| 摘要 |
An adjustable support member in which an inner tube (3) is slidably and telescopically mounted in an outer tube (1). Relative axial movement between the inner tube (3) and the outer tube (1) is prevented by a locking mechanism actuated by a movable end cap (6) connected by an actuator rod (9) to a cup (8) mounting balls (12) which protrude through holes therein. A cone (4) is fitted into the free end of the inner tube (3). A spring (7) acts against a collar (11) fitted to the actuator rod (9) to draw the cup (8) towards the cone (4) thereby forcing the balls (12) to jam against the inside surface of the outer tube (1) and axially fix the position of the inner tube (3) relative to the outer tube (1). |
