of FIG. On the inner peripheral surface of the focus operation ring 3, a key groove 3 that engages with the key projection 12 b of the lens support frame 12 is provided.
1b is formed parallel to the optical axis C.

[0007] The zoom operation ring 4 is a member that is operated when photographing while continuously changing the focal length. On the inner peripheral surface of the zoom operation ring 4, an engaging portion 41 b slidably engaging with the engaging portion 21 b of the outer cylindrical portion 2 b and a projection 40 are provided. The zoom operation ring 4 transmits the rotation force generated by the rotation operation to the zoom cam barrel 5 via the protrusion 40,
The zoom cam barrel 5 is rotated.

The projection 40 is a member for transmitting the rotational force generated by operating the zoom operation ring 4 to the zoom cam barrel 5. As shown in FIG. 4, the projection 40 is formed on the inner peripheral surface of the zoom operation ring 4 so as to project toward the optical axis C. The projection 40 passes through the escape peripheral groove 2 g of the outer cylinder 2 b and is cut out 5 d of the zoom cam cylinder 5.
It is stuck in.

The inner cylinder portion 2c supports the zoom cam cylinder 5 so as to be rotatable about the optical axis C, and also supports the sliding cylinder 6
It is a part for holding movably in the direction. Inner cylinder 2
As shown in FIG. 3, engagement portions 22a and 22b for rotatably supporting the zoom cam cylinder 5 are formed on the outer peripheral surface of the portion c. The inner cylinder portion 2c is fitted on the inner peripheral surface of the zoom cam cylinder 5 with its outer peripheral surface in contact with the inner peripheral surface of the zoom cam cylinder 5. The inner peripheral surface of the inner cylinder portion 2c is in contact with the outer peripheral surface of the
Is fitted. The inner cylindrical portion 2c penetrates from the inner peripheral portion side to the outer peripheral portion side, and is formed in parallel with the optical axis C, and has rectilinear grooves 2d, 2e for zooming for guiding the pins 9, 10, 11; 2f.

The zoom cam barrel 5 is a member for applying a driving force to be driven along the straight grooves 2d, 2e, 2f to the pins 9, 10, 11 by rotating. The zoom cam barrel 5 is slidably engaged with the cam grooves 5a, 5b, 5c, the notch 5d formed at the end of the zoom cam barrel 5 on the mount 2a side, and the engaging portions 22a, 22b. There are provided joints 51a and 51b.

The cam groove 5a is a groove for driving the first lens unit L1 and the fourth lens unit L4 in the direction of the optical axis C. The cam groove 5b is a groove for driving the second lens unit L2 in the direction of the optical axis C. The cam groove 5c is for driving the third lens unit L3 in the optical axis C direction. Cam groove 5
a, 5b and 5c penetrate from the inner peripheral side to the outer peripheral side of the zoom cam barrel 5 and are formed in a spiral shape around the optical axis C.

The sliding barrel 6 is a member for supporting the fourth lens unit L4 and for holding the sliding barrels 7 and 8 movably in the direction of the optical axis C. The sliding cylinder 6 is mounted on the mount 2a.
A lens support portion 60 formed on the inner peripheral portion on the side, and a straight cylindrical portion 61 continuous with the lens support portion 60.

The lens support section 60 is provided with a fourth lens unit L4.
It is a part for supporting. A lens mounting portion 60a is formed on the inner peripheral portion of the lens support portion 60, and the outer peripheral portion of the fourth lens unit L4 is fitted into the lens mounting portion 60a.

The straight cylindrical portion 61 is formed by moving the sliding cylinders 7 and 8 along the optical axis C.
It is a part for holding movably in the direction. The straight cylindrical portion 61 is a portion extending in parallel with the optical axis C from the vicinity of the end of the zoom cam tube 5 on the mount portion 2a side to the engaging portion 22a side of the inner cylindrical portion 2c. The straight body cylindrical portion 61 is formed from a pin mounting portion 61a for mounting the pin 9 to the outer peripheral surface thereof, and from the inner circumferential side to the outer circumferential side of the straight body cylindrical portion 61.
It has an escape groove 61b through which 0 and 11 penetrate, and a male helicoid screw portion 61c formed on the outer peripheral surface on the tip (subject) side of the straight body cylindrical portion 61. Straight body cylindrical part 61
The inner peripheral surface of is in contact with the outer peripheral surfaces of the sliding cylinders 7 and 8,
The sliding cylinders 7 and 8 are fitted.

