JPH1175940A - Toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush which can simultaneously satisfy all of a cleaning effect for a tooth surface, a scraping effect for a border between teeth and gums, and a hitting feeling to gums. SOLUTION: On a bristling surface 1a of a head part 1, a plurality of bristle bundles 3 wherein the cross sectional shape is an X-shape are planted along the central line L in the longitudinal direction of the head part 1, and at the same time, a plurality of bristle bundles 4 having a smaller bristle stiffness than the bristle bundles 3, are planted on both external sides of the bristle bundles 3. When teeth are brushed by a scrubbing method using this toothbrush, tartar on the surfaces of teeth and food residues can be effectively scraped off by a sharp end protruding part of each bristle bundle 3 having the X-shaped cross section, being planted along the central line L in the longitudinal direction of the head part 1. Also, the bristle bundles 4 having the smaller bristle stiffness, which are planted on both external sides of the bristle bundles 3, hit the border between teeth and gums and brush there gently, and the hitting feeling to gums is improved as well.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、スクラブ法による
歯磨きに適した歯ブラシに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush suitable for brushing teeth by a scrub method.

【０００２】[0002]

【従来の技術】最も一般的な歯ブラシの製造方法として
は、予めヘッド部の植毛面に形成した複数の植毛孔に、
ナイロンやＰＢＴなどの用毛を束ねた毛束を差し込んで
金属片（これを平線という）で固定する方法が知られて
いる。この平線を用いた方法によるときは、製造法の制
約上、特別な場合を除いて毛束の断面形状は円形とする
のが普通である。2. Description of the Related Art The most common method of manufacturing a toothbrush includes a plurality of flocked holes formed in advance on a flocked surface of a head portion.
2. Description of the Related Art There is known a method in which a bundle of hair such as nylon or PBT is inserted and fixed with a metal piece (this is called a flat wire). When the method using the flat wire is used, the cross-sectional shape of the hair bundle is generally circular except for a special case due to the restriction of the manufacturing method.

【０００３】一方、平線を使用しない製造方法として
は、熱融着により毛束をヘッド部に固定する方法（例え
ば、特開昭６０−２４１４０４号、特開平２−９９００
２号、特開平４−２２６６１０号）や、インモールドに
よる方法（例えば、特公平６−１６７２５号、特開昭６
１−２６８２０８号、特開平２−５０３１５０号）など
が知られている。これらの方法によれば、平線を使用し
ないで毛束を固定できるため、いろいろな断面形状の毛
束を植毛できるといった利点がある。On the other hand, as a manufacturing method not using a flat wire, a method of fixing a hair bundle to a head portion by heat fusion (for example, JP-A-60-241404, JP-A-2-9900)
No. 2, JP-A-4-226610) and a method by in-mold (for example, Japanese Patent Publication No. 6-16725,
No. 1-268208, JP-A-2-503150) and the like are known. According to these methods, the hair bundle can be fixed without using a flat wire, so that there is an advantage that hair bundles having various cross-sectional shapes can be planted.

【０００４】例えば、前記円形以外の毛束断面形状の例
を挙げると、長方形やＸ形として実開昭６３−９９５２
７号、ハート形や十字形の毛束として実開昭６３−１６
３６３４号、凹レンズ状の毛束として実開平６−５７２
３０号、楕円形，四角形あるいは半円などの組み合わせ
として特開平９−１８２６２６号、特開平９−１８２６
２７号、特開平９−１８２６２７号などが知られてい
る。[0004] For example, as an example of the cross-sectional shape of the hair bundle other than the above-mentioned circular shape, the shape is rectangular or X-shaped.
No.7, as a heart-shaped or cross-shaped hair bundle
No. 3634, as a concave lens-shaped hair bundle
No. 30, Japanese Patent Application Laid-Open No. 9-182626 and Japanese Patent Application Laid-Open No.
No. 27, JP-A-9-182627 and the like are known.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、上述し
た従来の毛束断面形状を採用した歯ブラシにあっては、
それぞれ一長一短があり、歯牙表面の清掃力と、歯と歯
茎の境目の刷掃効果と、歯茎への当たり心地のすべてを
同時に満足することは難しかった。However, in the toothbrush employing the above-mentioned conventional bristle bundle cross-sectional shape,
Each has its strengths and weaknesses, and it has been difficult to simultaneously satisfy all of the cleaning power of the tooth surface, the cleaning effect of the boundary between the teeth and the gums, and the comfort of contacting the gums.

【０００６】本発明は、このような問題を解決するため
になされたもので、歯ブラシをヘッド部の長軸方向に往
復動してブラッシングするスクラブ法による歯磨きに適
し、このスクラブ法によって歯磨きすることにより、歯
牙表面の清掃効果と、歯と歯茎の境目の刷掃効果と、歯
茎への当たり心地のすべてを同時に満足することのでき
る歯ブラシを提供することを目的とする。The present invention has been made in order to solve such a problem, and is suitable for tooth brushing by a scrub method in which a toothbrush is reciprocated in the longitudinal direction of a head portion and is brushed. Accordingly, an object of the present invention is to provide a toothbrush capable of simultaneously satisfying all of a tooth surface cleaning effect, a tooth-gum boundary cleaning effect, and gum contact comfort.

【０００７】[0007]

【課題を解決するための手段】上記目的を達成するた
め、本発明は、ヘッド部の植毛面に複数の毛束を植毛し
た歯ブラシにおいて、ヘッド部の長軸方向のほぼ中心線
に沿って、ヘッド部の幅方向に向かう２辺が凹状をした
毛束断面形状になる毛束を単数もしくは複数植毛すると
ともに、該中心線に沿った毛束の両外側に中心線に沿っ
た毛束よりも毛腰強度の小さな毛束を複数植毛した。な
お、前記中心線に沿った毛束の毛束断面形状としては、
Ｘ形または凹レンズ状とすることが好ましい。また、前
記中心線に沿った毛束の用毛径よりもその両外側の毛束
の用毛径を小さくすることにより、中心線に沿った毛束
よりもその両外側の毛束の毛腰強度を小さくすることが
好ましい。In order to achieve the above object, the present invention provides a toothbrush in which a plurality of bristle bundles are planted on a flocked surface of a head portion. A single or a plurality of hair bundles having a hair bundle cross-sectional shape in which two sides in the width direction of the head portion have a concave shape are planted, and both outer sides of the hair bundle along the center line are larger than the hair bundle along the center line. A plurality of hair bundles with small hair lumps were planted. In addition, as a hair bundle cross-sectional shape of the hair bundle along the center line,
It is preferred to have an X shape or a concave lens shape. Further, by making the hair diameters of the hair bundles on both outer sides thereof smaller than the hair diameters of the hair bundles along the center line, the hair lumps of the hair bundles on both outer sides thereof are made larger than the hair bundles along the center line. It is preferable to reduce the strength.

【０００８】[0008]

【作用】本発明の歯ブラシを用いてスクラブ法で歯磨き
を行なうと、ヘッド部の長軸方向のほぼ中心線に沿って
植毛した、ヘッド部の幅方向に向かう２辺が凹状をした
毛束断面形状になる毛束の尖端角部、例えば、断面Ｘ形
や凹レンズ状になる毛束の凹状部で歯垢や食べ滓を効果
的にかき取ることができ、歯牙表面の清掃力が向上する
とともに、刷掃実感が向上する。さらに、毛腰の柔らか
い両外側の毛束が歯と歯茎の境目に当たって優しくブラ
ッシングするので、刷掃効果が上がるとともに、歯茎へ
の当たり心地も向上する。When the toothbrush of the present invention is used to brush the teeth by the scrub method, the hair is implanted along a substantially central line in the major axis direction of the head portion, and a bristle cross section in which two sides in the width direction of the head portion are concave. The tip corners of the bristle to be shaped, for example, the concave portion of the bristle to become an X-shaped cross section or a concave lens shape, can effectively scrape plaque and food residue, and improve the cleaning power of the tooth surface. In addition, the feeling of actual cleaning is improved. Furthermore, since the bristle tufts on both sides of the bristle are softly brushed at the boundary between the teeth and the gums, the brushing effect is improved and the contact with the gums is also improved.

【０００９】[0009]

【発明の実施の形態】本発明の実施形態について図面を
参照して説明する。図１に、本発明に係る歯ブラシの第
１の実施形態を示す。図において、１はヘッド部であっ
て、このヘッド部１は首部２を介して図示しない把持部
に一体に連続されている。この第１の実施形態において
は、ヘッド部１の植毛面１ａに、ヘッド部１の長軸方向
の中心線Ｌに沿って、毛束断面形状がＸ形になる毛束３
を複数植毛するとともに、この断面Ｘ形の毛束列の両外
側に該断面Ｘ形の毛束３よりも毛腰強度の小さな毛束４
を複数植毛したものである。５は、中央列の毛束３の長
軸方向先端部に植毛した断面丸形の毛束である。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of a toothbrush according to the present invention. In the drawing, reference numeral 1 denotes a head portion, and the head portion 1 is integrally connected to a grip portion (not shown) via a neck portion 2. In the first embodiment, a hair bundle 3 having a hair bundle cross-sectional shape of X-shape is provided on a flocking surface 1a of the head portion 1 along a center line L in the major axis direction of the head portion 1.
A plurality of hair bundles 4 having smaller hair lumbar strength than the hair bundle 3 having the X-shaped cross section on both outer sides of the row of hair bundles having the X-shaped cross section.
Are planted. Reference numeral 5 denotes a bristle bundle with a round cross-section, which is planted at the longitudinal end of the bristle bundle 3 in the central row.

【００１０】上記ヘッド部１、首部２、図示を略した把
持部の構成素材としては、ポリプロピレン、ポリエステ
ル、ＡＢＳ、ＰＭＭＡ、ポリカーボネート、セルロース
プロピオネート、ポリアセタールといった周知の樹脂が
用いられるが、コストおよび成形性の点からポリプロピ
レンがより好ましい。また、図示を略した把持部の一部
に熱可塑性エラストマーを用いて、いわゆる２色成形と
すれば、歯ブラシ全体の弾力をより大きくすることがで
き、歯茎への当たり心地をさらに向上することができ
る。Well-known resins such as polypropylene, polyester, ABS, PMMA, polycarbonate, cellulose propionate, and polyacetal are used as constituent materials of the head portion 1, neck portion 2, and gripping portion (not shown). From the viewpoint of moldability, polypropylene is more preferable. Further, if a so-called two-color molding is performed by using a thermoplastic elastomer for a part of a gripping part (not shown), the elasticity of the entire toothbrush can be further increased, and the contact with the gum can be further improved. it can.

【００１１】各毛束３，４，５に用いる用毛としては、
ナイロンもしくはポリエステルが好ましいが、特に限定
されるものではない。また、ナイロンとポリエステルを
組み合わせてもよい。さらに、中央列の毛束３を構成す
る用毛としては、清掃力および刷掃実感の点から、０．
１５〜０．２８ｍｍ（＝６〜１１ｍｉｌ）程度の太さの
用毛を用いることが好ましい。また、両外側の毛束４を
構成する用毛としては、清掃力および歯茎への当たり心
地の点から、０．１２〜０．２１ｍｍ（＝５〜８ｍｉ
ｌ）程度の太さの用毛を用いることが好ましい。これら
の用毛は、適宜組み合わせて使用することができる。The hair used for each of the hair bundles 3, 4, 5 is as follows:
Nylon or polyester is preferred, but is not particularly limited. Further, nylon and polyester may be combined. Further, as the hair constituting the hair bundle 3 in the center row, from the viewpoint of the cleaning power and the feeling of actual cleaning, the hair is used in an amount of 0.1.
It is preferable to use hair having a thickness of about 15 to 0.28 mm (= 6 to 11 mil). In addition, the bristles constituting the hair bundles 4 on both outer sides are 0.12 to 0.21 mm (= 5 to 8 mi) from the viewpoint of cleaning power and comfort against the gums.
It is preferable to use hair of about l) thickness. These hairs can be used in appropriate combination.

