JPS5914232A - Polarized electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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, thereby increasing the armature. The present invention relates to a so-called movable polarized electromagnetic relay, and particularly to a polarized electromagnetic relay in which an armature is horizontally reciprocated.

(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 comes into contact with two armature surfaces of a yoke at diagonal positions. ing.

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 due to dimensional accuracy, only one armature surface will come into contact. This phenomenon occurs, and the unbalance of the air gap causes sensitivity variations and further causes 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 No. 41005 of 1980 issued by the Japan Patent Office (hereinafter referred to as the first prior art) has been proposed.

To explain this in FIG. 6, the upper piece 102, the middle piece 1
03, the lower piece 104 forms an E-shaped yoke 101, the middle piece 1
03 is equipped with a coil 105, and the upper, middle, and lower three pieces 102
, 103, 104, and the permanent magnet 106, which also serves as an armature, faces each other, and the direction of the magnetic flux from this permanent magnet 106 is the direction indicated by X, and the coil 10
The direction of the magnetic flux due to 5 is the direction indicated by Y.

Therefore, each month 102, 103, 104 and permanent magnet 106
Both magnetic flux directions X and Y in the gap are opposite to each other and repel each other, and the permanent magnet 106 as an armature is horizontally moved in the direction of the arrow 2.

Subsequently, when a coil current flows so that the magnetic east direction of the coil 105 is opposite to the magnetic flux X of the permanent magnet 106, the magnetic flux X of the permanent magnet 106 is superimposed on the permanent magnet 106.
is attracted.

Here, in the polarized electromagnetic relay according to the first prior art, since the magnetomotive flux of the coil 105 passes through the permanent magnet 106, it has the following problem. Already, 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. )
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 2
02, 203 and a core (not shown) constitute a U-shaped yoke 201, a permanent magnet 207, a first magnetic piece 205 in contact with one pole of this permanent magnet, and the other pole of this permanent magnet. The armature block 204 is composed of the second magnetic piece 206 in contact with the first magnetic piece 20
5 is formed into a U-shape, and its left and right vertical pieces 208, 20
9 are the left and right vertical magnetic pieces 202 of the U-shaped yoke 201.
It faces the outer surface of 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 the eleventh second magnetic piece 205, 206
A permanent magnet 207 is held between them. Coil 210 is mounted on U-shaped yoke 201.

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 first and second magnetic pieces 205 of the armature block 204,
206 and return to the other pole of the permanent magnet 207 from one pole of the permanent magnet 207 to the second magnetic piece 206 of the armature block 204, the U-shaped yoke 201, and the first magnetic piece of the armature block 204. It flows through a magnetic path via the magnetic piece 205 and back to the other pole of the permanent magnet 207. The magnetic flux Y due to the coil 210 is generated by the core (not shown), the right vertical piece 203 of the U-shaped yoke 201 (the left vertical piece 202 when the armature block is reversed), the first magnetic piece 205 of the armature block, and the permanent magnet. 207, 2nd
Magnetic piece 206 and left vertical piece 20 of U-shaped yoke 201
2 (When reversing the armature block, the left vertical piece 203
) flows through a magnetic path.

Therefore, the armature block 204 and the U-shaped yoke 20
Both magnetic flux directions x, y (
(not shown) are repelled when they are in opposite directions and are attracted when they are in the same direction, so the armature block 2
04 horizontally shifts from side to side depending on the current direction of the coil 210.

As is clear from the figure, this second prior art has a permanent magnet 2
The magnetic flux Y (not shown) of the coil 210 does not flow through the coil 210, which solves the problem in the first prior art.

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

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 as the block increases, the impact force increases and vibrations occur. is promoted. Furthermore, due to the relationship with gravity, the characteristics 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 vertical clearance with respect to the guide during its horizontal reciprocating movement,
This is the point that is drawn toward the yoke 201 due to its spatial distribution.

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. 279488
There is a specification No. 2, which is a so-called non-polar electromagnetic relay that is not equipped with a permanent magnet.

(Purpose) The present invention solves various problems in conventional polarized electromagnetic relays, and at the same time, provides a method for manufacturing polarized electromagnetic relays.
It also provides a polarized electromagnetic relay that is advantageous in applications. 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 concentrically, and the first... By connecting the left and right side parts facing and separating from the left and right polarized surfaces of the second yoke and the horizontal rod passing through the coil to form a horizontally shifting armature, the advantage of the horizontally shifting armature is utilized. By doing so, new developments can be made.

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.

Still another object of the present invention is to maintain balance by arranging the yoke and the permanent magnet concentrically around the armature, thereby preventing variations in operating characteristics due to the mounting direction.

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

According to FIG. 1, this polarized electromagnetic relay has a first yoke 1
is formed by left and right side parts 2.3 and a horizontal part 4 that connects the left and right side parts 2.3, and the left and right side parts 2.3 have inner surfaces of each other as polarized surfaces 2a and 3a. There is. The second yoke 5 has a length shorter than the length between the left and right side parts 2.3 of the first yoke 1,
It faces the horizontal part 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 and the second yoke 5, and its magnetization axis direction is perpendicular. This first. The second yoke 1.5 and the permanent magnet 6 are arranged concentrically. The armature 7 is of a horizontal transition type, and has left and right side parts 8.9 and a horizontal bar 10 that connects the left and right side parts 8.9.
The inner and outer surfaces of the left and right side parts 8 and 9 are formed by an armature surface 8a.

