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Retractable tube assembly

  • US 20060193679A1
  • Filed: 02/25/2005
  • Published: 08/31/2006
  • Est. Priority Date: 02/25/2005
  • Status: Abandoned Application
First Claim
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1. A retractable tube assembly comprising:

  • an inner tube having a non-circular cross section, a top end, and a bottom end;

    an elastic locating ring, which is fastened to the bottom end of said inner tube and is substantially in flush with a periphery of said inner tube;

    a rotary actuating member mounted inside said locating ring and rotatable relative to said locating ring between a locking position and an unlocking position, said rotary actuating member having a center through hole axially extending through top and bottom sides thereof and at least one radially protruding major axis portion;

    an outer tube having a top end sleeved onto the bottom end of said inner tube, a cross section fitting said inner tube, an inside wall facing a periphery of said locating ring, and a bottom end; and

    a rotary knob pivotally coupled to the bottom end of said outer tube, said rotary knob having a link inserted through the center through hole of said rotary actuating member for rotating said rotary actuating member between said locking position where said locating ring is peripherally forced against the inside wall of said outer tube to lock said outer tube to said inner tube and said unlocking position where said locating ring is peripherally spaced from the inside wall of said outer tube for enabling said outer tube to be moved axially relative to said inner tube.

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