JP4859282B2 - Direct liquid writing instrument - Google Patents

Description

【００３３】
【表２】

【００３４】
＜実施例１＞
断面櫛歯形の成形体よりなる一時インキ貯溜部、及び繊維束体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、表面張力が２２ｍＮ／ｍ、密度０．８ｇ／ｃｃのエタノール系インキｉを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００３５】
＜実施例２＞
断面櫛歯形の成形体よりなる一時インキ貯溜部、及び樹脂微粒子の焼結体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００３６】
＜実施例３＞
断面櫛歯形の成形体よりなる一時インキ貯溜部、及び枚葉体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００３７】
＜実施例４＞
枚葉体よりなる一時インキ貯溜部、及び繊維束体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性の第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００３８】
＜実施例５＞
枚葉体よりなる一時インキ貯溜部、及び樹脂微粒子の焼結体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００３９】
＜実施例６＞
枚葉体よりなる一時インキ貯溜部、及び枚葉体よりなるインキ補給体によって後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４０】
＜実施例７＞
繊維束体からなる一時インキ貯溜部、及び繊維束体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平な姿勢にして筆記した結果を示している。
【００４１】
＜実施例８＞
繊維束体の多孔体からなる一時インキ貯溜部、及び樹脂微粒子からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４２】
＜実施例９＞
繊維束体の多孔体からなる一時インキ貯溜部、及び枚葉体よりなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４３】
＜実施例１０＞
樹脂微粒子の焼結体の多孔体からなる一時インキ貯溜部、及び繊維束体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４４】
＜実施例１１＞
樹脂微粒子の焼結体の多孔体からなる一時インキ貯溜部、樹脂微粒子の焼結体からなるインキ補給体により後部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４５】
＜実施例１２＞
樹脂微粒子の焼結体の多孔体からなる一時インキ貯溜部、及び枚葉体からなるインキ補給体により底部壁を形成したものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４６】
＜比較例１＞
断面櫛歯形の成形体からなる一時インキ貯溜部、かつ、インキ補給体を設けていないものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４７】
＜比較例２＞
一時インキ貯溜部を枚葉体で形成し、かつ、インキ補給体を設けていない構成のものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果である。
【００４８】
＜比較例３＞
一時インキ貯溜部が繊維束体からなる多孔体で形成し、かつ、インキ補給体を設けていないものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした筆記姿勢にして筆記した結果を示している。
【００４９】
＜比較例４＞
一時インキ貯溜部が樹脂微粒子からなる多孔体であり、かつ、インキ補給体を設けていないものであり、第１，第２のインキタンク室６，７内に、上記のものと同じ物性のエタノール系インキを、その第１，第２のインキタンク室６，７の全容量の１／４だけ充填し、ペン芯１５を水平にした姿勢にして筆記した結果を示している。
【００５０】
次に、本発明の第２の実施形態に係る直液式筆記具Ｂについて、図４を参照して説明する。
この直液式筆記具Ｂは、上記第１の実施形態に係る直液式筆記具Ａとほぼ同等の構成のものであるが、直液式筆記具Ａにおいては、後部壁１２自体をインキ補給体によって形成していたのに対し、後部壁１２′をインキ補給体で形成することなく、その後部壁１２′とは別に、枚葉体又は断面櫛歯形に形成したインキ補給体１６を、その後部壁１２′近傍のインキ誘導芯９の後端部に嵌装した構成のものである。
なお、第１の実施形態に係る直液式筆記具Ａにおいて説明したものと同等のものについては同一の符号を付して、それらの説明を省略する。
【００５１】
本発明の第３の実施形態に係る直液式筆記具Ｃについて、図５を参照して説明する。
この直液式筆記具Ｃは、上記第１の実施形態に係る直液式筆記具Ａとほぼ同等の構成のものであるが、第２のインキタンク室７′を区画する側壁１７を、前部壁１１から後部壁１２近傍に延出した長さに形成するとともに、後側インキ溜め６ｂ′に面する部分であって区画壁１３の至近位置に、その後側インキ溜め６ｂ′に滞留されているインキを、第２のインクタンク室７内に流入させるための、インキ流入口である３つのインキ流入孔１７ａ…を形成したものである。なお、図５には、３つのインキ流入孔１７ａ…のうち、１つだけを示している。
【００５２】
上記インキ流入孔１７ａ…と、区画壁１３に形成したインキ流通口である切欠き１３ａ，１３ａとの関係は、そのインキ流入孔１７ａ…を介して、後側インク溜め６ｂ′から第２のインキタンク室６にインキが流入し終えるまでの間、その後側インキ溜め６ｂ′内にインキを滞留させておける関係にして形成している。具体的には、インキ流入孔１７ａ…の断面積を切欠き１３ａ，１３ａの断面積よりも大きく形成している。
なお、第１の実施形態に係る直液式筆記具Ａにおいて説明したものと同等のものについては同一の符号を付して、それらの説明を省略する。
【００５３】
