JPH10181275A - Writing implement - Google Patents

Writing implement

Info

Publication number
JPH10181275A
JPH10181275A JP8355827A JP35582796A JPH10181275A JP H10181275 A JPH10181275 A JP H10181275A JP 8355827 A JP8355827 A JP 8355827A JP 35582796 A JP35582796 A JP 35582796A JP H10181275 A JPH10181275 A JP H10181275A
Authority
JP
Japan
Prior art keywords
tip
ink
ball
writing
barrel
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.)
Granted
Application number
JP8355827A
Other languages
Japanese (ja)
Other versions
JP3561384B2 (en
Inventor
Seiichi Kobayashi
小林  清一
Original Assignee
Mitsubishi Pencil Co Ltd
三菱鉛筆株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Pencil Co Ltd, 三菱鉛筆株式会社 filed Critical Mitsubishi Pencil Co Ltd
Priority to JP35582796A priority Critical patent/JP3561384B2/en
Publication of JPH10181275A publication Critical patent/JPH10181275A/en
Application granted granted Critical
Publication of JP3561384B2 publication Critical patent/JP3561384B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To use without the direct flow and back flow of ink and writing scratch in a writing implement which is filled with water base ink having shear- reduced viscosity or oil base ink of low viscosity and has ball point pen tips in front of the end of a shaft cylinder. SOLUTION: A spring 20 is set in the inner hole of each of tips 6, 6', the back of a tip ball 7 is pushed by the end of the spring 20 to make the ball 7 contact the inner surface of a ball holding part at the end of the tip, each of the tips 6, 6' is fixed closely engagingly to the mounting hole of a holder 8, the holder 8 is fixed at the end of a joint 3 in front of the shaft cylinder, tip rear ends, a valve chamber communicating with an ink chamber, and a leading hole are mounted on the axis of the joint 3, a ball valve 5 is engaged loosely in the valve chamber, and the ball valve 5 is installed to close the lead hole with the tips directed upward.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は軸筒の一端に複数のボー
ルペンチップを備えた筆記具に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument provided with a plurality of ballpoint pens at one end of a barrel.

【0002】[0002]

【従来の技術】一般に剪断減粘性を有した水性インキを
使用したボールペン(通称、中粘度ボールペンと呼ばれ
ている)及び低粘度の油性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ってインキ漏れ(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、又、必要
によりフォロア棒がフォロア内に遊挿されて設けられて
いる。しかしながら、フォロアを設けても上向き筆記を
した時にはチップの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。
2. Description of the Related Art In general, ballpoint pens using water-based inks having shear-thinning properties (commonly called medium-viscosity ballpoint pens) and ballpoint pens using low-viscosity oil-based inks have a large amount of ink flowing out (writing). (In order to increase the density) The diameter of the ink storage tube is increased to increase the amount of ink loaded. Further, since the viscosity of the ink is smaller than that of the oil-based 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 reason, the ink usually moves following the ink consumption at the time of writing at the rear end of the ink, but a grease-like follower that suppresses the backflow of the ink due to its own weight or impact, and if necessary, a follower A rod is loosely inserted in the follower. However, even when the follower is provided, if the ink on the back surface of the tip ball of the chip runs out when writing upward, there is a danger that the ink and the head will be added directly, causing a remarkable 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.

【0003】軸筒の両端に2種類の筆記体を備えた従来
の筆記具は軸の全長が長くなる為に一方の筆記体は短寸
になっている。シャープペンシルを短くすると、芯ケー
スの長さが短くなり市場で入手可能な芯が使用出来ない
問題が生じる。従って、一方をシャープペンシル、他方
をボールペンとした場合にはボールペンを短くしてお
り、筆記寿命が短いのが実情となっている。
In a conventional writing instrument having two types of writing elements at both ends of a shaft cylinder, one of the writing elements is short because the entire length of the shaft is long. When the mechanical pencil is shortened, the length of the lead case is shortened, which causes a problem that commercially available leads cannot be used. Therefore, when one is a mechanical pencil and the other is a ballpoint pen, the ballpoint pen is shortened, and the actual writing life is short.

【0004】[0004]

【発明が解決しようとする課題】本発明の課題は、イン
キの直流及び逆流が防止され、ボテが少なく描線の濃い
中粘度ボールペン又は低粘度の油性ボールペンの適用を
可能とし、又、軸筒の一端に複数のボールペンのチップ
を備えて異種の描線巾を有した筆記を可能とすることに
ある。又、軸筒の他端にシャープペンシルが設けられた
携帯性の良い両頭複式の筆記具を提供可能とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a medium-viscosity ballpoint pen or a low-viscosity oilpoint ballpoint pen which prevents direct current and backflow of ink, has a small number of dents, and has a deep drawing line. An object of the present invention is to provide writing with different drawing widths by providing a plurality of ballpoint pen tips at one end. Further, it is possible to provide a double-ended double-headed writing instrument with good portability in which a mechanical pencil is provided at the other end of the barrel.

【0005】[0005]

【課題を解決するための手段】本発明は、軸筒の先方に
複数のボールペンのチップがホルダーを介して固着さ
れ、後方のインキ室に基本的には低粘度であるが、筆記
時の先端ボールの回転で粘度がより低下して流出される
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
ンキが充填され、インキの後端に筆記に伴うインキの消
耗に追随して移動するフォロアが設けられて成る筆記具
に於いて、前記チップのそれぞれの内孔にスプリングが
内装されて、そのスプリング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先端のボール抱持部の内
面に密接され、更に、それぞれのチップがホルダーの取
付け孔に密嵌状に固着されると共に軸筒先方の継ぎ手の
先端にホルダーが固着されて、継ぎ手の軸心には、チッ
プ後端とインキ室を連通する弁室と導孔が設けられその
弁室内にボール弁が遊嵌されて、チップ上向きでボール
弁が導孔を密閉するように設けられて成る。
According to the present invention, a tip of a plurality of ballpoint pens is fixed to the front of a barrel via a holder, and basically has a low viscosity in a rear ink chamber. A follower that is filled with a water-based ink or a low-viscosity oil-based ink having a so-called shear-thinning viscosity, which has a lower viscosity due to the rotation of the ball, and moves at the rear end of the ink following the consumption of the ink accompanying writing. In a writing instrument provided with a spring, a spring is provided in each of the inner holes of the tip, and the tip of the spring presses the back surface of the tip ball so that the tip ball contacts the inner surface of the ball holding portion at the tip of the tip. The chips are closely attached, and each chip is firmly fixed to the mounting hole of the holder, and the holder is fixed to the tip of the joint at the end of the shaft cylinder.The tip of the chip and the ink chamber are attached to the axis of the joint. The valve chamber and the bore hole for passing is loosely fitted ball valve in the valve chamber is provided, comprising provided so that the ball valve is sealed to the bore hole in the chip upward.

【0006】軸筒の後端からインキ室の前方に向かって
前端を閉塞した二重筒状の内筒部が設けられ、内筒部の
内孔にシャープペンシルの芯ケースが収容されると共に
前記軸筒が後軸筒の後方に軸推移可能に装着されて、軸
筒の軸推移に伴い後軸筒の前端に配設されたシャープペ
ンシル機構部を連動させて芯を繰り出し可能とする。
[0006] A double-tubular inner cylinder portion having a front end closed from the rear end of the shaft cylinder toward the front of the ink chamber is provided, and a lead case of a mechanical pencil is accommodated in an inner hole of the inner cylinder portion. The barrel is mounted on the rear of the rear barrel so as to be able to move in the axial direction, and a mechanical pencil mechanism disposed at the front end of the rear barrel is linked with the axial movement of the barrel so that the lead can be extended.

