JP6512932B2 - bicycle - Google Patents

Description

  The present invention relates to an improvement of a bicycle having a structure in which a front wheel is driven to travel by stepping down pedals provided on both sides of the front wheel.

  A pedal is provided on each side of the front wheel constituting the bicycle so as to be able to move up and down, and by stepping on the pedal, the front wheel is rotated in a direction to advance the bicycle, and at the time of returning from the stepping position to the pedaling front position. As a bicycle configured not to rotate the front wheel, there is one disclosed in Patent Document 1 disclosed by the present applicant.

  In the bicycle of Patent Document 1, free wheels are respectively provided on the left and right of the trunk constituting the front wheel hub. The left pedal and the left free wheel are linked via a chain, and the right pedal and the right free wheel are linked via a chain. The left and right freewheels rotate forward when the pedals are depressed and rotate the front wheels in the direction of advancing the bicycle.

  Further, in the bicycle of Patent Document 1, a rotational force is applied to the front wheel by a motor.

JP, 2014-151737, A

  The main problem to be solved by the present invention is that, in a bicycle having a structure in which the front wheel is driven to travel by depressing this kind of pedal downward, appropriate and rational motor assistance (assist) is provided. The point is to realize. In particular, if you want the bicycle to run slowly or flatly, by stepping on the pedals with a weak force, the motor can apply a weak auxiliary rotational force, and the bicycle can be relatively fast or When it is desired to raise the inclined place, it is in point that a strong auxiliary rotational force is applied by the motor by stepping on the pedal with a strong force.

In order to solve the above-mentioned problems, according to the present invention, according to a first aspect of the present invention, there is provided a bicycle, comprising:
A horizontal shaft supported by the forks on the front wheels,
Drive side gear and free wheel combined with horizontal axis,
A linking member linking the pedal and the freewheel so that the horizontal axis is normally rotated when the pedal is depressed;
The lower free wheel on the front wheel hub,
A chain that is trained between the drive gear and the lower freewheel,
And a motor for applying an auxiliary rotational force in a direction for advancing the bicycle to one or both of the front wheel and the rear wheel,
The motor circuit is provided with switch means which is closed when the pedal is moved downward and opened when the pedal is moved upward.
The switch means is configured to include the first and second switches, and when the first switch is closed, the motor does not allow the bicycle to run at a speed exceeding the predetermined first speed. , And when the second switch is closed, the motor applies an auxiliary torque within a range that does not allow the bicycle to travel at a speed exceeding the second speed greater than the first speed,
The first switch is closed when the pedal is depressed with a force less than the predetermined depression force, and the second switch is closed when the pedal is depressed with the predetermined depression force. There was a thing.

  According to this configuration, firstly, by stepping on the pedal, it is possible to rotate the front wheel of the bicycle to run the bicycle. Second, when it is desired to run the bicycle slowly or in a flat place slowly, by stepping on the pedal with a force less than a predetermined stepping force, the bicycle does not exceed the first speed. The auxiliary rotational force of the motor can be applied to the rear wheel so as to travel. Also, when it is desired to move the bicycle relatively fast or to raise the sloped place, by stepping on the pedal with a predetermined stepping force, the speed at which the bicycle does not exceed the second speed higher than the first speed. The auxiliary rotational force of the motor can be applied to the rear wheel in the illustrated example so that the vehicle travels on the road.

Further, in order to solve the above-mentioned problems, according to the present invention, according to the second aspect of the present invention, a left pedal and a right pedal are combined with a fork supporting a front wheel so as to be vertically reciprocable. ,
A horizontal shaft supported by the forks on the front wheels,
Drive side gear combined with horizontal axis, left side free wheel and right side free wheel,
A left side link member linking the left side pedal and the left side free wheel so that the horizontal axis is normally rotated when the left side pedal is depressed;
A right link member that links the right pedal and the right free wheel to rotate the horizontal axis normally when the right pedal is depressed;
The lower free wheel on the front wheel hub,
A chain that is trained between the drive gear and the lower freewheel,
And a motor for applying an auxiliary rotational force in a direction for advancing the bicycle to one or both of the front wheel and the rear wheel,
The motor circuit is provided with left switch means which is closed when the left pedal is moved downward and opened when the left pedal is moved upward;
A right switch means which is closed when the right pedal is moved downward and opened when the right pedal is moved upward;
The left side switch means and the right side switch means are respectively configured to include a first and a second switch, and when the first switch is closed, the motor travels the bicycle at a speed exceeding the predetermined first speed. When the second switch is closed, the motor applies an auxiliary rotational force within a range not causing the bicycle to run at a speed exceeding a predetermined second speed higher than the first speed. It has become
The first switch is closed when the left pedal or the right pedal is depressed with a force less than the predetermined stepping force, and the second switch is closed when the left pedal or the right pedal is depressed with the predetermined pedal force. It was supposed to be closed.

