| 摘要 |
PROBLEM TO BE SOLVED: To provide a toothbrush improving operability inside the oral cavity more than that of a conventional toothbrush and sufficiently having a bristle retaining strength and head folding endurance.SOLUTION: The toothbrush 1 includes the head 3 provided with a plurality of implanting holes on an implanting face 3b and is manufactured by the following manner: the bundle of the bristles 5 is twice-folded; and a wire sandwiched between them is punched into the holes, while filling the holes with the bundles. The head 3 is made of a polyacetal resin or a polybutylene terephthalate resin. The thickness (t) of the head 3 is at least 2 mm and less than 3 mm. |
