JP2018069677A - Brush tip unit and liquid applicator using brush tip unit - Google Patents
Brush tip unit and liquid applicator using brush tip unit Download PDFInfo
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Abstract
Description
本発明は、筆記具や化粧用具等の液体塗布具に用いられる筆先ユニット、及び、該筆先ユニットを用いた液体塗布具に関する。 The present invention relates to a brush tip unit used for a liquid applicator such as a writing tool or a cosmetic tool, and a liquid applicator using the brush tip unit.
毛筆タッチでありながら、液体に筆先を浸漬することなく液体を供給できるタイプの液体塗布具は、上市されてから現在に至るまで筆記具や化粧用具等に欠かせないものとして広く普及している。また、多様化する塗布具の用途や市場のニーズに合わせて、さまざまな筆先の構造や素材、液体供給方法や供給部分の構造、供給される液体の種類等の開発がなされている。 Liquid applicators of the type that can supply a liquid without immersing the brush tip in a liquid while being a brush touch have been widely spread as indispensable for writing instruments, cosmetic tools, and the like since they were put on the market. In addition, various brush tip structures and materials, liquid supply methods and supply part structures, types of liquids to be supplied, and the like have been developed in accordance with the diversifying use of applicators and market needs.
このような液体塗布具はきれいな線を意図したようにしなやかに描けることが重要視されるため、例えばＰＢＴ（ポリブチレンテレフタレート）やナイロン（登録商標）等のモノフィラメント（ブリッスル）を収束したもの等が筆先として用いられる。
液体に筆先を浸漬することなく液体を供給できるタイプの液体塗布具においては、液体は筆先の後端部分から供給されるが、その液体供給方法の一つに、筆先の後端部分を液体に直接接触させ、筆先自身が持つ毛細管力により筆先の先端部分に液体を供給するものがある。しかし、筆先はストレートなモノフィラメントであり、毛細管力は該モノフィラメント間の隙間のサイズにより調整可能ではあるもののその調整範囲は狭く、かつ、毛細管力は小さいため、この方法によって筆先の先端部分に十分に液体を供給することができないという問題がある。そこで、この方法により液体を供給する場合は、モノフィラメントの筆先が有する小さい毛細管力を補うために、液体の種類を限定したり、供給する液体を中綿に担持させずに直液としたりする等の工夫が必要となる。
他の液体供給方法の一つに、筆先の後端部に単なる穴を設け、圧力により該穴から液体又はゲル状の塗布液を筆先の先端部分に供給するものがある。しかし、この方法は圧力を発生させる機構（ノックや回転繰り出し等）が不可欠となり、塗布具として使い勝手に劣るという問題がある。
さらに他の液体供給方法の一つに、筆先の後端部に設けられた穴に中継芯を挿入する等により、中継芯の先端部分を筆先で覆い中継芯の後端部分を液体に浸漬させる構造をとって、該中継芯の毛細管力により液体を筆先の先端部分に供給するものがある。この方法によれば、圧力を発生させる機構は不要である上に、大きな毛細管力を有する中継芯により筆先の先端部分に液体を常時供給できる。このため、この中継芯による液体供給方法は、比較的使い勝手がよい方法の一つとして塗布具に広く応用されている（特許文献１等参照）。
Since it is important that such a liquid applicator can draw a clean line as intended, for example, there is a converged monofilament (bristle) such as PBT (polybutylene terephthalate) or nylon (registered trademark). Used as a brush tip.
In a liquid applicator that can supply liquid without immersing the tip of the brush in the liquid, the liquid is supplied from the rear end portion of the tip of the brush. There is one that directly contacts and supplies liquid to the tip of the brush tip by the capillary force of the brush tip itself. However, the brush tip is a straight monofilament, and the capillary force can be adjusted by the size of the gap between the monofilaments, but the adjustment range is narrow and the capillary force is small. There is a problem that the liquid cannot be supplied. Therefore, when supplying a liquid by this method, in order to compensate for the small capillary force of the monofilament brush tip, the type of the liquid is limited, or the liquid to be supplied is made a direct liquid without being carried on the batting. Ingenuity is required.
As another liquid supply method, there is a method in which a simple hole is provided in the rear end portion of the writing tip and a liquid or gel-like coating liquid is supplied from the hole to the tip portion of the writing tip by pressure. However, this method has a problem that a mechanism for generating pressure (knock, rotation feeding, etc.) is indispensable, and it is inferior in usability as an applicator.
Still another liquid supply method is to insert the relay core into the hole provided at the rear end of the brush tip, so that the tip of the relay core is covered with the brush tip and the rear end of the relay core is immersed in the liquid. Some have a structure and supply liquid to the tip of the brush tip by the capillary force of the relay core. According to this method, a mechanism for generating pressure is unnecessary, and liquid can be constantly supplied to the tip portion of the writing tip by the relay core having a large capillary force. For this reason, this liquid supply method using a relay core is widely applied to applicators as one of relatively easy-to-use methods (see
きれいな線を意図したようにしなやかに描けるような液体塗布具に、前述の中継芯による液体供給方法を用いる場合、できるだけ筆先の先端部に近い位置まで中継芯を挿入し、液体を筆先の先端部分に十分に供給する必要がある。しかしながら、従来の技術で製造した液体塗布具は、中継芯の硬さや剛性により筆先の弾力性を損なうことにより、また、筆記時に筆先の先端部の近くにまで挿入される中継芯が原因で筆先が割れてしまうことにより、意図したような線が描けず筆感が劣るという問題があった。
また、上記の問題の発生を回避し、筆先の先端部分に十分に液体を供給するため、及び筆先の筆感を高めるため、筆先の材料として、異形断面繊維等を数種類ブレンドし、最適な配合を検討する必要があった。
When using the above-mentioned liquid supply method with a relay core in a liquid applicator that can draw a clean line as intended, insert the relay core as close as possible to the tip of the brush tip and place the liquid at the tip of the brush tip. Need to supply enough. However, the liquid applicator manufactured by the conventional technology has a problem that the tip of the brush tip is inserted due to the loss of the elasticity of the writing tip due to the hardness and rigidity of the connecting tip, and because of the connecting lead inserted near the tip of the writing tip when writing. As a result of cracking, there was a problem that the intended line could not be drawn and the writing feeling was inferior.
Also, in order to avoid occurrence of the above problems, supply enough liquid to the tip of the brush tip, and improve the brush feel of the brush tip, blend several types of irregular cross-section fibers etc. It was necessary to consider.
本発明は、上記事情を鑑みたものであり、液体塗布具の筆先ユニットについて、筆先に先端部分を覆われて配置される中継芯の弾性荷重を調整することにより、かつ、該中継芯の筆先への挿入量を調整することにより、液体塗布具の筆感を高めることを課題とする。 The present invention has been made in view of the above circumstances, and by adjusting the elastic load of the relay core arranged with the tip end covered with the tip of the brush tip unit of the liquid applicator, and the brush tip of the relay core It is an object to improve the writing feel of the liquid applicator by adjusting the amount of insertion into the liquid.
上記課題を解決するために、本発明の筆先ユニットは、先端部分がテーパー状に研磨された中継芯と、先端部分がテーパー加工されたモノフィラメントで構成され、前記中継芯の先端部分の外周を覆うように設けられた筆先と、前記筆先の穂先を除く先端部分の外周を覆うように設けられたマウスピースと、を備え、前記筆先の後端部に前記中継芯の先端部分を挿入可能な穴が設けられ、前記中継芯の弾性荷重ｙ（ｇ）が、前記中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であり、前記マウスピースの穂先側先端部から前記筆先の先端部までの長さＡ（ｍｍ）に対する、前記マウスピースの穂先側先端部から前記中継芯の先端部までの長さＢ（ｍｍ）の比率（Ｂ／Ａ）が、０．３以上であることを特徴とする。
さらに、本発明の液体塗布具は、上記筆先ユニットを用いることを特徴とする。
In order to solve the above-mentioned problems, the writing tip unit of the present invention is composed of a relay core whose tip portion is tapered and a monofilament whose tip portion is tapered, and covers the outer periphery of the tip portion of the relay core. And a mouthpiece provided so as to cover the outer periphery of the tip portion excluding the tip of the brush tip, and a hole through which the tip end portion of the relay core can be inserted into the rear end portion of the tip The elastic load y (g) of the relay core is y = 10 × 2 or less with respect to the displacement amount x (mm) from the distal end of the relay core, and from the tip end on the tip side of the mouthpiece The ratio (B / A) of the length B (mm) from the tip side of the mouthpiece to the tip of the relay core to the length A (mm) of the tip of the brush tip is 0.3. It is the above.
Furthermore, the liquid applicator of the present invention uses the above-mentioned brush tip unit.
本発明の筆先ユニットによれば、筆先の先端部分や先端部近傍にまで中継芯を挿入しても、筆先の弾力性を損なうことや、筆記時に中継芯が原因で筆先が割れることを抑えることが可能となる。このため、液体を筆先へ十分に供給することができ、筆感が優れた筆先ユニット及び液体塗布具を得ることができる。
つまり、規定された範囲内の弾性荷重を有する中継芯を選択し、かつ、その中継芯について筆先への挿入量を規定の比率に調整することにより、液体を筆先へ十分に供給でき筆感のコントロールも可能となる。それは、筆先の材料として、異形断面繊維などのブレンド比率を検討することなく十分な液体の供給や筆感のコントロールが可能となることを意味し、液体塗布具用の筆先ユニット（ハイブリッドブラシ）の設計が容易となり、製品や部品のコストを抑えることに繋がる。
According to the writing tip unit of the present invention, even if a relay core is inserted to the tip of the writing tip or near the tip, the elasticity of the writing tip is impaired, and the writing tip is prevented from cracking due to the connecting core at the time of writing. Is possible. For this reason, the liquid can be sufficiently supplied to the brush tip, and a brush tip unit and a liquid applicator excellent in writing feeling can be obtained.
In other words, by selecting a relay core having an elastic load within the specified range and adjusting the insertion amount of the relay core into the writing tip to a specified ratio, the liquid can be sufficiently supplied to the writing tip. Control is also possible. It means that it is possible to supply a sufficient amount of liquid and control the writing feel without considering the blend ratio of irregular cross-section fibers, etc. Design becomes easy and leads to cost reduction of products and parts.
本発明の筆先ユニットは、中継芯と、筆先と、マウスピースを備えるものであり、図１に概略を示す。以下に、本筆先ユニットについて詳細に説明する。
なお、本願明細書において、「先端部」は各部品における液体塗布具の穂先側の最先端部（位置）を指し、「後端部」は各部品における液体塗布具の穂先と反対側の最後端部（位置）を指し、「先端部分」は各部品における先端部の近辺部分を指し、「後端部分」は各部品における後端部の近辺部分を指す。また、「先端側」は穂先側を指し、「後端側」は穂先と反対側を指す。
The brush tip unit of the present invention includes a relay core, a brush tip, and a mouthpiece, and is schematically shown in FIG. Hereinafter, the writing tip unit will be described in detail.
In the specification of the present application, the “front end” refers to the most distal portion (position) of the tip of the liquid applicator in each part, and the “rear end” refers to the end of each part opposite to the tip of the liquid applicator. The end portion (position) is indicated, “tip portion” indicates the vicinity of the tip portion of each component, and “rear end portion” indicates the vicinity of the rear end portion of each component. The “front end side” indicates the tip side, and the “rear end side” indicates the side opposite to the tip.
（中継芯の構成）
本発明の中継芯は、筆先の後端部から液体を供給する、すなわち液体を筆先に「中継」するために設けられる芯であり、先端部分がテーパー状に研磨されている。中継芯の後端部分は液体に浸漬され、中継芯の有する毛細管力によって液体を先端側に吸い上げる。中継芯の先端部分は筆先に覆われ、毛細管力によって吸い上げられた液体を筆先に供給する。
筆先に覆われた中継芯の先端部分の後端側は、さらに後述するマウスピースで覆われる。マウスピースで覆われていない中継芯の先端部分は、筆先とともに穂先として筆記時に使用される。
(Construction of relay core)
The relay core of the present invention is a core provided to supply liquid from the rear end portion of the writing tip, that is, to “relay” the liquid to the writing tip, and the tip portion is polished in a tapered shape. The rear end portion of the relay core is immersed in the liquid, and the liquid is sucked up to the front end side by the capillary force of the relay core. The leading end portion of the relay core is covered with the brush tip, and the liquid sucked up by the capillary force is supplied to the brush tip.
The rear end side of the front end portion of the relay core covered with the brush tip is further covered with a mouthpiece described later. The tip of the relay core that is not covered with the mouthpiece is used as a tip along with the brush tip when writing.
図２Aに、本発明の中継芯の縦断面図の一例を示す。Lｒ1（ｍｍ）は中継芯の先端部から後端部までの長さすなわち中継芯の全長であり、Lｒ2（ｍｍ）は中継芯の先端部から筆先の後端部までの長さであり、B（ｍｍ）は中継芯の芯出長すなわちマウスピースの穂先側先端部から中継芯の先端部までの長さであり、Dｒ（ｍｍ）は中継芯の外径を示す。
図２Bに、本発明の中継芯の縦断面図の別の一例を示す。Lｒ1（ｍｍ）は中継芯の先端部から後端部までの長さすなわち中継芯の全長であり、Lｒ2（ｍｍ）は中継芯の先端部から筆先の後端部までの長さであり、B（ｍｍ）は中継芯の芯出長すなわち中継芯の先端部からマウスピースの穂先側先端部までの長さであり、Dｒ1（ｍｍ）は中継芯の先端側の外径であり、Dｒ2（ｍｍ）は中継芯の後端側の外径を示す。段落とし形状部２ｂを有するため、中継芯の先端側の外径Dｒ1は、後端側の外径Dｒ2より小さい。
FIG. 2A shows an example of a longitudinal sectional view of the relay core of the present invention. Lr 1 (mm) is the length from the leading end of the relay core to the rear end, that is, the total length of the relay core, and Lr 2 (mm) is the length from the leading end of the relay core to the rear end of the writing tip. , B (mm) is the centering length of the relay core, that is, the length from the tip of the mouthpiece to the tip of the relay core, and Dr (mm) indicates the outer diameter of the relay core.
FIG. 2B shows another example of a longitudinal sectional view of the relay core of the present invention. Lr 1 (mm) is the length from the leading end of the relay core to the rear end, that is, the total length of the relay core, and Lr 2 (mm) is the length from the leading end of the relay core to the rear end of the writing tip. , B (mm) is the centering length of the relay core, that is, the length from the tip of the relay core to the tip of the mouthpiece side, Dr 1 (mm) is the outer diameter of the tip of the relay core, Dr 2 (mm) indicates the outer diameter of the rear end side of the relay core. Since the section has the
中継芯の芯出長は、後述する筆先の筆出長に対し０．３以上になるように適宜調整される。たとえば、図２Aのように、中継芯に幅１ｍｍ程度、深さ０．１ｍｍ程度の溝部２ａを設け、筆先の後端部に設けられたツバの内側と嵌め合わせることにより中継芯の芯出長の調整が可能である。
また、図２Bのように、中継芯の中央部に段落とし形状部２ｂを設け筆先の後端部を中継芯の段落とし形状部２ｂに当接させることによっても、中継芯の芯出長の調整が可能である。
なお、中継芯の芯出長と筆先の筆出長との関係は、後述する。
The centering length of the relay core is appropriately adjusted so as to be 0.3 or more with respect to the writing length of the brush tip described later. For example, as shown in FIG. 2A, the relay core is provided with a
Further, as shown in FIG. 2B, the centering length of the relay core can also be increased by making the
The relationship between the centering length of the relay core and the writing length of the writing tip will be described later.
中継芯の先端側の外径Dｒ又はDｒ1は、中継芯の先端部分が筆先に覆われるように、かつ、筆先への液体供給がスムーズに行われるように適宜調整される。
外径Dｒ又はDｒ1が後述する筆先の根本径Ｄｐ1に対して２５％より小さいと、液体供給がスムーズに行われず、筆記時にカスレ等が生じやすくなる。逆に７５％より大きいと、筆先として必要な毛量が不足することから、意図したような線が書きにくく筆感が劣るようになる。このため、中継芯の先端側の外径Dｒ又はDｒ1は、好ましくは筆先の根本径に対して２５〜７５％の比率となるように調整される。
The outer diameter Dr or Dr 1 on the distal end side of the relay core is adjusted as appropriate so that the distal end portion of the relay core is covered with the writing tip and the liquid is smoothly supplied to the writing tip.
When the outer diameter Dr or Dr 1 is smaller than 25% with respect to the root diameter Dp 1 of the brush tip, which will be described later, liquid supply is not performed smoothly, and blurring or the like tends to occur during writing. On the other hand, if it is larger than 75%, the amount of hair necessary for the brush tip is insufficient, so that it is difficult to write the intended line and the writing feeling becomes inferior. For this reason, the outer diameter Dr or Dr 1 on the leading end side of the relay core is preferably adjusted to be a ratio of 25 to 75% with respect to the root diameter of the writing tip.
中継芯の素材には、筆先の有する弾力性が損なわれることを防ぐために、所定の範囲内の弾性荷重ｙ（ｇ）を有するものが使用される。
具体的には、弾性荷重ｙ（ｇ）が、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下である中継芯が用いられる。弾性荷重がｙ＝１０ｘ2より大きいと、液体供給をスムーズにするために筆先の先端部の極近くまで挿入された中継芯が筆先の弾力性を損ない、意図したような線が描けなくなるためである。
A material having an elastic load y (g) within a predetermined range is used for the material of the relay core in order to prevent the elasticity of the brush tip from being impaired.
Specifically, a relay core whose elastic load y (g) is y = 10 × 2 or less with respect to the displacement amount x (mm) from the tip of the relay core is used. In since the elastic force greater than y = 10x 2, the relay core is inserted to close proximity to the tip of the brush tip in order to smooth the liquid supply impair the elasticity of the brush tip, not draw a line as intended is there.
中継芯の素材は、前述した弾性荷重を有するものであれば特に制限はなく、任意に選択される。中継芯の素材の一例としては、ナイロン繊維、ポリエステル繊維、アクリル繊維、又は、これらの混合繊維が挙げられる。ポリマーの重合度や各ポリマー繊維の混合割合については、該弾性荷重を有するものであれば特に制限はない。また、中継芯の気孔率も、該弾性荷重を有するものであれば特に制限はなく、たとえば３０〜９０％程度のものが適宜選択される。 The material of the relay core is not particularly limited as long as it has the elastic load described above, and is arbitrarily selected. Examples of the material of the relay core include nylon fiber, polyester fiber, acrylic fiber, or a mixed fiber thereof. The degree of polymerization of the polymer and the mixing ratio of each polymer fiber are not particularly limited as long as it has the elastic load. Further, the porosity of the relay core is not particularly limited as long as it has the elastic load. For example, a porosity of about 30 to 90% is appropriately selected.
（筆先の構成）
本発明の筆先は、筆先の後端部から中継芯によって供給される液体を用い、筆先の先端部分の穂先で筆記するために設けられる。穂先の後端部は、筆先の穂先を除く部分の外周を覆うマウスピースの先端部の位置により画定される。筆先の先端部分は、テーパー加工されたモノフィラメントで構成される。
筆先が中継芯の先端部分の外周を覆う構造にするため、たとえば中継芯を筆先に挿入する方法が取られる。中継芯を筆先に挿入しやすくするために、好ましくは筆先の後端部に穴が設けられる。該穴の径は、中継芯の先端側の外径と同じか、やや小さい。中継芯の弾力により挿入可能であれば、筆先の穴の径が中継芯の先端側の外径よりもやや小さくてもよい。
また、筆先の穂先を除く部分の外周を覆うマウスピースを筆先の後端部分に位置ずれしないように配置するために、好ましくは筆先の後端部にツバ部が設けられる。該ツバ部はマウスピースの筆先後端固定部に当接し、ツバ部の外径は筆先の根本径より大きい。
該穴と該ツバ部は、たとえば、先端部分がテーパー加工されたモノフィラメントについて、根本径と同じ外径を有するモノフィラメントの束を所定の長さ（筆先の全長よりやや長め）に後端部で切断し、切断面を加熱により溶着し、溶着時にツバ部を形成し、溶着された切断面の中央部を筆先の該穴の径と同じ径を有する円形状にくり抜き、くり抜いた切断面の中央部に溶着しているモノフィラメントごと取り出して除去することにより、設けることができる。
(Composition of the brush tip)
The writing tip of the present invention is provided for writing at the tip of the tip of the writing tip using the liquid supplied from the trailing end of the writing tip by the relay core. The rear end of the tip is defined by the position of the tip of the mouthpiece that covers the outer periphery of the portion excluding the tip of the brush tip. The tip of the brush tip is formed of a monofilament that is tapered.
In order to make the brush tip cover the outer periphery of the leading end portion of the relay core, for example, a method of inserting the relay core into the brush tip is taken. In order to facilitate the insertion of the relay core into the writing tip, a hole is preferably provided in the rear end portion of the writing tip. The diameter of the hole is the same as or slightly smaller than the outer diameter of the leading end side of the relay core. As long as insertion is possible by the elasticity of the relay core, the diameter of the hole at the tip of the brush may be slightly smaller than the outer diameter on the tip side of the relay core.
Moreover, in order to arrange the mouthpiece covering the outer periphery of the portion excluding the tip of the brush tip so as not to be displaced in the rear end portion of the brush tip, a brim portion is preferably provided at the rear end portion of the brush tip. The brim portion is in contact with the tip rear end fixing portion of the mouthpiece, and the outer diameter of the brim portion is larger than the root diameter of the nib.
For the monofilament with the tip portion tapered, for example, the hole and the flange portion cut a bundle of monofilaments having the same outer diameter as the root diameter to a predetermined length (slightly longer than the full length of the brush tip) at the rear end. Then, the cut surface is welded by heating, a flange is formed at the time of welding, and the central portion of the welded cut surface is cut into a circular shape having the same diameter as the diameter of the hole of the brush tip, and the central portion of the cut cut surface It can be provided by taking out and removing the monofilaments welded to each other.
図３に、本発明の筆先の縦断面図の一例を示す。
Ｌｐ1（ｍｍ）は筆先の先端部から後端部までの長さすなわち筆先の全長であり、Ａ（ｍｍ）は筆先の筆出長すなわち穂先の長さすなわちマウスピースの穂先側先端部から筆先の先端部までの長さであり、Dｐ1（ｍｍ）は筆先の後端部分（ただし後端部を除く）の外径すなわち筆先の根本径であり、Dｐ2（ｍｍ）は筆先の後端部に設けられたツバ部３ａの外径であり、Dｐ3（ｍｍ）は筆先の後端部に設けられた穴の径を示す。
In FIG. 3, an example of the longitudinal cross-sectional view of the brush tip of this invention is shown.
Lp 1 (mm) is the length from the tip of the brush tip to the rear edge, that is, the total length of the brush tip, and A (mm) is the writing length of the brush tip, ie, the tip length, ie, the tip of the mouthpiece from the tip of the tip. Dp 1 (mm) is the outer diameter of the trailing edge of the brush tip (excluding the trailing edge), that is, the root diameter of the brush tip, and Dp 2 (mm) is the trailing edge of the brush tip. Dp 3 (mm) indicates the diameter of the hole provided in the rear end portion of the writing tip.
筆先の筆出長Ａは、筆記可能な範囲であれば特に制限はないが、筆出長が４ｍｍ未満であると筆記時にマウスピースの穂先側先端部が被筆記物の紙や肌等と接触しやすくなり筆感が劣り、一方、筆出長が２０ｍｍを超えると筆先としてのバランスが悪くなり使用感が劣るため、４〜２０ｍｍに調整されることが好ましい。
なお、中継芯の芯出長と筆先の筆出長との関係は、後述する。
The writing length A of the writing tip is not particularly limited as long as it can be written, but if the writing length is less than 4 mm, the tip of the tip of the mouthpiece contacts the paper or skin of the writing object when writing. However, when the writing length exceeds 20 mm, the balance as the brush tip is deteriorated and the feeling of use is inferior, so that it is preferably adjusted to 4 to 20 mm.
The relationship between the centering length of the relay core and the writing length of the writing tip will be described later.
筆先の根本径Dｐ1は、本筆先ユニットが用いられる液体塗布具の用途や目的により、適宜設定される。筆先の根本径が１．５ｍｍより小さいと、中継芯を覆うことが難しくなり、根本径が６．０ｍｍより大きいと、筆先としてのバランスが悪くなり使用感が劣る筆先ユニットとなる。このため、筆先の根本径Dｐ1は、１．５〜６．０ｍｍの範囲に設定される。 The root diameter Dp 1 of the brush tip is appropriately set depending on the use and purpose of the liquid applicator in which the brush tip unit is used. When the root diameter of the brush tip is smaller than 1.5 mm, it becomes difficult to cover the relay core. When the root diameter is larger than 6.0 mm, the brush tip becomes unbalanced and the brush tip unit is inferior in usability. For this reason, the root diameter Dp 1 of the brush tip is set in a range of 1.5 to 6.0 mm.
筆先の穴の径Dｐ3は、上述のとおり、中継芯の先端側の外径Ｄｒ又はＤｒ1と同じか、やや小さい。中継芯の弾力により挿入可能であれば、筆先の穴の径が中継芯の先端側の外径よりもやや小さくてもよい。 Diameter Dp 3 holes in the brush tip, as described above, the same as the outer diameter Dr and Dr 1 of the distal end side of the relay core, slightly smaller. As long as insertion is possible by the elasticity of the relay core, the diameter of the hole at the tip of the brush may be slightly smaller than the outer diameter on the tip side of the relay core.
筆先のツバ部の外径Dｐ2は、後述するマウスピースの筆先後端固定部４ａを当接可能な大きさとなるように、かつ、本筆先ユニットを用いる液体塗布具の太さを考慮し塗布具の内部に収まるように、設定される。
Outer diameter Dp 2 of the flange portion of the brush tip is such that the brush tip
筆先の素材は、テーパー加工されたモノフィラメントであれば特に制限はなく、任意に選択される。筆先の素材の一例としては、ＰＢＴ（ポリブチレンテレフタレート）製テーパーフィラメント、ナイロン製テーパーフィラメント、ＰＰＳ（ポリフェニレンサルファイド）製テーパーフィラメント、フッ素樹脂製テーパーフィラメント等が挙げられる。中でも汎用性の面から、ＰＢＴ（ポリブチレンテレフタレート）製テーパーフィラメント、ナイロン製テーパーフィラメントが好ましい。 The material of the brush tip is not particularly limited as long as it is a monofilament that is tapered, and is arbitrarily selected. Examples of the material of the brush tip include a PBT (polybutylene terephthalate) taper filament, a nylon taper filament, a PPS (polyphenylene sulfide) taper filament, and a fluororesin taper filament. Among these, from the viewpoint of versatility, a tapered filament made of PBT (polybutylene terephthalate) and a tapered filament made of nylon are preferable.
筆先のモノフィラメントの径は、本筆先ユニットが用いられる液体塗布具の用途や目的により、適宜設定される。筆感や肌触りの面から０．０５〜０．３０ｍｍの範囲が好ましく、０．１０〜０．２０ｍｍの範囲がより好ましい。 The diameter of the monofilament at the writing tip is appropriately set depending on the application and purpose of the liquid applicator used with the writing tip unit. The range of 0.05-0.30 mm is preferable from the surface of writing feeling and touch, and the range of 0.10-0.20 mm is more preferable.
（マウスピースの構成）
本発明のマウスピースは、筆先の穂先を除く部分の外周を覆うように設けられる。すなわち、マウスピースは、筆先の穂先を除く部分と中継芯の穂先を除く部分を固定するように覆い、先端部分がテーパー加工されたモノフィラメントで構成されることにより穂先に向かって縮径する筆先の先端部分のうち穂先を除く部分を束ね、筆先の後端部分に固定されるように設けられる。マウスピースの内周形状は、筆先の先端部分のうちの穂先を除く部分を束ねることが可能であれば特に制限はなく、たとえば後端部分から先端部分まで略テーパー状で縮径しているものや、後端部分から所定の位置まで同一の内径を有し該所定の位置から先端部分まで略テーパー状で縮径しているもの、また、所定の位置に段落とし形状部を有するものなどが挙げられる。筆先の後端部にツバ部がある場合は、マウスピースの筆先後端固定部が筆先のツバ部に当接するように設けられる。
(Mouthpiece configuration)
The mouthpiece of the present invention is provided so as to cover the outer periphery of the portion excluding the tip of the brush tip. That is, the mouthpiece covers the tip of the tip excluding the tip of the brush tip and the portion excluding the tip of the relay core, and the tip of the tip is made of a monofilament that is tapered to reduce the diameter of the tip of the tip. A part excluding the tip of the tip part is bundled and provided so as to be fixed to the rear end part of the brush tip. The inner peripheral shape of the mouthpiece is not particularly limited as long as it is possible to bundle the tip part of the tip of the brush tip except the tip, for example, the diameter of the mouthpiece is substantially tapered from the rear end part to the tip part. And those having the same inner diameter from the rear end portion to a predetermined position and having a tapered shape from the predetermined position to the tip portion, and having a shape portion as a paragraph at the predetermined position, etc. Can be mentioned. When there is a brim portion at the rear end portion of the brush tip, the tip rear end fixing portion of the mouthpiece is provided so as to abut on the brim portion of the brush tip.
図４Ａに、本発明のマウスピースの縦断面図の一例を示す。Ｌｍ1（ｍｍ）はマウスピースの先端部から筆先後端固定部４ａまでの長さであり、Dｍ1（ｍｍ）はマウスピースの先端部の内径であり、Dｍ2（ｍｍ）はマウスピースの筆先後端固定部４ａの先端側内径を示す。図４Ａに示した例のようにマウスピースの先端部から筆先後端固定部４ａまでの長さＬｍ1がマウスピースの全長と等しい場合は、マウスピースの筆先後端固定部４ａの先端側内径Dｍ2はマウスピースの後端部の内径となる。マウスピースの先端部分は、穂先に向かって縮径する筆先の先端部分を覆うため、先端部の内径Dｍ1（ｍｍ）は後端部の内径Dｍ2より小さい。
図４Ｂに、本発明のマウスピースの縦断面図の他の一例を示す。Ｌｍ1（ｍｍ）はマウスピースの先端部から筆先後端固定部４ａまでの長さであり、Dｍ1（ｍｍ）はマウスピースの先端部の内径であり、Dｍ2（ｍｍ）はマウスピースの筆先後端固定部４ａの先端側内径、Dｍ3（ｍｍ）はマウスピースの筆先後端固定部４ａの後端側内径を示す。マウスピースの先端部分は、穂先に向かって縮径する筆先の先端部分を覆うため、先端部の内径Dｍ1（ｍｍ）は筆先後端固定部４ａの先端側内径Dｍ2より小さい。また、マウスピースの筆先後端固定部４ａと筆先のツバ部３ａを当接して筆先を固定するため、筆先後端固定部４ａの先端側内径Dｍ2（ｍｍ）は筆先後端固定部４ａの後端側内径Dｍ3（ｍｍ）より小さく、段落とし形状となっている。
FIG. 4A shows an example of a longitudinal sectional view of the mouthpiece of the present invention. Lm 1 (mm) is the length from the tip of the mouthpiece to the writing tip rear
FIG. 4B shows another example of a longitudinal sectional view of the mouthpiece of the present invention. Lm 1 (mm) is the length from the tip of the mouthpiece to the writing tip rear
マウスピースの素材は、筆先を固定できるものであれば特に制限はなく、ＡＢＳ樹脂、ＰＰ樹脂等が用いられる。
また、マウスピースの外側の形状は、本筆先ユニットを収納する液体塗布具の形状を考慮して設計される。
The mouthpiece material is not particularly limited as long as the tip of the mouthpiece can be fixed, and ABS resin, PP resin, or the like is used.
In addition, the shape of the outside of the mouthpiece is designed in consideration of the shape of the liquid applicator that houses the brush tip unit.
（筆先ユニットの構成）
本発明の筆先ユニットは、上述した中継芯と、中継芯の先端部分の外周を覆うように設けられた筆先と、筆先の穂先を除く先端部分の外周を覆うように設けられたマウスピースと、を備え、マウスピースの穂先側先端部から筆先の先端部までの長さすなわち筆出長Ａに対する、マウスピースの穂先側先端部から中継芯の先端部までの長さすなわち芯出長Ｂの比率（Ｂ／Ａ）が０．３以上となるように組み付けられる。
筆先ユニットの組み付け方法の一例として、まず、マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させ、次に、筆先の穴に中継芯を挿入し、中継芯の溝部と筆先の穴を嵌合させる方法が挙げられる（図１及び図５参照）。この場合、筆出長Ａに対する芯出長Ｂの比率（Ｂ／Ａ）は、中継芯の溝部の位置によって調整される。
筆先ユニットの組み付け方法の他の一例として、まず、マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させ、次に、筆先の穴に中継芯を挿入し、中継芯の段落とし形状部に筆先の穴を当接させる方法が挙げられる。この場合、筆出長Ａに対する芯出長Ｂの比率（Ｂ／Ａ）は、中継芯の段落とし形状部の位置によって調整される。
(Configuration of the brush unit)
The brush tip unit of the present invention includes the above-described relay core, a brush tip provided to cover the outer periphery of the tip portion of the relay core, a mouthpiece provided to cover the outer periphery of the tip portion excluding the tip of the brush tip, The ratio of the length from the tip side of the mouthpiece to the tip of the relay core, that is, the centering length B to the length from the tip side of the tip of the mouthpiece to the tip of the tip, that is, the writing length A It is assembled so that (B / A) is 0.3 or more.
As an example of how to assemble the brush tip unit, first insert the brush tip from the rear end of the mouthpiece, bring the tip of the brush tip into contact with the tip rear end fixing portion of the mouthpiece, and then connect the relay core to the hole of the tip. Is inserted, and the groove portion of the relay core and the hole of the brush tip are fitted (see FIGS. 1 and 5). In this case, the ratio of the centering length B to the writing length A (B / A) is adjusted by the position of the groove portion of the relay core.
As another example of the method of assembling the brush tip unit, first, the brush tip is inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece are brought into contact with each other. There is a method in which a relay core is inserted to make a paragraph of the relay core and a hole of a brush tip is brought into contact with the shape portion. In this case, the ratio (B / A) of the centering length B to the writing length A is adjusted according to the position of the shape portion as the paragraph of the relay core.
（筆出長Ａに対する芯出長Ｂの比率）
本発明の筆先の筆出長と中継芯の芯出長は、上述のとおり、マウスピースの穂先側先端部から筆先の先端部までの長さすなわち筆出長Ａに対する、マウスピースの穂先側先端部から中継芯の先端部までの長さすなわち芯出長Ｂの比率（Ｂ／Ａ）が０．３以上となるように調整され、好ましくは０．３以上２．０以下、より好ましくは０．３以上１．２以下に調整される。
筆出長Ａに対する芯出長Ｂの比率が０．３未満であると、中継芯から筆先への液体の供給が十分でなくなり、また、中継芯の弾力性を筆感に寄与させることが難しくなる。一方で、本発明の中継芯を使用すれば、筆先長Ａに対して芯出長Ｂのほうが長い場合であっても、筆先の弾力性を損なわずに液体を筆先へ十分に供給することができ、筆感が優れた筆先ユニット及び液体塗布具を得ることができる。
(Ratio of centering length B to writing length A)
The writing length of the writing tip of the present invention and the centering length of the relay core are, as described above, the length from the tip of the mouthpiece to the tip of the writing tip, that is, the tip of the tip of the mouthpiece with respect to the writing length A. Is adjusted so that the length (B / A) of the length from the center to the leading end of the relay core, that is, the centering length B, is 0.3 or more, preferably 0.3 or more and 2.0 or less, more preferably 0. .3 or more and 1.2 or less.
When the ratio of the centering length B to the writing length A is less than 0.3, the supply of liquid from the relay core to the writing tip becomes insufficient, and it is difficult to contribute to the writing feeling by the elasticity of the relay core. Become. On the other hand, if the relay core of the present invention is used, even if the centering length B is longer than the writing tip length A, the liquid can be sufficiently supplied to the writing tip without impairing the elasticity of the writing tip. And a brush tip unit and a liquid applicator excellent in writing feeling can be obtained.
