Patent ID: 8684620

Claim:
A push button-controlled retractable bar, comprising: an inner tube comprising a longitudinal sliding groove and at least one series of locating notches located on at least one of two opposite sidewalls 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 slide seat movably mounted in said longitudinal sliding groove and affixed to said outer tube, said slide seat comprising an elongated slot; a positioning spring leaf comprising a mounting axle affixed to said slide seat, at least one first arm portion outwardly extended from said mounting axle, and at least one positioning protrusion outwardly protruded from said at least one first arm portion in a direction toward said at least one series of locating notches of said inner tube; a control device comprising a movable member movably mounted in said longitudinal sliding groove of said inner tube, a push button, and a linking device set between said movable member and said push button, said movable member comprising a push block inserted into said elongated slot of said slide seat and abutted against said at least one first arm portion of said positioning spring leaf, said push button being mounted in said outer tube and movable between a first position where said push block of said movable member pushes said at least one first arm portion of said positioning spring leaf to force said at least one positioning protrusion into engagement with said at least one series of locating notches of said inner tube and a second position where said push button pushes said linking device to carry said movable member in a direction away from said positioning spring leaf for enabling said positioning spring leaf to move said at least one positioning protrusion away from said at least one series of locating notches of said inner tube subject to an elastic restoring force thereof; and an elastic member set between said slide seat and said movable member and adapted to push said movable member in a direction toward said positioning spring leaf.