JPH08230378A - Ball-point pen - Google Patents

Ball-point pen

Info

Publication number
JPH08230378A
JPH08230378A JP7063491A JP6349195A JPH08230378A JP H08230378 A JPH08230378 A JP H08230378A JP 7063491 A JP7063491 A JP 7063491A JP 6349195 A JP6349195 A JP 6349195A JP H08230378 A JPH08230378 A JP H08230378A
Authority
JP
Japan
Prior art keywords
ball
tip
ink
valve
valve chamber
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
JP7063491A
Other languages
Japanese (ja)
Other versions
JP3333059B2 (en
Inventor
Seiichi Kobayashi
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 JP06349195A priority Critical patent/JP3333059B2/en
Priority claimed from US08/601,246 external-priority patent/US5678942A/en
Publication of JPH08230378A publication Critical patent/JPH08230378A/en
Application granted granted Critical
Publication of JP3333059B2 publication Critical patent/JP3333059B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To surely prevent counterflow of ink by integrally forming a holder for fitting the outer periphery of a tip on the tip end of a coupling, and allowing a ball valve seat to be in close contacts with the ball receiving seat so as to close the introduction hole as the tip side is directed upward in a ball-point pen having a tip in the tip end of a coupling. CONSTITUTION: An engagement cylinder 7 is provided in the fore half portion of the coupling 3 and a fitting cylinder portion 12 is in the hind half portion, and axially forward inclined ribs 8 are provided at a desired place of the outer periphery, further a holder fitting hole 3a is formed in its center in order to insert and secure a tip 5 in the tip fitting hole 10a of a holder portion 10 from its rear end side. Also, a fitting cylinder portion 12 has a ball receiving seat 14 in its shaft center and a introduction hole 16 provided on the rear end thereof, then a valve chamber 15 is formed between the ball receiving 14 and the ribs 11 for loosely retaining the ball valve 17. In this manner, as the tip side 5 is directed upward, the ball valve 17 comes in close contact with the the ball receiving seat 14 of the valve chamber 15 and closing the introduction hole 18, thereby preventing counterflow of ink and permitting upper direction writing.

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、低粘度のインク又は基
本的には低粘度であるが、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 has a low-viscosity ink, or basically a low-viscosity ink, but has a statically high viscosity, and the viscosity of the ink is lowered by the rotation of the ball during writing, resulting in the ink The present invention relates to improvement of a ball-point pen using an ink having a so-called shear thinning viscosity that is discharged.

【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。
2. Description of the Related Art The same applicant discloses in JP-B-4-52067 a mechanism for preventing backflow of ink in a ballpoint pen provided with a valve chamber in which a ball is loosely fitted. This is a synthetic resin mouth plastic with a required number of ridges that prevent balls from being pulled out in the valve chamber where the balls are loosely fitted, and when writing, the gap formed between the ridges. The ink is made to flow through the chip to communicate with the chip. There is also known a ball-point pen using an ink having a shear thinning property in which the viscosity is lowered by the rotation of the tip ball at the time of writing and the ink flows out. Generally, a ball-point pen using an ink having shear thinning viscosity has a large ink outflow amount (in order to increase the writing density) and has a large diameter of an ink containing tube to increase an ink loading amount. or,
Since the viscosity of the ink is smaller than that of the ink of the oil-based ballpoint pen, the flow resistance to the ink containing tube is small. Therefore,
Ink leakage (ink flows back to the rear end of the ink containing tube) easily occurs due to its own weight or impact. Therefore, a grease-like follower is provided at the trailing end of the ink, which normally moves following the consumption of the ink during writing, but which suppresses the backflow of the ink against its own weight and impact. However, even if the follower is provided, if ink immediately below the ball of the chip runs out when writing upward, there is a risk of conspicuous backflow due to the addition of the ink head, and the hands and clothes may be soiled.

