JP2015202585A - Writing utensil - Google Patents

Writing utensil Download PDF

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Publication number
JP2015202585A
JP2015202585A JP2014081724A JP2014081724A JP2015202585A JP 2015202585 A JP2015202585 A JP 2015202585A JP 2014081724 A JP2014081724 A JP 2014081724A JP 2014081724 A JP2014081724 A JP 2014081724A JP 2015202585 A JP2015202585 A JP 2015202585A
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Japan
Prior art keywords
shaft
front shaft
ink tank
protrusion
tip
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Granted
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JP2014081724A
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JP6320830B2 (en
Inventor
剛生 福本
Takeo Fukumoto
剛生 福本
中島 徹
Toru Nakajima
徹 中島
古川 和彦
Kazuhiko Furukawa
和彦 古川
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Mitsubishi Pencil Co Ltd
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Mitsubishi Pencil Co Ltd
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Application filed by Mitsubishi Pencil Co Ltd filed Critical Mitsubishi Pencil Co Ltd
Priority to JP2014081724A priority Critical patent/JP6320830B2/en
Priority to US15/302,409 priority patent/US9889701B2/en
Priority to EP15777299.7A priority patent/EP3130476B1/en
Priority to TW104111446A priority patent/TWI649219B/en
Priority to PCT/JP2015/061093 priority patent/WO2015156352A1/en
Priority to CN201580017797.9A priority patent/CN106132724B/en
Publication of JP2015202585A publication Critical patent/JP2015202585A/en
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Publication of JP6320830B2 publication Critical patent/JP6320830B2/en
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Abstract

PROBLEM TO BE SOLVED: To provide a writing utensil whose barrel can be securely fastened by being fastened with three members of a front shaft, a rear shaft and an ink tank.SOLUTION: The writing utensil comprises a barrel formed of an assembled front and rear shaft and an ink tank to be stored in the barrel. In the front barrel is formed a protrusion inside the front shaft, and between a rear end of the front shaft and the ink tank is formed a space by the height of the protrusion inside the front shaft, and a rear end of the front shaft is formed so as to be pressed by the rear shaft, with the protrusion inside the front shaft as a supporting point.

Description

本発明は、内部にインクタンクを有する筆記具に関するものである。   The present invention relates to a writing instrument having an ink tank inside.

従来、ボールペンチップやフェルトチップ等の筆記先端を有し、内部に比較的流動性の高いインクを収容する筆記具が提供されている。
また、このような筆記具の外部構造である軸筒は、軸筒の先端側の部材である先軸と、先軸の後端に固定される部材である後軸とから構成され、この軸筒内部にインクタンクが固定されることとなっていた。この軸筒の固定方法は、先軸の外周面及び後軸の内周面に各々突起が設けられ、一方の突起が他方の突起を乗り越えて固定するというものである。また、インクタンクは、その先端部分が先軸に固定されていた。
2. Description of the Related Art Conventionally, a writing instrument having a writing tip such as a ballpoint pen tip or a felt tip and containing ink with relatively high fluidity is provided.
Moreover, the shaft cylinder which is the external structure of such a writing instrument is composed of a front shaft which is a member on the front end side of the shaft tube and a rear shaft which is a member fixed to the rear end of the front shaft. The ink tank was to be fixed inside. This shaft cylinder fixing method is such that protrusions are provided on the outer peripheral surface of the front shaft and the inner peripheral surface of the rear shaft, respectively, and one protrusion gets over the other protrusion and is fixed. In addition, the tip of the ink tank is fixed to the front shaft.

このような筆記具として、下記の特許文献1に記載されるものがある。
下記の特許文献1の筆記具には、上記記載の先軸及び後軸に相当する部材に各々突起が設けられており、一方の突起が他方の突起を乗り越えて固定しているものが開示されている。また、上記記載のインクタンクに相当する部材は、先軸の後端から先軸の内部に挿入固定されている。
As such a writing instrument, there is one described in Patent Document 1 below.
In the writing instrument of the following Patent Document 1, a projection is provided on each of the members corresponding to the front shaft and the rear shaft described above, and one projection is fixed over the other projection. Yes. Further, a member corresponding to the ink tank described above is inserted and fixed from the rear end of the front shaft into the front shaft.

特開2004−306551JP 2004-306551 A

しかし、突起の設計上の微妙な誤差により、一方の突起が他方の突起を乗り越えても、うまく抜け止めとして作用し合わないと、何らかの衝撃等で先軸又は後軸が外れやすくなってしまい、仮に外れた場合には筆記具内のインクが漏れてしまうことが想定される。さらに、先軸の内部に挿入固定されているインクタンクの固定が緩んでしまった場合にも、インク漏れが生ずることが考えられる。
そこで、本発明は、軸筒の固定方法として、従来の先軸及び後軸の2部材のみの固定から、先軸、後軸及びインクタンクの3部材によって固定することにより、軸筒の固定を確実にすることができる筆記具を提供することを課題とする。
However, due to subtle errors in the design of the protrusion, even if one protrusion gets over the other protrusion, if it does not work well as a retaining stopper, the front shaft or the rear shaft is likely to come off due to some kind of impact, etc. If it falls off, it is assumed that the ink in the writing instrument leaks. Furthermore, it is conceivable that ink leakage may occur when the ink tank inserted and fixed inside the front shaft is loosened.
Therefore, in the present invention, as a method of fixing the shaft cylinder, the fixing of the shaft cylinder is performed by fixing the three parts of the front shaft, the rear shaft, and the ink tank from the conventional fixing of only the front shaft and the rear shaft. It is an object to provide a writing instrument that can be sure.

上記の課題を解決するため、本発明は以下のような構成を有する。
(第1の発明)
本願のうち第1の発明は、先端側に位置する先軸11と、後端側に位置する後軸12とが組み合わされてなる筒状の軸筒10と、軸筒10の内部に収容される筒状のインクタンク13とを備えた筆記具1であって、インクタンク13の先端側は、先軸11の後端の内周に嵌入され、先軸11のうちインクタンク13が嵌入される部分及びインクタンク13のうち先軸11から露出している部分は後軸12の先端の内周に嵌入され、先軸11がインクタンク13と接する内側面には、内方へ突出する先軸内方突起11aが設けられ、インクタンク13が先軸11と接する外側面には、外方へ突出するとともに、先軸内方突起11aと係合するインクタンク外方突起13aが設けられ、かつ、インクタンク外方突起13aは、先軸内方突起11aより筆記具1の前方側に位置するように形成され、先軸11の先軸内方突起11aより後方の部分である先軸後端部と、インクタンク13との間には、先軸内方突起11aの高さによる間隙が形成され、後軸12が先軸11を被覆する部分は、先軸後端部が先軸内方突起11aを支点として、間隙を圧縮し、先軸後端部を押圧するように形成されていることを特徴とする。
In order to solve the above problems, the present invention has the following configuration.
(First invention)
The first invention of the present application is a cylindrical shaft cylinder 10 formed by combining a front shaft 11 located on the front end side and a rear shaft 12 located on the rear end side, and is housed inside the shaft cylinder 10. The writing instrument 1 includes a cylindrical ink tank 13. The front end side of the ink tank 13 is inserted into the inner periphery of the rear end of the front shaft 11, and the ink tank 13 is inserted into the front shaft 11. The portion exposed from the front shaft 11 of the portion and the ink tank 13 is fitted into the inner periphery of the front end of the rear shaft 12, and the front shaft that protrudes inward is formed on the inner surface where the front shaft 11 is in contact with the ink tank 13. An inward protrusion 11a is provided, and an ink tank outer protrusion 13a that protrudes outward and engages with the front shaft inner protrusion 11a is provided on the outer surface where the ink tank 13 contacts the front shaft 11, and The ink tank outer protrusion 13a is formed so as to be positioned on the front side of the writing instrument 1 with respect to the front shaft inward protrusion 11a. A gap due to the height of the front shaft inward projection 11a is formed between the rear end portion of the front shaft, which is a rear portion, and the ink tank 13, and the portion where the rear shaft 12 covers the front shaft 11 is The rear end portion of the front shaft is formed so as to compress the gap and press the rear end portion of the front shaft with the front shaft inward projection 11a as a fulcrum.

先軸11とは、筆記具1の外部構造のうち、先端は円錐台形状をしており、筒形状を呈する部材であって、筆記先端40等が収容される。
後軸12とは、筆記具1の外部構造のうち、後端が閉鎖している筒形状であって、先端の内周に先軸11が嵌入している。
このとき、後軸12は、先軸11が挿入される入り口の内径を先軸11の後端側の外径と同一又はやや長く形成している。また、後軸12は、先軸11が嵌入した際に先軸11の後端を被覆する位置の径が縮径するように形成されている。
The tip 11 is a member having a truncated cone shape and a cylindrical shape in the external structure of the writing instrument 1, and the writing tip 40 and the like are accommodated therein.
The rear shaft 12 is a cylindrical shape whose rear end is closed in the external structure of the writing instrument 1, and the front shaft 11 is fitted into the inner periphery of the front end.
At this time, the rear shaft 12 is formed such that the inner diameter of the entrance into which the front shaft 11 is inserted is the same as or slightly longer than the outer diameter on the rear end side of the front shaft 11. The rear shaft 12 is formed so that the diameter of the position covering the rear end of the front shaft 11 is reduced when the front shaft 11 is fitted.

インクタンク13とは、筆記具1において、インクを直接収容する部材であり、後端が閉鎖している筒形状の外観を呈している。
なお、インクタンク外方突起13aが先軸内方突起11aより筆記具1の前方側に位置する理由は、先軸11を後軸12から引き抜こうとしても、先軸内方突起11aがインクタンク外方突起13aに接触し、インクタンク外方突起13aが抜け止めとして作用するので、先軸11が外れることを防止できるためである。
そして、インクタンク13を先軸11に挿入した際に、先軸内方突起11aの高さにより、先軸11の後端側の内周面とインクタンク13の先端側の外周面との間に間隙が生じる。さらに、後軸12が先軸内方突起11aより先軸11の後端側を示す、先軸後端部を押圧することで、先軸後端部が内方に圧縮され、先軸内方突起11aが支点となり間隙を圧縮し、先軸後端部をインクタンク13に押し当てて、先軸11、後軸12及びインクタンク13の3部材で固定したことを特徴とする。
The ink tank 13 is a member that directly stores ink in the writing instrument 1, and has a cylindrical appearance with the rear end closed.
The reason why the ink tank outer protrusion 13a is positioned on the front side of the writing instrument 1 with respect to the front shaft inner protrusion 11a is that the front shaft inner protrusion 11a is outside the ink tank even if the front shaft 11 is pulled out from the rear shaft 12. This is because the ink tank outer protrusion 13a is in contact with the lateral protrusion 13a and acts as a stopper to prevent the front shaft 11 from coming off.
When the ink tank 13 is inserted into the front shaft 11, the height of the front shaft inward projection 11 a causes a gap between the inner peripheral surface on the rear end side of the front shaft 11 and the outer peripheral surface on the front end side of the ink tank 13. A gap occurs in Furthermore, when the rear shaft 12 is pressed toward the rear end portion of the front shaft 11 indicating the rear end side of the front shaft 11 relative to the front shaft inward projection 11a, the front shaft rear end portion is compressed inward, and the front shaft inward The protrusion 11a serves as a fulcrum, compresses the gap, presses the rear end of the front shaft against the ink tank 13, and is fixed by the three members of the front shaft 11, the rear shaft 12, and the ink tank 13.

(第2の発明)
また、本願のうち第2の発明は、上記第1の発明の特徴に加え、先軸内方突起11a及びインクタンク外方突起13aのうち何れか一方が円環状に形成されたことを特徴とする。
この構成によれば、インクタンク13を挿入する際に、あらかじめ係合箇所の位置決めをしておかなくとも円滑にインクタンク13と先軸11とを固定することが可能となる。
(第3の発明)
また、本願のうち第3の発明は、上記第2の発明の特徴に加え、先軸内方突起11a及びインクタンク外方突起13aのうち円環状に形成されていない他方は、複数個の突起として形成されていることを特徴とする。
(Second invention)
The second invention of the present application is characterized in that, in addition to the features of the first invention, any one of the front shaft inward protrusion 11a and the ink tank outward protrusion 13a is formed in an annular shape. To do.
According to this configuration, when the ink tank 13 is inserted, it is possible to fix the ink tank 13 and the front shaft 11 smoothly without positioning the engaging portion in advance.
(Third invention)
In addition to the features of the second invention, the third invention of the present application includes a plurality of protrusions, the other of the front-shaft inward protrusion 11a and the ink tank outer protrusion 13a that are not formed in an annular shape. It is formed as follows.

他方を複数個の突起とする理由は、以下の通りである。
仮に他方が溝であり、溝に嵌め込んで固定する場合では、一方の突起の高さによって生じる間隙が形成されなくなってしまう。そのため、突起が支点となり、後軸12が先軸後端部を押圧することで間隙を圧縮し、先軸後端部をインクタンク13に押し当てて固定することができなくなってしまうからである。
(第4の発明)
また、本願のうち第4の発明は、上記第1、2又は3の発明の特徴に加え、先軸11が後軸12と接する外側面には、外方へ突出する先軸外方突起11bが設けられ、後軸12が先軸11と接する内側面には、内方へ突出するとともに先軸外方突起11bと係合する後軸内方突起12bが設けられ、かつ、後軸内方突起12bは、先軸外方突起11bより筆記具1の前方側に位置するように形成されたことを特徴とする。
The reason for making the other a plurality of protrusions is as follows.
If the other is a groove and is fitted and fixed in the groove, a gap caused by the height of one of the protrusions is not formed. For this reason, the protrusion becomes a fulcrum, and the rear shaft 12 presses the rear end portion of the front shaft to compress the gap, and the front shaft rear end portion cannot be pressed against the ink tank 13 and fixed. .
(Fourth invention)
In addition to the features of the first, second, and third inventions, the fourth invention of the present application is a front shaft outer protrusion 11b that protrudes outward on the outer surface where the front shaft 11 contacts the rear shaft 12. A rear shaft inward projection 12b that protrudes inward and engages with the front shaft outer projection 11b is provided on the inner surface of the rear shaft 12 that contacts the front shaft 11, and the rear shaft inward The protrusion 12b is characterized by being formed so as to be positioned on the front side of the writing instrument 1 with respect to the front-axis outward protrusion 11b.

この構成によれば、後軸内方突起12bが先軸外方突起11bを乗り越え、先軸外方突起11bより後軸内方突起12bが筆記具1の前方側に位置することで、固定箇所を増やすことができる。
また、後軸内方突起12bが先軸外方突起11bより筆記具1の前方側に位置する理由は、先軸11を後軸12から引き抜こうとしても、先軸外方突起11bが後軸内方突起12bに接触し、後軸内方突起12bが抜け止めとして作用するので、先軸11が外れることを防止できるためである。
According to this configuration, the rear shaft inner protrusion 12b gets over the front shaft outer protrusion 11b, and the rear shaft inner protrusion 12b is located on the front side of the writing instrument 1 with respect to the front shaft outer protrusion 11b. Can be increased.
The reason why the rear shaft inward projection 12b is positioned on the front side of the writing instrument 1 with respect to the front shaft outer projection 11b is that the front shaft outer projection 11b is in the rear shaft even if the front shaft 11 is pulled out from the rear shaft 12. This is because the rear shaft inner projection 12b is in contact with the side projection 12b and acts as a retainer, so that the front shaft 11 can be prevented from coming off.

なお、先軸外方突起11bはネジ山の形状も含まれる。   The front-axis outward projection 11b includes a thread shape.

本発明は、以上のように構成されているので、従来の先軸及び後軸の2部材のみの固定から、先軸、後軸及びインクタンクの3部材によって固定することにより、軸筒の固定を確実にすることができる筆記具を提供することができる。   Since the present invention is configured as described above, it is possible to fix the shaft tube by fixing the three members of the front shaft, the rear shaft and the ink tank from the conventional fixing of only the two members of the front shaft and the rear shaft. It is possible to provide a writing instrument capable of ensuring the above.

第1の実施例に係るボールペンの正面図(A)と縦断面図(B)。The front view (A) and longitudinal cross-sectional view (B) of the ball-point pen which concern on a 1st Example. 図1(B)における軸筒の嵌合領域(X)の拡大図。The enlarged view of the fitting area | region (X) of the axial cylinder in FIG. 1 (B). 先軸の正面図(A)と縦断面図(B)。The front view (A) and longitudinal cross-sectional view (B) of a front shaft. 先軸にインク供給部、継手及びボールペンチップを挿入させた状態の縦断面図。The longitudinal cross-sectional view of the state which inserted the ink supply part, the coupling, and the ball-point pen tip in the front shaft. コレクターの縦断面図。The longitudinal cross-sectional view of a collector. ボールペン先端を拡大させた縦断面図。The longitudinal cross-sectional view which expanded the ball-point pen front-end | tip. 継手の斜視図(A)、正面図(B)及び縦断面図(C)。The perspective view (A), front view (B), and longitudinal cross-sectional view (C) of a coupling. 一次成形体の斜視図(A)、正面図(B)及び縦断面図(C)。The perspective view (A), front view (B), and longitudinal cross-sectional view (C) of a primary molded object. 二次成形体の斜視図(A)、正面図(B)及び縦断面図(C)。The perspective view (A), front view (B), and longitudinal cross-sectional view (C) of a secondary molded object. 第2の実施例に係るボールペンの正面図(A)と縦断面図(B)。The front view (A) and longitudinal cross-sectional view (B) of the ball-point pen which concern on a 2nd Example. 図10(B)における軸筒の嵌合領域(Y)の拡大図。The enlarged view of the fitting area | region (Y) of the axial cylinder in FIG.10 (B).

以下、図面を参照しつつ、本発明の実施の形態を筆記具1として内部にコレクターを有するボールペン1を例に説明する。なお、本発明において、筆記具1及びその構成部品についての「前方」とは筆記先端40を筆記具1の先端とした場合の先端側を表し、「後方」とはその反対側を表すものとする。
(第1の実施例)
(全体構造)
ボールペン1は、図1(A)及び(B)に示すように、先端に筆記ボール50を抱持したボールペンチップ40と、ボールペンチップ40にインクを供給するインク供給部30と、ボールペンチップ40及びインク供給部30を繋ぐ継手60と、ボールペンチップ40、継手60及びインク供給部30を内部に収納する軸筒10と、軸筒10先端に装着され、ボールペンチップ40の外周を覆うアウター20とを備えている。
Hereinafter, an embodiment of the present invention will be described using the writing pen 1 as an example and a ballpoint pen 1 having a collector inside as an example. In the present invention, “front” for the writing instrument 1 and its components represents the tip side when the writing tip 40 is the tip of the writing instrument 1, and “rear” represents the opposite side.
(First embodiment)
(Overall structure)
As shown in FIGS. 1A and 1B, the ballpoint pen 1 includes a ballpoint pen tip 40 that holds a writing ball 50 at its tip, an ink supply unit 30 that supplies ink to the ballpoint pen tip 40, a ballpoint pen tip 40, A joint 60 that connects the ink supply unit 30, a ballpoint pen tip 40, a shaft cylinder 10 that houses the joint 60 and the ink supply unit 30, and an outer 20 that is attached to the tip of the shaft cylinder 10 and covers the outer periphery of the ballpoint pen tip 40. I have.

(軸筒の構造)
図1(B)に示すように、軸筒10は、後端が閉鎖している筒形状のインクタンク13と、筒形状で先端は先細り形状をしており、後端の内周にインクタンク13の先端が嵌入している先軸11と、後端が閉鎖している筒形状で、先端の内周に先軸11の後端が嵌入している後軸12とからなる。
図1(B)に示すように、インクタンク13の外径は、先軸11後端の内径と略同径である。図2に示すように、インクタンク13の外周には、インクタンク13の先端から約1/3ほどの位置に、外方へ突出したインクタンク外方突起13aが設けられている。また、インクタンク13には図示しないインクが充填されている。
(Shaft tube structure)
As shown in FIG. 1B, the shaft cylinder 10 has a cylindrical ink tank 13 whose rear end is closed, and a cylindrical shape with a tapered front end, and an ink tank on the inner periphery of the rear end. It consists of a front shaft 11 into which the front end of 13 is fitted, and a rear shaft 12 having a cylindrical shape with the rear end closed and a rear end of the front shaft 11 fitted into the inner periphery of the front end.
As shown in FIG. 1B, the outer diameter of the ink tank 13 is substantially the same as the inner diameter of the rear end of the front shaft 11. As shown in FIG. 2, an ink tank outer protrusion 13 a that protrudes outward is provided on the outer periphery of the ink tank 13 at a position about 1/3 from the tip of the ink tank 13. The ink tank 13 is filled with ink (not shown).

図1(B)に示すように、先軸11は略筒状で、先端は先細り形状をしている。先軸11の外周には、先軸11の後端から約1/3の位置に、外径が後軸12の外径と略同径で、後軸12の先端が当接する先軸鍔部15が設けられている。先軸11は先軸鍔部15を境に、後方の略円筒状をした先軸後部14と、前方の先細り形状をした先軸前部16とからなる。図2に示すように、先軸後部14の内周には、インクタンク13が先軸11に嵌入した際のインクタンク外方突起13aの直後に、内方へ突出した先軸内方突起11aが設けられている。
先軸後部14の外周には、先軸内方突起11aよりも前方に、複数の外方へ突出した先軸外方突起11bが設けられている。図3(B)に示すように、先軸前部16の内周には、先細りし始める位置にインク供給部30と係合するリング状に形成された先軸前部内方突起16aと、継手60に当接するように内周の一部分が肉厚になっている肉厚部16bとが形成されている。
As shown in FIG. 1B, the tip shaft 11 is substantially cylindrical and the tip is tapered. On the outer periphery of the front shaft 11, a front shaft collar portion with an outer diameter approximately the same as the outer diameter of the rear shaft 12 at a position about 1/3 from the rear end of the front shaft 11 and the front end of the rear shaft 12 abuts 15 is provided. The front shaft 11 includes a front shaft rear portion 14 having a substantially cylindrical shape at the front shaft flange portion 15 and a front shaft front portion 16 having a front tapered shape. As shown in FIG. 2, on the inner periphery of the front shaft rear portion 14, a front shaft inner protrusion 11a protruding inward immediately after the ink tank outer protrusion 13a when the ink tank 13 is fitted into the front shaft 11 is provided. Is provided.
On the outer periphery of the front shaft rear portion 14, a plurality of front shaft outer protrusions 11b projecting outward are provided in front of the front shaft inner protrusion 11a. As shown in FIG. 3 (B), on the inner periphery of the front shaft front portion 16, a front shaft front inner protrusion 16a formed in a ring shape that engages with the ink supply unit 30 at a position where the taper begins to taper, and a joint A thick part 16b having a part thick on the inner periphery is formed so as to abut against 60.

また、先軸前部16の前方には、継手60の先端が挿入できるように縮径された先軸前部縮径孔16cと、先軸前部縮径孔16cの前方に連設しているアウター20が挿入されるアウター挿入孔16dとが設けられている。先軸前部16の先端近傍の外周には、他部材が装着できるような溝が設けられており、滑り止めとなるようなグリップ部材16eが装着されている。
図1(B)に示すように、後軸12の内径は、先軸後部14の外径と略同径である。図2に示すように、後軸12の内周には、先軸11が後軸12に嵌入した際に先軸11の後端を被覆する位置に、僅かに径が縮小するように形成された後軸テーパー部12aと、内方へ突出した後軸内方突起12bとが設けられている。
Further, in front of the front shaft front portion 16, a front shaft front reduced diameter hole 16c having a diameter reduced so that the tip of the joint 60 can be inserted, and a front front shaft reduced diameter hole 16c are continuously provided. An outer insertion hole 16d into which the outer 20 is inserted is provided. On the outer periphery in the vicinity of the front end of the front shaft front portion 16, a groove for mounting other members is provided, and a grip member 16e for preventing slipping is mounted.
As shown in FIG. 1B, the inner diameter of the rear shaft 12 is substantially the same as the outer diameter of the front shaft rear portion 14. As shown in FIG. 2, the inner periphery of the rear shaft 12 is formed so that the diameter is slightly reduced at a position that covers the rear end of the front shaft 11 when the front shaft 11 is fitted into the rear shaft 12. Further, a rear shaft taper portion 12a and a rear shaft inward projection 12b projecting inward are provided.

