JP4913483B2 - Writing structure connection structure - Google Patents

Writing structure connection structure Download PDF

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JP4913483B2
JP4913483B2 JP2006173796A JP2006173796A JP4913483B2 JP 4913483 B2 JP4913483 B2 JP 4913483B2 JP 2006173796 A JP2006173796 A JP 2006173796A JP 2006173796 A JP2006173796 A JP 2006173796A JP 4913483 B2 JP4913483 B2 JP 4913483B2
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writing
reinforcing
press
fitted
pipe
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JP2008001009A (en
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守雄 秋山
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ゼブラ株式会社
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本発明は、ボールペン用リフィールやシャープペンシル用リフィール等のリフィールにおいて、その筆記部を軸方向に接続している接続構造に関し、特にボールペン用リフィールを構成するのに好適な筆記部の接続構造に関するものである。   The present invention relates to a connection structure in which writing parts are connected in an axial direction in a refill such as a refill for a ballpoint pen or a refill for a mechanical pencil, and more particularly to a connection structure for a writing part suitable for constituting a refill for a ballpoint pen. It is.

従来、この種の発明には、例えば特許文献1に記載されたもののように、インキ収容管(7)と筆記部(ボールペンチップ1)とを、合成樹脂製のホルダー(2)を介して接続することで、ボールペン用リフィールを構成しているものがある。
この従来技術では、ホルダー(2)から筆記部(ボールペンチップ1)にわたる範囲に支持筒(8)を環装し、この支持筒(8)によって筆記部(ボールペンチップ1)のぐらつきや折れ曲がりを防ぐようにしている。
Conventionally, in this kind of invention, an ink containing tube (7) and a writing part (ball-point pen tip 1) are connected via a synthetic resin holder (2) as described in Patent Document 1, for example. As a result, there are some which constitute a refill for ballpoint pens.
In this prior art, a support cylinder (8) is mounted in a range extending from the holder (2) to the writing part (ballpoint pen tip 1), and the wobbling or bending of the writing part (ballpoint pen tip 1) is prevented by the support cylinder (8). I am doing so.

しかしながら、上記従来技術によれば、ホルダー(2)に対し筆記部(ボールペンチップ1)を、単に圧入した構造であるため、落下衝撃やその他の外力等に起因して、筆記部(ボールペンチップ1)がホルダー(2)から抜けてしまうおそれがある。
特開平8−207486号公報
However, according to the above prior art, since the writing part (ballpoint pen tip 1) is simply press-fitted into the holder (2), the writing part (ballpoint tip 1) is caused by a drop impact or other external force. ) May come off the holder (2).
JP-A-8-207486

本発明は上記従来事情に鑑みてなされたものであり、その課題とする処は、筆記部が抜けてしまうようなことを防ぐことができる筆記部の接続構造を提供することにある。   This invention is made | formed in view of the said conventional situation, The process made into the subject is providing the connection structure of a writing part which can prevent that a writing part falls out.

上記課題を解決するための手段は、筆記部を筒状部材の前端に圧入嵌合するようにした筆記部の接続構造であって、前記圧入嵌合の箇所において径方向に圧接し合う面の内の一方または双方に、多数の微細な凹凸部を設け、前記圧入嵌合の箇所の外周に、筒状の補強部材被嵌合部が形成され、この補強部材被嵌合部には、筒状の補強部材が環状に装着され、前記補強部材被嵌合部の外周面には、前記補強部材をその内周面側から押圧するように複数の縦リブが、周方向に等間隔を置いて設けられ、前記補強部材には、前記筆記部の外周部を直接押圧する部分がないことを特徴とする Means for solving the above problem is a writing part connection structure in which the writing part is press-fitted to the front end of the cylindrical member, and the surface of the surface that is press-fitted in the radial direction at the place of the press-fitting fitting. A large number of fine uneven portions are provided on one or both of them, and a cylindrical reinforcing member fitted portion is formed on the outer periphery of the press-fitting portion. A plurality of vertical ribs are arranged at equal intervals in the circumferential direction so as to press the reinforcing member from the inner peripheral surface side thereof on the outer peripheral surface of the reinforcing member fitted portion. The reinforcing member has no portion that directly presses the outer peripheral portion of the writing portion .

第一の形態は、筆記部を筒状部材の前端に圧入嵌合するようにした筆記部の接続構造であって、前記圧入嵌合の箇所において径方向に圧接し合う面の内の一方または双方に、多数の微細な凹凸部を設けたことを特徴とする。
ここで、上記筆記部は、好ましい具体例としては金属製のボールペン用チップとされるが、他例としてはシャープペンシル用の筆記部であってもよい。
また、上記筒状部材とは、上記筆記部が圧入嵌合される対象の筒状物であればよく、この筒状部材には、ボールペン用リフィールにおけるインク収容管や、シャープペンシル用リフィールにおける芯タンク、これらインク収容管または新タンクと上記筆記部との間に介在される筒状物等を含む。
The first form is a connecting structure of a writing part in which the writing part is press-fitted to the front end of the cylindrical member, and one or the other of the surfaces that are pressed in the radial direction at the place of the press-fitting or Both are provided with a large number of fine irregularities.
Here, although the said writing part is made into the tip for metal ball-point pens as a preferable specific example, it may be a writing part for mechanical pencils as another example.
The cylindrical member may be a cylindrical object to which the writing unit is press-fitted, and the cylindrical member includes an ink storage tube in a ballpoint pen refill and a core in a mechanical pencil refill. A tank, a cylinder or the like interposed between the ink storage tube or the new tank and the writing portion.

また、第二の形態では、上記多数の微細な凹凸部が、上記圧入嵌合の箇所において径方向に圧接し合う双方の面に、それぞれ設けられている。 Further, in the second embodiment, the number of fine irregularities is a surface of both mutually pressed in the radial direction at the location of the press-fitting, that provided respectively.

また、第三の形態では、上記多数の微細な凹凸部が、螺旋状に形成されている。 Further, in the third embodiment, the number of fine irregularities is that is formed in a spiral shape.

また、第四の形態では、上記圧入嵌合の箇所の外周に、略筒状の補強部材を環状に装着した。 Moreover, in the 4th form , the substantially cylindrical reinforcement member was mounted | worn to the outer periphery of the location of the said press-fit fitting .

また、第五の形態では、上記筆記部の後部側に、上記筒状部材として合成樹脂製の接続部材を圧入嵌合し、該接続部材の後部側に対し、金属製のパイプ材を環状に圧入嵌合するようにした接続構造であって、前記接続部材に、前記パイプ材の内周面によって圧接される環状凸部と、該環状凸部よりも筆記部側に配置されるとともに環状凸部よりも外径の小さい環状凹部とを設けた。 In the fifth embodiment , a synthetic resin connecting member is press-fitted as the cylindrical member to the rear side of the writing part, and a metal pipe member is annularly formed on the rear side of the connecting member. A connection structure for press-fitting and fitting, wherein the connection member is provided with an annular convex portion that is press-contacted by an inner peripheral surface of the pipe member, and is disposed closer to the writing portion than the annular convex portion, and the annular convex portion An annular recess having an outer diameter smaller than the portion was provided .

すなわち、この第五の形態では、上記構成により、上記被嵌合部に上記パイプ材を圧入嵌合する際に発生する前記環状凸部の削り屑が、上記パイプ材と前記環状凹部との間に内在されるようにしている That is, in the fifth embodiment , with the above configuration, the shavings of the annular convex portion generated when the pipe material is press-fitted and fitted into the fitted portion are between the pipe material and the annular concave portion. To be inherent in .

上記形態は、以上説明したように構成されているので、以下に記載されるような作用効果を奏する。
第一の形態によれば、多数の微細な凹凸部による摩擦抵抗により、筆記部が抜けてしまうようなことを防ぐことができる。
Since the said form is comprised as demonstrated above, there exists an effect as described below.
According to the 1st form , it can prevent that a writing part falls out by the frictional resistance by many fine uneven | corrugated | grooved parts.

更に、第二の形態によれば、圧入嵌合の箇所において、多数の微細な凹凸部が径方向に圧接し合う構成であるため、筆記部が抜けてしまうようなことを、より確実に防ぐことができる。 Furthermore, according to the second embodiment , since a large number of fine irregularities are pressed against each other in the radial direction at the press-fitting location, it is possible to more reliably prevent the writing part from falling out. be able to.

更に、第三の形態によれば、螺旋状の凹凸部により、筆記部が抜けてしまうのを効果的に防ぐことができる上、螺旋状の凹凸部を例えば旋盤等の工作機械により容易に形成することができる。 Furthermore, according to the third embodiment , the spiral concavo-convex portion can effectively prevent the writing portion from coming off, and the spiral concavo-convex portion can be easily formed by a machine tool such as a lathe. can do.

更に、第四の形態によれば、筆記部のがたつきを補強部材により防ぐことができ、ひいては、筆記部のがたつきに起因して、圧入嵌合の箇所の径方向の面圧が低下し、インク洩れを生じたり筆記部が抜けてしまったりするようなことを防ぐことができる。 Furthermore, according to the fourth embodiment , rattling of the writing part can be prevented by the reinforcing member, and as a result, the radial surface pressure of the press-fitting portion is caused by the rattling of the writing part. It is possible to prevent the ink leakage and the writing part from falling out.

更に、第五の形態によれば、接続部材に対し金属製のパイプ材を環状に圧入嵌合させている最中、接続部材の環状凸部がパイプ材の前端部によって削られるが、その際に発生した削り屑は、パイプ材と環状凹部との間の隙間に挟まれるようにして内在される。
したがって、前記削り屑が、他の部品に付着したり、リフィール後端から内部へ侵入したり等の品質上の問題が生じるようなことを防ぐことができる
Furthermore, according to the fifth embodiment , the annular convex portion of the connection member is scraped by the front end portion of the pipe member while the metal pipe member is annularly press-fitted into the connection member. The shavings generated in this are contained so as to be sandwiched in the gap between the pipe material and the annular recess.
Accordingly, it is possible to prevent the shavings from adhering to other parts or causing quality problems such as intrusion from the rear end of the refill .

次に、上記形態の好ましい具体例を、図面に基づいて説明する。
図1は、本発明に係わる接続構造を適用したに示すボールペン用リフィールAの一例を示している。
このボールペン用リフィールAは、最先端部からインク(図示せず)を吐出可能な筆記部10と、該筆記部10の後端側に接続された接続部材20と、該接続部材20の前端側外周に環装された補強部材30と、同接続部材20の後端側に圧入嵌合されたパイプ材40とを備え、接続部材20とパイプ材40との嵌合構造として本発明に係わる接続構造を適用している。
Next, a preferred specific example of the above embodiment will be described with reference to the drawings.
FIG. 1 shows an example of a ballpoint pen refill A shown in FIG. 1 to which the connection structure according to the present invention is applied.
The ballpoint pen refill A includes a writing unit 10 capable of discharging ink (not shown) from the most advanced portion, a connecting member 20 connected to the rear end side of the writing unit 10, and a front end side of the connecting member 20 A connection member according to the present invention is provided as a fitting structure between the connection member 20 and the pipe member 40, including a reinforcing member 30 that is mounted on the outer periphery and a pipe member 40 that is press-fitted to the rear end side of the connection member 20. The structure is applied.

