JP4628394B2 - toothbrush - Google Patents

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JP4628394B2
JP4628394B2 JP2007118096A JP2007118096A JP4628394B2 JP 4628394 B2 JP4628394 B2 JP 4628394B2 JP 2007118096 A JP2007118096 A JP 2007118096A JP 2007118096 A JP2007118096 A JP 2007118096A JP 4628394 B2 JP4628394 B2 JP 4628394B2
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resin
flocked
base
toothbrush
handle
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JP2007190439A (en
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充幸 久保
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Kao Corp
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Description

本発明は、複数の毛束が植毛される植毛部と、手で把持するハンドル部と、ハンドル部と植毛部とを連結する首部とからなる歯ブラシに関する。   The present invention relates to a toothbrush comprising a flocked portion in which a plurality of hair bundles are flocked, a handle portion gripped by hand, and a neck portion connecting the handle portion and the flocked portion.

歯ブラシは、複数の毛束が植毛される植毛部と、手で把持するハンドル部と、ハンドル部と植毛部とを連結する首部とによって構成されている。また歯ブラシは、樹脂を用いて植毛部と首部とハンドル部とを一体として成形することが、強度や成形性等の点で好ましい。一方、例えば植毛部の材料としては、毛束を植毛する際に打ち込まれる平線によって割れが生じるのを回避でき、且つアルコールや歯磨剤に含まれる香料等の薬品類の影響を受けず強度の低下を生じない物性を備える材料を選定する必要がある。また例えば首部の材料としては、歯磨き時に植毛部を押し付ける際のモーメント力による曲げ応力を繰り返し受けても、疲労による破損を生じない物性を備える材料を選定する必要がある。   The toothbrush is constituted by a flocked portion where a plurality of hair bundles are flocked, a handle portion gripped by a hand, and a neck portion connecting the handle portion and the flocked portion. Moreover, it is preferable that the toothbrush is formed by integrally molding the flocked portion, the neck portion, and the handle portion using a resin in terms of strength, moldability, and the like. On the other hand, for example, as the material of the hair transplantation part, it is possible to avoid the occurrence of cracking due to the flat wire driven when the hair bundle is implanted, and it is strong without being affected by chemicals such as fragrances contained in alcohol and dentifrice. It is necessary to select a material having physical properties that do not cause deterioration. In addition, for example, as a material for the neck portion, it is necessary to select a material having physical properties that do not cause damage due to fatigue even if the bending stress due to the moment force when pressing the flocked portion during tooth brushing is repeatedly received.

したがって、従来の歯ブラシは、これらの条件を満足できるように、ポリプロピレン等のポリオレフィン系の樹脂を用いて、植毛部と首部とハンドル部とを一体として成形していたが、これらの樹脂は不透明な樹脂であることから、意匠性が低く、歯ブラシに趣に富んだ美観を付与することが困難だった。また、意匠性を向上させるべく、ハンドル部に印刷等によって絵や模様を施したり、着色されたエラストマーを把持性の向上を兼ねてハンドル部に取り付けた歯ブラシも見受けられるが、これらによっても透明感は得られないため、意匠性の向上には限界があった。   Therefore, in the conventional toothbrush, the flocked portion, the neck portion, and the handle portion are integrally molded using a polyolefin-based resin such as polypropylene so that these conditions can be satisfied. However, these resins are opaque. Since it is a resin, it has a low designability, and it has been difficult to impart a tasteful aesthetic to the toothbrush. In addition, toothbrushes with a handle such as painting or patterning on the handle part or a colored elastomer attached to the handle part to improve gripping are also seen to improve the design. Therefore, there is a limit to the improvement in design properties.

