JP2019203988A - Mount device and imaging apparatus - Google Patents

Abstract

To suppress the occurrence of backlash in such a state that an accessory is attached, while suppressing size increase.SOLUTION: A mount device 300 to/from which an interchangeable lens 200 is attached/detached includes a fixed mount member 310 which is fastened to a fixed member 120 having a fastening hole and a movable mount member 320 which is screwed with the fixed mount member 310. The fixed mount member 310 includes a mount surface 311 which comes into contact with the interchangeable lens and a male screw part 313. The movable mount member 320 includes mount pawl parts 321a to 321c which are engaged with the mount pawl parts 240a to 240c of the interchangeable lens 200 and a female screw part 323 which is screwed with the male screw part 313. In the fixed mount member 310, in the mount surface 311, through-holes 317a to 317d are formed in a position corresponding to the fastening hole of the fixed member 120 and the male screw part 313 is provided on the outer peripheral side of the through-holes 317a to 317d.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a mount device and an imaging device for attaching / detaching accessories such as an interchangeable lens and a lens adapter.

  2. Description of the Related Art There are known imaging devices in which various lenses (hereinafter referred to as “interchangeable lenses”) such as a single focus lens, a zoom lens, a wide angle lens, a telephoto lens, and a macro lens can be attached and detached. A so-called bayonet coupling method is widely used as a mounting device method for detachably attaching an accessory for an imaging device such as an interchangeable lens and a lens adapter to the imaging device body.

  However, in the bayonet coupling method, the interchangeable lens is locked and held by the urging force of the urging member such as a leaf spring, so that there is a problem that the accessory shakes with respect to the imaging device main body according to the amount of bending of the spring member. . In particular, when a large interchangeable lens or the like is attached to the imaging apparatus main body, rattling is likely to occur due to the weight of the interchangeable lens. If the optical axis of the accessory deviates from the central axis of the mount device due to such rattling between the accessory and the imaging apparatus main body, the image quality of the captured image is degraded. Therefore, Patent Document 1 proposes a movable mechanism that moves the interchangeable lens to the imaging device side as a configuration in which the bayonet-type mounting device provided in the imaging device is separated into a fixed mount portion and a movable mount portion.

JP 2013-218149 A

  However, in the mounting device described in Patent Document 1, since the fastening portion for the movable mechanism and the imaging device main body is provided on the outer side in the radial direction of the contact surface (mounting surface) on the accessory side, the entire mounting device is increased in size. End up.

  An object of this invention is to provide the mount apparatus which can suppress generation | occurrence | production of shakiness in the state which attached the accessory, suppressing an enlargement.

  A mount device according to the present invention is a mount device to which an accessory is attached and detached, and includes a substantially annular fixed mount portion fastened to a fixed portion, and a substantially annular movable mount portion screwed with the fixed mount portion. The fixed mount portion includes a mount surface that contacts the accessory, and a first threaded portion, and the movable mount portion includes an engaged portion that engages with the engagement portion of the accessory. And a second threaded part that is threadedly engaged with the first threaded part, wherein a fastening part for the fixed part is formed on the mount surface in the fixed mount part, and the first The screwing portion is provided on the outer peripheral side of the fastening portion.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the enlargement of a mounting apparatus, generation | occurrence | production of the shakiness in the state in which the accessory was mounted | worn can be suppressed.

