JPS6217333B2 - - 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 the armature, and particularly to a polarized electromagnetic relay that moves the armature horizontally back and forth.

(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 a polarized electromagnetic relay with such a structure, if the three points of both diagonal armature surfaces of the armature and the center pivot shaft are not maintained accurately for dimensional accuracy, only one armature surface will come into contact. 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 horizontally reciprocated.

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.

To explain this in FIG. 6, the upper piece 10
2. E-shaped yoke 10 with middle piece 103 and lower piece 104
1, the middle piece 103 is equipped with a coil 105,
The upper, middle, and lower three pieces 102, 103, and 104 are faced with a permanent magnet 106 that also serves as an armature, and the direction of the magnetic flux from this permanent magnet 106 is the direction indicated by The direction of the magnetic flux is the direction indicated by Y.

Therefore, the magnetic flux directions X and Y of the gap between each 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 horizontally moved in the direction Z of the arrow.

Subsequently, when a coil current flows so that the magnetomotive flux direction of the coil 105 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 X 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 larger than that of a general yoke (iron), and the loss rate of the magnetomotive flux of the coil 105 is high, which deteriorates (decreases) the sensitivity of the device. There is a problem with this point.

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. 7, the left and right vertical magnetic pieces 202, 203 and the core (not shown)
constitutes a U-shaped yoke 201 with a permanent magnet 207 and a first pole in contact with one pole of this permanent magnet.
The armature block 204 includes a magnetic piece 205 and a second magnetic piece 206 in contact with the other pole of the permanent magnet.
The left and right vertical pieces 208, 20 are formed in a letter shape.
Reference numeral 9 denotes the left and right vertical magnetic pieces 2 of the U-shaped yoke 201.
It faces the outer surface of 02 and 203. The second magnetic piece 206 faces the inner surfaces of the left and right vertical pieces 202, 203 of the U-shaped yoke 201, and
A permanent magnet 207 is held between the second magnetic pieces 205 and 206. The coil 210 is a U-shaped yoke 201
is equipped with.

In the case of this second prior art, the magnetic flux X (not shown) due to the permanent magnetic flux 207 is transmitted from one pole of the permanent magnet 207 to the permanent magnet 207 via the first and second magnetic pieces 205 and 206 of the armature block 204. and the permanent magnet 207 from one pole of the permanent magnet 207 via the second magnetic piece 206 of the armature block 204, the U-shaped yoke 201, and the first magnetic piece 205 of the armature block 204. The magnetic flux from the coil 210 flows through the core (not shown), the right vertical piece 203 of the U-shaped yoke 201 (or the left vertical piece 202 when the armature block is reversed), and the magnetic flux from the coil 210. First magnetic piece 2
05, permanent magnet 207, second magnetic piece 206 and U
It flows through a magnetic path via the left vertical piece 202 (or the left vertical piece 203 when the armature block is reversed) of the yoke 201.

Therefore, if the magnetic flux directions X and Y (not shown) in the gap between the magnetic poles of the armature block 204 and the U-shaped yoke 201 are opposite to each other, they will repel, and if they are in the same direction, they will be attracted. , the armature block 204 has a coil 210
horizontally shifts from side to side depending on the current direction.

As is clear from the figure, in this second prior art, the magnetic flux Y (not shown) of the coil 210 does not flow through the permanent magnet 207, thus solving 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.

Other problems with this second prior art are as follows. That is, since the yoke 201 exists only on the upper part of the armature block 204, and the armature block 204 requires a space above and below the guide during horizontal reciprocating movement, the armature block 204 is always drawn in the direction of the yoke 201 by that space. be.

Therefore, depending on the mounting condition, the direction of the yoke 201 changes, and due to the weight of the armature block 204, the characteristics become unbalanced as described above.

Moreover, the implementation of horizontal reciprocating movement of 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, the first and second yokes and the permanent magnet are arranged one above the other as one block, and the first and second yokes above and below By connecting the left and right side pieces that face and separate from the left and right armature surfaces of the coil and the horizontal rod passing through the coil to form a horizontally shifting type armature, the advantage of the horizontally shifting type armature is utilized. This will enable new development.

