JP2017181728A - Lens barrel, optical device, and lens barrel manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel, optical device and lens barrel manufacturing method that are easily assembled.SOLUTION: A lens barrel 1, which is the lens barrel that includes an optical system having a first optical component L2, a second optical component L3, a third optical component L4 arranged in order, comprises: a first holding member 20 that holds the first optical component L2; a coupling cylinder 100 that holds the third optical component L4 on one end side, has a holding cylinder 40 having a first opening part 23 penetrating through other end side provided in a lateral face, and has the first holding member 20 coupled to the other end side of the holding cylinder 40; and a second holding member 30 that holds the second optical component L3, and has at least a part arranged in an interior part of the coupling cylinder 100.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lens barrel, an optical device, and a method for manufacturing a lens barrel.

There is a zoom type lens barrel in which a plurality of lens groups are individually moved by a cam mechanism and a guide bar mechanism to change a focal length.
Conventionally, in such a lens barrel, in order to simplify the configuration, a moving cylinder that couples and moves the two lens groups integrally, and an intermediate lens that is inserted between the two lens groups of the moving cylinder Some have a group (see Patent Document 1).

Japanese Unexamined Patent Publication No. 5-66335

The lens barrel of the present invention is a lens barrel having an optical system in which a first optical component, a second optical component, and a third optical component are arranged in order, and a first holding member that holds the first optical component. And a holding cylinder that holds the third optical component on one end side and has a first opening penetrating the other end side provided on a side surface, and the first holding on the other end side of the holding cylinder A connecting cylinder to which members are connected and a second holding member that holds the second optical component and is at least partially disposed inside the connecting cylinder are provided.
A lens barrel comprising:
The optical device according to the present invention includes the lens barrel.
Furthermore, the manufacturing method of the lens barrel of the present invention is a manufacturing of a lens barrel in which the first holding member that holds the first optical component, the second holding member that holds the second optical component, and the third optical component is arranged. In the method, the third optical component is held on one end side and the second end of the holding cylinder provided on the side surface with an opening extending through the other end side is moved to the inside of the holding cylinder. A holding member is inserted, and the first holding member is connected to the other end of the holding cylinder.

It is sectional drawing along the optical axis OA of the lens-barrel 1 of embodiment. 1 is an exploded perspective view of a lens barrel 1. FIG. (A) to (d) are diagrams for explaining the order of attaching the third group lens frame 30 and the second group lens frame 20 to the fourth group lens barrel 40, and are perspective views as seen from the camera body side in the optical axis direction. It is. (A) to (d) are diagrams for explaining the order of attaching the third group lens frame 30 and the second group lens frame 20 to the fourth group lens barrel 40, and are perspective views viewed from the subject side in the optical axis direction. is there. FIG. 5 is a perspective view of the second group lens frame 20, the third group lens frame 30, and the fourth group lens barrel 40 on the subject side in the optical axis direction and viewed from an angle different from FIG. FIG. 6 is a perspective view of a second group lens frame 20 ′, a third group lens frame 30 ′, and a fourth group lens barrel 40 ′ of a comparative form as viewed from the subject side in the optical axis direction.

Hereinafter, embodiments will be described with reference to the drawings and the like. FIG. 1 is a cross-sectional view along the optical axis OA of the lens barrel 1 of the embodiment. FIG. 2 is an exploded perspective view of the lens barrel 1.
In addition, although this embodiment demonstrates the lens-barrel 1 which can be attached or detached with respect to the camera body 2, it is not limited to this. The lens barrel and the camera body may be an integrated camera.

  The lens barrel 1 of the embodiment is a zoom lens including a first group lens L1, a second group lens L2, a third group lens L3, and a fourth group lens L4 in order from the subject side.

(1 group lens frame 10)
The first group lens L1 is a focus lens and is held by the first group lens frame 10. The first group lens frame 10 is attached to the subject side end of the first group lens sliding cylinder 11.
A trapezoidal male screw 12 that engages with a trapezoidal female screw 64 provided on an inner peripheral surface of a cam ring 60 to be described later is provided on the outer peripheral surface of the first group lens sliding cylinder 11 on the camera body 2 side.

