JPH05314885A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To prevent disconnection and layer shortcircuiting, etc., of a coil during integral molding process by winding a heat resistant tape in advance onto the surface of the coil of a coil block body, and integrally molding the coil block body and an insulator base. CONSTITUTION:The coil terminal 2b of a coil spool 2c and a coil outlet terminal 1d are welded at their opposite surfaces to each other and the coil spool 2c is fixed on a terminal blank 100. In the coil spool 2c a U-shaped iron core 2a and a coil terminal 2b are integrally molded by an insulator, and a coil 2d is wound and a heat resistant tape 2e is further wound thereon so that a coil block body 2 is completed. Next, both end ptions of the U-shaped iron core 2a and a hole 3a for inserting a permanent magnet are exposed and are covered with an insulator 3b so as to manufacture an insulator base 3. Then a permanent magnet is inserted into the hole portion 3a and is fixed there and a movable contact spring block is mounted on the insulator base 3 and finally a cover is mounted so that assembling of an electromagnetic relay is completed.

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 insulating structure for a coil block body.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic relay provided with such a coil block body has a movable contact spring block in which the coil block body is housed in an insulator base, a permanent magnet is mounted, and then the upper surface of the permanent magnet is used as a fulcrum. It is equipped with.

FIG. 2 is an exploded perspective view of an electromagnetic relay showing such a conventional example. As shown in FIG. 2, the conventional electromagnetic relay has an insulator base 3 in which a U-shaped iron core 2a is mounted, a coil block body in which a coil is wound is housed, and an insulator 3b is integrally molded, and the coil block body. The permanent magnet 5 inserted into the magnet insertion hole 3a formed in
A movable contact spring 4c having a movable contact 4c at its tip,
The movable contact spring block 4 is formed by integrally molding the hinge spring 4e with the insulating fixed body 4b, and a cover (not shown). The coil block body housed in the insulator base 3 of the electromagnetic relay includes a fixed terminal 1d connected to the fixed contact 1, a coil conductor terminal 1b, and a neutral terminal 1c.
And are bent downward from the insulator 3b and led out.

FIGS. 3A and 3B are perspective views of the insulator base shown in FIG. 2 before and after integral molding. Figure 3 (a)
As shown in FIG. 1, first, with respect to the coil block body 2, the coil terminal 2b of the coil spool 2c and the coil lead-out terminal 1d.
The opposing surfaces of are fixed by welding or the like. This allows
Fixed terminal 1b, neutral terminal 1c, and coil lead-out terminal 1d
The coil spool 2c is fixed on a strip-shaped terminal blank 100 obtained by punching a strip-shaped thin leaf spring including the respective terminals by press working or the like. In this coil spool 2c, a U-shaped iron core 2a and a coil terminal 2b are integrally molded by an insulator,
By winding the coil 2d, the coil block body 2
Is completed. Incidentally, 3a is a hole for inserting a magnet.

Next, as shown in FIG. 3 (b), the assembly consisting of the terminal blank 100 and the coil block body 2 comprises a U-shaped iron core 2a having both ends and a permanent magnet insertion hole 3 formed therein.
a is exposed and covered with an insulator 3b. As a result, the coil block body 2 is completely housed in the insulator 3b, and the fixed terminal 1b, the neutral terminal 1c, and the coil lead-out terminal 1d are also integrated to form the insulator base 3.

When the insulator base 3 is formed in this manner, the permanent magnet 5 is inserted into the permanent magnet insertion hole 3a provided in the center of the insulator base 3 as shown in FIG. To fix. Further, the movable contact spring block 4 is attached to the insulator base 3 by fixing the hinge spring portion 4e and the neutral terminal 1c in the movable contact spring block 4. Finally, a cover (not shown) is attached to complete the assembly of the electromagnetic relay.

[0007]

In the structure of the conventional electromagnetic relay described above, when the insulator base and the coil block body are integrally molded with the material of the insulator base, the coil body is subjected to excessive heat and molding. Therefore, there is a drawback that the problem of coil breakage or rare short circuit occurs.

An object of the present invention is to provide an electromagnetic relay capable of eliminating such coil disconnection and rare short circuit.

