JP2006333688A - Power generating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power generating apparatus that allows a coil or a permanent magnet for power generation to be stably displaced in a predetermined direction without causing no losses due to frictions. <P>SOLUTION: In a power generating apparatus 10, since an electrode at outer periphery of first permanent magnets for holding 40, 42 of a driving section 20, and an electrode at inner periphery (inner periphery of each accommodating hole 15) of second permanent magnets for holding 16, 18 for accommodating these first permanent magnets for holding 40, 42 are made of the same polarity, the second permanent magnets for holding 16, 18 are adapted to hold the driving section 20 so as to allow it to vibrate in a shaft line direction with the help of magnetic flotation. Thereby, the vibration of a permanent magnet for power generation 22 (the driving section 20) coupled integrally to the first permanent magnets for holding 40, 42 can be made stable in shaft line direction. Furthermore, no frictions are generated between the first permanent magnets for holding 40, 42 and the second permanent magnets for holding 16, 18, thus causing no losses due to frictions on the vibration of the permanent magnet for power generation 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power generation device, and more particularly to a portable power generation device.

  As a portable power generation device, for example, a permanent magnet, a spring that supports the permanent magnet so as to vibrate, and a coil that accommodates the permanent magnet inside, the permanent magnet is vibrated in the axial direction of the coil. Thus, a configuration in which an induction current is generated in a coil is known (for example, see Patent Document 1).

  In the power generation apparatus disclosed in the patent document, since the permanent magnet is supported only by the spring, loss due to friction or the like does not occur in the vibration of the permanent magnet, and the power generation efficiency can be improved.

  However, in the power generation device having the above configuration, since the permanent magnet is supported only by the spring as described above, the permanent magnet can be vibrated not only in the axial direction of the coil but also in the radial direction of the coil (permanently). The vibration of the magnet is not stable), and the inner diameter of the coil is large enough to prevent contact with the permanent magnet. For this reason, in the electric power generating apparatus of the said structure, the distance dimension between a coil and a permanent magnet is also set largely, and it is the cause of power generation efficiency falling.

On the other hand, a rotary type power generation device using a motor or the like is also known. However, in such a power generation device, friction occurs in the bearing portion of the rotating shaft that supports the coil or the permanent magnet for power generation. There is a problem that a loss occurs in the rotation of the permanent magnet for use and power generation efficiency decreases.
JP-A-10-323006

  In consideration of the above-described facts, the present invention provides a power generation apparatus that does not cause loss due to friction in the displacement of the coil or the permanent magnet for power generation and that can stably displace the coil or the permanent magnet for power generation in a predetermined direction. Is the purpose.

  In order to solve the above-described problem, a power generator according to a first aspect of the present invention includes a coil and a permanent magnet for power generation provided in the vicinity of the coil, and the coil or the permanent magnet for power generation is displaced in a predetermined direction. A first generating permanent magnet integrally connected to the coil or the power generating permanent magnet, and the first holding permanent magnet. The first holding permanent magnet has a receiving hole in which a magnetic pole having the same polarity as the magnetic pole of the receiving portion outer peripheral portion of the first holding permanent magnet is formed in the inner peripheral portion. And a second permanent magnet for holding that can be displaced in the predetermined direction by magnetic levitation.

  According to the first aspect of the present invention, when the power generation permanent magnet provided in the vicinity of the coil or the coil is displaced in a predetermined direction, an induction current is generated in the coil to generate power.

  Here, in this power generation device, the first holding permanent magnet is integrally connected to the coil or the power generation permanent magnet. At least a part of the first holding permanent magnet is housed in the housing hole of the second holding permanent magnet, and the magnetic pole of the housing portion outer peripheral portion of the first holding permanent magnet and the inner peripheral portion of the housing hole. The magnetic poles have the same polarity. As a result, the second holding permanent magnet holds the first holding permanent magnet so as to be displaceable in a predetermined direction by magnetic levitation, so that the coil or the integrally connected to the first holding permanent magnet or The displacement of the permanent magnet for power generation is stabilized in a predetermined direction.

  In addition, since the second holding permanent magnet holds the first holding permanent magnet by magnetic levitation, there is no friction between the first holding permanent magnet and the second holding permanent magnet. Thus, there is no loss due to friction in the displacement of the coil or the permanent magnet for power generation.