It is a disassembled perspective view which shows the structure of the mounting apparatus which concerns on embodiment of this invention, and its peripheral component. It is the perspective view which looked at the interchangeable lens which can be attached or detached to a mounting apparatus from the back side. It is a disassembled perspective view of a mounting apparatus. It is a rear view of the movable mount member which comprises a mount apparatus. It is a perspective view which expands and shows the rotation prevention convex member which comprises a mount apparatus, and its periphery. It is a front view which shows the state which fixed the mounting apparatus to the fixing member. It is sectional drawing of arrow AA and arrow BB shown in FIG. It is a schematic diagram explaining the contact operation of the interchangeable lens with respect to a mounting apparatus. It is a perspective view explaining fixation operation of the interchangeable lens with respect to a mount apparatus. It is sectional drawing explaining the fixing operation of the interchangeable lens with respect to a mounting apparatus. It is a perspective view explaining the movement of the detection switch in the fixing operation. It is a perspective view which shows the structure of a fixing member. It is a perspective view which shows the state of a movable mount member, an operation member, and a fixed member. It is sectional drawing which shows the state of the movable mount member in the rotation limit position of a movable mount member, an operation member, and a fixed member. It is a disassembled perspective view explaining arrangement | positioning of the thin-plate material with respect to a fixed mount member. It is a disassembled perspective view which shows the structure of the mounting apparatus which concerns on another embodiment, and its periphery component. It is a disassembled perspective view of the mounting apparatus which concerns on another embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, a mount device (so-called lens mount) provided in the image pickup apparatus body in order to attach / detach the interchangeable lens to / from the image pickup apparatus body will be described.

  FIG. 1 is an exploded perspective view showing the structure of a mounting device and its peripheral components according to an embodiment of the present invention. FIG. 1 shows the interchangeable lens 200, the mounting device 300, the electrical contact member 130, the rotation detection substrate 370, and the fixing member 120. The interchangeable lens 200 is an example of an accessory that can be attached to and detached from the mount device 300, and a method for attaching and detaching the same will be described later.

  The mounting apparatus 300 is fixed to the fixing member 120. The electrical contact member 130 includes a terminal portion 131 and is fixed to the fixing member 120. The rotation detection board 370 includes a detection switch 371 and is fixed to the fixing member 120. The fixing member 120 is fixed to the imaging device main body (not shown) and holds an imaging element (not shown). In the following description, the interchangeable lens 200 side is referred to as the front or the front, and the fixing member 120 side is referred to as the back or the back.

  FIG. 2 is a perspective view of the interchangeable lens 200 as seen from the back side. The interchangeable lens 200 includes an electrical contact part 220, a mount surface 230, mount claw parts 240 a to 240 c (engagement parts), a cylindrical shaft part 250, a rotation stopper recess 260, and an elastic member 270. The elastic member 270 is a rubber O-ring disposed on the outer periphery of the mount surface 230. The functions and the like of other parts will be described when the operation when the interchangeable lens 200 is attached to the mount device 300 is described.

  FIG. 3 is an exploded perspective view of the mounting device 300. 3A and 3B is an optical axis of the mounting apparatus 300 and passes through the center of the optical path of the mounting apparatus 300. The mount device 300 includes a fixed mount member 310, a movable mount member 320, a rotation-preventing convex member 330, an urging member 335, a pressing member 340, an operation member 350, and thin plate members 360a and 360c.

  The fixed mount member 310 has a substantially annular shape, and includes a mount surface 311, an elastic member contact surface 312, a male screw portion 313 (first screwing portion), a cylindrical hole portion 314, a rotation stop hole portion 316, and a through hole 317 a. ˜317d and an engagement hole 318. The through holes 317 a to 317 d are provided on the mount surface 311. The male screw portion 313 is provided on the outer peripheral side of the through holes 317a to 317d in the optical axis projection (when viewed from the optical axis direction). The mounting device 300 is fixed to the fixing member 120 by passing screws (not shown) through the through holes 317 a to 317 d and fastening the screws to the fixing member 120.

  The elastic member contact surface 312 is provided on the outer periphery of the mount surface 311 in terms of optical axis projection. The operation member 350 includes a knob portion 351, a rotation detected portion 352, and through holes 353a to 353c. The operation member 350 is fixed to the movable mount member 320 by passing screws through the through holes 353 a to 353 c and fastening the screws to the movable mount member 320. Although the details will be described later, the thin plate members 360a and 360c are fixed to a surface opposite to the mount surface 311 of the fixed mount member 310 by screws (not shown).

