TWI583587B - Bicycle generator - Google Patents

Description

Bicycle generator

The present invention relates to a bicycle generator.

A bicycle generator that generates electric power for driving an electric component such as a headlight has been proposed (see Patent Document 1). This bicycle generator uses the rotation of the rotating portion of the bicycle, for example, the rotation of the wheel to generate electric power.

[Practical Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2013-159242

In order to generate higher electric power or to reduce the size of the bicycle generator, the bicycle generator is expected to generate electric power more efficiently.

The problem of the present invention is to provide an efficient living A bicycle generator for electric power.

The bicycle generator according to the present invention is a bicycle generator that generates electric power in accordance with the rotation generated by the rotating portion of the bicycle. The bicycle generator includes a first member, a second member, a third member, and a coil member. The first member has the first magnetic pole group. The first magnetic pole group includes a plurality of magnetic poles that are alternately arranged in the circumferential direction. Moreover, the first member is rotatable around the central axis. The second member has the second magnetic pole group. The second magnetic pole group includes a plurality of magnetic poles that are alternately arranged in the circumferential direction. The number of magnetic poles of the second magnetic pole group is larger than the number of magnetic poles of the first magnetic pole group. The third member has a plurality of magnetic bodies. Each of the magnetic bodies is disposed at a distance from each other in the circumferential direction. The third member is disposed between the first member and the second member in the radial direction. The coil member is configured to flow an induced current by the rotation of the first member. The second member and the third member are configured to rotate relative to each other around the central axis by the rotation of the rotating portion.

Since the bicycle generator of the present invention is configured as described above, the first member can rotate faster than the rotational speed of the rotating portion of the bicycle. As a result, the bicycle generator can efficiently generate electric power.

Preferably, each of the magnetic bodies is disposed between the first magnetic pole group and the second magnetic pole group in the radial direction.

Preferably, the number of magnetic bodies is such that when the number of magnetic poles in the first magnetic pole group is N ₁ and the number of magnetic poles in the second magnetic pole group is N ₂ , N ₃ = N ₂ /2 ± N ₁ / The integer N ₃ represented by ₂ . According to this configuration, the first rotating member can be surely rotated at a faster rotation speed than the rotating portion of the bicycle.

Preferably, one of the second member and the third member is rotatable around the central axis by the rotation of the rotating portion. Further, the other of the second member and the third member is non-rotatable around the central axis. According to this configuration, the second member and the third member do not rotate together, but one of the second member and the third member rotates. As a result, the number of rotating members can be reduced, and further, the durability of the bicycle generator can be improved.

Preferably, the third member has a yoke portion including a plurality of claw portions. Each of the claw portions extends in a direction along the central axis. Each of the claws includes a magnetic body. According to this configuration, since the first member that rotates at a high speed faces the yoke portion, electric power can be generated more efficiently.

Preferably, the coil member is disposed outside the axial direction of the first member at intervals. The yoke has at least one first yoke and at least one second yoke. The first and second yoke portions are alternately arranged in the circumferential direction. The first yoke includes a plurality of first claw portions, a plurality of first base portions, and a plurality of first coupling portions. Each of the first claw portions extends in the axial direction between the first member and the second member. Each of the first base portions is disposed on the inner side in the radial direction of the coil member. Each of the first connecting portions is disposed outside the coil member in the axial direction. Each of the first connecting portions connects each of the first claw portions and each of the first base portions. The second yoke includes a plurality of second claw portions, a plurality of second base portions, and a plurality of second coupling portions. Second claw The portion extends in the axial direction between the first member and the second member. Each of the second base portions is disposed on the inner side in the radial direction of the coil member. Each of the second connecting portions is disposed between the coil member and the first member in the axial direction. Each of the second connecting portions connects the second claw portion and the second base portion.

Preferably, the yoke has at least one first yoke and at least one second yoke. At least one of the first yoke portions includes a plurality of first claw portions that extend in the first direction along the central axis. At least one of the second yoke portions includes a plurality of second claw portions that extend in the second direction along the central axis. Further, the second direction is the opposite direction of the first direction. Each of the first yoke portions and each of the second yoke portions is alternately arranged in the circumferential direction.

Preferably, each of the first yoke portions and each of the second yoke portions are alternately disposed adjacent to each other without interference in the circumferential direction.

Preferably, the total number N ₃ of the first claw portion and the second claw portion is the number of the second claw portions of the first claw portion and each of the second yoke portions of each of the first yoke portions. When n is set to N ₁ in the number of magnetic poles in the first magnetic pole group, N ₃ = nN ₁ .

Preferably, each of the claw portions is disposed at equal intervals in the circumferential direction.

Preferably, the coil member is disposed in parallel with the first member or the second member disposed inside the respective magnetic bodies in the axial direction. According to this configuration, the size of the bicycle generator in the radial direction can be reduced.

Preferably, the coil member faces the both ends of the first member or the second member disposed in the axial direction inside the respective magnetic members. Ground configuration.

Preferably, each of the magnetic bodies is disposed on the outer side in the radial direction of the first magnetic pole group and on the inner side in the radial direction of the second magnetic pole group. According to this configuration, since the second magnetic pole group is disposed outside the first magnetic pole group in the radial direction, the space for arranging the magnetic poles of the second magnetic pole group is large. Therefore, the second magnetic pole group can easily arrange more magnetic poles than the first magnetic pole group. This result can increase the speed increase ratio.

Preferably, the second member is rotatable about the central axis by the rotation of the rotating portion, and the third member is non-rotatable around the central axis.

Preferably, the second member is non-rotatable about the central axis. Further, the third member is rotatable around the central axis by the rotation of the rotating portion.

Preferably, the second member is non-rotatable about the central axis. The third member is rotatable around the central axis by the rotation of the rotating portion. N ₁ and N ₂ are set such that the absolute value of N ₃ /(N ₁ /2) is larger than 1. According to this configuration, the first member can be rotated by a rotation speed that is surely faster than that of the third member.

Preferably, the second member has a yoke portion and a plurality of magnets. The yoke portion includes a plurality of claw portions that extend in a direction along the central axis. Each of the magnets is disposed between the plurality of claw portions in the circumferential direction. The second magnetic pole group is composed of a plurality of claw portions and a plurality of magnets. Thus, by arranging the magnets between the respective claw portions, the size of the second member can be reduced. Moreover, by arranging the magnets between the respective claw portions, each of the claw portions can be made It is a magnetic pole function.

Preferably, the yoke includes a first yoke and a second yoke. The first yoke portion includes a plurality of first claw portions. Each of the first claw portions extends in a first direction along the central axis. The second yoke includes a plurality of second claws. Each of the second claw portions extends in a second direction that is opposite to the first direction and along the central axis. Each of the magnets is disposed between each of the first claw portions and each of the second claw portions in the circumferential direction. The second magnetic pole group is composed of a plurality of first claw portions, a plurality of second claw portions, and a plurality of magnets.

Preferably, the number of magnetic poles of the first magnetic pole group is the same as the number of the plurality of claw portions. According to this configuration, electric power can be generated more efficiently.

Preferably, the coil member is wound around the central axis.

Preferably, the second magnetic pole group is disposed outside the coil member in the radial direction. The magnetic body is disposed on the outer side in the radial direction of the second magnetic pole group. The first magnetic pole group is disposed on the outer side of the magnetic body in the radial direction.

Preferably, the bicycle generator further includes a support member that supports each of the magnetic bodies. The support member is rotatable around the central axis by the rotating portion of the bicycle.

Preferably, the support member is composed of a first support member and a second support member. The first support member and the second support member are disposed at intervals in the axial direction, and support both end portions of the respective magnetic bodies.

Preferably, the support member is made of a non-magnetic material.

Preferably, the bicycle generator further includes a bearing member. The bearing member is disposed between the first member and the support member, and the first member is rotatably supported by the support member.

Preferably, the rotating portion is the wheel of the bicycle. The support member is constructed by connecting the spokes of the wheel.

The bicycle generator may further include a cover member. The cover member is disposed on the outer side in the radial direction of the first member, and is disposed at intervals in the first member. According to this configuration, the first member can be covered by the cover member.

The cover member may be coupled to the support member by both end portions in the axial direction.

The rotating portion may be a crankshaft of a bicycle. In this case, the support member is coupled to the crankshaft.

The bicycle generator of the present invention can efficiently generate electric power.

1‧‧‧1st component

2‧‧‧2nd member

3‧‧‧3rd component

4‧‧‧ coil components

5‧‧·Wheel axle

6‧‧‧Support members

6a‧‧‧1st support member

6b‧‧‧2nd support member

7a‧‧‧1st bearing component

7b‧‧‧2nd bearing component

7c‧‧‧3rd bearing component

7d‧‧‧4th bearing component

7e‧‧‧5th bearing component

8‧‧‧Caps

9‧‧‧ Positioning members

10‧‧‧Bicycle generator

11‧‧‧Shell Department

12‧‧‧ magnetic pole

13‧‧‧Caps

14‧‧‧3rd support member

22‧‧‧ yoke

22a‧‧‧1st yoke

22b‧‧‧2nd yoke

23‧‧‧ Magnet

24‧‧‧4th support member

31‧‧‧ magnetic body

31a‧‧1 yoke

31b‧‧‧2nd yoke

41‧‧‧ Small Trails Department

42‧‧‧The Great Trails Department

51‧‧‧ center axis

52‧‧‧ shoulder

61‧‧‧Cylinder

61a‧‧‧1st cylindrical part

61b‧‧‧2nd cylindrical part

62a‧‧‧1st flange

62b‧‧‧2nd flange

101‧‧‧Bicycle

102‧‧‧ frame

102a‧‧‧Bottom bracket hanger

103‧‧‧ front wheel

104‧‧‧ Rear wheel

105‧‧‧Chain

106‧‧‧ pedal

107‧‧‧ crankshaft

107a‧‧‧ crankshaft

107b‧‧‧ crank arm

107c‧‧‧central axis

108‧‧‧ Front fork

109‧‧‧ spokes

110‧‧‧ headlights

111‧‧‧Connector

220‧‧‧ yoke

220a‧‧‧1st yoke

220b‧‧‧2nd yoke

221‧‧‧ claws

221a‧‧‧1st claw

221b‧‧‧2nd claw

222‧‧‧Base section

222a‧‧‧1st base section

222b‧‧‧2nd base section

223‧‧‧Connecting Department

223a‧‧‧1st link

223b‧‧‧2nd link

310a‧‧‧1st yoke

310b‧‧‧2nd yoke

311a‧‧‧1st claw

311b‧‧‧2nd claw

312a‧‧‧1st base section

312b‧‧‧2nd base section

313a‧‧1st link

313b‧‧‧2nd link

611‧‧‧Ditch Department

611a‧‧‧1st ditch

611b‧‧‧2nd ditch

621a‧‧‧1st wire hole

621b‧‧‧2nd wire hole

622‧‧‧ openings

3111a‧‧‧ base end

3111b‧‧‧ base end

3121a‧‧‧ base end

3121b‧‧‧ base end

3122a‧‧‧ apex

3122b‧‧‧ apex

[Fig. 1] A side view of a bicycle according to a first embodiment.

[Fig. 2] A front view of the bicycle generator of the first embodiment.

[Fig. 3] A cross-sectional view taken along line A-A of Fig. 2.

Fig. 4 is a perspective view of a second member of the first embodiment.

[Fig. 5] A front view of the yoke of the first embodiment.

[Fig. 6] An exploded view of Fig. 4.

[Fig. 7] A cross-sectional perspective view of the first member, the third member, and the support member of the first embodiment.

Fig. 8 is a perspective view of the first member of the first embodiment.

[Fig. 9] A cross-sectional view taken along line B-B of Fig. 2;

[Fig. 10] A perspective view of a bicycle generator according to a second embodiment.

[Fig. 11] Fig. 11 is a schematic cross-sectional view showing a bicycle generator according to a second embodiment.

[12] Fig. 12 is a schematic cross-sectional view showing a bicycle generator according to a second embodiment.

[Fig. 13] Fig. 13 is a schematic cross-sectional view showing a bicycle generator according to a second embodiment.

Fig. 14 is a schematic cross-sectional view showing a bicycle generator according to a second embodiment.

Fig. 15 is a schematic cross-sectional view showing a bicycle generator according to a second embodiment.

[Fig. 16] A schematic view of a bicycle generator according to a second modification.

Fig. 17 is a cross-sectional view showing a bicycle generator according to a fourth modification.

[18] A cross-sectional perspective view of a support member according to Modification 5.

19 is a cross-sectional view of a bicycle generator according to a seventh modification.

[20] Fig. 20 is a perspective view of a bicycle generator according to a seventh modification.

[First Embodiment]

Hereinafter, the first embodiment of the bicycle generator of the present invention will be described with reference to the drawings. Fig. 1 is a side view of a bicycle 101 in which a bicycle generator 10 is mounted. As shown in Fig. 1, the bicycle 101 includes a frame 102, a front wheel 103, a rear wheel 104, and a bicycle generator 10. Further, the bicycle 101 further includes a chain 105 and a crankshaft 107 on which the pedal 106 is mounted. Further, the crankshaft 107 includes a crankshaft 107a and a pair of crank arms 107b. Each of the crank arm arms 107b is provided at both end portions of the crankshaft 107a.

Fig. 2 is a front view of the bicycle generator 10. As shown in Fig. 2, the bicycle generator 10 is a pair of front forks 108 attached to a bicycle, and generates electricity according to rotation generated by the front wheel 103 (an example of a rotating portion) of a bicycle wheel. Motor.

