JP2009273760A - Toothbrush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toothbrush capable of highly efficiently brushing teeth while holding a state of pushing the bristle ends at the tip of a brush part against a considerable contact area from an interdental part of a tooth face to a smooth part without applying so much force thereto when brushing especially anterior teeth. <P>SOLUTION: When viewing a brush part 16 from the side, this toothbrush is formed with a small crest part 17 where a ridge line (s) formed by connecting the tips of bristle bundles 15a and 15b is disposed at the tip part of the brush part 16, and a large crest part 18 that continues rearward the small crest part 17, and having the length L2 in the brush part longitudinal direction X larger than that of the small crest part 17, wherein the height of the large crest part 18 from the bristle-filling base 11 is gradually formed higher from a trough bottom part formed between itself and the small crest part 17, toward a top portion 18a. The top portion 17a of the small crest part 17 is formed higher than the top portion 18a of the large crest part 18 and the length of a line segment L formed by connecting the top portion 17a of the small crest part 17 to the top portion 18a of the large crest part 18 is defined to 4.3-9.2 mm. The length of a perpendicular drawn from the trough bottom part 19 to the line segment L is defined to 0.8-1.6 mm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、歯ブラシに関し、特に複数本のブリッスルを束ねてなる毛束を植毛台に複数植設してブラシ部が形成された歯ブラシに関する。   The present invention relates to a toothbrush, and more particularly to a toothbrush in which a plurality of bristles formed by bundling a plurality of bristles are implanted in a flocking table to form a brush portion.

歯ブラシは、複数本のブリッスルを束ねてなる毛束を、例えば植毛台に設けられた複数の植毛穴に平線を打ち込んだり、熱で融着させる方法等によって植設固定することにより、複数の毛束からなるブラシ部を形成して得られるものである。また、歯ブラシは、歯面の歯間部と平滑部、歯面の頬側と舌側等の歯の部位や、前歯、奥歯等の歯の種類に応じた適切な刷掃を効率良く行うことができるように、毛束の配置やブラシ部の全体の形状、ブリッスルの形状等に種々の工夫がなされている。   A toothbrush has a plurality of bristles bundled by fixing a plurality of bristles by, for example, implanting a flat wire into a plurality of flock holes provided in a flocking table or fusing them by heat. It is obtained by forming a brush portion comprising a hair bundle. In addition, the toothbrush should efficiently perform appropriate brushing according to the tooth parts such as the interdental and smooth parts of the tooth surface, the buccal side and the lingual side of the tooth surface, and the tooth type such as the front teeth and the back teeth. Various ideas have been made on the arrangement of the hair bundle, the overall shape of the brush portion, the shape of the bristles, and the like.

例えば、ブラシ部を側面から見たときに、毛束の先端を結んだ先端線の稜線の形状が、連設する山形や波形となるようにブラシ部を形成して、歯間部や歯の舌側（裏側）の凹状部等、特に奥歯の歯間に対する歯垢除去機能を向上させた歯ブラシが開発されている（例えば、特許文献１、特許文献２参照）。
実開昭６２−１０２４３１号公報 特開２００６−１３００１２号公報 For example, when the brush part is viewed from the side, the brush part is formed so that the shape of the ridgeline of the tip line connecting the tips of the hair bundles is a continuous mountain shape or waveform, Toothbrushes have been developed that have an improved plaque removing function for the concave part on the lingual side (back side), especially between the back teeth (see, for example, Patent Document 1 and Patent Document 2).
Japanese Utility Model Publication No. 62-102431 JP 2006-130012 A

一方、効果的な歯の手入れの仕方として、ブラシ部の先端の毛先を歯面に押し当てながら、小さく細かな振動を与えてブラッシングを行う、スクラッビング法やバス法といった磨き方が知られている。このような磨き方では、あまり力を入れずにブラシ部の先端の毛先を歯面に押し当てた状態でも、歯面に対してできるだけ大きな接触面積を確保できるようにすることが望ましい。   On the other hand, as an effective way to care for teeth, brushing methods such as the scrubbing method and bath method are known in which brushing is performed by applying small and fine vibrations while pressing the tip of the brush part against the tooth surface. Yes. In such a polishing method, it is desirable to ensure a contact area as large as possible with respect to the tooth surface even in a state where the tip of the brush portion is pressed against the tooth surface without applying much force.

また、例えば、前歯を綺麗に見せるために着色除去性能に優れた歯磨き剤が種々開発されており、これらの歯磨き剤を用いて着色除去を目的とした歯の手入れを行う場合には、前歯の歯面の歯間部から平滑部に亘って、相当の接触面積でブラシ部の先端の毛先を押し当てた状態を保持して、効率良く前歯のブラッシングを行えるようにすることが望ましい。   In addition, for example, various toothpastes with excellent color removal performance have been developed to make the front teeth look beautiful.When using these toothpastes to maintain teeth for the purpose of color removal, It is desirable that the brushing of the front teeth can be performed efficiently by maintaining a state in which the tip of the brush portion is pressed with a considerable contact area from the interdental portion to the smooth portion of the tooth surface.

本発明は、奥歯と奥歯の歯間を磨きやすくするとともに、前歯に対してブラッシングを行う際に、あまり力を入れずに、歯間部から平滑部に亘って相当の接触面積でブラシ部の先端の毛先を押し当てた状態を保持して、効率良くブラッシングを行う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 makes it easy to brush between the back teeth and the back teeth, and when brushing the front teeth, the brush portion has a considerable contact area from the interdental portion to the smooth portion without applying too much force. It is an object of the present invention to provide a toothbrush that can efficiently perform brushing while maintaining a state in which the tip of the tip is pressed.

本発明は、植毛台に植毛された複数の毛束からなるブラシ部を有する歯ブラシであって、該ブラシ部を側面から見たときに、毛束の先端を結んだ稜線が、ブラシ部の長手方向の先端部分に配置される小山部と、谷底部を挟んで前記小山部の後方に連続し、前記小山部よりもブラシ部の長手方向長さの長い大山部とを含む形状を備え、前記大山部は、前記小山部との間の谷底部から頂部まで植毛台からの高さが徐々に高く形成され、前記小山部の頂部の植毛台からの高さは、前記大山部の頂部の植毛台からの高さよりも高く、前記小山部の頂部と前記大山部の頂部とを結んだ線分の長さが４．３〜９．２ｍｍで、前記谷底部から前記小山部の頂部と前記大山部の頂部とを結んだ線分に降ろした垂線の長さが０．８〜１．６ｍｍである歯ブラシを提供することにより、上記目的を達成したものである。   The present invention is a toothbrush having a brush portion comprising a plurality of hair bundles planted on a flocking table, and when the brush portion is viewed from the side, the ridge line connecting the tips of the hair bundles is the length of the brush portion. A shape including a small mountain portion arranged at a tip portion in the direction, a large mountain portion that is continuous to the rear of the small mountain portion across the valley bottom, and has a longer length in the longitudinal direction of the brush portion than the small mountain portion, The mountainous area is formed such that the height from the flocking table is gradually increased from the bottom of the valley to the top of the mountainous area, and the height from the flocking table at the top of the mountainous area is the flocking at the top of the mountainous area. The length of the line segment that is higher than the height from the platform and connects the top of the mountain and the top of the mountain is 4.3 to 9.2 mm, and from the valley bottom to the mountain top and the mountain A toothbrush with a length of 0.8 to 1.6 mm perpendicular to the line connecting the top of the part By subjecting, in which to achieve the above objects.

本発明の歯ブラシによれば、歯間部を効率よく磨くことを可能にしつつ、前歯に対してブラッシングを行う際に、あまり力を入れずに、歯間部から平滑部に亘って相当の接触面積でブラシ部の先端の毛先を押し当てた状態を保持して、効率良くブラッシングを行うことができる。   According to the toothbrush of the present invention, it is possible to polish the interdental portion efficiently, and when brushing the front teeth, considerable contact is made from the interdental portion to the smooth portion without applying much force. Brushing can be performed efficiently while maintaining the state where the tip of the brush portion is pressed against the area.

本発明の好ましい一実施形態に係る歯ブラシ１０は、図１（ａ），（ｂ）に示すように、把持部（図示せず）と植毛台１１とこれらの間に位置する首部１２とからなる。歯ブラシ１０は、歯ブラシ本体の植毛台１１に形成した複数の植毛穴１３（１３ａ，１３ｂ）に、複数本のブリッスル１４（１４ａ、１４ｂ）を束ねてなる毛束（タフト）１５（１５ａ，１５ｂ）を各々植毛（植設）することによって構成される。ここで、本実施形態によれば、第１植毛穴１３ａは、例えば直径が１〜２．５ｍｍの大きな直径の円形の植毛穴となっており、この第１植毛穴１３ａには、ひし形断面ブリッスル１４ａを束ねたひし形毛束１５ａが植設されている。また、第２植毛穴１３ｂは、例えば直径が１〜２．０ｍｍの、第１植毛穴１３ａと同じ、好ましくは第１植毛孔１３ａと比較して小さな直径の円形の植毛穴となっており、この第２植毛穴１３ｂには、円形断面ブリッスル１４ｂを束ねた円形毛束１５ｂが植設されている。   As shown in FIGS. 1A and 1B, a toothbrush 10 according to a preferred embodiment of the present invention includes a gripping portion (not shown), a flocking table 11, and a neck portion 12 positioned therebetween. . The toothbrush 10 includes a bunch of tufts 15 (15a, 15b) formed by bundling a plurality of bristles 14 (14a, 14b) in a plurality of flocking holes 13 (13a, 13b) formed in the flocking table 11 of the toothbrush body. Each is constructed by flocking (planting). Here, according to the present embodiment, the first flocking hole 13a is a circular flocking hole having a large diameter of, for example, 1 to 2.5 mm, and the first flocking hole 13a has a diamond-shaped cross-section bristle. A rhombic hair bundle 15a in which 14a is bundled is planted. The second flocking hole 13b is, for example, a circular flocking hole having a diameter of 1 to 2.0 mm, which is the same as the first flocking hole 13a, preferably smaller than the first flocking hole 13a. A circular hair bundle 15b in which circular cross-section bristles 14b are bundled is implanted in the second hair filling hole 13b.

そして、本実施形態の歯ブラシ１０は、複数の毛束１５ａ，１５ｂからなるブラシ部１６を有し、ブラシ部１６を側面から見たときに、毛束１５ａ，１５ｂの先端（歯ブラシ１０の短手方向Ｙで最も高い毛束の先端）を結んだ稜線ｓが、ブラシ部１６の長手方向Ｘの先端部分に配置される小山部１７と、谷底部１９を挟んで小山部１７の後方に連続し、小山部１７よりもブラシ部１６の長手方向Ｘの長さＬ２が大きな大山部１８とを含んだ形状を備えている。ここで、小山部１７と大山部１８の間の谷底部１９とは、稜線ｓが描く小山部１７と大山部１８の間の最も低い位置を意味する。そして、大山部１８は、谷底部１９から当該大山部１８の頂部１８ａまで植毛台１１からの高さが徐々に高くなっている。また、大山部１８の稜線１８ｂは、谷底部１９と大山部１８の頂部１８ａとを結んだ直線の植毛台１１の表面に対する傾きが、小山部１７の稜線１７ｂの谷底部１９と小山部１７の頂部１７ａとを結んだ直線の植毛台１１の表面に対する傾きよりも小さくなっている。   And the toothbrush 10 of this embodiment has the brush part 16 which consists of several hair | bristle bundles 15a and 15b, and when the brush part 16 is seen from a side, the front-end | tip (short side of the toothbrush 10) of the hair | bristle bundles 15a and 15b. The ridge line s connecting the tip of the highest hair bundle in the direction Y) continues to the rear of the small mountain portion 17 with the small mountain portion 17 disposed at the distal end portion in the longitudinal direction X of the brush portion 16 and the valley bottom portion 19 in between. , And a large mountain portion 18 having a length L2 in the longitudinal direction X of the brush portion 16 larger than that of the small mountain portion 17. Here, the valley bottom part 19 between the small mountain part 17 and the large mountain part 18 means the lowest position between the small mountain part 17 and the large mountain part 18 drawn by the ridge line s. And the high mountain part 18 is gradually high from the flock base 11 from the valley bottom part 19 to the top part 18a of the said large mountain part 18. Further, the ridge line 18b of the large mountain part 18 is inclined with respect to the surface of the flock base 11 by a straight line connecting the valley bottom part 19 and the top part 18a of the large mountain part 18 so that the valley bottom part 19 and the small mountain part 17 of the ridge line 17b of the small mountain part 17 It is smaller than the inclination with respect to the surface of the flock base 11 that connects the top portion 17a.

本実施形態の歯ブラシ１０は、小山部１７の頂部１７ａの植毛台１１からの高さが、大山部１８の頂部１８ａの植毛台１１からの高さよりも高く、小山部１７の頂部１７ａと大山部１８の頂部１８ａとを結んだ線分Ｌの長さが４．３〜９．２ｍｍとなっており、谷底部１９から小山部１７の頂部１７ａと大山部１８の頂部１８ａとを結んだ線分Ｌに降ろした垂線Ｄの長さが０．８〜１．６ｍｍとなっている。   In the toothbrush 10 of the present embodiment, the height of the top portion 17a of the small mountain portion 17 from the flocking table 11 is higher than the height of the top portion 18a of the large mountain portion 18 from the flocking table 11, and the top portion 17a and the large mountain portion of the small mountain portion 17 are. The length of the line segment L connecting 18 top portions 18a is 4.3 to 9.2 mm, and the line segment connecting the valley bottom portion 19 to the top portion 17a of the small mountain portion 17 and the top portion 18a of the large mountain portion 18 is connected. The length of the perpendicular D dropped to L is 0.8 to 1.6 mm.

また、本実施形態では、毛束１５ａ，１５ｂの先端を結んだ稜線ｓは、大山部１８の後方に谷底部２０を挟んで連続し、小山部１７と略対称形状の後方小山部２１を含んだ形状を備えている。   Further, in the present embodiment, the ridge line s connecting the tips of the hair bundles 15a and 15b is continuous with the valley bottom portion 20 behind the large mountain portion 18, and includes a rear small mountain portion 21 that is substantially symmetrical with the small mountain portion 17. It has a shape.

本実施形態では、歯ブラシ本体は、例えばポリプロピレン、ポリエステル、ＡＢＳ樹脂（アクリロニトリルブタジエンスチレン共重合体）等の合成樹脂からなり、その植毛台１１の平坦な表面には、長手方向Ｘの先端部分に３箇所の第１植毛穴１３ａが開口形成され、これらの第１植毛穴１３ａの後方部分には、ブラシ部１６の巾方向Ｙに３列、合計８箇所の第２植毛穴１３ｂが開口形成されている。またこれらの第２植毛穴１３ｂの後方部分には、ブラシ部１６の巾方向Ｙに１列、２箇所の第１植毛穴１３ａが開口形成されており、さらにこれらの第１植毛穴１３ａの後方部分には、ブラシ部１６の巾方向Ｙに２列、合計６箇所の第２植毛穴１３ｂが開口形成されている。そして、これらの第２植毛穴１３ｂの後方部分には、ブラシ部１６の長手方向Ｘの後端部分に位置して、ブラシ部１６の巾方向Ｙに１列、２箇所の第１植毛穴１３ａが開口形成されている。   In the present embodiment, the toothbrush body is made of a synthetic resin such as polypropylene, polyester, ABS resin (acrylonitrile butadiene styrene copolymer), for example, and the flat surface of the flocking table 11 has 3 tip portions in the longitudinal direction X. The first flocking holes 13a are formed as openings, and the rear portions of the first flocking holes 13a are formed with three rows in the width direction Y of the brush portion 16 and a total of eight second flocking holes 13b. Yes. In addition, at the rear part of these second flocking holes 13b, one row and two first flocking holes 13a are formed in the width direction Y of the brush portion 16, and further behind these first flocking holes 13a. The part is formed with a total of six second flocking holes 13 b in two rows in the width direction Y of the brush portion 16. And in the rear part of these 2nd flocking holes 13b, it is located in the rear-end part of longitudinal direction X of brush part 16, and the 1st flocking hole 13a of 1 row and 2 places in the width direction Y of brush part 16 Is formed as an opening.

これらの植毛穴１３ａ，１３ｂは、各々が１．５〜４．５ｍｍ程度の深さを有しており、各植毛穴１３ａ，１３ｂには、ひし形毛束１５ａ、或いは円形毛束１５ｂが、平線を打ち込む方法や熱で融着させる方法等によって、植毛台１１の表面から７〜１５ｍｍの毛丈で植設されている。先端部分の３箇所の第１植毛穴１３ａには、ひし形毛束１５ａが植設されている。そして、これらのひし形毛束１５ａの後方の８箇所の第２植毛穴１３ｂには、円形毛束１５ｂが植設され、その後方の２箇所の第１植毛穴１３ａにひし形毛束１５ａ、さらにその後方の６箇所の第２植毛穴１３ｂに円形毛束１５ｂ、その後方の２箇所の第１植毛穴１３ａにひし形毛束１５ａが植設され、これがブラシ部１６の後端に位置する。   Each of these flocked holes 13a and 13b has a depth of about 1.5 to 4.5 mm. In each flocked hole 13a and 13b, a rhombic hair bundle 15a or a circular hair bundle 15b is flat. It is planted with a hair length of 7 to 15 mm from the surface of the flocking table 11 by a method of driving a wire or a method of fusing with a heat. A rhombus hair bundle 15a is implanted in the first flocking holes 13a at three positions at the tip. Then, circular hair bundles 15b are planted in the eight second flock holes 13b behind the rhombic hair bundles 15a, and the rhombus hair bundles 15a are further inserted into the two first flock holes 13a behind them. Circular hair bundles 15b are installed in the six second hair transplant holes 13b, and rhombus hair bundles 15a are installed in the first two hair transplant holes 13a behind the second hair transplant holes 13b.

