JP2598611B2 - Single-stable type polarized electromagnet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-stable type polarized electromagnet having a simple structure.

[0002]

2. Description of the Related Art FIG. 6 shows an embodiment of a conventional single-stable type polarized electromagnet. A conventional single-stable type polarized electromagnet 11 is formed by, for example, laser welding between a coil block 12 assembled by winding a coil 12A around a substantially U-shaped iron core 12B, and a facing magnetic pole 13A and a magnetic pole 13B of the iron core 12B. It is composed of a fixed mountain-shaped permanent magnet 14 and an armature 15 that rotates around a fulcrum 15C that is in contact with the apex of the mountain-shaped permanent magnet 14.

The armature 15 is connected to the end 15A or the end 15A.
B (in the figure, 15B) is a non-magnetic metal piece 1
6 are fixed by welding or the like, and the end portions 15A and 15B are respectively the magnetic pole faces 13a and 13b of the coil block 2.
, The magnetic resistance of the side having the non-magnetic metal piece 16 is high (15B side in the figure).

[0004] The mountain-shaped permanent magnet 14 has S at both ends in the longitudinal direction.
The pole and the center are magnetized in advance to the N pole, the concave portion is provided at the peak of the mountain shape, the fulcrum 15C (convex portion) of the armature 15 is supported, and the arrangement accuracy when the single-stable type polarized electromagnet 11 is formed. The magnetic pole 13A and the magnetic pole 13B
It is fixed by laser welding or the like in between.

As described above, since the armature 15 moves in a seesaw motion about the fulcrum 15C and the ends 15A and 15B contact the magnetic pole surfaces 13a and 13b of the magnetic poles 13A and 13B, respectively, the coil block 2 In the non-excited state where power is not applied, the magnetizing action of the mountain-shaped permanent magnet 14 always forms a monostable state in which the end 15A having a small magnetic resistance contacts the magnetic pole surface 13A. Be composed.

Further, a single-stable type polarized electromagnet 1
1 indicates that when a power supply having a predetermined polarity is applied to the coil block 12, one magnetic pole (for example, the magnetic pole 13A)
The connection is switched to the other magnetic pole (for example, the magnetic pole 13B), and when the power is removed, the connection returns to the original magnetic pole (for example, the magnetic pole 13A).

Next, the single stable operation of the conventional single-stable type polarized electromagnet 11 will be described.
FIG. 7 is a diagram illustrating the operation of a conventional single-stable type polarized electromagnet. 7A shows a non-excited stable state in which power is not applied to the coil block 12, and the armature 15 is fixed to the end 15B due to an increase in the magnetic resistance of the non-magnetic metal piece 16 fixed to the end 15B. The end 15A having a low magnetic resistance rotates around the fulcrum 15C toward the magnetic pole 13A, and the end 1A.
5A contacts the magnetic pole surface 13a to form a monostable (single stable) state. In this state, the magnetic pole 13A side of the iron core 12B-the mountain-shaped permanent magnet 14-the armature 15 (end 15
(A side)-A magnetic circuit is formed in which the magnetic pole 13A side of the iron core 12B is formed as a loop, the magnetic flux Φa is generated in the direction of the arrow, and a stable state is formed.

From the non-excitation state, as shown in FIG. 3 (b), immediately after the power supply whose polarity is determined is applied to the coil block 12, immediately after the coil block 12 is excited, the coil block 12 forms an electromagnet, and the magnetic pole 13A side becomes the N pole by the action of the electromagnet. , The magnetic pole 13B side is magnetized to the S pole, and a force corresponding to the product of the current I flowing through the coil 12A and the number of turns of the coil (the number of turns N) acts on the magnetic pole 13A side of the armature 15 (N pole). ) With repulsive force, armature 1
The magnetic pole 13B side of 5 has different poles (S poles), and the attractive force acts on each pole. In this state, together with the magnetic flux Φa, the iron core 1
2B-Mountain permanent magnet 14-Armature 15 (end 15B)-
A magnetic circuit is formed in which the nonmagnetic metal piece 16-the magnetic pole 13B side of the iron core 12B-the iron core 12B is formed as a loop, a magnetic flux Φb is generated in the direction of the arrow, and a strong magnetic force (attraction) is generated between the end 15B and the magnetic pole 13B. Force) acts.

