JP2532474Y2 - Electromagnetic relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to an electromagnetic relay, and particularly to an electromagnetic relay for high withstand voltage.

[Conventional technology]

Such a conventional electromagnetic relay for high withstand voltage is configured by fitting a coil assembly, a contact terminal assembly, and an amateur assembly and covering them with a cover.

FIG. 3 is a component assembly diagram of an electromagnetic relay showing an example of such a prior art.

As shown in FIG. 3, the conventional electromagnetic relay has a cover 1.
A coil terminal assembly 2; a substantially U-shaped contact terminal assembly 3 into which the coil assembly 2 is incorporated and press-fitted and fixed; and a contact terminal assembly fitted and supported on one side of a spool 7 of the coil assembly 2 And an armature assembly 4 for operating a movable spring 13 of the three-dimensional body 3. The coil assembly 2 includes a spool 7 having a front flange 5, a rear flange 6 and a coil terminal 19, and a coil 8 wound on the spool 7.
And an insulating tape 9 further wound thereon, and a spool 7
Core 10 press-fitted into the core and a yoke fixed to one end of the core 10
It consists of eleven. The contact terminal assembly 3 includes a substantially U-shaped base 15 for press-fitting and supporting the coil assembly 2, a fixed contact terminal 12 implanted in a parallel portion of the substantially U-shaped base 15, and having a contact on a tip end inside, and a movable contact terminal assembly 3. And a movable spring support terminal 14 for supporting the spring 13. Further, the armature assembly 4 is composed of a card block 16 supported by an L-shaped support piece attached to the flange 5 in front of the spool 7 in the coil assembly 2, a magnet 17 and a plate piece 18 incorporated in the card block 16. Made up of

4 (a) and 4 (b) are cross-sectional views of the electromagnetic relay shown in FIG. 3 in the width direction and the length direction, respectively.

As shown in FIGS. 4 (a) and 4 (b), the conventional electromagnetic relay covers a coil 8 with an insulating tape 9, and assembles a coil terminal assembly 2, a contact terminal assembly 3 and an armature assembly 4 and then a cover. 1 and resin-sealed. In such a conventional assembly, a minute gap 26 occurs between the insulating tape 9 covering the coil 8 and the front flange 5 and the rear flange 6.

[Problems to be solved by the invention]

In the above-described conventional electromagnetic relay, since a minute gap is formed between the insulating tape covering the coil and the front and rear flanges, the gap between the coil and the yoke as shown by the arrow in FIG. In addition, there is a short-circuit between the coil and the movable spring when a high voltage is applied, and 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 improving the withstand voltage between the coil and the contact.

[Means for solving the problem]

The electromagnetic relay according to the present invention has a coil assembly having an iron core, a yoke, and a spool, a substantially U-shaped base for press-fitting and supporting the coil assembly, and a parallel surface of the substantially U-shaped base facing the coil assembly. A contact terminal assembly having a potential spring, a fixed contact terminal, and a movable spring support terminal implanted in the coil assembly, and a card fitted and supported at one end of a spool of the coil assembly and operating the movable spring of the contact terminal assembly In an electromagnetic relay comprising a block, an armature assembly having a magnet and a plate piece fixed to the card block, and a cover for assembling the respective assemblies, a cover covering the assembly from above is provided on both sides of a spool of the coil assembly. An inner flange supporting the coil and an outer flange formed parallel to the outside of the inner flange and supporting the iron core are provided. Lunge and a and a coil cover for covering integrally molded across and fitted the coil in the gap of the outer flange.

〔Example〕

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

1 (a) and 1 (b) are a perspective view of a spool and a sectional view of a coil assembly in an electromagnetic relay for explaining a first embodiment of the present invention.

As shown in FIGS. 1 (a) and 1 (b), this embodiment has the same configuration as that of the conventional example shown in FIG. 3 except that the configuration of the coil assembly 2 is different. In the following, the same configuration
Description will be made with reference to the numbers in the figure.

First, in this embodiment, a cover 1, a coil assembly 2, a substantially U-shaped contact terminal assembly 3 for mounting and fixing the coil assembly 2 therein, and a spool 7 of the coil assembly 2 on one side. The movable spring of the contact terminal assembly 3 which is fitted and supported.
And an armature assembly 4 for operating the motor 13, and particularly constitutes the coil assembly 2. One end of the spool 7 has a front (first) outer flange 5 and a front (first) inner flange 20, and the other end has a rear (second) outer flange 6 and a rear (second). And (ii) an inner flange 21. Coil 8
Is wound between the front (first) inner flange 20 and the rear (second) inner flange 21, and the iron core 10 is wound around the front (first) outer flange 5 and the rear (second) It is press-fitted between the outer flanges 6. As described above, one feature of the present embodiment is that inner and outer flanges are provided at both ends of the spool 7.