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2; As shown in FIG. 3, the bicycle generator 10 includes a first member 1, a second member 2, a third member 3, and a coil member 4. These members are arranged in this order from the inner side in the radial direction by the coil member 4, the second member 2, the third member 3, and the first member 1. Further, the bicycle generator 10 further includes a hub axle 5 and a support member 6. The central axis 51 of the hub axle 5 corresponds to the central axis of the present invention. In addition, in the following description, the radial direction means the radial direction of the circle centering on the central axis 51. Further, the circumferential direction means the circumferential direction of a circle centered on the central axis 51. Further, the axial direction is the direction in which the central axis 51 extends.

As shown in Fig. 2, the hub axle 5 extends across a pair of front forks 108. The hub axle 5 is hollow (refer to Fig. 3). The hub axle 5 is fixed to the front fork 108 by a quick release mechanism (not shown). A connector 111 is attached to the first end portion (the left end portion of the second drawing) of the hub axle 5. The connector 111 is a member for supplying electric power from the coil member 4 to an electric component such as the headlight 110.

As shown in Fig. 3, the second member 2 is attached to the hub axle 5 so as not to be rotatable. That is, the second member 2 is not rotatable around the central axis 51. The second member 2 has a second magnetic pole group including a plurality of magnetic poles. Hereinafter, the details of the second member 2 will be described.

Fig. 4 is a perspective view showing the second member 2 attached to the hub axle 5. As shown in FIG. 4, the second member 2 has a yoke 22 and a plurality of magnets 23. The yoke portion 22 includes a plurality of claw portions 221 that extend in a direction along the central axis 51. Each of the claw portions 221 is disposed at intervals in the circumferential direction.

Each of the magnets 23 is disposed between the respective claw portions 221 . Each of the magnets 23 extends in a direction along the central axis 51. Among the magnets 23, one magnetic pole is disposed on the outer side in the radial direction, and the other magnetic pole is disposed on the inner side in the radial direction. Further, in each of the magnets 23, the directions of the magnetic poles are the same.

For example, in each of the magnets 23, the N poles are arranged outward in the radial direction, and the S poles are arranged inward in the radial direction. In this case, each of the claw portions 221 is magnetized so that the outer surface of each of the claw portions 221 in the radial direction is the S pole. Further, in each of the magnets 23, the S pole is disposed outward in the radial direction, N The poles may be arranged toward the inner side in the radial direction. In this case, each of the claw portions 221 is magnetized so that the outer surface of each of the claw portions 221 in the radial direction is the N pole. As described above, the second magnetic pole group in the second member 2 is composed of the plurality of claw portions 221 and the plural magnets 23. Further, the magnetic poles of the second magnetic pole group are arranged to be alternately and alternately arranged in the circumferential direction. The second magnetic pole group is disposed outside the coil member 4 in the radial direction.

In detail, the yoke portion 22 has a plurality of yoke pieces 220. Fig. 5 is a front view of one yoke 220 attached to the hub axle 5. As shown in FIG. 5, the yoke piece 220 has a claw portion 221, a base portion 222, and a coupling portion 223. For example, the yoke piece 220 may be formed of electromagnetic steel or the like.

The base portion 222 extends along the central axis 51 and is in contact with the hub axle 5. The claw portion 221 extends along the central axis 51 and is disposed at a distance from the base portion 222 in the radial direction. Each of the base portions 222 is in contact with the adjacent base portions 222 in the circumferential direction. The claw portion 221 has almost the same length as the base portion 222, and is shorter than the base portion 222 in detail. The connecting portion 223 extends in the radial direction, and connects the claw portion 221 and the base portion 222 from the end portion in the axial direction (the left end portion of FIG. 5). The plurality of yoke pieces 220 thus configured are radially arranged around the central axis 51.

Fig. 6 is an exploded view of Fig. 4. Further, in Fig. 6, the magnet 23 is not shown. The second member 2 described above will be described in further detail with reference to FIG. As shown in Fig. 6, the yoke portion 22 is composed of a first yoke portion 22a and a second yoke portion 22b.

The first yoke 22a has a plurality of yokes corresponding to the above The first yoke piece 220a of 220. Each of the first yoke pieces 220a has a first claw portion 221a, a first base portion 222a, and a first connecting portion 223a. The first claw portion 221a corresponds to the above-described claw portion 221, and the first base portion 222a corresponds to the above-described base portion 222, and the first coupling portion 223a corresponds to the above-described coupling portion 223. Each of the first claw portions 221a extends in the first direction (the right direction of FIG. 6) along the central axis 51. Further, each of the first base portions 222a also extends in the first direction along the central axis 51.

The second yoke 22b is a second yoke 220b having a plurality of yoke pieces 220 as described above. Each of the second yoke pieces 220b has a second claw portion 221b, a second base portion 222b, and a second connecting portion 223b. The second claw portion 221b corresponds to the above-described claw portion 221, the second base portion 222b corresponds to the above-described base portion 222, and the second coupling portion 223b corresponds to the above-described coupling portion 223. Further, the second yoke piece 220b is opposite to the above-described first yoke piece 220a in the axial direction. In other words, each of the second claw portions 221b extends in the second direction (the left direction in FIG. 6) opposite to the first direction of the central axis 51. Further, each of the second base portions 222b also extends in the second direction along the central axis 51. In addition, the second connecting portion 223b extends in the radial direction, and connects the second claw portion 221b and the second base portion 222b to the end portion (the right end portion of FIG. 6) in the axial direction.

The first yoke portion 22a and the second yoke portion 22b are arranged such that the first claw portions 221a and the second claw portions 221b alternate in the circumferential direction. Each of the magnets 23 is disposed between each of the first claw portions 221a and each of the second claw portions 221b in the circumferential direction. The second magnetic pole group is composed of a plurality of first claw portions 221a, a plurality of second claw portions 221b, and a plurality of magnets 23. Further, the number of magnetic poles N ₂ in the second magnetic pole group is larger than the number of magnetic poles N ₁ of the first magnetic pole group to be described later. In other words, the number N _{2 of} the plurality of first claw portions 221a, the plurality of second claw portions 221b, and the plurality of magnets 23 is larger than the number of magnetic poles N ₁ of the first magnetic pole group to be described later.

As shown in Fig. 6, the coil member 4 is wound around the central axis 51. In detail, the coil member 4 is wound around the central axis 51 in a state where the coil member 4 extends between the claw portions 221 and the base portion 222 of the yoke portion 22. In other words, in the second member 2, each of the claw portions 221 and the respective magnets 23 are disposed on the outer side in the radial direction of the coil member 4, but each of the base portions 222 is disposed on the inner side in the radial direction of the coil member 4. That is, the coil member 4 is wound around the circumference of each base portion 222. The coil member 4 is configured to flow an induced current by the rotation of the first member 1. The coil member 4 has an overall cylindrical shape.