  FIG. 4 is a rear view of the movable mount member 320. The movable mount member 320 has a substantially annular shape, and includes an inner ring portion 320a, an outer ring portion 320b, a first coupling portion 326a, a second coupling portion 326b, projecting portions 329b and 329c, and operation member fastening holes 328a to 328a. 328c. The inner ring portion 320a is disposed inside the outer ring portion 320b, and is coupled in the radial direction by the first coupling portion 326a and the second coupling portion 326b. The second coupling portion 326b has a first flat portion 327a and a second flat portion 327b whose both ends are flat. Although the details of the first flat surface portion 327a and the second flat surface portion 327b will be described later, the movable mount member 320 is arranged in accordance with the positional relationship between the first rotation stop portion 122a and the second rotation stop portion 122b of the fixed member 120. It is a contact part which plays the role which prescribes | regulates the amount of rotations.

  Mount claw portions 321a to 321c (engaged portions) that engage with the mount claw portions 240a to 240c are provided on the inner peripheral side of the inner ring portion 320a. An engagement shaft portion 325 is provided on the outer peripheral portion of the inner ring portion 320a. A female screw portion 323 (second screwing portion) is provided on the inner peripheral portion of the outer ring portion 320b. The protruding portions 329b and 329c are provided between the first coupling portion 326a and the second coupling portion 326b in the outer ring portion 320b, and have a shape protruding toward the inner ring portion 320a. The operating member fastening hole 328a is provided in the first coupling portion 326a, the operating member fastening hole 328b is provided in the protruding portion 329b, and the operating member fastening hole 328c is provided in the protruding portion 329c. The operation member 350 is fixed to the movable mount member 320 by fastening the screws inserted through the through holes 353a to 353c into the operation member fastening holes 328a to 328c.

  FIG. 5 is an enlarged perspective view showing the rotation preventing convex member 330 and its periphery. FIG. 6 is a front view showing a state in which the mounting apparatus 300 is fixed to the fixing member 120. FIG. 7A is a cross-sectional view taken along the line AA shown in FIG. 7, and shows a cross section at the position of the rotation preventing convex member 330. FIG. 7B is a cross-sectional view taken along the line BB shown in FIG. 7 and shows a cross section at the position of the through hole 317a.

  As shown in FIG. 7B, the female screw portion 323 of the movable mount member 320 is screwed with the male screw portion 313 of the fixed mount member 310. Accordingly, when the movable mount member 320 is rotated around the optical axis, the depth at which the female screw portion 323 and the male screw portion 313 are screwed changes according to the rotation direction, and the movable mount member 320 is fixed to the fixed mount member 310. On the other hand, it is structured to move in the optical axis direction. The engagement shaft portion 325 of the movable mount member 320 engages with the engagement hole portion 318 of the fixed mount member 310. Thereby, the position of the movable mount member 320 with respect to the fixed mount member 310 is stabilized. A screw 301a is inserted into the through hole 317a. When the screw 301a is fastened to the fixing member 120, the fixing mount member 310 is fixed to the fixing member 120 with the thin plate member 360a interposed therebetween.

  As shown in FIGS. 5 and 7A, the rotation preventing convex member 330 has a first convex portion 331 and a second convex portion 332. The first protrusion 331 is engaged with the rotation stop hole 316 and protrudes from the mount surface 311. The second convex portion 332 engages with the biasing member 335. The urging member 335 urges the rotation preventing convex member 330 in a direction protruding from the mount surface 311. The pressing member 340 includes a rotation stop hole 341 and a through hole 342. The rotation stop hole portion 341 engages with the second convex portion 332. Screws (not shown) are inserted into the through holes 342, and the screws are fastened to the fixed mount member 310, whereby the pressing member 340 is fixed to the fixed mount member 310. With such a configuration, the rotation-preventing convex member 330 is held so as to be freely pressed in the optical axis direction with respect to the fixed mount member 310.

