| 摘要 |
<p>The rod has an outer tube coaxial and telescopic with an inner tube (2). A spring (3) is mounted within the tubes, where the spring includes a set of zones (31, 32) provided with a hook (4) in sliding contact in a sliding direction of the outer tube with respect to the inner tube, and in blocking contact in a direction opposite to the sliding direction. Another set of zones (30, 33) of the spring is linked to an inner wall of the inner tube, where the external diameter of the latter set of zones is lower than that of the former set of zones of the spring.</p> |
