JP7117838B2 - vibration generator - Google Patents

Description

The present invention relates to an oscillating power generator.

Vibration power generators generate electricity by converting kinetic energy from vibrations into electrical energy. A vibration power generator includes a coil and a permanent magnet, as described in Patent Document 1, for example. In Patent Literature 1, the vibration causes the permanent magnet to vibrate relative to the coil. The north pole and south pole of the permanent magnet are aligned along the vibration direction of the permanent magnet.

JP 2014-50204 A

The present inventor has studied a novel structure for realizing power generation by vibration.

An object of the present invention is to realize power generation by vibration with a novel structure.

According to the invention,
a coil having an axial direction and wound around the axial direction;
a magnetic portion located in one of the area surrounding the coil and the area surrounded by the coil;
with
one of the coil and the magnetic portion is movable along the axial direction of the coil with respect to the other of the coil and the magnetic portion;
The coil is
a first region capable of generating an electromotive force in one direction due to changes in magnetic flux;
a second region connected in series with the first region and capable of generating an electromotive force in a direction opposite to that of the first region by the same magnetic flux change as the magnetic flux change;
has
The magnetic part is
a first portion of a first polarity and a second portion of a second polarity opposite to the first polarity aligned with the first portion in a direction crossing the axial direction of the coil; a first magnetic portion magnetized from one of the first portion and the second portion to the other;
a third portion of the second polarity aligned with the first portion of the first magnetic portion in the axial direction of the coil; and a fourth portion of the first polarity aligned with the second portion of the first magnetic portion in the axial direction of the coil, and magnetized from one of the third portion and the fourth portion to the other. a second magnetic part,
has
The length of the first region in the axial direction of the coil is either the length of the first magnetic portion in the axial direction of the coil or the length of the second magnetic portion in the axial direction of the coil. is equal to
The length of the second region in the axial direction of the coil is either the length of the first magnetic portion in the axial direction of the coil or the length of the second magnetic portion in the axial direction of the coil. There is also provided an oscillating power generator that is equal to
According to the invention,
a coil having an axial direction and wound around the axial direction;
a magnetic portion located in one of the area surrounding the coil and the area surrounded by the coil;
with
one of the coil and the magnetic portion is movable along the axial direction of the coil with respect to the other of the coil and the magnetic portion;
The magnetic part is
a first portion of a first polarity and a second portion of a second polarity opposite to the first polarity aligned with the first portion in a direction crossing the axial direction of the coil; a first magnetic portion magnetized from one of the first portion and the second portion to the other;
a third portion of the second polarity aligned with the first portion of the first magnetic portion in the axial direction of the coil; and a fourth portion of the first polarity aligned with the second portion of the first magnetic portion in the axial direction of the coil, and magnetized from one of the third portion and the fourth portion to the other. a second magnetic part,
It is positioned on the side opposite to the side on which the second magnetic part is positioned with respect to the first magnetic part, and both the first part and the second part of the first magnetic part are arranged in the axial direction of the coil. a fifth portion of one of the first polarity and the second polarity arranged side by side; a third magnetic portion having a polarity opposite to the polarity of the fifth portion and being aligned with the fifth portion, the third magnetic portion being magnetized from one to the other of the fifth portion and the sixth portion; ,
It is positioned on the side opposite to the side on which the first magnetic part is positioned with respect to the second magnetic part, and both the third part and the fourth part of the second magnetic part in the axial direction of the coil. A seventh portion that is aligned and has a polarity opposite to that of the fifth portion, and a magnetic field that extends in the axial direction of the coil and is located on the side opposite to the side on which the second magnetic portion is located with respect to the seventh portion. a fourth magnetic portion having a polarity opposite to the polarity of the seventh portion and being aligned with the seventh portion, the fourth magnetic portion being magnetized from one to the other of the seventh portion and the eighth portion; When,
An oscillating power generator is provided.

ADVANTAGE OF THE INVENTION According to this invention, the electric power generation by vibration can be implement|achieved by a novel structure.

1 is a plan view showing an oscillating power generator according to Embodiment 1. FIG. 2 is a cross-sectional view taken along line AA' of FIG. 1; FIG. It is a figure for demonstrating an example of the coil shown in FIG.1 and FIG.2. FIG. 3 is a diagram for explaining an example of power generation by the vibration power generator shown in FIGS. 1 and 2; FIG. It is a figure which shows the 1st modification of FIG. FIG. 6 is a cross-sectional view taken along the line AA′ of FIG. 5; It is a figure which shows the 2nd modification of FIG. FIG. 8 is a cross-sectional view taken along the line AA' of FIG. 7; It is a figure which shows the 3rd modification of FIG. FIG. 10 is a cross-sectional view taken along the line AA' of FIG. 9; FIG. 8 is a plan view showing an oscillating power generator according to Embodiment 2; FIG. 12 is a cross-sectional view taken along the line AA′ of FIG. 11; FIG. 12 is a diagram showing a first modification of FIG. 11; FIG. 14 is a cross-sectional view taken along the line AA' of FIG. 13; FIG. 12 is a diagram showing a second modification of FIG. 11; FIG. 16 is a cross-sectional view taken along the line AA′ of FIG. 15; FIG. 12 is a diagram showing a third modification of FIG. 11; FIG. 18 is a cross-sectional view taken along the line AA′ of FIG. 17; FIG. 11 is a cross-sectional view showing an oscillating power generator according to Embodiment 3; FIG. 11 is a cross-sectional view showing an oscillating power generator according to Embodiment 4; FIG. 11 is a cross-sectional view showing an oscillating power generator according to Embodiment 5; FIG. 22 is a diagram showing a modification of FIG. 21; FIG. 12 is a cross-sectional view showing an oscillating power generator according to Embodiment 6; FIG. 11 is a diagram for explaining a first example of a first magnetic portion according to Embodiment 7; FIG. 21 is a diagram for explaining a second example of the first magnetic portion according to Embodiment 7; FIG. 14 is a diagram for explaining a third example of the first magnetic portion according to Embodiment 7; 27 is a diagram for explaining a holding member for holding a plurality of first magnetic portions shown in FIG. 26; FIG. FIG. 28 is a diagram for explaining a method of holding a plurality of first magnetic portions on the holding member shown in FIG. 27; FIG. 29 is a cross-sectional view taken along the line BB′ of FIG. 28; 4 is a graph showing results of electromotive force generated by the vibration power generator according to the example.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in all the drawings, the same constituent elements are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

(Embodiment 1)
FIG. 1 is a plan view showing an oscillating power generator 10 according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view taken along the line AA' of FIG.

An overview of the vibration power generator 10 will be described with reference to FIG. The vibration power generator 10 includes a coil 100 and a first magnetic section 210 . The coil 100 has an axial direction (the Z direction in the example shown in FIG. 2). The coil 100 is wound around the axial direction. The first magnetic section 210 includes a first portion 212 and a second portion 214 . The first magnetic part 210 is located near the coil 100 . The first portion 212 has a first polarity (South pole in the example shown in FIG. 2). The second portion 214 is of a second polarity (north pole in the example shown in FIG. 2) opposite the first polarity. The first magnetic portion 210 is magnetized from one of the first portion 212 and the second portion 214 to the other. One of the coil 100 and the first magnetic part 210 is movable with respect to the other of the coil 100 and the first magnetic part 210 along the axial direction of the coil 100 (the Z direction in the example shown in FIG. 2). there is The first portion 212 and the second portion 214 of the first magnetic portion 210 are arranged in a direction crossing the axial direction of the coil 100 (X direction in the example shown in FIG. 2).

According to the configuration described above, it is possible to generate power by vibration. Specifically, in the configuration described above, the first magnetic portion 210 can generate a magnetic line of force in the direction from the coil 100 toward the first magnetic portion 210 (the first portion 212 is the N pole and the second When the portion 214 is the south pole, it is possible to generate magnetic lines of force in the direction from the first magnetic portion 210 toward the coil 100.). When one of the coil 100 and the first magnetic part 210 moves relative to the other of the coil 100 and the first magnetic part 210 due to vibration, a voltage is generated in the coil 100 by electromagnetic induction. Therefore, power generation by vibration can be performed.

Furthermore, according to the configuration described above, it is possible to increase the voltage obtained by power generation. Specifically, in the configuration described above, the lines of magnetic force generated by the first magnetic portion 210 concentrate at the ends of the first portion 212 and the ends of the second portion 214 . In the configuration described above, the portion where the lines of magnetic force concentrate (the end of the first portion 212 ) can be opposed to the coil 100 . Therefore, the magnetic field that the coil 100 receives from the first magnetic portion 210 can be increased. Therefore, the voltage obtained by power generation can be increased.

In the following, the first polarity is south pole and the second polarity is north pole. The first and second polarities may be north and south, respectively. As is clear from the description of this embodiment, the configuration of this embodiment is applicable even if the first and second polarities are N pole and S pole, respectively.

Details of the planar structure of the vibration power generator 10 will be described with reference to FIG.

The coil 100 has a cylindrical shape. The shape of the coil 100 is not limited to the example shown in FIG. As is clear from the description of this embodiment, according to this embodiment, it is possible to generate power by vibration without depending on the shape of the coil 100 .

The first magnetic part 210 is positioned outside the coil 100 in a region surrounding the coil 100 . The first portion 212 and the second portion 214 are arranged in a direction toward the outside of the coil 100 . In the example shown in FIG. 1, first portion 212 (south pole) is located closer to coil 100 than second portion 214 (north pole). As is clear from the description of this embodiment, the north pole may be positioned closer to the coil 100 than the south pole.

Details of the cross-sectional structure of the vibration power generator 10 will be described with reference to FIG.

In the example shown in FIG. 2, the first magnetic part 210 is a permanent magnet. The first magnetic portion 210 is magnetized in the direction toward the outside of the coil 100 . By magnetization, the first magnetic portion 210 (permanent magnet) has an S pole (first portion 212) and an N pole (second portion 214).

One of the coil 100 and the first magnetic part 210 is vibrated in one direction (Z direction) with respect to the other of the coil 100 and the first magnetic part 210 by vibration (for example, vibration given from the outside of the vibration power generator 10). It is movable. The first magnetic part 210 may be the mover, or the coil 100 may be the mover.

FIG. 3 is a diagram for explaining an example of the coil 100 shown in FIGS. 1 and 2. FIG.

The coil 100 includes a conductive wire extending in a spiral along one direction (the Z direction in FIG. 3). The conductive wire material can be, for example, a metal wire, more specifically, for example, a copper wire.

FIG. 4 is a diagram for explaining an example of power generation by the vibration power generator 10 shown in FIGS. 1 and 2. FIG.

In the example shown in FIG. 4, the coil 100 has a shape similar to that shown in FIG. FIG. 4 shows a cross-section of each turn of coil 100 .

As indicated by the black arrow in FIG. 4, in the vicinity of the first portion 212 of the first magnetic portion 210, magnetic lines of force are generated in the direction from the coil 100 toward the first magnetic portion 210 (when the first portion 212 is the N pole, , magnetic lines of force are generated in the direction from the first magnetic part 210 to the coil 100.). The vibration power generator 10 can generate power by these magnetic lines of force.

FIG. 5 is a diagram showing a first modification of FIG. FIG. 6 is a cross-sectional view taken along the line AA' of FIG.

The first magnetic part 210 may be in the area surrounded by the coil 100 , that is, inside the coil 100 . In the examples shown in FIGS. 5 and 6 as well, the location where the lines of magnetic force are concentrated (the end of the first portion 212) can be made to face the coil 100. FIG. Therefore, the magnetic field that the coil 100 receives from the first magnetic portion 210 can be increased. In the examples shown in FIGS. 5 and 6, as in the examples shown in FIGS. 1 and 2, power generation by vibration can be performed, and the voltage obtained by the power generation can be increased.

FIG. 7 is a diagram showing a second modification of FIG. 8 is a cross-sectional view taken along the line AA' of FIG. 7. FIG.

The vibration power generator 10 comprises two coils 100, a coil 100a and a coil 100b. Coil 100a is in the area surrounded by coil 100b, ie inside coil 100b, and coil 100b is in the area surrounding coil 100a, ie outside coil 100a. In the example shown in FIG. 7, the coil 100a and the coil 100b are coaxial.

The first magnetic portion 210 is between the coils 100a and 100b. In other words, the first magnetic part 210 is in the area surrounding the coil 100a, that is, outside the coil 100a, and in the area surrounded by the coil 100b, that is, inside the coil 100b.

