Fitting mount and fitting device

Abstract

A mount member and an accessory device are provided. The mount member is attachable to and detachable from a camera mount member having a first mount surface and a protrusion. The mount member includes a first member having a second mount surface facing the first mount surface in a case where the mount member is attached to the camera mount member, and a second member configured to restrict movement in a circumferential direction with respect to the protrusion in a case where the mount member is attached to the camera mount member. The second member is arranged in a first opening provided in the second mount surface.

Description

Technical Field

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

[0002] Japanese Patent Application Publication No. 2012-78783 discloses an accessory device having an accessory mounting member that can be attached to and detached from a camera mount. The accessory device is attached to the camera mount by inserting the accessory mounting member into the camera mount in an insertion phase and then rotating the accessory mounting member. In the attached state, a locking pin (protrusion) protruding from the camera mount engages with a locking hole (recess) provided in the accessory mounting member, thereby restricting the rotation of the accessory mounting member. 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 having a first mounting surface and a protrusion. The accessory mount may include: a first member having a second mounting surface facing the first mounting surface when the accessory mount is attached to the camera mount; and a second member configured to restrict circumferential movement relative to the protrusion when the accessory mount is attached to the camera mount. The second member may be arranged in a first opening provided in the second mounting surface. Accessory devices having the above-described accessory mount also constitute another aspect of this disclosure. Camera mounts that can be attached to the above-described accessory mount and imaging devices having the above-described camera mount also constitute another aspect of this disclosure.

[0004] 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

[0005] Figure 1 This is a block diagram illustrating the configuration of a camera and a lens device having a lens mount according to an embodiment.

[0006] Figure 2 It is an exploded perspective view of the lens equipment and camera mounting parts.

[0007] Figure 3A and Figure 3B These are an overall view and a cross-sectional view of the lens mounting component according to an embodiment.

[0008] Figure 4A and Figure 4B These are an overall view and a cross-sectional view of the camera mount to which the lens mount is connected according to the embodiment.

[0009] Figure 5A and Figure 5B This is a diagram illustrating a connecting member disposed on a lens mount according to an embodiment.

[0010] Figure 6 This is a diagram illustrating the insertion phase of the lens mount relative to the camera mount according to an embodiment.

[0011] Figure 7 This is a diagram illustrating the attachment phase of the lens mount relative to the camera mount according to an embodiment.

[0012] Figure 8A and Figure 8B This is a block diagram illustrating the communication configuration of the lens device and the camera.

[0013] Figure 9A and Figure 9B This is a diagram illustrating the arrangement of terminals in a lens terminal unit according to an embodiment.

[0014] Figure 10A , Figure 10B and Figure 10C These are front views and partially enlarged views of a lens mount according to a modified embodiment. Detailed Implementation

[0015] Embodiments according to this disclosure will now be described with reference to the accompanying drawings.

[0016] Figure 1 An example of a camera system configuration is shown, comprising 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 detachably attached to the camera 200. More specifically, the lens device 100 includes a lens mount (accessory mount) 101, and the lens device 100 is attached to the camera 200 by connecting the lens mount 101 to a camera mount 201 disposed on the camera 200.

[0017] 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 the lens device 100 (described later) into an imaging signal as an electrical signal. When the release switch 221 provided on the camera 200 is turned on by the user, the camera CPU 220 causes the image sensor 202 to capture an image and generates image data based on the imaging signal output from the image sensor 202. The camera CPU 220 displays the generated image data on a display unit 222 provided on the back of the camera 200 or elsewhere, or records the image data on a recording medium (such as a semiconductor memory, not illustrated).

[0018] 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, 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.

[0019] The camera 200 includes a power source 226 such as a secondary battery, 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.

[0020] The lens device 100 includes an optical system (camera optical system) and a holding member (lens barrel) 104 for holding the optical system. The camera optical system includes: a zoom lens ZL, which moves along an optical axis extending from the optical axis O for zooming; a focusing lens FL, which moves along an optical axis for focusing; a shift lens SL, which moves in a direction orthogonal to the optical axis O for image stabilization; and lenses other than those described above. The camera optical system also includes an aperture unit DU for adjusting the amount of light.

[0021] 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.

[0022] The lens CPU 120 also causes the shift drive unit 124 to drive the shift lens SL based on camera shake (such as camera 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.

