Lens barrel and imaging device equipped with same

Abstract

A lens barrel is provided that can reduce the number of parts by simplifying the configuration of a lens holding frame that holds a first lens group and to which an optical filter is attached. [Solution] A lens barrel (10) includes a lens (L1), a lens holding frame (11a), and an annular lens retaining plate (11c). The lens holding frame (11a) has a substantially cylindrical flange (11ab), an annular threaded portion (11ba) to which an optical filter is attached, and an engagement portion (11bb) disposed on the flange (11ab) opposite the subject in the direction of the optical axis (AX) from the threaded portion (11ba). The engagement portion (11bb) protrudes radially inward from the inner surface of the flange (11ab) beyond the threaded portion (11ba) centered on the optical axis (AX), and holds the lens (L1). The annular lens retaining plate (11c) is attached to the inner surface of the flange (11ab) so as to abut against the lens (L1) from the subject side in the direction of the optical axis (AX). The engagement portion (11cb) protrudes radially outward and engages with the engagement portion (11bb).

Description

[Technical Field]

[0001] The present disclosure relates to a lens barrel and an imaging device including the same. [Background technology]

[0002] For example, Patent Document 1 discloses a lens barrel having good optical performance, which includes a first lens holding frame that holds a first lens, a first guide shaft that guides the first lens holding frame in the optical axis direction, a contact member that contacts the first guide shaft, and a biasing member that contacts the first lens holding frame and biases the contact member toward the first guide shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 124364 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-described conventional lens barrel has the following problems. That is, in the lens barrel disclosed in the above publication, in order to hold the first lens group which is positioned closest to the subject, a lens pressing member for stably holding the heavy first lens group, a filter screw member for enabling the attachment of an optical filter, etc. are attached to the subject side of the first lens frame.

[0005] Such a configuration has the problem of increasing the number of parts and making the configuration complicated. The object of the present disclosure is to provide a lens barrel and an imaging device equipped with the same that can reduce the number of parts by simplifying the configuration of the lens holding frame that holds the first lens group and to which an optical filter is attached. [Means for solving the problem]

[0006] The lens barrel according to the present disclosure includes a first lens group, a lens holding frame, and an annular lens pressing member. The first lens group is disposed closest to the subject in the optical axis direction. The lens holding frame has a substantially cylindrical first main body portion, an annular screw portion provided on the inner circumferential surface of the first main body portion on the subject side in the optical axis direction and to which an optical filter is attached, and a first engagement portion disposed on the opposite side of the screw portion of the first main body portion from the subject in the optical axis direction and protruding from the inner circumferential surface of the first main body portion in an inward radial direction about the optical axis beyond the screw portion, and holds the first lens group. The annular lens pressing member is attached to the inner circumferential surface of the first main body portion of the lens holding frame so as to abut against the first lens group from the subject side in the optical axis direction, and has a second engagement portion protruding in an outward radial direction and engaging with the first engagement portion. [Effects of the Invention]

