Mount module and imaging device

Abstract

To provide a mount module that has improved waterproofness without increasing its size.SOLUTION: A first mount module 300 is to removably attach a lens barrel 200 having bayonet pawl parts 212a-212c, and has: a mount base 310; a stationary mount part 320 that has a main body-side mount surface 321 in contact with a lens-side mount surface 211, and is fastened to the mount base 310; an operation ring 340 that is rotatably arranged between the stationary mount part 320 and the mount base 310; and a movable mount part 330 that is engaged with the operation ring 340, and moves in an optical axis direction while rotating in conjunction with rotation of the operation ring 340. The mount module has a first O-ring 361 arranged between the operation ring 340 and the stationary mount part 320, and a second O-ring 362 arranged between the operation ring 340 and the mount base 310.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a waterproof mount module and an imaging device. [Background technology]

[0002] Imaging devices with interchangeable lens barrels are widely used, and a so-called bayonet coupling type mount unit is known as one of the mechanisms included in a mount module that allows the lens barrel to be replaced. In the bayonet coupling type mount unit, the mount surface of the mount unit of the lens barrel is brought into contact with the mount surface of the mount unit, the distance to the imaging element provided in the imaging device being adjusted, and the lens barrel is rotated in a predetermined direction around the optical axis. Then, the claws provided on the mount module and the lens barrel are engaged with each other, and the lens barrel is biased toward the imaging element by a biasing member such as a leaf spring. As a result, the lens barrel is held by the imaging device.

[0003] However, the conventional bayonet coupling mount has a problem in that the lens barrel is held by the biasing force of the biasing member, so the lens barrel rattles by the amount of bending of the biasing member. When a large lens barrel is attached, rattle is likely to occur in the mount module, and the rattle creates gaps, reducing the waterproof performance.

[0004] To address this problem, for example, Patent Document 1 proposes a configuration in which a retaining member with a groove on the outer periphery of a fixed mount part for fixing the lens barrel is placed, an O-ring is placed in the groove, and a cover that covers the O-ring ensures waterproofing. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-35974 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technique described in Patent Document 1 requires a retaining member for arranging the O-ring on the outer periphery of the mount module, which results in an increase in the size of the entire mount module.

[0007] An object of the present invention is to provide a mount module that can improve waterproofing without increasing the size. [Means for solving the problem]

[0008] The mount module according to the present invention comprises: nail A mount module to which a lens barrel having a base portion can be detachably attached, the mount module comprising: a base portion; The first Contact with the mounting surface Second With mounting surface do a fixed mount section; and a movable section disposed between the fixed mount section and the base section so as to be rotatable about an optical axis; The claw portion of the lens barrel and is linked to the rotation of the movable part. Light Movable to move in the axial direction Claw Part and a first one disposed between the movable part and the fixed mount part. Sealing a second member disposed between the movable portion and the base portion; Sealing A mount module comprising: Effect of the Invention

[0009] According to the present invention, it is possible to realize a mount module that can improve waterproofing without increasing the size. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of an imaging device and an imaging system according to a first embodiment. [Diagram 2] FIG. [Diagram 3]2 is a perspective view of a mount portion of a lens barrel that is detachable from a first mount module that constitutes the imaging device. FIG. [Figure 4] FIG. 2 is a perspective view of a first mounting module. [Diagram 5] 2 is an exploded perspective view illustrating a main portion of a first mount module. FIG. [Figure 6] 11 is a perspective view illustrating a configuration for fixing a fixed mount portion to a mount base in the first mount module. FIG. [Figure 7] 1A is a perspective view showing a positional relationship for engaging a movable mount portion and an operation ring in a first mount module, and FIG. [Figure 8] 4 is a front view showing the positional relationship between the lens barrel and each of the claws of the movable mount. FIG. [Figure 9] 9A to 9D are cross-sectional views taken along lines BB, CC, and DD shown in FIG. 8. [Figure 10] 9 is an enlarged view of parts E, F and G shown in FIG. 8. [Figure 11] FIG. 2 is an exploded perspective view of a first mount module. [Figure 12] 2A and 2B are a front view and a cross-sectional view taken along the line AA of a first mount module; [Figure 13] 2 is an exploded perspective view of a first mount module and a main body module. FIG. [Figure 14] FIG. 11 is a perspective view of an imaging device and an imaging system according to a second embodiment. [Figure 15] FIG. 2 is a front perspective view of a second mounting module. [Figure 16] 11 is an exploded perspective view illustrating a main portion of a second mount module. FIG. [Figure 17] FIG. 2 is a front view of a second mounting module. [Figure 18] 18 is a cross-sectional view taken along lines II and JJ in FIG. 17. [Figure 19] FIG. 2 is an exploded perspective view of a second mounting module. [Figure 20]11 is a front view and a cross-sectional view taken along the line HH of a second mount module. FIG. [Figure 21] FIG. 13 is a front view of a third mounting module. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a front perspective view refers to a view showing an object from an oblique front side, and a rear perspective view refers to a view showing an object from an oblique rear side. The same expressions are used for exploded perspective views.

