JP2019207428A - accessory - Google Patents

Abstract

To appropriately attach an accessory to a camera body in a usable state.SOLUTION: An accessory comprises: a cylindrical part 312 extending in an optical axis direction from an inner peripheral part of an accessory-side mount; an accessory-side terminal group 320 arranged inside the cylindrical part and consisting of a plurality of accessory-side terminals in contact with a camera body-side terminal; and first to fourth accessory-side projections 390a to 390d projecting from the cylindrical part toward an outer peripheral direction of the accessory-side mount and extending in a circumferential direction centered on the optical axis. The first accessory-side projection 390a and the third accessory-side projection 390c are arranged on an accessory-side first straight line L1 passing through the center of the accessory-side terminal group and the optical axis and an accessory-side third straight line L3 intersecting the optical axis substantially at 45 degrees. The second accessory-side projection 390b and the fourth accessory-side projection 390d are arranged on the accessory-side third straight line and an accessory-side fourth straight line L4 orthogonal to the optical axis.SELECTED DRAWING: Figure 5

Description

  The present invention relates to accessories.

  An accessory that can be attached to and detached from the camera body is known (for example, Patent Document 1). Conventionally, it has been necessary to attach accessories to the camera body in a properly usable state.

JP-A-8-43910

The accessory according to the first aspect of the present invention is a rectangular image having an upper side and a lower side and a right side and a left side when the camera body is held in a horizontal position, and an image sensor on which subject light is incident about the optical axis; A body-side terminal group composed of a plurality of body-side terminals arranged in an arc shape above the upper side of the image sensor, and a circle centering on the optical axis disposed outside the image sensor and the body-side terminal group An annular body-side mount, a first body-side protrusion protruding from the body-side mount toward the inner diameter direction, a second body-side protrusion protruding from the body-side mount toward the inner diameter direction, and the body side A third body side projecting portion projecting from the mount toward the inner diameter direction, and a fourth body side projecting portion projecting from the body side mount toward the inner diameter direction, the front side of the body side terminal group The first body-side protruding portion is divided into four regions divided by a body-side first straight line passing through the center of the arc direction and the optical axis, the body-side first straight line, and a body-side second straight line orthogonal to the optical axis. And an accessory that can be attached to and detached from the camera body in which the second body-side protruding portion, the third body-side protruding portion, and the fourth body-side protruding portion are respectively disposed, and centering on the optical axis An accessory-side mount that contacts the body-side mount; a cylindrical portion that extends in the optical axis direction from an inner peripheral edge of the accessory-side mount; and an inner side of the cylindrical portion that is disposed on the camera body. An accessory-side terminal group consisting of a plurality of accessory-side terminals that come into contact with the body-side terminal when mounted, and protrudes from the cylindrical portion toward the outer periphery of the accessory-side mount, and the light A first accessory-side projecting portion extending in a circumferential direction centered on the first portion, a first accessory-side projecting portion projecting from the cylindrical portion toward the outer peripheral direction of the accessory-side mount, and extending in a circumferential direction centered on the optical axis. 2 accessory-side protruding portions, a third accessory-side protruding portion that protrudes from the cylindrical portion toward the outer peripheral direction of the accessory-side mount, and extends in a circumferential direction around the optical axis; A fourth accessory-side protruding portion that protrudes toward the outer peripheral direction of the accessory-side mount and extends in the circumferential direction around the optical axis, and the accessory passes through the center of the accessory-side terminal group and the optical axis. The first accessory side protrusion and the third accessory side protrusion are arranged on an accessory side third straight line that intersects the first side straight line at approximately 45 degrees in the optical axis, and the accessory side third straight line is arranged. The second accessory side protrusion and the fourth accessory side protrusion are arranged on an accessory side fourth straight line that is orthogonal to the line and the optical axis.
An accessory according to a second aspect of the present invention is an image sensor that has a rectangular shape having an upper side and a lower side when the camera body is held in a horizontal position, and on which subject light is incident with the optical axis as the center. A body-side terminal group composed of a plurality of body-side terminals arranged in an arc shape at the upper part of the upper side, and an annular body side centered on the optical axis disposed outside the imaging device and the body-side terminal group An accessory that is attachable to and detachable from the camera body, the accessory-side mount that contacts the body-side mount, and the inner peripheral edge of the accessory-side mount. A cylindrical portion extending in the optical axis direction, and a plurality of accessory-side terminals that are disposed inside the cylindrical portion and come into contact with the body-side terminals when attached to the camera body. An accessory-side terminal group, a first accessory-side protruding portion that protrudes from the cylindrical portion toward the outer peripheral direction of the accessory-side mount and extends in a circumferential direction around the optical axis, and the accessory from the cylindrical portion A second accessory side projecting portion projecting toward the outer peripheral direction of the side mount and extending in a circumferential direction around the optical axis; and projecting from the cylindrical portion toward the outer peripheral direction of the accessory side mount; A third accessory-side projecting portion extending in a circumferential direction around the axis, and projecting from the cylindrical portion toward the outer peripheral direction of the accessory-side mount, and extending in the circumferential direction around the optical axis A fourth accessory-side projecting portion, on the accessory-side third straight line that intersects the accessory-side first straight line passing through the center of the accessory-side terminal group and the optical axis at approximately 45 degrees in the optical axis. The first accessory side protrusion and the third accessory side protrusion are disposed, and the third accessory side protrusion and the third accessory side fourth line on the accessory side fourth line orthogonal to the accessory side third straight line and the optical axis. 4 Accessory side protrusions are arranged.

It is sectional drawing which shows the structure of a camera system typically. It is a front view of the mount surface of the camera body seen from the interchangeable lens side. It is a front view of the mount surface of the camera body seen from the interchangeable lens side. It is a front view of the leaf | plate spring in a body side mount. It is a front view of the mount surface of the interchangeable lens seen from the camera body side. It is a front view of the mount surface of the interchangeable lens seen from the camera body side. It is a perspective view of the mount surface of an interchangeable lens. It is a front view of the body side nail | claw part and lens side nail | claw part in the insertion position seen from the interchangeable lens side. It is the front view of the body side nail | claw part and lens side nail | claw part in a mounting position seen from the interchangeable lens side. It is the front view and side view of a body side nail | claw part and a lens side nail | claw part in the excessive rotation state of a mounting direction seen from the interchangeable lens side. It is a side view of a body side nail | claw part and a lens side nail | claw part in the overrotation state of the removal direction seen from the interchangeable lens side. It is a front view of the body side nail | claw part and lens side nail | claw part in the 1st mistake insertion state seen from the interchangeable lens side. It is the front view of the body side nail | claw part and lens side nail | claw part in the 2nd mistake insertion state, the 3rd mistake insertion state, and the 4th mistake insertion state seen from the interchangeable lens side.

  FIG. 1 is a cross-sectional view schematically showing a configuration of a camera system 1 according to an embodiment of the invention. The camera system 1 includes a camera body 2 and an interchangeable lens 3 as an example of an accessory that can be attached to and detached from the camera body 2. Examples of other accessories that can be attached to and detached from the camera body 2 include a mount adapter, a teleconverter, and a wide converter.

  The interchangeable lens 3 includes a lens side mount 310, a lens side terminal holding unit 320, a lens side CPU 330, a lens side communication unit 340, a lens side storage unit 350, an imaging optical system 360, and a drive unit 370. The lens side mount 310 and the lens side terminal holding part 320 will be described in detail later.

  The lens side CPU 330 includes a microcomputer and its peripheral circuits. The lens side communication unit 340 performs predetermined data communication with the camera body 2. The lens side communication unit 340 is connected to a lens side terminal (described later) provided in the lens side terminal holding unit 320 and the lens side CPU 330. The lens side storage unit 350 is a nonvolatile storage medium. The lens side storage unit 350 is connected to the lens side CPU 330. The lens-side storage unit 350 stores a predetermined control program executed by the lens-side CPU 330 in advance. The lens-side CPU 330 controls the interchangeable lens 3 by reading a control program from the lens-side storage unit 350 and executing the program.

  The imaging optical system 360 forms a subject image on an imaging surface of an imaging element 270 described later. The optical axis O of the imaging optical system 360 coincides with the center position of the lens side mount 310 and a body side mount 210 described later. The imaging optical system 360 of FIG. 1 schematically includes a lens 361, a focusing lens 362, and a lens 363. The focusing lens 362 is a lens that adjusts the imaging position of the subject image. The driving unit 370 is connected to the lens side CPU 330 and includes an actuator (not shown). The drive unit 370 moves the focusing lens 362 forward and backward in the direction of the optical axis O (+ Z, −Z direction) by this actuator or the like.

  The camera body 2 includes a body side mount 210, a body side terminal holding unit 220, a body side CPU 230, a body side communication unit 240, a body side storage unit 250, a power feeding unit 260, and an image sensor 270. The body side mount 210 and the body side terminal holding part 220 will be described in detail later.

  The body side CPU 230 includes a microcomputer and its peripheral circuits. The body side CPU 230 performs various controls of the body. The body side communication unit 240 performs predetermined data communication with the interchangeable lens 3. The body side communication unit 240 is connected to a plurality of body side terminals (described later) provided on the body side terminal holding unit 220 and the body side CPU 230.

