JP6521163B1 - interchangeable lens - Google Patents

Abstract

To mount an accessory on a camera body in a state where it can be used properly. A body-side mount, a plurality of body-side protrusions which respectively project inward from the body-side mount, and four elastic members respectively arranged on the image side of the plurality of body-side protrusions A lens-side mount, a fixing member to which the lens-side mount is fixed, a cylindrical portion extending in the optical axis direction from an inner peripheral edge of the lens-side mount, and a cylinder And a plurality of lens-side protrusions projecting in the circumferential direction from the cylindrical portion and extending in the circumferential direction of the cylindrical portion, the plurality of lens-side protrusions being used when the interchangeable lens is mounted on the camera body; Provided with four opposing parts opposing one elastic member, the lens side mount is fixed to the fixing member by at least four screws 513, and the four screws are on the outer peripheral side of the four opposing parts, And it is arranged on the one circumferential direction of the four opposing portion. [Selected figure] Figure 11

Description

  The present invention relates to an interchangeable lens.

  There are known accessories that can be attached to and removed from a camera body (e.g., Patent Document 1). Heretofore, it has been necessary to mount the accessory on the camera body in a properly usable state.

Unexamined-Japanese-Patent No. 8-43910

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 Group, an annular body-side mount disposed outside the body-side terminal group, a plurality of body-side protrusions that respectively protrude inward from the body-side mount, and an image-side of the plurality of body-side protrusions An interchangeable lens detachably mountable to a camera body, the lens mount mounted in contact with the body mount, and 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 A lens-side protrusion of the plurality of lens-side protrusions, wherein only one of the circumferential ends of each of the plurality of lens-side protrusions is located outside the partial region ; The lens side projecting portion respectively includes opposing portions facing the four elastic members when the interchangeable lens is mounted on the camera body, and the lens side mount with respect to the fixing member is at least four screws. The four screws are respectively disposed on one side of the facing portion in the circumferential direction outside the facing portion of the plurality of lens side protrusions .
The interchangeable lens according to the second aspect of the present invention includes a body side terminal including an imaging device on which subject light is incident, and a plurality of body side terminals disposed above the imaging device when the camera body is held in a lateral position. Group, an annular body-side mount disposed outside the body-side terminal group, a plurality of body-side protrusions that respectively protrude inward from the body-side mount, and an image-side of the plurality of body-side protrusions An interchangeable lens detachably mountable to a camera body, the lens mount mounted in contact with the body mount, and provided inside the interchangeable lens; The fixed member to which the side mount is fixed, the cylindrical portion extending in the optical axis direction of the interchangeable lens from the inner peripheral edge of the lens side mount, and the inner side of a partial region of the cylindrical portion A plurality of lens side terminals that contact the body side terminals urged in the optical axis direction when mounted on the camera body, and a plurality of members extending outward from the cylindrical portion and extending in the circumferential direction of the cylindrical portion And the plurality of lens-side protrusions include the first lens-side protrusion and the third lens-side protrusion, and the outer side of the partial region and one of the circumferential direction The first lens side protrusion of the plurality of lens side protrusions is disposed on the side, and the plurality of lenses is on the other side of the partial region and on the other side in the circumferential direction. In the insertion position where the protrusions are 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 And a plurality of lens side second insertion and removal portions are disposed. When the interchangeable lens is attached to the camera body, the lens-side protrusion includes facing portions that respectively face the four elastic members, and the lens-side mount is at least four screws with respect to the fixing member. The four screws are respectively disposed on one side of the facing portion in the circumferential direction outside the facing portion of the plurality of lens side protrusions.

It is a figure showing an outline of composition of a camera system. It is a figure showing an outline of composition of a camera system. FIG. 6 is a front view of the mount surface of the camera body as viewed from the subject side. FIG. 6 is a front view of the mount surface of the camera body as viewed from the subject side. It is the figure which looked at the mount of the camera body which removed the body side mount from the to-be-photographed object side. FIG. 6 schematically shows the rear mount of the teleconverter as viewed from the image side. FIG. 6 schematically shows the rear mount of the teleconverter as viewed 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 to-be-photographed object side. It is a figure which shows typically the front side mount of the teleconverter seen from the to-be-photographed object side. It is the model which looked at the corresponding | compatible mount of a corresponding | compatible lens from the image side. It is the model which looked at the corresponding | compatible mount of a corresponding | compatible lens from the image side. It is a front view of the body side nail | claw part in the insertion position and the lens side nail | claw part seen from the to-be-photographed object side. FIG. 10 is a front view of the body side claw portion and the lens side claw portion at the mounting position as viewed from the subject side. They are the front view and side view of the body side nail | claw part and lens side nail | claw part in the excessive rotation state of the mounting direction seen from the to-be-photographed object side. FIG. 10 is a side view of the body side claw portion and the lens side claw portion in an overrotation state in the removal direction as viewed from the subject side. It is a front view of the body side nail | claw part in the 1st misinsertion state and the back side nail | claw part seen from the to-be-photographed object side. It is a front view of the body side nail | claw part in the 2nd misinsertion state and the back side nail | claw part seen from the to-be-photographed object side. It is a front view of the body side nail | claw part in the 3rd misinsertion state and the back side nail | claw part seen from the to-be-photographed object side. It is a front view of the body side nail | claw part in the 4th misinsertion state and the back side nail | claw part seen from the to-be-photographed object side. It is a front view of the front nail part and the lens side nail part seen from the image side. It is a front view of the front nail part and the lens side nail part seen from the image side. It is a figure which shows the contact | abutting place of the front side nail | claw part or protrusion in the misinsertion state, and the lens side nail | claw part seen from the image side. It is a figure which shows the contact | abutting place of the front side nail | claw part or protrusion in the misinsertion state, and the lens side nail | claw part seen from the image side. It is a figure which shows the contact | abutting place of the front side nail | claw part or protrusion in the misinsertion state, and the lens side nail | claw part seen from the image side. It is a figure which shows the contact | abutting place of the front side nail | claw part or protrusion in the misinsertion state, and the lens side nail | claw part seen from the image side. It is a figure which shows the contact | abutting place of the front side nail | claw part or protrusion in the misinsertion state, and the lens side nail | claw part seen from the image side. It is a schematic diagram explaining the corresponding | compatible mount of the modification 1. FIG. It is a schematic diagram explaining the corresponding | compatible mount of the modification 2. FIG. It is a schematic diagram explaining the corresponding | compatible mount of the modification 3. FIG.

(Camera system 1)
1 and 2 schematically show 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 non-compliant lens 6.

  As shown in FIG. 1, the corresponding lens 5 can be attached to and detached from the camera body 2 via the 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 so-called bayonet coupling of the corresponding mount 510 of the corresponding lens 5 to the body side mount 210 of the camera body 2 mounts the corresponding lens 5 on the camera body 2. The teleconverter 3 is mounted on the camera body 2 by so-called bayonet coupling of the rear mount 310 of the teleconverter 3 to the body side mount 210 of the camera body 2. The so-called bayonet coupling of the corresponding mount 510 of the corresponding lens 5 to the front mount 410 of the teleconverter 3 makes the corresponding lens 5 mounted on the teleconverter 3.

  As shown in FIG. 2A, the non-corresponding lens 6 is removable from the camera body 2. The non-corresponding lens 6 is mounted on the camera body 2 by so-called bayonet coupling of the non-corresponding mount 610 of the non-corresponding 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-corresponding mount 610 and the corresponding mount 510 also have different shapes. Accordingly, the compliant mount 510 is removable from both the body side mount 210 and the front side mount 410, and the non-compliant mount 610 can be removable from the body side mount 210 and not attachable to the front side mount 410.

  Here, assuming that the non-compliant lens 6 is attached to the teleconverter 3, as shown in FIG. 2B, the lens on the most object side included in the non-compliant lens 6 moves in the direction of the optical axis O There is an interchangeable lens or the like that collides with the lens on the most object side of the teleconverter 3 by doing this. If a part of the interchangeable lens collides with a part of the teleconverter 3 other than the lens closest to the object side, it is preferable that the interchangeable lens be a non-corresponding lens 6. A part of the non-correspondence lens 6 does not have to collide with the teleconverter 3, and an interchangeable lens that does not need to be attached to the teleconverter 3 may be used as the non-correspondence lens 6.

(Camera body 2)
The camera body 2 includes a body side mount 210, a body side terminal holding portion 220, a body side CPU 230, a body side communication portion 240, a body side storage portion 250, a power feeding portion 260, and an imaging element 270. The body side mount 210 and the body side terminal holding portion 220 will be described in detail later.

  The body side CPU 230 is composed of a microcomputer and its peripheral circuits. The body side CPU 230 performs various controls of the camera body 2, the teleconverter 3, the corresponding lens 5 and the non-corresponding lens 6. The body side communication unit 240 performs predetermined data communication with the teleconverter 3, the corresponding lens 5, and the non-corresponding 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 non-volatile storage medium. The body side storage unit 250 is connected to the body side CPU 230. A predetermined control program or the like executed by the body CPU 230 is stored in advance in the body side storage unit 250. The body-side CPU 230 performs each control by reading a 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 corresponding lens 5, and the non-corresponding 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 imaging device 270 is, for example, a solid-state imaging device such as a CCD or a CMOS. The imaging device 270 is connected to the body CPU 230, captures an image of an object, and outputs an imaging signal. Description of processing of the output imaging signal is omitted.

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

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

  In the telecon side storage unit 340, recording and reading of data are controlled by the telecon side control / communication unit 330. The telecon-side storage unit 340 can store data (such as model name and magnification) of the teleconverter 3 in addition to storing control programs and the like executed by the telecon-side control / communication unit 330.

  The lens 370 is a teleconverter lens that enlarges the focal length of the corresponding lens 5. In the state where the teleconverter 3 is attached to the corresponding lens 5, the focal length of the corresponding lens 5 is 1.4 times that in the state where the teleconverter 3 is not attached. In the present embodiment, the magnification of the teleconverter 3 is 1.4.

(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 drive unit 570. The corresponding mount 510 and the lens side terminal holder 520 will be described in detail later.

  The lens CPU 530 comprises a microcomputer and its peripheral circuits. The lens 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 non-volatile storage medium. The lens side storage unit 550 is connected to the lens side CPU 530. The lens side storage unit 550 stores, in advance, a predetermined control program and the like that the lens side CPU 530 executes. The lens CPU 530 reads the control program from the lens storage unit 550 and executes the program to control the corresponding lens 5.

