< Topic >The brush between the gearwheels where the brushing between all gearwheels is possible with just 1 between the gearwheels wide narrow and without designating the choice and the like of the brush which is used as the air, is offered.SolutionsIn the opening of the gearwheel the wide place and there being a narrow place, in order thickness of the brush to be good with just about 1 facing toward Tip direction gradually becomes thin by making the brush of the long me which, regardless of wide narrow between the gearwheels from labor assistant, the brushing to be possible the brush between the gearwheels which are devised.< Choice figure >Drawing 1【課題】歯間の広狭や使用するブラシの選択などを気にすることなく、1本だけで全ての歯間のブラッシングが可能な歯間ブラシを提供する。【解決手段】歯の隙間に広いところや狭いところがあっても、ブラシの太さが手元から先端方向に向かって次第に細くなる長めのブラシとすることにより、歯間の広狭にかかわらず、1本だけで程よくブラッシングできるように工夫した歯間ブラシ。【選択図】図1
