WO2022113417A1 - Generator - Google Patents

Abstract

This generator (1) comprises: a holder (2) which has a storage space; a rotating shaft (3) which is rotatably supported by the holder; a rotating magnet (4) which is positioned in the storage space of the holder and is fixed to the rotating shaft; a non-magnetic tubular member (7) which is supported by the holder; a coil (8) which is positioned around the tubular member; and a magnetic body (6) which is positioned inside the tubular member and receives a magnetic force from the rotating magnet, thereby changing the direction of a magnetic field affecting the coil.

Description

Generator

The present invention relates to a generator.

As a technique using a generator, for example, Japanese Patent Application Laid-Open No. 2018-191417 (Patent Document 1) can be mentioned. Patent Document 1 discloses a vibration dynamo power generation device including an external magnet fixed to a pedal portion of a bicycle and a current generator fixed to a body portion of the bicycle and accommodating a spherical magnet inside. In the vibration dynamo device of Patent Document 1, since the current generator is arranged on the rotation trajectory of the external magnet, the spherical magnet inside the current generator vibrates and generates electricity just by rotating the pedal portion.

JP-A-2018-191417

The vibration dynamo device disclosed in Patent Document 1 generates electricity by vibrating the spherical magnet inside the current generator due to the orbital motion of the external magnet around the rotation axis of the pedal portion. Therefore, the electric power obtained for the labor required for the rotation of the pedal portion is relatively small, and improvement in power generation efficiency is desired.

An object of the present invention is to provide a generator with high power generation efficiency.

The generator according to one embodiment of the present embodiment includes a holder having a storage space, a rotating shaft rotatably supported by the holder, a rotating magnet arranged in the storage space of the holder and fixed to the rotating shaft, and a holder. A non-magnetic tubular member held in the cylinder, a coil arranged on the outer periphery of the tubular member, and a direction of a magnetic field arranged inside the tubular member and affecting the coil by receiving a magnetic force from a rotating magnet. It is equipped with a magnetic material that can be changed.

Preferably, the tubular member is provided close to the rotating magnet, and the magnetic material is a spherical magnet that rotates on its axis in response to the magnetic force from the rotating magnet.

Preferably, the axis of rotation of the spherical magnet is parallel to the axis of rotation.

Preferably, the rotation axis of the spherical magnet intersects the circumferential orbital plane of the coil.

Preferably, the rotating magnet is a cylindrical magnet.

Preferably, one end surface of the tubular member is close to the rotating magnet, and the central axis of the tubular member is orthogonal to the axis of rotation.

Preferably, a spacer made of a non-magnetic material for locating the spherical magnet at the center of the tubular member is arranged in the tubular member.

Preferably, the outer peripheral surface of the coil wound around the tubular member is close to the axis of rotation, and the central axis of the tubular member extends in a direction perpendicular to the axis of rotation at a position that does not intersect the axis of rotation. There is.

Preferably, the current generating portion including the tubular member, the coil, and the spherical magnet includes a first current generating portion and a second current generating portion provided at rotationally symmetric positions about the rotation axis. The spherical magnet includes a first spherical magnet arranged in the tubular member of the first current generating portion and a second spherical magnet arranged in the tubular member of the second current generating portion.

Preferably, the cylindrical rotating magnet is magnetized in two poles in the circumferential direction, and the spherical magnet is magnetized in two poles with a plane including the rotation axis of the spherical magnet as a boundary.

Preferably, the tubular member is arranged such that one end is close to the rotating magnet and the other end is away from the rotating magnet, so that the magnetic body receives the magnetic force from the rotating magnet and reverses the direction of magnetism. It is a magnetic core of a soft magnetic material that repeats.

Preferably, it further comprises a yoke of soft magnetic material that abuts on at least one end or the other end of the magnetic core and is held in the holder.

Preferably, the current generating portion including the cylindrical member, the coil, and the magnetic core includes a first current generating portion and a second current generating portion provided at rotationally symmetric positions about the rotation axis.

Preferably, the tubular member has one end and the other end, the outer peripheral surface thereof is arranged close to the rotating magnet, and the magnetic body receives the magnetic force from the rotating magnet and reverses the direction of magnetism. A magnetic core of a soft magnetic material that repeats the above steps, and the generator further comprises a yoke of the soft magnetic material that abuts on one end and the other end of the magnetic core and is held in a holder.

Preferably, the outer peripheral surface of the coil wound around the tubular member is close to the axis of rotation, and the central axis of the tubular member extends in a direction perpendicular to the axis of rotation at a position that does not intersect the axis of rotation. There is.

Preferably, the current generating portion including the cylindrical member, the coil, the magnetic core, and the yoke has a first current generating portion and a second current generating portion provided at rotationally symmetric positions about the rotation axis. include.

Preferably, the rotating magnet is a cylindrical magnet and is magnetized in two poles in the circumferential direction.

Preferably, the rotating shaft has at least one end exposed to the outside of the holder and a pinion at one end exposed from the holder.

According to the generator of the present invention, the power generation efficiency can be improved by using a rotating magnet that rotates around a rotating shaft and a spherical magnet that rotates by receiving a magnetic force from the rotating magnet.

Further, according to another aspect of the generator of the present invention, a rotating magnet that rotates about a rotation axis and a magnetic core of a soft magnetic material that repeatedly reverses the direction of magnetism by receiving a magnetic force from the rotating magnet are used. Therefore, the power generation efficiency can be improved.

It is a perspective view of the generator in Embodiment 1 of this invention. It is sectional drawing of the generator in Embodiment 1 of this invention, (a) is the front vertical sectional view, (b) is the sectional view along line IIb-IIb in FIG. 2 (a). It is a perspective view of the generator in Embodiment 2 of this invention. 2 is a cross-sectional view of the generator according to the second embodiment of the present invention, (a) is a vertical cross-sectional view, and (b) is a cross-sectional view taken along the line IVb-IVb in FIG. 4 (a). It is a perspective view of the generator in Embodiment 3 of this invention. It is sectional drawing of the generator in Embodiment 3 of this invention. It is a perspective view of the generator in Embodiment 4 of this invention. It is sectional drawing of the generator in Embodiment 4 of this invention. It is a perspective view of the generator in Embodiment 5 of this invention. It is sectional drawing of the generator in Embodiment 5 of this invention.

An embodiment of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated.

<Overview of the invention>
With reference to FIGS. 1 and 2, the generator 1 according to the present invention is arranged in a holder 2 having a storage space, a rotating shaft 3 rotatably supported by the holder 2, and a storage space of the holder 2. A rotating magnet 4 fixed to the rotating shaft 3, a non-magnetic tubular member 7 held in the holder 2, a coil 8 arranged on the outer periphery of the tubular member 7, and arranged in the tubular member 7. A magnetic body 6 that changes the direction of a magnetic field that affects the coil 8 by receiving a magnetic force from the rotating magnet 4 is provided.

In the following description, in the first and second embodiments, the magnetic body 6 is a spherical magnet 6 that rotates on its axis in response to a magnetic force from the rotating magnet 4. In the third, fourth, and fifth embodiments, the magnetic body 6 is a magnetic core 106 made of a soft magnetic material that repeatedly inverts the direction of magnetism by receiving a magnetic force from a rotating magnet 104.

As described above, the generator 1 according to the present invention can generate power only by changing the direction of the magnetic field in which the magnetic body 6 affects the coil 8, and can be a generator having high power generation efficiency with respect to movement. ..

<Embodiment 1>
A generator 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 2A, the direction indicated by the arrow A1 is referred to as a left-right direction, the direction indicated by the arrow A2 is referred to as a vertical direction, and the direction indicated by the arrow A3 in FIG. 2B is referred to as a front-back direction.

The generator 1 is rotatably supported by a holder 2 having a storage space 21, a rotating shaft 3 whose at least one end is exposed to the outside of the holder 2, and a storage space 21 of the holder 2. A rotating magnet 4 arranged and fixed to the rotating shaft 3, a non-magnetic tubular member 7 provided close to the rotating magnet 4 and held in the holder 2, and arranged on the outer periphery of the tubular member 7. The coil 8 is provided with a spherical magnet 6 which is arranged in the tubular member 7 and rotates by receiving a magnetic force from the rotating magnet 4.

The holder 2 has a storage space 21 for accommodating the rotating magnet 4 and a through hole 22 for inserting the rotating shaft 3 in the vertical direction. In the present embodiment, the groove 23 for accommodating the tubular member 7 is further provided on the left and right sides of the storage space 21.

The holder 2 is made of a non-magnetic material. Examples of the non-magnetic material include metals such as aluminum and synthetic resins such as plastics. In the present embodiment, the holder 2 is preferably formed of a synthetic resin.

The rotating shaft 3 is rotatably supported by the through hole 22 of the holder 2. The rotation axis 3 is provided so as to be rotatable about the rotation axis O along the extending direction thereof. The rotation shaft 3 extends through the through hole 22 of the holder 2 and the entire inside of the storage space 21. The rotating shaft 3 has a pinion 31 attached to one end portion exposed from the holder 2.

Of the rotating shaft 3 inserted inside the holder 2, the rotating magnet 4 is fixed to the portion located in the storage space 21. The rotating magnet 4 is fixed to the rotating shaft 3 by a method such as adhesion or pressure fitting, and rotates together with the rotating shaft 3 about the rotating axis O. In the present embodiment, the rotating magnet 4 is a cylindrical magnet.

The magnet used as the rotating magnet 4 is a permanent magnet. The rotating magnet 4 of the present embodiment is magnetized to two poles in the circumferential direction, but the number of poles of the rotating magnet 4 is not particularly limited as long as it has two or more poles. The "circumferential direction" is a circumferential direction extending along the outer circumference of the rotating magnet 4. The rotating magnet 4 of the present embodiment is a cylindrical magnet having a ring shape in a plan view, but the shape or number thereof is not limited. For example, two or more permanent magnets may be fixed to the rotating shaft 3 so that the polarities in the circumferential direction change alternately. Since the rotating magnet 4 may be magnetized on at least the outer peripheral surface thereof, it may be magnetized on one side or on both sides. The material of the rotating magnet 4 is not particularly limited, but it is preferable to use an Nd-Fe-B sintered magnet (neodymium magnet) from the viewpoint of exhibiting a high magnetic force.

The washer 32 is arranged so as to face both upper and lower end surfaces of the rotating magnet 4. The washer 32 is a ring-shaped plate material, and a rotating shaft 3 is inserted through a central portion thereof. That is, the washer 32 is rotatably arranged about the rotation axis O. The washer 32 is a flat washer made of a non-magnetic material such as stainless steel. This makes it possible to prevent or suppress wear of the holder 2 and the rotating magnet 4 due to the rotation of the rotating shaft 3.

The configuration including the tubular member 7, the coil 8, and the spherical magnet 6 generates an electric current by electromagnetic induction. Therefore, these configurations can be collectively regarded as the "current generating unit 5". The current generation unit 5 includes a first current generation unit 51 provided at a rotationally symmetric position about the rotation axis 3 and a second current generation unit 52. The first current generating portion 51 is arranged in the first cylindrical member 71, the first coil 81 arranged on the outer periphery of the first tubular member 71, and the tubular member 71 of the first current generating portion 51. Includes a first spherical magnet 61. The second current generating portion 52 is arranged in the second tubular member 72, the second coil 82 arranged on the outer periphery of the second tubular member 72, and the tubular member 72 of the second current generating portion 52. Includes a second spherical magnet 62. That is, the first and second current generating units 51 and 52 have the same configuration. In the following description, when it is not necessary to distinguish between the first current generation unit 51 and the second current generation unit 52, these are referred to as "current generation unit 5". Similarly, the first spherical magnet 61 and the second spherical magnet 62 are expressed as "spherical magnet 6", and the first tubular member 71 and the second tubular member 72 are expressed as "cylindrical member 7". The coil 81 and the second coil 82 are referred to as "coil 8".