【0007】[0007]

【実施例】図1及び図2は本発明の実施例を示したもの
である。軸筒1は樹脂成形品(通常は透明樹脂)で、段
部1hの前方に先筒部1a、後方に後筒部1bが形成さ
れ、後筒部1bの後端から内孔1g(インキ室となる)
の前方に向かって後端を閉塞した二重筒状の内筒部1c
が、後筒部1bの後端内周と内筒部1cの外周との間に
所要箇所のリブ1eで一体に接合され、リブとリブとの
間で内孔1gから後筒部1bの後端に貫通した通気溝1
fが形成されている。尚、内筒部1cを別体で形成し
て、後筒部1bの内周又は内筒部1cの外周の何れかに
所要箇所のリブを設けて相互間を接合することも可能で
ある。
1 and 2 show an embodiment of the present invention. The shaft cylinder 1 is a resin molded product (usually a transparent resin). The front cylinder 1a is formed in front of the step 1h and the rear cylinder 1b is formed in the rear. Becomes
Double cylindrical inner cylinder 1c with its rear end closed toward the front
Are integrally joined with a required portion of a rib 1e between an inner periphery of a rear end of the rear cylinder portion 1b and an outer periphery of the inner cylinder portion 1c. Vent groove 1 penetrating the end
f is formed. It is also possible to form the inner cylinder part 1c as a separate body, provide a rib at a required portion on either the inner periphery of the rear cylinder part 1b or the outer periphery of the inner cylinder part 1c, and join them together.

【0008】実施例に於いて、継ぎ手は前継ぎ手2と後
継ぎ手3の接合で構成される。前継ぎ手2は、先方に先
細テーパー状の外周部と先端に内孔2aを有し、後方に
軸部2bを一体に有した樹脂成形品で形成されている。
又、軸部2b後端に開口した内孔前端の周壁に所要数の
リブ2dが設けられ、リブとリブとの間には隙間(溝)
が形成されている。又、前記内孔前端と内孔2aの後端
との間が第2の導孔2cで連通されている。
In the embodiment, the joint is formed by joining a front joint 2 and a rear joint 3. The front joint 2 is formed of a resin molded product having a tapered outer peripheral portion at the front and an inner hole 2a at the tip, and integrally having a shaft portion 2b at the rear.
A required number of ribs 2d are provided on the peripheral wall at the front end of the inner hole opened at the rear end of the shaft portion 2b, and a gap (groove) is provided between the ribs.
Are formed. A second guide hole 2c communicates between the front end of the inner hole and the rear end of the inner hole 2a.

【0009】又、後継ぎ手3は、後方に軸部3bを有
し、先端に内孔3aが形成され、内孔3aの後端にはテ
ーパー状又は球面状のボール受け座3cとボール受け座
3cの後方に軸筒1の内孔1gと連通する第1の導孔3
dが形成されている。
The rear joint 3 has a shaft portion 3b at the rear, an inner hole 3a formed at the tip, and a tapered or spherical ball receiving seat 3c and a ball receiving seat at the rear end of the inner hole 3a. 3c, a first conducting hole 3 communicating with the inner hole 1g of the barrel 1
d is formed.

【0010】一方、チップ6、6`はインキ流入可能な
チャンネルを有した座に先端ボール7が略当接した状態
で先端ボール7が回転自在に抱持されるようカシメられ
ている。(実施例では2種のチップで示している)又、
チップはパイプ状で上記チャンネルは側面の3箇所のポ
ンチで内方に膨出部を形成して得られる。無論、先端に
テーパー部を有した砲弾形状であってもよい。
On the other hand, the tips 6, 6 # are caulked so that the tip ball 7 is rotatably held with the tip ball 7 substantially in contact with a seat having a channel into which ink can flow. (In the embodiment, two types of chips are shown.)
The tip is in the form of a pipe, and the channel is obtained by forming an inward bulge with three punches on the side. Of course, it may be a shell shape having a tapered portion at the tip.

【0011】夫々のチップは筒状のホルダー8の内側に
周状に配設され、又、ホルダー8は上記前継ぎ手2の内
孔2aに固着される。
Each chip is circumferentially disposed inside a cylindrical holder 8, and the holder 8 is fixed to the inner hole 2 a of the front joint 2.

