| 摘要 |
A bedside table has a base with a vertical tube thereon, a tabletop with a vertical member slidably disposed in the tube, and a locking mechanism which can releasably lock the tube and vertical member against relative movement. The locking mechanism includes a vertical locking surface within the tube, a first positioning surface on the vertical support which faces the locking surface, second and third vertically spaced positioning surfaces facing each other at a location between the first positioning surface and the locking surface, and a plate-like locking member having a first edge portion disposed against the first positioning surface and extending away from the first positioning surface between the second and third positioning surfaces in a direction toward the locking surface, the locking member being pivotal about a horizontal axis in the region of the first positioning surface between locking and release positions in which a second edge portion thereof respectively engages and is spaced from the locking surface. A single spring can be used to both counter-balance the weight of the tabletop and vertical member and yieldably urge the locking member toward its locking position.
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