筆記部10は、所謂ボールペンチップであり、先端部が先細状のチップ本体11と、該チップ本体11の最前端部に回動自在に抱持された転写ボール12とを具備している。
この筆記部10内において、転写ボール12よりも後方側には、転写ボール12を前方へ付勢して筆記部10内の先端縁に圧接するスプリング(図示せず)が、必要に応じて設けられる。
The writing unit 10 is a so-called ball-point pen tip, and includes a tip body 11 having a tapered tip and a transfer ball 12 rotatably held at the foremost end of the tip body 11.
In the writing unit 10, a spring (not shown) that urges the transfer ball 12 forward and press-contacts the leading edge in the writing unit 10 is provided on the rear side of the transfer ball 12 as needed. It is done.

チップ本体11は、最前端部に転写ボール12を抱持する先細部11aと、該先細部11aの後方側に連続する大径筒部11bと、該筒部11bの更に後方側に連続する小径筒部11cとから一体に形成され(図1及び図3(a)参照)、内部で軸方向へ連通するインク通路(図示せず)により、後方から供給されるインクを転写ボール12へ導く。   The chip body 11 has a tapered portion 11a that holds the transfer ball 12 at the foremost end, a large-diameter cylindrical portion 11b that continues to the rear side of the tapered detail 11a, and a small diameter that continues to the rear side of the cylindrical portion 11b. The ink supplied from the rear is guided to the transfer ball 12 by an ink passage (not shown) which is integrally formed with the cylinder portion 11c (see FIGS. 1 and 3A) and communicates in the axial direction inside.

前記小径筒部11cは、後述する接続部材20の前端に圧入嵌合される部位であり、その外周面における軸方向の略全長には、凹凸部11c1を有する。
この凹凸部11c1は、多数の微細な凹部および凸部からなり、その凸部に対する凹部の深さは、内在するインクが筆記部10と接続部材20との接続箇所から洩れないように、適宜に設定されている。
The small-diameter cylindrical portion 11c is a portion that is press-fitted into a front end of a connecting member 20 described later, and has an uneven portion 11c1 on substantially the entire axial length of the outer peripheral surface thereof.
The concavo-convex portion 11c1 is composed of a large number of fine concave portions and convex portions, and the depth of the concave portion with respect to the convex portions is appropriately set so that the ink existing does not leak from the connection portion between the writing portion 10 and the connecting member 20. Is set.

この凹凸部11c1は、本実施の形態の好ましい一例によれば、小径筒部11c外周面の表層部を、旋盤等の工作機械により螺旋状に削ることで形成されている。
なお、凹凸部11c1は、多数の微細な凹部および凸部からなるものであればよく、他例としては、梨地状や、その他の形状とすることも可能である。
According to a preferred example of the present embodiment, the concavo-convex portion 11c1 is formed by cutting the surface layer portion of the outer peripheral surface of the small-diameter cylindrical portion 11c into a spiral shape with a machine tool such as a lathe.
In addition, the uneven | corrugated | grooved part 11c1 should just consist of many fine recessed parts and convex parts, and can also be made into a satin-like shape and another shape as another example.

また、接続部材20は、筆記部10と後述するパイプ材40とを、所定間隔を置いて接続する略筒状の部材である。
この接続部材20は、内部を透視可能な合成樹脂材料(例えば透明なポリプロピレン樹脂等)により成形され、その内周面の前端側には、チップ本体11の小径筒部11cを圧入させるための被圧入部21(図1及び図3(a)参照)を形成している。
The connecting member 20 is a substantially cylindrical member that connects the writing unit 10 and a pipe member 40 described later at a predetermined interval.
The connecting member 20 is formed of a synthetic resin material (for example, transparent polypropylene resin) whose inside can be seen through, and a front end of the inner peripheral surface of the connecting member 20 for press-fitting the small-diameter cylindrical portion 11c. A press-fit portion 21 (see FIGS. 1 and 3A) is formed.

被圧入部21は、小径筒部11cを圧入嵌合させるように、該小径筒部11cの外径よりも若干小径に形成された孔であり、その内周面の表層部には凹凸部21aを有する。
この凹凸部21aは、多数の微細な凹部および凸部からなり、上述したチップ本体11の凹凸部11c1と略同様に螺旋状に形成されていてもよいし、あるいは梨地状や他の形状の凹凸部であってもよい。
この凹凸部21aにおいて、凸部に対する凹部の深さは、内在するインクが筆記部10と接続部材20との接続箇所から洩れないように、適宜に設定されている。
The press-fit portion 21 is a hole formed to have a diameter slightly smaller than the outer diameter of the small-diameter cylindrical portion 11c so that the small-diameter cylindrical portion 11c is press-fitted, and the uneven portion 21a is formed on the surface layer portion of the inner peripheral surface thereof. Have
The concavo-convex portion 21a is composed of a large number of fine concave and convex portions, and may be formed in a spiral shape in substantially the same manner as the concavo-convex portion 11c1 of the chip body 11 described above, or may have a satin or other shape. Part.
In the concavo-convex portion 21 a, the depth of the concave portion with respect to the convex portion is appropriately set so that the ink existing does not leak from the connection portion between the writing portion 10 and the connecting member 20.

