JP2001345209A - Electromagnet driving device and electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnet driving device, by which a range between excitation suction force and non-excitation suction force can be widened by bringing suction force in case of non-excitation and excitation to an asymmetric state and matching with spring-load characteristics is adjusted easily even when the driving device is used as a driving device for an apparatus having asymme tric spring load, and an electromagnetic relay. SOLUTION: A permanent magnet 24 is erected at a position deviated to one side from the central position of the central piece 20c of a U-shaped core 20. A protrusion 54 as a fulcrum is formed at a position deviated from a central position in an armature 50 so that the fulcrum is positioned to the upper end face of the permanent magnet 24. A coil 41 is installed to a pole piece 20b of the core 20 nearer to the central position in the coil 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet driving device using permanent magnets and an electromagnetic relay.

[0002]

2. Description of the Related Art Conventionally, there is an electromagnet drive device used for a bistable electromagnetic relay having a structure as shown in FIG. In FIG. 31 (a), a permanent magnet 2 is set upright at the center of a central piece 1c of a U-shaped iron core 1 so as to be in contact with magnetic pole surfaces of magnetic pole pieces 1a and 1b formed on both sides of the iron core 1. Pole 3
Of the permanent magnet 2 and the armature 3
A fulcrum composed of a projection 5 provided on the lower surface of the center of the armature is arranged so that the armature 3 can move seesaw freely. The armature 3 is provided with contact springs 4a and 4b each having a free end extending in both end directions. 3, the movable contacts 6a, 6b on the lower surfaces of the front ends of the contact springs 4a, 4b are opposed to the fixed contacts 7a, 7b, and one of the contact portions is turned on by the seesaw operation of the armature 3, and the other contact portion is turned on. 2a and 2b type electromagnetic relays for turning off the power supply. In this case, the coil for exciting is mounted, for example, at the center of the center piece 1c of the iron core 1.

The operating state of the armature 3 is maintained by the magnetic poles of the permanent magnet 2 even when the exciting current to the coil is turned off. When the armature 3 is reversed, the operating state is such that the attractive force of the attracting side permanent magnet 2 is canceled. By the return force of the hinge spring and the suction force acting on the opposite end of the armature 3, the armature 3 is inverted around the fulcrum, the turned-on contact is turned off, and the turned-off contact is turned off. It is designed to be turned on.

In this electromagnetic relay, as shown in FIG. 31 (b), the spring load (X) is symmetric, and the attractive force characteristic (I) of the permanent magnet 2 when not excited is symmetric. The suction characteristic (II) and the reversing operation suction characteristic (III) are symmetric.

[0005] By the way, 2a
When a (1a) type electromagnetic relay is configured, FIG.
The contact spring 4a is provided on only one side as shown in FIG.

Accordingly, the spring load characteristic (X) is shown in FIG.
As shown in FIG. In this case, when the exciting current is supplied to the coil to maintain the ON operation state, the sensing voltage is
In the case of a self-holding type using the magnetic force of the permanent magnet 2, the set voltage (the voltage at which the permanent magnet 2 is turned on) increases.

[0007]

In order to solve the problem of the example shown in FIG. 14, a contact spring 4b as shown in FIG.
When the coil 8 is mounted on the magnetic pole piece 1b on the side of FIG.
As shown in the figure, the excitation attraction force on the coil mounting side increases, and the width of the attraction force expands with respect to the attraction force at the time of non-excitation.
Since the attraction force characteristic during non-excitation remains symmetric, the problem that it is difficult to match with an asymmetric spring load is not solved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to demagnetize the non-excitation and the attraction during excitation so that the width between the excitation attraction and the non-excitation attraction is reduced. To provide an electromagnet drive device that can easily match the spring load characteristics even when used as a drive device for a device having an asymmetric spring load. An object of the present invention is to provide an electromagnetic relay capable of exhibiting stable performance by matching with a spring load.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a substantially U-shaped iron core having parallel magnetic pole pieces on both sides and at least one coil mounted on the iron core are provided. And an armature having both ends freely movable around a fulcrum provided between both ends thereof and a magnetic pole face at both ends of the leg pieces on both ends of the iron core, and one end of the armature and an iron core corresponding to this one end. A permanent magnet that forms a closed magnetic circuit with the iron core via the tip pole face of the pole piece and attracts one end of the armature to the tip pole face of the corresponding leg of the iron core, and applies the magnetic force of the permanent magnet to the coil. In the electromagnet drive device in which the armature can be reversed by passing the exciting current in the direction of erasing, the fulcrum of the permanent magnet and the armature is provided at a position deviated to one side from the center between the magnetic pole pieces on both sides of the iron core. It is characterized by.

According to a second aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles having opposite ends is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are disposed on the horizontal piece of the iron core, and the fulcrum of the armature is disposed at the other end.

According to a third aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized at different magnetic poles at both ends is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is arranged on a line passing through the center between the magnetic pole pieces on both sides of the iron core. And

According to a fourth aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles whose both ends are different from each other is used as the permanent magnet, and one end thereof is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is positioned at the center position between the magnetic pole pieces on both sides of the iron core and the arrangement position of the permanent magnet. And is disposed between the two.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles having opposite ends is used as the permanent magnet, and one end of the permanent magnet is arranged so that both ends are parallel to the magnetic pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is placed on the magnetic pole piece on the side far from the arrangement position of the permanent magnet, And a center position between the pole pieces.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized at different magnetic poles at both ends is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is set at the position where the permanent magnet is arranged and the magnetic pole of the iron core close to the arrangement position. It is characterized by being arranged between the pieces.

According to a seventh aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized to magnetic poles having both ends different from each other is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Is disposed on the horizontal piece of the iron core corresponding to the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is shifted from the center position between the two magnetic pole pieces of the iron core to one magnetic pole piece side. It is characterized by being arranged.

According to an eighth aspect of the present invention, in the first aspect of the invention, both ends of the permanent magnet are magnetized to have the same polarity,
Using a permanent magnet magnetized to a different polarity at an intermediate portion deviated from the center in both end directions, both ends of the permanent magnet are bridged so as to face the inner surfaces of the front ends of the pole pieces on both sides of the iron core. The fulcrum of the armature is arranged corresponding to the magnetized position of the intermediate part of the permanent magnet.

According to a ninth aspect of the present invention, in the first aspect of the present invention, both ends of the permanent magnet are magnetized to have the same polarity,
Using a permanent magnet magnetized to a different polarity at an intermediate portion deviated from the center in both end directions, both ends of the permanent magnet are bridged so as to face the inner surfaces of the front ends of the pole pieces on both sides of the iron core. The fulcrum of the armature is arranged at a position corresponding to a line passing through the center between the pole pieces on both sides of the iron core.

According to a tenth aspect of the present invention, in the first aspect of the present invention, the permanent magnet is formed by using a permanent magnet whose both ends are magnetized to the same polarity and whose intermediate portion deviated from the center is magnetized to a different polarity. The two ends of the permanent magnet are bridged so as to be in contact with the inner surfaces of the tips of the pole pieces on both sides of the core, and the fulcrum of the armature is positioned at the center between the pole pieces on both sides of the core and the permanent magnet. And a magnetizing position of the intermediate portion of the above.

According to an eleventh aspect of the present invention, in the first aspect of the present invention, as the permanent magnet, a permanent magnet whose both ends are magnetized to the same polarity and whose intermediate portion deviated from the center in both end directions is magnetized to a different polarity. The two ends of the permanent magnet are bridged so as to be in contact with the inner surfaces of the tips of the pole pieces on both sides of the iron core, and the fulcrum of the armature is positioned at the center between the pole pieces on both sides of the iron core, The permanent magnet is arranged between the permanent magnet and a magnetic pole piece far from the magnetized position.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, as the permanent magnet, a permanent magnet whose both ends are magnetized to the same polarity and whose intermediate portion deviated from the center in both end directions is magnetized to a different polarity. The two ends of the permanent magnet are bridged so as to be in contact with the inner surfaces of the tips of the pole pieces on both sides of the iron core, and the fulcrum of the armature is magnetized at the intermediate position of the permanent magnet. It is characterized by being arranged between the pole piece of the iron core on the side closer to the magnetized position.

According to a thirteenth aspect of the present invention, in the first aspect of the present invention, the permanent magnet is formed by using a permanent magnet whose both ends are magnetized to have the same polarity and whose center portions in both end directions are magnetized to different polarities. Both ends of the magnet are bridged so as to be in contact with the inner surfaces of the tips of the pole pieces on both sides of the iron core, and the fulcrum of the armature is placed on one pole piece side from the center position between the pole pieces on both sides of the core. It is characterized by being arranged at a deviated position.

According to a fourteenth aspect, in the first aspect, the permanent magnet is integrally attached so as to be parallel to the armature.

According to a fifteenth aspect of the present invention, in accordance with the fourteenth aspect of the present invention, the permanent magnet is fixed to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. And the fulcrum of the armature is arranged on a line passing through the center between the pole pieces on both sides of the iron core.

In a sixteenth aspect of the present invention, in the fourteenth aspect of the present invention, the permanent magnet is fixed to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. And the fulcrum of the armature is disposed at a position deviated between a line passing through the center between the pole pieces on both sides of the iron core and the center position of the permanent magnet.

According to a seventeenth aspect of the present invention, in accordance with the fourteenth aspect of the present invention, the permanent magnet is positioned such that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. And the fulcrum of the armature is disposed between the pole piece of the iron core far from the center position of the permanent magnet and the center position between both pole pieces.

According to an eighteenth aspect of the present invention, in accordance with the fourteenth aspect of the present invention, the permanent magnet is fixed to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. And the fulcrum of the armature is disposed at a position corresponding to a position between the center position of the permanent magnet and the pole piece of the iron core closer to the center position.

According to a nineteenth aspect, in the fourteenth aspect of the present invention, the permanent magnet is positioned such that the center of the permanent magnet is located on a line passing through the center between the pole pieces on both sides of the iron core. In addition to being attached to the armature, the fulcrum of the armature is arranged at a position deviated to one side of one magnetic pole of the iron core.

According to the twentieth aspect of the present invention, the first to sixth aspects are provided.
The invention according to any one of Items 8 to 12, 1 to 18, wherein the number of the coils is one.

According to a twenty-first aspect of the present invention, in the twentieth aspect, the coil is mounted at an iron core position from a position where the fulcrum of the armature is displaced to a position including the pole piece on the center direction side. It is characterized by.

According to the twenty-second aspect, the first to nineteenth aspects are provided.
The invention is characterized in that the coils are mounted at iron core positions from a position where the fulcrum of the armature is displaced to a position including the pole pieces on both sides.

According to the twenty-third aspect of the present invention, a substantially U-shaped iron core having parallel magnetic pole pieces on both sides, at least one coil mounted on the iron core, and a seesaw movable about a fulcrum provided between both ends. A closed magnetic path is formed by an armature having both ends opposed to the pole faces of the tip ends of the legs on both sides of the core, and one end of the armature and the iron core via the tip pole face of the pole piece of the core corresponding to this end. A permanent magnet that is configured to attract one end of the armature to the tip magnetic pole surface of the corresponding leg of the iron core to form an electromagnet block and dispose the electromagnet block on the body;
The above-mentioned armature is arranged in parallel with the armature, one end is attached to the armature, and a movable contact provided at the other end extending in the end direction of the armature is fixed to the body. A contact spring that is opposed to the contact and that opens and closes the movable contact with respect to the fixed contact in accordance with a seesaw operation of the armature, wherein an exciting current is supplied to the coil in a direction to cancel the magnetic force of the permanent magnet. In the electromagnetic relay capable of reversing the armature, from the center between the pole pieces on both sides of the iron core,
A fulcrum of the permanent magnet and the armature is provided at a position deviated in a direction opposite to an end direction of the contact spring.

According to a twenty-fourth aspect of the present invention, in the twenty-third aspect of the present invention, a permanent magnet magnetized on magnetic poles whose both ends are different from each other is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core, and the fulcrum of the armature is arranged at the other end.

According to a twenty-fifth aspect of the present invention, in the twenty-third aspect of the present invention, a permanent magnet magnetized on magnetic poles having opposite ends is used as the permanent magnet, and one end of each end is parallel to the pole piece of the iron core. Are arranged at positions deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is arranged on a line passing through the center between the magnetic pole pieces.

According to a twenty-sixth aspect, in the twenty-third aspect, the permanent magnet is integrally attached so as to be parallel to the armature.

According to the twenty-seventh aspect of the present invention,
The invention according to any one of the sixth to sixth aspects, wherein the number of the coils is one.

According to the twenty-eighth aspect of the present invention,
6. The invention according to claim 6, wherein the coil is mounted at an iron core position from a position where the fulcrum of the armature is displaced to a position including the pole piece on the center direction side.

In the twenty-ninth aspect of the present invention,
6. The invention according to claim 6, wherein the coils are mounted at iron core positions from a position where the fulcrum of the armature is displaced to a position including the pole pieces on both sides.

According to the thirty-third aspect, the twenty-third aspect and the second aspect
The invention according to any one of the nine aspects, further comprising a hinge spring having one end fixed to the armature and the other end fixed to the body from a direction opposite to the other end of the contact spring.

According to a thirty-first aspect of the present invention, in the thirty-third aspect, the hinge spring is substantially U-shaped, and at least the plate surfaces of both side pieces are in the same direction as the plate surface of the contact spring. Are fixed to the armature, the other side piece is arranged side by side with the armature, and the tip of the side piece is fixed to the body.

According to a thirty-second aspect of the present invention, in the thirty-first aspect, the center piece of the hinge spring is bent so that the plate surface is perpendicular to the plate surfaces of both side pieces.

According to a thirty-third aspect of the present invention, in any one of the thirty-third to thirty-second aspects, the position where the hinge spring is fixed on the body is near the fulcrum position of the armature.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

(Embodiment 1) In this embodiment, as shown in FIG. 1A, the electromagnet driving device is deviated to one side (the magnetic pole piece 20a side) from the center position of the central piece 20c of the U-shaped iron core 20. At the position, for example, the permanent magnet 24 magnetized with the lower end at the S-pole (or N-pole) and the upper end at the N-pole (S-pole) is made to stand upright and deviated from the center position corresponding to the upper end surface of the permanent magnet 24. Projection 5 which is a fulcrum of the seesaw operation of the armature 50
For example, a coil 41 is attached to the pole piece 20b of the iron core 20 closer to the center position.

Next, the suction force characteristic of this embodiment will be described.

First, in FIG. 2A, when it is assumed that the armature 50 has an attractive force of F1 at a portion a in the drawing, a force Fα that moves the armature 50 away from the pole piece 20b of the iron core 20 at the portion a is represented by the following equation. It is obtained by (1).

Fα = F1 (1) Next, as shown in FIG. 2B, the armature 50 is attached to the pole piece 20a.
In the state where the end portion is attracted, the force Fβ that causes the opposite end portion to move closer to the pole piece 20b is as follows.

Here, from the position of the fulcrum of the armature 50, the pole piece 2
The distance to the end of the 0b side is l _1, the distance to the end of the pole piece 20a side is l _2, when the suction force of the suction side and F2, Fβ is determined by the following equation (2).

Fβ × l₁= F2 × l_Two  Fβ = F2 × l_Two/ L₁ (2) Here, the magnetic resistance in the iron core 20 and the armature 50 is determined by the magnetic force in the air gap.
If it is considered negligible compared to air resistance,
The attractive forces F1 and F2 are considered to be equivalent.

Therefore, from the expressions (1) and (2), l ₁ <l ₂
In this case, Fα> Fβ, and a left-right asymmetric attraction force as shown in FIG. 3 is obtained at the time of non-excitation.

On the other hand, as described above, with the permanent magnet 24 disposed at the center position as shown in FIG.
When 1 is mounted on the pole piece 20b of one of the iron cores 20, the characteristics of the attraction force (attraction force of the permanent magnet 24) at the time of non-excitation are as shown in (I) of FIG. On the non-mounting side as well, it is symmetrical, but the respective attractive forces at the time of operation attraction by excitation of the coil 41 and at the time of return attraction are (II),
As shown by the curve (III), the width increases on the coil mounting side.

Therefore, when the position of the permanent magnet 24 is also deviated as in the present embodiment, the permanent magnet 2 is displaced as shown in FIG.
4 also becomes asymmetric, and as a result, a suction force characteristic as shown in FIG. 1B is obtained. Note that (I) represents the time of non-excitation,
(II) and (III) show the characteristics of the suction force at the time of operation suction and at the time of return suction, respectively.

Thus, according to the configuration of this embodiment, the attraction force characteristics are asymmetric in both the non-excitation state and the excitation state, so that an effective electromagnet driving device can be realized when an unbalanced load is applied. (Embodiment 2) In this embodiment, both ends are magnetized to the same magnetic pole as the permanent magnet 24 as shown in FIG. The both ends of the permanent magnet 24 are fixed to the two pole pieces 20 of the iron core 20 using permanent magnets magnetized at magnetic poles having different positions.
The bridges are arranged so as to be in contact with the inner side surfaces of the front portions of a and 20b, and the projections 54 constituting the fulcrum of the armature 50 are arranged at magnetic pole positions deviated from the center.

In this embodiment, the same suction force characteristics as those of the first embodiment can be obtained. (Embodiment 3) In the present embodiment, as shown in FIG. 5, for example, permanent magnets 24 magnetized with different polarities at both ends are connected to an armature 50.
The center position Y is shifted in accordance with the position of the fulcrum. (Embodiment 4) This embodiment constitutes a 2a-type electromagnetic relay constituted by using an electromagnet driving device as shown in Embodiment 1, and as shown in FIG. The contact spring 52 is held by the armature 50 so as to be parallel to the position of the armature 10 in the direction in which the distance from the position to the end is longer, and the movable contact 5 provided on the lower surface of the distal end of the contact spring 52
A fixed contact 21 is provided so as to face 2a;
The spring load is asymmetric. FIG. 6B shows the attraction force characteristic of the present embodiment, which is in principle as described in the first embodiment. In the drawing, (I) shows the attraction force characteristic when no excitation is performed, and (II) Indicates a suction force characteristic during a suction operation, and (III) indicates a suction force characteristic during a return operation. Therefore, the asymmetrical suction force characteristic facilitates the matching with the asymmetric spring load.

This embodiment will be described in more detail with reference to FIGS.

As shown in FIGS. 7 and 8, the electromagnetic relay of the present embodiment has a terminal plate 22 provided with an iron core 20 and a fixed contact 21.
A contact is made with a body block Ba composed of a body 23 made of a synthetic resin molded product formed by inserting a terminal plate 27 provided with a joint surface 27a to which one end of a hinge spring 26 provided on the contact block Bb is fixed. Pole block B
b, the coil block Bc, and the permanent magnet 24 are assembled, and a box-shaped case 25 made of synthetic resin and opened at the lower surface is attached to the body block Ba.

The iron core 20 is formed by punching out a magnetic iron plate into a U shape, and is inserted and fixed to the body 23 when the body 23 is formed.
0b is projected above the body 23. The insert position of the iron core 20 is on a line passing through the center in the short direction of the body 23 and is shifted to one side from the center point in the long direction. One magnetic pole piece 20a is closer to one edge of the body 23. The other pole piece 20b is located closer to the center than the other end of the body 23. Then, along the inside of one of the pole pieces 20a,
Are integrally formed to protrude. This square tube part 28 is in the center,
Center piece 20c of iron core 20 with lower end inserted
A hole 29 having a square cross section is provided in the vertical direction to a position on the upper surface of the magnetic pole piece 20a and deviated toward the one pole piece 20a from the center position between the pole pieces 20a and 20b on both sides.

A prismatic permanent magnet 24 having substantially the same cross-sectional shape is inserted into the hole 29 by press-fitting or inserting from above. The permanent magnet 24 has upper and lower ends magnetized to different magnetic poles. The lower pole face is attracted to the upper surface of the central piece 20 c of the iron core 20, and the upper pole face is higher than the upper end face of the square tube 28. At the same height as the pole faces of the pole pieces 20a and 20b of the iron core 20. The permanent magnet 24 may be magnetized in advance, but may be unmagnetized when assembled into the body 23 and then magnetized to become a permanent magnet.

Side walls 30, 30 are integrally formed on both sides of the body 23 so as to extend in parallel with the iron core 20, and a terminal partially inserted into the side wall 30 is formed on an outer surface of each side wall 30. Grooves 31 and 32 are formed for leading out the terminals 22 and 27 and leading the terminals 33 and 34 provided at the front ends of the respective terminal plates 26 and 27 to the lower surface side of the body 23. The fixed contact 2 provided at one end of the terminal plate 22 is provided on the upper surface of the side wall 30 parallel to the pole piece 20b.
1, and a joint surface 27a provided at one end of the terminal plate 27 is exposed on the upper surface near the center of the side wall 30.

At the end of the body 23 on the side of the pole piece 20b, a low-height standing wall 35 formed so that one end reaches the end face of the side walls 30, 30 is integrally provided upright. Is a coil bobbin 37 of a coil block Bb to be described later.
A notch 36 for fitting the end 38a of the flange 38 is formed.

The coil block Bb has, as shown in FIG. 9, the above-mentioned coil bobbin 37 having a center through hole 39 which is substantially the same as the cross section of the pole piece 20b and has a central through hole 39 through which the pole piece 20b is inserted. And a coil 41 wound around the body between the flanges 38 and 40 of
Coil terminals 42, 42 to which a coil 41 is connected protrude from both side surfaces of the lower flange 38 near the end 38a. The coil terminals 42 are bent in an inverted L-shape and extend downward. On both side surfaces of the flange portion 38, locking projections 43, 43 for fixing an insulating case 44 to be attached to the coil block Bc are integrally formed so as to protrude.

The opening of the center through hole 39 of the upper flange portion 40 is surrounded by ribs on three sides other than the portion where the end of the armature 50 of the armature block Bb described later faces. The rib 48 is formed so as to be higher than the tip position of the pole piece 20b projecting upward from the opening of the center through hole 39.

The insulating case 44 is made of a synthetic resin molded product, has a box shape with an opening on the lower surface, and has the coil bobbin 37 on the ceiling surface.
An opening window 45 for projecting the tip end of the pole piece 20b projecting from the center through hole 39 and the rib 48 to the outside is provided. When the coil block Bc is attached to the lower end edges of a pair of opposite side walls, An elastic protruding piece 47 having a locking hole 46 for locking the locking projection 43 from the inside with a lower end riding on the tapered surface of the locking projection 43 formed on both sides of the flange portion 38 of the coil bobbin 37 is integrally provided. The locking projection 43 and the locking hole 46 allow the insulating case 44 to be attached and fixed to the coil block Bb with one touch.

As shown in FIG. 7, when assembling the coil block Bb with the insulating case 44 attached to the base block Ba, the tip of the pole piece 20b is inserted through the lower opening of the center through hole 39 of the coil bobbin 37 and the coil Connect the tip of the terminal 42 to the body 2 near the end of the side wall 30, 30.
3 is inserted from above into a coil terminal hole 49 opened on the upper surface on both sides of the body 3 so that the flange 38 of the coil bobbin 37 is
And the end 38a of the flange 38 is
In the notch 36 of FIG. At this time, the end surface of the end portion 38a is substantially flush with the outer surface of the upright wall 35.

The armature block Bb is provided between the armature 50 made of a magnetic material and the two ends of the armature 50 at positions where the center of the armature 50 is inserted and one end of the armature 50 is deviated from the center of the armature 50. A T-shaped synthetic resin molded body 53 having arms 51, 51 protruding in the direction;
The contact spring 5 is inserted into each arm body 51 and protrudes forward from the surface of each arm body 51 facing the center of the armature 50.
2, 52, and U-shaped hinge springs 26, 26 extending from the rear ends of the contact springs 52, 52 and projecting rearward from the surface of the arm body 51 opposite to the surface on which the contact spring 52 projects. Is done.

The length of one side piece of the hinge spring 26 protruding from the arm body 51 is made slightly shorter than the length of the portion of the armature 50 protruding from the synthetic resin molded body 53 and parallel thereto, and is folded back from the center piece. The length of the other side piece parallel to the armature 50 is set to a length whose tip substantially corresponds to the center of the armature 50 in the longitudinal direction.

The tip of each contact spring 52 is bifurcated, and a movable contact is provided on each lower surface to form a so-called twin contact.

The armature 50 is dimensioned in the longitudinal direction of the iron core 20 so that the lower surface at both ends of the armature 50 can be opposed to the magnetic pole surfaces of the pole pieces 20a and 20b when the armature 50 is disposed above the iron core 20. The protrusions 54 are formed slightly longer than the dimensions, and protrude at lower surface positions that are offset from the center position and that are opposed to the upper end surfaces of the permanent magnets 24 mounted between the pole pieces 50a and 50b. Permanent magnet 24
Is slidably mounted on the upper end surface of the device, and constitutes a fulcrum of the seesaw operation.

The armature block B configured as described above
b is assembled to the base block Ba after the coil block Bc is assembled as described above, and the projection 54 is placed on the upper end surface of the permanent magnet 24, and the outer side pieces of the hinge springs 26, 26 on both sides are mounted. The distal end portion is fixed by welding to the joining surface 27a of the terminal plate 27 exposed on the substantially central upper surfaces of the side walls 30, 30 of the base block Ba.

As a result, the movable contacts on the lower surfaces of the tip ends of the contact springs 52 on both sides are respectively opposed to the fixed contacts 21, and the lower surfaces of both ends of the armature 50 are fixed to the magnetic pole pieces 2 of the iron core 20.
0a and 20b are arranged to face the magnetic pole surfaces.

After the coil block Bc and the armature block Bb have been assembled to the body block Ba in this manner,
When the case 25 is attached to the body block Ba, FIG.
As a result, a 2a-type electromagnetic relay shown in (d) is obtained. When the case 25 is attached, the downward step 25a, which is a projection provided on the inner wall surface on the coil block Bc side, connects the end 38a of the flange 38 of the coil bobbin 37 with the body 23 in FIG.
As shown in (c), the coil block Bc including the coil bobbin 37 is securely fixed to the body block Ba. A downward step 25b is also provided on the inner wall surface of the case 25 on the pole piece 20a side, and the downward step 25b rides on the upper surface of the body 23 near the exposed base of the pole piece 20a.

In the electromagnetic relay according to the present embodiment, the end closer to the fulcrum position of the armature 50 by the spring biasing force of the hinge springs 26 and the magnetic force of the permanent magnet 24 is normally used as the magnetic pole of the magnetic pole piece 20a. The movable contacts of the contact springs 52 are separated from the fixed contact 21 by suction. In this case, a closed magnetic circuit is formed by the iron core 20 including the permanent magnet 24, the armature 50, and the pole piece 20a, and the operating state of the armature 50 is maintained.

In this state, the magnetic force of the permanent magnet 24 is canceled on the side of the pole piece 20a of the iron core 20, and the hinge spring 2
Attraction force greater than the spring load of the permanent magnet 24
When an exciting current is applied to the coil 41 via the coil terminals 42 and 42 so as to be generated on the magnetic pole piece 20b side in accordance with the magnetic force of the magnetic pole piece 20b, the armature 50 moves counterclockwise in FIG. When the seesaw is operated, the contact springs 52,
The end on the 52 side is attracted to the pole face of the pole piece 20b. At this time, the contact springs 52, 52
The terminals 33, 3 of the terminal plates 22, 27 are brought into elastic contact with the terminals 1, 21.
Turn on between four. This state is maintained by keeping the exciting current flowing. 8 (b) and 8 (c) show the operation in progress.

When the exciting current is turned off, the restoring force of the hinge springs 26, 26 and the contact springs 52, 52 is greater than the attraction force of the permanent magnet 24 on the pole piece 20b side. It rotates around the fulcrum 54, and further, the magnetic force of the permanent magnet 24 generated on the magnetic pole piece 20a side applies an attractive force to return to the above-described normal state.
As a result, the movable contacts of the contact springs 52, 52 become fixed contacts 2
They are separated from each other and become off. If the return force due to the spring bias is smaller than the attractive force due to the magnetic force of the permanent magnet 24, the operating state of the armature 50 is maintained by the magnetic force of the permanent magnet 24 even when the exciting current is turned off. Can be. Therefore, when returning to the contact OFF state, the coil 41 is returned by supplying an exciting current to the coil 41 in a direction to cancel the magnetic force of the permanent magnet 24.

