JP3514531B2 - Ballpoint pen - Google Patents
Ballpoint penInfo
- Publication number
- JP3514531B2 JP3514531B2 JP29201594A JP29201594A JP3514531B2 JP 3514531 B2 JP3514531 B2 JP 3514531B2 JP 29201594 A JP29201594 A JP 29201594A JP 29201594 A JP29201594 A JP 29201594A JP 3514531 B2 JP3514531 B2 JP 3514531B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- tip
- ink
- 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.)
- Expired - Lifetime
Links
Landscapes
- Pens And Brushes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、筆記時には筆記部であ
るボールがホルダー内に保持されたスプリングの押圧が
筆記に要する筆記圧よりも弱いことを利用してスムーズ
な筆記性能を確保するとともに、非筆記時には筆記部で
あるボールを弁として利用して、耐衝撃性能やインクの
ドライアップ防止性能の向上や、インクが後方へ移動す
るインクドロップ防止などの機能向上を狙いとしたボー
ルペンの改良に関する。BACKGROUND OF THE INVENTION The present invention ensures smooth writing performance by utilizing the fact that the pressure of the spring, which is the writing portion of the ball held in the holder during writing, is weaker than the writing pressure required for writing. , When not writing, the ball, which is the writing part, is used as a valve to improve impact resistance and ink dry-up prevention performance, and to improve functions such as ink drop prevention when ink moves backward. Regarding
【０００２】[0002]
【従来の技術】一般的なボールペンでは筆記部であるボ
ールの周辺は筆記に必要なインクが流れ出るための隙間
が適宜設けられている。したがってその隙間からインク
の蒸発や輸送中の振動、落下、長期放置によるインクの
空気酸化劣化や洩れ出しや空気が入り込むことによるカ
スレの発生、また店頭でのペン立てで長期間、筆記部を
軸方向上方へ向けて保存（以後”上向き”と呼ぶ）する
ことで、インクが軸方向後方へ落ちてしまうインクドロ
ップなどの事故がしばしば見られる。従来、これらの問
題を解決するために、筆記具タイプの修正液などで見ら
れるチップの内部にスプリングを設けて対策した発明の
応用案（実開昭５５ー１７２１０４号、実開昭５７ー１
９３５７８号など）が知られているが、これらにはスプ
リング以外にもコストアップの著しい金属切削製の押し
棒が必要であったり、スプリングのみとした発明でも筆
記部のボールへの当接するストレート部をスプリングの
中心部から曲りなく伸ばすことはスプリングの製造方法
からでは非常に困難であり、製造時に相当な品質管理を
要求される上に、スプリングの端面はカットしたままで
あり、ごくわずかなストレート部の曲りでスプリングの
端面のエッジやバリがチップ内面に引っ掛かってしま
い、ボールが押圧されないトラブルも発生しやすいこと
などから、具体的には先端をまっすぐにセンター方向へ
矯正したり、先端のエッジを丸めるなどの２次、３次の
追加工が行なわれており、かなりのコストや労力が必要
である問題を抱えている。また組み立て時にも非常に小
さな部品で挿入する向きに差が少なく、向きの間違いや
引っ掛かってごくわずかに曲っても性能に問題が発生し
やすいため、チップ内に挿入しやすいスプリングの形状
や、以後の組み立て作業で曲げてしまったりしないよう
に、スプリングをチップ内にまず遊嵌する、などの要求
があった。またチップは金属を切削加工したり、樹脂製
の場合ではコアピンの抜き勾配が必要なため中心部に向
かって小径とする必要があり、スプリングはその最小径
よりも小さい必要が有り、インク収容管とチップとをつ
ないで内面でスプリングの後端を受ける継ぎ手やスプリ
ング受けなどの部品が必要となってさらにコストを上げ
る要因となっていた。2. Description of the Related Art In a general ball-point pen, a space around a ball which is a writing portion is appropriately provided so that ink necessary for writing flows out. Therefore, ink may evaporate from the gaps, vibration during transportation, drops, air oxidation deterioration of ink due to long-term storage, ink leakage due to leakage or air entrapment, and pen writing at the store for a long time. Accumulation such as ink drop in which the ink drops axially rearward is often seen by storing it upward in the direction (hereinafter referred to as "upward"). Conventionally, in order to solve these problems, an application proposal of the invention in which a spring is provided inside a tip found in a correction fluid of a writing instrument type etc. (Actual No. 55-172104, No. 57-1)
No. 93578), but these require a metal-cutting push rod that causes a significant cost increase in addition to the spring, and even in the invention using only the spring, the straight portion that abuts the ball of the writing portion. It is very difficult to bend the spring from the center of the spring due to the manufacturing method of the spring, and considerable quality control is required at the time of manufacturing, and the end surface of the spring remains cut, and a very slight straight Since the edge of the end face of the spring and the burr are caught on the inner surface of the chip due to the bending of the part, it is easy to have a problem that the ball is not pressed.Specifically, straighten the tip toward the center or The second and third additional machining such as rounding is done, and there is a problem that considerable cost and labor are required. That. In addition, even when assembled, there is little difference in the insertion direction with very small parts, and performance is likely to occur even if it is bent slightly even if it is misaligned or caught, so the shape of the spring easy to insert in the chip and There was a request to first loosely fit the spring into the chip so that it would not be bent during the assembly work. In addition, the tip needs to have a smaller diameter toward the center because the core pin is required to have a draft when the metal is machined or made of resin, and the spring must be smaller than the minimum diameter. It was necessary to provide parts such as a spring receiver and a joint that connects the chip and the chip to receive the rear end of the spring on the inner surface, which further increased the cost.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明は、主に
