JPH0225205Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an electromagnet device used in a relay or the like.

[Background technology]

In recent years, there has been a demand for thinner relays, and along with this, electromagnetic devices used in relays are also required to be thinner.

[Purpose of invention]

This invention is a response to such demands, and aims to provide a thin electromagnetic device.

[Disclosure of invention]

In order to achieve the above object, this invention includes an iron core around which a coil is wound, a permanent magnet, and a U-shaped armature, and the base of the iron core and one side of the permanent magnet in the magnetization direction are connected to each other. are magnetically connected by the first magnetic piece, and the second magnetic piece is arranged in the magnetizing direction of the permanent magnet so that the tip faces the first magnetic piece with the tip of the iron core in between. The armature is magnetically connected to the other side, and both ends of the armature are sandwiched between the iron core and the first magnetic piece and between the iron core and the second magnetic piece, and
Its gist is an electromagnetic device that is movable between two pieces of magnetic material. Hereinafter, this invention will be explained in detail based on drawings showing embodiments.

FIG. 1 shows an electromagnet device according to this invention. As shown in the figure, this electromagnet device includes an iron core 2 around which a coil 1 is wound, a permanent magnet 3, and a U-shaped armature 4. The iron core 2 is an L-shaped first magnetic piece (yoke).
The permanent magnet 3 is fixed to the tip of the short side 5a of the magnet 5 so as to be parallel to the long side 5b, and the S pole side of the permanent magnet 3 in the magnetization direction is in contact with the inner side of the tip of the long side 5b. are magnetically connected by a magnetic piece 5. The base of the second magnetic piece 6 is in contact with the N-pole side of the permanent magnet 3, and its tip 6a faces the magnetic piece 5 across the core tip 2a. The armature 4 has an intermediate portion 4a sandwiched between the core tip portion 2a and the permanent magnet 3, and
Both ends 4b and 4c are the core tip 2a and the magnetic piece 5
During this time, they are sandwiched between the core tip 2a and the magnetic piece 6, and are movable between the magnetic pieces 5 and 6 (in the direction of arrow A). When the outer surface of the end 4c comes into contact with the inner surface of the magnetic piece 6, as shown by the solid line, the inner surface of the end 4b comes into contact with the iron core 2, as shown by the dashed line. When the outer surface of the end portion 4b contacts the inner surface of the magnetic piece 5, the inner surface of the end portion 4c contacts the iron core 2.

This electromagnetic device operates as follows. When no current flows through the coil 1 (de-energized), the movable armature 4 is in the most stable state, that is, as shown by the solid line, the end 4b of the armature 4 is connected to the iron core 2.
The end portions 4c are in contact with the magnetic pieces 6, and a magnetic circuit with low magnetic resistance is maintained by the permanent magnet 3, the magnetic piece 6, the movable armature 4, the iron core 2, and the magnetic piece 5. It can be done. In this state,
When a current is applied to the coil 1 to excite it so that the tip 2a of the iron core 2 becomes the north pole, the end 4c of the armature 4 becomes the north pole due to magnetic induction. On the other hand, due to the magnetic induction by the permanent magnet 3, the tip 6a of the magnetic piece 6 becomes the north pole, so the end 4c and the tip 6a repel each other, and the armature 4 is shown by a dashed line. The iron core 2, the magnetic piece 5, and the armature 4 are kept in a state in which a magnetic circuit is formed by the iron core 2, the magnetic piece 5, and the armature 4. When the current flowing through the coil 1 is stopped, the armature 4 returns to the position indicated by the solid line. A relay is a device that utilizes the operation of such an armature to open and close a contact mechanism.

This electromagnetic device consists of a permanent magnet, a first and a second
The magnetic piece, the iron core, and the armature are all arranged on the same plane, and the armature also moves within the same plane, so it can be made very thin as a whole. The armature has a simple U-shape, so manufacturing costs are low. In addition, it is easy to make the armature ultra-small, and since the armature becomes very light, the change in the operating state (moving ← → open) of the armature due to the mounting direction of the electromagnetic device becomes very small.

In addition, in the above embodiment, the polarity of the permanent magnet may be reversed. In this case, when moving the armature, current is passed through the coil so that the tip of the iron core becomes the south pole. Further, as in the embodiment, the permanent magnet, the first and second magnetic pieces, the iron core, and the armature are not necessarily arranged on the same plane, but may be slightly offset. Furthermore, the direction of movement of the armature does not have to be exactly on the same plane as the plane containing the above-mentioned components, but may be slightly offset.

[Effect of idea]

The electromagnetic device according to this invention includes an iron core around which a coil is wound, a permanent magnet, and a U-shaped armature, and the base of the iron core and one side surface of the permanent magnet in the magnetization direction have a first magnetism. In addition to being magnetically connected by the body piece, a second magnetic piece is magnetically connected to the other side in the magnetization direction of the permanent magnet so that the tip part faces the first magnetic piece with the tip part of the iron core in between. connected, and the armature has both ends connected to the iron core and the first
Since it is sandwiched between the magnetic material pieces and between the iron core and the second magnetic material piece, and is movable between the two magnetic material pieces, it can be made thin.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the electromagnet device according to this invention. 1...Coil, 2...Iron core, 3...Permanent magnet,
4... Armature, 5... First magnetic piece, 6... Second magnetic piece.

Claims (1)

[Scope of utility model registration request] Each includes an iron core around which a coil is wound, a permanent magnet, and a "U"-shaped armature, and the base of the iron core and one side surface of the permanent magnet in the magnetization direction are magnetically connected by a first magnetic piece. At the same time, a second magnetic piece is magnetically connected to the other side of the permanent magnet in the magnetization direction so that its tip faces the first magnetic piece across the tip of the iron core, and the armature Both ends are sandwiched between the iron core and the first magnetic piece and between the iron core and the second magnetic piece, and
An electromagnetic device that is movable between two pieces of magnetic material.