JP2008154808A

JP2008154808A - Toothbrush

Info

Publication number: JP2008154808A
Application number: JP2006347238A
Authority: JP
Inventors: Ai Onishi; 愛大西; Toshiaki Kobayashi; 利彰小林
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2006-12-25
Filing date: 2006-12-25
Publication date: 2008-07-10

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toothbrush which removes stain that is especially pigmented soil effectively while it can brush away the plaque of details such as a tooth surface, the cervical portion of a tooth, and an interdental part efficiently. <P>SOLUTION: A head part is provided with a plurality of bristle planting holes in a bristle planting surface. A toothbrush plants the bristle tuft of brushes in each bristle planting hole of this bristle planting surface. One bristle tuft row of brushes which are implanted in the bristle planting hole which ranges from 2.0 mm to 2.8 mm in inside diameter is at least arranged in the center along the longitudinal direction of the head part. One bristle bundle row of brushes which are implanted in the bristle planting hole which is smaller than the bristle planting hole of the central bristle tuft row and ranges from 1.2 mm to 1.6 mm in inside diameter is at least arranged on both external sides of the central bristle tuft row. The ratio of the total area of the central bristle planting hole to the total area of both the external sides bristle planting hole ranges from 1:0.6 to 1:2.8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、歯ブラシに関し、詳しくは、色素着色汚れであるステインを除去するのに効果的な歯ブラシに関する。 The present invention relates to a toothbrush, and more particularly to a toothbrush that is effective in removing stains that are pigmented stains.

口腔内清掃具である歯ブラシにおいて、従来から、歯垢除去効果を高めるために、刷毛を束ねた毛束のヘッド部への植設に工夫がなされてきた。
近年の衛生志向の高まりにより、様々な口腔内清掃具や口腔内洗浄剤が開発されるとともに、歯ブラシにも、単に歯垢除去効果を高めるだけでなく、お茶やコーヒー・紅茶、赤ワインなど色の強い飲食物の色素やタバコが原因の着色汚れであるステインの除去効果など、多機能性が求められるようになった。 Conventionally, in a toothbrush that is an intraoral cleaning tool, in order to enhance the plaque removal effect, a device has been devised for implanting a hair bundle in which a brush is bundled into a head portion.
With the recent increase in hygiene orientation, various types of oral cleaning tools and cleaning agents have been developed, and toothbrushes not only improve the plaque removal effect, but also have colors such as tea, coffee / tea, and red wine. Multifunctionality has come to be demanded, such as the effect of removing stains that are coloring stains caused by strong food pigments and tobacco.

最も基本的な歯ブラシの毛束の配列としては、ヘッド部の植毛面に、均一な直径の毛束がほぼ規則正しく碁盤目状あるいは千鳥状に配列されたものであるが、複雑な形状の口腔内に合わせて、より効果的な歯垢除去力が得られるように、植毛部に異径穴を組み合わせたものや、毛切りに工夫を凝らした歯ブラシなど種々提案されている。
例えば、特許文献１には、ヘッド部長手方向に沿って両側部に位置する外側毛束列の刷毛長が、内側毛束列よりも長い歯ブラシが記載されている。
特許文献２には、逆に、中央が高くなるように、中央に大穴の毛束列を配設して、その外側に小径毛束列を低く配設した歯ブラシが記載されている。
特許文献３には、１束で１つの山形を形成する毛束と、２束で１つの山形を形成する毛束を混在させた歯ブラシが記載されている。
特許文献４には、中央に大穴の毛束列を配設し、小径毛束が正三角形または正方形になるよう３束または４束ずつ成した列が、その外側を取り囲むように配設した歯ブラシが記載されている。 The most basic arrangement of toothbrush bristles is that the bristles of uniform diameter are arranged in a regular grid pattern or staggered pattern on the flocked surface of the head. In order to obtain a more effective plaque removal force, various combinations such as a combination of different diameter holes in the flocked portion and a toothbrush that has been devised for hair cutting have been proposed.
For example, Patent Literature 1 describes a toothbrush in which the brush length of an outer bristle bundle located on both sides along the longitudinal direction of the head is longer than that of the inner bristle bundle.
On the other hand, Patent Document 2 describes a toothbrush in which a large bundle of bristles is arranged in the center so that the center is high, and a small bristles are arranged on the outside.
Patent Document 3 describes a toothbrush in which a hair bundle that forms one chevron by one bundle and a hair bundle that forms one chevron by two bundles are mixed.
Patent Document 4 discloses a toothbrush in which a row of bristles with a large hole is arranged at the center, and a row of 3 or 4 bundles of small-diameter bristles is arranged in a regular triangle or square so as to surround the outside. Is described.

しかしながら、特許文献１に記載の歯ブラシでは、毛束径に関する規定が特にされておらず、両側部の毛束が大きいと毛腰が強くなりすぎて、ブラッシング圧のコントロールが困難となり、歯肉への当たり心地が低下するが、両側部の毛束が小さいと毛腰が弱くなりすぎて、歯面の刷掃効果が低下するという課題がある。
特許文献２に記載の歯ブラシでは、毛切り形状が凸状であるため、歯間部・歯頸部などの細かい部分に毛先が進入しにくく、歯頸部に当てる角度を適切に保ちながらブラッシングすることが大変であり、操作性に劣ると考えられる。
特許文献３に記載の歯ブラシでは、歯間部への毛先進入性には優れるものの、すべての毛束を山切りにしているため、歯面を刷掃する際に歯面に接することのできる毛先の面積が小さくなり、歯面に対する刷掃は低下すると考えられる。
特許文献４に記載の歯ブラシでは、外側毛束の間隔が狭いため、歯当たりの柔らかい刷掃感触が得られる反面、毛腰が弱く歯牙表面の刷掃効率が悪くなり、刷掃実感も劣ると考えられる。
特開２０００−１４４５１号公報特開２００１−３５３０２５号公報特開２００２−２５３３４５号公報特開２００３−９３１５７号公報 However, in the toothbrush described in Patent Document 1, there is no particular regulation regarding the hair bundle diameter, and if the hair bundles on both sides are large, the hair and hips become too strong, making it difficult to control the brushing pressure. Although the contact comfort is reduced, there is a problem that if the hair bundles on both sides are small, the hair and hips become too weak and the tooth surface brushing effect is reduced.
In the toothbrush described in Patent Document 2, since the hair cutting shape is convex, it is difficult for the hair tips to enter fine parts such as interdental parts and cervical parts, and brushing while keeping the angle applied to the cervical parts appropriately It is difficult to do and is considered to be inferior in operability.
In the toothbrush described in Patent Document 3, although the hair tip penetration into the interdental portion is excellent, all the hair bundles are chopped so that the tooth surface can be contacted when the tooth surface is wiped. It is considered that the area of the bristles becomes smaller and the brushing on the tooth surface decreases.
In the toothbrush described in Patent Document 4, since the distance between the outer hair bundles is narrow, a soft brushing feeling per tooth can be obtained, but on the other hand, the brushing is weak and the brushing efficiency of the tooth surface is deteriorated and the brushing feeling is inferior. It is done.
JP 2000-14451 A JP 2001-353025 A JP 2002-253345 A JP 2003-93157 A