これに対し、飽和ポリエステル、アクリロニトリルスチレン樹脂、セルロースアセテート等の透明性の高い樹脂を用いて植毛部と首部とハンドル部とを一体として成形した歯ブラシが市販されている。このような歯ブラシは、透明な樹脂を用いていることにより、その透明感による意匠性に優れる一方で、これらの樹脂は繰り返し応力に弱く、使用中に首部が折れやすい。また、アルコールや歯磨剤に含まれる香料等の薬品類の影響を受けてその強度が低下しやすいことも知られており、使用中に歯ブラシの植毛部が割れてしまう場合がある。   In contrast, toothbrushes in which a flocked portion, a neck portion, and a handle portion are integrally formed using a highly transparent resin such as saturated polyester, acrylonitrile styrene resin, and cellulose acetate are commercially available. Such toothbrushes are excellent in design due to their transparency due to the use of a transparent resin, while these resins are vulnerable to repeated stresses and the neck is easily broken during use. Moreover, it is also known that the intensity | strength falls easily under the influence of chemicals, such as a fragrance | flavor contained in alcohol or a dentifrice, and the flocked part of a toothbrush may be broken during use.

本発明は、透明感による意匠性の向上を容易に図ることができると共に、薬品類に対する抵抗性や繰り返し応力に対する耐疲労性に優れた歯ブラシを提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a toothbrush that can easily improve design properties due to a sense of transparency and that is excellent in resistance to chemicals and fatigue resistance against repeated stress.

本発明は、複数の毛束が植毛される植毛部と、手で把持するハンドル部と、植毛部とハンドル部とを連結する首部とからなる歯ブラシにおいて、前記植毛部及び前記首部と共に前記ハンドル部の基台はポリオレフィン系樹脂を用いて成形されており、且つ、前記ハンドル部の基台に設けられた開口穴又は溝に光透過率（ＪＩＳ Ｋ ７１０５に規定された光線透過率試験方法によって測定された光透過率）が７０％以上の樹脂が前記ハンドル部の表面に表出するように埋めこまれて成形されており、前記開口穴又は溝は、前記光透過率７０％以上の樹脂が前記ハンドル部の基台を構成する樹脂に周方向を囲まれる周壁を有す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 relates to a toothbrush comprising a flocked portion in which a plurality of hair bundles are flocked, a handle portion to be gripped by hand, and a neck portion connecting the flocked portion and the handle portion, and the handle portion together with the flocked portion and the neck portion. The base is molded using a polyolefin resin, and the light transmittance (measured by the light transmittance test method defined in JIS K 7105) is measured in the opening hole or groove provided in the base of the handle portion. The resin having a light transmittance of 70% or more is embedded and molded so as to be exposed on the surface of the handle portion, and the opening hole or groove is formed of a resin having the light transmittance of 70% or more. The object is achieved by providing a toothbrush having a peripheral wall surrounded by a resin constituting the base of the handle portion in the circumferential direction .

上記記載におけるハンドル部の基台は、植毛部及び首部と同じ樹脂を用いてこれらと一体として成形され、ハンドル部の主体となって強度を発揮する部分であって、歯ブラシの首部から少なくとも手で把持する長さの全長に亘って連続して設けられる。   The handle base in the above description is a part that is molded integrally with these using the same resin as the flocked part and the neck part, and is a part that exhibits strength as a main part of the handle part, and is at least manually from the neck part of the toothbrush. It is provided continuously over the entire length of the gripping length.

本発明の歯ブラシによれば、透明感によるの意匠性の向上を容易に図ることができると共に、薬品類に対する抵抗性や繰り返し応力に対する耐疲労性に優れている。   According to the toothbrush of the present invention, it is possible to easily improve the design property due to the transparency, and it is excellent in resistance to chemicals and fatigue resistance against repeated stress.

本発明の好ましい第１実施形態に係る歯ブラシ１０は、図１（ａ）及び（ｂ）に示すように、複数の毛束１４が植毛される植毛部１１と、手で把持するハンドル部１２と、植毛部１１とハンドル部１２とを連結する首部１３とからなる。そして、植毛部１１、首部１３、及びハンドル部１２の基台１５は、例えば光透過率が３０％以下の不透明樹脂１６を用いて一体として成形されており、且つハンドル部１２の基台１５には、光透過率が７０％以上の透明性の高い透明樹脂１７（半透明の樹脂も含む。）が埋め込まれて、ハンドル部１２の表面に表出している。   As shown in FIGS. 1A and 1B, a toothbrush 10 according to a first preferred embodiment of the present invention includes a flocked portion 11 into which a plurality of hair bundles 14 are flocked, a handle portion 12 that is gripped by hand. The neck portion 13 connects the flocked portion 11 and the handle portion 12. The base 15 of the flocked part 11, the neck part 13, and the handle part 12 is integrally formed using, for example, an opaque resin 16 having a light transmittance of 30% or less, and is formed on the base 15 of the handle part 12. Is embedded in the transparent resin 17 (including translucent resin) having a light transmittance of 70% or higher and exposed on the surface of the handle portion 12.

