JP2016064609A - Retractable ball point pen - Google Patents

Retractable ball point pen Download PDF

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JP2016064609A
JP2016064609A JP2014195872A JP2014195872A JP2016064609A JP 2016064609 A JP2016064609 A JP 2016064609A JP 2014195872 A JP2014195872 A JP 2014195872A JP 2014195872 A JP2014195872 A JP 2014195872A JP 2016064609 A JP2016064609 A JP 2016064609A
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ballpoint pen
pen tip
ball
outer diameter
tip
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洋勝 初谷
Hirokatsu Hatsuya
洋勝 初谷
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Pentel Co Ltd
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Pentel Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a retractable ball point pen which makes a writing tip part of a ball point pen refill retractable from a tip mouth of an outer sheath in which the ball point pen refill is housed.SOLUTION: A resinous ink tank 2 or a resinous relay member for the ink tank is connected to a ball point pen chip 3 of a ball point pen refill so as to cover a connection part of the ball point pen chip from the outer side and, when an outer diameter of the maximum outer diameter part of the ball point pen chip is A, an outer diameter of an overlapped part of a connection part between the ball point pen chip and the ink tank or the relay member is B, a pore diameter in a shaft cylinder 7 in which the maximum outer diameter part of the ball point pen chip in the retracted state of a writing tip part is located is C, and a pore diameter D in the shaft cylinder in which the overlapped part of the connection part in the retracted state of the writing tip part is located is D, a relation of (C-A)>(D-B) and a relation of 1.05≤B/A≤1.25 are satisfied.SELECTED DRAWING: Figure 4

Description

本発明は、ボールペンリフィルが収納される外装体の先口よりボールペンリフィルの筆記先端部を出没可能した出没式ボールペンに関する。   The present invention relates to a retractable ballpoint pen capable of retracting a writing tip portion of a ballpoint pen refill from an end of an exterior body in which the ballpoint pen refill is stored.

従来、外装体またはその一部を金属のような硬質且つ、光沢感のある材料を用い、高級感を演出した出没式ボールペンは、樹脂製の一般的な筆記具よりも重量が重く、誤って落下させた時の衝撃は強くなる傾向にある。その為に、筆記先端部であるボールペンチップを軸筒内に収納した状態で落下させてしまった時にも、軸筒内面とボールペンチップが衝突する衝撃力は非常に大きくなり、ボールペンチップの変形や損傷が生じやすいものであった。それを防止するものとして、特許第5078641号公報には、軸筒の先口近傍内面に軸筒より軟質な材料を配置したものが開示されている。   Conventional retractable ball-point pens that use a hard and glossy material such as metal for the exterior body or part of the exterior body to produce a high-class feel are heavier than ordinary resin writing instruments, and fall accidentally. There is a tendency for the impact to be stronger. For this reason, even if the ballpoint pen tip, which is the writing tip, is dropped in a state of being housed in the shaft cylinder, the impact force that the inner surface of the shaft cylinder collides with the ballpoint pen tip becomes very large, Damage was likely to occur. In order to prevent this, Japanese Patent No. 5078641 discloses a material in which a material softer than the shaft tube is disposed on the inner surface in the vicinity of the tip of the shaft tube.

特許第5078641号公報Japanese Patent No. 5078641

しかしながら、前述した従来の出没式ボールペンは、軸筒内面の先口近傍を軟質にする為に、軸筒とは別の軟質の部品を配置したり、軸筒内面にコーティングを行う必要があり、構造の複雑化や、コストアップに繋がってしまうものであった。また、軸筒内面の先口近傍を軟質にすればボールペンチップと軸筒内面の衝撃力は緩和できるものの、落下等の衝撃はボールペンリフィル全体に及ぶものであり、特にボールペンリフィルのインキタンクが樹脂のような軟質なものだと大きくしなってしまい、その後方のボールペンチップとインキタンクの接続部の重なり部分はしなりによって曲がりの力を受け、接続部の重なり部分の変形や損傷、割れが生じてしまう場合があった。   However, the above-mentioned conventional retractable ballpoint pen needs to arrange a soft part different from the shaft tube or to coat the inner surface of the shaft tube in order to make the vicinity of the tip of the inner surface of the shaft tube soft. This leads to a complicated structure and increased costs. Although the impact force between the ballpoint pen tip and the inner surface of the shaft cylinder can be mitigated by softening the vicinity of the front end of the inner surface of the shaft cylinder, the impact such as dropping falls on the entire ballpoint pen refill. If it is soft, it will become large, and the overlapping part of the connection part of the ballpoint pen tip and the ink tank behind it will receive bending force due to bending, and deformation, damage, cracking of the overlapping part of the connection part will be It might happen.

本発明は、ボールペンリフィルが収納される外装体の先口よりボールペンリフィルの筆記先端部を出没可能した出没式ボールペンにおいて、前記ボールペンリフィルは、筆記部材としてボールを先端より一部突出した状態で回転可能に抱持したボールペンチップと、そのボールペンチップの反ボール側に、樹脂製のインキタンクまたはインキタンクに対する樹脂製の中継部材を、ボールペンチップの接続部分を外側から覆うように接続し、ボールペンチップの最大外径部の外径をA、ボールペンチップと、インキタンクまたは中継部材との接続部の重なり部分の外径をB、筆記先端部の没入状態でのボールペンチップの最大外径部が位置する軸筒内の孔径をC、筆記先端部の没入状態での前記接続部の重なり部分が位置する軸筒内の孔径をD、とした時、(C−A)>(D−B)となる関係、並びに、1.05≦B/A≦1.25となる関係が満たされる出没式ボールペンを要旨とする。   The present invention relates to a retractable ballpoint pen in which a writing tip portion of a ballpoint pen refill can be projected and retracted from a front end of an exterior body in which the ballpoint pen refill is accommodated, and the ballpoint pen refill rotates with a part of the ball protruding from the tip as a writing member. Connect the ballpoint pen tip that you can hold to the opposite side of the ballpoint pen tip to the resin ink tank or the resin relay member to the ink tank so that the connection part of the ballpoint pen tip is covered from the outside. The outer diameter of the maximum outer diameter of the ballpoint pen tip is A, the outer diameter of the overlapping part of the connection between the ballpoint pen tip and the ink tank or relay member is B, and the maximum outer diameter of the ballpoint pen tip is located when the writing tip is immersed C is the hole diameter in the shaft cylinder, and D is the hole diameter in the shaft cylinder where the overlapping portion of the connecting portion is located in the state where the writing tip is immersed. When a was, and (C-A)> (D-B) and the relationship, as well as a retractable ballpoint pen of relation of 1.05 ≦ B / A ≦ 1.25 is satisfied gist.

