| 摘要 |
<p>An inflator attached on a bicycle, comprises a cylinder, a piston, a cam, a hollow transmission bolt, a movable shaft and a gear. The cam has a stud projected on its upper portion for inserting into a hole on the lower end of the piston rod, and has a bore on its lower portion for being connected with the transmission bolt. The movable shaft is inserted into transmission bolt and has the gear fixed on its front end. The bicycle tire can be inflated by the backward idling of the chainwheel.</p> |
