Interdental brush

A - Human Necessities – 46 – B

Patent

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Details

A46B 3/18 (2006.01) A46D 1/00 (2006.01) A61C 15/00 (2006.01) A61C 17/00 (2006.01)

Patent

CA 2738815

Provided is an interdental brush having a wire and filaments arranged therein by folding the wire and disposing the filaments between the wire and then twisting the wire. The interdental brush has improved filament retention and improved cleaning effectivity and reachability to minute portions. Each of filaments 3 has a polygonal cross section whose at least one corner portion has an interior angle 31 as acute as 30 to 75 degrees. Specifically, an angle .theta.3 of the acute corner portion 31 is set at 1.2 to 3 times a twisting angle .theta.4 of the wire. The filaments each have two or more such acute corner portions, and two or more rows of such filaments are disposed and laminated between the wire in a densely arranged manner.

Linvention concerne une brosse interdentaire, dans laquelle des filaments sont implantés par insertion en sandwich des filaments entre des fils repliés et par torsion desdits filaments. La brosse interdentaire peut améliorer non seulement la résistance à la chute mais également leffet nettoyant et la possibilité datteindre en détail les filaments. Les filaments (3) présentent une section transversale polygonale, dans laquelle au moins un angle interne (31) est aigu dans la plage de 30 à 75 degrés. En particulier, la partie angle aigu (31) présente un angle (?3) 1,2 à 3 fois plus grand que langle de torsion (?4) des fils. Les filaments présentent deux parties à angle aigu ou plus, et sont implantés de façon dense et serrée dans un état stratifié de deux rangées ou plus entre les fils.

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