JP2012016173A - Vibration generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generator which reduces a leak of a magnetic line to the outside of the vibration generator and suppresses electromagnetic damping force acting on a permanent magnet as much as possible.SOLUTION: The vibration generator 10 comprises: a housing 11 formed of a non-magnetic material; a cylindrical member 190 which is provided in the housing 11 and formed of a non-magnetic material; a coil 12 wound along the cylindrical member 190; a movable element 14 which is provided in the cylindrical member 190 so as to be moved back and forth in a longitudinal direction thereof and has the permanent magnet 15 that is polarized in the longitudinal direction thereof so that magnetic poles are different; and a film 100 which is formed so as to cover the housing 11. The film 100 has a two-layered structure formed by an insulation layer 110 and a conductive magnetic layer 120 in a thickness direction, and is wound at least one circle around the outer peripheral surface of the housing 11.

Description

  The present invention relates to a vibration generator that generates electric power by moving a permanent magnet.

  2. Description of the Related Art Conventionally, an electromagnetic induction vibration generator having a relatively simple structure is known as a power generator that converts kinetic energy into electric energy. For example, the vibration generator disclosed in Patent Document 1 includes a cylindrical coil housed in a cylindrical casing, a permanent magnet that is reciprocally movable in the coil, and a magnetic material that is disposed so as to cover the coil. A cylindrical member formed from the above. As the permanent magnet reciprocates in the coil, an induced electromotive force is generated in the coil.

  Further, in the vibration power generator, it is possible to reduce leakage of the magnetic lines of force generated from the permanent magnet to the outside by a cylindrical member formed from a magnetic material.

JP-A-7-177718

  The operation of the vibration generator will be described. Vibration is applied to the permanent magnet from the outside, and the permanent magnet moves in the cylindrical member. With the movement of the permanent magnet, the distribution of the lines of magnetic force emitted from the permanent magnet in the cylindrical member changes. When the cylindrical member is formed of a conductive soft magnetic material such as permalloy or silicon steel which is preferably used as a magnetic shield member, the cylindrical member is electrically closed. When the cylindrical member becomes a closed circuit, electromagnetic induction occurs between the moving permanent magnet and the cylindrical member, and current flows through the cylindrical member so as to reduce the change of the magnetic lines of force in the previous cylindrical member. . That is, the current flows so that the magnetic field lines are generated in the direction opposite to the direction of the magnetic field lines generated by the permanent magnet. The lines of magnetic force generated by the current flowing through the cylindrical member repel each other with the lines of magnetic force emitted from the permanent magnet. When the lines of magnetic force repel each other, the permanent magnet receives a force (hereinafter referred to as an electromagnetic braking force) in the direction opposite to the moving direction.

  The electromagnetic braking force Fl can be expressed as follows. However, the speed of the permanent magnet is Vm, and the electrical resistance of the cylindrical member is Rt.

  That is, the electromagnetic braking force Fl is proportional to the velocity Vm of the permanent magnet and inversely proportional to the electrical resistance Rt of the cylindrical member. Therefore, when the electrical resistance Rt of the cylindrical member is small, that is, when the cylindrical member is formed of a conductive member, a large electromagnetic braking force Fl is applied to the permanent magnet.

  As a result, the electromagnetic braking force Fl causes a problem that the kinetic energy of the permanent magnet is remarkably reduced, and the power generation efficiency of the vibration power generator is lowered.

  The present invention has been made in view of the above problems, and is a vibration generator that reduces the leakage of magnetic field lines to the outside and suppresses the electromagnetic braking force generated in the direction opposite to the direction in which the permanent magnet moves. The purpose is to provide.

  The vibration generator according to claim 1 is provided with a cylindrical member formed of a non-magnetic material, a coil wound along the cylindrical member, and reciprocally movable in the longitudinal direction in the cylindrical member. A mover having a permanent magnet magnetized so that the magnetic poles are different in the longitudinal direction, a film provided so as to cover the outer periphery of the coil, and being wound around the outer periphery of the coil by one or more rounds; The film has a two-layer structure of an insulating layer and a conductive magnetic layer in the thickness direction, and the conductive magnetic layer is formed of a soft magnetic material.

  According to a second aspect of the present invention, the vibration generator includes a casing that houses the permanent magnet, the cylindrical member, and the coil, and the film has plasticity.

