Lens support structure and lens barrel including the same, and camera

Abstract

To provide a lens support structure that can prevent the occurrence of distortion of a lens caused by an external factor and accurately execute adjustment of an optical axis of the lens, and a lens barrel including the same, and a camera.SOLUTION: A lens support structure 50 comprises a lens main body 51, a lens frame 53, an auxiliary frame 52, and adhesives A1, A2. The lens frame 53 holds the lens main body 51 on its inner peripheral side. The auxiliary frame 52 is provided between an outer peripheral part of the lens main body 51 and an inner peripheral surface of the lens frame, and at least part of which is deformed more easily than the lens main body 51. The adhesive A1 bonds and fixes the lens main body 51 and part of the auxiliary frame 52 to each other. The adhesive A2 bonds and fixes the auxiliary frame 52 and part of the lens frame 53 to each other.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a lens support structure that supports a lens included in, for example, a lens barrel of a camera, and a lens barrel and a camera that are provided with the same. [Background technology]

[0002] 2. Description of the Related Art In recent years, lens barrels equipped with an optical system including a plurality of lenses have come into use. Such lens barrels employ various adjustment mechanisms for adjusting the optical axes of the plurality of lenses. For example, Patent Document 1 discloses a method for adjusting a photographic lens consisting of, in order from the object side, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, and a fourth lens group having positive refractive power, in order to provide a low-cost photographic lens, optical device, and photographic lens adjustment method that can achieve good optical performance, in which a position adjustment is performed by shifting and decentering at least a part of the second lens group in a direction perpendicular to the optical axis. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-112716 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned conventional photographing lens adjustment method has the following problems. In other words, in the photographic lens adjustment method disclosed in the above publication, if, when adjusting the optical axis of the lens, the outer periphery of the lens is held by an adjustment arm for moving the lens in a small area, the holding force may distort the lens, which may have an adverse effect on the optical axis adjustment.

[0005] Furthermore, when the lens is fixed to the lens frame or the like using an adhesive, the lens may become distorted due to hardening and shrinkage of the adhesive, which may adversely affect the optical axis adjustment. Such lens distortion becomes particularly noticeable when a plastic lens is used instead of a glass lens. An object of the present disclosure is to provide a lens support structure that is capable of suppressing the occurrence of lens distortion due to external factors and accurately adjusting the optical axis of the lens, and a lens barrel and camera that are equipped with the same. [Means for solving the problem]

[0006] The lens support structure according to the present disclosure includes a lens, a substantially cylindrical lens frame, a substantially annular auxiliary frame, a first adhesive portion, and a second adhesive portion. The substantially cylindrical lens frame holds the lens on its inner peripheral surface. The substantially annular auxiliary frame is provided between the outer peripheral portion of the lens and the inner peripheral surface of the lens frame, and at least a portion of the auxiliary frame is more easily deformed than the lens body. The first adhesive portion adhesively fixes the outer peripheral portion of the lens to a portion of the inner peripheral portion of the auxiliary frame. The second adhesive portion adhesively fixes the outer peripheral portion of the auxiliary frame to a portion of the inner peripheral portion of the lens frame. Effect of the Invention

[0007] According to the lens support structure according to the present disclosure, the occurrence of lens distortion due to external factors can be suppressed, and the optical axis of the lens can be accurately adjusted. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an overall perspective view showing the configuration of a camera in which a lens barrel according to an embodiment of the present disclosure is attached to a camera body. [Diagram 2] FIG. 2 is a cross-sectional view of the lens barrel of FIG. 1. [Figure 3A] 3 is a cross-sectional view showing the lens barrel in FIG. 2 in a wide position. [Figure 3B] FIG. 3 is a cross-sectional view showing the lens barrel in FIG. 2 in a Tele position. [Figure 4A]3B is a cross-sectional view showing a state in which the cam followers of the third, fourth, and seventh group units are engaged with the cam grooves of the cam barrel at the Wide position in FIG. 3A. [Figure 4B] 3C is a cross-sectional view showing a state in which the cam followers of the third, fourth, and seventh group units are engaged with the cam grooves of the cam barrel at the Tele position in FIG. 3B. [Diagram 5] 2 is a schematic diagram showing the configuration of a lens support structure included in the lens barrel of FIG. 1. [Figure 6] 6 is a perspective view showing an auxiliary frame and a lens arranged on the inner peripheral side of a lens frame included in the lens support structure of FIG. 5. [Figure 7] 6 is a perspective view showing the configuration of a lens included in the lens support structure of FIG. 5. [Figure 8] 6 is a perspective view showing the configuration of an auxiliary frame included in the lens support structure of FIG. 5. [Figure 9] FIG. 13 is a perspective view showing a configuration of a lens according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or duplicate explanation of substantially the same configuration may be omitted. This is to avoid the following explanation becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. The applicant provides the accompanying drawings and the following description so that those skilled in the art can fully understand the present disclosure, and does not intend for them to limit the subject matter described in the claims.

