JPS5893305A - Electromagnet device - Google Patents

Abstract

PURPOSE:To form a magnetic circuit while largely reducing the number of required parts and improve the magnetic property, by employing as an iron core an amorphous magnetic metal piece showing a soft magnetic property. CONSTITUTION:A plurality of amorphous magnetic metal pieces 10 showing a soft magnetic property are laminated and elastically bent at a substantially central part thereof to form forked side piece parts 13, 14. The end surfaces of the respective side piece parts 13, 14 are made to face each other with a predetermined gap maintained therebetween. One side piece part 13 is wound with an excitation coil 3. when the coil 3 is energized, a magnetic circuit is formed at an iron core 1. The side piece part 14 slightly swings owing to the elasticity of the bent part 15, and a magnetic pole surface 12 is attracted to a magnetic pole surface 11. When the energization is stopped, the bending stress stored in the bent part 15 causes the side piece part 14 to return.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnet device incorporated into an electromagnetic relay or the like.

Conventionally, this type of electromagnet device has used soft iron as the iron core, and in order to construct a magnetic circuit with such an electromagnet device, in addition to the iron core, a yoke and a movable iron piece are required, and furthermore, a movable iron piece A return spring was also required. As a result, the number of parts increases, production management and assembly work are complicated, and magnetic leakage occurs at the joints of each part.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to create a magnetic circuit that uses an amorphous magnetic metal piece exhibiting soft magnetic properties as an iron core, and which greatly reduces the number of components. An object of the present invention is to provide an electromagnet device that can form a magnetic field and has good magnetic properties.

In other words, amorphous magnetic metals that exhibit soft magnetic properties are usually called amorphous alloys, and they exhibit high magnetic properties that conventional materials do not have, and in recent years, they have become relatively easy to produce using the roll method using ultra-quenching. Ta. The amorphous magnetic metal pieces obtained by this method are about 10 to 508 m thick and 8 QMIR wide, but if these are laminated and used as an iron core, they can be driven with a small current due to high magnetic flux density, and have a low coercive force. It has advantages such as omitting the magnetic shield plate due to high corrosion resistance and omitting plating treatment due to high corrosion resistance.
Since it is 0kq/sr2, its springiness can be utilized.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are exemplary embodiments.

FIG. 1 shows an electromagnetic device according to the present invention, in which 1 is an iron core, 2
is a spool, and 3 is an excitation coil.

As shown in FIGS. 2 and 3, the iron core 1 has a thickness of 30 mm.
An amorphous magnetic metal piece with a μm1 width of 51n and a length of 80fl (components include, for example, 78% Fe and 12% B).

It is manufactured by laminating 75 sheets of 5i10ch) 1.0, tightening them at 10++ng intervals using tool 4, bending them at the center to form a U-shape, and then bending both ends by 6m each for 90'.

In this case, when the metal piece 10 is bent into a U-shape, misalignment occurs on the end face even though the thickness of the metal piece 10 is 30 μm. Therefore, the end face is polished flat by electrolytic polishing. 1
It was set as 2. The gap between the magnetic pole faces 11° and 12 is 0.5.
It is about n.

The spool 2 is made of a resin material and has a symmetrical shape, and is attached to the side pieces 1-3 of the iron core 1 so as to be tightly held therein,
A coil 3 is wound around the outer periphery.

In the above configuration, when the excitation coil 3 is energized, a magnetic circuit is formed in the iron core 1, the side piece 14 swings slightly due to the elasticity of the U-shaped bent portion 15, and the magnetic pole face 12 is attracted to the magnetic pole face 11. Ru. When the current supply is cut off, the bending stress accumulated in the U-shaped bent portion 15 causes the side piece portion 14 to return to its original position.

Therefore, by connecting a card or the like to the side piece 14, an electromagnetic relay can be constructed that drives the contacts via the card.

Note that the electromagnet device according to the present invention is not limited to the above-mentioned embodiments, and can be variously modified within the scope of the gist thereof. For example, instead of bending both ends by 90 degrees in order to make the magnetic pole faces face each other, only one end may be bent by 90 degrees. In this case, a processing method may be adopted in which metal pieces 1o are stacked with only one end bent one by one, and then the central part is bent into a U-shape. Further, the metal piece 10 is not simply punched out using a press, but can be formed into any shape other than press processing by using chemical etching, and since there is no generation of flakes, the space factor of the laminated structure is improved.

As is clear from the above description, according to the present invention, since the iron core is constructed by laminating amorphous magnetic metal pieces with excellent magnetic properties, this type of metal has high magnetic flux density, low coercive force, high corrosion resistance, etc. A high-performance electromagnetic device can be created by making full use of the good properties of the metal pieces, and since the magnetic circuit is formed only from a laminate of the metal pieces, it is possible to make use of the yoke, movable iron pieces, etc. that were previously required. Since the return spring can be omitted, the structure and assembly work can be extremely simplified.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of an electromagnet device according to the present invention, and FIGS. 2 and 3 are explanatory diagrams of the manufacturing process of an iron core. DESCRIPTION OF SYMBOLS 1... Iron core, 2... Spool, 8... Excitation coil, 10... Amorphous magnetic metal piece, 11.12... Magnetic pole surface, 13... Side piece part. Patent Applicant Tateishi Electric Co., Ltd. Agent Patent Attorney Aoyama Hao #1 or 2 Figure 1 Figure 2 Singer 0 Figure 3

Claims (1)

[Claims] (1) A plurality of amorphous magnetic metal pieces exhibiting soft magnetic properties are laminated and bent approximately at the center so as to exhibit elasticity in the bending direction to form a bifurcated side piece, and the end face of this side piece. An electromagnet device characterized in that the magnets are opposed to each other with a certain gap maintained, and an excitation coil is wound around one side piece.