[0012] 1(a) and (b) are perspective views of the front and rear sides of an imaging device 1000 according to the first embodiment. Fig. 1(c) is a perspective view of the front side of an imaging system in which a lens barrel 200 (a so-called interchangeable lens) is attached to the imaging device 1000.

[0013] For convenience of explanation, an orthogonal coordinate system shown in FIG. 1 is set. The Z direction is a direction parallel to the imaging optical axis (hereinafter referred to as the "optical axis") of the imaging device 1000. The optical axis in the mount module according to this embodiment is approximately coincident with the central axis of the mount, and specifically, is approximately coincident with the central axis of the diameter (either the inner diameter or the outer diameter, or the average diameter thereof) of the main body side mount surface 321 described later. The X direction is a direction perpendicular to the Z direction and parallel to the horizontal plane when the Z direction is parallel to the horizontal plane. The Y direction is a direction perpendicular to the X direction and the Z direction. Regarding the Z direction, the direction toward the subject to be photographed is the positive direction (+Z direction), and the opposite direction is the negative direction (-Z direction). Regarding the X direction, the direction toward the right when the imaging device 1000 is viewed from the +Z side is the positive direction (+X direction), and the opposite direction (direction toward the left) is the negative direction (-X direction). Regarding the Y direction, the direction in which a positive screw advances when a vector in the +Z direction is rotated around the Y axis to match a vector in the +X direction is defined as the positive direction (+Y direction), and the opposite direction is defined as the negative direction (-Y direction). Note that the front, back, left, right, top, and bottom directions of the imaging device 1000 are defined as the +Z side being the front, the -Z side being the back, the +X side being the right, the -X side being the left, the +Y side being the top, and the -Y side being the bottom.

[0014] The imaging device 1000 is generally composed of a first mount module 300 and a main body module 400 (imaging device main body). The first mount module 300 is modularized so that the lens barrel 200 can be attached and detached to the main body module 400. The main body module 400 incorporates a main board having a control circuit for performing overall control of the imaging device 1000, an imaging element for converting incident light guided from the lens barrel 200 into an electrical signal, and the like. In addition, various terminals (interfaces) for power supply, video output, and the like are provided on the rear surface of the main body module 400. Note that various components arranged inside and on the rear surface of the main body module 400 are not directly related to the present invention, and therefore further detailed description will be omitted.

[0015] 2(a) and (b) are exploded perspective views of the front and rear sides, respectively, of the imaging device 1000, showing a state in which the first mount module 300 and the main body module 400 are separated.

[0016] The main body module 400 includes a front cover 410 that constitutes a part of the appearance of the imaging device 1000. The front cover 410 is provided with a positioning hole 411 for positioning the first mount module 300 relative to the main body module 400. Meanwhile, the first mount module 300 has a mount base 310 (base portion) that constitutes a part of the appearance of the imaging device 1000. The mount base 310 is provided with a positioning boss 311 that is inserted into the positioning hole 411. The positioning boss 311 of the mount base 310 fits into the positioning hole 411 of the front cover 410, thereby determining the connection position of the first mount module 300 relative to the main body module 400. With the first mount module 300 positioned relative to the main body module 400, the first mount module 300 is connected and fixed to the main body module 400 by a fixing screw 390.