図６に区画壁の他例を示す。
この他例に係る区画壁１８は、軸心Оに一致して、インキ誘導芯９の外径に一致する芯嵌挿孔１８ａを形成するとともに、その軸Оを中心として、平面略扇形の４つのインキ流通孔１８ｂ…を９０°間隔で形成した円板形のものであり、これを、例えば枚葉体、繊維束体、又は多孔体である樹脂，金属，セラミックス等の微粒子焼結体を円板状に成形したインキ補給体により形成したものである。
【００５４】
上記においては、第１のインキタンク室の後端面を閉じる後部壁や区画壁等をインキ補給体で形成した例について説明したが、これらに限らず、例えば第１のインキタンク室の前端面を閉じる前部壁をインキ補給体で形成した構成にしてもよい。すなわち、本発明は、インキタンク部内のインキがインキ誘導芯に接触しない筆記姿勢にしたとき、そのインキタンク部内のインキに接触する位置に、そのインキを吸収しかつ吸収したインキをインキ誘導芯に補給するためのインキ補給体を配設した構成になっていればよいものである。
【００５５】
上記においては、円筒形の第１のインキタンク室と、同じく円筒形の第２のインキタンク室とを同心円配置にしている例について説明したが、第１のインキタンク室に対して、第２のインキタンク室を偏心させた状態で配設してもよく、また、側壁の平面形状も円形に限らず、楕円形，多角形等公知の形に形成することができる。
【００５６】
上記においては、インキ流入口を、第１のインキタンク室の容積と、第２のインキタンク室の容積とを合わせた全容積を均分する位置に配設した例について説明したが、第１のインキタンク室の容積と、第２のインキタンク室の容積とを合わせた全容積のほぼ２０％〜９０％の体積を満たすインキの液面にほぼ一致する位置に、インキ流入口を配設してもよい。
【００５７】
上記においては、一時インキ貯溜部を、略円板形の複数の枚葉体を所要の間隙を保持して積重してなる所謂枚葉型のものをインキ誘導芯と別体にして形成した例について説明したが、例えば、繊維束体、樹脂，金属，セラミックス等の微粒子焼結体の多孔体、枚葉体、又は断面櫛歯形の成形体等により形成してもよい。
また、上記においては、一時インキ貯溜部をインキ誘導芯と別体にして形成した例について説明したが、インキ誘導芯と一時インキ貯溜部とを一体に形成してもよい。
【００５８】
上記においては、第１のインキタンク室内を、前側インキ溜めと後側インキ溜めとに二分する区画壁を設けるとともに、その区画壁に、前側，後側インキ溜め間でインキを流通させるためのインキ流通口を形成した例について説明したが、区画壁は必ずしも設ける必要はない。
【００５９】
【発明の効果】
請求項１〜６記載の発明によれば、次の効果を得ることができる。
一時インキ貯留部の貯留容積は、第２のインキタンク室の容積に従って設定することができるようになり、インキタンク部全体の容積を大きくしても、従ってまた、比較的大量のインキをインキタンク部内に貯留したときにも、一時インキ貯留部の貯留容積を、インキタンク部全体のインキ量に従って大きく設定する必要がない。
また、第１のインキタンク室内に、前側インキ溜めと後側インキ溜めとに二分する区画壁を設けるとともに、その区画壁に、前側インキ溜と後側インキ溜めとの間でインキを流通させるためのインキ流通口を形成しているので、前側インキ溜めに滞留していたインキを、区画壁のインキ流通口を通じて後側インキ溜めに流入させられるとともに、後側インキ溜めに滞留するインキを、上記インキ流入口から、第２のインキタンク室内に流入させやすくなる。
【００６０】
インキ誘導芯にインキが接触しない筆記姿勢にしたとき、インキ補給体に吸収されているインキを、インキ誘導芯に補給できるので、直液式筆記具自体を、どのような筆記姿勢にしたときにも連続した筆記を良好に行なうことができる。
【００６１】
第２のインキタンク室にインキ流入口を形成していることにより、前部壁からインキ流入口までの、その第２のインキタンク室の容積から、その前部壁からインキ流入口までのインキ誘導芯の体積を除したインキ量を勘案して、一時インキ貯留部のインキ貯留容積を設定することができる。
このため、一時インキ貯留部のインキ貯留容積をさらに小さく設定できるとともに、上記インキ流入口を通じて、後側インキ溜め内に滞留しているインキを、第２のインキタンク室内に供給することができ、インキ誘導芯へのインキの供給を良好に行うことができるとともに、インキ誘導芯の前部を上向きの起立姿勢にしたときのインキの吹き出しを抑制できる。
【００６２】
請求項１〜６記載の発明で得られる上記共通の効果に加え、各請求項記載の発明によれば次の効果を得ることができる。
請求項２記載の発明によれば、第１のインキタンク室の後端面を閉じる後部壁をインキ補給体で形成しているので、インキタンク部内に、インキ補給体を設ける必要がなく、そのインキタンク部の容積を有効に活用できる。
【００６３】
請求項３記載の発明によれば、第１のインキタンク室の前端面を区画する上記前部壁をインキ補給体で形成しているので、請求項２記載の発明と同様に、インキタンク部内に、インキ補給体を設ける必要がなく、そのインキタンク部の容積を有効に活用できる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態に係る直液式筆記具の概略構造を示す断面図である。
【図２】（Ａ）は、図１に示すＩ‐Ｉ線に沿う断面図、同じく（Ｂ）はＩＩ‐ＩＩ線に沿う断面図、（Ｃ）はＩＩＩ‐ＩＩＩ線に沿う断面図である。
【図３】同上の直液式筆記具を水平な筆記姿勢にした状態の断面図である。
【図４】本発明の第２の実施形態に係る直液式筆記具の概略構造を示す断面図である。
【図５】本発明の第３の実施形態に係る直液式筆記具の概略構造を示す断面図である。
【図６】区画壁の他例を示す平面図である。
【図７】従来の直液式筆記具の概略構造を示す断面図である。
【符号の説明】
５ 一時インキ貯溜部
６ 第１のインキタンク室
６ａ 前側インキ溜め
６ｂ 後側インキ溜め
７ 第２のインキタンク室
７ａ インキ流入口
８ インキタンク部
９ インキ誘導芯
１１ 前部壁
１２ インキ補給体である後部壁
１３ 区画壁
１３ａ インキ流通口
１５ ペン芯
ｉ インキ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a direct liquid writing instrument such as a marking pen.
