| 摘要 |
<p>The invention is directed generally to an electric toothbrush and particularly to a brush head for such an electric toothbrush. The brush head comprises bristle support including mounting means for the movable mounting of the bristle support, said bristle support carrying several outer bristle tufts and several inner bristle tufts, said outer bristle tufts having a greater height than said inner bristle tufts, such that in the working surface defined by the free ends of the inner and outer bristle tufts there is formed a central depression which has a groove-shaped concave bottom continuously curved in one direction and extending substantially straight in the direction vertical thereto. According to the invention, a step-shaped jump in height is provided between the central depression and said outer bristle tufts with the greater height.</p> |