The cylindrical member 7 has a hollow rod shape inside, and both ends thereof are fixed so as to fit into the holder 2. As shown in FIG. 2B, the tubular member 7 of the present embodiment extends in the front-rear direction (direction of arrow A3). The tubular member 7 of the present embodiment is formed of a cylindrical member from the viewpoint of facilitating the rotation of the spherical magnet 6, and its outer shape and inner shape are cylindrical in cross-sectional view. The cylindrical member 7 may have a shape in which the spherical magnet 6 can rotate on its axis, and the outer shape is not particularly limited.

The tubular member 7 is made of a non-magnetic material. In the present embodiment, it is made of a synthetic resin such as plastic from the viewpoint of easy formation and reduction of frictional resistance generated when the spherical magnet 6 is rotated.

A coil 8 is wound around the outer circumference of the tubular member 7. Therefore, the tubular member 7 also plays the role of a bobbin of the coil 8. Although the coil 8 of the present embodiment is provided on a part of the outer periphery of the tubular member 7, it may be provided on the entire circumference of the tubular member 7. The coil 8 is, for example, a solenoid coil.

Inside the first and second cylindrical members 71 and 72, first and second spherical magnets 61 and 62 are provided. The first and _second spherical magnets 61 and 62 receive a magnetic force from the rotating magnet ₄ and rotate around the rotation axes P1 and P2. The first and second spherical magnets 61 and 62 are magnetized to _two poles with a plane including the rotation axes P1 and P2 as _a boundary. That is, the first and second spherical magnets 61 and 62 are permanent magnets in which the N pole and the S pole are polarized and magnetized by hemispheres.

The first and second spherical magnets 61 and 62 of the present embodiment are each composed of one spherical magnet. As a result, the first and second spherical magnets 61 and 62 make point contact with the support surface, so that the frictional resistance becomes small, and the first and second spherical magnets 61 and 62 rotate on their axis only by the magnetic force from the rotating magnet 4 rotating around the rotating shaft 3. can.

As shown in FIG. 2B, the first and second tubular members 71 and 72 extend in the front-rear direction, and the first and second tubular members 71 and 72 and the first and second coils 81, The center position of 82 in the front-rear direction is substantially the same as that of the rotating magnet 4. The first and second spherical magnets 61 and 62 arranged inside the first and second tubular members 71 and 72 are attracted by the attractive force from the rotating magnet 4, and are before and after the first and second coils 81 and 82. It is maintained to be placed inside the directional center position. As a result, the generator 1 can efficiently generate an induced current. Further, the outer diameters of the first and second spherical magnets 61 and 62 are slightly smaller than the inner diameters (hollow diameters) of the first and second tubular members 71 and 72. The first and _second spherical magnets 61 and 62 rotate around the rotation axes P1 and P2 to generate an electric current in the _first and second coils 81 and 82. That is, the lines of magnetic force generated from the first and second spherical magnets 61 and 62 intersect (orthogonally) with the first and second coils 81 and 82, so that an alternating current is generated in the first and second coils 81 and 82. ..

One end of the coil 8 of the current generating unit 5 is connected to a rectifying unit (not shown), and the current rectified by the rectifying unit (not shown) is transmitted to an external member (not shown). As a result, the external member can be activated by the current generated by the current generating unit 5. The alternating current generated in the coil 8 may be transmitted to the external member without being rectified.

(About operation)
Subsequently, the operation of the generator 1 of the present embodiment will be described with reference to FIGS. 2 (a) and 2 (b).

First, the rotation shaft 3 rotates by transmitting the motion of a drive member (not shown) such as a rack or a gear to the pinion 31. The drive member is, for example, a member such as a rotating shaft of a door. Along with the rotation of the rotating shaft 3, the rotating magnet 4 fixed to the rotating shaft 3 rotates around the rotating axis O. Since the cylindrical member 7 and the coil 8 of the current generating portion 5 are fixed to the holder 2, they do not rotate with the rotation of the rotating shaft 3. Therefore, among the current generating portions 5, only the spherical magnet ₆ rotates on the rotation axes P1 and P2 due to the magnetic force of the rotating magnet ₄ received on the spot. Since the magnetic force of the rotating magnet 4 and the magnetic force from the spherical magnet 6 act on the coil 8, electromagnetic induction occurs and an electromotive force (induced current) is generated. This electromotive force is transmitted to the rectifier circuit (not shown) via the wiring (not shown) connected to the coil 8.

In the generator 1 of the present embodiment, when the rotating shaft 3 and the rotating magnet 4 rotate counterclockwise, the first spherical magnet 61 and the second spherical magnet 62, which receive the magnetic force from the rotating magnet 4, rotate respectively. It rotates clockwise around the axes _P1 and _P2 . Here, the vibration dynamo device of Patent Document 1 generates electricity by sliding the spherical magnet inside the tubular member. Therefore, members for repelling the spherical magnet are required at both ends of the tubular member. On the other hand, in the present invention, the relative positional relationship between the rotating magnet 4, the first spherical magnet 61, and the second spherical magnet 62 does not change even during motion (during power generation), and the spherical member is repelled. No member is required. Therefore, the size of the generator 1 can be reduced.

Further, in the generator 1 of the present embodiment, since the rotating magnet 4 and the spherical magnet 6 are always in close proximity to each other, the leakage flux can be reduced. That is, because the generator 1 can effectively utilize the magnetic force generated from both the rotating magnet 4 and the spherical magnet 6, it is possible to secure a sufficient amount of power generation even with a small movement. In other words, the generator 1 of the present embodiment is a generator having a feature of high power generation efficiency with respect to movement.

