JPH07187042A - Magnetic driver and bicycle using it - Google Patents

Abstract

PURPOSE:To provide a magnetic driver, which operates on an utterly new principle without needing power or with small power, and a bicycle making use of this. CONSTITUTION:This is equipped with a rotor 2, which is born with a bearing 1, the first permanent magnet 3, which is arranged coaxially on the face of this rotor 2, a bearing means 5, which supports the rotary shaft 4 crossing on two levels one part of the locus of the rotational shifting of the first permanent magnet 3 rotating together with the rotor 2 rotatably in radial direction of the rotor 2, and the second permanent magnet 6, which is fixed to the rotary shaft 4 in the vicinity of this permanent magnet besides being on the locus of the rotational shifting of the first permanent magnet 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic drive device capable of rotationally driving a rotating body or the like by skillfully combining two types of magnets and switching the magnetic poles of one magnet, and a bicycle using the same. Is a thing

[0002]

2. Description of the Related Art Motors are often used with internal combustion engines as a basic power source for various vehicles and various machines used in daily life. As is well known, this motor utilizes electromagnetic force, and is designed to be operated by passing a current through a coil.

[0003]

However, such a motor is naturally operated by receiving the supply of electric power from a power source. Therefore, in order to operate a motor having a large torque, for example, However, since a large amount of current or voltage is required, a commercial power source, a generator, a heavy battery having a large capacity, or the like is required. Therefore, in view of the above circumstances, the present invention does not particularly require electric power,
Alternatively, it is an object of the present invention to provide a magnetic drive device that can generate a relatively large torque without requiring a particularly large electric power, and that operates on a completely new principle, and a bicycle using the same.

[0004]

That is, according to the invention described in claim 1, a rotating body rotatably arranged around a rotating shaft, and a heterogeneous pole on at least one surface of the rotating body. The plurality of first permanent magnets, which are concentrically arranged so that the magnetic poles are adjacent to each other, and the rotation axis that intersects with a part of the rotational movement trajectory of the first permanent magnet that rotates together with the rotating body A shaft supporting unit that rotatably supports along the radial direction of the body, and a second shaft fixed on the rotary shaft near the first permanent magnet on the rotational movement locus of the first permanent magnet. A permanent magnet is provided, and one of the rotating body and the rotating shaft is rotationally driven by the rotating operation of the rotating body or the rotating shaft.

According to the second aspect of the present invention, the rotating body rotatably arranged about the rotating shaft and the magnetic poles having different polarities are adjacent to each other on at least one surface of the rotating body. A plurality of concentric permanent magnets and an electromagnet fixed near the permanent magnet on the rotational movement locus of the permanent magnet are provided, and the rotor is rotated by continuously switching the polarities of the electromagnet. It is configured to be driven.

According to the third aspect of the present invention, a magnetic drive device is provided on the rear wheels, and the drive torque of the magnetic drive device is utilized together with the torque generated by pedaling with the foot of the user. In the constructed bicycle, the rear wheel of the bicycle is configured as a rotating body of the magnetic drive device, and a first permanent magnet is disposed on an outer peripheral edge side of at least one surface of the rotating body. A second permanent magnet is rotatably attached on the rotational movement locus of the vehicle and on the frame side of the bicycle in the vicinity of the first permanent magnet, and the main sprocket rotates integrally with the pedal, and is configured as the rotating body. A drive sprocket that meshes with a chain that connects a rear sprocket that rotates integrally with the rear wheel of the bicycle is attached to the frame side of the bicycle, and the rotational force of the drive sprocket is set to the second permanent magnet. A flexible wire to transmit to those mounted between these drive sprocket and the second permanent magnet.

According to the fourth aspect of the present invention, a magnetic drive device is provided on the rear wheels, and the magnetic drive torque of the magnetic drive device is used together with the mechanical torque generated by pedaling with a foot. In the bicycle, the rear wheel of the bicycle is configured as a rotating body of the magnetic drive device, and a permanent magnet is arranged on the outer peripheral edge side of at least one surface of the rotating body, and on the rotational movement locus of the permanent magnet, An electromagnet is arranged near the permanent magnet on the side of the frame of the bicycle to detect the rotation speed of any of the rotating parts that rotate during traveling of the bicycle and adjust the polarity switching speed of the electromagnet based on this rotation speed. A speed adjusting means is provided, and the traveling speed of the bicycle is controlled by operating the speed adjusting means.

In the invention according to claim 5, the speed adjusting means detects the rotational speed of either the rear wheel, the front wheel, the sprocket rotating integrally with the pedal, or the operating plate rotating integrally with the rear wheel. The polarity switching speed is adjusted based on this rotation speed.

[0009]

According to the present invention, the magnetic field is changed by rotating either the rotating body or the rotating shaft, or the magnetic field is changed by switching the direction of the current flowing through the coil. The permanent magnets that face the permanent magnets are attracted as a result of the change of, and thereby the rotary body or the rear wheels can be driven to rotate.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing the principle of a magnetic drive apparatus according to a first embodiment of the present invention. This magnetic drive apparatus has a rotor 2 axially supported by a bearing 1 and a rotor 2. First permanent magnets 3 concentrically arranged on the surface of the
And a shaft support means 5 for rotatably supporting a rotary shaft 4 which intersects with a part of the rotational movement locus of the first permanent magnet 3 rotating with the rotary body 2 in a radial direction of the rotary body 2, A second permanent magnet 6 fixed to the rotary shaft 4 is provided on the rotational movement locus of the permanent magnet 3 and near the first permanent magnet.

The rotating body 2 has a rotating shaft 21 fixed to the central portion of the lower surface thereof, and is supported by the bearing 1 in a rotation-free state. A plurality of the first permanent magnets 3 are concentrically arranged so that magnetic poles having different polarities are adjacent to each other. Although the first permanent magnet 3 of this embodiment is fixed only to the upper surface of the rotating body 2, the first permanent magnet 3 is not particularly limited to this embodiment, and the rotating body 2 is attached to the first permanent magnet 3 to attach it. The second permanent magnet 6 may be rotated at the same time on the opposite surface side by the same mechanism, and in this case, a larger rotational force can be generated.

Although the shaft support means 5 are arranged on both sides of the rotary body 2 as shown in FIG. 2, it is also possible to support the second permanent magnet 6 rotatably by only one of them, as shown in FIG. The second permanent magnets 6 are formed to have a constant size and shape in accordance with the arrangement intervals with the respective first permanent magnets 3. For example, when the number of the first permanent magnets 3 is N, this second permanent magnet 6 is The front and back surfaces of the second permanent magnet 6 attract the first permanent magnet 3 respectively, so that the rotating shaft 4 to which the second permanent magnet 6 is attached is
The rotating body 2 rotates once every 1/2 rotation. It is preferable that the first and second permanent magnets generate a magnetic field as strong as possible.

Therefore, according to this embodiment, for example, if the rotating shaft 4 is rotated N times, the rotating body 2 can be rotated twice as much as 2N times, and as a rotating means of the rotating shaft 4, of course. Not only manual operation but also various means are possible.

Next, another magnetic drive device according to claim 2 of the present invention will be described. FIG. 3 is a principle diagram of the magnetic drive apparatus according to the second embodiment. This magnetic drive apparatus uses an electromagnet 6'in place of the second permanent magnet in the magnetic drive apparatus of the first embodiment. The polarity of the magnetic field is converted by a switching unit that switches the energizing direction of the current flowing through the coil forming the electromagnet 6'at a specific cycle by an appropriate unit.

Next, a bicycle to which the magnetic drive device according to claim 1 of the present invention is applied will be described. FIG. 4 is a side view showing a bicycle according to the present invention. This bicycle has a plurality of first permanent magnets (hereinafter referred to as fixed magnets) 31 concentrically arranged on a rear wheel 22 of a bicycle which is a rotating body. The motor 7 mounted on the rotational movement path of the fixed magnet 31 and on the frame side of the bicycle near the fixed magnet 31.
(See FIG. 4), a second permanent magnet (hereinafter referred to as a rotary magnet) 61 (see FIG. 4) connected to the output shaft 71 side of the motor 7, the main sprocket 9A and the rear wheel 22 that rotate with the pedal 8. A drive sprocket 9C that meshes with a chain 10 that is connected to a sub sprocket 9B that rotates integrally with the drive sprocket 9C, and a flexible wire 11 (see FIG. 5) that transmits the rotational force of the drive sprocket 9C to the rotary magnet 61.

The fixed magnets 31 are N in number at equal intervals along the outer peripheral edge of the rear wheel 22 (for example, in this embodiment, 36 permanent magnets each generating a magnetic force of about several thousand gauss to the rear wheel of 26 inches). ) Is disposed, and is rotated integrally with the rear wheel 22 with a very small distance from the rotary magnet 61.
It is preferable that the fixed magnet is attached to the rear wheel as close to the peripheral edge as possible, and the driving force is effectively increased by increasing the moment of inertia.

As shown in FIG. 5, the rotary magnet 61 is fixed to an intermediate portion of the shafts 13A and 13B rotatably mounted on the bracket 12 for fixing the motor 7. A first gear 14A and a second gear 14B, which have the same number of teeth and mesh with each other, are fixed to the shafts 13A and 13B, of which the first gear 13A is fixed to the output shaft 71 of the motor 7. Drive gear 7
It is designed to mesh with 1A. Then, of the rotary magnets 61, those on both sides corresponding to the same fixed magnet 31 are fixed to the respective shafts 13A and 13B with the magnetic poles on the side facing the fixed magnet 31 being different as shown in FIG. Has been done.

The motor 7 is housed in the drive box 15 and is operated by electric power supplied from a battery (not shown) attached to the frame of the bicycle or the like, but is not limited to this. The power may be supplied by a generator attached to, for example. Although the motor 7 is added in this embodiment, it is not particularly necessary, and it is of course possible that the bracket drive shaft is rotatably supported and the drive shaft and the flexible wire are directly connected. is there.

The drive sprocket 9C takes in the rotational force of the main sprocket 9A generated by the operator pedaling with the pedal 8 through the chain 10 and utilizes the rotating operation of the flexible wire 11 to output the output shaft 71 of the motor 7. It is designed to be transmitted to.

The main sprocket 9A and the sub sprocket 9B which rotates integrally with the rear wheel 22 may be the same as the conventional one, but the sub sprocket 9B is particularly the rear wheel 22.
However, when the rear wheel 22 has a rotational speed higher than that of the sub sprocket 9B, the rear sprocket 9B is provided with an appropriate clutch mechanism (not shown) (or various mechanisms that achieve the same effect). The turning force to 22 is cut off so that the braking force is not applied. Also, the output shaft 71 of the motor 7
A similar clutch mechanism (not shown) (or various mechanisms that achieve the same effect) is also provided between the rear wheel 2 and the motor 7.
When the rotation speed of No. 2 is higher than that of the rotating magnet 61, the rotation operation of the output shaft 71 can be cut off. The flexible wire 11 is used for protection and the like.
It is inserted inside the bendable tube 11A.

Therefore, according to this embodiment, when the operator pedals with the pedal 8, the main sprocket 9A rotates in FIG. 6, and the rotation of the main sprocket 9A causes the main sprocket 9A to rotate along with the rear wheel 22 via the chain 10. Sprocket 9B starts to rotate. This causes the bicycle to start moving, but the rotating sprocket chain 9 drives the sprocket 9
C transmits the rotating force, and the rotating force transmits the flexible wire 11
Is transmitted to the output shaft 71 of the motor 7 via.

As a result, from the output shaft 71 to the drive gear 7
By the rotational force transmitted to the rotary magnet 61 via the 1A, the first gear 14A and the second gear 14B, the rotary magnet 61
Rotates, but the fixed magnet 31 magnetically attracted and guided by the rotating operation of the rotating magnet 61 rotates, so that the rotation / driving force to the rear wheel 22 increases.

For example, the numbers of gears of the main sprocket 9A, the subsidiary sprocket 9B, and the drive sprocket 9C are A, B, and C (however, A>B> C), and the drive gear 71A.
When the number of gears of the first gear 14A and the second gear 14B is D, E, E (however, E> D), when the pedal 8 (main sprocket 9A) is rotated once within a fixed time,
The secondary sprocket 9B (rear wheel 22) rotates A / B (> 1). Further, the drive sprocket 9C is A / C (> A /
Since B> 1), the first gear 14A and the second gear 14B that are transmitted through the motor 7 side and rotate are (A /
C) ・ Rotate by (D / E).

Therefore, the rotary magnet 61 through the motor 7 side
The number of rotations of the rear wheel 22 due to the rotation of 2 is twice that, that is, 2 · (A / C) · (D / E). Therefore, when the following condition, 2 · (A / C) · (D / E)> (A / B), the clutch mechanism on the motor 7 side does not operate, and the rotational force is transmitted via the flexible wire 11 to the motor 7 Is transmitted to the output shaft 71. As a result, the rotating magnet 61 rotates and is attracted and driven by the rotating magnet 61, and the rear wheel 22 is driven as the fixed magnet 31 rotates. At this time, the rotational force from the secondary sprocket 9B is faster than the rotational speed of the rear wheel 22, so the clutch mechanism is activated at that time and is not transmitted to the rear wheel 22.

