Abstract: The present disclosure provides a handle housing of an electric toothbrush, an electric toothbrush and a molding process of the handle housing, the electric toothbrush comprising: a light-emitting element disposed in the handle housing, the handle housing including: a machine casing, a display casing and at least one button, an accommodating cavity for accommodating the light-emitting element is formed in the machine casing, and an installation groove communicated to the accommodating cavity is formed on the outer surface of the machine casing, the display casing is located in the installation groove, the display casing has a display area for transmitting lights emitted by the light-emitting element, and the at least one button is connected to the display casing.

Abstract: The present disclosure provides a nozzle for oral irrigator, comprising a spray head, the spray head comprising: a spray head main body, defining a first flow channel extending in an axial direction therein, one end of the first flow channel is formed as a water inlet, and the other end is formed as a water outlet; and a stopping structure, comprising two limiting portions and two locating portions, the first direction and the second direction are perpendicular to each other, and the two limiting portions respectively extend from the spray head main body in directions away from each other, such that a first free end of the two abutting members extending from the spray head main body is farther away from the axial direction of the spray head main body than a second free end of the two locating portions extending from the spray head main body.