| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush that can clean interdentium more effectively.SOLUTION: A toothbrush 1 has a long handle 11, a bristle transplanting part 12 formed on the tip of the handle 11 and a brush part 20 comprising two or more bristle bundles 21, 22 transplanted to the bristle transplanting part 12, and cleans teeth T by the brush part 20. The brush part 20 has two or more central bristle bundles 21 disposed in the longitudinal direction P of the handle 11 side by side as the bristle bundles 21, 22, and two or more side bristle bundles 22 adjacently disposed around the two or more central bristle bundles 21. The central bristle bundles 21 and the side bristle bundles 22 are slantingly formed in a mountain shape to become higher as coming close to the center. The height of the central bristle bundles 21 is higher than that of adjacent side bristle bundles 22, and an apical tilt angle θ1 of the central bristle bundles 21 and an apical tilt angle θ2 of the side bristle bundles 22 are the same.SELECTED DRAWING: Figure 2 |
