Patent ID: 8434780

Claim:
A rollator, comprising: a base frame; front wheel assemblies and rear wheel assemblies respectively mounted on both sides of the base frame; an inverted U-shaped supporting pipe having a pair of side arms; an H-shaped armrest bracket; connection pieces having block grooves thereon; a slide control lever for cooperating with the block grooves; a seat plate; and a spring element; wherein the base frame is provided with unidirectional hinged seats; both bottom ends of the supporting pipe are hinged to the base frame, and both side arms of the supporting pipe are provided with slide holes facing each other; the armrest bracket has bottom portions respectively hinged to the unidirectional hinged seats; one end of each of the connection pieces is connected to the armrest bracket, while the other end of each of the connection pieces is hinged to the supporting pipe at a position below the slide holes; both ends of the slide control lever are respectively received in the slide holes on both side arms of the supporting pipe; one end of the spring element is mounted on the supporting pipe, while the other end is mounted on the slide control lever; one end of the seat plate is hinged to the armrest bracket, while the other end is a free end leaning on the supporting pipe.