(Regarding the positional relationship between the rotating magnet and the current generator)
As shown in FIG. 2B, in the current generation unit 5 of the present embodiment, the outer peripheral surface 83 of the coil 8 wound around the tubular member 7 is close to the rotating shaft 3, and the tubular member 7 has a peripheral surface 83. The central axes R ₁ and R ₂ are positioned so as to extend in a direction perpendicular to the rotation axis 3 at a position where they do not intersect the rotation axis 3.

As shown in FIG. 2A, the rotation axes P1 and P2 of the spherical magnet ₆ of the present embodiment are parallel to the rotation axis ₃ . As a result, the generator 1 itself can be made into a compact structure.

Further, the rotation axes P1 and P2 of the spherical magnet ₆ intersect the circumferential orbital plane 83 of the coil ₈ . As a result, the rotation direction of the spherical magnet 6 during the rotation motion and the winding direction of the coil 8 do not become the same direction, so that electromagnetic induction can be efficiently generated.

(effect)
As described above, according to the present embodiment, when the rotating shaft 3, the rotating magnet 4, and the spherical magnet 6 are regarded as "rotating bodies", the holder 2, the tubular member 7, and the coil are used. 8 can be regarded as a "fixed body". That is, the spherical magnet 6 can be lightly rotated by the magnetic force of the rotating rotating magnet 4 without rotating, rocking, or vibrating the tubular member 7 itself.

As a result, according to the present embodiment, it is possible to efficiently generate an electric current while having a low torque. That is, the power generation efficiency of the current generating unit 5 can be improved. Further, unlike Patent Document 1, the spherical magnet does not need to vibrate inside the tubular member, and the member for vibrating the spherical magnet is not required, so that the generator 1 can be made into a simple and compact structure. ..

When the generator 1 of the present embodiment is designed so that, for example, the rotating body can generate enough power for the operation of the wireless remote control only by rotating 180 °, the pinion 31 and the input unit of the wireless remote control are used. If they are connected and the outer periphery of the rotating magnet 4 is magnetized with two poles, the rotating magnet 4 and the spherical magnet 6 are attracted to each other, repelled, and attracted while the rotating body rotates by 180 °. That is, by pressing the input unit of the wireless remote controller once, it is possible to obtain a moderate click feeling due to the attraction / repulsion operation between the magnets. The "click feeling" is the sound or response felt when the switch is pressed. That is, the generator 1 of the present embodiment can be suitably used as a generator for small equipment such as a wireless remote controller.

<Embodiment 2>
The generator 1A of the second embodiment of the present invention will be described with reference to FIGS. 3 and 4. 3A and 3B are perspective views of the generator 1A according to the present embodiment, FIG. 4 is a sectional view of the generator 1A according to the present embodiment, FIG. 3A is a vertical sectional view, and FIG. 4B is a vertical sectional view. 4 is a cross-sectional view taken along the line IVb-IVb in FIG. 4A. The generator 1A of the second embodiment basically has the same configuration as the generator 1 of the first embodiment, but as shown in FIG. 3, mainly the current generating unit 5A with respect to the rotating shaft 3 Different about relative positional relationship.

As shown in FIGS. 3 and 4, the generator 1A in the present embodiment includes a first current generation unit 51A and a second current generation unit 52A provided at rotationally symmetric positions about the rotation axis 3. .. In the first and second current generating portions 51A and 52A, one end surface of the first and second tubular members 71A and 72A is close to the rotating magnet 4, and the center of the first and second tubular members 71A and 72A. The axes S ₁ and S ₂ are orthogonal to the axis of rotation 3. As a result, the generator 1A can be miniaturized.

The tubular member 7A is fixed to the holder 2A so that one end face is close to the rotating magnet 4, and the other end face is open. The spherical magnet 6A of the present embodiment is supported so as to be attracted in the rotation axis O direction by the magnetic force of the rotating magnet 4, and rotates on the spot due to the rotation of the rotating magnet 4, so that it does not necessarily cover the other end face. No need. However, from the viewpoint of preventing the spherical magnet 6A from falling off, a cap member (not shown) may be provided on the other end surface.

When the tubular member 7A is fixed as described above, the spherical magnet 6A arranged inside the tubular member 7A is attracted to one end surface of the tubular member 7A due to the magnetic force of the rotating magnet 4. In order to prevent this, in the present embodiment, a spacer 9 made of a non-magnetic material for locating the spherical magnet 6A at the center of the tubular member 7A is arranged in the tubular member 7A. The spacer 9 may be any as long as it can support the spherical magnet 6A so as to be located at the center of the coil 8A, and its shape is not particularly limited. As a result, the coil 8A can generate electromagnetic induction by the magnetic force from the spherical magnet 6A at the center position in the left-right direction, and has a larger electromotive force than the electromagnetic induction at the position of the end portion in the left-right direction of the coil 8A. can do. That is, the generator 1A provided with the spacer 9 can efficiently generate power. The spacer 9 is preferably formed of a hard and smooth material, for example, of a resin, from the viewpoint of reducing the contact resistance with the spherical magnet 6A.

(About operation)
In the generator 1A of the present embodiment, when the rotating shaft 3 and the rotating magnet 4 rotate counterclockwise, the first spherical magnet 61A receives the magnetic force from the rotating magnet 4 and the first spherical magnet 61A rotates clockwise around the rotating axis _Q1 . The second spherical magnet 62A rotates clockwise around the rotation axis _Q2 . That is, in the generator 1A of the present embodiment, the rotating magnet 4, the first spherical magnet 61A, and the second spherical magnet 62A each rotate on the spot, and the first and second current generating portions 51A, Power is generated by generating an induced current at 52A. Further, unlike the vibration dynamo device of Patent Document 1, the generator 1A does not require the spherical magnet arranged inside the tubular member to vibrate, and does not require a member for vibration. That is, the relative positional relationship between the rotating magnet 4 of the generator 1A, the first spherical magnet 61A, and the second spherical magnet 62A does not change even during motion (during power generation). Therefore, the size of the generator 1A can be reduced.