なお、本実施形態において、ひし形毛束１５ａとは全ブリッスル中の８０〜１００％がひし形断面ブリッスルとなっている毛束であり、円形毛束１５ｂとは円形又は６角形以上の正多角形断面ブリッスルからなる毛束である。   In the present embodiment, the rhombic hair bundle 15a is a hair bundle in which 80 to 100% of all the bristle is a diamond-shaped cross-section bristle, and the circular hair bundle 15b is a regular polygonal cross section of a circle or a hexagon or more. A hair bundle made of bristle.

上述のようにして、ひし形毛束１５ａ、及び円形毛束１５ｂが歯ブラシ１０の植毛台１１に植設されることにより、ひし形毛束１５ａは、面積比で、ブラシ部１６を構成する全毛束１５ａ，１５ｂの面積の総和の２５〜７５％の面積を占めている。ここで、各毛束１５ａ，１５ｂの面積は、各毛束１５ａ，１５ｂの根本部における断面積に相当し、これらが植設される第１植毛穴１３ａ、第２植毛穴１３ｂの開口面積を介して計算されるものである。本実施形態によれば、ひし形毛束１５ａは、ブラシ部１６を構成する複数の毛束１５ａ，１５ｂ内に面積比で２５〜５０％含まれていることが好ましく、３０〜４５％含まれていることがさらに好ましい。ひし形毛束１５ａが全毛束１５ａ，１５ｂ内に面積比で２５〜７５％含まれていることにより、歯垢除去に有効であるという利点が得られる。   As described above, the rhombic hair bundle 15a and the circular hair bundle 15b are implanted in the flock base 11 of the toothbrush 10, so that the rhombus hair bundle 15a has the area ratio and the whole hair bundle constituting the brush portion 16. It occupies an area of 25 to 75% of the total area of 15a and 15b. Here, the area of each hair bundle 15a, 15b is equivalent to the cross-sectional area in the root part of each hair bundle 15a, 15b, The opening area of the 1st flock hole 13a in which these are planted, and the 2nd flock hole 13b is set. It is calculated through. According to this embodiment, it is preferable that the rhombus hair bundle 15a is contained in the plurality of hair bundles 15a and 15b constituting the brush portion 16 in an area ratio of 25 to 50%, and 30 to 45%. More preferably. Since the rhomboid hair bundle 15a is contained in the whole hair bundles 15a and 15b in an area ratio of 25 to 75%, an advantage of being effective in removing plaque can be obtained.

ひし形毛束１５ａを構成するひし形断面ブリッスル１４ａは、ナイロン等の合成樹脂からなるフィラメント材であって、図３（ａ）に示すように、ひし形或いはひし形に近似する平行四辺形の断面形状を備えている。また、ひし形断面ブリッスル１４ａは、その毛径として、例えば断面二次半径の２倍が、６〜１０ｍｉｌ（０．１５〜０．２５ｍｍ）の太さを有し、これを例えば十数本〜数十本束ねることによって、上述の第１植毛穴１３ａの開口形状に相当し、例えば１．０〜２．５ｍｍの束径のひし形毛束１５ａが形成される。   The rhombic cross-sectional bristle 14a constituting the rhombic hair bundle 15a is a filament material made of synthetic resin such as nylon, and has a cross-sectional shape of a parallelogram that approximates a rhombus or a rhombus, as shown in FIG. ing. Moreover, as for the diamond-shaped cross-sectional bristle 14a, as a bristle diameter, for example, twice the cross-sectional secondary radius has a thickness of 6 to 10 mil (0.15 to 0.25 mm), and this is, for example, a dozen to several By bundling ten pieces, a rhombus hair bundle 15a having a bundle diameter of 1.0 to 2.5 mm, for example, corresponding to the opening shape of the first flocking hole 13a described above is formed.

ここで、ひし形断面ブリッスル１４ａの断面形状は、ひし形又は平行四辺形形状の２本の対角線において、短い対角線に対する長い対角線の比（長い対角線／短い対角線）が１．２〜１．９となっていることが好ましい。短い対角線に対する長い対角線の比が１．２〜１．９となっていることにより、ブリッスルが歯間部位に入りやすくなると共に歯面の平滑部に対するブリッスルの接触面積が大きくなる利点が得られる。また、ひし形毛束１５ａは、当該毛束１５ａを構成するブリッスル中にひし形断面ブリッスル１４ａが８０〜１００％含まれていれば、ひし形毛束１５ａとしての機能を十分に発揮することが可能になる。なお、本実施形態によれば、各ひし形断面ブリッスル１４ａの先端の毛先には、ラウンド加工が施されている他、テーパー形状に加工することもできる。   Here, as for the cross-sectional shape of the rhombus cross-section bristle 14a, the ratio of the long diagonal line to the short diagonal line (long diagonal line / short diagonal line) is 1.2 to 1.9 in two diagonal lines of rhombus or parallelogram shape. Preferably it is. When the ratio of the long diagonal line to the short diagonal line is 1.2 to 1.9, there is an advantage that the bristle easily enters the interdental region and the contact area of the bristle with the smooth portion of the tooth surface is increased. Further, the rhombus hair bundle 15a can sufficiently exhibit the function as the rhombus hair bundle 15a if the bristle constituting the hair bundle 15a includes 80-100% of the diamond cross-section bristle 14a. . In addition, according to this embodiment, in addition to the round process being given to the tip of each rhombus cross-section bristle 14a, it can also be processed into a taper shape.

円形毛束１５ｂを構成する円形断面ブリッスル１４ｂは、ナイロン等の合成樹脂や、豚毛などの天然素材からなるフィラメント材であって、図３（ｂ）に示すように、円形断面或いは６角形以上の正多角形断面を有している。また、円形断面ブリッスル１４ｂは、その毛径として、直径が例えば６〜１０ｍｉｌ（０．１５〜０．２５ｍｍ）の太さを有しており、これを例えば十数本〜数十本束ねることによって、上述の第２植毛穴１３ｂの開口形状に相当する、例えば１．０〜２．０ｍｍの束径の円形毛束１５ｂが形成されることになる。また、本実施形態によれば、各円形断面ブリッスル１４ｂの先端の毛先には、例えばラウンド加工を施すことができる他、テーパー形状や球状等に加工することもできる。   The circular cross-section bristle 14b constituting the circular hair bundle 15b is a filament material made of a synthetic material such as nylon or a natural material such as pig hair, and has a circular cross section or a hexagon or more as shown in FIG. Having a regular polygonal cross section. Moreover, the circular cross-section bristle 14b has a diameter of, for example, 6 to 10 mil (0.15 to 0.25 mm) as a bristle diameter. A circular hair bundle 15b having a bundle diameter of, for example, 1.0 to 2.0 mm, which corresponds to the opening shape of the second flocking hole 13b described above, is formed. In addition, according to the present embodiment, the tip of each circular cross-section bristle 14b can be rounded, for example, or can be processed into a tapered shape or a spherical shape.

そして、本実施形態の歯ブラシ１０によれば、図１（ｂ）及び図２に示すように、ブラシ部１６を側面から見たときに、毛束１５ａ，１５ｂの先端（ブラシ部１６の短手方向Ｙにおいて植毛台１１からの高さが最も高い先端）を結んだ稜線ｓが、ブラシ部１６の長手方向Ｘの先端部分に配置される小山部１７と、谷底部１９を挟んで小山部１７の後方に連続する大山部１８とを含む形状を備え、大山部１８は、小山部１７よりブラシ部１６の長手方向Ｘの長さＬ２が長く、稜線１８ｂの植毛台１１表面に対する傾きが小山部１７よりも小さくなっている。また、本実施形態によれば、ブラシ部１６は、その巾方向Ｙ（ブラシ部１６の短手方向）に沿った各列の毛束１５ａ，１５ｂの先端による稜線が凹凸を成すものであっても良いが、毛束１５ａ，１５ｂの先端を同じ高さとして、巾方向Ｙに各列の毛束の先端を結んだ稜線を概ね水平に形成することが効率的なブラッシングの観点から好ましい。ここで、巾方向Yに各列の毛束の先端を結んだ稜線が概ね水平にある場合は、毛束を構成するブリッスル又は各毛束の高さの差があっても、当該差が０．３ｍｍの範囲内、好ましくは０．１ｍｍの範囲内にある。また、側面から見た稜線ｓが、中央の大山部１８を挟んだ両側に、谷底部１９，２０を介して先端に小山部１７、後端に後方小山部２１が連続する、大山部１８の中央を中心として略対称な形状を備えることが好ましい。   And according to the toothbrush 10 of this embodiment, as shown in FIG.1 (b) and FIG. 2, when the brush part 16 is seen from a side, the front-end | tip (short side of the brush part 16) of the hair | bristle bundle 15a, 15b A ridge line s connecting a tip end having the highest height from the flock base 11 in the direction Y) and a ridge portion 17 sandwiching the valley bottom portion 19 between the ridge portion 17 disposed at the tip portion in the longitudinal direction X of the brush portion 16. The large mountain portion 18 has a longer length L2 in the longitudinal direction X of the brush portion 16 than the small mountain portion 17, and the inclination of the ridge line 18b with respect to the surface of the flock base 11 is a small mountain portion. It is smaller than 17. Further, according to the present embodiment, the brush portion 16 has a ridge line formed by the tips of the hair bundles 15a and 15b in each row along the width direction Y (short direction of the brush portion 16). However, it is preferable from the viewpoint of efficient brushing that the tips of the hair bundles 15a and 15b have the same height and the ridge line connecting the tips of the hair bundles in each row in the width direction Y is formed substantially horizontally. Here, when the ridge line connecting the tips of the hair bundles in each row in the width direction Y is substantially horizontal, even if there is a difference in the height of the bristle or each hair bundle constituting the hair bundle, the difference is 0. Within the range of 3 mm, preferably within the range of 0.1 mm. Further, the ridge line s seen from the side surface has a small mountain portion 17 at the tip and a rear small mountain portion 21 at the rear end via valley bottom portions 19 and 20 on both sides of the central large mountain portion 18. It is preferable to have a substantially symmetrical shape with the center as the center.

