Vacuum cleaner

Abstract

Disclosed is a vacuum cleaner, which can prevent dust or foreign objects from flowing backwards. The vacuum cleaner includes a motor to generate a suction force; a suction assembly to suck air including dust or foreign objects and including a first air passage guiding the sucked air; and a dust collection filter to filter the dust or foreign objects from the sucked air, and including a dust collecting container having an opening to receive air from the first air passage of the suction assembly, a guide forming a second air passage provided to guide a flow of the air received through the opening, a shutter provided in the guide to operate, according to the suction force, in an opened mode to open the second air passage or a closed mode to close the second air passage, and a filter configured to filter the foreign objects from the sucked air.

What is claimed is: 
     
         1 . A vacuum cleaner, comprising:
 a motor provided to generate a suction force;   a suction assembly configured to suck air including dust or foreign objects and including a first air passage through which the sucked air moves; and   a dust collection filter configured to filter the dust or foreign objects from the sucked air,   wherein the dust collection filter comprises:
 a dust collecting container having an opening configured to receive the air from the first air passage of the suction assembly, 
 a guide forming a second air passage configured to guide a flow of the air received through the opening of the dust collecting container, 
 a shutter provided in the guide and configured, according to the suction force, to:
 operate in an opened mode to open the second air passage, and 
 operate in a closed mode to close the second air passage, and 
 
 a filter provided in the dust collecting container and configured to filter the foreign objects from the air received through the second air passage of the guide. 
   
     
     
         2 . The vacuum cleaner of  claim 1 , wherein:
 the filter has a cylindrical shape, and   the guide is extended in a circumferential direction of the filter.   
     
     
         3 . The vacuum cleaner of  claim 2 , wherein the guide has a length within a quarter of a circumference of the filter. 
     
     
         4 . The vacuum cleaner of  claim 1 , wherein the guide is extended in a rotation direction of the air inside the dust collecting container. 
     
     
         5 . The vacuum cleaner of  claim 1 , wherein:
 the filter comprises a flange configured to fasten the dust collecting container, and   the guide is provided adjacent to the flange.   
     
     
         6 . The vacuum cleaner of  claim 1 , wherein the guide comprises:
 a bottom portion;   a first blocking wall extending up from a corner of the bottom portion facing a bottom of the dust collecting container; and   a second blocking wall extending up from a corner of the bottom portion facing the opening of the dust collecting container.   
     
     
         7 . The vacuum cleaner of  claim 6 , wherein the first blocking wall comprises a protruding wall extended past the bottom portion. 
     
     
         8 . The vacuum cleaner of  claim 6 , wherein the shutter is provided on an end of the bottom portion of the guide. 
     
     
         9 . The vacuum cleaner of  claim 1 , wherein the shutter is obliquely extended at an angle from 10 to 70 degrees toward the dust collecting container from an outer circumference surface of the filter. 
     
     
         10 . The vacuum cleaner of  claim 1 , wherein the shutter is joined to the guide. 
     
     
         11 . The vacuum cleaner of  claim 1 , wherein the shutter is formed of an elastic plate. 
     
     
         12 . The vacuum cleaner of  claim 11 , wherein the elastic plate is made of a natural rubber, a synthetic rubber, a plastic or a metal.