JP2010076411A - Method for manufacturing ballpoint pen tip - Google Patents

Method for manufacturing ballpoint pen tip Download PDF

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Publication number
JP2010076411A
JP2010076411A JP2008304187A JP2008304187A JP2010076411A JP 2010076411 A JP2010076411 A JP 2010076411A JP 2008304187 A JP2008304187 A JP 2008304187A JP 2008304187 A JP2008304187 A JP 2008304187A JP 2010076411 A JP2010076411 A JP 2010076411A
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coil spring
ball
tip
ball holder
hole
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JP2008304187A
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JP5187165B2 (en
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Shunichiro Machida
俊一郎 町田
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Pentel Co Ltd
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Pentel Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enable a ball to be securely pressed by achieving such a structure that the tip of a coil spring and a portion hooked on a wall surface connecting a back hole of a ball holder and an ink distribution hole are separated, and also the tip of the coil spring is shifted forward along the wall surface connecting the back hole of the ball holder and the ink distribution hole to be inserted into the ink distribution hole by rotating the coil spring inserted in the ball holder and subjected to the retreat restriction about the axis of the coil spring. <P>SOLUTION: A method for manufacturing a ball-point pen tip includes: inserting the coil spring for forward pushing the ball as a writing member into the ball holder; providing the coil spring with the retreat restriction; and then rotating the coil spring about the axis of the coil spring. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、少なくとも筆記部材としてのボールと、このボールを先端開口部より一部突出した状態で回転自在に抱持するボールホルダーとからなるボールペンチップの、ボールを突出方向に付勢するコイルスプリングを備えるボールペンチップの製造方法に関する。   The present invention relates to a coil spring for urging a ball in a protruding direction of a ballpoint pen tip comprising at least a ball as a writing member and a ball holder that rotatably holds the ball in a state in which the ball partially protrudes from a tip opening. The present invention relates to a method for manufacturing a ballpoint pen tip.

従来より、ボールペンチップ内のインキが乾燥することによる筆記不能や、不使用時にボールとボールホルダーとの隙間からインキが漏れだすことを防止するために、ボールホルダーの内部から弾撥するコイルスプリングにてボール先端側に付勢し、ボールをボールホルダーの内壁に周状に当接させて、ボールとボールホルダーとの隙間を密閉するものが知られているが、スプリングの挿入性が良いものとするために、チップ先端に形成したボール抱持室の底壁の中央にインキ流通孔と、該インキ流通孔に連通し、チップ後端開口部に延びるバック穴に貫通する放射状に延びた放射状溝を形成後、前記バック穴とインキ流通孔を繋ぐ壁面を、押圧ツールによって押圧加工、または切削ツールで切削加工し、放射状溝を形成する際に生じるバリを平坦状に形成する工程を設けるボールペンチップの製造方法が開示されている(特許文献1)。
特開2003−170691号公報
Conventionally, a coil spring that repels from the inside of the ball holder to prevent ink from being written due to drying of the ink in the ballpoint pen tip and ink leakage from the gap between the ball and the ball holder when not in use. It is known that the ball is urged toward the tip of the ball and the ball is brought into circumferential contact with the inner wall of the ball holder to seal the gap between the ball and the ball holder. In order to achieve this, an ink circulation hole is formed in the center of the bottom wall of the ball holding chamber formed at the tip of the chip, and a radial groove extending radially through the back hole that communicates with the ink circulation hole and extends to the rear end opening of the chip. After forming, the wall surface connecting the back hole and the ink circulation hole is pressed with a pressing tool or cut with a cutting tool to form burrs. Ballpoint pen tip manufacturing method of providing a step of forming a flat shape has been disclosed (Patent Document 1).
JP 2003-170691 A

特許文献1に開示されている発明は、コイルスプリングの直接ボールを押す部分となるコイルスプリング先端部分が、ボールホルダーの内孔に引っかかってボールを押さない状態で設置されないように、前記放射状溝を形成する際に発生するバリを平坦状に形成したり、バック穴とインキ流通孔を繋ぐ壁面の角度を調整するものであるが、コイルスプリングのコイル部分の軸心に対してコイルスプリング先端部の軸心が傾いてしまうことがあり、コイルスプリング先端が、バック穴とインキ流通孔を繋ぐ壁面に引っかかってしまうことがあった。   In the invention disclosed in Patent Document 1, the tip of the coil spring that directly presses the ball of the coil spring is arranged so that the radial groove is not installed in a state where it is caught in the inner hole of the ball holder and does not press the ball. The burr generated when forming is formed in a flat shape, or the angle of the wall surface connecting the back hole and the ink circulation hole is adjusted, but the coil spring tip part with respect to the axis of the coil part of the coil spring is adjusted. The shaft center may be inclined, and the tip of the coil spring may be caught on the wall surface connecting the back hole and the ink circulation hole.

即ち、本発明は、筆記部材としてのボールを前方付勢するコイルスプリングをボールホルダー内に挿入し、前記コイルスプリングに後退規制を施した後に、コイルスプリングをコイルスプリングの軸心に対して回転させるボールペンチップの製造方法を要旨とする。   That is, according to the present invention, a coil spring that biases the ball as a writing member forward is inserted into the ball holder, and after the retraction restriction is applied to the coil spring, the coil spring is rotated with respect to the axis of the coil spring. The gist of the manufacturing method of the ballpoint pen tip.

本発明は、コイルスプリングをボールホルダー内に挿入し、前記コイルスプリングに後退規制を施した後に、コイルスプリングをコイルスプリングの軸心に対して回転させる製造方法であることで、コイルスプリング先端と、ボールホルダーのバック穴とインキ流通孔を繋ぐ壁面に引っかかっていた部分とが離れると共に、コイルスプリングの弾撥力によってコイルスプリング先端が前記壁面に沿って前方へ移動し、前記インキ流通孔に挿入されるので、引っかかりが解消され、ボールを確実押圧することができる。   The present invention is a manufacturing method in which a coil spring is inserted into a ball holder, and after the coil spring is subjected to retraction restriction, the coil spring is rotated with respect to the axial center of the coil spring. The back hole of the ball holder and the part hooked on the wall surface connecting the ink circulation hole are separated from each other, and the tip of the coil spring moves forward along the wall surface due to the elastic force of the coil spring and is inserted into the ink circulation hole. Therefore, the catch is eliminated and the ball can be pressed reliably.