[0010] (Embodiment 1) A lens barrel 100 including a lens support structure 50 according to an embodiment of the present disclosure and a camera 1 equipped with the same will be described below with reference to FIGS. 1 to 8. FIG. (1) Configuration of Lens Barrel 100 The configuration of a lens barrel 100 according to an embodiment of the present disclosure will be described below with reference to the drawings. Fig. 1 is a perspective view showing a camera 1 configured by attaching a lens barrel 100 according to this embodiment to a camera body 101.

[0011] Lens barrel 100 is a collapsible lens barrel that is detachably attached to camera body 101, as shown in FIG. As shown in FIG. 2, the lens barrel 100 mainly includes a linear barrel 11, a cam barrel 12, a first group unit 21, a second group unit 22, a third group unit 23, a fourth group unit 24, a fifth group unit 25, a sixth group unit 26, a seventh group unit 27, a focus ring 31, a zoom ring 32, and a base frame 40.

[0012] The lens barrel 100 also includes a lens support structure 50 that supports each lens group in a lens frame. The detailed configuration of the lens support structure 50 will be described later. First unit 21 is a substantially cylindrical member arranged on the outer circumferential surface side of linear motion cylinder 11, and holds first lens L1 at its end on the subject side in the direction of optical axis OP as shown in Fig. 2. First unit 21 is arranged closest to the subject side in the direction of optical axis OP of lens barrel 100.

[0013] As shown in FIG. 2, the first group unit 21 has a substantially cylindrical main body portion 21a and a cam follower 21b provided on the inner circumferential surface of the substantially cylindrical main body portion 21a. Cam follower 21b of first group unit 21 is provided near the subject side end of the inner peripheral surface of substantially cylindrical main body 21a so as to protrude radially inward from the outer peripheral surface. Cam follower 21b engages with a linear groove formed in linear cylinder 11 and cam groove 12d formed in cam cylinder 12, and moves first group unit 21 back and forth in the direction of optical axis OP as cam cylinder 12 rotates.

[0014] Second unit 22 is a substantially annular member contained within the inner peripheral surface side of linear motion barrel 11, and holds second lens L2 as shown in Fig. 2. Second unit 22 is disposed between first unit 21 and third unit 23 in the direction of optical axis OP of lens barrel 100. Second unit 22 is fixed to the subject-side end surface of linear motion barrel 11 using screws (not shown).

[0015] Third unit 23 is a substantially annular member contained within the inner circumferential surface side of linear cylinder 11, and holds third lens group L3 as shown in Fig. 2. Third unit 23 is disposed between second unit 22 and fourth unit 24 in the direction of optical axis OP of lens barrel 100. The third group unit 23 has a cam follower 23a (see FIG. 4A) provided so as to protrude radially outward from the outer circumferential surface.

[0016] Fourth group unit 24 is a substantially cylindrical member contained within the inner peripheral surface side of linear motion cylinder 11, and holds fourth group lens L4 as shown in Fig. 2. Fourth group unit 24 is disposed between third group unit 23 and fifth group unit 25 in the direction of optical axis OP of lens barrel 100. Fourth group unit 24 has cam followers 24a (see FIG. 4A) provided so as to protrude radially outward from the outer circumferential surface.

