Folding structure for chairs

Abstract

A folding structure for chairs comprising a front support, a first loading member, a rear support, a second loading member and two armrests pivotally engaging with one another to form a folding chair that may be folded or extended rapidly. When the chair is folded, the rear support is located in the first loading member and the first loading member is located in the front support, and the front support and the two armrests are folded towards each other, and the first loading member and second loading member are folded towards each other. The resulting folding chair has a shorter length and smaller thickness, and makes carrying and storing more convenient.

What is claimed is:  
     
         1 . A folding structure for a chair, comprising: 
 a front support having a front bottom section to rest on the ground surface and two symmetrical front flank sections extending from two sides of the front bottom section;    a first loading member having a front end section and two symmetrical first flank sections extending from two sides of the front end section, the first flank sections being pivotally engaged with the front flank sections of the front support at selected pivotal locations;    a rear support having a rear bottom section resting on the ground surface and two symmetrical rear flank section extending from two sides of the rear bottom section, the two rear flank section having respectively a bend section, the bend sections being pivotally engaged with the first flank sections of the first loading member;    a second loading member having a rear end section and two symmetrical second flank section extending from two sides of the rear end section, the second flank section being pivotally engaged with the bend sections; and    two armrests pivotally engaging with the front support and the second loading member such that the chair is pivotally engaged for rapid folding.    
     
     
         2 . The folding structure for a chair of  claim 1 , wherein the front support, the first loading member, the rear support, the second loading member and the armrests are formed by bending rods or tubes.  
     
     
         3 . The folding structure for a chair of  claim 1 , wherein the first flank section of the first loading member has a tenon mounted thereon at a selected location.  
     
     
         4 . The folding structure for a chair of  claim 1 , wherein the second flank sections of the second loading member have a safety latch located thereon.  
     
     
         5 . The folding structure for a chair of  claim 1 , wherein the second flank sections of the second loading member are coupled respectively with a sleeve, the sleeve being pivotally engaged with a side stretcher bar (linkage bar), the stretcher bar (linkage bar) having one end pivotally engaged with the pivotal locations of the front support and the first loading member.  
     
     
         6 . A folding structure for chairs comprising a front support, a first loading member, a rear support, a second loading member and two armrests pivotally engaging with one another to form a folding chair for rapid folding, wherein: 
 the front support has a front bottom section which extends to form two front flank sections with free ends, each of the free ends being coupled with a bushing, the two bushings being bridged by a rear stretcher bar; and    the first loading member and the second loading member are coupled respectively with two loading planes which join at a juncture with a connecting flap extending therefrom to engage with at least one elastic element, the elastic element having one end engaged with the rear stretcher bar to adjust loading conditions of the loading planes when an user sitting on the folding chair.    
     
     
         7 . The folding structure for chairs of  claim 6 , wherein the two loading planes are coupled respectively with the first loading member and the second loading member and join at a juncture with a connecting flap extending therefrom to couple with the rear stretcher bar, the connecting flap being stretchable by the rear stretcher bar to form a loading plane for supporting people when an user sitting on the folding chair.  
     
     
         8 . A folding structure for chairs comprising a front support, a first loading member, a rear support, a second loading member and two armrests pivotally engaging with one another to form a folding chair for rapid folding, wherein: 
 the front support has a front bottom section extending to form two front flank sections which have free ends to form a back end section; and    the first loading member and the second loading member are coupled respectively with two loading planes which join at a juncture with a connecting flap extending therefrom to engage with at least one elastic element, the elastic element having one end engaged with the back end section to adjust loading conditions of the loading planes when an user sitting on the folding chair.