JP3094665B2 - Polarized magnet device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarized electromagnet device,
The present invention relates to a thin polarized electromagnet device which is hardly affected by an external magnetic field and can be used for a small electromagnetic relay or the like.

[0002]

2. Description of the Related Art Conventionally, as a polarized electromagnet apparatus, for example, as shown in FIG. 8, there is an apparatus applied to an electromagnetic relay mounted on a surface of a printed circuit board.

That is, an electromagnet block 2 is housed in a box-shaped base 1, and a movable block 5 in which a movable iron piece 4 is insert-molded is placed on the upper surface of a permanent magnet 3 provided at the center of the upper surface of the electromagnet block 2. It is movably supported. In addition, 6 is a case.

[0004] The movable block 5 is rotated based on the excitation and demagnetization of the electromagnet block 2, and the end 4 of the movable iron piece 4 is moved.
The contacts are opened and closed by alternately contacting and separating a and 4b with the magnetic pole portions 2a and 2b of the electromagnet block 2.

[0005]

However, in the above-mentioned electromagnetic relay, since the movable block 5 is mounted on the upper surface of the electromagnet block 2, it becomes bulky and a thin electromagnet device cannot be obtained. Moreover, in the above-mentioned electromagnetic relay, since the joint surfaces between the magnetic pole portions 2a, 2b of the electromagnet block 2 and the both ends 4a, 4b of the movable iron piece 4 are open to the side, they are easily affected by an external magnetic field. On the contrary, the magnetic flux is also easy to leak. For this reason, since other electronic components cannot be arranged adjacent to each other, high-density surface mounting cannot be performed. In order to solve this problem, it is conceivable to cover the periphery of the magnetic pole portions 2a and 2b with a separate shield plate, but there is a problem that the number of components increases and the device becomes large.

[0006] In view of the above problems, it is an object of the present invention to provide a polarized electromagnet device which can be mounted at high density and is hardly affected by an external magnetic field, especially a thin type.

[0007]

In order to achieve the above object, a polarized electromagnet apparatus according to the present invention comprises a base and a flat, substantially C-shaped iron core having a coil wound around a central portion thereof. Notch in the vertical direction to form a groove, and alternately cut off upper and lower halves of the remaining side edges to form a pair of upper magnetic pole and lower magnetic poles, and the upper surface of the base. The two ends of the electromagnet part mounted on the core, the permanent magnet and the magnetic material piece stacked via the non-magnetic material are arranged in the groove of the iron core, and the center part is turned to the base as a pivot point. A rotator that supports both ends of the permanent magnet and the magnetic material piece alternately with the upper magnetic pole part and the lower magnetic pole part based on excitation and demagnetization of the electromagnet part by movably supporting the electromagnet part. It is. In addition, the rotating body arranges both ends of a pair of permanent magnets stacked via a non-magnetic material in the groove of the iron core so that magnetic poles vertically opposed to each other have different polarities, and has a center thereof. By rotatably supporting the base on the base as a rotation fulcrum, based on excitation and demagnetization of the electromagnet part,
Both end portions of the permanent magnet may alternately contact the upper magnetic pole portion and the lower magnetic pole portion.

[0008]

Therefore, according to the present invention, since the rotating body is located on the side of the electromagnet portion, it is not bulky.
In addition, since both ends of the rotating body are located in grooves formed by cutting the opposite end surfaces of the C-shaped iron core in the vertical direction and are not opened to the side, the rotating body is less susceptible to an external magnetic field,
Magnetic flux leakage is also reduced. For this reason, there is no need to attach a separate shield member around the magnetic pole portion, so that the number of components does not increase and the device does not increase in size.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the accompanying drawings of FIGS. This embodiment is a case where the present invention is applied to a thin electromagnetic relay.
0 and the rotating body 30.

The base 10 is a plate-like body having a substantially rectangular shape in a plane, on which an electromagnet section 20 and a rotating body 30 described later can be mounted at predetermined positions.

