JPS63237506A - Electromagnet device - Google Patents

Abstract

PURPOSE:To improve a magnetic effect by forming an armature into a nearly U-shaped form and by making a place of its bending part a base end part and also an one side facing piece of its armature a pointed end which is contact-releasable to a piece of a yoke; besides, by making the other side facing piece hold a position so that the other side facing piece may receive sucking force in the same direction as that of sucking force which is received by the above one side facing piece. CONSTITUTION:An armature 5 is formed into a nearly U-shaped form and a place of its bending part is formed to be a base end part 5c which acts as a supporting point of angular displacement, while an one side facing piece 5a is formed to be a pointed end which is contact- releasable to a piece 4a of a yoke having the U-shaped form; besides, this device permits the other side facing piece 5b to hold a position to facing the other piece 4b of the yoke so that the other side facing piece 5b may receive sucking force in the same direction as that of sucking force which is received by the one side facing piece. In this way, the yoke 4 is so free from seam joints that as a matter of course magnetic reluctance can be reduced and further, sucking force generating the displacement of the armature 5 develops at both sides of the supporting point of angular displacement, that is, at two areas, one of which is the one side facing piece 5a as well as the other side facing piece 5b of the armature and the other of which is the piece 4a as well as the other piece 4b of the yoke. Then a magnetic effect can be improved still more.

Description

[Detailed Description of the Invention] [Technical Field] The present invention is an electromagnetic device that angularly displaces an armature by energizing or demagnetizing a coil, and is particularly suitable for an electromagnetic relay by providing a movable contact on the armature. The present invention relates to an electromagnetic device used.

[Background technology] In electromagnet devices, especially those used in electromagnetic relays,
In order to reduce the adjustment process for spring members such as movable contacts and to ensure sufficient contact pressure, an increase in the armature attraction force is required. Furthermore, it is necessary to prevent the electromagnet device from increasing in size, and it is necessary to improve the magnetic efficiency of the electromagnet device.

Therefore, the applicant of the present invention proposed an electromagnet device as shown in FIG. 3 in Japanese Patent Application No. 61-306785.

That is, the coil B has an air core part A, and the opposing piece has a U-shape consisting of a short piece C and a long piece, and the short piece C is attached to the inner wall forming the air core part A of the coil, and the long piece is the coil B. a yoke E located on the outside of the yoke, and an air core portion A whose base end is supported by the long piece of the yoke so as to be able to be angularly displaced and whose tip end is a coil.
It consists of an armature F that is disposed in such a manner that it can come into contact with and separate from the short piece C of the yoke, and a return spring G that biases the armature F in a direction that moves the armature F away from the short piece C of the yoke. The point where E and armature F engage and separate (attract and release) is located in the air core A of coil B, improving magnetic efficiency, and since there is no seam between the yoke and magnetic resistance, magnetic resistance can be reduced. Furthermore, magnetic efficiency was improved.

However, most of the attractive force that displaces the armature F is generated only between the tip of the armature furthest from the angular displacement fulcrum and the short piece C of the yoke. There are limits to the demands we want to make.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to connect and separate the yoke and the armature (suction release).
An object of the present invention is to provide an electromagnet device in which an operating part is located within the air core of a coil, and the magnetic efficiency can be further improved.

[Disclosure of the Invention] The electromagnet device of the present invention has an armature formed in a substantially U-shape, with one of the bent portions serving as a base end portion serving as an angular displacement fulcrum, and -
The opposing piece of yoke is made to be the tip that approaches and separates from one piece of the U-shaped yoke, and the opposing piece of the other side is of the yoke so that when the negative side porcelain piece receives suction force, it receives a suction force in the same direction. It is characterized by being positioned opposite to the other piece.

According to the present invention, the attractive force that displaces the armature is generated at two locations on both sides of the angular displacement fulcrum, that is, at one side of the armature facing the piece and one piece of the yoke, and at the other side of the armature facing piece and the other piece of the yoke. As a result, magnetic efficiency can be further improved.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

A coil 1 has an air core 2 and is wound around a coil frame 3. The air core part 2 in this embodiment is formed by the inner wall of the body of the coil frame 3 having a rectangular cross section around which the coil 1 is wound, but the coil frame 3 is omitted and it is formed by the inner wall of the coil 1. It's okay.

Reference numeral 4 denotes a U-shaped yoke consisting of one short piece 4a and the other long piece 4b, which is made of magnetic plate material.
is located outside the coil 1. That is, the - piece 4a is disposed on one side of the air core 2, and the tip of the other piece 4b is placed on the outside of the coil 1 on the other side of the air core 2. A further important point is that the negative piece 4a is attached to the inner wall on the opposite side from the other piece 4b.

Reference numeral 5 denotes an armature made of a magnetic plate material. Basically, the base end is supported by the other piece 4b of the yoke 4 in a state where it can be angularly displaced, and the tip part is movable towards and away from the piece 4a of the yoke in the air core part 2 of the coil. placed in a suitable condition. The armature 5 according to the present invention is formed in a substantially U-shape in which the negative side facing piece 5a and the other side facing piece 5b are approximately the same length, and one bent portion 5C is the base end, and the negative side facing piece 5b is formed in a substantially U-shape. The ceramic piece 5a is used as the above-mentioned tip that approaches and separates from the piece 4a of the yoke. The other side facing piece 5b is positioned opposite to the other piece 4b of the yoke so that when the minus side ceramic piece 5a receives an attractive force from the piece of coke 4a, it receives an attractive force in the same direction.

