JPH0896685A - Turning supporting point type polarized electromagnet - Google Patents

Abstract

PURPOSE: To simplify a shape by forming a recessed portion in a flat plate-like yoke, forming a projecting portion in this recessed portion, forming a recessed portion on an armature face opposite to this recessed portion, and arranging a permanent magnet in this recessed portion. CONSTITUTION: A recessed portion 4A is asymmetrically formed on the center line of a flat plate-like yoke 4, and a projecting portion 4C is formed in the recessed portion 4A. A magnetic resistance adjusting portion 4B made of a cut-out hole is formed on the yoke 4. A recessed portion 6C is formed on the lower face of an armature 6 opposite to the recessed portion 4A, and the flat plate-like yoke 4 is fixed thereto. Accordingly, the armature 6 performs turning movement taking the projecting portion 4C as a supporting point, and a monostable state is surely realized so that end portions 6A, 6B respectively contact magnetic poles 3A, 3B. A rectangular permanent magnet 5 is formed so as to coincide with the shape of the recessed portion 4A. The recessed portion 6C is formed on the armature 6, and the flat plate-like yoke 4 is fixed thereto. Accordingly, the armature 6 can perform the stable turning movement taking the projecting portion 4C as the supporting point.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art FIG. 5 shows a sectional view of a single-stable polar electromagnet as an example of a conventional rotary fulcrum polar electromagnet. The conventional single-stable polarized electromagnet 11 is fixed to the coil block 12 assembled by winding a coil 12A around an approximately U-shaped iron core 12B and the magnetic poles 13A and 13B of the iron core 12B by laser welding or the like. Mountain-shaped permanent magnet 1
4 and the armature 15 that rotates about a fulcrum 15A that is in contact with the apex of the mountain-shaped permanent magnet 14.

The armature 15 makes a seesaw motion about a fulcrum 15A, and only when a power source having a predetermined polarity is applied to the coil block 12 from one magnetic pole (for example, magnetic pole 13A) to the other magnetic pole (for example, magnetic pole 13A). , The magnetic pole 13B) is switched to return to the original magnetic pole (for example, magnetic pole 13A) side when the power is removed.

Such a stable (single stable)
In order to configure the state, the mountain-shaped permanent magnet 14 has S poles at both ends in the longitudinal direction, and has an N position at a predetermined distance x from the mountain-shaped apex C.
In order to maintain the arrangement accuracy when the single-stable polarized electromagnet 11 is magnetized to the poles, it is fixed between the magnetic poles 13A and 13B by laser welding or the like.

Next, the single-stable operation of the conventional single-stable polarized electromagnet 11 will be described with reference to FIG. FIG. 6A shows a non-excitation stable state in which no power is applied to the coil block 12, and the armature 15 is
It is in contact with the magnetic pole 13A. In this state, the magnetic pole 13A side of the iron core 12B-mountain type permanent magnet 14-armature 15
—A magnetic circuit having a loop on the magnetic pole 13A side of the iron core 12B is formed, and the magnetic flux Φa is generated in the direction of the arrow.

Immediately after the power is applied to the coil block 12 from the non-excited state as shown in FIG. 3B, the coil block 12 is formed with an electromagnet magnetized to have an N pole on the magnetic pole 13A side and an S pole on the magnetic pole 13B side. Then, a force corresponding to the product of the current I and the number of turns of the coil (the number of turns N) acts, and the armature 1
5 has the same pole (N pole) on the magnetic pole 13A side, repulsive force, and armature 15
The attraction force acts on the magnetic pole 13B side of each of the different poles (S pole). In this state, together with the magnetic flux Φa, the iron core 12
A magnetic circuit having B-mountain type permanent magnet 14-armature 15-magnetic pole 13B side of iron core 12B-iron core 12B as a loop is formed, and magnetic flux Φb is generated in the direction of the arrow.

FIG. 3C shows an inverted state in which the armature 15 is separated from the magnetic pole 13A side and comes into contact with the magnetic pole 13B side from FIG. In this state, since the armature 15 and the magnetic pole 13B are in contact with each other, the magnetic flux Φb in the same figure (b) changes to become the magnetic flux Φd, and the magnetic pole 13B side of the iron core 12B-the mountain-shaped permanent magnet 14-the armature 15 —A magnetic circuit having a loop on the magnetic pole 13B side of the iron core 12B is formed, and a magnetic flux Φc is generated in the direction of the arrow.

