JP2011172391A - Vibration generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that power generation efficiency is low because a magnet flux existing outside a permanent-magnet cylinder is only used for power generation in a configuration in which coils are provided only on the inner wall of a housing with respect to a vibration generator that generates power by the vibration of a cylindrical permanent magnet provided in a cylinder housing. <P>SOLUTION: Inner coils 4 are provided at the center of the inside of a housing 2. A cylindrical magnet 6 is externally inserted into the inner coils 4. Each outer coil 8 wound in a direction opposite to the winding direction of the inner coil 4 is provided outside the cylindrical magnet 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vibration generator provided with a mover having a fixed coil and a permanent magnet.

  Conventionally, there is a generator in which a fixed coil and a permanent magnet movable in the case are accommodated in a cylindrical case. In accordance with the movement of the permanent magnet, the magnetic path formed in the coil changes and electric power is generated. For example, Patent Document 1 describes a generator in which a coil is accommodated in an inner wall portion of a casing, and a cylindrical permanent magnet is fitted and inserted into a central shaft provided inside the casing. This generator describes a technique in which when a permanent magnet is reciprocated in a casing along a central shaft body, the magnetic flux across the coil changes and current is induced in the coil.

JP-A-7-177718

  However, since the coil of the generator described in Patent Document 1 is only provided on the inner wall portion of the casing, only the magnetic flux existing between the permanent magnet on the side facing the coil provided on the inner wall portion can generate power. Not used. In the case where the permanent magnet has a cylindrical shape, there is a magnetic flux in a region other than the region facing the inner wall portion, but the magnetic flux crossing the coil is only the magnetic flux in the region facing the inner wall portion. Was low.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vibration generator that can efficiently use the magnetic flux of a permanent magnet and can generate power efficiently.

  In order to achieve this object, the vibration generator according to claim 1 includes a cylindrical mover having a permanent magnet capable of reciprocating in a predetermined direction, and a fixed coil in which the magnetic flux of the permanent magnet intersects. The stationary coil includes an outer coil wound outside the outer periphery of the mover and an inner coil wound inside the inner periphery of the mover.

  The vibration generator according to claim 2, wherein the outer coil and the inner coil have opposite winding directions opposite to each other in a direction orthogonal to the longitudinal direction, and the outer coil and the inner coil The coils are connected in parallel.

  The vibration generator according to claim 3, wherein the outer coil and the inner coil are divided into a plurality of regions along the longitudinal direction, and the fixed coil in one region of the plurality of regions is provided. The winding direction and the winding direction of the fixed coil in the other region adjacent to the one region are opposite to each other, and the outer coil in each region facing each other in the direction orthogonal to the longitudinal direction And the length of the inner coil in the longitudinal direction are the same.

  Further, in the vibration power generator according to claim 4, in each region of the inner coil and the outer coil, the length in the longitudinal direction of the one region and the other region adjacent to the one region is the same. It is characterized by being.

  The vibration generator according to claim 5 includes a hollow center part into which an axial core of a magnetic material can be inserted at the center of the first cylindrical member made of a nonmagnetic material around which the inner coil is wound. It is characterized by.

  In the vibration generator according to claim 1, since the coil is wound around the outer periphery and the inner periphery of the cylindrical mover, it exists on both sides of the outer periphery and the inner periphery of the mover. Compared to the case of generating power using only the outer magnetic flux, the magnetic fluxes on both the outer and inner sides of the mover can be used, and high power can be obtained.

  Further, in the vibration generator according to claim 2, the outer coil and the inner coil are wound in opposite directions, and the outer coil and the inner coil are connected in parallel, thereby generating the outer coil and the inner coil. The electromotive force to be added is added, and a large electric power can be obtained.

  Further, in the vibration power generator according to claim 3, the coils in the adjacent regions of the coils divided into the plurality of regions are wound in opposite directions, and the longitudinal direction of the inner coil and the outer coil in each region facing each other. Therefore, when the magnetic flux of the mover crosses the inner coil and the outer coil, it is possible to reduce the deviation of the polarity of the voltage generated in the opposing coils in the direction orthogonal to the longitudinal direction. Compared with the case where the lengths in the longitudinal direction of the inner coil and the outer coil in the respective opposing regions are different, it is possible to perform power generation with higher efficiency.

  In the vibration power generator according to claim 4, since the lengths of the adjacent regions of the outer coil and the inner coil are the same, when the magnetic flux of the mover crosses the coil having the same length of each region. The deviation of the polarity of the voltage generated by the coils in the adjacent regions is reduced, and highly efficient power generation can be performed.

