JPH04171786A - Flexible wiring board cable - Google Patents

Abstract

PURPOSE:To improve workability and prevent a cable from being broken by forming an opposite circuit pattern a through a removed part from the neighborhoods of terminal parts of the circuit pattern. CONSTITUTION:A copper foil is bonded onto an insulating plastic film, and a circuit pattern 6 is formed by etching. Then, the pattern 6 is coated with a polymer film excepting terminal parts 5, and bridge 3 are formed from the neighborhoods of the terminal parts 5 to an opposing film. Further, blanking is performed along the pattern 6, and a portion other than the patterns 6 and the bridges 3 are removed. The flexible wiring board cables 1 are joined through the bridges 3 in the state that they are connected with each other and the terminal parts 5 and the pattern part 6 are integrally fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible wiring board cable that bendably connects electronic components of equipment, a method of manufacturing the same, and a method of connecting the same.

[Prior art] Flexible printed circuit board cable (hereinafter referred to as FPC)
In this method, a circuit pattern is formed on a polyimide film or the like, parts other than the circuit pattern are removed from the board, and a connector is attached to the terminal part of the circuit pattern by terminal treatment.

This FPC takes advantage of its characteristics of flexibility and strength,
It is used for connections between circuit boards in devices and for connections with other FPCs.

By the way, since the material itself of the above-mentioned FPC is expensive, for example, even if an FPC with a length a is required, as shown in FIG. The circuit pattern 11 is formed by reciprocating as shown in Figure (a), and this FPC is used as an FPC of length a by bending and wiring as shown in Figure (b). In this way, the FPC minimizes waste on the substrate 10 to improve material yield and keep costs down.

For this reason, for example, a device that connects a large number of circuit boards in a device has a complicated shape with a plurality of terminal portions 5 as shown in FIG.

[Problem to be solved by the invention]

However, in the above shown in FIG.
Due to its thin and flexible properties, each terminal section 5 and circuit pattern section 6 move loosely during terminal processing or joint processing, which becomes a nuisance and impairs workability.

Further, at this time, there is a high risk that the FPC 3 may be broken due to the terminal section 5 being hooked on the terminal processing device, or an accompanying disconnection accident may occur.

Furthermore, when transporting a large number of FPCIs that have undergone the above processing to be mounted on equipment, other FPCIs or their own terminal units 5 may become entangled within the transport box. For this reason, FP
When taking out Cl from the box, it has to be disentangled and taken out, resulting in poor workability.

Therefore, an object of the present invention is to solve the above problem by preventing each terminal section from freely moving around.

[Means for Solving the Problems and Their Effects] In order to achieve the above object, in the present invention, circuit patterns connecting electronic components of a device are formed close to each other on an insulating film, In the flexible wiring board cable from which parts other than the circuit pattern of the film are removed,
A bridge is formed near the terminal portion of the circuit pattern, and the bridge extends to the opposing film via the removed portion.

In the flexible wiring board cable constructed in this way, the terminal portions are joined to the film by a bridge, and each terminal portion is fixed so as not to come apart.

At this time, even if connectors are provided at the terminals, each connector will not come apart.

On the other hand, the above-mentioned flexopull wiring board cable has circuit patterns that connect electronic components of a device formed close to each other on an insulating film, and a circuit pattern that extends from the vicinity of the terminal portion of the circuit pattern to the circuit pattern opposite to the vicinity thereof. After forming the bridge leading to the terminal and removing the circuit pattern and the portions of the film other than the bridge, a connector can be installed or manufactured at the terminal portion.

In addition, the flexible wiring board cable is connected by cutting the bridge of the flexible wiring board cable and connecting the connector to the corresponding connector of the device.

〔Example〕

FPCl shown in Fig. 1 is made by gluing copper foil onto an insulating plastic film such as polyimide and etching it to create the required circuit pattern 6 for connecting electronic components of the device.
form. This pattern 6 is coated with a polymer film except for the terminal part 5, and as shown in the figure, a bridge 3 is applied from the vicinity of the terminal part 5 to the film facing this vicinity.
is formed, and die cutting is performed along the pattern 6 to remove portions other than the pattern 6 and the bridge 3 from the substrate. Therefore, the FPCls are connected to each other by each bridge 3, and each terminal part 5 and circuit pattern part 6 are fixed as one piece without coming apart, and each terminal part 5 and circuit pattern part 6 cannot move around freely.

The shape and width of the bridge 3 may be any shape.For example, in addition to the rectangular shape shown in FIG. In order to improve workability, we made it easier to cut as a guide, and also made a notch in the bridge 3 as shown in the same figure (fc) so that it could be separated by hand without using cutting tools such as nippers. It can also be used as a thing.

In this FPCi, a terminal processing device (not shown) performs terminal processing for connecting a connector to each terminal portion 5 while being joined by the bridge 3. At this time, the terminal section 5 of FPCl
Also, since the circuit pattern section 6 does not move around freely, workability is improved, and it is less likely to get caught in the terminal processing device, thus reducing the possibility of disconnection accidents. In this way, a large number of FPCIs that have completed terminal processing are placed in a transportation box with the bridge 3 left in place and transported near the equipment in which the FPCI is mounted. Cut and separate, and connect the connector of each terminal part 5 to the connector of the corresponding device. For this reason, the FP during transportation
C1s are less likely to get entangled with each other, making it easier to take them out of the box and increasing the efficiency of wiring work.

Note that the above bonding portion can also be used in a flexible wiring board on which electronic components are mounted. In that case, it can be used, for example, to temporarily fasten the main conductor pattern and a dedicated conductor pattern that is connected to an electronic component placed separately from this pattern, eliminating movement of each pattern during component mounting or board mounting. You can also measure time efficiency.

〔effect〕

Since the present invention is configured as described above, it is possible to prevent each terminal from moving freely during terminal processing or transportation.

Therefore, it is possible to improve the efficiency of the above-mentioned work, and at the same time, it is possible to reduce the occurrence of breakage accidents of the flexible wiring board cable and to prevent the accompanying breakage accidents.

[Brief explanation of the drawing]

Figures 1 and 3 show an embodiment of the flexible wiring board cable according to this invention, with Figure 1 being a plan view and Figure 2 being a plan view.
Figures (a) and (c) are action explanatory diagrams of the conventional example, and Figure 3 (a).
), (b), and (C) are enlarged views of main parts showing other embodiments of the joint, and FIG. 4 is a plan view showing a conventional example. 6...Circuit pattern, 1...Flexible wiring board cable, same
Agent Sickle 1) Sentence 2 Figure q Arrogance

Claims (4)

[Claims] (1) In a flexible wiring board cable in which circuit patterns connecting electronic components of a device are formed close to each other on an insulating film, and portions of the film other than the circuit patterns are removed, near the terminal portion of the circuit pattern. A flexible wiring board cable, characterized in that a bridge is formed in the cable, and the bridge extends to the opposing film via the removed portion. (2) The flexible wiring board cable according to claim (1), wherein a connector is provided at a terminal portion of the circuit pattern. (3) Form circuit patterns that connect electronic components of a device on an insulating film in close proximity to each other, and form a bridge extending from the vicinity of the terminal portion of the circuit pattern to the circuit pattern opposite to the vicinity; 1. A method for manufacturing a flexible wiring board cable, comprising: removing a portion of the film other than the circuit pattern and the bridge, and then providing a connector at the terminal portion. (4) A method for connecting a flexible wiring board cable, which comprises cutting the bridge of the flexible wiring board cable according to claim (2) and connecting the connector to a corresponding connector of a device.