ボールペンチップの最大外径部の外径をA、ボールペンチップと、インキタンクまたは中継部材との接続部の重なり部分の外径をB、筆記先端部の没入状態でのボールペンチップの最大外径部が位置する軸筒内の孔径をC、筆記先端部の没入状態での前記接続部の重なり部分が位置する軸筒内の孔径をDとした時、(C−A)>(D−B)となる関係、並びに、1.05≦B/A≦1.25の関係を満たす事で、筆記先端部であるボールペンチップが軸筒内に没入した状態において、前記接続部の重なり部分と軸筒内孔との隙間を、ボールペンチップの最大外径部と軸筒内孔との隙間よりも小さくし、落下した時にボールペンチップの最大外径部が軸筒内孔に衝突する前に前記接続部の重なり部分が軸筒内孔と衝突しやすいものにできる。そして、前記接続部の重なり部分の外側は樹脂製のインキタンクまたは中継部材としているので、前記接続部の重なり部分と軸筒内孔が衝突した時の樹脂の弾性によって、ボールペンチップの最大外径部が軸筒内孔に直接衝突する速度を十分に低下させ、衝撃力を小さくした状態で衝突させることで、ボールペンチップ先端部の変形や損傷を防止できると同時に前記接続部の重なり部分と軸筒内孔が衝突した時のボールペンチップの振れを抑制でき、前記接続部の重なり部分の曲がりや変形、割れも防止することもできる。
また、外装体または外装体の一部である軸筒の先口近傍に金属のような硬質な材料を使用しても、その内面に軟質の部品を配置したり、コーティングを行うこと無く、ボールペンリフィルの変形や損傷を防止した、構造が単純で安価な出没式ボールペンを提供することができる。
The outer diameter of the maximum outer diameter portion of the ball-point pen tip is A, the outer diameter of the overlapping portion of the connection portion between the ball-point pen tip and the ink tank or the relay member is B, and the maximum outer diameter portion of the ball-point pen tip when the writing tip is immersed (C−A)> (D−B) where C is the hole diameter in the shaft cylinder in which the position of the writing is located, and D is the hole diameter in the shaft cylinder in which the overlapping portion of the connecting portion is located in the immersive state of the writing tip. And the relationship between 1.05 ≦ B / A ≦ 1.25 and satisfying the relationship of 1.05 ≦ B / A ≦ 1.25, the overlapping portion of the connecting portion and the shaft cylinder in a state where the ballpoint pen tip as the writing tip portion is immersed in the shaft cylinder The gap between the inner hole is made smaller than the gap between the maximum outer diameter part of the ball-point pen tip and the shaft cylinder inner hole, and the connection part before the maximum outer diameter part of the ball-point pen tip collides with the shaft cylinder inner hole when dropped. The overlapping portion can easily collide with the shaft cylinder bore. Since the outside of the overlapping portion of the connecting portion is a resin ink tank or a relay member, the maximum outer diameter of the ball-point pen tip is caused by the elasticity of the resin when the overlapping portion of the connecting portion collides with the shaft cylinder bore. By sufficiently reducing the speed at which the part directly collides with the shaft bore, and making the impact collide with a small impact force, deformation and damage of the tip of the ball-point pen tip can be prevented, and at the same time, the overlapping part of the connecting part and the shaft It is possible to suppress the deflection of the ball-point pen tip when the in-cylinder hole collides, and to prevent bending, deformation, and cracking of the overlapping portion of the connection portion.
Also, even if a hard material such as metal is used in the vicinity of the front end of the outer cylinder or the shaft cylinder that is a part of the outer cylinder, a ballpoint pen can be used without placing soft parts or coating on the inner surface. It is possible to provide a retractable ballpoint pen that has a simple structure and is inexpensive and prevents refill deformation and damage.

ボールペンリフィルを示す縦断面図。The longitudinal cross-sectional view which shows a ball-point pen refill. 図1のI部拡大図。The I section enlarged view of FIG. 出没式ボールペンを示す縦断面図。The longitudinal cross-sectional view which shows a retractable ball-point pen. 図3のII部拡大図。The II section enlarged view of FIG. 部材を示す図4相当図。FIG. 5 is a view corresponding to FIG. 他の実施形態を示す図4相当図FIG. 4 equivalent view showing another embodiment

本発明のボールペンリフィルに使用されるボールペンチップは筆記部材としてのボールと、そのボールを回転可能に抱持するボールホルダーからなる。
ボールは、炭化タングステン、チタン、コバルト、クロム、ニッケル等を主成分とした超硬材や、炭化ケイ素、窒化ケイ素、窒化チタン、アルミナ、ジルコニア等のセラミック、または樹脂製のものを用いることができる。
The ballpoint pen tip used in the ballpoint pen refill of the present invention comprises a ball as a writing member and a ball holder that holds the ball rotatably.
The balls can be made of super hard materials mainly composed of tungsten carbide, titanium, cobalt, chromium, nickel, ceramics such as silicon carbide, silicon nitride, titanium nitride, alumina, zirconia, or resin. .

