Patent ID: 8032964

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; and 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 a plurality of rows generally transverse to the longitudinal axis, wherein the second plurality of cleaning bristles are all supported within 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 plurality of cleaning bristles includes a back and forth oscillating movement of the second plurality of cleaning bristles about the longitudinal axis and relative to the first plurality of cleaning bristles, and wherein the back and forth oscillating movement of the second plurality of cleaning bristles is caused by the oscillating movement of the drive shaft.