[0023] Figure 2 Example Figure 1 This is an exploded view of the mounting portion of the lens device 100 and camera 200. The camera mount 201 is secured to the housing 205 of the camera 200 via a mounting force-applying member 207 using four screws 206. The mounting force-applying member 207 is a member that generates a force for pulling the lens mount 101 toward the camera mount side. The camera terminal unit 225 is secured to the housing 205 in a manner located inside the camera mount 201.

[0024] The housing 205 holds the locking pin 203, which serves as a protrusion, movable between a protruding position and a retracted position. In the protruding position, the locking pin 203 protrudes from the mounting surface of the camera mount 201 (hereinafter referred to as the camera mount surface) toward the subject side (lens side), and in the retracted position, the locking pin 203 retracts toward the image side. The locking pin 203 is spring-loaded toward the protruding position. The camera mount 201 includes three bayonet portions arranged circumferentially spaced apart.

[0025] 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 has a mounting surface (accessory mounting surface; hereinafter referred to as the lens mount surface) and three bayonet portions (accessory claw portions) arranged circumferentially at intervals as connecting parts.

[0026] The lens mount 101 moves toward the camera mount 201 in the optical axis direction during the insertion phase, with the three bayonet portions of the lens mount 101 aligned with the three bayonet portions of the camera mount 201. When the bayonet portions of the lens mount 101 pass through the space between the bayonet portions of the camera mount 201 and the lens mount surface faces (contacts) the camera mount surface, the lens mount 101 rotates about the optical axis from the insertion phase to the attachment phase. In the attachment phase, the bayonet portions of the lens mount 101 and the camera mount 201 overlap each other in the optical axis direction, and the mounting force member 207 contacts the bayonet portions of the lens mount 101, thereby pulling the lens mount 101 toward the camera side. Furthermore, the locking pin 203 engages with the locking hole, described later, in the circumferential direction. Thus, the state of the lens mount surface facing (contacting) the camera mount surface is maintained, and attachment is completed.

[0027] The lens terminal unit 125 is secured to the inner periphery of the lens mount 101 using 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.

[0028] Reference Figure 3A and Figure 3BThe detailed configuration of the lens mount 101 according to the embodiment is described. Figure 3A An example is shown of a lens mount 101 in the attachment phase when viewed from the image side (camera side). Hereinafter, the bayonet portion provided on the lens mount 101 is referred to as a lens claw portion, and the bayonet portion provided on the camera mount 201 is referred to as a camera claw portion. The direction in which the central axis of the lens mount 101 (which coincides with the optical axis O) extends is referred to as the central axis direction. Figure 3B Examples along Figure 3A The cross-sectional view of lens mount 101 taken from line AA in the figure.

[0029] like Figure 3A As shown, the lens mount 101 includes an annular lens mount surface 111, a diameter fitting portion 109, and lens claw portions 107a, 107b, and 107c disposed at multiple positions (three positions in this embodiment) in the circumferential direction. The lens mount surface 111 is a reference surface for positioning the lens mount 101 (i.e., lens device 100) relative to the camera mount 201 (i.e., camera 200) in the central axis direction by contacting the camera mount surface disposed on the camera mount 201 in the central axis direction.

[0030] A locking hole 102, serving as a second opening, is formed at a circumferential position on the lens mount surface 111. The locking hole 102 opens towards the image side on the lens mount surface 111 and is formed as a bottomed concave shape with an inner diameter. This bottomed concave shape engages circumferentially (in the rotation direction of the lens mount 101) with a locking pin 203 that enters the locking hole 102 at the aforementioned attachment phase. The circumferential engagement of the locking pin 203 with the locking hole 102 prevents (restricts) relative rotation between the lens mount 101 and the camera mount 201 from the attachment phase. The second opening may be a groove extending in the radial direction. As described above, the second opening may have a bottom surface or may extend through the lens mount 101 in the central axis direction.

[0031] A circumferential groove 111a is formed between the inner and outer circumferential portions of the lens mounting surface 111.

[0032] The diameter fitting portion 109 is the portion whose outer peripheral surface fits (joins) with the inner peripheral surface of the diameter fitting portion provided on the camera mount 201 in the radial direction.

[0033] Three lens claws 107a, 107b, and 107c are bayoneted to camera claws located at three positions in the circumferential direction of the camera mount 201. Lens claws 107a, 107b, and 107c protrude from the inside to the outside in the radial direction of the lens mount 101, while camera claws protrude from the outside to the inside in the radial direction of the camera mount 201.