  The vibration generator according to claim 3, wherein the permanent magnet has a columnar shape, the cylindrical member has a cylindrical shape, and the casing has a cylindrical shape, The central axis of each of the permanent magnet, the cylindrical member, and the housing is on the same axis, and the radial distance between the film and the central axis of the permanent magnet is equal. To do.

  The vibration generator according to claim 4, wherein the insulating layer is wound inside the conductive magnetic layer, the conductive magnetic layer is wound outside the insulating layer, and both surfaces of the insulating layer are adhered to each other. It is characterized by having sex.

  The vibration generator according to claim 5 is characterized in that the insulating layer is made of an insulating magnetic material.

  According to the vibration generator of the first aspect, the vibration generator is covered with the film formed by the insulating layer and the conductive magnetic layer. For this reason, the magnetic force lines emitted from the permanent magnet pass through the cylindrical member and the coil and are confined to the conductive magnetic layer in the film. Even when the film is wound around the outer periphery of the coil, the conductive magnetic layer does not become a closed circuit because an insulating layer exists between the conductive magnetic layers overlapping each other. Thereby, it is possible to provide a vibration generator that reduces the leakage of magnetic field lines to the outside and suppresses the electromagnetic braking force generated in the direction opposite to the direction in which the permanent magnet moves.

  According to the vibration generator of Claim 2, the housing | casing which accommodates a needle | mover, a cylindrical member, and a coil is provided. Thereby, a needle | mover, a cylindrical member, and a coil can be easily covered only by winding a plastic film around a housing | casing. As a result, the vibration generator provided with the film can be easily manufactured.

  According to the vibration generator of the third aspect, the distance between the central axis of the permanent magnet and the film is set to be equal in the radial direction. Since both the permanent magnet and the conductive magnetic layer are magnetic materials, the permanent magnet and the conductive magnetic layer attract each other. However, since the distance between the central axis of the permanent magnet and the film is equal in the radial direction, the magnetic force from the conductive magnetic layer is applied equally to the permanent magnet in the radial direction. When the magnetic force is evenly applied to the permanent magnet, the permanent magnet is not biased in one direction, and the slidability of the permanent magnet is improved. As a result, the power generation efficiency of the vibration power generator can be improved.

  According to the vibration generator of the fourth aspect, both surfaces of the insulating layer formed inside the vibration generator have adhesiveness. For this reason, joining of a housing | casing and an insulating layer and joining of a conductive magnetic layer and an insulating layer can be performed easily.

  According to the vibration power generator of the fifth aspect, the insulating layer is formed of an insulating magnetic material. For this reason, the lines of magnetic force generated from the permanent magnet pass through the cylindrical member and the coil and are confined in the insulating layer in addition to the conductive magnetic layer. Therefore, it is possible to provide a vibration generator in which the magnetic field lines are less likely to leak to the outside as compared with the case where the insulating layer is formed of an insulating nonmagnetic material.

It is a cross-sectional view of the vibration generator of this embodiment. It is sectional drawing cut | disconnected by the AA line of FIG. It is the elements on larger scale of the film of FIG. It is a figure which shows the iron foil of this embodiment, a double-sided adhesive film, and a housing | casing. It is a figure which shows the housing | casing and film of this embodiment. It is a figure which shows a mode that a film is wound around the housing | casing of this embodiment. It is a figure which shows the vibration generator by which the film of this embodiment was wound. It is a conceptual diagram which shows a mode that the magnetic force line emitted from the permanent magnet of this embodiment is confined in a conductive magnetic layer. It is a figure which shows the modification of the insulating layer of a film.

(Configuration of this embodiment)
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, a vibration generator 10 according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the vibration power generator 10 includes a casing 11, a cylindrical member 190, an electromagnetic induction coil 12 wound around the outer peripheral surface of the cylindrical member 190, and a permanent magnet 15. A mover 14 and a film 100 are provided. The vibration generator 10, the casing 11, the cylindrical member 190, the electromagnetic induction coil 12, the mover 14, and the permanent magnet 15 in the present embodiment are respectively the vibration generator, the casing, the cylindrical member, the coil, and the movable of the present invention. It is an example of a child and a permanent magnet.

  The casing 11 is formed in a cylindrical shape, and both ends thereof are open. Inside the casing 11, a cylindrical member 190, the electromagnetic induction coil 12, and the mover 14 are arranged.

