JPH0347297Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to a polarized electromagnet device.

[Background technology]

Conventionally, 4T and 4C relays have long electromagnetic devices having two coils arranged in the same axial direction. However, since the permanent magnets were arranged above and below the sides of the electromagnet coils, the overall height of the electromagnet device increased, making it difficult to achieve a thin structure when configured as a relay.

[Purpose of invention]

In view of the above, the object of this invention is to provide a thin and long electromagnetic device.

[Disclosure of invention]

In order to achieve the above purpose, this invention
Two coils are wound around the center side of a letter-shaped magnetic piece, and there is an electromagnetic block in which the part between the two coils is a magnetic pole part, and the two magnetic pieces hold a permanent magnet. The armature block is sandwiched from both ends in the magnetization direction, and the armature block has two pieces of magnetic material that straddle the magnetic pole part between the two coils, and can be rotated in the forward or reverse direction depending on the change in the excitation state of the coil. The gist is an electromagnetic device that is designed to move.

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

FIG. 1 shows one embodiment of this invention. As shown in FIG. 1, this electromagnet device includes an electromagnet block 1 and an armature block 2.

In the electromagnet block 1, two coils 5 and 6 are wound around the center side 4 of an S-shaped magnetic piece 3, and the center side 4 serves as an iron core. The part 4a in between is a magnetic pole part (hereinafter referred to as "iron core magnetic pole part"). The two coils 5 and 6 are wound around coil frames 7 and 8, respectively.

The armature block 2 is made up of two magnetic pieces 11 and 12 (which serve as "movable yokes") sandwiching a permanent magnet 13 from both ends in the direction of magnetization. Between the two coils 5 and 6, the armature block 2
The two magnetic pieces 11 and 12 straddle the core magnetic pole part 4a and are designed to move forward and backward (in the directions of arrows A and B).

In this embodiment, both ends 3 of the S-shaped magnetic piece 3
a and 3b are equally exposed between the two coils 5 and 6, and form a magnetic pole part (hereinafter referred to as "yoke magnetic pole part")
It is a latching type electromagnetic device. With this arrangement, magnetic efficiency is better and magnetic flux leakage is reduced compared to a case where both ends of the S-shaped magnetic piece do not face between the two coils and are of a latching type. The forward and reverse movement of the armature block is also performed forcefully.

The operating state of this latching type electromagnet device having such a configuration will be explained. Armature block 2
is in the state shown by the solid line in FIG.
When polarized, the armature block 2 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 1
1 comes into contact with the core magnetic pole part 4a, and the magnetic piece 12 comes into contact with one of the yoke magnetic pole parts 3b, respectively, so that the state shown by the dashed line in FIG. 1 is achieved. This state is maintained even if the excitation of the coils 5 and 6 is stopped. Armature block 2
In this state, the core magnetic pole portion 4a is turned to N by excitation of the coil 5 and/or the coil 6.
When the yoke magnetic pole parts 3a and 3b are made S poles,
The armature block 2 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 11 is attached to one of the yoke magnetic pole parts 3a, and the magnetic piece 12 is attached to the iron core magnetic pole part 4.
a, respectively, and the state shown by the solid line in FIG. 1 is reached. This state is maintained even if the excitation of the coils 5 and 6 is stopped.

In the electromagnet device according to this invention, when the armature block 2 moves forward and backward in parallel in the directions of arrows a and b,
When the armature block 2 is sandwiched and guided between the two coil frames 7 and 8, the movement of the armature block 2 becomes stable. If a material with a small friction coefficient is used for the sliding parts of both blocks 1 and 2, the movement will be smoother.

Regardless of whether they are connected in series or in parallel, if two coils are to be energized at the same time, it is recommended that the current be passed through one coil clockwise around the iron core and the other coil counterclockwise around the iron core. . That is, it is preferable that the excitation of the two coils be in opposite directions. When energizing one coil at a time, if one coil is energized clockwise about the core, the other coil is energized clockwise about the core, and if one coil is energized counterclockwise about the core, the other coil is energized clockwise about the core. By passing current through the coils in a counterclockwise direction around the iron core, the latching operation can be performed simply by switching the coils through which the current is passed without changing the polarity of the current.