The self-holding type or the type in which an exciting current is supplied to maintain the ON state of the electromagnetic relay of this embodiment can be selected by appropriately setting the spring load.

When the contacts are opened and closed as described above, consumable powder of the contact material is generated at the contact points, and wear powder is generated from the magnetic pole pieces 20a and 20b of the iron core 20 to which the armature 40 is adsorbed. The ribs 48 prevent the wear powder from scattering, and the consumable powder prevents the magnetic pole pieces 20a and 20b from scattering.
To the magnetic pole surface. Further, the insulation distance between the coil 41 and the pole piece 20b of the iron core 20 is increased to ensure insulation.

In this embodiment, the permanent magnet 24 is inserted into the hole 29 of the rectangular tube portion 28. However, the permanent magnet 24 may be integrated with the body 23 by insert molding as in the case of the iron core 20. In this case, the step of incorporating the permanent magnet 24 into the body block Ba can be omitted, and the pole pieces 20a, 20
Not only the reference dimension between the pole face b and the fixed contact 21 but also the reference dimension between these and the pole face of the permanent magnet 24 can be obtained with high accuracy, and as a result, the stroke of the armature 50 can be stabilized.

Further, in this embodiment, when the spring is adjusted, the center piece of the hinge spring 26 can be adjusted by being biased by a jig or the like. (Embodiment 5) In this embodiment, as shown in FIG. 10, the center piece of the hinge spring 26 is bent so as to be perpendicular to the plate surface of the side piece, and the center piece is gripped from above by a jig during adjustment. Embodiment 4 is different from Embodiment 4 in that spring adjustment can be performed by biasing the central piece in the front-rear direction with respect to the plate surface. The other configuration is the same as the other configuration in FIG. 7, and thus the same reference numerals are given and the description is omitted. (Embodiment 6) In Embodiment 4 or 6 above, the permanent magnet 24 is made to stand up. However, in this embodiment, both ends are magnetized to the same magnetic pole as the permanent magnet 24 as shown in FIG.
Using permanent magnets 24 magnetized to magnetic poles whose positions deviated from the center are different from each other, both ends of the permanent magnet 24 are bridged so as to be in contact with the inner side surfaces of the tips of the magnetic pole pieces 20a and 20b of the iron core 20. , The fulcrum of the armature 50 is arranged at a magnetic pole position deviated from the center.

(Embodiment 7) In the present embodiment, in the case of FIG. 12, the permanent magnet 24 is provided on the armature 50 side, and the center magnetized position is deviated according to the position of the fulcrum.

In each of the above embodiments, both the electromagnet driving device and the electromagnetic relay are provided with one coil 41, but the coils may be mounted on both magnetic pole pieces 20a, 20b of the iron core 20, respectively. In this case, the width of the suction force on both sides of the fulcrum of the armature 50 can be increased. (Eighth Embodiment) In the first embodiment, the position of the permanent magnet 24 and the position of the fulcrum 54 of the armature 50 coincide with each other, but in the present embodiment, as shown in FIG.
4 is arranged on the center line X between the magnetic pole pieces 20a, 20a of the iron core 20. When one coil is mounted on the iron core 20, the position of the coil 41 is set on the magnetic pole piece 20b or the horizontal piece 20c between the magnetic pole piece 20b and the arrangement position of the permanent magnet 24 as shown in the figure. You only need to attach it.

In the structure of this embodiment, the suction force curve is shown in FIG.
4 is obtained as shown by the solid line.
The attraction force on the 0b (coil mounting) side is the same as that in the first embodiment, but the attraction force on the pole piece 20a side can be made larger than that in the first embodiment (shown by a broken line). In other words, when an electromagnetic relay as shown in FIG. 6 is configured using this embodiment, the normally open (pole piece 20b) side attracts the same force, and the normally closed (magnetic pole piece 20a) side becomes large. An electromagnetic relay having a magnetic circuit having an attraction characteristic and capable of easily matching an asymmetric spring load can be realized.

(Embodiment 9) In this embodiment, the arrangement of the permanent magnets 24 is the same as that of the second embodiment, and the attraction force is increased as in the eighth embodiment.

That is, as shown in FIG. 15, both ends of the permanent magnet 50 are magnetized to the same polarity (S pole in the figure), and the intermediate portion deviated from the center of both ends is magnetized to a different polarity (N pole). , The two ends of the permanent magnet 50 are bridged so as to be in contact with the inner surfaces of the tips of the pole pieces 20a and 20b on both sides of the iron core 20, and the fulcrum 54 of the armature 50 is It is arranged on the center line X between the pole pieces 20a and 20b. When one coil is mounted on the iron core 20, it may be mounted on the pole piece 20b or the horizontal piece 20c.

Thus, in the case of the present embodiment, a suction curve similar to that of the eighth embodiment is obtained. When the electromagnetic relay is configured using the contact structure as shown in FIG. 6 with this embodiment, the electromagnetic relay is normally closed (the magnetic pole piece 20b) while the suction force on the normally open (magnetic pole piece 20b) side remains unchanged.
a) It is possible to realize an electromagnetic relay having a magnetic circuit having a larger side and having an unbalanced attraction characteristic and having an asymmetric spring load that can be easily matched.

(Embodiment 10) This embodiment relates to Embodiment 3.
In this embodiment, the permanent magnet 24 is attached to the armature 50 in the same manner as in the above, and the attraction force is increased as in the eighth embodiment.

That is, as the permanent magnet 24, a permanent magnet whose both ends are magnetized to different polarities, for example, is used, and both ends of the permanent magnet 24 are parallel to both ends of the armature, and
Of the magnetic pole pieces 20a, 20b on both sides of the iron core 20
The permanent magnet 24 is attached to the armature 50 so as to be deviated from the position of the center line X between the magnetic pole pieces 20a and 20b on both sides of the iron core 20. It is arranged on X. When one coil is mounted on the iron core 20, the magnetic pole piece 20b or the horizontal piece 20c
It should be attached to.

Thus, in the case of the present embodiment, a suction curve similar to that of the ninth embodiment is obtained. When the electromagnetic relay is configured using the contact structure as shown in FIG. 6 with this embodiment, the electromagnetic relay is normally closed (the magnetic pole piece 20b) while the suction force on the normally open (magnetic pole piece 20b) side remains unchanged.
It is possible to realize an electromagnetic relay having a magnetic circuit having an unbalanced attractive force characteristic in which the attractive force on the side a) is increased, and which can easily match an asymmetric spring load.

(Embodiment 11) In Embodiment 8, the fulcrum 54 of the armature 50 is arranged on the center line X between the pole pieces 20a and 20b of the iron core 20, but this embodiment is as shown in FIG. The difference is that the position of the fulcrum 54 is closer to the center line X than the position of the permanent magnet 24 on the permanent magnet 24 side from the center line X.

That is, in the eighth embodiment, the magnetic circuit is configured so that the attraction force on the pole piece 20a side is larger than that in the first embodiment, but in the present embodiment, as shown by a solid line in FIG. 1 (indicated by a broken line), the attraction force on the pole piece 20b (coil mounting) side is reduced, and the attraction force on the pole piece 20a side is further increased.

When the electromagnetic relay is constructed by using the contact structure shown in FIG. 6 with this embodiment, the electromagnetic relay is normally open (pole piece 20b).
Normally closed while the suction force on the side becomes smaller (pole piece 20a)
It is possible to realize an electromagnetic relay equipped with a magnetic circuit having an unbalanced attractive characteristic in which the attracting force on the side is increased, and particularly in the design of a single type (current holding type) electromagnetic relay, it is easy to match an asymmetric spring load. Become.

(Embodiment 12) In Embodiment 9 described above, the fulcrum 54 of the armature 50 is arranged on the center line X between the pole pieces 20a and 20b of the iron core 20, but this embodiment is as shown in FIG. The point of difference is that the position of the fulcrum 54 is closer to the center line X than the center position on the magnetized position (N pole) side of the intermediate portion of the permanent magnet 24 from the center line X.

That is, in the ninth embodiment, the magnetic circuit is configured so that the attraction force on the pole piece 20a side is larger than that in the first embodiment. However, in the present embodiment, the first embodiment is similar to the eleventh embodiment. In comparison, the attraction force on the pole piece 20b side is reduced, and the attraction force on the pole piece 20a side is further increased.

When the electromagnetic relay is constructed using the contact structure shown in FIG. 6 with this embodiment, the electromagnetic relay is normally open (pole piece 20b).
Normally closed while the suction force on the side becomes smaller (pole piece 20a)
It is possible to realize an electromagnetic relay having a magnetic circuit with an unbalanced attraction characteristic with an increased attraction force on the side, and particularly in the design of a single type (current holding type) electromagnetic relay, it is easy to match an asymmetric spring load. .

(Thirteenth Embodiment) In the tenth embodiment, the fulcrum 54 of the armature 50 is arranged on the center line X between the pole pieces 20a and 20b of the iron core 20, but this embodiment is as shown in FIG. The position of the fulcrum 54 from the center line X
Are different from each other in that the center position Y is closer to the center line X than the center position Y.

That is, in the tenth embodiment, the magnetic circuit is configured so that the attraction force on the pole piece 20a side is larger than that in the first embodiment, but in the present embodiment, the first embodiment is similar to the eleventh embodiment. In comparison, the attraction force on the pole piece 20b side is reduced, and the attraction force on the pole piece 20a side is further increased.

