JPH09163771A - Method and apparatus for power generation and portable power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable power generator which can generate electricity stably, efficiently and at low costs. SOLUTION: A magnetostrictive element 10 which is fixed to a space 3 in a heel part 2 at footware 1 is deformed by a walking operation or when a pressure is applied by the walking operation. A magnetic field inside a coil 11 is changed by its deformation. An induced electromotive force is generated in the coil 11. The generated induced electromotive force is full-wave-rectified by a diode bridge 12 so as to be stored in a storage battery 13. Alternatively, a weight is fixed to the other end of a magnetostrictive element 10 which is fixed to one end inside a space in a heel part, and the magnetostrictive element 10 is deformed by a walking operation or while a vibration by the walking operation is applied to the weight. Alternatively, a weight is fixed to the other end of a magnetostrictive element 10 one end of which is fixed to a pedometer, and the magnetostrictive element 10 is deformed by a walking operation or while a vibration is applied to the weight by the walking operation. Alternatively, a permanent magnet is fixed to one end inside a space in a heel part, a coil is fixed to the other end, the coil is wound on the permanent magnet, and an induced electromotive force is generated in the coil by a walking operation due to a change in the relative position of the permanent magnet to the coil by the walking operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generator,
In particular, the present invention relates to a portable power generator suitable for supplying electric power to a portable device.

[0002]

2. Description of the Related Art Conventionally, as a portable power generator, one that generates an induced electromotive force by moving a coil or the like in a magnetic field due to rotation of a weight, or a piezoelectric element is used to apply a force to the piezoelectric element. In general, the electromotive force generated in the piezoelectric element due to the so-called piezo effect is used.

[0003]

However, in the method of generating the induced electromotive force by the rotation of the weight, for example,
In the case of generating power while walking, there is a problem in that the efficiency is not sufficient even if it is installed on a swinging part such as shoes.

In the method of generating electric power using a piezoelectric element, it is common to use a highly efficient ceramic piezoelectric element (eg lead zirconate titanate) as the piezoelectric element. However, there is a problem that the piezoelectric element is easily damaged, and the piezoelectric element is damaged when being carried so that power cannot be generated.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a portable power generator which is convenient to carry, stable, efficient, and inexpensive to generate power. To do.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 generates a magnetic field by deforming by receiving a force applied from the outside, and further deforms the magnetic field. A magnetic field changing process of changing the magnetic field by deforming the magnetostrictive element in which the magnetic field changes and an induced electromotive force generating process of generating induced electromotive force by the change of the magnetic field are configured.

According to the operation of the invention described in claim 1, in the magnetic field changing process, the magnetostrictive element is deformed to change the magnetic field. Then, in the induced electromotive force generation process, the induced electromotive force is generated by the change of the magnetic field.

Thus, since the magnetostrictive element is used, the magnetostrictive element is less likely to be damaged, so that stable power generation can be continuously performed. Further, by reducing the size of the magnetostrictive element, it is possible to generate electricity without increasing the size of the entire device.

In order to solve the above-mentioned problems, the invention according to claim 2 is a magnetic field in which a magnetic field is generated by being deformed by receiving a force applied from the outside, and the magnetic field is changed by further deformation. The distortion element and the induced electromotive force generating means for generating an induced electromotive force by the change of the magnetic field are provided.

According to the operation of the invention described in claim 2, the magnetostrictive element generates a magnetic field by being deformed by receiving a force applied from the outside, and the magnetic field is changed by further deforming.

Then, the induced electromotive force generating means generates an induced electromotive force by the change of the magnetic field. Therefore, since the magnetostrictive element is used, the magnetostrictive element is less likely to be damaged and continuous stable power generation can be performed.

Further, by reducing the size of the magnetostrictive element, it is possible to realize a power generating device that can generate power without increasing the size of the entire power generating device. In order to solve the above-mentioned problem, the invention according to claim 3 is fixed in the footwear sole, generates a magnetic field by being deformed by receiving a force applied from the outside, and further deforms the magnetic field. A magnetostrictive element that changes, an induced electromotive force generating unit that generates an induced electromotive force due to a change in the magnetic field caused by deformation of the magnetostrictive element, and a rectifying unit such as a diode bridge that rectifies the generated induced electromotive force. , And are configured.

