Desktop liftable platform

Abstract

A desktop liftable platform has a base, a supporting frame, a platform, and a driving device. The base has two side beams and two connecting beams. The supporting frame is connected to the base and has two pivot arms. The pivot arms are respectively connected to the side beams. The platform is connected to the pivot arms of the supporting frame over the base. The driving device is connected to the base and the platform, and has a swing arm and a driving cylinder. The swing arm is pivotally connected to one of the connecting beams and is pivotally connected to the platform. The driving cylinder is pivotally connected to the other one of the connecting beams and has a driving shaft pivotally connected to the swing arm. Then, the platform may move relative to the base by the driving shaft pushing or pulling the swing arm.

What is claimed is: 
     
         1 . A desktop liftable platform comprising:
 a base having
 two side beams being parallel with each other at a spaced interval, and each one of the side beams having a rear end, a middle, and a front end; and 
 two connecting beams, one of the two connecting beams connected to the rear ends of the side beams, and the other one of the connecting beams connected to the middles of the side beams; 
   a supporting frame connected to the base and having
 two pivot arms, each one of the pivot arms having
 a bottom end, the bottom end of one of the pivot arms connected to a corresponding one of the side beams adjacent to the front end of the corresponding side beam, and the bottom end of the other one of the pivot arms connected to the other one of the side beams adjacent to the front end of said the other side beam; and 
 a top end; 
 
   a platform connected to the top ends of the pivot arms of the supporting frame over the base; and   a driving device connected to the base and the platform and having
 a swing arm pivotally connected to the connecting arm that is connected to the middles of the side beams, and pivotally connected to a bottom of the platform; and 
 a driving cylinder pivotally connected to the connecting beam that is connected to the rear ends of the side beams, and having a driving shaft pivotally connected to the swing arm. 
   
     
     
         2 . The desktop liftable platform as claimed in  claim 1 , wherein the driving device has an adjuster electrically connected to the driving cylinder, securely deposited on a side of the platform, and having multiple adjusting buttons to drive the driving shaft to move the platform upwardly or downwardly relative to the base. 
     
     
         3 . The desktop liftable platform as claimed in  claim 1 , wherein the platform has a shelf deposited on the bottom of the platform. 
     
     
         4 . The desktop liftable platform as claimed in  claim 1 , wherein
 the supporting frame has two holding panels;   one of the holding panels is deposited on the top end of one of the pivot arms, and the other one of the holding panels is deposited on the top end of the other one of the pivot arms; and   the bottom of the platform is securely connected to the holding panels to enable the platform to move relative to the base by the pivot arms.   
     
     
         5 . The desktop liftable platform as claimed in  claim 1 , wherein the base has at least one reinforced beam connected to the connecting beams between the side beams, and the at least one reinforced beam is parallel with the side beams. 
     
     
         6 . The desktop liftable platform as claimed in  claim 1 , wherein the base has two reinforced beams connected to the connecting beams and at spaced intervals between the side beams. 
     
     
         7 . The desktop liftable platform as claimed in  claim 6 , wherein
 a bottom end of the swing arm is deposited between the reinforced beams adjacent to the connecting beam that is connected to the middles of the side beams; and   a bottom end of the driving cylinder is deposited between the reinforced beams adjacent to the connecting beam that is connected to the rear ends of the side beams.   
     
     
         8 . The desktop liftable platform as claimed in  claim 2 , wherein
 the supporting frame has two holding panels;   one of the holding panels is deposited on the top end of one of the pivot arms, and the other one of the holding panels is deposited on the top end of the other one of the pivot arms; and   the bottom of the platform is securely connected to the holding panels to enable the platform to move relative to the base by the pivot arms.   
     
     
         9 . The desktop liftable platform as claimed in  claim 3 , wherein
 the supporting frame has two holding panels;   one of the holding panels is deposited on the top end of one of the pivot arms, and the other one of the holding panels is deposited on the top end of the other one of the pivot arms; and   the bottom of the platform is securely connected to the holding panels to enable the platform to move relative to the base by the pivot arms.   
     
     
         10 . The desktop liftable platform as claimed in  claim 5 , wherein
 the supporting frame has two holding panels;   one of the holding panels is deposited on the top end of one of the pivot arms, and the other one of the holding panels is deposited on the top end of the other one of the pivot arms; and   the bottom of the platform is securely connected to the holding panels to enable the platform to move relative to the base by the pivot arms.   
     
     
         11 . The desktop liftable platform as claimed in  claim 2 , wherein the base has at least one reinforced beam connected to the connecting beams between the side beams, and the at least one reinforced beam is parallel with the side beams. 
     
     
         12 . The desktop liftable platform as claimed in  claim 3 , wherein the base has at least one reinforced beam connected to the connecting beams between the side beams, and the at least one reinforced beam is parallel with the side beams. 
     
     
         13 . The desktop liftable platform as claimed in  claim 4 , wherein the base has at least one reinforced beam connected to the connecting beams between the side beams, and the at least one reinforced beam is parallel with the side beams. 
     
     
         14 . The desktop liftable platform as claimed in  claim 2 , wherein the base has two reinforced beams connected to the connecting beams and at spaced intervals between the side beams. 
     
     
         15 . The desktop liftable platform as claimed in  claim 3 , wherein the base has two reinforced beams connected to the connecting beams and at spaced intervals between the side beams. 
     
     
         16 . The desktop liftable platform as claimed in  claim 4 , wherein the base has two reinforced beams connected to the connecting beams and at spaced intervals between the side beams.