VIBRATION COMPENSATION SYSTEM FOR POWER TOOTHBRUSHES

摘要

A power toothbrush having a vibration compensation system, the toothbrush including a toothbrush housing(72), and an actuator which includes a stator(74)having a first moment of inertia and a rotor (76) having a second moment of inertia, at the end of said rotor is mounted a bristle member. A first spring element (86) having a first spring constant connects the stator to the housing, while a second spring element(88) having a second spring constant connects the rotor to the housing, wherein the ratio of the first and second spring constants is substantially the same as the ratio of the first and second moments of inertia.