JPS6034769B2 - Manufacturing method of sealed electromagnetic relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a sealed electromagnetic relay, particularly a dip type sealed electromagnetic relay.

Conventionally, in order to make electromagnetic relays sealed, epoxy resin was injected into the gap between the case and the terminal block to prevent resin from entering the contacts, etc., but this method It is difficult to seal electromagnetic relays, and even if they could be sealed, they had the drawbacks of poor productivity and high costs.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a method for manufacturing a sealed electromagnetic relay that has good productivity and can be reliably sealed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are exemplary embodiments.

Figure 1 shows a dip type sealed electromagnetic relay.
, 2 is an upper case and a lower case, 3 is a main body equipped with a contact part, an electromagnet part, etc., and terminals 4 each consisting of a coil terminal, a movable terminal, a fixed terminal, etc. are provided on both sides of the main body 3.
The terminals 4 protrude one by one and are connected to external terminals 5 by spot welding.

The external terminal 5 is held from both sides by nonwoven fabrics 6 and 7 such as polyester or glass cloth impregnated with epoxy resin, and the cases 1 and 2 are adhesively fixed with the nonwoven fabrics 6 and 7 in between.

Next, a method of manufacturing the sealed electromagnetic relay having the above structure will be explained.

First, as shown in FIG.
by spot welding, and frame-shaped nonwoven fabrics 6 and 7 are attached to both the front and back surfaces of the external terminal 5 so as to surround the main body 3.

At this time, the nonwoven fabrics 6 and 7 are positioned so as to lie against the outer peripheral surface of the main body 3. Next, both cases 2 are bonded with nonwoven fabrics 6 and 7 in between so as to cover the main body 3, and while pressing both cases 2 from front to back, the vicinity of the bonded portion is heated with a heater (not shown). ), and the gaps between the cases 1 and 2 and the external terminals 5 are filled with the epoxy resin impregnated into the nonwoven fabrics 6 and 7 to seal the inside of the case. Incidentally, a small hole may be made in advance in either one of the cases 1 and 2, and after the cases are bonded, the gas inside the case may be extracted through this small hole and an inert gas may be filled in the case.

After sealing as described above, each external terminal 5 is separated and bent as shown by the dashed line in FIG. 1 to complete the manufacture.

As is clear from the above explanation, according to the present invention, it is possible to complete the work from connecting the main body to sealing it by simply assembling the external terminal from the front and back while keeping the external terminal connected. , automation is possible, and the sealing process can be easily performed by simply pressurizing and heating the nonwoven fabric.
Productivity can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a sealed electromagnetic relay according to the present invention, and FIG. 2 is a perspective view of an external terminal. 1, 2... Case, 3... Main body, 4... Terminal, 5... External terminal, 6, 7... Nonwoven fabric. Figure 1 Figure 2

Claims (1)

[Claims] 1. Connect each terminal of the main body, which is equipped with a contact part and an electromagnet part, etc., to the external terminal punched out in a connected state, and attach a frame-shaped nonwoven fabric impregnated with semi-cured adhesive resin to both the front and back sides of the external terminal. , two cases having openings having substantially the same shape as the nonwoven fabric are bonded together so as to cover the main body from the front and back directions, with the nonwoven fabric in between, and at least the bonded portion is bonded while applying pressure to both cases. A method for manufacturing a sealed electromagnetic relay, characterized by forming a sealed structure by heating and then separating each external terminal.