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JP4069188B2 - toothbrush - Google Patents

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JP4069188B2
JP4069188B2 JP52276899A JP52276899A JP4069188B2 JP 4069188 B2 JP4069188 B2 JP 4069188B2 JP 52276899 A JP52276899 A JP 52276899A JP 52276899 A JP52276899 A JP 52276899A JP 4069188 B2 JP4069188 B2 JP 4069188B2
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tufts
head
tuft
toothbrush
handle
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JP2001507981A (en
JP2001507981A5 (en
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ドンナ、ビールズ
メイジ、ウォング―パレデス
トーマス、クレイグ、マスターマン
マイケル、ロバーツ
ブラッドリー、カスティーロ
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ジレット、 カナダ、 カンパニー
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Priority claimed from US09/177,991 external-priority patent/US6308367B1/en
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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A46B9/045—Arranged like in or for toothbrushes specially adapted for cleaning a plurality of tooth surfaces simultaneously
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A46B5/026—Grips or handles having a nonslip section
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Brushes (AREA)

Description

発明の詳細な説明
本発明は、全般的に口腔の手入れ分野に関し、特に歯ブラシに係る。更に本発明は、歯の根本間と歯茎の縁の部分の改善したクリーニングを提供するため三次元的な毛の形状を持つ歯ブラシに関する。
歯磨き及びフロッシング（flossing）は良好な口腔衛生を成すための基本的なステップである。フロッシングを実施することは、フロッシングが良好な口腔衛生の一部として行うべきだと言うことを一般の人々が理解しているとはいえ、不幸にも一般の人々の間に広く受け入れられていなかった。更に時々フロスをする人であっても、口全域に達するよう適切にフロッシングすることは困難でできなかった。不幸にも多くの商用的に有用な歯ブラシが歯の外側の頬側の面を綺麗にできるとはいえ、歯茎の縁の丸い平らなできもの（plaque）や破損した跡（debris）、根元の間の部分、下に面する面及び他の口の中の到達することが困難な部分に改善されたクリーニングを行うことはできなかった。
かかる歯ブラシが最も後方の臼歯（例えば親不知又は第２の臼歯）を適切に綺麗にできない一つの理由は、歯ブラシの柄から最も末端に配置された歯ブラシヘッドに取り付けられた一つ以上の房（tufts）が、柄から延びるヘッドに沿う方向に角度付けられていない即ち曲がっていないからである。このようにこの房は、口の後方の臼歯を十分に綺麗にするため、歯ブラシのヘッドの端部を超えて充分延長していない。
更に柄に対して角度付けられている即ち曲がっている毛の房を持ち、他の房は柄から離れる方向に曲がっている前記ブラシにおいては、かかる全ての房は本質的に同じ長さで、同じ断面をしている。その結果かかる曲がった房は歯の一部分を満足する方法で綺麗にできるが、歯の他の部分は房が均一な長さ、間隔且つ断面をしている理由から十分に綺麗にすることができなかった。
更に従来の歯ブラシはせいぜい３つの異なる型の断面を有する毛の房を備えているものがあった。しかしながらブラシによりクリーニングするに必要な歯の部分は３個より以上（例えば外側の頬に面する面、歯茎の縁、根元の間、下に面する面及び最も後方の臼歯）ある。このように従来のブラシは歯の全ての部分を綺麗にするように特別に設計された十分に変化する断面の房を備えていなかった。
