Lens barrel

Abstract

The invention provides a lens barrel. The lens barrel includes: a plurality of aperture blades; a driving unit for driving the plurality of aperture blades; a first opening member that holds the drive unit; a second opening member including a plurality of opposing portions opposing the first opening member in an optical axis direction; and a plurality of buffer members respectively disposed between the first opening member and the plurality of opposing portions, the first opening member being fixed to the second opening member via the plurality of buffer members.

Description

[0001] This application is a divisional application of the invention patent application with an international filing date of September 13, 2021, international application number PCT / JP2021 / 033505, national application number 202180065923.3, and invention title "Lens Barrel and Imaging Device". Technical Field

[0002] This invention relates to a lens barrel and a shooting device. Background Technology

[0003] An aperture device is provided in the lens barrel (for example, see Patent Document 1). The lens barrel is required to be quiet.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 4-128727 Summary of the Invention

[0007] According to the first method, the lens barrel includes: a plurality of aperture blades; a drive unit for driving the plurality of aperture blades; a first opening member for holding the drive unit; a second opening member including a plurality of opposing portions opposite to the first opening member in the optical axis direction; and a plurality of buffer members respectively disposed between the first opening member and the plurality of opposing portions, wherein the plurality of buffer members perform positioning of the first opening member relative to the second opening member.

[0008] According to the second method, the shooting device includes the aforementioned lens barrel and shooting element.

[0009] Furthermore, the structure of the embodiments described later can be appropriately modified, and at least some components can be replaced with other components. Moreover, the components whose arrangement is not particularly limited are not limited to the arrangement disclosed in the embodiments, and can be arranged in positions that enable their functions. Attached Figure Description

[0010] Figure 1 This is a diagram showing a camera having a lens barrel and a camera body according to one embodiment.

[0011] Figure 2 This is a perspective view showing the state in which the aperture device according to one embodiment is mounted on the fixed cylinder.

[0012] Figure 3 yes Figure 2 An exploded 3D diagram.

[0013] Figure 4 It is Figure 1An enlarged sectional view of the portion enclosed by dashed lines.

[0014] Figure 5 (A) is a diagram showing the fixed cylinder as viewed from the subject side. Figure 5 (B) is a three-dimensional view of the fixed cylinder.

[0015] Figure 6 (A) is a diagram showing the aperture mechanism as viewed from the camera body side. Figure 6 (B) is a three-dimensional view of the aperture device.

[0016] Figure 7 (A) is a top view showing the relationship between the aperture device and the buffer component. Figure 7 (B) is a three-dimensional diagram showing the relationship between the aperture device and the buffer component. Detailed Implementation

[0017] Hereinafter, with reference to the accompanying drawings, a lens barrel according to one embodiment will be described. Furthermore, in the following figures, an orthogonal XYZ coordinate system is appropriately set up for ease of explanation and understanding. In this coordinate system, the camera position (hereinafter referred to as the positive position) when the photographer takes a picture of a horizontally elongated image with the optical axis OA horizontal is defined as the +X direction from the subject towards the camera body 10. Additionally, the direction to the right of the positive position is defined as the +Y direction. Furthermore, the direction upwards of the positive position is defined as the +Z direction. In addition, the shapes, lengths, thicknesses, and other scales of the various parts shown in the embodiment may not be consistent with the actual object; furthermore, parts that do not need to be described are appropriately omitted or simplified in their depiction.

[0018] Figure 1 This is a schematic diagram of a camera 1 equipped with the lens barrel 20 according to this embodiment. The camera 1 includes a camera body 10 and a lens barrel 20 that can be attached to and detached from the camera body 10. Furthermore, the lens barrel 20 and the camera body 10 may also be integrated.

[0019] The lens barrel 20 includes: a lens 21 as an optical component, which refracts incident subject light to form an image of the subject on the exit side; and an aperture device 30, which adjusts the opening size of the lens 21. The aperture device 30 is mounted to the fixed barrel 22 via a buffer member 40 and a screw 41. Figure 1 In the image, lens 21 is depicted as a single lens, but it can also be composed of multiple lenses. Additionally, in... Figure 1 The image depicts only one lens group, but multiple lens groups can also be provided. These multiple lens groups can be positioned relative to the aperture device 30 on the side of the camera body 10, or they can be positioned relative to both the subject side and the camera body 10 side.

[0020] The camera body 10 has an imaging element 12 that captures an image of a subject formed by the lens 21 and converts it into an electrical signal.

