| 主权项 |
1. A height adjustable seat tube comprising:
an outer tube having a valve unit located in the outer tube and fixed to a closed end of the outer tube, the valve unit extending toward an open end of the outer tube; an inner tube inserted into the outer tube from the open end of the outer tube and the valve unit located in the inner tube, the inner tube movable linearly between the outer tube and the valve unit, an end cap fixed to a first end of the inner tube and co-movable linearly with the inner tube, the valve unit extending through the end cap, the inner tube having an inlet valve connected to a second end thereof; an oil tube having a first end connected to the inlet valve and a second end of the oil tube accommodating the valve unit, the oil tube being co-movable linearly with the inner tube, a first oil room being defined between the oil tube and the valve unit, and an oil storage member being an elongate tube and made by resilient material, the oil storage member mounted to the oil tube, a first end of the oil storage member fixed to a connection member and a second end of the oil storage member fixed to the end cap, a first air room defined between the inlet valve, the oil storage member and the inner tube, a second oil room defined between the oil tube, the oil storage member and the end cap, an oil path being in communication between the first and second oil rooms, oil in the first oil room flowing into the second oil room via the valve unit and the end cap by operation of the valve unit. |
