JPH11301162A - Ballpoint pen - Google Patents
Ballpoint penInfo
- Publication number
- JPH11301162A JPH11301162A JP10119935A JP11993598A JPH11301162A JP H11301162 A JPH11301162 A JP H11301162A JP 10119935 A JP10119935 A JP 10119935A JP 11993598 A JP11993598 A JP 11993598A JP H11301162 A JPH11301162 A JP H11301162A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- ink
- ball
- rear end
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Pens And Brushes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、低粘度のインキが充填
されて成るボールペンの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved ballpoint pen filled with a low-viscosity ink.
【０００２】[0002]
【従来の技術】一般に、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、所謂剪断減粘性を有
した水性インキ又は低粘度の油性インキを使用したボー
ルペンが知られている。そのような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。又、インキの粘度は油性ボールペンのイン
キに比べて遙かに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、インキの自重や衝撃によりイン
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先端ボール背面のイン
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。又、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。又、先端ボ
ールを抱持するチップ先端の抱持部は微小且つ薄肉状に
形成されている為に、無理な筆記や落下衝撃で変形や磨
耗により先端ボールが脱落する事故がある。その場合、
インキが直流して周囲を汚す危険がある。特に、ノック
式ボールペンのリフィールとして使用される場合にはチ
ップ先端がキャップオフとなるので危険度が高くなる。2. Description of the Related Art In general, a ballpoint pen using a water-based ink having a so-called shear-thinning viscosity or a low-viscosity oil-based ink, in which the viscosity is reduced by rotation of a tip ball during writing and the ink flows out, is known. . A ballpoint pen using such an ink has a large amount of outflow of ink (to increase the writing density), and the diameter of the ink storage tube is increased to increase the amount of loaded ink. Further, since the viscosity of the ink is much smaller than that of the oil-based ball-point pen, the flow resistance to the ink container is small. Therefore, ink leakage (ink flows backward at the rear end of the ink storage tube) easily occurs due to the weight and impact of the ink. For this purpose, a grease-like follower is provided at the rear end of the ink, which normally moves following the consumption of the ink during writing, but suppresses the backflow of the ink against its own weight or impact. However, even if a follower is provided, when ink is run out of the ball at the tip of the tip when writing upwards, there is a danger that the ink or the head will be added directly, causing a significant backflow and soiling the hands and clothes. Further, since the viscosity of the ink is low and the amount of outflow is large, there is a problem that the ink is bleeding (direct current) when a gap is formed between the tip ball and the tip holding portion when the tip side is directed downward. In addition, since the holding portion at the tip of the tip that holds the tip ball is formed to be minute and thin, there is an accident that the tip ball falls off due to deformation or wear due to excessive writing or drop impact. In that case,
There is a risk that the ink will flow direct current and stain the surroundings. In particular, when used as a refill of a knock ballpoint pen, the tip of the tip is capped off, so that the risk is high.
【０００３】[0003]
【発明が解決しようとする課題】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）を使用した比較的に大径の
先端ボールを有するボールペンの改良であって、以下の
性能を必要に応じて満足すると共にコストダウンを目的
とする。ボールペンの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、ボールペンの軸筒内や手、衣服の汚損を防
止可能とする。又、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
筆記掠れを防止することと、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。又、無理な筆記や落下衝撃で変形や
磨耗により先端ボールが脱落する事故が生じた場合でも
インキ直流を阻止可能とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a low-viscosity ink (an aqueous ink having a shear-thinning viscosity or a low-viscosity ink, in which the viscosity is reduced by the rotation of the tip ball during writing so that the ink flows out). The present invention is an improvement of a ballpoint pen having a relatively large diameter tip ball using an oil-based ink, etc., which satisfies the following performance as required and aims at cost reduction. It is possible to prevent backflow of ink caused by upward writing or impact of a ballpoint pen and direct current when the tip side is placed downward, thereby preventing contamination of the inside of the ball-point pen barrel, hands and clothes. It also prevents writing screeching caused by running out of ink due to air entrainment on the back of the tip ball when upward writing and impact is applied, and drying caused by incomplete sealing between the tip ball and the inner edge of the tip holding portion. Enables prevention of handwriting. In addition, even when an accident occurs in which the tip ball comes off due to deformation or wear due to excessive writing or a drop impact, ink direct current can be prevented.
