JPH0126053Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flat cable connecting device that can stably and reliably connect a flat cable to a printed wiring board.

As is well known, in order to electrically connect multiple terminals on a printed wiring board or between multiple printed wiring boards,
A flat cable is used in which multiple leads are arranged in parallel and integrated. The connection between the flat cable and the printed wiring board is conventionally made by using a plurality of (five in the illustrated case) leads 12, .
2 are inserted through a plurality of through holes (not shown) formed in the printed wiring board 13, and the leads 12,...,1
2 is soldered 14 to a conductive pattern (not shown) of a printed wiring board 13.

By the way, with the conventional flat cable connection means as described above, the flat cable 11 may be connected in a state that is slightly raised from the printed wiring board 13, as shown in FIG. 1b. There are many. In this case, for example, the printed wiring board 13
When the flat cable 11 is bent when it is installed in a device cabinet etc., stress is concentrated on the raised parts of the leads 12,..., 12, and the first
If the leads 12,..., 12 are cut as shown in Figure c, or if the flat cable 1 is cut as shown in Figure d,
There are problems such as 1 coming off from one side. Also, the leads 12,...,1 of the flat cable 11
2 is protruded for a considerable length (for example, 5 mm) to prevent it from coming out undesirably after the solder 14 is attached. Therefore, even if the flat cable 11 is properly connected to the printed wiring board 13 as shown in FIG.
There is an inconvenience that comrades 2,..., 12 come into contact with each other.

Therefore, in the past, the connecting portion of the flat cable 11 to the printed wiring board 13 was reinforced by separately providing a reinforcing member to prevent the leads 12, . . . , 12 from coming off or rising from the printed wiring board 13. However, all of these methods result in complicated configurations, difficult assembly operations, and increased costs, and do not fully meet the needs of users.

This idea was made in consideration of the above circumstances, and it has a simple structure and is easy to assemble, as well as an extremely good flat cable that can connect the flat cable to the printed wiring board stably and reliably. The purpose is to provide a connection device.

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings. That is, as shown in FIG. 2, holders 15, 15 are attached to both ends of the flat cable 11 in the width direction, respectively.
As shown in FIG. 3a, this holder 15 is made of, for example, a metal plate formed into a substantially T-shape and bent vertically into a substantially U-shape. Surface portions 151 and 152 of this holder 15 that face each other
constitutes a substantially U-shaped clamping portion 153 that clamps the end portion of the flat cable 11 in the width direction, and a substantially U-shaped clamping portion 153 that clamps the flat cable 11 is provided at approximately the center of each surface portion 151, 152. In this state, locking portions 154 and 155 are formed that bite into the insulator 111 covering the leads 12, . . . , 12 of the flat cable 11. And the locking portions 154, 155
For example, each of the surface portions 151 and 152 is cut out approximately at the center thereof in a substantially dogleg shape so that the tip points downward in the figure, and the cut tongue portions are bent slightly inward from each other. This is what happens.

Further, the portion extending downward in FIG. 3a from the clamping part 153 of the holder 15 is extended in the width direction of the flat cable 11 by the clamping part 153 of the holder 15, as shown in FIG. 3b. The legs 156 are formed into a cylindrical shape so as to cover the periphery of the lead 12 at the end of the flat cable 11 in the width direction, with the end portions being held in place.

Lead 1 of the flat cable 11
2,..., 12 are inserted into the through holes 131,..., 131 of the printed wiring board 13 as shown in FIG. The lead 12 at the end portion is inserted into the through hole 131 of the printed wiring board 13 through which the lead 12 at the end portion is inserted.

Therefore, according to the configuration of the above embodiment, the leads 12 at both ends of the flat cable 11 in the width direction are protected by the legs 156 of the holder 15, so that when the flat cable 11 is bent, , it is possible to easily prevent stress from concentrating on the parts of the leads 12, ..., 12 that protrude from the insulator 111 and cause wire breakage, thereby stably and reliably connecting the flat cable 11 to the printed wiring board 13. It is something that can be done. Also, holder 15
The leg portions 156 are inserted together with the leads 12 into the through holes 131 of the printed wiring board 13 through which the leads 12 are inserted, so that the work of positioning and inserting the leads 12 into the through holes 131 can be facilitated. , which facilitates assembly work. Furthermore, the holder 15 itself can be formed by simply cutting out and bending a metal plate, and each of the locking parts 154, 1
55 can also be easily formed by die cutting, so it is extremely easy to manufacture and economically advantageous, and has a high yield and is suitable for mass production.
Furthermore, since one holder 15, 15 is provided at each end of the flat cable 11 in the width direction, even if the width of the flat cable 11 changes,
The same holder 15 can be used, which has a great practical effect.

Furthermore, since the holders 15, 15 are integrated with the flat cable 11 while being attached to it, handling becomes convenient.

As shown in FIG. 5, a locking portion 157 having the same structure as the locking portions 154 and 155 is formed on the leg portion 156 of the holder 15, and the leg portion 156 is connected to the through hole 131 of the printed wiring board 13. It may be configured such that it is prevented from coming off when it is inserted into the holder.

In this way, the flat cable 11 is held by the holder 15 so that it does not float up from the printed wiring board 13, so the lengths of the leads 12, ..., 12 protruding from the flat cable 11 can be shortened ( For example, about 3 [mm]), lead 12,
..., 12 comrades can also be prevented from coming into contact with each other.

In each of the above embodiments, the holder 15 is made of a metallic material, but it may also be made of a synthetic resin material, for example.

It should be noted that this invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist of the invention.

Therefore, as detailed above, this invention provides an extremely good flat cable that has a simple configuration and is easy to assemble, and also allows stable and reliable connection of the flat cable to the printed wiring board. A cable connection device can be provided.

[Brief explanation of the drawing]

FIGS. 1A to 1E are side views for explaining a conventional flat cable connection device, and FIGS. 2 to 4 each illustrate an embodiment of the flat cable connection device according to this invention. FIG. 5 is a configuration diagram for explaining another embodiment of this invention. 11...Flat cable, 12...Lead,
13...Printed wiring board, 14...Solder, 15...Holder.

Claims (1)

[Scope of utility model registration request] In a flat cable connection device that connects a plurality of leads protruding from the ends of a flat cable by passing them through a plurality of through holes formed in a printed wiring board, each lead is connected to each end of the flat cable in the width direction. They are attached and integrated with the flat cable, and each includes a substantially U-shaped clamping part that clamps one end of the flat cable in the width direction, and a clamping part extending in the direction in which the lead protrudes from the clamping part. The leg part extends to surround the lead at the end in the width direction of the flat cable and is inserted into the through hole of the printed wiring board through which the lead at the end is inserted together with the lead at the end. A flat cable connection device characterized by comprising a pair of holders.