JPH0922820A - Method for adjusting electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for adjusting an electromagnetic relay which can be easily and accurately adjusted without deteriorating switching perfor mance. SOLUTION: A magnet-screening plate 34a is provided on the lower surfaces of magnetic pole parts 31a and 31b of a movable iron piece 31 which alternately contacts or leaves magnetic pole parts 21a and 21b of a core 21. Then, laser 51 is applied to a magnet-screening plate 34a and permeability is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of adjusting an electromagnetic relay, and more particularly to a method of irradiating a magnetic shield plate provided on a magnetic pole portion with a laser or the like to change magnetic permeability and adjust operating characteristics.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay, for example, based on the excitation and demagnetization of an electromagnet block formed by winding a coil around an iron core, the magnetic pole portion of the iron core is attracted, There is one that drives a movable contact piece through a movable block incorporating a movable iron piece that separates to open and close a contact. Then, in order to adjust the operation characteristics of such an electromagnetic relay, for example, after assembling all the internal components, the operation characteristics of the movable block and the movable contact are measured, and the adjustment amount for the movable contact piece is measured from the measurement result. Was calculated, and the spring load of the movable contact piece was adjusted by bending the movable contact piece in the plate thickness direction with an automatic bending machine based on the calculation result.

However, in the adjusting method described above, since the movable contact piece is bent in the plate thickness direction, not only the opening / closing performance is deteriorated, but also the movable contact piece is moved due to the material, the difference in the plate thickness and the variation in the material. It was difficult to adjust the spring load of the contact piece with high accuracy. In particular, with the downsizing of the electromagnetic relay, there has been a problem that it is difficult to perform delicate bending on the movable contact piece of the automatic bending machine, and it becomes more difficult to perform highly accurate adjustment.

In view of the above problems, it is an object of the present invention to provide an adjusting method of an electromagnetic relay which can be easily adjusted with high accuracy without lowering the switching performance.

[0005]

In order to achieve the above object, the present invention attracts and separates from the magnetic pole portion of the iron core based on the excitation and demagnetization of an electromagnet block formed by winding a coil around the iron core. In an electromagnetic relay that opens and closes contacts via a movable iron piece, a heating beam is emitted to a magnetic shield plate provided on at least one of the magnetic pole portion of the iron core and the magnetic pole portion of the movable iron piece that are in contact with and separated from each other. Then, the step of forming the adjustment concave portion is performed. Therefore, the magnetic shield plate provided on the magnetic pole portion of the movable iron piece or the magnetic shield plate provided on at least one of the front and back surfaces of the magnetic pole portion of the iron core is irradiated with the heating laser to form the adjustment concave portion. Good.

The adjusting recess may have a depth dimension that does not penetrate the magnetic shield, or may be at least one adjusting groove formed on the surface of the magnetic shield. further,
The polygon may be formed by at least three adjusting recesses provided on the surface of the magnetic shield.

Further, the magnetic shield may be made of a high melting point material such as SUS or Ni, or may have a multi-layer structure made of a material having a higher melting point from the surface layer to the lower layer.

[0008]

Therefore, according to the adjusting method of the present invention, by irradiating the heating beam, a part of the magnetic shield plate provided on the magnetic pole portion is removed, the magnetic flux easily passes, and the magnetic permeability changes.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS. As shown in FIG. 1A, the electromagnetic relay according to the first embodiment includes a box-shaped base 10 having a substantially U-shaped cross section, an electromagnet block 20, an armature block 30, and a case 40. Is. For convenience of description, a self-reset type electromagnetic relay will be described first, and then a self-holding type electromagnetic relay will be described.

The box-shaped base 10 has a base body 11 having a common terminal 12, contact terminals 13 and 14, coil terminals 15 and 15.
Is insert-molded, the connection receiving portion 12a located at the upper end of the common terminal 12 is exposed from the opening edge portion thereof, while the fixed contacts 13a of the contact terminals 13 and 14,
14a (the fixed contact located on the front side of the base body 11 in FIG. 1A is not shown) is exposed from the inner corner of the base body 11. Further, the connection receiving portion 15a of the coil terminal 15 (in FIG. 1A, only the connection receiving portion 15a located on the far side of the base body 11 is shown) is the base body 11.
It is exposed from the inner surface of the.