By moving one of the coil 100a and the first magnetic part 210 in one direction (Z direction) with respect to the other of the coil 100a and the first magnetic part 210, similar to the example shown in FIGS. , an induced electromotive force is generated in the coil 100a.

By moving one of the coil 100b and the first magnetic part 210 in one direction (the Z direction) with respect to the other of the coil 100b and the first magnetic part 210, similar to the examples shown in FIGS. , an induced electromotive force is generated in the coil 100b.

In the examples shown in FIGS. 7 and 8, the first magnetic part 210 can be the mover. In this case, even if the coils 100a and 100b are not vibrated, only the first magnetic portion 210 is moved, so that an induced electromotive force can be generated in both the coils 100a and 100b.

FIG. 9 is a diagram showing a third modification of FIG. 10 is a cross-sectional view taken along the line AA' of FIG. 9. FIG.

As shown in FIG. 9, the coil 100 has a length L1 in one direction (X direction) and a length L2 in a direction orthogonal to this one direction (Y direction). Length L1 is shorter than length L2. That is, the coil 100 is thin in the X direction.

In the example shown in FIGS. 9 and 10, two first magnetic parts 210 separated from each other are arranged in the X direction with the coil 100 interposed therebetween. In any first magnetic portion 210 , the first portion 212 is positioned closer to the coil 100 than the second portion 214 . Therefore, in the same way as the example shown in FIGS. 1 and 2, power generation by vibration can be performed, and the voltage obtained by power generation can be increased.

According to the examples shown in FIGS. 9 and 10, the thickness of the coil 100 can be reduced in the X direction, that is, the direction intersecting the moving direction (Z direction) of the coil 100 or the first magnetic section 210 . Therefore, the thickness of the vibration power generator 10 in the direction (X direction) intersecting the moving direction (Z direction) of the coil 100 or the first magnetic part 210 can be reduced.

(Embodiment 2)
FIG. 11 is a plan view showing the vibration power generator 10 according to the second embodiment, and corresponds to FIG. 1 of the first embodiment. FIG. 12 is a sectional view taken along line AA' of FIG. 11 and corresponds to FIG. 2 of the first embodiment. The oscillating power generator 10 according to this embodiment is the same as the oscillating power generator 10 according to the first embodiment except for the following points.

The vibration power generator 10 has a yoke 300 and a shaft 400 . Yoke 300 surrounds shaft 400 . The yoke 300 is positioned inside the area surrounded by the coil 100 , that is, inside the coil 100 . The first magnetic part 210 is positioned outside the coil 100 in a region surrounding the coil 100 .

According to the configuration described above, the magnetic field that the coil 100 receives from the first magnetic portion 210 can be further increased. Specifically, in the configuration described above, the yoke 300 is positioned inside the coil 100 and the first magnetic portion 210 is positioned outside the coil 100 . Therefore, the lines of magnetic force that the coil 100 receives from the first magnetic portion 210 are further concentrated by the yoke 300 . Therefore, the magnetic field that the coil 100 receives from the first magnetic portion 210 can be further increased.

FIG. 13 is a diagram showing a first modification of FIG. 11 and corresponds to FIG. 5 of the first embodiment. FIG. 14 is a cross-sectional view taken along line AA' of FIG. 13 and corresponds to FIG. 6 of the first embodiment. The example shown in FIGS. 13 and 14 is similar to the example shown in FIGS. 5 and 6, except for the following points.

The first magnetic part 210 is positioned inside the area surrounded by the coil 100 , that is, inside the coil 100 . The yoke 300 is positioned outside the coil 100 in a region surrounding the coil 100 . In the example shown in FIGS. 13 and 14 as well, the magnetic field that the coil 100 receives from the first magnetic section 210 can be increased in the same manner as the example shown in FIGS. 11 and 12 .

FIG. 15 is a diagram showing a second modification of FIG. 11, and corresponds to FIG. 7 of the first embodiment. FIG. 16 is a cross-sectional view taken along line AA' of FIG. 15 and corresponds to FIG. 8 of the first embodiment. The examples shown in FIGS. 15 and 16 are similar to the examples shown in FIGS. 7 and 8, except for the following points.

The vibration power generator 10 comprises two yokes 300, namely a yoke 300a and a yoke 300b. The yoke 300a is positioned inside the area surrounded by the coil 100a, that is, inside the coil 100a. The yoke 300b is located in the area surrounding the coil 100b, that is, outside the coil 100b.

The yoke 300a can increase the magnetic field that the coil 100a receives from the first magnetic section 210 in the same manner as in the examples shown in FIGS.

The yoke 300b can increase the magnetic field that the coil 100b receives from the first magnetic section 210 in the same manner as in the examples shown in FIGS.

FIG. 17 is a diagram showing a third modification of FIG. 11 and corresponds to FIG. 9 of the first embodiment. FIG. 18 is a cross-sectional view taken along line AA' of FIG. 17 and corresponds to FIG. 10 of the first embodiment. The example shown in FIGS. 17 and 18 is similar to the example shown in FIGS. 9 and 10, except for the following points.

The yoke 300 is positioned inside the area surrounded by the coil 100 , that is, inside the coil 100 . Therefore, similarly to the example shown in FIGS. 11 and 12, the magnetic field that the coil 100 receives from the first magnetic portion 210 can be increased.

(Embodiment 3)
FIG. 19 is a cross-sectional view showing the vibration power generator 10 according to the third embodiment, and corresponds to FIG. 2 of the first embodiment. The oscillating power generator 10 according to this embodiment is the same as the oscillating power generator 10 according to the first embodiment except for the following points.

Coil 100 has a first region 102 and a second region 104 . The first region 102 is capable of generating an electromotive force in one direction due to changes in magnetic flux. The second region 104 is connected in series with the first region 102 . The second region 104 can generate an electromotive force in the opposite direction to the first region 102 by the same magnetic flux change as the magnetic flux change. For example, if the coil 100 is spirally extended and includes wire as shown in FIG. direction is wound.

The vibration power generator 10 has a magnetic part 200 . The magnetic section 200 has a first magnetic section 210 and a second magnetic section 220 . The first magnetic section 210 has a first portion 212 and a second portion 214 . The first portion 212 is of the first polarity (South pole). The second portion 214 is of the second polarity (north pole). The first magnetic portion 210 is magnetized from one of the first portion 212 and the second portion 214 to the other. The second magnetic section 220 has a third portion 222 and a fourth portion 224 . The third portion 222 is of the second polarity (north pole). The fourth portion 224 is the first polarity (South pole). The second magnetic portion 220 is magnetized from one of the third portion 222 and the fourth portion 224 to the other.