ボールホルダーはステンレス鋼や真鍮、洋白といった金属製や、ポリオキシメチレンのような、エンジニアリングプラスチックと呼ばれる耐磨耗性の高い合成樹脂が使用できる。
また、金属製のボールホルダーでは、コイル線材を切断し棒状のブランク材を使用するものと、予め貫通孔の有するパイプ材を使用することもできる。更に、ボールホルダーの内部には未使用時にインキのにじみ出しを防止する目的で、ボールを押圧するスプリング等の弾撥部材をボールホルダー内部に配置することも可能であり、前記弾撥部材はボールホルダーの反ボール側の後端開口部を縮径加工したり、インキタンクまたはインキタンクに対する中継部材を接続することで抜け止めとし、ボールホルダー内部に配置することができる。
The ball holder can be made of a metal such as stainless steel, brass, or white, or a synthetic resin with high wear resistance called engineering plastic such as polyoxymethylene.
Moreover, in a metal ball holder, the coil wire can be cut and a rod-shaped blank can be used, and a pipe having a through-hole can be used in advance. Furthermore, in order to prevent the ink from bleeding out when the ball holder is not used, it is possible to arrange a spring or other elastic member such as a spring that presses the ball inside the ball holder. The rear end opening of the holder on the side opposite to the ball can be reduced in diameter, or the ink tank or a relay member for the ink tank can be connected to prevent the holder from being removed, and can be placed inside the ball holder.

そして、ボールペンリフィルは前記ボールペンチップの反ボール側に樹脂製のインキタンクまたはインキタンクに対する中継部材が接続されたものである。インキタンクまたは中継部材の材料としては、主に合成樹脂が使用される。例として、ポリプロピレン樹脂、ポリエチレン樹脂、ポリ塩化ビニル樹脂、メタクリル樹脂、ポリアミド樹脂、ポリカーボネート樹脂、ポリスチレン樹脂、アクリロニトリルブタジエンスチレン樹脂等が挙げられるが、軸筒内面に衝突した時に十分に弾性を働かせる為に変形しやすい樹脂を使用する事が望ましく、例としてポリプロピレン樹脂、ポリエチレン樹脂、ポリスチレン樹脂、アクリロニトリルブタジエンスチレン樹脂が望ましい。また、インキ溶剤の非透過性や、内面視認のための透明性、耐溶剤性の観点からは、ポリプロピレン樹脂、ポリアミド樹脂、ポリ塩化ビニル樹脂、ポリエチレン樹脂が主に使用される   The ballpoint pen refill is formed by connecting a resin ink tank or a relay member for the ink tank to the opposite side of the ballpoint pen tip. As a material for the ink tank or the relay member, synthetic resin is mainly used. Examples include polypropylene resin, polyethylene resin, polyvinyl chloride resin, methacrylic resin, polyamide resin, polycarbonate resin, polystyrene resin, acrylonitrile butadiene styrene resin, etc., in order to exert sufficient elasticity when colliding with the inner surface of the shaft cylinder. It is desirable to use a resin that easily deforms. For example, a polypropylene resin, a polyethylene resin, a polystyrene resin, and an acrylonitrile butadiene styrene resin are desirable. Also, from the viewpoints of ink solvent impermeability, transparency for visual recognition of the inner surface, and solvent resistance, polypropylene resin, polyamide resin, polyvinyl chloride resin, and polyethylene resin are mainly used.

ボールペンチップとインキタンクまたはインキタンクに対する中継部材の接続方法としては、インキタンクまたは中継部材のボールペンチップを接続する側の口径をボールペンチップの反ボール側の外径よりも小さく成形したものに、前記ボールペンチップの反ボール側を圧入させ、ボールペンチップの反ボール側の外側を覆うように接続する。
そして、接続することによって形成されるボールペンチップとインキタンクまたは中継部材の接続部の重なり部分の径をBとした時、ボールペンチップの最大外径部の外径Aとは、1.05≦B/A≦1.25の関係を満たすものにする。他の接続方法としては、ボールペンチップとインキタンクまたは中継部材にネジを形成し、ネジによる螺着や、接着剤による接着、熱や超音波を掛ける事によってインキタンクまたは中継部材を溶融させ接着させる方法もあるが、その接続方法は特に限定するものではない。
As a method of connecting the ballpoint pen tip and the ink tank or the relay member to the ink tank, the diameter of the ink tank or the relay member on the side where the ballpoint tip is connected is formed smaller than the outer diameter of the ballpoint tip opposite to the ball side, The ball pen tip is press-fitted on the side opposite to the ball and the ball pen tip is connected so as to cover the outer side on the side opposite to the ball.
When the diameter of the overlapping portion of the connecting portion of the ballpoint pen tip and the ink tank or relay member formed by the connection is B, the outer diameter A of the maximum outer diameter portion of the ballpoint pen tip is 1.05 ≦ B The relationship of /A≦1.25 is satisfied. As another connection method, a screw is formed on the ballpoint pen tip and the ink tank or the relay member, and the ink tank or the relay member is melted and bonded by screwing with screws, bonding with an adhesive, or applying heat or ultrasonic waves. There is a method, but the connection method is not particularly limited.

そして、上記の形態で作製されたボールペンリフィルが収納される軸筒内部には、ボールペンリフィルの先端部であるボールペンチップの最大外径部及びボールペンチップとインキタンクまたはインキタンクに対する中継部材の接続部の重なり部分を収納する孔が形成されている。前記孔は、軸筒が金属製の材料の時、主にドリルによる切削加工にて形成され、筆記時にボールペンリフィルを出没させる時の抵抗や引っ掛かりを考慮すると、連続した一つの孔であることが望ましいが、切削加工時のドリルの耐久性を向上させたい場合には、径が異なる複数個の孔で形成されていても構わない。また、軸筒が樹脂製の場合には成型にて形成されたものでも構わないし、成型体を切削加工して形成しても構わない。軸筒の材質として、金属の場合、ステンレス鋼や真鍮、洋白、アルミニウムといった一般的な金属材料が使用でき、樹脂の場合、ポリプロピレン樹脂、ポリエチレン樹脂、ポリ塩化ビニル樹脂、メタクリル樹脂、ポリアミド樹脂、ポリカーボネート樹脂、ポリスチレン樹脂、アクリロニトリルブタジエンスチレン樹脂等といった合成樹脂が使用できる。また、これらの材質に塗装やめっきを行うことも適宜可能である。   And inside the shaft cylinder in which the ballpoint pen refill produced in the above form is accommodated, the maximum outer diameter portion of the ballpoint pen tip which is the tip of the ballpoint pen refill and the connection portion of the ballpoint pen tip and the ink tank or the relay member to the ink tank A hole for accommodating the overlapping portion is formed. When the shaft cylinder is made of a metal material, the hole is formed mainly by cutting with a drill, and in consideration of resistance and catch when the ballpoint pen refill is raised and lowered during writing, the hole may be one continuous hole. Although it is desirable, when it is desired to improve the durability of the drill during cutting, it may be formed by a plurality of holes having different diameters. Further, when the shaft cylinder is made of resin, it may be formed by molding, or may be formed by cutting a molded body. As the material of the shaft cylinder, in the case of metal, general metal materials such as stainless steel, brass, white and aluminum can be used. In the case of resin, polypropylene resin, polyethylene resin, polyvinyl chloride resin, methacrylic resin, polyamide resin, Synthetic resins such as polycarbonate resin, polystyrene resin, acrylonitrile butadiene styrene resin and the like can be used. It is also possible to apply coating or plating to these materials as appropriate.