  The body side storage unit 250 is a nonvolatile storage medium. The body side storage unit 250 is connected to the body side CPU 230. The body-side storage unit 250 stores a predetermined control program executed by the body-side CPU 230 in advance. The body side CPU 230 controls the camera body 2 by reading a control program from the body side storage unit 250 and executing the program.

  The power feeding unit 260 has a power source, and supplies power to the camera body 2 and the interchangeable lens 3. The power feeding unit 260 is connected to a body side terminal (described later) provided in the body side terminal holding unit 220 and the body side CPU 230. The image sensor 270 is a solid-state image sensor such as a CCD or CMOS. The image sensor 270 is connected to the body side CPU 230, images a subject, and outputs an image signal. Description of the processing of the output imaging signal is omitted.

(Explanation of lens mount mechanism)
The camera system 1 of the present embodiment includes a so-called bayonet-type lens mount mechanism. Hereinafter, the body side mount 210 included in the camera body 2 and the lens side mount 310 included in the interchangeable lens 3 will be described in order.

(Body side mount 210)
2 and 3 are views schematically showing the mount of the camera body 2 viewed from the interchangeable lens 3 side. 2 and 3 show a state in which the camera body 2 is held in a horizontal position. As shown in FIG. 2, when the camera body 2 is held in the horizontal position, the rectangular imaging element 270 has a horizontal length, that is, a long side becomes an upper side and a lower side, and a short side becomes a right side and a left side. The body-side first straight line B1 extending in the vertical direction Y of the camera body 2 shown by a solid line in FIG. 2 is viewed from the photographer when the photographer using the camera system 1 holds the camera body 2 in the horizontal position. The vertical direction. A body-side second straight line B2 extending in the horizontal direction X of the camera body 2 shown by a solid line in FIG. 2 is viewed from the photographer when the photographer using the camera system 1 holds the camera body 2 in the horizontal position. Left and right direction.

  The body-side first straight line B1 and the body-side second straight line B2 are orthogonal to each other on the optical axis O (center). As shown by a one-dot chain line in FIG. 2, lines extending in the direction intersecting at 45 degrees on the optical axis O of the image sensor 270 with the body-side first straight line B1 and the body-side second straight line B2 are shown on the body-side third straight line B3. The body-side fourth straight line B4.

The mount of the camera body 2 includes the body side mount 210 and the body side terminal holding portion 220 described above with reference to FIG. The body-side mount 210 has an annular reference surface 211 that has a certain width and is disposed along a surface that is orthogonal to the optical axis O. Furthermore, the body side mount 210 has a body side first claw portion 290a, a body side second claw portion 290b, a body side third claw portion 290c, and a body side fourth claw portion 290d.
In the following description, the body side first claw portion 290a to the fourth claw portion 290d, which are these four projecting portions, are collectively referred to as a body side claw portion 290.

  The body side claw portions 290 are arranged at intervals from each other along the circular opening 212 of the body side mount 210. As shown in FIG. 2, the body side first claw portion 290a is in the upper right position, the body side second claw portion 290b is in the upper left position, the body side third claw portion 290c is in the lower left position, The nail | claw part 290d is each arrange | positioned in the lower right position. The body side first claw portion 290a is located above the body side second straight line B2 and on the right side of the body side first straight line B1, and the body side second claw portion 290b is located above the body side second straight line B2 and on the body side. In the left region of the first straight line B1, the body side third claw portion 290c is below the body side second straight line B2 and in the left region of the body side first straight line B1, and the body side fourth claw portion 290d is the body. It is respectively arranged in a region below the side second straight line B2 and on the right side of the body side first straight line B1.

The body-side first claw portion 290a and the body-side third claw portion 290c are respectively disposed in regions that are substantially the target with the optical axis O as the center on the body-side fourth straight line B4. The body-side second claw portion 290b and the body-side fourth claw portion 290d are respectively arranged on regions of the body-side third straight line B3 that are substantially targeted around the optical axis O.
As shown in FIG. 2, the center positions along the circumferential direction of the body side first claw portion 290a to the body side fourth claw portion 290d are the body side third straight line B3, the body side fourth straight line B4, and the like. Do not overlap.

As shown in FIG. 3, the circumferential lengths of the body-side first claw portion 290a to the body-side fourth claw portion 290d are different from each other. Specifically, the body side first claw portion 290a is the longest, the body side third claw portion 290c is the second longest, the body side fourth claw portion 290d is the third longest, and the body side second claw portion 290b is Shortest.
An angle α1 formed by a straight line connecting one end of the body-side first claw 290a and the optical axis O and a straight line connecting the other end of the body-side first claw 290a and the optical axis O is about 47 degrees, and 46 .5 degrees to 47.5 degrees.
An angle α3 formed by a straight line connecting one end of the body side third claw portion 290c and the optical axis O and a straight line connecting the other end of the body side third claw portion 290c and the optical axis O is about 42.5 degrees. It is between 42.0 degrees and 43.0 degrees.

An angle α4 formed by a straight line connecting one end of the body side fourth claw 290d and the optical axis O and a straight line connecting the other end of the body side fourth claw 290d and the optical axis O is about 42 degrees, and 41 .5 degrees to 42.5 degrees.
An angle α2 formed by a straight line connecting one end of the body-side second claw 290b and the optical axis O and a straight line connecting the other end of the body-side second claw 290b and the optical axis O is about 40 degrees, and 40 .Between 0 and 41.0 degrees.
The lengths in the radial direction (height of the claw portions) of the body side first claw portion 290a to the body side fourth claw portion 290d are the same. The lengths of the body side first claw portion 290a to the body side fourth claw portion 290d in the optical axis O direction (thickness of the claw portion) are the same.

  The body side claw portion 290 protrudes from the opening 212 of the body side mount 210 toward the optical axis O (the center of the image sensor 270), and on the circumference of the opening 212, there is a portion where the body side claw portion 290 exists; There is a portion where the body side claw portion 290 does not exist. In the following description, the space 280a between the body side first claw portion 290a and the body side fourth claw portion 290d on the circumference of the opening 212 of the body side mount 210 is referred to as a body side first insertion / extraction portion 280a.

  Similarly, a space 280b between the body side first claw portion 290a and the body side first claw portion 290b is formed between the body side second insertion / extraction portion 280b, the body side second claw portion 290b, and the body side third claw portion 290c. The space 280c between them is referred to as a body side third insertion / extraction portion 280c, and the space 280d between the body side third claw portion 290c and the body side fourth claw portion 290d is referred to as a body side fourth insertion / extraction portion 280d. The body side first insertion / extraction part 280a to the fourth insertion / extraction part 280d, which are these four spaces, are collectively referred to as a body side insertion / extraction part 280.

The circumferential lengths of the body side first insertion / extraction part 280a to the body side fourth insertion / extraction part 280d are different from each other. Specifically, the body side third insertion / extraction part 280c is the longest, the body side first insertion / extraction part 280a is the second longest, the body side fourth insertion / extraction part 280d is the third longest, and the body side second insertion / extraction part 280b is Shortest.
An angle β3 formed by a straight line connecting one end of the body-side third insertion / extraction part 280c and the optical axis O and a straight line connecting the other end of the body-side third insertion / extraction part 280c and the optical axis O is about 51 degrees. It is between 0 degrees and 52.0 degrees.
An angle β1 formed by a straight line connecting one end of the body-side first insertion / extraction part 280a and the optical axis O and a straight line connecting the other end of the body-side first insertion / extraction part 280a and the optical axis O is about 50 degrees, and 50 .Between 0 and 51.0 degrees.

An angle β4 formed by a straight line connecting one end of the body-side fourth insertion / extraction part 280d and the optical axis O and a straight line connecting the other end of the body-side fourth insertion / extraction part 280d and the optical axis O is about 46 degrees, and 45 Between 5 and 46.5 degrees.
An angle β2 formed by a straight line connecting one end of the body-side second insertion / extraction part 280b and the optical axis O and a straight line connecting the other end of the body-side second insertion / extraction part 280b and the optical axis O is about 39 degrees, 39 .Between 0 and 40.0 degrees.
Of course, the angles α1 to α4 of the four body-side first claw portions 290a to the body-side fourth claw portion 290d and the angles β1 to β4 of the four body-side first insertion / extraction portions 280a to the body-side fourth insertion / extraction portion 280d. The total value is 360 degrees.

  The body-side first insertion / extraction part 280a is located above the body-side third straight line B3 and below the body-side fourth straight line B4, and the body-side second insertion / extraction part 280b is located above the body-side third straight line B3. The body side third insertion / extraction part 280c is located in the region above the side fourth straight line B4, and the body side fourth insertion / extraction part 280d is located in the region below the body side third straight line B3 and above the body side fourth straight line B4. It is arranged in a region below the body side third straight line B3 and below the body side fourth straight line B4.

The body-side first insertion / extraction part 280a and the body-side third insertion / extraction part 280c are respectively arranged in regions substantially on the optical axis O on the line of the body-side second straight line B2. The body-side second insertion / extraction part 280b and the body-side fourth insertion / extraction part 280d are respectively arranged in regions substantially on the optical axis O about the optical axis O on the body-side first straight line B1.
In addition, as shown in FIG. 2, the center positions along the circumferential direction of the body side first insertion / extraction part 280a to the body side fourth insertion / extraction part 280d are the body side first straight line and the body side second direct distance B2, respectively. Do not overlap.

