JP2006224474A - Ballpoint pen - Google Patents

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JP2006224474A
JP2006224474A JP2005041489A JP2005041489A JP2006224474A JP 2006224474 A JP2006224474 A JP 2006224474A JP 2005041489 A JP2005041489 A JP 2005041489A JP 2005041489 A JP2005041489 A JP 2005041489A JP 2006224474 A JP2006224474 A JP 2006224474A
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tip
ball
ink
ballpoint pen
spring
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Seiichi Kobayashi
小林  清一
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Mitsubishi Pencil Co Ltd
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Mitsubishi Pencil Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enable easy and smooth insertion into a chip even when there is a burr in the front end of a shank part of a spring, to make a fore-end ball rotate smoothly on the occasion of writing and to enable exhibition of an excellent writing performance free from a writing scratch, regarding a ballpoint pen using ink of low viscosity. <P>SOLUTION: This ballpoint pen has the ballpoint pen chip in front of a joint and has an ink holding tube in the rear. A lengthwise outer peripheral part of the pipe-shaped tip having a supporting seat formed of inward projections in a plurality of places is fitted in the fore end of the joint so that a holder is provided, and the fore-end ball is held rotatably in the fore end of the tip, contacting the supporting seat. The fore-end ball is so provided that it is pressed by the shank part in front of the winding part of the spring and brought into close contact with the inner edge of the ball holding part of the chip, so that outflow of the ink be obstructed. In this constitution, an expanded hole having a concave or convex curved surface is formed in the rear-end opening of a hole communicating with the rear end of the chip of the holder. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、スプリングの押圧で先端ボールがチップのボール抱持部の内縁に密接されて、インキの流出が阻止されるよう構成されたパイプ状チップを有するボールペンの改良に関する。   The present invention relates to an improvement of a ballpoint pen having a pipe-shaped tip configured such that the tip ball is brought into close contact with the inner edge of the ball holding portion of the tip by pressing of a spring and the outflow of ink is prevented.

特開2002−067566JP2002-067566 特開2002−086977JP2002-086977 特開2003−260891JP 2003260891 A 特開平08−230378Japanese Patent Laid-Open No. 08-230378

一般に、低粘度のインキ(筆記時の先端ボールの回転で粘性が低下してインキが流出される剪断減粘性を有した水性インキまたは低粘度の油性インキなど)を使用したボールペンは、上向き筆記や衝撃によって生じるインキの逆流とチップ側を下向きに置いた時の直流の問題があり、筆記具内や手、衣服等を汚損する虞がある。また、上向き筆記、衝撃が加わった時の先端ボール背面の空気巻き込みに伴うインキ切れで起きる筆記掠れや、先端ボールとチップ抱持部の内縁との間の乾燥で起きる筆記掠れ等の問題がある。
そこで、問題を解消する手段として、
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設けられている。
また、チップの後端とインキ収容部との間に弁体を遊嵌した弁室を設け、上向き筆記や衝撃に対して弁体がインキの導孔を閉塞してインキが逆流するの防止するよう設けられている。
また、先端ボールの背面をスプリングで押圧して先端ボールをチップのボール抱持部の内縁に密接し、インキの直流及び逆流防止と筆記先端部の乾燥を防止するように設けられている。また更に、以上の手段を併用して安全性や信頼性を高める工夫がなされている。
In general, ballpoint pens using low-viscosity ink (such as water-based ink or shear-thinning ink that has a viscosity decrease due to the rotation of the tip ball during writing and the ink flows out) There is a problem of reverse flow of ink caused by impact and direct current when the tip side is placed downward, and there is a possibility that the writing instrument, hands, clothes, etc. may be soiled. In addition, there are problems such as upward writing, writing blur that occurs due to ink running out due to air entrainment on the back of the tip ball when an impact is applied, and writing blur that occurs due to drying between the tip ball and the inner edge of the chip holding portion. .
So, as a means to solve the problem,
A grease-like follower is provided at the trailing edge of the ink to follow the ink consumption during writing, but suppresses the backflow of the ink against the ink's own weight and impact.
In addition, a valve chamber in which a valve body is loosely fitted is provided between the rear end of the chip and the ink storage portion, and the valve body closes the ink guide hole against upward writing or impact to prevent ink from flowing back. It is provided as follows.
Further, the back surface of the tip ball is pressed by a spring so that the tip ball is brought into close contact with the inner edge of the ball holding portion of the chip to prevent direct current and backflow of ink and drying of the writing tip portion. Furthermore, the idea which raises safety | security and reliability by using the above means together is made | formed.

上記特許文献1には、先端ボールの背面を押圧するスプリングの端面はカットしたままなので、スプリングを配設する際、ストレート部(棒軸部)の先端面の角部やバリがチップ内面に引っ掛かり、所定の位置にコイルスプリングを配設できず、ボールが押圧されないという問題が指摘されている。
また、問題を解決する手段として、「チップ先端にボールを回転自在に抱持し、チップ内に、中央にインキ流通孔と該インキ流通孔に連通する放射状に延びた放射状溝を有した、前記ボールが当接するボール座を設け、コイル線材からなる先端にストレート部を有するコイルスプリングを、ストレート部が前記インキ流通孔を通ってボールの後端に当接させて配設し、ボールをチップ先端縁に押圧してなるボールを筆記媒体とするペン先部構造において、前記コイルスプリングのストレート部の先端面に丸みを形成したこと、また、丸みがバレル研磨によって形成されること」などが示されている。
In Patent Document 1, since the end face of the spring that presses the back surface of the tip ball remains cut, when the spring is disposed, the corner or burr of the tip face of the straight portion (rod shaft portion) is caught on the inner surface of the chip. A problem has been pointed out that the coil spring cannot be disposed at a predetermined position and the ball is not pressed.
Further, as means for solving the problem, “the ball is rotatably held at the tip of the chip, and the chip has an ink circulation hole and a radially extending radial groove communicating with the ink circulation hole in the center, A ball seat with which the ball abuts is provided, and a coil spring having a straight portion at the tip made of a coil wire is disposed so that the straight portion abuts the rear end of the ball through the ink circulation hole, and the ball is placed at the tip of the chip. In the pen tip structure using a ball pressed against the edge as a writing medium, the tip surface of the straight portion of the coil spring is rounded, and the round is formed by barrel polishing. ing.

