JP7401226B2 - Lens barrel and imaging device - Google Patents

Description

The present invention relates to a lens barrel and an imaging device , and more particularly to a lens barrel including a guide bar for guiding a lens holder.

2. Description of the Related Art Lens barrels are known that include a mechanism for guiding the movement of a lens holder in the optical axis direction using a guide bar. For example, Patent Document 1 describes a lens barrel including a guide mechanism including a lens holder, a guide bar, a first bar holding member, a second bar holding member, and a base member. Here, the lens holder holds the lens. The guide bar is inserted into the lens holder and guides the lens holder straight in the optical axis direction of the lens. The first bar holding member holds one end of the guide bar, and the second bar holding member holds the other end of the guide bar. The base member is formed with an opening into which the second bar holding member is inserted, and by moving the second bar holding member in a plane direction perpendicular to the optical axis and tilting the guide bar, the inclination of the lens can be adjusted. It is possible to adjust.

JP2018-77381A

However, in the technique described in Patent Document 1, the second bar holding member is always movably held with respect to the base member, so the adjustment of the second bar holding member is required for all lens barrels. It must be made.

An object of the present invention is to provide a lens barrel that is easy to assemble and has high optical performance.

The lens barrel according to the present invention includes a lens holder, a guide bar that guides the lens holder in the optical axis direction, a first holding member that holds one end of the guide bar, and a first holding member that holds the other end of the guide bar. a base member that holds the second holding member movably between a first position and a second position, and a base member that is disposed on the imaging surface side of the second holding member. a lens, wherein the second holding member is restricted from moving in a plane direction perpendicular to the optical axis direction with respect to the base member when in the first position; In this state, the second holding member is movable relative to the base member in a plane direction perpendicular to the optical axis direction, and a part of the second holding member overlaps the lens when viewed from the optical axis direction. It is characterized by the presence of

According to the present invention, it is possible to provide a lens barrel that is easy to assemble and has high optical performance.

1 is a sectional view of a lens barrel according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lens barrel of FIG. 1. FIG. It is a perspective view showing the structure of a bearing. FIG. 7 is a perspective view of the vicinity of an opening provided in the second fixed lens frame. FIG. 7 is a diagram illustrating the positional relationship between the second fixed lens frame and the bearing when viewed from the optical axis direction. FIG. 3 is a cross-sectional view showing a state in which a bearing is assembled into a second fixed lens frame. FIG. 3 is a top view illustrating tilt adjustment of the focus group. FIG. 3 is a perspective view illustrating tilt adjustment of a focus group.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view showing the structure of a lens barrel 10 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lens barrel 10.

The lens barrel 10 includes a first fixed lens group 100, a focus group 200, a second fixed lens group 300, a shake correction group 500, an aperture unit 600, a first adjustment lens group 700, and a second adjustment lens group 800.

The first fixed lens group 100 includes a first fixed lens 110, a first fixed lens frame 120 (first holding member), a main guide bar 130, and a sub guide bar 140. Note that the cross-sectional view in FIG. 1 shows the structure of the lens barrel 10 on a plane including the main guide bar 130 and the sub guide bar 140. The first fixed lens 110 is held approximately at the center of the first fixed lens frame 120. The first fixed lens frame 120 does not need to hold a lens if there is no need for optical design. Details of the main guide bar 130 and the sub guide bar 140 will be described later.

The first fixed lens group 100 includes a drive source 150, an FPC 170, a coil 180, a first magnetic shielding sheet metal 190, and a second magnetic shielding sheet metal 195. The first fixed lens frame 120 includes a pair of coils 180 and a pair of first magnets in the same phase as a pair of shake correction magnets 530 and a pair of yokes 540 held in the shake correction lens frame 520 constituting the shake correction group 500. A shield metal plate 190 is held. The first fixed lens frame 120 further holds a second magnetic shield metal plate 195 so as to cover the first magnetic shield metal plate 190.

The first fixed lens frame 120 includes three ball receiving surfaces (not shown) that come into contact with three balls (not shown), and hooks (not shown) on which one ends of thrust springs (not shown) are respectively hooked. ) is provided. The first fixed lens frame 120 has a main guide holding part 120a into which one end (subject side) of the main guide bar 130 is inserted and holds the main guide bar 130. The first fixed lens frame 120 also has a sub-guide holding portion 120b into which one end (subject side) of the sub-guide bar 140 is inserted and holds the sub-guide bar 140.

The first fixed lens frame 120 holds a second adjustment lens group 800 on the subject side through a plurality of second adjustment rollers 830, and the second adjustment lens group 800 holds a first adjustment lens group 800 through a plurality of first adjustment rollers 730. It holds an adjustment lens group 700. The first adjustment lens group 700 includes a first adjustment lens 710, a first adjustment lens frame 720, a first adjustment roller 730, and a first adjustment lens group screw. The second adjustment lens group 800 includes a second adjustment lens 810, a second adjustment lens frame 820, a second adjustment roller 830, a first adjustment roller insertion portion 840, and a second adjustment lens group screw.

The outermost circumference of the first adjustment roller 730 is eccentric with respect to the center of the first adjustment lens group screw, and is fitted into the first adjustment roller insertion portion 840 of the second adjustment lens frame 820 . By rotating the first adjustment roller 730, the first adjustment lens 710 can be moved and positioned to a desired position with respect to the second adjustment lens 810. Similarly, the outermost circumference of the second adjustment roller 830 is eccentric with respect to the center of the second adjustment lens group screw, and is fitted into the second adjustment roller insertion portion 120c of the first fixed lens frame 120. By rotating the second adjustment roller 830, the second adjustment lens 810 can be moved and positioned to a desired position with respect to the first fixed lens frame 120. By adjusting the inclination and eccentricity of the first adjustment lens 710 and the second adjustment lens 810 with respect to the imaging optical axis in this manner, good optical performance can be obtained.

The second fixed lens group 300 includes a second fixed lens 310, a second fixed lens frame 320 (base member), a cover 330, a screw 340, and a bearing 400 (second holding member). The second fixed lens frame 320 has an opening 320a into which the bearing 400 is inserted, and a sub-guide holding portion 320b into which the other end of the sub-guide bar 140 is inserted.

The cover 330 is attached to the second fixed lens frame 320 by bayonet coupling. The second fixed lens 310 is held on the second fixed lens frame 320 by a cover 330. In the lens barrel 10, the second fixed lens 310 is held by the second fixed lens frame 320 using the spring properties of a plurality of arms 330a provided on the cover 330. However, the configuration in which the second fixed lens frame 320 holds the second fixed lens 310 is not limited to this, and other configurations may be used. A specific method for holding the bearing 400 by the second fixed lens frame 320 will be described later.

The focus group 200 is a rectilinear moving group and is arranged between the first fixed lens group 100 and the second fixed lens group 300 in the optical axis direction. The focus group 200 includes a focus lens 210, a focus lens frame 220 (lens holder), a rack 230, a rack spring 240, and a mask 250. The focus lens frame 220 has a fitting part 220a into which the main guide bar 130 is slidably inserted, and a steady rest part 220b which engages with the sub guide bar 140. The rack 230 is rotatably held by the focus lens frame 220 and biased toward the lead screw 150a provided on the output shaft of the drive source 150 by the action of a rack spring 240.

When the drive source 150 is energized via the FPC 170, the focus group 200 is guided by the main guide bar 130 and the sub guide bar 140 by the action of the lead screw 150a and the rack 230, and moves to a predetermined position in the optical axis direction. do. As a result, the optical system of the lens barrel 10 is brought into focus on the subject. The optical image focused on the subject is formed on the imaging surface of an image sensor such as a CMOS sensor provided in an image sensor (not shown) to which the lens barrel 10 is attached, and the image sensor converts the image into an image by photoelectric conversion. Generate data. Note that the driving source 150 is, for example, a stepping motor, but is not limited thereto as long as it can move the focus group 200 to an arbitrary position.

