JPS6177309A - Electromagnet apparatus - Google Patents

Abstract

PURPOSE:To make an electromagnet apparatus thin and miniature and to make an external movable space of the apparatus unnecessary, by providing with an iron core inside a Y shaped yoke and housing an armature block in the U shaped yoke so that the armature block can be moved in the U shaped yoke in forward and reverse directions. CONSTITUTION:An electromagnet block 1 has an iron core 3 inside a U shaped yoke 2. The both ends of the U shaped yoke 2 serve as opposing magnetic pole 2a, 2b and the tip of the iron core 3 serves as a central magnetic pole 3a. The electromagnet apparatus comprises of an electromagnet block 1 and an armature block 4. The square armature block 4 has two same-oriented permanent magnets 6, 6 with the magnetizing sides put between both ends of two magnetic mambers 5a, 5b respectively. In the armature block 4, the central magnetic pole 3a positioned at the tip of the iron core 3 is inserted. The armature block 4 is housed in the yoke 2 with the both upper faces aligned so that the armature block 4 can be positioned symmetrically to the central magnetic pole 3a. Current flowing in the coil 7 causes the same polarity poles to repel and the different polarity poles to attract, and thus can move the armature block 4 in the yoke 2 in the direction of the arrow A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electromagnet device used for opening and closing contacts of a polarized relay.

[Background technology]

Conventionally, electromagnetic devices used in polarized relays and the like are of the balanced armature type, in which an electromagnetic block and an armature block are stacked vertically, and only a portion of both blocks are combined. For this reason, progress has not been made in making electromagnetic devices smaller and thinner. Further, even when a polarized relay is configured, it is difficult to make the relay smaller and thinner because in addition to the space for the electromagnetic device, a space for the device to move is also required.

[Purpose of the invention]

In view of the above, an object of the present invention is to provide a small and thin electromagnetic device.

[Disclosure of the invention]

In order to achieve the above object, the present invention includes an iron core provided inside the mouth-shaped yoke, and the tip of the iron core is connected to the central magnetic pole part.
It is equipped with an electromagnet block with opposite magnetic poles at both ends of the mouth-shaped yoke, and an armature block consisting of a small number of permanent magnets and pieces of magnetic material that sandwich the permanent magnet from both sides in the magnetization direction. It is housed within the yoke, and both blocks are combined so that the central magnetic pole at the tip of the iron core enters the armature block.
The gist is an electromagnet device in which an armature block is moved in forward and reverse directions within a U-shaped yoke by changing the excitation polarity of the coil. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 1bl shows an electromagnet block 1 used in the first and second embodiments of the present invention. In addition, the coil,
The illustration of the coil frame is omitted. This electromagnetic block 1
The iron core 3 is provided in the mouth-shaped yoke 2 (Ill),
Both ends of the mouth-shaped yoke 2 are connected to opposing magnetic pole parts 2a, 2b and an iron core 3.
The tip of the center magnetic pole portion 3a is the central magnetic pole portion 3a.

FIG. 1(b) shows a first embodiment of the present invention.

As seen in FIG. 1, this electromagnet device includes an electromagnet block 1 and an armature block 4.

The armature block 4 has a square shape with two magnetic pieces 5a and 5b at both ends sandwiching two permanent magnets 6 and 6 from both sides in the same magnetization direction. The central magnetic pole 6FI13a at the tip of the iron core 3 enters into this square-shaped armature block 4,
The armature pro-rough 4 is housed flush within the mouth-shaped yoke 2 so as to be symmetrical with respect to the central magnetic pole portion 3a. Note that 7 is a coil and 8 is a coil frame.