(Regarding the positional relationship between the rotating magnet and the current generator)
The rotation axes _Q1 and Q2 of the first and _second spherical magnets 61A and 62A of the present embodiment are parallel to the rotation axis O of the rotation axis 3. As a result, the generator 1A itself can have a compact structure. Further, the rotation axes _Q1 and _Q2 of the first and second spherical magnets 61A and 62A intersect the circumferential orbital plane 83A of the first and second coils 81A and 82A. As a result, the rotation direction of the spherical magnet 6A during the rotation motion and the winding direction of the coil 8 do not become the same direction, so that electromagnetic induction can be efficiently generated.

Although the first current generating units 51, 51A and the second current generating units 52, 52A of the first and second embodiments are configured to be provided at two rotationally symmetric positions about the rotation axis 3. If a sufficient amount of power generation can be secured to operate the external member, only one current generating unit 5, 5A may be provided.

<Embodiment 3>
The generator 100 of another embodiment of the present invention will be described with reference to FIGS. 5 and 6.

The generator 100 is rotatably supported by a holder 102 having a storage space 121, a rotating shaft 103 whose at least one end is exposed to the outside of the holder 102, and a storage space 121 of the holder 102. A non-magnetic material that is arranged and fixed to a rotating shaft 103, and a non-magnetic material that is arranged so that one end is close to the rotating magnet 104 and the other end is away from the rotating magnet 104, and is held by the holder 102. A magnetic core of a soft magnetic material that is arranged inside a tubular member 107, a coil 108 arranged on the outer periphery of the tubular member 107, and repeatedly reverses the direction of magnetism by receiving a magnetic force from a rotating magnet 104. It is equipped with 106.

The holder 102 has a storage space 121 for accommodating the rotating magnet 104 and a through hole 122 for inserting the rotating shaft 103 in the vertical direction. In the present embodiment, the groove portions 123 for accommodating the tubular member 107 are further provided on the left and right sides of the storage space 121.

The holder 102 is made of a non-magnetic material. Examples of the non-magnetic material include metals such as aluminum and synthetic resins such as plastics. In this embodiment, the holder 102 is preferably made of a synthetic resin.

The rotating shaft 103 is rotatably supported by the through hole 122 of the holder 102. The rotation axis 103 is provided so as to be rotatable about the rotation axis O along the extending direction thereof. The rotation shaft 103 extends through the through hole 122 of the holder 102 and the entire storage space 121. The rotating shaft 103 has a pinion 131 at one end portion exposed from the holder 102.

Of the rotating shaft 103 inserted inside the holder 102, the rotating magnet 104 is fixed to the portion located in the storage space 121. The rotating magnet 104 is fixed to the rotating shaft 103 by a method such as adhesion or pressure fitting, and rotates together with the rotating shaft 103 about the rotating axis O. In the present embodiment, the rotating magnet 104 is a cylindrical magnet.

The magnet used as the rotating magnet 104 is a permanent magnet. The rotating magnet 104 of the present embodiment is magnetized to two poles in the circumferential direction, but the number of poles of the rotating magnet 104 is not particularly limited as long as it has two or more poles. The "circumferential direction" is a circumferential direction extending along the outer circumference of the rotating magnet 104. The rotating magnet 104 of the present embodiment is a cylindrical magnet having a ring shape in a plan view, but the shape or number thereof is not limited. For example, two or more permanent magnets may be fixed to the rotating shaft 103 so that the polarities in the circumferential direction change alternately. Since the rotating magnet 104 may be magnetized on at least the outer peripheral surface thereof, it may be magnetized on one side or on both sides. The material of the rotating magnet 104 is not particularly limited, but it is preferable to use an Nd-Fe-B sintered magnet (neodymium magnet) from the viewpoint of exhibiting a high magnetic force.

The washer 132 is arranged so as to face both ends of the rotating magnet 104 in the vertical direction. The washer 132 is a ring-shaped plate material, and a rotating shaft 103 is inserted through the central portion thereof. That is, the washer 132 is rotatably arranged about the rotation axis O. The washer 132 is a flat washer made of, for example, stainless steel. This makes it possible to prevent or suppress wear of the holder 102 and the rotating magnet 104 due to the rotation of the rotating shaft 103.

The configuration including the tubular member 107, the coil 108, and the magnetic core 106 generates an electric current by electromagnetic induction. Therefore, these configurations can be collectively regarded as the "current generating unit 105". The current generation unit 105 includes a first current generation unit 151 provided at a rotationally symmetric position about the rotation axis 103, and a second current generation unit 152. The first current generation unit 151 was arranged in the first cylindrical member 171 and the first coil 181 arranged on the outer periphery of the first tubular member 171 and the tubular member 171 of the first current generation unit 151. Includes the first magnetic core 161. The second current generating portion 152 was arranged in the second cylindrical member 172, the second coil 182 arranged on the outer periphery of the second tubular member 172, and the tubular member 172 of the second current generating portion 152. Includes a second magnetic core 162. That is, the first and second current generating units 151 and 152 have the same configuration. In the following description, when it is not necessary to distinguish between the first current generation unit 151 and the second current generation unit 152, these are referred to as "current generation unit 105". Similarly, the first magnetic core 161 and the second magnetic core 162 are expressed as "magnetic core 106", the first tubular member 171 and the second tubular member 172 are expressed as "cylindrical member 107", and the first coil 181 and The second coil 182 is expressed as "coil 108".

The tubular member 107 has, for example, a cylindrical shape and a hollow rod shape inside, and at least one end portion or the other end portion is fixed to the holder 102. The tubular member 107 is made of a non-magnetic material. In the present embodiment, it is made of a synthetic resin such as plastic from the viewpoint of easy formation. As shown in FIG. 6, the tubular member 107 of the present embodiment extends in the left-right direction (direction of arrow A1).

