JP2020013098A - interchangeable lens - Google Patents

Abstract

To mount an accessory to a camera body in an appropriately usable state.SOLUTION: An interchangeable lens attachable/detachable to and from a camera body equipped with a body-side mount, a plurality of body-side protrusions respectively protruding in the inner diametrical direction from the body-side mount and four elastic members respectively arranged on the image side of the plurality of body-side protrusions, comprises: a lens-side mount; a fixing member to which the lens-side mount is fixed; a cylindrical part extending in the direction of an optical axis from an inner peripheral edge of the lens-side mount; and a plurality of lens-side protrusions protruding in the outer peripheral direction from the cylindrical part and extending in the circumferential direction of the cylindrical part. The plurality of lens-side protrusions include four counter parts that face the four elastic members when the interchangeable lens is mounted to the camera body, and the lens-side mount is fixed to the fixing member with at least four screws 513, each of the four screws being arranged on the outer peripheral side of the four counter parts in one circumferential direction of the four counter parts.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an interchangeable lens.

  An accessory detachable from a camera body is known (for example, Patent Document 1). Conventionally, it has been necessary to mount an accessory on a camera body in a state where it can be used properly.

JP-A-8-43910

  An interchangeable lens according to a first aspect of the present invention includes an imaging element on which subject light is incident, a body-side terminal group arranged in an arc outside the imaging element, and an exterior element disposed outside the body-side terminal group. An annular body-side mount, a plurality of body-side protrusions each protruding in the radial direction from the body-side mount, and four elastic members respectively arranged on the image side of the plurality of body-side protrusions; An interchangeable lens that can be attached to and detached from the camera body, the lens-side mount being in contact with the body-side mount, and the lens-side mount being fixed in a direction orthogonal to the optical axis of the subject light. A fixing member, a cylindrical portion extending in the optical axis direction from an inner peripheral edge of the lens-side mount, and a body-side terminal disposed inside the cylindrical portion and mounted on the camera body. And a plurality of lens-side protrusions protruding from the cylindrical portion toward the outer peripheral direction and extending in a circumferential direction of the cylindrical portion, wherein the plurality of lens-side protrusions are: When the interchangeable lens is mounted on the camera body, the camera body includes four opposing portions opposing the four elastic members, and the lens-side mount is fixed to the fixing member with at least four screws, The four screws are arranged on the outer peripheral side of the four opposing portions and on one of the four opposing portions in the circumferential direction.

FIG. 1 is a diagram schematically illustrating a configuration of a camera system. FIG. 1 is a diagram schematically illustrating a configuration of a camera system. FIG. 3 is a front view of a mount surface of the camera body as viewed from a subject side. FIG. 3 is a front view of a mount surface of the camera body as viewed from a subject side. FIG. 5 is a view of the mount of the camera body from which a body side mount is removed, as viewed from a subject side. It is a figure which shows typically the rear mount of the teleconverter seen from the image side. It is a figure which shows typically the rear mount of the teleconverter seen from the image side. It is a perspective view of a rear side mounting surface. It is a figure which shows typically the front side mount of the teleconverter seen from the object side. It is a figure which shows typically the front side mount of the teleconverter seen from the object side. It is the schematic diagram which looked at the corresponding mount of the corresponding lens from the image side. It is the schematic diagram which looked at the corresponding mount of the corresponding lens from the image side. FIG. 4 is a front view of a body-side claw portion and a lens-side claw portion at an insertion position as viewed from a subject side. It is the front view of the body side nail | claw part and the lens side nail | claw part in the mounting position seen from the object side. It is the front view and side view of the body side nail | claw part and the lens side nail | claw part in the over rotation state of a mounting direction seen from the object side. FIG. 5 is a side view of the body-side claw and the lens-side claw in an over-rotation state in a removing direction as viewed from a subject side. It is the front view of the body side nail | claw part and the back side nail | claw part in the 1st incorrect insertion state seen from the object side. It is the front view of the body side nail | claw part and back side nail | claw part in the 2nd erroneous insertion state seen from the object side. It is the front view of the body side nail | claw part and back side nail | claw part in the 3rd erroneous insertion state seen from the object side. It is the front view of the body side nail | claw part and back nail | claw part in the 4th erroneous insertion state seen from the object side. FIG. 4 is a front view of a front claw portion and a lens claw portion as viewed from an image side. FIG. 4 is a front view of a front claw portion and a lens claw portion as viewed from an image side. FIG. 9 is a diagram showing a contact portion between a front claw or a projection and a lens claw in an erroneous insertion state as viewed from an image side. FIG. 9 is a diagram showing a contact portion between a front claw or a projection and a lens claw in an erroneous insertion state as viewed from an image side. FIG. 9 is a diagram showing a contact portion between a front claw or a projection and a lens claw in an erroneous insertion state as viewed from an image side. FIG. 9 is a diagram showing a contact portion between a front claw or a projection and a lens claw in an erroneous insertion state as viewed from an image side. FIG. 9 is a diagram showing a contact portion between a front claw or a projection and a lens claw in an erroneous insertion state as viewed from an image side. FIG. 9 is a schematic diagram illustrating a corresponding mount of Modification Example 1. FIG. 14 is a schematic diagram for explaining a corresponding mount of Modification Example 2. FIG. 14 is a schematic diagram illustrating a corresponding mount of Modification Example 3.

(Camera system 1)
1 and 2 are diagrams schematically illustrating the configuration of a camera system 1 according to an embodiment of the present invention. The camera system 1 includes a camera body 2, a teleconverter 3 detachable from the camera body 2, a corresponding lens 5 detachable from the camera body 2 and the teleconverter 3, and a teleconverter detachable from the camera body 2. 3 includes a non-compatible lens 6 that cannot be mounted.

  As shown in FIG. 1, a corresponding lens 5 is detachable from the camera body 2 via a teleconverter 3. FIG. 1A shows an example in which the corresponding lens 5 is attached to the camera body 2, and FIG. 1B shows an example in which the teleconverter 3 is interposed between the corresponding lens 5 and the camera body 2. The corresponding lens 5 is attached to the camera body 2 by the so-called bayonet connection of the corresponding mount 510 of the corresponding lens 5 to the body-side mount 210 of the camera body 2. The teleconverter 3 is mounted on the camera body 2 by the so-called bayonet connection of the rear mount 310 of the teleconverter 3 to the body-side mount 210 of the camera body 2. The corresponding lens 5 is mounted on the teleconverter 3 by the so-called bayonet coupling of the corresponding mount 510 of the corresponding lens 5 to the front mount 410 of the teleconverter 3.

  As shown in FIG. 2A, a non-compatible lens 6 is detachable from the camera body 2. The non-compliant lens 6 is mounted on the camera body 2 by the so-called bayonet connection of the non-compliant mount 610 of the non-compliant lens 6 to the body-side mount 210 of the camera body 2. The body-side mount 210 and the front-side mount 410 have different shapes, and the non-compliant mount 610 and the corresponding mount 510 also have different shapes. Therefore, the compatible mount 510 can be attached to and detached from both the body-side mount 210 and the front-side mount 410, and the non-compliant mount 610 can be attached to and detached from the body-side mount 210 and cannot be attached to the front-side mount 410.

  Here, if the non-compliant lens 6 is to be mounted on the teleconverter 3, the lens closest to the subject included in the non-compliant lens 6 moves in the optical axis O direction as shown in FIG. As a result, there is an interchangeable lens that hits the lens closest to the object side of the teleconverter 3. If a part of the interchangeable lens collides with a part of the teleconverter 3 other than the lens closest to the subject, it is preferable that the interchangeable lens be the non-compatible lens 6. It is not necessary that a part of the non-compliant lens 6 collides with the teleconverter 3, and an interchangeable lens that does not need to be mounted on the teleconverter 3 may be the non-compliant lens 6.

(Camera body 2)
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 supply unit 260, and an image sensor 270. The body-side mount 210 and the body-side terminal holding section 220 will be described later in detail.

  The body-side CPU 230 includes a microcomputer and its peripheral circuits. The body-side CPU 230 performs various controls of the camera body 2, the teleconverter 3, the compatible lens 5, and the non-compatible lens 6. The body-side communication unit 240 performs predetermined data communication with the teleconverter 3, the compatible lens 5, and the non-compatible lens 6. The body-side communication unit 240 is connected to a plurality of body-side terminals (described later) provided in 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. A predetermined control program executed by the body-side CPU 230 is stored in the body-side storage unit 250 in advance. The body-side CPU 230 performs each control by reading the control program from the body-side storage unit 250 and executing the program.

The power supply unit 260 has a power supply, and supplies power to the camera body 2, the teleconverter 3, the compatible lens 5, and the non-compatible lens 6. The power supply 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 a CMOS. The imaging element 270 is connected to the body-side CPU 230, and captures an image of a subject and outputs an imaging signal. Description of the processing of the output imaging signal is omitted.

(Teleconverter 3)
The teleconverter 3 includes a rear mount 310, a rear terminal holding unit 320, a front mount 410, a front terminal holding unit 420, a telecon control / communication unit 330, a telecon storage unit 340, a switch 350, a telecon power supply circuit 360, It has a lens 370. The rear mount 310, the rear terminal holder 320, the front mount 410, and the front terminal holder 420 will be described later in detail.

The tele-control-side control / communication section 330 is composed of a microcomputer and its peripheral circuits. The teleconverter-side control / communication unit 330 performs various controls of the teleconverter 3, such as opening and closing control of the switch 350. The teleconverter-side control / communication unit 330 performs predetermined data communication between the camera body 2 and the corresponding lens 5. The teleconverter-side control / communication unit 330 is connected to a plurality of body-side terminals (described later) provided on the rear terminal holding unit 320.
The teleconverter-side control / communication unit 330 executes a control program stored in the teleconverter-side storage unit 340 to control opening and closing of the switch 350. When the switch 350 is closed, the power supplied from the camera body 2 to the teleconverter-side power supply circuit 360 is supplied to the corresponding lens 5, and when the switch 350 is opened, the supply of power to the corresponding lens 5 is cut off. The teleconverter-side control / communication unit 330 performs a predetermined communication with the body-side communication unit 240.

  Data recording and reading of the teleconverter-side storage unit 340 are controlled by the teleconverter-side control / communication unit 330. The teleconverter-side storage unit 340 can store data (model name, magnification, etc.) of the teleconverter 3 in addition to storing a control program executed by the teleconverter-side control / communication unit 330.

  The lens 370 is a teleconverter lens that increases the focal length of the corresponding lens 5. In a state where the teleconverter 3 is mounted on the corresponding lens 5, the focal length of the corresponding lens 5 becomes 1.4 times as compared with a state where the teleconverter 3 is not mounted. In the present embodiment, the magnification of the teleconverter 3 is 1.4 times, but this is not a limitation.

(Corresponding lens 5)
The corresponding lens 5 includes a corresponding mount 510, a lens-side terminal holding unit 520, a lens-side CPU 530, a lens-side communication unit 540, a lens-side storage unit 550, an imaging optical system 560, and a driving unit 570. The corresponding mount 510 and the lens-side terminal holding section 520 will be described later in detail.

  The lens-side CPU 530 includes a microcomputer and its peripheral circuits. The lens-side communication unit 540 performs predetermined data communication with the camera body 2 or with the camera body 2 via the teleconverter 3. The lens side communication unit 540 is connected to a lens side terminal (described later) provided in the lens side terminal holding unit 520 and the lens side CPU 530. The lens-side storage unit 550 is a nonvolatile storage medium. The lens-side storage unit 550 is connected to the lens-side CPU 530. A predetermined control program executed by the lens-side CPU 530 is stored in the lens-side storage unit 550 in advance. The lens-side CPU 530 controls the corresponding lens 5 by reading a control program from the lens-side storage unit 550 and executing the program.

  The imaging optical system 560 forms a subject image on the imaging surface of the imaging element 270. The optical axis O of the imaging optical system 560 substantially coincides with the centers of the corresponding mount 510, the front mount 410, the rear mount 310, the body mount 210, and the image sensor 270. The imaging optical system 560 has a plurality of lenses and includes a focusing lens 562. The focusing lens 562 is a lens that adjusts an image forming position of a subject image. The drive unit 570 is connected to the lens-side CPU 530, and has an actuator and the like (not shown). The drive unit 570 moves the focusing lens 362 forward and backward in the optical axis O direction (+ Z, -Z directions) by using the actuator and the like.

(Non-compatible lens 6)
The non-compliant lens 6 includes a non-compliant mount 610, a lens-side terminal holding unit 620, a lens-side CPU 630, a lens-side communication unit 640, a lens-side storage unit 650, an imaging optical system 660, and a driving unit 670. The incompatible mount 610 and the lens-side terminal holding section 620 will be described later in detail.
The non-corresponding lens 6 has a lens whose imaging optical system 660 is different from the imaging optical system 560 of the corresponding lens 5 and moves in the optical axis O direction such as the focusing lens 662 closest to the image. Therefore, the non-compliant lens 6 is formed so that the shape of the non-compliant mount 610 is different from the shape of the corresponding mount 510 so as not to be mounted on the teleconverter 3. The lens-side CPU 630, the lens-side communication unit 640, the lens-side storage unit 650, and the driving unit 670 of the non-compatible lens 6 are the same as the lens-side CPU 530, the lens-side communication unit 540, the lens-side storage unit 550, and the driving unit 570 of the corresponding lens 5. They may be the same, and can be changed as appropriate.

(Body side mount 210)
FIGS. 3 and 4 are views schematically showing the mount of the camera body 2 as viewed from the subject side. 3 and 4 show a state in which the camera body 2 is held at a horizontal position. As shown in FIG. 3, when the camera body 2 is held in the horizontal position, the rectangular image sensor 270 has a horizontal length, that is, a long side is an upper side and a lower side, and a short side is a right side and a left side. A body-side first straight line B1 extending in the vertical direction Y of the camera body 2 shown by a solid line in FIG. 3 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. 3 is viewed from the photographer when the photographer using the camera system 1 holds the camera body 2 in the horizontal position. Left-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 dashed line in FIG. 3, a line extending in a direction intersecting the body-side first straight line B1 and the body-side second straight line B2 at 45 degrees on the optical axis O of the image sensor 270 is defined as a body-side third straight line B3. And a body-side fourth straight line B4.

The mount of the camera body 2 includes a body-side terminal holding portion 220 arranged in an arc shape on the outer periphery of the imaging element 270 and an annular body-side mount 210 arranged outside the body-side terminal holding portion 220. The body-side mount 210 has an annular reference surface 211 having a certain width and arranged along a plane orthogonal to the optical axis O. The body-side mount 210 includes a body-side first claw 290a, a body-side second claw 290b, a body-side third claw 290c, and a body-side fourth claw 290a as protrusions protruding from the inner diameter toward the optical axis O. It has a claw part 290d.
In the following description, the body-side first claw 290a to the fourth claw 290d, which are the four protrusions, are collectively referred to as the body-side claw 290.

  The body-side claws 290 are spaced apart from each other along the circular opening 212 of the body-side mount 210. As shown in FIG. 3, the body-side first claw 290a is at the upper right position, the body-side second claw 290b is at the upper left position, the body-side third claw 290c is at the lower left position, The claw portions 290d are respectively arranged at lower right positions. The body-side first claw portion 290a is located above the body-side second straight line B2 and to the right 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 region on the left side of the first straight line B1, the body-side third claw portion 290c is located below the body-side second straight line B2 and on the left side of the body-side first straight line B1. It is arranged in a region below the second side straight line B2 and on the right side of the first body side straight line B1.

The body-side first claw portion 290a and the body-side third claw portion 290c are arranged on the body-side fourth straight line B4 so as to sandwich the optical axis O. 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 so as to sandwich the optical axis O.
As shown in FIG. 3, the center positions along the circumferential direction of each of the body-side first claw portion 290a to the body-side fourth claw portion 290d are the body-side third straight line B3 and the body-side fourth straight line B4. Do not overlap.

As shown in FIG. 4, 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 290a is the longest, the body-side third claw 290c is the second longest, the body-side fourth claw 290d is the third longest, and the body-side second claw 290b is the longest. Shortest.
An angle α1 between a straight line connecting one end of the body-side first claw portion 290a and the optical axis O and a straight line connecting the other end of the body-side first claw portion 290a and the optical axis O is about 47 degrees, and is 46 degrees. It is between 0.5 degrees and 47.5 degrees.
An angle α3 between 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. Between 42.0 degrees and 43.0 degrees.

An angle α4 between a straight line connecting one end of the body-side fourth claw portion 290d and the optical axis O and a straight line connecting the other end of the body-side fourth claw portion 290d and the optical axis O is about 42 degrees, and 41 It is between 0.5 and 42.5 degrees.
An angle α2 between a straight line connecting one end of the second body-side claw portion 290b and the optical axis O and a straight line connecting the other end of the second body-side claw portion 290b and the optical axis O is about 40 degrees, and is 40 degrees. 0.0 degrees to 41.0 degrees.
The radial lengths (heights of the claw portions) of the body-side first claw portions 290a to the body-side fourth claw portions 290d are the same. Further, the lengths (thicknesses of the claws) of the first body-side claws 290a to the fourth body-side claws 290d in the optical axis O direction 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, and a portion where the body-side claw portion 290 exists and a body-side claw portion 290 exist on the circumference of the opening 212. Some parts do not. In the following description, a 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 second claw portion 290b is formed between the body-side second insertion / extraction portion 280b and the body-side second claw portion 290b and the body-side third claw portion 290c. The space 280c therebetween 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 portion 280a to the fourth insertion / extraction portion 280d, which are these four spaces, are collectively referred to as a body-side insertion / extraction portion 280.

The circumferential lengths of the body-side first insertion / extraction portion 280a to the body-side fourth insertion / extraction portion 280d are different from each other. Specifically, the body-side third insertion / extraction portion 280c is the longest, the body-side first insertion / extraction portion 280a is the second longest, the body-side fourth insertion / extraction portion 280d is the third longest, and the body-side second insertion / extraction portion 280b is the longest. Shortest.
An angle β3 between a straight line connecting one end of the third body-side insertion / extraction portion 280c and the optical axis O and a straight line connecting the other end of the third body-side insertion / extraction portion 280c and the optical axis O is about 51 degrees, and 51. It is between 0 and 52.0 degrees.
An angle β1 between a straight line connecting one end of the body-side first insertion / extraction portion 280a and the optical axis O and a straight line connecting the other end of the body-side first insertion / extraction portion 280a and the optical axis O is about 50 degrees, and 50 0.0 degrees to 51.0 degrees.

An angle β4 between a straight line connecting one end of the body-side fourth insertion / removal portion 280d and the optical axis O and a straight line connecting the other end of the body-side fourth insertion / removal portion 280d and the optical axis O is about 46 degrees, and 45 Between 0.5 degrees and 46.5 degrees.
An angle β2 between a straight line connecting one end of the body-side second insertion / removal portion 280b and the optical axis O and a straight line connecting the other end of the body-side second insertion / removal portion 280b and the optical axis O is about 39 degrees, and 39 0.0 degrees to 40.0 degrees.
The sum of the angles α1 to α4 of all the body-side claws 290 and the angles β1 to β4 of all the body-side insertion / extraction portions 280 is 360 degrees.

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

The body-side first insertion / extraction portion 280a and the body-side third insertion / extraction portion 280c are arranged on the body-side second straight line B2 so as to sandwich the optical axis O. The body-side second insertion / removal portion 280b and the body-side fourth insertion / removal portion 280d are arranged on the body-side first straight line B1 so as to sandwich the optical axis O.
As shown in FIG. 3, the center positions along the circumferential direction of each of the body-side first insertion / extraction portion 280a to the body-side fourth insertion / extraction portion 280d are the body-side first straight line B1 and the body-side second straight line B2. 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 (hereinafter, referred to as "body-side terminal group") 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 section 220 is arranged on the inner peripheral side of the opening 212 of the body-side mount 210 and above the image sensor 270. The center of the body-side terminal holding portion 220 in the circumferential direction is preferably located on the body-side first straight line B1.

  A body-side first claw portion 290a is disposed at the upper right of the body-side terminal holding portion 220, and a body-side second insertion / removal portion 280b is disposed at the upper left of the body-side terminal holding portion 220. Therefore, the angle between the straight line connecting one end of the body-side terminal holding portion 220 and the optical axis O and the straight line connecting the other end of the body-side terminal holding portion 220 and the optical axis O is the body-side first claw portion 290a. Is smaller than the sum of the angle α1 and the angle β2 of the body-side second insertion / extraction portion 280b.

  The body-side terminal group included in the body-side terminal holding section 220 is arranged in an arc shape on the upper side of the image sensor 270. The body side terminal group is a conductive pin. The body-side terminal group is pressed by a spring or the like (not shown) in the −Z direction (FIG. 1) from the image side to the subject side.

  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 on 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. You. The lock pin 214 is pressed in the −Z direction (subject side) by a spring or the like (not shown). The lock pin 214 can move in the + Z direction (image side, image sensor 270 side) against the urging force of the spring by pressing a lock release button (not shown).

FIG. 5 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 subject side. A first leaf spring 213a is provided at a position corresponding to the first body-side claw portion 290a (on the image 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 portion 290b (on the image side of the second body side claw portion 290b), and a position corresponding to the third body side claw portion 290c ( A third leaf spring 213c is provided on the image side of the third body side claw portion 290c), and a third leaf spring 213c is provided at a position corresponding to the fourth body side claw portion 290d (image side of the fourth body side claw portion 290d). Four leaf springs 213d are 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 presses the opposing accessory-side claw portion (described later) 390 or the lens-side claw portions (described later) 590 and 690 on the subject side toward the image sensor 270 (+ Z direction).

  As shown in FIG. 5, near the straight line B10 connecting the optical axis O and the rear end of the mounting direction 44 (described later) of the first leaf spring 213a, the rear end of the mounting direction 44 of the body-side terminal holding section 220 is positioned. Be placed. The second leaf spring 213b, the third leaf spring 213c, and the fourth leaf spring 213d are arranged at intervals of about 90 degrees around the optical axis O starting from the first leaf spring 213a.

(Rear mount 310 of teleconverter 3)
6 and 7 are views schematically showing the rear mount of the teleconverter 3 as viewed from the image side. The teleconverter-side first straight line L1 extending in the vertical direction Y of the teleconverter 3 shown by a solid line in FIG. 6 is a vertical line viewed from the photographer when the photographer using the camera system 1 holds the camera body 2 in the horizontal position. Direction. The teleconverter-side second straight line L2 extending in the horizontal direction X of the teleconverter 3 shown by a solid line in FIG. 6 is used when the photographer using the camera system 1 holds the camera body 2 in the horizontal position. It is the right and left direction seen.

  The teleconverter-side first straight line L1 and the teleconverter-side second straight line L2 are orthogonal to each other on the optical axis O of the interchangeable lens 3. As shown by a dashed line in FIG. 6, a line extending in a direction intersecting the first teleconverter-side straight line L1 and the second teleconverter-side straight line L2 at 45 degrees on the optical axis O is referred to as a third teleconverter-side straight line L3 and a third teleconverter-side straight line. Let it be four straight lines L4. When the teleconverter 3 is mounted on the camera body 2 in a usable state, the first straight line B1 on the body side and the first straight line L1 on the teleconverter coincide with each other, and the second straight line B2 on the body side and the second straight line L2 on the teleconverter side. The third straight line B3 on the body side matches the fourth straight line L4 on the teleconverter side, and the fourth straight line B4 on the body side matches the third straight line L3 on the teleconverter side. Even if the straight lines do not completely coincide with each other, a deviation may occur within a range where the teleconverter 3 can be mounted on the camera body 2 in a properly usable state.

  The mount of the teleconverter 3 includes a rear terminal holding portion 320 that contacts the body side terminal holding portion 220 and a rear mount 310 that contacts the body side mount 210 when the teleconverter 3 is mounted on the camera body 2. . The rear mount 310 is formed in an annular shape with the optical axis O of the teleconverter 3 as a center, and is arranged along a plane orthogonal to the optical axis O. The rear mount 310 has a reference surface 311 that comes into contact with the reference surface 211 of the body mount 210 when the teleconverter 3 is mounted on the camera body 2. The reference plane 311 has an annular shape centered on the optical axis O, and is arranged along a plane 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 to which a lock pin 214 described later is slid in a mounted state is provided toward the −Z direction on a cross section along the Z direction. It is formed in a concave shape from the reference surface 311. The lock pin sliding surface 309 is at least a part of an annular shape centered on the optical axis O, and is arranged along a plane orthogonal to the optical axis O.

  The rear mount 310 is fixed to the fixing member arranged inside the teleconverter 3 by screwing using a screw 313. When the rear mount 310 is viewed from the camera body 2 side, the screws 313 are arranged around the optical axis O at approximately 90-degree intervals. The four screws 313 are arranged on the outer periphery of four rear claw portions 390 described later. The two screws 313 are arranged on the outer periphery of both ends of the rear terminal holding portion 320 in the circumferential direction.

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

  The rear claw portion 390 is provided in a direction protruding from the outer peripheral edge of the cylindrical portion 312 of the rear mount 310 toward the outer peripheral direction of the rear mount 310, and is substantially orthogonal to the optical axis O. In addition, the rear claw portion 390 extends in a circumferential direction around the optical axis O. As shown in FIGS. 6 and 7, the rear first claw 390a is at the upper left position, the rear second claw 390b is at the upper right position, the rear third claw 390c is at the lower right position, The rear fourth claw 390d is arranged at the lower left position. That is, the rear first claw portion 390a is located above the teleconverter-side second straight line L2 and to the left of the teleconverter-side first straight line L1, the rear second claw portion 390b is located above the teleconverter-side second straight line L2, and The rear third claw portion 390c is located on the right side of the teleconverter-side first straight line L1, and the rear fourth claw portion 390d is located below the teleconverter-side second straight line L2 and on the right side of the teleconverter-side first straight line L1. Are arranged below the teleconverter-side second straight line L2 and on the left side of the teleconverter-side first straight line L1, respectively.

