JPH1178352A - Direct liquid type writing utensil - Google Patents
Direct liquid type writing utensilInfo
- Publication number
- JPH1178352A JPH1178352A JP9249937A JP24993797A JPH1178352A JP H1178352 A JPH1178352 A JP H1178352A JP 9249937 A JP9249937 A JP 9249937A JP 24993797 A JP24993797 A JP 24993797A JP H1178352 A JPH1178352 A JP H1178352A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- occluding body
- pen tip
- direct liquid
- writing instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Pens And Brushes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は直液式筆記具に関す
る。さらに詳細には、インキタンク内にインキを直に貯
留し、ペン先とインキタンクとの間に多孔質材料よりな
るインキ吸蔵体を配置した直液式筆記具に関する。尚、
本発明で、「前」とはペン先側を示し、「後」とはイン
キタンク側を示す。The present invention relates to a direct liquid writing instrument. More specifically, the present invention relates to a direct liquid writing instrument in which ink is directly stored in an ink tank and an ink occluding body made of a porous material is arranged between a pen tip and the ink tank. still,
In the present invention, “front” indicates the pen tip side, and “rear” indicates the ink tank side.
【０００２】[0002]
【従来の技術】従来この種の筆記具において、例えば、
実公昭５６−３３７３９号公報には、「軸筒の先端に
筆記体を止着し、該筆記体の後部と当接する毛管作用を
有するインキ吸蔵体を軸筒内面との間に外気と連通する
通気路が存し得るよう軸筒内に装着し、該インキ吸蔵体
の後端に圧縮部材を取り付けて、該取り付け部における
インキ吸蔵体の毛細間隙を密になし、このインキ吸蔵体
の後端部と軸筒後部内に設けられたインキタンクとを連
絡孔により連通せしめた筆記具」が開示されている。
（図６参照）2. Description of the Related Art Conventionally, in a writing instrument of this kind, for example,
Japanese Utility Model Publication No. 56-33739 discloses that a writing body is fixed to the tip of a barrel, and an ink occluding body having a capillary action, which comes into contact with the rear part of the barrel, communicates with the outside air between the inside of the barrel. The ink storage body is mounted in the shaft cylinder so that a ventilation path can be provided, and a compression member is attached to the rear end of the ink storage body to form a tight gap in the ink storage body at the mounting portion. A writing instrument "in which a portion and an ink tank provided in the rear portion of the barrel are connected by a communication hole."
(See Fig. 6)
【０００３】また、実開平２−４８３７７号には、
「インキタンクと先端筆記体間にインキ導出体を配設し
た筆記具に於いて、インキ導出体に当接してその外周に
配設したインキ調整用多孔質体の毛細管力を、インキ導
出体近傍部を強く、それより外方部を弱くした筆記具の
インキ調整用多孔質体」が開示されている。（図７参
照）[0003] In Japanese Utility Model Laid-Open No. 2-48377,
"In a writing implement with an ink outlet between the ink tank and the tip writing body, the capillary force of the ink adjusting porous body that is placed on the outer periphery of the ink outlet is brought into contact with the ink outlet. , And a porous body for ink adjustment of a writing instrument, in which the outer portion is weakened. (See Fig. 7)
【０００４】[0004]
【発明が解決しようとする課題】しかし、前記の筆記
具（図６参照）は、圧縮によりインキ吸蔵体Ｂの後端の
毛細間隙は密であるが、その他の大部分はストレート状
であり、毛細間隙の間隙幅（すなわち毛細管力）が略均
一である。そのため、ペン先を下向き状態で保管した場
合、インキ吸蔵体Ｂ内の保留インキＡのほとんどはイン
キ吸蔵体Ｂの下方（すなわちインキ吸蔵体Ｂ前部）に集
中しがちである。それにより、落下等の衝撃時やキャッ
プの取り外し時に、インキが外部に漏出するおそれがあ
った。However, in the above-mentioned writing instrument (see FIG. 6), the capillary gap at the rear end of the ink occlusion body B is dense due to compression, but most of the other parts are straight, and the capillary is small. The gap width (ie, capillary force) of the gap is substantially uniform. Therefore, when the pen tip is stored in a downward state, most of the retained ink A in the ink storage B tends to concentrate below the ink storage B (that is, in front of the ink storage B). As a result, at the time of impact such as dropping or removing the cap, the ink may leak to the outside.
【０００５】さらに、前記従来のの筆記具は、インキ
吸蔵体Ｂ前部にインキＡを集中させやすいため、温度変
化等によってインキタンクＣ内が減圧したとき、インキ
吸蔵体Ｂ前部のインキＡがインキタンクＣ内にスムーズ
に戻らず、インキ吸蔵体Ｂ前部にインキＡを残留させた
まま、インキタンクＣ内に空気を侵入させやすい。その
結果、インキタンクＣ内の空気の膨張・収縮が繰り返さ
れると、インキ吸蔵体Ｂ前部の残留インキＡが次第に増
加し、最後にはペン先側よりインキを漏出させてしまう
おそれがあった。Further, in the above-mentioned conventional writing instrument, since the ink A tends to concentrate on the front portion of the ink storage body B, when the pressure in the ink tank C is reduced due to a temperature change or the like, the ink A on the front side of the ink storage body B is discharged. It is not easy to return to the ink tank C, and it is easy for air to enter the ink tank C while the ink A remains at the front of the ink storage body B. As a result, when the expansion and contraction of the air in the ink tank C is repeated, the residual ink A in the front part of the ink occluding body B gradually increases, and finally there is a possibility that the ink may leak from the pen tip side. .
【０００６】その上、前記従来のの筆記具は、収容イ
ンキＡのほとんどをインキ吸蔵体Ｂ前部に分布させ、イ
ンキ吸蔵体Ｂ後部に空気を侵入させがちであることか
ら、インキ吸蔵体Ｂ外面と軸筒内面との間に、外気と連
通する通気路Ｄが必要である。もし、この通気路Ｄが存
在しないと、インキ吸蔵体Ｂ後部の空気が温度上昇等に
より膨張すると、インキが外部に押し出されるおそれが
ある。そのため、前記従来のの筆記具では、前記通気
路Ｄを設けることによって、インキ吸蔵体Ｂ後部に空気
を閉じ込めないようにしてインキ漏出を回避しようとし
ている。しかし、前記通気路Ｄを、軸筒内面とインキ吸
蔵体Ｂ外面との間に形成するには、製造上手間であり製
造コストを増加させるばかりか、合成樹脂成形体により
軸筒等の部材を構成する場合、通気路用の溝やリブをそ
の内面に形成すると、その外面にはヒケが発生し、外観
不良やキャップ装着時の気密不良を生じさせるおそれも
ある。In addition, in the above-mentioned conventional writing implement, most of the stored ink A is distributed to the front of the ink occluding body B, and air tends to enter the rear of the ink occluding body B. A ventilation path D that communicates with the outside air is required between the shaft cylinder inner surface. If the air passage D is not present, if the air behind the ink occluding body B expands due to a temperature rise or the like, the ink may be pushed out. Therefore, in the conventional writing implement, the air passage D is provided so as to prevent air from being trapped in the rear portion of the ink occluding body B so as to avoid ink leakage. However, in order to form the air passage D between the inner surface of the barrel and the outer surface of the ink occluding body B, not only is the production time and the production cost increased, but also the member such as the barrel is made of a synthetic resin molded body. In the case of forming, if grooves or ribs for the ventilation path are formed on the inner surface, sinks may occur on the outer surface, which may cause poor appearance and poor airtightness when the cap is attached.
【０００７】また、前記従来のの筆記具（図７参照）
は、インキ調節用多孔質体Ｂ（本願のインキ吸蔵体Ｂに
相当）の毛細管力を、径方向に変化させ、インキ導出体
Ｅ（本願のインキ誘導部材に相当）近傍部で強く、それ
より外方部で弱く設定したとしても、毛細管力は軸方向
に均一である。そのため、ペン先下向き状態で保管した
場合、前記の筆記具と同様、インキ調整用多孔質体Ｂ
の前部にインキＡを集中させ、落下等の衝撃時やキャッ
プの取り外し時、インキが外部に漏れ出すおそれがあっ
た。[0007] Further, the conventional writing implement (see FIG. 7).
Changes the capillary force of the ink adjusting porous body B (corresponding to the ink absorbing body B of the present application) in the radial direction, and is strong near the ink outlet E (corresponding to the ink guiding member of the present invention). Even if the outer portion is set weaker, the capillary force is uniform in the axial direction. Therefore, when stored in a state where the pen tip is facing downward, the porous body B for ink adjustment
When the ink A is concentrated on the front part, the ink may leak to the outside at the time of impact such as dropping or at the time of removing the cap.
【０００８】本発明は前記従来の問題点を解決するもの
であって、インキ漏出事故を回避すると共に、簡易な構
造で製造コストを抑えた直液式筆記具を提供しようとす
るものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a direct liquid writing instrument which avoids an ink leakage accident and has a simple structure and a reduced production cost.
【０００９】[0009]
（第１の発明）本発明は、ペン先２とインキタンク３と
の間に、多孔質材料よりなるインキ吸蔵体４を配置した
直液式筆記具１であって、前記インキ吸蔵体４に、その
前部から後部へ向かうに従い漸次毛細管力を強くしたイ
ンキ保留部５を設けたこと（請求項１）を要件とする。
（図１、図２、図３、図４、及び図５参照）(First Invention) The present invention is directed to a direct liquid writing instrument 1 in which an ink occluding body 4 made of a porous material is disposed between a pen tip 2 and an ink tank 3. It is required that an ink retaining section 5 is provided in which the capillary force gradually increases from the front to the rear (claim 1).
