JPH02170506A - Polarized electromagnet device - Google Patents

Abstract

PURPOSE:To obtain a polarized electromagnet device of small size and high efficiency by a method wherein the center part of a center piece is brought in close to the magnetic pole located in the center of a permanent magnet. CONSTITUTION:The title electromagnet device has a yoke 1, a permanent magnet 2 and an armature, the yoke 1 has an approximately horizontal U-shape, and the surfaces of a pair of side pieces 8 and 8 located at both ends of an intermediate piece 4 are used as pole-faces 5 and 6. A coil 7 is wound on the intermediate piece 4, the permanent magnet 2 is arranged between a pair of side pieces 8 and 8, a homopolar pole S is provided at a position close to the side pieces 8 and 8, and a heteropolar pole N is provided at the center position between the side pieces 8 and 8. The armature 3 is formed in a horizontal U-shape and has a pair of armature pieces 9 and 10 which come in contact with or separated from the pole-faces 5 and 6, the center piece 11 of the armature 3 faces the opposite direction of the intermediate piece 4, the center piece 11 approaches the center pole N of the permanent magnet, and a pivotally- supported part 12 is provided in the center of the center piece 11. As a result, the contact surface of the pole faces 5 and 6, and armature pieces 9 and 10 can be made larger even when the overlapping side of the armature 3 with the yoke 1 is thinned off, high efficiency is obtained, and the device can be made small in size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polar electromagnet device commonly used in electromagnetic relays for controlling communication equipment, etc.

[Conventional technology]

A conventional example is shown in FIG.
A permanent magnet 32 is interposed between contact portions 36a and 36b at both ends. The permanent magnet 32 has both ends thereof magnetized with the same polarity, for example, a magnetic pole S, and a central part thereof with a magnetic pole N, and a fulcrum support recess 33 is formed in the central part. The armature 34 has a fulcrum protrusion 35 in the center that is supported by the fulcrum support recess 33, and contact portions 37a and 37b at both ends are contact portions 36a of the iron core 30.

36b.

In this polarized electromagnet device, the armature 34 has contact portions 36a, 3
6b, it is stabilized by the permanent magnet 32, and by exciting the coil 31, the armature 34 can be rotated in the opposite direction.

[Problem to be solved by the invention]

In recent years, when electric M1 relays are used in consumer products such as home appliances, there is a strong demand for low power consumption and miniaturization, and there is also a demand for electromagnetic devices used in electromagnetic relays to be highly efficient and compact.

However, although this polarized electromagnet device is small and highly efficient, when trying to further reduce the size, the iron core 30 becomes thinner or the plate thickness becomes thinner, and the contact portions 36a, 36
There was a drawback that the magnetic pole area of b became smaller and the efficiency decreased.

Therefore, an object of the present invention is to provide a polarized electromagnet device that can be made compact and highly efficient.

[Means to solve the problem]

A polarized electromagnet device according to claim il+ includes a yoke that is approximately U-shaped and has the same surface of a pair of side pieces at both ends of an intermediate piece as a magnetic pole surface, a coil wound around the intermediate piece, and the pair of side pieces at both ends of the intermediate piece. a permanent magnet disposed between the side pieces, having magnetic poles of the same polarity at positions close to the side pieces, and having a magnetic pole different from the magnetic pole at a central position between the side pieces; It is approximately U-shaped having a pair of armature pieces, the center piece of which is oriented opposite to the intermediate piece, the center of the center piece is close to the magnetic pole at the center of the permanent magnet, and the center of the center piece is close to the magnetic pole at the center of the permanent magnet. It is equipped with an armature with a pivot point on the side.

In the polarized electromagnet device according to claim (2), a part of the magnetic pole close to the side piece of the permanent magnet is extended to a surface of the magnetic pole surface opposite to a surface on which the armature piece approaches and separates. There is.

[Effect]

According to the polarized magnet device of claim f1+, since the center of the central piece is close to the central magnetic pole of the permanent magnet, the armature is attracted to the magnetic pole face facing any of the armature pieces. Also, when the coil is energized, the magnetic flux between the armature piece and the pole face on the side that is far apart increases, and the magnetic flux between the armature piece and the pole face on the side that is in contact decreases, so the center piece pivots. The armature rotates in the opposite direction using the branch as a fulcrum. In this case, since the yoke and armature are formed into a substantially U-shape, even if the direction in which the yoke and armature overlap is made thinner, the contact area between the magnetic pole surface and the armature piece can be increased, resulting in high efficiency. can.

According to the polarized electromagnet device of claim (2), a part of the magnetic pole close to the side piece of the permanent magnet extends to a surface of the magnetic pole surface opposite to a surface on which the armature piece approaches and separates. Therefore, the loss of magnetic flux between the magnetic pole of the permanent magnet and the side piece can be reduced, and the attractive force of the armature can be increased by improving the magnetic efficiency.

〔Example〕

A first embodiment of this invention will be described based on FIGS. 1 to 5. That is, this pole electromagnet device includes a yoke 1, a permanent magnet 2, and an armature 3.

The yoke 1 is approximately U-shaped, and the same surfaces of a pair of side pieces 8 at both ends of the intermediate piece 4 serve as magnetic pole faces 5 and 6.

