| 摘要 |
<p>A toothbrush including a handle, a head and a moving mechanism, where the head includes a head base; and at least two bristles sets: two outer bristles sets and a middle bristles set located therebetween. The moving mechanism connects to the two outer bristles sets for rotating thereof in respect to a main axis of the toothbrush for shifting the bristle sets between at least two positions: an open position, in which the outer bristles sets are angularly shifted away from the main axis; and a closed position, in which the outer bristles sets not angularly shifted away from the main axis, wherein in the closed position the bristles of all bristles sets are more dense than in the other positions providing a substantially harder toothbrush thereby allowing a user to change hardness level of the toothbrush by changing the position of the outer bristles sets.</p> |