上記特許文献2には、押圧部材は内径の小さなチップ内に挿入し、さらに縮径されたボールハウス背後の通孔内に挿入する必要があるために、バリの突出量が小さい場合でもチップ内への挿入による装填時に引っ掛りで手数を要するばかりでなく、装填時にバリが欠落してチップ内に落下し、インク又は塗布液の充填後に該インク等に混入し、筆記又は塗布時に支障をきたす虞があること、また、インク中に混入したバリが転写ボールに付着すると、該ボールの回転不良により筆記掠れや不書きの原因になるとともに、正常な弁機能が確保されずインク漏れやインク乾燥の原因となることが指摘されている。
また、問題を解決する手段として、「チップ先端のボールハウス内にボールを回転自在に抱持し、該ボールを棒状押圧部材の先端により弾性的に押圧している筆記具において、前記押圧部材の先端面外周を面取りしてなることを特徴とする。本発明における筆記具は、ボールペン又はボールペン用レフィールあるいは修正液や化粧液などの塗布具等であり、上記押圧部材は、コイルスプリングの一端側に直線状一体に延出した押杆部であり、あるいはスプリングにより付勢されている可動子の押杆部である。本発明によれば、押圧部材すなわち押杆部の先端面外周が面取りされているので、バリが残存していることによる前記障害を解消することができる。」と記載されている。
In Patent Document 2, the pressing member needs to be inserted into a chip having a small inner diameter, and further inserted into a through hole behind the reduced diameter ball house. In addition to being troublesome when hooked by loading into the chip, burrs are missing during loading and fall into the chip, and after filling with ink or coating liquid, it mixes into the ink, etc., causing trouble during writing or coating. In addition, if burrs mixed in the ink adhere to the transfer ball, writing failure or writing may occur due to poor rotation of the ball, and normal valve function may not be ensured and ink leakage or ink drying may occur. It has been pointed out that it causes
Further, as a means for solving the problem, in the writing instrument in which the ball is rotatably held in the ball house at the tip end and elastically pressed by the tip of the rod-like pressing member, the tip of the pressing member The writing instrument according to the present invention is a ballpoint pen, a refill for a ballpoint pen, an applicator such as a correction liquid, a cosmetic liquid, or the like, and the pressing member is straight on one end side of the coil spring. According to the present invention, the outer periphery of the distal end surface of the pressing member, that is, the pressing portion is chamfered. Therefore, it is possible to eliminate the obstacle caused by remaining burrs. "

上記特許文献3には、スプリングは、成形後、切断により得られるため、スプリングのストレート部の先端は、エッジやバリ等が生じたり、傾斜面状等の不安定な形状になりがちである。そのため、ストレート部の先端とボールの後面との安定した接触が維持できず、ボールを適正に前方へ押圧できなかったり、ボールの円滑な回転が得られない恐れがある。また、チップ本体内にスプリングのストレート部を挿入する際、ストレート部の先端が、スプリングの供給途中で引っ掛かり、スプリングの円滑な挿入組立性が低下する恐れがあることが指摘されている。
また、問題を解決する手段として、「本発明は、チップ本体2の先端に筆記用ボール21が内向きの先端縁部22により回転可能に抱持され、ストレート部31を備えたスプリング3により、前記ボール21が前方に押圧されて前記先端縁部22の内面に密接されてなるボールペンであって、前記ストレート部31の先端をバレル研磨加工し、前記ストレート部31の先端を前記ボール21の後面に当接させてなること(請求項1)を要件とする。更に、前記ストレート部31の先端が、凸曲面状に形成されてなること(請求項2)を要件とする。更に、前記ストレート部31の先端に形成された凸曲面が球面状であり、前記球面の曲率半径が、ストレート部31の外径の半径と略等しく設定されてなること(請求項3)を要件とする。更に、前記チップ本体2が金属製パイプよりなり、前記チップ本体2の先端に内向きの先端縁部22を形成すると共に、前記チップ本体2の先端近傍側壁にボール受け座用の複数の内方突起23を形成し、前記先端縁部22と前記内方突起23との間でボール21を回転可能に抱持してなること(請求項4)を要件とする。」と記載されている。
In Patent Document 3, since the spring is obtained by cutting after molding, the tip of the straight portion of the spring tends to have an edge, a burr or the like, or an unstable shape such as an inclined surface. For this reason, stable contact between the tip of the straight portion and the rear surface of the ball cannot be maintained, and there is a fear that the ball cannot be properly pushed forward or the ball cannot be smoothly rotated. Further, it has been pointed out that when the straight portion of the spring is inserted into the chip body, the tip of the straight portion may be caught during the supply of the spring, and the smooth insertion and assembly of the spring may be deteriorated.
Further, as means for solving the problem, “the present invention is such that the writing ball 21 is rotatably held at the tip end of the chip body 2 by the inward tip edge portion 22, and the spring 3 including the straight portion 31 is used. A ballpoint pen in which the ball 21 is pressed forward and is in close contact with the inner surface of the tip edge 22, the tip of the straight portion 31 is barrel-polished, and the tip of the straight portion 31 is placed on the rear surface of the ball 21. (Claim 1) and the tip of the straight portion 31 is formed in a convex curved surface (Claim 2), and the straight. The convex curved surface formed at the tip of the portion 31 is spherical, and the radius of curvature of the spherical surface is set to be substantially equal to the radius of the outer diameter of the straight portion 31 (Claim 3). The chip body 2 is made of a metal pipe, and an inward leading edge 22 is formed at the tip of the chip body 2, and a plurality of inward projections 23 for ball receiving seats are formed on the side wall near the tip of the chip body 2. And the ball 21 is rotatably held between the tip edge portion 22 and the inward projection 23 (claim 4). "