本発明は前述の問題点の一つ以上を克服することを意図する。本発明の一つの見地を簡潔に要約すれば、歯ブラシは、柄、該柄から延びるヘッド、及び該ヘッドに固定即ち取り付けられた毛の複数の房を備える。前記複数の房のうち第１の房は、その第１の房よりも柄から遠い位置ではヘッドに他のいずれの房も固着されないように柄から遠ざかった位置でヘッドに固着された単一の房である。第１の房は、その第１の房が固着されているヘッドの面に対して正接または同一平面にある仮想線（ヘッド面仮想線）に対して約８１°以下に角度付けられ即ち曲がっている。第１の房はヘッドが柄から延びるヘッドに沿う方向に対して柄から離れるように傾斜している。
上述のように第１の房を曲げることにより、この房は歯ブラシのヘッドの端部を超えて延びることができ、これにより口の後方の臼歯を十分に綺麗にすることができる。
また、前記複数の房のうち、第２の房は柄の方向に傾斜し、第３の房はヘッド面仮想線に対して鋭角に角度付けられ、第２及び第３の房は互いに異なる断面を有している。
長さ、断面、色、材料及びその結合において変化する曲がった房を提供することは、歯の一部より以上の部分をこの曲がった房で綺麗にすることができる。例えば一つの型の曲がった房は、歯の頬側の面を綺麗にし、他の型の曲がった房は歯の根本間を綺麗にすることができる。
本発明の第３の見地は、柄と、該柄から延びるヘッドと、該ヘッドに固着された毛の多様な房を具備する歯ブラシを提供することにある。房の多様性は少なくとも５個の異なる型の断面を持つ房を備える。
少なくとも５個の型の断面を有する房を提供することによって、かかる房は適切に歯の全ての部分（例えば頬に面する外側の面、歯茎の縁、根本間の部分、舌に面する面及び最も後方の臼歯）を綺麗にできる。
本発明のこれら並びに他の見地、目的、特徴並びに利点は、以下の本発明の好ましい実施形態の詳細な説明及び特許請求の範囲の記載、並びに添付図面に基づく説明から明確に理解されるであろう。
図１は本発明の実施形態の歯ブラシの斜視図である。
図２は図１の歯ブラシの平面図である。
図３は図１の歯ブラシの側面図である。
図４及び図５は図１の歯ブラシの房のヘツド及び関連部分の部分的な側面図である。
図６は図３の線６−６に沿う歯ブラシのヘツドの部分的な断面図である。
図７は図１の歯ブラシのヘッド及び柄の一部分の斜視図である。
図１乃至３において、歯ブラシ１０は柄部分１２と柄からＤ方向に延びるヘッド部分１４を有する。歯ブラシ１０の全長は約１９．６ｃｍが好ましく、ヘッド１４の幅は最も広い部分で約１．３ｃｍであることが好ましい。柄１２の主部分１６とヘッド１４はポリプロピレンの一体から成る片から構成される。親指握り部分１８、随意の商標２４（好ましくは長さ約２．１ｃｍ）及び指握り部分２０を含む他の部分は好ましくは熱可塑性エラストマー、好ましくはクレートンゴム（kraton rubber）（約５と約７０の間のショアＡ硬さを有するスチレン及びブタジエン又はイソプレン水素添加又は水素非添加オイル充填ブロック共重合体）から構成される。親指握り部分１８と指握り部分２０は、柄の握り力の助けになる一連の１７個の立ち上がったリブ２２を有している。リブ２２は幅１．３ｍｍであることが好ましい。
図３乃至７において、毛の複数の房２６は歯ブラシのヘッド１４に固着即ち取り付けられる。各房は多数の毛から作り上げられ、全ての毛は端が丸くなっていることが好ましい。５つの異なる型の房がヘツドに固着され、房の各型は他の型の房とは面積並びに形状が異なる断面を有している。
房の第１の型２８はポリブチレンテレフタレート（ＰＢＴ）全体に亘り混合されたカオリン粘土分子のような研磨剤を備えるＰＢＴから成る毛で構成される。かかる毛は直径０．１３ｍｍ乃至０．２３ｍｍの間、好ましくは直径０．１８ｍｍである。ヘッド１４の面３０から計った毛の長さは約１１．２ｍｍである。房２８の房を付けられた断面積は約２４ｍｍ2であり、ヘッド面から計った房の体積は約０．２７ｃｍ3（この体積は好ましくは約０．２５ｃｍ3乃至０．２９ｃｍ3の間にある）である。唯一つの型２８の房がヘッド１４に取り付けられ、これはその他の房より柄１４から最も末端にある。
房の第２の型３２はナイロンインジケータ（商標）の型の毛から作られ、６．１２ナイロンから成り外面は青に色付けされている。当業者では周知のように、かかる毛の青色の着色は、ブラシが長時間使用されたとき次第にすり減り歯ブラシの消耗限度を示す。該毛は直径０．１３ｍｍ乃至０．２３ｍｍ、好ましくは直径０．１８ｍｍである。ヘッド１４の面３０から計った毛の長さは約８．９ｍｍである。各房３２の断面積は約２．９ｍｍ2である。図６に示すように型３２の房は丸い断面をしている。８乃至１２の間の本数の型３２の房がヘッド１４に取り付けられている。