また、本実施形態では、小山部１７の頂部１７ａを挟んだ両側の稜線１７ｂは外側に凸の湾曲形状であって、曲率半径が２．０〜４．０ｍｍとなっていると共に、後方小山部２１の頂部２１ａを挟んだ両側の稜線２１ｂもまた外側に凸の湾曲形状であって、曲率半径が２．０〜４．５ｍｍとなっている。そして、大山部１８の稜線１８ｂも外側に凸の湾曲形状であって、小山部１７と後方小山部２１の稜線１７ｂ，２１ｂよりも曲率半径が大きく、曲率半径が１０〜２５ｍｍとなっている。   Further, in the present embodiment, the ridge lines 17b on both sides of the top portion 17a of the small mountain portion 17 have a curved shape that is convex outward, the radius of curvature is 2.0 to 4.0 mm, and the rear small mountain portion. The ridgelines 21b on both sides sandwiching the top 21a of 21 are also curved outwardly convex and have a radius of curvature of 2.0 to 4.5 mm. The ridge line 18b of the large mountain part 18 is also curved outwardly, and has a larger radius of curvature than the ridge lines 17b and 21b of the small mountain part 17 and the rear small mountain part 21, and the curvature radius is 10 to 25 mm.

さらに、本実施形態では、小山部１７の頂部１７ａの植毛台１１からの高さが、大山部１８の頂部１８ａの植毛台１１からの高さよりも高く、好ましくは０．２〜２．０ｍｍ、さらに好ましくは０．３〜０．７ｍｍ高い。小山部１７の頂部１７ａの植毛台１１からの高さが、大山部１８の頂部１８ａの植毛台１１からの高さよりも０．２〜２．０ｍｍ高くなっていることにより、小山部１７を歯間に入れた状態で大山部１８の歯面の平滑部への接触面積を大きくすることができる。   Furthermore, in this embodiment, the height from the flock base 11 of the top part 17a of the small mountain part 17 is higher than the height from the flock base 11 of the top part 18a of the large mountain part 18, preferably 0.2 to 2.0 mm, More preferably, it is 0.3 to 0.7 mm higher. The height from the flock base 11 of the top portion 17a of the small mountain portion 17 is 0.2 to 2.0 mm higher than the height from the flock base 11 of the top portion 18a of the large mountain portion 18, so that the small mountain portion 17 is toothed. The contact area to the smooth part of the tooth surface of the large mountain part 18 can be enlarged in the state where it was put in between.

そして、本実施形態では、小山部１７の頂部１７ａと大山部１８の頂部１８ａとを結んだ線分Ｌの長さが４．３〜９．２ｍｍとなっており、５．０〜７．８ｍｍとすることがさらに好ましい。この線分Ｌの長さを４．３〜９．２ｍｍとすることにより、小山部１７を歯間に入れた状態で大山部１８の歯面の平滑部への接触面積を大きくすることができる。.   In this embodiment, the length of the line segment L connecting the top portion 17a of the small mountain portion 17 and the top portion 18a of the large mountain portion 18 is 4.3 to 9.2 mm, and is 5.0 to 7.8 mm. More preferably. By setting the length of the line segment L to 4.3 to 9.2 mm, the contact area to the smooth portion of the tooth surface of the large mountain portion 18 can be increased in a state where the small mountain portion 17 is inserted between the teeth. . .

また、谷底部１９から小山部１７の頂部１７ａと大山部１８の頂部１８ａとを結んだ線分Ｌに降ろした垂線Ｄの長さは、０．８〜１．６ｍｍとすることが好ましく、０．９〜１．３ｍｍとすることがさらに好ましい。谷底部１９から線分Ｌに降ろした垂線Ｄの長さを０．８〜１．６ｍｍとすることにより、小山部１７を歯間に入れた状態で、大山部１８が歯面の平滑部に接触しやすくなり、特に前歯の歯面への接触面積を大きくすることができる。.   Moreover, it is preferable that the length of the perpendicular D dropped to the line segment L connecting the valley bottom portion 19 to the top portion 17a of the small mountain portion 17 and the top portion 18a of the large mountain portion 18 is 0.8 to 1.6 mm. More preferably, it is 9 to 1.3 mm. By setting the length of the perpendicular line D lowered from the valley bottom part 19 to the line segment L to 0.8 to 1.6 mm, the large mountain part 18 becomes the smooth part of the tooth surface with the small mountain part 17 inserted between the teeth. It becomes easy to contact, and especially the contact area to the tooth surface of the front tooth can be increased. .

さらに、本実施形態では、小山部１７のブラシ部１６の長手方向Ｘの長さＬ１は、４．０〜４．７ｍｍであることが好ましく、４．３〜４．７ｍｍであることがさらに好ましい。小山部１７の長手方向Ｘの長さＬ１が、４．０〜４．７ｍｍとなっていることにより、小山部１７を歯間に入れた状態で、小山部１７の山裾部の領域が歯面の平滑部に当たりにくくなり、谷底部１９が歯面の歯間部に続く角部に位置しやすくなり、大山部１８の平滑部への接触面積を大きくすることができる。   Furthermore, in this embodiment, the length L1 in the longitudinal direction X of the brush portion 16 of the small mountain portion 17 is preferably 4.0 to 4.7 mm, and more preferably 4.3 to 4.7 mm. . Since the length L1 in the longitudinal direction X of the small mountain portion 17 is 4.0 to 4.7 mm, the region of the mountain bottom portion of the small mountain portion 17 is a tooth surface in a state where the small mountain portion 17 is inserted between teeth. It becomes difficult to hit the smooth portion, and the valley bottom portion 19 is likely to be positioned at the corner portion following the interdental portion of the tooth surface, so that the contact area of the large mountain portion 18 with the smooth portion can be increased.

さらに、本実施形態では、大山部１８のブラシ部１６の長手方向Ｘの長さＬ２は、５．８〜１０．５ｍｍとなっていることが好ましい。大山部１８の長手方向Ｘの長さＬ２が、５．８〜１０．５ｍｍとなっていることにより、大山部１８を構成する毛束の先端による稜線１８ｂは、植毛台１１からの高さが谷底部１９から頂部１８ａに徐々に高く形成され、小山部１７を歯間に入れた状態で大山部１８の歯面の平滑部への接触面積を大きくすることができる。   Furthermore, in this embodiment, it is preferable that the length L2 of the brush part 16 of the large mountain part 18 of the longitudinal direction X is 5.8-10.5 mm. Since the length L2 in the longitudinal direction X of the large mountain portion 18 is 5.8 to 10.5 mm, the ridge line 18b formed by the tips of the hair bundles constituting the large mountain portion 18 has a height from the flocking table 11. It is gradually formed higher from the valley bottom 19 to the top 18a, and the contact area to the smooth portion of the tooth surface of the large mountain portion 18 can be increased in a state where the small mountain portion 17 is inserted between the teeth.

そして、上述の構成を備える本実施形態の歯ブラシ１０によれば、小山部１７によって歯間を効率良くブラッシングできると共に、大山部１８によって歯面を効率よくブラッシング可能とし、特に前歯に対してブラッシングを行う際に、あまり力を入れずに、歯面の歯間部から平滑部に亘って相当の接触面積でブラシ部１６の先端の毛先を押し当てた状態を保持して、効率良くブラッシングを行うことが可能になる。   According to the toothbrush 10 of the present embodiment having the above-described configuration, the teeth can be efficiently brushed by the small ridges 17, and the tooth surfaces can be efficiently brushed by the large ridges 18. In particular, the front teeth are brushed. When performing, brushing efficiently while maintaining the state where the tip of the brush portion 16 is pressed with a considerable contact area from the interdental portion of the tooth surface to the smooth portion without applying too much force. It becomes possible to do.

すなわち、本実施形態によれば、毛束１５ａ，１５ｂの先端を結んだ稜線ｓが、植毛台１１の先端部分に配置される小山部１７の稜線１７ｂと、谷底部１９を挟んで小山部１７の後方に連続し、小山部１７よりもブラシ部１６の長手方向長さの長い大山部１８の稜線１８ｂとを含んだ形状を備えており、且つ小山部１７の頂部１７ａが大山部１８の頂部１８ａよりも高く、小山部１７の頂部１７ａと大山部１８の頂部１８ａとを結んだ線分Ｌの長さが４．３〜９．２ｍｍ、谷底部１９から線分Ｌに降ろした垂線Ｄの長さが０．８〜１．６ｍｍとなっている。したがって、小山部１７によって歯間を効率よくブラッシングできるとともに、図４に示すように、ブラシ部１６の先端の毛先を歯面に押し当てながら、小さく細かな振動を与えてスクラッビング法やバス法によって前歯２２のブラッシングを行う際に、小山部１７の頂部１７ａを前歯２２の歯間部２２ａに挿入すれば、小山部１７と大山部１８との間の谷底部１９が、前歯２２の平滑部２２ｂの角部分に近接して配置されると共に、大山部１８の稜線１８ｂを形成する毛束の毛先が前歯２２の平滑部２２ｂの広い領域に亘って当接することになるので、前歯２２の歯間部２２ａと平滑部２２ｂとを、同時に広い範囲に亘って効率良くブラッシングすることが可能になる。 In other words, according to the present embodiment, the ridge line s connecting the tips of the hair bundles 15 a and 15 b is connected to the ridge line 17 b of the ridge portion 17 disposed at the tip portion of the flocking table 11 and the ridge portion 17 across the valley bottom portion 19. The ridge line 18b of the large mountain portion 18 that is longer in the longitudinal direction of the brush portion 16 than the small mountain portion 17, and the top portion 17a of the small mountain portion 17 is the top portion of the large mountain portion 18. It is higher than 18a, the length of the line segment L connecting the top part 17a of the small mountain part 17 and the top part 18a of the large mountain part 18 is 4.3 to 9.2 mm, and the perpendicular line D descending from the valley bottom part 19 to the line segment L The length is 0.8 to 1.6 mm. Therefore, the small teeth 17 can efficiently brush between the teeth, and as shown in FIG. 4, the brush tip 16 is pressed against the tooth surface while applying a small fine vibration to the scrubbing method or bath method. When brushing the front teeth 22 by inserting the apex portion 17a of the small ridge portion 17 into the interdental portion 22a of the front teeth 22, the valley bottom portion 19 between the small ridge portion 17 and the large mountain portion 18 becomes the smooth portion of the front teeth 22. The bristles of the hair bundle forming the ridge line 18b of the large mountain portion 18 come into contact with each other over a wide area of the smooth portion 22b of the front teeth 22, so that the front teeth 22 It is possible to efficiently brush the interdental portion 22a and the smooth portion 22b over a wide range at the same time.

また、本実施形態によれば、毛束１５ａ，１５ｂの先端を結んだ稜線ｓが、大山部１８の後方に小山部１７と略対称形状の後方小山部２１を含んだ形状となっているので、前歯２２に対する歯ブラシ本体のブラッシング角度を換えて、後方小山部２１の頂部２１ａを歯間に挿入可能とし、さらに、後方小山部２１を前歯２２の歯間部２２ａに挿入すれば、後方小山部２１と大山部１８との間の谷底部２０が、前歯２２の平滑部２２ｂの角部分に近接して配置されると共に、大山部１８の稜線１８ｂを形成する毛束の毛先が前歯２２の平滑部２２ｂの広い領域に亘って当接することになるので、上述と同様に、前歯２２の歯間部２２ａと平滑部２２ｂとを、同時に広い範囲に亘って効率良くブラッシングすることが可能になる。   In addition, according to the present embodiment, the ridge line s connecting the tips of the hair bundles 15a and 15b has a shape including the rear small mountain portion 21 that is substantially symmetrical with the small mountain portion 17 behind the large mountain portion 18. If the brushing angle of the toothbrush body with respect to the front teeth 22 is changed, the top portion 21a of the rear small ridge portion 21 can be inserted between the teeth, and further, the rear small ridge portion 21 is inserted into the interdental portion 22a of the front teeth 22. The bottom 20 of the valley between the upper tooth portion 18 and the large mountain portion 18 is disposed close to the corner portion of the smooth portion 22 b of the front tooth 22, and the hair ends of the hair bundle forming the ridge line 18 b of the large mountain portion 18 are the front teeth 22. Since the contact is made over a wide area of the smooth portion 22b, the inter-tooth portion 22a and the smooth portion 22b of the front tooth 22 can be efficiently brushed over a wide range at the same time as described above. .

さらに、本実施形態によれば、小山部１７の稜線１７ｂと大山部１８の稜線１８ｂとが湾曲凸面となっているので、小山部１７を構成する毛束の先端は歯間部２２ａにおける歯面に当接しやすくなり、大山部１８の稜線１８ｂを構成する毛束の先端は、前歯２２の平滑部２２ｂに当接する面積を増やすことができる。   Furthermore, according to this embodiment, since the ridge line 17b of the small mountain part 17 and the ridge line 18b of the large mountain part 18 are curved convex surfaces, the tip of the hair bundle constituting the small mountain part 17 is the tooth surface in the interdental part 22a. The tip of the hair bundle constituting the ridge line 18b of the large mountain portion 18 can be increased in contact with the smooth portion 22b of the front tooth 22.

図５（ａ），（ｂ）は、本発明の好ましい他の実施形態に係る歯ブラシ３０を示すものである。図５（ａ），（ｂ）に示す歯ブラシ３０では、植毛台１１の巾方向Ｙの長さが、後端側から先端に向けて徐々に小さくなった先細形状に形成され、植毛穴１３ａ、１３ｂの数が歯ブラシ１０よりも少ない。また、歯ブラシ３０は、ひし形毛束１５ａが植設される第１植毛穴１３ａ、及び円形毛束１５ｂが植設され第２植毛穴１３ｂは、１．７〜２．５ｍｍの同じ内径で形成されている。そして、植毛台１１の長手方向Ｘの先端部分の３箇所の第１植毛穴１３ａには、ひし形毛束１５ａが植設されている。これらのひし形毛束１５ａの後方の、３列合計１５箇所の第１植毛穴１３ａや第２植毛穴１３ｂには、中央列の先端側から１番目、３番目、及び４番目の第１植毛穴１３ａにひし形毛束１５ａが植設されており、その他の１２箇所の第２植毛穴１３ｂに円形毛束１５ｂが植設されている。   FIGS. 5A and 5B show a toothbrush 30 according to another preferred embodiment of the present invention. In the toothbrush 30 shown to Fig.5 (a), (b), the length of the width direction Y of the flocking base 11 is formed in the taper shape gradually decreased toward the front-end | tip from the rear end side, and the flocking hole 13a, The number of 13b is smaller than the toothbrush 10. In addition, the toothbrush 30 is formed with the same inner diameter of 1.7 to 2.5 mm, in which the first flocking hole 13a in which the rhombic bristles 15a are planted and the circular bristles 15b are planted. ing. And the rhomboid hair | bristle bundle 15a is planted in the three 1st flocking holes 13a of the front-end | tip part of the longitudinal direction X of the flocking table 11. FIG. The first flocking holes of the first, third, and fourth from the front end side of the center row are arranged in a total of 15 first flocking holes 13a and second flocking holes 13b in the rear of these rhombic hair bundles 15a. A rhombic hair bundle 15a is implanted in 13a, and a circular hair bundle 15b is implanted in the other 12 second hair implantation holes 13b.

