Collapsible article

Abstract

A collapsible chair may include a frame comprising a pair of Y-brace frames, a pair of X-brace frames arranged generally orthogonally relative to the Y-brace frames, and a foldable seat side member. A collapsible article of furniture may include a pair of Y-brace frames where each of the Y-brace frames includes a pair of Y-shaped assemblies and each assembly includes a crossing member and a support brace member pivotally intersecting the crossing member along its length and the crossing members of each of the Y-shaped assemblies may pivotally engage one another and extend to opposing support brace members and the crossing members may be slidably coupled to the opposing support brace members. A collapsible chair may include a pair of arching wire supports and a back rest, comprising a membrane stretched between the pair of arching wire supports and providing lumbar support.

What is claimed is: 
     
         1 . A collapsible chair, comprising:
 a frame comprising:
 a pair of Y-brace frames; 
 a pair of X-brace frames arranged generally orthogonally relative to the Y-brace frames; and 
 a foldable seat side member. 
   
     
     
         2 . The chair of  claim 1 , wherein, in an expanded position of the chair, the pair of Y-brace frames are canted rearward as they extend from bottom to top. 
     
     
         3 . The chair of  claim 2 , wherein the pair of Y-brace frames pivotally engage the seat side member at approximately ¼ points along the length of the seat side member. 
     
     
         4 . The chair of  claim 3 , wherein the seat side member is foldable by a collapse hinge arranged at approximately the midpoint of the seat side member. 
     
     
         5 . The chair of  claim 1 , wherein the chair includes an armrest member arranged generally parallel to the seat side member and spaced generally vertically therefrom. 
     
     
         6 . The chair of  claim 5 , wherein the armrest member includes a collapse hinge. 
     
     
         7 . The chair of  claim 6 , wherein the seat side member and the armrest member are coupled to one another with a tie member. 
     
     
         8 . A collapsible article, comprising:
 a pair of Y-frames, each of the Y-frames including a pair of Y-shaped assemblies, each assembly comprising:
 a crossing member; and 
 a support brace member pivotally intersecting the crossing member along its length, 
   
       wherein, the crossing members of each of the respective Y-shaped assemblies pivotally engage one another and extend to opposing support brace members, the crossing members being slidably coupled to the opposing support brace members. 
     
     
         9 . The article of furniture of  claim 8 , wherein, in an expanded position, the crossing members form a relatively shallow angle relative to a horizontal. 
     
     
         10 . A collapsible chair, comprising:
 a pair of arching wire supports; and   a back rest, comprising a membrane stretched between the pair of arching wire supports and providing lumbar support.   
     
     
         11 . The chair of  claim 10 , further comprising a guide member for the pair of arching wire supports, the guide member being arranged on an armrest of the chair.