第３の型３４の房は、ＰＢＴ全体に亘り混合されたカオリン粘土分子のような研磨剤を備えるＰＢＴから成る毛で構成される。該毛は直径０．１３ｍｍ乃至０．２３ｍｍ、好ましくは直径０．１８ｍｍである。ヘッド１４の面３０から計った毛の長さは約１１．２ｍｍである。各房３４の断面積は約１．７ｍｍ2である。８乃至１２の間の本数の型３２の房がヘッド１４に取り付けられる。図６に示すように型３４の房は長方形状で丸い端をしている。
第４の型３６の房は、ＰＢＴ全体に亘り混合されたカオリン粘土分子のような研磨剤を備えるＰＢＴから成る毛で構成される。該毛は直径０．１３ｍｍ乃至０．２３ｍｍ、好ましくは直径０．１８ｍｍである。ヘッド１４の面３０から計った毛の長さは約１１．２ｍｍである。各房３６の断面積は約２．６ｍｍ2である。４乃至６の間の本数の型３６の房がヘッド１４に取り付けられる。図６に示すように型３６の房は丸い端を持つ長方形状で、型３４の房よりヘッドの横方向に幅広い。第５且つ最後の型３８の房は、ＰＢＴ全体に亘り混合されたカオリン粘土分子のような研磨剤を備えるＰＢＴから成る毛で構成される。該毛は直径０．１３ｍｍ乃至０．２３ｍｍ、好ましくは直径０．１５ｍｍである。ヘッド１４の面３０から計った毛の長さは約８．９ｍｍである。各房３８の断面積は約５．４ｍｍ2である。４乃至６の間の本数の型３８の房がヘッド１４に取り付けられる。図６に示すように型３８の房は丸い端を持つ長方形状で、型３６の房より幅広い。
前述したように各房の断面積についてみると、型２８の房はヘッド１４に取り付けられた他の何れの房より４倍以上の大きな断面を有する。各房の毛が前述のように特定な材料から構成されることについて述べたが、他の材料も使用できる。ヘッド１１に取り付けられる何れの毛も、通常例えばカオリン粘土のような研磨剤を用いるか又は用いないＰＢＴ、研磨剤を用いるか又は用いない６．１２ナイロン、又は研磨剤を用いるか又は用いないナイロンインジケータ（商標）から構成される。
更に房の中及び房の間の毛は、長さ、直径、断面形状、断面積、色を変更でき且つ異なる材料から構成される。
図６に示すように、ヘッドの前方自由端部には第１の型の房２８が設けられ、それより後方の構部域には長手方向に延びる３列の房が配列されている。すなわち、中央の列には房３６と房３８が長手方向に交互に配列され、左右の列には房３２と房３４が長手方向に交互に配列されており、図４および図５に示すように、長手方向の各列における隣接する房は長さが長いものと短いものとが交互になるように配設されている。
図２，４，５と７に示すように、ヘッド１４の全ての房は方向Ｄ又は方向Ｄの反対の方向に対し、ヘッド１４の面３０に正接している仮想線に対し好ましくは８１°より以下、より好ましくは約６９°乃至約８１°の間、更に最も好ましくは７５°角度を成す。面３０がカーブしておらずむしろ平坦で有れば、線４０は面３０に対し同一平面になる。房の２つの外側列４２は方向Ｄに対し柄１２から離れる方向に角度付けられている。房の内側列４４は、方向Ｄに対し柄１２から離れるように傾斜している大きな房２８を除いて、方向Ｄと反対方向に柄１２に向けて傾斜されている。
歯ブラシ１０は当業者が周知のように次の方法で製造される。房の毛の各々は選択された材料、長さ且つ直径を有しており、この毛を所望の量一体に集めることにより房が形成される。次いで房は射出成型機のモールドの一部の開口に挿入される。モールド凹所にある又は挿入された房の端部は溶融され、房の端部で溶融した固まり又はボールができるように毛が互いに接合される。房を支持するモールド部分は、歯ブラシの主部分１６を形成するのに使用される凹所を一体に画定するモールドの他の部分と接合される。房の溶融した集まりは凹所内に配置される。
次いでポリプロピレンが凹所に射出され歯ブラシ１０の部分１６を成型する。部分的に完成した歯ブラシが第２の射出成型ステーションに移動される位置で、ポリプロピレンは冷却される。冷却され固化したポリプロピレンは歯ブラシのヘッド１４に房の溶融した集まりを固着する。第２の射出成型ステーションにおいて、部分的に完成したブラシは凹所を有する第２のモールドに押し込まれ親指握り部分１８、商標２４及び指握り部分２０を成型する。熱可塑性エラストマーはモールドに射出され、該エラストマーが冷却され歯ブラシ１０が完成した後、歯ブラシ１０はモールドから取り出される。次いで歯ブラシは包装される。The present invention relates generally to the field of oral care, and in particular to toothbrushes. The present invention further relates to a toothbrush having a three-dimensional bristle shape to provide improved cleaning of the roots of the teeth and the edges of the gums.