  Further, in the vibration power generator according to claim 5, the inner coil is configured such that an axial core of a magnetic material can be inserted into the central portion of the first cylindrical member, and decreases as the distance from the permanent magnet increases. The magnetic flux density that crosses the magnetic material can be attracted by the axis of the magnetic material, and highly efficient power generation can be performed.

1 is a longitudinal sectional view of a vibration power generator 1 in Embodiment 1. FIG. It is an expanded sectional view of the arrow direction which follows the XX line of the said vibration generator 1. FIG. 2 is a longitudinal sectional view showing a magnetic flux of a cylindrical magnet 6 of the vibration power generator 1. FIG. It is a graph which shows the maximum magnetic flux density of the said vibration generator 1 at the time of setting the center part of the 1st cylindrical member 3 shown in FIG. It is a longitudinal cross-sectional view of the vibration generator 100 in Embodiment 2. It is an expanded sectional view showing the modification of the cylindrical magnet in Embodiment 1. It is an expanded sectional view showing the modification of the cylindrical magnet in Embodiment 1.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[Embodiment 1]
<Structure of vibration generator>
FIG. 1 is a longitudinal sectional view showing an outline of the configuration of the vibration power generator 1 according to the first embodiment. FIG. 2 is an enlarged cross-sectional view in the direction of the arrow according to the XX line of FIG. In the first embodiment, the following will be described with the vertical direction and the horizontal direction defined as shown in FIG.

  In the vibration generator 1 shown in FIG. 1, a first cylindrical member 3 extending in the left-right direction, which is the longitudinal direction of the casing 2, is provided in the center of the stainless steel cylindrical casing 2 made of magnetic material. It is done. The first cylindrical member 3 is formed of a resin material, and a cylindrical hollow is formed at the center. The first tubular member 3 is provided with four flanges that divide the left and right direction into three equal parts of the inner regions 3a, 3b, and 3c. In the inner regions 3a to 3c of the first cylindrical member 3, an inner coil 4 is formed by winding a continuous enamel wire or the like. In the first embodiment, each of the inner regions 3a to 3c indicates a region where an enamel wire sandwiched between two flanges is wound. The winding direction of the inner coil 4 is the same direction as the inner regions 3a and 3c, and the inner region 3b is opposite to the inner regions 3a and 3c. This is one embodiment in which the inner region of the first cylindrical member 3 is three.

  When the direction in which the inner coil 4 is wound is set as clockwise R1 and counterclockwise L1 as shown by the arrow direction in FIG. 2, the inner coil 4 is rotated clockwise R1 in the inner regions 3a and 3c. Wound uniformly in the entire direction. In the inner region 3b, the inner coil 4 is uniformly wound over the entire area in the direction of the counterclockwise L1. Note that the winding direction of the inner coil 4 changes at the flange.

  A guide 5 is provided outside the first tubular member 3 around which the inner coil 4 is wound. The guide 5 may be configured to cover the outer circumferences of the first cylindrical member 3 and the inner coil 4, and in the first embodiment, a thin cylindrical member is used. The material of the guide 5 may be a non-magnetic material, and for example, an acrylic resin is used.

  A cylindrical magnet 6 which is a cylindrical permanent magnet is movably inserted into the guide 5. The length of the cylindrical magnet 6 in the left-right direction is substantially equal to the length in the left-right direction of the inner regions 3a to 3c. The cylindrical magnet 6 is magnetized in the left-right direction so that the left direction is the N pole and the right direction is the S pole.

  In the housing 2, the second cylindrical member 7 made of a nonmagnetic material such as acrylic resin is provided outside the region where the cylindrical magnet 6 is inserted. The second cylindrical member 7 has a hollow cylindrical shape at the center, and the first cylindrical member 3, the inner coil 4, the guide 5, and the cylindrical magnet 6 are provided inside the center. It is the structure which is made. As with the first tubular member 3, the second tubular member 7 is provided with four flanges that equally divide the left-right direction into three outer regions 7a, 7b, 7c. The outer regions 7a, 7b, 7c are provided so as to be in the same position as the inner regions 3a, 3b, 3c in the left-right direction. The left and right lengths of the outer regions 7 a to 7 c and the inner regions 3 a to 3 c are substantially the same as the horizontal length of the cylindrical magnet 6. In the first embodiment, the first cylindrical member 3 and the second cylindrical member 7 are made of a nonmagnetic material acrylic resin. This is because the magnetic flux of the cylindrical magnet 6 is attracted to the first cylindrical member 3 and the second cylindrical member 7 of magnetic material, and the magnetic flux crossing the inner coil 4 and the outer coil 8 is reduced. This is to prevent it.

