DRIVE MECHANISM FOR POWER DEVICE

A drive mechanism for electric toothbrush includes a grip housing and a pivot housing mounted within the grip housing. The pivot housing has a fixed portion, a movable portion with a free end spaced from the fixed portion, and bridge that connects the fixed and movable portions and defines a fulcrum. A motor is mounted within the pivot housing, and an eccentric weight extends from the motor with the motor operable to rotate the eccentric weight. A brush shaft is attached to the pivot housing opposite the free end. A power source is adapted to activate the motor and rotate the eccentric weight, such that the free end of the pivot housing is driven to move by the movement of the eccentric weight, the pivot housing pivots at the fulcrum, and the brush end of the brush shaft oscillates about the fulcrum.