  Inside the opening 212 of the body-side mount 210, a body-side terminal holding portion 220 including a plurality of body-side terminals is provided. The body side terminal holding portion 220 has an arc shape corresponding to the shape of the annular body side mount 210. The body side terminal holding part 220 is disposed on the inner peripheral side of the opening 212 of the body side mount 210 and on the upper part of the image sensor 270, and is disposed on the center of the upper part of the image sensor 270 as shown in FIGS. It is preferable. That is, it is preferable that the center of the body side terminal holding part 220 in the circumferential direction is located on the body side first straight line B1.

  The body side first claw portion 290a is disposed at the upper right of the body side terminal holding portion 220, and the body side second insertion / extraction portion 280b is disposed at the upper left of the body side terminal holding portion 220. Therefore, the angle formed by the straight line connecting one end of the body side terminal holding part 220 and the optical axis O and the straight line connecting the other end of the body side terminal holding part 220 and the optical axis O is the body side first claw part 290a. The angle α1 is smaller than the angle obtained by adding the angle β2 of the body-side second insertion / extraction part 280b.

The body side terminal holding part 220 has a plurality of body side terminals as described above. The plurality of body-side terminals (referred to as body-side terminal group) are arranged in an arc on the upper part of the upper side of the image sensor 270. Each of the body side terminal groups is a conductive pin. The body side terminal group is pushed toward the −Z direction (FIG. 1) by a spring or the like (not shown).
Here, the −Z direction is a direction from the camera body 2 toward the interchangeable lens 3 and a direction toward the subject. Further, the + Z direction is a direction from the interchangeable lens 3 toward the camera body 2 and a direction toward the image sensor 270.

  The body side mount 210 has a hole through which the lock pin 214 passes. The hole through which the lock pin 214 passes is disposed at the upper right of the body side fourth claw portion 290d. That is, in the annular reference surface 211 of the body side mount 210, the hole of the lock pin 214 is disposed between the region where the body side fourth claw portion 290d exists and the region where the body side first claw portion 290a exists. The The lock pin 214 is pushed toward the −Z direction (subject side) by a spring (not shown) or the like. The lock pin 214 can move in the + Z direction (image sensor 270 side) against the biasing force of the spring by pressing a lock release button (not shown).

FIG. 4 is a schematic view of the mount of the camera body 2 from which the body side mount 210 is removed as viewed from the interchangeable lens 3 side. A first leaf spring 213a is provided at a position corresponding to the first body side claw portion 290a (the back side of the first body side claw portion 290a).
Similarly, a second leaf spring 213b is provided at a position corresponding to the second body side claw 290b (the back side of the second body side claw 290b), and a position corresponding to the third body side claw 290c (first A third leaf spring 213c is provided on the back side of the 3 body side claw portion 290c, and a fourth leaf spring is provided at a position corresponding to the 4th body side claw portion 290d (back side of the fourth body side claw portion 290d). 213d is provided.
In the following description, these four first leaf springs 213a to 213d are collectively referred to as leaf springs 213. The leaf spring 213 is disposed on the surface on the image sensor 270 side of the body side claw portion 290, and presses the object side surface of the lens side claw portion (described later) 390 facing the image sensor 270 side (+ Z direction).

  As shown in FIG. 4, the rear end portion of the mounting direction 44 of the body side terminal holding portion 220 is near the straight line B5 connecting the optical axis O and the rear end portion of the first leaf spring 213a in the mounting direction 44 (described later). Be placed. The second plate spring 213b, the third plate spring 213c, and the fourth plate spring 213d are arranged around the optical axis O at approximately 90 ° intervals starting from the first plate spring 213a.

(Lens side mount 310)
5 and 6 are diagrams schematically showing the mount of the interchangeable lens 3 viewed from the camera body 2 side (viewed from behind the interchangeable lens 3). A lens-side first straight line L1 extending in the vertical direction Y of the interchangeable lens 3 shown by a solid line in FIG. 5 is viewed from the photographer when the photographer using the camera system 1 holds the camera body 2 in the horizontal position. The vertical direction. In addition, the lens side second straight L2 line extending in the horizontal direction X of the interchangeable lens 3 shown by a solid line in FIG. 5 indicates that the photographer who uses the camera system 1 holds the camera body 2 in the horizontal position. It is the left-right direction seen from.

  The lens side first straight line L1 and the lens side second straight line L2 are orthogonal to each other on the optical axis O (center) of the interchangeable lens 3. As shown by a one-dot chain line in FIG. 5, a line extending in the direction intersecting with the lens side first straight line L1 and the lens side second straight line L2 at 45 degrees on the optical axis O is represented by the lens side third straight line L3 and the lens side Let it be 4 straight lines L4. When the interchangeable lens 3 is mounted on the camera body 2 in a usable state, the body-side first straight line B1 and the lens-side first straight line L1 coincide with each other, and the body-side second straight line B2 and the lens-side second straight line L2 are The body-side third straight line B3 and the lens-side fourth straight line L4 are matched, and the body-side fourth straight line B4 and the lens-side third straight line L3 are matched. In addition, even if each straight line does not completely coincide, a deviation may occur within a range in which the interchangeable lens 3 can be attached to the camera body 2 in a properly usable state.

  The mount of the interchangeable lens 3 includes the lens side mount 310 and the lens side terminal holding unit 320 described above with reference to FIG. The lens side mount 310 is formed in an annular shape centering on the optical axis O of the interchangeable lens 3 and is disposed along a plane orthogonal to the optical axis O. The lens side mount 310 has a reference surface 311 that comes into contact with the reference surface 211 of the body side mount 210 when the interchangeable lens 3 is attached to the camera body 2. The reference surface 311 has an annular shape centered on the optical axis O, and is arranged along a surface orthogonal to the optical axis O. On the rear end surface of the reference surface 311 in the optical axis O direction, a lock pin sliding surface 309 on which a lock pin 214 (described later) is slid is attached in a cross section along the Z direction toward the −Z direction. It is formed in a concave shape. The lock pin sliding surface 309 has an annular shape centered on the optical axis O, and is disposed along a plane orthogonal to the optical axis O.

  The lens side mount 310 is fixed by screwing a fixing member disposed inside the interchangeable lens 3 with a screw 313. When the lens side mount 310 is viewed from the camera body 2 side, the screws 313 are arranged around the optical axis O at intervals of about 90 degrees. Further, the four screws 313 are respectively arranged on the outer periphery of four lens side claws 390 described later. The screws 313 are disposed on the outer periphery of both end portions in the circumferential direction of the lens side terminal holding portion 320.

The lens side mount 310 has a cylindrical portion 312 extending in the direction of the optical axis O from the inner peripheral edge (the inner peripheral edge of the reference surface 311). When the interchangeable lens 3 is attached to the camera body 2, the rear end of the cylindrical portion 312 in the optical axis O direction is located in a direction that protrudes toward the camera body 2 with respect to the reference surface 311. The lens side mount 310 has a lens side first claw portion 390a, a lens side second claw portion 390b, and a lens side third claw portion spaced apart from each other along the outer periphery of the rear end portion in the optical axis O direction of the cylindrical portion 312. 390c and a lens side fourth claw portion 390d.
In the following description, the lens side first claw portion 390a to the fourth claw portion 390d, which are these four protruding portions, are collectively referred to as a lens side claw portion 390.

  The lens side claw portion 390 is provided in a direction protruding from the outer peripheral edge portion of the cylindrical portion 312 of the lens side mount 310 toward the outer peripheral direction of the lens side mount 310 and is substantially orthogonal to the optical axis O. The lens side claw portion 390 extends in the circumferential direction with the optical axis O as the center. As shown in FIGS. 5 and 6, the lens side first claw 390a is in the upper left position, the lens side second claw 390b is in the upper right position, and the lens side third claw 390c is in the lower right position. The lens side fourth claw portion 390d is disposed at the lower left position. That is, the lens-side first claw 390a is located above the lens-side second straight line L2 and on the left side of the lens-side first straight line L1, and the lens-side second claw 390b is located above the lens-side second straight line L2. The lens side third claw portion 390c is located on the right side of the lens side first straight line L1, and the lens side third claw portion 390c is located below the lens side second straight line L2 and on the right side of the lens side first straight line L1. Are arranged below the lens-side second straight line L2 and on the left side of the lens-side first straight line L1, respectively.

In addition, the lens side first claw portion 390a and the lens side third claw portion 390c are located on the lens side third straight line L3 and in a region that is substantially the object about the optical axis O. 390b and the lens-side fourth claw portion 390d are respectively disposed on the lens-side fourth straight line L4 and in a substantially target region around the optical axis O.
The lens-side third straight line L3 and the lens-side fourth straight line L4 do not necessarily pass through the center positions along the circumferential direction of the lens-side first claw portion 390a to the lens-side fourth claw portion 390d.

  When the interchangeable lens 3 is mounted on the camera body 2, the body side claw portion 290 is disposed between the lens side mount 310 and the lens side claw portion 390 in the optical axis O direction. At this time, the lens side first claw portion 390a contacts the leaf spring 213a of the body side first claw portion 290a, the lens side second claw portion 390b contacts the leaf spring 213b of the body side second claw portion 290b, and the lens The side third claw portion 390c contacts the leaf spring 213c of the body side third claw portion 290c, and the lens side fourth claw portion 390d contacts the leaf spring 213d of the body side fourth claw portion 290d.

  The lens side claw portion 390 has a biased portion as a contact portion that is brought into contact with the leaf spring 213 and biased away from the body side claw portion 290. Note that the shape of the biased portion is not limited as long as the lens side claw portion 390 can receive a sufficient biasing force from the leaf spring 213, and the contact between the leaf spring 213 and the biased portion can be point contact, line contact, or surface contact. Any of contact may be sufficient. The shape and material of the leaf spring 213 may be changed as appropriate as long as the lens side claw portion 390 can be sufficiently pressed.

  When the leaf spring 213 of the body side claw 290 comes into contact with the lens side claw 390, the lens side claw 390 moves away from the body side claw 290 along the optical axis O from the leaf spring 213 (+ Z direction). Pressed. When the lens side claw portion 390 is pressed in the + Z direction (image pickup element 270 side), the lens side mount 310 is pressed toward the body side mount 210, and the mounting of the camera body 2 and the interchangeable lens 3 is stabilized.

The lens side claw portion 390 and the body side claw portion 290 do not need to have the same length in the circumferential direction, and the length of the lens side claw portion 390 in the circumferential direction can be pressed by the leaf spring 213. It can be changed as much as possible. Further, in the state where the interchangeable lens 3 is mounted on the camera body 2, it is not necessary for the entire surface of the lens side claw portion 390 and the entire surface of the body side claw portion 290 to face each other. May be different from the position of the circumferential end of the body side claw.
Further, the lens side claw portion 390 and the body side insertion / extraction portion 280 do not need to have substantially the same length in the circumferential direction, and the lens side inserted into the circumferential length of the body side insertion / extraction portion 280. The length of the claw part 390 in the circumferential direction may be less than that.
Similarly, the body side claw portion 290 and the lens side insertion / extraction portion 380 do not need to have the same length in the circumferential direction, and are inserted with respect to the circumferential length of the lens side insertion / extraction portion 380. The length of the claw part 290 in the circumferential direction may be less than that.

As shown in FIG. 6, the lengths in the circumferential direction of the lens side first claw portion 390a to the lens side fourth claw portion 390d are different from each other. Further, a straight line connecting one end in the circumferential direction of the lens side first claw portion 390a to the lens side fourth claw portion 390d and the optical axis O and the circumference of the lens side first claw portion 390a to the lens side fourth claw portion 390d. The angles formed by the other end of the direction and the straight line connecting the optical axis O are different from each other. Specifically, the lens side third claw 390c is the longest, the lens side first claw 390a is the second longest, the lens side fourth claw 390d is the third longest, and the lens side second claw 390b is Shortest.
An angle α7 formed by a straight line connecting one end of the lens side third claw portion 390c and the optical axis O and a straight line connecting the other end of the lens side third claw portion 390c and the optical axis O is about 48.5 degrees. , Between 48.0 degrees and 49.0 degrees.
An angle α5 formed by a straight line connecting one end of the lens-side first claw 390a and the optical axis O and a straight line connecting the other end of the lens-side first claw 390a and the optical axis O is about 48 degrees, and 47 Between 5 and 48.5 degrees.

An angle α8 formed by a straight line connecting one end of the lens side fourth claw 390d and the optical axis O and a straight line connecting the other end of the lens side fourth claw 390d and the optical axis O is about 44 degrees, and 43 .Between 0 and 45.0 degrees.
An angle α6 formed by a straight line connecting one end of the lens side second claw portion 390b and the optical axis O and a straight line connecting the other end of the lens side second claw portion 390b and the optical axis O is about 36 degrees, and 35 It is between 5 and 36.5 degrees.
An angle α6 formed by a straight line connecting one end of the lens side second claw portion 390b and the optical axis O and a straight line connecting the other end of the lens side second claw portion 390b and the optical axis O is a rotation angle described later. Smaller than.

  The lengths in the radial direction (the heights of the claw portions) of the lens side first claw portion 390a to the lens side fourth claw portion 390d are substantially the same. In addition, the length in the optical axis O direction (thickness of the claw portion) of the lens side first claw portion 390a to the lens side fourth claw portion 390d is substantially the same.

It should be noted that at least one of the lens side claws 390 may be partly cut out in a range that does not affect the mounting state with the camera body 2. Even if a part of the lens side first claw portion 390a is cut out, the entire projection portion and the cutout portion arranged in the region facing the body side first claw portion 290a are combined on the lens side. It is set as the 1st nail | claw part 390a. The same applies to the other lens side second to fourth claw portions 390b to 390d. As a notch method, the lens side first claw part 390a may be cut out so as to be divided into two or more in the circumferential direction, or the lens side first claw part 390a may be cut out so as to be partially cut off, The lens side first claw portion 390a may be cut out so that at least a part of the length in the radial direction is shortened. Therefore, the lens side claw portion 390 may be cut out at a part on the lens side third straight line L3 or the lens side fourth straight line L4.
Further, the length in the circumferential direction of the lens-side first claw portion 390a may be changed within a range that passes through the corresponding body-side first insertion / extraction portion 280a. The same applies to the lens side second claw portion 390b, the lens side third claw portion 390c, and the lens side fourth claw portion 390d.
Furthermore, the radial thickness of the cylindrical portion 312 can be changed as appropriate, and at least a part of the cylindrical portion 312 may protrude toward the inner diameter side of the cylindrical portion 312 of the present embodiment.

  The lens side claw portion 390 protrudes radially outward from the outer periphery of the cylindrical portion 312, and a portion where the lens side claw portion 390 exists and a space where the lens side claw portion 390 does not exist on the outer periphery of the cylindrical portion 312. There is a part.

In the following description, a space 380d between the lens side first claw portion 390a and the lens side fourth claw portion 390d on the outer periphery of the cylindrical portion 312 is referred to as a lens side first insertion / extraction portion 380a.
Similarly, a space 380b between the lens side first claw portion 390a and the lens side second claw portion 390b is replaced with a lens side second insertion / extraction portion 380b, a lens side second claw portion 390b, and a lens side third claw portion 390c. The space 380c between them is referred to as a lens side third insertion / extraction portion 380c, and the space 380d between the lens side third claw portion 390c and the lens side fourth claw portion 390d is referred to as a lens side fourth insertion / extraction portion 380d.
These four lens side first insertion / extraction portions 380a to 380d are collectively referred to as a lens side insertion / extraction portion 380.

The lengths in the circumferential direction of the lens side first insertion / extraction part 380a to the lens side fourth insertion / extraction part 380d are different from each other. Specifically, the lens side second insertion / extraction section 380b is the longest, the lens side first insertion / extraction section 380a is the second longest, the lens side fourth insertion / extraction section 380d is the third longest, and the lens side third insertion / extraction section 380c is Shortest.
An angle β6 formed by a straight line connecting one end of the lens-side second insertion / extraction part 380b and the optical axis O and a straight line connecting the other end of the lens-side second insertion / extraction part 380b and the optical axis O is about 50 degrees, 49 .5 degrees to 50.5 degrees.
An angle β5 formed by a straight line connecting one end of the lens-side first insertion / extraction part 380a and the optical axis O and a straight line connecting the other end of the lens-side first insertion / extraction part 380a and the optical axis O is about 45 degrees, and 44 .5 degrees to 45.5 degrees.

An angle β8 formed by a straight line connecting one end of the lens side fourth insertion / extraction part 380d and the optical axis O and a straight line connecting the other end of the lens side fourth insertion / extraction part 380b and the optical axis O is about 44.5 degrees. 44.0 degrees to 45.0 degrees.
An angle β7 formed by a straight line connecting one end of the lens side third insertion / extraction part 380c and the optical axis O and a straight line connecting the other end of the lens side third insertion / extraction part 380c and the optical axis O is about 44 degrees. It is between 43.5 degrees and 44.5 degrees.
Of course, the angles α5 to α8 of the four lens side first claw portions 390a to the fourth lens side claw portion 390d and the angles β5 to β8 of the four lens side first insertion / extraction portions 380a to the lens side fourth insertion / extraction portion 380d are set. The total value is 360 degrees.

The lens-side first insertion / extraction part 380a and the lens-side third insertion / extraction part 380c are located on the lens-side second straight line L2 and in the region that is substantially the object about the optical axis O. 380b and the lens-side fourth insertion / extraction portion 380d are respectively arranged in regions that are on the lens-side first straight line L1 and that are substantially targeted around the optical axis O.
The lens-side first straight line L1 and the lens-side second straight line L2 do not necessarily pass through the center positions along the circumferential direction of the lens-side first insertion / extraction part 380a to the lens-side fourth insertion / extraction part 380d.

  Inside the cylindrical portion 312, a lens side terminal holding portion 320 including a plurality of lens side terminals is provided. The lens side terminal holding part 320 has an arc shape corresponding to the shape of the annular lens side mount 310. The lens side terminal holding part 320 is preferably arranged in the upper part of the lens side mount 310 in parallel with the opening of the lens side mount 310, and is arranged in the center of the upper part as shown in FIGS. That is, it is preferable that the center of the lens side terminal holding part 320 in the circumferential direction is located on the lens side first straight line L1.