  The imaging optical system 560 forms an object 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 imaging element 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 the imaging position of the subject image. The drive unit 570 is connected to the lens CPU 530, and includes an actuator (not shown). The drive unit 570 moves the focusing lens 362 forward and backward in the optical axis O direction (+ Z, −Z direction) by the actuator or the like.

(Non-compliant 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 drive unit 670. The non-correspondent mount 610 and the lens side terminal holder 620 will be described in detail later.
The non-corresponding lens 6 is different from the image pickup optical system 560 of the corresponding lens 5 in the image pickup optical system 660, and includes a lens which moves in the direction of the optical axis O such as the focusing lens 662 on the image side. Therefore, the non-compliant lens 6 is formed so that the non-compliant mount 610 has a shape different from that of the compliant mount 510 so as not to be attached to the teleconverter 3. The lens side CPU 630, the lens side communication unit 640, the lens side storage unit 650 and the drive unit 670 of the non-corresponding lens 6 are the lens side CPU 530 of the corresponding lens 5, the lens side communication unit 540, the lens side storage unit 550 and the drive unit 570 It may be equivalent and can be changed as appropriate.

(Body side mount 210)
3 and 4 schematically show 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 in the horizontal position. As shown in FIG. 3, when the camera body 2 is held in the horizontal position, the rectangular image sensor 270 has the long side, ie, the upper side and the lower side, and the short side, the right side and the 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 lateral position. It is up and down. 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 lateral position. It is the left and right direction.

  The body side first straight line B1 and the body side second straight line B2 are orthogonal to each other on the optical axis O (center). As shown by the alternate long and short dash 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 imaging device 270 is a body-side third straight line B3. , And the body side fourth straight line B4.

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

  The body side claws 290 are spaced apart from one another along the circular opening 212 of the body side mount 210. As shown in FIG. 3, the body side first claw portion 290a is at the upper right position, the body side second claw portion 290b is at the upper left position, and the body side third claw portion 290c is at the lower left position. The claws 290 d are respectively disposed at the lower right position. The body-side first claw portion 290a is located above the body-side second straight line B2 and on the right side of the body-side first straight line B1, and the body-side second claw portion 290b is located above the body-side second straight line B2 and is on the body side In the left side area of the first straight line B1, the body side third claw portion 290c is lower than the body side second straight line B2 and in the left side area of the body side first straight line B1, the body side fourth claw portion 290d is the body It arrange | positions in the area | region below the side 2nd straight line B2, and the right side of the body side 1st straight line B1, respectively.

The body-side first claw portion 290a and the body-side third claw portion 290c are disposed on the line of the body-side fourth straight line B4 so as to sandwich the optical axis O. The body-side second claw portion 290 b and the body-side fourth claw portion 290 d are disposed on the line of the body-side third straight line B 3 so as to sandwich the optical axis O.
As shown in FIG. 3, the central 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. Does not overlap.

As shown in FIG. 4, the lengths in the circumferential direction of the body-side first claw portion 290 a to the body-side fourth claw portion 290 d are different from each other. Specifically, the body-side first claw portion 290a is the longest, the body-side third claw portion 290c is the second-longest, the body-side fourth claw portion 290d is the third-longest, and the body-side second claw portion 290b is The shortest.
An angle α1 between a straight line connecting one end of the first body side claw portion 290a and the optical axis O and a straight line connecting the other side of the first body side claw portion 290a and the optical axis O is about 47 degrees, 46 .5 degrees to 47.5 degrees.
An angle α3 between a straight line connecting one end of the third body side claw portion 290c and the optical axis O and a straight line connecting the other side of the third body side claw portion 290c and the optical axis O is about 42.5 degrees , 42.0 degrees to 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, 41 .5 degrees to 42.5 degrees.
An angle α2 between a straight line connecting one end of the body side second claw portion 290b and the optical axis O and a straight line connecting the other end of the body side second claw portion 290b and the optical axis O is about 40 degrees, .0 degrees to 41.0 degrees.
The radial lengths (the heights of the claws) of the body-side first claws 290a to the body-side fourth claws 290d are the same. Further, the lengths in the optical axis O direction (the thickness of the claws) of the body-side first claw portion 290a to the body-side fourth claw portion 290d 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 on the circumference of the opening 212, a portion where the body side claw portion 290 exists and a body side claw portion 290 exist. There is a part that does 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 and removal portion 280a.

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

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

An angle β4 between a straight line connecting one end of the fourth body side insertion / removal portion 280d and the optical axis O and a straight line connecting the other end of the fourth body side insertion / removal portion 280d with the optical axis O is about 46 degrees, 45 .5 degrees to 46.5 degrees.
An angle β2 between a straight line connecting one end of the body side second insertion and removal portion 280b and the optical axis O and a straight line connecting the other end of the body side second insertion and removal portion 280b and the optical axis O is about 39 degrees, 39 . 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 and removal portions 280 is 360 degrees.

  The body side first inserting and removing part 280a is an upper side of the body side third straight line B3 and a lower side of the body side fourth straight line B4, and the body side second inserting and removing part 280b is an upper side of the body side third straight line B3 and the body In the upper region of the side fourth straight line B4, the body side third insertion / extraction portion 280c is in the lower region of the body side third straight line B3 and in the upper region of the body side fourth straight line B4, the body side fourth insertion / extraction portion 280d is It arrange | positions in the area | region under the body side 3rd straight line B3, and the lower side of the body side 4th straight line B4, respectively.

The body-side first insertion and removal portion 280a and the body-side third insertion and removal portion 280c are disposed on the line of the body-side second straight line B2 so as to sandwich the optical axis O. The body side second insertion and removal portion 280b and the body side fourth insertion and removal portion 280d are disposed on the line of the body side first straight line B1 so as to sandwich the optical axis O.
As shown in FIG. 3, the central positions along the circumferential direction of each of the body-side first insertion and withdrawal portion 280a to the body-side fourth insertion and withdrawal portion 280d are a body-side first straight line B1 and a body-side second straight line B2. Does not overlap.

  Inside the opening 212 of the body side mount 210, a body side terminal holding portion 220 composed of 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 portion 220 is disposed on the inner peripheral side of the opening 212 of the body side mount 210 and above the imaging element 270. The circumferential center of the body side terminal holding portion 220 is preferably located on the body side first straight line B1.

  A body-side first claw portion 290 a is disposed at the upper right of the body-side terminal holding portion 220, and a body-side second insertion / extraction portion 280 b 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 first body side claw portion 290a. Is smaller than the sum of the angle .alpha.1 and the angle .beta.2 of the body side second insertion / extraction portion 280b.

  The body-side terminal groups included in the body-side terminal holding portion 220 are arranged in an arc at the top of the upper side of the imaging device 270. The body side terminal groups are respectively conductive pins. The body side terminal group is pushed in the −Z direction (FIG. 1) from the image side to the subject side by a spring or the like (not shown).

  The body side mount 210 has a hole through which the lock pin 214 passes. The hole through which the lock pin 214 passes is disposed at the upper right of the body side fourth claw portion 290 d. 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 fourth body side claw portion 290d exists and the region where the first body side claw portion 290a exists. Ru. The lock pin 214 is pushed toward 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 biasing 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, viewed from the object side. A first plate spring 213a is provided at a position corresponding to the first body side claw portion 290a (image side of the first body side claw portion 290a).
Similarly, a second plate spring 213b is provided at a position corresponding to the second body side claw portion 290b (image side of the second body side claw portion 290b), and a position corresponding to the third body side claw portion 290c ( A third plate spring 213c is provided on the image side of the third body side claw portion 290c, and a fourth plate side 213d is provided on the image side of the fourth body side claw portion 290d. A four plate spring 213d is provided.
In the following description, these four first plate springs 213 a to fourth plate springs 213 d are collectively referred to as a plate spring 213. The leaf spring 213 presses the object-side surface of the opposing accessory-side claw portion (described later) 390 or the lens-side claw portions (described later) 590 and 690 against the imaging element 270 (the + Z direction).

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

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

  The telecon-side first straight line L1 and the telecon-side second straight line L2 are orthogonal to each other on the optical axis O of the interchangeable lens 3. As shown by the alternate long and short dash line in FIG. 6, a line extending in a direction intersecting the telecon side first straight line L1 and the telecon side second straight line L2 at 45 degrees on the optical axis O is a telecon side third straight line L3. It is referred to as 4 straight line L4. When the teleconverter 3 is mounted on the camera body 2 in a usable state, the body side first straight line B1 and the telecon side first straight line L1 coincide with each other, and the body side second straight line B2 and the telecon side second straight line L2 The body side third straight line B3 and the telecon side fourth straight line L4 coincide with each other, and the body side fourth straight line B4 coincides with the telecon side third straight line L3. In addition, even if the straight lines do not completely coincide with each other, a shift may occur in a range in which the teleconverter 3 can be properly mounted on the camera body 2.

  The mount of the teleconverter 3 includes a rear terminal holding portion 320 contacting the body side terminal holding portion 220 when the teleconverter 3 is mounted on the camera body 2 and a rear side mount 310 contacting the body side mount 210. . The rear mount 310 is formed in an annular shape centered on the optical axis O of the teleconverter 3 and is disposed along a plane orthogonal to the optical axis O. The rear mount 310 has a reference surface 311 in contact with the reference surface 211 of the body mount 210 when the teleconverter 3 is mounted on the camera body 2. The reference surface 311 has an annular shape centered on the optical axis O, and is disposed along a plane orthogonal to the optical axis O. On the rear end surface of the reference surface 311 in the direction of the optical axis O, a lock pin sliding surface 309 on which a lock pin 214 described later slides in the mounting state is directed in the −Z direction on the 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 centering on the optical axis O, and is disposed along a plane orthogonal to the optical axis O.

  The rear mount 310 is fixed to the fixing member disposed 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 at an interval of about 90 degrees around the optical axis O. Further, the four screws 313 are respectively disposed on the outer periphery of four rear side claws 390 which will be described later. In addition, the two screws 313 are disposed on the outer periphery of both end portions in the circumferential direction of the rear terminal holding portion 320.