【0012】又、夫々のチップ内孔6bには細径のスプ
リング20が嵌挿される。スプリング20はチップ6、
6`の軸部後端をカシメ等の手段で、或いは、捲線部2
0bの後端部をチップ内孔6bよりやや大きめと成して
圧入状に食いつかせて後端が抜出不能となるように設け
られる。又、スプリング20の先方には直線状の棒軸部
20aが形成され、その先端が先端ボール7の背面に押
圧状に当接する。又、先端ボール7はその押圧でチップ
のボール抱持部6cの内縁に密接状態となる。従って、
チップ下向きで先端ボール7からインキが滲み出る(直
流)問題が防止される。この手段は粘性が小さく表面張
力が小さいインクやハードな環境対応(温度上昇、衝
撃)に適用される。又、チップ6内孔に先端ボール7の
背面を押圧するスプリングだけ設ければ通常はインキの
直流及び逆流が防止される。しかしながら、上向き筆記
の繰り返しや先端ボールとチップのボール抱持部の内面
との密接部が不完全(異物の混入、外力による変形)な
場合には逆流現象を生じ、筆記掠れ、終には筆記不能と
成る可能性があり、その防止手段として弁室4にボール
弁5を併設することが望ましい。
A small-diameter spring 20 is fitted into each of the chip inner holes 6b. Spring 20 is tip 6,
The rear end of the 6 mm shaft is caulked or the like, or the winding 2
The rear end of Ob is made slightly larger than the chip inner hole 6b, and is provided so that the rear end cannot be pulled out by press-fitting. A linear rod portion 20a is formed in front of the spring 20, and the tip of the rod portion 20a presses against the rear surface of the tip ball 7 in a pressing manner. The tip ball 7 is brought into close contact with the inner edge of the ball holding portion 6c of the chip by the pressing. Therefore,
The problem that the ink oozes from the tip ball 7 downward (DC) with the chip facing downward is prevented. This means is applied to ink having a low viscosity and a small surface tension or to a hard environment (temperature rise, impact). In addition, if only a spring for pressing the back surface of the tip ball 7 is provided in the inner hole of the tip 6, the direct current and the backflow of the ink are normally prevented. However, when the upward writing is repeated or the close contact between the tip ball and the inner surface of the ball holding portion of the chip is incomplete (contamination of foreign substances, deformation due to external force), a backflow phenomenon occurs, and the writing is rubbed. There is a possibility that the ball valve 5 cannot be used, and it is desirable to provide a ball valve 5 in the valve chamber 4 as a preventive means.

【0013】上記後継ぎ手3先端の内孔3aに前継ぎ手
2後方の軸部2bが圧着されて相互間に弁室4が形成さ
れる。尚、その際に弁室4内にはボール弁5が遊嵌され
る。又、後継ぎ手3の軸部3bが軸筒の先筒部1aの内
孔に止着される。
A shaft portion 2b behind the front joint 2 is press-fitted into an inner hole 3a at the end of the rear joint 3 to form a valve chamber 4 therebetween. At this time, the ball valve 5 is loosely fitted in the valve chamber 4. Further, the shaft portion 3b of the rear joint 3 is fixed to the inner hole of the front tube portion 1a of the shaft tube.

【0014】又、軸筒1の内孔1gには静的には高い粘
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水性インキ又は
低粘度の油性インキ9が充填され、インキ9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10が充填される。又、フォロ
ア10内にそれと略同等の比重を有する樹脂製で筒状の
従動体11が浸漬され、且つ従動体11は上記内筒部1
cにフォロア10を介して遊嵌状態と成されている。
尚、従動体11は必要により(インキ収容部の断面径が
大きく、インキのヘッドが大きくなる。又、インキの粘
性が低くインキのヘッドが支えきれない、フォロアが衝
撃で変形し易いなどの場合など)に設けられる。以上に
より、チップ側が下向きの時に前記ボール弁5が前記リ
ブ2dの後端に当接して、インキが第1の導孔3d、弁
室4、第2の導孔2c、チップ内孔に流入し先端ボール
7の背面まで誘導される。
An aqueous ink having a shear-thinning viscosity, in which the inner hole 1g of the barrel 1 has a statically high viscosity and the viscosity is reduced by rotation of the ball during writing so that the ink can flow out. Alternatively, a low-viscosity oil-based ink 9 is filled, and the rear end of the ink 9 is filled with a grease-like follower 10 that can move in contact with the ink surface as the ink is consumed. A cylindrical follower 11 made of resin having a specific gravity substantially equal to that of the follower 10 is immersed in the follower 10, and the follower 11 is
c is loosely fitted via the follower 10.
The driven body 11 may be provided as necessary (in the case where the cross-sectional diameter of the ink storage portion is large and the ink head is large. In addition, the ink viscosity is so low that the ink head cannot be supported or the follower is easily deformed by impact. Etc.). As described above, when the tip side is downward, the ball valve 5 comes into contact with the rear end of the rib 2d, and ink flows into the first guide hole 3d, the valve chamber 4, the second guide hole 2c, and the chip inner hole. It is guided to the back of the tip ball 7.

【0015】又、実施例に於いて、継ぎ手を前継ぎ手2
と後継ぎ手3で設けているが、設計都合であり、無論一
体で構成することも可能である。又、継ぎ手と軸筒1を
一体に構成することも可能である。その場合には、イン
キ充填等の都合から前述した内筒部1cは軸筒1に対し
別体で取り付ける必要がある。
Further, in the embodiment, the front joint 2
Although it is provided with the rear joint 3, it is possible for convenience of design, and it is also possible to configure it integrally. Further, the joint and the barrel 1 may be integrally formed. In this case, it is necessary to separately attach the above-described inner cylinder portion 1c to the shaft cylinder 1 for ink filling and the like.

【0016】軸筒1は後軸筒14の前方から嵌挿され
て、上記段部1hが後軸筒14後端の内段部14aに当
接され、先筒部1aが後軸筒14の後方に貫出される。
又、上記内筒部1cの内孔1dにはシャープペンシル1
5後方の芯ケース15bが嵌挿される。又、芯ケース1
5bの後端が内筒部1cの前端底部に略当接状態と成さ
れる。尚、シャープペンシル15は前方にシャープペン
シル機構部15aが、後方部に芯ケース15bが設けら
れて成り、基本的には通常よく知られたチャック機構を
有するノック式のシャープペンシルと同じ構成である。
The barrel 1 is inserted from the front of the rear barrel 14, the step 1 h is in contact with the inner step 14 a at the rear end of the rear barrel 14, and the front barrel 1 a is connected to the rear barrel 14. It is pierced backward.
In addition, a mechanical pencil 1 is inserted into the inner hole 1d of the inner cylindrical portion 1c.
5 The lead case 15b at the rear is inserted. Also, lead case 1
The rear end of 5b is substantially in contact with the bottom of the front end of the inner cylinder 1c. The mechanical pencil 15 is provided with a mechanical pencil mechanism 15a at the front and a lead case 15b at the rear. The mechanical structure is basically the same as that of a knock mechanical pencil having a well-known chuck mechanism. .

【0017】又、シャープペンシル機構部15aは口金
16に固定され(図示せず)、口金16は後軸筒14の
前端に螺合されて固定される。又、その状態で芯ケース
15bを前後動した時にはチャック機構部が連動して芯
を繰り出し可能とする。尚、この状態で軸筒1は前記芯
ケース15bの後端が内筒部1cの前端底部に当接して
後方に附勢されるが、後筒部1bの後端と口金16の後
端との間にスプリングを附勢(図示せず)して、シャー
プペンシル15とは独立した状態で軸筒1を後軸筒14
の後端に附勢するようにも構成される。又、軸筒の先筒
部1aには先端ボール7をシールする栓体13を備えた
キャップ12が着脱可能に止着される。又、インナーキ
ャップ12bの後端孔に消しゴム17が止着される。
The mechanical pencil mechanism 15a is fixed to a base 16 (not shown), and the base 16 is screwed and fixed to the front end of the rear barrel 14. Further, when the lead case 15b is moved back and forth in this state, the chuck mechanism is linked to allow the lead to be drawn out. In this state, the rear end of the core case 15b abuts against the bottom of the front end of the inner cylindrical portion 1c to be urged rearward in this state. A spring (not shown) is urged between the rear barrel 14 and the rear barrel 14 in a state independent of the mechanical pencil 15.
It is also configured to bias toward the rear end. A cap 12 having a plug 13 for sealing the distal end ball 7 is detachably fixed to the front cylinder portion 1a of the shaft cylinder. The eraser 17 is fixed to the rear end hole of the inner cap 12b.