In the electromagnet block 20, a permanent magnet 22 is disposed in a central portion of an iron core 21 having a substantially U-shaped cross section so as to be substantially E-shaped and insert-molded on a spool 23, and the iron core exposed from the spool 23. The upper end surface of the magnetic pole portion 21
a and 21b. Further, the coiled portion 25a of the relay terminal 25 (the relay terminal located on the far side in FIG. 1A is not shown in the figure) is formed by winding the coil 24 around the spool 23 and insert-drawing the lead wire into the spool 23. It is soldered in a squeeze. Then, the electromagnet block 20
Is stored in the box-shaped base 10 and the relay terminal 25
Is mounted on the connection receiving portion 15a of the coil terminal 15 and integrated by welding.

The armature block 30 is a plate-shaped movable iron piece 3.
1 and the movable contact pieces 32, 32 arranged in parallel on both sides thereof are integrated with the support body 33 by outsert molding.
Movable contacts 32a and 32b are provided on the lower surfaces of the divided pieces formed by dividing the both ends of the movable contact piece 32 in the width direction. Further, a plane substantially T-shaped connecting portion 32c extends laterally from the substantially central portion of the movable contact piece 32 and projects from the side end surface of the support body 33. Also,
Magnetic pole portions 31a, 3 located at both ends of the movable iron piece 31
As shown in FIG. 1B, the magnetic shield 34
a, 34b (the magnetic shield plate 34b of the magnetic pole portion 31b is not shown)
Is provided. In addition, the magnetic shield plate 34a is the magnetic shield plate 34a.
Since it is made of the same material as b and is thin, it has a larger magnetic permeability than the magnetic shield 34b. And the armature block 30 is
Electromagnet block 20 incorporated in the box-shaped base 10
After being mounted on the permanent magnet 22 and positioned, the connecting portion 32c of the movable contact piece 32 is connected to the connection receiving portion 12a of the common terminal 12.
And the movable contacts 32a and 32b are rotatably supported by being integrally welded and electrically connected to the movable contacts 32a and 32b.
Are opposed to the fixed contacts 13a and 14a alternately so as to be able to contact and separate.

Reference numeral 40 is a case that can be fitted to the box-shaped base 10 incorporating the electromagnet block 20 and the armature block 30.

Next, the electromagnetic relay assembled with the above-mentioned components is adjusted as follows. That is, the electromagnet block 20 and the armature block 30 are attached to the box-shaped base 10.
After sequentially assembling, the operating characteristics of the armature block 30 are measured. For example, when the magnetic permeability of the magnetic pole portion 31a is lower than a specified value, the laser irradiation location, irradiation amount, and irradiation time are determined from the measurement results. Calculation is performed, and based on the calculation result, the magnetic shield plate 34a of the movable iron piece 31 is irradiated with the laser 51 by the laser irradiation nozzle 50 (FIG. 1 (b)).
The magnetic permeability is increased by melting a part of 4a to increase the magnetic attraction force to the magnetic pole portion 31a of the movable iron piece 31, and is adjusted so as to be larger than the spring load. Then, the operating characteristics are measured again, and if it is within the specified standard,
It is conveyed to the next assembly step, and when it is out of the predetermined standard, the above adjustment step is repeated.

Therefore, when the coil 24 is non-excited, the above-mentioned adjustment allows the magnetic shields 34 provided on the magnetic pole portions 31a and 31b located at both ends of the movable iron piece 31, respectively.
a and 34b, the magnetic permeability of the magnetic shield plate 34a is the same as that of the magnetic shield plate 34a.
Since it is larger than that of b, the magnetic force of the permanent magnet 22 causes the magnetic pole portion 31a of the movable iron piece 31 to be attracted to the magnetic pole portion 21a of the iron core 21 via the magnetic shield 34a, and the movable contact 32a to contact the fixed contact 13a. doing.

When a voltage is applied to the coil 24 to excite the magnetic flux of the permanent magnet 22 to excite it, the movable iron piece 31 supported by the connecting portion 32c rotates and moves against the magnetic force of the permanent magnet 22. The magnetic shield 34a of the iron piece 31 is attached to the iron core 21.
Of the fixed contact 13a after the movable contact 32a is separated from the fixed contact 13a.
And the magnetic pole portion 31b of the movable iron piece 31 contacts the magnetic shield plate 34b.
It contacts the magnetic pole portion 21b of the iron core 21 via.

