JPH0343764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The object of the present invention is to prevent a decrease in efficiency and characteristic deterioration due to floating of the hinge portion in a monostable polar electromagnet.

Conventionally, as shown in FIG. 1, opposing pieces 7 at both ends of two yokes 5 and 6, in which permanent magnets 9 are interposed at both ends of an armature 2 passing through a coil 1, that is, one end 3 and the other end 4, are used. 8 and the hinge end 10 of one yoke 6
The other end 4 was in hinge contact with the hinge end 10, and the one end 3 was reversibly inserted between the two yoke facing pieces 7 and 8.

In a conventional device with such a configuration, the coil 1
When not energized, due to the magnetism of the permanent magnet 9, the hinge end 10 becomes the S pole and the opposing piece 7 of the yoke 5 becomes the N pole, so that one end 3 of the armature 2 becomes the opposing piece 7 and the other end 4 becomes the hinge end 1.
When the coil 1 is excited so as to repel the magnetized magnetic poles of the yokes 5 and 6 due to the magnetism of the permanent magnet 9, one end 3 of the armature 2 is repelled by the opposing piece 7 and the opposite piece 8 is attracted and reversed, and the other end 4 of the armature 2 also repulses against the hinge end 10, creating a gap between them and opening up to the stopper 11. This air gap causes problems such as an increase in the excitation current of the coil 1, a decrease in efficiency, and a significant decrease in open circuit voltage characteristics.

The present invention has been made to improve the above-mentioned conventional situation. Embodiments of the present invention will be described below with reference to FIGS. 2 to 5, in which the present invention is applied to a relay. Note that the same parts as in the conventional example in FIG. 1 are given the same reference numerals.

An armature 2 is inserted through a coil 1 wound around a coil frame 12, with one end 3 disposed between opposing pieces 7 and 8 and the other end 4 at a hinge end 10. The hinge end 10 is bent into an L shape along the other end 4, and a protrusion 10a is punched out on the other end 4 side, and a depression 1 is formed on the other surface during processing.
0b is formed.

The clamping pressure member 13 is made of an elastic metal, and has protrusions 13a, 13a protruding from the clamping part.

Then, at the clamping part of the clamping pressure member 13a, the hinge end 1
0 and the other end 4, and make a depression 10b in the protrusion 13a.
and is fitted into the recess 4a of the other end 4 to be positioned and held.

Then, an insulating member 1 is placed near one end 3 of the armature 2.
4 is attached, and a metal card 15 integrally molded with this insulating member 14 is used to connect the contact spring 1 on the base 16.
7, 17, and contact spring 17 is connected to NC contact 1.
8. It is designed to switch between NO contacts 19 to open and close. Since the card 15 is made of metal, the contact springs 17 and the like are not deformed by heat, and the characteristics are stable. 20
is a coil terminal of the coil frame 12, which is connected to the coil terminal 21 on the base 16. 22 is base 1
This is a case that can be placed over 6.

Since the hinge end 10 and the other end 4 are brought into pressure contact with each other by a pressing force that exceeds the repulsive force between them, there is no floating, the efficiency of the magnetic circuit does not decrease, and the open circuit voltage can be stabilized.

As explained above, according to the levitation prevention device for a monostable polarized electromagnet of the present invention, both ends of the armature 2 inserted through the coil 1 are connected to two yokes 5 with a permanent magnet 9 interposed in the center thereof. , 6, one end 3 of the armature 2 is reversible between the two yokes, and the other end 4 of the armature 2 is in contact with one of the yokes 6, 7. The prevention device is characterized in that the other end 4 of the armature 2 and the yokes 6, 7 are brought into pressure contact with each other by a clamping pressure member 13 that exceeds the repulsive force acting between them. It is possible to prevent floating of the magnetic circuit, and to obtain remarkable effects such as no decrease in efficiency of the magnetic circuit and no significant decrease in open-circuit voltage.

Moreover, its structure is simple and assembly is easy.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional example. Figures 2 to 5 show embodiments of the present invention, with Figure 2 being a front view, Figure 3 being an exploded perspective view, Figure 4 being an exploded perspective view applied to a relay, and Figure 5 being a perspective view of a card. It is a diagram. 1... Coil, 2... Armature, 3... One end, 4... Other end, 5, 6... Yoke, 7, 8...
Opposing piece, 9... Permanent magnet, 10... Hinge end, 1
3... Clamping member, 15... Card.

Claims (1)

[Claims] 1. Both ends of the armature inserted through the coil are inserted between opposing ends of two yokes with a permanent magnet interposed in the center between them, and one end of the armature is reversible between the two yokes, and the armature is In a levitation prevention device for a monostable polar electromagnet, the other end of which is in contact with one of the yokes, the other end of the armature and the yoke are pressed into contact with each other by a clamping member that exceeds the repulsive force acting between them. A levitation prevention device for a monostable polarized electromagnet, which is characterized by: