Fitting mount and fitting device

Abstract

Provided are an accessory mount and an accessory device. The accessory mount is attachable to and detachable from a camera mount including a first mounting surface and a first claw portion, and the accessory mount includes: a first member including a second mounting surface facing the first mounting surface in an attached state in which the accessory mount is attached to the camera mount; and a second member including a second claw portion configured to overlap the first claw portion when viewed in a central axis direction in the attached state. A material of the first member and a material of the second member are different from each other.

Description

Technical Field

[0001] This disclosure relates to accessory mounts that can be attached to and detached from camera mounts, and accessory devices, such as lens devices, having such accessory mounts. Background Technology

[0002] Japanese Patent Application Publications (JP2012-78783 and 2010-66580) disclose accessory devices including accessory mounting parts that can be attached to and detached from camera mounts. These accessory devices are attached to video equipment via a snap-fit ​​connection between the accessory mounting part and the camera mount. Summary of the Invention

[0003] According to one aspect of this disclosure, an accessory mount can be attached to and detached from a camera mount, the camera mount including a first mounting surface and a first claw. The accessory mount may include: a first member including a second mounting surface, wherein, in an attached state, the second mounting surface faces the first mounting surface; and a second member including a second claw configured to overlap with the first claw when viewed in a central axis direction in the attached state. The materials of the first member and the second member may be different from each other.

[0004] According to another aspect of this disclosure, an accessory mount can be attached to and detached from a camera mount, the camera mount including a first mounting surface and a first claw. The accessory mount may include: a first member including a second mounting surface configured to contact the first mounting surface when the accessory mount is attached to the camera mount; a second member including a second claw configured to overlap with the first claw when viewed in a central axis direction when the accessory mount is attached to the camera mount; and a force-applying member configured to apply force to the second member relative to the first member in the central axis direction. Accessory devices having the above-described accessory mount also constitute another aspect of this disclosure. Camera mounts capable of being attached to the above-described accessory mount and imaging devices having the above-described camera mount also constitute another aspect of this disclosure.

[0005] The features of this disclosure will become apparent from the following description of embodiments with reference to the accompanying drawings. The following description of the embodiments will be given by way of example. Attached Figure Description

[0006] Figure 1A , Figure 1B and Figure 1CThese are front views and cross-sectional views of the lens mount according to the first embodiment.

[0007] Figure 2 It is a block diagram of a camera system including an interchangeable lens having a lens mount according to the first embodiment and a camera body.

[0008] Figure 3 This is an exploded perspective view of the lens mounting component according to the first embodiment.

[0009] Figure 4 This is a cross-sectional view of the lens mount according to the second embodiment.

[0010] Figure 5 This is a cross-sectional view of the lens mount according to the third embodiment. Detailed Implementation

[0011] Embodiments according to this disclosure will now be described with reference to the accompanying drawings. First Embodiment

[0012] Figure 2 The diagram illustrates a configuration of a camera system including a lens device 100 (optical device or interchangeable lens) as an accessory and a camera 200 as a recording device. The lens device 100 is attachable to and detachable from the camera 200. More specifically, the lens device 100 includes a lens mount (accessory mount) 101, and the lens device 100 is attachable to and detachable from the camera 200 by engaging the lens mount 101 with the camera mount 201 disposed on the camera 200.

[0013] Camera 200 includes an image sensor 202 and a camera CPU 220. The image sensor 202 includes a photoelectric conversion element such as a CCD sensor or a CMOS sensor, and converts the optical image (subject image) formed by the imaging optical system in lens device 100 (described below) into an imaging signal as an electrical signal. When the release switch 221 provided on camera 200 is turned on by the user, camera CPU 220 causes image sensor 202 to capture an image and generates image data based on the imaging signal output from image sensor 202. Camera CPU 220 also displays the generated image data on a display unit 222 provided, for example, on the back of camera 200, or records the image data on a recording medium (not shown), such as a semiconductor memory.

[0014] The camera CPU 220 can communicate with the lens CPU 120 in the lens device 100 via the camera terminal unit 225 disposed on the camera 200 and the lens terminal unit 125 disposed on the lens device 100. The camera CPU 220 uses the imaging signal or image data to perform metering (light measurement) and focus detection, calculates the exposure time of the image sensor 202 and the aperture value (F-number) of the imaging optical system based on the metering results (light measurement results), and calculates the focusing drive amount of the imaging optical system based on the focus detection results. The camera CPU 220 sends an aperture drive command including the aperture value and a focusing drive command including the focusing drive amount to the lens CPU 120.

[0015] A power source 226, such as a secondary battery, is provided in the camera 200, and the image sensor 202 and camera CPU 220 operate using the power supplied from the power source 226. A portion of the power from the power source 226 is also supplied to the lens device 100 and used for the operation of the lens CPU 120 and the imaging optical system.

[0016] The lens device 100 includes an optical system (camera optical system) and a retaining member (tube) 104 for holding (accommodating) the optical system. The camera optical system includes: a zoom lens ZL, which moves in the direction of the optical axis extending from the optical axis O for zooming; a focusing lens FL, which moves in the direction of the optical axis for focusing; a shift lens SL, which moves in a direction orthogonal to the optical axis O for image stabilization; and other lenses. The camera optical system also includes an aperture (stop) unit DU for adjusting the amount of light.

[0017] The lens device 100 also includes a zoom drive unit 121 for driving the zoom lens ZL, a focus drive unit 122 for driving the focusing lens FL, an aperture drive unit 123 for driving the aperture unit DU, and a shift drive unit 124 for driving the shift lens SL. As described above, according to the aperture drive command and focus drive command sent from the camera CPU 220, the lens CPU 120 causes the aperture drive unit 123 to drive the aperture unit DU and the focus drive unit 122 to drive the focusing lens FL.

[0018] The lens CPU 120 also causes the shift drive unit 124 to drive the shift lens SL based on camera shake, such as hand shake, detected by a shake sensor (not shown) provided on the lens device 100. When the zoom operation ring (not shown) provided on the lens device 100 is rotated by the user, the lens CPU 120 causes the zoom drive unit 121 to drive the zoom lens ZL.

[0019] Figure 3 It is shown Figure 2This is an exploded view of the mounting portion of the lens device 100 and camera 200. The camera mount 201 is fixed to the housing 205 of the camera 200 via a mounting force-applying member 207 and four screws 206. The mounting force-applying member 207 is a member that generates a force to pull the lens mount 101 toward the camera mount side. The camera terminal unit 225 is fixed to the housing 205 in a manner located inside the camera mount 201.

[0020] The housing 205 movably holds the locking pin 203, which serves as a protrusion, between a protruding position and a retracted position. In the protruding position, the locking pin 203 protrudes from the mounting surface (first mounting surface, hereinafter referred to as the camera mounting surface) 201a of the camera mount 201 toward the subject side (lens side), and in the retracted position, the locking pin 203 retracts more toward the image side. The locking pin 203 is spring-loaded toward the protruding position. The camera mount 201 includes three bayonet-type claws 201b spaced apart in the circumferential direction.

[0021] On the other hand, the lens mount 101 is fixed to the lens barrel 104, which serves as the housing of the lens device 100, by four screws 103. The lens mount 101 includes a mounting surface (an accessory mounting surface that serves as a second mounting surface, hereinafter referred to as the lens mounting surface) and three bayonet-type claws (accessory claws) spaced apart in the circumferential direction as engagement portions.

