JPH0445214Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a monostable polar electromagnet.

[Background technology]

Conventionally, this type of monostabilized electromagnet has a second
As shown in Figures a and b, there is a flat approximately U-shaped armature 12 facing the intermediate magnetic pole 10a and both side magnetic poles 10b, 10b of a flat approximately E-shaped yoke 10, which is hinged and fixed with a return spring 11. In this case, since each component is flat, it is possible to make it thinner, but since the yoke 10 that forms the magnetic path is E-shaped, the magnetic path is long and the magnetic resistance is large, so it is difficult to make it smaller. The disadvantage was that the magnetic efficiency deteriorated as the temperature increased. Therefore, there was a problem in that it had to be made larger.

[Purpose of invention]

The present invention is an attempt to improve the above-mentioned problems, and its purpose is to provide a monostable polar electromagnet that is small, thin, and has good magnetic properties.

[Disclosure of invention]

The present invention consists of a generally T-shaped flat yoke consisting of an intermediate magnetic pole and both end magnetic pole parts around which a coil is wound, a base for fixing the yoke, and a magnetic path that engages both ends of the yoke with both end magnetic pole parts. a substantially U-shaped flat plate-shaped first armature whose intermediate portion having a small cross section faces the intermediate magnetic pole portion of the yoke; and the first armature via permanent magnets provided near both sides of the intermediate magnetic pole portion. a flat plate-shaped second armature which is fixed integrally with at least the first armature;
By forming a space between both sides of the armature and the base, it is a monostable polar electromagnet that is small, thin, and has stable magnetic properties.

An embodiment of the present invention will be described below based on the drawings.

As shown in FIG. 1, the monostable polar electromagnet of the present invention consists of a yoke 1 and an armature block 6.

The yoke 1 is made of a flat magnetic material, and the overall shape is approximately T.
It has a shape and is fixed to the base 7. The yoke 1 consists of both end magnetic pole parts 1a, 1a and an intermediate magnetic pole part 1b. Both end magnetic pole parts 1a, 1a absorb leakage magnetic flux at the engaging part when engaging the first armature 2 described later, and improve magnetic efficiency. In order to increase the height, it is slightly bent and extended in parallel with the intermediate magnetic pole portion 1b. Further, a coil 4 is wound around the intermediate magnetic pole portion 1b,
The height of the electromagnet, ie, the distance that the armature block 6 (to be described later) moves, is also set within this height. Further, the coil 4 is connected to both sides 2e, 2e of the first armature 2 and the intermediate magnetic pole part 1 of the yoke 1.
Since it is disposed in the space created by b, other parts (for example, a contact block when used in a relay) can be disposed between the base 7 and both sides 2e, 2e of the first armature 2. Spaces A and A are formed.

The armature block 6 consists of a first armature 2, a second armature 3, and permanent magnets 5,5.

The first armature 2 is made of a flat magnetic material and has a substantially U-shape as a whole, and both end portions 2a, 2a are engaged with both end magnetic pole portions 1a, 1a of the yoke 1 by an arbitrary method such as hinge engagement, respectively. At the same time, a notch 2c is provided in the intermediate magnetic pole opposing portion 2d of the yoke 1 so as to reduce the cross section of the intermediate magnetic pole opposing portion 2d facing the intermediate magnetic pole portion 1b.

The permanent magnets 5, 5 have a cubic shape, have a certain gap with the intermediate magnetic pole part 1b of the yoke 1, and are disposed near both sides of the intermediate magnetic pole part 1b.

The second armature 3 is made of a flat magnetic material,
It is fixed integrally with the first armature 2 via the permanent magnets 5, 5.

The notch 2c of the first armature 2 increases the magnetic resistance of the remaining intermediate magnetic pole opposing portion 2d, and the magnetic flux generated from the permanent magnets 5 directly flows into the intermediate magnetic pole portion 1b of the yoke 1, resulting in magnetic saturation. The magnetic flux is the first
Since the magnetic flux is divided into both sides 2e and 2e of the armature 2 and the magnetic path is made up of the both sides 2e and 2e and the intermediate magnetic pole part 1b of the yoke 1, the notch 2c allows the magnetic flux to flow between the sides 2e and 2e. Any size and shape may be used as long as it flows to 2e.

Now, a current is applied to the coil 4 and the intermediate magnetic pole part 1 is
When the yoke 1 is excited so that b becomes the S pole and both poles become the N pole, the amateur block 6 operates and the yoke 1
The second armature 3, which was in contact with the intermediate magnetic pole portion 1b, is separated, and the first armature 2, which is in the separated state,
The intermediate magnetic pole opposing portion 2d contacts the intermediate magnetic pole portion 1b. When the current in the coil 4 is stopped, the armature block 6 is again moved by the magnetic force of the permanent magnets 5, 5.
returns to its original state, the first armature 2 separates from the intermediate magnetic pole portion 1b of the yoke 1, and the second armature 3 comes into contact with it. This is a so-called monostable polar electromagnet.

[Effect of idea]

As described above, in the present invention, since the first armature, the second armature, and the yoke that make up the magnetic path are each flat plate-like, when a polarized electromagnet is constructed, a magnetic path with sufficiently small magnetic resistance can be formed even if the thickness is made thin. It is possible to make it thinner. Also, since a space is formed between both sides of the first armature and the base, other components, such as a contact block when used to drive a relay, can be placed in that space. Therefore, it is possible to construct a thin and small relay without deteriorating the magnetic efficiency as in the conventional case.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional perspective view showing an embodiment of the present invention. Figures 2a and 2b show a conventional example, with Figure 2a being a side view and Figure 2b being an exploded perspective view. 1... Yoke, 1a, 1a... Both end magnetic pole parts, 1
b...Intermediate magnetic pole part, 2...First armature, 2
a, 2a... Both ends, 2b... Middle part, 2c...
Notch, 2d...Intermediate magnetic pole opposing portion, 2e, 2e...
...Both sides, 3...Second armature, 4...Coil, 5, 5...Permanent magnet, 7...Base.

Claims (1)

[Scope of utility model registration request] A substantially T-shaped flat yoke consisting of an intermediate magnetic pole and both end magnetic pole parts around which a coil is wound, a base that fixes the yoke, and a part with a small magnetic path cross section that engages both ends of the yoke with both end magnetic pole parts. a substantially U-shaped flat plate-shaped first armature having an intermediate portion facing the intermediate magnetic pole portion of the yoke; and a first armature integrally fixed to the first armature via permanent magnets provided near both sides of the intermediate magnetic pole portion. 1. A monostable polar electromagnet comprising: a second armature in the form of a flat plate; and a space is formed between at least both sides of the first armature and the base.