The pin 9 is a pin for moving the sliding cylinder 6 in the direction of the optical axis C by moving along the straight groove 2d and the cam groove 5a. The pin 9 protrudes from the outer peripheral surface of the straight cylindrical portion 61, passes through the straight groove 2d, and is movably fitted into the cam groove 5a.

The lens support frame 12 includes a first lens unit L1.
It is a frame for supporting. The lens support frame 12 is disposed on the outer peripheral side of the male helicoid screw part 61 c of the straight cylindrical part 61 and on the inner peripheral side of the focus operation ring 3. The lens support frame 12 includes an outer cylindrical portion 12e disposed between an outer peripheral portion of the male helicoid screw portion 61c of the straight cylindrical portion 61 and an inner peripheral portion of the focus operation ring 3, and an outer cylindrical portion 1e.
A flange portion 12d protruding from the inner peripheral portion of 2e and folded back in a direction parallel to the optical axis C, and a lens attaching portion 12a formed on the inner peripheral portion of the flange portion 12d for attaching the first lens group L1. A key protruding portion 12b formed on the outer peripheral portion of the outer cylindrical portion 12e and engaging with the key groove 31b; and a male helicoid screw portion 61c of the straight cylindrical portion 61 formed on the inner peripheral portion of the outer cylindrical portion 12e. Female Helicoid Thread 1
2c.

The sliding cylinders 7 and 8 are members for supporting the second lens unit L2 and the third lens unit L3, respectively. The sliding cylinders 7 and 8 have the same structure except that they support different lens groups.
This will be mainly described. On the outer peripheral surface of the sliding cylinder 7, a pin mounting portion 71a for mounting a pin 10 described later is formed. A lens mounting portion 71b for mounting the second lens group L2 is formed on the inner peripheral portion of the sliding cylinder 7.

The pins 10 and 11 are respectively provided in the straight grooves 2e and 2e.
By moving along 2f and the cam grooves 5b and 5c,
These pins are used to move the sliding cylinders 7 and 8 in the direction of the optical axis C. The pin 10 protrudes from the outer peripheral surface of the sliding cylinder 7, passes through the relief groove 61b and the rectilinear groove 2e, and is movably fitted in the cam groove 5b. The pin 11 protrudes from the outer peripheral surface of the sliding cylinder 8, passes through the relief groove 61b and the rectilinear groove 2f,
It is movably fitted in the cam groove 5c.

Next, the operation of the conventional lens barrel will be described separately for a zooming operation and a focusing operation. (Zooming operation) When the zoom operation ring 4 rotates around the optical axis C, the projection 40 protruding from the zoom operation ring 4 pushes the notch 5d of the zoom cam barrel 5 in the direction of the arrow shown in FIG.
The zoom cam barrel 5 rotates around the optical axis C. When the zoom cam barrel 5 rotates, the pin 9 moves in contact with the side surface of the cam groove 5a and is pushed by this side surface. Pin 9 is the cam groove 5
a receiving the driving force at the contact portion with the side surface of
It moves in a direction parallel to the optical axis C along d. When the zoom cam cylinder 5 rotates, the side surfaces of the cam grooves 5b and 5c push the pins 10 and 11, respectively. The pins 10, 11 receive driving force at the contact portions between the side surfaces of the cam grooves 5b, 5c and the pins 10, 11, and move in the direction parallel to the optical axis C along the straight grooves 2e, 2f, respectively.

As a result, the sliding cylinder 6 with the pin 9 attached thereto
Moves in the direction of the optical axis C while being in contact with the inner peripheral surface of the inner cylindrical portion 2c. The sliding cylinder 6 and the lens support frame 12 are connected to each other by a male helicoid screw portion 6c and a female helicoid screw portion 12c. For this reason, when the sliding cylinder 6 moves, the lens support frame 12 moves to the key groove 3 engaging with the key protrusion 12b.
1b, it moves in the optical axis C direction. Further, the sliding cylinders 7 and 8 to which the pins 10 and 11 are respectively attached move in the direction of the optical axis C while being in contact with the inner peripheral surface of the sliding cylinder 6 by the same operation. By the above operation, the first lens unit L
1, the second lens unit L2, the third lens unit L3, and the fourth
Moves in the direction of the optical axis C to perform a zooming operation.

