Patent ID: 8370984

Claim:
A cleaning section for an electrical toothbrush with a handle section, having a motor and a drive shaft, the cleaning section comprising: a single movable bristle holder structured to receive a drive motion from the motor via a drive mechanism comprising a drive shaft having a longitudinal axis, the drive shaft being structured to oscillate around its longitudinal axis thereby imparting rotation or oscillation to the single movable bristle holder; a head including a first plurality of cleaning bristles arranged in a static bristle field which in use is static relative to the handle section and a second plurality of cleaning bristles arranged in rows generally tranverse to the longitudinal axis wherein the second plurality of cleaning bristles are supported within the single movable bristle holder to have at least one freedom of motion relative to the first plurality of cleaning bristles; and an end extension portion including a third plurality of cleaning bristles, the end extension portion being coupled to the single movable bristle holder to have at least one freedom of motion relative to the first plurality of cleaning bristles; wherein the single movable bristle holder is movable with respect to the head and the static bristle field such that a cleaning motion of the second and third plurality of cleaning bristles includes a back and forth oscillating movement of the second and third plurality of cleaning bristles relative to the first plurality of cleaning bristles, and wherein the back and forth oscillating movement of the second and third plurality of cleaning bristles is caused by the oscillating movement of the drive shaft.