JPH05342964A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object to provide an electromagnetic relay having uniform operation characteristics and high productivity. The iron core 55 is inserted into the center hole of a spool 54 around which the coil 51 is wound, and the projecting one end serves as a magnetic pole part and the projecting other end 55.
In the electromagnetic relay in which the electromagnet portion 50 formed by crimping and fixing to the vertical portion of the yoke 56 that is bent in a substantially L shape is provided on the upper surface of the insulating plate 20 that covers the upper opening of the terminal block 10, the yoke 56 The vertical lower end of the yoke 56 is placed on the upper surface of the positioning base 21 protruding from the upper surface of the insulating plate 20, and the caulking projections 56a protruding from both side edges of the vertical lower end of the yoke 56 are attached to the positioning base. The electromagnet portion 50 is formed by caulking the concave portions 21a wider than the plate thickness of the caulking protrusions 56a provided on the opposite side surfaces of the electromagnet 21.
Is fixed to the insulating plate 20, which is an electromagnetic relay.

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 a positioning structure for an electromagnet section.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay, for example, as shown in FIG. 8, generally, a terminal block 10, an insulating plate 20,
Some include an electromagnet section 30 and a case 40.

That is, the terminal block 10 is an insulating plate 2 which will be described later.
0 forms a base with 0, and the movable insulating base 11 is slidably installed in a slide groove (not shown) provided at the center, and a plurality of small pieces are provided at equal intervals so as to face both sides of the slide groove. Fixed contacts 13 of the contact terminals 12 are provided in the room. The movable contacts 15 of the contact pieces 14 protruding laterally at equal intervals from both sides of the movable insulating base 11 face the fixed contact 13 so that they can come into contact with and separate from the fixed contacts 13. In addition, 16 is a coil terminal.

The insulating plate 20 is for covering the upper opening of the terminal block 10 for insulation, and the electromagnet portion 30 is placed on the upper surface thereof.

The electromagnet portion 30 is formed by winding a coil 33 around an iron core 31 via a spool 32, and a movable iron piece 35 is rotatably supported by a hinge via a return spring 34.
Then, the electromagnet part 30 placed on the insulating plate 20 is
The inner surface of the case 40 fitted to the terminal block 10 and the rib portion 41 thereof are brought into pressure contact with the upper brim portion 36 and the like of the spool 32, so that the insulating plate 20 is positioned. The lower end of the movable iron piece 35 penetrates an operation hole (not shown) of the insulating plate 20 and is engaged with one end of the movable insulating base 11.

Therefore, when the electromagnet portion 30 is not excited, the movable iron piece 35 is moved by the spring force of the return springs 17 and 34.
Is separated from the iron core 31, and the movable insulating base 11 is
Is urged to the left in FIG.
Is separated from the fixed contact 13.

Then, the coil 3 is connected through the coil terminal 16.
When 3 is excited, the movable iron piece 35 is attracted to the iron core 31, so that the movable iron piece 35 rotates counterclockwise in FIG. 8 against the spring force of the return spring 34. Therefore, the movable insulating base 11 slides against the spring force of the return spring 17, and the movable contacts 15 contact the fixed contacts 13, respectively.

Next, when the excitation is released, the return spring 17
At the same time that the movable insulating base 11 is pushed back by the spring force of 1, the movable iron piece 35 is rotated in the opposite direction by the spring force of the return spring 34, and the original state is restored.

[0009]

However, in the above-mentioned electromagnetic relay, the positioning of the electromagnet portion 30 with respect to the insulating base 10 is performed by the inner side surface of the case 40 fitted to the insulating base 10 and the rib portions 41, 41 thereof. Therefore, when the terminal block 10, the movable insulating base 11, the spool 32, the case 40, and the like, which have variations in dimensional accuracy, are assembled, variations in the assembly precision are further increased due to an integration error, and variations in operating characteristics are likely to occur. For this reason, a method of plastically deforming the movable iron piece 35 to adjust it is also considered, but this method does not facilitate fine adjustment and requires fine adjustment by another method. There is a problem that the property is low.

In view of the above problems, it is an object of the present invention to provide an electromagnetic relay which eliminates variations in assembly accuracy due to variations in dimensional accuracy of parts, has uniform operation characteristics and high productivity.

[0011]

In order to achieve the above object, an electromagnetic relay according to the present invention has flanges at both ends, and an iron core is inserted through a center hole of a spool around which a coil is wound, An electromagnet portion is formed on the upper surface of the base on which the contact mechanism portion is assembled, the electromagnet portion having the protruding one end portion as a magnetic pole portion and the protruding other end portion fixed by crimping to a vertical portion of a yoke bent into a substantially L shape. In an electromagnetic relay that drives the contact mechanism section by a movable iron piece that rotates around the horizontal tip of the yoke as a fulcrum based on the excitation and demagnetization of the electromagnet section, the vertical lower end of the yoke is projected on the upper surface of the base. The caulking projections, which are placed on the upper surface of the positioning table and project from both side edges of the vertical lower end of the yoke, are wider than the plate thickness of the caulking projections provided on the opposite side surfaces of the positioning table. Caulking in the wide recess As a result, the electromagnet portion is fixed to the base. Further, a positioning engaging portion provided on an outer surface of the collar portion located on the magnetic pole portion side of the iron core of the spool is provided on the upper surface of the base so as to prevent the electromagnet portion from being lifted up. It may be configured to be locked to the stopper portion.

[0012]

Therefore, according to the first aspect of the present invention, the electromagnet portion can be positioned and fixed at a desired position by plastically deforming the crimping projection of the yoke.
According to the second aspect, the electromagnet portion can be positioned and fixed at a desired position while being prevented from being lifted up on the magnetic pole portion side.

[0013]

Embodiments of the present invention will now be described with reference to the accompanying drawings of FIGS. As shown in FIGS. 1 to 4, the electromagnetic relay according to the first embodiment mainly differs from the conventional example in the shape and mounting structure of the electromagnet portion.

That is, as shown in FIG. 1, in the electromagnet portion 50 according to the present embodiment, the laminated iron core 55 is inserted into the center hole of the spool 54 having the collar portions 52 and 53 at both ends around which the coil 51 is wound. The projecting one end is a magnetic pole part (not shown), and the projecting other end 55b is caulked and fixed to the vertical part of the yoke 56 bent into a substantially L shape. further,
A movable iron piece 57 is rotatably supported by a hinge at the horizontal tip of the yoke 56, while caulking projections 56a and 56a project from both side edges of a vertical lower end.

On the other hand, the insulating plate 20, like the insulating plate according to the above-mentioned conventional example, has a planar shape that covers the upper opening of the terminal block 10 and forms a base together with the terminal block 10. An operation hole (not shown) through which the lower end of the movable iron piece 57 penetrates while the positioning base 21 is provided on the upper surface.
Is provided. The positioning table 21 is provided with caulking recesses 21a, 21a wider than the plate thickness of the caulking projection 56a on opposite side surfaces.

Therefore, the insulating plate 20 is attached to the electromagnet portion 5.
When attaching 0, the vertical lower end of the yoke 56 is placed on the upper surface of the positioning table 21, and the lower end of the movable iron piece 57 is not shown in the terminal block 10 through the operation hole of the insulating plate 20. After engaging with the movable insulating base, the electromagnet portion 50 is displaced in the axial direction to adjust the positioning, and then the caulking projections 56a and 56a are attached to the caulking concave portion 21a.
The mounting work is completed by bending and fixing by caulking each inside 21a.

According to this embodiment, after the electromagnet portion 50 is displaced in the axial direction to be positioned at a desired position, the caulking projections 56a, 56a are crimped to the insulating plate 20.
Since it is fixed, the positioning adjustment can be performed more delicately than in the conventional example, the variation in the assembly accuracy due to the variation in the dimensional accuracy of the component parts can be eliminated, and the assembly accuracy is improved.

As shown in FIGS. 5 to 7, the second embodiment is substantially the same as the above-mentioned first embodiment, except that the outside of the flange portion 52 located on the magnetic pole portion 55a side of the iron core 55. A pair of positioning locking projections 52a, 52a is provided on the side surface, while positioning locking receiving portions 22, 22 for locking the locking projections 52a, 52a are provided on the upper surface of the insulating plate 20. is there. Reference numeral 23 is an operation hole through which a movable iron piece (not shown) penetrates.