【００１２】なお、図示例においては、中央列の毛束３
をヘッド部１の長軸方向の中心線Ｌ上に配置したが、ほ
ぼこの中心線Ｌに沿って配置すれば十分である。また、
各毛束３は、図示するように、ヘッド部１の外形形状に
合わせて、ヘッド部１の長軸方向の中央部に位置する毛
束を最も大きな断面積とし、その前後方向に行くに従っ
て毛束の断面積断面を小さくしていくことが好ましい
が、これに限定されるものではない。In the illustrated example, the hair bundle 3 in the center row is shown.
Are arranged on the center line L in the long axis direction of the head portion 1, but it is sufficient to arrange them substantially along this center line L. Also,
As shown in the figure, each bristle bundle 3 has the largest cross-sectional area in the bristle bundle located at the central part in the major axis direction of the head unit 1 in accordance with the external shape of the head unit 1, and the bristle goes in the front-back direction. It is preferable to reduce the cross-sectional area of the bundle, but the present invention is not limited to this.

【００１３】また、毛束の毛腰強度は、毛束の断面積が
同一の場合、用毛径を変えることによって調整すること
ができるし、また、同一径の用毛を用いる場合、用毛の
硬さを変えることによって調整することができる。な
お、毛腰強度は、ＪＩＳ Ｓ３０１６−１９９５の毛の
硬さ試験法に記載の装置によって測定することができ
る。Further, the bristle strength of the hair bundle can be adjusted by changing the hair diameter when the cross-sectional area of the hair bundle is the same, or when the hair having the same diameter is used, Can be adjusted by changing the hardness. The hair stiffness can be measured by an apparatus described in a hair hardness test method of JIS S3016-1995.

【００１４】中央列の毛束３の両外側に植毛した毛束４
の断面形状としては、円形、楕円形、長楕円形、長方形
などを用いることができるが、これらに限定されるもの
ではない。また、図１に示したように、必要に応じてヘ
ッド部１の外形形状に沿って変形してもよい。また、す
べての毛束４が同じ断面形状である必要もない。Hair bundles 4 planted on both outer sides of the hair bundle 3 in the center row
Can be used as a cross-sectional shape, but is not limited thereto. Further, as shown in FIG. 1, the head portion 1 may be deformed along the outer shape as needed. Further, it is not necessary that all the hair bundles 4 have the same cross-sectional shape.

【００１５】さらに、ブラシ先端面を形成する植毛部全
体の毛切り形状としては、一般的な平切りでもよく、ま
た、中央列の毛束３を両外側の毛束４よりも０．５〜２
ｍｍ程度高くあるいは低くしてもよい。また、平切り形
状の他、図３（ａ）に示すようなブラックカット、図３
（ｂ）に示すようなドームカット、図３（ｃ）に示すよ
うな逆ドームカットなどに成形してもよいものである。
各毛束３，４，５をヘッド部１に植毛するには、公知の
熱融着法やインモールド法を利用すればよいが、生産性
および植毛強度の点から特にインモールド法によること
が望ましい。Further, the hair cutting shape of the entire flocked portion forming the brush tip surface may be a general flat cutting, and the center row of the bristle bundles 3 may be 0.5 to 0.5 times smaller than the outer bristle bundles 4. 2
It may be higher or lower by about mm. Further, in addition to the flat cut shape, a black cut as shown in FIG.
It may be formed into a dome cut as shown in FIG. 3B or an inverted dome cut as shown in FIG. 3C.
In order to implant the bristle bundles 3, 4, and 5 into the head portion 1, a known heat fusion method or in-mold method may be used. desirable.

