An electrically driven toothbrush has a rotatable shaft with a cam preferably
at a remote end of the shaft, which fits into a slot in a bristle holder. The holder
is mounted for rotation in a toothbrush head. When the shaft rotates cam describes
a circle and drivingly engages the slot to cause the holder to vibrate in a first
brushing motion. A second bristle holder is also driven by the shaft, for a second
kind of brushing motion. The second bristle holder is driven through and engagement
with a portion of the remote end and/or with one or more additional cams or cam
portions included on the shaft.