Then, when the excitation of the coil 24 is released,
The load applied by the spring force of the movable contact pieces 32, 32 is larger than the magnetic attraction force by the magnetic force of the permanent magnet 22, and the magnetic permeability of the magnetic shield 34a of the movable iron piece 31 is large.
Since it is larger than that of b, the movable iron piece 31 is automatically inverted, returns to the original state, and the contacts are switched.

Although the self-reset type electromagnetic relay has been described in the above embodiment, the present invention is not limited to this, and the self-holding type electromagnetic relay may be assembled from the same components as described above. That is, after constructing a self-reset type electromagnetic relay with the same components as those of the above-described embodiment, the magnetic shield plate provided on the lower surface of the magnetic pole portion 31b is formed by the same method as that shown in FIG. 1B. 34b is irradiated with a heating laser to shield the magnetic shield 34b.
Is partially melted and removed to increase the magnetic permeability of the magnetic shield plate 34b, thereby making the magnetic permeability of the magnetic pole portions 31a and 31b equal and making the magnetic attraction force larger than the spring load.

Therefore, when the electromagnet block 20 is not excited, the magnetic pole portion 31a of the movable iron piece 31 is attracted to the magnetic pole portion 21a of the iron core 21 via the magnetic shield plate 34a, and the movable contact 32 is moved.
a is in contact with the fixed contact 13a.

Then, when a voltage is applied to the coil 24 of the electromagnet block 20 to excite it in a direction of canceling the magnetic flux of the permanent magnet 22, the movable iron piece 31 supported by the connecting portion 32c is rotated to move the movable iron piece 31. The magnetic shield 34a is the iron core 2
1 is separated from the magnetic pole portion 21a and the movable contact 32a is separated from the fixed contact 13a, and then the movable contact 32b is separated from the fixed contact 1a.
4a and the magnetic pole portion 31b of the movable iron piece 31 is connected to the magnetic shield plate 3
It is attracted to the magnetic pole portion 21b of the iron core 21 via 4b.

Further, even when the excitation of the electromagnet block 20 is released, the magnetic attraction force by the magnetic force of the permanent magnet 22 is larger than the spring load load by the spring force of the movable contact pieces 32, 32, so that the movable iron piece 31 rotates. Instead, the state is retained.

When the armature block 30 is returned to the original state, a voltage in the opposite direction to the above is applied to the coil 24 in order to cancel the magnetic flux of the permanent magnet 22, and the movable iron piece 31 is inverted. It returns to the original state, the contacts switch, and that state is maintained even if the excitation is released.

As is clear from the above description, according to the present invention, not only can the operating characteristics be adjusted with high accuracy, but
Since electromagnetic relays having completely different operations can be manufactured by using the same component parts, the number of parts to be managed is reduced and the parts management is facilitated. In particular, since the magnetic characteristics of the iron core and the magnetic poles of the movable iron piece can be finely adjusted without changing the quality, and an electromagnetic relay having different operating characteristics can be obtained, the adjustment work and the manufacturing work are easy. Further, in any of the above-described embodiments, the operating characteristics can be adjusted while the armature block 30 is attached to the electromagnet block 20, and the electromagnetic relays having different operations can be manufactured, which is advantageous in that the productivity is high. .

The heating beam for irradiating the movable iron piece is not limited to the laser, and the magnetic permeability can be changed by melting the magnetic shielding plate provided on the magnetic pole part such as electron beam and plasma. However, it is not particularly limited.

In the second embodiment, as shown in FIG. 3, the contact is opened and closed through the rotating movable iron piece 31 in the above-described first embodiment, whereas a pair of reciprocating movable iron pieces is used. This is a case where the contacts are opened and closed by 83 and 84. After explaining the case of applying to a self-reset type electromagnetic relay,
The case of application to a self-holding electromagnetic relay will be described. However, for convenience of description, only the electromagnet block 60 and the movable block 80 will be described, and description of the contact mechanism will be omitted.