  The power generation device of the invention according to claim 2 is provided with an elastic member, a power generation permanent magnet supported by the elastic member so as to vibrate in a predetermined direction, and the power generation permanent magnet provided in the vicinity of the power generation permanent magnet. A coil for generating an induced current by vibration of the first electrode, a first magnetic pole of one of a positive electrode and a negative electrode formed on the outer periphery, and integrally connected to the permanent magnet for power generation, and in the predetermined direction The first holding permanent magnet is accommodated inside the accommodation hole, and the magnetic pole having the same polarity as the magnetic pole of the outer peripheral portion of the first holding permanent magnet is accommodated in the accommodation hole. And a second holding permanent magnet that is formed on an inner periphery of the hole and holds the first holding permanent magnet so as to vibrate in the predetermined direction by magnetic levitation.

  In the power generation device according to claim 2, the power generation permanent magnet is supported by the elastic member so as to vibrate in a predetermined direction. When the power generation permanent magnet vibrates (displaces), an induction current is generated in the coil to generate power. .

  Here, in this power generation device, the first permanent magnet having one of the positive pole and the negative pole formed on the outer peripheral portion is integrally connected to the permanent magnet for power generation. The permanent magnet is accommodated in an accommodation hole formed in the second holding permanent magnet. A magnetic pole having the same polarity as the magnetic pole of the outer peripheral portion of the first holding permanent magnet is formed on the inner peripheral portion of the housing hole. The second holding permanent magnet is a first floating permanent magnet that is magnetically levitated. It is held so that it can vibrate in a predetermined direction. That is, since the vibration direction of the first holding permanent magnet is limited to the predetermined direction by the second holding permanent magnet, the power generating permanent magnet integrally connected to the first holding permanent magnet is stabilized in the predetermined direction. And can be vibrated. Thereby, for example, the distance between the permanent magnet for power generation and the coil can be reduced, and the power generation efficiency can be improved.

  In addition, since the second holding permanent magnet holds the first holding permanent magnet by magnetic levitation, there is no friction between the first holding permanent magnet and the second holding permanent magnet. Thus, no loss due to friction occurs in the vibration of the permanent magnet for power generation.

  A power generation apparatus according to a third aspect of the present invention is the power generation apparatus according to the second aspect, wherein a pair of the first holding permanent magnets are provided on both sides of the power generation permanent magnet along the predetermined direction. A pair of holding permanent magnets is provided corresponding to the pair of first holding permanent magnets.

  In the power generation device according to claim 3, a pair of first holding permanent magnets are integrally connected to both sides of the power generation permanent magnet along a predetermined direction (vibration direction), and the pair of first holding magnets. The permanent magnet is held by a pair of second holding permanent magnets so as to vibrate in the predetermined direction by magnetic levitation. Thus, the first holding permanent magnet and the second holding permanent magnet that limit the vibration of the power generation permanent magnet in the predetermined direction are provided on both sides of the power generation permanent magnet in the vibration direction. The vibration of the permanent magnet can be further stabilized.

  A power generation device according to a fourth aspect of the present invention is the power generation device according to the second or third aspect, wherein the elastic member, the power generation permanent magnet, and the first holding permanent magnet are linearly arranged. It is characterized by that.

  In the power generation device according to claim 4, since the elastic member, the power generation permanent magnet, and the first holding permanent magnet are linearly arranged, it is easy to set the elastic force of the elastic member, and the power generation permanent magnet is smooth. The apparatus can be made compact.

  A power generator according to a fifth aspect of the present invention is the power generator according to any one of the second to fourth aspects, wherein the permanent magnet for power generation is disposed inside the coil. It is said.

  In the power generation device according to claim 5, since the power generation permanent magnet is arranged inside the coil, the power generation efficiency can be improved and the device can be configured compactly.

  A power generation apparatus according to a sixth aspect of the present invention is the power generation apparatus according to any one of the second to fifth aspects, further comprising a case constituting a main body of the apparatus, wherein the coil is supported by the case, and One end of the elastic member is directly or indirectly locked to the power generation permanent magnet and the other end is locked to the case, and the second holding permanent magnet is fixed to the case. It is characterized by that.

  According to a sixth aspect of the present invention, the coil is supported by the case, and the second holding permanent magnet is fixed to the case. The second holding permanent magnet causes the first holding permanent magnet and thus the power generation permanent. The magnet is held by magnetic levitation. Further, one end of the elastic member is directly or indirectly locked to the power generation permanent magnet, and the other end is locked to the case. Therefore, for example, if the case is attached to a human body or a vehicle body, the power generation permanent magnet can be vibrated by the vibration of the human body or the vehicle body, and an induced current can be generated in the coil. Thus, since the apparatus is unitized by the case, handling is easy.

  As described above, in the power generation device of the present invention, loss due to friction does not occur in the displacement of the coil or power generation permanent magnet, and the coil or power generation permanent magnet can be stably displaced in a predetermined direction.

<First Embodiment>
FIG. 3 is an exploded perspective view showing the configuration of the power generation device 10 according to the first embodiment of the present invention.

  The power generation device 10 is a type of power generation device that generates power by vibration, and includes a case 12 that constitutes the device body. The case 12 is formed in a box shape having a bottom wall and a side wall, and the opening of the case 12 is closed by a cover (not shown).

  A pair of fixing portions 14 formed in a prismatic shape is formed on the bottom wall of the case 12 so as to project, and second holding permanent magnets 16 and 18 formed in a cylindrical shape at the upper ends of the fixing portions 14. Are fixed coaxially with each other. As shown in FIG. 2, each of the pair of second holding permanent magnets 16 and 18 has an accommodation hole 15 in each cylinder, an N pole (positive electrode) 17 is formed in the inner peripheral portion, and an S in the outer peripheral portion. The pole (negative electrode) 19 is formed.

  In addition, the power generation device 10 includes a drive unit 20. The drive unit 20 is formed in a long cylindrical shape as a whole, and is disposed coaxially with the pair of second holding permanent magnets 16 and 18. The drive unit 20 includes a power generation permanent magnet 22 formed in a cylindrical shape. The permanent magnet 22 for power generation has an N pole (positive electrode) formed on one side in the axial direction and an S pole (negative electrode) formed on the other end side in the axial direction (the N pole and the S pole are along the axial direction). Arranged, see FIG. 1).

  A first connecting member 24 formed in a cylindrical shape having the same diameter as the power generation permanent magnet 22 is provided on one side in the axial direction of the power generation permanent magnet 22. On the other side in the axial direction of the first connecting member 24, a male screw 28 is coaxially formed. The male screw 28 is inserted into the cylinder of the power generation permanent magnet 22, and the tip portion projects to the other side in the axial direction of the power generation permanent magnet 22. In addition, a columnar support portion 30 is coaxially formed on one side of the first connecting member 24 in the axial direction.

  On the other hand, on the other side in the axial direction of the power generation permanent magnet 22, a second connecting member 32 formed in a cylindrical shape having the same diameter as the power generation permanent magnet 22 is provided. A female screw 36 is formed at the axial center of the second connecting member 32. The distal end portion of the male screw 28 of the first connecting member 24 is screwed into the female screw 36, and the power generation permanent magnet 22, the first connecting member 24, and the second connecting member 32 are integrally connected. Has been. Further, on the other side in the axial direction of the second connecting member 32, a support portion 38 formed in a columnar shape is formed so as to protrude coaxially.

  Furthermore, the axial side of the first connecting member 24 and the other side of the second connecting member 32 in the axial direction (both sides in the axial direction of the permanent magnet for power generation 22) are respectively cylindrical with the same diameter as the permanent magnet for power generation 22. The formed first holding permanent magnets 40 and 42 are provided.

  The support portion 30 of the first connecting member 24 is inserted into the cylinder of the first holding permanent magnet 40, so that the first holding permanent magnet 40 is coaxial with the first connecting member 24. It is supported by. Further, the support portion 38 of the second connecting member 32 is inserted into the cylinder of the other first holding permanent magnet 42, so that the first holding permanent magnet 42 is connected to the second connecting member 32. It is supported coaxially.

  As shown in FIG. 2, the pair of first holding permanent magnets 40 and 42 has a configuration in which an N pole (positive electrode) 41 is formed on the outer peripheral portion and an S pole (negative electrode) 43 is formed on the inner peripheral portion. Are accommodated inside (in the cylinder) of the second holding permanent magnets 16 and 18, respectively.

  On the other hand, a first torsion coil spring (elastic member) 44 is provided on one side in the axial direction of the drive unit 20 (one side in the axial direction of the first holding permanent magnet 40). One end of the first torsion coil spring 44 in the axial direction is locked to the side wall of the case 12, and movement in the radial direction is restricted by a columnar locking portion 46 formed to protrude from the side wall of the case 12. Yes.

  The other end of the first torsion coil spring 44 in the axial direction is locked to one end of the first holding permanent magnet 40 in the axial direction, and the diameter of the first torsion coil spring 44 by the support portion 30 penetrating the first holding permanent magnet 40. Movement in the direction is restricted. The first torsion coil spring 44 biases the drive unit 20 to the other side in the axial direction.

  A second torsion coil spring (elastic member) 48 having the same elastic force as the first torsion coil spring 44 is provided on the other side in the axial direction of the drive unit 20 (the other side in the axial direction of the first holding permanent magnet 42). It has been. The other axial end of the second torsion coil spring 48 is locked to the side wall of the case 12, and the movement in the radial direction is restricted by a columnar locking portion 50 protruding from the side wall of the case 12. ing.

  One end portion in the axial direction of the second torsion coil spring 48 is locked to the other end portion in the axial direction of the first holding permanent magnet 42, and the diameter thereof is supported by the support portion 38 penetrating the first holding permanent magnet 42. Movement in the direction is restricted. The second torsion coil spring 48 biases the drive unit 20 to one side in the axial direction.

  Further, the power generation apparatus 10 includes a coil 52 wound around the permanent magnet 22 for power generation. The coil 52 has an inner diameter that is slightly larger than the outer diameter of the power generation permanent magnet 22, and is disposed coaxially with the power generation permanent magnet 22. A capacitor (not shown) is connected to one end of the coil 52 in the winding direction via a rectifier circuit (not shown).

  Here, in the power generation apparatus 10 according to the first embodiment, the drive unit 20 normally has the urging force of the first torsion coil spring 44 and the second torsion coil spring 48 balanced, which is normally shown in FIG. ) Is held in the neutral position.

  Further, in the power generation apparatus 10, as described above, the pair of first holding permanent magnets 40 and 42 of the drive unit 20 are accommodated in the receiving holes 15 of the pair of second holding permanent magnets 16 and 18 fixed to the case 12. Although the magnetic poles of the outer peripheral portions of the pair of first holding permanent magnets 40 and 42 and the magnetic poles of the inner peripheral portions of the receiving holes 15 are the same N pole, As shown in FIG. 2, the permanent magnets 40 and 42 are held by magnetic levitation in the receiving holes 15 of the pair of second holding permanent magnets 16 and 18.

  In addition, in this state, the drive unit 20 (the pair of first holding permanent magnets 40 and 42) is held coaxially with the pair of second holding permanent magnets 16 and 18, and in its own axial direction. Therefore, when any external force along the axial direction acts on the drive unit 20, the drive unit 20 vibrates in the axial direction by the urging force of the first torsion coil spring 44 and the second torsion coil spring 48. (Reciprocating movement).

  Next, the operation of the first embodiment will be described.

  In the power generation apparatus 10 configured as described above, when vibration (see arrow V in FIG. 1A) is applied to the case 12, this vibration is transmitted to the drive unit 20, and FIG. 1B and FIG. As shown in FIG. 1, the drive unit 20 vibrates (reciprocates) in the axial direction by the urging force of the first torsion coil spring 44 or the second torsion coil spring 48 (indicated by arrow F in FIG. 1B and FIG. 1C). (See arrow R). As a result, the power generation permanent magnet 22 vibrates in the axial direction inside the coil 52, and an induced current is generated in the coil 52 by electromagnetic induction. This induced current is converted into a voltage signal by a rectifier circuit (not shown) and stored in a capacitor (not shown).

  Here, in the power generation apparatus 10 according to the first embodiment, the magnetic poles of the outer peripheral portions of the first holding permanent magnets 40 and 42 of the drive unit 20 and the second holding permanent magnet 16 fixed to the case 12. , 18 have the same polarity (in the first embodiment, N pole) as the magnetic poles of the inner peripheral portions (inner peripheral portions of the respective housing holes 15), the second holding permanent magnets 16, 18 Holds the drive unit 20 so as to vibrate in the axial direction (predetermined direction) by magnetic levitation. That is, since the vibration direction of the first holding permanent magnets 40 and 42 is limited in the axial direction by the second holding permanent magnets 16 and 18, the vibration of the power generation permanent magnet 22 (drive unit 20) is stabilized in the axial direction. (The power generation permanent magnet 22 can be prevented from vibrating in the radial direction). Thereby, for example, the inner diameter dimension of the coil 52 can be made small, and the distance between the power generation permanent magnet 22 and the coil 52 can be reduced, and the power generation efficiency can be improved.

