JPH0222522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electromagnetic device used for purposes such as driving a contact mechanism in a polarized relay.

[Background Art] Recently, there has been a demand for miniaturization of polarized relays, and a compact electromagnet device convenient for use therein has been developed. That is, as shown in FIG. 1, an electromagnetic block 1 is constructed into an E-shape in plan by placing an iron core 3 in the middle of a yoke 2, and is permanently attached with two magnetic pieces 6, 6. An example is a combination of permanent magnet blocks 5 formed into a U-shape in plan by sandwiching a magnet 7 therebetween. In the figure, 4 is a coil. The electromagnetic block 1 and the permanent magnet block 5 are such that the other side ends of both magnetic pieces 6, 6 of the permanent magnet block are inserted into two gaps formed by the central magnetic pole part 8a and the opposing magnetic pole parts 8b, 8c of the electromagnetic block 1. They are combined in such a way that they are When the direction of the current flowing through the coil 4 is changed, the permanent magnet block 5 or the electromagnetic block 1 moves in the forward and reverse directions as shown by the arrows in the figure.

In this electromagnet device, as shown in FIG.
Hole 2 formed in the center block of U-shaped yoke 2
The iron core 3 was press-fitted into a and caulked. However, with miniaturization, if the plate thickness of the yoke is reduced, this crimping becomes difficult and magnetic resistance increases.
Another problem was that it was difficult to achieve positional accuracy between the central magnetic pole section 8a and the opposing magnetic pole sections 8b and 8c.

Further, even though the latching type and single stable type electromagnet devices are of the same type, they are constructed using different parts. This has led to
As a wide variety of electromagnetic devices have been developed and the number of molds and parts has increased,
This caused a lot of management loss.

[Purpose of the invention]

In view of the above points, this invention is easy to assemble even when miniaturized, has low magnetic resistance,
Another object of the present invention is to provide an electromagnet device that has good positional accuracy and can be configured as either a latching type or a single stable type electromagnet device using the same component parts.

[Disclosure of the invention]

In order to achieve the above object, an electromagnet device according to the present invention includes an electromagnetic block having opposing magnetic pole parts facing each other with one central magnetic pole part in between, and two magnetic material pieces whose same side ends are connected to a permanent magnet. A permanent magnet block is provided which is sandwiched from both sides in the magnetization direction, and the other end of the two magnetic material pieces of the permanent magnet block is inserted into the two gaps formed by the central magnetic pole part and the opposing magnetic pole part of the electromagnetic block. In an electromagnet device in which a permanent magnet block is combined with an electromagnetic block, two U-shaped pieces with asymmetric structure on opposite sides are overlapped to form an E-shape, and a coil is wound around this overlapped part. The center magnetic pole part is provided at the end of the U-shaped piece on the overlapping part side, and the opposing magnetic pole part is set at the end part on the non-overlapping part side. This will be explained in detail below based on the drawings showing one embodiment thereof.

As shown in FIG. 3, the electromagnet device according to the present invention consists of an electromagnet block 1' and a permanent magnet block 5.

The electromagnetic block 1' has two U-shaped pieces 10 with an asymmetrical structure on opposite sides, with one (short piece) 9a of the opposite side being shorter than the other (long piece) 9b as shown in FIG.
As shown in Fig. 3, the rectangles 9b are placed together to form an E-shape,
It serves as a magnetic path component. The U-shaped piece 10 is made by bending a plate made of a magnetic material such as iron into a U-shape. The overlapping portion 3' of the two U-shaped pieces 10, 10 becomes an iron core,
It is inserted into a hole in a coil frame (not shown) and fixed integrally, and the coil 4 is wound around it. The other portions 2' of the U-shaped pieces 10, 10 serve as yokes. The end of the two U-shaped pieces 10, 10 on the overlapping part 3' side becomes the central magnetic pole part 8a, and the end on the side other than the overlapping part becomes the opposing magnetic pole part 8.
b, 8c. These magnetic pole parts 8a, 8
b and 8c may be formed by magnetically connecting a material different from that of the U-shaped piece 10 to the U-shaped piece 10.

This electromagnetic block 1' consists of a U-shaped permanent magnet block 5 and both magnetic pieces 6, 6, as in the conventional case.
The other end is the central magnetic pole part 8a and the opposing magnetic pole part 8.
b and 8c are inserted into the two gaps formed by the parts 8c and 8c. When the direction of the current flowing through the coil 4 is changed, the permanent magnet block 5 or the electromagnetic block 1' moves in the forward and reverse directions.

The electromagnet device shown in FIG. 3 is a so-called latching type electromagnet device, which stabilizes in that state after forward and reverse movement when it is in a non-excited state.As shown in FIG. , 10 short pieces 9a
By attaching the long piece 9b, the magnetic circuits on both sides bordering on the central magnetic pole part become asymmetrical, and it is possible to easily construct a so-called single-stable type electromagnetic device that is stable in one direction in a non-excited state. can. To form a latching type, the short pieces 9a may be attached to each other.