また、本第１実施形態によれば、ハンドル部１２の基台１５には、ハンドル部１２の表裏を貫通して形成された、ハンドル部３２の基台３５を構成する樹脂に周方向を囲まれる周壁を有する開口穴１８が設けられており、この開口穴１８を充填するようにして、上記光透過率が70％以上の透明樹脂１７が基台１５に埋め込まれている。 Further, according to the first embodiment, the base 15 of the handle portion 12 is surrounded by the resin constituting the base 35 of the handle portion 32 formed through the front and back of the handle portion 12 in the circumferential direction. An opening hole 18 having a peripheral wall is provided, and the transparent resin 17 having a light transmittance of 70% or more is embedded in the base 15 so as to fill the opening hole 18.

植毛台１１は、複数のブリッスルを束ねて構成される毛束１４が複数植毛される部分であって、本第１実施形態によれば、植毛台１１に形成された複数の植毛穴に、例えば平線を打ち込む方法によって、毛束１４が各々植毛されている。また、植毛台１１は、歯磨き時に歯磨剤が毛束１４に塗布され、口腔内に差し込まれて刷掃を行う部分であって、歯磨剤に含まれる香料等の薬品類に対する抵抗性を備えている必要がある。   The flocking table 11 is a portion where a plurality of hair bundles 14 formed by bundling a plurality of bristles are flocked. According to the first embodiment, a plurality of flocked holes formed on the flocking table 11 are, for example, Each hair bundle 14 is implanted by a method of driving a flat wire. Further, the flocking table 11 is a portion where a dentifrice is applied to the hair bundle 14 at the time of brushing and inserted into the oral cavity for cleaning, and has resistance to chemicals such as fragrances contained in the dentifrice. Need to be.

ハンドル部１２は、細長い長円形の平断面形状を有する開口穴１８を内側に備え、環状に形成された基台１５と、開口穴１８に埋め込まれる透明樹脂１７とからなり、基台１５は、透明樹脂１７の周囲を囲むようにして歯ブラシ１０の首部１３からハンドル部１２の全長に亘って連続して設けられ、ハンドル部１２の主体となって当該ハンドル部１２の強度を発揮する部分である。   The handle portion 12 includes an opening hole 18 having an elongated oval flat cross-sectional shape inside, and includes a base 15 formed in an annular shape and a transparent resin 17 embedded in the opening hole 18. The portion that is provided continuously from the neck portion 13 of the toothbrush 10 to the entire length of the handle portion 12 so as to surround the transparent resin 17, and serves as a main body of the handle portion 12 and exhibits the strength of the handle portion 12.

首部１３は、植毛部１１とハンドル部１２との間に介在し、歯磨き時に植毛部１１を歯面等に押し付ける際の荷重を、ハンドル部１２によって支持させるべく当該ハンドル部１２に伝達するための部分であって、モーメント力による曲げ応力を繰り返し受けても、疲労による破損を生じない耐疲労性を備えている必要がある。   The neck portion 13 is interposed between the flocked portion 11 and the handle portion 12, and transmits the load when pressing the flocked portion 11 against the tooth surface or the like when brushing the teeth to be supported by the handle portion 12. It is necessary to have fatigue resistance that does not cause breakage due to fatigue even if it is subjected to bending stress due to moment force repeatedly.

