JP2569109Y2 - 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 for high withstand voltage.

[0002]

2. Description of the Related Art Conventionally, such electromagnetic relays for high withstand voltage have been
The coil assembly and the armature assembly are mounted on a substantially U-shaped base on which various contact terminals are implanted, and the cover is covered.

FIG. 4 is an exploded perspective view of an electromagnetic relay showing an example of such a prior art. As shown in FIG. 4, the conventional electromagnetic relay is composed of a coil assembly 1A, a substantially U-shaped contact terminal assembly 21 which incorporates the coil assembly 1A therein and press-fits and supports it, and a spool 2A of the coil assembly 1A. The armature assembly 20 is fitted and supported on one side and operates the movable spring 24 of the contact terminal assembly 21, and the cover 26. The coil assembly 1A includes a front outer flange 3
A spool 2A having an outer flange 5 on the rear side, a coil 7 wound on the spool 2A, an insulating tape 16 further wound thereon, an iron core 14 pressed into the spool 2A, A yoke 13 fixed to one end is provided. An L-shaped support portion 10 is formed on the front flange 3, and a block of a coil terminal 9 around which the coil lead wire 8 is wound is formed on the rear flange 5. The contact terminal assembly 21 includes a substantially U-shaped base 22 that press-fits and supports the coil assembly 1A, a fixed contact terminal 23 that is implanted in a parallel portion of the substantially U-shaped base 22, and has a contact on the inside of the distal end portion. And a movable spring support terminal 25 that supports the spring 24. Further, the armature assembly 20 includes the coil assembly 1
It comprises a card block 19 supported by an L-shaped support portion 10 attached to the outer flange 3 in front of the A spool 2A, and a magnet 18 and a plate piece 17 incorporated in the card block 19.

FIGS. 5A and 5B are a side sectional view and a front sectional view of the electromagnetic relay shown in FIG. 4, respectively. As shown in FIGS. 5A and 5B, a coil 7 is wound around a spool 2A constituting a coil assembly 1A of the relay, and an insulating tape 16 is wound thereon.
A minute gap 27 is formed between the insulating tape 16 and the front flange 3 and the rear flange 5 of the spool 2A.

[0005]

SUMMARY OF THE INVENTION The above-mentioned conventional electromagnetic relay is provided between an insulating tape covering a coil of a coil assembly and a first (front) outer flange and a second (rear) outer flange. In this case, a short gap occurs between the coil and the yoke and between the coil and the movable spring when a high voltage is applied, so that a withstand voltage between the coil and the contact cannot be secured.

An object of the present invention is to provide an electromagnetic relay capable of ensuring a withstand voltage between such a coil and a contact.

[0007]

The electromagnetic relay according to the present invention is:
A coil assembly having an iron core, a yoke, and a spool wound with a coil, and a fixed contact terminal and a movable spring on a parallel surface of a substantially U-shaped base for press-fitting and supporting the coil assembly so as to face the coil assembly. A contact terminal assembly having a connected movable spring support terminal implanted therein; a card block fitted and supported at one end of the spool of the coil assembly and operating a movable spring of the contact terminal assembly; and fixed to the card block. An armature assembly having a magnet and a plate piece, and an electromagnetic relay having a cover, wherein the spool of the coil assembly forms inner and outer flanges at both ends, respectively, and fits into a gap between the inner and outer flanges , It is provided with side walls formed on both sides and a coil cover divided into two to cover the entire coil. Further, the coil relay in the electromagnetic relay of the present invention.
Bars are the lead wire of the coil and the coil end, respectively.
A cover piece is provided at a position corresponding to the upper part of the
You.

[0008]

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

FIG. 1 is an exploded perspective view of a coil assembly of an electromagnetic relay for explaining a first embodiment of the present invention. As shown in FIG. 1, this embodiment shows only the coil assembly 1 in the electromagnetic relay. However, the armature assembly 20 and the contact terminal assembly 21 in the conventional example shown in FIG.
And the cover 26 are the same, and therefore will not be described. That is, also in this embodiment, the coil assembly 1 and the coil assembly 1
And a substantially U-shaped contact terminal assembly (21 in FIG. 4) for press-fitting and supporting the inside, and is fitted and supported by the L-shaped holding portion 10 of the spool 2 in the coil assembly 1 and movable of the contact terminal assembly. It comprises an armature assembly (20) for operating a spring (24) and a cover (26). In the coil assembly 1 according to the present embodiment, a first outer flange 3 and a first inner flange 4 are formed at one end (front side) of a spool 2, and a second outer flange 5 and a second inner flange 6 are formed at the other end. To form In the spool 2, the coil 7 is wound between the first inner flange 3 and the second inner flange 6. In addition, the coil 7 forms side walls 12 that fit into the gap between the first outer flange 3 and the first inner flange 4 and the gap between the second outer flange 5 and the second inner flange 6 of the spool 2. Then, it is covered with the coil cover 11 divided into two. The yoke 13 is mounted in the same manner as in the conventional example.

FIG. 2 is a sectional view of the coil assembly shown in FIG. As shown in FIG. 2, in the coil assembly 1, since the coil cover 11 completely covers the coil 7, the creepage distance between the coil 7 and the movable spring (24 in FIG. 4) and the coil 7 and the yoke 13 are small. growing. Therefore, short-circuiting does not occur even at a high voltage, and the withstand voltage between the coil 7 and the contact can be maintained.

FIG. 3 is an exploded perspective view of a coil assembly in an electromagnetic relay for explaining a second embodiment of the present invention. As shown in FIG. 3, the present embodiment is different from the first embodiment shown in FIG.
The difference is that a cover piece 15 is provided at a position corresponding to the lead wire 8 of the coil 7 and the upper part of the coil terminal 9, and the other components are the same. The cover piece 15 is configured to prevent a short circuit from the lead wire 8 or the coil terminal 9 to the yoke 13, and can have a higher withstand voltage than the coil cover 11 of the first embodiment.

[0012]

As described above, the electromagnetic relay of the present invention is provided with an inner flange and an outer flange at both ends of a spool forming a coil assembly, and is fitted into a gap between two inner and outer flanges, respectively. By having the coil cover that covers the whole, there is an effect that the ability of withstand voltage between the coil and the contact point is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a coil assembly of an electromagnetic relay for explaining a first embodiment of the present invention.

FIG. 2 is a sectional view of the coil assembly shown in FIG. 1;

FIG. 3 is an exploded perspective view of a coil assembly of the electromagnetic relay for explaining a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of an electromagnetic relay showing an example of the related art.

FIG. 5 is a cross-sectional view of the electromagnetic relay shown in FIG.

[Description of Signs] 1 Coil assembly 2 Spool 3, 5 Outer flange 4, 6 Inner flange 7 Coil 11 Coil cover 12 Side wall 13 Yoke 14 Iron core 15 Cover piece 20 Armature assembly 21 Contact terminal assembly 22 Substantially U-shaped base 23 Fixed Contact Terminal 24 Movable Spring 25 Movable Spring Support Terminal 26 Cover

Claims (2)

(57) [Scope of request for utility model registration] 1. A coil assembly having an iron core, a yoke, and a spool wound with a coil, and a fixed contact on a parallel surface of a substantially U-shaped base for press-fitting and supporting the coil assembly so as to face the coil assembly. A contact terminal assembly having a movable spring support terminal connected to the terminal and the movable spring, and a card block fitted and supported at one end of the spool of the coil assembly and operating the movable spring of the contact terminal assembly. In an electromagnetic relay having an armature assembly having a magnet and a plate piece fixed to the card block, and a cover, the spool of the coil assembly forms inner and outer flanges at both ends, respectively, and a gap between the inner and outer flanges. Mating and forming side walls on both sides
Electromagnetic relay, characterized in that it comprises a and a coil cover divided into two covering the entire coil. 2. The coil cover is provided with each of the coil
To the position corresponding to the lead wire of the
The electromagnetic relay according to claim 1, further comprising a cover piece.