JPS6014474B2 - Method for manufacturing electrical connection members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention can be used, for example, in a liquid crystal display device, etc., as a connector for connecting a liquid crystal display element and a printed wiring board on which connection terminals are formed, or as a movable contact mechanism of a keyboard switch. The purpose of the electrical connection member is to ensure electrical connection and to simplify the manufacturing process.

In general, connectors for counterfeiting liquid crystal displays have a large number of conductor strips made of guide fin material embedded in a polymeric material (elastomer) in the thickness direction, but manufacturing is required to embed such conductor strips. It has the drawbacks of being difficult and expensive.

The present invention ensures the connection state of the connection member and improves the manufacturing process thereof, and embodiments thereof will be described in detail below with reference to the drawings. FIG. 1 shows a base part 3 made of a highly oriented polymeric material such as polyethylene terephthalate, in which a fibrous conductor strip 2 such as carbon fiber is embedded in the longitudinal direction approximately in the center of the thickness of the base part 3. The largest flat plate-shaped molded body 1 is formed by extruding the molded body 1 so as to be hardened and rapidly cooling it. The base portion 3 of the molded body 1 is rapidly cooled, so that crystallization accompanying solidification does not proceed, and is maintained in an almost amorphous state. Therefore, first, the molded body 1 is cut (sliced) in a direction perpendicular to its length into a large number of thin plates 4.
After that, the thin plate 4 is subjected to heat treatment at a temperature suitable for the high partitioning material used to form the base portion 3, for example, in the case of polyethylene terephthalate, at a temperature of about 120 qo for about 6 pi minutes. As the crystallization of the polymer material constituting the base portion 3 progresses, the volume decreases, resulting in a shape as shown in FIG. 4. At this time, the conductor strip 2 shrinks not only in the thickness t but also in the length L and width directions, but by designing the dimensions in advance with the shrinkage rate in mind, the conductor strip 2 after shrinkage... - Adjust the mutual spacing (pitch) to the desired design value. On the other hand, carbon fiber etc. do not shorten in length, so as shown in the figure, the conductor strip 2
The end faces 2a, 2a of the connector 6 are in a state of protruding from the end faces 5, 5 of the base portion 3, and the connector 6 is completed. FIG. 5 is a perspective view thereof. FIG. 6 shows a liquid crystal display device using the connector 6 according to the present invention, in which terminals 8 of the liquid crystal display element 7 and terminals 10 of the printed wiring board 9 are shown.
The connector 6 is sandwiched between the terminals 8, . . . , and the terminals 8, .
...and conduction is ensured.

In addition, in the example, it is preferable that the end surface of the protruding conductor strip is easily parallel to the end surface of the base portion of the polymer material, and the direction in which the electrical connection member is cut (sliced) as a single electrical connection member is parallel to the extrusion direction of the polymer material. Although the present invention is not limited to that case, the cutting direction may be set at right angles as long as the end shape of the protruding conductor strip is permissible in relation to the connection point (contact point) of the other party. Of course, the direction can be selected to be perpendicular to the extrusion direction of the polymeric material.

As mentioned above, in the present invention, a conductor strip is embedded in an oriented polymeric material, and after extrusion molding is performed so as to harden in a quenched state, the molded body is extruded in a direction perpendicular to the extrusion direction, preferably at a right angle. The conductor strip is cut into thin plates in the direction of the substrate and heat-treated to disturb the orientation of the molecules of the polymer material and shrink the thickness of the base, thereby making the end surfaces of the conductor strips protrude.For example, it is used in liquid crystal display devices. When used as an electrical connection member such as a connector for a commercial vehicle, the contact is reliable, the manufacturing process is extremely simple, and the manufacturing cost can be reduced.

FIG. 7 and the following are other embodiments of the present invention, which are similar to the manufacturing process of the connector described above, but in this embodiment,
This shows the manufacturing process of a connecting member in which the conductor strips 2 are arranged at large intervals and arranged in one row or in multiple rows as required, and are suitable for the movable contact plate 6 of a keyboard switch, etc. It's tamo.

[Brief explanation of drawings]

The drawings all relate to the present invention; FIG. 1 is a side view of a molded body in an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a partially sectional side view of a thin plate, and FIG. 4 is a completed product. FIG. 5 is a perspective view thereof, FIG. 6 is a sectional view showing its usage state, and FIGS. 7 to 11 relate to other embodiments, and FIG. 8 is a side view of the molded body, FIG. 8 is a sectional view thereof, FIG. 9 is a partially broken side view of the thin plate, FIG. 10 is a side view of the contact plate, and FIG. 11 is a front view thereof. 1. ．． ．． ．． ．． - Molded object, 2... Conductor strip, 2a,
2a... End face of conductor strip, 3... Base part, 4... Thin plate, 5, 5... End face of base part, 6, 6'. ...Electrical connection member. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] 1. A step of extrusion molding in which a conductor strip is embedded in the length direction inside a base portion made of an oriented polymeric material and hardening is performed in a quenched state, and an electrical connection member comprising the steps of: cutting the thin plate into a thin plate in a direction such that manufacturing method.