JPH0347298Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an electromagnetic device used for opening and closing contacts of a polarized relay.

[Background technology]

Conventionally, electromagnetic devices used in polarized relays are
It was a balanced armature system in which an armature block and an electromagnet block were stacked vertically. For this reason, it is difficult to reduce the thickness of the relay, and when configured as a polarized relay, it has been impossible to obtain an ultra-thin relay.

Therefore, as shown in Figure 6, an electromagnetic device was developed that was designed to be thinner. This electromagnetic device is
As shown in the figure, there is an electromagnetic block 53 in which one end of an iron core 52 is connected to the inside of a planar U-shaped yoke 51 to form a planar E-shape, and two magnetic pieces 54, 54.
is combined with an armature block 56 which has a U-shape in plan, sandwiching a permanent magnet 55 from both ends in the direction of magnetization. This electromagnet device uses the action of a coil 57 and a permanent magnet 55 to move the armature block 5.
6 is designed to move forward and backward in the directions of arrows K and L. However, since the permanent magnet 55 is outside the planar U-shaped yoke 51, the armature block 56
moves in the direction of arrow K, armature block 5
6 tilted in the direction of arrow M as shown in the figure, and when it moved in the direction of arrow L, the armature block 56 tilted in the direction of arrow N, making the operation extremely unstable. In particular, when one end of the planar U-shaped yoke 51 was cut out in order to make such an electromagnet device single-stable, the inclination in the direction of the cutout was severe.

[Purpose of invention]

In view of the above, the object of this invention is to provide a single stable type electromagnet device that is thin and has a stable armature block operation.

[Disclosure of invention]

In this invention, in order to achieve the above object, two coil frames each having a coil wound thereon are arranged in the same axial direction, and an iron core connected to a yoke is passed through the two coil frames. The part of the iron core between the two coil frames is the central magnetic pole part, and the part of the yoke that faces this between them is the opposing magnetic pole part, and when the coil is energized, the central magnetic pole part and the opposing magnetic pole part have different polarities. an electromagnetic block in which one of the opposed magnetic pole parts is closer to the central magnetic pole part than the other, and an armature block in which two magnetic pieces sandwich a permanent magnet from both ends in the direction of magnetization. Both blocks have at least a part of the permanent magnet inserted between the opposing magnetic pole parts, and two pieces of magnetic material are respectively inserted into the two gaps between the central magnetic pole part and the opposing magnetic pole part. The gist is an electromagnet device in which the armature block is inserted between two coil frames and moved forward and backward.

This will be explained in detail below based on the drawings showing one embodiment thereof.

As shown in FIGS. 1 and 2, this electromagnet device includes an electromagnet block 1 and an armature block 2. As shown in FIGS. The electromagnetic block 1 has two coil frames 11 and 12 arranged in the same axial direction. Coils 11a and 12a are wound around the two coil frames 11 and 12, respectively. At the same time, one iron core 13 is passed through the two coil frames 11 and 12. two coil frames 11,
A part of the iron core 13 between the magnetic poles 12 serves as a central magnetic pole portion 14. Both ends of the iron core 13 are connected to a pair of opposite sides of a frame-shaped yoke 18 by caulking or the like. Another pair of opposite sides of the frame-shaped yoke 18 form opposing magnetic pole parts 16 and 17 that face each other with the central magnetic pole part 14 in between. One side of the opposing magnetic pole part 17
is bent inside the frame-shaped yoke 18.
As a result, the opposing magnetic pole portion 17 is closer to the center magnetic pole portion 14 than the other opposing magnetic pole portion 16 . The central magnetic pole section 14 and the opposing magnetic pole sections 16 and 17 have different polarities due to the excitation of the coil 11a and/or the coil 12a.

The armature block 2 includes two magnetic pieces 21, 2
2 sandwich the permanent magnet 23 from both ends in the direction of magnetization.

The electromagnet block 1 and the armature block 2 have one end of a permanent magnet 23 inserted between opposing magnetic pole parts 16 and 17, and two magnetic pieces 21 and 22.
are inserted into two gaps between the central magnetic pole section 14 and the opposing magnetic pole sections 16 and 17, respectively.

