Patent attributes
A vacuum cleaner includes a charging unit including first and second light emitting parts arranged in positions separated from each other. The light emitting parts transmit respective guide signals to guide a vacuum cleaner body. The charging unit includes a charging unit controller to make the light emitting parts transmit the respective guide signals that are same guide signals and transmitted according to respective timings. The vacuum cleaner body includes a third light emitting part to transmit a demand signal. The vacuum cleaner body includes a light receiving part capable of receiving the respective guide signals transmitted from the first and second light emitting parts. A controller makes the body case travel toward the charging unit depending on respective receiving statuses at the light receiving part of the two guide signals transmitted from the first and second light emitting parts and according to the respective timings.