[0022] In the insertion phase, with the space between the three bayonet claws of the lens mount 101 and the three bayonet claws of the camera mount 201 aligned, the lens mount 101 is brought closer to the camera mount 201 in the optical axis direction. After the bayonet claws of the lens mount 101 pass through the space between the bayonet claws of the camera mount 201 and the lens mounting surface comes into contact with the camera mounting surface (facing the camera mounting surface), the lens mount 101 rotates about the optical axis from the insertion phase to the attachment phase. In the attachment phase (attached state), the bayonet claws of the lens mount 101 and the bayonet claws of the camera mount 201 overlap and engage with each other in the optical axis direction. Here, the bayonet claws of the camera mount 201 include a mounting force-applying member 207. That is, in the attachment phase, the bayonet claws of the camera mount 201, including the mounting force-applying member 207, engage with the bayonet claws of the lens mount 101.

[0023] Then, the mounting force-applying member 207 contacts the bayonet-type claw of the lens mount 101, thereby pulling the lens mount 101 toward the camera side. Thus, the lens mount surface is maintained in contact with the camera mount surface (facing the camera mount surface), and attachment is completed.

[0024] The lens terminal unit 125 is secured to the inner periphery of the lens mount 101 by a plurality of screws 106. In the attachment phase, the lens terminal unit 125 contacts the camera terminal unit 225, thereby enabling communication between the lens device 100 and the camera 200.

[0025] Reference Figure 1A , Figure 1B and Figure 1C The detailed configuration of the lens mount 101 according to the first embodiment is described. Figure 1A The lens mount 101 is shown in the attachment phase when viewed from the image side (camera side). Hereinafter, the bayonet-type claw provided on the lens mount 101 will be referred to as the lens claw (second claw), and the bayonet-type claw provided on the camera mount 201 will be referred to as the camera claw (first claw). The direction in which the central axis (coinciding with the optical axis O) of the lens mount 101 extends will be referred to as the central axis direction. Figure 1B It is along Figure 1A The cross-sectional view taken from line AA in the diagram. Figure 1C It is along Figure 1A The cross-sectional view taken from line BB in the diagram.

[0026] like Figure 1A As shown, the lens mount 101 includes an annular lens mounting surface 112, a radial engagement (or mating) portion 109, and lens claw portions 107a, 107b, and 107c provided at multiple locations (three locations in this embodiment) in the circumferential direction. The lens mounting surface 112 is a reference surface used to position the lens mount 101 (i.e., lens device 100) relative to the camera mount 201 (i.e., camera 200) in the central axis direction after the lens mounting surface 112 contacts the camera mounting surface provided on the camera mount 201 in the central axis direction.

[0027] A recessed locking hole portion 102 is formed at a circumferential location on the lens mounting surface 112. The locking hole portion 102 opens towards the image side in the lens mounting surface 112 and is formed as a bottomed concave shape with an inner diameter that engages, in the circumferential direction (rotation direction of the lens mount 101), with a locking pin 203 that has already entered the inner side of the locking hole portion 102 during the aforementioned attachment phase. The circumferential engagement of the locking pin 203 with the locking hole portion 102 prevents the lens mount 101 from rotating relative to the camera mount 201 from the attachment phase.

[0028] A circumferential groove 112a is formed between the inner and outer circumferential sides of the lens mounting surface 112.

[0029] The radial engagement portion 109 is the portion whose outer peripheral surface engages (radial fit) with the inner peripheral surface of the radial engagement portion provided on the camera mount 201 in the radial direction. The radial engagement portion 109 is provided in the circumferential region of the lens mount 101 where the lens claw portions 107a to 107c are not provided.

[0030] Three lens claws 107a, 107b, and 107c are bayoneted into camera claws located at three circumferential locations on the camera mount 201. The lens claws 107a, 107b, and 107c are formed to protrude radially from the inner side to the outer side in the lens mount 101, while the camera claws are formed to protrude radially from the outer side to the inner side in the camera mount 201.

[0031] like Figure 1B and Figure 1C As shown, the lens mount 101 is configured by combining the mounting surface member 111 as the first member and the mounting base (base portion) 110 as the second member. The mounting base 110 is fixed to... Figure 3 The components of the lens barrel 104 shown are integrated with the mounting base 110, and the lens claws 107a, 107b and 107c are integral with the mounting base 110. Alternatively, the lens claws 107a, 107b and 107c, which are manufactured as components separate from the mounting base 110, can be fixed to the mounting base 110 with screws or the like.