[0021] Next, the structure of the aperture device 30 in this embodiment will be described. Figure 2 This is a perspective view showing the aperture device 30 according to one embodiment mounted on the fixing cylinder 22. Figure 3 yes Figure 2 An exploded 3D diagram.

[0022] like Figure 2 As shown, in this embodiment, the aperture device 30 is disposed inside the fixed cylinder 22, and the aperture device 30 and the fixed cylinder 22 do not contact each other radially. That is, a clearance (gap) is provided around the entire circumference between the inner wall of the fixed cylinder 22 and the outer peripheral surface of the aperture device 30 (more specifically, the opening member 31 described later). In addition, there is also a gap between the aperture device 30 and the fixed cylinder 22 in the optical axis OA direction, and they do not contact each other.

[0023] like Figure 3 As shown, the aperture device 30 is an iridescent aperture device, comprising an opening member 31, a rotating member 32, and multiple aperture blades 33 (in... Figure 3 The diagram shows only one piece), cam plate 34 and stepper motor 35.

[0024] The opening member 31 is an annular member, comprising a main body 313 and a first protrusion 312a, a second protrusion 312b, and a third protrusion 312c protruding from the main body 313 in a direction intersecting the optical axis OA. The main body 313 has a centrally located fitting opening 311. Additionally, a stepper motor 35 is mounted on the +X side of the main body 313. Details regarding the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c will be described later.

[0025] The rotating member 32 is an annular member with an annular protrusion 321 in the center that engages with the fitting opening 311 of the opening member 31. A sector gear 322 is formed on the outer edge of the rotating member 32, which meshes with a pinion (not shown) mounted on the rotating shaft of the stepper motor 35.

[0026] A support portion 331 is provided on the +X side of the multiple aperture blades 33, and a cam follower 332 is provided on the -X side. The support portion 331 is inserted into a hole (not shown) provided on the -X side of the rotating member 32, and the cam follower 332 is inserted into a cam 341 provided on the cam plate 34.

[0027] When the F-value is changed, the stepper motor 35 is driven to rotate, and the rotating member 32 with a sector gear 322 rotates. This sector gear 322 meshes with a pinion mounted on the rotating shaft of the stepper motor 35. Since the support portion 331 of the aperture blade 33 is inserted into the hole formed on the -X side of the rotating member 32, if the rotating member 32 rotates around the optical axis, the aperture blade 33 also rotates around the optical axis. Since the cam follower 332 of the aperture blade 33 is inserted into the cam 341 of the cam plate 34, the cam follower 332 of the aperture blade 33 rotates along the cam 341 with the support portion 331 as the fulcrum. In addition, when the focal length is changed, the cam plate 34 rotates via a mechanical mechanism (not shown), and the cam follower 332 of the aperture blade 33 rotates along the cam 341 with the support portion 331 as the fulcrum. Thus, the opening 37 of the iris diaphragm can be adjusted by multiple aperture blades 33 (see reference). Figure 1 The size of ).

[0028] The aperture device 30 thus configured is mounted on the fixed cylinder 22 using the first protrusion 312a, the second protrusion 312b and the third protrusion 312c of the opening member 31.

[0029] Figure 4 It will be Figure 1 An enlarged sectional view of the portion enclosed by dashed lines. (Example) Figure 4 As shown, the fixing cylinder 22 has a first opposing portion 223a, a second opposing portion 223b, and a third opposing portion 223c at positions opposite to the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c respectively in the optical axis OA direction. Furthermore, in the following description, unless otherwise specified, the first opposing portion 223a, the second opposing portion 223b, and the third opposing portion 223c will be referred to as opposing portion 223.

[0030] The aperture device 30 is mounted on the fixed cylinder 22 by means of screws 41, etc., between the first protrusion 312a, the second protrusion 312b and the third protrusion 312c of the opening member 31 and the multiple opposing parts 223 of the fixed cylinder 22.

[0031] To achieve quiet operation of the lens barrel 20, it is preferable to minimize the transmission of vibrations generated by the driving of the aperture blades 33 to the fixed barrel 22. Therefore, for example, it is considered to make the buffer member 40 as rubber. However, when the buffer member 40 is made of rubber, it is prone to deformation, so the position of the aperture device 30 relative to the fixed barrel 22 is uncertain in both the optical axis OA direction (X direction) and in the plane directions orthogonal to the optical axis (Y, Z directions). That is, the buffer member 40 cannot be used for positioning the aperture device 30. Therefore, a structure is needed to position the aperture device 30 relative to the fixed barrel 22 at a predetermined position. For example, for positioning in the X direction, abutment contact surfaces are provided on the opening member 31 and the fixed barrel 22, and the abutment contact surfaces are positioned against each other. Furthermore, for positioning in the Y and Z directions, a positioning boss (protrusion) is provided on the opening member 31 of the aperture device 30, and a hole is provided on the fixed barrel 22 for inserting the boss, and positioning is achieved by fitting the boss into the hole. However, in this case, since the aperture device 30 is in contact with the fixed barrel 22, the vibration generated by the driving of the aperture blades 33 is directly transmitted from the aperture device 30 to the fixed barrel 22, which may result in insufficient noise reduction of the lens barrel 20.

[0032] Therefore, in this embodiment, the buffer member 40 is made of engineering plastic or super engineering plastic.

[0033] Here, engineering plastics refer to plastics with heat resistance of 100°C or higher, tensile strength of 49.0 MPa or higher, and flexural modulus of elasticity of 2.4 GPa or higher. Examples of engineering plastics include polyacetal (POM), polycarbonate (PC), modified polyphenylene ether (m-PPE), polyamide (PA), and polybutylene terephthalate (PBT).

[0034] In addition, so-called super engineering plastics refer to plastics that meet the conditions of engineering plastics and have a heat resistance of 150°C or higher. Examples of super engineering plastics include polyphthalamide (PPA), polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polyamide imide (PAI), polyetheretherketone (PEEK), and polytetrafluoroethylene (PTFE).

[0035] The buffer member 40, made of engineering plastic or super engineering plastic, is not easily deformed. That is, the external dimensions (thickness in the optical axis OA direction and size in the direction orthogonal to the optical axis) of the buffer member 40 before lens barrel 20 assembly are approximately the same as those after lens barrel 20 assembly (after aperture device 30 is fixed to fixing cylinder 22). Furthermore, after aperture device 30 is fixed to fixing cylinder 22, the buffer member 40 is not easily deformed by impact or vibration. Therefore, by clamping the buffer member 40 according to this embodiment between aperture device 30 and fixing cylinder 22, the position of aperture device 30 relative to fixing cylinder 22 in the optical axis OA direction can be positioned at a predetermined position (design position). That is, the buffer member 40 functions as a positioning member of aperture device 30 relative to fixing cylinder 22 in the optical axis OA direction. Moreover, the buffer member 40 also functions as a spacer that prevents fixing cylinder 22 from contacting aperture device 30 in the optical axis OA direction.

[0036] Next, the positioning of the aperture device 30 on a plane perpendicular to the optical axis OA of the lens barrel 20 will be explained.

[0037] Figure 5 (A) is a diagram of the fixed tube 22 viewed from the subject side. Figure 5 (B) is a three-dimensional view of the fixed cylinder 22. Figure 6 (A) is a diagram showing the aperture device 30 as viewed from the side of the camera body 10. Figure 6 (B) is a perspective view of the aperture device 30. Additionally, Figure 7 (A) is a top view showing the relationship between the aperture device 30 and the buffer member 40. Figure 7 (B) is a perspective view showing the relationship between the aperture device 30 and the buffer member 40.

[0038] like Figure 5 (A) and Figure 5 As shown in (B), on the fixed cylinder 22, on the first opposing portion 223a, the second opposing portion 223b, and the third opposing portion 223c, which are respectively opposite to the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c in the optical axis OA direction, fitting portions 224 for fitting the buffer member 40 are formed. The fitting portion 224 has a wall portion 225 that extends along the optical axis OA direction and fits into at least a portion of the outer periphery of the buffer member 40. In addition, the fitting portion 224 has a contact surface 226 that abuts against the buffer member 40 in the optical axis OA direction. The position of the buffer member 40 relative to the fixed cylinder 22 is fixed in a plane perpendicular to the optical axis OA by means of the wall portion 225. In addition, the position of the buffer member 40 relative to the fixed cylinder 22 is fixed in the optical axis OA direction by means of the contact surface 226.

[0039] On the other hand, on the aperture device 30, such as Figure 6 (A) and Figure 6 As shown in (B), a fitting portion 315 that engages with the buffer member 40 is formed in the first protrusion 312a of the opening member 31. Figure 7 (A) and Figure 7 As shown in (B), the fitting portion 315 has a wall portion 316a that extends along the optical axis OA and fits into at least a portion of the outer periphery of the buffer member 40. Additionally, the fitting portion 315 has a contact surface 317a that abuts against the buffer member 40 in the optical axis OA direction. The wall portion 316a fixes the position of the buffer member 40 relative to the opening member 31 in a plane perpendicular to the optical axis OA, and the contact surface 317a fixes the position of the buffer member 40 relative to the opening member 31 in the optical axis OA direction.