上記特許文献4には、継ぎ手の先端にボールペンのチップを、後方にインク収容管を有して成るボールペンに於いて、継ぎ手の先端にパイプ状細径のチップの長手外周部を嵌着するホルダーを圧着すると共に後方に内孔が設けられ、その内孔の後方段部にスプリングの捲線部後端を当接した状態で前方にスプリングが附勢されて、スプリングの棒軸部前端でチップ先端部に回転自在に抱持された先端ボールの背面を押圧して先端ボールがチップのボール抱持部の内縁に密接され、また、継ぎ手内孔の後方段部にテーパー状または球面状のボール受け座が設けられ、ボール受け座に密接可能とするボール弁が捲線部の内孔に遊嵌され、またホルダーの後端に所要数のリブが設けられて、チップ側が上向きの時にボール弁がボール受け座に密接して導孔が密閉され、チップ側が下向きの時に密閉状態が解除されると共にリブの後端にボール弁が当接してチップ内にインクが流入するように構成されたボールペンが示されている。   In Patent Document 4, a ballpoint pen having a tip of a joint and a ballpoint pen having an ink containing tube at the back, a holder for fitting a long peripheral portion of a small pipe-shaped tip to the tip of the joint. And an inner hole is provided at the rear, and the spring is urged forward with the rear end of the spring in contact with the rear step of the inner hole, and the tip of the tip at the front end of the rod shaft of the spring The tip ball is pressed against the inner edge of the ball holding portion of the chip by pressing the back surface of the tip ball rotatably held by the portion, and a tapered or spherical ball receiver is provided at the rear step portion of the joint inner hole. A ball valve, which is provided with a seat and can be brought into close contact with the ball receiving seat, is loosely fitted into the inner hole of the winding portion, and a required number of ribs are provided at the rear end of the holder. Close to the pedestal Bore hole is sealed, the chip side is shown ballpoint pen ball valve at the rear end of the rib is configured such that the ink flows into contact with the chip with the closed state when downward is released.

本発明の課題は、低粘度のインキ(筆記時の先端ボールの回転で粘性が低下してインキが流出される剪断減粘性を有した水性インキ又は低粘度の油性インキなど)を使用し、上向き筆記や衝撃によって生じるインキの逆流とチップ側を下向きに置いた時の直流を防止可能とし、上向き筆記、衝撃が加わった時の先端ボール背面の空気巻き込みに伴うインキ切れで起きる筆記掠れを防止可能とし、先端ボールとチップ抱持部の内縁とのシール不完全に伴う乾燥で起きる筆記掠れの防止を可能とするボールペンであって、
スプリングの捲線部の前端に形成された棒軸部前端にカットにともなうバリがあても、スプリングがチップ内に容易に且つ、安定した位置に挿着可能であり、また、先端ボールはチップのボール抱持部の内面に密接し、筆記に際して円滑に回転して、筆記掠れの無い、良好な筆記性能を発揮できるボールペンを提供可能とする。
An object of the present invention is to use a low-viscosity ink (such as a water-based ink or a low-viscosity oil-based ink having shear thinning viscosity in which the viscosity is reduced by the rotation of the tip ball during writing and the ink flows out) It can prevent backflow of ink caused by writing and impact and direct current when the tip side is placed face down, and can prevent writing blurring due to ink running out due to air entrainment on the back of the tip ball when writing upward or impacting And a ballpoint pen that can prevent wrinkling of writing caused by drying due to imperfect sealing between the tip ball and the inner edge of the chip holding part,
Even if there is a burr due to the cut at the front end of the rod shaft part formed at the front end of the winding part of the spring, the spring can be easily inserted into the tip at a stable position, and the tip ball is the tip ball. It is possible to provide a ballpoint pen that is in close contact with the inner surface of the holding portion, rotates smoothly during writing, and exhibits good writing performance without writing distortion.

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ボールペンは、継ぎ手の先方にボールペンのチップを、後方にインキ収容管を有して、インキ収容管には低粘度のインキが充填されてなるボールペンであって、継ぎ手の先端に複数箇所の内方突起により形成された受け座を有するパイプ状チップの長手外周部を嵌着してホルダーが設けられ、前記受け座に背面を当接すると共にチップ先端に回転自在に先端ボールが抱持され、スプリングの捲線部前方の棒軸部によって先端ボールが押圧され、先端ボールがチップのボール抱持部の内縁に密接されてインキの流出が阻止されるよう設けられてなるものに於いて、前記ホルダーのチップ後端に連通する孔の後端口に凹状あるいは凸状の曲面を有した拡開孔が形成されてなる。
The present invention has the following configuration in order to achieve the above-described problems.
The ballpoint pen according to the invention of claim 1 is a ballpoint pen that has a tip of a ballpoint pen at the tip of the joint, an ink storage tube at the back, and the ink storage tube is filled with low-viscosity ink, A holder is provided by fitting the longitudinal outer periphery of a pipe-shaped tip having a receiving seat formed by a plurality of inward projections at the tip of the joint, and the back is brought into contact with the receiving seat and is rotatable at the tip of the tip The tip ball is held, and the tip ball is pressed by the rod shaft portion in front of the winding portion of the spring, and the tip ball is brought into close contact with the inner edge of the ball holding portion of the chip to prevent the outflow of ink. In the present invention, an opening having a concave or convex curved surface is formed at the rear end of the hole communicating with the rear end of the chip of the holder.

請求項2に記載の発明に係るボールペンは、請求項1に記載のボールペンに於いて、チップの受け座の中心部に形成された孔に挿通自在な当接ボールが先端ボールの背面に当接した状態に配設され、さらに、その当接ボールの背面にスプリング先方の棒軸部前端が当接するように設けられてなる。   A ballpoint pen according to a second aspect of the present invention is the ballpoint pen according to the first aspect, wherein a contact ball that can be inserted into a hole formed in a central portion of a receiving seat of the chip contacts the back surface of the tip ball. Furthermore, it is provided so that the front end of the rod shaft part ahead of the spring is in contact with the back surface of the contact ball.

請求項3に記載の発明に係るボールペンは、請求項1に記載のボールペンに於いて、ホルダー後方の継ぎ手内孔の後方段部に捲線部の後端を当接した状態で前方にスプリングが附勢され、その捲線部の前端に屈折部を経て略軸心で直線状の棒軸部が延設されてなる。   A ballpoint pen according to a third aspect of the present invention is the ballpoint pen according to the first aspect, wherein a spring is attached to the front in a state where the rear end of the winding portion is in contact with the rear step portion of the joint inner hole at the rear of the holder. The straight rod shaft portion is extended substantially at the axial center through the refracting portion at the front end of the winding portion.

請求項4に記載の発明に係るボールペンは、請求項3に記載のボールペンに於いて、継ぎ手内孔の後方段部の軸心にテーパー状または球面状の弁体受け座が設けられ、スプリングの捲線部内孔に弁体が遊嵌されて、チップ側が上向きの時に弁体が弁体受け座に密接して導孔が密閉され、チップ側が下向きの時に前記密閉状態が解除されると共に弁体がスプリングの捲線部前端に形成された屈折部に当接し、チップ内にインキが流入可能となる。   A ballpoint pen according to a fourth aspect of the present invention is the ballpoint pen according to the third aspect, wherein a tapered or spherical valve body seat is provided at the axial center of the rear step portion of the joint inner hole, The valve body is loosely fitted into the inner hole of the winding portion, and when the tip side is upward, the valve body is in close contact with the valve body receiving seat and the guide hole is sealed, and when the tip side is downward, the sealed state is released and the valve body is The ink comes into contact with the refracting portion formed at the front end of the winding portion of the spring, and the ink can flow into the chip.

本発明のボールペンは、スプリングの捲線部の前端に形成された棒軸部前端にカットにともなうバリがあても、ホルダー内孔の曲面に案内されてスプリングの棒軸部がチップ内に容易に且つ、安定した位置に挿着可能であり、また、棒軸部前端と先端ボールとの間に当接ボールが介在するので先端ボールはチップのボール抱持部の内面に密接し、筆記に際して円滑に回転して、筆記掠れの無い、良好な筆記性能を発揮できる。
また、棒軸部前端を受け座の後端に位置させることが可能となるので、チップ内でも引っ掛る問題いが無くスプリングをチップ内に容易に挿着することが可能となる。また、棒軸部前端は、積極的に回転しない当接ボールに接触した状態にあるので、バリが欠落してインク中に混入したり、先端ボールに付着して先端ボールの回転を阻害するような問題は無い。また、当接ボールは球体で方向性がないので容易に所定の位置に挿着可能であり、且つ、バレル研磨等の煩雑な工程と比較しても安価に提供可能である。
また、スプリングの屈折部にボール弁を当接するように構成したものは、ホルダーの後端に設けられたリブとスプリングの捲線部が係合して作動が阻害されるなどの虞が無く、当接部が単純なので気泡などの発生でインキの流路が阻害されるような虞も無い。
The ballpoint pen of the present invention is easily guided by the curved surface of the inner hole of the holder so that the rod shaft portion of the spring is easily inserted into the tip even if there is a burr due to the cut at the front end of the rod shaft portion formed at the front end of the winding portion of the spring. The ball can be inserted in a stable position, and since the contact ball is interposed between the front end of the rod shaft and the tip ball, the tip ball is in close contact with the inner surface of the ball holding portion of the chip, so that smooth writing is possible. Rotates and exhibits good writing performance without writing errors.
Further, since the front end of the rod shaft portion can be positioned at the rear end of the seat, there is no problem of being caught in the tip, and the spring can be easily inserted into the tip. Also, since the front end of the rod shaft part is in contact with the abutting ball that does not actively rotate, the burr is missing and mixed in the ink, or adheres to the tip ball and inhibits the tip ball from rotating. There is no problem. Further, since the contact ball is a spherical body and has no directionality, it can be easily inserted into a predetermined position, and can be provided at a lower cost than a complicated process such as barrel polishing.
In addition, the ball valve abutting against the refracted portion of the spring does not have a risk that the ribs provided at the rear end of the holder and the winding portion of the spring will be engaged and the operation will be hindered. Since the contact portion is simple, there is no possibility that the flow path of the ink is obstructed by the generation of bubbles or the like.

このボールペンは、インキは静的には高い粘性を有し、筆記時の先端ボールの回転によりインキの粘性が低下してインキがスムーズに流出される剪断減粘性を有した水性インキ(以下中粘度インキと呼ぶ)または低粘度の油性インキが充填され、更にインキ収容管には、インキの揮発防止と流れ出し防止のためのグリース状のフォロアと必要により耐落下性能向上のためのフォロア棒が設けられている。   In this ballpoint pen, the ink is statically highly viscous, and water-based ink (hereinafter referred to as medium viscosity) has shear thinning viscosity that allows the ink to flow out smoothly by the rotation of the tip ball during writing. (Referred to as ink) or low-viscosity oil-based ink, and the ink container is provided with a grease-like follower to prevent ink volatilization and flow-out and, if necessary, a follower rod to improve drop-proof performance. ing.

図1及び図2は本発明の第1の実施形態を示している。先ず、図に示すように、継ぎ手3の前半に係止筒部7と後半に嵌合筒部12を設け、前側の係止筒部7には円周上の所要位置に軸方向前方に傾斜したリブ8が設けられている。また、係止筒部7には前端より中心部にホルダー嵌着孔3aが形成されている。
継ぎ手3は弾性変形可能な合成樹脂により一体成形で構成されており、前記ホルダー嵌着孔3aに連通して後方に弁室16が形成されている。
また、弁室16の後端にはテーパー状または球面状の弁体受け座14が形成され、弁体受け座14の中心から後端に貫通した導孔19が設けられている。
1 and 2 show a first embodiment of the present invention. First, as shown in the figure, a locking cylinder part 7 is provided in the first half of the joint 3 and a fitting cylinder part 12 is provided in the second half, and the locking cylinder part 7 on the front side is inclined forward in the axial direction at a required position on the circumference. Ribs 8 are provided. In addition, a holder fitting hole 3 a is formed in the locking cylinder portion 7 in the center portion from the front end.
The joint 3 is integrally formed of an elastically deformable synthetic resin, and a valve chamber 16 is formed in the rear in communication with the holder fitting hole 3a.
A tapered or spherical valve body receiving seat 14 is formed at the rear end of the valve chamber 16, and a guide hole 19 penetrating from the center of the valve body receiving seat 14 to the rear end is provided.

ところで、チップ5はステンレス等のパイプで、外周の複数箇所の内方突起により形成され、中心部の孔の周縁にインキ流入可能なチャンネルを有した受け座5bに、先端ボール5aが略当接した状態で先端ボール5aが回転自在に抱持されるようにかしめられている。   The tip 5 is a pipe made of stainless steel or the like, formed by a plurality of inward projections on the outer periphery, and the tip ball 5a substantially contacts the receiving seat 5b having a channel through which ink can flow at the periphery of the hole in the center. In this state, the tip ball 5a is caulked so as to be rotatably held.

一方、ホルダー10は前端より中心部にチップ嵌着孔10aを有し、後端にチップ後端に連通する孔の後端口に凹状の曲面11を有した拡開孔が形成されている。また、ホルダー10のチップ嵌着孔10aにチップ5が後端側から挿入されて固着される。   On the other hand, the holder 10 has a chip fitting hole 10a at the center from the front end, and a widening hole having a concave curved surface 11 is formed at the rear end of the hole communicating with the rear end of the chip at the rear end. Further, the chip 5 is inserted into the chip insertion hole 10a of the holder 10 from the rear end side and fixed.

また、チップ内孔で先端ボール5aの受け座5bの中心部に形成された孔に挿通自在に当接ボール20が挿入され、当接ボール20は先端ボール5aの背面に当接した状態となされ、さらに、後方にスプリング17が挿着される。スプリング17は捲線部17bとその前端に屈折部17cを経て略軸心で直線状の棒軸部17aが延設されてなる。
スプリング17は、チップ5内孔に棒軸部17aが挿入されて前記当接ボール20の背面に棒軸部17a前端が当接する。また、ホルダー10が継ぎ手3のホルダー嵌着孔3aに嵌着され、捲線部17bがホルダー10の後方で継ぎ手3軸心の内孔(弁室16)に位置される。またそのとき、ボール状の弁体18が捲線部17bの内孔に遊嵌される。
また、捲線部17bの後端が内孔後端の段部15に当接されて、前記棒軸部17aの前端が当接ボール20を介して先端ボール5aの背面を押圧して、先端ボール5aがチップ5のボール抱持部5cの内縁に密接されてインキの流出が阻止可能となる。
また、弁体18は、スプリングの屈折部17cと弁室16後端の弁体受け座14との間で自由動する。
以上により、チップ側が下向きの時に上記弁体18がスプリングの屈折部17cの後端に当接状態となり、インキが導孔19を通じてチップ5の内孔に流入可能となる。
Further, the contact ball 20 is inserted into a hole formed in the center portion of the receiving seat 5b of the tip ball 5a at the tip inner hole so as to be freely inserted, and the contact ball 20 is brought into contact with the back surface of the tip ball 5a. Furthermore, a spring 17 is inserted on the rear side. The spring 17 is formed by extending a straight rod shaft portion 17a with a substantially axial center through a winding portion 17b and a refracting portion 17c at the front end thereof.
In the spring 17, the rod shaft portion 17 a is inserted into the inner hole of the tip 5, and the front end of the rod shaft portion 17 a is in contact with the back surface of the contact ball 20. Further, the holder 10 is fitted into the holder fitting hole 3 a of the joint 3, and the ridge portion 17 b is positioned behind the holder 10 in the inner hole (valve chamber 16) of the joint 3 axis. Further, at that time, the ball-shaped valve element 18 is loosely fitted into the inner hole of the winding portion 17b.
Further, the rear end of the winding portion 17b is brought into contact with the step portion 15 at the rear end of the inner hole, and the front end of the rod shaft portion 17a presses the back surface of the tip ball 5a via the contact ball 20, thereby 5a is brought into close contact with the inner edge of the ball holding portion 5c of the chip 5 so that the outflow of ink can be prevented.
Further, the valve body 18 freely moves between the spring bending portion 17 c and the valve body receiving seat 14 at the rear end of the valve chamber 16.
As described above, when the tip side is facing downward, the valve element 18 comes into contact with the rear end of the spring refracting portion 17 c, and ink can flow into the inner hole of the tip 5 through the guide hole 19.

また、継ぎ手3の前記係止筒部7の後端には鍔部13が設けられ、鍔部13の後方には嵌合筒部12が延設されている。嵌合筒部12の外周には筒状のインキ収容管4がその先端を鍔部13の後端に当接して圧入固着される。   Further, a collar portion 13 is provided at the rear end of the locking cylinder portion 7 of the joint 3, and a fitting cylinder portion 12 is extended behind the collar portion 13. A cylindrical ink storage tube 4 is press-fitted and fixed to the outer periphery of the fitting cylinder portion 12 with its tip abutting against the rear end of the collar portion 13.

また、インキ収容管4の内径部が継ぎ手3の導孔19に連通している。インキ収容管4内には基本的には低粘度であるが、静的には高い粘性を有し、筆記時のボールの回転で粘性が低下してインキが流出可能となる剪断減粘性を有したインキまたは低粘度の油性インキが充填され、インキの後端にインキの消耗と共にインキ面に接触して追随して移動可能なグリース状のフォロアが充填される。また、フォロア内に該フォロアと略同等の比重を有する樹脂製のフォロア棒が浸漬される。尚、フォロア棒は必要により(インキ収容部断面径が大きく、インキのヘッドが大きくなる。また、インキの粘性が低く、インキのヘッドが支えきれない等の場合)設けられる。また、フォロア棒は丸または異形断面を有した棒状、筒状、カップ状など特に形状は限定されない。(図示せず)   Further, the inner diameter portion of the ink containing tube 4 communicates with the guide hole 19 of the joint 3. Although the ink containing tube 4 is basically low in viscosity, it has a statically high viscosity, and has a shear thinning property that allows the ink to flow out by decreasing the viscosity due to the rotation of the ball during writing. Or a low-viscosity oil-based ink is filled, and a grease-like follower is filled at the rear end of the ink as the ink is consumed and in contact with the ink surface to move. Further, a resin-made follower rod having a specific gravity substantially equivalent to that of the follower is immersed in the follower. The follower rod is provided if necessary (in the case where the ink containing section has a large cross-sectional diameter and the ink head becomes large. In addition, the ink viscosity is low and the ink head cannot be supported). Further, the shape of the follower rod is not particularly limited, such as a rod shape, a cylindrical shape, or a cup shape having a round or irregular cross section. (Not shown)

以上のように、継ぎ手3にチップ5とインキを充填したインキ収容管4を固着して構成されたボールペンのリフィールを軸筒1に挿入して、軸部6の前面に継ぎ手3の鍔部13の後端縁を衝合させて、内面部に段部9を設けた口金2を、その段部9を継ぎ手3の前記リブ8の周面に衝合せしめた状態で軸筒1の軸部6に螺着させ、また、軸筒1の後端に尾栓等が止着されて(図示せず)ボールペンが構成される。   As described above, a refill of a ballpoint pen formed by fixing the tip 5 and the ink containing tube 4 filled with ink to the joint 3 is inserted into the shaft tube 1, and the flange portion 13 of the joint 3 is inserted in front of the shaft portion 6. The base portion of the shaft cylinder 1 is brought into contact with the base 2 having the stepped portion 9 on the inner surface thereof, and the stepped portion 9 is brought into contact with the peripheral surface of the rib 8 of the joint 3. 6 and screwed to the rear end of the barrel 1 (not shown) to form a ballpoint pen.

