JPS5920976A - Connecting terminal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to 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 a push-in 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, and this connecting terminal 1 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 part 2 is formed into a box shape by bending a metal plate, and includes a fixed contact piece 6.7 formed by bending both edges 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 end of the fixed contact piece 6.7 has a curved surface 10, which serves as a guide for the insertion terminal. The movable contact piece 9 has a slope part 12 folded back inside the connecting part 2 from the bent part 11, a contact part 13 with the insertion connection terminal, and a part of the bottom plate 8 at a substantially right angle to the contact part 13. The contact portion 13 is arranged with a spring property so as to face the fixed contact piece 6.7. Further, the bending portion 11 of the movable contact piece 9 is provided with reinforcing ribs 15 in the longitudinal direction as necessary, so that the rigidity of the movable contact piece 9 is increased. The bottom plate 8 has two rows of longitudinally oriented slots 1.
6.17 are formed, and the strip portion between these slots 16.17 is raised in an upward arc to form an elastic piece 1.
8, and elastically supports the tip 14 of the movable contact piece 9.

In use, this connection terminal l is accommodated in the housing of the connector. The insertion connection terminal (not shown) is the fixed contact piece 6.
．． 7 and the sloped surface 12 of the movable contact piece 9, and is inserted between the fixed contact piece 6.7 and the contact part 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 1B having both ends, the elastic holding force of the movable contact piece 9 is generated by the sum of the elasticity of the movable contact piece 9 and the elasticity of the elastic piece 18. Therefore, the amount of deflection of the movable contact piece 9 is small and the elastic supporting force is large, and the insertion connection terminal can be strongly pressed against the fixed contact piece 6.7 to obtain good conductive contact.

In the present invention, by providing the elastic piece 18, the elastic pressing force against the insertion connection terminal becomes the sum of the spring forces of the movable contact piece 9 and the elastic piece 18, as described above, so that the required elastic force can be obtained. The spring force that should be generated in each of these becomes a small value, making it possible to easily manufacture small-sized connection terminals. Furthermore, in the case of the conventional one-piece spring connection terminal, in order to reduce the load on the bending portion 11 and obtain a predetermined amount of deflection,
Although it was necessary to increase the length from the bending part 11 to the contact part 13, since the load on the movable contact piece 9 was reduced by the double-sided elastic piece 18 according to the present invention, it was possible to shorten this length. Become. 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.

The second embodiment shown in FIG.
4 is bent in an oblique direction and is touched by an elastic piece 18 from the bottom plate 8. Further, other part numbers are the same as 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 elastic “curve” than the case where the tip 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 the above embodiment, the fixed contact piece 6.7 was formed opposite the movable contact piece 9, but this fixed contact piece 6.
7 can be used as a flat fixed contact part without intentionally providing a bar in the direction perpendicular to the upper surface.Furthermore, the reinforcing rib 15 also plays a role in increasing the rigidity of the movable contact piece 9, but it is not always necessary. It's not something.

As explained above, the connection terminal according to the present invention is provided with a movable contact piece having a folded back and an elastic piece with both sides, and by forming a spring that moves together in the use state, the strength of the movable contact piece is increased. However, it has the advantage of having sufficient resistance to prying force caused by forceful insertion of the plug-in 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, and FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a partially cutaway plan view, FIG. 3 is a front view, and FIG. 4 is a partially cutaway plan view. FIG. 5 is a vertical sectional view of another embodiment. Symbol l is a connection terminal, 2 is a connection part, 3 is a wire crimping part, 6.
7 is a fixed contact piece, 8 is a bottom plate, 9 is a movable contact piece, 10 is a curved surface part, 11 is a bent part, 12 is a slope part, 13 is a contact part, 1
4 is the tip, 15 is the reinforcing rib, 16.17 is the slot,
18 is an elastic piece. Patent applicant: Nissan Motor Co., Ltd. Shinagawa Automotive Wire Co., Ltd.

Claims (1)

[Claims] 1. A substantially box-shaped connection portion is formed by bending one conductive metal plate, and includes a fixed contact portion provided on the top surface of the connection portion, and a contact portion extending forward from the front end of the bottom plate of the connection portion. The movable contact piece has a spring-like movable contact piece formed by folding an extended 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. A connecting terminal characterized in that a free end of the elastic piece is bent toward the bottom plate and comes into contact with 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 in the direction of the bottom plate. 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 along the longitudinal direction of the bent portion of the movable contact piece.