JPH04133223A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To enhance the sealing performance by forming projections on both surfaces in longitudinal direction of an external leadout terminal, and thereby filing the spaces between the external leadout terminal and a cover and also an insulative base perfectly with a sealant. CONSTITUTION:An external leadout terminal 23 is provided with two projections 24 as projecting in the opposite directions, to each other while the lower projection 24 does contact the insulative base 15, provide that most parts remain off contacting. Therefore, the external leadout terminal 23 is sealed in the sealant 25 between the insulative base 15 and a cover 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay with an improved external terminal structure.

[Conventional technology]

Conventionally, this type of electromagnetic relay is constructed by mounting a coil assembly and an armature assembly on an insulator base, and removing a cover.

FIG. 4 is an exploded perspective view of an electromagnetic relay showing an example of such a conventional electromagnetic relay.

As shown in FIG. 4, the conventional electromagnetic relay has an armature assembly in which a movable contact 1 and a movable contact spring 3 having a hinge spring portion 2 are arranged on both sides of an armature 4 and integrally fixed with an insulating fixed body 5. It has three dimensions. Further, in the lower part of this armature assembly, a coil is wound around a coil spool 8 in which a U-shaped iron core 6 and a coil terminal 7 are buried, and a permanent magnet mounting hole provided at the center inside the iron core 6 is provided with a coil. A coil assembly in which a permanent magnet 9 is inserted and fixed is provided. Furthermore, these electrode assemblies and coil assemblies include a fixed contact terminal 12 to which a fixed contact 11 is fixed, a neutral terminal 13, and a coil lead-out terminal 1.
4 and an external lead-out terminal 23 for leading contacts and the like to the outside are embedded in an insulator base 15. In this assembly, the coil assembly is inserted into the insulator base 15, the coil terminal 7 and the coil lead-out terminal 14 are welded, and the armature assembly is welded to the tip of the hinge spring part 2 and the neutral terminal 13. Installing. Thereafter, the cover 22 is attached from above, and the lower surface of the insulator base 15 and the inner wall periphery of the cover 22 are filled with a sealant (not shown) and sealed.

FIG. 5 is an enlarged sectional view of the external lead-out terminal shown in FIG. 4.

As shown in FIG. 5, this external lead-out terminal 23 is arranged so as to be in contact with the insulator base 15, and the space between it and the cover 22 is filled with a sealant 25.

[Problem to be solved by the invention]

In the conventional electromagnetic relay described above, the external lead-out terminal is sandwiched between the outer wall of the insulator base 6 and the cover. Therefore, the external lead-out terminal comes into contact with the base or the cover, and the sealant cannot completely cover the periphery of the external lead-out terminal. Therefore, there is a drawback that the sealing property is broken from the boundary between the external lead-out terminal and the base or the boundary between the external lead-out terminal and the cover.

An object of the present invention is to provide an electromagnetic relay that improves such sealing performance.

[Means to solve the problem]

The electromagnetic relay of the present invention is equipped with an insulating base that is open on one side and has a coil lead-out terminal, a fixed terminal, and a neutral terminal implanted therein, a coil spool, an iron core, and a permanent magnet, and is mounted within the insulating base. A coil assembly, an armature assembly in which a movable spring having a movable contact, a hinge spring, and an armature are integrated with an insulating fixed body, a box-shaped cover, and a plurality of external lead-out terminals protruding from the peripheral wall of the insulating base. In an electromagnetic relay that is sealed by injecting a sealant such as epoxy from the inner wall of the cover and the bottom of the insulating base, the electromagnetic relay is pulled out along the insulating base and sealed by the sealant. It is constructed by providing a protrusion on the external lead-out terminal.

〔Example〕

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

FIG. 1 is an exploded perspective view of an electromagnetic relay showing an embodiment of the present invention, and FIG. 2 is a perspective view of the armature assembly in FIG. 1.