When the electromagnetic relay is constructed by using the contact structure as shown in FIG. 6 with the present embodiment, the electromagnetic relay is normally opened (pole piece 20b).
Normally closed while the suction force on the side becomes smaller (pole piece 20a)
It is possible to realize an electromagnetic relay having a magnetic circuit with an unbalanced attraction characteristic with an increased attraction force on the side, and particularly in the design of a single type (current holding type) electromagnetic relay, it is easy to match an asymmetric spring load. .

(Embodiment 14) In Embodiment 11, the fulcrum 54 of the armature 50 is arranged so as to be deviated in the direction of the position of the permanent magnet 24. In this embodiment, as shown in FIG. The difference is that the fulcrum 54 is arranged at a position deviated in the direction opposite to the position of the permanent magnet 24 with respect to the center line X between the pieces 20a and 20b.

That is, in the present embodiment, as shown by the solid line in FIG. 22, a greater unbalance of the suction force characteristic is achieved as compared with the first embodiment (shown by the broken line).

When the electromagnetic relay is constructed by using the contact structure as shown in FIG. 6 with the present embodiment, the electromagnetic relay is normally open (pole piece 20b).
The suction force of the magnetic pole piece is further reduced, and
a) An electromagnetic relay having a magnetic circuit having an unbalanced attractive characteristic, in which the attractive force on the side is further increased, can be realized, and particularly in the design of a single type (current holding type) electromagnetic relay, matching of the asymmetric spring load. Is easy to take.

(Embodiment 15) In Embodiment 12, the fulcrum 54 of the armature 50 is moved to the magnetic pole (N
However, in this embodiment, as shown in FIG. 23, the magnet is biased in the direction opposite to the magnetized position of the intermediate portion of the permanent magnet 24 with respect to the center line X between the magnetic poles 20b of the iron core 20, as shown in FIG. This is different in that they are arranged at different positions.

That is, in the present embodiment, the attraction force on the pole piece 20a side is further increased as compared with the twelfth embodiment, whereas the present embodiment is similar to the twelfth embodiment as compared with the twelfth embodiment. Further, the imbalance of the suction force characteristics is achieved.

When the electromagnetic relay is constructed using the contact structure shown in FIG. 6 with the present embodiment, the electromagnetic relay is normally open (pole piece 20b).
The suction force of the magnetic pole piece is further reduced, and
a) An electromagnetic relay having a magnetic circuit having an unbalanced attractive characteristic, in which the attractive force on the side is further increased, can be realized, and particularly in the design of a single type (current holding type) electromagnetic relay, matching of the asymmetric spring load. Is easy to take.

(Embodiment 16) In Embodiment 13, the fulcrum 54 of the armature 50 is deviated toward the center Y of the permanent magnet 24. In this embodiment, as shown in FIG.
The difference is that the permanent magnet 24 is disposed at a position deviated in the opposite direction to the center position Y of the permanent magnet 24 with respect to the center line X between the 0 magnetic poles 20b.

That is, in the present embodiment, as in the fourteenth embodiment, the suction force characteristic is further unbalanced as compared with the twelfth embodiment.

When the electromagnetic relay is constructed using the contact structure shown in FIG. 6 with this embodiment, the electromagnetic relay is normally open (pole piece 20b).
The suction force of the magnetic pole piece is further reduced, and
a) An electromagnetic relay having a magnetic circuit having an unbalanced attractive characteristic, in which the attractive force on the side is further increased, can be realized, and particularly in the design of a single type (current holding type) electromagnetic relay, matching of the asymmetric spring load. Is easy to take.

(Embodiment 17) In Embodiment 11, the position of the permanent magnet 24 in which the fulcrum 54 of the armature 50 is biased and
The core 20 is arranged between the pole pieces 20a and 20b on both sides of the core 20 and the center line X. In this embodiment, FIG.
As shown in (b), the position of the permanent magnet 24 is shifted to a position close to the center line X, and the position of the permanent magnet 24 and the position of the permanent magnet 2 are changed.
The first embodiment is characterized in that the fulcrum 54 of the armature 5 is arranged at a position between the magnetic pole piece 20a of the iron core 20 and a position close to the position 4, and that the attraction force characteristics can be unbalanced.
Same as 1. A large mounting space for the coil 41 can be secured by biasing the permanent magnet 24.
The pole piece 20b or the pole piece 20 of the iron core 20 as shown in FIG.
The coil 41 may be mounted on the horizontal piece 20c between the position b and the position where the permanent magnet 24 is disposed. In any of the examples shown in FIGS. 25A and 25B, an electromagnetic relay can be configured by employing the contact structure as shown in FIG.

(Embodiment 18) In the twelfth embodiment, the fulcrum 54 of the armature 50 is positioned between the magnetized position of the intermediate portion deviated from the center and the center line X between the pole pieces 20a and 20b on both sides of the iron core 20. In the present embodiment, FIG.
As shown in (a), the magnetizing position of the intermediate portion is set as the center through which the center line X passes, and the fulcrum 54 is arranged so as to be located between the center line X and the pole piece 20a. This is the same as the twelfth embodiment in that the unbalance can be achieved. In this case, the coil 41 is mounted on the horizontal piece 20c of the iron core 20.

The magnetized position of the intermediate portion of the permanent magnet 24 is shown in FIG.
As shown in FIG. 6B, when the coil 41 is slightly biased toward the fulcrum 54, the coil 41 may be mounted on the pole piece 20a of the iron core 20. In any of the examples shown in FIGS. 26A and 26B, the electromagnetic relay can be configured by employing the contact structure as shown in FIG. (Embodiment 19) In the thirteenth embodiment, the center position Y of the permanent magnet 24 integrally attached to the armature 50 is positioned closer to the pole piece 20a than the center line X passing between the pole pieces 20a and 20b on both sides of the iron core 20. The fulcrum 54 of the armature 50 is displaced between the center line X and the center position Y while being displaced. In the present embodiment, as shown in FIGS. By displacing the position 54 between the center position Y and the magnetic pole piece 20a, the attraction force characteristics are unbalanced. The coil 41 may be mounted on the horizontal piece 20c of the iron core 20 as shown in FIG. 27A or on the magnetic pole piece 20a as shown in FIG. 27B. FIG.
In any of the examples shown in FIGS. 6A and 6B, an electromagnetic relay can be configured by employing a contact structure as shown in FIG.

(Embodiment 20) The permanent magnet 24 is
When the coils having the same characteristics are respectively mounted on the magnetic pole pieces 20a and 20b on both sides of the iron core 20 in the electromagnet driving device having a structure standing on the horizontal piece 20c, as shown in FIG. The permanent magnet 24 stands on the center position of the horizontal piece 20c of the iron core 20, that is, on the center line Y, and the armature 5
The fulcrum 54 of zero is disposed between the center line Y and the pole piece 20a. That is, the fulcrum 54 is deviated from the center while effectively utilizing the arrangement space, so that the suction force characteristics are unbalanced.

When the position of the permanent magnet 24 is deviated in the same manner as in FIG. 25A, the coil 41 attached to the pole piece 20a is a coil having a small number of turns as shown in FIG. The coil 41 mounted on the coil 20b has a large number of turns, and the left and right coils 41, 41 have asymmetry in the characteristics themselves, so that the attraction force characteristics can be unbalanced.

In each of the examples shown in FIGS. 28A and 28B, an electromagnetic relay can be formed by employing the contact structure shown in FIG.

(Embodiment 21) This embodiment is different from the embodiment shown in FIG.
(A) In the configuration shown in (b), each pole piece 20a, 2
In the case of FIG. 26 (a) in which a coil is mounted at 0b and the permanent magnet 24 is used with the magnetized position of the middle part as the center position, as shown in FIG. 29 (a), the two magnetic pole pieces 20a, 20b
The coils 41, 41 having the same characteristics are used.

Further, in the case of FIG. 26B using the permanent magnet 24 in which the magnetized position of the intermediate portion is deviated from the center position,
As shown in FIG. 29B, the coil 41 attached to the pole piece 20a is a coil having a small number of turns, and the coil 41 attached to the pole piece 20b is a coil having a large number of turns. , The suction force characteristics can be unbalanced.

In each of the examples shown in FIGS. 29A and 29B, an electromagnetic relay can be formed by employing the contact structure as shown in FIG.

(Embodiment 22) The permanent magnet 24 is connected to the armature 5
In the electromagnet driving device having a structure integrally attached to the core 0, when coils having the same characteristics are respectively mounted on the pole pieces 20a and 20b on both sides of the iron core 20, in this embodiment, FIG.
As shown in (a), the pole pieces 20b, 2
The center line X passing between 0b and the center position Y of the permanent magnet 24 is matched, and the fulcrum 54 of the armature 50 is arranged so as to be deviated between the center position Y and the pole piece 20a. That is, fulcrum 5
By displacing 4 from the center, the suction force characteristic is unbalanced.

When the center of the permanent magnet 24 is also biased toward the pole piece 20a as shown in FIG. 27, the coil 41 attached to the pole piece 20a is a coil having a small number of turns as shown in FIG. By making the coil 41 mounted on the pole piece 20b a coil with a large number of turns and having the asymmetry in the characteristics of the left and right coils 41, 41, imbalance of the attractive force characteristic can be achieved.

In each of the examples shown in FIGS. 30A and 30B, an electromagnetic relay can be formed by employing the contact structure as shown in FIG.

