JP5963471B2 - Accessory equipment - Google Patents

Description

The present invention relates to a camera accessory shoe mounted luer Kusesari devices, and particularly relates to luer Kusesari device comprising a contact pin for connecting the camera to the electronic circuit electrically.

  As a camera accessory device having a connection pin for electrical connection with the electronic circuit of the camera, a strobe that contacts the contact pin spring-biased with the camera-side accessory shoe in contact with the electrical contact of the camera-side accessory shoe An apparatus has been proposed (Patent Document 1).

JP 2008-175924 A

  By the way, the contact pin of the camera accessory device and the electrical contact of the camera-side accessory shoe are normally exposed, so that an electrical coating resistance is formed by forming an oxide film on the surface when left for a long period of time. Will increase and cause malfunctions. In this case, it is conceivable to apply a large biasing force sufficient to break the oxide film to the contact pins of the camera accessory device.

  However, when a large biasing force is applied to the contact pin of the strobe device of Patent Document 1, the contact pin that protrudes during mounting on the camera-side accessory shoe causes the electrical contact of the camera-side accessory shoe and the resin portion around the electrical contact. Slide.

  For this reason, the camera-side accessory shoe may become wrinkled due to repeated mounting and dismounting of the stroboscopic device several times, which may cause a problem in appearance, and may cause contact failure due to resin powder or the like.

Accordingly, the present invention is to prevent multiple detachable repeated Telling scratches on the camera accessory shoe by a, without being affected by such oxide film, it certainly secure electrical connection between the camera an object of the present invention is to provide an accessory equipment.

To achieve the above object, an accessory device according to the present invention is an accessory device that is detachably attached to a camera-side accessory shoe having an electrical contact, and engages with an operating member and the camera-side accessory shoe. A shoe member, a contact pin that contacts the electrical contact in a state where the shoe member is engaged with the camera-side accessory shoe, and the shoe member is attached to the camera-side accessory shoe in conjunction with the operation of the operating member. A moving member that moves to a position to lock and a position to release the lock of the shoe member, and the contact pin is in the position to release the lock even when the moving member is in the lock position are also exposed by projecting tip, when the moving member is in the position to the lock, the movable member releases the lock Than when in the that position, characterized in that it is biased in accordance with the movement of the moving member as a force in the direction of projecting increases.
Furthermore, the accessory device according to the present invention is an accessory device that is detachably attached to the imaging device, the first position for fixing the accessory device to the attached imaging device, and the attached device. A moving member movable to a second position for releasing the fixing of the accessory device to the imaging device; a contact member contacting an electrical contact provided in the mounted imaging device; and the moving member in response to movement to the first position from the second position, have a, a biasing mechanism to increase the force in the direction of projection of said contact member, the contact member, the position of the moving member Regardless of the feature, the tip protrudes and is exposed .

According to accessory equipment of the present invention, it is possible to prevent the take scratches on the camera accessory shoe by repeating a plurality of times of attachment and detachment, without being affected by such oxide film, electrical and camera Connection can be ensured reliably.

It is a schematic block diagram which shows the state which connected the strobe apparatus which is an example of embodiment of the accessory apparatus for cameras of this invention to the digital camera. (A) is a perspective view which shows the lock release state of an accessory shoe, (b) is a perspective view which shows the lock state of an accessory shoe. It is a schematic exploded perspective view of an accessory shoe. It is an external appearance perspective view which shows a camera side accessory shoe. (A) is a sectional side view of the accessory shoe on the strobe device side in the unlocked state, and (b) is a sectional side view of the accessory shoe on the strobe device side in the locked state. (A) is a central sectional view of the unlocked state of the accessory shoe on the strobe device side as seen from the back side of the camera, and (b) is a central sectional view of the locked state of the accessory shoe on the strobe device side as seen from the back side of the camera. It is.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic block diagram showing a state in which a strobe device as an example of an embodiment of a camera accessory device of the present invention is connected to a digital camera.

