JP6307421B2 - Bistable moving device - Google Patents

Description

  The present invention relates to a bistable moving device that moves a mover between two positions by electromagnetically rotating the rotor by means of a rotor rotating means, and holds the mover at either position.

  Conventionally, this type of bistable moving device has a mechanism that allows the mover to move between two positions and holds it in either position for various applications such as shut-off valves, electromagnetic switches, and electronic locks. Bistable latch type solenoids are used.

  For example, as a bistable linear electromagnetic solenoid in Patent Document 1 and as a solenoid actuator in Patent Document 2, a plunger (movable element) fixed to a nonmagnetic shaft that can move in the axial direction has an axial direction across the plunger. It is configured to be latched by one of a set of permanent magnets (stator) having a fixed core placed symmetrically to each other, and movement to the other end is arranged symmetrically in the axial direction surrounding them. Also disclosed is a bistable moving device that uses a set of exciting coils.

  In Patent Document 1 and Patent Document 2, the mover is an iron core and a magnet is arranged on the stator. On the other hand, for example, the bidirectional latching solenoid shown in Patent Document 3 is a mover. Is a magnet and the stator is composed only of an iron core, but in any case, the conventional bistable moving device has a structure in which either the mover or the stator is an iron core (magnetic material) and the other is a magnet. It is said that.

  However, in the conventional bistable latch type solenoid described above, since either the mover or the stator is an iron core (magnetic material) and the other is a magnet, it is latched on either side by the excitation current OFF. If it is in a state where it has been moved in the other direction due to an impact or excessive force in the other direction, it will be latched in the other direction, resulting in a serious malfunction.

  In response to this problem, the inventor has applied the impact to the other direction or temporary excessive force on the mover, and even if the mover moves in the other direction, the mover is latched in the other direction. A bistable movement device that has a function of automatically returning the movable element to the latch in the original direction and capable of obtaining a reliable operation with high safety has been proposed (Patent Document 4). See -5).

JP-A-8-288129 JP-A-7-335434 JP 2010-98037 A Japanese Patent Application No. 2013-083996 Japanese Patent Application No. 2013-185925

In such a bistable moving device, a permanent magnet used as a mover is fixed to a movable body including two movers so as not to move linearly in the direction of the movable axis and to rotate around the movable axis. There is a need to.
At this time, as a method of fixing the permanent magnet serving as the mover, a method of fixing using the outer peripheral surface of the permanent magnet is conceivable. However, it is necessary to increase the clearance between the outer peripheral surface of the permanent magnet serving as the mover and the inner peripheral surface of the permanent magnet of the rotor for fixing, and this causes a problem that the generated magnetic force decreases. This is because the magnetic force generated between the permanent magnets is inversely proportional to the square of the distance between them. In addition, it is preferable to use a sintered magnet to increase the magnetic force per volume of the permanent magnet. However, since the sintered magnet has a low strength and cannot apply an excessive force, it is mechanical such as screwing or press fitting. It is difficult to fix.

  Therefore, in a conventional bistable moving device, a method of fixing a permanent magnet serving as a mover by adhesion or resin molding has been common. However, in the case of the method of fixing the permanent magnet by bonding, it is difficult to control the application state of the adhesive, it is difficult to inspect the adhesive strength, and there are also concerns about environmental resistance and long-term reliability. was there. Also, in the case of the method of fixing the permanent magnet with a resin mold, the permanent magnet is exposed to high heat, so that there is a problem that it is necessary to individually magnetize the mold after molding, which increases the number of processes.

  The present invention is for solving such problems, and provides a structure capable of fixing a permanent magnet as a mover without using an adhesive or a mold while suppressing a decrease in magnetic force generated from the permanent magnet. The purpose is to do.

  In order to achieve such an object, a bistable movement device according to the present invention is held so as to be movable in the direction of a movable shaft that is the axial direction of the movable shaft, and sandwiches the movable shaft in a direction orthogonal to the movable shaft. A cylindrical or ring-shaped first permanent magnet having a pair of magnetic poles arranged in this manner and held so as to be movable in the direction of the movable axis, and sandwiching the movable axis in a direction perpendicular to the movable axis And a cylindrical or ring-shaped second permanent magnet in which a pair of magnetic poles are arranged so that the different poles face each other in the direction of the movable axis with respect to the magnetic pole of the first permanent magnet. A movable element that is rotatable about the movable axis and is held so as to prevent movement in the direction of the movable axis, and the position of one of the magnetic poles is on the first circumference around the movable axis And the position of the other magnetic pole is larger in diameter than the first circumference. A rotor provided with a permanent magnet in which two magnetic pole pairs on the second circumference centered on the movable axis are arranged so as to sandwich the movable element in a direction perpendicular to the movable axis, and the rotor Rotor rotation means for rotating and replacing the arrangement of the magnetic poles on the first circumference of the rotor between the first arrangement and the second arrangement, wherein the rotor comprises the first When the arrangement of the magnetic poles on the circumference is the first arrangement, the first permanent magnet of the mover is magnetically attracted and held, while the second permanent magnet of the mover is magnetically repelled, When the arrangement of the magnetic poles on the circumference of 1 is the second arrangement, the second permanent magnet of the mover is magnetically attracted and held, while the first permanent magnet of the mover is magnetically repelled, The mover is disposed between the first permanent magnet and the second permanent magnet, and has a cylindrical shape or a ring. And an intermediate member formed so as to be movable in the direction of the movable axis, and penetrating through a central hole formed in the first permanent magnet, the second permanent magnet, and the intermediate member. A fixed core that supports the first permanent magnet, the second permanent magnet, and the intermediate member, and the first permanent magnet that is disposed on the opposite side of the intermediate member across the first permanent magnet along the movable axis direction and rotates. A first fixing member fixed to the fixed core in a state in which rotation about the movable shaft is blocked by a blocking mechanism, and the intermediate portion sandwiching the second permanent magnet along the movable shaft direction A second fixing member disposed on the opposite side of the member and fixed to the fixed core; a contact portion between the first fixing member and the first permanent magnet; the first permanent A contact portion between the magnet and the intermediate member, and the middle At the contact portion between the intermediate member and the second permanent magnet, the first permanent magnet is engaged with the first fixing member, the intermediate member is engaged with the first permanent magnet, Concave and convex engaging means for preventing the rotation of the first permanent magnet and the second permanent magnet around the movable shaft by engaging the second permanent magnet with the intermediate member is provided. ing.

  In one configuration example of the bistable moving device according to the present invention, the fixed core, the first fixing member, the second fixing member, and the intermediate member are made of a non-magnetic material.

  In addition, one configuration example of the bistable moving device according to the present invention is a cylindrical shape in which a first fixing member, a second fixing member, and an intermediate member are formed with a hole through which a fixed core passes in the center. Or it makes a ring shape.

  Also, in one configuration example of the bistable moving device according to the present invention, the concave and convex engaging means includes a concave portion formed in the first or second permanent magnet in the contact portion, and the concave portion in the intermediate member. It consists of the convex part formed in the position which opposes.

  Further, in one configuration example of the bistable moving device according to the present invention, the concave portion is formed at a position in contact with a part of the outer peripheral edge (or inner peripheral edge) of the first or second permanent magnet. Is formed at a position facing the concave portion and in contact with a part of the outer peripheral edge (or inner peripheral edge) of the intermediate member.

  Further, in one configuration example of the bistable moving device according to the present invention, the concave portion is formed of a concave groove extending in the radial direction formed on the contact surface on the first or second permanent magnet side in the contact portion, A convex part consists of the protruding item | line extended in the radial direction formed in the contact surface by the side of an intermediate member facing the said ditch | groove.

  Further, in one configuration example of the bistable moving device according to the present invention, the concave portion is formed of a D-cut portion formed in a part of the outer peripheral edge of the first or second permanent magnet, and the convex portion is the D It protrudes and forms in a part of outer periphery of an intermediate member so that a cut part may be contacted.

  Moreover, one structural example of the said bistable movement apparatus concerning this invention is formed so that the cut end surface of D cut may be along the direction parallel to the magnetic pole arrangement | positioning direction of a 1st or 2nd permanent magnet. .

  Further, in one configuration example of the bistable moving device according to the present invention, the fixed core is formed integrally with the first fixed member, the second fixed member, or the intermediate member.

  Also, in one configuration example of the bistable moving device according to the present invention, the rotation prevention mechanism is formed on the first fixing member of the movable element or a connection member connected to the first fixing member. The first fixed member can be moved in the direction of the movable shaft by engaging with a guide portion provided at the fixed end, and the movable shaft of the first fixed member is centered on the movable shaft. This is designed to prevent rotation.

  According to the present invention, for the purpose of fixing the permanent magnet, it is not necessary to increase the clearance between the outer peripheral surface of the permanent magnet serving as the mover and the inner peripheral surface of the permanent magnet of the rotor. Reduction can be suppressed. In addition, since the permanent magnet that becomes the mover can be fixed without using an adhesive or mold, there is no need to perform application state management and inspection of adhesive strength as in the case of using an adhesive. There are no environmental concerns or long-term reliability concerns. Moreover, the process of magnetizing one by one after molding, such as when using a resin mold, becomes unnecessary.

It is a front view which shows the principal part structure of the bistable movement apparatus concerning this invention. It is AA sectional drawing of FIG. It is a structural example of an uneven | corrugated engaging means (hemisphere). It is an example of a structure of an uneven | corrugated engagement means (outer periphery-slant chamfering shape). It is a structural example of an uneven | corrugated engaging means (outer periphery-triangular pyramid shape). It is an example of a structure of uneven | corrugated engagement means (inner periphery-plane rectangular parallelepiped shape). It is an example of a structure of uneven | corrugated engagement means (radial direction-a ditch | groove / ridge shape). It is a structural example of an uneven | corrugated engaging means (outer periphery-D cut). It is AA sectional drawing (integration of a fixed core and a fixing member) of FIG. It is an example of application to the shut-off valve of the bistable movement apparatus concerning this invention.

[Principle of the present invention]
First, the principle of the present invention will be described.
As described above, in the bistable moving device, the permanent magnet used as the mover needs to be fixed to the movable body so as not to move linearly in the direction of the movable axis and to rotate around the movable axis. . At this time, fixing the permanent magnet serving as the mover has two purposes: preventing linear movement in the direction of the movable axis and preventing rotation about the movable axis.
The present invention pays attention to the fact that the purpose of fixing the permanent magnet as the mover has two different purposes, and realizes these purposes by different structures.

  First, for the purpose of preventing linear movement in the movable axis direction, a rod-shaped fixed core is passed through the center of the movable element, and the first and second fixing members are press-fitted and fixed to both ends of the fixed core, respectively. By sandwiching the first and second permanent magnets serving as fixed movers, linear movement in the movable axis direction is prevented without applying excessive force to the permanent magnet.

  Further, for the purpose of preventing rotation around the movable shaft, the first fixing member and the first permanent magnet are held by a rotation stop mechanism so as to prevent rotation around the movable shaft. The first permanent magnet is engaged with the fixed member at the contact portion between the first permanent magnet and the intermediate member, and the contact portion between the intermediate member and the second permanent magnet. The first permanent magnet with the movable shaft as the center is provided by providing engaging means composed of irregularities (notch shape) so that the intermediate member engages with the magnet and the second permanent magnet engages with the intermediate member. In addition, the rotation of the second permanent magnet is prevented.

As a result, the parts including the permanent magnet as the mover are integrally fixed by the fixing member or the intermediate member fixed to the fixed core with reference to the single fixed core arranged at the center of the mover. Thus, the linear movement of the permanent magnet in the movable axis direction is prevented.
Further, since the fixed member or the intermediate member and the permanent magnet are engaged by the engaging means provided in the contact portion where the permanent magnet and the fixed member or the intermediate member are in contact with each other, the rotation about the movable axis with respect to the permanent magnet serving as the mover is performed. Will be blocked.

  Therefore, according to the present invention, for the purpose of fixing the permanent magnet, it is not necessary to increase the clearance between the outer peripheral surface of the permanent magnet serving as the mover and the inner peripheral surface of the permanent magnet of the rotor. Decrease in magnetic force can be suppressed. In addition, since the permanent magnet that becomes the mover can be fixed without using an adhesive or mold, there is no need to perform application state management and inspection of adhesive strength as in the case of using an adhesive. There are no environmental concerns or long-term reliability concerns. Moreover, the process of individually magnetizing after molding, such as when using a resin mold, is not required.

[About the embodiment]
Next, embodiments of the present invention will be described with reference to the drawings.
First, with reference to FIG. 1 and FIG. 2, the bistable movement apparatus 100 concerning one embodiment of this invention is demonstrated. FIG. 1 is a front view showing a main configuration of a bistable movement device according to the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG.

  This bistable moving device 100 is a device used for various purposes such as a shut-off valve, an electromagnetic switch, and an electronic lock, and the rotor 1 is rotated by the rotor rotating means 4 so that the mover 1 is rotated. It has a function of moving between the first arrangement and the second arrangement and holding it at either position.

[About mover (movable body)]
In FIG. 1, a fixed core 10 is passed through the center of the mover 1. The fixed core 10 is a nonmagnetic material. Hereinafter, an integral body including the fixed core 10 and permanent magnets 11 and 12 described later supported by the fixed core 10, an intermediate member 13, and fixed members 14 and 15 is referred to as a movable body 1A.

  1 A of movable bodies are provided so that the movement to the axial direction (Z-axis direction) of the fixed core 10 is possible. That is, the movable body 1A (movable element 1) is provided so as to be movable in the movable axis direction with the Z-axis direction as the movable axis direction. The movable body 1A (movable element 1) is held so as to prevent rotation about the Z axis. A mechanism for preventing the rotation of the movable body 1A (movable element 1) around the Z axis, that is, a rotation stopping mechanism will be described later. Hereinafter, the Z-axis serving as the base axis of the movable body 1A is referred to as a movable axis.

  The mover 1 includes a cylindrical permanent magnet (first permanent magnet) 11 and a permanent magnet (second permanent magnet) 12, and the permanent magnet 11 and the permanent magnet 12 are respectively magnetized in the radial direction. Yes. In this example, the permanent magnets 11 and 12 have the same shape and the same size except for the rotation stop mechanism.

  Further, in this example, the permanent magnet 11 has a configuration in which two magnetic poles are arranged so as to sandwich the movable axis Z in a direction orthogonal to the movable axis Z, and one surface side facing the movable axis Z (see FIG. In the state of 2, the upper side is the S pole, and the other surface side (the lower side in the state of FIG. 2) is the N pole.

  Similarly to the permanent magnet 11, the permanent magnet 12 has a configuration in which two magnetic poles are arranged so as to sandwich the movable axis Z in a direction orthogonal to the movable axis Z, and one surface facing the movable axis Z is opposed to the permanent magnet 12. The side (upper side in the state of FIG. 2) is the N pole, and the other side (lower side in the state of FIG. 2) is the S pole.

That is, in this example, the permanent magnet 11 and the permanent magnet 12 are arranged with a pair of magnetic poles so that the movable axis Z is sandwiched in a direction orthogonal to the movable axis Z so that the different poles face each other in the movable axis direction. It is set as the structure.
In this example, as shown in FIG. 1, the direction of the magnetic poles of the permanent magnets 11 and 12 is relative to the reference direction when the direction of the vertical line L perpendicular to the movable axis Z is the reference direction. Is inclined by an angle δ.

In the present embodiment, intermediate member 13 is arranged between permanent magnet 11 and permanent magnet 12 such that permanent magnet 11 and permanent magnet 12 are spaced apart from each other by a certain distance.
A fixing member (first fixing member) 14 fixed so as to move integrally with the fixed core 10 is disposed on the opposite side of the intermediate member 13 with the permanent magnet 11 interposed therebetween. 14 and the intermediate member 13 are fixed to the fixed core 10 so as to be sandwiched between them.

  In addition, a fixing member (second fixing member) 15 fixed so as to move integrally with the fixed core 10 is disposed on the opposite side of the intermediate member 13 with the permanent magnet 12 interposed therebetween. It is fixed to the fixed core 10 so as to be sandwiched between the fixing member 15 and the intermediate member 13.

That is, the permanent magnet 11 has a cylindrical shape or a ring shape having a hole in the center, is supported by the fixed core 10 penetrating the hole, contacts one end surface of the fixed member 14, and is attached to the intermediate member 13. The other end surfaces are in contact with each other and are sandwiched between the fixing member 14 and the intermediate member 13.
The permanent magnet 12 has a cylindrical shape or a ring shape having a hole in the center, is supported by a fixed core 10 that passes through the hole, contacts one end surface of the fixed member 15, and is attached to the intermediate member 13. The other end surfaces are in contact with each other and are sandwiched between the fixing member 15 and the intermediate member 13.

On the other hand, the fixing member 14 is made of a non-magnetic material and has a cylindrical shape or a ring shape having a hole penetrating in the central portion, and presses the fixing core 10 into the hole to move integrally with the fixing core 10. It is fixed like so. Further, the fixed member 14 is prevented from rotating about the movable shaft by a rotation preventing mechanism.
Similarly, the fixing member 15 is made of a non-magnetic material, has a cylindrical shape or a ring shape having a hole penetrating through the center portion, and presses the fixing core 10 into the hole to move integrally with the fixing core 10. It is fixed like so. At this time, an E ring or a C ring may be used as the fixing member 15.

  Further, the intermediate member 13 is made of a non-magnetic material and has a cylindrical shape or a ring shape having a hole penetrating in the central portion, and the fixed core 10 is press-fitted into the hole to move integrally with the fixed core 10. It is fixed like so.

  Therefore, the permanent magnet 11 and the permanent magnet 12 are sandwiched by the fixing member 14 and the fixing member 15 from both sides with the intermediate member 13 interposed therebetween with the fixed core 10 as a reference. As a result, linear movement in the direction of the movable axis is prevented without applying an excessive force to the permanent magnets 11 and 12, and the permanent magnets 11 and 12 are prevented from falling off the fixed core 10.

  When the fixing core 10 is press-fitted into the fixing members 14 and 15 and the intermediate member 13, it is preferable to use resin for the fixing members 14 and 15 and the intermediate member 13. The intermediate member 13 is formed integrally with the fixed core 10 made of a resin material, the permanent magnets 11 and 12 are arranged so as to sandwich the intermediate member 13, and the fixed members 14 and 15 from the side opposite to the intermediate member 13. The permanent magnets 11 and 12 may be fixed by sandwiching them.

Further, in the present embodiment, the contact portion between the permanent magnet 11 and the fixed member 14 has an uneven engagement means 31 for preventing the rotation of the permanent magnet 11 around the movable shaft via the fixed member 14. The contact portion between the permanent magnet 11 and the intermediate member 13 is provided with uneven engagement means 32 for preventing the rotation of the permanent magnet 11 around the movable shaft through the intermediate member 13. It has been.
The contact portion between the permanent magnet 12 and the intermediate member 13 is provided with concave and convex engaging means 33 for preventing the rotation of the permanent magnet 12 around the movable shaft via the intermediate member 13.

  Accordingly, the permanent magnet 11 is engaged with the fixed member 14 whose rotation about the movable shaft is prevented by the rotation prevention mechanism via the concave / convex engaging means 31, and the concave / convex engaging means 32 is engaged with the permanent magnet 11. The intermediate member 13 is engaged with the intermediate member 13, and the permanent magnet 12 is engaged with the intermediate member 13 through the concave and convex engaging means 33. Thereby, rotation of the permanent magnet 11 and the permanent magnet 12 around the movable shaft is prevented.

FIG. 3 is a configuration example of the concave and convex engaging means (hemispherical shape), FIG. 3A is a cross-sectional view of a main part along the movable shaft, FIG. 3B is a shape of a contact surface on the fixed member 14 side, and FIG. (C) has shown the contact surface shape by the side of the permanent magnet 11. FIG.
The concave / convex engaging means 31 is a hemispherical recess 31A formed on the contact surface on the permanent magnet 11 side and the contact surface on the fixed member 14 side in the contact portion between the permanent magnet 11 and the fixed member 14. And a hemispherical convex portion 31B formed at a position facing the concave portion 31A. By engaging the recess 31 </ b> A and the protrusion 31 </ b> B, the rotation of the permanent magnet 11 around the movable shaft is prevented by the fixing member 14 fixed to the fixed core 10.

