JPH0652773A - Armature of electromagnetic relay and its manufacture - Google Patents

Abstract

PURPOSE:To sufficiently utilize the function of a residual plate and stabilize the operating characteristic of an electromagnetic relay by providing the residual plate curved nearly in L-shape to cover an edge part on a contact top end part to be touched and separated. CONSTITUTION:Between fixed iron cores 1, 1 extended from a coil block, a permanent magnet is arranged, and a armature 2 is provided with a movable contact spring 7. The armature 2 has a residual plate 3 curved nearly in L-shape to cover an edge part 2a on the top end part. The residual plate 3 is formed nearly in L-shape in this way to cover the edge part 2a on the top end part of the armature 2, and the armature 2 makes contact with the fixed iron cores 1 through the residual plate 3, and a gap G having the same thickness as the residual plate 3 can be formed. Therefore, the relay characteristics of the armature 2, not to mention return characteristic, can be stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature for an electromagnetic relay and a method for manufacturing the armature, and more particularly, it is made of a non-magnetic material such as a thin metal plate for forming a gap between the armature and a fixed iron core. The present invention relates to a technique for stabilizing a return characteristic of an armature by the residual plate by making a gap between the armature and a fixed iron core as a predetermined size by the residual plate.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a armature 2 which is swung with respect to a fixed iron core 1 of an electromagnetic relay and is brought into contact with and separated from the fixed iron core 1 is provided with a resilient plate 3 at its tip. While the swinging armature 2 is magnetically attached to the fixed iron core 1, a gap G is formed between the armature 2 and the fixed iron core 1 in the residual plate 3 to restore the armature 2. It is intended to stabilize the operation and the characteristics of the electromagnetic relay.

[0003]

However, in the case of such a structure, as shown in FIG. 4A, when the welding position of the residual plate 3 is displaced so as to be pulled in from the tip, the armature 2 And the fixed iron core 1 come into direct contact with each other, resulting in poor responsiveness when the armature 2 is restored, resulting in poor restoration characteristics. Then, as shown in FIG. 4B, when the residual plate 3 protrudes from the tip of the armature 2 and is welded, the residual plate 3 hits the fixed iron core 1, and the gap G becomes too large. There is a problem that the operating characteristics of the electromagnetic relay are impaired. Then, when using the metal processing jig J to bend the residual plate 3 along the distal end portion of the armature 2, as shown in FIG. The jig J may come into strong contact with the residual plate 3 and the welding of the residual plate 3 may come off.

The present invention is intended to solve such a problem, and an object of the present invention is to arrange a resistor plate between the armature and the fixed iron core by aligning it with the tip of the armature. It is an object of the present invention to provide an armature of an electromagnetic relay that can form a predetermined gap and stabilize the operating characteristics of the electromagnetic relay by making full use of the function of the residual plate, and a method of manufacturing the same.

[0005]

According to the present invention, there is provided an armature 2 which is oscillated with respect to a fixed iron core 1 of an electromagnetic relay so as to come into contact with and separate from the fixed iron core 1. It is characterized in that it is formed by additionally attaching a rescue plate 3 which is bent in a substantially L shape so as to cover the.

[0006] Further, after the flat plate-shaped residual plate 3 is welded to the armature 2, the resilient plate 4 is bent through the elastic member 4 so as to be along the tip of the armature 2. To do.

[0007]

The function of the resilient plate 3 is that it is formed in a substantially L-shape to cover the edge portion 2a of the tip of the armature 2 and the armature 2 abuts on the fixed iron core 1 via the resilient plate 3 A gap G having the same thickness as the dual plate 3 is formed. It stabilizes not only the return characteristic of the armature 2 but also the relay characteristic.

Further, when the resilient plate 3 is bent, it is possible to prevent the elastic member 4 from being deformed and strongly pressing the portion of the resilient plate 3 protruding from the armature 2 so that the welding of the resilient plate 3 can be performed. Avoid falling off. The residual plate 3 is satisfactorily bent along the tip of the armature 2.

