JP3197422B2 - Ballpoint pen - Google Patents

Ballpoint pen

Info

Publication number
JP3197422B2
JP3197422B2 JP05260194A JP5260194A JP3197422B2 JP 3197422 B2 JP3197422 B2 JP 3197422B2 JP 05260194 A JP05260194 A JP 05260194A JP 5260194 A JP5260194 A JP 5260194A JP 3197422 B2 JP3197422 B2 JP 3197422B2
Authority
JP
Japan
Prior art keywords
tip
ball
ink
chip
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 - Fee Related
Application number
JP05260194A
Other languages
Japanese (ja)
Other versions
JPH07237386A (en
Inventor
小林  清一
和彦 古川
徹 北尾
Original Assignee
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 三菱鉛筆株式会社 filed Critical 三菱鉛筆株式会社
Priority to JP05260194A priority Critical patent/JP3197422B2/en
Priority claimed from TW083111406A external-priority patent/TW289744B/zh
Priority claimed from US08/501,077 external-priority patent/US5711626A/en
Publication of JPH07237386A publication Critical patent/JPH07237386A/en
Application granted granted Critical
Publication of JP3197422B2 publication Critical patent/JP3197422B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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、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クが流
出される、所謂剪断減粘性を有したインクを使用したボ
ールペンの改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an ink having a so-called shear thinning viscosity, which has a high viscosity statically and whose viscosity is reduced by rotation of a ball at the time of writing to cause ink to flow out. Regarding improvement of ballpoint pens.

【0002】[0002]

【従来の技術】同出願人は実公平4ー52067号でボ
ールを遊嵌した弁室を設けたボールペンのインクの逆流
防止機構を開示している。此のものは、合成樹脂製の口
プラでボールを遊嵌する弁室内にボールを抜出不能とす
る突条を所要数設けて、筆記時には突条と突条との間に
形成される隙間を連通してチップにインクが流動される
ように成されている。又、筆記時の先端ボールの回転で
粘性が低下してインクが流出される剪断減粘性を有した
インクを使用したボールペンが知られている。一般に剪
断減粘性を有したインクを使用したボールペンは、イン
クの流出量が多く(筆記濃度を上げるため)インク収容
管の径を太くしてインクの搭載量を多くしている。又、
インクの粘度は油性ボールペンのインクに比べて小さい
のでインク収容管に対する流動抵抗は小さい。従って、
インクの自重や衝撃によりインク漏れ(インク収容管の
後端にインクが逆流する)が生じやすい。その為に、通
常はインクの後端に筆記時のインクの消耗に追随して移
動するが、インクの自重や衝撃に対してインクの逆流を
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
チップのボール直下のインクが無くなると、インクのヘ
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、インク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
プかしめ部の隙間が生じるとインクが滲みでる(直流)
問題が存在する。
2. Description of the Related Art The applicant of the present invention discloses, in Japanese Utility Model Publication No. 4-52067, a mechanism for preventing backflow of ink of a ballpoint pen provided with a valve chamber into which a ball is loosely fitted. In this device, a required number of protrusions are provided in a valve chamber in which a ball is loosely fitted with a synthetic resin mouth plug to prevent the ball from being pulled out, and a gap formed between the protrusions during writing. And the ink flows to the chip. Further, a ballpoint pen using an ink having a shear thinning viscosity, in which the viscosity is reduced by the rotation of the tip ball during writing and the ink flows out, is known. In general, a ballpoint pen using ink having shear thinning viscosity has a large amount of ink flowing out (to increase the writing density), and has a large diameter of the ink storage tube to increase the amount of ink loaded. or,
Since the viscosity of the ink is smaller than that of the oil-based ball-point pen ink, the flow resistance to the ink storage tube is small. Therefore,
Ink leakage (ink flows backward at the rear end of the ink storage tube) easily occurs due to the ink's own weight or impact. For this purpose, a grease-like follower is provided at the rear end of the ink, which normally moves following the consumption of ink during writing, but suppresses the backflow of the ink against its own weight or impact. However, even when the follower is provided, if the ink immediately below the ball of the chip runs out when writing upward, there is a risk that a remarkable backflow occurs because the ink head is added directly and the hands and clothes are stained. In addition, since the viscosity of the ink is low and the amount of outflow is large, when the tip side faces downward and a gap is formed between the tip ball and the tip caulking portion, the ink bleeds (DC).
The problem exists.

