JP2004025761A - Refill for writing instrument - Google Patents

Refill for writing instrument Download PDF

Info

Publication number
JP2004025761A
JP2004025761A JP2002188874A JP2002188874A JP2004025761A JP 2004025761 A JP2004025761 A JP 2004025761A JP 2002188874 A JP2002188874 A JP 2002188874A JP 2002188874 A JP2002188874 A JP 2002188874A JP 2004025761 A JP2004025761 A JP 2004025761A
Authority
JP
Japan
Prior art keywords
joint
refill
ink
synthetic resin
writing instrument
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.)
Pending
Application number
JP2002188874A
Other languages
Japanese (ja)
Inventor
Akira Matsukawa
松川 亮
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.)
Sailor Pen Co Ltd
Original Assignee
Sailor Pen 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 Sailor Pen Co Ltd filed Critical Sailor Pen Co Ltd
Priority to JP2002188874A priority Critical patent/JP2004025761A/en
Publication of JP2004025761A publication Critical patent/JP2004025761A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Pens And Brushes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refill for a writing instrument by which a gap is not generated between the distal end edge of an ink housing tube and the flange part of a joint when a fitting cylindrical part of the joint made of a synthetic resin is press-fitted in the distal end opening of the ink housing tube made of a synthetic resin, a total length management of the refill is easy, and the appearance is not poor as well. <P>SOLUTION: The fitting cylindrical part of the joint 30 made of the synthetic resin for which the fitting cylindrical part 34 is formed on the tail end side of the flange part 33 is press-fitted in the distal end opening of the ink housing tube made of the synthetic resin, in which an ink is filled. Then, a pen body is connected with the central hole of the joint for this refill for a writing instrument. In the refill for the writing instrument, an annular groove 35 is formed at a section being adjacent to the flange part while being the front end of the fitting cylindrical part of the joint. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は筆記具の軸筒内に搭載されるレフィールに関するものである。
【0002】
【従来の技術】
筆記具、例えばボールペンの軸筒内に搭載されるレフィールは、ペン体であるボールペンチップが中心孔に嵌着された継手が、インキが充填されたインキ収容管の先端開口に継手が圧入され、インキ収容管内のインキがボールペンチップに回転自由に抱持されたボールに供給されて筆記に供される。
【0003】
図4は、静的には高い粘性を有し、筆記時のボールの回転により粘性が低下するゲルインキがインキ収容管に充填されたボールペンレフィールにおける継手30とインキ収容管21の接続状態の従来例を示すが、合成樹脂製の継手30には鍔部33が形成され、鍔部33の尾端側がやや大径の嵌着筒部34である。そして、継手30の嵌着筒部34が合成樹脂製のインキ収容管21の先端開口に圧入される。
【0004】
【発明が解決しようとする課題】
この圧入の過程で嵌着筒部34の表面の合成樹脂が鍔部33方向に弾性変形される。そして、インキ収容管21の先端縁を鍔部33に当接するまで圧入するが、圧入が完了した後に、鍔部33方向に弾性変形された嵌着筒部34の表面の合成樹脂が鍔部33と反対方向にスプリングバッグする。このため、インキ収容管21も鍔部33と反対方向に移動し、インキ収容管21の先端縁と鍔部33との間に0.1〜0.5mm程度の隙間Sが形成される。従って、レフィールの全長にばらつきが生じるので全長管理が困難になり、更には、外観上も見苦しい不具合がある。
【0005】
そこで本発明は、合成樹脂製の継手の嵌着筒部を合成樹脂製のインキ収容管の先端開口に圧入する際に、インキ収容管の先端縁と継手の鍔部との間に隙間が生じることがなく、レフィールの全長管理が容易で外観上も見苦しくない筆記具用レフィールを提供することを目的とする。
【0006】
【課題を解決するための手段】
かかる目的を達成するために、本発明は、鍔部の尾端側に嵌着筒部が形成された合成樹脂製の継手の嵌着筒部が、インキが充填された合成樹脂製のインキ収容管の先端開口に圧入され、継手の中心孔にペン体が接続された筆記具用レフィールにおいて、継手の嵌着筒部の前端であって鍔部に隣接する部分に円環状の溝を形成する。
【0007】
【発明の実施の形態】
以下に、図面に基づいて本発明の実施の形態を具体的に説明する。図1はホールペンに本発明を適用した例を示すがボールペンに限られるものではない。図1において、軸筒10は、その先端にテーパー状をした先口部11が合成樹脂で一体に成形されている。この先口部11は軸筒10と別部品にして軸筒10の先端開口に接続してもよい。軸筒10の尾端開口には尾栓13が嵌着されている。そして、軸筒10内にレフィール20が搭載されてい。
非使用時にはキャップ40が軸筒10の先端部に嵌着され、ボールペンチップ23の先端が、軟弾性体からなるシールボール41に埋没し、インキの蒸発が防止される。
【0008】
レフィール20のインキ収容管21の先端開口に後に説明する継手30が嵌着され、継手30の中心孔にペン体部であるボールペンチップ23が嵌着されている。インキ収容管21内にはインキIが充填され、インキIの後端にはグリース状の逆流防止体24が配置されている。そして、逆流防止体24内には、円柱状をした駒25が配置されている。
【0009】