  Next, a method for attaching the interchangeable lens 200 to the mount device 300 will be described. The interchangeable lens 200 can be attached in two stages: a contact operation with respect to the mount device 300 and a fixing operation from the contact state. FIG. 8 is a schematic diagram for explaining the contact operation of the interchangeable lens 200 with respect to the mount device 300, and is a partial perspective view of the state before the contact operation is performed when the interchangeable lens 200 and the mount device 300 are viewed from the back side. Is shown.

  In the contact operation, the rotation-preventing concave portion 260 of the interchangeable lens 200 and the first convex portion 331 of the rotation-preventing convex member 330 are fitted. Subsequently, the cylindrical shaft portion 250 of the interchangeable lens 200 and the cylindrical hole portion 314 of the mount device 300 are fitted. By inserting the interchangeable lens 200 in the posture state of FIG. 8 with respect to the mounting device 300, these two fitting portions can be fitted.

  Then, the mount surface 230 of the interchangeable lens 200 and the mount surface 311 of the mount apparatus 300 are brought into contact with each other. Here, if the interchangeable lens 200 is in a posture shifted from the posture of FIG. 8 around the optical axis, the first convex portion 331 and the rotation stop concave portion 260 are not fitted. However, since the rotation stop convex member 330 can be pressed down, it is pressed down by the mount surface 230 of the interchangeable lens 200. Therefore, the cylindrical shaft portion 250 and the cylindrical hole portion 314 can be fitted even when the first convex portion 331 and the rotation stopper concave portion 260 are not fitted.

  When the cylindrical shaft portion 250 and the cylindrical hole portion 314 are fitted, the mount surface 230 of the interchangeable lens 200 and the mount surface 311 of the mount device 300 (fixed mount member 310) are in contact with each other. By rotating the interchangeable lens 200 with respect to the mount device 300 in this state, the rotation stop recess 260 can be moved to a position where the rotation stop recess 260 is fitted to the rotation stop protrusion 330. When the rotation stop concave portion 260 moves to the position of the rotation stop convex member 330 in this way, the rotation stop convex member 330 that has been pushed down by the mount surface 230 of the interchangeable lens 200 and retracted to the mount surface 311 of the mount device 300 is removed from the mount surface 311. Protruding. Thereby, the rotation stopper convex member 330 is fitted to the rotation stopper recess 260.

  Note that the electrical contact portion 220 of the interchangeable lens 200 and the contact terminal portion of the electrical contact member 130 rub against each other by the operation of rotating the interchangeable lens 200 with respect to the mounting device 300. Thereby, the self-cleaning effect which removes the impurities adhering to the contact terminal portion is obtained, and the contact reliability of the contact terminal portion can be ensured.

  When the anti-rotation convex member 330 and the anti-rotation concave portion 260 are fitted, the interchangeable lens 200 cannot rotate with respect to the mount device 300. However, since the interchangeable lens 200 is not fixed to the mount device 300 in the optical axis direction, the contact state is easily released when the interchangeable lens 200 is moved away from the mount device 300 in the optical axis direction. can do.

  FIGS. 9A to 9C are perspective views for explaining the fixing operation of the interchangeable lens 200 to the mount device 300. FIG. 10A to 10C are cross-sectional views corresponding to FIGS. 9A to 9C. FIGS. 11A to 11C are perspective views for explaining the movement of the detection switch 371 corresponding to FIGS. 9A to 9C.

  9A, 10A, and 11A show a state in which the mount surface 230 of the interchangeable lens 200 before the fixing operation is in contact with the mount surface 311 of the mount apparatus 300. FIG. In this state, the mount claw portions 240a to 240c of the interchangeable lens 200 and the mount claw portions 321a to 321c of the movable mount member 320 of the mount device 300 do not overlap each other on the optical axis projection.

  Here, the detection switch 371 of the rotation detection board 370 has a detection movable portion 371a, and when the detection movable portion 371a is pressed, the detection switch 371 enters a detection state. In this embodiment, when the detection switch 371 is in the detection state, electrical communication is performed between the interchangeable lens 200 and the imaging apparatus main body through the electrical contact unit 220 and the electrical contact member 130. In the state of FIG. 11A, the detection movable part 371a is not pressed by the rotation detected part 352, and is therefore in a non-detection state. For this reason, as shown in FIG. 10A, the terminal portion 131 of the electrical contact member 130 is in contact with the electrical contact portion 220 of the interchangeable lens. In this state, electrical communication through the electrical contact portion 220 and the electrical contact member 130 is performed. Is not done.