When the power source is removed from this state, the magnetic pole 1 of the iron core 12B is set in the same manner as in the first state because the N pole of the mountain-shaped permanent magnet 14 is set to be biased toward the magnetic pole 13A.
3A side-mountain type permanent magnet 14-armature 15-a magnetic circuit having a magnetic pole 13A side of the iron core 12B as a loop is formed, a magnetic flux Φa is generated in the direction of the arrow, and the armature 15 has a magnetic pole 13B.
From the side to the magnetic pole 13A side, and the monostable state is established.

As described above, since the conventional single-stable polarized electromagnet 11 operates monostable, a movable contact (not shown) is mounted on the armature 15 and a fixed contact (not shown).
A single stable relay is configured by mechanically connecting and disconnecting with.

[0010]

A conventional rotary fulcrum type polar electromagnet is constructed by using a mountain-shaped permanent magnet 14 as a permanent magnet and rotating around a fulcrum 15A of an armature 15 which is in contact with the apex of the mountain-shaped permanent magnet 14. Since it is configured to move, the mountain-shaped permanent magnet 14 is required to have a high degree of precision in its shape, its shape is complicated, and fixing between both magnetic poles is required by laser welding or the like, resulting in an extremely high cost. Was becoming. further,
In the case of the above-mentioned single-stable polarized electromagnet,
Since the magnetization of the magnet is eccentric, it is difficult to adjust the rotation fulcrum type polarized electromagnet to the optimum magnetization.

The present invention has been made to solve the above problems, and an object thereof is to provide a rotary fulcrum type polarized electromagnet having a simple structure in which a permanent magnet is fixed to an armature. is there.

[0012]

In order to solve the above-mentioned problems, a rotary fulcrum type polarized electromagnet according to the present invention has a flat yoke.
A concave portion is formed asymmetrically on the center line between the magnetic poles, a convex portion serving as a fulcrum of rotation is formed in the concave portion, and a concave portion is formed on an armature surface facing the concave portion. It is characterized by being fixed.

Further, in the rotary fulcrum type polarized electromagnet according to the present invention, concave portions are formed in the plate yoke symmetrically with respect to the center line between the magnetic poles, and the convex portions serving as the rotational fulcrums are formed in the concave portions. At the same time, a recess is formed on the armature surface facing the recess,
The permanent magnet is fixed to the recess.

Further, in the rotary fulcrum type electromagnet according to the present invention, when the flat plate yoke is inserted and fixed between the opposing magnetic poles, the flat plate yoke is provided inside the U-shaped iron core and in the coil. It is characterized in that it is press-fitted and fixed in the concave portion of the frame.

[0015]

The rotary fulcrum type polarized electromagnet according to the present invention comprises a flat yoke and a simple permanent magnet instead of the mountain permanent magnet, and the flat yoke has an asymmetric recess in the center line between the magnetic poles. Since the protrusion is formed in this recess and serves as a fulcrum of rotation, the recess is formed in the armature surface facing the recess of the plate yoke, and the permanent magnet is arranged in this recess. The precision is not required, and the shape can be simplified.

The rotary fulcrum type polarized electromagnet according to the present invention is provided with a flat yoke and a simple permanent magnet instead of the mountain permanent magnet, and the flat yoke is symmetrical about the center line between the magnetic poles. A concave portion is formed, and a convex portion serving as a rotation fulcrum is formed in the concave portion,
Form a recess on the armature surface facing the recess of the flat yoke,
Since the permanent magnet is arranged in this recess, the dimension of the permanent magnet is not required to be accurate, and the shape can be simplified.

Further, in the rotary fulcrum type polarized electromagnet according to the present invention, it is not necessary to fix the permanent magnet between the magnetic poles by laser welding or the like, and electromagnetic soft iron or the like is provided inside the U-shaped iron core and in the coil frame. It is only necessary to press-fit and fix it in the recess.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the configuration of a single-stable polar electromagnet as an example of a rotary fulcrum type polar electromagnet according to the present invention. FIG. 1 shows a cross-sectional view of this single-stable polarized electromagnet.