FIG. 3C shows the state of FIG.
5 shows an inverted state in which the end 15A is separated from the pole face 13a and the end 15B is in contact with the pole face 13b via the nonmagnetic metal piece 16. In this state, the end 15B of the armature 15
And the magnetic pole surface 13b are in contact with each other, the magnetic flux Φb in FIG.
Pole 13B side-mountain permanent magnet 14-armature 15 (end 15B)-non-magnetic metal piece 16-magnetic pole 13 of iron core 12B
A magnetic circuit having a loop on the B side is formed, and a magnetic flux Φc is generated in the direction of the arrow, and the end portion 15B and the magnetic pole surface 13b come into contact with each other, and a stronger magnetic force (attractive force) acts.

When the power supply is removed from this state, the magnetic resistance of the non-magnetic metal piece 16 fixed to the end 15B increases.
The mountain-shaped permanent magnet 14 operates in the same manner as in the first state, and the magnetic pole 13A side of the iron core 12B-the mountain-shaped permanent magnet 14-the armature 1
5 (end 15A) —A magnetic circuit is formed with a loop formed by the magnetic pole 13A side of the iron core 12B, a magnetic flux Φa is generated in the direction of the arrow in FIG. 5A, and the armature 15 has a magnetic resistance around the fulcrum 15C. The lower end 15A rotates toward the magnetic pole 13A again,
The end 15A comes into contact with the magnetic pole surface 13a and is restored to a monostable (single stable) state.

As described above, since the conventional single-stable type polarized electromagnet 11 performs a monostable operation, the movable contact (not shown) is mounted on the armature 15 and the fixed contact (see FIG. (Not shown), a single stable relay is configured.

[0012]

In the conventional single-stable type polarized electromagnet 11, since the magnetic resistance on both sides is formed asymmetrically about the fulcrum 15C of the armature 15, the end 15A or 15B of the armature 15 is formed. Since the thin non-magnetic metal piece 16 is fixed by welding or the like, the non-magnetic metal piece 16 is deformed due to heat at the time of welding, causing variations in the stroke of the electromagnet. There is a problem that the opening characteristics vary.

Further, the conventional single-stable type polarized electromagnet 11 uses a mountain-shaped permanent magnet 14 as a permanent magnet and rotates around a fulcrum 15C of an armature 15 in contact with the apex of the mountain-shaped permanent magnet 14. Because of the configuration, the shape becomes complicated, and the dimension of the mountain-shaped permanent magnet 14 is required to be accurate, and welding is required to fix the nonmagnetic metal piece 16 and the mountain-shaped permanent magnet 14, resulting in an increase in cost. There is.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a single-stable type polarized electromagnet having a simple structure, easy to assemble, and excellent in stability. is there.

[0015]

In order to solve the above-mentioned problems, a single-stable type polarized electromagnet according to the present invention is inserted between one of the opposed magnetic poles and a plate-like yoke, and one surface of which is opposed to the opposed magnetic pole. And a substantially Z-shaped thin-film non-magnetic metal piece that is in close contact with one of the magnetic pole surfaces and the other surface is in close contact with the lower surface of the flat yoke.

Further, the single-stable type polarized electromagnet according to the present invention is characterized in that, when the flat yoke is inserted and fixed between the opposed magnetic poles, the yoke is pressed together with the thin-film non-magnetic metal piece.

Further, the single-stable type polarized electromagnet according to the present invention is characterized in that a recess is formed in a flat yoke asymmetrically at the center line between the magnetic poles, and a rectangular permanent magnet is arranged in the recess. I do.

Further, the single-stable type polarized electromagnet according to the present invention is characterized in that a magnetic resistance adjusting portion for adjusting the magnetic resistance is formed on a flat yoke.

Further, in the single-stable type polarized electromagnet according to the present invention, a mountain-shaped convex portion having an inclined portion is provided at a portion where the armature comes into contact with the permanent magnet, and the armature rotates about the mountain-shaped convex portion as a fulcrum. It is characterized by exercising.

[0020]

The single-stable type polarized electromagnet according to the present invention comprises a substantially Z-shaped thin-film non-magnetic metal piece in which one surface is in close contact with one of the magnetic pole surfaces and the other surface is in close contact with the lower surface of the flat yoke. With this arrangement, the magnetic resistance can be formed asymmetrically, and a monostable state can be formed.

Further, the single-stable type polarized electromagnet according to the present invention can be press-fitted together with the thin-film non-magnetic metal piece when the flat yoke is inserted and fixed between the opposed magnetic poles.

Further, the single-stable type polarized electromagnet according to the present invention has a simple configuration in which a plate-shaped yoke has a recess formed asymmetrically at the center line between the magnetic poles and a rectangular permanent magnet is disposed in the recess. With the configuration, a monostable state can be configured.

