JPH0515705Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a contact spring drive mechanism used in electromagnetic relays, etc. The purpose of this invention is to minimize the number of parts and to create a compact and ultra-thin structure. The goal is to construct it into a shape and manufacture it economically.

[Conventional technology]

As a conventional electromagnetic relay having a small and thin structure, there is a polarized electromagnetic relay invented by the applicant and disclosed in Japanese Patent Application No. 62-23519.

As shown in FIG. 3, this configuration includes a support shaft 5a provided at the center of the interior of the base block 5, and a connecting member 4 made of a permanent magnet provided at the center of the body of the armatures 2a, 2b configured in an H-shape. The shaft hole 4a is rotatably supported. By mounting the movable contact spring 11 on the armatures 2a and 2b using a support member 6 made of synthetic resin, the movable contact is opened and closed with the opposing stationary contact, and each switch is performed. is configured to take place.

However, in this contact spring mechanism,
The movable contact spring 11 is connected to the movable spring terminal 13 by a connecting member 11a made of a conductive material as means for movably supporting it. In order to link this linking part movably, it is necessary to increase the length of the spring and keep the stiffness to a minimum. Therefore, the linking part 11 is manufactured integrally with the movable contact spring 11.
A had to be bent.

[Problem that the invention seeks to solve]

Due to the movement of such an electromagnetic device, the armature 2
In the contact spring drive mechanism that rotates a and 2b in forward and reverse directions and transmits this movement to the contact spring mechanism to open and close the contacts, the shape of the above-mentioned connecting member 11a is complicated and bending process is required. Not only does this require high costs, but the bending process makes it difficult to achieve dimensional accuracy, and the contact spring system is subject to large variations due to deformation due to handling, making it difficult to achieve high sensitivity in electromagnetic relays. There was an inconvenience.

[Means for solving problems]

In order to eliminate these drawbacks, the present invention takes into consideration the component parts for electrically connecting the movable contact spring 11 to the movable spring terminal 13, and facilitates the manufacture and assembly of the parts, thereby creating a cheaper electromagnetic relay. The purpose is to provide the following.

[Function and Examples]

Hereinafter, the present invention will be explained in detail based on the drawings. Fig. 1 is an exploded perspective view of an electromagnetic relay showing an embodiment of the present invention.

In the figure, reference numeral 1 denotes a U-shaped iron core, and side surfaces 1a at both ends thereof are formed as magnetic pole surfaces facing armatures 2a and 2b. 2 is an armature block in which a pair of plate-shaped armatures 2a and 2b are arranged in parallel;
A connecting member 4 made of a permanent magnet is attached to the lower central part of the connecting member 4.
The connecting member 4 is integrally constructed in an H shape, and a shaft hole 4a is provided in the center of the connecting member 4. 5 is a base block made of synthetic resin, and a support shaft 5b is provided protruding from the center of a recess 5a. This support shaft 5b is inserted through the shaft hole 4a provided in the connecting member 4 of the armature block 2, and is rotatably supported. After that, when the iron core 1 with the coil 3 wound thereon is fitted into the recess 5a of the base block 5 and fixed, the armatures 2a and 2b are rotated to attract or repel each magnetic pole surface 1a of the iron core 1. It happens. A fixed contact spring 12 is insert molded into the base block 5.

A connecting portion 11a is provided at the lower center of the movable contact spring 11.
and the fixed part 1 which is welded and fixed to the movable spring terminal 13.
1b, and the movable contact spring 11 is fixed to the upper part 13a of a movable spring terminal 13 insert-molded in the base block 5.

Reference numeral 15 designates a drive card having a through hole 15a which is slidably fitted into the protrusions 2a' and 2b' provided on the armatures 2a and 2b, and a part 15a which is fitted into the upper central part of the movable contact spring 11. They may be connected by engaging with each other, and the drive card 15 may be fixed to the movable contact spring 11 with an adhesive if necessary.

Now, when a current is passed through the coil 3, a magnetic flux is generated on each magnetic pole surface 1a of the iron core 1 in such a state that the armatures 2a, 2b are attracted or repelled, and this causes the armature block 2 to rotate, and the armatures 2a, 2b to be repelled. Since the movable contact spring 11 is connected to the movable contact spring 11 via the drive card 15, the movable contact is opened and closed with the opposing fixed contact, and the respective contacts are switched.

That is, in the conventional movable contact spring mechanism shown in FIG. 3, the movable contact spring 11 is integrally fixed to the armatures 2a and 2b via the support member 6,
Since the contact rotates around the center, the sliding movement of the contact is large.
As a result, there was a drawback that the contacts were considerably worn out. On the other hand, the operation of the movable contact spring mechanism of the present invention is such that when the armatures 2a, 2b rotate around the support shaft 5b, the armatures 2a, 2b rotate through the insertion hole 15a of the drive card 15, which is passed through the armatures 2a, 2b. While moving inside the drive card 15, the movable contact spring 11
Since the movable contact spring 11 connected to the movable contact spring 11 is also rotated to open and close the contact, the sliding movement of the contact is extremely small.

[Effect of idea]

The present invention having the above configuration has the following effects.

(1) Since the movable contact spring and armature are linked via the drive card, the sliding movement of the contacts is extremely small.

(2) The movable contact spring mechanism is constructed from molded parts that can be mass-produced by eliminating component parts that require bending, making it easy to manufacture and inexpensive.

(3) It is difficult to achieve dimensional accuracy for parts that require bending, and the contact spring system has large variations, but this inconvenience has been completely eliminated.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing an embodiment of the present invention, in which figure a is a plan view and figure b is a front view. FIG. 3 shows a conventional electromagnetic relay, in which figure a is a plan view and figure b is a front view. 2 is an armature block, 2a, 2b are armatures, 5
1 is a base block, 5b is a support shaft, 11 is a movable contact spring, 12 is a fixed contact spring, 13 is a movable spring terminal, and 15 is a drive card.

Claims (1)

[Scope of utility model registration request] In a contact spring drive mechanism in which a rotatable armature whose central portion is pivotally supported by a base block, a movable contact spring whose central portion is pivotally supported, and a contact spring drive mechanism that connects these through a drive card, an insert provided in the drive card is provided. A contact spring drive mechanism, characterized in that the armature is slidably engaged in the hole, and the other drive card is fixed so as to rotate about a central portion of the movable contact spring as a support shaft.