As shown in FIGS. 1 and 2, this embodiment has a fixed terminal 12 . An insulator base 15 on which a neutral terminal 13 and a coil lead-out terminal 14 are implanted, a protrusion 24 is formed, and an external lead-out terminal 23 for electrically leading out each terminal or contact to the outside is placed along an outer wall; A coil having a coil spool 8 which passes through a shaped iron core 6, has coil terminals 7 at both ends, and has minute protrusions 21 and notches 19 formed in the legs 20 at the bottom, and a permanent magnet 9 held in the center of the coil spool 8. The armature assembly includes an assembly, an armature assembly in which a movable contact spring 3 having a movable contact l and a hinge spring 2 are integrated with an armature 4 by an insulating fixed body 5, and a cover 22. The U-shaped iron core 6 in this electromagnetic relay is arranged so that both ends of the armature 4 fit into both magnetic pole parts, and the protrusion 10 of the armature 4 shown in FIG. 2 is in contact with the upper surface of the permanent magnet 9. The armature 4 is caused to perform a tilting motion. In this assembly, the hinge spring part 2 is welded to a part of the neutral terminal 13, and the cover 22 is placed on it, and then the cover 23, the 15 insulator bases, and the bottom surface of the base 15 are sealed with a sealant (not shown). (omitted).

Here, regarding the difference between this embodiment and the conventional example described above, in this embodiment, the external lead-out terminal 23 of the insulator base 15
The difference is that protrusions 24 are provided on both sides, and the rest is the same.

FIG. 3 is an enlarged sectional view of the external lead-out terminal shown in FIG. 1.

As shown in FIG. 3, the external lead-out terminal 23 is provided with two protrusions 24 in opposite directions, and although the lower protrusion 24 contacts the insulator base 15, most of the protrusions 24 are in contact with the insulator base 15. do not. Therefore, the external lead-out terminal 23 is connected to the insulator base 15.
and is sealed in a sealant 25 between the covers 22.

〔Effect of the invention〕

As explained above, by forming protrusions on both sides of the external lead-out terminal in the length direction, the external lead-out terminal does not come into contact with either the insulating base or the cover, and the external lead-out terminal and the cover Since the sealing agent is completely filled between the external terminal and the insulating base, there is an effect that high sealing performance can be achieved.

Ru.

DESCRIPTION OF SYMBOLS 1... Movable contact, 2... Hinge spring part, 3... Movable contact spring, 4... Armature, 5... Insulated fixed body, 6
... Iron core, 7... Coil terminal, 8... Coil spool, 9...

Permanent magnet, 10... Armature projection, 11... Fixed contact, 12... Fixed terminal, 13... Neutral terminal, 14...
・Coil lead-out terminal, 15...Insulator base, 16...
Coil spool fixing protrusion, 17...hole, 18...
・Reference stand, 19... Notch part 2o... Leg part, 2
DESCRIPTION OF SYMBOLS 1... Minute protrusion, 22... Cover, 23... External lead-out terminal, 24... External lead-out terminal protrusion, 25... Sealing agent.

[Brief explanation of drawings]

Claims (1)

[Scope of Claims] 1. An insulator base that is open on one side and has a coil lead-out terminal, a fixed terminal, and a neutral terminal implanted therein; a coil spool;
A coil assembly that includes an iron core and a permanent magnet and is mounted in an insulating base; an armature assembly that integrates a movable spring with a movable contact, a hinge spring, and an armature with an insulating fixed body; and a box-shaped cover. and a plurality of external lead-out terminals protruding from the peripheral wall of the insulating base, and the electromagnetic relay is sealed by injecting a sealant such as epoxy from the inner wall of the cover and the bottom of the insulating base, An electromagnetic relay characterized in that a protrusion is provided on an external lead-out terminal that is drawn out along a base and sealed with the sealant. 2. The electromagnetic relay according to claim 1, wherein there are at least two protrusions of the external lead-out terminal located in the sealant, and the protrusions protrude in opposite directions.