JPH0348634B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] This is a connector for a flexible printed board, in which a slit is provided at the tip of the contact and the flexible printed board is connected to the inner surface of the slit in connection between the contact and the flexible printed board. , connection can be made easily and reliably.

[Industrial application field]

The present invention relates to a connector for connecting flexible printed boards on which wiring patterns are formed, and particularly to a contact portion for connecting flexible printed boards.

[Conventional technology]

FIG. 5 shows a side sectional view of a conventional connector for a flexible printed board, and FIGS. 6a and 6b show the vicinity of the connecting portion between the flexible printed board and the contacts in FIG. 5.

In the conventional connector, as shown in FIG. 6a, the end of a flexible printed board 3' on which solder 6' has been attached in advance is brought into contact with the side surface of a rod-shaped contact 2' embedded in an insulator 1'. Heat is applied from the opposite side of contact 2' in the direction of arrow A', and the solder 6' is melted by the heat transmitted through contact 2' and soldered.
Thereafter, as shown in FIG. 6b, the insulator cover 4' is fitted onto the insulator 1' so as to deform the flexible printed board 3'. The purpose of deforming the flexible printed board 3' is to increase the tensile strength.

The connector completed in this way is shown in Figure 5, in which the insulator 1' and the insulator cover 4' extend in a direction perpendicular to the plane of the paper, and the contacts 2' also extend in the same direction. Multiple pieces are installed in parallel. The plurality of contacts 2' are integrated through connecting portions at the stage of insertion into the insulator 1', and after the insulator 1' is inserted, the connecting portions are cut to separate them into individual contacts. This cutting generates a burr 2c' at the cut part, and when the flexible printed board 3' is connected and the insulator cover 4' is fitted, the flexible printed board 3' comes into contact with the burr 2c' of the contact 2', and the flexible printed board 3' comes into contact with the burr 2c' of the contact 2'. This will damage the pattern on the plate 3'.

Therefore, an insulator protrusion 1 that protrudes upward from the contact 2' is formed between the plurality of contacts 2'.
a' is formed integrally with the insulator 1', so that even if the flexible printed board 3' is deformed by fitting the insulator cover 4', the burr 2c' of the contact 2' can be overcome without contacting the insulator cover 4'. Become.

[Problems to be solved by the present invention]

With the above conventional connector, first, the width of the contacts is wide during the heating process for soldering, and there is also a lot of heat escaping downward as shown by arrow A'' in Figure 6a, making it difficult to connect flexible printed boards. It is difficult for heat to be transferred to the contacts, so it takes time to connect them.Also, since insulator protrusions are formed between multiple contacts that are arranged in parallel, this gets in the way and makes it impossible to visually check the soldering condition.

Then, as shown in FIG. 6b, the flexible printed board 3' deforms when the insulator cover 4 is fitted.
Due to its own rigidity, a force is applied that tries to return to its original shape. That is, since the connection between the flexible printed board and the contact was bent in the direction of peeling, poor contact often occurred.

The present invention aims to solve these problems.

[Means for solving problems]

In order to solve the above problems, the present invention provides an insulator in which a contact is inserted and fixed, a flexible printed board connected to one end of the contact exposed from the insulator, and a flexible printed board connected to the insulator. and an insulator cover that fits onto the insulator so that the contact is bent along the surface of the contact, and the contact is provided with a slit that opens toward the tip on the connection side of the flexible printed board. To provide a connector for a flexible printed board, characterized in that the flexible printed board is inserted into the slit and soldered to the inner surface to which a force due to rigidity is applied, thereby connecting the contact and the flexible printed board. .

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 4 are diagrams showing an embodiment of the connector according to the present invention, with Figure 1 being a side sectional view, and Figures 2a and 2b explaining the process of connecting the flexible printed board and the contacts. FIG. 3 is an exploded perspective view with the flexible printed board omitted, and FIG. 4 is a diagram showing the fitted state of the insulator and the insulator cover.

In these figures, 1 is an insulator, 2 is a contact, 3 is a flexible printed board (hereinafter referred to as FPC), 4 is an insulator cover, 5 is a slit opening at the upper end of the contact 2, and 6 is solder.

First, the structure of this embodiment will be explained with reference to FIG.

