Power generation system

Abstract

To provide a power generation system capable of making a dynamo provided on a bicycle generate power without pedaling.SOLUTION: The power generation system S is a power generation system of a bicycle 1 having a rear wheel 11, right and left cranks 15 for rotating the rear wheel 11, and a dynamo adjacent to the rear wheel 11 and generating power by rotation of the rear wheel 11, and includes a blade 4. The blade 4 has a peripheral wall 41, a fixed part fixed to the crank 15 together with the peripheral wall 41 on the inside of the peripheral wall 41 in a state that the center of the peripheral wall and the crankshaft are arranged on the same axis, and a plurality of vanes 42 extending outward from the peripheral wall 41. The power generation system S rotates the rear wheel 11 and causes the dynamo to generate power by the peripheral wall 41 rotating together with the crank 15 when the blades 42 receive a water flow or wind.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a power generation system using a bicycle. [Background technology]

[0002] Traditionally, bicycles have been equipped with a dynamo (generator) mounted on the front wheel, which generates electricity to power the front light. Dynamos are broadly divided into rim dynamos and hub dynamos. Rim dynamos are a long-standing power generating device consisting of a main body and an axle extending from the main body. This axle contacts the side of the bicycle's front wheel rim or tire and rotates as the bicycle moves. Rim dynamos generate electricity through this rotational motion. Unlike these traditional rim dynamos, rim dynamos that utilize eddy current have recently been released. Hub dynamos, on the other hand, are generators built into the front wheel axle (hub). Like rim dynamos, hub dynamos generate electricity by rotating the hub while the bicycle is moving. Hub dynamos generate electricity more efficiently because they have less resistance than contact-type rim dynamos.

[0003] Another known non-contact bicycle generator is disclosed in Patent Document 1. This device has a permanent magnet with an arrangement of south and north poles joined to the iron core of a power generating coil, and the south and north poles are positioned facing the spokes of the front or rear wheel of the bicycle, generating electricity as the wheel rotates.

[0004] Devices that utilize the power generated by such bicycle dynamos have been developed. For example, the power supply system disclosed in Patent Document 2 includes a charging module electrically connected to the dynamo, and supplies power to a mobile phone or storage battery via a USB connector. This power supply system effectively utilizes the power generated by the bicycle dynamo. Furthermore, such a power supply system can also be effectively used as a temporary power supply in the event of a power outage due to a disaster.

[0005] Incidentally, the power supply system disclosed in Patent Document 2 generates electricity while the vehicle is moving, so naturally, it cannot generate electricity unless the pedals are pedaled. Therefore, although it can be effectively used as a short-term power generation system in the event of a power outage during a disaster, if the power outage lasts for a long period of time, it is insufficient as a power source until the power is restored. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-68259 [Patent Document 2] Utility Model Registration No. 3189067 Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a power generation system that can make a dynamo mounted on a bicycle generate electricity without the need for pedaling. [Means for solving the problem]

[0008] In order to solve the above problems, the power generation system according to the present invention comprises: A bicycle power generation system having a rear wheel, left and right cranks for rotating the rear wheel, and a dynamo adjacent to the rear wheel for generating electricity by the rotation of the rear wheel, the system including blades: The blade has a peripheral wall, a fixing portion that is fixed to the crank together with the peripheral wall inside the peripheral wall with the center of the peripheral wall and the crankshaft aligned on the same axis, and a plurality of vanes that extend outward from the peripheral wall, When the blades receive the water current or wind, the peripheral wall rotates together with the crank, causing the rear wheel to rotate and generating electricity from the dynamo.

[0009] The power generation system preferably comprises: a plurality of spoke blades connected to each spoke of the rear wheel; The boat is further provided with a stand that exposes the upper half of the rear wheel from the water surface and sets the height at which the lower part of the rear wheel receives water resistance, and exposes the upper half of the peripheral wall from the water surface and sets the height at which the lower part of the peripheral wall receives water resistance.