(Focusing operation) When the focus operation ring 3 rotates around the optical axis C, the side surface along the longitudinal direction of the key groove 31b pushes the key projection 12b, and the lens support frame 12 will rotate around the optical axis C. And Lens support frame 1
2 is a male helicoid thread 6c and a female helicoid thread 1
Although connected to the sliding cylinder 6 by 2c, the pin 9 provided on the sliding cylinder 6 allows only movement along the straight groove 2d. For this reason, the sliding cylinder 6 cannot rotate,
The female helicoid screw portion 12c and the male helicoid screw portion 6c of the sliding cylinder 6 are engaged, and the lens support frame 12 moves while rotating in the direction of the optical axis C. By the above operation, the first lens unit L1 moves in the direction of the optical axis C to perform the focusing operation.

[0022]

A conventional lens barrel 1
When the knurl member is attached to the outer periphery of the zoom operation ring 4, the knurl may be integrally formed on the outer periphery of the zoom operation ring 4 in order to avoid an increase in the outer shape of the lens barrel 1. there were. In addition, zoom operation ring 4
When engraving a focal length scale on the outer peripheral surface of the lens, or when providing a hole or notch in the zoom operation ring 4 due to the structure of the lens barrel 1, or when the zoom operation ring 4 needs an appearance comparable to that of paint In such cases, the processing cost had to be reduced. For this purpose, instead of engraving the focal length scale,
It is necessary to integrally form a focal length scale on the outer peripheral surface of the zoom operation ring 4 or to perform grain forming instead of painting. As a result, a molded product made of a synthetic resin material is often used for the zoom operation ring 4 in order to avoid forming a focal length scale or a hole by shaving a metal material. In this case, in the conventional lens barrel 1, the zoom operation ring 4 and the projection 40 are integrally formed of a synthetic resin material, or the projection 40, which is a pressed component, is attached to the zoom operation ring 4 of the synthetic resin material. It was attached with screws.

However, in the conventional lens barrel 1, during zooming operation, the weight of each lens group, lens frame, and the like is reduced via the pins 9, 10, 11 as a load (resistance) due to the rotational movement of the zoom cam barrel. Acts on 5. When the zoom cam barrel 5 is rotated by the zoom operation ring 4, the load caused by such a rotational movement acts on the zoom operation ring 4 and the protrusion 40. For this reason, when the zoom operation ring 4 rotates in the direction of the arrow shown in FIG. 4, when the rigidity of the zoom operation ring 4 is insufficient, as shown by a two-dot chain line in FIG. In the vicinity of the connection portion with the portion 40, there was a possibility that the portion was deformed in a wavy manner. As a result, there is a possibility that the rotation condition and the operation condition of the zoom operation ring 4 are reduced.

Such a deformation of the zoom operation ring 4 can be solved, for example, by providing a plurality of projections 40 on the zoom operation ring 4 and stably rotating the zoom cam cylinder 5 by a couple. However, in many cases, only one projection 40 can be formed on the zoom operation ring 4 due to the space in the lens barrel 1.

Further, in order to prevent such deformation of the zoom operation ring 4, a large amount of glass fiber, carbon fiber, or the like may be mixed therein, and the zoom operation ring 4 may be formed of a rigid synthetic resin material. However, these fibers
There are many problems that the molded product is often floated on the surface, the appearance quality cannot be maintained by grain forming, and a costly coating process is required.

An object of the present invention is to provide a lens barrel capable of reducing processing costs and improving operability.

[0027]

The present invention solves the above-mentioned problems by the following means. In addition, in order to make it easy to understand, description is given with reference numerals corresponding to the embodiment of the present invention, but the present invention is not limited to this. That is, according to the first aspect of the present invention, the first rotation generates a driving force by rotating and moves at least a part of the photographing optical system (L1, L2, L3, L4) in the direction of the optical axis (C). A member (5), a second rotating member (4) for rotating the first rotating member, and a rotating force generated by the second rotating member provided on the first or second rotating member. A transmission member (410, 420) for transmitting to the first rotating member, wherein the transmission member has at least a part thereof the first rotation member.
Alternatively, a rigidity imparting section (42) for imparting rigidity to the second rotating member.
(0).

According to a second aspect of the present invention, in the lens barrel according to the first aspect, the first rotating member is supported by a cam ring (5) that is rotatably supported about an optical axis and receives a rotational load. The lens barrel is characterized in that the second rotating member is an operating ring (4) rotatably supported about an optical axis.

The invention of claim 3 is the invention of claim 1 or claim 2.
In the lens barrel described in the above, the second rotating member,
The lens barrel is a zoom operation ring (4), a focus operation ring, or a switching operation ring for switching between auto focus and manual focus.