(See FIGS. 1, 2, 3, 4, and 5)
【００１０】前記直液式筆記具１（請求項１）は、イン
キ吸蔵体４の前部から後部へ向かうに従い漸次毛細管力
を強くしたインキ保留部５により、ペン先下向き状態で
インキタンク３の内圧が上昇したとしても、インキタン
ク３からのインキをインキ吸蔵体４の前部に集中させる
ことを防ぎ、その結果、落下等の衝撃時やキャップの取
り外し時のインキの外部への飛び散りや漏出を回避でき
る。The direct liquid writing implement 1 (Claim 1) is provided with an internal pressure of the ink tank 3 in a pen point downward state by an ink holding section 5 in which a capillary force is gradually strengthened from a front part to a rear part of the ink storage body 4. Even if the ink rises, the ink from the ink tank 3 is prevented from being concentrated on the front part of the ink occluding body 4, and as a result, the ink splatters or leaks to the outside at the time of an impact such as dropping or removing the cap. Can be avoided.
【００１１】・毛細管力Ｔ、ペン先水頭圧Ｇ また、前記請求項１の直液式筆記具１において、ペン先
下向き状態で、前記インキ保留部５内の任意の位置での
毛細管力Ｔを、ペン先２から前記任意の位置までの高さ
Ｈのペン先水頭圧Ｇより大きくすると共に、前記毛細管
力Ｔと前記ペン先水頭圧Ｇの差を、インキ保留部５前端
からインキ保留部５後端へ向かうに従い漸次大きくした
こと（請求項２）が好ましい。（図２参照）The capillary force T and the pen tip water head pressure G In the direct liquid writing instrument 1 of the first aspect, the capillary force T at an arbitrary position in the ink holding section 5 in a state where the pen tip is directed downward is defined as: The head pressure G at the height H from the pen tip 2 to the arbitrary position is made larger than the head pressure G, and the difference between the capillary force T and the head pressure G is calculated from the front end of the ink reservoir 5 to the rear of the ink reservoir 5. It is preferable that the width is gradually increased toward the end (claim 2). (See Fig. 2)
【００１２】それにより、前記直液式筆記具１（請求項
２）は、内圧上昇の際のインキタンク３内の溢出インキ
を、インキ吸蔵体４（即ちインキ保留部５）の後部から
その前方に渡って分布させることができ、従来のように
インキをインキ吸蔵体４前部に集中的に存在させ、イン
キ吸蔵体４の後部に空気を侵入させることがない。Accordingly, the direct liquid writing implement 1 (claim 2) transfers the overflowing ink in the ink tank 3 when the internal pressure rises from the rear of the ink storage body 4 (ie, the ink storing section 5) to the front. The ink can be distributed over the ink occluding body 4 in the conventional manner, and the air does not enter the rear of the ink occluding body 4 as in the related art.
【００１３】そのため、前記直液式筆記具１（請求項
２）は、温度変化等によってインキタンク３内が減圧し
たとき、インキ吸蔵体４（即ち、インキ保留部５）内の
インキが前方から順にインキタンク３内へ途切れること
なくスムーズにリターンバックする。その結果、前記イ
ンキ吸蔵体４前部にインキを残留させたまま、インキタ
ンク３内に空気を侵入させることがない。即ち、インキ
タンク３内で空気の膨張・収縮が繰り返されても、イン
キ吸蔵体４前部にインキを残留させないため、落下等の
衝撃時やキャップの取り外し時のインキの漏出事故を、
より一層、防止できる。Therefore, when the pressure inside the ink tank 3 is reduced due to a temperature change or the like, the ink in the ink occluding body 4 (ie, the ink storing section 5) is arranged in order from the front when the direct liquid type writing instrument 1 (Claim 2) is used. It returns smoothly to the ink tank 3 without interruption. As a result, air does not enter the ink tank 3 with the ink remaining at the front part of the ink storage body 4. That is, even if the expansion and contraction of air in the ink tank 3 is repeated, the ink does not remain at the front portion of the ink occluding body 4.
It can be further prevented.
【００１４】さらに、前記直液筆記具（請求項２）は、
インキ吸蔵体４後部に空気を閉じ込めることがないた
め、従来のように敢えて通気路を設けなくても、インキ
漏出を回避できる。そのため、筆記具自体がシンプルな
構造となり、製造コストを抑え、安価に提供できる。そ
の上、合成樹脂成形体により軸筒７等の部材を構成する
場合、ヒケによる外観不良やキャップ装着時の気密不良
を生じさせるおそれがない。Furthermore, the direct liquid writing instrument (Claim 2)
Since air is not trapped in the rear part of the ink occluding body 4, ink leakage can be avoided without intentionally providing a ventilation path as in the related art. For this reason, the writing implement itself has a simple structure, so that the manufacturing cost can be reduced and the writing implement can be provided at low cost. In addition, when the member such as the shaft cylinder 7 is formed of a synthetic resin molded body, there is no risk of causing poor appearance due to sink marks and poor airtightness when the cap is attached.
【００１５】尚、ペン先下向き状態において、前記ペン
先水頭圧Ｇは、ペン先２からインキ保留部５の任意位置
までの高さＨにより変化し、即ち、Ｇ＝（インキ密度
ρ）×（重力加速度ｇ）×（高さＨ）で表され、ペン先
方向（下方向）に作用する。また、前記インキ吸蔵体４
のインキ保留部５内の毛細管力Ｔは、多孔質材料の空隙
の大きさ（即ち多孔質材料の密度）により設定され、イ
ンキタンク方向（上方向）に作用する。In the pen tip downward state, the pen tip water head pressure G changes with the height H from the pen tip 2 to an arbitrary position of the ink holding part 5, that is, G = (ink density ρ) × ( It is represented by gravitational acceleration g) × (height H) and acts in the direction of the pen tip (downward). Further, the ink occlusion body 4
Is set by the size of the voids of the porous material (that is, the density of the porous material), and acts in the ink tank direction (upward).
【００１６】仮に、本発明とは逆に、前記毛細管力Ｔが
前記ペン先水頭圧Ｇよりも小さい場合（即ち、Ｔ＜Ｇの
場合）、ペン先下向き状態のとき、従来のようにインキ
吸蔵体４後部よりもインキ吸蔵体４前部に優先してイン
キが保留されるおそれがある。さらに、前記毛細管力Ｔ
と前記ペン先水頭圧Ｇの差（Ｔ−Ｇ）を、インキ吸蔵体
４前部からインキ吸蔵体４後部へ向かうに従い漸次小さ
くした場合も、ペン先下向き状態のとき、従来のように
インキ吸蔵体４後部よりもインキ吸蔵体４前部に優先し
てインキが保留されるおそれがある。Contrary to the present invention, when the capillary force T is smaller than the pen tip head pressure G (that is, when T <G), when the pen tip is in the downward state, the ink is absorbed as in the prior art. There is a possibility that the ink may be retained more preferentially in the front part of the ink storage body 4 than in the rear part of the body 4. Further, the capillary force T
The difference (TG) between the head pressure G and the pen tip water head pressure G is gradually reduced from the front of the ink storage body 4 toward the rear of the ink storage body 4. There is a possibility that the ink may be retained more preferentially in the front part of the ink storage body 4 than in the rear part of the body 4.
【００１７】・液密部 また、前記請求項１又は２の直液式筆記具１において、
前記インキ保留部５の後端に、インキ保留部５より毛細
管力の強い、軸方向の適宜長さを有する液密部６を設け
てなること（請求項３）が好ましい。（図１及び図２参
照）Liquid-tight part In the direct liquid writing instrument 1 according to claim 1 or 2,
It is preferable that a liquid-tight portion 6 having an appropriate length in the axial direction, which has a stronger capillary force than the ink holding portion 5, is provided at the rear end of the ink holding portion 5 (claim 3). (See FIGS. 1 and 2)
【００１８】前記直液式筆記具１（請求項３）におい
て、前記液密部６は、常に保留インキによって液シール
されている。前記液シールにより、インキタンク３の減
圧時、インキ保留部５からインキタンク３へインキが戻
されるとき、インキ吸蔵体４内の全てのインキがインキ
タンク３に戻される以前に、空気がインキタンク３に取
り込まれることが阻止される。従って、インキタンク３
の減圧時、インキ保留部５内のインキを空気に優先して
インキタンク３に戻すことができ、即ち、インキ保留部
５にインキを残留させたまま空気交替させないため、イ
ンキ保留部５にインキを残留させず、インキ吸蔵体４前
部よりインキを漏出させるおそれがない。In the direct liquid writing implement 1 (claim 3), the liquid-tight portion 6 is always liquid-sealed with a holding ink. Due to the liquid seal, when the ink is returned from the ink storage unit 5 to the ink tank 3 when the ink tank 3 is depressurized, air is removed from the ink tank 3 before all the ink in the ink storage body 4 is returned to the ink tank 3. 3 is prevented. Therefore, the ink tank 3
When the pressure is reduced, the ink in the ink storage unit 5 can be returned to the ink tank 3 in preference to the air. That is, since the air is not replaced while the ink remains in the ink storage unit 5, the ink is stored in the ink storage unit 5. Does not remain, and there is no possibility that the ink leaks from the front portion of the ink occluding body 4.
【００１９】また、前記液密部６は、軸方向に適宜長さ
を有しているため、液シール性能を確実なものにしてい
る。前記液密部６の位置は、インキ吸蔵体４の後端部が
好ましく、それにより、前記液密部６の前方に形成され
るインキ保留部５のインキ保留容量をインキ吸蔵体４か
ら最大限に無駄なく得ることができる。Since the liquid-tight portion 6 has an appropriate length in the axial direction, the liquid sealing performance is ensured. The position of the liquid-tight part 6 is preferably the rear end of the ink-absorbing body 4, so that the ink-retaining capacity of the ink-retaining part 5 formed in front of the liquid-tight part 6 is maximized from the ink-absorbing body 4. Can be obtained without waste.
