| 摘要 |
PURPOSE: A bicycle is provided to drive forward without lateral shaking by removing center angle difference between left and right crank arms. CONSTITUTION: A bicycle comprises a frame(F), a crank shaft, crank arms(CA), pedals(P), a driving rotator(DM), a driven rotator(PM), an electric member(T), a handle, and a saddle. A front wheel(W1) and a rear wheel(W2) are coupled to the front and rear ends of the frame. The crank shaft is rotationally coupled to the bottom of the frame between the front and rear wheels. One end of the crank arms is coupled to both ends of the crank shaft, and the other end thereof is coupled to the pedals. The driving rotator rotates on the crank shaft. The driven rotator rotates on the rotation center of the rear wheel. The electric member connects the driving rotator and the driven rotator. A counteraction unit is arranged between a crank shaft integrating member and the frame to receive the reverse rotation of the crank shaft integrating member.
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