[0002]
[Prior art]
Conventionally, as this type of direct liquid type writing instrument, there is one disclosed in, for example, Japanese Patent Publication No. 6-510491.
The direct liquid writing instrument includes an ink guide core in which a rear portion 3a is inserted into a shaft cylinder 2 in which a single ink tank 1 for containing ink i is formed and an opening 1b formed in a front side wall 1a of the ink tank 1. 3 and a temporary ink reservoir 4 fitted to the ink guide core 3. In particular, the capillary capacity of the temporary ink reservoir 4 is set to the ink guide core 3 near the opening 1 a of the ink tank 1. By making it smaller than the capillary capacity of the ink tank 1, the ink tank 1 functions reliably even when the volume of the ink tank 1 is larger than that of the known one, and leakage of ink i from the front wall 3 b of the ink guide core 3 is prevented. This is what I tried to prevent.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional direct liquid writing instrument does not contact the ink i with the ink guide core 3, but, for example, when it is in a substantially horizontal writing posture, the liquid level of the ink i in the ink tank 1 decreases as indicated by ia. Alternatively, when the amount of ink i stored in the ink tank 1 is small, the ink i does not contact the ink guide core 3.
In such a case, the ink i is not replenished to the ink guide core 3 during writing, so that there is a drawback that the ink i is swollen.
[0004]
In addition, as the capacity of the ink tank 1 increases, the space volume in the ink tank 1 inevitably increases. In this case, the volume expansion of the space volume further increases due to changes in temperature and pressure. Increase.
[0005]
That is, if the storage volume of the temporary ink reservoir 4 is not increased in accordance with the increase in the volume expansion of the space volume, ink leaks from the tip 3b of the ink guide core 3, but the temporary ink reservoir 4 is When the cross-sectional structure is comb-shaped, the molding process becomes difficult as the ink storage capacity increases, and when the structure adopts a porous body or a single sheet, the cost increases and the ink storage capacity increases. There is a disadvantage that there is a limit in increasing.
[0006]
Accordingly, the present invention eliminates the need to increase the storage capacity of the temporary ink storage unit as the ink tank volume increases, and can suppress ink blowing out in a standing posture with the pen core facing upward, and writing. The purpose is to provide a direct liquid writing instrument that can perform continuous writing regardless of posture.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention has the following configuration.
  The present invention includes a temporary ink reservoir, a first ink tank chamber,AndA second ink tank chamber provided with an ink inlet for allowing the ink stored therein to flow in.By the front wall orthogonal to the axial direction, its ink inlet, and the side wall parallel to the axial directionCompartment formation,These ink tank chambers are front and rear and parallelConnected toThe temporary ink storage section and these ink tank chambers are connected to the front and back.And
  A partition wall that bisects the front ink reservoir and the rear ink reservoir is provided in the first ink tank chamber, and ink is placed between the front ink reservoir and the rear ink reservoir on the partition wall. Form an ink distribution port for distribution,
  The second ink tank chamber and,The temporary ink reservoirAnd a rear ink reservoir in the first ink tank chamber;The ink guide core is disposed through the
  When the ink in the ink tank is in a writing posture so as not to contact the ink guide core, the ink is absorbed into the position in contact with the ink in the ink tank and the absorbed ink is supplied to the ink guide core. An ink replenishing body is provided, and is a direct liquid type writing instrument.
[0008]
In the above configuration, a partition wall that divides the first ink tank chamber into a front ink reservoir and a rear ink reservoir is provided, and the partition wall is provided between the front ink reservoir and the rear ink reservoir. An ink distribution port for distributing ink is formed. Thus, the ink staying in the front ink reservoir can be caused to flow into the rear ink reservoir through the ink circulation port of the partition wall, and the ink staying in the rear ink reservoir can be supplied from the ink inlet to the second ink reservoir. It becomes easy to flow into the ink tank chamber.