[0009]

FIG. 3 shows an overall view of an electromagnetic relay in which a permanent magnet 6 is disposed between fixed iron cores 1 and 1 extending from a coil block 5, and an armature 2 is provided above the permanent magnet 6. Is provided so as to be swingable, a movable contact spring 7 is attached to the armature 2, a movable contact 8 is attached to the movable contact spring 7, and the direction of energization of the coil via the coil terminals 9 and 9 is By switching, the armature 2 is oscillated by the seesaw, and the movable contact 8 is opened and closed with respect to the fixed contacts 10 and 10 to constitute a polarized electromagnetic relay. In the figure, 11 is a relay terminal. The design of such a polarized electromagnetic relay can be changed in various ways.

The armature 2 has an edge portion 2 at the tip end.
A reciprocal plate 3 bent in a substantially L shape is attached so as to cover a. In this way, the residual plate 3 is formed in a substantially L shape and covers the edge portion 2a of the tip end of the armature 2, and the armature 2 abuts on the fixed iron core 1 via the residual plate 3, The gap G can be formed according to the thickness of the residual plate 3, and the relay characteristic as well as the return characteristic of the armature 2 can be stabilized. Then, in order to attach the residual plate 3 to the armature 2, after the flat-shaped residual plate 3 is welded to the armature 2, the residual plate 3 is connected via the elastic member 4 such as urethane rubber. The bending process is performed along the tip of the pole piece 2. Also, Resume Plate 3
Is projected about 0.1 mm from the armature 2 and is bent at such a place. As the electromagnetic relay becomes smaller, it becomes more difficult to attach the residual plate 3 to the armature 2 with high accuracy, and By projecting the reluctance plate 3 from the armature 2 and bending such a portion, the edge part 2a of the armature 2 is covered with the reciprocal plate 3, and the dimension of the gap G by the rection plate 3 is predetermined. It can be done on the street. Further, the residual plate 3 may be embedded in the recess 12 of the armature 2.

[0011]

As described above, the present invention is an armature which is oscillated with respect to a fixed iron core in an electromagnetic relay so as to come into contact with and separate from the fixed iron core, and the armature covers the edge portion of the tip end portion. Since the reciprocal plate bent in a substantially L shape is attached, the reciprocal plate is formed in a substantially L shape and covers the edge portion of the tip end of the armature, and the armature is There is an advantage that a gap can be formed in contact with the fixed iron core according to the thickness of the residual plate, and the relay characteristic as well as the return characteristic of the armature can be stabilized.

In addition, after the flat plate-shaped resume plate is welded to the armature, the plate is bent along the tip of the armature through the elastic member. , It is possible to prevent the elastic member from being deformed and pressing the reluctant plate portion projecting from the armature strongly, so that the welding of the reciprocal plate can be prevented from coming off, and the reciprocal plate is guided along the tip of the armature. As described above, there is an advantage that it can be favorably bent.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention.

FIG. 2 shows the manufacturing method of the above, and (a), (b) and (c) are process drawings.

FIG. 3 shows an electromagnetic relay of the above, (a) is a plan view,
(B) is a sectional view.

FIG. 4 shows a conventional example, and (a) and (b) are explanatory views showing the problems.

FIG. 5 shows the above manufacturing method, and FIGS. 5 (a) and 5 (b) are process drawings.

[Explanation of symbols]

 1 Fixed iron core 2 Armature 2a Edge part 3 Resilient plate 4 Elastic member

Claims (2)

[Claims] 1. An armature that is swung with respect to a fixed iron core of an electromagnetic relay and is brought into contact with and separated from the fixed iron core, and the armature is bent in a substantially L shape so as to cover an edge portion of a tip end portion. An armature for an electromagnetic relay, characterized in that it is provided with an additional resistive plate. 2. A contact for an electromagnetic relay, characterized in that, after a flat plate-shaped residual plate is welded to an armature, the resilient plate is bent along an end of the armature through an elastic member. Method of manufacturing a pole.