[0032] Mounting surface member 111 has a lens mounting surface 112 and a radial engagement portion 109. Mounting surface member 111 and mounting base 110 are each circumferentially continuous (uninterrupted) members.

[0033] Here, the mounting base 110 and the mounting surface member 111 are formed of different materials, and such materials are appropriately selected according to the length and weight of the lens device 100.

[0034] For example, in the case of a short and lightweight lens device 100, the material of the mounting surface member 111, which has the lens mounting surface 112 and the radial engagement portion 109, can be a metal such as an aluminum alloy or a copper alloy (e.g., brass) to prevent wear. In contrast, the lens claws 107a to 107c need to have strength (resistance to deformation) to withstand deformation caused by external forces such as impacts acting in the direction separating the lens device 100 from the camera 200. Therefore, the material of the mounting base 110, which has the lens claws 107a to 107c, can be a metal or resin with higher strength than the material of the mounting surface member 111. Using a high-strength resin can reduce the weight of the lens device 100. The material of the mounting base 110 can have lower strength than the material of the mounting surface member 111, provided that sufficient strength is ensured for the lens claws 107a, 107b, and 107c. When the mounting base 110 with lens claws 107a to 107c is made of a material with a lower coefficient of friction than the material of the mounting surface member 111, the operating force required to attach the lens device 100 to or remove the lens device 100 from the camera 200 can be reduced.

[0035] On the other hand, if the lens device 100 is long or heavy, the material of the mounting surface member 111 can be the same as the material used in the case where the lens device 100 is short and light. On the other hand, the material of the mounting base 110 can be a material such as stainless steel, titanium, or iron-based material, which has higher strength than the material of the mounting surface member 111 and the material of the mounting base 110 in the case where the lens device 100 is short and light.

[0036] Therefore, in this embodiment, appropriate materials can be selected for the mounting surface member 111 having the lens mounting surface 112 and the mounting base 110 having the lens claws 107a to 107c.

[0037] The lens mounting surface 112 and the mounting surface member 111 can be formed of different materials, and the lens claws 107a to 107c and the mounting base 110 can be formed of different materials. However, from the viewpoint of manufacturability, the lens mounting surface 112 and the mounting surface member 111 can be made of the same material, and the lens claws 107a to 107c and the mounting base 110 can be made of the same material.

[0038] Next, the arrangement (phase) of the lens claws 107a to 107c in the lens mount 101 will be described. For example... Figure 1A As shown, when viewed from the camera side in the direction of the central axis, the lens claw portion 107a is arranged on the opposite side of the locking hole portion 102 (the locking pin 203 in the attachment phase) via the central axis (optical axis O). In a clockwise direction starting from the lens claw portion 107a, the lens claw portions 107b and 107c are arranged sequentially.

[0039] In the following text, the space between lens claws 107c and 107a will be referred to as the first space 108a, the space between lens claws 107a and 107b will be referred to as the second space 108b, and the space between lens claws 107b and 107c will be referred to as the third space 108c. One end of lens claw 107a in the circumferential direction will be referred to as end 107a1 and 107a2, respectively; one end of lens claw 107b in the circumferential direction will be referred to as end 107b1 and 107b2, respectively; and one end of lens claw 107c in the circumferential direction will be referred to as end 107c1 and 107c2, respectively. These end 107a1, 107a2, 107b1, 107b2, 107c1, and 107c2... Figure 1A Arranged sequentially in a clockwise direction.

[0040] Next, the arrangement of the lens claws 107a to 107c for more stably attaching the lens device 100 to the camera 200 will be described. For example... Figure 1A As shown, when viewing the lens mount 101 from the central axis direction, the line passing through the center of the locking hole 102 (locking pin 203) and the central axis (optical axis O) of the lens mount 101 is defined as reference line L1. A line orthogonal to reference line L1 and passing through the central axis is defined as L2. One side of the locking hole 102 is set using line L2 as a boundary. Figure 1A The left side of the lens claw (in the image) is defined as the locking side. In lens claw portions 107a to 107c, lens claw portions 107c and 107b, each having at least a portion arranged on the locking side, are defined as the first lens claw portion and the second lens claw portion, respectively. The lens claw portion is arranged on the opposite side of the locking side using line L2 as a boundary (with the central axis between the locking side and its opposite side). Figure 1A The lens claw 107a on the right side of the image is defined as the opposite side lens claw.

[0041] The angle formed by the reference line L1 and the line L3 passing through the central axis and the end 107c1 of the first lens claw 107c closer to the locking hole 102 is defined as θ1. The angle formed by the reference line L1 and the line L4 passing through the central axis and the end 107b2 of the second lens claw 107b closer to the locking hole 102 is defined as θ2.

[0042] In this case, the lens mount 101 satisfies the following inequality (1) with respect to θ1 and θ2: 0.65 ≤ θ1 / θ2 ≤ 1.35 (1)

[0043] In this embodiment, θ1 = 54° and θ2 = 42°, therefore θ1 / θ2 = 1.29, which satisfies the condition of inequality (1). θ1 is greater than θ2. In this case, inequality (1) becomes as follows: 1.00 < θ1 / θ2 ≤ 1.35

[0044] θ1 and θ2 can be identical, in which case θ1 / θ2 becomes 1.00. That is, when θ1≥θ2, inequality (1) becomes as follows: 1.00 ≤ θ1 / θ2 ≤ 1.35

[0045] Inequality (1) can be replaced by the following inequality (1a): 0.70 ≤ θ1 / θ2 ≤ 1.30 (1a)

[0046] The lower limit of inequality (1a) can be 0.80 or 0.90. Inequality (1) can be replaced by the following inequality (1b): 0.60 ≤ θ1 / θ2 ≤ 1.40 (1b)

[0047] Similarly, for inequality (1b), in this embodiment where θ1 is greater than θ2 as described above, the following inequality is satisfied: 1.00 < θ1 / θ2 ≤ 1.40

[0048] like Figure 1A As shown, when the lens mount 101 (lens device 100) is in a first posture where the locking hole 102 is horizontal (left) about the central axis, θ2, which is the angle relative to the reference line L1 on the gravity direction side, is smaller than θ1 on the opposite side of the reference line L1 on the gravity direction side. In other words, when the lens mount 101 is in the first posture, the first lens claw 107c is located closer to the gravity direction than the second lens claw 107b. This relationship between θ1 and θ2 can prevent the front end of the lens device 100 from falling in the gravity direction in the first posture.

[0049] That is, in the lens mount 101, the first lens claw 107c and the second lens claw 107b are arranged at substantially equidistant positions (phase) relative to the locking hole 102. In other words, the locking hole 102 is located substantially centrally between the first lens claw 107c and the second lens claw 107b. Due to this arrangement of the lens claws, the lens mount 101 can be attached to the camera mount 201 more stably.

[0050] Therefore, the locking hole 102 (locking pin 203), the first lens claw 107c, and the second lens claw 107b are arranged in a well-balanced manner. The locking hole 102 fixes the lens mount 101 relative to the camera mount 201 in the circumferential direction, while the first lens claw 107c and the second lens claw 107b fix the position of the lens mount 101 in the central axis direction. Therefore, even when external forces from various directions act on the lens device 100 or the posture of the lens device 100 changes, the attachment of the lens device 100 to the camera 200 can be maintained more stably.