Also,In the above configuration, only the ink in the second ink tank chamber is supplied to the ink guide core, and the storage volume of the temporary ink storage unit can be set according to the volume of the second ink tank chamber. In other words, even if the volume of the entire ink tank is increased, and therefore when a relatively large amount of ink is stored in the ink tank, the storage volume of the temporary ink storage is set to be large according to the capacity of the ink tank. There is no need to do.
  Also, when the writing posture is such that the ink does not contact the ink guide core, the ink absorbed by the ink supply body can be supplied to the ink guide core, so when the direct liquid writing instrument itself is in any writing posture In addition, continuous writing can be performed well.
[0009]
  The present inventionInthe aboveThe rear wall that closes the rear end face of the first ink tank chamberIt is formed with an ink supply body, and the rear end of the ink guide core is in close contact with this.Orthe aboveThe front edge of the first ink tank chamberThe ink guide core is inserted into the front wall to be partitioned,The front wall is made of ink supplyTo the configurationBy doing so, it is not necessary to provide a separate ink supply body in the ink tank chamber, and the volume of the ink tank chamber can be effectively utilized.
[0011]
The ink supply body can be formed of a sheet, a fiber bundle, a porous body, or the like.
[0012]
The temporary ink reservoir can be formed separately from the ink guide core, and can be formed from a porous body including a fiber bundle or the like, a sheet body, or a molded article having a cross-sectional comb shape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view showing a schematic structure of a direct liquid writing instrument according to the first embodiment of the present invention, FIG. 2A is a cross-sectional view taken along the line II shown in FIG. 1, and FIG. Is a sectional view taken along line II-II, and (C) is a sectional view taken along line III-III.
[0014]
The direct liquid writing instrument A according to the first embodiment of the present invention includes a temporary ink storage unit 5 and an ink tank unit 8 formed by partitioning the first and second ink tank chambers 6 and 7 in the front-rear direction. A writing instrument main body 10 which is provided in series and has an ink guide core 9 disposed through the second ink tank chamber 7 and the temporary ink reservoir 5 and a cap (not shown). .
[0015]
  The first ink tank chamber 6 is formed, for example, in a cylindrical shape having an inner diameter of about 20 mm and a total length of about 70 mm.PartitionedThe rear end surface is closed by the rear wall 12.
[0016]
In this embodiment, the rear wall 12 only needs to absorb the ink in the ink tank portion 8 and replenish the absorbed ink to the ink guide core 9, for example, a sheet body, a fiber bundle, or It is formed by an ink replenishing body in which a porous sintered body of resin, metal, ceramics, etc., rubber, sponge or the like is formed into a disk shape.
[0017]
In the first ink tank chamber 6, the total volume of the volume of this and the volume of the second ink tank chamber 7, which will be described in detail later, is approximately equalized. A partition wall 13 is disposed at a position between the front ink reservoir 6a and the rear ink reservoir 6b on both sides of the partition wall 13.
[0018]
As shown in FIG. 2 (B), the partition wall 13 is provided with notches 13a and 13a (same cross-sectional area as two circular holes with an inner diameter of 3 mm), which are flat trapezoidal ink circulation ports, at opposite positions across the axis О. The disk is formed, and the ink can be circulated between the front ink reservoir 6a and the rear ink reservoir 6b through the notches 13a and 13a.
[0019]
The second ink tank chamber 7 has an inner diameter of about 6 mm, for example, and is partitioned by a side wall 14 formed in a cylindrical shape with a length from the front wall 11 to the partition wall 13. The tank chamber 6 and the axis O are concentrically arranged.
[0020]
An ink inlet 7a is formed at the rear end surface of the second ink tank chamber 7, and a core through-hole 11a for passing an ink guide core 9 described later in detail is formed on the front wall 11 along the axis О. And an air hole (not shown) having an inner diameter of about 0.1 mm for air replacement is formed in the vicinity of the axis О.
[0021]
  The ink guide core 9 is formed by converging a fiber bundle made of polyester, for example, into a cylindrical shape having a diameter of about 2 mm.end9a is in close contact with the rear wall 12 of the first ink tank chamber 6, and the tip 9b is formed to have a length that allows it to protrude forward through a temporary ink reservoir 5 described later in detail. .
[0022]
A pen core 15 is disposed at the front end of the ink guide core 9 and is formed by converging a fiber bundle made of, for example, polyester into a cylindrical shape having a diameter of about 5 mm.
[0023]
The temporary ink reservoir 5 is a so-called single-wafer type that is formed by stacking a plurality of substantially disc-shaped sheet bodies 5a with a gap of about 0.2 mm. The storage volume is about 1.1 cc, which is the same as the volume of the second ink tank chamber 7.
[0024]
The operation of the direct liquid writing instrument A according to the first embodiment having the above-described configuration will be described. It is assumed that the first and second ink tanks 6 and 7 are filled with about 1/4 of the total volume of ethanol ink.
When the writing instrument body 10 is in a writing posture with its pen core 15 facing upward, the ink staying in the front ink reservoir 6a passes through the notches 13a and 13a, which are ink distribution ports of the partition wall 13, and the rear ink. It flows out to the reservoir 6b.
[0025]
Next, when the writing instrument body 10 is in a writing posture with the pen core 15 facing downward, the ink staying in the rear ink reservoir 6b passes through the notches 13a and 13a of the partition wall 13 and the front ink. At the same time as it flows into the reservoir 6 a, it flows into the second ink tank chamber 7 from the ink inlet 7 a of the second ink tank chamber 7.
[0026]
That is, in the present embodiment, in the writing posture with the pen core 15 facing downward, the storage volume Vc of the temporary ink storage unit 5 may be set according to the volume V2 of the second ink tank chamber 7, and more specifically, It is only necessary to consider the amount of ink obtained by dividing the volume V2 of the second ink tank chamber 7 by the volume Vp ′ of the ink guide core 9 from the front wall 11 to the ink inlet 7a of the second ink chamber 7. is there.
[0027]
That is, since the ink stored in the second ink tank chamber 7 is not stored beyond the ink inlet 7a, the ink from the second ink tank chamber 7 is changed even when the temperature or pressure changes. This is because the amount of ink pushed out to the temporary ink reservoir 5 does not exceed V2−Vp ′.
[0028]
Further, when the ink level is lower than the ink inlet 7 a of the second ink tank chamber 7, the amount of ink pushed out is greater than the amount of ink that can be stored in the second ink tank chamber 7. In this case, the ink storage amount of the temporary ink storage unit 5 is not exceeded.
[0029]
By the way, when the ink storage amount in the ink tank unit 8 is small, when the writing instrument body 10 is set to a substantially horizontal writing posture with the pen core 15 turned sideways, as shown in FIG. The liquid level ia of the ink i is located below the ink guide core 9 and the ink in the ink tank portion 8 cannot be directly supplied to the ink guide core 9.
However, in the present embodiment, when the ink i in the ink tank portion 8 is in a writing posture in which the ink i does not contact the ink guide core 9, the rear wall 12 at the position in contact with the ink in the ink tank portion 8 is inked. Since it is formed by the replenisher, the ink i in the ink tank portion 8 always contacts the rear wall 12 even when the pen core 15 is in a substantially horizontal writing posture.
[0030]
  Thereby, when the liquid level ia of the ink i is located below the ink guide core 9, in other words, the ink guide core 9 is immersed in the ink stored in the ink tank portion 8. Even if not, after the ink guide core 9 in close contact with the rear wall 12 formed by the ink supply bodyendFrom 9a, the ink absorbed in the rear wall 12 can be supplied to the ink guide core 9.
[0031]
Next, Table 1 shows experimental results of the direct liquid writing instrument A according to the first embodiment having the above-described configuration.
Examples 1 to 11 shown in Table 1 show the experimental results under the conditions shown in Table 2, and Comparative Examples 1 to 4 are the same as the direct liquid writing instrument A according to the first embodiment. The experiment results are shown for the configuration in which the rear wall is not formed by the ink supply body. The examples and comparative examples indicated by the same writing instrument number are examples in which the ink guide core and the temporary ink reservoir are made of the same material, and the rear wall is formed by the ink supply body. A configuration in which the rear wall is not formed of an ink supply body is a comparative example.
[0032]
[Table 1]

[0033]
[Table 2]

[0034]
<Example 1>
The rear wall is formed by a temporary ink reservoir portion formed of a comb-shaped molded body and an ink supply body formed of a fiber bundle, and surface tension is present in the first and second ink tank chambers 6 and 7. Writing posture with 22mN / m and density of 0.8g / cc of ethanol-based ink i filled with 1/4 of the total capacity of the first and second ink tank chambers 6 and 7, and the pen core 15 horizontal. The result of writing is shown.
[0035]
<Example 2>
The rear wall is formed by a temporary ink reservoir portion formed of a cross-shaped comb-shaped molded body and an ink supply body formed of a sintered body of resin fine particles. In the first and second ink tank chambers 6 and 7, The result of writing ethanol ink having the same physical properties as above with 1/4 writing of the total capacity of the first and second ink tank chambers 6 and 7, with the pen core 15 in a horizontal writing posture. Is shown.
[0036]
<Example 3>
The rear wall is formed by a temporary ink storage portion made of a comb-shaped molded body and an ink supply body made of a sheet material, and the above-mentioned ones are provided in the first and second ink tank chambers 6 and 7. Shows the result of writing with the same physical properties of ethanol-based ink as 1/4 writing of the total capacity of the first and second ink tank chambers 6 and 7, with the pen core 15 in a horizontal writing posture. Yes.
[0037]
<Example 4>
A rear wall is formed by a temporary ink reservoir made of a sheet and an ink supply made of a fiber bundle, and the same physical properties as those described above in the first and second ink tank chambers 6 and 7 FIG. 6 shows the result of writing with a writing posture in which the pen core 15 is filled horizontally by filling a quarter of the total capacity of the first and second ink tank chambers 6 and 7.
[0038]
<Example 5>
The rear wall is formed by a temporary ink reservoir made of a sheet and an ink supply made of a sintered body of resin fine particles, and the above-mentioned ones are formed in the first and second ink tank chambers 6 and 7. Shows the result of writing with the same physical properties of ethanol-based ink as 1/4 writing of the total capacity of the first and second ink tank chambers 6 and 7, with the pen core 15 in a horizontal writing posture. Yes.
[0039]
<Example 6>
A rear wall is formed by a temporary ink reservoir made of a sheet and an ink supply made of a sheet, and the same physical properties as those described above in the first and second ink tank chambers 6 and 7. The result of writing with the ethanol-based ink was filled with 1/4 of the total capacity of the first and second ink tank chambers 6 and 7 and the pen core 15 was placed in a horizontal writing posture.
[0040]
<Example 7>
A rear wall is formed by a temporary ink storage section made of a fiber bundle and an ink supply body made of a fiber bundle, and the same physical properties as those described above in the first and second ink tank chambers 6 and 7 The ethanol ink is filled with ¼ of the total capacity of the first and second ink tank chambers 6 and 7 and the pen core 15 is placed in a horizontal posture.
[0041]
<Example 8>
The rear wall is formed by a temporary ink storage part made of a porous body of fiber bundles and an ink supply body made of resin fine particles, and in the first and second ink tank chambers 6 and 7, The result shows that the ethanol ink having the same physical properties is filled with 1/4 of the total capacity of the first and second ink tank chambers 6 and 7 and the pen core 15 is placed in a horizontal writing posture. .
[0042]
<Example 9>
The rear wall is formed by a temporary ink storage part composed of a porous body of fiber bundles and an ink supply body composed of a sheet material, and the above-mentioned ones are provided in the first and second ink tank chambers 6 and 7. Shows the result of writing with the same physical properties of ethanol-based ink as 1/4 writing of the total capacity of the first and second ink tank chambers 6 and 7, with the pen core 15 in a horizontal writing posture. Yes.
[0043]
<Example 10>
The rear wall is formed by a temporary ink storage part made of a porous body of a sintered body of resin fine particles and an ink supply body made of a fiber bundle, and in the first and second ink tank chambers 6 and 7, The result of writing ethanol ink having the same physical properties as above with 1/4 writing of the total capacity of the first and second ink tank chambers 6 and 7, with the pen core 15 in a horizontal writing posture. Is shown.
[0044]
<Example 11>
In the first and second ink tank chambers 6, 7, the rear wall is formed by a temporary ink reservoir portion made of a porous body of resin fine particle sintered body and an ink supply body made of a sintered body of resin fine particle. In addition, the ethanol-based ink having the same physical properties as described above is filled with 1/4 of the total capacity of the first and second ink tank chambers 6 and 7, and the pen core 15 is placed in a horizontal writing posture. Shows the results.
[0045]
<Example 12>
A bottom wall is formed by a temporary ink storage part made of a porous body of a sintered body of resin fine particles and an ink supply body made of a sheet material, and in the first and second ink tank chambers 6 and 7, The result of writing ethanol ink having the same physical properties as above with 1/4 writing of the total capacity of the first and second ink tank chambers 6 and 7, with the pen core 15 in a horizontal writing posture. Is shown.
[0046]
<Comparative Example 1>
A temporary ink storage section made of a shaped article having a comb-shaped cross section and no ink replenishment body, and an ethanol system having the same physical properties as those described above in the first and second ink tank chambers 6 and 7 The results are shown in which ink was filled with a quarter of the total capacity of the first and second ink tank chambers 6 and 7 and the pen core 15 was placed in a horizontal writing posture.
[0047]
<Comparative example 2>
The temporary ink reservoir is formed of a single sheet and is not provided with an ink replenishment body, and ethanol having the same physical properties as those described above is provided in the first and second ink tank chambers 6 and 7. This is the result of writing with the system ink filled with ¼ of the total capacity of the first and second ink tank chambers 6, 7 and with the pen core 15 in a horizontal writing posture.
[0048]
<Comparative Example 3>
The temporary ink reservoir is formed of a porous body made of a fiber bundle and is not provided with an ink replenishing body. The same physical properties as those described above are provided in the first and second ink tank chambers 6 and 7. The result of writing with the ethanol-based ink was filled with 1/4 of the total capacity of the first and second ink tank chambers 6 and 7 and the pen core 15 was placed in a horizontal writing posture.
[0049]
<Comparative example 4>
The temporary ink reservoir is a porous body made of resin fine particles, and is not provided with an ink replenishing body. In the first and second ink tank chambers 6 and 7, ethanol having the same physical properties as described above is used. The results are shown in which the system ink is filled by ¼ of the total capacity of the first and second ink tank chambers 6 and 7 and the pen core 15 is placed in a horizontal posture.
