JPS587576Y2 - electromagnetic relay - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electromagnetic relay in which an arc barrier is provided between the coil lead wire holding portion of the coil spool and the relay contact.

In conventional electromagnetic relays, an arc barrier is integrated into the base to which the fixed contact terminal is attached, in order to prevent the coil lead wire from being adversely affected by the arc generated between the fixed contact terminal and the movable contact terminal. or set up
The coil lead wire is separated from the fixed contact terminal and drawn out from the collar on the yoke side of the coil spool.

This conventional structure has the following drawbacks.

First, if the arc barrier is integrated into the base, the coil spool and arc barrier will be installed in parallel, which will reduce the efficiency of using the internal space of the electromagnetic relay and unnecessarily increase the external dimensions of the electromagnetic relay. Cause.

Second, if a coil lead-out part is provided on the yoke-side collar of the coil spool, the collar must be made thicker or a cutout must be made in the yoke to ensure insulation performance between the coil and the yoke. There are drawbacks such as the external dimensions of the electromagnetic relay becoming unnecessarily large and the processing cost of the yoke increasing.

Therefore, this invention overcomes the above-mentioned conventional drawbacks, and creates an electromagnetic relay that can prevent the coil lead wire from breaking caused by the arc generated between the fixed terminal and the movable contact terminal, and that can effectively utilize the internal space of the electromagnetic relay. The purpose is to obtain.

Hereinafter, embodiments of this invention will be described based on the drawings.

In FIG. 1, 10 is a yoke provided on a base 117, and this yoke 10 has an iron core 13 having a shaded coil 12 at its tip, and a coil around which an electromagnetic coil 14 is wound. A spool 15 is provided respectively.

Reference numeral 16 denotes a movable iron piece hinge-supported by an upper bent piece 17 of the yoke 10, and an insulating member 19 having a movable contact piece 18 is fixed to this iron piece 16.

20 is a terminal block located on the base 11 and fixed to the lower bent piece 21 of the yoke 10, and this terminal block 20 is provided with a normally closed fixed contact terminal 22 and a normally open fixed contact terminal 23. ing.

24 is a coil spring, and this spring 24 causes the contact 25 of the movable contact piece 18 to come into contact with the contact 26 on the normally closed side, and maintain a constant distance between it and the contact 27 on the normally open side.

When the electromagnetic coil 14 is energized, the movable iron piece 16 is attracted to the iron core 13 against the coil spring 24, and the contact 2
The contact between 5 and 26 is open, and the contact between 25 and 27 is closed.

28 is a case. As shown in FIG. 2, coil lead wire holding portions 30 are provided protruding from both sides of the collar portion 29 of the coil coil 15. As shown in FIG.

The coil lead wire 31.31 is wound around the holding portion 30 several times and connected to a predetermined external terminal 32 (see FIG. 1).

An arc barrier 33 is formed on the flange portion 29 between the coil lead wire holding portion 30 and the contact 27 on the normally open side.

As shown in FIG. 1, the outer peripheral edge 34 of the arc barrier 33 is located between the normally open fixed contact terminal 23 and the lower bent piece 21 of the yoke 10, and is in contact with the terminal block 20.

That is, the arc barrier 33 also serves as an arc barrier between the normally open fixed contact terminal 23 and the yoke 10.

In FIG. 2, 35 is a guide groove for the coil lead wire 31.

As shown in FIG. 3, as a holding means for the coil lead wire 31,
A coil lead wire holding part 30 is provided on the inner surface of the collar part 29 at a predetermined interval and protrudes, and a coil lead wire 31 is provided between the two parts 29 and 30.
can be held.

Further, the coil lead wire 31 can be heat-sealed to the holding portion 30 thereof.

As shown in FIG. 4, the arc barrier 33 is connected to the coil spool 1.
The flange 3 of the iron core 13 is formed separately from the flange 29 of the iron core 13.
6 can be crimped and fixed to the collar portion 29 of the coil spool 15.

According to this invention, a coil lead-out wire holding part is provided in the collar of the movable iron piece of the coil spool, and an arc barrier is provided integrally with this collar, and the arc barrier is provided between the fixed contact terminal and the coil lead-out wire. With this arrangement, it is possible to obtain a compact electromagnetic relay that can effectively utilize the internal space of the electromagnetic relay and also ensure the insulation of the coil lead wire.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an electromagnetic relay according to an embodiment of the invention, Fig. 2 is a perspective view of the main parts of the spool, Fig. 3 is a perspective view showing a modified example of the coil leader wire holding part, and Fig. 4 The figure is a configuration diagram showing another example of the arc barrier. 10...Yoke, 13...Iron core, 15
......Coil spool, 20...Terminal block, 23...Terminal, 26...Contact, 29
...Brim portion, 30...Coil leader wire holding portion, 31...Coil leader wire, 33...
・Arc barrier, 34...Outer periphery.

Claims (1)

[Claims for Utility Model Registration] A terminal block in which a fixed contact terminal is installed, a yoke attached to this terminal block, a coil spool attached to this yoke via an iron core, and a movable terminal block attached to one end of the yoke. In an electromagnetic relay including an iron piece and a movable contact piece attached to the movable iron piece, a coil lead wire holding portion is provided on the same side of the coil winding portion of the fixed contact terminal side flange portion of the coil spool, and
An electromagnetic relay characterized in that an arc barrier formed integrally with the flange portion is disposed between the coil leader wire holding portion and the fixed contact terminal.