[0017] 3 is a rear perspective view of the mount section 210 of the lens barrel 200. The basic structure of the first mount module 300 conforms to a conventional bayonet coupling type mount structure. Therefore, the mount section 210 of the lens barrel 200, which is detachable from the first mount module 300, has a structure that allows it to be detachably attached to a conventional bayonet coupling type mount. Specifically, the mount section 210 has a lens side mount surface 211 (see FIG. 5(b)) and bayonet claws 212a to 212c. The bayonet claws 212a to 212c have bayonet claw contact surfaces 213a to 213c, respectively.

[0018] 4(a) and (b) are perspective views of the front side and the rear side of the first mount module 300, respectively. FIG. 5(a) and (b) are exploded perspective views of the front side and the rear side of the first mount module 300. In FIG. 5, the main parts of the first mount module 300 are shown in an exploded manner, and the mount section 210 of the lens barrel 200 is also shown. The first mount module 300 includes, as its main parts, a mount base 310, a fixed mount section 320, a movable mount section 330, and an operation ring 340 (movable section). FIG. 6(a) and (b) are perspective views for explaining a configuration for fixing (fastening) the fixed mount section 320 to the mount base 310, and the mount base 310 and the fixed mount section 320 are viewed from different directions in FIG. 6(a) and (b).

[0019] The mount base 310 has a through hole 312 and a positioning rib 313. The fixed mount part 320 has a main body side mount surface 321, an opening 322, a first screw part 323, a female screw part 324, a first contact surface 325, a second contact surface 326, and a positioning groove part 327.

[0020] The body side mount surface 321 comes into contact with the lens side mount surface 211 of the lens barrel 200 when the lens barrel 200 is attached to the first mount module 300. When attaching or detaching the lens barrel 200 to the first mount module 300, the bayonet claws 212a to 212c of the lens barrel 200 are inserted into / detached from the opening 322. The first screw portion 323 is a female screw formed about the optical axis.

[0021] The positioning rib 313 of the mount base 310 engages with the positioning groove 327 of the fixed mount part 320, thereby positioning the fixed mount part 320 with respect to the mount base 310. Here, the shape of the positioning rib 313 is such that it does not interfere with the sliding of the movable mount part 330 and the operation ring 340, and the details of this will be described later.

[0022] The movable mount section 330 incorporating the operation ring 340 is disposed between the mount base 310 and the fixed mount section 320 (details will be described later), and the fixed mount section 320 is positioned on the mount base 310 as described above. Then, fixing screws 350 are inserted from the rear side (-Z side) into the four through holes 312 provided in the mount base 310, and fastened to the female thread section 324 of the fixed mount section 320. As a result, the fixed mount section 320 is fixed to the mount base 310 with the movable mount section 330 and the operation ring 340 rotatably held between the mount base 310 and the fixed mount section 320.

[0023] 7(a) and (b) are perspective views showing the positional relationship for engaging the movable mount unit 330 and the operation ring 340, and the directions from which the movable mount unit 330 and the operation ring 340 are viewed are different in Fig. 7(a) and (b). Fig. 7(c) is a rear perspective view showing the state in which the movable mount unit 330 and the operation ring 340 are engaged.

[0024] The movable mount section 330 has claws 331a-331c, a second screw section 332, and grooves 333a, 333b. The claws 331a-331c have claw contact surfaces 334a-334c that come into contact with the bayonet claw contact surfaces 213a-213c of the bayonet claws 212a-212c of the mount section 210 of the lens barrel 200 (see FIG. 5(b)). The second screw section 332 is a male screw that screws into the first screw section 323 of the fixed mount section 320.