Insulator 1 has contact 2 in the hole that passes through the top and bottom.
is planted so that its upper end is exposed.
The exposed upper end of this contact 2 has an FPC 3
A slit 5 into which the contact 2 is inserted is provided at an offset position with respect to the width direction of the contact 2, and divides the contact 2 into two parts 2a and 2b. The FPC 3 is inserted into the slit 5 and connected to the 2a portion of the contact 2 by soldering. The other end of the contact 2 serves as a contact portion 2c with a mating connector. Further, an insulator cover 4 is fitted to the insulator 1 to protect the FPC connection portion. The insulator cover 4 has an approximately U-shaped inner wall, and the FPC 3 is sandwiched between the contact 2 and the insulator 1.
FPC3 is deformed so as to be bent. By bending the FPC 3 in this way, the tensile strength of the FPC 3 is increased.

Next, the process of connecting the FPC 3 and the contacts 2 will be explained with reference to FIGS. 2a and 2b.

Before fitting the insulator cover 4, the FPC 3 is inserted into the slit 5 opened at the upper end of the contact 2 implanted in the insulator using a guide (not shown).
At this time, the FPC 3 is held so as to be in contact with the 2a side of the contact 2, as shown in FIG. 2a. In this state, heating is performed as shown by arrow A, and the solder 6 is melted by the heat transmitted through the portion 2a, thereby establishing the connection. The 2a portion of the contact 2 is provided so as to be thin, and the root portion thereof is also thin, so that less heat escapes downward, and the heating time is short, and the contact 2 and the insulator 1 are not affected.

After connecting the FPC 3, fit the insulator cover 4 to the insulator 1 as shown in figure b. The fitting means will be explained later. By this fitting, the FPC 3 is bent to follow the shape of the inner wall of the insulator cover 4 and is pulled out from a part between the insulator 1 and the insulator cover 4. The bent FPC 3 is subjected to a force trying to return to its original shape due to its own rigidity, but in the soldered portion, the force is applied to the 2a side of the contact 2, so the possibility of peeling is extremely small.

Next, the fitting between the insulator 1 and the insulator cover 4 is performed in the third step.
This will be explained with reference to the drawings and FIG.

The insulator 1 is provided with a through hole 1b at both ends thereof, and fitting protrusions 1c and 1d are provided on the side and front sides of both ends. Fitting portion 4a and insulator 1
A fitting portion 4b that fits into the fitting protrusion 1d is provided. These are then brought together to fit together, but since the fitting protrusions 1c and 1d of the insulator 1 have a shape that slopes from the upper part to the middle part thereof, the fitting is carried out smoothly. FIG. 4 shows the fitted state.

It should be noted that a plurality of contacts 2 arranged in parallel are integrated through a connecting part from 2b at the stage of insertion into the insulator 1, and are cut after insertion, but as in the conventional case, burrs 2d shown in FIG. 1 are generated when cutting. . This Bali 2
In order to prevent interference with the FPC 3 due to
It is located only between the 2b part of contact 2 where
Since it is not formed between the parts 2a, the soldering state between the FPC 3 and the contacts 2 can be visually confirmed.

〔effect〕

According to the connector of the present invention, the process of connecting the FPC and the contacts is easy, the connection time can be shortened, and the connected state is more reliable, so that the possibility of peeling is extremely reduced.

[Brief explanation of drawings]

Figures 1 to 4 are diagrams for explaining an embodiment of the connector according to the present invention. Figure 1 is a side sectional view, and Figures 2a and 2b illustrate the process of connecting the flexible printed board and the contacts. FIG. 3 is an exploded perspective view with a flexible printed board omitted, and FIG. 4 is a perspective view showing a fitted state of an insulator and an insulator cover. Further, FIG. 5 is a side sectional view showing a conventional connector, and FIG. 6 is a sectional view of main parts for explaining the connection between a conventional flexible printed board and a contact. [Explanation of symbols] 1...Insulator, 2...Contact, 3...Flexible printed board (FPC), 4...Insulator cover, 5...Slit for inserting flexible printed board, 6...Solder.

Claims (1)

[Claims] 1. An insulator 1 into which a contact 2 is inserted and fixed, and the contact 2 exposed from the insulator 1.
Flexible printed board 3 connected to one end of
and an insulator cover 4 that fits onto the insulator 1 so that the flexible printed board 3 to be connected is bent along the surface of the contact 2. A slit 5 opening toward the tip is provided on the connection side, and the flexible printed board 3 is inserted into the slit 5 and soldered to the inner surface to which force due to rigidity is applied, thereby forming the contact 2.
A connector for a flexible printed board, comprising: and a flexible printed board 3 connected to each other. 2. The connector for a flexible printed board according to claim 1, wherein the slit 5 of the contact 2 is provided at an offset position with respect to the width direction of the contact 2.