  In FIG. 1, a digital camera (hereinafter referred to as a camera) 101 includes a photographing lens 9, an aperture 10, an image sensor 11, a camera side accessory shoe 200, a signal processing circuit 13, a CPU 14, and the like.

  The subject image that has passed through the photographing lens 9 is formed on the image sensor 11, and the image signal output from the image sensor 11 is subjected to predetermined signal processing by the signal processing circuit 13.

  The strobe device 100 includes a back operation unit 1, a xenon tube 2, a reflector 3, a Fresnel lens 4, a strobe circuit 6, a control circuit 7, an accessory shoe 102, and the like.

  The flash emitted from the xenon tube 2 is reflected by the reflector 3, and the Fresnel lens 4 controls the light distribution of the light beam reflected by the reflector 3. The strobe circuit 6 includes a booster circuit and a trigger circuit that cause the xenon tube 2 to emit light.

  The contact pin 8 of the accessory shoe 102 is electrically connected to the camera-side accessory shoe 200, thereby enabling communication between the control circuit 7 and the CPU 14 of the camera 101.

  The control circuit 7 performs light emission control of the xenon tube 2 in accordance with a control command from the CPU 14 of the camera 101. In addition, the control circuit 7 performs processing for detecting operation information of the rear operation unit 1, processing for transmitting the device status of the strobe device 100 according to a request from the CPU 14 of the camera 101, and the like.

  Next, the accessory shoe 102 of the strobe device 100 will be described with reference to FIGS.

  2A is a perspective view showing the unlocked state of the accessory shoe 102, FIG. 2B is a perspective view showing the locked state of the accessory shoe 102, and FIG. 3 is a schematic exploded perspective view of the accessory shoe 102.

  As shown in FIGS. 2 and 3, the accessory shoe 102 includes a shoe case 15, a lock lever 18, a lock release button 19, a shoe mold 17, an accessory shoe holding member 20, a shoe fitting 23, and a contact spring holding member 26. .

  The shoe case 15 is formed with a plurality of screw holes 16 for screwing the accessory shoe 102 on the bottom side of the strobe device 100.

  The lock lever 18 corresponds to an example of the operation member of the present invention, is formed in a ring shape, and can be rotated in a range of approximately 60 °. A part of the lock lever 18 in the circumferential direction is provided with a lever portion 18a protruding outward in the radial direction. A cam portion 18 b is provided on the inner peripheral portion of the lock lever 18.

  In the unlocked state of the accessory shoe 102 shown in FIG. 2A, the cam surface 18e of the cam portion 18b is cam-engaged with an engaging portion 20b of the accessory shoe holding member 20 described later. 2B, the cam surface 18d of the cam portion 18b is cam-engaged with the engaging portion 20b of the accessory shoe holding member 20. In the locked state of the accessory shoe 102 shown in FIG.

  A recess 18c is formed in the vicinity of the lever portion 18a of the lock lever 18, and a lock release button 19 is incorporated in the recess 18c. A biasing member 24 that biases the lock release button 19 outward in the radial direction of the lock lever 18 is incorporated between the recess 18 c and the lock release button 19. The lock release button 19 is formed with a lock engaging portion 19a.

  In the shoe case 15, a rail portion 15 a is formed in which the lock engaging portion 19 a slides in the rotation operation direction of the lock lever 18. When the lock lever 18 is in the lock position of the accessory shoe 102 shown in FIG. 2B, the lock locking portion 19a enters the locking groove 15c formed in the rail portion 15a by the biasing force of the biasing member 24. And locked.

  When unlocking the accessory shoe 102, when the lock release button 19 is pushed against the biasing force of the biasing member 24, the lock latching portion 19a is detached from the latching groove 15c and the lock lever 18 is locked. It is possible to perform a rotation operation in the release direction.

  On the other hand, when the lock lever 18 is in the unlocked position of the accessory shoe 102 shown in FIG. 2A, the lock engaging portion 19 a is an engaging groove 15 d formed in the rail portion 15 a by the urging force of the urging member 24. Entered and locked.