【００２０】・圧縮 また、前記請求項１乃至３の直液式筆記具１において、
前記インキ吸蔵体４の外面又は内面を径方向に圧縮し、
毛細間隙の間隙幅を変化させることによって毛細管力を
所定の強さに設定してなること（請求項４）が好まし
い。（図１、図２、及び図３参照）Compression In addition, in the direct liquid writing implement 1 according to any one of claims 1 to 3,
Compressing the outer or inner surface of the ink occluding body 4 in the radial direction,
It is preferable that the capillary force is set to a predetermined strength by changing the gap width of the capillary gap (claim 4). (See FIGS. 1, 2 and 3)
【００２１】前記請求項４の場合、前記インキ吸蔵体４
は、圧縮する前は、予め均一な間隙幅の毛細間隙分布を
有していることが好ましく、それにより、圧縮後、所望
する毛細間隙の分布（即ち毛細管力の分布）を確実に得
ることができる。In the case of the fourth aspect, the ink storage body 4
Before compression, it is preferable to have a capillary gap distribution having a uniform gap width in advance, so that after compression, a desired capillary gap distribution (ie, a distribution of capillary forces) can be reliably obtained. it can.
【００２２】また、前記インキ吸蔵体４を圧縮する方法
としては、例えば、軸筒７に取り付ける際に、軸筒７内
にインキ吸蔵体４を圧入させることによって圧縮する方
法、或いは、インキ吸蔵体４を予め圧縮してあるユニッ
トを軸筒７に取り付ける方法等、適宜である。As a method of compressing the ink occluding body 4, for example, a method of compressing the ink occluding body 4 by press-fitting the ink occluding body 4 into the shaft cylinder 7 when attaching the ink occluding body 4, or a method of compressing the ink occluding body 4 A method in which a unit in which 4 is compressed in advance is attached to the shaft cylinder 7 is appropriate.
【００２３】また、請求項１の構成（インキ吸蔵体４
に、その前部から後部に向かうに従い次第に強くしたイ
ンキ保留部５を設ける構成）にするために、或いは、請
求項２の構成（ペン先下向き状態で、前記インキ保留部
５内の任意の位置での毛細管力Ｔを、ペン先２から前記
任意の位置までの高さＨのペン先水頭圧Ｇより大きくす
ると共に、前記毛細管力Ｔと前記ペン先水頭圧Ｇの差
を、インキ保留部５前端からインキ保留部５後端へ向か
うに従い漸次大きくする構成）にするために、インキ吸
蔵体４の径方向の外面又は内面をテーパ状に圧縮し、軸
方向に毛細間隙の間隙幅（即ち毛細管力の強さ）を変化
させることが好ましい。Further, the constitution of claim 1 (the ink absorbing member 4)
3. An arrangement in which the ink holding section 5 is provided with a strength that is gradually increased from the front to the rear of the ink holding section 5 or an arbitrary position in the ink holding section 5 with the pen point downward. Is higher than the pen head pressure G at a height H from the pen tip 2 to the arbitrary position, and the difference between the capillary force T and the pen head pressure G is calculated by the ink holding unit 5. In order to gradually increase the size from the front end toward the rear end of the ink storing portion 5, the outer or inner surface in the radial direction of the ink occluding body 4 is compressed in a tapered shape, and the gap width of the capillary gap in the axial direction (ie, the capillary tube) It is preferable to change the strength of the force.
【００２４】前記テーパ状の圧縮により、インキ吸蔵体
４の毛細間隙の間隙幅を、インキ吸蔵体４の前部から後
部へ向かうに従い連続的に小さくし、即ち、インキ吸蔵
体４の毛細管力を、インキ吸蔵体４の前部から後部へ向
かうに従い連続的に強くし、請求項１又は２のような毛
細管力の設定を容易且つ確実に行うことができ、製造上
有利である。尚、前記テーパ状とは、微細な階段状に拡
径（又は縮径）変化させる、略連続的な変化も含むもの
とする。By the tapered compression, the width of the capillary gap of the ink occluding member 4 is continuously reduced from the front to the rear of the ink occluding member 4, that is, the capillary force of the ink occluding member 4 is reduced. The strength is continuously increased from the front part to the rear part of the ink occluding body 4, so that the capillary force can be easily and reliably set as described in claim 1 or 2, which is advantageous in manufacturing. Note that the tapered shape includes a substantially continuous change in which the diameter is increased (or reduced) in a fine stepwise manner.
【００２５】前記インキ吸蔵体４をテーパ状に圧縮する
箇所は、インキ吸蔵体４外面又は内面のいずれであって
もよく、インキ吸蔵体４の外面を圧縮するタイプは、例
えば、前記インキ吸蔵体４の外径を前部から後部に向か
うに従い小径にしてなる構成（図１）が挙げられ、一
方、インキ吸蔵体４の内面を圧縮するタイプは、例え
ば、前記インキ吸蔵体４の中心孔４１の内径を前部から
後部に向かうに従い大径にしてなる構成（図３）が挙げ
られる。また、この他にも、前記インキ吸蔵体４をテー
パ状に圧縮する箇所は、インキ吸蔵体４の内面及び外面
の両面でもよい。The place where the ink occluding body 4 is compressed into a tapered shape may be either the outer surface or the inner surface of the ink occluding body 4. A configuration in which the outer diameter of the ink occlusion body 4 is gradually reduced from the front to the rear (FIG. 1), while a type in which the inner surface of the ink occlusion body 4 is compressed is, for example, a center hole 41 of the ink occlusion body 4. (FIG. 3) in which the inner diameter of the front end increases from the front to the rear. In addition, the location where the ink occlusion body 4 is compressed in a tapered shape may be on both inner and outer surfaces of the ink occlusion body 4.
【００２６】また、前記液密部６（液シール部）は、イ
ンキ吸蔵体４の後部の外面又は内面を、ストレート状の
圧縮によって形成することが好ましい。それにより、軸
方向の適宜長さの液密部６を、容易且つ確実に構成する
ことができ、前記テーパ状に圧縮する場合と同様、製造
上有利となる（図１及び図２参照）。尚、この他にも、
前記液密部６は、インキタンク３とインキ吸蔵体４の間
の隔壁７１に設けたスリット７３により構成することも
できる。The liquid-tight portion 6 (liquid seal portion) is preferably formed by compressing the outer surface or the inner surface of the rear portion of the ink occluding body 4 into a straight shape. Accordingly, the liquid-tight portion 6 having an appropriate length in the axial direction can be easily and reliably formed, which is advantageous in manufacturing as in the case of the above-described tapered compression (see FIGS. 1 and 2). In addition, besides this,
The liquid-tight portion 6 may be constituted by a slit 73 provided in a partition 71 between the ink tank 3 and the ink occluding body 4.
【００２７】・インキ誘導部材 また、前記請求項１乃至４の直液式筆記具１において、
前記インキ吸蔵体４内に、そのインキ吸蔵体４の毛細管
力よりも強い毛細管力（即ち液密部６より強い毛細管
力）を有するインキ誘導部材９を配設させ、前記インキ
タンク３と前記ペン先２との間を連通してなること（請
求項５）が好ましい。Ink guide member In the direct liquid writing implement 1 according to any one of claims 1 to 4,
An ink guide member 9 having a capillary force stronger than the capillary force of the ink absorber 4 (that is, a capillary force stronger than the liquid-tight portion 6) is provided in the ink absorber 4, and the ink tank 3 and the pen are provided. It is preferable that the communication with the point 2 is established (claim 5).
【００２８】それにより、前記直液式筆記具（請求項
５）は、インキタンク３内のインキが、前記インキ誘導
部材９を介してペン先２へ常時供給され、筆跡途切れの
ない潤沢なインキ出が得られる。In this way, the direct liquid writing implement (Claim 5) allows the ink in the ink tank 3 to be constantly supplied to the pen tip 2 via the ink guide member 9 so that the handwriting can be supplied without interruption. Is obtained.
【００２９】また、前記インキ誘導部材９は、インキ吸
蔵体４（インキ保留部５及び液密部６）内面にその外周
面を直に接触させ、インキ吸蔵体４とのインキのやり取
りを直接、行う構成が好ましい。それにより、筆記時、
インキ吸蔵体４内の残留インキをインキタンク３へ戻さ
ずに直接、ペン先２へ供給させることができ、インキ吸
蔵体４内のインキをペン先２から迅速且つ確実に消費さ
せることができ、インキ吸蔵体４内のインキの残留防止
に効果的である。The ink guide member 9 makes the inner surface of the ink storage member 4 (the ink storing portion 5 and the liquid-tight portion 6) come into direct contact with the outer surface of the ink storage member 4 to directly exchange ink with the ink storage member 4. The configuration for performing the above is preferable. Therefore, when writing,
The ink remaining in the ink occluding body 4 can be directly supplied to the pen tip 2 without returning to the ink tank 3, and the ink in the ink occluding body 4 can be quickly and reliably consumed from the pen tip 2. This is effective for preventing ink from remaining in the ink occluding body 4.
【００３０】前記インキ誘導部材９の毛細管力を、イン
キ吸蔵体４（インキ保留部５及び液密部６）の毛細管力
よりも強くしたことにより、インキタンク３内のインキ
はインキ吸蔵体４より優先してインキ誘導部材９に供給
され、常にペン先２へインキ供給状態となる。By making the capillary force of the ink guide member 9 stronger than the capillary force of the ink occluding member 4 (the ink retaining portion 5 and the liquid-tight portion 6), the ink in the ink tank 3 is made to shine by the ink occluding member 4. The ink is supplied to the ink guiding member 9 preferentially, and the ink is always supplied to the pen tip 2.
【００３１】また、インキ誘導部材９の後端部を、イン
キ吸蔵体４の後端部からインキタンク３内へ露出又は突
出させることが好ましい。これにより、インキタンク３
からペン先２へのインキ供給を円滑にする。It is preferable that the rear end of the ink guide member 9 is exposed or protrudes into the ink tank 3 from the rear end of the ink storage body 4. Thereby, the ink tank 3
To the pen tip 2 from the printer.
【００３２】前記インキ誘導部材９の材質は、繊維束の
樹脂又は熱融着加工体、軸方向のインキ導出路を有する
合成樹脂の押出又は射出成形体、等適宜である。The material of the ink guiding member 9 is appropriately selected from the group consisting of a resin of a fiber bundle or a heat-sealed body, and an extruded or injection-molded body of a synthetic resin having an ink outlet in the axial direction.
【００３３】（第２の発明）また、本発明は、ペン先２
とインキタンク３との間に、多孔質材料よりなるインキ
吸蔵体４を配置した直液式筆記具１であって、前記イン
キ吸蔵体４の外面を、その前部から後部に向かうに従い
漸次小径となるよう圧縮し、前記インキ吸蔵体４の毛細
間隙の間隙幅を、その前部から後部へ向かうに従い漸次
小さくしたインキ保留部５を設けたこと（請求項６）を
要件とする。（図１及び図２参照）(Second Invention) The present invention relates to a pen tip 2
A direct liquid writing implement 1 in which an ink occluding body 4 made of a porous material is arranged between the ink occluding body 3 and the ink tank 3. The outer surface of the ink occluding body 4 is gradually reduced in diameter from the front to the rear. It is necessary to provide an ink retaining section 5 which is compressed so as to make the gap width of the capillary gap of the ink occluding body 4 gradually smaller from the front to the rear (claim 6). (See FIGS. 1 and 2)
【００３４】それにより、前記直液式筆記具１（請求項
６）は、インキ保留部５の毛細管力が後方に行くに従い
強く設定されるため、ペン先下向き状態でインキタンク
３の内圧が上昇したとしても、インキタンク３からのイ
ンキを、インキ吸蔵体４の前部に集中させず、その結
果、落下等の衝撃時やキャップの取り外し時のインキの
外部への飛び散りや漏出を回避できる。その上、インキ
吸蔵体４外面を圧縮させることにより、毛細管力の強さ
を変化させることから、製造が容易となり、安価な直液
式筆記具１を提供できる。また、前記直液式筆記具１
（請求項６）に、請求項３に記載の液密部６を設けるこ
とが好ましい。Accordingly, in the direct liquid type writing instrument 1 (claim 6), since the capillary force of the ink holding section 5 is set to be stronger as it goes backward, the internal pressure of the ink tank 3 rises with the pen point downward. However, the ink from the ink tank 3 is not concentrated on the front portion of the ink occluding body 4, and as a result, the ink can be prevented from splashing or leaking to the outside at the time of an impact such as a drop or when the cap is removed. In addition, since the strength of the capillary force is changed by compressing the outer surface of the ink occluding body 4, the manufacturing becomes easy and the inexpensive direct liquid writing instrument 1 can be provided. Further, the direct liquid writing implement 1
(Claim 6) is preferably provided with the liquid-tight portion 6 according to claim 3.
【００３５】（第３の発明）また、本発明は、ペン先２
とインキタンク３との間に、多孔質材料よりなるインキ
吸蔵体４を配置した直液式筆記具１であって、前記イン
キ吸蔵体４外面に、その前部から後部に向かうに従い漸
次小径となるテーパ状圧縮部５を設けると共に、前記テ
ーパ状圧縮部５の後端に該テーパ状圧縮部５より小径の
ストレート状圧縮部６を設けたこと（請求項７）を要件
とする。（図１及び図２参照）(Third Invention) The present invention also relates to a pen tip 2
A direct liquid writing instrument 1 in which an ink occluding body 4 made of a porous material is disposed between the ink occluding body 3 and the ink tank 3. The diameter of the ink occluding body 4 gradually decreases from the front to the rear. The tapered compression section 5 is provided, and a straight compression section 6 having a smaller diameter than the tapered compression section 5 is provided at the rear end of the tapered compression section 5 (claim 7). (See FIGS. 1 and 2)
【００３６】前記テーパ状圧縮部５によって、多孔質材
料よりなるインキ吸蔵体４の密度が、その前部から後部
に向かうに従って連続的に増加でき、毛細管力をインキ
吸蔵体４の前部から後部に向かうに従って連続的に強く
することができる。それにより、前記テーパ状圧縮部５
にはその後端部よりインキが入り、インキ吸蔵体４（テ
ーパ状圧縮部５）の前部にインキを集中させないため、
落下等の衝撃時やキャップの取り外し時のインキの外部
への飛び散りや漏出を回避できる。その上、前記テーパ
状の圧縮により、毛細管力の設定を容易且つ確実に行う
ことができ、製造上有利である。The density of the ink occluding material 4 made of a porous material can be continuously increased from the front portion to the rear portion by the tapered compression portion 5, and the capillary force is increased from the front to the rear portion of the ink occluding material 4. It can be strengthened continuously toward. Thereby, the tapered compression part 5
In order to prevent the ink from being concentrated at the front end of the ink occluding body 4 (tapered compression section 5),
It is possible to prevent the ink from scattering or leaking to the outside at the time of impact such as dropping or removing the cap. In addition, the tapered compression enables easy and reliable setting of the capillary force, which is advantageous in manufacturing.
【００３７】また、前記ストレート状圧縮部６は、常に
インキによって液シールされている。前記液シールによ
り、インキタンク３の減圧時、テーパ状圧縮部５からイ
ンキタンク３へインキが戻されるとき、テーパ状圧縮部
５内の全てのインキがインキタンク３へ戻される以前
に、空気がインキタンク３に取り込まれることが阻止さ
れる。従って、インキタンク３の減圧時、テーパ状圧縮
部５内のインキを空気に優先してインキタンク３に戻す
ことができ、即ち、テーパ状圧縮部５にインキを残留さ
せたまま空気交替させず、テーパ状圧縮部５にインキを
残留させないため、インキ吸蔵体４前部よりインキを漏
出させるおそれがない。The straight compression section 6 is always liquid-sealed with ink. Due to the liquid seal, when ink is returned from the tapered compression section 5 to the ink tank 3 when the ink tank 3 is depressurized, air is released before all the ink in the tapered compression section 5 is returned to the ink tank 3. It is prevented from being taken into the ink tank 3. Therefore, when the pressure in the ink tank 3 is reduced, the ink in the tapered compression section 5 can be returned to the ink tank 3 in preference to air, that is, the air is not replaced while the ink remains in the tapered compression section 5. Since the ink does not remain in the tapered compression part 5, there is no possibility that the ink leaks from the front part of the ink storage body 4.
【００３８】（第４の発明）また、本発明は、ペン先２
とインキタンク３との間に、多孔質材料よりなるインキ
吸蔵体４を配置した直液式筆記具１であって、前記イン
キ吸蔵体４の内面を、その前部から後部に向かうに従い
漸次大径となるよう圧縮し、前記インキ吸蔵体４の毛細
間隙の間隙幅を、その前部から後部へ向かうに従い漸次
小さくさせたインキ保留部５を設けたこと（請求項８）
を要件とする。（図３参照）(Fourth Invention) Further, the present invention relates to a pen tip 2
A direct liquid writing implement 1 in which an ink occluding body 4 made of a porous material is arranged between the ink occluding body 3 and the ink tank 3, wherein the inner surface of the ink occluding body 4 gradually increases in diameter from the front to the rear. The ink reservoir 5 is provided so as to be compressed so that the width of the capillary of the ink occluding body 4 is gradually reduced from the front to the rear.
Is required. (See Fig. 3)
【００３９】それにより、前記直液式筆記具１（請求項
８）は、インキ保留部５の毛細管力が後方に行くに従い
強く設定されるため、ペン先下向き状態でインキタンク
３の内圧が上昇したとしても、インキタンク３からのイ
ンキを、インキ吸蔵体４の前部に集中させず、その結
果、落下等の衝撃時やキャップの取り外し時のインキの
外部への飛び散りや漏出を回避できる。その上、インキ
吸蔵体４内面を圧縮させることにより、毛細管力の強さ
を変化させることから、製造が容易となり、安価な直液
式筆記具１を提供できる。また、前記直液式筆記具１
（請求項８）に、請求項３の液密部６を設けることが好
ましい。Thus, in the direct liquid type writing instrument 1 (claim 8), the capillary pressure of the ink holding section 5 is set to be stronger as it goes backward, so that the internal pressure of the ink tank 3 rises with the pen point downward. However, the ink from the ink tank 3 is not concentrated on the front portion of the ink occluding body 4, and as a result, the ink can be prevented from splashing or leaking to the outside at the time of an impact such as a drop or when the cap is removed. In addition, since the strength of the capillary force is changed by compressing the inner surface of the ink occluding body 4, the manufacturing becomes easy and the inexpensive direct liquid writing instrument 1 can be provided. Further, the direct liquid writing implement 1
(Claim 8) is preferably provided with the liquid-tight portion 6 of claim 3.
【００４０】（第５の発明）また、本発明は、ペン先２
とインキタンク３との間に、多孔質材料よりなるインキ
吸蔵体４を配置した直液式筆記具１であって、前記イン
キ吸蔵体４の内面に、その前部から後部に向かうに従い
漸次大径となるテーパ状圧縮部５を設けると共に、前記
テーパ状圧縮部５の後端に該テーパ状圧縮部より大径の
ストレート状圧縮部６を設けたこと（請求項９）を要件
とする。(Fifth Invention) The present invention also provides a pen tip 2
A direct liquid writing implement 1 in which an ink occluding body 4 made of a porous material is disposed between the ink occluding body 3 and the ink tank 3. The diameter of the ink occluding body 4 gradually increases from the front to the rear. And a straight compression portion 6 having a larger diameter than the tapered compression portion is provided at the rear end of the tapered compression portion 5 (claim 9).
【００４１】それにより、前記直液式筆記具１（請求項
９）は、前記テーパ状圧縮部５によって、多孔質材料よ
りなるインキ吸蔵体４の密度が、その前部から後部に向
かうに従って連続的に増加でき、毛細管力をインキ吸蔵
体４の前部から後部に向かうに従って連続的に強くする
ことができる。それにより、前記テーパ状圧縮部５には
その後端部よりインキが入り、インキ吸蔵体４（テーパ
状圧縮部５）の前部にインキを集中させないため、落下
等の衝撃時やキャップの取り外し時のインキの外部への
飛び散りや漏出を回避できる。その上、前記テーパ状の
圧縮により、毛細管力の設定を容易且つ確実に行うこと
ができ、製造上有利である。Accordingly, in the direct liquid writing instrument 1 (claim 9), the density of the ink occluding body 4 made of a porous material is continuously increased by the tapered compression section 5 from the front to the rear. And the capillary force can be continuously increased from the front to the rear of the ink storage body 4. As a result, the ink enters the tapered compression section 5 from the rear end thereof, and the ink is not concentrated on the front of the ink occluding body 4 (tapered compression section 5). Can be prevented from scattering or leaking out of the ink. In addition, the tapered compression enables easy and reliable setting of the capillary force, which is advantageous in manufacturing.
【００４２】また、前記ストレート状圧縮部６は、常に
インキによって液シールされている。前記液シールによ
り、インキタンク３の減圧時、テーパ状圧縮部５からイ
ンキタンク３へインキが戻されるとき、テーパ状圧縮部
５内の全てのインキがインキタンク３へ戻される以前
に、空気がインキタンク３に取り込まれることが阻止さ
れる。従って、インキタンク３の減圧時、テーパ状圧縮
部５内のインキを空気に優先してインキタンク３に戻す
ことができ、即ち、テーパ状圧縮部５にインキを残留さ
せたまま空気交替させず、テーパ状圧縮部５にインキを
残留させないため、インキ吸蔵体４前部よりインキを漏
出させるおそれがない。The straight compression section 6 is always liquid-sealed with ink. Due to the liquid seal, when ink is returned from the tapered compression section 5 to the ink tank 3 when the ink tank 3 is depressurized, air is released before all the ink in the tapered compression section 5 is returned to the ink tank 3. It is prevented from being taken into the ink tank 3. Therefore, when the pressure in the ink tank 3 is reduced, the ink in the tapered compression section 5 can be returned to the ink tank 3 in preference to air, that is, the air is not replaced while the ink remains in the tapered compression section 5. Since the ink does not remain in the tapered compression part 5, there is no possibility that the ink leaks from the front part of the ink storage body 4.
【００４３】・インキ吸蔵体 尚、本発明（請求項１〜請求項９）のインキ吸蔵体４
は、多孔質材料であり、具体的には、繊維束の熱融着加
工体、繊維束の樹脂加工体、フェルトの樹脂加工体、フ
ェルトの熱融着加工体、フェルトのニードルパンチ加工
体、合成樹脂製連続気泡体等が例示できる。Ink occluding body The ink occluding body 4 of the present invention (claims 1 to 9)
Is a porous material, specifically, a heat-fused body of a fiber bundle, a resin processed body of a fiber bundle, a resin processed body of felt, a heat-fused body of felt, a needle punched body of felt, Examples thereof include open cells made of synthetic resin.
【００４４】・ペン先 また、本発明（請求項１〜請求項９）のペン先２は、イ
ンキ誘導部材９から供給されたインキを吐出可能なもの
であればいずれであってもよく、例えば、繊維束の樹脂
又は熱融着加工体、フエルト加工体、合成樹脂製連続気
泡体、合成樹脂製押出成形体、ボールペンチップ、万年
筆型板状ペン体、小管状ペン体等、挙げられる。また、
ペン先２とインキ誘導部材９とを一部材で構成し、イン
キ誘導部材９がペン先２を兼ねる構成であってもよい。Pen tip The pen tip 2 of the present invention (claims 1 to 9) may be any as long as the ink supplied from the ink guide member 9 can be discharged. , Fiber bundle resin or heat fusion processed body, felt processed body, synthetic resin open cell, synthetic resin extruded body, ballpoint pen tip, fountain pen type plate pen, small tubular pen, and the like. Also,
The pen tip 2 and the ink guide member 9 may be configured as a single member, and the ink guide member 9 may be configured to also serve as the pen tip 2.
【００４５】・インキタンク また、本発明（請求項１〜請求項８）のインキタンク３
は、軸筒７内に直接、形成する構成（図１〜図５参
照）、別体のインキカートリッジをインキ吸蔵体４後端
に接続する構成（図７参照）、或いはインキタンク３の
後端開口部よりインキを補充可能とした構成等、適宜で
ある。Ink tank Ink tank 3 of the present invention (claims 1 to 8)
May be formed directly in the barrel 7 (see FIGS. 1 to 5), a separate ink cartridge may be connected to the rear end of the ink storage body 4 (see FIG. 7), or the rear end of the ink tank 3. A configuration in which ink can be replenished from the opening or the like is appropriate.
【００４６】[0046]
【発明の実施の形態】本発明の実施の形態を図面に従っ
て説明する。Embodiments of the present invention will be described with reference to the drawings.
【００４７】（第１実施例）図１及び図２に本発明・直
液式筆記具１の第１実施例を示す。図１はインキ未収容
の状態を示し、図２はインキを保留させたペン先下向き
状態を示す。(First Embodiment) FIGS. 1 and 2 show a first embodiment of a direct liquid writing instrument 1 according to the present invention. FIG. 1 shows a state in which ink is not stored, and FIG. 2 shows a state in which a pen tip is downward with ink retained.
【００４８】直液式筆記具１は、主に、前部に吸蔵体収
容部８を備えると共に後部にインキタンク３を備える軸
筒７と、前記吸蔵体収容部８に収容させたインキ吸蔵体
４と、前記インキ吸蔵体４内に軸方向に貫装された、ペ
ン先２を兼ねるインキ誘導部材９とからなる。The direct liquid type writing instrument 1 mainly comprises a shaft cylinder 7 having an occlusion body accommodating portion 8 at a front portion and an ink tank 3 at a rear portion, and an ink occlusion member 4 accommodated in the occlusion body accommodating portion 8. And an ink guide member 9 which also penetrates into the ink occluding body 4 in the axial direction and also serves as the pen tip 2.
【００４９】前記軸筒７は、円筒状の合成樹脂（例え
ば、ポリエチレン、ポリプロピレン等）の射出成形体で
あり、その前部に、後方に向かうに従って小径となる縮
径テーパ状内面を備えた吸蔵体収容部８が設けられ、前
記吸蔵体収容部８の後方には、隔壁７１を介して、イン
キを直に貯液する空間部であるインキタンク３が設けら
れる。前記軸筒７のインキタンク３の後端開口部には、
尾栓７４が固着されている。The shaft cylinder 7 is an injection-molded body made of a cylindrical synthetic resin (eg, polyethylene, polypropylene, etc.), and has an occluder having a tapered inner surface having a diameter decreasing toward the rear at the front. A body housing portion 8 is provided, and an ink tank 3 which is a space portion for directly storing ink is provided behind the occlusion body housing portion 8 via a partition wall 71. At the rear end opening of the ink tank 3 of the barrel 7,
A tail plug 74 is fixed.
【００５０】前記吸蔵体収容部８内には、合成樹脂製繊
維束（例えばポリエステル樹脂製繊維束）の熱融着加工
体からなるインキ吸蔵体４が前端開口部より圧入され
る。前記インキ吸蔵体４は、吸蔵体収容部８に圧入する
以前は、直円柱状であり、均一な毛細間隙（即ち均一な
毛細管力）を備えている。そして、前記吸蔵体収容部８
の内面は、後方に行くに従って漸次小径となるテーパ状
（円錐状）内面であるため、前記インキ吸蔵体４は、そ
のテーパ状内面に沿って圧縮され、前端から後端に向か
うに従って繊維の密度が連続的に増加され、前部から後
部へ向かうに従い次第に毛細管力を強くしたインキ保留
部５（テーパ状圧縮部）が構成される。さらに、前記吸
蔵体収容部８のテーパ状内面の後端には、該テーパ状内
面より小径のストレート状内面が形成されており、それ
により、インキ吸蔵体４の後端部がストレート状に圧縮
され、液密部６（ストレート状圧縮部）が構成される。The ink occlusion body 4 made of a heat-sealed body of a synthetic resin fiber bundle (for example, a polyester resin fiber bundle) is press-fitted into the occlusion body accommodating section 8 from the front end opening. Before the ink occlusion body 4 is press-fitted into the occlusion body accommodating section 8, the ink occlusion body 4 has a right cylindrical shape and has a uniform capillary gap (that is, a uniform capillary force). And the above-mentioned occlusion body accommodation part 8
Is a tapered (conical) inner surface whose diameter becomes gradually smaller toward the rear, so that the ink occluding body 4 is compressed along the tapered inner surface, and the density of the fiber increases from the front end to the rear end. Is continuously increased, and an ink retaining section 5 (tapered compression section) is formed in which the capillary force gradually increases from the front to the rear. Further, a straight inner surface having a diameter smaller than that of the tapered inner surface is formed at the rear end of the tapered inner surface of the occluding body housing section 8, whereby the rear end portion of the ink occluding body 4 is compressed into a straight shape. Thus, a liquid-tight part 6 (straight compression part) is formed.
【００５１】前記インキ吸蔵体４の軸心には、合成樹脂
製繊維（例えばポリエステル繊維、アクリル繊維等）の
樹脂加工体からなる棒状のインキ誘導部材９が、インキ
吸蔵体４の前方から後方へ突き刺し貫通させることによ
って取り付けられ、インキ誘導部材９の外周面がインキ
吸蔵体４内周面（即ち、インキ保留部５及び液密部６）
と直接接触されている。前記インキ誘導部材９の後端
は、硬質な尖頭部材９１が固着され、それにより、イン
キ吸蔵体４への挿入性を向上させている。また、前記イ
ンキ誘導部材９の前端は、適宜形状に形成され、ペン先
２として前方外部へ突出している。At the axis of the ink occluding member 4, a rod-shaped ink guiding member 9 made of a resin processed material of synthetic resin fiber (for example, polyester fiber or acrylic fiber) is provided from the front to the rear of the ink occluding member 4. The ink guide member 9 is attached by piercing and penetrating so that the outer peripheral surface of the ink guide member 9 is the inner peripheral surface of the ink occluding body 4 (that is, the ink retaining section 5 and the liquid tight section 6).
Is in direct contact with A hard pointed member 91 is fixed to the rear end of the ink guide member 9, thereby improving the insertability into the ink occluding body 4. The front end of the ink guide member 9 is formed in an appropriate shape, and protrudes outward as a pen tip 2.
【００５２】また、前記隔壁７１には、インキ誘導部材
９の後端の尖頭部材９１を保持する筒状支持部７２が形
成されインキタンク３内に突設されている。前記筒状支
持部７２には、インキタンク３とインキ誘導部材９を連
通させ、且つ、インキタンク３とインキ吸蔵体４（液密
部６）とを連通させるスリット７３が設けられる。The partition 71 is provided with a cylindrical support 72 for holding a pointed member 91 at the rear end of the ink guide member 9, and protrudes into the ink tank 3. The cylindrical support portion 72 is provided with a slit 73 for communicating the ink tank 3 with the ink guide member 9 and for communicating the ink tank 3 with the ink occluding body 4 (liquid-tight portion 6).
【００５３】また、前記軸筒７の前端開口部には、ペン
先保持部材７５が固着され、ペン先２外面を保持してい
る。ペン先保持部材７５は、内面にリブ７５ａが設けら
れ、インキ吸蔵体４の前端を当接支持し、インキ吸蔵体
４の脱落を防止している。A pen tip holding member 75 is fixed to the front end opening of the barrel 7, and holds the outer surface of the pen tip 2. The pen tip holding member 75 is provided with a rib 75a on its inner surface, abuts and supports the front end of the ink occluding body 4, and prevents the ink occluding body 4 from dropping off.
【００５４】図２は図１の直液式筆記具１の作用を説明
するものである。ペン先２からインキ保留部５の任意位
置までの高さをＨ、インキ保留部５内の前記任意位置で
の毛細管力をＴ、前記高さＨのペン先水頭圧をＧとする
とき、前記毛細管力Ｔは、前記ペン先水頭圧Ｇより３大
きい（即ち、Ｔ＞Ｇ）。さらに、前記毛細管力Ｔと前記
ペン先水頭圧Ｇの差（Ｔ−Ｇ）は、インキ保留部５前端
からインキ保留部５後端へ向かうに従い大きくなってい
る。FIG. 2 explains the operation of the direct liquid writing instrument 1 of FIG. When the height from the pen tip 2 to an arbitrary position of the ink storage unit 5 is H, the capillary force at the arbitrary position in the ink storage unit 5 is T, and the pen head pressure at the height H is G, The capillary force T is 3 greater than the pen tip head pressure G (that is, T> G). Further, the difference (TG) between the capillary force T and the pen tip head pressure G increases from the front end of the ink storage unit 5 to the rear end of the ink storage unit 5.
【００５５】そのため、インキタンク３にインキを充填
しペン先２を下向きにして保管したとき、インキタンク
３内のインキは、該インキタンク３の内圧変化に応じて
インキ吸蔵体４に溢出される。前記溢出インキは、イン
キ吸蔵体４の後端の液密部６、及び該液密部６前方のイ
ンキ保留部５に空気を侵入させることなく連続的に保持
されている。その結果、インキタンク３の減圧時、イン
キ保留部５からインキタンク３へのインキのリターンバ
ックを途切れのない円滑なものにする。Therefore, when the ink tank 3 is filled with ink and stored with the pen tip 2 facing downward, the ink in the ink tank 3 overflows to the ink occluding body 4 according to the change in the internal pressure of the ink tank 3. . The spilled ink is continuously held in the liquid-tight portion 6 at the rear end of the ink occluding body 4 and in the ink storing portion 5 in front of the liquid-tight portion 6 without allowing air to enter. As a result, when the ink tank 3 is depressurized, the return back of the ink from the ink storage unit 5 to the ink tank 3 is made smooth without interruption.
【００５６】（第２実施例）図３に本発明・直液式筆記
具１の第２実施例を示す。(Second Embodiment) FIG. 3 shows a second embodiment of the direct liquid writing instrument 1 of the present invention.
【００５７】直液式筆記具１は、主に、前部に吸蔵体収
容部８を備えると共に後部にインキタンク３を備える軸
筒７と、前記吸蔵体収容部８に収容させたインキ吸蔵体
４と、前記インキ吸蔵体４に軸方向に貫装された、ペン
先２を兼ねるインキ誘導部材９とからなる。The direct liquid writing instrument 1 mainly comprises a shaft cylinder 7 having an occluder housing section 8 at the front and an ink tank 3 at the rear, and an ink occluder 4 housed in the occluder housing section 8. And an ink guide member 9 which also penetrates the ink occluding body 4 in the axial direction and also serves as the pen tip 2.
【００５８】前記軸筒７は、円筒状の合成樹脂（例え
ば、ポリプロピレン、ポリエチレン等）の射出成形体で
あり、その前部に、前方に向かうに従って小径となるテ
ーパ状の挿入部８１を軸心に備えた環状の吸蔵体収容部
８が設けられる。前記吸蔵体収容部８の後方には、隔壁
７１を介して、インキを直に貯液する空間部であるイン
キタンク３が設けられる。前記軸筒７のインキタンク３
の後端開口部には、尾栓７４が固着されている。The shaft cylinder 7 is an injection-molded body made of a cylindrical synthetic resin (for example, polypropylene, polyethylene, etc.), and has a tapered insertion portion 81 having a tapered front portion having a smaller diameter toward the front. Is provided with an annular occlusion body accommodating section 8 provided in the above. An ink tank 3, which is a space for directly storing ink, is provided behind the storage unit 8 via a partition 71. The ink tank 3 of the barrel 7
A tail plug 74 is fixed to the rear end opening.
【００５９】また、前記隔壁７１には、インキタンク３
とインキ吸蔵体４とを連通させるスリット７３が設けら
れると共に、吸蔵体収容部８側の前方へ突出する前記挿
入部８１が一体に連設されている。前記挿入部８１は、
その基部のストレート状外面と、該ストレート状外面か
ら前方に向かうに従い先細のテーパ状外面とからなる。The partition 71 is provided with the ink tank 3.
A slit 73 is provided for communicating the ink storage unit 4 with the ink storage unit 4, and the insertion portion 81 protruding forward on the storage unit storage unit 8 side is integrally connected. The insertion portion 81
It comprises a straight outer surface of the base and a tapered outer surface tapering forward from the straight outer surface.
【００６０】前記吸蔵体収容部８内には、合成樹脂繊維
束（例えばポリエステル繊維束）の熱融着加工体からな
るインキ吸蔵体４が前端開口部より圧入される。前記吸
蔵体収容部８は、その軸心部に、挿入部８１を備えてい
るため、前記インキ吸蔵体４が圧入されると、前記イン
キ吸蔵体４の軸心に前記挿入部８１が挿入され、前記イ
ンキ吸蔵体４の軸心の内面が前記挿入部８１のテーパ状
外面及びストレート状外面に沿って圧縮される。前記テ
ーパ状外面により、後部に行くに従い毛細間隙の間隙幅
を連続的に小さくし、前部から後部へ向かうに従い漸次
毛細管力を強くしたインキ保留部５（テーパ状圧縮部）
が構成され、同時に、前記ストレート状外面により、液
密部６（ストレート状圧縮部）が構成される。The ink occlusion body 4 made of a heat-sealed body of a synthetic resin fiber bundle (for example, a polyester fiber bundle) is press-fitted into the occlusion body accommodating portion 8 from the front end opening. Since the occlusion body accommodating portion 8 is provided with the insertion portion 81 at the axis thereof, when the ink occlusion body 4 is press-fitted, the insertion portion 81 is inserted into the axis of the ink occlusion body 4. The inner surface of the axial center of the ink occluding body 4 is compressed along the tapered outer surface and the straight outer surface of the insertion portion 81. The ink retaining portion 5 (tapered compression portion) in which the gap width of the capillary gap is continuously reduced toward the rear portion and the capillary force is gradually increased from the front portion to the rear portion by the tapered outer surface.
At the same time, the liquid-tight portion 6 (straight compression portion) is formed by the straight outer surface.
【００６１】前記挿入部８１の軸心には、合成樹脂製繊
維（例えばポリエステル繊維、アクリル繊維等）の樹脂
加工体からなるインキ誘導部材９が貫装されている。前
記インキ誘導部材９の後端は、インキタンク３内に突出
し、一方、前記インキ誘導部材９の前端は、ペン先２と
して軸筒７前端より外部に突出している。An ink guide member 9 made of a resin processed body made of synthetic resin fiber (for example, polyester fiber, acrylic fiber, etc.) is inserted through the axis of the insertion portion 81. The rear end of the ink guide member 9 projects into the ink tank 3, while the front end of the ink guide member 9 projects outside the front end of the barrel 7 as the pen tip 2.
【００６２】また、第１実施例同様、軸筒７の前端開口
部には、ペン先保持部材７５が固着され、ペン先２外面
を保持している。前記ペン先保持部材７５は、内面にリ
ブ７５ａが設けられ、該リブ７５ａにより、インキ吸蔵
体４の前端が当接支持され、インキ吸蔵体４の脱落を防
止している。As in the first embodiment, a pen tip holding member 75 is fixed to the front end opening of the barrel 7, and holds the outer surface of the pen tip 2. The pen tip holding member 75 is provided with a rib 75a on the inner surface, and the rib 75a supports the front end of the ink occluding member 4 so as to prevent the ink occluding member 4 from falling off.
【００６３】（第３実施例）図４に本発明・直液式筆記
具１の第３実施例を示す。これは、インキ吸蔵体４が、
軸筒７に組み込む前に予め、前端から後端に向かうに従
って漸次、その毛細間隙を密にしてなる構成であり、圧
縮を利用していないためその形状は直円筒状である。
尚、本実施例の作用効果及び他の構成は、第１実施例同
様である。(Third Embodiment) FIG. 4 shows a third embodiment of the direct liquid writing instrument 1 according to the present invention. This is because the ink occluder 4
Before assembling into the shaft cylinder 7, the capillary gap is gradually made denser from the front end to the rear end. Since compression is not used, the shape is a straight cylindrical shape.
