Chair assembly

Abstract

A chair assembly includes a base, a tubular post, a rotary support, and a seat unit. The tubular post extends upwardly from the base and is inclined by an angle of about 45-80 degrees with respect to the base. The rotary support includes a seat support frame, and a rotary shaft extending downwardly from the seat support frame and inserted rotatably into the tubular post. The seat unit includes a looped seat frame mounted on the seat support frame.

What is claimed is: 
     
         1 . A chair assembly comprising:
 a base;   a tubular post that extends upwardly from said base and that is inclined by an angle of about 45-80 degrees with respect to said base;   a rotary support including a seat support frame, and a rotary shaft extending downwardly from said seat support frame and inserted rotatably into said tubular post; and   a seat unit including a looped seat frame mounted on said seat support frame.   
     
     
         2 . The chair assembly of  claim 1 , wherein said looped seat frame is a non-circular looped frame. 
     
     
         3 . The chair assembly of  claim 2 , wherein said looped seat frame includes two opposite first rod sections, and two opposite second rod sections connected between said first rod sections, a width between said second rod sections being larger than that between said first rod sections. 
     
     
         4 . The chair assembly of  claim 3 , wherein each of said first and second rod sections has a mid part connected to said seat support frame, and two end portions extending oppositely from said mid part, each of said first and second rod sections being curved outwardly at said mid part and extending inwardly and gradually from said mid part to said two end portions. 
     
     
         5 . The chair assembly of  claim 3 , wherein said seat support frame has an intersection connected to said rotary shaft, two first frame rods that extend curvedly, upwardly and symmetrically in two opposite directions from said intersection to said looped seat frame, and two second frame rods extending curvedly, upwardly and symmetrically in two opposite directions from said intersection to said looped seat frame and transverse to said first frame rods. 
     
     
         6 . The chair assembly of  claim 5 , wherein said second frame rods are shorter than said first frame rods, said first frame rods are connected respectively to said first rod sections, and said second frame rods are connected respectively to said second rod sections. 
     
     
         7 . The chair assembly of  claim 5 , wherein said intersection is connected to said first frame rods as one piece, said intersection having two branch tubes extending in opposite directions that are transverse to said first frame rods, said second frame rods being connected removably and respectively to said branch tubes. 
     
     
         8 . The chair assembly of  claim 5 , wherein said seat support frame further has a plurality of bracket plates, each of which is disposed on top of one of said first and second frame rods, and each of which is placed in abutment with and screwed to one of said first and second rod sections. 
     
     
         9 . The chair assembly of  claim 2 , wherein said looped seat frame is divided into two separable frame parts that are interconnected detachably. 
     
     
         10 . The chair assembly of  claim 1 , wherein said seat unit further includes a fabric component having a lateral sleeve portion attached to said looped seat frame and a main portion surrounded by said lateral sleeve portion and suspended from said looped seat frame. 
     
     
         11 . The chair assembly of  claim 1 , wherein said base has two spaced apart front legs extending forwardly from a bottom end of said tubular post, a rear leg extending rearward from said bottom end of said tubular post, and two spaced apart side legs each extending sideward from said bottom end of said tubular post between said rear leg and one of said front legs, said front legs being longer than said rear leg and said side legs. 
     
     
         12 . The chair assembly of  claim 11 , wherein said front legs are inclined symmetrically with respect to a central line extending along said rear leg, each of said front legs has a first section extending from said tubular post, and a second section bent from said first section, and an angle between said first section and said central line is larger than an angle between said second section and said central line. 
     
     
         13 . The chair assembly of  claim 1 , wherein said tubular post has an outer tube fixed to said base, a sleeve that is inserted fittingly into said tubular post and that has an annular flange formed outside said outer tube and abutting against a top end of said outer tube, and a sleeve wall extending into said outer tube from said annular flange, said sleeve wall having a plurality of angularly spaced apart hooks projecting downwardly and inwardly from a bottom end of said sleeve wall, said rotary shaft being inserted into said sleeve wall and having a bottom end formed with an annular groove, said hooks engaging slidably said annular groove. 
     
     
         14 . The chair assembly of  claim 1 , wherein said tubular post is inclined by an angle of about 70 degrees with respect to said base.