The rear first claw portion 390a and the rear third claw portion 390c are located on the teleconverter-side third straight line L3 and are substantially symmetrical with respect to the optical axis O. The 390b and the rear fourth claw portion 390d are respectively arranged on the teleconverter-side fourth straight line L4 in substantially target areas around the optical axis O.
The third straight line L3 on the teleconverter side and the fourth straight line L4 on the teleconverter side do not necessarily pass through the center position along the circumferential direction of each of the first rear claw portion 390a to the fourth rear claw portion 390d.

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

  When the leaf spring 213 of the body-side claw 290 comes into contact with the rear claw 390, the rear 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 rear claw portion 390 is pressed in the + Z direction (toward the imaging element 270), the rear mount 310 is pressed toward the body-side mount 210, and the mounting of the camera body 2 and the teleconverter 3 is stabilized.

As shown in FIG. 7, the circumferential lengths of the rear first claw 390a to the rear fourth claw 390d are different from each other. In addition, a straight line connecting one end in the circumferential direction of the rear first claw portion 390a to the rear fourth claw portion 390d and the circumference of the rear first claw portion 390a to the rear fourth claw portion 390d. The angle between the other end of the direction and the straight line connecting the optical axis O is different from each other. Specifically, the rear third claw 390c is the longest, the rear first claw 390a is the second longest, the rear fourth claw 390d is the third long, and the rear second claw 390b is Shortest.
An angle α7 between a straight line connecting one end of the rear third claw portion 390c and the optical axis O and a straight line connecting the other end of the rear third claw portion 390c and the optical axis O is about 48.5 degrees. , 48.0 degrees to 49.0 degrees.
An angle α5 between a straight line connecting one end of the rear first claw portion 390a and the optical axis O and a straight line connecting the other end of the rear first claw portion 390a and the optical axis O is about 48 degrees, and 47 Between 0.5 degrees and 48.5 degrees.

An angle α8 between a straight line connecting one end of the rear fourth claw portion 390d and the optical axis O and a straight line connecting the other end of the rear fourth claw portion 390d and the optical axis O is about 44 degrees, and 43 Between 0.0 and 45.0 degrees.
An angle α6 between a straight line connecting one end of the rear second claw portion 390b and the optical axis O and a straight line connecting the other end of the rear second claw portion 390b and the optical axis O is about 36 degrees, and is 35 degrees. It is between 0.5 degrees and 36.5 degrees.
Note that an angle α6 between a straight line connecting one end of the rear second claw portion 390b and the optical axis O and a straight line connecting the other end of the rear second claw portion 390b and the optical axis O is a rotation angle described later. Less than.

  The radial lengths (heights of the claw portions) of the rear first claw portions 390a to the rear fourth claw portions 390d are substantially the same. Further, the lengths (thicknesses of the claw portions) of the rear first claw portions 390a to the rear fourth claw portions 390d in the optical axis O direction are substantially the same.

  The rear claw portion 390 protrudes radially outward from the outer periphery of the cylindrical portion 312, and a portion where the rear claw portion 390 exists and a space where the rear claw portion 390 does not exist on the outer periphery of the cylindrical portion 312. There are parts.

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

The circumferential lengths of the rear first insertion / extraction portion 380a to the rear fourth insertion / extraction portion 380d are different from each other. Specifically, the rear second insertion / extraction portion 380b is the longest, the rear first insertion / extraction portion 380a is the second longest, the rear fourth insertion / extraction portion 380d is the third longest, and the rear third insertion / extraction portion 380c is Shortest.
An angle β6 between a straight line connecting one end of the rear second insertion / extraction portion 380b and the optical axis O and a straight line connecting the other end of the rear second insertion / extraction portion 380b and the optical axis O is about 50 degrees, and 49 It is between 0.5 degrees and 50.5 degrees.
An angle β5 between a straight line connecting one end of the rear first insertion / extraction portion 380a and the optical axis O and a straight line connecting the other end of the rear first insertion / extraction portion 380a and the optical axis O is about 45 degrees, and 44 It is between 0.5 degrees and 45.5 degrees.

An angle β8 between a straight line connecting one end of the rear fourth insertion / removal portion 380d and the optical axis O and a straight line connecting the other end of the rear fourth insertion / removal portion 380d and the optical axis O is about 44.5 degrees. , 44.0 degrees to 45.0 degrees.
An angle β7 between a straight line connecting one end of the rear third insertion / extraction portion 380c and the optical axis O and a straight line connecting the other end of the rear third insertion / extraction portion 380c and the optical axis O is about 44 degrees. It is between 43.5 degrees and 44.5 degrees.
The total value of the angles α5 to α8 of all the rear claw portions and the angles β5 to β8 of all the rear insertion / extraction portions is 360 degrees.

Further, the rear first insertion / extraction portion 380a and the rear third insertion / extraction portion 380c are arranged on the teleconverter side second straight line L2 so as to sandwich the optical axis O, and are connected to the rear second insertion / extraction portion 380b. The fourth insertion / extraction portion 380d is disposed on the teleconverter-side first straight line L1 so as to sandwich the optical axis O.
Note that the teleconverter-side first straight line L1 and the teleconverter-side second straight line L2 do not necessarily pass through the center positions along the circumferential direction of the rear first insertion / extraction portion 380a to the rear fourth insertion / extraction portion 380d.

  A rear terminal holding portion 320 including a plurality of rear terminals is provided inside the cylindrical portion 312. The rear terminal holding portion 320 has an arc shape corresponding to the shape of the annular rear mount 310. The rear terminal holding portion 320 is arranged on the upper portion of the rear mount 310 in parallel with the opening of the rear mount 310, and is preferably arranged at the center of the upper portion as shown in FIGS. That is, the center of the rear terminal holding portion 320 in the circumferential direction is preferably located on the straight line B10.

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

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

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

  The rear mount 310 has a lock pin receiving portion 314. The lock pin receiving portion 314 is arranged on the upper left of the rear fourth claw portion 390d as shown in FIGS. That is, the lock pin receiving portion 314 corresponds to the portion of the lock pin sliding surface 309 of the rear mount 310 corresponding to the outer peripheral side of the rear first claw portion 390a and the outer peripheral side of the rear fourth claw portion 390d. It is located between the parts that do.

The lock pin receiving portion 314 is a groove for receiving the lock pin 214 of the camera body 2 when the teleconverter 3 is mounted on the camera body 2. This groove is provided in a concave shape in the −Z direction (FIG. 1) from the lock pin sliding surface 309 of the rear mount 310.
In the state where the lock release button of the camera body 2 is not pressed, the end of the lock pin 214 in the −Z direction (the front end on the subject side) fits in the lock pin receiving portion 314 of the rear mount 310. When the lock release button of the camera body 2 is pressed, the end of the lock pin 214 in the −Z direction is located in the + Z direction from the lock pin sliding surface 309. Therefore, when the teleconverter 3 and the camera body 2 are relatively rotated while pressing the lock release button of the camera body 2, the lock pin 214 does not contact the sliding surface 309 for the lock pin.

  When the teleconverter 3 is mounted on the camera body 2, the plurality of body terminals physically contact the corresponding plurality of rear terminals. By this contact, the plurality of body terminals and the plurality of rear terminals are electrically connected. That is, the plurality of body terminals and the plurality of rear terminals are electrically connected.

As shown in FIG. 8, between the reference surface 311 of the rear mount 310 and the rear fourth claw portion 390d, a restriction pin 315 is arranged in a direction protruding from the outer peripheral surface of the cylindrical portion 312. The restriction pin 315 is arranged on the rear end side of the mounting direction 44 of the rear fourth claw 390d (a position close to the rear third claw 390c). A part of the restriction pin 315 is disposed on the back side of the rear fourth claw 390d when the rear fourth claw 390d is viewed from behind the teleconverter 3 (image side).
In the present embodiment, the limiting pin 315 is screwed to the cylindrical portion 312 from the outside in the radial direction by using a screw member, but the shape and material of the limiting pin 315 are not limited thereto.

(Front mount 410 of teleconverter 3)
9 and 10 are views schematically showing a mount on the front side (subject side, corresponding lens 5 mounting side) of the teleconverter 3 as viewed from the subject side. The front mount 410 of the teleconverter 3 is different from the body mount 210 in that a projection 415 (described later) is provided.

The front mount of the teleconverter 3 includes a front mount 410, a front terminal holding section 420, a reference surface 411, an opening 412, a lock pin 414, a front insertion / extraction section 480, and a front claw section 490. The front mount 410, the front terminal holding portion 420, the reference surface 411, and the opening 412 are substantially equivalent to the body side mount portion 210, the body side terminal holding portion 220, the reference surface 211, the opening 212, and the lock pin 214 of the body side mount 210. is there. The front terminal holding section 420 has a plurality of front terminals (hereinafter, referred to as “front terminal group”). The front terminal group is connected to the teleconverter control / communication unit 330 and the like.
9 are the same as the body-side reference lines B1 to B4 of the body-side mount 210.

  The front mount 410 has a front first claw 490a, a front second claw 490b, a front third claw 490c, and a front fourth claw 490d as protrusions protruding from the inner diameter toward the optical axis O, respectively. . In the following description, the front first claw portions 490a to 490d, which are the four protruding portions, are collectively referred to as front claw portions 490. The front claw 490 is similar to the body claw 290.

  The front mount 410 has a protrusion 415 projecting from the inner diameter toward the optical axis O. The protrusion 415 is arranged along the circular opening 412 of the front mount 410 at an interval between the front second claw 490b and the front third claw 490c. As shown in FIG. 9, the protrusion 415 is arranged at least partially below the teleconverter-side second straight line B6 and on the left side of the teleconverter-side first straight line B5. The circumferential length of the protrusion 415 is shorter than any of the front claw portions 490.

The front claw 490 and the protrusion 415 protrude from the opening 412 of the front mount 410 toward the optical axis O, and there are portions on the circumference of the opening 412 where the front claw 490 and the protrusion 415 do not exist. The space between the front first claw portion 490a and the front fourth claw portion 490d on the circumference of the opening 412 is referred to as a front first insertion / extraction portion 480a.
Similarly, the space between the front first claw portion 490a and the front second claw portion 490b is the front second insertion / extraction portion 480b, and the space between the front second claw portion 490b and the projection 415 is the front third insertion / extraction portion 480c. The space between the protrusion 415 and the front third claw portion 490c is a front fourth insertion / extraction portion 480d, and the space between the front third claw portion 490c and the fourth fourth claw portion 490d is a front fifth insertion / extraction portion 480e. Respectively. The front first insertion / extraction portion 480a to the fifth insertion / extraction portion 480e that are these five spaces are collectively referred to as a front insertion / extraction portion 480. The front first insertion / extraction section 480a, the front second insertion / extraction section 480b, and the front fifth insertion / extraction section 480e are the same as the body side first insertion / extraction section 280a, the body side second insertion / extraction section 280b, and the body side fourth insertion / extraction section 280d.

  The circumferential lengths of the front first insertion / extraction portion 480a to the front fifth insertion / extraction portion 480e are different from each other. Specifically, the front first insertion / extraction portion 480a is the longest, the front fifth insertion / extraction portion 480e is the second longest, the front second insertion / extraction portion 480b is the third longest, and the front fourth insertion / extraction portion 480d is the fourth longest. , The front third insertion / removal portion 480c is the shortest.

An angle α11 between a straight line connecting one end of the protrusion 415 and the optical axis O and a straight line connecting the other end of the protrusion 415 and the optical axis O is about 8 degrees, and is between 5 degrees and 10 degrees. An angle β11 between a straight line connecting one end of the protrusion 415 and the optical axis O and a straight line connecting the other end of the front second claw portion 490b and the optical axis O is about 12 degrees, and is between 10 degrees and 14 degrees. It is. An angle β12 between a straight line connecting the other end of the protrusion 415 and the optical axis O and a straight line connecting one end of the front third claw portion 490c and the optical axis O is about 30 degrees, and is between 28 degrees and 32 degrees. It is.
The sum of the angles α9 to α13 of all the front claw portions 490 and the projections and the angles β9 to β13 of all the front insertion / extraction portions 480 is 360 degrees.

  FIG. 22 is a schematic diagram of the front mount 410 viewed from the image sensor side (image side). FIG. 22 is left and right reversed from FIGS. 9 and 10. A leaf spring 413 is provided at a position corresponding to the front claw 490 (on the image side of the front claw 490). The leaf spring 413 is substantially the same as the leaf spring 213 provided on the body-side mount 210, but can be appropriately changed as long as the corresponding lens 5 can be mounted. The area where the leaf spring 413 urges the lens-side claw portion 590 of the corresponding lens 5 described later is indicated by a dotted line area. The projection 415 does not have a leaf spring 413 on the image side since a lens-side claw 510 of a corresponding mount 510 described below does not oppose the mounting when the mounting is completed.

