Electric toothbrush and combination structure thereof

Abstract

An electric toothbrush includes a head unit and a handle unit detachably combined with the head unit and supplying a driving voltage to the head unit in response to a user's manipulation. The handle unit includes an insertion member including a base portion and one or more protrusion portions protruding from the base portion, and a plurality of connection terminals having a portion positioned to protrude outward from the insertion member, and electrically connected to the head unit when the head unit and the handle unit are combined. The head unit includes a receiving member including an inlet part recessed to a depth into which the insertion member is inserted, a separation preventing part protruding from an inner wall surface of the inlet part and located to overlap with the protrusion portion when the insertion member is inserted into the inlet part and then rotated at a certain angle, and a plurality of insertion parts formed to pass through a bottom surface of the inlet part; and an electrode assembly installed adjacent to the receiving member inside the head unit, and when the handle unit and the head unit are combined, passing through the plurality of insertion parts and electrically connected to ends of the plurality of connection terminals located inside the head unit.

Dependencies are inferred from the claim text.