JP2021062640A - Electric bicycle capable of traveling through self-charging - Google Patents

Abstract

To provide an electric bicycle that can travel through self-charging, offers the maximum mileage close to infinity, requires a lighter pedal effort than an ordinary bicycle does, gives a sense of driving analogous to that of a power-assisted bicycle, and can travel on public roads without a license.SOLUTION: The rotation of a crankshaft is transmitted to an alternator for the purpose of electricity generation. The direct-current output power is stored in a secondary battery, and concurrently fed to a hub motor of a drive wheel via speed control means. The number of rotations of the hub motor is changed in various shift modes on the basis of the number of rotations of the crankshaft, whereby traveling speed control is implemented. The secondary battery is charged by the alternator during power traveling, and charged with regenerative electric power fed from the hub motor during inertial traveling. When a voltage drop is anticipated because of frequent start and halt over a short period of time, a bicycle stand may be raised and a pedal may be pushed for self-charging. When it takes much time to fully charge the secondary battery, the secondary battery may be detached and charged using a dedicated charger outdoors.SELECTED DRAWING: Figure 1

Description

Technical fields related to electric bicycles

Patent Documents 1 and 2 are typical examples of electrically power assisted bicycles that have been widely used in recent years, and their commercial value is high including application to child-carrying bicycles, but the only difficulty is that the secondary battery is removed from the bicycle body. It has to be charged, and the maximum mileage on a single charge is only tens of kilometers. Furthermore, the mechanical structure must be complicated in order to satisfy the definition of "electrically assisted bicycle" stipulated by the Road Traffic Act.

The present invention has been devised in view of these problems. Since the vehicle travels by self-charging, the mileage is close to infinity, and the speed control logically eliminates the need for a chain or an assist drive unit. This has the advantage that the mechanical structure is simplified and the pedaling force is as light as that of an electrically power assisted bicycle.

Japanese Patent Application Laid-Open No. 2013-209007 Electric Assisted Bicycle Japanese Patent Application Laid-Open No. 2019-123476 Electric bicycle and its control method Japanese Patent Application 2018-207940 Bicycle with infant seat

Not applicable

An electric bicycle that can run on a self-charge, has an almost infinite maximum mileage, has a lighter pedaling force than a normal bicycle, gives a driving feeling similar to an electrically assisted bicycle, and can run on public roads without a license.

The rotation of the crankshaft is transmitted to the alternator to generate electricity, and the DC output power is stored in the secondary battery and at the same time supplied to the hub motor of the drive wheels via the speed control means, and various speed changes are performed based on the rotation speed of the crankshaft. The running speed is controlled by changing the rotation speed of the hub motor in the mode. The secondary battery is charged by the alternator during power driving and by the regenerative power from the hub motor during coasting, but there is concern that the voltage will drop due to frequent start and stop in a short time. In some cases, you can stop, stand up and pedal to self-charge. If it takes time to fully charge, it is possible to remove the secondary battery and charge it indoors with a dedicated charger.

While the mileage of a general electrically power assisted bicycle is several tens of kilometers, the electric bicycle of the present invention has a major feature that the mileage is close to infinity because it travels by self-charging. Since the hub motor is used to drive the drive wheels, the chain can be omitted, and shifting is performed logically, so the mechanical structure is simplified compared to the current electrically power assisted bicycles and fully electric bicycles. Since various shift modes can be set for running speed control based on the number of revolutions of the crankshaft, various driving forces can be obtained with a light pedaling force, and an effect similar to that of an electrically power assisted bicycle can be obtained. If there is a concern that the voltage of the secondary battery will drop, the alternator can be self-charged by stopping the vehicle, standing the stand and pedaling.

Basic configuration Start pushbutton switch and speed control conceptual diagram Basic configuration of electrical system

A typical adult bicycle has a tire diameter of 0.66 m and a gear ratio of chain wheels to rear wheel gears of 2.285, so the crankshaft speed required to run at 10 km / h is 10x1000 / 0. It is .66x3.14x2.285x60 = 35 rpm. Based on this result, the basic configuration of the present invention is an electric bicycle in which the crankshaft rotation speed reaches 10 km / h at 35 rpm and the pedaling force is lighter than that of a normal bicycle.

