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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2020/262339
Kind Code:
The purpose of the present invention is to provide a toothbrush having good operability whereby it is possible to thoroughly brush a target site while maintaining an appropriate brushing pressure. This toothbrush comprises: a deformable section (70) that is arranged on a grip section (30) and that is deformed by external force acting in a first direction orthogonal to a bristle implantation surface (11); and a first area and a second area not deformed by external force. The deformable section comprises a hard section (H) formed from a hard resin connecting the first area and the second area and a flexible section (E) formed from a flexible resin and covering at least part of the hard section. The proportion occupied by the cross-sectional area of the hard section with respect to the cross-sectional area of the outer contour of the deformable section or of a closed space surrounded by the extended lines of the outer contour is 35% or less along the long axis direction, the bending strength of the deformable section in the first direction is limited so as to be less than the bending strength in a second direction orthogonal to the long axis direction and the first direction, the flexible section has a recess/protrusion structure (101) in which recesses and protrusions extending in a direction intersecting the long axis direction are adjacent to each other, and the recess/protrusion structure is exposed on each of the bristle implantation surface side and the back surface side in the first direction.

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Application Number:
Publication Date:
December 30, 2020
Filing Date:
June 23, 2020
Export Citation:
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International Classes:
A46B5/00; A46B5/06
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
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