JP2568557Y2 - 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 having a coil assembly, and more particularly to an electromagnetic relay having an improved coil transfer portion of a coil assembly having a winding region divided into two.

[0002]

2. Description of the Related Art Conventionally, this type of electromagnetic relay has a structure in which an insulator base having terminals is provided with an iron core, a coil and a winding (coil).
And a movable contact spring block including an armature and a movable contact spring, and are formed by covering the cover.

FIG. 3 is an exploded perspective view of a main part of an electromagnetic relay showing an example of such a prior art. As shown in FIG. 3, the conventional electromagnetic relay includes a coil assembly 1, a movable contact spring block 11, an insulator base 17, a cover (not shown), and the like. 4B and the like, and the U-shaped iron core 6 is installed, and the central flange 2a
Is formed by disposing a permanent magnet 5 at the center of the spool 2 formed with. The movable contact spring block 11 is
The armature 12 is arranged so that both ends of the armature are fitted, a hinge spring 15 for causing the armature 12 to perform a tilting movement, and a movable contact spring 13 having a movable contact 14 arranged near the armature 12 are insulated and fixed. It is formed integrally by the body 16. Further, the insulator base 17 is formed by implanting a fixed terminal 20 having a fixed contact 19 and an external lead-out terminal 21 in the insulating block 18. The coil assembly 1 is fixed in an insulator base 17, and furthermore, in order to enable the movable contact spring block 11 to be tiltable, a central rear surface projection (not shown) of the armature 12 is one of the permanent magnets 5. It is in contact with the end face. As a result, the rear projection becomes a fulcrum of the tilting movement of the armature 12, and the hinge spring 15 is connected to the external lead-out terminal 21.
(Neutral terminal).

FIGS. 4 (a) and 4 (b) are a cross-sectional view of the coil assembly shown in FIG. 3 and a rear view of a center flange portion thereof. As shown in FIGS. 4A and 4B, the coil assembly 1 is divided into two winding regions by arranging the permanent magnet 5 at the center flange. That is, a part around which the primary coil 3 and the secondary coil 4B are wound and a part around which the secondary coil 4A is wound are formed. Hereinafter, one is represented by 4B and the other is represented by 4A. In such a coil assembly 1, a coil transfer portion connecting one winding portion 4B and the other winding portion 4A has a forward groove 7a and a backward groove 8a having different depths.
And form. In addition, the forward groove 7a and the backward groove 8a are formed to be shallow without being half as deep as the winding height of the coil.
Reference numeral 9 denotes a coil lead-out terminal, and reference numeral 10 denotes a transfer coil, a so-called lead wire portion.

[0005]

The above-described conventional electromagnetic relay is provided at a coil bridging portion of a central brim connecting one of the two divided winding regions of the coil assembly forming the coil assembly and the other. Although the grooves are formed, since the grooves are shallow and narrow, the coil must be pulled up greatly when passing the coil from one winding area to the other winding area, and it is difficult for the coil to enter the outward groove. There are drawbacks. Further, at this time, the coil pulled up and down and the coil wound around the winding area are in contact with each other.

[0006] An object of the present invention is to provide an electromagnetic relay in which the coil can be prevented from being disconnected and the coil can be easily inserted into the groove.

[0007]

The electromagnetic relay according to the present invention is:
A coil assembly in which a permanent magnet is arranged at the center of a spool around which a coil is wound and a U-shaped iron core is mounted; an armature arranged so that both ends of the U-shaped iron core are fitted; and a tilting movement of the armature Contact spring block in which a hinge spring and a movable contact spring arranged near the armature are integrally fixed by an insulator fixed body, and an insulator base in which a fixed contact portion and an external lead terminal are implanted. With
The coil assembly is fixed to the insulator base, and the protrusion at the center of the armature abuts against one end surface of the permanent magnet so that the movable contact spring block can tilt. As a fulcrum, in an electronic relay in which the hinge spring is fixed to a part of the external lead-out terminal, the permanent magnet is arranged at the center of the spool, and one of the winding areas of a coil assembly that divides the winding area into two. At least one groove having an inclination corresponding to the height of the winding of the coil is formed in the center flange portion connecting the other winding regions.