According to the operation of the invention described in claim 3, the magnetostrictive element is fixed in the footwear sole and is deformed by receiving a force applied from the outside, and at the same time, generates a magnetic field.
Further deformation causes the magnetic field to change.

Then, the induced electromotive force generating means generates an induced electromotive force by the change of the magnetic field caused by the deformation of the magnetostrictive element. After that, the rectifying means rectifies the generated induced electromotive force.

Therefore, the magnetic field is changed by the deformation of the magnetostrictive element by the force applied to the magnetostrictive element by the walking or running of the user wearing the above-mentioned footwear, and the induced electromotive force generated by the change of the magnetic field is generated. Since it is rectified, it is possible to realize a simple portable power generator that can continuously generate power with a simple configuration.

Further, since the magnetostrictive element is used, damage is less likely to occur and stable power generation can be performed.
In order to solve the above-mentioned problems, the invention according to claim 4 is such that one end is fixed in the footwear sole, and a magnetic field is generated by being deformed by receiving a force applied from the outside, and further deformed. A magnetostrictive element in which the magnetic field changes, a weight that is housed movably in the footwear sole and fixed to the other end of the magnetostrictive element, and that deforms the magnetostrictive element, and a deformation of the magnetostrictive element. The induced electromotive force generating means for generating an induced electromotive force due to the change in the magnetic field generated by the magnetic field and the rectifying means such as a diode bridge for rectifying the generated induced electromotive force.

According to the action of the invention described in claim 4, one end of the magnetostrictive element is fixed in the footwear sole, and the magnetostrictive element is deformed by receiving a force applied from the outside to generate a magnetic field and further deformed. By doing so, the magnetic field changes.

At this time, the weight is housed in the sole of the footwear so as to move freely, and is fixed to the other end of the magnetostrictive element to deform the magnetostrictive element. Then, the induced electromotive force generating means generates an induced electromotive force due to a change in the magnetic field generated by the deformation of the magnetostrictive element.

After that, the rectifying means rectifies the generated induced electromotive force. Therefore, the induced electromotive force generated by the deformation of the magnetostrictive element based on the force applied to the weight due to the vibration caused by the walking or running of the user wearing the above-mentioned footwear is rectified, so that it can be maintained with a simple configuration. It is possible to realize a simple portable power generation device that can generate electricity efficiently.

Further, since the magnetostrictive element is used, damage is less likely to occur and stable power generation can be performed.
In order to solve the above-mentioned problems, the invention according to claim 5 is that the induced electromotive force is generated by moving the magnetic field generating means that is housed in the footwear sole and generates a magnetic field and the generated magnetic field. It comprises a coil and a rectifying means such as a diode bridge for rectifying the generated induced electromotive force.

According to the operation of the invention described in claim 5, the magnetic field generating means is housed in the footwear sole and generates a magnetic field.
At this time, an induced electromotive force is generated in the coil by moving in the generated magnetic field.

The rectifying means rectifies the generated induced electromotive force. Therefore, since the induced electromotive force generated in the coil is rectified by the coil moving in the magnetic field when the user wearing or wearing the above-mentioned footwear walks or runs, a simple portable power generator that can continuously generate power with a simple configuration. Can be realized.

In order to solve the above-mentioned problems, the invention according to claim 6 is the portable power generator according to claim 5, wherein the magnetic field generating means is fixed to one surface in the footwear sole. While the coil is in the magnetic field and is fixed to the other surface of the footwear sole that faces the one surface, the coil moves in the magnetic field to generate an induced electromotive force. Is composed of.

According to the operation of the invention described in claim 6, in addition to the operation of the invention described in claim 5, the magnetic field generating means includes:
The coil is fixed to one surface in the bottom of the footwear,
The coil is fixed to the other surface of the shoe bottom that is in the magnetic field and is opposed to the one surface, and since the coil moves in the magnetic field to generate an induced electromotive force, power can be efficiently generated.

In order to solve the above-mentioned problems, the invention according to claim 7 is the portable power generator according to claim 5 or 6, wherein the magnetic field generating means is a permanent magnet. .

According to the action of the invention described in claim 7, in addition to the action of the invention described in claim 5 or 6, since the magnetic field generating means is a permanent magnet, the portable power generator is inexpensively constructed. In addition, it is possible to perform stable power generation with less damage.

