JP2005178304A

JP2005178304A - Pressurizing type writing implement

Info

Publication number: JP2005178304A
Application number: JP2003426065A
Authority: JP
Inventors: Seiichi Kobayashi; 小林　　清一
Original assignee: Mitsubishi Pencil Co Ltd
Current assignee: Mitsubishi Pencil Co Ltd
Priority date: 2003-12-24
Filing date: 2003-12-24
Publication date: 2005-07-07

Abstract

<P>PROBLEM TO BE SOLVED: To improve a pressurizing effect by pressurizing by advancing a pushing body and by making the pressure same as the open air by retreating. <P>SOLUTION: A pressurizing type writing implement is provided with a pumping type pressurizing mechanism part behind an ink storing pipe. In the pressurizing mechanism part, the pushing body is provided under a condition where the pushing body is always energized backward to the ink storing pipe through a spring, and a cylindrical recessed part is formed at a front shaft part of the pushing body. In addition, a vent channel communicated from the bottom face of the recessed part to the front end face is formed, and a seal ring is tightly inserted into the recessed part so as to be slid forward and backward. When the pushing body is actuated forward, the seal ring approaches the back end side of the recessed part to make the front and back part of the seal ring impossible to vent, and by forwarding furthermore, the outer peripheral part of the seal ring is tightly slid on the inner peripheral part of an ink storing pipe to press the back end of a follower. In addition, when the pushing body is retreated, the seal ring approaches the front end side of the recessed part, and the front and back parts of the seal ring becomes to a condition where the front and back parts are communicated by the vent channel, and it is possible for the pushing body to retreat under a condition where the back end of the follower is communicated with the open air. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、筆記先端部の後方にインキ収容管を備え、インキ収容管にインキとインキの後端にインキの消耗と共に追随するフォロアが配設され、更にフォロアの後方にポンピング式の加圧機構部が設けられた筆記具の改良に関する。 The present invention comprises an ink storage tube behind the writing tip, the ink storage tube is provided with ink and a follower that follows the ink at the rear end thereof, and a pumping type pressurizing mechanism behind the follower. The present invention relates to an improvement of a writing instrument provided with a section.

特開平８−５２４０７JP-A-8-52407 特表平７−５０６８６２7-506862 特開２００１−１５０８６５JP 2001-150865 A 特開２００１−１２１８８５従来、誤記等を修正するために白色顔料を用いた液体塗布具が知られている。また、白色顔料と溶剤が分離しやすい為にこの種の液体塗布具は可撓性のある容器にインキとボール等が封入されており、使用に際して振って攪拌する必要がある。また、インキを吐出する為に容器の側面を押圧して行うが、インキ残量が少なくなった時には容器の側壁を強く押してもインキが吐出されないという苛立たしさがある。（特許文献１）また、剪断減粘性を有するインキを使用して、攪拌しないですむものも知られているが、上向きで塗布したときにインキが逆流してインキ切れしやすい問題が存在する。（特許文献２）また、軸筒の後端にポンピング式の加圧機構部が設けられ、更にその前方で且つインキの後端に接触してインキの消耗と共に追随するよう配設されたフォロアの後端に位置して弁機構が配設され、加圧機構部の前進作動によって軸筒の後端孔に空気が押し込まれて、その際に所定圧で弁が開いてフォロアの後端が加圧されることによってインキのチップ側への流動性が支援されるように構成されたものが提案されている。（特許文献３）しかしながら、このものは構造が複雑であり、コスト高となる欠点がある。また、非使用時に加圧状態のままにあるので内圧が設定値を越えた状態となっていた場合、不用意にインキが吹出るという問題の配慮が必要となる問題が存在する。また、軸筒の後端にポンピング式の加圧機構部が設けられて、そのポンピングの前進作動によってボールペンリフィールの後端孔に空気が押し込まれてフォロアの後端が加圧され、インキのチップ側への流動性が支援されるように構成された本発明の改良の元となるものが提案されている。（特許文献４）このものは、押し体の前進を解除すると後退して外気と同じになるので加圧効果が持続しない欠点がある。また、加圧した状態から減圧の影響を有して後退するので加圧効果が十分でない問題がある。JP, 2001-121885, A Conventionally, the liquid applicator using a white pigment in order to correct mistakes etc. is known. In addition, since the white pigment and the solvent can be easily separated, this type of liquid applicator has a flexible container filled with ink, balls, and the like, and needs to be shaken and stirred in use. Further, the ink is ejected by pressing the side surface of the container. However, when the remaining amount of ink decreases, there is annoyance that the ink is not ejected even if the side wall of the container is strongly pressed. (Patent Document 1) In addition, there is a known ink that does not need to be agitated by using ink having shear thinning viscosity, but there is a problem that the ink tends to run out of ink when applied upward. (Patent Document 2) Further, a pumping-type pressurizing mechanism portion is provided at the rear end of the shaft cylinder, and a follower arranged to follow the ink exhaustion in front of it and in contact with the rear end of the ink. A valve mechanism is disposed at the rear end, and air is pushed into the rear end hole of the shaft cylinder by the forward movement of the pressurizing mechanism, and at that time, the valve opens at a predetermined pressure and the rear end of the follower is added. There has been proposed one configured to support the fluidity of the ink toward the tip side by being pressed. However, this has a drawback that the structure is complicated and the cost is high. Further, since the pressure is maintained when not in use, there is a problem that requires consideration of the problem that the ink is inadvertently blown out when the internal pressure exceeds the set value. Also, a pumping type pressurizing mechanism is provided at the rear end of the shaft cylinder, and air is pushed into the rear end hole of the ballpoint pen refill by the pumping forward operation to pressurize the rear end of the follower, and the ink tip A basis for the improvement of the present invention, which is configured to support fluidity to the side, has been proposed. (Patent Document 4) This is disadvantageous in that the pressurizing effect is not sustained because the pusher moves backward to become the same as the outside air when the pusher is released. In addition, there is a problem that the pressurizing effect is not sufficient because the pressure is retreated from the pressurized state with the influence of pressure reduction.

一般に粘性の低いインキまたは剪断減粘性を有したインキを使用したボールペンは、インキの流出量が多く（筆記濃度を上げるため）インキ収容管の径を太くしてインキの搭載量を多くしている。また、インキの粘度は油性ボールペンのインキに比べて小さいのでインキ収容管に対する流動抵抗は小さい。従って、インキの自重や落下あるいはノック衝撃が加わることによりインキ漏れ（インキ収容管の後端にインキが逆流する）が生じやすい。その為に、通常はインキの後端に筆記時のインキの消耗に追随して移動するが、インキの自重や衝撃に対してインキの逆流を抑制するグリース状のフォロアが、また、必要によりフォロア棒がフォロア内に浸漬されて設けられている。しかしながら、フォロアを設けても上向き筆記をした時にはチップのボール背面のインキが無くなると、インキのヘッドが直に加わる為に顕著な逆流が生じて手や衣服を汚す危険がある。また、インキの粘度が低く流出量が多いが故に、チップ側を下向きにした場合に先端ボールとチップ抱持部の隙間が生じるとインキが滲みでる（直流）問題が存在する。
特に、誤記等を修正するために白色顔料を用いた液体塗布具の場合には、インキの流量を多くすることや、乾燥による目詰まり排除などの理由で、筆圧によって先端ボールが後退する寸法が大きくとってあり、先端ボールの周面とチップのボール抱持部の内面との間の隙間が大きい。 In general, ballpoint pens that use low viscosity ink or ink with shear thinning viscosity have a large ink outflow (to increase the writing density), and the diameter of the ink containing tube is increased to increase the amount of ink loaded. . Further, since the viscosity of the ink is smaller than that of the oil-based ballpoint pen, the flow resistance with respect to the ink containing tube is small. Therefore, ink leakage (ink flows backward at the rear end of the ink containing tube) is likely to occur due to the weight of the ink, dropping or knocking impact. For this purpose, the ink usually moves following the ink consumption at the time of writing at the trailing edge of the ink, but a grease-like follower that suppresses the back flow of the ink against the ink's own weight or impact is also available. A rod is provided immersed in the follower. However, even if the follower is provided, when writing is performed upward, if the ink on the back side of the ball of the chip runs out, the ink head is added directly, so that there is a risk of causing a significant back flow and soiling hands and clothes. In addition, since the viscosity of the ink is low and the amount of outflow is large, there is a problem that the ink oozes out (direct current) when a gap is formed between the tip ball and the tip holding portion when the tip side is faced downward.
In particular, in the case of liquid applicators that use white pigments to correct errors, etc., the size that the tip ball retracts due to pen pressure due to reasons such as increasing the ink flow rate and eliminating clogging due to drying. The clearance between the peripheral surface of the tip ball and the inner surface of the ball holding portion of the chip is large.

本発明は、初期筆記でインキがとぎれやすいインキを使用したボールペン、インキに種々のフィラーが混入されたボールペン、紙面に筆記した筆跡が消しゴムでの擦過により容易に消去できるインキが充填されたボールペン、誤記等を白色のインキで隠蔽することで修正可能とするボールペンなどを加圧効果に優れた加圧作用で支援して筆記可能とする。また、適正な加圧力を容易に設定可能とし、ボールペンの未使用時に於いて、不用意に筆記先端部に外力が懸かってもインキが吹出る問題を回避可能とする。また、誤字修正用のボールペンの場合、酸化チタン、高分子中空微粒子等の白色顔料とゲル化剤を含み、顔料の沈降が防止されると共に流動性が損なわれないように配合された白色顔料インキと、ポンピングによる加圧機構を設けることによって、白色顔料と溶剤とが分離するような問題がなく、従ってインキを攪拌する必要がなく、筆記に際して容器の側面を押圧するようなこともない使い勝手の良い加圧式のボールペンを提供可能とする。 The present invention is a ballpoint pen that uses ink that is easy to break ink in the initial writing, a ballpoint pen in which various fillers are mixed in the ink, a ballpoint pen that is filled with ink that can be easily erased by rubbing the handwriting written on the paper with an eraser, A ballpoint pen that can be corrected by concealing misprints etc. with white ink is supported by a pressurizing action excellent in pressurizing effect, and can be written. In addition, it is possible to easily set an appropriate pressure, and when the ballpoint pen is not used, it is possible to avoid the problem that ink is blown out even if an external force is inadvertently applied to the writing tip. In addition, in the case of ballpoint pens for correcting typographical errors, white pigment inks that contain white pigments such as titanium oxide and polymer hollow fine particles and gelling agents, and are formulated so that pigment settling is prevented and fluidity is not impaired. By providing a pressurizing mechanism by pumping, there is no problem that the white pigment and the solvent are separated, so there is no need to stir the ink, and there is no need to press the side of the container during writing. A good pressure ballpoint pen can be provided.

また、先端に連続気孔を有した多孔質体、軸方向に複雑な毛細管が形成されて成る所謂プラ芯、繊維集合体、などからなるペン芯をペン先としたサインペン、マーカー等の筆記具に於いて、紙面に筆記した筆跡が消しゴムでの擦過により容易に消去できるインキ、誤記等を白色で隠蔽する所謂修正インキ、メタリックカラーインキ、ラメを配したインキ、パール調インキ、筆記描線の乾燥が極めて速いインキなどのように、顔料粒子、高分子粒子、金属粉、金属箔、雲母などをインキ中に含み、高固形分濃度で粘度が高く、剪断減粘性を有するインキ、などのインキを使用可能とし、インキの粘度が所定以上に高かったり、あるいは着色微粒子が所定以上に大きい場合であってもペン先が詰まって筆記不可となる問題を回避可能とする。 In addition, in a writing instrument such as a sign pen, a marker, etc. with a pen core composed of a porous body having continuous pores at the tip, a so-called plastic core formed by a complicated capillary tube in the axial direction, a fiber assembly, etc. The ink written on the paper can be easily erased by rubbing with an eraser, so-called correction ink that conceals misprints etc. in white, metallic color ink, ink with lame, pearl ink, extremely dry writing lines Like fast ink, pigment ink, polymer particles, metal powder, metal foil, mica, etc. are included in the ink, and ink such as ink with high solid content concentration, high viscosity and shear thinning can be used. Thus, even when the viscosity of the ink is higher than a predetermined value or the colored fine particles are larger than a predetermined value, the problem that the pen tip is clogged and writing is impossible can be avoided.

本発明は、上記課題を達成する為に以下の構成を有する。
請求項１に記載の発明に係る加圧式の筆記具は、インキ収容管にインキとそのインキの後端にインキの蒸発を防止し且つインキの消耗と共にインキに追随するフォロアが配設され、そのインキ収容管の後方にポンピング式の加圧機構部が設けられて、そのポンピングの前進作動によってインキ収容管の後端孔に空気が押し込まれてフォロアの後端が加圧されるように構成された加圧式の筆記具に於いて、ポンピング式の加圧機構部は、スプリングを介し、押し体がインキ収容管に対して常に後方に附勢された状態に設けられ、押し体の前方軸部に円周状の凹部が形成されて、更に凹部の底面から前端面に連通した通気溝が形成され、また凹部にシールリングが前後に摺動するように密挿され、押し体を前進作動した時にシールリングが凹部の後端側に寄ってシールリングの前後部が通気不可となり、更なる前進でシールリングの外周部がインキ収容管の内周部を密接状に摺動してフォロアの後端が加圧され、また押し体を後退した時にシールリングが凹部の前端側に寄ってシールリングの前後部が前記通気溝によって連通した状態となり、フォロアの後端が外気と連通した状態で押し体が後退可能となる。 The present invention has the following configuration in order to achieve the above-described problems.
According to a first aspect of the present invention, there is provided a pressure-type writing instrument in which an ink and a follower for preventing ink evaporation at the rear end of the ink and following the ink as the ink is consumed are disposed in the ink storage tube. A pumping-type pressurizing mechanism is provided behind the storage tube, and the rear end of the ink storage tube is pressed by the forward movement of the pumping to pressurize the rear end of the follower. In the pressure-type writing instrument, the pumping-type pressure mechanism is provided in a state in which the pressing body is always urged rearward with respect to the ink containing tube via a spring, and a circle is formed on the front shaft portion of the pressing body. A circumferential recess is formed, and a ventilation groove communicating from the bottom surface of the recess to the front end surface is formed. Further, the seal ring is inserted into the recess so as to slide back and forth, and the seal is sealed when the push body is moved forward. The ring is recessed Near the rear end, the front and rear parts of the seal ring cannot be ventilated, and further advancement causes the outer periphery of the seal ring to slide in close contact with the inner periphery of the ink containing tube, and the rear end of the follower is pressurized. Further, when the push body is retracted, the seal ring approaches the front end side of the recess, and the front and rear portions of the seal ring are communicated with each other through the ventilation groove, and the push body can be retracted with the rear end of the follower communicating with the outside air. .