さらに、図５（ａ），（ｂ）に示す歯ブラシ３０では、毛束１５ａ，１５ｂの先端（短手方向Ｙにおいて植毛台１１から最も高い毛束の先端）を結んだ稜線ｓが、植毛台１１の先端部分に配置される小山部１７と、小山部１７の後方に連続する稜線１８ｂを構成する大山部１８とを含んだ形状を備えている。そして、大山部１８の稜線１８ｂは、小山部１７よりも谷底部１９から頂部１８ａまでの傾きが小さく形成されている。さらに、小山部１７の頂部１７ａは大山部１８の頂部１８ａよりも高くなっており、小山部１７の頂部１７ａと大山部１８の頂部１８ａとを結んだ線分Ｌの長さが４．３〜９．２ｍｍ、谷底部１９から線分Ｌに降ろした垂線Ｄの長さが０．８〜１．６ｍｍとなっている。このような構成を有することにより、図５（ａ），（ｂ）に示す歯ブラシ３０は、上記実施形態の歯ブラシ１０と同様の作用効果を奏することになる。   Further, in the toothbrush 30 shown in FIGS. 5 (a) and 5 (b), the ridge line s connecting the tips of the hair bundles 15a and 15b (the tip of the highest hair bundle from the flock base 11 in the short direction Y) 11 is provided with a shape including a small mountain portion 17 disposed at a tip portion of the eleventh portion and a large mountain portion 18 constituting a ridge line 18b continuous behind the small mountain portion 17. The ridge line 18 b of the large mountain part 18 is formed with a smaller inclination from the valley bottom part 19 to the top part 18 a than the small mountain part 17. Further, the top portion 17a of the small mountain portion 17 is higher than the top portion 18a of the large mountain portion 18, and the length of the line segment L connecting the top portion 17a of the small mountain portion 17 and the top portion 18a of the large mountain portion 18 is 4.3 to 3. 9.2 mm, the length of the perpendicular D drawn from the valley bottom 19 to the line segment L is 0.8 to 1.6 mm. By having such a configuration, the toothbrush 30 shown in FIGS. 5A and 5B has the same operational effects as the toothbrush 10 of the above embodiment.

なお、本発明は、上記各実施形態に限定されることなく種々の変更が可能である。例えば、小山部や大山部の稜線は湾曲形状となっている必要は必ずしもなく、直線状の山型となっていても、頂点を挟んで一方側のみ直線状となっていても良い。また、大山部の後方に先端側の小山部と概ね対称形状の後方小山部が設けられている必要は必ずしも無く、後方小山部は、省略されていても、小山部と非対称の形状であっても良い。さらに、ブラシ部を構成する複数の毛束にひし形毛束が含まれている必要は必ずしもない。   The present invention can be variously modified without being limited to the above embodiments. For example, the ridgeline of the small mountain portion or the large mountain portion does not necessarily have a curved shape, and may be a straight mountain shape, or may be linear only on one side across the apex. Further, it is not always necessary to provide a rear hill part that is substantially symmetrical with the small hill part on the tip side behind the large hill part, and the rear hill part is asymmetrical with the hill part even if omitted. Also good. Furthermore, it is not always necessary that the plurality of hair bundles constituting the brush portion include a rhombus hair bundle.

以下、実施例及び比較例により、本発明の歯ブラシをさらに詳細に説明するが、本発明はこれらに限定されるものではない。   Hereinafter, although the toothbrush of this invention is demonstrated in detail by an Example and a comparative example, this invention is not limited to these.

〔実施例１，２〕
上記実施形態の歯ブラシ１０と同様の構成を有する歯ブラシを実施例１の歯ブラシとした。上記他の実施形態の歯ブラシ３０と同様の構成を有する歯ブラシを実施例２の歯ブラシとした。実施例１，２の歯ブラシについて、小山部の頂部と大山部の頂部とを結んだ線分Ｌを計測すると共に、谷底部から線分Ｌに降ろした垂線Ｄの長さを計測した。また、実施例１の歯ブラシのブラシ部の先端の毛先を、約２００ｇの刷掃圧力で、図６（ａ）に示すような状態で額模型モデルの前歯の部分に押し当てた際の、歯ブラシの側面視で歯の平滑面への当該平滑面に沿った毛先の接触長さを測定した。さらに、実施例２の歯ブラシのブラシ部先端の毛先を、約２００ｇの刷掃圧力で、図６（ｂ）に示すような状態で額模型モデルの前歯の部分に押し当てた際の、歯ブラシの側面視で歯の平滑面への当該平滑面に沿った毛先の接触長さを測定した。計測した線分Ｌ及び垂線Ｄの長さ、及び測定した接触長さを各々表１に示す。 Examples 1 and 2
A toothbrush having the same configuration as the toothbrush 10 of the above embodiment was used as the toothbrush of Example 1. A toothbrush having the same configuration as that of the toothbrush 30 of the other embodiment was used as the toothbrush of Example 2. About the toothbrush of Example 1, 2, while measuring the line segment L which tied the top part of the small mountain part, and the top part of the large mountain part, the length of the perpendicular line D dropped to the line segment L from the valley bottom part was measured. Further, when the tip of the brush part of the toothbrush of Example 1 is pressed against the front tooth part of the forehead model model in a state as shown in FIG. The contact length of the bristles along the smooth surface of the tooth was measured with a side view of the toothbrush. Furthermore, the toothbrush when the tip of the brush part of the toothbrush of Example 2 is pressed against the front tooth part of the forehead model in a state as shown in FIG. 6B with a brushing pressure of about 200 g. The contact length of the hair tip along the smooth surface to the smooth surface of the tooth was measured in a side view. Table 1 shows the measured lengths of the line segment L and the perpendicular line D, and the measured contact length.

〔比較例１〜４〕
図７（ａ）のようなブラシ部を側面から見た形状を有する市販品Ａを比較例１の歯ブラシとした。図８（ａ）のようなブラシ部を側面から見た形状を有する市販品Ｂを比較例２の歯ブラシとした。図９（ａ）のようなブラシ部を側面から見た形状を有する市販品Ｃを比較例３の歯ブラシとした。図１０（ａ）のようなブラシ部を側面から見た形状を有する市販品Ｄを比較例４の歯ブラシとした。 [Comparative Examples 1-4]
A commercial product A having the shape of the brush portion as viewed from the side as shown in FIG. A commercial product B having a shape of the brush portion as viewed from the side as shown in FIG. A commercial product C having a shape of the brush portion as seen from the side as shown in FIG. A commercial product D having a shape as seen from the side of the brush portion as shown in FIG.

比較例１〜４の各歯ブラシについて、ブラシ部の先端の山部の頂部とこれに後続する山部の頂部とを結んだ線分Ｌを測定すると共に、これらの山部間の谷底部から線分Ｌに降ろした垂線Ｄの長さを測定した。測定結果を表１に示す.   About each toothbrush of Comparative Examples 1-4, while measuring the line segment L which connected the peak part of the peak part of the front-end | tip of a brush part, and the peak part of the peak part which follows this, it is a line from the valley bottom part between these peak parts. The length of the perpendicular D dropped to the minute L was measured. The measurement results are shown in Table 1.

比較例１〜４についても、歯ブラシのブラシ部の先端の毛先を、約２００ｇの刷掃圧力で、各々図７（ｂ）、図８（ｂ）、図９（ｂ）、図１０（ｂ）に示す状態で額模型モデルの前歯部分に押し当てた際の、歯ブラシの側面視で歯の平滑面への当該平滑面に沿った毛束の接触長さを計測した。   Also in Comparative Examples 1 to 4, the tip of the brush portion of the toothbrush is applied with a brushing pressure of about 200 g, respectively, in FIGS. 7B, 8B, 9B, and 10B. The contact length of the hair bundle along the smooth surface of the tooth was measured in a side view of the toothbrush when pressed against the front tooth part of the forehead model in the state shown in FIG.

比較例１〜４の各歯ブラシについて、上記モデルにおいてブラシ部先端の毛先が前歯の平滑面に接触した長さの計測結果を表１に示す。   For each toothbrush of Comparative Examples 1 to 4, Table 1 shows the measurement results of the length in which the tip of the brush portion contacts the smooth surface of the front tooth in the above model.

図６（ａ）、図６（ｂ）、図７（ｂ）、図８（ｂ）、図９（ｂ）、図１０（ｂ）に示す、実施例１，２及び比較例１〜４の歯ブラシの、ブラシ部の前歯の平滑面への接触状況、及び表１に示す接触長さの計測結果によれば、本発明にかかる実施例１，２の歯ブラシは、歯面の歯間部から平滑部に亘って前歯の平滑部との間に大きな空隙を生じることなく、比較例１〜４の歯ブラシと比較して、前歯の歯面の平滑部と相当の大きさの接触領域を保持できることが判明した。   6 (a), FIG. 6 (b), FIG. 7 (b), FIG. 8 (b), FIG. 9 (b), and FIG. According to the contact state of the toothbrush with the smooth surface of the front teeth of the brush portion and the measurement result of the contact length shown in Table 1, the toothbrushes of Examples 1 and 2 according to the present invention are from the interdental portion of the tooth surface. Compared with the toothbrushes of Comparative Examples 1 to 4 without causing a large gap between the smooth part and the smooth part of the front tooth, the smooth part of the tooth surface of the front tooth and a contact area of a considerable size can be retained. There was found.