[0040] Therefore, if the buffer member 40 is arranged in the fitting part 315 of the first protrusion 312a and the fitting part 224 of the first opposing part 223a of the fixed cylinder 22, the position of the aperture device 30 on the plane perpendicular to the optical axis OA relative to the fixed cylinder 22 can be positioned at a predetermined position (design position) in a direction other than the direction in which the opening member 31 rotates with the first protrusion 312a as the fulcrum.

[0041] like Figure 7 (A) and Figure 7 As shown in (B), a wall portion 316b is formed in the second protrusion 312b. This wall portion 316b extends along the optical axis OA and contacts the outer periphery of the buffer member 40 in the circumferential direction of a circle centered on the optical axis OA. Additionally, as... Figure 6 (A) and Figure 6 As shown in (B), a contact surface 317b is formed that abuts against the buffer member 40 in the optical axis OA direction. The position of the buffer member 40 relative to the opening member 31 in the circumferential direction of the circle centered on the optical axis OA is fixed by the wall portion 316b, and the position of the buffer member 40 relative to the opening member 31 in the optical axis OA direction is fixed by the contact surface 317b.

[0042] If the buffer member 40 is positioned at the fitting portion 224 of the second protrusion 312b and the second opposing portion 223b of the fixed cylinder 22, the circumferential movement of the opening member 31 relative to the fixed cylinder 22 about the optical axis OA is restricted by the wall portion 316b. That is, in the direction in which the opening member 31 rotates about the first protrusion 312a as a fulcrum, the movement of the opening member 31 is restricted by the wall portion 316b and the buffer member 40. In this way, the aperture device 30 can be positioned on a plane perpendicular to the optical axis OA by means of the buffer member 40, the wall portion 316a, and the wall portion 316b.

[0043] On the other hand, no wall portions 316a and 316b are formed on the third protrusion 312c to contact the outer periphery of the buffer member 40. That is, the third protrusion 312c does not have a wall portion extending along the optical axis OA. This is to avoid excessive constraint on the aperture device 30. Furthermore, as... Figure 6 (A) and Figure 6 As shown in (B), a contact surface 317c is formed in the third protrusion 312c that abuts against the buffer member 40 in the optical axis OA direction. If the buffer member 40 is disposed in the fitting portion 224 of the third protrusion 312c and the third opposing portion 223c of the fixing cylinder 22, the position of the opening member 31 relative to the fixing cylinder 22 in the optical axis OA direction is fixed by the contact surface 317c.

[0044] By configuring the first protrusion 312, the second protrusion 312b, and the third protrusion 312c in this way, even without providing a positioning boss (protrusion) or a hole for inserting the boss, the aperture device 30 on a plane perpendicular to the optical axis OA can be positioned relative to the fixed cylinder 22 using the buffer member 40.

[0045] Thus, in this embodiment, since the buffer member 40, whose external dimensions are not easily changed, can position the aperture device 30 in the optical axis OA direction and on the plane perpendicular to the optical axis OA at a predetermined position, it is not necessary to provide additional positioning structures (abutment contact surfaces, bosses) on the aperture device 30 and the fixing cylinder 22. Because no positioning structures (abutment contact surfaces, bosses) are provided, the aperture device 30 does not contact the fixing cylinder 22.

[0046] As described above, a gap is provided along the entire circumference between the inner wall of the fixed cylinder 22 and the outer peripheral surface of the aperture device 30 (aperture member 31). Furthermore, since no positioning structure is provided due to the structure of the buffer member 40, the first protrusion 312a, the second protrusion 312b, the third protrusion 312c, the fitting portion 224, etc., the fixed cylinder 22 does not contact the aperture device 30 in the optical axis OA direction and in the plane direction perpendicular to the optical axis OA. Therefore, the aperture device 30 (aperture member 31) does not contact the fixed cylinder 22. Consequently, vibrations generated by the driving of the aperture blades 33 are not directly transmitted from the aperture device 30 to the fixed cylinder 22, thus achieving quiet operation of the lens barrel 20.

[0047] Furthermore, in this embodiment, the material of the buffer member 40 is a material among the aforementioned engineering plastics and super engineering plastics with a vibration transmission rate lower than that of the fixed barrel 22. As a result, the buffer member 40 absorbs the vibrations generated by the driving of the aperture blades 33 and can suppress the transmission of vibrations to the fixed barrel 22, thus achieving further noise reduction of the lens barrel 20.

