JP2008033044A - Camera mounting structure - Google Patents

Abstract

Contact pins are held with a simple configuration, and a main board and contact pins are securely connected.
A body-side mount portion includes a mount ring member, bayonet claws, a mount body, a barrier member, and a coil spring. The mount body 53 holds the contact pin 31 by fixing the fixing member 63 a to the base member 61, and presses the contact pin 31 to the relay substrate 65 by fixing the relay substrate 65 to the base member 61. By connecting the relay board 65 to the main board 77 via the FPC 76, the contact pins 31 and the main board 77 are electrically connected.
[Selection] Figure 6

Description

  The present invention relates to a camera mounting structure.

  2. Description of the Related Art In recent years, digital cameras that convert a captured image captured using an image sensor such as a CCD into digital image data and record it on a recording medium such as a built-in memory or a memory card have become widespread. Among digital cameras, there are an integrated type in which a photographing lens is integrated with a camera body, and an interchangeable lens type in which various photographing lenses are detachably attached to the camera body. In the case of an interchangeable lens digital camera, in order to transfer data between the lens unit and the camera body, an electrical signal contact is provided on each mount part. When the lens unit is mounted on the camera body, Generally, the configuration is such that electrical signal contacts are brought into contact and data transfer is performed via these electrical signal contacts.

  By the way, when the electrical signal contacts as described above are provided on the camera body, for example, as described in Patent Documents 1 to 3, it is necessary to dispose a plurality of contacts on the inner side of the mount portion, and further, the lens unit. The periphery of the mount portion is complicated, such as a member that securely holds the lens unit and a member that locks the lens unit mounted on the mount portion so as not to move.

Further, in the conventional mount structure, as shown in FIG. 10, a mount portion 100 including a bayonet claw 101, a mount body 102, a plurality of contact pins 103 and the like is provided on the front side of the camera body 105. The main board 106 disposed inside is located on the back side of the mount unit 100, and the contact pins 103 incorporated in the mount unit 100 and the main board 106 are electrically and physically connected by direct soldering.
JP 2005-316437 A JP 2005-316438 A JP-A-2005-300567

  However, in the conventional mount structure as described above, since the contact pin 103 incorporated in the mount unit 100 and the main board 106 are directly soldered, it is difficult to disassemble after assembly. There was a problem in terms of maintenance. In addition, when trouble such as poor contact or physical damage occurs in the vicinity of the contact pin 103, the expensive main board 106 is affected, and all the components around the mount portion and the main board must be replaced. Furthermore, the electrical performance cannot be inspected unless all the parts around the mount and the main board are assembled. Moreover, in the structure of the mount part described in the said patent documents 1-3, since the structure of a contact and a main board periphery is not considered, since it is a complicated structure, its maintainability is also not good. .

  The present invention has been made in view of the above circumstances, and provides a low-cost camera mounting structure that can hold a contact pin with a simple configuration and can reliably connect the main board and the contact pin. For the purpose.

  In order to solve the above-described problems, a camera mount structure according to the present invention includes a lens unit and a mount portion to which the lens unit is detachably mounted, and the contact portion is provided on the mount portion through the contact pin. A lens body and a camera body that transmits and receives electrical signals, and the mount unit includes a coupling unit coupled to the lens unit, a base member fixed to the back side of the coupling unit, a plurality of the contact pins, In a camera mounting structure having a fixing member for fixing a contact pin to the base member and a main board to which the contact pin is connected, the relay board connected to the main board is provided, and the contact pin is A contact portion that contacts a contact of the lens unit is formed at one end portion, and a connection piece that protrudes from the base member is formed at the other end portion. The relay substrate by fixing the base member is characterized in that it is conductive electrically in pressure contact with the connecting piece.