普及型のボールペンの改良を目的としており、筆記時の
スムーズな筆記を阻害することなく、インクの揮発によ
るドライアップ防止性能や、落下・輸送中の衝撃による
インク洩れ出しの防止性能や、店頭で長期上向き保存さ
れた場合などの空気流入によるインクドロップ防止性能
などボールペンにおける事故防止性能を確実に向上させ
たいという要望を満足させ、さらに従来の技術よりも製
造しやすく、一般的で安価なボールペンを提供するとい
う課題を解決することを目的とするものである。本発明
に於いて、先端ボールを押圧するスプリングは極めて弱
いもの（２〜２０ｇ程度）で、バネ部及びストレート部
がチップ内孔に対しせり部分が生じると性能が発揮され
ない。従って、チップ内孔は極力段部のない形状、又、
ホルダーの中心孔にストレート部が干渉なく挿入されて
先端ボールに微小な押圧力が作用するように段部を生じ
ない鋭角のテーパー、バリの影響を生じさせない為の中
心孔の後端に至らない深さの受け座などの配慮が必要と
なる。又、チップ内孔にスプリングを内蔵させてスプリ
ングの後端が変形を受けることなく抜出不能とする必要
がある。以上の条件を満足させるチップを一体に形成す
ることは加工精度上難しく、品質の安定化と生産性の低
下に起因するコストアップの問題がある。SUMMARY OF THE INVENTION Therefore, the present invention is mainly intended to improve a popular type ball-point pen, and has a dry-up prevention performance due to volatilization of ink and a drop property without disturbing smooth writing at the time of writing.・ Satisfies the desire to surely improve the accident prevention performance of ballpoint pens, such as the performance of preventing ink from leaking due to shock during transportation, and the performance of preventing ink drop due to the inflow of air when stored in a store for a long period of time. It is an object of the present invention to solve the problem of providing a general, inexpensive ballpoint pen that is easier to manufacture than conventional techniques. In the present invention, the spring that presses the tip ball is extremely weak (about 2 to 20 g), and if the spring portion and the straight portion have a protruding portion with respect to the inner hole of the chip, the performance is not exhibited. Therefore, the inner hole of the tip should have as few steps as possible, and
The straight part is inserted into the center hole of the holder without interference so that a slight pressing force acts on the tip ball.It does not form a stepped part.It does not reach the rear end of the center hole to prevent the effect of burr. It is necessary to consider the depth of the seat. Further, it is necessary to incorporate a spring in the chip inner hole so that the rear end of the spring cannot be extracted without being deformed. It is difficult to integrally form a chip that satisfies the above conditions in terms of processing accuracy, and there is a problem of cost increase due to stabilization of quality and reduction of productivity.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成する為
に、本発明のスプリング内蔵のボールペンは筆記部であ
るボールをスプリングのみでごく弱く押圧して、筆記時
にはボールとスプリングは軸後方へ移動して筆記に必要
なインクの流路を確保して一般的なボールペンと同様に
筆記可能なように構成される。チップは先端ボールを抱
持したホルダーとスプリングの後端が当接して抜出不能
とする筒部とが圧着されて構成される。従って、上述し
たようなチップの加工精度が容易となり、又、スプリン
グを抜出不能に内蔵することが容易となって品質が安定
化し、チップ形成の総合コストは安くなる。又、先端ボ
ールはφ０．５からφ１．２と小さい為ホルダーの内径
は最も小径となる部分はφ０．２からφ０．９であるの
でスプリングの線径をφ０．１ないしφ０．２程度とし
てボール当接部近辺をほぼ直線にしたストレート部を形
成する。又、先端ボールを抱持したホルダーの中心孔先
端の外郭に中心孔の後端に至らない深さの所要数の溝を
有した受け座を設け、且つ、中心孔の後端から拡大した
内孔の接合段部及びホルダーの後端に向かってステップ
状に拡大する内孔接合段部の必要箇所を略中心角が９０
°以下のテーパーで接続させて、更に、スプリングのバ
ネ部を中心部は軸方向後端面よりも小径にした上、スト
レート部をその小径部の外径とほぼ同一の外径から適宜
屈曲させて略軸心上に伸ばし、スプリングの挿入時にそ
の先端が内孔の段部、中心孔の段部又は受け座の溝に引
っ掛かるのを防止する。又、スプリングの軸方向後端面
を筒部の内径とほぼ同一か僅かに小さく設定してスプリ
ングの最大径とすることでストレート部が略軸心上に起
立するように成される。又、上記筒部を金属製とした場
合にはその後端をカシメや塑性変形により内側へ変形さ
せて抜け防止してスプリングを内蔵させる構造とした。
又、筒部を樹脂製とした場合には成形型で抜け止め段部