  In the outer regions 7 a to 7 c of the second cylindrical member 7, an outer coil 8 is formed by winding a continuous enamel wire or the like. The outer coil 8 is wound in a direction opposite to the direction in which the inner coil 4 is wound in each of the inner regions 3a to 3c facing the outer regions 7a to 7c. Specifically, the outer coil 8 is wound in the counterclockwise direction L1 in the outer regions 7a and 7c. The outer coil 8 is wound around the outer region 7b in the clockwise direction R1. Similar to the inner coil 4, the outer coil 8 is wound in the opposite direction with the flange of the second cylindrical member 7 as a boundary.

  The cylindrical magnet 6 is provided so as to be movable in the left-right direction within a space 2 a sandwiched between the guide 5 and the second cylindrical member 7. At both ends in the left-right direction of the casing 2, copper movement restricting portions 9 a and 9 b for preventing the cylindrical magnet 6 from jumping out from the casing 2 are disposed at fixed positions. When the movement restricting portions 9a and 9b of the disc are bonded to both ends of the housing 2 with an adhesive or the like, the space 2a becomes a sealed space.

  Both ends of the inner coil 4 and the outer coil 8 are connected so as to be connected in parallel, and further connected to the rectifying power storage unit 30 via a lead wire R. As shown in FIG. 1, the rectified power storage unit 30 includes a bridge diode 31 that is a rectifier circuit, a power storage unit 32, a positive electrode 33, and a negative electrode 34. The rectifying power storage unit 30 is provided in a case (not shown), but may be configured to be stored in a predetermined area other than the space 2 a in the housing 2. For example, the configuration in the casing 2 and the configuration of the rectifying power storage unit 30 may be accommodated in an existing battery size. The power storage means 32 is constituted by, for example, a capacitor, a secondary battery or the like. When the magnetic flux of the cylindrical magnet 6 crosses the inner coil 4 and the outer coil 8, an alternating current is generated and full-wave rectified by the bridge diode 31. Power storage and smoothing are performed by the power storage means 32 connected to the output side of the bridge diode 31. When a potential difference is generated between the positive electrode 33 and the negative electrode 34 connected to the power storage means 32, a smoothed current is supplied.

  FIG. 3 is a schematic enlarged view of the cylindrical magnet 6, the inner coil 4, and the outer coil 8 in the vibration generator 1 of FIG. 1. FIG. 3 shows the magnetic flux present in an arbitrary longitudinal section of the cylindrical magnet 6. The said cylindrical magnet 6 shows the state which moved in the said space 2a from the state shown in FIG. The magnetic flux outside the cylindrical magnet 6 is radiated from the N pole to the S pole toward the outer coil 8 side. The magnetic flux inside the cylindrical magnet 6 is radiated from the N pole to the S pole toward the inner coil 4 side. The inner and outer sides of the cylindrical magnet 6 are symmetrical in the direction of the magnetic flux across the inner coil 4 and the outer coil 8. Magnetic flux outside the cylindrical magnet 6 is radiated from the left side of the cylindrical magnet 6 to the outer coil 8 and is incident on the right side of the cylindrical magnet 6 from the outer coil 8 side. The magnetic flux inside the cylindrical magnet 6 is radiated from the left side of the cylindrical magnet 6 to the inner coil 4 and is incident on the right side of the cylindrical magnet 6 from the inner coil 4 side. The magnetic flux density existing around the cylindrical magnet 6 is substantially the same in any longitudinal section.

  When the cylindrical magnet 6 reciprocates in the left-right direction, the magnetic flux existing inside the cylindrical magnet 6 crosses the inner coil 4, and the magnetic flux existing outside the cylindrical magnet 6 crosses the outer coil 8. When the vibration generator 1 is operated as described later, the cylindrical magnet 6 is repeatedly reciprocated in the left-right direction. At this time, a change in magnetic flux occurs in the inner coil 4 and the outer coil 8, and electric power is generated.