When a current is applied to the coil 7 and the central magnetic pole portion 3a is excited to the north pole and the opposing magnetic pole portions 2a and 2b are excited to the south pole, the armature block 4 moves inside the mouth-shaped yoke 2 due to the repulsion of the same polarity and attraction of the different polarity. , move in the direction of arrow A, as shown in Fig. 1 1bl,
The magnetic piece 5a is in contact with the opposing magnetic pole part 2a, and the magnetic piece 5b is in contact with the central magnetic pole part 3a. Since this electromagnet device is of a latching type, it maintains its state even if the current flowing through the coil 7 is reduced to zero. When the current flowing through the coil 7 is reversed, the central magnetic pole part 3a becomes the S pole and the opposite magnetic pole part 2 becomes the S pole.
a and 2b are each excited to the N pole, and the armature block 4
is moved in the direction of arrow B by the mouth-shaped yoke 2 due to the repulsion of the same polarity and attraction of the different polarity, and the magnetic piece 5a is moved to the central magnetic pole part 3a, and the magnetic piece 5b is moved to the opposing magnetic pole part 2b. touch each other. Even when the current in the coil 7 is reduced to 0, this state is maintained. Such movement of the armature block due to a change in the excitation polarity of the coil is transmitted to the contact mechanism via a card serving as a contact drive unit, for example. Contacts open and close.

FIG. 2 shows a second embodiment of the invention. As shown in the figure, in the armature block 9 of this electromagnet device, both ends of one magnetic piece 5a and the other two magnetic pieces 10.11 each magnetize two permanent magnets 6.6 in the same way. It is sandwiched from both sides in a cursive shape. The central magnetic pole portion 3a at the tip of the iron core 3 enters into this mouth-shaped armature block 9, and the armature block 9 is housed flush within the mouth-shaped yoke 2. A current is passed through coil No. 7, and the central magnetic pole part 3a
When the opposing magnetic pole parts 2a and 2b are excited, the armature block 9 moves in the direction of the arrow in the U-shaped yoke due to the repulsion of the same polarity and attraction of the different polarity, and as shown in FIG.
a is in contact with the opposing magnetic pole portion 2a. However, the magnetic piece 10
and 11 are not magnetically connected, and the magnetic piece 10
．． 11 is not in contact with the central magnetic pole portion 3a either. For this reason,
Although the magnetic circuit is not a closed magnetic circuit, the state shown in FIG. 2 is maintained as long as there is magnetic flux from the electromagnet (that is, during excitation). When the current in the coil 7 is reduced to 0, the armature block 9 moves in the direction of arrow B inside the U-shaped yoke 2, and the magnetic pieces 10 and 11 move toward the opposite magnetic pole part 2.
b, and the magnetic piece 5a contacts the central magnetic pole portion 3a. In this case, the magnetic circuit is a closed magnetic path and is stable, so this state is maintained during non-excitation. The electromagnetic device shown here is of the single stipple type.

FIG. 3 (al indicates an electromagnetic block 12 used in the third and fourth embodiments of the present invention. The coil and coil frame are not shown in the illustration. This electromagnetic block 12 has a U-shaped yoke 2 An iron core 3' is provided inside the U-shaped yoke 2, and opposing magnetic pole parts 2a, 2b and iron core 3'
The tip of the center magnetic pole portion 3'a is the central magnetic pole portion 3'a. This iron core 3' has an L-shape in which a central magnetic pole portion 3'a extends along opposing magnetic pole portions 2a and 2b. Therefore, the central magnetic pole part 3'a
The area facing the magnetic material piece is increased, which has a positive effect on attraction and repulsion. Note that this L-shaped core may be manufactured by, for example, a method such as punching, and may be integrated inside the U-shaped yoke by a method such as caulking.

FIG. 3 fbl shows a third embodiment of the present invention.

As shown in Figure (b), the armature block 13 of this electromagnet device is U-shaped with the same side ends of the two magnetic pieces 5a and 5b sandwiching one permanent magnet 6 from both sides in the magnetization direction. ing. Inside this U-shaped armature block 13 is an iron core 3'.
The central magnetic pole portion 3'a at the tip of the armature block 13 is housed flush within the U-shaped yoke 2. Since this electromagnet device is of the latching type like the one in the first embodiment, the change in the excitation polarity of the coil 7 causes the armature block 13 to move within the U-shaped yoke in the direction indicated by the arrow.
They move forward and backward in the direction of arrow B, and maintain their respective states even when the excitation is turned off.

