JPS6227511B2 - - 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.
This movable contact piece with increased rigidity often breaks due to fatigue or permanently deforms when subjected to repeated prying force from the insertion connection terminal, losing its elastic pressing force and causing poor contact. The useful life of terminals tends to be relatively short.

An object of the present invention is to improve the above-mentioned drawbacks, and to provide a connecting terminal that has a strong pressing force on the insertion connection terminal, has resistance to prying force by the insertion connection terminal, and has a long life. The gist is that a single conductive metal plate is bent to form a nearly box-shaped connection part, and a fixed contact part provided on the top surface of the connection part and a strip extending forward from the front end of the bottom plate of the connection part. A movable contact piece having a spring property that is folded back into the connecting part and facing the fixed contact part, and a double-sided elastic piece lifted up in an arc shape from the bottom plate of the connecting part, the free end of the movable contact piece being It is characterized in that it is bent toward the bottom plate and abuts on the elastic 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 by punching and bending a single conductive metal plate. 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 portion 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 portion inward, and a strip-like piece 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 has a slope portion 12 folded back inside the connection portion 2 from the bent portion 11, a contact portion 13 with the insertion connection terminal, and a contact portion 13 of the bottom plate 8 approximately perpendicular to the contact portion 13. A tip portion 14 is formed which is bent in the direction, and the contact portion 13 is formed with the fixed contact piece 6,
It is arranged with spring properties so as to face 7. Furthermore, reinforcing ribs 15 are provided in the longitudinal direction of the bent portion 11 of the movable contact piece 9 as required, so that the rigidity of the movable contact piece 9 is increased. Two rows of slots 16 and 17 facing in the longitudinal direction are formed in the bottom plate 8, and the strip between these slots 16 and 17 is raised in an upward arc to form an elastic piece 18, and a movable contact piece. 9 is elastically supported.

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. Since the distal end portion 14 of the movable contact piece 9 is supported by the elastic piece 18 that is supported on both sides, the movable contact piece 9
The elastic holding force of is determined by the elasticity of the movable contact piece 9 and the elastic piece 18.
This is caused by the sum of the elasticity of Therefore, the amount of deflection of the movable contact piece 9 is small and the elastic supporting force is large.
Good conductive contact can be obtained by strongly pressing the insertion connection terminal against the fixed contact pieces 6 and 7.

In the present invention, by providing the elastic piece 18,
As mentioned above, since the elastic pressing force on the insertion connection terminal is the sum of the spring forces of the movable contact piece 9 and the elastic piece 18, the spring force that must be generated in each to obtain the required elastic force is a small value, It becomes possible to easily manufacture even small-sized connection terminals. Furthermore, in the case of the conventional one-piece spring connection terminal, in order to reduce the load on the bent part 11 and obtain a predetermined amount of deflection, it is necessary to increase the length from the bent part 11 to the contact part 13. However, the double-sided elastic piece 1 according to the present invention
Since the load on the movable contact piece 9 was reduced by 8,
This length can be shortened. If this length is shortened, the rigidity of the movable contact piece 9 will be increased, the resistance force against the prying force of the insertion connection terminal will be increased, and the design for obtaining the required elastic force will be facilitated. Furthermore, it is also possible to reduce the thickness of the conductive metal plate for manufacturing the connection terminal 1, thereby reducing the cost.

In the second embodiment shown in FIG. 5, the tip end 14 of the movable contact piece 9 is bent in an oblique direction and is brought into contact with an elastic force 18 from the bottom plate 8. Further, other parts are the same as those in the previous embodiment, and the same reference numerals indicate the same parts.

The operation of this embodiment is almost the same as that of the previous embodiment, but the movable contact piece 9 has a softer elasticity than the case where the tip portion 14 is bent at a right angle as in the previous embodiment. Therefore, the elastic force of the movable contact piece 9 can be adjusted using this bending angle.

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. Furthermore, the reinforcing ribs 15 also play a role in increasing the rigidity of the movable contact piece 9, but are not necessarily essential.

As explained above, the connection terminal according to the present invention is
The strength of the movable contact piece is increased by providing a movable contact piece with folds and an elastic piece with double-sided support to form a spring that moves together when in use. It has the advantage of having sufficient resistance to prying forces, being able to be manufactured from a thinner conductive metal plate with a smaller area than conventional ones, and being 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. It is a 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, 14 is a tip portion, 15 is a reinforcing rib, 16 and 17 are slots, and 18 is an elastic 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. It has a movable contact piece having a spring property, which is made by folding back the existing strip into the connecting part and facing the fixed contact part, and a double-sided elastic piece lifted up in an arc shape from the bottom plate of the connecting part, and the movable contact piece has A connection terminal characterized in that the free end is bent toward the bottom plate and abuts on the elastic piece. 2. The connection terminal according to claim 1, wherein the free end of the movable contact piece is bent at right angles to the bottom plate direction. 3. The connection terminal according to claim 1, wherein the fixed contact portion is a fixed contact piece bent at right angles inward of the connection portion. 4. The connection terminal according to claim 1, wherein a reinforcing rib is formed on the bent portion of the movable contact piece along its longitudinal direction.