APPARATUS FOR CONVERTING SIDE-TO-SIDE DRIVING MOTION TO ROTATIONAL MOTION WITH A SPRING ASSEMBLY AND SYSTEM FOR TUNING THE SPRING ASSEMBLY

摘要

A method for tuning resonant spring assembly systems used in appliances such as power toothbrushes, particularly leaf spring systems, includes the step of measuring the frequency-dependent amplitude of the appliance workpiece, and then removing a portion of the spring member so as to decrease its spring rate sufficiently that the resonant frequency of the spring member closely approximates the drive frequency of the appliance.