また、接続部材20の外周面には、前端側から順に、補強部材30を嵌合させるための補強部材被嵌合部22、内部を視認可能にする透視部23、パイプ材40を嵌合させるためのパイプ材被嵌合部24が形成されている。   Further, on the outer peripheral surface of the connecting member 20, a reinforcing member fitted portion 22 for fitting the reinforcing member 30 in order from the front end side, a see-through portion 23 that makes the inside visible, and a pipe material 40 are fitted. For this purpose, a pipe material fitted portion 24 is formed.

補強部材被嵌合部22は、後述する筒状の補強部材30を環装させるように形成された筒状の部位であり、その外周面には複数の縦リブ22a(図2参照)を有する。
各縦リブ22aは、接続部材20の最前端部よりも若干後方側の位置から、透視部23の前端部までにわたるリブであり、環状に装着される補強部材30を、その内周面側から押圧するように遠心方向へ突出している。
各縦リブ22aの前端部には、補強部材30をスムーズに環装させるように、面取り部22a1が設けられている。この面取り部22a1は、図示例によれば所謂R面取り状に形成されるが、C面取り状であってもよい。
The reinforcing member fitted portion 22 is a cylindrical portion formed so as to wrap a cylindrical reinforcing member 30 to be described later, and has a plurality of vertical ribs 22a (see FIG. 2) on the outer peripheral surface thereof. .
Each of the vertical ribs 22a is a rib extending from a position slightly rearward of the front end portion of the connecting member 20 to the front end portion of the see-through portion 23, and the reinforcing member 30 attached in an annular shape is connected to the inner peripheral surface side thereof. It protrudes in the centrifugal direction to press.
A chamfered portion 22a1 is provided at the front end of each vertical rib 22a so that the reinforcing member 30 can be smoothly wrapped. The chamfered portion 22a1 is formed in a so-called R chamfer shape according to the illustrated example, but may be a C chamfer shape.

そして、この縦リブ22aは、図示例によれば、補強部材被嵌合部22の周方向において等間隔に四つ配設される。
また、補強部材被嵌合部22において、複数の縦リブ22aよりも前端側の部分は、補強部材30の内径よりも若干小さい外径に形成されることで、補強部材30をスムーズに環装させるための案内筒部22bを構成している。この案内筒部22bの最前端部には、補強部材30をスムーズに環装させるように、面取り部22b1が形成される。この面取り部22a1は、図示例によれば所謂C面取り状に形成されるが、R面取り状であってもよい。
And according to the example of illustration, this vertical rib 22a is arrange | positioned by four at equal intervals in the circumferential direction of the reinforcement member fitting part 22. FIG.
Further, in the reinforcing member fitted portion 22, the front end portion of the plurality of vertical ribs 22 a is formed to have an outer diameter slightly smaller than the inner diameter of the reinforcing member 30, so that the reinforcing member 30 can be smoothly mounted. The guide cylinder part 22b for making it comprise is comprised. A chamfered portion 22b1 is formed at the foremost end portion of the guide tube portion 22b so that the reinforcing member 30 can be smoothly wrapped. The chamfered portion 22a1 is formed in a so-called C chamfered shape according to the illustrated example, but may be formed in an R chamfered shape.

また、透視部23は、接続部材20に対し軸方向の両側から接続される筆記部10とパイプ材40との間に位置する部位であり、その内周面側および外周面側に、筆記部10や、補強部材30、パイプ材40等が重ならないようにしている。
したがって、この透視部23によれば、その内部にインクが有るか無いかを、外部から視認することができる。
Further, the see-through portion 23 is a portion located between the writing portion 10 and the pipe member 40 connected to the connection member 20 from both sides in the axial direction, and the writing portion is provided on the inner peripheral surface side and the outer peripheral surface side thereof. 10, the reinforcing member 30, the pipe material 40, and the like are not overlapped.
Therefore, according to this see-through part 23, it can be visually recognized from outside whether ink is present or not.

なお、この透視部23は、図示例によれば、その外周面をフラットな表面としているが、他の好ましい一例としては、同外周面を凸曲状の表面としてもよく、この構成によれば、凸曲状の表面のレンズ効果により、内部のインクの有無をより鮮明に視認させることができる。   According to the illustrated example, the outer peripheral surface of the see-through portion 23 is a flat surface. However, as another preferable example, the outer peripheral surface may be a convex curved surface. By virtue of the lens effect on the convex curved surface, it is possible to make the presence or absence of ink inside clearer.

また、パイプ材被嵌合部24は、接続部材20における後側に配置される部位であり、パイプ材40の内周面によって圧接される環状凸部24a、該環状凸部24aよりも圧入方向側(換言すれば筆記部10側)に配置された環状凹部24b、該環状凸部24aよりもパイプ材40側に配置された環状案内部24c等を有する。   The pipe material fitted portion 24 is a portion disposed on the rear side of the connection member 20, and is an annular convex portion 24 a that is press-contacted by the inner peripheral surface of the pipe material 40, and a press-fit direction from the annular convex portion 24 a. It has an annular recess 24b disposed on the side (in other words, the writing unit 10 side), an annular guide 24c disposed on the pipe material 40 side relative to the annular projection 24a, and the like.