[0010] In order to solve the above problems, the blade according to the present invention comprises: A blade used in a power generation system for a bicycle having a rear wheel, left and right cranks for rotating the rear wheel, and a dynamo adjacent to the rear wheel for generating electricity by the rotation of the rear wheel, The surrounding wall and a fixing portion that is fixed to the crank together with the peripheral wall on the inside of the peripheral wall in a state in which the center of the peripheral wall and the crankshaft are arranged on the same axis; a plurality of blades extending outward from the peripheral wall; When the blades receive the water current or wind, the peripheral wall rotates together with the crank, causing the rear wheel to rotate and generating electricity from the dynamo.

[0011] The blade preferably has: The fixed part is a first holding portion that holds the upper or lower portion of the crank from the left and right directions; and a second holding portion that holds the upper or lower portion of the crank from the front-to-rear direction.

[0012] The blade preferably has: The bicycle further comprises a side wall having holes for receiving the cranks and pedals of the bicycle; The peripheral wall protrudes from the side wall, and the fixing portion is fixed to the side wall.

[0013] The blade preferably has: The fixed part is a vertical plate having a plurality of screw holes and surrounding the crank; a first screw; The crank is fixed by surrounding it with a plurality of vertical plates and pressing the tips of first screws disposed in the screw holes of the vertical plates.

[0014] The blade preferably has: The fixed part is a support portion extending outward in the left-right direction from the vertical plate; a first horizontal plate having a plurality of screw holes and fixed to the support portion, the first horizontal plate extending in a horizontal direction; a second horizontal plate having a plurality of screw holes and a second screw; The bicycle pedal is fixed by clamping the pedal between the first horizontal plate and the second horizontal plate and connecting the first horizontal plate and the second horizontal plate with the second screw.

[0015] In order to solve the above problems, a power generation method according to the present invention includes: A method for generating electricity for a bicycle having a rear wheel, left and right cranks for rotating the rear wheel, and a dynamo adjacent to the rear wheel that generates electricity by the rotation of the rear wheel, comprising: a blade including a peripheral wall, a fixing portion disposed inside the peripheral wall, and a plurality of vanes extending outward from the peripheral wall, and the blade is fixed to the crank by the fixing portion in a state in which the center of the peripheral wall and the crankshaft are disposed on the same axis; The blades are exposed to water currents or wind and rotate together with the crank, thereby rotating the rear wheel and generating electricity from the dynamo. [Effects of the Invention]

[0016] The power generation system according to the present invention uses hydraulic power to enable a dynamo mounted on a bicycle to generate electricity without the need for pedaling. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic side view showing a power generation system according to an embodiment of the present invention. [Figure 2] FIG. 10 is a schematic perspective view showing an image of blade installation. [Figure 3] FIG. 2 is a schematic side view showing a blade. [Figure 4] FIG. 3 is a schematic perspective view showing a first holding portion. [Figure 5] FIG. 4 is a schematic perspective view showing a second holding portion. [Figure 6] FIG. 2 is a schematic front view showing the first and second holding portions. [Figure 7] FIG. 2 is a schematic front view showing the outer and inner shapes of the blade. [Figure 8] FIG. 2 is a schematic side view showing the power generation system installed in a waterway. [Figure 9] FIG. 10 is a schematic perspective view showing a bracket according to a modified example of the blade. [Figure 10] 1A shows a bracket, where FIG. 1A is a schematic front view, FIG. 1B is a schematic side view, and FIG. 1C is a schematic plan view. [Figure 11] FIG. 10 is a schematic side view showing a side wall according to a modified example. [Figure 12] FIG. 10 is a schematic side view showing a blade of a power generation system according to another modified example. [Figure 13] 10A shows yet another modified example, in which FIG. 10A is a perspective view showing the spoke blades and spokes, and FIG. 10B is a schematic side view showing the blades disposed on each spoke. [Figure 14] FIG. 10 is a schematic side view showing a power generation system according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of a power generation system of the present invention and a power generation blade (hereinafter simply referred to as "blade") used in the system will be described with reference to the accompanying drawings. In the drawings, the X axis indicates the front-rear direction, the Y axis indicates the left-right direction, and the Z axis indicates the up-down direction.