  A lens unit; and a mount part to which the lens unit is detachably mounted, and a camera body that transmits and receives electrical signals to and from the lens unit through a contact pin provided on the mount part. The unit includes a coupling unit coupled to the lens unit, a base member fixed to the back side of the coupling unit, a plurality of the contact pins, a fixing member that fixes the contact pins to the base member, and the contact pins. The camera mounting structure having a main board to be connected includes a relay board to be connected to the main board, and the contact pin has a contact portion that contacts a contact of the lens unit at one end and the other end. A connecting piece projecting from the base member is formed on the portion, the relay board is fixed to the mount body, and the connection piece and the relay board are connected to each other. Sunda characterized in that it is electrically connected by attaching.

  The contact pin is preferably formed in a substantially Z-shape, and is preferably sandwiched and fixed between a pin holding portion formed on the base member and the relay substrate. The relay board and the main board are electrically connected by inserting a contact portion of a flexible flexible board provided on the relay board into a connector provided on the main board. It is preferable.

  According to the camera mount structure of the present invention, the contact pin is fixed to the base member by the fixing member, and the relay board connected to the main board is fixed to the base member, so that the contact piece of the contact pin is pressed against the relay board. Alternatively, since it is electrically connected by soldering, the contact pin can be held with a simple configuration, and the connection between the main board and the contact pin can be reliably performed. In addition, since the main board and the mount part are connected via the relay board, maintenance and inspection suitability are improved, and the cost can be reduced.

  In FIG. 1, a digital camera 10 to which the mount structure of the present invention is applied is a camera system including a camera body 11 and a lens unit 12, and the lens unit 12 is detachably attached to the camera body 11. The camera body 11 is provided with a body side mount portion 13, and the lens unit 12 is provided with a lens side mount portion 14.

  As shown in FIG. 2, the lens unit 12 includes a lens barrel portion 21 and a lens side mount portion 14, and the lens side mount portion 14 includes a mount body 22 fixed to the lens barrel portion 21, Bayonet claws 23 a to 23 c provided integrally with the mount body 22, a contact board 24, and a fixing plate 26 that fixes the contact board 24 to the mount body 22 are provided. The bayonet claws 23a to 23c are formed in positions and shapes according to the bayonet claws 30a to 30c of the body-side mount portion 13, and mesh with each other. Of the bayonet claws 23a to 23c, one bayonet claw 23a is integrally formed with a rotation restricting projection 23d at one end thereof. The rotation restricting protrusion 23d abuts on the bayonet claw 22a to restrict the rotation of the lens unit 12 and position it at a predetermined angle.

  The contact board 24 is formed in a similar shape and slightly smaller so as to be fitted into the bayonet claws 23a to 23c, and a plurality of contact patterns 27 are mounted thereon. The contact pattern 27 is provided at a position corresponding to a plurality of contact pins 31 (see FIGS. 3 to 5) provided on the body side mount portion 13, and when the lens unit 12 is attached to the camera body 11, The contact pin 31 and the contact pattern 27 are in contact with each other to be connected to each other, and an electric signal can be exchanged.

  The lens unit 12 is provided with a photographic lens 41, a CCD 42 as an imaging device, a processing circuit for forming image data based on an imaging signal acquired from the CCD 42, a control circuit for controlling each part of the lens unit 12, and the like. Built-in circuit board and the like. Subject light imaged on the CCD 42 through the photographing lens 41 is photoelectrically converted into an image signal by the CCD 42. Then, the image data formed by the signal processing circuit based on this imaging signal is transferred to the camera body 12 via the contact pattern 27 and the contact pin 31 and stored in the storage medium.

  Further, a strobe 43 is provided at the upper front of the camera body 11. Further, on the upper surface of the camera body 11, a shutter button 44 that is pressed when shooting and a switching dial 46 that is rotated when switching between the shooting mode and the playback mode are provided. Further, a power switch, an LCD, and the like are provided on the back of the camera body 11.