本発明のボールペンの製造方法は、コイルスプリングをボールホルダー内に挿入し、前記コイルスプリングに後退規制を施した後に、コイルスプリングをコイルスプリングの軸心に対して回転させるものである。
ボールホルダーの後端の内面に突起部をボールホルダーの軸心方向に向かって形成させ、その突起部をコイルスプリングのコイル部の線径の間に嵌合させたり、ボールホルダー後
方に別部材を接続し、別部材の内孔に設けられた段部によってコイルスプリングの後退規制をした後に、ボールペンホルダー内のコイルスプリングの後方から治具を挿入させ、治具の外径と、コイルスプリングの内径とで仮圧入状態とした後に、コイルスプリングをコイルスプリングの軸心に対して回転させる方法や、コイルスプリングの後端側の一部分をボールホルダーや別部材の後端側に露出させ、その露出部分に治具をチャッキングさせて回転させる方法などがある。いずれにしても、コイルスプリングをボールホルダー内に挿入し、前記コイルスプリングに後退規制を施した後に、コイルスプリングをコイルスプリングの軸心に対して回転させることが肝要であり、その具体的方法については後述する。尚、コイルスプリングの後方から挿入させた治具を弾性体で形成したり、コイル内径よりも僅かに小径の先端部を有し、その先端部の中央に後端まで貫通した中孔部を設けるとともに、先端部に前記中孔部に連通している溝部を、中心部から外側に向かって放射状に形成したチャック治具をコイルスプリング内部に挿入した後に、チャック治具の中孔部に中孔部の径よりも大きい直径の棒体を挿入させて、チャック治具先端を拡径させてコイルスプリングの内面に仮圧入させるとボールペンホルダー内のコイルスプリングの内径のばらつきがあっても確実に回転させることができるため好ましい。
In the ballpoint pen manufacturing method of the present invention, a coil spring is inserted into a ball holder, and after the coil spring is subjected to retraction restriction, the coil spring is rotated with respect to the axis of the coil spring.
A protrusion is formed on the inner surface of the rear end of the ball holder toward the axial center of the ball holder, and the protrusion is fitted between the wire diameters of the coil portions of the coil spring. After connecting and restricting the retraction of the coil spring by the step provided in the inner hole of another member, the jig is inserted from the rear of the coil spring in the ballpoint pen holder, and the outer diameter of the jig and the inner diameter of the coil spring are inserted. After the temporary press-fit state, the coil spring is rotated with respect to the axis of the coil spring, or a part of the rear end side of the coil spring is exposed to the rear end side of the ball holder or another member. There is a method of chucking and rotating the jig. In any case, it is important to insert the coil spring into the ball holder, and after the retraction restriction is applied to the coil spring, it is important to rotate the coil spring with respect to the axis of the coil spring. Will be described later. The jig inserted from the rear of the coil spring is formed of an elastic body, or has a tip portion slightly smaller than the inner diameter of the coil, and a middle hole portion penetrating to the rear end is provided at the center of the tip portion. In addition, after inserting a chuck jig in which a groove portion communicating with the middle hole portion at the tip portion is formed radially outward from the center portion into the coil spring, the middle hole is formed in the middle hole portion of the chuck jig. By inserting a rod with a diameter larger than the diameter of the part, expanding the tip of the chuck jig and temporarily press-fitting it into the inner surface of the coil spring, it will rotate reliably even if the inner diameter of the coil spring in the ballpoint pen holder varies. It is preferable because it can be used.

コイルスプリングの軸心に対する回転方向や、回転角度は、前方へのコイルスプリングの弾撥力によって、コイルスプリング先端が前記壁面に沿って前方へ移動し、前記インキ流通孔に挿入された後、再びバック穴とインキ流通孔を繋ぐ壁面に引き戻されることが無いことから適宜選択できる。   The rotation direction and rotation angle with respect to the axial center of the coil spring are determined again after the coil spring tip moves forward along the wall surface and is inserted into the ink circulation hole by the elastic force of the coil spring forward. It can be appropriately selected because it is not pulled back to the wall surface connecting the back hole and the ink circulation hole.

コイルスプリングは、少なくとも弾撥力を有するコイル部を備わっていれば良く、ボールを押圧する部分をストレート状態にしたり、弾撥作用をなすコイル部分の外径よりも小径なコイルスプリングにしても良い。また、コイルスプリングを回転させやすくするためにボールホルダー又は、ボールホルダーとインキ収容管とをつなぐ別部材よりも後方にコイルスプリングの一部を露出させたり、また同様の目的でコイルスプリングの後端側を弾撥作用をなすコイル部分の外径よりも小径や大径としたり、座巻き部を形成したり、コイルスプリング線径を延出させたストレート状とすることも適宜可能である。更に、コイルスプリングの素材に関して限定はされないが、インキに侵され難いステンレス鋼線やニッケルメッキ鋼線などの不鋳鋼や不鋳処理を施したものも使用することができる。   The coil spring only needs to have at least a coil portion having a resilience, and the portion that presses the ball may be in a straight state or may be a coil spring having a smaller diameter than the outer diameter of the coil portion that performs a resilience action. . Also, in order to make the coil spring easier to rotate, a part of the coil spring is exposed behind the ball holder or another member that connects the ball holder and the ink containing tube, or the rear end of the coil spring for the same purpose. It is also possible to appropriately make the side smaller or larger than the outer diameter of the coil portion that performs an elastic action, form a coiled portion, or have a straight shape with an extended coil spring wire diameter. Furthermore, although there is no limitation regarding the material of the coil spring, non-cast steel such as stainless steel wire or nickel-plated steel wire which is not easily affected by ink or those subjected to non-cast treatment can be used.