  Here, the locking groove 15d has an inclined portion that allows the lock locking portion 19a to be detached from the locking groove 15d without pressing the lock release button 19 against the biasing force of the biasing member 24. 15b is formed. Therefore, the lock lever 18 can be turned in the lock position direction without pressing the lock release button 19 against the urging force of the urging member 24.

  The shoe mold 17 includes a disc portion 17a into which the inner peripheral portion of the lock lever 18 is fitted, and a substantially rectangular parallelepiped guide portion 17b formed on the lower end surface of the disc portion 17a.

  The accessory shoe holding member 20 has a cylindrical shape, and a rectangular insertion hole 20a into which the guide portion 17b is inserted is formed at the center thereof. On the outer peripheral side of the end surface of the accessory shoe holding member 20 that faces the guide portion 17b, an engaging portion 20b that the cam portion 18b engages is provided.

  The shoe fitting 23 corresponds to an example of the shoe member of the present invention. The shoe fitting 23 has a through hole 23a through which the lock pin 22 passes and a plurality of screw holes 23b for screwing to the bottom surface of the guide portion 17b. Is formed.

  The contact spring holding member 26 is provided with a pair of arm portions 26a that are separated from each other by approximately 180 ° in the circumferential direction, and a screw insertion hole 26b through which the stepped screw 25 is inserted is formed in the arm portion 26a. Further, the contact spring holding member 26 is provided with contact holding portions 26 c that hold the plurality of contact pins 8 corresponding to the number of contact pins 8.

  A contact urging member 27 that urges the contact pin 8 toward the electrical contacts 204 and 205 (see FIG. 4) of the camera side accessory shoe 200 is supported between the contact holding portion 26 c and the stepped portion 8 a of the contact pin 8. Has been. Here, the contact spring holding member 26 and the accessory shoe holding member 20 correspond to an example of the moving member of the present invention.

  The lock pin 22 is provided with a stopper 30 that abuts against the accessory shoe holding member 20 at the axial center thereof. One end of the lock pin 22 is inserted into a hole 17 f (see FIG. 5) formed in the shoe mold 17 and a through hole 23 a formed in the shoe fitting 23. A coil spring 29 is extrapolated to the other end of the lock pin 22, and the other end of the lock pin 22 is inserted into a recess 15 e (see FIG. 5) formed in the shoe case 15.

  The coil spring 29 is disposed in a compressed state between the peripheral surface of the opening of the recess 15e of the shoe case 15 and the stopper 30, thereby urging the lock pin 22 toward the shoe fitting 23. When the accessory shoe 102 is unlocked, the lock pin 22 is held by the accessory shoe holding member 20 at a position that does not protrude from the shoe fitting 23.

  Next, the camera side accessory shoe 200 to which the strobe device 100 is detachably attached will be described with reference to FIG. FIG. 4 is an external perspective view showing the camera side accessory shoe 200. The camera-side accessory shoe 200 is well known and will be described briefly.

  As shown in FIG. 4, in the camera-side accessory shoe 200, a resin shoe pedestal 202 is fixed to an upper surface portion of an exterior cover 201 of the camera 101 together with a shoe plate 203 by screws (not shown). Electrical contacts 204 and 205 are integrally formed on the shoe pedestal 202.

  The camera-side accessory shoe 200 is provided with a metal shoe plate 203 with which the shoe fitting 23 of the accessory shoe 102 of the strobe device 100 is engaged. The shoe fitting 23 is inserted into the shoe plate 203 from the back side of the camera 101.

  The shoe plate 203 is provided with a pair of left and right insertion guide portions as viewed from the direction in which the shoe fitting 23 is inserted. The shoe plate 203 is formed with a lock hole 206 into which the lock pin 22 of the accessory shoe 102 is inserted and removed. A shoe spring 207 is attached to the upper surface of the shoe pedestal 202 to prevent the shoe metal fitting 23 inserted in the shoe plate 203 from rattling in the vertical direction.