When the motor 7 is operated by operating a switch (not shown) along with this, the driving force is further increased, and the rotational speed of the rear wheel 22 is further increased. In addition,
Although this embodiment is applied to a bicycle, it can be applied to, for example, a wheelchair and various other things.

FIG. 7 shows another bicycle to which the magnetic drive device according to the present invention is applied.
In order to perform a magnetic drive operation in addition to the mechanical drive operation by the pedal, an electromagnet 60A (see FIG. 8) that acts on the permanent magnet 31 fixed to the rear wheel 22 and a polarity conversion means 60B (see FIG. 8) are provided. There is.

As shown in FIG. 8, the electromagnet 60A includes a battery 62 that can be repeatedly recharged and a battery 6 that can be repeatedly recharged.
The waveform converter 63 for converting a direct current (signal) from the second into an alternating current (signal) of a predetermined proper frequency, and a left and right hand side which are arranged to face the permanent magnets 31 on both sides of the rear wheel 22 as shown in FIG. It is composed of four first coils 64A to fourth coils 64D.

As shown in FIG. 9, the battery 62 is housed in a housing 60C (see FIGS. 7 and 9) fixed to a part of the frame of the bicycle so as to sandwich the rear wheel 22. Power is supplied to the coils 64A to 64D.

The waveform converting section 63 converts a direct current (signal) from the battery 62 into an alternating current (signal) having a predetermined frequency and supplies power to the first coil 64A to the fourth coil 64D, which will be described later. An inverter controlled by the control unit 66 is used.

First coil 64A to fourth coil 64D
Are wound in large numbers so that a large magnetic force can be generated. In this embodiment, a magnetic force of about 500 gauss is generated, but a magnetic force as large as possible, for example, about 10,000 gauss is generated. It is preferable that the number of turns of the winding is as large as possible.

Further, these coils 64A to 64D are
As shown in FIG. 10, the rear wheels 22 on the same surface side have winding directions opposite to each other, and magnetic forces of opposite polarities are generated at the same time. Further, the coils on both sides of the rear wheel 22 facing each other are also adapted to generate magnetic forces of opposite polarities at the same time, so that all the coils on both sides of the wheel 22 are permanent on the wheel 22 side. It is configured to attract the magnet 31. The number of coils is not particularly limited to four, and more coils may be used.

The waveform converting means 60B forms a speed adjusting means, and as shown in FIG. 8, it is composed of a rotational speed detecting section 65 provided on the main sprocket 9A and a control section 66, and has an electromagnet. The polarity switching time of the magnetic field generated by 60A is automatically changed and adjusted according to the traveling speed of the bicycle.

In this embodiment, as shown in FIG. 11, the rotation speed detecting portion 65 includes a substantially ring-shaped reflecting plate 65A concentrically provided on the main sprocket 9A at regular intervals, and a moving region of the reflecting plate 65A. It is configured by a light emitting portion 65B provided in the vicinity, and a light receiving portion 65C that inputs the detection light emitted from the light emitting portion 65B and reflected by the reflection plate 65B and outputs a detection signal to the control portion 66.

In this embodiment, the optical means using the reflection plate is used as the rotation speed detecting portion, but it is not limited to this. For example, the main sprocket is provided with through holes at regular intervals, and the through holes are formed. It may be configured to detect light passing through. Also, using a magnetic sensor in this rotation speed detection unit, or without further providing this rotation speed detection unit,
A timer may be used to allow the operator to manually set and adjust as appropriate.

When the detection signal output from the light receiving unit 65C is input, the control unit 66 inputs the detection signal output from the rotation speed detection unit 65 according to the rotation speed of the main sprocket 9A (that is, the traveling speed of the bicycle). An appropriate control signal is output to the waveform conversion unit 63 according to the change in the time interval. That is, for example, when the traveling speed of the bicycle increases, the control unit 66 detects this increase in speed based on the detection signal from the rotation speed detection unit 65, and the waveform conversion unit 63 adjusts to this by a predetermined frequency (for example, the main sprocket). A control signal is output to the waveform conversion unit 63 so as to generate an alternating current (signal) having a frequency F corresponding to an angular velocity ω ₂ slightly larger than the angular velocity ω _{1 of} 9 A, that is, F = ω ₂ / 2π, and the magnetic field is generated. The frequency automatic control is performed so as to shorten the polarity change time interval.