  According to such a configuration, it is possible to rotate the front wheel of the bicycle and run the bicycle by first depressing either or both of the left side pedal and the right side pedal. Second, when it is desired to travel the bicycle slowly or in a flat place, the bicycle can carry out the first speed by depressing the left pedal or the right pedal with a force less than a predetermined stepping force. The auxiliary rotational force of the motor can be applied to the rear wheel so as to travel at a speed not exceeding the speed. In addition, when it is desired to move the bicycle relatively fast or to raise the sloped place, the second speed higher than the first speed is obtained by pressing the left side pedal or the right side pedal with a force exceeding a predetermined stepping force. The auxiliary rotational force of the motor can be applied to the rear wheel in the illustrated example so that the vehicle travels at a speed not exceeding.

  According to the present invention, in a bicycle having a structure in which the front wheel is driven to travel by depressing this type of pedal downward, assist (assist) for traveling by a motor can be appropriately and rationally realized. Among other things, it is possible to apply the auxiliary rotational force of the motor so that the bicycle can travel at the desired comfortable speed.

FIG. 1 is a perspective view of a bicycle according to an embodiment of the present invention. FIG. 2 is a left side view of the bicycle according to the embodiment of the present invention. FIG. 3 is a front view of the main part of the bicycle, in which the clutch means is in the ON state. FIG. 4 is a left side structural view of the essential part showing the state where the right side pedal and the crank constituting the bicycle are at the upper limit, and the state where they are at the lower limit is indicated by a two-dot chain line. FIG. 5 is a perspective view showing an essential part of each member including a horizontal axis disposed on the front wheel of the bicycle. FIG. 6 is a left side view showing an essential part of an extension member attached to the right crank constituting the bicycle. FIG. 7 is a configuration diagram showing an example of a circuit of a motor that constitutes the bicycle.

  Hereinafter, based on FIGS. 1-7, the typical embodiment of this invention is described. The bicycle according to this embodiment is driven by driving the front wheel 1 by stepping on pedals 2 disposed on both sides of the front wheel 1 to travel. Although illustration is omitted, even if the pedal 2 is provided only on the right or left side of the front wheel 1, it is possible to configure a bicycle that can achieve the object of the present invention. In this case, it is sufficient to have only one set of the freewheel and the linking member for linking the freewheel with the pedal and the pedal combined with the horizontal axis 4 in the illustrated example.

The bicycle comprises: (1) a left side pedal 2 and a right side pedal 2 combined so as to be capable of reciprocating in the vertical direction with respect to a fork 3 supporting the front wheel 1;
(2) on the front wheel 1, a horizontal shaft 4 supported by the fork 3;
(3) the left free wheel 5 and the right free wheel 6 combined with the horizontal axis 4;
(4) A left link member 7 linking the left pedal 2 and the left free wheel 5 so that the horizontal axis 4 is normally rotated when the left pedal 2 is depressed,
(5) A right link member 8 linking the right pedal 2 and the right free wheel 6 so that the horizontal axis 4 is normally rotated when the right pedal 2 is depressed,
(6) The drive-side gear 9 provided on the horizontal shaft 4 so as to be capable of normal rotation and reverse rotation around this,
(7) clutch means 10 of the horizontal shaft 4 and the drive gear 9;
(8) a lower free wheel 12 provided on the hub 11 of the front wheel 1;
(9) A chain 13 wound around between the drive gear 9 and the lower free wheel 12
(10) A motor 22 is provided which causes the auxiliary rotational force in the direction of advancing the bicycle to act on either or both of the front wheel 1 and the rear wheel 1 '.
The front wheel 1 is rotated in the forward direction of the bicycle by forward rotation of the drive gear 9.

