Patent ID: 8825256

Claim:
A charging device of a robot cleaner, the charging device comprising: a main body comprising a terminal unit configured to charge the robot cleaner, the main body defining an appearance; an induction signal generating unit disposed at a side of the main body to transmit a return induction signal to the robot cleaner; and an induction signal guide member disposed at a side of the induction signal generating unit to enhance docking performance of the robot cleaner by improving linearity of the return induction signal by limiting a transmission angle of the return induction signal transmitted by the induction signal generating unit, wherein the induction signal generating unit comprises at least one docking induction light emitting unit to guide the robot cleaner to a docking position by transmitting a docking induction signal, wherein the induction signal guide member comprises a guide which is opened at a front side and surrounds at least both sides of the at least one docking induction light emitting unit, and first and second reflections units are extended from the guide to block the docking induction signal and spaced apart from each other, and wherein an extended direction of the first and second reflection units crosses a direction of transmitting the docking induction signal.