Electronic instrument, and accessory device

Abstract

To provide an electronic instrument that can arrange a structure capable of easily attaching / detaching accessories in a space saving way.SOLUTION: An electronic instrument has a fastening member equipped with a first screwing part and a first engagement part, and is the electronic instrument to which an accessory device rotating around a center axis of the fastening member, and equipped with a rotation engagement member including a second engagement part engaging with the first engagement part is detachably attachable, in which the fastening member is positioned coaxially with the first screwing part, and is provided outside of the first screwing part and inside of the electronic instrument.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an electronic device having an attachment structure for attaching and detaching accessories.

Background Art

[0002] In electronic devices such as digital cameras, generally, various accessories can be attached to a tripod screw provided on the bottom surface of the camera for shooting. While the tripod screw has high versatility, fixing the camera with the tripod screw requires turning the screw on the accessory side or turning the camera itself, which takes time for attachment and detachment. Patent Document 1 discloses an accessory that simplifies attachment and detachment to a corresponding accessory body by attaching an attachment to the bottom surface of the camera.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the accessory of Patent Document 1, it is necessary to attach an attachment to the bottom surface of the camera, and the camera becomes larger by the size of the attachment, so the portability is impaired. In addition, when attaching an accessory that is not compatible with the attachment, it takes time to remove the attachment once, and further time is required for attachment and detachment.

[0005] An object of the present invention is to provide an electronic device in which an accessory can be easily attached and detached and can be arranged in a space-saving manner.

Means for Solving the Problems

[0006] An electronic device according to one aspect of the present invention has a fastening member including a first screwing portion and a first locking portion, and includes a rotary locking member that rotates about the central axis of the fastening member and includes a second locking portion that engages with the first locking portion. The electronic device is an electronic device to which an accessory device is detachable, and the fastening member is positioned coaxially with the first screwing portion and is provided outside the first screwing portion and inside the electronic device.

Advantages of the Invention

[0007] According to the present invention, it is possible to provide an electronic device in which an accessory can be easily attached and detached, and the structure can be arranged in a space-saving manner.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

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Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

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Figure 17

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Figure 19

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant descriptions are omitted. (First Embodiment) FIG. 1 is a diagram for explaining the appearance of a camera 100 which is an example of the electronic device of the present embodiment. FIG. 1(a) is a front perspective view of the camera 100, FIG. 1(b) is a bottom perspective view of the camera 100, and FIG. 1(c) is an enlarged view of a bayonet fastening portion (fastening member) 24. In the present embodiment, a camera 100 that holds a lens unit 3 so as to enable tilting rotation and panning rotation will be described as an example of the electronic device, but the present invention is also applicable to other devices.

[0010] Camera 100 has a first housing 1 and a second housing 2. The first housing 1 is installed above the second housing 2 and is held so as to be horizontally rotatable (panning: rotation in the direction of the solid arrow) about the axis P with respect to the second housing 2. The top cover 10 is an exterior component of the camera 100, is formed of a transparent material, and includes a dome member 11 that covers the front portion and the upper portion. The dome member 11 is formed of a transparent resin material such as, for example, polycarbonate resin or acrylic resin. Inside the dome member 11, a lens unit 3 indicated by a dashed line is held so as to be vertically rotatable (tilting: rotation in the direction of the dashed arrow) perpendicular to the horizontal rotation direction about the axis T. With the above configuration, the camera 100 can relatively move the lens unit 3 with respect to the second housing 2 by appropriately combining panning and tilting, and even when the camera 100 is fixedly arranged, shooting in various directions becomes possible.

[0011] The second housing 2 is an exterior component of the camera 100 and includes a bottom cover (exterior member) 21 that forms a part of the exterior surface of the camera 100. Inside the bottom cover 21, a control board (not shown), a driving battery, and a wireless module are arranged. On the side surface of the bottom cover 21, a power button 22 and a wireless communication button 23 are provided. Further, on the bottom surface of the bottom cover 21, a female screw portion (first screwing portion) 21a that is screwed with the male screw portion of a general-purpose camera accessory is formed (integrally molded). Around the female screw portion 21a, a bayonet fastening portion 24 corresponding to a bayonet member (rotational locking member) 556 of a grip accessory (accessory device) 500 described later is provided. The bayonet fastening portion 24 includes the bottom cover 21 and a mount member 25 screwed to the bottom cover 21, and is positioned coaxially with the female screw portion 21a. The mount member 25 is manufactured by pressing a metal plate and is a component that serves as a structural housing when fastening to the grip accessory 500, and is a member having high rigidity and high strength. An opening centered on the female screw portion 21a is provided in the mount member 25. Further, a plurality of mount claw portions (first locking portions) 25a and a mount recess 25b are provided in the mount member 25. The mount claw portions 25a are formed to extend from the mount member 25 in the direction of the center of the female screw portion 21a. The mount recess 25b is a notch portion provided between the plurality of mount claw portions 25a. Therefore, the mount recess 25b is recessed more outward than the mount claw portions 25a in the radial direction centered on the female screw portion 21a. The region of the bayonet fastening portion 24 is outside the female screw portion 21a and inside the outer diameter of the mount recess 25b.

[0012] In addition, the mounting member 25 is formed with a pair of locking grooves (hole portions) 25c into which a push pin 557 (to be described later) of the grip accessory 500 fits. In a state where the camera 100 and the grip accessory 500 are mounted (hereinafter simply referred to as the mounted state), the push pin 557 fits into the locking groove 25c, thereby restricting the rotation of the camera 100 with respect to the grip accessory 500. The pair of locking grooves 25c are centered on the female screw portion 21a and are arranged to face each other on the X axis outside the mount recess 25b. Further, the pair of locking grooves 25c are formed on the same plane as the bayonet fastening portion 24 and outside the outer diameter of the bayonet fastening portion.

[0013] The bottom cover 21 includes four contact surfaces 21b that contact the grip accessory 500. The contact surfaces 21b are symmetrically arranged on both sides in the Z-axis direction with the pair of locking grooves 25c as the center. In the present embodiment, a configuration in which the mounting member 25 and the bottom cover 21 are separate components has been described, but the shape of the mounting member 25 may be integrally formed with the bottom cover 21.

[0014] FIG. 2 is a diagram for explaining the bayonet fastening portion 24. FIG. 2(a) is an exploded perspective view of the bayonet fastening portion 24. The magnet 26 applies an attractive force and an adsorbing force to the camera 100 and the grip accessory 500. The magnet 26 is assembled immediately below the contact surface 21b from the inside of the bottom cover 21 formed of a resin material and is fixed by an adhesive or the like. The mounting member 25 is fixed to the bottom cover 21 with four screws 27 disposed outside the bayonet fastening portion 24. The screw 27 is a flat head screw. The screw hole portion 25d of the mounting member 25 is provided with a chamfered shape corresponding to the neck-down tapered shape of the screw 27. Thereby, in the screw fastening state, the neck-down tapered shape and the chamfered shape are brought into contact with each other at an inclined surface, reducing displacement due to dropping or impact, and the screw head does not protrude from the surface 25e of the mounting member 25. The bottom cover 21 is fixed to the main base 2a formed of a resin material that serves as the base of the second housing 2 with four screws 21c. The cushion member 21d is a component having cushioning properties that serves as legs for supporting the camera 100 and is attached immediately above the four screws 21c.

[0015] Figure 2(b) is a bottom view of the camera 100, and Figure 2(c) is a cross-sectional view taken along line A-A of Figure 2(b). Here, the sizes of the bayonet fastening portion 24 in the radial directions (X-axis direction and Z-axis direction) will be described. The outer diameter D1 of the bayonet fastening portion 24 is the diameter D4 of the mount recess 25b. The female screw portion 21a is formed with a standardized Unified Fine thread size of 1 / 4, and the root diameter D3 of the screw is determined. The inner diameter D2 of the bayonet fastening portion 24 is larger than the root diameter D3 of the screw in order to ensure the wall thickness for the female screw portion 21a to satisfy the required strength. The diameter D5 of the mount claw portion 25a is approximately the average diameter of the outer diameter D1 and the inner diameter D2 of the bayonet fastening portion 24. The maximum outer diameter D6 of the mount member 25 is larger than the diameter D4 of the mount recess 25b in order to ensure a wall thickness that can be press-worked and ensure strength. The screws 27 are arranged on the circumference of the maximum outer diameter D6 of the mount member 25, but not at equal intervals, and are arranged such that the interval L2 between the screws 27 is inside the maximum outer diameter D6 in the Z-axis direction. The contact surfaces 21b are arranged such that the interval L1 between the contact surfaces 21b is inside the maximum outer diameter D6. With the above configuration, the screws 27 and the contact surfaces 21b can be arranged in the Z-axis direction even in a thin camera.

[0016] Next, the size of the bayonet fastening portion 24 in the height direction (Y-axis direction) will be described. The height H1 of the bayonet fastening portion 24 is the distance from the surface 25e of the mounting member 25 to the bottom surface 21ea of the bayonet claw accommodating portion 21e formed around the female screw portion 21a. The screw 27 is used when fastening the mounting member 25, and a sufficient amount of screw engagement is required so that the screw fastening portion does not break or become loose easily when an external force is applied to the mounting member 25. That is, a constant height H2 is required for the height from the surface 25e of the mounting member 25 to the tip position of the screw. By making the height H1 of the bayonet fastening portion 24 lower than the height H2 determined by the amount of screw engagement of the screw 27, the bayonet fastening portion 24 can be arranged even in a small camera in the Y-axis direction. Further, by forming the tip 21aa of the female screw hole at a position H3 recessed from the surface 25e of the mounting member 25, the interval L3 into which the bayonet claw portion (second locking portion) 556b described later enters can be increased. The position H3 of the tip 21aa of the female screw hole portion is set with reference to the back surface 25f of the mounting member with which the bayonet claw portion 556b engages. By configuring in this way, even if the thickness for satisfying the required strength of the bayonet claw portion 556b is ensured, the diameter D5 of the mounting claw portion 25a can be made smaller.

[0017] FIG. 3 is a diagram for explaining the appearance of the grip accessory 500 of the present embodiment. FIG. 3(a) is a front perspective view of the grip accessory 500, and FIG. 3(b) is a perspective view of the grip accessory 500 when used as a tripod.

[0018] The grip accessory 500 is attached to the bayonet fastening part 24 provided on the bottom surface of the camera 100. The user holds the grip body 501 and takes pictures. The grip accessory 500 includes a grip body 501 having a thickness that can be held by the user with one hand, and a pan-tilt head 550 to which the camera 100 is fixed. The grip body 501 and the pan-tilt head 550 are connected by a link part 510. By pushing in the unlock button 510a disposed at the center of the link part 510, the pan-tilt head 550 can rotate with respect to the grip body 501, and when the unlock button 510a is released, the rotation of the link part 510 is locked.

[0019] On the back side of the grip body 501, a first leg 501a and a second leg 501b formed in a symmetric shape are rotatably supported. The grip accessory 500 can be stably supported at three locations, namely the grip body 501, the first leg 501a, and the second leg 501b, by opening the first leg 501a and the second leg 501b, and can also be used as a tripod.

[0020] The operation unit 520 is used to operate the camera 100 and is detachably arranged from the grip body 501. The operation unit 520 includes operation buttons for executing functions frequently used in the camera 100. For example, the operation unit 520 includes a mode switching member 520a for switching between video shooting and still image shooting and a shooting button 520b for starting / ending the shooting operation. Further, the operation unit 520 includes an AF button 520c for driving the focus unit in the lens unit 3 to adjust the focus and a zoom button 520d for operating the lens unit 3 in the wide / tele direction. The operation unit 520 outputs various control signals to the camera 100 through wireless communication. When taking pictures while holding the grip accessory 500, the operation unit 520 is provided at a position where it can be operated by the user's thumb operation, thereby improving the operability. Also, since the operation unit 520 can be removed and used, the grip accessory 500 can be used as a tripod, enabling the user to take pictures even from a position away from the camera 100.

[0021] FIG. 4 is a diagram for explaining the pan-tilt unit 550. FIG. 4(a) is an exploded perspective view of the pan-tilt unit 550, and FIG. 4(b) is an enlarged view for explaining the structure corresponding to the bayonet fastening portion 24 on the camera 100 side.

[0022] The pan-tilt unit 550 includes a hinge cover 551, a centering pin 552, a rotation operation member 553, an intermediate cover 554, a lever (release member) 555, a bayonet member 556, a push pin 557, a magnet 558, a top cover 559, and a cushion member 560. The exterior of the pan-tilt unit 550 is mainly composed of the hinge cover 551, the intermediate cover 554, and the top cover 559 formed of a resin material. The hinge cover 551 is held rotatably about the X-axis with respect to the grip body 501. The rotation operation member 553 is held rotatably about the Y-axis with respect to the hinge cover 551, and further has a rotatable gap between the hinge cover 551 and the intermediate cover 554 and is clamped in the Y-axis direction. The centering pin 552 is provided at a position corresponding to the center of the female screw portion 21a of the camera 100. An inclined portion 552a is provided at the tip of the centering pin 552. A male screw (second screwing portion) 552b and a flange portion 552c that are screwed into the female screw portion 21a provided at the tip protruding from the pan-tilt unit 550 are provided below the inclined portion 552a in the Y-axis direction. The centering pin 552 is held rotatably integrally with the rotation operation member 553, and further held so as to be movable back and forth in the Y-axis direction, and is always biased upward in the Y-axis direction by a compression spring 5520. The position of the centering pin 552 in the Y-axis direction is regulated by the flange portion 552c coming into contact with the rotation operation member 553.

[0023] The bayonet member 556 is arranged on the top cover 559 around the centering pin 552. The bayonet member 556 is formed with a through hole 556a and is rotatably held about the Y-axis center with respect to the hollow rotating shaft 559a formed around the centering pin 552 of the top cover 559. Around the through hole 556a, a bayonet claw portion 556b that engages with the mounting claw portion 25a of the camera 100 is formed. Further, the bayonet member 556 is held so as to be able to advance and retreat in the Y-axis direction and is biased upward in the Y-axis direction by a bayonet spring 5560. The bayonet spring 5560 has both the function of a compression spring and the function of a torsion spring, and biases the bayonet member 556 in the rotational direction (hereinafter simply referred to as the engagement direction) in which it engages with the mounting claw portion 25a.

[0024] A pair of push pins 557 are arranged opposite to each other on the X-axis around the centering pin 552. The push pins 557 are formed by insert molding a resin material onto a metal shaft 557a to form a base portion 557b, which is an integral part. On the base portion 557b, a convex portion 557c that fits into a pair of rotation restricting grooves (recesses) 556c of the bayonet member 556 and restricts the rotation of the bayonet member 556 is formed. The push pins 557 are held so as to be able to advance and retreat in the Y-axis direction with respect to the top cover 559 and are biased upward in the Y-axis direction by a compression spring 5570. The shaft 557a of the push pin 557 protrudes from the top cover 559 and, when the camera 100 and the grip accessory 500 are mounted, fits into the lock groove 25c of the camera 100 to restrict the rotation of the camera 100.

[0025] The magnet 558 is arranged at a position corresponding to the magnet 26 of the camera 100 and gives an attractive force and an adsorptive force to the camera 100 and the grip accessory 500. The magnet 558 is assembled from the inside of the top cover 559 formed of a resin material directly below the contact surface 559b and is fixed by an adhesive or the like.

[0026] In the Y-axis direction, the centering pin 552 is provided at a position protruding from the bayonet claw portion 556b and the push pin 557. By setting such a height relationship, when the camera 100 and the grip accessory 500 are mounted, first, the centering pin 552 abuts against the female screw portion 21a of the camera 100, and the centering of the camera 100 and the grip accessory 500 is achieved. Then, due to the attractive force of the magnets (558, 26) arranged on both sides, the positions of the lock groove 25c of the camera 100 and the push pin 557 of the grip accessory 500 are attracted to a phase where they match (hereinafter simply referred to as the mounting phase). The bayonet claw portion 556b is at a position corresponding to the mount recess 25b and enters the bayonet claw housing portion 21e. In the mounting phase, only the push pin 557 is pushed in the Y-axis direction, and the convex portion 557c of the push pin 557 disengages from the pair of rotation restricting grooves 556c of the bayonet member 556. As a result, the bayonet member 556 rotates in the engaging direction by the bayonet spring 5560 and enters a coupled state where it engages with the mount claw portion 25a. When removing the camera 100 from the grip accessory 500, the lever 555 is operated. Then, the bayonet member 556 is rotated in the direction opposite to the engaging direction (hereinafter simply referred to as the non-engaging direction) (moved from the locked position where it engages with the mount claw portion 25a to the non-locked position where it does not engage with the mount claw portion 25a). As a result, the engagement between the bayonet claw portion 556b and the mount claw portion 25a is disengaged, and the camera 100 can be removed.

[0027] Note that in this embodiment, a configuration has been described in which when the push pin 557 is pressed, the bayonet member 556 automatically rotates and enters a coupled state where the bayonet claw portion 556b and the mount claw portion 25a are engaged. However, a configuration in which the lever 555 is manually operated to achieve the coupled state may also be used.

[0028] FIG. 5 is a diagram for explaining the operation of the internal components of the pan-tilt unit 550 when the camera 100 and the grip accessory 500 are attached. FIG. 5(a) shows the state before the camera 100 and the grip accessory 500 are attached, and FIG. 5(b) shows the state of the internal components of the pan-tilt unit 550 before the camera 100 and the grip accessory 500 are attached. Indicators 21f and 559b serving as mounting phase marks are engraved on the bottom cover 21 of the camera 100 and the top cover 559 of the grip accessory 500, respectively. The indicator 559b of the top cover 559 is also engraved on the opposite side, and the camera 100 can be mounted even when rotated 180 degrees around the Y-axis center from the state of FIG. 5(c). Before the camera 100 is mounted, the bayonet member 556 is biased clockwise by a bayonet spring 5560, but is rotationally restricted because the convex portion 557c of the push pin 557 and the rotation restricting groove 556c are engaged. The lever 555 is rotatably held with respect to a shaft portion (not shown) of the top cover 559 and is biased clockwise by a torsion spring 5550. The lever 555 abuts against and stops at an extension portion 556d extending in the radial direction of the bayonet member 556.

[0029] Figure 5(c) shows the state when the camera 100 and the grip accessory 500 are attached, and Figure 5(d) shows the state of the internal components of the pan / tilt head 550 after attachment. When the camera 100 and the grip accessory 500 are attached, the push pin 557 is pushed downward in the Y-axis direction, and the engagement between the convex portion 557c of the push pin and the rotation restricting groove 556c is disengaged. As a result, the bayonet member 556 is urged in the clockwise direction by the bayonet spring 5560, so it rotates until it contacts the stopper surface (not shown) of the top cover 559, and the bayonet claw portion 556b and the mount claw portion 25a are engaged in a coupled state. That is, when the user simply places the camera 100 on the grip accessory 500, the bayonet member 556 and the mount claw portion 25a are automatically mechanically coupled, so it can be attached without performing troublesome operations such as turning a screw as in a conventional tripod accessory or the like. In the coupled state, the lever 555 is pushed by the extending portion 556d of the bayonet member 556 and rotates counterclockwise. By rotating the lever 555 clockwise, the bayonet member 556 is rotated counterclockwise against the biasing force of the bayonet spring 5560, and the mechanical coupled state is released. Then, the camera 100 can be removed against the attracting force of the two magnets 558 and 26. The finger hook portion 555a of the lever 555 is configured such that the protruding amount L5 in the coupled state in Figure 5(d) is smaller than the protruding amount L4 in the uncoupled state in Figure 5(b). By the position of the lever 555 transitioning in this way, it is possible to prevent the user from accidentally touching the finger hook portion 555a of the lever and releasing the coupled state in the coupled state.

[0030] FIG. 6 is a diagram for explaining the operation of the bayonet member 556 when the camera 100 and the grip accessory 500 are mounted in the mounting phase. FIGS. 6(a) and 6(d) are diagrams showing the cross-sectional positions, FIG. 6(b) is a cross-sectional view taken along line A-A immediately before mounting, FIG. 6(c) is a cross-sectional view taken along line A-A immediately after mounting, and FIG. 6(e) is a cross-sectional view taken along line B-B. When mounting with the indicators 21f and 559b engraved on the camera 100 and the grip accessory 500 as a guide, they are drawn in by the attracting force of the magnets 26 and 558 arranged on both sides until the contact surfaces 21b and 559b come into contact. The shaft 557a of the push pin 557 fits into the lock groove 25c of the mount member 25 and moves downward in the Y-axis direction by a predetermined movement amount L6. At this time, the bayonet claw portion 556b is in phase with the recess 25b of the mount member 25 and enters the bayonet claw housing portion 21e. That is, in the mounting phase, in the Y-axis direction, only the push pin 557 moves by the movement amount L6 without the bayonet member 556 moving. The movement amount L6 is set to be larger than the amount of engagement between the rotation restriction groove 556c of the bayonet member and the convex portion 557c of the push pin. That is, the convex portion 557c of the push pin moves to the lower side of the bayonet member 556 in the Y-axis direction, releasing the rotation restriction of the bayonet member 556 and making the bayonet member 556 rotatable. As a result, the bayonet claw portion 556b rotates in the engaging direction by the bayonet spring 5560 and enters into a coupled state of engaging with the mount claw portion 25a.

[0031] FIG. 7 is a diagram for explaining the operation of the bayonet member 556 when the camera 100 and the grip accessory 500 are mounted in the non-mounted phase. FIGS. 7(a) and 7(c) are diagrams showing the cross-sectional positions, FIG. 7(b) is a cross-sectional view taken along line A-A, and FIG. 7(d) is a cross-sectional view taken along line B-B. In the non-mounted phase, the bayonet claw portion 556b abuts against the mount claw portion 25a and is pushed downward in the Y-axis direction. Also, the push pin 557 also abuts against the bottom cover 21 of the camera 100 and is pushed downward in the Y-axis direction. Thus, in the non-mounted phase, the bayonet member 556 and the push pin 557 are pushed downward in the Y-axis direction, and the rotation restricting groove 556c of the bayonet member and the convex portion 557c of the push pin remain engaged, and the bayonet member 556 does not rotate. In the present embodiment, the description has been made with reference to the diagram at the position rotated 90 degrees with respect to the mounted phase, but in other non-mounted phases, the bayonet member 556 and the push pin 557 are in the same state and do not enter the coupled state except in the mounted phase. However, if the camera 100 or the grip accessory 500 is rotated from the non-mounted phase to match the mounted phase, the bayonet claw portion 556b and the mount claw portion 25a engage in the coupled state as described with reference to FIG. 5.

[0032] FIG. 8 is a diagram for explaining a method of attaching a conventional camera 200 having only the female screw portion 200a without the bayonet fastening portion 24 and a grip accessory 500. FIG. 8(a) is a bottom perspective view of the camera 200, FIG. 8(b) is a cross-sectional view of the attached state, and FIG. 8(c) is a cross-sectional view of the state where the centering pin 552 and the female screw portion 200a are screwed together. Since the camera 200 does not have a shape corresponding to the bayonet claw portion 556b or the shaft 557a of the push pin 557, the bayonet member 556 and the push pin 557 are pushed downward in the Y-axis direction in the same non-attached phase as described in FIG. 7. That is, the rotation restricting groove 556c of the bayonet member 556 and the convex portion 557c of the push pin remain engaged, and the bayonet member 556 does not rotate. The centering pin 552 is pushed down by the contact between the inclined portion 552a of the centering pin 552 and the female screw portion 200a, and retracts into the pan / tilt head 550 while compressing the compression spring 5520. As described with reference to FIG. 4, a male screw 552b corresponding to the female screw portion 200a is formed on the centering pin 552. The rotation operation member 553 is rotated in the screw tightening direction from the state of FIG. 8(b). As a result, the centering pin 552 rotates integrally with the rotation operation member 553, and the male screw 552b is screwed into the female screw portion 200a while rotating against the urging force of the compression spring 5520. When the flange portion 552c of the centering pin 552 abuts against the rotation operation member 553, the rotation operation member 553 cannot be rotated in the screw tightening direction. Thereby, the camera 200 and the grip accessory 500 are fixed. Further, when the rotation operation member 553 is rotated in the direction opposite to the screw tightening direction from the fixed state, the centering pin 552 that rotates integrally with the rotation operation member 553 retracts into the grip accessory 500 while compressing the compression spring 5520. Then, when the male screw portion 552b is completely removed from the female screw portion 200a, the camera 200 can be removed from the grip accessory 500. By configuring the centering pin 552 in this way, the grip accessory 500 can be attached to and detached from the conventional camera 200 as well. (Second Embodiment) FIG. 9 is a diagram for explaining the bayonet fastening portion 240. FIG. 9(a) is an exploded perspective view of the bottom cover 210, FIG. 9(b) is a bottom view of the female screw member 220, and FIG. 9(c) is a cross-sectional view taken along line A-A.

[0033] The female screw member 220 is manufactured by cutting or casting metal, and a female screw portion (first screwing portion) 220a for fastening to the male screw portion of a general-purpose camera accessory is formed (integrally formed). Around the female screw portion 220a, a bayonet fastening portion (fastening member) 240 corresponding to the bayonet member 556 of the grip accessory 500 is formed.

[0034] The bayonet fastening portion 240 is composed of the bottom cover 210 and a female screw member (screwing member) 220 screwed to the bottom cover 210. The female screw member 220 has a plurality of mounting claw portions (first locking portions) 220b and screw fastening portions 220c formed around the female screw portion 220a. The screw fastening portion 220c is arranged to face each other on the X-axis with the female screw portion 220a as the center, and extends outward from the mounting claw portion 220b in the radial direction. The bottom cover 210 is formed with a pair of lock grooves 210c into which the push pin 557 of the grip accessory 500 fits. The bottom cover 210 is provided with four contact surfaces 210b that contact the grip accessory 500. The contact surfaces 210b are symmetrically arranged on both sides in the Z-axis direction with the pair of lock grooves 210c as the center. The female screw member 220 is fixed to the bottom cover 210 by two screws 270 arranged inside the bayonet fastening portion 240. The screw 270 is a flat head screw, and the screw hole portion 220d of the female screw member 220 is provided with a chamfered shape corresponding to the tapered shape of the head-down of the flat head screw. Thereby, in the screw fastening state, the tapered shape of the head-down and the chamfered shape are brought into contact with each other by the inclined surface, reducing the displacement due to dropping or impact, and the screw head does not protrude from the surface 220e of the female screw member 220.

[0035] Next, the sizes of the bayonet fastening portion 240 in the radial directions (X-axis direction and Z-axis direction) will be described. The female screw portion 220a of the female screw member 220 is formed with a nominal size of Unified Fine Thread 1 / 4, and the root diameter D30 of the screw is determined. The inner diameter D20 of the bayonet fastening portion 240 is larger than the root diameter D30 of the screw in order to ensure the wall thickness for the female screw portion 220a to satisfy the required strength. The outer diameter D50 of the mounting claw portion 220b is larger than the inner diameter D20 because it extends outward from the inner diameter D20 of the bayonet fastening portion 240. The screw hole portion 220d is disposed outside the inner diameter D20 and on a substantially circumference of the outer diameter D50 of the mounting claw portion 220b, and the outer diameter D40 of the screw fastening portion 220c is larger than the outer diameter D50. That is, the outer diameter D40 of the screw fastening portion 220c becomes the maximum outer diameter and becomes the outer diameter D10 of the bayonet fastening portion 240. (Third Embodiment) FIG. 10 is a diagram for explaining the appearance of the camera 100 of the present embodiment. FIG. 10(a) is a perspective view of the bottom cover 321, FIG. 10(b) is the bottom surface of the camera 100, FIG. 10(c) is an enlarged view of the bayonet fastening portion (fastening member) 324, and FIG. 10(d) is a cross-sectional view taken along line A-A showing the internal structure.