[0034] Next, the arrangement (phase) of the lens claws 107a to 107c in the lens mount 101 will be described. For example... Figure 3A As shown, when viewed from the camera side along 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 attached phase) across the central axis (optical axis O). Lens claw portions 107b and 107c are arranged sequentially from lens claw portion 107a in a clockwise direction. Lens claw portions 107b and 107c are arranged circumferentially on both sides of the locking hole portion 102 (the locking pin 203 in the attached phase).

[0035] In the following text, the space between the lens claw portion (first connecting portion) 107c and the lens claw portion 107a will be referred to as the first space 108a, and the space between the lens claw portion 107a and the lens claw portion (second connecting portion) 107b will be referred to as the second space 108b. The space between the lens claw portion 107b and the lens claw portion 107c will be referred to as the third space 108c. One end and the other end of the lens claw portion 107a in the circumferential direction are referred to as end portions 107a1 and 107a2, respectively; one end and the other end of the lens claw portion 107b in the circumferential direction are referred to as end portions 107b1 and 107b2, respectively; and one end and the other end of the lens claw portion 107c in the circumferential direction are referred to as end portions 107c1 and 107c2, respectively. Figure 3A In the middle, the end pieces 107a1, 107a2, 107b1, 107b2, 107c1 and 107c2 are arranged sequentially in a clockwise direction.

[0036] 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 3A As shown, when viewing the lens mount 101 in the central axis direction, the straight 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. The straight line orthogonal to reference line L1 and passing through the central axis is defined as L2. The side where the locking hole 102 is located is defined by the straight line L2. Figure 3AThe left side of the lens claw (in the image) is referred to as the locking side. Among the lens claw portions 107a to 107c, lens claw portions 107c and 107b, each having at least a portion arranged on the locking side, are respectively referred to as the first lens claw portion and the second lens claw portion. With the straight line L2 as the boundary, they are arranged across the central axis on opposite sides (in the image). Figure 3A The lens claw portion 107a on the right side of the lens is called the opposite side lens claw portion (opposite side connecting portion).

[0037] Let θ1 be the angle formed by the reference line L1 and the straight line L3, where the straight line L3 passes through the central axis and the end 107c1 of the first lens claw 107c closer to the locking hole 102. Let θ2 be the angle formed by the reference line L1 and the straight line L4, where the straight line L4 passes through the central axis and the end 107b2 of the second lens claw 107b closer to the locking hole 102.

[0038] At this point, the following inequality (1) can be satisfied: 0.65 ≤ θ1 / θ2 ≤ 1.35 (1).

[0039] In this embodiment, θ1 = 54°, θ2 = 42° and θ1 / θ2 = 1.29, thus satisfying inequality (1). Furthermore, θ1 is greater than θ2. In this case, inequality (1) becomes as follows: 1.00 < θ1 / θ2 ≤ 1.35.

[0040] θ1 and θ2 can be equal to each other, and in this case, θ1 / θ2 becomes 1.00. That is, when θ1≥θ2, inequality (1) becomes as follows: 1.00 ≤ θ1 / θ2 ≤ 1.35.

[0041] Inequality (1) can be replaced by the following inequality (1a): 0.70 ≤ θ1 / θ2 ≤ 1.30 (1a).

[0042] 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).

[0043] 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.

[0044] like Figure 3AAs shown, when the lens mount 101 (lens device 100) is in the first orientation with the locking hole 102 located on the horizontal side (left side) of the central axis, θ2, which is the angle relative to the reference line L1 on the gravity direction side, is smaller than θ1 relative to the side of the reference line L1 opposite to the gravity direction side. In other words, when the lens mount 101 is in the first orientation, the first lens claw 107c is located closer to the gravity direction than the second lens claw 107b. The relationship between θ1 and θ2 can suppress the tip of the lens device 100 from tilting in the gravity direction under the first orientation.

[0045] That is, in the lens mount 101, when viewed from the locking hole 102, the first lens claw 107c and the second lens claw 107b are arranged at approximately equidistant positions (phase). In other words, the locking hole 102 is approximately located at the center between the first lens claw 107c and the second lens claw 107b in the circumferential direction. Due to the arrangement of the lens claws, the lens mount 101 can be attached to the camera mount 201 more stably.