[0007] According to the lens barrel according to the present disclosure, the configuration of the lens holding frame that holds the first lens group and to which the optical filter is attached can be simplified, thereby reducing the number of parts. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an overall perspective view showing a state in which a lens barrel according to an embodiment of the present disclosure is detachably attached to a camera body; [Figure 2] FIG. 2 is a perspective view showing the configuration of the lens barrel of FIG. [Figure 3] FIG. 2 is an exploded perspective view showing the configuration of the lens barrel of FIG. [Figure 4] FIG. 4 is a perspective view showing the configuration of a first unit included in the lens barrel of FIG. 3. [Figure 5] FIG. 5 is an exploded perspective view showing the configuration of the first group unit in FIG. 4. [Figure 6] FIG. 5 is a cross-sectional view of the first group unit in FIG. 4. [Figure 7] FIG. 7 is an enlarged cross-sectional view of part A in FIG. 6. [Figure 8A] 5 is a view of a lens holding frame included in the first unit of FIG. 4, viewed from the subject side in the optical axis direction. [Figure 8B] Cross-sectional view taken along line BB in FIG. 8A. [Figure 9A] FIG. 5 is a view of the lens retainer plate included in the first unit of FIG. 4, viewed from the subject side in the optical axis direction. [Figure 9B] 9A is a projection view of FIG. 9A seen from the bottom. [Figure 10] FIG. 5 is a perspective view showing the configuration of a cosmetic ring included in the first unit of FIG. 4. [Figure 11A] 10B is a perspective view showing a state in which a lens pressing plate is attached to the lens holding frame before the decorative ring of FIG. 10A is attached. [Figure 11B] 11B is an enlarged view showing the position where adhesive is injected when a lens pressing plate is attached to the lens holding frame of FIG. 11A. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, more detailed description than necessary may be omitted. For example, detailed description of well-known matters or redundant description of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. The applicant provides the accompanying drawings and the following description to enable those skilled in the art to 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 10 according to an embodiment of the present disclosure and a camera (imaging device) 50 including the same will be described below with reference to FIGS. 1 to 11B. (1) Configuration of camera 50 A camera (imaging device) 50 according to this embodiment includes a lens barrel 10 and a camera body 51, as shown in FIG.

[0011] Lens barrel 10 is detachably attached to camera body 51. The detailed configuration of lens barrel 10 will be described later. Camera body 51 captures an image of a subject via lens barrel 10 using an imaging element (not shown) mounted inside, and generates image data. (2) Overall Configuration of Lens Barrel 10 Lens barrel 10 according to this embodiment is detachably attached to camera body 51. As shown in FIGS. 2 and 3 , lens barrel 10 includes first unit 11, second unit 12, third unit 13, fourth-fifth unit 14, sixth unit 17, linear guide barrel 15, cam barrel 20, and exterior unit 16.

[0012] 2 and 3, first unit 11 is a substantially cylindrical member that is located closest to the subject in the direction of optical axis AX among the components that make up lens barrel 10, and holds lens (first lens group) L1 on its inner peripheral surface. First unit 11 has a cam follower (not shown) that moves while engaged with cam grooves 21 of cam barrel 20, which will be described later, and is moved back and forth in the direction of optical axis AX as cam barrel 20 rotates relative to linear guide barrel 15.

[0013] The detailed configuration of first group unit 11 will be described later. 3, second unit (second lens frame) 12 holds lens L2 and moves back and forth in the direction of optical axis AX on the inner peripheral surface side of linear guide barrel 15 in accordance with relative rotation of cam barrel 20 with respect to linear guide barrel 15. Second unit 12 has a substantially cylindrical main body 12a and cam followers 12b that protrude radially outward about optical axis AX.

[0014] Three cam followers 12b are arranged at approximately equal angular intervals (approximately 120 degrees) on the outer circumferential surface of the approximately cylindrical main body 12a. Cam followers 12b move while engaged with cam grooves 22 of cam barrel 20 (described later), thereby moving second group unit 12 back and forth in the direction of optical axis AX as cam barrel 20 rotates relative to linear guide barrel 15. As shown in FIG. 3, third unit 13 holds lens L3, and has a substantially cylindrical main body 13a, a cam follower 13b, and an aperture unit 13c.

[0015] Three cam followers 13b are arranged at approximately equal angular intervals (approximately 120 degrees) on the outer circumferential surface of the approximately cylindrical main body 13a. Cam followers 13b move while engaged with cam grooves 23 of cam barrel 20 (described later), thereby moving third group unit 13 back and forth in the direction of optical axis AX as cam barrel 20 rotates relative to linear guide barrel 15. The aperture unit 13c is arranged on the subject side of the main body 13a in the direction of the optical axis AX, and adjusts the amount of light incident from the subject side that passes through the lens barrel 10 by opening and closing aperture blades (not shown) to change the opening area.