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 maintain balance by arranging yokes and permanent magnets above and below the armature, thereby preventing fluctuations in operating characteristics due to the mounting direction.

Another object of the present invention is to implement a polarized electromagnetic relay of a type in which the armature is horizontally shifted.

According to FIGS. 1 to 5, this polarized electromagnetic relay has a first yoke 1 that is U-shaped with left and right pieces 2 and 3 and a horizontal piece 4 that connects the left and right pieces 2 and 3. In addition, the left and right side pieces 2 and 3 have inner surfaces of each other as polarized surfaces 2a and 3a. The second yoke 5 has a length shorter than the distance between the left and right pieces 2 and 3 of the first yoke 1, and faces the horizontal piece 4. The left and right outer surfaces of the second yoke 5 serve as armature surfaces 5a and 5b. The permanent magnet 6 is interposed between the first yoke 1 and the second yoke 5, and its magnetization axis direction is perpendicular. This first,
The second yokes 1 and 5 and the permanent magnet 6 are arranged one above the other as one block. The armature 7 is of a horizontal transition type, and is formed into an H shape with left and right side pieces 8 and 9 and a horizontal bar 10 that connects these left and right side pieces 8 and 9. Both sides are polarized surface 8
a, 8b, 9a, 9b. The inner and outer contact surfaces 8a, 8b, 9a, 9b of the left and right side pieces 8, 9 are the inner and outer contact surfaces 2a, 3 of the first and second yokes 1, 5.
Facing a, 5a, 5b, air gap a,
Make b, c, and d respectively. A horizontal rod 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, and the solid line X
is the magnetic flux of the permanent magnet 6, and the dotted line Y is the magnetic flux of the coil 11.
is the magnetomotive flux of

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 → left and right side pieces 9, 9 of armature 7 → air gap a, b → left and right side pieces 2, 3 of first yoke 1 → horizontal piece 4 → S pole becomes.

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

Coil 11 → Horizontal rod 10 of armature 7 → Left side piece 8 → Air gap a → Left side piece 2 of first yoke 1
→ horizontal piece 4 → right side piece 3 → air gap d → right side piece 9 of armature 7 → horizontal rod 10.

Also, from the left side piece 8 of the armature 7 to the air gap b → the second yoke 5 → the air gap c → the right side piece 9 of the armature 7 → the horizontal 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
The air gaps a and c are in the same direction, and the 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 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 moves horizontally to the left as indicated by the arrow Z. The outer pole surface 8a of the left piece 8 of the armature 7 and the inner pole surface 2 of the left piece 2 of the first yoke 1
a are attracted to each other, and furthermore, the inner pole surface 9a of the right side 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 moved horizontally to the right in the opposite direction to the above, a current is passed through the coil 11 in the opposite direction to the 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 b and d are in the same direction, and the armature 7 is horizontally shifted to the right as indicated 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.

Furthermore, the armature 7 operates independently without fixing the coil 11 and the permanent magnet 6, and its mass is kept to a minimum.

2 to 5 are implementations of the basic principle of FIG. 1.

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

In this case, the upper and lower first yokes 1 are 90 mm from Fig. 1.
In the rotated state, it sits on the bottom wall 13 of the box 12, and the left side piece 2 and the horizontal piece 4 are in contact with the side wall 14.

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 passes.
Side walls 18 and 19 are formed integrally with the winding drum 16 on the left and right sides, and upper and lower second yokes 5 are arranged parallel to the coil 11 between the left and right side walls 18 and 19, as shown in FIG.
Fixed in a 90 degree rotation. This left and right side wall 1
8 and 19 are provided with notches 20 to facilitate fitting and fixing of the second yoke 5. Further, the right side wall 19 is provided with a groove 21 for inserting and equipping a receiving blade terminal fitting 22 to which the coil 11 is connected.

A cover 23 made of synthetic resin is placed over and fixed to the upper opening of the box 12. An insulating plate 24 is interposed between the cover 23 and the box 12.

This cover 23 has the following structure.

The cover 23 connects an upper wall 25, a side wall 26 including lowered side walls, this upper wall 25 and the lower both sides walls 26, and has an external separate 27 divided into a plurality of parts, and the same as this external separate 27. internal separate 28 of the position and this internal separate 28
It is formed by a lower opening cavity 29 which crosses the two.

External terminal fittings 3 are provided in both outer chambers divided by both side walls 26 and external separates 27 of the cover 23.
It is fixed at 0. This terminal fitting 30 has vertical plug blades 31 integrally formed on both sides of the rightmost end.
When the cover 23 and box 12 are combined, it is inserted into the receiving blade terminal fitting 22 of the coil winding frame 15 to complete electrical connection with the coil 11. The other terminal fitting 30 is provided with a fixed contact 32, which is located in internal chambers 33 on both sides divided by an internal separate plate 28.

Further, in the cavity 29 of the lower opening of the cover 23, a movable base 34 is located which moves parallel to the armature 7 made of synthetic resin.

This movable base 34 has a through-hole 35 formed at a position corresponding to the inner chamber 33 of the cover 23, and a contact plate 36 with protruding contacts 37 on both sides and a coil spring for contact pressure are installed here. It is equipped with 38. The contact point 37 of the movable table 34 and the contact point 32 of the cover 23 face each other in the inner chamber 33, and are separated when the movable table 34 moves.

The movable base 34 is prevented from falling by the insulating plate 24 described above.

The movable base 34 and the armature 7 are connected by a reversing lever 39.

The reversing lever 39 has a shaft 40 passed through its center, and this shaft 40 is inserted into the shaft hole 4 of the right side wall 19 of the coil winding frame 15.
1 is supported.

In the relationship between the reversing lever 39 and the armature 7, a shaft 42 is passed through its lower end, this shaft 42 is fitted into the groove 44 of the connecting body 43 from above, and the right end of the armature 7 is inserted into the connecting body 43 to apply the force. It is deformed under pressure and becomes a retaining portion 7b.

The left end of the armature 7 is similarly inserted into the left piece 8 and deformed under pressure to form a retaining portion 7a. At the same time as this prevention, a non-magnetic residual plate 45 is interposed. This plate 45 is provided to cut both ends of the magnetic characteristic curve of the permanent magnet 6 and use the most stable range.

In the relationship between the reversing lever 39 and the movable base 34, the upper end 39a thereof is hooked onto a notch 46 in the lower opening.

Therefore, when the armature 7 horizontally moves to the right as indicated by the arrow Z in FIG.
4 horizontally moves to the left as indicated by arrow V opposite to the armature 7, and the contacts 32 and 37 of each chamber are joined.
The bonding is maintained by the magnetic flux of the permanent magnet 6 according to the principle diagram shown in FIG.

The armature 7 is pressed in the direction of arrow Z by a chevron-shaped flat spring 47. This angle-shaped flat spring 47 has its top portion 47a pressed against the left side retaining portion 7a of the armature 7, and
Both ends 47b are in contact with the left side wall 14 of the box 12.

The movable base 34 is biased by a coil spring 48 in a direction opposite to the direction of arrow V. This coil spring 48
is located between the display column 49 of the movable base 34 and the left side wall 26 of the cover 23.

The spring pressures of these two springs 47 and 48 act on the armature 7 and the movable table 34 in opposite directions, so that the armature 7 attempts to move from the state where it is attracted by the magnetic flux of the permanent magnet 6 to the opposite direction. This makes it easier to separate when doing so.

The display column 49 of the movable table 37 is located on the upper wall 2 of the cover 23.
It protrudes from the small hole 50 of No. 5, and the internal operation can be confirmed from the outside at that position.

A terminal cover 51 is further provided on the upper wall 25 of the cover 23.
is covered. This terminal cover 51 has driver operation holes 53 for terminal screws 52 in number corresponding to the terminal fittings 30 on both sides.