[0117]

According to the first aspect of the present invention, in the electromagnet driving device constructed as described above, the fulcrum of the permanent magnet and the armature is provided at a position deviated to one side from the center between the magnetic pole pieces on both sides of the iron core. Therefore, the fulcrum of the permanent magnet and the armature is provided at a position deviated to one side from the center between the magnetic pole pieces on both sides of the iron core. There is an effect that it is possible to realize an electromagnet drive device in which the width between the attraction force and the attraction force is wider.

According to a second aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles having opposite ends is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core, and the fulcrum of the armature is arranged at the other end, so that there is an effect that the asymmetry of the attraction force according to the first aspect of the present invention can be easily realized.

According to a third aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles whose both ends are different from each other is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Is arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is arranged on a line passing through the center between the magnetic pole pieces on both sides of the iron core. When used for a relay, it is possible to increase the normally closed side suction force without changing the normally open side suction force. There is an effect that it becomes easy to obtain the matching.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles whose both ends are different from each other is used as the permanent magnet, and one end thereof is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is positioned at the center position between the magnetic pole pieces on both sides of the iron core and the arrangement position of the permanent magnet. When it is incorporated in an electromagnetic relay, it becomes possible to increase the normally open suction force and to reduce the normally closed suction force. There is an effect that it becomes easy to obtain the matching.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles whose both ends are different from each other is used as the permanent magnet, and one end thereof is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is placed on the magnetic pole piece on the side far from the arrangement position of the permanent magnet, In this case, the attraction force characteristic can be further unbalanced as compared with the fourth aspect of the present invention. There is an effect that alignment can be easily performed.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles having opposite ends is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core at a position deviated from the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is set at the position where the permanent magnet is arranged and the magnetic pole of the iron core close to the arrangement position. Since it is located between the pieces, the suction force characteristics are unbalanced and the coil is mounted (winding)
There is an effect that a larger space can be secured.

According to a seventh aspect of the present invention, in the first aspect of the present invention, a permanent magnet magnetized on magnetic poles whose both ends are different from each other is used as the permanent magnet, and one end of the magnet is parallel to the pole piece of the iron core. Is disposed on the horizontal piece of the iron core corresponding to the center between the magnetic pole pieces on both sides of the iron core, and the fulcrum of the armature is shifted from the center position between the two magnetic pole pieces of the iron core to one magnetic pole piece side. Because of the arrangement, there is an effect that imbalance in the suction force characteristics can be achieved while effectively securing a space for mounting (winding) the coil.

According to an eighth aspect of the present invention, in the first aspect of the present invention, there is provided a permanent magnet in which both ends are magnetized to have the same polarity and an intermediate portion deviated from the center of both ends is magnetized to a different polarity. The permanent magnet is bridged so that both ends of the permanent magnet are in contact with the inner surfaces of the tips of the pole pieces on both sides of the iron core, and the fulcrum of the armature corresponds to the magnetized position of the middle part of the permanent magnet. Since the magnets are arranged, it is possible to achieve the asymmetry easily by simply shifting the magnetized position of the intermediate portion of the permanent magnet as in the second aspect.

According to a ninth aspect of the present invention, in accordance with the first aspect of the present invention, there is provided the permanent magnet, wherein both ends of the permanent magnet are magnetized to have the same polarity, and an intermediate portion deviated from the center of both ends is magnetized to a different polarity. The permanent magnet is bridged so that both ends of the permanent magnet are in contact with the inner surfaces of the tips of the pole pieces on both sides of the core, and the fulcrum of the armature passes through the center between the pole pieces on both sides of the core. Since it is located at the position corresponding to the line, when used for an electromagnetic relay, without changing the suction force on the normally open side,
It is possible to increase the suction force on the normally closed side, so that it is possible to achieve imbalance in the suction force characteristics, and it is possible to easily achieve matching with the asymmetric spring load.

According to a tenth aspect, in the first aspect, both ends of the permanent magnet are magnetized to have the same polarity.
Using permanent magnets whose intermediate portions deviated from the center are magnetized with different polarities, both ends of the permanent magnets are bridged so as to face the inner surfaces of the front ends of the pole pieces on both sides of the iron core. Since the fulcrum of the pole is located between the center position between the magnetic pole pieces on both sides of the iron core and the magnetized position of the middle part of the permanent magnet, when incorporated in an electromagnetic relay, the normally open side attracting force is increased. In addition, it is possible to reduce the suction force on the normally closed side, and therefore, there is an effect that alignment with an asymmetric spring load can be easily achieved particularly in a single type design.

According to an eleventh aspect, in the first aspect, both ends of the permanent magnet are magnetized to have the same polarity.
Using a permanent magnet magnetized to a different polarity at an intermediate portion deviated from the center in both end directions, both ends of the permanent magnet are bridged so as to face the inner surfaces of the front ends of the pole pieces on both sides of the iron core. The fulcrum of the armature is arranged between the center position between the magnetic pole pieces on both sides of the iron core and the magnetic pole piece far from the magnetized position of the intermediate portion of the permanent magnet. In comparison with this, it is possible to further unbalance the suction force characteristic, and therefore, it is possible to easily match the asymmetric spring load particularly in a single type design.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, both ends of the permanent magnet are magnetized to have the same polarity.
Using a permanent magnet magnetized to a different polarity at an intermediate portion deviated from the center in both end directions, both ends of the permanent magnet are bridged so as to face the inner surfaces of the front ends of the pole pieces on both sides of the iron core. Since the fulcrum of the armature is disposed between the magnetized position of the intermediate portion of the permanent magnet and the magnetic pole piece of the iron core closer to the magnetized position, the space for mounting (winding) the coil is reduced. There is an effect that the suction force characteristics can be unbalanced without worry.

According to a thirteenth aspect, in the first aspect, both ends of the permanent magnet are magnetized to have the same polarity.
Using permanent magnets whose center parts in both end directions are magnetized with different polarities, both ends of the permanent magnet are bridged so as to face the inner surfaces of the front ends of the pole pieces on both sides of the iron core. The fulcrum is located at a position deviated from the center position between the magnetic pole pieces on both sides of the iron core to one magnetic pole piece, so that there is no need to worry about the space for mounting (winding) the coil, and the attraction force characteristics can be unbalanced. There is an effect that can be achieved.

According to a fourteenth aspect of the present invention, in the first aspect of the present invention, since the permanent magnet is integrally attached so as to be parallel to the armature, the permanent magnet is not provided on the iron core side, and thus the coil mounted on the iron core is provided. Can increase the space that can be occupied, and as a result, the number of turns of the coil can be increased.

According to a fifteenth aspect of the present invention, in accordance with the fourteenth aspect of the present invention, the permanent magnet is fixed to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. And the fulcrum of the armature is arranged on the line passing through the center between the pole pieces on both sides of the iron core.When used for an electromagnetic relay, it does not change the suction force on the normally open side, and is normally closed. This makes it possible to increase the suction force on the side, so that it is possible to achieve an imbalance in the suction force characteristics, and it is possible to easily match with the asymmetric spring load.

According to a sixteenth aspect of the present invention, in the fourteenth aspect of the present invention, the permanent magnet is positioned such that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. And the fulcrum of the armature was arranged at a position deviated between the line passing through the center between the pole pieces on both sides of the iron core and the center position of the permanent magnet. In this case, the normally open suction force can be increased and the normally closed suction force can be reduced, so that it is easy to easily match the asymmetric spring load especially in a single type design.

In a seventeenth aspect of the present invention, in the fourteenth aspect of the present invention, the permanent magnet is fixed to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. At the same time, the fulcrum of the armature was disposed between the pole piece of the iron core farther from the center position of the permanent magnet and the center position between both pole pieces. As compared with the present invention, it is possible to further unbalance the suction force characteristic, and therefore, there is an effect that the alignment with the asymmetric spring load can be easily achieved particularly in the single type design.

According to an eighteenth aspect of the present invention, in accordance with the fourteenth aspect of the present invention, the permanent magnet is positioned such that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. In addition, since the fulcrum of the armature was disposed at a position corresponding to the center position of the permanent magnet and the pole piece of the iron core closer to the center position,
Without worrying about the space for coil installation (winding),
There is an effect that the attraction force characteristics can be unbalanced.

In a nineteenth aspect of the present invention, in accordance with the fourteenth aspect of the present invention, the permanent magnet is positioned such that the center of the permanent magnet is positioned on a line passing through the center between the pole pieces on both sides of the iron core. The fulcrum of the armature is attached to the armature and the fulcrum of the armature is arranged at a position deviated to one side of one of the magnetic poles of the iron core. There is an effect that the characteristics can be unbalanced.

The twentieth aspect of the present invention is the first aspect of the present invention.
In any one of the inventions of (1) to (12) and (1) to (18), since there is only one coil, there is an effect that an asymmetric attractive force in an excited state can be secured.

According to a twenty-first aspect of the present invention, in the twentieth aspect, the coil is mounted at an iron core position from a position where the fulcrum of the armature is displaced to a position including the pole piece on the center direction side. This has the effect that the width of the suction force on the side where the coil is mounted can be increased.

According to a twenty-second aspect of the present invention, in any one of the first to nineteenth aspects of the present invention, the coil is moved from the position where the fulcrum of the armature is displaced to the position of the iron core from the position including the pole pieces on both sides. Since each is mounted, there is an effect that the suction force on both sides of the fulcrum can be increased.

According to a twenty-third aspect of the present invention, in the electromagnetic relay configured as described above, the permanent magnet is located at a position deviated from the center between the pole pieces on both sides of the iron core in a direction opposite to the end direction of the contact spring. In addition, since the fulcrum of the armature is provided, the asymmetry of the attraction force can be achieved and an electromagnetic relay having a contact spring on one side and easy to match with an asymmetric spring load can be realized.

