Personal care device actuator with rattle mitigation

An actuator for an electric toothbrush, comprising:

• a housing having an inner surface and a principal axis extending longitudinally through the center of the housing, and having a sequence of more than one magnet, disposed along the inner surface of the housing;
• and
• an eccentric core, comprising:
• a spindle of magnetizable material extending along a secondary axis, and
• a first pole assembly, arranged in a radial configuration about the spindle, and comprising a first set of pole members comprising at least one pole member extending radially at least a first average distance from the spindle, and a second set of pole members comprising at least one pole member extending radially a second average distance from the spindle, wherein the length of the first average distance is greater than the length of the second average distance such that the spindle is subjected to a bias force in a bias direction, radially from the principal axis, whereby the secondary axis is offset from the principal axis.