The invention according to claim 4 is the invention according to claims 1 to 3.
In the lens barrel according to any one of the above, the transmitting member is provided on an annular portion (420) provided on an inner peripheral portion of the second rotating member, and the transmitting member is provided on the annular portion. First
And an engaging portion (410) for engaging with the rotating member.

According to a fifth aspect of the present invention, in the lens barrel according to the fourth aspect, the annular portion and / or the engaging portion is
A lens barrel having higher rigidity than the second rotating member.

The invention of claim 6 is the invention of claim 4 or claim 5.
In the lens barrel described in the above, the second rotating member,
The lens barrel is made of a synthetic resin material, and the annular portion and / or the engagement portion is made of a metal material.

[0033] The invention of claim 7 is the invention of claims 4 to 6.
The lens barrel according to any one of the above, wherein the annular portion and / or the engaging portion are attached to the inner peripheral portion of the second rotating member at a plurality of locations. It is a lens barrel.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Hereinafter, a first embodiment of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a partial sectional view of a lens barrel according to a first embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a state cut along the line II-II in FIG. In the following, the same members as those shown in FIGS. 3 and 4 are denoted by the same reference numerals or corresponding reference numerals, and detailed description thereof will be omitted.

The interlocking ring 400 is a member for imparting rigidity to the zoom operation ring 4 and transmitting a rotational force generated by operating the zoom operation ring 4 to the zoom cam cylinder 5. The interlocking ring 400, as shown in FIG.
It comprises a cylindrical annular portion 420 and a projection 410 projecting from the inner peripheral portion of the annular portion 420 toward the optical axis C and formed integrally with the annular portion 420. The interlocking ring 400 is made of a material having higher rigidity than the zoom operation ring 4.
When the zoom operation ring 4 is made of a synthetic resin material or the like,
It is made of a metal material having higher rigidity than the synthetic resin material. In the interlocking ring 400, the inner peripheral portion of the annular portion 420 is
Are rotatably supported by the outer cylindrical portion 2b, and are rotatable about the optical axis C integrally with the zoom operation ring 4.

The screw 430 is a member for fixing the interlocking ring 400 to the inner peripheral portion of the zoom operation ring 4 with the outer peripheral portion of the annular portion 420 being in contact with the inner peripheral portion of the zoom operation ring 4. is there. The screw 430 connects the zoom operation ring 4 and the interlocking ring 400 with each other at a 180-degree symmetric position about the optical axis C.
It is fixed in place.

As described above, the lens barrel according to the first embodiment of the present invention has the following effects. (1) An interlocking ring 4 made of a metal material for imparting rigidity to the zoom operation ring 4 is provided on an inner peripheral portion of the zoom operation ring 4.
00 is attached. As a result, even if the zoom cam barrel 5 is rotated by the zoom operation ring 4 against the load (resistance force) caused by the rotational movement, the rigidity of the zoom operation ring 4 increases, so that the projection 410 of the zoom operation ring 4 is increased. Around the connection with
No deformation as shown in FIG. 4 occurs. For this reason, the rotation condition and the operation condition of the zoom operation ring 4 can be improved. Further, since the interlocking ring 400 is present on the entire circumference of the zoom operation ring 4, the inner peripheral portion of the interlocking ring 400 can be satisfactorily finished in dimensional accuracy and surface quality by turning. As a result, the interlocking ring 400 can be used as an auxiliary part or an alternative part of the engaging part 41b of the zoom operation ring 4. Further, the interlocking ring 400 is attached to an inner peripheral portion of the zoom operation ring 4. For this reason, even if a molded product made of a synthetic resin material is used for the zoom operation ring 4, the appearance quality of the zoom operation ring 4 does not deteriorate.

(2) The interlocking ring 400 is fixed to the inner peripheral portion of the zoom operation ring 4 by a screw 430 at a 180-degree symmetric position about the optical axis C. For this,
The fixing between the zoom operation ring 4 and the interlocking ring 400 can be made strong. In addition, since the load associated with the rotational movement of the zoom cam barrel 5 is distributed and added to the zoom operation ring 4,
The deformation of the zoom operation ring 4 can be reliably prevented.

(3) The interlocking ring 400 has a simple structure including a ring portion 420 and a projection 410. For this purpose, the protrusions 410 are formed by forging or die casting.
Can be easily formed. As a result, the interlocking ring 40
0 machining cost can be greatly reduced.

