JPS58123627A - Method of producing electric part - 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 in particular to a method of manufacturing an electrical component, in which a resin molded body is integrally provided on a plate-shaped metal member punched into a predetermined shape by insert molding.

The present invention relates to a method of manufacturing a root-shaped metal member having a plurality of upright pieces bent at approximately an angle from its main plane to a portion molded into a resin molded body.

FIG. 1 shows a base component of an electromagnetic relay as an example of an electrical component to which the manufacturing method according to the present invention is applied.

This base component is a part that becomes a package of a so-called DIP type electromagnetic relay.

This base component is made by integrally installing an insert 1 and a resin molded body 2 by molding on a plate-shaped metal member 1 that has been stamped into a predetermined shape. FIG. 2 shows the shape of the plate metal member 1 before the insert 1 is formed by a conventional manufacturing method.

The plate metal member 1 has a large number of external terminal pieces 1b, 1b, . . . and relay contact portions 1d, 1d inside the outer frame portion 1a.
,... and coil terminal 1c.

1C1, etc. are integrally punched and formed with a connecting bar 1e interposed therebetween. In particular, the coil terminal 10 is bent at a substantially right angle from the bent portion 1f after punching, and stands upright from the main plane of the plate-shaped metal member 1.

Hereinafter, this coil terminal 1C will be referred to as an upright piece 1c.

The plate-shaped metal part 11 is inserted into the inserter 1 in a mold as shown in FIG. be done. After forming the inserter 1, unnecessary portions such as the outer frame portion 1a and the connection +11e of the plate metal member 1 are removed, and the external terminal piece 1b is bent downward. This state is the state shown in FIG.

In the above-mentioned method for manufacturing electric components, a problem that has arisen in the past is that when the bent portion 1f of the upright piece 1C is included in the part of the plate-shaped metal member 1 to be resin-molded, this uprighting Use insert to bend piece 1C! However, even if a slight force is applied to the individual narrow upright pieces 1C, they tend to be deformed such as twisting or falling down, and the insert 1 to after molding with such deformation and,
This may result in defective products in which the upright piece 1C is not placed in the predetermined position, or in extreme cases, the deformed upright piece 1C may get caught in the mold, damaging the mold. .

This invention was made in view of the conventional problems mentioned in -1-, and its purpose is to make it possible to insert a cell into an insert molding die while maintaining high shape accuracy of the upright piece of a plate-shaped metal member. It is an object of the present invention to provide a method for manufacturing an electrical component in which the positioning accuracy of the X'L piece is high and damage to the mold is avoided.

In order to achieve the above object, the present invention provides that, when punching a plate-like metal member, the H-shaped tips of the portions described in - that will become the plurality of upright pieces are connected by a connecting crosspiece, and the The above-mentioned upright pieces are bent and formed while connected by connecting bars, and then the resin molded body is integrally installed on the plate-shaped metal member with the connecting bars exposed during insert molding. ), and then the connecting bar is removed.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 3 shows the shape of the insert 1 to the plate metal member 1 immediately before molding when the present invention is applied.

1 In this figure, the same parts as those shown in the conventional figure The four upright pieces 1C connect the tips of the adjacent upright pieces 1c, 1c with a connection 411 (1).Of course, this connection bar 1g is provided integrally during the punching process of the plate-shaped metal member 1. The two adjacent upright pieces IC, 1C are bent in a state ff1i connected by a connecting bar 19, and the third
Stand up as shown in the figure.

The above-mentioned plate-shaped metal member 1 is set in an insert mold, and a resin molded body 2 is integrally formed in a portion including the bent portion 1f of the upright piece 1G. At this time, the standing pieces 1c, 1c
A connecting bar 1Q connecting the two is exposed from the resin molded body 2. FIG. 4 shows the base part after insert molding according to the invention. However, in this figure, each external terminal piece 1b, 1b,...
. . , the outer frame portion 1a including the connection 11e has been cut away, and each external terminal piece 1b has been bent downward. As shown in the figure, the connecting bar 1g connecting the two upright pieces 1c, 1c is exposed from the resin molded body 2, and after the resin molding, this connection f110 is cut off, and the two upright pieces 1c, ic
Participate in. As a result, the base part of the electromagnetic relay shown at 5- in FIG. 1 is completed.

Here, in the manufacturing method according to the present invention, the plurality of upright pieces I Ch of the plate-shaped metal member 1 are set in an insert molding die while being connected by the connecting crosspiece 1 g. Therefore, as in the past, the individual upright pieces 1C were independent from the beginning, and each upright piece was likely to be deformed such as twisting or falling down.
In the present invention, in which the upright pieces 1C are connected by , deformation such as twisting or falling down becomes extremely difficult to occur, and insert molding can be performed while maintaining the high precision of the shape of the upright pieces 1C. Therefore, the final arrangement position of the upright piece 1C becomes extremely accurate, and there is no possibility of the deformed upright piece getting stuck in the inserter 1 or the mold after molding and damaging the mold.

Although the manufacturing method of the present invention has been explained using the base component of an electromagnetic relay as an example, the present invention is of course not limited to this, and the present invention can be applied to various other electrical components similar to this. It is possible.

6-

[Brief explanation of drawings]

FIG. 1 is a perspective view of a base component of an electromagnetic relay as an example of an electrical component to which the manufacturing method of the present invention is applied, and FIG.
Figure 3 shows the shape of the sheet metal member immediately before molding in the conventional method of manufacturing the above base part. FIG. 3 is a plan view showing the shape of a plate-shaped metal member immediately before inserter h molding when the method is applied. The front view, side view, and FIG.
FIG. 2 is a perspective view showing a state before cutting out a connecting bar connecting the upright pieces after pull-in-1 to molding. 1...Plate metal member 1a...Outer frame 1b...External terminal piece 1C...Earning X'L piece (coil pane piece) 1d・・・
. . . Contact portion 1e . . . Connector 1 f . . . Bending portion 1 g . . . Connection bar 2 that connects the upright pieces.

Claims (1)

[Claims] (1) A plurality of parts of a sheet metal member punched into a predetermined shape are bent at approximately right angles from its main plane to form a plurality of upright pieces, and insert molding is performed to encompass the bent parts of the upright pieces. In the method for manufacturing an electrical component in which a resin molded body is integrally provided on the plate-shaped metal member, when the plate-shaped metal member is punched out, the tips of the parts that will become the plurality of upright pieces are connected with a connecting crosspiece. The above-mentioned upright pieces are punched out in a rounded shape, and the upright pieces are bent and formed while connected by the connecting crosspieces, and then the resin molded body is integrally attached to the plate-shaped metal member with the connecting crosspieces exposed by insert molding. A method of manufacturing an electrical component, comprising: providing a connecting crosspiece, and then cutting off the connecting crosspiece.