| 摘要 |
<p>The present invention relates to a telescopic extendable pipe that can slide an inner pipe inside an outer pipe in an overlapped state to vary the length thereof. The telescopic extendable pipe includes an inner pipe (3) formed with a plurality of locking grooves (11); an outer pipe (5) slidably engaged to the inner pipe (3); and a locker (7) locked to or unlocked from the locking grooves (11) to lock or unlock the inner pipe (3) and the outer pipe (5). The locker (7) has a guide tube (21) for guiding the sliding movement of the inner pipe (3), a stopper (23) protruding toward the inner surface of the guide tube (21) to be locked to or unlocked from the locking groove (11), a holding portion (25) engaged to the guide pipe (21) to be able to reciprocate in the longitudinal direction, a pressing boss (27) for locking or unlocking the stopper (23) to or from the locking groove (11), a return member (29) compressed or restored by the holding portion (25) to return the holding portion (25) to its original position, and a holding portion guide (31) for guiding the holding portion (25) to be able to reciprocate in a state in which the holding portion is not rotated from the outer surface of the guide pipe (21). Since the holding portion is guided by the holding portion guide and is moved along the guide pipe in the state of being not rotated, the stopper is smoothly pressed and is locked to or unlocked from the locking groove.</p> |
