JP4658259B2 - Direct liquid writing instrument - Google Patents

Direct liquid writing instrument Download PDF

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Publication number
JP4658259B2
JP4658259B2 JP2005258773A JP2005258773A JP4658259B2 JP 4658259 B2 JP4658259 B2 JP 4658259B2 JP 2005258773 A JP2005258773 A JP 2005258773A JP 2005258773 A JP2005258773 A JP 2005258773A JP 4658259 B2 JP4658259 B2 JP 4658259B2
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ink
writing instrument
occlusion body
direct liquid
communication pipes
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JP2006240281A (en
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哲宏 栗田
孝男 稲葉
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Pilot Ink Co Ltd
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Pilot Ink Co Ltd
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Description

本発明は、インキタンク内にインキを直に貯溜し、前記インキタンクとペン先との間にインキ吸蔵体を介在させた直液式筆記具に関する。尚、本発明において、「前」とはペン先側を指し、「後」とはインキタンク側を指す。   The present invention relates to a direct liquid writing instrument in which ink is directly stored in an ink tank and an ink occlusion body is interposed between the ink tank and a pen tip. In the present invention, “front” refers to the pen tip side, and “rear” refers to the ink tank side.

〔１〕従来、この種の直液式筆記具において、例えば、特許文献１には、「インク容体の上方開口部に連絡孔（連絡管）と貫通孔とを有し吸収性材を充填した収容体を挿嵌し吸収性材に連絡する筆穂を設け通気管を貫通孔に挿通し外気とインキ容体とを連絡したことを特徴とする筆記具。」が開示されている。 [1] Conventionally, in this type of direct liquid writing instrument, for example, Patent Document 1 discloses that “the upper opening of an ink container has a communication hole (communication tube) and a through hole and is filled with an absorbent material. A writing instrument characterized in that a brush is inserted into the body and communicated with the absorbent material, the ventilation tube is inserted into the through hole, and the outside air and the ink container are communicated.

前記特許文献１の直液式筆記具は、インク容体の上方開口部に連絡管及び通気管を備えているとしても、常時、通気管が外気と連通する構成である。そのため、ペン先下向き状態を維持すると、外気が通気管を通してインク容体内に供給し続けられると同時に、インク容体内のインキが連絡管を通して吸収性材に供給し続けられる。その結果、インキ容体内のインキがペン先側より外部に漏出するおそれがある。   The direct liquid writing instrument of Patent Document 1 has a configuration in which the vent pipe is always in communication with the outside air even if the connecting pipe and the vent pipe are provided in the upper opening of the ink container. For this reason, when the pen tip downward state is maintained, the outside air continues to be supplied to the ink container through the vent pipe, and at the same time, the ink in the ink container continues to be supplied to the absorbent material through the connecting pipe. As a result, the ink in the ink container may leak out from the pen tip side.

〔２〕また、従来、特許文献２には、「容器本体内の一側に密閉用蓋体を着脱可能としたインキ補給口を有するインキ収納室を設けると共に、本体先端開口部側には上記インキ収納室とは隔壁にて分離されたインキ吸液材収納室を開口部と連通する状態として設け、該収納室内には二分割された通気性を有する吸液材を収納し、且つ先端開口部側の吸液材にはペン先の基部を抱持させると共にその基部端面はインキ収納室側の吸液材を接触させ、上記隔壁には収納インキを吸液材へ給液させるための給液孔を穿設すると共に、適宜な給気管を固定させ且つこの給気管の一方の端面開口部を本体先端開口部側の吸液材に当接させ、他方の端面開口部をインキ補給口附近のインキ収納室内に位置させたことを特徴とするサインペン。」が開示されている。 [2] Conventionally, Patent Document 2 states that “an ink storage chamber having an ink supply port in which a sealing lid is detachable is provided on one side of a container body, and the above-mentioned main body opening portion side The ink storage chamber is provided with a state in which an ink absorbing material storage chamber separated by a partition wall is communicated with the opening, and the storage chamber stores a liquid absorbing material having air permeability divided into two, and has a front end opening. The base side of the pen tip is held by the liquid-absorbing material on the part side, and the liquid-absorbing material on the side of the ink storage chamber is brought into contact with the end surface of the base. A liquid hole is drilled, an appropriate air supply pipe is fixed, one end face opening of this air supply pipe is brought into contact with the liquid absorbing material on the front end opening side of the main body, and the other end face opening is close to the ink supply port. Sign pen characterized by being positioned in the ink storage chamber of There.

前記特許文献２の直液式筆記具は、二つの吸液材を備え、給気管の前端面を本体先端開口部側の吸液材の後端面に当接させ、給液孔がインキ収納室側の吸液材の後端面に連通する構成、即ち、給気管の前端開口部と給液孔の前端開口部とが前後に離れて位置する構成である。そのため、給液孔から供給されて吸液材に含浸されたインキによって給気管の開口端を塞ぐこと（即ち給気管の開口端を液シール状態にすること）が困難となり、インキタンクからのインキ流出とインキタンクへの空気流入（即ちインキと空気の交替）を確実に停止させることができない。その結果、過剰のインキが吸液材に供給され、インキがペン先側より外部に漏出するおそれがある。   The direct liquid writing instrument of Patent Document 2 includes two liquid-absorbing materials, the front end surface of the air supply pipe is brought into contact with the rear end surface of the liquid-absorbing material on the front end of the main body, and the liquid supply hole is on the ink storage chamber side. In this configuration, the front end opening of the air supply pipe and the front end opening of the liquid supply hole are spaced apart from each other. For this reason, it becomes difficult to close the open end of the supply pipe with ink supplied from the liquid supply hole and impregnated in the liquid absorbing material (that is, to make the open end of the supply pipe liquid-sealed). The outflow and the air inflow into the ink tank (that is, the change of ink and air) cannot be stopped reliably. As a result, excessive ink may be supplied to the liquid absorbing material, and the ink may leak out from the pen tip side.

さらに、前記特許文献２の直液式筆記具は、ペン先が、本体先端開口部側の吸液材を貫通して、インキ収納室側の吸液材に接触する構成のため、ペン先の長手寸法を短く設定することが困難である。そのため、ペン先のコストが上昇し、ユーザーに安価に提供できず、しかも、ペン先後端からペン先先端までのインキ流出路が長くなり、ペン先からのインキ流出性が低下し、筆跡カスレや筆跡途切れが生じやすい。   Furthermore, the direct liquid type writing instrument of Patent Document 2 has a configuration in which the pen tip penetrates the liquid absorbing material on the side of the main body opening and contacts the liquid absorbing material on the ink storage chamber side. It is difficult to set the dimensions short. As a result, the cost of the pen tip increases and cannot be provided to the user at a low cost, and the ink outflow path from the pen tip rear end to the tip of the pen tip becomes longer, the ink outflow from the pen tip decreases, Handwriting breaks easily occur.

〔３〕また、従来、特許文献３には、「前軸内にインキ調整管、インキ導管を同心に配置し、インキ導管に中継芯を挿入し、その後端をインキ室（インキタンク）に挿入し、先端を毛筆体後端に所定の間隙を存して位置させ、インキ調整管とインキ導管間の環状路内及び毛筆体後端上には多孔質材からなるインキ吸収体を装着し、その先端の密度を他の部分より大となし、毛筆体後端にはインキ通路を形成し、前軸内面とインキ調整管外面間には外気に連通した空気通路を形成し、該空気通路後端とインキ調整管後端とを連通してなる毛筆状筆記具。」が開示されている。 [3] Conventionally, Patent Document 3 states that “an ink adjusting tube and an ink conduit are concentrically arranged in the front shaft, a relay core is inserted into the ink conduit, and a rear end thereof is inserted into the ink chamber (ink tank). The tip is located at the back end of the brush body with a predetermined gap, and an ink absorber made of a porous material is mounted in the annular path between the ink adjusting tube and the ink conduit and on the back end of the brush body, The tip has a higher density than the other parts, an ink passage is formed at the rear end of the brush, and an air passage communicating with the outside air is formed between the inner surface of the front shaft and the outer surface of the ink adjusting tube. "A brush-like writing instrument in which the end communicates with the rear end of the ink adjusting tube."

前記特許文献３の直液式筆記具は、一本のインキ導管のみによって、インキタンクとインキ吸収体とを接続する構成であるため、初期インキ出し時（即ちインキタンクから吸液材に最初にインキを供給する時）に迅速に空気とインキが交替せず、筆記可能になるまでにかなりの時間を要する。また、前記特許文献３の直液式筆記具は、部品点数が多く、構造が複雑であり、ユーザーに安価に提供することが困難である。   Since the direct liquid type writing instrument of Patent Document 3 is configured to connect the ink tank and the ink absorber by only one ink conduit, at the time of initial ink discharge (that is, the ink is first transferred from the ink tank to the liquid absorbing material). It takes a considerable amount of time before the writing becomes possible because the air and ink do not change rapidly. The direct liquid writing instrument of Patent Document 3 has a large number of parts, a complicated structure, and is difficult to provide to users at low cost.

実公昭４５−１８８９０号公報Japanese Utility Model Publication No. 45-18890 実公昭５６−７５０４号公報Japanese Utility Model Publication No. 56-7504 実公昭６０−７１９１号公報Japanese Utility Model Publication No. 60-7191

本発明は前記従来の問題点を解決するものであって、インキタンク内のインキがペン先側より漏出するおそれがなく、また、ペン先の長手寸法を短くし、ペン先のコストを抑えるとともにペン先からのインキ流出性を円滑にでき、しかも、初期インキ出し時に迅速に空気とインキが交替し、短時間で筆記可能となり、さらに、簡易な構造にできる直液式筆記具を提供しようとするものである。   The present invention solves the above-mentioned conventional problems, and there is no possibility that the ink in the ink tank leaks from the pen tip side, and the length of the pen tip is shortened to reduce the cost of the pen tip. It is intended to provide a direct liquid type writing instrument that can smoothly discharge ink from the nib, and can quickly change the air and ink at the time of initial ink discharge, enables writing in a short time, and has a simple structure. Is.

本発明は、以下の構成を特徴とする。 The present invention is characterized by the following configurations.

（構成１）
ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部に位置されてなることを特徴とする直液式筆記具。 (Configuration 1)
A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being positioned inside the ink occlusion body. A direct liquid writing instrument.

（構成２）
ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部に位置され、前記連通管の各々の前端の軸方向の位置が互いに等しく設定されてなることを特徴とする直液式筆記具。 (Configuration 2)
A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A plurality of the communication pipes, the front ends of the communication pipes are opened, and the front ends of the communication pipes are located inside the ink occlusion body, A direct liquid writing instrument, wherein the axial positions of the front ends of the communicating pipes are set equal to each other.

（構成３）
ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部のペン先後端近傍に位置されてなることを特徴とする直液式筆記具。 (Configuration 3)
A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being a pen tip rear end inside the ink occlusion body A direct liquid writing instrument characterized by being located in the vicinity.

（構成４）
ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部のペン先後端近傍に位置され、前記連通管の各々の前端の軸方向の位置が互いに等しく設定されてなることを特徴とする直液式筆記具。 (Configuration 4)
A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being a pen tip rear end inside the ink occlusion body A direct liquid writing instrument, wherein the direct liquid writing instrument is located in the vicinity, and the axial positions of the front ends of the communicating pipes are set to be equal to each other.

（構成５）
ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端が前記インキ吸蔵体の内部前方に位置し、前記ペン先の後端が前記インキ吸蔵体の内部前方に位置してなることを特徴とする直液式筆記具。 (Configuration 5)
A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being in front of the interior of the ink occlusion body. A direct liquid writing instrument, wherein the pen tip rear end is located in front of the ink occlusion body.

（構成６）
前記ペン先の後端と前記連通管の各々の前端との間は、前記インキ吸蔵体を介してインキ流通可能に接続される構成１乃至５のいずれかに記載の直液式筆記具。 (Configuration 6)
The direct liquid-type writing instrument according to any one of configurations 1 to 5, wherein the rear end of the nib and the front end of each of the communication pipes are connected via the ink occlusion body so that ink can be circulated.

（構成７）
前記連通管の各々の前端をインキ吸蔵体の後端から前方に挿入し、インキ吸蔵体の内部を前方に押圧圧縮することによって、前記連通管の各々の前端近傍のインキ吸蔵体の密度を、前記連通管の各々の前端近傍以外の部分のインキ吸蔵体の密度よりも高く設定した構成１乃至６のいずれかに記載の直液式筆記具。 (Configuration 7)
By inserting the front end of each of the communication pipes forward from the rear end of the ink storage body and pressing and compressing the inside of the ink storage body forward, the density of the ink storage bodies near the front end of each of the communication pipes is reduced. The direct liquid writing instrument according to any one of configurations 1 to 6, wherein the density is set higher than the density of the ink occlusion body in a portion other than the vicinity of the front end of each of the communication pipes.

（構成８）
前記連通管の各々の前端近傍以外のインキ吸蔵体の空隙率が７０％〜９５％であり、前記連通管の各々の前端近傍以外のインキ吸蔵体の空隙率と、前記連通管の各々の前端近傍のインキ吸蔵体の空隙率との差が７％以上である構成７記載の直液式筆記具。 (Configuration 8)
The porosity of the ink occlusion body other than the vicinity of the front end of each of the communication pipes is 70% to 95%, the porosity of the ink occlusion body other than the vicinity of the front end of each of the communication pipes, and the front end of each of the communication pipes 8. The direct liquid writing instrument according to configuration 7, wherein a difference from the porosity of the ink storage body in the vicinity is 7% or more.

（構成９）
前記連通管の各々の前端を先鋭形状とした構成７記載の直液式筆記具。 (Configuration 9)
8. The direct liquid writing instrument according to Configuration 7, wherein the front end of each of the communication pipes has a sharp shape.

（構成１０）
前記連通管の各々の前端がその前端開口部を含む傾斜カット面からなる構成９記載の直液式筆記具。 (Configuration 10)
10. The direct liquid writing instrument according to Configuration 9, wherein each front end of the communication pipe is formed of an inclined cut surface including a front end opening.

（構成１１）
前記インキ吸蔵体の前端から前記連通管の各々の前端までの軸方向の距離が、前記インキ吸蔵体全体の軸方向の長さの３％以上５０％以下に設定される構成１乃至１０のいずれかに記載の直液式筆記具。 (Configuration 11)
Any of the configurations 1 to 10 wherein the axial distance from the front end of the ink storage body to the front end of each of the communication pipes is set to 3% or more and 50% or less of the axial length of the entire ink storage body The direct liquid writing instrument described in Crab.

