JPH03230442A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To reduce the quantity of a seal material and prevent the occurrence of a functional failure by fixing an insulator base and a coil spool with the seal material infiltrating when the opening section of a cover is sealed. CONSTITUTION:A coil assembly 1 has a coil spool 8 integrally fixed with a permanent magnet 24 and an iron core 9. The flange section 11 of the assembly 1 is formed into a shape along the inner wall of an insulator base 3, a notch 14 is formed at the center of its lower section, projections 12 are provided on both ends, and a groove 13 is provided on a collar section. A reference base 19 corresponding to the notch 14 is provided on the inner bottom of the base 3, and hole sections 20 penetrated to the outside are formed on both ends. The assembly 1 is pressed and coupled into the base 8, an armature assembly 2 is mounted, and a cover 22 is covered. When the opening section of the cover 22 is sealed with a seal material, the base 3 and the spool 8 are fixed by the seal material infiltrating through the hole sections 20 of the base 3. The seal material is stopped by the groove 13 at the position before a winding section, thus the quantity of the seal material is reduced, and the breakage of the winding section and a functional failure can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic appliance having a structure in which a coil assembly and an armature assembly are mounted on an insulator base.

[Conventional technology]

Conventionally, in this type of electromagnetic relay, a coil assembly made to match the shape of the inner wall of an insulator base having a hole penetrating the outer surface is inserted into the insulator base, and the coil assembly is inserted into the insulator base. The structure is such that the coil assembly and the base are fixed together by allowing the sealant filled from the bottom surface to enter through the through hole of the base.

FIG. 6 is an enlarged view of the flange in a state in which the insulator base and the coil assembly are fitted to each other to explain an example of such a conventional method.

As shown in FIG. 6, the insulator base 3 covered with a cover 22 fixes the flange portion 11 of the spool having the winding 15 with a sealant 23. That is, the sealant 23 injected from the bottom through-hole of the insulator base 3 reaches even the winding 15 .

[Problem to be solved by the invention]

In the conventional electromagnetic relay described above, since the coil assembly and the insulator base are fixed using a sealant, it is necessary to infiltrate a considerable amount of the sealant into the interior of the relay through the hole in the bottom of the base. On the other hand, the sealant that has entered the inside passes through the flange portion of the coil assembly and enters the winding portion. As a result, under changes in the surrounding environment, especially at high temperatures or high humidity, the difference in thermal expansion coefficients between the sealant and the windings may cause the windings to break, or when the windings are energized. There is a drawback that the winding portion not only generates heat and generates malignant gas from the sealant, but also causes contact failure.

An object of the present invention is to provide an electromagnetic relay that can reduce the amount of sealant and prevent functional failure even under high temperature and high humidity conditions.

[Means to solve the problem]

The electromagnetic relay of the present invention includes a U-shaped iron core around which a coil is wound, a permanent magnet arranged such that a magnetic pole contacts the iron core, and a coil spool that integrally fixes the permanent magnet and the iron core. an assembly; an armature disposed such that both ends thereof face both ends of the iron core; a hinge spring portion supporting a seesaw action in which both ends of the armature contact and separate from both ends of the iron core; The armature assembly has a movable contact spring that is interlocked with the see-saw movement of the armature and is integrally fixed with an insulator, and has a box shape with an opening at the top and a hole at the bottom, and the coil assembly is placed in the opening. a fixed contact terminal having a fixed contact facing a movable contact of the movable contact spring when the armature assembly is disposed such that the permanent magnet serves as a fulcrum for seesaw movement of the armature; an insulator base on which a neutral terminal connected to one end of the hinge spring part forming the assembly is implanted, and the insulator base on which the coil assembly and the armature assembly are disposed are covered. a cover, a groove is formed in a portion of the coil spool that faces the insulator base, and when the opening of the cover is sealed with a sealant, the groove is formed in the bottom hole of the insulator base. The intruded sealant is configured to secure the insulator base and the coil spool of the coil assembly.

That is, a hole is formed on the bottom surface of the insulator base through which a sufficient amount of sealant can enter to fix the coil assembly and the insulator base, and a hole is formed in the flange of the coil assembly to allow the sealant to enter. The reason is that a groove is formed to stop the flow.

〔Example〕

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

1 is an exploded perspective view of an electromagnetic relay showing a first embodiment of the present invention, a second embodiment (21 is a perspective view of the electromagnetic relay shown in FIG. ) and (b) are the plan view of the insulator base shown in Fig. 1 and its A
-A sectional view. Below, Figures 1 to 3 (a), (
This will be explained with reference to b).

As shown in FIGS. 1 to 3(a) and (b), this embodiment is comprised of a coil assembly 1, an armature assembly 2, an insulator base 3, and a cover 22. As shown in FIGS. In particular, the coil assembly 1 includes a spool 8 having flanges 11 at both ends and a hole 10 in the center for inserting a permanent magnet 24, and a U-shaped iron core passing through the spool 8. The flange portion 11 has a protruding portion 12 and a notch portion 14 at the bottom thereof, and a groove portion 13 at the lower portion of the side surface. Also,
An armature assembly 2 mounted on the top surface of this coil assembly 1
is an armature 4, a movable contact spring 6, a hinge spring 7,
It has an insulator 5 that integrally supports these. Furthermore, the insulator base 3 includes a base 16 which is open at the top, has a hole 20 formed in the bottom surface for injecting a sealant, and has a reference base 19 that extends to a part of the inner wall.
6. The coil terminal 17. It has a contact terminal 18 and a neutral terminal 21.

