To provide a toothbrush configured so that a bristle tuft is less likely to come out of implanting holes, the toothbrush can be easily operated in the oral cavity, and having sufficient strength.
The tooth brush includes a substantially flat plate-like head section 10 having an implanting surface 10a in which a plurality of implanting holes 11 are provided. bristle tufts are each folded into two, and a flat wire inserted between the two folded portion of the bristle tuft is driven into each of the implanting holes 11 to implant the bristle tuft into the implanting hole 11. The head section 10 has a thickness in the range of 2.0-4.0 mm, and the minimum distance W between outermost implanting holes 11a in the widthwise direction of the head section and a corresponding edge 12 of the head section 10 is in the range of 0.4-0.9 mm. It is desirable that the head section 10 is constituted of a polybutylene terephthalate resin.
HACHISUGA YOSHIHIRO
KOBAYASHI KAIJI
| JPS63128826U | 1988-08-23 | |||
| JPH07143914A | 1995-06-06 | |||
| JPS60215306A | 1985-10-28 |
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama