JPS5810327Y2 - Thin polarized electromagnet device - Google Patents

Description

[Detailed description of the invention] The present invention is based on the U-shaped yoke 2, which is formed by punching out a magnetic plate material in a U-shape, and the coil 1 can be wound around the inner plate portion 2C. A plate-shaped movable iron core 3 is placed between both legs 2a and 2b.
is placed horizontally, one end of the movable iron core 3 is joined to the upper surface of one leg 2a, and the other end is a free end, and the lower surface of the yoke piece 4, which is disposed oppositely above the other leg 2b of the U-shaped yoke 2, is connected to the lower surface of the yoke piece 4. A thin polarized electromagnet device comprising a permanent magnet 5 interposed in contact with the upper surface of the leg portion 2b, and the upper and lower surfaces of the free end of the movable iron core 3 facing the lower surface of the yoke piece 4 and the upper surface of the leg portion 2b, respectively. The object of this invention is to provide a thin polarized electromagnet device which has a simple structure, improves the attractive force, and can have a flat structure.

The present inventor has conventionally inserted a rotatable movable iron core into a coil frame, and the free end side of this movable iron core is A polarized electromagnet device has been developed that is interposed between yoke pieces that are each excited by a pair of magnetic poles of a permanent magnet. Therefore, the inner diameter of the core insertion hole in the coil frame in which the coil is wound must have at least enough room to allow the movable core to freely rotate. There were problems in that it was difficult to realize a flat structure due to the large diameter, and it was necessary to separately provide means for fixing the coil frame.

The present invention has been made to solve these problems of the conventional example.

The present invention will be explained in detail below with reference to embodiment figures.

Reference numeral 1 denotes an excitation coil, which is wound around the back plate portion 2C of the U-shaped yoke 2.

One end of the movable core 3 is joined to the upper surface of one leg 2a of the U-shaped yoke 2, and the movable core 3 and the U-shaped yoke 2 are connected to each other at the one end.
The free end of the movable iron core 3 is configured to be able to move up and down in opposition to the other leg portion 2b.

A permanent magnet 5 is disposed on the upper surface of the other leg 2b of the U-shaped yoke so as to abut one magnetic pole surface, and a yoke piece 4 is fixed on the other magnetic pole surface of the permanent magnet 5. The lower surface of the yoke piece 4 and the upper surface of the U-shaped yoke 2 are opposed to each other in substantially parallel.

Thus, the lower surface of the yoke piece 4 and the upper surface of the U-shaped yoke 2 are interposed between them, with the upper and lower surfaces of the free end of the movable core 3 facing each other, and by changing the excitation polarity of the coil 1, , a reversal operation is performed in which the free end of the movable iron core 2 is attracted to the yoke piece 4 side or the leg portion 2b side.

In addition, by forming the U-shaped yoke 2 or the movable iron core 3 from a so-called semi-hard magnetic material that has intermediate characteristics between a permanent magnet (hard) and an electromagnetic soft iron (soft) and has residual magnetism, It is possible to obtain magnetically held type operation.

As mentioned above, the present invention consists of punching out a magnetic plate material in a U-shape to form a U-shaped yoke, and creating a movable plate between the legs of the U-shaped yoke that allows the coil to be wound around the inner part of the U-shaped yoke. Since the iron core is placed horizontally and one end of the movable iron core is joined to the upper surface of one of the legs while the other end is left as a free end, the movable iron core can be freely moved up and down in the vertical direction when winding the coil. There is no need to provide room for rotation, and the coil can be wound directly on the back plate of the U-shaped yoke, making it possible to reduce the outer diameter of the coil. This has the advantage that it can be made smaller and thinner than the conventional example, and there is also the advantage that there is no need to separately provide means for fixing the coil frame as in the conventional example.

Furthermore, in the present invention, each part such as the U-shaped yoke and the movable iron core can be formed only by punching out magnetic plate material, reducing the cost required for parts processing, making it possible to reduce the cost and improve the structure. It has the advantage of being simple and easy to assemble, and can easily be made smaller and thinner. Also, since the coil is wound on the back plate of the U-shaped yoke, the coil winding work is extremely easy. It has the following advantages.

In addition, a permanent magnet is interposed in contact between the lower surface of the yoke piece disposed oppositely above the other leg of the U-shaped yoke and the upper surface of the leg, and the free end of the movable iron core is placed between the lower surface of the yoke piece and the upper surface of the leg. Since the upper and lower surfaces face each other, the free end of the movable core can be reversed vertically by reversing the excitation polarity of the coil, and at this time, in addition to the magnetic force generated by the excitation of the coil, the permanent magnet Since the repulsion and attraction forces can also be used, it has the advantage of greatly increasing the overall attraction force as an electromagnet device, and is not limited to monostable operation types that operate when the coil is excited. By forming the movable core or the U-shaped yoke from a semi-hard magnetic material, there is an advantage that magnetically holding type operating characteristics can be obtained very easily.

[Brief explanation of drawings]

The drawing shows a schematic perspective view of an embodiment of the present invention, in which 1 is a coil;
2 is a U-shaped yoke, 2 a and 2 b are legs, 2 C
3 is a movable iron core, 4 is a yoke piece, and 5 is a permanent magnet.

Claims (1)

[Scope of utility model registration request] A U-shaped yoke is formed by punching out a magnetic plate material into a U-shape, and a movable iron core is installed horizontally between the legs of the U-shaped yoke, around which a coil can be wound. One end is joined to the upper surface of one leg, the other end is a free end, and a permanent magnet is brought into contact between the lower surface of the yoke piece, which is placed oppositely above the other leg of the U-shaped yoke, and the upper surface of the leg. A thin polarized electromagnet device in which the upper and lower surfaces of the free end of a movable iron core are respectively opposed to the lower surface of the yoke piece and the upper surface of the leg.