A coil 108 is wound around the outer circumference of the tubular member 107. Therefore, the tubular member 107 also plays the role of a bobbin of the coil 108. Although the coil 108 of the present embodiment is provided on a part of the outer periphery of the tubular member 107, it may be provided on the entire circumference of the tubular member 107. The coil 108 is, for example, a solenoid coil.

The magnetic core 106 is a long rod-shaped member housed inside the tubular member 107. The long rod-shaped member may be long as a whole, may be composed of one member, or may be composed of a plurality of members continuously connected. good. From the viewpoint of increasing the electromotive force, the magnetic core 106 is preferably housed inside the tubular member 107 from one end to the other.

The magnetic core 106 is made of a soft magnetic material from the viewpoint of easy switching of magnetism, and changes to a magnetic material by bringing a magnet close to at least one end or the other end. The magnetic core 106 may be a soft magnetic material, for example, an iron material, a SUS (stainless steel) material, a SKH (high speed steel) material, a ferrite material, or the like. As a result, for example, if the pinion 131 is designed to generate electricity by pressing a switch on the wireless remote controller, the pinion 131 can generate electricity instantly and transmit wirelessly by simply pressing the switch, thus reducing the time lag. ..

The magnetic core 106 of the present embodiment is arranged at a position where one end thereof faces the outer peripheral surface of the rotating magnet 104 with the holder 102 interposed therebetween. As a result, the magnetic core 106 is magnetized by receiving the magnetic force of the rotating magnet 104. The magnetic core 106 receives a magnetic force from the rotating magnet 104 and repeatedly reverses the direction of magnetism to generate an electric current in the coil 108. That is, the lines of magnetic force generated from the magnetic core 106 intersect (orthogonally) with the coil 108, so that an alternating current is generated in the coil 108.

As shown by the alternate long and short dash line in FIG. 5, the generator 100 further comprises a soft magnetic material yoke 109 that abuts on at least one end or the other end of the magnetic core 106 and is held in the holder 102. As a result, the leakage flux can be further reduced and the induced electromotive force can be increased, so that the amount of power generated by the generator 100 can be increased. The yoke is soft iron that amplifies the attractive force of the magnet, and may contain iron, and includes a soft magnetic material. From the viewpoint of further increasing the amount of power generation, the yoke 109 is preferably in contact with at least one end or the other end of the magnetic core 106.

The yoke 109 in the present embodiment is held on the outer peripheral surface of the holder 102 with the rotation shaft 103 as the center, and the current generating portion 105 cannot be seen from the outside. As a result, it is possible to prevent a problem from occurring due to foreign matter being mixed into the current generating unit 105. Further, if the other end of the magnetic core 106 is in contact with the yoke 109, the magnetism of the yoke 109 and the magnetic core 106 can be switched integrally, so that the induced electromotive force can be increased.

The outer diameter of the magnetic core 106 of the present embodiment and the inner diameter of the tubular member 107 (the diameter of the hollow shape) are substantially the same. Since the magnetic core 106 arranged inside the tubular member 107 is attracted by the attractive force from the rotating magnet 104, it is preferable that a part of the holder 102 is arranged between the magnetic core 106 and the rotating magnet 104. As a result, since the magnetic core 106 is held in the tubular member 107, it is possible to prevent the magnetic core 106 from sticking to the rotating magnet 104.

One end of the coil 108 of the current generating unit 105 is connected to a rectifying unit (not shown), and the current rectified by the rectifying unit (not shown) is transmitted to an external member (not shown). As a result, the external member can be activated by the current generated by the current generating unit 105. The alternating current generated in the coil 108 may be transmitted to the external member without being rectified.

Further, in the generator 100 of the present embodiment, since the rotating magnet 104 and the magnetic core 106 are always in close proximity to each other, the leakage flux can be reduced. Since the generator 100 can effectively utilize the magnetic force generated from both the rotating magnet 104 and the magnetic core 106, it is possible to secure a sufficient amount of power generation even with a small amount of movement. In other words, the generator 100 of the present embodiment is a generator having a feature of high power generation efficiency with respect to movement.

As described above, according to the present embodiment, when the rotating shaft 103 and the rotating magnet 104 are regarded as "rotating bodies", the holder 102, the tubular member 107, the coil 108, and the magnetic core 106 Can be regarded as a "fixed body". That is, even if the cylindrical member 107 itself is not rotated, rocked, or vibrated, a current can be lightly generated from the magnetic core 106 by the magnetic force of the rotating rotating magnet 104.

As a result, according to the present embodiment, it is possible to efficiently generate an electric current while having a low torque. That is, the power generation efficiency of the current generating unit 105 can be improved. Further, unlike Patent Document 1, the spherical magnet does not need to vibrate inside the tubular member, and the member for vibrating the spherical magnet is not required, so that the generator 100 can be made into a simple and compact structure. ..

When the generator 100 of the present embodiment is designed so that, for example, the rotating body can generate enough power for the operation of the wireless remote controller only by rotating 180 °, the pinion 131 and the input unit of the wireless remote controller are used. If they are connected and the outer circumference of the rotating magnet 104 is magnetized by two poles, the direction of magnetism in the magnetic core 106 is reversed once while the rotating body rotates by 180 °. That is, by pressing the input unit of the wireless remote controller once, it is possible to obtain a moderate click feeling by reversing the magnetism of the magnetic core 106 of the soft magnetic material. The "click feeling" is the sound or response felt when the switch is pressed. That is, the generator 100 of the present embodiment can be suitably used as a generator for small equipment such as a wireless remote controller.

The generator 100 of the present embodiment adopts an inexpensive electromagnetic induction method as a generator. Further, by using the magnetic core 106, which is a soft magnetic material, as the material that causes electromagnetic induction, the cost can be further reduced.