【0003】[0003]

【発明が解決しようとする課題】本発明の課題は、低粘
度のインク又は基本的には低粘度であり筆記時のボール
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
逆流を防止可能とし、ボールペンの軸筒内や手、衣服の
汚損を防止可能とする。又、衝撃直後の筆記掠れを防止
可能とする。又、先端ボールの径をφ0.3、φ0.4
とした細書き用のボールペンとして上記の課題を満足さ
せることを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a low-viscosity ink or, basically, a shear thinning property in which the viscosity is lowered by the rotation of a ball during writing and the ink is flowed out. It is an improvement of the ball-point pen using the ink
It is possible to prevent backflow of ink caused by upward writing of a ballpoint pen and impact, and to prevent stains on the inside of the ballpoint pen barrel, hands, and clothes. Also, it is possible to prevent blurring of writing immediately after impact. Also, the tip ball diameter is φ0.3, φ0.4
It is an object of the present invention to satisfy the above problems as a ballpoint pen for fine writing.

【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、後方にインク収容管を有して成るボ
ールペンに於いて、継ぎ手の先端にパイプ状細径のチッ
プの長手外周部を嵌着するホルダーを圧着すると共に、
継ぎ手後方の軸心に弁室が設けられて、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てボール
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
れて成り、上記ホルダーの後端に所要数のリブが設けら
れて上記弁室の前端に位置され、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上
記リブの後端にボール弁が当接して導孔、弁室、リブと
リブの間に形成された溝等を通じてチップ内にインクが
流入可能となる。又、上記継ぎ手後方の軸心の内孔後方
段部に後端部を当接した状態で前方にスプリングが附勢
されて、スプリングの先端でチップ先端部に回転自在に
抱持された先端ボールの背面を押圧して先端ボールがチ
ップのボール抱持部の内縁に密接されてなり、筆圧で先
端ボールが僅かに後退して抱持部との間に隙間を生じて
インクを流出可能とする。又、上記ボール弁を遊嵌した
弁室と先端ボールの背面を押圧するスプリングの双方を
備えてインクの逆流と直流、筆記掠れ等を確実に防止可
能とする。
A ball-point pen of the present invention devised to achieve the above object is a ball-point pen having a ball-point pen tip at a tip of a joint and an ink containing tube at a rear side. While crimping the holder that fits the long outer peripheral part of the pipe-shaped small diameter tip to the tip of the joint,
A valve chamber is provided in the shaft center behind the joint, and a tapered or spherical ball receiving seat is provided in the rear portion of the valve chamber, and a ball valve that can be brought into close contact with the ball receiving seat is loosely fitted in the valve chamber. And the required number of ribs are provided at the rear end of the holder and located at the front end of the valve chamber, 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 side is facing downward, the sealed state is released and the ball valve comes into contact with the rear end of the rib to allow the ink to flow into the tip through the guide hole, the valve chamber, the groove formed between the rib and the like. Become. In addition, a spring is urged forward with the rear end portion in contact with the rear step portion of the inner hole of the shaft center behind the joint, and the tip ball rotatably held by the tip end portion of the spring at the tip end of the spring. The tip ball is pressed closely against the inner edge of the ball holding portion of the chip by pressing the back surface of the chip, and the tip ball slightly retracts due to the writing pressure to create a gap between the tip ball and the holding portion, allowing ink to flow out. To do. Further, both the valve chamber in which the ball valve is loosely fitted and the spring that presses the back surface of the tip ball are provided to reliably prevent backflow of ink, direct current, and blurring of writing.

【0005】[0005]

【実施例】図1乃至図4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。又、係止筒部7には前端より中心部に
ホルダー嵌着孔3aが形成されている。一方、ホルダー
10は前端より中心部にチップ嵌着孔10aを有し、後
端に所要数のリブ11が形成されている。又、ホルダー
10のチップ嵌着孔10aにチップ5が後端側から挿入
されて固着される。
1 to 4 show a first embodiment of the present invention. First, as shown in the figure, a locking cylinder portion 7 and a fitting cylinder portion 12 are provided in the front half of the joint 3 and the front locking cylinder portion 7 is provided.
A rib 8 inclined forward in the axial direction is provided at a required position on the circumference. Further, a holder fitting hole 3a is formed in the locking cylinder portion 7 in the center portion from the front end. On the other hand, the holder 10 has a chip fitting hole 10a at the center from the front end, and a required number of ribs 11 are formed at the rear end. Further, the tip 5 is inserted and fixed in the tip fitting hole 10a of the holder 10 from the rear end side.

