JPS6217334B2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention provides a permanent magnet in a magnetic circuit composed of an armature and a yoke, and superimposes the magnetomotive force of a coil on the magnetic flux of this permanent magnet. The present invention relates to a so-called polarized electromagnetic relay that moves an armature, and particularly to a polarized electromagnetic relay that moves an armature up and down.

(Background technology) A general polarized electromagnetic relay has a structure in which the center of an armature is rotatably supported, and the armature swings and contacts two armature surfaces of a yoke at diagonal positions. There is.

In the case of a polarized electromagnetic relay with such a structure, if the three points of both diagonal armature faces of the armature and the center pivot shaft are not positioned accurately due to dimensional accuracy, only one armature face will touch. This phenomenon occurs, and there is a problem in that the unbalance of the air gap causes sensitivity variations and furthermore, an insufficient stroke of the armature.

Therefore, it has already been proposed to solve this problem by adopting a structure in which the armature is moved up and down.

For example, Patent Application Publication 1980 issued by the Japan Patent Office
Publication No. 41005 (hereinafter referred to as the first prior art)
is proposed. The figure shows a horizontal reciprocating transition.

To explain this in FIG. 3, the left vertical piece 10
2. The middle vertical piece 103 and the right vertical piece 104 form an E-type yoke 101, the middle vertical piece 103 is equipped with a coil 105, and the upper, middle, and lower three vertical pieces 102, 103, 1
One permanent magnet 106 that also serves as an aperture common to 04 is flushed facing each other, and the direction of magnetic flux from this permanent magnet 106 is the direction shown by X, and the direction of the magnetic flux from the coil 105 is the direction shown by Y.

Therefore, the magnetic flux directions X and Y of the gap between each vertical piece 102, 103, 104 and the permanent magnet 106 are opposite to each other, that is, they repel each other, and the permanent magnet 106 as an armature is lowered in the direction Z of the arrow.

Subsequently, when the coil current flows so that the magnetomotive flux direction of the coil 106 is in the opposite direction, the permanent magnet 1
The permanent magnet 106, which is an armature, is attracted in the same direction as the magnetic flux Y of 06 and superimposed thereon.

In the polarized electromagnetic relay according to the first prior art, the coil 1 is connected through the permanent magnet 106.
Since the magnetomotive flux of 0.05 passes through it, it has the following problem. That is, the magnetic resistance of the permanent magnet 106 is about 10,000 times higher than that of a general yoke (iron), and the loss rate of the magnetic flux of the coil 105 is high, which poses a problem in increasing the sensitivity of the device. .

In order to solve the above problems, a polarized electromagnetic relay having a structure as disclosed in French Patent No. 2358006 (hereinafter referred to as the second prior art) has been proposed.

This is an advantage of high sensitivity due to the fact that the magnetomotive flux of the coil does not pass through the permanent magnet.

To explain this according to FIG. 4, a U-shaped yoke 201 is composed of upper and lower magnetic pieces 202, 203 and a core 210a, and a permanent magnet 207 and a first Magnetic piece 20
5 and a second magnetic piece 206 in contact with the other pole of this permanent magnet constitute an armature block 204. The first magnetic piece 205 is formed in a U-shape, and the magnetic pieces 208, 209 above and below it are formed into a U-shape. are facing the upper and lower outer surfaces of the upper and lower magnetic pieces 202 and 203 of the U-shaped yoke 201. The second magnetic piece 206 is the upper and lower magnetic pieces 202, 2 of the U-shaped yoke 201.
A permanent magnet 207 is sandwiched between the first and second magnetic pieces 205 and 206, facing the upper and lower inner surfaces of the magnet 03. Coil 210 is attached to U-shaped yoke 201.