  The cylindrical member 190 has a cylindrical shape and is housed inside the housing 11. In the present embodiment, the movement restricting portions 161 and 162 are disposed so as to cover both end portions of the cylindrical member 190 and both end portions of the housing 11, and are fixed to the housing 11.

  The movement restricting portions 161 and 162 are provided so that the mover 14 does not come out of the inner region 180 of the cylindrical member 190.

  The casing 11, the cylindrical member 190, and the movement restricting portions 161 and 162 are formed of a nonmagnetic material. In this embodiment, for example, the cylindrical member 190 is formed of polyacetal having an outer diameter of 9.0 mm, an inner diameter of 8.2 mm, and a length of 50 mm. In the present embodiment, the housing 11 is formed of, for example, an ABS resin having an outer diameter of 13 mm, an inner diameter of 11 mm, and a length of 50 mm. In the present embodiment, the movement restricting portions 161 and 162 are made of, for example, a disc-shaped member having an outer diameter of 13 mm and a thickness of 1.0 mm, and are made of acrylic resin.

  The electromagnetic induction coil 12 is wound and fixed along the outer peripheral surface of the cylindrical member 190 in a direction orthogonal to the longitudinal direction of the outer peripheral surface of the cylindrical member 190 (X direction in FIG. 1). Both ends of the electromagnetic induction coil 12 are connected to external wiring via a rectification unit and a power storage unit (not shown). The material of the electromagnetic induction coil 12 is a copper enameled wire or the like.

  In the present embodiment, as shown in FIG. 1, the electromagnetic induction coil 12 is provided by being wound around a part of the outer peripheral surface of the cylindrical member 190.

  As shown in FIG. 1, the mover 14 includes a permanent magnet 15. In the present embodiment, the permanent magnet 15 is a cylindrical neodymium magnet having an outer diameter of 8.0 mm and a length of 20 mm, but is not limited to this shape. However, the mover 14 desirably has the same cross-sectional shape as the inner region 180 of the cylindrical member 190.

  The central axis 16 of the permanent magnet 15, the central axis of the cylindrical member 190, and the central axis of the housing 11 are disposed on the same axis. The central axis 16 of the permanent magnet 15 in this embodiment is an example of the central axis of the permanent magnet of the present invention.

  The film 100 is a film having a two-layer structure including a conductive magnetic layer 110 and an insulating layer 120. The conductive magnetic layer 110 has conductivity and magnetism, and is, for example, a 25 μmt iron foil made of Sumitomo 3M FE-25C. The insulating layer 120 is electrically insulative and is, for example, a 25 μmt double-sided adhesive film made of Nitto Denko LUCIACS® CS9622T. The double-sided adhesive film is formed from an acrylic resin that is an insulating nonmagnetic material. The film 100 is provided by wrapping around the outer peripheral surface of the housing 11 about 20 times. The film 100, the conductive magnetic layer 110, and the insulating layer 120 in this embodiment are examples of the film, the conductive magnetic layer, and the insulating layer of the present invention, respectively.

  As shown in FIG. 2, the central axis 16 of the permanent magnet 15 and the conductive magnetic layer 110 are equidistant from each other in any radial direction. In this case, the equidistance allows an error for one film.

  The length of the film 100 in the X direction is the same as the length of the housing 11 in the X direction. Further, as shown in FIG. 3 which is a partially enlarged view of FIG. 2, in a state where the film 100 is wound around the housing 11, the insulating layer 120 is interposed between the overlapping conductive magnetic layers 110 (arrows in FIG. 3). Due to the interposition, the conductive magnetic layer 110 becomes an open circuit.

  A method for manufacturing and mounting the film 100 of the vibration power generator 10 will be described with reference to FIGS. 4, 5, 6 and 7. As shown in FIG. 4, the iron foil constituting the conductive magnetic layer 110, the double-sided adhesive film constituting the insulating layer 120, and the housing 11 are prepared, and the double-sided adhesive film constituting the insulating layer 120 is provided on one side 121. The iron foil which comprises the electroconductive magnetic layer 110 is stuck. When the iron foil is attached to the double-sided adhesive film as shown in FIG. 5, the number of windings is 20 while the surface of the double-sided adhesive film to which the iron foil is not attached is attached to the outer peripheral surface of the housing 11 as shown in FIG. 6. Wrap until the times are reached. As shown in FIG. 7, when the film 100 is wound around the housing 11, the vibration generator 10 of the present embodiment is completed.