In FIG. 1, a single-stable polar electromagnet 1 is a coil block 2 in which a coil 2A is wound around an approximately U-shaped iron core 2B, a magnetic pole 3A of the coil block 2,
The plate-shaped yoke 4 which forms a magnetic circuit with the iron core 2B and is fixed in the recess of the coil frame 2C between 3B and the plate-shaped yoke 4 is provided at a position deviated from the central portion. Recess 4A
And the rectangular permanent magnet 5 arranged in the above, and an armature 6 having an end portion 6A and an end portion 6B which are in contact with the magnetic poles 3A and 3B, respectively.
And

The coil block 2 forms an electromagnet, and a power source having a predetermined polarity is applied between power source terminals connected to the coil 2A to correspond to the direction of the current flowing through the coil 2A (right thumb rule). The polarities (N and S poles) of the magnetic poles 3A and 3B are set, while they are proportional to the product of the number of turns of the coil 2A and the current value flowing in the coil 2A (magnetomotive force) and inversely proportional to the resistance of the magnetic circuit (magnetic resistance). Generates magnetic flux.

The flat yoke 4 has a recess 4A formed asymmetrically in the center line between the magnetic poles 3A and 3B of the coil block 2 and has a rectangular permanent shape in a non-excited state when the rectangular permanent magnet 5 is housed. The magnetic circuit formed by the magnetic force of the magnet 5 is always biased toward the magnetic pole 3A. Further, the flat yoke 4 has a convex portion 4C formed in the concave portion 4A so that the concave portion 4A has a mountain-shaped cross section.

Further, the flat yoke 4 has a magnetic resistance adjusting portion 4B having notches or holes for increasing the magnetic resistance on the side where the volume of the recess 4A is small with the center line as the center. The magnetic resistance adjusting portion 4B is formed to increase the magnetic resistance, the concave portion 4A is formed asymmetrically with respect to the center line, and the rectangular permanent magnets 5 are arranged so as to be biased. The monostable state of contacting with is reliably achieved.

The rectangular permanent magnet 5 is constructed in accordance with the shape of the recess 4A so as to be housed in the recess 4A provided in the flat yoke 4, and the surface side in contact with the bottom surface of the recess 4A is the S pole, Magnetize so that the opposite surface side becomes the N pole.

The armature 6 has a recess 6C formed on the lower surface facing the recess 4A, and the flat yoke 4 is fixed thereto.
Therefore, the armature 6 rotates about the convex portion 4C as a fulcrum, and the end portion 6A and the end portion 6B respectively have the magnetic pole 3A and the magnetic pole 3.
Since it comes into contact with B, a stable rotary motion is obtained.

Further, as is apparent from the figure, the single-stable polar electromagnet 1 has an asymmetrical structure on both sides with respect to the cross section passing through the center line, so that single-stable operation is possible.

Next, the operation of the single-stable polarized electromagnet according to the present invention will be described. FIG. 2 is a diagram for explaining the operation of this single-stable type polarized electromagnet. FIG. 2 (a) shows a stable state in which no power is applied to the coil block 2 and the armature 6 has ends 6A and 6B. Are both N poles depending on the magnetization state 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-mentioned configuration, so that the armature 6 is in stable contact with the magnetic pole 3A side. It is in a state. In this state, a magnetic circuit is formed by the loop of the magnetic pole 3A, the flat plate yoke 4, the rectangular permanent magnet 5, the armature 6 and the magnetic pole 3A, and the magnetic flux Φ1 is generated in the direction of the arrow.

Immediately after excitation from a non-excited state in which a power source having a predetermined polarity is applied to the coil block 2 as shown in FIG. 2B, the electromagnet constituted by the coil block 2 has, for example, a magnetic pole 3A starting from an S pole. Since the N pole and the magnetic pole 3B change from the N pole to the S pole, repulsive force acts on the armature 6 and the magnetic pole 3A, and attractive force acts on the armature 6 and the magnetic pole 3B. In this state, in addition to the magnetic flux Φ1 in FIG.
A magnetic circuit is formed by the loop of the flat yoke 4-iron core 2B, and a magnetic flux Φ2 is generated.