<Embodiment 4>
The generator 100A according to the fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a perspective view of the generator 100A according to the present embodiment, and FIG. 8 is a cross-sectional view of the generator 100A according to the present embodiment. The generator 100A of the fourth embodiment basically has the same configuration as the generator 100 of the third embodiment, but as shown in FIG. 7, the arrangement configuration of the yoke 109A and the current generating unit 105A. Different about. In FIG. 8, the direction indicated by the arrow A2 is referred to as a vertical direction.

As shown in FIG. 7, the generator 100A in the present embodiment is provided with a first current generating unit 151A and a second current generating unit 152A at rotationally symmetric positions about the rotation shaft 103. The generator 100A includes a yoke 109A that abuts on one end or the other end of the first current generating section 151A and the second current generating section 152A and is held by the holder 102A.

The yoke 109A is held by the holder 102A so as to cover the outer peripheral surface of the holder 102A with the rotation shaft 103 as the center. In the generator 100A of the present embodiment, unlike the generator 100, the outer peripheral surface of the coil 108A is not covered with the yoke 109A.

The generator 100A of the present embodiment receives the magnetic force from the rotating magnet 104A when the rotating shaft 103 and the rotating magnet 104A rotate, and repeats the reversal of the magnetic direction of the magnetic core 106A. That is, the generator 100A in the present embodiment generates electricity by generating electromagnetic induction in the current generating unit 105A only by switching the direction of the magnetism of the magnetic core 106A. Further, unlike the vibration dynamo device of Patent Document 1, the generator 100A does not require the spherical magnet arranged inside the tubular member to vibrate, and does not require a member for vibration. That is, the relative positional relationship between the rotating magnet 104A of the generator 100A and the magnetic core 106A does not change even during motion (during power generation). Therefore, the size of the generator 100A can be reduced.

<Embodiment 5>
The generator 100B according to the fifth embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. 9 is a perspective view of the generator 100B according to the present embodiment, and FIG. 10 is a cross-sectional view of the generator 100B according to the present embodiment. The generator 100B of the fifth embodiment basically has the same configuration as the generator 100 of the third embodiment, but as shown in FIG. 9, the arrangement configuration of the current generating unit 105B is different.

As shown in FIGS. 9 and 10, the generator 100B in the present embodiment is rotatably supported by a holder 102B having a storage space 121B and a holder 102B, and at least one end thereof is exposed to the outside of the holder 102B. It has a rotating shaft 103, a rotating magnet 104B arranged in the storage space 121B of the holder 102B and fixed to the rotating shaft 103, one end and the other end, and its outer peripheral surface is close to the rotating magnet 104B. A non-magnetic tubular member 107B arranged in such a manner and held in the holder 102B, a coil 108B arranged on the outer periphery of the tubular member 107B, and a magnetic force from the rotating magnet 104B arranged in the tubular member 107B. It is provided with a magnetic core 106B of a soft magnetic material that repeatedly reverses the direction of magnetism in response to the above, and a yoke 109B of a soft magnetic material that abuts on one end and the other end of the magnetic core 106B and is held by the holder 102B.

Unlike the generators 100 and 100A of the third and fourth embodiments, the generator 100B of the fifth embodiment does not have the end of the magnetic core 106B facing the outer peripheral surface of the rotating magnet 104B. That is, at least a part of the outer peripheral surface 183B of the coil 108B wound around the tubular member 107B is close to the rotation shaft 103. Further, the central axis of the tubular member 107B of the present embodiment extends in a direction perpendicular to the rotation axis 103 at a position not intersecting the rotation axis 103. Due to such a configuration, it is difficult for the generator 100B to bring the magnetic core 106B and the rotating magnet 104B sufficiently close to each other, and the rotating magnet 104B can hardly contribute to the induced electromotive force generated by the magnetic core 106B.

However, the generator 100B has a configuration in which the yoke 109B and the rotating magnet 104B are close to each other. The yoke 109B is magnetized by receiving a magnetic force from the rotating magnet 104B, and magnetizes the magnetic core 106B that abuts on the yoke 109B. That is, in the generator 100B, since the rotating magnet 104B and the yoke 109B are in close proximity to each other and the yoke 109B and the magnetic core 106B are in contact with each other, the magnetism of the yoke 109B is switched according to the rotation of the rotating magnet 104B, and the magnetic core 106B is switched. Power is generated by reversing the polarity of.

The configuration including the tubular member 107B, the coil 108B, the magnetic core 106B, and the yoke 109B generates a current by electromagnetic induction. Therefore, these configurations can be collectively regarded as the "current generating unit 105B". The current generation unit 105B includes a first current generation unit 151B provided at a rotationally symmetric position about the rotation axis 103, and a second current generation unit 152B. That is, since the current generating unit 105B of the generator 100B is larger than the current generating units 105 and 105A of the generators 100 and 100A, the induced electromotive force generated when the direction of magnetism is reversed is also large, so that the amount of power generation is large. can do.

The yoke 109B is provided at least on the upper surface and the lower surface of the holder 102B. The yoke 109B may be arranged so as to be able to receive the magnetic force of the rotating magnet 104B and to magnetize the magnetic core 106B. Specifically, the yoke 109B is provided so as to cover the upper surface (lower surface) of the holder 102B at a position close to the rotating magnet 104B and a position in contact with one end (the other end) of the magnetic core 106B. In other words, the pair of yokes 109B are provided so as to sandwich the magnetic core 106B and the rotating magnet 104B from above and below. The yoke 109B may be, for example, one plate-shaped member or a plurality of plate-shaped members. As a result, the magnetic force of the rotating magnet 104B can be transmitted to the magnetic core 106B.

In the present embodiment, a case where the central axis of the tubular member 107B extends in a direction perpendicular to the rotation axis 103 at a position not intersecting the rotation axis 103 has been described. However, if the yoke 109B is arranged so that it can receive the magnetic force of the rotating magnet 104B and can magnetize the magnetic core 106B, the central axis of the tubular member 107B is in the direction horizontal to the rotating axis 103. It may be extended.