FIG. 1 shows the basic configuration of the present invention. Reference numeral 101 denotes a self-excited alternator, and the rotation of the crankshaft 103 is transmitted through the gearbox 102 to generate electricity. In order to reduce the load on the secondary battery 104, the secondary battery 104 is not used as the exciting power source for the rotor, but is excited by a DC generator with a built-in alternator, and the magnetic force is controlled to respond to the lightness of the load. The terminal voltage is kept constant by outputting the voltage and supplying an appropriate charging current to the secondary battery 104.

The gear box 102 includes a transmission gear that multiplies the rotation speed of the crankshaft 103 by n times and transmits the rotation speed to the alternator 101, and a ratchet gear that prevents the alternator 101 from rotating in the reverse direction.

The gear ratio n of the transmission gear is for shifting the rotation speed of the crankshaft 103 to the rotation speed required by the alternator 101. Furthermore, the load on the pedal 108, which is proportional to the load of the alternator 101, is specified by the Ministry of Land, Infrastructure, Transport and Tourism for the "electrically assisted bicycle" and the assist ratio by electric motor support (up to 1: 2, 24 km / h). It is also for physically adjusting so that it is in the range of 1 to 0), which is a linear decrease from 1 to 2 to 0.

When the gear ratio n alone is insufficient to satisfy this condition, the pedaling force control means 310 (FIG. 3) connects a parallel resistor to the alternator 101 to adjust the value, and increases the load to increase the load of the pedal 108. The required load is added to the bicycle, and the relationship between "pedal pedaling force" and "speed" is set to be equivalent to that of a general electrically power assisted bicycle.

Considering the burden on the driver, it is better that the pedaling force is light, but this is a measure that is considered necessary to enable driving on public roads that do not require a license. If the current regulations are revised so that the electric bicycle of the present invention is a new category of bicycle that does not require a license, these measures may be simplified.

In order to reduce the excessive current consumption of the hub motor 105 at the time of starting (starting) as much as possible and reduce the load on the secondary battery 104, the hub motor 105 uses a gear reduction type hub motor having a built-in reduction gear.

Reference numeral 104 denotes a secondary battery such as a lithium ion battery, which is housed in the battery case 120 and locked by the battery case key 119 shared with the power key. When it is necessary to charge from the outside, it can be removed from the battery case 120 and charged with a dedicated charger. The battery case 120 contains a control means 121 that collectively includes a start control means, a speed control means, a pedaling force control means, a regenerative brake control means, a runaway start suppression means, and the like.

The 116 is a power key switch, which can be changed according to the product specifications, from the three-stage basic type of "lock, running, and charging" to the four-stage type of "lock, normal, power, and charging." "Lock" is in the state where the power is off, and if an optional lock device is added, the wheels will be locked at the same time as the power is turned off. "Running" is the standard driving mode, "Charging" is the position when the stand 124 is set up and the pedal 108 is pedaled to charge, "Normal" is the 4-step standard driving mode, and "Power" is the sport of strong acceleration. The mode. Many of the general electrically power assisted bicycles are equipped with an eco mode in order to save the consumption of the secondary battery, but the electric bicycle of the present invention does not need to be self-charged.

Reference numeral 122 denotes a display unit made of liquid crystal or the like, and when the power key switch is turned on, the states such as running speed, battery voltage, running mode, and regenerative braking mode are collectively displayed. When the stand 124 is set up while the vehicle is stopped and the pedal 108 is rowed for charging, the charging status can be confirmed by the bar display or the numerical display.

Reference numeral 115 denotes a start push button switch, which is used when starting from a stopped state. It is effective only when the crankshaft 103 and the drive wheels are stationary, and one second after pressing, the secondary battery 104 energizes the hub motor 105 for several seconds to rotate the hub motor 105, and the vehicle starts with the electric power of the secondary battery 104 alone. The reason for providing a delay of 1 second is to prevent sudden pop-out at the moment when the finger touches the switch. The delay time is not limited to 1 second, but 0.5 to 2.0 seconds is desirable.

When the start push button switch 115 starts and the drive wheel rotates by 1/2 rotation (= 180 degrees) or more, the speed control means detects this and the crankshaft rotation speed detection means becomes effective, and 1 / of the crankshaft. At the same time as detecting 8 rotations (= 45 degrees) or more, the alternator 101 starts power generation, and shifts from a state in which the alternator 101 is running only with the electric power of the secondary battery 104 to a running state supported by a generator.