[0017] Fifth unit 25 is a substantially annular member contained within the inner peripheral surface side of linear barrel 11, and holds fifth group lens L5 as shown in Fig. 2. Fifth unit 25 is disposed between fourth unit 24 and sixth unit 26 in the direction of optical axis OP of lens barrel 100. Fifth unit 25 is attached in a state where it is suspended from fourth unit 24 by a guide shaft (not shown) one end of which is attached to fourth unit 24.

[0018] Sixth group unit 26 is a substantially annular member contained within the inner peripheral surface side of linear barrel 11, and holds sixth group lens L6 as shown in Fig. 2. Sixth group unit 26 is disposed between fifth group unit 25 and seventh group unit 27 in the direction of optical axis OP of lens barrel 100. Similar to fifth group unit 25, sixth group unit 26 is attached in a suspended state relative to fourth group unit 24 by a guide shaft (not shown).

[0019] Seventh group unit 27 is a substantially annular member contained within the inner peripheral surface side of linear motion cylinder 11, and holds seventh group lens L7 as shown in Fig. 2. Seventh group unit 27 is disposed on the image surface side opposite the subject side in the direction of optical axis OP of lens barrel 100. Seventh group unit 27 has cam followers 27a (see FIG. 4A) provided so as to protrude radially outward from the outer circumferential surface.

[0020] Here, the first to seventh lens groups L1-L7 held in the first to seventh unit groups 21-27 are arranged in this order from the subject side with the optical axis OP as the center axis. The lens barrel 100 moves the first, third to seventh unit groups 21, and 23-27 back and forth along the optical axis OP between the Wide position shown in Fig. 3A and the Tele position shown in Fig. 3B by rotating the zoom ring 32 described later.

[0021] That is, the lens barrel 100 is configured so that, when the zoom ring 32, which is rotatably attached to the outer circumferential surface of the base frame 40, is rotated, the cam barrel 12 rotates in conjunction with the rotation of the zoom ring 32. When the cam barrel 12 rotates, the lens barrel 100 drives the first, third to seventh group units 21, and 23-27 back and forth in the direction of the optical axis OP. 4A, the first-group, third-group, fourth-group, and seventh-group units 21, 23, 24, and 27 have a plurality of cam followers (cam followers 21b, 23a, 24a, and 27a) that respectively engage with a plurality of cam grooves formed in the cam barrel 12. The cam follower 21b of the first-group unit 21 engages with a linear groove 11d formed in the linear barrel 11. The cam followers 23a, 24a, and 27a of the third-group, fourth-group, and seventh-group units 23, 24, and 27 engage with a linear groove 11e formed in the linear barrel 11.

[0022] Furthermore, cam follower 21b of first unit 21 engages with cam groove 12d formed in cam barrel 12. Also, cam followers 23a, 24a, 27a of third, fourth, and seventh units 23, 24, 27 engage with cam grooves formed in cam barrel 12. As a result, when cam barrel 12 is rotated relative to linear barrel 11, first, third, fourth, and seventh group units 21, 23, 24, and 27 are driven relatively back and forth in the direction of optical axis OP between the Wide position shown in FIG. 4A and the Tele position shown in FIG. 4B.

[0023] (2) Configuration of lens support structure 50 Next, the configuration of the lens support structure 50 that supports the lenses included in the lens barrel 100 of this embodiment will be described in detail. The lens support structure 50 of the present embodiment is a structure that supports the first lens group L1 to the seventh lens group L7 in each lens frame of the first unit 21 to the seventh unit 27 described above, and is provided to suppress the occurrence of lens distortion due to external factors such as external force, and to accurately perform optical axis adjustment (centering) of the lens.

[0024] Note that the support structure for a generalized lens L will be described below with reference to Figs. 5 to 8, without being limited to a specific lens among the first to seventh lens groups L1 to L7 described above. As shown in FIG. 5, the lens support structure 50 of this embodiment includes a lens body 51, an auxiliary frame 52, and a lens frame 53. 5, the lens body 51 is configured to include a lens L in its central portion. As shown in FIG. 6, the lens body 51 is disposed on the inner periphery side of a substantially annular auxiliary frame 52.

[0025] 7, the lens body 51 is formed in a substantially circular plate shape and is fixed to the inner periphery of the auxiliary frame 52 via an adhesive (first adhesive) A1 that is applied to three points on the outer periphery at equal angular intervals (approximately 120 degrees). As a result, the lens body 51 is supported at three points on the inner periphery side of the auxiliary frame 52. The lens L included in the lens body 51 is molded from a transparent resin such as D4000.

[0026] A UV (Ultra Violet) curing adhesive is used as the adhesive (first adhesive) A1 that fixes the outer periphery of the lens body 51 and the inner periphery of the auxiliary frame 52. The adhesive A1 is cured in advance before the optical axis adjustment using the adjustment arm 60 described later, and fixes the lens body 51 and the auxiliary frame 52 together. 5 and 6, the auxiliary frame 52 is a substantially annular member, and is molded using a thermoplastic resin such as PC (polycarbonate) containing glass fiber. The auxiliary frame 52 is disposed between the outer periphery of the lens body 51 and the inner periphery of the lens frame 53. As shown in FIG. 6, the auxiliary frame 52 has a distortion absorbing portion 52a (thin portion 52aa and through hole 52ab) and an abutment surface (abutment portion) 52b. The auxiliary frame 52 is fixed to the inner periphery of the lens frame 53 and the outer periphery of the lens body 51 with a gap between them on the radial inside and outside, except for the portions to which the adhesives A1 and A2 are applied.

[0027] As a result, even if an external force is applied to the lens support structure 50, gaps are formed on the inside and outside in the radial direction so that the auxiliary frame 52 can easily deform, thereby preventing distortion of the lens body 51 due to deformation of the auxiliary frame 52 (distortion absorbing portion 52a). The adhesive (second adhesive) A2 that fixes the outer periphery of the auxiliary frame 52 and the inner periphery of the lens frame 53 is, for example, a UV (Ultra Violet) curing adhesive, similar to the adhesive A1. The adhesive A2 is cured in a state where the optical axis is adjusted using the adjustment arm 60 described later, and fixes the auxiliary frame 52 and the lens frame 53 together.

[0028] As shown in FIG. 8, the strain absorbing portions 52a are provided at six positions along the circumferential direction of the substantially annular auxiliary frame 52, and each have a thin portion 52aa and a through hole 52ab. The thin-walled portion 52aa is formed so as to have a smaller thickness in the radial direction than other portions of the auxiliary frame 52 where the strain absorbing portions 52a are not provided. The through hole 52ab is formed at a position radially adjacent to the thin portion 52aa so as to penetrate in the direction of the optical axis OP along the circumferential direction centered on the optical axis OP of the lens body 51. This allows the auxiliary frame 52 to be thinned at a desired position.

[0029] In the lens support structure 50 of this embodiment, in order to absorb the contraction of the adhesives A1, A2 applied respectively to the inner and outer periphery sides of the auxiliary frame 52, distortion absorbing portions 52a are provided at approximately equal angular intervals (approximately 120 degrees) in accordance with the application positions of the adhesives A1, A2. In particular, the adhesive A2 that is applied and hardened during optical axis adjustment is hardened by exposure to ultraviolet light after the optical axis adjustment of the lens L is performed using the adjustment arm 60, so there is a risk that the optical axis adjustment will be shifted due to the shrinkage of the adhesive A2 as it hardens.

[0030] That is, of the six distortion absorbing portions 52a arranged along the circumferential direction of the approximately annular auxiliary frame 52, three distortion absorbing portions 52a arranged at intervals of approximately 120 degrees are arranged to absorb distortion that occurs when the adhesives A1 and A2 shrink. As a result, even if the adhesive A1 applied on the inner side and the adhesive A2 applied on the outer side shrink when they solidify, the distortion absorbing portion 52a (thin portion 52aa) can absorb the external force, thereby effectively suppressing the impact on the lens body 51 that it supports on the inner side.

[0031] 8, the contact surface 52b is provided on the outer periphery of the auxiliary frame 52, and is contacted by an adjustment arm 60 for adjusting the optical axis of the lens body 51. The contact surfaces 52b are provided on the outer periphery of the distortion absorbing parts 52a in accordance with their positions. That is, of the six distortion absorbing sections 52a arranged along the circumferential direction of the approximately annular auxiliary frame 52, the remaining three distortion absorbing sections 52a, which are arranged at intervals of approximately 120 degrees, are provided to absorb distortions that occur when adjusting the optical axis using the adjustment arm 60.