  When the cylindrical magnet 6 reciprocates in the left-right direction in the housing 2, magnetic flux changes in the inner coil 4 and the outer coil 8, and electric power is generated. In the inner coil 4 and the outer coil 8 connected in parallel, in order to simultaneously flow the current in the same direction to one bridge diode 31, the winding direction of each of the inner coil 4 and the outer coil 8 is set to It must be defined and provided according to the orientation.

  That is, as described above, in the cylindrical magnet 6, the direction of the magnetic flux across the inner coil and the direction of the magnetic flux across the outer coil are different in the vertical direction. Therefore, the winding of the inner coil 4 and the outer coil 8 facing the cylindrical magnet 6 is performed so that a current flows in the same direction with respect to the inner coil 4 and the outer coil 8. Winding directions are wound in opposite directions. In the first embodiment, as shown in FIG. 3, the winding directions of the coils of the inner region 3a and the outer region 7a are opposite to each other, and the coils of the inner region 3b and the outer region 7b are wound. The winding directions are opposite to each other, and the winding directions of the coils of the inner region 3c and the outer region 7c are opposite to each other.

  In the left-right direction, the direction of the magnetic flux crossing the left inner coil and the outer coil on the N pole side of the cylindrical magnet 6 is different from the direction of the magnetic flux crossing the right inner coil and the outer coil on the S pole side. Therefore, the winding direction of the inner coil 4 or the outer coil 8 facing the left side of the cylindrical magnet 6 and the winding direction of the inner coil 4 or the outer coil 8 facing the right side of the cylindrical magnet 6 Must be reversed. For example, in the state of the cylindrical magnet 6 shown in FIG. 3, in order to reduce the deviation of the polarity of voltage generated in the inner regions 3a and 3b and the outer regions 7a and 7b, the inner region 3a. And 3b need to make the winding direction of the inner coil 4 opposite to each other, and the outer regions 7a and 7b need to make the winding direction of the outer coil 8 opposite to each other. From the above, the inner coil 4 and the outer coil 8 are formed according to the direction of the magnetic flux of the cylindrical magnet 6 that intersects with the inner regions 3a to 3c and the outer regions 7a to 7c. For each of 3a to 3c and 7a to 7c, a region facing in the vertical direction and a region adjacent to each other in the left-right direction are respectively wound around and arranged in opposite directions.

  The vibration generator 1 according to Embodiment 1 can effectively increase the power generation efficiency by providing a magnetic material at the center of the first cylindrical member 3. FIG. 4 shows a case where the central portion of the first cylindrical member 3 is hollow and a case where an axial core 13 made of a columnar magnetic material is inserted into the hollow of the central portion of the first cylindrical member 3. Are the conditions A and B, respectively, and the maximum magnetic flux density at each position between the central portion and the cylindrical magnet 6 and at each position between the cylindrical magnet 6 and the housing 2 in the conditions A and B. It is a comparison graph shown. In FIG. 4, the vertical axis represents the magnetic flux density [T], and the horizontal axis represents the distance [mm] from the central portion in the left-right direction orthogonal to the central portion of the first cylindrical member 3. In FIG. 4, as condition A, the maximum magnetic flux density when the shaft of the first cylindrical member 3 is hollow is indicated by diamond points. As the condition B, the maximum magnetic flux density when a shaft core made of supermalloy in which Mo (molybdenum) is added to permalloy made of Fe—Ni alloy is inserted into the first cylindrical member 3 is indicated by a round dot. Hereinafter, among the maximum magnetic flux density at each position shown in FIG. 4, the maximum magnetic flux density at each position between the central portion and the cylindrical magnet 6, which has a large difference with conditions A and B, will be described. As shown in FIG. 4, the maximum magnetic flux density at each position between the cylindrical magnet 6 and the housing 2 is not greatly different regardless of the presence or absence of the shaft core.

  Under the condition A, the magnetic flux density is about 0.05 at a position where the distance from the central portion is 0.5 mm. In the case of Condition B, the magnetic flux density at a position where the distance from the central portion is 0.5 mm is about 0.75. Compared to the condition A, since the shaft core 13 inserted into the first cylindrical member 3 in the condition B is made of a magnetic material, the maximum magnetic flux density in the vicinity of the first cylindrical member 3 is increased. Further, as shown in FIG. 4, it can be seen that the maximum magnetic flux density is higher in the condition B than in the condition A even at the intermediate position between the central portion and the cylindrical magnet 6. This is because the magnetic flux density that decreases with increasing distance from the cylindrical magnet 6 is attracted to the shaft core 13 made of a magnetic material provided at the central portion of the first cylindrical member 3 and increases.