In order to solve the above-mentioned problems, the invention as set forth in claim 8 has one end fixed in the pedometer and generates a magnetic field by being deformed by receiving a force applied from the outside and further deformed. And a magnetostrictive element whose magnetic field changes by being accommodated movably in the pedometer and fixed to the other end of the magnetostrictive element to deform the magnetostrictive element, and the magnetostrictive element. The device includes an induced electromotive force generating unit that generates an induced electromotive force due to the change in the magnetic field caused by the deformation of the element, and a rectifying unit such as a diode bridge that rectifies the generated induced electromotive force.

According to the action of the invention described in claim 8, one end of the magnetostrictive element is fixed in the pedometer, and the magnetostrictive element generates a magnetic field by being deformed by receiving a force applied from the outside, and is further deformed. By doing so, the magnetic field changes.

At this time, the weight is housed movably in the pedometer and is fixed to the other end of the magnetostrictive element to deform the magnetostrictive element. Then, the induced electromotive force generating means generates an induced electromotive force due to a change in the magnetic field generated by the deformation of the magnetostrictive element.

After that, the rectifying means rectifies the generated induced electromotive force. Therefore, since the induced electromotive force generated by the deformation of the magnetostrictive element based on the force applied to the weight due to the vibration caused by the walking or running of the user carrying the pedometer is rectified, a simple configuration is provided. It is possible to realize a simple portable power generation device that can continuously generate power.

Further, since the magnetostrictive element is used, damage is less likely to occur and stable power generation can be performed.
In order to solve the above-mentioned problems, the invention according to claim 9 is the portable power generation device according to any one of claims 3, 4 and 8, wherein the induced electromotive force generating means includes the magnetostriction. The coil is wound around the element and is connected to the rectifying means.

According to the action of the invention described in claim 9, in addition to the action of the invention described in any one of claims 3, 4 and 8, the induced electromotive force generating means is wound around the magnetostrictive element. Since the coil is rotated and connected to the rectifying means, the induced electromotive force can be generated at a low cost with a simple configuration.

[0033] In order to solve the above-mentioned problems, a tenth aspect is provided.
The invention according to claim 3 is the portable power generation device according to any one of claims 3 to 9, which is configured to include a power storage unit such as a storage battery that stores the rectified induced electromotive force.

According to the operation of the tenth aspect of the present invention,
In addition to the action of the invention described in any one of claims 3 to 9, since the storage means stores the rectified induced electromotive force, the stored power is used when a large amount of power is required. can do.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described with reference to the drawings. (I) First Embodiment First, a first embodiment corresponding to the invention described in claims 1, 2, 3, 9 and 10 will be described with reference to FIGS. 1 and 2.

1 and 2 show an embodiment in which the portable power generator according to the present invention is incorporated in the heel of a shoe.
As shown in FIGS. 1 and 2, a portable power generator S ₁ according to the present embodiment includes a magnetostrictive element 10 fixed in a space 3 formed in a heel portion 2 of a shoe 1 as footwear, Coil 1 as an induced electromotive force generating means wound around the magnetostrictive element 10.
1, a diode bridge 12 as a rectifying means connected to the coil 11, and a storage battery 13 as a power storage means connected to the output end of the diode bridge 12.

Here, the magnetostrictive element 10 has its longitudinal end portions 10A and 10B fixed to the inner bottom side surface 3A and the front bottom side surface 3B in the space 3 by an adhesive or the like. , Co ₅₀ Fe ₅₀ (subscript indicates weight%), 0.8Co-2.2Fe-4O, or the like.

The diode bridge 12 and the storage battery 13 may be housed in the space 3 together with the magnetostrictive element 10 and the coil 11. Alternatively, only the diode bridge 12 and the storage battery 13 may be belted around the user's waist or the like. Alternatively, the diode bridge 12 and the coil 11 may be connected to each other.

Next, the operation will be described. When the user wearing the shoe 1 including the portable power generator S ₁ of the present embodiment walks or runs, the magnetostrictive element 10 fixed to the inner bottom side surface 3A and the front bottom side surface 3B in the space 3 As shown by the solid line arrow in FIG. 2, a force is applied in the direction of compressing and deforming the magnetostrictive element 10 when stepped on, and a force in the direction of extending and deforming the magnetostrictive element 10 when lifting the foot. Will join. Then, the magnetostrictive element 10 is deformed in the compression or expansion direction by the force applied in each direction. Then, in the magnetostrictive element 10, a change in magnetic field occurs in the direction indicated by the broken line arrow in FIG. 2, and an induced electromotive force is generated in the coil 11 due to this change in magnetic field.