One of the coil 100 and the magnetic portion 200 is movable in the axial direction (Z direction) of the coil 100 with respect to the other of the coil 100 and the magnetic portion 200 . The first portion 212 and the second portion 214 of the first magnetic portion 210 are arranged in a direction (X direction) intersecting the axial direction of the coil 100 . The third portion 222 and the fourth portion 224 of the second magnetic portion 220 are arranged in a direction (X direction) intersecting the axial direction of the coil 100 . The first portion 212 of the first magnetic portion 210 and the third portion 222 of the second magnetic portion 220 are arranged in the axial direction (Z direction) of the coil 100 . The second portion 214 of the first magnetic portion 210 and the fourth portion 224 of the second magnetic portion 220 are arranged in the axial direction (Z direction) of the coil 100 .

According to the configuration described above, it is possible to generate power by vibration. Specifically, in the configuration described above, the first magnetic portion 210 passes through the vicinity of the first region 102 along one direction (Z direction), and at the same time, the second magnetic portion 220 moves along one direction (Z direction). induced electromotive force is generated in the same direction in the first region 102 and the second region 104 when passing the vicinity of the second region 104 along. Therefore, the sum of the induced electromotive force generated from the first region 102 and the induced electromotive force generated from the second region 104 is obtained from the coil 100 . Similarly, the first magnetic portion 210 passes through the vicinity of the second region 104 along one direction (Z direction), and at the same time, the second magnetic portion 220 passes through the first region 102 along one direction (Z direction). When passing nearby, an induced electromotive force is generated in the same direction in the first region 102 and the second region 104 . Therefore, the sum of the electromotive force generated from the first region 102 and the electromotive force generated from the second region 104 is obtained from the coil 100 .

In the example shown in FIG. 19, the magnetic section 200 has a permanent magnet 200a and a permanent magnet 200b. The permanent magnets 200a and 200b are arranged in the moving direction (Z direction) of the coil 100 or the magnetic portion 200. As shown in FIG. The permanent magnets 200a and 200b are magnetized in a direction (X direction) intersecting the moving direction. The permanent magnet 200 a serves as the first magnetic portion 210 and the permanent magnet 200 b serves as the second magnetic portion 220 . The S pole (first portion 212) of permanent magnet 200a and the N pole (third portion 222) of permanent magnet 200b attract each other without repulsion. Similarly, the north pole (second portion 214) of permanent magnet 200a and the south pole (fourth portion 224) of permanent magnet 200b attract each other without repulsion. Therefore, the permanent magnet 200a (first magnetic portion 210) and the permanent magnet 200b (second magnetic portion 220) can be easily arranged in the movement direction (Z direction).

In the example shown in FIG. 19, the coil 100 has multiple first regions 102 and multiple second regions 104 . The plurality of first regions 102 and the plurality of second regions 104 are alternately arranged in the movement direction (Z direction) of the coil 100 or the magnetic section 200 . Therefore, when one of the coil 100 and the magnetic section 200 moves in one direction (the Z direction) with respect to the other of the coil 100 and the magnetic section 200, a positive induced electromotive force and a negative induced electromotive force are alternately generated from the coil 100. Occur.

In the example shown in FIG. 19, in the axial direction (Z direction) of the coil 100, the first region 102, the second region 104, the first magnetic portion 210 (permanent magnet 200a), and the second magnetic portion 220 (permanent magnet 200b) are , have lengths L1, L2, L3 and L4, respectively.

The length L1 of the first region 102 may be greater than or equal to the length L3 of the first magnetic portion 210 . In this case, the magnetic field that the first region 102 receives from the first magnetic part 210 can be substantially maximized. Specifically, if the length L1 of the first region 102 is shorter than the length L3 of the first magnetic portion 210, part of the magnetic lines of force concentrated at the end of the first portion 212 of the first magnetic portion 210 Coil 100 cannot receive. On the other hand, when the length L1 of the first region 102 is equal to or longer than the length L3 of the first magnetic portion 210, almost all of the magnetic lines of force concentrated at the end of the first portion 212 of the first magnetic portion 210 are coiled. 100 can be received. Therefore, the magnetic field that the first region 102 receives from the first magnetic part 210 can be substantially maximized.

Similarly, the length L1 of the first region 102 may be greater than or equal to the length L4 of the second magnetic portion 220 so as to substantially maximize the magnetic field received by the second magnetic portion 220 in the first region 102 . Similarly, the length L2 of the second region 104 may be equal to or greater than the length L3 of the first magnetic portion 210 to substantially maximize the magnetic field received by the second region 104 by the first magnetic portion 210 . Similarly, the length L2 of the second region 104 may be greater than or equal to the length L4 of the second magnetic portion 220 so as to substantially maximize the magnetic field received by the second region 104 by the second magnetic portion 220 .

The length L1 of the first region 102 may be substantially equal to the length L3 of the first magnetic section 210 . In this case, it is possible to substantially minimize the time during which the magnetic field received by the first magnetic portion 210 in the first region 102 is maximized (that is, minimize the time during which the magnetic flux does not change). Specifically, when the length L1 of the first region 102 is substantially equal to the length L3 of the first magnetic portion 210, both ends of the first region 102 in the Z direction are equal to both ends of the first magnetic portion 210 in the Z direction. , the magnetic field that the first region 102 receives from the first magnetic portion 210 is substantially maximum. On the other hand, if both ends of the first region 102 in the Z direction are slightly displaced from both ends of the first magnetic part 210 in the Z direction, the magnetic field that the first region 102 receives from the first magnetic part 210 decreases. Therefore, it is possible to substantially minimize the time during which the magnetic field received by the first magnetic portion 210 in the first region 102 is maximized (that is, minimize the time during which the magnetic flux does not change).

Similarly, the length L1 of the first region 102 is substantially the same as the length L4 of the second magnetic portion 220 in order to substantially minimize the time during which the first region 102 receives the maximum magnetic field from the second magnetic portion 220. may be physically equal. Similarly, the length L2 of the second region 104 is substantially the same as the length L3 of the first magnetic portion 210 in order to substantially minimize the time during which the magnetic field received by the first magnetic portion 210 in the second region 104 is maximum. may be physically equal. Similarly, the length L2 of the second region 104 is substantially the same as the length L4 of the second magnetic portion 220 in order to substantially minimize the time during which the magnetic field received by the second magnetic portion 220 in the second region 104 is maximum. may be physically equal.