(2 group lens frame 20, 3 group lens frame 30, 4 group lens cylinder 40)
The second group lens L2 is held by the second group lens frame 20, the third group lens L3 is held by the third group lens frame 30, and the fourth group lens L4 is held by the fourth group lens barrel 40. Details of the second group lens frame 20, the third group lens frame 30, and the fourth group lens barrel 40 will be described later.

(Guide bar 70)
The connecting sliding cylinder 100 and the third group lens frame 30 are guided straight by the guide bar 70. The guide bar 70 is a shaft-like member provided extending in the direction of the optical axis OA.
A guide bar holding plate 71 is disposed inside the end of the fourth group lens barrel 40 on the camera body 2 side. The guide bar holding plate 71 is screwed to the fixed cylinder 50 and holds the end of the guide bar 70 on the camera body 2 side.
The subject side end portion of the guide bar 70 is pivotally supported by a guide bar bearing portion 55 provided at the subject side end portion of a second extending portion 54 extending from a fixed cylinder 50 described later.

  The lens barrel 1 further includes a zoom ring 90 disposed on the outer peripheral side, a fixed cylinder 50 disposed on the inner peripheral side of the end of the zoom ring 90 on the camera body 2 side, and a cam ring 60.

(Zoom ring 90)
The zoom ring 90 is rotatably disposed on the outermost periphery of the lens barrel 1.
Cam followers 91 are provided on the subject side inner peripheral surface of the zoom ring 90 so as to protrude in a concave shape on the inner peripheral side at three locations in the circumferential direction. The three-dimensional cam 62 of the cam ring 60 is engaged with the cam follower 91.

  Further, the zoom ring 90 is provided with a circumferential groove 92 penetrating in the radial direction. The circumferential groove 92 is formed along the circumference. A rotation limiting pin 51 (described later) provided on the fixed cylinder 50 is inserted into the circumferential groove 92. The zoom ring 90 can be rotated in the circumferential direction by the length of the circumferential groove 92 while the movement in the optical axis OA direction is restricted by the rotation limiting pin 51.

  On the inner peripheral surface of the zoom ring 90 on the camera body 2 side, a sliding cylinder cam groove 45 and a sliding cylinder cam follower 22 of the fourth group lens cylinder 40 and a third group cam follower 32 of the third group lens frame 30 are respectively engaged. A third group cam groove 44 is formed.

(Fixed cylinder 50)
A fixed cylinder 50 is disposed on the inner peripheral side of the zoom ring 90 on the camera body 2 side.
The fixed cylinder 50 includes a cylindrical portion 50A on the camera body 2 side, a first extending portion 52, a second extending portion 54, and a third extending portion 59 extending from the cylindrical portion 50A to the subject side in the optical axis OA direction.

  A rectilinear guide groove 56 is provided at a position facing the guide bar 70 inside the fixed cylinder 50. Straight-forward keys 37 and 43 are provided on the connecting sliding cylinder 100 and the third group lens frame 30, which will be described later. By engaging these linearly moving keys 37 and 43 with the linearly guiding groove 56, the deflection of the lens sliding cylinder with the guide bar 70 as the center of rotation in the plane having the optical axis OA as the normal line is regulated.

A bayonet mount 85 for attaching to and detaching from the camera body 2 is attached to the end of the cylindrical portion 50A on the camera body 2 side.
On the outer peripheral surface of the cylindrical portion 50A on the camera body 2 side, a rotation limiting pin 51 that projects into the outer peripheral side is provided that engages with the circumferential groove 92 provided in the zoom ring 90.

(Cam ring 60)
A cam ring 60 is inserted into the front side of the fixed barrel 50 on the camera body 2 side of the zoom ring 90.
A first group straight key 61 is provided on the outer peripheral surface of the cam ring 60. The first group rectilinear key 61 engages with a first rectilinear groove 53 provided in the first extending portion 52 of the fixed cylinder 50 so that it can move rectilinearly in the direction of the optical axis OA.