本第１実施形態によれば、これらの抵抗性や耐疲労性等の物性及び効率の良い成形性等を鑑みて、植毛台１１、首部１３、及びハンドル部１２の基台１５は、不透明樹脂１６を用いて一体として成形される。ここで、不透明樹脂１６としては、例えば、安価で汎用的な樹脂である、ポリプロピレン等のポリオレフィン系の樹脂を用いることが好ましいが、耐薬品性や繰り返しの曲げに対する耐疲労性を備えていれば材質は問わない。また、一部のポリプロピレンや低密度のポリエチレンのように若干の透明性を帯びていても前述の物性を持っていればかまわない。   According to the first embodiment, in view of these physical properties such as resistance and fatigue resistance and efficient moldability, the flocking table 11, the neck portion 13, and the base 15 of the handle portion 12 are made of an opaque resin. 16 is integrally molded. Here, as the opaque resin 16, for example, it is preferable to use a polyolefin-based resin such as polypropylene, which is an inexpensive and general-purpose resin, as long as it has chemical resistance and fatigue resistance against repeated bending. Any material is acceptable. Moreover, even if it has some transparency like some polypropylene and low density polyethylene, it does not matter as long as it has the above-mentioned physical properties.

また、本第１実施形態によれば、ハンドル部１２の開口穴１８を充填するように埋め込まれる光透過率が70％以上の透明樹脂１７としては、ポリエチレンテレフタレート、ポリブチレンテレフタレート等の飽和ポリエステル系の樹脂やスチレン−ブタジエン共重合体ゴム、プロピレンゴム等のポリスチレン系又はポリオレフィン系のエラストマーを用いることが好ましい。またアクリロニトリルスチレン樹脂、セルロースアセテート、メタクリル樹脂等を用いることもできる。   Further, according to the first embodiment, the transparent resin 17 having a light transmittance of 70% or more embedded so as to fill the opening hole 18 of the handle portion 12 is a saturated polyester type such as polyethylene terephthalate or polybutylene terephthalate. It is preferable to use polystyrene-type or polyolefin-type elastomers such as these resins, styrene-butadiene copolymer rubber, and propylene rubber. Further, acrylonitrile styrene resin, cellulose acetate, methacrylic resin, or the like can be used.

なお、光透過率が７０％以上の透明樹脂１７は、意匠性を向上させるため、適宜の色に着色して用いることが好ましい。また、透明樹脂１７として、着色前における光透過率が８５％以上の樹脂を用いることが、透明感による意匠性の向上を効果的に高めるために特に好ましい。また、埋め込まれる透明樹脂１７の厚みについては、光線透過率８５％以上の樹脂であれば５ｍｍ〜１５ｍｍ程度が好ましい。５ｍｍ以下であるとハンドルの剛性が低くなり、１５ｍｍ以上であると透明性が劣ると共に成型も難しくなるばかりか、使用する際に持ちにくくなる。光線透過率が７５％以上８５％未満の場合は厚みは５ｍｍから１０ｍｍが好ましい。   The transparent resin 17 having a light transmittance of 70% or more is preferably used by coloring it in an appropriate color in order to improve the design. In addition, it is particularly preferable to use a resin having a light transmittance of 85% or more before coloring as the transparent resin 17 in order to effectively enhance the design property due to the transparency. Further, the thickness of the transparent resin 17 to be embedded is preferably about 5 mm to 15 mm if the resin has a light transmittance of 85% or more. If it is 5 mm or less, the rigidity of the handle becomes low, and if it is 15 mm or more, the transparency is inferior and the molding becomes difficult, and it becomes difficult to hold it during use. When the light transmittance is 75% or more and less than 85%, the thickness is preferably 5 mm to 10 mm.