The shake correction group 500 includes a shake correction lens 510, a shake correction lens frame 520, a pair of shake correction magnets 530, a pair of yokes 540, and a pair of position detection magnets. The shake correction lens 510, the pair of shake correction magnets 530, the pair of yokes 540, and the pair of position detection magnets are held in the shake correction lens frame 520. The pair of shake correction magnets 530 are arranged 90° apart from each other in the circumferential direction in a plane perpendicular to the optical axis. The pair of yokes 540 are arranged on the subject side in the optical axis direction so as to face the pair of shake correction magnets 530. The pair of position detection magnets are arranged at positions facing the pair of shake correction magnets 530 across the optical axis. Note that in the shake correction group 500, a position detection magnet is provided separately from the shake correction magnet 530, but depending on the configuration, the shake correction magnet 530 may be used to detect the position.

The shake correction lens frame 520 is provided with ball receiving surfaces (not shown) at three locations so as to contact each of three balls (not shown). Further, the shake correction lens frame 520 is provided with a hook (not shown) on which the other end of a thrust spring (not shown) whose one end is fixed to the hook of the first fixed lens frame 120 is hooked. A ball (not shown) is held between the ball receiving surface (not shown) of the first fixed lens frame 120 and the ball receiving surface (not shown) of the shake correction lens frame 520 by the urging force of a thrust spring (not shown). become in a state of being In this way, the shake correction lens frame 520 is arranged movably within a plane orthogonal to the optical axis.

The diaphragm unit 600 is arranged on the subject side of the shake correction group 500, and is held by the second fixed lens frame 320 with a screw (not shown).

Next, a method for correcting image blur in the lens barrel 10 will be explained. As described above, the first fixed lens frame 120 is provided with a pair of shake correction magnets 530 and a pair of coils 180 arranged in the same phase, a pair of first magnetic shield metal plates 190, and a flexible plate (not shown).

A position detection magnet (not shown) is mounted on the flexible cable (not shown), and a pair of Hall elements (not shown) are mounted in the same phase as the position detection magnet (not shown). When the coil 180 is energized, the Lorentz force generated between the coil 180 and the magnetism of the shake correction magnet 530 causes the shake correction group 500 to move relative to the first fixed lens group 100 in a plane perpendicular to the optical axis. Moving. The Hall element (not shown) detects the magnetic force of the position detection magnet (not shown), and based on the detection result, the control section of the imaging device main body (not shown) to which the lens barrel 10 is attached is connected to the first The position of the shake correction group 500 with respect to the fixed lens group 100 is determined.

A control unit of the imaging device main body (not shown) controls the voltage applied to the coil 180 based on image blur information from a gyro sensor (not shown) provided in the lens barrel 10 or the imaging device main body (not shown). , moves the shake correction group 500 in the direction of image shake correction within a plane perpendicular to the optical axis. As a result, even if vibrations such as camera shake occur, the image blur of the subject image formed on the image sensor (not shown) through the photographic optical system of the lens barrel 10 is corrected, and a still image with reduced image blur can be created. You can get moving images.

Note that when the coil 180 is energized, magnetism is generated between the coil 180 and the shake correction magnet 530. A first magnetic shield metal plate 190 is placed toward the image sensor in the same phase as the coil 180 so that the generated magnetism does not affect the image sensor (not shown). In order to further enhance the magnetic shielding effect, a second magnetic shielding sheet metal 195 is placed on the imaging element side of the first magnetic shielding sheet metal 190. In this embodiment, the second magnetic shielding sheet metal 195 is configured integrally so as to cover the pair of first magnetic shielding sheet metals 190, but is not limited to this, and may be divided into a plurality of pieces depending on the arrangement of each member. I don't mind if it becomes two.