Reference numeral 6 designates a plate-shaped return spring that biases the armature facing piece 5a on one side away from the yoke piece 4a, and its base end is fixed to the other piece 4b of the yoke 4. In addition, when the spring force of the return spring 6 is sufficiently smaller than that of the movable contact in the case where it is applied to an electromagnetic relay, the armature is biased by the spring in the direction of bringing the ceramic piece 5a on the negative side into contact with the piece 4a of the yoke. 5 support may be the main function.

FIG. 2 schematically shows an example in which the above-mentioned electromagnet device is applied to an electromagnetic relay. Contact terminal 1 from case ti
2.12 and coil terminal 13.13 are installed, case l
A fixed contact 15 provided with a fixed contact 14 and a movable contact 17 provided with a movable contact 16 are accommodated in the electromagnetic device 1 together with the electromagnet device. This electromagnetic relay has a normally open contact configuration (open state when the coil 1 is in a demagnetized state). A card 18 connects the tip 5b of the armature 5 and the tip of the movable contact 17 of the electromagnet device.

(Operation) The solid line in Figs. 1 and 2 indicates the energized state of coil 1 (contact closed state), the broken line in Figs. 1 and 2 indicates the demagnetized state of coil 1 (contact open state), and Fig. 2 1 shows the flow state of magnetic flux when the coil 1 is in an excited state.

When the coil 1 is demagnetized, the spring force of the movable contactor 17 and the return spring 6 causes the armature 5 to be at the separated position (4) indicated by the broken line in both figures, and therefore the contact is in an open state.

When the coil 1 is energized in this state, the magnetic flux φ is one piece 4a of the yoke → air gap - one side opposing piece 5a of the armature - the other side opposing piece 5b of the armature → air gap - the other piece 4b of the yoke → the yoke Since the flow flows with one piece 4a, one side facing piece 5a of the armature 5 is attracted to one side 4a of the yoke, and the other side facing piece 5b is attracted to the other piece 4b, against the spring force of the movable contact 17 and the return spring 6. , the armature 5 is displaced to the contact position shown by the solid line in both figures, and the contact is therefore in a closed state.

When the coil 1 is demagnetized again in this state, the movable contact 1
7 and the spring force of the return spring 6, the armature 5 is separated from the short piece 4a of the yoke, and the armature 5 returns to the separated position indicated by the broken line in both figures, so that the contact is in an open state.

As is clear from this operation, since the opposing piece 5a on one side of the armature and the piece 4a of the yoke, which perform the attracting/separating (attracting/releasing) operation, are located within the air core portion 2 of the coil, magnetic flux leakage is reduced, and the armature The attractive force that displaces the armature 5 is generated at two places on both sides of the angular displacement fulcrum, that is, one facing piece of the armature and one piece of the yoke, and the other facing piece of the armature and the other piece of the yoke. It is possible to increase the attractive force for displacement, that is, to improve magnetic efficiency.

[Effects of the Invention] The electromagnetic device of the present invention has an armature formed in a substantially U-shape, with one of its bent portions serving as a base end portion serving as an angular displacement fulcrum, and -
For example, the opposing piece is a tip portion that approaches and separates from one piece of the U-shaped yoke, and the other opposing piece is such that when the opposing piece receives suction force, the other piece of the yoke receives suction force in the same direction. Since the yoke is positioned opposite to the
The attractive force that displaces the armature is generated on both sides of the angular displacement fulcrum, that is, on one side of the armature facing the other side and one side of the yoke, and on the other side of the armature and the other side of the yoke. This makes it possible to improve magnetic efficiency.

[Brief explanation of drawings]

Figures 1 (a), (b), and (c) show an embodiment of the present invention; (a) is a sectional view, (b) is a plan view, (c) is a side view, and Figure 2 is a side view. , Schematic diagram of what is commonly used in electromagnetic relays 1 and 3
The figure is a sectional view of a conventional example. 1--coil, 2--air core, 4--yoke, 4. a
-One piece, 4b--Other piece, 5-Archive, 5a--
-One side opposing piece (tip part), 5b-...Other side opposing piece, 5c
m.One location of the bent part (base end), 6-.-Return spring.

Claims (1)

[Claims] (1) A coil having an air core, a U-shaped yoke in which one opposing piece is attached to an inner wall forming the air core of the coil and the other opposing piece is located outside the coil, and a proximal end. an armature supported by the other piece of the yoke so as to be angularly displaceable, and a tip end of which is disposed so as to be able to come into contact with and separate from one piece of the yoke in the air center of the coil; In an electromagnetic device comprising a return spring that is biased by a spring in a direction away from one piece, the armature is formed into a substantially U-shape, and one of the bent portions is a base end;
One side facing piece is a tip that approaches and separates from one piece of the yoke, and the other side facing piece faces the other piece of the yoke so that when the one side facing piece receives a suction force, it receives a suction force in the same direction. An electromagnetic device that is positioned by