JPS6362854B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic contactor such as a polarized electromagnetic relay, and an object thereof is to provide an electromagnetic contactor that can apply sufficient contact pressure between a movable contact and a fixed contact. do.

An embodiment of the present invention will be explained based on FIGS. 1 to 5. This polarized electromagnetic relay has an electromagnet device in which the armature 7 moves horizontally at the bottom of the casing (box 12, cover 23), a fixed contact 32 at the top of the casings 12, 23, and the armature 7 A movable base 34 is disposed that moves the movable contact 37 attached via the coil spring 36 in the same direction as the fixed contact 32, and the ends of the armature 7 and the movable base 34 in the same direction are disposed. are connected by a centrally supported reversing lever 39, and the casings 12, 2
3 and a protrusion 49 formed on the upper surface of the movable base 34, a coil spring 48 is compressed to bias the movable contact 37 in a direction to separate it from the fixed contact 32, and the movable base 34 The coupling position of the reversing lever 39 is set at approximately the center between the mounting position of the coil spring 36 and the contracted position of the coil spring 48.

This will be explained in detail below with reference to FIGS. 1 to 5.

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. 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 the 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 diagram of the basic principle, and the solid line
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 8, 9 of armature 7 →
Air gaps a, d→left and right pieces 2, 3 of first yoke 1→horizontal piece 4→S pole.

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 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 a repulsive force acts on them. In Figure 1, the armature 7 has horizontally moved to the left as indicated by the arrow Z, and the left side of the armature 7 has moved to the left side 8 of the armature 7.
The external contact surface 8a of the first yoke and the internal contact surface 2a of the left side piece 2 of the first yoke are attracted to each other, and the right side piece 9 of the armature 7
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 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 in the same manner 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 the upper and lower second yokes 5 run parallel to the coil 11 between the left and right side walls 18 and 19, rotated by 90 degrees from FIG. It is fixed at The left and right side walls 18 and 19 are provided with cutouts 20 to facilitate fitting and fixing of the second yoke 5. Also,
The right side wall 19 is provided with a groove 21 for inserting and installing a receiving blade terminal fitting 22 to which the coil 11 is connected.

A cover 23 made of synthetic resin is placed over the upper opening of the box 12 and fixed. 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 an external separate 27 which is divided into a plurality of parts, and an external separate 27 which is the same as this external separate 27. the internal separate 28 of the position and the internal separate 2
8 and a lower opening cavity 29 that 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 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 table 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 coil for contact pressure are installed here. A spring 38 is provided. The contact point 37 of the movable base 34 and the contact point 32 of the cover 23 face each other in the interior chamber 33, and are separated by the movement of the movable base 34.

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

The movable table 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.
Supported by 1.

In the relationship between the reversing lever 39 and the armature 7, a shaft 42 is passed through its lower end, the 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, non-magnetic residual plate 45
intervene. This plate 45 is provided to cut both ends of the magnetic characteristic curve of the permanent magnet 6 and to use the most stable range.

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

Therefore, if the armature 7 moves horizontally to the right as indicated by the arrow Z in FIG.
9 rotates counterclockwise around a central shaft 40, and the movable base 34 horizontally moves to the left as indicated by an 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 is located at the top 4
7a to the left side retaining part 7a of the armature 7,
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 connected to the display column 49 of the movable base 34 and the left side wall 2 of the cover 23.
It is located between 6 and 6.

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 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.

The upper wall 25 of the cover 23 further includes a terminal cover 5.
1 covers. This terminal cover 51 has driver operating holes 53 for terminal screws 52 in number corresponding to the terminal fittings 30 at both ends thereof.

Also, to install it, put out the hook feet 54 on both sides,
It is inserted into the small hole 55 of the upper wall 25 of the cover 23. Furthermore, covers 23 are provided on both sides of the terminal cover 51.
The terminal fitting 30 is located between the external separators 27 of
A skirt 56 hangs down to minimize exposure.