The rear mount 310 has a cylindrical portion 312 extending in the direction of the optical axis O from the inner peripheral edge (the inner peripheral edge of the reference surface 311). When the teleconverter 3 is attached to the camera body 2, the rear end of the cylindrical portion 312 in the direction of the optical axis O is positioned in the direction of projecting toward the camera body 2 with respect to the reference surface 311. The rear mount 310 is spaced apart from each other along the outer periphery of the rear end of the cylindrical portion 312 in the optical axis O direction, and the first rear claw 390a, the second rear claw 390b, and the third rear claw It has 390c and the back side 4th nail | claw part 390d.
In the following description, the first to fourth claws 390a to 390d, which are the four protrusions, are collectively referred to as a back claw 390.

  The rear claw portion 390 is provided in a direction of 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 the circumferential direction around the optical axis O. As shown in FIGS. 6 and 7, the rear first claw portion 390a is at the upper left position, the rear second claw portion 390b is at the upper right position, and the rear third claw portion 390c is at the lower right position, The rear fourth claw portion 390d is disposed at the lower left position. That is, the rear first claw portion 390a is above the telecon side second straight line L2 and in the region to the left of the telecon side first straight line L1, and the rear second claw portion 390b is above the telecon side second straight line L2 and In the area on the right side of the telecon-side first straight line L1, the rear third nail portion 390c is on the lower side of the telecon-side second straight line L2 and in the area to the right of the telecon-side first straight line L1. Are disposed below the telecon-side second straight line L2 and in the region to the left of the telecon-side first straight line L1.

In addition, the first rear claw portion 390a and the third rear claw portion 390c are on the line of the telecon-side third straight line L3 and are substantially symmetrical with respect to the optical axis O. 390 b and the rear fourth claw portion 390 d are respectively arranged in a region substantially on the line of the telecon side fourth straight line L 4 and centered on the optical axis O.
The telecon-side third straight line L3 and the telecon-side fourth straight line L4 do not necessarily pass through the central position along the circumferential direction of the rear first claw portion 390a to the rear fourth claw portion 390d.

  When the teleconverter 3 is mounted on the camera body 2, the body side claw portion 290 is disposed between the rear mount 310 and the rear side claw portion 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 side third claw portion 390c is in contact with the leaf spring 213c of the body side third claw portion 290c, and the rear fourth claw portion 390d is in contact with the leaf spring 213d of the body side fourth claw portion 290d.

  When the plate spring 213 of the body side claw portion 290 and the rear side claw portion 390 come in contact with each other, the rear side claw portion 390 moves away from the body side claw portion 290 along the optical axis O from the plate spring 213 (+ Z direction) It is pressed. As the rear claw portion 390 is pressed in the + Z direction (the imaging device 270 side), 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 lengths in the circumferential direction of the first rear claw portion 390 a to the fourth rear claw portion 390 d are different from each other. Further, a straight line connecting the optical axis O with 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 angles formed by the other end of the direction and the straight line connecting the optical axis O are different from each other. Specifically, the rear third claw portion 390c is the longest, the rear first claw portion 390a is the second longest, the rear fourth claw portion 390d is the third longest, and the rear second claw portion 390b is The shortest.
An angle α7 between a straight line connecting one end of the rear third nail 390 c and the optical axis O and a straight line connecting the other end of the rear third nail 390 c and the optical axis O is approximately 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, 47 .5 degrees to 48.5 degrees.

The angle α8 between the straight line connecting one end of the rear fourth claw portion 390d and the optical axis O and the straight line connecting the other end of the rear fourth claw portion 390d and the optical axis O is approximately 44 degrees, 43 It is between 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 approximately 36 degrees, 35 .5 degrees to 36.5 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 a rotation angle described later. Less than.

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

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

In the following description, a space 380 d between the rear first claw portion 390 a and the rear fourth claw portion 390 d on the outer periphery of the cylindrical portion 312 is referred to as a rear first insertion / extraction portion 380 a.
Similarly, a space 380b between the rear first claw portion 390a and the rear second claw portion 390b is divided into a rear second insertion / extraction portion 380b, a rear second claw portion 390b, and a rear third claw portion 390c. A space 380c between them is referred to as a rear third insertion and removal part 380c, and a space 380d between the rear third claw part 390c and the rear fourth claw part 390d is referred to as a rear fourth insertion and removal part 380d.
The four rear first inserting / removing parts 380 a to the fourth inserting / removing parts 380 d are collectively referred to as a rear inserting / removing part 380.

The lengths in the circumferential direction of the rear first inserting and removing part 380a to the rear fourth inserting and removing part 380d are different from each other. Specifically, the second rear 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 The shortest.
The angle β6 between the straight line connecting one end of the rear second insertion and withdrawal portion 380b and the optical axis O and the straight line connecting the other end of the rear second insertion and withdrawal portion 380b and the optical axis O is approximately 50 degrees. .5 degrees to 50.5 degrees.
An angle β5 between a straight line connecting one end of the rear first insertion and withdrawal portion 380a and the optical axis O and a straight line connecting the other end of the rear first insertion and withdrawal portion 380a and the optical axis O is about 45 degrees .5 degrees to 45.5 degrees.

An angle β8 between a straight line connecting one end of the rear fourth insertion and withdrawal part 380d and the optical axis O and a straight line connecting the other end of the rear fourth insertion and withdrawal part 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 inserting and removing part 380c and the optical axis O and a straight line connecting the other end of the rear third inserting and removing part 380c and the optical axis O is about 44 degrees. It is between 43.5 degrees and 44.5 degrees.
The sum of the angles α5 to α8 of all the back claws and the angles β5 to β8 of all the back insertion parts is 360 degrees.

Further, the first rear insertion and withdrawal portion 380a and the third rear insertion and withdrawal portion 380c are disposed on the line of the telecon side second straight line L2 so as to sandwich the optical axis O, and the rear second insertion and withdrawal portion 380b and the rear side The fourth insertion / extraction portion 380 d is disposed on the line of the telecon side first straight line L 1 so as to sandwich the optical axis O.
The telecon-side first straight line L1 and the telecon-side second straight line L2 do not necessarily pass through the central position along the circumferential direction of the rear first insertion / extraction portion 380a to the rear fourth insertion / extraction portion 380d.

  Inside the cylindrical portion 312, a rear terminal holding portion 320 formed of a plurality of rear terminals is provided. 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 disposed on the top of the rear mount 310 in parallel with the opening of the rear mount 310, and is preferably disposed at the center of the top as shown in FIGS. That is, it is preferable that the circumferential center of the rear terminal holding portion 320 be located on the straight line B10.

  The first rear claw portion 390 a is disposed at the upper left of the rear terminal holding portion 320, and the second rear insertion / extraction portion 380 b is disposed at the upper right of the rear terminal holding portion 320. Therefore, an angle between a straight line connecting one end of the rear terminal holding portion 320 and the optical axis O and a 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. And the angle .beta.6 of the rear second insertion / extraction portion 380b.

  The rear terminal holding portion 320 has a plurality of rear terminals as described above. The plurality of rear side terminals (referred to as a rear side terminal group) are arranged in a line inside the rear side mount 310 in the rear side terminal holding portion 320 and arranged 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 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 from the rear end in the optical axis O direction of the rear claw portion 390 in the −Z direction It may be located at
In addition, the contact surface of a part of the plurality of rear terminals may be positioned in the + Z direction from the rear end of the rear claw portion 390 in the optical axis O direction, and the remaining contact surface is 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 receiver 314. The lock pin receiving portion 314 is disposed 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 corresponding to the outer peripheral side of the first rear claw portion 390a in the lock pin sliding surface 309 of the rear mount 310 and the outer peripheral side of the fourth rear claw portion 390d. Are placed between the parts to be

The lock pin receiving portion 314 is a groove in which the lock pin 214 of the camera body 2 fits when the teleconverter 3 is attached to the camera body 2. The 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.
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 in a state where the lock release button of the camera body 2 is not pressed. When the lock release button of the camera body 2 is pressed, the -Z direction end of the lock pin 214 is positioned in the + Z direction 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 lock pin sliding surface 309.

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

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

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

The front mount of the teleconverter 3 includes a front mount 410, a front terminal holding portion 420, a reference surface 411, an opening 412, a lock pin 414, a front insertion / extraction portion 480, and a front claw portion 490. The front side mount 410, the front side 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 portion 420 has a plurality of front terminals (hereinafter referred to as “front terminal group”). The front side terminal group is connected to the telecon side control / communication unit 330 and the like.
Further, telecon-side reference lines B5 to B8 in FIG. 9 are the same as the body-side reference lines B1 to B4 of the body side mount 210.

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

  The front mount 410 has a protrusion 415 that protrudes from the inner diameter toward the optical axis O. The protrusion 415 is disposed along the circular opening 412 of the front mount 410 at an interval between the front second claw portion 490 b and the front third claw portion 490 c. As shown in FIG. 9, the protrusion 415 is disposed in a region at least a portion of the telecon-side second straight line B <b> 6 below the left side of the telecon-side first straight line B <b> 5. The circumferential length of the protrusion 415 is shorter than any of the front claws 490.

The front claw 490 and the projection 415 project from the opening 412 of the front mount 410 toward the optical axis O, and on the circumference of the opening 412, there is a portion where the front claw 490 and the projection 415 are not present. A space between the first front claw portion 490a and the fourth front claw portion 490d on the circumference of the opening 412 is referred to as a first front insertion / extraction portion 480a.
Similarly, the space between the front first claw portion 490a and the front second claw portion 490b is referred to as the front second insertion portion 480b, and the space between the front second claw portion 490b and the projection 415 is referred to as the front third insertion portion 480c. A space between the projection 415 and the third front claw portion 490c is a front fourth insertion / extraction portion 480d, and a space between the front third claw portion 490c and the front fourth claw portion 490d is a front fifth insertion portion 480e, It calls each. The front first insertion / extraction portion 480 a to the fifth insertion / extraction portion 480 e, which are the five spaces, are collectively referred to as a front insertion / extraction portion 480. The front side first insertion and withdrawal part 480a, the front side second insertion and withdrawal part 480b, and the front side fifth insertion and withdrawal part 480e are similar to the body side first insertion and withdrawal part 280a, the body side second insertion and withdrawal part 280b, and the body side fourth insertion and withdrawal part 280d.

  The lengths in the circumferential direction of the first to fifth insertion / extraction portions 480a to 480e are different from each other. Specifically, the front first insertion and withdrawal portion 480a is the longest, the front fifth insertion and withdrawal portion 480e is the second longest, the front second insertion and withdrawal portion 480b is the third longest, and the front fourth insertion and withdrawal portion 480d is the fourth longest , And the front third insertion / extraction 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 approximately 12 degrees, and 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 the one end of the front third claw portion 490c and the optical axis O is approximately 30 degrees, and between 28 degrees and 32 degrees It is.
A value obtained by totaling the angles α9 to α13 of all the front claws 490 and the projections and the angles β9 to β13 of all the front insertion and extraction portions 480 is 360 degrees.

