Electric toothbrush and motor thereof

Abstract

An electric toothbrush and a motor thereof are provided. The motor includes a motor housing, a stator assembly fixedly disposed in the motor housing, and a rotor assembly. The stator assembly comprises a stator core. The rotor assembly is disposed in a mounting cavity of the stator assembly. The rotor assembly includes a rotor core, permanent magnets and protruding portions. The permanent magnets are disposed at intervals in a circumferential direction of the rotor core. At least one group of protruding portions is disposed between corresponding two adjacent permanent magnets. The at least one group of protruding portions extends from a surface of the rotor core. A distance between an end surface of each of the protruding portions and the central axis of the rotor core is greater than a distance between an outer surface of each of the permanent magnets and the central axis of the rotor core.

Dependencies are inferred from the claim text.