[0016] The fourth-fifth group unit (first lens frame) 14 is a linear focus unit that adjusts the focal length by moving the fourth-fifth group lenses L4 and L5, such as focus lenses, contained therein back and forth in the direction of the optical axis AX when, for example, a focus ring 16b rotatably attached to the outer circumferential surface of the exterior unit 16 is rotated. As shown in Fig. 3, the fourth-fifth group unit 14 holds the lenses L4 and L5 and has a substantially cylindrical main body 14a and a cam follower 14b.

[0017] Three cam followers 14b are arranged at approximately equal angular intervals (approximately 120 degrees) on the outer circumferential surface of the approximately cylindrical main body 14a. The cam followers 14b move while engaged with cam grooves 24 of the cam barrel 20 (described later), thereby moving the fourth-fifth group unit 14 back and forth in the direction of the optical axis AX as the cam barrel 20 rotates relative to the linear guide barrel 15. 3, sixth unit 17 holds lens L6 and moves back and forth in the direction of optical axis AX on the inner peripheral surface side of linear guide barrel 15 in accordance with relative rotation of cam barrel 20 with respect to linear guide barrel 15. Sixth unit 17 has a substantially cylindrical main body 17a and cam followers 17b that protrude radially outward about optical axis AX.

[0018] Three cam followers 17b are arranged at approximately equal angular intervals (approximately 120 degrees) on the outer circumferential surface of the approximately cylindrical main body 17a. Cam followers 17b move while engaged with cam grooves 25 of cam barrel 20 (described later), thereby moving sixth group unit 17 back and forth in the direction of optical axis AX as cam barrel 20 rotates relative to linear guide barrel 15. 3, the linear guide barrel 15 is a substantially cylindrical member disposed adjacent to the inner peripheral surface of the cam barrel 20, and the above-mentioned second group unit 12, third group unit 13, fourth-fifth group unit 14, and sixth group unit 17 are disposed on the inner peripheral surface of the linear guide barrel 15. The linear guide barrel 15 has a substantially cylindrical main body portion 15a and linear grooves 15b.

[0019] The rectilinear groove 15b is a through groove formed along the optical axis AX direction, and moves in an engaged state with the cam followers 12b, 13b, and 14b provided on the second group unit 12, the third group unit 13, the fourth-fifth group unit 14, and the sixth group unit 17, etc. Cam barrel 20 is a substantially cylindrical member formed from aluminum, for example, and is arranged on the outer peripheral surface side of linear guide barrel 15 as shown in Fig. 3, and drives second group unit 12, third group unit 13, fourth-fifth group unit 14, and sixth group unit 17 back and forth in the direction of optical axis AX by rotating relatively to linear guide barrel 15. As shown in Fig. 3, cam barrel 20 has a substantially cylindrical main body portion 20a and a plurality of cam grooves 21, 22, 23, 24, and 25 formed in main body portion 20a.

[0020] The cam barrel 20 is constructed by forming cam grooves 21, 22, 23, 24, and 25 in a substantially cylindrical aluminum member by cutting. As shown in Figures 2 and 3, exterior unit 16 is a roughly cylindrical member that constitutes the exterior portion of lens barrel 10, and has annular zoom ring 16a, focus ring 16b, etc. attached to its outer circumferential surface in a rotatable manner along the circumferential direction.

[0021] 2 and 3, zoom ring 16a is a substantially annular member provided near the center of exterior unit 16 in the direction of optical axis AX, and is rotated to move lens barrel 10 from the WIDE position to the TELE position. As zoom ring 16a rotates, cam barrel 20 rotates, causing first group unit 11, second group unit 12, third group unit 13, fourth-fifth group unit 14, etc. to move back and forth in the direction of optical axis AX.

[0022] 2 and 3, focus ring 16b is a substantially annular member provided on the outer peripheral surface of exterior unit 16 at a position adjacent to zoom ring 16a on the subject side in the direction of optical axis AX, and changes the position of focus lenses (lenses L4 and L5) in the direction of optical axis AX. Rotation of focus ring 16b rotates cam barrel 20, thereby moving fourth-fifth group unit 14 back and forth in the direction of optical axis AX.

[0023] (3) Configuration of 1st group unit 11 In lens barrel 10 of this embodiment, as shown in FIG. 3, first unit 11 is disposed closest to the subject in the direction of optical axis AX. As shown in FIGS. 4 and 5, the first unit 11 includes a lens (first lens group) L1, a lens holding frame 11a, a lens pressing plate (lens pressing member) 11c, and a decorative ring 11d.

[0024] The lens holding frame 11a holds the lens L1, and has a substantially cylindrical portion 11aa and a flange portion (first main body portion) 11ab. As shown in FIG. 4, the cylindrical portion 11aa is a substantially cylindrical portion provided on the opposite side of the subject in the direction of the optical axis AX, and contains, on its inner peripheral surface side, the second group unit 12, the third group unit 13, and the fourth-fifth group unit 14, which move back and forth in the direction of the optical axis AX.

[0025] The flange portion (first main body portion) 11ab is a substantially cylindrical portion connected to the cylindrical portion 11aa on the subject side in the direction of the optical axis AX and holding the lens L1. The inner peripheral surface of the flange portion 11ab is provided with a screw-fitting portion 11ba to which an optical filter (not shown) is attached, an engagement portion (first engagement portion) 11bb to which a lens pressing plate 11c is attached, and a recess (first locking portion) 11bc provided in the engagement portion 11bb.

[0026] As shown in FIG. 5, the screw portion 11ba is disposed on the inner circumferential surface of the flange portion 11ab closest to the subject in the direction of the optical axis AX, and has an annular thread on which an optical filter (not shown) is attached. 5, the engagement portion (first engagement portion) 11bb is disposed adjacent to the screw engagement portion 11ba on the flange portion 11ab on the opposite side from the subject in the direction of the optical axis AX. The engagement portions 11bb are provided at three locations on the inner peripheral surface of the flange portion 11ab at approximately equal angular intervals so as to protrude from the inner peripheral surface of the flange portion 11ab further than the screw engagement portion 11ba in the inner diameter direction centered on the optical axis.

[0027] 6 and 7, the screw-engaging portion 11ba and the engaging portion 11bb are arranged on the same inner circumferential surface of the flange portion 11ab of the lens holding frame 11a. Furthermore, the screw-engaging portion 11ba and the engaging portion 11bb are integrally molded as part of the lens holding frame 11a. Furthermore, as shown in Figures 8A and 8B, the engagement portion 11bb has a convex portion (first convex portion) 11bb1 and a convex portion (second convex portion) 11bb2 formed side by side in the direction of the optical axis AX on the inner surface of the lens holding frame 11a.

[0028] As shown in Figure 8B, the convex portion (second convex portion) 11bb2 has an inclined surface (inclination θ1) formed obliquely with respect to the circumferential direction of the inner surface of the lens holding frame 11a on the surface that engages with the engagement portion 11cb of the lens pressing plate 11c. When attaching the lens pressing plate 11c to the lens holding frame 11a, the engagement portion 11bb provided on the lens holding frame 11a shown in FIG. 8A is aligned with the recessed portion of the lens pressing plate 11c shown in FIG. 9A where the engagement portion 11cb is not provided, and then the lens pressing plate 11c is fitted into the lens holding frame 11a from the subject side in the direction of the optical axis AX and rotated circumferentially.

[0029] At this time, the engaging portion 11cb of the lens pressing plate 11c moves along the inclined surface of the engaging portion 11bb (convex portion 11bb1) of the lens holding frame 11a. As shown in Figure 7, the convex portion 11bb2 abuts against the engagement portion 11cb on the image surface side of the lens retaining plate 11c without any gap in the direction of the optical axis AX, so that the lens retaining plate 11c abuts against the lens L1, and the lens L1 is held without any rattling regardless of variations in the thickness of the lens L1.