[0051] In addition to the first lens claw 107c and the second lens claw 107b, the lens mount 101 also includes a lens claw 107a on the opposite side. For example... Figure 1A As shown, the reference line L1 overlaps with the opposite lens claw portion 107a. As described above, except that the locking hole portion 102 is located approximately at the center between the first lens claw portion 107c and the second lens claw portion 107b, the opposite lens claw portion 107a is also located at the aforementioned position. That is, the locking hole portion 102 and the three lens claw portions 107a to 107c are arranged substantially uniformly in the circumferential direction at approximately 90° intervals. Therefore, the attachment of the lens device 100 to the camera 200 can be maintained more stably.

[0052] like Figure 1A As shown, the angle formed by the reference line L1 and the line L5 passing through the central axis and the end 107a1 closer to the first lens claw 107c is defined as θ3. The angle formed by the reference line L1 and the line L6 passing through the central axis and the end 107a2 closer to the second lens claw 107b is defined as θ4. In this case, for θ3 and θ4, the lens mount 101 can satisfy the following inequality (2), or the lens mount 101 can satisfy inequality (2a): 0.60 ≤ θ3 / θ4 ≤ 0.90 (2) 0.60 ≤ θ3 / θ4 ≤ 0.80 (2a)

[0053] Satisfying these inequalities means that when Figure 1A When the opposite lens claw 107a is divided into upper and lower parts about the baseline L1, the lower part is slightly longer than the upper part. The upper limit of inequality (2a) can be 0.70.

[0054] In this embodiment, θ3 = 21° and θ4 = 32°, therefore, θ3 / θ4 = 0.66, which satisfies inequality (2). In this embodiment, θ4 is greater than θ3. When θ3 / θ4 becomes higher than the upper limit of inequality (2), the lower part of the opposite-side lens claw 107a below the reference line L1 becomes excessively long relative to the upper part above the reference line L1. Then, the length of the second space 108b in the circumferential direction decreases, and correspondingly, the insertion phase (from Figure 1A The length of the camera claw passing through the second space 108b in the attachment phase (shown as a phase rotated approximately 60° clockwise) is reduced. As a result, in the attachment phase obtained by rotating approximately 60° counterclockwise from the insertion phase, the area of ​​the camera claw that has passed through the second space 108b and the area of ​​the second lens claw 107b that overlap each other in the direction of the central axis becomes too small, and may therefore hinder stable attachment. When θ3 / θ4 is below the lower limit of inequality (2), the following effect may not be obtained due to the fact that the lower part of the opposite lens claw 107a is longer than the upper part of the reference line L1.

[0055] Figure 1A The lens mount 101 is shown in its normal position, which is the most common position of the camera 200 during recording (the image sensor faces horizontally and the long side of the image sensor is horizontal). In this case, Figure 1A The downward direction corresponds to the direction of gravity. In order to prevent the lens device 100 from falling towards the ground relative to the camera 200 due to its own weight in a normal posture, the lower part of the opposite lens claw 107a below the reference line L1 can be longer than the upper part above the reference line L1.

[0056] like Figure 1A As shown, both the first lens claw 107c and the second lens claw 107b overlap with line L2, which serves as the aforementioned boundary line. This configuration can suppress the tendency of the lens device 100 to change its posture in the direction of falling towards the ground.

[0057] The lens mount 101 can satisfy the following inequality (3): 90° < θ1+θ2 < 180° (3)

[0058] When the angle formed by lines L3 and L4 is defined as θ (=θ1+θ2), inequality (3) can be rewritten as the following inequality (3'): 90° < θ < 180° (3′)

[0059] Satisfying inequality (3) means that the angle between the first lens claw 107c and the second lens claw 107b in the circumferential direction is an obtuse angle. As mentioned above, in this embodiment, θ1=54° and θ2=42°, therefore, θ(=θ1+θ2)=96°, which satisfies inequality (3'). The upper limit of inequality (3') can be 120° or 100°.