  A lens side first claw portion 390a is disposed at the upper left of the lens side terminal holding portion 320, and a lens side second insertion / extraction portion 380b is disposed at the upper right of the lens side terminal holding portion 320. Therefore, the angle formed by the straight line connecting one end of the lens side terminal holding part 320 and the optical axis O and the straight line connecting the other end of the lens side terminal holding part 320 and the optical axis O is the lens side first claw part 390a. Is smaller than the sum of the angle α5 and the angle β6 of the second lens-side insertion / extraction portion 380b.

  The lens side terminal holding part 320 has a plurality of lens side terminals as described above. A plurality of lens side terminals (referred to as a “lens side terminal group”) are arranged in an arc in the lens side terminal holding part 320 in a line inside the lens side mount 310. The lens side terminal groups are arranged such that the conductive contact surfaces are exposed in the + Z direction (FIG. 1).

All contact surfaces of the plurality of lens side terminals may be positioned in the + Z direction from the rear end in the optical axis O direction of the lens side claw portion 390, or −Z direction from the rear end in the optical axis O direction of the lens side claw portion 390. May be located.
In addition, some contact surfaces of the plurality of lens side terminals may be positioned in the + Z direction from the rear end of the lens side claw portion 390 in the optical axis O direction, and the remaining contact surfaces may be positioned on the optical axis of the lens side claw portion 390. It may be located in the −Z direction from the rear end in the O direction.

  The lens side mount 310 has a lock pin receiving portion 314. As shown in FIGS. 5 and 6, the lock pin receiving portion 314 is disposed at the upper left of the lens side fourth claw portion 390 d. That is, the lock pin receiving portion 314 corresponds to the portion corresponding to the outer peripheral side of the lens side first claw portion 390a and the outer peripheral side of the lens side fourth claw portion 390d of the lock pin sliding surface 309 of the lens side mount 310. It is arranged between the parts to be.

The lock pin receiving portion 314 is a groove in which the lock pin 214 of the camera body 2 is received when the interchangeable lens 3 is attached to the camera body 2. The groove is provided in a concave shape from the lock pin sliding surface 309 of the lens side mount 310 toward the −Z direction (FIG. 1).
In a state where the lock release button of the camera body 2 is not pressed, the −Z direction end (the front end on the subject side) of the lock pin 214 fits in the lock pin receiving portion 314 of the lens side mount 310. When the lock release button of the camera body 2 is pressed, the −Z direction end of the lock pin 214 is positioned in the + Z direction with respect to the lock pin sliding surface 309. Therefore, when the interchangeable lens 3 and the camera body 2 are rotated relative to each other while pressing the lock release button of the camera body 2, the lock pin 214 does not contact the lock pin sliding surface 309.

  When the interchangeable lens 3 is attached to the camera body 2, the plurality of body side terminals are in physical contact with the corresponding plurality of lens side terminals. By this contact, the plurality of body side terminals and the plurality of lens side terminals are electrically connected. That is, the plurality of body side terminals and the plurality of lens side terminals are electrically connected.

As shown in FIG. 7, a limiting pin 315 is disposed between the reference surface 311 of the lens side mount 310 and the lens side fourth claw portion 390 d in a direction protruding from the outer peripheral surface of the cylindrical portion 312. The limiting pin 315 is disposed on the rear end side (position close to the lens side third claw portion 390c) in the mounting direction 44 of the lens side fourth claw portion 390d. A part of the limiting pin 315 is disposed on the back side of the lens side fourth claw portion 390d when the lens side fourth claw portion 390d is viewed from behind the interchangeable lens 3.
In this embodiment, a screw member is used for the limit pin 315 and screwed to the cylindrical portion 312 from the outside in the radial direction. However, the shape and material of the limit pin 315 are not limited to this.

(How to attach the interchangeable lens 3 to the camera body 2)
Next, a method for mounting the interchangeable lens 3 on the camera body 2 will be described with reference to FIGS. 8 and 9 are views showing the positional relationship between the body side claw portion 290 of the camera body 2 and the lens side claw portion 390 of the interchangeable lens 3 so that the contact state between the claw portions can be understood. is there. 8 and 9 are views of the body-side mount 210 and the lens-side mount 310 as viewed from the subject side toward the image sensor 270 (as viewed in the + Z direction). The lens-side mount 310 is illustrated in FIG. 5. The left and right sides of FIG. 6 are reversed.

  When attaching the interchangeable lens 3 to the camera body 2, first, an index (not shown) attached to the outer peripheral surface of the interchangeable lens 3 and an index (not shown) attached to the exterior surface of the camera body 2 are aligned, The lens side claw portions 390 are inserted into the body side insertion / extraction portions 280 with the body side mount 210 and the lens side mount 310 facing each other. That is, as shown in FIG. 8, the lens-side first claw portion 390a is inserted into the body-side first insertion / extraction portion 280a, the lens-side second claw portion 390b is inserted into the body-side second insertion / extraction portion 280b, and the lens-side first insertion / extraction portion 280b is inserted. The three claw portions 390c are inserted into the body side third insertion / extraction portion 280c, and the lens side fourth claw portion 390d is inserted into the body side fourth insertion / extraction portion 280d. At this time, the body side first claw portion 290a is inserted into the lens side second insertion / extraction portion 380b, the body side second claw portion 290b is inserted into the lens side third insertion / extraction portion 380c, and the body side third claw portion 290c is inserted into the lens. The body side fourth claw portion 290d is inserted into the lens side first insertion / extraction portion 380a. The position of the interchangeable lens 3 with respect to the camera body 2 at this time is referred to as an insertion position.

  From the insertion position, the interchangeable lens 3 is rotated in the mounting direction 44 shown in FIG. The mounting direction 44 is a direction along a circumferential direction centering on the optical axis O in a plane substantially orthogonal to the optical axis O. As the interchangeable lens 3 rotates, the body-side first claw portion 290a and the leaf spring 213a enter the space between the lens-side first claw portion 390a and the reference surface 311.

That is, the lens side first claw portion 390a enters the image sensor 270 side (+ Z side) of the body side first claw portion 290a, and the lens side first claw portion 390a enters the image sensor 270 side (+ Z side) of the leaf spring 213a. Opposite to. In addition, the body-side first claw portion 290a and the leaf spring 213a enter the space between the lens-side first claw portion 390a and the reference surface 311. Similarly, the body-side second claw portion 290b and the leaf spring 213b enter the space between the lens-side second claw portion 390b and the reference surface 311, and between the lens-side third claw portion 390c and the reference surface 311. The body side third claw portion 290c and the leaf spring 213c enter the space, and the body side fourth claw portion 290d and the leaf spring 213d enter the space between the lens side fourth claw portion 390d and the reference surface 311. At this time, the lens side terminal group sequentially contacts the body side terminal group.
Although the interchangeable lens 3 is rotated in the mounting direction 44 with respect to the camera body 2, the camera body 2 may be rotated in the direction opposite to the mounting direction 44 with respect to the interchangeable lens 3.

  FIG. 9 is a diagram in which the interchangeable lens 3 is rotated by the first angle in the mounting direction 44 with respect to the camera body 2 from the insertion position of FIG. 8, and shows a state where the interchangeable lens 3 is completely mounted on the camera body 2. The position of the interchangeable lens 3 at this time is referred to as a mounting position. The first angle is about 40 degrees in the present embodiment, and is 38.5 degrees to 41.5 degrees.

  At the mounting position, the lock pin 214 of the camera body 2 is pushed in the −Z direction and enters the lock pin receiving portion 314 of the interchangeable lens 3. When the lock pin 214 enters the lock pin receiving portion 314, the interchangeable lens 3 restricts rotation for removing the camera body 2. That is, when the body side claw portions 290 and the lens side claw portions 390 reach the mounting positions, the relative positions of the body side mount 210 and the lens side mount 310 in the circumferential direction are determined.

Further, the lens side claw portion 390 is pushed toward the image sensor 270 side (+ Z direction) by the leaf spring 213, and the reference surface 311 of the lens side mount 310 contacts the reference surface 211 of the body side mount 210. When the lens side mount 310 is in surface contact with the body side mount 210 and is urged by the leaf spring 213, the interchangeable lens 3 and the camera body 2 are firmly attached.
At the mounting position, each of the plurality of lens side terminals is in contact with and electrically connected to each of the corresponding plurality of body side terminals.

  Further, the state from the state in which each lens side claw portion 390 in FIG. 8 is inserted into the corresponding body side insertion / extraction portion 280 at the insertion position to immediately before the attachment position in FIG. Since the lock pin 214 of the camera body 2 is pressed in the −Z direction, the end portion of the lock pin 214 in the −Z direction comes into contact with the lock pin sliding surface 309 of the lens side mount 310 in the mounting state.

  As the interchangeable lens 3 rotates, the −Z direction end of the lock pin 214 slides on the lock pin sliding surface 309 of the interchangeable lens 3. Therefore, a fixing screw for fixing the lens side mount 310 is not disposed in the first angle range opposite to the mounting direction 44 from the lock pin receiving portion 314 of the lock pin sliding surface 309. By not arranging the fixing screw in the first angle range in the reverse direction, the -Z direction end of the lock pin 214 does not hit the fixing screw when sliding on the lock pin sliding surface 309, so The interchangeable lens 3 can be attached and detached.

(How to remove the interchangeable lens 3 from the camera body 2)
When the user presses a lock release button (not shown) of the camera body at the mounting position, the lock pin 214 is retracted from the lock pin receiving portion 314 to the image sensor 270 side. Thereby, the restriction on the rotation of the interchangeable lens 3 with respect to the camera body 2 is released, and the lens side mount 310 can be rotated with respect to the body side mount 210. When the interchangeable lens 3 is rotated with respect to the camera body 2 in a direction (removal direction) opposite to the mounting direction 44 while pressing a lock release button (not shown), each lens side claw portion 390 becomes each body side claw portion 290. Is moved from the position facing the image side surface to the position of each body side insertion / extraction portion 280, and reaches the insertion position shown in FIG.

(Description of over-rotation state in the mounting direction)
Next, an over-rotation state in which the interchangeable lens 3 is rotated by the first angle or more in the mounting direction 44 with respect to the camera body 2 will be described with reference to FIG. FIG. 10 is a schematic diagram showing the positional relationship between the body-side fourth claw portion 290d of the camera body 2 and the lens-side fourth claw portion 390d of the interchangeable lens 3, and the upper part (a) of the alternate long and short dash line is the imaging element from the subject side. It is the figure seen toward the 270 side, The lower part (b) of a dashed-dotted line is the figure which looked at the lens mount mechanism from the side surface. When the interchangeable lens 3 is mounted on the camera body 2, if the user rotates the interchangeable lens 3 in the mounting direction 44 while pressing the lock release button, the lock pin 214 does not enter the lock pin receiving portion 314 at the mounting position. Therefore, the interchangeable lens 3 can be further rotated with respect to the camera body 2 from the mounting position shown in FIG. When the interchangeable lens 3 is further rotated with respect to the camera body 2 in the mounting direction 44 from the mounting position, the limit pin 315 comes into contact with the rear end of the mounting direction 44 of the body side fourth claw portion 290d so that the interchangeable lens 3 is Further rotation with respect to the camera body 2 is prevented.

(Description of over-rotation state in removal direction)
Next, an over-rotation state in which the interchangeable lens 3 is rotated with respect to the camera body 2 in the direction opposite to the mounting direction 44 (removal direction) from the insertion position will be described with reference to FIG. FIG. 11 is a side view of a part of the lens mount mechanism in an over-rotation state in the removal direction. Since the limit pin 315 is disposed at the rear end of the lens side fourth claw portion 390d in the mounting direction 44, if the user tries to reversely rotate the lens after inserting the interchangeable lens 3 into the camera body 2, the limit pin 315 is limited. The pin 315 contacts the tip of the body side third claw portion 290c in the mounting direction 44 to prevent the interchangeable lens 3 from further rotating in the removal direction with respect to the camera body 2.

Thus, the limit pin 315 prevents both over-rotation in the mounting direction 44 and over-rotation in the removal direction by contacting the circumferential end of the body side claw portion 290. Since the limit pin 315 prevents both over-rotation in the mounting direction 44 and over-rotation in the removal direction, the limit pin 315 includes two members, a member that prevents over-rotation in the mounting direction 44 and a member that prevents over-rotation in the removal direction. There is no need to prepare.
Further, since the limit pin 315 prevents over-rotation using the circumferential end of the body side claw 290, it is not necessary to separately provide a member that contacts the limit pin 315 during over-rotation.

(Explanation of incorrect insertion)
Next, an erroneous insertion state in which the user tries to insert the interchangeable lens 3 into the camera body 2 at an incorrect position without matching the index of the interchangeable lens 3 and the index of the camera body 2 will be described. Since the lens side claw portion 390 does not pass through the body side insertion / extraction portion 280 in the erroneous insertion state, the positional relationship between the lens side claw portion 390 and the body side claw portion 290 on the optical axis O is the positional relationship at the insertion position. Different. 12 and 13 are schematic views showing the positional relationship between the body side claw portion 290 of the camera body 2 and the lens side claw portion 390 of the interchangeable lens 3 so that the contact state between the claw portions can be understood. It is. 12 and 13 are views of the body-side mount 210 and the lens-side mount 310 as viewed from the subject side toward the image sensor 270 (viewed in the + Z direction). 5. The left and right sides of FIG. 6 are reversed. As an example of the erroneous insertion state, FIG. 12 shows a state in which the index of the interchangeable lens 3 and the index of the camera body 2 are deviated 15 degrees in the removal direction from the insertion position. FIGS. 13A to 13C show a state where the index of the interchangeable lens 3 and the index of the camera body 2 are shifted from the insertion position by 90 intervals.

  FIG. 12 shows a state shifted from the insertion position by 15 degrees in the removal direction (first erroneous insertion state). As shown by hatching in FIG. 12, the lens side claw portion 390 contacts the body side claw portion 290 at the portions indicated by the four symbols γ1 to γ4, so that the lens side claw portion 390 is not inserted into the body side insertion / extraction portion 280. That is, in the first erroneous insertion state, the lens-side claw portion 390 and the body-side claw portion 290 are in contact with each other at four locations, thereby preventing erroneous insertion.

  FIG. 13A is a diagram illustrating a state (second erroneous insertion state) in which the index of the interchangeable lens 3 and the index of the camera body 2 are shifted from the insertion position by approximately 90 degrees in the removal direction. FIG. 13B is a diagram illustrating a third erroneous insertion state in which the index of the interchangeable lens 3 and the index of the camera body 2 are shifted by approximately 180 degrees from the insertion position in the removal direction. FIG. 13C is a diagram illustrating a fourth erroneous insertion state in which the index of the interchangeable lens 3 and the index of the camera body 2 are shifted from the insertion position by approximately 270 degrees in the removal direction.

  As shown in FIG. 13A, in the case of the second erroneous insertion state, the lens side third claw portion 390c hits the body side first claw portion 290a with the portion indicated by the symbol γ5 and the body side second claw portion 290b. The portion indicated by γ7 hits and cannot be inserted into the body-side second insertion / extraction portion 280b. Further, the lens side first claw portion 390a cannot be inserted into the body side fourth insertion / extraction portion 280d because the portion indicated by the symbol γ6 hits the body side fourth claw portion 290d. Thus, in the second erroneous insertion state, the lens side claw portion 390 contacts the body side claw portion 290 at three locations to prevent erroneous insertion.

  As shown in FIG. 13B, in the third erroneous insertion state, the lens side fourth claw portion 390d hits the body side first claw portion 290a with the portion indicated by the symbol γ8, and the body side second insertion / extraction is performed. It cannot be inserted into the portion 280b. Further, the lens side first claw portion 390a cannot be inserted into the body side first insertion / extraction portion 280a because the portion indicated by the symbol γ9 hits the body side third claw portion 290c. Thus, in the third erroneous insertion state, the lens side claw portion 390 contacts the body side claw portion 290 at two locations to prevent erroneous insertion.

  As shown in FIG. 13C, in the fourth erroneous insertion state, the lens side first claw portion 390a hits the body side first claw portion 290a with a portion indicated by reference numeral γ10 and the body side second claw portion 290b. The portion indicated by γ11 hits and cannot be inserted into the body-side second insertion / extraction portion 280b. Further, the lens side third claw portion 390c cannot be inserted into the body side fourth insertion / extraction portion 280d because the portion indicated by the symbol γ12 hits the body side third claw portion 290c. Thus, in the fourth erroneous insertion state, the lens side claw portion 390 contacts the body side claw portion 290 at three locations to prevent erroneous insertion.

  As described above, the lens-side claw portion 390 comes into contact with the body-side claw portion 290 in at least two places in an erroneous insertion state other than the insertion position, so that the lens-side claw portion 390 is in contact with the body-side insertion / extraction portion at a position other than the insertion position. Insertion into 280 is prohibited. Therefore, even if the interchangeable lens 3 is to be attached to the camera body 2 at the erroneous insertion position, the erroneous insertion can be reliably prevented by the contact between the claws at at least two locations.