【０００４】[0004]
【課題を解決するための手段】請求項１に記載の発明に
係るボールペンは、先端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
キが充填されて成るボールペンに於いて、チップは樹脂
成型品で後方の軸部の後端内孔部に段部が形成されると
共に軸部に後端より適宜長さの切欠部が所用箇所で形成
されて、その軸部後端からチップの内孔部にスプリング
が挿入されると共にスプリングの後端が上記段部に抜け
止め係止されてなり、そのスプリングの押圧力でチップ
先端部に回転自在に抱持された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
るように構成されてなる。According to a first aspect of the present invention, there is provided a ball-point pen having a tip of a ball-point pen and an ink storage tube at a rear end thereof, the ink storage tube being filled with low-viscosity ink. In the ballpoint pen, the tip is a resin molded product, a step is formed in the rear end inner hole of the rear shaft, and a notch of an appropriate length from the rear end is formed in the shaft at the required location, A spring is inserted into the inner hole of the chip from the rear end of the shaft, and the rear end of the spring is retained and locked by the above-mentioned step, and is rotatably held at the tip of the chip by the pressing force of the spring. The tip ball thus set is configured to come into close contact with the inner edge of the ball holding portion of the chip so as to prevent the outflow of ink.
【０００５】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、継ぎ手の先
端にボールペンのチップを、後方にインキ収容管を有し
て成るボールペンであって、継ぎ手の軸心にチップの軸
部後端に対峙して後方に弁体を遊嵌した弁室と、弁室の
後部にテーパー状又は球面状の弁体受け座が設けられる
と共に弁室とインキ収容管を連通する導孔が設けられ
て、チップ側が上向きの時に、上記弁体が弁室後部の弁
体受け座に密接して導孔が密閉されてインキの逆流が阻
止され、チップ側が下向きの時に、上記弁体が軸部後端
に当接すると共に切欠部を通じてインキが流入可能とな
るように構成されてなる。[0005] A ballpoint pen according to a second aspect of the present invention is the ballpoint pen according to the first aspect, wherein a tip of the ballpoint pen is provided at a tip of a joint, and an ink storage tube is provided at the rear. A valve chamber in which a valve body is loosely fitted rearwardly opposite the shaft end of the chip to the shaft center of the joint, and a tapered or spherical valve body receiving seat is provided at the rear of the valve chamber, and the valve chamber and ink are provided. A guide hole communicating with the accommodating pipe is provided, and when the tip side is upward, the valve body is in close contact with the valve body receiving seat at the rear of the valve chamber, the guide hole is sealed, and the backflow of ink is prevented, and the tip side faces downward. At this time, the valve body comes into contact with the rear end of the shaft portion, and ink can flow through the cutout portion.
【０００６】請求項３に記載の発明に係るボールペン
は、請求項１乃至２に記載のボールペンに於いて、チッ
プ内孔部の前方に密接用段部が形成され、スプリングの
先端に当接し且つ上記密接用段部に対峙する関係でボー
ル状の栓体が設けられ、更にその栓体の先方に当接部が
設けられて、その当接部の先端が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
されてなる時に、上記密接用段部と上記栓体との間にイ
ンキ流通可能な隙間が形成されるよう構成されて成る。According to a third aspect of the present invention, there is provided a ball-point pen according to any one of the first to second aspects, wherein a step portion for close contact is formed in front of the inner hole portion of the chip to contact the tip of the spring. A ball-shaped plug is provided so as to face the close step, and a contact portion is further provided at the tip of the plug, and the tip of the contact portion presses the back surface of the tip ball to form a tip. When the ball is brought into close contact with the inner edge of the ball holding portion of the chip, a gap through which ink can flow is formed between the close step portion and the plug.
【０００７】請求項４に記載の発明に係るボールペン
は、請求項１乃至２に記載のボールペンに於いて、軸部
後端からチップの内孔部にインキ誘導芯とそのインキ誘
導芯の後端にスプリングが配設されると共に、スプリン
グの押圧力でインキ誘導芯の先端が先端ボールの背面を
押圧するように構成されてなる。A ballpoint pen according to a fourth aspect of the present invention is the ballpoint pen according to the first or second aspect, wherein the ink guide core and the rear end of the ink guide core extend from the rear end of the shaft to the inner hole of the chip. And the tip of the ink guide wick presses the back surface of the tip ball by the pressing force of the spring.
【０００８】[0008]
【実施例】図１及び図３は本発明の一実施例を示してい
る。先ず、図に示すように、ポリプロピレン樹脂製のチ
ューブよりなる内部にインキ１１が充填されたインキ収
容管１０の内径筆記部側に固着される後軸部８とチップ
１が圧入固着される内孔６ａを有する継ぎ手５には、内
部の略中央に導孔６ｄを持つテーパー状又は球面状の弁
体受け座６ｃを設け、チップの軸方向後端と弁体受け座
６ｃとによって形成される弁室６ｂ内に遊嵌されたボー
ル状の弁体９によって、通常の筆記時にはインキ収容管
１０から筆記部となる先端ボール２までを連通する構造
とした上で、上向きでは弁体９が継ぎ手５の弁体受け座
６ｃに密接することによってインキの逆流を防止した構
造のボールペンであって、当該ボールペンはキャップ式
又はキャップオフのノック式筆記具に搭載して使用され
る所謂ボールペンのリフィール形態を示したものであ
る。1 and 3 show an embodiment of the present invention. First, as shown in the drawing, a rear shaft portion 8 fixed to the inner writing portion side of an ink container 10 filled with ink 11 inside a tube made of a polypropylene resin, and an inner hole into which the tip 1 is press-fitted and fixed. The joint 5 having the valve 6a is provided with a tapered or spherical valve body receiving seat 6c having a guide hole 6d substantially at the center thereof, and a valve formed by the axial rear end of the chip and the valve body receiving seat 6c. A ball-shaped valve element 9 loosely fitted in the chamber 6b allows communication from the ink storage tube 10 to the tip ball 2 serving as a writing portion during normal writing. A ball-point pen having a structure in which backflow of ink is prevented by being in close contact with the valve body receiving seat 6c, and the ball-point pen is mounted on a cap-type or cap-off knock-type writing instrument and used as a so-called ball-point pen. Shows the Iru form.
【０００９】このボールペンでは、インキ１１には静的
には高い粘性を有し、筆記時の先端ボール２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及び油性インキ（通称中粘度
インキと呼ぶ）又は低粘度の油性インキが充填され、更
にインキ収容管１０のボールペン軸方向後方には、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１２と経時安定性と耐落下性能向上のためのフォロ
ア棒１３が設けられている。In this ball-point pen, the ink 11 has a statically high viscosity, and the viscosity of the ink decreases due to the rotation of the tip ball 2 during writing, and the ink 11 has a shear thinning viscosity so that the ink flows out smoothly. A grease-like follower 12 for preventing the ink from volatilizing and flowing out is provided at the rear of the ink containing tube 10 in the axial direction of the ball-point pen, filled with water-based and oil-based ink (commonly called medium viscosity ink) or low-viscosity oil-based ink. And a follower rod 13 for improving stability with time and drop resistance.
【００１０】図２は、本発明のボールペンの筆記先端部
であるチップ１を示している。チップ１は樹脂成型品で
後方の軸部４の後端内孔部に段部４ｂが形成されると共
に軸部４に後端より適宜長さの切欠部４ａが所用箇所で
形成されている。又、筆記部である先端ボール２をカシ
メ等により形成されるボール抱持部１ａとインキの導通
を確保するチャンネルを有し、先端ボール２を受ける受
け座面１ｂを有することによって遊嵌してある。又、軸
部後端からチップの内孔部にスプリング３が挿入される
と共に（上記切欠部４ａにより軸部４が適宜拡開する）
スプリング３の後端が上記段部４ｂに抜け止め係止され
てなり、そのスプリング３先端の棒軸部３ａの先端で先
端ボール２の背面を押圧して、チップ先端部に回転自在
に抱持された先端ボール２がチップのボール抱持部１ａ
の内縁に密接されてインキの流出や乾燥が阻止されるよ
うに構成されている。FIG. 2 shows a tip 1 which is a writing tip of a ballpoint pen according to the present invention. The chip 1 is a resin molded product. A step 4b is formed in the rear end inner hole of the rear shaft 4 and a cutout 4a having an appropriate length from the rear end is formed in the shaft 4 at a required position. Further, the tip ball 2 as a writing portion is loosely fitted by having a channel for securing conduction of ink with a ball holding portion 1a formed by caulking or the like and having a receiving seat surface 1b for receiving the tip ball 2. is there. Also, the spring 3 is inserted into the inner hole of the chip from the rear end of the shaft (the shaft 4 is appropriately expanded by the cutout 4a).
The rear end of the spring 3 is retained and locked by the step portion 4b. The back end of the tip ball 2 is pressed by the tip of the rod shaft portion 3a at the tip of the spring 3, and is rotatably held at the tip end portion of the tip. The tip ball 2 is the ball holding portion 1a of the chip.
Is arranged so as to be closely contacted with the inner edge of the ink to prevent the outflow and drying of the ink.
【００１１】又、チップ１の内孔面にスプリング３の捲
線部が接触してバネ作用の動きが疎外されないため、組
み立て時の挿入や向きの検知をやりやすくするため、チ
ップ１の最小径となる中心孔を貫通して先端ボール２を
押圧する直線状の棒軸部３ａを極力チップ１の中心から
伸ばすため、更にチップ１は、通常中心部の内径が後端
部の内径よりも小さくなるのでスプリング３もその略中
央を後端側よりも小径とするか、又は、全体が十分に小
さいスプリング外径とする必要がある等を考慮してスプ
リング３の捲線部の先端を小径に、捲線部の後端を大径
になしている。Also, since the winding of the spring 3 does not come into contact with the inner hole surface of the chip 1 and the movement of the spring action is not alienated, it is easy to detect the insertion and the orientation at the time of assembly. Since the straight rod portion 3a that penetrates through the center hole and presses the tip ball 2 extends as much as possible from the center of the tip 1, the tip 1 usually has an inner diameter smaller at the center portion than at the rear end portion. Therefore, the spring 3 has a small diameter at the front end of the winding portion of the spring 3 in consideration of the fact that it is necessary to make the center of the spring 3 smaller in diameter than the rear end side, or to consider that the whole outer diameter must be sufficiently small. The rear end of the part has a large diameter.
【００１２】ところで、上述した継ぎ手５とインキ収容
管１０は一体の樹脂成型品とすることも可能である。
又、継ぎ手５とインキ収容管１０を直接筆記具の軸体と
することも可能である。又、上述した実施例の弁体９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 above-mentioned joint 5 and ink storage tube 10 can be formed as an integral resin molded product.
Further, the joint 5 and the ink storage tube 10 can be directly used as a shaft of a writing instrument. Although the valve body 9 of the above-described embodiment is shown in a ball shape, the valve body is formed in a shaft shape and both end faces are formed in a tapered or spherical shape, and a groove for ink guide is formed on a side face as necessary. It is also possible to configure so that.
【００１３】図３はチップの他の実施形態を示してい
る。スプリング３の先端に当接してボール状の栓体１７
が設けられ、更に栓体１７の前方には短寸細径の当接部
１７ａが設けられて、その当接部１７ａの先端が先端ボ
ール２の背面に押圧状に当接され、先端ボール２は、そ
の押圧でチップ１のボール抱持部１ａの内縁に密接状態
と成される。又、チップ１の内孔部には中心孔１ｃの後
部にテーパー状又は球面状の密接用段部１ｄが形成され
ており、その密接用段部１ｄに対し上記栓体１７がイン
キ流入可能な適宜隙間を有して対峙されている。尚、上
記栓体１７は先端にテーパー部を有したコマ状のもので
あってもよい。FIG. 3 shows another embodiment of the chip. A ball-shaped plug 17 abuts against the tip of the spring 3
A contact portion 17a having a small diameter is provided in front of the plug 17, and the tip of the contact portion 17a is pressed against the back surface of the tip ball 2 so as to be pressed. Is brought into close contact with the inner edge of the ball holding portion 1a of the chip 1 by the pressing. In the inner hole of the chip 1, a tapered or spherical contact step 1d is formed at the rear of the center hole 1c, and the plug 17 allows ink to flow into the contact step 1d. They are confronted with an appropriate gap. The stopper 17 may be in the form of a top having a tapered portion at the tip.
【００１４】図５はチップの更に他の実施形態を示して
いる。軸部後端からチップの内孔部にインキ誘導芯２１
とそのインキ誘導芯２１の後端にスプリング２２が配設
されると共に、スプリング２２の押圧力でインキ誘導芯
２１の先端が先端ボール２の背面を押圧するように構成
されている。FIG. 5 shows still another embodiment of the chip. The ink guide core 21 is inserted into the inner hole of the chip from the rear end of the shaft.