上記の歯ブラシはいずれも、歯の表面に付着した食物残渣や細菌からなる歯垢の除去力には優れているが、ステイン除去に関する言及は成されていなかった。
ステインは、お茶やコーヒー・紅茶、赤ワインなど色の強い飲食物の色素やタバコが原因の着色汚れである。ステインのような着色汚れがあると、歯の美観を損ねてしまい、周囲の人々にも不潔感を与えてコミュニケーションの妨げになることもあり、さらにステインをそのまま放置しておくと歯が変色してしまうなどの問題が生じる。食生活の多様化とともにこうした嗜好品の愛用は広まる一方であり、ステインに悩む人々も増加し、ステイン除去効果の高い歯ブラシが求められていた。
ところが、通常の歯ブラシによるブラッシングではステイン除去が難しい。ステイン除去には毛腰の硬い歯ブラシが有効であるが、全ての毛束の毛腰が硬いと、歯面・歯頸部・歯間部など細部の歯垢除去が困難である。逆に、細部の歯垢除去力を重視して、毛先進入性を高める工夫がなされた従来の歯ブラシでは、ステイン除去が困難であった。
本発明は、上記事情に鑑みてなされたものであり、歯面・歯頸部・歯間部など細部の歯垢を効率よく刷掃できると同時に、特に色素着色汚れであるステインを除去するのに効果的な歯ブラシを提供することを目的とする。 All of the above-mentioned toothbrushes are excellent in removing plaque from food residues and bacteria adhering to the tooth surface, but no mention of stain removal has been made.
Stain is stains caused by pigments and tobacco of strong foods and drinks such as tea, coffee / tea, and red wine. Stain-like stains can damage the aesthetics of the teeth, can create a sense of filth in the surrounding people and hinder communication, and if you leave stains as they are, the teeth change color. Problems occur. With the diversification of eating habits, the use of these luxury products is becoming more widespread, the number of people who suffer from stains has increased, and toothbrushes with a high stain removal effect have been demanded.
However, it is difficult to remove stains by brushing with a normal toothbrush. A toothbrush with a hard bristle is effective for stain removal, but if the fur of all the hair bundles is hard, it is difficult to remove fine plaque such as the tooth surface, the neck, and the interdental part. On the other hand, it is difficult to remove stains with a conventional toothbrush that has been devised to increase the hair tip penetration by emphasizing fine plaque removal power.
The present invention has been made in view of the above circumstances, and can efficiently remove fine plaque such as a tooth surface, a neck portion, and an interdental portion, and at the same time, remove stains that are particularly pigmented stains. An object of the present invention is to provide an effective toothbrush.

上記課題を解決するために、本発明によれば、植毛面に複数の植毛穴が設けられたヘッド部を備え、この植毛面の各植毛穴に刷毛の毛束が植毛されてなる歯ブラシであって、前記ヘッド部の長手方向に沿って中央に、内径が２．０〜２．８ｍｍの範囲からなる植毛穴に植設された刷毛の毛束列を少なくとも１列配設し、前記中央毛束列の両外側に、前記中央毛束列の植毛穴よりも小さく、内径が１．２〜１．６ｍｍの範囲からなる植毛穴に植設された刷毛の毛束列を少なくとも１列ずつ配設し、前記中央植毛穴の総面積と前記両外側植毛穴の総面積の比率が１：０．６〜１：２．８の範囲であることを特徴とする歯ブラシが提供される。
これにより、中央毛束列の毛束は強い毛腰を有し、歯の表面の歯垢やステインを効率よく刷掃することができ、且つ、両外側毛束列が歯を包み込むようにしなることで、歯間や歯と歯茎の境目などの細かい部分を効果的に刷掃することができ、歯垢除去力とステイン除去力を同時に兼ね備えることができる。 In order to solve the above-described problems, according to the present invention, there is provided a toothbrush comprising a head portion provided with a plurality of flocked holes on a flocked surface, and a bristles of brushes are flocked into the flocked holes of the flocked surface. And at least one row of bristles of brushes planted in a flocking hole having an inner diameter of 2.0 to 2.8 mm in the center along the longitudinal direction of the head portion. On both outer sides of the bundle row, at least one row of brush bundle rows arranged in a flock hole having an inner diameter of 1.2 to 1.6 mm which is smaller than the flock holes of the central bristle row is arranged. And a toothbrush characterized in that the ratio of the total area of the central flock hole to the total area of the outer flock holes is in the range of 1: 0.6 to 1: 2.8.
As a result, the bristles in the central bristle row have a strong bristle, can effectively wipe out plaque and stains on the surface of the teeth, and both outer side bunches wrap around the teeth. Thus, it is possible to effectively wipe out fine portions such as between teeth and the boundary between teeth and gums, and simultaneously have plaque removing power and stain removing power.

また、本発明の歯ブラシにおいて、前記中央毛束列の毛丈が、前記両外側毛束列の毛丈よりも低くなっていて、その高低段差が最大０．５〜２．０ｍｍの範囲であることを特徴とすることができる。
このように、毛丈段差を設けることで、内側の毛束が歯面を磨くとき、外側の毛束が適度に撓み、歯間部・歯頸部をさらに効率よく清掃することが可能となる。 Moreover, in the toothbrush of this invention, the bristle length of the said center bristle bundle row | line is lower than the bristle length of the said both outer side bristle row | line | column, The height step is the range of 0.5-2.0 mm at the maximum. Can be characterized.
In this way, by providing a bristle height step, when the inner hair bundle polishes the tooth surface, the outer hair bundle bends moderately, and it becomes possible to more efficiently clean the interdental part and the cervical part. .

さらに、本発明の歯ブラシにおいて、前記中央毛束列の刷毛、および前記両外側毛束列の刷毛において、断面に溝部を有する形状の刷毛を用いていることを特徴とすることができる。
このように、溝部を有する用毛を用いることにより、研磨剤保持力が向上し、より効果的にステイン除去を行うことが可能となる。 Furthermore, in the toothbrush of the present invention, the brush of the central bristle bundle row and the brush of the both outer bristle row row may use a brush having a shape having a groove in the cross section.
As described above, by using the hair having the groove, the holding power of the abrasive is improved, and the stain can be removed more effectively.

本発明の歯ブラシによれば、歯面・歯頸部・歯間部の歯垢を効率よく刷掃できると同時に、特に色素着色汚れであるステインを除去するのに効果的な歯ブラシが実現できる。 According to the toothbrush of the present invention, it is possible to efficiently clean the dental plaque on the tooth surface, the neck portion, and the interdental portion, and at the same time, it is possible to realize a toothbrush that is particularly effective for removing stains that are pigmented stains.

以下、本発明の歯ブラシの実施形態について、図面を参照して説明する。なお、本発明は、以下に説明する実施の形態に限定されない。
図１は、本発明の第1の実施形態である歯ブラシにおけるヘッド部１の平面説明図であり、図２は図１に示すヘッド部１のＡ−Ａ‘線断面図である。 Hereinafter, embodiments of the toothbrush of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below.
FIG. 1 is an explanatory plan view of the head portion 1 of the toothbrush according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA ′ of the head portion 1 shown in FIG.

本発明の歯ブラシは、ヘッド部１と、首部２を介してヘッド部１と連結されたハンドル部（図示せず）を備えている。ヘッド部１は、口腔内を清掃しやすい形状で、厚みが例えば２〜６ｍｍ程度に形成されればよく、ハンドル部は把持しやすい形状に形成されていればよい。
ヘッド部１やハンドル部は、例えば硬質樹脂による一体成形により形成されるのが一般的であるが、ハンドル部には、さらにエラストマーなどの柔軟な樹脂を部分的にあるいは全体に形成し、把持性を向上させてもよいし、携帯用にハンドル部が折りたたみできる構造になっていてもよい。
また、電動歯ブラシなどのように、ヘッド部１とハンドル部が分断された組み立て式になっていてもよいし、ヘッド部１はハンドル部が付属していない交換用ヘッドとしても用いることができる。 The toothbrush of the present invention includes a head portion 1 and a handle portion (not shown) connected to the head portion 1 via a neck portion 2. The head unit 1 may be formed in a shape that allows easy cleaning of the oral cavity, and may be formed to have a thickness of, for example, about 2 to 6 mm, and the handle unit may be formed in a shape that is easy to grip.
The head portion 1 and the handle portion are generally formed by, for example, integral molding using a hard resin. However, the handle portion is further formed with a flexible resin such as an elastomer partially or entirely so as to be gripped. The handle portion may be folded so as to be portable.
Moreover, the head part 1 and the handle | steering-wheel part may be assembled like an electric toothbrush etc., and the head part 1 can be used also as a replacement head which is not attached to a handle | steering-wheel part.

ヘッド部１やハンドル部の形成素材は、特に限定されないが、具体的に例示すれば、熱可塑性樹脂として、曲げ弾性率５００〜３０００ＭＰａ（ＪＩＳＫ７２０３またはＫ７１７１準拠）のものが好ましく、ポリオレフィン（ポリプロピレン、ポリエチレンなど）、ポリエステル（ポリエチレンテレフタレート、ＰＢＴ、ＰＴＴなど）、ポリカーボネート（ポリエステルとのブレンドを含む）、ポリアリレート（ポリエステルとのブレンドを含む）、ポリオキシメチレン樹脂、ＡＳ樹脂、ＡＢＳ樹脂、セルロースプロピオネート、ポリアミド（ナイロン）、ポリウレタン、ＰＭＭＡ樹脂などの材料を用いることができるが、価格や加工性の点からポリプロピレンが好ましい。 The material for forming the head part 1 and the handle part is not particularly limited, but specifically, as a thermoplastic resin, a material having a flexural modulus of 500 to 3000 MPa (based on JIS K7203 or K7171) is preferable, and polyolefin (polypropylene, Polyethylene), polyester (polyethylene terephthalate, PBT, PTT, etc.), polycarbonate (including blend with polyester), polyarylate (including blend with polyester), polyoxymethylene resin, AS resin, ABS resin, cellulose propio Nate, polyamide (nylon), polyurethane, PMMA resin and the like can be used, but polypropylene is preferable from the viewpoint of price and workability.

また、透明性を重視する場合には、例えば、米国イーストマン社ポリエステルの一種であるＰＣＴＡ樹脂がコストや耐歯磨剤性の点から好ましい。また、これらの樹脂同士や熱可塑性エラストマー（オレフィン系、スチレン系、ポリエステル系、ウレタン系、ナイロン系など）、シリコン樹脂などと組み合わせ、ハンドル部やヘッド部に色の変化を持たせた多色成形ハンドルとすることも好ましい。 Moreover, when importance is attached to transparency, for example, a PCTA resin which is a kind of polyester of Eastman Corporation in the United States is preferable from the viewpoint of cost and dentifrice resistance. In addition, multi-color molding that combines these resins, thermoplastic elastomers (olefin, styrene, polyester, urethane, nylon, etc.), silicone resin, etc., and gives the handle part and head part a color change. A handle is also preferred.

ヘッド部１の植毛面３には、ヘッド部の長手方向に沿って中央に大径植毛穴４が少なくとも1列穿設され、その両外側には大径植毛穴４よりも小さい小径植毛穴５が少なくとも1列ずつ穿設される。大径植毛穴４には中央列毛束６が、小径植毛穴５には両外側列毛束７が、それぞれの穴の大きさに合わせて微細な刷毛を多数束ねて植設される。 The flocked surface 3 of the head part 1 has at least one row of large diameter flocked holes 4 formed in the center along the longitudinal direction of the head part, and a small diameter flocked hole 5 smaller than the large diameter flocked hole 4 on both outer sides. Are drilled in at least one row. A central row hair bundle 6 is planted in the large-diameter flock hole 4, and both outer side row hair bundles 7 are planted in a small-diameter flock hole 5 by bundling a large number of fine brushes according to the size of each hole.

植毛穴の内径は、一般に、植毛される刷毛の本数と相関があるので、毛束の硬さや使用感に影響するが、植毛する際に用いる刷毛径や歯ブラシの状態での各毛束の刷毛長（植毛面から刷毛先端までの距離）によって使用感はある程度調整可能ではある。
大径植毛穴４の内径は、２．０〜２．８ｍｍの範囲であって、２．３〜２．５ｍｍの範囲が好ましい。２．０ｍｍ未満であると、中央列毛束6の毛腰の強さが十分得られず、２．８ｍｍを超えると中央列毛束６の毛腰が強くなりすぎて清掃しにくくなる。
小径植毛穴５の内径は、大径植毛穴４の内径よりも小さく、１．２〜１．６ｍｍの範囲であって、１．３〜１．４ｍｍの範囲が好ましい。１．２ｍｍ未満であると、両外側列毛束７の毛腰が弱くなりすぎて、毛先が開きやすく耐久性に問題が生じ、１．６ｍｍを超えると、両外側列毛束７がしなりにくく歯間に毛先が入りにくくなる。
大径植毛穴４の間隔は、０．３〜０．７ｍｍの範囲が好ましく、小径植毛穴５の間隔は０．７〜２．３ｍｍの範囲であって、より好ましくは０．９〜１．５ｍｍの範囲である。
大径植毛穴４の間隔を前記の範囲とすることで、中央列毛束６を連続した毛束群として感じることができ、程良い歯面の刷掃実感を得ることができる。
小径植毛穴５に前記範囲のように適度な毛束間隔を設けることで、外側列毛束７が撓んで自由に動くことができ、心地よい刷掃感を感じることができる。 The inner diameter of the flocked hole generally correlates with the number of brushes to be implanted, which affects the hardness and feeling of use of the bristles, but the brush diameter used at the time of flocking and the bristles in the state of the toothbrush The feeling of use can be adjusted to some extent by the length (distance from the flocked surface to the tip of the brush).
The inner diameter of the large-diameter flock hole 4 is in the range of 2.0 to 2.8 mm, and preferably in the range of 2.3 to 2.5 mm. When the width is less than 2.0 mm, the fur strength of the center row hair bundle 6 is not sufficiently obtained, and when it exceeds 2.8 mm, the fur of the center row hair bundle 6 becomes too strong and it becomes difficult to clean.
The inner diameter of the small diameter flocking hole 5 is smaller than the inner diameter of the large diameter flocking hole 4 and is in the range of 1.2 to 1.6 mm, preferably in the range of 1.3 to 1.4 mm. If it is less than 1.2 mm, the fur of the outer side row hair bundles 7 becomes too weak, and the ends of the hair easily open, resulting in a problem in durability. It is hard to become, and it becomes hard to get a hair tip between teeth.
The interval between the large-diameter flock holes 4 is preferably in the range of 0.3 to 0.7 mm, and the interval between the small-diameter flock holes 5 is in the range of 0.7 to 2.3 mm, and more preferably 0.9 to 1. The range is 5 mm.
By setting the interval between the large-diameter flock holes 4 within the above range, the central row of hair bundles 6 can be felt as a continuous hair bundle group, and a good feeling of brushing of the tooth surface can be obtained.
By providing an appropriate bristle spacing in the small-diameter flocking hole 5 as described above, the outer row bristle bundle 7 can bend and move freely, and a comfortable brushing feeling can be felt.

