Floor sweeper

Abstract

A floor sweeper includes a sweeper head defining therein a dust chamber, sweeping rollers mounted around all sides of the sweeper head and powered by a motor to direct dust into the dust chamber, and electric fans mounted in the sweeper head for inducing currents of air toward the inside of the sweeper head to offset outward flowing currents induced during the rotation of the sweeping rollers so as to prevent outside dust from flying about to cause secondary contamination.

1 . A floor sweeper, comprising:
 a sweeper head defining therein a dust chamber;   a plurality of sweeping rollers mounted around peripheral sides of said sweeper head and coupled to one another;   a motor adapted for rotating said sweeping rollers to direct dust from a floor into said dust chamber; and   at least one electric fan mounted in said sweeper head and adapted for inducing currents of air toward the inside of said sweeper head to offset outward flowing currents induced when the sweeping rollers are rotated.   
     
     
         2 . The floor sweeper as claimed in  claim 1 , wherein said sweeper head further comprises a top cover shell having a retaining hole, a handle pivotally connected to said top cover shell, and a bottom cover shell pivotally connected to a bottom wall of said top cover shell and biasable relative to said top cover shell between a closed position and an open position, said bottom cover shell having a springy hook rod adapted for hooking in said retaining hole to lock said bottom cover shell to said top cover shell in said closed position. 
     
     
         3 . The floor sweeper as claimed in  claim 1 , wherein said at least one electric fan is mounted in a top side of said sweeper head. 
     
     
         4 . The floor sweeper as claimed in  claim 1 , wherein said at least one electric fan is mounted in a rear side of said sweeper head. 
     
     
         5 . The floor sweeper as claimed in  claim 1 , wherein said at least one electric fan is mounted in two opposite lateral sides of said sweeper head. 
     
     
         6 . The floor sweeper as claimed in  claim 1 , wherein said sweeping rollers each have a plurality of bundles of brushes mounted on the periphery thereof. 
     
     
         7 . The floor sweeper as claimed in  claim 1 , wherein each said sweeping roller has a rubber scraper blade protruding from the periphery thereof. 
     
     
         8 . The floor sweeper as claimed in  claim 1 , wherein each said electric fan comprises a pop-up type fan bracket, a fan blade mounted in said pop-up type fan bracket and a filter element mounted in said pop-up type fan bracket over said fan blade. 
     
     
         9 . The floor sweeper as claimed in  claim 1 , wherein each said electric fan is a turbo fan. 
     
     
         10 . The floor sweeper as claimed in  claim 1 , wherein each said electric fan is an axial-flow fan.