A spring 22 is disposed at the rear end of the ink guide core 21, and the tip of the ink guide core 21 presses the back surface of the tip ball 2 by the pressing force of the spring 22.
【００１５】[0015]
【作用】図１はチップ１を下向きにした筆記前の状態を
示しており、その時、弁体９はチップ１の後端に当接状
態となり導孔６ｄが開放される。又、チップ後端には所
用箇所で切欠部４ａが設けられておりインキ収容管１０
から導孔６ｄを経て弁室６ｂに入ったインキ１１は先端
ボール２の背面まで誘導される。尚、この状態では、ス
プリング３の棒軸部３ａの押圧で先端ボール２がチップ
のボール抱持部１ａの内縁に密接されるのでインキの直
流が防止される。又、筆圧により先端ボール２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２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。FIG. 1 shows a state before writing, with the chip 1 facing down. At this time, the valve element 9 comes into contact with the rear end of the chip 1 and the guide hole 6d is opened. A notch 4a is provided at the required position at the rear end of the chip.
The ink 11 that has entered the valve chamber 6 b through the guide hole 6 d is guided to the back of the tip ball 2. In this state, the tip ball 2 is brought into close contact with the inner edge of the ball holding portion 1a of the chip by the pressing of the rod shaft portion 3a of the spring 3, so that direct current of ink is prevented. In addition, the tip ball 2 is slightly retreated by the writing pressure, so that a gap is generated and ink can flow out. By writing, the viscosity of the tip ball 2 decreases due to the rotation of the tip ball 2 and the ink flows out. Becomes possible.
【００１６】尚、先端ボール２の背面には受け座面１ｂ
（チップ内孔に向かって貫通したインク流入溝を複数箇
所に有した先端ボールの受け座）があり受け座面１ｂの
中心孔１ｃには棒軸部３ａの先端が貫通する。チップ１
内のインキはインキ流入溝及び中心孔１ｃと棒軸部３ａ
との間の隙間を通じて先端ボール２背面に誘導される。Note that the back surface of the tip ball 2 has a receiving seat surface 1b.
There is a (reception seat for a tip ball having an ink inflow groove penetrating toward the chip inner hole at a plurality of locations), and the tip of the rod shaft portion 3a passes through the center hole 1c of the reception seat surface 1b. Chip 1
The ink in the inside is the ink inflow groove and the center hole 1c and the rod shaft 3a.
Is guided to the back of the tip ball 2 through a gap between the front ball 2 and the front ball 2.
【００１７】又、チップ１を上向きにした状態では、弁
体９が弁室６ｂの弁体受け座６ｃに密接して導孔６ｄを
密閉するので、上向き筆記で先端ボール２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１
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。又、上向き筆記の繰り返しで空気の巻き込
みが累積される。）When the tip 1 is turned upward, the valve element 9 is in close contact with the valve element receiving seat 6c of the valve chamber 6b and seals the guide hole 6d. Even if the ink does not flow back. Therefore, chip 1
When ink is turned downward, the ink can immediately flow out, and writing is prevented from being flared. (By the way, in a structure without a valve,
In the upward writing, the ink acts in the reverse flow direction, so that air is trapped in the chip, and in the downward writing, the ink does not immediately follow, resulting in rubbing. Further, air entrapment is accumulated by repeating upward writing. )
【００１８】又、先端ボール２は常時チップ抱持部の内
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。又、先端ボール２と弁体９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。Further, since the tip ball 2 is always in close contact with the inner edge of the tip holding portion, the tip of the tip ball is dried to prevent handwriting. Further, even if upward writing or impact is applied by the cooperative action of the tip ball 2 and the valve element 9, air entrainment is prevented, so that writing is prevented.
【００１９】ところで、無理な筆記やノックや落下の衝
撃の影響で、万一、先端ボール２が脱落する事故が生じ
た場合には、図４に示すようにスプリング１５の押圧に
よって栓体１７がチップ１の密接用段部１ｄに水密状に
当接するのでインキの直流が防止可能となる。In the event that the tip ball 2 falls off due to the impact of excessive writing, knocking or dropping, the plug 17 is pushed by the spring 15 as shown in FIG. Since it comes into contact with the step 1d for close contact of the chip 1 in a watertight manner, direct current of the ink can be prevented.
【００２０】又、図５に示すチップ２０は万一、先端ボ
ール２が脱落する事故が生じた場合でもインキ誘導芯２
１が先端部を閉塞しインキの直流を防止する。The tip 20 shown in FIG. 5 can be used even in the event that the tip ball 2 falls off.