そして、筆記先端部の没入状態でのボールペンチップの最大外径部が位置する軸筒内の孔径をCとすると、ボールペンチップの最大外径部と軸筒内面との隙間はC−Aで示され、筆記先端部の没入状態でのボールペンチップとインキタンクまたは中継部材の接続部の重なり部分が位置する軸筒内の孔径をDとすると、前記接続部の重なり部分と軸筒内面との隙間はD−Bで示され、(C−A)>(D−B)の関係を満たすものにする。この関係を満たす事によって、軸筒内面とボールペンチップの最大外径部との隙間より前記接続部との重なり部分の隙間の方が小さく形成されるので、ボールペンリフィルが軸筒内面に衝突する時には、ボールペンチップよりも先に前記接続部の重なり部分を衝突させやすくできるものである。   When the hole diameter in the shaft cylinder where the maximum outer diameter portion of the ballpoint pen tip is located in the state where the writing tip portion is immersed is C, the gap between the maximum outer diameter portion of the ballpoint pen tip and the inner surface of the shaft cylinder is indicated by C-A. When the hole diameter in the shaft cylinder in which the overlapping part of the connection part of the ballpoint pen tip and the ink tank or the relay member is located in the immersion state of the writing tip part is D, the clearance between the overlapping part of the connection part and the inner surface of the shaft cylinder Is represented by DB and satisfies the relationship of (C−A)> (D−B). By satisfying this relationship, the gap between the connecting portion and the connecting portion is smaller than the gap between the inner surface of the shaft cylinder and the maximum outer diameter portion of the ballpoint pen tip. The overlapping portion of the connecting portion can be easily collided before the ballpoint pen tip.

以下、本発明の一例を図面に示し説明する。図1は外装体に収納するボールペンリフィルの縦断面図を示す。
ボールペンリフィル1はインキタンク2にボールペンチップ3が接続されており、インキタンク2内には、インキ4が収容されている。インキ4としては、筆跡・塗布跡を形成するものであり水を主媒体とする所謂水性インキ、有機溶剤を主媒体とする所謂油性インキのいずれをも使用することができる。
そして、インキ4の後方には、インキ4の消費に伴うインキ界面の移動に追従し、インキ4の乾燥や、インキタンク2の後方開放側へのインキ4の移動や漏れ出し、インキタンク2壁面にインキ4が付着して筆跡に供されなくなることなどを防止する為にインキ4と相溶しない高粘度流体である逆流防止体組成物5が配置されている。
また、図示はしないがインキタンク2の内径が大きい場合には壁面より遠い部分における逆流防止機能が低下するので、合成樹脂の成型品である浮子を逆流防止体組成物5内に浮遊状態となるように配置してこれを補強することも出来る。
Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a ballpoint pen refill stored in an exterior body.
The ballpoint pen refill 1 has a ballpoint pen tip 3 connected to an ink tank 2, and ink 4 is accommodated in the ink tank 2. As the ink 4, a so-called water-based ink that forms a handwriting or a coating mark and that uses water as a main medium, or a so-called oil-based ink that uses an organic solvent as a main medium can be used.
The ink 4 follows the movement of the ink interface as the ink 4 is consumed behind the ink 4, dries the ink 4, moves and leaks the ink 4 to the rear open side of the ink tank 2, and the wall surface of the ink tank 2. In order to prevent the ink 4 from adhering to the ink and being no longer used for the handwriting, a backflow preventing body composition 5 which is a high-viscosity fluid incompatible with the ink 4 is disposed.
Although not shown, when the inner diameter of the ink tank 2 is large, the backflow prevention function at a portion far from the wall surface is lowered, so that the float, which is a synthetic resin molded product, floats in the backflow prevention body composition 5. It can also be arranged to reinforce this.

図2は図1のI部拡大図を示す。
ボールペンチップ3の反ボール側である後端部はボールペンチップ3の最大外径部の径Aよりも小径に形成され、その部分がインキタンク2との接続部になる。
インキタンク2のボールペンチップ3の接続口の内径は、前記ボールペンチップ3の後端部よりも小径に形成されており、その接続口にボールペンチップ3の後端部を圧入することで、樹脂製のインキタンク2がボールペンチップ3の外周を覆った接続部である重なり部6を形成する。そして、前記重なり部6の外径をBとする。Bの寸法はインキタンク2のボールペンチップ3の接続口の外径や肉厚、または、ボールペンチップ3の接続部の外径を調整する事で適宜調整可能なものであるが、インキタンク2のボールペンチップ3の接続口の肉厚が薄いと圧入した時に十分な接続強度が得られなくなる為、0.2mm以上であることが望ましく、また、前記インキタンク2の接続口の内径がボールペンチップ3の後端接続部外径に対して小さ過ぎると圧入した時に割れや変形が生じ、大き過ぎると十分な接続強度が得られないことから、前記インキタンク2の接続口の内径はボールペンチップ3の後端接続部外径の75%〜95%で形成しておくことが望ましい。
そして、ボールペンチップ3の最大外径部の径Aと、前記重なり部6の外径Bは、1.05≦B/A≦1.25の関係を満たすものとする。
FIG. 2 is an enlarged view of a portion I in FIG.
The rear end portion of the ball-point pen tip 3 on the side opposite to the ball is formed with a diameter smaller than the diameter A of the maximum outer diameter portion of the ball-point pen tip 3, and that portion becomes a connection portion with the ink tank 2.
The inner diameter of the connection port of the ballpoint pen tip 3 of the ink tank 2 is smaller than the rear end portion of the ballpoint pen tip 3, and the rear end portion of the ballpoint pen tip 3 is press-fitted into the connection port, so The ink tank 2 forms an overlapping portion 6 which is a connection portion covering the outer periphery of the ballpoint pen tip 3. The outer diameter of the overlapping portion 6 is B. The dimension B can be adjusted as appropriate by adjusting the outer diameter and thickness of the connection port of the ballpoint pen tip 3 of the ink tank 2 or the outer diameter of the connection portion of the ballpoint pen tip 3. If the thickness of the connection port of the ball-point pen tip 3 is thin, sufficient connection strength cannot be obtained when it is press-fitted. Therefore, the inner diameter of the connection port of the ink tank 2 is preferably 0.2 mm or more. If it is too small with respect to the outer diameter of the rear end connection part, cracking or deformation occurs when it is press-fitted, and if it is too large, sufficient connection strength cannot be obtained. It is desirable to form it at 75% to 95% of the rear end connecting portion outer diameter.
The diameter A of the maximum outer diameter portion of the ballpoint pen tip 3 and the outer diameter B of the overlapping portion 6 satisfy the relationship of 1.05 ≦ B / A ≦ 1.25.

そして、図3には前述したボールペンリフィル1を収納し、没入状態である出没式ボールペンの縦断面図を示す。
本例の出没式ボールペンの外装体は、ボールペンチップ3が出没する開口部を有する軸筒7と、前記軸筒7が接続された後軸8で構成され、前記後軸8内にはノック部材9と、回転子10が配置されており、ボールペンリフィル1は軸筒7内部に配置されたコイルスプリング11の反発力によって後端が回転子10と当接するように収納されている。そして、ノック部材9を押圧することで回転子10と共に前後移動し、ボールペンチップ3を軸筒7の開口部より出没可能としたノック式といわれる出没式ボールペンを成している。
その他の出没機構の例としては、外装体を前軸部と後軸部に分け、一方を回転させる事によって軸内部に形成されたカムの傾斜を利用してボールペンリフィル1を出没させる回転繰り出し式や、ボールペンリフィル1にスライド片を装着し、前記スライド片に形成した***部を外装体に形成した摺動溝より外側に突出させて、前記***部を押圧することでスライド片を前進させ、ボールペンレフィル1を出没させるスライド式を用いる事ができるが、それら出没機構は特に限定するものでは無い。
FIG. 3 is a longitudinal sectional view of the retractable ballpoint pen that houses the above-described ballpoint pen refill 1 and is in an immersive state.
The exterior body of the retractable ballpoint pen of this example is composed of a shaft cylinder 7 having an opening through which the ballpoint pen tip 3 protrudes and retracted, and a rear shaft 8 to which the shaft tube 7 is connected. 9 and the rotor 10 are disposed, and the ball-point pen refill 1 is accommodated so that the rear end thereof is in contact with the rotor 10 by the repulsive force of the coil spring 11 disposed in the shaft cylinder 7. Then, when the knock member 9 is pressed, it moves back and forth together with the rotor 10 to form a retractable ballpoint pen that is called a knock type that allows the ballpoint pen tip 3 to protrude from the opening of the shaft cylinder 7.
As another example of the retracting mechanism, the outer body is divided into a front shaft portion and a rear shaft portion, and by rotating one of them, the rotation of the ball-point pen refill 1 is retracted using the inclination of the cam formed inside the shaft. Or, a slide piece is attached to the ballpoint pen refill 1, the raised portion formed on the slide piece is projected outward from the sliding groove formed on the exterior body, and the slide piece is advanced by pressing the raised portion, A slide type that causes the ballpoint pen refill 1 to appear and disappear can be used, but the appearance and appearance mechanism thereof is not particularly limited.

