| 摘要 |
<p>The present invention relates to a crank arm (CA), pedals (PL/PR), and foot shaft (FS) of a bicycle. The conventional bicycle has a crank arm and a pedal combined with a crank shaft to be asymmetric. Thus, when riding a bicycle, both feet alternately rotate the pedals. The present invention extends the length of the crank arm on the left side (or the right side) in Fig. 2 when the pedals are not rotated (when you ride on a slope or are riding in electric mode in the case of an electric bicycle) to make the length be the same as the length of the crank arm on the opposite side, and uses the pedal on the right and the foot shaft formed on the end of the crank arm on the left extended at the bottom dead point when the pedals are rotating. Thus, the user can place the feet in parallel as on a motorcycle for a comfortable posture. With the user′s, the buttocks are lifted lightly on a bumpy road to effectively reduce impact or vibration. Thanks to the position of the feet with the user′s, which is not so high, riding stability is increased. Therefore, the present invention for this purpose provides a bicycle with which a crank arm is combined in the shape wherein a pedal is attached and combined to one side as in the conventional bicycle and a support fixture in the shape of a foot shaft is attached and combined to the other side where the crank arm is extended.</p> |