  Similarly, the concave-convex engaging means 32 includes a hemispherical recess 32A formed on the contact surface on the permanent magnet 11 side and a contact surface on the intermediate member 13 side in the contact portion between the permanent magnet 11 and the intermediate member 13. However, it is composed of a hemispherical convex portion 32B formed at a position facing the concave portion 32A. By engaging the concave portion 32 </ b> A and the convex portion 32 </ b> B, the rotation of the permanent magnet 11 around the movable shaft is prevented by the intermediate member 13 fixed to the fixed core 10.

  Further, among the contact portions between the permanent magnet 12 and the intermediate member 13, the concave / convex engaging means 33 includes a hemispherical concave portion 33 </ b> A formed on the contact surface on the permanent magnet 12 side and a contact surface on the intermediate member 13 side. However, it is composed of a hemispherical convex portion 33B formed at a position facing the concave portion 33A. By engaging the concave portion 32 </ b> A and the convex portion 32 </ b> B, the rotation of the permanent magnet 12 around the movable shaft is prevented by the intermediate member 13 fixed to the fixed core 10.

  At this time, the recess 31 </ b> A is arranged at an angular position orthogonal to the magnetic pole arrangement direction of the permanent magnet 11 when viewed from the hole provided in the center of the permanent magnet 11. Thereby, since the recessed part 31A is formed in the position away from the magnetic pole arrangement of the permanent magnet 11, it is possible to suppress a decrease in the magnetic force generated by the recessed part 31A. The same applies to the recess 32A and the recess 33A.

  Thus, the permanent magnet 11, the intermediate member 13, and the permanent member are disposed via the concave and convex engaging means 31, 32, and 33 with reference to the fixed member 14 whose rotation about the movable shaft is blocked by the rotation blocking mechanism. Since the magnets 12 are engaged in this order, the fixing members 14 and 15 that are press-fitted to the fixed core 10 can be loosened due to physical impact, temperature change, aging change, and the like, and can be shifted around the movable axis. Even if there is a possibility, the rotation of the permanent magnets 11 and 12 can be reliably prevented.

  When the fixed members 14 and 15 are securely fixed to the fixed core 10 and the rotation about the movable shaft is prevented, the permanent magnet 11 is fixed between the fixed member 14 and the permanent core 10. An uneven engagement means may be provided between the magnet 12 and the fixing member 15 so that the permanent magnet 11 is engaged with the fixing member 14 and the permanent magnet 12 is engaged with the fixing member 15. Alternatively, the permanent magnet 12, the intermediate member 13, and the permanent magnet 11 may be engaged in the reverse order of FIG.

  In addition, when the intermediate member 13 is securely fixed to the fixed core 10 and rotation about the movable shaft is prevented, the intermediate member 13 is interposed between the permanent magnet 11 and the permanent magnet 12. An uneven engagement means may be provided to engage the permanent magnet 11 and the permanent magnet 12 with the intermediate member 13.

[About rotors]
In FIG. 1, the rotor 2 is rotatable about the movable axis Z and is held so as to prevent movement in the direction of the movable axis. The rotor 2 is a ring magnetized in the radial direction or a cylindrical permanent magnet (in this example, a ring-shaped permanent magnet). The rotor 2 extends in the direction of the movable axis through the hollow portion 2A of the ring-shaped permanent magnet. A movable body 1A (movable element 1) is provided so as to be movable.

  In the rotor 2, the inner peripheral surface of the ring-shaped permanent magnet is such that one surface side (upper side in the state of FIG. 2) facing the movable shaft Z is the S pole and the other surface side (in the state of FIG. 2). The lower surface is an N pole, and the outer peripheral surface of the ring-shaped permanent magnet is an N pole and the other surface side (the upper side in the state of FIG. 2) facing the movable shaft Z. The lower side in the state of FIG.

  That is, the rotor 2 has a position of the S pole on the first circumference (inner circumferential surface) centered on the movable axis Z, and has a larger diameter than the first circumference centered on the movable axis Z. A first magnetic pole (upper magnetic pole pair) pair having an N-pole position on the second circumference (outer peripheral surface) and N on the first circumference (inner peripheral surface) centered on the movable axis Z The second magnetic pole pair (the lower magnetic pole pair) having the S pole position on the second circumference (outer peripheral surface) having a diameter larger than the first circumference centered on the movable axis Z. ) Are disposed so as to sandwich the mover 1 in a direction orthogonal to the movable axis Z.

[About rotor rotation means]
In FIG. 1, the rotor rotating means 4 applies a magnetic field in the forward and reverse directions to the rotor 2 from a direction substantially orthogonal to the movable axis Z to rotate (rotate 180 °) the rotor 2, It has a function of switching the arrangement of the magnetic poles on the peripheral surface between the first arrangement and the second arrangement.

  The rotor rotating means 4 includes an electromagnetic coil 41 and yokes 42 connected to or integrated with both ends of the core of the electromagnetic coil 41. The yoke 42 has an opposing surface that is positioned so as to surround the outer peripheral surface of the rotor 2 (the outer periphery of the second circumference). The yoke 42 may not be integrally formed so as to surround the outer peripheral surface of the rotor 2, and as shown by a broken line in FIG. 1, the yoke 42 is provided on one side and the other side of the magnetic flux output from the electromagnetic coil 41. For example, two C-shaped (U-shaped) yokes connected to each other may be arranged so as to surround the outer peripheral surface of the rotor 2.

[About uneven engagement means]
In FIG. 3, the concave / convex engaging means 31 (32, 33) has been described as an example in which the concave and convex portion 31 A (32 A, 33 A) and the convex portion 31 B (32 B, 33 B) are configured. It is not limited to. Below, some structural examples of the uneven | corrugated engagement means 31 (32, 33) are demonstrated.

First, referring to FIG. 4, concave and convex portions 31 </ b> A and 31 </ b> B are provided at positions where concave and convex engaging means 31 is in contact with a part of the outer peripheral edge of permanent magnet 11 in the contact portion between permanent magnet 11 and fixing member 14. The case where is formed will be described.
4A and 4B are configuration examples of the concave-convex engaging means (outer peripheral edge-oblique chamfered shape). FIG. 4A is a cross-sectional view of the main part along the movable shaft, and FIG. 4B is a contact surface on the fixed member 14 side. FIG. 4C shows the shape of the contact surface on the permanent magnet 11 side.

  Here, as a specific example of the concavo-convex engaging means 31, the concave portion 31 </ b> A has a chamfered shape formed on a part of the outer peripheral edge of the permanent magnet 11, and the convex portion 31 </ b> B is one of the outer peripheral edges of the fixing member 14. It is comprised from the convex part formed in a part and engaging with the recessed part 31A. This chamfered shape is a shape in which a part of the outer peripheral edge of the permanent magnet 11 is chamfered obliquely with, for example, a flat inclined surface.

