Chair frame with zero gravity, zero wall leaning and zero displacement

The utility model discloses a zero-gravity zero-wall-leaning zero-displacement chair frame which is characterized in that a track is mounted on a base assembly, the front end of the track is higher than the rear end of the track, and a seat frame assembly is connected in the track in a sliding manner; one end of the backrest connecting rod assembly is hinged to the rear end of the leg supporting assembly, and the other end of the backrest connecting rod assembly is hinged to the rear end of the seat frame assembly. The rear end of the seat frame forward-moving pre-blocking withdrawing assisting mechanism is hung at the rear end of the base assembly, and the front end of the seat frame forward-moving pre-blocking withdrawing assisting mechanism is hung in the middle of the seat frame assembly; a leg supporting assembly is installed at the front end of the seat frame assembly, a front connecting supporting rod is installed at the root of the leg supporting assembly, and the front connecting supporting rod can r