[0036] On the bottom surface of the bottom cover 321, a female screw portion 321a for fastening to the male screw portion of a general-purpose camera accessory is formed. Around the female screw portion 321a, a bayonet fastening portion 324 corresponding to a bayonet member (rotational locking member) 656 (see FIG. 11) of a grip accessory 500 described later is formed. The bayonet fastening portion 324 is composed of the bottom cover 321 and a mount member 325 screwed to the bottom cover 321. The mount member 325 is manufactured by pressing a metal plate and is a component that serves as a structural housing when fastening to the grip accessory 500, and is a member having high rigidity and high strength. The mount member 325 is provided with an opening centered on the female screw portion 321a, and a plurality of mount claw portions (first locking portions) 325a and a mount recess 325b are formed. Further, the mount member 325 is formed with a pair of lock grooves 325c into which a push pin 657 (see FIG. 11) of the grip accessory 500 fits. In a state where the camera 100 and the grip accessory 500 are mounted (hereinafter simply referred to as the mounted state), the rotation of the grip accessory 500 and the camera 100 is restricted by the push pin 657 fitting into the lock grooves 325c. The pair of lock grooves 325c are centered on the female screw portion 321a and are arranged to face each other on the X-axis outside the mount recess 325b. The bottom cover 321 forms two contact surfaces 321b that come into contact with the grip accessory 500. The contact surfaces 321b are arranged to face each other with the female screw portion 321a as the center. Inside the two contact surfaces 321b, magnets (for fixing) 26 for adsorbing when the camera 100 is mounted on the grip accessory 500 are arranged. Also, as shown in FIG. 10(c), two other magnets (magnetic bodies) 326 are arranged on the inner surface side of the camera 100 with respect to the lock grooves 325c of the bottom cover 321. The magnets 326 function to engage the bayonet member 556 and the mount member 325 when the camera 100 is attached to the pan-tilt 550 by a method described later.

[0037] FIG. 11 is a diagram for explaining the pan-tilt unit 650. FIG. 11(a) is an exploded perspective view of the pan-tilt unit 650, FIG. 11(b) is an enlarged view for explaining the structure corresponding to the bayonet fastening portion 324 on the camera 100 side, and FIG. 11(c) is an enlarged view for explaining the structure of the magnet holder 662 and the push pin 657 described later.

[0038] The pan-tilt unit 650 includes a hinge cover 651, a centering pin 652, a rotation operation member 653, an intermediate plate 654, a lever 655, a bayonet member 656, and a push pin 657. Further, the pan-tilt unit 650 includes a magnet holder 662, a fixing magnet 658, a top cover 659, and a cushion member 660.

[0039] The exterior of the pan-tilt 650 is mainly composed of a hinge cover 651 and a top cover 659 formed of a resin material. The hinge cover 651 is held rotatable about the X-axis center with respect to the grip body 601. The rotation operation member 653 is held rotatable about the Y-axis center with respect to the hinge cover 651, and further, in the Y-axis direction (thrust direction), it is sandwiched with a rotatable gap between the hinge cover 651 and the intermediate plate 654. The centering pin 652 is provided at a position corresponding to the center of the female screw portion 321a of the camera 100. An inclined portion 652a is formed at the tip of the centering pin 652, and a male screw 652b and a flange portion 652c corresponding to the female screw portion 321a are formed on the lower side of the inclined portion 652a in the Y-axis direction. The centering pin 652 is held rotatable integrally with the rotation operation member 653, and further held movable forward and backward in the Y-axis direction (thrust direction), and biased upward in the Y-axis direction by a compression spring 6520. The position of the centering pin 652 in the Y-axis direction is regulated by the flange portion 652c abutting against the rotation operation member 653. The bayonet member 656 is arranged on the top cover 659 with the centering pin 652 as the center. The bayonet member 656 has a through hole 656a formed therein and is held rotatable about the Y-axis center with respect to a hollow rotation shaft 659a formed corresponding to the center of the centering pin 652 of the top cover 659. Bayonet claws 656b that engage with the mount claw portions 325a of the camera 100 are formed around the through hole 656a. Further, the bayonet member 656 is held movable forward and backward in the Y-axis direction (thrust direction) and biased upward in the Y-axis direction by a bayonet spring 6560. The bayonet spring 6560 has both the function of a compression spring and the function of a torsion spring, and biases the bayonet member 656 in the rotation direction (hereinafter simply referred to as the engagement direction) of engaging with the mount claw portions 325a.

[0040] The push pin 657 is arranged around the centering pin 652, and a magnet holder 662 is arranged on the opposite side centered on the centering pin 652. The push pin 657 is formed by insert molding a resin material onto a metal shaft 657a to form a base portion 657b, which becomes an integral part. On the base portion 657b, a convex portion 657c is formed that fits into the rotation restricting groove 656c of the bayonet member 656 to restrict the rotation of the bayonet member 656. The push pin 657 is held so as to be able to advance and retract in the Y-axis direction with respect to the top cover 659, and is biased upward in the Y-axis direction by a compression spring 6570. The shaft 657a of the push pin 657 protrudes from the top cover 659, and when the camera 100 and the grip accessory 500 are attached, it fits into the lock groove 325c of the camera 100 to restrict the rotation of the camera 100. Similarly, the magnet holder 662 is held so as to be able to advance and retract in the Y-axis direction with respect to the top cover 659 by being slidably guided by two shafts 654a clamped to the intermediate plate 654, and is biased downward in the Y-axis direction by a compression spring 6620. As shown in FIG. 11(c), a magnet 663 is fixed to the magnet holder 662 by an adhesive or the like, and when the magnet 326 of the camera 100 approaches, it adsorbs and functions to move the magnet holder 662 toward the camera 100 side. On the magnet holder 662, a convex portion 662a is formed that fits into the rotation restricting groove 656c of the bayonet member 656 to restrict the rotation of the bayonet member 656.

[0041] The fixing magnet 658 is disposed at a position corresponding to the magnet 26 of the camera 100, and provides an attractive force and an adsorptive force when the camera 100 and the grip accessory 500 are attached. The fixing magnet 658 is assembled immediately below the contact surface 659b from the inside of the top cover 659 formed of a resin material, and is fixed by an adhesive or the like. In the Y-axis direction, the centering pin 652 is positioned to protrude from the bayonet claw 656b and the push pin 657. By setting such a height relationship, when attempting to attach the camera 100 to the grip accessory 500, first the centering pin 652 abuts against the female screw portion 321a of the camera 100, and the camera 100 and the grip accessory 500 are centered. Thereafter, if the positions of the lock groove 325c of the camera 100 and the push pin 657 of the grip accessory 500 are in the correct phase (hereinafter simply referred to as the attachment phase), the bayonet claw 656b is positioned corresponding to the mount recess 325b and enters the bayonet claw housing portion 21e. In the attachment phase, only the push pin 657 is pushed in the Y direction, and the convex portion 657c of the push pin 657 disengages from the rotation restricting groove 656c of the bayonet member 656. Further, the magnet 663 of the magnet holder 662 is attracted to the magnet 326 of the camera 100 and moves toward the camera 100 side in the Y-axis direction, and the convex portion 662a of the magnet holder 662 disengages from the rotation restricting groove 656c of the bayonet member 656. As a result, the bayonet member 656 rotates in the engaging direction by the bayonet spring 6560 and enters a coupled state in which it engages with the mount claw portion 325a. When removing the camera 100 from the grip accessory 500, the lever 655 is operated to rotate the bayonet member 656 in a direction opposite to the engaging direction, so that the bayonet claw 656b disengages from the mount claw portion 325a, and the camera 100 can be removed.

[0042] FIG. 12 is a diagram for explaining the operation of internal components of the pan-tilt unit 650 when the camera 100 and the grip accessory 500 are mounted. FIG. 12(a) shows the state before the camera 100 and the grip accessory 500 are mounted, and FIG. 12(b) shows the state of the internal components of the pan-tilt unit 650 before mounting. On the bottom cover 321 of the camera 100 and the top cover 659 of the grip accessory 500, indicators 321f and 659b serving as marks for mounting alignment are engraved. Before the camera 100 is mounted, the bayonet member 656 is biased clockwise by the bayonet spring 6560, but its rotation is restricted because the convex portion 657c of the push pin and the rotation restricting groove 656c are engaged. At the same time, the rotation of the bayonet member 656 is restricted because the rotation restricting groove 656c formed on the opposite side of the bayonet member 656 is engaged with the convex portion 662a of the magnet holder 662. The lever 655 is rotatably held with respect to the shaft portion (not shown) of the top cover 659 and is biased clockwise by the torsion spring 6550. The lever 655 abuts against and stops at the extending portion 656d extending in the radial direction of the bayonet member 656.