ところで、上述した継ぎ手3とインキ収容管4は一体の樹脂成形品とすることも可能である。また、継ぎ手3とインキ収容管4を直接筆記具の軸体とすることも可能である。
また、上述した実施形態の弁体はボール状で示しているが、弁体は軸状で両端面がテーパー状又は球面状に形成され、必要によって側面にインキ誘導のための溝が形成されるように構成することも可能である。
By the way, the joint 3 and the ink storage tube 4 described above can be formed as an integral resin molded product. Further, the joint 3 and the ink storage tube 4 can be directly used as a shaft of a writing instrument.
In addition, the valve body of the above-described embodiment is shown in a ball shape, but the valve body has an axial shape and both end surfaces are formed in a taper shape or a spherical shape, and a groove for guiding ink is formed on the side surface as necessary. It is also possible to configure as described above.

図3は本発明の第2の実施形態を示している。
当該実施形態は、第1の実施形態に対して弁体を有さない構造を示すもので、他の構成は同じなので説明は省略する。
FIG. 3 shows a second embodiment of the present invention.
The said embodiment shows the structure which does not have a valve body with respect to 1st Embodiment, Since other structures are the same, description is abbreviate | omitted.

図4は本発明の第3の実施形態を示しており、以下、第1の実施形態との相違点について説明する。
先ず、図に示すように、継ぎ手21の前半に係止筒部21bと後半に嵌合筒部21cを設け、さらに係止筒部21bの先方にはホルダー部21aがそれぞれ一体に設けられている。また、係止筒部21bには円周状の所要位置に軸方向前方に傾斜したリブが設けられている。また、前記ホルダー部21a前端より中心部にチップ嵌着孔が形成され、そこにチップ5が後端側から圧入されている。また、チップ後端に連通する孔の後端口に凸状の曲面21dを有した拡開孔が形成されている。
FIG. 4 shows a third embodiment of the present invention, and differences from the first embodiment will be described below.
First, as shown in the figure, a locking cylinder portion 21b is provided in the first half of the joint 21 and a fitting cylinder portion 21c is provided in the second half, and a holder portion 21a is integrally provided at the tip of the locking cylinder portion 21b. . Further, the locking cylinder portion 21b is provided with a rib inclined forward in the axial direction at a circumferential required position. Further, a chip fitting hole is formed in the center portion from the front end of the holder portion 21a, and the chip 5 is press-fitted into the tip portion from the rear end side. Further, a widened hole having a convex curved surface 21d is formed at the rear end of the hole communicating with the rear end of the chip.

継ぎ手21は弾性変形可能な合成樹脂により一体成形で構成されており、上記チップ嵌着孔に連通して後方に大径に拡開した孔部が形成されている。
一方、ブッシュ22は軸心に弁室22aを有し、その弁室22aの後端にテーパー状または球面状の弁体受け座22bが設けられ、前端に所要箇所で内方に突出した突条22cが設けられている。また、弁体受け座22bの中心から後端に貫通した導孔が設けられている。また、ブッシュ22の外周部に円周状に突部22dが形成されている。
The joint 21 is integrally formed of an elastically deformable synthetic resin, and has a hole that communicates with the chip insertion hole and expands to the rear with a large diameter.
On the other hand, the bush 22 has a valve chamber 22a at the shaft center, a tapered or spherical valve body receiving seat 22b is provided at the rear end of the valve chamber 22a, and a protrusion that protrudes inward at a required position at the front end. 22c is provided. Further, a guide hole penetrating from the center of the valve body receiving seat 22b to the rear end is provided. Further, a protrusion 22 d is formed on the outer periphery of the bush 22 in a circumferential shape.

図5は本発明の第4の実施形態を示しており、以下、第1の実施形態との相違点について説明する。
チップ後方の継ぎ手25の軸心にスプリング26の捲線部26bが収容される内孔部が設けられ、その内孔部の周面に所要数の突条25aが形成されて、スプリング26が継ぎ手後端から挿着されたときに、スプリングの捲線部26b後端の密着巻部後端が前記突条25aの前端に継ぎ手の弾性変形によって係止される。また、チップ後端に連通する孔の後端口に凹状の曲面25bを有した拡開孔が形成されている。
FIG. 5 shows a fourth embodiment of the present invention, and differences from the first embodiment will be described below.
An inner hole portion in which the winding portion 26b of the spring 26 is accommodated is provided at the axial center of the joint 25 at the rear of the tip, and a required number of protrusions 25a are formed on the peripheral surface of the inner hole portion. When inserted from the end, the rear end of the tightly wound portion at the rear end of the winding portion 26b of the spring is locked to the front end of the protrusion 25a by elastic deformation of the joint. In addition, an expansion hole having a concave curved surface 25b is formed at the rear end of the hole communicating with the rear end of the chip.

(作用)
第1の実施形態について説明する。
図1はチップ5を下向きにした筆記前の状態を示しており、その時、弁体18はスプリング17の屈折部17cの後端に当接状態となり導孔19が開放される。インキ収容管4から導孔19を経て弁室16に入ったインキは先端ボール5aの背面まで誘導される。 尚、この状態では、スプリング17の棒軸部17aの押圧で当接ボール20を介して先端ボール5aがチップのボール抱持部5c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5aが微小に後退するので隙間を生じてインキが流出可能となり、筆記により先端ボール5aの回転で粘性が低下してインキが流出され、ボテが無く、濃度の高い筆記が可能となる。
(Function)
A first embodiment will be described.
FIG. 1 shows a state before writing with the tip 5 facing downward. At that time, the valve body 18 comes into contact with the rear end of the refracting portion 17 c of the spring 17 and the guide hole 19 is opened. The ink that has entered the valve chamber 16 from the ink containing tube 4 through the guide hole 19 is guided to the back surface of the tip ball 5a. In this state, since the tip ball 5a is brought into close contact with the inner edge of the ball holding portion 5c of the chip through the contact ball 20 by the pressing of the rod shaft portion 17a of the spring 17, direct current of ink is prevented. Further, the tip ball 5a is slightly retracted by the writing pressure, so that a gap is created and the ink can flow out. By writing, the tip ball 5a is rotated to reduce the viscosity and the ink flows out. Is possible.

