Title:
TOOTHBRUSH
Document Type and Number:
Japanese Patent JP2022008394
Kind Code:
A
Abstract:
To provide a toothbrush in which base cracking and poor appearance are suppressed and a head part can be thinner while the anti-coming-off strength of bristle bundles are maintained.SOLUTION: A toothbrush 1 has an implant base 5 having implant holes 20 in a head part 2, and bristle bundles are implanted into the implant holes 20 of the implant base using implanting wires 3, the head part 2 being formed of a polyacetal resin having a number average molecular weight of 50,000 or more, the toothbrush employing a thin head with a thickness T1 of 3.0 mm or less, and a depth U1 of each implant hole being 1.9 mm or more.SELECTED DRAWING: Figure 4
Inventors:
IMAI KIEKO
Application Number:
JP2021149505A
Publication Date:
January 13, 2022
Filing Date:
September 14, 2021
Export Citation:
Assignee:
SUNSTAR INC
International Classes:
A46B5/00; A46B3/04; A46B9/04
Domestic Patent References:
| JP2021016496A | 2021-02-15 | |||
| JP5427486B2 | 2014-02-26 |
Attorney, Agent or Firm:
Takao Yanagino
Yoshihide Yanagino
Norio Morioka
Sekiguchi Hisayu
Masato Nakagawa
Yoshihide Yanagino
Norio Morioka
Sekiguchi Hisayu
Masato Nakagawa