[0019] FIG. 1 is a schematic side view showing a power generation system S according to this embodiment. As shown in FIG. 1, the power generation system S includes a bicycle 1, a blade 4, a first stand 2, and a second stand 3. The first stand 2 and the second stand 3 correspond to the "stands" of the present invention. The power generation system S is configured to function as a power generation system S using a so-called undershot water turbine. Although only one blade 4 is shown in the attached drawings, it may be configured with two blades, which may be placed on the left and right sides of the bicycle 1.

[0020] <Bicycle> Bicycle 1 is a conventional bicycle 1 and includes a front wheel 10, a rear wheel 11, a saddle 12, left and right pedals 13, handlebars 14, cranks 15, a front gear 16, a rear gear 17, a chain 18, and a dynamo (not shown).

[0021] The crank 15 is connected to a front gear 16, and the rear wheel 11 is connected to a rear gear 17. The front gear 16 and the rear gear 17 are connected to a chain 18. As a result, when the crank 15 rotates, the front gear 16 rotates, which in turn rotates the rear wheel 11.

[0022] The dynamo is located adjacent to the rear wheel 11 and is configured to generate electricity through the rotation of the rear wheel 11. The type of dynamo is not particularly limited, and may be, for example, a hub dynamo located on the hub of the rear wheel 11, or a rim dynamo located adjacent to the rim of the rear wheel 11. If the dynamo is a rim dynamo, it is preferable that it be configured to generate electricity without contacting the rim so that power generation efficiency does not decrease even if the rim is wet. The dynamo may also be of a type that generates electricity by contacting the tire of the rear wheel 11. The bicycle 1 according to this embodiment only needs to be equipped with a dynamo that generates electricity when the rear wheel 11 rotates, and no special modifications are required for power generation.

[0023] <Blade> 1, the blade 4 includes a side wall 40, a peripheral wall 41, and a plurality of vanes 42, and is fixed to the crank 15. The number of vanes 42 is not particularly limited. The material of the blade 4 may be plastic or a rust-resistant metal such as aluminum or stainless steel.

[0024] FIG. 2 is a schematic perspective view showing an image of attachment of the blade 4, and FIG. 3 is a schematic side view showing the blade 4. As shown in FIGS. 2 and 3, the peripheral wall 41 protrudes from the side wall 40, and each vane 42 extends outward from the peripheral wall 41. As shown in FIG. 3, the side wall 40 is provided with a crank hole 40a through which the crank 15 passes. The side wall 40 is provided with a mark 40b to facilitate aligning the center of the crankshaft 150 and the center of the peripheral wall 41 on the same axis. As shown in FIG. 2, the blade 4 is fixed to the crank 15 with the center of the peripheral wall 41 and the crankshaft 150 arranged on the same axis.

[0025] 3 to 5, the blade 4 further includes a first holding portion 43 and a second holding portion 44. In this embodiment, the first holding portion 43 and the second holding portion 44 constitute the "fixed portion" of the present invention.

[0026] As shown in FIG. 4, the first holding portion 43 has a first support plate 430 , two first bolts 431 , and two first pressing plates 432 .

[0027] The first support plate 430 is fixed to the side wall 40 and is formed in a U-shape in plan view. However, the shape of the first support plate 430 is merely an example and is not limited to this. The first support plate 430 may also be fixed to the peripheral wall 41. Female threads for first bolts 431 are provided on the front and rear of the first support plate 430.

[0028] Two first bolts 431 are disposed in front of and behind the first support plate 430. The first bolt 431 is configured as a so-called adjustment bolt and has a swing mechanism, and the first pressing plate 432 is connected to the first bolt 431 so that its angle can be changed. The first pressing plate 432 is formed with an arc-shaped cross section to make it easier to hold the crank 15, but this is just one example, and it may be formed in a flat plate shape. In addition, an elastic material such as rubber (not shown) is disposed on the pressing side of the first pressing plate 432 to make it easier to hold the crank 15.

[0029] As shown in FIG. 6, the first holding portion 43 adjusts the distance between the front and rear first pressing plates 432 using the front and rear first bolts 431, thereby pressing the first pressing plates 432 against the crank 15 from the front and rear of the crank 15 and holding the crank 15.

