JPS59155186A - Flexible circuit connection board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible wiring connection board, and particularly to a wiring connection board suitable for circuit connection on a flexible printed circuit board.

In general, flexible printed circuit boards are made by laminating metal foil such as copper on the surface of a flexible substrate such as Plus Deck film.
Metal foil is processed by etching or other methods to form a circuit pattern (circuit conductor), and various parts such as IC1 resistors are soldered to the surface to create a flexible electric circuit board or multiple printed circuits. Connect boards to each other.

By the way, when connecting a circuit such as the flexible printed circuit board (hereinafter referred to as a circuit board) to a device or other circuit board, a multi-connector is used and insulated wires for wiring, tape wires, etc. are used to connect each other. However, since there are a wide variety of circuits, it is necessary to position the conductors on the connector side in advance in accordance with these circuits.

Furthermore, if you want to make a branch connection to a part of the circuit network on the printed circuit board or change the circuit, it becomes even more difficult to select the conductor on the connector side. There is a problem.

The present invention was made in view of these circumstances, and its purpose is to simplify the electrical connection between printed circuit boards, facilitate branch connections and circuit changes, and prevent the occurrence of wiring errors. It is an object of the present invention to provide a flexible wiring connection board that prevents the above problems and improves workability, and increases the possibility of automating circuit connections.

In order to achieve this object, the present invention provides a first circuit board and a second circuit board each having a plurality of solder-plated circuit conductors attached in parallel to one side of a heat-resistant base film. While the circuit conductors are arranged facing each other in a perpendicular state, a spacer plate is interposed to separate both circuit conductors, a through hole is provided in the spacer plate corresponding to the intersection position of both circuit conductors, and the through hole is formed with molten solder. The feature is that the intersection points of both circuit conductors are connected via.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The part indicated by reference numeral 1 in FIG. 1 is a flexible wiring connection board according to the present invention, and its both ends are connected to the terminals of the instantaneous objects and circuit boards 2A and 2B to be connected via connectors 3A and 3B. It is used by As shown in FIGS. 2 and 3, this flexible wiring connection board (hereinafter abbreviated as connection board) 1 has a first circuit board 4 and a second circuit board 4.
A spacer 6 for connecting the name plates 4 and 5 is interposed between the circuit board 5 and the name plates 4 and 5, and the name plates 4 and 5 are bonded together.

These first and second circuit boards 4 and 5 have a plurality of circuit conductors 4b and 5b arranged facing each other on one side of base films 4a and 5a made of a heat-resistant material such as polyimide.
are pasted in parallel, and these circuit conductors 4b and
Solder plating Jit4c/5C is provided on the surface of 5b. The circuit conductor 4b of the first circuit board 4 is connected to both the connectors 3A and
3B, and the circuit conductors 5b of the second circuit board 5 are inclined at 45 degrees with respect to the direction of connection with the second circuit board 5 and are arranged facing each other at right angles to each other. (see figure).

Further, the spacer plate 6 is provided with a large number of through holes 6a in a matrix shape so that the circuit conductors 4b and 5b face each other with a gap between them at the crossing position.

The connection plate 1 constructed in this manner is heated in a spot-like manner at the intersection of the circuit conductors 4b and 5b while being pressed in the thickness direction, as shown by the arrows in FIG. The solder plating layers 4C and 5C of 5b are melted and flowed into the through hole 6a, so that both circuit conductors 4b and 5b are electrically connected by the molten solder 7 (see FIG. 2).

Therefore, the orthogonal circuit conductors 4b and 5b of the connection board 1 can be connected in any combination, and as a result, branch connections from the circuit, changes in the circuit, short circuits, etc. can be freely performed.

For example, in the circuit conductor 4b in the range shown in FIG.
When selecting and connecting the circuit conductors 5b in the range shown in (b), conduct in the thickness direction at intersection points (c), (d), (e), (f), etc. to form connection points. Just do it.

Similarly, the circuit conductor 4b in the range shown in Fig. 1 (G) and (H)
・When connecting 5b to each other, you can freely use the through hole 6a of the spacer plate 6. Also, when disconnecting a circuit that is once in a conductive state, connect the through hole 6a at the intersection. This can be done by drilling a new hole of larger diameter and removing the connection point.

In addition, as shown in FIG. 1 (S) and (N), the circuit board 2A
If there are spare circuit conductors 4b and 5b that are not connected to 2B, they can be used for parallel connection of the circuit conductors 5b of the second circuit board 5, reconnection of a disconnected circuit, etc. Further, the spacer plate 6 may have lower heat resistance than the base films 4a, 5a because the depth of the through holes 6a becomes smaller due to heating and softening, making it easier for the circuit conductors 4b, 5b to conduct.

As explained above, according to the present invention, the connection plate itself is made of plastic film, which allows connection at the required locations in a small space while maintaining flexibility, and enables spot heating. You can branch, change, short-circuit, etc. the circuit as you like and freely with a simple pressing method.
Furthermore, since the intersection positions are arranged in a matrix, there is an advantage that it is possible to introduce a computer and automatically connect.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a plan view showing the overall structure of the connecting plate, Fig. 2 is an enlarged sectional view of the part indicated by the chain line ■ in Fig. FIG. 1...Flexible wiring connection board, 4...
・First circuit board, 4a...Base film, 4
b...Circuit conductor, 4C...Solder plating layer, 5...Second circuit board, 5a...
Base film, 5b...Circuit conductor, 5C...
... Solder plating layer, 6 ... Spacer plate,
6a... Through hole, 7... Molten solder. Applicant: Fujikura Electric Wire Co., Ltd.

Claims (1)

[Claims] A plurality of circuit conductors (4b) (5b) plated with solder on one side of the heat-resistant base film (4a) (5a)
) are attached in a substantially parallel state, and a first circuit board (4) and a second circuit board (5) are arranged facing each other with both circuit conductors perpendicular to each other. A dividing spacer plate (6) is interposed, and the spacer plate is provided with a through hole (6a) at the intersection of both circuit conductors to connect the first and second circuit conductors with solder that melts during heating. A flexible wiring connection board characterized by: