Patent ID: 8683657

Claim:
A press button-controlled retractable bar, comprising: an inner tube comprising a longitudinal sliding groove and a plurality of locating notches located on a sidewall of said longitudinal sliding groove and spaced along an axial direction of said inner tube; an outer tube axially movably sleeved onto said inner tube; a positioning assembly comprising a sleeve sleeved onto said outer tube, a positioning block accommodated in said longitudinal sliding groove of said inner tube and covered by the outer tube, and a press button movably mounted at said sleeve in an radial direction of the sleeve, wherein said positioning block comprises at least one positioning protrusion and a threaded hole, and wherein said press button comprises a threaded portion engaged with said threaded hole of said positioning block and is movable between a first position where each positioning protrusion of said positioning block is selectively forced into engagement with one of said locating notches of said inner tube to lock said outer tube to said inner tube and a second position where each positioning protrusion of said positioning block is disengaged from said locating notches of said inner tube for allowing said outer tube to be moved axially relative to said inner tube; a spring member disposed between said sleeve and said press button to support said press button in said first position; a sliding device slidably received in said longitudinal sliding groove of said inner tube and connected to and driven by said outer tube for moving along said longitudinal sliding groove of said inner tube; and a stop block affixed to said inner tube at one end of said longitudinal sliding groove of said inner tube, said stop block being engageable with the sliding device to stop the sliding device when said sliding device is moved to the end of said longitudinal sliding groove.