Seat pad adjustable chair

Abstract

A chair includes a seat portion having two recesses in which two resilient members of the adjustment device are received. A seat pad unit is located on the seat portion and has a left pad and a right pad. The left and right pads are rested on the resilient members. A bearing unit is located at the underside of the seat pad unit and connected to a fixing frame on the seat portion. The left and right pads of the bearing unit are pivotable relative to the seat portion.

What is claimed is: 
     
         1 . A chair comprising:
 a seat portion having two recesses defined in a top thereof and a fixing frame connected to the seat portion and located close to a backrest;   an adjustment device and having a tube with two resilient members connected on two ends thereof, the two resilient members partially received in the recesses;   a seat pad unit having a left pad and a right pad, the seat pad unit located on the seat portion, and   a bearing unit located at an underside of the seat pad unit and the fixing frame extending through the bearing unit, the seat pad unit being pivotable relative to the seat portion.   
     
     
         2 . The chair as claimed in  claim 1 , wherein each of the recesses in the top of the seat portion is a semi-circular recess, a rectangular recess, a square recess or a polygonal recess. 
     
     
         3 . The chair as claimed in  claim 2 , wherein connection holes are defined around each of the recesses. 
     
     
         4 . The chair as claimed in  claim 1 , wherein the fixing frame has a transverse bar and grooves are defined in an outer periphery of the transverse bar. 
     
     
         5 . The chair as claimed in  claim 1 , wherein each of the resilient members is a semi-circular member, a rectangular member, a square member or a polygonal member. 
     
     
         6 . The chair as claimed in  claim 1 , wherein the adjustment unit has protrusions extending therefrom which are fixed to the seat portion by multiple fixing members. 
     
     
         7 . The chair as claimed in  claim 1 , wherein the bearing unit has engaging members, tubular members, bearings and C-clips. 
     
     
         8 . A chair comprising:
 a seat portion having a support rod extending from an underside thereof, a fixing frame connected to the seat portion and located close to a backrest;   an adjustment device having a transverse link and two rods, the transverse link having a central portion thereof pivotably connected to the support rod, a seat pad unit having a left pad and a right pad, the seat pad unit located on the seat portion, the two rods respectively extending from the left pad and the right pad of the seat pad unit, the two rods pivotably connected to two ends of the transverse link, and   a bearing unit located at an underside of the seat pad unit and the fixing frame extending through the bearing unit, the seat pad unit being pivotable relative to the seat portion.   
     
     
         9 . The chair as claimed in  claim 8 , wherein the fixing frame has a transverse bar and grooves are defined in an outer periphery of the transverse bar. 
     
     
         10 . The chair as claimed in  claim 8 , wherein the bearing unit has engaging members, tubular members, bearings and C-clips.