  At this time, the recess 31 </ b> A is chamfered along a direction parallel to the magnetic pole arrangement direction of the permanent magnet 11. Thereby, since the recessed part 31A is formed in the position away from the magnetic pole arrangement of the permanent magnet 11, it is possible to suppress a decrease in the magnetic force generated by the recessed part 31A.

Further, the shape of the concave / convex engaging means 31 is not limited to the chamfered shape of FIG. 4, and may be a triangular pyramid shape as shown in FIG. 5.
5A and 5B are configuration examples of the concave-convex engaging means (outer peripheral edge-triangular pyramid shape), FIG. 5A is a cross-sectional view of a main part along the movable shaft, and FIG. 5B is a contact surface on the fixed member 14 side. FIG. 5C shows the shape of the contact surface on the permanent magnet 11 side.

  Here, as a specific example, the concave portion 31 </ b> A has a triangular pyramid shape formed on a part of the outer peripheral edge of the permanent magnet 11, and the convex portion 31 </ b> B is formed on a part of the outer peripheral edge of the fixing member 14. It is comprised from the convex part engaged with 31 A of recessed parts. This triangular pyramid shape has a valley shape in which the ridge line is formed in a V shape extending radially outward from the center of the permanent magnet 11 and becomes deeper as it goes radially outward.

  At this time, the recess 31 </ b> A is formed in a direction perpendicular to the magnetic pole arrangement direction of the permanent magnet 11 when viewed from the hole provided in the center of the permanent magnet 11. Thereby, since the recessed part 31A is formed in the position away from the magnetic pole arrangement of the permanent magnet 11, it is possible to suppress a decrease in the magnetic force generated by the recessed part 31A.

Next, with reference to FIG. 6, the concave / convex engaging means 31 is located at a position in contact with a part of the inner peripheral edge of the permanent magnet 11 in the contact portion between the permanent magnet 11 and the fixing member 14. A case where 31B is formed will be described.
6A and 6B are configuration examples of the concave-convex engaging means (inner peripheral edge-plane rectangular parallelepiped shape), FIG. 6A is a cross-sectional view of the main portion along the movable shaft, and FIG. 6B is a contact surface on the fixed member 14 side. FIG. 6C shows the shape of the contact surface on the permanent magnet 11 side.

  Here, as a specific example, the concave portion 31 </ b> A has a substantially rectangular parallelepiped shape formed on a part of the inner peripheral edge of the permanent magnet 11, and the convex portion 31 </ b> B is formed on a part of the inner peripheral edge of the fixing member 14. It is comprised from the convex part engaged with 31 A of recessed parts. This rectangular parallelepiped shape has a shape communicating with the central hole of the permanent magnet 11 by one end face thereof.

  At this time, the recess 31 </ b> A is arranged at an angular position orthogonal to the magnetic pole arrangement direction of the permanent magnet 11 when viewed from the hole provided in the center of the permanent magnet 11. Thereby, since the recessed part 31A is formed in the position away from the magnetic pole arrangement of the permanent magnet 11, it is possible to suppress a decrease in the magnetic force generated by the recessed part 31A.

Next, referring to FIG. 7, the concave / convex engaging means 31 has a shape extending in the radial direction of the permanent magnet 11 in the contact portion between the permanent magnet 11 and the fixing member 14, and the concave portion 31 </ b> A and the convex portion 31 </ b> B are formed. The case where this is done will be described.
FIG. 7 is a configuration example of the concave / convex engaging means (radial direction—concave groove / ridge shape), FIG. 7A is a cross-sectional view of the main part along the movable shaft, and FIG. FIG. 7C shows the contact surface shape on the permanent magnet 11 side.

  Here, as a specific example, the concave portion 31A has a concave groove shape extending in the radial direction of the permanent magnet 11, and the convex portion 31B is associated with the concave portion 31A formed at a part of the outer peripheral edge of the fixing member 14. Convex ridge shape. This rectangular parallelepiped shape has a shape communicating with the inner peripheral edge of the permanent magnet 11, that is, the central hole, by one end face thereof. Various shapes such as a rectangle, a trapezoid, a triangle, a semicircle, and a semi-ellipse can be used as the cross-sectional shapes of the groove shape and the ridge shape.

  At this time, the recess 31 </ b> A is formed along an angular direction orthogonal to the magnetic pole arrangement direction of the permanent magnet 11 when viewed from the hole provided in the center of the permanent magnet 11. Thereby, since the recessed part 31A is formed in the position away from the magnetic pole arrangement of the permanent magnet 11, it is possible to suppress a decrease in the magnetic force generated by the recessed part 31A.

Next, with reference to FIG. 8, the case where the recessed part 31A of the uneven | corrugated engagement means 31 consists of D cut part formed in a part of outer periphery of the permanent magnet 11 is demonstrated.
8A and 8B are configuration examples of the concave-convex engaging means (outer peripheral edge-D cut), FIG. 8A is a cross-sectional view of a main part along the movable shaft, and FIG. 8B is a contact surface shape on the fixed member 14 side. FIG. 8C shows the contact surface shape on the permanent magnet 11 side.

  Here, as a specific example, the concave portion 31 </ b> A includes a D-cut portion formed at a part of the outer peripheral edge of the permanent magnet 11, and the convex portion 31 </ b> B is formed at a part of the outer peripheral edge of the fixing member 14. It is comprised from the convex part engaged with 31A. The D-cut portion has a D-cut shape in which a part of the outer peripheral edge of the permanent magnet 11 is chamfered with a flat surface parallel to the movable shaft. The convex portion 33B is formed so as to protrude from a part of the outer peripheral edge of the fixing member 14 so as to come into contact with the D-cut portion.

At this time, the recess 31 </ b> A is chamfered along a direction parallel to the magnetic pole arrangement direction of the permanent magnet 11. Thereby, since the recessed part 31A is formed in the position away from the magnetic pole arrangement of the permanent magnet 11, it is possible to suppress a decrease in the magnetic force generated by the recessed part 31A.
In addition, although the structural example of the uneven | corrugated engagement means 31 was demonstrated in the above FIGS. 4-8, it is applicable similarly to the uneven | corrugated engagement means 32 and 33. FIG.

[Integration of fixed core and fixed member]
In FIG. 2, the case where the fixed core 10 and the fixing member 15 are separate has been described as an example. However, the present invention is not limited to this, and the fixed core 10 and the fixing member 15 may be integrally formed. . In this embodiment, the case where the fixing member 15 is formed integrally with the fixed core 10 has been described as an example. However, the present invention is not limited thereto, and the fixing member 14 and the intermediate member 13 are formed integrally with the fixed core 10. May be.