本第１実施形態によれば、開口穴１８を充填するようにして透明樹脂１７をハンドル部１２の基台１５に埋め込む方法としては、例えば植毛部１１及び首部１３と共にハンドル部１２の基台１５を不透明樹脂１６により成形した後、開口穴１８に透明樹脂１７をインサート成形によって成形して埋め込む方法を採用することができる。また開口穴１８に相当する大きさ、形状に透明樹脂１７を成形した後、透明樹脂１７を基台１５の内側に巻き込むようにしつつ、植毛部１１、首部１３、及びハンドル部１２の基台１５を不透明樹脂１６により成形する方法を採用することもできる。後者の方法では、不透明樹脂１６の硬化時の収縮を利用し、かしめるようにして透明樹脂１７を埋め込むことにより、不透明樹脂１６と透明樹脂１７の接着性が悪い場合でも、開口穴１８に透明樹脂１７を隙間なく充填させて基台１５と透明樹脂１７とを強固に接着させることが可能になる。 According to the first embodiment, as a method of embedding the transparent resin 17 in the base 15 of the handle portion 12 so as to fill the opening hole 18, for example, the base 15 of the handle portion 12 together with the flocked portion 11 and the neck portion 13. After molding with the opaque resin 16, a method of embedding the transparent resin 17 in the opening hole 18 by insert molding can be employed. In addition, after forming the transparent resin 17 in a size and shape corresponding to the opening hole 18, the base 15 of the flocked portion 11, the neck portion 13, and the handle portion 12 while the transparent resin 17 is wound inside the base 15. It is also possible to adopt a method of molding the resin with the opaque resin 16. In the latter method, the transparent resin 17 is embedded by caulking by using the shrinkage of the opaque resin 16 when it is cured, so that even if the adhesion between the opaque resin 16 and the transparent resin 17 is poor, the opening hole 18 is transparent. The base 17 and the transparent resin 17 can be firmly bonded by filling the resin 17 without a gap .

そして、本第１実施形態の歯ブラシ１０によれば、透明感による意匠性の向上を容易に図ることができると共に、薬品類に対する抵抗性や繰り返し応力に対する耐疲労性を容易に発揮することができる。すなわち、本第１実施形態によれば、ハンドル部１２の基台１５には、透明樹脂１７が埋め込まれてハンドル部１２の表面に表出しているので、この透明樹脂１７の透明感によって、優れた意匠性が付与されると共に、植毛部１１、首部１３、及びハンドル部１２の基台１５は、不透明樹脂１６を用いて一体として成形されているので、かかる不透明樹脂１６によって、薬品類に対する十分な抵抗性や、繰り返し応力に対する十分な耐疲労性を備えることが可能になる。   And according to the toothbrush 10 of this 1st Embodiment, while improving the designability by a transparent feeling can be aimed at easily, the resistance with respect to chemicals and the fatigue resistance with respect to a repeated stress can be exhibited easily. . That is, according to the first embodiment, since the transparent resin 17 is embedded in the base 15 of the handle portion 12 and exposed on the surface of the handle portion 12, the transparency of the transparent resin 17 is excellent. In addition, the flocked portion 11, the neck portion 13, and the base 15 of the handle portion 12 are integrally formed using the opaque resin 16, and the opaque resin 16 is sufficient for chemicals. Resistance and sufficient fatigue resistance against repeated stress can be provided.

図２（ａ）及び（ｂ）は、本発明の第２実施形態に係る歯ブラシ２０を示すものである。本第２実施形態によれば、植毛部１１、首部１３、及びハンドル部２２の基台２５は不透明樹脂１６を用いて一体として成形されており、且つハンドル部２２の基台２５には、ハンドル部２２の表裏を貫通して形成された、ハンドル部３２の基台３５を構成する樹脂に周方向を囲まれる周壁を有する開口穴２８ａ，２８ｂが２箇所に設けられており、これらの開口穴２８ａ，２８ｂを各々充填するようにして、異なる色に着色された光透過率が70％以上の透明樹脂２７ａ，２７ｂが基台２５に埋め込まれている。 FIGS. 2A and 2B show a toothbrush 20 according to a second embodiment of the present invention. According to the second embodiment, the flocked portion 11, the neck portion 13, and the base 25 of the handle portion 22 are integrally formed using the opaque resin 16, and the handle 25 has a handle 25 on the base 25. Opening holes 28a and 28b having peripheral walls surrounded by the resin and forming the base 35 of the handle portion 32, which are formed through the front and back of the portion 22, are provided at two locations. Transparent resins 27a and 27b colored in different colors and having a light transmittance of 70% or more are embedded in the base 25 so as to fill each of 28a and 28b.

本発明の第２実施形態の歯ブラシ２０によっても、上記第１実施形態の歯ブラシ１０と同様の作用効果を奏すると共に、透明樹脂２７ａ，２７ｂが異なる色に着色されていることにより、さらに趣に富んだ美観を呈することになる。   Even with the toothbrush 20 of the second embodiment of the present invention, the same effects as those of the toothbrush 10 of the first embodiment are obtained, and the transparent resins 27a and 27b are colored in different colors, so that it is further rich. It will have an aesthetic appearance.