  In the figure, reference numeral 14 denotes a frame, reference numeral 15 denotes a saddle, reference numeral 16 denotes a head tube constituting the frame, and reference numeral 17 denotes a control tube rotatably supported by the head tube 16. In the illustrated example, the bicycle is a three-wheeled vehicle having one front wheel 1 and two rear wheels 1 '. In addition, in each figure, in order to make it easy to understand the characteristic structure of the bicycle concerning this embodiment, the structure of the bicycle other than the structure which concerns on this characteristic structure is abbreviate | omitted and shown. However, the front wheel 1 may be two wheels, and the rear wheel 1 'may be one wheel. That is, the characteristic configuration is also applicable to a two-wheeled bicycle, a four-wheeled bicycle, and a three-wheeled bicycle having one rear wheel 1 '.

  An axle 18 of the front wheel 1 is supported between the lower end of the left portion of the fork 3 and the lower end of the right portion of the fork 3, and the body of the hub 11 rotates about the axle 18. In the illustrated example, the lower free wheel 12 is provided at the right end of the torso of the hub 11 (right side in the traveling direction of the bicycle / left side in FIG. 3 when the bicycle is viewed from the front). The lower free wheel 12 rotates the body of the hub 11 in the forward direction to bicycle the front wheel 1 only when the chain 13 travels by the depression of the left side pedal 2 or the right side pedal 2, that is, the downward movement. It is designed to rotate in the direction to advance the

  The left pedal 2 and the right pedal 2 are both provided on a crank 2a which is rotatably supported at the lower end of an arm 3a protruding rearward from the fork 3 and extends forward in the illustrated example. The front wheel 1 and the fork 3 are fitted between the left and right cranks 2a, 2a.

  The horizontal shaft 4 is supported by the fork 3 via a bracket 19. In the example of illustration, the bracket 19 is provided with the back 19b fixed to the upper part of the fork 3 below the top part 19a, and the side parts 19c and 19c on either side. The horizontal shaft 4 is bridged between the left and right side portions 19c, 19c of the bracket 19 via a bearing 19d.

  The left side free wheel 5 and the right side free wheel 6 are respectively combined with the horizontal axis 4 through the horizontal axis 4 inside.

  In the illustrated example, on the left side of the front wheel 1, a chain 7a having its lower end fixed to an extension member 24 attached to the free end of the crank 2a is wound around the left free wheel 5 and its upper end It is fixed to the left free wheel 5. Further, on the right side of the front wheel 1, a chain 8a whose lower end is fixed to an extension member 24 attached to the free end of the crank 2a is wound around the right free wheel 6, and its upper end is made the right free wheel It is fixed to 6.

  The left side free wheel 5 and the right side free wheel 6 respectively have sprocket portions 5b, 6b around which the chains 7a, 8a are wound around one end of the body portions 5a, 6a, and a flange 5c at the other end of the body portions 5a, 6a. , 6c are provided.

  In the illustrated example, on the left and right sides of the front wheel 1, a return means 20 for the crank 2a comprising a tension coil spring 20a and a wire portion 20b integrally connected to the upper end of the tension coil spring 20a and extending upward is provided. ing.

  On the left side of the front wheel, the lower end of the spring 20a constituting the return means 20 is fixed to the lower end of the left part of the fork 3, the end of the wire part 20b is fixed to the trunk 5a of the left free wheel 5, When the free end of the crank 2a is at the upper limit located at the uppermost position, the spring 20a is in the most contracted state (see FIGS. 2 and 3). When the left side pedal 2 is depressed, the wire portion 20b is wound up by the left side free wheel 5 which is rotated forward, and the spring 20a is extended. The lower limit of the movement of the left crank 2a due to the stepping is the position at which an extension member 24, which will be described later, abuts against a stopper provided on the fork 3 indicated by reference numeral 21 in the drawing. When the depression is stopped, the spring 20a elastically returns to reverse the left free wheel 5. As a result, the left crank 2a is returned to the upper limit position. Since the right return means 20 of the front wheel functions in the same manner as the left return means 20, the description of the right return means 20 of the front wheel will be omitted.

  That is, when the left side pedal 2 is depressed, the chain 7a travels while stretching the spring 20a, whereby the left side free wheel 5 is rotated forward, and along with this, the horizontal shaft 4 is also rotated forward. When the stepping-in operation is stopped, the left free wheel 5 is reversed on the outside of the horizontal shaft 4, and the left pedal 2 is returned to the pre-depression position by the biasing of the spring 20a. When the right pedal 2 is depressed, the chain 8a travels while stretching the spring 20a, whereby the right free wheel 6 is rotated forward and the horizontal shaft 4 is also rotated accordingly. When the stepping is stopped, the right side free wheel 6 is reversed at the outside of the horizontal shaft 4, and the right pedal 2 is returned to the position before the stepping by the urging of the spring 20a.