Next, a method for adjusting the tilt of the focus group 200 will be described. FIG. 3 is a perspective view showing the configuration of the bearing 400, and the bearing 400 is viewed from different directions in FIGS. 3(a) and 3(b). FIG. 4 is a perspective view of the vicinity of the opening 320a provided in the second fixed lens frame 320.

The bearing 400 has a plurality of integrally formed collar portions 400a and a plurality of protrusions 400b. Note that when the bearing 400 is placed in the lens barrel 10 (held in the second fixed lens frame 320), the plurality of collar parts 400a and the plurality of protrusions 400b each correspond to the substantially cylindrical shape of the bearing 400. It is formed to protrude from the main body in a direction perpendicular to the optical axis. A holding portion 400c that holds the other end (imaging surface side) of the main guide bar 130 is provided on the protruding portion 400b side of the bearing 400. A fitting surface 400d is provided at the outermost periphery of the collar portion 400a. An abutment surface 400e that abuts the abutment surface 320c of the second fixed lens frame 320 is provided on the side of the protrusion 400b of the flange 400a. A groove portion (hereinafter referred to as “adhesion groove 400f”) used for bonding with the second fixed lens frame 320 is provided near the outer periphery of the side surface of the flange portion 400a opposite to the abutment surface 400e. A jig receiving surface 400g is provided between the flange portions 400a in the circumferential direction, against which a jig 20 (see FIG. 7) used when adjusting the inclination of the focus group 200 comes into contact.

The protruding portion 400b is provided on the holding portion 400c side that holds the main guide bar 130, and is provided between the flange portion 400a when viewed from the optical axis direction, that is, in the same phase as the jig receiving surface 400g. ing. In this embodiment, the bearing 400 has the same number of flange portions 400a and the same number of protrusions 400b, but they do not necessarily have to be the same number, and may be provided as many as necessary depending on the configuration of the lens barrel 10.

A regulating surface 400h is provided on the flange 400a side of the protrusion 400b. Although the protrusions 400b and the jig receiving surface 400g are provided in the same number and in the same phase, they may not be in the same number or in the same phase depending on the configuration.

The second fixed lens frame 320 has an abutting surface 320c that abuts an abutting surface 400e provided on the bearing 400 in a plane orthogonal to the optical axis, and a notch into which the protrusion 400b of the bearing 400 is inserted. It has 320d. The second fixed lens frame 320 also has a fitting surface 320e facing the opening 320a and an inner wall 320h provided between the fitting surface 320e. The second fixed lens frame 320 further includes a first adhesive portion 320f provided in the same phase as the fitting surface 320e, and a second adhesive portion 320g provided in the same phase as the inner wall 320h. A regulating surface 320i that is perpendicular to the optical axis is provided on the back side of the abutting surface 320c.

Next, the assembly process of the lens barrel 10 will be explained. First, one end (subject side) of the main guide bar 130 is inserted into the main guide holding part 120a of the first fixed lens frame 120, and one end (subject side) of the sub guide bar 140 is inserted into the sub guide holding part 120b. At this time, the fitting portion 220a of the focus lens frame 220 in which the focus lens 210, rack 230, rack spring 240, and mask 250 are assembled is inserted into the main guide bar 130 in advance. As a result, the focus group 200 is incorporated into the first fixed lens group 100.

Subsequently, the drive source 150 and the FPC 170 are assembled from the side surface of the second fixed lens frame 320 so that the rack 230 and the lead screw 150a are engaged with each other, and fixed to the second fixed lens frame 320 with the screws 160. Then, the second fixed lens frame 320 is assembled into the first fixed lens group 100 while inserting the other end (imaging surface side) of the sub guide bar 140 into the sub guide holding part 320b provided on the second fixed lens frame 320. . In this state, the second fixed lens frame 320 is fixed to the first fixed lens frame 120 with a plurality of screws 340. Thereafter, the bearing 400 is assembled into the opening 320a from the cover 330 side so that the projection 400b of the bearing 400 and the notch 320d are aligned in phase.