【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、前記ホルダー嵌着孔3aに
連通して後方に弁室15が形成されている。又、弁室1
5の後端にはテーパー状又は球面状のボール受け座14
が形成されてボール受け座14の中心から後端に貫通し
た導孔16が設けられている。又、弁室15内にボール
弁17が遊嵌される。
The joint 3 is integrally formed of an elastically deformable synthetic resin, and has a valve chamber 15 formed in the rear thereof so as to communicate with the holder fitting hole 3a. Also, valve chamber 1
5 has a tapered or spherical ball receiving seat 14 at the rear end.
Is formed and a guide hole 16 penetrating from the center of the ball receiving seat 14 to the rear end is provided. Further, the ball valve 17 is loosely fitted in the valve chamber 15.

【0007】ところで、チップ5はステンレス等の細管
で、外周の3箇所で押圧カシメされてインク流入可能な
チャンネルを有した受け座5b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。
By the way, the tip 5 is a thin tube made of stainless steel or the like, and the tip ball 5a rotates while the tip ball 5a is substantially in contact with a receiving seat 5b having a channel into which ink can flow by being pressed and crimped at three locations on the outer periphery. It is crimped so that it can be held freely.

【0008】以上により、前記ホルダー10が前記継ぎ
手3のホルダー嵌着孔3aに嵌着される。この状態でチ
ップ側が下向きの時に前記ボール弁17がホルダー10
のリブ11の後端に当接状態となり、インクが導孔1
6、弁室15、リブとリブの間の溝等を通じてチップ5
の内孔に流入可能となる。
As described above, the holder 10 is fitted in the holder fitting hole 3a of the joint 3. In this state, when the tip side is facing downward, the ball valve 17 moves the holder 10
The rib 11 comes into contact with the rear end of the rib 11 and the ink is introduced
6, the valve chamber 15, the tip 5 through the groove between the ribs
Can flow into the inner hole of the.

【0009】又、継ぎ手3の前記係止筒部7の後端には
鍔部13が設けられ、鍔部13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13の後端に当接して圧入
固着される。
A flange 13 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 13.
Has been extended. The cylindrical ink containing tube 4 is press-fitted and fixed to the outer periphery of the fitting cylindrical portion 12 with its tip abutting against the rear end of the collar 13.

【0010】又、インク収容管4の内径部が継ぎ手3の
導孔16に連通している。インク収容管4内には低粘度
のインク又は基本的には低粘度であるが、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26が
充填され、インク26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28が充填される。又、フォロア28内に該フォロア
28と略同等の比重を有する樹脂製のフォロア棒29が
浸漬される。尚、フォロア棒29は必要により(インク
収容部断面径が大きく、インクのヘッドが大きくなる。
又、インクの粘性が低く、インクのヘッドが支えきれな
い等の場合)設けられる。又、フォロア棒は丸又は異形
断面を有した棒状、筒状、カップ状など必要に応じて形
成される。
The inner diameter of the ink containing tube 4 communicates with the guide hole 16 of the joint 3. Low viscosity ink or basically low viscosity in the ink containing tube 4, but statically high viscosity, the viscosity is reduced by the rotation of the ball during writing, and the ink can flow out. The ink 26 having the shear thinning property is filled, and the rear end of the ink 26 is filled with a grease-like follower 28 that is movable as it contacts the ink surface as the ink is consumed and follows the ink surface. Further, a resin follower rod 29 having a specific gravity substantially equal to that of the follower 28 is immersed in the follower 28. The follower rod 29 is necessary (the cross-sectional diameter of the ink containing portion is large, and the ink head becomes large).
Further, it is provided when the viscosity of the ink is low and the ink head cannot be supported. Further, the follower rod is formed as required, such as a rod shape having a round or irregular cross section, a tubular shape, or a cup shape.

【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13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、又、軸筒1の後端に尾栓27が止着されてボー
ルペンが構成される。
As described above, the refill of a ballpoint pen constituted by fixing the tip 5 and the ink containing tube 4 filled with the ink to the joint 3 is inserted into the barrel 1 and the joint 6 is attached to the front face of the shaft portion 6. The barrel 1 with the rear end edge of the collar portion 13 abutting against each other and the step portion 9 provided on the inner surface portion thereof abutting against the peripheral surface of the rib 8 of the joint 3 A ball-point pen is constructed by screwing it to the shaft portion 6 of and the tail plug 27 is fixed to the rear end of the shaft cylinder 1.

【0012】図5は本発明の第2の実施例を示してお
り、第1の実施例との相違点のみ説明する。スプリング
37は先方に直立状のストレート部39と後方に捲線部
38が形成されて成り、ストレート部39がチップ5の
内孔に挿入され、捲線部38がホルダー36の後方で継
ぎ手30軸心の内孔に位置され、捲線部38の後端が内
孔32後端の段部35に当接されて上記ストレート部3
9の先端が先端ボール5aの背面を押圧している。
FIG. 5 shows a second embodiment of the present invention, and only differences from the first embodiment will be described. The spring 37 is formed by forming an upright straight portion 39 on the front side and a winding portion 38 on the rear side. The straight portion 39 is inserted into the inner hole of the chip 5, and the winding portion 38 is located behind the holder 36 and has the axis of the joint 30. The straight part 3 is located in the inner hole, and the rear end of the winding part 38 is brought into contact with the step part 35 at the rear end of the inner hole 32.
The tip of 9 presses the back surface of the tip ball 5a.

【0013】図6及び図7は本発明の第3の実施例を示
しており、同様に前記実施例との相違点のみ説明する。
スプリング50は先方に直立状のストレート部52と後
方に捲線部51が形成されて成り、ストレート部52が
チップ5の内孔に挿入され、捲線部51がホルダー46
後端のリブ49の外周に位置される。
FIGS. 6 and 7 show a third embodiment of the present invention. Similarly, only the differences from the above embodiment will be described.
The spring 50 is formed by forming an upright straight portion 52 on the front side and a winding portion 51 on the rear side. The straight portion 52 is inserted into the inner hole of the chip 5, and the winding portion 51 is attached to the holder 46.
It is located on the outer circumference of the rib 49 at the rear end.

【0014】又、継ぎ手40は弾性変形可能な合成樹脂
により一体成形成されており、ホルダー嵌着孔41に連
通して後方に弁室42が形成されている。又、弁室42
の後方には段部44が、後端にはテーパー状又は球面状
のボール受け座43が形成されてボール受け座43の中
心から後端に貫通した導孔45が設けられている。以上
で、捲線部51の内側にボール弁53が挿入されて、ホ
ルダー46は上記継ぎ手40のホルダー嵌着孔41に固
着される。又その時、弁室42の前端に前記ホルダー4
6後端のリブ49が位置し、スプリング50は捲線部5
1bの後端が弁室後方の段部44に当接して前方に附勢
され、ストレート部52の先端で先端ボール5aの背面
を押圧する。尚、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。又、ボール弁53はリブ49の後端とボール
受け座43との間で自由動する。
Further, the joint 40 is integrally formed of an elastically deformable synthetic resin, and communicates with the holder fitting hole 41, and a valve chamber 42 is formed at the rear. Also, the valve chamber 42
A stepped portion 44 is provided at the rear of the ball receiving base 43, a tapered or spherical ball receiving seat 43 is formed at the rear end, and a guide hole 45 penetrating from the center of the ball receiving seat 43 to the rear end is provided. As described above, the ball valve 53 is inserted inside the winding portion 51, and the holder 46 is fixed to the holder fitting hole 41 of the joint 40. At that time, the holder 4 is attached to the front end of the valve chamber 42.
6 The rib 49 at the rear end is located, and the spring 50 is
The rear end of 1b comes into contact with the stepped portion 44 at the rear of the valve chamber and is biased forward, and the front end of the straight portion 52 presses the back surface of the front end ball 5a. In addition, the tip ball 5a presses the tip 5
Is closely contacted with the inner edge of the ball holding portion (formed by crimping or the like). Further, the ball valve 53 freely moves between the rear end of the rib 49 and the ball receiving seat 43.

【0015】以上により、チップ側が下向きの時に前記
ボール弁53が前記リブ49の後端に当接状態となり、
インクが導孔45、弁室42、リブとリブの間の溝等を
通じてチップ5の内孔に入り先端ボール5aの背面に至
る。
As described above, when the tip side is facing downward, the ball valve 53 comes into contact with the rear end of the rib 49,
Ink enters the inner hole of the chip 5 through the guide hole 45, the valve chamber 42, the groove between the ribs, and the like, and reaches the back surface of the tip ball 5a.

【0016】[0016]

【作用】先ず、第1の実施例で図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17
はリブ11の後端に当接状態となり、導孔16が開放さ
れる。インク収容管4から導孔16を経て弁室15に入
ったインク26はリブとリブとの間に形成された溝等を
通過して先端ボール5aの背面まで誘導される。
First, in the first embodiment, FIG. 1 shows a state before writing with the tip 5 facing downward. At that time, the ball valve 17
Comes into contact with the rear end of the rib 11 and the guide hole 16 is opened. The ink 26 that has entered the valve chamber 15 from the ink containing tube 4 through the guide hole 16 passes through a groove formed between the ribs and is guided to the back surface of the tip ball 5a.

【0017】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17が弁室15のボール受
け座14に密接して導孔16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、上向き筆記で即
インクが逆流しないとしても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)
Further, FIG. 2 shows a state in which the tip 5 is directed upward, and at that time, since the ball valve 17 is in close contact with the ball receiving seat 14 of the valve chamber 15 to seal the guide hole 16, the tip ball is directed upward. Even if the ink immediately below 5a is exhausted, the ink does not flow back. Therefore, the ink can immediately flow out when the tip 5 is turned downward, and blurring in writing can be prevented.
(By the way, in the structure without the ball valve, even if the ink does not flow backward immediately when writing upward, the ink acts in the backward direction, so that air is entrapped in the chip, and when writing downward, the ink does not follow immediately and blurring occurs.)

【0018】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13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は口金2との間でガタ止めされる。
When the ballpoint pen refill of the embodiment is mounted on the shaft cylinder 1, the mouthpiece 2 is screwed with the collar portion 13 of the joint 3 abutting against the front end of the shaft portion 6. At that time, The rib 8 of the stop cylinder portion 7 bites against the step portion 9 of the mouthpiece 2 in a biting manner, so that the tip 5 is prevented from rattling with the mouthpiece 2.

【0019】又、第2の実施例に於いて、図5はチップ
5を下向きにした筆記前の状態を示しており、この状態
ではスプリング37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、上向きでの逆流も防止される。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
クが流出され筆記可能となる。又、上向き筆記を連続す
ると徐々に空気を巻き込む可能性があり、インクの逆流
には至らないが筆記掠れの発生に繋がる可能性がある。
Further, in the second embodiment, FIG. 5 shows the state before writing with the tip 5 facing downward. In this state, the tip ball 5a is pressed by the spring 37 to move the tip ball 5a to the inner edge of the tip holding portion. The direct current of the ink is prevented because the ink is closely contacted with. Also, upward backflow is prevented. Further, since the tip ball 5a is slightly retracted by the writing pressure, a gap is created and the ink flows out to enable writing. Further, when upward writing is continued, there is a possibility that air may be gradually entrained, and although ink backflow does not occur, writing blur may occur.

【0020】又、第3の実施例に於いて、図6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53はリブ49の後端に当接状態となり、導孔4
5が開放される。インク収容管4から導孔45を経て弁
室42に入ったインクは、リブとリブとの間に形成され
た溝等を通過して先端ボール5aの背面まで誘導され
る。又、この状態では、スプリング50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
る。
Further, in the third embodiment, FIG. 6 shows the state before writing with the tip 5 facing downward, at which time the ball valve 53 comes into contact with the rear end of the rib 49 and the guide hole. Four
5 is open. The ink that has entered the valve chamber 42 from the ink containing tube 4 through the guide hole 45 passes through a groove formed between the ribs and is guided to the back surface of the tip ball 5a. Further, in this state, the tip end ball 5a is brought into close contact with the inner edge of the chip holding portion by the pressing of the spring 50, so that direct current of the ink is prevented. Further, since the tip ball 5a is slightly retracted by the writing pressure, a gap is created and ink can flow out.