[0030] As shown in FIG. 5, the second holding portion 44 has a second support plate 440, three second bolts 441, and left and right second pressing plates 442.

[0031] The second support plate 440 is fixed to the side wall 40 and is formed in a U-shape in plan view. However, the shape of the second support plate 440 is merely an example and is not limited to this. The second support plate 440 may also be fixed to the peripheral wall 41. Three female threads for second bolts 441 are provided on the outer wall of the second support plate 440.

[0032] The three second bolts 441 are arranged together on the outer wall of the second support plate 440. The second bolts 441 are configured as so-called adjustment bolts and have a swing mechanism, and the left and right second pressing plates 442 are respectively connected to the second bolts 441 so that the angle can be changed. At least the inner second pressing plate 442 is configured to be removable so that the pedals 13 and cranks 15 can be passed through. The left and right second pressing plates 442 are formed with an arc-shaped cross section to make it easier to hold the cranks 15, but this is just one example, and they may be formed in a flat plate shape. In addition, an elastic material such as rubber (not shown) is arranged on the pressing side of the second pressing plate 442 to make it easier to hold the cranks 15.

[0033] As shown in Figure 6, the second holding portion 44 adjusts the distance between the left and right second pressing plates 442 using the second bolts 441, thereby pressing the second pressing plates 442 against the crank 15 from the left and right of the crank 15 and holding the crank 15.

[0034] 7, the blade 4 is configured in a tub shape by a side wall 40 and a peripheral wall 41, and a first holding portion 43 and a second holding portion 44 are disposed inside the tub. By having the above configuration, the blade 4 is firmly fixed to the crank 15 while allowing the crank 15 to rotate.

[0035] <Fixing method> The method for fixing the blade 4 will now be described. First, the crank 15 is passed through the crank hole 40a in the peripheral wall 41, and the crank 15 is positioned inside the peripheral wall 41. Next, the blade 4 is fixed to the crank 15 by the first holding portion 43 and the second holding portion 44 in a state in which the center of the peripheral wall 41 and the crank shaft 150 are aligned on the same axis.

[0036] <Stand> As shown in Figure 1, the first stand 2 and the second stand 3 are disposed on the front wheel 10 and the rear wheel 11, respectively, to space the bicycle 1 from the ground, thereby making it easier to attach the blade 4.

[0037] <Power generation method> As shown in Figure 8, the first and second stands 2, 3 are positioned at a height that exposes the upper half of the blade 4 above the water surface and allows the lower vanes 42 of the blade 4 to receive water resistance. As a result, the blade 4 receives resistance from the water flowing from front to rear and rotates together with the crank 15, which in turn rotates the rear wheel 11 and causes the dynamo to generate electricity. Also, if the bicycle 1 is a gear-switchable bicycle, by switching gears, the weight that rotates the rear wheel 11 can be changed to an appropriate weight depending on the strength of the water current.

[0038] As described above, the power generation system S can generate electricity from the dynamo by rotating the rear wheel 11 with the flow of water. Therefore, the power generation system S can be effectively used for a long time as a temporary power source even in the event of a power outage due to a disaster.

[0039] The power generation system S and the blades 4 according to one embodiment of the present invention have been described above, but the present invention is not limited to the above embodiment. For example, the present invention may be implemented by the following modifications, or by combining the following modifications as appropriate.

[0040] <Modification> 9 to 11 are schematic diagrams showing a bracket 45 according to a modified example of the blade 4. As shown in FIGS. 9 to 11, the blade 4 may have a fixing portion configured by the bracket 45. In this case, the fixing portion has a first vertical plate 451, a second vertical plate 452, a shaft 453, a first screw 454, a first horizontal plate 455, a second horizontal plate 456, and a second screw 457. The first vertical plate 451 and the second vertical plate 452 correspond to the "vertical plates" of the present invention.

