| 摘要 |
<p>An assembly for telescoping tubes, in particular intended for forming a white cane for the blind, in which, between each pair of adjacent tubes (1,2), locking means are provided comprising leaf springs (9,10) arranged in a cap (3) which is fixed on the extremity of the inner tube (1) of said pair, the inner part (9) of each spring normally being situated at some distance from the bottom (4) of said cap (3), and the outer extremity (10) extending beyond the outer wall of said inner tube (1) and being adapted to engage a shoulder portion of a groove (11) in the inner wall of the outer tube (2) of said pair, thus providing a locking between said tubes (1,2), the inner extremity of the next narrower tube (1 min ) penetrating into said cap (3) when being pushed inwards, then pulling said lead springs (9,10) sufficiently inwards for releasing said locking engagement.</p> |