As is clear from the description of this embodiment, the configuration of this embodiment can be applied without depending on the position of the magnetic portion 200 . For example, even if the magnetic portion 200 is positioned inside the coil 100, that is, in the region surrounded by the coil 100 in the same manner as the first magnetic portion 210 shown in FIGS. is applicable.

(Embodiment 4)
FIG. 20 is a cross-sectional view showing the vibration power generator 10 according to the fourth embodiment, and corresponds to FIG. 19 of the third embodiment. The vibration power generator 10 according to this embodiment is the same as the vibration power generator 10 according to the third embodiment except for the following points.

The coil 100 has m-phase coils (m is a positive integer) connected in parallel. In the example shown in FIG. 20, the coil 100 has a 3-phase coil. The first region 102 of the coil 100 includes a first portion 102a, a second portion 102b, and a third portion 102c in order along the movement direction (Z direction) of the coil 100 or the magnetic portion 200. As shown in FIG. The second region 104 includes a first portion 104a, a second portion 104b, and a third portion 104c in order along the movement direction (Z direction). A first coil of the three-phase coil has a first portion 102a of the first region 102 and a first portion 102a of the second region 104, and a second coil of the three-phase coil has the first region 102a. 102 and a second portion 104b of the second region 104, and the third coil of the three-phase coil is the third portion 102c of the first region 102 and the third region 104b of the second region 104. It has a portion 104c.

In the example shown in FIG. 20 as well, power generation by vibration can be performed in the same manner as in the example shown in FIG. Furthermore, according to the example shown in FIG. 20, an induced electromotive force can be obtained from each of the m-phase coils.

(Embodiment 5)
FIG. 21 is a cross-sectional view showing the vibration power generator 10 according to the fifth embodiment, and corresponds to FIG. 19 of the third embodiment. The vibration power generator 10 according to this embodiment is the same as the vibration power generator 10 according to the third embodiment except for the following points.

The magnetic section 200 includes a third magnetic section 230 and a fourth magnetic section 240 . The third magnetic section 230 has a fifth portion 232 and a sixth portion 234 . The fifth portion 232 is the first polarity (South pole). The sixth portion 234 is of the second polarity (north pole). The third magnetic portion 230 is magnetized from one of the fifth portion 232 and the sixth portion 234 to the other. The fourth magnetic section 240 has a seventh portion 242 and an eighth portion 244 . The seventh portion 242 is of the second polarity (north pole). The eighth portion 244 is the first polarity (South pole). The fourth magnetic portion 240 is magnetized from one of the seventh portion 242 and the eighth portion 244 to the other. The fifth portion 232 and the sixth portion 234 of the third magnetic portion 230 are arranged in the axial direction (Z direction) of the coil 100 . The seventh portion 242 and the eighth portion 244 of the fourth magnetic portion 240 are arranged in the axial direction (Z direction) of the coil 100 . The third magnetic portion 230 is arranged side by side with the first magnetic portion 210 on the opposite side of the second magnetic portion 220 in the axial direction (Z direction) of the coil 100 . The fourth magnetic portion 240 is arranged side by side with the second magnetic portion 220 on the opposite side of the first magnetic portion 210 in the axial direction (Z direction) of the coil 100 .

According to the configuration described above, the third magnetic section 230 and the fourth magnetic section 240 can be used to vibrate the first magnetic section 210 and the second magnetic section 220 in one direction (the Z direction). Specifically, magnets (not shown) that repel the third magnetic part 230 and the fourth magnetic part 240 are placed at both ends of the path through which the first magnetic part 210 and the second magnetic part 220 pass due to vibration. is provided. When the first magnetic part 210 and the second magnetic part 220 vibrate in one direction (the Z direction), the third magnetic part 230 and the fourth magnetic part 240 receive repulsive force from the magnets.

In the example shown in FIG. 21, the first portion 212 of the first magnetic portion 210 is positioned closer to the coil 100 than the second portion 214 of the first magnetic portion 210 is. The third portion 222 of the second magnetic portion 220 is located closer to the coil 100 than the fourth portion 224 of the second magnetic portion 220 is. The fifth portion 232 of the third magnetic portion 230 is located closer to the first magnetic portion 210 than the sixth portion 234 of the third magnetic portion 230 is. The seventh portion 242 of the fourth magnetic portion 240 is positioned closer to the second magnetic portion 220 than the eighth portion 244 of the fourth magnetic portion 240 is.

According to the above-described configuration, the same polarity (S pole) region from the first portion 212 of the first magnetic portion 210 to the fifth portion 232 of the third magnetic portion 230 can be opposed to the coil 100, and the second magnetism A region of the same polarity (N pole) from the third portion 222 of the portion 220 to the seventh portion 242 of the fourth magnetic portion 240 can face the coil 100 . Therefore, the coil 100 can receive the magnetic field generated by the region from the first portion 212 of the first magnetic portion 210 to the fifth portion 232 of the third magnetic portion 230, and the third portion 222 of the second magnetic portion 220 can receive the magnetic field. to the seventh portion 242 of the fourth magnetic portion 240 can receive the magnetic field generated by the region.

In the example shown in FIG. 21, the third magnetic section 230 is a permanent magnet. The third magnetic portion 230 is magnetized in the moving direction (Z direction) of the coil 100 or the magnetic portion 200 . By magnetization, the third magnetic portion 230 (permanent magnet) has an S pole (fifth portion 232) and an N pole (sixth portion 234).

In the example shown in FIG. 21, the fourth magnetic part 240 is a permanent magnet. The fourth magnetic portion 240 is magnetized in the moving direction (Z direction) of the coil 100 or the magnetic portion 200 . By magnetization, the fourth magnetic portion 240 (permanent magnet) has an N pole (seventh portion 242) and an S pole (eighth portion 244).

In the example shown in FIG. 21, in the axial direction (Z direction) of the coil 100, the first region 102 and the second region 104 have lengths L1 and L2, respectively. In one direction (Z direction), the first magnetic portion 210 and the third magnetic portion 230 have a length L3 from the boundary between the first portion 212 and the third portion 222 to the boundary between the fifth portion 232 and the sixth portion 234. is doing. In the axial direction (Z direction) of the coil 100, the second magnetic portion 220 and the fourth magnetic portion 240 extend from the boundary between the first portion 212 and the third portion 222 to the boundary between the seventh portion 242 and the eighth portion 244. has L4.