Next, the coil cover 22 is placed in front of the spool 7 (first).
It is integrally molded so as to fit into the side wall 23 forming the gap between the outer and inner flanges 5 and 20 and the gap between the subsequent (second) outer and inner flanges 6 and 21 and to cover the entire coil 8. You. This is the second feature.

Accordingly, the flanges 5, 6, 20, 21 of the spool 7 are in good contact with the coil cover 22, and the creepage distances between the coil 8 and the movable spring 13 and between the coil 8 and the yoke 11 are large. There is no short circuit, and a withstand voltage between the coil 8 and the contact can be ensured.

FIG. 2 is a perspective view of a spool in an electromagnetic relay for explaining a second embodiment of the present invention.

As shown in FIG. 2, the overall structure of this embodiment is the same as that of the electromagnetic relay shown in FIG. 3, but the structure of the spool 7 constituting the coil assembly 2 is different. Hereinafter, as in the first embodiment, the same structure as that of the conventional example will be referred to the number in FIG.

This embodiment is different from the above-described first embodiment in that the coil lead wire 25 of the coil 8 and the coil terminal
The portion corresponding to 19 is also covered by integral molding, and is characterized in that lead extraction portions 24 are provided on both sides of the flange 6. In the present embodiment, the lead wire 25 and the coil terminal 19 are prevented from being short-circuited to the yoke 11, so that the withstand voltage can be made higher than the coil cover 22 of the first embodiment.
Although the first and second inner flanges 20, 21 are not shown, they are the same as in the first embodiment.

[Effect of the invention]

As described above, the electromagnetic relay of the present invention is provided with two flanges at both ends of the spool forming the coil assembly, and is fitted in the gap between the two flanges and covers the entire coil by integral molding. By providing the coil cover, the flange of the spool and the coil cover are in close contact with each other, and the creepage distance between the coil and the movable spring and between the coil and the yoke can be increased, so that the withstand voltage between the coil and the contact can be improved. effective.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (a) and 1 (b) are a perspective view of a spool and a cross-sectional view of a coil assembly of an electromagnetic relay, respectively, for explaining a first embodiment of the present invention, FIG. FIG. 3 is a perspective view of a spool in an electromagnetic relay for explaining a second embodiment of the present invention, FIG. 3 is a partial assembly view of an electromagnetic relay showing an example of the prior art, and FIGS. FIG. 4 is a cross-sectional view of the electromagnetic relay shown in FIG. 3 in a width direction and a length direction. DESCRIPTION OF SYMBOLS 1 ... Cover, 2 ... Coil assembly, 3 ... Contact terminal assembly,
4 ... Amateur assembly, 5,6 ... Outer flange, 7 ... Spool, 8 ... Coil, 9 ... Insulating tape, 10 ... Iron core, 11 ... Yoke, 12 ... Fixed contact terminal, 13 ... Movable spring, 14 ... Movable spring Support terminal, 15 ... U-shaped base, 16 ... Card block, 17
... magnet, 18 ... plate piece, 19 ... coil terminal, 20,2
1 ... inner flange, 22 ... coil cover, 23 ... side wall, 24 ... lead lead-out part, 25 ... coil lead wire, 26 ... minute gap.

Claims (2)

(57) [Scope of request for utility model registration] A coil assembly having an iron core, a yoke, and a spool; a substantially U-shaped base for press-fitting and supporting the coil assembly; and a planting surface parallel to the substantially U-shaped base facing the coil assembly. A contact terminal assembly having a possible spring, a fixed contact terminal, and a movable spring support terminal provided thereon; a card block fitted and supported at one end of a spool of the coil assembly and operating the movable spring of the contact terminal assembly; In an electromagnetic relay composed of an armature assembly having a magnet and a plate piece fixed to the card block, and a cover covering the assembly from above, coils are provided on both surfaces of a spool of the coil assembly. An inner flange for supporting and an outer flange formed parallel to the outside of the inner flange and supporting the iron core are provided. Electromagnetic relay characterized in that a coil cover for covering integrally molded across and fitted the coil in the gap of beauty outside flange. 2. The coil cover according to claim 1, wherein a lead lead portion for protecting a coil lead wire drawn from a coil of the coil assembly is provided integrally with the coil cover.
Electromagnetic relay as described.