The electromagnetic device according to this invention has the above-mentioned function, depending on whether the magnetic resistance of the magnetic circuit formed by the permanent magnet is the same or different when the armature block moves in the forward and reverse directions. A latching type or a single stable type can be obtained. To give an example of a single stable type, in the one shown in Figure 1, one of the two yoke magnetic pole parts, for example, the part C shown by the dashed line, is cut out so that the yoke magnetic pole part is between the two coils. The surface facing the magnetic material piece of either one of the two yoke magnetic pole parts, or the opposing face of the iron core magnetic pole part or the yoke magnetic pole part of one of the same side ends of the two magnetic material pieces. Providing a notch on either the opposing surface or the opposing surface with the two magnetic pieces of the iron core magnetic pole part,
Examples include providing holes, protrusions, recesses, and non-magnetic pieces.
In the single stable type electromagnet device according to this invention, when the electromagnetic circuit becomes de-energized, the magnetic circuit returns to a state where the magnetic resistance is small without using an external force. Furthermore, even if a current with a polarity opposite to that which causes the excitation state is passed through the coil, the coil will not operate.

In addition, in the case shown in FIG. 1, when the part C shown by the dashed-dotted line is made into a single stable type, the yoke magnetic pole Since it is not in contact with the portion 3b, the magnetic resistance is large. That is, this is the excited state. When the coil is no longer energized, the armature block 2 moves in the direction of arrow A, resulting in the state shown by the solid line. In this state, the magnetic resistance is small, so this state (non-excited state) is maintained as long as the coil is not energized.

In the electromagnet device according to this invention, when the armature block moves in the forward and reverse directions, the portion where the armature block and the electromagnet block attract each other forms a residential gap (a non-magnetic piece and/or an air gap). It is also possible to do so via
For example, the coil frames 7 and 8 are two coils 5 and 6.
If the core magnetic pole part 4a is thinly covered, that part becomes a permanent plate (non-magnetic material piece), and the number of parts can be reduced without increasing the number of parts.
It can easily be made into an electromagnetic device with a residential gap. Moreover, in this case, since heating is not performed, the magnetic properties of the magnetic material do not deteriorate. Electromagnetic devices with a residential gap prevent attraction due to residual magnetism that remains even when the coil current (voltage) is reduced to 0, and the coil current (voltage)
If the value is below a certain level, the suction will be released, etc.
Suction repulsion and return are performed more smoothly, and suction characteristics are improved.

Note that the electromagnet device according to this invention is not limited to the above embodiment. The two magnetic pieces, the S-shaped magnetic piece and the armature block, may be made of the same material or may be made of different materials. The S-shaped magnetic material piece also includes an inverted S-shaped piece.

In the electromagnet device according to this invention, the armature block is placed between the two coils of the electromagnet block, so that the electromagnet is thin (thin in the direction perpendicular to the paper as shown in Figure 1) and long. It can be a device. The thickness can be reduced to the thickness of the coil portion including the armature block. If the part other than the center side of the S-shaped magnetic piece (this part is a fixed yoke) is wrapped around the coil, the width of the electromagnet device (in the vertical direction as shown in Figure 1) length) can be made smaller. Therefore, if the electromagnet device of this invention is applied to, for example, a relay, it becomes easy to make the relay smaller and thinner. Furthermore, as described above, leakage magnetic flux can be reduced, resulting in high efficiency and mutual interference with nearby magnetic components (relays, etc.) can be eliminated. The S-shaped magnetic material piece can be easily made and has good dimensional accuracy if it is made by punching from a plate, punching and bending, or the like.

[Effect of idea]

As seen above, in the electromagnet device according to this invention, since the armature block is arranged between the two coils of the electromagnet block, it can be easily made into a thin and long electromagnet device. When the electromagnet device according to this invention is used in a relay, for example, it is easy to make the relay smaller and thinner.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment with the coil and coil frame in section. 1... Electromagnet block, 2... Armature block, 3... S-shaped magnetic piece, 4... Center side of S-shaped magnetic piece, 5, 6... Two coils, 11, 1
2...Two pieces of magnetic material, 13...Permanent magnet.

Claims (1)

[Claims for Utility Model Registration] (1) An electromagnetic block in which two coils are wound around the center side of an S-shaped magnetic piece, and the part between the two coils on the center side is a magnetic pole part. and an armature block formed by two pieces of magnetic material sandwiching a permanent magnet from both ends in the direction of magnetization,
The armature block is an electromagnetic device in which two pieces of magnetic material straddle the magnetic pole part between two coils, and are configured to move forward and backward as the excitation state of the coil changes. (2) Utility model registration claim No. 1, in which both ends of the S-shaped magnetic material piece face equally between two coils and serve as magnetic poles, forming a latching type.
Electromagnetic device as described in section. (3) The electromagnet device according to claim 1 of the utility model registration claim, wherein both ends of the S-shaped magnetic piece face unevenly between two coils to form a magnetic pole part, and are of a single stable type. . (4) Utility model registration claims 1 to 3, in which the armature block is guided by being sandwiched between two coil frames around which two coils are respectively wound to move forward and backward. The electromagnetic device according to any of paragraphs.