[0060] An obtuse angle θ means that the first lens claw 107c and the second lens claw 107b are separated from each other to a certain extent in the circumferential direction. In this embodiment, the locking hole 102 is provided in the region corresponding to the third space 108c between the first lens claw 107c and the second lens claw 107b separated as described above, that is, in the region where a certain amount of play may occur in the central axis direction. Therefore, from the insertion phase to the attachment phase, the lens mount 101 receives the contact of the force-applied locking pin 203 in the region where a certain amount of play may occur. Therefore, wear on the portion of the lens mount surface 112 that is abutted and slid by the locking pin 203 can be suppressed. In this embodiment, since the circumferential length of the third space 108c is longer than the circumferential length of each of the first space 108a and the second space 108b, the aforementioned wear can be further suppressed.

[0061] In this embodiment, the following condition (4) is satisfied: 40° < θ1 < 70° and 40° < θ2 < 70° (4)

[0062] That is, the first lens claw 107c and the second lens claw 107b are arranged in a well-balanced manner relative to the locking hole 102. Therefore, as described above, the attachment of the lens device 100 to the camera 200 can be maintained more stably. The upper limits of θ1 and θ2 in inequality (4) can each be 60°.

[0063] In this embodiment, since the first lens claw portion 107c and the second lens claw portion 107b overlap with the line L2 which serves as the boundary line, the first lens claw portion 107c and the second lens claw portion 107b can be arranged in a well-balanced manner relative to the locking hole portion 102. Second Embodiment

[0064] Figure 4 A lens mount 401 according to a second embodiment is shown, and a lens mount with... Figure 1B The lens mounting component has the same cross-section. In the second embodiment, components common to those in the first embodiment are indicated by the same reference numerals as those in the first embodiment.

[0065] The lens mount 401 according to this embodiment is configured by combining a mounting base 411, a claw member 414 movably held by the mounting base 411 in the direction of the central axis, and a mounting surface member 111. Lens claw portions 107a to 107c are provided on the claw member 414. In this embodiment, the mounting surface member 111 corresponds to the first member, the claw member 414 corresponds to the second member, and the mounting base 411 corresponds to the third member.

[0066] A lens force-applying member 413, such as a leaf spring, is arranged between the claw member 414 and the mounting base 411. A force F generated by the lens force-applying member 413 applies force to the claw member 414 towards the lens side (to the left in the figure) with respect to the mounting base 411 and the mounting surface member 111. Due to the applied force F, the camera mount is pulled towards the lens side via the lens claw portions 107a to 107c. In other words, the mounting base 411 and the mounting surface member 111 are pressed towards the camera side.

[0067] As described in the first embodiment, when the lens mount 101 is attached to the camera mount 201, the lens mount 101 is pulled toward the camera side by the force generated by the mount force application member 207, thereby maintaining the contact (facing) between the lens mount surface 112 and the camera mount surface. However, when the lens device 100 is heavy, the contact between the lens mount surface 112 and the camera mount surface may not be maintained solely by the force generated by the mount force application member 207.

[0068] If the force applied by the mounting force-applying member 207 is simply increased, the force becomes excessive when attaching the lightweight lens device 100, making it difficult to attach and detach the lens device 100.

[0069] Therefore, in this embodiment, the mounting base 411 and the claw member 414 are separated from each other, and a lens force-applying member 413 is provided between the mounting base 411 and the claw member 414, so that a force F is added to the force generated by the mounting force-applying member 207 as a force to maintain the contact between the lens mounting surface 112 and the camera mounting surface. Therefore, even when the lens device 100 is heavy, the contact between the lens mounting surface 112 and the camera mounting surface can be maintained.

[0070] In this embodiment, the mounting surface member 111 and the claw member 414 may be formed of a different material than those in the first embodiment, or they may be formed of the same material. The material of the mounting base 411 may be different from or the same as the material of the mounting surface member 111 and the claw member 414. Third Embodiment

[0071] Figure 5A lens mount 501 according to a third embodiment is shown, and a lens mount with... Figure 1B The third embodiment has the same cross-section as the lens mount. The third embodiment is a variation of the first embodiment, and elements common to those in the first embodiment are indicated by the same reference numerals as those in the first embodiment.