FIG. 4 shows a fourth embodiment of the invention. As seen in the figure, in the armature block 13' of this electromagnetic device, one of the two magnetic pieces 5a, 5b (for example, 5b) in the armature block 13 of the third embodiment is
For example, it is shorter than 5a). Therefore, compared to the opposing area between the magnetic piece 5a and the magnetic pole part, the opposing area between the shorter magnetic piece 5'b and the magnetic pole part is smaller, and this electromagnet device is of a single stipple type. It has become.

That is, by passing a current through the coil 7, the central magnetic pole portion 3'a,
When the opposing magnetic pole parts 2a and 2b are excited, the armature block 13' moves in the direction of arrow B within the U-shaped yoke 2 due to the repulsion of the same polarity and attraction of the different polarity, and the magnetic piece 5a moves towards the central magnetic pole part 3'a. , and the magnetic piece 5'b contacts the opposing magnetic pole portion 2b. This state is maintained during energization, but when the energization is cut off, the armature block 13' moves in the direction of arrow A within the U-shaped yoke.
The magnetic piece 5a contacts the opposing magnetic pole portion 2a, and the magnetic piece 5'b contacts the central magnetic pole portion 3'a.

This state is maintained during non-excitation.

FIG. 5 shows a fifth embodiment of the invention. As seen in the figure, this electromagnet device is different from the electromagnet device of the third embodiment in that the facing area of the opposing magnetic pole portions is on one side (for example, 2b
) is smaller than the other (for example, 2a). That is, one end of the U-shaped yoke 2' is an opposing magnetic pole section 2a, and the other end is an opposing magnetic pole section 2'b in which a notch is formed.

When a current is applied to the coil 7 and the central magnetic pole section 3'a and the opposing magnetic pole sections 2a and 2'b are excited, the armature block 13 is caused to repel the U-shaped yoke 2' due to repulsion of the same polarity and attraction of the different polarity. The magnetic piece 5a comes into contact with the central magnetic pole part 3'a, and the magnetic piece 5b comes into contact with the opposing magnetic pole part 2'b. In this case, although the magnetic flux of the permanent magnet 6 is weak,
This state is maintained as long as there is magnetic flux from the electromagnet. When the current in the coil 7 is set to 0, the armature block 13 moves in the direction of arrow A within the U-shaped yoke 2', and the magnetic piece 5a moves to the opposing magnetic pole part 2a, and the magnetic piece 5b moves to the central magnetic pole part 31. a
touch each other. In this case, since the magnetic flux of the permanent magnet 6 is strong and stable, this state is maintained during non-excitation. This electromagnetic device is also of the single stipple type.

Note that in FIGS. 1 to 5, the same numbers refer to the same parts.

The electromagnet device of the present invention is not limited to the above-mentioned embodiments, and various types can be made. Below, some other examples will be illustrated.

In the above example, there was one central magnetic pole part, but one end of the iron core was shaped like an opening to make two central magnetic pole parts, and the permanent magnet was placed inside the opening shape, and the armature block was It may be shaped. It is also possible to have three or more central magnetic pole parts. The number of permanent magnets in the armature block can also vary depending on the number of central magnetic pole parts. When obtaining a single stipple type as in the fourth embodiment, one of the two magnetic pieces of the armature block may be shorter than the other, or the length may remain the same, A cutout or a hole may be provided in either side. A non-magnetic material may be provided in the shortened portion and the notched hole portion (for example, provided flush) so that the shape is symmetrical.