FIG. 5 is a diagram showing the positional relationship between the second fixed lens frame 320 and the bearing 400 as viewed from the optical axis direction. 5(a) shows the assembled phase of the bearing 400, FIG. 5(b) shows the assembled phase (first position) of the focus group 200 in the bearing 400 when no adjustment is made, and FIG. ) represents the assembly phase (second position) when adjusting the tilting of the focus group 200 in the bearing 400. FIG. 6 is a cross-sectional view showing a state in which the bearing 400 is assembled into the second fixed lens frame 320. FIG. 6A shows the engagement state between the bearing 400 and the second fixed lens frame 320 at the first position shown in FIG. 5B. FIG. 6(b) shows the engaged state of the bearing 400 and the second fixed lens frame 320 in the second position of FIG. 5(c).

As shown in FIG. 5A, when the bearing 400 is inserted into the opening 320a of the second fixed lens frame 320, the other end (imaging surface side) of the main guide bar 130 is inserted into the holding part 400c. . When the bearing 400 is inserted into the opening 320a, the abutting surface 320c of the second fixed lens frame 320 and the abutting surface 400e of the bearing 400 come into contact with each other. Note that both the abutment surface 320c and the abutment surface 400e are planes perpendicular to the optical axis.

The second fixed lens frame 320 holds a bearing 400 so as to be movable in the directions of arrows 30 and 40. When the bearing 400 is rotated in the direction of the arrow 30 from the assembled phase state shown in FIG. 5(a), the bearing 400 is rotated in the direction shown in FIGS. Move to position 1. When the bearing 400 is in the first position, the fitting surface 400d of the bearing 400 fits with the fitting surface 320e of the second fixed lens frame 320. Further, the regulating surface 400h of the bearing 400 contacts the regulating surface 320i of the second fixed lens frame 320.

When the bearing 400 is held in the first position by the second fixed lens frame 320, movement of the bearing 400 in a plane perpendicular to the optical axis direction is restricted, and the bonding groove 400f of the bearing 400 and the second fixed lens frame The first adhesive portions 320f of 320 are in the same phase and can be bonded. Therefore, by applying a predetermined adhesive near the adhesive groove 400f and the first adhesive part 320f, the bearing 400 can be adhered and fixed to the second fixed lens frame 320.

When the bearing 400 is rotated in the direction of the arrow 40 from the assembled phase state shown in FIG. Move to the position. When the bearing 400 is in the second position, the fitting surface 400d of the bearing 400 faces the inner wall 320h of the second fixed lens frame 320, and the adhesive groove 400f of the bearing 400 and the second adhesive part of the second fixed lens frame 320 are connected to each other. 320g are in the same phase and bonding becomes possible. Therefore, by applying a predetermined adhesive near the adhesive groove 400f and the second adhesive portion 320g, the bearing 400 can be adhesively fixed to the second fixed lens frame 320.

Further, when the bearing 400 is in the second position, the abutting surface 400e of the bearing 400 abuts the abutting surface 320c of the second fixed lens frame 320. In the second fixed lens frame 320, since the diameter of the inner wall 320h is larger than the diameter of the fitting surface 320e, a gap 50 is formed between the fitting surface 400d and the inner wall 320h. The regulating surface 400h of the bearing 400 does not exist at a position facing the regulating surface 320i of the second fixed lens frame 320, and a gap 60 is formed on the imaging surface side of the regulating surface 320i.

That is, when the bearing 400 is held in the second position by the second fixed lens frame 320, only the abutting surface 400e of the bearing 400 abuts the abutting surface 320c of the second fixed lens frame 320, and the optical axis It is in a state where it is movable in a plane direction perpendicular to the . In this state, when the bearing 400 is moved to an arbitrary position within a plane perpendicular to the optical axis using the jig 20 (see FIG. 7), the main guide bar 130 is moved because the bearing 400 holds the main guide bar 130. The focus group 200 is tilted. In this way, by moving the bearing 400 to any position within a plane perpendicular to the optical axis, the tilting of the focus group 200 can be adjusted.