Further, in the first misinsertion state to the fourth misinsertion state, one of the two or more contact locations is located above the image sensor 270. That is, at the erroneous insertion position, one of the lens side first claw portion 390a to the lens side third claw portion 390c contacts the end portion on the distal end side in the mounting direction 44 of the body side first claw portion 290a. The claw portion 390a to the lens side third claw portion 390c are prevented from being inserted into the body side second insertion / extraction portion 280b. As described above, the body-side terminal holding portion 220 is disposed in the opening 212 of the body-side mount 210 and above the image sensor 270. A body-side first claw portion 290a is provided at an upper portion of the body-side terminal holding portion 220, and the body-side first claw portion 290a has the longest circumferential length among the four body-side claw portions 290. The body side terminal holding part 220 has a body side second insertion / extraction part 280b above the body side terminal holding part 220, and the body side second insertion / extraction part 280b is the shortest of the four body side insertion / extraction parts 280. Therefore, the lens-side second claw portion 390b is only inserted into the body-side second insertion / extraction portion 280b at the normal insertion position, and the other lens-side first claw portions 390a to 390b are inserted into the body-side second insertion / extraction portion 280b. The lens side third claw portion 390c is not erroneously inserted. Further, the lens-side first claw portion 390a to the lens-side third claw portion 390c do not enter the body-side second insertion / extraction portion 280b by being inclined (inclined in a direction intersecting the optical axis O direction). This prevents the lens side claws 390a to 390c from hitting the body side terminal holding part 220 and damaging the body side terminals in an erroneous insertion state. Further, the body side first claw portion 290a prevents any erroneous insertion by hitting any of the lens side claw portions 390 in an erroneous insertion state, but the body side first claw portion 290a has four lens side claw portions 290. Among them, since the length in the circumferential direction is the longest and the resistance is high, the possibility that the body-side first claw portion 290a is damaged at the time of erroneous insertion can be reduced. Further, in the second to fourth erroneous insertion states, at least one of the contact portions is at a position facing the body side terminal holding part 220 with the optical axis O interposed therebetween. That is, one of the contact points is in the vicinity of the body side terminal holding part 220 and above the body-side second straight line B2 passing through the optical axis O, and one of the contact points is the body side passing through the optical axis O. It is below the second straight line B2. Therefore, in the second to fourth erroneous insertion states, there are two or three contact points, but since the contact is made above and below the body-side second straight line B2 passing through the optical axis O, the possibility of erroneous insertion is reduced. can do.
In the first to fourth erroneous insertion states, one of the two or more contact points is located on the outer peripheral side of the lens side terminal holding part 320. That is, at the erroneous insertion position, any one of the body side first to fourth claw portions 290a to 290d abuts on the end portion on the distal end side in the mounting direction 44 of the lens side first claw portion 390a. Therefore, the other body side second to fourth claw portions 290b to 290d are prevented from being erroneously inserted into the lens side second insertion / extraction portion 380b. As described above, the lens-side terminal holding portion 320 has an end portion on the distal end side in the mounting direction 44 of the body-side first claw portion 290a. This prevents the lens-side first claw portion 290a from passing through the body-side insertion / extraction portions 280b to 280d other than the body-side first insertion / extraction portion 280a, and hitting the lens-side terminal holding portion 320 to damage the lens-side terminal. doing. In addition, the lens side first claw portion 390a hits one of the body side claw portions 290 in an erroneous insertion state to prevent erroneous insertion, but the lens side first claw portion 390a is out of the four lens side claw portions 390. Secondly, since the length in the circumferential direction is long and the resistance is relatively high, the possibility that the lens side first claw portion 390a is damaged at the time of erroneous insertion can be reduced.

Here, as shown in FIG. 8, the lens-side second claw portion 390b passes through the body-side second insertion / extraction portion 280b and is disposed at the insertion position, and faces the body-side second claw portion 290b at the mounting position. The angle α6 (FIG. 6) of the lens side second claw portion 390b is smaller than the angle β2 (FIG. 3) of the body side second insertion / extraction portion 280b. The angle β2 of the body side second insertion / extraction part 280b is smaller than the first angle from the insertion position to the mounting position. Therefore, by making the lens-side second claw portion 390b smaller than the first angle, the body-side second insertion / extraction portion 280b is made smaller, and in the wrong insertion state, other lens-side claw portions other than the lens-side second claw portion 390b. It is possible to prevent 390 from passing. In particular, in the second mis-insertion state to the fourth mis-insertion state where the lens side claw portion 390 and the body side claw portion 290 come into contact with two or three places, the lens side claw portion 390 is in a position other than the lens side second claw portion 390b It is possible to prevent the other lens side claw portions 390a, 390c, and 390d from passing through the body side second insertion / extraction portion 280b. Since the body-side terminal holding portion 220 is disposed on the inner diameter side of the body-side second insertion / extraction portion 290b, the other lens-side claw portions 390a, 390c, and 309d are prevented from passing therethrough, It is also possible to prevent the lens side claw portion 390 and the cylindrical portion 312 from being damaged by the body side terminal holding portion 220.
The angle α6 of the lens side second claw portion 390b may be smaller than the angles α5, α7, α8 of the lens side first claw portion 390a, the lens side third claw portion 390c, and the lens side fourth claw portion 390d. The angle β2 of the body side second insertion / extraction portion 280b may be smaller than the angles α5, α7, α8 of the lens side first claw portion 390a, the lens side third claw portion 390c, and the lens side fourth claw portion 390d.

  According to the above-described embodiment, the interchangeable lens 3 can be attached to the camera body 2 in a properly usable state. In particular, when the camera body 2 and the interchangeable lens 3 are mounted, the four lens side claws 390 are pressed in the + Z direction from the leaf springs 213 of the four body side claws 290, so the interchangeable lens 3 and the camera body 2 Even when an impact is applied to any one of the four, there are four projecting portions (lens side claw portion 390 and body side claw portion 290), so that the impact resistance is high.

  In addition, when the interchangeable lens 3 is attached to the camera body 2, communication, power supply, and control can be performed between the camera body 2 and the interchangeable lens 3 through the respective terminals of the camera body 2 and the interchangeable lens 3. The system 1 can be used properly.

  The four protrusions of the interchangeable lens 3 are arranged on a straight line that intersects the optical axis O at approximately 45 degrees with respect to a straight line connecting the center of the contact holding part and the optical axis O, and approximately 90 around the optical axis O. The four leaf springs 213 arranged at intervals of degrees are brought into contact with the four projecting portions of the camera body 2. Thereby, even when the camera system 1 is held in the horizontal position or in the vertical position, the impact resistance is high. In particular, even when any one of the interchangeable lens 3 and the camera body 2 is subjected to an impact in the vertical direction, 2 on the right side and the left side of the straight line (B1, L1) connecting the center of the contact holding part and the optical axis O, respectively. Since the protrusions are arranged one by one, the impact in the vertical direction can be received by two or more protrusions.

  The body side second claw portion 290b and the body side fourth claw portion 290d are arranged on the body side third straight line B3, and the body side first claw portion 290a and the body side third claw portion are arranged on the body side fourth straight line B4. 290c. Here, the angle α4 of the body side fourth claw portion 290d is the third largest among the four body side claw portions 290, and the angle α2 of the body side second claw portion 290b is the same among the four body side claw portions 290. The smallest angle (4th largest). Further, the angle α1 of the body side first claw portion 290a is the largest among the four body side claw portions 290, and the angle α3 of the body side third claw portion 290c is the second angle of the four body side claw portions. Is big.

  Therefore, when one of the interchangeable lens 3 and the camera body 2 receives an impact in the vertical direction, a combination of the upper two protrusions (the body side first claw portion 290a and the body side second claw portion 290b) The force applied to the combination of the two lower protrusions (the body side fourth claw portion 290d and the body side third claw portion 290c) becomes substantially equal. Even when a shock is applied in the left-right direction, a combination of the left two protrusions (the body side third claw portion 290c and the body side second claw portion 290b) and the right two protrusions (the body side first protrusion) The force applied to the combination of the 1 claw portion 290a and the body side fourth claw portion 290d) is substantially equal.

  The lens side first claw portion 390a and the lens side third claw portion 390c are arranged on the lens side third straight line L3, and the lens side second claw portion 390b and the lens side fourth claw portion are arranged on the lens side fourth straight line L4. 390d. Here, the angle α8 of the lens-side fourth claw portion 390d is the third largest among the four lens-side claw portions 390, and the angle α6 of the lens-side second claw portion 390b is the value of the four lens-side claw portions 390. The smallest angle (4th largest). In addition, the angle α5 of the lens-side first claw 390a has the second largest angle among the four lens-side claws, and the angle α7 of the lens-side third claw 390c has the largest angle among the four lens-side claws. large.

  Therefore, when one of the interchangeable lens 3 and the camera body 2 receives an impact in the vertical direction, the combination of the upper two protrusions (the lens side first claw portion 390a and the lens side second claw portion 390b) The force applied to the combination of the two lower protrusions (the lens side fourth claw portion 390d and the lens side third claw portion 390c) becomes substantially equal. Even when a shock is applied in the left-right direction, a combination of the left two protrusions (the lens side first claw 390a and the lens side fourth claw 390d) and the right two protrusions (the lens side first protrusion) The force applied to the combination of the three claw portion 390c and the lens side second claw portion 390b) becomes substantially equal.

  In the present embodiment, the lens side third claw portion 390c has a larger angle between the lens side first claw portion 390a and the lens side third claw portion 390c arranged on the lens side third straight line L3. The lens side fourth claw portion 390d has a larger angle between the lens side second claw portion 390b and the lens side fourth claw portion 390d arranged on the side fourth straight line L4. In other words, the two lens side claws 390 facing each other across the optical axis O are larger than the two lens side claws 390 below the lens side second straight line L2 (horizontal direction). Therefore, in the state where the camera system is held in the horizontal position, the impact received by the interchangeable lens 3 from below is large in the area of the two large lens side claw portions 390 below the lens side second straight line L2. Can receive. In addition, when the interchangeable lens 3 receives an impact from below with the camera system held in the horizontal position, the lens side claw portion 390 below the lens side second straight line L2 approaches the body side claw portion 290. Impact in the direction (-Z direction). Here, the leaf spring 213 presses the lens side claw 390 in a direction away from the body side claw 290 (+ Z direction). Therefore, even when the interchangeable lens 3 is impacted from below while the camera system is held in the horizontal position, the lens-side claw portion 390 below the lens-side second straight line L2 has a large area, and Since the impact can be absorbed even by the urging force of the leaf springs 213 of the opposing body side claws 290, the impact resistance is high.

  In a state where the interchangeable lens 3 is mounted on the camera body 2, the lens side terminal holding unit 320 is disposed on the upper part of the image sensor 270. Sunlight incident on the interchangeable lens 3 in a state where the camera system 1 is held in the horizontal position is incident on the lower side on the exit side of the interchangeable lens 3, so that a ghost is likely to occur on the lower side of the image sensor 270. In the embodiment, since the lens side terminal holding part 320 is arranged on the upper side rather than the lower side of the image sensor 270, ghost can be suppressed.

The four leaf springs 213 are arranged around the optical axis O at intervals of about 90 degrees. Therefore, at least two leaf springs 213 of the four leaf springs 213 are in contact with the two lens side claws 390 across the optical axis O, and the two lens side claws 390 are pressed in the + Z direction. In the present embodiment, the interchangeable lens 3 is provided with the four lens side claws 390, but even if one lens side claw 390 of the four lens side claws 390 of the interchangeable lens 3 is damaged. Since at least two lens-side claws 390 are disposed at positions facing each other with the optical axis O interposed therebetween, they are pressed by two leaf springs 213 disposed at positions facing each other across the optical axis O. Therefore, the camera system 1 can be provided in which the interchangeable lens 3 can be attached to the camera body 2 even when the number of the claw portions 390 of the interchangeable lens 3 is damaged and becomes insufficient. .
Further, since the leaf spring 213 is on the straight line B5 (FIG. 4), the lens side terminal near the straight line B5 can be strongly pressed against the body side terminal.

The following modifications are possible, and one or a plurality of modifications can be combined with the above-described embodiment.
(Modification)

  One of the four lens side claws 390 may be removed, and three lens side claws may be provided. Even in the case of three lens side claws, the leaf springs 213 of the camera body 2 are arranged at intervals of 90 degrees around the optical axis O, so that the lens side claws can be pressed from at least three leaf springs 213 for use. It can be installed in any state.

  Two lens-side claw portions 390 may be configured to have two lens-side claw portions that are opposed to each other with the optical axis O interposed therebetween by removing two of the four lens-side claw portions 390 that are opposed to each other with the optical axis O interposed therebetween. Even the two lens-side claws are opposed to each other with the optical axis O interposed therebetween, and the leaf springs of the camera body 2 are arranged at intervals of 90 degrees around the optical axis, so that at least the optical axis O is interposed therebetween. The lens side claw portion is pressed from the leaf spring 213 to be mounted and can be used in a usable state. In addition, when it is set as the structure provided with the two lens side claw parts which oppose on both sides of the optical axis O, one of the two lens side claw parts is arrange | positioned in the position near the center of the lens side terminal holding part 320. FIG. Is preferred. It is possible to use the camera system 1 properly by placing the lens claw portion at a position close to the center of the lens side terminal holding portion 320 and bringing it into contact with the leaf spring 213 so that the lens side terminal and the body side terminal are brought into contact with each other. it can.

  The material of the lens side mount 310 is not particularly limited, and may be metal or resin. In addition, at least a part of the end of the lens side mount 310 (the outer peripheral side end of the lens side claw 390, the circumferential end of the lens side claw 390, the end of the cylindrical portion 312 in the optical axis O direction) is inclined at least partially. May be formed. The end of the lens side mount 310 may not be inclined and may have a step in part.

There is no limitation in particular in the shape of the lens side terminal holding part 320, and it can change suitably. In particular, by inclining the circumferential end of the lens-side terminal holding part 320, the contact with the body-side terminal holding part 220 when rotating from the insertion position to the mounting position can be performed smoothly.
In addition, the lens side terminal holding unit 320 includes a plurality of lens side terminals arranged in an arc shape, but the position of the lens side terminal is within a range where the interchangeable lens 3 is in contact with the body side terminal when the interchangeable lens 3 is attached to the camera body 2. May be shifted.

  The center position and length of the lens side claw portion 390 in the circumferential direction can be appropriately changed within a range in which the lens side claw portion 390 is pressed from the leaf spring 213 at the mounting position. The center position in the circumferential direction of the lens side claw 390 and the center position in the circumferential direction of the biased part may be arranged at different positions. That is, the position where the lens side claw 390 is pressed from the center position in the circumferential direction of the leaf spring 213 may be a position different from the center position in the circumferential direction of the lens side claw 390. Similarly, the center position in the circumferential direction of the lens side claw portion 390 and the center position in the circumferential direction of the body side claw portion 290 may not coincide with each other in the mounting position. Further, the length in the circumferential direction of the lens-side claw portion 390 and the corresponding length in the circumferential direction of the body-side claw portion 290 may not coincide with each other.

  In the present embodiment, the interchangeable lens 3 of the camera system 1 is described as an example as an accessory, but the accessory is not limited to the interchangeable lens 3. For example, a teleconverter, a wide converter, a close-up ring, or the like that is mounted between the camera body 2 and the interchangeable lens 3 and changes the focal length of the interchangeable lens 3 may be used. Or it is applicable also to the mount adapter etc. which can mount | wear with the accessory containing the interchangeable lens 3 of another mount specification in the mount specification of the camera body 2 mentioned above. That is, any accessory can be used as long as it is attached to the mount of the camera body 2 and used. In this case, the lens side claw portion, the lens side terminal, and the like correspond to the accessory side protruding portion, the accessory side terminal, and the like of each accessory.

  In the above-described embodiment, the camera body 2 is an accessory that can be attached to and detached from. However, the camera body 2 is a mount adapter that allows the above-described mount standard interchangeable lens 3 to be mounted on a camera body different from the above-described mount standard. There may be a configuration in which the above-described accessory can be attached to the mount adapter.

  Although various embodiments and modifications have been described above, the present invention is not limited to these contents. Other embodiments conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Camera system, 2 ... Camera body, 3 ... Interchangeable lens, 44 ... Mounting direction, 210 ... Body side mount, 211 ... Reference plane, 212 ... Opening, 213 ... Leaf spring, 220 ... Body side terminal holding part, 270 ... Image sensor 290 ... Body side claw part, 309 ... Lock pin sliding surface, 310 ... Lens side mount, 311 ... Reference plane, 312 ... Cylindrical part, 320 ... Lens side terminal holding part, 360 ... Imaging optical system, 390 ... lens side claw part, B1 to B4 ... body side first straight line to fourth straight line, L1 to L4 ... lens side first straight line to fourth straight line, B5 ... straight line, O ... optical axis

Claims (1)

A rectangular image having an upper side and a lower side and a right side and a left side when the camera body is held in a horizontal position, and an object in which subject light is incident about the optical axis, and an arc shape above the upper side of the image sensor A body-side terminal group composed of a plurality of body-side terminals disposed on the body, an annular body-side mount centered on the optical axis disposed outside the imaging element and the body-side terminal group, and the body side A first body side projecting portion projecting from the mount toward the inner diameter direction, a second body side projecting portion projecting from the body side mount toward the inner diameter direction, and a first body side projecting portion projecting from the body side mount toward the inner diameter direction. 3 body side protrusions, and a fourth body side protrusion that protrudes in the inner diameter direction from the body side mount, and passes through the center in the arc direction of the body side terminal group and the optical axis. The first body side projecting portion, the second body side projecting portion, and the four regions divided by the de side first straight line, the body side first straight line, and the body side second straight line orthogonal to the optical axis It is an accessory that can be attached to and detached from the camera body in which the third body side protrusion and the fourth body side protrusion are respectively disposed,
An accessory-side mount that is annular around the optical axis and contacts the body-side mount;
A cylindrical portion extending in the optical axis direction from the inner peripheral edge of the accessory side mount;
An accessory-side terminal group comprising a plurality of accessory-side terminals that are arranged inside the cylindrical portion and come into contact with the body-side terminals when mounted on the camera body;
A first accessory-side protruding portion that protrudes from the cylindrical portion toward the outer peripheral direction of the accessory-side mount and extends in a circumferential direction around the optical axis;
A second accessory-side protruding portion that protrudes from the cylindrical portion toward the outer peripheral direction of the accessory-side mount and extends in a circumferential direction around the optical axis;
A third accessory-side protruding portion that protrudes from the cylindrical portion toward the outer peripheral direction of the accessory-side mount and extends in a circumferential direction around the optical axis;
A fourth accessory-side protruding portion that protrudes from the cylindrical portion toward the outer peripheral direction of the accessory-side mount and extends in a circumferential direction around the optical axis;
With
The first accessory side protrusion and the third accessory side protrusion on the accessory side first straight line that passes through the center of the accessory side terminal group and the optical axis and the accessory side third straight line that intersects the optical axis at approximately 45 degrees. And the second accessory side protruding portion and the fourth accessory side protruding portion are arranged on the accessory side fourth straight line orthogonal to the accessory side third straight line and the optical axis.

Images