JPH11144530A - Flexible wiring body and its connecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable connecting structure and a satisfactory finish by preferentially connecting a conductor exposed part formed on one edge to a counter conductor, and then connecting the remaining part while absorbing a slippage in position by a slit. SOLUTION: Slits 15 are formed on one edge of the other film (base film 12) of each flexible wiring body 10, 11 so as to be opened across at a right angle to the one edge. The number of the slits 15 formed is properly set/changed according to the form of a conductor exposed part 13A. The slit 15 can be easily formed by forming a slit in a predetermined position by an XY plotter used in the manufacture of the flexible wiring bodies 10, 11. In the connection of both the flexible wiring bodies 10, 11, the parts having the conductor exposed parts 13A formed thereon (parts A) of the both are mutually stuck, and the remaining parts (parts B) are mutually connected while absorbing a slippage in position by the slits 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible wiring body and a joining method thereof, and more particularly, to a flexible wiring body used for internal wiring of OA equipment, home electric appliances, automobiles and the like, and a joining method thereof.

[0002]

2. Description of the Related Art A flexible wiring body is a general term for a flexible flat cable and a flexible printed circuit. After forming a substantially linear conductor on a base film, a conductor pattern is formed. It is formed by bonding a coverlay film on this conductor pattern.

[0003] As an example of use of such a flexible wiring body, a part of a conductor constituting a conductive pattern is exposed from one edge of the flexible wiring body, and the exposed conductor (referred to as a "conductor exposed part") is exposed. Bonding to the corresponding conductor is performed. In particular, in the case of large ones used for amusement equipment, etc., the flexible wiring body is molded into several pieces,
By connecting one end edge of each piece with an anisotropic conductive film or the like, the conductor exposed portions of both flexible wiring bodies are electrically connected to each other.

[0004]

When the flexible wiring bodies are joined as described above, the conductor exposed portions formed on the individual flexible wiring bodies are precisely positioned with respect to the other conductor to be joined. It is necessary to prevent short-circuiting with other conductors and poor connection.

[0005] However, in combination with the fact that the material of the flexible wiring body employs an insulating film (base film or cover lay film) which is difficult to obtain dimensional accuracy, the one edge to be joined is of a relatively long size. Tends to be displaced in the longitudinal direction. When such a displacement occurs, the conductor exposed portion of each flexible wiring body is difficult to match with the conductor of the other party,
There has been a problem that the joining operation is hindered, and that the flexible wiring body becomes wrinkled after the joining, resulting in a poor finish.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables a conductor exposed portion formed at one end edge to be joined to a conductor at the other end with high accuracy, thereby providing a highly reliable joint structure. It is an object of the present invention to provide a flexible wiring body capable of obtaining a good finish and a bonding method thereof.

[0007]

In order to solve the above-mentioned problems, the present invention comprises a pair of insulating films, and a conductor laminated between the two insulating films to form a conductive pattern. In the flexible wiring body which exposes a part of the conductor at the edge to form a conductor exposed portion for bonding, a slit is formed at the one end edge so as to expand and contract its longitudinal dimension. Flexible wiring body.

In the invention including the specific matter, when the flexible wiring body in which the exposed conductor is formed at one end is electrically and mechanically joined to the other conductor, the flexible wiring body is formed at the one end. With the slit thus formed, the conductor can be joined to the other conductor while absorbing the displacement. Here, the conductor on the other side may be a conductor of a flexible wiring body, or may be formed on another wiring board. Furthermore, when the conductor on the other side is a conductor of a flexible wiring body, it is preferable that the flexible wiring body includes a slit according to the above-described specific matter.

In the embodiment of the present invention, the conductor exposed portion formed on the one end edge is preferentially joined to the conductor on the other side, and then the remaining portion is joined while absorbing the displacement by the slit. Is preferred. In that case, the flexible wiring body can be easily connected, and the finish is good.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described in detail. FIG. 1 shows a flexible wiring body 10 according to an embodiment of the present invention.
2 is a schematic cross-sectional view showing a joining process of the flexible wiring body 10 of FIG.

Referring to these drawings, the illustrated embodiment shows an example in which two piece-shaped flexible wiring bodies 10 and 11 are joined. Each of the flexible wiring bodies 10 and 11 is a base film 1 made of resin.
A conductor 13 for forming a predetermined conductive pattern is wired on the substrate 2 and covered with a coverlay film 14 also made of resin, thereby forming an integrated laminate. Then, one end edge of one of the base film 12 and the cover lay film 14 is cut off (or by shortening one dimension), and the conductor 1 wired to the other end edge is cut off.
By exposing a part of 3, a conductor exposed portion 13 </ b> A for bonding is formed.

Here, each of the flexible wiring bodies 10, 11
(The base film 12 in the illustrated example)
Is formed at one end edge thereof to open at a right angle to the one end edge. As shown in FIG. 1, the slit 15 has a predetermined width, and the enlarged diameter portion 15 </ b> A is formed at the bottom thereof so that the longitudinal dimension of the other film can be expanded and contracted to some extent. Has become.

The number of slits 15 formed is as follows.
It is appropriately set / changed depending on the form of the conductor exposed portion 13A. Further, the slit 15 is formed in the flexible wiring body 1.
By forming cuts at predetermined positions using an XY plotter used when manufacturing 0 and 11, it can be easily created. When joining both flexible wiring bodies 10 and 11, first of all, the conductor exposed portion 13A
2 are aligned with each other, and only those portions are preferentially bonded by a hot press or the like. (The part indicated by B in FIG. 2).

In the configuration described above, as shown in FIG. 2, when the flexible wiring bodies 10 and 11 are joined, the conductor exposed portion 13A formed on one flexible wiring body 10 (11) is connected to the other. Even if the position shifts, the slit 15 can absorb the position shift in the longitudinal direction of the one end edge, so that the pitch accuracy can be precisely maintained with respect to the counterpart conductor exposed portion 13A. it can.

As a result, in the above-described embodiment, the exposed conductor 13A formed at one end of the flexible wiring bodies 10 and 11 can be joined to the exposed conductor 13A of the mating member with high precision. This has a remarkable effect that a highly reliable bonding structure and a good finish can be obtained. The above-described embodiment is merely an example of a preferred specific example of the present invention, and the present invention is not limited to the above-described embodiment.

For example, when two flexible wiring bodies 10 and 11 are joined as in the above-described embodiment,
The embodiment can be implemented even when the slit 15 is formed only in one flexible wiring body. Further, the conductor on the other side to which the flexible wiring body is bonded may be a bonding portion of a wiring member other than the flexible wiring body. It goes without saying that various design changes are possible within the scope of the claims of the present invention.

[0017]

As described above, according to the present invention, in electrically and mechanically joining a flexible wiring body having an exposed conductor for joining at one end edge to a conductor of the other party, The slit formed at the one end allows the conductor to be joined to the conductor at the other end in a state where the displacement has been absorbed, so that the conductor exposed part formed at the one end of the flexible wiring body is exposed to the conductor at the other end. This has a remarkable effect that a highly reliable bonding structure and a good finish can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a schematic configuration of a flexible wiring body according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a joining process of the flexible wiring body of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Flexible wiring body 11 Flexible wiring body 12 Base film 13 Conductor 13A Conductor exposed part 14 Coverlay film

Claims (2)

[Claims] An insulating film, comprising: a pair of insulating films; and a conductor laminated between the two insulating films to form a conductive pattern. A part of the conductor is exposed at one edge of the insulating film to form a conductive material for bonding. A flexible wiring body constituting a body-exposed portion, wherein a slit is formed at one end edge of the flexible wiring body so that its longitudinal dimension can be expanded and contracted. 2. A method of joining a flexible wiring body according to claim 1, wherein the exposed conductor portion formed at the one end edge is preferentially joined to the other conductor, A method for joining a flexible wiring body, comprising joining a remaining portion while absorbing a displacement by a slit.