請求項２に記載の発明に係る加圧式の筆記具は、請求項１に記載の加圧式の筆記具に於いて、押し体を前進作動して、フォロアの後端が加圧された状態で押し体の後退を阻止するようにロック装置が設けられてなる。 A pressure-type writing instrument according to a second aspect of the present invention is the pressure-type writing instrument according to the first aspect, wherein the pressing body is moved forward and the rear end of the follower is pressurized. A locking device is provided so as to prevent the retraction of the motor.

本発明は、初期筆記でインキがとぎれやすいインキを使用したボールペン、インキに種々のフィラーが混入されたボールペン、紙面に筆記した筆跡が消しゴムでの擦過により容易に消去できるインキが充填されたボールペン、誤記等を白色のインキで隠蔽することで修正可能とするボールペンなどに於いて、押し体の前進を解除すると加圧した状態から減圧の影響を受けずに押し体が後退し、フォロアの後端が外気と同じになるので、加圧効果が持続し、加圧した状態から減圧の影響を受けずに持続的な加圧効果が期待できる。 The present invention is a ballpoint pen that uses ink that is easy to break ink in the initial writing, a ballpoint pen in which various fillers are mixed in the ink, a ballpoint pen that is filled with ink that can be easily erased by rubbing the handwriting written on the paper with an eraser, For ballpoint pens that can be corrected by concealing errors with white ink, when the pusher's advance is released, the pusher moves backward from the pressurized state without being affected by the reduced pressure, and the rear end of the follower Since it becomes the same as outside air, the pressurizing effect is sustained, and a sustained pressurizing effect can be expected from the pressurized state without being affected by the reduced pressure.

また、先端に連続気孔を有した多孔質体、軸方向に複雑な毛細管が形成されて成る所謂プラ芯、繊維集合体、などからなるペン芯をペン先としたサインペン、マーカー等の筆記具に於いて、紙面に筆記した筆跡が消しゴムでの擦過により容易に消去できるインキ、誤記等を白色で隠蔽する所謂修正インキ、メタリックカラーインキ、ラメを配したインキ、パール調インキ、筆記描線の乾燥が極めて速いインキなどのように、顔料粒子、高分子粒子、金属粉、金属箔、雲母などをインキ中に含み、高固形分濃度で粘度が高く、剪断減粘性を有するインキ、などのインキを使用可能とし、インキの粘度が所定以上に高かったり、あるいは着色微粒子が所定以上に大きい場合であってもペン先が詰まって筆記不可となる問題が回避可能となる。 In addition, in a writing instrument such as a sign pen, a marker, etc. with a pen core composed of a porous body having continuous pores at the tip, a so-called plastic core formed by a complicated capillary tube in the axial direction, a fiber assembly, etc. The ink written on the paper can be easily erased by rubbing with an eraser, so-called correction ink that conceals misprints etc. in white, metallic color ink, ink with lame, pearl ink, extremely dry writing lines Like fast ink, pigment ink, polymer particles, metal powder, metal foil, mica, etc. are included in the ink, and ink such as ink with high solid content concentration, high viscosity and shear thinning can be used. Thus, even when the viscosity of the ink is higher than a predetermined value or the colored fine particles are larger than a predetermined value, the problem that the pen tip is clogged and writing is impossible can be avoided.

図１乃至図７は本発明の加圧式の筆記具で、筆記先端部がボールペンチップで、誤記等を白色のインキで隠蔽することで修正可能とするボールペンの実施例を示している。
先ず、図１に示すボールペンリフィール１のインキ収容管２内には白色顔料インキ９が充填され、そのインキの後端にインキの消耗と共にインキと追随するグリース状のフォロア１０が充填されている。また、フォロアはインキと相溶性が無く又インキの蒸発を防止する性能を有している。また、必要に応じてフォロア内にフォロアと略同等の比重を有する樹脂製のフォロア棒１１が浸漬される。尚、フォロアは例えばシリコンゴム等の追従体とすることも可能である。 FIG. 1 to FIG. 7 show an embodiment of a ballpoint pen which is a pressure-type writing instrument according to the present invention, in which the tip of writing is a ball-point pen tip and correction can be made by concealing misprints with white ink.
First, a white pigment ink 9 is filled in the ink containing tube 2 of the ballpoint pen refill 1 shown in FIG. 1, and a grease-like follower 10 that follows the ink as it is consumed is filled at the rear end of the ink. Further, the follower is not compatible with ink and has a performance of preventing ink evaporation. Moreover, the resin-made follower stick | rod 11 which has specific gravity substantially equivalent to a follower is immersed in a follower as needed. The follower may be a follower such as silicon rubber.

また、白色顔料インキ９は、少なくとも酸化チタン、高分子中空微粒子等の白色顔料とゲル化剤を含み、顔料の沈降が防止されると共に流動性が極力損なわれないように配合された白色顔料インキである。また、インキは剪断減粘性を有しているので先端ボールの回転で粘度が低下するのと相まって隠蔽性の高い塗布が可能である。 The white pigment ink 9 contains at least a white pigment such as titanium oxide and polymer hollow fine particles and a gelling agent, and is mixed so that the precipitation of the pigment is prevented and the fluidity is not impaired as much as possible. It is. In addition, since the ink has shear thinning viscosity, it can be applied with high concealability in combination with a decrease in viscosity due to rotation of the tip ball.

また、図に示すように継ぎ手４は鍔部４ｂの前方に前軸部４ａが、後方に後軸部４ｃが形成され、前軸部４ａ先端のチップ嵌着孔４ｄに先端ボール６を抱持したチップ３の軸部３ｂが固着されている。
また、前軸部４ａ外周の所用箇所にリブ４ｅが形成されている。 Further, as shown in the figure, the joint 4 has a front shaft portion 4a formed in front of the flange portion 4b and a rear shaft portion 4c formed in the rear, and the tip ball 6 is held in the tip fitting hole 4d at the front end of the front shaft portion 4a. The shaft portion 3b of the chip 3 is fixed.
Moreover, the rib 4e is formed in the required location of the front shaft part 4a outer periphery.

また、チップ３はインキ流入可能なチャンネルを有した座に先端ボール６が略当接した状態で、先端ボール６が回転自在に抱持されるようカシメられている。また、チップ３の内孔部にスプリング７が内挿され、チップの軸部３ｂの後端が適宜カシメられてスプリング７の後端が抜出不能となされている。 The tip 3 is crimped so that the tip ball 6 is rotatably held in a state where the tip ball 6 is substantially in contact with a seat having a channel through which ink can flow. Further, the spring 7 is inserted into the inner hole portion of the tip 3, and the rear end of the shaft portion 3b of the tip is properly crimped so that the rear end of the spring 7 cannot be pulled out.

また、スプリング７の先方には直線状の棒軸部７ａが形成され、当該棒軸部７ａの先端が先端ボール６の背面に押圧状に当接する。尚、先端ボール６はその押圧でチップ３のボール抱持部３ａ（カシメ等で形成）の内縁に密接状態と成されている。尚、スプリングの前面に先端ボール６の背面を押圧する押し部材を設けることも、又、上記棒軸部を極細巻きのコイル状となすことも可能である。
また更に、チップを耐磨耗性やインキのシール性能に優れた樹脂成型品となして、先端ボールの背面を押圧するバネ座を一体又は別体のバネ座を設けて構成することも可能である。 Further, a linear rod shaft portion 7 a is formed at the tip of the spring 7, and the tip of the rod shaft portion 7 a abuts against the back surface of the tip ball 6 in a pressing manner. The tip ball 6 is in close contact with the inner edge of the ball holding portion 3a (formed by caulking or the like) of the chip 3 by the pressing. In addition, it is possible to provide a pressing member for pressing the back surface of the tip ball 6 on the front surface of the spring, and it is also possible to form the rod shaft portion in an extremely thin coil shape.
Furthermore, the tip can be made of a resin molded product with excellent wear resistance and ink sealing performance, and the spring seat that presses the back of the tip ball can be configured as an integral or separate spring seat. is there.

また、先端ボール６がボール抱持部３ａの内面に密接することはインキが高粘度であっても筆記先端の乾燥、インキの直流防止に対し極めて重要である。
即ち、本願のような誤記修正塗布用のボールペンはインキの吐出量を多くする為に、筆記用のボールペンに比較して先端ボールの後退する寸法を大きく設定されている。また、先端ボール６を抱持するチップ内面の表面粗さ、カシメによる密接精度を改善する為に内面の研削仕上げ、カシメ精度を上げる為の二次的な塑性加工が配慮される。また、必要によっては先端ボールとの密接面に表面処理などが配慮される。 Further, it is extremely important for the tip ball 6 to be in close contact with the inner surface of the ball holding portion 3a for drying the writing tip and preventing direct current of the ink even if the ink has high viscosity.
That is, in order to increase the amount of ink discharged, the error correction coating ballpoint pen as in the present application is set to have a larger size in which the tip ball retracts than the writing ballpoint pen. Further, in order to improve the surface roughness of the inner surface of the chip holding the tip ball 6 and the tightness accuracy by caulking, the inner surface is ground and the secondary plastic processing for increasing the caulking accuracy is considered. In addition, surface treatment or the like is considered on the contact surface with the tip ball if necessary.

また、上記チップ嵌着孔４ｄの後方にチップ３の軸心と適宜偏心させた弁室５が設けられ、弁室５の後部には導孔５ｂに連通してテーパー状または球面状の弁体受け座５ａが形成されている。また、弁室５の内壁の一側にはインキが流入可能な溝部５ｃが形成されている。また、弁室５内には球状の弁体８が遊嵌されて、チップ３を下向きにした状態で弁体８がチップの軸部３ｂの後端に偏倚した状態に当接して、上記溝部５ｃ等を通じて導孔５ｂから流入したインキがチップ内孔部に流入するように構成されている。
尚、弁体は弁体受け座に密接する側をテーパー状又は球面状に成した軸状体とすることも可能である。また、その際にはチップの軸部後端に当接する側の周面にチップ内にインキが流入する溝を形成することで弁室を上記のようにチップ軸心に対し偏心させる必要はない。 Further, a valve chamber 5 that is appropriately decentered from the axis of the tip 3 is provided behind the tip fitting hole 4d, and a tapered or spherical valve body that communicates with the guide hole 5b at the rear portion of the valve chamber 5. A receiving seat 5a is formed. Further, a groove portion 5c into which ink can flow is formed on one side of the inner wall of the valve chamber 5. In addition, a spherical valve body 8 is loosely fitted in the valve chamber 5, and the valve body 8 abuts against a state where the tip 3 is directed downward and is biased to the rear end of the shaft portion 3 b of the chip, and the groove portion The ink that has flowed in from the guide hole 5b through 5c or the like is configured to flow into the chip inner hole portion.
The valve body may be a shaft-shaped body having a tapered or spherical surface on the side close to the valve body seat. In this case, it is not necessary to decenter the valve chamber with respect to the tip axis as described above by forming a groove into which ink flows into the tip on the peripheral surface of the tip that contacts the rear end of the tip portion. .

ところで、図６はボールペンリフィールの別の実施形態を示している。上述したボールペンリフィール１との相違は弁体とフォロア棒を有さないことである。即ち、弁体とフォロア棒は必須の構成要件としないものである。
詳細については作用で後述する。 Incidentally, FIG. 6 shows another embodiment of the ballpoint pen refill. The difference from the above-described ballpoint pen refill 1 is that there is no valve body and follower rod. That is, the valve body and the follower rod are not essential constituent requirements.
Details will be described later in the operation.

また、継ぎ手４の鍔部４ｂの後方には後軸部４ｃが延設されている。後軸部４ｃの外周には筒状のインキ収容管２がその先端を鍔部４ｂの後端に当接して圧入固着されインキ収容管２の内径部が継ぎ手４の導孔５ｂに導通している。尚、上記インキ収容管２は一例として透明のＰＰ樹脂成形品等が使用される。また、上述した実施例のボールペンは継ぎ手とインキ収容管が別部材で形成されているが、両者を一体の樹脂成形品で形成することも可能である。 Further, a rear shaft portion 4 c is extended behind the flange portion 4 b of the joint 4. On the outer periphery of the rear shaft portion 4c, a cylindrical ink containing tube 2 is press-fitted and fixed with its tip abutting against the rear end of the collar portion 4b, and the inner diameter portion of the ink containing tube 2 is conducted to the guide hole 5b of the joint 4. Yes. For example, a transparent PP resin molded product or the like is used for the ink containing tube 2. Further, in the ballpoint pen of the above-described embodiment, the joint and the ink storage tube are formed as separate members, but both can be formed as an integral resin molded product.