〔比較例５、実施例３〕
比較例５の歯ブラシを図１１に、実施例３の歯ブラシを図１２に示す。比較例５、実施例３の歯ブラシは、図１１（ａ）、図１２（ａ）に示すように、実施例１と同じように植毛台１１に植毛穴１３ａ、１３ｂが開口形成されている。比較例５の歯ブラシは、実施例１と同じように第１植毛穴１３ａにはひし形毛束１５ａが植設され、第２植毛穴１３ｂには円形毛束１５ｂが植設されているが、図１１（ｂ）に示すように、ブラシ部を側面からみた形状は、毛束１５ａ、１５ｂの植毛台からの高さが概ね均一で平切り形状である。実施例３の歯ブラシは、図１２（ｂ）に示すように、ブラシ部側面からみた形状は実施例１の歯ブラシと同じであるが、図１２（ａ）に示すように、植毛穴１３ａと植毛穴１３ｂのいずれにもひし形毛束１５ａが植設されている。尚、比較例５、実施例３の植毛穴１３ａの径は１．８ｍｍ、植毛穴１３ｂの径は１．６ｍｍで形成されている。
また、以下の歯垢又は汚れ除去の評価、使用感の評価において、実施例１の歯ブラシは、植毛穴１３ａの径を１．８ｍｍ、植毛穴１３ｂの径を１．６ｍｍのものを用いた。
そして、実施例１、実施例３、比較例５の歯ブラシの最も外周側にある植毛穴の外縁を結んだ植毛総面積は、１３７．４ｍｍ²であって、植毛穴の面積の総和は４５．９ｍｍ²であった。 [Comparative Example 5, Example 3]
The toothbrush of the comparative example 5 is shown in FIG. 11, and the toothbrush of the example 3 is shown in FIG. In the toothbrushes of Comparative Example 5 and Example 3, as shown in FIGS. 11A and 12A, flocking holes 13 a and 13 b are formed in the flocking table 11 in the same manner as in Example 1. In the toothbrush of the comparative example 5, the rhombic hair bundle 15a is implanted in the first flocking hole 13a and the circular flock 15b is implanted in the second flocking hole 13b as in the first embodiment. As shown in FIG. 11 (b), the shape of the brush portion viewed from the side is generally flat and the height of the hair bundles 15a and 15b from the flocking table is uniform. As shown in FIG. 12B, the toothbrush of Example 3 has the same shape as the toothbrush of Example 1 as seen from the side of the brush part. However, as shown in FIG. A rhombus 15a is implanted in each of the pores 13b. In addition, the diameter of the flock hole 13a of the comparative example 5 and Example 3 is 1.8 mm, and the diameter of the flock hole 13b is 1.6 mm.
Moreover, in the following evaluation of plaque or dirt removal and evaluation of the feeling of use, the toothbrush of Example 1 was used with a diameter of the flock hole 13a of 1.8 mm and a diameter of the flock hole 13b of 1.6 mm.
And the total area of the flocking which connected the outer edge of the flocking hole in the outermost peripheral side of the toothbrush of Example 1, Example 3, and the comparative example 5 is 137.4 mm < ² >, Comprising: The sum total of the area of a flocking hole is 45. It was 9 mm ² .

実施例１、３及び比較例５の歯ブラシを用いて、歯垢又は汚れ除去効果を評価するために、以下の評価モデルにより評価した。歯垢または汚れ除去の評価モデルを以下に示す。
（方法）
（１）図１３（ａ）に示すように、角部にＲ（曲率半径）が２．５ｍｍの曲面を備える角型のアルミブロックの曲面同士を向き合わせて並置した歯モデルを作成する。
（２）（１）の歯モデルの歯面の歯垢又は着色汚れモデルとして、ビデオテープ（西友プライベートブランドの「Ｓ‘ＲＩＢＢＯＮ」スタンダードタイプ（１２０分、型番３Ｔ１２０ＳＲ））を取り付け、これをビデオテープ磁性層とする。
（３）作成した着色汚れモデルを取り付けた歯モデル（アルミブロック）を試験台に装着し、ブラッシングマシーンを用い、各歯ブラシによる刷掃を行う（図１３（ａ））。
（４）刷掃条件は、荷重３００ｇ、振幅３０ｍｍ、速度１２０ｒｐｍ、刷掃回数１２０（往復）として、歯磨剤０．５ｇ（クリアクリーンプラスホワイトニング（花王製））を使用した。
（５）歯モデルの評価領域は、図１３（ｂ）に示すように、歯間部（アルミブロックのＲが形成された領域）を除く歯間部を挟んだ両側の平滑面の領域とし、この評価領域においてビデオテープ磁性層の磁性層が剥がれてテープのベースが露出した（白くなった）部分の面積（ｍｍ²）を画像解析により算出し、汚れ除去面積とした。 In order to evaluate the plaque or dirt removal effect using the toothbrushes of Examples 1 and 3 and Comparative Example 5, evaluation was performed according to the following evaluation model. An evaluation model for removing plaque or dirt is shown below.
(Method)
(1) As shown in FIG. 13A, a tooth model is created in which curved surfaces of rectangular aluminum blocks each having a curved surface having a radius of curvature R of 2.5 mm face each other.
(2) Video tape (Seiyu private brand “S'RIBBON” standard type (120 minutes, model number 3T120SR)) is attached as a dental plaque or colored stain model of the tooth model of (1), and this is a video tape. The magnetic layer.
(3) A tooth model (aluminum block) to which the prepared colored dirt model is attached is mounted on a test stand, and brushing is performed with each toothbrush using a brushing machine (FIG. 13 (a)).
(4) The brushing conditions were a load of 300 g, an amplitude of 30 mm, a speed of 120 rpm, and a brushing frequency of 120 (reciprocating), using 0.5 g of dentifrice (Clear Clean Plus Whitening (manufactured by Kao)).
(5) As shown in FIG. 13 (b), the evaluation area of the tooth model is a smooth surface area on both sides sandwiching the interdental portion excluding the interdental portion (region where the aluminum block R is formed), In this evaluation area, the area (mm ² ) of the portion where the magnetic layer of the video tape magnetic layer was peeled and the base of the tape was exposed (whitened) was calculated by image analysis and used as a stain removal area.

（結果）
実施例１、３、比較例５の歯ブラシについて行った汚れ除去効果の評価結果を表２に示す。表２には、各歯ブラシの評価モデルによる刷掃後の磁性層の写真と、汚れ除去面積、及び比較例５の歯ブラシによる汚れ除去面積を１００％としたときの、実施例１、３の歯ブラシによる汚れ除去面積の相対評価を示した。さらに、表２には、女性３名の被験者による使用感も併せて示した。 (result)
Table 2 shows the evaluation results of the dirt removal effect performed on the toothbrushes of Examples 1 and 3 and Comparative Example 5. Table 2 shows the toothbrushes of Examples 1 and 3 when the photograph of the magnetic layer after the brushing by the evaluation model of each toothbrush, the dirt removal area, and the dirt removal area by the toothbrush of Comparative Example 5 are 100%. The relative evaluation of the soil removal area was shown. Further, Table 2 also shows the feeling of use by three female subjects.

表２から明らかなように、比較例５の平切りの歯ブラシでは、歯間に歯ブラシが届き難いだけでなく、汚れ除去面積も小さく、同じ高さの毛束が全体として歯面、特に平滑部に突っ張るため、使用感はやや硬い磨き心地という評価であった。
実施例１、３のように本願発明の毛束先端の稜線形状を備える歯ブラシでは、比較例５のような毛束の高さが概ね均一な平切り形状に比べて、実施例１は約２．４倍、実施例３は約１．８倍の高い汚れ除去面積の結果が得られた。一方、実施例３のように、毛束の全てがひし形毛束である歯ブラシでは、汚れ除去面積は大きいが、実施例１に比べて剛性感があり、使用感では毛先が硬く感じられる評価であった。従って、実施例１は、実施例３よりもさらに歯垢又は汚れ除去の効果が高く、使用感においても高い評価を得た。 As is clear from Table 2, in the flat-cut toothbrush of Comparative Example 5, not only the toothbrush is difficult to reach between the teeth, but also the dirt removal area is small, and the hair bundle of the same height as a whole is a tooth surface, particularly a smooth portion. The feeling of use was evaluated as a somewhat hard polishing feeling.
In the toothbrush having the ridge shape at the tip of the hair bundle of the present invention as in Examples 1 and 3, Example 1 is about 2 compared to the flat cut shape in which the height of the hair bundle is substantially uniform as in Comparative Example 5. As a result, the result of the dirt removal area was about 1.8 times as high as that of Example 3. On the other hand, in the toothbrush in which all of the hair bundles are diamond-shaped hair bundles as in Example 3, the dirt removal area is large, but there is a feeling of rigidity compared to Example 1, and the hair tip feels hard when used. Met. Therefore, Example 1 has a higher effect of removing plaque or dirt than Example 3, and also has a high evaluation in use feeling.

本発明の好ましい一実施形態に係る歯ブラシの要部の構成を説明する、（ａ）は平面図、（ｂ）は側面図である。The structure of the principal part of the toothbrush which concerns on preferable one Embodiment of this invention is demonstrated, (a) is a top view, (b) is a side view. 本発明の好ましい一実施形態に係る歯ブラシのブラシ部の先端部分の拡大側面図である。It is an enlarged side view of the front-end | tip part of the brush part of the toothbrush which concerns on preferable one Embodiment of this invention. （ａ）はひし形断面ブリッスルの説明図、（ｂ）は円形断面ブリッスルの説明図である。(A) is explanatory drawing of a rhombus cross-section bristle, (b) is explanatory drawing of a circular cross-section bristle. 本発明の好ましい一実施形態に係る歯ブラシを用いて前歯をブラッシングする状況の説明図である。It is explanatory drawing of the condition which brushes a front tooth using the toothbrush which concerns on preferable one Embodiment of this invention. 本発明の好ましい他の実施形態に係る歯ブラシの要部の構成を説明する、（ａ）は平面図、（ｂ）は側面図である。The structure of the principal part of the toothbrush which concerns on other preferable embodiment of this invention is demonstrated, (a) is a top view, (b) is a side view. （ａ）は実施例１の歯ブラシを用いて前歯をブラッシングする状況の説明図、（ｂ）は実施例２の歯ブラシを用いて前歯をブラッシングする状況の説明図である。(A) is explanatory drawing of the condition which brushes the front tooth using the toothbrush of Example 1, (b) is explanatory drawing of the condition which brushes the front tooth using the toothbrush of Example 2. FIG. （ａ）は比較例１の歯ブラシのブラシ部の側面図、（ｂ）は比較例１の歯ブラシを用いて前歯をブラッシングする状況の説明図である。(A) is a side view of the brush part of the toothbrush of the comparative example 1, (b) is explanatory drawing of the condition which brushes a front tooth using the toothbrush of the comparative example 1. FIG. （ａ）は比較例２の歯ブラシのブラシ部の側面図、（ｂ）は比較例２の歯ブラシを用いて前歯をブラッシングする状況の説明図である。(A) is a side view of the brush part of the toothbrush of the comparative example 2, (b) is explanatory drawing of the condition which brushes a front tooth using the toothbrush of the comparative example 2. FIG. （ａ）は比較例３の歯ブラシのブラシ部の側面図、（ｂ）は比較例３の歯ブラシを用いて前歯をブラッシングする状況の説明図である。(A) is a side view of the brush part of the toothbrush of the comparative example 3, (b) is explanatory drawing of the condition which brushes a front tooth using the toothbrush of the comparative example 3. FIG. （ａ）は比較例４の歯ブラシのブラシ部の側面図、（ｂ）は比較例４の歯ブラシを用いて前歯をブラッシングする状況の説明図である。(A) is a side view of the brush part of the toothbrush of the comparative example 4, (b) is explanatory drawing of the condition which brushes a front tooth using the toothbrush of the comparative example 4. FIG. （ａ）は比較例５の歯ブラシのブラシ部の平面図、（ｂ）は側面図である。(A) is a top view of the brush part of the toothbrush of the comparative example 5, (b) is a side view. （ａ）は実施例３の歯ブラシのブラシ部の平面図、（ｂ）は側面図である。(A) is a top view of the brush part of the toothbrush of Example 3, (b) is a side view. （ａ）は着色汚れモデルを取り付けた歯モデルの説明図、（ｂ）は歯モデルの評価領域の説明図である。(A) is explanatory drawing of the tooth model which attached the colored dirt model, (b) is explanatory drawing of the evaluation area | region of a tooth model.

符号の説明Explanation of symbols

１０，３０ 歯ブラシ
１１ 植毛台
１２ 首部
１３ａ 第１植毛穴
１３ｂ 第２植毛穴
１４ａ ひし形断面ブリッスル
１４ｂ 円形断面ブリッスル
１５ａ ひし形毛束
１５ｂ 円形毛束
１６ ブラシ部
１７ 小山部
１７ａ 小山部の頂部
１７ｂ 小山部の稜線
１８ 大山部
１８ａ 大山部の頂部
１８ｂ 大山部の稜線
１９，２０ 谷底部
２１ 後方小山部
２１ａ 後方小山部の頂部
２１ｂ 後方小山部の稜線
２２ 前歯
２２ａ 前歯の歯面の歯間部
２２ｂ 前歯の歯面の平滑部
ｓ 毛束の先端を結んだ稜線
Ｘ ブラシ部の長手方向
Ｙ ブラシ部の巾方向
Ｌ 小山部の頂部と大山部の頂部とを結んだ線分
Ｌ１ 小山部のブラシ部長手方向の長さ
Ｌ２ 大山部のブラシ部長手方向の長さ
Ｄ 谷底部から線分Ｌに降ろした垂線の長さ 10, 30 toothbrush 11 flocking table 12 neck 13a first flocking hole 13b second flocking hole 14a rhombus cross-section bristle 14b circular cross-section bristle 15a rhombus bristles 15b circular flock 16 brush part 17 mound part 17a crest part 17b mound part Ridge line 18 Large mountain part 18a Large mountain part top part 18b Large mountain part ridge line 19, 20 Valley bottom part 21 Rear small mountain part 21a Rear small mountain part top part 21b Rear small mountain part ridge line 22 Front tooth 22a Interdental part 22b of front tooth surface Interdental part 22b Front tooth Smooth portion s of the surface ridge line X connecting the tips of the hair bundle Longitudinal direction Y of the brush portion L width direction L of the brush portion Line segment L1 connecting the top portion of the ridge portion and the top portion of the ridge portion In the longitudinal direction of the brush portion of the ridge portion Length L2 Long length D of the brush portion in the Oyama portion Length of the perpendicular line dropped from the bottom of the valley to the line segment L

Claims (6)

植毛台に植毛された複数の毛束からなるブラシ部を有する歯ブラシであって、
該ブラシ部を側面から見たときに、毛束の先端を結んだ稜線が、ブラシ部の長手方向の先端部分に配置される小山部と、谷底部を挟んで前記小山部の後方に連続し前記小山部よりもブラシ部の長手方向長さの長い大山部とを含む形状を備え、
前記大山部は、前記小山部との間の谷底部から頂部まで植毛台からの高さが徐々に高く形成され、
前記小山部の頂部の植毛台からの高さが、前記大山部の頂部の植毛台からの高さよりも高く、
前記小山部の頂部と前記大山部の頂部とを結んだ線分の長さが４．３〜９．２ｍｍであり、前記谷底部から前記小山部の頂部と前記大山部の頂部とを結んだ線分に降ろした垂線の長さが０．８〜１．６ｍｍである歯ブラシ。 A toothbrush having a brush portion composed of a plurality of hair bundles planted on a flocking table,
When the brush portion is viewed from the side, the ridge line connecting the tips of the hair bundles is continuous with the small ridges arranged at the tip portions of the brush portions in the longitudinal direction and the rear of the small ridges across the valley bottom. A shape including a large mountain portion having a longer length in the longitudinal direction of the brush portion than the small mountain portion,
The large mountain part is formed so that the height from the flocking table is gradually increased from the bottom to the top between the small mountain part,
The height from the flocking table at the top of the mountain is higher than the height from the flocking table at the top of the mountain.
The length of the line segment connecting the top of the small mountain part and the top of the large mountain part is 4.3 to 9.2 mm, and the top of the small mountain part and the top of the large mountain part are connected from the bottom of the valley. Toothbrush whose length of perpendicular line dropped on a line segment is 0.8 to 1.6 mm. 前記小山部と前記大山部は、前記谷底部を挟んだ領域において外側に凸の湾曲した形状を備えている請求項１記載の歯ブラシ。   The toothbrush according to claim 1, wherein the small mountain portion and the large mountain portion have a curved shape that protrudes outward in a region sandwiching the valley bottom. 前記毛束の先端を結んだ稜線が、前記大山部の後方に谷底部を挟んで連続し、前記小山部と略対称形状の後方小山部を含んだ形状を備える請求項１又は２に記載の歯ブラシ。   The ridge line connecting the tips of the hair bundles has a shape including a rear small mountain part that is continuous with the valley bottom part behind the large mountain part and includes a rear small mountain part that is substantially symmetrical to the small mountain part. toothbrush. 前記小山部の頂部の植毛台からの高さが、前記大山部の頂部の植毛台からの高さよりも０．２〜２．０ｍｍ高い請求項１〜３のいずれかに記載の歯ブラシ。   The toothbrush in any one of Claims 1-3 in which the height from the flocking table of the top part of the said small mountain part is 0.2-2.0 mm higher than the height from the flocking table of the top part of the said large mountain part. 前記小山部の前記ブラシ部の長手方向長さが、４．３〜４．７ｍｍである請求項１〜４のいずれかに記載の歯ブラシ。   The toothbrush according to any one of claims 1 to 4, wherein a length in a longitudinal direction of the brush portion of the small mountain portion is 4.3 to 4.7 mm. 前記複数の毛束が、ひし形断面ブリッスルを束ねたひし形毛束を含む請求項１〜５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 the plurality of bristle bundles include a rhombus bristle bundle obtained by bundling rhombic cross-section bristles.

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