Here, the magnitude of the induced electromotive force generated will be calculated for the case where the magnetostrictive element 10 is a single crystal. FIG.
, The induced electromotive force sought is e, and the magnetostrictive element 10 <
The magnetostriction constant in the 100> direction is λ ₁₀₀ , the pressure per unit area of the surface perpendicular to the direction in which the force is applied to the magnetostrictive element 10 is σ, and the area of the surface perpendicular to the direction in which the force of the magnetostrictive element 10 is applied is S. , Time is t, and a is a constant determined by the structure of the coil 11 wound around the magnetostrictive element 10 and the like, the direction in which the force is applied to the magnetostrictive element 10 and the <100> direction in the crystal plane of the magnetostrictive element 10. When the magnetostrictive element 10 is fixed so that and become parallel,

[0041]

[Equation 1] Therefore, the induced electromotive force e can be obtained from this relationship. In this way, the induced electromotive force generated in the coil 11 each time the user walks or runs is the diode bridge 1
2 is full-wave rectified and becomes a direct current and is stored in the storage battery 13. Then, it is used as a power source of a portable device or the like as needed.

In the above description, the magnetic field generated in the magnetostrictive element 10 in advance is changed by the deformation of the magnetostrictive element 10, and the induced electromotive force is generated by the change in the magnetic field. The present invention is not limited to this, the initial magnetic field is set to zero, a new magnetic field is generated each time walking or running, and it is equivalent to that the magnetic field passing through the coil 11 is substantially changed by the generation of this magnetic field. Therefore, induced electromotive force can be generated.

A large-capacity capacitor may be used instead of the storage battery 13. Further, in addition to the materials described as the material of the magnetostrictive element 10, dysprosium (D
y), terbium (Tb) and other heavy rare earth metals and iron (F
If a Laves type intermetallic compound (R—Fe ₂ ) alloy with (e) is used (so-called giant magnetostrictive element), the rate of change of the magnetic field that changes due to the deformation of the magnetostrictive element 10 also increases, so The induced electromotive force generated is also large, and efficient power generation can be performed.

As described above, according to the portable power generator S ₁ of the first embodiment, the guidance generated by the walking or running of the user wearing the shoe 1 incorporating the portable power generator S ₁ therein. Since the electromotive force is stored, it is possible to realize a simple portable power generation device that can continuously generate power with a simple configuration. In addition, since the magnetostrictive element 10 made of a metal-based material is used, it is less likely to be damaged than in the case of power generation using a ceramic-based material, and stable power generation can be performed. (II) Second Embodiment Next, a second embodiment corresponding to the invention described in claims 1, 2 , 4, 9 and 10 will be described with reference to FIG. In FIG. 3, the same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the above-described first embodiment, the magnetostrictive element 10 is fixed to the outsole side surface 3B and the insole side surface 3A of the space 3 formed in the heel portion 2 of the shoe 1, but in the second embodiment. A weight that can freely move in the space 3 is fixed to one end of the magnetostrictive element, and the magnetostrictive element is deformed by the gravity and the acceleration applied to the weight by a user's walking or running, and this deformation causes The magnetic field changes and induced electromotive force is generated.

As shown in FIG. 3, the portable power generator S ₂ according to the present embodiment has a longitudinal direction on the outsole side surface 3A of the space 3'formed in the heel portion 2'of the shoe 1'as footwear. One end 2
The magnetostrictive element 20 to which 0A is fixed, the weight 21 fixed to the other end of the magnetostrictive element 20 in the longitudinal direction and freely movable in the space 3 ′, and the coil wound around the magnetostrictive element 20. 11 and 11. The other configurations are similar to those of the first embodiment, and thus detailed description thereof will be omitted.

Here, one end 20A in the longitudinal direction of the magnetostrictive element 20 is fixed to the inner bottom side surface 3'A in the space 3'with an adhesive or the like. As the material of the magnetostrictive element 20, the same material as in the first embodiment is used.

