Chair

Abstract

A chair in which a backrest can be largely tilted rearward within a small rotation angle range without increasing the heights of a leg body and a seat body. The leg body ( 1 ) includes a pair of left and right side-legs ( 9 ) of angular shape in side view, each having a front leg ( 9 a ) tilting forward and downward and a rear leg ( 9 b ) tilting backward and downward. The lower end of a backrest support frame ( 3 ) is so pivotally mounted on the leg body ( 1 ) at an appropriate position under the seat body ( 2 ) as to be capable of tilting rearward between the left and right side-legs ( 9 ).

1 - 12 . (canceled) 
   
   
       13 . A chair comprising:
 a seat;   a backrest standing at a rear end of the seat;   a pair of backrest support frame supporting the backrest on a front surface; and   a leg unit supporting the seat and comprising a pair of side legs, each of the side legs comprising a front leg portion and a rear leg portion, a distance between the front leg portions gradually becoming greater forward, a distance between the rear leg portions gradually becoming greater rearward, each of the rear leg portions being longer than each of the front leg portions, each of the pair of backrest support frames being pivotally mounted to each of the pair of side legs under the seat so that the backrest support frame can be tilted rearward between the side legs.   
   
   
       14 . The chair of  claim 13 , further comprising a pair of shorter shafts, each of which is positioned at a top of each of the side legs between the front leg portion and the rear leg portion, the backrest support frame being tilted around the shorter shafts. 
   
   
       15 . The chair of  claim 14  wherein a pair of arms that is provided at lower ends of the pair of backrest support frames is pivotally mounted to the pair of side legs at almost equal height to the top of the side legs. 
   
   
       16 . A chair comprising:
 a seat;   a leg unit supporting the seat and comprising a pair of side legs, each of the side legs comprising a front leg portion and a rear leg portion, a distance between the front leg portions gradually becoming greater forward, a distance between the rear leg portions gradually becoming greater rearward, each of the rear leg portions being longer than each of the front leg portion;   a support base provided on the leg unit and supporting the seat; and   a stretcher provided between tops of the side legs, the support base being provided in the middle of the stretcher.   
   
   
       17 . The chair of  claim 16  wherein the stretcher comprises a lateral rod and a vertical portion at each end, the support base being provided on an upper surface of the lateral rod, upper ends of the vertical portions being fixed to a top of the pair of side legs. 
   
   
       18 . The chair of  claim 17  wherein the vertical portion extends upward and forward to allow the lateral rod to be positioned behind the top of the side legs. 
   
   
       19 . The chair of  claim 16  wherein the front ends of a pair of arms of the backrest support frame is pivotally mounted to each end of the support base so that the backrest support frame can be tilted rearward. 
   
   
       20 . The chair of  claim 18  wherein a front part of the support base projects ahead of a top of the side legs, front side ends of the seat being pivotally mounted to side ends of side legs with a lateral pivot shaft, side ends of a rear part of the seat being pivotally mounted to the arms of the backrest support frame with a lateral pivot shaft.