（構成１２）
前記インキ吸蔵体の前端から前記連通管の各々の前端までの軸方向の距離が等しく設定される構成１乃至１１のいずれかに記載の直液式筆記具。 (Configuration 12)
The direct liquid writing instrument according to any one of configurations 1 to 11, wherein an axial distance from a front end of the ink occluding body to a front end of each of the communication pipes is set equal.

（構成１３）
前記連通管の各々の前端と前記ペン先の後端との軸方向の距離が１０ｍｍ以内に設定される構成１乃至１２のいずれかに記載の直液式筆記具。 (Configuration 13)
The direct liquid writing instrument according to any one of configurations 1 to 12, wherein an axial distance between a front end of each of the communication pipes and a rear end of the pen tip is set within 10 mm.

（構成１４）
前記連通管の各々の前端と前記ペン先の後端との間の間隔が等しく設定される構成１乃至１３のいずれかに記載の直液式筆記具。 (Configuration 14)
14. The direct liquid writing instrument according to any one of configurations 1 to 13, wherein an interval between each front end of the communication pipe and a rear end of the pen tip is set to be equal.

（構成１５）
前記インキ吸蔵体の前端面及び後端面が外気と連通される構成１乃至１４のいずれかに記載の直液式筆記具。 (Configuration 15)
The direct liquid writing instrument according to any one of configurations 1 to 14, wherein a front end surface and a rear end surface of the ink occlusion body are communicated with outside air.

（構成１６）
前記連通管の各々の内部に、毛細間隙を備えたインキ吸収体を配置した構成１乃至１５のいずれかに記載の直液式筆記具。 (Configuration 16)
The direct liquid writing instrument according to any one of configurations 1 to 15, wherein an ink absorber having a capillary gap is disposed inside each of the communication tubes.

（構成１７）
前記連通管の各々の側壁を互いに連結した構成１乃至１６のいずれかに記載の直液式筆記具。 (Configuration 17)
The direct liquid writing instrument according to any one of configurations 1 to 16, wherein the side walls of the communication pipe are connected to each other.

請求項１の直液式筆記具によれば、インキタンク内のインキがペン先側より漏出するおそれがなく、しかも、初期インキ出し時に迅速に空気とインキが交替し、短時間で筆記可能となり、さらに、簡易な構造にできる。   According to the direct liquid writing instrument of claim 1, the ink in the ink tank is not likely to leak out from the pen tip side, and the air and the ink are quickly replaced at the time of initial ink discharge, and writing can be performed in a short time. Furthermore, a simple structure can be achieved.

請求項２の直液式筆記具によれば、インキタンク内のインキがペン先側より漏出するおそれがなく、しかも、初期インキ出し時に迅速に空気とインキが交替し、短時間で筆記可能となり、さらに、簡易な構造にできる。   According to the direct liquid writing instrument of claim 2, the ink in the ink tank is not likely to leak from the pen tip side, and the air and the ink are quickly replaced at the time of initial ink discharge, and writing can be performed in a short time. Furthermore, a simple structure can be achieved.

請求項３の直液式筆記具によれば、インキタンク内のインキがペン先側より漏出するおそれがなく、しかも、初期インキ出し時に迅速に空気とインキが交替し且つ何れの連通管の前端開口部からでもペン先の後端に迅速にインキが供給され、確実に、短時間で筆記可能となり、さらに、簡易な構造にできる。   According to the direct liquid type writing instrument of claim 3, there is no possibility that the ink in the ink tank leaks from the pen tip side, and the air and the ink are rapidly replaced at the time of initial ink discharge, and the front end opening of any communication pipe Ink is quickly supplied to the rear end of the pen tip from the part, so that writing can be performed reliably in a short time, and a simple structure can be achieved.

請求項４の直液式筆記具によれば、インキタンク内のインキがペン先側より漏出するおそれがなく、しかも、初期インキ出し時に迅速に空気とインキが交替し且つ何れの連通管の前端開口部からでもペン先の後端に迅速にインキが供給され、確実に、短時間で筆記可能となり、さらに、簡易な構造にできる。   According to the direct liquid type writing instrument of claim 4, there is no possibility that the ink in the ink tank leaks out from the pen tip side, and the air and the ink are rapidly replaced at the time of initial ink discharge, and the front end opening of any communication pipe Ink is quickly supplied to the rear end of the pen tip from the part, so that writing can be performed reliably in a short time, and a simple structure can be achieved.

請求項５の直液式筆記具によれば、インキタンク内のインキがペン先側より漏出するおそれがなく、また、ペン先の長手寸法を短くし、ペン先のコストを抑えるとともにペン先からのインキ流出性を円滑にでき、しかも、初期インキ出し時に迅速に空気とインキが交替し、短時間で筆記可能となり、さらに、簡易な構造にできる。   According to the direct liquid type writing instrument of claim 5, there is no possibility that the ink in the ink tank leaks from the pen tip side, and the length of the pen tip is shortened, the cost of the pen tip is reduced, and the pen tip Ink flowability can be made smooth, and air and ink can be changed quickly at the time of initial ink discharge, writing can be performed in a short time, and a simple structure can be achieved.

請求項６の直液式筆記具によれば、ペン先上向き状態や筆記具本体の水平状態などのインキタンクからのインキ供給が無い場合であっても、インキ吸蔵体の内部に含浸されたインキによって十分に筆記可能となる。   According to the direct liquid type writing instrument of claim 6, the ink impregnated inside the ink occlusion body is sufficient even when there is no ink supply from the ink tank such as the pen tip upward state or the horizontal state of the writing instrument body. It becomes possible to write on.

請求項７の直液式筆記具によれば、連通管の各々の前端開口部を含浸インキによって、確実に液シールでき、しかも、連通管をインキ吸蔵体に組み込む前に、予めインキ吸蔵体に密度差を設ける必要がなく、製造が極めて容易となる。   According to the straight liquid type writing instrument of claim 7, each front end opening of the communication pipe can be reliably liquid-sealed with impregnated ink, and before the communication pipe is installed in the ink storage body, the density is previously stored in the ink storage body. There is no need to provide a difference, and manufacturing becomes extremely easy.

請求項８の直液式筆記具によれば、連通管の各々の前端開口部を含浸インキによって、一層、確実に液シールできる。   According to the direct liquid type writing instrument of the eighth aspect, the front end opening of each of the communication pipes can be more reliably liquid sealed with the impregnating ink.

請求項９の直液式筆記具によれば、各々の連通管をインキ吸蔵体の後端からスムーズに突き刺し挿入することができ、組立が容易となる。   According to the direct liquid type writing instrument of the ninth aspect, each communication pipe can be smoothly inserted and inserted from the rear end of the ink occlusion body, and assembly is facilitated.

請求項１０の直液式筆記具によれば、各々の連通管のインキ吸蔵体への突き刺し挿入性が、より一層、スムーズになるとともに、各々の連通管の前端開口部の開口面積が増加し、インキ吸蔵体の内部へのインキの供給を迅速にできる。   According to the direct liquid writing instrument of claim 10, the insertion and insertion of each communicating tube into the ink occlusion body becomes even smoother, and the opening area of the front end opening of each communicating tube increases. The ink can be quickly supplied to the inside of the ink occlusion body.

請求項１１の直液式筆記具によれば、インキタンクの内圧上昇時にインキ吸蔵体の前端よりインキが漏出することがなく、しかも、筆跡途切れや筆跡カスレのない、ペン先先端からの十分なインキ流出性が得られる。   According to the direct liquid writing instrument of claim 11, ink does not leak from the front end of the ink occlusion body when the internal pressure of the ink tank increases, and there is sufficient ink from the tip of the pen tip without any handwriting breakage or handwriting blurring. Runoff is obtained.

請求項１２の直液式筆記具によれば、連通管の各々の前端開口部の液シール性が向上し、外部へのインキ漏出を、より一層防止できる。   According to the direct liquid writing instrument of the twelfth aspect, the liquid sealability of each front end opening of the communication pipe is improved, and ink leakage to the outside can be further prevented.

請求項１３の直液式筆記具によれば、初期インキ出し時、連通管の各々の前端からペン先の後端にインキが迅速に供給され、短時間で筆記可能となる。   According to the direct liquid writing instrument of the thirteenth aspect, at the time of initial ink ejection, ink is rapidly supplied from the front end of each of the communicating pipes to the rear end of the pen tip, and writing can be performed in a short time.

請求項１４の直液式筆記具によれば、初期インキ出し時、インキタンクからのインキが、複数本の連通管の中で、いずれの連通管の前端開口部からペン先の後端に供給された場合でも、ばらつき無く、一定時間で筆記可能となる。   According to the direct liquid writing instrument of claim 14, at the time of initial ink discharge, ink from the ink tank is supplied to the rear end of the pen tip from the front end opening of any of the communication pipes. Even in the case of writing, it is possible to write in a certain time without variation.

請求項１５の直液式筆記具によれば、インキ吸蔵体の内部の連通管の前端開口部から供給されたインキを、前記インキ吸蔵体の内部の連通管の前端近傍から、インキ吸蔵体の前端方向、及び連通管の前端近傍のインキ吸蔵体の内部からインキ吸蔵体の後端方向へスムーズに移動させることができる。   According to the direct liquid type writing instrument of claim 15, the ink supplied from the front end opening of the communication pipe inside the ink occlusion body is passed from the vicinity of the front end of the communication pipe inside the ink occlusion body to the front end of the ink occlusion body. The direction and the inside of the ink occlusion body in the vicinity of the front end of the communication pipe can be smoothly moved in the direction of the rear end of the ink occlusion body.

請求項１６の直液式筆記具によれば、各々の連通管の外径および内径を比較的大きく設定した場合でも、連通管の前端開口部の適正な液シールが得られる。   According to the direct liquid writing instrument of the sixteenth aspect, even when the outer diameter and inner diameter of each communication pipe are set to be relatively large, an appropriate liquid seal can be obtained at the front end opening of the communication pipe.

請求項１７の直液式筆記具によれば、各々の連通管の折れ曲がりを抑えることができる。   According to the direct liquid type writing instrument of the seventeenth aspect, bending of each communicating pipe can be suppressed.

本発明を実施するための最良の形態を説明する。   The best mode for carrying out the present invention will be described.

〔１〕本発明の第１の実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され且つインキを直に貯溜するインキタンク７と、前記インキタンク７と前記インキ吸蔵体３との間を接続する連通管６とからなる直液式筆記具であって、前記連通管６を複数備え、前記連通管６の各々の前端が開口され、前記連通管６の各々の前端がインキ吸蔵体３内部に位置されてなること（構成１）を特徴とする。 [1] The direct liquid writing instrument 1 according to the first embodiment of the present invention includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, and a rear side of the ink occlusion body 3. A direct liquid type writing instrument comprising an ink tank 7 that is arranged and directly stores ink, and a communication pipe 6 that connects the ink tank 7 and the ink occlusion body 3, wherein a plurality of the communication pipes 6 are provided. A front end of each of the communication pipes 6 is opened, and a front end of each of the communication pipes 6 is positioned inside the ink storage member 3 (Configuration 1).

前記直液式筆記具１（構成１）の連通管６は、その各々が、インキタンク７内のインキ８をインキ吸蔵体３の内部に供給する機能と、外気をインキタンク７内に供給する機能とを備える。インキタンク７内のインキ８をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク７内のインキ８が、少なくとも一つの連通管６を通って、インキ吸蔵体３に供給され、インキ吸蔵体３内部において含浸される。それと同時に、外気が他の連通管６を通ってインキタンク７内に取り込まれる。即ち、ｎ本の連通管６の場合（ｎは２以上の整数）、１本以上かつ（ｎ−１）本以下の連通管６がインキ供給を行い、他の残りの連通管６が外気の供給を行う。   Each of the communication pipes 6 of the direct liquid writing instrument 1 (Configuration 1) has a function of supplying the ink 8 in the ink tank 7 to the inside of the ink occlusion body 3 and a function of supplying outside air to the ink tank 7. With. When supplying the ink 8 in the ink tank 7 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 8 in the ink tank 7 passes through at least one communication pipe 6 due to gravity and passes through the ink occlusion body. 3 and impregnated inside the ink occlusion body 3. At the same time, the outside air is taken into the ink tank 7 through the other communication pipe 6. That is, in the case of n communication pipes 6 (n is an integer of 2 or more), one or more and (n-1) or less communication pipes 6 supply ink, and the other remaining communication pipes 6 are outside air. Supply.

前記インキ吸蔵体３の内部に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管６の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク７内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管６によるインキタンク７からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管６の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク７からのインキ流出とインキタンク７への空気流入（即ちインキと空気の交替）が停止状態となる。   When the ink impregnated inside the ink occlusion body 3 reaches a certain amount, the front end opening of the other communication pipe 6 that has taken in the outside air is in a liquid-sealed state with the impregnating ink and temporarily closed. The supply of outside air into the tank 7 is stopped. At the same time, the ink supply from the ink tank 7 to the ink occluding body 3 by the communication pipe 6 that has been supplying the ink is also stopped. As a result, the front end opening of each of the communication pipes 6 is in a liquid-sealed state temporarily. The ink tank 7 is closed, and the ink outflow from the ink tank 7 and the air inflow into the ink tank 7 (that is, replacement of ink and air) are stopped.

前記直液式筆記具１（構成１）は、前記連通管６の各々の前端がインキ吸蔵体３内部に位置する構成であるため、連通管６の各々の前端開口部の全てを、インキ吸蔵体３の内部に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク７からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。 The direct liquid writing instrument 1 (Configuration 1) has a configuration in which the front end of each of the communication pipes 6 is positioned inside the ink storage body 3, so that all of the front end openings of the communication pipes 6 are disposed in the ink storage body. 3 can be easily closed by a liquid seal of ink impregnated in the interior of 3. As a result, excess ink is not supplied from the ink tank 7 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.

また、前記直液式筆記具１（構成１）は、連通管６を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管６がインキ供給を行う場合、他の連通管６が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。   Further, the direct liquid writing instrument 1 (Configuration 1) has a plurality of communication pipes 6 (that is, two or more), and when at least one of the communication pipes 6 supplies ink, the other communication pipes 6 Air supply will be performed. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.

〔２〕本発明の第２の実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され且つインキを直に貯溜するインキタンク７と、前記インキタンク７と前記インキ吸蔵体３との間を接続する連通管６とからなる直液式筆記具であって、前記連通管６を複数備え、前記連通管６の各々の前端が開口され、前記連通管６の各々の前端がインキ吸蔵体３内部に位置され、前記連通管６の各々の前端の軸方向の位置が互いに等しく設定されてなること（構成２）を要件とする。 [2] A direct liquid writing instrument 1 according to a second embodiment of the present invention includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, and a rear side of the ink occlusion body 3. A direct liquid type writing instrument comprising an ink tank 7 that is arranged and directly stores ink, and a communication pipe 6 that connects the ink tank 7 and the ink occlusion body 3, wherein a plurality of the communication pipes 6 are provided. A front end of each of the communication pipes 6 is opened, a front end of each of the communication pipes 6 is positioned inside the ink storage body 3, and axial positions of the front ends of the communication pipes 6 are set to be equal to each other. (Configuration 2) is a requirement.

前記直液式筆記具１（構成２）の連通管６は、その各々が、インキタンク７内のインキ８をインキ吸蔵体３の内部に供給する機能と、外気をインキタンク７内に供給する機能とを備える。インキタンク７内のインキ８をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク７内のインキ８が、少なくとも一つの連通管６を通って、インキ吸蔵体３に供給され、インキ吸蔵体３内部において含浸される。それと同時に、外気が他の連通管６を通ってインキタンク７内に取り込まれる。即ち、ｎ本の連通管６の場合（ｎは２以上の整数）、１本以上かつ（ｎ−１）本以下の連通管６がインキ供給を行い、他の残りの連通管６が外気の供給を行う。   Each of the communication pipes 6 of the direct liquid writing instrument 1 (Configuration 2) has a function of supplying the ink 8 in the ink tank 7 to the inside of the ink occlusion body 3 and a function of supplying outside air to the ink tank 7. With. When supplying the ink 8 in the ink tank 7 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 8 in the ink tank 7 passes through at least one communication pipe 6 due to gravity and passes through the ink occlusion body. 3 and impregnated inside the ink occlusion body 3. At the same time, the outside air is taken into the ink tank 7 through the other communication pipe 6. That is, in the case of n communication pipes 6 (n is an integer of 2 or more), one or more and (n-1) or less communication pipes 6 supply ink, and the other remaining communication pipes 6 are outside air. Supply.

前記インキ吸蔵体３の内部に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管６の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク７内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管６によるインキタンク７からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管６の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク７からのインキ流出とインキタンク７への空気流入（即ちインキと空気の交替）が停止状態となる。   When the ink impregnated inside the ink occlusion body 3 reaches a certain amount, the front end opening of the other communication pipe 6 that has taken in the outside air is in a liquid-sealed state with the impregnating ink and temporarily closed. The supply of outside air into the tank 7 is stopped. At the same time, the ink supply from the ink tank 7 to the ink occluding body 3 by the communication pipe 6 that has been supplying the ink is also stopped. As a result, the front end opening of each of the communication pipes 6 is in a liquid-sealed state temporarily. The ink tank 7 is closed, and the ink outflow from the ink tank 7 and the air inflow into the ink tank 7 (that is, replacement of ink and air) are stopped.

前記直液式筆記具１（構成２）は、前記連通管６の各々の前端がインキ吸蔵体３内部に位置する構成であるため、連通管６の各々の前端開口部の全てを、インキ吸蔵体３の内部に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク７からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。 The direct liquid writing instrument 1 (configuration 2) is configured such that the front end of each of the communication pipes 6 is positioned inside the ink storage body 3, so that all of the front end openings of the communication pipes 6 are disposed in the ink storage body. 3 can be easily closed by a liquid seal of ink impregnated in the interior of 3. As a result, excess ink is not supplied from the ink tank 7 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.

また、前記直液式筆記具（構成２）は、前記連通管６の各々の前端の軸方向の位置が互いに等しく設定される構成（即ち連通管６の各々の前端が互いに前後に離れていない構成）であるため、インキ吸蔵体３の内部における連通管６の各々の前端の相互間の距離が一層短くなり、連通管６の各々の前端開口部の液シール性が向上し、外部へのインキ漏出を、より一層防止できる。 The direct liquid writing instrument (Configuration 2) has a configuration in which the axial positions of the front ends of the communication pipes 6 are set to be equal to each other (that is, the front ends of the communication pipes 6 are not separated from each other in the front-rear direction). Therefore, the distance between the front ends of the communication pipes 6 inside the ink occlusion body 3 is further shortened, the liquid sealability of the front end openings of the communication pipes 6 is improved, and the ink to the outside Leakage can be further prevented.

また、前記直液式筆記具１（構成２）は、連通管６を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管６がインキ供給を行う場合、他の連通管６が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。   The direct liquid writing instrument 1 (configuration 2) includes a plurality of communication pipes 6 (that is, two or more), and when at least one of the communication pipes 6 supplies ink, the other communication pipes 6 Air supply will be performed. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.

〔３〕本発明の第３の実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され且つインキを直に貯溜するインキタンク７と、前記インキタンク７と前記インキ吸蔵体３との間を接続する連通管６とからなる直液式筆記具であって、前記連通管６を複数備え、前記連通管６の各々の前端が開口され、前記連通管６の各々の前端がインキ吸蔵体３内部のペン先２後端近傍に位置されてなること（構成３）を要件とする。 [3] A direct liquid writing instrument 1 according to a third embodiment of the present invention includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, and a rear side of the ink occlusion body 3. A direct liquid type writing instrument comprising an ink tank 7 that is arranged and directly stores ink, and a communication pipe 6 that connects the ink tank 7 and the ink occlusion body 3, wherein a plurality of the communication pipes 6 are provided. And the front end of each of the communication pipes 6 is opened, and the front end of each of the communication pipes 6 is positioned in the vicinity of the rear end of the pen tip 2 inside the ink storage body 3 (Configuration 3).

前記直液式筆記具１（構成３）の連通管６は、その各々が、インキタンク７内のインキ８をインキ吸蔵体３の内部に供給する機能と、外気をインキタンク７内に供給する機能とを備える。インキタンク７内のインキ８をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク７内のインキ８が、少なくとも一つの連通管６を通って、インキ吸蔵体３に供給され、インキ吸蔵体３内部において含浸される。それと同時に、外気が他の連通管６を通ってインキタンク７内に取り込まれる。即ち、ｎ本の連通管６の場合（ｎは２以上の整数）、１本以上かつ（ｎ−１）本以下の連通管６がインキ供給を行い、他の残りの連通管６が外気の供給を行う。   Each of the communicating pipes 6 of the direct liquid writing instrument 1 (Configuration 3) has a function of supplying the ink 8 in the ink tank 7 to the inside of the ink occlusion body 3 and a function of supplying outside air to the ink tank 7. With. When supplying the ink 8 in the ink tank 7 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 8 in the ink tank 7 passes through at least one communication pipe 6 due to gravity and passes through the ink occlusion body. 3 and impregnated inside the ink occlusion body 3. At the same time, the outside air is taken into the ink tank 7 through the other communication pipe 6. That is, in the case of n communication pipes 6 (n is an integer of 2 or more), one or more and (n-1) or less communication pipes 6 supply ink, and the other remaining communication pipes 6 are outside air. Supply.

前記インキ吸蔵体３の内部に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管６の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク７内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管６によるインキタンク７からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管６の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク７からのインキ流出とインキタンク７への空気流入（即ちインキと空気の交替）が停止状態となる。   When the ink impregnated inside the ink occlusion body 3 reaches a certain amount, the front end opening of the other communication pipe 6 that has taken in the outside air is in a liquid-sealed state with the impregnating ink and temporarily closed. The supply of outside air into the tank 7 is stopped. At the same time, the ink supply from the ink tank 7 to the ink occluding body 3 by the communication pipe 6 that has been supplying the ink is also stopped. As a result, the front end opening of each of the communication pipes 6 is in a liquid-sealed state temporarily. The ink tank 7 is closed, and the ink outflow from the ink tank 7 and the air inflow into the ink tank 7 (that is, replacement of ink and air) are stopped.

前記直液式筆記具１（構成３）は、前記連通管６の各々の前端がインキ吸蔵体３内部に位置する構成であるため、連通管６の各々の前端開口部の全てを、インキ吸蔵体３の内部に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク７からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。   The direct liquid writing instrument 1 (Configuration 3) has a configuration in which the front ends of the communication pipes 6 are positioned inside the ink storage body 3, and therefore the front end openings of the communication pipes 6 are all disposed in the ink storage body. 3 can be easily closed by a liquid seal of ink impregnated in the interior of 3. As a result, excess ink is not supplied from the ink tank 7 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.

また、前記直液式筆記具１（構成３）は、連通管６を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管６がインキ供給を行う場合、他の連通管６が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。   The direct liquid writing instrument 1 (configuration 3) includes a plurality of communication pipes 6 (that is, two or more), and when at least one of the communication pipes 6 supplies ink, the other communication pipes 6 Air supply will be performed. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.

さらに、前記直液式筆記具１（構成３）は、連通管６の各々の前端がペン先２後端近傍に位置する構成によって、いずれの連通管６の前端開口部からインキが供給されても、ペン先２にインキを迅速に供給できる。それにより、初期インキ出し時、確実に、短時間で筆記可能となる。   Further, the direct liquid writing instrument 1 (Configuration 3) has a configuration in which each front end of the communication pipe 6 is positioned in the vicinity of the rear end of the pen tip 2 so that ink can be supplied from the front end opening of any communication pipe 6. Ink can be quickly supplied to the nib 2. As a result, writing can be performed reliably in a short time when the initial ink is dispensed.

〔４〕本発明の第４の実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され且つインキを直に貯溜するインキタンク７と、前記インキタンク７と前記インキ吸蔵体３との間を接続する連通管６とからなる直液式筆記具であって、前記連通管６を複数備え、前記連通管６の各々の前端が開口され、前記連通管６の各々の前端がインキ吸蔵体３内部のペン先２後端近傍に位置され、前記連通管６の各々の前端の軸方向の位置が互いに等しく設定されてなること（構成４）を要件とする。 [4] A direct liquid writing instrument 1 according to a fourth embodiment of the present invention includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, and a rear side of the ink occlusion body 3. A direct liquid type writing instrument comprising an ink tank 7 that is arranged and directly stores ink, and a communication pipe 6 that connects the ink tank 7 and the ink occlusion body 3, wherein a plurality of the communication pipes 6 are provided. A front end of each of the communication pipes 6 is opened, and a front end of each of the communication pipes 6 is positioned in the vicinity of the rear end of the pen tip 2 inside the ink storage body 3, and an axial direction of each front end of the communication pipe 6 Are required to be set equal to each other (Configuration 4).

前記直液式筆記具１（構成４）の連通管６は、その各々が、インキタンク７内のインキ８をインキ吸蔵体３の内部に供給する機能と、外気をインキタンク７内に供給する機能とを備える。インキタンク７内のインキ８をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク７内のインキ８が、少なくとも一つの連通管６を通って、インキ吸蔵体３に供給され、インキ吸蔵体３内部において含浸される。それと同時に、外気が他の連通管６を通ってインキタンク７内に取り込まれる。即ち、ｎ本の連通管６の場合（ｎは２以上の整数）、１本以上かつ（ｎ−１）本以下の連通管６がインキ供給を行い、他の残りの連通管６が外気の供給を行う。   Each of the communication pipes 6 of the direct liquid writing instrument 1 (configuration 4) has a function of supplying the ink 8 in the ink tank 7 to the inside of the ink occlusion body 3 and a function of supplying outside air to the ink tank 7. With. When supplying the ink 8 in the ink tank 7 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 8 in the ink tank 7 passes through at least one communication pipe 6 due to gravity and passes through the ink occlusion body. 3 and impregnated inside the ink occlusion body 3. At the same time, the outside air is taken into the ink tank 7 through the other communication pipe 6. That is, in the case of n communication pipes 6 (n is an integer of 2 or more), one or more and (n-1) or less communication pipes 6 supply ink, and the other remaining communication pipes 6 are outside air. Supply.

前記インキ吸蔵体３の内部に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管６の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク７内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管６によるインキタンク７からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管６の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク７からのインキ流出とインキタンク７への空気流入（即ちインキと空気の交替）が停止状態となる。   When the ink impregnated inside the ink occlusion body 3 reaches a certain amount, the front end opening of the other communication pipe 6 that has taken in the outside air is in a liquid-sealed state with the impregnating ink and temporarily closed. The supply of outside air into the tank 7 is stopped. At the same time, the ink supply from the ink tank 7 to the ink occluding body 3 by the communication pipe 6 that has been supplying the ink is also stopped. As a result, the front end opening of each of the communication pipes 6 is in a liquid-sealed state temporarily. The ink tank 7 is closed, and the ink outflow from the ink tank 7 and the air inflow into the ink tank 7 (that is, replacement of ink and air) are stopped.

前記直液式筆記具１（構成４）は、連通管６の各々の前端がインキ吸蔵体３内部に位置する構成であるため、連通管６の各々の前端開口部の全てを、インキ吸蔵体３の内部に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク７からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。 The direct liquid writing instrument 1 (configuration 4) has a configuration in which the front ends of the communication pipes 6 are positioned inside the ink storage body 3, so that all of the front end openings of the communication pipes 6 are disposed in the ink storage body 3. It can be easily closed by a liquid seal of ink impregnated inside. As a result, excess ink is not supplied from the ink tank 7 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.

また、前記直液式筆記具１（構成４）は、前記連通管６の各々の前端の軸方向の位置が互いに等しく設定される構成（即ち連通管６の各々の前端が互いに前後に離れていない構成）であるため、インキ吸蔵体３の内部における連通管６の各々の前端の相互間の距離が一層短くなり、連通管６の各々の前端開口部の液シール性が向上し、外部へのインキ漏出を、より一層防止できる。 The direct liquid writing instrument 1 (configuration 4) has a configuration in which the axial positions of the front ends of the communication pipes 6 are set to be equal to each other (that is, the front ends of the communication pipes 6 are not separated from each other in the front-rear direction). Therefore, the distance between the front ends of the communication pipes 6 inside the ink occlusion body 3 is further shortened, and the liquid sealability of the front end openings of the communication pipes 6 is improved. Ink leakage can be further prevented.

また、前記直液式筆記具１（構成４）は、連通管６を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管６がインキ供給を行う場合、他の連通管６が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。   The direct liquid writing instrument 1 (configuration 4) includes a plurality of communication pipes 6 (that is, two or more), so that when at least one of the communication pipes 6 supplies ink, the other communication pipes 6 Air supply will be performed. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.

さらに、前記直液式筆記具１（構成４）は、連通管６の各々の前端がペン先２後端近傍に位置されてなる構成によって、いずれの連通管６の前端開口部からインキが供給されても、ペン先２にインキを迅速に供給できる。それにより、初期インキ出し時、確実に、短時間で筆記可能となる。   Further, in the direct liquid writing instrument 1 (configuration 4), ink is supplied from the front end opening portion of any communication pipe 6 by the configuration in which the front ends of the communication pipes 6 are positioned in the vicinity of the rear end of the pen tip 2. However, the ink can be quickly supplied to the nib 2. As a result, writing can be performed reliably in a short time when the initial ink is dispensed.

〔５〕本発明の第５の実施の形態の直液式筆記具１は、ペン先２と、前記ペン先２の後端に接続されるインキ吸蔵体３と、前記インキ吸蔵体３の後方に配置され且つインキを直に貯溜するインキタンク７と、前記インキタンク７と前記インキ吸蔵体３との間を接続する連通管６とからなる直液式筆記具であって、前記連通管６を複数備え、前記連通管６の各々の前端が開口され、前記連通管６の各々の前端が前記インキ吸蔵体３の内部前方に位置し、前記ペン先の後端が前記インキ吸蔵体３の内部前方に位置してなること（構成５）を要件とする。 [5] The direct liquid writing instrument 1 according to the fifth embodiment of the present invention includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, and a rear side of the ink occlusion body 3. A direct liquid type writing instrument comprising an ink tank 7 that is arranged and directly stores ink, and a communication pipe 6 that connects the ink tank 7 and the ink occlusion body 3, wherein a plurality of the communication pipes 6 are provided. A front end of each of the communication pipes 6 is opened, a front end of each of the communication pipes 6 is positioned in front of the ink storage body 3, and a rear end of the pen tip is in front of the ink storage body 3. (Configuration 5) is a requirement.

前記直液式筆記具１（構成５）の連通管６は、その各々が、インキタンク７内のインキ８をインキ吸蔵体３の内部前方に供給する機能と、外気をインキタンク７内に供給する機能とを備える。インキタンク７内のインキ８をインキ吸蔵体３に供給する際、ペン先２を下向き状態にすると、重力によりインキタンク７内のインキ８が、少なくとも一つの連通管６を通って、インキ吸蔵体３の内部前方に供給され、インキ吸蔵体３の内部前方において含浸される。それと同時に、外気が他の連通管６を通ってインキタンク７内に取り込まれる。即ち、ｎ本の連通管６の場合（ｎは２以上の整数）、１本以上かつ（ｎ−１）本以下の連通管６がインキ供給を行い、他の残りの連通管６が外気の供給を行う。   Each of the communication pipes 6 of the direct liquid writing instrument 1 (configuration 5) supplies the ink 8 in the ink tank 7 to the front inside the ink storage body 3 and supplies outside air into the ink tank 7. With functionality. When supplying the ink 8 in the ink tank 7 to the ink occlusion body 3, if the pen tip 2 is turned downward, the ink 8 in the ink tank 7 passes through at least one communication pipe 6 due to gravity and passes through the ink occlusion body. 3 is supplied to the front of the interior 3 and impregnated in the front of the interior of the ink storage body 3. At the same time, the outside air is taken into the ink tank 7 through the other communication pipe 6. That is, in the case of n communication pipes 6 (n is an integer of 2 or more), one or more and (n-1) or less communication pipes 6 supply ink, and the other remaining communication pipes 6 are outside air. Supply.

前記インキ吸蔵体３の内部前方に含浸されたインキが一定量になると、前記外気を取り込んでいた他の連通管６の前端開口部が、前記含浸インキによる液シール状態となり一時的に閉鎖され、インキタンク７内への外気の供給は停止される。それと同時に、前記インキ供給を行っていた連通管６によるインキタンク７からインキ吸蔵体３へのインキ供給も停止され、その結果、連通管６の各々の前端開口部が液シール状態となり一時的に閉鎖され、インキタンク７からのインキ流出とインキタンク７への空気流入（即ちインキと空気の交替）が停止状態となる。   When the amount of ink impregnated in the front of the inside of the ink occlusion body 3 becomes a certain amount, the front end opening of the other communication pipe 6 that has taken in the outside air is liquid-sealed by the impregnation ink and temporarily closed, The supply of outside air into the ink tank 7 is stopped. At the same time, the ink supply from the ink tank 7 to the ink occluding body 3 by the communication pipe 6 that has been supplying the ink is also stopped. As a result, the front end opening of each of the communication pipes 6 is in a liquid-sealed state temporarily. The ink tank 7 is closed, and the ink outflow from the ink tank 7 and the air inflow into the ink tank 7 (that is, replacement of ink and air) are stopped.

前記直液式筆記具１（構成５）は、前記連通管６の各々の前端の全てが、インキ吸蔵体３の内部前方に位置する構成であるため、連通管６の各々の前端開口部の全てを、インキ吸蔵体３の内部前方に含浸されたインキの液シールによって容易に閉鎖することができる。その結果、インキタンク７からインキ吸蔵体３に過剰のインキを供給することがなく、ペン先２側より外部にインキが漏出するおそれがない。   In the direct liquid writing instrument 1 (configuration 5), since all of the front ends of the communication pipes 6 are located in front of the interior of the ink storage body 3, all of the front end openings of the communication pipes 6 are used. Can be easily closed by a liquid seal of ink impregnated in the front of the ink storage body 3. As a result, excess ink is not supplied from the ink tank 7 to the ink occlusion body 3, and there is no possibility that the ink leaks outside from the pen tip 2 side.

また、前記直液式筆記具１（構成５）は、ペン先２の後端がインキ吸蔵体３の内部前方に位置しているため、ペン先２全体の長手寸法を短く設定できる。その結果、インキタンク７からの潤沢なインキが、連通管６を通ってインキ吸蔵体３の内部前方を介してペン先２後端に供給された後、前記ペン先２先端に迅速に供給されるため、筆跡途切れや筆跡カスレのない、ペン先２からの円滑なインキ流出性が得られる。また、ペン先２全体の長手寸法を短く設定できることから、ペン先２のコストを安価に抑えることもできる。   Moreover, since the rear end of the nib 2 is located in front of the ink occlusion body 3 in the direct liquid writing instrument 1 (Configuration 5), the longitudinal dimension of the entire nib 2 can be set short. As a result, abundant ink from the ink tank 7 is supplied to the rear end of the pen tip 2 through the communication pipe 6 and through the front inside of the ink occlusion body 3 and then rapidly supplied to the front end of the pen tip 2. Therefore, smooth ink outflow from the nib 2 without handwriting breakage or handwriting blur is obtained. Moreover, since the longitudinal dimension of the entire nib 2 can be set short, the cost of the nib 2 can be reduced at a low cost.

また、前記直液式筆記具１（構成５）は、連通管６を複数本（即ち２本以上）、有することにより、少なくとも一つの連通管６がインキ供給を行う場合、他の連通管６が空気供給を行うことになる。そのため、初期インキ出し時（即ち、インキが含浸されていないインキ吸蔵体３に最初にインキを供給する場合）に迅速にインキと空気との交替が行われ、短時間で筆記可能となる。   Further, the direct liquid writing instrument 1 (configuration 5) has a plurality of communication pipes 6 (that is, two or more), so that when at least one of the communication pipes 6 supplies ink, the other communication pipes 6 Air supply will be performed. Therefore, at the time of initial ink ejection (that is, when ink is first supplied to the ink occlusion body 3 not impregnated with ink), the ink and air are quickly replaced, and writing can be performed in a short time.

また、前記直液式筆記具１（構成５）は、温度上昇等によりインキタンク７内の圧力が上昇した際、インキタンク７内より押し出された余剰のインキは、前記連通管６を通ってインキ吸蔵体３の内部前方に供給され、さらに、インキ吸蔵体３の内部後方に供給され一時的に含浸される。一方、温度低下等によりインキタンク７内の圧力が減少した際、インキ吸蔵体３の内部後方に含浸されたインキが、インキ吸蔵体３の内部前方を介して連通管６を通ってインキタンク７内に戻される。   Further, in the direct liquid writing instrument 1 (Configuration 5), when the pressure in the ink tank 7 increases due to a temperature rise or the like, the excess ink pushed out from the ink tank 7 passes through the communication pipe 6 to form an ink. The ink is supplied to the front side of the occlusion body 3 and further supplied to the rear side of the ink occlusion body 3 to be temporarily impregnated. On the other hand, when the pressure in the ink tank 7 decreases due to a temperature drop or the like, the ink impregnated in the rear side of the ink occlusion body 3 passes through the communication pipe 6 through the inner front side of the ink occlusion body 3 and the ink tank 7. Returned in.

即ち、連通管６の各々の前端が、インキ吸蔵体３の前部内方に位置している構成により、インキタンク７内が圧力変化した際、インタンク７内の余剰インキを適正にインキ吸蔵体３に一時的に吸収させ、その後、その余剰インキをインキタンク７へ適正に戻すことができる。その結果、インキが外部に漏出することを十分に防止できる。   That is, because the front ends of the communication pipes 6 are positioned inside the front of the ink storage body 3, when the pressure in the ink tank 7 changes, the excess ink in the in-tank 7 is appropriately removed. 3 can be temporarily absorbed, and then the excess ink can be properly returned to the ink tank 7. As a result, the ink can be sufficiently prevented from leaking to the outside.

〔６〕前記直液式筆記具１（構成１乃至５）において、前記ペン先２の後端と前記連通管６の各々の前端との間は、前記インキ吸蔵体３を介してインキ流通可能に接続されること(構成６)が好ましい。 [6] In the direct liquid writing instrument 1 (configurations 1 to 5), ink can be circulated between the rear end of the nib 2 and the front end of each of the communication pipes 6 via the ink occlusion body 3. It is preferable to be connected (Configuration 6).

前記直液式筆記具１（構成６）は、前記ペン先２の後端と、前記連通管６の各々の前端とが、直接接続されていないため、少なくともペン先２の後端と連通管６の各々の前端との間のインキ吸蔵体３内部には一定量のインキが含浸されている。それにより、ペン先上向き状態や筆記具本体の水平状態などのインキタンク７からのインキ供給が無い場合でも、前記ペン先２の後端と連通管６の各々の前端との間のインキ吸蔵体３内部に含浸されたインキによって十分に筆記可能となる。   In the direct liquid writing instrument 1 (configuration 6), since the rear end of the pen tip 2 and the front end of each of the communication pipes 6 are not directly connected, at least the rear end of the pen tip 2 and the communication pipe 6 are used. A predetermined amount of ink is impregnated in the ink storage body 3 between each of the front ends. Thereby, even when there is no ink supply from the ink tank 7 such as the pen tip upward state or the writing instrument main body horizontal state, the ink occlusion body 3 between the rear end of the pen tip 2 and the front end of each of the communication pipes 6. The ink impregnated inside can be sufficiently written.

〔７〕前記直液式筆記具１（構成１乃至６）において、前記連通管６の各々の前端をインキ吸蔵体３の後端から前方に挿入し、インキ吸蔵体３の内部を前方に押圧圧縮することによって、前記連通管６の各々の前端近傍のインキ吸蔵体３の密度を、前記連通管６の各々の前端近傍以外の部分のインキ吸蔵体３の密度よりも高く設定すること（構成７）が好ましい。 [7] In the direct liquid writing instrument 1 (configurations 1 to 6), the front end of each of the communication pipes 6 is inserted forward from the rear end of the ink storage body 3, and the inside of the ink storage body 3 is pressed and compressed forward. By doing so, the density of the ink occlusion body 3 in the vicinity of the front end of each of the communication pipes 6 is set higher than the density of the ink occlusion bodies 3 in the portions other than the vicinity of the front end of each of the communication pipes 6 (Configuration 7). ) Is preferred.

前記直液式筆記具１（構成７）は、インキ吸蔵体３が、連通管６の各々の前端近傍の密度を高く設定した部分（高密度部３１）と、連通管６の各々の前端近傍以外の密度を低く設定した部分（低密度部３２）とを備える。そのため、インキ吸蔵体３内部におけるインキを、低密度部３２よりも高密度部３１に、優先して含浸させることができる。それにより、連通管６の各々の前端開口部を含浸インキによって、確実に液シールできる。その結果、温度低下等によりインキタンク７内の圧力が減少した際、インキ吸蔵体３内に含浸されたインキが、インキ吸蔵体３内に残留することがなく、インキ吸蔵体３の高密度部３１から連通管６を通って、適正にインキタンク７内に戻される。   In the direct liquid writing instrument 1 (Configuration 7), the ink occlusion body 3 has a portion where the density in the vicinity of each front end of the communication pipe 6 is set high (high density portion 31) and the vicinity of the front end of each of the communication pipes 6 And a portion (low density portion 32) in which the density is set low. Therefore, the ink in the ink occlusion body 3 can be preferentially impregnated in the high density portion 31 rather than the low density portion 32. Thereby, each front end opening of the communication pipe 6 can be reliably liquid-sealed with the impregnation ink. As a result, when the pressure in the ink tank 7 decreases due to a temperature drop or the like, the ink impregnated in the ink storage body 3 does not remain in the ink storage body 3, and the high density portion of the ink storage body 3 From 31, it passes through the communication pipe 6 and is properly returned into the ink tank 7.

また、前記直液式筆記具１（構成７）は、インキ吸蔵体３の密度差（即ちインキ吸蔵体３の高密度部３１と低密度部３２）を、連通管６の各々の前端を前記インキ吸蔵体３の後端から前方に挿入し、インキ吸蔵体３の内部を前方に押圧圧縮することによって形成するため、連通管６をインキ吸蔵体３に組み込む前に、予めインキ吸蔵体３に密度差を設ける必要がなく、製造が極めて容易となる。   Further, the direct liquid writing instrument 1 (Configuration 7) has a difference in density of the ink occluding body 3 (that is, the high density portion 31 and the low density portion 32 of the ink occluding body 3), and the front end of each communication pipe 6 is connected to the ink occlusion body 3. Since the inside of the ink storage body 3 is inserted forward from the rear end of the storage body 3 and pressed and compressed inside, the density of the ink storage body 3 is set in advance before the communication tube 6 is incorporated into the ink storage body 3. There is no need to provide a difference, and manufacturing becomes extremely easy.

〔８〕前記直液式筆記具１（構成７）において、前記連通管６の各々の前端近傍以外のインキ吸蔵体３の空隙率が７０％〜９５％であり、前記連通管６の各々の前端近傍以外のインキ吸蔵体３の空隙率と、前記連通管６の各々の前端近傍のインキ吸蔵体３の空隙率との差が７％以上（好ましくは１０％以上）であること（構成８）が好ましい。 [8] In the direct liquid writing instrument 1 (Configuration 7), the porosity of the ink occlusion body 3 other than the vicinity of the front end of each of the communication pipes 6 is 70% to 95%, and the front end of each of the communication pipes 6 The difference between the porosity of the ink occlusion body 3 other than the vicinity and the porosity of the ink occlusion body 3 near the front end of each of the communication pipes 6 is 7% or more (preferably 10% or more) (Configuration 8). Is preferred.

前記直液式筆記具（構成８）において、前記連通管６の各々の前端近傍以外のインキ吸蔵体３の空隙率とは、連通管６の各々の前端近傍以外の密度を低く設定した部分（低密度部３２）のインキ吸蔵体３の空隙率であり、前記連通管６の各々の前端近傍のインキ吸蔵体３の空隙率とは、連通管６の各々の前端近傍の密度を高く設定した部分（高密度部３１）のインキ吸蔵体３の空隙率である。前記低密度部３２の空隙率を７０％〜９５％の範囲に設定し、且つ、前記低密度部３２の空隙率と高密度部３１の空隙率との差を７％以上に設定したことにより、一層、連通管６の各々の前端開口部を含浸インキによって、確実に液シールできる。   In the direct liquid writing instrument (Configuration 8), the porosity of the ink occlusion body 3 other than the vicinity of the front end of each of the communication pipes 6 is a portion where the density other than the vicinity of the front end of each of the communication pipes 6 is set low (low Density portion 32) is the porosity of the ink occlusion body 3, and the porosity of the ink occlusion body 3 in the vicinity of each front end of the communication pipe 6 is a portion where the density in the vicinity of each front end of the communication pipe 6 is set high. It is the porosity of the ink occlusion body 3 of (high density part 31). By setting the porosity of the low density portion 32 in the range of 70% to 95% and setting the difference between the porosity of the low density portion 32 and the porosity of the high density portion 31 to 7% or more. In addition, the front end opening of each communication pipe 6 can be liquid-sealed with impregnation ink.

〔９〕前記直液式筆記具１（構成７）において、前記連通管６の各々の前端を先鋭形状としたこと(構成９)が好ましい。 [9] In the direct liquid writing instrument 1 (Configuration 7), it is preferable that each front end of the communication pipe 6 has a sharp shape (Configuration 9).

前記直液式筆記具１（構成９）は、連通管６の各々の前端が先鋭形状となっているため、各々の連通管６をインキ吸蔵体３の後端からスムーズに突き刺し挿入することができる。その結果、予めインキ吸蔵体３に連通管挿入用の孔を設ける必要がなく、組立工程を簡素化できる。   In the direct liquid writing instrument 1 (Configuration 9), since the front ends of the communication pipes 6 are sharpened, each of the communication pipes 6 can be smoothly inserted and inserted from the rear end of the ink storage body 3. . As a result, there is no need to previously provide a hole for inserting the communication pipe in the ink occlusion body 3, and the assembly process can be simplified.

〔１０〕前記直液式筆記具１（構成９）において、前記連通管６の各々の前端がその前端開口部を含む傾斜カット面６１からなること（構成１０）が好ましい。 [10] In the direct liquid writing instrument 1 (Configuration 9), it is preferable that each front end of the communication pipe 6 includes an inclined cut surface 61 including the front end opening (Configuration 10).

前記連通管６の各々の前端の先鋭形状をその前端開口部を含む傾斜カット面６１によって構成したこと（構成１０）により、各々の連通管６のインキ吸蔵体３への突き刺し挿入性が、より一層、向上するとともに、各々の連通管６の前端開口部の開口面積が増加し、インキ吸蔵体３の内部へのインキの供給を迅速にできる。   The sharp shape of the front end of each of the communication pipes 6 is configured by the inclined cut surface 61 including the front end opening (configuration 10), so that the insertion insertion property of each communication pipe 6 into the ink occlusion body 3 is further improved. In addition to the further improvement, the opening area of the front end opening of each communication pipe 6 is increased, and the ink supply to the inside of the ink occluding body 3 can be performed rapidly.

〔１１〕前記直液式筆記具１（構成１乃至１０）において、前記インキ吸蔵体３の前端から前記連通管６の各々の前端までの軸方向の距離Ｓ１，Ｓ２が、前記インキ吸蔵体３全体の軸方向の長さＬの３％以上５０％以下（好ましくは３％以上３０％以下）に設定されること（構成１１）が好ましい。 [11] In the direct liquid writing instrument 1 (configurations 1 to 10), the axial distances S1 and S2 from the front end of the ink storage body 3 to the front ends of the communication pipes 6 are the entire ink storage body 3 It is preferably set to 3% to 50% (preferably 3% to 30%) of the length L in the axial direction (Configuration 11).

前記直液式筆記具１（構成１１）は、インキタンク７の内圧上昇時にインキ吸蔵体３の前端よりインキが漏出することがなく、しかも、筆跡途切れや筆跡カスレのない、ペン先２先端からの十分なインキ流出性が得られる。もし、インキ吸蔵体３の前端からその後方に位置する連通管６の各々の前端までの軸方向の距離Ｓ１，Ｓ２がインキ吸蔵体３全体の軸方向の長さの３％未満であると、インキタンク７の内圧上昇時にインキ吸蔵体３の前端よりインキが漏出するおそれがある。また、もし、インキ吸蔵体３の前端からその後方に位置する連通管６の各々の前端までの軸方向の距離Ｓ１，Ｓ２がインキ吸蔵体３全体の軸方向の長さの５０％を越えると、連通管６の各々の前端からペン先２先端までの距離が長くなり、インキ流出性が阻害されるおそれがある。   The direct liquid type writing instrument 1 (configuration 11) does not leak ink from the front end of the ink occlusion body 3 when the internal pressure of the ink tank 7 increases, and further, there is no handwriting breakage or handwriting scraping. Sufficient ink outflow is obtained. If the axial distances S1 and S2 from the front end of the ink storage body 3 to the front ends of the communication pipes 6 positioned behind the ink storage body 3 are less than 3% of the axial length of the entire ink storage body 3, When the internal pressure of the ink tank 7 increases, the ink may leak out from the front end of the ink occlusion body 3. Further, if the axial distances S1 and S2 from the front end of the ink storage body 3 to the front ends of the communication pipes 6 positioned behind the ink storage body 3 exceed 50% of the overall length of the ink storage body 3 in the axial direction. The distance from the front end of each of the communication pipes 6 to the tip of the pen tip 2 becomes long, and there is a possibility that the ink outflow property is hindered.

〔１２〕前記直液式筆記具１（構成１乃至１１）において、前記インキ吸蔵体３の前端から前記連通管６の各々の前端までの軸方向の距離Ｓ１，Ｓ２が等しく設定されること（構成１２）が好ましい。 [12] In the direct liquid writing instrument 1 (Configurations 1 to 11), the axial distances S1 and S2 from the front end of the ink occlusion body 3 to the front ends of the communication pipes 6 are set equal (configuration). 12) is preferred.

前記直液式筆記具１（構成１２）は、インキ吸蔵体３の内部における連通管６の各々の前端の相互間の距離が一層短くなり、連通管６の各々の前端開口部の液シール性が向上し、外部へのインキ漏出を、より一層防止できる。   In the direct liquid writing instrument 1 (Configuration 12), the distance between the front ends of the communication pipes 6 in the ink storage body 3 is further shortened, and the liquid sealability of each front end opening of the communication pipe 6 is improved. This can further prevent ink leakage to the outside.

〔１３〕前記直液式筆記具１（構成１乃至１２）において、前記連通管６の各々の前端と前記ペン先２の後端との軸方向の距離Ｔ１，Ｔ２が１０ｍｍ（ミリメートル）以内に設定されること（構成１３）が好ましい。 [13] In the direct liquid writing instrument 1 (configurations 1 to 12), axial distances T1 and T2 between the front end of each of the communication pipes 6 and the rear end of the nib 2 are set within 10 mm (millimeters). (Configuration 13) is preferable.

前記直液式筆記具１（構成１３）は、初期インキ出し時、連通管６の各々の前端からペン先２の後端にインキが迅速に供給され、短時間で筆記可能となる。もし、連通管６の各々の前端とペン先２の後端との軸方向の距離Ｔ１，Ｔ２が１０ｍｍを越えると、連通管６の各々の前端とペン先２の後端との距離が大きくなり、連通管６の各々の前端からペン先２の後端への迅速なインキ供給できず、初期インキ出し時、筆記可能となるまでに相当の時間を要するおそれがある。尚、前記連通管６の各々の前端は、ペン先２の後端より前方に位置していてもよいし、あるいは、ペン先２の後端より後方に位置していてもよい。   In the direct liquid writing instrument 1 (configuration 13), ink is rapidly supplied from the front end of each of the communication pipes 6 to the rear end of the pen tip 2 at the time of initial ink discharge, and writing can be performed in a short time. If the axial distances T1 and T2 between the front ends of the communication pipes 6 and the rear end of the pen tip 2 exceed 10 mm, the distances between the front ends of the communication pipes 6 and the rear end of the pen tip 2 become large. Therefore, the ink cannot be supplied quickly from the front end of each of the communication pipes 6 to the rear end of the pen tip 2, and there is a possibility that a considerable time is required until writing becomes possible at the time of initial ink ejection. Note that the front end of each of the communication pipes 6 may be located in front of the rear end of the pen tip 2 or may be located in the rear of the rear end of the pen tip 2.

〔１４〕前記直液式筆記具１（構成１乃至１３）において、前記連通管６の各々の前端と前記ペン先２の後端との間の間隔が等しく設定されること(構成１４)がましい。 [14] In the direct liquid writing instrument 1 (Configurations 1 to 13), the distance between the front end of each of the communication pipes 6 and the rear end of the nib 2 is set equal (Configuration 14). Yes.

前記直液式筆記具１（構成１４）は、初期インキ出し時、インキタンク７からのインキが、複数本の連通管６の中で、いずれの連通管６の前端開口部からペン先２の後端に供給された場合でも、ばらつき無く、一定時間で筆記可能となる。 In the direct liquid writing instrument 1 (configuration 14), the ink from the ink tank 7 is discharged from the front end opening of any of the communication pipes 6 to the back of the pen tip 2 during the initial ink discharge. Even when supplied to the end, writing can be performed in a certain time without variation.

〔１５〕前記直液式筆記具１（構成１乃至１４）において、前記インキ吸蔵体３の前端面及び後端面が外気と連通されること（構成１５）が好ましい。 [15] In the direct liquid writing instrument 1 (Configurations 1 to 14), it is preferable that the front end surface and the rear end surface of the ink occlusion body 3 communicate with outside air (Configuration 15).

前記直液式筆記具１（構成１５）は、インキ吸蔵体３の内部の空気を、インキ吸蔵体３の前端面及びインキ吸蔵体３の後端面から逃がすことができる。それにより、インキ吸蔵体３の内部の連通管６の前端開口部から供給されたインキを、前記インキ吸蔵体３の内部の連通管６の前端近傍から、インキ吸蔵体３の前端方向、及び連通管６の前端近傍のインキ吸蔵体３の内部からインキ吸蔵体３の後端方向へスムーズに移動させることができる。特に、インキ吸蔵体３の後端面と外気が連通することにより、温度上昇等によるインキタンク７内の圧力上昇時、インキタンク７内から押し出されたインキが、スムーズに連通管６の前端よりインキ吸蔵体３の連通管６の前端近傍を介して後方へ移動し、インキ吸蔵体３の後方に含浸され、インキの外部への漏出を防ぎ、一方、温度低下等よるインキタンク７内の圧力減少時、インキ吸蔵体３の後方の含浸インキを、インキ吸蔵体３内部の連通管６の前端近傍を介して連通管６の前端開口部より連通管６内を通してインキタンク７内に戻すことができる。   The direct liquid writing instrument 1 (Configuration 15) can release the air inside the ink occlusion body 3 from the front end face of the ink occlusion body 3 and the rear end face of the ink occlusion body 3. As a result, the ink supplied from the front end opening of the communication pipe 6 inside the ink storage body 3 is passed from the vicinity of the front end of the communication pipe 6 inside the ink storage body 3 to the front end direction and the communication of the ink storage body 3. The ink occlusion body 3 in the vicinity of the front end of the tube 6 can be smoothly moved from the inside to the rear end direction of the ink occlusion body 3. In particular, when the pressure in the ink tank 7 rises due to a temperature rise or the like, the ink pushed out from the ink tank 7 smoothly passes through the front end of the communication pipe 6 when the rear end surface of the ink occlusion body 3 communicates with the outside air. It moves rearward through the vicinity of the front end of the communicating pipe 6 of the occlusion body 3 and is impregnated in the rear of the ink occlusion body 3 to prevent leakage of the ink to the outside. At this time, the impregnated ink behind the ink storage body 3 can be returned to the ink tank 7 through the communication pipe 6 from the front end opening of the communication pipe 6 through the vicinity of the front end of the communication pipe 6 inside the ink storage body 3. .

〔１６〕前記直液式筆記具１（構成１乃至１５）において、前記連通管６の各々の内部に、毛細間隙を備えたインキ吸収体６３を配置したこと(構成１６)が好ましい。 [16] In the direct liquid writing instrument 1 (Configurations 1 to 15), it is preferable that an ink absorber 63 having a capillary gap is disposed inside each of the communication pipes 6 (Configuration 16).

前記直液式筆記具１（構成１６）により、連通管６の折れ曲がりを抑えるために各々の連通管６の外径および内径を比較的大きく設定した場合でも、連通管６の前端開口部の適正な液シールが得られる。 Even when the outer diameter and the inner diameter of each communication pipe 6 are set to be relatively large in order to suppress the bending of the communication pipe 6 by the direct liquid writing instrument 1 (configuration 16), the front end opening of the communication pipe 6 is appropriately A liquid seal is obtained.

〔１７〕前記直液式筆記具１（構成１乃至１６）において、前記連通管６の各々の側壁を互いに連結すること（構成１７）が好ましい。 [17] In the direct liquid writing instrument 1 (Configurations 1 to 16), it is preferable to connect the side walls of the communication pipe 6 to each other (Configuration 17).

前記直液式筆記具１（構成１７）により、各々の連通管６の屈曲強度が向上し、各々の連通管６の折れ曲がりを抑えることができる。 With the direct liquid writing instrument 1 (Configuration 17), the bending strength of each communication pipe 6 is improved, and bending of each communication pipe 6 can be suppressed.