The electromagnet section 20 is formed by winding a coil 23 around the center of a plane substantially C-shaped iron core 21 via a spool 22, and the lead wire of the coil 23 is connected to coil terminals 24 and 25 provided on the iron core 21. Each one is soldered.

The iron core 21 has grooves 21a and 21b formed by notching the opposing front end surface in the vertical direction, and alternately cuts out upper and lower halves of the uncut side edges to form an upper magnetic pole portion. 26a, 27a and the lower magnetic pole portion 26b,
27b are respectively formed. Contact terminals 28 and 29 having fixed contacts 28a and 29a are provided along the upper magnetic pole portions 26a and 27a, respectively. The coil terminals 24, 25 and the contact terminals 28, 29 are of course insulated from the iron core 21.

The rotating body 30 is formed by stacking a permanent magnet 31 and a magnetic material piece 32 having the same planar shape via a non-magnetic material 33, and is rotatable on the base 10 with a rotating shaft 34 as a rotating fulcrum. , The magnetic pole portions 31a, 31b of the permanent magnet 31 are connected to the upper magnetic pole portions 26a, 26a,
27a are opposed to each other so as to be able to come and go. Note that, of the magnetic pole portions 31a, 31b of the permanent magnet 31, portions that come into contact with and separate from the fixed contacts 28a, 29a of the contact terminals 28, 29 are plated with gold to provide movable contacts 35a, 35b.

On the other hand, the ends 32a and 32b of the magnetic material piece 32 also face the lower magnetic poles 26b and 27b of the iron core 21 so as to be able to contact and separate from each other.

Therefore, when the electromagnet portion 20 is not excited, the magnetic pole portions 31a and 31b of the permanent magnet 31 are attracted to the upper magnetic pole portions 26a and 27a of the iron core 21 by the magnetic force of the permanent magnet 31 to close the magnetic circuit. In addition, the movable contacts 35a and 35b provided on the permanent magnet 31 contact the fixed contacts 28a and 29a, respectively, to close the electric circuit.

Then, the upper magnetic pole portions 26a, 27a of the iron core 21 are formed.
When the coil 23 is excited so as to repel the magnetic pole portions 31a and 31b of the permanent magnet 31, the magnetic pole portion 31 of the permanent magnet 31
a and 31b repel the upper magnetic pole portions 26a and 27a of the iron core 21, respectively, while both ends 32a and 32b of the magnetic material piece 32 are attracted to the lower magnetic pole portions 26b and 27b of the iron core 21, respectively. 30 rotates clockwise in FIG.
The movable contacts 35a, 35b of the permanent magnet 31 are fixed contacts 28a,
29a, the both ends 32a, 3 of the magnetic material piece 32 are separated.
2b is attracted to the magnetic pole portions 26b and 27b of the iron core 21 to close the magnetic circuit (FIG. 7).

Next, when the excitation of the coil 23 is released,
Due to the magnetic force of the permanent magnet 31, the rotating body 30 rotates in the opposite direction to the above and returns to the original state.

In the above-described embodiment, a description has been given of the case where the rotating body is constituted by a permanent magnet and a magnetic material piece and is of a self-return type. However, the invention is not limited to this. It may be of a self-holding type by being composed of a set of permanent magnets stacked in two stages. However, in this case, the magnetic poles of the upper and lower permanent magnets must have different polarities.

In the above embodiment, the contact terminals 28,
Although the case where 29 is disposed on the upper magnetic pole portions 26a and 27a of the iron core 21 and applied to the normally closed electromagnetic relay has been described, the present invention is not limited to this, and the magnetic pole portions 26b and 2 of the iron core 21 are not limited to this.
The contact terminals 28 and 29 may be arranged at 7b to form a normally-open electromagnetic relay.

Further, the iron core 21 may be formed by laminating plate-shaped magnetic materials, and the permanent magnets 31 and the magnetic material pieces 32 may be arranged upside down.