The yoke l is made of an iron core material, is formed into a three-dimensional planar shape, and is formed by bending a pair of side pieces 8 in the thickness direction.

The coil 7 is wound around the intermediate piece 4.

The permanent magnet 2 is arranged between a pair of side pieces 8 and has magnetic poles S of the same polarity at a position close to the side pieces 8, and has a different magnetic pole S at a position in the center between the side pieces 8. Parts of both ends of the permanent magnet extend to a surface opposite to the magnetic pole surface of the iron core. That is, notches are formed at both ends, and the notches are brought into contact with the surface of the side piece 8 opposite to the magnetic pole surface 5.6 to increase the contact area.

The armature 3 includes a pair of armature pieces 9 that touch and separate from the magnetic pole faces 5 and 6.
10, the central piece 11 thereof faces opposite to the intermediate piece 4, and the central magnetic pole N of the permanent magnet 2
and has a pivot 12 in the center of the central piece 11.

The embodiment of the armature 3 is also formed in the same way as the yoke 1, with the central piece 11 being arranged so as to face the intermediate piece 4 with the permanent magnet 2 in between. Further, the pivot portion 12 is an example of a shaft.

According to this embodiment, since the center of the central piece 11 is close to the central magnetic pole N of the permanent magnet 2, the armature 3 is attached to the magnetic pole face 5.6 which faces one of the armature pieces 9.10. be attracted. Also, when the coil 7 is energized, the armature piece 9 on the far side
Or, since the magnetic flux between lO and the magnetic pole face 5 or 6 increases, and the magnetic flux between the contacting armature piece 10 or 9 and the M1 scraping face 6 or 5 decreases, the pivot point of the central piece 11 12
The armature 3 rotates in the opposite direction using the fulcrum as a fulcrum. In this case, since the yoke 1 and the armature 3 are formed into a substantially U-shape,
Even if the overlapping direction of the yoke 1 and the armature 3 is made thinner, the contact area between the magnetic pole surface 5.6 and the armature piece 9.10 can be increased, so that high efficiency can be achieved.

Also, the magnetic pole S close to the side piece 8 of the permanent magnet 2
A part of the permanent magnet 2 extends to the surface of the magnetic pole face 5.6 opposite to the surface on which the armature piece 9.10 approaches and separates.
The loss of magnetic flux between the magnetic pole S and the side piece 8 can be reduced, and the attractive force of the armature 3 can be increased by improving the magnetic efficiency.

Furthermore, if the shapes of the yoke 1 and the armature 3 are made the same, the mold can be shared, and costs including equipment costs can be reduced.

A second embodiment of the invention is shown in FIG.
, 10 is provided with a pivot 12 having a fulcrum projection as an example on the side surface facing the magnetic pole surface 5.6, and this pivot 12 is supported by a support part (not shown). 12
The structure of can be simplified.

A third embodiment of the present invention is shown in FIG. 7, that is, in this polarized 1i magnet device, the permanent magnet 2 is temporarily formed into a rectangular parallelepiped, which has the advantage of being simple in shape.

〔Effect of the invention〕

Claim (In the polarized magnet device No. 11, the yoke and the armature are formed in a substantially U-shape, so even if the overlapping direction of the yoke and the armature is made thinner, the contact area between the magnetic pole surface and the armature piece can be increased. This has the effect of making it highly efficient.

In the polarized electromagnet device according to claim (2), a part of the magnetic pole close to the side piece of the permanent magnet is extended to a surface of the magnetic pole surface opposite to a surface on which the armature piece approaches and separates. Therefore, the magnetic flux loss between the magnetic poles of the permanent magnet and the side pieces can be reduced, and the attractive force of the armature can be increased by improving the magnetic efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a front view of FIG. 5 is a perspective view of FIG. 1 seen from a different angle, FIG. 6 is a perspective view of the second embodiment, FIG. 7 is a perspective view of the third embodiment, and FIG. 8 is a perspective view of the second embodiment. It is a perspective view of a conventional example. ■... Yoke, 2... Permanent magnet, 3... Armature,
4... Intermediate piece, 5.6... Magnetic pole surface, 7... Coil, 8... Side piece, 9, IO... Armature piece, 11... Center piece, 12... Cardinal branch diagram, foot diagram, diagram

Claims (2)

[Claims] (1) A yoke that is approximately U-shaped and has the same surface of a pair of side pieces at both ends of the middle piece as a magnetic pole surface, a coil wound around the middle piece, and a yoke disposed between the pair of side pieces. a permanent magnet having magnetic poles of the same polarity at positions close to the side pieces, and a magnetic pole different from the magnetic pole at a central position between the side pieces; and a pair of armature pieces that approach and separate from the magnetic pole faces. a substantially U-shaped contact having a central piece facing opposite to the intermediate piece, the center of the central piece approaching the magnetic pole at the center of the permanent magnet, and a pivot point provided at the center of the central piece; A polarized electromagnet device equipped with a pole. (2) A part of the magnetic pole close to the side piece of the permanent magnet is extended to a surface of the magnetic pole surface opposite to a surface on which the armature piece approaches and separates. Polar magnet device.