JPS62285326A - Manufacture of mobile contact piece - 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 3. Detailed Description of the Invention This invention relates to a method of manufacturing a movable contact piece used in an electromagnetic relay or the like.

[Prior art and its problems] This type of movable contact piece includes a single contact type, and a so-called twin contact α in which a movable contact is set at each tip of a bifurcated shape due to the contact reliability of the contact. Formula % Formula % Therefore, in the past, two different numbers of contacts and shapes were used.
These types of movable contact pieces must be manufactured in different processes using separate members, which has disadvantages such as an increase in manufacturing equipment, a decrease in production efficiency, and an increase in the cost of the product.

[Object of the invention] This invention was made in order to eliminate the above-mentioned drawbacks,
The purpose of the present invention is to provide a method for manufacturing movable pustules that is inexpensive and allows efficient manufacturing of different contact types using the same manufacturing equipment.

[Configuration and Effects of the Invention] This purpose is I! In order to achieve this, the method for manufacturing a movable contact piece according to the present invention includes forming a slit extending in the longitudinal direction in a movable contact piece material whose both ends are connected and held to a lead frame, and forming a slit extending in the longitudinal direction of the movable contact piece material. The present invention is characterized in that the cutting lines for cutting the portion in its width direction are selected on the inside and outside of the tip of the slit.

Thereby, a movable contact piece having a bifurcated contact and a movable contact piece having a single contact can be selectively and easily manufactured.

Therefore, most of the manufacturing equipment for both types of movable contact pieces can be shared, and both types of movable contact pieces can be manufactured on one production line, making it possible to create an efficient production system. As a result, reduction in product cost can be achieved.

[Explanation of Examples] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of the constituent members for explaining an example of the manufacturing method of the movable contact piece according to the present invention for a single contact type, and FIG. 3 is a manufacturing process chart for a twin contact type. , IA is a fixed terminal portion punched and formed in the lead frame 3, and a plurality of IAs are formed at predetermined intervals in the longitudinal direction of the lead frame 3.

Reference numeral 2A denotes a movable contact piece material, whose base end 2C in the longitudinal direction is fixed to the fixed terminal part IA by a caulk 4, and whose tip 2B is fixed via a connecting piece 5 fixed by the caulk 4. Connected and held to the lead frame 3,
In addition, a slit 6 is formed in the intermediate portion thereof, extending in the longitudinal direction from a position displaced toward the tip portion 2B side.

Further, the movable contact piece 2A has a pair of contact members 7A located on both sides of the slit 6 in FIG. 1, and one contact member 7A straddles both sides of the slit 6 in FIG. Each is fixed by welding.

Now, while the lead frame 3 is intermittently transferred in its longitudinal direction, the fixed terminal piece IA moves its both ends along the dotted line Y, and the movable contact piece 2A moves along the dotted line Y.

is cut by a press or the like along the dotted line X in FIG. 1 and along the dotted line Xi in FIG. 3, respectively.

This tag fixes the twin contact type movable contact piece 2 as shown in Figure 2 in Figure 1, and the single contact type movable contact piece 21 as shown in Figure 4 in Figure 3. It can be obtained in a state fixed to the terminal l.

That is, to explain the movable contact piece 2, the twin contact type movable contact piece 2 and the single contact type movable contact piece 2 can be separated by a very simple method depending on whether or not it is cut across the slit 6 formed in the movable contact piece material 2A. A movable contact piece 21 of the formula can be easily obtained.

In this way, since it is only necessary to mass-produce one type of movable contact piece material 2A before cutting in terms of shape, it is possible to manufacture two types of movable contact pieces 2 and 21 using the same manufacturing equipment. Efficient manufacturing is possible, and an inexpensive movable contact piece can be provided.

Further, by sharing the contact material 7A, it is possible to further reduce costs by mass production of a small number of products.

In addition, in FIG. 1, as shown in FIG. 5(a), the movable contact piece material 2A is placed across the slit 6.
If the movable contact piece material 2A and the contact material 7A are cut at the same time, a twin contact type movable contact piece 2 as shown in FIG. 5(b) can be obtained.

In other words, although FIG. 3 shows the manufacturing process of the single contact type movable contact piece 21 as shown in FIG. 4, in this FIG. 3, the movable contact piece material 2A and the contact material 7A are If they are cut at the same time as shown in FIG. 5(b), the twin contact type movable contact piece 2 shown in FIG. 2 can also be obtained.

Furthermore, in the above embodiment, the case where the movable contact piece 2゜21 is manufactured in a state that it is fixed to the fixed terminal l has been explained, but it can be said that the same effect can be obtained when only the movable contact piece is manufactured. Not even.

Further, in the above embodiment, the movable contact piece 2A is fixed to the lead frame 3 by caulking 4, but the movable contact piece 2A may be integrally formed with the lead frame 3.

[Brief explanation of the drawing]

1 and 3 are plan views of constituent members for explaining an example of the method for manufacturing a movable contact piece according to the present invention, and FIGS. 2 and 4 are side views of the product obtained by the above manufacturing method. ,
FIGS. 5A and 5B are side views of the main parts of the movable contact piece for explaining another manufacturing method. 2... Movable contact piece of bifurcated contact, 2A... Movable contact piece material, 2B... Tip part, 3... Lead frame, 6
... Slit, 7... Contact, 21... Single contact movable contact piece, X, Xi... Cutting line. Patent applicant Tateishi Electric Co., Ltd. agent Patent attorney Kunihide Namba (1 other person) (-,, country'
Phantom Kasumi No. 1121 Hawk No. 2121

Claims (2)

[Claims] (1) A step of forming a movable contact piece whose both ends are connected and held to a lead frame, a step of forming a slit extending in the longitudinal direction in the middle part of the movable contact piece, and a step of forming a slit at one end of the slit. and a step of cutting the tip of the movable contact piece in the width direction, and the cutting line in this cutting step is set on the inside and outside of the slit tip. By selecting 2
A method for manufacturing a movable contact piece, comprising selectively manufacturing a movable contact piece having a forked contact and a movable contact piece having a single contact. (2) The method for manufacturing a movable contact piece according to claim 1, wherein the bifurcated contact is formed by cutting the same contact material fixed to the movable contact piece material across the slit.