  FIG. 22 is a schematic view of the front mount 410 as viewed from the imaging device side (image side). FIG. 22 is the reverse of FIG. 9 and FIG. A leaf spring 413 is provided at a position corresponding to the front claw 490 (the image side of the front claw 490). The plate spring 413 is substantially the same as the plate spring 213 provided on the body side mount 210, but can be changed as appropriate as long as the corresponding lens 5 can be mounted. A portion where the leaf spring 413 biases the lens side claw portion 590 of the corresponding lens 5 described later is indicated by a dotted line area. The projection 415 is not disposed on the image side because the lens side claws 510 of the corresponding mount 510 described later do not oppose each other when the mounting is completed.

(Corresponding mount 510 of the corresponding 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 corresponding mount 510 is different from the non-corresponding mount 610 of the non-corresponding lens 6 and the rear mount 310 of the teleconverter 3 in that the corresponding mount 510 is provided with a notch that allows the projection 415 of the front side mount 410 to pass. The lens side reference lines L <b> 5 to L <b> 8 in FIG. 11 are the same as the telecon side reference lines L <b> 1 to L <b> 4 of the rear mount 310 of the teleconverter 3.

  The mount on the image side of the corresponding lens 5 is the corresponding mount 510, lens side terminal holding portion 520, reference surface 511, sliding surface 509 for lock pin, screw 513, cylindrical portion 512, lock pin receiving portion 514, lens side claw portion 590, the lens side insertion and removal part 580 is provided. 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 are the rear terminal holding portion 320 of the rear mount 310, the reference surface 311, the lock The pin sliding surface 309, the screw 313, the cylindrical portion 312, and the lock pin receiving portion 314 are substantially equivalent. The lens side terminal holding portion 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 or the like.

  The mount on the image side of the corresponding lens 5 is a lens side claw portion 590 disposed between the front mount 410 and the front claw portion 490 in the optical axis O direction when the corresponding lens 5 is attached to the teleconverter 3. Prepare. In addition, 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 attached to the teleconverter 3.

  The number of lens side claws 590 and the number of lens side insertion and removal portions 580 are at least two or more in each case, and five in the present embodiment. The number of lens side claws 590 and the number of lens side insertion and removal portions 580 are preferably four or more, because sufficient strength can be obtained even if the diameter of the cylindrical portion 312 is increased. In the present embodiment, the lens side first insertion and removal portion 580a, the lens side first claw portion 590a, and the lens side second insertion and removal portion are arranged along the circumferential direction of the cylindrical portion 512 from the position of the inner periphery on the lock pin receiving portion 514 side. 580b, lens side second claw portion 590b, lens side third insertion and removal portion 580c, lens side third claw portion 590c, lens side fourth insertion and removal portion 580d, lens side fourth claw portion 590d, lens side fifth insertion and removal portion 580e The lens side fifth claw portion 590e is disposed.

  When the corresponding lens is attached to the teleconverter 3, the four lens side claws 590 other than the lens side third claw 590 c contact the respective leaf springs 413 of the front side mount 410. When the plate spring 413 and the four lens side claws 590 come in contact with each other, the four lens side claws 590 are pressed by the plate spring 413 in a direction away from the front side claw 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 lengths in the circumferential direction of the lens side claws 590 are different from each other. That is, the angles formed by the straight line connecting the optical axis O with one end in the circumferential direction of each lens side claw portion 590 and the straight line connecting the other end with the optical axis O are different from each other. Specifically, the lens side first claw portion 590a is the longest, the lens side fifth claw portion 590e is the second longest, the lens side second claw portion 590b is the third longest, and the lens side fourth claw portion 590d is It is the fourth longest and the lens side third claw 590c is the shortest. The length in the circumferential direction of each lens side claw portion 590 is only required to be able to receive the biasing force from the plate spring 413 when the corresponding lens 5 is attached to the teleconverter 3. It is preferable to abut on at least two of the front claws 490 at the erroneous mounting position described later when inserting.

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

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

The angle β14 between the straight line connecting one end of the lens side first insertion and removal portion 580a and the optical axis O and the straight line connecting the other end of the lens side first insertion and removal portion 580a and the optical axis O is approximately 45 degrees. It is between 52 and 52 degrees.
An angle β15 between a straight line connecting one end of the lens side second insertion and removal part 580b and the optical axis O and a straight line connecting the other end of the lens side second insertion and removal part 580b and the optical axis O is about 49.5 degrees , Between 48 degrees and 51 degrees.
The angle β16 between the straight line connecting one end of the lens side third insertion and removal portion 580c and the optical axis O and the straight line connecting the other end of the lens side third insertion and removal portion 580c and the optical axis O is approximately 44 degrees. It is between 46 and 46 degrees.
An angle β17 between a straight line connecting one end of the fourth lens side insertion / extraction portion 580d to the optical axis O and a straight line connecting the other end of the lens side fourth insertion / extraction portion 580d to the optical axis O is approximately 10 degrees, Between 11 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 insertion / extraction portion 580e to the optical axis O and a straight line connecting the other end of the lens side fifth insertion / extraction portion 580e to the optical axis O is about 44.5 degrees , 42.5 degrees to 46.5 degrees.
The sum of the angles α14 to α18 of all the lens side claws 590 and the angles β14 to β18 of all the lens side insertion and removal portions 580 is 360 degrees.

In addition, 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 and removal portion 580d, and the lens side fourth claw portion 590d, and the lens side third straight line L7. And the optical axis O is interposed.
A first lens-side claw 590 a is disposed at the upper left of the lens-side terminal holding portion 520, and a second lens-side insertion and removal portion 580 b is disposed at the upper right of the lens-side terminal holding portion 520. Therefore, an angle between a straight line connecting one end of the lens side terminal holding portion 520 and the optical axis O and a 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. And the angle .beta.15 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 fifth lens-side claw 590e, the restriction pin 5 (not shown) is disposed in the direction of protruding from the outer peripheral surface of the cylindrical portion 512. There is. This limiting pin is substantially equivalent to the limiting pin 315 of the rear side mount 310 shown in FIG.

(Non-compliant mount 610 for non-compliant lens 6)
The mount on the image side of the non-corresponding lens 6 is substantially equivalent to the mount on the rear side of the teleconverter 3, and in addition to the non-corresponding mount 610, a reference surface, sliding surface for lock pin, screw, cylindrical portion, insertion / extraction portion , Equipped with claws. The reference surface of the non-corresponding 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 mount on the rear side of the teleconverter 3, and are not shown. The mount on the image side of the non-corresponding lens 6 is substantially equivalent to 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-corresponding mount 610 includes a terminal holding portion having substantially the same shape as the rear side terminal holding portion 320. The terminal holding portion of the non-compliant mount 610 includes a plurality of lens-side terminal groups, and when mounted on the camera body 2, contacts the body-side terminal group of the body-side mount 210 to electrically conduct. The lens side terminal group of the non-correspondence 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 a claw portion, and the body side insertion and extraction portion 280, the rear side insertion and extraction portion 380, the front side insertion and extraction portion 480, The lens side insertion and removal part 580 is generically referred to as an insertion and removal part.

(How to attach the teleconverter 3 to the camera body 2)
Next, with reference to FIGS. 13 and 14, a method of mounting the teleconverter 3 on the camera body 2 will be described. FIGS. 13 and 14 are 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 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 pickup device 270 (as viewed in the + Z direction), and the rear side mount 310 is a diagram 6, the left and right are reversed.

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

  From the above 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 about the optical axis O in a plane substantially orthogonal to the optical axis O. As the teleconverter 3 rotates, the body-side first claw portion 290a and the plate spring 213a enter the space between the rear first claw portion 390a and the reference surface 311.

That is, the rear side first claw portion 390a enters the imaging element 270 side (+ Z side) of the body side first claw portion 290a, and the rear side first claw portion 390a is the imaging element 270 side (+ Z side) of the plate spring 213a. To face. At the same time, the body-side first claw 290 a and the plate spring 213 a enter the space between the rear first claw 390 a and the reference surface 311. Similarly, the body-side second claw portion 290b and the plate spring 213b enter the space between the rear second claw portion 390b and the reference surface 311, and the space between the rear third claw portion 390c and the reference surface 311 The body-side third claw portion 290c and the leaf spring 213c enter the space, and the body-side fourth claw portion 290d and the leaf spring 213d enter the space between the rear fourth claw portion 390d and the reference surface 311. At this time, the rear side terminal group comes in contact with 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 at a first angle in the mounting direction 44 with respect to the camera body 2 from the insertion position of FIG. 13, and shows the state where the teleconverter 3 is mounted on the camera body 2. The position of the teleconverter 3 at this time is called a mounting position. The first angle is about 40 degrees in this embodiment, and 38.5 degrees to 41.5 degrees.

  In the mounting position, the lock pin 214 of the camera body 2 is pushed in the −Z direction and enters the lock pin receiver 314 of the teleconverter 3. When the lock pin 214 enters the lock pin receiver 314, the teleconverter 3 regulates rotation for removal with respect to the camera body 2. That is, when the body side claws 290 and the rear side claws 390 reach the mounting position, the relative positions of the body side mount 210 and the rear side mount 310 in the circumferential direction become settled.

Further, the rear side claw portion 390 is pushed toward the image pickup device 270 (the + Z direction) by the plate spring 213, and the reference surface 311 of the rear side mount 310 contacts the reference surface 211 of the body side mount 210. When the rear mount 310 is in surface contact with the body mount 210 and biased by the plate 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 side terminals and is electrically connected.

  Further, the state from the state where each rear side claw portion 390 in FIG. 13 is inserted into the corresponding body side insertion and removal portion 280 at the insertion position to the position just before the mounting position in FIG. Since the lock pin 214 of the camera body 2 is pressed in the −Z direction, the −Z direction end of the lock pin 214 contacts the lock pin sliding surface 309 of the rear mount 310 during the mounting state.