(Operation of this embodiment)
Here, operation | movement of the vibration generator 10 of this embodiment is demonstrated using FIG. First, the vibration generator 10 is vibrated in the longitudinal direction of the cylindrical member 190 (X direction in FIG. 1). The force applied to the vibration generator 10 by the vibration is transmitted to the mover 14 as kinetic energy. The mover 14 reciprocates in the longitudinal direction in the inner region 180 of the cylindrical member 190 and enters and leaves the space covered by the electromagnetic induction coil 12.

  When passing through the space in the electromagnetic induction coil 12, the magnetic lines of force generated from the mover 14 provided with the permanent magnet 15 are orthogonal to the electromagnetic induction coil 12, and an induced current as an induced electromotive force is generated at that time. An alternating current can be generated when the mover 14 repeatedly enters and leaves the space in the electromagnetic induction coil 12.

(Effect of this embodiment)
The electromagnetic induction coil 12, the mover 14, and the cylindrical member 190 are covered with a film 100 formed of the insulating layer 110 and the conductive magnetic layer 120. For this reason, as shown in FIG. 8, the lines of magnetic force generated from the permanent magnet 15 pass through the cylindrical member 190 and the electromagnetic induction coil 12 and are confined in the conductive magnetic layer 120. Therefore, leakage of magnetic field lines to the outside of the vibration power generator 10 can be reduced. In this case, the outside of the vibration power generator 10 means the outside of the region surrounded by the film 100 and the movement restricting portions 161 and 162. Further, as shown in FIG. 3, since the insulating layer 110 exists between the overlapping conductive magnetic layers 120, the conductive magnetic layer 110 does not become an electrically closed circuit. Therefore, it is difficult for a current that generates a magnetic force line in the direction opposite to the magnetic force line generated by the permanent magnet 15 to flow in the film 100. Therefore, the electromagnetic braking force generated in the conductive magnetic layer 110 is reduced. That is, the electromagnetic braking force generated in the direction opposite to the direction in which the permanent magnet 15 moves is reduced. As a result, the kinetic energy of the permanent magnet 15 is not easily lost, and the power generation efficiency of the vibration power generator 10 is improved. In this way, it is possible to provide a vibration generator that reduces the leakage of magnetic field lines to the outside and suppresses the electromagnetic braking force applied to the permanent magnet 15 as much as possible.

  In the vibration power generator 10, a film 100 is wound around a case 11 having rigidity. As a result, as shown in FIGS. 4, 5, 6, and 7, the film 100 is easily wound around the outer peripheral surface of the housing 11, so that the film 100 can be easily wound around the movable element 14, the cylindrical member 190, and the electromagnetic induction. The coil 12 can be covered around. As a result, the vibration generator 10 including the film 100 can be easily manufactured.

  Since the permanent magnet 15 and the conductive magnetic layer 110 are both magnetic materials, the permanent magnet 15 and the conductive magnetic layer 110 attract each other. However, as shown in FIG. 2, the distance between the film 100 and the central axis 16 of the permanent magnet 15 is arranged to be equal in any radial direction. Therefore, the magnetic force from the conductive magnetic layer 110 is equally applied to the permanent magnet 15 in the radial direction. When the magnetic force is equally applied to the permanent magnet 15, the permanent magnet 15 is not biased in one direction, and the slidability of the permanent magnet 15 is improved. As a result, the power generation efficiency of the vibration power generator 10 can be improved.

  Moreover, both surfaces of the insulating layer 110 formed inside the film 100 have adhesiveness. Therefore, as shown in FIGS. 4, 5, 6, and 7, in the manufacturing process of the vibration power generator 10, the bonding between the casing 11 and the insulating layer 110, and the conductive magnetic layer 120 and the insulating layer 110 are connected. Bonding can be easily performed. As a result, the vibration generator 10 including the film 100 can be easily manufactured.

(Modification)
In addition, this invention is not limited to embodiment mentioned above, You may add a various change in the range which does not deviate from the summary of this indication.