Here, the construction method described in Japanese Patent Application Laid-Open No. 2018-77381 (Patent Document 1) described as a conventional technique will be confirmed. In the construction method of Patent Document 1, the state in which the adjustment piece is held in the fifth group lens barrel is similar to the state in which the bearing 400 is in the second position in this embodiment. In other words, in the conventional construction method, by adjusting the position of the adjustment piece relative to the 5th group base, the guide bar falls down and the inclination of the 4th group lens barrel is adjusted. In such a configuration, since there is no part that restricts movement of the adjustment piece in a plane direction perpendicular to the optical axis, tilt adjustment must be performed for all lens barrels.

In contrast, in the lens barrel 10 according to the present embodiment, when the bearing 400 is rotated in the direction of the arrow 30, which is the first position, the bearing 400 becomes fixed to the second fixed lens frame 320. . In this state, the tilt of the focus group 200 is inspected. As a result, if it is confirmed that the collapse satisfies a predetermined standard, a predetermined adhesive is applied to the adhesive groove 400f and the first adhesive portion 320f. Thereby, the bearing 400, which adjusts the tilting of the focus group 200, can be firmly fixed.

On the other hand, as a result of checking the tilting of the focus group 200 with the bearing 400 moved to the first position, if the predetermined standard is not met, the bearing 400 is rotated in the direction of the arrow 40 and the focus group 200 is moved to the second position. and adjust the inclination using the jig 20. Then, a predetermined adhesive is applied to the adhesive groove 400f and the second adhesive portion 320g to fix the bearing 400 to the second fixed lens frame 320. In other words, the tilt adjustment of the focus group 200 only needs to be performed when the bearing 400 cannot be fixed at the first position, which simplifies the process of adjusting the tilt of the focus group 200 and increases productivity. becomes possible.

As a result of such adjustment, the adhesive is applied to either the adhesive groove 400f and the first adhesive part 320f or the adhesive groove 400f and the second adhesive part 320g, and the bearing 400 is fixed to the second fixed position. It is fixed to the lens frame 320.

By the way, the diameter of the fitting surface 400d of the bearing 400 is R_400d, the diameter of the outer periphery 400i is R400i, the diameter of the inner wall 320h of the second fixed lens frame 320 is r_320h, and the diameter of the inner periphery 320j is r_320j. Then, the relationship “R_400d−r_320h<r320j−R400i” holds true.

Thereby, when the bearing 400 is moved in a plane direction perpendicular to the optical axis, the fitting surface 400d of the bearing 400 becomes a movement regulating surface and comes into contact with the inner wall 320h of the second fixed lens frame 320. In other words, the fitting surface 400d and the inner wall 320h are in the closest positional relationship in the plane direction orthogonal to the optical axis in a state where the inclination can be adjusted. Further, as described above, an adhesive groove 400f is provided on the imaging surface side of the fitting surface 400d, and a second adhesive portion 320g is provided in the same phase as the inner circumference 320j. Therefore, when the bearing 400 is rotated in the direction of the arrow 40 to adjust the inclination, the bonding groove 400f and the second bonding portion 320g are brought closest to each other, so that bonding can be performed efficiently.

Here, the configuration of the lens barrel in the prior art (Japanese Unexamined Patent Publication No. 2018-77381 (Patent Document 1)) will be confirmed again. In the lens barrel described in Patent Document 1, since the adjustment piece is disposed outside the lens in the optical axis direction, the lens barrel becomes larger (longer). In contrast, in the present embodiment, the bearing 400 and the main guide bar 130 are located on the subject side of the second fixed lens 310, and a portion of the bearing 400 overlaps the second fixed lens 310 when viewed from the optical axis direction. It is arranged as follows. Therefore, the lens barrel 10 can be made smaller (shorter).

