JPH0594978U - Flat circuit body connection structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a structure in which a flexible flat circuit body can be connected to a junction block or the like with one touch. A terminal 7 having a curved contact portion 6 inclined toward the substrate on a substrate 4, and a bending guide 1 along the curved contact portion.
1 and a curved protrusion 13 for warping the flexible flat circuit body 12 having a circuit portion 17 in contact with the curved contact portion, and an engagement portion 15 for the curved protrusion is provided in the flat circuit body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for connecting a flexible flat circuit body to a junction block or the like.

[0002]

[Prior Art]

 FIG. 6 shows a connection structure of a wire harness in a conventional junction block. The wire harness 21 is made by winding a plurality of electric wires together in a vinyl winding, and various switches 23 are connected to a connector part 25 of a junction block 24 via a branch line 22. The connector portion 25 is to obtain electrical connection by joining a male tab terminal and a female terminal (not shown).

However, in the above structure, the wire harness 21 and the connector connecting portion 25 are enlarged because the electric wire 22 must be connected even in a small current circuit for driving a relay or the like. There was a drawback of inviting.

Therefore, in order to simplify the wire harness 21, it is desirable to use an FPC (flexible printed circuit) which is a flat circuit body for the small current circuit, and it is necessary to provide the junction block 24 with an FPC connection function. It was FIG. 7 shows a conventional FPC connection structure described in Japanese Utility Model Publication No. 1-179383.

In this structure, a junction block 26 is provided with an opening 27 for inserting a connector, and a groove frame 28 for holding an FPC is provided on the upper inside of the junction block 26, and an FPC 29 is closely adhered to the groove frame 28. The slide block 30 is fitted. A male connector 31 is inserted into the opening 27, and its spring terminal 32 contacts the exposed conductor 33 of the FPC 29 to be electrically connected.

However, in the above-mentioned conventional connection structure, it is necessary to assemble the FPC 29 to the slide block 30 one by one, and it takes time and effort to assemble the slide block 30 into the junction block 26, which makes the assembly work difficult. there were. Further, there is a drawback that the connector block 34 becomes large due to the presence of the slide block 30.

[0007]

[Problems to be solved by the device]

 In view of the above points, the present invention not only solves the enlargement of the wire harness and the junction block connecting portion, but also provides a structure capable of easily connecting a flat circuit body in the junction block. And

[0008]

[Means for Solving the Problems]

 In view of the above points, the present invention may include a terminal having a curved contact portion inclined toward the substrate, a curved guide along the curved contact portion, and a circuit portion in contact with the curved contact portion. A structure is provided in which a curved protrusion for bending back to the flexible flat circuit body is provided, and an engaging portion for the curved protrusion is provided in the flat circuit body.

[0009]

[Action]

 The flat circuit body is inserted between the curved guide and the curved contact portion. The flat circuit body bends in the direction of the board along the curved guide, and further passes over the curved projecting portion on the board to lock the engaging portion to the projecting portion by a restoring force. Part to be in electrical contact.

[0010]

【Example】

 FIG. 1 shows an embodiment of a flat circuit body connection structure according to the present invention. In this structure, the connector 1 is provided so as to project above the resin case 3 of the junction block 2, and a flat substrate 4 integral with the case 3 is provided with a frame-shaped housing portion 5 for inserting a flat circuit body. In addition, a plurality of terminals 7 having the curved contact portions 6 are provided so as to project in parallel.

As shown in FIG. 2, the terminal 7 is formed by standing up from one side of a bus bar 9 arranged on a circuit board 8 in the block 2 and coupling the curved contact portion 6 with the flat portion. It inclines downward toward the base plate 4. A plurality of circuit boards 8 are superposed, and the lower terminal 7 projects from the insertion hole 10 of the upper circuit board 8.

As for the shape of the terminal 7, as shown in FIG. 3, the bus bar 9 may be folded back in the longitudinal direction as it is to form a curved contact portion 6 ′ having a wide contact surface. A curved guide 11 having a shape along the curved contact portion 6 is formed on the inner surface of the upper wall of the housing portion 5 surrounding the terminal 7, and the curved guide 11 is inserted between the curved guide 11 and the curved contact portion 6. The flexible flat circuit body 12 can be bent downward toward the substrate 4.

The board 4 is further provided with curved projecting portions 13 each having a curved surface 13a for bending back with respect to the insertion direction of the circuit body, and a pair of curved projecting portions 13 is provided inwardly of the rear of the projecting portions 13. A locking pin 14 is provided so as to project. The flat circuit body 14 has engaging notches 15 for the curved protrusions 13 on both sides, and an engaging hole 16 for the locking pin 14 at the front end.

FIGS. 4A to 4D show a state in which the flat circuit body 12 is connected to the connector 1. That is, as shown in (a) and (b), the circuit body 12 inserted in the housing portion 5 is bent downward along the bending guide 11. Next, as shown in (c), the tip of the circuit body 12 is slid upward along the curved surface 13a of the curved protruding portion 13 and warped back. By further continuing the insertion, the engaging notch 15 of the circuit body 12 and the engaging hole 16 of the circuit body 12 to the projecting portion 13 and the locking pin 14, respectively, are the restoring force of the circuit body 12 (force in the direction of arrow a). Are engaged and securely fixed. At the same time, the printed circuit portion 17 (FIG. 1) of the circuit body 12 comes into contact with the curved contact portion 6 of the terminal 7 to make an electrical connection.

It should be noted that, in the above-described embodiment, the locking pin 14 can be replaced with another clamping means or the like, and the curved projection 13 or the like is directly provided on the circuit board 8 without using the flat board 4. It is also possible.

FIG. 5 shows a state in which various switches 18 are connected to the junction block 2 by a connector, and the connector 1 is capable of one-touch connection with the flat circuit body 12 and has a slim structure. Further, since there is no connection by a bundled electric wire as in the conventional case, it is possible to prevent the wire harness main line portion 19 from being enlarged.

[0017]

[Effect of the device]

 As described above, according to the present invention, since the flexible flat circuit body can be connected and locked accurately with one touch, the assembling and connecting workability is remarkably improved. Furthermore, since the conventional bundled wires and slide block are not used, the wire harness main line part and the junction block connection part (connector part) are made compact, and it is possible to save space in a vehicle or the like.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a flat circuit body connecting structure according to the present invention.

FIG. 2 is an exploded perspective view showing a connector portion of the same.

FIG. 3 is a perspective view showing a similar example of a terminal.

4 (a) to 4 (d) are cross-sectional views corresponding to AA in FIG. 1 showing the state of connecting the flat circuit body to the connector in order.

FIG. 5 is an external perspective view showing a junction block connection structure.

FIG. 6 is an external perspective view showing a conventional junction block connection structure.

FIG. 7 is an exploded perspective view showing a connection structure of a conventional flat circuit body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector 4 Flat board 6 Curved contact part 7 Terminal 11 Curved guide 12 Flat circuit body 13 Curved protrusion 15 Engagement notch 17 Circuit part

Claims (1)

[Scope of utility model registration request] 1. A flexible flat circuit body having a terminal having a curved contact portion inclined toward the substrate, a curved guide along the curved contact portion, and a circuit portion in contact with the curved contact portion on a substrate. A flat circuit body connection structure, comprising: a curved protrusion for bending back; and an engaging portion for the curved protrusion provided on the flat circuit body.