尚、先端ボール5aの背面には受け座5b(チップ外周に複数箇所の内方突起により形成され、中心部の孔の周縁にインキ流入可能なチャンネルが形成される)に先端ボール5aが略当接した状態で先端ボール5aが回転自在に抱持されるようにかしめられている。 中心部の孔には当接ボール20が遊嵌し、チップ5内のインキはチャンネル及び中心部の孔と棒当接ボール20との間の隙間を通じて先端ボール5aの背面に誘導される。   The tip ball 5a is substantially applied to a receiving seat 5b (formed by a plurality of inward projections on the outer periphery of the tip and a channel into which ink can flow is formed at the periphery of the hole at the center) on the back surface of the tip ball 5a. The tip ball 5a is caulked so as to be rotatably held in contact. The contact ball 20 is loosely fitted in the central hole, and the ink in the chip 5 is guided to the back surface of the tip ball 5 a through the gap between the channel and the central hole and the rod contact ball 20.

また、チップ5を上向きにした図2の状態では、弁体18が弁室16の弁体受け座14に密接して導孔19を密閉するので、上向き筆記で先端ボール5a背面のインキがなくなってもインキが逆流しない。従って、チップ5を下向きにした時にインキが即流出可能となり、筆記で掠れが防止される。
(因みに弁体を有しない構造では、上向き筆記で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追随せず掠れが生じる。また、上向き筆記の繰り返しで空気の巻き込みが累積される問題が有る。)
Further, in the state of FIG. 2 with the tip 5 facing upward, the valve body 18 is in close contact with the valve body receiving seat 14 of the valve chamber 16 and seals the guide hole 19, so that the ink on the back surface of the tip ball 5 a disappears by writing upward. However, the ink does not flow backward. Therefore, when the tip 5 is turned downward, the ink can immediately flow out, and dripping is prevented by writing.
(By the way, in the structure that does not have a valve body, the ink works in the reverse flow direction with upward writing, so air is entrained in the tip and the ink does not follow immediately with downward writing. (There is a problem that entrainment accumulates.)

また、先端ボール5aは常時ボール抱持部5cの内縁に密接しているので先端部位の乾燥で筆記掠れが防止される。また、先端ボール5aと弁体18の共同作用で上向き筆記や衝撃が加わっても空気の巻き込みが防止されるので筆記掠れが防止される。尚、インキの直流及び逆流はスプリング17による先端ボール5aへの押圧で果たされるが、ボール抱持部5cの加工バラツキによる先端ボール5aとの密接不完全状態や、ボール抱持部5cと先端ボール5aとの隙間に固形物が付着した場合の密接不完全状態を補足して、インキの大きなヘッドを支えてインキの逆流を確実に防止することと、空気巻き込みの緩和(掠れ防止)をするよう共同する。   Further, since the tip ball 5a is always in close contact with the inner edge of the ball holding portion 5c, the writing of the tip portion is prevented by drying the tip portion. In addition, even if an upward writing or impact is applied by the joint action of the tip ball 5a and the valve body 18, the air is prevented from being caught, so that the writing stroke is prevented. The direct current and the reverse flow of the ink are effected by pressing the tip ball 5a with the spring 17, but the intimate contact with the tip ball 5a due to processing variations of the ball holding portion 5c, the ball holding portion 5c and the tip ball Complementing the incomplete state when solid matter adheres to the gap with 5a, supporting a large ink head to reliably prevent ink backflow, and to reduce air entrainment (prevention of drooling) Collaborate.

また、実施形態のボールペンのリフィールは軸筒1に搭載された際に、継ぎ手3の鍔部13が軸部6の前端に衝合した状態で口金2が螺着され、そのとき、係止筒部7のリブ8が口金2の段部9に食いつき状に衝合するので、チップ5は口金2との間でガタ止めされる。また、実施形態のボールペンのリフィールは、先端シールを必要としないノック式ボールペン等のリフィールとすることも可能である。その場合、特に無理な筆記や落下衝撃で先端ボールが脱落した場合のインキ直流防止が重要となる。   Further, when the refill of the ballpoint pen of the embodiment is mounted on the shaft tube 1, the base 2 is screwed in a state in which the flange portion 13 of the joint 3 abuts the front end of the shaft portion 6, and at that time, the locking tube Since the ribs 8 of the portion 7 collide with the stepped portion 9 of the base 2 in a biting manner, the chip 5 is rattled with the base 2. In addition, the refill of the ballpoint pen of the embodiment can be a refill such as a knock type ballpoint pen that does not require a tip seal. In that case, it is important to prevent direct current of ink when the tip ball falls off due to excessive writing or drop impact.

尚、第2、第3、第4の実施形態は、上記第1の実施形態と基本的な作用について同じなのでその説明は省略する。
また、ホルダーのチップ後端に連通する孔の後端口に凹状あるいは凸状の曲面を有した拡開孔が形成されることによって、スプリングの棒軸部前端にカットにともなうバリがあても、前記曲面に案内されてスプリングの棒軸部がチップ内に容易に且つ、引っかかることも無く、安定した位置に挿着できる。
The second, third, and fourth embodiments are the same as the first embodiment in the basic operation, and thus the description thereof is omitted.
Further, by forming a widened hole having a concave or convex curved surface at the rear end opening of the hole communicating with the chip rear end of the holder, even if there is a burr due to the cut at the front end of the rod shaft portion of the spring, Guided by the curved surface, the rod shaft portion of the spring can be inserted into the tip easily and without being caught in a stable position.

本発明の第1の実施形態であるボールペンの縦断面図で、チップを下向きにした状態を示している。In the longitudinal cross-sectional view of the ball-point pen which is the 1st Embodiment of this invention, the state which turned the chip | tip downward is shown. 本発明の第1の実施形態であるボールペンの縦断面図で、チップを上向きにした状態を示している。In the longitudinal cross-sectional view of the ball-point pen which is the 1st Embodiment of this invention, the state which turned the chip | tip upward is shown. 本発明の第2の実施形態であるボールペンの縦断面図で、チップを上向きにした状態を示している。In the longitudinal cross-sectional view of the ball-point pen which is the 2nd Embodiment of this invention, the state which turned the chip | tip upward is shown. 本発明の第3の実施形態であるボールペンの縦断面図で、チップを上向きにした状態を示している。In the longitudinal cross-sectional view of the ball-point pen which is the 3rd Embodiment of this invention, the state which turned the chip | tip upward is shown. 本発明の第4の実施形態であるボールペンの縦断面図で、チップを上向きにした状態を示している。In the longitudinal cross-sectional view of the ball-point pen which is the 4th Embodiment of this invention, the state which turned the chip | tip upward is shown. チップ先端部の要部を拡大して断面図である。It is sectional drawing which expanded the principal part of a chip | tip front-end | tip part.