[0050]
  Next, a direct liquid writing instrument B according to a second embodiment of the present invention will be described with reference to FIG.
  The direct liquid writing instrument B has substantially the same configuration as the direct liquid writing instrument A according to the first embodiment. However, in the direct liquid writing instrument A, the rear wall 12 itself is formed by an ink supply body. In contrast to this, the rear wall 12 'is not formed of an ink supply body, and the rear wall 12' is separated from the rear wall 12 '. 'After the ink guide core 9 in the vicinityendIt is the thing of the structure fitted by the part.
  In addition, the same code | symbol is attached | subjected about the thing equivalent in what was demonstrated in the direct liquid type writing instrument A which concerns on 1st Embodiment, and those description is abbreviate | omitted.
[0051]
A direct liquid writing instrument C according to a third embodiment of the present invention will be described with reference to FIG.
The direct liquid writing instrument C has substantially the same configuration as that of the direct liquid writing instrument A according to the first embodiment, but the side wall 17 that defines the second ink tank chamber 7 'is formed as a front wall. The ink is formed in a length extending from 11 to the vicinity of the rear wall 12, and is a portion facing the rear ink reservoir 6 b ′ and in the vicinity of the partition wall 13, and is retained in the rear ink reservoir 6 b ′. Are formed with three ink inflow holes 17a, which are ink inflow ports for allowing the ink to flow into the second ink tank chamber 7. 5 shows only one of the three ink inflow holes 17a.
[0052]
The relationship between the ink inflow holes 17a and the notches 13a and 13a, which are ink circulation ports formed in the partition wall 13, is that the second ink is supplied from the rear ink reservoir 6b 'through the ink inflow holes 17a. The ink is formed so as to be retained in the ink reservoir 6b 'on the rear side until the ink has finished flowing into the tank chamber 6. Specifically, the cross-sectional areas of the ink inflow holes 17a are formed larger than the cross-sectional areas of the notches 13a and 13a.
In addition, the same code | symbol is attached | subjected about the thing equivalent in what was demonstrated in the direct liquid type writing instrument A which concerns on 1st Embodiment, and those description is abbreviate | omitted.
[0053]
FIG. 6 shows another example of the partition wall.
The partition wall 18 according to this other example forms a core fitting insertion hole 18a that coincides with the axis O and coincides with the outer diameter of the ink guide core 9, and has a substantially fan-shaped flat surface 4 centered on the axis O. A disk-shaped one in which two ink flow holes 18b are formed at intervals of 90 °, and this is made of, for example, a sheet, a fiber bundle, or a fine particle sintered body such as resin, metal, ceramics, etc. It is formed by an ink supply body formed into a disk shape.
[0054]
In the above description, an example in which the rear wall, the partition wall, and the like that close the rear end surface of the first ink tank chamber are formed by the ink supply body has been described. However, the present invention is not limited thereto, and the front end surface of the first ink tank chamber, for example, You may make it the structure which formed the front part wall closed with an ink supply body. That is, according to the present invention, when the ink in the ink tank portion is in a writing posture in which the ink does not contact the ink guide core, the ink is absorbed at the position where the ink contacts the ink in the ink tank portion and the absorbed ink is used as the ink guide core. It is sufficient that the ink supply body for supplying is provided.
[0055]
In the above description, the example in which the cylindrical first ink tank chamber and the second cylindrical ink tank chamber are arranged concentrically has been described. The ink tank chamber may be arranged eccentrically, and the planar shape of the side wall is not limited to a circle, and may be formed in a known shape such as an ellipse or a polygon.
[0056]
In the above description, the example in which the ink inlet is disposed at a position that equalizes the total volume of the volume of the first ink tank chamber and the volume of the second ink tank chamber has been described. The ink inlet is located at a position that approximately matches the ink level that satisfies the volume of approximately 20% to 90% of the total volume of the ink tank chamber and the volume of the second ink tank chamber. May be.
[0057]
In the above, the temporary ink storage part is formed by separating a so-called single-wafer type formed by stacking a plurality of substantially disc-shaped sheet bodies while holding a required gap separately from the ink guide core. Although an example has been described, for example, it may be formed of a fiber bundle, a porous body of a fine-particle sintered body such as resin, metal, or ceramic, a single-wafer body, or a molded body having a comb-shaped cross section.
In the above description, the example in which the temporary ink reservoir is formed separately from the ink guide core has been described. However, the ink guide core and the temporary ink reservoir may be formed integrally.
[0058]
In the above, an ink is provided in the first ink tank chamber to divide the front ink reservoir and the rear ink reservoir into two parts, and to distribute ink between the front and rear ink reservoirs on the partition wall. Although the example which formed the circulation port was demonstrated, it is not necessary to necessarily provide a partition wall.
[0059]
【The invention's effect】
  Claims 1 to6According to the described invention, the following effects can be obtained.
  The storage volume of the temporary ink storage unit can be set according to the volume of the second ink tank chamber, and even if the volume of the entire ink tank unit is increased, therefore, a relatively large amount of ink is also stored in the ink tank. Even when the ink is stored in the unit, it is not necessary to set the storage volume of the temporary ink storage unit large according to the ink amount of the entire ink tank unit.
In addition, a partition wall that bisects the front ink reservoir and the rear ink reservoir is provided in the first ink tank chamber, and ink is circulated between the front ink reservoir and the rear ink reservoir on the partition wall. As the ink circulation port is formed, the ink staying in the front ink reservoir is allowed to flow into the rear ink reservoir through the ink circulation port of the partition wall, and the ink staying in the rear ink reservoir is It becomes easy to flow into the second ink tank chamber from the ink inlet.
[0060]
When the writing posture is such that the ink does not contact the ink guide core, the ink absorbed by the ink supply body can be replenished to the ink guide core. Continuous writing can be performed well.
[0061]
By forming the ink inlet in the second ink tank chamber, the ink from the front wall to the ink inlet from the volume of the second ink tank chamber from the front wall to the ink inlet The ink storage volume of the temporary ink storage unit can be set in consideration of the ink amount excluding the volume of the induction core.
For this reason, while being able to set the ink storage volume of the temporary ink storage part further smaller, the ink staying in the rear ink reservoir can be supplied into the second ink tank chamber through the ink inlet, Ink can be satisfactorily supplied to the ink guide core, and ink can be prevented from blowing out when the front portion of the ink guide core is in an upward standing posture.
[0062]
  Claims 1 to6In addition to the above-described common effects obtained by the described invention, the following effects can be obtained according to the invention described in each claim.
  According to the second aspect of the present invention, since the rear wall for closing the rear end surface of the first ink tank chamber is formed by the ink replenishing body, it is not necessary to provide the ink replenishing body in the ink tank portion. The volume of the tank can be used effectively.
[0063]
  According to the invention of claim 3, the front end surface of the first ink tank chamber isAbove sectionSince the front wall is formed of the ink replenishing body, it is not necessary to provide the ink replenishing body in the ink tank portion as in the second aspect of the invention, and the volume of the ink tank portion can be effectively utilized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic structure of a direct liquid writing instrument according to a first embodiment of the present invention.
2A is a cross-sectional view taken along line II shown in FIG. 1, FIG. 2B is a cross-sectional view taken along line II-II, and FIG. 2C is a cross-sectional view taken along line III-III; .
FIG. 3 is a cross-sectional view showing a state in which the direct liquid writing instrument is in a horizontal writing posture.
FIG. 4 is a cross-sectional view showing a schematic structure of a direct liquid writing instrument according to a second embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a schematic structure of a direct liquid writing instrument according to a third embodiment of the present invention.
FIG. 6 is a plan view showing another example of a partition wall.
FIG. 7 is a cross-sectional view showing a schematic structure of a conventional direct liquid writing instrument.
[Explanation of symbols]
5 Temporary ink reservoir
6 First ink tank chamber
6a Front ink reservoir
6b Rear ink reservoir
7 Second ink tank chamber
7a Ink inlet
8 Ink tank section
9 Ink guide core
11 Front wall
12 Rear wall as ink supply
13 division wall
13a Ink distribution port
15 Pen core
i ink

Claims (6)

A temporary ink reservoir, a first ink tank chamber, and a second ink tank chamber front wall perpendicular to the axial direction provided with an ink inlet for introducing the ink that is stored in this, that It is defined by the ink inlet and the side wall parallel to the axial direction . These ink tank chambers are connected in front and back and in parallel . The temporary ink reservoir and these ink tank chambers are connected in front and rear. And
A partition wall that bisects the front ink reservoir and the rear ink reservoir is provided in the first ink tank chamber, and ink is placed between the front ink reservoir and the rear ink reservoir on the partition wall. Form an ink distribution port for distribution,
An ink guide core is disposed through the second ink tank chamber , the temporary ink reservoir, and the rear ink reservoir of the first ink tank chamber ;
When the ink in the ink tank is in a writing posture so as not to contact the ink guide core, the ink is absorbed into the position in contact with the ink in the ink tank and the absorbed ink is supplied to the ink guide core. An ink replenishing body for providing a direct liquid writing instrument.   2. The direct liquid writing instrument according to claim 1, wherein a rear wall for closing a rear end surface of the first ink tank chamber is formed of an ink supply body, and a rear end of the ink guide core is in close contact with the rear wall.   3. The direct ink-jet recording apparatus according to claim 1, wherein the ink guide core is inserted into the front wall defining the front end surface of the first ink tank chamber, and the front wall is formed of an ink supply body. Liquid writing instrument.   4. The direct liquid writing instrument according to claim 1, 2 or 3, wherein the ink supply body is formed of a sheet, a fiber bundle or a porous body.   The direct liquid writing instrument according to claim 1, 2, 3, or 4, wherein the temporary ink reservoir is formed separately from the ink guide core.   6. The direct liquid writing instrument according to claim 1, 2, 3, 4, or 5, wherein the temporary ink reservoir is formed of a porous body including a fiber bundle or the like, a sheet body, or a shaped article having a comb-shaped cross section.

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