  5A is a side sectional view of the accessory shoe 102 on the strobe device 100 side in the unlocked state, and FIG. 5B is a side sectional view of the accessory shoe 102 on the strobe device 100 side in the locked state.

  6A is a central cross-sectional view of the unlocked state of the accessory shoe 102 on the strobe device 100 side as viewed from the back side of the camera 101. FIG. FIG. 6B is a central cross-sectional view of the accessory shoe 102 on the strobe device 100 side in a locked state as viewed from the back side of the camera 101.

  As shown in FIGS. 3 and 5A, the stepped screw 25 has a head portion 25b disposed at one end of the shaft portion 25c and a screw shaft 25a having a smaller diameter than the shaft portion 25c disposed at the other end of the shaft portion 25c. A shaft spring 28 is extrapolated to the shaft portion 25c.

  The stepped screw 25 is inserted into the screw insertion hole 26b formed in the arm portion 26a of the contact spring holding member 26 and the large diameter hole portion 17d of the stepped hole 17c formed in the shoe mold 17 to The shaft 25 a is screwed to the accessory shoe holding member 20.

  At this time, the head portion 25b of the stepped screw 25 abuts on the arm portion 26a of the contact spring holding member 26, and the shaft spring 28 externally inserted into the shaft portion 25c of the stepped screw 25 has a stepped hole 17c. The bottom surface 17e of the contact spring and the arm portion 26a of the contact spring holding member 26 are disposed.

  When the accessory shoe 102 is unlocked, the lever portion 18a of the lock lever 18 is in the position shown in FIG. 2 (a), and the clearance between the accessory shoe holding member 20 and the shoe fitting 23 is shown in FIG. 6 (a). Becomes C1. In this state, the shoe plate 203 of the camera-side accessory shoe 200 can be inserted between the accessory shoe holding member 20 and the shoe fitting 23.

  At this time, the cam surface 18e (see FIG. 3) of the cam portion 18b of the lock lever 18 is cam-engaged with the engagement portion 20b of the accessory shoe holding member 20. In this state, as shown in FIGS. 5 (a) and 6 (a), the accessory shoe holding member 20 includes the bottom surface portion 17e of the large-diameter hole portion 17d of the stepped hole 17c of the shoe mold 17 and the contact spring holding member. It is urged upward by a shaft spring 28 disposed between the 26 arm portions 26a.

  Therefore, the contact spring holding member 26 is disposed at the raised position, and the contact urging member 27 that urges the contact pin 8 is hardly compressed. For this reason, when the accessory shoe 102 of the strobe device 100 is attached to the camera-side accessory shoe 200, the plurality of contact pins 8 are in contact with the electrical contacts 204, 205, but are attached to the electrical contacts 204, 205. The power is getting smaller.

  On the other hand, in the locked state of the accessory shoe 102, the lever portion 18a of the lock lever 18 is at the position shown in FIG. 2B, and the clearance between the accessory shoe holding member 20 and the shoe fitting 23 is shown in FIG. 6B. Becomes C2 (C1> C2). In this state, the shoe plate 203 of the camera side accessory shoe 200 is clamped between the accessory shoe holding member 20 and the shoe fitting 23.

  That is, the accessory shoe holding member 20 is integrated with the contact spring holding member 26 in conjunction with the turning operation of the lock lever 18 by the cam action of the engaging portion 20b and the cam portion 18b of the lock lever 18. The spring 28 moves downward against the biasing force of the spring 28 and is positioned at the lowered position. At this time, the cam surface 18d (see FIG. 3) of the cam portion 18b of the lock lever 18 is cam-engaged with the engagement portion 20b of the accessory shoe holding member 20.

  In this state, the contact urging member 27 that urges the contact pin 8 is pressed and compressed by the contact spring holding member 26, and the plurality of contact pins 8 applied a large urging force to the electrical contacts 204 and 205. Contact in state.