ボールホルダーは、紙面などにインキを直接転写する部材であるボールを回転自在に抱持する部材であり、ボールホルダーの先端開口部からボールが一部突出した状態となっている。ボールホルダーの先端開口部の縁部分は、圧接工具によるカシメと呼ばれる塑性変形加工によってボールの直径よりも小径に縮径されボールの抜け止めがなされると共に、圧接工具にてボールにボールホルダーの先端を押し付けることで、ボールホルダーの内側をボールと同曲率である幅を持った帯状部を形成することもできる。ボールホルダーの内部は、インキの通路となっているが、ボールの後方移動規制部となる内方突出部に放射状溝が形成されている。ボールホルダーの材質としては、ステンレスや真鍮、洋白といった金属製のものが使用できる。また、コイル線材から作るものと、予め中孔のあるパイプ材を使用するものとがある。   The ball holder is a member that rotatably holds a ball, which is a member that directly transfers ink onto a paper surface, and the ball partially protrudes from a tip opening of the ball holder. The edge of the opening of the tip of the ball holder is reduced to a diameter smaller than the diameter of the ball by plastic deformation called caulking with a pressure welding tool to prevent the ball from falling out. By pressing, it is also possible to form a band-like portion having a width having the same curvature as the ball inside the ball holder. The inside of the ball holder is an ink passage, but a radial groove is formed in an inward protruding portion serving as a rearward movement restricting portion of the ball. As the material of the ball holder, a metal such as stainless steel, brass, or white can be used. Moreover, there are a thing made from a coil wire and a pipe made with a medium hole in advance.

ボールペンの製造方法は、インキ収容管にノズル等を介してインキを充填し、ボールとボールを抱持したボールホルダーで構成される、所謂ボールペンチップをインキ収容部に圧入した後、後端側からノズルを介してグリース状のフォロワー体等を充填する。その後、ボールを中心側に向けてインキ収容管の後端側からインキ内部の気泡が外側に向かって除去できるように遠心したリフィルを外装体に組み込んで製造できる。   The ballpoint pen manufacturing method is such that a so-called ballpoint pen tip composed of a ball holder in which an ink containing tube is filled with ink through a nozzle or the like and holds the ball is press-fitted into the ink containing portion, and then from the rear end side. A grease-like follower body is filled through a nozzle. Thereafter, the refill can be manufactured by incorporating the refill that is centrifuged so that the bubbles inside the ink can be removed outward from the rear end side of the ink containing tube with the ball directed toward the center.

以下、各実施例においては、アルファベットの順に工程が移行するものとする。
実施例1
工程(a)(図1参照)
ボールホルダー1に、ボール抱持室1aとボール2の後方規制をなす内方突出部1bと、インキ流通孔1cと、放射状溝1d、バック孔1eをドリルなどの刃具やブローチなどのせん断加工具(図示せず)によって形成し、ボール2をボール抱持室1aに挿入後、ボールホルダー1の先端にローラーなどの圧接加工具(図示せず)によってカシメ加工(塑性加工による縮径加工)を行い、ボール2をハンマーピン(図示せず)にて後方側に向かって叩き、内方突出部1bの先端側にボール2の表面状態が転写された転写面を形成しボー
ルペンチップを形成する。その後、コイルスプリング3を自動供給装置などで1つずつボールペンチップの中にボールホルダー1の後端側から挿入し、押圧工具(図示せず)にてボールホルダー1のバック孔1eの内面に中心軸方向に向かって倒して突起部1fを形成させ、その突起部1fを弾撥作用をなすコイル部3aの線径の間に嵌合させて固定する。工程(b)(図2参照)
コイルスプリング3の後方から先尖状の治具Kを挿入させ、治具Kの外径とコイルスプリング3の弾撥作用をなすコイル部3aの内径とで仮圧入状態とした後に、コイルスプリング3をコイルスプリング3の軸心に対して適宜の回転角度と回転方向に回転させる。この時、先尖状の治具Kを挿入する際に、前記突起部1fと前記先尖状の治具Kが接触して突起部1fが広がって、コイルスプリング3が飛散することがないように、それぞれの中心軸を一致させる。また治具Kの外径とコイルスプリング3の前記コイル部3aの内径とで仮圧入となるように、双方の寸法の調整をする。
工程(c)(図3参照)
コイルスプリング3の後方に挿入されていた先尖状の治具Kを後方に引き抜く。またこの時、前記治具Kを回転させながら引き抜くことも適宜である。
Hereinafter, in each Example, a process shall transfer in order of an alphabet.
Example 1
Step (a) (see FIG. 1)
The ball holder 1 has a ball holding chamber 1a, an inward projecting portion 1b that regulates the rear of the ball 2, an ink circulation hole 1c, a radial groove 1d, and a back hole 1e. A shearing tool such as a cutting tool such as a drill or a broach. (Not shown), and after the ball 2 is inserted into the ball holding chamber 1a, the tip of the ball holder 1 is subjected to crimping (diameter reduction by plastic working) with a pressure contact tool (not shown) such as a roller. Then, the ball 2 is struck rearward with a hammer pin (not shown), and a transfer surface on which the surface state of the ball 2 is transferred is formed on the tip side of the inward projecting portion 1b to form a ball-point pen tip. Thereafter, the coil springs 3 are inserted into the ballpoint pen tip one by one with an automatic supply device or the like from the rear end side of the ball holder 1 and centered on the inner surface of the back hole 1e of the ball holder 1 with a pressing tool (not shown). The protrusion 1f is formed by tilting in the axial direction, and the protrusion 1f is fitted and fixed between the wire diameters of the coil portion 3a that performs an elastic action. Step (b) (see FIG. 2)
A pointed jig K is inserted from the rear side of the coil spring 3, and after a temporary press-fitting state is established between the outer diameter of the jig K and the inner diameter of the coil portion 3 a that performs the elastic action of the coil spring 3, the coil spring 3 Are rotated in an appropriate rotation angle and rotation direction with respect to the axis of the coil spring 3. At this time, when the tip-shaped jig K is inserted, the projection 1f and the tip-shaped jig K come into contact with each other so that the projection 1f spreads and the coil spring 3 is not scattered. And the respective central axes coincide with each other. Further, both dimensions are adjusted so that the outer diameter of the jig K and the inner diameter of the coil portion 3a of the coil spring 3 are temporarily press-fitted.
Step (c) (see FIG. 3)
The pointed jig K inserted behind the coil spring 3 is pulled out backward. At this time, it is also appropriate to pull out the jig K while rotating it.

