Electric toothbrush with a replaceable head section

摘要

A toothbrush comprises: a handle containing an electric drive motor and having an engagement socket for a head section; a replaceable head section being an elongate structure having a drivable toothbrush head at one end and having a plug part which is engageable with the socket at its opposite end and the plug part having an end surface which when the plug part is engaged with the socket faces generally in the direction of the handle, and the socket having an end surface which faces generally in the direction of the head. The end surface of the plug part is resiliently deformable in the handle-head direction under the influence of pressure applied longitudinally to the end surface. One of either the end surface of the plug part or the end surface of the socket has a convexity thereon projecting along the head-handle direction, and the other has a concavity therein which receives the projection when the plug part is engaged with the socket.