When the power key switch 116 is in the traveling position and the crankshaft 103 and the drive wheels are stationary, the start push button switch is effective assuming that the vehicle starts from the bicycle parking lot or is waiting for a signal on a public road. Although it is in the start standby state, even if the foot placed on the pedal 108 moves carelessly in that state, the hub motor 105 does not start unless the speed control means detects more than 1/2 rotation of the drive wheels, which is intended. No runaway will not start.

When both feet are stopped and coasting is started from the power running by the hub motor 105, the crankshaft rotation speed detecting means detects the stationary of the crankshaft 103, and the regenerative brake control means uses the regenerative power from the hub motor 105 as a secondary battery. The regenerative brake operates at the same time as the electricity is stored in 104.

When riding an ordinary bicycle, the driver visually recognizes a decrease in speed or acceleration when approaching an uphill or downhill, and at the same time, feels from the increase or decrease in the load applied to the pedal and pedals strongly or stops the pedal. An operation such as applying a brake is performed, and an operation similar to that is also performed in the present invention. That is, the climbing resistance on the uphill increases the load on the hub motor 105, that is, increases the load on the pedal 108, prompting the driver to recover the speed by increasing the pedaling force of the pedal 108, and suppresses the acceleration on the downhill slope. Acceleration is suppressed by stopping the pedal 108 and squeezing the brake lever 113. In this state, the regenerative brake is operating, so it is safer than a normal bicycle.

The speed control means has "uphill detection" and "downhill detection" functions that judge from the increase or decrease of the hub motor 105 load, and the driver takes appropriate measures against the speed decrease due to the uphill and the acceleration due to the downhill. If neglected, the speed control means detects this and issues acceleration and deceleration commands to control the hub motor 105, respectively. In particular, when an abnormal acceleration is detected on a downhill, the load on the hub motor 105 is increased to increase the braking amount of the regenerative brake to ensure safe driving.

111 and 112 are front wheel and rear wheel disc brakes, respectively, and are operated by the front wheel brake bar 114 and the rear wheel brake bar 113, respectively. The type of brake is not limited to the disc type, and any type may be used. The rear wheel brake lever 113 has a built-in sensor or switch for stopping the power supply to the hub motor 105. In the state of power running in which the crankshaft is rotating, the physical brake is activated by squeezing the lever, and at the same time, the power supply to the hub motor 105 is stopped, and when the lever is returned, the power is turned on again. If the lever is squeezed while the crankshaft is stationary and coasting, it is efficiently braked by both the regenerative brake and the physical brake that are in operation, and if the lever is returned, the braking is returned to the regenerative brake only. If you want to stop, keep squeezing the lever and return the lever when the number of rotations of the drive wheels becomes zero. At the same time, the regenerative brake circuit becomes invalid and the start switch (Fig. 3) is opened to turn the hub motor 105 into an electric circuit. Shut off from and return to the start standby state.

The 118 is a pressure sensor built into the saddle, which detects pressure of 5 kg or more to recognize whether the driver is on the saddle, and the hub motor 105 does not start when the sensor does not detect the pressure. .. Even if the driver inadvertently touches the start push button switch 115 or touches the saddle 108 with his or her fingers while the driver is getting off the saddle, such as when the bicycle is parked by hand when the bicycle is parked, the vehicle will not start runaway. .. The detected weight of the pressure sensor is not limited to 5 kg as long as it can correctly detect whether or not the driver is on the saddle 117.

FIG. 2-1 is a detailed view of the start push button switch 115, showing the mounting direction when mounting near the right handle grip. Reference numeral 201 denotes a protective wall that protects the push button portion to prevent erroneous operation, and the driver operates the push button portion with his / her thumb through the opening in the right direction of the front view. Reference numeral 203 denotes a push-on type switch body, which is covered with waterproof rubber 202 assuming rainy weather. 204 is a switch base, 205 is a lashing belt for attaching to a handle, and 206 is an electric wire connected to a start control means.

This is the end of the description of each equipment and means, and then the method of riding the electric bicycle of the present invention will be described. There are the following three types of starting methods for this electric bicycle.
1. 1. Method of using the start pushbutton switch 115 2. 2. How to kick the ground with your dominant foot while the driver is on the saddle 117. The method in which the driver rides on the saddle 117 after running in parallel with the bicycle (running) In both cases, the pedal 108 is in a state where the drive wheel is rotated by 1/2 rotation (= 180 degrees) or more and the crankshaft rotation speed detecting means is enabled. At the same time as the power generation starts, the hub motor 105 is energized to run.

1. 1. Method by Start Push Button Switch 115 In order to prevent erroneous operation, the start push button switch 115 is surrounded on three sides by a wall as shown in FIG. 2-1 and is covered with a rubber cover for waterproof purposes. This switch is effective only when the crankshaft 103 and the drive wheels are stationary.

When the driver presses this switch from the stopped state on the saddle 117, the drive wheels rotate and start after about 1 second, so the driver pedals the pedal 108 within a few seconds when the hub motor 105 is rotating. As a result, the alternator 101 generates power and starts charging the secondary battery 104, and at the same time, the power supply to the hub motor 105 starts and the vehicle can continue to travel.

The running speed is controlled according to the running mode based on the number of revolutions of the crankshaft 103, so if you pedal the pedal 108 in the same way as driving a normal bicycle, you can run with a light pedaling force and a stronger acceleration force than a normal bicycle. Can be done.

According to the definition of "electrically assisted bicycle" in the Road Traffic Act, the ratio of human pedal pedaling force to electrically assisted bicycle is 1: 2 from the start to 10km / h, so the pedaling force in this section is that of a normal bicycle. It is set so that it does not become 1/3 or less. However, since the structure of the present invention is unprecedented, this numerical value is a reference value including the numerical values described later.

Similarly, since the section from 10 km / h to 24 km / h is defined as a linear gradual decrease from 1: 2 to 0, an arbitrary traveling mode is set within this range.

Assistance is not permitted for speeds of 24 km / h or higher, but the maximum speed is not specified because there is a limit to driving by human power. In the present invention, the pedal force is detected by the torque sensor 303 (FIG. 3) in the gearbox 102, and the pedal force control means 310 (FIG. 3) so that a load equivalent to that of a normal bicycle is applied to the pedal 108 at a speed of 24 km / h or more. Adjusts the load of the alternator 101.

According to the Road Traffic Law overseas, even Japanese-specification "fully electric bicycles" can often be driven on public roads without the need for a license, and the driving mode algorithm can be simplified. In the case of production oriented toward overseas markets, specifications may be set according to the destination.

2. How to kick the ground with your dominant foot Without depending on the start of the hub motor 105, if the driver rides on the saddle 117 and kicks the ground with his dominant foot, turns the drive wheel 1/2 (180 degrees) and pedals the pedal 108. , The crankshaft rotation speed detecting means is enabled, the power generation of the alternator 101 is enabled, and at the same time, the secondary battery 104 also starts supplying power to the hub motor 105 so that the vehicle can travel.

3. 3. Method by approach run If the driver runs in parallel with the bicycle and quickly rides on the saddle 117 and pedals 108, the above 1.2. The power running is started in the same running start state as in.

2. And 3. Is a starting method for the purpose of reducing the burden on the secondary battery 104, but if a reliable start is required by simple operation such as waiting for a signal on a public road, 1. The starting method is desirable.

FIG. 2-2 is a conceptual diagram of traveling speed control by the speed control means. The solid line is the normal running mode of the present invention, which imitates the running of a normal bicycle, and the relationship between the crankshaft rotation speed and the running speed is the same, but in the B and C regions, the pedal pedal force of the present invention is higher than that of the normal bicycle. It is light and gives a driving feeling similar to that of an electrically power assisted bicycle.

Area A shows the state in which the start operation is performed by pressing the start push button switch, and in area B, the driver pedals the pedal 108 to enable the crankshaft rotation speed detecting means, and the alternator 101 starts power generation. It shows a state in which the hub motor 105 is energized and is accelerating. The rotation speed of the hub motor 105, that is, the traveling speed is determined by the crankshaft rotation speed, and in the normal mode, the speed reaches 10 km / h when the crankshaft rotation speed is 35 rpm. The pedal load is mechanically and electrically adjusted so that the ratio of the pedal pedal force and the electric assist force in this region is 1: 2.

Similarly, region C is an acceleration situation from 10 km / h to 24 km / h, and the ratio of pedal depression force to electric assist force in this region is a linear gradual decrease from 1: 2 to 0. In normal mode, the crankshaft speed reaches 24 km / h at 84 rpm.

Since the region D of 24 km / h or more is an area where assist is not recognized in the electrically assisted bicycle, in the present invention, the pedal load is set so that the pedal force equivalent to the pedal pedal force required by a normal bicycle is required at 24 km / h or more. Adjust mechanically and electrically.

These settings are supposed to imitate the "electrically assisted bicycle" defined by the Ministry of Land, Infrastructure, Transport and Tourism, but as mentioned above, since the present invention is unprecedented, the above setting values are reference values and are provided by the Ministry of Land, Infrastructure, Transport and Tourism. Although changes may be necessary depending on the judgment, it is considered that there is a good possibility that driving on public roads that does not require a license will be permitted with the settings of the present invention. The Road Traffic Act in overseas markets does not stipulate the details as in Japan, so it is thought that these settings will not be necessary or will be simplified.

The broken line in the figure indicates the power mode. In the normal mode, it runs at a crankshaft rotation speed of 35 rpm at a speed of 10 km / h, but in the power mode (in the example of this graph), it is set to be powered up to a speed of 15 km / h.

Area E is the area where the speed limiter operates for safety. That is, in both the normal and power modes, the speed limiter operates at a speed of 30 km / h (crankshaft rotation speed = 105 rpm), and even if the crankshaft rotation speed is increased to 105 rpm or more, the speed does not increase any more.

FIG. 3 shows the basic configuration of the electric system. The central control means 307 that analyzes signals from each detection means and performs predetermined control is basically comprehensively controlled by one microcomputer.

S1 is a power key switch that opens and closes the main power supply, and if you set this switch to the "running" position when driving, S1a and S1b will turn on, and when the driver gets on the saddle, the saddle sensor 313 will do it. Is detected and the saddle switch S6 is turned on, and the vehicle is in the start standby state.

When the start pushbutton switch S2 is pressed, the delay circuit 301 turns on the start switch S3 after a delay of about 1 second (0.5 to 2.0 seconds) to start the hub motor M and hold the circuit. The state is held by 302 for a few seconds and the vehicle starts. A few seconds means 3 to 5 seconds, and means a time required for the drive wheels to rotate several times to reach stable running.

When the drive wheel rotates 1/2 rotation or more, the speed control means 308 detects this and the crankshaft rotation speed detection means 305 becomes effective, and at the same time, the self-excited alternator 312 detects 1/8 rotation or more of the crankshaft. Power generation is started, charging of the secondary battery 311 is started, and the start switch S4 is closed to supply power to the hub motor M.

The hub motor M is controlled to a rotation speed according to the crankshaft rotation speed according to a traveling mode stored in advance in the speed control means 308.

In order to lightly brake in a powered running state where the crankshaft is rotating, the manual brake 306 lever is lightly squeezed so that the rear wheel disc brake physically brakes and the speed decreases. When braking further, the brake switch S5 is released at the same time as the physical braking becomes stronger by further squeezing the lever, the hub motor M stops rotating, and when the lever is returned after braking, the brake switch S5 closes and the hub. The motor M rotates again.

In the coasting state in which the crankshaft is stationary, the hub motor M functions as a generator to charge the secondary battery 311 and at the same time operates as a regenerative brake. To apply braking from this state, the manual brake 306 is throttled to physically brake, but the brake switch S5 is not released in the coasting state, and the regenerative brake continuously functions. When the drive wheels finally stop, the regenerative brake is released, the start switch S4 is released, and the state returns to the start standby state.

The above is the explanation of the basic operation from the start to the stop / start standby according to FIG. The following is a description of the charging method when the vehicle is stopped, and the equipment aimed at improving safety and driving performance / feeling.

If there is a concern that the voltage of the secondary battery 311 will drop due to frequent start and stop, or if it is left unattended for a long period of time, stand up and pedal to generate electricity. The battery 311 can be charged. In this case, the power key switch is switched to the "charging" position, and S1a = ON and S1b = OFF. The charging status can be monitored by the display means.

Since the regenerative brake is not required when coasting at a low speed, the regenerative brake control means 309 releases S4 to stop the braking of the drive wheels at a speed of 5 km / h or less, and at the same time, the winding of the hub motor M is not released. The regenerative brake adjustment resistor 315 is connected as a parallel resistor. In this case, the resistance value of the regenerative brake adjusting resistor 315 is selected to be 1 to 2 K ohm, which prevents the generation of an abnormal voltage due to the release of the winding and does not significantly brake the drive wheels.