Further, in the single-stable type polarized electromagnet according to the present invention, since a magnetoresistance adjusting portion including a penetrating portion or a cutout for adjusting the magnetoresistance is formed in the flat yoke,
A monostable state can be formed by simultaneously forming the magnetoresistive adjusting portion when the flat yoke is formed.

Further, in the single-stable type polarized electromagnet according to the present invention, a mountain-shaped convex portion having an inclined portion is provided at a portion where the armature comes into contact with the permanent magnet. Rotary movement can be ensured.

[0025]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show the configuration of a single-stable type polarized electromagnet according to the present invention. FIG. 1 is an overall configuration diagram of a single-stable type polarized electromagnet according to the present invention, FIG.
FIG. 3 is a configuration diagram of an electromagnet block of the single-stable polarized electromagnet according to the present invention, FIG. 3 is an assembly diagram of the single-stable polarized electromagnet according to the present invention, and FIG. 4 is a cross section of the single-stable polarized electromagnet according to the present invention. The figure is shown.

1 to 4, a single-stable type polarized electromagnet 1 has a substantially U-shaped iron core 2B and a coil 2A.
And a magnetic circuit between the coil block 2 and the iron core 2B which are inserted and fixed between the magnetic poles 3A and 3B of the coil block 2 to form a magnetic circuit. A flat yoke 4 provided with
Rotate around a rectangular permanent magnet 5 disposed in a concave portion 4A provided to be biased to one side from a central portion of the magnetic pole and a mountain-shaped convex portion 6C provided in the central portion, and the end portion 6A and the end portion 6B are respectively magnetic poles 3A. Armature 6 in contact with the magnetic pole 3B side, and a thin-film non-magnetic material inserted between the end (the end 6B in the figure) and the magnetic pole face (the magnetic pole face b in the figure) of the armature 6 to increase the magnetic resistance And a metal piece 7.

The coil block 2 includes a coil electrode (+) 2
a, an electromagnet is formed by applying a power source whose polarity is determined in advance between the coil electrodes (-) 2b, and the magnetic pole 3 corresponding to the direction of the current flowing through the coil 2A (right thumb rule).
A and 3B polarities (N and S poles) are set, while the product of the number of turns of the coil 2A and the value of the current flowing through the coil 2A (magnetomotive force)
And a magnetic flux that is inversely proportional to the resistance (magnetic resistance) of the magnetic circuit.

The coil block 2 has a magnetic pole surface 3a and a magnetic pole surface 3b formed on the upper surfaces of the magnetic poles 3A and 3B, respectively.
The armature 6 rotates about the ridge 6C as a fulcrum, and the end 6A.
And the magnetic pole surface 3a, and the magnetic pole surface 3b is in contact with the end 6B via the thin-film non-magnetic metal piece 7.

As shown in FIG. 2, the plate-shaped yoke 4 has a rectangular permanent magnet 5 formed by forming an asymmetric rectangular recess 4A at the center line X between the opposed magnetic poles 3A and 3B of the coil block 2. And the magnetizing action of the rectangular permanent magnet 5 is asymmetric with respect to the center line X.

The plate-like yoke 4 forms a magnetoresistive adjusting portion 4B formed by a penetrating portion or a notch portion which increases the magnetoresistance on the side where the volume of the concave portion 4A is smaller than the center line X.
When forming the plate-shaped yoke 4, the magnetic resistance adjusting portion 4B can be formed simultaneously by punching or the like.

The rectangular permanent magnet 5 is provided in the recess 4A so as to be accommodated in the rectangular recess 4A provided in the flat yoke 4.
And magnetized so that the surface in contact with the bottom surface of the concave portion 4A becomes the S pole and the opposite surface becomes the N pole.

As described above, the concave portion 4A and the magnetic resistance adjusting portion 4B are provided in the flat yoke 4, and the rectangular permanent magnets 5 are arranged in the concave portion 4A so that the magnetization action and the magnetic resistance are asymmetric with respect to the center line X. By doing so, a monostable (single stable) state can be formed with a simple configuration.

The armature 6 is provided with a mountain-shaped convex portion 6C having an inclined portion at a portion in contact with the rectangular permanent magnet 5 on the center line X. 6A is in contact with the pole face 3a, and the end 6B is a thin film non-magnetic metal piece 7.
Through the magnetic pole surface 3b.