が形成される。In order to achieve the above object, the ball-point pen with a built-in spring of the present invention presses the ball, which is the writing part, only weakly with the spring, and the ball and the spring move to the axial rear during writing. Then, the flow path of the ink necessary for writing is secured and the writing is possible like a general ballpoint pen. The chip is formed by crimping a holder that holds the tip ball and a tubular portion that is incapable of being pulled out due to the rear end of the spring coming into contact. Therefore, the above-described processing accuracy of the chip is facilitated, and the spring is easily built in so that the spring cannot be pulled out, the quality is stabilized, and the total cost for forming the chip is reduced. Also, since the tip ball is small from φ0.5 to φ1.2, the inner diameter of the holder is φ0.2 to φ0.9 at the smallest diameter, so the wire diameter of the spring should be around φ0.1 to φ0.2. A straight portion is formed by forming a straight line near the contact portion. Further, a receiving seat having a required number of grooves with a depth that does not reach the rear end of the center hole is provided on the outer contour of the front end of the center hole of the holder that holds the front ball, and the inside of the holder is enlarged from the rear end of the center hole. Step toward the joining step of the hole and the rear end of the holder
The required central portion of the inner hole joining step that expands like a circle
Connect with a taper of ° or less, and further make the center of the spring part smaller in diameter than the rear end face in the axial direction, and bend the straight part appropriately from the outer diameter approximately the same as the outer diameter of the small diameter part. The spring extends approximately on the axis to prevent the tip of the spring from being caught in the step of the inner hole, the step of the central hole or the groove of the receiving seat when the spring is inserted. Further, the axial rear end surface of the spring is set to be substantially the same as or slightly smaller than the inner diameter of the cylindrical portion to make it the maximum diameter of the spring, so that the straight portion stands up substantially on the axial center. Further, when the cylindrical portion is made of metal, the rear end thereof is deformed inward by caulking or plastic deformation to prevent it from coming off and a spring is built therein.
Further, when the tubular portion is made of resin, a retaining step is formed by the molding die.
【０００５】[0005]
【実施例】以下、図示した実施例について詳説する。図
１及び図２は本発明の第１の実施例を示している。ま
ず、図に示すようにポリプロピレン樹脂製のチューブよ
りなる内部にインク７を保蔵するインク収容管６の内径
筆記部側に固着される圧入部５ａとチップ２が圧入固着
される孔５ｂを有する継ぎ手５には内部の略中央にイン
クの導孔５ｅを持つボール受け座５ｃを設け、チップ２
の軸方向後端とボール受け座５ｃとによって形成される
弁室内に遊嵌されたボール弁４によって通常の筆記時に
はインク収容管６から筆記部となる先端ボール１までを
連通する構造としたうえで上向きではボール弁４が継ぎ
手５の受け座５ｃに密接することによってインクの逆流
を防止した構造のボールペンであって、当該ボールペン
は通常は筆記軸となる軸筒（図示せず）に挿着して使用
される所謂ボールペンのリフィールを示したものであ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiments will be described below in detail. 1 and 2 show a first embodiment of the present invention. First, as shown in the figure, a joint having a press-fitting portion 5a fixed to the inner diameter writing portion side of an ink containing tube 6 for storing ink 7 and a hole 5b into which a tip 2 is press-fitted and fixed inside a polypropylene resin tube. 5 is provided with a ball receiving seat 5c having an ink guiding hole 5e substantially in the center thereof,
The ball valve 4 loosely fitted in the valve chamber formed by the axial rear end of the above and the ball receiving seat 5c connects the ink containing tube 6 to the tip ball 1 which is the writing portion during normal writing. In the upward direction, the ball valve 4 is in a structure in which the backflow of ink is prevented by the ball valve 4 being in close contact with the receiving seat 5c of the joint 5, and the ballpoint pen is usually attached to a shaft cylinder (not shown) which is a writing shaft. This shows the refill of a so-called ballpoint pen that is used in the past.
【０００６】このボールペンではインク７には通常使用
される油性ボールペンのインク又は静的には高い粘性を
有し、筆記時のボール１の回転によりインクの粘性が低
下してインクがスムーズに流出される剪断減粘性を有し
た所謂中粘度インクが充填され、さらにインク収容管６
のボールペン軸方向後方にはインクの揮発防止と流れ出
し防止のためのフォロア８と経時安定性と耐落下性能向
上のためのフォロア棒９を構成してある。In this ball-point pen, the ink 7 is an ink of an oil-based ball-point pen which is usually used or has a high static viscosity, and the viscosity of the ink is lowered by the rotation of the ball 1 during writing, and the ink is smoothly discharged. A so-called medium viscosity ink having a shear thinning property is filled, and the ink containing tube 6
A follower 8 for preventing volatilization and outflow of ink and a follower rod 9 for improving stability with time and drop resistance are formed on the rear side of the ball-point pen in the axial direction.
【０００７】図２には本発明のボールペンの筆記先端部
であるチップ２及びその内部を示している。チップ２は
筒部２ｂの先端にホルダー２ａを圧着して構成されてい
る。ホルダー２ａは筆記部である先端ボール１を抱持部
２ｃ（カシメにより形成）で抜止め支持され、先端ボー
ル１を受ける抱持部２ｃの受け内面によって回動自在に
遊嵌されている。又、ホルダー２ａ後端の圧入部２ｆに
は筒部２ｂが圧着されて、内部には先端ボール１に前端
面を接し、後端面には筒部２ｂの後端面の段部２ｅ（カ
シメにより形成）によってスプリング３が内部に遊閉さ
れており、このスプリング３はその後端部３ｃを筒部２
ｂの後端側内径とほぼ同じか僅かに小さい径として筒部
２ｂ内に挿入される。筒部２ｂの段部２ｅは金属製のパ
イプ材の後端面をカシメ等により塑性変形して形成され
る。FIG. 2 shows the tip 2 which is the writing tip of the ballpoint pen of the present invention and the inside thereof. The chip 2 is formed by crimping a holder 2a to the tip of a tubular portion 2b. The holder 2a holds and supports the tip ball 1 which is a writing portion by a holding portion 2c (formed by crimping), and is rotatably loosely fitted by a receiving inner surface of the holding portion 2c which receives the tip ball 1. Further, the cylindrical portion 2b is crimped to the press-fitting portion 2f at the rear end of the holder 2a, the front end surface is in contact with the front end ball 1, and the rear end surface has a step portion 2e (formed by caulking) on the rear end surface of the cylindrical portion 2b. ), The spring 3 is loosely closed inside, and the spring 3 has its rear end 3c at the cylindrical portion 2
It is inserted into the cylindrical portion 2b with a diameter substantially the same as or slightly smaller than the inner diameter of the rear end side of b. The step portion 2e of the tubular portion 2b is formed by plastically deforming the rear end surface of the metal pipe material by caulking or the like.
【０００８】又、ホルダー２ａの内面にバネ部が接触し
てバネ作用の動きが阻害されないため、組み立て時の挿
入や向きの検知をやりやすくするため、ホルダー２ａの
最小径となる中心孔２ｈを貫通して先端ボール１を押圧
するストレート部３ａを極力ホルダー２ａの中心から伸
ばすため、更に、ホルダー２ａは通常中心部の内孔が後
端部の内孔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、または全体が十分に
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にはその中心部に後端面３ｃよりも小径と
なる小径部３ｂを設けてあり、後端面３ｃと小径部３ｂ
の間はスプリング３のバネ性を有する部分であるがその
部分はテーパー形状または段付きの形状とする。更に、
ストレート部３ａは小径部３ｂの外径から延出して適宜
屈曲し、ほぼ軸心上に伸ばされてなる。Further, since the spring portion does not contact the inner surface of the holder 2a and the movement of the spring action is not hindered, the center hole 2h having the minimum diameter of the holder 2a is provided in order to facilitate the insertion and the detection of the orientation during assembly. Since the straight portion 3a that penetrates and presses the tip ball 1 is extended as much as possible from the center of the holder 2a, the holder 2a usually has an inner hole at the center smaller than the inner hole at the rear end. Considering that it is necessary to make the center smaller than the rear end side, or to make the whole spring outer diameter sufficiently small,
The spring 3 is provided with a small diameter portion 3b having a diameter smaller than that of the rear end surface 3c at the center thereof, and the rear end surface 3c and the small diameter portion 3b are provided.
The portion between the two is a portion of the spring 3 having a spring property, but the portion has a tapered shape or a stepped shape. Furthermore,
The straight portion 3a extends from the outer diameter of the small diameter portion 3b, bends appropriately, and extends substantially on the axis.
【０００９】又、ホルダー２ａは先端ボール１を抱持し
た中心孔２ｈ先端の外郭に中心孔の後端に至らない深さ
の所要数の溝２を有した受け座２ｄが設けられ、中心孔
２ｈ後端から拡大した内孔の接合段部及びホルダー２ａ
の後端に向かってステップ状に拡大する内孔接合部（内
孔の加工上生じる）が略中心角９０°以下のテーパーで
接続されている。従って、スプリング３挿入時にストレ
ート部３ａの前端面がホルダーの内面に引っ掛かる問題
が防止される。Further, the holder 2a is provided with a receiving seat 2d having a required number of grooves 2 having a depth that does not reach the rear end of the center hole, which is provided on the outer periphery of the tip of the center hole 2h holding the tip ball 1. Inner hole joining step portion enlarged from rear end 2h and holder 2a
Inner hole joints (which occur during processing of the inner holes) that expand in a stepwise manner toward the rear end are connected by a taper having a central angle of 90 ° or less. Therefore, the problem that the front end surface of the straight portion 3a is caught on the inner surface of the holder when the spring 3 is inserted is prevented.