図３（ａ）及び（ｂ）は、本発明の第３実施形態に係る歯ブラシ３０を示すものである。本第３実施形態によれば、植毛部１１、首部１３、及びハンドル部３２の基台３５は不透明樹脂１６を用いて一体として成形されており、且つハンドル部３２の基台３５には、これの長手方向に沿って形成された、ハンドル部３２の基台３５を構成する樹脂に周方向を囲まれる周壁を有する一対の帯状溝３８を充填するようにして、光透過率が70％以上の透明樹脂３７が埋め込まれ、ハンドル部３２の表面にストライプ状に表出している。 3A and 3B show a toothbrush 30 according to a third embodiment of the present invention. According to the third embodiment, the flocked portion 11, the neck portion 13, and the base 35 of the handle portion 32 are integrally formed using the opaque resin 16, and the base 35 of the handle portion 32 has the base 35. A pair of strip-shaped grooves 38 having a peripheral wall surrounded by the circumferential direction are filled in the resin constituting the base 35 of the handle portion 32 formed along the longitudinal direction of A transparent resin 37 is embedded and exposed on the surface of the handle portion 32 in a stripe shape.

図４は、本発明の第４実施形態に係る歯ブラシ４０を示すものである。本第４実施形態によれば、植毛部１１、首部１３、及びハンドル部４２の基台４５は不透明樹脂１６を用いて一体として成形されており、且つハンドル部４２の基台４５には、ハート形の模様に形成された３箇所の穴４８を充填するようにして光透過率が70％以上の透明樹脂４７が埋め込まれ、ハンドル部４２の表面にハート形の模様として表出している。 FIG. 4 shows a toothbrush 40 according to a fourth embodiment of the present invention. According to the fourth embodiment, the flocked portion 11, the neck portion 13, and the base 45 of the handle portion 42 are integrally formed using the opaque resin 16, and the base 45 of the handle portion 42 has a heart shape. A transparent resin 47 having a light transmittance of 70% or more is embedded so as to fill the three holes 48 formed in the shape pattern, and is expressed as a heart-shaped pattern on the surface of the handle portion 42.

図５は、本発明の第５実施形態に係る歯ブラシ５０を示すものである。本第５実施形態によれば、植毛部１１、首部１３、及びハンドル部５２の基台５５は不透明樹脂１６を用いて一体として成形されており、且つハンドル部５２の基台５５には、光透過率が70％以上の透明樹脂５７が埋め込まれてハンドル部５２の表面に表出していると共に、基台５５の一部には、透明樹脂５７と重ならない位置に、光線透過率を問わないエラストマーとして、着色されたエラストマー５９が例えば射出成形や接着剤等を介して取り付けられている。なお、エラストマー５９としては、天然ゴム、ポリイソプレンゴム、シリコンゴム等の他、上述のポリスチレン系又はポリオレフィン系のエラストマーを用いることもできる。   FIG. 5 shows a toothbrush 50 according to a fifth embodiment of the present invention. According to the fifth embodiment, the base portion 55 of the flocked portion 11, the neck portion 13, and the handle portion 52 is integrally molded using the opaque resin 16, and the base 55 of the handle portion 52 has no light. A transparent resin 57 having a transmittance of 70% or more is embedded and exposed on the surface of the handle portion 52, and the light transmittance is not limited to a portion of the base 55 so as not to overlap the transparent resin 57. As an elastomer, a colored elastomer 59 is attached via, for example, injection molding or an adhesive. In addition, as the elastomer 59, the above-mentioned polystyrene-based or polyolefin-based elastomer can be used in addition to natural rubber, polyisoprene rubber, silicon rubber and the like.