  As shown in FIGS. 3 and 4, the body-side mount portion 13 includes a ring-shaped mount ring member 51, three bayonet claws 30a to 30c formed integrally with the mount ring member 51, and a mount body. 53, a barrier member 54 movably provided between a closing position for closing the opening of the mount ring member 51, and a retracted position retracted from the closing position, and a coil spring for biasing the barrier member 54 to the closing position 56 and a lock mechanism 57. In FIG. 3, a state in which the barrier member 26 is retracted to the retracted position is illustrated in order to make it easy to represent the configuration of the mount portion 13. The mount ring member 51 is integrally fixed to the front cover (housing) 11a of the camera body 11 by screws or the like. The bayonet claws 30a to 30c are formed so as to protrude from the inner peripheral surface of the mount ring member 51 toward the center. In the present embodiment, the mount portions 13 and 14 are provided with three bayonet claws. However, the present invention is not limited to this, and the number of bayonet claws may be two or four.

  As shown in FIGS. 4 and 5, the mount body 53 includes a base member 61, contact pins 31, fixing members 63 a to 63 c, fixing screws 64, and a relay substrate 65. The base member 61 has a substantially cylindrical outer shape, a bottom wall 66 that closes the bottom surface side, pin holding portions 67a to 67c that project from the inner peripheral surface to the center, and a notch shape that penetrates from the outer peripheral surface to the inner peripheral surface. The fitting portions 68a to 68c and the boss 61a for screwing are integrally formed. In addition, the pin holding portions 67a to 67c are formed with a plurality of notches 69 that are respectively engaged with the contact pins 31 at the tips thereof. The notch portions 69 are arranged in an arc shape along the shape of the pin holding portions 67a to 67c. Furthermore, the fitting portions 68a to 68c are formed continuously from the back side of the pin holding portions 67a to 67c to the bottom wall 66, and engaging pins 70a and 70b are formed at both ends thereof. In FIG. 5, for convenience of explanation, only the fixing member 63b is removed from the fixing members 63a to 63c, and one of the contact pins 31 is not yet held.

  As shown in FIG. 5, the contact pin 31 includes a contact portion 31 a, a connection piece 31 b, and an intermediate portion 31 c that connects them, and is made of metal that is formed in a substantially Z shape. A cylindrical portion 31d is formed at the tip of the contact portion 31a. The connection piece 41b is formed such that its tip end extends in a direction away from the contact portion 31a. The contact pin 31 is formed such that the dimension A (see FIG. 5) from the contact portion 31a to the tip of the connection piece 31b is larger than the gap D between the pin holding portions 67a to 67c and the relay substrate 65.

  The fixing members 62a to 62c are formed in a substantially arc shape matching the outer peripheral surface of the base member 61, and a plurality of slits 71 and engaging portions 72 located at both ends are formed. The slit 71 is formed according to the width of the contact pin 31, and the intermediate part 31 c of the contact pin 31 is inserted. Further, when the intermediate portion 31c of the contact pin 31 is inserted into the slit 71, the connection piece 31b of the contact pin 31 protrudes to the back side. The engagement portion 72 has an engagement hole 72a. The fixing members 63a to 63c are fixed to the base member 61 by engaging the engaging holes 72a with the engaging pins 70a and 70b formed in the fitting portions 63a to 63c of the base member 61. The fixing of the fixing members 63a to 63c to the base member 61 is not limited to this, and may be fixed by screwing or bonding.

  The relay substrate 65 is a thin plate having rigidity, for example, a laminate of a metal plate and an FPC (flexible substrate), and a plurality of connection patterns 65a connected to the contact pins 31 are mounted thereon, and a plurality of screws A hole 65b is formed. The connection pattern 65a is arranged in an arc shape in accordance with the position of the contact pin 31. Further, the relay board 65 is provided with an FPC 76 as a flexible connection cable. A plurality of contact portions 76a are exposed at the front end of the FPC 76. By connecting the front end of the FPC 76 to a connector 77a provided on the main board 77 described later, the main board 77 and the relay board 65 are electrically connected. Connected. In this way, the contact resistance can be lowered by connecting the contact pin 31 and the main board 77 without providing the connector on the relay board 65, so that the electrical signal can be stably transferred. it can. Note that the FPC 76 may be formed integrally with the FPC constituting the relay board 65, or may be formed separately and connected to the relay board 65.