[0041] The first and second vertical plates 451, 452 have a plurality of screw holes (internal threads) for the first screws 454. The first screws 454 are disposed in the screw holes of the first and second vertical plates 451, 452. The first screws 454 may be, for example, adjustment bolts having a pressing portion at their tips, or may have tips that are swivelable. The first vertical plate 451 and the second vertical plate 452 are connected to each other or formed integrally with each other, and form a U-shape in plan view, as shown in FIGS. 9 and 10C . The bracket 45 surrounds the crank 15 with the first and second vertical plates 451, 452, and secures the crank 15 by pressing the tips of the first screws 454 against the crank 15. The first and second vertical plates 451, 452 have a plurality of screw holes on the top and bottom, which allows them to accommodate different lengths of crank 15 for each bicycle 1. The number of screw holes on the top and bottom of the first and second vertical plates 451, 452 is not particularly limited.

[0042] 9 and 10A, the first vertical plate 451 is trapezoidal and extends downward and outward in the left-right direction. The portion of the first vertical plate 451 that protrudes from the second vertical plate 452 corresponds to the "support portion" of the present invention.

[0043] The first and second horizontal plates 455, 456 have a plurality of screw holes (internal threads) for second screws 457. The second screws 457 are disposed in the screw holes of the first and second horizontal plates 455, 456. The first horizontal plate 455 is connected to or formed integrally with the support portion of the first vertical plate 451, and extends horizontally in the front-to-rear direction from the underside of the support portion. The bracket 45 secures the pedal 13 by tightening the second screws 457 while the pedal 13 is sandwiched between the first horizontal plate 455 and the second horizontal plate 456.

[0044] The shaft rod 453 extends outward in the left-right direction from the second vertical plate 452. The bracket 45 may have a plurality of shaft rods 453, for example, arranged vertically.

[0045] As shown in Figure 11, when the fixing part is formed by a bracket 45, the side wall 40 has a bracket hole 40c and an axle rod hole 40d instead of the crank hole 40a. The bracket hole 40c is formed by a slit extending vertically and slightly wider than the support part (first vertical plate 451) so that the support part can be inserted, and a square hole through which the pedal 13 and support part pass. The axle rod hole 40d is formed by a slit extending vertically and slightly wider than the axle rod 453. As a result, the front and rear support parts, first and second horizontal plates 455, 456, and pedal 13 pass through the bracket hole 40c, and the axle rod 453 passes through the axle rod hole 40d.

[0046] <Fixing method> Next, a method for fixing the blade 4 in the above-described modified example will be described. (1) Place the first horizontal plate 455 on the upper surface of the pedal 13, then place the second horizontal plate 456 on the lower surface of the pedal 13, and tighten the second screw 457 to fix the pedal 13 in place.

[0047] (2) Next, the crank 15 is fixed to the first and second vertical plates 451 and 452 by pressing the tips of the first screws 454 against the crank 15 located inside the first and second vertical plates 451 and 452 .

[0048] (3) Next, the front and rear support parts and the pedals 13 are inserted into the bracket holes 40c of the side wall 40, and the axle rod 453 is inserted into the axle rod hole 40d. This positions the center of the side wall 40 in the front-to-rear direction (X-axis direction) and the center of the crankshaft 150 in the front-to-rear direction. In addition, because the upper surface of the support part is inclined and the axle rod hole 40d extends vertically, the vertical center position of the bracket 45, i.e., the center position between the crankshaft 150 and the side wall 40, can be adjusted by sliding the side wall 40 left and right (Y-axis direction).

[0049] In the power generation system S, even in the above modification, as in the above embodiment, the blades 4 rotate together with the crank 15 due to the resistance of the water flowing from front to rear, thereby rotating the rear wheel 11 and causing the dynamo to generate electricity. In addition, the blades 4 have a plurality of shafts 453 on the bracket 45, which can strengthen the connection between the bracket 45 and the side wall 40.

[0050] Fig. 12 is a schematic side view showing blades 4 of a power generation system S according to another modification. As shown in Fig. 12, the blades 42 may be configured as blades 42 for a wind turbine. In this case, the power generation system S functions as a wind power generation system. Specifically, the power generation system S is configured such that the bicycle 1, to which the blades 4 are fixed, is installed so that the blades 4 face the wind, and the crank 15 rotates together with the blades 4 when the wind catches the blades 4, thereby rotating the rear wheel 11 and generating electricity from the dynamo. In this case, the bases of the first and second stands 2, 3 may be configured to be wide in the left-right direction to prevent the bicycle 1 from tipping over.