（連通管）
尚、本発明で、前記連通管６は、一定の剛性を備える点で、合成樹脂製または金属製であることが好ましい。また、前記連通管６の外周面及び内周面の横断面形状は、例えば、円形、楕円、または３角形、４角形等の多角形等、いずれであってもよい。また、前記連通管６の本数は、複数本（即ち２本以上）であればよく、例えば、２本、３本、４本、５本または６本等が挙げられる。また、前記連通管６の各々は、前後方向に延設され、その各々の内部に流通路６２が前後方向に貫設される。また、前記複数本の連通管６とは、その内部に独立した複数の流通路６２が並列に形成された構成であればよく、例えば、各々の連通管６が径方向に離隔した構成（図１乃至図５参照）、各々連通管６の側壁が互いに連結した構成（図６乃至図８参照）、または大径の連通管６ａの内部に小径の連通管６ｂを配置した構成（図９参照）等が挙げられる。また、前記連通管６の各々の前端は、ペン先２を中心とする同一円周上に等間隔に位置することが好ましい。また、前記連通管６の各々の前端は、軸方向前方に開口してもよいし、径方向外方に開口してもよい。前記連通管６の各々の前端の形状は、例えば、傾斜カット面、垂直面、円錐面、凸曲面等が挙げられる。 (Communication pipe)
In the present invention, the communication pipe 6 is preferably made of synthetic resin or metal in that it has a certain rigidity. Further, the cross-sectional shape of the outer peripheral surface and inner peripheral surface of the communication pipe 6 may be any of, for example, a circle, an ellipse, or a polygon such as a triangle or a quadrangle. Moreover, the number of the said communication pipe | tube 6 should just be two or more (namely, 2 or more), for example, 2, 3, 4, 5 or 6 etc. are mentioned. Each of the communication pipes 6 extends in the front-rear direction, and a flow passage 62 is provided through each of the communication pipes 6 in the front-rear direction. Further, the plurality of communication pipes 6 may be configured so that a plurality of independent flow passages 62 are formed in parallel in the interior thereof. For example, the respective communication pipes 6 are separated in the radial direction (see FIG. 1 to FIG. 5), the configuration in which the side walls of the communication pipes 6 are connected to each other (see FIG. 6 to FIG. 8), or the configuration in which the small diameter communication pipe 6b is arranged inside the large diameter communication pipe 6a (see FIG. 9). ) And the like. The front ends of the communication pipes 6 are preferably located at equal intervals on the same circumference with the nib 2 as the center. Further, the front end of each of the communication pipes 6 may be opened forward in the axial direction or may be opened outward in the radial direction. Examples of the shape of the front end of each communication pipe 6 include an inclined cut surface, a vertical surface, a conical surface, and a convex curved surface.

（インキ吸蔵体）
尚、本発明で、前記インキ吸蔵体３は、インキを含浸可能な連続気孔を有する部材（即ち多孔質材料）からなるものであればよく、例えば、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、フェルトのニードルパンチ加工体、合成樹脂の連続気泡体等が挙げられる。また、前記インキ吸蔵体３は、その外周面に合成樹脂フィルム等よりなる外皮を備える構成でもよい。また、前記インキ吸蔵体３の内部前方とは、インキ吸蔵体３の前半部の内部のことである。前記インキ吸蔵体３は、単一の部材であってもよいし、毛細管力の異なる複数の部材であってもよい。 (Ink storage)
In the present invention, the ink occlusion body 3 may be made of a member having continuous pores that can be impregnated with ink (that is, a porous material). Resin processed body, felt resin processed body, felt needle punch processed body, synthetic resin open cell body, and the like. In addition, the ink occlusion body 3 may be configured to have an outer skin made of a synthetic resin film or the like on the outer peripheral surface thereof. Further, the inside front of the ink occlusion body 3 refers to the inside of the front half of the ink occlusion body 3. The ink occlusion body 3 may be a single member or a plurality of members having different capillary forces.

（ペン先）
尚、本発明で、前記ペン先２は、例えば、繊維束の樹脂加工体、繊維束の熱融着加工体、フェルト加工体、パイプ状ペン体、先端にスリットを有する万年筆型板状ペン体、毛筆ペン体、合成樹脂の多孔質気泡体、ボールペンチップ、軸方向のインキ誘導路を有する合成樹脂の押出成形体等が挙げられる。また、前記ペン先２の後端を構成する材料は、少なくとも、インキ吸蔵体３との適正な接続を可能にするために毛細間隙を備えた部材であればよく、例えば、繊維束の樹脂加工体、繊維束の熱融着加工体、フェルト加工体、合成樹脂の多孔質気泡体等の多孔質材料、または軸方向のインキ誘導路を有する合成樹脂の押出成形体が挙げられる。 (Nib)
In the present invention, the nib 2 is, for example, a fiber bundle resin processed body, a fiber bundle heat fusion processed body, a felt processed body, a pipe-shaped pen body, and a fountain pen type plate-shaped pen body having a slit at the tip. A brush pen body, a porous foam of a synthetic resin, a ballpoint pen tip, an extruded body of a synthetic resin having an axial ink guide path, and the like. The material constituting the rear end of the nib 2 may be at least a member having a capillary gap in order to enable proper connection with the ink occlusion body 3, for example, resin processing of a fiber bundle. Examples thereof include a porous material such as a body, a heat-bonded processed body of fiber bundles, a felt processed body, and a porous foam of a synthetic resin, or an extruded body of a synthetic resin having an axial ink guide path.

（インキ吸収体）
尚、前記インキ吸収体６３は、毛細間隙を備えるものであればよく、例えば、繊維束の樹脂加工体、繊維束の熱融着加工体、フェルト加工体、合成樹脂の多孔質気泡体等の多孔質材料、または軸方向のインキ誘導路を有する合成樹脂の押出成形体等が挙げられる。前記インキ吸収体６３の毛細管力は、インキ吸蔵体３内部の連通管６の各々の前端近傍部分（高密度部３１）の毛細管力よりも、小さく設定されることが好ましい。 (Ink absorber)
The ink absorber 63 only needs to have a capillary gap, such as a fiber bundle resin processed body, a fiber bundle heat-bonded processed body, a felt processed body, and a synthetic resin porous foam. Examples thereof include a porous material or an extruded product of a synthetic resin having an axial ink guide path. The capillary force of the ink absorber 63 is preferably set to be smaller than the capillary force of the vicinity of the front end (high density portion 31) of each of the communicating tubes 6 inside the ink storage member 3.

（第１実施例）
本発明の第１実施例の直液式筆記具１を図１乃至図２に示す。
本実施例の直液式筆記具１は、ペン先２と、前記ペン先２後端に接続されるインキ吸蔵体３と、前記ペン先２を前端部で保持し且つ前記インキ吸蔵体３を内部に収容する吸蔵体収容部と、前記吸蔵体収容部の後方に取り付けられ且つ内部にインキ８を直に貯溜するインキタンク７と、前記吸蔵体収容部と前記インキタンク７とを区画する隔壁５２と、前記隔壁５２の前面より前方に突出され、インキ吸蔵体３の内部に突き刺し接続される複数本（具体的には２本）の連通管６とからなる。前記吸蔵体収容部は、前記ペン先２を保持する先部材４と、前記先部材４と前記インキタンク７とを接続する中間部材５とからなる。 (First embodiment)
A direct liquid writing instrument 1 according to a first embodiment of the present invention is shown in FIGS.
The direct liquid writing instrument 1 of the present embodiment includes a pen tip 2, an ink occlusion body 3 connected to the rear end of the pen nib 2, the pen nib 2 held at the front end portion, and the ink occlusion body 3 inside. An occlusion body accommodation portion, an ink tank 7 which is attached to the rear of the occlusion body accommodation portion and directly stores the ink 8 therein, and a partition wall 52 which partitions the occlusion body accommodation portion and the ink tank 7 from each other. And a plurality of (specifically, two) communication pipes 6 that protrude forward from the front surface of the partition wall 52 and are pierced and connected to the inside of the ink storage body 3. The occlusion body housing portion includes a tip member 4 that holds the nib 2 and an intermediate member 5 that connects the tip member 4 and the ink tank 7.

・ペン先
前記ペン先２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、ナイロン繊維等）の樹脂加工により得られる棒状体である。前記ペン先２の先端は、砲弾状に研削される。前記ペン先２の後端部外周面は、テーパ状に面取りされる。前記ペン先２の中間部は、環状溝２１が形成される。 Pen nib The pen nib 2 is a rod-like body obtained by resin processing of synthetic resin fibers (for example, polyester fibers, acrylic fibers, nylon fibers, etc.). The tip of the nib 2 is ground like a cannonball. The outer peripheral surface of the rear end portion of the nib 2 is chamfered in a tapered shape. An annular groove 21 is formed at the intermediate portion of the nib 2.

・インキ吸蔵体
前記インキ吸蔵体３は、円柱状の合成樹脂製繊維（例えば、ポリエステル繊維）の加工体よりなる。前記インキ吸蔵体３の外周面には、円筒状の外皮が被覆されている。前記外皮は、合成樹脂製フィルム（例えはポリエチレンテレフタレート製フィルム）よりなる。前記インキ吸蔵体３の前端面の軸心にペン先２の後端が突き刺し挿入され、前記ペン先２の後端が前記インキ吸蔵体３の内部前方に位置される。 Ink occlusion body The ink occlusion body 3 is formed of a processed body of cylindrical synthetic resin fibers (for example, polyester fibers). The outer peripheral surface of the ink occlusion body 3 is covered with a cylindrical outer skin. The outer skin is made of a synthetic resin film (for example, a polyethylene terephthalate film). The rear end of the pen tip 2 is inserted into the axial center of the front end surface of the ink storage body 3 and the rear end of the pen tip 2 is positioned in front of the ink storage body 3.

・先部材
前記先部材４は、合成樹脂（例えば、ポリプロピレン、ポリエチレン等）の射出成形により得られる筒状体である。前記先部材４は、ペン先２外周面を保持する小径部４１と、該小径部４１より後方に連設され、インキ吸蔵体３の前部外周面を保持する大径部４２とからなる。 -Tip member The tip member 4 is a cylindrical body obtained by injection molding of synthetic resin (for example, polypropylene, polyethylene, etc.). The tip member 4 includes a small-diameter portion 41 that holds the outer peripheral surface of the nib 2 and a large-diameter portion 42 that is connected to the rear of the small-diameter portion 41 and holds the front outer peripheral surface of the ink occlusion body 3.

前記先部材４の内面（即ち小径部４１の内面から大径部４２の内面まで）には、前後方向に延びる複数本のリブ４３が一体に形成される。前記リブ４３には、前記先部材の小径部４１と大径部４２との中間部において、段形状の規制壁部４３ａが形成される。前記規制壁部４３ａにインキ吸蔵体３の前端が軸方向に当接し、前記大径部４２の内面のリブ４３にインキ吸蔵体３の前部外周面が圧接保持される。前記リブ４３は、前記小径部４１内面において、係止凸部４３ｂが形成される。前記小径部４１内面において、リブ４３によりペン先２の外周面が径方向に圧接保持されるとともに、前記係止凸部４３ｂにペン先２外周面の環状溝２１が係合し、ペン先２の前後方向の移動が規制される。   A plurality of ribs 43 extending in the front-rear direction are integrally formed on the inner surface of the tip member 4 (that is, from the inner surface of the small diameter portion 41 to the inner surface of the large diameter portion 42). In the rib 43, a step-shaped regulation wall 43a is formed at an intermediate portion between the small diameter portion 41 and the large diameter portion 42 of the tip member. The front end of the ink occlusion body 3 abuts against the restriction wall 43a in the axial direction, and the front outer peripheral surface of the ink occlusion body 3 is pressed and held by the rib 43 on the inner surface of the large diameter portion. The rib 43 is formed with a locking convex portion 43 b on the inner surface of the small diameter portion 41. On the inner surface of the small-diameter portion 41, the outer peripheral surface of the nib 2 is pressed and held in the radial direction by the rib 43, and the annular groove 21 on the outer peripheral surface of the nib 2 is engaged with the locking convex portion 43b. The movement in the front-rear direction is restricted.

前記リブ４３により、インキ吸蔵体３の前部外周面と大径部４２の内面との間、インキ吸蔵体３の前端面と先部材４の中間部内面との間、及びペン先２外周面と小径部４１内面との間に、空気通路１０が形成される。前記空気通路１０の前側は、先部材４の前端より外部に開口されるとともに、前記空気通路１０の後側は、インキ吸蔵体３の後端面と連通している。即ち、前記空気通路１０により、インキ吸蔵体３の前端面及びインキ吸蔵体３の後端面が、外気と連通される。   By the ribs 43, the space between the front outer peripheral surface of the ink occlusion body 3 and the inner surface of the large-diameter portion 42, the front end surface of the ink occlusion body 3 and the inner surface of the intermediate portion of the tip member 4, and the outer surface of the pen tip 2. And the air passage 10 is formed between the inner surface of the small-diameter portion 41. The front side of the air passage 10 is opened to the outside from the front end of the leading member 4, and the rear side of the air passage 10 is in communication with the rear end surface of the ink storage body 3. That is, the air passage 10 communicates the front end surface of the ink storage body 3 and the rear end surface of the ink storage body 3 with the outside air.

・中間部材
前記中間部材５は、合成樹脂（例えば、ポリプロピレン、ポリエチレン等）の射出成形より得られる筒状体である。前記中間部材５は、前方に開口する前方筒部５１と、該前方筒部５１の底部に形成される隔壁５２と、該隔壁５２から後方に延設され且つ後方に開口する後方筒部５３と、前記隔壁５２前面から軸方向前方に突出される複数（具体的には２本）の連通管６とが一体に連設されてなる。本実施例では、隔壁５２と連通管６とが一体に連設されているが、これ以外にも、別部材よりなる隔壁５２と連通管６とを固着させる構成でもよい。 Intermediate member The intermediate member 5 is a cylindrical body obtained by injection molding of a synthetic resin (for example, polypropylene, polyethylene, etc.). The intermediate member 5 includes a front cylinder portion 51 opening forward, a partition wall 52 formed at the bottom of the front cylinder portion 51, a rear cylinder portion 53 extending rearward from the partition wall 52 and opening rearward. A plurality of (specifically, two) communication pipes 6 projecting forward in the axial direction from the front surface of the partition wall 52 are integrally connected. In this embodiment, the partition wall 52 and the communication pipe 6 are integrally connected. However, in addition to this, the partition wall 52 and the communication pipe 6 made of different members may be fixed.

前記前方筒部５１の内周面には前記先部材４の大径部４２外周面が圧入固着される。前記前方筒部５１、隔壁５２、及び先部材４の大径部４２によって形成される空間（即ち吸蔵体収容部）に、インキ吸蔵体３が収容される。前記後方筒部５３にはインキタンク７の開口部が着脱自在に取り付けられる。具体的には、前記後方筒部５３にはインキタンク７の開口部が螺合により着脱自在に取り付けられる。   The outer peripheral surface of the large-diameter portion 42 of the tip member 4 is press-fitted and fixed to the inner peripheral surface of the front cylinder portion 51. The ink occlusion body 3 is accommodated in a space (that is, an occlusion body accommodation portion) formed by the front cylinder portion 51, the partition wall 52, and the large diameter portion 42 of the tip member 4. An opening of the ink tank 7 is detachably attached to the rear cylinder portion 53. Specifically, the opening of the ink tank 7 is detachably attached to the rear cylinder portion 53 by screwing.

