JP3471417B2 - Ballpoint pen - Google Patents
Ballpoint penInfo
- Publication number
- JP3471417B2 JP3471417B2 JP09703494A JP9703494A JP3471417B2 JP 3471417 B2 JP3471417 B2 JP 3471417B2 JP 09703494 A JP09703494 A JP 09703494A JP 9703494 A JP9703494 A JP 9703494A JP 3471417 B2 JP3471417 B2 JP 3471417B2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- ball
- ink
- rear end
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Pens And Brushes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、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 property, which statically has a high viscosity, and the viscosity is lowered by the rotation of a ball during writing to cause the ink to flow out. Regarding improvement of ballpoint pen.
【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 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 suppresses 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. Also, since the viscosity of the ink is low and the amount of outflow is large, if the tip side is facing downward, the ink will bleed if there is a gap between the tip ball and the tip crimping portion (DC).
There is a problem.
【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。又、上向き筆記、衝撃が加わった時の
先端ボール直下の空気巻き込みに伴うインク切れで起き
る筆記掠れを防止することと、先端ボールとチップ抱持
部の内縁とのシール不完全に伴う乾燥で起きる筆記掠れ
を防止可能とする。SUMMARY OF THE INVENTION An object of the present invention is to improve a ballpoint pen which uses ink having a shear thinning property in which the viscosity is lowered by the rotation of the ball during writing and the ink flows out. It is possible to prevent ink backflow caused by upward writing and impact and direct current when the tip side is placed downward, and to prevent stains in the ball-point pen barrel, hands, and clothes. In addition, it prevents writing blurring that occurs due to ink running out due to air entrainment directly under the tip ball when an upward writing or impact is applied, and occurs due to incomplete drying between the tip ball and the inner edge of the chip holding part. It is possible to prevent blurring of 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設けられ、弁室の後部にテーパー状
又は球面状のボール受け座が、弁室の前方に段部が設け
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、上記段部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上記スプリングの
後端にボール弁が当接して導孔、弁室を通じてチップ内
孔部にインクが流入可能となる。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 fixed to a joint end and an ink containing tube fixed to a rear end. , A valve chamber is provided at the rear of the tip of the joint so as to communicate with the rear end of the tip of the joint, a tapered or spherical ball receiving seat is provided at the rear of the valve chamber, and a step is provided at the front of the valve chamber. A ball valve that can be brought into close contact with the ball receiving seat is loosely fitted in the valve chamber, and a spring is biased to the chip inner hole with the rear end abutting against the stepped portion, and the tip end of the chip is located at the tip of the spring. The rear end of the tip ball that is rotatably held by the tip is brought into close contact with the inner edge of the ball holding part of the tip, and when the tip side is facing upward, the ball valve comes into close contact with the ball receiving seat. Is closed, and when the tip side is facing downward, it is closed Bore hole the ball valve at the rear end of the spring while being released in contact, the ink is possible flow into the tip lumen through the valve chamber.
【０００５】[0005]
【実施例】図１乃至図３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 to 3 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. A tip fitting hole 10 is formed in the locking cylinder portion 7 from the front end, and the tip 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 locking portion 11a is formed on the shaft portion 11 of the chip, if necessary, so that the chip fitting hole 10 has a slightly small hole behind the chip fitting hole 10. The engaging portion 11a is engaged with the hole 10 "in a biting manner.
【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。尚、
チップ嵌着孔１０｀の後端に段部１６を有して弁室１３
は若干小径と成され、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２１が形成されて、弁室１３内にはボール弁１５が遊
嵌される。The joint 3 is integrally formed of an elastically deformable synthetic resin, and has the chip fitting holes 10 and 1.
A valve chamber 13 is provided on the rear side of the valve chamber so as to communicate with "0". still,
The valve chamber 13 has a step 16 at the rear end of the tip fitting hole 10 ".
Has a slightly smaller diameter, and a tapered or spherical ball receiving seat 14 is provided at the rear end of the valve chamber 13.
Further, a guide hole 21 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.
【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、前記段部１６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、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。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。On the other hand, the tip 5 is crimped so that the tip ball 5a is rotatably held in a state where the tip ball 5a is substantially in contact with a seat having a channel 5b into which ink can flow. Further, the spring 17 is biased to the inner hole of the chip 5 with the rear end portion abutting on the step portion 16. An upright rod shaft portion 18 is formed ahead of the spring 17, and the tip end of the rod shaft portion 18 abuts the rear end of the tip ball 5a 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 its pressing.
【０００８】又、スプリング１７後端の座部１９にはス
プリングの中心に向かって折曲端部１９ａが形成され、
チップ側が下向きの際にボール弁１５が折曲端部１９ａ
に当接してボール弁１５が弁室１３から抜出不能に成さ
れている。Further, a bent end portion 19a is formed on the seat portion 19 at the rear end of the spring 17 toward the center of the spring.