インキIは、着色剤である顔料または染料、樹脂、増粘剤、水溶性溶剤を含み、必要に応じて分散剤、防腐剤などを含有し、静的には高い粘性を有し、筆記時のボールの回転により粘性が低下するゲルインキである。このインキIの粘度は20mPa・s以上である。また、逆流防止体24は、ポリブデン、シリコーンオイル、鉱物油などを主成分とし、シリカゲル、金属石鹸などで適度に増粘させたものである。駒25は比重が逆流防止体24とほぼ等しく、合成樹脂にて円柱状に成形されている。
【0010】
ボールペンチップ23はステンレスにて砲弾型に成形されたものであり、ボールペンチップ23先端のボールハウス内に、例えば外径が0.5mmであり、超硬合金からなるボール26が回転自由に抱持されている。ボールペンチップ23内には小さなスプリング(図示せず)が配置されており、ボール26はこのスプリングで弾発され、非筆記時においてボールペンチップ23先端の内向き突起に圧接している。つまり、ボール26とボールペンチップ23先端の内向き突起により弁機構を構成しており、非筆記時は弁が閉じてインキがボールペンチップ23先端から流出せず、また、上向きにしたときも弁が閉じているのでボールペンチップ23先端から空気が内部に侵入しないようになっている。そして、筆記時においては、筆圧によりボール26が後退して弁が開き、インキが流出するようになっている。
【0011】
ここで、合成樹脂で成形された継手30は、図2に示すように、鍔部33の前方がテーパー部31であり、その中心孔32に、前述のとおり、ボールペンチップ23が嵌着される。鍔部33の尾端側は、外径がインキ収容管21の自然状態における内径よりもわずかに大きい嵌着筒部34である。そして、嵌着筒部34の前端であって鍔部33に隣接する部分に円環状の溝35が形成されている。溝35の幅は0.5〜2.0mm程度であり、外径はインキ収容管21の自然状態における内径にほぼ等しくなっている。
【0012】
しかして、継手30の嵌着筒部34を合成樹脂製のインキ収容管21の先端開口に圧入するとき、その過程でインキ収容管21の内径が拡大するとともに、嵌着筒部34の表面の合成樹脂が鍔部33方向に弾性変形される。そして、インキ収容管21の先端縁を鍔部33に当接するまで圧入するが、図3に示すように、鍔部33に隣接する部分に円環状の溝35が形成されているので、インキ収容管21の先端部21aは自然状態の内径に復元して溝35に嵌り込む。従って、鍔部33方向に弾性変形された嵌着筒部34の表面の合成樹脂が鍔部33と反対方向にスプリングバッグしても、インキ収容管21の先端部21aが溝35に嵌り込んでロックされているので、インキ収容管21は鍔部33の反対方向に移動しない。つまり、鍔部33とインキ収容管21の先端縁の間に図4に示す隙間Sが形成されず、従って、全長管理が容易で外観上も見苦しくないレフィールとすることができる。
【0013】
【発明の効果】
以上説明したように、本発明は、鍔部の尾端側に嵌着筒部が形成された合成樹脂製の継手の嵌着筒部が、インキが充填された合成樹脂製のインキ収容管の先端開口に圧入され、継手の中心孔にペン体が接続された筆記具用レフィールにおいて、継手の嵌着筒部の前端であって鍔部に隣接する部分に円環状の溝を形成したので、合成樹脂製の継手の嵌着筒部を合成樹脂製のインキ収容管の先端開口に圧入する際に、インキ収容管の先端縁と継手の鍔部との間に隙間が生じることがなく、レフィールの全長管理が容易で外観上も見苦しくない筆記具用レフィールとすることができる。
【図面の簡単な説明】
【図1】ボールペンの断面図である。
【図2】本発明実施例の継手の断面図である。
【図3】本発明実施例の継手とインキ収容管の接続状態の説明図である。
【図4】従来例の説明図である。
【符号の説明】
10  軸筒
11  先口部
13  尾栓
20  レフィール
21  インキ収容管
23  ボールペンチップ
24  逆流防止体
25  駒
26  ボール
30  継手
31  テーパー部
32  中心孔
33  鍔部
34  嵌着筒部
35  溝
40  キャップ
41  シールボール
I  インキ
S  隙間
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refill mounted in a barrel of a writing instrument.
[0002]
[Prior art]
For a writing instrument, for example, a refill mounted in the barrel of a ballpoint pen, a joint in which a ballpoint pen tip, which is a pen body, is fitted in a center hole is pressed into a tip opening of an ink storage tube filled with ink. The ink in the storage tube is supplied to a ball held rotatably by a ball-point pen tip and is used for writing.
[0003]
FIG. 4 shows a conventional example of a connection state between the joint 30 and the ink storage tube 21 in a ball-point pen refill filled with an ink storage tube having gel ink whose viscosity is statically high and viscosity is reduced by rotation of the ball during writing. The flange 30 is formed on the synthetic resin joint 30, and the tail end side of the flange 33 is a fitting cylinder 34 having a slightly larger diameter. Then, the fitting cylinder portion 34 of the joint 30 is press-fitted into the distal end opening of the ink container 21 made of synthetic resin.
[0004]
[Problems to be solved by the invention]
During this press-fitting process, the synthetic resin on the surface of the fitting cylinder 34 is elastically deformed toward the flange 33. Then, the press-fitting is performed until the leading edge of the ink storage tube 21 comes into contact with the flange portion 33. After the press-fitting is completed, the synthetic resin on the surface of the fitting tube portion 34 elastically deformed in the direction of the flange portion 33 is applied. Spring bag in the opposite direction. For this reason, the ink container 21 also moves in the direction opposite to the flange 33, and a gap S of about 0.1 to 0.5 mm is formed between the leading edge of the ink container 21 and the flange 33. Therefore, since the total length of the refill varies, it becomes difficult to control the total length, and furthermore, there is a problem that the appearance is unsightly.