[0030] 7, the engagement portion 11cb on the subject side of the lens retainer plate 11c is disposed with a gap between it and the convex portion 11bb1. The convex portion 11bb1 is provided for reinforcement purposes to prevent the lens retainer plate 11c from coming off due to impact or the like. The recess (first locking portion) 11bc is a groove provided along the optical axis AX direction on the engagement portion 11bb provided on the inner surface of the flange portion 11ab, and engages with the protrusion (second locking portion) 11d (see Figure 10) provided on the decorative ring 11d side described later.

[0031] As shown in Fig. 5, the lens retaining plate (lens retaining member) 11c is a substantially annular member for retaining the lens L1 included in the first unit 11 between itself and the subject-side surface of the flange portion 11ab. As shown in Fig. 6, the lens retaining plate 11c abuts against the lens L1 from the subject-side in the direction of the optical axis AX. The lens retaining plate 11c is attached to the inner circumferential surface of the flange portion 11ab of the lens holding frame 11a. The lens retaining plate 11c has a substantially annular main body portion 11ca and an engagement portion (second engagement portion) 11cb.

[0032] The engaging portion (second engaging portion) 11cb protrudes radially outward from the outer peripheral surface of the substantially annular main body 11ca and engages with the engaging portion 11bb on the lens holding frame 11a side. As described above, the engaging portion 11cb is fitted into the lens holding frame 11a from the subject side in the direction of the optical axis AX while being aligned with the recess of the lens pressing plate 11c shown in FIG. 9A where the engaging portion 11cb is not provided, and the lens pressing plate 11c is rotated in the circumferential direction, whereby the engaging portion 11cb moves to a position where it overlaps with the engaging portion 11bb as viewed from the direction of the optical axis AX.

[0033] As a result, the movement of the lens pressing plate 11c in the direction of the optical axis AX is restricted, and the lens pressing plate 11c is fixed to the lens holding frame 11a by bayonet coupling. The engagement portion 11cb is inserted between the engagement portions 11bb (the convex portion (first convex portion) 11bb1 and the convex portion (second convex portion) 11bb2 shown in FIGS. 8A and 8B) provided on the lens holding frame 11a. As shown in FIGS. 9A and 9B, the engagement portion 11cb has an inclined surface (inclination θ2) formed obliquely with respect to the circumferential direction of the outer peripheral surface of the lens pressing plate 11c on the surface that abuts against the convex portion 11bb1 or the convex portion 11bb2.

[0034] This makes it possible to easily insert the engagement portion 11cb between the engagement portions 11bb (convex portions 11bb1, 11bb2) of the lens holding frame 11a when the lens pressing plate 11c is attached to the lens holding frame 11a. As shown in Fig. 5, the cosmetic ring 11d is a substantially annular member and is attached to the lens holding frame 11a on the subject side in the direction of the optical axis AX. As shown in Fig. 10, the cosmetic ring 11d has a substantially annular main body portion (second main body portion) 11da, a convex portion (second locking portion) 11db, and a specification display portion 11dc (see Fig. 5).

[0035] The substantially annular main body 11da has a spec display section 11dc formed on the surface facing the subject in the direction of the optical axis AX, and a convex section 11db formed on the surface opposite to the subject. The convex portion (second locking portion) 11db is formed along the optical axis AX on the surface of the substantially annular main body portion 11da on the attachment side to the lens holding frame 11a, and engages with the concave portion 11bc. The spec display section 11dc lists various specs such as the focal length of the lens barrel 10, the maximum aperture F-number, and the filter diameter.

[0036] Here, when the convex portion 11db of the cosmetic ring 11d is locked in the concave portion 11bc of the lens holding frame 11a, the rotation of the cosmetic ring 11d is restricted, and therefore the orientation of the cosmetic ring 11d is defined. This allows the orientation of the decorative ring 11d to be set so that the characters describing the specifications of the lens barrel 10 and the like are easy to read when the camera 50 is in the normal position.

[0037] Furthermore, as shown in FIG. 11A, the decorative ring 11d is attached after adhesive is injected into adhesive injection position X shown in FIG. 11B in a state where the lens pressing plate 11c is attached to the lens holding frame 11a. The adhesive injection position X is provided in the gap between the outer peripheral surface of the substantially annular lens pressing plate 11c and the inner peripheral surface of the flange portion 11ab.

[0038] This allows the lens pressing plate 11c to be fixed in the rotation direction around the optical axis AX by the adhesive, and also allows the decorative ring 11d to be fixed. <Major features> As shown in FIG. 7 , the lens barrel 10 of this embodiment includes a lens L1, a lens holding frame 11a, and an annular lens retaining plate 11c. The lens L1 is positioned closest to the subject in the direction of the optical axis AX. The lens holding frame 11a has a substantially cylindrical flange portion 11ab, an annular screw-type engagement portion 11ba that is provided on the inner circumferential surface of the flange portion 11ab on the subject side in the direction of the optical axis AX and to which an optical filter is attached, and an engagement portion 11bb that is provided on the opposite side of the screw-type engagement portion 11ba of the flange portion 11ab from the subject in the direction of the optical axis AX and that protrudes radially inward from the inner circumferential surface of the flange portion 11ab beyond the screw-type engagement portion 11ba, centered on the optical axis AX. The lens holding frame 11a retains the lens L1. The annular lens retaining plate 11c is attached to the inner circumferential surface of the flange portion 11ab of the lens holding frame 11a so as to abut against the lens L1 from the subject side in the direction of the optical axis AX. The engagement portion 11cb protrudes radially outward and engages with the engagement portion 11bb.

[0039] As a result, the screw-fitting portion 11ba to which the optical filter is attached and the engagement portion 11bb to which the lens pressing plate 11c that holds the lens L1 is attached are integrally formed on the lens holding frame 11a, thereby simplifying the configuration of the first group unit 11. As a result, the configuration of first unit 11 can be simplified and the number of parts can be reduced. [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.

[0040] (A) In the above embodiment, an example has been described in which the engagement portion 11bb provided on the inner peripheral surface of the lens holding frame 11a and the engagement portion 11cb provided on the outer peripheral surface of the lens pressing plate 11c attached to the inner peripheral surface of the lens holding frame 11a are fixed by a bayonet connection, but the present disclosure is not limited to this.

[0041] For example, the method of fixing the lens pressing member to the lens holding frame is not limited to bayonet coupling, and other fixing methods such as screw engagement may be used. (B) In the above embodiment, an example has been described in which the rotation of the cosmetic ring 11d about the optical axis AX is restricted by inserting the convex portion 11db provided on the cosmetic ring 11d into the concave portion 11bc provided on the lens holding frame 11a of the first unit 11. However, the present disclosure is not limited to this.

[0042] For example, the first locking portion provided on the decorative ring side may be a concave portion, and the second locking portion provided on the lens holding frame side may be a convex portion. (C) In the above embodiment, an example has been described in which the decorative ring 11d is fixed to the lens holding frame 11a to which the lens pressing plate 11c is attached by adhesive injected into the adhesive injection position X. However, the present disclosure is not limited to this.

[0043] For example, the decorative ring may be configured to be fixed by forming an engagement relationship with the lens holding frame side or the lens pressing member. (D) In the above embodiment, an example was described in which various specifications such as the focal length, maximum aperture F-number, and filter diameter of the lens barrel 10 are written on the specification display portion 11dc of the decorative ring 11d. However, the present disclosure is not limited to this.

[0044] For example, the spec display portion of the cosmetic ring may be configured to include other information such as the lens configuration, maximum magnification, maximum shooting distance, weight, size, and product name. (E) In the above embodiment, an example was described in which the configuration of the present disclosure is applied to lens barrel 10 that is detachably attached to camera body 51. However, the present invention is not limited to this.

