Robot cleaner

Abstract

Disclosed herein is a robot cleaner. The robot cleaner includes a body, a drive unit provided in the body to power the robot cleaner to travel, and a plurality of rotating members, each rotating about its axis of rotation by the power of the drive unit, a cleaner section being fixable to each of the rotating members to perform wet cleaning on a surface to be cleaned, wherein each of the rotating members has a predetermined angle of tilt and angle of rotation set, so as to determine a traveling direction of the robot cleaner.

1 . A robot cleaner comprising:
 a body;   a drive unit provided in the body to power the robot cleaner to travel; and   a plurality of rotating members, each rotating about its axis of rotation by the power of the drive unit, a cleaner section being fixable to each of the rotating members to perform wet cleaning on a surface to be cleaned,   wherein each of the rotating members has a predetermined angle of tilt and angle of rotation set, so as to determine a traveling direction of the robot cleaner.   
     
     
         2 . The robot cleaner according to  claim 1 , wherein the angle of tilt is an angular displacement between a vertical central axis of the robot cleaner and the tilted axis of rotation. 
     
     
         3 . The robot cleaner according to  claim 2 , wherein the angle of rotation is an angular displacement of the axis of rotation rotated on an imaginary plane perpendicular to the vertical central axis of the robot cleaner at a tilted angle of displacement thereof. 
     
     
         4 . The robot cleaner according to  claim 2 , wherein the tilted axis of rotation is formed in such a manner that the axis of rotation of the rotating member is inclined downward and outward with respect to the vertical central axis of the robot cleaner. 
     
     
         5 . The robot cleaner according to  claim 3 , wherein the rotated axis of rotation is formed in such a manner that the axis of rotation of the rotating member is rotated in a circular trajectory on the imaginary plane perpendicular to the vertical central axis of the robot cleaner at the tilted angle of displacement thereof. 
     
     
         6 . The robot cleaner according to  claim 1 , wherein the robot cleaner travels using frictional force, as a moving force source, between the surface to be cleaned and the cleaner section, the frictional force being generated while the cleaner section rotates. 
     
     
         7 . The robot cleaner according to  claim 1 , wherein at least one of directions of rotation and speeds of rotation of the plurality of rotating members is controlled. 
     
     
         8 . The robot cleaner according to  claim 7 , wherein:
 the angles of tilt and angles of rotation of the plurality of rotating members are set; and   at least one of the directions of rotation and speeds of rotation of the plurality of rotating members is varied depending on the driving condition of the robot cleaner.   
     
     
         9 . The robot cleaner according to  claim 1 , wherein the angles of tilt and angles of rotation of the plurality of rotating members are set, so that the robot cleaner travels in a straight line. 
     
     
         10 . The robot cleaner according to  claim 1 , wherein the angles of tilt and angles of rotation of the plurality of rotating members are set, so that the robot cleaner travels along a trajectory comprising a curve having a predetermined radius of curvature. 
     
     
         11 . The robot cleaner according to  claim 1 , wherein the cleaner section has an independent angle of tilt and angle of rotation set. 
     
     
         12 . The robot cleaner according to  claim 1 , wherein the plurality of rotating members comprise a first rotating member, a second rotating member, and a third rotating member.