JPH0347296Y2 - - 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 electromagnetic block were stacked vertically. For this reason, it is difficult to make the electromagnet device thinner, and
When configured as a relay, it was not possible 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 located outside the planar U-shaped yoke 51, when the armature block 56 moves in the direction of arrow K, the armature block 56
is tilted in the direction of arrow M as shown in the figure, and arrow L
When the armature block 56 moved in the direction of arrow N, 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 the invention] In view of the above, the object of the invention is to provide a single stable type electromagnet device which is thin and has a stable operation of the armature block.

[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. and an armature block in which two magnetic pieces of different shapes sandwich a permanent magnet from both ends in the direction of magnetization, and both of these blocks hold at least a portion of the permanent magnet. is between the opposing magnetic poles,
Two pieces of magnetic material are inserted into the gap between the central magnetic pole part and the opposing magnetic pole part, and the armature block is sandwiched between the two coil frames and moved forward and backward. Its gist is a modern electromagnetic device.

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

As seen in FIGS. 1 and 2a and 2b, this electromagnetic 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. 2
One iron core 13 is passed through two coil frames 11 and 12. Iron core 1 between two coil frames 11 and 12
3 serves as a central magnetic pole portion 14. Iron core 1
Both ends of 3 are connected to a pair of opposite sides of a frame-shaped yoke 18 by caulking or the like. Another set of opposite sides of the frame-shaped yoke 18 is the central magnetic pole portion 1
The magnetic pole portions 16 and 17 are opposed to each other with 4 in between. Central magnetic pole part 14 and opposing magnetic pole part 16,1
7 refers to the coil 11a and/or the coil 12
It has different polarities depending on the excitation of a.

The armature block 2 is made up of two magnetic pieces 21 and 22 of different shapes sandwiching a permanent magnet 23 from both ends in the direction of magnetization. The magnetic piece 21 has a U-shape, and the magnetic piece 22 has a flat plate shape.

The electromagnet block 1 and the armature block 2 are constructed so that the same end portions of the two magnetic pieces 21 and 22 are connected to the central magnetic pole portion 14 so that a part of the permanent magnet 23 is between the opposing magnetic pole portions 16 and 17. They are assembled so as to be inserted into two gaps between the opposing magnetic pole parts 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 and exciting the coil 11a and/or the coil 12a, the central magnetic pole portion 14 is made the S pole and the opposing magnetic pole portions 16 and 17 are made the N pole. When polarized, the armature block 2 is sandwiched between the two coil frames 11 and 12 and moves in parallel in the direction of arrow B due to the repulsion of the same polarity and attraction of the different polarity, and the magnetic piece 21 is attached to the central magnetic pole part 14. 22 abut on one side 17 of the opposing magnetic pole parts, as shown in FIG. 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 mentioned above, the two magnetic pieces 21 and 22 have different shapes. Due to the different shapes of the two magnetic pieces 21 and 22, there is 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 part 17 side is large. Become. Therefore, the attractive force toward the opposing magnetic pole section 16 side becomes larger than the attractive force toward the opposing magnetic pole section 17 side, and the armature block 2 is sandwiched between the two coil frames 11 and 12 and moves in parallel in the direction of arrow A. The body piece 21 is one of the opposing magnetic pole parts 16
Then, the magnetic pieces 22 come into contact with the central magnetic pole portions 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
Electromagnet block 1 and armature block 2 are combined so that they are located between the armature block 2 and the armature block 2.
Since the electromagnetic device is adapted to enter into the electromagnetic block 1, the thickness of the electromagnetic device (the length in the vertical direction in FIG. 1) can be reduced. Moreover, when the armature block 2 moves forward and 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, so that the armature block 2 moves forward and backward in the directions of arrows A and B. When you do this, it no longer tilts and its movement becomes stable.

Further, since single stabilization is achieved by making the shapes of the two magnetic pieces different, 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 two embodiments 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 would be preferable from the viewpoint of mechanical strength if one core was passed through two coil frames as in the above two embodiments, but if separate cores were passed through two coil frames, these cores The opposite ends of the magnetic pole may serve as the central magnetic pole. If a material with a small friction coefficient is used for the sliding portion of the coil frame with the armature block, forward and reverse movement of the armature block will be 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. It is equipped with an electromagnetic block having different polarities, and an armature block in which two magnetic pieces of different shapes sandwich a permanent magnet from both ends in the direction of magnetization. and,
Both blocks are arranged such that the two pieces of magnetic material are respectively inserted into two gaps between the central magnetic pole part and the opposing magnetic pole parts, such that at least a part of the permanent magnet is between the opposing magnetic pole parts. The armature block is sandwiched between two coil frames so that it can move forward and backward. Therefore,
It becomes 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, Fig. 2 a and b are plan views showing both states after the armature block has moved forward and backward, and Fig. 3 shows the electromagnet. This is a conventional example of the 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 yokes facing each other with this in between becomes the opposing magnetic pole part, and the central magnetic pole part and the opposing magnetic pole part have different polarities by excitation of the coil, and two electromagnetic blocks with different shapes.
and an armature block formed by two pieces of magnetic material sandwiching a permanent magnet from both ends in the direction of magnetization, and these two blocks are arranged so that at least a part of the permanent magnet is between the opposing magnetic pole parts. An electromagnet in which the pieces are inserted into the gap between the central magnetic pole part and the opposing magnetic pole part, and the armature block is sandwiched between two coil frames to move forward and backward. Device. (2) The electromagnet device according to claim 1, wherein the yoke has a frame shape and surrounds two coil frames and an armature block. (3) The electromagnet device according to claim 1 or 2, wherein the two magnetic pieces have different shapes, one of which is flat and the other is U-shaped.