[0048] Moreover, in this embodiment, such as Figure 6 (A) ~ Figure 7 As shown in (B), the main body 313 of the opening member 31 has a circumferentially extending slit 314 at a position radially opposite to the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c. Thus, for example, the portions between the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c and the slit 314 function like a leaf spring to absorb vibrations, thereby further suppressing vibration transmission to the fixing cylinder 22 and achieving further noise reduction of the lens barrel 20.

[0049] As detailed above, according to this embodiment, the lens barrel 20 includes: a plurality of aperture blades 33; a stepper motor 35 for driving the plurality of aperture blades 33; an aperture member 31 for holding the stepper motor 35; a fixed barrel 22 including a plurality of opposing portions 223 opposite to the aperture member 31 in the optical axis OA direction; and a plurality of buffer members 40 respectively disposed between the aperture member 31 and the plurality of opposing portions 223, wherein the buffer members 40 position the aperture member 31 relative to the fixed barrel 22. The buffer members 40 enable the aperture member 31 to be positioned relative to the fixed barrel 22 without direct contact between the aperture member 31 and the fixed barrel 22, thereby suppressing the transmission of vibrations generated during the driving of the aperture blades 33 to the fixed barrel 22, and thus enabling the lens barrel 20 to operate quietly. Furthermore, the motor used to drive the aperture blades is not limited to a stepper motor, but may also be a DC motor or an ultrasonic motor, etc.

[0050] Furthermore, in this embodiment, the opening member 31 does not contact the fixed cylinder 22. As a result, the vibration generated by the driving of the aperture blades 33 is not directly transmitted to the fixed cylinder 22, thus making the lens barrel 20 quieter.

[0051] Furthermore, in this embodiment, the external dimensions of each of the plurality of buffer members 40 before and after the lens barrel 20 is assembled are approximately the same. Since the external dimensions of the buffer members 40 are approximately the same before and after the lens barrel 20 is assembled, the buffer members 40 can be used for positioning the aperture device 30.

[0052] Furthermore, in this embodiment, the plurality of buffer members 40 are members with a lower vibration transmission rate than the members of the fixed barrel 22. As a result, the buffer members 40 absorb the vibrations generated by the driving of the aperture blades 33 and can suppress the transmission of vibrations to the fixed barrel 22, thus achieving further noise reduction of the lens barrel 20.

[0053] Furthermore, in this embodiment, the opening member 31 has a fitting portion 315 that fits into the buffer member 40 at a position opposite to the first opposing portion 223a among the plurality of opposing portions 223 in the optical axis OA direction. As a result, during the assembly of the lens barrel 20, the aperture device 30 can be positioned on a plane perpendicular to the optical axis OA in a direction other than the direction in which the opening member 31 rotates about the buffer member 40 that fits into the fitting portion 315.

[0054] Furthermore, in this embodiment, the fitting portion 315 includes a wall portion 316a that extends along the optical axis and fits into at least a portion of the buffer member 40. As a result, movement of the opening member 31 relative to the fixed cylinder 22 can be suppressed in the circumferential and radial directions of the circle centered on the optical axis OA.

[0055] Furthermore, in this embodiment, the opening member 31 has a wall portion 316b that contacts at least a portion of the buffer member 40 at a position opposite to the second opposing portion 223b of the plurality of opposing portions 223 in the optical axis OA direction. Thus, in the direction in which the opening member 31 rotates about the buffer member 40 fitted into the fitting portion 315, the movement of the opening member 31 is restricted by the wall portion 316b and the buffer member 40, thereby enabling the positioning of the aperture device 30 on a plane perpendicular to the optical axis OA.

[0056] Furthermore, in this embodiment, the wall portion 316b extends along the optical axis OA and contacts the buffer member 40 in the circumferential direction of a circle centered on the optical axis OA. Thus, in the direction in which the opening member 31 rotates about the first protrusion 312a as a fulcrum, the movement of the opening member 31 can be restricted by the wall portion 316b and the buffer member 40.

[0057] Furthermore, in this embodiment, the opening member 31 does not have a wall portion extending along the optical axis OA at the position opposite to the third opposing portion 223c among the plurality of opposing portions. This allows for the suppression of excessive constraint on the aperture device 30.

