JP3514517B2 - Ballpoint pen - Google Patents

Ballpoint pen

Info

Publication number
JP3514517B2
JP3514517B2 JP17492294A JP17492294A JP3514517B2 JP 3514517 B2 JP3514517 B2 JP 3514517B2 JP 17492294 A JP17492294 A JP 17492294A JP 17492294 A JP17492294 A JP 17492294A JP 3514517 B2 JP3514517 B2 JP 3514517B2
Authority
JP
Japan
Prior art keywords
ball
ink
tip
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
JP17492294A
Other languages
Japanese (ja)
Other versions
JPH0820187A (en
Inventor
小林  清一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Pencil Co Ltd
Original Assignee
Mitsubishi Pencil Co Ltd
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 filed Critical Mitsubishi Pencil Co Ltd
Priority to JP17492294A priority Critical patent/JP3514517B2/en
Publication of JPH0820187A publication Critical patent/JPH0820187A/en
Application granted granted Critical
Publication of JP3514517B2 publication Critical patent/JP3514517B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、粘性の低いインク又は
剪断減粘性を有したインクを使用したボールペンであっ
て、インクの直流、逆流を防止可能としたボールペンに
関する。 【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
先軸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。 【0003】 【発明が解決しようとする課題】本発明の目的は、粘性
の低いインク又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。 【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有して、インク収容管に
は粘性の低いインク又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
れる剪断減粘性を有したインクが充填され、インクの後
端に追随するフォロアが設けられて、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
て成るインクの逆流防止機構を備えたボールペンに於い
て、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
の内縁に密接されると共に、チップの軸部後端の軸側面
に所要箇所で切欠が設けられると共に後端がかしめられ
て、スプリングの後端がチップ後端のカシメ部で抜出不
能に成され、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チップの後端
にボール弁が当接して、導孔、上記チップ後端の切欠を
通じてチップ内孔にインクが流入可能となる。 【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。 【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。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。 【0007】一方、チップ5はインク流入可能なチャン
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、チップ5の内孔にスプリング16が附勢
される。スプリング16の先方には直立状の棒軸部17
が形成されて、該棒軸部17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。 【0008】又、チップの軸部11後端の軸側面には所
要箇所で切欠19が設けられると共に、後端がかしめら
れて、カシメ部18がスプリング16の後端に当接して
スプリング16を抜出不能と成している。以上により、
チップ側が下向きの時に前記ボール弁15がカシメ部1
8の後端に当接状態となり、インクが導孔20、上記切
欠19、チップ5の内孔を通じて先端ボール5aの後端
まで流入可能となる。 【0009】又、継ぎ手3の前記係止筒部7の後端には
鍔部21が設けられ、鍔部21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21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内には粘性の低いイ
ンク又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22が充填され、必要によりインク22
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。又、
更に必要に応じてフォロア内に樹脂製のフォロア棒が装
填される。(図示せず) 【0010】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21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。 【0011】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。 【0012】 【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はカシメ部18
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
22は切欠19からチップの内孔に流入して先端ボール
5aの後端まで誘導される。尚、この状態では、棒軸部
17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
ンクが流出し筆記可能となる。 【0013】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、上向き筆記で先
端ボールの密接状態が解除されるため大きなインクのヘ
ッドが掛かり、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やすい。従って、下向き筆記で即イ
ンクが追随せず掠れが生じやすい。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。又、ボール弁の
存在は、加工ばらつきによる先端ボールの密接不完全状
態、固形物の介在に伴う密接不完全状態に対してインク
逆流の安全機構として重要である。 【0014】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21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。 【0015】 【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筆記掠れが防止されると共に下
向きに置かれた時に直流が防止される。又、先端ボール
の密接状態が不完全であっても弁室内に遊嵌するボール
弁により上向き筆記や上向き落下等の衝撃によってイン
クの逆流が確実に防止可能となり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
クが即追随可能となるのでその直後の掠れも防止され
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。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ballpoint pen using low-viscosity ink or ink having shear-thinning viscosity, which can prevent direct current and backflow of ink. About the ballpoint pen. [0002] The applicant of the present invention discloses, in Japanese Utility Model Publication No. 4-52067, a mechanism for preventing ink from flowing back in a ball-point pen provided with a valve chamber into which a ball is loosely fitted. In this case, a required number of ridges are provided in a valve chamber in which a ball is loosely fitted with a synthetic resin tip shaft so that the ball cannot be pulled out, and a gap formed between the ridges during writing. And the ink is caused to flow to the chip. Further, a ballpoint pen using an ink having a shear thinning viscosity, in which the viscosity is reduced by rotation of the tip ball during writing and the ink is discharged, is known. In general, a ballpoint pen using ink having shear thinning has a large amount of ink flowing out (in order to increase the writing density), and has a large diameter of the ink storage tube to increase the mounting amount of ink. or,