In the polarized electromagnet device of this embodiment, a permanent magnet 6 is interposed between the first yoke 1 and the second yoke 5, and the first and second yokes 1, 5 and the permanent magnet 6 are connected to each other. The left and right pieces 8 and 9 are disposed above and below as a block and separate from each other while facing the left and right polarized surfaces of the upper and lower first and second yokes 1 and 5. horizontal bar 10
Since the horizontal transfer type ammature 7 is formed, the magnetic flux of the coil 11 does not pass through the permanent magnet 6, and therefore the loss rate of the magnetomotive flux of the coil is low, resulting in high sensitivity, and the ammature 7 is a permanent magnet. 6, the mass of the armature is minimized and the operation speed is improved.

Furthermore, yoke 1 is placed above and below centering on Amachia 7.
2 and the permanent magnet 6, vertical and horizontal balance can be maintained, and there is no variation in operating characteristics depending on the mounting direction.

In addition, a horizontally moving type armature 7, yokes 1, 2, coils 11, and permanent magnets 6 are housed in the upper opening box 12, and a horizontally moving type movable base 34, both contact plates 30, 36 is stored 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, and the armature 7, which is unique to polarized electromagnetic relays, is maintained in that state after operation either on the left or right side. Since this so-called bi-stability is achieved by the springs 47 and 48, it has become possible to implement a horizontal shift type polarized electromagnetic relay.

In addition, in this polarized electromagnetic relay, since the connecting position of the movable base 32 and the reversing lever 39 is set at approximately the center position between the mounting position of the coil spring 36 and the contracting position of the coil spring 48, the movable contact 37 is connected to the fixed contact 39. In the state in which the reversing lever 39 is in contact with the movable base 34, the balance of pressure against the movable base 34 is improved, and sufficient contact pressure can be applied between the fixed contact 32 and the movable contact 37. It is possible to stabilize the contact state with.

As described above, the electromagnetic contactor of the present invention has an electromagnetic device in which the armature moves horizontally in the lower part of the casing, a fixed contact in the upper part of the casing, and a fixed contact that moves in the same direction as the armature. A movable base is arranged to move a movable contact attached via a contact spring toward and away from the fixed contact, and ends of the armature and the movable base in the same direction are connected by a centrally supported reversing lever, and the casing and The electromagnetic contactor is provided with a spring compressed between a projection formed on the upper surface of the movable base and which biases the movable contact in a direction to separate the movable contact from the fixed contact, and the connecting position of the movable base and the reversing lever is adjusted. Since the contact spring is set at a substantially central position between the mounting position of the contact spring and the contracted position of the spring, sufficient contact pressure can be applied between the fixed contact and the movable contact, thereby stabilizing the contact state. It has the effect of being able to

[Brief explanation of drawings]

Fig. 1 is a diagram of the basic principle of a polarized electromagnetic relay according to an embodiment of the present invention, Fig. 2 is a sectional view showing its specific structure, Fig. 3 is a cross-sectional side view of Fig. 2, and Fig. 4 is a cross-sectional view showing the specific structure thereof. 2 is a sectional plan view, and FIG. 5 is an exploded perspective view of FIG. 2. 7... Amateur, 12... Box, 23...
Cover, 32...Fixed contact, 34...Movable base, 3
6... Coil spring (contact spring), 37... Movable contact, 39... Reversing lever, 48... Coil spring,
49... Protrusion.

Claims (1)

[Claims] 1. An electromagnetic device in which an armature moves horizontally is arranged at the bottom of the casing, a fixed contact is provided at the upper part of the casing, and the movable contact attached via a contact spring is fixed by moving in the same direction as the armature. arranging a movable base that moves toward and away from the contact, and connecting ends of the armature and the movable base in the same direction with a centrally supported reversing lever;
The electromagnetic contactor includes a spring compressed between the casing and a protrusion formed on the upper surface of the movable base to bias the movable contact in a direction to separate the movable contact from the fixed contact, the movable base and the reversing lever An electromagnetic contactor characterized in that a connection position of the contact spring is set at a substantially central position between a mounting position of the contact spring and a contracting position of the spring.