Patent ID: 9084659
Filing Date: 2015-07-21
Classification: A61C,F16H,Y10T

Abstract:
1. A personal care appliance, comprising: a DC motor having an output shaft which rotates; a flexible coupling member connected to the output shaft at a proximal end thereof and having an eccentric mass mounted at a distal end thereof, wherein the flexible coupling member is capable of bending; a workpiece assembly including a workpiece at a distal end thereof; and a spring hub assembly driven by the coupling member and eccentric mass, which constrains the rotational movement of the coupling member to an oscillating action of the workpiece assembly, wherein the coupling member is elliptical in cross-section in an active region thereof, wherein the active portion is elliptical in configuration along the entire length thereof, having a thin dimension and a wider dimension with the thin dimension in the direction of the bending of the coupling member during operation of the appliance and the wider dimension perpendicular thereto.