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

(How to remove the teleconverter 3 from the camera body 2)
When the user depresses a lock release button (not shown) of the camera body 2 at the mounting position, the lock pin 214 retracts from the lock pin receiving portion 314 toward the imaging element 270. Thereby, the rotation restriction on the camera body 2 of the teleconverter 3 is released, and the rear mount 310 can be rotated with respect to the body mount 210. When the teleconverter 3 is rotated relative to the camera body 2 in the direction (removal direction) opposite to the mounting direction 44 while pressing the lock release button (not shown), the rear side claws 390 move to the body side claws 290. It moves to the position of each body side insertion / extraction part 280 from the position which opposes the image side of, and reaches the insertion position shown in FIG.

(Description of over-rotation state in the mounting direction when mounting the teleconverter 3 to the camera body 2)
Next, with reference to FIG. 15, an over-rotation state in which the teleconverter 3 is rotated with respect to the camera body 2 in the mounting direction 44 by a first angle or more will be described. FIG. 15 is a schematic diagram showing the positional relationship between the body-side fourth claw portion 290d of the camera body 2 and the rear fourth claw portion 390d of the teleconverter 3. The upper part (a) of the dashed dotted line is the image pickup device from the subject side It is the figure seen from the 270 side, and the lower part (b) of a dashed dotted line is a figure seen from the side (peripheral direction) of a mount. If the user rotates the teleconverter 3 in the mounting direction 44 while pressing the lock release button when mounting the teleconverter 3 to the camera body 2, the lock pin 214 does not enter the lock pin receiver 314 at the mounting position. Therefore, the teleconverter 3 can be further rotated relative to the camera body 2 from the mounting position shown in FIG. When the teleconverter 3 is further rotated in the mounting direction 44 from the mounting position with respect to the camera body 2, the limiting pin 315 abuts on the rear end of the body side fourth claw portion 290d in the mounting direction 44. It prevents further rotation with respect to the camera body 2.

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

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

(Description of the erroneous insertion state of the teleconverter 3 into the camera body 2)
Next, a misinsertion state in which the user tries to insert the teleconverter 3 into the camera body 2 at a wrong position without aligning the index of the teleconverter 3 and the index of the camera body 2 will be described. Since the rear side claw portion 390 does not pass through the body side insertion / extraction portion 280 in the erroneous insertion state, the positional relationship between the rear side claw portion 390 and the body side claw portion 290 on the optical axis O is the positional relationship at the insertion position It is different. FIGS. 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, in which the contact state between 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 imaging device 270 (as viewed in the + Z direction), and the rear side mount 310 is a diagram 6, the left and right are reversed. 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 15 degrees in the removal direction from the insertion position. Moreover, the state which shifted the parameter | index of the teleconverter 3 and the parameter | index of the camera body 2 by 90 space | intervals from an insertion position is shown in FIGS. 18-20.

  FIG. 17 shows a state (first erroneous insertion state) deviated by 15 degrees in the removal direction from the insertion position. 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 four symbols γ1 to γ4, and therefore, the rear side claw portion 390 is not inserted into the body side insertion and removal portion 280. That is, in the first erroneous insertion state, the rear claw portion 390 and the body side claw portion 290 abut each other at four places, 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 approximately 90 degrees in the removal direction from the insertion position (second erroneous insertion state). FIG. 19 is a diagram showing a third erroneous insertion state in which the index of the teleconverter 3 and the index of the camera body 2 are shifted approximately 180 degrees from the insertion position in the removal direction. FIG. 20 is a diagram showing a fourth erroneous insertion state in which the index of the teleconverter 3 and the index of the camera body 2 are shifted approximately 270 degrees in the removal direction from the insertion position.

  As shown in FIG. 18, in the case of the second misinsertion state, the rear side third claw portion 390c has a portion indicated by a symbol γ5 corresponding to the body side first claw portion 290a and a body side second claw portion 290b at γ7. The portion shown is hit and can not be inserted into the body side second insertion / extraction portion 280b. In addition, a portion indicated by symbol γ6 hits the body-side fourth claw portion 290d in the rear first claw portion 390a and can not be inserted into the body-side fourth insertion and removal portion 280d. As described above, in the second erroneous insertion state, the rear claw portion 390 abuts on the body side claw portion 290 at three places to prevent erroneous insertion.

  As shown in FIG. 19, in the case of the third erroneous insertion state, a portion indicated by symbol γ8 hits the body-side first nail portion 290 a in the rear fourth nail portion 390 d, and the body-side second insertion / extraction portion 280 b I can not insert it. In addition, a portion indicated by reference symbol γ9 hits the body-side third claw portion 290c in the rear-side first claw portion 390a and can not be inserted into the body-side first insertion and removal portion 280a. As described above, in the third erroneous insertion state, the rear claw portion 390 abuts with the body side claw portion 290 at two places to prevent erroneous insertion.

  As shown in FIG. 20, in the case of the fourth misinsertion state, the rear first claw portion 390a has a portion indicated by a symbol γ10 corresponding to the body first claw portion 290a and a body side second claw portion 290b at γ11 The portion shown is hit and can not be inserted into the body side second insertion / extraction portion 280b. In addition, the portion indicated by symbol γ12 hits the body-side third claw portion 290c in the rear-side third claw portion 390c, and can not be inserted into the body-side fourth insertion / extraction portion 280d. Thus, in the fourth erroneous insertion state, the rear claw portion 390 abuts on 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 side claw portion 390 abuts the body side claw portion 290 at least at two places, and the rear side claw portion 390 is the body side insertion and extraction portion except the insertion position. Insertion into 280 is prohibited. Therefore, even if it is attempted to mount the teleconverter 3 on the camera body 2 at the incorrect insertion position, the claws contact each other in at least two places, so that the erroneous insertion can be reliably prevented.

  In addition, in the first erroneous insertion state to the fourth erroneous insertion state, one of the two or more contact points is located above the imaging element 270. That is, in the incorrect insertion position, any one of the rear first claw portion 390a to the rear third claw portion 390c abuts on the end of the body-side first claw portion 290a in the mounting direction 44, and the second rear side It prevents that the rear side nail | claw part 390 other than the nail | claw part 390b inserts in the body side 2nd insertion-extraction part 280b. As described above, the body-side terminal holding portion 220 is disposed in the opening 212 of the body-side mount 210 and above the imaging device 270. A body-side first claw portion 290 a is provided at the top of the body-side terminal holding portion 220, and the body-side first claw portion 290 a has the longest circumferential length among the four body-side claw portions 290. Further, a body-side second insertion / extraction portion 280b is provided at the top of the body-side terminal holding portion 220, and the body-side second insertion / extraction portion 280b is the shortest among the four body-side insertion / removal portions 280. Therefore, only the rear second claw portion 390b is inserted into the body side second insertion and removal portion 280b at the regular insertion position, and the other rear side first claw portion 390a to the body side second insertion and removal portion 280b The rear third nail portion 390c is not erroneously inserted. In addition, the first rear claw portion 390a to the third rear claw portion 390c do not enter the body side second insertion / extraction portion 280b by being inclined (in the direction intersecting with the optical axis O direction). This prevents the rear side claws 390a to 390c from colliding with the body side terminal holding portion 220 and damaging the body side terminals in the erroneous insertion state.

  In addition, although the body side first claw portion 290a prevents any erroneous insertion when either of the rear side claw portions 390 hits in the erroneous insertion state, the body side first claw portion 290a has four rear side claw portions 390. Among them, the length in the circumferential direction is the longest and the tolerance is high, so that the possibility of breakage of the body-side first claw portion 290a at the time of erroneous insertion can be reduced. Further, in the second to fourth incorrect insertion states, at least one of the contact points is at a position facing the body side terminal holding portion 220 across the optical axis O. That is, one of the contact points is near the body-side terminal holder 220 and above the second straight line B2 passing through the optical axis O, and one of the contact points is the body side passing through the optical axis O It is below the second straight line B2. Therefore, although there are two or three contact points in the 2nd to 4th misinsertion states, they abut on the upper and lower sides of the body side second straight line B2 passing through the optical axis O, so the possibility of erroneous insertion is low. can do. Further, in the second to fourth incorrect insertion states, the distance between at least two of the contact points in the circumferential direction can be maintained larger than about 120 degrees. The claw portion 390a to the rear third claw portion 390c are not inclined and enter.

  Further, 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 portion 320. That is, at the erroneous insertion position, any one of the first to fourth body claws 290 a to 290 d abuts on the end of the rear first claw 390 a in the mounting direction 44 of the first claw 390 a. Therefore, the second to fourth claws 290b to 290d are prevented from being erroneously inserted into the rear second insertion / extraction portion 380b. As described above, at the top of the rear terminal holding portion 320, there is an end portion on the tip side of 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 and removal portions 280b to 280d other than the body side first insertion and removal portion 280a and hitting the rear side terminal holding portion 320 and damaging the rear side terminals. doing. Further, although the rear first claw portion 390 a hits any one of the body side claw portions 290 in the erroneous insertion state to prevent erroneous insertion, the rear first claw portion 390 a is one of the four rear claw portions 390. Second, since the length in the circumferential direction is long and the tolerance is relatively high, the possibility of breakage of the rear first claw portion 390a at the time of erroneous insertion can also be reduced.

Here, as shown in FIG. 13, the rear second claw portion 390 b passes through the body-side second insertion and removal portion 280 b and is disposed at the insertion position, and faces the body-side second claw portion 290 b 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 and removal portion 280b is smaller than the first angle from the insertion position to the mounting position. Therefore, by making the rear side second claw portion 390b smaller than the first angle, the body side second insertion and removal portion 280b is made smaller and the other rear side claw portion other than the rear side second claw portion 390b in the erroneous insertion state 390 can be prevented from passing. In particular, in the second misinsertion state to the fourth misinsertion state in which the contact point between the rear side claw portion 390 and the body side claw portion 290 is two or three places, other than the rear side second claw portion 390b It is possible to prevent the other rear claws 390a, 390c, and 390d from passing through the body-side second insertion and removal portion 280b. Since the body side terminal holding portion 220 is disposed on the inner diameter side of the body side second insertion and removal portion 290b, the other rear side claw portions 390a, 390c, and 309d are prevented from passing through the other side. It is also possible to prevent the rear side claw portion 390 or 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 portion 390b may be smaller than the angles α5, α7, α8 of the rear first claw portion 390a, the rear third claw portion 390c, and the rear fourth claw portion 390d. The angle β2 of the body-side second insertion / extraction portion 280b may be smaller than the angles α5, α7, α8 of the first rear claw portion 390a, the third rear claw portion 390c, and the fourth rear claw portion 390d.