【００１０】又、筆記時にボール弁４が筒部２ｂの後端
面側に入って密接してしまうとインクの流路が確保され
なくなって筆記できなくなるため、実施例に於いては継
ぎ手５のボール受け座５ｃを偏心させてボール弁４が前
進しても筒部２ｂの項端面の片側にのみ当接する構造と
しているが、筒部２ｂの段部２ｅは一般的な塑性変形加
工、具体的にはダイスによるプレス法や回転を利用した
ロール法や側面からのパンチ法など、適宜選択が可能で
あるが、後端面を全周カシメないで、１点ないし、多点
の塑性変形とするとボール弁４が筒部２ｂの後端面を塞
ぎにくくして、筆記時のインクの流路が大きくなって太
字ペンなどのインクの流量が多い事が要求されるボール
ペンでも十分なインク流量が確保できるという利点も生
じる。Further, when the ball valve 4 comes into close contact with the rear end face of the cylindrical portion 2b during writing, the ink flow path cannot be secured and writing cannot be performed. Although the seat 5c is eccentric so that even if the ball valve 4 moves forward, it comes into contact with only one side of the end face of the tubular portion 2b. However, the stepped portion 2e of the tubular portion 2b is generally plastically deformed, specifically, Can be selected as appropriate, such as a die pressing method, a rolling method using rotation, or a punching method from the side. However, if the rear end surface is not crimped all around, ball deformation is possible with one or multiple points of plastic deformation. 4 makes it difficult to close the rear end surface of the cylindrical portion 2b, and the flow path of ink during writing becomes large, so that a sufficient ink flow rate can be secured even with a ball-point pen that requires a large ink flow rate such as a bold pen. Also occurs.
【００１１】図３は本発明の第２の実施例を図示したも
のである。第１の実施例との相違点は筒部１０ａを樹脂
成形品と成してその先端にホルダー２ａを圧着したもの
である。此の場合にはスプリング３を抜出不能に内蔵す
る段部１０ｃが成形で形成されるのでカシメ等の加工が
削除され前記実施例に対し安価に構成される。FIG. 3 illustrates a second embodiment of the present invention. The difference from the first embodiment is that the cylindrical portion 10a is made of a resin molded product and the holder 2a is pressure-bonded to the tip thereof. In this case, since the stepped portion 10c in which the spring 3 is immovably incorporated is formed by molding, machining such as caulking is eliminated, and the construction is inexpensive compared to the above embodiment.
【００１２】図４は本発明の第３実施例を示したもので
ある。第２の実施例との相違点は、筒部１１ａの後端面
に所要箇所で溝部１１ｂを設け、図１に示す構成とした
時に弁室が偏心状になくてもボール弁４が後端面に当接
した時にインクがチップ１１内に流通するように成した
もので、此の場合継ぎ手５の弁室の形成が容易となる利
点がある。FIG. 4 shows a third embodiment of the present invention. The difference from the second embodiment is that the groove portion 11b is provided at a required position on the rear end surface of the tubular portion 11a and the ball valve 4 is provided on the rear end surface even if the valve chamber is not eccentric when the configuration shown in FIG. The ink is made to circulate in the chip 11 when they come into contact with each other. In this case, there is an advantage that the valve chamber of the joint 5 can be easily formed.
【００１３】又、図５及び図６は本発明と対比する為の
従来例を示しており、チップ２１の内孔には後端から順
次細径とした複数箇所の段部を有した長い孔が形成され
ている。又、チップ２１の内孔にスプリング２２を挿入
した後スプリングを抜出不能とする為に後端にカシメ部
２１ｂが形成されている。上述したように従来例による
ものは段部によりスプリング２２のバネ部の変位が阻害
される可能性がある。又、内孔の加工性が悪く精度維持
が難しく生産性も悪い。又、スプリング２２の挿入後に
後端をカシメるのでスプリングの後端面を変形させてし
まう問題が存在する。従って、コスト高となる問題があ
る。FIGS. 5 and 6 show a conventional example for comparison with the present invention, in which the inner hole of the chip 21 is a long hole having a plurality of step portions each having a diameter gradually decreasing from the rear end. Are formed. Further, after inserting the spring 22 into the inner hole of the tip 21, a caulking portion 21b is formed at the rear end so that the spring cannot be removed. As described above, in the conventional example, the step portion may hinder the displacement of the spring portion of the spring 22. In addition, the workability of the inner hole is poor and it is difficult to maintain accuracy, and the productivity is poor. Further, there is a problem that the rear end surface of the spring is deformed because the rear end is crimped after the spring 22 is inserted. Therefore, there is a problem of high cost.
【００１４】[0014]
【作用】第１の実施例に於いて、本発明の作用を説明す
る。筆記部である先端ボール１は球形状であることとホ
ルダー２ａの抱持部２ｃによってボール１を後方からス
プリング３により押圧しておくとバルブが閉じられた状
態となって外気とボールペン内部とが遮断されることに
より、インク７の揮発によるドライアップ防止や衝撃、
落下による空気の進入防止やインク７の洩れ出し防止や
空気によるペン先付近のインク劣化の防止、などが期待
できるようになる。The operation of the present invention will be described with reference to the first embodiment. The tip ball 1 which is the writing portion has a spherical shape, and when the holding portion 2c of the holder 2a presses the ball 1 from the rear side by the spring 3, the valve is closed and the outside air and the inside of the ballpoint pen are separated from each other. By being blocked, the dry-up prevention and impact due to the volatilization of the ink 7
It can be expected to prevent the entry of air due to falling, the leakage of ink 7, and the prevention of ink deterioration near the pen tip due to air.
【００１５】筆記時の筆記に要する筆記圧はボールペン
の種類によって違いは有るが一般的に５０ｇから５００
ｇである。本発明の先端ボール１を押圧するスプリング
３の設定押力は２ｇから１００ｇ、望ましくは５ｇから
２０ｇに設定されている為、実際の筆記時には先端ボー
ル１と抱持部２ｃによるバルブ機構は押し広げられた状
態となって通常のボールペン同様にインク７が流れ出
し、筆記が可能である。The writing pressure required for writing at the time of writing varies depending on the type of ballpoint pen, but is generally 50 g to 500 g.
It is g. Since the set pressing force of the spring 3 for pressing the tip ball 1 of the present invention is set to 2 g to 100 g, preferably 5 g to 20 g, the valve mechanism formed by the tip ball 1 and the holding portion 2c spreads during actual writing. In this state, the ink 7 flows out like a normal ballpoint pen, and writing is possible.
【００１６】筆記が終了してボールペンを紙面から離し
た瞬間には本発明のスプリングの力により筆記部のバル
ブが瞬時に閉じられて再び耐ドライアップ性能、耐衝撃
性能、耐空気進入防止性能、インク洩れ出し防止性能が
発揮され、各種の事故防止を行う。At the moment when the writing is finished and the ball-point pen is separated from the paper surface, the valve of the writing portion is instantly closed by the force of the spring of the present invention, and the dry-up resistance, impact resistance, and air ingress prevention performance are re-established. Ink leakage prevention performance is demonstrated to prevent various accidents.
【００１７】上向きで筆記した場合の空気巻き込み、イ
ンクの逆流を防止できるボール弁４と弁構造を持つ継ぎ
手５を構成した逆流防止機構を設けたものは、上向きに
してボール弁４が弁室に密接されることによりインク７
の移動を防止するが、上向きではなく、しかも筆記して
いない時に空気の巻き込みやインクの移動を筆記部のの
バルブ機構で防止する本発明と併用する事でさらに、安
全性がアップして、特にインクの移動しやすい剪断減粘
性インクを使用した所謂中粘度ボールペンでは本発明が
効果的に逆流防止機構の性能をアップさせる。A ball valve 4 which can prevent air entrainment and ink backflow when writing upwards and a backflow prevention mechanism which is composed of a joint 5 having a valve structure are provided with the ball valve 4 facing upwards in the valve chamber. Ink 7 by close contact
Although it prevents the movement of the ink, it is not upward, and further safety is improved by using it together with the present invention that prevents the entrainment of air and the movement of ink by the valve mechanism of the writing portion when not writing. Particularly in a so-called medium viscosity ballpoint pen using a shear thinning ink in which the ink easily moves, the present invention effectively improves the performance of the backflow prevention mechanism.
【００１８】また、本発明では、スプリング３のストレ
ート部３ａがスプリング製造時に真っ直ぐに出しやすい
小径部３ｂのコイル外径から僅かに屈曲させて軸心上に
設けている為に製造時に心曲りが発生しにくい。又、ホ
ルダー２ａを筒部２ｂに圧着してチップ２を構成してい
るのでチップの加工精度が上がり品質が向上する。又、
生産性も良い。Further, according to the present invention, since the straight portion 3a of the spring 3 is slightly bent from the coil outer diameter of the small diameter portion 3b, which is easy to be straightened when the spring is manufactured, and is provided on the axial center, the bending of the core during manufacturing is prevented. Hard to occur. Also, since the holder 2a is pressure-bonded to the cylindrical portion 2b to form the chip 2, the machining accuracy of the chip is improved and the quality is improved. or,
Productivity is also good.