[0051] FIG. 13 is a schematic diagram showing yet another modified example. The power generation system S may further include a plurality of spoke blades 6 arranged on the spokes 112 of the rear wheel 11 and rotating the rear wheel 11 by receiving the water flow. In this case, as shown in FIG. 13A, the spoke blade 6 has, for example, a holding portion 60, a first plate member 61, a second plate member 62, and a fastening portion (not shown). The holding portion 60, the first plate member 61, and the second plate member 62 may be made of, for example, plastic or a rust-resistant metal such as aluminum or stainless steel. Furthermore, although the holding portion 60, the first plate member 61, and the second plate member 62 are integrally formed, this is merely an example, and they may also be formed separately.

[0052] The retaining portion 60 is formed with a slit in a tube, and has a generally C-shaped cross section. The longitudinal length of the retaining portion 60 is configured to be shorter than the length of the spokes 112. The spokes 112 pass through the slit, and the spokes 112 are placed in the hollow portion of the tube. The slit in the retaining portion 60 is configured to be able to shrink or close as the retaining portion 60 flexes. This allows the retaining portion 60 to hold the spoke blade 6 to the spoke 112.

[0053] The first plate members 61 extend radially outward from the longitudinal direction of the holding part 60. In this embodiment, the first plate members 61 are configured with three pieces, but this is merely an example and is not limiting. For example, the first plate members 61 may be configured with four or more pieces.

[0054] The length of the first plate member 61 in the short direction is configured to be a length that does not come into contact with the front fork, mudguard parts, etc. of the bicycle 1 when the rear wheel 11 rotates. The length of the first plate member 61 in the short direction does not have to be uniform along the longitudinal direction. For example, the length of the first plate member 61 in the short direction may be shorter the closer it is to the hub of the rear wheel 11 and longer the closer it is to the tire of the rear wheel 11. Furthermore, the length of the first plate member 61 in the longitudinal direction may be, for example, more than one-fifth and less than one-half the length of the spokes 112.

[0055] The two second plate members 62 extend outward from the longitudinal ends of the slit. The inner surfaces of the two second plate members 62 form guide portions that guide the spokes 112 into the hollow portion. As shown in Figure 13A, when the spokes 112 are passed through the guide portions in the direction of the arrows up to the holding portion 60, the two second plate members 62 are secured to each other by the securing portions in an overlapping state.

[0056] The fastening portion is formed of, for example, a hook-and-loop fastener, a screw, a clip, or a rubber band. When the fastening portion is formed of a hook-and-loop fastener, it is formed of a male hook-and-loop fastener provided on the inner surface of one of the second plate members 62 and a female hook-and-loop fastener provided on the inner surface of the other second plate member. In this case, there are no particular limitations on the size and number of the male hook-and-loop fasteners and the female hook-and-loop fasteners.

[0057] When the fastening portion is formed by a plurality of screws, the two second plate members 62 have a plurality of screw holes and are fastened by the plurality of screws while overlapping each other. When the fastening portion is formed by clips, the two second plate members 62 are fastened by one or more clips while overlapping each other. When the fastening portion is formed by rubber bands, the two second plate members 62 are fastened by wrapping one or more rubber bands around them while overlapping each other.

[0058] Figure 13B shows spoke blades 6 held on all spokes 112, but this is just one example; the number of blades 4 may be, for example, 6 to 12, and spoke blades 6 do not need to be placed on all spokes 112.

[0059] As shown in Figure 14, the power generation system S uses the first and second stands 2, 3 to hold the bicycle 1 with the spoke blades 6 so that the upper half of the rear wheel 11 is exposed above the water surface and at a height where the spoke blades 6 at the bottom of the rear wheel 11 are subjected to water resistance. As a result, the spoke blades 6 rotate the rear wheel 11 with the resistance of the water flowing from front to rear, and the power generation system S can rotate the rear wheel 11 more appropriately not only with the rotational force of the blades 4 but also with the rotational force of the spoke blades 6, thereby generating electricity efficiently. [Explanation of symbols]

