JPH01274332A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an electromagnetic relay.

(Prior Art) Generally, during the first adjustment and inspection of an electromagnetic relay, the following of a movable iron piece (armature) is measured with a gauge in order to check the contact pressure.

(Problem to be Solved by the Invention) However, the gap between the magnetic pole surface of the iron core and the magnetic pole surface of the movable iron piece is extremely narrow, and especially when a shielding plate is spot welded to the magnetic pole surface of the iron core, The magnetic shield plate may be deformed,
There was a problem in that it had to be inserted carefully so as not to turn over, making the work cumbersome and difficult.

The present invention was made in view of such problems, and an object of the present invention is to provide an electromagnetic relay in which a gauge for measuring the follow of a movable iron piece can be easily inserted.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a fixed member located near the iron core of the electromagnet block that is connected to the gap between the magnetic pole face of the iron core and the magnetic pole face of the movable iron piece. A gauge insertion hole is provided, and a part of the edge of the gauge insertion hole is formed substantially flush with the magnetic pole surface of the iron core.

(Function) According to the above configuration, when the follow measurement gauge of the movable iron piece is inserted into the gauge insertion hole, a part of the edge of the gauge insertion hole is approximately flush with the magnetic pole surface of the iron core, so that The gauge is inserted into the gap between the magnetic pole surface of the iron core and the magnetic pole surface of the movable iron piece while being guided by the edge of the gauge insertion hole.

(Example) Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 4 show an electromagnetic appliance according to the present invention, which roughly consists of a base 1, an electromagnetic block 2, a contact mechanism 3, a movable block 4, and a case 5.

As shown in FIG. 4, the base l is box-shaped, and is partitioned into upper and lower parts by an insulating partition wall IO provided horizontally at the center of the interior, and an electromagnet block accommodating part 11a whose upper part is open upward.
The lower part is a contact mechanism accommodating part zb having windows 12a, 12a opening on both sides and a window 12b opening on the lower side. In addition, a movable block accommodating portion 11c straddles the electromagnet block accommodating portion 11a and the contact mechanism accommodating portion llb.
is formed.

A guide groove I3 into which a flange of a spool 21 of an electromagnet block 2 to be described later is fitted is provided on the inner wall surface of the electromagnet block accommodating portion 11a, and a part of the guide groove 13 has a projection 25 protruding from the flange. An engagement hole 14 is formed in which the engagement hole 14 is engaged.

At the opposing corners of the opening edges of each side window 12a, 12a of the contact mechanism accommodating portion 11b, a claw portion 6 of a cover 6, which will be described later, is provided.
1. The locking portions 15 with which the protrusions 62 engage, respectively. An engagement recess 16 is formed. And side window parts 12a, 12
The contact portion of the contact mechanism 3 is visible from three directions, ie, both sides and the bottom, through the lower window portion 12b and the lower window portion 12b, and inspection and adjustment of the contact portion can be easily performed. especially,
Since the lower window portion 12b is also provided below the first fixed contact 30, it is easy to adjust the position of the first fixed contact 30, that is, adjust the contact pressure, etc.

The side windows 12a, 12a and the lower window 12b of the contact mechanism accommodating portion 11b are covered with a cover 6. This cover 6 has a side window portion 12a.

Side walls 60a, 60a that cover 12a, and lower window portion 12b
It is box-shaped with a missing wall surface, and consists of a bottom wall 60b that covers the base l, and an insulating wall 60c that is in contact with the inner wall surface of the base l, and the opposing corners of each side wall 60a, 60a are Locking portion 15 of side window portion 12a. Claw portions 61 that engage with the engagement recesses 16, respectively. A protrusion 62 is provided.

Then, the four wall surfaces of the cover 6, that is, the side wall 60a,
60a, the bottom wall 60b, and the insulating wall 60c separate the coil terminals 24a, 24b, 24c and the contact portions, so that the coil terminals 24a, 24b, 24c and the contacts 30, 3
The insulation distance of 2.34 is ensured by the creepage distance over the side walls 60a, 60a or the insulation wall 60c, and is completely insulated.

Shaft holes 17a and 17b into which support shafts 40a and 40b of the movable block 4, which will be described later, fit are formed in opposing side walls of the movable block accommodating portion 11c. Notch 17c leading to.

17d is formed. As shown in FIG.
It is provided closer to the axis of a movable contact piece 36 of the contact mechanism 3, which will be described later, with respect to the axis of the iron core 22.