環状凸部24aは、略筒状に形成された部位であり、その外径が、パイプ材40の内周面よりも若干大きく設定されている。
この環状凸部24aの前端と後述する環状凹部24bとの間には、環状凸部24aから環状凹部24bにかけて外径を徐々に縮径するように、縮径傾斜部24dが形成されている。
The annular convex portion 24 a is a portion formed in a substantially cylindrical shape, and the outer diameter thereof is set slightly larger than the inner peripheral surface of the pipe material 40.
A reduced diameter inclined portion 24d is formed between the front end of the annular convex portion 24a and an annular concave portion 24b described later so that the outer diameter is gradually reduced from the annular convex portion 24a to the annular concave portion 24b.

また、環状凹部24bは、環状凸部24aよりも若干小径の略筒状に形成される。
この環状凹部24bの外径および軸方向の長さは、パイプ材40が圧入された際に発生する削り屑を該環状凹部24bとパイプ材40内周面との間に内在するように、適宜に設定されている。
The annular recess 24b is formed in a substantially cylindrical shape having a slightly smaller diameter than the annular projection 24a.
The outer diameter and the axial length of the annular recess 24b are appropriately set so that shavings generated when the pipe material 40 is press-fitted are present between the annular recess 24b and the inner peripheral surface of the pipe material 40. Is set to

また、環状案内部24cは、環状凸部24aよりも若干小径であって、且つパイプ材40の内径よりも若干小径の略筒状に形成される。
この環状案内部24cと上記環状凸部24aとの間には、環状案内部24cから環状凸部24aにかけて外径が徐々に拡大される拡径傾斜部24eが形成されている。
Further, the annular guide portion 24 c is formed in a substantially cylindrical shape having a slightly smaller diameter than the annular convex portion 24 a and a slightly smaller diameter than the inner diameter of the pipe material 40.
Between the annular guide portion 24c and the annular convex portion 24a, an enlarged diameter inclined portion 24e is formed in which the outer diameter gradually increases from the annular guide portion 24c to the annular convex portion 24a.

なお、本実施の形態の好ましい一例によれば、パイプ材被嵌合部24における外径は、環状凸部24aが最も大きく、環状凹部24bが次に大きく、環状案内部24cが最も小さく設定される。すなわち、環状凸部24aの外径>環状凹部24bの外径>環状案内部24cの外径という関係になっている。
この構成によれば、パイプ材40の保持力を十分に得られる上、パイプ材40を接続部材20に対し環状に挿入する際の作業性も良好である。
According to a preferred example of the present embodiment, the outer diameter of the pipe material fitted portion 24 is set so that the annular convex portion 24a is the largest, the annular concave portion 24b is the next largest, and the annular guide portion 24c is the smallest. The That is, the outer diameter of the annular convex portion 24a> the outer diameter of the annular concave portion 24b> the outer diameter of the annular guide portion 24c.
According to this configuration, the holding force of the pipe member 40 can be sufficiently obtained, and the workability when the pipe member 40 is inserted into the connection member 20 in an annular shape is good.

更に、前記環状案内部24cの後端部には、パイプ材40がスムーズに環装されるように全周にわたる面取り部24fが形成されている。この面取り部24fは、図示例によれば所謂C面取り状に形成されるが、他例としてはR面取り状であってもよい。   Further, a chamfered portion 24f is formed at the rear end portion of the annular guide portion 24c so as to smoothly wrap the pipe material 40. According to the illustrated example, the chamfered portion 24f is formed in a so-called C chamfered shape, but may be an R chamfered shape as another example.

また、補強部材30は、金属材料からなる薄肉円筒状の部材であり、その最前端部に、求心方向へカシメられた位置決め部31(図3(b)参照)を有する。この位置決め部31は、補強部材30が接続部材20の補強部材被嵌合部22に環装された際に、補強部材被嵌合部22の前端縁に当接されて位置決めされる部分である。   The reinforcing member 30 is a thin cylindrical member made of a metal material, and has a positioning portion 31 (see FIG. 3B) that is caulked in the centripetal direction at the foremost end portion. The positioning portion 31 is a portion that is positioned in contact with the front end edge of the reinforcing member fitted portion 22 when the reinforcing member 30 is mounted on the reinforcing member fitted portion 22 of the connection member 20. .

また、パイプ材40は、金属材料(例えばステンレス等)からな薄肉円筒状の長尺部材である。
本実施の形態の好ましい一例であるパイプ材40では、外形が2.9mm、内径が2.6〜2.7mm、肉厚が0.1〜0.2となるように形成してある。
このパイプ材40は、当該ボールペン用リフィールAが組み立てられた後、図示しないインクが充填されることで、インク収容管として機能する。
The pipe member 40 is a thin cylindrical long member made of a metal material (for example, stainless steel).
In the pipe material 40 which is a preferable example of the present embodiment, the outer shape is 2.9 mm, the inner diameter is 2.6 to 2.7 mm, and the wall thickness is 0.1 to 0.2.
The pipe material 40 functions as an ink storage tube by being filled with ink (not shown) after the ballpoint pen refill A is assembled.