  In addition, a lock mechanism 57 is assembled to the relay board 65. The lock mechanism 57 includes a lock pin 79, a lock release button 80, a button holding member 81, and a push switch 82. The lock release button 80 is integrally provided via a connecting portion 80a so that the axial direction of the lock release button 79 is parallel to the lock pin 79, and is held movably along the axial direction with respect to the button holding member 81. . The button holding member 81 is fixed to the relay substrate 65. The lock pin 79 passes through the through hole 51a of the mount ring member 51, and is movable between a projecting position that projects from the mount ring member 51 and a retreat position that retreats inside the through hole 61a. A spring member (not shown) incorporated in the button holding member 81 is urged toward the protruding position together with the lock release button 80. As shown in FIGS. 1 and 3, the lock release button 80 is exposed near the mount ring member 51 and on the surface of the camera body 11. When the lens unit 12 is attached to the camera body 11, the lock pin 79 engages with an engagement hole 29 (see FIG. 2) formed on the back surface of the lens unit 12, and the rotation of the lens unit 12 is locked. The This prevents the lens unit 12 from rotating and falling off the camera body 11. The push switch 82 is located between the lock pin 79 and the lock release button 80 and is mounted on the relay board 65. The pressing switch 82 is composed of two contact pieces. When the lock pin 79 and the lock release button 80 are moved to the retracted position side, the press switch 82 is pressed by the protruding portion 80b formed on the connecting portion 80a. Touch. The lock release button 80 is operated when the lens unit 12 is removed. When the lens release unit 12 is pressed, the lock release button 80 moves to the retracted position together with the lock pin 79 against the bias of the spring to release the lock of the lens unit 12. can do. At this time, the contact piece of the pressing switch 82 is brought into a contact state, and a signal indicating that the lock of the lens unit 12 is released is detected.

  When assembling the mount body 53, first, the cylindrical portion 31d of the contact pin 31 is engaged with the notch portion 69 of the pin holding portions 67a to 67c, and the intermediate portion 31c is inserted into the slit 71 of the fixing members 62a to 62c. In the state, the fixing members 62 a to 62 c are fixed to the base member 61. As a result, the contact pin 31 is fixed to the base member 61. Then, the relay board 65 is fixed to the base member 61 by screwing the fixing screw 64 to the boss 61 a of the base member 61 through the screw hole 65 b of the relay board 65. As described above, since the dimension A from the contact portion 31a of the contact pin 31 to the tip of the connection piece 31b is formed larger than the gap D between the pin holding portions 67a to 67c and the relay substrate 65, the relay substrate 65 is formed. When fixed to the base member 61, the contact pin 31 is deformed by receiving pressure and is pinched and fixed between the pin holding portions 67 a to 67 c and the relay substrate 65. By fixing in this way, the connection piece 31b is pressed against the connection pattern 65b of the relay board 65 by the elastic force of the contact pin 31, and the contact pin 31 and the relay board 65 are electrically connected.

  The mount main body 53 assembled as described above is fixed to the position inside the camera body 11 and the back side of the mount ring member 51. A main board 77 is incorporated behind the mount body 53. As described above, the contact pins 31 are connected to the relay board 65, and the relay board 65 is connected to the main board 77, so that the contact pins 31 are electrically connected to the main board 31. Therefore, when the lens unit 12 is in the mounted state, the contact pattern 27 of the lens unit 12 and the contact pin 31 come into contact with each other so that the main board 77 and the lens unit 12 are electrically connected, and an electrical signal is exchanged. Can be done.

  The operation of the above configuration will be described. As described above, since the contact pin 31 and the main board 77 are connected via the relay board 65, the main board 77 can be easily removed by disconnecting the connection to the relay board 65, so that the disassembly work It is very easy and maintenance is improved. Further, even if a trouble such as breakage or failure occurs in the mount main body 53 including the contact pins 31 during the assembly work or the like, the main board 77 is not affected, so it is necessary to replace the expensive main board 77. Therefore, it is possible to prevent an increase in cost and improve the yield rate of parts. Further, since the mount main body 53 and the main board 77 can be assembled as separate units and these can be connected by the relay board 65, the electrical characteristics are required before assembling all the components around the mount main body 53 and the main board 77. Since this inspection can be performed and the inspection process can be facilitated, the cost can be reduced also in this respect. Furthermore, in this embodiment, since soldering is not used for the electrical connection of the contact pin 31, the relay board 65, and the main board 77, disassembly is easy, and recycling efficiency is high. Few.

  In the above embodiment, soldering is not used for the electrical connection between the relay board 65 and the contact pins 31. However, the present invention is not limited to this, and the relay board 65 and the contact pins 31 are soldered as shown in FIG. May be. Reference numeral 90 denotes a soldering portion in which the relay substrate 65 and the contact pins 31 are soldered. In this case, since the contact pin 31 does not need to be in pressure contact with the relay substrate 65, the contact pin 31 may be formed in a size that matches the gap D between the pin holding portion and the intermediate substrate 65. With such a configuration, the electrical connection between the contact pin 31 and the relay board 65 is reliably performed, and the connection between the contact pin 31 and the main board 77 is via the relay board 65. Similar to the embodiment, it is possible to improve maintenance and reduce the cost, and further, it is possible to obtain a configuration with high electrical reliability capable of stably transferring electrical signals.

It is a perspective view which shows the structure of a digital camera. It is a perspective view which shows the structure of the mount part periphery of a lens unit. It is a top view which shows the structure of the mount part of a camera body. It is a disassembled perspective view which shows the structure of a body side mount part. It is a disassembled perspective view which shows the structure of a mount main body. It is principal part sectional drawing of a body side mount part periphery. It is principal part sectional drawing of the body side mount part periphery to which 2nd Embodiment is applied. It is principal part sectional drawing of the conventional mount part periphery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Digital camera 11 Camera body 12 Lens unit 13 Body side mount part 30a-c Bayonet claw 31 Contact pin 53 Mount main body 61 Base member 63a-c Fixed member 65 Relay board 76 Flexible board 77 Main board

Claims (4)

A lens unit; and a mount part to which the lens unit is detachably mounted, and a camera body that transmits and receives electrical signals to and from the lens unit through a contact pin provided on the mount part. The unit includes a coupling unit coupled to the lens unit, a base member fixed to the back side of the coupling unit, a plurality of the contact pins, a fixing member that fixes the contact pins to the base member, and the contact pins. In the mount structure of the camera having a main board to be connected,
A relay board connected to the main board is provided, and the contact pin has a contact portion that contacts a contact of the lens unit at one end and a connection piece that protrudes from the base member at the other end. And mounting the relay board to the base member so that the relay board is brought into pressure contact with the connection piece and is electrically connected. A lens unit; and a mount part to which the lens unit is detachably mounted, and a camera body that transmits and receives electrical signals to and from the lens unit through a contact pin provided on the mount part. The unit includes a coupling unit coupled to the lens unit, a base member fixed to the back side of the coupling unit, a plurality of the contact pins, a fixing member that fixes the contact pins to the base member, and the contact pins. In the mount structure of the camera having a main board to be connected,
A relay board connected to the main board is provided, and the contact pin has a contact portion that contacts a contact of the lens unit at one end and a connection piece that protrudes from the base member at the other end. A mounting structure for a camera, wherein the relay board is fixed to the mount body and is electrically connected by soldering the connecting piece and the relay board.   3. The camera according to claim 1, wherein the contact pin is formed in a substantially Z shape, and is clamped and fixed between a pin holding portion formed on the base member and the relay substrate. Mounting structure.   The relay board and the main board are electrically connected by inserting a contact portion of a flexible flexible board provided on the relay board into a connector provided on the main board. The camera mount structure according to claim 1, wherein the camera mount structure is provided.

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