[0043] FIG. 12(c) shows a state in which the camera 100 and the grip accessory 500 are mounted, and FIG. 12(d) shows the internal components of the pan-tilt unit 550 after mounting. When the camera 100 and the grip accessory 500 are mounted, the push pin 657 is pushed in the Y-axis direction, and the engagement between the convex portion 657c of the push pin and the rotation restricting groove 656c is disengaged. At the same time, on the opposite side, the magnet holder 662 moves toward the camera 100 side, and the engagement between the convex portion 662a of the magnet holder 662 and the rotation restricting groove 656c is disengaged. As a result, the bayonet member 656 is biased in the clockwise direction by the bayonet spring 6560 and rotates until it abuts against a stopper surface (not shown) provided on the top cover 659, and the bayonet claw 656b and the mount claw portion 325a are engaged in a coupled state. That is, the user can simply place the camera 100 on the grip accessory 500, and the bayonet member 656 automatically forms a mechanical coupling state, so that the camera can be attached without performing troublesome operations such as turning a screw as in a conventional tripod accessory or the like. In the coupled state, the lever 655 is pushed by the extending portion 656d of the bayonet member 656 and rotates counterclockwise. By rotating the lever 655 clockwise, the bayonet member 656 is rotated counterclockwise against the biasing force of the bayonet spring 6560, and the uncoupled state shown in FIG. 12(b) is achieved, and the camera 100 can be easily removed. The hook portion 655a of the lever 655 is configured such that the protruding amount L5 in the coupled state shown in FIG. 12(d) is smaller than the protruding amount L4 in the uncoupled state shown in FIG. 12(b). By the position of the lever 655 changing in this way, the chance that the user accidentally touches the hook portion 655a of the lever when the camera 100 and the grip accessory 500 are in the coupled state can be reduced, and the coupled state can be prevented from being accidentally released. Also, in this configuration, even if the user accidentally presses the push pin 657 of the pan-tilt unit 650, the magnet holder 662 does not move toward the camera 100 side, so that the bayonet member 656 can be prevented from unintentionally moving to the coupled state.

[0044] FIG. 13 is a diagram for explaining the operation of the bayonet member 656 when the camera 100 and the grip accessory 500 are attached in the attachment phase. FIGS. 13(a) and 13(d) are diagrams showing the cross-sectional positions, FIG. 13(b) is a cross-sectional view taken along line A-A immediately before attachment, FIG. 13(c) is a cross-sectional view taken along line A-A immediately after attachment, and FIG. 13(e) is a cross-sectional view taken along line B-B.

[0045] When attempting to attach the camera 100 and the grip accessory 500 with the indicators 321f and 659b engraved thereon as a guide, they are drawn in by the attracting force of the magnets 26 and 658 disposed inside until the contact surfaces 321b and 659b come into contact. The shaft 657a of the push pin 657 is moved by a predetermined amount L6 in the Y-axis direction while fitting into the lock groove 325c of the mount member 325. At this time, the bayonet claw 656b aligns with the recess 325b of the mount member and enters the bayonet claw housing portion 21e. That is, in the attached state, in the Y-axis direction, only the push pin 657 moves by the amount L6 while the bayonet member 656 does not move. The movement amount L6 is set to be larger than the amount by which the rotation restricting groove 656c of the bayonet member 656 and the convex portion 657c of the push pin engage. That is, the convex portion 657c of the push pin 657 moves downward of the bayonet member 656 in the Y-axis direction, releasing the rotation restriction of the bayonet member 656 and making the bayonet member 656 rotatable. Also, the magnet holder 662 moves toward the camera 100 as the magnet 663 is attracted by the magnet 326 of the camera 100. At this time, the movement amount L7 of the magnet holder 662 is set to be larger than the amount by which the rotation restricting groove 656c of the bayonet member 656 and the convex portion 662a of the magnet holder 662 engage. That is, the convex portion 662a of the magnet holder moves upward of the bayonet member 656 in the Y-axis direction, releasing the rotation restriction of the bayonet member 656 and making the bayonet member 656 rotatable. As a result, the bayonet claw 656b rotates in the engaging direction by the bayonet spring 6560 and enters a coupled state where it engages with the mount claw portion 325a. In this state, an attracting force is generated between the magnet 663 of the magnet holder 662 and the magnet 326 of the camera 100, and the camera 100 can be fixed to the grip accessory 500 without play. (Fourth Embodiment) FIG. 14 is a diagram for explaining the appearance of the camera 100 of this embodiment. FIG. 14(a) is a front perspective view of the camera 100, FIG. 14(b) is a bottom perspective view of the camera 100, and FIG. 14(c) is an enlarged view of the lock claw fastening portion 824.

[0046] The camera 100 includes a first housing 1 (top cover 10 and dome member 11) and a second housing 2 (bottom cover 821). The mount member 825 where the lock claw fastening portion 824 is formed is fastened to the bottom surface of the bottom cover 821 at four locations with screws 827a, 827b, 827c, and 827d. The mount member 825 is made of metal and is a component that serves as a structural housing when fastening to the pan-tilt 750 described later, so it is a member having high rigidity and high strength. A female screw portion (first screwing portion) 825a for fastening to the male screw portion of a general-purpose camera accessory is formed on the mount member 825. Around the female screw portion 825a, a lock claw fastening portion 824 corresponding to the lock member 774 (see FIG. 16) of the pan-tilt 750 described later is formed.

[0047] Taking the height direction of the camera 100 as the Y-axis, the direction connecting the screw 827c facing the screw 827a (the horizontal direction on the paper surface of FIG. 14(b)) as the X-axis, and the direction connecting the screw 827d facing the screw 827b (the vertical direction on the paper surface of FIG. 14(b)) as the Z-axis. The XYZ axes are described as common to other figures as well.

[0048] FIG. 15 is a diagram for explaining a lock claw fastening portion 824 provided on the bottom surface of the camera 100. FIG. 15(a) is an exploded perspective view of the second housing 2 of the camera 100. The magnet 826 gives an attractive force and an adsorptive force to the camera 100 and a pan / tilt head 750 described later. The magnet 826 is fixed from the inside of a bottom cover 821 formed of a resin material by an adhesive or the like. The mount member 825 is fixed to the bottom cover 821 by four screws 827 (827a, 827b, 827c, 827d) arranged outside the lock claw fastening portion 824. The bottom cover 821 is fixed to a main base 2a formed of a resin material that serves as a base of the second housing 2 by four screws 821c. The cushion member 821d is a component having cushioning properties that serves as a leg for supporting the camera 100 and is attached directly above the four screws 821c.

[0049] Figure 15(b) is a bottom view of the camera 100, and Figure 15(c) is a cross-sectional view taken along line A-A. On the bottom cover 821, a lock groove 821f for restricting the rotation of the camera 100 and a pan / tilt unit 750 described later is arranged. The female screw portion 825a formed on the camera 100 has a nominal size of 1 / 4 of a unified fine thread, and the root diameter D33 of the screw is determined. The inner diameter D32 of the lock claw fastening portion 824 is larger than the root diameter D33 of the screw by the thickness to ensure the thickness required for the female screw portion 825a to have sufficient strength. Further, a slope 825b is formed around the female screw portion 825a in a direction where the diameter increases from the end of the female screw portion 825a. The end of the female screw portion 825a is formed at a position where a certain height is ensured from the bottom surface of the main body. By the slope portion 825b coming into contact with the inclined portion 752a of the centering pin 752 described later, the camera 100 and the pan / tilt unit 750 are centered. The central axis M of the female screw portion 825a coincides with the rotation axis P of the camera 100. Further, a flange portion (engagement portion) 825c is formed around the female screw portion 825a of the mount member 825. The flange portion 825c protrudes in the normal direction of the female screw portion 825a and is formed concentrically with the female screw portion 825a. The flange portion 825c has a cross-sectional shape formed by rotating around the central axis M, which consists of the inclined portion 825b, the bottom surface of the mount member 825, the right angle 824b connecting the outer diameter D34 and the bottom surface, the outer diameter D34, and the inclined portion 824a. The angle 824b comes into contact with a slope formed on the upper part of a lock claw portion 774a (see Figure 16) described later when the camera 100 is attached to the pan / tilt unit 750, and rotates the lock member 774. The outer diameter D34 of the lock claw fastening portion 824 is larger than the outermost diameter of the slope portion 825b by the thickness to ensure the thickness required for sufficient strength. The slope 824a is formed with the same inclination as the slope 774d (see Figure 17(a)) formed on the lower part of the lock claw portion 774a. Therefore, when the pan / tilt unit 750 and the camera 100 are fixed, the slope 824a and the slope 774d of the lock claw portion 774a are in contact over the entire surface. On the bottom surface of the second housing 2 composed of the bottom cover 821 and the mount member 825, a lock claw housing portion (housing portion) 821e for securing the movable locus space of a lock member 774 described later is formed. The lock claw fastening portion 824 is arranged so as not to protrude from the bottom surface of the bottom cover 821.The outer diameter D36 is set to a diameter with a certain gap from the movable locus of the lock member 774 and does not hinder the rotation of the lock member 774.

[0050] FIG. 16 is a diagram for explaining the pan-tilt unit 750. FIG. 16(a) is a front perspective view of the pan-tilt unit 750, FIG. 16(b) is an exploded perspective view of the pan-tilt unit 750, and FIG. 16(c) is an exploded perspective view of the lock mechanism 756. FIG. 17 is a diagram for explaining the lock member 774. FIG. 17(a) is a front perspective view of the lock member 774, and FIG. 17(b) is a front perspective view of the lock member 774. The height direction of the pan-tilt unit 750 is defined as the Y-axis, the short side direction of the pan-tilt unit 750 is defined as the X-axis, and the long side direction of the pan-tilt unit 750 is defined as the Z-axis. The XYZ axes are common to other figures and will be described accordingly.