前記インクは、所謂剪断減粘性インクであり、この剪断減粘性インクは、通常の油性インクと比較して、筆記部10先端からの吐出量が多い。
そのため、本実施の形態の一例では、パイプ材40を比較的薄肉な金属材料とすることで、パイプ材40内の容量を同外形の合成樹脂性パイプ材の場合よりも大きくし、パイプ材40内に収容されるインク量を多くしている。
なお、本実施の形態の好ましい一例によれば、前述したように剪断減粘性インクを用いるようにしているが、他例としては、油性インク等の剪断減粘性インク以外のインクを用いることも可能である。
The ink is a so-called shear-thinning ink, and this shear-thinning ink has a larger discharge amount from the tip of the writing unit 10 than a normal oil-based ink.
Therefore, in an example of the present embodiment, the pipe material 40 is made of a relatively thin metal material, so that the capacity in the pipe material 40 is larger than that in the case of the synthetic resin pipe material having the same outer shape. The amount of ink stored in the inside is increased.
In addition, according to a preferred example of the present embodiment, the shear thinning ink is used as described above, but as another example, it is possible to use an ink other than the shear thinning ink such as oil-based ink. It is.

次に、上述したリフィール構成部材を組み立てる際における本発明の特徴について、詳細に説明する。
図3は、接続部材20に対し、筆記部10と補強部材30を組み付けている状態を順次に示している。
先ず、図3(a)(b)に示すように、接続部材20前端側の被圧入部21に対し、筆記部10の小径筒部11cが圧入嵌合される。
この嵌合状態では、接続部材20側の凹凸部21aと、筆記部10側の凹凸部11c1とが径方向において圧接し合い、その圧接による摩擦抵抗により、筆記部10が接続部材20から抜けてしまうのを防ぐことができる。
Next, the features of the present invention when assembling the above-mentioned refill component will be described in detail.
FIG. 3 sequentially shows a state in which the writing unit 10 and the reinforcing member 30 are assembled to the connection member 20.
First, as shown in FIGS. 3A and 3B, the small-diameter cylindrical portion 11 c of the writing portion 10 is press-fitted into the press-fit portion 21 on the front end side of the connecting member 20.
In this fitted state, the uneven portion 21a on the connection member 20 side and the uneven portion 11c1 on the writing portion 10 side are in pressure contact with each other in the radial direction, and the writing portion 10 comes out of the connection member 20 due to frictional resistance due to the pressure contact. Can be prevented.

そして、図3(b)(c)に示すように、筆記部10が挿入された接続部材20前端側外周の補強部材被嵌合部22に、補強部材30が環装される。
この際、補強部材30は、その内周面を、面取り部22b1、案内筒部22b、及び面取り部22a1に沿わせることで、スムーズに環装される。そして、その環装状態において、補強部材30は、補強部材被嵌合部22外周の複数の縦リブ22aを求心方向へ押圧する。
Then, as shown in FIGS. 3B and 3C, the reinforcing member 30 is wrapped around the reinforcing member fitted portion 22 on the outer periphery on the front end side of the connecting member 20 in which the writing portion 10 is inserted.
At this time, the reinforcing member 30 is smoothly mounted by having its inner peripheral surface along the chamfered portion 22b1, the guide tube portion 22b, and the chamfered portion 22a1. Then, in the mounted state, the reinforcing member 30 presses the plurality of vertical ribs 22a on the outer periphery of the reinforcing member fitted portion 22 in the centripetal direction.

そのため、接続部材20の前端側は、弾性的に求心方向へ収縮し、内在する筆記部10を締め付ける。
よって、筆記部10は、前記補強部材30の作用によっても、接続部材20から抜けてしまうようなことを防止され、その上、筆圧等により径方向へがたついたり、ぐらついたりするようなことも防止される。
Therefore, the front end side of the connection member 20 is elastically contracted in the centripetal direction and tightens the writing unit 10 that is present.
Therefore, the writing unit 10 is prevented from coming off from the connection member 20 even by the action of the reinforcing member 30. Moreover, the writing unit 10 is wobbled or wobbled in the radial direction due to writing pressure or the like. This is also prevented.

また、図4および図5は、パイプ材被嵌合部24に対し、パイプ材40を環装させる際の作用効果を順次に示している。
先ず、図4(a)に示すように、パイプ材40は、パイプ材被嵌合部24後端側の面取り部24fおよび環状案内部24cに沿って、スムーズに環装されてゆく。
そして、パイプ材40は、その最前端縁を、拡径傾斜部24eに突き当てる。
すると、パイプ材40は、拡径傾斜部24eに沿って弾性的に若干だけ拡径され、その拡径状態のまま、最前端の縁部により環状凸部24aの表層部を削り始める。この際に発生する削り屑xは、パイプ材40が拡径傾斜部24eにより若干拡径されるため、比較的小さなものとなる。
そして、この削り屑xは、図4(b)に示すように、前進するパイプ材40の前端面に押されて、前方へ移動してゆく。
4 and 5 sequentially show the operational effects when the pipe material 40 is mounted on the pipe material fitted portion 24.
First, as shown in FIG. 4A, the pipe material 40 is smoothly wrapped along the chamfered portion 24 f and the annular guide portion 24 c on the rear end side of the pipe material fitted portion 24.
And the pipe material 40 abuts the foremost end edge on the enlarged diameter inclined portion 24e.
Then, the pipe material 40 is elastically slightly expanded in diameter along the diameter-increasing inclined portion 24e, and starts to scrape the surface layer portion of the annular convex portion 24a with the edge at the foremost end while maintaining the expanded diameter state. The shavings x generated at this time is relatively small because the pipe material 40 is slightly enlarged in diameter by the enlarged diameter inclined portion 24e.
Then, as shown in FIG. 4B, the shavings x is pushed by the front end face of the pipe material 40 moving forward and moves forward.