  In addition, since the second holding permanent magnets 16 and 18 hold the first holding permanent magnets 40 and 42 by magnetic levitation, the first holding permanent magnets 40 and 42 and the second holding permanent magnet 16, No friction is generated between the permanent magnets 18 and 18 and no loss due to friction occurs in the vibration of the power generation permanent magnet 22.

  Furthermore, in the power generation device 10 according to the first embodiment, the first holding permanent magnets 40 and 42 and the second holding permanent magnet that limit the vibration of the power generation permanent magnet 22 (drive unit 20) in the axial direction. 16 and 18 are provided on both sides in the vibration direction of the power generation permanent magnet 22, so that the vibration direction of the power generation permanent magnet 22 can be more satisfactorily stabilized.

  Further, in the power generation apparatus 10 according to the first embodiment, the first torsion coil spring 44, the drive unit 20 (first holding permanent magnet 40, first connection member 24, power generation permanent magnet 22, second connection). Since the member 32, the first holding permanent magnet 42), and the second torsion coil spring 48 are linearly arranged, it is easy to set the elastic force of the first torsion coil spring 44 and the second torsion coil spring 48. The drive unit 20 (the permanent magnet 22 for power generation) can be vibrated smoothly and the apparatus can be configured compactly.

  Further, in the power generation apparatus 10 according to the first embodiment, since the power generation permanent magnet 22 is disposed inside the coil 52, the power generation efficiency can be improved and the apparatus can be configured compactly.

  Furthermore, in the power generation apparatus 10 according to the first embodiment, for example, if the case 12 is attached to a human body or a vehicle body, the drive unit 20 (the power generation permanent magnet 22) can be vibrated by the vibration of the human body or the vehicle body. Inductive current can be generated in the coil 52. Thus, since the apparatus is unitized by the case 12, handling is easy.

  As described above, in the power generation apparatus 10 according to the first embodiment of the present invention, no loss due to friction occurs in vibration (displacement) of the power generation permanent magnet 22, and the power generation permanent magnet 22 is stabilized. Can be vibrated in the axial direction (predetermined direction).

  In the power generation device 10 according to the first embodiment, the power generation permanent magnet 22 is disposed inside the coil 52. However, the configuration is not limited thereto, and the coil 52 has a diameter of the power generation permanent magnet 22. It is good also as a structure arrange | positioned at the direction side.

  Further, in the power generation apparatus 10 according to the first embodiment, the first torsion coil spring 44, the first holding permanent magnet 40, the power generation permanent magnet 22, the first holding permanent magnet 42, and the second torsion coil spring. For example, the first connecting member 24 and the second connecting member 32 are formed in a crank shape, so that the first torsion coil spring 44 and the first holding member 48 are arranged. The permanent magnet 40, the first holding permanent magnet 42, the second torsion coil spring 48, and the power generating permanent magnet 22 may be arranged so as to be displaced in the radial direction.

  Furthermore, in the electric power generating apparatus 10 according to the first embodiment, the first torsion coil spring 44 and the second torsion coil spring 48 are applied as the elastic members. However, the present invention is not limited to this. May be configured by applying a leaf spring, rubber or the like having one end locked to the side wall or bottom wall of the case 12 and the other end locked to the drive unit 20.

Furthermore, in the power generation apparatus 10 according to the first embodiment, the first holding permanent magnets 40 and 42 and the second holding permanent magnets 16 and 18 are provided on both sides in the axial direction of the power generation permanent magnet 22. Although not limited to this, the first holding permanent magnet 40 (or the first holding permanent magnet 44) and the second holding permanent magnet 16 (or the second holding permanent magnet 18) are omitted. It is good.
<Second Embodiment>
FIG. 4 is a schematic configuration diagram of a power generation device 60 according to the second embodiment of the present invention.

  The power generation device 60 is a rotary type power generation device using a motor or the like, and includes a coil 62 and a power generation permanent magnet 64 provided in the vicinity of the coil 62. The coil 62 is integrally connected with a first holding permanent magnet 66 that is formed in a columnar shape and forms a rotating shaft. In the first holding permanent magnet 66, the magnetic pole at the tip formed in a conical shape is the S pole 68, and the magnetic poles of the other portions are the N pole 70.

  Further, the power generation device 60 includes a second holding permanent magnet 72 that constitutes a bearing of the first holding permanent magnet 66. The second holding permanent magnet 72 includes a conical housing hole 74 that houses the tip (S pole 68) of the first holding permanent magnet 66. The second holding permanent magnet 72 has an N pole 76 on the side opposite to the first holding permanent magnet 66, and an S pole 78 on the first holding permanent magnet 66 side including the inner periphery of the accommodation hole 74. .

  Therefore, the second holding permanent magnet 72 is held so that the first holding permanent magnet 66 can rotate in a predetermined direction (around the axis) by magnetic levitation. As a result, when the coil 62 rotates together with the first holding permanent magnet 66, an induced current is generated in the coil 62 to generate power.

  Also in the power generation device 60 having the above configuration, loss due to friction does not occur in the rotation (displacement) of the coil 62, and the coil 62 is stably rotated in a predetermined direction (around the axis of the first holding permanent magnet 66). be able to. Instead of the coil 62, the power generation permanent magnet 64 may be integrally connected to the first holding permanent magnet 66 to rotate.

The structure of the electric power generating apparatus which concerns on the 1st Embodiment of this invention is shown, (A) is sectional drawing which shows the state with which the permanent magnet for electric power generation was hold | maintained in the neutral position, (B) is a permanent magnet for electric power generation. It is sectional drawing which shows the state which moved to the axial direction one side of the coil, (C) is sectional drawing which shows the state which the permanent magnet for electric power generation moved to the axial direction other side of the coil. It is sectional drawing which shows the structure of the peripheral member containing the 1st holding | maintenance permanent magnet and the 2nd holding | maintenance permanent magnet of the electric power generating apparatus which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view which shows the whole structure of the electric power generating apparatus which concerns on the 1st Embodiment of this invention. It is a schematic block diagram of the electric power generating apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Power generator 12 Case 16 2nd holding permanent magnet 18 2nd holding permanent magnet 22 Power generating permanent magnet 40 1st holding permanent magnet 42 1st holding permanent magnet 44 1st torsion coil spring (elastic member)
46 Second torsion coil spring (elastic member)
52 Coil 60 Power Generator 62 Coil 64 Permanent Magnet for Power Generation 66 First Holding Permanent Magnet 72 Second Holding Permanent Magnet

Claims (6)

A power generation device that includes a coil and a permanent magnet for power generation provided in the vicinity of the coil, and generates power by generating an induced current in the coil by displacing the coil or the permanent magnet for power generation in a predetermined direction. ,
A first holding permanent magnet integrally connected to the coil or the power generation permanent magnet;
A housing hole for housing at least a part of the first holding permanent magnet and having a magnetic pole having the same polarity as the magnetic pole of the housing portion outer periphery of the first holding permanent magnet in the inner periphery; A second holding permanent magnet for holding the first holding permanent magnet displaceably in the predetermined direction by magnetic levitation;
A power generator with An elastic member;
A permanent magnet for power generation supported by the elastic member so as to vibrate in a predetermined direction;
A coil that is provided in the vicinity of the power generation permanent magnet and generates an induced current by vibration of the power generation permanent magnet;
A first holding permanent magnet, wherein one of the positive pole and the negative pole is formed on the outer periphery, and is integrally connected to the power generating permanent magnet;
A housing hole formed along the predetermined direction, housing the first holding permanent magnet inside the housing hole, and having the same polarity as the magnetic pole of the outer peripheral portion of the first holding permanent magnet; A second holding permanent magnet having a magnetic pole formed in an inner peripheral portion of the accommodation hole and holding the first holding permanent magnet so as to vibrate in the predetermined direction by magnetic levitation;
A power generator with A pair of the first holding permanent magnets are provided on both sides of the power generation permanent magnet along the predetermined direction,
A pair of the second holding permanent magnets are provided corresponding to the pair of first holding permanent magnets,
The power generator according to claim 2.   4. The power generation device according to claim 2, wherein the elastic member, the power generation permanent magnet, and the first holding permanent magnet are linearly arranged. 5.   The power generation device according to any one of claims 2 to 4, wherein the power generation permanent magnet is disposed inside the coil. It has a case that constitutes the device body,
The coil is supported by the case,
The elastic member has one end directly or indirectly locked to the power generation permanent magnet and the other end locked to the case.
The second holding permanent magnet is fixed to the case.
The power generator according to any one of claims 2 to 5, wherein the power generator is provided.

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