| 摘要 |
A locking means for locking an inner tube to an outer tube by using a vertical sliding block and a horizontal sliding block which are intimately matched together so that a vertical motion of the vertical sliding block can be transformed into a horizontal motion of a locking pin for locking or unlocking the tubes is disclosed. The invention further discloses a retractable pull-handle system that contains such a locking mechanism for use on wheeled luggage cases. Inclined surfaces are provided on the vertical and the horizontal sliding blocks such that when they are intimately mated together in a lock housing, vertical movement of a pull cable can be converted to horizontal movement of a locking pin.
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