If the driver fails to take appropriate measures when the speed rises abnormally due to natural acceleration due to a downhill, the speed control means 308 detects this and forcibly activates the regenerative brake, and the regenerative brake control means 309 Set the regenerative brake adjustment resistance 315 to a low value of around 10 ohms and apply strong braking.

Considering the burden on the driver, it is desirable that the pedal force is light, but if it is necessary to satisfy the conditions stipulated by the Road Traffic Act, the pedal force control means 310 is used to apply the pedal force adjustment resistor 314 to the alternator 312. The pedal load may be intentionally increased by connecting in parallel. This operation is automatically performed by comparing the feedback information from the torque sensor 303 with the crankshaft rotation speed.

As described in detail in the above-mentioned "Mode for Carrying Out the Invention", it is possible to carry out from the basic configuration of a single-seater shown in FIG. 1 to the child-carrying bicycle shown in Patent Document 3 (the applicant is the patentee). Is.

Since the electric bicycle of the present invention travels by self-charging, it is expected that the feature that the mileage is close to infinity enhances industrial applicability. If it meets the definition of electrically power assisted bicycle stipulated by the Road Traffic Act of Japan, it is considered to be approved as an electrically power assisted bicycle, and it is possible to drive on public roads without the need for a license, and the mechanical structure is simplified. Because of its high commercial value compared to the current electrically power assisted bicycles and fully electric bicycles, it can be expected to open up new markets.

In the Japanese domestic market, it is possible to commercialize it within the specifications of one type of motorized bicycle stipulated by the Road Traffic Act. Although a moped license is required, it is possible to develop a new market as a product that is an intermediate between electrically power assisted bicycles and 50cc mopeds.

Overseas road traffic laws are looser than Japanese regulations, and in Japan it is often possible to drive on public roads without a license even if the structure is regulated by a fully electric bicycle, so products with specifications that meet the regulations of each country You can contribute to the development of overseas markets by aligning.

There is a code explanation at the bottom of each drawing

Claims (6)

An alternator that generates power by receiving the rotation of the crank shaft that rotates when the driver pedals, a secondary battery that stores the DC power output from the alternator, a detection means that detects the rotation speed of the crank shaft, and a pedal. A torque sensor that detects pedaling force, a pedaling force control means that adjusts the alternator load from the result and applies an appropriate pedal load, a hub motor that drives the front or rear wheel drive wheels, and the vicinity of the right or left hand handle grip A start push button switch that can be operated with the right or left finger, and by pressing and holding this switch for 0.5 to 2 seconds, the hub motor will rotate and start for 3 to 5 seconds only when starting from a stopped state. The speed at which the start control means and the start of rotation of the drive wheels are detected to recognize the state immediately after the start, and then the rotation speed of the hub motor is determined based on the result of the crank shaft rotation speed detection means to control the traveling speed. The control means, the saddle sensor that detects the load applied to the saddle inside the saddle, the runaway start suppression means that prevents the runaway start during bicycle parking operation based on the information from the saddle sensor, and the driver near the center of the handle A display means that displays the running speed, secondary battery voltage, running mode, regenerative braking mode, etc. at once in an easy-to-see position, and a power key switch that opens and closes the entire electric circuit and switches the running mode near the center of the handle. An electric bicycle that is characterized by being equipped. The speed control means can change the speed control pattern by changing its algorithm, can be selected in various ways such as a normal mode and a power mode, and is characterized by being switched by a switch used in combination with a power key switch. The electric bicycle according to claim 1. The speed control means has "uphill detection" and "downhill detection" functions, and if the driver neglects to perform the necessary operations when traveling uphill or downhill, this is detected and automatically performed. The electric bicycle according to claim 1, wherein the speed is adjusted in a specific manner to ensure safe driving. The hub motor operates as a generator in a coasting state to charge the secondary battery and at the same time performs regenerative braking, and controls the braking amount by increasing or decreasing the resistance load connected in parallel to the hub motor. The electric bicycle according to claim 1, further comprising a regenerative brake control means. The electric bicycle according to claim 1, wherein the crankshaft is provided with a reverse rotation preventing means such as a ratchet gear, and prevents the alternator from reverse rotation when the pedal is pedaled in the reverse rotation. Claims 1, 2, 3, 4, and 5 of the "bicycle with infant seat" of Japanese Patent Application No. 2018-207940 (Patent No. 6516310) for which the applicant of the present invention is the right holder, which is listed in Patent Document 3. Electric bicycle with features applied.

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