The control unit is provided with an arithmetic means for detecting a change in speed (rotation of the main sprocket) per unit time, thereby detecting the acceleration at each time,
The polarity change time interval may be automatically adjusted appropriately from the change in the acceleration. Further, an operation means may be attached to the control unit, and an operator may manually operate the operation means to appropriately set / adjust a desired polarity change time interval.

Therefore, according to this embodiment, a large magnetic force can be obtained by increasing the number of turns of the first coil 64A to the fourth coil 64D without requiring a particularly large and heavy battery having a large capacity. Since it can be generated in the coil, it is possible to reduce the weight of the bicycle, and it is possible to obtain a bicycle with even better driving efficiency.

FIG. 12 shows a magnetic drive portion of a rear wheel of another bicycle to which the magnetic drive device according to the present invention is applied. This bicycle has a magnetic drive operation in addition to a mechanical drive operation by a pedal. For this purpose, an electromagnet 60A '(see FIG. 13) acting on the permanent magnet 31 fixed to the rear wheel 22 and a speed adjusting means 67 are provided.

The electromagnet 60A 'includes a battery 62 and four first coils 64A to 64A similar to those of the previous embodiment.
The coil 64D and the coil 64D are arranged to face the fixed magnet 31 provided near the outer peripheral edge of the rear wheel 22 '.

The speed adjusting means 67 engages with the through hole 68A of the actuating plate 68 fixed to one surface of the rear wheel 22 'on the center side and repeats the on / off operation by a pair of microswitches 69A, 69.
B is used. These micro switches 69
A and 69B are designed so that when one of them turns on, the other turns off, so that the flow of current that is passed through the first coil 64A to the fourth coil 64D when one of the microswitches turns on. Can be automatically switched, and the switching time is
It can be automatically adjusted according to the rotation speed of 2 ', and thus the traveling speed of the bicycle.

Further, a control unit (not shown) is provided in the speed adjusting means, and control is performed by the control unit to switch the energizing operation to the coil at a frequency corresponding to the switching speed slightly faster than the detected rotation speed. However, in this case, the acceleration during traveling can be increased more efficiently.

As shown in FIG. 14, the operating plate 68 has the same number of through holes 68A as the fixed magnets 31 in a positional relationship corresponding to the installation position of the fixed magnets 31 of the rear wheel 22 '. As shown in FIG. 12, both of the microswitches 69 are connected to the same through hole 68A of any one of the through holes 68A.
The operating portions of A and 69B are adapted to be fitted and engaged at the same time.

The microswitches 69A and 69B are shown in FIG.
As shown in FIG. 5, the circuit between the battery 62 and the first coil 64A to the fourth coil 64D is configured to be alternately connected, and one microswitch 69 is provided.
When the A and 69B are turned on, the battery 62 is controlled so that a current in a direction opposite to that at the immediately preceding on operation, that is, the other micro switch is turned on.
Is connected with.

Therefore, according to this embodiment, the traveling speed of the bicycle can be changed by the speed adjusting means 67 having an extremely simple structure as well as the magnetic drive operation of the rear wheel by the electromagnet, so that the cost can be reduced economically. . According to this embodiment, the microswitches 69A and 69B are connected to the rear wheel 2.
By installing the 2'towards the center as much as possible, the rear wheel 2
The peripheral speed of the operating plate 68 can be reduced during 2'rotation, whereby the impact when the operating parts of the microswitches 69A and 69B come into contact with the end of the through hole 68A can be reduced as much as possible. It is possible to improve the sex.

[0045]

As described above, this claim 1
According to the invention of claim 1, by rotating the rotating body or the rotating shaft, a change in the magnetic field is generated,
The first or second permanent magnet is attracted according to the change of the magnetic field, and thereby either the rotating body or the other of the rotating shafts is driven to rotate, and the configuration is extremely simple. It can be applied to a wide range of fields and requires no electric power, so that it can be easily used outdoors.

Further, according to the invention of claim 4,
By using a coil with an increased number of turns,
In particular, since a large magnetic field, in other words, a large driving force can be obtained without requiring a large capacity battery, a lightweight bicycle with a magnetic drive device can be realized, which results in better driving efficiency and even acceleration. An efficient and high-performance bicycle can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing the principle of a magnetic force driving device according to the present invention.

FIG. 2 is a cross-sectional view showing a modified example of a rotation mechanism of a second permanent magnet of the same device.

FIG. 3 is a perspective view showing the principle of another magnetic force driving device according to the present invention.

FIG. 4 is a side view showing a bicycle to which the magnetic force driving device according to the present invention is applied.