【0003】[0003]

【発明が解決しようとする課題】本発明の目的は、筆記
時のボールの回転で粘性が低下してインクが流出される
剪断減粘性を有したインクを使用したボールペンの改良
であって、ボールペンの上向き筆記や衝撃によって生じ
るインク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。
SUMMARY OF THE INVENTION An object of the present invention is to improve a ball-point pen using ink having a shear-thinning property in which the viscosity is reduced by the rotation of the ball during writing and the ink flows out. In this way, it is possible to prevent reverse flow of ink caused by upward writing or impact and direct current when the tip side is placed downward, thereby preventing contamination of the inside of the barrel of the ballpoint pen, hands, and clothing.

【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
案出された本発明のボールペンは、継ぎ手の先端にボー
ルペンのチップを、後端にインク収容管を固着して成る
ボールペンに於いて、継ぎ手の軸心にチップの後端に連
通して後方に弁室が、弁室の後部にテーパー状又は球面
状のボール受け座が設けられ、ボール受け座に密接可能
とするボール弁が弁室内に遊嵌されて、更にボール弁の
前方とチップ後端との間にコマが固定され、コマの後端
にはボール弁の当接状態でインクが流入するインク誘導
溝が設けられ、コマの前端に後端部を当接した状態でチ
ップ内孔にスプリングが附勢されて、スプリングの先方
でチップ先端部に回転自在に抱持された先端ボールの後
端を押圧して、先端ボールがチップのボール抱持部の内
縁に密接され、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コマの後端にボール
弁が当接して導孔、インク誘導溝を通じてチップ内にイ
ンクが流入可能となる。
A ballpoint pen according to the present invention devised to achieve the above object is a ballpoint pen having a tip of a ballpoint pen fixed to a joint end and an ink storage tube fixed to a rear end. A valve chamber is provided at the rear in communication with the rear end of the chip at the shaft center of the joint, and a tapered or spherical ball receiving seat is provided at the rear of the valve chamber. The top is loosely fitted in the room, and the top is further fixed between the front of the ball valve and the rear end of the chip. A spring is urged into the chip inner hole with the rear end portion abutting the front end of the tip ball, and the rear end of the tip ball rotatably held at the tip end portion of the tip is pressed by the tip of the spring, and the tip ball is pressed. Is in close contact with the inner edge of the ball When the tip side is upward, the ball valve is in close contact with the ball receiving seat and the guide hole is sealed, and when the chip side is downward, the sealing state is released, and the ball valve contacts the rear end of the frame to guide the hole and the ink guide groove. The ink can flow into the chip through the.

【0005】[0005]

【実施例】図1及び図2は本発明の第1の実施例を示し
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。係止筒部7には前端よりチップ嵌着孔
10が形成されて、チップ嵌着孔10にはチップ5が後
端側から圧入されている。尚、チップ5の抜出を防止す
る為に、必要に応じてチップの軸部11に凸状の係止部
11aを形成して、チップ嵌着孔10後方のやや小孔と
したチップ嵌着孔10`に係止部11aを食いつき状に
係止させる。
1 and 2 show a first embodiment of the present invention. First, as shown in the figure, a locking cylinder 7 is provided in the first half of the joint 3 and a fitting cylinder 12 is provided in the second half of the joint 3.
Is provided with a rib 8 inclined forward in the axial direction at a required position on the circumference. A tip fitting hole 10 is formed in the locking cylinder part 7 from the front end, and the chip 5 is press-fitted into the tip fitting hole 10 from the rear end side. In order to prevent the chip 5 from being pulled out, a convex engaging portion 11a is formed on the shaft portion 11 of the chip as necessary, so that the chip fitting hole 10 is formed as a slightly small hole behind the chip fitting hole 10. The locking portion 11a is bitely locked in the hole 10 #.

【0006】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、前記チップ嵌着孔10、1
0`に連通して後方に弁室13が設けられている。又、
弁室13の後端にはテーパー状又は球面状のボール受け
座14が設けられている。
[0006] The joint 3 is made of an elastically deformable synthetic resin and is integrally formed.
A valve chamber 13 is provided at the rear in communication with 0 °. or,
A tapered or spherical ball receiving seat 14 is provided at the rear end of the valve chamber 13.

