| 摘要 |
This invention increases effectiveness of power transmission since operation capability of crank gear assembly entity(10) is transmitted directly to the rear wheel(110) according to the operation axis(60). Meanwhile, bicycle operation is made effective. Due to its simple structure, this invention produces many effects such as prevention of malfunction and decreased function even during long term use. In the above mentioned, this invention was explained using specific ideal example, but this invention is not limited to the above mentioned actual example. Anyone with knowledge of the area that this invention belongs to can try diverse transformation without separating the purpose of this invention that is claimed for the scope of utility model registration claim. |