【0021】又、図7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53が弁室42のボール受
け座43に密接して導孔45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。)
Further, FIG. 7 shows a state in which the tip 5 is directed upward, and at that time, the ball valve 53 comes into close contact with the ball receiving seat 43 of the valve chamber 42 to seal the guide hole 45. Even if the ink immediately below 5a is exhausted, the ink does not flow back. Therefore, the ink can immediately flow out when the tip 5 is turned downward, and blurring in writing can be prevented.
(By the way, in the structure without the ball valve, the ink works backward in the upward writing, so that air is trapped in the tip, and the ink does not immediately follow up in the downward writing, and blurring occurs.
Further, the entrainment of air is accumulated by repeating the upward writing. )

【0022】尚、インクの直流及び逆流はスプリング5
0による先端ボール5aへの押圧で果たされるが、上記
チップ抱持部の加工バラツキによる先端ボール5aとの
密接不完全状態や、チップ抱持部と先端ボール5a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、インクの大きなヘッドを支えてインクの逆流を確実
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 direct current and the reverse flow of ink are applied to the spring 5.
This is achieved by pressing the tip ball 5a with 0. However, solid matter adheres to the tip holding part 5a due to the processing variation of the tip holding part, or the gap between the tip holding part and the tip ball 5a. In order to complement the incomplete close condition of the case, it is necessary to support a large head of ink to reliably prevent backflow of ink, and to alleviate entrainment of air (prevention of blurring).

【0023】[0023]

【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、先端ボールの径がφ0.3、φ0.4
の細書き用に於いて、弁室内に遊嵌するボール弁で導孔
を密閉したり、スプリングの先端で先端ボールの背面を
押圧してチップのボール抱持部の内縁に密接させること
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、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
筆記掠れが防止される。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 structure and operation of the ball-point pen of the present invention are as described above, and the diameter of the tip ball is φ0.3, φ0.4.
For fine writing, the ball valve that fits loosely in the valve chamber closes the guide hole, and the tip of the spring presses the back surface of the tip ball to bring it closer to the inner edge of the ball holding part of the chip. Backflow of ink can be prevented by writing or impact, and accidents that stain the inside of the barrel, hands, clothes, etc. are prevented. Also, since ink immediately follows after upward writing or impact, blurring of writing is prevented. Further, the ball-point pen of the embodiment has the effect that the tip and the mouthpiece are rattled via the joint, so that the writing feeling is good.

【図面の簡単な説明】[Brief description of 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 vertical cross-sectional view of a main part of a ball-point pen that is a first embodiment of the present invention, showing a state in which a tip faces downward.

【図2】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 vertical cross-sectional view of the main parts of the ball-point pen of the first embodiment, showing a state in which the tip faces upward.

【図3】第1の実施例であるボールペンの全体を示す縦
断面図で、その前半部を示している。
FIG. 3 is a vertical cross-sectional view showing the entire ball-point pen of the first embodiment, showing the front half thereof.

【図4】第1の実施例であるボールペンの全体を示す縦
断面図で、その後半部を示している。
FIG. 4 is a vertical cross-sectional view showing the entire ball-point pen of the first embodiment, showing the latter half thereof.

【図5】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、チップを下向きにした状態を示している。
FIG. 5 is a vertical cross-sectional view of a main part of a ball-point pen that is a second embodiment of the present invention, showing a state in which the tip faces downward.

【図6】本発明の第3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. 6 is a vertical cross-sectional view of a main part of a ball-point pen that is a third embodiment of the present invention, showing a state in which the tip faces downward.

【図7】第3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. 7 is a vertical cross-sectional view of a main part of a ball-point pen that is a third embodiment, showing a state where the tip is facing upward.