  Further, as described above, the lock pin 22 is held by the stopper 30 in contact with the accessory shoe holding member 20 and is urged downward (on the shoe fitting 23 side) by the coil spring 29. Therefore, when the accessory shoe holding member 20 is lowered, the lock pin 22 is moved by the same distance as the accessory shoe holding member 20 by the biasing force of the coil spring 29 and protrudes from the shoe fitting 23.

  Then, the protruding portion of the lock pin 22 from the shoe fitting 23 is fitted into the lock hole 206 of the camera side accessory shoe 200, thereby preventing the strobe device 100 from falling off the camera side accessory shoe 200.

  As described above, in the present embodiment, when the accessory shoe 102 is locked, the contact pin 8 is pressed against the electrical contacts 204 and 205 of the camera-side accessory shoe 200 with a larger urging force than when the lock is released. For this reason, the contact pin 8 breaks the oxide film or the like attached to the electrical contacts 204 and 205, and the strobe device 100 and the camera 101 are reliably electrically connected. Further, when the strobe device 100 is attached / detached, the accessory shoe 102 is unlocked, so that the contact pin 8 contacts the electrical contacts 204 and 205 with a small urging force.

  Accordingly, it is possible to prevent the camera-side accessory shoe 200 from being wrinkled due to repeated attachment and detachment of the strobe device 100, and to be electrically connected to the camera 101 without being affected by an oxide film or the like. Can be ensured.

  The configuration of the present invention is not limited to that exemplified in the above embodiment, and the material, shape, dimensions, form, number, arrangement location, and the like can be changed as appropriate without departing from the scope of the present invention. It is.

  For example, in the above embodiment, the accessory shoe in the strobe device, which is an example of the camera accessory device, has been described. However, the present invention can also be applied to an accessory shoe in a camera accessory device such as a communication device or a GPS unit.

8 Contact Pin 18 Lock Lever 20 Accessory Shoe Holding Member 23 Shoe Fitting 26 Contact Spring Holding Member 27 Contact Biasing Member 100 Strobe Device 101 Camera 102 Accessory Shoe 200 Camera Side Accessory Shoe 204, 205 Electrical Contact

Claims (4)

An accessory device that is detachably attached to a camera-side accessory shoe having electrical contacts,
An operation member;
A shoe member engaged with the camera-side accessory shoe;
A contact pin that contacts the electrical contact with the shoe member engaged with the camera-side accessory shoe;
In conjunction with the operation of the operation member, a moving member that moves to a position that locks the shoe member relative to the camera-side accessory shoe and a position that unlocks the shoe member,
The contact pin protrudes and is exposed when the moving member is in the locking position and in the unlocking position, and when the moving member is in the locking position, the movement is performed. accessory device, characterized in that the member is from when in the position for releasing the lock is biased in accordance with the movement of the moving member as a force in the direction of projecting increases. The operation member has a cam portion and can be rotated.
The moving member has an engaging portion with which the cam portion is cam-engaged,
When the operation member is rotated, the moving member moves to a position where the shoe member is locked and a position where the shoe member is unlocked by the cam action of the cam portion and the engaging portion. The accessory device according to claim 1.   The moving member supports a contact urging member that urges the contact pin in contact with the electric contact in the direction of the electric contact, and compresses the contact urging member when moved to the locking position. The accessory device according to claim 1, wherein the contact pin is urged. An accessory device that is detachably attached to the imaging device,
A movable member movable to a first position for fixing the accessory device to the mounted imaging device and to a second position for releasing the fixing of the accessory device to the mounted imaging device;
A contact member that contacts an electrical contact provided in the mounted imaging device;
In response to the movement to said first position from said second position of said moving member, have a, a biasing mechanism to increase the force in the direction of projection of said contact member,
The accessory device according to claim 1, wherein a tip of the contact member protrudes and is exposed regardless of a position of the moving member .