Next, the operation will be described. When the user wearing the shoe 1 ′ equipped with the portable power generator S ₂ of the present embodiment walks or runs, the weight 21 is subjected to gravity and acceleration in the direction indicated by the solid arrow in FIG. Due to this gravity and acceleration, the magnetostrictive element 20 whose one end is fixed to the inner bottom side surface 3′A in the space 3 ′ is deformed in the direction of compression or extension. Then, in the magnetostrictive element 20, a change in the magnetic field occurs in the direction indicated by the dashed arrow in FIG. 3, and an induced electromotive force is generated in the coil 11 due to this change in the magnetic field. At this time, the magnitude of the induced electromotive force generated is the same as in the first embodiment.

Thereafter, in the same manner as in the first embodiment, the generated induced electromotive force is full-wave rectified by the diode bridge 12 and becomes a direct current and is stored in the storage battery 13. Then, it is used as a power source of a portable device or the like as needed.

In the second embodiment as well, as in the first embodiment, the initial magnetic field is set to zero so that a new magnetic field is generated each time the user walks or runs, and the generation of this magnetic field causes the coil to be substantially coiled. It is also possible to generate induced electromotive force, which is equivalent to a change in the magnetic field passing through 11.

Further, the giant magnetostrictive material described in the first embodiment can be used as the material of the magnetostrictive element 20. Furthermore, a large-capacity capacitor may be used instead of the storage battery 13.

As described above, according to the portable power generator S ₂ of the second embodiment, it is caused by walking or running of the user wearing the shoe 1 ′ incorporating the portable power generator S ₂ . Since the induced electromotive force is stored, it is possible to realize a simple portable power generation device capable of continuously generating power with a simple configuration, as in the first embodiment. Further, since the magnetostrictive element 10 made of a metallic material is used, it is less likely to be damaged,
Stable power generation can be performed. (III) Third Embodiment Next, a third embodiment corresponding to the invention described in claims 1, 2, 8 to 10 will be described with reference to FIG. In FIG. 4, the same members as those in the first or second embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted.

In the second embodiment described above, one end of the magnetostrictive element 20 is fixed to the midsole side surface 3A of the space 3 formed in the heel portion 2 of the shoe 1 ', and the weight 21 is fixed to the other end. However, in the third embodiment, one end of the magnetostrictive element is connected to a pedometer (pedometer).
The pedometer is fixed to one surface of the inside of the pedometer, and the other end of the pedometer is fixed to the weight.The weight of the pedometer vibrates when the user carrying the pedometer walks or runs, and the vibration causes the weight to move. The magnetostrictive element is deformed by the gravitational force and the acceleration applied to the element, thereby generating an induced electromotive force.

As shown in FIG. 4, the portable generator S ₃ according to the present embodiment has a magnetostrictive element 20 having one end 20A in the longitudinal direction fixed to one surface (for example, inside the upper surface) of the pedometer 30. A weight 21 fixed to the other end of the magnetostrictive element 20 in the longitudinal direction and freely movable in the space 31; and a coil 11 wound around the magnetostrictive element 20 as an induced electromotive force generating means. ing. The other configurations are similar to those of the first embodiment, and thus detailed description thereof will be omitted.

The diode bridge 12 and the storage battery 13 are held together with the pedometer 30 on the user's waist or the like by a belt 32 or the like. Here, one end 20A in the longitudinal direction of the magnetostrictive element 20 is fixed to the inside of the upper surface in the space 31 with an adhesive or the like. As the material of the magnetostrictive element 20, the same material as in the first embodiment is used.

Next, the operation will be described. When the user holding the pedometer 30 equipped with the portable power generator S ₃ of the present embodiment walks or runs, the weight 21 moves to the weight 21 due to the vertical movement.
Gravity and acceleration are applied in the direction indicated by the solid line arrow, and the magnetostrictive element 20 whose one end is fixed to the inside of the upper surface in the space 31 is deformed in the direction of compression or expansion by this gravity.
Then, similarly to the second embodiment, a change in the magnetic field occurs in the magnetostrictive element 20 in the direction indicated by the broken line arrow in FIG. 4, and an induced electromotive force is generated in the coil 11 due to the change in the magnetic field. At this time, the magnitude of the induced electromotive force generated is the same as in the first embodiment.