毛束の配列は、通常は円形断面の毛束として格子状や千鳥状に配列され、毛束の断面形状の組み合わせや配列の組み合わせを目的に応じて適宜選択することができる。
大径植毛穴４に植設される中央毛束列は、１列であっても複数列であってもよく、小径植毛穴５に植設される両外側毛束列も１列であっても、複数列であってもよい。
好ましくは、中央の大径植毛穴４の毛束列が１列で、外側の小径植毛穴５の毛束は、植毛面３の先端部が１列であって、中央部や後端部は２列ずつになるよう、ヘッド部１の形状に合わせて配設されるとよい。このような配設にすればヘッドの先端がスリムな形となり、口の奥側まで歯ブラシを挿入し易く、口腔内での操作性が向上する。 The arrangement of the hair bundles is usually arranged in a lattice shape or a zigzag shape as a hair bundle having a circular cross section, and a combination of cross-sectional shapes of hair bundles or a combination of arrangements can be appropriately selected according to the purpose.
The central hair bundle row to be planted in the large-diameter flock hole 4 may be one row or a plurality of rows, and both outer side hair bundle rows to be planted in the small-diameter flock hole 5 are also one row. Alternatively, a plurality of rows may be used.
Preferably, the hair bundle row of the central large-diameter flock hole 4 is one row, and the hair bundle of the outer small-diameter flock hole 5 is one row at the front end portion of the flocked surface 3, and the central portion and the rear end portion are It may be arranged in accordance with the shape of the head portion 1 so that two rows are provided. With such an arrangement, the tip of the head has a slim shape, the toothbrush can be easily inserted to the back of the mouth, and operability in the oral cavity is improved.

植毛面３において、毛束の植毛されている領域の全体植毛面積（ＪＩＳＳ３０１６：植毛面積）は、子供用では小さく、大人用では大きくなるが、一般的には０．５ｃｍ^２程度から３ｃｍ^２程度とされている。また、ヘッド部１の大きさについても、一般的には毛束が植毛されている領域（植毛面積）の周囲に、縁幅０．５〜１ｍｍ程度を加えた大きさとされている。
本発明の歯ブラシにおいて、大径植毛穴４の総面積と小径植毛穴５の総面積の比率は、１：０．６〜１：２．８の範囲であって、より好ましくは１：１〜１：２．２の範囲である。
大径植毛穴４の総面積と小径植毛穴５の総面積の比率は、中央列毛束６と外側列毛束７の口腔内での強度バランスを示すものであり、１：０．６未満では歯面の刷掃実感に対し、歯と歯の間や歯と歯茎の境目などの細かい部分の刷掃実感が不足し、口腔内で違和感を生じる。１：２．８を超えると外側列毛束群の刷掃力が強くなりすぎてしまい、歯面の刷掃実感が充分に得られない場合がある。 The total hair transplantation area (JIS S 3016: flocking area) of the region where the hair bundles are implanted on the flocked surface 3 is small for children and large for adults, but is generally about 0.5 cm ² to 3 cm. It is supposed to be about ² . In addition, the size of the head portion 1 is generally set to a size obtained by adding an edge width of about 0.5 to 1 mm around the region where the hair bundle is implanted (planted area).
In the toothbrush of the present invention, the ratio of the total area of the large-diameter flock holes 4 to the total area of the small-diameter flock holes 5 is in the range of 1: 0.6 to 1: 2.8, more preferably 1: 1 to 1. The range is 1: 2.2.
The ratio of the total area of the large-diameter flock holes 4 to the total area of the small-diameter flock holes 5 indicates the strength balance in the oral cavity between the central row bristles 6 and the outer row bristles 7, and is less than 1: 0.6 However, in contrast to the feeling of brushing of the tooth surface, the feeling of brushing of fine parts such as between the teeth and the boundary between the teeth and gums is insufficient, and the mouth feels uncomfortable. If it exceeds 1: 2.8, the brushing force of the outer row of hair bundles becomes too strong, and there may be a case where the tooth surface is not fully brushed.

ヘッド部１の植毛面３から鉛直方向に刷毛先端までの距離としての毛丈は、毛束仕様や刷毛仕様によって使用感、清掃効果などを考慮して適宜選択されるが、一般には、大人用として８〜１２ｍｍ、子供用として６〜１０ｍｍが好ましいとされる。
毛先進入性向上のために、中央列毛束６は、両外側列毛束７よりも毛丈が低くなっていることが好ましい。その毛丈差の最大値は、０．５〜２．０ｍｍの範囲であるとよく、より好ましくは１．０〜１．５ｍｍの範囲である。
前記構成になる歯ブラシを用いた場合、毛先先端が歯面に当たったときに、刷毛長の長い外側列毛束が自然に開き、毛先が歯頸部にフィットする。このため、歯ブラシを歯頸部に当てる角度を気にすることなく、簡単な操作で歯頸部の刷掃効果を向上することができる。これにより、歯面の清掃性と歯茎への当たり心地のより優れた歯ブラシを得ることができる。中央と外側の毛束の毛丈差を２．０ｍｍより大きくすると、中央列毛束で歯面を磨こうとすると、外側列毛束が必要以上の力で歯頸部に当たってしまい、歯肉への当たり心地が悪い場合もある。 The hair length as the distance from the flocked surface 3 of the head portion 1 to the brush tip in the vertical direction is appropriately selected depending on the hair bundle specifications and the brush specifications in consideration of the feeling of use, the cleaning effect, etc. 8 to 12 mm for children and 6 to 10 mm for children.
In order to improve the hair tip penetration property, it is preferable that the center row hair bundle 6 has a lower hair length than both outer side row hair bundles 7. The maximum value of the hair height difference is preferably in the range of 0.5 to 2.0 mm, more preferably in the range of 1.0 to 1.5 mm.
When the toothbrush having the above-described configuration is used, when the tip of the bristles hits the tooth surface, the outer row hair bundle having a long brush length naturally opens and the bristles fit into the tooth neck. For this reason, the brushing effect of the tooth neck can be improved with a simple operation without worrying about the angle at which the toothbrush is applied to the tooth neck. Thereby, the toothbrush more excellent in the cleaning property of a tooth surface, and the contact | feeling feeling to a gum can be obtained. If the difference in hair length between the central and outer hair bundles is larger than 2.0 mm, when trying to polish the tooth surface with the central row hair bundle, the outer row hair bundle hits the cervical region with more force than necessary, There is a case where the hit feeling is bad.

中央列毛束６や両外側列毛束７の毛切り形状については、一般的には平面状の平切り、頂部のある山切り、平面状高さの複数ある断切りなど適宜選択されればよいが、例えば、図３の（ａ）に示すように、中央列毛束６と両外側列毛束７が高低段差△ｈの全平切りにしてもよい。（ｂ）に示すように、中央列毛束６を平切りにし、両外側列毛束７を高低段差△ｈの傾斜切りにしてもよい。（ｃ）に示すように、中央列毛束６を平切りにし、両外側列毛束７を１束で1山の高低段差△ｈの山切りにしてもよい。（ｄ）に示すように、中央列毛束６を平切りにして、両外側列毛束７を２束で１山の高低段差△ｈの山切りにしてもよい。
毛切り方法は、カッター形状の工夫や複数回の毛切り工程や毛分け装置の使用などにより、様々な形状の組み合わせとすることもでき、通常はそれぞれの毛先部分が毛先丸め処理されている。また、テーパー毛で毛切り工程を経ない場合もあり、その場合には毛先丸め処理を行わなくてもよい。 About the hair cutting shape of the center row hair bundle 6 and the both outer side row hair bundles 7, generally, a flat flat cut, a crest with a top, a plurality of cuts with a flat height, and the like can be selected as appropriate. However, for example, as shown in FIG. 3A, the central row hair bundle 6 and both outer row hair bundles 7 may be all flatly cut with a height difference Δh. As shown in (b), the central row hair bundle 6 may be cut into two pieces, and both outer row hair bundles 7 may be made into inclined pieces with a height difference Δh. As shown in (c), the central row hair bundle 6 may be cut into two pieces, and both outer row hair bundles 7 may be made into one piece with a height difference Δh of one mountain. As shown in (d), the central row of hair bundles 6 may be cut into two pieces, and the outer row of hair bundles 7 may be made into two pieces of one height and a height difference Δh.
The hair-cutting method can be combined with various shapes, such as by cutting the shape of the cutter, using multiple hair-cutting processes, or using a hair-separation device. Normally, the tip ends are rounded off. Yes. Moreover, it may not go through a hair cutting process with a taper hair, In that case, it is not necessary to perform a hair-end rounding process.

中央列毛束６や両外側列毛束７を構成する刷毛は、歯ブラシとして用いることが可能であれば特に限定されることはなく、従来用いられているナイロンやポリブチレンテレフタレート（ＰＢＴ）、ポリトリメチレンテレフタレート（ＰＴＴ）などを用いることができる。
刷毛断面を多層構造とするには、通常使用されているポリアミド（ナイロン６−１２、ナイロン６−１０、１２ナイロンなど）、ポリエステル（ポリエチレンテレフタレート、ＰＢＴ、ＰＴＴなど）、ポリプロピレンなどの硬質樹脂や熱可塑性エラストマーのような軟質樹脂を用い、同一素材あるいは互いに組み合わせた複合フィラメントとしてもよい。 The brushes constituting the central row bristles 6 and the outer row bristles 7 are not particularly limited as long as they can be used as toothbrushes, and conventionally used nylon, polybutylene terephthalate (PBT), poly Trimethylene terephthalate (PTT) or the like can be used.
In order to make the brush cross section into a multi-layer structure, hard resins such as polyamide (nylon 6-12, nylon 6-10, 12 nylon, etc.), polyester (polyethylene terephthalate, PBT, PTT, etc.), polypropylene, etc. or heat A soft resin such as a plastic elastomer may be used, and the same material or composite filaments combined with each other may be used.

刷毛樹脂の着色については、透明（ナチュラル）のまま用いてもよく、また顔料や染料による透明系着色刷毛あるいは、不透明着色（白を含む）刷毛などが歯ブラシの外観の商品性を考慮して適宜選択される。必要に応じて、それらを２種あるいはそれ以上を、毛束単位や毛束内で組み合わせて使用してもよく、また、同一刷毛の断面を多重芯鞘構造とする場合には、部分的に異なる素材や着色のものと組み合わせて用いることもできる。 Regarding the coloring of the brush resin, it may be used transparent (natural) as it is, and transparent colored brushes with pigments or dyes or opaque colored (including white) brushes are appropriately used in consideration of the commercial properties of the toothbrush appearance. Selected. If necessary, two or more of them may be used in combination in the hair bundle unit or in the hair bundle, and when the cross section of the same brush has a multi-core sheath structure, partially It can also be used in combination with different materials or colored ones.

また、刷毛の特性を損なわない範囲内で、熱や光に対する安定化剤、難燃剤、フィラー、表面潤滑剤、帯電防止剤、殺菌素材（抗菌素材）など、さらには、他の硬質樹脂やエラストマーを適宜配合したり塗布したりしてもよい。刷毛の太さは、使用感、清掃機能や耐久性の点から、３〜１２ｍｉｌ（１ｍｉｌ＝１/１０００ｉｎｃｈ、０．０７〜０．３１ｍｍ）が好ましく、より好ましくは５〜１１ｍｉｌ（０．１２〜０．２８ｍｍ）である。刷毛先端が細くなった高度テーパー毛（テーパー部の先端径１０〜８０μｍ程度）の場合、テーパーの施されていない植毛側の刷毛径を０．１２〜０．３０ｍｍとするのが好ましい。 Within the range that does not impair the characteristics of the brush, heat and light stabilizers, flame retardants, fillers, surface lubricants, antistatic agents, antiseptic materials (antibacterial materials), and other hard resins and elastomers May be appropriately blended or applied. The thickness of the brush is preferably 3 to 12 mil (1 mil = 1/1000 inch, 0.07 to 0.31 mm), more preferably 5 to 11 mil (0.12 to 0.12) from the viewpoint of usability, cleaning function and durability. 0.28 mm). In the case of highly-tapered hair having a thin brush tip (taper tip diameter of about 10 to 80 μm), it is preferable that the brush diameter on the side of flocking not tapered is 0.12 to 0.30 mm.

刷毛の断面形状は、断面に溝部を有する形状が好ましく、例えば、星形、三つ葉や四つ葉のクローバー形などの断面形状が挙げられる。このように、断面に溝部を有する刷毛を用いることで、研磨剤保持力がさらに向上し、ステイン除去効果が高まる。
通常の円形状であってもよいし、楕円形など略円形状であってもよい。また、三角形、四角形、五角形、六角形などや不均一な辺長さのものも含めた様々な多角形であってもよいし、直線や曲線の様々な組み合わせ形状であってもよく、必要に応じて任意の形状が選択される。 The cross-sectional shape of the brush is preferably a shape having a groove in the cross-section, and examples include cross-sectional shapes such as a star shape, a trilobal shape, and a four-leaf clover shape. Thus, by using a brush having a groove in the cross section, the abrasive retention is further improved and the stain removal effect is enhanced.
A normal circular shape may be sufficient, and substantially circular shapes, such as an ellipse, may be sufficient. Also, it may be various polygons including triangles, quadrangles, pentagons, hexagons, etc., and non-uniform side lengths, and may be various combinations of straight lines and curves. An arbitrary shape is selected accordingly.

刷毛は毛先丸め部を除いて１本の刷毛内では同一径であるが、刷毛の長軸方向へ向けてあるピッチで捻られていてもよいし、ウェーブ処理、クリンプ処理を加えるなどしてもよく、毛束の根元付近では前記した刷毛太さであって、刷毛先端へ向かうに従って徐々に径が細くなる高度テーパー毛の形態（例えば、先端部分の径が０．０１〜０．０８ｍｍ）であってもよい。また、刷毛部の先端形状を加工により、ヘラ状、スクレイパー状、球状などとしてもよい。 The brush has the same diameter in one brush except for the rounded ends, but may be twisted at a certain pitch toward the long axis direction of the brush, or may be subjected to wave processing or crimp processing. In the vicinity of the root of the hair bundle, the thickness of the brush is as described above, and the form of highly tapered hair whose diameter gradually decreases toward the brush tip (for example, the tip portion has a diameter of 0.01 to 0.08 mm). It may be. Further, the tip shape of the brush portion may be processed into a spatula shape, a scraper shape, a spherical shape, or the like.

中央列毛束６や両外側列毛束７をヘッド部１の植毛面３に植設する方法としては、従来技術の方法でヘッド部１に固定することができ、例えば平線（真鍮、ステンレス、硬質樹脂、などの抜け止め部材）で毛束を２つ折りにして植毛する平線植毛、毛束の一端を熱などの手段により結合し、結合部が金型内にある状態でヘッド部１に樹脂を充填し固定するインモールド植毛（例えば、特開昭６１−２６８２０８、特表平９−５１２７２４などを参照）、毛束の一端とヘッド部１を熱などの手段で溶融結合する熱融着植毛（例えば、特開昭６０−２４１４０４を参照）などで行うことができる。 As a method of planting the center row hair bundle 6 and both outer side row hair bundles 7 on the flocking surface 3 of the head portion 1, it can be fixed to the head portion 1 by a conventional method, for example, a flat wire (brass, stainless steel). Flat wire flocking in which the hair bundle is folded in two with a retaining member such as hard resin), one end of the hair bundle is joined by means such as heat, and the head portion 1 is in a state where the joint is in the mold. In-mold flocking (for example, see JP-A-61-268208, JP-A-9-512724, etc.), and one end of the hair bundle and the head portion 1 are melt-bonded by means such as heat. It can be carried out by dressing (for example, see JP-A-60-241404).

刷毛を歯ブラシのヘッド部１に固定する場合、パッキングファクターが６０〜１００％となるようにすると毛立ちが良く外観に優れ、毛の開き耐久性に優れ、毛先を効率的に使用でき、刷掃効果の高い歯ブラシとすることができる。
ここで、パッキングファクターとは、あらかじめヘッド部１の植毛面３に形成された小径植毛穴４、大径植毛穴５に刷毛を平線で固定する方法、もしくは、熱融着方式の場合、固定される１本〜複数本の刷毛の断面積の総和を、植毛穴断面積で除した値を１００倍して百分率（％）で表したものである。
ただし、平線を用いる場合は、植毛穴断面積から、平線の植毛穴内にある部分の植毛穴断面方向から見た面積を除いた値を用いて除する。また、インモールド方式の場合や、熱融着方式などでも、あらかじめヘッド部の植毛穴が無い場合には、植毛穴断面積の代わりに、ヘッド部１に固定する際に毛束を保持するための固定具の穴断面積を用いて除する。 When fixing the brush to the head part 1 of the toothbrush, if the packing factor is set to 60 to 100%, the fuzz is good and the appearance is excellent, the opening durability of the hair is excellent, and the tip can be used efficiently. A toothbrush with a high sweeping effect can be obtained.
Here, the packing factor is fixed in the case of a method of fixing the brush with a flat wire in the small-diameter flock hole 4 or the large-diameter flock hole 5 previously formed on the flocking surface 3 of the head portion 1 or in the case of the heat fusion method. The sum of the cross-sectional areas of one to a plurality of brushes divided by the flock hole cross-sectional area is multiplied by 100 and expressed as a percentage (%).
However, when a flat wire is used, it is divided from the cross-sectional area of the flocked hole using a value obtained by removing the area viewed from the cross-sectional direction of the flocked hole in the flat flocked hole. Also, in the case of the in-mold method or the heat fusion method, when there is no flock hole in the head portion in advance, the hair bundle is held when fixing to the head portion 1 instead of the flock hole cross-sectional area. Divide by using the hole cross-sectional area of the fixture.

植毛される毛束または刷毛の角度は、必ずしもヘッド部１の植毛面３に対して鉛直方向でなくてもよく、例えば特定の方向のかき取り効果を高める目的で、毛束が植毛されているヘッド部１の植毛面３に対して１５°ないし２０°程度まで傾斜して植毛されることもある。
毛束の断面形状は、通常は円形であるが、必ずしも円形である必要はなく、植毛配列の設計に合わせて、三角形、四角形などの多角形や、直線および曲線を任意に組み合わせた不定形としてもよい。また、特に平線植毛の場合においては、これら不定形の毛束と薄壁穴間植毛を組み合わせて、直線状あるいは曲線状の見かけ上連続した毛束群とすることもできる。 The angle of the hair bundle or brush to be planted may not necessarily be perpendicular to the planted surface 3 of the head unit 1. For example, the hair bundle is implanted for the purpose of enhancing the scraping effect in a specific direction. In some cases, the hair is implanted with an inclination of about 15 ° to 20 ° with respect to the flocked surface 3 of the head portion 1.
The cross-sectional shape of the hair bundle is usually circular, but it does not necessarily have to be circular, and it can be a polygonal shape such as a triangle or a quadrilateral, or an indeterminate shape that is an arbitrary combination of straight lines and curves according to the design of the flocking arrangement Also good. In particular, in the case of flat line flocking, these bundles of irregular shapes and thin wall hole flocking can be combined to form a linear or curved apparently continuous hair bundle group.

以下に実施例により本発明を更に詳細に説明するが、本発明は下記実施例に何ら限定されるものではない。
「実施例１〜５、比較例１〜６」
表１および表２に示す植毛穴径、植毛穴総面積比、毛切り形状、用毛断面形状からなるように、実施例１〜５および比較例１〜６の歯ブラシを作製した。 EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples.
"Examples 1-5, Comparative Examples 1-6"
The toothbrushes of Examples 1 to 5 and Comparative Examples 1 to 6 were prepared so as to have the flocked hole diameter, flocked hole total area ratio, hair cutting shape, and hair cross-sectional shape shown in Table 1 and Table 2.

