| 摘要 |
<p>The adjustable tube consists of an inner tube (12), an outer tube (10) and a blocking unit (20). The inner tube (12) has a series of notches (14) cut in the periphery along it's length and fits inside the outer tube (10). The blocking unit (20) comprises a tube (22) which has a catch (36) mounted on a flexible arm (34) over a slot (32) and a semicircular and longitudinal frame (44) with a cam (58) and operating button (46). The blocking unit (20) after engagement (38,56) slides into an enlarged housing (18) of the outer tube (10) with the operating button (46) within a slot (64) such that sideways motion and elastic return allows the catch (36) to rise and fall releasing or locking the inner tube (12).</p> |