Thereafter, similarly to the first embodiment, the generated induced electromotive force is full-wave rectified by the diode bridge 12 and becomes a direct current and is stored in the storage battery 13. Then, it is used as a power source of a portable device or the like as needed.

In the third embodiment as well, as in the first embodiment, the initial magnetic field is set to zero so that a new magnetic field is generated each time the user walks or runs, and the generation of this magnetic field substantially causes the coil. It is also possible to generate induced electromotive force, which is equivalent to a change in the magnetic field passing through 11.

Further, the giant magnetostrictive material described in the first embodiment can be used as the material of the magnetostrictive element 20. Furthermore, one end 20A of the magnetostrictive element 20 may be fixed inside the lower surface inside the space 31.

A large-capacity capacitor may be used instead of the storage battery 13. As described above, according to the portable power generator S ₃ of the third embodiment, the induced electromotive force generated by the walking or running of the user who holds the pedometer 30 including the portable power generator S ₃ is used. Since the electric power is accumulated, it is possible to realize a simple portable power generation device capable of continuously generating electric power with a simple configuration, as in the first embodiment. Further, since the magnetostrictive element 20 made of a metal-based material is used, it is less likely to be damaged and stable power generation can be performed. (IV) Fourth Embodiment Next, a fourth embodiment corresponding to the invention described in claims 5 to 7 and 10 will be described with reference to FIG. In FIG. 5, the same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment described above, the magnetostrictive element 10 is fixed to the outer sole side surface 3B and the inner sole side surface 3A of the space 3 formed in the heel portion 2 of the shoe 1, but in the fourth embodiment. , A permanent magnet fixed to the side of the insole in the space of the heel,
The coil is wound around the permanent magnet and is fixed to the side surface of the bottom surface in the space, and the relative positional relationship between the permanent magnet and the oil is changed by the walking or running of the user. The magnetic field in the coil changes and an induced electromotive force is generated in the coil.

As shown in FIG. 5, the portable power generator S ₄ according to the present embodiment has an inner sole side surface 3 "A in a space 3" formed in a heel portion 2 "of a shoe 1" as footwear. A permanent magnet 40, one end of which is fixed to the
It is wound around 0 and the bottom side 3 "B in the space 3"
The coil 11 as an induced electromotive force generation means is fixed to the coil 11 via a fixture 41. Other configurations are the first
Since it is the same as the embodiment, detailed description is omitted.

Here, the end 40A of the permanent magnet 40 in the longitudinal direction is fixed to the inner bottom side surface 3 "A in the space 3" with an adhesive or the like. Next, the operation will be described.

When a user wearing shoes 1 "equipped with the portable power generator S ₄ of the present embodiment walks or runs, the height t of the space 3" is increased by the pressure applied to the heel portion 2 "when the user steps down. The heel portion 2 ″ is deformed so as to be lowered (contracted), and when the foot is raised, the heel portion 2 ″ is deformed so that the height t of the space 3 ″ returns to the original height. Then, every time walking or running, the positional relationship between the coil 11 fixed to the outer bottom side surface 3 "B in the space 3" and the permanent magnet 40 generating a constant magnetic field in the direction of the broken line arrow in FIG. Changes. That is, when the heel portion 2 ″ is deformed so that the height t of the space 3 ″ is lowered by the user's stepping, the coil 11 moves with respect to the permanent magnet 40 as shown by the upward solid arrow in FIG. On the contrary, when the heel portion 2 ″ is deformed so that the height t of the space 3 ″ returns to the original height when the user raises his / her foot, the coil 11 moves relative to the permanent magnet 40 in FIG. Move as indicated by the downward solid arrow. In this way, the permanent magnet 40 moves with respect to the coil 11 each time the user walks or runs, so that the magnetic field inside the coil 11 changes substantially, and the induced electromotive force in the coil 11 changes due to this change in the magnetic field. Occur.

Here, when the magnitude of the induced electromotive force to be generated is calculated, in FIG.
Assuming that the magnetic flux generated by the permanent magnet 40 is φ and the time is t, as shown in FIG. 5, when the coil 11 is wound in parallel to the direction connecting the N pole and the S pole of the permanent magnet 40,

[0066]

(Equation 2) Therefore, the induced electromotive force e ′ can be obtained from this relationship. In this way, the induced electromotive force generated in the coil 11 every time the user walks or runs is full-wave rectified by the diode bridge 12 and stored in the storage battery 13 as a direct current, as in the first embodiment. It Then, it is used as a power source of a portable device or the like as needed.