[0025] The operation ring 340 has knob portions 341a and 341b, convex portions 342a and 342b, and operation ring abutment surfaces 343a and 343b. The position of the operation ring 340 is determined by engaging convex portions 342a and 342b of the operation ring 340 with groove portions 333a and 333b of the movable mount portion 330, respectively, in the region sandwiched between the mount base 310 and the fixed mount portion 320. As a result, by rotating the operation ring 340, the movable mount portion 330 also rotates in conjunction with it. Note that the movable mount portion 330 and the operation ring 340 are not fastened (connected) with screws or the like.

[0026] Fig. 8(a)-(c) are front views showing the positional relationship between the bayonet claws 212a-212c of the lens barrel 200 and the claws 331a-331c of the movable mount 330. Fig. 9(a) is a cross-sectional view taken along the line BB in Fig. 8(a), Fig. 9(b) is a cross-sectional view taken along the line CC in Fig. 8(b), and Fig. 9(c) is a cross-sectional view taken along the line DD in Fig. 8(c). Fig. 10(a) is an enlarged view of part E in Fig. 8(a), Fig. 10(b) is an enlarged view of part F in Fig. 8(b), and Fig. 10(c) is an enlarged view of part G in Fig. 8(c).

[0027] In the state of FIG. 8(a), the bayonet claws 212a to 212c and the claws 331a to 331c do not overlap on the optical axis projection plane, and the lens barrel 200 is in a position where it can be attached to and detached from the imaging device 1000. That is, the state of FIG. 8(a) is a state where the lens barrel 200 and the mount unit 210 are dropped into the first mount module 300 of the imaging device 1000. In this state, the bayonet claws 212a to 212c of the lens barrel 200 are inserted into the opening 322 of the fixed mount unit 320, and the lens side mount surface 211 of the mount unit 210 abuts against the body side mount surface 321 of the fixed mount unit 320. Note that "on the optical axis projection plane" means "on the projection plane when viewed from the optical axis direction (on the XY plane when viewed from the +Z side to the -Z side)."

[0028] 8(b) shows a state in which the movable mount section 330 is rotated counterclockwise around the optical axis as viewed from the front of the imaging device 1000 to a position where the claws 331a to 331c begin to overlap the bayonet claws 212a to 212c on the optical axis projection plane. In the first mount module 300, the opening 344 (see FIG. 7) of the operation ring 340 is slidably engaged with the cylindrical section 328 (see FIG. 9) of the fixed mount section 320 in a clearance fit dimensional relationship, so that the operation ring 340 is rotatably disposed relative to the fixed mount section 320.

[0029] As described above, the convex portions 342a, 342b of the operation ring 340 are engaged with the groove portions 333a, 333b of the movable mount portion 330, respectively. Therefore, by rotating the operation ring 340, the movable mount portion 330 also rotates in the same direction. Note that sliding grease may be applied to the sliding engagement portion between the opening 344 of the operation ring 340 and the cylindrical portion 328 of the fixed mount portion 320 to improve sliding properties.

[0030] In the process of transition from the state of Fig. 8(a) to that of Fig. 8(b), the claws 331a to 331c of the movable mount 330 move along the optical axis direction toward the mount base 310. In other words, the movable mount 330 rotates in the same direction as the rotation direction of the operation ring 340 and engages with the operation ring 340 so as to be movable in the optical axis direction. Note that in the state of Fig. 8(b), the claws 331a to 331c are not engaged with the bayonet claws 212a to 212c.

[0031] 8(c) shows a state in which the operation of rotating movable mount section 330 around the optical axis in a counterclockwise direction as viewed from the front of imaging device 1000 has been completed, and lens barrel 200 is firmly attached to imaging device 1000. In this state, on the optical axis projection plane, bayonet claw sections 212a-212c of lens barrel 200 and claw sections 331a-331c of movable mount section 330 entirely overlap, and claw contact surfaces 334a-334c and bayonet claw contact surfaces 213a-213c abut against each other.

[0032] Note that knobs 341a and 341b provided on operation ring 340 are shaped so as not to protrude from imaging device 1000 on the optical axis projection plane when lens barrel 200 is attached. This makes it possible to prevent unintended external forces from acting on knobs 341a and 341b when lens barrel 200 is attached.