That is, the electromagnet block 60 includes the coil 6
The iron core 70 is press-fitted into the through hole 63 of the spool 62 around which 1 is wound, the projecting one end portion is the magnetic pole portion 71, and the projecting other end portion 72 is formed by bending and raising one end portion of the yoke 75. Of the pair of tongues cut and raised from the yoke 75.
78b, front and back surfaces 73a of the magnetic pole portion 71 of the iron core 70,
73b are opposed to each other at a predetermined interval. The magnetic shield 71 is formed on the front and back surfaces 73a and 73b of the magnetic pole portion 71.
4a and 74b are provided (the magnetic shield 74b is not shown). However, since the magnetic shield plate 74b is made of the same material as the magnetic shield plate 74a and is thin, the magnetic shield plate 73b has a large magnetic permeability, and the back surface 74b has a magnetic attraction force larger than that of the front surface 73a. Incidentally, 64 and 64 are engagement receiving portions provided on the flange portion of the spool 62, and 65 is a coil terminal.

The movable block 80 is formed by press-fitting and holding a pair of movable iron pieces 83, 84 holding a permanent magnet 87 in a frame portion 82 of a resin-molded block body 81. Joint arms 85, 85 extend laterally. Then, the engagement arm portions 85, 85 of the block body 81 are connected to the engagement receiving portion 6 of the spool 62.
A pair of movable iron pieces 83, 84 are provided on the front and back surfaces 73a, 73b of the magnetic pole portion 71 of the iron core 70 by being engaged with and slidably supported by the magnetic shield plates 74, 64, respectively.
a and 74b so as to alternately approach and separate, and
The pair of movable iron pieces 83, 84 are the magnetic pole portions 78 of the yoke 75.
It opposes so that it may contact and separate from a and 78b by turns.

In order to adjust the operating characteristics of the electromagnetic relay according to this embodiment, first, the movable block 80 is assembled to the electromagnet block 60, and then the operating characteristics of the movable block 80 and the contact mechanism portion (not shown) are measured. Then, for example, when the magnetic permeability of the magnetic shield 74a is low, the laser irradiation location, irradiation amount, and irradiation time are calculated from the measurement result. Then, the movable block 80 is attached to the electromagnet block 6
By removing the value from 0 and irradiating the magnetic shield plate 74a provided on the surface of the magnetic pole portion 71 with the laser 51 from the laser irradiation nozzle 50 based on the above calculation result, and melting and removing a part of the magnetic shield plate 74a. , Increase magnetic permeability and fine-tune magnetic characteristics. Then, the movable block 80 is attached to the electromagnet block 60 again, and the operation characteristic is measured. If the operation characteristic is within the standard, the operation is carried to the next assembly step, and if it is out of the standard, the above adjustment is repeated.

Therefore, when the coil 61 is not excited,
Since the magnetic shield plate 74b thinner than the magnetic shield plate 74a is provided on the back surface 73a of the magnetic pole portion 71 of the iron core 70, the magnetic force of the permanent magnet 87 causes the movable iron piece 84 to move to the rear surface 73 of the magnetic pole portion 71 of the iron core 70.
b through the magnetic shield 74b, while the movable iron piece 83
Is attracted to the magnetic pole portion 78a of the yoke 75.

When a voltage is applied to the coil 61 so as to cancel the magnetic flux of the permanent magnet 87, the permanent magnet 87
The movable iron piece 84 is separated from the magnetic shield plate 74b provided on the magnetic pole portion 71 of the iron core 70 against the magnetic force of
While being attracted to b, the movable iron piece 83 is separated from the magnetic pole portion 78a of the yoke 75 and is attracted to the surface 73a of the magnetic pole portion 71 of the iron core 70 via the magnetic shield 74a. Therefore, the movable block 80 moves in parallel, and based on this, the engaging arm portions 85, 8
The movable contact piece (not shown) inserted in the slits 86, 86 of 5 rotates to switch the contacts.

Then, when the excitation of the coil 61 is released,
The spring load due to the spring force of the movable contact piece (not shown) is larger than the magnetic attraction force due to the magnetic force of the permanent magnet 87, and the magnetic shield plate 74b provided on the back surface 73b of the magnetic pole portion 71 is thin and is smaller than the magnetic shield plate 74a. Since the magnetic flux easily passes through, the movable block 80 automatically returns to the original state against the magnetic force of the permanent magnet 87, and the contacts are switched.

In the above-mentioned embodiment, the self-reset type electromagnetic relay has been described. However, for example, the self-holding type electromagnetic relay may be manufactured from the same components. That is, in the electromagnetic relay according to the second embodiment described above, the magnetic shield plate 74a provided on the surface 73a of the magnetic pole portion 71 of the iron core 70 thereof.
By irradiating the laser with a laser to melt and remove it, the magnetic permeability in the front and back surfaces 73a and 73b of the magnetic pole portion 71 is made equal, and the magnetic attraction force is made larger than the spring load load. A self-holding type electromagnetic relay can be manufactured. Since the method of adjusting the operating characteristics is the same as that described above, the description thereof will be omitted.

Therefore, according to the present embodiment, not only the variations in operating characteristics due to variations in parts accuracy and assembly accuracy can be adjusted by irradiating the heating beam, but also electromagnetic relays having completely different operation patterns can be manufactured with the same components. There is an advantage.

In the above-described embodiment, the case where the magnetic shield plates 74a and 74b provided on the front and back surfaces of the magnetic pole portion 71 are irradiated with the laser has been described. However, the laser irradiation does not have to be performed in one place, but in a plurality of places. May be irradiated to the adjustment recess 7 for example, as shown in FIG.
The 5 may be arranged concentrically and radially. With this arrangement, even if the edge of the adjustment recess 75 is raised due to laser irradiation, the movable iron piece 8
There is an advantage that the operation characteristics are stable because the magnets 3 and 84 do not hit the magnetic shield plates 74a and 74b.

Further, the adjustment concave portion 75 generated by the laser irradiation does not necessarily have a depth dimension to expose the iron core 71. For example, as shown in FIG. 4, the irradiation energy, the irradiation time, etc. may be adjusted. Thus, the adjustment recess 75 having a depth dimension that does not reach the iron core 71 may be formed. By forming such an adjustment recess 75, it is possible to perform fine adjustment with higher accuracy.

Further, as shown in FIG.
The number 5 does not necessarily have to be the scattered point shape as described above, and may be a plurality of parallel groove shapes. The width dimension, pitch, and positional relationship of the groove-shaped adjusting recess 75 can be appropriately selected as necessary, but by forming the adjusting recess 75 so as to be bilaterally symmetric, even if the edge of the adjusting recess 75 rises, The movable iron pieces 84 and 85 do not hit each other, and the operation characteristics are stable.

Then, as shown in FIG. 6, the magnetic shield 7
4a does not necessarily have to be a single layer, and may be a material in which materials 76a, 76b, and 76c having different melting points are laminated and integrated. In particular, if the magnetic shield 74a is formed by laminating and integrating materials whose melting points sequentially increase from the surface layer to the lower layer, the adjustment recess 75 having a highly accurate depth dimension can be formed by adjusting the irradiation temperature. Since it can be formed, there is an advantage that the adjustment can be performed with higher accuracy.

The adjustment recess 75 is not limited to the above-described shape, but may be formed in a grid pattern on the surface of the magnetic shield, or may be formed in a concentric circle shape including a plurality of annular grooves. You may form.

Furthermore, the adjusting recess 7 according to the second embodiment.
It goes without saying that the shape and the like of 5 may be applied to the electromagnetic relay according to the first embodiment.

[0040]

According to the first to eighth aspects of the method for adjusting an electromagnetic relay according to the present invention, the magnetic shield plate provided on the magnetic pole portion is irradiated with a heating beam to partially expose the magnetic shield plate. Melting,
By removing, magnetic permeability can be changed and magnetic characteristics can be adjusted. Therefore, it is not necessary to consider the springback of the movable contact piece as in the conventional example, and the operating characteristics of the electromagnetic relay can be adjusted without degrading the opening / closing performance. As a result, not only the operating characteristics can be stabilized, but also highly accurate adjustment can be facilitated, and the quality can be stabilized and the defect rate can be reduced. Also, even if the electromagnetic relay becomes smaller,
According to the invention of the present application, since it suffices to irradiate the heating beam to a predetermined place, it is possible to perform a delicate adjustment work,
In combination with the above-mentioned effects, it becomes possible to perform adjustment with higher accuracy. Furthermore, since it only needs to irradiate the heating beam,
It does not take time and effort to adjust the operating characteristics, and automation of the adjustment work in the assembly process becomes easy. According to the fourth aspect, since the depth dimension of the adjustment concave portion is adjusted, it is possible to adjust the operating characteristics with higher accuracy. According to the fifth aspect, not only the suction force characteristics can be easily adjusted by the length dimension of the adjustment groove portion, but also the number of processing steps is small and the processing is easy. In particular, if the adjusting groove is formed symmetrically about the attraction center of the magnetic pole, even if the edge of the groove rises,
One-sided contact does not occur and the operating characteristics are stable. According to the sixth aspect, since the adjusting recess forms a polygon, even if a bulge occurs at the edge of the adjusting recess, the other members do not hit each other and the operating characteristics are stable. According to claim 7, since a high melting point material such as SUS is used for the magnetic shield, swelling is less likely to occur at the edge of the adjustment recess, uneven contact between members can be prevented, and operation characteristics are stable. Turn into. According to the eighth aspect, since it becomes easy to adjust the depth dimension of the adjusting concave portion by utilizing the temperature difference of the melting points, there is an effect that the magnetic characteristics can be adjusted more accurately and easily. .

