This creation is the structure-improved of brush between a kind of related tooth of what, particularly relates to a kind of structure-improved of brush spindle between what tooth. It is mainly to be equipped with annular groove by the shank part brushed between mold what tooth,And it is formed with convex block in what annular groove,And the convex block can preset into moulding,Injection molding Hou is projected in conjunction with a coating member through secondary again,And the sets of holes of hollow out are just formed on the coating member,Shape corresponds to the forming of the convex block in annular groove,For coating and filling up annular groove,And then cooperate with convex block and fill and lead up annular groove,Keep shank part concordant,And brush ontology is deliberately different colours between the coating member and tooth,When secondary injection Hou,Because color is different,And can clearly show the convex block on a what shank part,Brush shows beautiful and has quite ideal advertising results between helping what tooth.本創作係有關於一種牙間刷之改良結構，特別是指一種於牙間刷握柄的改良結構。其主要係藉由模具於牙間刷的握柄部設有環槽，並於環槽內形成有凸塊，而該凸塊能預先設定成造型，射出成形後再經二次射出與一包覆件結合，而該包覆件上正好形成有鏤空的套孔，形狀對應環槽內的凸塊成形，供包覆並填補環槽，進而與凸塊配合將環槽填平，使握柄部平齊，且該包覆件與牙間刷本體刻意為不同顏色，當二次射出後，因顏色不同，而能明確地顯示出位於握柄部上的凸塊，有助於牙間刷呈現出美觀且具有相當理想的廣告效果。
