Toothbrush and toothbrush head for said toothbrush

A technology for toothbrush heads and toothbrushes, applied in the field of toothbrush heads, can solve the problem of not being able to enter the interdental gap easily, and achieve the effect of avoiding bending and large bending rigidity

Inactive Publication Date: 2008-05-07
BRAUN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This still doesn't really make it easier to get into the interdental space as long as each filament doesn't have a sufficient point or taper at its free end on its own

Method used

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  • Toothbrush and toothbrush head for said toothbrush
  • Toothbrush and toothbrush head for said toothbrush
  • Toothbrush and toothbrush head for said toothbrush

Examples

Experimental program
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Embodiment Construction

[0037]FIGS. 1 and 2 show filaments or toothbrush bristles 1 which are inserted into a bristle carrier 2 of a toothbrush head which is not shown in detail in FIGS. 1 and 2 . At its root, the filament 1 has a substantially cylindrical shape that sharpens on both sides towards the free end 3 of the filament 1 . In the embodiment according to FIGS. 1 and 2, the sharpening 4 of the free end 3 of the filament 1 is formed by two opposing bevels 5 and 6 forming an acute angle with each other, which are flat in the illustrated embodiment. to constitute. In this case, the two bevels 5 and 6 form a wedge angle 7 of approximately 20° to 25° in the exemplary embodiment shown, wherein the two bevels 5 and 6 are arranged in such a way that they are formed at the free end 3 Ridges in a straight line.

[0038] Therein, in the illustrated embodiment, the sharpening 4 is flattened at its head. The bevels 5 and 6 do not completely merge into a mathematical line at the free end 3 , but are slig...

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PUM

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Abstract

The invention relates to a toothbrush head having a bristle carrier on which tufts of bristles are arranged, the bristle tufts having a plurality of filaments, wherein at least one of the filaments has a tapering portion towards its free end; the present invention The invention also relates to a toothbrush with such a toothbrush head. It is disclosed that at the tip of at least one filament, the tapered portion is given a profile deviating from a rotationally symmetrical shape in order to maintain a high bending stiffness of the filament in one direction. According to the invention, the constriction is formed in the form of a coined sharpening, so that the filaments in the region of the constriction relative to the first transverse axis are more rigid than in the region of the constriction relative to the second transverse axis perpendicular thereto. Has greater bending stiffness. The cross-section of the filament in the region of the coining sharpening has a longitudinal axis or major axis and a shorter transverse axis or minor axis, so that the filament obtains different planes in the region of the sharpening with respect to the two said axes moment of inertia. The coined sharpening at the tip of the filament facilitates the insertion into the interdental gap, and here the high areal moment of inertia of the broad sides prevents bending.

Description

technical field [0001] The invention relates to a toothbrush head having a bristle carrier on which tufts of bristles are arranged, the bristle tufts having a plurality of filaments, wherein at least one of the filaments has a tapering portion towards its free end; the invention It also relates to a toothbrush with such a toothbrush head. Background technique [0002] A bristle for a toothbrush is known in which the filaments of the bristle have a smaller diameter at the free end than at the root. These generally conical or rocket-shaped points are supposed to facilitate the threading of the thread into the interdental spaces in order to better clean said interdental spaces. However, such a sharp point of the filament leads to a low bending stiffness, so that penetration is not possible or becomes difficult. The areal moment of inertia of the filament is reduced by the tapering so that the filament is too flexible in the direction of the interdental space and can no longer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A46B9/04A46D1/00
CPCA46D1/00A46B2200/1066A46D1/0276A46D1/05A46B9/04A46D1/04
Inventor 卡尔·赫尔措格
Owner BRAUN AG
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