Instead of the U-shaped piece 10 shown in FIG.
As shown in the figure, a U-shaped piece 13 having an asymmetric structure on opposite sides has a hole 12 formed at the tip of one of the opposite sides 11a.
may also be used. Using this U-shaped piece 13, as shown in FIG.
By aligning them together, a latching type electromagnet device can be constructed, and as shown in FIG. Then, a single stable type electromagnet device can be constructed. That is, when two U-shaped pieces are combined so that the shapes on both sides of the electromagnetic block are symmetrical, a latching type is obtained, and when they are combined asymmetrically, a single stable type is obtained.

In addition to the embodiments shown in FIGS. 4 and 6, the U-shaped piece may also be constructed by having different plate thicknesses on the opposite sides or by providing a non-magnetic piece on the inner surface of the tip of one of the opposite sides. good. In short, it is sufficient that the opposite sides of the U-shaped piece have an asymmetric structure.

〔Effect of the invention〕

As seen above, the electromagnet device according to the present invention includes an electromagnet block having opposing magnetic pole parts facing each other with one central magnetic pole part in between, and two magnetic material pieces whose same side ends hold a permanent magnet. and a permanent magnet block which is sandwiched from both sides in the magnetic direction, and the other end of the two magnetic pieces of the permanent magnet block is inserted into the two gaps formed by the central magnetic pole part and the opposing magnetic pole part of the electromagnetic block. In an electromagnet device combined with an electromagnetic block, two U-shaped pieces with asymmetric structure on opposite sides are overlapped to form an E-shape, and a coil is wound around this overlapped part to form a coil. Since the central magnetic pole part is set at the end of the overlapping part side of the shape piece, and the opposing magnetic pole part is set at the end part of the non-overlapping part side, the gap created by the central magnetic pole part 8a and the opposing magnetic pole parts 8b and 8c is The distances A and B (shown in FIG. 3) are determined only by the machining accuracy of the U-shaped piece, and are not dependent on the caulking accuracy. Since the machining accuracy of the U-shaped piece is high, the present invention improves the positional accuracy (dimensional accuracy) of the magnetic pole part, stabilizes the magnetic attraction force characteristics, improves the surface contact at the magnetic pole part, and improves the magnetic efficiency. Effects such as improvement are brought about. Since it does not require caulking, the electromagnetic device of the present invention is easy to assemble, and an increase in magnetic resistance due to caulking is prevented. Since the plate thickness of the yoke can be made thinner, further miniaturization is possible.

Moreover, since the opposite sides of the U-shaped pieces have an asymmetric structure, by changing the combination of the U-shaped pieces, the shapes on both sides of the electromagnetic block bordering the central magnetic pole can be configured to be either symmetrical or asymmetrical. can. Therefore, both a latching type and a single stable type electromagnetic device can be constructed using the same components. As a result, the number of parts and molds can be reduced, and management losses can be greatly reduced.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional electromagnet device, Fig. 2 is an exploded perspective view of a conventional yoke and iron core, Fig. 3 is a plan view showing an embodiment of the electromagnet device according to the present invention, and Fig. 4 is the same as above. FIG. 5 is a plan view showing an embodiment of an electromagnet device different from that shown in FIG. 1 using the U-shaped piece shown in FIG. 4, and FIG. A perspective view showing another example of a glyph piece;
7 and 8 are plan views showing an embodiment of an electromagnet device constructed using the U-shaped piece shown in FIG. 6. FIG. 1'...Electromagnetic block, 3'...Overlapping portion, 4...Coil, 5...Permanent magnet block, 6
...Magnetic material piece, 7...Permanent magnet, 8a...Central magnetic pole part, 8b, 8c...Opposing magnetic pole part, 9a, 9b,
11a, 11b...opposite side, 10, 13...U-shaped piece, 12...hole.

Claims (1)

[Scope of Claims] 1. An electromagnetic block having opposing magnetic pole parts facing each other with one central magnetic pole part in between, and the same side ends of two magnetic pieces sandwiching a permanent magnet from both sides in the direction of magnetization. The other end of the two magnetic pieces of the permanent magnet block is inserted into the two gaps formed by the central magnetic pole part and the opposing magnetic pole part of the electromagnetic block, so that the permanent magnet block is connected to the electromagnet. In the electromagnet device combined with the block, two U-shaped pieces with asymmetrical structure on opposite sides are overlapped to form an E-shape, and a coil is wound around this overlapped part to form a U-shaped piece. An electromagnet device characterized in that a central magnetic pole part is provided at an end on the overlapping part side, and an opposing magnetic pole part is provided at an end on the non-overlapping part side. 2. The electromagnet device according to claim 1, wherein one of the opposing sides of the U-shaped piece is shorter than the other, resulting in an asymmetrical structure. 3. The electromagnet device according to claim 1, which has an asymmetric structure by forming a hole on one of the opposite sides of the U-shaped piece.