[0046] In this way, the locking hole 102 (locking pin 203) for fixing the lens mount 101 relative to the camera mount 201 in the circumferential direction, and the first lens claw 107c and the second lens claw 107b for fixing the position of the lens mount 101 in the central axis direction are arranged in a well-balanced manner. Therefore, even if external forces are applied to the lens device 100 from various directions or the orientation of the lens device 100 changes, the attachment of the lens device 100 to the camera 200 can be maintained more stably.

[0047] 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 3A As shown, the reference line L1 overlaps with the opposite lens claw 107a. The locking hole 102 is approximately located at the center between the first lens claw 107c and the second lens claw 107b, and the opposite lens claw 107a is located at the aforementioned position. That is, the locking hole 102 and the three lens claws 107a to 107c are arranged at approximately a regular interval of about 90° in the circumferential direction. Therefore, the attachment of the lens device 100 to the camera 200 can be maintained more stably.

[0048] like Figure 3AAs shown, let the angle formed by the reference line L1 and the straight line L5 be θ3, where the straight line L5 passes through the central axis and the end 107a1 of the opposite lens claw 107a closer to the first lens claw 107c. Let the angle formed by the reference line L1 and the straight line L6 be θ4, where the straight line L6 passes through the central axis and the end 107a2 of the opposite lens claw 107a closer to the second lens claw 107b. At this time, for θ3 and θ4, the lens mount 101 can satisfy the following inequality (2) or (2a): 0.60 ≤ θ3 / θ4 ≤ 0.90 (2), 0.60 ≤ θ3 / θ4 ≤ 0.80 (2a).

[0049] Satisfying the above inequality means that, in Figure 3A In the middle, when the opposite lens claw 107a is divided into an upper part and a lower part relative to the reference line L1 which serves as the boundary, the lower part is slightly longer than the upper part. The upper limit of inequality (2a) can be 0.70.

[0050] In this embodiment, θ3 = 21°, θ4 = 32°, and θ3 / θ4 = 0.66, thus satisfying inequality (2). In this embodiment, θ4 is greater than θ3. When θ3 / θ4 becomes higher than the upper limit of inequality (2), the lower portion becomes excessively long relative to the upper portion of the relative side lens claw 107a relative to the reference line L1 as the boundary. In this case, the length of the second space 108b becomes shorter, and therefore can be shortened to insert the phase (from Figure 3A The attached phase (the phase rotated approximately 60° clockwise) extends through the length of the camera claw in the second space 108b. As a result, the area of ​​the region where the attached phase, obtained by rotating approximately 60° counterclockwise from the inserted phase, overlaps with the second lens claw 107b in the central axis direction becomes too small, and stable attachment may not be achieved. When θ3 / θ4 becomes lower than the lower limit of inequality (2), the following effect may not be obtained due to the lower portion of the opposite lens claw 107a being longer than the upper portion.

[0051] Figure 3A An example is shown of a lens mount 101 in its normal orientation (image sensor facing horizontally and the long side of the image sensor being horizontal), which is the most common orientation of the camera 200 during recording. In this case, Figure 3AThe downward direction is the direction of gravity. In order to prevent the lens device 100, which is in a normal orientation, from tilting relative to the camera 200 towards the ground due to its own weight, the lower part of the lens claw 107a on the opposite side may be longer than the upper part relative to the reference line L1, which serves as the boundary.

[0052] like Figure 3A As shown, both the first lens claw 107c and the second lens claw 107b overlap with the straight line L2 used as the aforementioned boundary line. This configuration can suppress changes in the orientation of the lens device 100 in the direction of tilting towards the ground.

[0053] The lens mount 101 can satisfy the following inequality (3): 90° < θ1+θ2 < 180° (3).

[0054] Inequality (3) can be rewritten as the following inequality (3′): 90° < θ < 180° (3′), Where θ (=θ1+θ2) is the angle formed by the lines L3 and L4.

[0055] Satisfying inequality (3) means that the circumferential angle between the first lens claw 107c and the second lens claw 107b is an obtuse angle. As described above, in this embodiment, θ1 = 54°, θ2 = 42° and θ (= θ1 + θ2) = 96°, thus satisfying inequality (3′). The upper limit of inequality (3′) can be set to 120° or 100°.