In the electromagnetic relay having such a shape, the flange portion 11 of the coil assembly 1 has a shape that follows the inner wall of the insulator base 3, and as described above, the lower part of the flange portion 11 has a notch 14 in the center. It has a protrusion 12 at both ends and a groove 13 at the collar. Further, on the inner bottom of the insulator base 3, a reference base 1 corresponding to the notch 14 of the coil assembly 1 is provided.
A hole 20 penetrating to the outside is formed at both ends thereof. The coil assembly 1 is press-fitted into the insulator base 3, the armature assembly 2 is mounted, and the cover 4 is placed over it to construct the electromagnetic relay shown in FIG. 2.

FIG. 4 is an enlarged view of the flange in a fitted state between the insulator base and the coil assembly shown in FIG. 1.

As shown in FIG. 4, after the coil assembly 1 and the armature assembly 2 are mounted on the insulating base 3 described above, the outer bottom surface of the insulating base 3 and the opening periphery of the cover 4 form a The recess is filled with an insulating resin sealant 23, and at this time the sealant 23 enters the inside of the insulator base 3 through the hole 20 formed on the bottom surface of the insulator base 3. After this sealant 23 is cured, it fixes the base 3 and the coil assembly 1, but it stops at the rectangular groove 13 formed on the side surface of the flange 11 forming the coil assembly 1, and the sealant 23 fixes the base 3 and the coil assembly 1. The sealant 23 does not enter the portion 15.

In this way, the sealant 23 fixes the insulator base 3 and the coil assembly 1, but since it does not touch the winding part 15, it is possible to not only reduce the amount of the sealant 23 but also to prevent high temperatures and Even under high humidity conditions, it is possible to prevent disconnection of the winding, generation of gas from the sealant, and contact failure.

FIG. 5 is an enlarged view of a flange similar to FIG. 4 for explaining a second embodiment of the present invention.

As shown in FIG. 5, this embodiment has a flange portion 1 of a spool having a winding 15, compared to the first embodiment described above.
The difference is that the groove shape of the groove part 1 is a triangular groove 13, but the other structures are the same. In this case as well, the sealant 2 is injected from the bottom hole of the insulator base 3 covered with the cover 22.
3 can be stopped by the triangular groove 13 of the flange portion 11 and will not reach the winding 15.

〔Effect of the invention〕

As explained above, in the electromagnetic relay of the present invention, by providing the groove at the bottom of the flange of the coil assembly, the sealant that has entered through the hole at the bottom of the insulator base can be stopped before the winding. In addition to reducing the amount of sealant, it is possible to prevent winding breakage and contact failure even under changes in the surrounding environment, particularly at high temperatures or high humidity, and to prevent the generation of malignant gases.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an electromagnetic relay showing the first embodiment of the present invention, Fig. 2 is an assembled perspective view of the electromagnetic relay shown in Fig. 1, and Fig. 3 (a>, (b) is FIG. 4 is an enlarged view of the flange in the fitted and fixed state of the insulator base and coil assembly shown in FIG. 1, respectively; FIG. 5 is an enlarged view of a flange similar to FIG. 4 for explaining a second embodiment of the present invention, and FIG. 6 is an enlarged view of an insulator base and a coil assembly for explaining a conventional example. It is an enlarged view of the flange in a fitted and fixed state. 1... Coil assembly, 2... Armature assembly, 3...
・Insulator base, 4... Armature, 5... Insulator, 6...
- Movable contact spring, 7... Hinge spring, 8... Spool, 9... Iron core, 10... Hole part, 11... Flange part, 12 - Projection part, 13... Groove part, 14 ... Notch, 15... Winding, 16... Base, 17... Coil terminal, 18... Contact terminal, 1... Reference stand, 20
...Hole, 21...Neutral terminal, 22...Cover, 2
3...Sealant, 24...Permanent magnet.

Claims (1)

[Claims] 1. It has a U-shaped iron core around which a coil is wound, a permanent magnet arranged so that its magnetic pole comes into contact with the iron core, and a coil spool that fixes the permanent magnet and the iron core integrally. a coil assembly; an armature disposed such that both ends thereof face opposite ends of the iron core; and a hinge spring portion supporting a seesaw action in which both ends of the armature contact and separate from both ends of the iron core. an armature assembly in which a movable contact spring interlocked with the see-saw movement of the armature is integrally fixed with an insulator; and a box-shaped armature having an open top and a hole in the bottom, and the coil assembly in the opening. and a fixed contact terminal having a fixed contact facing the movable contact of the movable contact spring and the contact an insulator base on which a neutral terminal connected to one end of the hinge spring part forming a pole assembly is implanted; and an insulator base on which the coil assembly and the armature assembly are disposed, a groove portion is formed in a portion of the coil spool that faces the insulator base, and when the opening of the cover is sealed with a sealant, a bottom hole portion of the insulator base is formed. An electromagnetic relay characterized in that the insulator base and the coil spool of the coil assembly are fixed by the sealant that has penetrated further. 2. The electromagnetic relay according to claim 1, wherein a groove is formed at the bottom of the flange of the coil spool. 3. An electromagnetic relay according to claim 1, wherein the groove portion is a rectangular groove or a triangular groove.