【００１６】上記第１の実施形態の歯ブラシにあって
は、歯ブラシをヘッド部１の長軸方向に往復動してブラ
ッシングするスクラブ法で歯磨きすると、ヘッド部１の
長軸方向の中心線Ｌに沿って植毛した断面Ｘ形の各毛束
３の４つの尖端角部が歯牙表面の歯垢や食べ滓を効果的
にかき取る。また、この断面Ｘ形の毛束３の両外側に配
置した毛腰強度の小さな毛束４が歯と歯茎の境目に当た
って優しくブラッシングするため、歯茎への当たり心地
も向上し、良好なブラッシング感を得ることができる。In the toothbrush of the first embodiment, when the toothbrush is brushed by a scrub method in which the toothbrush is reciprocated in the major axis direction of the head portion 1 and brushed, the toothbrush is aligned with the center line L in the major axis direction of the head portion 1. The four pointed corners of each hair bundle 3 having an X-shaped cross section planted along the surface effectively scrape plaque and food residue on the tooth surface. In addition, since the bristle tufts 4 having small stiffness arranged on both outer sides of the bristle bundle 3 having the X-shaped cross section gently brush at the boundary between the teeth and the gums, the feeling of contact with the gums is improved, and a good brushing feeling is obtained. Obtainable.

【００１７】図２に、本発明の第２の実施形態を示す。
なお、図１と同一部分には同一の符号を付して示した。
この第２の実施形態の場合、ヘッド部１の植毛面１ａ
に、ヘッド部１の長軸方向の中心線Ｌに沿って、断面形
状が凹レンズ状になる毛束１３を複数植毛するととも
に、この断面凹レンズ状の毛束列の両外側に該断面凹レ
ンズ状の毛束１３よりも毛腰強度の小さな断面楕円状の
毛束１４を複数植毛したものである。１５はヘッド部先
端に植毛した断面半月状の毛束、１６は中央列の毛束１
３の長軸方向前後端部に植毛した断面四角形の毛束であ
る。なお、各毛束１２〜１６を構成する用毛の材質や太
さ、毛腰強度、毛切り形状ならびにその他の諸性状につ
いては、前記第１の実施形態の歯ブラシと同様である。FIG. 2 shows a second embodiment of the present invention.
The same parts as those in FIG. 1 are denoted by the same reference numerals.
In the case of the second embodiment, the flocking surface 1a of the head 1
A plurality of bristle bundles 13 having a concave lens shape in cross section are implanted along a center line L in the long axis direction of the head portion 1, and the concave lens shape in cross section is provided on both outer sides of the hair bundle row having the concave lens shape in cross section. A plurality of hair bundles 14 having an elliptical cross section having a lower bristle strength than the hair bundle 13 are planted. Reference numeral 15 denotes a hair bundle having a semicircular cross section implanted at the head end, and reference numeral 16 denotes a hair bundle 1 in the center row.
3 is a hair bundle having a square cross section planted at the front and rear ends in the long axis direction. In addition, the material and thickness of the bristles constituting each of the bristle bundles 12 to 16 are the same as those of the toothbrush according to the first embodiment described above, with respect to the bristle strength, the hair cutting shape, and other various properties.

【００１８】この第２の実施形態の歯ブラシにあって
は、スクラブ法で歯磨きすると、前述した第１の実施形
態の場合と同様に、ヘッド部１の長軸方向の中心線Ｌに
沿って植毛した断面凹レンズ状の各毛束１３の四隅の尖
端角部が歯牙表面の歯垢や食べ滓を効果的にかき取る。
また、この断面凹レンズ状の毛束１３の両外側に配置し
た毛腰強度の小さな毛束１４が歯と歯茎の境目に当たっ
て優しくブラッシングするため、歯茎への当たり心地も
向上し、良好なブラッシング感を得ることができる。In the toothbrush of the second embodiment, when the toothbrush is brushed by the scrub method, as in the case of the first embodiment described above, the hair is implanted along the longitudinal center line L of the head portion 1. The four pointed corners of each bristle bundle 13 having a concave lens cross section effectively scrape plaque and food residue on the tooth surface.
In addition, since the bristle bundles 14 with small bristle strength arranged on both outer sides of the bristle bundle 13 having a concave lens shape in cross section gently brush at the boundary between the teeth and the gums, the feeling of contact with the gums is improved, and a good brushing feeling is obtained. Obtainable.