When the tip side is facing downward, the ball valve 15 has the bent end portion 19a.
The ball valve 15 is incapable of being pulled out from the valve chamber 13 by abutting against.
【０００９】以上により、チップ側が下向きの時に前記
ボール弁１５が前記折曲端部１９ａに当接状態となり、
インクが導孔２１、弁室１３、チップ５の内孔部を通じ
て先端ボール５ａの後端まで流入可能と成される。尚、
スプリング１７の後端と上記段部１６の間に適宜インク
誘導溝を穿設した板又はコマ部材を介在させてボール弁
１５を抜出不能に成すことも可能である。As described above, the ball valve 15 comes into contact with the bent end portion 19a when the tip side faces downward,
The ink can flow into the rear end of the tip ball 5a through the guide hole 21, the valve chamber 13, and the inner hole of the chip 5. still,
It is also possible to make the ball valve 15 incapable of withdrawing by interposing a plate or a top member having an ink guide groove appropriately formed between the rear end of the spring 17 and the step portion 16.
【００１０】又、継ぎ手３の前記係止筒部７の後端には
鍔部２０が設けられ、鍔部２０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２０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
１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
状又はシリコンゴム等のフォロアが充填される。（図示
せず）A flange portion 20 is provided at the rear end of the locking cylinder portion 7 of the joint 3, and a fitting cylinder portion 12 is provided behind the flange portion 20.
Has been extended. A cylindrical ink containing tube 4 is press-fitted and fixed to the outer periphery of the fitting cylindrical portion 12 by abutting the tip of the cylindrical ink containing tube 4 to the rear end of the collar portion 20, and the inner diameter of the ink containing tube 4 is guided to the guide hole 2 of the joint 3.
It communicates with 1. The ink containing tube 4 is filled with an ink 22 having a statically high viscosity and a shear thinning property that reduces the viscosity by the rotation of the ball during writing and allows the ink to flow out. The rear end of 22 is filled with a follower such as grease or silicone rubber that can move following 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２０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 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 2 with the rear end edge of the collar portion 20 abutting against each other and the step portion 9 provided on the inner surface portion thereof, and the step portion 9 abutting against the peripheral surface of the rib 8 of the joint 3 A ball-point pen is constructed by being screwed onto the shaft portion 6.
【００１２】ところで、図４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。By the way, FIG. 4 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 fitted in the chip 5 forms a seat, and the pusher body 30 having the rod shaft portion 31 is arranged at the front portion thereof, and the tip end of the rod shaft portion 31 is the rear end of the tip ball 5a. Abutting against.
【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はスプリング１
７の折曲端部１９ａに当接状態となり、導孔２１が開放
される。インク収容管４から導孔２１を経て弁室１３に
入ったインク２２は先端先端ボール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、濃度の濃い筆記
が可能となる。First, FIG. 1 shows a state before writing with the tip 5 facing downward, and at that time, the ball valve 15 has the spring 1
The bent end portion 19a of No. 7 is brought into contact with the bent end portion 19a, and the guide hole 21 is opened. The ink 22 that has entered the valve chamber 13 from the ink containing tube 4 through the guide hole 21 is guided to the rear end of the front end 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 18, so that direct current of ink is prevented. In addition, since the tip ball 5a is slightly retracted by the writing pressure, a gap is created to allow the ink to flow out, and the writing reduces the viscosity due to the rotation of the tip ball 5a, causing a large amount of the ink to flow out. Strong writing is possible.
【００１４】尚、先端ボール５ａの直下にはチャンネル
５ｂ（チップ内孔に向かって貫通したインク流入溝を複
数箇所に有した先端ボールの受け座）がありチャンネル
５ｂの中心孔には棒軸部１８が貫通する。チップ内のイ
ンクはインク流入溝及び中心孔と棒軸部１８との間の隙
間を通じて先端ボール直下に誘導される。Directly below the tip ball 5a, there is a channel 5b (tip ball receiving seat having ink inflow grooves penetrating toward the chip inner hole at a plurality of locations), and a rod shaft portion is provided in the center hole of the channel 5b. 18 penetrates. The ink in the chip is guided right below the tip ball through the ink inflow groove and the gap between the center hole and the rod shaft portion 18.
