| 摘要 |
The motorless rotary toothbrush is made of an elongated grip (10) which bears at one end a freely rotating disk (12) on an axis substantially perpendicular to the longitudinal axis (16) of the distal end of the grip. The disk (12) bears the bristles (20) of the brush. The bristles (20) are implanted symmetrically vis-à-vis the rotary axis (14) of the disk (12). The stem of each bristle of at least one outer ring (18) of the disk (12) forms a certain angle (a) with the radial plane going through the stem of the bristle (20). |