[0033] The lens barrel 200 is attached to the imaging device 1000 in the following manner. First, an index (not shown) on the lens barrel 200 is aligned with an index 301 (see FIG. 8(a) and the like) on the fixed mount section 320, and the lens side mount surface 211 of the lens barrel 200 is brought into contact with the body side mount surface 321 of the fixed mount section 320. This results in the state shown in FIG. 8(a). Next, the two knob sections 341a and 341b are gripped and the operation ring 340 is rotated counterclockwise as viewed from the +Z side, so that the bayonet claws 212a to 212c and the claws 331a to 331c overlap on the optical axis projection plane, as shown in FIG. 8(b).

[0034] Thereafter, the two knob portions 341a, 341b are gripped and the operation ring 340 is further rotated counterclockwise as viewed from the +Z side until the claw contact surfaces 334a-334c come into contact with the bayonet claw contact surfaces 213a-213c. This results in the state shown in FIG. 8(c) in which the lens barrel 200 is fixed to the first mount module 300. When removing the lens barrel 200 from the imaging device 1000, the above-mentioned mounting operation of the lens barrel 200 can be performed in reverse, and a description thereof will be omitted.

[0035] As described above, the operation ring 340 can rotate between the first position in FIG. 8(a) and the second position in FIG. 8(c). The first position is a position where the operation ring abutment surface 343a of the operation ring 340 abuts against the second abutment surface 326 of the fixed mount portion 320. The second position is a position where the operation ring abutment surface 343b of the operation ring 340 abuts against the first abutment surface 325 of the fixed mount portion 320. The rotation range of the movable mount portion 330 is the same as the rotation range of the operation ring 340. The positioning rib 313 of the mount base 310 is shaped so as not to hinder the movement of the convex portions 342a and 342b when the movable mount portion 330 and the operation ring 340 rotate.

[0036] Next, the waterproof structure of the first mount module 300 will be described. Figures 11(a) and (b) are exploded perspective views of the front and rear sides of the first mount module 300, respectively. As described above, the first mount module 300 includes the mount base 310, the fixed mount section 320, the movable mount section 330, the operation ring 340, and the fixing screw 350. The first mount module 300 also includes a first O-ring 361, a second O-ring 362, a sheet metal member 363, a fixing screw 364, an electrical communication contact section 370, a rotation detection unit 380, a cover member 384, and a fixing screw 385.

[0037] Fig. 12(a) is a front view of the first mount module 300, and Fig. 12(b) is a cross-sectional view taken along the line AA in Fig. 12(a). The fixed mount part 320 has a step part 329, and a first O-ring 361 having a substantially annular shape as a first elastic member is disposed in the step part 329. That is, the first O-ring 361 is disposed in a circular space formed between the fixed mount part 320 and the operation ring 340.

[0038] Further, the mount base 310 has an annular stepped portion 314, and a second O-ring 362 having a substantially annular shape as a second elastic member is disposed on the stepped portion 314. A sheet metal member 363 is fastened to the mount base 310 by a fixing screw 364 so that movement of the second O-ring 362 in the optical axis direction is restricted. That is, the second O-ring 362 is disposed in a space formed by the sheet metal member 363, the mount base 310, and the operation ring 340. Note that, although the sheet metal member 363 and the mount base 310 are separate parts in this embodiment, the sheet metal member 363 may be integral with the mount base 310.

[0039] In this way, in the first mount module 300, the space formed between the fixed mount part 320 and the operation ring 340 is filled with the first O-ring 361, so no gap is generated between the fixed mount part 320 and the operation ring 340. Also, the space formed between the mount base 310 and the operation ring 340 is filled with the second O-ring 362, so no gap is generated between the mount base 310 and the operation ring 340. Therefore, the intrusion of water, dust, etc. into the interior from between the fixed mount part 320 and the operation ring 340 or between the mount base 310 and the operation ring 340 is prevented.

[0040] In this embodiment, a configuration has been described in which O-rings are disposed between the fixed mount unit 320 and the operation ring 340 and between the mount base 310 and the operation ring 340, but other configurations are also possible. For example, O-rings may be disposed between the fixed mount unit 320 and the movable mount unit 330 and between the mount base 310 and the movable mount unit 330.