8b, 9a, and 9b. The inner and outer contact surfaces 8a, 8b, 9a, and 9b of the left and right side pieces 8.9 are the inner and outer contact surfaces 2a, 3a of the first and second yokes 1.5.

Facing 5a and 5b, air gaps a, b, and c.

Do each of d. The horizontal rod 10 of the armature 7 is attached to the coil 11.
is penetrated.

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 X is the magnetic flux of the permanent magnet 6 and the dotted line Y is the magnetomotive flux of the coil 11.

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 parts 8.9 of armature 7 -> air gap a
, d - left and right side parts of the first yoke 2° 3 - horizontal part 4 - 8 poles.

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

Coil 11-Horizontal rod 10 of armature 7-Left side 8-Air gap a-Left side 2 of first yoke 1-Horizontal portion 4-Right side 3-Air gap d-Right side 9 of armature 7-Horizontal rod 10 Become.

Also, from the left side 8 of the armature 7 to the air gap b → the second
Yoke 5 - Air gap C - Right side of armature 7 9 -
It also serves as a horizontal bar 10.

So, when we observe the air gaps a, b, c, and d, we find that
The directions of the magnetic fluxes X and Y of the permanent magnet 6 and the coil 11 are the same in the air gaps a and C.

Therefore, the first. The second yoke 1.5 and the armature 7 have magnetic fluxes X and Y superimposed in the same direction and an attractive force acts on them, and in the opposite direction they cancel each other out and have a repulsive force, so in Fig. 1, the armature 7 The outer contact surface 8a of the left side 8 of the armature 7 and the left side 2 of the first yoke 1 move horizontally to the left as indicated by arrow 2.
The inner contact surface 2a of the armature 7 is attracted to the inner electrode surface 2a of the armature 7, and
The inner contact surface 9a of the second yoke 5 and the outer contact 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 cut off.

When moving the armature 7 horizontally to the right, contrary to the above, a current in the opposite direction to the above is passed through the coil 11, and the magnetic flux Y
is made to act in the opposite way to that in Figure 1.

Air gaps a, b, c, and d are reversed to the above, air gaps a and C are in opposite directions, and air gaps b and d are in the same direction, and armature 7 moves horizontally 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 magnetomotive flux Y of the coil 11 does not pass through the permanent magnet 6 having a large magnetic resistance, resulting in high sensitivity.

Moreover, the armature 7 performs independent operation 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 first yoke is housed in a box 12 made of synthetic resin and having an open top. At this time, the outer circumferential surface of the horizontal portion 4 of the first yoke l is fixed by a pair of supporting portions 103 fixed to the front and rear side walls 14 with a slight distance from the bottom wall 13 of the box 12. Left side 2 of first yoke 1
is in contact with the left side wall 14 of the box 12.

Referring to FIG. 5, the first yoke 1 includes an integrally formed cylindrical horizontal portion 4, a disk-shaped left side portion 2, and a disk-shaped right side portion 3. The second yoke 5 is formed into a cylindrical shape having an outer diameter smaller than the inner diameter of the horizontal portion 4 of the first yoke 1. A pair of notches 104 are formed at the right end of the second yoke 5.

The permanent magnet 6 is formed into a cylindrical shape, and the outer diameter of the permanent magnet 6 is equal to the inner diameter of the first yoke 1 by t1.
The inner diameter of the second yoke 5 is formed to be equal to the outer diameter of the second yoke 5.

The armature 7 includes a horizontal rod 10 having a cylindrical columnar part 100 and fitting protrusions 101 and 102 formed on both left and right ends of the columnar part 100, and a substantially disk-shaped columnar part 10 that is fitted into the fitting protrusions 101 and 102. It consists of left and right side parts 8.9.

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, and disk-shaped side parts 18 and 19 are formed integrally with the winding trunk 16 on the left and right sides. However, the second yoke 5 is fixed radially outwardly and concentrically with the coil 11 between the left and right side parts 18 and 19. This right side portion 19 is provided with a protrusion 20 to facilitate fitting and fixing of the notch 104 of the second yoke 5. Also, the right side 19
is provided with a groove 21 for drawing out the coil wire 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 has an upper wall 25, a side wall 26 including lowered side walls, and an external separator (27. ! :, an internal separate 28 at the same position as this external separate 27,
A lower opening cavity 29 crosses this internal separate 28.

External terminal fittings 30 are fixed to both outer chambers divided by both side walls 26 and external separates 27 of the cover 23. This terminal fitting 30 has vertical plug blades 31 integrally formed on both sides of the rightmost end, and when the cover 23 and box 12 are combined, the coil wire is pulled out from the groove 21 of the coil winding frame 15. and complete the electrical connections. 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 contact points 37 protruding on both sides and a contact plate 36 for contact pressure. A coil spring 38 is provided. Contact point 3 of this movable base 34
7 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 coupled by a reversing lever 39.

