Fast perforated sandpaper-replacing device

Abstract

The present invention discloses a fast-perforated sandpaper-replacing device, which is used to attach a perforated sandpaper to a grinder. The device of the present invention comprises a casing. The casing has a through-hole, an aligner installed on its surface, and a movable member installed thereinside. An elastic element is arranged between the movable member and the bottom of the casing. A perforated sandpaper alignment device, which penetrates the through-hole, is coupled to the movable member. A grinder is aligned to the fast-perforated sandpaper-replacing device with the aligner. When pressed by a force, the grinder further presses down the movable member and the elastic element and moves toward the perforated sandpapers accommodated by the alignment device. Thus, the grinding disc of the grinder can precisely stick onto the topmost perforated sandpaper.

1 . A fast-perforated sandpaper-replacing device, which is used to attach a perforated sandpaper to a grinder and comprises:
 a casing, having a bottom, an aligner installed on the surface thereof and a through-hole;   a movable member, installed inside said casing with an elastic element arranged between said movable member and said bottom;   a positioning seat, coupled to said movable member, and having at least one fixing pole used to skewer said perforated sandpapers and penetrating said through-hole, wherein when pressed by a force, said positioning seat will further press down said movable member and said elastic element and move toward said perforated sandpapers; meanwhile, said grinder is aligned to said perforated sandpaper with said aligner and stuck onto said perforated sandpaper.   
   
   
       2 . The fast-perforated sandpaper-replacing device according to  claim 1 , wherein said aligner is a rod installed to the lateral side of said casing and corresponding to said positioning seat. 
   
   
       3 . The fast-perforated sandpaper-replacing device according to  claim 1 , wherein at least one screw is used to fix said aligner to the surface of said casing. 
   
   
       4 . The fast-perforated sandpaper-replacing device according to  claim 1 , wherein at least one limiting slot and at least one limiting rib corresponding to said limiting slot are respectively formed on said movable member and the inner wall of said casing. 
   
   
       5 . The fast-perforated sandpaper-replacing device according to  claim 1 , wherein at least one positioning hole and at least one positioning protuberance corresponding to said positioning hole are respectively formed on said positioning seat and said movable member and used to position said positioning seat. 
   
   
       6 . The fast-perforated sandpaper-replacing device according to  claim 1 , wherein at least one air vent is formed on the surface of said casing and used to balance the air pressure lest the movement of said movable member be retarded. 
   
   
       7 . The fast-perforated sandpaper-replacing device according to  claim 1 ., wherein said elastic element is a spring. 
   
   
       8 . The fast-perforated sandpaper-replacing device according to  claim 1 , wherein said elastic element is a sponge.