[0032] As a result, even when adjusting the optical axis of lens L with the tip of adjustment arm 60 abutting against abutment surface 52b, distortion caused by external force applied from adjustment arm 60 can be absorbed by distortion absorbing portion 52a provided on the inner side of abutment surface 52b. As a result, even if an external force is applied from the adjustment arm 60 to the outer circumferential surface of the auxiliary frame 52 during optical axis adjustment, distortion of the lens body 51 can be effectively suppressed.

[0033] 5, the lens frame 53 is a substantially cylindrical member and, like the auxiliary frame 52, is molded using a thermoplastic resin such as PC (polycarbonate) containing glass fiber, and has greater strength than the auxiliary frame 52. The lens frame 53 has a recess (adjustment portion) 53a, into which an adjustment arm 60 for adjusting the optical axis is inserted, on an end face substantially perpendicular to the optical axis OP direction.

[0034] The recess 53a is provided at a position circumferentially shifted from the position at which the distortion absorbing portion 52a of the auxiliary frame 52 fixed to the inner periphery side of the lens frame 53 by the adhesive A2 is provided. As a result, when adjusting the optical axis of the lens L, the adjustment arm 60 is inserted into a position circumferentially shifted from the position where the adhesives A1, A2 are applied, and adjustment can be made while supporting the abutment surface 52b of the auxiliary frame 52 at three points.

[0035] <Main features> As described above, the lens support structure 50 of this embodiment includes the lens body 51, the substantially cylindrical lens frame 53, the substantially annular auxiliary frame 52, and adhesives A1 and A2. The substantially cylindrical lens frame 53 holds the lens body 51 on the inner periphery side. The substantially annular auxiliary frame 52 is provided between the outer periphery of the lens body 51 and the inner periphery surface of the lens frame 53, and at least a portion of it is more easily deformed than the lens body 51. The adhesive A1 bonds and fixes the outer periphery of the lens body 51 to a portion of the inner periphery of the auxiliary frame 52. The adhesive A2 bonds and fixes the outer periphery of the auxiliary frame 52 to a portion of the inner periphery of the lens frame 53.

[0036] That is, in the lens support structure 50 of this embodiment, the distortion absorbing portion 52a, which is more easily deformed than the lens body 51, is provided on the outer periphery of the lens body 51 including the lens L. The distortion absorbing portions 52a are provided to absorb distortion of the lens L caused by external forces applied from the outside (external forces from the adjustment arm 60, contraction of the adhesives A1 and A2, etc.). As shown in Fig. 5 and Fig. 6, a total of six distortion absorbing portions 52a are provided on the outer periphery of the substantially annular auxiliary frame 52, three on each side at intervals of approximately 120 degrees, in accordance with the positions where the adhesives A1 and A2 are applied and the position where the tip of the adjustment arm 60 used for adjusting the optical axis abuts.

[0037] As a result, distortions caused by the main external forces applied to the lens support structure 50 of this embodiment (the contraction forces of adhesives A1 and A2, the contact pressure of the adjustment arm 60, etc.) can be absorbed by the distortion absorbing portion 52a provided in the auxiliary frame 52. As a result, the distortion is absorbed by the distortion absorbing portion 52a of the auxiliary frame 52, and the influence of an external force that causes distortion in the lens body 51 is eliminated, making it possible to perform optical axis adjustment with high accuracy.

[0038] The strain absorbing portion 52a has a thin portion 52aa and a through hole 52ab. The through hole 52ab is formed at a position adjacent to the thin portion 52aa on the radially inner side. As a result, the thin-walled portion 52aa is formed as a portion having a thinner thickness in the radial direction of a circle centered on the optical axis OP compared to other portions of the auxiliary frame 52, and therefore has a lower strength and is more easily deformed than the lens body 51, which is an area where distortion is undesirable.

[0039] [Other embodiments] Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various modifications are possible without departing from the gist of the disclosure. (A) In the above embodiment, an example has been described in which the lens body 51 is supported on the inner peripheral surface of the lens frame 53 via the substantially annular auxiliary frame 52 provided on the outer peripheral side of the lens body 51. However, the present disclosure is not limited to this.