In the case of this second prior art, the magnetic flux
5, 206 and return to the other pole of the permanent magnet 207, and the second magnetic piece 20 of the armature block 204 from one pole of the permanent magnet 207.
6. U-shaped yoke 201 and armature block 2
Permanent magnet 20 via the first magnetic piece 205 of 04
The magnetic flux from the coil 210 flows through the magnetic path returning to the other pole of the armature block 210a and the upper and lower magnetic pieces 203 of the U-shaped yoke 201 (lower magnetic piece 202 when the armature block is reversed), and the first magnetic piece 205 of the armature block. , permanent magnet 207,
The second magnetic piece 206 and the lower magnetic piece 202 of the U-shaped yoke 201 (when the armature block is reversed,
It flows through a magnetic path via the upper magnetic piece part 203).

Therefore, when the magnetic flux directions X and Y in the gap between the magnetic poles of the armature block 204 and the U-shaped yoke 201 are opposite to each other, they repel, and when they are in the same direction, they are attracted, so the armature block 204 , move up and down depending on the current direction of the coil 210.

As is clear from the figure, in this second prior art, the magnetic flux Y of the coil 210 does not flow through the permanent magnet 207, which solves the problem in the first prior art.

However, this second prior art has other problems due to the adoption of a structure that includes a permanent magnet in the armature block.

That is, since the armature block that is driven to drive the contact has a permanent magnet, the operating speed of the armature block is slow due to the weight of the permanent magnet 207, and since the armature block further increases, the impact force increases and vibrations are accelerated. be done. Furthermore, due to the relationship with gravity, the characteristics may become unbalanced depending on the mounting direction.

Further, the practical implementation of raising and lowering the armature in a polarized electromagnetic relay has not yet been disclosed and is not easy.

As a third prior art, for example, US Patent No.
There is a specification of No. 2794882, which is a so-called non-polar electromagnetic relay that is not equipped with a permanent magnet.

(Objective) The present invention solves the various problems in the conventional polarized electromagnetic relays, and at the same time provides a polarized electromagnetic relay that is advantageous in the manufacture and application of polarized electromagnetic relays. According to the present invention, a permanent magnet is interposed between the first yoke and the second yoke, and this is connected to the upper and lower pieces that face and separate from the upper and lower armature surfaces of the upper and lower first and second yokes, and the coil By forming a vertically lifting type armature with a vertical bar passing through the shaft, new developments can be made by utilizing the advantages of the vertically raising and lowering type armature.

Another object of the present invention is to reduce the loss rate of the magnetomotive flux of the coil by preventing the magnetic flux of the coil from passing through the permanent magnet, thereby achieving high sensitivity.

Another object of the present invention is to minimize the mass of the armature by not equipping the armature with a permanent magnet, thereby increasing the operating speed of the armature.

Another object of the present invention is to implement a polarized electromagnetic relay of the type in which the armature is raised and lowered.

This polarized electromagnetic relay is shown in FIGS. 1 and 2. First of all, FIG. 1 is a diagram of the basic principle, and the first yoke 1 has upper and lower pieces 2 and 3 connected together. It is formed into a U-shape with a vertical piece 4 that bends, and the upper and lower pieces 2 and 3 have their upper and lower inner surfaces connected to the polarized surfaces 2a and 3a.
It is said that The second yoke 5 has a length shorter than the distance between the upper and lower pieces 2 and 3 of the first yoke 1, and faces the vertical piece 4. The upper and lower outer surfaces of this second yoke 5 are the polarized surfaces 5
a, 5b. The permanent magnet 6 is the first yoke 1
and the second yoke 2, and its magnetization axis direction is horizontal. Although the first and second yokes 1 and 5 and the permanent magnet 6 are arranged as one block on the left and right sides, it is of course possible to use only one block. The armature 7 is of a vertically elevating type, and is formed into an H shape with upper and lower pieces 8 and 9 and a vertical bar 10 that connects these upper and lower pieces 8 and 9, and both upper and lower sides of the upper and lower pieces 8 and 9 are The contact surfaces are 8a, 8b, 9a, and 9b. The upper and lower inner and outer contact surfaces 8a of the upper and lower pieces 8, 9,
8b, 9a, 9b are the first and second yokes 1, 5
The upper and lower inner and outer contact surfaces 2a, 3a, 5a, and 5b are opposed to each other, forming air gaps a, b, c, and d, respectively. A vertical bar 10 of the armature 7 passes through the coil 11.