The aforementioned three-dimensional cam 62 having the zoom locus of the first group lens sliding cylinder 11 is provided on the outer peripheral surface of the cam ring 60. The three-dimensional cam 62 is engaged with a cam follower 91 on the subject-side inner peripheral surface of the zoom ring 90. The three-dimensional cam 62 and the cam follower 91 are provided at three locations substantially equally in the circumferential direction.
The aforementioned trapezoidal female screw 64 is provided on the inner peripheral surface of the cam ring 60. The trapezoidal female screw 64 is engaged with the trapezoidal male screw 12 provided on the outer peripheral surface of the rear portion of the first group lens sliding cylinder 11.

(Tension coil spring 65)
A tension coil spring 65 is attached between the cam ring 60 and the cylindrical portion 50 </ b> A of the fixed cylinder 50.
The camera body 2 side of the tension coil spring 65 is fixed to a pin inserted from the outside to the inside of the cylindrical portion 50 </ b> A of the fixed cylinder 50. The subject side of the tension coil spring 65 is fixed to the end of the cam ring 60 on the camera body 2 side. The tension coil spring 65 extends in the direction of the optical axis OA, and an urging force is generated in the direction of the optical axis OA between the end of the cam ring 60 on the camera body 2 side and the pin of the cylindrical portion 50A.

Next, the second group lens frame 20, the third group lens frame 30, and the fourth group lens barrel 40 will be described.
FIGS. 3A to 3D are views for explaining the order of attaching the third group lens frame 30 and the second group lens frame 20 to the fourth group lens barrel 40, as viewed from the camera body side in the optical axis OA direction. FIG.
FIGS. 4A to 4D are diagrams for explaining the order of attaching the third group lens frame 30 and the second group lens frame 20 to the fourth group lens barrel 40, as viewed from the subject side in the optical axis OA direction. It is a perspective view.
5 is a perspective view of the second group lens frame 20, the third group lens frame 30, and the fourth group lens barrel 40 on the subject side in the optical axis OA direction and viewed from an angle different from that in FIG.

(2 group lens frame 20)
As shown in FIGS. 3D and 4D, the second group lens frame 20 is connected to the fourth group lens cylinder 40 to form a connected sliding cylinder 100.
As shown in FIG. 3A, the second group lens frame 20 extends to the camera body side in the optical axis OA direction from the outer periphery holding part 21 that holds the outer periphery of the second group lens L2, and the outer edge part of the outer periphery holding part 21. A first protrusion 26 and a second protrusion 27 are provided.
The 1st protrusion part 26 and the 2nd protrusion part 27 are arrange | positioned in the position spaced apart about 180 degree | times in the circumferential direction.
The first projecting portion 26 and the second projecting portion 27 have substantially the same shape, and have a substantially L shape such that one corner of the rectangular portion on the camera body side in the optical axis OA direction is cut out into a rectangle.

The inner side in the radial direction protrudes from the outer side of the side part along the optical axis OA on the side where the corner part of the first projecting part 26 is not cut away and the end part on the camera body side in the optical axis OA direction. Ribs 26a are formed. These side portions and end portions are in contact with a side surface where a first opening 23 of a fourth lens frame 40 described later is provided.
In addition, the second protrusion 27 is formed with rib portions 27a whose inner side in the radial direction protrudes from the outer side at both side portions along the optical axis OA and the end surface on the camera body side in the optical axis OA direction. . These side portions and end portions are also in contact with the side surface where the first opening 23 of the fourth lens frame 40 described later is provided.

(4 group lens barrel 40)
(First opening 23 and second opening 24)
The fourth group lens barrel 40 is provided with a first opening 23 and a second opening 24 through which the subject side in the optical axis OA direction passes, on the side surface. That is, the subject side of the fourth group lens tube 40 in the optical axis OA direction is not continuous in the circumferential direction and is divided into two parts.

(First opening 23)
The first opening 23 of the fourth group lens barrel 40 has two rectangular portions 23A and 23B positioned in the optical axis OA direction and the circumferential direction as shown in FIG. It has a shape that is shifted.
The rectangular portion 23B of the first opening 23 on the subject side in the optical axis OA direction passes through the subject side of the fourth group lens barrel 40 in the optical axis OA direction.
Further, the maximum width R1 in the direction perpendicular to the optical axis OA of the first opening 23 indicated by the alternate long and short dash line in FIG. 3A is smaller than the diameter R2 of the third group lens frame 30.

