US Patent 10149969 Skin treatment appliance with changeable workpiece

The appliance includes an appliance body/handle and an interface assembly for receiving a detachable workpiece. The body/handle includes a signal-generating assembly with electrical connections to the appliance body interface. The signal-generating assembly is controlled by a microprocessor, which generates signals adapted to control and operate the workpiece which is attached to the appliance. A plurality of workpieces are included which are individually adapted for treating various spot skin irregularities. The appliance further includes a system for identifying the workpiece attached, so that appropriate operating signals can be generated and provided to the attached workpiece.