| 摘要 |
An end securing device for a telescopic tube includes a vacuum sucker made up of a suction cup, a retaining piece, a control piece, and an activation piece to be mounted to both ends of a telescopic tube thereof respectively wherein the suction cup has a driven post protruding at one side of a conic suction space to be engaged with the retaining piece thereby, and the retaining piece has a registration column and a central through hole in sleeve engagement with a coupling groove of the control piece. The driven post of the suction cup led through an engaging through hole of the control piece is securely screwed up to a linkage rod of the activation piece thereof. In operation, the control piece is rotated to one side via a push block, permitting oblique conic sliding guide plates of the control piece to ascend along stop ribs of the retaining piece till the control piece abuts tight against the activation piece so as to move the driven post thereof and raise upwards the suction cup therewith to form an empty vacuum space at the suction space therein for secure attachment of the suction cup to the surface of walls thereon. Otherwise, the control piece is rotated to the other side to descend the sliding guide plates thereof so as to release the activation piece and the suction cup therewith for air to let in to the suction space thereof to detach the suction cup thereof. Thus, the telescopic tube is easily and quickly adjusted in length by direct stretching or pushing without a spring unit applied therein and securely mounted onto the walls via the vacuum suckers thereof.
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