Chair frame for a folding chair

Abstract

A chair frame for a folding chair in accordance with the present invention comprises at least two leg units and a seat support frame pivotally connected to an upper end of the two leg units. The seat support frame includes a first portion and a second portion, both free ends of the first portion and the second portions of the seat support frame are adjustably connected in such a manner that the first portion and the second portion can be adjusted to approach or move away from each other, so that the length of the frame can be substantially reduced after the folding chair is folded.

1 . A chair frame for a folding chair comprising at least two leg units and a seat support frame pivotally connected to an upper end of the two leg units;  
     wherein the seat support frame includes a first portion and a second portion, both free ends of the first portion and the second portions of the seat support frame are adjustably connected in such a manner that the first portion and the second portion can be adjusted to approach or move away from each other.  
   
   
       2 . The chair frame for a folding chair as claimed in  claim 1 , wherein a sleeve with a smaller diameter as compared to the first portion is inserted in both free ends of the first portion, the sleeve is axially defined with a through hole, the second portion has two hollow free ends for insertion of the sleeves of the first portion, in both free ends of the second portion is inserted an end of a stem, and another end of the stem is slidably inserted in the through hole of the first portion.  
   
   
       3 . The chair frame for a folding chair as claimed in  claim 1 , wherein the first portion of the seat support frame is pivotally connected to one of the two leg units through a positioning member, the positioning member includes a ring slidably mounted on the upper end of the leg unit, on a side of the ring is formed an ear to be pivotally connected to the first portion of the seat support frame, and in the ring is disposed a locking member that is to be elastically retracted into the ring and to be engaged in the leg unit.