[0051] First, referring to FIG. 16(a), the appearance of the pan-tilt unit 750 will be described. The pan-tilt unit 750 is mainly composed of a hinge cover 751 and a top cover 759 formed of a resin material. The hinge cover 751 and the top cover 759 are fixed such that their convex and concave portions overlap alternately, thereby forming the side surface of the pan-tilt unit 750. On the side surface in the long side direction of the pan-tilt unit 750, an operation portion 772d for releasing the fixed state of the camera 100 and the pan-tilt unit 750 is arranged in a pair. The operation portion 772d has an uneven shape on its surface for easy operation and is held movably in a direction parallel to the Y-axis. On the upper surface of the top cover 759, a positioning pin 759b for the camera 100 is formed. The cushion member 760 is attached to the upper surface of the top cover 759. Through holes 759a and 760a are provided in the top cover 759 and the cushion member 760. The through holes 759a and 760a have the same shape, and an opening through which the centering pin 752 that advances and retreats in the Y-axis direction passes is formed at the center. Around the opening through which the centering pin 752 passes, three openings are formed so as not to interfere with the rotation locus of the lock member 774.

[0052] The inclined portion 752a of the centering pin 752 is positioned to protrude from the locking member 774 in the Y-axis direction. Thus, when attempting to mount the camera 100 on the pan-tilt head 750, first, the inclined portion 752a of the centering pin 752 abuts against the inclined surface portion 825b formed around the female screw portion 825a of the camera 100, and the centering of the camera 100 and the pan-tilt head 750 is achieved. Further, by aligning the phase of the lock groove 821f of the camera 100 and the positioning pin 759b formed on the top cover 759 (hereinafter simply referred to as the mounting phase), the camera 100 is rotationally restricted with respect to the pan-tilt head 750.

[0053] Next, with reference to FIGS. 16(b) and 16(c), the components of the pan-tilt head 750 will be described. The pan-tilt head 750 includes a hinge cover 751, a locking mechanism 756, a magnet 758, a top cover 759, and a cushion member 760. The magnet 758 is disposed at a position facing the magnet 826 on the camera 100 side from the inside of the top cover 759 formed of a resin material and is fixed by an adhesive or the like. The magnet 758 imparts an attractive force and an adsorptive force to the camera 100 and the pan-tilt head 750.

[0054] In FIG. 16(c), to clearly show the configuration of the locking member 774, only one of the three locking members 774 and one of the three locking members 775 are disassembled from the lock portion holding member 773. The locking mechanism 756 includes a holder 770, a rotation restricting member 771, a rotation restricting member 772, a centering pin 752, a lock portion holding member 773, a locking member 774, and a locking member 775. The locking mechanism 756 is fastened to the top cover 759 with three screws centered on the centering pin 752.

[0055] When the centering pin 752 is fixed to the camera 100 and the pan / tilt head 750, it is arranged at a position where the central axis of the female screw portion 825a coincides with the central axis N of the centering pin 752. The centering pin 752 has shaft portions 752f and 752e with two diameters. The diameter of the shaft portion 752f is thinner than that of the shaft portion 752e, and the shaft portion 752f is located above the shaft portion 752e in the Y-axis direction. There is an inclined surface 752a at the tip of the shaft portion 752f, and an inclined surface 752b is formed between the shaft portion 752f and the shaft portion 752e. A flange portion 752c is formed at the lower end of the shaft portion 752e. The diameter of the flange portion 752c is larger than the diameter of the shaft portion 752e. A protrusion 752d (see Fig. 18(b)) is formed at the lower end of the flange portion 752c. The inclined portion 752b abuts against an inclined surface 825b formed around the female screw portion 825a of the camera 100 to center the camera 100 and the pan / tilt head 750. The centering pin 752 is held so as to be able to move forward and backward in a direction parallel to the Y-axis (the same axis direction as the central axis of the female screw portion 825a), and is biased upward in the Y-axis direction by a compression spring 7520.

[0056] The lock portion holding member 773 is provided with a through hole 773b. The through hole 773b is fitted so as to slide on the shaft portion 752e of the centering pin 752. Thereby, the centering pin 752 is restricted so as to be able to advance and retreat in a direction parallel to the Y axis, and the central axis during the advance and retreat is restricted. Around the through hole 773b of the lock portion holding member 773, three lock members 774 are arranged at equal intervals in a circular shape. The lock member 774 is formed with a lock claw portion 774a, a hole 774b, and a contact portion 774c. The inclined surface 774d formed at the lower portion of the lock claw portion 774a is formed with the same inclination as the inclined surface portion 824a of the camera 100. Therefore, when the pan-tilt 750 and the camera 100 are fixed, the inclined surface 824a and the inclined surface 774d engage with each other over the entire surface. The lock member 774 is formed with a hole 774b into which a shaft 774s can be inserted. The central axis N of the shaft 774s and the centering pin 752 are orthogonal to each other. The remaining two shafts 774s (not shown) are also orthogonal to the central axis N of the centering pin 752 in the same manner. The lock member 774 is held so as to be rotatable about the hole 774b by fixing the shaft 774s to the lock portion holding member 773. The lock member 774 is biased in the axial center direction of the centering pin 752 (hereinafter simply referred to as the engagement direction) by a lock spring 7740. The contact portion 774c contacts the contact surface 772c of the rotation restricting member 772 when the pan-tilt 750 and the camera 100 are fixed. Further, three lock members 775 are arranged at equal intervals in a circular shape on the lock portion holding member 773. The lock member 775 is arranged so as to be positioned between the lock members 774 arranged in a circular shape, and the lock member 774 and the lock member 775 do not overlap in projection in a view from the XZ plane. The lock member 775 is formed with a lock claw portion 775a, a hole 775b, and a contact portion 775c. The lock claw portion 775a engages with the directly upper portion 772a of the compression spring of the rotation restricting member 772. The lock member 775 is formed with a hole 775b into which a shaft 775s can be inserted. The lock member 775 is held so as to be rotatable about the hole 775b by fixing the shaft 775s to the lock portion holding member 773.

[0057] The rotation restricting member 772 is held so as to be able to advance and retreat in a direction parallel to the Y-axis (the direction coaxial with the central axis of the female screw portion 825a), and is biased upward in the Y-axis direction by a compression spring 7720. Three compression springs 7720 are arranged at the same position as the lock member 775 in the XZ plane projection. The rotation restricting member 771 is held so as to be able to advance and retreat in a direction parallel to the Y-axis, and is biased upward in the Y direction by a compression spring 7710. A convex shape 771a and a claw portion 771b are formed on the rotation restricting member 771. The convex shape 771a is formed at three locations at the same position as the lock member 775 in the XZ plane projection.

[0058] FIG. 18 is a diagram for explaining the structure of the pan-tilt 750. FIG. 18(a) is a diagram showing the cross-sectional position of the pan-tilt 750, and FIG. 18(b) is a cross-sectional view taken along line A-A of the pan-tilt 750 in the initial state.

[0059] First, with reference to FIG. 18(b), the detailed structure of the pan-tilt 750 will be described. The centering pin 752 is held so as to be movable back and forth in a direction parallel to the Y-axis and is biased upward in the Y direction by a compression spring 7520. The position of the centering pin 752 in the Y-axis direction is restricted when the flange portion 752c abuts against the contact portion 773a. The flange portion 752c and the contact portion 773a are arranged at three locations in a circular shape at equal intervals. The lock member 774 is held so as to be rotatable about the hole 774b and is biased in the engagement direction. The lock spring 7740 is a torsion spring, and the position of the lock member 774 in the engagement direction is restricted when the lock member 774 abuts against the contact surface 773c of the lock portion holding member 773. The lock member 775 is held so as to be rotatable about the hole 775b. The lower surface of the contact portion 775c abuts against the convex shape 771a of the rotation restricting member 771. The rotation restricting member 771 is held so as to be movable back and forth in a direction parallel to the Y-axis and is biased upward in the Y-axis direction by a compression spring 7710. Therefore, the lock member 775 is rotated in the direction of abutting against the rotation restricting member 772 (counterclockwise in the plane of FIG. 18(b)). The position of the rotation restricting member 771 in the Y-axis direction is restricted when the claw portion 771b abuts against the contact portion 770a of the holder 770. The rotation restricting member 772 is held so as to be movable back and forth in a direction parallel to the Y-axis and is biased upward in the Y-axis direction by a compression spring 7720. The position of the rotation restricting member 772 in the Y-axis direction is restricted when the directly upper portion 772a of the compression spring abuts against the lock claw portion 775a of the lock member 775.

[0060] Next, the operation of the pan-tilt unit 750 will be described. When the centering pin 752 moves downward in the Y-axis direction, the upper surface of the contact portion 775c comes into contact with the protrusion 752d. The rotation restricting member 771 is biased upward in the Y-axis direction by the compression spring 7710. Therefore, when the pushing force of the centering pin 752 downward in the Y-axis direction becomes greater than the biasing force of the compression spring 7710, the lock member 775 rotates in a direction away from the rotation restricting member 772 (clockwise in the paper plane of FIG. 18(b)) about the hole 775b. The rotation restricting member 772 has its position restriction in the Y-axis direction released when the lock member 775 rotates and the contact between the lock claw portion 774a and the rotation restricting member 772 is released. Therefore, the rotation restricting member 772 is biased upward in the Y-axis direction by the compression spring 7720 and moves. Since the rotation restricting member 772 moves in the Y-axis direction within the space formed by the hinge cover 751 and the top cover 759, it does not enter the lock claw accommodating portion 821e of the camera 100. At this time, the contact portion 774c of the lock member 774 comes into contact with the contact surface 772c of the rotation restricting member 772. Thereby, the rotation of the lock member 774 in the direction opposite to the engagement direction (clockwise in the paper plane of FIG. 18(b)) is restricted.