Fig. 7 is a detailed cross-sectional perspective view showing the first member 1, the third member 3, and the support member 6. As shown in Fig. 7, the third member 3 has a plurality of magnetic bodies 31. Each of the magnetic bodies 31 is disposed at a distance from each other in the circumferential direction. The third member 3 is disposed between the first member 1 and the second member 2 in the radial direction. In detail, each of the magnetic bodies 31 is disposed between the first magnetic pole group and the second magnetic pole group in the radial direction. Further, each of the magnetic bodies 31 is disposed outside the second magnetic pole group in the radial direction. The third member 3 is rotatable around the central axis 51 by the rotation of the front wheel 103. Each of the magnetic bodies 31 is a rod-shaped member that is formed in a square shape and extends in the axial direction. Each of the magnetic bodies 31 is formed of, for example, electromagnetic steel or the like.

As shown in Fig. 7, the support member 6 is a member that supports each of the magnetic bodies 31. The support member 6 is rotatable around the central axis 51 by the rotation of the front wheel 103 of the bicycle. The support member 6 is made of a non-magnetic material. For example, the support member 6 may be formed of stainless steel or the like, but may be made of resin or ceramic when it has sufficient strength to be supported by the front wheel 103 of the bicycle. The support member 6 is composed of a first support member 6a and a second support member 6b. The first support member 6a and the second support member 6b are disposed at intervals in the axial direction. Both end portions of the respective magnetic bodies 31 are supported by the first support member 6a and the second support member 6b.

The first support member 6a has a first cylindrical portion 61a and a first flange portion 62a. The first cylindrical portion 61a is formed in a cylindrical shape. In the first end portion (the right end portion of FIG. 7) of the first cylindrical portion 61a, a plurality of first groove portions 611a are formed. Each of the first groove portions 611a is formed at a distance from each other in the circumferential direction. The first end portion (the left end portion of FIG. 7) of each of the magnetic bodies 31 is engaged with each of the first groove portions 611a. In detail, the first end portion of each of the magnetic bodies 31 is fitted to each of the first groove portions 611a.

The first flange portion 62a extends outward in the radial direction from the second end portion (the left end portion of FIG. 7) of the first cylindrical portion 61a. The first flange portion 62a is formed integrally with the first cylindrical portion 61a. The first flange portion 62a has a plurality of first spoke openings 621a. Each of the first spoke holes 621a is formed at intervals in the circumferential direction. Each of the spokes 109 of the front wheel 103 is connected to each of the first spoke openings 621a.

The second support member 6b has the second cylindrical portion 61b and The second flange portion 62b. The second cylindrical portion 61b is formed in a cylindrical shape, and a plurality of second groove portions 611b are formed in the first end portion (the left end portion of Fig. 7). Each of the second groove portions 611b is formed at a distance from each other in the circumferential direction. In each of the second groove portions 611b, the second end portion (the right end portion of FIG. 7) of each of the magnetic bodies 31 is engaged. In detail, the second end portion of each of the magnetic bodies 31 is fitted to each of the second groove portions 611b. Each of the magnetic bodies 31 is supported by the first support member 6a and the second support member 6b in a state in which they are spaced apart from each other in the circumferential direction. Thereby, a rectangular opening that penetrates the third member 3 in the radial direction is formed between the respective magnetic bodies 31.

The second flange portion 62b is formed in a disk shape, and an opening portion 622 is formed in the center portion. The second cylindrical portion 61b is an opening 622 that is fitted to the second flange portion 62b. Thereby, the second flange portion 62b and the second cylindrical portion 61b are integrally formed. The second flange portion 62b has a plurality of second spoke openings 621b. Each of the second spoke holes 621b is formed at intervals in the circumferential direction. Each of the spokes 109 of the front wheel 103 is connected to each of the second spoke openings 621b.

As shown in FIG. 3, the first support member 6a is attached to the hub axle 5 through the first bearing member 7a. In detail, the cover member 8 is disposed between the first support member 6a and the first shaft member 7a. Further, a positioning member 9 is disposed between the hub axle 5 and the first bearing member 7a. The second support member 6b is attached to the hub axle 5 through the second bearing member 7b. The third member 3 fitted to the support member 6 is relatively rotatable with respect to the hub axle 5 and the second member 2 by the first bearing member 7a and the second bearing member 7b.

The cover member 8 is fitted into the first support member 6a and rotates integrally with the first support member 6a. The positioning member 9 is a member for preventing the second member 2 from moving in the axial direction. In detail, the positioning member 9 is fixed to the hub axle 5, and the end surface is in contact with the first end surface (the left end surface of Fig. 3) of the second member 2. Further, the second end surface (the right end surface of the third figure) of the second member 2 is in contact with the shoulder portion 52 of the hub axle 5. This shoulder portion 52 restricts the movement of the second member 2 in the axial direction.

As shown in FIG. 7, the first member 1 is disposed on the outer side in the radial direction of the third member 3. The first member 1 is supported by the first support member 6a via the third bearing member 7c. Further, the first member 1 is supported by the second support member 6b through the fourth bearing member 7d. The first member 1 is rotatably supported by the support member 6 by the third and fourth bearing members 7c and 7d. That is, the first member 1 is rotatable around the central axis 51 with respect to the third member 3. The first member 1 is supported by the support member 6 by the outer peripheral portion of the third member 3 that transmits the power of the front wheel 103, and the first member 1 can reinforce the rigidity of the third member 3.

Fig. 8 is a perspective view of the first member 1. As shown in Fig. 8, the first member 1 has a case portion 11 and a first magnetic pole group. The shell portion 11 is formed in a cylindrical shape. The first magnetic pole group is attached to the inner peripheral surface of the case portion 11. The first magnetic pole group has an overall cylindrical shape. The first magnetic pole group is disposed on the outer side in the radial direction of each of the magnetic bodies 31. The first magnetic pole group is composed of a plurality of magnetic poles 12. Each of the magnetic poles 12 is arranged to be alternately and alternately arranged in the circumferential direction. In detail, the first magnetic pole group is composed of one or a plurality of magnets. Each magnetic pole 12 of each magnet is in the circumferential direction Become interactively and heterogeneously configured. Each of the magnetic poles 12 extends in the axial direction. Further, the number of magnetic poles of the first magnetic pole group is the same as the number of the plurality of claw portions 221 of the yoke portion 22. In other words, the number of magnetic poles 12 is the same as the total number of the first claw portions 221a and the number of the second claw portions 221b.

Fig. 9 is a cross-sectional view taken along line BB of Fig. 2; As shown in Fig. 9, the number of the magnetic bodies 31 included in the third member 3 is an integer N ₃ represented by N ₃ = N ₂ /2 ± N ₁ /2. Further, N ₁ is the number of magnetic poles in the first magnetic pole group, that is, the number of magnetic poles 12 is displayed. Further, N ₂ is the number of magnetic poles in the second magnetic pole group, that is, the total number of the first claw portions 221a and the number of the second claw portions 221b and the number of the magnets 23 are displayed. That is, in the case of the example shown in Fig. 9, in the first magnetic pole group, the number of magnetic poles N ₁ is 28, and the magnetic pole pairs of 14 are formed. Further, the number of magnetic poles N ₂ of the second magnetic pole group is 56. Therefore, N ₃ is set to 42. Further, N ₁ and N _{2 are} set such that N ₃ /(N ₁ /2) is larger than 1.

The bicycle generator 10 configured as described above is rotated by the front wheel 103 to rotate the first and second support members 6a and 6b connected to the respective spokes 109 of the front wheel 103. Further, the third member 3 supported by the first and second support members 6a and 6b is rotated. That is, the third member 3 is rotated by the rotation of the front wheel 103. The rotational speed of the third member 3 is the same as the rotational speed of the front wheel 103.

Here, the value represented by the above N ₃ /(N ₁ /2) is a speed increase ratio indicating the rotational speed of the first member 1 with respect to the rotational speed of the third member 3. By setting the values of N ₁ and N ₂ such that the value of N ₃ /(N ₁ /2) is larger than 1, the rotation speed of the first member 1 can be made larger than the rotation speed of the third member 3. That is, the rotation of the first member 1 can be increased more than the rotation speed of the rotating portion, that is, the front wheel 103. For example, when N ₁ is 28, N ₂ is 56, and N ₃ is 42, the value of the speed increase ratio N ₃ /(N ₁ /2) is 3. That is, the rotation speed of the third member 3 can be three times the rotation speed of the first member 1.

The first member 1 is rotated by the rotation of the third member 3. As described above, the rotational speed of the first member 1 is larger than the rotational speed of the third member 3. Further, when the first member 1 rotates, an induced current flows in the coil member 4 to generate electric power. As described above, in the bicycle generator 10 of the first embodiment, since the rotational speed of the first member 1 is larger than that of the front wheel 103, electric power can be efficiently generated. Therefore, according to the first embodiment, it is possible to realize a compact bicycle generator as compared with the conventional bicycle generator.

Further, in the bicycle generator 10 of the first embodiment, the magnet portion 23 is disposed between the respective claw portions 221, whereby the claw portion 221 can be magnetized, and the magnet 23 and the claw portion 221 form the second magnetic pole group. In other words, the space between the claw portions 221 as the yokes provided in the conventional bicycle generator is used as a space for arranging the magnets 23, and the claw portions 221 are magnetized as a part of the magnetic poles of the second magnetic pole group. Therefore, the weight and volume of the second member 2 can be reduced. Therefore, it is realized as a bicycle generator that can be made smaller and lighter.

[Second Embodiment]

Fig. 10 is a perspective view of a bicycle generator according to a second embodiment, and Fig. 11 is a perspective view of the bicycle generator in a state in which the second member of the second embodiment is removed. The bicycle generator 10 of the second embodiment is mounted on the bicycle 101 in the same manner as in the first embodiment.

In the first embodiment, the second member 2 has the yoke portion 22. However, as shown in Figs. 10 and 11, the third member 3 has at least a part of the yoke portions 31a and 31b in the second embodiment. Further, the yoke portions 31a and 31b have a plurality of claw portions 311a and 311b extending in the direction along the central axis.

Each of the claw portions 311a and 311b is disposed at equal intervals in the circumferential direction. Each of the claw portions 311a and 311b includes a magnetic body. In detail, the magnetic body of the third member 3 is composed of the claw portions 311a and 311b of the yoke portions 31a and 31b.

The yoke portions 31a and 31b have at least one first yoke portion 31a and at least one second yoke portion 31b. For example, the yoke portions 31a and 31b have three first yoke portions 31a and three second yoke portions 31b.

Each of the first yoke portions 31a includes a plurality of first claw portions 311a extending in the first direction (the right direction in FIG. 12) along the central axis. In detail, each of the first yoke portions 31a has a plurality of first yoke pieces 310a. For example, each of the first yoke portions 31a has n first yoke pieces 310a. The n first yoke pieces 310a are arranged side by side in the circumferential direction.

Further, the bicycle generator 10 shown in Fig. 11 has three first yoke portions 31a, and each of the first yoke portions 31a has four first yoke pieces 310a. Therefore, the bicycle generator 10 shown in Fig. 11 is There are a total of twelve first yoke pieces 310a.

As shown in Fig. 12, each of the first yoke pieces 310a includes a first claw portion 311a, a first base portion 312a, and a first connecting portion 313a. The first claw portion 311a extends in the first direction. The first base portion 312a extends in the same direction as the first claw portion 311a. In other words, the first base portion 312a extends in the first direction. The first base portion 312a is in contact with the hub axle 5. The first claw portion 311a and the first base portion 312a are arranged at intervals in the radial direction.

The first connecting portion 313a extends in the radial direction. The first connecting portion 313a connects the first claw portion 311a and the first base portion 312a from the end portion in the axial direction. In detail, the first connecting portion 313a connects the proximal end portion of the first claw portion 311a and the proximal end portion of the first base portion 312a.

As shown in Fig. 11, each of the second yoke portions 31b includes a plurality of second claw portions 311b extending in the second direction (the left direction in Fig. 12) along the central axis in the opposite direction to the first direction. In detail, each of the second yoke portions 31b has a plurality of second yoke pieces 310b. For example, each of the second yoke portions 31b has n second yoke pieces 310b. The number n of the second yoke pieces 310b included in each of the second yoke portions 31b is the same as the number n of the first yoke sheets 310a of each of the first yoke portions 31a.

Each of the second yoke portions 31b has the same configuration as the above-described first yoke portions 31a except that the direction of each of the second yoke pieces 310b is different. Therefore, detailed description thereof will be omitted. Further, the second claw portion 311b and the second base portion 312b of each of the second yoke pieces 310b extend in the second direction. The number of the second yoke portions 31b is the same as the number of the first yoke portions 31a. Base part 313a and 313b are in contact with the adjacent base portions 312a and 312b in the circumferential direction.

The total number N _{3 of the} first claw portions 311a and the second claw portions 311b is set to n for each of the claw portions 311a and 311b of each of the yoke portions 31a and 31b, and the number of magnetic poles in the first magnetic pole group is set. When N ₁ is formed, N ₃ = nN ₁ .

Each of the first yoke portion 31a and each of the second yoke portions 31b is alternately arranged in the circumferential direction. In detail, each of the first yoke portion 31a and each of the second yoke portions 31b are alternately disposed adjacent to each other without interference in the circumferential direction. That is, in the circumferential direction, the n first yoke pieces 310a are continuously juxtaposed, and adjacent to the n second yoke pieces 310b are continuously arranged in parallel.

The third member 3 is non-rotatable around the central axis 51. In detail, the third member 3 is supported non-rotatably around the hub axle 5. For example, the third member 3 is fixed to the hub axle 5.

As shown in Fig. 12, the bicycle generator 10 according to the seventh modification is arranged in the order of the first member 1, the third member 3, and the second member 2 from the inner side in the radial direction. In detail, each of the magnetic bodies, that is, the first and second claw portions 311a and 311b, is disposed on the outer side in the radial direction of the first magnetic pole group and on the inner side in the radial direction of the second magnetic pole group.