[0045] For example, the configuration of the present disclosure may be applied to a lens barrel that is fixed in an undetachable state to a camera body. <Additional Notes> The above description of the embodiments discloses the following techniques. (Technology 1) The lens barrel according to Technology 1 is a first lens group disposed closest to the subject in the optical axis direction; a lens holding frame that holds the first lens group, the lens holding frame having: a substantially cylindrical first main body portion; an annular screw portion that is provided on an inner circumferential surface of the first main body portion on the subject side in the optical axis direction and to which an optical filter is attached; and a first engagement portion that is located on the opposite side of the screw portion of the first main body portion from the subject in the optical axis direction and that protrudes from the inner circumferential surface of the first main body portion in an inner diameter direction centered on the optical axis beyond the screw portion; an annular lens pressing member attached to an inner peripheral surface side of the first main body portion of the lens holding frame so as to abut against the first lens group from the subject side in the optical axis direction, the lens pressing member having a second engaging portion that protrudes in an outer radial direction and engages with the first engaging portion; It is equipped with:

[0046] (Technology 2) The lens barrel according to Technology 2 is the lens barrel according to Technology 1, The screw portion and the first engagement portion are disposed on the same inner circumferential surface of the first main body portion of the lens holding frame. (Technology 3) The lens barrel according to Technology 3 is the lens barrel according to Technology 1 or 2, The screw portion and the first engagement portion are integrally formed.

[0047] (Technology 4) A lens barrel according to a fourth aspect of the present invention is a lens barrel according to any one of the first to third aspects of the present invention, The lens holding frame has a first locking portion provided on the inner circumferential surface of the first main body portion along the optical axis direction. (Technology 5) A lens barrel according to a fifth aspect of the present invention is the lens barrel according to the fourth aspect of the present invention, The lens holder has a second main body portion that is approximately annular, and a second locking portion that is formed along the optical axis direction on the surface of the second main body portion that is attached to the lens holding frame and engages with the first locking portion, and further includes a decorative ring attached to the subject side of the lens holding frame in the optical axis direction.

[0048] (Technology 6) The lens barrel according to Technology 6 is the lens barrel according to Technology 4, The first locking portion is provided on the first engaging portion. (Technology 7) The lens barrel according to Technology 7 is the lens barrel according to Technology 5, When the first locking portion and the second locking portion are locked together, the orientation of the decorative ring is defined.

[0049] (Technology 8) The lens barrel according to Technology 8 is the lens barrel according to Technology 7, The decorative ring further has a spec display portion that displays the specs of the lens barrel and is provided on the surface facing the subject in the optical axis direction. (Technology 9) A lens barrel according to a ninth aspect of the present invention is a lens barrel according to any one of the first to eighth aspects of the present invention, the first engagement portion has a first convex portion and a second convex portion formed side by side in the optical axis direction on an inner circumferential surface of the lens holding frame, The first convex portion has an inclined surface formed obliquely with respect to the circumferential direction of the inner circumferential surface of the lens holding frame on a surface that engages with the second engaging portion of the lens pressing member.

[0050] (Technology 10) A lens barrel according to a tenth aspect of the present invention is the lens barrel according to the ninth aspect of the present invention, The second engagement portion of the lens pressing member is inserted between the first convex portion and the second convex portion. (Technology 11) A lens barrel according to an eleventh aspect of the present invention is the lens barrel according to the tenth aspect of the present invention, The second engagement portion has an inclined surface formed obliquely with respect to the circumferential direction of the outer circumferential surface of the lens pressing member on a surface that abuts against the first convex portion or the second convex portion.

[0051] (Technology 12) A lens barrel according to a twelfth aspect of the present invention is a lens barrel according to any one of the first to eleventh aspects of the present invention, The first engagement portion engages the lens holding frame with the lens pressing member by bayonet coupling.