そして、前方へ移動中の削り屑xは、図5(c)に示すように、縮径傾斜部24dを通過中に、該縮径傾斜部24dに沿うようにして、求心方向へも移動することになる。
その後、削り屑xは、パイプ材40の前進に伴って、該パイプ材40内周面と環状凹部24b外周面との間に挟まれてゆく。
Then, as shown in FIG. 5C, the shavings x moving forward moves in the centripetal direction along the reduced diameter inclined portion 24d while passing through the reduced diameter inclined portion 24d. It will be.
Thereafter, the shavings x are sandwiched between the inner peripheral surface of the pipe material 40 and the outer peripheral surface of the annular recess 24b as the pipe material 40 advances.

そして、パイプ材40が接続部材20の透視部23に当接した状態では、図5に示すように、パイプ材40内周面と、環状凹部24b外周面との間に、削り屑xが内在された状態となる。
この状態では、パイプ材40が、拡径傾斜部24eの作用により若干拡径した状態で、その内周面を環状凸部24aの外周面に圧接しているため、これら内外周面の間からインクが洩れるようなことを防ぐことができる上、パイプ材40と接続部材20との接続強度も十分に得ることができる。
しかも、削り屑xが外部へ飛散してしまうようなことを、防ぐことができる。
And in the state which the pipe material 40 contact | abutted to the see-through | perspective part 23 of the connection member 20, as shown in FIG. 5, the shavings x exist between the pipe material 40 inner peripheral surface and the annular recessed part 24b outer peripheral surface. It will be in the state.
In this state, the pipe material 40 is slightly expanded in diameter by the action of the enlarged diameter inclined portion 24e, and its inner peripheral surface is pressed against the outer peripheral surface of the annular convex portion 24a. In addition to preventing ink from leaking, the connection strength between the pipe member 40 and the connection member 20 can be sufficiently obtained.
Moreover, it is possible to prevent the shavings x from being scattered outside.

なお、図示例によれば、パイプ材40の最前端部を平坦状に形成しているが、この前端部の内周面側には、接続部材20への環装作業を容易にするために、必要に応じて、面取り加工が施される場合がある。
このような場合、特に肉厚が比較的薄いパイプ材に前記のような面取り加工を施した場合には、そのパイプ材の端部が軸方向に沿う断面上においてエッジ状となり、上記削り屑xの発生がより多くなる可能性がある。
しかしながら、上記構成によれば、前記のような面取り加工によるエッジを形成した場合であっても、削り屑xをパイプ材40内周面と環状凹部24bとの間に収容することで、削り屑xの飛散を防ぎ、品質上の問題を回避することができる。
In addition, according to the example of illustration, although the foremost end part of the pipe material 40 is formed in flat shape, in order to make the surrounding work to the connection member 20 easy on the inner peripheral surface side of this front end part. If necessary, chamfering may be performed.
In such a case, in particular, when the pipe material having a relatively small thickness is chamfered as described above, the end of the pipe material has an edge shape on the cross section along the axial direction, and the shavings x May occur more frequently.
However, according to the said structure, even if it is a case where the edge by the above-mentioned chamfering process is formed, by storing the shavings x between the pipe material 40 inner peripheral surface and the annular recessed part 24b, shavings It is possible to prevent scattering of x and avoid quality problems.

また、仮に、縮径傾斜部24dを省いた構成、すなわち環状凸部24aから環状凹部24bに段状に縮径される構成とした場合には、削り屑xがパイプ材40内周面と環状凹部24bとの間に挟まれ難くなり、その削り屑xが外部へ飛散し易くなる。   Further, if the configuration is such that the diameter-decreasing inclined portion 24d is omitted, that is, the configuration in which the diameter is reduced stepwise from the annular convex portion 24a to the annular concave portion 24b, the shavings x is annular with the inner peripheral surface of the pipe material 40. It becomes difficult to be pinched between the recesses 24b, and the shavings x are easily scattered to the outside.

また、上記実施の形態は、本発明に係わる接続構造を、ボールペン用リフィールAにおいて筆記部10を接続部材20に圧入嵌合させる箇所に適用した一例であるが、他例としては、略同様の接続構造を、他の構成のボールペン用リフィールや、シャープペンシル用リフィールにおいて筆記部を圧入嵌合させる箇所に適用することが可能である。   Moreover, although the said embodiment is an example which applied the connection structure concerning this invention to the location which press-fits the writing part 10 in the connection member 20 in the refill A for ball-point pens, as other examples, it is substantially the same. The connection structure can be applied to a place where a writing part is press-fitted and fitted in a ball pen refill of another configuration or a mechanical pencil refill.

本発明に係わる接続構造を適用したボールペン用リフィールの一例を示す断面図である。It is sectional drawing which shows an example of the refill for ball-point pens which applied the connection structure concerning this invention. 接続部材の一例を示す平面図である。It is a top view which shows an example of a connection member. 接続部材に対し筆記部と補強部材を装着する手順を示す断面図であり、(a)は筆記部を接続する前の状態を示し、(b)は筆記部が接続された状態を示し、(c)は補強部材が接続された状態を示す。It is sectional drawing which shows the procedure which attaches a writing part and a reinforcement member with respect to a connection member, (a) shows the state before connecting a writing part, (b) shows the state where the writing part was connected, ( c) shows a state where the reinforcing member is connected. 接続部材に対しパイプ材を嵌合させる手順を示す拡大断面図であり、(a)は嵌合前の状態を示し、(b)は嵌合途中の状態を示す。It is an expanded sectional view which shows the procedure which fits a pipe material with respect to a connection member, (a) shows the state before fitting, (b) shows the state in the middle of fitting. 接続部材に対しパイプ材を嵌合させる手順を示す拡大断面図であり、(a)は嵌合途中の状態を示し、(b)は嵌合後の状態を示す。It is an expanded sectional view which shows the procedure which fits a pipe material with respect to a connection member, (a) shows the state in the middle of fitting, (b) shows the state after fitting.

10:筆記部
11:チップ本体
11c1:凹凸部
20:接続部材(筒状部材)
21:被圧入部
21a:凹凸部
22:補強部材被嵌合部
24a:環状凸部
24b:環状凹部
24c:環状案内部
24:パイプ材被嵌合部
30:補強部材
40:パイプ材
A:ボールペン用リフィール
x:削り屑
10: Writing part 11: Chip body 11c1: Concavity and convexity 20: Connection member (tubular member)
21: Press-fit portion 21a: Concavity and convexity portion 22: Reinforcing member fitted portion 24a: Annular convex portion 24b: Annular concave portion 24c: Annular guide portion 24: Pipe material fitted portion 30: Reinforcing member 40: Pipe material A: Ballpoint pen Refill x: shavings

Claims (4)

  1. 筆記部を筒状部材の前端に圧入嵌合するようにした筆記部の接続構造であって、
    前記圧入嵌合の箇所において径方向に圧接し合う面の内の一方または双方に、多数の微細な凹凸部を設け
    前記圧入嵌合の箇所の外周に、筒状の補強部材被嵌合部が形成され、この補強部材被嵌合部には、筒状の補強部材が環状に装着され、
    前記補強部材被嵌合部の外周面には、前記補強部材をその内周面側から押圧するように複数の縦リブが、周方向に等間隔を置いて設けられ、
    前記補強部材には、前記筆記部の外周部を直接押圧する部分がないことを特徴とする筆記部の接続構造。
    A writing part connection structure in which the writing part is press-fitted to the front end of the tubular member,
    A number of fine irregularities are provided on one or both of the surfaces that are press-contacted in the radial direction at the place of the press-fitting ,
    A cylindrical reinforcing member fitted portion is formed on the outer periphery of the press-fitting portion, and a cylindrical reinforcing member is annularly attached to the reinforcing member fitted portion,
    A plurality of vertical ribs are provided at equal intervals in the circumferential direction on the outer peripheral surface of the reinforcing member fitted portion so as to press the reinforcing member from the inner peripheral surface side thereof,
    The connecting structure for a writing portion, wherein the reinforcing member does not have a portion that directly presses the outer peripheral portion of the writing portion.
  2. 前記補強部材被嵌合部は、その前方から前記補強部材を環状に装着するように形成され、
    前記複数の縦リブは、前記補強部材被嵌合部の前端部よりも若干後方向側の位置から後方へわたって設けられ、
    前記補強部材被嵌合部における前記複数の縦リブよりも前端側の部分は、前記補強部材の内径よりも若干小さい外径に形成されていることを特徴とする請求項1記載の筆記部の接続構造。
    The reinforcing member fitted portion is formed so as to attach the reinforcing member annularly from the front,
    The plurality of vertical ribs are provided to extend rearward from a position slightly rearward of the foremost end of the reinforcing member fitted portion,
    2. The writing part according to claim 1, wherein a portion of the reinforcing member fitted portion on the front end side of the plurality of vertical ribs is formed to have an outer diameter slightly smaller than an inner diameter of the reinforcing member. Connection structure.
  3. 前記多数の微細な凹凸部が、前記圧入嵌合の箇所において径方向に圧接し合う双方の面に、それぞれ螺旋状に設けられていることを特徴とする請求項1又は2記載の筆記部の接続構造。 3. The writing part according to claim 1, wherein the plurality of fine uneven parts are respectively provided in a spiral shape on both surfaces that are pressed against each other in a radial direction at the press-fitting portion. Connection structure.
  4. 前記筆記部の後部側に、前記筒状部材として合成樹脂製の接続部材を圧入嵌合し、該接続部材の後部側に対し、金属製のパイプ材を環状に圧入嵌合するようにした接続構造であって、
    前記接続部材に、前記パイプ材の内径よりも外径が大きい環状凸部と、該環状凸部よりも前記筆記部側に配置されるとともに前記環状凸部よりも外径の小さい環状凹部とを設け、
    前記圧入嵌合の際に前記環状凸部の表層部が前記パイプ材の最前端の縁部により削られて発生した削り屑を、前記環状凹部と前記パイプ材内周面との間に内在するようにしたことを特徴とする請求項1乃至3何れか1項記載の筆記部の接続構造。
    A connection made by press-fitting a synthetic resin connecting member as the cylindrical member to the rear side of the writing part, and a metal pipe material annularly press-fitting to the rear side of the connecting member Structure,
    An annular protrusion having an outer diameter larger than the inner diameter of the pipe member and an annular recess having an outer diameter smaller than that of the annular protrusion and disposed on the writing part side of the annular protrusion. Provided,
    Shavings generated by the surface layer portion of the annular convex portion being scraped by the edge of the foremost end of the pipe material during the press-fitting fit between the annular concave portion and the inner peripheral surface of the pipe material. 4. The writing part connection structure according to claim 1, wherein the connecting structure is a writing part.
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