[0008]

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

FIGS. 1 (a) and 1 (b) are a sectional view of a coil assembly of an electromagnetic relay and a rear view of a center flange portion thereof for explaining a first embodiment of the present invention. FIG.
As shown in FIGS. 3A and 3B, the present embodiment is different from the conventional example shown in FIGS. 3 and 4 in that the permanent magnet 5 is provided at the center of the U-shaped iron core 6 on which the coils 4A and 4B are wound. And an armature arranged so that both ends of the iron core 6 are fitted, a hinge spring for causing the armature to perform a tilting motion, and a movable contact spring arranged near the armature. Are integrally fixed by an insulator fixing body to form a movable contact spring block, and furthermore, a fixed contact portion and an external lead-out terminal are implanted in the insulating block to constitute an insulator base. The protrusion at the center of the armature abuts on the upper surface of the permanent magnet 5 so as to be fixed to an insulator base and to be capable of tilting the movable contact spring block, to serve as a fulcrum for the tilting movement of the armature. A spring is fixed to a part of the outgoing lead-out terminal. It is the same. In this embodiment, the permanent magnet 5 of the coil assembly 1 is connected to the center flange 2a.
, The winding area is divided into two, and the winding path of the brim 2a connecting the one winding area 4B and the other winding area 4A has an inclination matching the winding height of the coil. A groove 7 and a return groove 8 are formed.

In this embodiment, as described above, the permanent magnets 5 are arranged in the center flange 2a, so that the winding portions 4A and 4B of the coil assembly 1 are divided into two by the center flange 2a.
The transfer coil 10 from the primary coil 3 that has begun to be wound around the one winding portion 4B passes over the other winding portion 4A without forming a step between the coil and the center flange 2a due to the deeply formed outward groove 7. And does not hit the coil wound around the winding portion 4B again. Further, the coil 10 extending to the winding portion 4A is guided to the height at the start of winding by the inclination provided in the outward groove 7. The transfer coil 10 from the secondary coil, which has been wound by the winding part 4a, is passed over the slope by the return groove 8 formed in the center flange 2a. 4B. Therefore, no unnecessary force is applied to the coil.

FIGS. 2 (a) and 2 (b) are a sectional view of a coil assembly of an electromagnetic relay and a rear view of a center flange portion thereof for explaining a second embodiment of the present invention. FIG.
As shown in (a) and (b), the center flange portion of the coil assembly 1 in the present embodiment, that is, the coil transfer portion 2a,
Instead of forming only the outward groove 7a and not forming the return groove, a slope is provided on the entire central flange 2a. In short, the groove is not particularly required on the return path. Here, it is possible to return without making a step between the transfer coil 10 and the center flange portion 2a in the winding portion 4B.

[0012]

As described above, according to the present invention, a permanent magnet is arranged at the center and the winding area is divided into two parts. By forming at least one groove having an inclination corresponding to the winding height of the coil in the coil transfer part, the coil can be transferred between the winding parts without forming a step in the coil and the center brim, There is an effect that the coil can be prevented from being disconnected, and there is an effect that the coil is not pulled up in order to pass the coil to the other winding portion, so that the coil can easily enter the groove portion.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a cross section of a coil assembly of an electromagnetic relay and a back surface of a center flange portion thereof for describing a first embodiment of the present invention.

FIG. 2 is a diagram showing a cross section of a coil assembly of an electromagnetic relay and a back surface of a center flange portion thereof for explaining a second embodiment of the present invention.

FIG. 3 is an exploded perspective view of a main part of an electromagnetic relay showing an example of the related art.

FIG. 4 is a diagram showing a cross section and a back surface of the coil assembly shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil assembly 2 Spool 2a Central brim part 3 Primary coil 4A, 4B Secondary coil 5 Permanent magnet 6 Iron core 7 Outgoing groove 8 Returning groove 9 Coil lead-out terminal 10 Transfer coil 11 Movable contact spring block 12 Armature 13 Movable contact spring 14 Movable contact 15 Hinge spring 16 Insulated fixed body 17 Insulated fixed base 18 Insulated block 19 Fixed contact 20 Fixed terminal 21 External lead-out terminal

Claims (2)

(57) [Scope of request for utility model registration] 1. A coil assembly in which a permanent magnet is arranged at the center of a spool around which a coil is wound and a U-shaped iron core is mounted, an armature arranged such that both ends of the U-shaped iron core are fitted, and A movable contact spring block in which a hinge spring for causing the armature to perform a tilting motion and a movable contact spring disposed near the armature are integrally fixed by an insulator fixed body; and a fixed contact portion and an external lead terminal are insulated blocks. An insulator base implanted in the permanent magnet is fixed to the permanent magnet so that the coil assembly is fixed to the insulator base and the movable contact spring block is tiltable. Abutting against the end face to serve as a fulcrum for the tilting movement of the armature,
In the electromagnetic relay in which the hinge spring is fixed to a part of the external lead-out terminal, the permanent magnet is disposed at the center of the spool, and the winding area is divided into two parts, one of the winding areas and the other of the coil assembly. An electromagnetic relay, wherein at least one groove having an inclination corresponding to the height of the winding of the coil is formed in a central brim portion connecting the winding regions. 2. The electromagnetic relay according to claim 1, wherein the groove portion is formed only on the outward path, and the return path is formed with an inclination corresponding to the winding height of the coil over the entire flange.