[0061] FIG. 19 is a diagram for explaining the operation of the lock mechanism 756 when the camera 100 is mounted on the pan-tilt unit 750. FIG. 19(a) is a diagram showing the cross-sectional position, FIG. 19(b) is a cross-sectional view taken along line A-A immediately before the camera 100 is mounted on the pan-tilt unit 750, FIGS. 19(c) and 19(d) are cross-sectional views taken along line A-A during the mounting process, and FIG. 19(e) is a cross-sectional view taken along line A-A after the mounting. When in the mounting phase, the XYZ axes of the camera 100 and the XYZ axes of the pan-tilt unit 750 are aligned and fixed as defined above.

[0062] Hereinafter, the step-by-step operation of the lock mechanism 756 will be described using the centering pin 752, the lock member 774, the lock member 775, the rotation restricting member 771, and the rotation restricting member 772 that form the lock mechanism 756.

[0063] First, with reference to FIG. 19(b), the state immediately before the camera 100 is attached to the pan-tilt unit 750 will be described. When the camera 100 and the pan-tilt unit 750 are brought closer in the mounting phase, the inclined portion 752b of the centering pin 752 abuts against the inclined surface portion 825b of the mount member 825, and the camera 100 and the pan-tilt unit 750 are centered. The lock member 774 is biased in the engaging direction by a lock spring 7740, and its position in the engaging direction is restricted by abutting against the abutting surface 773c. The lock member 775 is biased in the direction of abutting against the rotation restricting member 772 (counterclockwise on the plane of FIG. 19(b)) by the rotation restricting member 771 biased upward in the Y-axis direction. The position of the rotation restricting member 772 in the Y-axis direction is restricted by the compression spring straight upper portion 772a abutting against the lock claw portion 775a of the lock member 775.

[0064] Next, with reference to FIGS. 19(c) and 19(d), the state during the attachment of the camera 100 to the pan-tilt unit 750 will be described. FIG. 19(c) shows the state in which the lock member 774 rotates when the camera 100 is pushed downward in the Y-axis direction with respect to the pan-tilt unit 750. When the camera 100 is pushed downward in the Y-axis direction with respect to the pan-tilt unit 750, the inclined surface 774e formed on the upper portion of the lock claw portion 774a abuts against the corner 824b formed on the flange portion 825c. Then, the lock member 774 rotates and retracts in the direction opposite to the engaging direction (clockwise on the plane of FIG. 19(c)) about the hole 774b. At this time, the lock member 775 and the rotation restricting member 772 are in the same state as in FIG. 19(b) immediately before the camera 100 is attached to the pan-tilt unit 750.

[0065] FIG. 19(d) shows the state in which the locking member 775 rotates when the camera 100 is further pushed downward in the Y-axis direction with respect to the pan head 750. When the camera 100 is further pushed downward in the Y-axis direction from the state of FIG. 19(c), the locking claw portion 774a rotates to a position where it abuts against the inclined surface portion 824a after getting over the corner 824b formed on the flange portion 825c. At this time, the upper surface of the contact portion 775c of the locking member 775 abuts against the protruding portion 752d of the centering pin 752. When the pushing force of the centering pin 752 downward in the Y-axis direction becomes greater than the biasing force of the compression spring 7710, the locking member 775 rotates in a direction away from the rotation restricting member 772 (clockwise on the paper surface of FIG. 19(d)) about the hole 775b.

[0066] Next, with reference to FIG. 19(e), the state in which the camera 100 is mounted on the pan head 750 will be described. When the camera 100 is further pushed downward in the Y-axis direction from the state of FIG. 19(d), the locking member 774 rotates in the engaging direction (counterclockwise on the paper surface of FIG. 19(e)) about the hole 774b as the axis. At this time, the inclined surface 774d formed at the lower portion of the locking claw portion 774a engages with the inclined surface portion 824a formed on the mount member 825 over the entire surface. When the pushing force of the centering pin 752 downward in the Y-axis direction becomes greater than the biasing force of the compression spring 7710, the locking member 775 rotates in a direction away from the rotation restricting member 772 (clockwise on the paper surface of FIG. 19(e)) about the hole 775b. When the locking member 775 rotates and the engaging portion with the rotation restricting member 772 is disengaged, the position restriction in the Y-axis direction of the rotation restricting member 772 is released. Therefore, the rotation restricting member 772 is biased upward in the Y-axis direction by the compression spring 7720 and moves. At this time, the contact portion 774c of the locking member 774 abuts against the contact surface 772c of the rotation restricting member 772. Thereby, the rotation of the locking member 774 in the direction opposite to the engaging direction (clockwise on the paper surface of FIG. 19(e)) is restricted.

[0067] Also, referring to FIG. 19(e), a method for releasing the fixation between the camera 100 and the pan-tilt unit 750 will be described. The lock member 774 that fixes the camera 100 and the pan-tilt unit 750 cannot be retracted in the direction opposite to the engagement direction (clockwise on the plane of FIG. 19(e)) by the rotation restricting member 772 that is biased upward in the Y-axis direction. The lock member 774 can be rotated by disengaging the engaging portion with the contact surface 772c by grasping the operation portion 772d formed on the rotation restricting member 772 with a finger and moving it downward in the Y-axis direction. When the engaging portion between the contact surface 772c and the contact portion 774c is disengaged, the camera 100 can be easily removed from the pan-tilt unit 750 simply by lifting it upward in the Y-axis direction.

[0068] That is, the user only needs to place the camera 100 on the pan-tilt unit 750 and move it downward in the Y-axis direction, and the mechanical fixing state by the lock mechanism 756 is achieved. Thus, it can be attached without performing troublesome operations such as turning a screw as in a conventional tripod accessory or the like.

[0069] The disclosure of the present embodiment includes the following configurations. (Configuration 1) An electronic device having a fastening member including a first screwing portion and a first locking portion, and a rotary locking member that rotates about the central axis of the fastening member and includes a second locking portion that engages with the first locking portion, wherein the accessory device is detachable, The fastening member is coaxially positioned with the first screwing portion and is provided outside the first screwing portion and inside the electronic device, characterized in that the electronic device is an electronic device. (Configuration 2) An exterior member that forms a part of the exterior surface of the electronic device, And a mount member fixed to the exterior member, The first screwing portion is formed on the exterior member, The first locking portion extends from the mount member in the central direction of the first screwing portion, characterized in that the electronic device according to Configuration 1 is an electronic device. (Configuration 3) It further has a screwing member on which the first screwing portion is formed, The electronic device according to Configuration 1, wherein the first locking portion is formed to extend outward from the center of the first threaded portion of the threaded member. (Configuration 4) An accessory device detachable from an electronic device having a rotary locking member and including a fastening member having a first threaded portion and a first locking portion, wherein the fastening member is coaxially positioned with the first threaded portion and is provided outside the first threaded portion and inside the electronic device, The accessory device, wherein the rotary locking member rotates about the central axis of the fastening member and includes a second locking portion that engages with the first locking portion. (Configuration 5) The accessory device according to Configuration 4, further comprising a pan head on which the electronic device is mounted and a centering pin disposed about the rotation axis of the rotary locking member, wherein the centering pin is movable forward and backward in a direction parallel to the rotation axis with respect to the pan head and is biased in the protruding direction. (Configuration 6) The accessory device according to Configuration 5, further comprising a rotary operation member rotatably held by the pan head, wherein the centering pin includes a second threaded portion that is screwed into the first threaded portion provided at the tip protruding from the pan head and is integrally rotatably held with the rotary operation member. (Configuration 7) The accessory device according to Configuration 5, further comprising a push pin, wherein the electronic device includes a hole formed on the same plane as the fastening member and outside the outer diameter of the fastening member, and the push pin is movable forward and backward in a direction parallel to the rotation axis with respect to the pan head and is biased in the protruding direction to be in a first position before the accessory device is attached to the electronic device, and moves to a second position where it is fitted into and pressed down by the hole after the accessory device is attached to the electronic device. (Configuration 8) The push pin includes a convex portion inside the pan head, The convex portion extends in a direction orthogonal to the direction in which the push pin moves forward and backward and in the central direction of the rotation locking member, and engages with the concave portion of the rotation locking member to restrict the rotation of the rotation locking member. In the direction in which the push pin moves forward and backward, the amount of engagement between the convex portion and the concave portion in the protruding state is smaller than the amount of movement from the first position to the second position. The accessory device according to Configuration 7. (Configuration 9) The rotation locking member is biased in the direction of engaging with the first locking portion. The accessory device according to Configuration 8. (Configuration 10) It is rotatably held by the pan-tilt, and further has a release member that moves the rotation locking member from a locked position where it engages with the first engaging portion to an unlocked position where it does not engage with the first engaging portion. When the rotation locking member is in the unlocked position, the amount of protrusion of the release member from the side surface of the pan-tilt is larger than the amount of protrusion of the release member from the side surface of the pan-tilt when the rotation locking member is in the locked position. The accessory device according to Configuration 9. (Configuration 11) It further has a magnet holder for fixing the magnet. The electronic device includes a magnetic body inside. The magnet holder is held so as to be movable forward and backward in a direction parallel to the rotation axis with respect to the pan-tilt. The magnet holder includes a convex portion inside the pan-tilt. The convex portion extends in a direction orthogonal to the direction in which the magnet holder moves forward and backward and in the central direction of the rotation locking member, and engages with the concave portion of the rotation locking member to restrict the rotation of the rotation locking member. When the accessory device is attached to the electronic device, the magnet holder moves in a direction parallel to the rotation axis by the magnet, the restriction of the rotation of the rotation locking member by the convex portion is released, the rotation locking member rotates around the fastening member, and engages with the first locking portion. The accessory device according to Configuration 5. (Configuration 12) It further includes a magnet holder for fixing the magnet and a push pin. The electronic device includes a hole formed on the same plane as the fastening member and outside the outer diameter of the fastening member, and a magnetic body on the inner surface side of the electronic device with respect to the hole. The magnet holder and the push pin are held so as to be able to move forward and backward in a direction parallel to the rotation axis with respect to the pan-tilt head. The magnet holder and the push pin are provided with convex portions inside the pan-tilt head. The convex portion extends in a direction orthogonal to the direction in which the magnet holder and the push pin move forward and backward and in the central direction of the rotation locking member, and engages with the concave portion of the rotation locking member to restrict the rotation of the rotation locking member. When the accessory device is attached to the electronic device, the magnet holder is moved by the magnet, the push pin is fitted into the hole and moves to a second position, the restriction on the rotation of the rotation locking member by the convex portion is released, the rotation locking member rotates around the fastening member, and engages with the first locking portion. The accessory device according to Configuration 5, characterized in that. (Configuration 13) An electronic device having a first threaded portion and an engaging portion protruding in the normal direction of the first threaded portion and formed concentrically with the first threaded portion, and the accessory device is detachable. The engaging portion engages with a lock member provided on the accessory device and rotatable about an axis orthogonal to the central axis of the first threaded portion. The electronic device is characterized in that. (Configuration 14) It further has a housing portion for housing the lock member. The housing portion is arranged outside the first threaded portion and at a position not protruding from the bottom surface of the electronic device. The electronic device according to Configuration 13, characterized in that. (Configuration 15) An accessory device to which an electronic device having a first threaded portion and an engaging portion protruding in the normal direction of the first threaded portion and formed concentrically with the first threaded portion is detachable. An accessory device, characterized by having a locking member that rotates about an axis orthogonal to the central axis of the first threaded portion and engages with the engaging portion. (Configuration 16) A rotation restricting member that can move forward and backward in the coaxial direction with the central axis of the first threaded portion, Further having a centering pin that can move forward and backward in the coaxial direction with the central axis of the first threaded portion and moves the accessory device to the side of the first threaded portion, The rotation restricting member moves forward and backward in response to the movement of the centering pin in the direction toward the electronic device, The accessory device according to Configuration 15, characterized in that it transitions between a first state in which the locking member is rotatable and a second state in which rotation is restricted by the rotation restricting member. (Configuration 17) The rotation restricting member is held so as to be able to move forward and backward in the direction toward the electronic device inside the accessory device and does not enter the inside of the electronic device. The accessory device according to Configuration 16 As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist.

