JPH0347300Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an electromagnetic device used for opening and closing contacts of relays, etc.

[Background technology]

Conventionally, in order to make a polarized electromagnetic device single-stable, a non-magnetic "residual plate" was fixed to one side of the magnetic pole by welding or caulking, and a gap was forcibly formed. However, this required a lot of man-hours and was a major factor in increasing costs.

[Purpose of invention]

In view of the above, the purpose of this invention is to easily realize a single stable type in a polarized electromagnet device.

[Disclosure of invention]

In this invention, in order to achieve the above object, a first magnetic pole portion is provided at one end in the axial direction of the coil,
an electromagnetic block having a second magnetic pole section provided on the other end side, the first magnetic pole section and the second magnetic pole section having different polarities when the coil is excited; and two magnetic bodies. an armature block whose pieces sandwich a permanent magnet from both ends in the direction of magnetization;
and a second magnetic pole part are respectively inserted between one end part on the same side and the other end part on the same side of two magnetic material pieces, and the two blocks are combined. A convex portion in which the magnetic pole part and the second magnetic pole part are not on the same straight line but are offset, and the coil frame around which the coil is wound restricts forward or reverse rotation of the armature block. The gist is an electromagnet device characterized by having.

This invention will be explained in detail below based on drawings showing examples thereof.

1 to 3 show one embodiment of this invention. As shown in FIGS. 1 to 3, this electromagnet device 1 includes an electromagnet block 2 and an armature block 3. As shown in FIGS.

In the electromagnetic block 2, a first magnetic pole part 5a is provided at one end in the axial direction of the coil 4, and a second magnetic pole part 6a is provided at the other end. and the second magnetic pole portion 6a have different polarities. The coil 4 is wound around a coil frame 7 made of a synthetic resin molded product or the like.

The armature block 3 has two magnetic pieces 11, 1
2 sandwiching the permanent magnet 13 from both ends in the direction of magnetization, it is fitted and supported by a shaft 14, and is designed to rotate about this shaft 14 in the directions of arrows A and B.

The shaft 14 is provided, for example, as a molded article 15 of synthetic resin, and this molded article 15 is placed on the side of the coil 4 of the electromagnetic block 2, and the armature block 3 is fitted onto the shaft 14. Note that the shaft may be provided by other means.

The electromagnet block 2 and the armature block 3 are
The magnetic pole part 5a is inserted between the ends 11a and 12a on the same side of the two magnetic pieces 11 and 12, and the second magnetic pole part 6a is inserted between the two magnetic pieces 11 and 12.
It is inserted between the other end portions 11b and 12b on the same side of the two and combined.

In this embodiment, as shown in FIG.
One side of each of the L-shaped piece 5 and the second L-shaped piece 6 is inserted into a hole (not shown) in the coil frame 7 around which the coil 4 is wound (not shown) from both ends of the hole and overlaps with the first L-shaped piece 5. The other side tip 5a of the L-shaped piece 5 and the other side tip 6a of the second L-shaped piece serve as a first magnetic pole part and a second magnetic pole part. For this reason, the second
As shown in Figures a and b, the first magnetic pole part 5a and the second magnetic pole part 5a
The magnetic pole portion 6a is not on the same straight line but is shifted.
In this way, if only one of the two L-shaped pieces is turned over and overlapped on one side, and this part is used as the iron core,
Compared to the case where only one core is used, the core width is thicker and magnetic saturation is less likely to occur. By inserting the two L-shaped pieces into the holes of the coil frame from both ends and overlapping them, they can be easily fixed without requiring a lot of man-hours. Furthermore, since it is sufficient to add one more part to the same shape, it is not a major factor in increasing costs.

The operating state of this electromagnet device 1 having such a configuration will be explained next. In the state shown in Fig. 2b, when a current is passed through the coil 4 to excite the first magnetic pole part 5a to the N pole and the second magnetic pole part 6a to the S pole, homopolar repulsion and different polarity attraction occur. The armature block 3 rotates about the shaft 14 in the direction of arrow A. At this time. The armature block 3 comes into contact with the protrusions 7a and 7b of the coil frame 7, and its rotation in the direction of arrow A is restricted, resulting in the state shown in FIG. 2a. In this state, a gap C is created between the first magnetic pole part 5a and one end of the magnetic body 12a attracted thereto, and a gap C is created between the second magnetic pole part 6a and one end of the magnetic body attracted thereto. A gap D is created between the portion 11b and the portion 11b. Therefore, in this state, the permanent magnet 1
Although the magnetic resistance of the magnetic circuit due to the magnetic flux of 3 is large,
This is the state (excited state) while this excitation continues.
is maintained. In the electromagnetic device according to this invention, the polarity of the current in the coil that brings about the excited state is determined by the direction of magnetization of the permanent magnet, and if the polarity is opposite, the magnet will not be in the excited state. When the current in the coil 4 is cut off and the excitation is stopped in the excitation state, the armature block 3 rotates about the shaft 14 in the direction of arrow B, and the one end of the magnetic body 11a becomes the first magnetic pole part 5a. At the same time, the one end portion 12b of the magnetic body comes into contact with the second magnetic pole portion 6a, resulting in the state shown in FIG. 2b. In this state, a closed magnetic path is created by the magnetic flux of the permanent magnet 13, and the magnetic resistance is much smaller than in the previous state, so this state (non-excited state) is maintained as long as no excitation is performed. . In addition,
In the electromagnet device according to this invention, the armature block may be in contact with the convex portion of the coil frame even in a non-energized state.