Further, gauge insertion holes 19a and I9b are provided in one side wall of the movable block housing portion 11c. As shown in FIG.
A magnetic shielding plate 27 fixed to the magnetic pole surface, that is, the magnetic pole piece 26
It communicates with the gap between the surface of the movable iron pieces 43a and the magnetic pole faces of the movable iron pieces 43a and 43b.

In addition, the lower edge of the gauge insertion hole 19a and the gauge insertion hole 1
The upper edges of 9b are substantially flush with the surfaces of magnetic shielding plates 27 and 27, respectively. And this gauge insertion hole 19a,
The insertion opening of 19b is expanded in a tapered shape and becomes wider.
Gauges are easier to insert.

Further, at the side end of the bottom wall of the base I, a first fixed contact terminal 31. which will be described later. a groove 18a into which the movable contact terminal 35 is press-fitted;
18b is formed, and in the vicinity of the insulating partition wall 10 on the side wall opposite to the grooves 18a and 18b, as shown in FIG.
A groove 18c is formed into which a second fixed contact terminal 33, which will be described later, is press-fitted.

The electromagnet block 2 includes a spool 2 around which a coil 20 is wound.
1, an iron core 22, and a yoke 23. Coil terminals 24a and 24b are provided on one side of the spool 21.
, 24c are press-fitted and connected to the coil 20. Further, in the side end surfaces of both flanges of the spool 21, an engagement hole I formed in the electromagnet block accommodating portion 11a of the base L is provided.
A protrusion 25 that engages with 4 is formed. The iron core 22 is
A magnetic shielding plate 27 is fixed to each upper and lower magnetic pole surface of a magnetic pole piece 26 that is inserted through the spool 21 and has both ends protruding and protrudes from one end. The yoke 23 has a substantially U-shape, and one end is fixed to one end of the iron core 22, and opposing magnetic pole pieces 28a and 28b at the other end are arranged so as to sandwich the magnetic pole piece 26 of the iron core 22 from above and below. It faces the magnetic pole face.

The contact mechanism 3 has a first fixed contact terminal 31 having a first fixed contact 30, a second fixed contact terminal 33 having a second fixed contact 32, a movable contact 34 at one end, and a movable contact terminal at the other end. 35 and a movable contact piece 36 having a diameter of 35.

The first fixed contact terminal 31 and the movable contact terminal 35 are
The second fixed contact terminal 33 is press-fitted into the grooves 18a and 18b of the base I from the front side in FIG. As shown in FIGS. 1 and 3, a movable contact 34 is interposed between the first fixed contact 30 and the second fixed contact 32 at a predetermined interval.

The movable block 4 has an oval shape on its side, and has a pair of support shafts 40a and 40b protruding near its bent portion to fit into the shaft holes 17a and 17b of the base l. Further, as shown in FIG. 1, a slit 41 is formed at one end of this movable block 4, and a pair of movable iron pieces 43a and 43b with a permanent magnet 42 sandwiched between them are integrally formed at the other end by insert molding. has been done. This movable block 4 is
The support shafts 40a, 40b are connected to the shaft holes 17a, 17 of the base I.
b, as shown in FIG. and the magnetic pole pieces 28a, 28b of the yoke 23.

The case 5 includes the electromagnet block housing portion 11 of the base l.
A is placed over the base L, and a sealing agent is filled between the base L and the base L to form a hermetically sealed seal.

In the electromagnetic relay consisting of the above configuration, the movable block 4
The support shafts 40a and 40b are connected to the notches 17c of the base l.

When the notches 17c and 17d are engaged and pushed in, both sides of the notches 17c and 17d are elastically deformed and the support shafts 40a and 40b are inserted into the shaft hole 17.
a, 17b, so that the movable block 4
can be assembled to base 1 with one touch.

Then, in order to measure the follow-up of the movable iron pieces 43a, 43b and confirm the contact pressure, the iron core 22 and the movable iron pieces 43a, 43b are
3b, when inserting the gauge so as to make contact with the lower edge of the gauge insertion hole 19a, for example,
Since the lower edge of the gauge insertion hole 19a and the magnetic pole surface of the magnetic pole piece 26, that is, the surface of the magnetic shielding plate 27, are substantially flush with each other,
The gauge is reliably inserted between the magnetic pole piece 26 of the iron core 22 and the movable iron piece 43a while being guided by the lower edge of the gauge insertion hole 19a. Similarly, when the gauge is inserted so as to come into contact with the upper edge of the gauge insertion hole I9b, the gauge is inserted between the iron core 22 and the movable iron piece 43b.

