Patent ID: 6920660

Claim:
An electric toothbrush comprising: a handle, a bristle head, a neck extending from the handle to the bristle head, a drive shaft extending through the neck to the bristle head, a motor situated within the handle and having a pair of spaced apart recesses and an output shaft situated between the recesses, a reduction gearbox receiving torque from the output shaft of the motor and transmitting it to the drive shaft at a reduced speed, the gearbox comprising a base plate having a pair of projections extending into the recesses of the motor, the base plate also having extending therefrom a pin upon which a first driven gear is rotatably mounted, a cover plate fixed to the base plate and at least one gear set between the base plate and the cover plate and transmitting torque from the motor to the drive shaft, wherein the cover plate has a pair of bridges by which the cover plate is fixed to the base plate.