【0007】又、弁室13の後方にはボール受け座14
と連通する導孔20が形成されて、弁室13内にはボー
ル弁15が遊嵌されている。又、ボール弁15とチップ
の軸部11の後端との間にコマ16が固定される。尚、
ボール弁15が当接するコマ16の後端部位には所要箇
所でインク誘導溝16aが形成され、当該インク誘導溝
16aはコマ16の前方に貫通する孔16bに連通して
いる。
A ball receiving seat 14 is provided behind the valve chamber 13.
The ball valve 15 is loosely fitted in the valve chamber 13. A top 16 is fixed between the ball valve 15 and the rear end of the shaft 11 of the chip. still,
An ink guide groove 16a is formed at a required portion at a rear end portion of the top 16 where the ball valve 15 contacts, and the ink guide groove 16a communicates with a hole 16b penetrating forward of the top 16.

【0008】一方、チップ5はインク流入可能なチャネ
ル5bを有した座に先端ボール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かしめられ
ている。又、前記コマ16の前端に後端部を当接した状
態でチップ5の内孔にスプリング17が附勢される。ス
プリング17の先方には直立状の棒軸部18が形成され
て、該棒軸部18の先端が先端ボール5aの後端に押圧
状に当接する。先端ボール5aはその押圧でチップ5の
ボール抱持部(かしめ等で形成)の内縁に密接状態と成
される。
On the other hand, the tip 5 is swaged so that the tip ball 5a is rotatably held with the tip ball 5a substantially in contact with a seat having a channel 5b into which ink can flow. Further, a spring 17 is urged into the inner hole of the chip 5 in a state where the rear end portion is in contact with the front end of the top 16. An upright bar shaft 18 is formed at the tip of the spring 17, and the tip of the bar 18 contacts the rear end of the tip ball 5 a in a pressing manner. The tip ball 5a is brought into close contact with the inner edge of the ball holding portion (formed by caulking or the like) of the chip 5 by the pressing.

【0009】以上により、チップ側が下向きの時に前記
ボール弁15がコマ16の後端に当接状態となり、イン
クが導孔20、インク誘導溝16a、孔16b、チップ
5の内孔を通じて先端ボール5aの後端まで流入可能と
成される。
As described above, when the tip side is downward, the ball valve 15 comes into contact with the rear end of the top 16, and ink flows through the guide hole 20, the ink guide groove 16 a, the hole 16 b, and the inner hole of the tip 5, and the tip ball 5 a To the rear end.

【0010】又、継ぎ手3の前記係止筒部7の後端には
鍔部19が設けられ、鍔部19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
ク収容管4がその先端を鍔部19の後端に当接して圧入
固着され、インク収容管4の内径部が継ぎ手3の導孔2
0に連通している。インク収容管4内には静的には高い
粘性を有し、筆記時のボールの回転で粘性が低下してイ
ンクが流出可能となる剪断減粘性を有したインク21が
充填され、必要によりインク21の後端にインクの消耗
と共にインク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。(図示せず)
A flange 19 is provided at the rear end of the engaging cylinder 7 of the joint 3, and a fitting cylinder 12 is provided behind the flange 19.
Is extended. A cylindrical ink storage tube 4 is press-fitted and fixed to the outer periphery of the fitting cylindrical portion 12 with its front end abutting on the rear end of the flange portion 19, and the inner diameter portion of the ink storage tube 4 is formed in the guide hole 2 of the joint 3.
It communicates with 0. The ink accommodating tube 4 is filled with an ink 21 having a high viscosity statically, and having a shear-thinning viscosity that allows the ink to flow out by rotating the ball at the time of writing so that the ink can flow out. The rear end 21 is filled with a grease-like follower that can move in contact with and follow the ink surface as the ink is consumed. (Not shown)

【0011】以上のように、継ぎ手3にチップ5とイン
クを充填したインク収容管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19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
着させてボールペンが構成される。
As described above, the refill of a ballpoint pen formed by fixing the chip 5 and the ink containing tube 4 filled with ink to the joint 3 is inserted into the shaft cylinder 1, and the joint 3 is attached to the front surface of the shaft 6. The rear end edge of the flange 19 is abutted, and the base 2 having the step 9 provided on the inner surface thereof is brought into contact with the peripheral surface of the rib 8 of the joint 3 while the step 9 is brought into contact with the sleeve 3. A ballpoint pen is formed by screwing to the shaft portion 6 of the ballpoint pen.