【００１５】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２１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. 2 shows a state in which the tip 5 is directed upward, and at that time, the ball valve 15 is in close contact with the ball receiving seat 14 of the valve chamber 13 and seals the guide hole 21. 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. )
【００１６】又、先端ボール５ａ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で筆記掠れが防
止される。又、先端ボール５ａとボール弁１５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防
止されるので筆記掠れが防止される。又、チップ内孔部
形状に沿ってスプリング１７の捲線部を適宜設けること
によりインク流量の調整や上向き筆記時の先端ボール直
下のインクの逆流傾向（筆記掠れに影響する）が緩和さ
れる。Further, since the tip ball 5a is always in close contact with the inner edge of the tip holding portion, the tip portion is dried to prevent writing blurring. Further, by the joint action of the tip ball 5a and the ball valve 15, even if an upward writing or an impact is applied, the entrainment of air is prevented, so that the writing blurring is prevented. Further, by appropriately providing the winding portion of the spring 17 along the shape of the hole in the tip, the flow rate of the ink is adjusted and the backflow tendency of the ink immediately below the tip ball at the time of upward writing (which affects writing blurring) is mitigated.
【００１７】又、図４に示す第２の実施例は第１の実施
例と基本的に同じなので要点のみ説明する。先ず、スプ
リング３２の前端に別体の押し体３０を設けたことで棒
軸部３１の揺動性が良く、先端ボール５ａと当接する部
位の摩擦抵抗の選択（材質、形状）できるので筆感が良
い。Since the second embodiment shown in FIG. 4 is basically the same as the first embodiment, only the essential points will be described. First, by providing a separate push body 30 at the front end of the spring 32, the swingability of the rod shaft portion 31 is good, and it is possible to select the frictional resistance (material, shape) of the portion in contact with the tip ball 5a. Is good.
【００１８】又、実施例は従来例のようにボール弁を抜
出不能に当接する突条がないので継ぎ手３を成形する金
型精度や成形条件が楽になる。（因みに突条は金型の離
型でアンダーカットになるので寸法精度が出しにくい）
又、弁室にボール弁を嵌挿することが容易となり（突条
は弾性変形を利用してボール弁を嵌挿するので突条を損
傷する問題が存在する）機械組みに有利となる。Further, in the embodiment, unlike the conventional example, since there is no protrusion that abuts the ball valve in a non-removable manner, the precision of the mold for molding the joint 3 and the molding conditions become easier. (By the way, the ridges are undercut when the mold is released, so it is difficult to obtain dimensional accuracy.)
In addition, it becomes easy to fit and insert the ball valve into the valve chamber (the projection has a problem of damaging the projection because the ball valve is fitted and inserted by utilizing elastic deformation), which is advantageous for a machine assembly.
【００１９】又、実施例のボールペンのリフィールを軸
筒１に搭載した際に、継ぎ手３の鍔部２０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との間のガタが防止される。Further, when the refill of the ballpoint pen of the embodiment is mounted on the barrel 1, the base 2 is screwed with the collar portion 20 of the joint 3 abutting against the front end of the shaft portion 6, and at that time, it is locked. The ribs 8 of the tubular portion 7 bite against the stepped portion 9 of the mouthpiece 2 in a biting manner, so that play between the tip 5 and the mouthpiece 2 is prevented.
【００２０】[0020]
【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、乾燥による筆記掠れも防止される。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も奏する。The structure and operation of the ball-point pen of the present invention are as described above, and the ball valve loosely fitted in the valve chamber can prevent backflow of ink due to upward writing and impact.
Also, 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 tip ball is placed downward, and accidents that stain the inside of the barrel, hands, clothes, etc. are prevented. Moreover, since ink immediately follows after upward writing or impact, blurring is prevented. Further, blurring of writing due to drying is also prevented. Further, in the ballpoint pen of the embodiment, the tip and the mouthpiece are rattled via the joint, so that there is an effect that the writing feeling is good.
【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】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 a main part of a ball-point pen that is an embodiment, showing a state in which the tip is facing upward.
【図３】実施例に使用されるスプリングの後端部の形状
を示した拡大図である。FIG. 3 is an enlarged view showing a shape of a rear end portion of a spring used in an embodiment.
【図４】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. 4 is a longitudinal 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 is facing upward.
