JPH0213414B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a polarized relay.

According to the present invention, a yoke having an excitation coil wound therebetween, a permanent magnet body having both ends of the same pole corresponding to both magnetic pole parts of the yoke, and both ends of the yoke capable of coming into and out of contact with both leg ends of the yoke. The armature installed in
The number of parts is reduced by having a movable contact that contacts a fixed contact at both ends, and a movable spring that is attached to the intermediate part of the armature and supported by a common terminal so as to be able to swing together with the armature. It is an object of the present invention to provide a polarized relay with a small number of configurations and easy adjustment of contact pressure.

The polarized relay of the present invention will be explained below with reference to the drawings.

1 to 3, 1 is a coil frame housed in a suitable casing (not shown);
A letter-shaped yoke 2 is held, and an excitation coil 3 is wound around the body of the yoke 2. Reference numeral 4 denotes a permanent magnet body, for example, a pair of rod-shaped permanent magnets with the same poles joined together, and provided so that another same pole is located at both ends, and the both ends correspond to both magnetic pole parts of the yoke 2. A permanent magnet body 4 is arranged. The permanent magnet body 4 may be a single permanent magnet magnetized such that both ends thereof have the same polarity, and two poles different from the poles of both ends face each other in the middle part. Reference numeral 5 designates an armature that is swingably supported by a common terminal 8 with its central portion as a fulcrum, and both ends of the armature are provided so as to be able to move toward and away from each leg end of the yoke 2 alternately. Reference numeral 6 denotes a movable spring with movable contacts 7, 7 fixedly installed at both ends, and a common terminal 8 in the center of the movable spring 6.
are connected to form a T-shape. The common terminal 8 is inserted into and held by the side wall of the casing, and the movable spring 6 and the common terminal 8
A connecting portion thereof is fixed to the center portion of the armature 5, and the armature 5 and the movable spring 6 are held so as to be able to swing together. Reference numerals 9, 9 denote contact terminals on which fixed contacts 10, 10 that can come into contact with the movable contacts 7, 7 are fixedly installed, and are appropriately inserted into the casing and held therein.

Further, the operation of the present invention will be explained. When the excitation coil 3 is now energized and the yoke 2 is magnetized to a certain polarity, one magnetic pole part of the yoke 2 has a polarity different from that of one end of the permanent magnet body 4, and is short-circuited with the leg end of the yoke 2. The attractive force between the armature 5 and the armature 5 is weakened, and the other magnetic pole has the same polarity as the other end of the permanent magnet 4, so that the attractive force between the leg end of the yoke 2 and the armature 5 is increased. Therefore, when the yoke 2 is magnetized so that one magnetic pole part of the yoke 2 that contacts the armature 5 becomes the S pole in FIG. 1, the other end of the armature 5 is attracted to the other leg end of the yoke 2. . At the same time, the movable spring 6 whose central portion is fixed to the armature 5 moves to follow the armature 5, so that the movable contact 7 at one end is separated from one fixed contact 10, and the movable contact 7 at the other end is moved away from the other fixed contact 10.
come into contact with. At this time, a suitable twist is applied to the movable spring 6 supported by the common terminal 8, and sufficient contact pressure to the fixed contact 10 is ensured by the spring force of the movable spring 6.

As described above, according to the present invention, a common terminal is provided in the center of a movable spring, extending in a direction substantially perpendicular to the length direction of the movable spring and on the same plane, and furthermore, the tip of the common terminal is connected to a polarized relay. By inserting and holding the common terminal into the casing of the armature, the common terminal is used as the fulcrum of the armature, so there is no need for a spring or shaft for supporting the armature, which has the effect of reducing the number of parts. It is.

[Brief explanation of drawings]

FIG. 1 is a simplified sectional view of the polarized relay of the present invention, FIG. 2 is a plan view of the same portion, and FIG. 3 is an end view of the same portion. 1... Coil frame, 2... Yoke, 3... Excitation coil, 4... Permanent magnet, 5... Armature,
6...Movable spring, 7...Movable contact, 8...Common terminal, 9...Contact terminal, 10...Fixed contact.

Claims (1)

[Claims] 1. A yoke with an excitation coil wound in the middle, a permanent magnet whose ends of the same polarity correspond to both ends of the yoke, and an armature whose both ends are removably attached to both leg ends of the yoke. , a movable spring having both ends in contact with the fixed contact and a central portion attached to the intermediate portion of the armature, and a common terminal extending from approximately the center of the movable spring and having the intermediate portion inserted and held in the casing. Also, a polarized relay characterized in that the armature and the movable spring are swingably supported by the common terminal.