JPS5889720A - Electric contact and method of producing same - 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 an electrical component and a method for manufacturing the same.
The object of the present invention is to provide an electrical contact that has a strong fixation of the contact member, can withstand long-term use, and is highly productive.

Conventionally, the structure of this type of electrical contact and its manufacturing method are as shown in FIG. 1 (5).
．． A flat plate spring (1) made of an extremely thin phosphor bronze plate or the like is punched out to form holes (la) and f.
The contact member (2) is formed by punching out a clad material made of gold, silver alloy, etc., which will become the contact (2b), on a base material (2a) such as brass. ) After that, as shown in Fig. la1 (B), the contact member (
The contact member (2) was fixed to the leaf spring (11) by tightening both edges of the contact member (2) from the top and bottom.

However, in the above-mentioned conventional method, the stress due to the tightening of the contact member (2) is concentrated on one side of the hole (la), and therefore the thin flat leaf spring (1) undulates due to this concentrated stress. Distortion occurs, and the contact member (2) of the leaf spring 11+ has a wavy shape near the fixation, resulting in a lack of quality and reliability, and the contact member (2) is loosely fitted into the hole (1a) of the leaf spring (1). In order to perform the patterning in the state where the contact member (2) is attached, the contact member (2) must have sufficient substitute for the shark, which requires a large number of expensive contact members (2), which increases the cost. However, after tightening, a part of the mother @ (2a) (2a5) is attached to the contact (2b) side. During long-term use, the exposed base material (2a) corrodes and the contact (2a) becomes exposed.
b) has the disadvantage of having a tailing effect on the shape of the leaf spring, and, furthermore, from a manufacturing point of view, the device for inserting the preformed small contact member (2) into the hole (1a) of the leaf spring (1); +1) requires a device to receive the contact member (2) loosely fitted into the hole (1a), which not only increases the size of the device but also hinders productivity improvement in automation. .

Therefore, the present invention aims to solve the above-mentioned conventional drawbacks, and the present invention will be explained below with reference to FIGS. 2 and 3.

In this figure, (5) is coated with tin plated plate (6) and has a thickness of 0.06 to 0.12.
A leaf spring made of extremely thin phosphor bronze plate, etc.
The plate pie includes a flat main body (5a) and a main body (5a).
A protrusion (5b) that protrudes conically from 5a) to one side, a hole (5C) located at the upper end of this protrusion (5b), and a hole (5C).
5C) and an edge part (5d) which is the edge of the
The formation of this edge part (5d) is shown in Fig. 3 (5).
After punching the leaf spring (5) to form a hole (5C) as shown in FIG. and the protrusion (
5b), the periphery of the hole (5c) is necessarily located within the hole (5C), forming an edge fil' (5d).

(7) is a contact (7b) on a base material (7a) made of brass etc.
) The contact member is made of a clad material treated with gold, silver, etc. to give The contact member (7) is fixed to the tip of the protrusion (5b) of 5), and the edge part (5d) of the fixed contact member (7) bites into the base material (7a), and the contact (7b) is inserted into the hole ( 5C) so that the base material (7a) is not exposed on the contact (7b) side.

Next, to explain the manufacturing method of the electrical contact having the above-mentioned structure, first, as shown in FIG. A hole (5c) is formed by processing, and then in the second step I!
As shown in Figure 3), the rigid side of the hole (5c) is subjected to a purring process to form a conical protrusion (5b).

An edge portion (5d) is provided within the hole (5c).

Next, in the third step, as shown in FIG. 3C), the leaf spring (
7: At the same time as the processing in step 5), the contact member (7) is punched out from the band-shaped cladding material (9) using the device (8), and at the same time, the punched contact member (7) is punched out. Press fit the contact member (7) into the edge part (5d) of the hole (5c) at the tip of the protruding part (5b) of the leaf spring (5).
5), temporarily hold the contact member (7), and then use the fourth paddle to squeeze the contact member (7) from above and below as shown in Figure 2.
) is fixed to the leaf spring (5), and then, in the final step, the leaf spring (5) is cut out from the hoop material along the shape of the electrical contact, thereby completing the production of the electrical contact.

Then, in the third step of the above manufacturing, the contact member (7)
is punched out of the clad material (9), and at the same time the leaf spring (
Since the contact member (7) is press-fitted into the edge part (5d) of the hole (5C) at the tip of the conical protrusion (5b) in 5) and is held, the contact member (7) is held by a plate pie. (5), the contact member (7) can be reliably positioned at the desired position.
) can be held in a position close to the hole (5C) of the leaf spring (5), so that during the next embedding process of the contact member (7), the contact CTo) can be held close to the hole (5C). Preparations can be made to cover one side of the contact member (7a) so that the base material (7a) is not exposed on the contact (7b) side. ) base material (7ri is the second
As shown in the figure, the edge part (5d) is deformed so as to swell up and down, and the edge part (5d) bites into the base material (7a), and the contact point (7b) As shown in the figure, the hole (5C) is deformed so as to cover one side of the hole (5C), so that not only the base material (7a) is not exposed on the contact (7b) side, but also the contact member (7) is The stress is at the protrusion (
5b), and minimizes the influence of strain on the flat plate-shaped main body (5a), while the purling process also strengthens the strength of the protruding part (5b). [The generation of distortion in the main body portion (5a) can be suppressed to a practically negligible extent.

That is, according to the present invention, the protrusion (5b) of the leaf spring (51)
Since the contact member (7) is fixed to the contact member (7), the stress due to the tightening of the contact member (7) is concentrated on the protrusion (5b),
The contact member (7) can be made of its base material ( 7a) into the edge part (5d), and at the same time, cut the hole (5) at the contact (7b) so that the base material (7a) is not exposed on the contact (7b) side.
Since the contact member (7) is fixed to the leaf spring (5) so as to cover one side of the contact member (7b), the base material (7a) on the contact member (7b) side can be firmly fixed to the pot. There is no corrosion of the contact member (7), so a stable contact state can be obtained over a long period of time.Furthermore, the contact member (7) made of clad material
At the same time as the punching process, it is press-fitted into the pearled protrusion (5b) of the leaf spring (5) and held, so it is not necessary to use a conventional device for connecting the contact member to the leaf spring and the contact member. There is no need for a holding device, which simplifies the manufacturing and feeding device, significantly improving productivity through automation, and since the contact member (7) is press-fitted and held, the tightening allowance can be reduced. It can be firmly fixed even if
Therefore, the contact member (7) can be made smaller and inexpensive.

Incidentally, it goes without saying that the wax to be coated (6) may be formed or omitted as required.

[Brief explanation of the drawing]

Figure 1 (4) is a cross-sectional view of the main part showing the configuration of a conventional electrical contact, Figures 2 and 3 are related to the present invention, and Figure 2 is a cross-sectional view of the main part showing the configuration of the electric contact. Figure 3 (5), (B), e
c) is a diagram for explaining the manufacturing method. (5) Temporary spring (5a) Main body (sb) yt
Shushu S (5C) hole (5d) edge part
(7) Contact member (7a) Base material (7b) Contact (8) Device +97 Clad material patent owner Alps Electric Co., Ltd.

Claims (1)

[Claims] 111 A leaf spring made of a thin phosphor bronze plate or the like has a conical projection projecting from the main body, a hole provided at the tip of the projection, and an edge located inside the hole. In addition, the contact member made of a clad material is made of a base material made of brass or the like and a gold etc. formed on the base material. An electrical contact characterized in that one side of the hole is reversed. (2) A process of making a hole in a leaf spring such as a phosphor bronze plate, a process of applying burring to both sides of the chain hole L-C, a process of forming a conical protrusion with a hole located at the tip, and a process of forming a cone-shaped protrusion with a hole located at the tip, and cladding material. A method for manufacturing an electrical component comprising the steps of punching out a contact member from a blank, simultaneously press-fitting the punched contact member into a hole at the tip of the protrusion, and inserting the contact member into the tip of the protrusion.