The single hand operated back rest mechanism for baby cart includes one foldable four link rod back rest comprising right and left back rest pipes, right and left flat bars and right and left crossed flat bars; one foldable four link rod sectioning device comprising right and left sectioning units with regulating torsion spring, right and left sectioning pins, right and left back rest pipes, right and left foot pipes, right and left seat pipes and right and left support pieces; one single hand operated back rest angle regulating mechanism comprising right and left crossed flat bars, fixing seat, reset spring, button, drive rod, rotating piece, etc. The single hand operated back rest mechanism is simple in structure and easy to operate, and has no increase in cost. |