The first member 1 is rotatably supported around the central axis 51 around the first and second base portions 312a and 312b. In detail, the first member 1 is supported by the first and second base members 312a and 312b through a bearing member (not shown).

The first member 1 is disposed on each of the first and second pedestals The portions 312a and 312b are disposed on the outer side in the radial direction of the first and second claw portions 311a and 311b. In other words, the first member 1 is disposed between the first and second base portions 312a and 312b and the first and second claw portions 311a and 311b in the radial direction.

The first member 1 has a third support member 14 and a first magnetic pole group including the plurality of magnetic poles 12. The third support member 14 has a cylindrical shape and is rotatably supported by each of the first and second base portions 312a and 312b. The first magnetic pole group is attached to the outer peripheral surface of the third support member 14.

The number of magnetic poles of the first magnetic pole group is the same as the number of the yoke portions 31a and 31b. For example, the bicycle generator 10 shown in Fig. 11 has six yoke portions 31a and 31b (three first yoke portions 31a and three second yoke portions 31b), so the number of magnetic poles of the first magnetic pole group It is to become 6. Further, the other configuration of the first member 1 is substantially the same as that of the first member 1 of the first embodiment, and thus detailed description thereof will be omitted.

The second member 2 is rotatable around the central axis by the rotation of the front wheel or the rear wheel. For example, the second member 2 is connected to the spoke wire of the front wheel or the rear wheel, and is rotatable integrally with the front wheel or the rear wheel. As shown in Fig. 12, the second member 2 has a fourth support member 24 and a second magnetic pole group.

The fourth support member 24 has a cylindrical shape. The second magnetic pole group is attached to the inner circumferential surface of the fourth support member 24. The second magnetic pole group has a plurality of magnetic poles 23. The second magnetic pole group is composed of one or a plurality of magnets. Moreover, the other structure of the second member 2 is the same as the first one. Since the second member 2 of the embodiment is substantially the same, detailed description thereof will be omitted.

The coil member 4 is disposed on the outer side in the radial direction of the first and second base portions 312a and 312b, and is disposed on the inner side in the radial direction of the first and second claw portions 311a and 311b. In other words, the coil member 4 is disposed between the first and second base portions 312a and 312b and the first and second claw portions 311a and 311b in the radial direction.

The coil member 4 is arranged in parallel with the first member 1 in the axial direction. Specifically, the coil member 4 is disposed to face the both end portions of the first member 1 in the axial direction. The coil members 4 arranged in two in the axial direction may be electrically connected, and may be separately generated. Further, when the two coil members 4 are separately generated, the electric power may be totaled after power generation. Further, as shown in Fig. 13, the coil member 4 may be disposed to face only one end portion of the first member 1 in the axial direction.

As shown in Fig. 14, the coil member 4 may be arranged in parallel with the third support member 14 in the axial direction. In this case, a part of each of the magnetic poles 12 constituting the first magnetic pole group is disposed outside the coil member 4 in the radial direction. For example, the coil member 4 is disposed to face the both end portions of the third support member 14 in the axial direction.

As shown in Fig. 15, the first member 1 may be divided into two in the axial direction. In this case, the coil member 4 is disposed between the first members 1 in the axial direction. The coil member 4 has two small diameter portions 41 and a large diameter portion 42. A large diameter portion 42 is disposed between each of the small diameter portions 41. Each of the small diameter portion 41 and the large diameter portion 42 is integrally formed. Each magnetic pole 12, The outer peripheral surfaces of the small diameter portions 41 face each other with a space therebetween.

In the bicycle generator 10 of the second embodiment configured as described above, the first member 1 faces the yoke portions 31a and 31b. Therefore, power generation can be performed more efficiently.

[Modification]

The first and second embodiments of the present invention have been described above, but the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the invention.

Modification 1

In the first and second embodiments described above, the bicycle generator 10 is not particularly limited to the hub that is the front wheel 103 and is attached to the front wheel 103. For example, the bicycle generator 10 may be mounted on the rear wheel 104 as a hub of the rear wheel 104.

Modification 2

Fig. 16 is a schematic view showing a bicycle generator 10 according to a second modification. As shown in Fig. 10, the bicycle generator 10 may be installed around the crankshaft 107a (an example of a rotating portion). In detail, the crankshaft 107a is supported by a part of the frame 102 of the bicycle 101 through the fifth bearing member 7e, that is, the floor bracket hanger 102a.

The second member 2 is disposed on the outer side in the radial direction of the crankshaft 107a. The second member 2 is rotatable around the central axis 107c. Further, in Modification 2, the center axis line 107c is the central axis of the crankshaft 107a of the bicycle 101. The second member 2 is attached to the crankshaft 107a and rotates integrally with the crankshaft 107a.

The third member 3 is disposed outside the second member 2 in the radial direction. The third member 3 is non-rotatable around the central axis 107c. In detail, the third member 3 is fixed to the floor bracket hanger 102a. Further, the third member 3 is not rotatable around the central axis 107c, and the fixing and fixing method of the third member 3 are not particularly limited.

The first member 1 is disposed outside the third member 3 in the radial direction. The first member 1 is rotatable around the central axis 107c. In detail, the first member 1 is supported by the third member 3 through the third and fourth bearing members 7c and 7d. As described above, in the bicycle generator 10 according to the second modification, the second member 2 is rotatable around the central axis 107c, and the third member 3 is non-rotatable around the central axis 107c. Further, since the other configurations are basically the same as those of the first embodiment described above, the description thereof is omitted.

Modification 3

In the first embodiment described above, the third member 3 is rotatable around the central axis 51, and the second member 2 is not rotatable around the central axis 51, but is not particularly limited thereto. The second member 2 and the third member 3 may be configured to relatively rotate around the central axis 51. For example, the second member 2 is rotatably formed around the central axis 51, and the third structure The member 3 may be configured to be non-rotatable around the central axis 51.

Modification 4

As shown in Fig. 17, the bicycle generator 10 may further include a cover member 13. The lid member 13 is disposed on the outer side in the radial direction of the first member 1. The cover member 13 is disposed at a distance from the first member 1. The lid member 13 is coupled to the support member 6 at both end portions in the axial direction. In detail, the cover member 13 is formed in a cylindrical shape. The first end portion of the lid member 13 is coupled to the first support member 6a, and the second end portion of the lid member 13 is coupled to the second support member 6b. The cover 13 is for safely covering the outer peripheral surface of the first member 1 that is rotated at a higher speed than the front wheel 103.

Modification 5

In the first embodiment described above, the support member 6 is constituted by the first support member 6a and the second support member 6b, but is not particularly limited thereto. For example, as shown in Fig. 18, the support member 6 may have one cylindrical portion 61 and a pair of flange portions 62a and 62b. A plurality of groove portions 611 are formed in the inner circumferential surface of the cylindrical portion 61. Each of the groove portions 611 is disposed at a distance from each other in the circumferential direction and extends in the axial direction. Each of the magnetic bodies 31 is housed in each of the groove portions 611.