The magnetic circuit between the permanent magnet 6 and the coil 11 is shown in FIG. 1 as a basic principle diagram, where the solid line
It is the magnetomotive flux of 1.

In FIG. 1, the magnetic flux X of the permanent magnet 6 flows as follows.

N pole of permanent magnet 6 → second yoke 5 → air gap b and c → upper and lower pieces 8, 9 of armature 7 → air gap a, b → upper and lower pieces 2, 3 of first yoke 1
→ Vertical piece 4 → becomes S pole.

The magnetic flux Y of the coil 11 flows as follows.

Coil 11 → Vertical bar 10 of Amachiya 7 → Lower piece 8 →
Air gap a → lower piece 2 of first yoke 1 → vertical piece 4 → upper piece 3 → air gap d → upper piece 9 of armature 7 → vertical bar 10.

Also, from the lower piece 8 of the armature 7 to the air gap b
→ 2nd yoke 5 → air gear c → armature 7
The top piece 9 becomes the vertical bar 10.

Therefore, when observing the air gaps a, b, c, and d, we find that the magnetic fluxes X, Y of the permanent magnet 6 and the coil 11 are
Air gaps a and c are in the same direction, and air gaps b and d are in opposite directions.

Therefore, the first and second yokes 1 and 5 and the armature 7
This means that the magnetic fluxes X and Y overlap in the same direction and an attractive force acts, and in the opposite direction, they cancel each other out and a repulsive force acts, so in Fig. 1, the armature 7 descends in the downward direction indicated by the arrow Z. The outer contact surface 8 of the lower piece 8 of the armature 7
a and the inner pole surface 2a of the lower piece 2 of the first yoke 1 are attracted to each other, and furthermore, the inner pole surface 9a of the upper piece 9 of the armature 7 and the outer pole surface 5b of the second yoke 5 are attracted to each other.

This attracted state is maintained by the magnetic flux of the permanent magnet 6 even if the current flowing through the coil 11 is interrupted.

When the armature 7 is raised upward in the opposite direction to that described above, a current is passed through the coil 11 in the opposite direction to that described above, and the magnetomotive flux Y is caused to act in the opposite direction to that shown in FIG.

Air gaps a, b, c, and d are reversed to the above, air gaps a and c are in opposite directions, air gaps a and d are in the same direction, and the armature 7 rises in the upward direction shown by arrow W.

The attracted state is maintained by the magnetic flux of the permanent magnet 6, as described above.

Observing these, the magnetic flux Y of the coil 11
does not pass through the permanent magnet 6, which has a large magnetic resistance, resulting in high sensitivity.

FIG. 2 is an implementation of the basic principle of FIG.

The left and right first yokes 1 are housed in a box 12 made of synthetic resin and having an open top.

In this case, the left and right first yokes 1 are connected to the box 12.
It sits on the bottom wall 13 of and is surrounded by four side walls 04.

The winding frame 15 of the coil 11 has the following structure.

The coil 11 is wound around a winding trunk 16, and the winding trunk 16 has a hole 17 through which the armature 7 is inserted so as to be able to move up and down. A wall 19 is formed. The upper and lower pieces 2 and 3 of the first yoke 1 and the upper and lower pieces 8 and 9 of the armature 7 are located on the upper and lower circumferential walls 19. Further, the second yoke 5 and the permanent magnet 6 are arranged along the winding frame 15.

Furthermore, an angle-shaped flat spring 2 is attached to the bottom wall 13 of the box 12.
0 is seated on it, and the lower piece 2 of the first yoke 1 is placed on it.

Naturally, the lower locking portion 7a of the armature 7 faces downward and faces the top portion 20a of the chevron-shaped flat spring 20.

The upper opening of the box 12 is covered with a cover 21 made of synthetic resin and having an open bottom.

This cover 21 has the following structure.