9 is a cross-sectional view taken along the line AA in FIG. 1 (integration of a fixed core and a fixing member).
In FIG. 9, the fixing member 15 is connected to the fixed core 10 by, for example, cutting out from one member, and is integrally formed. Thereby, the permanent magnet 12 is fixed to the fixed core 10 in a form sandwiched between the fixed member 15 and the fixed core 10.
Therefore, one part constituting the movable body 1A can be reduced, leading to a reduction in assembly man-hours.

[Example of application to shut-off valve]
Next, an example in which the bistable moving device 100 according to the present invention is applied to a shut-off valve will be described with reference to FIG. FIG. 10 shows an application example of the bistable moving device according to the present invention to a shut-off valve.
The shutoff valve is a device that electrically shuts off / returns (closes / opens) the pipeline, such as a city gas or LP gas supply pipeline or a gas emergency shutoff device installed in a gas meter. The bistable moving device 100 according to the present invention drives the valve body of the shut-off valve connected to the mover by moving the connected mover between two positions and holding it in either position. Used as a mechanism to

In FIG. 10, a seal pipe (nonmagnetic member) 51 is fitted into an opening 50 </ b> A of a flange (nonmagnetic member) 50 via an O-ring 52, and the movable body 1 </ b> A is disposed in the seal pipe 51. Yes.
The fixed core 10 of the movable body 1 </ b> A extends outside the seal tube 51 through the opening 50 </ b> A of the flange 50. The seal tube 51 is integrally or hermetically connected so that one end thereof communicates with the opening 50A of the flange 50, and the other end is closed. Further, the flange 50 has a flange surface as an attachment portion to the flow path.

  The valve body 53 is a valve body that receives a force in the direction of the movable axis of the movable body 1A and opens and closes the flow path by contact and separation between a surface of the movable body 1A and a valve seat (not shown) formed in the flow path. The valve body 53 is fixed as a fixed member (first fixed member) 14 to the fixed core 10 of the movable body 1A by press-fitting. At this time, the movable body 1A slides on the inner surface of the seal tube 51, but the diameters of the permanent magnets 11 and 12 are set so that parts other than the permanent magnets 11 and 12 slide on the inner surface of the seal tube 51. What is necessary is just to make it smaller than the diameter of the intermediate member 13 or the fixing members 14 and 15. In the example of FIG. 10, the valve body 53 is formed integrally with the fixing member 14, but the valve body 53 may be connected to the fixing member 14.

  Further, the valve body 53 is formed with a rotation stop mechanism 54 having a guide hole on the back side thereof, and a guide provided on the flange 50 which is a fixed end with respect to the hole of the rotation stop mechanism 54. Part 50B is inserted and engaged. The valve body 53 is guided by the rotation stop mechanism 54 with the guide portion 50B provided on the flange 50 as a guide, and the rotation of the valve body 53 about the movable axis Z is restricted (blocked). Is done.

[Regular latch operation]
Next, with reference to FIGS. 1-2, the normal latch operation | movement concerning the bistable movement apparatus 100 of this invention is demonstrated.
In the state of FIG. 2, the rotor 2 is rotated by the rotor rotating means 4, and the magnetic poles on the inner circumferential surface of the rotor 2 (ring-shaped permanent magnet) are arranged in the first arrangement (the upper side is the S pole and the lower side). The side is switched to N pole) P1.
In this first arrangement P1, the magnetic poles on the inner peripheral surface of the rotor 2 are the S pole on the upper side and the N pole on the lower side, as shown in FIG. In this state, the rotor 2 magnetically attracts the permanent magnet 12 of the mover 1.

That is, the permanent magnet 12 of the mover 1 is drawn into the hollow portion 2A and latched (attracted / held). FIG. 2 shows the polarity (N pole / S pole) of the magnetic pole of the permanent magnet 11 with respect to the movable body 1A so that the relationship with the polarity (N pole / S pole) of the rotor 2 can be easily understood. ing.
Note that the state of the first arrangement P1 is a state in which the energization to the electromagnetic coil 41 is interrupted after the rotor 2 is rotated by the rotor rotating means 4, that is, the energization to the electromagnetic coil 41 is performed (non-non-conductive). Excitation state).

  In the non-excited state of the electromagnetic coil 41, the rotor 2 has its magnetic poles with respect to the direction of the line L (reference direction) perpendicular to the movable axis Z by the magnetic attraction force between the rotor 42 and the rotor 42. Balanced and stationary with the direction tilted by an angle θ.

  Assume that the rotor 2 is rotated (rotated 180 °) by the rotor rotating means 4 from the state of the first arrangement P1, and the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is switched to the second arrangement. In other words, it is assumed that the positions of the magnetic poles on the inner peripheral surface of the rotor 2 are changed, and the lower side is the S pole and the upper side is the N pole. Then, the magnetic attractive force between the permanent magnet 12 and the rotor 2 of the mover 1 disappears, and a magnetic repulsive force is generated between the permanent magnet 12 and the rotor 2.

As a result, the permanent magnet 12 leaves the rotor 2, the permanent magnet 11 approaches the rotor 2, and the movable element 1 moves along the movable axis direction by the resultant force with the magnetic attractive force generated between the permanent magnet 11 and the permanent magnet 11. Moving from the first arrangement P1 to the second arrangement P2 (from the right side to the left side in FIG. 2), the permanent magnet 12 of the mover 1 is latched by the rotor 2.
The state of the second arrangement P2 is a state in which the energization to the electromagnetic coil 41 is interrupted after the rotor 2 is rotated by the rotor rotating means 4, that is, the energization to the electromagnetic coil 41 is performed (non-non-conducting). Excitation state).

  In the non-excited state of the electromagnetic coil 41, the rotor 2 has its magnetic poles with respect to the direction of the line L (reference direction) perpendicular to the movable axis Z by the magnetic attraction force between the rotor 42 and the rotor 42. Balance and stand still with the direction tilted by an angle θ.

  Next, from the state of the second arrangement P2, the rotor 2 is rotated (rotated 180 °) by the rotor rotating means 4, and the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is switched to the first arrangement P1. Suppose. In other words, it is assumed that the positions of the magnetic poles on the inner peripheral surface of the rotor 2 are changed so that the lower side is the N pole and the upper side is the S pole. Then, the magnetic attractive force between the permanent magnet 11 and the rotor 2 of the mover 1 disappears, and a magnetic repulsive force is generated between the permanent magnet 11 and the rotor 2.

  As a result, the permanent magnet 11 leaves the rotor 2, the permanent magnet 12 approaches the rotor 2, and the movable element 1 moves along the movable axis direction by the resultant force with the magnetic attractive force generated between the permanent magnet 12 and the permanent magnet 12. Moving from the second arrangement P2 to the first arrangement P1 (from the left side to the right side in FIG. 2), the permanent magnet 12 of the mover 1 is latched by the rotor 2.

  Thus, by rotating the rotor 2 by the rotor rotating means 4, the mover 1 moves in a non-contact manner with the rotor 2, and the latch 1 in the first arrangement P1 of the mover 1 and the second Is latched at the position P2.