【００１９】[0019]
【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、チップの内部に内蔵されたスプリング
と筆記部である先端ボールのバルブ機構によって筆記時
の性能にはまったく影響がない状態で、筆記していない
場合の耐インクドライアップ防止性能、耐落下衝撃性
能、耐インクボタ落ち性能、耐インク洩れ出し性能を大
幅にアップすることが可能で、筆記完了後の紙面からボ
ールペンを離した瞬間から効果が期待できるものであ
る。又、チップをホルダーと筒部の二部品で構成するこ
とで、チップの加工精度及び生産性が向上して安価とな
るものである。The construction and operation of the ball-point pen of the present invention are as described above, and the performance of writing is not affected at all by the spring built in the tip and the valve mechanism of the tip ball which is the writing portion. With this, it is possible to greatly improve the ink dry-up prevention performance, drop impact resistance, ink spill resistance, ink leakage resistance when not writing, and remove the ball-point pen from the paper surface after writing. The effect can be expected from the moment. Further, by constructing the chip with two parts, the holder and the tubular part, the processing accuracy and productivity of the chip are improved and the cost is reduced.
【図１】本発明の第１実施例であるボールペンの全体を
示す縦断面図である。FIG. 1 is a vertical cross-sectional view showing an entire ball-point pen that is a first embodiment of the present invention.
【図２】本発明の第１実施例であるボールペンの筆記先
端部であるチップ内部を示す縦断面図である。FIG. 2 is a vertical cross-sectional view showing the inside of the tip which is the writing tip of the ballpoint pen of the first embodiment of the present invention.
【図３】本発明の第２実施例であるボールペンのチップ
内部を示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing the inside of the tip of a ball-point pen that is a second embodiment of the present invention.
【図４】本発明の第３実施例であるボールペンのチップ
内部を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing the inside of the tip of the ball-point pen which is the third embodiment of the present invention.
【図５】本発明と対比した従来例であるボールペンの全
体を示す縦断面図である。FIG. 5 is a vertical cross-sectional view showing an entire conventional ballpoint pen, which is compared with the present invention.
【図６】従来例のボールペンのチップ内部を示す縦断面
図である。FIG. 6 is a vertical cross-sectional view showing the inside of a tip of a conventional ballpoint pen.
１ 先端ボール ２ チップ ２ａ ホルダー ２ｂ 筒部 ２ｃ 抱持部 ２ｄ 受け座 ２ｅ 段部 ２ｆ 圧入部 ２ｇ テーパー部 ２ｈ 中心孔 ３ スプリング ３ａ ストレート部 ３ｂ 小径部 ３ｃ 後端部 ４ ボール弁 ５ 継ぎ手 ５ａ 圧入部 ５ｂ 孔 ５ｃ ボール受け座 ５ｄ 溝部 ５ｅ 導孔 ６ インク収容管 ７ インク ８ フォロア ９ フォロア棒 １０ チップ １０ａ 筒部 １０ｂ 圧入部 １０ｃ 段部 １１ チップ １１ａ 筒部 １１ｂ 溝部 ２０ 先端ボール ２１ チップ ２１ａ 圧入部 ２１ｂ カシメ部 ２２ スプリング ２２ａ ストレート部 ２２ｂ 小径部 ２３ 継ぎ手 ２３ａ 圧入部 ２３ｂ 孔 ２３ｃ ボール受け座 ２３ｄ 溝部 ２３ｅ 導孔 ２４ ボール弁 1 tip ball 2 chips 2a holder 2b tube 2c holding part 2d seat 2e step 2f Press-fitting section 2g taper part 2h center hole 3 springs 3a Straight part 3b small diameter part 3c rear end 4-ball valve 5 joints 5a Press-fitting section 5b hole 5c ball seat 5d groove 5e Guide hole 6 Ink storage tube 7 ink 8 followers 9 Follower Stick 10 chips 10a tube part 10b Press-fitting part 10c step 11 chips 11a tube 11b groove 20 tip ball 21 chips 21a Press-fitting section 21b Caulking part 22 spring 22a Straight part 22b Small diameter part 23 joint 23a Press-fitting section 23b hole 23c ball seat 23d groove 23e guide hole 24 ball valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平６−67080（ＪＰ，Ｕ) 実開 昭62−30684（ＪＰ，Ｕ) 実開 平６−68874（ＪＰ，Ｕ) 実公 昭54−15703（ＪＰ，Ｙ２) 特許3209477（ＪＰ，Ｂ２) 特許3148504（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B43K 1/08 B43K 7/00 - 7/12 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Actual flat 6-67080 (JP, U) Actual open Sho 62-30684 (JP, U) Actual flat 6-68874 (JP, U) Actual public 54- 15703 (JP, Y2) Patent 3209477 (JP, B2) Patent 3148504 (JP, B2) (58) Fields investigated (Int.Cl. 7 , DB name) B43K 1/08 B43K 7/ 00-7/12
Claims (5)
リングを内蔵したチップと、チップの後方に継ぎ手と、
インクとインクの後端にフォロアが設けられたインク収
容管を有するボールペンに於いて、 当該チップは、先端に筆記部となる先端ボールを抱持し
たホルダーの後方に筒部が圧着されてなり、そのチップ
内に、先端ボールを抱持部の内面に押圧するように当接
するストレート部と、該ストレート部の後方にコイル状
のバネ部が設けられたスプリングが内蔵されて、そのス
プリングの後端が筒部内側の段部に当接して抜出不能と
なるように設けられて成るボールペン。 1. A spout for pressing a tip ball to the front end.
A chip with a built-in ring and a joint behind the chip,
Ink storage with a follower at the end of the ink and the ink
In a ball-point pen having a container , the tip holds a tip ball that is a writing section at the tip.
The tube is crimped to the rear of the holder and its tip
Abut the tip ball inside so that it presses against the inner surface of the holding part.
Straight part and a coil shape behind the straight part
The built-in spring with the spring part of
The rear end of the pulling comes into contact with the step inside the tube and it cannot be removed.
A ballpoint pen that is configured to be.
先端の外郭に中心孔の後端に至らない深さの所要数の溝
を有した受け座を設け、中心孔の後端から拡大した内孔
の接合段部及びホルダーの後端に向かってステップ状に
拡大する内孔接合段部の少なくとも中心孔の後端から拡
大した内孔の接合段部が略中心角９０°以下のテーパー
部となるように接続されて構成されたことを特徴とする
上記請求項１記載のボールペン。2. A holder having a required number of grooves having a depth that does not reach the rear end of the center hole is provided on the outer contour of the front end of the center hole of the holder holding the front ball, and is enlarged from the rear end of the center hole. The stepwise expansion of the inner hole joining step and the rear end of the holder expands at least from the rear end of the center hole of the inner hole joining step.
Tapered joint of large inner hole with a central angle of 90 ° or less
The ball-point pen according to claim 1, wherein the ball-point pen is connected so as to form a part .
と継ぎ手の先端にチップが固着されたボールペンに於い
て、継ぎ手の軸心付近にはチップの後端面に対峙するボ
ール受け座とインク収容管に連通する導孔を備えた弁室
が設けられ、弁室内にはボール弁が遊嵌されて、ペン体
が上向きとなってボール弁がボール受け座に密接して、
導孔を閉塞した時にインクの逆流が防止され、ペン体が
下向きとなる筆記時にはボール弁がチップの後端に当接
して、チップ内にインクが流入する経路が確保されて筆
記可能となる逆流防止機構を備えたことを特徴とする上
記請求項１記載のボールペン。3. A ball-point pen having a joint provided at the tip of the ink containing tube and a tip fixed to the tip of the joint, and a ball receiving seat and an ink containing portion facing the rear end surface of the tip near the axis of the joint. A valve chamber with a guide hole communicating with the pipe
Is provided, the ball valve is loosely fitted in the valve chamber, the pen body is directed upward, and the ball valve is in close contact with the ball receiving seat,
Backflow of ink is prevented when the guide hole is blocked, and the pen valve faces downward during writing, and the ball valve contacts the rear end of the tip, ensuring a path for ink to flow into the tip and allowing backwriting. The ball-point pen according to claim 1, further comprising a prevention mechanism.
設けられ、ペン体が下向きでボール弁がチップの後端に
偏倚して当接し、チップ内にインクが流入可能な流路が
形成されるように成した上記請求項３記載のボールペ
ン。4. A valve chamber is appropriately eccentrically provided with respect to the axis of the tip, the pen body is directed downward, and the ball valve is provided at the rear end of the tip.
4. The ball-point pen according to claim 3, wherein the ball-point pen is biased and abutted to form a flow path into which ink can flow.
所で溝部を設けたことを特徴とする上記請求項３記載の
ボールペン。5. The ball-point pen according to claim 3, wherein a groove portion is provided at a required position on the rear end surface of the cylindrical portion forming the tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29201594A JP3514531B2 (en) | 1994-11-02 | 1994-11-02 | Ballpoint pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29201594A JP3514531B2 (en) | 1994-11-02 | 1994-11-02 | Ballpoint pen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08132781A JPH08132781A (en) | 1996-05-28 |
| JP3514531B2 true JP3514531B2 (en) | 2004-03-31 |
Family
ID=17776428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29201594A Expired - Lifetime JP3514531B2 (en) | 1994-11-02 | 1994-11-02 | Ballpoint pen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3514531B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3148504B2 (en) | 1994-03-16 | 2001-03-19 | 三菱鉛筆株式会社 | Ballpoint pen |
| JP3209477B2 (en) | 1994-07-05 | 2001-09-17 | 三菱鉛筆株式会社 | Ballpoint pen |
-
1994
- 1994-11-02 JP JP29201594A patent/JP3514531B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3148504B2 (en) | 1994-03-16 | 2001-03-19 | 三菱鉛筆株式会社 | Ballpoint pen |
| JP3209477B2 (en) | 1994-07-05 | 2001-09-17 | 三菱鉛筆株式会社 | Ballpoint pen |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08132781A (en) | 1996-05-28 |
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