[Brief description of drawings]

1 is a perspective view showing a first embodiment of an electromagnetic relay according to the present invention, FIG. 1 (a) is an exploded perspective view, and FIG. 1 (b) is a perspective view showing a processing method.

FIG. 2 is an exploded perspective view showing a second embodiment of the electromagnetic relay according to the present invention.

FIG. 3 is a partial front view of the iron core shown in FIG.

FIG. 4 is a partial cross-sectional view showing an application example of the iron core shown in FIG.

5 shows another application example of the iron core shown in FIG. 2, FIG. 5 (a) is a partial front view, and FIG. 5 (b) is a partial sectional view.

6 shows another application example of the iron core shown in FIG. 2, FIG. 6A is a partial cross-sectional view before processing, and FIG. 6B is a partial cross-sectional view after processing.

[Explanation of reference numerals] 13a, 14a ... fixed contact, 20 ... electromagnet block, 2
1 ... Iron core, 21a, 21b ... Magnetic pole part, 22 ... Permanent magnet,
24 ... Coil, 30 ... Armature block, 31 ... Movable iron piece, 31a, 31b ... Magnetic pole part, 32 ... Movable contact piece, 32
a, 32b ... movable contact, 34a, 34b ... magnetic shield plate, 51
… Laser for heating, 60… Electromagnet block, 70… Iron core,
71 ... Magnetic pole portions, 73a, 73b ... Front and back surfaces, 74a, 74
b ... magnetic shield plate, 75 ... adjustment recess, 80 ... movable block,
83, 84 ... movable iron pieces, 87 ... permanent magnets.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jun Kamesasa, 10 Odoron-cho, Hanazono Todo-cho, Ukyo-ku, Kyoto City, Kyoto Prefecture

Claims (8)

[Claims] 1. An electromagnetic relay that opens and closes contacts through a movable iron piece that is attracted to and separated from a magnetic pole portion of the iron core based on the excitation and demagnetization of an electromagnet block formed by winding a coil around the iron core. An electromagnetic relay, characterized in that a magnetic shielding plate provided on at least one of the magnetic pole portion of the iron core and the magnetic pole portion of the movable iron piece that come into contact with and separate from each other is irradiated with a heating beam to form an adjustment recess. Adjustment method. 2. The method of adjusting an electromagnetic relay according to claim 1, wherein a heating laser is applied to a magnetic shield plate provided on a magnetic pole portion of the movable iron piece. 3. The method of adjusting an electromagnetic relay according to claim 1, wherein a heating laser is applied to a magnetic shield plate provided on at least one of the front and back surfaces of the magnetic pole portion of the iron core. 4. The depth of the adjusting recess is set so as not to penetrate the magnetic shield plate.
The method for adjusting an electromagnetic relay according to any one of 1. 5. The method for adjusting an electromagnetic relay according to claim 1, wherein the adjusting recess comprises at least one adjusting groove. 6. At least 3 provided on the surface of the magnetic shield.
The method for adjusting an electromagnetic relay according to claim 1, wherein a polygon is formed by the individual adjusting recesses. 7. The method of adjusting an electromagnetic relay according to claim 1, wherein the magnetic shield plate is made of a high melting point material such as SUS or Ni. 8. The adjustment of the electromagnetic relay according to claim 1, wherein the magnetic shield has a multi-layer structure made of a material having a higher melting point from a surface layer to a lower layer. Method.