1 closes the tip and prevents direct current of the ink.
【００２１】[0021]
【発明の効果】本発明のボールペンの構成及び作用は以
上の如くであり、筆記時以外は先端ボールがチップ抱持
部の内縁に密接するので、インキの直流や逆流が防止さ
れ、軸筒内や手や衣服等を汚す事故が防止される。又、
乾燥による筆記掠れも防止される。又、弁室内に遊嵌す
る弁体を併設することで、先端ボールとチップ抱持部と
の密接不完全状態や、上向き筆記や衝撃による過酷なイ
ンキの逆流状態が保証される。又、無理な筆記やノック
や落下衝撃の影響で、万一、先端ボールが脱落する事故
が生じた場合でもインキの直流が防止可能となる。又、
チップを樹脂成型品となしたことでチップの面倒な加工
工程が省略され、スプリングの取り付けが容易となって
コストダウンを計ることが可能となる。The configuration and operation of the ballpoint pen according to the present invention are as described above. Since the tip ball is in close contact with the inner edge of the chip holding portion except when writing, the direct current or backflow of ink is prevented and the inside of the shaft cylinder is prevented. Accidents that stain hands, clothes, etc. are prevented. or,
Writing scratches due to drying are also prevented. In addition, by providing a valve element that fits loosely in the valve chamber, a state of incomplete close contact between the tip ball and the tip holding portion and a state of severe ink backflow due to upward writing or impact are guaranteed. In addition, even if an accidental drop of the tip ball occurs due to the influence of excessive writing, knocking, or drop impact, direct current of the ink can be prevented. or,
Since the chip is formed of a resin molded product, a troublesome processing step for the chip is omitted, the spring can be easily attached, and the cost can be reduced.
【図１】本発明の一実施例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。FIG. 1 is a longitudinal sectional view of a ballpoint pen according to an embodiment of the present invention, showing a state in which a chip is directed downward.
【図２】図１の実施例に於けるチップの拡大断面図であ
る。FIG. 2 is an enlarged sectional view of a chip in the embodiment of FIG.
【図３】チップの他の実施形態を示す断面図である。FIG. 3 is a sectional view showing another embodiment of a chip.
【図４】図３に示すチップ先端から先端ボールが脱落し
た時の状態を示した要部の断面図である。FIG. 4 is a cross-sectional view of a main part showing a state in which a tip ball has fallen from the tip tip shown in FIG. 3;
【図５】チップの更に他の実施形態を示す断面図であ
る。FIG. 5 is a sectional view showing still another embodiment of the chip.
１ チップ １ａ ボール抱持部 １ｂ 受け座面 １ｃ 中心孔 １ｄ 密接用段部 ２ 先端ボール ３ スプリング ３ａ 棒軸部 ４ 軸部 ４ａ 切欠部 ４ｂ 段部 ５ 継ぎ手 ６ 前軸部 ６ａ 内孔 ６ｂ 弁室 ６ｃ 弁体受け座 ６ｄ 導孔 ７ 鍔部 ８ 後軸部 ９ 弁体 １０ インキ収容管 １１ インキ １２ フォロア １３ フォロア棒 １４ 捲線部 １５ スプリング １６ 棒軸部 １７ 栓体 １７ａ 当接部 ２０ チップ ２０ａ ボール抱持部 ２０ｂ 段部 ２１ インキ誘導芯 ２２ スプリング DESCRIPTION OF SYMBOLS 1 Chip 1a Ball holding part 1b Receiving seat surface 1c Center hole 1d Close step part 2 Tip ball 3 Spring 3a Bar shaft part 4 Shaft part 4a Notch part 4b Step part 5 Joint 6 Front shaft part 6a Inner hole 6b Valve chamber 6c Valve body receiving seat 6d Guide hole 7 Flange part 8 Rear shaft part 9 Valve body 10 Ink storage tube 11 Ink 12 Follower 13 Follower rod 14 Winding part 15 Spring 16 Bar shaft part 17 Plug body 17a Contact part 20 Chip 20a Ball holding Part 20b Step 21 Ink lead 22 Spring
Claims (4)
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
充填されて成るボールペンに於いて、 チップは樹脂成型品で後方の軸部の後端内孔部に段部が
形成されると共に軸部に後端より適宜長さの切欠部が所
用箇所で形成されて、その軸部後端からチップの内孔部
にスプリングが挿入されると共にスプリングの後端が上
記段部に抜け止め係止されてなり、そのスプリングの押
圧力でチップ先端部に回転自在に抱持された先端ボール
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に構成されたことを特徴とするボー
ルペン。1. A ball-point pen having a tip of a ball-point pen at an end thereof and an ink-storing tube at the rear, wherein the ink-storing tube is filled with low-viscosity ink. A step is formed in the inner hole of the rear end, and a notch of an appropriate length from the rear end is formed in the shaft at the required position, and a spring is inserted from the rear end of the shaft into the inner hole of the chip. At the same time, the rear end of the spring is retained and locked by the step, and the tip ball rotatably held at the tip end by the spring pressing force is brought into close contact with the inner edge of the ball holding portion of the tip. Characterized in that the ink is prevented from flowing out.