(Other Embodiments) The present invention is not limited to the above-described embodiments, and various modifications or changes can be made as described below. Within range. (1) In the embodiment of the present invention, the lens barrel in which the zoom cam barrel 5 is disposed on the inner peripheral side of the zoom operation ring 4 has been described as an example, but the zoom cam barrel 5 is disposed on the outer peripheral side of the zoom operation ring 4. The present invention can be applied to a lens barrel in which is disposed. An interlocking ring 400 for providing rigidity is provided on the zoom cam cylinder 5 side, and a notch 5d is provided on the zoom operation ring 4 side.
Can also be provided. Further, the case where the zoom operation is performed by the zoom operation ring 4 has been described as an example, but the present invention is also applied to a focus operation ring for performing a focusing operation and a switching operation ring for switching between auto focus and manual focus. be able to.

(2) In the embodiment of the present invention, the case where the interlocking ring 400 is formed of a metal material has been described as an example. However, a highly rigid synthetic resin material containing a large amount of glass fiber, carbon fiber, or the like is used. The interlocking ring 400 can be formed. Also in this case, the appearance quality of the zoom operation ring 4 does not deteriorate, and the processing cost of the interlocking ring 400 can be further reduced by integral molding. Also, the interlocking ring 400 may be configured such that the protrusion 410 and the ring portion 420 are separate members for the convenience of processing and the assembly, and the ring 400 is made of a metal material having higher rigidity than the zoom operation ring 4. Only the portion 420 may be formed.

(3) In the embodiment of the present invention, the interlocking ring 400 and the zoom operation ring 4 are fixed with two screws 430 at a 180-degree symmetrical position about the optical axis C.
It may be fixed at three or more locations due to space limitations in the lens barrel. In addition, by concave and convex engagement, partial adhesion or whole circumference adhesion or integral molding with insert, etc.,
The interlocking ring 400 and the zoom operation ring 4 may be fixed. Further, a plurality of protrusions 410 may be formed on the annular portion 420 for reasons such as space in the lens barrel.

[0043]

As described above in detail, according to the present invention, the operability of the first or second rotating member, such as the rotational condition and the operating condition, can be improved. Further, processing of the first or second rotating member can be facilitated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a lens barrel according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view showing a state cut along a line II-II in FIG. 1;

FIG. 3 is a sectional view showing an example of a conventional lens barrel.

FIG. 4 is a partial cross-sectional view showing a state cut along the line IV-IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lens barrel 2 Fixed cylinder 2b Outer cylinder part 2c Inner cylinder part 3 Focus operation ring 4 Zoom operation ring 5 Zoom cam cylinder 5d Cutout part 40, 410 Projection part 400 Interlocking ring 420 Ring part 430 Screw C Optical axis L1 First Lens group L2 Second lens group L3 Third lens group L4 Fourth lens group

Claims (7)

[Claims] 1. A driving force is generated by rotation.
A first mechanism for moving at least a part of the photographing optical system in the optical axis direction;
A rotating member, a second rotating member for rotating the first rotating member, and a rotating force provided on the first or second rotating member, the rotating force generated by the second rotating member being the first rotating member. A transmission member for transmitting to a rotating member, wherein the transmission member includes, at least in part, a stiffness imparting portion that imparts rigidity to the first or second rotating member. . 2. The lens barrel according to claim 1, wherein the first rotating member is a cam ring rotatably supported about an optical axis and receiving a rotational load, and the second rotating member. Is an operation ring supported rotatably about the optical axis, wherein: 3. The lens barrel according to claim 1, wherein the second rotating member is a zoom operation ring, a focus operation ring, or a switching operation ring for switching between auto focus and manual focus. A lens barrel characterized in that: 4. One of claims 1 to 3
In the lens barrel described in the paragraph, the transmission member is provided on an annular portion provided on an inner peripheral portion of the second rotating member, and is provided on the annular portion and engages with the first rotating member. A lens barrel comprising: 5. The lens barrel according to claim 4, wherein the annular portion and / or the engaging portion have higher rigidity than the second rotating member. 6. The lens barrel according to claim 4, wherein the second rotation member is made of a synthetic resin material, and the annular portion and / or the engagement portion is made of a metal material. A lens barrel characterized in that: 7. Any one of claims 4 to 6
The lens barrel according to any one of claims 1 to 3, wherein the annular portion and / or the engaging portion are attached to an inner peripheral portion of the second rotating member at a plurality of locations.