FIG. 6C shows an inverted 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 rectangular permanent magnet 5 causes the magnetic pole 3
A magnetic circuit is formed by a loop of B-plate-like yoke 4-rectangular permanent magnet 5-armature 6-pole 3B, and magnetic flux Φ3 is generated, and an electromagnet causes iron core 2B-plate-like yoke 4-
A magnetic circuit is formed by the loop of the rectangular permanent magnet 5-the armature 6-the magnetic pole 3B-the iron core 2B, and the magnetic flux Φ4 is generated.

If the power source is removed from this state, the flat plate yoke 4
The magnetic resistance on the magnetic pole 3B side is larger than that on the magnetic pole 3A side, and since the rectangular permanent magnets 5 are arranged biased toward the magnetic pole 3A side, the magnetic flux generated by the magnetic force of the rectangular permanent magnet 5 is the magnetic flux Φ.
3, the armature 6 contacts the side of the magnetic pole 3A and maintains a monostable state.

Next, a latching type polarized electromagnet will be described as an example of the rotary fulcrum type polarized electromagnet. FIG. 3 is a cross-sectional view of this latching type polarized electromagnet. The same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In this latching type polarized electromagnet 21, only the concave portion 4A symmetrical to the center line between the magnetic poles 3A and 3B is formed in the flat yoke 4 and the convex portion 4C serving as a rotation fulcrum is formed in the concave portion 4A. Form. Further, the rectangular permanent magnet 5 is fixed to the concave portion 6C formed on the lower surface of the armature 6 facing the concave portion 4A.

The operation of this latching type polarized electromagnet will be described. FIG. 4 shows an operation explanatory view of this latching type polarized electromagnet, FIG. 4A shows a non-exciting latching state in which no power is applied to the coil block 2, and the armature 6 has ends 6A and 6B. Depending on the magnetization state of the rectangular permanent magnet 5, both are N poles, while the magnetic pole 3A is S pole and the magnetic pole 3B is N pole.
Since it is in the pole state, the armature 6 is in the latching state in contact with the magnetic pole 3A side. In this state, the magnetic pole 3A
-Flat yoke 4-Rectangular permanent magnet 5-Armor 6-Magnetic pole 3
A magnetic circuit is formed by the loop of A, and the magnetic flux Φ1 is generated in the direction of the arrow.

Immediately after excitation from a non-excited state in which a power source whose polarity has been determined in advance is applied to the coil block 2 as shown in FIG. 3B, the electromagnet constituted by the coil block 2 has, for example, the magnetic pole 3A starting from the S pole. Since the N pole and the magnetic pole 3B change from the N pole to the S pole, repulsive force acts on the armature 6 and the magnetic pole 3A, and attractive force acts on the armature 6 and the magnetic pole 3B. In this state, in addition to the magnetic flux Φ1 in FIG.
A magnetic circuit is formed by the loop of the flat yoke 4-iron core 2B, and a magnetic flux Φ2 is generated.

FIG. 6C shows an inverted state in which the armature 6 is separated from the magnetic pole 3A side and is in contact with the magnetic pole 3B side from the state (b). In this state, the rectangular permanent magnet 5 causes the magnetic pole 3B to
-Flat yoke 4-Rectangular permanent magnet 5-Armor 6-Magnetic pole 3
A magnetic circuit is formed by the loop of B and magnetic flux Φ3 is generated, and the electromagnet causes the magnetic flux to be generated by the loop of iron core 2B-flat plate yoke 4-rectangular permanent magnet 5-armature 6-magnetic pole 3B-iron core 2B. A circuit is formed and a magnetic flux Φ4 is generated.

FIG. 5D shows a non-excitation state in which the power source is removed from the state of FIG. Since the magnetic resistances of the flat yoke 4 on the magnetic pole 3B side and the magnetic pole 3A side are equal, and the rectangular permanent magnet 5 is arranged between the magnetic poles 3A and 3B, the armature 6 contacts the magnetic pole 3B side. It is in the latching state. In this state, a magnetic circuit is formed by the loop of the magnetic pole 3B, the flat plate yoke 4, the rectangular permanent magnet 5, the armature 6 and the magnetic pole 3B, and the magnetic flux Φ1 is generated in the direction of the arrow.

