Chassis-free adjustable tilting swivel chair

The utility model relates to the technical field of office swivel chairs, in particular to a chassis-free adjustable tipping swivel chair, and aims to overcome the lag of the prior art and provide thechassis-free adjustable tipping swivel chair. Supporting seat, the upper end of the supporting seat is connected with a seat frame through a rotating shaft; the seat frame is in a < shape; the open end of the seat frame is connected with a backrest through a connecting part; handrails are mounted at the two ends of the connecting part; the method is characterized in that the method is characterized by comprising the following steps; a first connecting piece is arranged at the upper end of the open end of the seat frame, a second connecting piece is arranged at the lower end of the open end ofthe seat frame, a connecting part is installed between the first connecting piece and the second connecting piece, a torsional spring is installed between the connecting part and the second connecting piece, and an angle adju