The boundary between the fifth portion 232 and the sixth portion 234 is located substantially at the center of the third magnetic portion 230 in one direction (Z direction). The boundary between the seventh portion 242 and the eighth portion 244 is located substantially at the center of the fourth magnetic portion 240 in one direction (Z direction).

The length L1 of the first region 102 may be substantially equal to the length L3 for the first magnetic portion 210 and the third magnetic portion 230 . In this case, the magnetic field received by the first region 102 from the first magnetic portion 210 and the third magnetic portion 230 can be substantially maximized for the same reason as explained with reference to FIG. time can be almost minimized.

Similarly, length L1 of first region 102 may be substantially equal to length L4 for second magnetic portion 220 and fourth magnetic portion 240 . Similarly, length L2 of second region 104 may be substantially equal to length L3 for first magnetic portion 210 and third magnetic portion 230 . Similarly, length L2 of second region 104 may be substantially equal to length L4 for second magnetic portion 220 and fourth magnetic portion 240 .

22 is a diagram showing a modification of FIG. 21. FIG.

As shown in FIG. 22, the sixth portion 234 (N pole) of the third magnetic portion 230 is located closer to the first magnetic portion 210 than the fifth portion 232 (S pole) of the third magnetic portion 230. The eighth portion 244 (S pole) of the fourth magnetic portion 240 is located closer to the second magnetic portion 220 than the seventh portion 242 (N pole) of the fourth magnetic portion 240. good too. In the example shown in FIG. 22, similarly to the example shown in FIG. direction).

(Embodiment 6)
FIG. 23 is a cross-sectional view showing the vibration power generator 10 according to the sixth embodiment, and corresponds to FIG. 19 of the third embodiment. The vibration power generator 10 according to this embodiment is the same as the vibration power generator 10 according to the third embodiment except for the following points.

The magnetic section 200 includes a magnetic section 250 . The magnetic portion 250 has portions 252 and 254 . Portion 252 is the first polarity (South pole). Portion 254 is of the second polarity (north pole). Magnetic portion 250 is magnetized from one of portion 252 and portion 254 to the other. The magnetic portion 250 is positioned between the first magnetic portion 210 and the second magnetic portion 220 in the axial direction (Z direction) of the coil 100 . The portions 252 and 254 of the magnetic portion 250 are arranged in the axial direction (Z direction) of the coil 100 .

The first portion 212 (S pole) of the first magnetic portion 210 is positioned closer to the coil 100 than the second portion 214 (N pole) of the first magnetic portion 210 is. The third portion 222 (N pole) of the second magnetic portion 220 is positioned closer to the coil 100 than the fourth portion 224 (S pole) of the second magnetic portion 220 is. A portion 252 of the magnetic portion 250 is positioned closer to the first magnetic portion 210 than a portion 254 of the magnetic portion 250 . Portion 254 of magnetic portion 250 is located closer to second magnetic portion 220 than portion 252 of magnetic portion 250 .

According to the configuration described above, the first magnetic portion 210, the second magnetic portion 220, and the magnetic portion 250 can form a Halbach array. Therefore, the magnetic lines of force at the coil 100 side end of the first portion 212 can be concentrated, and the magnetic force lines at the coil 100 side end of the third portion 222 can be concentrated.

In the example shown in FIG. 23, the magnetic portion 250 is a permanent magnet. The magnetic portion 250 is magnetized in the moving direction (Z direction) of the coil 100 or the magnetic portion 200 . Due to the magnetization, the magnetic portion 250 (permanent magnet) has an S pole (portion 252) and an N pole (portion 254).

(Embodiment 7)
FIG. 24 is a diagram for explaining a first example of the first magnetic part 210 according to the seventh embodiment.

The first magnetic part 210 has a tubular shape having an inner circumference and an outer circumference. The first magnetic portion 210 is magnetized in a direction crossing the inner circumference or the outer circumference of the first magnetic portion 210 . By magnetization, the first magnetic portion 210 has an S pole (first portion 212) and an N pole (second portion 214). The first portion 212 is located closer to the inner circumference of the first magnetic portion 210 than the second portion 214, and the second portion 214 is closer to the outer circumference of the first magnetic portion 210 than the first portion 212. Located nearby. The first portion 212 and the second portion 214 are positioned over the entire inner and outer circumferences of the first magnetic portion 210 .

FIG. 25 is a diagram for explaining a second example of the first magnetic part 210 according to the seventh embodiment. The example shown in FIG. 25 is similar to the example shown in FIG. 24, except for the following points.

The first magnetic portion 210 has a plurality of first portions 212 along the inner periphery of the first magnetic portion 210 in the circumferential direction, and a plurality of second portions 212 along the outer periphery of the first magnetic portion 210 in the circumferential direction. It has a portion 214 . The plurality of first portions 212 can be arranged at substantially equal intervals along the circumferential direction of the inner circumference of the first magnetic portion 210 , and the plurality of second portions 214 can be arranged along the outer circumference of the first magnetic portion 210 . They can be substantially evenly spaced along a direction. In the example shown in FIG. 25 , three first portions 212 are arranged substantially at equal intervals along the circumferential direction of the inner circumference of the first magnetic portion 210 , and three second portions 214 are arranged along the inner circumference of the first magnetic portion 210 . are arranged at substantially equal intervals along the circumferential direction of the outer periphery of the .

FIG. 26 is a diagram for explaining a third example of the first magnetic part 210 according to the seventh embodiment. The example shown in FIG. 26 is similar to the example shown in FIG. 24, except for the following points.

In the example shown in FIG. 26 , the multiple first magnetic parts 210 are arranged so as to define a region surrounded by the multiple first magnetic parts 210 . The plurality of first magnetic portions 210 are arranged such that the first portion 212 of each first magnetic portion 210 faces the inside of the region and the second portion 214 of each first magnetic portion 210 faces the outside of the region. ing. Therefore, also in the example shown in FIG. 26, a magnetic field similar to that of the first magnetic section 210 shown in FIG. 24 or 25 can be generated. The plurality of first magnetic parts 210 can be arranged at substantially equal intervals along the outer circumference of the region. In the example shown in FIG. 26, eight first magnetic portions 210 are arranged substantially at regular intervals along the outer periphery of the region.

According to the example shown in FIG. 26, each first magnetic portion 210 can be a permanent magnet having a regular shape (eg, rectangular parallelepiped). In general, a complicated technique is required to magnetize the first magnetic portion 210 in a direction intersecting the inner circumference or the outer circumference of the first magnetic portion 210 as shown in FIG. 24 or 25 . On the other hand, each first magnetic part 210 shown in FIG. 26 can be manufactured without using such a complicated technique. Therefore, according to the example shown in FIG. 26, a magnetic field can be easily generated.

FIG. 27 is a diagram for explaining a holding member 500 for holding the plurality of first magnetic portions 210 shown in FIG. 26. As shown in FIG.

The holding member 500 is cylindrical and has an inner wall 510 . A plurality of recesses 512 are formed in the inner wall 510 .

28A and 28B are diagrams for explaining a method of holding the plurality of first magnetic portions 210 in the holding member 500 shown in FIG. 29 is a cross-sectional view taken along the line BB' of FIG. 28. FIG. 28 does not show the third magnetic part 230 shown in FIG. 29 for the sake of explanation.

As shown in FIG. 28 , each of the plurality of first magnetic portions 210 is inserted into each of the plurality of recesses 512 of the holding member 500 . Retaining member 500 may comprise a ferromagnetic material. In this case, each first magnetic part 210 can be fixed to the holding member 500 by magnetic force.

In the example shown in FIG. 28 , the depth of the concave portion 512 is shallower than the thickness of the first magnetic portion 210 . Therefore, the first magnetic portion 210 can be brought closer to the inner region of the holding member 500 than the inner wall 510 of the holding member 500 .

As shown in FIG. 29 , the holding member 500 holds the first magnetic portion 210 (permanent magnet 200 a ) and the second magnetic portion 220 (permanent magnet 200 b ). The inner wall 510 of the holding member 500 covers part of the first magnetic part 210 , the second magnetic part 220 , the third magnetic part 230 and part of the fourth magnetic part 240 .

An oscillating power generator 10 shown in FIG. 21 was produced. The length L1 and the length L2 were set to 12.5 mm. The length L3 and the length L4 were set to 12.25 mm. That is, the length L1 and the length L2 are 1.02 times the length L3 and the length L2, and are substantially equal to the length L3 and the length L2.

FIG. 30 is a graph showing results of the electromotive force generated by the vibration power generator 10 according to the example. The horizontal axis of the graph of FIG. 30 indicates time, and the vertical axis of the graph of FIG. 30 indicates voltage.

In FIG. 30, "region 1" means the voltage obtained from the first region 102 in the first stage from the top of the coil 100 in FIG. means the voltage obtained from the second area 104 on the second stage from the top, and "area 3" means the voltage obtained from the first area 102 on the third stage from the top of the coil 100 in FIG. 21, and "region 4" means the voltage obtained from the second region 104 in the fourth stage from the top of the coil 100 of FIG.

As shown in FIG. 30, it can be said that the respective voltages from region 1 to region 4 are substantially synchronized. Therefore, according to this embodiment, it can be said that mutually synchronized voltages can be obtained from the respective regions (the first region 102 and the second region 104) of the coil 100. FIG.

Although the embodiments of the present invention have been described above with reference to the drawings, these are examples of the present invention, and various configurations other than those described above can also be adopted.
Examples of reference forms are added below.
1. a coil having an axial direction and wound around the axial direction;
a first portion proximate the coil and having a first portion of a first polarity and a second portion of a second polarity opposite the first polarity, from one of the first portion and the second portion a first magnetic portion magnetized across the other;
with
one of the coil and the first magnetic portion is movable along the axial direction of the coil with respect to the other of the coil and the first magnetic portion;
The first part and the second part of the first magnetic part are arranged in a row in a direction crossing the axial direction of the coil.
2. 1. In the vibration power generator according to
with a yoke,
The first magnetic portion is located in one of a region surrounded by the coil and a region surrounding the coil,
The yoke is located in the other of the area surrounded by the coil and the area surrounding the coil.
3. 1. or 2. In the vibration power generator according to
a third portion of the second polarity and a fourth portion of the first polarity located near the coil and magnetized from one of the third portion and the fourth portion to the other; a second magnetic portion including
the third portion and the fourth portion of the second magnetic portion are arranged in a direction intersecting the axial direction of the coil;
The coil is connected in series with a first region capable of generating an electromotive force in one direction due to a change in magnetic flux, and in a direction opposite to the first region due to a change in the same magnetic flux as the change in the magnetic flux. and a second region capable of generating an electromotive force in
the first portion of the first magnetic portion and the third portion of the second magnetic portion are arranged in the axial direction of the coil;
the second portion of the first magnetic portion and the fourth portion of the second magnetic portion are arranged in the axial direction of the coil;
The first region and the second region of the coil are arranged in the axial direction of the coil.
4. 3. In the vibration power generator according to
In the axial direction of the coil, the length of the first region is substantially equal to the length of the first magnetic portion and the length of the second magnetic portion, and
The oscillating power generator, wherein the length of the second region in the axial direction of the coil is substantially equal to the length of the first magnetic portion and the length of the second magnetic portion.
5. 3. In the vibration power generator according to
a third magnetic portion having a fifth portion of the first polarity and a sixth portion of the second polarity, and being magnetized from one to the other of the fifth portion and the sixth portion;
a fourth magnetic portion having a seventh portion of the second polarity and an eighth portion of the first polarity, the fourth magnetic portion being magnetized from one to the other of the seventh portion and the eighth portion;
with
the fifth portion and the sixth portion of the third magnetic portion are arranged in the axial direction of the coil;
The seventh portion and the eighth portion of the fourth magnetic portion are arranged in the axial direction of the coil,
The third magnetic portion is arranged in line with the first magnetic portion on the opposite side of the second magnetic portion in the axial direction of the coil,
The oscillating power generator, wherein the fourth magnetic section is arranged side by side with the second magnetic section on the opposite side of the first magnetic section in the axial direction of the coil.
6. 5. In the vibration power generator according to
the first portion of the first magnetic portion is positioned closer to the coil than the second portion of the first magnetic portion;
the third portion of the second magnetic portion is positioned closer to the coil than the fourth portion of the second magnetic portion;
the fifth portion of the third magnetic portion is located closer to the first magnetic portion than the sixth portion of the third magnetic portion;
The oscillating power generator, wherein the seventh portion of the fourth magnetic portion is positioned closer to the second magnetic portion than the eighth portion of the fourth magnetic portion.
7. 6. In the vibration power generator according to
In the axial direction of the coil, the length of the first region is the length from the boundary between the first portion and the third portion to the boundary between the fifth portion and the sixth portion. is substantially equal to each length from the boundary of the third portion to the boundary of the seventh portion and the eighth portion;
In the axial direction of the coil, the length of the second region is the length from the boundary between the first portion and the third portion to the boundary between the fifth portion and the sixth portion. An oscillating power generator substantially equal to each of the lengths from the boundary of the third portion to the boundary of the seventh portion and the eighth portion.

10 vibration generator 100 coil 100a coil 100b coil 102 first region 102a first portion 102b second portion 102c third portion 104 second region 104a first portion 104b second portion 104c third portion 110 group 200 magnetic portion 200a permanent magnet 200b Permanent magnet 210 First magnetic part 212 First part 214 Second part 220 Second magnetic part 222 Third part 224 Fourth part 230 Third magnetic part 232 Fifth part 234 Sixth part 240 Fourth magnetic part 242 Seventh Part 244 Eighth part 250 Magnetic part 252 Part 254 Part 300 Yoke 300a Yoke 300b Yoke 400 Shaft 500 Holding member 510 Inner wall 512 Recess

Claims (6)

a coil having an axial direction and wound around the axial direction;
a magnetic portion located in one of the area surrounding the coil and the area surrounded by the coil;
with
one of the coil and the magnetic portion is movable along the axial direction of the coil with respect to the other of the coil and the magnetic portion;
The coil is
a first region capable of generating an electromotive force in one direction due to changes in magnetic flux;
a second region connected in series with the first region and capable of generating an electromotive force in a direction opposite to that of the first region by the same magnetic flux change as the magnetic flux change;
has
The magnetic part is
a first portion of a first polarity and a second portion of a second polarity opposite to the first polarity aligned with the first portion in a direction crossing the axial direction of the coil; a first magnetic portion magnetized from one of the first portion and the second portion to the other;
a third portion of the second polarity aligned with the first portion of the first magnetic portion in the axial direction of the coil; and a fourth portion of the first polarity aligned with the second portion of the first magnetic portion in the axial direction of the coil, and magnetized from one of the third portion and the fourth portion to the other. a second magnetic part,
has
The length of the first region in the axial direction of the coil is either the length of the first magnetic portion in the axial direction of the coil or the length of the second magnetic portion in the axial direction of the coil. is equal to
The length of the second region in the axial direction of the coil is either the length of the first magnetic portion in the axial direction of the coil or the length of the second magnetic portion in the axial direction of the coil. Vibration generator that is also equal to. The vibration power generator of claim 1,
with a yoke,
The yoke is located in the other of the area surrounded by the coil and the area surrounding the coil. a coil having an axial direction and wound around the axial direction;
a magnetic portion located in one of the area surrounding the coil and the area surrounded by the coil;
with
one of the coil and the magnetic portion is movable along the axial direction of the coil with respect to the other of the coil and the magnetic portion;
The magnetic part is
a first portion of a first polarity and a second portion of a second polarity opposite to the first polarity aligned with the first portion in a direction crossing the axial direction of the coil; a first magnetic portion magnetized from one of the first portion and the second portion to the other;
a third portion of the second polarity aligned with the first portion of the first magnetic portion in the axial direction of the coil; and a fourth portion of the first polarity aligned with the second portion of the first magnetic portion in the axial direction of the coil, and magnetized from one of the third portion and the fourth portion to the other. a second magnetic part,
It is positioned on the side opposite to the side on which the second magnetic part is positioned with respect to the first magnetic part, and both the first part and the second part of the first magnetic part are arranged in the axial direction of the coil. a fifth portion of one of the first polarity and the second polarity arranged side by side; a third magnetic portion having a polarity opposite to the polarity of the fifth portion and being aligned with the fifth portion, the third magnetic portion being magnetized from one to the other of the fifth portion and the sixth portion; ,
It is positioned on the side opposite to the side on which the first magnetic part is positioned with respect to the second magnetic part, and both the third part and the fourth part of the second magnetic part in the axial direction of the coil. A seventh portion that is aligned and has a polarity opposite to that of the fifth portion, and a magnetic field that extends in the axial direction of the coil and is located on the side opposite to the side on which the second magnetic portion is located with respect to the seventh portion. a fourth magnetic portion having a polarity opposite to the polarity of the seventh portion and being aligned with the seventh portion, the fourth magnetic portion being magnetized from one to the other of the seventh portion and the eighth portion; When,
Vibration generator with In the vibration power generator of claim 3,
with a yoke,
The yoke is located in the other of the area surrounded by the coil and the area surrounding the coil. In the vibration power generator according to claim 3 or 4,
the first portion of the first magnetic portion is positioned closer to the coil than the second portion of the first magnetic portion;
the third portion of the second magnetic portion is positioned closer to the coil than the fourth portion of the second magnetic portion;
the fifth portion of the third magnetic portion is located closer to the first magnetic portion than the sixth portion of the third magnetic portion;
The oscillating power generator, wherein the seventh portion of the fourth magnetic portion is positioned closer to the second magnetic portion than the eighth portion of the fourth magnetic portion. In the vibration power generator according to any one of claims 3 to 5,
The coil is
a first region capable of generating an electromotive force in one direction due to changes in magnetic flux;
a second region connected in series with the first region and capable of generating an electromotive force in a direction opposite to that of the first region by the same magnetic flux change as the magnetic flux change;
has
The length of the first region in the axial direction of the coil is the length from the boundary between the first portion and the third portion to the boundary between the fifth portion and the sixth portion in the axial direction of the coil. , the length from the boundary between the first portion and the third portion to the boundary between the seventh portion and the eighth portion in the axial direction of the coil , and
The length of the second region in the axial direction of the coil is the length from the boundary between the first portion and the third portion to the boundary between the fifth portion and the sixth portion in the axial direction of the coil. , the length from the boundary between the first portion and the third portion to the boundary between the seventh portion and the eighth portion in the axial direction of the coil.

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