Login| Sign Up| Help| Contact|

Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/025751
Kind Code:
The objective of the present invention is to provide a toothbrush which is excellent in terms of maintaining and dispersing a preparation on a brush upper portion, and with which satisfactory foaming can be achieved. A toothbrush which is equipped with a handle provided with a head portion (4) at a tip end thereof, and in which bundles of bristles are implanted in a plurality of bristle implanting holes formed in a bristle implanting surface (5) of the head portion, wherein the bristle implanting surface includes: a central bristle implanting region in which a plurality of central bristle bundles (12) which are arranged side by side in an axial direction of the handle are implanted in substantially the center in the width direction perpendicular to the axis; and an outside bristle implanting region in which a plurality of outside bristle bundles (22) are implanted sandwiching the central bristle bundles in the width direction. The central bristle bundles are formed from tip-branched bristles having a tip-branched portion at the tip of a body portion. A value expressed as the maximum width across the tip-branched portions (12B) in the central bristle bundles/the diameter of the bristle bundle formed by the body portions in a base portion (12A) of the central bristle bundles is more than 1.0 and at most equal to 2.0. A bristle implanting density obtained by dividing the total number of bristles forming the tip-branched portion by the surface area of the central bristle implanting region is at least equal to 1000 bristles/cm2 and at most equal to 5000 bristles/cm2.

TAKAHASHI Jun (3-7 Honjo 1-chome, Sumida-k, Tokyo 44, 〒1308644, JP)
HAKAMATA Yusuke (3-7 Honjo 1-chome, Sumida-k, Tokyo 44, 〒1308644, JP)
ABE Tetsuya (3-7 Honjo 1-chome, Sumida-k, Tokyo 44, 〒1308644, JP)
Application Number:
Publication Date:
February 08, 2018
Filing Date:
July 27, 2017
Export Citation:
Click for automatic bibliography generation   Help
LION CORPORATION (3-7 Honjo 1-chome, Sumida-ku Tokyo, 44, 〒1308644, JP)
International Classes:
A46B9/04; A46D1/05
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
TAZAKI Akira et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
Download PDF: