| 摘要 |
A telescopic tube mounting device, which includes an outer tube having a coupling at the top, an inner tube made to slide in and out of the outer tube and locked at the desired elevation by a lock screw on the coupling, a C-shaped locating ring fastened to the bottom end of the inner tube to prohibit disconnection of the inner tube from the coupling, a stopper sealed in the bottom end of the inner tube and having a longitudinal through hole with a tapered top orifice for passing air in and out of the inner tube to buffer the falling speed of the inner tube when the inner tube is collapsed. |