  That is, in the illustrated example, the chain 7 a functions as the left link member 7 and the chain 8 a functions as the right link member 8. The left side link member 7 and the right side link member 8 can also be configured by a wire, a transmission belt, or the like.

  The drive gear 9 is provided between the left free wheel 5 and the right free wheel 6 on the horizontal axis 4. The driving gear 9 and the lower free wheel 12 are linked by an endless chain 13 so that one rotational force is transmitted to the other. The driving gear 9 includes a sprocket portion indicated by reference numeral 9a in the drawing, a body portion indicated by 9b, and a flange indicated by 9c. The to-be-engaged part mentioned later is formed in the flange 9c.

  The clutch means 10 comprises a spline portion (not shown) formed on the horizontal shaft 4, a movable body 10a combined with the spline portion, and an operation member (not shown) of the movable body 10a. The movable body 10a is in the form of a sleeve having flanges 10b at the left end and the right end of the cylinder, the horizontal shaft 4 is passed through the inside, and the inside is fitted into the spline and guided by the spline Shape. In the illustrated example, an engagement portion (not shown) engaged with the engagement portion (not shown) of the drive gear 9 is formed on the right flange 10b of the movable body 10a. In the figure, reference numeral 10c is a spring which always biases the movable body to a position to be in the ON state described later.

  In the ON state in which the movable body 10a and the drive side gear 9 are engaged, the horizontal shaft 4 and the drive side gear 9 are integrated, and by stepping on the left side pedal 2 or the right side pedal 2, via the left side free wheel 5 and the right side free wheel 6 When the horizontal shaft 4 is rotated forward, the drive gear 9 is also rotated forward, and the front wheel 1 is rotated in the forward direction of the bicycle through the chain 13 and the lower free wheel 12. When the movable body 10a is moved leftward from the ON state, the meshing between the movable body 10a and the drive gear 9 is released, resulting in an OFF state. In this OFF state, even if the horizontal shaft 4 is rotated forward by the depression of the left side pedal 2 and the right side pedal 2, the drive gear 9 does not rotate, and therefore the front wheel 1 is not rotated either, and the bicycle does not travel. When trying to retract the bicycle stopped in this OFF state, the driving gear 9 is subjected to a force in the direction to reverse it via the chain 13 by the front wheel 1 which is rotated in the reverse direction to the forward direction. However, since the connection between the drive gear 9 and the horizontal shaft 4 is released, the reverse rotation of the drive gear 9 is permitted, and thus the bicycle can be retracted.

  Further, in this embodiment, the motor 22 is supported by the rack 23 supported between the rear wheels 1 ′, 1 ′, and the auxiliary rotational force in the direction for advancing the bicycle by the drive of the motor 22 is It acts on the rear wheel 1 '. Although illustration is omitted, the auxiliary rotational force by the motor 22 may be applied to the front wheel, or the auxiliary rotational force by the motor 22 may be applied to both the front wheel 1 and the rear wheel 1 ′.

  Further, in this embodiment, the left switch means 222 is closed when the left pedal 2 is moved downward and is opened when the left pedal 2 is moved upward by the circuit 221 of the motor 22. And right switch means 223 which is closed when the right pedal 2 is moved downward and opened when the right pedal 2 is moved upward. The left switch means 222 and the right switch means 223 include first and second switches 222a, 222b, 223a, 223b, respectively, and when the first switches 222a, 223a are closed, The motor 22 exerts an auxiliary rotational force in a range not causing the bicycle to travel at a speed exceeding the first predetermined speed, and when the second switches 222b and 223b are closed, the motor 22 exceeds the first speed. The auxiliary torque is applied in a range that does not allow the vehicle to travel at a speed exceeding a predetermined second speed.

  An example of the circuit 221 is shown in FIG. In the figure, reference numeral 224 denotes a main switch, reference numeral 225 denotes a power supply, reference numeral 226 denotes a speed control unit, and reference numeral 227 denotes a soft start circuit. The left switch means 222 and the right switch means 223 are each connected to the soft start circuit 221. In the case where the bicycle according to this embodiment is used for assisting the movement of a person who is difficult to walk or elderly people etc., typically, the first speed is 6 km / h, the second speed Is preferably 12 Km / hour. By providing such a circuit 221 with a variable resistor, it is possible to adjust the first speed and the second speed to a desired speed.

  Then, in this embodiment, when the left pedal 2 or the right pedal 2 is depressed with a force less than a predetermined depression force, the first switches 222a and 223a are closed, and a force exceeding the predetermined depression force is obtained. The second switches 222b and 223b are closed when the pedal is depressed.

  In the illustrated example, an extension member 24 is attached to the free end of the crank 2a on both left and right sides of the front wheel. The extension member 24 includes a channel-like body 241 including an upper wall 241 a, a lower wall 241 b, and a side wall 241 c, a rotating body 242, and an urging body 243. The free end of the crank 2 a is accommodated in the channel body 241 from one end side 241 d of the channel body 241. The pivoting body 242 includes an arm portion 242a which protrudes from the other end side 241e of the channel-like body 241, and a base 242b which is accommodated in the channel-like body 241, and is rotatably combined with the side wall 241c in the base 242b. There is. An overhanging portion 241f is formed on the upper portion of the channel-like body 241, and between the overhanging portion 241f and a step directed to the free end side of the crank 2a formed on the upper portion of the arm portion 242a of the rotating body 242. The biasing body 243 is interposed. The biasing body 243 always abuts the front end of the spring against the arm portion 242a, and the inner compression coil spring 243a always abuts the rear end of the spring against the projecting portion 241f, and the arm portion with the inner compression coil spring 243a housed inside It is comprised from the outer side compression coiled spring 243b interposed between 242a and the overhang | projection part 241f. The front end of the outer compression coil spring 243b is not in contact with the arm portion 242a when the crank 2a is at the upper limit position and the lower limit position. The lower ends of the chains 7 a and 8 a are fixed to the arm portion 242 a of the rotating body 242 in front of the contact position with the biasing body 243.

  The first switch 222a, 223a and the second switch 222b, 223b are housed in the channel body 241 between the base 242b of the pivoting body 242 and the free end of the crank 2a. The second switches 222b and 223b are located above the first switches 222a and 223a. Further, each of the first switches 222a and 223a and the second switches 222b and 223b has a movable portion 228 which protrudes forward by urging. When the crank 2a is at the upper limit position and the lower limit position, the movable portion 228 is completely retracted by the base 242b of the rotating body 242 urged in the counterclockwise direction f1 in FIG. In this state, it becomes open (OFF).

  On the left side of the front wheel 1, first, when the left pedal 2 is depressed with a force less than a predetermined stepping force, the tension of the chain 7a causes the rotating body 242 to compress the inner compression coil spring 243a constituting the biasing body 243 ( In the illustrated example, it is turned slightly in the direction of clockwise f2 in FIG. Thus, when the pivoting body 242 is pivoted, the base 242b is separated from the movable portion 228 of the first switch 222a, 223a located at a position farther than the pivot axis, and the movable portion 228 of the first switch 222a, 223a is pivoted. Moving forward, the first switches 222a and 223a are closed. As a result, the auxiliary torque can be controlled by the circuit 221 to act on the rear wheel in the illustrated example in a range where the motor 22 does not travel the bicycle at a speed exceeding the first speed.

  Next, when the left pedal 2 is depressed with a force exceeding a predetermined depression force, the tension of the chain 7a causes the rotating body 242 to compress both the inner compression coil spring 243a and the outer compression coil spring 243b constituting the biasing body 243 (shown In the example of (1), it is rotated largely by the direction of clockwise f2 in FIG. Thus, when the pivoting body 242 is pivoted, the base 242b is separated from both the movable portion 228 of the first switch 222a, 223a and the movable portion 228 of the second switch 222b, 223b from the pivoting axis. The movable portions 228 of the switches 222a and 223a and the second switches 222b and 223b move forward, and the first switches 222a and 223a and the second switches 222b and 223b are closed. As a result, by means of the circuit 221, an auxiliary rotational force in a range in which the motor 22 does not run at a speed not exceeding the predetermined second speed greater than the first speed is applied to the rear wheel 1 'in the illustrated example. Can be controlled.

  When the left side pedal 2 reaches the lower limit position, the tension of the chain 7a is reduced by the contact of the extension member 24 with the stopper 21. Therefore, when the left side pedal 2 is depressed with a force smaller than a predetermined stepping force, the inner compression coil spring 243a The pivoting member 242 is returned to the position before pivoting, and the driving of the motor 22 is stopped. When the left pedal 2 is depressed with a force exceeding a predetermined depressing force, the pivoting body 242 is first pivoted to the position where the second switches 222b and 223b are opened by the biasing of the outer compression coil spring 243b. The drive of the motor 22 is stopped by returning to the position before the rotation by the biasing of the inner compression coil spring 243a.

  In addition, since the right side switch means 223 of the front wheel 1 is configured to function in the same manner as the left side switch means 222, the description of the right side switch means 223 of the front wheel is omitted.

  Thereby, in this embodiment, when it is desired to run the bicycle slowly or slowly on a flat place, the left pedal 2 with a force less than a predetermined stepping force (typically less than 9 kg) Alternatively, by stepping on the right side pedal 2, the auxiliary rotational force of the motor 22 can be applied to the rear wheel 1 'in the illustrated example so that the bicycle travels at a speed not exceeding the first speed. Also, when it is desired to move the bicycle relatively quickly or to move up the sloped place, the bicycle can be made to have a speed greater than the first speed by stepping on the left pedal 2 or the right pedal 2 with a force exceeding a predetermined stepping force. The auxiliary rotational force of the motor 22 can be applied to the rear wheel 1 'in the illustrated example so as to travel at a speed not exceeding two speeds.

  Although not shown, the left and right switch means 222, 223 may be composed of three or more switches including the first and second switches 222a, 223a, 222b, 223b. In this case, it is possible to vary the magnitude of the auxiliary rotational force exerted by the motor 22 in three or more steps in accordance with the depression force of the left pedal 2 or the right pedal 2.

  As a matter of course, the present invention is not limited to the embodiments described above, but includes all the embodiments that can achieve the object of the present invention.

2 pedal 22 motor 222 left switch means 223 right switch means 222a, 223a first switch 222b, 223b second switch

Claims (2)

A pedal capable of reciprocating up and down with respect to a fork supporting the front wheel;
A horizontal shaft supported by the forks on the front wheels,
Drive side gear and free wheel combined with horizontal axis,
A linking member linking the pedal and the freewheel so that the horizontal axis is normally rotated when the pedal is depressed;
The lower free wheel on the front wheel hub,
A chain that is trained between the drive gear and the lower freewheel,
And a motor for applying an auxiliary rotational force in a direction for advancing the bicycle to one or both of the front wheel and the rear wheel,
The motor circuit is provided with switch means which is closed when the pedal is moved downward and opened when the pedal is moved upward.
The switch means is configured to include the first and second switches, and when the first switch is closed, the motor does not allow the bicycle to run at a speed exceeding the predetermined first speed. , And when the second switch is closed, the motor applies an auxiliary torque within a range that does not allow the bicycle to travel at a speed exceeding the second speed greater than the first speed,
The first switch is closed when the pedal is depressed with a force less than the predetermined depression force, and the second switch is closed when the pedal is depressed with the predetermined depression force. Have a bike. A left side pedal and a right side pedal combined so as to be capable of reciprocating in the vertical direction with respect to a fork supporting the front wheel;
A horizontal shaft supported by the forks on the front wheels,
Drive side gear combined with horizontal axis, left side free wheel and right side free wheel,
A left side link member linking the left side pedal and the left side free wheel so that the horizontal axis is normally rotated when the left side pedal is depressed;
A right link member that links the right pedal and the right free wheel to rotate the horizontal axis normally when the right pedal is depressed;
The lower free wheel on the front wheel hub,
A chain that is trained between the drive gear and the lower freewheel,
And a motor for applying an auxiliary rotational force in a direction for advancing the bicycle to one or both of the front wheel and the rear wheel,
The motor circuit is provided with left switch means which is closed when the left pedal is moved downward and opened when the left pedal is moved upward;
A right switch means which is closed when the right pedal is moved downward and opened when the right pedal is moved upward;
The left side switch means and the right side switch means are respectively configured to include a first and a second switch, and when the first switch is closed, the motor travels the bicycle at a speed exceeding the predetermined first speed. When the second switch is closed, the motor applies an auxiliary rotational force within a range not causing the bicycle to run at a speed exceeding a predetermined second speed higher than the first speed. It has become
The first switch is closed when the left pedal or the right pedal is depressed with a force less than the predetermined stepping force, and the second switch is closed when the left pedal or the right pedal is depressed with the predetermined pedal force. The bicycle is supposed to be closed.