JPS5838897B2 - Manufacturing method of lead wire frame for switchgear device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a lead wire frame for a switchgear device.

GB Patent Specification No. 1,266,817 discloses two spaced end strips stamped from sheet metal material and generally rectangular in shape to carry a plurality of lead wires in spaced relation to one another;
A reed relay having two spaced apart side strips.
A lead wire frame for use in an ed relay) assembly is disclosed.

One end of the lead wire is formed as a contact pin and the other end of the lead wire is formed as a contact portion that is connected to a component carried by the reed relay containing assembly.

In the known lead wire frame mentioned above, any of its contact parts can function as a moving contact with switch action, and therefore a separate lead relay is required to provide the necessary switch action. do.

This is because, due to the shape of the lead frame, any contacting portions of the leads may overlap and therefore cannot be brought into contact to provide switch action.

According to the invention, a plurality of first contact members extend integrally with and substantially perpendicularly from the first side strip, and integrally with the second side strip. and a plurality of second contact members extending substantially perpendicularly from the strip, and the measuring strips are in spaced apart parallel relationship with each other by two end strips spaced apart from each other. a lead frame blank is stamped from sheet metal material such that the contact members have contact arms at their ends closest to each other, and then the end strips are spaced apart from each other. a lead for a switchgear device, the lead comprising: forming a channel-shaped material by bending the contact member at points and bending the contact member such that intermediate portions of the contact arm and the end strips form a bottom of the channel; A method for manufacturing a wire frame for a switch device, characterized in that the both end strips are deformed so that both the measuring section strips are close to each other and at least two of the contact arms overlap. A method of manufacturing a lead wire frame is provided.

In the method of the invention, it is desirable to remove a portion of the side strips to form a pin portion at the end of each contact member and to electrically isolate the contact members from each other.

The lead frame produced by the method of the invention has a channel shape with two side strips extending along two respective sides of the channel and extending across the bottom of the channel. and an intermediate portion of the two end strips, the front end strip being deformed such that the at least two contact arms overlap each other.

Preferably, each end strip is folded inwardly at the junction of the intermediate section and the remaining section.

An advantage of the present invention is that the lead frame has relatively movable overlapping contact portions that provide switch action and does not require a separate glued relay to provide switch action.

Next, embodiments of the present invention will be described with reference to the drawings.

A lead frame 18 is stamped and formed from a plate-shaped conductive material such as phosphor bronze.

Preferably, this material is gold-plated along the narrow bands that are to be formed as physical contact points.

The first manufacturing step is to create the blanked blank shown in FIG. 1 by a punching operation.

This material has an upper strip 80, a lower strip 81, a left end strip 82, and a right end strip 83.

Inside these strips there are sixteen contact members 84, eight of which are integral with and project inwardly from the upper strip 80.

The other eight pieces are integral with the lower side strip 81 and protrude inwardly therefrom.

The 16 contact members 84 have two sets of configurations, each set including one two-pole-double-throw switch, two brake arms,
Two coil contact arms are to be formed, one set to the right of the dotted line 104 in FIG. 1 and the other set also to the left.

Since the two sets of contact members are of the same shape, only the one on the right side of FIG. 1 will be described.

After blanking, the blank 18 is formed into the channel shape shown in FIG. 2 by folding the end strips 82, 83 at two spaced points and folding the contact member 84, extending across the base of the channel. and forms a contact arm 118 carried by the side strips 81.

Each set of two outer contact arms 118 includes two branches, with the outer branches 114 bent downwardly and generally parallel to the sides of the channel.

The inner branch 116 remains along the base of the channel.

The two inner contact arms 118 of each set constitute a movable contact or switch arm and are mirror images of each other.

Near the inner ends of these contact arms 118 are formed into two fingers, the outer fingers 120 being offset from the body of the contact arms 118 and angled downwardly, normally acting as open contacts. do.

Inner fingers 122 are elongated portions of the body of contact arm 118 and normally act as closed contacts.

Also projecting across the base of the channel are four fixed contact arms, which also project from the side strips 80.

The outermost arm forms a normally open fixed contact 124 and the innermost arm forms a normally closed fixed contact 126.

At the manufacturing stage shown in FIG.
20 and 122 are separated from the fixed contacts 124 and 126 without engaging with them.

To overlap the contacts, the end strips 82, 83 are subjected to a shearing operation.

The intermediate portion of each end strip 82, 83 has a bent portion 128 thereto.
3, by forming a . . .

This action reduces the distance between the side strips 80, 81 so that the fixed and movable contacts overlap each other by the desired distance.

An appropriate shape is one in which the movable contact 120 is below the fixed contact 124 and the movable contact 122 is above the fixed contact 126.

After mounting the lead frame as described above in an assembly such that the contact member 84 is mounted in the desired relative position, the excess portion of the lead frame, i.e. between the end strips 82, 83 and the contact member 84, is removed. portions of side strips 80, 81 are removed to electrically isolate contact members 84 from each other as shown in FIG.

As shown in this figure, portions of the side strips 80.810 are removed to form a contact pin 106 at the end of each contact member 84, so that the lead frame can be inserted into a printed circuit board (not shown). Mounted in the accommodating bore, the contact member 84 extends to the outwardly facing shoulder 110.

The shoulder serves to engage and position the lead frame on the printed circuit board during use.

[Brief explanation of the drawing]

1 is a plan view of a punched lead wire frame blank according to the present invention; FIGS. 2 and 3 are partial perspective views of successive stages of manufacturing the lead wire frame of FIG. 1; and FIG. Completed IJ- manufactured from the blank shown in Figure 1
FIG. 3 is a perspective view of the wire frame. so, si... Side strip, 82, 83... End strip, 84... Contact member, 106... Contact pin, 118
... Contact arm, 120, 122 ... Finger section, 124
, 126... Fixed contact.

Claims (1)

[Claims] 1 a plurality of first contact members extending integrally with and substantially perpendicularly from the first side strip; and integrally with and substantially perpendicularly from the second side strip; forming a plurality of second contact members extending at right angles, the measuring strips being integrally connected in a mutually spaced apart parallel relationship by two mutually spaced end strips; Both liquid contact members are stamped out of a sheet metal material with a contact arm at the ends closest to each other, and then the end strips are bent at two points spaced apart from each other and the A method for manufacturing a lead wire frame for a switch device, comprising forming a channel-shaped material by bending a contact member such that intermediate portions of the contact arm and the end strips form the bottom of the channel. , said both end strips 82,8
3, so that both the measuring section strips 8081 are close to each other and at least two of the contact arms overlap,
A method for manufacturing a lead wire frame for a switch device, the method comprising deforming the lead wire frame.