JP2634768B2 - 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 is a sectional view showing an example of a conventional single-stable type polarized electromagnet. A conventional single-stable type polarized electromagnet 11 is fixed between a magnetic block 13A and a magnetic pole 13B of an iron core 12B by assembling a coil block 12 formed by winding a coil 12A around a substantially U-shaped iron core 12B. It is composed of a mountain-shaped permanent magnet 14 and an armature 15 that rotates around a fulcrum 15A that is in contact with the peak of the mountain-shaped permanent magnet 14.

The armature 15 moves in a seesaw motion about a fulcrum 15A, and only when a power source having a predetermined polarity is applied to the coil block 12 does one of the magnetic poles (for example, the magnetic pole 1) move.
3A), the connection is switched to the other magnetic pole (for example, magnetic pole 13B), and when the power is removed, the connection returns to the original magnetic pole (for example, magnetic pole 13A).

[0004] Such a monostable (single stable)
In order to form the state, the mountain-shaped permanent magnet 14 has S poles at both ends in the longitudinal direction and N at a position at a predetermined distance x from the peak C of the mountain.
In order to maintain the positioning accuracy when the single-stable type polarized electromagnet 11 is magnetized by the poles, it is fixed between the magnetic poles 13A and 13B of the iron core 12B by laser welding or the like.

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. In FIG. 7, FIG. 7A shows a non-excitation stable state in which power is not applied to the coil block 12, and the armature 15 is in contact with the magnetic pole 13A.
In this state, a magnetic circuit having a loop formed by the magnetic pole 13A side of the iron core 12B, the mountain-shaped permanent magnet 14, the armature 15, and 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. 2B, the coil block 12 is formed with an electromagnet in which the magnetic pole 13A is magnetized to the N pole and the magnetic pole 13B is magnetized to the S pole. , A force corresponding to the product of the current I and the number of turns of the coil (the number of turns N) acts on the armature 15
The magnetic pole 13A side has the same pole (N pole) and a repulsive force, and the magnetic pole 13B side of the armature 15 has a different pole (S pole) and an attractive force. In this state, together with the magnetic flux Φa, the iron core 12B
-Mountain-shaped permanent magnet 14-Armature 15-Magnetic pole 1 of iron core 12B
3B side—A magnetic circuit is formed with the iron core 12B as a loop, and a magnetic flux Φb is generated in the direction of the arrow.

FIG. 3 (c) 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 drawing (b) changes to become a magnetic flux Φd, and the magnetic pole 13B side of the iron core 12B-the mountain-shaped permanent magnet 1
A magnetic circuit having a loop formed by the 4-pole armature 15 and 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 N pole of the mountain-shaped permanent magnet 14 is set so as to be biased toward the magnetic pole 13A.
A magnetic circuit is formed in which a loop is formed on the 3A side, the mountain-shaped permanent magnet 14, the armature 15, and the magnetic pole 13A side of the iron core 12B.
(A) A magnetic flux Φa as shown in the figure is generated in the direction of the arrow, and the armature 15 is returned from the magnetic pole 13B side to the magnetic pole 13A side to be in a monostable state.

As described above, since the conventional single-stable type polarized electromagnet 11 performs a monostable operation, a movable contact (not shown) is mounted on the armature 15 and a fixed contact (not shown).
A single stable type relay is configured by performing mechanical intermittent connection between the relay and the relay.

[0010]

The conventional single-stable type polarized electromagnet 11 has a permanent magnet 14 as a permanent magnet.
Is used to rotate around the fulcrum 15A of the armature 15 in contact with the apex of the mountain-shaped permanent magnet 14, so that the dimensions of the mountain-shaped permanent magnet 14 are required to be accurate and the shape becomes complicated. There is a problem that raises costs.

Further, in order to magnetize a position deviated by x from the center of the mountain-shaped permanent magnet 14 or to maintain an appropriate positional relationship between the mountain-shaped permanent magnet 14 and the armature 15, the mountain-shaped permanent magnet 14 is made of an iron core. It is required to fix the magnetic poles 13A and 13B between the magnetic poles 13A and 13B by laser welding or the like, and there is a problem that adjustment and assembly are complicated.

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 which has a simple structure and is easy to assemble.

[0013]

According to the present invention, there is provided a bypass block for a single-stable type polarized electromagnet according to the present invention, comprising: a flat yoke having a recess for mounting a permanent magnet; It is formed from a plate-shaped non-magnetic material that is bonded to the surface, and fixed by bringing a plate-shaped yoke into contact with one of the opposed magnetic poles, and contacting and fixing the plate-shaped non-magnetic material with the other of the opposed magnetic poles. Features.

Further, the single-stable type polarized electromagnet according to the present invention is characterized in that the flat non-magnetic material is formed of a non-magnetic metal or a mold resin.

Further, the single-stable type polarized electromagnet according to the present invention is characterized in that a simple rectangular permanent magnet is used as the permanent magnet.

In the single-stable type polarized electromagnet according to the present invention, the portion where the armature contacts the permanent magnet is
A mountain-shaped convex portion having an inclined portion is provided, and the armature rotates with the mountain-shaped convex portion as a fulcrum.

Further, the single-stable type polarized electromagnet according to the present invention is characterized in that, when the bypass block is inserted between the opposed magnetic poles and fixed, press-fitting is performed.

[0018]

The bypass block of the single-stable type polarized electromagnet according to the present invention comprises: a flat yoke having a concave portion;
Formed from a plate-shaped non-magnetic material coupled to the plate-shaped yoke, fixed by contacting the plate-shaped yoke with one of the opposed magnetic poles, and contacting the plate-shaped non-magnetic material with the other of the opposed magnetic poles Since it is fixed, a monostable state can be realized with a simple structure.

Further, in the single-stable type polarized electromagnet according to the present invention, since a rectangular permanent magnet is used as the permanent magnet, there is no need for alignment and adjustment.

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.

Further, the single-stable type polarized electromagnet according to the present invention uses the bypass block and the rectangular permanent magnet which do not need to be aligned or adjusted, so that the bypass block is inserted between the opposed magnetic poles and fixed. , Can be performed by press fitting.

[0022]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 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 an assembly diagram of the single-stable type polarized electromagnet according to the present invention, and FIG. 3 is a sectional view of the single-stable type polarized electromagnet according to the present invention.

1 to 3, a single-stable type polarized electromagnet 1 includes a substantially U-shaped iron core 2B and a coil 2A.
Is inserted between and fixed to the magnetic poles 3A and 3B of the coil block 2, and a magnetic bypass circuit is formed between the coil block 2 and the iron core 2B, and the flat yoke 4A and the flat nonmagnetic material 4B A bypass block 4 provided with: a rectangular permanent magnet 5 disposed in a concave portion 4a provided on a flat yoke 4A at the center of the bypass block 4; The end 6A and the end 6B are respectively composed of the magnetic pole 3A and the armature 6 of the iron core 2B which come into contact with the magnetic pole 3B.

The coil block 2 forms an electromagnet, and applies a power source whose polarity is determined in advance between the power terminals 2a and 2b, so that the magnetic pole 3A corresponding to the direction of the current flowing through the coil 2A (right thumb rule). , 3B polarity (N, S
Pole), while the number of turns of the coil 2A and the coil 2A
Generates a magnetic flux that is proportional to the product of the current values flowing through the magnetic circuit (magnetomotive force) and inversely proportional to the resistance (magnetic resistance) of the magnetic circuit.

As shown in FIG. 2, the bypass block 4 has a concave portion 4a provided symmetrically with respect to the center line X, and has a flat yoke 4A formed of a magnetic material and a flat yoke 4A. It is composed of a plate-shaped non-magnetic member 4B formed of a non-magnetic metal or a mold resin, and is connected to one end 3A of the magnetic pole facing the plate-shaped yoke 4A and the plate-shaped non-magnetic member 4B. The other end 3B of the magnetic pole is press-fitted and fixed.

FIG. 4 shows another embodiment of the bypass block of the single-stable type polarized electromagnet according to the present invention. In the figure, a bypass block 7 is formed of a flat yoke 7A having a concave portion 7a formed asymmetrically with respect to the center line X, and a non-magnetic metal or a mold resin which is connected to the flat yoke 7A by a connecting portion 7b. And a flat non-magnetic body 7B.

As described above, one side of the bypass block 4 is formed of the plate-like yoke 4A having a small magnetic resistance and the other side is formed of the plate-shaped non-magnetic material 4B having an extremely large magnetic resistance. In the non-excited state when the type polarized electromagnet 1 is formed, a magnetic circuit is formed by the rectangular permanent magnet 5 so that the armature 6 always contacts the magnetic pole 3A, and the monostable state is formed stably.

The rectangular permanent magnet 5 is configured in accordance with the shape of the concave portion 4a so as to be accommodated in the concave portion 4a provided in the flat yoke 4, and the surface side in contact with the bottom surface of the concave portion 4a has an S pole, It is magnetized so that the opposite surface side becomes the N pole.

As shown in FIG. 3, 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, and this mountain-shaped convex portion 6C is used as a fulcrum. Since the armature 6 is configured to rotate and the end 6A and the end 6B contact the magnetic pole 3A and the magnetic pole 3B, stable rotational movement is obtained.

As shown in FIG. 2, the single-stable type polarized electromagnet 1 is assembled by press-fitting the bypass block 4 into the coil block 2 and inserting the rectangular permanent magnet 5 into the recess 4 a of the bypass block 4. By arranging the armature 6 on the rectangular permanent magnet 5, simple one-way assembly becomes possible.

As is clear from the sectional view of FIG.
The single-stable type polarized electromagnet 1 can perform a single-stable operation by forming an asymmetrical magnetic circuit on both sides with respect to a cross section in which the center line X is lowered vertically.