The movable block 4 is connected to the base 1 by support shafts 40a and 40b.
Since both ends are supported by the shaft holes 17a and 17b, it has high strength against external shocks and vibrations.

Moreover, since the shaft lengths of the support shafts 40a and 40b are very short,
Due to the suction force generated during operation and the spring force of the movable contact piece 36, there is no deformation especially at high temperatures, and stable operation is performed.

In addition, the movable block 4 has shaft holes I7a and 17 of the base I.
A shaft hole 17a formed in the base l to be supported by the
, 17b.

On the other hand, a first fixed contact terminal 3/1 constituting the contact mechanism 3,
The second fixed contact terminal 33 and the movable contact terminal 35 are positioned by grooves 18a, 18b, and 18c formed in the base 1. That is, the shaft holes 17a, 17b and if 8a, 18b, 18c are all connected to the base 1.
, the mutual positional relationship can be determined with high precision. Therefore, the mutual positional relationship between the movable block 4 and the contact mechanism 3 can be accurately and easily determined.

Further, a shaft hole 17a serving as a rotation center of the movable block 4,
17b is provided closer to the axis of the movable contact piece 36 with respect to the axis of the iron core 22 of the electromagnet block 2, as shown in FIG.
When the slit 41 rotates around the movable contact piece 36
Press at a nearly right angle. As a result, the amount of sliding contact between the slit 41 and the movable contact piece 36 is reduced, and the generation of abrasion powder is suppressed, so that the contact portion does not have poor contact.

Next, the operation of this electromagnetic relay will be explained.

In FIG. 1, it is assumed that the movable iron piece 43a is magnetized to the north pole and the movable iron piece 43b is magnetized to the south pole by the permanent magnet 42, and the coil 20 is energized through the coil terminals 24a, 24b, and 24C to 22 magnetic pole piece 26 to S pole,
When the magnetic pole pieces 28a, 28b of the yoke 23 are excited to the N pole, these magnetic pole pieces 26, 28a, 28b and the movable iron piece 4
Based on the magnetic attraction force 1 repulsive force between 3a and 43b, the movable block 4 rotates in the direction of arrow a in the figure, and the slit 41 presses the movable contact piece 36 downward, so that the movable contact 34 The first fixed contact 30 is closed.

Also, the direction of the current to the coil 20 is reversed so that the magnetic pole piece 26 of the iron core 22 is set to the N pole, and the magnetic pole pieces 28a and 28 of the yoke 23 are
When b is excited to the S pole, the movable block 4 rotates in the direction of the arrow a'' in the figure, and its slit 41 presses the movable contact piece 36 upward, so that the movable contact 34 is separated from the first fixed contact 30. The second fixed contact 32 is closed.

In the above embodiment, the gauge insertion hole 19 is provided in the base l.
a, 19b are provided, but the present invention is not limited to this. Other fixing members, for example, the spool 21 are attached to the magnetic pole piece 26 of the iron core 22.
A gauge insertion hole may be provided in the spool 2I by extending it to the vicinity of the spool 2I.

(Effects of the Invention) As is clear from the above description, according to the present invention, by simply inserting the gauge into the gauge insertion hole, the gauge is guided by the edge of the gauge insertion hole and is aligned with the magnetic pole surface of the iron core. Since the gauge is guided into the gap between the magnetic pole faces of the movable iron piece, it is extremely easy to insert the gauge, which has the effect of shortening the work time for follow-up measurements of the movable iron piece, adjustment of contact pressure, etc.

[Brief explanation of the drawing]

1 to 4 show an electromagnetic relay according to the present invention, and the first
2 is a sectional view of the gauge insertion hole, FIG. 3 is a rear view, and FIG. 4 is an exploded perspective view. I...Base (fixed member), 2...Electromagnetic block, 22...Iron core, 26...Magnetic pole piece, 43a, 43b-=movable iron piece, 19a, 19b...Gage insertion hole, Patent applicant Tateishi Electric Co., Ltd. Agent Patent attorney Aoyama Ao and 1 other person 0b Figure 2 45r: 1't80

Claims (1)

[Claims] (1) A gauge insertion hole that communicates with the gap between the magnetic pole surface of the iron core and the magnetic pole surface of the movable iron piece is provided in the fixed member located near the iron core of the electromagnet block, and a part of the edge of the gauge insertion hole is An electromagnetic relay characterized by being formed substantially flush with the magnetic pole surface of the core.