Chair with elastically-deformable seat and backrest

Abstract

A chair comprising: a metal frame formed by a plurality of tubular metal elements, including a seat portion having two tubular seat support elements and a backrest portion having two tubular backrest support elements extending upwardly from the seat portion, a flexible seat panel of plastic material with high elasticity, having two lateral tubular portions into which respective tubular seat support elements are inserted, and a flexible backrest panel of plastic material with high elasticity having two lateral tubular portions into which respective tubular backrest support elements are inserted, wherein in a rest condition there is a transverse clearance between the outer edges of the lateral tubular portions of the flexible seat panel and of the flexible backrest panel and the respective tubular support elements, and wherein in a deformed condition said transverse clearance is reduced to zero.

1 . A chair comprising:
 a metal frame formed by a plurality of tubular metal elements, including a seat portion having two tubular seat support elements and a backrest portion having two tubular backrest support elements extending upwardly from the seat portion;   a flexible seat panel of plastic material with high elasticity, having two lateral tubular portions into which respective tubular seat support elements are inserted; and   a flexible backrest panel of plastic material with high elasticity having two lateral tubular portions into which respective tubular backrest support elements are inserted,   wherein, in a rest condition, there is a transverse clearance between the outer edges of the lateral tubular portions of the flexible seat panel and of the flexible backrest panel and the respective tubular support elements and wherein, in a deformed condition, said transverse clearance is reduced to zero.   
     
     
         2 . A chair according to  claim 1 , wherein in the rest condition, said transverse clearance of the lateral tubular portions of the flexible seat panel has a constant value along a longitudinal axis of the respective tubular seat support element. 
     
     
         3 . A chair according to  claim 1 , wherein in the rest condition, said transverse clearance varies along a longitudinal axis of the respective tubular seat support element from a minimum value at a front edge of the flexible seat panel to a maximum value at a rear edge of the flexible seat panel. 
     
     
         4 . A chair according to  claim 1 , wherein in the rest condition, said transverse clearance of the lateral tubular portions of the flexible backrest panel varies in the vertical direction from a minimum value at the lower ends of the lateral tubular portions to a maximum value at the upper ends of the lateral tubular portions of the flexible backrest panel. 
     
     
         5 . A chair according to  claim 4 , wherein the lateral tubular portions of the flexible backrest panel are provided with through-cuts spaced apart in the vertical direction. 
     
     
         6 . A chair according to  claim 1 , wherein said frame comprises two front leg elements having upper ends connected to respective front ends of the tubular seat support elements and two rear leg elements forming a downward extension of the respective tubular backrest support elements, wherein the lower ends of the front leg elements and the rear leg elements are interconnected by means of respective lower longitudinal elements. 
     
     
         7 . A chair according to  claim 6 , wherein the tubular backrest support elements are fixed to respective lateral ends of a rear cross member. 
     
     
         8 . A chair according to  claim 6 , wherein said front leg elements are fixed to respective lateral ends of a front cross member.