The operating state of this electromagnet device having such a configuration will be explained based on FIGS. 2a and 2b. When the armature block 2 is in the state shown in FIG. 2a, by energizing the coil 11a and/or the coil 12a, the central magnetic pole part 14 becomes the S pole and the opposing magnetic pole parts 16 and 17 become the S pole. When set to N pole, the armature block 2 is sandwiched between the two coil frames 11 and 12 and moves in parallel in the direction of arrow A due to the repulsion of the same polarity and attraction of the different polarity, and the magnetic piece 22 comes into contact with the central magnetic pole part 14, This can be seen in Figure 2b. When the current to the coils 11a and 12a is cut off from this state, only the attractive force of the permanent magnet 23 is applied to the armature block 2. As described above, one of the opposing magnetic pole sections 17 is closer to the central magnetic pole section 14 than the other one 16 . This causes a difference in the magnetic resistance of the two magnetic circuits formed with the iron core as a boundary, and the magnetic resistance of the magnetic circuit on the opposing magnetic pole portion 16 side increases. Therefore, the attractive force toward the opposing magnetic pole section 17 side becomes larger than the attractive force toward the opposing magnetic pole section 16 side, and the armature block 2
2 and moves in parallel in the direction of arrow B, the magnetic piece 22 comes into contact with one of the opposing magnetic pole parts 17, and the magnetic piece 21 comes into contact with the central magnetic pole part 14, respectively, resulting in the state shown in FIG. 2a.

As seen above, in this electromagnet device, part or all of the permanent magnet 23 is
Electromagnetic block 1 and armature block 2 are combined so that they are inserted between them, and armature block 2 is inserted into electromagnetic block 1. vertical length) can be made thinner. Moreover,
When the armature block 2 moves forward or backward in parallel in the directions of arrows A and B, it is guided by being sandwiched between the two coil frames 11 and 12. It no longer leans to the side, and its movements have become more stable. Further, since single stabilization is achieved by bringing one of the opposing magnetic pole portions closer to the central magnetic pole portion than the other, the effect of stabilizing the operation is not impaired due to single stabilization. That is, from these points, it becomes possible to realize a single stable type electromagnet device which is thin and has a stable operation of the armature block.

In the embodiment described above, since the frame-shaped yoke 18 surrounds the coil frames 11, 12 and the armature block 2, leakage of magnetic flux is small, resulting in an electromagnet device with good magnetic efficiency.

Note that the electromagnet device according to this invention is not limited to the above embodiment. For example, it is preferable from the viewpoint of mechanical strength that one core is passed through two coil frames as in the above embodiment, but separate cores are passed through two coil frames, and these cores face each other. The end portion may serve as the central magnetic pole portion.
The sliding part of the coil frame with the armature block is
By using a material with a small coefficient of friction, forward and reverse movement of the armature block becomes smooth.

[Effect of idea]

As seen above, in the electromagnet device according to this invention, two coil frames each having a coil wound thereon are arranged with the same axial direction, and an iron core connected to a yoke is passed through the two coil frames. A part of the iron core between the two coil frames is the central magnetic pole part, and a part of the yoke that faces the two coil frames is the opposing magnetic pole part, and when the coil is energized, the central magnetic pole part and the opposing magnetic pole part are separated. An electromagnetic block has different polarities, and one of the opposed magnetic pole parts is closer to the central magnetic pole part than the other, and two magnetic pieces sandwich a permanent magnet from both ends in the direction of magnetization. It is equipped with a pole block. Both blocks are arranged such that at least a part of the permanent magnet is inserted between the opposing magnetic pole parts, and two magnetic pieces are inserted into the gap between the central magnetic pole part and the opposing magnetic pole part. The armature block is sandwiched between two coil frames so that it can move forward and backward. Therefore, it is possible to realize a single stable type electromagnet device that is thin and has a stable operation of the armature block.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the electromagnet device according to this invention, FIGS. 2a and 2b are plan views of the same, and FIG. 3 is a plan view showing a conventional electromagnet device. 1... Electromagnet block, 2... Armature block, 11, 12... Coil frame, 11a, 12a...
...Coil, 13...Iron core, 14...Central magnetic pole part,
16, 17...Opposing magnetic pole part, 18...Yoke, 2
1, 22...Magnetic material piece, 23...Permanent magnet.

Claims (1)

[Claims for Utility Model Registration] (1) Two coil frames each having a coil wound thereon are arranged with the same axial direction, and an iron core connected to a yoke is passed through the two coil frames,
A part of the iron core between the two coil frames is the central magnetic pole part,
A part of the yoke facing each other with this in between becomes an opposing magnetic pole part, and by excitation of the coil, the central magnetic pole part and the opposing magnetic pole part have different polarities, and one of the opposing magnetic pole parts The device includes an electromagnetic block that is closer to the center magnetic pole than the other, and an armature block that is formed by two pieces of magnetic material sandwiching a permanent magnet from both ends in the direction of magnetization. is inserted between the opposing magnetic pole parts, and two magnetic pieces are inserted into the two gaps between the central magnetic pole part and the opposing magnetic pole part, respectively, so that the armature block is assembled. An electromagnetic device that is sandwiched between two coil frames and is designed to move forward and backward. (2) The yoke is frame-shaped and surrounds the two coil frames and the armature block, and one of the opposing magnetic pole parts is bent inside the frame-shaped yoke so that the central magnetic pole part is closer to the other than the other. An electromagnetic device according to claim 1 of the utility model registration claim.