JP2539368Y2 - Electromagnetic relay - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay, and more particularly, to an electromagnetic relay having an improved movable part.

[0002]

2. Description of the Related Art Conventionally, such an electromagnetic relay, particularly a flexure type electromagnetic relay, has an iron core at the center of a spool around which a coil is wound, and a movable spring having movable contacts is mechanically fixed to an armature. . In addition, a fixed terminal having a fixed contact is disposed at a position sandwiching the movable contact provided at the tip of the movable spring. Therefore, since the armature is attracted to the iron core by driving the coil, the movable contact and the fixed contact are generally closed or opened.

[0003]

The above-described conventional electromagnetic relay generates vibration when the movable contact comes into contact with the fixed contact when the relay is turned off, and the vibration is directly transmitted to the armature. There is a disadvantage that it becomes larger.

[0004] An object of the present invention is to provide an electromagnetic relay that reduces vibration noise at the time of OFF based on the movable contact and the fixed contact.

[0005]

The electromagnetic relay according to the present invention comprises:
A part of a movable contact spring that has a movable contact and is mechanically fixed to an armature facing the iron core, and has a protrusion formed symmetrically perpendicular to the axial direction of the movable contact spring, wherein the protrusion is The armature is configured to contact the armature when the armature is restored, and to be separated from the armature when the armature is operated.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B show a movable contact spring in an electromagnetic relay for explaining an embodiment of the present invention, wherein FIG. 1A is a plan view and FIG. FIG. 1 (a),
As shown in (b), in the present embodiment, a part of the movable contact spring 2 provided with the movable contact 4 at the tip thereof and bent at a position orthogonal to the axial direction into a substantially rectangular shape having a smaller width than the armature 1. The projection 3 is formed. The movable contact spring 2 is mechanically fixed to the armature 1 by a circular boss 5, and the protrusion 3 is in contact with the armature 1 in a non-operation state, and the protrusion 3 is in an operation state in which the armature 1 is attracted to the iron core.
Moves away from armature 1.

FIG. 2 is a transition diagram of the electromagnetic relay movable portion for explaining the operation of the movable contact spring shown in FIG. As shown in FIG. 2, when the relay is turned on in (a), the core 6 attracts the armature 1 by energizing the coil 7 wound around the spool 8. At this time, the movable contact 4 formed at the tip of the movable spring 2 separates from the fixed contact 10A and contacts the fixed contact 10B formed on the fixed terminal 9, so that the protrusion 3 separates from the surface of the armature 1. Next, when the relays of (b) and (c) are turned off and completely turned off, the relay O
The clearance between the armature 1 and the protruding portion 3 which is bent into a substantially rectangular shape which occurs at the time of N is eliminated. That is, the relay O
At the time of FF, the protrusion 3 and the armature 1 come into contact with each other and then come into a press-contact form. Thereby, the vibration of the movable contact spring 2 can be suppressed, and the vibration noise can be reduced.

3A and 3B show a movable contact spring in an electromagnetic relay for explaining another embodiment of the present invention, wherein FIG. 3A is a plan view and FIG. 3B is a front view. FIG.
As shown in (a) and (b), in this embodiment, as compared with the above-described embodiment, a part of the movable contact spring 2 provided with the movable contact 4 at the tip is symmetrically orthogonal to the axial direction. The difference is that the provided substantially rectangular projection 11 is formed longer than the width of the armature 1, and the other portions are the same. The operation of the movable contact spring 2 is the same as the operation in FIG. 2, and the vibration noise is also reduced.

[0010]

As described above, the electromagnetic relay according to the present invention is provided with a substantially V-shaped protruding portion that presses against the armature on a part of the movable contact spring, so that when the movable contact comes into contact with the break contact when turned off. Since vibration can be suppressed, there is an effect that vibration noise can be reduced.

[Brief description of the drawings]

FIGS. 1A and 1B show a movable contact spring in an electromagnetic relay for explaining an embodiment of the present invention, wherein FIG. 1A is a plan view and FIG.

FIG. 2 is a transition diagram of a movable portion of an electromagnetic relay for explaining an operation of the movable contact spring shown in FIG.

FIGS. 3A and 3B show a movable contact spring in an electromagnetic relay for explaining another embodiment of the present invention, wherein FIG. 3A is a plan view and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Armature 2 Movable contact spring 3, 11 Projection 4 Movable contact 5 Circular boss 6 Iron core 7 Coil 8 Spool 9 Fixed terminal 10A, 10B Fixed contact

 ──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-63-129940 (JP, A) JP-A-60-88450 (JP, U) JP-A-62-88338 (JP, U) 87351 (JP, U) Japanese Utility Model 3-91648 (JP, U) Japanese Utility Model 2-34055 (JP, U) Japanese Utility Model Application Showa 60-168242 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A movable contact spring having a movable contact and mechanically fixed to an armature facing an iron core, and having a protrusion formed symmetrically perpendicular to the axial direction of the movable contact spring. An electromagnetic relay, wherein the protrusion contacts the armature when the armature is restored, and separates from the armature when the armature operates. 2. The electromagnetic relay according to claim 1, wherein the protrusion has a substantially rectangular structure.