[0041] When the lens barrel 200 is attached to the imaging device 1000, the electrical communication contact portion 370 comes into contact with an electrical communication contact portion (not shown) of the lens barrel 200 and is in a conductive state. The rotation detection unit 380 includes a rotation detection board 381, a supporting metal plate 382, ​​a fixing screw 383, and a communication cable 387. The rotation detection board 381 is fixed to the supporting metal plate 382, ​​which is fastened to the mount base 310 by the fixing screw 383. The rotation detection board 381 includes a rotation detection switch 386.

[0042] As described with reference to FIGS. 8 to 10, when the lens barrel 200 is fixed to the first mount module 300 by operating the operation ring 340, a rotation detection switch 386 is pressed by a notched annular convex portion 335 (see FIG. 7(b)) provided on the movable mount portion 330. This detects that the lens barrel 200 is attached to the image capture device 1000, and the electrical communication contact portion 370 is switched on / off. The communication cable 387 is connected to a control board (not shown) arranged inside the main body module 400, which enables communication and power supply between the image capture device 1000 and the lens barrel 200. The cover member 384 is fastened to the mount base 310 by a fixing screw 385, and regulates the routing of the cable portion of the communication cable 387.

[0043] Here, as described above, the first mount module 300 prevents water and dust from entering from the outside to the inside, thereby preventing communication failures, malfunctions, etc. caused by water or dust entering the electrical communication contact portion 370 from the first mount module 300.

[0044] 13(a) and (b) are exploded perspective views of the first mount module 300 and the main body module 400. The main body module 400 includes an imaging module 420 therein. The imaging module 420 includes a substrate 422, an imaging element 421 mounted on the substrate 422, and a holding member 423 that holds the substrate 422. Incident light that has passed through the lens barrel 200 forms an image on the surface of the imaging element 421. The imaging element 421 converts the formed optical image into a video signal (electrical signal). The imaging module 420 is fixed to the front cover 410 by a screw (not shown). At this time, a washer (not shown) of an arbitrary thickness is sandwiched between the front cover 410 and the imaging module 420 to adjust the distance (flange back amount) between the imaging element 421 and the main body side mount surface 321 of the fixed mount part 320.

[0045] As described above, the first mount module 300 prevents water and dust from entering from the outside to the inside, and therefore prevents water and dust from entering from the first mount module 300 to the main body module 400.

[0046] <Second embodiment> Fig. 14(a) is a front perspective view of an imaging device 2000 according to the second embodiment. Fig. 14(b) is a front perspective view of an imaging system in which a lens barrel 200 is attached to the imaging device 2000. This is a front perspective view showing the state in which the lens barrel 200 is attached to the imaging device 2000. The imaging device 2000 is broadly composed of a second mount module 500 and a main body module 400. The main body module 400 and the lens barrel 200 are similar to the configurations described in the first embodiment, and therefore description thereof will be omitted here.

[0047] FIG. 15 is a front perspective view of the second mount module 500. FIGS. 16(a) and 16(b) are exploded front and rear perspective views for explaining the main parts of the second mount module 500. FIG. 17 is a front view of the second mount module 500. FIGS. 18(a) and 18(b) are cross-sectional views taken along the lines II and JJ in FIG. 17, respectively. Note that, among the components of the second mount module 500, the same components as those of the first mount module 300 explained in the first embodiment are given the same names and reference numerals, and explanations thereof will be omitted here.

[0048] The basic structure of the second mount module 500 is based on a conventional bayonet coupling type mount structure. The second mount module 500 includes a mount base 510, a fixed mount portion 520, a claw unit portion 530, an operation ring 540, and a leaf spring portion 550 as its main portions.

[0049] When the lens side mount surface 211 of the lens barrel 200 and the body side mount surface 521 of the fixed mount unit 520 are brought into contact with each other, the positioning pin 523 provided on the fixed mount unit 520 moves towards the body module 400 (-Z direction). With an index (not shown) provided on the lens barrel 200 and an index 522 provided on the fixed mount unit 520 aligned, the lens barrel 200 is rotated clockwise when viewed from the +Z side to the -Z side. Then, the positioning pin 523 of the fixed mount unit 520 fits into a hole (not shown) provided in the lens barrel 200, and the lens barrel 200 is fixed to the second mount module 500.

[0050] On the other hand, when removal button 511 provided on mount base 510 is pressed, positioning pin 523 provided on fixed mount portion 520 moves in the -Z direction, and positioning pin 523 of fixed mount portion 520 retreats from a hole (not shown) provided in lens barrel 200. This places lens barrel 200 in a rotatable state. Therefore, in this state, lens barrel 200 can be removed from second mount module 500 by rotating lens barrel 200 counterclockwise when viewed from the +Z side to the -Z side.

[0051] With the lens barrel 200 fixed to the second mount module 500, the bayonet claw contact surfaces 213a-213c of the bayonet claw portions 212a-212c of the lens barrel 200 are in contact with the claw portions 531a-531c of the claw unit portion 530. Furthermore, with the lens barrel 200 fixed to the second mount module 500, the leaf spring portion 550 biases the bayonet claw portions 212a-212c of the lens barrel 200 in the -Z direction (see FIG. 18(b)).

[0052] The claw unit portion 530 can be regarded as a portion corresponding to the movable mount portion 330 constituting the first mount module 300 in the first embodiment. The movable mount portion 330 is arranged to be rotatable, but the claw unit portion 530 is arranged to be movable a certain distance in the optical axis direction in a non-rotatable state.

[0053] The fixed mount section 520 is fixed to the mount base 510 by a screw (not shown). A third screw section 541 is provided as a male screw section on the inner circumference of the operation ring 540 and is centered on the optical axis. A fourth screw section 512 is provided as a female screw section on the mount base 510 and is centered on the optical axis. The third screw section 541 of the operation ring 540 screws into the fourth screw section 512 of the mount base 510. Therefore, when the operation ring 540 is rotated, the position where the third screw section 541 screws into the fourth screw section 512 changes, and the operation ring 540 can move in the optical axis direction.

[0054] 18(a) and 18(b), when operation ring 540 is rotated and moved in the -Z direction relative to mount base 510, first abutment surface 542 provided on operation ring 540 abuts against second abutment surface 532 provided on claw unit portion 530. When operation ring 540 is moved in the -Z direction from this state, claw unit portion 530 is pushed in the -Z direction by operation ring 540, and accordingly mount portion 210 of lens barrel 200 is also pushed in the -Z direction.

[0055] In this way, in second mount module 500, lens barrel 200 is first fixed by a lens fixing method of a conventional bayonet coupling type mount. After that, by gripping knobs 543a, 534b provided on operation ring 540 and rotating operation ring 540 as described above, it is possible to fix lens barrel 200 more firmly.

[0056] Next, the waterproof structure of the second mount module 500 will be described. Figures 19(a) and (b) show exploded perspective views of the front and rear sides of the second mount module 500. Figure 20(a) is a front view of the second mount module 500. Figure 20(b) is a cross-sectional view taken along the arrow HH shown in Figure 20(a).

[0057] As described above, the second mount module 500 includes the mount base 510, the fixed mount portion 520, the claw unit portion 530, the operation ring 540, and the leaf spring portion 550. The second mount module 500 also includes a first O-ring 560, a second O-ring 570, an electrical communication contact portion 370, a rotation detection unit 380, a cover member 384, and a fixing screw 385.

[0058] Fixed mount part 520 has a step part 524, and a first O-ring 560, which is an elastic member, is disposed in step part 524. That is, first O-ring 560 is disposed in a space formed between fixed mount part 520 and operation ring 540. Mount base 510 has a step part 513, and a second O-ring 570, which is an elastic member, is disposed in step part 513. That is, second O-ring 570 is disposed in a space formed between mount base 510 and operation ring 540.