  In this case, the magnetic pole on the outer peripheral surface of the rotor 2 is used for generating a rotational force, and the magnetic pole on the inner peripheral surface of the rotor 2 is used for magnetic attraction holding and magnetic repulsion of the movable element 1. The rotor 2 can be rotated with a weak force from the outer peripheral side against the torque that hinders the rotation from the inner peripheral side due to the magnetic attraction force generated between the two.

In addition, the rotor 2 is stationary with the magnetic pole 41 being tilted by an angle θ in a non-excited state of the electromagnetic coil 41, so that the rotor 2 rotates efficiently by receiving the magnetomotive force from the rotor rotating means 4. .
Specifically, in the non-excited state of the electromagnetic coil 41, when the direction of the magnetomotive force from the yoke 42, that is, the direction of the vertical line L orthogonal to the movable axis Z is used as the reference direction, the magnetic pole arrangement of the rotor 2 The direction is inclined by the crossing angle θ with respect to this reference direction. Thereby, the magnetomotive force generated when the electromagnetic coil 41 is in an excited state efficiently acts on the rotation of the rotor 2.

  If the crossing angle θ is not applied, that is, if θ = 0, the clockwise and counterclockwise (clockwise and counterclockwise) rotational forces are balanced even when the magnetomotive force is applied. Therefore, it is difficult to rotate. On the other hand, by setting the crossing angle θ, not only the rotor 2 can be easily rotated but also the rotor 2 can be rotated in one direction.

[When impact in the other direction or temporary excessive force is applied in the latched state]
Now, when the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is the first arrangement P1, and the permanent magnet 11 of the mover 1 is magnetically attracted to the rotor 2 (see FIG. 2), the movable shaft It is assumed that an impact or temporary excessive force is applied to the second arrangement P2 in the direction, and the mover 1 has moved to the second arrangement P2.

  In this case, the mover 1 is moved from the state in which the permanent magnet 12 is latched to the rotor 2 in a state where the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is in the first arrangement P1. Move to the second arrangement P2. Thereby, when the permanent magnet 11 of the mover 1 approaches the rotor 2, a magnetic repulsive force is generated between the permanent magnet 11 and the rotor 2.

  As a result, the permanent magnet 11 moves away from the rotor 2, the permanent magnet 12 approaches the rotor 2, and the movable element 1 moves the movable shaft by the resultant force of the magnetic attractive force generated between the permanent magnet 12 and the rotor 2. Returned to the first arrangement P1 in the direction.

  That is, even if an impact or temporary excessive force is applied to the second arrangement P2 in the movable axis direction and the mover 1 moves to the second arrangement P2 in the movable axis direction, the mover 1 does not move in the movable axis direction. Instead of being latched at the position moved to the second arrangement P2, it automatically returns to the latch (original latched state) at the position moved to the first arrangement P1 in the movable axis direction.

  Now, when the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is the second arrangement P2, and the permanent magnet 12 of the mover 1 is magnetically attracted to the rotor 2 (see FIG. 2), the movable shaft It is assumed that an impact or temporary excessive force is applied to the first arrangement P1 in the direction, and the mover 1 has moved to the first arrangement P1 in the movable axis direction.

  In this case, the mover 1 is moved from the state in which the permanent magnet 11 is latched to the rotor 2 in a state where the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is in the second arrangement P2 in the direction of the movable axis. Move to the first arrangement P1. Thereby, when the permanent magnet 12 of the mover 1 approaches the rotor 2, a magnetic repulsive force is generated between the permanent magnet 12 and the rotor 2.

  As a result, the permanent magnet 12 moves away from the rotor 2, the permanent magnet 11 approaches the rotor 2, and the mover 1 is moved to the movable shaft by the resultant force of the magnetic attractive force generated between the permanent magnet 11 and the rotor 2. Returned to the second arrangement P2 in the direction.

  That is, even if an impact or temporary excessive force is applied to the first arrangement P1 in the movable axis direction and the mover 1 moves to the first arrangement P1 in the movable axis direction, the mover 1 does not move in the movable axis direction. Instead of being latched at the position moved to the first arrangement P1, it automatically returns to the latch (original latch state) at the position moved to the second arrangement P2 in the movable axis direction.

  As described above, in the bistable moving device 100 of the present embodiment, if the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 is not changed by rotating the rotor 2, the first arrangement P <b> 1 of the mover 1 is obtained. It is not possible to switch the latch from the moved position to the position moved to the second arrangement P2, and to switch the latch from the position moved to the second arrangement P2 to the position moved to the first arrangement P1. Further, the movement of the mover 1 latched at the position moved to the first arrangement P1 without changing the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2 to the second arrangement P2, the second When the mover 1 latched at the position moved to the arrangement P2 is moved to the first arrangement P1, it automatically returns to the original latched state.

  In the bistable moving device 100 of the present embodiment, a lock mechanism called rotation of the rotor 2 is added to the movement of the mover 1 in the direction of the movable axis. By adding this lock mechanism, reliable operation can be achieved. Can be obtained, and safety is improved.

  Further, in the bistable moving device 100 of the present embodiment, permanent magnets are used for both the mover 1 and the rotor 2, and the main power for moving the mover 1 in the direction of the movable axis is the rotor (permanent). Using both the magnetic repulsive force of the mover (permanent magnet) 1 and the magnetic attractive force of the mover (permanent magnet) 1 working with the magnet 2) at the same time, The rotational force for rotating the rotor 2 is used only as a pilot power to change the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2. As a result, a magnetic field is instantaneously applied from a position close to the rotor (permanent magnet) 2 to generate a rotational torque necessary to change the arrangement of the magnetic poles on the inner peripheral surface of the rotor 2. Well, it can be operated with (in principle) less power than a conventional solenoid used for the main power of movement in the direction of the movable axis.

[Effects of the present embodiment]
As described above, in this embodiment, the permanent magnet 11 is sandwiched between the intermediate member 13 and the fixing member 14 fixed to the fixed core 10, and the permanent magnet 12 is fixed to the intermediate member 13 and the fixed core 10. The uneven engagement means 31 is sandwiched between the contact member 15 and the contact portion between the fixed member 14 and the permanent magnet 11, the contact portion between the permanent magnet 11 and the intermediate member 13, and the contact portion between the intermediate member 13 and the permanent magnet 12. , 32, and 33, and the permanent magnet 11, the intermediate member 13, and the permanent magnet 12 are engaged in this order from the fixed member 14 whose rotation about the movable shaft is blocked by the rotation blocking mechanism. It is.