The operation and effect of this embodiment and other configurations are the same as those of the first embodiment.
【００６４】（第４実施例）図５に本発明・直液式筆記
具１の第４実施例を示す。インキ吸蔵体４が、合成樹脂
製連続気泡体からなる、毛細間隙の密度の異なる複数の
環状体４ａ、４ｂ、４ｃ、４ｄ、４ｅ、４ｆよりなり、
毛細間隙の大きい（即ち毛細管力の弱い）もの４ｆから
毛細間隙の小さい（即ち毛細管力の強い）もの４ａの順
に前端から後端へ積み重ねて、毛細管力を後方に向かう
に従って段階的に強くなるよう設定してなる構成であ
る。尚、本実施例の作用効果及び他の構成は、第１実施
例同様である。(Fourth Embodiment) FIG. 5 shows a fourth embodiment of the direct liquid writing instrument 1 of the present invention. The ink occluding body 4 is composed of a plurality of annular bodies 4a, 4b, 4c, 4d, 4e, and 4f having different capillaries densities, which are made of synthetic resin open cells;
Those having a large capillary gap (ie, having a weak capillary force) 4f and those having a small capillary gap (ie, having a strong capillary force) 4a are stacked in order from the front end to the rear end so that the capillary force gradually increases toward the rear. It is a configuration that is set. The operation and effect of this embodiment and other configurations are the same as those of the first embodiment.
【００６５】[0065]
【発明の効果】本発明・直液式筆記具は、請求項１の構
成によって、ペン先下向き状態でインキタンクの内圧が
上昇したとしても、インキタンクからのインキをインキ
吸蔵体の前部に集中させることを防ぎ、その結果、落下
等の衝撃時やキャップの取り外し時のインキの外部への
飛び散りや漏出を回避できる。According to the first aspect of the present invention, even if the internal pressure of the ink tank rises with the pen pointed downward, the direct liquid writing instrument concentrates the ink from the ink tank on the front part of the ink occluding body. As a result, it is possible to prevent the ink from scattering or leaking to the outside at the time of impact such as dropping or removing the cap.
【００６６】本発明・直液式筆記具は、請求項２の構成
によって、内圧上昇の際のインキタンク内の溢出インキ
を、インキ吸蔵体の後部からその前方に渡って分布させ
ることができ、従来のようにインキをインキ吸蔵体前部
に集中的に存在させてインキ吸蔵体の後部に空気を侵入
させることがない。そのため、インキタンク内で空気の
膨張・収縮が繰り返されても、インキ吸蔵体内にインキ
を残留させないため、落下等の衝撃時やキャップの取り
外し時のインキの漏出事故を、より一層、防止できる。According to the present invention, the direct liquid type writing instrument can distribute the overflowing ink in the ink tank when the internal pressure is increased from the rear part of the ink occluding body to the front part thereof. As described above, the ink is concentrated at the front of the ink occluding body so that air does not enter the rear of the ink occluding body. Therefore, even if the expansion and contraction of air is repeated in the ink tank, the ink does not remain in the ink storage body, so that it is possible to further prevent the ink from leaking at the time of impact such as dropping or at the time of removing the cap.
【００６７】さらに、前記直液筆記具（請求項２）は、
インキ吸蔵体後部に空気を閉じ込めることがないため、
従来のように敢えて通気路を設けなくても、インキ漏出
を回避できる。そのため、筆記具自体がシンプルな構造
となり、製造コストを抑え、安価に提供できる。しか
も、合成樹脂成形体により軸筒等の部材を構成する場
合、ヒケによる外観不良やキャップ装着時の気密不良を
生じさせるおそれがない。Furthermore, the direct liquid writing instrument (Claim 2)
Because air is not trapped in the rear of the ink storage body,
Ink leakage can be avoided without intentionally providing a ventilation path as in the related art. For this reason, the writing implement itself has a simple structure, so that the manufacturing cost can be reduced and the writing implement can be provided at low cost. In addition, when a member such as a shaft cylinder is formed of a synthetic resin molded body, there is no risk of causing poor appearance due to sink marks and poor airtightness when the cap is attached.
【００６８】本発明・直液式筆記具は、請求項３の構成
によって、インキタンク減圧の際、インキタンクへイン
キ吸蔵体のインキを途切れなくリターンバックでき、イ
ンキ吸蔵体にインキを残留させず、インキ吸蔵体前部よ
りインキを漏出させるおそれがない。According to the third aspect of the present invention, when the ink tank is depressurized, the ink of the ink occluding body can be returned to the ink tank without interruption, and the ink does not remain in the ink occluding body. There is no risk of ink leaking from the front of the ink occluding body.
【００６９】本発明・直液式筆記具は、請求項４の構成
によって、毛細管力の強さの設定を容易且つ確実に行う
ことができ、製造上有利である。According to the fourth aspect of the present invention, the direct liquid writing instrument can easily and reliably set the strength of the capillary force, which is advantageous in manufacturing.
【００７０】本発明・直液式筆記具は、請求項５の構成
によって、インキタンク内のインキが、インキ誘導部材
を介してペン先へ常時供給され、筆跡途切れのない潤沢
なインキ吐出を可能にする。According to the fifth aspect of the present invention, the ink in the ink tank is always supplied to the pen tip through the ink guide member, and the ink can be discharged without interruption in the handwriting. I do.
【００７１】本発明・直液式筆記具は、請求項６の構成
によって、ペン先下向き状態でインキタンクの内圧が上
昇したとしても、インキタンクからのインキを、インキ
吸蔵体の前部に集中させず、その結果、落下等の衝撃時
やキャップの取り外し時のインキの外部への飛び散りや
漏出を回避できる。その上、インキ吸蔵体外面を圧縮さ
せることにより、毛細管力の強さを変化させることか
ら、製造が容易となり、安価な直液式筆記具を提供でき
る。According to the sixth aspect of the present invention, even when the internal pressure of the ink tank rises with the pen pointed downward, the direct liquid writing instrument concentrates the ink from the ink tank on the front part of the ink storage body. As a result, it is possible to prevent the ink from scattering or leaking to the outside at the time of impact such as dropping or removing the cap. In addition, since the strength of the capillary force is changed by compressing the outer surface of the ink occluding body, the manufacturing becomes easy and an inexpensive direct liquid writing instrument can be provided.
【００７２】本発明・直液式筆記具は、請求項７の構成
から、テーパ状圧縮部によってインキ吸蔵体の前部にイ
ンキを集中させないため、落下等の衝撃時やキャップの
取り外し時のインキの外部への飛び散りや漏出を回避で
きる。その上、前記テーパ状の圧縮により、毛細管力の
強さの設定を容易且つ確実に行うことができ、製造上有
利である。また、前記ストレート状圧縮部により、イン
キ吸蔵体内のインキをインキタンクへ途切れなくリター
ンバックでき、インキ吸蔵体にインキを残留させず、イ
ンキ吸蔵体前部よりインキを漏出させるおそれがない。According to the present invention, since the ink is not concentrated on the front portion of the ink absorbing member by the tapered compression portion, the direct liquid writing instrument of the present invention has the advantage that the ink can be removed at the time of impact such as dropping or removing the cap. Splashes and leakage to the outside can be avoided. In addition, the strength of the capillary force can be easily and reliably set by the tapered compression, which is advantageous in manufacturing. In addition, the straight compression section allows the ink in the ink occluding body to return to the ink tank without any interruption, so that the ink does not remain in the ink occluding body and there is no possibility that the ink leaks from the front portion of the ink occluding body.
【００７３】本発明・直液式筆記具は、請求項８の構成
によって、ペン先下向き状態でインキタンクの内圧が上
昇したとしても、インキタンクからのインキを、インキ
吸蔵体の前部に集中させず、その結果、落下等の衝撃時
やキャップの取り外し時のインキの外部への飛び散りや
漏出を回避できる。その上、インキ吸蔵体内面を圧縮さ
せることにより、毛細管力の強さを変化させることか
ら、製造が容易となり、安価な直液式筆記具を提供でき
る。According to the present invention, even if the internal pressure of the ink tank rises with the pen pointed downward, the ink from the ink tank concentrates on the front part of the ink storage body. As a result, it is possible to prevent the ink from scattering or leaking to the outside at the time of impact such as dropping or removing the cap. In addition, since the strength of the capillary force is changed by compressing the inner surface of the ink occlusion body, the manufacturing becomes easy and an inexpensive direct liquid writing instrument can be provided.
【００７４】本発明・直液式筆記具は、請求項９の構成
から、テーパ状圧縮部によってインキ吸蔵体の前部にイ
ンキを集中させないため、落下等の衝撃時やキャップの
取り外し時のインキの外部への飛び散りや漏出を回避で
きる。その上、前記テーパ状の圧縮により、毛細管力の
強さの設定を容易且つ確実に行うことができ、製造上有
利である。また、前記ストレート状圧縮部により、イン
キ吸蔵体内のインキをインキタンクへ途切れなくリター
ンバックでき、インキ吸蔵体にインキを残留させず、イ
ンキ吸蔵体前部よりインキを漏出させるおそれがない。According to the present invention, since the ink is not concentrated on the front part of the ink absorbing member by the tapered compression part, the direct liquid type writing instrument according to the ninth aspect of the present invention has the advantage that the ink can be used at the time of impact such as dropping or at the time of removing the cap. Splashes and leakage to the outside can be avoided. In addition, the strength of the capillary force can be easily and reliably set by the tapered compression, which is advantageous in manufacturing. In addition, the straight compression section allows the ink in the ink occluding body to return to the ink tank without any interruption, so that the ink does not remain in the ink occluding body and there is no possibility that the ink leaks from the front portion of the ink occluding body.
【図１】本発明の第１実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
【図２】本発明第１実施例の作用を説明する縦断面図で
ある。FIG. 2 is a longitudinal sectional view for explaining the operation of the first embodiment of the present invention.
【図３】本発明の第２実施例を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a second embodiment of the present invention.
【図４】本発明の第３実施例を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing a third embodiment of the present invention.
