Patent ID: 9622583
Date: 2017-04-18
CPC Classifications: A47C

Claim:
1. A folding chair, comprising a chair framework and a chair cover ( 18 ) installed on the framework, characterized in that: the framework comprises a back pipe ( 5 ), a rear foot pipe ( 10 ), a seat frame pipe ( 4 ), an armrest pipe ( 1 ), an armrest supporting pipe ( 2 ) and a connecting pipe ( 13 ) respectively arranged on both sides; the back pipe ( 5 ) is respectively provided with a U-shaped hinge ( 16 ), a back sliding piece ( 15 ) and a connection fixing piece ( 9 ) from top to bottom; the back pipe ( 5 ) is rotatably connected with one end of the rear foot pipe ( 10 ) through the connection fixing piece ( 9 ); one end of the connecting pipe ( 13 ) is rotatably connected with the back sliding piece ( 15 ) sleeved on the back pipe ( 5 ); the other end of the connecting pipe ( 13 ) is movably connected with a rear foot sliding piece ( 12 ) sleeved on the rear foot pipe ( 10 ); the middle of the connecting pipes ( 13 ) is rotatably connected with one end of the seat frame pipe ( 4 ); the seat frame pipe ( 4 ) is rotatably connected with the back pipe ( 5 ) through the connection fixing piece ( 9 ); one end of the seat frame pipe ( 4 ) is rotatably connected with the armrest supporting pipe ( 2 ) through a seat frame rotating piece ( 3 ); the other end is rotatably connected with the connecting pipe ( 13 ); a rear crossed pipe ( 17 ) is arranged on the rear part of the framework; one end of the rear crossed pipe ( 17 ) is rotatably connected with the upper part of the back pipe ( 5 ) through the U-shaped hinge ( 16 ); the other end is rotatably connected with one end of the rear foot pipe ( 10 ) through a rear foot connecting piece ( 11 ); the armrest pipe ( 1 ), the armrest supporting pipe ( 2 ), the seat frame pipe ( 4 ) and the connecting pipe ( 13 ) form a rotating quadrangle structure; the back sliding piece ( 15 ) and the rear foot sliding piece ( 12 ) connected on both ends of the connecting pipe simultaneously drive a bracket; and the bracket is folded or unfolded through the angular change of the quadrangle.