| 摘要 |
<p>A crank mechanism utilized for a bicycle or a combustion engine or the like, in which a planetary shaft (3) is provided at the utmost end of a crank arm (7) and an arm is fixed to the planetary shaft, so that when the utmost end of the arm is subjected to a force, the crank shaft in association with the arm is given a torque, the arm being provided, for example, horizontally so as to rotate the crank shaft while moving in parallel keeping the posture of the arm, whereby such a moving arm applies a torque to the crank arm even at the dead point and torque and total torque both become larger.</p> |