When obtaining a single stipple type as in the fifth embodiment, one of the opposing magnetic poles may be cut out to make the opposing area smaller than the other, or a hole may be provided in one of the opposing magnetic poles. For example, the facing area can be made smaller than the other. A nonmagnetic material may be provided in the cutout or hole portion. However, when the facing area of one facing magnetic pole part is made smaller than the other, the magnetic piece facing the other facing magnetic pole part (that is, the one with a larger facing area) is more magnetic than the magnetic piece facing one facing magnetic pole part. It is preferable that the body pieces have a larger opposing area. Further, in the above example, the armature block was housed flush within the U-shaped yoke, but it may naturally be housed inside the U-shaped yoke. The iron core and the mouth-shaped yoke may be formed integrally from the beginning, or may be manufactured separately and then integrated by a method such as caulking. What is the iron core and magnetic pole part?
They may be formed integrally, or may be formed separately and then integrated.

In the electromagnet device of the present invention, an iron core is provided inside the square-shaped yoke, and the armature block is also housed within the U-shaped yoke, so that the armature block can move in forward and reverse directions within the U-shaped yoke. Therefore, the size of this electromagnet device is determined by the size of the mouth-shaped yoke. Therefore, the electromagnetic device of the present invention is extremely compact. Further, for example, by reducing the thickness of the iron core in the direction of movement of the armature block, the structure can be made thinner. By constructing a polarized relay using this electromagnetic device, it is possible to easily create a very small and ultra-thin relay.

〔Effect of the invention〕

In the electromagnet device of this invention, an iron core is provided inside the opening-shaped yoke, and the armature block is also housed within the U-shaped yoke, so that the armature block can move in forward and reverse directions with the opening-shaped yoke. Because of this, it is extremely small and thin, and does not require any space for movement outside the device. −

[Brief explanation of drawings]

FIG. 1 ia) shows the first part of this invention. FIG. 1 is a perspective view of an electromagnetic block used in the second embodiment (bl is a perspective view of the first embodiment of the present invention, FIG. 2 is a perspective view of the second embodiment of the present invention, Figure 3+al is a perspective view of the electromagnetic block used in the third and fourth embodiments of this invention, and Figure 3 (
bl is a perspective view of the third embodiment of this invention, and FIG.
FIG. 5 is a perspective view of the fourth embodiment of the invention. FIG. 5 is a perspective view of the fifth embodiment of the invention. 1.12.12'...Electromagnetic block 2.2'...
- Mouth-shaped yoke 2a, 2b, 2'b...Opposing magnetic pole part 3.3'...Iron core 3a, 3'a...Central magnetic pole part 4
．． 9.13.13'... Armature block 5a. 5b, 10, 11.5'b...Magnetic material piece 6...Permanent magnet

Claims (7)

[Claims] (1) An electromagnetic block in which an iron core is provided inside a U-shaped yoke, the tip of the iron core is a central magnetic pole, and both ends of the U-shaped yoke are opposed magnetic poles, at least one permanent magnet, and permanent magnets are inserted from both sides in the magnetization direction. This armature block is housed in a U-shaped yoke, and both blocks are assembled so that the central magnetic pole at the tip of the iron core enters the armature block. An electromagnetic device in which the armature block moves in forward and reverse directions within a U-shaped yoke by changing the excitation polarity of the coil. (2) The electromagnet device according to claim 1, wherein the armature block has a rectangular shape with both ends of two magnetic pieces sandwiching two permanent magnets from both sides in the same magnetization direction. (3) The armature block is U-shaped, with both ends of one magnetic piece and two other magnetic pieces sandwiching two permanent magnets from both sides in the same magnetization direction. Electromagnetic device as described in section. (4) In the armature block, the same side ends of the two magnetic pieces are 1
The electromagnet device according to claim 1, wherein the electromagnet device has a U-shape with two permanent magnets sandwiched from both sides in the direction of magnetization. (5) The electromagnet device according to claim 4, wherein the iron core has an L-shape in which the central magnetic pole portion extends along the opposing magnetic pole portions. (6) The electromagnet device according to claim 4 or 5, wherein one of the two magnetic pieces is shorter than the other. (7) The electromagnet device according to any one of claims 1 to 6, wherein the facing areas of the facing magnetic pole parts are smaller on one side than on the other side.