Since the viscosity of the ink is smaller than that of the oil-based ballpoint 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 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 ink during writing, but suppresses the backflow of the ink against its own weight or impact. However, even if the follower is provided, when the ink is written immediately below the ball of the tip when writing upward, there is a danger that the ink or the head will be added directly, causing a remarkable backflow and soiling the hands and clothes. In addition, since the viscosity of the ink is low and the amount of outflow is large, if the tip side is directed downward and a gap is formed between the tip ball and the tip caulking portion, the ink bleeds (DC).
The problem exists. SUMMARY OF THE INVENTION An object of the present invention is to use ink having low viscosity or ink having a shear-thinning viscosity in which the viscosity is reduced by rotation of a ball during writing and the ink flows out. Improvement of ballpoint pens, which can prevent backflow of ink caused by upward writing or impact of ballpoint pens and direct current when the tip side is placed downward, and can prevent contamination of the ball-point pen barrel, hands, and clothes. . [0004] Ballpoint the present invention in order to achieve the above object In order to achieve the above, the ballpoint pen tip to the tip of the joint, has an ink storage tube to the rear end, the ink containing tube
Has low viscosity ink or static high viscosity
When the tip ball rotates, the viscosity drops and ink spills.
Is filled with ink having a shear thinning
A follower is provided to follow the end, a valve chamber is provided at the rear in communication with the rear end of the chip at the joint axis, and a tapered or spherical ball receiving seat is provided at the rear of the valve chamber, and a ball receiving seat is provided. In a ball-point pen with a backflow prevention mechanism for ink, a ball valve that can be brought into close contact with the valve chamber is loosely fitted into the valve chamber, a spring is urged to the tip bore, and the tip of the spring is rotated toward the tip of the tip. The tip end ball is pressed freely against the rear end of the tip ball so that the tip ball comes into close contact with the inner edge of the ball holding portion of the chip, and the shaft side surface at the rear end of the shaft portion of the chip
Notches are provided at required places and the rear end is caulked
The rear end of the spring cannot be pulled out at the crimped portion at the tip end of the tip, 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, and when the tip side is downward, the seal is closed. When the state is released, the ball valve comes into contact with the rear end of the chip, and ink can flow into the chip inner hole through the guide hole and the notch at the rear end of the chip. FIG. 1 and FIG. 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, and the locking cylinder 7 on the front side is provided.
Is provided with a rib 8 inclined forward in the axial direction at a required position on the circumference. A chip fitting hole 10 is formed from the front end of the locking cylinder 7, and the chip 5 is pressed into the chip fitting hole 10 from the rear end side. 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 the tip fitting hole 10. Also, the valve chamber 13
The rear end is provided with a tapered or spherical ball receiving seat 14. A guide hole 20 communicating with the ball receiving seat 14 is formed behind the valve chamber 13, and a ball valve 15 is loosely fitted in the valve chamber 13. 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. A spring 16 is urged into the inner hole of the chip 5. An upright bar shaft 17 is located at the end of the spring 16.
Is formed, and the tip of the rod shaft portion 17 is pressed against the rear end of the tip ball 5a. 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. A notch 19 is provided at a required position on the shaft side surface at the rear end of the shaft portion 11 of the chip, and the rear end is caulked so that the caulking portion 18 comes into contact with the rear end of the spring 16 and It is impossible to pull out. From the above,
When the tip side is downward, the ball valve 15 is
8 comes into contact with the rear end of the tip ball 5a through the guide hole 20, the notch 19, and the inner hole of the chip 5. A flange 21 is provided at the rear end of the locking cylinder 7 of the joint 3, and a fitting cylinder 12 is provided behind the flange 21.
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 21.
It communicates with 0. The ink container 4 is filled with ink 22 having a low viscosity or a static viscosity having a high viscosity, and having a viscosity decreasing by the rotation of the ball during writing, and having a shear-thinning viscosity which allows the ink to flow out. Ink 22 if necessary
The rear end is filled with a grease-like follower that can move following the ink surface as the ink is consumed. or,
Further, a follower rod made of resin is loaded in the follower as needed. (Not shown) As described above, the refill of a ballpoint pen constituted by fixing the tip 5 and the ink containing tube 4 filled with ink to the joint 3 is inserted into the shaft cylinder 1, and The rear end edge of the flange portion 21 of the joint 3 was brought into contact with the front surface, and the base 2 provided with the step 9 on the inner surface thereof was brought into contact with the peripheral surface of the rib 8 of the joint 3. In this state, the ball-point pen is screwed onto the shaft portion 6 of the shaft cylinder 1. 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, and the front end of the rod shaft portion 31 is the rear end of the tip ball 5a. Abuts on the pressing member. First, FIG. 1 shows a state before writing with the tip 5 turned down, and at this time, the ball valve 15 is
Is brought into contact with the rear end, and the conducting hole 20 is opened. The ink 22 that has entered the valve chamber 13 from the ink storage tube 4 through the guide hole 20 flows into the inner hole of the chip from the notch 19 and is guided to the rear end of the tip ball 5a. 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 17, so that the direct current of ink is prevented. Further, since the tip ball 5a is slightly retracted by the writing pressure, a gap is generated and the ink flows out to enable writing. 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 flared.
(By the way, in the structure without the ball valve, the close contact state of the tip ball is released by upward writing, a large ink head is applied, and the ink acts in the backward flow direction, so that air is easily entrapped in the chip. The ink does not immediately follow the ink, and the ink is not easily followed, so that the ink is apt to be rubbed, and air entrapment is accumulated by repeating the upward writing. The refill of the ballpoint pen according to the embodiment is mounted on the barrel 1 when the flange 21 of the joint 3 is attached to the shaft. The base 2 is screwed in contact with the front end of the base 6, and at this time, the rib 8 of the locking cylinder 7 bites against the step 9 of the base 2, so that the gap between the chip 5 and the base 2 is maintained. Mo [0015] The configuration and operation of the ballpoint pen of the present invention are as described above, and since the tip ball is in close contact with the inner edge of the chip holding portion except when writing, the writing blur is prevented. In addition, direct current is prevented when the ball is placed downward, and even if the tip ball is not in close contact, the backflow of ink due to impact such as upward writing or upward drop is caused by the ball valve that fits loosely into the valve chamber. It is possible to reliably prevent the occurrence of stains on the inside of the shaft cylinder, hands, clothes, etc. In addition, since ink can immediately follow after upward writing or impact, it is possible to prevent sharpness immediately after that. The ballpoint pen 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】 【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。 【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。 【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。 【符号の説明】 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 チャンネル 6 軸部 7 係止筒部 8 リブ 9 段部 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 スプリング 17 棒軸部 18 カシメ部 19 切欠 20 導孔 21 鍔部 22 インク 30 押し体 31 棒軸部 32 スプリング
BRIEF DESCRIPTION OF THE DRAWINGS 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 in which a chip is directed downward. 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; FIG. 3 is a vertical 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; DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Cap 3 Joint 4 Ink storage tube 5 Tip 5 a Tip ball 5 b Channel 6 Shaft 7 Locking cylinder 8 Rib 9 Step 10 Chip fitting hole 11 Shaft 12 Fitting cylinder 13 Valve chamber 14 Ball seat 15 Ball valve 16 Spring 17 Bar shaft portion 18 Caulking portion 19 Notch 20 Guide hole 21 Flange portion 22 Ink 30 Press body 31 Bar shaft portion 32 Spring