ここで、後軸内方突起12bは、先軸外方突起11bと同数設けられており、先軸外方突起11bと対となるように、各先軸外方突起11bの直前に設けられている。
前述のインクタンク外方突起13a及び先軸内方突起11aは係合している。また、先軸外方突起11b及び後軸内方突起12bも係合している。これらの係合によって、インクタンク外方突起13a、先軸内方突起11a、先軸外方突起11b及び後軸内方突起12bが抜け止めとして作用しているため、インクタンク13、先軸11及び後軸12はそれぞれ外れにくくなっている。また、インクタンク外方突起13a及び先軸内方突起11aはそれぞれリング状に形成された突条である。また、先軸外方突起11b及び後軸内方突起12bも同様に、それぞれリング状に形成された突条である。なお、インクタンク外方突起13a及び先軸内方突起11aは何れか一方のみが周に沿ってリング状に形成された突条であってもよい。また、先軸外方突起11b及び後軸内方突起12bも同様に、何れか一方のみが周に沿ってリング状に形成された突条であってもよい。
Here, the rear shaft inward protrusions 12b are provided in the same number as the front shaft outer protrusions 11b, and are provided immediately in front of the front shaft outer protrusions 11b so as to be paired with the front shaft outer protrusions 11b. Yes.
The ink tank outer protrusion 13a and the front shaft inner protrusion 11a are engaged with each other. Further, the front shaft outer protrusion 11b and the rear shaft inner protrusion 12b are also engaged. By these engagements, the ink tank outer protrusion 13a, the front shaft inner protrusion 11a, the front shaft outer protrusion 11b, and the rear shaft inner protrusion 12b act as stoppers, so that the ink tank 13, the front shaft 11 And the rear shaft 12 is difficult to come off. The ink tank outer protrusion 13a and the front shaft inner protrusion 11a are protrusions formed in a ring shape. Similarly, the front-shaft outward projection 11b and the rear-shaft inward projection 12b are respectively ridges formed in a ring shape. Note that either one of the ink tank outer protrusion 13a and the front shaft inner protrusion 11a may be a protrusion formed in a ring shape along the circumference. Similarly, the front shaft outer protrusion 11b and the rear shaft inner protrusion 12b may be protrusions in which only one of them is formed in a ring shape along the circumference.

(インク供給部)
図4及び図5に示すように、インク供給部30は、略筒状で複数のフィン33が外周に櫛歯状に形成されたコレクター31と、棒状のポリエステルファイバーから成り、コレクター31を軸方向に貫通しており、かつ先端にボールペンチップ40の後端が嵌入しているコレクター芯32とからなる。図5に示すように、コレクター31の先端には、内径が拡径している先端保持部34が設けられている。
図4及び図5に示すように、先端保持部34の外周には、先軸前部16の内周に形成された先軸前部内方突起16aに係合し、先軸前部内方突起16aの直前に設けられたリング状のコレクター鍔部34aと、コレクター鍔部34aの前方に連設し、コレクター鍔部34aよりも径が小さいコレクター段部34bと、コレクター段部34bの前方に連設し、コレクター段部34bよりも径が小さいコレクター当接部34cとが設けられている。
(Ink supply unit)
As shown in FIGS. 4 and 5, the ink supply unit 30 includes a collector 31 having a substantially cylindrical shape and a plurality of fins 33 formed in a comb-like shape on the outer periphery, and a rod-like polyester fiber. And a collector core 32 in which the rear end of the ball-point pen tip 40 is fitted at the front end. As shown in FIG. 5, the tip of the collector 31 is provided with a tip holding portion 34 having an enlarged inner diameter.
As shown in FIGS. 4 and 5, on the outer periphery of the tip holding portion 34, the front shaft front inward protrusion 16a formed on the inner periphery of the front shaft front portion 16 is engaged, and the front shaft front inner protrusion 16a is engaged. A ring-shaped collector collar 34a provided immediately before the collector collar 34a, connected in front of the collector collar 34a, a collector step 34b having a smaller diameter than the collector collar 34a, and connected in front of the collector collar 34b. In addition, a collector contact portion 34c having a diameter smaller than that of the collector step portion 34b is provided.

コレクター31の後端はインクタンク13と接している。また、コレクター芯32の後方はインクタンク13内に突出しており、前方は継手60の後端から継手60の約1/2の位置まで挿入されている。
(ボールペンチップ)
図6に示すように、ボールペンチップ40は、円筒形状のホルダー42と、ホルダー42に挿入され、ホルダー42の後端から突出する棒状の中芯41と、ホルダー42に保持される筆記ボール50とからなる。ホルダー42の先端には、小口を内方に押圧して縮径変形されたカシメ部42aが形成されている。そして、筆記ボール50の先端は、カシメ部42aの先端縁から露出するようになっている。中芯41はコレクター芯32と同様にポリエステルファイバーにより形成され、中芯41の後端はコレクター芯32の先端に嵌め込まれるとともに、中芯41の先端は筆記ボール50の直後に達しており、コレクター芯32に浸透したインクを吸収して筆記ボール50にインクを供給する。さらに、ボールペンチップ40は、後端から約2/3程度が継手60に保持される。
The rear end of the collector 31 is in contact with the ink tank 13. Further, the rear side of the collector core 32 protrudes into the ink tank 13, and the front side is inserted from the rear end of the joint 60 to a position about ½ of the joint 60.
(Ballpoint pen tip)
As shown in FIG. 6, the ballpoint pen tip 40 includes a cylindrical holder 42, a rod-shaped core 41 that is inserted into the holder 42 and protrudes from the rear end of the holder 42, and a writing ball 50 that is held by the holder 42. Consists of. At the tip of the holder 42, a crimping portion 42a that is deformed by reducing the diameter by pressing the fore inward is formed. The tip of the writing ball 50 is exposed from the tip edge of the caulking portion 42a. The core 41 is formed of polyester fiber in the same manner as the collector core 32. The rear end of the core 41 is fitted into the tip of the collector core 32, and the tip of the core 41 reaches immediately after the writing ball 50. The ink penetrating the core 32 is absorbed and supplied to the writing ball 50. Further, about 2/3 of the ballpoint pen tip 40 is held by the joint 60 from the rear end.

なお、コレクター芯32及び中芯41は、使用するインクの粘度等の性状に応じて、適切なポリエステルファイバーの気孔率や表面形状を選択して形成される。
(継手)
図4及び図7に示すように、継手60は、略筒状の中心部材61と、中心部材61後方の外周にコレクター31の先端保持部34の厚さ分の空隙部64を有するように、中心部材61の後端から約1/4から約1/3あたりまでに成形された略筒状の周辺部材62と、周辺部材62の先端から中心部材61の先端から約1/3の位置までを覆うように形成された介在部材63とからなる。
The collector core 32 and the middle core 41 are formed by selecting an appropriate porosity and surface shape of the polyester fiber according to the properties such as the viscosity of the ink used.
(Fitting)
As shown in FIGS. 4 and 7, the joint 60 has a substantially cylindrical center member 61 and a gap portion 64 corresponding to the thickness of the tip holding portion 34 of the collector 31 on the outer periphery behind the center member 61. A substantially cylindrical peripheral member 62 formed from about ¼ to about 3 from the rear end of the central member 61, and from the distal end of the peripheral member 62 to a position of about 3 from the distal end of the central member 61 And an interposition member 63 formed so as to cover.

中心部材61の内部には、後方からコレクター芯32が挿入され、前方からボールペンチップ40が挿入される。また、中心部材61と周辺部材62との間に形成された空隙部64に先端保持部34が嵌合される。
図8(C)に示すように、中心部材61の内周には、後端にコレクター芯32と略同径の後方挿入孔61aと、中芯41の後端付近からホルダー42の後端までに位置し、中芯41と略同径の中央挿入孔61bと、ホルダー42の後端から中心部材61の先端までに位置し、ホルダー42と略同径の先方挿入孔61cとが設けられている。中心部材61の外周には、中心部材61の後方挿入孔61aの先端から1/3より後方で、周辺部材62の先端よりも前方に位置し、先端保持部34の外径よりも径が小さい、リング状の中心部材鍔部61eが形成されている。また、中心部材61の外周は、後端から中心部材鍔部61eまでに位置する後方円柱部後部61dと、中心部材鍔部61eから後方挿入孔61aの先端よりも後方に位置する後方円柱部前部61fと、後方円柱部前部61fの先端から中央挿入孔61bの後端のやや前方までに位置する中央円柱部61gと、中央円柱部61gの先端から中心部材61の先端までに位置する前方円柱部61hとからなる。
In the center member 61, the collector core 32 is inserted from the rear, and the ballpoint pen tip 40 is inserted from the front. Further, the tip holding portion 34 is fitted into a gap portion 64 formed between the central member 61 and the peripheral member 62.
As shown in FIG. 8 (C), at the inner periphery of the center member 61, a rear insertion hole 61a having substantially the same diameter as the collector core 32 is provided at the rear end, and from the vicinity of the rear end of the center core 41 to the rear end of the holder 42. A central insertion hole 61b having substantially the same diameter as the center core 41 and a distal insertion hole 61c having substantially the same diameter as that of the holder 42 are provided from the rear end of the holder 42 to the tip of the central member 61. Yes. The outer periphery of the center member 61 is located behind the end of the rear insertion hole 61a of the center member 61, and is located in front of the end of the peripheral member 62, and has a diameter smaller than the outer diameter of the end holding portion 34. A ring-shaped central member flange 61e is formed. Further, the outer periphery of the center member 61 includes a rear cylindrical portion rear portion 61d located from the rear end to the central member collar portion 61e, and a rear cylindrical portion front portion located rearward from the central member collar portion 61e and the tip of the rear insertion hole 61a. 61f, a central cylindrical portion 61g positioned from the front end of the rear cylindrical portion front portion 61f to the front end of the rear end of the central insertion hole 61b, and a front position positioned from the front end of the central cylindrical portion 61g to the front end of the central member 61. It consists of a cylindrical part 61h.

ここで、後方円柱部後部61d及び後方円柱部前部61fの外径は先端保持部34の内径と略同径で、中央円柱部61gの外径は先軸前部縮径孔16cの径と略同径で、前方円柱部61hの外径はアウター20の後方に設けられた後部挿入孔24の径と略同径である。
図8(C)に示すように、周辺部材62の内径はコレクター31の先端保持部34の外径と略同径である。周辺部材62の内周には、周辺部材62の後端に位置し、僅かに拡径している、周辺部材拡径部62aと、周辺部材62の後端から約1/2に位置し、リング状に形成された周辺部材内方突起62bとが設けられている。ここで、周辺部材拡径部62aの径はコレクター当接部34cの径よりも小さく、先端保持部34を挿入しやすくするために設けられている。また、周辺部材内方突起62bは、インク供給部30の先端保持部34を周辺部材62と中心部材61で挟持するために設けられている。周辺部材62の外周は、周辺部材62の後端から周辺部材内方突起62bまでに位置する周辺部材後方外周部62cと、周辺部材後方外周部62cに連設している周辺部材中央外周部62dと、周辺部材中央外周部62dに連設し、周辺部材62の先端までに位置する周辺部材前方外周部62eとからなる。周辺部材後方外周部62cの径はコレクター段部34bの径と略同じで、周辺部材中央外周部62dの径は周辺部材後方外周部62cの径よりもやや小さく、周辺部材前方外周部62eの径は周辺部材中央外周部62dの径よりもやや小さい。周辺部材前方外周部62eの先端から約1/2の位置には、リング状の周辺部材外方突部62fが設けられている。前記周辺部材外方突部62fには円周方向に少なくとも一カ所以上の欠部62gが設けられている。ここで、前記欠部62gの外径は、周辺部材前方外周部62eの外径と同一である。
Here, the outer diameter of the rear cylinder part rear part 61d and the rear cylinder part front part 61f is substantially the same as the inner diameter of the tip holding part 34, and the outer diameter of the central cylinder part 61g is the same as the diameter of the front shaft front reduced diameter hole 16c. The front cylindrical part 61h has substantially the same diameter, and the outer diameter of the front cylindrical part 61h is substantially the same as the diameter of the rear insertion hole 24 provided behind the outer 20.
As shown in FIG. 8C, the inner diameter of the peripheral member 62 is substantially the same as the outer diameter of the tip holding portion 34 of the collector 31. The inner periphery of the peripheral member 62 is located at the rear end of the peripheral member 62 and slightly expanded in diameter, and is positioned about ½ from the rear end of the peripheral member 62 and the peripheral member 62, A peripheral member inward projection 62b formed in a ring shape is provided. Here, the diameter of the peripheral member enlarged diameter portion 62a is smaller than the diameter of the collector contact portion 34c, and is provided to facilitate the insertion of the tip holding portion 34. Further, the peripheral member inward projection 62b is provided to sandwich the tip holding portion 34 of the ink supply unit 30 between the peripheral member 62 and the central member 61. The outer periphery of the peripheral member 62 has a peripheral member rear outer peripheral portion 62c located from the rear end of the peripheral member 62 to the peripheral member inward projection 62b, and a peripheral member central outer peripheral portion 62d connected to the peripheral member rear outer peripheral portion 62c. And a peripheral member front outer peripheral part 62e that is connected to the peripheral peripheral part 62d of the peripheral member and is located up to the tip of the peripheral member 62. The diameter of the peripheral member rear outer peripheral part 62c is substantially the same as the diameter of the collector step 34b, the diameter of the peripheral member central outer peripheral part 62d is slightly smaller than the diameter of the peripheral member rear outer peripheral part 62c, and the diameter of the peripheral member front outer peripheral part 62e. Is slightly smaller than the diameter of the peripheral member central outer peripheral part 62d. A ring-shaped peripheral member outward protrusion 62f is provided at a position about ½ from the tip of the peripheral member front outer peripheral portion 62e. The peripheral member outward projection 62f is provided with at least one notch 62g in the circumferential direction. Here, the outer diameter of the notched portion 62g is the same as the outer diameter of the peripheral member front outer peripheral portion 62e.

図7及び図9(C)に示すように、介在部材63は、周辺部材62を覆い、外径が周辺部材外方突部62fの径と略同じ、略円筒状の介在部材後方円柱部63aと、介在部材後方円柱部63aに連設し、中心部材鍔部61eまでを覆い、略円錐形状をしている連結部63bと、連結部63bに連設し、中央円柱部61gの中央付近までを覆い、なだらかな円錐形状をした介在部前方円錐部63cとからなる。介在部材後方円柱部63aは周辺部材前方外周部62eの後端から周辺部材62の欠部62gを介して、周辺部材前方外周部62eの先端まで覆っており、結果として、周辺部材外方突部62fと係合している。介在部材63の内周は中心部材61及び周辺部材62の外周に沿うように形成されており、連結部63bの後端に位置する内径は、周辺部材62の内径と同じであり、連結部63bの前方に位置する内径は、介在部材63の内径から、中心部材鍔部61eの外径となるように、除々に縮径していくようなテーパーを有している。   As shown in FIGS. 7 and 9C, the interposition member 63 covers the peripheral member 62 and has a substantially cylindrical interposition member rear column portion 63a having an outer diameter substantially the same as the diameter of the peripheral member outer protrusion 62f. And a connecting part 63b that is connected to the intermediate member rear cylinder part 63a, covers up to the central member collar part 61e, has a substantially conical shape, and is connected to the connecting part 63b to the vicinity of the center of the central cylindrical part 61g. And an intermediate portion front conical portion 63c having a gentle conical shape. The interposed member rear cylindrical portion 63a covers from the rear end of the peripheral member front outer peripheral portion 62e to the tip of the peripheral member front outer peripheral portion 62e through the notch 62g of the peripheral member 62, and as a result, the peripheral member outward protrusion It is engaged with 62f. The inner periphery of the interposed member 63 is formed along the outer periphery of the center member 61 and the peripheral member 62, and the inner diameter located at the rear end of the connecting portion 63b is the same as the inner diameter of the peripheral member 62, and the connecting portion 63b The inner diameter located in front of the taper has a taper that gradually decreases from the inner diameter of the interposed member 63 so as to be the outer diameter of the central member flange 61e.

(二色成形)
継手60は二色成形により成形された部品であり、中心部材61及び周辺部材62を一次成形で成形し、これら中心部材61及び周辺部材62に対し介在部材63を二次成形により一体成形している。介在部材63は連結部63bにおいて、撓りをもたせるため、弾性樹脂材料によって形成される。前記弾性材料としては、成型工程において、金型を用いて、高温下で行うため熱可塑性のエラストマーが望ましい。一次成形体である中心部材61及び周辺部材62の材質はポリアセタール樹脂等の硬質樹脂が望ましい。
(Two-color molding)
The joint 60 is a part formed by two-color molding. The central member 61 and the peripheral member 62 are formed by primary molding, and the interposition member 63 is integrally molded by secondary molding with respect to the central member 61 and the peripheral member 62. Yes. The interposition member 63 is formed of an elastic resin material so as to bend at the connecting portion 63b. As the elastic material, a thermoplastic elastomer is desirable because it is performed at a high temperature using a mold in the molding process. The material of the central member 61 and the peripheral member 62 that are primary molded bodies is preferably a hard resin such as polyacetal resin.

(アウター)
図6に示すように、アウター20は円筒状のアウター固定部21と、このアウター固定部21に連設する略円錐形状のアウターテーパー部22とからなる。アウターテーパー部22の先端には面取りされたアウター先端部23が設けられている。また、アウター20には、後端から先端に向けて孔が形成されており、アウター固定部21の内面には、後部挿入孔24が設けられ、アウターテーパー部22の先端付近の内面には、後部挿入孔24よりも小径の前部挿入孔25が設けられている。アウター固定部21はアウター挿入孔16dに装着されることで、先軸11に固定される。そして、アウター20はボールペンチップ40を被覆する。この際、後部挿入孔24に継手60の前方円柱部61hが挿入され、前部挿入孔25には、継手60から突出しているボールペンチップ40が挿入される。図6に示すように、アウター先端部23はから、筆記ボール50と、筆記ボール50を覆うカシメ部42aとが露出している。
(outer)
As shown in FIG. 6, the outer 20 is composed of a cylindrical outer fixing portion 21 and a substantially conical outer taper portion 22 connected to the outer fixing portion 21. A chamfered outer tip portion 23 is provided at the tip of the outer tapered portion 22. Further, the outer 20 is formed with a hole from the rear end to the front end, the inner surface of the outer fixing portion 21 is provided with a rear insertion hole 24, and the inner surface near the front end of the outer tapered portion 22 is A front insertion hole 25 having a smaller diameter than the rear insertion hole 24 is provided. The outer fixing portion 21 is fixed to the front shaft 11 by being attached to the outer insertion hole 16d. The outer 20 covers the ballpoint pen tip 40. At this time, the front cylindrical portion 61h of the joint 60 is inserted into the rear insertion hole 24, and the ball-point pen tip 40 protruding from the joint 60 is inserted into the front insertion hole 25. As shown in FIG. 6, the writing tip 50 and the crimping portion 42 a covering the writing ball 50 are exposed from the outer front end portion 23.

(ボールペンの組立)
ボールペン1は次のように組み立てる。まず、コレクター31の先端保持部34を継手60の空隙部64に嵌入させ、コレクター31の後端からコレクター芯32を、継手60の先端から筆記ボール50を抱持させたボールペンチップ40をそれぞれ挿入し、コレクター芯32にボールペンチップ40の中芯41を嵌入させる。組み合わせたコレクター31、コレクター芯32、継手60及びボールペンチップ40を先軸11の後端から挿入する。その後ボールペンチップ40を覆うようにしてアウター20を先軸11の内周に装着する。若しくはアウター20を先軸11の内周に装着した後、組み合わせたコレクター31、コレクター芯32、継手60及びボールペンチップ40を先軸11の後端から挿入して組み立ててもよい。
(Ball pen assembly)
The ballpoint pen 1 is assembled as follows. First, the tip holding portion 34 of the collector 31 is fitted into the gap 64 of the joint 60, and the collector core 32 is inserted from the rear end of the collector 31, and the ballpoint pen tip 40 holding the writing ball 50 from the tip of the joint 60 is inserted. Then, the center core 41 of the ballpoint pen tip 40 is inserted into the collector core 32. The combined collector 31, collector core 32, joint 60 and ballpoint pen tip 40 are inserted from the rear end of the front shaft 11. Thereafter, the outer 20 is mounted on the inner periphery of the tip shaft 11 so as to cover the ballpoint pen tip 40. Alternatively, after the outer 20 is mounted on the inner periphery of the front shaft 11, the combined collector 31, collector core 32, joint 60, and ballpoint pen tip 40 may be inserted from the rear end of the front shaft 11 and assembled.

次に、インクの充填されているインクタンク13の外周に先軸11の後端をインクタンク13の先端がコレクター31の後端に当接するまで外挿させる。
最後に、インクタンク13を覆うようにして後軸12の先端の内周に先軸11の後端を挿入する。先軸11を後軸12に挿入する際は、後軸12の先端が先軸鍔部15に当接するまで挿入させる。
(先軸、後軸及びインクタンクの嵌合方法)
このとき、インクタンク13と先軸11との固定方法は、インクタンク13の先端がコレクター31の後端に当接するように挿入された際に、先軸内方突起11aよりインクタンク外方突起13aを直前に位置させることで、各々の突起が抜け止めとして作用するというものである。
Next, the rear end of the front shaft 11 is extrapolated on the outer periphery of the ink tank 13 filled with ink until the front end of the ink tank 13 contacts the rear end of the collector 31.
Finally, the rear end of the front shaft 11 is inserted into the inner periphery of the front end of the rear shaft 12 so as to cover the ink tank 13. When the front shaft 11 is inserted into the rear shaft 12, the front shaft 11 is inserted until the front end of the rear shaft 12 contacts the front shaft flange 15.
(Fitting method of front shaft, rear shaft and ink tank)
At this time, the ink tank 13 and the front shaft 11 are fixed in such a manner that the ink tank outer protrusion 11a protrudes from the front shaft inner protrusion 11a when the ink tank 13 is inserted so that the front end of the ink tank 13 contacts the rear end of the collector 31. By positioning 13a immediately before, each projection acts as a retaining stopper.

また、インクタンク13が先軸11に挿入された際には、先軸内方突起11aの高さにより、先軸11の後端の内周面とインクタンク13の先端の外周面との間に間隙が生じる。
なお、後軸12とインクタンク13との固定方法は、特に限定するものではない。例えば、後軸12の内径が後端にかけて、インクタンク13の外径より短くなるように形成され、後軸12がインクタンク13を押圧固定する方法や、インクタンク外方突起13aと後軸内方突起12bとが係合するように設けられ、一方の突起が他方の突起を乗り越え、各々の突起が抜け止めとして作用する方法であってもよい。
Further, when the ink tank 13 is inserted into the front shaft 11, the height of the front shaft inward protrusion 11 a causes a gap between the inner peripheral surface of the rear end of the front shaft 11 and the outer peripheral surface of the front end of the ink tank 13. A gap occurs in
The method for fixing the rear shaft 12 and the ink tank 13 is not particularly limited. For example, the rear shaft 12 is formed so that the inner diameter of the rear shaft 12 is shorter than the outer diameter of the ink tank 13 toward the rear end, and the rear shaft 12 presses and fixes the ink tank 13, or the ink tank outer protrusion 13a and the rear shaft Alternatively, the projections 12b may be engaged with each other, and one projection may overcome the other projection, and each projection may act as a retainer.

そして、後軸12と先軸11とは、後軸12が先軸11を被覆した際に、先軸外方突起11bより後軸内方突起12bを直前に位置させ、各々の突起が抜け止めとして作用し、同時に、後軸テーパー部12aによって先軸11の後端が内方に圧縮され、先軸内方突起11aが支点となり間隙を圧縮し、先軸11の後端をインクタンク13に押し当てて、固定するものである。
その結果、先軸11の後端がインクタンク13の外周面に押しつけられ、先軸内方突起11a及びインクタンク外方突起13a並びに先軸外方突起11b及び後軸内方突起12bの抜け止め作用も加わり、強固に固定することが可能となっている。
The rear shaft 12 and the front shaft 11 are arranged such that when the rear shaft 12 covers the front shaft 11, the rear shaft inner projection 12b is positioned immediately before the front shaft outer projection 11b, and each projection is prevented from coming off. At the same time, the rear end of the front shaft 11 is compressed inward by the rear shaft taper portion 12a, the front shaft inward projection 11a serves as a fulcrum to compress the gap, and the rear end of the front shaft 11 is moved to the ink tank 13. It is pressed and fixed.
As a result, the rear end of the front shaft 11 is pressed against the outer peripheral surface of the ink tank 13, and the front shaft inner protrusion 11a, the ink tank outer protrusion 13a, the front shaft outer protrusion 11b, and the rear shaft inner protrusion 12b are prevented from coming off. In addition, it can be firmly fixed.

さらに、先軸内方突起11aを支点として後軸テーパー部12aが先軸11の後端を押圧したことで、反作用により、先軸内方突起11aより前方側が外方に押圧されるため、先軸外方突起11bと後軸内方突起12bとの抜け止め作用が高まり、より強固に固定することが可能となっている。
(第2の実施例)
以下、図10及び図11を参照して、本発明の実施形態に係る第2の実施例を説明する。なお、第1の実施例における図5〜図9は、第2の実施例と共通である。また、第2の実施例において、第1の実施例と同一の構成要素には、第1の実施例において用いた符号と同一の符号を用いている。そして、第1の実施例と重複する部分は説明を省略し、第2の実施例における特徴点を中心に説明する。
Further, since the rear taper portion 12a presses the rear end of the front shaft 11 with the front shaft inward protrusion 11a as a fulcrum, the front side is pressed outward from the front shaft inward protrusion 11a by the reaction. The action of preventing the outer shaft protrusion 11b and the rear shaft inner protrusion 12b from coming off is enhanced, and the shaft can be fixed more firmly.
(Second embodiment)
A second example according to the embodiment of the present invention will be described below with reference to FIGS. 10 and 11. 5 to 9 in the first embodiment are common to the second embodiment. In the second embodiment, the same reference numerals as those used in the first embodiment are used for the same components as those in the first embodiment. The description overlapping with the first embodiment will be omitted, and the description will focus on the feature points in the second embodiment.

第2の実施例においては、先軸外方突起11bがネジ山の形状を呈していて、後軸内方突起12bとは螺合によって固定されるといったものである。
(全体構造)
ボールペン1は、図10(A)及び(B)に示すように、先端に筆記ボール50を抱持したボールペンチップ40と、ボールペンチップ40にインクを供給するインク供給部30と、ボールペンチップ40及びインク供給部30を繋ぐ継手60と、ボールペンチップ40、継手60及びインク供給部30を内部に収納する軸筒10と、軸筒10先端に装着され、ボールペンチップ40の外周を覆うアウター20とを備えている。
In the second embodiment, the front shaft outward projection 11b has a thread shape, and is fixed to the rear shaft inward projection 12b by screwing.
(Overall structure)
As shown in FIGS. 10A and 10B, the ball-point pen 1 includes a ball-point pen tip 40 that holds a writing ball 50 at its tip, an ink supply unit 30 that supplies ink to the ball-point pen tip 40, a ball-point pen tip 40, A joint 60 that connects the ink supply unit 30, a ballpoint pen tip 40, a shaft cylinder 10 that houses the joint 60 and the ink supply unit 30, and an outer 20 that is attached to the tip of the shaft cylinder 10 and covers the outer periphery of the ballpoint pen tip 40. I have.

(先軸の構造)
第2の実施例の先軸11は、図11に示すように、先軸後部14の外周面に沿ってネジ山の形状を呈した先軸外方突起11bが形成されていることを特徴とする。なお、その他の先軸11の構成は、第1の実施例と共通するため説明は省略する。
(先軸、後軸及びインクタンクの嵌合方法)
インクタンク13と先軸11との固定方法は、第1の実施例と共通するため説明は省略する。
(Axis structure)
As shown in FIG. 11, the front shaft 11 of the second embodiment is characterized in that a front shaft outer protrusion 11b having a thread shape is formed along the outer peripheral surface of the front shaft rear portion 14. To do. The other configuration of the front shaft 11 is the same as that of the first embodiment, so that the description thereof is omitted.
(Fitting method of front shaft, rear shaft and ink tank)
Since the fixing method of the ink tank 13 and the front shaft 11 is the same as that of the first embodiment, the description thereof is omitted.

後軸12とインクタンク13との固定方法は、第1の実施例と共通するため説明は省略する。
そして、後軸12と先軸11とは、先軸外方突起11bと後軸内方突起12bとを螺合させるように先軸11を後軸12に挿入し、同時に、後軸テーパー部12aによって先軸11の後端が内方に圧縮され、先軸内方突起11aが支点となり間隙を圧縮し、先軸11の後端をインクタンク13に押し当てて、固定するものである。
Since the method for fixing the rear shaft 12 and the ink tank 13 is the same as that in the first embodiment, description thereof is omitted.
The rear shaft 12 and the front shaft 11 are inserted into the rear shaft 12 so that the front shaft outer protrusion 11b and the rear shaft inner protrusion 12b are screwed together, and at the same time, the rear shaft taper portion 12a As a result, the rear end of the front shaft 11 is compressed inward, the front shaft inner protrusion 11a serves as a fulcrum to compress the gap, and the rear end of the front shaft 11 is pressed against the ink tank 13 and fixed.

この発明は、ボールペンやマーカーペンなどの筆記具に利用することができる。   The present invention can be used for writing instruments such as ballpoint pens and marker pens.

1 筆記具又はボールペン 10 軸筒
11 先軸 11a 先軸内方突起
11b 先軸外方突起 12 後軸
12a 後軸テーパー部 12b 後軸内方突起
13 インクタンク 13a インクタンク外方突起
14 先軸後部 15 先軸鍔部
16 先軸前部 16a 先軸前部内方突起
16b 肉厚部 16c 先軸前部縮径孔
16d アウター挿入孔 16e グリップ部材
20 アウター 21 アウター固定部
22 アウターテーパー部 23 アウター先端部
24 後部挿入孔 25 前部挿入孔
30 インク供給部 31 コレクター
32 コレクター芯 33 フィン
34 先端保持部 34a コレクター鍔部
34b コレクター段部 34c コレクター当接部
40 筆記先端又はボールペンチップ 41 中芯
42 ホルダー 42a カシメ部
50 筆記ボール 60 継手
61 中心部材 61a 後方挿入孔
61b 中央挿入孔 61c 前方挿入孔
61d 後方円柱部後部 61e 中心部材鍔部
61f 後方円柱部前部 61g 中央円柱部
61h 前方円柱部 62 周辺部材
62a 周辺部材拡径部 62b 周辺部材内方突起
62c 周辺部材後方外周部 62d 周辺部材中央外周部
62e 周辺部材前方外周部 62f 周辺部材外方突部
62g 欠部 63 介在部材
63a介在部材後方円柱部 63b 連結部
63c介在部前方円錐部 64 空隙部
1 Writing instrument or ballpoint pen 10 shaft cylinder
11 Lead shaft 11a Lead shaft inward projection
11b Protrusion of the front shaft 12 Rear shaft
12a Rear shaft taper 12b Rear shaft inward projection
13 Ink tank 13a Ink tank outward protrusion
14 Rear of the front shaft 15 Front shaft collar
16 Front shaft front 16a Front shaft front inward projection
16b Thick part 16c Reduced diameter hole on front shaft
16d Outer insertion hole 16e Grip member
20 Outer 21 Outer fixing part
22 Outer taper 23 Outer tip
24 Rear insertion hole 25 Front insertion hole
30 Ink supply unit 31 Collector
32 Collector core 33 Fin
34 Tip holder 34a Collector collar
34b Collector step 34c Collector contact
40 Writing tip or ballpoint pen tip 41 Core
42 Holder 42a Caulking section
50 writing balls 60 fittings
61 Center member 61a Rear insertion hole
61b Center insertion hole 61c Front insertion hole
61d Rear cylinder rear part 61e Center member collar
61f Rear cylinder front 61g Central cylinder
61h Front cylinder 62 Peripheral member
62a Peripheral member enlarged diameter part 62b Peripheral member inward projection
62c Peripheral member rear outer periphery 62d Peripheral member center outer periphery
62e Peripheral member front outer periphery 62f Peripheral member outward protrusion
62g Notch 63 Interposition member
63a Intermediary member rear cylinder 63b Connecting part
63c Intermediary front cone 64 Air gap

また、先軸前部16の前方には、継手60の先端が挿入できるように縮径された先軸前部縮径孔16cと、先軸前部縮径孔16cの前方に連設しているアウター20が挿入されるアウター挿入孔16dとが設けられている。先軸前部16の先端近傍の外周には、他部材が装着できるような溝が設けられており、この溝には滑り止めとなるようなグリップ部材16eが装着されている。
図1(B)に示すように、後軸12の内径は、先軸後部14の外径と略同径である。図2に示すように、後軸12の内周には、先軸11が後軸12に嵌入した際に先軸11の後端を被覆する位置に、僅かに径が縮小するように形成された後軸テーパー部12aと、内方へ突出した後軸内方突起12bとが設けられている。
Further, in front of the front shaft front portion 16, a front shaft front reduced diameter hole 16c having a diameter reduced so that the tip of the joint 60 can be inserted, and a front front shaft reduced diameter hole 16c are continuously provided. An outer insertion hole 16d into which the outer 20 is inserted is provided. On the outer periphery in the vicinity of the front end of the front shaft front portion 16, a groove is provided so that other members can be mounted, and a grip member 16e that prevents slipping is mounted in this groove .
As shown in FIG. 1B, the inner diameter of the rear shaft 12 is substantially the same as the outer diameter of the front shaft rear portion 14. As shown in FIG. 2, the inner periphery of the rear shaft 12 is formed so that the diameter is slightly reduced at a position that covers the rear end of the front shaft 11 when the front shaft 11 is fitted into the rear shaft 12. Further, a rear shaft taper portion 12a and a rear shaft inward projection 12b projecting inward are provided.

(インク供給部)
図4及び図5に示すように、インク供給部30は、略筒状で複数のフィン33が外周に櫛歯状に形成されたコレクター31と、棒状のポリエステルファイバーから成り、コレクター31を軸方向に貫通しており、かつ先端が継手60の後端嵌入しているコレクター芯32とからなる。図5に示すように、コレクター31の先端には、内径が拡径している先端保持部34が設けられている。
図4及び図5に示すように、先端保持部34の外周には、先軸前部16の内周に形成された先軸前部内方突起16aに係合し、先軸前部内方突起16aの直前に設けられたリング状のコレクター鍔部34aと、コレクター鍔部34aの前方に連設し、コレクター鍔部34aよりも径が小さいコレクター段部34bと、コレクター段部34bの前方に連設し、コレクター段部34bよりも径が小さいコレクター当接部34cとが設けられている。
(Ink supply unit)
As shown in FIGS. 4 and 5, the ink supply unit 30 includes a collector 31 having a substantially cylindrical shape and a plurality of fins 33 formed in a comb-like shape on the outer periphery, and a rod-like polyester fiber. And a collector core 32 having a leading end fitted into the rear end of the joint 60 . As shown in FIG. 5, the tip of the collector 31 is provided with a tip holding portion 34 having an enlarged inner diameter.
As shown in FIGS. 4 and 5, on the outer periphery of the tip holding portion 34, the front shaft front inward protrusion 16a formed on the inner periphery of the front shaft front portion 16 is engaged, and the front shaft front inner protrusion 16a is engaged. A ring-shaped collector collar 34a provided immediately before the collector collar 34a, connected in front of the collector collar 34a, a collector step 34b having a smaller diameter than the collector collar 34a, and connected in front of the collector collar 34b. In addition, a collector contact portion 34c having a diameter smaller than that of the collector step portion 34b is provided.

(アウター)
図6に示すように、アウター20は円筒状のアウター固定部21と、このアウター固定部21に連設する略円錐形状のアウターテーパー部22とからなる。アウターテーパー部22の先端には面取りされたアウター先端部23が設けられている。また、アウター20には、後端から先端に向けて孔が形成されており、アウター固定部21の内面には、後部挿入孔24が設けられ、アウターテーパー部22の先端付近の内面には、後部挿入孔24よりも小径の前部挿入孔25が設けられている。アウター固定部21はアウター挿入孔16dに装着されることで、先軸11に固定される。そして、アウター20はボールペンチップ40を被覆する。この際、後部挿入孔24に継手60の前方円柱部61hが挿入され、前部挿入孔25には、継手60から突出しているボールペンチップ40が挿入される。図6に示すように、アウター先端部23から、筆記ボール50と、筆記ボール50を覆うカシメ部42aとが露出している。
(outer)
As shown in FIG. 6, the outer 20 is composed of a cylindrical outer fixing portion 21 and a substantially conical outer taper portion 22 connected to the outer fixing portion 21. A chamfered outer tip portion 23 is provided at the tip of the outer tapered portion 22. Further, the outer 20 is formed with a hole from the rear end to the front end, the inner surface of the outer fixing portion 21 is provided with a rear insertion hole 24, and the inner surface near the front end of the outer tapered portion 22 is A front insertion hole 25 having a smaller diameter than the rear insertion hole 24 is provided. The outer fixing portion 21 is fixed to the front shaft 11 by being attached to the outer insertion hole 16d. The outer 20 covers the ballpoint pen tip 40. At this time, the front cylindrical portion 61h of the joint 60 is inserted into the rear insertion hole 24, and the ball-point pen tip 40 protruding from the joint 60 is inserted into the front insertion hole 25. As shown in FIG. 6, the outer tip 2 three, et al., The writing ball 50, a caulking portion 42a for covering the writing ball 50 is exposed.

Claims (4)

先端側に位置する先軸と、後端側に位置する後軸とが組み合わされてなる筒状の軸筒と、前記軸筒の内部に収容される筒状のインクタンクとを備えた筆記具であって、
前記インクタンクの先端側は、前記先軸の後端の内周に嵌入され、前記先軸のうち前記インクタンクが嵌入される部分及び前記インクタンクのうち前記先軸から露出している部分は前記後軸の先端の内周に嵌入され、
前記先軸が前記インクタンクと接する内側面には、内方へ突出する先軸内方突起が設けられ、
前記インクタンクが前記先軸と接する外側面には、外方へ突出するとともに、前記先軸内方突起と係合するインクタンク外方突起が設けられ、かつ、前記インクタンク外方突起は、前記先軸内方突起より筆記具の前方側に位置するように形成され、
前記先軸の前記先軸内方突起より後方の部分である先軸後端部と、前記インクタンクとの間には、該先軸内方突起の高さによる間隙が形成され、前記後軸が前記先軸を被覆する部分は、前記先軸後端部が該先軸内方突起を支点として、前記間隙を圧縮し、前記先軸後端部を押圧するように形成されていることを特徴とする筆記具。
A writing instrument including a cylindrical shaft cylinder formed by combining a front shaft positioned on the front end side and a rear shaft positioned on the rear end side, and a cylindrical ink tank accommodated in the shaft cylinder. There,
The front end side of the ink tank is inserted into the inner periphery of the rear end of the front shaft, and the portion of the front shaft where the ink tank is inserted and the portion of the ink tank exposed from the front shaft are Inserted into the inner periphery of the tip of the rear shaft,
On the inner side surface where the tip shaft contacts the ink tank, a tip shaft inward projection protruding inward is provided,
The outer surface of the ink tank in contact with the front shaft protrudes outward and is provided with an ink tank outer protrusion that engages with the front shaft inward protrusion, and the ink tank outer protrusion is It is formed so as to be located on the front side of the writing instrument from the front axis inward projection,
A gap is formed between the front shaft rear end, which is a portion of the front shaft rearward from the front shaft inward projection, and the height of the front shaft inward projection. The portion covering the front shaft is formed such that the rear end portion of the front shaft compresses the gap and presses the rear end portion of the front shaft with the inward protrusion of the front shaft as a fulcrum. Characteristic writing instrument.
前記先軸内方突起及び前記インクタンク外方突起のうち何れか一方が円環状に形成されたことを特徴とする請求項1記載の筆記具。   The writing instrument according to claim 1, wherein one of the front shaft inward protrusion and the ink tank outward protrusion is formed in an annular shape. 前記先軸内方突起及び前記インクタンク外方突起のうち円環状に形成されていない他方は、複数個の突起として形成されていることを特徴とする請求項2記載の筆記具。   3. The writing instrument according to claim 2, wherein the other of the front shaft inner protrusion and the ink tank outer protrusion, which is not formed in an annular shape, is formed as a plurality of protrusions. 前記先軸が前記後軸と接する外側面には、外方へ突出する先軸外方突起が設けられ、
前記後軸が前記先軸と接する内側面には、内方へ突出するとともに前記先軸外方突起と係合する後軸内方突起が設けられ、かつ、前記後軸内方突起は、前記先軸外方突起より筆記具の前方側に位置するように形成されたことを特徴とする請求項1、2又は3記載の筆記具。
On the outer surface where the front shaft is in contact with the rear shaft, a front shaft outer protrusion that protrudes outward is provided,
A rear shaft inward projection that protrudes inward and engages with the front shaft outward projection is provided on an inner side surface of the rear shaft in contact with the front shaft, and the rear shaft inward projection is 4. The writing instrument according to claim 1, wherein the writing instrument is formed so as to be positioned on the front side of the writing instrument with respect to the front-axis outward projection.
JP2014081724A 2014-04-10 2014-04-11 Writing instrument Active JP6320830B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2014081724A JP6320830B2 (en) 2014-04-11 2014-04-11 Writing instrument
US15/302,409 US9889701B2 (en) 2014-04-10 2015-04-09 Writing implement
EP15777299.7A EP3130476B1 (en) 2014-04-10 2015-04-09 Writing tool
TW104111446A TWI649219B (en) 2014-04-10 2015-04-09 Writing utensil
PCT/JP2015/061093 WO2015156352A1 (en) 2014-04-10 2015-04-09 Writing tool
CN201580017797.9A CN106132724B (en) 2014-04-10 2015-04-09 Writing implement

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001239785A (en) * 2000-02-28 2001-09-04 Pentel Corp Connecting structure for member of writing tool
JP2009101650A (en) * 2007-10-25 2009-05-14 Pilot Corporation Writing utensil
JP2013035230A (en) * 2011-08-09 2013-02-21 Mitsubishi Pencil Co Ltd Barrel for writing utensil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001239785A (en) * 2000-02-28 2001-09-04 Pentel Corp Connecting structure for member of writing tool
JP2009101650A (en) * 2007-10-25 2009-05-14 Pilot Corporation Writing utensil
JP2013035230A (en) * 2011-08-09 2013-02-21 Mitsubishi Pencil Co Ltd Barrel for writing utensil

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