Suction nozzle assembly for a vacuum cleaner

Abstract

A suction nozzle assembly for a vacuum cleaner includes a nozzle body with a contaminants suction opening, and a rotation drum rotatably disposed at the contaminants suction opening of the nozzle body with a plurality of protrusions formed on an outer circumferential surface of the rotation drum. When the nozzle body moves on a surface to be cleaned, the rotation drum is rotated by friction force of the plurality of protrusions against the surface to be cleaned.

1 . A suction nozzle assembly for a vacuum cleaner, comprising:
 a nozzle body with a contaminants suction opening; and   a rotation drum rotatably disposed at the contaminants suction opening, the rotation drum having a plurality of protrusions formed on an outer circumferential surface,   wherein, when the nozzle body moves on a surface to be cleaned, the rotation drum is rotated by friction force of the plurality of protrusions against the surface to be cleaned.   
   
   
       2 . The suction nozzle assembly of  claim 1 , further comprising:
 a rotation restricting member to restrict rotation of the rotation drum.   
   
   
       3 . The suction nozzle assembly of  claim 2 , wherein the rotation restricting member allows the rotation drum to rotate only in one direction. 
   
   
       4 . The suction nozzle assembly of  claim 3 , wherein the rotation restricting member comprises:
 a ratchet wheel disposed integrally with the rotation drum; and   a ratchet pawl disposed at the nozzle body to allow the ratchet wheel to rotate only in one direction.   
   
   
       5 . The suction nozzle assembly of  claim 4 , wherein the rotation restricting member allows the rotation drum to rotate when pushing the nozzle body forward. 
   
   
       6 . The suction nozzle assembly of  claim 2 , wherein the rotation restricting member allows the rotation drum to rotate in clockwise and counterclockwise directions within a predetermined angle. 
   
   
       7 . The suction nozzle assembly of  claim 1 , wherein the rotation drum comprises:
 a drum body; and   a removing member disposed at the drum body, the removing member having the plurality of protrusions.   
   
   
       8 . The suction nozzle assembly of  claim 7 , wherein the plurality of protrusions comprise a shape selected from the group consisting of a substantially stick shape, a substantially block shape, a substantially loop shape, and any combinations thereof. 
   
   
       9 . The suction nozzle assembly of  claim 1 , further comprises:
 a brush rotatably disposed at one side of the rotation drum in the nozzle body.   
   
   
       10 . A suction nozzle assembly for a vacuum cleaner, comprising:
 a nozzle body with a contaminants suction opening; and   a pair of rotation drums rotatably disposed at the contaminants suction opening of the nozzle body, each rotation drum of the pair of rotation drums having a plurality of protrusions formed on an outer circumferential surface,   wherein, when the nozzle body moves on a surface to be cleaned, the pair of rotation drums are rotated by friction force of the plurality of protrusions against the surface to be cleaned.   
   
   
       11 . The suction nozzle assembly of  claim 10 , further comprising:
 a rotation restricting member to restrict each of the pair of rotation drums to rotate.   
   
   
       12 . The suction nozzle assembly of  claim 11 , wherein the rotation restricting member is configured so that, when the nozzle body moves in one direction, a first rotation drum of the pair of rotation drums rotates and a second rotation drum does not rotate, and when the nozzle body moves in a reverse direction, the first rotation drum does not rotate and the second rotation drum rotates. 
   
   
       13 . The suction nozzle assembly of  claim 12 , wherein the rotation restricting member comprises:
 a ratchet wheel disposed integrally with each of the pair of rotation drums; and   a ratchet pawl disposed at the nozzle body to restrict rotation of the ratchet wheel.   
   
   
       14 . The suction nozzle assembly of  claim 10 , wherein each of the pair of rotation drums comprises;
 a drum body; and   a removing member disposed at the drum body, the removing member having the plurality of protrusions.   
   
   
       15 . The suction nozzle assembly of  claim 14 , wherein the plurality of protrusions comprise a shape selected from the group consisting of a substantially stick shape, a substantially block shape, a substantially loop shape, and any combinations thereof.