Type of simple folding chair

Abstract

A folding chair that includes a frame and seat and back fabric supported by the frame. The frame includes primary leg frames and secondary leg frames that cross-hinge on both sides, and the lower sections hinge to a pair of backrest bars of the secondary leg frames. There is a support ring or armrest bars at the hinges between the primary leg bars and the backrest bars to form traction to the backrest bars and to provide armrest function.

I claim: 
     
         1 . A folding chair that includes a frame and seat fabric supported by the frame;
 the frame includes primary leg bars, secondary leg bars, and backrest bars;   the primary leg bars, the secondary leg bars, and the backrest bars form a u-shaped structure, and the leg bars on both sides of the primary leg bars and secondary leg bars cross-hinge to form the support;   the lower sections of a pair of said backrest bars hinge to the top sections of the secondary leg bars;   it is also equipped with a support ring, where the front part of the support ring hinges to the top sections of the primary legs and the back part hinges to the top sections of the backrest bars, and both ends form the armrests;   the hinges of the backrest bars and the second leg bars can be lifted and closed toward the front parts of hinges between the primary leg bars and the armrest bars to form a folded structure;   the seat fabric is divided into seat area and backrest area; and   the front edge of the seat area and the upper edge of the backrest area hang on to the front and back edges of the support ring.   
     
     
         2 . The chair in  claim 1 , wherein the u-shaped bottom bars of the primary leg bars and secondary leg bars rest of the ground, and the hinges between the upper sections of the secondary leg bars have a horizontal bar; and the connection between the seat area and the backrest area of the seat fabric is anchored on the horizontal bar, and the horizontal bar forms the support and shape of the seat. 
     
     
         3 . The chair in  claim 2 , wherein the seat fabric is formed by the arrangement of multiple woven straps, and forms one of the following structures:
 a) seat area and backrest area have a continuous strap, and the two ends are anchored to the front part and back part of the support ring, respectively;   b) seat area and backrest area have a continuous strap, and the woven strap wraps around the horizontal bar and is sewn into a cover, and the two ends are anchored to the front part and back part of the support ring, respectively;   c) seat area and backrest area have independent seat woven straps and backrest woven straps, the two ends of the seat woven straps are anchored to the front part the support ring and the horizontal bar, and all the seat woven straps near the horizontal bar are cross woven to a side-oriented woven strap;   one end of each of the backrest woven straps is woven to the side-oriented woven strap, while the other end is anchored to the back part of the support ring, and the seat woven straps and the backrest woven straps are alternatively distributed on the side-oriented woven straps; and   d) seat area and backrest area have independent seat woven straps and backrest woven straps, the two ends of the seat woven straps are anchored to the front part the support ring and the horizontal bar, the two ends of the backrest woven straps are anchored to horizontal bar and the back part of the support ring, and the seat woven straps and the backrest woven straps are alternatively distributed on the horizontal bar.   
     
     
         4 . The chair in  claim 3 , wherein:
 the support ring is a closed circle or oval structure;   the two hinge points between the front part of the support ring and the primary legs form an area where the seat cloth fabric is located as a transition;   one end of the woven strap or seat back woven strap is directly sewn to the edge of the seat cloth fabric;   the hinge point between the back part of the support ring and the pair of backrest bars forms an area where the backrest cloth fabric is located as a transition;   one end of the woven strap or seat back woven strap is directly sewn to the edge of the backrest cloth fabric.   
     
     
         5 . The chair in  claim 2 , wherein there are also chain stoppers at the two sides of the hinge points of the primary leg bars and secondary leg bars; and the chain stoppers have one of the following structural options: double hinge plates, traction chains, or woven straps. 
     
     
         6 . A folding chair includes a frame and seat fabric supported by the frame;
 the frame includes primary leg bars, secondary leg bars, and backrest bars;   the primary leg bars, the secondary leg bars, and the backrest bars both form a u-shaped structure, and the leg bars on both sides of the primary leg bars and secondary leg bars cross-hinge to form the support;   the lower sections of a pair of said backrest bars hinge to the top sections of the secondary leg bars;   its special feature is: it is also equipped with a pair of armrest bars, where the front parts of the armrest bars hinge to the top sections of the primary legs and the back part hinges to the top sections of the backrest bars;   the hinges of the backrest bars and the secondary leg bars can be lifted and closed toward the front parts of hinges between the primary leg bars and the armrest bars to form a folded structure;   the seat fabric is divided into seat area and backrest area; and   the seat area is anchored between the upper sections of the primary leg bars and the secondary leg bars, and upper edge of the backrest area hangs on to the upper section of the pair of backrest bars.   
     
     
         7 . The chair in  claim 6 , wherein the primary leg bars and the secondary leg bars is a closed rectangular structure that includes a U-shaped structure. 
     
     
         8 . The chair in  claim 6 , wherein:
 the seat fabric is made of woven straps;   the seat area and the backrest area are independent seat woven straps and backrest woven straps, respectively; and   the two ends of the seat woven straps are anchored to the u-shaped bottom bars of the primary leg bars and secondary leg bars, the two ends of the backrest woven straps are anchored to the u-shaped bottom bars of the secondary leg bars and the backrest bars, and the seat woven straps and the backrest woven straps are alternatively distributed on the u-shaped bottom bar of the secondary leg bars.