Explanation of Reference Numerals

[0070] 100 Camera (electronic device) 500 Grip accessory (accessory device) 21a, 220a Female threaded portion (first threaded portion) 24, 324 Bayonet fastening portion (fastening member) 25a, 325a Mount claw portion (first locking portion) 556, 656 Bayonet member (rotation locking member) 556b Bayonet claw portion (second locking portion)

Claims

1. An electronic device having a fastening member including a first threaded portion and a first locking portion, and a rotatable locking member that rotates about the central axis of the fastening member and includes a second locking portion that engages with the first locking portion, wherein the accessory device is detachable, The fastening member is located coaxially with the first threaded portion and is provided outside the first threaded portion and inside the electronic device. An electronic device characterized by this.

2. Further comprising an exterior member that forms a part of the exterior surface of the electronic device, And a mounting member fixed to the exterior member, The first threaded portion is formed on the exterior member, The first locking portion is formed by extending from the mounting member in the central direction of the first threaded portion. The electronic device according to claim 1, characterized by this.

3. Further comprising a threaded member on which the first threaded portion is formed, The first locking portion is formed by extending from the threaded member outward from the center of the first threaded portion. The electronic device according to claim 1, characterized by this.

4. An accessory device detachable from an electronic device having a rotatable locking member and including a fastening member including a first threaded portion and a first locking portion, The fastening member is located coaxially with the first threaded portion and is provided outside the first threaded portion and inside the electronic device, The rotatable locking member rotates about the central axis of the fastening member and includes a second locking portion that engages with the first locking portion. An accessory device characterized by this.

5. Further comprising a pan-tilt on which the electronic device is mounted, and a centering pin disposed about the rotation axis of the rotatable locking member, The centering pin is movable forward and backward in a direction parallel to the rotation axis with respect to the pan-tilt and is biased in the protruding direction. The accessory device according to claim 4, characterized by this.

6. Further comprising a rotary operation member rotatably held by the pan-tilt, The centering pin includes a second threaded portion that threads into the first threaded portion provided at the tip protruding from the pan-tilt, and is rotatably held integrally with the rotary operation member. The accessory device according to claim 5, characterized by this.

7. Further comprising a push pin, The electronic device includes a hole portion formed on the same plane as the fastening member and outside the outer diameter of the fastening member. Before the accessory device is attached to the electronic device, the push pin is movable forward and backward in a direction parallel to the rotation axis with respect to the pan-tilt head, and is in a first position biased in the protruding direction. After the accessory device is attached to the electronic device, the accessory device according to claim 5 is characterized in that it moves to a second position fitted into and pressed down by the hole portion.

8. The push pin includes a convex portion inside the pan-tilt head, The convex portion extends in a direction orthogonal to the direction in which the push pin moves forward and backward and in the central direction of the rotation locking member, and engages with the concave portion of the rotation locking member to restrict the rotation of the rotation locking member. The accessory device according to claim 7 is characterized in that, in the direction in which the push pin moves forward and backward, the amount of engagement between the convex portion and the concave portion in the protruding state is smaller than the amount of movement from the first position to the second position.

9. The accessory device according to claim 8 is characterized in that the rotation locking member is biased in a direction to engage with the first locking portion.

10. The accessory device further includes a release member that is rotatably held by the pan-tilt head and moves the rotation locking member from a locked position engaging with the first locking portion to an unlocked position not engaging with the first locking portion. The accessory device according to claim 9 is characterized in that the amount of protrusion of the release member from the side surface of the pan-tilt head when the rotation locking member is in the unlocked position is larger than the amount of protrusion of the release member from the side surface of the pan-tilt head when the rotation locking member is in the locked position.

11. The accessory device further includes a magnet holder for fixing a magnet. The electronic device includes a magnetic body inside. The magnet holder is held so as to be movable forward and backward in a direction parallel to the rotation axis with respect to the pan-tilt head. The magnet holder includes a convex portion inside the pan-tilt head. The convex portion extends in a direction orthogonal to the direction in which the magnet holder moves forward and backward and in the central direction of the rotation locking member, and engages with the concave portion of the rotation locking member to restrict the rotation of the rotation locking member. When the accessory device is attached to the electronic device, the magnet holder is moved in a direction parallel to the rotation axis by the magnet, the restriction of the rotation of the rotation locking member by the convex portion is released, the rotation locking member rotates about the fastening member, and engages with the first locking portion. The accessory device according to claim 5 is characterized in that.

12. further comprising a magnet holder for fixing a magnet and a push pin, the electronic device includes a hole formed on the same plane as the fastening member and outside the outer diameter of the fastening member, and a magnetic body on the inner surface side of the electronic device with respect to the hole, the magnet holder and the push pin are held so as to be able to move forward and backward in a direction parallel to the rotation axis with respect to the pan-tilt head, the magnet holder and the push pin include a convex portion inside the pan-tilt head, the convex portion extends in a direction orthogonal to the direction in which the magnet holder and the push pin move forward and backward and in the central direction of the rotation locking member, and engages with the concave portion of the rotation locking member to restrict the rotation of the rotation locking member, when the accessory device is attached to the electronic device, the magnet holder is moved by the magnet, the push pin is fitted into the hole and moves to a second position, the restriction on the rotation of the rotation locking member by the convex portion is released, the rotation locking member rotates about the fastening member, and engages with the first locking portion. The accessory device according to claim 5, characterized in that.

13. an electronic device having a first screwing portion and an engaging portion protruding in the normal direction of the first screwing portion and formed concentrically with the first screwing portion, and the accessory device is detachable, the engaging portion engages with a locking member provided on the accessory device and rotatable about an axis orthogonal to the central axis of the first screwing portion. The electronic device is characterized in that.

14. further comprising a housing portion for housing the locking member, the housing portion is arranged outside the first screwing portion and at a position not protruding from the bottom surface of the electronic device. The electronic device according to claim 13, characterized in that.

15. an accessory device to which an electronic device having a first screwing portion and an engaging portion protruding in the normal direction of the first screwing portion and formed concentrically with the first screwing portion is detachable, the accessory device is characterized by having a locking member that rotates about an axis orthogonal to the central axis of the first screwing portion and engages with the engaging portion.

16. a rotation restricting member that can move forward and backward in the coaxial direction with the central axis of the first screwing portion, further comprising a centering pin that can move forward and backward in the coaxial direction with the central axis of the first screwing portion and moves the accessory device toward the electronic device on the side of the first screwing portion, the rotation restricting member moves forward and backward in response to the movement of the centering pin in the direction toward the electronic device, The accessory device according to claim 15, characterized in that it transitions between a first state in which the lock member is rotatable and a second state in which rotation is restricted by the rotation restricting member.

17. The accessory device according to claim 16, characterized in that the rotation restricting member is held so as to be movable forward and backward in a direction toward the electronic device inside the accessory device and does not enter the inside of the electronic device.

Images