Patent ID: 7673367

Claim:
A cleaning robot, comprising: a main body to travel on a floor to be cleaned; a dust collecting unit installed in the main body; and a corner cleaning unit installed in the main body, and comprising a suction member having a suction arm unfolded from the main body by means of rotation, and a rotatable cylinder connected to the suction arm; a movable member rotatably coupled around the rotatable cylinder of the suction member by a torsion spring such that the movable member moves upwards and downwards together with the suction member; a driving unit to rotate the movable member; supporting brackets provided in the main body to support the driving unit; at least one elevation guide face formed at one of the supporting brackets to allow the movable member to move upwards and downwards along the elevation guide face as the movable member rotates; and at least one guide knob provided to the movable member in such a manner that the guide knob moves upwards and downwards along the elevation guide face, wherein the guide knobs are provided with rollers, respectively, in such a manner that the rollers to roll along the elevation guide faces and the rotation guide faces.