The attachment is accomplished by extending the hook legs 54 on both sides and inserting them into the small holes 55 in the upper wall 25 of the cover 23.
Further, on both sides of the terminal cover 51, skirts 56 are suspended between the outer separators 27 of the cover 23 to minimize exposure of the terminal fittings 30.

(Effects) As described above, the present invention interposes the permanent magnet 6 between the first yoke 1 and the second yoke 5, and
The second yokes 1, 5 and the permanent magnet 6 are arranged one above the other as one block, and the left and right pieces 8 face and separate from the left and right polarized surfaces of the upper and lower first and second yokes 1, 5. 9 and the horizontal rod 10 passing through the coil 11 to form the horizontal transfer type armature 7, the magnetic flux of the coil 11 does not pass through the permanent magnet 6, and therefore the loss rate of the magnetic flux of the coil decreases. becomes lower, the sensitivity becomes higher, and the
In this case, the mass of the armature can be minimized without equipping the permanent magnet 6, and the operating speed can be improved.

Further, in the present invention, since the yokes 1 and 2 and the permanent magnets 6 are arranged above and below the armature 7, the vertical and horizontal balance can be maintained, and there is no change in operating characteristics depending on the mounting direction.

Further, in the present invention, a horizontally moving type armature 7, yokes 1, 2, coils 11, and permanent magnets 6 are housed in a box 12 with an upper opening, and a horizontally moving type movable base 34 and both contacts are arranged in a lower opening cover 23. The plates 30 and 36 are housed and arranged, and the upper and lower armatures 7 and the movable base 34 are connected by a reversing lever 39 with a central pivot. Since the so-called bistable state for maintaining this state is achieved by the springs 47 and 48, it is possible to implement a horizontal shift type polarized electromagnetic relay.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the polarized electromagnetic relay of the present invention.
The figure is a sectional view of a concrete structure, FIG. 3 is a sectional side view of FIG. 2, FIG. 4 is a sectional plan view, FIG. 5 is an exploded perspective view, and FIGS. 6 and 7 are conventional examples. It is a diagram. 1...First yoke, 2, 3...Left and right sides, 4...
Horizontal piece, 5... Second yoke, 6... Permanent magnet, 7
... Amachia, 8, 9 ... Left and right sides, 10 ... Horizontal bar, 11 ... Coil, 12 ... Box, 13 ...
... Bottom wall, 15 ... Winding frame, 23 ... Cover, 30,
36... Contact plate, 32, 37... Contact, 34...
Movable base, 39... Reversing lever, 47, 48... Spring.

Claims (1)

[Claims] 1 A U-shaped first yoke consisting of left and right side pieces whose inner surfaces are polarized surfaces and a horizontal piece connecting these left and right side pieces, and a U-shaped first yoke that faces the horizontal piece with a length shorter than the distance between the left and right side pieces. and a second yoke whose left and right outer surfaces are polarized surfaces, and a permanent magnet interposed with a magnetization axis perpendicular between the horizontal piece of the first yoke and the second yoke. The yoke, the second yoke, and the permanent magnet are arranged vertically as one block, and the armature is of a horizontal transition type and separates from the respective armature surfaces of the upper and lower first yokes and the second yoke. It is made up of left and right side pieces whose contact surfaces are both the inside and outside surfaces that face the contact surfaces of the left and right side pieces of the first yoke and the contact surfaces of the upper and lower second yokes, and a horizontal bar that connects these left and right side pieces. The coil, into which the horizontal rod of the armature is inserted so that it can move horizontally, the coil, the first and second yokes, the permanent magnet, and the armature are stored in a box with an opening at the top so that the armature can move horizontally against the bottom wall of the box. A horizontally moving movable base, a contact plate for a plurality of movable contacts equipped on this movable base, a contact plate for a fixed contact to be connected to the movable contact, and a contact plate for the movable base and both contacts. is stored in the lower opening cover, and a reversing lever whose upper and lower ends are reversed relative to each other about a central axis is arranged between the box and the cover, the upper end of this reversing lever is linked to the movable base, and the lower end is A polarized electromagnetic relay characterized in that the armature is linked to the armature, and springs are applied to the armature and the movable base in the same direction.