前記隔壁５２と前記インキ吸蔵体３の後端面は非接触状態に維持され、前記隔壁５２と前記インキ吸蔵体３の後端面との間には、外気と連通する隙間９が形成される。前記隙間９は、前記空気通路１０を介して、外気と連通される。   The partition wall 52 and the rear end surface of the ink storage body 3 are maintained in a non-contact state, and a gap 9 communicating with outside air is formed between the partition wall 52 and the rear end surface of the ink storage body 3. The gap 9 is communicated with the outside air through the air passage 10.

・連通管
前記連通管６の各々の内部には、軸方向に流通路６２が設けられ、前記流通路６２が、前記連通管６の各々の両端にて開口される。前記連通管６の各々の前端は、インキ吸蔵体３の内部前方に開口され、前記連通管６の各々の後端は、インキ吸蔵体３後方のインキタンク７内に開口される。前記複数本の連通管６は、インキ吸蔵体３とインキタンク７との間に並列に配置されるため、インキ吸蔵体３と、その後方のインキタンク７との間に、独立した複数本の流通路６２が並列に設けられる。 -Communication pipe The flow path 62 is provided in the inside of each of the communication pipes 6 in the axial direction, and the flow paths 62 are opened at both ends of each of the communication pipes 6. The front ends of the communication pipes 6 are opened in front of the ink storage body 3, and the rear ends of the communication pipes 6 are opened in the ink tank 7 behind the ink storage body 3. Since the plurality of communication pipes 6 are arranged in parallel between the ink storage body 3 and the ink tank 7, a plurality of independent pipes 6 are provided between the ink storage body 3 and the ink tank 7 behind the ink storage body 3. A flow passage 62 is provided in parallel.

前記連通管６の各々は、前端が一つの傾斜カット面６１からなり、先鋭化される。前記連通管６の各々の前端は、インキ吸蔵体３の後端から前方に突き刺し挿入され、最後はインキ吸蔵体３の内部前方のペン先２後端近傍に位置される。前記連通管６の各々の前端がインキ吸蔵体３に突き刺し挿入される際、連通管６の各々の前端がインキ吸蔵体３の繊維を前方に押圧圧縮する。それにより、各々の連通管６の前端近傍のインキ吸蔵体３の繊維密度が、連通管６の各々の前端近傍以外の部分のインキ吸蔵体３の繊維密度よりも高く設定される。即ち、インキ吸蔵体３内部に、繊維密度の高い高密度部３１と、繊維密度の低い低密度部３２が形成される。前記連通管６の各々の前端はインキ吸蔵体３の内部前方に位置しているため、インキ吸蔵体３の内部前方に前記高密度部３１が形成され、インキ吸蔵体３の内部後方に前記低密度部３２が形成される。前記各々連通管６は、低密度部３２を後方から前方に貫通され、前記連通管６の各々の前端が低密度部３２より前方の高密度部３１の内部に位置される。尚、本実施例において、前記低密度部３２の空隙率（気孔率）は、８５％〜９３％に設定され、前記低密度部３２の空隙率と前記高密度部３１の空隙率との差は、２０％に設定されている。   Each of the communication pipes 6 has a front end formed of one inclined cut surface 61 and is sharpened. The front end of each of the communication pipes 6 is inserted forward by being inserted from the rear end of the ink storage body 3, and finally is positioned in the vicinity of the rear end of the pen tip 2 in front of the ink storage body 3. When the front ends of the communication pipes 6 are inserted into the ink storage body 3, the front ends of the communication pipes 6 press and compress the fibers of the ink storage body 3 forward. Thereby, the fiber density of the ink storage body 3 in the vicinity of the front end of each communication pipe 6 is set higher than the fiber density of the ink storage body 3 in a portion other than the vicinity of each front end of the communication pipe 6. That is, a high density portion 31 having a high fiber density and a low density portion 32 having a low fiber density are formed inside the ink occlusion body 3. Since the front end of each of the communication pipes 6 is located in front of the ink storage body 3, the high density portion 31 is formed in front of the ink storage body 3, and A density portion 32 is formed. Each of the communication pipes 6 penetrates the low density part 32 from the rear to the front, and the front end of each of the communication pipes 6 is positioned inside the high density part 31 ahead of the low density part 32. In this embodiment, the porosity (porosity) of the low density portion 32 is set to 85% to 93%, and the difference between the porosity of the low density portion 32 and the porosity of the high density portion 31 is set. Is set to 20%.

前記連通管６の各々の前端は、インキ吸蔵体３の軸心から径方向外方に離れた位置に配置される。詳細には、前記連通管６の各々の前端は、インキ吸蔵体３の軸心を中心とする同一円周上に等間隔で配置される。本実施例では、連通管６は２本であるので、前記連通管６はインキ吸蔵体３の軸心に対して１８０度対称位置に配置される。前記ペン先２がインキ吸蔵体３の軸心に位置しているので、前記連通管６の各々の前端は、ペン先２後端と直接接続されず、ペン先２と非接触状態にあり、インキ吸蔵体３の内部前方（高密度部３１）を介してインキ流通可能に接続される。また、前記連通管６の各々の前端は、ペン先２の後端より僅かに前方に位置している。   The front end of each of the communication pipes 6 is disposed at a position that is radially outward from the axis of the ink storage body 3. Specifically, the front ends of the communication pipes 6 are arranged at equal intervals on the same circumference centered on the axis of the ink storage body 3. In the present embodiment, since there are two communication pipes 6, the communication pipes 6 are arranged at 180 ° symmetrical positions with respect to the axis of the ink occlusion body 3. Since the nib 2 is located at the axial center of the ink occlusion body 3, the front end of each of the communication pipes 6 is not directly connected to the rear end of the nib 2 and is not in contact with the nib 2. The ink occluding body 3 is connected through the inside front (high density portion 31) so that ink can be distributed. Further, the front end of each of the communication pipes 6 is positioned slightly forward from the rear end of the pen tip 2.

前記連通管６の各々の前端の傾斜カット面６１は、連通管６の各々の前端開口部を含むよう形成される。前記傾斜カット面６１（即ち連通管６の前端開口部）は、インキ吸蔵体３の軸心方向（即ちペン先２後端方向）に向いている。それにより、インキをペン先２後端に迅速に供給できるとともに、連通管６の前端によってペン先２後端近傍の繊維がペン先２後端方向に向かって押圧圧縮され、ペン先２後端近傍の繊維密度を容易に高く設定できる。本実施例では、前記連通管６の各々の外面及び内面の横断面は円形状であり、前記連通管６の各々の前端の外周縁及び内周縁は、傾斜カット面６１により、楕円形状となっている。   The inclined cut surface 61 at the front end of each of the communication pipes 6 is formed to include the front end opening of each of the communication pipes 6. The inclined cut surface 61 (that is, the front end opening of the communication pipe 6) faces the axial direction of the ink storage body 3 (that is, the rear end direction of the pen tip 2). As a result, ink can be quickly supplied to the rear end of the nib 2, and the fibers near the rear end of the nib 2 are pressed and compressed toward the rear end of the nib 2 by the front end of the communication pipe 6. The fiber density in the vicinity can be easily set high. In this embodiment, the cross section of each outer surface and inner surface of the communication pipe 6 is circular, and the outer peripheral edge and inner peripheral edge of each front end of the communication pipe 6 are elliptical due to the inclined cut surface 61. ing.

・軸方向の距離
尚、本実施例において、前記インキ吸蔵体３全体の軸方向の長さＬは、３０ｍｍに設定される。また、本実施例において、前記インキ吸蔵体３の前端から前記連通管６の各々の前端までの軸方向の距離Ｓ１，Ｓ２は、両者とも４ｍｍに設定される。よって、前記インキ吸蔵体３の前端から前記連通管６の各々の前端までの軸方向の距離Ｓ１，Ｓ２は、前記インキ吸蔵体３全体の軸方向の長さＬの１３．３％（即ち３％〜５０％の範囲内）である。また、本実施例において、前記連通管６の各々の前端と前記ペン先２の後端との軸方向の距離Ｔ１，Ｔ２は、両者とも１ｍｍ（即ち１０ｍｍ以内）に設定される。 -Distance in the axial direction In the present embodiment, the length L in the axial direction of the entire ink occlusion body 3 is set to 30 mm. In this embodiment, the axial distances S1 and S2 from the front end of the ink storage body 3 to the front ends of the communication pipes 6 are both set to 4 mm. Therefore, the axial distances S1 and S2 from the front end of the ink storage body 3 to the front ends of the communication pipes 6 are 13.3% of the axial length L of the entire ink storage body 3 (that is, 3). % To 50%). In this embodiment, the axial distances T1 and T2 between the front end of each of the communication pipes 6 and the rear end of the pen tip 2 are both set to 1 mm (that is, within 10 mm).

・インキタンク
前記インキタンク７は、前端が開口し後端が閉鎖された有底筒状体であり、合成樹脂の射出成形またはブロー成形により得られる。前記インキタンク７内には、直にインキ８が貯溜される。前記インキタンク７内に貯溜されるインキ８は、水性インキ、油性インキのいずれであってもよい。 Ink tank The ink tank 7 is a bottomed cylindrical body having a front end opened and a rear end closed, and is obtained by injection molding or blow molding of a synthetic resin. Ink 8 is stored directly in the ink tank 7. The ink 8 stored in the ink tank 7 may be either water-based ink or oil-based ink.

前記インキタンク７の前端開口部は、中間部材５と着脱自在に取り付けられる。前記インキタンク７のインキ８が消費され筆記不能となった場合、前記インキタンク７を中間部材５から取り外し、そのインキタンク７の内部にインキ８を充填した後、または、内部にインキ８が充填された新たなインキタンク７と交換した後、前記内部にインキ８が充填されたインキタンク７を中間部材５に取り付ける。それにより、再び、筆記可能となる。   The front end opening of the ink tank 7 is detachably attached to the intermediate member 5. When ink 8 in the ink tank 7 is consumed and writing becomes impossible, the ink tank 7 is removed from the intermediate member 5 and the ink tank 7 is filled with the ink 8 or filled with the ink 8 After the new ink tank 7 is replaced, the ink tank 7 filled with the ink 8 is attached to the intermediate member 5. Thereby, writing becomes possible again.

（第２実施例）
図３に本発明の第２実施例を示す。
本実施例は、第１実施例の変形例であり、第１実施例と異なる点はペン先２の先端がチゼル形状を有する点、及び連通管６と隔壁５２とが別部材によりなる点である。 (Second embodiment)
FIG. 3 shows a second embodiment of the present invention.
This embodiment is a modification of the first embodiment, and is different from the first embodiment in that the tip of the nib 2 has a chisel shape and that the communication pipe 6 and the partition wall 52 are made of different members. is there.

前記隔壁５２には、前後方向に二つの取付孔５２ａが貫設される。前記各々の取付孔５２ａに連通管６が圧入固着される。また、前記隔壁５２の前面には、前記取付孔５２ａが前方に開口される環状凸部５２ｂが一体に形成される。前記環状凸部５２ｂと前記インキ吸蔵体３の後端面とが当接され、前記インキ吸蔵体３の後端面と隔壁５２との間に、前記環状凸部５２ｂの突出寸法に応じた隙間９が適正に形成される。また、前記インキ吸蔵体３の前端面が規制壁部４３ａに当接され、且つ、前記インキ吸蔵体３の後端面が前記環状凸部５２ｂにより当接される構成のため、インキ吸蔵体３の前後方向のガタツキを防止できる。尚、前記以外の点は、第１実施例と同様の構成であるため説明を省略する。   The partition wall 52 is provided with two mounting holes 52a extending in the front-rear direction. The communication pipe 6 is press-fitted and fixed to each of the mounting holes 52a. In addition, an annular convex portion 52b in which the mounting hole 52a is opened forward is integrally formed on the front surface of the partition wall 52. The annular convex portion 52b and the rear end surface of the ink storage body 3 are brought into contact with each other, and a gap 9 corresponding to the projecting dimension of the annular convex portion 52b is formed between the rear end surface of the ink storage body 3 and the partition wall 52. Properly formed. Further, since the front end surface of the ink occlusion body 3 is in contact with the regulating wall 43a and the rear end surface of the ink occlusion body 3 is in contact with the annular convex portion 52b, It is possible to prevent back and forth rattling. Since the configuration other than the above is the same as that of the first embodiment, the description thereof is omitted.

（第３実施例）
図４に本発明の第３実施例を示す。
本実施例は、第１実施例の変形例であり、ペン先２がボールペンチップよりなる。前記ペン先２は、先端に回転可能にボール２２を抱持するホルダー２３と、該ホルダー２３内に挿着されるインキ誘導部材２４とからなる。前記インキ誘導部材２４は、棒状の合成樹脂製繊維の樹脂加工体からなり、その後端が、インキ吸蔵体３の前端より突き刺し挿入され、インキ吸蔵体３の内部前方に位置されている。また、先部材４の小径部４１側壁には、空気孔４４が穿設される。前記空気孔４４により、外気と先部材４内の空気通路１０とが連通される。尚、前記以外の構成は、第１実施例と同様の構成であるため説明を省略する。 (Third embodiment)
FIG. 4 shows a third embodiment of the present invention.
This embodiment is a modification of the first embodiment, and the pen tip 2 is made of a ballpoint pen tip. The nib 2 includes a holder 23 that holds a ball 22 rotatably at the tip, and an ink guide member 24 that is inserted into the holder 23. The ink guide member 24 is made of a resin processed body made of a rod-shaped synthetic resin fiber, and its rear end is inserted and inserted from the front end of the ink storage body 3, and is positioned in front of the ink storage body 3. An air hole 44 is formed in the side wall of the small diameter portion 41 of the tip member 4. The air hole 44 allows the outside air to communicate with the air passage 10 in the tip member 4. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

（第４実施例）
図５に本発明の第４実施例を示す。
本実施例は、第１実施例の変形例であり、第１実施例と異なる点は、繊維加工体よりなるインキ吸収体６３を各々連通管６の流通路６２内に収容した点である。前記インキ吸収体６３の繊維密度（毛細管力）は、インキ吸蔵体３の高密度部３１の繊維密度（毛細管力）よりも小さく設定される。前記インキ吸収体６３を連通管６に収容したことによって、連通管６の外径及び内径を比較的大きく設定しても、連通管６の前端開口部の適正に液シールすることができる。その結果、連通管６の外径及び内径を太く設定でき、連通管６の折れ曲がり防止に有利となる。尚、前記以外の構成は、第１実施例と同様の構成であるため説明を省略する。 (Fourth embodiment)
FIG. 5 shows a fourth embodiment of the present invention.
This embodiment is a modification of the first embodiment, and is different from the first embodiment in that an ink absorber 63 made of a fiber processed body is accommodated in the flow passage 62 of the communication pipe 6. The fiber density (capillary force) of the ink absorber 63 is set smaller than the fiber density (capillary force) of the high density portion 31 of the ink occlusion body 3. By accommodating the ink absorber 63 in the communication pipe 6, even if the outer diameter and inner diameter of the communication pipe 6 are set to be relatively large, the front end opening of the communication pipe 6 can be properly liquid-sealed. As a result, the outer diameter and inner diameter of the communication pipe 6 can be set thick, which is advantageous for preventing the communication pipe 6 from being bent. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