According to a twenty-fourth aspect of the present invention, in the twenty-third aspect of the present invention, a permanent magnet magnetized on magnetic poles having opposite ends is used as the permanent magnet, and one end of the permanent magnet is parallel to the pole piece of the iron core. Are arranged on the horizontal piece of the iron core, and the fulcrum of the armature is arranged at the other end, so that it is easy to realize the asymmetry of the attraction force of claim 23.

According to a twenty-fifth aspect of the present invention, in the twenty-third aspect of the present invention, a permanent magnet magnetized at different magnetic poles at both ends is used as the permanent magnet, and one end thereof is parallel to the pole piece of the iron core. 24. The magnetic head according to claim 24, wherein the magnetic poles are arranged at positions offset from the center between the pole pieces on both sides of the iron core, and the fulcrum of the armature is arranged on a line passing through the center between the magnetic pole pieces.
Similarly to the above, there is an effect that realization of asymmetry is easy.

According to a twenty-sixth aspect of the present invention, in the twenty-third aspect of the present invention, the permanent magnet is integrally attached so as to be parallel to the armature. Can increase the space that can be occupied, and as a result, the number of turns of the coil can be increased.

The invention of claim 27 is the invention of claims 23 to 26
In any of the inventions described above, since the number of coils is one, there is an effect that an asymmetric attractive force in an excited state can be secured.

The invention of claim 28 is the invention of claims 23 to 26
In any one of the inventions described above, the coil is mounted at the iron core position from the position where the fulcrum of the armature is displaced to the position including the pole piece on the center side, so that the coil can be aligned with respect to the asymmetric spring load. There is an effect that easy suction force can be secured.

According to a twenty-ninth aspect of the present invention, in any one of the twenty-third to twenty-third aspects of the present invention, the coil is positioned at a position from the position where the fulcrum of the armature is displaced to the position where the pole pieces on both sides are included. Are attached, the width of the suction force on both sides can be secured, and therefore, there is an effect that the suction force that can be easily adjusted can be secured.

The invention of claim 30 is the invention of claims 23 to 29
In any of the inventions described above, the contact spring has a hinge spring whose one end is fixed to the armature and the other end is fixed on the body from a direction opposite to the other end of the contact spring. Thus, there is an effect that a space for arranging the hinge spring is secured to effectively use the space, and a small electromagnetic relay can be manufactured.

According to a thirty-first aspect of the present invention, in the thirty-third aspect, the hinge spring is substantially U-shaped, and at least the plate surfaces on both side pieces are made to be in the same direction as the plate surface of the contact spring. Is fixed to the armature, and the other side piece is laterally arranged in parallel with the armature, and the tip of the side piece is fixed on the body, so that the spring can be adjusted by biasing the center piece. There is an effect that can be.

According to a thirty-second aspect of the present invention, in the thirty-first aspect, the center piece of the hinge spring is formed by bending the plate so that the plate surface is perpendicular to the plate surfaces of the two side pieces. The spring adjustment can be performed by pinching and biasing with an adjusting tool or the like, so that there is an effect that the adjusting operation is easily performed.

According to a thirty-third aspect of the present invention, in the thirty-third to thirty-second aspects, the position of the hinge spring fixed on the body is near the fulcrum position of the armature. There is an effect that movement can be reduced and a stable operation can be obtained.

[Brief description of the drawings]

FIG. 1A is a schematic configuration diagram of an electromagnet driving device according to a first embodiment of the present invention. (B) is an explanatory view of the suction force characteristic of the above.

FIG. 2 is a diagram illustrating the principle of the above.

FIG. 3 is an explanatory diagram of a suction force characteristic used for explaining the principle.

FIG. 4 is a schematic configuration diagram in which a part of an electromagnet driving device according to a second embodiment of the present invention is omitted.

FIG. 5 is a schematic configuration diagram in which a part of an electromagnet driving device according to a third embodiment of the present invention is omitted.

FIG. 6 is a schematic configuration diagram of an electromagnetic relay according to a fourth embodiment of the present invention.

FIG. 7 is an exploded perspective view of the same.

FIG. 8 (a) is a plan sectional view of the above, which can be partially broken. (B) is a side sectional view of the same. (C) is a side sectional view of another position of the above. (D) is an electric circuit diagram of the same.

FIG. 9 is an exploded perspective view of the same coil block.

FIG. 10 is an exploded perspective view of Embodiment 5 of the present invention.

FIG. 11 is a schematic configuration diagram of an electromagnetic relay according to a sixth embodiment of the present invention.

FIG. 12 is a schematic configuration diagram of an electromagnetic relay according to a seventh embodiment of the present invention.

FIG. 13 is a schematic configuration diagram in which an electromagnet driving device according to an eighth embodiment of the present invention is partially omitted.

FIG. 14 is an explanatory diagram of a suction force characteristic of the above.

FIG. 15 is a schematic configuration diagram in which a part of an electromagnet driving device according to a ninth embodiment of the present invention is omitted.

FIG. 16 is a schematic configuration diagram in which a part of an electromagnet driving device according to a tenth embodiment of the present invention is omitted.

FIG. 17 is a schematic configuration diagram in which an electromagnet drive device according to an eleventh embodiment of the present invention is partially omitted.

FIG. 18 is an explanatory diagram of a suction force characteristic of the above.

FIG. 19 is a schematic configuration diagram in which a part of an electromagnet driving device according to a ninth embodiment of the present invention is omitted.

FIG. 20 is a schematic configuration diagram in which an electromagnet drive device according to a tenth embodiment of the present invention is partially omitted.

FIG. 21 is a schematic configuration diagram in which an electromagnet driving device according to an eleventh embodiment of the present invention is partially omitted.

FIG. 22 is an explanatory diagram of a suction force characteristic of the above.

FIG. 23 is a schematic configuration diagram in which a part of an electromagnet drive device according to a twelfth embodiment of the present invention is omitted.

FIG. 24 is a schematic configuration diagram in which a part of an electromagnet driving device according to a thirteenth embodiment of the present invention is omitted.

FIG. 25 (a) is a schematic configuration diagram in which an example of an electromagnet driving device according to a fourteenth embodiment of the present invention is partially omitted. (B) is a schematic block diagram in which another example of the above is partially omitted.

FIG. 26A is a schematic configuration diagram in which an example of an electromagnet driving device according to Embodiment 15 of the present invention is partially omitted. (B) is a schematic block diagram in which a modification of the above is partially omitted.

FIG. 27A is a schematic configuration diagram in which an example of an electromagnet driving device according to a sixteenth embodiment of the present invention is partially omitted. (B) is a schematic block diagram in which another example of the above is partially omitted.

FIG. 28 (a) is a schematic configuration diagram in which an example of an electromagnet driving device according to a seventeenth embodiment of the present invention is partially omitted. (B) is a schematic block diagram in which a modification of the above is partially omitted.

FIG. 29 (a) is a schematic configuration diagram in which an example of an electromagnet driving device according to an eighteenth embodiment of the present invention is partially omitted. (B) is a schematic block diagram in which a modification of the above is partially omitted.

FIG. 30A is a schematic configuration diagram in which an example of an electromagnet driving device according to a nineteenth embodiment of the present invention is partially omitted. (B) is a schematic block diagram in which another example of the above is partially omitted.

FIG. 31A is a schematic configuration diagram of a conventional bistable electromagnetic relay. (B) is an explanatory view of a suction force characteristic and a spring load characteristic of the above.

FIG. 32 (a) shows 2a using a conventional electromagnet driving device.
FIG. 2 is a schematic configuration diagram of a type electromagnetic relay. (B) is an explanatory view of a suction force characteristic and a spring load characteristic of the above.

FIG. 33A is a schematic configuration diagram of an electromagnetic relay obtained by improving the electromagnetic relay of FIG. (B) is an explanatory view of a suction force characteristic and a spring load characteristic of the above.

[Explanation of symbols]

 Reference Signs List 20 Iron core 20a, 20b Magnetic pole piece 20c Central piece 24 Permanent magnet 41 Coil 50 Armature 54 Projection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shunsuke Ega 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. F-term (reference) 5E048 AA08 AB04 AC05 AD17

Claims (33)