【0012】ところで、図3は本発明の第2の実施例を
示している。基本的には上記第1の実施例と同じなので
相違点のみ説明する。チップ5内に嵌挿されるスプリン
グ32の前端は座を成し、その前部に棒軸部31を有し
た押し体30が配設されて、棒軸部31の先端が先端ボ
ール5aの後端に押圧状に当接する。
FIG. 3 shows a second embodiment of the present invention. Since it is basically the same as the first embodiment, only the differences will be described. The front end of the spring 32 inserted into the chip 5 forms a seat, and a push body 30 having a rod shaft portion 31 is disposed at the front portion thereof. The tip of the rod shaft portion 31 is the rear end of the tip ball 5a. Abuts on the pressing member.

【0013】[0013]

【作用】先ず、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、その時ボール弁15はコマ16の後
端に当接状態となり、導孔20が開放される。インク収
容管4から導孔20を経て弁室13に入ったインク21
はコマ16のインク誘導溝16a、孔16bを通過して
先端ボール5aの後端まで誘導される。尚、この状態で
は、棒軸部18の押圧で先端ボール5aがチップ抱持部
の内縁に密接されるのでインクの直流が防止される。
又、筆圧により先端ボール5aが微小に後退するので隙
間を生じてインクが流出可能となり、筆記により先端ボ
ール5aの回転で粘性が低下してインクが多量に流出さ
れ、ボテが無く、濃度の高い筆記が可能となる。
First, FIG. 1 shows a state before writing with the tip 5 facing down. At that time, the ball valve 15 comes into contact with the rear end of the top 16 and the guide hole 20 is opened. The ink 21 that has entered the valve chamber 13 from the ink storage tube 4 through the guide hole 20
Is guided to the rear end of the tip ball 5a through the ink guide groove 16a and the hole 16b of the top 16. In this state, the tip ball 5a is brought into close contact with the inner edge of the chip holding portion by the pressing of the rod shaft portion 18, so that direct current of ink is prevented.
In addition, the tip ball 5a is slightly retracted by the writing pressure, so that a gap is generated and ink can flow out. By writing, the rotation of the tip ball 5a lowers the viscosity and a large amount of ink flows out. High writing is possible.

【0014】又、図2はチップ5を上向きにした状態を
示しており、その時ボール弁15が弁室13のボール受
け座14に密接して導孔20を密閉するので、上向き筆
記で先端ボール5a直下のインクがなくなってもインク
が逆流しない。従って、チップ5を下向きにした時にイ
ンク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
ンク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ク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。)
FIG. 2 shows a state in which the tip 5 is directed upward. At this time, the ball valve 15 is in close contact with the ball receiving seat 14 of the valve chamber 13 to seal the guide hole 20. Even if the ink immediately below 5a runs out, the ink does not flow backward. Therefore, when the chip 5 is turned downward, the ink can immediately flow out, and the writing is prevented from being blurred.
(By the way, in the structure without the ball valve, the ink acts in the backward direction in the upward writing, so that air is trapped in the chip, and the ink does not immediately follow in the downward writing, resulting in rubbing.
Further, air entrapment is accumulated by repeating upward writing. )

【0015】又、実施例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19が軸部6の
前端に衝合した状態で口金2が螺着され、その時、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と口金2との間でガタ止めされる。
When the refill of the ballpoint pen according to the embodiment is mounted on the barrel 1, the base 2 is screwed in a state in which the flange 19 of the joint 3 abuts against the front end of the shaft 6. Since the ribs 8 of the stopper tube 7 bite against the step 9 of the base 2, play is stopped between the chip 5 and the base 2.

【0016】[0016]

【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、弁室内に遊嵌するボール弁により上向
き筆記や衝撃によってインクの逆流が防止可能となり、
又、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、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クが即追随するので掠れが防止され
る。又、実施例のボールペンは継ぎ手を介してチップと
口金がガタ止めされるので筆感が良いという効果を奏す
る。
The configuration and operation of the ballpoint pen according to the present invention are as described above, and the backflow of ink due to upward writing or impact can be prevented by the ball valve loosely fitted in the valve chamber.
In addition, since the tip ball is in close contact with the inner edge of the tip holding portion except when writing, direct current is prevented when the ball is placed downward, and accidents that stain the inside of the shaft cylinder, hands, clothes, and the like are prevented. In addition, the ink immediately follows after upward writing or impact, so that blurring is prevented. In addition, the ballpoint pen according to the embodiment has an effect that the writing feel is good because the tip and the base are loosened through the joint.