後方にインキ収容管を有して成るボールペンであって、
継ぎ手の軸心にチップの軸部後端に対峙して後方に弁体
を遊嵌した弁室と、弁室の後部にテーパー状又は球面状
の弁体受け座が設けられると共に弁室とインキ収容管を
連通する導孔が設けられて、チップ側が上向きの時に、
上記弁体が弁室後部の弁体受け座に密接して導孔が密閉
されてインキの逆流が阻止され、チップ側が下向きの時
に、上記弁体が軸部後端に当接すると共に切欠部を通じ
てインキが流入可能となるように構成されたことを特徴
とする請求項１に記載のボールペン。2. A tip of a ballpoint pen at the end of the joint,
A ballpoint pen having an ink storage tube at the rear,
A valve chamber in which a valve body is loosely fitted rearwardly opposite the shaft end of the chip to the shaft center of the joint, and a tapered or spherical valve body receiving seat is provided at the rear of the valve chamber, and the valve chamber and ink are provided. A guide hole communicating with the housing tube is provided, and when the chip side is facing up,
The valve body is in close contact with the valve body receiving seat at the rear of the valve chamber, the guide hole is sealed, and backflow of ink is prevented.When the tip side is downward, the valve body contacts the rear end of the shaft and through the notch. The ballpoint pen according to claim 1, wherein the ballpoint pen is configured to allow ink to flow therein.
され、スプリングの先端に当接し且つ上記密接用段部に
対峙する関係でボール状の栓体が設けられ、更にその栓
体の先方に当接部が設けられて、その当接部の先端が先
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てなる時に、上記密接用段部と
上記栓体との間にインキ流通可能な隙間が形成されるよ
う構成されて成ることを特徴する請求項１乃至２に記載
のボールペン。3. A close contact step is formed in front of the chip inner hole, and a ball-shaped plug is provided in contact with the tip of the spring and opposed to the close step. When the tip of the contact portion presses the back surface of the tip ball and the tip ball comes into close contact with the inner edge of the ball holding portion of the chip, the contact portion is provided with the contact step portion. The ballpoint pen according to claim 1, wherein a gap through which ink can flow is formed between the plug and the plug.
導芯とそのインキ誘導芯の後端にスプリングが配設され
ると共に、スプリングの押圧力でインキ誘導芯の先端が
先端ボールの背面を押圧するように構成されたことを特
徴とする請求項１乃至２に記載のボールペン。4. An ink guide wick and a spring are provided at the rear end of the ink guide wick from the rear end of the shaft to the inner hole of the chip, and the tip of the ink guide wick is formed by the pressing force of the spring. The ballpoint pen according to claim 1, wherein the ballpoint pen is configured to press a back surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10119935A JPH11301162A (en) | 1998-04-15 | 1998-04-15 | Ballpoint pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10119935A JPH11301162A (en) | 1998-04-15 | 1998-04-15 | Ballpoint pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11301162A true JPH11301162A (en) | 1999-11-02 |
Family
ID=14773820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10119935A Withdrawn JPH11301162A (en) | 1998-04-15 | 1998-04-15 | Ballpoint pen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11301162A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008110579A (en) * | 2006-10-31 | 2008-05-15 | Pilot Ink Co Ltd | Ballpoint pen distal end section |
-
1998
- 1998-04-15 JP JP10119935A patent/JPH11301162A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008110579A (en) * | 2006-10-31 | 2008-05-15 | Pilot Ink Co Ltd | Ballpoint pen distal end section |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050331 |
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