(Compatible mount 510 for compatible lens 5)
11 and 12 are schematic views of the corresponding mount 510 of the corresponding lens 5 as viewed from the image side. The compatible mount 510 differs from the non-compliant mount 610 of the non-compliant lens 6 and the rear mount 310 of the teleconverter 3 in that a notch is provided to allow the projection 415 of the front mount 410 to pass through when mounted. The lens-side reference lines L5 to L8 in FIG. 11 are the same as the teleconverter-side reference lines L1 to L4 of the rear mount 310 of the teleconverter 3.

  The image-side mount of the corresponding lens 5 includes a corresponding mount 510, a lens-side terminal holding portion 520, a reference surface 511, a sliding surface 509 for a lock pin, a screw 513, a cylindrical portion 512, a lock pin receiving portion 514, and a lens-side claw portion. 590, and a lens side insertion / extraction unit 580. The lens-side terminal holding portion 520, the reference surface 511, the lock pin sliding surface 509, the screw 513, the cylindrical portion 512, and the lock pin receiving portion 514 include the rear terminal holding portion 320, the reference surface 311 and the lock of the rear mount 310. They are substantially the same as the pin sliding surface 309, screw 313, cylindrical portion 312, and lock pin receiving portion 314. The lens-side terminal holding section 520 has a plurality of lens-side terminals (hereinafter referred to as “lens-side terminal group.” The lens-side terminal group is connected to the lens-side CPU 530 and the like.

  The mount on the image side of the corresponding lens 5 includes a lens-side claw 590 disposed between the front mount 410 and the front-side claw 490 in the optical axis O direction when the corresponding lens 5 is mounted on the teleconverter 3. Prepare. The mount on the image side of the corresponding lens 5 includes a lens-side insertion / extraction portion 580 that allows the corresponding lens-side claw portion 590 to pass when the corresponding lens 5 is mounted on the teleconverter 3.

  The number of lens-side claw portions 590 and the number of lens-side insertion / extraction portions 580 are at least two or more, respectively, and are five in this embodiment. It is preferable that the number of lens-side claw portions 590 and the number of lens-side insertion / extraction portions 580 be four or more, respectively, because sufficient strength can be obtained even when the diameter of the cylindrical portion 312 is increased. In the present embodiment, the lens-side first insertion / extraction portion 580a, the lens-side first claw portion 590a, and the lens-side second insertion / extraction portion are arranged in order from the inner peripheral position on the lock pin receiving portion 514 side along the circumferential direction of the cylindrical portion 512. 580b, lens-side second claw 590b, lens-side third insertion / extraction 580c, lens-side third claw 590c, lens-side fourth insertion / extraction 580d, lens-side fourth claw 590d, lens-side fifth insertion / extraction 580e, A lens-side fifth claw 590e is arranged.

  When the corresponding lens is mounted on the teleconverter 3, the four lens-side pawls 590 other than the third lens-side pawl 590c contact the leaf springs 413 of the front mount 410, respectively. When the leaf spring 413 comes into contact with each of the four lens-side pawls 590, the four lens-side pawls 590 are pressed by the leaf spring 413 in a direction away from the front-side pawl 490. Thus, the four lens-side claws 590 are pressed against the front mount 410, and the mounting of the teleconverter 3 and the corresponding lens 5 is stabilized.

  As shown in FIG. 11, the circumferential lengths of the lens-side claws 590 are different from each other. That is, the angles formed by the straight line connecting one end in the circumferential direction of each lens-side claw portion 590 and the optical axis O and the straight line connecting the other end and the optical axis O are different from each other. Specifically, the lens-side first claw 590a is the longest, the lens-side fifth claw 590e is the second longest, the lens-side second claw 590b is the third longest, and the lens-side fourth claw 590d is the longest. It is the fourth longest, and the third claw 590c on the lens side is the shortest. The length in the circumferential direction of each lens-side claw portion 590 only needs to be able to receive the urging force from the leaf spring 413 when the corresponding lens 5 is mounted on the teleconverter 3. It is preferable that at the time of insertion, at least two of the front claw portions 490 abut on an erroneous mounting position described later.

An angle α14 between a straight line connecting one end of the first lens-side claw 590a and the optical axis O and a straight line connecting the other end of the first lens-side claw 590a and the optical axis O is about 48 degrees, and 46 Degrees to 50 degrees.
An angle α15 between a straight line connecting one end of the second lens-side claw portion 590b and the optical axis O and a straight line connecting the other end of the second lens-side claw portion 590b and the optical axis O is about 36 degrees, and is 34 degrees. Degrees to 38 degrees. Note that the angle α6 is smaller than the rotation angle.
An angle α16 between a straight line connecting one end of the third lens-side claw portion 590c and the optical axis O and a straight line connecting the other end of the third lens-side claw portion 590c and the optical axis O is approximately 9.5 degrees. , 7.5 degrees to 11.5 degrees.
An angle α17 between a straight line connecting one end of the lens-side fourth claw portion 590d and the optical axis O and a straight line connecting the other end of the lens-side fourth claw portion 590d and the optical axis O is about 29 degrees, and is 27 degrees. Degrees to 31 degrees.
An angle α18 between a straight line connecting one end of the lens-side fifth claw 590e and the optical axis O and a straight line connecting the other end of the lens-side fifth claw 590e and the optical axis O is about 43 degrees, and 41 Between 45 and 45 degrees.

The radial lengths (heights of the claw portions) of the first claw portion 590a to the fifth claw portion 590e are substantially the same. Further, the lengths (thicknesses of the claws) of the first to fifth lens-side claws 590a to 590e in the optical axis O direction are substantially the same. Since the third lens-side claw 590c does not receive the biasing force from the leaf spring 413 when the mounting is completed, the height and height of the third lens-side claw 590c are higher than those of the other lens-side claw, as long as the third third claw 590c is not damaged by erroneous insertion. The thickness may be reduced.
The circumferential lengths of the first lens-side insertion / extraction portion 580a to the fifth lens-side insertion / extraction portion 580e are different from each other. Specifically, the lens-side second insertion / extraction portion 580b is the longest, the lens-side first insertion / extraction portion 580a, the lens-side third insertion / extraction portion 580c, and the lens-side fifth insertion / extraction portion 580e are substantially the same, The portion 580d is the shortest. The circumferential length of each lens-side insertion / extraction portion 580 can be appropriately changed as long as the corresponding mount 510 can be passed through the front claw portion 490 when the corresponding mount 510 is inserted into the front mount 410.

An angle β14 between a straight line connecting one end of the lens-side first insertion / extraction portion 580a and the optical axis O and a straight line connecting the other end of the lens-side first insertion / extraction portion 580a and the optical axis O is about 45 degrees, and 47 Degrees to 52 degrees.
An angle β15 formed by a straight line connecting one end of the lens-side second insertion / extraction portion 580b to the optical axis O and a straight line connecting the other end of the lens-side second insertion / extraction portion 580b to the optical axis O is about 49.5 degrees. , 48 degrees to 51 degrees.
An angle β16 between a straight line connecting one end of the third lens-side insertion / extraction portion 580c and the optical axis O and a straight line connecting the other end of the third lens-side insertion / extraction portion 580c and the optical axis O is about 44 degrees, and 42 Degrees to 46 degrees.
The angle β17 between a straight line connecting one end of the fourth lens-side insertion / extraction portion 580d and the optical axis O and a straight line connecting the other end of the fourth lens-side insertion / extraction portion 580d and the optical axis O is about 10 degrees, and is 8 degrees. It is between degrees and 11 degrees. Note that the angle β17 can be appropriately changed as long as it is larger than the angle α11 of the protrusion 415.
An angle β18 between a straight line connecting one end of the fifth lens-side fifth insertion / removal portion 580e and the optical axis O and a straight line connecting the other end of the fifth lens-side fifth insertion / removal portion 580e and the optical axis O is about 44.5 degrees. Between 42.5 degrees and 46.5 degrees.
The sum of the angles α14 to α18 of all the lens-side claw portions 590 and the angles β14 to β18 of all the lens-side insertion / extraction portions 580 is 360 degrees.

The lens-side first claw portion 590a includes at least a portion of the lens-side third claw portion 590c, at least a portion of the lens-side fourth insertion / extraction portion 580d, and at least a portion of the lens-side fourth claw portion 590d, and the lens-side third straight line L7. Are arranged so as to sandwich the optical axis O.
A lens-side first claw portion 590a is disposed on the upper left of the lens-side terminal holding portion 520, and a lens-side second insertion / removal portion 580b is disposed on the upper right of the lens-side terminal holding portion 520. Therefore, the angle formed by the straight line connecting one end of the lens-side terminal holding portion 520 and the optical axis O and the straight line connecting the other end of the lens-side terminal holding portion 520 and the optical axis O is the first lens-side claw portion 590a. Is smaller than the sum of the angle α14 and the angle β15 of the lens-side second insertion / extraction portion 580b.
As shown in FIG. 8, between the reference surface 511 of the corresponding mount 510 and the lens-side fifth claw portion 590e, a restriction pin 5 (not shown) is arranged in a direction protruding from the outer peripheral surface of the cylindrical portion 512. I have. This restriction pin is substantially equivalent to the restriction pin 315 of the rear mount 310 shown in FIG.

(Non-compatible mount 610 of non-compatible lens 6)
The mount on the image side of the non-compatible lens 6 is substantially the same as the mount on the rear side of the teleconverter 3. In addition to the non-compatible mount 610, a reference surface, a sliding surface for a lock pin, a screw, a cylindrical portion, and an insertion / extraction portion And a claw portion. The reference surface of the incompatible lens 6, the sliding surface for the lock pin, the screw, the cylindrical portion, the insertion / extraction portion, and the claw portion are substantially the same as the rear mount of the teleconverter 3, and are not shown. The mount on the image side of the non-corresponding lens 6 is substantially the same as the mount on the rear side of the teleconverter 3, and the mounting method to the camera body 2 described later, the removing method, and the erroneous insertion preventing method are also the same. The non-compliant mount 610 includes a terminal holding section having substantially the same shape as the rear terminal holding section 320. The terminal holding portion of the non-compatible mount 610 includes a plurality of lens-side terminal groups, and when mounted on the camera body 2, comes into contact with the body-side terminal groups of the body-side mount 210 and becomes electrically conductive. The lens-side terminal group of the non-corresponding lens 610 is connected to the lens-side CPU 640.

  Here, the body-side claw portion 290, the rear-side claw portion 390, the front-side claw portion 490, and the lens-side claw portion 590 are collectively referred to as claw portions, and the body-side insertion / extraction portion 280, the rear-side insertion / extraction portion 380, the front-side insertion / extraction portion 480, The lens side insertion / extraction unit 580 is generically referred to as an insertion / extraction unit.

(How to attach the teleconverter 3 to the camera body 2)
Next, a method of attaching the teleconverter 3 to the camera body 2 will be described with reference to FIGS. FIGS. 13 and 14 are views showing the positional relationship between the body-side claw portion 290 of the camera body 2 and the rear-side claw portion 390 of the teleconverter 3 so that the contact state between the claw portions can be understood. is there. 13 and 14 are views of the body-side mount 210 and the rear-side mount 310 as viewed from the subject side toward the image sensor 270 (in the + Z direction). 6, FIG. 7 is reversed left and right.

  When attaching the teleconverter 3 to the camera body 2, first, the index (not shown) attached to the outer peripheral surface of the teleconverter 3 and the index (not shown) attached to the exterior surface of the camera body 2 are aligned. With the body mount 210 and the rear mount 310 facing each other, each rear claw 390 is inserted into each body side insertion / extraction section 280. That is, as shown in FIG. 13, the rear first claw portion 390a is inserted into the body-side first insertion / extraction portion 280a, and the rear second claw portion 390b is inserted into the body-side second insertion / extraction portion 280b. The three claws 390c are inserted into the third body insertion / extraction portion 280c, and the fourth rear claw 390d is inserted into the fourth body insertion / extraction portion 280d. At this time, the body-side first claw portion 290a is inserted into the rear-side second insertion / extraction portion 380b, the body-side second claw portion 290b is inserted into the rear-side third insertion / extraction portion 380c, and the body-side third claw portion 290c is inserted into the rear. The body-side fourth claw portion 290d is inserted into the fourth side insertion / extraction portion 380d, and the body-side fourth claw portion 290d is inserted into the rear first insertion / extraction portion 380a. The position of the teleconverter 3 with respect to the camera body 2 at this time is called an insertion position.

  From the insertion position, the teleconverter 3 is rotated in the mounting direction 44 shown in FIG. The mounting direction 44 is a direction along a circumferential direction around the optical axis O in a plane substantially perpendicular to the optical axis O. With the rotation of the teleconverter 3, the body-side first claw 290a and the leaf spring 213a enter the space between the rear first claw 390a and the reference surface 311.

That is, the rear first claw 390a enters the image sensor 270 side (+ Z side) of the body-side first claw 290a, and the rear first claw 390a moves toward the image sensor 270 (+ Z side) of the leaf spring 213a. Oppose. At the same time, the body-side first claw portion 290a and the leaf spring 213a enter the space between the rear 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 rear second claw portion 390b and the reference surface 311 to provide a space between the rear third claw portion 390c and the reference surface 311. The body-side third claw 290c and the leaf spring 213c enter the space, and the body-side fourth claw 290d and the leaf spring 213d enter the space between the rear fourth claw 390d and the reference surface 311. At this time, the rear terminal group contacts the body side terminal group in order.
Although the teleconverter 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 teleconverter 3.