  The elastic member 270 of the interchangeable lens 200 is in pressure contact with the elastic member contact surface 312 of the mount device 300. As shown in FIGS. 3A and 7B, the through holes 317 a to 317 d are arranged on the inner peripheral side of the male screw portion 313. If the through holes 317 a to 317 d are provided on the outer peripheral side of the male screw portion 313, the through holes 317 a to 317 d are positioned on the elastic member contact surface 312, and irregularities are generated on the elastic member contact surface 312. In the configuration of this embodiment, the elastic member contact surface 312 is not provided with the through holes 317a to 317d, so that the elastic member contact surface 312 is a smooth surface without unevenness. When the elastic member contact surface 312 is uneven, it is difficult to ensure the sealing between the interchangeable lens 200 and the mounting device 300 by the elastic member 270. On the other hand, since the elastic member contact surface 312 is formed as a smooth surface without unevenness, it is possible to ensure sealing between the interchangeable lens 200 and the mount device 300 by the pressure contact of the elastic member 270.

  FIGS. 9B, 10 </ b> B, and 11 </ b> B show a state during the fixing operation of the interchangeable lens 200 with respect to the mount device 300. 9A, the knob portion 351 of the mounting apparatus 300 is rotated counterclockwise around the optical axis when viewed from the front side of the mounting apparatus 300. Since the operation member 350 provided with the knob portion 351 is fastened to the movable mount member 320, the movable mount member 320 rotates around the optical axis as the knob portion 351 rotates. Thereby, the mount claw parts 240a to 240c of the interchangeable lens 200 and the mount claw parts 321a to 321c of the mount apparatus 300 start to overlap on the optical axis projection.

  Here, the internal thread portion 323 of the movable mount member 320 is screwed with the external thread portion 313 of the fixed mount member 310. The threaded portion has a reverse thread shape, and the movable mount member 320 moves toward the back side with respect to the fixed mount member 310 by rotating counterclockwise as viewed from the front side. At this time, a gap G exists between the mount claw portion 321b of the mount device 300 and the mount claw portion 240b of the interchangeable lens 200. Although not shown, similarly, similar gaps exist between the mount claw portion 321a and the mount claw portion 240a and between the mount claw portion 321c and the mount claw portion 240c. In other words, only the size of the gap G is generated between the interchangeable lens 200 and the mount device 300.

  In this state, as shown in FIG. 11B, the detection switch 371 is in a detection state because the detection movable portion 371a is pressed by the step shape of the rotation detection portion 352 of the operation member 350. Therefore, electrical communication is performed between the interchangeable lens 200 and the imaging apparatus main body through the electrical contact part 220 and the electrical contact member 130.

  FIGS. 9C, 10C, and 11C show a state in which the interchangeable lens 200 has been fixed to the mount device 300. FIG. The knob 351 of the mount device 300 is further rotated in the counterclockwise direction around the optical axis as viewed from the front of the mount device 300 as compared with the state of FIG. Then, the movable mount member 320 moves further to the back side than the state of FIG. 9B with respect to the fixed mount member 310 by screwing of the female screw portion 323 and the male screw portion 313. Thereby, the mount claw part 321b of the mount apparatus 300 and the mount claw part 240b of the interchangeable lens 200 contact | abut. Similarly, the mount claw portion 321a and the mount claw portion 240a abut, and the mount claw portion 321c and the mount claw portion 240c also abut. Therefore, there is no gap between the mount claw portions 321a to 321c and the mount claw portions 240a to 240c.

  In this manner, the interchangeable lens 200 is pulled toward the mount device 300 by using a screw tightening force generated by rotating the movable mount member 320 with respect to the fixed mount member 310. Thereby, the interchangeable lens 200 can be fixed (attached) to the mounting device 300 without rattling.

  In the state of FIG. 11C, as in the state of FIG. 11B, the detection switch 371 is in a detection state because the detection movable portion 371a is pressed by the rotation detected portion 352 of the operation member 350. ing. Therefore, electrical communication is performed between the interchangeable lens 200 and the imaging apparatus main body through the electrical contact part 220 and the electrical contact member 130.

  Next, the relationship of the operations of the mount device 300, the operation member 350, and the fixing member 120 when the interchangeable lens 200 is attached to the mount device 300 will be described. FIG. 12A is a perspective view showing the entire structure of the fixing member 120. FIG. 12B is a perspective view showing the fixing member 120 partially enlarged. FIGS. 13A to 13C are perspective views showing the states of the movable mount member 320, the operation member 350, and the fixed member 120, respectively, corresponding to FIGS. 9A to 9C.

  As shown in FIG. 12A, the fixing member 120 has screw boss portions 121a to 121d (projections). The screws inserted into the through holes 317 a to 317 d formed in the fixed mount member 310 of the mount device 300 are fastened to the screw boss portions 121 a to 121 d, whereby the mount device 300 is fixed to the fixed member 120. As illustrated in FIG. 12B, the fixed member 120 includes a first rotation stop portion 122 a and a second rotation stop portion 122 b as engagement portions that restrict the rotation amount of the movable mount member 320. In each state of FIGS. 13A to 13C, the screw boss portions 121 a to 121 d are located between the inner ring portion 320 a and the outer ring portion 320 b of the movable mount member 320, but do not contact the movable mount member 320. It is arranged.

  The rotation range of the movable mount member 320 and the operation member 350 is defined by the first rotation stop portion 122a, the second rotation stop portion 122b, the first plane portion 327a, and the second plane portion 327b. FIG. 14 is a cross-sectional view showing the state of the movable mount member 320, the operation member 350, and the fixed member 120 at the rotation limit position of the movable mount member 320. FIG. 14A shows a position where the movable mount member 320 is rotated to the maximum in the clockwise direction when viewed from the front side. In this state, the first flat portion 327a and the fixed member of the movable mount member 320 are shown. 120 first rotation stoppers 122a abut. FIG. 14B shows a position where the movable mount member 320 has been rotated counterclockwise to the maximum when viewed from the front side. In this state, the second flat surface portion 327b of the movable mount member 320 and the fixed member are shown. The 120 second anti-rotation part 122b contacts. The states of FIGS. 9A to 9C are states at the rotational position between FIGS. 14A and 14B.

  As shown in FIGS. 13A to 13C, the screw boss portions 121a to 121d are inserted (convex) between the outer periphery of the inner ring portion 320a and the outer periphery of the outer ring portion 320b of the movable mount member 320. The movable mount member 320 is not brought into contact with any part other than the abutting portion described above. The first coupling portion 326a and the protruding portions 329b and 329c of the movable mount member 320 are fixed to the fixed member 120 regardless of the rotation limit position shown in FIGS. Do not touch.

  As described above, the fixed mount member 310 and the fixed member 120 are fastened by screws (fastening members) using the through holes 317a to 317d and the screw boss portions 121a to 121d as fastening portions. In the mounting apparatus 300, these fastening portions are arranged on the inner peripheral side with respect to the screwed portion between the male screw portion 313 of the fixed mount member 310 and the female screw portion 323 of the movable mount member 320, and then the necessary mounting portion 320 is necessary. It is possible to secure the amount of rotation.

  Next, functions of the thin plate materials 360a and 360c will be described. FIG. 15 is an exploded perspective view for explaining the arrangement of the thin plate members 360 a and 360 c with respect to the fixed mount member 310. The thin plate member 360a has an arc shape (bow shape), and has a first through hole 361a and second through holes 362a and 362b. The thin plate member 360c has an arc shape (bow shape), and includes a first through hole 361c and second through holes 362c and 362d. Screws (not shown) are inserted into the first through holes 361a and 361c, and these screws are fastened to the thin plate material fastening portions 319a and 319c of the fixed mount member 310. Screws (not shown) inserted into the through holes 317 a to 317 d of the fixed mount member 310 are also inserted through the second through holes 362 a to 362 d and fastened to the screw boss portions 121 a to 121 d of the fixed member 120.

  Therefore, the distance between the mount surface 311 of the mount device 300 and the screw boss portions 121a to 121d of the fixing member 120 can be adjusted by changing the thicknesses of the thin plate members 360a and 360c. That is, the distance between the imaging element (not shown) held by the fixing member 120 and the mount surface 311 can be adjusted. In that case, the angle of the mount surface 311 with respect to the image sensor can be adjusted by using different materials for the thin plate material 360a and the thin plate material 360c. The thin plate members 360a and 360c are not necessarily arranged between the fixed mount member 310 and the fixed member 120, and the thin plate members 360a and 360c may not be arranged.

  As shown in FIG. 15, the thin plate members 360 a and 360 c can be assembled to the fixed mount member 310 while avoiding the movable mount member 320. Further, in a state where the mount device 300 is not fastened to the fixing member 120, the thin plate materials 360 a and 360 c can be assembled to the fixed mount member 310 and can be detached from the fixed mount member 310.

  Incidentally, another mounting device (mounting device) can be attached to the fixing member 120 instead of the mounting device 300 described above. Next, another mounting device that can be attached to the fixing member 120 will be described.

  FIG. 16 is an exploded perspective view showing structures of a mounting device 1300 that is a mounting device according to another embodiment of the present invention and its peripheral components. The interchangeable lens 200, the electrical contact member 130, the rotation detection board 370, and the fixing member 120 shown in FIG. 16 are the same as those shown in FIG. FIGS. 17A and 17B are exploded perspective views of the mounting device 1300. FIG. The mounting device 1300 is a bayonet type mounting device. The mount device 1300 includes a mount member 150, a biasing member 160, a rotation-preventing convex member 170, a biasing member 175, an operation member 180, a biasing member 188, and an annular member 190.

  The mount member 150 includes a mount surface 151, mount claw portions 152a to 152c, through holes 153a to 153d, a hole portion 154, and a cylindrical hole portion 155. The biasing member 160 includes biasing portions 161a to 161c. Leaf springs are used for the urging portions 161a to 161c. The rotation preventing convex member 170 includes a first convex portion 171, a second convex portion 172, and an arm portion 173. The first protrusion 171 engages with the hole 154 of the mount member 150 and protrudes from the mount surface 151.

  A compression spring is used for the urging member 175. The urging member 175 engages with the second convex portion 172 and urges the rotation-preventing convex member 170 in a direction in which it protrudes from the mount surface 151. The operation member 180 includes an operation unit 181, an arm unit 182, and a shaft unit 183. The arm portion 182 presses the arm portion 173 in conjunction with the operation of pressing the operation member 180. A compression spring is used for the urging member 188. The biasing member 188 is engaged with the shaft portion 183 and biases the operation member 180 in a direction in which the operation member 180 protrudes from the imaging device 1100.

  The annular member 190 includes a first hole 191, a second hole 192, through holes 193 a to 193 d, and a rotation detection unit 194. The first hole portion 191 engages with the second convex portion 172. The second hole portion 192 engages with the shaft portion 183. By arranging the through holes 317a to 317d (see FIG. 3) of the mounting device 300 and the through holes 153a to 153d of the mounting device 1300 at the same position on the optical axis projection, the fastening portion of the fixing member 120 is shared. It can be used. That is, the mounting device 300 and the mounting device 1300 can be exchanged and used according to the user's request.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. Furthermore, each embodiment mentioned above shows only one embodiment of this invention, and it is also possible to combine each embodiment suitably. For example, in the above embodiment, the mount device provided in the imaging device main body has been described. However, the mount device according to the present invention may be provided in a mount adapter. In the above embodiment, the movable mount member 320 is provided with the female screw portion 323 and the fixed mount member 310 is provided with the male screw portion 313. Conversely, the movable mount member 320 is provided with the male screw portion and the fixed mount member 310 is provided with the female screw portion. It is good also as a structure which provided the part. In this case, the rotational direction of the movable mount member 320 when the interchangeable lens 200 is attached is the clockwise direction when viewed from the front side.

DESCRIPTION OF SYMBOLS 120 Fixed member 121a-121d Screw boss part 200 Interchangeable lens 300 Mount apparatus 310 Fixed mount member 311 Mount surface 313 Male screw part 317a-317d Through-hole 320 Movable mount member 321a-321c Mount claw part 323 Female screw part 330 Anti-rotation convex member

Claims (11)

A mounting device to which an accessory is attached and detached,
A substantially annular fixed mount portion fastened to the fixed portion;
A substantially annular movable mount portion screwed with the fixed mount portion,
The fixed mount portion is
A mounting surface that contacts the accessory;
A first threaded portion,
The movable mount part is
An engaged portion that engages with an engaging portion of the accessory;
A second threaded part that is threadedly engaged with the first threaded part,
In the fixed mount portion, a mounting portion for the fixed portion is formed on the mount surface, and the first screwing portion is provided on the outer peripheral side of the fastening portion.   The fastening portion is a through hole formed at a position corresponding to a fastening hole provided in the fixing portion, and the fastening mount portion is fixed to the fastening hole by passing a fastening member through the through hole. The mounting apparatus according to claim 1, wherein the mounting apparatus is fixed to a fixing portion. A convex member having a convex part;
The mounting device according to claim 1, further comprising: an urging unit that urges the convex member so that the convex portion protrudes from the mount surface of the fixed mount portion.   The mounting device according to claim 3, wherein the convex portion is engaged with a concave portion provided in the accessory to restrict rotation of the accessory with respect to the fixed mount portion. An operation unit coupled to the movable mount unit;
5. The mounting device according to claim 1, further comprising: a detection unit configured to detect rotation of the movable mount unit with respect to the fixed mount unit by operating the operation unit. An arc-shaped thin plate material fixed to the surface of the fixed mount portion opposite to the mount surface,
The mounting apparatus according to claim 1, wherein the thin plate material abuts on the fixing portion. The movable mount part is
The outer ring,
An inner ring disposed inside the outer ring; and
A coupling portion that couples the outer ring portion and the inner ring portion;
The engagement portion is provided on an inner peripheral side of the inner ring portion, and the second screwing portion is provided on an inner peripheral side of the outer ring portion. 7. The mounting device according to any one of 6 above. The fastening portion is formed on a protrusion provided on the fixing portion,
In a state where the fixed mount portion is fastened to the fixed portion, the projection portion enters between the inner periphery of the outer ring portion and the outer periphery of the inner ring portion,
The amount of rotation of the movable mount part with respect to the fixed mount part is defined by the projecting part coming into contact with a flat part provided in the coupling part of the movable mount part. Mount device.   When the movable mount portion is rotated about its central axis, the depth at which the first screwing portion and the second screwing portion are screwed changes according to the rotation direction, whereby the movable mount portion is changed. The mounting apparatus according to claim 1, wherein the mounting device moves in an axial direction of the central axis with respect to the fixed mounting portion. The movable mount portion has a mount claw portion,
The movable mount portion is not in contact with the mount claw portion of the movable mount portion, and the mount surface of the fixed mount portion is in contact with the mount surface of the accessory. By rotating the movable mount portion so as to move the axial direction toward the fixed portion, the mount claw portion of the movable mount portion engages with the mount claw portion of the accessory so that the mount claw portion of the accessory is moved. The mounting device according to claim 9, wherein the mounting device is pulled toward the fixing portion. An imaging device body;
The mounting device according to any one of claims 1 to 10,
An imaging apparatus comprising: a fixing member for attaching the mount apparatus to the imaging apparatus main body.

Images