JPS6227510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a connection terminal for a receiver having a folded piece for connection with a flat-blade insertion connection terminal, and in particular has a resistance force against the prying force of the insertion connection terminal. It concerns a certain connection terminal.

In a connection terminal having a folded piece, it is necessary to use a thick metal plate in order to increase the elastic pressing force exerted by the movable contact piece made of the folded piece.
However, this movable contact piece with increased rigidity often breaks due to fatigue due to repeated prying force of the insertion connection terminal, or becomes permanently deformed and loses its elastic pressing force, resulting in poor contact. The useful life of terminals tends to be short.

In order to compensate for the above-mentioned drawbacks, for example,
A connection terminal has been proposed in which a reinforcing spring with free ends facing the same direction is superimposed on the underside of a movable contact piece, such as the connection terminal described in Publication No. 70487.
In this type of connection terminal, the length of the movable contact piece is large and effective elastic force cannot be obtained.
The elastic force needs to be borne by the reinforcing springs that overlap on the outside, and there is a drawback that the advantage of stacking two layers, that is, the advantage of dispersing the elastic force, cannot be fully utilized.

The object of the present invention is to effectively disperse the required elastic force, and to provide a strong pressing force to the insertion connection terminal.
The purpose is to provide a long-life connecting terminal that is resistant to the prying force of a push-in connecting terminal, and its gist is that a single conductive metal plate is bent to form an approximately box-shaped connecting portion. , a fixed contact part provided on the upper surface of the connecting part, a movable contact piece having spring properties, which has a strip extending forward from the front end of the bottom plate of the connecting part and is folded back into the connecting part to face the fixed contact part, and a connecting part. The movable reinforcing piece is lifted from a part of the bottom plate of the movable contact piece and extended forward, and has a tip portion overlapped with the lower surface of the free end of the movable contact piece.

The present invention will be explained in detail based on illustrated embodiments.

1 to 4 show a connecting terminal 1 according to a first embodiment of the present invention, which is formed from a single conductive metal plate by punching and bending. The connection terminal 1 has a connection part 2 and a wire crimping part 3, and the wire crimping part 3 has a normal core wire crimping part 4 and a covering crimping part 5 each formed in a U-shape. The connecting part 2 is formed into a box shape by bending a metal plate, and includes fixed contact pieces 6 and 7 formed by bending both ends of the box-shaped abutting part inward, and a strip-like part extending from the front end of the bottom plate 8. It has a movable contact piece 9 extending forward. The front ends of the fixed contact pieces 6, 7 are curved portions 10, which serve as guide portions for the insertion and connection terminals. The movable contact piece 9 is folded back inward from the bending part 11 to form a contact part 13 between the slope part 12 and the insertion connection terminal, and the contact part 13 has a spring property so as to face the fixed contact pieces 6 and 7. It is placed with a Furthermore, a movable reinforcing piece 14 having spring properties is formed by punching out a portion of the bottom plate 8 and lifted forward, and its tip is overlapped below the contact portion 13 of the movable contact piece 9.

In use, this connection terminal 1 is accommodated in the housing of the connector. The insertion connection terminals (not shown) are connected to the curved surface portions 10 of the fixed contact pieces 6 and 7 and the movable contact piece 9.
The movable contact piece 9 is inserted between the fixed contact pieces 6, 7 and the contact portion 13 of the movable contact piece 9. The movable contact piece 9 and the movable reinforcing piece 14 are elastically deformed, and the insertion connection terminal is strongly pressed against the fixed contact pieces 6 and 7 by the spring force, so that conductive contact is obtained.

In the present invention, by providing the movable reinforcing piece 14, the elastic pressing force against the insertion connection terminal becomes the sum of the spring forces of the movable contact piece 9 and the movable reinforcing piece 14. Therefore, in order to obtain the required elastic force, the spring force that must be generated in each of them becomes a small value, and it becomes possible to easily manufacture even small-sized connection terminals. Also, compared to the connection terminal described in the above-mentioned Japanese Utility Model Publication No. 49-70487, the free ends of the contact piece and reinforcing spring of this conventional example face in the same direction, so the inner contact piece Although it is necessary to make the length of the movable contact piece 9 longer than the outer reinforcing spring, since the movable contact piece 9 and the movable reinforcing piece 14 face in opposite directions in the connection terminal according to the present invention, the length of the movable contact piece 9 can be shortened. It is possible to do this. If the length of the movable contact piece 9 can be shortened in this way, the rigidity of the movable contact piece 9 will increase, the resistance force against the prying force of the insertion connection terminal will increase, and the design will be able to obtain the required elastic force. becomes easier,
It also saves materials. As the movable contact piece 9 is shortened, the contact point with the insertion connection terminal becomes closer to the front end, and the length of the insertion connection terminal can also be shortened. Furthermore, in the conventional example, the radius of curvature of the folded portion of the contact piece must be made small, but in the connecting terminal according to the present invention, since the directions of the movable contact piece 9 and the movable reinforcing piece 14 are opposite, the radius of curvature of the folded portion of the contact piece must be made small. The radius of curvature can be increased, and the spring force can be applied effectively.

4 and 5 show a second embodiment in which reinforcing ribs 15 and 16 are formed over the entire longitudinal length of the movable contact piece 9 and the movable reinforcing piece 14, respectively. Further, other parts are the same as those in the previous embodiment, and the same reference numerals indicate the same parts.

The operation in this embodiment is the same as in the previous embodiment, but by providing the reinforcing ribs 15 and 16, the rigidity of the movable contact piece 9 and the movable reinforcing piece 14 is increased, and the same elastic pressing force can be obtained. This makes it possible to use thinner conductive metal plates.

In addition, in the above-mentioned embodiment, the movable contact piece 9
Although the fixed contact pieces 6 and 7 are formed to face each other, the fixed contact pieces 6 and 7 do not have to be provided in a direction perpendicular to the upper surface, but may be flat fixed contact parts.

As explained above, the connection terminal according to the present invention is
The strength of the movable contact piece is increased by forming the movable contact piece and the movable reinforcing piece from separate fulcrums of the bottom plate portion, forming overlapping springs in use;
It has the advantage that it has sufficient resistance against the prying force of the insertion connection terminal, can be manufactured from a thinner conductive metal plate with a smaller area than conventional ones, and is extremely durable.

[Brief explanation of the drawing]

The drawings show an embodiment of the connection terminal according to the present invention,
Fig. 1 is a longitudinal cross-sectional view, Fig. 2 is a partially cutaway plan view, Fig. 3 is a front view, Fig. 4 is a partially cutaway bottom view, and Fig. 5 is a longitudinal cross-section of another embodiment. Front view, No. 6
The figure is a partially cutaway front view. 1 is a connection terminal, 2 is a connection part, 3 is a wire crimping part, 6 and 7 are fixed contact pieces, 8 is a bottom plate, 9 is a movable contact piece, 10 is a curved part, 11 is a bent part, 12 is a slope part, 13 is a contact portion, and 14 is a movable reinforcing piece.

Claims (1)

[Scope of Claims] 1. A substantially box-shaped connection part is formed by bending a single conductive metal plate, and includes a fixed contact part provided on the top surface of the connection part, and a fixed contact part provided on the top surface of the connection part, and extending forward from the front end of the bottom plate of the connection part. A movable contact piece having spring properties, which is made by folding back the existing strip into the connecting part and facing the fixed contact part; and a movable contact piece having a spring property, which is lifted from a part of the bottom plate of the connecting part and extended forward, and the tip part is the free end of the movable contact piece. A connecting terminal comprising a movable reinforcing piece having spring properties superimposed on the lower surface of the connecting terminal. 2. The connection terminal according to claim 1, wherein the fixed contact portion is a fixed contact portion bent at right angles inward of the connection portion. 3. The connection terminal according to claim 1, wherein the movable contact piece and the movable reinforcing piece have reinforcing ribs extending substantially over their entire longitudinal length.