図５Ａに、中継芯２に溝部２ａがあり、マウスピース４の先端部から筆先後端固定部４ａまでの長さ（Ｌｍ１）はマウスピース４の全長と等しく、筆出長Ａが芯出長Ｂより大きい筆先ユニットの一例を示す。
図５Ｂに、中継芯２に溝部２ａがあり、マウスピース４の先端部から筆先後端固定部４ａまでの長さ（Ｌｍ１）はマウスピース４の全長と等しく、筆出長Ａが芯出長Ｂより小さい筆先ユニットの他の一例を示す。
図５Ｃに、中継芯２に溝部２ａがあり、マウスピース４の先端部から筆先後端固定部４ａまでの長さ（Ｌｍ１）はマウスピース４の全長より小さく、マウスピースの内部に段落とし形状部があり、筆出長Ａが芯出長Ｂより大きい筆先ユニットの他の一例を示す。
In FIG. 5A, the
In FIG. 5B, the
In FIG. 5C, the
（液体塗布具）
本発明の筆先ユニットは、筆記具や化粧用具等の液体塗布具に適用可能である。
(Liquid applicator)
The writing tip unit of the present invention is applicable to liquid applicators such as writing instruments and cosmetic tools.
以下に本発明の実施例を具体的に説明するが、本発明はこれらの実施例に何ら限定されるものではない。 Examples of the present invention are specifically described below, but the present invention is not limited to these Examples.
（実施例１）
―中継芯―
単糸径が３ｄ（デニール）であるナイロン繊維とウレタン樹脂から成る気孔率７４％の成形体について、外径Dｒを１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部をテーパー状に研磨し、中継芯の先端部から１９〜２０ｍｍの位置に幅１ｍｍ、深さ０．１ｍｍの溝部を有する中継芯を得た。この溝部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は２０ｍｍとなった。
Example 1
-Relay core-
For a 74% porosity molded body made of nylon fiber and urethane resin with a single yarn diameter of 3d (denier), the outer diameter Dr is 1.5 mm, the total length Lr 1 is 31 mm, and the tip is polished in a taper shape. A relay core having a groove portion having a width of 1 mm and a depth of 0.1 mm at a position of 19 to 20 mm from the distal end portion of the relay core was obtained. With this groove, the length of the relay core covered with the brush tip, that is, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the brush tip is 20 mm.
―中継芯の弾性試験―
得られた中継芯について、縦型電動計測スタンドＭＸ２−５００Ｎ−３（株式会社イマダ製）に、デジタルフォースゲージＤＳ２−５０Ｎ（株式会社イマダ製）を取り付けた装置を用い、弾性試験を行い、弾性荷重を求めた。
より具体的には、中継芯を押しつけ治具に対して６０°の角度でセットし、押しつけ速度２０ｍｍ／ｍｉｎで押しつけ治具を中継芯の先端部に向かって押しつけた。このとき、中継芯の先端部からの変位量ｘ（ｍｍ）に対して、デジタルフォースゲージが示す弾性荷重ｙ（ｇ）を測定した。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜６ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であった。
-Elasticity test of relay core-
The obtained relay core is subjected to an elasticity test using a device in which a digital force gauge DS2-50N (manufactured by Imada Co., Ltd.) is attached to a vertical electric measurement stand MX2-500N-3 (manufactured by Imada Co., Ltd.). The load was determined.
More specifically, the relay core was set at an angle of 60 ° with respect to the pressing jig, and the pressing jig was pressed toward the tip of the relay core at a pressing speed of 20 mm / min. At this time, the elastic load y (g) indicated by the digital force gauge was measured with respect to the displacement amount x (mm) from the tip of the relay core.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 6 g with respect to the displacement amount 0 to 2.4 mm from the leading end portion of the relay core, and the elastic load y (g) of the relay core is the displacement amount x from the leading end portion of the relay core. (Mm), y = 10 × 2 or less.
―筆先―
先端部分がテーパー加工された直径０．１５ｍｍのＰＢＴ製モノフィラメントを束ね、根本径Dｐ1が２．９ｍｍに、全長Ｌｐ1が２３．０ｍｍに、ツバ部の外径Dｐ2が４．０ｍｍに、ツバ部の厚みが１ｍｍなるように、後端部で切断し、切断面を加熱により溶着し、溶着時にツバ部を形成した。次に、後端部の穴の径Dｐ3が１．４ｍｍになるように溶着された切断面の中央部を円形状にくり抜き、くり抜いた切断面の中央部に溶着しているモノフィラメントごと取り出して除去することにより、筆先を得た。
-Brush tip-
Bundled with a 0.15 mm diameter PBT monofilament with a tapered tip, the root diameter Dp 1 is 2.9 mm, the total length Lp 1 is 23.0 mm, and the outer diameter Dp 2 of the collar is 4.0 mm. Cut at the rear end so that the thickness of the brim portion was 1 mm, the cut surfaces were welded by heating, and the brim portion was formed at the time of welding. Next, hollowed central portion of the cut surface is the diameter Dp 3 holes in the rear end portion is welded so as to be 1.4mm circular, removed each monofilament is welded to the central portion of the cut surface hollowed The brush tip was obtained by removing.
―マウスピース―
全長Ｌｍ1が１５ｍｍ、先端部の内径Dｍ1が２．０ｍｍ、筆先後端固定部の先端側内径Dｍ2が３．０ｍｍのマウスピースを用意した。
―Mouthpiece―
A mouthpiece having a total length Lm 1 of 15 mm, an inner diameter Dm 1 of the tip part of 2.0 mm, and an inner diameter Dm 2 of the tip side of the writing tip rear end fixing part of 3.0 mm was prepared.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の溝部と筆先の穴を嵌合させた。中継芯の外径Dｒは１．５ｍｍであり、筆先の後端部の穴の径Dｐ3（１．４ｍｍ）より大きいが、中継芯の有する弾力により、挿入可能である。
中継芯の溝部と筆先の後端部の穴が嵌合することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が２０ｍｍとなる。また、マウスピースの筆先後端固定部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは４ｍｍ（＝２０−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．５７となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the groove portion of the relay core and the hole of the brush tip were fitted. The outer diameter Dr of the relay core is 1.5 mm, which is larger than the diameter Dp 3 (1.4 mm) of the hole at the rear end of the writing tip, but can be inserted by the elasticity of the relay core.
When the groove of the relay core and the hole at the rear end portion of the writing tip are fitted, the length Lr 2 from the front end portion of the relay core to the rear end portion of the writing tip becomes 20 mm. In addition, the writing tip A is 7 mm (= 23.0-15-1) and the centering length B is 4 mm (= 20-15-15) when the writing tip rear end fixing portion of the mouthpiece comes into contact with the brim portion of the writing tip. 1), and the ratio of the centering length to the writing length (B / A) is 0.57.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
インク容器に組み込んだ筆先ユニットにおける中継芯から筆先への液体供給状態は、１ｍ筆記時のインクの流出量を測定することにより評価した。
インクの流出量が十分な場合（流出量が８．５ｍｇより多い場合）を◎、ふつうの場合（流出量が６．０〜８．５ｍｇの場合）を○、不十分な場合（流出量が６．０ｍｇより少ない場合）を△とした。
さらに、筆感と筆割れの有無も評価した。筆感は、特に、筆先の弾力性を中継芯が阻害するか否かの観点から、良好な場合を○、不良の場合を×とした。筆割れの有無は筆記時に筆先が2方向に割れるなどの状態を観察して行った。
筆記試験の結果を、表２に示した。
実施例１のインクの流出量はふつう程度であり、筆感は良好であり、筆割れは見られなかった。
-written examination-
The liquid supply state from the relay core to the writing tip in the writing tip unit incorporated in the ink container was evaluated by measuring the amount of ink flowing out during 1 m writing.
◎ when the outflow amount of ink is sufficient (when the outflow amount is more than 8.5 mg), ○ when normal (when the outflow amount is 6.0 to 8.5 mg), and insufficient (outflow amount is Δ (when less than 6.0 mg).
Furthermore, the writing feeling and the presence or absence of brush cracks were also evaluated. In terms of writing feeling, in particular, from the viewpoint of whether or not the relay core hinders the elasticity of the writing tip, the good case was evaluated as ○ and the poor case as x. The presence or absence of cracks was observed by observing the state that the tip of the brush broke in two directions at the time of writing.
The results of the written test are shown in Table 2.
The amount of outflow of the ink of Example 1 was normal, the writing feeling was good, and no cracking was observed.
（実施例２）
―中継芯―
単糸径が３ｄ（デニール）であるナイロン繊維とウレタン樹脂から成る気孔率７４％の成形体について、外径Dｒを１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部をテーパー状に研磨し、中継芯の先端部から２１〜２２ｍｍの位置に幅１ｍｍ、深さ０．１ｍｍの溝部を有する中継芯を得た。この溝部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は２２ｍｍとなった。
(Example 2)
-Relay core-
For a 74% porosity molded body made of nylon fiber and urethane resin with a single yarn diameter of 3d (denier), the outer diameter Dr is 1.5 mm, the total length Lr 1 is 31 mm, and the tip is polished in a taper shape. Then, a relay core having a groove portion having a width of 1 mm and a depth of 0.1 mm at a position of 21 to 22 mm from the distal end portion of the relay core was obtained. Due to this groove, the length of the relay core covered by the brush tip, that is, the length Lr 2 from the leading end of the relay core to the rear end of the brush tip was 22 mm.
―中継芯の弾性試験―
得られた中継芯の弾性荷重は実施例１と同じである。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜６ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であった。
-Elasticity test of relay core-
The elastic load of the obtained relay core is the same as in Example 1.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 6 g with respect to the displacement amount 0 to 2.4 mm from the leading end portion of the relay core, and the elastic load y (g) of the relay core is the displacement amount x from the leading end portion of the relay core. (Mm), y = 10 × 2 or less.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の溝部と筆先の穴を嵌合させた。中継芯の外径Dｒは１．５ｍｍであり、筆先の後端部の穴の径Dｐ3（１．４ｍｍ）より大きいが、中継芯の有する弾力により、挿入可能である。
中継芯の溝部と筆先の後端部の穴が嵌合することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が２２ｍｍとなる。また、マウスピースの筆先後端固定部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは６ｍｍ（＝２２−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．８６となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the groove portion of the relay core and the hole of the brush tip were fitted. The outer diameter Dr of the relay core is 1.5 mm, which is larger than the diameter Dp 3 (1.4 mm) of the hole at the rear end of the writing tip, but can be inserted by the elasticity of the relay core.
By fitting the groove of the relay core and the hole at the rear end of the writing tip, the length Lr 2 from the leading end of the relay core to the rear end of the writing tip becomes 22 mm. In addition, the writing tip A is 7 mm (= 23.0-15-1) and the centering length B is 6 mm (= 22-15-15) by contacting the tip end fixing portion of the mouthpiece with the brim portion of the writing tip. 1), and the ratio of the centering length to the writing length (B / A) is 0.86.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を表２に示した。
実施例２のインクの流出量は十分であり、筆感は良好であり、筆割れは見られなかった。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The outflow amount of the ink of Example 2 was sufficient, the writing feeling was good, and no brush cracks were seen.
（実施例３）
―中継芯―
単糸径が３ｄ（デニール）であるナイロン繊維とウレタン樹脂から成る気孔率７４％の成形体について、外径Dｒを１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部をテーパー状に研磨し、中継芯の先端部から２３〜２４ｍｍの位置に幅１ｍｍ、深さ０．１ｍｍの溝部を有する中継芯を得た。この溝部により、中継芯の先端部から筆先の後端部までの長さLｒ2は２４ｍｍとなった。
(Example 3)
-Relay core-
For a 74% porosity molded body made of nylon fiber and urethane resin with a single yarn diameter of 3d (denier), the outer diameter Dr is 1.5 mm, the total length Lr 1 is 31 mm, and the tip is polished in a taper shape. Then, a relay core having a groove portion having a width of 1 mm and a depth of 0.1 mm at a position 23 to 24 mm from the distal end portion of the relay core was obtained. With this groove, the length Lr 2 from the leading end of the relay core to the trailing end of the writing tip was 24 mm.
―中継芯の弾性試験―
得られた中継芯の弾性荷重は実施例１と同じである。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜６ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であった。
-Elasticity test of relay core-
The elastic load of the obtained relay core is the same as in Example 1.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 6 g with respect to the displacement amount 0 to 2.4 mm from the leading end portion of the relay core, and the elastic load y (g) of the relay core is the displacement amount x from the leading end portion of the relay core. (Mm), y = 10 × 2 or less.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の溝部と筆先の穴を嵌合させた。中継芯の外径Dｒは１．５ｍｍであり、筆先の後端部の穴の径Dｐ3（１．４ｍｍ）より大きいが、中継芯の有する弾力により、挿入可能である。
中継芯の溝部と筆先の後端部の穴が嵌合することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が２４ｍｍとなる。また、マウスピースの筆先後端固定部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは８ｍｍ（＝２４−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は１．１４となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the groove portion of the relay core and the hole of the brush tip were fitted. The outer diameter Dr of the relay core is 1.5 mm, which is larger than the diameter Dp 3 (1.4 mm) of the hole at the rear end of the writing tip, but can be inserted by the elasticity of the relay core.
When the groove of the relay core and the hole at the rear end portion of the writing tip are fitted, the length Lr 2 from the front end portion of the relay core to the rear end portion of the writing tip becomes 24 mm. In addition, the writing tip A is 7 mm (= 23.0-15-1) and the centering length B is 8 mm (= 24-15-15) when the writing tip rear end fixing portion of the mouthpiece comes into contact with the brim portion of the writing tip. 1), and the ratio of the centering length to the writing length (B / A) is 1.14.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を表２に示した。
実施例３のインクの流出量は十分であり、筆感は良好であり、筆割れは見られなかった。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The ink outflow amount of Example 3 was sufficient, the writing feeling was good, and no brush cracks were observed.
（実施例４）
―中継芯―
単糸径が３ｄ（デニール）であるナイロン繊維とウレタン樹脂から成る気孔率６６％の成形体について、外径Dｒを１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部をテーパー状に研磨し、中継芯の先端部から１９〜２０ｍｍの位置に幅１ｍｍ、深さ０．１ｍｍの溝部を有する中継芯を得た。この溝部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は２０ｍｍとなった。
Example 4
-Relay core-
For a 66% porosity molded body made of nylon fiber and urethane resin with a single yarn diameter of 3d (denier), the outer diameter Dr is 1.5 mm, the total length Lr 1 is 31 mm, and the tip is polished in a taper shape. A relay core having a groove portion having a width of 1 mm and a depth of 0.1 mm at a position of 19 to 20 mm from the distal end portion of the relay core was obtained. With this groove, the length of the relay core covered with the brush tip, that is, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the brush tip is 20 mm.
―中継芯の弾性試験―
得られた中継芯について、実施例１と同様に弾性試験を行い、弾性荷重を求めた。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜１８ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であった。
-Elasticity test of relay core-
About the obtained relay core, the elasticity test was done like Example 1, and the elastic load was calculated | required.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 18 g with respect to the displacement amount 0 to 2.4 mm from the leading end portion of the relay core, and the elastic load y (g) of the relay core is the displacement amount x from the leading end portion of the relay core. (Mm), y = 10 × 2 or less.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の溝部と筆先の穴を嵌合させた。中継芯の外径Dｒは１．５ｍｍであり、筆先の後端部の穴の径Dｐ3（１．４ｍｍ）より大きいが、中継芯の有する弾力により、挿入可能である。
中継芯の溝部と筆先の後端部の穴が嵌合することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が２０ｍｍとなる。また、マウスピースの筆先後端固定部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは４ｍｍ（＝２０−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．５７となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the groove portion of the relay core and the hole of the brush tip were fitted. The outer diameter Dr of the relay core is 1.5 mm, which is larger than the diameter Dp 3 (1.4 mm) of the hole at the rear end of the writing tip, but can be inserted by the elasticity of the relay core.
When the groove of the relay core and the hole at the rear end portion of the writing tip are fitted, the length Lr 2 from the front end portion of the relay core to the rear end portion of the writing tip becomes 20 mm. In addition, the writing tip A is 7 mm (= 23.0-15-1) and the centering length B is 4 mm (= 20-15-15) when the writing tip rear end fixing portion of the mouthpiece comes into contact with the brim portion of the writing tip. 1), and the ratio of the centering length to the writing length (B / A) is 0.57.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を表２に示した。
実施例４のインクの流出量はふつう程度であり、筆感は良好であり、筆割れは見られなかった。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The outflow amount of the ink of Example 4 was normal, the writing feeling was good, and no cracking was observed.
（比較例１）
―中継芯―
単糸径が５ｄ（デニール）であるポリエステル繊維とウレタン樹脂から成る気孔率６０％の成形体について、先端側の外径Dｒ1を１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部から後端側に向かって１８ｍｍ（中継芯の先端部から筆先の後端部までの長さＬｒ2に相当）の位置までの外径Dｒ1を１．４ｍｍに、先端部をテーパー状に研磨し、段落とし形状部を有する中継芯を得た。この段落とし形状部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は１８ｍｍとなった。
(Comparative Example 1)
-Relay core-
For a molded article having a porosity of 60% made of polyester fiber and urethane resin having a single yarn diameter of 5d (denier), the outer diameter Dr 1 on the front end side is 1.5 mm, the total length Lr 1 is 31 mm, and the rear end The outer diameter Dr 1 from the position of 18 mm toward the end side (corresponding to the length Lr 2 from the leading end of the relay core to the trailing end of the writing tip) is 1.4 mm, and the tip is polished into a taper shape, A relay core having a shape portion as a paragraph was obtained. The length of the relay core covered by the writing tip, that is, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the writing tip is 18 mm due to the shape portion in this paragraph.
―中継芯の弾性試験―
得られた中継芯について、実施例１と同様に弾性試験を行い、弾性荷重を求めた。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜１２５ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、変位量が１ｍｍ以上の範囲ではｙ＝１０ｘ2以上であった。
-Elasticity test of relay core-
About the obtained relay core, the elasticity test was done like Example 1, and the elastic load was calculated | required.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 125 g with respect to the displacement 0 to 2.4 mm from the leading end of the relay core, and the elastic load y (g) of the relay core is the displacement x from the leading end of the relay core. With respect to (mm), y = 10 × 2 or more when the displacement amount was 1 mm or more.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の段落とし形状部に筆先の穴を当接させた。
中継芯の段落とし形状部に筆先の穴が当接することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が１８ｍｍとなる。また、マウスピースの筆先後端固定部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは２ｍｍ（＝１８−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．２９となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the hole of the brush tip was brought into contact with the shape portion as a paragraph of the relay core.
When the hole of the brush tip comes into contact with the shape portion as a paragraph of the relay core, the length Lr 2 from the front end portion of the relay core to the rear end portion of the brush tip becomes 18 mm. In addition, the writing tip A is 7 mm (= 23.0-15-1) and the centering length B is 2 mm (= 18-15-15) when the writing tip rear end fixing portion of the mouthpiece comes into contact with the brim portion of the writing tip. 1), and the ratio of the centering length to the writing length (B / A) is 0.29.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を表２に示した。
比較例１の筆感は良好であり、筆割れは見られなかったが、インクの流出量は不十分であった。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The writing feeling of Comparative Example 1 was good, and no brush cracks were seen, but the amount of ink outflow was insufficient.
（比較例２）
―中継芯―
単糸径が５ｄ（デニール）であるポリエステル繊維とウレタン樹脂から成る気孔率６０％の成形体について、先端側の外径Dｒ1を１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部から後端側に向かって２０ｍｍ（中継芯の先端部から筆先の後端部までの長さＬｒ2に相当）の位置までの外径Dｒ1を１．４ｍｍに、先端部をテーパー状に研磨し、段落とし形状部を有する中継芯を得た。この段落とし形状部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は２０ｍｍとなった。
(Comparative Example 2)
-Relay core-
For a molded article having a porosity of 60% made of polyester fiber and urethane resin having a single yarn diameter of 5d (denier), the outer diameter Dr 1 on the front end side is 1.5 mm, the total length Lr 1 is 31 mm, and the rear end Polishing the outer diameter Dr 1 to a position of 20 mm toward the end (corresponding to the length Lr 2 from the leading end of the relay core to the trailing end of the writing tip) to 1.4 mm, and the tip to a taper shape, A relay core having a shape portion as a paragraph was obtained. The length of the relay core covered with the writing tip, that is, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the writing tip is 20 mm due to the shape portion in this paragraph.
―中継芯の弾性試験―
得られた中継芯の弾性荷重は比較例１と同じである。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜１２５ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、変位量が１ｍｍ以上の範囲ではｙ＝１０ｘ2以上であった。
-Elasticity test of relay core-
The elastic load of the obtained relay core is the same as in Comparative Example 1.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 125 g with respect to the displacement 0 to 2.4 mm from the leading end of the relay core, and the elastic load y (g) of the relay core is the displacement x from the leading end of the relay core. With respect to (mm), y = 10 × 2 or more when the displacement amount was 1 mm or more.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の段落とし形状部に筆先の穴を当接させた。
中継芯の段落とし形状部に筆先の穴が当接することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が２０ｍｍとなる。また、マウスピースの後端部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは４ｍｍ（＝２０−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．５７となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the hole of the brush tip was brought into contact with the shape portion as a paragraph of the relay core.
When the hole of the tip of the brush is brought into contact with the shape portion of the relay core, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the writing tip becomes 20 mm. Further, when the rear end portion of the mouthpiece comes into contact with the brim portion of the writing tip, the writing length A is 7 mm (= 23.0-15-1), and the centering length B is 4 mm (= 20-15-1). Thus, the ratio of the centering length to the writing length (B / A) is 0.57.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を表２に示した。
比較例２のインクの流出量はふつう程度であったが、筆感は不良であり、筆割れが見られた。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The outflow amount of the ink in Comparative Example 2 was normal, but the writing feeling was poor and cracking of the brush was observed.
（比較例３）
―中継芯―
単糸径が５ｄ（デニール）であるアクリル繊維とメラミン樹脂から成る気孔率６０％の成形体について、先端側の外径Dｒ1を１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部から後端側に向かって２０ｍｍ（中継芯の先端部から筆先の後端部までの長さＬｒ2に相当）の位置までの外径Dｒ1を１．４ｍｍに、先端部をテーパー状に研磨し、段落とし形状部を有する中継芯を得た。この段落とし形状部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は２０ｍｍとなった。
(Comparative Example 3)
-Relay core-
For a molded article having a porosity of 60% made of acrylic fiber and melamine resin having a single yarn diameter of 5d (denier), the outer diameter Dr 1 on the front end side is 1.5 mm, the total length Lr 1 is 31 mm, and the rear end Polishing the outer diameter Dr 1 to a position of 20 mm toward the end (corresponding to the length Lr 2 from the leading end of the relay core to the trailing end of the writing tip) to 1.4 mm, and the tip to a taper shape, A relay core having a shape portion as a paragraph was obtained. The length of the relay core covered with the writing tip, that is, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the writing tip is 20 mm due to the shape portion in this paragraph.
―中継芯の弾性試験―
得られた中継芯について、実施例１と同様に弾性試験を行い、弾性荷重を求めた。 結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜１８９ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、変位量が１ｍｍ以上の範囲ではｙ＝１０ｘ2以上であった。
-Elasticity test of relay core-
About the obtained relay core, the elasticity test was done like Example 1, and the elastic load was calculated | required. The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 189 g with respect to the displacement 0 to 2.4 mm from the leading end of the relay core, and the elastic load y (g) of the relay core is the displacement x from the leading end of the relay core. With respect to (mm), y = 10 × 2 or more when the displacement amount was 1 mm or more.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の段落とし形状部に筆先の穴を当接させた。
中継芯の段差部分に筆先の穴が当接することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が２０ｍｍとなる。また、マウスピースの後端部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは４ｍｍ（＝２０−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．５７となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the hole of the brush tip was brought into contact with the shape portion as a paragraph of the relay core.
When the hole of the brush tip comes into contact with the step portion of the relay core, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the brush tip becomes 20 mm. Further, when the rear end portion of the mouthpiece comes into contact with the brim portion of the writing tip, the writing length A is 7 mm (= 23.0-15-1), and the centering length B is 4 mm (= 20-15-1). Thus, the ratio of the centering length to the writing length (B / A) is 0.57.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を表２に示した。
比較例３のインクの流出量はふつう程度であったが、筆感は不良であり、筆割れが見られた。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The outflow amount of the ink of Comparative Example 3 was normal, but the writing feeling was poor and cracking of the brush was observed.
（比較例４）
―中継芯―
単糸径が３ｄ（デニール）であるナイロン繊維とウレタン樹脂から成る気孔率７４％の成形体について、外径Dｒを１．５ｍｍに、全長Lｒ1を３１ｍｍに、先端部をテーパー状に研磨し、中継芯の先端部から１７〜１８ｍｍの位置に幅１ｍｍ、深さ０．１ｍｍの溝部を有する中継芯を得た。この溝部により、筆先に覆われる中継芯の長さすなわち中継芯の先端部から筆先の後端部までの長さLｒ2は１８ｍｍとなった。
(Comparative Example 4)
-Relay core-
For a 74% porosity molded body made of nylon fiber and urethane resin with a single yarn diameter of 3d (denier), the outer diameter Dr is 1.5 mm, the total length Lr 1 is 31 mm, and the tip is polished in a taper shape. A relay core having a groove portion having a width of 1 mm and a depth of 0.1 mm at a position of 17 to 18 mm from the distal end portion of the relay core was obtained. With this groove, the length of the relay core covered by the brush tip, that is, the length Lr 2 from the leading end portion of the relay core to the rear end portion of the brush tip is 18 mm.
―中継芯の弾性試験―
得られた中継芯の弾性荷重は実施例１と同じである。
結果を、表１及び図６に示した。
中継芯の先端部からの変位量０〜２．４ｍｍに対して、弾性荷重は０〜６ｇの範囲にあり、中継芯の弾性荷重ｙ（ｇ）は、中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であった。
-Elasticity test of relay core-
The elastic load of the obtained relay core is the same as in Example 1.
The results are shown in Table 1 and FIG.
The elastic load is in the range of 0 to 6 g with respect to the displacement amount 0 to 2.4 mm from the leading end portion of the relay core, and the elastic load y (g) of the relay core is the displacement amount x from the leading end portion of the relay core. (Mm), y = 10 × 2 or less.
―筆先―
実施例１と同じものを使用した。
-Brush tip-
The same as in Example 1 was used.
―マウスピース―
実施例１と同じものを使用した。
―Mouthpiece―
The same as in Example 1 was used.
―筆先ユニットの組み付け―
マウスピースの後端部から筆先を挿入し、筆先のツバ部とマウスピースの筆先後端固定部を当接させた。次に、筆先の穴に中継芯を挿入し、中継芯の溝部と筆先の穴を嵌合させた。中継芯の外径Dｒは１．５ｍｍであり、筆先の後端部の穴の径Dｐ3（１．４ｍｍ）より大きいが、中継芯の有する弾力により、挿入可能である。
中継芯の溝部と筆先の後端部の穴が嵌合することにより、中継芯の先端部から筆先の後端部までの長さLｒ2が１８ｍｍとなる。また、マウスピースの筆先後端固定部が筆先のツバ部に当接することにより、筆出長Ａは７ｍｍ（＝２３．０−１５−１）、芯出長Ｂは２ｍｍ（＝１８−１５−１）となり、筆出長に対する芯出長の比率（Ｂ／Ａ）は０．２９となる。
組み付けられた筆先ユニットを、粘度６．９ｃｐｓ、比重１．０５、ｐＨ８．３の顔料インク０．７ｇが充填された中綿（単糸径１５ｄ、空隙率８０％）を格納した容器に組み込んで、筆記試験を行った。
―Assembling the brush tip unit―
The brush tip was inserted from the rear end portion of the mouthpiece, and the brim portion of the brush tip and the brush tip rear end fixing portion of the mouthpiece were brought into contact with each other. Next, the relay core was inserted into the hole of the brush tip, and the groove portion of the relay core and the hole of the brush tip were fitted. The outer diameter Dr of the relay core is 1.5 mm, which is larger than the diameter Dp 3 (1.4 mm) of the hole at the rear end of the writing tip, but can be inserted by the elasticity of the relay core.
By fitting the groove of the relay core and the hole at the rear end of the writing tip, the length Lr 2 from the leading end of the relay core to the rear end of the writing tip becomes 18 mm. In addition, the writing tip A is 7 mm (= 23.0-15-1) and the centering length B is 2 mm (= 18-15-15) when the writing tip rear end fixing portion of the mouthpiece comes into contact with the brim portion of the writing tip. 1), and the ratio of the centering length to the writing length (B / A) is 0.29.
The assembled brush unit is assembled in a container containing batting (single yarn diameter 15d, porosity 80%) filled with 0.7 g of pigment ink having a viscosity of 6.9 cps, a specific gravity of 1.05, and a pH of 8.3. A written test was conducted.
―筆記試験―
実施例１と同様に筆記試験を行い、結果を、表２に示した。
比較例５の筆感は良好であり、筆割れは見られなかったが、インクの流出量は不十分であった。
-written examination-
A writing test was conducted in the same manner as in Example 1, and the results are shown in Table 2.
The writing feeling of Comparative Example 5 was good and no brush cracks were seen, but the amount of ink outflow was insufficient.
表１及び図６に、実施例及び比較例に使用した中継芯の変位量に対する弾性荷重の結果を示す。 In Table 1 and FIG. 6, the result of the elastic load with respect to the displacement amount of the relay core used for the Example and the comparative example is shown.
表２に、実施例及び比較例の、インクの流出量、筆感及び筆割れの有無の評価結果を示す。 Table 2 shows the evaluation results of the amount of ink outflow, writing feeling, and presence / absence of writing cracks in Examples and Comparative Examples.
以上のように、中継芯と、筆先と、マウスピースを備える筆先ユニットにおいて、先端部分を筆先に覆われて配置される中継芯の弾性荷重を調整することにより、かつ、該中継芯の筆先への芯出量を調整することにより、筆感を高めることが可能となる。この発明により、モノフィラメントの複雑な設計変更の必要がなく、コストを抑えて筆感を高めた筆先ユニットを製造することができる。本筆先ユニットを収納した液体塗布具は、きれいな線を意図したようにしなやかに描けるものであり、使い勝手がよく高度な筆感を求めるユーザーのニーズに沿った筆記具や化粧用具として、広く応用されることが期待される。 As described above, in a brush tip unit including a relay core, a brush tip, and a mouthpiece, by adjusting the elastic load of the relay core arranged with the tip portion covered by the brush tip, and to the brush tip of the relay core By adjusting the centering amount, the writing feeling can be enhanced. According to the present invention, there is no need for complicated design change of the monofilament, and it is possible to manufacture a writing tip unit with a reduced cost and improved writing feeling. The liquid applicator that houses the brush tip unit can be used to draw beautiful lines as intended, and is widely used as a writing instrument and makeup tool that meets the needs of users who require a high degree of ease of use and ease of use. It is expected.
１ 筆先ユニット
２ 中継芯
２ａ 溝部
２ｂ 段落とし形状部
３ 筆先
３ａ ツバ部
４ マウスピース
４ａ 筆先後端固定部
Ａ 筆出長
Ｂ 芯出長
Ｌｒ1 中継芯の全長
Ｌｒ2 中継芯の先端部から筆先の後端部までの長さ
Ｄｒ 中継芯の外径
Ｄｒ1 中継芯の先端側の外径
Ｄｒ2 中継芯の後端側の外径
Ｌｐ1 筆先の全長
Ｄｐ1 筆先の根本径
Ｄｐ2 筆先のツバ部の外径
Ｄｐ3 筆先の穴の径
Ｌｍ1 マウスピースの先端部から筆先後端固定部までの長さ
Ｄｍ1 マウスピースの先端部の内径
Ｄｍ2 マウスピースの筆先後端固定部の先端側内径
Ｄｍ3 マウスピースの筆先後端固定部の後端側内径
DESCRIPTION OF SYMBOLS 1
Claims (9)
先端部分がテーパー加工されたモノフィラメントで構成され、前記中継芯の先端部分の外周を覆うように設けられた筆先と、
前記筆先の穂先を除く先端部分の外周を覆うように設けられたマウスピースと、
を備え、
前記筆先の後端部に前記中継芯の先端部分を挿入可能な穴が設けられ、
前記中継芯の弾性荷重ｙ（ｇ）が、前記中継芯の先端部からの変位量ｘ（ｍｍ）に対し、ｙ＝１０ｘ2以下であり、
前記マウスピースの穂先側先端部から前記筆先の先端部までの長さＡ（ｍｍ）に対する、前記マウスピースの穂先側先端部から前記中継芯の先端部までの長さＢ（ｍｍ）の比率（Ｂ／Ａ）が、０．３以上であることを特徴とする筆先ユニット。 A relay core whose tip is polished in a tapered shape;
The tip is composed of a monofilament with a tapered tip, and a brush tip provided to cover the outer periphery of the tip of the relay core;
A mouthpiece provided to cover the outer periphery of the tip portion excluding the tip of the brush tip;
With
A hole into which the leading end portion of the relay core can be inserted at the rear end portion of the writing tip,
The elastic load y (g) of the relay core is y = 10 × 2 or less with respect to the displacement amount x (mm) from the tip of the relay core,
Ratio of length B (mm) from the tip end of the mouthpiece to the tip of the relay core to the length A (mm) from the tip of the mouthpiece to the tip of the writing tip ( B / A) is a brush tip unit characterized by being 0.3 or more.
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| JP2016215307A JP6804267B2 (en) | 2016-11-02 | 2016-11-02 | Brush tip unit and liquid coating tool using the brush tip unit |
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| JP2016215307A JP6804267B2 (en) | 2016-11-02 | 2016-11-02 | Brush tip unit and liquid coating tool using the brush tip unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303798A (en) * | 2019-07-16 | 2019-10-08 | 湖州善琏永和风笔斋 | A kind of manufacture craft of peacock writing brush |
| JP2021010610A (en) * | 2019-07-05 | 2021-02-04 | 株式会社トキワ | container |
| JP2021175596A (en) * | 2020-05-01 | 2021-11-04 | 株式会社呉竹 | Brush pen and manufacturing method thereof |
| KR20220058368A (en) * | 2020-10-30 | 2022-05-09 | 후 바비 | Measuring method for writing brush classification and the specification matrix table thereof |
| WO2023106015A1 (en) * | 2021-12-06 | 2023-06-15 | テイボー株式会社 | Brush tip unit, production method for brush tip unit, and liquid applicator using brush tip unit |
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| JPS60107395A (en) * | 1983-11-16 | 1985-06-12 | 益山興業株式会社 | Writing brush |
| JP2009269251A (en) * | 2008-05-02 | 2009-11-19 | Ikeda Corp | Brush tip structure of writing implement |
| JP2014148082A (en) * | 2013-01-31 | 2014-08-21 | Pentel Corp | Applicator |
| JP2015000535A (en) * | 2013-06-17 | 2015-01-05 | セーラー万年筆株式会社 | Brush pen |
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| JPS60107395A (en) * | 1983-11-16 | 1985-06-12 | 益山興業株式会社 | Writing brush |
| JP2009269251A (en) * | 2008-05-02 | 2009-11-19 | Ikeda Corp | Brush tip structure of writing implement |
| JP2014148082A (en) * | 2013-01-31 | 2014-08-21 | Pentel Corp | Applicator |
| JP2015000535A (en) * | 2013-06-17 | 2015-01-05 | セーラー万年筆株式会社 | Brush pen |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021010610A (en) * | 2019-07-05 | 2021-02-04 | 株式会社トキワ | container |
| CN110303798A (en) * | 2019-07-16 | 2019-10-08 | 湖州善琏永和风笔斋 | A kind of manufacture craft of peacock writing brush |
| JP2021175596A (en) * | 2020-05-01 | 2021-11-04 | 株式会社呉竹 | Brush pen and manufacturing method thereof |
| JP7441503B2 (en) | 2020-05-01 | 2024-03-01 | 株式会社呉竹 | Brush pen and its manufacturing method |
| KR20220058368A (en) * | 2020-10-30 | 2022-05-09 | 후 바비 | Measuring method for writing brush classification and the specification matrix table thereof |
| KR102478407B1 (en) * | 2020-10-30 | 2022-12-16 | 후 바비 | Measuring method for writing brush classification and the specification matrix table thereof |
| WO2023106015A1 (en) * | 2021-12-06 | 2023-06-15 | テイボー株式会社 | Brush tip unit, production method for brush tip unit, and liquid applicator using brush tip unit |
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| JP6804267B2 (en) | 2020-12-23 |
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