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B43K 1/08 B43K 7/00 - 7/12 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) B43K 1/08 B43K 7/ 00-7/12

Claims (1)

(57)【特許請求の範囲】 【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有して、インク収容管には粘性の
低いインク又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剪断
減粘性を有したインクが充填され、インクの後端に追随
するフォロアが設けられて、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成るイ
ンクの逆流防止機構を備えたボールペンに於いて、 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
縁に密接されると共に、チップの軸部後端の軸側面に所
要箇所で切欠が設けられると共に後端がかしめられて、
スプリングの後端がチップ後端のカシメ部で抜出不能に
成され、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チップの後端にボ
ール弁が当接して、導孔、上記チップ後端の切欠を通じ
てチップ内孔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。
(57) [Claims] [Claim 1] A ballpoint pen tip is attached to the tip of the joint,
The rear end has an ink storage tube, and the ink storage tube has a viscous
Low ink or high viscosity for static, tip for writing
Shears where the viscosity drops due to the rotation of the ball and ink flows out
Filled with ink with reduced viscosity and follows the trailing edge of ink
A follower is provided, and the shaft center of the joint communicates with the rear end of the chip, and a valve chamber is provided at the rear, and a tapered or spherical ball seat is provided at the rear of the valve chamber, and can be closely contacted with the ball seat. In a ball-point pen provided with a backflow prevention mechanism for ink in which a ball valve is loosely fitted in the valve chamber, a spring is biased in the chip inner hole, and the tip of the spring is rotatably held at the tip of the spring. By pressing the rear end of the held tip ball, the tip ball is brought into close contact with the inner edge of the ball holding portion of the chip, and is located on the shaft side surface at the rear end of the shaft portion of the chip.
Notches are provided at important points and the rear end is caulked,
The rear end of the spring cannot be pulled out at the caulked portion at the rear end of the tip.When the tip side is upward, the ball valve is in close contact with the ball receiving seat and the guide hole is sealed. A ballpoint pen, wherein the ball valve is configured to be released and a ball valve abut on a rear end of the chip so that ink flows into the inner hole of the chip through the guide hole and the cutout of the rear end of the chip.
JP17492294A 1994-07-05 1994-07-05 Ballpoint pen Expired - Fee Related JP3514517B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17492294A JP3514517B2 (en) 1994-07-05 1994-07-05 Ballpoint pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17492294A JP3514517B2 (en) 1994-07-05 1994-07-05 Ballpoint pen

Publications (2)

Publication Number Publication Date
JPH0820187A JPH0820187A (en) 1996-01-23
JP3514517B2 true JP3514517B2 (en) 2004-03-31

Family

ID=15987067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17492294A Expired - Fee Related JP3514517B2 (en) 1994-07-05 1994-07-05 Ballpoint pen

Country Status (1)

Country Link
JP (1) JP3514517B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5375045B2 (en) * 2008-11-21 2013-12-25 ぺんてる株式会社 Blasting and urging structure of writing instrument and method for manufacturing the same

Also Published As

Publication number Publication date
JPH0820187A (en) 1996-01-23

Similar Documents

Publication Publication Date Title
US5678942A (en) Ball-point pen
JP3514517B2 (en) Ballpoint pen
JP3197422B2 (en) Ballpoint pen
JP3197423B2 (en) Ballpoint pen
JP3333059B2 (en) Ballpoint pen
JP3553699B2 (en) Ballpoint pen refill
JP2865553B2 (en) Ballpoint pen refill
JP3154890B2 (en) Ballpoint pen refill
JP3251420B2 (en) Ballpoint pen
JP3307789B2 (en) Ballpoint pen
JP3317570B2 (en) Ballpoint pen refill
JP2865586B2 (en) Ballpoint pen
JP2865582B2 (en) Ballpoint pen
JP3561383B2 (en) Ballpoint pen
JP3514558B2 (en) Ballpoint pen
JP3736813B2 (en) Ballpoint pen with valve device
JP3444824B2 (en) Ballpoint pen
JP3336119B2 (en) Ballpoint pen
JPH0976689A (en) Ball-point pen
JP3724908B2 (en) Ballpoint pen
JPH07237388A (en) Pen filled with viscosity-reducing ink by shearing
JP3444825B2 (en) Ballpoint pen
JPH10217668A (en) Ballpoint pen
JPH10217667A (en) Ballpoint pen
JPH10181278A (en) Ball point pen

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040106

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040113

LAPS Cancellation because of no payment of annual fees