Next, the operation of the single-stable type polarized electromagnet 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.
In the drawing, the plate-like non-magnetic member 4B having a very large magnetic resistance and not forming a magnetic circuit is indicated by hatching. 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 an N-pole 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-described configuration, so that the armature 6 contacts the magnetic pole 3A. 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 4A-rectangular permanent magnet 5-armature 6-magnetic pole 3A, and magnetic flux Φ1 is generated in the direction of the arrow.

From the non-excitation state, as shown in FIG. 3 (b), immediately after the power supply whose polarity is determined in advance is applied to the coil block 2, as shown in FIG. Since the pole and the magnetic pole 3B change from the N pole to the S pole, the repulsive force and the armature 6 are applied to the armature 6 and the magnetic pole 3A.
Attraction force acts on the magnetic pole 3B. In this state,
(A) In addition to magnetic flux Φ1 in the figure, iron core 2B
Flat yoke 4A-rectangular permanent magnet 5-armature 6-end 6
A magnetic circuit is formed by the gap between B and the magnetic pole 3B-the loop of the iron core 2B, and a magnetic flux Φ2 is generated.

FIG. 3C shows an inverted state in which the armature 6 separates from the magnetic pole 3A side and comes into contact with the magnetic pole 3B side from the state of FIG. In this state, the electromagnet forms a magnetic circuit with a loop of the iron core 2B, the flat yoke 4A, the rectangular permanent magnet 5, the armature 6, the end 6B, the magnetic pole 3B, and the iron core 2B. Magnetic flux Φ3 is generated.

When the power source is removed from this state, the magnetic resistance on the side of the non-magnetic plate 4B is very high, so that the state shown in FIG.
Due to the magnetic circuit formed on the side, the magnetic flux due to the magnetic force of the rectangular permanent magnet 5 becomes larger than the magnetic fluxes Φ2 and Φ3,
The armature 6 returns to the magnetic pole 3A side and maintains a monostable state.

[0036]

As described above, the bypass block of the single-stable type polarized electromagnet according to the present invention is formed of a flat yoke having a concave portion and a flat non-magnetic material coupled to the flat yoke. , A flat yoke is brought into contact with one of the opposing magnetic poles and fixed, and a flat non-magnetic material is brought into contact with and fixed to the other of the opposing magnetic poles, eliminating the need for alignment and adjustment. Performance can be stabilized.

Further, the single-stable type polarized electromagnet according to the present invention uses a bypass block and a rectangular permanent magnet which do not require alignment or adjustment, and is press-fitted when the bypass block is inserted between the opposed magnetic poles and fixed. Therefore, assembling workability can be improved.

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. Since it is configured to move, a stable monostable operation can be realized.

Accordingly, it is possible to provide a single-stable type polarized electromagnet which is excellent in economic efficiency and performance stability.

[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 an assembly view of a single-stable type polarized electromagnet according to the present invention.

FIG. 3 is a sectional view of a single-stable type polarized electromagnet according to the present invention.

FIG. 4 shows another embodiment of the bypass block of the 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 sectional view 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 ... Coil block, 2A ... Coil, 2B ... Iron core, 2a, 2b ... Power supply terminal, 3A, 3B ... Magnetic pole, 4, 7 ... Bypass block, 4
A, 7A: Plate yoke, 4a, 7a: recess, 4B, 7B
... flat non-magnetic material, 5 ... rectangular permanent magnet, 6 ... armature,
6A, 6B: end portion, 6C: mountain-shaped convex portion.

Claims (5)

(57) [Claims] A coil is wound around a U-shaped iron core. Opposite ends of the iron core form a magnetic pole, and a coil block is inserted and fixed between the opposing magnetic poles to form a magnetic bypass circuit. A bypass block to be formed, a permanent magnet mounted in a recess provided in the bypass block, and magnetized with a polarity different from each other in the thickness direction; and a contact with the permanent magnet, and a rotational motion by the action of an electromagnet to contact the magnetic pole. A single-stable type polarized electromagnet having an armature to be mounted, wherein the bypass block has a flat yoke having a concave portion for mounting the permanent magnet, and a flat nonmagnetic material coupled to the flat yoke. And fixing the plate-shaped yoke in contact with one of the opposed magnetic poles, and fixing the plate-shaped non-magnetic material in contact with the other of the opposed magnetic poles. Single-stable type polarized electromagnet to. 2. The single-stable type polarized electromagnet according to claim 1, wherein said plate-shaped non-magnetic material is formed of a non-magnetic metal or a mold resin. 3. The single-stable type polarized electromagnet according to claim 1, wherein a simple rectangular permanent magnet is used as said permanent magnet. 4. The method according to claim 1, wherein 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 by using the mountain-shaped convex portion as a fulcrum. Item 2. A single-stable type polarized electromagnet according to Item 1. 5. The single-stable type polarized electromagnet, wherein the bypass block is inserted between the opposed magnetic poles and fixed by press-fitting.