（第５実施例）
図６及び図７に本発明の第５実施例を示す。
本実施例は、第１実施例の変形例であり、第１実施例と異なる点は、各々の連通管６の側壁を軸方向に延びる板状リブ６４により互いに一体に連結した点である。それにより、各々の連通管６の屈曲強度が向上し、インキ吸蔵体３への安定した突き刺し挿入が得られる。尚、前記以外の構成は、第１実施例と同様の構成であるため説明を省略する。 (5th Example)
6 and 7 show a fifth embodiment of the present invention.
This embodiment is a modification of the first embodiment, and is different from the first embodiment in that the side walls of the respective communication pipes 6 are integrally connected to each other by plate-like ribs 64 extending in the axial direction. Thereby, the bending strength of each communicating pipe 6 is improved, and stable piercing insertion into the ink storage body 3 is obtained. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

図８に他の連通管６の例を示す。
これは、連通管６の各々の側壁を互いに連結した別の例である。即ち、この例では、１本の筒状体の内部を長手方向に延びる仕切壁により区画した構成、あるいは、別の言い方をすれば、横断面半月状の２本の連通管６を横断面円形状になるように一体に連結した構成である。それにより、筒状体の内部に横断面半月状の２本の流通路６２が独立して並列に設けられる。 FIG. 8 shows another example of the communication pipe 6.
This is another example in which the side walls of the communication pipe 6 are connected to each other. In other words, in this example, the inside of one cylindrical body is partitioned by a partition wall extending in the longitudinal direction, or in other words, the two communication pipes 6 having a semicircular cross section are formed into a circular cross section. It is the structure connected integrally so that it may become a shape. As a result, two flow passages 62 having a half-moon cross section are independently provided in parallel inside the cylindrical body.

図９に他の連通管６の例を示す。
これは、大径の連通管６ａの内部に小径の連通管６ｂを配置した構成の例である。この例では、大径の連通管６ａの内周面と小径の連通管６ｂの外周面との間に横断面環状の流通路６２が形成され、小径の連通管６ｂの内部に横断面円形状の流通路６２が形成される。 FIG. 9 shows another example of the communication pipe 6.
This is an example of a configuration in which a small-diameter communication pipe 6b is disposed inside a large-diameter communication pipe 6a. In this example, an annular flow passage 62 is formed between the inner peripheral surface of the large-diameter communication pipe 6a and the outer peripheral surface of the small-diameter communication pipe 6b, and a circular cross-section is formed inside the small-diameter communication pipe 6b. The flow path 62 is formed.

（第６実施例）
図１０に第６実施例を示す。
本実施例は、第１実施例の変形例であり、第１実施例と異なる点は、連通管６の各々の前端が軸線に対して垂直面である点にある。尚、前記以外の構成は、第１実施例と同様の構成であるため説明を省略する。 (Sixth embodiment)
FIG. 10 shows a sixth embodiment.
This embodiment is a modification of the first embodiment, and is different from the first embodiment in that each front end of the communication pipe 6 is a plane perpendicular to the axis. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

（第７実施例）
図１１に第７実施例を示す。
本実施例は、第１実施例の変形例であり、第１実施例と異なる点は、連通管６の各々の前端が軸線に対して垂直面である点と、連通管６の各々の前端が、軸方向前方に開口せず、複数の窓孔６５により径方向外方に開口している点にある。尚、前記以外の構成は、第１実施例と同様の構成であるため説明を省略する。 (Seventh embodiment)
FIG. 11 shows a seventh embodiment.
The present embodiment is a modification of the first embodiment, and is different from the first embodiment in that each front end of the communication pipe 6 is a plane perpendicular to the axis and each front end of the communication pipe 6. However, they are not opened forward in the axial direction, but are opened radially outward by the plurality of window holes 65. Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

（第８実施例）
図１２に第８実施例を示す。
本実施例は、第１実施例の変形例であり、第１実施例と異なる点は、連通管６の各々の前端が軸線に対して垂直面である点と、インキ吸蔵体３の軸心の貫通孔にペン先２の後部が圧入され、ペン先２の後端がインキ吸蔵体３の内部後方（インキ吸蔵体３の後半部の内部）に位置している点にある。尚、前記以外の構成は、第１実施例と同様の構成であるため説明を省略する。 (Eighth embodiment)
FIG. 12 shows an eighth embodiment.
The present embodiment is a modification of the first embodiment, and is different from the first embodiment in that each front end of the communication pipe 6 is a plane perpendicular to the axis and the axis of the ink occlusion body 3. The rear end of the pen tip 2 is press-fitted into the through-hole, and the rear end of the pen tip 2 is located behind the ink storage body 3 (in the rear half of the ink storage body 3). Since the configuration other than the above is the same as that of the first embodiment, the description thereof will be omitted.

本発明の第１実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 1st Example of this invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明の第２実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 2nd Example of this invention. 本発明の第３実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 3rd Example of this invention. 本発明の第４実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 4th Example of this invention. 本発明の第５実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 5th Example of this invention. 図６のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 他の連通管の例を示す横断面図である。It is a cross-sectional view showing an example of another communication pipe. 他の連通管の例を示す横断面図である。It is a cross-sectional view showing an example of another communication pipe. 本発明の第６実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 6th Example of this invention. 本発明の第７実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 7th Example of this invention. 本発明の第８実施例のペン先下向き状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip downward state of 8th Example of this invention.

符号の説明Explanation of symbols

１ 直液式筆記具
２ ペン先
２１ 環状溝
２２ ボール
２３ ホルダー
２４ インキ誘導部材
３ インキ吸蔵体
３１ 高密度部
３２ 低密度部
４ 先部材
４１ 小径部
４２ 大径部
４３ リブ
４３ａ 規制壁部
４３ｂ 係止凸部
４４ 空気孔
５ 中間部材
５１ 前方筒部
５２ 隔壁
５２ａ 取付孔
５２ｂ 環状凸部
５３ 後方筒部
６ 連通管
６１ 傾斜カット面
６２ 流通路
６３ インキ吸収体
６４ リブ
６５ 窓孔
６ａ 大径の連通管
６ｂ 小径の連通管
７ インキタンク
８ インキ
９ 隙間
１０ 空気通路
Ｌ インキ吸蔵体全体の軸方向の長さ
Ｓ１，Ｓ２ インキ吸蔵体の前端から連通管の前端までの軸方向の距離
Ｔ１，Ｔ２ 連通管の前端とペン先の後端との軸方向の距離 DESCRIPTION OF SYMBOLS 1 Direct liquid type writing instrument 2 Pen tip 21 Annular groove 22 Ball 23 Holder 24 Ink guide member 3 Ink occlusion body 31 High density part 32 Low density part 4 Tip member 41 Small diameter part 42 Large diameter part 43 Rib 43a Restriction wall part 43b Locking Convex part 44 Air hole 5 Intermediate member 51 Front cylinder part 52 Partition wall 52a Mounting hole 52b Annular convex part 53 Rear cylinder part 6 Communication pipe 61 Inclined cut surface 62 Flow path 63 Ink absorber 64 Rib 65 Window hole 6a Large diameter communication pipe 6b Small-diameter communication pipe 7 Ink tank 8 Ink 9 Clearance 10 Air passage L Axial length S1, S2 of the entire ink storage body Axial distances T1, T2 from the front end of the ink storage body to the front end of the communication pipe The axial distance between the front edge of the pen and the rear edge of the nib

Claims (17)

ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部に位置されてなることを特徴とする直液式筆記具。 A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being positioned inside the ink occlusion body. A direct liquid writing instrument. ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部に位置され、前記連通管の各々の前端の軸方向の位置が互いに等しく設定されてなることを特徴とする直液式筆記具。 A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A plurality of the communication pipes, the front ends of the communication pipes are opened, and the front ends of the communication pipes are located inside the ink occlusion body, A direct liquid writing instrument, wherein the axial positions of the front ends of the communicating pipes are set equal to each other. ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部のペン先後端近傍に位置されてなることを特徴とする直液式筆記具。 A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being a pen tip rear end inside the ink occlusion body A direct liquid writing instrument characterized by being located in the vicinity. ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端がインキ吸蔵体内部のペン先後端近傍に位置され、前記連通管の各々の前端の軸方向の位置が互いに等しく設定されてなることを特徴とする直液式筆記具。 A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being a pen tip rear end inside the ink occlusion body A direct liquid writing instrument, wherein the direct liquid writing instrument is located in the vicinity, and the axial positions of the front ends of the communicating pipes are set to be equal to each other. ペン先と、前記ペン先の後端に接続されるインキ吸蔵体と、前記インキ吸蔵体の後方に配置され、インキを直に貯溜するインキタンクと、前記インキタンクと前記インキ吸蔵体との間を接続する連通管とからなる直液式筆記具であって、前記連通管を複数備え、前記連通管の各々の前端が開口され、前記連通管の各々の前端が前記インキ吸蔵体の内部前方に位置し、前記ペン先の後端が前記インキ吸蔵体の内部前方に位置してなることを特徴とする直液式筆記具。 A pen tip, an ink occlusion body connected to the rear end of the pen nib, an ink tank that is disposed behind the ink occlusion body and directly stores ink, and between the ink tank and the ink occlusion body A direct liquid type writing instrument comprising a plurality of the communication pipes, each front end of the communication pipe being opened, and each front end of the communication pipe being in front of the interior of the ink occlusion body. A direct liquid writing instrument, wherein the pen tip is located at the rear end of the pen tip. 前記ペン先の後端と前記連通管の各々の前端との間は、前記インキ吸蔵体を介してインキ流通可能に接続される請求項１乃至５のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 5, wherein a rear end of the nib and a front end of each of the communication pipes are connected to each other through the ink occlusion body so that ink can be distributed. 前記連通管の各々の前端をインキ吸蔵体の後端から前方に挿入し、インキ吸蔵体の内部を前方に押圧圧縮することによって、前記連通管の各々の前端近傍のインキ吸蔵体の密度を、前記連通管の各々の前端近傍以外の部分のインキ吸蔵体の密度よりも高く設定した請求項１乃至６のいずれかに記載の直液式筆記具。 By inserting the front end of each of the communication pipes forward from the rear end of the ink storage body and pressing and compressing the inside of the ink storage body forward, the density of the ink storage bodies near the front end of each of the communication pipes is reduced. The direct liquid writing instrument according to any one of claims 1 to 6, which is set to be higher than the density of the ink occlusion body in a portion other than the vicinity of the front end of each of the communication pipes. 前記連通管の各々の前端近傍以外のインキ吸蔵体の空隙率が７０％〜９５％であり、前記連通管の各々の前端近傍以外のインキ吸蔵体の空隙率と、前記連通管の各々の前端近傍のインキ吸蔵体の空隙率との差が７％以上である請求項７記載の直液式筆記具。 The porosity of the ink occlusion body other than the vicinity of the front end of each of the communication pipes is 70% to 95%, the porosity of the ink occlusion body other than the vicinity of the front end of each of the communication pipes, and the front end of each of the communication pipes 8. The direct liquid writing instrument according to claim 7, wherein a difference from the porosity of the ink occlusion body in the vicinity is 7% or more. 前記連通管の各々の前端を先鋭形状とした請求項７記載の直液式筆記具。 The direct liquid writing instrument according to claim 7, wherein the front end of each of the communication pipes has a sharp shape. 前記連通管の各々の前端がその前端開口部を含む傾斜カット面からなる請求項９記載の直液式筆記具。 The direct liquid writing instrument according to claim 9, wherein the front end of each of the communication pipes comprises an inclined cut surface including a front end opening. 前記インキ吸蔵体の前端から前記連通管の各々の前端までの軸方向の距離が、前記インキ吸蔵体全体の軸方向の長さの３％以上５０％以下に設定される請求項１乃至１０のいずれかに記載の直液式筆記具。 11. The axial distance from the front end of the ink occluding body to the front end of each of the communication pipes is set to 3% or more and 50% or less of the axial length of the entire ink occluding body. The direct liquid writing instrument according to any one of the above. 前記インキ吸蔵体の前端から前記連通管の各々の前端までの軸方向の距離が等しく設定される請求項１乃至１１のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 11, wherein an axial distance from a front end of the ink occlusion body to each front end of the communication pipe is set to be equal. 前記連通管の各々の前端と前記ペン先の後端との軸方向の距離が１０ｍｍ以内に設定される請求項１乃至１２のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 12, wherein an axial distance between a front end of each of the communication pipes and a rear end of the pen tip is set within 10 mm. 前記連通管の各々の前端と前記ペン先の後端との間の間隔が等しく設定される請求項１乃至１３のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 13, wherein an interval between a front end of each of the communication pipes and a rear end of the nib is set to be equal. 前記インキ吸蔵体の前端面及び後端面が外気と連通される請求項１乃至１４のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 14, wherein a front end surface and a rear end surface of the ink occlusion body are communicated with outside air. 前記連通管の各々の内部に、毛細間隙を備えたインキ吸収体を配置した請求項１乃至１５のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 15, wherein an ink absorber having a capillary gap is disposed inside each of the communication pipes. 前記連通管の各々の側壁を互いに連結した請求項１乃至１６のいずれかに記載の直液式筆記具。 The direct liquid writing instrument according to any one of claims 1 to 16, wherein the side walls of the communication pipe are connected to each other.
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JP4848067B2 (en) * 2007-02-19 2011-12-28 パイロットインキ株式会社 Direct liquid writing instrument
JP5085952B2 (en) * 2007-02-19 2012-11-28 パイロットインキ株式会社 Direct liquid writing instrument
JP4943950B2 (en) * 2007-06-21 2012-05-30 パイロットインキ株式会社 Direct liquid writing instrument
JP4943951B2 (en) * 2007-06-21 2012-05-30 パイロットインキ株式会社 Direct liquid writing instrument
JP4943956B2 (en) * 2007-06-29 2012-05-30 パイロットインキ株式会社 Direct liquid writing instrument
JP5244006B2 (en) * 2009-03-26 2013-07-24 シヤチハタ株式会社 Direct liquid writing instrument
JP7118814B2 (en) * 2018-08-30 2022-08-16 株式会社パイロットコーポレーション ballpoint pen

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