【図５】本発明の第４実施例を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing a fourth embodiment of the present invention.
【図６】従来例を示す縦断面図である。FIG. 6 is a longitudinal sectional view showing a conventional example.
【図７】従来例を示す縦断面図である。FIG. 7 is a longitudinal sectional view showing a conventional example.
１ 直液式筆記具 ２ ペン先 ３ インキタンク ４ インキ吸蔵体 ４ａ〜４ｆ 環状体 ５ インキ保留部（テーパ状圧縮部） ６ 液密部（ストレート状圧縮部） ７ 軸筒 ７１ 隔壁 ７２ 筒状支持部 ７３ スリット ７４ 尾栓 ７５ ペン先保持部材 ７５ａ リブ ８ 吸蔵体収容部 ８１ 挿入部 ９ インキ誘導部材 ９１ 尖頭部材 １０ インキ Ｈ ペン先からインキ保留部の任意位置までの高さ Ｔ インキ保留部内の前記任意位置での毛細管力 Ｇ 前記高さＨのペン先水頭圧 DESCRIPTION OF SYMBOLS 1 Direct liquid writing implement 2 Pen tip 3 Ink tank 4 Ink occlusion body 4a-4f Annular body 5 Ink storing part (tapered compression part) 6 Liquid tight part (straight compression part) 7 Shaft cylinder 71 Partition wall 72 Cylindrical support part 73 Slit 74 Tail plug 75 Pen tip holding member 75 a Rib 8 Occlusion body storage section 81 Insertion section 9 Ink guide member 91 Pointed member 10 Ink H Height from pen tip to any position of ink holding section T The above in ink holding section Capillary force at arbitrary position G Nib head pressure at height H
Claims (9)
料よりなるインキ吸蔵体を配置した直液式筆記具であっ
て、前記インキ吸蔵体に、その前部から後部へ向かうに
従い漸次毛細管力を強くしたインキ保留部を設けたこと
を特徴とする直液式筆記具。1. A direct liquid type writing instrument having an ink occluding body made of a porous material disposed between a pen tip and an ink tank, wherein the ink occluding body is provided with a capillary tube gradually from a front portion to a rear portion thereof. A direct liquid type writing implement characterized by having an ink holding section with increased strength.
の任意の位置での毛細管力を、ペン先から前記任意の位
置までの高さのペン先水頭圧より大きくすると共に、前
記毛細管力と前記ペン先水頭圧の差を、インキ保留部前
端からインキ保留部後端へ向かうに従い漸次大きくした
請求項１記載の直液式筆記具。2. The method according to claim 1, wherein the capillary force at an arbitrary position in the ink holding portion is made larger than the head pressure of the pen tip at a height from the pen tip to the arbitrary position in the downward state of the pen tip. 2. The direct liquid writing implement according to claim 1, wherein the difference in the head pressure of the pen tip is gradually increased from the front end of the ink holding section toward the rear end of the ink holding section.
部より毛細管力の強い、軸方向に適宜長さを有する液密
部を設けてなる請求項１又は２記載の直液式筆記具。3. A direct liquid writing instrument according to claim 1, wherein a liquid-tight part having a stronger capillary force than the ink holding part and having an appropriate length in the axial direction is provided at a rear end of the ink holding part. .
に圧縮し、毛細間隙の間隙幅を変化させることによって
毛細管力を所定の強さに設定してなる請求項１、２又は
３記載の直液式筆記具。4. The capillary force is set to a predetermined strength by radially compressing an outer surface or an inner surface of the ink occluding body and changing a gap width of the capillary gap. Direct writing instrument.
の毛細管力よりも強い毛細管力を有するインキ誘導部材
を配設し、前記インキタンクと前記ペン先との間を連通
させてなる請求項１、２、３、又は４記載の直液式筆記
具。5. The ink storage device according to claim 1, further comprising an ink guide member having a capillary force greater than that of the ink storage member, and communicating between the ink tank and the pen tip. The direct liquid writing implement according to 1, 2, 3, or 4.
料よりなるインキ吸蔵体を配置した直液式筆記具であっ
て、前記インキ吸蔵体の外面を、その前部から後部に向
かうに従い漸次小径となるよう圧縮し、前記インキ吸蔵
体の毛細間隙の間隙幅を、その前部から後部へ向かうに
従い漸次小さくしたインキ保留部を設けたこと特徴とす
る直液式筆記具。6. A direct liquid type writing instrument in which an ink occluding body made of a porous material is disposed between a pen tip and an ink tank, wherein the outer surface of the ink occluding body extends from the front to the rear. A direct-liquid writing implement, comprising: an ink retaining portion that is compressed so as to have a gradually smaller diameter and a gap width of a capillary gap of the ink occluding body is gradually reduced from a front portion to a rear portion thereof.
料よりなるインキ吸蔵体を配置した直液式筆記具であっ
て、前記インキ吸蔵体の外面に、その前部から後部に向
かうに従い漸次小径となるテーパ状圧縮部を設けると共
に、前記テーパ状圧縮部の後端に該テーパ状圧縮部より
小径のストレート状圧縮部を設けたことを特徴とする直
液式筆記具。7. A direct liquid writing instrument having an ink occluding body made of a porous material disposed between a pen tip and an ink tank, wherein the ink occluding body is provided on an outer surface of the ink occluding body from a front portion to a rear portion thereof. A direct liquid writing instrument, comprising: a tapered compression portion having a gradually decreasing diameter; and a straight compression portion having a smaller diameter than the tapered compression portion is provided at a rear end of the tapered compression portion.
料よりなるインキ吸蔵体を配置した直液式筆記具であっ
て、前記インキ吸蔵体の内面を、その前部から後部に向
かうに従い漸次大径となるよう圧縮し、前記インキ吸蔵
体の毛細間隙の間隙幅を、その前部から後部へ向かうに
従い漸次小さくしたインキ保留部を設けたこと特徴とす
る直液式筆記具。8. A direct liquid type writing instrument in which an ink occluding body made of a porous material is disposed between a pen tip and an ink tank, wherein an inner surface of the ink occluding body is arranged from a front portion to a rear portion thereof. A direct-liquid writing implement, comprising: an ink retaining portion that is compressed so as to have a gradually larger diameter, and the gap width of the capillary gap of the ink occluding body is gradually reduced from the front to the rear.
料よりなるインキ吸蔵体を配置した直液式筆記具であっ
て、前記インキ吸蔵体の内面に、その前部から後部に向
かうに従い漸次大径となるテーパ状圧縮部を設けると共
に、前記テーパ状圧縮部の後端に該テーパ状圧縮部より
大径のストレート状圧縮部を設けたことを特徴とする直
液式筆記具。9. A direct liquid type writing instrument having an ink occluding body made of a porous material disposed between a pen tip and an ink tank, wherein the ink occluding body is provided on an inner surface of the ink occluding body from a front portion to a rear portion thereof. A direct liquid writing instrument, comprising: a tapered compression portion having a gradually increasing diameter; and a straight compression portion having a larger diameter than the tapered compression portion is provided at a rear end of the tapered compression portion.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24993797A JP3917259B2 (en) | 1997-08-29 | 1997-08-29 | Direct liquid writing instrument |
| CA002246422A CA2246422A1 (en) | 1997-08-29 | 1998-08-27 | Direct liquid supply writing implement |
| EP98116356A EP0899128B1 (en) | 1997-08-29 | 1998-08-28 | Direct liquid supply writing implement |
| US09/141,560 US5967687A (en) | 1997-08-29 | 1998-08-28 | Direct liquid supply writing implement |
| CN98117657A CN1073021C (en) | 1997-08-29 | 1998-08-28 | Direct liquid supply writing implement |
| KR1019980035065A KR19990023957A (en) | 1997-08-29 | 1998-08-28 | Direct writing instruments |
| TW087114263A TW409101B (en) | 1997-08-29 | 1998-08-28 | Direct liquid supply writing implement |
| DE69802756T DE69802756T2 (en) | 1997-08-29 | 1998-08-28 | Pen with direct fluid supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24993797A JP3917259B2 (en) | 1997-08-29 | 1997-08-29 | Direct liquid writing instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1178352A true JPH1178352A (en) | 1999-03-23 |
| JP3917259B2 JP3917259B2 (en) | 2007-05-23 |
Family
ID=17200397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24993797A Expired - Fee Related JP3917259B2 (en) | 1997-08-29 | 1997-08-29 | Direct liquid writing instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3917259B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003070485A1 (en) * | 2002-02-22 | 2003-08-28 | Man-Hwa Baik | A writing instrument |
| JP2007168307A (en) * | 2005-12-22 | 2007-07-05 | Fan Jiang Hong | Automatic adjusting and control structure for liquid for writing |
| JP2008023755A (en) * | 2006-07-19 | 2008-02-07 | Pilot Ink Co Ltd | Direct liquid type writing utensil |
| JP2008183896A (en) * | 2006-03-09 | 2008-08-14 | Pilot Ink Co Ltd | Direct liquid type writing utensil |
| KR100932571B1 (en) | 2004-09-14 | 2009-12-17 | 파일롯트 잉크 가부시키가이샤 | Direct Writing Instruments |
-
1997
- 1997-08-29 JP JP24993797A patent/JP3917259B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003070485A1 (en) * | 2002-02-22 | 2003-08-28 | Man-Hwa Baik | A writing instrument |
| KR100932571B1 (en) | 2004-09-14 | 2009-12-17 | 파일롯트 잉크 가부시키가이샤 | Direct Writing Instruments |
| JP2007168307A (en) * | 2005-12-22 | 2007-07-05 | Fan Jiang Hong | Automatic adjusting and control structure for liquid for writing |
| JP2008183896A (en) * | 2006-03-09 | 2008-08-14 | Pilot Ink Co Ltd | Direct liquid type writing utensil |
| JP2008023755A (en) * | 2006-07-19 | 2008-02-07 | Pilot Ink Co Ltd | Direct liquid type writing utensil |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3917259B2 (en) | 2007-05-23 |
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