Patent ID: 8434190

Claim:
A toothbrush having a handle portion and a neck portion connecting the handle portion with a head, said head having a brushing side and a rear side opposite thereto, said brushing side including a plurality of bristle tufts for cleaning the teeth, said tufts being attachable in the head through tufting apertures using an anchor, with each tufting aperture being assigned a blind-end hole having sidewalls and a bottom, wherein provision is made for a chamfer or radius in the transition area between the bottom and the sidewalls, with a cross-sectional area of the head between a first bottom and the rear side differing from a cross-sectional area of the head between a second bottom and the rear side, and said first bottom and said second bottom being arranged in the head in such a way that the minimum distance y between the first bottom and the rear side as well as the minimum distance x between the second bottom and the rear side are each in the range of between about 0.5 and about 2.5 mm.