【００１９】なお、上述した第１および第２の実施形態
の場合、毛束３または１３をヘッド部１の長軸方向の中
心線Ｌに沿ってそれぞれ複数植毛したが、この毛束３ま
たは１３はヘッド部１の長軸方向の中心線Ｌ上に１個だ
け植毛してもよいものである。本発明の歯ブラシは、ヘ
ッド部１の長軸方向の中心線Ｌに沿って植毛する毛束の
数には何ら限定されない。In the first and second embodiments described above, a plurality of hair bundles 3 or 13 are implanted along the longitudinal center line L of the head portion 1, respectively. Can be implanted only on the center line L in the longitudinal direction of the head portion 1. In the toothbrush of the present invention, the number of bristle bundles implanted along the center line L in the long axis direction of the head portion 1 is not limited at all.

【００２０】図４に、ヘッド部１の長軸方向の中心線Ｌ
に沿って植毛する毛束の他の断面形状例を示す。（ａ）
は断面十字状の毛束、（ｂ）は断面糸巻状の毛束の場合
の例である。第１および第２実施形態ならびに図５の例
から明らかなように、ヘッド部１の長軸方向の中央線Ｌ
に沿って植毛する毛束の断面形状としては、ヘッド部１
の幅方向に向かう２辺が少なくとも凹状部とされておれ
ば十分であり、このような断面形状になる毛束を用いる
ことによって、形状によってその効果に若干の差はある
ものの、それぞれ同様の効果を奏することができるもの
である。FIG. 4 shows a longitudinal center line L of the head 1.
7 shows another example of a cross-sectional shape of a hair bundle that is implanted along the hair bundle. (A)
Is an example of a hair bundle having a cross-shaped cross section, and (b) is an example of a hair bundle having a thread-shaped cross section. As is clear from the first and second embodiments and the example of FIG. 5, the center line L in the long axis direction of the head 1 is
The cross-sectional shape of the hair bundle to be implanted along the
It is sufficient that at least two sides in the width direction are concave portions, and by using a hair bundle having such a cross-sectional shape, there is a slight difference in the effect depending on the shape, but the same effect is obtained. Can be played.

【００２１】[0021]

【発明の効果】以上説明したように、本発明の歯ブラシ
によるときは、ヘッド部の長軸方向のほぼ中心線に沿っ
て、ヘッド部の幅方向に向かう２辺が凹状をした毛束断
面形状になる毛束を単数もしくは複数植毛したので、ス
クラブ法によって歯を磨くと、ヘッド部の長軸方向のほ
ぼ中心線に沿って配置した毛束の尖端角部で歯牙表面の
歯垢や食べ滓を効果的にかき取ることができる。このた
め、歯牙表面の清掃力が向上するとともに、刷掃実感を
向上することができる。As described above, when the toothbrush of the present invention is used, the cross section of the bristle bundle whose two sides in the width direction of the head section are concave along the substantially central line in the longitudinal direction of the head section. When one or more hair bundles were planted, brushing the teeth with the scrubbing method resulted in plaque and food residue on the tooth surface at the sharp corners of the hair bundles, which were arranged almost along the center line in the long axis direction of the head. Can be effectively scraped off. For this reason, the cleaning power of the tooth surface is improved, and the feeling of actual cleaning can be improved.

【００２２】さらに、中心線に沿った毛束の両外側に当
該中心線に沿った毛束よりも毛腰強度の小さな毛束を複
数植毛しているので、この毛腰強度の小さな毛束が歯と
歯茎の境目に当たって優しくブラッシングする。このた
め、刷掃効果が上がるとともに、歯茎への当たり心地も
向上する。Further, since a plurality of hair bundles having a lower bristle strength than the bristle bundle along the center line are planted on both outer sides of the bristle bundle along the center line, the bristle bundle having a lower bristle strength is formed. Gently brush at the border between teeth and gums. For this reason, the brushing effect is improved, and the feeling of contact with the gums is also improved.

