US Patent 11759300 Electric toothbrush

An electric toothbrush includes a handle provided with a liquid feeding port, a toothbrush head connected to the handle and provided with a liquid discharging port communicated to the liquid feeding port through a liquid transfer passageway, a pumping mechanism disposed at the liquid transfer passageway and used for providing a pumping force for the liquid transfer passageway so as to transfer liquid from the liquid feeding port to the liquid discharging port and spray the liquid, and a transmission mechanism disposed on the handle and connected to the toothbrush head to drive the toothbrush head have a reciprocating motion relative to the handle.