このようにして得られた実施例１〜５および比較例１〜６の歯ブラシに対し、「ステイン除去力」および「歯間進入性（歯垢除去力）」の試験を実施し、以下に示すように評価した。
「使用感評価」については、被験者にアンケートを行い、以下に示すように評価した。
以上の結果は、同じく表１および表２に示す。 For the toothbrushes of Examples 1 to 5 and Comparative Examples 1 to 6 thus obtained, tests for “stain removal force” and “interproximal penetration (plaque removal force)” were carried out, and are shown below. It was evaluated as follows.
For the “use feeling evaluation”, a questionnaire was given to the subjects, and the evaluation was performed as shown below.
The above results are also shown in Tables 1 and 2.

「ステイン除去力」
ステイン除去力を調べるために、以下の方法で試験を行った。
直径７ｍｍの円形アパタイト板に、充分に黒くて強固なステインを付着させた。基台の上にモデルステインを付着させたアパタイト板を固定し、ブラッシングを行った。
ステイン除去力は、色の数値△ＥをLab系を用いた色差計により測定し、算出した。
算出値から、以下の３段階評価によって判定した。
○・・・ステイン除去率が６５％以上。
△・・・ステイン除去率が６０％以上６５％未満を△。
×・・・ステイン除去率が６０％未満。 "Stain removal power"
In order to examine the stain removing power, the test was conducted by the following method.
Sufficiently black and strong stain was adhered to a circular apatite plate having a diameter of 7 mm. An apatite plate with model stain attached was fixed on the base and brushed.
The stain removal power was calculated by measuring the numerical value ΔE of the color with a color difference meter using a Lab system.
It was determined from the calculated value by the following three-stage evaluation.
○: Stain removal rate is 65% or more.
Δ: Stain removal rate of 60% or more and less than 65%.
X: Stain removal rate is less than 60%.

「歯間進入性」
歯垢除去力を調べるために、歯間進入性を以下のように測定した。
まず、歯間部を模したモデルを作成し、そのモデルに対してブラッシングを行った。
歯間進入性の評価は、測定値から以下の３段階評価によって判定した。
○・・・歯間進入性が６．５ｍｍ以上。
△・・・歯間進入性が６ｍｍ以上６．５ｍｍ未満。
×・・・歯間進入性が６ｍｍ未満。 Interdental penetration
In order to examine plaque removal power, interdental penetration was measured as follows.
First, a model imitating the interdental part was created, and brushing was performed on the model.
Evaluation of interdental penetration was determined from the measured values by the following three-stage evaluation.
○: Interdental penetration is 6.5 mm or more.
Δ: Interdental penetration is 6 mm or more and less than 6.5 mm.
X: Interdental penetration is less than 6 mm.

「使用感評価」
被験者３名に歯磨き時の使用感についてアンケートを行い、以下の３段階評価によって評価した。
○・・・歯面及び歯間部・歯頸部の刷掃実感のバランスが良い。
△・・・歯面及び歯間部・歯頸部の刷掃実感のバランスがあまり良くない。
×・・・歯面及び歯間部・歯頸部の刷掃実感のバランスが悪い。 “Usage Evaluation”
A questionnaire was given to the three subjects about the feeling of use when brushing their teeth, and the following three-step evaluation was performed.
○ ・・・ Good balance of tooth surface, interdental area and tooth neck area.
Δ: The balance of the brushing feeling of the tooth surface, the interdental part and the tooth neck part is not so good.
X: The balance of the brushing feeling of the tooth surface, interdental part and tooth neck part is poor.

＜総合評価＞
表１によれば、本発明に係る実施例１、２の歯ブラシは、「ステイン除去力」、「歯間進入性」のいずれについても高い評価が得られることが判明する。
実施例３も「ステイン除去力」および「歯間進入性」に問題は無い。
実施例４に示すように、中央列毛束６を平切りにし、両外側列毛束７を1束1山の山切り形状にし、その他の仕様を実施例１と同じ歯ブラシにすると、両外側列毛束７が適度に撓み、実施例１よりも歯間部への毛先進入性がさらに向上する。
実施例５に示すように、刷毛の断面形状を星型にし、その他の仕様を実施例４と同じにした場合、ステイン除去力は実施例４よりも向上する。 <Comprehensive evaluation>
According to Table 1, it is found that the toothbrushes of Examples 1 and 2 according to the present invention can obtain high evaluations for both “stain removal power” and “interproximal penetration”.
In Example 3, there is no problem in “stain removal power” and “interproximal penetration”.
As shown in Example 4, when the central row hair bundle 6 is cut into flat pieces, both outer side row hair bundles 7 are made into a mountain shape of one bundle, and other specifications are made the same toothbrush as in Example 1, both outer sides The row hair bundle 7 is appropriately bent, and the tip penetration property into the interdental portion is further improved as compared with the first embodiment.
As shown in the fifth embodiment, when the cross-sectional shape of the brush is a star shape and the other specifications are the same as those of the fourth embodiment, the stain removal force is improved as compared with the fourth embodiment.

実施例１〜５において、大径植毛穴４の総面積と小径植毛穴５の総面積の比率は、１：０．７３〜１：２．５６であり、これによって、毛腰の強い中央列毛束６で歯の表面の歯垢やステインを効率よく刷掃し、毛腰の柔らかい両外側列毛束７で歯と歯の間や、歯と歯茎の境目などの細かい部分を効率的に刷掃することができる。
比較例１に示すように、この総面積比が１：０．６未満であると、歯と歯の間や歯と歯茎の境目などの細かい部分の刷掃実感が不足し、比較例２に示すように１：２．８を超えると外側列毛束群の刷掃力が強くなりすぎてしまい、歯面の刷掃実感が充分に得られない場合がある。 In Examples 1 to 5, the ratio of the total area of the large-diameter flock holes 4 to the total area of the small-diameter flock holes 5 is 1: 0.73 to 1: 2.56. The hair bundle 6 efficiently wipes out plaque and stains on the surface of the teeth, and the soft outer and outer side row hair bundles 7 efficiently remove the fine parts such as between the teeth and between the teeth and gums. Can be wiped out.
As shown in Comparative Example 1, if this total area ratio is less than 1: 0.6, the feeling of brushing of fine parts such as between the teeth and between the teeth and gums is insufficient. As shown in the figure, when the ratio exceeds 1: 2.8, the brushing force of the outer row of hair bundles becomes too strong, and the tooth surface may not be fully brushed.

比較例３のように、大径植毛穴４が２．０ｍｍ未満であると、「ステイン除去力」が不十分であり、比較例４のように、２．８ｍｍを越えると中央列毛束６の毛腰が強くなりすぎてしまい、「ステイン除去力」には優れるものの、歯肉への当たり心地が悪くなるという問題がある。
比較例５のように、小径植毛穴５が１．２ｍｍ未満であると、両外側列毛束７の毛腰が弱くなりすぎてしまい、毛先が開きやすく耐久性が悪くなってしまうという問題があり、比較例６のように、小径植毛穴５が１．６ｍｍを超えると、両外側列毛束７がしなりにくく、歯間に入りづらくなってしまう。 As in Comparative Example 3, if the large-diameter flock hole 4 is less than 2.0 mm, the “stain removal force” is insufficient, and if it exceeds 2.8 mm as in Comparative Example 4, the center row hair bundle 6 However, there is a problem that although it is excellent in “stain removal power”, the feeling of hitting the gingiva is deteriorated.
As in Comparative Example 5, when the small-diameter flock hole 5 is less than 1.2 mm, the hairs of the outer side row hair bundles 7 become too weak, and the end of the hair tends to open, resulting in poor durability. If the small-diameter flock hole 5 exceeds 1.6 mm as in Comparative Example 6, both outer row hair bundles 7 are difficult to bend and difficult to enter between teeth.