Further, a large capacity capacitor may be used instead of the storage battery 13. As described above, according to the portable power generator S ₄ of the fourth embodiment, the induced electromotive force generated by the walking or running of the user wearing the shoe 1 ″ incorporating the portable power generator S ₄ therein. Since a permanent magnet 40 made of a metal-based material is used, power can be generated using a ceramic-based material because a permanent magnet 40 made of a metal-based material is used. It is less likely to be damaged than in the case, and stable power generation can be performed.

Although the permanent magnet 40 is fixed to the inner bottom side surface 3 "A in the space 3" and the coil 11 is fixed to the outer bottom side surface 3 "B in the fourth embodiment. However, not limited to this, the permanent magnet 40 may be fixed to the front bottom side surface 3 "B in the space 3", and the coil 11 may be fixed to the middle bottom side surface 3 "A.

[0069]

As described above, according to the invention described in claim 1, in the magnetic field changing process, the magnetostrictive element is deformed to change the magnetic field, and in the induced electromotive force generating process, the change of the magnetic field is caused. Generate induced electromotive force.

Therefore, since the magnetostrictive element is used, the magnetostrictive element is less likely to be damaged, and continuous stable power generation can be performed. Further, by reducing the size of the magnetostrictive element, it is possible to generate electricity without increasing the size of the entire device.

According to the second aspect, a magnetic field is generated by being deformed by receiving a force applied from the outside, and the magnetostrictive element whose magnetic field is changed by further deformation is used to generate electric power. The magnetostrictive element is less likely to be damaged, and stable power generation can be continuously performed.

Further, by reducing the size of the magnetostrictive element, it is possible to realize a power generation device that can generate power without increasing the size of the entire power generation device. According to the invention described in claim 3, the magnetic field is changed by the deformation of the magnetostrictive element by the force applied to the magnetostrictive element by the walking or running of the user wearing the footwear, and the magnetic field is generated by the change of the magnetic field. Since the induced electromotive force is rectified to generate power, it is possible to realize a simple portable power generation device that can continuously generate power with a simple configuration.

Further, since the magnetostrictive element is used, damage is less likely to occur and stable power generation can be performed.
According to the invention described in claim 4, the induced electromotive force generated by the deformation of the magnetostrictive element based on the force applied to the weight due to the vibration caused by the walking or running of the user wearing the footwear is rectified. Since the electric power is generated in this manner, it is possible to realize a simple portable power generation device that can continuously generate electric power with a simple configuration.

Further, since the magnetostrictive element is used, damage is less likely to occur and stable power generation can be performed.
According to the invention of claim 5, the coil rectifies the induced electromotive force generated in the coil by moving in the magnetic field by the walking or running of the user wearing the footwear to generate power, and thus the sustainability is simple and continuous. It is possible to realize a simple portable power generation device capable of generating electricity.

According to the invention of claim 6, claim 5
In addition to the effect of the invention described in (1), the magnetic field generating means is fixed to one surface in the footwear sole, and the coil is in another magnetic field and faces the one surface in the footwear sole. Since it is fixed to the surface and the coil moves in the magnetic field to generate an induced electromotive force, power can be efficiently generated.

According to the invention of claim 7, claim 5
Further, in addition to the effects of the invention described in 6, the magnetic field generating means is a permanent magnet, so that the portable power generation device can be configured at low cost, and it is less likely to be damaged and stable power generation can be performed. .

According to the eighth aspect of the invention, the induction generated by the deformation of the magnetostrictive element based on the force applied to the weight due to the vibration caused by the walking or running of the user carrying the pedometer Since the electromotive force is rectified to generate power, it is possible to realize a simple portable power generation device that can continuously generate power with a simple configuration.

Further, since the magnetostrictive element is used, damage is less likely to occur and stable power generation can be performed.
According to the invention described in claim 9, in addition to the effect of the invention described in any one of claims 3, 4 or 8, the induced electromotive force generating means is wound around the magnetostrictive element, and the rectifying means is provided. Since the coil is connected to, the induced electromotive force can be generated at a low cost with a simple configuration.

According to the invention of claim 10, in addition to the effect of the invention of any one of claims 3 to 9,
Since the power storage means stores the rectified induced electromotive force, it is possible to use the stored electric power when a large amount of electric power is required.

[Brief description of the drawings]

FIG. 1 is a diagram showing shoes incorporating a portable power generator according to an embodiment.

FIG. 2 is a diagram showing a configuration of a portable power generator of the first embodiment.

FIG. 3 is a diagram showing a configuration of a portable power generator of a second embodiment.

FIG. 4 is a diagram showing a configuration of a portable power generator of a third embodiment.

FIG. 5 is a diagram showing a configuration of a portable power generation device according to a fourth embodiment.

[Explanation of symbols]

1, 1 ', 1 "... Shoes 2, 2', 2" ... Heel part 3, 3 ', 3 ", 31 ... Space 3A, 3'A, 3" A ... Insole side surface 3B, 3'B, 3 "B ... Outer bottom side surface 10, 20 ... Magnetostrictive element 10A, 10B, 20A ... End portion 11 ... Coil 12 ... Diode bridge 13 ... Storage battery 21 ... Weight 30 ... Pedometer 32 ... Belt 40 ... Permanent magnet 40A ... End portion 41" ... fixture _{S 1, S 2, S 3} , S 4 ... portable generator device t ... height

Claims (10)

[Claims] 1. A magnetic field changing process of changing a magnetic field by generating a magnetic field by deforming by receiving a force applied from the outside and changing the magnetic field by further deforming the magnetostrictive element. An induced electromotive force generating step of generating an induced electromotive force according to the change of the magnetic field; 2. A magnetostrictive element that generates a magnetic field by being deformed by receiving a force applied from the outside, and the magnetic field is changed by further deformation, and an induction device that generates an induced electromotive force by the change of the magnetic field. An electromotive force generating means, and a power generation device comprising: 3. A magnetostrictive element, which is fixed in the footwear sole, generates a magnetic field by being deformed by receiving a force applied from the outside, and which further changes the magnetic field, and a magnetostrictive element of the magnetostrictive element. A portable power generation device comprising: an induced electromotive force generating unit that generates an induced electromotive force due to a change in the magnetic field caused by deformation; and a rectifying unit that rectifies the generated induced electromotive force. 4. A magnetostrictive element, one end of which is fixed in the footwear sole and which is deformed by receiving a force applied from the outside to generate a magnetic field, and which is further deformed to change the magnetic field, and the footwear sole. An electromotive force is generated by a weight, which is housed freely inside and is fixed to the other end of the magnetostrictive element and which deforms the magnetostrictive element, and a change in the magnetic field caused by the deformation of the magnetostrictive element. A portable power generation device comprising: an induced electromotive force generating means; and a rectifying means for rectifying the generated induced electromotive force. 5. A magnetic field generating means that is housed in a shoe bottom and generates a magnetic field, a coil that generates an induced electromotive force by moving in the generated magnetic field, and a rectifier that rectifies the generated induced electromotive force. A portable power generation device comprising: 6. The portable power generator according to claim 5, wherein the magnetic field generating means is fixed to one surface in the footwear sole, and the coil is in the magnetic field and the footwear sole. A portable power generation device, which is fixed to another surface of the coil, which is opposed to the one surface, and generates induced electromotive force when the coil moves in the magnetic field. 7. The portable power generator according to claim 5 or 6, wherein the magnetic field generating means is a permanent magnet. 8. A pedometer, one end of which is fixed in the pedometer, and a magnetic field is generated by deforming by receiving a force applied from the outside, and the magnetic field is changed by further deformation, and the pedometer. A weight that is housed movably inside and is fixed to the other end of the magnetostrictive element and that deforms the magnetostrictive element, and an induced electromotive force is generated by the change in the magnetic field caused by the deformation of the magnetostrictive element. A portable power generation device comprising: an induced electromotive force generating means; and a rectifying means for rectifying the generated induced electromotive force. 9. The portable power generator according to claim 3, 4 or 8, wherein the induced electromotive force generating means is wound around the magnetostrictive element and connected to the rectifying means. A portable power generator characterized by being a coil. 10. The portable power generator according to claim 3, further comprising a power storage unit that stores the rectified induced electromotive force. .