[0056] An angle θ being obtuse 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 separated first lens claw 107c and the second lens claw 107b (i.e., the region where some play may occur in the central axis direction). Therefore, from the insertion phase to the attachment phase, the lens mount 101 receives contact with the forceped locking pin 203 in the region where some play may occur. This configuration can suppress the portion of the lens mount surface 111 from the insertion phase to the attachment phase where the locking pin 203 contacts and slides (by...). Figure 3A Wear (indicated by the dotted line in the diagram). Furthermore, this embodiment can further suppress wear because the circumferential length of the third space 108c is longer than the respective circumferential lengths of the first space 108a and the second space 108b.

[0057] This embodiment satisfies the following inequality (4): 40° < θ1 < 70° 40° < θ2 < 70° (4).

[0058] 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°.

[0059] In this embodiment, the first lens claw 107c and the second lens claw 107b can be arranged in a well-balanced manner relative to the locking hole 102, because the first lens claw 107c and the second lens claw 107b overlap with the straight line L2 used as the boundary line.

[0060] Next, we will refer to Figure 4A and Figure 4B Describe the arrangement (phase) of the camera claw of the camera mount 201. Figure 4A The camera mount 201 is shown as an example when viewed from the housing side (image side) of the camera 200. Figure 4B Examples along Figure 4A The cross-sectional view of camera mounting component 201 taken from line BB in the figure.

[0061] Camera mount 201 from the housing side (in) Figure 4B Starting from the left side (center), the lens mount 101 includes camera claw portions 208a, 208b, and 208c, a diameter fitting portion 210, and a camera mounting surface 211. The camera mounting surface 211 is formed as a plane facing the lens side. The diameter fitting portion 210 has an inner peripheral surface that fits (engages) with the outer peripheral surface of the diameter fitting portion 109 of the lens mount 101.

[0062] The camera claws 208a to 208c are formed in a manner that protrudes radially inward at three positions in the circumferential direction of the inner periphery of the camera mount 201.

[0063] like Figure 4A As shown, the camera mounting component 201 has a pin hole portion 203a and four screw holes 206a. The locking pin 203 passes through the pin hole portion 203a, and the four screws 206 are inserted into the four screw holes 206a.

[0064] like Figure 6 and Figure 7 As shown, the lens device 100 is attached to the camera 200. First, as... Figure 6 As shown, the lens device 100 is arranged relative to the camera 200 such that the lens mount 101 is in an insertion phase about the optical axis (central axis) relative to the camera mount 201. In the insertion phase, the locking pin 203 is engaged by... Figure 3AThe position indicated by D in the diagram faces the lens mounting surface 111.

[0065] Next, the lens assembly 100 moves toward the camera 200 in the optical axis direction (central axis direction) to insert the lens mount 101, which is in the insertion phase, into the camera mount 201. At this time, the lens claws 107a to 107c pass through the three spaces 209 between the camera claws 208a to 208c (see...). Figure 4A and Figure 4B Similarly, camera claws 208a to 208c pass through the first space 108a to the third space 108c between lens claws 107a to 107c. When lens mounting surface 111 contacts camera mounting surface 211 in this manner, locking pin 203, which is already in the protruding position, contacts lens mounting surface 111 (bottom surface of circumferential groove 111a) and is pushed into the retracted position.

[0066] Next, the lens mount 101 (lens device 100) is positioned relative to the camera mount 201 (camera 200) by... Figure 6 Rotate around the optical axis in the direction indicated by the arrow until the position of the locking hole 102 is aligned with the position of the locking pin 203. Figure 7 The attachment phase is shown. Before the lens mount 101 reaches the attachment phase, the lens claws 107a to 107c are pulled toward the camera side by the mounting force member 207 provided on the back of the camera claws 208a to 208c, and thus the lens mount surface 111 presses against the camera mount surface 211. Therefore, via the mounting force member 207, the lens claw 107c overlaps with the camera claw 208c in the optical axis direction, the lens claw 107b overlaps with the camera claw 208b in the optical axis direction, and the lens claw 107a overlaps with the camera claw 208a in the optical axis direction. Therefore, the lens mount 101 is connected to the camera mount 201 in the optical axis direction.

[0067] In the attachment phase, the locking pin 203, which is moved to the protruding position by spring force, enters the locking hole 102 and engages with the locking hole 102 in the circumferential direction. That is, the locking hole 102 has an inner dimension that contacts the locking pin 203 at least in the circumferential direction of the lens mount 101. Therefore, rotation of the lens mount 101 in the circumferential direction from the attachment phase toward the insertion phase is prevented (restricted).

[0068] Therefore, the connection and rotation locking of the lens mount 101 and the camera mount 201 are completed (i.e., the attachment of the lens device 100 to the camera 200).