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

【図1】本発明の第1の実施例であるボールペンの要部
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 main part of a ballpoint pen according to a first embodiment of the present invention, showing a state where a chip is directed downward.

【図2】本発明の第1の実施例であるボールペンの要部
縦断面図で、チップを上向きにした状態を示している。
FIG. 2 is a longitudinal sectional view of a main part of the ballpoint pen according to the first embodiment of the present invention, showing a state where a chip is directed upward;

【図3】本発明の第2の実施例であるボールペンの要部
縦断面図で、チップを上向きにした状態を示している。
FIG. 3 is a longitudinal sectional view of a main part of a ballpoint pen according to a second embodiment of the present invention, showing a state where a chip is directed upward;

【符号の説明】[Explanation of symbols]

1 軸筒 2 口金 3 継ぎ手 4 インク収容管 5 チップ 5a 先端ボール 5b チャネル 6 軸部 7 係止筒部 8 リブ 9 段部 10 チップ嵌着孔 10` チップ嵌着孔 11 軸部 12 嵌合筒部 13 弁室 14 ボール受け座 15 ボール弁 16 コマ 16a インク誘導溝 16b 孔 17 スプリング 18 棒軸部 19 鍔部 20 導孔 21 インク 30 押し体 31 棒軸部 32 スプリング DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Base 3 Joint 4 Ink storage tube 5 Tip 5a Tip ball 5b Channel 6 Shaft 7 Locking cylinder 8 Rib 9 Step 10 Chip fitting hole 10 嵌 Chip fitting hole 11 Shaft 12 Shaping cylinder Reference Signs List 13 valve chamber 14 ball receiving seat 15 ball valve 16 frame 16a ink guide groove 16b hole 17 spring 18 bar shaft portion 19 flange portion 20 guide hole 21 ink 30 push body 31 bar shaft portion 32 spring

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭51−110637(JP,U) 実開 昭57−193578(JP,U) 実開 昭57−16384(JP,U) 実開 平7−17370(JP,U) 実公 平4−52067(JP,Y2) (58)調査した分野(Int.Cl.7,DB名) B43K 7/00 - 7/12 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 51-110637 (JP, U) Japanese Utility Model Sho 57-193578 (JP, U) Japanese Utility Model Sho 57-16384 (JP, U) Japanese Utility Model Hei 7- 17370 (JP, U) Jiko 4-52067 (JP, Y2) (58) Field surveyed (Int. Cl. 7 , DB name) B43K 7/ 00-7/12

