Bicycle having pedals with wheels

Abstract

To provide an option for a novel bicycle different from a three-wheel bicycle intended for a person who has no confidence in sense of balance or auxiliary wheels attached to left and right sides of a two-wheel bicycle near a rear wheel.SOLUTION: Front ends of long bicycle pedals 7 are freely rotatively disposed on a rotation shaft which juts out vertically to an advancing direction from a distal end of a crank 10, and rear ends of the pedals have freely rotative wheels 13 disposed. This results in a stand pedaling bicycle having a simple frame 9. Moreover, a bicycle whose advancing direction can be manipulated by controlling the rotation of a handlebar 1 identical to that of a two-wheel vehicle can be constructed using the frame of a two-wheel bicycle with a saddle as it is. Accordingly, provided is an option for a novel bicycle other than a three-wheel bicycle that is less likely to fall leftward or rightward or auxiliary wheels attached to left and right sides of a two-wheel vehicle near a rear wheel 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to bicycle pedals. [Background technology]

[0002] In particular, standing bicycles have long pedals on which the entire foot can be placed. Some of these long pedals have separate fulcrums at the front and back so that the pedals do not rotate freely, but are configured to resemble the movement of the feet when a person walks. To achieve this, two pairs of rotating pedals are provided (for example, KR-A-040096270, JP 2022-016329). Alternatively, structures have been proposed in which one of the long pedals rotates for driving while the other performs pendulum motion or sliding (for example, CN-A-101983892, CN-A-106061827, KR-A-110067080, US-A1-2005 / 0248117, JP 07-205871, JP 2016-501147).

[0003] When pedaling on a two-wheeled bicycle, the force acts to tilt the body to the left or right, but on a two-wheeled bicycle with handlebars and a saddle, both of these can suppress the force of tipping, but if you stand on a bicycle and don't have a saddle, the suppression is reduced and it becomes easier to tip to the left or right. Also, when riding, the gyro effect caused by the rotation of the wheels helps to suppress the force of tipping to the left or right, but when not riding, the gyro effect does not work, and when you start riding or when the wheels are small, the gyro effect is small and it becomes easier to tip to the left or right.

[0004] One way to compensate for the tendency of a bicycle to tip over sideways is to attach training wheels to the left and right near the rear wheels of a three-wheeled or two-wheeled bicycle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] KR-A-040096270 [Patent Document 2] Patent Publication No. 2022-016329 [Patent Document 3] CN-A-101983892 [Patent Document 4] CN-A-106061827 [Patent Document 5] KR-A-110067080 [Patent Document 6] US-A1-2005 / 0248117 [Patent Document 7] Patent Publication No. 07-205871 [Patent Document 8] Special table 2016-501147 Summary of the Invention [Problem to be solved by the invention]

[0006] In the case of a bicycle with long pedals, if you want to configure it so that there are two fulcrums, one at the front and one at the back of the pedal, to mimic the movement of the foot when a person walks, the frame must be designed to accommodate those two fulcrums.

[0007] With a two-wheeled bicycle, when you step on the left and right pedals, a force acts in the direction that makes the bicycle lean to the left or right. One solution to this problem is the three-wheeled bicycle, but the difference in structure from a two-wheeled bicycle results in differences in the way it is handled. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a bicycle in which the force of pressing on a pedal freely rotatably attached to the end of a crank rotates the drive shaft of the wheel and moves the bicycle forward.The pedal is long and large enough to place the entire foot on, with its front end freely rotatably attached to a rotating shaft that extends perpendicular to the direction of travel from the end of the crank, and its rear end freely rotatably attached to a wheel.

[0009] The above-mentioned solution to the problem has the following effects: First, by making the fulcrum of the rear end of the long pedal the point where it touches the ground through the wheel, it is no longer necessary to locate the fulcrum on the main frame.