[0005]
Therefore, according to the present invention, when the fitting tube portion of the synthetic resin joint is press-fitted into the distal end opening of the synthetic resin ink storage tube, a gap is formed between the distal end edge of the ink storage tube and the flange portion of the joint. It is an object of the present invention to provide a writing instrument refill that is easy to control and that the appearance of the refill is easy to see and the appearance of the refill is easy to see.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention relates to a synthetic resin joint in which a fitting tube portion is formed on the tail end side of a flange portion, wherein the fitting tube portion of a synthetic resin ink filled with ink is provided. In the refill for a writing instrument, which is press-fitted into a distal end opening of a pipe and a pen body is connected to a center hole of the joint, an annular groove is formed at a front end of a fitting tube portion of the joint and adjacent to a flange portion.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 shows an example in which the present invention is applied to a hole pen, but is not limited to a ballpoint pen. In FIG. 1, a shaft cylinder 10 has a tapered front end 11 formed integrally with a synthetic resin at the tip. The front opening 11 may be formed as a separate component from the barrel 10 and connected to the opening at the distal end of the barrel 10. A tail plug 13 is fitted into the tail end opening of the barrel 10. A refill 20 is mounted in the shaft cylinder 10.
When not in use, the cap 40 is fitted to the tip of the barrel 10, and the tip of the ballpoint pen tip 23 is buried in the seal ball 41 made of a soft elastic material, thereby preventing evaporation of the ink.
[0008]
A joint 30, which will be described later, is fitted to a distal end opening of the ink storage tube 21 of the refill 20, and a ballpoint pen tip 23 as a pen body is fitted to a center hole of the joint 30. The ink storage tube 21 is filled with the ink I, and a grease-like backflow prevention body 24 is disposed at the rear end of the ink I. A column-shaped piece 25 is arranged inside the backflow prevention body 24.
[0009]
Ink I contains a pigment or dye as a colorant, a resin, a thickener, a water-soluble solvent, and optionally contains a dispersant, a preservative, etc., has a high static viscosity, and has a high viscosity at the time of writing. Is a gel ink whose viscosity decreases as the ball rotates. The viscosity of the ink I is 20 mPa · s or more. The backflow prevention member 24 is mainly composed of polybutene, silicone oil, mineral oil, or the like, and is appropriately thickened with silica gel, metal soap, or the like. The piece 25 has a specific gravity substantially equal to that of the backflow prevention body 24 and is formed of a synthetic resin into a column shape.
[0010]
The ballpoint pen tip 23 is made of a stainless steel and has a shell shape. A ball 26 having an outer diameter of, for example, 0.5 mm and made of a cemented carbide is rotatably held in a ball house at the tip of the ballpoint pen tip 23. Have been. A small spring (not shown) is arranged in the ballpoint pen tip 23, and the ball 26 is repelled by this spring, and presses against the inward projection at the tip of the ballpoint pen tip 23 during non-writing. In other words, the valve mechanism is constituted by the ball 26 and the inward projection at the tip of the ballpoint pen tip 23. When writing is not performed, the valve closes and the ink does not flow out of the tip of the ballpoint pen tip 23. Since it is closed, air does not enter the inside from the tip of the ballpoint pen tip 23. At the time of writing, the ball 26 retreats due to the writing pressure, the valve opens, and the ink flows out.
