JPH02226633A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To lower friction coefficient and powder generation owing to friction by installing cylindrical materials in necessary parts to support a contactor. CONSTITUTION:Both ends 4b of a contactor 4 are brought into contact with and separated from magnetic poles in both ends 2a of a U-shape yoke core 2, on which a coil 1 is coiled of an electromagnetic relay, by magnetic force. A permanent magnet 3 is installed in the center of the yoke core 2 and a cylindrical material 5 is installed between the magnet 3 and the contactor 4 and the contactor 4, which is supported by the material 5, swings while centering the material 5. As a result, the friction coefficient of the contactor supporting part is lowered and powder generation by friction is lowered as well.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to an electromagnetic relay.

In particular, it relates to an electromagnetic relay in which the upper end of a permanent magnet placed in the center of a U-shaped core supports the shear motion of an armature made of a magnetic material, and switches the contacts by the sheen motion of the armature.

[Prior Art] Conventionally, as shown in FIG. 3, this type of electromagnetic relay includes an electromagnetic block A in which a permanent magnet 3 is arranged in the center of a U-shaped iron core 2 around which a coil l is wound; It is provided with an armature 4 which is swingably supported by the upper part of the permanent magnet 3 and which switches electrical contacts by having both ends contact or separate from both ends 2a of the U-shaped iron core 2 by swinging motion.

In the conventional electromagnetic relay, the armature 4 was directly supported by the semicircular protrusion 4a of the armature 4 on the upper surface of the permanent magnet 3.

[Problems to be Solved] In the conventional electromagnetic relay described above, the armature 4 is directly supported by the semicircular protrusion 4a.
The problem is that the coefficient of friction between the armature and the permanent magnet 3 is large, and the tilting movement of the armature 4 generates a large amount of friction powder, which scatters and causes contact failure.

The present invention has been made in view of the above-mentioned problems.
The purpose of the present invention is to provide an electromagnetic relay that can reduce the friction coefficient between an armature and a permanent magnet and reduce the generation of friction powder.

[Means for Solving Problems 1] In order to achieve the above object, the present invention includes an electromagnet block having a permanent magnet arranged in the center of a double-shaped iron core around which a coil is wound, and an oscillating rotor above the permanent magnet. Supported by the running,
In an electromagnetic relay comprising an armature whose both ends contact or separate from both ends of the U-shaped iron core by swinging motion to switch electrical contacts, the armature is supported between the permanent magnet and the armature. The structure includes a cylindrical member or a cylindrical member made of a magnetic material.

[Examples] Examples of the present invention will be described below with reference to the drawings.

First Embodiment> FIG. 1 is a schematic front view showing a first embodiment of an electromagnetic relay according to the present invention.

In this embodiment, a permanent magnet 3 is placed in the center of a U-shaped iron core 2 around which a coil 1 is wound, and a cylindrical part (or cylindrical part, the same applies hereinafter) made of a magnetic material is placed on the upper surface of the permanent magnet 3. 5 is placed.

The armature 4, which is disposed such that its ends 4b are opposed to the magnetic pole portions of both ends 2a of the U-shaped iron core 2, swings about the columnar part 5 as a fulcrum.

According to such an electromagnetic relay, the armature 4 and the permanent magnet 3
Since the cylindrical part 5 is arranged between the cylindrical part 5 and the armature 4, the armature 4 moves along the cylindrical surface of the cylindrical part 5, and the cylindrical part 5 itself is also a permanent magnet. It will rotate on the top surface of 3.

Therefore, the coefficient of friction between the armature 4 and the permanent magnet 3 is reduced, resulting in a smooth rocking motion.

Therefore, the generation of friction powder is greatly reduced, and positional deviation in the height direction is eliminated.6! It is possible to stabilize the characteristics of electrical appliances.

Second Embodiment FIG. 2 is a schematic front view showing a second embodiment of the TM relay base according to the present invention.

This embodiment differs from the first embodiment in that a one-arc shaped recess 3a is provided on the upper surface of the permanent magnet 3, and a cylindrical part 5 is placed in this recess 3a.

This configuration has the advantage that the position of one cylindrical part 5 can be determined accurately.

[Effects of the Invention] As explained above, the present invention has a cylindrical component placed between the armature and the permanent magnet, thereby reducing the coefficient of friction between the armature and the permanent magnet, resulting in smooth operation. A rocking motion is performed, which has the effect of greatly reducing the generation of friction powder.

Moreover, positional deviation in the height direction is also eliminated, and the characteristics of the relay can be stabilized.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a first embodiment of an electromagnetic relay according to the present invention, FIG. 2 is a schematic front view showing a second embodiment of a fi electromagnetic relay according to the present invention, and FIG. 3 is a schematic front view of a conventional example. It is a front view. l: Coil 2: Iron core 3: Permanent magnet 4: Armature 5; Cylindrical parts agent Patent attorney Kihei Watanabe

Claims (1)

[Claims] An electromagnetic block includes a permanent magnet arranged in the center of a U-shaped core around which a coil is wound, and an electromagnetic block that is swingably supported on the upper part of the permanent magnet. In an electromagnetic relay equipped with an armature that switches electrical contacts by touching or separating both ends, a cylindrical or cylindrical member made of a magnetic material that supports the armature is disposed between the permanent magnet and the armature. An electromagnetic relay characterized by: