Patent ID: 7549190

Claim:
A nozzle assembly of a vacuum cleaner, comprising: a nozzle assembly body having an air inlet and an air outlet; a drum brush unit disposed in the nozzle assembly body in the vicinity of the air inlet, and said drum brush unit having a drum brush disposed to brush away dirt or dust adhered to a surface to be cleaned while coming in rotation contact therewith; and a movable brush unit disposed in at least one of a front and a rear of the air inlet on an undersurface of the nozzle assembly body to pivot in an opposite direction to a moving direction of the nozzle assembly body thus to change a contacting angle to the surface to be cleaned in a range of a predetermined angle and then to brush away the dirt or dust adhered to the surface to be cleaned, in moving of the nozzle assembly body, wherein the movable brush unit comprises a first movable brush member disposed in front of the air inlet and a second movable brush member disposed in the rear of the air inlet.