図4には図3のII部拡大図を示す。また、説明をわかりやすくする為に図4のボールペンリフィル1を除いた図を図5に示す。
軸筒7の内部にはボールペンチップ3の最大外径部と、インキタンク2とボールペンチップ3の接続部の重なり部6に位置する部分に孔12が形成されている。
本例において、孔12は2つの径のドリルによる切削加工で形成されており、ボールペンチップ3の最大外径部に位置する孔12aと、前記重なり部分6に位置する孔12bの2つの孔で構成されている。そして、図5に示すように、孔12aの孔径をC、孔12bの孔径をDとし、ボールペンチップ3の最大外径部の径Aと、前記重なり部6の外径Bとは、(C−A)>(D−B)の関係を満たすものにするが、孔径Cがボールペンチップ3の最大外径部の径Aに対して、及び孔径Dが前記重なり部6の外径Bに対して大きすぎると、没入時のボールペンリフィル1は軸筒7の開口部の中心から大きく離れた位置に収納される事になり、出没させる時に大きな抵抗が生じてしまい、また、小さ過ぎるとボールペンを組み立てる時に、ボールペンリフィル1を孔12に入れ難く、組立ての時に軸筒7にボールペンチップ3を衝突させて傷つけてしまう可能性が高くなってしまう為、孔径Cはボールペンチップ3の最大外径部の径Aに対して101%〜130%程度であることが望ましく、同様に孔径Dも前記重なり部6の外径Bに対して101%〜130%程度が望ましい。更に、前記重なり部6に位置する孔12bの長さは短いと、軸筒7内面と衝突する面積が小さくなり、衝撃力が集中することによって衝撃を繰り返し受けると変形や損傷してしまい、弾性の性能が働きにくくなる可能性がある為、孔12bの長さは前記重なり部6の長さの10%以上に被るように形成することが望ましい。また、ボールペンチップ3の最大外径部が位置する孔12aが更に異なる径による複数個の孔で形成されている場合は、ボールペンチップ3の最大外径部との隙間が最も小さくなる部分、つまり、最も小さい孔径をCとする。これは前記重なり部分6が位置する孔12bの孔径Dにも同様の事が言える。そして、孔12のボールペンチップ3が出没する開口部には先端孔13が形成されている。前記先端孔13はボールペンチップ3を出没させている時にはボールペンチップ3の最大外径部に位置し、ボールペンチップ3のがたつきを抑制する目的がある為、先端孔13の孔径はボールペンチップ3の最大外径部の径Aと略同一である事が望ましいが、特に必要なければ形成しなくても構わない。
FIG. 4 shows an enlarged view of part II of FIG. For the sake of easy understanding, FIG. 5 shows a diagram excluding the ballpoint pen refill 1 of FIG.
Inside the shaft cylinder 7, a hole 12 is formed in a portion located in a maximum outer diameter portion of the ballpoint pen tip 3 and an overlapping portion 6 of a connection portion of the ink tank 2 and the ballpoint pen tip 3.
In this example, the hole 12 is formed by cutting with a drill having two diameters. The hole 12a is located at the maximum outer diameter portion of the ball-point pen tip 3 and the hole 12b is located at the overlapping portion 6. It is configured. As shown in FIG. 5, the hole diameter of the hole 12a is C, the hole diameter of the hole 12b is D, and the diameter A of the maximum outer diameter portion of the ballpoint pen tip 3 and the outer diameter B of the overlapping portion 6 are (C -A)> (D-B), but the hole diameter C is relative to the diameter A of the maximum outer diameter portion of the ball-point pen tip 3 and the hole diameter D is relative to the outer diameter B of the overlapping portion 6. If it is too large, the ballpoint pen refill 1 at the time of immersion will be stored in a position far away from the center of the opening of the barrel 7 and a large resistance will be generated when it is retracted, and if it is too small, The hole diameter C is the maximum outer diameter portion of the ball-point pen tip 3 because it is difficult to put the ball-point refill 1 into the hole 12 when assembling, and the ball pen tip 3 is likely to be damaged by colliding with the shaft cylinder 7 during assembling. 101 for diameter A Desirably about 130%, similarly hole diameter D is also about 101% to 130% with respect to the outer diameter B of the overlapping portion 6 is desirable. Further, if the length of the hole 12b located in the overlap portion 6 is short, the area that collides with the inner surface of the shaft tube 7 becomes small, and if the impact force is concentrated, it is deformed or damaged when subjected to repeated impacts, and is elastic. Therefore, it is desirable that the length of the hole 12b is formed so as to cover 10% or more of the length of the overlapping portion 6. Further, when the hole 12a in which the maximum outer diameter portion of the ball-point pen tip 3 is located is formed by a plurality of holes having different diameters, a portion where the gap with the maximum outer diameter portion of the ball-point pen tip 3 is the smallest, that is, , C is the smallest hole diameter. The same applies to the hole diameter D of the hole 12b where the overlapping portion 6 is located. A tip hole 13 is formed in the opening of the hole 12 where the ball-point pen tip 3 appears and disappears. The tip hole 13 is positioned at the maximum outer diameter portion of the ball-point pen tip 3 when the ball-point pen tip 3 is projected and retracted, and has the purpose of suppressing rattling of the ball-point pen tip 3. Although it is desirable that the diameter is substantially the same as the diameter A of the maximum outer diameter portion, it may not be formed unless particularly required.

図6には他の実施形態の図4相当図を示す。
図6は図4におけるボールペンチップ3の最大外径部に位置する孔12aと、ボールペンチップ3とインキタンク7の接続部の重なり部6に位置する孔12bが連続した一つの孔で形成されて、同一径(C=D)となっているものである。このような形状にすることによって、ボールペンチップ3を先端孔13より出没させる時に、孔12を異なる径で複数個形成した時にできる段差にボールペンリフィル1が引っ掛かったりする事なく、円滑にボールペンリフィル1を出没させる事が可能となる。
FIG. 6 shows a diagram corresponding to FIG. 4 of another embodiment.
FIG. 6 shows that a hole 12a located at the maximum outer diameter portion of the ball-point pen tip 3 in FIG. 4 and a hole 12b located at the overlapping portion 6 of the connecting portion between the ball-point pen tip 3 and the ink tank 7 are formed as one continuous hole. , Have the same diameter (C = D). By adopting such a shape, when the ball-point pen tip 3 is projected and retracted from the tip hole 13, the ball-point refill 1 can be smoothly smoothed without causing the ball-point refill 1 to be caught in a step formed when a plurality of holes 12 are formed with different diameters. Can be infested.

上述した各例に基づき、ボールペンチップ3の最大外径部の径A、ボールペンチップ3とインキタンク2の接続部の重なり部分6の外径B、筆記先端部の没入状態でのボールペンチップ3の最大外径部が位置する軸筒内の孔12aの径をC、筆記先端部の没入状態での前記接続部の重なり部分6が位置する軸筒内の孔12bの径をDを、様々な寸法になるように実施例及び比較例を作製し、以下の試験を実施した。尚、実施例1、2、及び比較例1〜5、8は図4のように軸筒7内は異なる径の2つの孔を形成したものを用い、実施例3〜6、及び比較例6、7、9、10は図6のように軸筒7内は一つの連続した孔を形成したものを用いた。
また、試験に使用したボールペンリフィル1はステンレス製のボールホルダーに0.7mmの超硬製のボールを抱持したボールペンチップ3に、ポリプロピレン樹脂製のインキタンク2を接続し、内部には油性インキを充填したものを使用した。また、軸筒7は真鍮を切削加工にて作製し、外装体(ぺんてる株式会社製、ランスロット2シリーズ油性ボールペン、製品符号LCB20A)の軸筒部分を交換し使用した。各実施例及び比較例の寸法と試験結果を表1に示す。
Based on each example described above, the diameter A of the maximum outer diameter portion of the ball-point pen tip 3, the outer diameter B of the overlapping portion 6 of the connection portion between the ball-point pen tip 3 and the ink tank 2, and the ball-point pen tip 3 in the state where the writing tip portion is immersed. The diameter of the hole 12a in the shaft cylinder in which the maximum outer diameter portion is located is C, and the diameter of the hole 12b in the shaft cylinder in which the overlapping portion 6 of the connecting portion in the state where the writing tip portion is immersed is variously changed. Examples and Comparative Examples were prepared so as to have dimensions, and the following tests were performed. In Examples 1 and 2 and Comparative Examples 1 to 5 and 8, the shaft cylinder 7 is formed with two holes having different diameters as shown in FIG. 4, and Examples 3 to 6 and Comparative Example 6 are used. 7, 9, and 10 were used in which a single continuous hole was formed in the shaft cylinder 7 as shown in FIG. 6.
In addition, the ballpoint refill 1 used for the test was connected to a ballpoint pen tip 3 in which a 0.7 mm superhard ball was held in a stainless steel ball holder with a polypropylene resin ink tank 2 and oil-based ink inside. The one filled with was used. The shaft cylinder 7 was made of brass by cutting, and the shaft cylinder portion of the exterior body (Pentel Co., Ltd., Lancelot 2 series oil ballpoint pen, product code LCB20A) was replaced and used. Table 1 shows the dimensions and test results of the examples and comparative examples.

(落下試験)
作製した出没式ボールペンを、ボールペンリフィルが没入した状態にて、ボールペン本体を横向きの状態からコンクリートの上に高さ1mの自然落下を行い、筆跡及び外観に異常が生じるまでの落下回数を確認した。尚、落下回数の上限は10回までとし、10回落下させて異常が発生しなかったサンプルには「異常無し」と記し、異常が発生した場合はその状態を記した。また、本試験では9回以上の落下で問題が生じなかったサンプルを合格としている。
(Drop test)
With the ballpoint pen refill immersed in the retractable ballpoint pen, the ballpoint pen body was dropped from a horizontal position onto the concrete at a height of 1 m, and the number of drops until the handwriting and appearance were abnormal was confirmed. . The upper limit of the number of drops was set to 10 times, and “no abnormality” was marked for samples that had dropped 10 times and no abnormality occurred, and the state of any abnormality was noted. Moreover, in this test, the sample which did not produce a problem by dropping 9 times or more is regarded as acceptable.

Figure 2016064609
Figure 2016064609

上記結果より、(C−A)>(D−B)となる関係、並びに、1.05≦B/A≦1.25の関係を満たした実施例1〜6においては、10回落下させても異常無し、もしくは10回目で軽微な異常が生じるもので、実際の使用においての落下衝撃には十分な性能を有した良好な出没式ボールペンが得られた。
実施例1、3はボールペンチップの最大外径と、ボールペンチップとインキタンクの接続部の重なり部の外径を同じにした実施例4よりも、軸筒内のボールペンの最大外径部に位置する孔と前記重なり部に位置する孔をより小さく形成したもので、それによってボールペンチップ、及び前記重なり部の軸筒内での移動範囲が小さくなり、落下時に軸筒内面の一方に衝突し、その反動によってもう一方の面に衝突する時の衝突速度の上昇を抑えることで実施例4よりも良好な結果が得られている。
また、実施例2、6は他の実施例とは異なる最大外径のボールペンチップを使用したものであるが、それに合わせて(C−A)>(D−B)、及び1.05≦B/A≦1.25の関係を満たす孔を軸筒内に形成することで、落下衝撃に対して十分な性能を持つものが得られた。
From the above results, in Examples 1 to 6 satisfying the relationship of (C−A)> (D−B) and the relationship of 1.05 ≦ B / A ≦ 1.25, it was dropped 10 times. There was no abnormality or slight abnormality occurred at the 10th time, and a good pendant ballpoint pen having sufficient performance for a drop impact in actual use was obtained.
The first and third embodiments are located at the maximum outer diameter portion of the ballpoint pen in the shaft cylinder, as compared with the fourth embodiment in which the maximum outer diameter of the ballpoint pen tip and the outer diameter of the overlapping portion of the connection portion between the ballpoint pen tip and the ink tank are the same. The hole located in the overlapping portion and the hole located in the overlapping portion are formed smaller, thereby reducing the movement range of the ballpoint pen tip and the overlapping portion in the shaft tube, and colliding with one of the inner surfaces of the shaft tube when falling, By suppressing the increase in the collision speed when colliding with the other surface by the reaction, a better result than that of Example 4 is obtained.
In Examples 2 and 6, a ballpoint pen tip having a maximum outer diameter different from those in the other examples is used, and accordingly, (C−A)> (D−B) and 1.05 ≦ B By forming a hole satisfying the relationship of /A≦1.25 in the shaft tube, a material having sufficient performance against a drop impact was obtained.

比較例1〜6は(C−A)<(D−B)もしくは(C−A)=(D−B)の関係になっており、前記重なり部よりも先にボールペンチップが軸筒内面に衝突しやすくなっている。更に、その中の比較例1はボールペンチップの最大外径部と軸筒内面の距離が大きく、衝撃力が大きくなる傾向にあり、1回の落下でボールが抜けてしまう他の比較例より劣る結果になっている。
また、比較例7、8は(C−A)>(D−B)の関係を満たし、ボールペンチップよりも先に前記重なり部が軸筒内面に衝突しやすくなっているが、B/Aが1.05よりも小さいので、前記重なり部の外径がボールペンチップの最大外径部に対して十分な大きさが無く、先に前記重なり部が軸筒内面に衝突しても衝突速度を十分に低下させる前にボールペンチップが衝突してしまう為、ボールペンチップの変形に繋がってしまっている。
比較例9、10も(C−A)>(D−B)の関係を満たし、ボールペンチップよりも先に前記重なり部が軸筒内面に衝突しやすくなっているが、B/Aが1.25よりも大きいので、前記重なり部の外径がボールペンチップの最大外径部に対して大き過ぎて、前記重なり部が軸筒内面に衝突した時にボールペンチップが大きく振られてしまい、ボールペンチップとインキタンクの接続部の損傷に繋がってしまっている。
Comparative Examples 1 to 6 have a relationship of (C−A) <(D−B) or (C−A) = (D−B), and the ballpoint pen tip is placed on the inner surface of the shaft cylinder before the overlapping portion. It is easy to collide. Further, Comparative Example 1 among them has a large distance between the maximum outer diameter portion of the ball-point pen tip and the inner surface of the shaft cylinder, and tends to have a large impact force, which is inferior to other Comparative Examples in which the ball comes out by one drop. It is the result.
Further, Comparative Examples 7 and 8 satisfy the relationship of (C−A)> (D−B), and the overlapping portion tends to collide with the inner surface of the shaft cylinder before the ballpoint pen tip. Since it is smaller than 1.05, the outer diameter of the overlapping portion is not sufficiently large with respect to the maximum outer diameter portion of the ball-point pen tip, and the collision speed is sufficient even if the overlapping portion collides with the inner surface of the shaft cylinder first. Since the ball-point pen tip collides before it is lowered, it leads to deformation of the ball-point pen tip.
Comparative Examples 9 and 10 also satisfy the relationship of (C−A)> (D−B), and the overlapping portion tends to collide with the inner surface of the shaft cylinder before the ballpoint pen tip. Since the outer diameter of the overlapping portion is too large with respect to the maximum outer diameter portion of the ballpoint pen tip, the ballpoint pen tip is shaken greatly when the overlapping portion collides with the inner surface of the shaft cylinder. The ink tank connection has been damaged.

1 ボールペンリフィル
2 インキタンク
3 ボールペンチップ
4 インキ
5 逆流防止体組成物
6 ボールペンチップとインキタンクの接続部の重なり部
7 軸筒
8 後軸
9 ノック部材
10 回転子
11 コイルスプリング
12 孔
12a ボールペンチップの最大外径部に位置する孔
12b ボールペンチップとインキタンクの接続部の重なり部に位置する孔
13 先端孔
DESCRIPTION OF SYMBOLS 1 Ball-point pen refill 2 Ink tank 3 Ball-point pen tip 4 Ink 5 Backflow prevention body composition 6 The overlapping part of the connection part of a ball-point pen tip and an ink tank 7 Axle cylinder 8 Rear shaft 9 Knock member 10 Rotor 11 Coil spring 12 Hole 12a Ball-point pen tip Hole located at the maximum outer diameter part 12b Hole located at the overlapping part of the connection part of the ballpoint pen tip and the ink tank 13 Tip hole

Claims (1)

ボールペンリフィルが収納される外装体の先口よりボールペンリフィルの筆記先端部を出没可能した出没式ボールペンにおいて、前記ボールペンリフィルは、筆記部材としてボールを先端より一部突出した状態で回転可能に抱持したボールペンチップと、そのボールペンチップの反ボール側に、樹脂製のインキタンクまたはインキタンクに対する樹脂製の中継部材を、ボールペンチップの接続部分を外側から覆うように接続し、ボールペンチップの最大外径部の外径をA、ボールペンチップと、インキタンクまたは中継部材との接続部の重なり部分の外径をB、筆記先端部の没入状態でのボールペンチップの最大外径部が位置する軸筒内の孔径をC、筆記先端部の没入状態での前記接続部の重なり部分が位置する軸筒内の孔径をD、とした時、(C−A)>(D−B)となる関係、並びに、1.05≦B/A≦1.25となる関係が満たされる出没式ボールペン In the retractable ballpoint pen in which the writing tip of the ballpoint pen refill can be projected and retracted from the front end of the exterior body in which the ballpoint refill is stored, the ballpoint pen refill holds the ball as a writing member in a state where the ball partially protrudes from the tip. The ballpoint pen tip and the ballpoint pen tip opposite to the ballpoint pen tip are connected to a resin ink tank or a resin relay member to the ink tank so as to cover the connection part of the ballpoint pen tip from the outside. The outer diameter of the part is A, the outer diameter of the overlapping part of the connection part between the ballpoint pen tip and the ink tank or the relay member is B, and the inside of the shaft cylinder where the largest outer diameter part of the ballpoint pen tip is located when the writing tip is immersed When the hole diameter in the shaft cylinder in which the overlapping part of the connecting part in the state where the writing tip part is immersed is C is D, (C-A)> (D-B) and the relationship, as well as, retractable ballpoint pen relation of 1.05 ≦ B / A ≦ 1.25 is satisfied
JP2014195872A 2014-09-25 2014-09-25 Retractable ball point pen Pending JP2016064609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014195872A JP2016064609A (en) 2014-09-25 2014-09-25 Retractable ball point pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014195872A JP2016064609A (en) 2014-09-25 2014-09-25 Retractable ball point pen

Publications (1)

Publication Number Publication Date
JP2016064609A true JP2016064609A (en) 2016-04-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014195872A Pending JP2016064609A (en) 2014-09-25 2014-09-25 Retractable ball point pen

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019126950A (en) * 2018-01-23 2019-08-01 三菱鉛筆株式会社 Thermochromic writing instrument
WO2020044737A1 (en) * 2018-08-29 2020-03-05 三菱鉛筆株式会社 Writing tool provided with refill

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019126950A (en) * 2018-01-23 2019-08-01 三菱鉛筆株式会社 Thermochromic writing instrument
WO2020044737A1 (en) * 2018-08-29 2020-03-05 三菱鉛筆株式会社 Writing tool provided with refill
JPWO2020044737A1 (en) * 2018-08-29 2021-08-10 三菱鉛筆株式会社 Stationery with refill
US11654711B2 (en) 2018-08-29 2023-05-23 Mitsubishi Pencil Company, Limited Writing tool provided with refill
JP7336446B2 (en) 2018-08-29 2023-08-31 三菱鉛筆株式会社 Writing instrument with refill
TWI813711B (en) * 2018-08-29 2023-09-01 日商三菱鉛筆股份有限公司 Writing implements with refills

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