【符号の説明】 1 軸筒 2 口金 3 継ぎ手 3a ホルダー嵌着孔 4 インク収容管 5 チップ 5a 先端ボール 5b 受け座 6 軸部 7 係止筒部 8 リブ 9 段部 10 ホルダー 10a チップ嵌着孔 10b 段部 11 リブ 12 嵌合筒部 13 鍔部 14 ボール受け座 15 弁室 16 導孔 17 ボール弁 20 キャップ 21 インナーキャップ 22 クリップ 23 通気孔 24 リブ 25 シール栓体 26 インク 27 尾栓 28 フォロア 29 フォロア棒 30 継ぎ手 31 ホルダー嵌着孔 32 内孔 33 導孔 34 ボール受け座 35 段部 36 ホルダー 36a 段部 37 スプリング 38 捲線部 39 ストレート部 40 継ぎ手 41 ホルダー嵌着孔 42 弁室 43 ボール受け座 44 段部 45 導孔 46 ホルダー 47 チップ嵌着孔 48 段部 49 リブ 50 スプリング 51 捲線部 52 ストレート部 53 ボール弁[Explanation of reference symbols] 1 shaft cylinder 2 base 3 joint 3a holder fitting hole 4 ink storage tube 5 chip 5a tip ball 5b receiving seat 6 shaft part 7 locking cylinder part 8 rib 9 step part 10 holder 10a chip fitting hole 10b Step portion 11 Rib 12 Fitting cylinder portion 13 Collar portion 14 Ball receiving seat 15 Valve chamber 16 Guide hole 17 Ball valve 20 Cap 21 Inner cap 22 Clip 23 Vent hole 24 Rib 25 Seal stopper 26 Ink 27 Tail 28 Follower 29 Follower Rod 30 Joint 31 Holder fitting hole 32 Inner hole 33 Guide hole 34 Ball receiving seat 35 Step portion 36 Holder 36a Step portion 37 Spring 38 Winding portion 39 Straight portion 40 Joint 41 Holder fitting hole 42 Valve chamber 43 Ball receiving seat 44 step Part 45 Guide hole 46 Holder 47 Tip fitting hole 48 Step part 49 Rib 50 Spring 51 Winding part 52 Straight part 53 Ball valve