[0010] Next, when you step on the left and right pedals of a two-wheeled bicycle, the force acts to tip the bicycle to the left or right, but by mounting a wheel on each pedal, a fulcrum is provided on the ground to the left and right of the center of the body, dispersing the force that tries to tip the body. At the same time, because the relative height of the wheels directly attached to the pedals is not fixed to the front and rear wheels of a two-wheeled bicycle, even when the bicycle leans to the left or right when turning by turning the front wheel with the handlebars, the wheels directly attached to the pedals can change their height accordingly. Effect of the Invention

[0011] As described above, the present invention is a bicycle that moves forward by rotating the drive shaft of the wheel with the force of the foot stepping on the pedal that is freely rotatable at the end of the crank. The pedal is long enough to place the whole foot on, and the front end of the pedal is freely rotatably attached to the rotation shaft that extends perpendicularly from the end of the crank to the direction of travel, and the rear end of the pedal is freely rotatably attached to the wheel, making it possible to configure a stand-up bicycle with a simple frame. In addition, while following the method of rotating the front wheel with the handlebars of a two-wheeled bicycle, the bicycle can be ridden without falling over even when both feet are on the pedal and not moving, and is difficult to tip over from side to side even when the gyro effect caused by the rotation of the wheel at the beginning of pedaling is small. This provides a new bicycle option that is different from the training wheels attached to the left and right near the rear wheel of a three-wheeled bicycle or a two-wheeled bicycle for people who are not confident in their sense of balance. [Brief description of the drawings]

[0012] [Figure 1] A side view of the first embodiment of the present invention. [Diagram 2] A side view of the second embodiment of the present invention. [Diagram 3] A side view of the third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to the accompanying drawings, in which: Figure 1 shows a first embodiment of the present invention.

[0014] A head pipe 2 is attached to the front end of a body frame 9 by welding or the like, and a drive shaft 12 for a rear wheel 11 is attached to the rear end by screws or the like. A handlebar 1 is rotatably attached to the head pipe 2. A bifurcated front fork 3 is attached below the handlebar 1, and both ends of the rotating shaft of a front wheel 4 are attached to the lower ends of the front fork 3. The handlebar 1 has two brake levers, which are connected to the front wheel 4 and the rear wheel 11 via wires, respectively, and the brake device is activated by pulling the brake lever, so that the rotation of the front wheel 4 and the rear wheel 11 can be braked.

[0015] A pedal rotating shaft 6 is mounted on the vehicle frame 9. A chain wheel 5 is mounted on the pedal rotating shaft 6, and a chain 8 is suspended between it and the chain wheel of a drive shaft 12 for the rear wheel. A crank 10 is mounted on the pedal rotating shaft 6. The front end of a long pedal 7 is connected to the end of the crank 10 so as to be freely rotatable. A pedal-directly-mounted wheel 13 is mounted on the rear end of the long pedal 7 so as to be freely rotatable.

[0016] In the manner described above, the bicycle according to the first embodiment of the present invention can be formed, and by gripping the handlebars 1 with both hands and pedaling the long pedals 7 with both feet, the rear wheel 11 is rotated to make the bicycle move, and the direction of travel can be changed by rotating the handlebars 1 to control the direction of the front wheel 4. The vertical movement range of the front end of the long pedals 7 varies by the vertical movement range of the crank, but the vertical movement range of the rear end is small because the contact surface of the pedal-mounted wheel 13 always moves back and forth on the ground. This means that the toes placed near the front end have a larger vertical movement range than the heels placed near the rear end, which is similar to the natural walking movement due to the structure of the foot.

[0017] Fig. 2 shows a second embodiment of the present invention. Fig. 1 shows a bicycle without a saddle for standing, but by adding a saddle 14 to the frame 9 as shown in Fig. 2, the present invention can be used for a bicycle for sitting and pedaling.

[0018] Figure 3 shows a third embodiment of the present invention. A bifurcated front fork 3 is attached below the handlebars 1, and both ends of the rotating shaft of a front wheel 4 are attached to the lower ends of this front fork 3. The front wheel 4 has a crank 10 attached to a free wheel or a fixed rotating shaft. The front end of a long pedal 7 is rotatably connected to the end of the crank 10. A pedal-mounted wheel 13 is rotatably attached to the rear end of the long pedal 7. In this case, the direction of travel can be controlled by tilting the handlebars 1 left or right rather than by rotating them. [Explanation of symbols]

[0019] 1 Handle 2 Head pipe 3 Front fork 4 Front Wheel 5 Chainwheel 6 Pedal pivot 7. Long Pedals 8. Chain 9 Frame 10. Crank 11 Rear wheel 12 Rear wheel drive shaft 13 Pedal-mounted wheels 14 Saddle

Claims

[Claim 1] In a bicycle in which the force of stepping on a pedal freely rotatably attached to the tip of a crank rotates the drive shaft of the wheel to move the bicycle forward, this pedal is long enough to place the whole foot on, with its front end freely rotatably attached to the rotation shaft extending perpendicularly to the direction of travel from the tip of the crank, and its rear end freely rotatably attached to the wheel.

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