In this way, the electromagnetic device according to this invention is
The first magnetic pole part and the second magnetic pole part are not on the same straight line but are offset, and the coil frame around which the coil is wound has a convexity that limits forward or reverse rotation of the armature block. When the armature block rotates forward or backward, a residual gap can be forcibly formed between the parts that attract each other. , are formed after the armature block has rotated in the forward direction and after the armature block has rotated in the reverse direction, without providing a special permanent plate or the like in that portion. Since it is possible to differentiate the magnetic resistance of the magnetic circuit due to the magnetic flux of the permanent magnet, single stabilization is easily possible, reducing the number of man-hours and greatly contributing to cost reduction. Since there is no need to provide a residential plate, the magnetic properties of the magnetic path components (such as the L-shaped piece) will not deteriorate due to heat from welding or the like.

In the above embodiment, the first magnetic pole part, the second magnetic pole part, and the iron core are constructed from two L-shaped pieces, but they may be constructed by other means.
For example, as shown in FIG. 5, one side of the L-shaped piece 21 is inserted into a hole in the coil frame, and an I
One end of the L-shaped piece 22 overlaps with the L-shaped piece 2.
The other side tip 21a of the I-shaped piece 22 serves as the first magnetic pole, and the other end 22a of the I-shaped piece 22 serves as the second magnetic pole.
It may also be like the magnetic pole part of the In this way, the width of the iron core becomes thinner than that of the above embodiment, and it is possible to achieve further miniaturization. The first magnetic pole part, the second magnetic pole part, and the iron core may be integrally formed from the beginning. In this case, the first magnetic pole part and the second magnetic pole part are not on the same straight line but are shifted due to bending or tapering the opposite sides of the first magnetic pole part and the second magnetic pole part. You can do it like this.

In the electromagnet device according to this invention, the first magnetic pole part and the second magnetic pole part are not on the same straight line but are shifted, so compared to the case where they are on the same straight line to achieve single stabilization, the If the size of the electromagnet device is the same, the stroke can be made larger, and if the stroke is the same, it can be made smaller.

The electromagnet device according to this invention is not limited to the above embodiment. For example, the bearing portion of the armature block may be made of synthetic resin instead of a permanent magnet, and may be sandwiched between two permanent magnets having the same magnetization direction.

The electromagnetic device according to this invention is used, for example, to open and close contacts of a relay, but its uses are not limited to this.

[Effect of idea]

Since the electromagnet device according to this invention has the structure as described above, when the armature block rotates forward or backward, a gap can be forcibly formed between the mutually attracted parts. Therefore, single stabilization can be easily achieved without providing a special residential plate or the like in that area, which can greatly contribute to cost reduction.

[Brief explanation of drawings]

Fig. 1 is an assembled perspective view of one embodiment of this invention, with some parts omitted and the coil simply drawn, and Fig. 2 a and b show the operating state of the embodiment.
A partially omitted plan view, FIG. 3 is an exploded perspective view of the embodiment with a simplified representation of the coil, and FIG. 4 is a perspective view of two L-shaped pieces used in the embodiment. FIG. 5 is a perspective view of an L-shaped piece and an I-shaped piece used in another embodiment. 1... Electromagnetic device, 2... Electromagnetic block, 3
... Armature block, 4 ... Coil, 5a, 21
a...First magnetic pole part, 6a, 22a... Second magnetic pole part, 7... Coil frame, 7a, 7b... Convex part of coil frame, 11, 12... Two magnetic pieces, 11
a, 12a... Same side end of two magnetic pieces, 11
b, 12b... Same side end of two magnetic pieces, 13...
…permanent magnet.

Claims (1)

[Claims for Utility Model Registration] (1) A first magnetic pole portion is provided at one end in the axial direction of the coil, and a second magnetic pole portion is provided at the other end, and the excitation of the coil causes the first magnetic pole portion to An electromagnetic block in which a magnetic pole part and a second 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. and a second magnetic pole part are respectively inserted between one end part on the same side and the other end part on the same side of two magnetic material pieces, and the two blocks are combined. A convex portion in which the magnetic pole part and the second magnetic pole part are not on the same straight line but are offset, and the coil frame around which the coil is wound restricts forward or reverse rotation of the armature block. An electromagnetic device characterized by having: (2) One side of the first L-shaped piece and one side of the second L-shaped piece are inserted into the hole of the coil frame from both ends of the hole and overlap, and the tip of the other side of the first L-shaped piece and the tip of the other side of the second L-shaped piece is the first
The electromagnetic device according to claim 1, which is a magnetic pole part and a second magnetic pole part. (3) One side of the L-shaped piece is inserted into a hole in the coil frame, one end of the I-shaped piece overlaps the tip of the L-shaped piece, and the tip of the other side of the L-shaped piece and the other end of the I-shaped piece overlap. The electromagnet device according to claim 1, which is a first magnetic pole part and a second magnetic pole part.