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 継ぎ手の先端にボールペンのチップを、
後端にインク収容管を固着して成るボールペンに於い
て、継ぎ手の軸心にチップの後端に連通して後方に弁室
が、弁室の後部にテーパー状又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
上記弁室内に遊嵌されて、更にボール弁の前方とチップ
後端との間にコマが固定され、コマの後端にはボール弁
の当接状態でインクが流入するインク誘導溝が設けら
れ、コマの前端に後端部を当接した状態でチップ内孔に
スプリングが附勢されて、スプリングの先方でチップ先
端部に回転自在に抱持された先端ボールの後端を押圧し
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、チップ側が上向きの時に上記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
上記密閉状態が解除されると共に上記コマの後端にボー
ル弁が当接して導孔、インク誘導溝を通じてチップ内に
インクが流入するように構成されたことを特徴とするボ
ールペン。
1. A tip of a ballpoint pen at a tip of a joint,
In a ball-point pen having an ink storage tube fixed to the rear end, a valve chamber is provided at the rear in communication with the rear end of the chip at the axis of the joint, and a tapered or spherical ball receiving seat is provided at the rear of the valve chamber. A ball valve provided to allow close contact with the ball receiving seat is loosely fitted in the valve chamber, and a top is fixed between the front of the ball valve and the rear end of the chip. An ink guide groove through which ink flows in a contact state is provided, and a spring is urged into the chip inner hole with the rear end abutting on the front end of the top, and the tip of the spring is rotatable toward the tip end. By pressing the rear end of the held tip ball, the tip ball is in close contact with the inner edge of the ball holding portion of the chip, and when the tip side is upward, the ball valve is in close contact with the ball receiving seat and the guide hole is sealed. When the tip is facing down, the above sealed state is released. Ballpoint pen, characterized in that Rutotomoni bore hole the piece ball valve at the rear end of contact, the ink in the chip through the ink guide groove is configured to flow into.
【請求項2】 インク収容管には静的には高い粘性を有
し、筆記時の先端ボールの回転で粘性が低下してインク
が流出される、所謂剪断減粘性を有したインクが充填さ
れ、筆圧で先端ボールとチップのボール抱持部内縁との
密接状態が解除されて先端ボールの回転と共にインクが
流出可能となるように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. An ink storage tube is filled with an ink having a so-called shear thinning viscosity, which has a statically high viscosity and the viscosity is reduced by rotation of a tip ball during writing and the ink flows out. 2. The ball-point pen according to claim 1, wherein the close contact between the tip ball and the inner edge of the ball holding portion of the tip is released by writing pressure so that the ink can flow out with the rotation of the tip ball. .
【請求項3】 スプリングの先方に直立状の棒軸部を形
成して、棒軸部の先端が先端ボールの後端を押圧するよ
うに設けた上記請求項2記載のボールペン。
3. The ball-point pen according to claim 2, wherein an upright bar shaft is formed at the tip of the spring, and the tip of the bar shaft is provided so as to press the rear end of the tip ball.
【請求項4】 スプリングの前端に棒軸部を有した押し
体を軸推移可能に嵌挿して、棒軸部の先端が先端ボール
の後端を押圧するように設けた上記請求項2記載のボー
ルペン。
4. The spring according to claim 2, wherein a pusher having a rod shaft portion is fitted to the front end of the spring so as to be able to move axially so that the tip of the rod shaft portion presses the rear end of the tip ball. Ballpoint pen.
JP05260194A 1994-02-28 1994-02-28 Ballpoint pen Expired - Fee Related JP3197422B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05260194A JP3197422B2 (en) 1994-02-28 1994-02-28 Ballpoint pen

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
JP05260194A JP3197422B2 (en) 1994-02-28 1994-02-28 Ballpoint pen
TW083111406A TW289744B (en) 1993-12-06 1994-12-05
US08/501,077 US5711626A (en) 1993-12-06 1994-12-05 Ball-point pen with back flow stop
KR1019950703192A KR0151506B1 (en) 1993-12-06 1994-12-05 Ball-point pen
PCT/JP1994/002040 WO1995015859A1 (en) 1993-12-06 1994-12-05 Ball-point pen
CN94191080A CN1043625C (en) 1993-12-06 1994-12-05 Ball-point pen
CA002153589A CA2153589C (en) 1993-12-06 1994-12-05 A ball-point pen
EP95902303A EP0685348B1 (en) 1993-12-06 1994-12-05 Ball-point pen
KR1019950703192A KR960700158A (en) 1993-12-06 1994-12-05 Ball pen (BALL-POINT PEN)
DE69423880T DE69423880T2 (en) 1993-12-06 1994-12-05 PEN
US08/927,361 US5915871A (en) 1993-12-06 1997-09-09 Ball-point pen cap

Publications (2)

Publication Number Publication Date
JPH07237386A JPH07237386A (en) 1995-09-12
JP3197422B2 true JP3197422B2 (en) 2001-08-13

Family

ID=12919313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05260194A Expired - Fee Related JP3197422B2 (en) 1994-02-28 1994-02-28 Ballpoint pen

Country Status (1)

Country Link
JP (1) JP3197422B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005018952A1 (en) * 2003-08-25 2005-03-03 Mitsubishi Pencil Kabushikikaisha Writing implement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69627315T2 (en) * 1995-12-19 2003-10-16 Pilot Kk BALLPOINT PEN CARTRIDGE AND METHOD FOR THE PRODUCTION THEREOF
JP5694736B2 (en) * 2010-10-28 2015-04-01 パイロットインキ株式会社 Ballpoint pen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005018952A1 (en) * 2003-08-25 2005-03-03 Mitsubishi Pencil Kabushikikaisha Writing implement
JPWO2005018952A1 (en) * 2003-08-25 2006-10-19 三菱鉛筆株式会社 Writing instrument
US7140799B2 (en) 2003-08-25 2006-11-28 Mitsubishi Pencil Kabushikikaisha Writing implement
JP4535450B2 (en) * 2003-08-25 2010-09-01 三菱鉛筆株式会社 Writing instrument

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Publication number Publication date
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