Tooth brushing and flossing are the basic steps for good oral hygiene. Unfortunately, although the general public understands that flossing should be done as part of good oral hygiene, it is unfortunately not widely accepted by the general public It was. Furthermore, even a person who flosses occasionally cannot properly floss to reach the entire mouth. Unfortunately, many commercially useful toothbrushes can clean the buccal surface on the outside of the teeth, but the rounded flats (plaques), debris, and roots of the gums Improved cleaning could not be performed on the intervening parts, the lower surface and other difficult-to-reach parts in the mouth.
One reason that such toothbrushes cannot properly clean the rearmost molars (eg, ignorant or second molars) is that one or more tufts attached to the toothbrush head located distally from the toothbrush handle. Is not angled in the direction along the head extending from the handle. Thus, the tuft does not extend well beyond the end of the toothbrush head in order to clean the molars behind the mouth sufficiently.
In addition, in the brush, which has a tuft of hair that is angled or bent with respect to the handle and the other tufts are bent away from the handle, all such tufts are essentially the same length, Have the same cross section. As a result, such bent tresses can be cleaned in a way that satisfies part of the teeth, but other parts of the teeth can be cleaned sufficiently because the tresses have a uniform length, spacing and cross-section. There wasn't.
In addition, some conventional toothbrushes have at most three tufts of bristle with different types of cross-sections. However, there are more than three parts of the tooth that need to be cleaned with a brush (eg, the outer cheek-facing surface, the gum rim, between the roots, the lower-facing surface, and the rearmost molar). Thus, conventional brushes did not have fully varying cross-section tufts specially designed to clean all parts of the teeth.
The present invention is intended to overcome one or more of the problems set forth above. Briefly summarizing one aspect of the present invention, a toothbrush comprises a handle, a head extending from the handle, and a plurality of tufts of bristles fixed or attached to the head. Of the plurality of tufts, a first tuft is a single tuft fixed to the head at a position away from the handle so that no other tuft is fixed to the head at a position farther from the handle than the first tuft . It is a bunch . The first tuft, the first tufts are attached are namely bent angle below about 81 ° respect to the virtual line (head surface phantom) in the tangential or flush against the face of the head is fixed Yes. The first tuft is inclined so that the head is away from the handle relative to the direction along the head extending from the handle.
By bending the first tufts, as described above, the tufts may extend beyond the end of the toothbrush head, thereby the back of the molars of the mouth can be sufficiently clean.
Of the plurality of tufts, the second tuft is inclined in the direction of the handle, the third tuft is angled at an acute angle with respect to the imaginary line of the head surface, and the second and third tufts have different cross sections. have.
Providing a bent tuft that varies in length, cross-section, color, material, and combination can clean more than a portion of the tooth with this bent tuft. For example, one type of bent tuft can clean the buccal surface of the tooth, and the other type of bent tuft can clean the root of the tooth.
A third aspect of the present invention is to provide a toothbrush comprising a handle, a head extending from the handle, and various tufts of hairs secured to the head. Tuft diversity comprises tufts with at least five different types of cross sections.