[0011]
As shown in FIG. 2, the joint 30 formed of a synthetic resin has a tapered portion 31 in front of a flange 33, and the ballpoint pen tip 23 is fitted into the center hole 32 of the joint 30 as described above. . The tail end side of the flange portion 33 is a fitting tube portion 34 whose outer diameter is slightly larger than the inner diameter of the ink storage tube 21 in the natural state. An annular groove 35 is formed at the front end of the fitting tube 34 and adjacent to the flange 33. The width of the groove 35 is about 0.5 to 2.0 mm, and the outer diameter is substantially equal to the inner diameter of the ink storage tube 21 in the natural state.
[0012]
Thus, when the fitting tube portion 34 of the joint 30 is press-fitted into the distal end opening of the synthetic resin ink container 21, the inner diameter of the ink container tube 21 increases in the process, and the surface of the fitting tube portion 34 The synthetic resin is elastically deformed in the direction of the flange 33. Then, the press-fitting is performed until the leading edge of the ink storage tube 21 comes into contact with the flange portion 33, but as shown in FIG. The distal end 21a of the tube 21 is restored to the inner diameter of the natural state and fitted into the groove 35. Therefore, even if the synthetic resin on the surface of the fitting cylinder portion 34 elastically deformed in the direction of the flange portion 33 is spring-bagged in the direction opposite to the flange portion 33, the tip portion 21a of the ink storage tube 21 is fitted into the groove 35. Since it is locked, the ink storage tube 21 does not move in the direction opposite to the flange portion 33. That is, the gap S shown in FIG. 4 is not formed between the flange portion 33 and the leading edge of the ink storage tube 21. Therefore, the total length can be easily controlled and the appearance can be made unsightly.
[0013]
【The invention's effect】
As described above, according to the present invention, the fitting tube portion of the synthetic resin joint in which the fitting tube portion is formed on the tail end side of the flange portion is formed of a synthetic resin ink storage tube filled with ink. In the writing implement refill that is press-fitted into the distal end opening and the pen body is connected to the center hole of the joint, an annular groove is formed at the front end of the fitting tube portion of the joint and adjacent to the flange portion. When the fitting tube portion of the resin joint is press-fitted into the distal end opening of the synthetic resin ink container tube, no gap is formed between the distal end edge of the ink container tube and the flange portion of the joint, and the It is possible to provide a writing instrument refill that is easy to control the entire length and has a good appearance.
[Brief description of the drawings]
FIG. 1 is a sectional view of a ballpoint pen.
FIG. 2 is a sectional view of the joint according to the embodiment of the present invention.
FIG. 3 is an explanatory view of a connection state between a joint and an ink storage tube according to the embodiment of the present invention.
FIG. 4 is an explanatory diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Shaft cylinder 11 Tip opening 13 Tail plug 20 Refill 21 Ink storage tube 23 Ballpoint pen tip 24 Backflow prevention body 25 Piece 26 Ball 30 Joint 31 Taper part 32 Center hole 33 Flange part 34 Fitting cylinder part 35 Groove 40 Cap 41 Seal ball I Ink S Clearance