A first insertion portion 25 is disposed in a portion of the rectangular portion 23A on the camera body side of the first opening 23 that is shifted in the circumferential direction with respect to the rectangular portion 23B.
The first insertion part 25 includes a body side insertion part 25A and a subject side insertion part 25B.
The body side insertion portion 25A is disposed in a portion slightly spaced from the end portion on the camera body side in the optical axis OA direction in the rectangular portion 23A.
The subject side insertion portion 25B is provided on the subject side in the rectangular portion 23A optical axis OA direction.
The body side insertion portion 25A and the subject side insertion portion 25B are provided with holes 25a and 25b penetrating in the optical axis OA direction, respectively. The guide bar 70 is inserted through the holes 25a and 25b through fitting bushes.

As shown in FIG. 4, on the side surface along the optical axis OA where the first opening 23 of the fourth group lens barrel 40 is provided, the second group lens frame 20 shown in FIG. A step portion 23 a that engages with the rib portion 26 a of the one protruding portion 26 is provided.
The step portion 23a and the rib portion 26a are engaged and overlap each other when the second group lens frame 20 is mounted in the fourth group lens barrel 40. Thereby, the penetration | invasion of the light from the outer peripheral surface side to the inside of the 2nd group lens frame 20 and the 4th group lens cylinder 40 (connection sliding cylinder 100) is prevented (light-shielding).

(Second opening 24)
The second opening 24 (shown in FIGS. 4 and 5) provided in the fourth group lens barrel 40 has substantially the same shape as the first opening 23 and the same shape as the second protrusion 27, and the second opening 24. It has a substantially L shape that is closed when the protrusion 27 is engaged.
On the side surface of the portion of the fourth group lens barrel 40 where the second opening 24 is provided, a step portion 24a (FIG. 4) that engages with the rib portion 27a described above is provided.
The step portion 24a and the rib portion 27a are engaged and overlap each other when the second group lens frame 20 is mounted in the fourth group lens tube 40, whereby the second group lens frame 20 and the fourth group lens tube 40 (the connecting slide). Invasion of light from the outer peripheral surface side into the moving cylinder 100) is prevented (shielded).

Adjacent to the body side insertion portion 25 </ b> A of the fourth group lens barrel 40, a sliding barrel cam follower 22 protruding on the outer peripheral side is press-fitted and fixed. The sliding cylinder cam follower 22 passes through the hole of the fixed cylinder 50 and engages with a sliding cylinder cam groove 45 of a zoom ring 90 described later.
Further, as shown in FIG. 4, two positioning projections 46a and 46b are provided on the subject side end surface of the fourth group lens barrel 40 in the optical axis OA direction.

Further, as shown in FIG. 5, a linear key 43 is provided on the camera body side in the optical axis OA direction of the portion where the second opening 24 of the fourth group lens barrel 40 is provided.
The straight key 43 is engaged with the straight guide groove 56 of the fixed cylinder 50 shown in FIG. 2, and the swing of the coupled sliding cylinder 100 with the guide bar 70 as the rotation center in the plane having the optical axis OA as the normal line. Is regulated.

(3 group lens L3)
The third group lens frame 30 is disposed inside the connecting sliding cylinder 100.
A third group cam follower 32 projecting to the outer peripheral side is attached to the outer periphery of the third group lens frame 30. The third group cam follower 32 protrudes in the outer peripheral direction from the first opening 23 of the above-described fourth group lens barrel 40.
The third group cam follower 32 further passes through the hole of the fixed cylinder 50 and engages with the third group cam groove 44 of the zoom ring 90.