[Claims] 1. A substantially U-shaped iron core having parallel magnetic pole pieces on both sides, at least one coil mounted on the iron core, and a seesaw movable about a fulcrum provided between the both ends, and both ends of the iron core are connected to each other by the seesaw. An armature opposed to the pole face of the tip of each leg piece, and one end of the armature and the iron core via the tip pole face of the pole piece of the iron core corresponding to this end constitutes a closed magnetic path. A permanent magnet that attracts one end of the armature to the tip magnetic pole surface of the corresponding leg of the iron core, and an exciting current that flows through the coil in a direction to cancel the magnetic force of the permanent magnet, thereby enabling the armature to be inverted. 3. The electromagnet driving device according to claim 1, wherein the fulcrum of the permanent magnet and the armature is provided at a position deviated to one side from the center between the magnetic pole pieces on both sides of the iron core. 2. A permanent magnet having both ends magnetized to different magnetic poles, one end of which is arranged on a horizontal piece of the iron core such that both ends are parallel to the pole pieces of the iron core. 2. The electromagnet driving device according to claim 1, wherein a fulcrum of the armature is disposed on the armature. 3. A permanent magnet having both ends magnetized to different magnetic poles, and one end of which is parallel to the pole piece of the iron core, and one end of which is located between the centers of the pole pieces on both sides of the iron core. Arranged on the side of the iron core at the deviated position,
2. The electromagnet driving device according to claim 1, wherein the fulcrum of the armature is arranged on a line passing through the center between the pole pieces on both sides of the iron core. 4. A permanent magnet having both ends magnetized to different magnetic poles, and one end of which is parallel to the pole pieces of the iron core, and one end of which is positioned between the centers of the pole pieces on both sides of the iron core. Arranged on the side of the iron core at the deviated position,
2. The electromagnet driving device according to claim 1, wherein the fulcrum of the armature is arranged between a center position between magnetic pole pieces on both sides of the iron core and an arrangement position of the permanent magnet. 5. A permanent magnet having both ends magnetized to different magnetic poles, and one end of which is parallel to the pole piece of the iron core and whose one end is located between the centers of the pole pieces on both sides of the iron core. Arranged on the side of the iron core at the deviated position,
2. The electromagnet drive according to claim 1, wherein the fulcrum of the armature is arranged between a pole piece of the iron core farther from a position where the permanent magnet is arranged and a center position between the pole pieces on both sides. apparatus. 6. A permanent magnet which is magnetized at different magnetic poles at both ends as said permanent magnet, and one end of which is parallel to the magnetic pole piece of said iron core and whose one end is located between the centers of the magnetic pole pieces on both sides of said iron core. Arranged on the side of the iron core at the deviated position,
2. The electromagnet driving device according to claim 1, wherein a fulcrum of the armature is disposed between a position where the permanent magnet is disposed and a pole piece of the iron core closer to the position where the permanent magnet is disposed. 7. A permanent magnet magnetized on magnetic poles of which both ends are different from each other as the permanent magnet, one end of which is parallel to the magnetic pole piece of the iron core and one end of which is located at the center between the magnetic pole pieces on both sides of the iron core. 2. The armature according to claim 1, wherein the armature is disposed on a corresponding lateral piece of the iron core, and the fulcrum of the armature is arranged at a position deviated to one magnetic pole piece side from a center position between both magnetic pole pieces of the iron core. Electromagnet drive. 8. A permanent magnet whose both ends are magnetized to have the same polarity and whose intermediate portion deviated from the center in both end directions is magnetized to have a different polarity. 2. The magnetic pole piece according to claim 1, wherein the pole piece is bridged so as to be in contact with the inner surface of the front end, and the fulcrum of the armature is arranged corresponding to the magnetized position of the intermediate portion of the permanent magnet. Electromagnet drive. 9. Both ends of said permanent magnet are magnetized by using permanent magnets whose both ends are magnetized to have the same polarity, and whose intermediate portion deviated from the center in both end directions is magnetized to have a different polarity. The pole piece is arranged in a bridge so as to be in contact with the inner surface of the tip of the pole piece, and the fulcrum of the armature is arranged at a position corresponding to a line passing through the center between the pole pieces on both sides of the iron core. The electromagnet drive device according to claim 1. 10. A permanent magnet whose both ends are magnetized to have the same polarity and whose center portion deviated from the center is magnetized to have a different polarity. And a fulcrum of the armature is disposed between a center position between pole pieces on both sides of the iron core and a magnetized position of an intermediate portion of the permanent magnet. The electromagnet drive device according to claim 1, wherein: 11. A permanent magnet having both ends magnetized to have the same polarity and an intermediate portion deviated from the center in both end directions magnetized to have different polarities. A bridge is arranged so as to be in contact with the inner surface of the tip of the pole piece, and the fulcrum of the armature is far from the center position between the pole pieces on both sides of the iron core and the magnetized position of the intermediate part of the permanent magnet. 2. The electromagnet driving device according to claim 1, wherein the electromagnet driving device is arranged between the magnetic pole piece on the side. 12. A permanent magnet whose both ends are magnetized to have the same polarity and whose intermediate portion deviated from the center in both end directions is magnetized to have a different polarity. And a fulcrum of the armature with the magnetized position of the intermediate portion of the permanent magnet and the magnetic pole piece of the iron core closer to the magnetized position. 2. The electromagnet driving device according to claim 1, wherein the electromagnet driving device is disposed between the electromagnet driving device and the device. 13. A permanent magnet having both ends magnetized to have the same polarity and a center part in both end directions magnetized to have different polarities, wherein both ends of the permanent magnet are connected to the pole pieces on both sides of the iron core. The bridge is arranged so as to be in contact with the inner surface of the tip, and the fulcrum of the armature is arranged at a position deviated to one magnetic pole piece side from a center position between the magnetic pole pieces on both sides of the iron core. Item 2. The electromagnet driving device according to Item 1. 14. The electromagnet driving device according to claim 1, wherein said permanent magnet is integrally attached so as to be parallel to the armature. 15. The permanent magnet is attached to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core, and the fulcrum of the armature is set. 15. The electromagnet driving device according to claim 14, wherein the magnet core is arranged on a line passing through the center between the pole pieces on both sides of the iron core. 16. The permanent magnet is attached to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core, and a fulcrum of the armature is set. A line passing through the center between the pole pieces on both sides of the core,
The electromagnet driving device according to claim 14, wherein the electromagnet driving device is disposed at a position deviated from a center position of the permanent magnet. 17. The permanent magnet is attached to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. 15. The electromagnet driving device according to claim 14, wherein a fulcrum is disposed between a pole piece of the iron core far from a center position of the permanent magnet and a center position between both pole pieces. 18. The permanent magnet is attached to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. 15. The electromagnet driving device according to claim 14, wherein the fulcrum is disposed at a position corresponding to a position between a center position of the permanent magnet and a pole piece of the iron core closer to the center position. 19. The permanent magnet is attached to the armature so that the magnetized position of the center of the permanent magnet is located on a line passing through the center between the pole pieces on both sides of the iron core. 15. The electromagnet driving device according to claim 14, wherein a fulcrum of the pole is arranged at a position deviated to one magnetic pole one side of the iron core. 20. The electromagnet driving device according to claim 1, wherein the number of coils is one. 21. The electromagnet driving device according to claim 20, wherein said coil is mounted at an iron core position from a position where a fulcrum of said armature is displaced to a position including a pole piece on a center direction side. . 22. The apparatus according to claim 1, wherein said coils are mounted at iron core positions from a position where the fulcrum of said armature is displaced to a position including the pole pieces on both sides.
The electromagnet drive device according to any one of the above. 23. A substantially U-shaped iron core having parallel magnetic pole pieces on both sides, at least one coil mounted on the iron core, and a seesaw movable about a fulcrum provided between both ends, and both ends of the iron core are free to move. An armature opposed to the pole face of the tip of each leg piece, and one end of the armature and the iron core via the tip pole face of the pole piece of the iron core corresponding to this end constitutes a closed magnetic path. A permanent magnet that attracts one end of the armature to the tip magnetic pole surface of the corresponding leg of the iron core to form an electromagnet block, disposing the electromagnet block on the body, and arranging the armature parallel to the armature. And one end is attached to the armature,
A movable contact provided at the other end extended toward the end of the armature is opposed to a fixed contact provided on the body, and the movable contact is moved relative to the fixed contact according to a seesaw operation of the armature. A contact spring for contacting and separating, and an electromagnetic relay in which the armature can be reversed by passing an exciting current in a direction to cancel the magnetic force of the permanent magnet through the coil, the center between the magnetic pole pieces on both sides of the iron core. An electromagnetic relay, wherein a fulcrum of the permanent magnet and the armature is provided at a position deviated in a direction opposite to an end direction of the contact spring. 24. A permanent magnet having both ends magnetized to different magnetic poles, one end of which is arranged on a horizontal piece of the iron core such that both ends are parallel to the magnetic pole piece of the iron core.
24. The electromagnetic relay according to claim 23, wherein a fulcrum of the armature is arranged at the other end. 25. A permanent magnet magnetized on magnetic poles of which both ends are different as said permanent magnet, one end of which is parallel to the magnetic pole piece of said iron core and one end of which is located between the centers of the magnetic pole pieces on both sides of said iron core. 24. The electromagnetic relay according to claim 23, wherein the electromagnetic relay is arranged at a deviated position, and the fulcrum of the armature is arranged on a line passing through the center between the pole pieces. 26. The electromagnetic relay according to claim 23, wherein said permanent magnet is integrally attached so as to be parallel to the armature. 27. The electromagnetic relay according to claim 23, wherein the number of coils is one. 28. The coil according to claim 23, wherein said coil is mounted at an iron core position from a position at which a fulcrum of said armature is displaced to a position including a magnetic pole piece on a center direction side. Electromagnetic relay as described. 29. The coil according to claim 23, wherein said coil is mounted at an iron core position from a position where a fulcrum of said armature is displaced to a position including said pole pieces on both sides.
7. The electromagnetic relay according to any of 6. 30. A contact spring according to claim 23, further comprising a hinge spring having one end fixed to said armature and the other end fixed to said body from a direction opposite to the other end of said contact spring. 29. The electromagnetic relay according to any of 29. 31. The hinge spring is substantially U-shaped, and at least the plate surfaces of both side pieces are made to have the same direction as the plate surface of the contact spring,
31. The tip of one side piece is fixed to the armature, and the other side piece is arranged laterally parallel to the armature, and the tip of the side piece is fixed to the body. Electromagnetic relay. 32. The electromagnetic relay according to claim 31, wherein a center piece of the hinge spring is bent so that a plate surface is perpendicular to plate surfaces of both side pieces. 33. The electromagnetic relay according to claim 30, wherein a position where the hinge spring is fixed on the body is near a fulcrum position of the armature.