  Although the insulating layer of this embodiment is formed of an insulating nonmagnetic material, it may be formed of an insulating magnetic material. The insulating magnetic material is a material having magnetism and insulating properties. For example, as shown in FIG. 9, the insulating magnetic material 130 is a mixture of a magnetic material powder 131 and an insulating material 132 having plasticity. The magnetic material powder 131 is, for example, a Ni—Zn ferrite magnetic powder, and the insulating material 132 is, for example, synthetic rubber. As a result, the lines of magnetic force generated from the permanent magnet 15 pass through the cylindrical member 190, the electromagnetic induction coil 12, and the housing 11, and are confined in the conductive magnetic layer 110 and the insulating magnetic material 130. Further, since the insulating material 132 is interposed between the magnetic material powder 131 and the magnetic material powder 131, the conductive magnetic layer 110 does not become a closed circuit. Therefore, it is possible to provide a vibration generator in which the magnetic field lines are less likely to leak to the outside as compared with the case where the insulating layer is formed of an insulating nonmagnetic material. The insulating magnetic material 130 in this embodiment is an example of the insulating magnetic material of the present invention.

  In this embodiment, the magnetic material powder 131 is a Ni—Zn-based ferrite magnetic powder. However, if the insulating material 132 maintains the insulation between the powders, the magnetic material powder 131 may be a Mn—Zn-based ferrite magnetic powder. Good. Moreover, although the insulating material 132 was a synthetic rubber, it should just be resin which has a role which binds magnetic material powder.

  In this embodiment, the thickness of the insulating layer and the thickness of the conductive magnetic layer are uniform, but the vicinity of both ends in the longitudinal direction of the cylindrical member is thick, and the longitudinal direction of the cylindrical member is The shape near the center may be thin. Thereby, even when the permanent magnet moves near both ends of the cylindrical member, the magnetic lines of force generated from the permanent magnet are less likely to leak to the outside. Conversely, the shape near the both ends in the longitudinal direction of the tubular member may be thin, and the shape near the center in the longitudinal direction of the tubular member may be thick.

  In the present embodiment, both the conductive magnetic layer 110 and the insulating layer 120 have a thickness of 25 μmt. However, it is not limited to this, and it may be thinner or thicker than 25 μmt. If the thickness of the conductive magnetic layer 110 or the thickness of the insulating layer 120 is less than 25 μmt, the thickness of the entire film 100 becomes thin. Therefore, the radial direction from the central axis 16 of the permanent magnet 15 to the conductive magnetic layer 110 is reduced. The error in the distance is reduced, and the permanent magnet is not further biased in one direction due to the magnetic adhesion between the permanent magnet 15 and the conductive magnetic layer 110. Thereby, the slidability of the permanent magnet 15 in the cylindrical member 190 is further improved, and the power generation efficiency of the vibration power generator is further improved. If the thickness of the conductive magnetic layer 110 is greater than 25 μmt, the magnetic lines of force generated from the permanent magnet 15 are further confined. Therefore, the magnetic field lines are more difficult to leak to the outside.

  In the present embodiment, both the conductive magnetic layer 110 and the insulating layer 120 have a thickness of 25 μmt. However, the present invention is not limited to this, and the thickness of the conductive magnetic layer 110 and the thickness of the insulating layer 120 may be different.

  In this embodiment, the insulating layer 120 is a double-sided pressure-sensitive adhesive film, and due to the adhesive strength of the double-sided pressure-sensitive adhesive film, the housing 11 and the insulating layer 110 are joined, and the conductive magnetic layer 120 and the insulating layer 110 are joined. , Went. However, for example, the insulating layer 120 is made of a non-adhesive resin film, and an adhesive is applied between the casing 11 and the insulating layer 110 and between the conductive magnetic layer 120 and the insulating layer 110. You can go there.

  In addition, in this embodiment, although the film is wound around the housing | casing 20 times, as long as it winds 1 round or more, it may be wound how many times. However, as the number of windings of the film increases, the magnetic field lines are less likely to leak. Therefore, the film may be wound as many times as 30 times and 40 times. Further, the ease of leakage of magnetic lines of force depends on the magnetic force of the permanent magnet, the thickness of the conductive magnetic layer, the distance from the permanent magnet to the film, and the like. That is, in order to prevent leakage of magnetic field lines, it is necessary to increase the number of times the film is wound when the magnetic force of the permanent magnet is larger than the magnetic force of the permanent magnet 15 of the present embodiment. Further, in order to prevent the leakage of magnetic field lines, it is necessary to increase the number of windings of the film when the thickness of the conductive magnetic layer is smaller than the thickness of the conductive magnetic layer 110 of the present embodiment. In order to prevent magnetic field leakage, it is necessary to increase the number of windings of the film when the distance from the permanent magnet to the film is shorter than in this embodiment.