It should be noted that the current generating units 105, 105A, and 105B of the third to fifth embodiments are configured to be provided at two rotationally symmetric positions about the rotation axis 103, but the number is not limited. For example, if a sufficient amount of power generation can be secured to operate the external member, only one current generating unit 105, 105A, 105B may be provided.

Further, even if only one current generating unit 105, 105A, 105B is provided, the yokes 109, 109A, 109B have the other end portions of the magnetic cores 106, 106A, 106B according to the form of each generator (the other end portions of the magnetic cores 106, 106A, 106B). It is held in the holders 102, 102A, 102B so as to be in contact with the holder 102, 102A, 102B.

Further, although an example in which the yokes 109 and 109A are provided for the generators 100 and 100A of the third and fourth embodiments has been described, the generators 100 and 100A according to these embodiments do not have the yokes 109 and 109A. It has sufficient electromotive force. That is, the generators 100 and 100A do not have to include the yokes 109 and 109A.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to that of the illustrated embodiment. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

1 Generator, 2 Holder, 3 Rotating shaft, 4 Rotating magnet, 5 Current generating part, 6 Spherical magnet, 7 Cylindrical member, 8 Coil, 9 Spacer, 51 1st current generating part, 52 2nd current generating part, 61 1st spherical magnet, 62 2nd spherical magnet, 71 1st tubular member, 72 2nd tubular member, 81 1st coil, 82 2nd coil, 100 generator, 102 holder, 103 rotating shaft, 104 rotating magnet, 105 current generator, 106 magnetic core, 107 tubular member, 108 coil, 109 yoke, 151 first current generator, 152 second current generator, 161 first magnetic core, 162 second magnetic core, 171 first tubular member, 172 second tubular member, 181 first coil, 182 second coil.

Claims (18)

1. A holder with a storage space and
   A rotating shaft rotatably supported by the holder,
   A rotating magnet arranged in the storage space of the holder and fixed to the rotating shaft,
   A non-magnetic tubular member held in the holder,
   The coil arranged on the outer circumference of the tubular member and
   A generator which is arranged in the tubular member and includes a magnetic material which receives a magnetic force from the rotating magnet and changes the direction of a magnetic field which affects the coil.
2. The cylindrical member is provided in close proximity to the rotating magnet and is provided.
   The generator according to claim 1, wherein the magnetic material is a spherical magnet that rotates on its axis in response to a magnetic force from the rotating magnet.
3. The generator according to claim 2, wherein the rotation axis of the spherical magnet is parallel to the rotation axis.
4. The generator according to claim 2, wherein the rotation axis of the spherical magnet intersects the circumferential orbital plane of the coil.
5. The generator according to any one of claims 1 to 4, wherein the rotating magnet is a cylindrical magnet.
6. One end face of the tubular member is in close proximity to the rotating magnet.
   The generator according to any one of claims 1 to 5, wherein the central axis of the tubular member is orthogonal to the rotation axis.
7. The generator according to claim 6, wherein a spacer made of a non-magnetic material for locating the spherical magnet at the center of the tubular member is arranged in the tubular member.
8. The outer peripheral surface of the coil wound around the tubular member is close to the rotation axis, and the central axis of the tubular member is in a direction perpendicular to the rotation axis at a position not intersecting the rotation axis. The generator according to any one of claims 1 to 5, which is extended.
9. The current generating portion including the cylindrical member, the coil, and the spherical magnet is
   It includes a first current generating unit and a second current generating unit provided at rotationally symmetric positions about the rotation axis.
   The spherical magnet includes a first spherical magnet arranged in the tubular member of the first current generating portion and a second spherical magnet arranged in the tubular member of the second current generating portion. The generator according to any one of Items 1 to 8.
10. The cylindrical rotating magnet is magnetized in two poles in the circumferential direction.
    The generator according to claim 5, wherein the spherical magnet is magnetized to two poles with a plane including the rotation axis of the spherical magnet as a boundary.
11. The tubular member is arranged so that one end is close to the rotating magnet and the other end is away from the rotating magnet.
    The generator according to claim 1, wherein the magnetic material is a magnetic core of a soft magnetic material that repeatedly reverses the direction of magnetism by receiving a magnetic force from the rotating magnet.
12. The generator according to claim 11, further comprising a yoke of a soft magnetic material that abuts on at least one end or the other end of the magnetic core and is held in the holder.
13. The current generating portion including the cylindrical member, the coil, and the magnetic core
    The generator according to claim 11 or 12, which includes a first current generating unit and a second current generating unit provided at rotationally symmetric positions about the rotation axis.
14. The cylindrical member has one end and the other end, and the outer peripheral surface thereof is arranged so as to be close to the rotating magnet.
    The magnetic material is a magnetic core of a soft magnetic material that repeatedly reverses the direction of magnetism by receiving a magnetic force from the rotating magnet.
    The generator according to claim 1, wherein the generator further comprises a yoke of a soft magnetic material that abuts on one end and the other end of the magnetic core and is held in the holder.
15. The outer peripheral surface of the coil wound around the tubular member is close to the rotation axis, and the central axis of the tubular member is in a direction perpendicular to the rotation axis at a position not intersecting the rotation axis. The generator according to claim 14, which is extended.
16. The current generating portion including the cylindrical member, the coil, the magnetic core, and the yoke is
    The generator according to claim 14 or 15, which includes a first current generating unit and a second current generating unit provided at rotationally symmetric positions about the rotation axis.
17. The generator according to any one of claims 11 to 16, wherein the rotating magnet is a cylindrical magnet and is magnetized in two poles in the circumferential direction.
18. At least one end of the rotating shaft is exposed to the outside of the holder.
    The generator according to any one of claims 1 to 17, which has a pinion at one end exposed from the holder.
    

Images