(How to attach the compatible lens 5 to the teleconverter 3, etc.)
Next, with reference to FIGS. 21 and 22, a method of mounting the corresponding lens 5 to the teleconverter 3 will be described. 21 and 22 are diagrams showing the positional relationship between the front claw 490 of the teleconverter 3 and the lens side claw 590 of the corresponding lens 5, in which the contact state between the claws can be understood. . 21 and 22 are views of the front side mount 410 and the corresponding mount 510 as viewed from the imaging device 270 side toward the subject side (as viewed in the -Z direction), and FIGS. Is inverted.

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

From the above 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, the front claws 490 and the leaf springs 413 enter the spaces between the lens side claws 590 and the reference surface 511, respectively. At this time, the lens side terminal group sequentially contacts the front side terminal group and is electrically connected.
FIG. 22 is a view 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 of FIG. 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 portion 590c does not face the front side third claw portion 490c.

  In the mounting position, the lock pin 414 of the teleconverter 3 is pushed in the −Z direction to enter the lock pin receiver 514 of the corresponding lens 5. When the lock pin 414 enters the lock pin receiver 514, the corresponding lens 5 restricts the rotation for removing the teleconverter 3. That is, when the front claws 490 and the lens claws 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 pickup device 270 (the + Z direction) by the plate 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 biased by the plate spring 413, the corresponding lens 5 and the teleconverter 3 are firmly mounted.

  Also, the state from the insertion position of FIG. 21 to the mounting position of FIG. 22 is referred to as a mounting state. The -Z direction end of the lock pin 414 of the teleconverter 3 is in contact with the lock pin sliding surface 509 of the corresponding mount 510 when in 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 disposed in the first angle range opposite to the mounting direction 44 from the lock pin receiving portion 514 of the lock pin sliding surface 509. By not disposing the fixing screw in the first angle range in the reverse direction, the -Z direction end of the lock pin 414 does not hit the fixing screw when sliding on the lock pin sliding surface 509, so it is smoothed. 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 lock release button (not shown) of the teleconverter 3 is depressed, and the corresponding lens 5 is rotated relative to the teleconverter 3 in the removal direction so as to be relatively rotated from the mounting position to the insertion position.
The overrotation state in the mounting direction when mounting the corresponding lens 5 to the teleconverter 3 is also substantially the same as the overrotation state of the mounting method when mounting the teleconverter 3 to the camera body 2. The limiting pin of the corresponding lens 5 abuts on the rear end in the mounting direction 44 of the fourth front claw portion 490 d to prevent the corresponding lens 5 from further rotating with respect to the teleconverter 3.
The overrotation state in the removal direction when removing the corresponding lens 5 from the teleconverter 3 is also substantially the same as the overrotation state in the removal direction when removing the teleconverter 3 from the camera body 2. The limiting pin of the corresponding lens 5 abuts on the tip of the mounting direction 44 of the front third claw portion 490c, and prevents the corresponding lens 5 from further rotating in the removal direction with respect to the teleconverter 3.

(Description of the erroneous insertion state of the corresponding lens 5 to the teleconverter 3)
Next, a misinsertion state in which the user tries to insert the corresponding lens 5 into the teleconverter 3 at an incorrect position without aligning the index of the corresponding lens 5 with the index of the teleconverter 3 will be described. In the erroneously inserted state, the lens side claw portion 590 does not pass through the front insertion / extraction portion 480.
FIG. 23 to FIG. 27 are diagrams showing dotted lines as to where the front claw portion 490 or the protrusion 415 abuts on the lens side claw portion 590 in the erroneously inserted state. FIG. 23 shows a state of being deviated by approximately 90 degrees in the opposite direction to the mounting direction 44 from the angle of the insertion position of FIG. 21 (fifth erroneous insertion state). FIG. 24 shows a state (sixth erroneous insertion state) shifted approximately 10 degrees in the opposite direction to the mounting direction 44 from the fifth erroneous insertion state. FIG. 25 is a state (seventh erroneous insertion state) shifted about 10 degrees in the opposite direction to the mounting direction 44 from the sixth erroneous insertion state. FIG. 26 shows a state in which the seventh misinsertion state is deviated by approximately 70 degrees in the opposite direction to the mounting direction 44 (the eighth misinsertion state). FIG. 27 shows a state (9th erroneous insertion state) shifted approximately 5 degrees in the opposite direction to the mounting direction 44 from the eighth erroneous insertion state. In the fifth to ninth misinsertion states, the lens side claw portion 590 abuts on the front claw portion 490 or the protrusion 415 at at least three places (γ20, γ21), thereby reliably preventing erroneous insertion. In the erroneous insertion state, the number of contact points between the lens side claw portion 590 and the front side claw portion 490 or the protrusion 415 is the number of contact points between the rear side claw portion 390 and the body side claw portion 290 because the projections 415 are present. Become more.
As described above, in the erroneous insertion state, the lens side claw portion 590 abuts on the front side claw portion 490 at at least three places, and the lens side claw portion 590 may be inserted into the front side insertion and extraction portion 480 except the insertion position. It is forbidden. Therefore, even if the corresponding lens 5 is to be attached to the teleconverter 3 at the erroneous insertion position, the erroneous insertion can be reliably prevented by the claws contacting each other in at least three places.

  Further, in the erroneous insertion state, one of the contact points is located on the object side (−Z direction) from the front side terminal holding portion 220 and on the outer peripheral side. That is, at the erroneous insertion position, at least one of the end on the tip end side of the front first claw portion 490a in the mounting direction 44 or the end on the rear end side of the front second claw portion 490b in the mounting direction 44 Either contacts the lens side claw portion 580 other than the lens side second claw portion 590b and prevents the lens side claw portion 580 from being inserted into the front second insertion / extraction portion 480b, thereby protecting the front side terminal holding portion 220. Further, while the front first claw portion 490a abuts on any of the lens side claw portions 580 other than the lens side second claw portion 590b in the erroneously inserted state, the front first claw portion 490a has four lens side claw portions 490. Among them, the length in the circumferential direction is the longest and the tolerance is high, so that the possibility of breakage of the front first claw portion 490a at the time of erroneous insertion can be reduced.

  Furthermore, in the erroneous insertion state, at least one of the contact points is at a position facing the front terminal holding portion 220 across the optical axis O. That is, one of the contact points is above the second front straight line B2, and one of the contact points is below the second front straight line B2 passing the optical axis O. Therefore, although there are two or three contact points in the 2nd to 4th misinsertion states, the contact on the upper and lower sides of the telecon-side sixth straight line B6 passing through the optical axis O respectively reduces the possibility of erroneous insertion can do. Further, in the erroneous insertion state, the interval in the circumferential direction of at least two of the contact points can be maintained larger than about 120 degrees, and the lens other than the lens side second claw portion 590b in the front second insertion / extraction portion 480b at the time of erroneous insertion There is no possibility that any one of the side claws 580 will enter in an inclined manner.

  Further, in the erroneous insertion state, one of the abutting portions abuts on the lens side first claw portion 590a positioned on the outer peripheral side of the lens side terminal holding portion 520, and the lens side claws other than the lens side first claw portion 590a The portion 590 is inserted and prevented from hitting the lens side terminal holding portion 520. Further, although the lens side first claw portion 590a hits any of the front side claw portions 490 in the erroneous insertion state and prevents erroneous insertion, the lens side first claw portion 590a is one of the five lens side claw portions 590. Second, since the circumferential length is long and the tolerance is relatively high, the possibility of breakage of the lens side first claw portion 590a at the time of erroneous insertion can also be reduced.

  Here, as shown in FIG. 21, the lens side second claw portion 590b passes through the front second insertion / extraction portion 480b and is disposed at the insertion position, and faces the front second claw portion 490b at the mounting position. The angle α14 (FIG. 11) of the lens side second claw portion 590b is smaller than the angle β10 (FIG. 10) of the front second insertion portion 480b. 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 and removal portion 480b is made smaller and the lens side claw portion 590 other than the lens side second claw portion 590b in the erroneous insertion state Can be prevented from passing. In particular, the lens side claws 590 other than the lens side second claws 590b are provided with the front second insertion / extraction portion 480b in the erroneous insertion state in which the contact positions between the lens side claws 590 and the front side claws 490 are three. It is possible to prevent passing. Since the front terminal holding portion 420 is disposed on the inner diameter side of the front second insertion / extraction portion 490b, the other lens side claw portion 590 or the other lens side claw portion 590 can be prevented by preventing the other lens side claw portion 590 from passing through. It can also be prevented that the cylindrical portion 512 hits the front terminal holding portion 420 and the front terminal is damaged.

(Method to prevent attachment of non-compliant lens 6 to teleconverter 3)
Next, a method of preventing attachment of the incompatible lens 6 to the teleconverter 3 will be described. The non-correspondence mount 610 has substantially the same shape as the rear side mount 310, and when attempting to insert the non-correspondence lens 6 at the insertion position with respect to the teleconverter 3, the projection 415 contacts the third lens side claw of the non-correspondence mount 610. Contact and insertion is prevented.

(How to attach the compatible lens 5 to the camera body 2 or the incompatible lens 6, etc.)
When the corresponding lens 5 or the non-corresponding lens 6 is attached to the camera body 2, it is the same as when the teleconverter 3 is attached to the camera body 2. The corresponding mount 510 or non-corresponding mount 610 is attached to the body side mount 210. Since the body side mount 210 has no protrusion 415, the lens side third hook portion 590c and the lens side fourth hook portion 590d of the corresponding mount 510 can be inserted into the body side third insertion and removal portion 280c of the body side mount 210. . Further, when inserting the corresponding mount 510 into the body side mount 210, at least two places of γ20 shown in FIG. 23 to FIG.

  According to the embodiment described above, the teleconverter 3, the corresponding lens 5, and the non-corresponding lens 6 can be attached to the camera body 2 in an appropriately usable state. In particular, when the teleconverter 3, the corresponding lens 5 or the non-corresponding lens 6 is attached to the camera body 2, the four claws 390, 590 are in the + Z direction from the plate springs 213 of the four body side claws 290. It is pressed. That is, even when the camera system 1 receives an impact, since there are four protrusions (the rear claw portion 390, the lens side claw portion 490, and the body side claw portion 290), the shock resistance is high.

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

  The four projecting portions of the tele converter 3, the corresponding lens 5 or the non-corresponding lens 6 are disposed on a straight line intersecting at approximately 45 degrees on the optical axis O with respect to the straight line connecting the center of the contact holding portion and the optical axis O It is in contact with four leaf springs 213 arranged at an interval of about 90 degrees around the optical axis O to face the four protrusions of the camera body 2. Thereby, the impact resistance is high even when the camera system 1 is held in the horizontal position or in the vertical position. In particular, a straight line connecting the center of the contact holding portion and the optical axis O (B1, L1, B5) even if the teleconverter 3, the corresponding lens 5, the non-corresponding lens 6 or the camera body 2 receives vertical impact , L5), two protrusions are disposed on each of the right side and the left side, so that impact in the vertical direction can be received by two or more protrusions.

  The body side second claw portion 290b and the body side fourth claw portion 290d are disposed on the body side third straight line B3, and the body side first claw portion 290a and the body side third claw portion are disposed on the body side fourth straight line B4. 290c were placed. Here, the angle α 4 of the body side fourth claw portion 290 d is the third largest among the four body side claw portions 290, and the angle α 2 of the body side second claw portion 290 b is the among the four body side claw portions 290 The smallest angle (fourth largest). Further, the angle α1 of the first body side claw portion 290a is the largest among the four body side claw portions 290, and the angle α3 of the third body side claw portion 290c is the second angle among the four body side claw portions Is large.

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

  The rear first nail portion 390a and the rear third nail portion 390c are disposed on the telecon side third straight line L3, and the rear second nail portion 390b and the rear fourth nail portion are disposed on the telecon side fourth straight line L4. And 390d were placed. Here, the angle α 8 of the rear fourth claw portion 390 d is the third largest in the four rear claw portions 390, and the angle α 6 of the rear second claw portion 390 b is the fourth rear claw portion 390. The smallest angle (fourth largest). Further, the angle α5 of the rear first claw portion 390a is the second largest among the four rear claw portions, and the angle α7 of the rear third claw portion 390c is the largest angle among the four rear claw portions large.

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

  Further, in the present embodiment, the rear third claw portion 390c has a larger angle between the first rear claw portion 390a and the third rear claw portion 390c disposed on the third telecon-side straight line L3. The angle of the rear fourth claw portion 390d is larger at the rear second claw portion 390b and the rear fourth claw portion 390d disposed on the side fourth straight line l4. That is, in the two rear side claws 390 facing each other across the optical axis O, the two rear side claws 390 on the lower side than the telecon-side second straight line L2 (horizontal direction) are large. Therefore, in a state in which the camera system is held in the horizontal position, the impact received from the lower direction on the interchangeable lens 3 is increased by the large area of the two rear side claws 390 below the telecon side second straight line L2. Can receive. When the camera system 1 is held in the horizontal position and the interchangeable lens 3 receives a downward impact, the rear claws 390 below the second telecon-side second straight line L2 contact the body-side claws 290. An impact is received in the approaching direction (−Z direction). Here, the leaf spring 213 presses the rear claw portion 390 in a direction (+ Z direction) away from the body side claw portion 290. Therefore, with the camera system 1 held in the horizontal position, even if the interchangeable lens 3 receives a downward impact, the rear claw portion 390 below the second telecon-side second straight line L2 has a wide area, In addition, since the impact can be absorbed even by the biasing force of the plate springs 213 of the body side claws 290 facing each other, the impact resistance is high.

  When the corresponding lens 5 or the like is attached to the camera body 2, the body-side terminal holding portion 220 is disposed above the imaging element 270. In the state where the camera system 1 is held in the horizontal position, sunlight incident on the corresponding lens 5 etc. is incident on the lower side on the exit side of the corresponding lens 5 etc. In the present embodiment, since the body-side terminal holding portion 220 is disposed not on the lower side of the imaging device 270 but on the upper side, ghosting can be suppressed.

The four plate springs 213 are arranged at an interval of approximately 90 degrees around the optical axis O. Therefore, at least two leaf springs 213 of the four leaf springs 213 sandwich the optical axis O and are in contact with two protrusions, and the two protrusions are pressed in the + Z direction. In the present embodiment, although the teleconverter 3, the corresponding lens 5 or the non-corresponding lens 6 includes at least four protrusions, at least two protrusions may be formed even if one of the four protrusions is broken. Are disposed at opposing positions across the optical axis O, and therefore, they are pressed by two plate springs 213 disposed at opposing positions across the optical axis O. Therefore, it is possible to provide the camera system 1 in which the teleconverter 3, the corresponding lens 5 or the non-corresponding lens 6 can be mounted to 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 in the vicinity of the straight line B10 can be strongly pressed to the body side terminal.

  The screws 313 and 513 are disposed on the outer periphery on the rear end side of the mounting direction 44 of the claws. Further, at least a part of the screws 313 and 513 is disposed on the outer periphery of the claw portion. In the present embodiment, even if an external force is applied at the time of mounting, the external force can be received by the four claws. In addition, since at least a part of the screws 313 and 513 are disposed on the outer peripheral side of the claws, when external force is transmitted between the rear mount 310, the corresponding mount 510 and the fixing member in the corresponding lens, And four screws 313 and 513, respectively, to prevent the external force from being concentrated at a specific location. Since concentration of external force can be prevented, the fixing member, the rear side 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, it is necessary to increase the diameters of the reference surfaces 311 and 511 and the amount of protrusion of the claws by proportional expansion, but according to this embodiment, four claws 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 side mount 310 and the corresponding mount 510 increase, there is no need to proportionally enlarge the diameters of the reference surfaces 311 and 511 and the projection amount of the claws. It is possible to avoid upsizing of the non-compliant lens 6, the camera body 2, and the teleconverter 3.

The following variations are possible, and one or more variations may be combined with the above-described embodiment.
(Modification 1)
The smallest claw of the corresponding mount 510 can be omitted. As shown in FIG. 28, the second mount 710 from which the lens side fifth claw portion 590e of the corresponding mount 510 is omitted is a lens side first claw portion 790a to a lens side fourth claw portion 790d and a lens side first insertion and removal portion 780a. The lens side fourth insertion and removal portion 780d is provided. The lens side first claw portion 790a to the lens side fourth claw portion 790d are the lens first claw portion 590a, the lens side second claw portion 590b, the lens side fourth claw portion 590d, and the lens side fifth claw portion of the corresponding mount 510. It is substantially equivalent to 590e. The lens side first inserting and removing part 780a, the lens side second inserting and removing part 780b, and the lens side fourth inserting and removing part 780d are the lens side first inserting and removing part 580a of the corresponding mount 510, the lens side second inserting and removing part 580b, and the lens side fifth inserting and removing It is substantially equivalent to the part 580e. The circumferential length of the lens side third insertion and withdrawal portion 780c is equal to the circumferential length of the lens side third insertion and withdrawal portion 580c, the lens side third claw portion 590c, and the lens side fourth insertion and withdrawal portion 580d of the corresponding mount 510. It is the added length. The second mount 710 can be attached to either the camera body 2 or the teleconverter 3. Further, in a state where the second mount 710 is attached to the camera body 2 or the teleconverter 3, at least a part of the lens side first claw portion 790a to the lens side fourth claw portion 790d is biased from the plate springs 213 and 413. , The mounting is stable.

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

(Modification 3)
A portion of the claws 590, 390 of the corresponding mount 510 or the rear mount 310 may be cut out. There is no particular limitation on the shape and position of the cutout, but a position not receiving the biasing force 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 lens side first claw portion 990a to a lens side fourth claw portion 990d, a lens side first insertion and removal portion 980a to a lens side fourth insertion and removal portion 980d, and a notch 991. The lens side first claw portion 990 a to the lens side third claw portion 990 c are substantially the same as the rear side first claw portion 390 a to the rear side third claw portion 390 c of the rear mount 310. The lens side first inserting and removing part 980 a to the lens side fourth inserting and removing part 980 d are substantially the same as the rear side first inserting and removing part 380 a to the rear side fourth inserting and removing part 380 d. The lens side fourth claw portion 990 d is provided with a notch 991 from the inner periphery toward the outer periphery. The circumferential length of the lens side fourth claw 990 d is substantially the same as the circumferential length of the rear fourth claw 390 d 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 portion 990a to the lens side fourth claw portion 990d is biased by the plate spring 213, and the mounting is stabilized. Also, the notch 991 does not receive the biasing force from the plate spring 213. That is, one of the lens side fourth claw portions 990 d in the circumferential direction receives the biasing force from the plate spring 213, and the other in the circumferential direction of the lens side fourth claw portion 990 d does not receive the biasing force from the plate spring 213. Here, the lens side fourth claw portion 990d is divided into two in the circumferential direction by the notch 991, but in a state where the lens side fourth claw portion 990d is mounted on the camera body 2, the notch 991 of the lens side fourth claw portion 990d in the circumferential direction The regions on both sides face the body-side fourth claw portion 290 d or the front fourth claw portion 490 d. As described above, a region facing one body side claw in a mounted state is taken as one lens side claw.
In addition, as the notch 991, the claw portion may be cut so as to be divided into two or more in the circumferential direction, or may be cut so as to lack a portion of the claw portion, and the diameter of at least a portion of the claw portion You may cut so that the length of direction may become short. In addition, the claw portion may cut out a part of a 45-degree straight line (on the straight lines L3, L4, L7, and L8) from the straight line passing the optical axis O and the center of the terminal holding portion.

(Modification 4)
Although the back side mount 310 is substantially equivalent to the non-correspondence mount 610, the back side mount 310 may be substantially equivalent to the correspondence mount 510. A teleconverter in which the rear mount 310 is substantially equivalent to the corresponding mount 510 can be mounted on either 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 in the three lens side claws, since the leaf springs 213 of the camera body 2 are arranged at intervals of 90 degrees around the optical axis O, the lens side claws can be pressed from at least three leaf springs 213 It can be worn in

  Two of the four lens side claws 590 facing each other across the optical axis O may be removed, and two lens side claws facing each other across the optical axis O may be provided. Even with the two lens side claws, they face each other across the optical axis O, and since the leaf springs of the camera body 2 are disposed at intervals of 90 degrees around the optical axis, they face each other at least across the optical axis O The lens side claw portion is pressed from the leaf spring 213 and can be mounted in a usable state. When two lens side claws facing each other across the optical axis O are provided, one of the two lens side claws is disposed at a position near the center of the lens side terminal holding portion 520. Is preferred. By placing the lens claw at a position close to the center of the lens side terminal holding portion 520 and bringing it into contact with the plate spring 213, the lens side terminal and the body side terminal can be brought into contact to properly use the camera system 1. it can.