[0058] Furthermore, in this embodiment, multiple opposing portions 223 are fitted into the buffer member 40. Therefore, the position of the buffer member 40 relative to the fixing cylinder 22 can be fixed in a plane perpendicular to the optical axis OA and in the direction of the optical axis OA.

[0059] Furthermore, in this embodiment, the opening member 31 has a main body portion 313 and a first protrusion 312a, a second protrusion 312b, and a third protrusion 312c that protrude from the main body portion 313 in a direction intersecting the optical axis OA and are opposite to a plurality of opposing portions 223. The main body portion 313 has a circumferentially extending slit 314 at a position radially opposite to the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c. As a result, the transmission of vibration from the main body portion 313 to the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c can be suppressed, thereby further suppressing the transmission of vibration to the fixing cylinder 22 and further reducing the noise of the lens barrel 20.

[0060] Furthermore, in this embodiment, the plurality of buffer members 40 are made of engineering plastic or super engineering plastic. Therefore, the aperture device 30 can be positioned using the buffer members 40, and the transmission of vibrations generated by the aperture device 30 to the fixed cylinder 22 can be suppressed.

[0061] In addition, as long as the external dimensions of the multiple buffer components 40 before the lens barrel 20 is assembled are roughly the same as the external dimensions after the lens barrel 20 is assembled, and the vibration transmission rate is lower than that of the fixed barrel 22, they can be made of metal.

[0062] Furthermore, in the above embodiment, the buffer member 40 is an annular cylindrical member, but it is not limited to this. The buffer member 40 may also be a cuboid, for example. In this case, the wall portion 316a of the fitting portion 315 of the opening member 31 and the wall portion 225 of the fitting portion 224 of the fixing cylinder 22 only need to contact at least a portion of the surfaces of the buffer member 40 other than the surfaces that contact the opening member 31 and the fixing cylinder 22 in the optical axis OA direction.

[0063] Furthermore, in the above embodiment, the structure of the first protrusion 312a to the third protrusion 312c of the opening member 31 may be opposite to the structure of the first opposing portion 223a to the third opposing portion 223c of the fixed cylinder 22. Specifically, a fitting portion that engages with the buffer member 40 may be provided on the first opposing portion 223a of the fixed cylinder 22, a wall portion that contacts the outer periphery of the buffer member 40 in the circumferential direction of the circle centered on the optical axis OA may be provided on the second opposing portion 223b, and no wall portion that contacts the buffer member 40 may be provided on the third opposing portion 223c. In this case, it is sufficient to form fitting portions that engage with the buffer member 40 on the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c of the opening member 31.

[0064] Furthermore, in the above embodiment, an example of providing three buffer members 40 was described, but two buffer members 40 may be provided instead of the third protrusion 312c of the opening member 31. Alternatively, multiple of one of the first protrusion 312a, the second protrusion 312b, and the third protrusion 312c may be provided, or more than four buffer members 40 may be provided.

[0065] Furthermore, in the above embodiment, an example of mounting the aperture device 30 on the fixed cylinder 22 was described, but the fixed cylinder 22 may also be a cylinder that does not move in the optical axis OA direction, or it may be a cylinder that moves in the optical axis OA direction. Additionally, the fixed cylinder 22 may also be a lens holding frame that holds the lens.

[0066] The above-described embodiments are preferred embodiments. However, they are not limited thereto, and various modifications can be implemented without departing from the spirit of the subject, and any combination of constituent elements can be used.

[0067] Label Explanation

[0068] 1 camera

[0069] 12 imaging elements

[0070] 20mm lens barrel

[0071] 22 Fixed Cylinder

[0072] 31 Opening Members

[0073] 33 aperture blades

[0074] 40 buffer components

[0075] 223 Relative Part

[0076] 224 Chimera Department

[0077] 225 wall section

[0078] 226 contact surface

[0079] 223a First Relative Part

[0080] 223b Second Relative Part

[0081] 223c Third Relative Part

[0082] 312a First protrusion

[0083] 312b second protrusion

[0084] 312c third protrusion

[0085] 313 Main Body

[0086] 315 Chimera Department

[0087] 314 slit

[0088] 316a and 316b wall sections

[0089] 317a and 317b contact surfaces

Claims

1. A lens barrel, comprising: Multiple aperture blades; The drive unit is used to drive the plurality of aperture blades; The first opening member holds the driving part; The second opening member includes a plurality of opposing portions, which are opposite to the first opening member in the optical axis direction; and Multiple buffer members are respectively disposed between the first opening member and the multiple opposing portions. The first opening member is fixed to the second opening member via the plurality of buffer members.

Images