[0072] According to this embodiment, the lens mount 501 is configured by combining a mounting base (first member) 510 having a lens mounting surface 112 and a claw member (second member) 511 having lens claws 107a to 107c.

[0073] In this embodiment, the mounting base 510 and the claw member 511 are formed of different materials. The material of the claw member 511 has a different strength than the material of the mounting base 510, or has a lower coefficient of friction than the material of the mounting base 510.

[0074] The lens mount configurations described in the first to third embodiments can also be applied to accessory mounts disposed on accessory devices other than lens devices that are attachable to and detachable from a camera. Examples of such accessory devices include adapters (intermediate adapters) or extenders for connecting a camera and a lens device, and covers for protecting the camera mount. The adapter may have the function of converting the communication method between the camera and the lens device, or may include optical elements such as lenses or filters. The accessory mount according to this embodiment can also be used as an accessory mount for an accessory device, wherein the accessory mount is removable.

[0075] While this disclosure has been described with reference to embodiments, it should be understood that this disclosure is not limited to the disclosed embodiments. The scope of the appended claims should be given the broadest interpretation to cover all such modifications and equivalent structures and functions.

[0076] Various embodiments may select appropriate materials for both the first and second components. Various embodiments may apply force to the second component relative to the first component.

Claims

1. An accessory mounting member that is attachable to and detachable from a camera mount, the camera mount including a first mounting surface and a first claw portion, the accessory mounting member comprising: The first component includes a second mounting surface, wherein the second mounting surface faces the first mounting surface when the accessory mount is attached to the camera mount. as well as The second component includes a second claw portion, which is configured to overlap with the first claw portion when viewed in the central axis direction in the attached state. The characteristic feature is that the materials of the first component and the second component are different from each other.

2. The accessory mounting component according to claim 1, characterized in that, When viewed in the central axis direction in the attached state, the second claw portion overlaps with the first claw portion, thereby maintaining the state in which the second mounting surface contacts the first mounting surface.

3. The accessory mounting component according to claim 1, characterized in that, The material of the second component has a strength different from that of the material of the first component.

4. The accessory mounting component according to claim 1, characterized in that, The material of the second component has a lower coefficient of friction than the material of the first component.

5. The accessory mounting component according to claim 1, characterized in that, The first component has a radial engagement portion configured to radially engage with the camera mount when the second mounting surface and the first mounting surface are in contact with each other.

6. The accessory mounting component according to claim 5, characterized in that, The radial engagement portion is located in the circumferential region of the accessory mounting part where the second claw portion is not located.

7. The accessory mounting component according to claim 1, characterized in that, The first component and the second component are each components that are continuous in the circumferential direction of the fitting mount.

8. The accessory mounting component according to any one of claims 1 to 7, further comprising a force-applying member configured to apply force to the second member relative to the first member in a direction for contacting the second mounting surface with the first mounting surface.

9. The accessory mounting component according to claim 8, characterized in that, The second component is movably held in the central axis direction by the third component constituting the accessory mounting member. The force-applying component is arranged between the second component and the third component.

10. An accessory mounting member that is attachable to and detachable from a camera mount, the camera mount including a first mounting surface and a first claw portion, the accessory mounting member comprising: A first component includes a second mounting surface configured to contact the first mounting surface when the accessory mount is attached to the camera mount. The second component includes a second claw portion, which is configured to overlap with the first claw portion when viewed in the central axis direction with the accessory mount attached to the camera mount. as well as A force-applying member is configured to apply a force to the second member relative to the first member in the direction of the central axis.

11. An accessory device, comprising: Accessory mounting component according to any one of claims 1 to 10; as well as Optical components.

12. An accessory device, comprising: The accessory mounting part according to any one of claims 1 to 10, The accessory device is characterized in that it can be attached to and detached from the lens device.

Images