| 摘要 |
The present invention relates to an air injection device conveniently installed on a bicycle comprising: an air injection unit installed and fixed to a frame rotatably coupled to the wheel of the bicycle for drawing in external air and discharging the air to the wheel of the bicycle if receiving a rotating force; a drive unit geared with a sprocket rotating by a pedal for rotating the wheel of the bicycle for receiving the rotating force from the sprocket and supplying the rotating force for the air injection unit; a selection unit for allowing the drive unit to be selectively connected to and geared with the sprocket; and a fixating unit for installing and fixating the air injection unit robustly to the frame. The present invention facilitates the installation and maintenance by simplifying the configuration of the device, making the operation efficient by operating the device with the rotating force from the sprocket rotating by the pedal, which is a conventional bicycle power unit, and concurrently making other special power units unnecessary so simplifying the structure. Furthermore, the present invention can ensure the generality in using the product because the fixating unit can easily applied to existing bicycles. |
