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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2020/262352
Kind Code:
An objective of the present invention is to provide a toothbrush which is easy to use and allows brushing to be carried out at an appropriate brushing pressure even when excessive brushing pressure is applied. This toothbrush has: a deformable part (70) which is positioned on a grip part (30) and deforms when external force in a first direction perpendicular to a bristled surface is applied; a first region (A1) which does not deform from the external force in the first direction; and a second region (A2) which does not deform from the external force in the first direction. The deformable part comprises: a rigid part (70H) which is formed from a rigid resin and connects the first region and the second region; and a soft part which is formed from a soft resin and covers at least a portion of the rigid part. The rigid part satisfies the relationship W > d over the major axis direction, where d is the length in the first direction and W is the length in a second direction perpendicular to the major axis direction and the first direction. The length d of the rigid part in the first direction and/or the length W of the rigid part in the second direction gradually becomes larger from a leading end in the major axis direction toward a trailing end and gradually becomes smaller after reaching a maximum.

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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