[0059] 20(b), in the second mount module 500, the space formed between the fixed mount part 520 and the operation ring 540 is filled with the first O-ring 560, so no gap is generated between the fixed mount part 520 and the operation ring 540. In addition, the space formed between the mount base 510 and the operation ring 540 is filled with the second O-ring 570, so no gap is generated between the mount base 510 and the operation ring 540. This prevents water, dust, and the like from entering the interior from between the fixed mount part 520 and the operation ring 540 or between the mount base 510 and the operation ring 540.

[0060] Although the present invention has been described in detail above based on the preferred embodiments, the present invention is not limited to these specific embodiments, and various forms within the scope of the gist of the present invention are also included in the present invention. Furthermore, each of the above-mentioned embodiments merely shows one embodiment of the present invention, and each embodiment can be appropriately combined. In the above embodiment, an O-ring is shown as a sealing member for waterproofing, but this is not limited thereto, and for example, a sheet-shaped rubber material processed into a ring shape can also be used.

[0061] Furthermore, in the above-described embodiment, a mount module employing any mount shape has been described, but for example, the shape of the claw portion in the fixed mount section of the mount module may be a mount shape such as that of mount module 600 shown in Fig. 21. That is, in the mount module according to the embodiment of the present invention, various examples of the shape (type) of the mount in the mount module, such as the shape of the claw portion, may be employed.

[0062] In addition, in the above-described embodiment, the operation ring (340, 540) is exemplified as the operation means for operating the rotation of the movable mount unit around the optical axis, but the operation means is not limited to a ring-shaped member. For example, any configuration may be adopted as long as the operation means is capable of moving the movable mount unit, and the shape can be selected according to the waterproof performance guaranteed by the mount module. [Explanation of symbols]

[0063] 300 1st Mounting Module 310 Mount Base 320 Fixed mount part 323 First screw part 330 Movable mount 332 Second screw part 331a~331c Claw part 340 Operation Ring 361,560 First O-ring 362,570 Second O-ring 400 Main Module 500 Second Mounting Module 510 Mount Base 512 Fourth screw part 520 Fixed mount part 530 Claw unit part 531a~531c Claw part 540 Operation Ring 541 Third screw part 1000,2000 Imaging device

Claims

1. A mount module to which a lens barrel having a claw portion can be detachably attached, A base portion; a fixed mount portion having a second mount surface that comes into contact with a first mount surface of the lens barrel; a movable portion disposed between the fixed mount portion and the base portion so as to be rotatable about an optical axis; a movable claw portion that engages with a claw portion of the lens barrel and moves in the optical axis direction in conjunction with the rotation of the movable portion; a first sealing member disposed between the movable portion and the fixed mount portion; a second sealing member disposed between the movable portion and the base portion.

2. a movable mount portion that can be screwed to the fixed mount portion and that can move in the optical axis direction while rotating about the optical axis in conjunction with the rotation of the movable portion, The mount module according to claim 1 , wherein the movable claw portion is provided on the movable mount portion, and moves in the optical axis direction as the movable mount portion moves in the optical axis direction.

3. the fixed mount portion is fastened to the base portion, the movable mount portion has a first threaded portion; the fixed mount portion has a second threaded portion that threadably engages with the first threaded portion; 3. The mount module according to claim 2, wherein the first threaded portion rotates relative to the second threaded portion as the movable mount portion rotates, thereby moving the movable mount portion in the optical axis direction.

4. A mount module as described in claim 2 or 3, characterized in that when the movable part is moved in the optical axis direction from the fixed mount part toward the base part, the movable mount part is pushed by the movable part and moves in the same direction as the movable part.

5. a fixing screw for fastening the base portion and the fixed mount portion; 5. The mount module according to claim 1, wherein the fixing screw fastens the fixed mount portion and the base portion from a direction opposite to a direction in which the lens barrel is attached.

6. 6. The mount module according to claim 1, wherein the first sealing member and the second sealing member are substantially annular.

7. 7. The mount module according to claim 1, wherein the first sealing member and the second sealing member are made of an elastic material.

8. A mount module according to any one of claims 1 to 7; an imaging device body to which the mount module is attached and which incorporates an imaging element that converts an optical image formed by incident light from the mount module into an electrical signal.

Images