Removable blade of fan

Abstract

Removable blades of fan include a rear base, a front cover corresponding to the rear base, and a plurality of frames covered with a plurality of sponge blades. Each of a plurality of sponge blades is inserted through a frame while a lug is positioned on one end of the frame. A flapper is arranged between the lug and the frame. Each of the frame is mounted between the rear base and the front cover by the lug. The front cover and the rear base, together with the sponge blades extending outward so as to form a casing for the main body of the fan.

What is claimed is:  
     
         1 . Removable blades of fan comprising 
 a rear base,    a front cover corresponding to the rear base,    and a plurality of frames covered with a plurality of sponge blades;    wherein the rear base and the front cover are disposed on a turning axle with a plurality of bracket frames arranged annularly thereof respectively; a slot is positioned on one end of the bracket frame which has an opening;    each of a plurality of sponge blades is inserted through a frame while a lug is positioned on one end of the birn; a flapper is arranged between the lug and the frame;    each of the frame is mounted on the bracket frame of the rear base and the front cover by the lug and the flapper is mounted into the slot so as to connect the front cover and the rear base, together with the sponge blades extends outward, thus form a casing for the main body of the fan.    
     
     
         2 . The removable blades of fan as claimed in  claim 1 , wherein a blade-intake groove is arranged on the outer side of the slot of the bracket frame for mounting one end of the sponge blade.  
     
     
         3 . The removable blades of fan as claimed in  claim 1 , wherein a mounting hole is positioned on the lug of the frame while a locating plug is disposed on at least one bracket frame of the front cover or rear base; the locating plug inserts through the mounting hole for fixing the frame firmly.  
     
     
         4 . The removable blades of fan as claimed in  claim 1 , wherein at least a hole is disposed on the frame for connecting the sponge blade.  
     
     
         5 . The removable blades of fan as claimed in  claim 1 , wherein a ventricular end plate is disposed on one end of the frame.  
     
     
         6 . The removable blades of fan as claimed in  claim 1 , wherein the flapper having a step-like part.  
     
     
         7 . The removable blades of fan as claimed in  claim 1 , wherein at least a projecting rib is arranged on each of the lateral side of the frame; the projecting rib is tapered from the end of the frame with the lug to the other end with the end plate and is inclined at a certain angle −θ to the frame.  
     
     
         8 . The removable blades of fan as claimed in  claim 1 , wherein a bolt is positioned on the center of a block cover on the center of the front cover.