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 horizontal bar 10 of the armature 7 is inserted into the connecting body 43. It is inserted and deformed under pressure, and is used as a stopper portion 7b.・The left end of amateur 7 is also the left side 8.
It is inserted into and deformed under pressure, and is pulled out to form a stop portion 7a. At the same time as this removal is stopped, a non-magnetic regular 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 into a cutout 46 of the lower opening.

Therefore, when the armature 7 horizontally moves to the right as indicated by the arrow Z in FIG. The contact point 32 of each chamber is horizontally moved to the left as indicated by the arrow V of
．． 37 joins.

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 in contact with the left side stop portion 7a of the armature 7, and both ends 47b 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 base 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 protrudes from a small hole 50 in the upper wall 25 of the cover 23, and from that position, the internal operation can be confirmed from the outside.

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

Also, to install it, put out the hook feet 54 on both sides and attach the cover 23.
It is inserted into the small hole 55 of the upper wall 25 of the.

Further, on both sides of the terminal cover 51, skirts 56 are suspended between the cover 23 and the external separator 27 to minimize exposure of the terminal fittings 30.

(Effects) As described above, the present invention interposes the permanent magnet 6 between the first yoke 11 and the second yoke 5, and
, 5 and a permanent magnet 6 are arranged concentrically, and the first . The horizontally moving armature 7 is formed by the left and right side parts 8.9 that face and separate from the left and right armature surfaces of the second yoke 1.5, and the horizontal rod 10 that connects these parts and passes through the coil 11. Since the magnetic flux of the coil 11 does not pass through the permanent magnet 6, the loss rate of the magnetomotive flux of the coil is reduced, resulting in high sensitivity. Minimizes mass and increases operating speed.

Furthermore, in the present invention, the yoke 1.5 and the permanent magnet 6 are arranged concentrically around the armature 7, and the number of parts is reduced.

The positional accuracy of c and d can be improved, balance can be maintained, and there is no variation in operating characteristics depending on the mounting direction.

Further, in the present invention, a horizontally movable armature 7, yokes 1, 5, coils 11, and permanent magnets 6 are housed in a box 12 with an upper opening, and a horizontally movable base 34 is housed in a cover 23 with a lower opening.
, both contact plates 30 and 36 are housed and arranged, and the upper and lower armatures 7
and the movable base 34 are connected by a centrally supported reversing lever 39, and springs 47 and 48 are used to maintain the so-called bistable state in which the armature 7, which is unique to polarized electromagnetic relays, remains in that state after being operated either to the left or to the right. This has the effect of making it possible to implement a horizontal transition type polarized electromagnetic relay.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the polarized electromagnetic relay of the present invention, where Figure 1 is a diagram of the basic principle, Figure 2 is a cross-sectional view of a concrete structure, and Figure 3 is a diagram showing the implementation of a concrete structure. FIG. 2 is a sectional side view, FIG. 4 is a sectional plan view, FIG. 5 is an exploded perspective view, and FIGS. 6 and 7 are views of a conventional example. 1... First yoke, 2.3... Left and right side parts, 4...
horizontal part, 5... second yoke, 6... permanent magnet, 7.
... A matcha, 8, 9... Left and right sides, 10... Horizontal bar, 11... Coil, 12... Box, 13.
...Bottom wall, 15...Reeling frame, 23...Cover, 30.
36... Contact plate, 32.371.・Contact, 34...
Movable platform, 39...Reverse reno (-147°48...Spring agent Patent attorney Kei Nishi Part 1, 2, 3)

Claims (1)

[Claims] A first yoke consisting of left and right side parts whose inner surfaces are polarized surfaces and a cylindrical horizontal part connecting these left and right side parts, and a first yoke that faces the horizontal part with a length shorter than the length between the left and right side parts and has left and right sides. A cylindrical second yoke whose outer surface is a polarized surface, and a cylindrical permanent magnet interposed between the horizontal part of the first yoke and the second yoke with the axis of magnetization perpendicular are concentrically arranged. The armature is of a horizontal transition type, which is disposed on the contact surfaces of the first yoke and the second yoke, and separates from the contact surfaces of the first yoke and the second yoke. The armature is made up of a left and right side part with both inner and outer surfaces as contact surfaces facing the contact surface of the armature, and a horizontal rod connecting these left and right side parts, and a coil into which the horizontal rod of the armature is inserted so as to be horizontally movable; Coil, 1st
．． The second yoke, permanent magnet, and armature are housed in a box with an opening at the top so that the armature moves horizontally against the bottom wall of the box, and a horizontally moving movable table and a plurality of pieces are installed on this movable table. The contact plate of the movable contact, the contact plate of the fixed contact connected to the movable contact, the movable base, and the contact plates of both contacts are housed in a lower opening cover, and the upper and lower ends are aligned with each other around the central axis. A reversing lever for reversing is arranged between the box and the cover, the upper end of the reversing lever is linked to the movable base, the lower end is linked to the armature, and springs are applied to the armature and the movable base in the same direction, respectively. A polarized electromagnetic relay characterized by: