JPH11167853A - Positioning method for armature block in electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily place an armature block on a fixed block, easily, surely assemble, and reduce dispersion of characteristics by bending a pair of projections toward the inside of the armature block, pressing the armature block, and positioning the armature block to the fixed block. SOLUTION: After an armature block is placed on a fixed block, projections 26 are pressed in the arrow direction from both sides with the specified jig so that force from both outside surfaces is uniformly applied, the deformable projections 26 deform in the inside direction of an electromagnetic relay, cut-out parts 131 of the armature block are pressed from both sides, and as a result, the central position of the armature block is reformed on the center side on the fixed block and positioned. By bending of the projections 26, the armature block is interposed between the projections 26 and positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for positioning an armature block of an electromagnetic relay when assembling the armature block on a fixed block.

[0002]

2. Description of the Related Art A conventional method for positioning an armature block in an electromagnetic relay is a first method in which a partition plate is provided on a fixed block, and a contact block is placed between the partition plates to perform positioning. Alternatively, a pair of notches are provided at both end portions in the width direction of the armature of the armature block mounted on the fixed block, and after the armature block is mounted on the fixed block, a protrusion is formed. There is a second method for positioning by inserting the jig from both sides into the notch.

[0003]

When the armature block is positioned on the electromagnet block by the above-mentioned conventional technique, the following problems occur.

First, when the positioning is performed by the first method, any part of the armature block may come into contact with the partition plate when the armature block is mounted on the fixed block. If the pole block comes into contact, the movable springs of the armature block will deform and the characteristics of the electromagnetic relay will be out of order. It is conceivable that the dimensions between the partition plates should be set to such a size, but when the dimensions between the partition plates are set to such a size, each part of the armature block comes into contact with the partition plate when the armature block is placed on the fixed block. However, there is a problem in that the armature block moves between the partition plates after being placed, and the armature block cannot be effectively positioned.

In order to position the armature block by the second method, it is necessary to always insert the jig into the notch portion of the armature block with high positional accuracy. If this high accuracy cannot be maintained, the jig will not be correctly inserted into the notch of the armature, and the jig operation will increase the displacement of the armature. If electromagnetic relays are mass-produced by this second method, the jig will repeatedly insert and remove from the notch as many as the number of electromagnetic relays produced, thereby causing the jig to friction with the notch , There is a problem that the positioning effect is reduced.

The present invention solves the above-mentioned problems by facilitating the mounting of the armature block on the fixed block, and can be easily positioned at a predetermined position by utilizing the deformation of the projection provided on the fixed block. It is an object of the present invention to improve the ease and certainty of assembling and to obtain an electromagnetic relay with less variation in characteristics.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an armature block is placed on a fixed block, and then the armature block is pressed from a symmetric position of the armature block. In the method for positioning an armature block in an electromagnetic relay for positioning the armature block at a predetermined position on a block, the fixed block is configured to be in non-contact with the armature block when the armature block is mounted on the fixed block. And a pair of deformable protrusions protruding from symmetric positions with each other, and after the armature block is mounted on the fixed block, both of the pair of protrusions are connected to the armature block. The armature block is deflected toward the inside to press the armature block, thereby positioning the armature block on the fixed block.

[0008]

According to the present invention, when positioning the armature block in the width direction, a pair of projections are symmetrical to each other on both sides of the fixed block in the width direction so as to be wider than the width dimension of the armature block. Since the armature block is provided at the position, when the armature block is placed on the fixed block, it is possible to prevent the armature block from contacting the protrusion, and the protrusion provided on the fixed block is deformable.
After the armature block is placed between the protrusions of the fixed block, an external pressing force is applied to deflect both the protrusions inward, thereby positioning the armature block by the deformed protrusions. Since it is possible, the armature block does not move between the protrusions after the armature block is placed.

Further, the operation accuracy of the jig which presses the pair of protrusions evenly does not require high operation accuracy unlike the prior art.
In addition, since positioning is performed for each armature block, the effect of positioning due to abrasion of the projection does not decrease, and the above-described conventional problems are solved.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an armature block, FIG. 2 is a perspective view showing a first embodiment of a fixed block, and FIG.
Is a perspective view showing a state in which the armature block of FIG. 1 is mounted on the fixed block shown in FIG. 2, FIG. 4 is a perspective view showing a second embodiment of the fixed block, and FIG. 5 is a fixed view shown in FIG. Perspective view showing a state where the armature block is placed on the block,
FIG. 6 is a diagram showing another shape of the protrusion shown in FIG. 2 or FIG.

As shown in FIG. 1, the armature block 1 comprises an armature 11, a movable contact structure 12, an armature swing bearing 13, a connecting part 14, and the like. The portion 13 extends from both sides of the connecting portion 14 in a substantially T-shape, and has a notch 131 on its outermost surface.
Is provided.

As shown in FIG. 2, the fixed block 2 of the first embodiment comprises a magnetic pole portion 21, a permanent magnet 22, a fixed contact structure 23, a movable contact terminal 24, and an armature swinging support portion. It has a welded portion 25 and a pair of deformable protrusions 26 provided near the formation of the movable contact terminal 24 and having a width smaller than the width of the notch 131.

Further, as shown in FIG. 4, the fixing block of the second embodiment has
2 is provided near the magnetic pole portion 21 at both ends in the longitudinal direction of the fixed block shown in FIG. 2 except that the dimension between the protrusions 26 is wider than the dimension in the longitudinal direction of the armature. It is the same as the structure of No. 2.

The projection 26 may be formed integrally with the fixed block 2 or may be manufactured separately and inserted into the fixed block 2 to be integrated with the fixed block 2. (In the present embodiment, an example is described as an example in which it is integrally molded.)

Further, the same material as that of the molding resin for injection molding the fixed block 2 may be used for the material of the projecting portion 26, and a constant shape such as silicon rubber, phosphor bronze, stainless steel or the like may be used. Any shape can be used as long as it can be maintained and deformed by an external force, and the shape of the protruding portion 26 can be any shape as long as it can be easily deformed by an external force. Although it may be something like a quadratic prism as shown in FIG.
The shape of the fixing block 2 may be substantially L-shaped when viewed from the width direction as described above.

Next, in the electromagnetic relay production process, as shown in FIG. 3, the armature block 1 is mounted on the fixed block 2 shown in FIG. 2, and the center position of the armature block 1 is changed to the armature. An operation for correcting and positioning the block 1 toward the center of the fixed block 2 from the width direction of the block 1 will be described.

First, the operation when the armature block 1 is mounted on the fixed block 2 shown in FIG. 2 will be described.

That is, when the armature block 1 is mounted on the fixed block 2, the mounting position of the armature block 1 on the fixed block 2 may be slightly shifted in the width direction of the fixed block 2. In order to prevent each part of the armature block 1 from coming into contact with the projection 26 even if there is such a slight deviation, the dimension B between the projections 26 shown in FIG. If the width is larger than the dimension A in the width direction of the armature block 1 (the dimensions A and B are set so that a gap larger than the possible deviation dimension is always open), the contact with the protrusion 26 is made. Since the respective parts of the pole block 1 do not contact each other, the mounting is completed as shown in FIG. 3 without any particular problem. At this time, as described above, the protrusion 26 is formed smaller than the notch width of the notch 131. Because it is, the cut-out portion 13
1, the protrusion 26 is inserted in a non-contact manner.

If the armature block 1 is misaligned when it is mounted on the fixed block 2, the armature block 1 is corrected and positioned as follows.

First, as shown in FIG. 3, when the mounting of the armature block 1 on the fixed block 2 is completed, the projecting portions 26 are moved from both sides in the directions of arrows, for example, by using a jig as shown in FIG. , So that the forces from both the outer surfaces are evenly applied, so that the protrusion 26 is deformable and thus deforms inward of the electromagnetic relay,
The notch 26 of the armature block 1 is pressed from both sides, and as a result, the armature block 1
Is corrected to the center side on the fixed block 2 to perform positioning.

That is, the bending of the projections 26 causes the armature block 1 to be positioned between the projections 26 as a result.

Next, in the production process of the electromagnetic relay, FIG.
As shown in FIG. 4, the armature block 1 is placed on the fixed block 2 shown in FIG. 4, and the center position on the armature block 1 is shifted from the longitudinal direction of the armature block 1 to the position of the armature block 2. The operation at the time of correcting and positioning to the center side will be described.

Also in this case, the above-mentioned armature block 1 is shown in FIG.
In order to prevent the armature block 1 from coming into contact with the protrusion of the fixed block 2 in the same manner as when the armature block 1 is mounted on the fixed block 2 shown in FIG. If the dimension D between the protrusions shown in FIG. 4 is made wider, a gap larger than a possible displacement dimension when the armature block 1 is mounted on the fixed block 2 shown in FIG. Above) projection 2
6 can be completed without any contact of the respective portions of the armature block 1 with each other. After the placement is completed,
For example, if the protrusion 26 is pressed in the direction of the arrow with a uniform force from both sides in the longitudinal direction using a jig or the like with the same force as when positioning the armature block 1 in the width direction, the protrusion 26 is fixed to the fixed block. 2 and the protrusion 2
6, the armature 11 is pressed, the center position of the armature block 1 is corrected to the center side on the fixed block 2, and the armature block 1 is positioned.

The positioning of the armature block 1 on the fixed block 2 is performed by the method described above, and the armature rocking support portion 13 of the armature block 1 is provided with the armature rocking support 13. If the projections 26 are obstructed in the subsequent assembly process if they have been welded to the respective armature swinging bearing welds 25 of the configuration described above, the projections 26 are cut off when assembly is completed. I just need to do it.

Needless to say, the protrusion 26 of the fixed block shown in FIG. 2 for correcting the displacement in the width direction and the protrusion 2 of the fixed block shown in FIG. 4 for correcting the displacement in the longitudinal direction.
It is easily conceivable to provide 6 in the same fixed block to perform positioning in the width direction and the longitudinal direction at the same time, and this embodiment shows an example in which the armature block is positioned with respect to the polarized electromagnetic relay. However, a non-polar electromagnetic relay may be used.

[0026]

According to the present invention as described above,
The positioning of the armature block on the fixed block is performed by placing the armature block without contacting the protrusion of the fixed block, and then pressing the protrusion provided on the fixed block to position the armature block. Since it is performed individually, the armature block can be positioned on the fixed block accurately and without deforming the movable spring, and it is possible to mass-produce electromagnetic relays with stable operation and return characteristics and little variation. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an armature block.

FIG. 2 is a perspective view showing a first embodiment of a fixed block.

FIG. 3 is a perspective view showing a state where the armature block is mounted on the fixed block of FIG. 2;

FIG. 4 is a perspective view showing a second embodiment of the fixing block.

FIG. 5 is a perspective view showing a state where the armature block is mounted on the fixed block of FIG. 4;

FIG. 6 is a diagram showing another shape of the protrusion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Armature block 11 ... Armature 12 ... Movable contact structure 13 ... Armature swinging support part 131 ... Notch part 14 ... Connection part 2 ... Fixed block 21 ... Magnetic pole part 22 ... Permanent magnet 23 ... Fixed contact structure 24 ... Movable contact terminal 25 ... Welding part of armature swinging support part 26 ... Protrusion

Claims (1)

[Claims] After the armature block is placed on the fixed block, the outer surfaces of the armature block are pressed from the positions where the outer surfaces of the armature block are symmetrical to each other, so that the outer surface of the armature block is moved to a predetermined position on the fixed block. In the method for positioning an armature block in an electromagnetic relay for positioning an armature block, the fixed block maintains non-contact with the armature block when the armature block is mounted on the fixed block, and is symmetrical to each other. After the armature block is mounted on the fixed block, the armature block has a pair of deformable protrusions protruding from a position, and then presses both of the pair of protrusions so that the protrusions of the armature block are inward. And positioning the armature block on the fixed block by bending the armature block toward the armature. Law.