JP2000001193A - Labor saving bicycle with bent crank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the labor saving bicycle with bent crank, in which, in stepping on the pedals thereof, the strength of the legs reinforced by the crank rotates the axis and is transmitted to the wheels, which makes people in climbing up or running for a long distance, and those with weak strength of the legs including aged, disabled, sick or injured people less in the normal running less fatigued, and also contributes to energy conservation when installed on an electrically assisted bicycle. SOLUTION: A left crank 1 of this bicycle with upper and lower surfaces thereof bent at an angle with high rotation efficiency, and a right crank 2 with upper and lower surfaces thereof bent at the reverse angle with high rotation efficiency are symmetrically installed on an axis 3. In stepping down pedals 4 mounted to the both cranks, the strength of the leg reinforced by the crank rotates the axis, and then is transmitted to the wheels. Accordingly, this labor saving bicycle with bent crank can run with conserved labor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-saving bicycle using a bent crank.

[0002]

2. Description of the Related Art A conventional bicycle has a rod-shaped crank.

[0003]

These have the following disadvantages. (A) Even when stepping on the petals, the leg strength is not increased by the crank. (B) Therefore, traveling uphill or traveling long distances is tired. (C) People with weak legs, such as the elderly, the disabled, the sick, and the injured, become tired even during normal running. (D) Electric assisted bicycles consume energy. This has been made in order to solve the above disadvantages.

[0004]

Means for Solving the Problems The upper and lower surfaces of the left crank (1) of the bicycle are bent at an angle with high rotational efficiency, and the upper and lower surfaces of the right crank (2) are bent at opposite angles with high rotational efficiency, and the shaft is symmetrical left and right. When stepping on the petal (4) attached to both cranks attached to (3), the leg strength is increased by the crank and transmitted to the wheel turning the shaft, so the bicycle can be moved with less labor, it is a labor-saving bicycle with a bent crank .

[0005]

Embodiments of the present invention will be described below. (B) The upper and lower surfaces of the left crank (1) are bent at an angle with high rotational efficiency. (B) The upper and lower surfaces of the right crank (2) are bent at opposite angles with good rotational efficiency. (C) The two cranks are mounted symmetrically on the shaft (3). (D) Attach petals (4) to both cranks.

[0006]

When the petal is stepped on, the leg force is increased by the crank and the shaft is turned and transmitted to the wheel. (B) Therefore, it is hard to get tired even when traveling uphill or traveling a long distance. (C) Even people with weak leg strength, such as the elderly, the disabled, the sick, and the injured, are less likely to get tired during normal running. (D) Energy saving when attached to an electric assisted bicycle.

[Brief description of the drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a left side view of the present invention.

FIG. 3 is a right side view of the present invention.

[Explanation of symbols]

 1 left crank 2 right crank 3 axis 4 petal 5 saddle

Claims (1)

[Claims] 1. The upper and lower surfaces of a left crank (1) of a bicycle are bent at an angle with high rotational efficiency, and the upper and lower surfaces of a right crank (2) are bent at opposite angles with high rotational efficiency. When you step on the petals (4) attached to both cranks, the leg strength is increased by the cranks and the shaft is turned and transmitted to the wheels, so that the bicycle can be moved with less labor.