Chair adjustment device

Abstract

A chair adjustment device is disposed on a bottom of a chair seat. The chair adjustment device has a control rod and a handle device. The control rod has two protruded blocks. The handle device has a shaft, a ball-shaped head connected to the shaft, a through aperture, an inner groove, an inner recess, and an end hole communicating with the through aperture. A cover plugs on the end hole of the handle device. The control rod is inserted in the handle device.

I claim:  
     
         1 . A chair adjustment device comprises: 
 a control rod and a handle device,    the handle device having a hollow shaft and an aperture,    the control rod inserted in the hollow shaft, and    the handle device being moved along the control rod.    
     
     
         2 . The chair adjustment device as claimed in  claim 1 , wherein the aperture is in a round shape.  
     
     
         3 . The chair adjustment device as claimed in  claim 1 , wherein the aperture is in a rectangular shape.  
     
     
         4 . The chair adjustment device as claimed in  claim 1 , wherein the handle device has an annular slot and a U-shaped elastic element is inserted in the annular slot of the handle device.