[0052] (Technology 13) The imaging device according to technology 13 is A lens barrel according to any one of techniques 1 to 12; a camera body to which the lens barrel is attached; It is equipped with: [Industrial Applicability]

[0053] The lens barrel of the present disclosure has the effect of simplifying the configuration of the lens holding frame to which the optical filter is attached and which holds the first lens group, and is therefore widely applicable to various lens barrels that are attached to imaging devices. [Explanation of symbols]

[0054] 10 Lens barrel 11 1st group unit 11a Lens holding frame 11aa Cylindrical part 11ab flange portion (first main body portion) 11ba threaded part 11bb Engagement portion (first engagement portion) 11bb1 Convex part (first convex part) 11bb2 Convex part (second convex part) 11bc Recess (first locking portion) 11c Lens holding plate (lens holding member) 11ca main body 11cb Engagement part (second engagement part) 11d Cosmetic ring 11da main body (second main body) 11db Convex part (second locking part) 11dc spec display 12 2nd group unit 12a Main body 12b Cam follower 13 3rd group unit 13a Main body 13b Cam follower 13c aperture unit 14 4th and 5th group unit 14a Main body 14b Cam follower 15 Straight guide tube 15a Main body 15b Straight groove 16 Exterior unit 16a Zoom ring 16b Focus ring 17 6th group unit 17a Main body 17b Cam follower 20 Cam barrel 20a Main body 21, 22, 23, 24, 25 Cam groove 50 Camera (imaging device) 51 Camera body AX optical axis L1 lens (first lens group) L2~L5 lenses X Adhesive injection position θ1,θ2 tilt

Claims

1. a first lens group disposed closest to the subject in the optical axis direction; a lens holding frame that holds the first lens group, the lens holding frame having: a substantially cylindrical first main body portion; an annular threaded portion that is provided on an inner circumferential surface of the first main body portion on the subject side in the optical axis direction and to which an optical filter is attached; and a first engagement portion that is located on the opposite side of the threaded portion of the first main body portion from the subject in the optical axis direction and that protrudes from the inner circumferential surface of the first main body portion in an inner diameter direction centered on the optical axis beyond the threaded portion; an annular lens pressing member attached to an inner peripheral surface side of the first main body portion of the lens holding frame so as to abut against the first lens group from the subject side in the optical axis direction, the lens pressing member having a second engaging portion that protrudes in an outer radial direction and engages with the first engaging portion; A lens barrel comprising:

2. the screw portion and the first engagement portion are disposed on the same inner circumferential surface of the first main body portion of the lens holding frame, The lens barrel according to claim 1 .

3. The screw portion and the first engagement portion are integrally formed.

3. The lens barrel according to claim 1.

4. the lens holding frame has a first locking portion provided along the optical axis direction on an inner circumferential surface of the first main body portion, 3. The lens barrel according to claim 1.

5. the lens holder further includes a decorative ring having a substantially annular second main body portion, and a second locking portion formed along the optical axis direction on a surface of the second main body portion on the side where the lens holder frame is attached and engaging with the first locking portion, the decorative ring being attached to the lens holder frame on the subject side in the optical axis direction; The lens barrel according to claim 4.

6. The first locking portion is provided on the first engagement portion. The lens barrel according to claim 4.

7. When the first locking portion and the second locking portion are locked together, the orientation of the decorative ring is determined. The lens barrel according to claim 5 .

8. The decorative ring further includes a spec display portion that displays the specs of the lens barrel and is provided on a surface facing the subject in the optical axis direction. The lens barrel according to claim 7.

9. the first engagement portion has a first convex portion and a second convex portion formed side by side in the optical axis direction on an inner circumferential surface of the lens holding frame, the first convex portion has an inclined surface formed obliquely with respect to the circumferential direction of the inner circumferential surface of the lens holding frame on a surface that engages with the second engaging portion of the lens pressing member; 3. The lens barrel according to claim 1.

10. the second engagement portion of the lens pressing member is inserted between the first convex portion and the second convex portion; The lens barrel according to claim 9.

11. the second engagement portion has an inclined surface formed obliquely with respect to the circumferential direction of the outer peripheral surface of the lens pressing member, on a surface that abuts against the first convex portion or the second convex portion; The lens barrel according to claim 10.

12. the first engagement portion engages the lens holding frame with the lens pressing member by bayonet coupling; 3. The lens barrel according to claim 1.

13. The lens barrel according to claim 1 or 2; a camera body to which the lens barrel is attached; An imaging device comprising:

Images