Patent ID: 7765629

Claim:
A toothbrush head for an electric toothbrush, the toothbrush head comprising a brush head carrier that is releasably connectable to a hand piece of an electric toothbrush, the brush head carrier comprising: a brush head carrier housing having a free end configured to be releasably connected to an electric toothbrush hand piece; a translator element rotatable about a longitudinal rotation axis within the brush head carrier housing; a plurality of bristle supports that each carry a respective bristle set and are movably mounted on the brush head carrier housing; and a plurality of drive couplers, each drive coupler being coupled to a respective bristle support and eccentrically coupled to the translator element by an eccentric driver, such that each of the bristle supports is oscillated in response to rotation of the translator element, at least one of the bristle supports coupled so as to rotate in oscillation about an axis of rotation extending transverse to the longitudinal rotation axis of the translator element; wherein the plurality of bristle supports includes a main bristle support rotatable about an axis of rotation essentially perpendicular to the longitudinal rotation axis of the translator element; and an auxiliary bristle support pivoted about a pivot axis essentially perpendicular to the longitudinal rotation axis of the translator element and disposed near an edge of the auxiliary bristle support nearest the main bristle support, such that an end of the auxiliary bristle support remote from the main bristle support oscillates laterally as the auxiliary bristle support pivots about the pivot axis; and wherein the pivot axis is arranged approximately parallel to a main bristle direction of bristles of the auxiliary bristle support.