JPH028345Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electromagnetic relay having a multi-pole contact configuration and equipped with a permanent magnet for DC arc interrupting.

[Background technology]

In this type of electromagnetic relay, as shown in FIG.
A permanent magnet 3 for cutting off DC arcs was housed inside, and the outer peripheral wall 2a of the recess 2 was interposed between the contact terminal plates (not shown) of each pole on the body (not shown). However, it is difficult to set a sufficient insulation distance between adjacent contact terminal plates, and a high value of withstand voltage between different electrodes cannot be secured.

[Purpose of invention]

The present invention was developed in view of these drawbacks, and its purpose is to provide an electromagnetic relay that can improve the withstand voltage between different poles even if it is equipped with a permanent magnet for DC interruption.

[Disclosure of invention]

FIG. 2 shows a partially omitted perspective view of one embodiment. In the figure, 4 is a body, and contact terminal plates 5a and 5b are implanted in parallel on both sides of the body 4 by integral molding or the like. An insulating wall 6 integrally formed with the body 4 is interposed between the contact terminal plates 5a and 5b, which are erected on both sides of the upper part of the body 4. This insulating wall 6 has an inverted L-shaped thin wall portion 6a at its outer periphery, and has a convex cross section at the center. On the other hand, the case 1 attached to the body 4 has a recess 2
Parallel ribs 7 are provided protruding along the center of the lower surface of the outer peripheral wall 2a and the hanging inner wall at the end of the case 1, and when the case 1 is mounted on the body 4, the grooves of the parallel ribs 7 7a into the thin wall portion 6a of the insulating wall 6 as shown in FIG.
and the insulating wall 6 to connect the contact terminal plates 5a, 5 on both sides.
b is insulated and isolated. In addition, the contact terminal plate 5
The DC arc generated between the contacts a, 5b and a movable contact plate (not shown) which can be freely contacted and separated can be interrupted by the magnetic force of the permanent magnet 3 housed in the recess 2.

Although the driving mechanism of the electromagnetic relay is omitted in the above embodiment, a general mechanism may be used.

[Effect of idea]

In the present invention, the outer circumferential wall of the recess in which the DC arc interrupting permanent magnet configured as described above is housed is suspended from above between the contact terminal plates of each pole, and the outer circumferential wall of the insulating wall erected on the body is suspended from above between the contact terminal plates of each pole. Since the grooves of the parallel ribs formed on the lower surface of the outer peripheral wall are fitted, the withstand voltage between the contact terminal plates of each pole can be increased, and even if permanent magnets for DC arc are installed, they can be placed close together. This has the advantage that the withstand voltage between different electrodes can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a conventional case, FIG. 2 is a partially cutaway exploded perspective view of an embodiment of the present invention, and FIG. 3 is a sectional view of the same.
1 is the case, 2 is the recess, 2a is the outer peripheral wall, 3 is DC
Permanent magnet for arc interruption, 4 is the body, 5a, 5b
is a contact terminal board, 6 is an insulating wall, 7 is a parallel rib, 7a
is a groove.

Claims (1)

[Scope of utility model registration request] In an electromagnetic relay with a multi-pole contact configuration, an insulating wall is erected on the body between the contact terminal plates of each pole that are erected in parallel on the body, and a top opening is installed on the ceiling of the case that is attached to the body. A recess is provided, and the outer peripheral wall of the recess that hangs inside the case is arranged between the contact terminal plates, and the outer peripheral edge of the insulating wall is inserted into the groove of the parallel ribs formed on the lower surface of the outer peripheral wall of the recess. An electromagnetic relay that fits together and houses a DC arc interrupting permanent magnet in the recess.