[0009]

The electromagnetic relay of the present invention comprises:
A coil block body in which a coil is wound around a coil spool in which a U-shaped iron core and a coil terminal are integrally molded with an insulator, and a permanent magnet arranged in the central portion of the U-shaped iron core,
An armature arranged so that both ends thereof are opposed to both end faces of the U-shaped core, and a hinge spring part for supporting a tilting motion in which both ends of the armature come into contact with and separate from both end faces of the U-shaped core. A movable contact spring block, which is integrally formed of an insulator with a movable contact spring having a movable contact at its tip, which is interlocked with the tilting movement of the armature, and a fixed terminal provided with a fixed contact opposed to the movable contact. An insulator base integrally molded with an insulator so as to implant a neutral terminal connected to one end of the hinge spring portion and a coil lead-out terminal connected to the coil terminal, wherein the insulator base is the coil. When the block body is integrally molded so as to be covered with the insulating material and is housed inside, the coil body is wound in advance with a heat resistant tape and then integrally molded.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. 1A and 1B are perspective views before and after integral molding of an insulator base in an electromagnetic relay for explaining an embodiment of the present invention. As shown in FIG. 1A, this embodiment is similar to the conventional example of FIG. 2 described above in terms of the structure of the electromagnetic relay, but the coil spool 2c.
It is different in that the coil block body 2 is formed by further winding a heat-resistant tape 2e around the coil wound around. That is,
The opposing surfaces of the coil terminal 2b of the coil spool 2c and the coil lead-out terminal 1d are fixed by welding or the like. As a result, the coil spool 2c is fixed onto the strip-shaped terminal blank 100 obtained by punching a strip-shaped thin leaf spring including the fixed terminal 1b, the neutral terminal 1c, and the coil lead-out terminal 1d by press working or the like. In this coil spool 2c, a U-shaped iron core 2a and a coil terminal 2b are integrally molded with an insulator, a coil 2d is wound, and a heat-resistant tape 2e is further wound to complete the coil block body 2. Note that the other configurations are the same as the configurations of FIGS. 3A and 3B described above.

Next, as shown in FIG. 1 (b), the assembly consisting of the terminal blank 100 and the coil block body 2 comprises a U-shaped iron core 2a having both ends and a permanent magnet insertion hole 3 formed therein.
a is exposed and covered with an insulator 3b. As a result, the coil block body 2 is completely housed in the insulator 3b, and the fixed terminal 1b, the neutral terminal 1c, and the coil lead-out terminal 1d are integrally molded to obtain the insulator base 3.

When the insulator base 3 is formed in this manner, the permanent magnet 5 is provided in the center of the insulator base 3 and the permanent magnet insertion hole 3a is formed in the center of the insulator base 3, as in the conventional example shown in FIG. Insert and fix. Further, the movable contact spring block 4 is attached to the insulator base 3 by fixing the hinge spring portion 4e of the movable contact spring block 4 and the neutral terminal 1c. Finally, a cover (not shown) is attached to complete the assembly of the electromagnetic relay.

[0013]

As described above, according to the present invention, the coil body is integrally molded by winding the heat resistant tape around the coil body and integrally molding the insulator base and the coil block body with the material of the insulator base. There is an effect that it is possible to protect from a thermal stress and a molding pressure at the time of carrying out, and to prevent a coil disconnection and a rare short circuit.

[Brief description of drawings]

FIG. 1 is a perspective view before and after integral molding of an insulator base in an electromagnetic relay for explaining an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an electromagnetic relay showing a conventional example.

FIG. 3 is a perspective view of the insulator base shown in FIG. 2 before and after integral molding.

[Explanation of symbols]

 1a Fixed contact 1b Fixed terminal 1c Neutral terminal 1d Coil lead-out terminal 2 Coil block body 2a U-shaped iron core 2b Coil terminal 2c Coil spool 2d Coil 2e Heat resistant tape 3 Insulator base 3a Magnet insertion hole 3b Insulator 4 Moving contact spring Block 4a Armature 4b Insulation fixed body 4c Moving contact spring 4d Moving contact 4e Hinge spring 5 Permanent magnet 100 Terminal blank

Claims (1)

[Claims] 1. A coil block body in which a coil is wound around a coil spool in which a U-shaped iron core and a coil terminal are integrally molded with an insulator, a permanent magnet arranged in a central portion of the U-shaped iron core, and the U-shaped. An armature arranged so that both ends face each other on both end faces of the iron core, and a hinge spring part supporting the tilting motion in which both ends of the armature come into contact with and separate from both end faces of the U-shaped iron core, and the armature. Movable contact spring block, which is integrally molded with an insulator, in association with the tilting movement of the movable contact spring and has a movable contact at the tip, a fixed terminal having a fixed contact arranged facing the movable contact, and the hinge spring. A neutral terminal connected to one end of the section and a coil lead-out terminal connected to the coil terminal, and an insulator base integrally molded with an insulator so as to be implanted, the insulator base including the coil block body. Insulation An electromagnetic relay characterized in that, when the coil body is housed inside by being integrally molded so as to be covered with a body material, the coil body is previously wound with a heat resistant tape and then integrally molded.