Title:
歯ブラシ
Document Type and Number:
Japanese Patent JP6905867
Kind Code:
B2
Abstract:
To provide a toothbrush capable of avoiding a gap and a crack generated in a peripheral edge portion of secondary resin filled in a hollow part of a toothbrush body formed by two-color molding.SOLUTION: A toothbrush 10 has a toothbrush body 15 including a planting base 14 and a handle part 13. In the handle part 13, secondary resin 22 whose material is different from that of primary resin 21 for forming the toothbrush body 15 is filled in a hollow part 20 provided penetrating the surface and the rear surface, during two-color molding, and is provided by being exposed on the surface side surface and the rear side surface of the handle part 13. The secondary resin 22 goes over an apex 20b of an opening peripheral edge part 20a and is provided by covering part of the surface of the toothbrush body 15 by the primary resin 21. At the opening peripheral edge part 20a of the hollow part 20, step parts 20c protruding in a step-like manner toward the inside of the hollow part 20 and connection surface parts 20d for connecting the step parts 20c are provided on the further inside region than the apex 20b. The connection surface parts 20d are provided in an inclined manner.SELECTED DRAWING: Figure 7
Inventors:
Akira Suzuki
Hideki Miura
Hideki Miura
Application Number:
JP2017105008A
Publication Date:
July 21, 2021
Filing Date:
May 26, 2017
Export Citation:
Assignee:
Kao Corporation
International Classes:
A46B5/00
Domestic Patent References:
| JP2003039481A | ||||
| JP60181169U | ||||
| JP2007190439A | ||||
| JP2005185649A | ||||
| JP2008140948A |
Foreign References:
| US20140173853 | ||||
| CN200953924Y |
Attorney, Agent or Firm:
Showa International Patent Office