5 is an explanatory view showing a main part of the bicycle shown in FIG.

6 is a block diagram showing a configuration of a drive portion of the bicycle shown in FIG.

FIG. 7 is a side view showing a bicycle to which another magnetic force driving device according to the present invention is applied.

8 is a block diagram showing a configuration of a driving portion of an electromagnet of the bicycle shown in FIG.

9 is an explanatory view showing a main part of a drive portion of the bicycle shown in FIG. 7.

10 is an explanatory diagram showing the arrangement of coils in the drive portion of the bicycle rear wheel shown in FIG. 7. FIG.

11 is a cross-sectional view showing a rotation speed detection unit of the bicycle shown in FIG.

FIG. 12 is a side view showing a rear wheel of a bicycle to which another magnetic force driving device according to the present invention is applied.

FIG. 13 is a configuration block diagram showing still another magnetic force driving device according to the present invention.

FIG. 14 is a schematic plan view showing a rear wheel to which an operating plate used in still another magnetic force driving device according to the present invention is attached.

FIG. 15 is a block diagram showing an electrical connection of still another magnetic force driving device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bearing 2 Rotating body 3 First permanent magnet 4 Rotating shaft 5 Shaft supporting means 6 Second permanent magnet 22, 22 'Rear wheel 6', 60A, 60A 'Electromagnet 60B Polarity converting means 62 Battery 64A to 64D Coil

Claims (5)

[Claims] 1. A rotating body rotatably arranged around a rotating shaft, and a plurality of concentric magnetic poles of different polarities arranged adjacent to each other on at least one surface of the rotating body. A permanent magnet, and a shaft support means for rotatably supporting a rotary shaft that intersects with a part of the rotational movement locus of the first permanent magnet that rotates together with the rotary body in a radial direction of the rotary body. , On the rotational movement locus of the first permanent magnet,
A second permanent magnet fixed to the rotating shaft near the permanent magnet of the rotating body, and rotating either the rotating body or the rotating shaft by rotating the rotating body or the rotating shaft. A magnetic drive device characterized by being configured to drive. 2. A rotating body rotatably arranged about a rotating shaft, and a plurality of permanent magnets having concentric magnetic poles arranged adjacent to each other on at least one surface of the rotating body. A magnet and an electromagnet fixed to the vicinity of the permanent magnet on the rotational movement locus of the permanent magnet are provided, and the rotary body is rotationally driven by continuously switching the polarity of the electromagnet. Characteristic magnetic drive device. 3. A bicycle having a magnetic drive device on a rear wheel and configured to utilize the drive rotational force of the magnetic drive device together with the rotational force generated by pedaling with a foot of a user. A rear wheel is configured as a rotating body of the magnetic drive device, and a first permanent magnet is disposed on the outer peripheral edge side of at least one surface of the rotating body, on a rotational movement locus of the first permanent magnet, and A second permanent magnet is rotatably attached to the frame side of the bicycle near the first permanent magnet to rotate integrally with the main sprocket that rotates integrally with the pedal and the rear wheel of the bicycle configured as the rotating body. A drive sprocket that engages with a chain that is connected to a sub sprocket is attached to the frame side of the bicycle, and a flexible wire that transmits the rotational force of the drive sprocket to the second permanent magnet. A bicycle which utilizes a magnetic drive according to claim 1, characterized in that mounted between these drive sprocket and the second permanent magnet. 4. A bicycle comprising a magnetic drive device on a rear wheel, wherein the magnetic drive torque of the magnetic drive device is utilized together with the mechanical torque generated by pedaling with a foot. The rear wheel is configured as a rotating body of the magnetic drive device, and a permanent magnet is arranged on the outer peripheral edge side of at least one surface of the rotating body, and on the rotational movement locus of the permanent magnet and in the vicinity of the permanent magnet. An electromagnet is arranged on the frame side of the bicycle, and a speed adjusting means is provided for detecting the rotational speed of any of the rotating parts that rotate during traveling of the bicycle and adjusting the polarity switching speed of the electromagnet based on this rotational speed. The bicycle using the magnetic drive apparatus according to claim 2, wherein the bicycle is configured to control the traveling speed of the bicycle by operating the adjusting means. 5. A speed adjusting means detects the rotational speed of any one of a rear wheel, a front wheel, a sprocket that rotates integrally with a pedal, or an operating plate that rotates integrally with the rear wheel, and switches polarities based on this rotational speed. The bicycle using the magnetic drive device according to claim 4, wherein the bicycle is configured to adjust a speed.