The lower opening of the cover 21 communicates with the upper opening of the box 12, and the lower piece 23 of the U-shaped connecting body 22 is connected to the cover 21 by an upper retaining portion 7b of the armature 7.
A second angle-shaped flat spring 25 is inserted into the small hole 24 of both side pieces 23, and both ends 25b of the second angle-shaped flat spring 25 are placed against both receiving stages 26 of the cover 21. This angle-shaped flat spring 25 acts on the armature 7 and on the same axis as the armature 7, a movable table 27 which is vertically movable. Therefore, the lower chevron-shaped flat spring 20 always presses the armature 7 and the movable base 27 upward, and the upper chevron-shaped flat spring 25 presses downward. Movable stand 2
7 and the connecting body 22 are connected to the connecting body 22 by attaching the pieces 2 on both sides to the connecting body 22.
The shaft 30 is inserted into the shaft hole 28 of No. 3 and the shaft hole 29 of the movable table 27.
Do it through. The box 12 and the cover 21 are connected together by a connecting screw 31.

Furthermore, the cover 21 is equipped with terminal fittings 33 having fixed contacts 32 on the left and right sides. The movable contact plate 35 of the movable contact 34 corresponds to the left and right fixed contacts 32, and the contact pressure spring 37 is inserted into the elongated hole 36 of the movable base 27.
It is stored with.

(Effects) As described above, the present invention interposes the permanent magnet 6 between the first yoke 1 and the second yoke 5, and separates the first and second yokes 1 and 5 so as to face the upper and lower polarized surfaces. The upper and lower pieces 8 and 9 which are separated by
Since the vertical rod 10 passing through the coil 11 forms the vertically lifting type armature 7, the coil 11 is attached to the permanent magnet 6.
The magnetic flux does not pass through the coil, which reduces the loss rate of the coil's magnetomotive flux, resulting in high sensitivity.Moreover, the armature 7 is not equipped with a permanent magnet 6, minimizing the mass of the armature, improving operating speed. do.

Furthermore, the present invention houses the first and second yokes 1, 5, the armature 7, the coil winding frame 15, etc. in the box 12 with the upper opening and the cover 21 with the lower opening. The so-called bistable spring 2 maintains that state after operating either up or down.
0.25, it has the effect of making it possible to implement an up-and-down type polarized electromagnetic relay.

[Brief explanation of the drawing]

1 and 2 of the drawings show an embodiment of the polarized electromagnetic relay of the present invention.
The figure is a sectional view of a concrete structure, and FIGS. 3 and 4 are conventional examples. 1...First yoke, 2...Lower piece, 3...Upper piece,
4...Vertical piece, 5...Second yoke, 6...Permanent magnet, 7...Amachia, 8...Lower piece, 9...Upper piece,
10... Vertical piece, 11... Coil, 12... Box, 13... Bottom wall, 14... Side wall, 15... Winding frame, 20, 25... Spring, 21... Cover, 27
...Movable platform.

Claims (1)

[Claims] 1 A U-shaped first yoke consisting of upper and lower pieces with the upper and lower inner surfaces as polarized surfaces, and a vertical piece that connects these upper and lower pieces; a second yoke whose outer surface is a polarized surface; a permanent magnet interposed between the vertical piece of the first yoke and the second yoke with its magnetization axis being horizontal; It is a vertically lifting type armature that separates from the inner and outer pole surfaces of the yoke, and this armature has both inner and outer surfaces facing the armature surfaces of the upper and lower pieces of the first yoke and the armature surfaces of the second yoke as armature surfaces. The coil is made up of upper and lower pieces, and a vertical bar that connects the upper and lower pieces, and the vertical bar of the armature moves up and down through the coil, and the coil, the first and second yokes, the permanent magnet, and the armature are placed in a box with an upper opening. , the armature is housed so that it can move up and down perpendicularly to the bottom wall of the box, and furthermore, there is a movable base that can be raised and lowered, a contact plate of multiple movable contacts equipped on the movable base, and a fixed contact that separates from the movable contact. The contact plate, the movable base, both contacts, and the contact plate of both contacts are housed in a lower opening cover, and the movable base is located on the same axis as the armature of the box, and the armature and the movable base are placed in the middle. A polarized electromagnetic relay characterized by having springs acting in opposite directions on the armature and the movable base, which are connected by a connecting body located at.