[0060] S Power Generation System 1. Bicycle 10 Front wheels 11 Rear wheel 112 spokes 12 Saddle 13 Pedals 14 Handle 15 Crank 150 crankshaft 16 Front gear 17 rear gear 18 Chain 2. First Stand 3. Second Stand 4 blades 40 side wall 40a crank hole 40b mark 40c bracket hole 40d shaft hole 41 Peripheral wall 42 Feather 43 1st holding part 430 First Support Plate 431 First Bolt 432 First pressing plate 44 Second holding part 440 Second Support Plate 441 Second Bolt 442 Second pressing plate 45 Bracket (fixed part) 451 First vertical plate 452 Second Vertical Plate 453 Axial rod 454 First screw 455 First horizontal plate 456 Second horizontal plate 457 Second screw 6 spoke blades 60 Holding part 61 1st plate member 62 Second plate member

Claims

1. A bicycle power generation system having a rear wheel, left and right cranks for rotating the rear wheel, and a dynamo adjacent to the rear wheel that generates electricity through the rotation of the rear wheel, Equipped with a blade, The blade is The surrounding wall and a fixing portion that is fixed to the crank together with the peripheral wall on the inside of the peripheral wall in a state where the center of the peripheral wall and the crankshaft are arranged on the same axis; a plurality of blades extending outward from the peripheral wall; A power generation system in which the blades receive water flow or wind, causing the peripheral wall to rotate together with the crank, thereby rotating the rear wheel and causing the dynamo to generate electricity.

2. a plurality of spoke blades connected to each spoke of the rear wheel; 2. The power generation system according to claim 1, further comprising: a stand that exposes upper halves of the rear wheels from the water surface and is at a height where a lower part of the rear wheels receives water resistance, and that exposes upper halves of the peripheral wall from the water surface and is at a height where a lower part of the peripheral wall receives water resistance.

3. A blade used in a bicycle power generation system having a rear wheel, left and right cranks for rotating the rear wheel, and a dynamo adjacent to the rear wheel that generates electricity by the rotation of the rear wheel, The surrounding wall and a fixing portion that is fixed to the crank together with the peripheral wall on the inner side of the peripheral wall in a state in which the center of the peripheral wall and the crankshaft are arranged on the same axis; a plurality of blades extending outward from the peripheral wall; The blade receives water current or wind, causing the peripheral wall to rotate together with the crank, thereby rotating the rear wheel and causing the dynamo to generate electricity.

4. The fixing portion is a first holding portion that holds an upper portion or a lower portion of the crank from the left and right direction; The blade according to claim 3 , further comprising: a second holding portion that holds an upper portion or a lower portion of the crank from the front-rear direction.

5. a side wall having holes through which the crank and the bicycle pedals pass; The peripheral wall projects from the side wall, The blade of claim 3 , wherein the fixed portion is fixed to the side wall.

6. The fixing portion is a vertical plate having a plurality of screw holes and surrounding the crank; a first screw; The blade according to claim 3 , wherein the crank is fixed by surrounding the crank with a plurality of the vertical plates and pressing tips of the first screws disposed in screw holes of the vertical plates against the crank.

7. The fixing portion is a support portion extending outward in the left-right direction from the vertical plate; a first horizontal plate having a plurality of screw holes and fixed to the support portion, the first horizontal plate extending in a horizontal direction; a second horizontal plate having a plurality of screw holes; a second screw; 7. The blade of claim 6, wherein the bicycle pedal is fixed by clamping the bicycle pedal between the first horizontal plate and the second horizontal plate and connecting the first horizontal plate to the second horizontal plate with the second screw.

8. A method for generating electricity for a bicycle having a rear wheel, left and right cranks for rotating the rear wheel, and a dynamo adjacent to the rear wheel that generates electricity by the rotation of the rear wheel, comprising: a blade including a peripheral wall, a fixing portion disposed inside the peripheral wall, and a plurality of vanes extending outward from the peripheral wall, and fixed to the crank by the fixing portion in a state in which the center of the peripheral wall and the crank shaft are disposed on the same axis; and rotating the blade together with the crank by subjecting the blade to a water current or wind, thereby rotating the rear wheel and causing the dynamo to generate electricity.

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