A second insertion portion 36 that protrudes outward from the outer periphery is provided on the outer periphery side of the third group lens frame 30.
As shown in FIG. 3A, the second insertion part 36 has a body side insertion part 36A on the camera body side in the optical axis OA direction and a subject side insertion part 36B on the subject side in the optical axis OA direction.
The second insertion part 36 (the body side insertion part 36A and the subject side insertion part 36B) is provided with holes 36a and 36b penetrating in the direction of the optical axis OA. The guide bar 70 is inserted into the holes 36a and 36b through fitting bushes.
Thereby, the straight movement of the third group lens frame 30 in the direction of the optical axis OA is guided.

A third group cam follower 32 is press-fitted and fixed to the third group lens frame 30 and is engaged with a third group cam groove 44 on the inner peripheral surface on the rear side of the cam ring 60.
The third group cam follower 32 is displaced from the second insertion portion 36 (body side insertion portion 36A and subject side insertion portion 36B) in the circumferential direction, and in the optical axis OA direction, the body side insertion portion 36A and subject side insertion portion 36B. Located between and.

As shown in FIG. 3, two positioning holes 28a and 28b (only 28b are shown) are provided on the camera body side end surface of the second group lens frame 20 in the optical axis OA direction.
The positioning projections 46a and 46b of the fourth group lens barrel 40 are press-fitted into the positioning holes 28a and 28b.

Further, as shown in FIG. 5, a rectilinear key 37 is provided on the outer periphery of the third group lens frame 30.
This linear advance key 37 is engaged with the linear advance guide groove 56 of the fixed barrel 50 shown in FIG. 2 together with the linear advance key 43 of the fourth group lens barrel 40, and the guide bar 70 in the plane having the optical axis OA as a normal line. The swing of the connected sliding cylinder 100 with the rotation center is restricted.

  A diaphragm mechanism 35 is screwed to the third group lens frame 30. The third group lens frame 30 includes an anti-vibration mechanism 80, and is provided with a power supply and anti-vibration control wiring 81 shown in FIGS.

Next, how to attach the third group lens frame 30 and the second group lens frame 20 to the fourth group lens barrel 40 will be described.
First, the diaphragm mechanism 35 is attached to the third group lens frame 30.
Then, as shown in FIGS. 3A and 4A, the third group lens frame 30 is disposed on the subject side in the optical axis OA direction of the fourth group lens barrel 40 to which the fourth group lens L4 is attached.
Next, the third group lens frame 30 is inserted into the fourth group lens cylinder 40 from the direction of the optical axis OA, and the state shown in FIGS. 3B and 4B is obtained.

  At this time, openings 23 and 24 penetrating the subject side in the optical axis OA direction are provided on the side surface of the fourth group lens barrel 40. For this reason, even if the 2nd penetration part 36 and the rectilinear key 37 protrude from the outer peripheral side of the 3 group lens frame 30, the 3 group lens frame 30 can be inserted from the optical axis OA direction, without interfering. .

  Further, the wiring 81 of the third group lens frame 30 can be inserted from the direction of the optical axis OA in the same manner as the third group lens frame 30 through a wiring opening 48 opened on the rear end face of the fourth group lens barrel 40. .

Then, as shown in FIGS. 3B and 4B, the third group lens frame 30 is rotated about the optical axis OA with respect to the fourth group lens barrel 40, and FIGS. Set to the state of c).
At this time, the body side insertion portion 36A of the third group lens frame 30 is inserted between the body side insertion portion 25A and the subject side insertion portion 25B of the fourth group lens barrel 40. The subject side insertion portion 36B of the third group lens frame 30 is inserted into a gap on the subject side in the optical axis OA direction of the subject side insertion portion 25B of the fourth group lens barrel 40.

Then, as shown in FIGS. 3D and 4D, the second group lens frame 20 is attached to the fourth group lens cylinder 40.
Here, the two positioning protrusions 46a and 46b provided on the subject side end surface of the fourth group lens barrel 40 in the optical axis OA direction are two positioning projections provided on the camera body side end surface of the second group lens frame 20 in the optical axis OA direction. The holes 28a and 28b (only 28b is shown in FIGS. 3A to 3C) are press-fitted.
As a result, the second group lens frame 20 is positioned and fixed with respect to the fourth group lens barrel 40.

In addition, as a method of fixing the second group lens frame 20 to the fourth group lens cylinder 40, in addition to press-fitting, a tape is affixed to a boundary portion of the outer periphery of the fitting adhesive, snap fit, the second group lens frame 20 and the connecting sliding cylinder 100. A method is also conceivable.
Advantages of each method are that the fitting and bonding can be firmly bonded, the snap-fit can be easily assembled with less man-hours, and the tape sticking can be disassembled and easily readjusted.

As described above, in the lens barrel 1 of the present embodiment, when the zoom ring 90 is rotated by the above configuration, the first group lens sliding cylinder 11, the connecting sliding cylinder 100, and the third group lens frame 30 move straight in the direction of the optical axis OA. Zooming is performed.
When the first lens group sliding cylinder 11 rotates and moves in the direction of the optical axis OA, focusing is also performed.

(Comparison form)
FIG. 6 is a perspective view of the second group lens frame 20 ′, the third group lens frame 30 ′, and the fourth group lens barrel 40 ′ of the comparative example viewed from the subject side in the optical axis OA direction.

In the comparative form, the first opening 23 ′ does not penetrate the subject side of the fourth group lens barrel 40 ′ in the optical axis OA direction. That is, the subject side of the fourth group lens barrel 40 ′ in the optical axis OA direction covers the entire circumference.
Further, the maximum width R1 ′ in the cross section perpendicular to the optical axis OA of the first opening 23 ′ is larger than the diameter R2 ′ of the third group lens frame 30 ′.

In the assembly process of the comparative form, the third group lens frame 30 ′ is inserted from the first opening 23 ′ of the fourth group lens barrel 40 ′ from the direction orthogonal to the optical axis OA.
However, when the third group lens frame 30 ′ and the aperture mechanism are integrated, the parts to be inserted into the first opening 23 ′ are large, and the fourth group lens cylinder 40 ′ cannot be inserted due to interference of the parts.

  Therefore, in the comparative embodiment, the third group lens frame 30 ′ is inserted from the first opening 23 ′ of the fourth group lens barrel 40 ′, and the aperture mechanism 35 ′ is inserted from the subject side in the optical axis OA direction of the fourth group lens barrel 40 ′. To do. Then, these are screwed in the fourth lens barrel 40 '.

For this reason, according to the comparative form, it is difficult to maintain the assembly accuracy of the third group lens frame 30 ′ and the aperture mechanism 35 ′, and the number of assembly steps increases.
Further, since the maximum width R1 ′ in the direction perpendicular to the optical axis OA of the first opening 23 ′ is larger than the diameter R2 ′ of the third group lens frame 30 ′, the fourth group lens barrel 40 ′ and the second group lens frame 20 ′. Even when the combined sliding cylinder is configured as a unit, the strength of the connected sliding cylinder 100 is weak.

However, according to the embodiment, the openings 23 and 24 are provided in the fourth group lens barrel 40, and the openings 23 and 24 penetrate one end of the fourth group lens barrel 40.
Therefore, even if the second insertion portion 36 and the straight key 37 protrude from the outer peripheral side of the third group lens frame 30, the third group lens frame 30 can be inserted from the direction of the optical axis OA without interference.
Thereby, assembly becomes easy, for example, automatic assembly is also possible. Furthermore, the wiring can be easily handled.

  The maximum width R1 of the first opening 23 in the direction perpendicular to the optical axis OA is smaller than the diameter R2 of the third group lens frame 30. Therefore, when the fourth group lens barrel 40 and the second group lens frame 20 are integrated to form the coupled sliding barrel 100, the coupled sliding barrel 100 is strong.

Furthermore, according to the embodiment, the openings 23 and 24 are provided in the fourth group lens cylinder 40, and the openings 23 and 24 penetrate one end of the fourth group lens cylinder 40.
However, the second lens group frame 20 is provided with a first protrusion 26 and a second protrusion 27 that extend toward the camera body side in the optical axis OA direction.
The first projecting portion 26 and the second projecting portion 27 are a part of the first opening 23 when the fourth group lens tube 40 and the second group lens frame 20 are assembled to form the connected sliding tube 100. And since the 2nd opening part 24 is covered, the intensity | strength of the connection sliding cylinder 100 can be improved.

  Furthermore, when the 1st protrusion part 26 and the 2nd protrusion part 27 cover a part of 1st opening part 23 and the 2nd opening part 24, the step part 23a and the rib part 26a mutually engage and overlap. And the step part 24a and the rib part 27a mutually engage and overlap. Thereby, the penetration | invasion of the light from the outer peripheral side to the inside of the 2nd group lens frame 20 and the 4th group lens cylinder 40 (connection sliding cylinder 100) is prevented (light-shielding).

Two positioning projections 46a and 46b provided on the subject side end surface of the fourth group lens barrel 40 in the optical axis OA direction are provided with two positioning holes 28a provided on the end surface of the second group lens frame 20 in the optical axis OA direction on the camera body side. It is press-fitted into 28b (only 28b is shown).
As a result, the second group lens frame 20 is positioned and fixed with respect to the fourth group lens barrel 40.

  As described above, various modifications and changes are possible without being limited to the embodiments described above, and these are also within the scope of the present invention.

  L1: 1 group lens, L2: 2 group lens, L3: 3 group lens, L4: 4 group lens, OA: optical axis, 1: lens barrel, 2: camera body, 10: 1 group lens frame, 20: first lens 1 holding part, 20: 2 group lens frame, 23: first opening part, 23: opening part, 23a: step part, 24: second opening part, 24a: step part, 25: first insertion part, 26: first part 1 projecting portion, 26a: rib portion, 27: second projecting portion, 27a: rib portion, 28a: positioning hole, 28b: positioning hole, 30: second holding portion, 30: third group lens frame, 36: second insertion 40: 4 group lens barrel, 46a: positioning projection, 46b: positioning projection, 81: wiring, 100: coupled sliding barrel

Claims (10)

A lens barrel having an optical system in which a first optical component, a second optical component, and a third optical component are arranged in order,
A first holding member that holds the first optical component; and a holding cylinder that holds the third optical component on one end side and has a first opening penetrating the other end side provided on a side surface, A connecting cylinder in which the first holding member is connected to the other end of the holding cylinder;
A second holding member that holds the second optical component and at least a part of the second holding member is disposed inside the connecting tube;
A lens barrel comprising: The lens barrel according to claim 1,
A lens barrel in which the maximum width in the direction perpendicular to the optical axis of the optical system in the first opening is smaller than the diameter of the second holding member. The lens barrel according to claim 1 or 2,
A guide bar extending parallel to the optical axis of the optical system;
The connecting cylinder has a first insertion part through which the guide bar is inserted in an outer peripheral surface;
The second holding member protrudes outward from the first opening of the connecting cylinder, and has a second insertion part through which the guide bar is inserted. The lens barrel according to any one of claims 1 to 3,
The first holding member is a lens barrel having a first projecting portion that projects in the optical axis direction and at least a part of which engages with the first opening. The lens barrel according to any one of claims 1 to 4,
A lens barrel in which a side surface of the holding cylinder is provided with a second opening that extends through the other end and is different from the first opening. The lens barrel according to claim 5,
The first holding member is a lens barrel having a second protruding portion that protrudes in the optical axis direction and that has at least a portion engaged with the second opening. The lens barrel according to claim 5 or 6,
The holding barrel has a lens barrel having an engaging portion that engages with an end portion of the first holding portion on at least one of end surfaces divided by the first opening portion and the second opening portion.   An optical device comprising the lens barrel according to claim 1. A method for manufacturing a lens barrel in which a first holding member that holds a first optical component, a second holding member that holds a second optical component, and a third optical component are arranged,
The second holding member is inserted into the holding cylinder from the other end side of the holding cylinder in which the third optical component is held on one end side and an opening extending through the other end side is provided on the side surface. ,
A method for manufacturing a lens barrel, wherein the first holding member is connected to the other end of the holding cylinder. It is a manufacturing method of the lens barrel according to claim 9,
A method of manufacturing a lens barrel in which a diaphragm member is attached to the second holding member before the second holding member is inserted into the holding tube.

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