FIG. 7 is a diagram illustrating adjustment of the bearing 400 (adjustment of inclination of the focus group 200) using the jig 20 when viewed from the imaging surface side. FIG. 8 is a perspective view showing how the bearing 400 is adjusted by the jig 20. As shown in FIG. As shown in FIG. 7, when the bearing 400 is in the second position, the protrusion 400b and the notch 320d are arranged so that the abutting surface 320c is not arranged toward the optical axis. As a result, when adjusting the inclination of the focus group 200, the jig 20 does not hang on the optical axis (the jig 20 does not overlap the optical axis when viewed from the optical axis direction), making it easy to adjust the inclination. becomes possible.

10 Lens barrel 120 First fixed lens frame 130 Main guide bar 200 Focus group 310 Second fixed lens 320 Second fixed lens frame 320c Abutting surface (of the second fixed lens frame) 320e Fitting (of the second fixed lens frame) Fitting surface 320f First adhesive part 320g Second adhesive part 320i Regulating surface 400a Flange 400b Projection 400d Fitting surface (of the collar) 400e Abutment surface (of the collar) 400f Adhesive groove 400g Jig receiving surface 400h Regulating surface

Claims (8)

lens holder and
a guide bar that guides the lens holder in the optical axis direction;
a first holding member that holds one end of the guide bar;
a second holding member that holds the other end of the guide bar;
a base member that holds the second holding member movably between a first position and a second position;
a lens disposed on the imaging surface side of the second holding member,
The second holding member is restricted from moving in a plane direction perpendicular to the optical axis direction with respect to the base member when it is in the first position, and the second holding member is restricted from moving in a plane direction perpendicular to the optical axis direction when it is in the second position. It is possible to move in a plane direction perpendicular to the optical axis direction ,
A lens barrel characterized in that a portion of the second holding member overlaps the lens when viewed from the optical axis direction . The second holding member is
a plurality of flange portions protruding in a direction perpendicular to the optical axis direction;
a plurality of protrusions that protrude in a direction perpendicular to the optical axis direction at positions different from the flange in the optical axis direction,
Each of the plurality of collar portions is
A mating surface provided on the outermost periphery;
an abutment surface provided on one surface perpendicular to the optical axis direction,
The plurality of protrusions are
a regulating surface provided in a direction opposite to the abutting surface;
The base member is
an opening and
a fitting surface facing the opening and fitting with the fitting surface of the collar when the second holding member is in the first position;
an abutment surface that is perpendicular to the optical axis direction and that comes into contact with the abutment surface of the flange when the second holding member is in the first position;
Claim 1, further comprising: a regulating surface provided on the opposite side of the abutment surface and abutting against a regulating surface of the protrusion when the second holding member is in the first position. The lens barrel described in . 3. The lens barrel according to claim 2 , wherein the protrusion is provided between the flange parts when viewed from the optical axis direction. According to claim 2 or 3 , wherein when the second holding member is in the second position, the abutting surface of the second holding member and the abutting surface of the base member are in contact with each other. Lens barrel as described. A groove is formed near the outer periphery of a surface opposite to the abutting surface of the flange,
The base member is
a first adhesive portion provided in the same phase as the fitting surface of the base member;
a second adhesive part provided at a different phase from the first adhesive part,
When the second holding member is in the first position, the groove portion and the first adhesive portion are located in the same phase, and when the second holding member is in the second position, the groove portion and the first adhesive portion are in the same phase. 5. The lens barrel according to claim 2 , wherein the second adhesive portions are located in the same phase . 6. The lens barrel according to claim 5 , wherein an adhesive is applied to any one of the groove portion and the first adhesive portion, or the groove portion and the second adhesive portion. The second holding member has a jig receiving surface provided between the plurality of flanges and in the same phase as the protrusion,
The lens mirror according to any one of claims 2 to 6 , wherein the jig receiving surface does not face the optical axis direction when the second holding member is in the second position. Tube. The lens barrel according to any one of claims 1 to 7 ,
An imaging device comprising: an imaging element that converts an optical image formed through the lens barrel into image data.

Images