[0069] When the lens assembly 100 is detached from the camera 200, the user pushes the unlocking operation member 204 provided on the camera 200 to move the locking pin 203 from the protruding position to the retracted position and retract the locking pin 203 from the locking hole portion 102. This allows the lens mount 101 to rotate relative to the camera mount 201 toward the insertion phase. Then, the lens assembly 100 is pulled out from the camera 200 toward the subject side, such that the lens claw portions 107a to 107c of the lens mount 101 rotated to the insertion phase pass through the space 209 between the camera claw portions 208a to 208c of the camera mount 201.

[0070] Here, from the insertion phase, when the camera mount surface 211 and the lens mount surface 111 are in contact with each other, to the attachment phase, the locking pin 203, which is forcefully applied in the protruding direction, presses against the lens mount surface 111. That is, from the insertion phase to the phase immediately preceding the attachment phase, a force tending to separate the two mounts is applied between the lens mount 101 and the camera mount 201. Therefore, from the insertion phase to the phase immediately preceding the attachment phase, the user can press the two mounts towards each other with force. In other words, before the individual lens claws and individual camera claws begin to overlap each other in the optical axis direction, the two mounts can be pressed towards each other with a force greater than the force applied by the locking pin 203. As a result, from the insertion phase to the attachment phase, the locking pin 203 presses against the lens mount surface 111... Figure 3A The area indicated by the dashed line in the text is the area during which the slide occurs.

[0071] Because the locking pin 203, which prevents rotation of the lens mount 101 relative to the camera mount 201, has high strength, a high-hardness material such as stainless steel is used for the locking pin 203. On the other hand, the material of the lens mount 101 can be aluminum alloy, copper alloy such as brass, or resin, which each have lower strength than the locking pin 203. Therefore, in the case of repeated attachment of the lens device 100 to the camera 200 and removal of the lens device 100 from the camera 200, the contact portion 102a of the contact locking pin 203 in the locking hole portion 102 may wear. Due to this wear of the locking hole portion 102, it may be impossible to accurately determine the attachment phase of the lens mount 101 to the camera mount 201 (i.e., circumferential clearance may occur between the lens mount 101 and the camera mount 201).

[0072] Therefore, the lens mount 101 according to this embodiment has Figure 5A and Figure 5BThe configuration is shown. Specifically, the lens mount 101 includes a mount base 131 as a first member, having a lens mount surface 111, a diameter fitting portion 109, and lens claw portions 107a to 107c, and an engagement member 132 as a second member, different from the mount base 131 and having a locking hole portion 102. The engagement member 132 engages with an attachment portion 113, which is formed in the mount base 131 as a first opening, extending circumferentially and having a concave shape relative to the lens mount surface 111. The engagement member 132 is secured by a screw 133 as a fixing member, which is inserted into a hole in the mount base 131 that opens radially from the outside to the inside, serving as a third opening. The engagement member 132 has a screw hole (third opening) into which the screw 133 is inserted and tightened.

[0073] like Figure 10A and Figure 10B As shown, a groove (third opening) 134 extending through the central axis and extending circumferentially can be formed in the joining member 132. Figure 10C As shown, the screw 135 inserted into the groove 134 from the lens mounting surface 111 side can be tightened into the screw hole (third opening) 104a formed in the lens barrel 104. Therefore, the connecting member 132 can be fixed to the mounting base 131. However, in this case, the screw 135, as a fixing member, does not contact the mounting base 131.

[0074] exist Figure 10A , Figure 10B and Figure 10C In the middle, the groove 134 is located below the locking hole 102, but it can be located above the locking hole 102.

[0075] In any of the above configurations, loosening the screws (133, 135) allows the worn engagement member 132 of the contact portion 102a to be replaced relative to the mounting base 131.

[0076] When the screws (133, 135) are loosened, the circumferential position of the engaging member 132 can be adjusted using the gap S between the inner end face of the attachment portion 113 and the engaging member 132 in the circumferential direction. That is, the engaging member 132 is spaced apart from the inner end face of the attachment portion 113 in the circumferential direction to allow adjustment of the circumferential position.

[0077] For example, when the lens device 100 combined with the camera 200 is an anamorphic lens (or similar lens) that compresses an optical image in a specific direction, it is necessary to accurately align the phase of the lens device 100 with the image sensor 202. For example, in the case where the anamorphic lens compresses the optical image in the horizontal direction, the compression direction is in phase with the vertical direction of the image sensor 202.

[0078] In this configuration, using the output values ​​of the gyroscope sensor mounted on the camera 200 and the gyroscope sensor mounted on the lens device 100, the screw 133 can be tightened to secure the coupling member 132 to the mounting base 131 while the relative positions of the coupling member 132 and the mounting base 131 are aligned. Since the screw 133 is arranged to be accessible from the outside of the lens mount 101, the coupling member 132 can be easily replaced and its position adjusted.

[0079] Instead of fixing the connecting member 132 to the mounting base 131 by fixing the fixing member, the connecting member 132 can be fixed to the mounting base 131 by adhesive bonding or press fitting.

[0080] Figure 8A Examples of passing through Figure 1 The lens terminal unit 125 and camera terminal unit 225 shown are configured for communication between the lens device 100 and the camera 200. Lens 601 and... Figure 1 The image-taking optical system shown corresponds to the zoom lens ZL and the focusing lens FL. The lens control unit 603 is... Figure 1 The lens CPU is shown. Mount 600 collectively illustrates the lens mount 101 and camera mount 201 connected to each other. Lens drive unit 602 collectively illustrates... Figure 1 The drive units 121 to 124 are shown. Sensor 611 is... Figure 1 The image sensor 202 is shown. The lens control unit 603 can communicate with the camera control unit 618 via the terminals described later. These communications include first, second, and third communications.

[0081] The camera 200 includes an A / D converter 612 that converts analog signals output from a sensor 611 into digital signals, and an image processing unit 613 that performs various image processing operations on the digital signals output from the A / D converter 612 to generate video signals. The video signals (still images or moving images) generated by the image processing unit 613 are displayed on a display unit 614 or recorded in a recording medium 615.

[0082] The camera 200 also includes a memory 616, which serves as a buffer during video signal processing and stores operating programs used by the camera control unit 618. The camera 200 includes a camera operation input unit 617, which includes a power switch for turning the power on / off, a camera switch for starting video signal recording, and a selection / setting switch for setting various menus.

[0083] The camera control unit 618 is a microcomputer that performs various settings based on signals input from the camera operation input unit 617 and controls communication with the lens control unit 603 in the lens device 100 via the mounting piece 600.

[0084] Figure 8B Examples are shown of terminals disposed on mounting member 600 (lens terminal unit 125 and camera terminal unit 225) and circuitry connected to the terminals. Mounting member 600 includes VDD and VBAT terminals for supplying power from camera 200 to lens device 100, and DGND and PGND terminals as ground terminals. Mounting member 600 also includes communication terminals comprising LCLK, DCL, DLC, DLC2, CS, and DCA terminals for communication between camera control unit 618 and lens control unit 603. Mounting member 600 includes MIF terminals for detecting lens device 100 attached to camera 200 and TYPE terminals for identifying the type of accessory device attached to camera 200.

[0085] Figure 9A Examples are shown of terminals 303a to 303k and 303m located on lens mount 101 and lens terminal unit 125 when viewed from the image side. Figure 9B Examples are shown of terminals 303a to 303k and 303m located on the lens mount 101 and lens terminal unit 125 when viewed at an angle from the image side.

[0086] like Figure 9A As shown, the lens terminal unit 125 includes terminals (accessory electrical contacts) 303a to 303k and 303m arranged on an arc-shaped array line 3008. Terminal 303a corresponds to... Figure 8B The VDD terminal shown on the lens device side corresponds to the VBAT terminal, terminal 303c to the TYPE terminal, terminal 303d to the PGND terminal, and terminal 303e to the MIF terminal. Terminal 303f corresponds to the DCL terminal, terminal 303g to the DLC terminal, terminal 303h to the LCLK terminal, terminal 303i to the DLC2 terminal, terminal 303j to the DCA terminal, terminal 303k to the CS terminal, and terminal 303m to the DGND terminal.

[0087] In this configuration, when the lens device 100 (lens mount 101) rotates from the insertion phase to the attachment phase, terminals 303a to 303k and 303m on the lens device side contact the corresponding terminals (camera electrical contacts) on the camera side. Therefore, power is supplied from the camera 200 to the lens device 100, and communication between the lens control unit 603 and the camera control unit 618 is possible.

