A brush head for an oral care implement includes at least one (first) group of tufts extending from a mounting surface of a tuft carrier having a rotation axis. The tufts have a base end and a free end. The tufts of the first group are tufts having an extension in a circumferential direction about the rotation axis exceeding an extension in a radial direction. The tufts of the first group may be inclined with respect to the mounting surface in at least one direction. Each of the first-group tufts may comprise a first group of filaments and a second group of filaments, wherein the second-group filaments' free ends protrude beyond the first-group filaments' free ends.

A filament for an oral care implement has a longitudinal axis and a substantially cross-shaped cross-sectional area extending in a plane substantially perpendicular to the longitudinal axis. The cross-shaped cross-sectional area has four projections and four channels. The projections and channels are arranged in an alternating manner. Each channel has a concave curvature formed by neighboring and converging projections. The concave curvature has a radius, and each projection is end-rounded thereby forming a curvature. The curvature has a diameter, and the ratio of the diameter of the curvature of the projection to the radius of the curvature of the channel is from about 0.2 to about 1.5.

A manually-wound or charged, powered toothbrush includes a winding mechanism, an energy storage element, and an output gear train to cause a rotating, oscillating or sweeping brush head to move, thus improving the efficacy of the user's oral-care regimen.

An oral care device attachment for being coupled to a drive shaft of an oral care device handle, the attachment including: an outer attachment tube having a coupling end that is intended for being secured at the oral care device handle; a carrier mounted for driven motion at the outer attachment tube; a motion transmitter disposed inside of the outer attachment tube; where a spring is arranged that the motion transmitter is biased into a position towards the coupling end of the outer attachment tube.

The present invention is concerned with an electric utility brush having a flexible drive shaft, and in particular an electric toothbrush having a substantially spherical head mounted on the flexible drive shaft and which can be driven rotationally in at least two different orientations in order to provide comprehensive brushing capabilities.

The invention relates to a brush head for an electric toothbrush comprising a brush head shaft (20) with two ends, one end (21) with a tuft plate (30) being oscillatable about its centre axis, and one end adapted for detachable connection to a handle of the electric toothbrush, wherein the oscillatable tuft plate comprises at least three tufts (40), each tuft being non-rotatably attached to the tuft plate, wherein each tuft comprises a free end (41) and an end (42) fixedly attached to the oscillatable tuft plate.

A removable toothbrush head for an electric toothbrush includes a bristle carrier and an elongated neck. One end portion of the elongated neck includes an opening for connection to an electric toothbrush handle, and another end portion comprises a neck hub configured to rotatably support the bristle carrier. Also included is a driven brush shaft disposed longitudinally within the elongated neck. The brush shaft is configured to interact with the bristle carrier at a distal end portion of the brush shaft, which includes a pivot extension extending therefrom and spaced apart from the longitudinal axis of the brush shaft, as well as a bristle carrier interface positioned at least partially along the longitudinal axis of the brush shaft and configured to cause partial rotational motion of the bristle carrier when the brush shaft is driven by an electric toothbrush handle.

A brush head for performing reciprocating rotation comprises a driving wheel and a housing on which a top hole and/or a central through hole are/is distributed in a centering manner. The center line(s) of the holes and a rotation axis (L1) of a driving shaft are located at a same line, and the driving shaft penetrates through the central through hole. The fitted region of the driving shaft and the driving wheel enters the through holes distributed on the driving wheel to link the driving shaft and the driving wheel fixedly. A driven part matching a driving part is distributed on a protrusion of the brush disc on which a hollow region is formed. The driving shaft penetrates through or enters the hollow region and limits the brush disc to move. The brush disc is incapable of performing reciprocating rotation when the driving shaft is not installed or is damaged.

A coupling mechanism for an electric toothbrush includes a handle coupling portion and a refill coupling portion structured and configured to engage one another, thereby providing a secure connection between the handle and the refill. The handle coupling portion has a coupling stem disposed at one end of the handle and a coupling pin protruding from the stem. The coupling stem has outer walls terminating at a free end thereof. The refill coupling portion has a tubular structure having refill walls and an interior space for receiving therein the coupling stem, and a pair of mutually opposite and resiliently deformable cantilevered arms disposed in the interior space, each of the arms terminating with a coupling surface for engaging the coupling pin of the handle coupling portion.

A refill for an electric toothbrush comprises a generally tubular structure formed by refill walls defining an interior space for accepting thereinto a coupling stem of a toothbrush handle. The refill includes a motion transmitter functionally connected to the brush head for driving it. The refill has a coupling device including a pair of mutually opposite and resiliently deformable cantilevered arms disposed in the interior space of the refill and adjacent to the refill walls. Each of the arms terminates with a coupling surface for engaging a coupling pin extending from the handle's coupling stem for secure and disengageable connection therewith.