Cleaning device

Abstract

A cleaning device capturing dust on a cleaning target surface by static electricity includes: a frame body; a rotating brush rotatably supported on the frame body and provided with a brush part; a driver that rotates the rotating brush; an opening that exposes a portion of the brush part to outside of the frame body; and a rubbing member that gives a negative charge to the brush part by rubbing the brush part as the rotating brush rotates. A material that forms the rubbing member is on a further toward positive end of a triboelectric series than a material that forms the brush part.

What is claimed is: 
     
         1 . A cleaning device capturing dust on a cleaning target surface by static electricity, the cleaning device comprising:
 a frame body;   a rotating brush rotatably supported on the frame body and provided with a brush part;   a driver that rotates the rotating brush;   an opening that exposes a portion of the brush part to outside of the frame body; and   a rubbing member that gives a negative charge to the brush part by rubbing the brush part as the rotating brush rotates, wherein   a material that forms the rubbing member is on a further toward positive end of a triboelectric series than a material that forms the brush part.   
     
     
         2 . The cleaning device according to  claim 1 , wherein
 the material that forms the rubbing member has a smaller work function than the material that forms the brush part.   
     
     
         3 . The cleaning device according to  claim 1 , wherein,
 in a rotating direction of the rotating brush, the rubbing member is positioned upstream of the opening and is positioned downstream of another member in contact with the rotating brush.   
     
     
         4 . The cleaning device according to  claim 1 , wherein
 the portion of the brush part exposed through the opening is configured to rub the cleaning target surface as the cleaning device moves on the cleaning target surface.   
     
     
         5 . The cleaning device according to  claim 1 , wherein
 the rotating brush includes a shaft part rotatably supported on the frame body, and   the brush part is attached to the shaft part and is configured to rotate integrally with the shaft part.   
     
     
         6 . The cleaning device according to  claim 1 , wherein
 the rotating brush includes a rotatably stretched endless belt, and   the brush part is attached to the belt and is configured to rotate integrally with the belt.   
     
     
         7 . The cleaning device according to  claim 1 , wherein
 the brush part of the rotating brush is a first brush part, and   the rubbing member includes a second brush part making contact with the first brush part.   
     
     
         8 . The cleaning device according to  claim 1 , wherein
 the rubbing member is a rotating member rotatably supported on the frame body.   
     
     
         9 . The cleaning device according to  claim 1 , wherein
 the rubbing member is a part of the frame body.   
     
     
         10 . The cleaning device according to  claim 1 , wherein
 the driver is a motor.   
     
     
         11 . The cleaning device according to  claim 1 , further comprising
 a wheel provided to the frame body, the wheel supporting the cleaning device so as to be movable on the cleaning target surface during use of the cleaning device, wherein   the driver includes a transmission member that transmits rotation of the wheel to the rotating brush, and the rotating brush is configured to rotate as the transmission member transmit rotation of the wheel to the rotating brush.   
     
     
         12 . The cleaning device according to  claim 1 , further comprising:
 a removal member that makes contact with the brush part downstream of the opening and upstream of the rubbing member in a rotating direction of the rotating brush and scrapes off dust adhered to the brush part; and   a container that holds dust scraped from the brush part by the removal member.   
     
     
         13 . The cleaning device according to  claim 1 , further comprising
 a collection member that collects dust adhered to the brush part, the collection member making contact with the brush part downstream of the opening and upstream of the rubbing member in a rotating direction of the rotating brush, wherein   a material that forms the collection member is on a further toward negative end of the triboelectric series than the material that forms the brush part.   
     
     
         14 . The cleaning device according to  claim 13 , wherein
 the material that forms the collection member has a larger work function than the material that forms the brush part.   
     
     
         15 . The cleaning device according to  claim 13 , wherein
 the collection member is a rotating member rotatably supported on the frame body, and   the cleaning device includes:   a removal member that makes contact with a surface of the collection member and scrapes off dust adhered to a surface of the collection member; and   a container that holds dust scraped from the collection member by the removal member.   
     
     
         16 . The cleaning device according to  claim 1 , wherein
 the cleaning device is a head part of a vacuum cleaner.