次に、図２及び図３は、ボールペンリフィール１を軸本体に搭載した塗布具としてのボールペンの実施形態を示している。軸本体は、キャップ１７、軸筒１５、口先部１６、押し体１２を主部材として構成されている。
先ず、図に示すように軸筒１５は樹脂成形品で、その先方に口先部１６を着脱可能に有し、そのやや後方の外周に突部と溝部とより成る係合部と、係合部の後端に後述するキャップ１７の端部が当接する段部が形成されている。また、口先部１６の内孔の周面に段部１６ａが形成されている。
ボールペンリフィール１は軸筒１５の前端から嵌挿され、継ぎ手４の鍔部４ｂの後端が軸筒１５の前端に当接すると共に、軸筒の前端部外周に口先部１６が螺合等により接合され、継ぎ手４の外周に設けたリブ４ｅが上記口先部の段部１６ａに係合すると共にチップ３の先方部が口先部１６の先端孔から突出される。 Next, FIG.2 and FIG.3 has shown embodiment of the ball-point pen as an applicator which mounted the ball-point pen refill 1 in the axis | shaft main body. The shaft body includes a cap 17, a shaft tube 15, a tip 16, and a push body 12 as main members.
First, as shown in the figure, the shaft cylinder 15 is a resin molded product, and has a tip 16 detachably attached to the tip thereof, and an engaging portion composed of a protrusion and a groove on the outer periphery slightly behind, and an engaging portion. A stepped portion is formed at the rear end where the end of the cap 17 described later contacts. Further, a step portion 16 a is formed on the peripheral surface of the inner hole of the tip portion 16.
The ballpoint pen refill 1 is inserted from the front end of the shaft cylinder 15, the rear end of the flange 4b of the joint 4 abuts the front end of the shaft cylinder 15, and the tip 16 is joined to the outer periphery of the front end of the shaft cylinder by screwing or the like. The rib 4e provided on the outer periphery of the joint 4 engages with the step portion 16a of the tip portion, and the tip portion of the tip 3 protrudes from the tip hole of the tip portion 16.

一方、軸筒１５の後端には加圧機構部が設けられている。
先ず、軸筒１５の後端孔には段部１５ｃが形成されている。また、押し体１２は前方に段部１２ａを有し、その前方に鍔部１２ｂを有して、更にその前方に軸部１２ｃが設けられている。また、軸部１２ｃの前端側に孔部１２ｆが設けられ、軸部１２ｃの周面に凹部１２ｄが形成され、更に凹部１２ｄの底面の前方側から前端面にかけて連通した通気溝１２ｅが形成され、また凹部１２ｄ内に一例としてゴム等の弾性体より成るシールリング１３が密挿され、更にシールリング１３は、凹部１２ｄの底面に密着した状態で凹部内を前後方向に摺動可能となされている。
後述するが、押し体１２を前進作動した時にシールリング１３が凹部１２ｄの後端側に寄ってシールリング１３の前後部が通気不可となり、更なる前進でシールリング１３の外周部がインキ収容管２の内周部を密接状に摺動してフォロア１０の後端が加圧され、また押し体１２を後退した時にシールリング１３が凹部１２ｄの前端側に寄ってシールリング１３の前後部が前記通気溝１２ｅによって連通した状態となり、フォロア１０の後端が外気と連通した状態で押し体１２が後退可能となるように構成されている。 On the other hand, a pressure mechanism is provided at the rear end of the shaft cylinder 15.
First, a step portion 15 c is formed in the rear end hole of the shaft cylinder 15. The push body 12 has a step portion 12a in the front, a flange portion 12b in the front thereof, and a shaft portion 12c in the front thereof. Further, a hole 12f is provided on the front end side of the shaft portion 12c, a recess 12d is formed on the peripheral surface of the shaft portion 12c, and a ventilation groove 12e communicating from the front side of the bottom surface of the recess 12d to the front end surface is formed. Further, as an example, a seal ring 13 made of an elastic body such as rubber is tightly inserted into the recess 12d, and the seal ring 13 is slidable back and forth in the recess while being in close contact with the bottom surface of the recess 12d. .
As will be described later, when the pusher 12 is moved forward, the seal ring 13 approaches the rear end side of the recess 12d so that the front and rear portions of the seal ring 13 cannot be vented. 2, the rear end of the follower 10 is pressurized, and when the pusher 12 is retracted, the seal ring 13 approaches the front end side of the recess 12 d and the front and rear portions of the seal ring 13 are moved. The pusher 12 is configured to be able to move backward with the ventilation groove 12e communicating with the rear end of the follower 10 communicating with the outside air.

押し体１２は、軸筒１５の後端から挿入され、押し体の段部１２ａと軸筒の段部１５ｃの後面との間にスプリング１４が敷設されると共に鍔部１２ｂが段部１５ｃの前面に相互間の弾性変形を利用して係止され、スプリング１４によって軸筒１５に対し押し体１２は常時後方に附勢される。また、押し体の軸部１２ｃの前方がボールペンリフィールのインキ収容管２の後端孔に嵌挿し、シールリング１３の外周部がインキ収容管２の内周部に密接する。そのとき、シールリング１３は凹部１２ｄの前端側に寄っており、シールリング１３の前後部が前記通気溝１２ｅによって連通してインキ収容管２の後端孔は外気と連通している。（尚、明確に図示されていないが、軸筒１５内は外気と連通されている。その手段は容易であり、設計都合によって様々に設けられる。） The pressing body 12 is inserted from the rear end of the shaft cylinder 15, and a spring 14 is laid between the step portion 12a of the pressing body and the rear surface of the step portion 15c of the shaft cylinder, and the flange portion 12b is a front surface of the step portion 15c. The pusher 12 is always urged backward by the spring 14 with respect to the shaft cylinder 15 by utilizing elastic deformation between them. Further, the front portion of the shaft portion 12 c of the pusher body is fitted into the rear end hole of the ink storage tube 2 of the ballpoint pen refill, and the outer peripheral portion of the seal ring 13 is in close contact with the inner peripheral portion of the ink storage tube 2. At that time, the seal ring 13 is closer to the front end side of the recess 12d, the front and rear portions of the seal ring 13 communicate with each other through the ventilation groove 12e, and the rear end hole of the ink containing tube 2 communicates with the outside air. (Although not clearly shown, the inside of the shaft cylinder 15 communicates with the outside air. The means is easy and variously provided depending on the design convenience.)

また、押し体１２の段部１２ａの一側に突部１２ｇが形成され、一方、軸筒１５の後端側周面に鉤状に縦溝１５ｄと周溝１５ｅが設けられて、突部１２ｇが縦溝１５ｄに嵌挿されている。押し体１２を前進作動してフォロア１０の後端が加圧された状態で押し体１２を回動し、突部１２ｇを周溝１５ｅに係合して押し体１２の後退が阻止可能となる。
（尚、このようなロック装置は、設計都合によって様々に設けることが可能である。図４参照。） Further, a protrusion 12g is formed on one side of the stepped portion 12a of the push body 12, while a longitudinal groove 15d and a circumferential groove 15e are provided in a bowl shape on the peripheral surface of the rear end side of the shaft tube 15, and the protrusion 12g. Is inserted into the vertical groove 15d. The pusher 12 is moved forward so that the pusher 12 is rotated in a state where the rear end of the follower 10 is pressurized, and the protrusion 12g is engaged with the circumferential groove 15e to prevent the pusher 12 from retreating. .
(Such locking devices can be provided in various ways depending on the design convenience. See FIG. 4.)

図５は、上述した実施例に対してロック装置が無いものを示している。すなわち、流動しにくいインキに対し押し体のポンピング操作によって初期圧を加え、後退によって外気に連通するようになされている。 FIG. 5 shows the embodiment described above without a locking device. That is, an initial pressure is applied to the ink which does not flow easily by a pumping operation of the pressing body, and communicates with the outside air by retreating.