  Moreover, although the length of the X direction of the film 100 was the same length as the length of the X direction of the housing | casing 11, it is not restricted to this, The length of the X direction of the film 100 may be short or long. . However, if the length of the film 100 in the X direction is short, the lines of magnetic force emitted from the permanent magnet 15 by the film 100 are likely to leak. Further, when the length of the film 100 in the X direction is long, the magnetic lines of force generated by the permanent magnet 15 in the film 100 are attracted to the conductive magnetic layer 110 of the film 100 that is longer than the length of the casing 11 in the X direction. There is a possibility that magnetic field lines are likely to leak outside the generator. Therefore, it is desirable that the length of the film 100 in the X direction is approximately the same as the length of the housing 11 in the X direction.

  In the present embodiment, the vibration power generator 10 is manufactured by winding the plastic film 100 around the housing 11, but not limited to this, a rigid cylinder for taking a mold is prepared, A plastic and thermosetting film is wound around the cylinder, and heat is applied to the film in this state. Then, the heated film is hardened in a cylindrical shape, and a cylindrical member, a coil, and a permanent magnet are stored in the hardened film, and the cover is covered by the movement restricting portion, thereby eliminating the housing. However, it is possible to provide a vibration power generator that suppresses electromagnetic braking force while reducing leakage of magnetic field lines emitted from the permanent magnet.

  In addition, in this embodiment, although the film 100 was manufactured by sticking a double-sided adhesive film to iron foil, you may manufacture the film 100 by apply | coating an insulating material to iron foil.

  In the present embodiment, the conductive magnetic layer 110 is an iron foil, but may be any soft magnetic material such as permalloy or nickel. In this embodiment, the insulating layer 120 is an acrylic resin, but may be an insulator.

  In this embodiment, the casing 11, the cylindrical member 190, and the movement restricting portions 161 and 162 are ABS resin, polyacetal, and acrylic resin, respectively. However, the present invention is not limited thereto, and acrylic, ABS, polyacetal, and polyethylene A resin such as tarate, a ceramic such as alumina or glass, or an insulating nonmagnetic material may be used.

  In this embodiment, the cylindrical member 190 and the casing 11 are cylindrical, but are not limited to this shape, and may be other polygonal cylinders such as an elliptical cylinder and a square cylinder.

  In the present embodiment, the electromagnetic induction coil 12 is provided by being wound around a part of the outer peripheral surface of the cylindrical member 190. However, the present invention is not limited thereto, and the electromagnetic induction coil 12 may be provided over the entire outer peripheral surface of the cylindrical member 190 or may be provided at a plurality of locations.

  The number of permanent magnets 15 is not particularly limited, and a plurality of permanent magnets 15 may be arranged.

  In the present embodiment, the permanent magnet 15 is a neodymium magnet, but is not limited thereto, and may be a hard magnetic material such as a samarium cobalt magnet.

DESCRIPTION OF SYMBOLS 10 Vibration generator 11 Case 12 Electromagnetic induction coil 14 Movable element 15 Permanent magnet 16 Center axis 100 Film 110 Insulating layer 120 Conductive magnetic layer 130 Insulating magnetic material 190 Cylindrical member

Claims (5)

A cylindrical member formed of a non-magnetic material;
A coil wound along the tubular member;
A mover having a permanent magnet provided in the cylindrical member so as to be reciprocally movable in the longitudinal direction and magnetized so that the magnetic poles are different in the longitudinal direction;
A film that is provided so as to cover the outer periphery of the coil, and is wound around the outer periphery of the coil one or more times,
The film has a two-layer structure of an insulating layer and a conductive magnetic layer in the thickness direction,
The vibration power generator, wherein the conductive magnetic layer is made of a soft magnetic material. A housing for housing the permanent magnet, the cylindrical member, and the coil;
The vibration generator according to claim 1, wherein the film has plasticity. The permanent magnet has a cylindrical shape,
The cylindrical member has a cylindrical shape,
The housing has a cylindrical shape,
The central axis of each of the permanent magnet, the cylindrical member, and the housing is on the same axis,
The vibration generator according to claim 2, wherein the radial distance between the film and the central axis of the permanent magnet is equal. The insulating layer is wound inside the conductive magnetic layer,
The conductive magnetic layer is wound outside the insulating layer,
The vibration generator according to claim 2 or 3, wherein both surfaces of the insulating layer have adhesiveness.   The vibration generator according to claim 1, wherein the insulating layer is made of an insulating magnetic material.