  FIG. 14 is a diagram in which the teleconverter 3 is rotated by the first angle in the mounting direction 44 with respect to the camera body 2 from the insertion position in FIG. 13, and shows a state in which the teleconverter 3 has been mounted on the camera body 2. The position of the teleconverter 3 at this time is called a mounting position. The first angle is approximately 40 degrees in the present embodiment, and is from 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 teleconverter 3. When the lock pin 214 enters the lock pin receiving portion 314, the teleconverter 3 regulates the rotation for removing the tele converter 3 from the camera body 2. That is, when each body-side claw portion 290 and each rear-side claw portion 390 reach the mounting position, the relative position in the circumferential direction between the body-side mount 210 and the rear-side mount 310 is determined.

The rear claw 390 is pushed toward the image sensor 270 (+ Z direction) by the leaf spring 213, and the reference surface 311 of the rear mount 310 contacts the reference surface 211 of the body mount 210. When the rear mount 310 comes into surface contact with the body-side mount 210 and is urged by the leaf spring 213, the teleconverter 3 and the camera body 2 are firmly mounted.
In the mounting position, each of the plurality of rear terminals contacts each of the corresponding plurality of body terminals and is electrically connected.

  The state from the state where each rear claw portion 390 in FIG. 13 is inserted into the corresponding body side insertion / extraction section 280 at the insertion position to immediately before the mounting position in FIG. 14 is referred to as a mounting state. Since the lock pin 214 of the camera body 2 is pressed in the −Z direction, the end of the lock pin 214 in the −Z direction is in contact with the lock pin sliding surface 309 of the rear mount 310 during the mounting state.

  As the teleconverter 3 rotates, the end of the lock pin 214 in the −Z direction slides on the lock pin sliding surface 309 of the teleconverter 3. Therefore, the fixing screw for fixing the rear mount 310 is not arranged 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 opposite direction, the end of the lock pin 214 in the −Z direction does not hit the fixing screw when sliding on the lock pin sliding surface 309, so that the lock pin 214 smoothly moves. The teleconverter 3 can be attached and detached.

(How to remove the teleconverter 3 from the camera body 2)
When the user presses a lock release button (not shown) of the camera body 2 at the mounting position, the lock pin 214 retreats from the lock pin receiving portion 314 to the image sensor 270 side. Thereby, the rotation restriction of the teleconverter 3 with respect to the camera body 2 is released, and the rear mount 310 can be rotated with respect to the body-side mount 210. When the teleconverter 3 is rotated with respect to the camera body 2 in a direction opposite to the mounting direction 44 (removal direction) while pressing an unlock button (not shown), each rear claw portion 390 becomes 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.

(Explanation of the excessive rotation state in the mounting direction when mounting the teleconverter 3 on the camera body 2)
Next, an over-rotation state in which the teleconverter 3 is rotated in the mounting direction 44 by a first angle or more with respect to the camera body 2 will be described with reference to FIG. FIG. 15 is a schematic diagram showing the positional relationship between the fourth claw portion 290d on the body side of the camera body 2 and the fourth claw portion 390d on the rear side of the teleconverter 3. The upper part (a) of the dashed-dotted line indicates the image sensor from the subject side. FIG. 270 is a view as viewed toward the 270 side, and a lower part (b) of a dashed line is a view of the mount as viewed from a side surface (outer peripheral direction). When the tele converter 3 is mounted on the camera body 2 and the user rotates the tele converter 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 teleconverter 3 can be further rotated with respect to the camera body 2 from the mounting position shown in FIG. When the teleconverter 3 is further rotated relative to the camera body 2 in the mounting direction 44 than the mounting position, the restriction pin 315 abuts on the rear end of the mounting direction 44 of the body-side fourth claw 290d, and the teleconverter 3 is moved. Further rotation of the camera body 2 with respect to the camera body 2 is prevented.

(Explanation of the excessive rotation state in the removal direction when removing the teleconverter 3 from the camera body 2)
Next, an over-rotation state in which the teleconverter 3 is rotated relative to the camera body 2 in a direction opposite to the mounting direction 44 (removing direction) from the insertion position with respect to the camera body 2 will be described with reference to FIG. FIG. 16 is a side view of a part of the lens mount mechanism in an over-rotation state in the detaching direction. Since the restriction pin 315 is disposed at the rear end of the rear fourth claw portion 390d in the mounting direction 44, if the user attempts to reversely rotate the teleconverter 3 after inserting the teleconverter 3 into the camera body 2, the restriction pin 315 is restricted. The pin 315 abuts on the distal end of the body-side third claw portion 290c in the mounting direction 44 to prevent the teleconverter 3 from rotating further in the detaching direction with respect to the camera body 2.

As described above, the limiting pin 315 abuts on the circumferential end of the body-side claw portion 290, thereby preventing both the excessive rotation in the mounting direction 44 and the excessive rotation in the removing direction. Since the restriction pin 315 prevents both the over rotation in the mounting direction 44 and the over rotation in the removing direction, two members, a member for preventing over rotation in the mounting direction 44 and a member for preventing over rotation in the removing direction, are provided. No need to prepare.
Further, since the limiting pin 315 prevents over-rotation by using the circumferential end of the body-side claw portion 290, there is no need to separately provide a member that contacts the limiting pin 315 during over-rotation.

(Explanation of erroneous insertion of teleconverter 3 into camera body 2)
Next, an erroneous insertion state in which the user attempts to insert the teleconverter 3 into the camera body 2 at an incorrect position without matching the index of the teleconverter 3 with the index of the camera body 2 will be described. Since the rear claw portion 390 does not pass through the body side insertion / extraction portion 280 in the erroneous insertion state, the positional relationship between the rear claw portion 390 and the body side claw portion 290 on the optical axis O is different from the positional relationship at the insertion position. different. 17 to 20 are schematic diagrams showing the positional relationship between the body-side claw portion 290 of the camera body 2 and the rear-side claw portion 390 of the teleconverter 3 so that the abutting state of the claw portions can be understood. It is. 17 to 20 are views of the body-side mount 210 and the rear-side mount 310 as viewed from the subject side toward the image sensor 270 (in the + Z direction). 6, FIG. 7 is reversed left and right. As an example of the erroneous insertion state, FIG. 17 shows a state in which the index of the teleconverter 3 and the index of the camera body 2 are shifted from the insertion position by 15 degrees in the removal direction. FIGS. 18 to 20 show a state in which the index of the teleconverter 3 and the index of the camera body 2 are shifted from the insertion position by 90 intervals.

  FIG. 17 shows a state where the insertion position is shifted by 15 degrees in the removal direction (first erroneous insertion state). As shown by hatching in FIG. 17, the rear claw portion 390 abuts on the body side claw portion 290 at the portions indicated by the four symbols γ1 to γ4, so that the rear claw portion 390 is not inserted into the body side insertion / extraction portion 280. In other words, in the first erroneous insertion state, the rear claw 390 and the body-side claw 290 abut at four locations, thereby reliably preventing erroneous insertion.

  FIG. 18 is a diagram showing a state in which the index of the teleconverter 3 and the index of the camera body 2 are shifted from the insertion position by about 90 degrees in the removal direction (second erroneous insertion state). FIG. 19 is a diagram illustrating a third erroneous insertion state in which the index of the teleconverter 3 and the index of the camera body 2 are shifted from the insertion position by approximately 180 degrees in the removal direction. FIG. 20 is a diagram illustrating a fourth erroneous insertion state in which the index of the teleconverter 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. 18, in the case of the second erroneous insertion state, the rear third claw portion 390c has a portion indicated by reference numeral γ5 on the body-side first claw portion 290a, and has a γ7 on the body-side second claw portion 290b. The portion shown in the figure hits, and cannot be inserted into the second insertion / extraction portion 280b on the body side. In addition, the rear first claw portion 390a comes into contact with the body-side fourth claw portion 290d at the portion indicated by reference numeral γ6, and cannot be inserted into the body-side fourth insertion / removal portion 280d. In this manner, in the second erroneous insertion state, the rear claw portion 390 contacts the body-side claw portion 290 at three places to prevent erroneous insertion.

  As shown in FIG. 19, in the case of the third misinsertion state, the rear fourth claw 390d hits the body-side first claw 290a at the portion denoted by reference numeral γ8, and the body-side second insertion / extraction portion 280b. Cannot insert. In addition, the rear first claw portion 390a comes into contact with the body-side third claw portion 290c at the portion indicated by reference numeral γ9, and cannot be inserted into the body-side first insertion / extraction portion 280a. In this manner, in the third erroneous insertion state, the rear claw 390 abuts on the body-side claw 290 at two places to prevent erroneous insertion.

  As shown in FIG. 20, in the case of the fourth incorrect insertion state, the rear first claw portion 390a has a portion indicated by reference numeral γ10 on the body-side first claw portion 290a, and has a γ11 on the body-side second claw portion 290b. The portion shown in the figure hits, and cannot be inserted into the second insertion / extraction portion 280b on the body side. Also, the portion indicated by reference numeral γ12 of the rear third claw portion 390c hits the body-side third claw portion 290c, and cannot be inserted into the body-side fourth insertion / extraction portion 280d. As described above, in the fourth incorrect insertion state, the rear claw portion 390 contacts the body-side claw portion 290 at three places to prevent erroneous insertion.

  As described above, in the erroneous insertion state other than the insertion position, the rear claw portion 390 abuts on the body side claw portion 290 at at least two places. Insertion into 280 is prohibited. Therefore, even if the teleconverter 3 is mounted on the camera body 2 at the erroneous insertion position, the erroneous insertion can be reliably prevented by the contact between the claws at least at two places.

  In the first to fourth erroneous insertion states, one of the two or more contact points is located above the image sensor 270. That is, at the erroneous insertion position, one of the rear first claw 390a to the rear third claw 390c abuts on the end of the body-side first claw 290a on the front end side in the mounting direction 44, and the rear second claw 390a contacts the rear second claw 390c. This prevents the rear claw portion 390 other than the claw portion 390b from being inserted into the second body insertion / extraction portion 280b. As described above, the body-side terminal holding section 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 above the body-side terminal holding portion 220, and the body-side first claw portion 290a has the longest circumferential length of the four body-side claw portions 290. A body-side second insertion / extraction portion 280b is provided above the body-side terminal holding portion 220, and the body-side second insertion / extraction portion 280b is the shortest of the four body-side insertion / extraction portions 280. Therefore, only the rear second claw portion 390b is inserted into the body-side second insertion / extraction portion 280b at the regular insertion position, and the other rear first claw portions 390a to 390b are inserted into the body-side second insertion / extraction portion 280b. The rear third claw portion 390c is not erroneously inserted. Further, the rear first claw portion 390a to the rear third claw portion 390c do not enter the body-side second insertion / extraction portion 280b while being inclined (in a direction intersecting the optical axis O direction). This prevents the rear claw portions 390a to 390c from hitting the body-side terminal holding portion 220 and damaging the body-side terminals in an erroneous insertion state.

  Further, the body-side first claw portion 290a prevents one of the rear claw portions 390 from hitting in the erroneous insertion state to prevent erroneous insertion, but the body-side first claw portion 290a has four rear-side claw portions 390. Among them, the length in the circumferential direction is longest and the durability is high, so that the possibility that the body-side first claw portion 290a is damaged at the time of erroneous insertion can be reduced. In the second to fourth erroneous insertion states, at least one of the contact points is located at a position facing the body-side terminal holding section 220 with the optical axis O interposed therebetween. That is, one of the contact points is near the body-side terminal holding portion 220 and above the second body-side straight line B2 passing through the optical axis O, and one of the contact points is located on the body side passing through the optical axis O. It is below the second straight line B2. Accordingly, in the second to fourth erroneous insertion states, there are two or three contact points, but the contact points are respectively above and below the body-side second straight line B2 passing through the optical axis O, so that the possibility of erroneous insertion is low. can do. In the second to fourth erroneous insertion states, at least two of the abutting portions in the circumferential direction can be secured to be larger than about 120 degrees. The claw portion 390a to the rear third claw portion 390c are not inclined to enter.

  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 rear terminal holding section 320. That is, at the erroneous insertion position, one of the body-side first to fourth claw portions 290a to 290d abuts on the end of the rear first claw portion 390a on the front end side in the mounting direction 44. Therefore, the other body-side second to fourth claw portions 290b to 290d are prevented from being erroneously inserted into the rear second insertion / extraction portion 380b. As described above, the upper end of the rear terminal holding portion 320 has the end on the tip end side in the mounting direction 44 of the rear first claw portion 390a. This prevents the rear first claw portion 390a 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 rear terminal holding portion 320 to damage the rear terminal. are doing. In addition, the rear first claw portion 390a hits one of the body side claw portions 290 in the erroneous insertion state to prevent erroneous insertion, but the rear first claw portion 390a is one of the four rear claw portions 390. Second, since the length in the circumferential direction is long and the resistance is relatively high, the possibility that the rear first claw portion 390a is damaged at the time of erroneous insertion can be reduced.

Here, as shown in FIG. 13, the rear second claw portion 390b is disposed at the insertion position after passing through the body-side second insertion / extraction portion 280b, and faces the body-side second claw portion 290b at the mounting position. The angle α6 (FIG. 7) of the rear second claw portion 390b is smaller than the angle β2 (FIG. 4) of the body-side second insertion / extraction portion 280b. The angle β2 of the body-side second insertion / extraction portion 280b is smaller than the first angle from the insertion position to the mounting position. Therefore, by making the rear second claw portion 390b smaller than the first angle, the body-side second insertion / removal portion 280b is made smaller and the rear claw portion other than the rear second claw portion 390b is incorrectly inserted. 390 can be prevented from passing through. In particular, in the second to fourth erroneous insertion states in which the rear claw portion 390 and the body side claw portion 290 abut on two or three positions, other than the rear second claw portion 390b The other rear claw portions 390a, 390c, and 390d can be prevented from passing through the second body 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 rear claw portions 390a, 390c, and 309d are prevented from passing therethrough, so that the other It is also possible to prevent the rear claw portion 390 and the cylindrical portion 312 from hitting the body side terminal holding portion 220 and damaging the body side terminal.
The angle α6 of the rear second claw 390b may be smaller than the angles α5, α7, and α8 of the rear first claw 390a, the rear third claw 390c, and the rear fourth claw 390d. The angle β2 of the body-side second insertion / extraction portion 280b may be smaller than the angles α5, α7, and α8 of the rear first claw 390a, the rear third claw 390c, and the rear fourth claw 390d.

(How to attach the compatible lens 5 to the teleconverter 3 etc.)
Next, a method of attaching the corresponding lens 5 to the teleconverter 3 will be described with reference to FIGS. FIG. 21 and FIG. 22 are views showing the positional relationship between the front claw 490 of the teleconverter 3 and the lens claw 590 of the corresponding lens 5 so that the abutting state of the claw can be understood. . FIGS. 21 and 22 are views of the front mount 410 and the corresponding mount 510 viewed from the image sensor 270 side toward the subject side (viewed in the −Z direction). Is inverted.

  When attaching the corresponding lens 5 to the teleconverter 3, first, the index (not shown) attached to the outer peripheral surface of the corresponding lens 5 and the index (not shown) attached to the outer surface of the teleconverter 3 are aligned. With the front mount 410 and the corresponding mount 510 facing each other, each lens-side claw portion 590 is inserted into each front-side insertion / extraction section 480. That is, as shown in FIG. 21, the lens-side first claw portion 590a is inserted into the front-side first insertion / extraction portion 480a, the lens-side second claw portion 590b is inserted into the front-side second insertion / extraction portion 480b, and the lens-side third claw portion is inserted. The portion 590c is inserted into the front third insertion / extraction portion 480c, the fourth lens-side claw portion 590d is inserted into the front fourth insertion / extraction portion 480d, and the fifth lens-side claw portion 590e is inserted into the front fifth insertion / extraction portion 480e. At this time, the front first claw portion 490a is inserted into the lens side second insertion / extraction portion 580b, the front second claw portion 490b is inserted into the lens side third insertion / extraction portion 580c, and the protrusion 415 is inserted into the lens side fourth insertion / extraction portion 580d. The front third claw portion 490c is inserted into the fifth lens insertion / extraction portion 580e, and the front fourth claw portion 490d is inserted into the first lens insertion / extraction portion 580a. The position of the corresponding lens 5 with respect to the teleconverter 3 at this time is called an insertion position.

From the insertion position, the corresponding lens 5 is rotated in the mounting direction 44 shown in FIG. The mounting direction 44 and the mounting angle (first angle) are the same as when the teleconverter 3 is mounted on the camera body 2. As the corresponding lens 5 rotates, each front claw 490 and each leaf spring 413 enter each space between each lens claw 590 and the reference surface 511. At this time, the lens-side terminal group comes into contact with the front-side terminal group in order and is electrically connected.
FIG. 22 is a diagram in which the corresponding lens 5 is rotated by a first angle in the mounting direction 44 with respect to the teleconverter 3 from the insertion position in FIG. 21, and shows a state where the mounting of the corresponding lens 5 to the teleconverter 3 is completed. The position of the corresponding lens 5 at this time is called a mounting position. In the mounting completed state, the lens-side third claw 590c is not opposed to the front third claw 490c.

  At the mounting position, the lock pin 414 of the teleconverter 3 is pushed in the −Z direction and enters the lock pin receiving portion 514 of the corresponding lens 5. When the lock pin 414 enters the lock pin receiving portion 514, the corresponding lens 5 regulates the rotation of the teleconverter 3 for removal. That is, when each front claw 490 and each lens claw 590 reach the mounting position, the relative position in the circumferential direction between the front mount 410 and the corresponding mount 510 is determined.

  Further, the lens-side claw portion 590 is pushed toward the image sensor 270 (+ Z direction) by the leaf spring 413, and the reference surface 511 of the corresponding mount 510 contacts the reference surface 411 of the front mount 410. When the corresponding mount 510 is in surface contact with the front mount 410 and is urged by the leaf spring 413, the corresponding lens 5 and the teleconverter 3 are firmly mounted.

  The state from the insertion position in FIG. 21 to the mounting position in FIG. 22 is referred to as a mounting state. The −Z direction end of the lock pin 414 of the teleconverter 3 contacts the lock pin sliding surface 509 of the corresponding mount 510 during the mounting state. As the corresponding lens 5 rotates, the −Z direction end of the lock pin 414 slides on the lock pin sliding surface 509 of the corresponding lens 5. Therefore, the fixing screw for fixing the corresponding mount 510 is not arranged in the first angle range in the direction opposite to the mounting direction 44 from the lock pin receiving portion 514 of the lock pin sliding surface 509. By not arranging the fixing screw in the first angle range in the opposite direction, the end of the lock pin 414 in the -Z direction does not hit the fixing screw when sliding on the lock pin sliding surface 509, so that the lock pin 414 smoothly moves. The corresponding lens 5 can be attached and detached.

(How to remove the corresponding lens 5 from the teleconverter 3, etc.)
The method of removing the corresponding lens 5 from the teleconverter 3 is substantially the same as the method of removing the teleconverter 3 from the camera body 2. The user presses a lock release button (not shown) of the teleconverter 3, rotates the corresponding lens 5 with respect to the teleconverter 3 in the detaching direction, and relatively rotates the lens 5 from the mounting position to the insertion position.
The over-rotation state in the mounting direction when the corresponding lens 5 is mounted on the teleconverter 3 is substantially the same as the over-rotation state in the mounting method when mounting the teleconverter 3 on the camera body 2. The restriction pin of the corresponding lens 5 abuts on the rear end of the front fourth fourth claw portion 490d in the mounting direction 44 to prevent the corresponding lens 5 from further rotating with respect to the teleconverter 3.
The over-rotation state in the detaching direction when removing the corresponding lens 5 from the teleconverter 3 is substantially the same as the over-rotation state in the detaching direction when removing the teleconverter 3 from the camera body 2. The restriction pin of the corresponding lens 5 abuts on the front end of the third claw portion 490c in the mounting direction 44 to prevent the corresponding lens 5 from rotating further in the detaching direction with respect to the teleconverter 3.

(Explanation of erroneous insertion of corresponding lens 5 into teleconverter 3)
Next, an erroneous insertion state in which the user attempts to insert the corresponding lens 5 into the teleconverter 3 at an incorrect position without matching the index of the corresponding lens 5 with the index of the teleconverter 3 will be described. In the erroneous insertion state, the lens side claw portion 590 does not pass through the front insertion / extraction portion 480.
FIG. 23 to FIG. 27 are diagrams in which a contact point between the front claw 490 or the protrusion 415 and the lens claw 590 in the erroneous insertion state is indicated by a dotted line. FIG. 23 shows a state (fifth erroneous insertion state) in which the angle of the insertion position in FIG. FIG. 24 shows a state in which the fifth erroneous insertion state is shifted by about 10 degrees in a direction opposite to the mounting direction 44 (sixth erroneous insertion state). FIG. 25 shows a state in which it is shifted from the sixth erroneous insertion state by about 10 degrees in the direction opposite to the mounting direction 44 (seventh erroneous insertion state). FIG. 26 shows a state in which the seventh erroneous insertion state is shifted by about 70 degrees in the direction opposite to the mounting direction 44 (eighth erroneous insertion state). FIG. 27 shows a state where the erroneous insertion state is shifted from the eighth erroneous insertion state by about 5 degrees in a direction opposite to the mounting direction 44 (a ninth erroneous insertion state). In the fifth to ninth erroneous insertion states, the lens-side claw portion 590 abuts the front-side claw portion 490 or the protrusion 415 at at least three places (γ20, γ21), thereby preventing erroneous insertion. In the erroneous insertion state, the number of contact portions between the lens-side claw portion 590 and the front-side claw portion 490 or the protrusion 415 is smaller than the number of contact portions between the rear-side claw portion 390 and the body-side claw portion 290 because of the presence of the protrusion 415. More.
As described above, in the erroneous insertion state, the lens-side claw portion 590 abuts on the front-side claw portion 490 in at least three places, so that the lens-side claw portion 590 can be inserted into the front-side insertion / extraction portion 480 other than at the insertion position. It is forbidden. Therefore, even if it is attempted to mount the corresponding lens 5 on the teleconverter 3 at the erroneous insertion position, the erroneous insertion can be reliably prevented by the contact between the claws at least at three places.

  In the erroneous insertion state, one of the contact points is located on the subject side (−Z direction) with respect to the front terminal holding section 220 and on the outer peripheral side. That is, at the erroneous insertion position, the lens-side claw portion 590 is attached to at least one of the end of the front first claw portion 490a on the front end side in the mounting direction 44 or the front second claw portion 490b on the rear end side of the mounting direction 44. Either of them abuts to prevent the lens-side claw portions 580 other than the lens-side second claw portions 590b from being inserted into the front-side second insertion / extraction portion 480b, thereby protecting the front-side terminal holding portion 220. Further, in the erroneous insertion state, any one of the lens-side claws 580 other than the lens-side second claw 590b abuts on the front-side first claw 490a, but the front-side first claw 490a has four lens-side claws 490. Among them, the length in the circumferential direction is longest and the durability is high, so that the possibility that the front first claw portion 490a is damaged at the time of erroneous insertion can be reduced.

  In the erroneous insertion state, at least one of the contact points is located at a position facing the front terminal holding section 220 with the optical axis O interposed therebetween. That is, one of the contact points is above the front second straight line B2, and one of the contact points is below the front second straight line B2 passing through the optical axis O. Therefore, in the second to fourth erroneous insertion states, there are two or three contact points, but the contact points are respectively above and below the sixth telescopic side straight line B6 passing through the optical axis O, so that the possibility of erroneous insertion is low. can do. Further, in the erroneous insertion state, at least two circumferential intervals of the abutting portions can be secured to be larger than about 120 degrees, and the lens other than the lens-side second claw portion 590b is attached to the front second insertion / extraction portion 480b at the time of erroneous insertion. Neither of the side claws 580 is inclined to enter.

  In the erroneous insertion state, one of the abutting portions is in contact with the lens-side first claw portion 590a located on the outer peripheral side of the lens-side terminal holding portion 520, and the lens-side claw other than the lens-side first claw portion 590a. The portion 590 is prevented from being inserted and hitting the lens-side terminal holding portion 520. Further, the lens-side first claw portion 590a hits one of the front-side claw portions 490 in the erroneous insertion state to prevent erroneous insertion, but the lens-side first claw portion 590a is one of the five lens-side claw portions 590. Second, since the length in the circumferential direction is long and the resistance is relatively high, the possibility that the first claw portion 590a on the lens side will be damaged when erroneously inserted can be reduced.

  Here, as shown in FIG. 21, the lens-side second claw portion 590b passes through the front-side second insertion / extraction portion 480b, is arranged at the insertion position, and faces the front-side second claw portion 490b at the mounting position. The angle α14 (FIG. 11) of the second claw portion 590b on the lens side is smaller than the angle β10 (FIG. 10) of the second insertion / extraction portion 480b on the front side. The angle β10 of the front second insertion / extraction portion 480b is smaller than the first angle from the insertion position to the mounting position. Therefore, by making the lens-side second claw portion 590b smaller than the first angle, the front-side second insertion / removal portion 480b is made smaller and the other lens-side claw portion 590 other than the lens-side second claw portion 590b is incorrectly inserted. Can be prevented from passing through. In particular, in an erroneous insertion state in which the contact portion between the lens-side claw portion 590 and the front-side claw portion 490 becomes three, the lens-side claw portions 590 other than the lens-side second claw portion 590b connect the front-side second insertion / extraction portion 480b. Passing can be prevented. Since the front terminal holding portion 420 is arranged on the inner diameter side of the front second insertion / extraction portion 490b, the other lens side claw portion 590 is prevented by preventing the other lens side claw portion 590 from passing therethrough. It is also possible to prevent the cylindrical portion 512 from hitting the front terminal holding portion 420 and damaging the front terminal.

(Method of preventing non-compatible lens 6 from being attached to teleconverter 3)
Next, a method of preventing the non-compliant lens 6 from being mounted on the teleconverter 3 will be described. The non-compatible mount 610 has substantially the same shape as the rear mount 310, and when the non-compatible lens 6 is inserted into the teleconverter 3 at the insertion position, the projection 415 hits the third lens side claw of the non-compatible mount 610. Touching and preventing insertion.

(How to attach compatible lens 5 or non-compatible lens 6 to camera body 2)
The mounting of the corresponding lens 5 or the non-compatible lens 6 on the camera body 2 is the same as the mounting of the teleconverter 3 on the camera body 2. The corresponding mount 510 or the non-compatible mount 610 is attached to the body side mount 210. Since the body-side mount 210 has no protrusion 415, the third lens-side claw 590c and the fourth lens-side claw 590d of the corresponding mount 510 can be inserted into the third body-side insertion / extraction portion 280c of the body-side mount 210. . Further, when the corresponding mount 510 is inserted into the body-side mount 210, the erroneous insertion is prevented at at least two places of γ20 shown in FIGS.

  According to the above-described embodiment, the teleconverter 3, the compatible lens 5, and the non-compatible lens 6 can be mounted on the camera body 2 in a properly usable state. In particular, when the teleconverter 3, the compatible lens 5, or the non-compatible lens 6 is attached to the camera body 2, the four claw portions 390, 590 are moved in the + Z direction from the respective leaf springs 213 of the four body side claw portions 290. Pressed. In other words, even when the camera system 1 receives an impact, since there are four projecting portions (the rear claw portion 390, the lens-side claw portion 490, and the body-side claw portion 290), the impact resistance is high.

  Further, when the teleconverter 3, the compatible lens 5, and the non-compatible lens 6 are attached to the camera body 2, communication, power supply, and control can be performed through the respective terminals, so that the camera system 1 can be used properly. it can.

  The four projections of the teleconverter 3, the corresponding lens 5, or the non-compatible lens 6 are arranged on a straight line that intersects at about 45 degrees on the optical axis O with respect to a straight line connecting the center of the contact holding portion and the optical axis O. Then, four leaf springs 213 arranged around the optical axis O at intervals of approximately 90 degrees are brought into contact with each other to face the four projections of the camera body 2. Thereby, the shock resistance is high regardless of whether the camera system 1 is held in the horizontal position or the vertical position. In particular, even if the teleconverter 3, the corresponding lens 5, the non-compatible lens 6, or the camera body 2 receives a vertical shock, straight lines (B1, L1, B5) connecting the center of the contact holding portion and the optical axis O are provided. , L5), two projections are arranged on each of the right and left sides, so that a vertical impact can be received by two or more projections.

  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 positioned 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 of the four body-side claw portions 290, and the angle α2 of the body-side second claw portion 290b is of the four body-side claw portions 290. The smallest angle (fourth largest). The angle α1 of the body-side first claw portion 290a is the largest of the four body-side claw portions 290, and the angle α3 of the body-side third claw portion 290c is the second of the four body-side claw portions. Is big.

  Therefore, when any one of the teleconverter 3, the corresponding lens 5, the non-compatible lens 6, and the camera body 2 receives an impact in the vertical direction, the upper two protrusions (the body-side first claw 290a and the body-side second claw 290a). The force applied to the combination of the claw portions 290b) and the combination of the two lower projecting portions (the fourth body-side fourth claw portion 290d and the third body-side claw portion 290c) is substantially equal. Even when an impact is applied in the left-right direction, the combination of the two left protrusions (the body-side third claw 290c and the body-side second claw 290b) and the right two protrusions (the body-side third claw 290c). The force applied to the combination of the one claw portion 290a and the body-side fourth claw portion 290d) is substantially equal.

  The rear first claw portion 390a and the rear third claw portion 390c are arranged on the teleconverter-side third straight line L3, and the rear second claw portion 390b and the rear fourth claw portion on the teleconverter-side fourth straight line L4. 390d. Here, the angle α8 of the rear fourth claw 390d is the third largest of the four rear claws 390, and the angle α6 of the rear second claw 390b is the fourth largest of the four rear claws 390. The smallest angle (fourth largest). The angle α5 of the rear first claw 390a is the second largest of the four rear claws, and the angle α7 of the rear third claw 390c is the largest angle of the four rear claws. large.

  Therefore, when any one of the teleconverter 3, the corresponding lens 5, the non-compatible lens 6, and the camera body 2 receives a vertical impact, the upper two protrusions (the rear first claw 390a and the rear second claw 390a). The force applied to the combination of the claw portions 390b) and the combination of the two lower protruding portions (the rear fourth claw portion 390d and the rear third claw portion 390c) is substantially equal. Even when an impact is applied in the left-right direction, the combination of the two left protrusions (the first rear claw 390a and the fourth back claw 390d) and the two right protrusions (the rear The force applied to the combination of the three claw portions 390c and the rear second claw portions 390b) becomes substantially equal.

  In the present embodiment, the angle of the rear third claw portion 390c is larger between the rear first claw portion 390a and the rear third claw portion 390c arranged on the third straight line L3 on the teleconverter side. The rear fourth claw portion 390d has a larger angle between the rear second claw portion 390b and the rear fourth claw portion 390d arranged on the side fourth straight line 14. That is, the two rear claw portions 390 opposed to each other with the optical axis O interposed therebetween are larger in two rear claw portions 390 below the second teleconverter-side straight line L2 (in the horizontal direction). Therefore, in a state where the camera system is held in the horizontal position, two impacts of the rear claw 390 having a large angle below the second straight line L2 on the teleconverter side are applied to the interchangeable lens 3 from below in a large area. Can receive. Also, when the interchangeable lens 3 receives an impact from below while the camera system 1 is held in the horizontal position, the rear claw 390 below the second teleconverter-side straight line L2 is attached to the body-side claw 290. It receives an impact in the approaching direction (-Z direction). Here, the leaf spring 213 presses the rear claw 390 in a direction away from the body claw 290 (+ Z direction). Therefore, even if the interchangeable lens 3 is subjected to a downward impact while the camera system 1 is held in the horizontal position, the rear claw portion 390 below the teleconverter-side second straight line L2 has a large area. In addition, since the impact can be absorbed by the urging force of the leaf spring 213 of the body-side claw portion 290 facing each other, the impact resistance is high.

  When the corresponding lens 5 and the like are mounted on the camera body 2, the body-side terminal holding unit 220 is arranged above the image sensor 270. With the camera system 1 held in the horizontal position, the sunlight that enters the corresponding lens 5 or the like enters the lower side on the emission side of the corresponding lens 5 or the like. In the present embodiment, the ghost can be suppressed because the body-side terminal holding section 220 is arranged not on the lower side of the image sensor 270 but on the upper side.

The four leaf springs 213 are arranged around the optical axis O at approximately 90-degree intervals. Accordingly, at least two leaf springs 213 of the four leaf springs 213 are in contact with the two protrusions with the optical axis O interposed therebetween, and the two protrusions are pressed in the + Z direction. In this embodiment, the teleconverter 3, the corresponding lens 5, or the non-compatible lens 6 has at least four protrusions. However, even if one of the four protrusions is damaged, at least two protrusions are provided. Are disposed at positions opposing each other with the optical axis O interposed therebetween, and thus are pressed by the two leaf springs 213 disposed at positions opposing each other with the optical axis O interposed therebetween. Therefore, it is possible to provide the camera system 1 in which the teleconverter 3, the corresponding lens 5, or the non-compatible lens 6 can be mounted on the camera body 2 in a usable state even if the protrusion is broken.
Further, since the leaf spring 213 is on the straight line B10 (FIG. 5), the lens-side terminal near the straight line B10 can be strongly pressed against the body-side terminal.

  The screws 313 and 513 are arranged on the outer periphery on the rear end side in the mounting direction 44 of the claw portion. At least a part of the screws 313, 513 is arranged on the outer periphery of the claw portion. In the present embodiment, even when an external force is received at the time of mounting, the four claws can receive the external force. In addition, since at least a part of the screws 313 and 513 is arranged on the outer peripheral side of the claw portion, when an external force is transmitted between the rear mount 310, the corresponding mount 510, and the fixing member in the corresponding lens, the four claw portions are used. And the four screws 313 and 513, respectively, to prevent the external force from being concentrated on a specific location. Since the concentration of external force can be prevented, the fixing member and the rear mount 310 and the corresponding mount 510 can be firmly fixed. If the inner diameters of the rear mount 310 and the corresponding mount 510 increase, the diameters of the reference surfaces 311 and 511 and the protrusion amount of the claw portion need to be increased by proportional expansion. The external force can be received by the part and the four screws 313 and 513. Therefore, according to the present embodiment, even if the inner diameters of the rear mount 310 and the corresponding mount 510 increase, the diameters of the reference surfaces 311 and 511 and the protrusion amount of the claw portions do not need to be proportionally increased. It is possible to avoid an increase in the size of the incompatible lens 6, the camera body 2, and the teleconverter 3.

The following modifications are also possible, and one or more modifications can be combined with the above-described embodiment.
(Modification 1)
The smallest claw portion of the corresponding mount 510 can be omitted. As shown in FIG. 28, the second mount 710 in which the lens-side fifth claw portion 590e of the corresponding mount 510 is omitted includes a lens-side first claw portion 790a to a lens-side fourth claw portion 790d and a lens-side first insertion / extraction portion 780a. To a lens-side fourth insertion / extraction portion 780d. The lens-side first claw 790a to the lens-side fourth claw 790d are the lens first claw 590a, the lens-side second claw 590b, the lens-side fourth claw 590d, and the lens-side fifth claw of the corresponding mount 510. 590e. The lens side first insertion / extraction portion 780a, the lens side second insertion / extraction portion 780b, and the lens side fourth insertion / extraction portion 780d are the lens side first insertion / extraction portion 580a, the lens side second insertion / extraction portion 580b, and the lens side fifth insertion / extraction of the corresponding mount 510. It is substantially equivalent to the part 580e. The circumferential length of the lens-side third insertion / extraction portion 780c is the circumferential length of each of the lens-side third insertion / extraction portion 580c, the lens-side third claw portion 590c, and the lens-side fourth insertion / extraction portion 580d of the corresponding mount 510. It is the added length. The second mount 710 can be attached to both the camera body 2 and the teleconverter 3. In a state where the second mount 710 is mounted on the camera body 2 or the teleconverter 3, at least a part of the lens-side first claw 790a to the lens-side fourth claw 790d is urged by the leaf springs 213 and 413. , Mounting is stable.

(Modification 2)
The lens-side fourth insertion / extraction portion 580d of the corresponding mount 510 can be appropriately changed as long as the shape allows the projection 415 to pass therethrough. As shown in FIG. 29, the third mount 810 includes a first claw portion 890a on the lens side, a fourth claw portion 890d on the lens side, and a first insertion / extraction portion 880a on the lens side to a fifth insertion / extraction portion 880e on the lens side. The lens-side first claw 890a, the lens-side second claw 890b, and the lens-side fifth claw 890d are the lens first claw 590a, the lens-side second claw 590b, and the lens-side fifth claw of the corresponding mount 510. 580e. The first lens-side insertion / extraction portion 880a to the third lens-side insertion / extraction portion 880c and the fifth lens-side insertion / extraction portion 880e correspond to the first lens-side insertion / extraction portion 580a to the third lens-side insertion / extraction portion 580c of the corresponding mount 510 and the fifth lens-side insertion / extraction It is substantially equivalent to the part 580e. The lens-side third claw 890c is formed by connecting the lens-side third claw 590c and the lens-side fourth claw 590d of the corresponding mount 510 along the cylindrical portion 512. The lens-side fourth insertion / extraction portion 880d has a shape that allows the projection 415 to pass therethrough. The third mount 810 can be attached to both the camera body 2 and the teleconverter 3. Further, when the third mount 810 is mounted on the camera body 2 or the teleconverter 3, at least a part of the first claw portion 890a on the lens side to the fourth claw portion 890d on the lens side is urged by the leaf springs 213 and 413. , Mounting is stable.

(Modification 3)
A part of the claw portions 590, 390 of the corresponding mount 510 or the rear mount 310 may be cut out. There is no particular limitation on the shape or position of the cutout, but a position where no urging force is applied from the leaf springs 213 and 413 at the time of mounting is preferable. As shown in FIG. 30, the fourth mount 910 includes a first claw portion 990a on the lens side to a fourth claw portion 990d on the lens side, a first insertion / extraction portion 980a on the lens side, a fourth insertion / extraction portion 980d on the lens side, and a notch 991. The lens-side first claw 990a to the lens-side third claw 990c are substantially equivalent to the rear first claw 390a to the rear third claw 390c of the rear mount 310. The lens side first insertion / extraction portion 980a to the lens side fourth insertion / extraction portion 980d are substantially equivalent to the rear first insertion / extraction portion 380a to the rear fourth insertion / extraction portion 380d of the rear mount 310. The lens-side fourth claw portion 990d is provided with a notch 991 from the inner circumference to the outer circumference. The circumferential length of the lens-side fourth claw 990d is substantially the same as the circumferential length of the rear fourth claw 390d of the rear mount 310. In a state where the fourth mount 910 is mounted on the camera body 2, at least a part of the lens-side first claw 990a to the lens-side fourth claw 990d is urged by the leaf spring 213, and the mounting is stabilized. The notch 991 does not receive the urging force from the leaf spring 213. That is, one circumferential direction of the lens-side fourth claw portion 990d receives the urging force from the leaf spring 213, and the other circumferential direction of the lens-side fourth claw portion 990d does not receive the urging force from the leaf spring 213. Here, the lens-side fourth claw portion 990d is divided into two in the circumferential direction by the notch 991, but when the lens-side fourth claw portion 990d is mounted on the camera body 2, the circumferential-side notch 991 of the lens-side fourth claw portion 990d is cut off. The regions on both sides face the body-side fourth claw portion 290d or the front-side fourth claw portion 490d. In this way, a region facing one body-side claw in the mounted state is defined as one lens-side claw.
Note that the notch 991 may be cut out so as to divide the claw portion into two or more in the circumferential direction, or may be cut out so as to cut out a part of the claw portion, and the diameter of at least a portion of the claw portion may be reduced. It may be cut out so as to shorten the length in the direction. Further, the claw portion may be partially cut out on a straight line at 45 degrees from the straight line passing through the optical axis O and the center of the terminal holding portion (on the straight lines L3, L4, L7, L8).

(Modification 4)
Although the rear mount 310 is substantially equivalent to the non-compliant mount 610, the rear mount 310 may be substantially equivalent to the corresponding mount 510. A teleconverter that makes the rear mount 310 substantially equivalent to the corresponding mount 510 can be mounted on the camera body 2 or the teleconverter 3.

(Modification 5)
One of the four lens-side claws 590 may be omitted, and three lens-side claws may be provided. Even with three lens-side claws, since the leaf springs 213 of the camera body 2 are arranged at 90-degree intervals around the optical axis O, the lens-side claws can be pressed from at least three leaf springs 213 and used. It can be installed in any state.

  A configuration in which two of the four lens-side claws 590 facing each other with the optical axis O interposed therebetween are removed and two lens-side claws facing each other with the optical axis O interposed therebetween may be provided. Even the two lens-side claws face each other with the optical axis O interposed therebetween, and since the leaf springs of the camera body 2 are arranged at intervals of 90 degrees around the optical axis, they face each other with at least the optical axis O interposed therebetween. The lens-side claw portion is pressed from the leaf spring 213 to be used and can be mounted in a usable state. When two lens-side claws are provided to face each other with the optical axis O interposed therebetween, one of the two lens-side claws is arranged at a position close to the center of the lens-side terminal holding portion 520. Is preferred. By arranging the lens claw portion near the center of the lens-side terminal holding portion 520 and making it contact with the leaf spring 213, the lens-side terminal and the body-side terminal are brought into contact with each other, so that the camera system 1 can be used properly. it can.

  The material of the corresponding mount 510 is not particularly limited, and may be metal or resin. At least a part of the end of the corresponding mount 510 (the outer end of the lens-side claw 590, the end of the lens-side claw 590 in the circumferential direction, the end of the cylindrical portion 512 in the optical axis O direction) is inclined. May be formed. The end of the corresponding mount 510 does not have to be inclined, and may have a step.

The shape of the lens-side terminal holding portion 520 is not particularly limited, and can be appropriately changed. In particular, by inclining the circumferential end of the lens-side terminal holding section 520, the contact with the body-side terminal holding section 220 when rotating from the insertion position to the mounting position can be performed smoothly.
Although the lens-side terminal holding portion 520 has a plurality of lens-side terminals arranged in an arc shape, the position of the lens-side terminal is limited within a range that comes into contact with the body-side terminal when the interchangeable lens 3 is mounted on the camera body 2. May be shifted.

  The center position and length in the circumferential direction of the lens-side claw portion 590 can be appropriately changed within a range where the lens-side claw portion 590 is pressed from the leaf spring 213 at the mounting position. The center position of the lens-side claw portion 590 in the circumferential direction may be different from the center position of the biased portion in the circumferential direction. That is, the position where the lens-side claw portion 590 is pressed from the center position of the leaf spring 213 in the circumferential direction may be a position different from the center position of the lens-side claw portion 590 in the circumferential direction. Similarly, the center position of the lens-side claw portion 590 in the circumferential direction and the center position of the body-side claw portion 290 in the circumferential direction do not need to match at the mounting position. The circumferential length of the lens-side claw 590 and the corresponding length of the body-side claw 290 in the circumferential direction do not have to match.

  Lens claws 590 other than the rear claw 390 or the third lens claw 590c are in contact with the leaf springs 213 and 413 and are urged away from the body claw 290 or the front claw 490. It has an energized part as a part. The shape of the biased portion may be any shape as long as it can receive a sufficient biasing force from the leaf springs 213, 413. The contact between the leaf springs 213, 413 and the biased portion may be any of point contact, line contact, and surface contact. Good. The shapes and materials of the leaf springs 213 and 413 are not particularly limited as long as the opposing claw portions can be pressed sufficiently. In addition, one or two leaf springs 213 and 413 and the claw portions facing them only need to face each other at least at the time of completion of mounting, and do not always need to be in constant contact. For example, when the camera system 1 receives an external force, the leaf springs 213 and 413 and the claw portions may be in a non-contact state. The urging force received by the claw portions from the leaf springs 213 and 413 does not need to be always constant, and may be changed according to the external force received by the camera system 1.

The claw portions facing each other at the time of mounting do not need to have the same circumferential length, and the circumferential length of the lens-side claw portions 590 other than the rear-side claw portion 390 or the third lens-side claw portion 590c is , Can be changed as long as the leaf spring 213 can be pressed. In addition, it is not necessary that the entire surface of one claw and the entire surface of the other claw are opposed to each other during mounting, and the position of the circumferential end of one claw is different from the position of the circumferential end of the other claw. May be.
Also, the claw portion and the corresponding insertion / extraction portion do not need to have substantially the same circumferential length, and the claw portion to be inserted has a circumferential length that is longer than the perimeter length of the insertion / extraction portion. And less than that.

In addition, the circumferential length of the rear first claw portion 390a may be changed within a range in which the rear first claw portion 390a passes through the corresponding body-side first insertion / extraction portion 280a at the time of insertion. The same applies to the rear second claw portion 390b, the rear third claw portion 390c, and the rear fourth claw portion 390d.
Furthermore, the thickness of the cylindrical portion 312 in the radial direction can be changed as appropriate, and the cylindrical portion 312 of the present embodiment may have a shape that at least partially protrudes toward the inner diameter side.

  In the present embodiment, the teleconverter 3 has been described as an example of the intermediate accessory, but the intermediate accessory may be an adapter, a close-up ring, or the like.

  Although various embodiments and modified examples have been described above, the present invention is not limited to these contents. Other embodiments that can be considered within the scope of the technical concept of the present invention are also included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Camera system, 2 ... Camera body, 3 ... Teleconverter, 5 ... Compatible lens, 6 ... Non-compliant lens, 44 ... Mounting direction, 210 ... Body side mount, 211, 311, 411, 511 ... Reference plane, 212, 412: Opening, 213, 413: Leaf spring, 220: Body side terminal holding part, 270: Image sensor, 280: Body side insertion / extraction part, 290: Body side claw part, 310: Rear mount, 311: Reference plane, 312 , 512, cylindrical portion, 320, rear terminal holding portion, 370, lens, 380, rear insertion / extraction portion, 390, rear claw portion, 410, front mount, 415, protrusion, 420, front terminal holding portion, 480 ... Front insertion / extraction section, 490: Front claw section, 510: Corresponding mount, 520: Lens side terminal holding section, 560, 660: Imaging optical system, 580: Lens side insertion / extraction section, 590: Lens Claws, B1 to B4: Body side reference lines (first to fourth straight lines), B5 to B8: Teleconverter side reference lines, B10: Straight lines, L1 to L4: Teleconverter side reference lines (first to fourth straight lines), L5 to L8: Reference line on the lens side, O: Optical axis

The interchangeable lens according to the first aspect of the present invention, the body-side terminal comprising an imaging device subject light is incident, a plurality of body side terminal that is disposed on top of the imaging device upon holding the camera body in the horizontal position A group, an annular body-side mount disposed outside the body-side terminal group, a plurality of body-side protrusions projecting inward from the body-side mount , respectively, and an image side of the plurality of body-side protrusions. An interchangeable lens detachably mountable to a camera body, the lens including: a lens-side mount that comes into contact with the body-side mount; and the lens provided inside the interchangeable lens. a fixed member side mount is fixed, a cylindrical portion extending from the inner peripheral edge of the lens-side mount in the direction of the optical axis of the interchangeable lens, distribution inside the partial region of the cylindrical portion Is a lens-side terminal group that contacts the body-side terminal group that is biased in the optical axis direction when mounted on the camera body, projecting outwardly from said cylindrical portion, a plurality extending in the circumferential direction of the cylindrical portion Of the plurality of lens-side protrusions, only one end of each of the circumferential ends of the plurality of lens-side protrusions is located outside the partial area, and the plurality of lens-side protrusions are provided. When the interchangeable lens is mounted on the camera body, the lens-side protrusions respectively include opposing portions opposing the four elastic members, and the lens-side mount is provided with at least four screws with respect to the fixing member. The four screws are fixed, and each of the four screws is arranged on one side in the circumferential direction of the facing portion outside the facing portion of the plurality of lens-side protrusions .
An interchangeable lens according to a second aspect of the present invention is a body-side terminal including an image sensor on which subject light is incident, and a plurality of body-side terminals disposed above the image sensor when the camera body is held in a horizontal position. A group, an annular body-side mount disposed outside the body-side terminal group, a plurality of body-side protrusions projecting inward from the body-side mount, respectively, and an image side of the plurality of body-side protrusions. An interchangeable lens detachably mountable to a camera body, the lens including: a lens-side mount that comes into contact with the body-side mount; and the lens provided inside the interchangeable lens. A fixing member to which a side mount is fixed; a cylindrical portion extending in the optical axis direction of the interchangeable lens from an inner peripheral edge of the lens side mount; and a part disposed inside the cylindrical portion. A lens-side terminal group that comes into contact with the body-side terminal group that is urged in the optical axis direction when attached to the camera body; and a plurality of protrusions that protrude outward from the cylindrical portion and extend in a circumferential direction of the cylindrical portion. And the plurality of lens-side protrusions include a first lens-side protrusion and a third lens-side protrusion, and one of the ones in the circumferential direction outside the partial area. The first lens-side protruding portion of the plurality of lens-side protruding portions is disposed on the side, and the plurality of lens-side protruding portions is disposed outside the partial area and on the other side in the circumferential direction. At an insertion position where the protrusion is inserted between the corresponding plurality of body-side protrusions, the first body-side protrusion closest to the center of the body-side terminal group among the plurality of body-side protrusions is inserted and removed. A second insertion / removal unit on the lens side is disposed, and the plurality of When the interchangeable lens is mounted on the camera body, the lens-side projections each include opposing portions that oppose the four elastic members, and the lens-side mount is fixed to the fixing member by at least four screws. The four screws are fixed, and each of the four screws is arranged on one side in the circumferential direction of the facing portion outside the facing portion of the plurality of lens-side protrusions.

Claims (3)

An image sensor onto which object light is incident, a body-side terminal group arranged outside the image sensor, an annular body-side mount arranged outside the body-side terminal group, and a radial direction from the body-side mount. An interchangeable lens detachable from a camera body, comprising: a plurality of body-side protrusions respectively protruding toward the camera; and four elastic members respectively arranged on the image side of the plurality of body-side protrusions. ,
A lens-side mount that contacts the body-side mount;
A fixing member that is arranged in a direction orthogonal to the optical axis of the subject light and that fixes the lens-side mount;
A cylindrical portion extending in the optical axis direction from an inner peripheral edge of the lens-side mount;
A lens-side terminal group that is disposed inside the cylindrical portion and contacts the body-side terminal group when mounted on the camera body;
A plurality of lens-side protrusions protruding from the cylindrical portion toward the outer peripheral direction and extending in the circumferential direction of the cylindrical portion,
The plurality of lens-side protrusions include four opposing parts opposing the four elastic members when the interchangeable lens is mounted on the camera body,
The lens-side mount is fixed to the fixing member with at least four screws,
An interchangeable lens in which the four screws are arranged on the outer peripheral side of the four opposing portions and on one of the four opposing portions in the circumferential direction.   2. The interchangeable lens according to claim 1, wherein at least two of the four screws are respectively arranged on outer peripheral sides of two of the plurality of lens-side protrusions. 3. When the lens-side mount is viewed from the camera body side, the four screws are disposed at a position approximately 45 degrees from a straight line passing through the optical axis and the center of the lens-side terminal group with respect to the optical axis. The interchangeable lens according to claim 1, wherein

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