Modification 6

In the first embodiment, the yoke portion 22 is constituted by the first yoke portion 22a and the second yoke portion 22b, but is not particularly limited thereto. For example, yoke The portion 22 may be constituted only by the first yoke 22a or the second yoke 22b. In this case, each of the magnets 23 is disposed between each of the first claw portions 221a or between the respective second claw portions 221b.

Modification 7

In the second embodiment described above, the first member 1 is rotatably supported by the base portions 312a and 312b, but is not particularly limited thereto. For example, the first member 1 may be rotatably supported by the hub axle 5. Hereinafter, a bicycle generator according to a seventh modification will be described.

As shown in Fig. 19, the first member 1 is disposed on the outer side in the radial direction of the hub axle 5. The first member 1 is disposed with a gap between the hub axles 5 . The first member 1 is rotatably supported around the hub axis 5 about the central axis 51. For example, the first member 1 is supported by the hub axle 5 through a bearing member.

The second member 2 is disposed on the outer side in the radial direction of the first member 1. The second member 2 is disposed with a gap between the first members 1 . Between the first member 1 and the second member 2, each of the claw portions 311a and 311b to be described later is disposed.

The coil member 4 is disposed on the outer side in the axial direction of the first member 1. The coil member 4 is disposed at a distance from the first member 1 in the axial direction. Between the coil member 4 and the first member 1, each of the connection portions 313a and 313b to be described later is disposed.

As shown in Fig. 20, the third member 3 has at least a part of the yoke portions 31a and 31b. The yokes 31a, 31b have: at least 1 The first yoke portion 31a and the at least one second yoke portion 31b. For example, the yoke portions 31a and 31b have three first yoke portions 31a and three second yoke portions 31b. The first yoke portion 31a and the second yoke portion 31b are alternately arranged in the circumferential direction.

Each of the first yoke portions 31a has a plurality of first yoke pieces 310a. For example, each of the first yoke portions 31a has four first yoke pieces 310a. As shown in Fig. 19, each of the first yoke pieces 310a has a first claw portion 311a, a first base portion 312a, and a first connecting portion 313a.

The first claw portion 311a extends in the axial direction. The first claw portion 311 a is disposed between the first member 1 and the second member 2 in the radial direction. Further, the first claw portion 311a is disposed on the outer side in the radial direction of the coil member 4. The proximal end portion 3111a of the first claw portion 311a is located outside the coil member 4 in the axial direction.

The first base portion 312 a is disposed on the inner side in the radial direction of the coil member 4 . In other words, the coil member 4 is disposed between the first claw portion 311a and the first base portion 312a in the radial direction. The proximal end portion 3121a of the first base member 312a is located outside the coil member 4 in the radial direction.

The tip end portion 3122a of the first base portion 312a is located between the coil member 4 and the first member 1 in the axial direction. In other words, the first base portion 312a is not overlapped with the first member 1 in the axial direction. The first base portion 312a is not disposed on the inner side in the radial direction of the first member 1.

The first connecting portion 313 a is disposed on the outer side in the axial direction of the coil member 4 . The first connecting portion 313a is the first claw portion 311a and The first base portion 312a is coupled. In detail, the first connecting portion 313a extends in the radial direction. The first connecting portion 313a connects the base end portion 3111a of the first claw portion 311a and the base end portion 3112a of the first base portion 312a. In other words, the first claw portion 311a and the first base portion 312a extend from the first connecting portion 313a in the first direction along the central axis, and the length of the first claw portion 311a in the axial direction is larger than that of the first base portion 312a. The length of the axis direction is longer.

As shown in Fig. 20, each of the second yoke portions 31b has a plurality of second yoke pieces 310b. Moreover, the number of the second yoke pieces 310b included in each of the second yoke portions 31b is the same as the number of the first yoke sheets 310a of each of the first yoke portions 31a. For example, each of the second yoke portions 31b has four second yoke pieces 310b.

As shown in Fig. 19, each of the second yoke pieces 310b has a second claw portion 311b, a second base portion 312b, and a second coupling portion 313b.

The second claw portion 311b extends in the axial direction. The second claw portion 311b is disposed between the first member 1 and the second member 2 in the radial direction. Further, the second claw portion 311b is not disposed outside the coil member 4 in the radial direction. In other words, the second claw portion 311b is not overlapped with the coil member 4 in the axial direction.

In detail, the proximal end portion 3111b of the second claw portion 311b is located between the coil member 4 and the first member 1 in the axial direction. In other words, the proximal end portion 3111b of the second claw portion 311b is located on the inner side in the axial direction of the coil member 4.

The second base portion 312b is disposed on the coil member 4 More radially inside. In other words, the second base portion 312b is disposed between the hub axle 5 and the coil member 4 in the radial direction.

The base end portion 3121b of the second base portion 312b is located on the inner side in the axial direction of the coil member 4. In other words, the base end portion 3121b of the second base portion 312b is located between the coil member 4 and the first member 1 in the axial direction. The tip end portion 3122b of the second base portion 312b is located outside the coil member 4 in the axial direction. In this manner, the second base portion 312b is not overlapped with the first member 1 in the axial direction. The second base portion 312b is not disposed on the inner side in the radial direction of the first member 1.

The second connecting portion 313b is disposed between the coil member 4 and the first member 1 in the axial direction. The second connecting portion 313b connects the second claw portion 311b and the second base portion 312b. Specifically, the second connecting portion 313b extends in the radial direction. The second connecting portion 313b connects the proximal end portion 3111b of the second claw portion 311b and the proximal end portion 3112b of the second base portion 312b. In other words, the second claw portion 311b extends from the second connecting portion 313b in the first direction along the central axis, and the second base portion 312b is opposite to the first direction along the central axis from the second connecting portion 313b. The second direction extends.

The first member 1 is rotatably supported by the hub axle 5 around the central axis 51 by a bearing member (not shown) disposed in a space provided between the hub axle 5 and the first member 1.

In the bicycle generator 10 according to the seventh modification, the first base portion 312a and the second base portion 312b are not disposed on the inner side in the radial direction of the first member 1. Thus, in The inner side of the first member 1 in the radial direction can secure a sufficient space for arranging a bearing member (not shown). Further, the first member 1 can be supported by the hub axle 5. Thereby, the bicycle generator 10 can be further miniaturized.

Modification 8

In the second embodiment and the seventh modification, the arrangement relationship between the first member 1 and the second member 2 may be reversed. In other words, the first member 1 may be disposed on the outer side in the radial direction of each of the claw portions 311a and 311b, and the second member 2 may be disposed on the inner side in the radial direction of each of the claw portions 311a and 311b.