ところで、軸筒１５の先方に嵌着されるキャップ１７は、弾性に優れた樹脂成形品で、その外周側面にクリップ１５ｂを位置させてその後端の筒部をキャップの後端孔に圧着している。また、クリップの筒部の後端には通気孔が貫通している。また、キャップ１７の内孔後方に小室を有した筒状のインナーキャップ１７ａが設けられ、インナーキャップ１７ａはキャップ内孔部との間に所要数設けたリブで一体に接続されている。以上により、リブとリブとの間を通じてキャップ挿入口から通気孔に連通した通気路が形成されて、万一幼児がキャップを飲み込んだ際に安全な通気手段となっている。また、インナーキャップ１７ａの小室の先端には非吸液性で非連続気泡の弾性体よりなるシール栓体１８が固定されており、キャップが嵌着された時にチップ３と口先部１６の先方が小室で略密嵌されると共に、チップ先端部がシール栓体１８に密接される。 By the way, the cap 17 to be fitted to the tip of the shaft cylinder 15 is a resin molded product having excellent elasticity. The clip 15b is positioned on the outer peripheral side surface of the cap cylinder 15, and the cylinder portion at the rear end is pressure-bonded to the rear end hole of the cap. Yes. A vent hole penetrates the rear end of the cylindrical portion of the clip. Further, a cylindrical inner cap 17a having a small chamber is provided behind the inner hole of the cap 17, and the inner cap 17a is integrally connected with a required number of ribs between the cap inner hole portion. As described above, a ventilation path communicating from the cap insertion port to the ventilation hole is formed between the ribs, and serves as a safe ventilation means when an infant swallows the cap. Further, a sealing plug body 18 made of a non-liquid-absorbing non-continuous cell elastic body is fixed to the tip of the small chamber of the inner cap 17a, and when the cap is fitted, the tip of the tip 3 and the tip portion 16 is located. The tip end portion is brought into close contact with the sealing plug 18 while being closely fitted in the small chamber.

また、本発明の加圧式の筆記具は、先端に連続気孔を有した多孔質体、軸方向に複雑な毛細管が形成されて成る所謂プラ芯、繊維集合体、などからなるペン芯をペン先としたサインペンまたはマーカー等のペン芯を有し、後方のインキ収容部にインキとインキの後端にインキと追随するフォロアが配設され、更にその後方に上述したポンピング式の加圧機構が設けられてなる加圧式の筆記具を可能とする。また、筆記先端部の形態は、基本的には、通常のサインペンやマーカー等で構成される形態で対応可能である。また必要によって、ペン芯は、積極的な係止部によって先軸に固着したり、ペン芯の外周部と先軸の挿通孔周面との間にインキ漏れ防止部が設けられる。 In addition, the pressure-type writing instrument of the present invention has a pen nib made of a porous body having continuous pores at the tip, a so-called plastic core having a complex capillary formed in the axial direction, a fiber assembly, and the like as a pen tip. A pen core such as a sign pen or a marker, and a follower that follows the ink and a trailing edge of the ink is disposed in the rear ink container, and the pumping pressure mechanism described above is further disposed behind the ink follower. This makes it possible to use a pressure-type writing instrument. Moreover, the form of a writing front-end | tip part can respond with the form comprised with a normal sign pen, a marker, etc. fundamentally. Further, if necessary, the pen core is fixed to the front shaft by a positive locking portion, or an ink leakage preventing portion is provided between the outer peripheral portion of the pen core and the peripheral surface of the insertion hole of the front shaft.

（作用）
次に、実施例の作用を以下に説明する。
先ず、押し体１２がポンピングされ、シールリング１３が押し体の軸部１２ｃに設けられた凹部１２ｄの後端側に寄って、外気と遮断された状態で押し体１２が前進することによってフォロア１０の後端が加圧される。
そのことは、落下衝撃やインキの流動性の悪さ等に起因して先端ボールの周面からインキが離れてしまい連続的なインキの流出がとぎれるのを防止する作用ととぎれた時に回復する作用となる。 (Function)
Next, the operation of the embodiment will be described below.
First, the pusher 12 is pumped, and the seal ring 13 approaches the rear end side of the recess 12d provided in the shaft 12c of the pusher, and the pusher 12 moves forward in a state of being blocked from the outside air, whereby the follower 10 is moved forward. The rear end is pressurized.
That is, it prevents the ink from separating from the peripheral surface of the tip ball due to a drop impact or poor ink fluidity and prevents the continuous outflow of ink and recovers when interrupted. Become.

押し体１２を最前進した状態で押し体１２を一方に回動すると、押し体の突部１２ｇが軸筒の周溝１５ｅに嵌挿されて押し体１２の後退が阻止され、フォロア１０の後端が加圧された状態に維持される。また、その状態から押し体１２を反対方向に回動すると阻止状態が解除されて押し体が後退し、そのとき、シールリング１３が押し体の軸部１２ｃに設けられた凹部１２ｄの前端側に寄って、外気と連通された状態で後退することによってフォロア１０の後端が外気圧以下に減圧されることなく後退できる。
従って、従来のように加圧効果が低下する懸念がない。（但し、厳密にはシールリング１３が凹部１２ｄの前端側に寄って通気溝１２ｅによってシールリング１３の前後部が連通する迄の摺動間隔は減圧方向に作用する。） When the pusher 12 is rotated to one side with the pusher 12 moved forward most, the protrusion 12g of the pusher is inserted into the circumferential groove 15e of the shaft cylinder to prevent the pusher 12 from moving backward. The end is maintained under pressure. Further, when the pusher 12 is rotated in the opposite direction from that state, the blocking state is released and the pusher is retracted. At that time, the seal ring 13 is moved to the front end side of the recess 12d provided in the shaft 12c of the pusher. The rear end of the follower 10 can move backward without being reduced below the atmospheric pressure by moving backward while being in communication with the outside air.
Therefore, there is no concern that the pressurizing effect is reduced as in the prior art. (However, strictly speaking, the sliding interval until the seal ring 13 approaches the front end side of the recess 12d and the front and rear portions of the seal ring 13 communicate with each other by the ventilation groove 12e acts in the pressure reducing direction.)

ところで、インキ収容管２の内周面とシールリング１３の外周面との間の摩擦抵抗に対してシールリング１３の内周面と押し体の凹部１２ｄの周面との間の摩擦抵抗は十分小さく設定されており、必要に応じて押し体の軸部（押し体本体に対して軸部を別体に設ける場合もある。）を摩擦係数の小さな材質を選択したり、シールリングの外面を軟質、内面を硬質の二層構造としたり、シールリングの内面や押し体の凹部の周面に摩擦抵抗を軽減する処理などが施される。
尚、基本的にはシールリングが押し体の凹部の後端側に寄った状態以外は、シールリングが凹部に遊嵌される状態であってもよい。 By the way, the frictional resistance between the inner peripheral surface of the seal ring 13 and the peripheral surface of the concave portion 12d of the pressing body is sufficient with respect to the frictional resistance between the inner peripheral surface of the ink containing tube 2 and the outer peripheral surface of the seal ring 13. Select a material with a small friction coefficient for the shaft part of the pusher body (the shaft part may be provided separately from the pusher body) as necessary. A soft two-layer structure with a hard inner surface, or a treatment to reduce frictional resistance is applied to the inner surface of the seal ring or the peripheral surface of the concave portion of the push body.
Basically, the seal ring may be loosely fitted in the recess except for the state where the seal ring is close to the rear end side of the recess of the push body.