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 継ぎ手の先端にボールペンのチップを、
後方にインク収容管を有して成るボールペンに於いて、
継ぎ手の先端にパイプ状細径のチップの長手外周部を嵌
着するホルダーを圧着すると共に、継ぎ手後方の軸心に
弁室が設けられて、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て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り、上記ホル
ダーの後端に所要数のリブが設けられて上記弁室の前端
に位置され、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リブの後
端にボール弁が当接して導孔、弁室、リブとリブの間に
形成された溝等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 ballpoint pen tip is attached to the tip of the joint.
In a ball-point pen having an ink containing tube in the rear,
The tip of the joint is crimped with a holder that fits the long outer peripheral portion of the pipe-shaped small-diameter tip, the valve chamber is provided in the axial center behind the joint, and the tapered or spherical ball receiver is provided at the rear of the valve chamber. A ball valve provided with a seat for allowing close contact with the ball receiving seat is loosely fitted in the valve chamber, and a required number of ribs are provided at the rear end of the holder and positioned at the front end of the valve chamber. When the side is upward, the ball valve is in close contact with the ball seat to close the guide hole, and when the tip side is downward, the closed state is released and the ball valve abuts on the rear end of the rib so that the guide hole and valve A ballpoint pen characterized in that ink is allowed to flow into a chip through a chamber, a groove formed between ribs, and the like.
【請求項2】 継ぎ手の先端にボールペンのチップを、
後方にインク収容管を有して成るボールペンに於いて、
継ぎ手の先端にパイプ状細径のチップの長手外周部を嵌
着するホルダーを圧着すると共に後方に内孔が設けら
れ、その内孔の後方段部に後端部を当接した状態で前方
にスプリングが附勢されて、スプリングの先端でチップ
先端部に回転自在に抱持された先端ボールの背面を押圧
して先端ボールがチップのボール抱持部の内縁に密接さ
れて成るボールペン。
2. A tip of a ballpoint pen at the tip of the joint,
In a ball-point pen having an ink containing tube in the rear,
The tip of the joint is crimped with a holder that fits the long outer peripheral portion of the pipe-shaped small-diameter tip, and an inner hole is provided in the rear, and the rear end of the inner hole is in contact with the rear end of the joint. A ballpoint pen in which a spring is energized and the tip of the spring presses the back surface of a tip ball rotatably held by the tip portion of the tip to bring the tip ball into close contact with the inner edge of the ball holding portion of the tip.
【請求項3】 上記内孔を弁室として、弁室の後端にテ
ーパー状又は球面状のボール受け座が設けられてボール
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
れて成り、ホルダーの後端に所要数のリブが設けられて
上記弁室の前端に位置され、更に、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
ると共に上記リブの後端にボール弁が当接して導孔、弁
室、リブとリブの間に形成された溝等を通じてチップ内
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
上記請求項2記載のボールペン。
3. A ball valve having a tapered or spherical ball seat provided at the rear end of the valve chamber with the inner hole serving as a valve chamber, and a ball valve which can be brought into close contact with the ball seat is loosely fitted in the valve chamber. The holder is provided with a required number of ribs at the rear end and is located at the front end of the valve chamber.Furthermore, when the tip side is facing upward, the ball valve is in close contact with the ball receiving seat and the guide hole is sealed. When the side faces downward, the sealed state is released and the ball valve comes into contact with the rear end of the rib so that ink flows into the chip through the guide hole, the valve chamber, the groove formed between the rib and the like. The ball-point pen according to claim 2, wherein the ball-point pen is configured as follows.
【請求項4】 スプリングの先方に直立状のストレート
部が、後方に捲線部が形成されて、チップ内孔にストレ
ート部が嵌挿し、捲線部が弁室内に嵌挿されて、捲線部
の後端が弁室の後方段部に当接してストレート部の先端
で先端ボールの背面が押圧されると共に捲線部の内径空
間部にボール弁が遊嵌されて成る上記請求項3記載のボ
ールペン。
4. An upright straight portion is formed at the tip of the spring, and a winding portion is formed at the rear of the spring. The straight portion is inserted into the chip inner hole, and the winding portion is inserted into the valve chamber. 4. The ball-point pen according to claim 3, wherein the end contacts the rear step of the valve chamber, the back surface of the tip ball is pressed by the tip of the straight part, and the ball valve is loosely fitted in the inner diameter space of the winding part.
【請求項5】 インク収容管には低粘度のインク又は基
本的には低粘度であるが、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、イ
ンクの後端にはインクの消耗と共に追随するフォロアが
設けられて成る上記請求項1、2、3及び4記載のボー
ルペン。
5. The ink containing tube has a low viscosity ink or basically has a low viscosity, but has a statically high viscosity, and the viscosity is lowered by the rotation of the tip ball during writing, and the ink is The ball-point pen according to any one of claims 1, 2, 3 and 4, wherein the flow-out ink is filled with ink having a so-called shear thinning viscosity, and a follower is provided at a rear end of the ink to follow the exhaustion of the ink.
【請求項6】 継ぎ手の後端に別体のインク収容管が圧
着されて成る上記請求項1、2、3、4及び5記載のボ
ールペン。
6. The ball-point pen according to claim 1, wherein a separate ink storage tube is pressure-bonded to the rear end of the joint.
JP06349195A 1995-02-28 1995-02-28 Ballpoint pen Expired - Fee Related JP3333059B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06349195A JP3333059B2 (en) 1995-02-28 1995-02-28 Ballpoint pen

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP06349195A JP3333059B2 (en) 1995-02-28 1995-02-28 Ballpoint pen
US08/601,246 US5678942A (en) 1995-02-28 1996-02-14 Ball-point pen
FR9602385A FR2730944B1 (en) 1995-02-28 1996-02-27 BALLPOINT PEN

Publications (2)

Publication Number Publication Date
JPH08230378A true JPH08230378A (en) 1996-09-10
JP3333059B2 JP3333059B2 (en) 2002-10-07

Family

ID=13230778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP06349195A Expired - Fee Related JP3333059B2 (en) 1995-02-28 1995-02-28 Ballpoint pen

Country Status (1)

Country Link
JP (1) JP3333059B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100335295C (en) * 2002-02-12 2007-09-05 三菱铅笔株式会社 Ball point pen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5271057B2 (en) * 2008-11-28 2013-08-21 ゼブラ株式会社 Ballpoint pen tip
JP5204642B2 (en) * 2008-12-25 2013-06-05 ゼブラ株式会社 Ballpoint pen tip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100335295C (en) * 2002-02-12 2007-09-05 三菱铅笔株式会社 Ball point pen

Also Published As

Publication number Publication date
JP3333059B2 (en) 2002-10-07

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