By providing a tuft having at least five types of cross-sections, such tuft is suitably suitable for all parts of the tooth (eg, the cheek-facing outer face, gum rim, root-to-root part, tongue-facing face). And the rearmost molar).
These and other aspects, objects, features and advantages of the present invention will be clearly understood from the following detailed description of the preferred embodiments of the invention, the appended claims, and the description based on the accompanying drawings. Let's go.
FIG. 1 is a perspective view of a toothbrush according to an embodiment of the present invention.
FIG. 2 is a plan view of the toothbrush of FIG.
FIG. 3 is a side view of the toothbrush of FIG.
4 and 5 are partial side views of the head and associated portions of the toothbrush tuft of FIG.
FIG. 6 is a partial cross-sectional view of the toothbrush head taken along line 6-6 of FIG.
FIG. 7 is a perspective view of a portion of the head and handle of the toothbrush of FIG.
1 to 3, the toothbrush 10 has a handle portion 12 and a head portion 14 extending in the D direction from the handle. The total length of the toothbrush 10 is preferably about 19.6 cm, and the width of the head 14 is preferably about 1.3 cm at the widest portion. The main portion 16 and the head 14 of the handle 12 are composed of a single piece of polypropylene. Other parts, including thumb grip portion 18, optional trademark 24 (preferably about 2.1 cm long) and finger grip portion 20, are preferably thermoplastic elastomers, preferably kraton rubber (about 5 and about 70). Styrene and butadiene or isoprene hydrogenated or non-hydrogenated oil-filled block copolymer having a Shore A hardness of between. The thumb grip portion 18 and the finger grip portion 20 have a series of 17 raised ribs 22 that aid in gripping the handle. The rib 22 preferably has a width of 1.3 mm.
3-7, the plurality of tufts 26 of hair are secured or attached to the head 14 of the toothbrush. Each tress is made up of a number of hairs, preferably all hairs are rounded at the ends. Five different types of tufts are affixed to the head and each tuft has a cross-section that differs in area and shape from the other tufts.
The first mold 28 of the tuft is composed of hair made of PBT with an abrasive such as kaolin clay molecules mixed throughout polybutylene terephthalate (PBT). Such bristles are between 0.13 mm and 0.23 mm in diameter, preferably 0.18 mm in diameter. The length of the hair measured from the surface 30 of the head 14 is about 11.2 mm. Sectional area which is tufted tufts 28 is about 24 mm 2, the volume of the tuft measured from the head surface of about 0.27 cm 3 (during this volume is preferably from about 0.25 cm 3 to 0.29 cm 3 Yes). Only one mold 28 tuft is attached to the head 14, which is farthest from the handle 14 than the other tufts.
The second mold 32 of the tuft is made from the hair of the nylon indicator ™ mold and is made of 6.12 nylon and the outer surface is colored blue. As is well known to those skilled in the art, the blue coloration of such bristles will gradually wear out when the brush is used for extended periods of time, indicating the wear limit of the toothbrush. The bristles have a diameter of 0.13 mm to 0.23 mm, preferably a diameter of 0.18 mm. The length of the hair measured from the surface 30 of the head 14 is about 8.9 mm. The cross-sectional area of each tuft 32 is about 2.9 mm 2 . As shown in FIG. 6, the tuft of the mold 32 has a round cross section. Between eight and twelve mold 32 tufts are attached to the head 14.
The tufts of the third mold 34 are composed of hair made of PBT with an abrasive such as kaolin clay molecules mixed throughout the PBT. The bristles have a diameter of 0.13 mm to 0.23 mm, preferably a diameter of 0.18 mm. The length of the hair measured from the surface 30 of the head 14 is about 11.2 mm. The cross-sectional area of each tuft 34 is about 1.7 mm 2 . Between eight and twelve mold 32 tufts are attached to the head 14. As shown in FIG. 6, the tuft of the mold 34 is rectangular and rounded.
The tufts of the fourth mold 36 are composed of hair made of PBT with an abrasive such as kaolin clay molecules mixed throughout the PBT. The bristles have a diameter of 0.13 mm to 0.23 mm, preferably a diameter of 0.18 mm. The length of the hair measured from the surface 30 of the head 14 is about 11.2 mm. The cross-sectional area of each tuft 36 is about 2.6 mm 2 . Four to six tufts of mold 36 are attached to the head 14. As shown in FIG. 6, the tuft of the mold 36 has a rectangular shape with round ends, and is wider than the tuft of the mold 34 in the lateral direction of the head. The fifth and last mold 38 tufts are composed of bristles made of PBT with an abrasive such as kaolin clay molecules mixed throughout the PBT. The bristles have a diameter of 0.13 mm to 0.23 mm, preferably a diameter of 0.15 mm. The length of the hair measured from the surface 30 of the head 14 is about 8.9 mm. The cross-sectional area of each tuft 38 is about 5.4 mm 2 . Four to six tufts of mold 38 are attached to the head 14. As shown in FIG. 6, the tufts of the mold 38 are rectangular with rounded ends and are wider than the tufts of the mold 36.
As described above, regarding the cross-sectional area of each tuft, the tuft of the mold 28 has a cross section that is four times larger than any other tuft attached to the head 14. Although each tuft has been described as being made of a specific material as described above, other materials can be used. Any hair attached to the head 11 is typically PBT with or without abrasives such as kaolin clay, 6.12 nylon with or without abrasives, or nylon with or without abrasives It consists of an indicator (trademark).
Furthermore, the hairs in and between the tufts can be varied in length, diameter, cross-sectional shape, cross-sectional area, color and are composed of different materials.
As shown in FIG. 6, a first-type tuft 28 is provided at the front free end of the head, and three rows of tufts extending in the longitudinal direction are arranged in the rear structure area. That is, tufts 36 and tufts 38 are alternately arranged in the longitudinal direction in the center row, and tufts 32 and tufts 34 are alternately arranged in the longitudinal direction in the left and right rows, as shown in FIGS. In addition, adjacent tufts in each column in the longitudinal direction are arranged so that long ones and short ones alternate.
As shown in FIGS. 2, 4, 5 and 7, all tufts of the head 14 are preferably 81 ° to the imaginary line tangent to the face 30 of the head 14 with respect to the direction D or the direction opposite to the direction D. Less than, more preferably between about 69 ° to about 81 °, and most preferably a 75 ° angle. If the surface 30 is not curved but rather flat, the line 40 is coplanar with the surface 30. The two outer rows 42 of tufts are angled away from the handle 12 with respect to the direction D. The inner tuft 44 of the tufts is tilted toward the handle 12 in the opposite direction to the direction D, except for the large tuft 28 which is tilted away from the handle 12 with respect to the direction D.
The toothbrush 10 is manufactured by the following method as is well known to those skilled in the art. Each tuft of hair has a selected material, length and diameter, and a tuft is formed by collecting the desired amount of hair together. The tuft is then inserted into a partial opening in the mold of the injection molding machine. The ends of the tufts in or inserted into the mold recess are melted and the hairs are joined together so that a molten mass or ball is formed at the tuft ends. The mold part that supports the tuft is joined with the other part of the mold that integrally defines the recess used to form the main part 16 of the toothbrush. The molten mass of tufts is placed in the recess.
Polypropylene is then injected into the recess to mold the portion 16 of the toothbrush 10. The polypropylene is cooled at the location where the partially completed toothbrush is moved to the second injection molding station. The cooled and solidified polypropylene adheres the molten mass of tufts to the head 14 of the toothbrush. At the second injection molding station, the partially completed brush is pressed into a second mold having a recess to mold the thumb grip portion 18, trademark 24 and finger grip portion 20. The thermoplastic elastomer is injected into the mold, and after cooling the elastomer and completing the toothbrush 10, the toothbrush 10 is removed from the mold. The toothbrush is then packaged.

Claims (11)

柄と、該柄から延びるヘッドと、該ヘッドに固着された複数の毛の房とを備えた歯ブラシにおいて、
前記複数の房のうち第１の房は、その第１の房よりも前記柄から遠い位置では前記ヘッドに他のいずれの房も固着されないように前記柄から遠ざかった位置で前記ヘッドに固着された単一の房であり、
前記第１の房は、その第１の房が固着されている前記ヘッドの面に対して正接または同一平面にあるヘッド面仮想線に対し約８１°以下に角度付けられ、
前記第１の房は前記ヘッドが前記柄から延びる方向に対して前記柄から遠ざかり方向に傾斜しており、
前記複数の房のうち第２の房は前記柄の方向に傾斜し、
前記複数の房のうち第３の房は前記ヘッド面仮想線に対して鋭角に角度付けられ、
前記第２及び第３の房は互いに異なる断面を有している、歯ブラシ。And pattern, a head extending from該柄, in a toothbrush having a plurality of tufts of bristles secured to the head,
The first tuft of the plurality of tufts is secured to the head at that in a first position remote from the handle than the tufts moves away from the handle so as not to be fixed also any other tuft on the head position Single bunch ,
It said first tuft, angled at about 81 ° or less with respect to the head surface imaginary line in its first tufts against the face of the head are secured tangent or flush,
The first tuft is inclined in a direction away from said handle with respect to the direction in which the head extends from the handle,
A second tuft of the plurality of tufts is inclined in the direction of the handle,
A third tuft of the tufts is angled at an acute angle with respect to the head surface imaginary line,
A toothbrush in which the second and third tufts have different cross sections . 前記第１の房は、前記ヘッド面仮想線から約６９°乃至８１°傾斜されている、請求項１記載の歯ブラシ。The toothbrush of claim 1, wherein the first tuft is inclined about 69 ° to 81 ° from the imaginary line of the head surface . 前記第１の房は、前記ヘッド面仮想線から約７５°傾斜されている、請求項２記載の歯ブラシ。The toothbrush according to claim 2, wherein the first tuft is inclined about 75 ° from the imaginary line of the head surface . 前記第２及び第３の房は前記ヘッドの面から計って互いに異なる長さを有する、請求項１乃至３にいずれかに記載の歯ブラシ。 The second and third tufts have different lengths measured from the plane of the head, the toothbrush according to any one to claims 1 to 3. 前記第２及び第３の房は長さが互いに約２．３ｍｍ異なっている、請求項４記載の歯ブラシ。The toothbrush of claim 4, wherein the second and third tufts differ from each other in length by about 2.3 mm. 前記房の断面は、互いに形状が異なっている、請求項１乃至５のいずれかに記載の歯ブラシ。The toothbrush according to any one of claims 1 to 5 , wherein cross sections of the tufts are different from each other . 前記房の断面は、互いに面積が異なっている、請求項１乃至６のいずれかに記載の歯ブラシ。The toothbrush according to any one of claims 1 to 6 , wherein cross sections of the tufts have different areas . 前記第１の房の断面積は、前記第２の房または前記ヘッドに固着されている他の房の断面積の少なくとも８倍である、請求項１乃至７のいずれかに記載の歯ブラシ。 The cross-sectional area of the first tufts is at least 8 times the cross-sectional area of the other tufts are secured to the second tufts, or the head, the toothbrush according to any one of claims 1 to 7. 前記第１の房が前記ヘッドに固着されている位置と同等に前記柄から遠ざかった位置では、他のいずれの房も前記ヘッドに固着されていない、請求項１乃至８のいずれかに記載の歯ブラシ。 Wherein in the position where the first bunch moves away from the handle to the equivalent position which is fixed to the head, also any other tuft is not fixed to the head, according to any one of claims 1 to 8 toothbrush. 前記第１の房は、前記ヘッドの面から計って０．２４乃至０．２９ｃｍ3の体積を有する、請求項１乃至９のいずれかに記載の歯ブラシ。 The first tufts may have a volume of measured from surface 0.24 to 0.29 cm 3 of the head, the toothbrush according to any one of claims 1 to 9. 前記ヘッドに固着された毛は互いに異なる特性を有し、その特性は長さ、直径、断面積、断面形状、色、材料及びその組合わせからなる群から選択されている、請求項１乃至１０のいずれかに記載の歯ブラシ。 The hairs fixed to the head have different characteristics, and the characteristics are selected from the group consisting of length, diameter, cross-sectional area, cross-sectional shape, color, material, and combinations thereof. The toothbrush in any one of.
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