1‧‧‧1st component

2‧‧‧2nd member

3‧‧‧3rd component

4‧‧‧ coil components

5‧‧·Wheel axle

12‧‧‧ magnetic pole

14‧‧‧3rd support member

51‧‧‧ center axis

Claims (29)

A bicycle generator is a bicycle generator that generates electric power by rotation generated by a rotating portion of a bicycle, and includes: a first member having a first magnetic pole including a plurality of magnetic poles that are alternately arranged in a circumferential direction The second member is rotatable about a central axis; and the second member is a second member including a second magnetic pole group that is a plurality of magnetic poles that are alternately and alternately arranged in the circumferential direction, and the number of magnetic poles of the second magnetic pole group The number of magnetic poles is larger than that of the first magnetic pole group; and the third member has a plurality of magnetic bodies arranged at intervals in the circumferential direction, and is disposed in the radial direction in the first member and the second member. And the coil member is configured to cause an induced current to flow by the rotation of the first member; and the second member and the third member are relatively rotated about the central axis by the rotation of the rotating portion . The bicycle generator according to claim 1, wherein each of the magnetic bodies is disposed between the first magnetic pole group and the second magnetic pole group in the radial direction. The bicycle generator according to claim 1 or 2, wherein the number of the magnetic bodies is such that the number of magnetic poles in the first magnetic pole group is N ₁ and the number of magnetic poles in the second magnetic pole group is set to When N ₂ is an integer N ₃ represented by N ₃ = N ₂ /2 ± N ₁ /2. The bicycle generator according to claim 1 or 2, wherein one of the second member and the third member is rotatable around the central axis by rotation of the rotating portion, and the second member and The other of the third members is not rotatable around the central axis. The bicycle generator according to claim 1 or 2, wherein the third member has a yoke including a plurality of claw portions extending in a direction along the central axis, wherein each of the claw portions includes the aforementioned Magnetic body. The bicycle generator according to claim 5, wherein the coil member is disposed at an outer interval from the first member in the axial direction, and the yoke portion has at least one first yoke portion. And at least one of the second yoke portions, wherein the first and second yoke portions are alternately arranged in the circumferential direction, and the first yoke portion includes the first member and the second member toward the front side a plurality of first claw portions extending in the axial direction, and a plurality of first base portions disposed on the inner side in the radial direction of the coil member, and the first claw portions disposed on the outer side in the axial direction of the coil members The plurality of first connecting portions that are connected to the first base portion, the second yoke portion includes a plurality of second claw portions that extend in the axial direction between the first member and the second member, and are disposed a plurality of second base portions on the inner side in the radial direction of the coil member, and a plurality of second base portions and the second base portion that are disposed between the coil member and the first member in the axial direction The second joint. The bicycle generator according to claim 5, wherein the yoke portion includes at least one first yoke portion including a plurality of first claw portions extending in a first direction along the central axis, and At least one second yoke portion including a plurality of second claw portions extending in a second direction opposite to the first direction and extending along the central axis, wherein each of the first yoke portions and each of the second yoke portions is The aforementioned circumferential directions are alternately configured. The bicycle generator according to claim 6, wherein each of the first yoke portions and the second yoke portions are disposed adjacent to each other without interfering with each other in the circumferential direction. The bicycle generator according to the sixth aspect of the invention, wherein the total number N ₃ of the first claw portion and the second claw portion is the first claw portion and each of the first yoke portions The number of the second claw portions of the second yoke portion is set to n, and when the number of magnetic poles in the first magnetic pole group is N ₁ , N ₃ = nN ₁ . A bicycle generator as claimed in claim 5, In the above, each of the claw portions is disposed at equal intervals in the circumferential direction. In the bicycle generator according to the fifth aspect of the invention, the coil member is disposed in parallel with the first member or the second member disposed inside the respective magnetic bodies in the axial direction. The bicycle generator according to claim 11, wherein the coil member is opposite to both end portions of the first member or the second member disposed in the axial direction inside the respective magnetic members. Configured to the ground. The bicycle generator according to claim 1 or 2, wherein each of the magnetic bodies is disposed on the outer side in the radial direction of the first magnetic pole group and on the inner side in the radial direction than the second magnetic pole group. The bicycle generator according to claim 1 or 2, wherein the second member is rotatable around the central axis by rotation of the rotating portion, and the third member is not rotatable around the central axis. Rotate. The bicycle generator according to claim 1 or 2, wherein the second member is non-rotatable around the central axis, and the third member is wound around the center by the rotation of the rotating portion. The axis is rotatable around it. The bicycle generator according to claim 3, wherein the second member is non-rotatable around the central axis, and the third member is rotatable around the central axis by rotation of the rotating portion. The above N ₁ and the aforementioned N ₂ are set such that the absolute value of N ₃ /(N ₁ /2) is larger than 1. The bicycle generator according to claim 15, wherein the second member includes a yoke including a plurality of claw portions extending in a direction along the central axis, and a plurality of magnets, wherein the respective magnets are The circumferential direction is disposed between the plurality of claw portions, and the second magnetic pole group is composed of the plurality of claw portions and the plurality of magnets. The bicycle generator according to claim 17, wherein the yoke includes a first yoke portion provided with a plurality of first claw portions extending in a first direction along the central axis, and In the opposite direction to the aforementioned first direction and along the aforementioned central axis The second yoke of the plurality of second claw portions extending in the second direction, wherein the respective magnets are disposed between the first claw portions and the second claw portions in the circumferential direction, and the second magnetic pole group The first plurality of claw portions, the plurality of second claw portions, and the plurality of magnets are formed. The bicycle generator according to claim 15, wherein the number of magnetic poles of the first magnetic pole group is the same as the number of the plurality of claw portions. A bicycle generator according to claim 1 or 2, wherein the coil member is wound around the central axis. The bicycle generator according to claim 1 or 2, wherein the second magnetic pole group is disposed outside the coil member in a radial direction outer side, and the magnetic body is disposed to be larger than the second magnetic pole The group is further outward in the radial direction, and the first magnetic pole group is disposed on the outer side in the radial direction of the magnetic body. The bicycle generator according to claim 1 or 2, further comprising a support member that is rotatable around the central axis by the rotating portion of the bicycle and supports the magnetic bodies. The bicycle generator according to claim 22, wherein the support member is a first support member and a second support that are disposed at intervals in the axial direction and support both end portions of the magnetic bodies Constructed by components. A bicycle generator according to claim 22, wherein the support member is made of a non-magnetic material. The bicycle generator according to claim 22, further comprising a bearing member disposed between the first member and the support member and rotatably supporting the first member with respect to the support member. A bicycle generator according to claim 22, wherein the rotating portion is a bicycle wheel, and the support member is configured to connect the spokes of the wheel. The bicycle generator according to claim 22, further comprising a cover member disposed to be spaced apart from the first member in the radial direction outer side of the first member. Such as the bicycle generator of claim 27, wherein The cover member is coupled to the support member by both end portions in the axial direction. The bicycle generator according to claim 22, wherein the rotating portion is a crankshaft of a bicycle, and the support member is coupled to the crankshaft.