  There is no particular limitation on the material of the corresponding mount 510, and it may be metal or resin. In addition, the end of the corresponding mount 510 (the outer peripheral end of the lens side claw 590, the circumferential end of the lens side claw 590, the end of the cylindrical portion 512 in the optical axis O direction, etc.) is at least partially inclined You may form. The end of the corresponding mount 510 may not be inclined, and may have a step.

There is no limitation in particular in the shape of the lens side terminal holding part 520, It can change suitably. In particular, by inclining the circumferential end of the lens-side terminal holding portion 520, the contact with the body-side terminal holding portion 220 when rotating from the insertion position to the mounting position can be smoothly performed.
In addition, although the lens side terminal holding portion 520 is provided with a plurality of lens side terminals arranged in an arc shape, the position of the lens side terminal in a range where the interchangeable lens 3 contacts the body side terminal when mounted on the camera body 2 You may shift it.

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

  The lens side claws 590 other than the rear side claw portion 390 or the lens side third claw portion 590c are contacted by the plate springs 213 and 413 and urged in a direction away from the body side claw portion 290 or the front side claw portion 490 It has a biased part as a part. The shape of the biasing portion may be any shape as long as sufficient biasing force can be received from the leaf springs 213 and 413, and the contact between the leaf springs 213 and 413 and the biasing portion may be point contact, line contact, or surface contact. Good. The shape and material of the plate springs 213 and 413 may be changed as appropriate as long as the opposing claws can be pressed sufficiently. Further, the one or two leaf springs 213 and 413 and the claws facing it may be at least opposed at the time of completion of mounting, and they do not always have to be always in contact. For example, when the camera system 1 receives an external force, the leaf springs 213 and 413 may not contact with the claws. The biasing force that the claws receive from the plate springs 213 and 413 does not have to be constant at all times, and may be changed according to the external force received by the camera system 1.

The claws facing each other at the time of mounting need not have the same circumferential length, and the circumferential length of the lens side claws 590 other than the rear side claws 390 or the lens side third claws 590c is , And can be changed in a range in which the plate spring 213 can be pressed. In addition, it is not necessary for the entire surface of one claw to face the entire surface of the other claw at the time of mounting, and the position of the circumferential end of one claw is different from the position of the circumferential end of the other claw It may be
Further, it is not necessary to make the lengths in the circumferential direction substantially coincide with the claws and the corresponding insertion / extraction parts, and the circumferential length of the claws to be inserted with respect to the circumferential length of the insertion / extraction parts is It should be less than that.

Further, the circumferential length of the rear first claw portion 390a may be changed in the range of passing through the body side first insertion and removal portion 280a corresponding to the time of insertion. The same applies to the second rear claw portion 390b, the third rear claw portion 390c, and the fourth rear claw portion 390d.
Furthermore, the thickness in the radial direction of the cylindrical portion 312 can be changed as appropriate, and at least a portion of the cylindrical portion 312 may protrude inward from the cylindrical portion 312 of the present embodiment.

  In the present embodiment, the teleconverter 3 is 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 modifications have been described above, the present invention is not limited to these contents. Other embodiments considered within the scope of the technical idea of the present invention are also included within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Camera system, 2 ... Camera body, 3 ... Teleconverter, 5 ... Correspondence lens, 6 ... Non-correspondence 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 portion, 270: Imaging element, 280: Body side insertion and removal portion, 290: Body side claw portion, 310: Rear side mount, 311: Reference surface, 312 , 512: cylindrical portion, 320: rear terminal holding portion, 370: lens, 380: rear insertion and removal portion, 390: rear claw portion, 410: front mount, 415: projection, 420: front terminal holding portion, 480 ... Front side insertion / extraction portion, 490 ... Front side claw portion, 510 ... Corresponding mount, 520 ... Lens side terminal holding portion, 560, 660 ... Imaging optical system, 580 ... Lens side insertion / extraction portion, 590 ... Lens Nails, B1 to B4 ... body side reference lines (first to fourth straight lines), B5 to B8 ... telecon side reference lines, B10 ... straight lines, L1 to L4 ... telecon side reference lines (first to fourth straight lines), L5 to L8: Lens side reference line, O: Optical axis

Claims (10)

An imaging element subject light is incident, a body-side terminal group that includes a plurality of body side terminal that is disposed on top of the imaging device upon holding the camera body in the horizontal position, located outside of the body-side terminal group An annular body-side mount, a plurality of body-side protrusions respectively projecting inward from the body-side mount, and four elastic members respectively disposed on the image side of the plurality of body-side protrusions An interchangeable lens detachable from a camera body provided
A lens side mount in contact with the body side mount;
A fixing member provided inside the interchangeable lens and to which the lens side mount is fixed;
A cylindrical portion extending in an optical axis direction of the interchangeable lens from an inner peripheral edge portion of the lens side mount;
A lens-side terminal group disposed inside a partial area of the cylindrical portion and in contact with the body-side terminal group biased in the optical axis direction when mounted on the camera body;
And a plurality of lens-side protrusions that protrude outward from the cylindrical portion and extend in the circumferential direction of the cylindrical portion;
Of the circumferential end of each of the plurality of lens side protrusions, only one end is located outside the partial region,
Each of the plurality of lens side protrusions includes an opposing portion that faces the four elastic members when the interchangeable lens is mounted on the camera body,
The lens side mount is fixed to the fixing member by at least four screws,
The interchangeable lens, wherein the four screws are respectively disposed on one side in the circumferential direction of the facing portion outside the facing portion of the plurality of lens side protrusions . An imaging element on which subject light is incident, a body-side terminal group including a plurality of body-side terminals disposed above the imaging element when the camera body is held in a lateral position, and an outside of the body-side terminal group An annular body-side mount, a plurality of body-side protrusions respectively projecting inward from the body-side mount, and four elastic members respectively disposed on the image side of the plurality of body-side protrusions An interchangeable lens detachable from a camera body provided
A lens side mount in contact with the body side mount;
A fixing member provided inside the interchangeable lens and to which the lens side mount is fixed;
A cylindrical portion extending in an optical axis direction of the interchangeable lens from an inner peripheral edge portion of the lens side mount;
A lens-side terminal group disposed inside a partial area of the cylindrical portion and in contact with the body-side terminal group biased in the optical axis direction when mounted on the camera body;
And a plurality of lens-side protrusions that protrude outward from the cylindrical portion and extend in the circumferential direction of the cylindrical portion;
The plurality of lens side protrusions include a first lens side protrusion and a third lens side protrusion.
The first lens side protrusion of the plurality of lens side protrusions is disposed outside the partial region and on one side in the circumferential direction,
In the insertion position where the plurality of lens side protrusions are inserted between the corresponding plurality of body side protrusions on the other side of the partial region and on the other side in the circumferential direction A lens-side second insertion / extraction portion in which the first body-side projection closest to the center of the body-side terminal group among the body-side projections is inserted / removed;
Each of the plurality of lens side protrusions includes an opposing portion that faces the four elastic members when the interchangeable lens is mounted on the camera body ,
The lens side mount is fixed to the fixing member by at least four screws,
The interchangeable lens, wherein the four screws are respectively disposed on one side in the circumferential direction of the facing portion outside the facing portion of the plurality of lens side protrusions.   An angle formed by a straight line connecting one end of the lens side terminal group in the circumferential direction to the optical axis and a straight line connecting the other end of the lens side terminal group in the circumferential direction to the optical axis is An angle between a straight line connecting one end of the lens side protrusion in the circumferential direction and the optical axis, and a straight line connecting the other end of the circumferential direction of the first lens side protrusion and the optical axis, and a lens An angle between a straight line connecting one end of the side second inserting and removing part in the circumferential direction to the optical axis and a straight line connecting the other end of the second lens side inserting and removing part in the circumferential direction to the optical axis The interchangeable lens according to claim 2, which is smaller than the combined angle.   The lens side second straight line orthogonal to the lens side first straight line passing through the center of the lens side terminal group and the optical axis and the lens side first straight line orthogonal to the optical axis when the lens side mount is viewed from the camera body side The interchangeable lens according to any one of claims 1 to 3, wherein both ends in the circumferential direction of the plurality of lens side protrusions are respectively disposed in each of four regions divided by .   5. The lens-side terminal group according to claim 1, wherein the lens-side terminal group is disposed between a straight line connecting the center of the lens-side terminal group and the optical axis and two straight lines intersecting at approximately 45 degrees in the optical axis. The interchangeable lens according to one or more items.   The plurality of lens side protrusions include a second lens side protrusion and a fourth lens side protrusion.
  The length in the circumferential direction of the second lens side protrusion is the first body side protrusion closest to the center of the body side terminal group among the plurality of body side protrusions, and the plurality of body side protrusions Shorter than the circumferential length between the second body side projecting portion closest to the center and the second body side projecting portion,
  The circumferential length of each of the first lens side protrusion, the third lens side protrusion and the fourth lens side protrusion is the same as that of the first body side protrusion and the second body side protrusion. The interchangeable lens according to any one of claims 2 to 5, which is longer than the length in the circumferential direction between the two.   The interchangeable lens faces each of the body side protrusions corresponding to the plurality of lens side protrusions from an insertion position where the plurality of lens side protrusions are inserted between the corresponding plurality of body side protrusions. 7. The camera body according to claim 1, wherein the camera body is mounted on the camera body by rotating the camera at a predetermined position on the optical axis by a first angle in a first direction in a plane substantially orthogonal to the optical axis. The interchangeable lens described in the item. At least two of the plurality of lens-side protrusions are at least one of the plurality of body-side protrusions at a misinsertion position where the circumferential position about the optical axis is different from the insertion position. The interchangeable lens according to claim 7, which abuts on two . At the erroneous insertion position where the circumferential position centering on the optical axis is different from the insertion position, any one of the plurality of lens side protrusions is the one of the plurality of body side protrusions. Of the plurality of body-side protrusions, the second-body-side protrusion closest to the center and the second-body-side protrusion are in contact with the first body-side protrusion closest to the center of the body-side terminal group The interchangeable lens according to claim 7 or 8, which is not inserted between . The exchange according to any one of claims 1 to 9, wherein at least two of the four screws are respectively disposed on the outer peripheral side of two of the plurality of lens side protrusions. lens.

Images