  As shown in FIG. 4, in the condition B, the shaft core 13 made of a magnetic material is inserted into the first cylindrical member 3, so that the space between the first cylindrical member 3 and the cylindrical magnet 6 is reached. It is possible to effectively increase the maximum magnetic flux density. Moreover, the shaft core 13 may be made of, for example, stainless steel (SUS430) or iron other than Supermalloy.

<Operation of vibration generator>
Next, operation | movement of the vibration generator 1 of Embodiment 1 is demonstrated. When using the vibration generator 1, the user vibrates the housing 2 in the left-right direction. By vibrating, the external force applied to the vibration generator 1 is transmitted to the cylindrical magnet 6 as kinetic energy. The cylindrical magnet 6 reciprocates in the left-right direction in the space 2a at a speed given by a force obtained by combining a friction force between the external force and the housing 2, a resistance force from gas, and the like. When the cylindrical magnet 6 moves in the space 2 a sandwiched between the inner coil 4 and the outer coil 8, magnetic flux existing in the cylindrical magnet 6 crosses the inner coil 4 and the outer coil 8 and electromagnetic induction is performed. Occurs. The cylindrical magnet 6 reciprocates in the space 2a sandwiched between the inner coil 4 and the outer coil 8 to generate electricity.

[Embodiment 2]
Hereinafter, Embodiment 2 of the present invention will be described with reference to the drawings. The second embodiment is different from the first embodiment in that a plurality of permanent magnets are arranged opposite to each other with the same polarity and a fastened permanent magnet set is used as a mover. Since the configuration of the second embodiment is the same as that of the first embodiment with respect to the other parts, only the different configuration will be described in detail, and the description of the same configuration as that of the first embodiment will be omitted.

  FIG. 5 shows a vibration in which a cylindrical magnet set 106 in which the same poles of two cylindrical magnets 106 a and 106 b are opposed and fastened to the guide 5 in the housing 2 in the second embodiment is inserted. A longitudinal cross-sectional view of the generator 100 is shown. The rectifying power storage unit 30 and the lead wire R are not shown. In the cylindrical magnet set 106 according to the second embodiment, the south pole of the cylindrical magnet 106a and the south pole of the cylindrical magnet 106b are fixed by a fastening member (not shown). The length in the left-right direction, which is the longitudinal direction of each of the cylindrical magnet 106a and the cylindrical magnet 106b, is substantially the same as the length in the left-right direction of each of the inner regions 3a-3c and the outer regions 7a-7c. Since the cylindrical magnet set 106 is configured by two same-pole opposed magnets, the magnetic field in the vicinity of the fastening surface of the cylindrical magnet 106a and the cylindrical magnet 106b is permanent for one of the cylindrical magnets 106a or 106b. Since it is stronger than the magnetic field of only the magnet, it is possible to generate power with high efficiency even if the moving range of the mover in the housing 2 is shortened.

(Modification)
In the vibration generator 1 according to the first embodiment, the inner regions 3a to 3c and the outer regions 7a to 7c are formed of enameled wires partitioned by flanges in the first tubular member 3 and the second tubular member 7, respectively. Although it is a wound area | region, the definition of the area | region of the said inner area | regions 3a-3c and the said outer area | regions 7a-7c is not restricted to this. For example, among four flanges provided in the left-right direction, the total of one of the flanges and the area where the enamel wire sandwiched between the flange and the other flange is wound may be defined as one area. good.

  The vibration generator 1 according to the first embodiment has a circuit configuration in which the directions of the currents flowing through the inner coil 4 and the outer coil 8 are the same, and the inner coil 4 and the outer coil 8 are connected in parallel. However, the connection of the inner coil 4 and the outer coil 8 is not limited to parallel. Also in the first embodiment, the inner coil 4 and the outer coil 8 in regions facing each other are wound in the same direction, and currents in opposite directions flow through the inner coil 4 and the outer coil 8. Even if there is a circuit configuration in which the inner coil 4 and the outer coil 8 are connected to the rectifying power storage unit 30 provided separately, it is possible to generate power using the magnetic flux inside and outside the cylindrical magnet 6. is there.

  Further, in the vibration power generator 1 of the first embodiment, the cylindrical magnet 6 has a cylindrical configuration in which a through hole is provided only at the center, but the structure of the cylindrical magnet is not limited thereto. For example, as shown in FIG. 6A, the cylindrical magnet 600 is provided with a plurality of through holes 610 extending in the axial direction, or as shown in FIG. 6B, the through grooves extending in the axial direction on the inner periphery or outer periphery of the cylindrical magnet 700. 710 may be provided. By causing the through-hole 610 and the through-groove 710 to function as a vent, air resistance due to movement can be reduced, so that high kinetic energy can be obtained. Further, the inner coil 4 and the outer coil 8 can be provided close to each other, and more efficient power generation can be performed. 6A and 6B show a state where the shaft core 13 is inserted into the first cylindrical member 3.

  The vibration generator 1 according to the first embodiment has the above-described structure, but is not limited thereto. The shape of the vibration power generator 1 according to the first embodiment is not limited to a cylindrical shape as long as the permanent magnet can reciprocate, and may be a quadrangular prism shape or a polygonal prism shape. The material of the housing 2 is not limited to aluminum, and may be, for example, a metal such as copper or brass, or an acrylic resin. In particular, when the casing 2 is made of a magnetic material, the power generation efficiency is higher than when the casing 2 is made of a nonmagnetic material. Further, the housing 2 includes the movement restricting portions 9a and 9b, and can generate electric power even if it has a configuration not including a part and all of the cylindrical shape as long as the configuration allows the reciprocating movement of the permanent magnet. is there. Further, a buffer body made of an elastic material may be provided on the space 2a side of the movement restricting portions 9a and 9b provided at both ends of the housing 2. Examples of the elastic material include isobrene rubber, nitrile rubber, and butadiene rubber. By providing the buffer, it is possible to suppress damage to the cylindrical magnet 6 that reciprocates in the housing 2 during use. In addition, the cylindrical magnet 6 of the first embodiment is configured to be inserted into the guide 5 that covers the first cylindrical member 3 and the inner coil 4, but the first cylindrical shape is not provided with the guide 5. The structure inserted in the member 3 may be sufficient. As long as the shape of the cylindrical magnet 6 is cylindrical, it is not limited to a cylinder, and may be a polygonal cylindrical shape.

  The inner regions 3a to 3c and the outer regions 7a to 7c are preferably equal in length in the longitudinal direction, but are not necessarily equal, and the region is divided into three. It does not have to be a configuration. Even when the number of areas is one or two areas less than three, or even when the area is divided into four or more areas, it is possible to generate power. The inner coil 4 and the outer coil 8 that are wound may not have the same number of turns in each of the inner regions 3a to 3c and the outer regions 7a to 7c depending on the shape of the housing 2 and the convenience of design. .

  Moreover, although the said 1st cylindrical member 4 is a structure formed with an acrylic resin, it is not restricted to this. The flange of the said 1st cylindrical member 4 should just be the structure which is a nonmagnetic material at least. One of the second cylindrical members 8 is preferably made of a nonmagnetic material as a whole.

DESCRIPTION OF SYMBOLS 1,100 Vibration generator 3 1st cylindrical member 3a-3c Inner area | region 4 Inner coil 6 Cylindrical magnet 7a-7c Outer area | region 8 Outer coil 106 Cylindrical magnet group

Claims (5)

A cylindrical mover having a permanent magnet capable of reciprocating in a predetermined direction;
A fixed coil with which the magnetic flux of the permanent magnet intersects,
The fixed coil is composed of an outer coil wound outside the outer periphery of the mover and an inner coil wound inside the inner periphery of the mover. Machine. The outer coil and the inner coil have opposite winding directions opposite to each other in a direction orthogonal to the longitudinal direction,
The vibration generator according to claim 1, wherein the outer coil and the inner coil are connected in parallel. The outer coil and the inner coil are divided into a plurality of regions along the longitudinal direction.
The winding direction of the fixed coil in one region of the plurality of regions is opposite to the winding direction of the fixed coil in another region adjacent to the one region, and is orthogonal to the longitudinal direction. 3. The vibration generator according to claim 1, wherein the lengths of the outer coil and the inner coil in the longitudinal direction of the respective regions facing each other in the direction in which the first and second coils are opposed to each other are the same.   The length of the said longitudinal direction of each area | region of the said inner side coil and an outer side coil of the said one area | region and the other area | region adjacent to the said one area | region is the same. Vibration generator.   The center of the 1st cylindrical member which consists of a nonmagnetic material by which the said inner side coil is wound is equipped with the hollow center part which can insert the axial center of a magnetic material, The any one of Claims 1-4 characterized by the above-mentioned. The vibration generator described in 1.