The thin-film non-magnetic metal piece 7 is formed by processing a thin plate-shaped non-magnetic metal piece of several tens of μm (for example, μm) into a substantially Z shape, and as shown in FIG. Is the pole face 3
b, and the other flat portion is sandwiched between the lower surface of the plate-shaped yoke 4 and the upper flat portion of the coil frame 2C to be in close contact.

Since the thin-film non-magnetic metal piece 7 is in close contact with the magnetic pole face 3b and the end face 6B of the armature 6 is in contact with the magnetic pole face 3b through the thin-film non-magnetic metal piece 7, the magnetic pole face 3a
The magnetic resistance on the magnetic pole face 3b side can be made larger than the contact between the magnetic pole face 3b and the end 6A.
And the magnetic resistance of the pole face 3b is set asymmetrically to form a monostable (single stable) state.

The magnetic resistance formed by the thin-film non-magnetic metal piece 7 can be changed by changing the area of one of the Z-shaped flat portions that is in close contact with a part or the whole of the pole face 3b.

To assemble the single-stable type polarized electromagnet 1, as shown in FIG. 3, the flat yoke 4 is pressed into the coil block 2 together with the thin-film non-magnetic metal piece 7 and fixed.
After the rectangular permanent magnet 5 is inserted into the recess 4A of the flat yoke 4, and the armature 6 is arranged on the rectangular permanent magnet 5, simple assembly in one direction becomes possible.

As is clear from the cross-sectional view of FIG.
In the single-stable type polarized electromagnet 1, the rectangular permanent magnet 5 is arranged so as to be deviated from the center line X toward the magnetic pole 3A, and the magnetic resistance adjusting portion 4B is formed on the flat pole yoke 4 on the magnetic pole 3B side. By providing the thin-film non-magnetic metal piece 7 in close contact with the magnetic pole surface 3b, the magnetoresistance on both sides becomes asymmetrical with respect to the cross section in which the center line X is lowered in the vertical direction, so that a stable single stable operation is achieved. It becomes possible.

Next, the operation of the single-stable type polarized electromagnet 1 according to the present invention will be described. FIG. 5 is an explanatory view of the operation of the single-stable type polarized electromagnet according to the present invention. 3A shows a non-excited stable state in which power is not applied to the coil block 2. The armature 6 has ends 6A and 6A.
B becomes both N poles due to the magnetizing action of the rectangular permanent magnet 5, while the magnetic pole 3A is always in the S pole and the magnetic pole 3B is in the N pole state from the above-described configuration, so that the armature 6 is in contact with the magnetic pole 3A side. It is in a stable state. In this state, the magnetic pole 3
A magnetic circuit is formed by a loop of A-plate-like yoke 4-rectangular permanent magnet 5-armature 6 (end 3A) -magnetic pole 3A, and magnetic flux Φ1 is generated in the direction of the arrow.

From the non-excitation state, as shown in FIG. 3B, immediately after the coil block 2 is energized by applying a power source having a predetermined polarity as shown in FIG.
Since A changes from the S pole to the N pole and the magnetic pole 3B changes from the N pole to the S pole, a repulsive force acts on the armature 6 and the magnetic pole 3A, and an attractive force acts on the armature 6 and the magnetic pole 3B. In this state, in addition to the magnetic flux Φ1 in FIG. 7A, a magnetic circuit is formed by a loop of the iron core 2B, the flat yoke 4-iron core 2B upon application of power, and the magnetic flux Φ2
Occurs.

FIG. 3C shows a reversal state in which the armature 6 is separated from the magnetic pole 3A side and comes into contact with the magnetic pole 3B side from the state shown in FIG. In this state, the magnetic poles 3B
-Plate yoke 4-Rectangular permanent magnet 5-Armature 6 (end 3
B)-A thin film non-magnetic metal piece 7-A magnetic circuit is formed by a loop of the magnetic pole surface 3b-a magnetic pole 3B to generate a magnetic flux Φ3, and an electromagnet causes an iron core 2B-a flat yoke 4-a rectangular permanent magnet. A magnetic circuit is formed by a loop consisting of 5-pole armature 6 (end 3B), thin-film non-magnetic metal piece 7, magnetic pole surface 3b, magnetic pole 3B, and iron core 2B to generate magnetic flux Φ4.

When the power supply is removed from this state, the magnetic resistance of the armature 6 on the magnetic pole 3B side (end 6B side) is larger than that on the magnetic pole 3A side (end 6A). Φ1) becomes larger than the magnetic flux Φ3, the armature 6 reverses, and the end 6A comes into contact with the magnetic pole 3A side to return to the non-excited state shown in FIG.