【0018】[0018]

【作用】本発明の構成は以上のごとくであり、チップ6
内にスプリング20が配設されて、先端ボール7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
が防止されて筆記掠れが起きない。又、先端ボール7と
ボール弁5の共同作用で上向き筆記や衝撃が加わっても
空気の巻き込みが緩和されるので筆記掠れが一層防止さ
れる。尚、インキの直流及び逆流は、スプリングによる
先端ボールへの押圧のみでも果たされるが、ボール弁と
併用することでチップ抱持部の加工バラツキによる先端
ボール7との密接不完全状態や、チップ抱持部と先端ボ
ール7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。
The structure of the present invention is as described above.
A spring 20 is disposed inside the tip ball 7, and the tip ball 7 is always in close contact with the inner edge of the tip holding portion, so that the tip portion is prevented from drying and writing is not caused. Further, even when upward writing or impact is applied by the cooperative action of the tip ball 7 and the ball valve 5, the air entrapment is reduced, so that writing blur is further prevented. The direct current and the reverse flow of the ink can be achieved only by pressing the tip ball by the spring. However, when used together with the ball valve, the tip holding portion is not in close contact with the tip ball 7 due to the processing variation of the tip holding portion, Supplementing the incomplete close state when solid matter adheres to the gap between the holding portion and the tip ball 7, supporting a large head of the ink to reliably prevent the backflow of the ink, and reducing the air entrainment (flagging) Prevention).

【0019】図2はチップ6を上向きにした状態を示し
ており、その時ボール弁5が弁室4のボール受け座3c
に密接して第1の導孔3dを密閉するので、上向き筆記
で先端ボール7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6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
にボール弁を有しない構造では、上向き筆記でインキの
ヘッド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徐々に累
積される)
FIG. 2 shows a state in which the chip 6 is directed upward, at which time the ball valve 5 is connected to the ball receiving seat 3c of the valve chamber 4.
The first guide hole 3d is tightly closed so that the ink does not flow backward even if the ink on the back surface of the tip ball 7 is exhausted by upward writing. Therefore, when the tip 6 is turned downward, the ink can immediately flow out, and writing is prevented from being rubbed. (By the way, in the structure without the ball valve, the ink head acts in the backward flow direction in upward writing, so that air is entrapped in the chip, and in downward writing, the ink does not immediately follow, causing rubbing.
In addition, air entrainment is gradually accumulated by repeated upward writing.)

【0020】チップ6を下向きにした筆記前の状態で
は、ボール弁5が弁室内のリブ2dの前端に当接状態と
なり、第1の導孔3dが開放される。インキ収容部から
第1の導孔3dを経て弁室4に入ったインキ9はリブと
リブとの間に形成された溝を通じてチップ内孔6bに流
入し、先端ボール7の背面まで導通され、筆記により先
端ボール7の回転でインキが流出されて筆記が可能とな
る。又、筆記に際して描線巾を変えたい場合には軸筒1
の握り位置を変えて所要のチップを選択する。尚、容易
に選択出来るように継ぎ手又は軸筒1の先方の外周部に
選択位置を表示するマーク等が設けられる。
Before writing with the tip 6 facing down, the ball valve 5 comes into contact with the front end of the rib 2d in the valve chamber, and the first guide hole 3d is opened. The ink 9 that has entered the valve chamber 4 from the ink storage portion via the first guide hole 3d flows into the chip inner hole 6b through a groove formed between the ribs, and is conducted to the back surface of the tip ball 7, The ink is discharged by the rotation of the tip ball 7 by writing, and writing becomes possible. Also, if you want to change the drawing width when writing,
Select the required chip by changing the grip position. It should be noted that a mark or the like indicating the selected position is provided on the outer periphery of the joint or the barrel 1 so as to be easily selected.

【0021】軸筒が内孔の前方に向かって二重筒状の内
筒部を有することで、ボールペンとシャープペンシルが
二重に収容できるので使い勝手の良い、携帯性に適した
軸長で、且つ市販の入手し易いシャープ芯が使用可能と
なる。
Since the shaft cylinder has a double cylindrical inner cylinder portion toward the front of the inner hole, the ballpoint pen and the mechanical pencil can be accommodated in a double manner, so that the shaft length is easy to use and suitable for portability. In addition, a commercially available sharp core can be used.

【0022】[0022]

【発明の効果】本発明の構成及び作用は以上の通りであ
り、ボテが少なく描線の濃い中粘度ボールペン、油性低
粘度ボールペンの適用を可能とする。又、インキの逆流
や下向きに置かれた時に直流が防止され、軸筒内や手や
衣服等を汚す事故が防止される。又、上向き筆記や衝撃
後にインキが即追随して筆記掠れが防止される。又、太
字用、細字用のチップを容易すれば、筆記中に表記や注
記など筆記描線巾を変えて大きい文字を書きたい場合
に、握り位置を変えて容易に筆記することが可能とな
る。又、両頭複式の筆記具と成した場合には、市販の入
手し易いシャープ芯が使用可能となり、使い勝手の良
い、携帯性に適した軸長となる。
The constitution and operation of the present invention are as described above, and it is possible to apply a medium-viscosity ball-point pen and an oil-based low-viscosity ball-point pen with a small number of dents and a large drawing line. In addition, direct current is prevented when the ink flows backward or is placed downward, thereby preventing accidents that stain the inside of the barrel, hands, clothes, and the like. In addition, the ink immediately follows after upward writing or impact, thereby preventing writing blur. Further, if a chip for bold or thin characters is made easier, it is possible to easily write by changing the grip position when writing a large character by changing the writing line width such as notation or note during writing. In the case of a double-ended double-ended writing instrument, a commercially available sharp core can be used, and the shaft length is easy to use and suitable for portability.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例を示す縦断面図で、一部非断面
となっている。
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and is partially non-sectional.

【図2】ボールペン先端部を拡大した要部断面図であ
る。
FIG. 2 is an enlarged sectional view of a main part of a tip portion of a ballpoint pen.

【符号の説明】[Explanation of symbols]

1 軸筒 1a 先筒部 1b 後筒部 1c 内筒部 1d 内孔 1e リブ 1f 通気溝 1g 内孔 1h 段部 2 前継ぎ手 2a 内孔 2b 軸部 2c 第2の導孔 2d リブ 3 後継ぎ手 3a 内孔 3b 軸部 3c ボール受け座 3d 第1の導孔 3e 段部 4 弁室 5 ボール弁 6 チップ 6` チップ 6a カシメ部 6b チップ内孔 7 先端ボール 8 ホルダー 8a 軸部 8b 段部 8c 仕切り部 9 インキ 10 フォロア 11 従動体 12 キャップ 13 栓体 14 後軸筒 14a 内段部 15 シャープペンシル 15a シャープペンシル機構部 15b 芯ケース 16 口金 16a 先端パイプ 17 消しゴム 20 スプリング 20a 棒軸部 20b 捲線部 1 Shaft tube 1a Front tube portion 1b Rear tube portion 1c Inner tube portion 1d Inner hole 1e Rib 1f Vent groove 1g Inner hole 1h Step 2 Front joint 2a Inner hole 2b Shaft portion 2c Second guide hole 2d rib 3 Back joint 3a Inner hole 3b Shaft portion 3c Ball receiving seat 3d First guide hole 3e Step portion 4 Valve chamber 5 Ball valve 6 Chip 66 Tip 6a Caulking portion 6b Chip inner hole 7 Tip ball 8 Holder 8a Shaft portion 8b Step portion 8c Partitioning portion Reference Signs List 9 ink 10 follower 11 follower 12 cap 13 stopper 14 rear barrel 14a inner step 15 mechanical pencil 15a mechanical pencil mechanism 15b core case 16 base 16a tip pipe 17 eraser 20 spring 20a rod shaft 20b winding part