Therefore, the protrusion 52 provided on the collar portion 52
a, 52a provided on the insulating plate 20
Of the yoke 56, the vertical lower end of the yoke 56 is placed on the upper surface of the positioning base 21 of the insulating plate 20, and then the electromagnet portion 50 is axially moved. After adjusting the position by shifting
The assembling work of the electromagnet part 50 is completed by bending the caulking protrusion 56a (the protrusion on the back side is not shown) into the recess 21a of the positioning base 21 and caulking it.

According to this embodiment, the collar portion 5 of the spool 54 is
Since the locking projection 52a is provided on the second member 2, there is an advantage that the lifting of the electromagnet portion 50 on the magnetic pole portion 55a side can be prevented and the assembling accuracy is further improved.

A recess serving as a positioning locking portion is provided on the outer surface of the flange portion on the side of the magnetic pole, and a claw portion serving as a positioning locking receiving portion that locks with the recess is provided by projecting on the insulating plate. Lifting may be prevented. Further, the electromagnetic relay to be applied is not limited to the one described above, and it is needless to say that the electromagnetic relay may be applied to an electromagnetic relay in which a contact mechanism section is assembled on the upper surface of a substantially plate-shaped base.

[0022]

As is apparent from the above description, according to claim 1 of the present invention, when the electromagnet portion is attached to the insulating plate, the electromagnet portion is positioned and adjusted to a desired position on the base and then caulked and fixed. As a result, variations in assembly accuracy due to variations in dimensional accuracy of each component are eliminated, and variations in operating characteristics do not occur. Moreover, since the positioning can be adjusted only by shifting the electromagnet portion in the axial direction, the adjustment work is simpler than the conventional example, and the productivity is improved. Further, according to the second aspect of the present invention, since it is possible to prevent the electromagnet part from being lifted up on the magnetic pole part side through the locking projection provided on the collar part of the spool located on the magnetic pole part side, it is possible to combine with the above-mentioned configuration. Assembling accuracy of the electromagnet part is further improved,
This has the effect of making the operating characteristics even more uniform.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an electromagnetic relay according to the present invention.

FIG. 2 is an exploded front view of a main part of the first embodiment before assembly.

FIG. 3 is a perspective view of an essential part showing the middle of assembly of the first embodiment.

FIG. 4 is a front view of a main portion of the first embodiment after assembly.

FIG. 5 is an exploded perspective view showing a second embodiment of the electromagnetic relay according to the present invention.

FIG. 6 is a side view of the electromagnet section according to the second embodiment after assembly.

FIG. 7 is a front view of the electromagnet unit according to the second embodiment after assembly.

FIG. 8 is a sectional view of an electromagnetic relay according to a conventional example.

[Explanation of Codes] 10 ... Terminal Block, 20 ... Insulation Plate, 21 ... Positioning Platform, 21
a ... concave part, 22 ... locking receiving part, 22a ... concave part, 50 ... electromagnet part, 51 ... coil, 52, 53 ... collar part, 52a ... locking projection, 54 ... spool, 55 ... iron core, 55a ... magnetic pole part ,
55b ... other end, 56 ... yoke, 56a ... crimping projection, 57 ... movable iron piece.

Claims (2)

[Claims] 1. An iron core is inserted into a center hole of a spool around which a coil is wound, having flanges at both ends, and one protruding end is a magnetic pole part, and the other protruding end is substantially L-shaped. The electromagnet part formed by crimping and fixing to the vertical part of the bent yoke at
An electromagnetic relay in which a contact mechanism section is provided on an upper surface of a base, and the contact mechanism section is driven by a movable iron piece that rotates about a horizontal tip of the yoke as a fulcrum based on excitation and demagnetization of the electromagnet section. The vertical lower end of the yoke is placed on the upper surface of the positioning base projecting from the upper surface of the base, and the caulking projections projecting from the both side edges of the vertical lower end of the yoke are provided on the opposite side surfaces of the positioning base. An electromagnetic relay characterized in that the electromagnet portion is fixed to the base by crimping into a concave portion wider than the plate thickness of the crimping projection provided on the base. 2. A positioning locking portion provided on an outer surface of a collar portion located on a magnetic pole portion side of an iron core of the spool is provided on an upper surface of the base so as to prevent the electromagnet portion from floating. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is locked to a positioning lock receiving portion.