JPH0347295Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an electromagnet 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 is U-shaped in plan and holds a permanent magnet 55 from both ends in the direction of magnetization. This electromagnetic device has a coil 57
By the action of the permanent magnet 55, the armature block 56 moves 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 the arrow K, the armature block 56 tilts in the direction of the arrow M, as shown in the figure, and moves in the direction of the 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 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. and an armature block in which two pieces of magnetic material sandwich a permanent magnet from both ends in the direction of magnetization. , both of these blocks are arranged such that at least a portion of the permanent magnet is between the opposing magnetic poles.
Two pieces of magnetic material are inserted into two gaps between the central magnetic pole part and the opposing magnetic pole part, and the armature block is sandwiched between the two coil frames and moves forward and backward. The gist is an electromagnetic device that looks like this.

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. One iron core 13 is passed through two coil frames 11 and 12. A part of the iron core 13 between the two coil frames 11 and 12 serves as a central magnetic pole part 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. Notches 19a and 19b are provided on one of the opposite sides of this pair (on the opposing magnetic pole portion 17 side). As a result, the frame-shaped yoke 18 has an asymmetrical shape with the iron core 13 as a boundary. The central magnetic pole section 14 and the opposing magnetic pole sections 16 and 17 are connected to the coil 11a and/or the opposite magnetic pole sections 16 and 17.
Alternatively, the polarity of the coil 12a is changed by excitation of 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.

In the electromagnet block 1 and the armature block 2, the ends of the two magnetic pieces 21 and 22 on the same side face the central magnetic pole part 14 so that one end of the permanent magnet 23 is between the opposing magnetic pole parts 16 and 17. They are inserted into two gaps between the magnetic pole parts 16 and 17, respectively.

The operating state of this electromagnet device having such a configuration will be explained based on FIG. 2. When the armature block 2 is in the state shown in the figure, by energizing and exciting 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 N pole. , due to homopolar repulsion and different polarity attraction, the armature block 2 has two coil frames 11,
12 and moves in parallel in the direction of arrow B, and the magnetic piece 21 abuts the central magnetic pole part 14 and the magnetic piece 22 abuts one of the opposing magnetic pole parts 17, respectively. 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 opposite side of the yoke 18 on the opposing magnetic pole portion 17 side has a notch 19.
a, 19b are provided. This notch 19
a and 19b cause 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 17 side increases. 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 block 2 is sandwiched between the two coil frames 11 and 12 and moves in parallel in the direction of arrow A, and the magnetic body The piece 21 comes into contact with one of the opposed magnetic pole parts 16, and the magnetic piece 22 comes into contact with the central magnetic pole part 14, respectively, resulting in the state shown in FIG. 2.

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 while being sandwiched between the two coil frames 11 and 12.
When moving forward or backward, it no longer tilts, making the movement stable. Further, since single stabilization is achieved by making the yoke asymmetrical with respect to the iron core, the above-mentioned 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.

Another embodiment is shown in FIGS. 3 and 4.

As shown in the figure, in this embodiment, the notch 19
c is provided on the opposing magnetic pole portion 17. This embodiment differs from the previous embodiment only in the position of the notch. In this embodiment, as in the previous embodiment, when the coil 11a and/or the coil 12a is energized, the armature block moves in the direction of arrow B, and when the coil 11a, 12a is de-energized, it moves in the direction of arrow A. The notch 19c may have the shape of a notch 19a as shown in FIG.

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. 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 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 the yoke has an asymmetrical shape with respect to the iron core, and an armature block has two magnetic pieces sandwiching a permanent magnet from both ends in the direction of magnetization. It is equipped with and,
Both of these blocks are arranged so that the ends of the two magnetic pieces on the same side are inserted into the two gaps between the central magnetic pole part and the opposite magnetic pole parts, so that at least a part of the permanent magnet is between the opposite magnetic pole parts. 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 which 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 the invention, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of another embodiment, and FIG. 4 is a plan view of the same. FIG. 5 is a perspective view showing another example of the notch shape shown in FIG. 4, and FIG. 6 is a plan view showing a conventional example of an 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, 1
9a, 19b, 19c, 19d...notch, 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 that faces 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. An electromagnetic block with an asymmetrical shape,
and an armature block formed by two pieces of magnetic material sandwiching a permanent magnet from both ends in the direction of magnetization. The body pieces are inserted into the two gaps between the central magnetic pole part and the opposing magnetic pole part, and the armature block is sandwiched between the two coil frames so that it can move forward and backward. Electromagnetic 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) Utility model registration claims Paragraph 1 or 2 in which the asymmetric structure is constituted by providing a notch on one side of the yoke bordering the iron core.
Electromagnetic device as described in section. (4) The electromagnet device according to claim 3 of the utility model registration claim, wherein the notch is provided in the opposing magnetic pole portion.