[0088] Figure 5B and Figure 10B The circumferential width of the gap S shown (i.e., the adjustable range of the position of the engaging member 132) is limited to the range within which terminals 303a to 303k and 303m can maintain contact with the corresponding terminals of the camera 200. In other words, the position of the engaging member 132 is adjustable while the camera electrical contacts and the accessory electrical contacts are in contact with each other.

[0089] The first opening in the mounting base 131 can be a continuous groove covering the entire circumference of the mounting base 131, or it can be a cut formed by cutting out a portion of the mounting base 131. The first opening can have a bottom surface, or it can extend through the mounting base 131.

[0090] The engaging member 132 can be attached to a component other than the mounting base 131. To improve positioning accuracy, etc., the engaging member 132 can be attached to the mounting base 131.

[0091] The circumferential position of the engaging member 132 relative to the mounting base 131 is adjustable; however, instead, the diameter of the recess (second opening) can be variable, or a mechanism can be provided in which the circumferential position of the engaging member is fixed and the circumferential position of the second opening is variable. That is, the position of the second opening relative to the protrusion is adjustable.

[0092] The lens mount configurations described in the above embodiments can be applied to accessory mounts on accessory devices other than lens devices that can be attached to and detached from a camera. Examples of such accessory devices include adapters (intermediate adapters) for connecting a camera and a lens device, extenders, and caps for protecting the camera mount. The adapter may have functionality for switching communication methods between the camera and the lens device, or may include optical elements such as lenses or filters.

[0093] 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.

[0094] Various embodiments may provide an accessory mounting piece that allows for the replacement and repositioning of a second component with a recess against a first component.

Claims

1. An accessory mounting member capable of being attached to and detached from a camera mount having a first mounting surface and a protrusion, the accessory mounting member comprising: The first component has a second mounting surface facing the first mounting surface when the accessory mounting is attached to the camera mounting; as well as The second component is configured to restrict circumferential movement relative to the protrusion when the accessory mount is attached to the camera mount. The characteristic feature is that the second component is arranged in a first opening provided in the second mounting surface.

2. The accessory mounting component according to claim 1, characterized in that, The second member restricts movement in the circumferential direction after the second member contacts the protrusion.

3. The accessory mounting component according to claim 1, characterized in that, When viewed along the central axis, the second member has a second opening. Wherein, when the accessory mounting part is attached to the camera mounting part, the protrusion is arranged within the second opening.

4. The accessory mounting component according to claim 1, characterized in that, The second component can be attached to the first component and can be detached from the first component.

5. The accessory mounting component according to claim 1, characterized in that, The position of the second component can be adjusted relative to the first component.

6. The accessory mounting component according to claim 5, characterized in that, The camera mount and the accessory mount each include electrical contacts. The position of the second component can be adjusted when the electrical contacts of the camera mount and the accessory mount are in contact with each other.

7. The accessory mounting component according to claim 1, characterized in that, The second member engages with the first opening in the radial direction.

8. The accessory mounting component according to claim 1, characterized in that, The inner end face of the first opening and the second component are spaced apart from each other in the circumferential direction.

9. The accessory mounting component according to claim 1, further comprising a fixing member for securing the second component to the first component.

10. The accessory mounting component according to claim 9, characterized in that, When viewed in the radial direction, both the first and second components have a third opening. The fixing member is inserted into the third opening to fix the second member to the first member.

11. The accessory mounting component according to claim 9, characterized in that, When viewed along the central axis, the second member has a third opening. The fixing member is inserted into the third opening to fix the second member to the first member.

12. The accessory mounting component according to claim 11, characterized in that, The fixing member secures the second member to the first member without contacting the first member.

13. The accessory mounting component according to any one of claims 1 to 12, characterized in that, The camera mount and the accessory mount each include two claws. Wherein, when the accessory mounting part is attached to the camera mounting part, when viewed in the central axis direction, the two claws of the camera mounting part and the two claws of the accessory mounting part overlap each other, and When viewed along the central axis, the following inequality is satisfied: 90° < θ < 180° Wherein, θ is the angle formed between a line passing through the central axis of the fitting mount and the end of one of the two claws of the fitting mount closer to the protrusion, and a line passing through the central axis and the end of the other of the two claws closer to the protrusion.

14. An accessory device, comprising: Accessory mounting component according to any one of claims 1 to 13; And optical components.

15. An accessory device, comprising: Accessory mounting parts according to any one of claims 1 to 13, The accessory device is characterized in that it can be attached to the lens device and detached from the lens device.

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