Patent ID: 8522797

Claim:
A head for a sonic toothbrush comprising: an exterior wall having a top end, a bottom end, a front face and a rear face; a bore defined by an interior wall of the head, said bore originating in a bottom face of the head and extending inwardly toward the top end thereof; and wherein the bore is adapted to receive a bayonet mount extending from a handle of the sonic toothbrush; and wherein the bottom end of the exterior wall is adapted to be releasably locked to the handle; a recess defined in an interior surface of the interior wall of the head; a dental accessory assembly detachably engageable with the exterior wall of the head; an aperture defined in the dental accessory assembly; and a locking assembly disposed within the bore, wherein a locking pin extends outwardly from the locking assembly, through the aperture in the dental accessory assembly and into the recess in the interior surface of the interior wall of the head when the aperture and recess are aligned, and wherein the locking pin is selectively received within the aperture and recess to selectively lock the dental accessory assembly to the exterior wall of the head; the locking assembly is movable between a locked position where the locking pin engages in the aperture in the dental accessory assembly; and an unlocked position where the locking pin is disengaged from the aperture in the dental accessory assembly, and wherein the locking assembly is in the locked position only when the head is locked to the handle; the locking assembly further includes a mechanism for locking the locking assembly against longitudinal movement within the bore, and the mechanism is movable between a locked and an unlocked position, and when the mechanism is in the unlocked position, the locking assembly is movable in the bore, and when the mechanism is in the locked position, the locking assembly is fixed in position within the bore.