Height adjusting structure for desk

Abstract

A height adjusting structure for a desk is applied to adjust a height of a desktop which is connected with two first supporting tubes fitted with two second supporting tubes and contains: a through hole defined adjacent to a top end of each second supporting tube to expose each first supporting tube fitted in each second supporting tube; two adjustors arranged adjacent to two top ends of the two second supporting tubes. Preferably, one of the two adjustors has a swing lever disposed thereon to drive a driving gear and has a driven gear driven by the driving gear, and the other of the two adjustors has a driven gear fixed therein and simultaneously rotating with the driven gear of one of the two adjustors through a connecting rod.

1 . A height adjusting structure for a desk with two supports being applied to adjust a height of a desktop which is connected at two opposed bottom side ends thereof with two first supporting tubes fitted with two second supporting tubes and comprising:
 a through hole defined adjacent to a top end of each second supporting tube to expose each first supporting tube fitted in each second supporting tube; two adjustors arranged adjacent to two top ends of the two second supporting tubes, wherein one of the two adjustors has a swing lever disposed thereon to drive a driving gear and has a driven gear driven by the driving gear, and the other of the two adjustors has a driven gear fixed therein and simultaneously rotating with the driven gear of one of the two adjustors through a connecting rod, such that two driven gears of the two adjustors engage with two toothed sections of the two first supporting tubes, and after the swing lever is rotated clockwise or counterclockwise, the driving gear is driven by the swing lever to rotate clockwise or counterclockwise, then the two driven gears are driven to rotate simultaneously through the connecting rod and to movably engage with the two toothed sections of the two first supporting tubes, thus moving the two first supporting tubes upwardly and downwardly to adjust a height of the desktop.   
     
     
         2 . The height adjusting structure for the desk as claimed in  claim 1 , wherein the two second supporting tubes includes two holders disposed on two bottom ends thereof. 
     
     
         3 . The height adjusting structure for the desk as claimed in  claim 1 , wherein the two second supporting tubes includes two holders disposed on two bottom ends thereof, and each holder has two movable rollers fixed on a bottom end thereof to move the desk. 
     
     
         4 . A height adjusting structure for a desk with a single center support being employed to adjust a height of a desktop which is connected at a bottom center end thereof with a single first supporting tube fitted with a single second supporting tube and comprising: a through hole defined adjacent to a top end of the second supporting tube to expose the first supporting tube fitted in the second supporting tube; an adjustor arranged adjacent to a top end of the second supporting tube, wherein the adjustor has a swing lever disposed thereon to drive a driving gear and has a driven gear driven by the driving gear, and the driven gear movably engages with a toothed section of the first supporting tube, thereby adjusting a height of the desktop. 
     
     
         5 . The height adjusting structure for the desk as claimed in  claim 4 , wherein the second supporting tube includes a holder with a center part of said holder disposed on a bottom end thereof.