| 摘要 |
<p>A height adjustable seat tube includes an outer tube (10) and an inner tube (20) is inserted into the outer tube (10). An end cap (21) is fixed to the inner tube (20) and a valve unit (11) in the inner tube (20) extends through the end cap (21) and co-movable linearly with the inner tube (20). An inlet valve (22) is connected to the inner tube (20). An oil tube (30) is connected between the inlet valve (22) and the valve unit (11). A first oil room (31) is defined between the oil tube (30) and the valve unit (11). An oil storage member (40) is connected between a connection member (41) and the end cap (21). A first air room (23) is defined between the inlet valve (22), the oil storage member (40) and the inner tube (20). A second oil room (45) is defined between the oil tube (30), the oil storage member (40) and the end cap (21). An oil path (46) is in communication between the first (31) and second (45) oil rooms.</p> |