Accordingly, the permanent magnets 11 and 12 that become the mover 1 by the fixed members 14 and 15 or the intermediate member 13 fixed to the fixed core 10 with reference to the single fixed core 10 arranged at the center of the mover 1. Therefore, the linear movement of the permanent magnets 11 and 12 in the movable axis direction is prevented.
Further, the engaging means 31, 32, 33 are engaged in the order of the permanent magnet 11, the intermediate member 13, and the permanent magnet 12 from the fixed member 14 whose rotation about the movable shaft is blocked by the rotation blocking mechanism. Therefore, the rotation around the movable axis with respect to the permanent magnets 11 and 12 that become the mover 1 is prevented.

  Therefore, according to the present invention, for the purpose of fixing the permanent magnet, it is not necessary to increase the clearance between the outer peripheral surface of the permanent magnet serving as the mover and the inner peripheral surface of the permanent magnet of the rotor. Decrease in magnetic force can be suppressed. In addition, since the permanent magnet that becomes the mover can be fixed without using an adhesive or mold, there is no need to perform application state management and inspection of adhesive strength as in the case of using an adhesive. There are no environmental concerns or long-term reliability concerns. Moreover, the process of magnetizing one by one after molding, such as when using a resin mold, becomes unnecessary.

[Extended embodiment]
The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. In addition, each embodiment can be implemented in any combination within a consistent range.

  DESCRIPTION OF SYMBOLS 100 ... Bistable movement apparatus, 1 ... Movable element, 1A ... Movable body, 10 ... Fixed core, 11 ... Permanent magnet (1st permanent magnet), 12 ... Permanent magnet (2nd permanent magnet), 13 ... Intermediate member , 14 ... fixing member (first fixing member), 15 ... fixing member (second fixing member), 2 ... rotor, 2A ... hollow portion, 31, 32, 33 ... uneven engagement means, 31A, 32A, 33A ... concave portion, 31B, 32B, 33B ... convex portion, 4 ... rotor rotating means, 41 ... electromagnetic coil, 42 ... yoke, 50 ... flange, 50A ... opening, 50B ... guide portion, 51 ... seal tube, 52 ... O-ring, 53 ... valve body, 54 ... anti-rotation mechanism.

Claims (10)

A cylindrical or ring-shaped first holding a pair of magnetic poles so as to be movable in a movable axis direction that is an axial direction of the movable axis and sandwiching the movable axis in a direction orthogonal to the movable axis. A permanent magnet is held so as to be movable in the direction of the movable axis, and the movable axis is sandwiched in a direction perpendicular to the movable axis, and is different from the magnetic pole of the first permanent magnet in the direction of the movable axis. A mover including a cylindrical or ring-shaped second permanent magnet in which a pair of magnetic poles are arranged so that the poles face each other;
It is rotatable about the movable shaft and is held so as to prevent movement in the direction of the movable shaft, and the position of one magnetic pole is on the first circumference centered on the movable shaft, and the other magnetic pole Two magnetic pole pairs having a position on the second circumference centered on the movable shaft having a diameter larger than the first circumference are sandwiched between the movable element in a direction perpendicular to the movable shaft. A rotor with permanent magnets arranged;
Rotator rotating means for rotating the rotor to change the arrangement of magnetic poles on the first circumference of the rotor between the first arrangement and the second arrangement;
When the arrangement of the magnetic poles on the first circumference is the first arrangement, the rotor magnetically holds the first permanent magnet of the mover while the second permanent of the mover. When the magnet is magnetically repelled and the arrangement of the magnetic poles on the first circumference is the second arrangement, the second permanent magnet of the mover is magnetically attracted and held, while the first of the mover Repel the permanent magnet,
The mover is
An intermediate member that is disposed between the first permanent magnet and the second permanent magnet and has a cylindrical shape or a ring shape, and is held movably in the movable axis direction; the first permanent magnet; A fixed core that supports the first permanent magnet, the second permanent magnet, and the intermediate member by passing through the central hole formed in the second permanent magnet and the intermediate member, and the movable It is disposed on the opposite side of the intermediate member along the axial direction with the first permanent magnet interposed therebetween, and is fixed to the fixed core in a state in which rotation about the movable shaft is blocked by a rotation blocking mechanism. A first fixing member, and a second fixing member disposed on the opposite side of the intermediate member with the second permanent magnet sandwiched along the movable axis direction, and fixed to the fixed core. In addition,
The contact portion between the first fixed member and the first permanent magnet, the contact portion between the first permanent magnet and the intermediate member, and the contact portion between the intermediate member and the second permanent magnet The first permanent magnet is engaged with the first fixing member, the intermediate member is engaged with the first permanent magnet, and the second permanent magnet is engaged with the intermediate member. And a concavo-convex engaging means for preventing rotation of the first permanent magnet and the second permanent magnet around the movable shaft. The bistable movement device according to claim 1,
The bistable movement device, wherein the fixed core, the first fixed member, the second fixed member, and the intermediate member are made of a non-magnetic material. In the bistable movement apparatus of Claim 1 or Claim 2,
The bistable movement characterized in that the first fixing member, the second fixing member, and the intermediate member have a cylindrical shape or a ring shape in which a hole through which the fixing core passes is formed in a central portion. apparatus. In the bistable movement apparatus as described in any one of Claims 1-3,
The concavo-convex engaging means includes a concave portion formed in the first or second permanent magnet in the contact portion and a convex portion formed in a position facing the concave portion in the intermediate member. A bistable moving device characterized by that. In the bistable movement apparatus of Claim 4,
The concave portion is formed at a position in contact with a part of the outer peripheral edge (or inner peripheral edge) of the first or second permanent magnet, and the convex portion faces the concave portion and is located outside the intermediate member. A bistable moving device formed at a position in contact with a part of a peripheral edge (or inner peripheral edge). In the bistable movement apparatus of Claim 4,
The concave portion is a concave groove extending in a radial direction formed on the contact surface on the first or second permanent magnet side of the contact portion, and the convex portion is opposed to the concave groove, and A bistable movement device comprising a radially extending protrusion formed on a contact surface on the intermediate member side. In the bistable movement apparatus of Claim 4,
The concave portion includes a D-cut portion formed at a part of the outer peripheral edge of the first or second permanent magnet, and the convex portion is formed on the outer peripheral edge of the intermediate member so as to contact the D-cut portion. A bistable moving device characterized in that it is formed to protrude in part. The bistable moving device according to claim 7,
The D-cut portion is formed so that a cut end surface thereof is along a direction parallel to a magnetic pole arrangement direction of the first or second permanent magnet. In the bistable movement apparatus as described in any one of Claims 1-8,
The bistable movement device, wherein the fixed core is formed integrally with the first fixed member, the second fixed member, or the intermediate member. In the bistable movement apparatus as described in any one of Claims 1-9,
The rotation preventing mechanism is formed on the first fixed member of the movable element or a connection member connected to the first fixed member, and is engaged with a guide portion provided at a fixed end, A bistable movement device characterized by enabling movement of the first fixed member in the direction of the movable axis and preventing rotation of the first fixed member around the movable axis.

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