[0021]

As is apparent from the above description, according to the polarized electromagnet apparatus according to the present invention, since the rotating body is located on the side of the electromagnet section, if it is bulky as in the conventional example. Therefore, a thin polarized electromagnet device can be obtained. In addition, since both ends of the rotating body are located in the grooves formed by cutting the tip end surface of the iron core in the vertical direction, it is less affected by an external magnetic field than the conventional example, and the leakage magnetic flux is reduced. . For this reason, other electronic components can be arranged close to each other, so that the mounting density can be increased, and there is no need to provide a separate shield member, so that the number of components does not increase and a small polarized electromagnet device can be provided. There is an effect that it can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an electromagnetic relay to which a polarized electromagnet device according to the present invention is applied.

FIG. 2 is a front view showing an embodiment of an electromagnetic relay to which the polarized electromagnet device according to the present invention is applied.

FIG. 3 is a schematic diagram showing a contact mechanism of an electromagnetic relay to which the polarized electromagnet device according to the present invention is applied.

FIG. 4 is a schematic plan view showing a state before operation of an electromagnetic relay to which the polarized electromagnet device according to the present invention is applied.

FIG. 5 is a schematic plan view showing an electromagnetic relay to which the polarized electromagnet device according to the present invention is applied after operation.

FIG. 6 is a schematic plan view showing a state before operation of an electromagnetic relay to which the polarized electromagnet device according to the present invention is applied.

FIG. 7 is a schematic plan view showing a state after the operation of the electromagnetic relay to which the polarized electromagnet device according to the present invention is applied.

FIG. 8 is an exploded perspective view showing an electromagnetic relay to which a polarized electromagnet device according to a conventional example is applied.

[Explanation of symbols]

10: base, 20: electromagnet part, 21: iron core,
21a, 21b ... groove, 23 ... coil, 26a, 27
a: upper magnetic pole portion, 26b, 27b: lower magnetic pole portion, 30: rotating body, 31: permanent magnet, 31a, 31b: magnetic pole portion,
32: Magnetic material pieces, 32a, 32b: End portions, 33: Non-magnetic material pieces, 34: Rotating shaft.

Continuation of the front page (72) Inventor Kazumi Sako 10 Okado Dodo-cho, Ukyo-ku, Kyoto-shi, Kyoto Omron Corporation (58) Field surveyed (Int. Cl. ⁷ , DB name) H01F 7/14

Claims (2)

(57) [Claims] A groove is formed by vertically cutting each of opposing distal end faces of a base and a plane substantially C-shaped iron core having a coil wound in a central portion, and a groove is formed on both sides of the uncut side. A half and a lower half are alternately cut to form a pair of upper and lower magnetic pole portions, and an electromagnet portion mounted on the upper surface of the base and a permanent magnet and a magnetic material piece stacked via a non-magnetic material. By arranging both ends in the groove of the iron core, and rotatably supporting the center part on the base with the center part as a fulcrum, the permanent magnet and the magnetic material are excited based on the excitation and demagnetization of the electromagnet part. A rotating body that alternately abuts both ends of the material piece with the upper magnetic pole portion and the lower magnetic pole portion. 2. A base and a flat C-shaped iron core having a coil wound in a central portion thereof are formed by vertically cutting opposing distal end surfaces of respective opposing end surfaces to form grooves, and are formed on both side edges left uncut. A half and a lower half are alternately cut to form a pair of upper and lower magnetic pole portions, and a non-magnetic material such that the electromagnet portion mounted on the upper surface of the base and the upper and lower opposed magnetic poles have different polarities. By disposing both end portions of a set of permanent magnets stacked in the groove of the iron core, and rotatably supporting the center portion as a pivot point on the base, the electromagnet portion And a rotating body that alternately abuts both ends of the permanent magnet with the upper magnetic pole and the lower magnetic pole based on excitation and demagnetization.