符号の説明Explanation of symbols

1 軸筒
2 口金
3 継ぎ手
4 インキ収容管
5 チップ
5a 先端ボール
5b 受け座
5c ボール抱持部
6 軸部
7 係止筒部
8 リブ
9 段部
10 ホルダー
10a チップ嵌着孔
10b 段部
11 曲面
12 嵌合筒部
13 鍔部
14 弁体受け座
15 段部
16 弁室
17 スプリング
17a 棒軸部
17b 捲線部
17c 屈折部
18 弁体
19 導孔
20 当接ボール
21 継ぎ手
21a ホルダー部
21b 係止筒部
21c 嵌合筒部
21d 曲面
22 ブッシュ
22a 弁室
22b 弁体受け座
22c 突条
22d 突部
23 スプリング
23a 棒軸部
23b 捲線部
24 弁体
25 継ぎ手
25a 突条
25b 曲面
26 スプリング
26a 棒軸部
26b 捲線部



DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Cap 3 Joint 4 Ink storage pipe 5 Tip 5a Tip ball 5b Receptacle seat 5c Ball holding part 6 Shaft part 7 Locking cylinder part 8 Rib 9 Step part 10 Holder 10a Tip fitting hole 10b Step part 11 Curved surface 12 Fitting cylinder portion 13 flange portion 14 valve body receiving seat 15 step portion 16 valve chamber 17 spring 17a rod shaft portion 17b flange portion 17c refracting portion 18 valve body 19 guide hole 20 contact ball 21 joint 21a holder portion 21b locking cylinder portion 21c Fitting cylinder portion 21d Curved surface 22 Bush 22a Valve chamber 22b Valve body receiving seat 22c Projection 22d Projection 23 Spring 23a Rod shaft portion 23b Winding portion 24 Valve body 25 Joint 25a Projection 25b Curved surface 26 Spring 26a Rod shaft portion 26b Rod shaft portion 26b Part



Claims (4)

継ぎ手の先方にボールペンのチップを、後方にインキ収容管を有して、インキ収容管には低粘度のインキが充填されてなるボールペンであって、継ぎ手の先端に複数箇所の内方突起により形成された受け座を有するパイプ状チップの長手外周部を嵌着してホルダーが設けられ、前記受け座に背面を当接すると共にチップ先端に回転自在に先端ボールが抱持され、スプリングの捲線部前方の棒軸部によって先端ボールが押圧され、先端ボールがチップのボール抱持部の内縁に密接されてインキの流出が阻止されるよう設けられてなるものに於いて、前記ホルダーのチップ後端に連通する孔の後端口に凹状あるいは凸状の曲面を有した拡開孔が形成されてなるボールペン。   A ballpoint pen that has a ballpoint pen tip at the tip of the joint and an ink storage tube at the back, and the ink storage tube is filled with low-viscosity ink. A holder is provided by fitting a longitudinal outer peripheral portion of a pipe-shaped tip having a receiving seat, and a tip ball is held at the tip end of the tip so as to be in contact with the back surface and rotatably at the tip of the tip of the spring. The tip ball is pressed by the rod shaft portion of the tip, and the tip ball is brought into close contact with the inner edge of the ball holding portion of the chip so that the outflow of ink is prevented. A ballpoint pen in which a widened hole having a concave or convex curved surface is formed at the rear end of the communicating hole. チップの受け座の中心部に形成された孔に挿通自在な当接ボールが先端ボールの背面に当接した状態に配設され、さらに、その当接ボールの背面にスプリング先方の棒軸部前端が当接するように設けられてなる請求項1に記載のボールペン。   A contact ball that can be inserted into a hole formed in the center portion of the receiving seat of the chip is disposed in contact with the back surface of the tip ball, and further, on the back surface of the contact ball, the front end of the rod shaft portion ahead of the spring The ballpoint pen according to claim 1, wherein the ballpoint pen is provided so as to abut. ホルダー後方の継ぎ手内孔の後方段部に捲線部の後端を当接した状態で前方にスプリングが附勢され、その捲線部の前端に屈折部を経て略軸心で直線状の棒軸部が延設されてなる請求項1に記載のボールペン。   A spring is urged forward with the rear end of the saddle portion in contact with the rear step portion of the joint bore at the rear of the holder, and the rod shaft portion is linear with a substantially axial center via a refracting portion at the front end of the saddle portion. The ball-point pen according to claim 1, which is extended. 継ぎ手内孔の後方段部の軸心にテーパー状または球面状の弁体受け座が設けられ、スプリングの捲線部内孔に弁体が遊嵌されて、チップ側が上向きの時に弁体が弁体受け座に密接して導孔が密閉され、チップ側が下向きの時に前記密閉状態が解除されると共に弁体がスプリングの捲線部前端に形成された屈折部に当接し、チップ内にインキが流入可能となる請求項3に記載のボールペン。





















A tapered or spherical valve element seat is provided at the axial center of the rear step of the joint inner hole, and the valve element is loosely fitted in the inner hole of the spring line, and the valve element is received when the tip side is upward. When the guide hole is sealed in close contact with the seat, the sealed state is released when the tip side is facing down, and the valve body abuts on a refracting portion formed at the front end of the ridge portion of the spring, so that ink can flow into the tip The ballpoint pen according to claim 3.





















JP2005041489A 2005-02-18 2005-02-18 Ballpoint pen Withdrawn JP2006224474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005041489A JP2006224474A (en) 2005-02-18 2005-02-18 Ballpoint pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005041489A JP2006224474A (en) 2005-02-18 2005-02-18 Ballpoint pen

Publications (1)

Publication Number Publication Date
JP2006224474A true JP2006224474A (en) 2006-08-31

Family

ID=36986239

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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