| 摘要 |
Disclosed is an air-compressing device (1) for a bicycle (2) to provide pedalling assistance. The cycle is provided with a crankset (200), the device (1) includes at least one cartridge (3) for storing compressed air, and a compression means (6) which is connected to the cartridge (3) and which consists of a means (7) for engaging with the crankset (200) and at least a first (8) and second (9) compression chamber, each of which is provided with an air piston (80, 90). The engagement means (7) is connected to each piston (80, 90) and translatably drives the stroke of each piston so as to carry out compression in the respective chamber (8, 9), and in that the first chamber (8) is connected to the second chamber (9) so as to transfer the compressed air within said first chamber (8) to said second chamber (9) when compression is being carried out in the latter. |