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 軸筒の先方に複数のボールペンのチップ
がホルダーを介して固着され、後方のインキ室に基本的
には低粘度であるが、筆記時の先端ボールの回転で粘度
がより低下して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が充填され、インキの後
端に筆記に伴うインキの消耗に追随して移動するフォロ
アが設けられて成る筆記具に於いて、前記チップのそれ
ぞれの内孔にスプリングが内装されて、そのスプリング
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
プ先端のボール抱持部の内面に密接され、更に、それぞ
れのチップがホルダーの取付け孔に密嵌状に固着される
と共に軸筒先方の継ぎ手の先端にホルダーが固着され
て、継ぎ手の軸心には、チップ後端とインキ室を連通す
る弁室と導孔が設けられその弁室内にボール弁が遊嵌さ
れて、チップ上向きでボール弁が導孔を密閉するように
設けられて成る筆記具。
1. A tip of a plurality of ball-point pens is fixed to the front of a barrel via a holder, and basically has a low viscosity in a rear ink chamber, but the viscosity further decreases by rotation of a tip ball during writing. A writing implement which is filled with a water-based ink having a so-called shear-thinning viscosity or a low-viscosity oil-based ink, and a follower is provided at the rear end of the ink to move following the consumption of the ink accompanying the writing. A spring is provided in each of the inner holes of the chip, and the tip of the spring presses the back surface of the tip ball so that the tip ball is in close contact with the inner surface of the ball holding portion at the tip of the tip. Is firmly fixed to the holder mounting hole, and the holder is fixed to the tip of the joint at the end of the shaft cylinder.The valve shaft and the guide hole communicating the tip rear end and the ink chamber are provided at the joint axis. Provided A writing valve, wherein a ball valve is loosely fitted in the valve chamber, and the ball valve is provided so as to seal the guide hole with the tip facing upward.
【請求項2】 軸筒の後端からインキ室の前方に向かっ
て前端を閉塞した二重筒状の内筒部が設けられ、内筒部
の内孔にシャープペンシルの芯ケースが収容されると共
に、前記軸筒が後軸筒の後方に軸推移可能に装着され
て、軸筒の軸推移に伴い後軸筒の前端に配設されたシャ
ープペンシル機構部を連動させて芯を繰り出し可能と成
したことを特徴とする請求項1に記載の筆記具。
2. A double cylindrical inner cylinder having a front end closed from the rear end of the shaft cylinder toward the front of the ink chamber is provided, and a mechanical pencil lead case is accommodated in an inner hole of the inner cylinder. Along with the shaft barrel, the shaft barrel is mounted so as to be able to move behind the rear barrel, and the lead can be extended by interlocking a mechanical pencil mechanism disposed at the front end of the rear barrel along with the shaft movement of the barrel. The writing implement according to claim 1, wherein the writing implement is formed.
JP35582796A 1996-12-25 1996-12-25 Writing implement Expired - Fee Related JP3561384B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35582796A JP3561384B2 (en) 1996-12-25 1996-12-25 Writing implement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35582796A JP3561384B2 (en) 1996-12-25 1996-12-25 Writing implement

Publications (2)

Publication Number Publication Date
JPH10181275A true JPH10181275A (en) 1998-07-07
JP3561384B2 JP3561384B2 (en) 2004-09-02

Family

ID=18445953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35582796A Expired - Fee Related JP3561384B2 (en) 1996-12-25 1996-12-25 Writing implement

Country Status (1)

Country Link
JP (1) JP3561384B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008012678A (en) * 2006-06-30 2008-01-24 Pentel Corp Double headed writing utensil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008012678A (en) * 2006-06-30 2008-01-24 Pentel Corp Double headed writing utensil

Also Published As

Publication number Publication date
JP3561384B2 (en) 2004-09-02

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