そして、第３，第４、第５実施形態の歯ブラシ３０，４０，５０によっても、上記第１実施形態の歯ブラシ１０と同様の作用効果を奏すると共に、特に第５実施形態の歯ブラシ５０によれば、ハンドル部５２の把持性をエラストマー５９によって向上させることができると共に、着色されたエラストマー５９と透明樹脂５７とのハーモニーによって、さらに趣に富んだ美観を呈することになる。   The toothbrushes 30, 40, 50 of the third, fourth, and fifth embodiments have the same operational effects as the toothbrush 10 of the first embodiment, and particularly according to the toothbrush 50 of the fifth embodiment. The grip of the handle portion 52 can be improved by the elastomer 59, and the harmony between the colored elastomer 59 and the transparent resin 57 provides a more pleasing aesthetic appearance.

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、本発明の歯ブラシは、平線植毛によって毛束が植毛台に植毛されるものである必要は必ずしもなく、融着植毛等によって毛束が植毛される歯ブラシであっても良い。また植毛部、首部、及びハンドル部は、段差部を介して連続しているものである必要は必ずしもなく、例えば略同じような断面形状で一体成形されたものであっても良い。さらに、植毛部、首部、及びハンドル部の基台を一体成形する樹脂は、薬品類に対する抵抗性や繰り返し応力に対する耐疲労性を担保できる樹脂であれば、不透明樹脂である必要は必ずしもなく、透明性を帯びた樹脂等であってもよい。   The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the toothbrush of the present invention does not necessarily have to be flocked on the flocking table by flat line flocking, and may be a toothbrush in which the bunch is flocked by fusion flocking or the like. Further, the flocked portion, the neck portion, and the handle portion do not necessarily have to be continuous through the stepped portion, and may be integrally formed with, for example, substantially the same cross-sectional shape. Furthermore, the resin that integrally forms the base of the flocked part, the neck part, and the handle part need not be an opaque resin as long as it is a resin that can ensure resistance to chemicals and fatigue resistance against repeated stress, and is not necessarily transparent. It may be a resin having properties.

本発明の第１実施形態に係る歯ブラシを示す、（ａ）は平面図、（ｂ）は側面図である。The toothbrush which concerns on 1st Embodiment of this invention is shown, (a) is a top view, (b) is a side view. 本発明の第２実施形態に係る歯ブラシを示す、（ａ）は平面図、（ｂ）は側面図である。The toothbrush which concerns on 2nd Embodiment of this invention is shown, (a) is a top view, (b) is a side view. 本発明の第３実施形態に係る歯ブラシを示す、（ａ）は平面図、（ｂ）は側面図である。The toothbrush which concerns on 3rd Embodiment of this invention is shown, (a) is a top view, (b) is a side view. 本発明の第４実施形態に係る歯ブラシを示す平面図である。It is a top view which shows the toothbrush which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係る歯ブラシを示す平面図である。It is a top view which shows the toothbrush which concerns on 5th Embodiment of this invention.

符号の説明Explanation of symbols

１０，２０，３０，４０，５０ 歯ブラシ
１１ 植毛部
１２，２２，３２，４２，５２ ハンドル部
１３ 首部
１４ 毛束
１５，２５，３５，４５，５５ ハンドル部の基台
１６ 不透明樹脂
１７，２７ａ，２７ｂ 透明樹脂（光透過率が７０％以上の樹脂）
１８，２８ａ，２８ｂ 開口穴
１９ 歯と歯茎の境目部分
３７，４７，５７ 透明樹脂（光透過率が７０％以上の樹脂）
３８ 帯状溝
４８ 穴
５９ エラストマー 10, 20, 30, 40, 50 Toothbrush 11 Flocked portion 12, 22, 32, 42, 52 Handle portion 13 Neck portion 14 Hair bundle 15, 25, 35, 45, 55 Base of handle portion 16 Opaque resin 17, 27a, 27b Transparent resin (light transmittance of 70% or more)
18, 28a, 28b Opening hole 19 Boundary portion 37, 47, 57 between teeth and gums Transparent resin (resin having a light transmittance of 70% or more)
38 Belt groove 48 Hole 59 Elastomer

Claims (3)

複数の毛束が植毛される植毛部と、手で把持するハンドル部と、植毛部とハンドル部とを連結する首部とからなる歯ブラシにおいて、
前記植毛部及び前記首部と共に前記ハンドル部の基台はポリオレフィン系樹脂を用いて成形されており、且つ、前記ハンドル部の基台に設けられた開口穴又は溝に光透過率が７０％以上の飽和ポリエステル系樹脂が前記ハンドル部の表面に表出するように埋め込まれて成形されており、前記植毛部及び前記首部と前記ハンドル部の基台をポリオレフィン系樹脂により成形した後、前記基台に設けられた開口穴又は溝に光透過率が７０％以上の飽和ポリエステル系樹脂を埋め込み成形するようになっており、前記開口穴又は溝は、前記光透過率７０％以上の飽和ポリエステル系樹脂が前記ハンドル部の基台を構成するポリオレフィン系樹脂に周方向を環状に囲まれる周壁を有する歯ブラシ。 In a toothbrush consisting of a flocked part in which a plurality of hair bundles are flocked, a handle part gripped by hand, and a neck part connecting the flocked part and the handle part,
The base of the handle part together with the flocked part and the neck part is molded using a polyolefin-based resin, and light transmittance is 70% or more in an opening hole or groove provided in the base of the handle part. Saturated polyester resin is embedded and molded so as to be exposed on the surface of the handle part, and the base of the flocked part and the neck part and the handle part is molded with a polyolefin resin, A saturated polyester resin having a light transmittance of 70% or more is embedded and molded in the provided opening hole or groove, and the saturated polyester resin having a light transmittance of 70% or more is formed in the opening hole or groove. A toothbrush having a peripheral wall that is circumferentially surrounded by a polyolefin-based resin constituting a base of the handle portion. 前記開口穴は、前記ハンドル部の表裏を貫通して形成されている請求項１記載の歯ブラシ。 The toothbrush according to claim 1 , wherein the opening hole is formed through the front and back of the handle portion. 前記ハンドル部の基台には、前記光透過率が７０％以上の飽和ポリエステル系樹脂と重ならない位置に光透過率を問わないエラストマーが取り付けられている請求項１又は２に記載の歯ブラシ。 Wherein the base of the handle portion, toothbrush according light transmission to claim 1 or 2 elastomer is attached agnostic excessive rate to the position where the light transmittance does not overlap with the 70% of the saturated polyester resin.
JP2007118096A 2007-04-27 2007-04-27 toothbrush Expired - Fee Related JP4628394B2 (en)

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US8549691B2 (en) 2009-12-18 2013-10-08 Colgate-Palmolive Company Oral care implement having multi-component handle
JP5879118B2 (en) * 2011-12-19 2016-03-08 ライオン株式会社 toothbrush
JP6905867B2 (en) * 2017-05-26 2021-07-21 花王株式会社 toothbrush
JP7050427B2 (en) * 2017-05-26 2022-04-08 花王株式会社 toothbrush
JP2024005548A (en) * 2022-06-30 2024-01-17 ライオン株式会社 toothbrush

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JPS5952938U (en) * 1982-09-30 1984-04-07 サンスタ−株式会社 toothbrush handle
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JP2001178538A (en) * 1999-12-24 2001-07-03 Lion Corp Toothbrush with pattern
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JPS5952938U (en) * 1982-09-30 1984-04-07 サンスタ−株式会社 toothbrush handle
JPH0266124U (en) * 1988-11-08 1990-05-18
JPH0365585U (en) * 1989-10-25 1991-06-26
JPH06154026A (en) * 1992-07-21 1994-06-03 Johnson & Johnson Consumer Prod Inc Tooth brush with non-slip face
JPH07327737A (en) * 1994-06-10 1995-12-19 Sunstar Inc Toothbrush
JP2000004944A (en) * 1998-06-26 2000-01-11 Lion Corp Tooth brush
JP2000079624A (en) * 1998-09-04 2000-03-21 Shin Etsu Polymer Co Ltd Production of two-color molded article and its molded article
JP2001178538A (en) * 1999-12-24 2001-07-03 Lion Corp Toothbrush with pattern
JP2001186926A (en) * 1999-12-28 2001-07-10 Lion Corp Brush with handle
JP2001275751A (en) * 2000-03-30 2001-10-09 Sunstar Inc Toothbrush and producing process of toothbrush handle

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