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 １０｀ チップ嵌着孔 １１ 軸部 １１ａ 係止部 １２ 嵌合筒部 １３ 弁室 １４ ボール受け座 １５ ボール弁 １６ 段部 １７ スプリング １８ 棒軸部 １９ 座部 １９ａ 折曲端部 ２０ 鍔部 ２１ 導孔 ２２ インク ３０ 押し体 ３１ 棒軸部 ３２ スプリング 1-axis cylinder 2 clasp 3 joints 4 Ink storage tube 5 chips 5a tip ball 5b channel 6 shafts 7 Locking cylinder 8 ribs 9 steps 10 chip fitting holes 10 "tip fitting hole 11 Shaft 11a Locking part 12 Fitting cylinder 13 valve chamber 14 ball seat 15 ball valve 16 steps 17 spring 18 Bar shaft 19 seat 19a bent end 20 Tsuba 21 guide hole 22 ink 30 push body 31 Bar shaft 32 spring
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平６−21773（ＪＰ，Ｕ) 実開 平６−21978（ＪＰ，Ｕ) 特許3197422（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B43K 7/00 - 7/12 B43K 1/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography 6-21773 (JP, U) Bibliography 6-21978 (JP, U) Patent 3197422 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) B43K 7/ 00-7/12 B43K 1/08
Claims (4)
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
が設けられ、弁室の後部にテーパー状又は球面状のボー
ル受け座が、弁室の前方に段部が設けられて、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、上記段部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スプリングの後端
にボール弁が当接して導孔、弁室を通じてチップ内孔部
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 with an ink storage tube fixed to the rear end, a valve chamber is provided at the rear of the tip of the joint, communicating with the rear end of the tip at the axis of the joint, and a tapered or spherical ball receiver is provided at the rear of the valve chamber. The seat has a stepped portion in front of the valve chamber, and a ball valve that allows close contact with the ball receiving seat is loosely fitted in the valve chamber, and the rear end portion of the ball valve is in contact with the stepped portion. The spring is biased to press the rear end of the tip ball rotatably held by the tip of the spring at the tip of the spring, the tip ball is brought into close contact with the inner edge of the ball holding portion of the tip, and the tip side is When facing upward, the ball valve comes into close contact with the ball receiving seat to seal the guide hole, and when the tip side is facing downward, the sealed state is released and the ball valve contacts the rear end of the spring so that the guiding hole and the valve chamber. So that the ink flows into the hole inside the chip through Ballpoint pen characterized in that it is configured.
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. The ink storage tube is filled with ink having a so-called shear thinning viscosity, which statically has a high viscosity and is reduced by the rotation of the tip ball during writing to cause the ink to flow out. 2. The ballpoint pen according to claim 1, wherein the contact state 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 as the tip ball rotates. .
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、スプリング後端の座部に中心に向かう折曲端
部を設けて、該折曲端部でボール弁が抜出不能に当接す
るように構成した上記請求項２記載のボールペン。3. An upright rod shaft portion is formed at the tip of the spring, and the tip of the rod shaft portion is provided so as to press the rear end of the tip ball, and is bent toward the center of the seat portion at the rear end of the spring. The ball-point pen according to claim 2, wherein an end portion is provided so that the ball valve comes into contact with the bent end portion in a non-pullable manner.
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、スプリング後端の座部に
中心に向かう折曲端部を設けて、該折曲端部でボール弁
が抜出不能に当接するように構成した上記請求項２記載
のボールペン。4. A push body having a rod shaft portion is fitted at the front end of the spring so as to be axially movable, and the tip of the rod shaft portion is provided so as to press the rear end of the tip ball, and a seat portion at the rear end of the spring is provided. 3. The ball-point pen according to claim 2, wherein the ball valve has a bent end portion directed toward the center, and the ball valve abuts on the bent end portion in a non-pullable manner.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09703494A JP3471417B2 (en) | 1994-04-12 | 1994-04-12 | Ballpoint pen |
| CN94191080A CN1043625C (en) | 1993-12-06 | 1994-12-05 | Ball-point pen |
| US08/501,077 US5711626A (en) | 1993-12-06 | 1994-12-05 | Ball-point pen with back flow stop |
| DE69423880T DE69423880T2 (en) | 1993-12-06 | 1994-12-05 | PEN |
| KR1019950703192A KR960700158A (en) | 1993-12-06 | 1994-12-05 | Ball pen (BALL-POINT PEN) |
| CA002153589A CA2153589C (en) | 1993-12-06 | 1994-12-05 | A ball-point pen |
| PCT/JP1994/002040 WO1995015859A1 (en) | 1993-12-06 | 1994-12-05 | Ball-point pen |
| EP95902303A EP0685348B1 (en) | 1993-12-06 | 1994-12-05 | Ball-point pen |
| KR1019950703192A KR0151506B1 (en) | 1993-12-06 | 1994-12-05 | Ball-point pen |
| US08/927,361 US5915871A (en) | 1993-12-06 | 1997-09-09 | Ball-point pen cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09703494A JP3471417B2 (en) | 1994-04-12 | 1994-04-12 | Ballpoint pen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07276876A JPH07276876A (en) | 1995-10-24 |
| JP3471417B2 true JP3471417B2 (en) | 2003-12-02 |
Family
ID=14181229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09703494A Expired - Lifetime JP3471417B2 (en) | 1993-12-06 | 1994-04-12 | Ballpoint pen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3471417B2 (en) |
-
1994
- 1994-04-12 JP JP09703494A patent/JP3471417B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07276876A (en) | 1995-10-24 |
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