[0040] For example, as shown in FIG. 9, the present disclosure may be realized as a lens 150 in which an auxiliary frame is integrated with a lens body 151, that is, as a configuration without an auxiliary frame. As shown in FIG. 9, lens 150 has distortion absorbing portion 151a on the outer periphery of lens body 151, which is more easily deformed than lens body 151. As shown in FIG. 9, three distortion absorbing portions 151a are provided at intervals of approximately 120 degrees on the outer periphery of a substantially circular lens body 151.

[0041] The strain absorbing portion 151a has a thin portion 151aa and a through hole 151ab. The through hole 151ab is formed at a position adjacent to the thin portion 151aa on the radially inner side. As a result, the thin portion 151aa is formed with a thinner thickness than other portions of the outer periphery of the lens body 151, and has a lower strength than the portions of the lens body 151 and is more likely to deform.

[0042] Moreover, the distortion absorbing portion 151a (thin portion 151aa) is integrally molded with the lens body 151 on the outer periphery of the lens body 151 using the same resin. Here, as the resin for integrally molding the lens body 151 and the distortion absorbing portion 151a, for example, a transparent resin such as D4000 is used as in the above embodiment. Furthermore, on the outer periphery of the portion of the lens body 151 where the distortion absorbing portion 151a is provided, as shown in FIG. 9, an abutment surface (abutment portion) 151b is provided against which the adjustment arm 60 used to adjust the optical axis of the lens 150 abuts.

[0043] This allows the optical axis of the lens L to be adjusted while the adjustment arm 60 is in contact with the outer circumferential surface of the lens body 151 (the contact surface 151b). (B) The lens support structure 50 of the above embodiment has been described by way of example in which the lens body 51 is supported together with the auxiliary frame 52 by the inner circumferential surface of the lens frame 53. However, the present disclosure is not limited to this.

[0044] For example, the lens support structure may be such that the lens body including the strain absorbing portion is attached to something other than the lens frame. (C) In the above embodiment, an example has been described in which the thin portion 52aa is provided as a portion (distortion absorbing portion 52a) of the auxiliary frame 52 that is more easily deformed than the lens frame 53. However, the present disclosure is not limited to this.

[0045] For example, the distortion absorbing portion that absorbs distortion related to the lens body may be configured in other forms, such as being combined with a material that is easily deformed, in addition to being thin-walled with a thinner thickness than other portions. Further, the thin-walled portion may be configured to be thinned by a recess other than being adjacent to the through hole.

[0046] (D) In the above embodiment, the adhesives A1 and A2 provided as the first and second adhesive portions are arranged on the same straight line along the radial direction. However, the present disclosure is not limited to this example. For example, the first adhesive and the second adhesive may be provided at positions offset from each other in the circumferential direction.

[0047] (E) In the above embodiment, the adhesives A1 and A2 provided as the first adhesive portion and the second adhesive portion are the same UV-curable adhesive, but the present disclosure is not limited to this. For example, the first adhesive and the second adhesive may be different types of adhesives.

[0048] (F) In the above embodiment, an example has been described in which the lens body 51 is molded from resin. However, the present disclosure is not limited to this. For example, in a configuration in which the lens body is supported on the inner peripheral surface side of the lens frame via an auxiliary frame, the lens body may be made of glass.

[0049] However, since the occurrence of distortion due to external forces, etc. is an issue that is particularly likely to occur in plastic lenses, the contents of the present disclosure are more effectively applied to lens support structures that include plastic lenses. Furthermore, the resin lens body is not limited to the resin of D4000, and may be molded from other resins.

[0050] (G) In the above embodiment, an example has been described in which six strain absorbing portions 52a are provided at substantially equal angles (approximately 60 degrees) in the circumferential direction, but the present disclosure is not limited to this. For example, the arrangement of the thin portions is not limited to six at equal angular intervals, but may be at unequal angular intervals, and may be provided in five or fewer locations, or seven or more locations.

[0051] (H) In the above embodiment, an example has been described in which three strain absorbing portions 52a are provided at intervals of approximately 120 degrees on the auxiliary frame 52 as a countermeasure against the shrinkage of the adhesives A1 and A2 and a countermeasure against the contact pressure of the adjustment arm 60. However, the present disclosure is not limited to this. For example, the number of strain absorbing portions provided in different locations to which an external force is applied does not have to be the same.

[0052] (I) In the above embodiment, an example has been described in which the lens body 51 and the auxiliary frame 52, and the auxiliary frame 52 and the lens frame 53 are fixed to each other using adhesives A1 and A2, respectively. However, the present invention is not limited to this. For example, the lens body and the auxiliary frame, and the auxiliary frame and the lens frame may be fixed to each other using a means other than an adhesive.

[0053] (J) In the above embodiment, an example has been described in which the auxiliary frame 52 and the lens frame 53 are molded using a thermoplastic resin such as PC (polycarbonate) containing glass fiber. However, the present invention is not limited to this. For example, the auxiliary frame and the lens frame may be formed from different materials, or may be formed from materials different from each other. [Industrial Applicability]

[0054] The lens of the present disclosure has the effect of suppressing the occurrence of lens distortion due to external factors and enabling accurate adjustment of the optical axis of the lens, and is therefore widely applicable to various devices that include lenses. [Explanation of symbols]

[0055] 1 Camera 11 Straight-moving tube 11d Straight groove 11e Straight groove 12 Cam barrel 12d Cam groove 21 1st group unit 21a Main body 21b Cam follower 22 2nd group unit 23 3rd group unit 23a Cam follower 24 4th group unit 24a Cam follower 25 5th group unit 26 6 group unit 27 7th group unit 27a Cam follower 31 Focus ring 32 Zoom ring 40 Base Frame 50 Lens support structure 51 Lens body 52 Support slots 52a Strain absorbing section 52aa thin section 52ab through hole 52b Contact surface (contact part) 53 Lens frame 53a Recess (adjustment part) 60 Adjustable Arm 100 Lens barrel 101 Camera body 150 Lens 151 Lens body 151a Strain absorbing section 151aa Thin wall part 151ab through hole 151b Contact surface (contact part) A1 Adhesive (first adhesive part) A2 Adhesive (second adhesive part) L Lens L1~L7 1st to 7th lens groups OP optical axis

Claims

1. The lens body, a lens frame that holds the lens body on an inner peripheral surface side; an auxiliary frame provided between the outer periphery of the lens body and having a distortion absorbing portion at least in a part thereof which is more easily deformed than the lens body; a first adhesive portion that adhesively fixes the lens body and a part of the auxiliary frame; a second adhesive portion that adhesively fixes the auxiliary frame and a part of the lens frame; A lens support structure comprising:

2. The strain absorbing portion is provided in three portions at intervals of approximately 120 degrees. The lens support structure of claim 1 .

3. The first adhesive portion and the second adhesive portion are arranged on the same straight line along a radial direction centered on the optical axis of the lens body. The lens support structure according to claim 1 or 2.

4. the auxiliary frame is disposed with a gap in a radial direction with respect to an inner peripheral surface of the lens frame and an outer peripheral portion of the lens body, except for the first adhesive portion and the second adhesive portion; The lens support structure according to any one of claims 1 to 3.

5. The strain absorbing portion has a thin-walled portion. The lens support structure according to any one of claims 1 to 4.

6. The strain absorbing portion further has a through hole formed in a position adjacent to the thin portion along a circumferential direction centered on the optical axis of the lens body. The lens support structure of claim 5 .

7. the lens frame has an adjustment portion into which an adjustment arm for adjusting an optical axis of the lens body is inserted at a position circumferentially shifted from a position where the first adhesive portion and the second adhesive portion are provided. The lens support structure according to any one of claims 1 to 6.

8. The auxiliary frame has an abutment portion on its outer periphery against which the adjustment arm that adjusts the optical axis of the lens body abuts. The lens support structure of claim 7.

9. The lens body is a resin lens. A lens support structure according to any one of claims 1 to 8.

10. The lens support structure according to any one of claims 1 to 9, Equipped with a lens barrel.

11. The lens barrel according to claim 10; a camera body to which the lens barrel is attached; A camera equipped with.

Images