[0043]

As described above, in the single-stable type polarized electromagnet according to the present invention, a substantially Z-shaped thin-film non-magnetic metal piece is brought into close contact with one magnetic pole surface, and the one magnetic pole surface and the armature are connected to each other. Since a magnetic resistance can be formed asymmetrically by increasing the magnetic resistance between one ends, a monostable (single stable) state can be realized with a simple configuration.

Further, the single-stable type polarized electromagnet according to the present invention can be press-fitted together with the thin-film non-magnetic metal piece when the flat yoke is inserted between the opposed magnetic poles and fixed, so that it can be simply assembled with a simple assembly. A stable state can be configured.

Further, since the single-stable type polarized electromagnet according to the present invention uses a flat yoke and a rectangular permanent magnet which do not require alignment or adjustment, the workability in assembling can be improved.

Further, in the single-stable type polarized electromagnet according to the present invention, a magnetoresistive adjusting portion including a penetrating portion or a cutout for adjusting the magnetic resistance is formed simultaneously with the flat yoke at the time of forming the flat yoke. Is economical and monostable (single stable) without the need for parts or additional work
States can be configured.

Further, in the single-stable type polarized electromagnet according to the present invention, a mountain-shaped convex portion having an inclined portion is provided at a portion where the armature comes into contact with the permanent magnet, and the armature rotates about the mountain-shaped convex portion as a fulcrum. Since it is configured to move, a stable monostable operation can be realized.

Therefore, it is possible to provide a single-stable type polarized electromagnet having a simple structure, easy to assemble, and excellent in stability and economy.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a single-stable type polarized electromagnet according to the present invention.

FIG. 2 is a configuration diagram of an electromagnet block of a single-stable type polarized electromagnet according to the present invention.

FIG. 3 is an assembly diagram of a single-stable type polarized electromagnet according to the present invention.

FIG. 4 is a sectional view of a single-stable type polarized electromagnet according to the present invention.

FIG. 5 is a diagram illustrating the operation of the single-stable type polarized electromagnet according to the present invention.

FIG. 6 is a configuration diagram of an example of a conventional single-stable type polarized electromagnet.

FIG. 7 is a diagram illustrating the operation of a conventional single-stable type polarized electromagnet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Single stable type polarized electromagnet, 2 ... Coiled block, 2A ... Coil, 2B ... Iron core, 2C ... Coil frame, 2a, 2b ... Coil electrode, 3A, 3B ... Magnetic pole, 3
a, 3b: magnetic pole surface, 4: plate-like yoke, 4A: recess, 4B
... Magnetic resistance adjustment unit, 5 ... Rectangular permanent magnet, 6 ...
6A, 6B: end portion, 6C: mountain-shaped convex portion, 7: thin-film non-magnetic metal piece.

Claims (5)

(57) [Claims] 1. A coil block wound around a U-shaped iron core, opposing ends of which form magnetic poles, and a flat plate shaped to be inserted and fixed between the opposing magnetic poles to form a magnetic bypass circuit. A yoke and a permanent magnet attached to a concave portion provided in the plate-shaped yoke and magnetized to have different polarities in the thickness direction. The permanent magnet is brought into contact with the permanent magnet, and is rotated by the action of an electromagnet to contact the magnetic pole. A single-stable type polarized electromagnet provided with an armature to be inserted between one of the opposed magnetic poles and the flat yoke,
One surface is in close contact with one of the opposite magnetic pole surfaces,
A single-stable type polarized electromagnet, comprising: a substantially Z-shaped thin-film non-magnetic metal piece whose other surface is in close contact with the lower surface of the plate-shaped yoke. 2. The single-stable type polarizer according to claim 1, wherein when the flat yoke is inserted between the opposed magnetic poles and fixed, the yoke is pressed together with the thin-film non-magnetic metal piece. electromagnet. 3. The single-stable type according to claim 1, wherein a recess is formed in the plate-like yoke asymmetrically at a center line between the magnetic poles, and a rectangular permanent magnet is arranged in the recess. Polarized magnet. 4. A single-stable type polarized electromagnet according to claim 1, wherein a magnetic resistance adjusting portion for adjusting magnetic resistance is formed on said flat yoke. 5. The method according to claim 1, wherein a convex portion having an inclined portion is provided at a portion where the armature comes into contact with the permanent magnet, and the armature rotates with the convex portion as a fulcrum. Item 2. A single-stable type polarized electromagnet according to Item 1.