Chair Structure

Abstract

A chair structure includes a seat unit having a support leg assembly and a seat; a connecting unit having two linking members and movably connected at one linking member to the seat; a backrest unit movably connected to another linking member of the connecting unit and having a supporting member; and at least two armrests movably connected to two lateral sides of the seat and the backrest units. Each of the armrests has a first and a second movable arm, which are pivotally connected at one end to each other, and at the other end to one lateral side of the seat and the backrest unit, respectively. A stop member is connected to at least one of the two armrests. The chair with movably connected seat unit, connecting unit, backrest unit, and armrests can be converted into a lounge providing a curved configuration in compliance with human body's back curve.

1 . A chair structure, comprising:
 a seat unit including a support leg assembly and a seat connected to the support leg assembly;   a connecting unit including at least a first linking member and a second linking member, the first and the second linking member being pivotally connected at a first end to each other, and the first linking member being movably connected at an opposite second end to a rear edge of the seat;   a backrest unit being movably connected at a lower edge to an opposite second end of the second linking member; and   at least two armrests movably connected to two lateral sides of the seat unit and of the backrest unit; each of the armrests having a first movable arm and a second movable arm, which are pivotally connected at respective first end to each other, and movably connected at respective second end to one lateral side of the seat and the backrest unit, respectively; and at least one of the two armrests having a stop member connected thereto.   
   
   
       2 . The chair structure as claimed in  claim 1 , wherein the support leg assembly of the seat unit is connected to a bottom of the seat, and the support leg assembly of the seat unit is movably connected to two lateral sides of the seat via pivot shafts. 
   
   
       3 . The chair structure as claimed in  claim 1 , wherein the seat of the seat unit and the backrest unit are one-piece padded seat and backrest, respectively. 
   
   
       4 . The chair structure as claimed in  claim 1 , wherein the first and second linking members are two transversely extended long plates defining a curved upper face each, and a receiving space is defined between the first and the second linking member when the connecting unit is in a folded state. 
   
   
       5 . The chair structure as claimed in  claim 1 , further comprising two stop cover plates being removably connected to two lateral sides of the first and second linking members when the connecting unit is in a folded state. 
   
   
       6 . The chair structure as claimed in  claim 1 , wherein the backrest unit is movably provided on a rear upper side with at least one supporting member. 
   
   
       7 . The chair structure as claimed in  claim 1 , further comprising an envelope, and wherein the seat of the seat unit is a seat frame, the backrest unit is a back frame, and the first and the second linking member of the connecting unit each include two substantially curved linking bars; the envelope being covered on the seat frame, the back frame, and the first and second linking members; and the connecting unit in a folded state together with the envelope defining a receiving space between the first and second linking member and the envelope. 
   
   
       8 . The chair structure as claimed in  claim 6 , wherein the backrest unit is provided at a rear side with at least one pivot section, to which the at least one supporting member is pivotally connected. 
   
   
       9 . The chair structure as claimed in  claim 1 , wherein the first and second movable arms as well as the first and second linking members are movably connected to the seat and the backrest unit, respectively, via pivot shafts; the first and the second linking members are pivotally connected at respective first ends to each other via pivot shafts; and the first and the second movable arms are pivotally connected at respective first ends to one another via pivot shaft.