高低段差△ｈが、２．０ｍｍ以上と大きい場合、中央列毛束６で歯面を磨こうとすると、両外側列毛束７が必要以上の力で歯頸部に当たってしまい、歯肉への当たり心地に問題があり、逆に歯頸部に両外側列毛束７をちょうどよい力で当てると、中央列毛束６は歯牙表面に届きにくく、刷掃効率が低下するという問題がある。
一方、高低段差△ｈを逆にして、両外側列毛束７よりも中央列毛束６が高い凸状にすると、歯間部・歯頸部などの細かい部分を清掃するためには、歯頸部に当てる角度を気にしながら適切な角度を保ってブラッシングしなければならず、操作が困難になる上、「歯間進入性」が低下してしまう。 When the height difference Δh is as large as 2.0 mm or more, if you try to polish the tooth surface with the central row of hair bundles 6, both outer row of hair bundles 7 will hit the cervical region with more than necessary force and hit the gums. There is a problem in comfort, and conversely, if the outer side row hair bundles 7 are applied to the tooth neck portion with an appropriate force, the center row hair bundle 6 is difficult to reach the tooth surface, and there is a problem that the cleaning efficiency is lowered.
On the other hand, when the height difference Δh is reversed and the central row hair bundle 6 is higher than the both outer side row hair bundles 7, in order to clean fine parts such as interdental parts and tooth neck parts, The brushing must be carried out while maintaining an appropriate angle while taking care of the angle applied to the neck, which makes operation difficult and reduces interdental penetration.

以上の結果から、中央列毛束６は２．０〜２．８ｍｍの範囲からなる大径植毛穴４に植設され、両外側列毛束７は１．２〜１．６ｍｍの範囲からなる小径植毛穴５に植設され、大径植毛穴４と小径植毛穴５の総面積の比率は１：０．６〜１：２．８の範囲とすると、「ステイン除去力」と「歯間進入性」ともに優れる。
また、中央列毛束６は両外側列毛束７より低く、高低段差△ｈは０．５〜２．０ｍｍの範囲にするとより清掃効果が高まり、中央列毛束６および両外側列毛束７の刷毛において、断面に溝部を有する形状の刷毛を用いているとさらに清掃効果が高まる。 From the above results, the center row hair bundle 6 is implanted in the large-diameter flock hole 4 having a range of 2.0 to 2.8 mm, and both outer side row hair bundles 7 have a range of 1.2 to 1.6 mm. Assuming that the ratio of the total area of the large-diameter flock hole 4 and the small-diameter flock hole 5 is in the range of 1: 0.6 to 1: 2.8, Both “entrance” is excellent.
Further, when the center row hair bundle 6 is lower than the both outer row hair bundles 7 and the height difference Δh is in the range of 0.5 to 2.0 mm, the cleaning effect is further enhanced. In the brush No. 7, if a brush having a groove portion in the cross section is used, the cleaning effect is further enhanced.

図１は、本発明の歯ブラシの一例のヘッド部の平面説明図である。FIG. 1 is an explanatory plan view of a head portion of an example of the toothbrush of the present invention. 図２は、図１中のＡ−Ａ‘線断面図である。2 is a cross-sectional view taken along line A-A ′ in FIG. 1. 図３は、図１中のＢ−Ｂ‘線断面図であり、毛切り形状が（ａ）は全平切り、（ｂ）は中央毛束列が平切りで両外側毛束列が傾斜切り、（ｃ）は中央毛束列が平切りで両外側毛束列が1束で1山の山切り、（ｄ）は中央毛束列が平切りで両外側毛束列が2束で1山の山切りである。FIG. 3 is a cross-sectional view taken along the line BB ′ in FIG. 1. The hair cutting shape is (a) full flat cut, (b) is the central hair bundle flat cut, and both outer hair bundles are inclined cut. , (C) is a flat cut of the central hair bundle, one outer bundle of hair bundles and one mountain cut, (d) is a flat cut of the central bundle and two outer bundles of 1 bundle. It is a mountain cut.

符号の説明Explanation of symbols

１・・・ヘッド部、２・・・首部、３・・・植毛面、４・・・大径植毛穴、５・・・小径植毛穴、６・・・大径植毛穴４の中央列毛束、７・・・小径植毛穴５の両外側列毛束、△ｈ・・・高低段差 DESCRIPTION OF SYMBOLS 1 ... Head part, 2 ... Neck part, 3 ... Flocking surface, 4 ... Large diameter flocking hole, 5 ... Small diameter flocking hole, 6 ... Central row hair of large diameter flocking hole 4 Bundle, 7 ... Both outer side row hair bundles of small-diameter flock hole 5, Δh ... Height difference

Claims

植毛面に複数の植毛穴が設けられたヘッド部を備え、この植毛面の各植毛穴に刷毛の毛束が植毛されてなる歯ブラシであって、
前記ヘッド部の長手方向に沿って中央に、内径が２．０〜２．８ｍｍの範囲からなる植毛穴に植設された刷毛の毛束列を少なくとも１列配設し、
前記中央毛束列の両外側に、前記中央毛束列の植毛穴よりも小さく、内径が１．２〜１．６ｍｍの範囲からなる植毛穴に植設された刷毛の毛束列を少なくとも１列ずつ配設し、
前記中央植毛穴の総面積と前記両外側植毛穴の総面積の比率が１：０．６〜１：２．８の範囲であることを特徴とする歯ブラシ。 A toothbrush comprising a head portion provided with a plurality of flocked holes on the flocked surface, and a bristles of brushes planted in each flocked hole of the flocked surface,
In the center along the longitudinal direction of the head portion, at least one row of bristles of brushes planted in a flock hole having an inner diameter of 2.0 to 2.8 mm is disposed,
At least one bristle row of brushes planted in a flock hole having a diameter smaller than the flock hole of the central bunch row and having an inner diameter of 1.2 to 1.6 mm on both outer sides of the central bunch row. Arranged in rows,
The toothbrush characterized by the ratio of the total area of the said center flock hole and the total area of the said both outer flock holes being the range of 1: 0.6-1: 2.8.

前記中央毛束列の毛丈が、前記両外側毛束列の毛丈よりも低くなっていて、その高低段差が最大０．５〜２．０ｍｍの範囲であることを特徴とする請求項１記載の歯ブラシ。 2. The hair length of the central hair bundle row is lower than the hair lengths of the outer hair bundle rows, and the height difference is in a range of 0.5 to 2.0 mm at the maximum. The toothbrush described.

前記中央毛束列の刷毛、および前記両外側毛束列の刷毛において、断面に溝部を有する形状の刷毛を用いていることを特徴とする請求項１または２記載の歯ブラシ。 The toothbrush according to claim 1 or 2, wherein a brush having a groove shape in a cross section is used in the brush of the central bristle bundle and the brush of the outer bristle bundles.