次に、ボールペンリフィールの作用について説明する。
図１はチップ３を上向きにした状態を示しており、スプリング７の棒軸部７ａの押圧で先端ボール６がチップ抱持部３ａの内縁に密接されているのでインキの逆流は防止されている。また、その時弁体８がは弁室５の弁体受け座５ａに位置して導孔５ｂを密閉するので、上向き筆記されてチップの先端ボール６背面のインキがなくなっても、インキにヘッドが掛かり逆流することがない。従って、チップ３を下向きにした時にインキが即流出可能となる。
因みにボール弁を有しない構造では、上向き筆記を繰り返すとインキが逆流方向に作用するのでチップ内に空気を巻き込み、下向き筆記で即インキが流出しにくくなる傾向がある。また、フォロア棒１１はインキ収容管が大径である場合に使用される。即ち、グリース状のフォロア１０は、インキ収容管が大径の場合に衝撃などの影響で変形を受け破壊されやすいという問題がある。フォロア内にフォロアと略同等の比重を有する樹脂製のフォロア棒を浸漬させることにより剛性を上げることが可能となる。 Next, the operation of the ballpoint pen refill will be described.
FIG. 1 shows a state in which the tip 3 is directed upward, and the tip ball 6 is brought into close contact with the inner edge of the tip holding portion 3a by pressing of the rod shaft portion 7a of the spring 7, so that the backflow of ink is prevented. . At that time, the valve body 8 is positioned at the valve body receiving seat 5a of the valve chamber 5 and seals the guide hole 5b. There is no backflow. Therefore, the ink can immediately flow out when the tip 3 is turned downward.
Incidentally, in the structure having no ball valve, when the upward writing is repeated, the ink acts in the reverse flow direction, so that air is entrapped in the chip, and the ink tends to hardly flow out immediately when writing downward. The follower bar 11 is used when the ink containing tube has a large diameter. That is, the grease-like follower 10 has a problem that when the ink containing tube has a large diameter, the grease-like follower 10 is easily deformed and damaged by an impact or the like. It is possible to increase the rigidity by immersing a resin-made follower rod having a specific gravity substantially equal to that of the follower in the follower.

また、チップ３を下向きにした筆記状態に於いては、弁体８がチップの後端の一方に偏った状態に当接し、他方にはチップ３内にインキが流入可能な溝部５ｃが構成され、インキ収容管２から導孔５ｂを経て弁室５に入ったインキ９は溝部５ｃを通りチップ３の先端ボール６の背面まで誘導される。 Further, in the writing state with the tip 3 facing downward, the valve body 8 is in contact with a state biased to one of the rear ends of the tip, and the other is formed with a groove portion 5c through which ink can flow into the tip 3. The ink 9 that has entered the valve chamber 5 from the ink containing tube 2 through the guide hole 5b is guided to the back surface of the tip ball 6 of the chip 3 through the groove 5c.

尚、この状態では、スプリング７の棒軸部７ａの押圧で先端ボール６がチップ抱持部３ａの内縁に密接されるのでインキの直流が防止される。また、筆圧により先端ボール６が後退するので隙間を生じてインキが流出可能となり、加圧作用に支援されて筆記による先端ボール６の回転でインキが流出され、誤記等がそのインキにより隠蔽される。 In this state, the tip ball 6 is brought into close contact with the inner edge of the chip holding portion 3a by the pressing of the rod shaft portion 7a of the spring 7, so that direct current of ink is prevented. Further, since the tip ball 6 moves backward due to the writing pressure, a gap is formed and the ink can flow out, and the ink is flowed out by the rotation of the tip ball 6 by writing with the aid of the pressurizing action, so that an error or the like is hidden by the ink. The

上記のフォロア棒や弁体を有したインキの逆流防止構造は、インキ収容管が大径で逆流しやすい場合や、上向き筆記を繰り返した時や衝撃が掛かった時に性能を発揮するものであって、構成要素として必須のものではなく、特に誤記修正用のボールペンは上向きに使用されることはまず無いので必ずしも必要としない。 The ink backflow prevention structure with the follower bar and valve body described above demonstrates performance when the ink containing tube has a large diameter and is easy to backflow, when repeated upward writing, or when an impact is applied. The ballpoint pen for correcting errors is not always necessary because it is rarely used upward.

次に、筆記先端部をペン芯とした場合について説明する。
例えば、消しゴムで容易に消去可能とするインキの場合、インキの着色微粒子が小さいと紙の繊維内に染みこんで消去性が悪くなる問題がある。また、大きすぎる場合、着色微粒子の分散安定性が低下してペン先が詰まったり、発色が悪く、鮮明な色の描線が得られないなどの問題があり、着色微粒子の粒径は１〜２０μ、望ましくは２〜１０μ程度と言われている。
また、インキの粘度は、粘度が低すぎると着色微粒子が分離しやすく、粘度が高すぎるとペン先を出したまま放置しておくと極めて短時間でペン芯が詰まって筆記不可となる問題があり、インキの粘度は５〜３５ｍｐａ．ｓｅｃ程度、繊維集合体よりなるペン芯は１０ｍｐａ．ｓｅｃ以下にすべきとも言われている。 Next, a case where the writing tip is a pen core will be described.
For example, in the case of an ink that can be easily erased with an eraser, there is a problem that if the colored fine particles of the ink are small, the ink penetrates into the fiber of the paper and the erasability deteriorates. On the other hand, when the particle size is too large, there is a problem that the dispersion stability of the colored fine particles is reduced, the pen tip is clogged, the color is poor, and a clear color drawing line cannot be obtained. Preferably, it is said to be about 2 to 10 μm.
Also, if the viscosity of the ink is too low, the colored fine particles are easily separated, and if the viscosity is too high, if the pen tip is left out, the pen core clogs in a very short time and writing becomes impossible. And the viscosity of the ink is 5 to 35 mpa. sec, the pen core made of the fiber assembly is 10 mpa. It is said that it should be less than sec.

本発明に使用されるペン芯は、連続気孔を有した多孔質体（ウレタン状のものもしくは硬質の焼結体）、押出し成形等で軸方向に針葉状の複雑な毛細管が形成される所謂プラ芯、繊維集合体、などからなるが、インキの流出機能としてインキの自重や毛管作用のみに依存しないことにある。
また、通常のペン芯に適用するインキの粘度範囲の上限を超えたものや、着色微粒子の粒径の上限を超えたインキの対応を可能とし、ペン先に詰まりを生じない気孔を有し、必要に応じて、インキの濡れを低下させる。（例えば、インキの表面張力より小さく、インキをはじく状態となるようにペン芯の材質選定や表面処理が施される。）
すなわち、インキの筆記に伴う流出は加圧作用に支援されて可能となるものである。また、携帯時や長期間使用しない状況下に於いて、フォロアの後端と外気が連通するように設ければ、ペン先からのインキのボタ落ちやペン先の詰まりが確実に防止可能となる。 The pen core used in the present invention is a so-called plastic core in which a needle-like complex capillary is formed in the axial direction by a porous body (urethane-like or hard sintered body) having continuous pores, extrusion molding or the like. Although it consists of a core, a fiber assembly, etc., the ink outflow function does not depend only on the weight of the ink or the capillary action.
In addition, those that exceed the upper limit of the viscosity range of the ink applied to a normal pen core and ink that exceeds the upper limit of the particle size of the colored fine particles, and have pores that do not clog the pen tip, If necessary, reduce ink wetting. (For example, the material of the pen core is selected and the surface treatment is applied so that the surface tension of the ink is smaller than the surface tension of the ink and the ink is repelled.)
That is, the outflow accompanying ink writing can be supported by the pressurizing action. In addition, if the rear end of the follower communicates with the outside air when it is carried or not used for a long period of time, it will be possible to reliably prevent ink from dropping from the nib and clogging of the nib. .

（その他の実施形態）
上述した実施形態は、ボールペンリフィールを軸筒に装着自在とし、軸筒の後端に加圧機構部を設けているが、軸筒を省き、インキ収容管の後端に直に加圧機構部を配設することも可能である。また、上述した実施形態は、押し体に設けたシールリングをインキ収容管の内孔周面に密接させているが、押し体のシールリングを軸筒の内面に密接させ、インキ収容管の後端外周部と軸筒の内面との間にシール部（何れか一方に全周状の凸部を設けるなど）を設けることで対応することも可能である。
また更に、押し体の構成を後端側からノック棒、回転子、シールリングを備えた軸部で構成（筆記先端部を出没させるためにノック式のボールペン等に用いられる機構）して、ノック操作によって軸部を交互に前後退させることも可能である。 (Other embodiments)
In the above-described embodiment, the ballpoint pen refill can be freely attached to the shaft cylinder, and the pressure mechanism portion is provided at the rear end of the shaft tube, but the shaft cylinder is omitted and the pressure mechanism portion is directly provided at the rear end of the ink containing tube. It is also possible to arrange. In the above-described embodiment, the seal ring provided on the pressing body is in intimate contact with the inner peripheral surface of the ink storage tube. It is also possible to cope with this by providing a seal portion (such as providing a full-circular convex portion on either one) between the end outer peripheral portion and the inner surface of the shaft tube.
Furthermore, the structure of the push body is composed of a shaft portion provided with a knock bar, a rotor, and a seal ring from the rear end side (a mechanism used for a knock-type ballpoint pen or the like for projecting and retracting the writing tip portion), and knocking is performed. It is also possible to move the shaft part back and forth alternately by operation.

本発明に使用するボールペンリフィールの全体を示す縦断面図であり、チップを上向きした状態を示している。It is a longitudinal cross-sectional view which shows the whole ball-point pen refill used for this invention, and has shown the state which faced the chip | tip upward. 本発明の加圧式の筆記具の前半部を示す断面図で、キャップを軸筒の先方に嵌着した状態を示している。It is sectional drawing which shows the front half part of the pressurization type writing instrument of this invention, and has shown the state which fitted the cap to the tip of the axial cylinder. 本発明の加圧式の筆記具の後半部を示す断面図である。It is sectional drawing which shows the latter half part of the pressurization type writing instrument of this invention. ポンピングした状態に於ける加圧式の筆記具の後半部を示す断面図である。It is sectional drawing which shows the latter half part of the pressure-type writing instrument in the pumped state. 本発明の別の形態の加圧式の筆記具の後半部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the second half part of the pressure-type writing instrument of another form of this invention. 本発明の別の形態のボールペンリフィールの全体を示す縦断面図である。It is a longitudinal cross-sectional view which shows the whole ball-point pen refill of another form of this invention.

Explanation of symbols

１ボールペンリフィール
２インキ収容管
３チップ
３ａボール抱持部
３ｂ軸部
４継ぎ手
４ａ前軸部
４ｂ鍔部
４ｃ後軸部
４ｄチップ嵌着孔
４ｅリブ
５弁室
５ａ弁体受け座
５ｂ導孔
５ｃ溝部
６先端ボール
７スプリング
７ａ棒軸部
８弁体
９インキ
１０フォロア
１１フォロア棒
１２押し体
１２ａ段部
１２ｂ鍔部
１２ｃ軸部
１２ｄ凹部
１２ｅ通気溝
１２ｆ孔部
１２ｇ突部
１３シールリング
１４スプリング
１５軸筒
１５ａ軸部
１５ｂクリップ
１５ｃ段部
１５ｄ縦溝
１５ｅ周溝
１６口先部
１６ａ段部
１７キャップ
１７ａインナーキャップ
１８シール栓体

DESCRIPTION OF SYMBOLS 1 Ball-point pen refill 2 Ink accommodating tube 3 Tip 3a Ball holding part 3b Shaft part 4 Joint 4a Front shaft part 4b Ridge part 4c Rear shaft part 4d Tip fitting hole 4e Rib 5 Valve chamber 5a Valve body seat 5b Conductive hole 5c Groove part 6 Tip ball 7 Spring 7a Rod shaft portion 8 Valve body 9 Ink 10 Follower 11 Follower rod 12 Push body 12a Step portion 12b Gutter portion 12c Shaft portion 12d Recessed portion 12e Ventilation groove 12f Hole portion 12g Projection portion 13 Seal ring 14 Spring 15 Shaft 15a Shaft portion 15b Clip 15c Step portion 15d Vertical groove 15e Circumferential groove 16 Mouth portion 16a Step portion 17 Cap 17a Inner cap 18 Seal plug

Claims

The ink storage tube is provided with a follower that prevents ink from evaporating at the rear end of the ink and follows the ink as the ink is consumed. A pumping pressure mechanism is provided behind the ink storage tube. In the pressure-type writing instrument configured to pressurize the rear end of the follower by pushing air into the rear end hole of the ink containing tube by the forward operation of the pumping, the pumping type pressurizing mechanism unit Is provided in a state in which the pressing body is always urged rearward with respect to the ink containing tube via a spring, a circumferential concave portion is formed in the front shaft portion of the pressing body, and further, the front end from the bottom surface of the concave portion is formed. A vent groove communicating with the surface is formed, and the seal ring is closely inserted into the recess so that the seal ring slides back and forth, and when the pusher moves forward, the seal ring approaches the rear end side of the recess and the front and rear portions of the seal ring. There is no ventilation With further advancement, the outer periphery of the seal ring slides closely along the inner periphery of the ink containing tube, the rear end of the follower is pressurized, and when the pusher is retracted, the seal ring moves toward the front end of the recess. A pressure-type writing instrument in which the front and rear parts of the seal ring are in communication with each other through the ventilation groove and the pusher can be retracted with the rear end of the follower in communication with the outside air.

The pressure-type writing instrument according to claim 1, wherein a lock device is provided so as to prevent the pusher from moving backward in a state where the pusher is moved forward and the rear end of the follower is pressurized.