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Patent Searching and Data


Title:
TOOTHBRUSH
Document Type and Number:
WIPO Patent Application WO/2020/262346
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a toothbrush that enables an adequate reduction in excessive brushing pressure. In the present invention, a head part and a neck part have: a deformation part (70) at least a portion of which is formed from a hard resin, which is disposed on a gripping part, and which is deformed by an external force in a first direction that orthogonally intersects a bristle surface; a first region that is disposed on a distal end side of the deformation part and that is not deformed by the external force in the first direction; and a second region that is disposed on a rear end side of the deformation part and that is not deformed by the external force in the first direction. The gripping part is formed from a hard resin at least partially in a cross-section that orthogonally intersects a longitudinal direction, at least from a distal end of the gripping part to the second region in the longitudinal direction. The deformation part has: a planar hard section (70H) that is formed from a hard resin; and a soft section (70E) that is formed from a soft resin and that coats at least a portion of the hard section. The ratio at which the cross-sectional area of the hard section occupies relative to the cross-sectional area of the deformation part is 35% or less along the longitudinal direction; and if the thickness of the hard section in the first direction is T and the width thereof in a second direction is W, the relationship T/W<1 is satisfied along the longitudinal direction.

Inventors:
HACHISUKA Ryosuke (JP)
Application Number:
JP2020/024518
Publication Date:
December 30, 2020
Filing Date:
June 23, 2020
Export Citation:
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Assignee:
LION CORPORATION (JP)
International Classes:
A46B5/00; A46B5/06
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
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