| 摘要 |
The present invention relates to a power transmission apparatus for a bicycle, which enables power transmission to be performed with a new method and change of speed to be performed without shifting. Provided is the power transmission apparatus for a bicycle, which comprises: a power transmission pulley composed of a return spring; a cam mounted to be equally rotated with a crank shaft; a rotation flange wherein a first shaft insertion hole through which the crank shaft is penetrated is formed; a guide flange wherein a second shaft insertion hole through which the crank shaft is penetrated is formed; a drive wire fixated by a drive wire fixing pin; and a hook mounted on a surface which adheres to the rotation flange by means of a hinge. |
