Suction nozzle for use in vacuum cleaner

Abstract

A suction nozzle for use in a vacuum cleaner, which can clean a surface to be cleaned having a corner portion where a horizontal surface and a vertical surface meet, such as a staircase, is disclosed. The suction nozzle includes a nozzle body having an air inlet formed in a bottom surface thereof to draw in air, and a brush unit having a liftable brush liftably and lowerably disposed in the nozzle body in front of the air inlet and coming in surface contact with a surface to be cleaned to brush away dirt or dust therefrom.

1 . A suction nozzle for use in a vacuum cleaner, comprising:
 a nozzle body having an air inlet formed in a bottom surface thereof to draw in air; and   a brush unit having a liftable brush liftably and lowerably disposed in the nozzle body in front of the air inlet and coming in surface contact with a surface to be cleaned to brush away dirt or dust therefrom.   
   
   
       2 . The suction nozzle as claimed in  claim 1 , wherein the air inlet is formed, so that when the nozzle body is in a horizontal surface-cleaning position, a front part thereof is located higher than a rear part thereof from the surface to be cleaned. 
   
   
       3 . The suction nozzle as claimed in  claim 1 , wherein the liftable brush comprises:
 a brush body having a brush attached on a lower part thereof;   a guide member to accommodate the brush body and to guide a lifting and lowering movement of the brush body; and   an elastic member to elastically urge the brush body in a direction where the brush comes in surface contact with the surface to be cleaned.   
   
   
       4 . The suction nozzle as claimed in  claim 1 , wherein the brush unit further comprises a fixed brush fixedly disposed on the nozzle body in the rear of the air inlet and coming in surface contact with the surface to be cleaned to bush away dust or dirt therefrom. 
   
   
       5 . The suction nozzle as claimed in  claim 4 , wherein the fixed brush comprises a rubber blade. 
   
   
       6 . The suction nozzle as claimed in  claim 5 , wherein the rubber blade has a plurality of protrusions formed on a front surface thereof. 
   
   
       7 . The suction nozzle as claimed in  claim 4 , further comprising a roller unit having at least one roller rotatably disposed on the nozzle body to come in rolling contact with the surface to be cleaned. 
   
   
       8 . The suction nozzle as claimed in  claim 7 , wherein the at least one roller is disposed, so that a center thereof is higher than fixing centers of the liftable brush and the fixed brush. 
   
   
       9 . A suction nozzle for use in a vacuum cleaner, comprising:
 a nozzle body having an air inlet formed in a bottom surface thereof to draw in air;   a liftable brush having a brush and an elastic member, the elastic member elastically urging the brush in a direction where the brush comes in surface contact with a surface to be cleaned, the liftable brush being disposed in the nozzle body in front of the air inlet;   a fixed brush fixedly disposed on the nozzle body in the rear of the air inlet and coming in surface contact with the surface to be cleaned to bush away dust or dirt therefrom.   
   
   
       10 . The suction nozzle as claimed in  claim 9 , wherein the air inlet is formed, so that when the nozzle body is in a horizontal surface-cleaning position, a front part thereof is located higher than a rear part thereof from the surface to be cleaned. 
   
   
       11 . The suction nozzle as claimed in  claim 9 , wherein the liftable brush further comprises:
 a brush body having the brush attached on a lower part thereof; and   a guide member to accommodate the brush body and to guide a lifting and lowering movement of the brush body.   
   
   
       12 . The suction nozzle as claimed in  claim 9 , wherein the fixed brush comprises a rubber blade. 
   
   
       13 . The suction nozzle as claimed in  claim 12 , wherein the rubber blade has a plurality of protrusions formed on a front surface thereof. 
   
   
       14 . The suction nozzle as claimed in  claim 9 , further comprising a roller unit having at least one roller rotatably disposed on the nozzle body to come in rolling contact with the surface to be cleaned. 
   
   
       15 . The suction nozzle as claimed in  claim 14 , wherein the at least one roller is disposed, so that a center thereof is higher than fixing centers of the liftable brush and the fixed brush. 
   
   
       16 . The suction nozzle as claimed in  claim 15 , wherein the at least one roller is disposed, so that a center thereof is closer to a fixing center of the liftable brush than to the fixing center of the fixed brush. 
   
   
       17 . The suction nozzle as claimed in  claim 14 , wherein the at least one roller is disposed, so that a center thereof is closer to a fixing center of the liftable brush than to the fixing center of the fixed brush.