【００２３】したがって、本発明によるときは、歯牙表
面の清掃性に優れ、刷掃実感が高く、しかも、歯茎への
当たり心地の良い、スクラブ法による歯磨きに最適な歯
ブラシを提供することができる。Therefore, according to the present invention, it is possible to provide a toothbrush which is excellent in cleaning properties of the tooth surface, has a high feeling of brushing, and has good contact with the gums, and is most suitable for brushing the teeth by the scrub method.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係る歯ブラシの第１の実施形態を示す
ヘッド部の平面図である。FIG. 1 is a plan view of a head section showing a first embodiment of a toothbrush according to the present invention.

【図２】本発明に係る歯ブラシの第２の実施形態を示す
ヘッド部の平面図である。FIG. 2 is a plan view of a head section showing a second embodiment of the toothbrush according to the present invention.

【図３】植毛部全体の毛切り形状の例を示す図であっ
て、（ａ）はブラックカット、（ｂ）はドームカット、
（ｃ）は逆ドームカットの場合をそれぞれ示すものであ
る。3A and 3B are diagrams showing examples of the hair cutting shape of the entire flocked portion, wherein FIG. 3A is a black cut, FIG.
(C) shows the case of an inverted dome cut, respectively.

【図４】ヘッド部の長軸方向の中心線に沿って植毛する
毛束の他の断面形状例を示す図であって、（ａ）は断面
十字形の毛束、（ｂ）は断面糸巻状の毛束の場合をそれ
ぞれ示すものである。4A and 4B are diagrams illustrating another example of a cross-sectional shape of a hair bundle implanted along a center line in a major axis direction of a head portion, wherein FIG. 4A is a cross-shaped hair bundle, and FIG. 1 shows a case of a hair bundle in a shape of a circle.

【符号の説明】[Explanation of symbols]

１ ヘッド部 １ａ 植毛面 ２ 首部 ３ 断面Ｘ形の毛束 ４ 両外側の毛束 ５ その他の毛束 １３ 断面凹レンズ状の毛束 １４ 両外側の毛束 １５，１６ その他の毛束 Ｌ ヘッド部の長軸方向の中心線 DESCRIPTION OF SYMBOLS 1 Head part 1a Flocked surface 2 Neck part 3 Hair bundle of X-shaped cross section 4 Hair bundle of both outer sides 5 Other hair bundle 13 Hair bundle of concave lens shape in cross section 14 Hair bundle of both outer sides 15, 16 Other hair bundle L Longitudinal centerline

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 ヘッド部の植毛面に複数の毛束を植毛し
た歯ブラシにおいて、 ヘッド部の長軸方向のほぼ中心線に沿って、ヘッド部の
幅方向に向かう２辺が凹状をした毛束断面形状になる毛
束を単数もしくは複数植毛するとともに、該中心線に沿
った毛束の両外側に当該中心線に沿った毛束よりも毛腰
強度の小さな毛束を複数植毛したことを特徴とする歯ブ
ラシ。1. A toothbrush in which a plurality of bristles are planted on a flocked surface of a head portion, wherein two sides of the head portion in the width direction of the head portion are concave along a substantially center line in a longitudinal direction of the head portion. A single or a plurality of hair bundles having a cross-sectional shape are planted, and a plurality of hair bundles having a lower stiffness than the hair bundles along the center line are planted on both outer sides of the hair bundle along the center line. And a toothbrush. 【請求項２】 前記中心線に沿った毛束の毛束断面形状
がＸ形または凹レンズ状であることを特徴とする請求項
１記載の歯ブラシ。2. The toothbrush according to claim 1, wherein a cross section of the bristle bundle along the center line has an X shape or a concave lens shape. 【請求項３】 前記中心線に沿った毛束の用毛径よりも
その両外側の毛束の用毛径を小さくすることにより、中
心線に沿った毛束よりもその両外側の毛束の毛腰強度を
小さくしたことを特徴とする請求項１または２記載の歯
ブラシ。3. The hair bundle on both outer sides of the hair bundle along the center line by making the hair diameter of the hair bundle on both outer sides thereof smaller than the hair diameter of the hair bundle on the center line along the center line. 3. The toothbrush according to claim 1, wherein the bristle strength of the toothbrush is reduced.