JPH0410582Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial field of application This invention is an exchange method for electrically connecting the electrical element on the interchangeable lens side and the electrical element on the camera body side when the interchangeable lens is attached to the camera body. This invention relates to a movable contact connector for lenses.

B. Prior Art This type of movable contact connector is used, for example, as an electrical connection between a camera having an automatic focus detection device and an interchangeable lens, and is used for exchanging information between the camera and the interchangeable lens. Two types of movable contact connectors are known, one in which the contacts are movable by a compression coil spring, and the other in which the contacts are movable by a plate spring. 8 and 9 show a conventional example of a compression coil spring type, and 40 indicates an interchangeable lens, and a connector body 51 fixed to the inner surface of the lens mount 50 is composed of a holding member body 51a and a holding lid 51b. A plurality of cylindrical chambers 52 extending radially from the lens optical axis X are defined between the holding member body 51a and the holding lid 51b. and,
A contact pin 53 is inserted into the cylindrical chamber 52, and a contact point 53a at the head thereof is projected from the connector body 51 by a spring 54. A drawer contact piece 55 is held between the spring 54 and the bottom of the cylindrical chamber 52, and the drawer contact piece 55 is connected to an electrical element on the interchangeable lens side (for example, a circuit such as an integrated circuit storing lens information or a zoom encoder). ) are connected by soldering.

On the other hand, FIG. 10 shows a conventional example of a plate spring type, in which a connector main body 61 provided on the inner surface of a lens mount 60 of an interchangeable lens 40 consists of an upper cover 610 and a lower cover 611. A plurality of contact members 63 are housed in parallel in the optical axis direction in the housing section 62 defined between the two. The contact member 63 consists of a main body 63a having a spring property and a contact 63b protruding from the main body, and the contact 63b protrudes from a plurality of contact holes 610a formed in the upper cover 610 by the spring force of the main body 63a. . The end portion of the main body 63a is folded back to form a mounting portion 6 on the upper cover 610.
10b and is attached to the upper cover 610 in a sandwiched manner. The mounting portion 610b includes an upper fixing member 64 and a lower fixing member 65 that are screwed together.
At the same time, a circuit board 66 connected to the lens side electric element is sandwiched and fixed between the lower fixing member 65 and the main body 63a.

C. Problems to be solved by the invention However, in the above case, space is required to accommodate the compression coil spring, so in addition to the connector body becoming larger in the radial direction of the optical axis, the coil spring 54 and the circuit board and lead There is a problem in that a lead-out contact piece 55 is required to connect the wire 56, and furthermore, a soldering operation is required to connect the lead-out contact piece 55 and the lead wire 56 or the circuit board.

Although this problem is solved by the leaf spring type movable contact connector shown in FIG. 10, the leaf spring type movable contact connector has the following problems. That is, in addition to the connector main body 61, an upper fixing member 64 and a lower fixing member 65 are required to fix the circuit board 66 connected to the electrical element and the contact member 63, and the number of parts is large. There's just that much extra space.

Further, the circuit board 66 is connected to the connector body by sewing holes drilled between or in the members so as not to interfere with the operation of the members in the interchangeable lens in order to connect with the electrical elements disposed within the interchangeable lens. 6
Connected to 1. When connecting the connector main body 61 to this board 66 after placing this circuit board 66 inside the interchangeable lens, as described above, the circuit board 66 should be installed to the minimum necessary so as not to interfere with the operation of the members inside the interchangeable lens. Since the connector main body 61 is formed to have a length of , it becomes extremely difficult to attach the connector main body 61 to the circuit board 66. In addition, this circuit board 6
When the circuit board 66 and the connector body 61 are connected to each other and then assembled into an interchangeable lens, the circuit board 66 and the connector body 61 are fitted with holes drilled between or in the members so as not to interfere with the operation of the members in the interchangeable lens. Although it is assembled to the lens mount 60 through the lens mount 60, the assembly workability is poor.

The purpose of this invention is to solve these problems and
To provide a movable contact connector for an interchangeable lens, which allows easy electrical connection to a circuit board after parts related to the circuit board are assembled into the interchangeable lens.

D. Means for solving the problem In order to achieve this purpose, the present invention:
The connector body 10 consists of at least first and second members 11 and 12, and the contact member 20 consists of a substantially U-shaped body 21 having spring properties and a contact 22 protruding from the body. Part 1 of
1 and 12, an opening 16 into which a circuit board 30 connected to an electrical element on the interchangeable lens side is inserted;
A accommodating portion 15 is formed in which a substantially U-shaped main body 21 of the contact member 20 is accommodated, and at least one of the first and second members 11 and 12 is provided with the contact member 20.
A hole 11a through which the contacts 22 protrude outward from the connector body 10, and a retaining portion 12b that prevents the circuit board 30 from coming out from the connector body 10 after the circuit board 30 is inserted into the opening 16 are formed. When the circuit board 30 is inserted between the substantially U-shaped main body 21 of the contact member 20 and the first or second member 11, 12, the circuit board is locked by the retaining portion 12b and the substantially U-shaped main body 21 of the contact member 20 is inserted. The main body 21 is clamped to the connector main body 10 by the elastic repulsion force, and is electrically connected to the contact member 20 .

E Example Figures 1 to 7 show an example of the present invention.
00 is a movable contact connector, which has a connector body 10 consisting of an upper cover 11 constituting a first member and a lower cover 12 constituting a second member, and a contact member 20, and has an interchangeable lens 200. It is fixed to the inner peripheral surface of the mount 201.

As shown in FIGS. 2 and 3, the upper cover 11 has an arcuate shape with a predetermined curvature centered on the optical axis, and is provided with a plurality of through holes 11a from which contact points 22, which will be described later, are projected. The inner circumferential surface has a plurality of grooves 1 each connected to the through hole 11a.
1b extends in the optical axis direction.

As shown in FIG. 2, the lower cover 12 has an arcuate shape with a predetermined curvature centered on the optical axis, and its outer peripheral surface is recessed to a depth corresponding to the depth of the groove 11b of the upper cover 11. A protrusion 12b for preventing the flexible printed circuit board (hereinafter referred to as a circuit board) constituting an electric circuit board from coming off is provided on the bottom 12a, and a protrusion 12b for ultrasonically welding the upper cover 11 and the lower cover 12 together. A protrusion 12c is provided.

As shown in FIG. 2, the contact member 20 includes a substantially U-shaped main body 21 having spring properties and a folded portion 21a, and a contact 22 integrally protruding from the main body 21 at the other end. Become. The tip of the folded portion 21a is formed in a V-shape, and that portion becomes a contact point 21b with a circuit board, which will be described later.

To assemble these three parts, top cover 1
The contact member 20 is accommodated in each groove 11b of the contact member 1, and the inner circumferential surface of the upper cover 11 is covered with the lower cover 12. Next, the projections 12c are melted by ultrasonic waves, and the upper cover 11 and the lower cover 12 are welded and integrated, thereby forming the movable contact connector 100.

Here, as shown in FIG. 1, when the upper cover 11 and the lower cover 12 are integrated, a space 15 that constitutes a housing part is formed in the groove part 11b, and each contact member 20 is placed in the space 15. It will be accommodated. That is, the contact member 20 is accommodated in the space 15 against the elastic repulsion force, and the contact 22 protrudes from the through hole 11a of the upper cover 11, and the contact 21b contacts the bottom 12 of the outer peripheral surface of the lower cover 12.
It will be pressed by a. An opening 1 through which a space 15 communicates with the outside is provided at the mating surface of the upper cover 11 and the lower cover 12 at one end of the connector body 10, that is, the end on the inside side of the interchangeable lens.
6 (see FIGS. 1, 5 and 7) is formed. FIG. 4 is a view of the thus assembled movable contact connector 100 seen from the mount 201 side of the interchangeable lens 200, and FIG. 5 is a view seen from the front side of the interchangeable lens 200.

Here, as shown in FIG. 6, the interchangeable lens 20
A locking ear 31 is provided on the circuit board 30 connected to the electrical element on the 0 side, and a locking hole 3 is provided in the ear 31.
Leave 1a and 31b open. Then, when the circuit board 30 is inserted into the space 15 of the connector body 10 through the opening 16 from the ear 31, the locking holes 31a and 31b of the ear 31 lock the lower cover 12, as shown in FIG. The circuit board 3 is locked by the protrusion 12b.
This will prevent the 0 from falling out. Further, as shown in FIG. 1, a conductive pattern (not shown) provided in advance on the circuit board 30 comes into contact with the contact 21b on the folded part 21a side of the contact member 20 with a predetermined contact pressure, and the interchangeable lens 2
00 (for example, an integrated circuit that stores lens information such as the aperture F-number, focal length, and lens aberration, and a zoom encoder that indicates the focal length of the zoom lens) via the circuit board 30. can be electrically connected to the contact member 20 of the movable contact connector 100.

Furthermore, the movable contact connector 100 formed in this manner is screwed onto the inner circumferential surface of the mount of the interchangeable lens using the screws 11b of the upper cover 11 and the screws 12b of the lower cover 12. And 20 interchangeable lenses
0 is the electrical contact provided on the camera body side that is attached to the camera body and the contact 22 of the movable contact connector 100
contact with each other with a predetermined contact pressure, and as a result, the electric element on the interchangeable lens 200 side (for example, lens information, etc.) and the electric element on the camera body side (for example, automatic focus detection device, etc.) connect to the movable contact connector 100. It will be electrically connected via the

F. Effects of the invention The invention comprises a connector main body made up of a first member and a second member, and a circuit in which a through hole from which a contact protrudes and an electrical element on the interchangeable lens side are connected between the two members. A housing part is defined which communicates with the outside through an opening into which the board can be inserted, and a substantially U-shaped contact member functioning as a leaf spring is housed in the housing part, and the contact is activated by the elastic repulsive force of the contact member. A circuit board that protrudes from the through hole and is inserted through the opening is sandwiched between the contact member and the connector body by the elastic repulsive force of the contact member, and the circuit board is locked in a retaining part provided in the housing part. This design simplifies the configuration by eliminating the need to clamp and secure the circuit board and contact member between separate members, as was the case in the past. The circuit board and the movable contact connector can be connected after being installed inside, improving assembly efficiency.

[Brief explanation of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a cross-sectional view taken in a plane containing the optical axis of the interchangeable lens, FIG. 2 is an exploded perspective view of a movable contact connector,
Fig. 3 is a perspective view showing the inner peripheral surface of the upper cover, Fig. 4 is a view of the movable contact connector as seen from the mounting surface of the interchangeable lens, and Fig. 5 is a diagram of the movable contact connector as seen from inside the interchangeable lens. , Fig. 6 is a plan view showing the insertion part of the circuit board into the movable contact connector, Fig. 7 is a cross-sectional view showing the state in which the circuit board is locked in the retaining part of the movable contact connector, and Fig. 8 is the conventional one. 9 is a right side view thereof, and FIG. 10 is a sectional view showing a conventional leaf spring type movable contact connector. 10...Connector body, 11...Top cover, 1
2... Lower cover, 20... Contact member, 21... Main body, 22... Contact, 30... Circuit board, 31...
Ear, 100...Movable contact connector.

Claims (1)

[Claim for Utility Model Registration] It has a connector body provided on the interchangeable lens and a contact member provided on the connector body, and when the interchangeable lens is attached, the electrical element on the interchangeable lens side and the electrical element on the camera body side are connected. In the movable contact connector for an interchangeable lens that is electrically connected via the contact member, the connector main body has at least first and second contacts.
The contact member includes a substantially U-shaped main body having spring properties and a contact protruding from the main body, and the contact member is connected to an electrical element on the interchangeable lens side between the first and second members. an opening into which a printed circuit board is inserted, and a housing into which a main body of the contact member is housed; at least one of the first and second members;
A hole portion through which the contact of the contact member projects outward from the connector body, and a retaining portion for preventing the circuit board from coming off from the connector body after the circuit board is inserted into the opening are formed; When the circuit board is inserted between the substantially U-shaped main body of the contact member and the first or second member, the circuit board is locked by the retaining portion and the substantially U-shaped main body A movable contact connector for an interchangeable lens, characterized in that the movable contact connector for an interchangeable lens is clamped to the connector body by elastic repulsive force and is electrically connected to the contact member.