Claims (1)

鍔部の尾端側に嵌着筒部が形成された合成樹脂製の継手の該嵌着筒部が、インキが充填された合成樹脂製のインキ収容管の先端開口に圧入され、該継手の中心孔にペン体が接続された筆記具用レフィールにおいて、
前記継手の嵌着筒部の前端であって鍔部に隣接する部分に円環状の溝が形成されたことを特徴とする筆記具用レフィール。
The fitting tube portion of the synthetic resin joint having the fitting tube portion formed on the tail end side of the flange portion is press-fitted into the leading end opening of an ink-filled tube made of synthetic resin filled with ink. In a refill for writing instruments with a pen body connected to the center hole,
A refill for a writing instrument, wherein an annular groove is formed at a portion adjacent to a flange portion at a front end of a fitting tube portion of the joint.
JP2002188874A 2002-06-28 2002-06-28 Refill for writing instrument Pending JP2004025761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002188874A JP2004025761A (en) 2002-06-28 2002-06-28 Refill for writing instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002188874A JP2004025761A (en) 2002-06-28 2002-06-28 Refill for writing instrument

Publications (1)

Publication Number Publication Date
JP2004025761A true JP2004025761A (en) 2004-01-29

Family

ID=31183439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002188874A Pending JP2004025761A (en) 2002-06-28 2002-06-28 Refill for writing instrument

Country Status (1)

Country Link
JP (1) JP2004025761A (en)

Similar Documents

Publication Publication Date Title
US5711626A (en) Ball-point pen with back flow stop
JP2004025761A (en) Refill for writing instrument
JP4165748B2 (en) Knock-type ballpoint pen
JP2003154787A (en) Refill out-in mechanism of writing appliance
JP3197423B2 (en) Ballpoint pen
JP3789518B2 (en) Ballpoint pen refill
JP2005280119A (en) Knock type ballpoint pen
JP2008265147A (en) Writing utensil
JP3197422B2 (en) Ballpoint pen
JP3712681B2 (en) Ballpoint pen
JP3698807B2 (en) Ballpoint pen refill
JP4036297B2 (en) Ballpoint pen refill
US5709491A (en) Pencil-like eraser
JP3634039B2 (en) Writing instrument with seal
JP2001171286A (en) Knocking type writing utensil
JP3730584B2 (en) Ballpoint pen
JPH07251593A (en) Refill of ball point pen
JP3791811B2 (en) Ballpoint pen
JP2002065351A (en) Applicator
JP3417046B2 (en) Writing implement
JP2006240219A (en) Ball-point pen refill
JP2004042575A (en) Refill for writing implement
JP3765532B2 (en) Double writing instrument
JP2003237289A (en) Ballpoint pen
JP2003154788A (en) Refill out-in mechanism of writing appliance