[0036]

As described above, in the rotary fulcrum type electromagnet according to the present invention, a concave portion is formed asymmetrically in the center line between the magnetic poles in the flat yoke, and the rotary fulcrum is formed in the concave portion. Since the convex portion is formed, the concave portion is formed on the armature surface facing the concave portion, and the permanent magnet is arranged in the concave portion, the dimension of the permanent magnet is not required to be precise, and the shape can be simplified. Therefore, the entire structure is simple, the optimum magnetization can be easily adjusted, and the cost can be reduced.

Further, in the rotary fulcrum type polar electromagnet according to the present invention, a concave portion is formed asymmetrically in the center line between the magnetic poles in the plate yoke, and a convex portion serving as a rotational fulcrum is formed in the concave portion. At the same time, since the concave portion is formed on the armature surface facing the concave portion and the permanent magnet is arranged in this concave portion, the dimension of the permanent magnet is not required to be precise, and the shape can be simplified. Therefore, the entire structure is simplified and the cost can be reduced.

Further, in the rotary fulcrum type electromagnet according to the present invention, when the flat plate yoke is inserted and fixed between the opposed magnetic poles, the flat plate yoke is provided inside the U-shaped iron core and in the coil. Since it is press-fitted and fixed in the recessed part of the frame, it is not necessary to fix the permanent magnet between the magnetic poles by laser welding etc., only electromagnetic soft iron etc. need to be fixed, very low cost in terms of equipment, and assembly workability is also improved. To do.

[Brief description of drawings]

FIG. 1 is a sectional view of a single-stable polar electromagnet as an example of a rotary fulcrum polar electromagnet according to the present invention.

FIG. 2 is an operation explanatory diagram of a single-stable polarized electromagnet.

FIG. 3 is a sectional view of a latching type polarized electromagnet as an example of a rotary fulcrum type polarized electromagnet according to the present invention.

FIG. 4 is an operation explanatory view of a latching type polarized electromagnet.

FIG. 5 is a sectional view of a single-stable polar electromagnet as an example of a conventional rotary fulcrum polar electromagnet.

FIG. 6 is an operation explanatory view of a conventional single-stable polarized electromagnet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Single-stable polar electromagnet, 2 ... Coil il block, 2A ... Coil, 2B ... Iron core, 3A, 3B ... Magnetic pole, 4 ... Plate yoke, 4A ... Recess, 4B ... Magnetic resistance adjustment part, 4C ... Convex portion, 5 ... Rectangular permanent magnet, 6 ... Armature, 6
A, 6B ... end portion, 6C ... convex portion.

Claims (3)

[Claims] 1. A coil block in which a coil is wound on a U-shaped iron core and opposite ends of which form a magnetic pole, and a flat plate shape which is fixed by being inserted between the opposite magnetic poles to form a magnetic bypass circuit. A yoke, a permanent magnet mounted in a recess provided in the flat yoke and magnetized with different polarities in the thickness direction, and contacting the permanent magnet to rotate by the action of an electromagnet to contact the magnetic pole. In the rotary fulcrum type polarized electromagnet including the armature, a concave portion is formed asymmetrically in the center line between the magnetic poles in the flat yoke, and a convex portion serving as a rotational fulcrum is formed in the concave portion. A rotary fulcrum type polarized electromagnet, wherein a concave portion is formed on an armature surface facing the concave portion, and the permanent magnet is fixed to the concave portion. 2. A coil block in which a coil is wound around a U-shaped iron core and opposite ends of which form magnetic poles, and a flat plate shape which is inserted and fixed between the opposing magnetic poles to form a magnetic bypass circuit. A yoke, a permanent magnet mounted in a recess provided in the flat yoke and magnetized with different polarities in the thickness direction, and contacting the permanent magnet to rotate by the action of an electromagnet to contact the magnetic pole. In the rotary fulcrum type polarized electromagnet including the armature, a concave portion is formed in the flat plate yoke symmetrically with the center line between the magnetic poles, and a convex portion serving as a rotational fulcrum is formed in the concave portion. A rotary fulcrum type polarized electromagnet, wherein a concave portion is formed on an armature surface facing the concave portion, and the permanent magnet is fixed to the concave portion. 3. The rotary fulcrum type polar electromagnet according to claim 1 or 2, wherein the flat plate yoke is press-fitted and fixed inside the U-shaped iron core and in the recess of the coil frame. A rotating fulcrum type polar magnet.