実施例2
工程(a)(図4参照)
実施例1工程(a)と同様のボールペンチップに、コイルスプリング3を自動供給装置などで1つずつボールペンチップの中にボールホルダー1の後端側から挿入し、ボールホルダー2後方に他部材4を圧入接続し、別部材4の内孔に設けられた段部によってコイルスプリングの後退規制をすると共に、コイルスプリング2の一部を他部材4の後方に露出させる。本実施例では、他部材4より露出した部分をストレート状としたものである。
工程(b)(図5参照)
他部材4の後端より露出したコイルスプリング3を治具Kにてチャッキングし、コイルスプリング3をコイルスプリング3の軸心に対して適宜の回転角度と回転方向に回転させる。コイルスプリング1の内部に先尖状の治具Kを挿入する必要がないので、前記突起部1fが広がってコイルスプリング3が飛散することが防止できると共に、先尖状の治具Kの外径とコイルスプリング3の前記コイル部3aの内径との細かい寸法調整を必要としない方法である。
工程(c)(図6参照)
ボールホルダー1の後端より露出したコイルスプリング3とのチャッキングを開放し治具K後方に移動する。またこの時、前記治具Kを回転させながら後方に移動させることも適宜である。
Example 2
Step (a) (see FIG. 4)
The coil springs 3 are inserted into the same ballpoint pen tip as in step (a) of the first embodiment from the rear end side of the ball holder 1 into the ballpoint pen tip one by one with an automatic feeder or the like, and the other member 4 is placed behind the ball holder 2. Are press-fitted and the retraction of the coil spring is regulated by a step provided in the inner hole of the separate member 4, and a part of the coil spring 2 is exposed behind the other member 4. In this embodiment, the portion exposed from the other member 4 is straight.
Step (b) (see FIG. 5)
The coil spring 3 exposed from the rear end of the other member 4 is chucked by the jig K, and the coil spring 3 is rotated in an appropriate rotation angle and rotation direction with respect to the axis of the coil spring 3. Since it is not necessary to insert the pointed jig K inside the coil spring 1, it is possible to prevent the projection 1f from spreading and the coil spring 3 from being scattered, and the outer diameter of the pointed jig K. And a small dimensional adjustment between the coil spring 3 and the inner diameter of the coil portion 3a.
Step (c) (see FIG. 6)
The chucking with the coil spring 3 exposed from the rear end of the ball holder 1 is released and moved to the rear of the jig K. At this time, it is also appropriate to move the jig K backward while rotating it.

実施例3
工程(a)(図1参照)
実施例1の工程(a)と同様のため、説明は割愛する。
工程(b)(図7参照)
コイルスプリング3の後方から、コイル内径よりも僅かに小径の先端部を有し、その先端部の中央に後端まで貫通した中孔部を設けるとともに、先端部に前記中孔部に連通している溝部を、中心部から外側に向かって放射状に形成したチャック治具をコイルスプリング内部に挿入する。この時、チャック治具Lを挿入する際に、前記突起部1fと前記チャック治具Lが接触して突起部1fが広がって、コイルスプリング3が飛散することがないように、それぞれの中心軸を一致させる。
工程(c)(図8参照)
チャック治具Lの中孔部に中孔部の径よりも大きい直径の棒体L1を挿入させて、チャック治具先端を拡径させてチャック治具Lの外径とコイルスプリング3の弾撥作用をなすコイル部3aの内径とで仮圧入状態とした後に、コイルスプリング3をコイルスプリング3の軸心に対して適宜の回転角度と回転方向に回転させる。
工程(d)(図9参照)
前記チャック治具Lの中孔部に挿入されていた棒体L1を後方に引き抜いた後に、チャック治具Lをコイルスプリング3から後方に引き抜く。またこの時、前記チャック治具Lを回転させながら引き抜くことも適宜である。
Example 3
Step (a) (see FIG. 1)
Since it is the same as the process (a) of Example 1, description is omitted.
Step (b) (see FIG. 7)
A rear end of the coil spring 3 has a tip portion slightly smaller than the inner diameter of the coil, and a center hole portion penetrating to the rear end is provided at the center of the tip portion, and the tip portion communicates with the hole portion. A chuck jig in which the groove portions are formed radially from the center portion toward the outside is inserted into the coil spring. At this time, when inserting the chuck jig L, the central axis of each of the projecting portions 1f and the chuck jig L is not in contact with each other so that the projecting portion 1f is expanded and the coil spring 3 is not scattered. Match.
Step (c) (see FIG. 8)
A rod body L1 having a diameter larger than the diameter of the middle hole is inserted into the middle hole of the chuck jig L, the tip of the chuck jig is expanded, and the outer diameter of the chuck jig L and the elasticity of the coil spring 3 are rebounded. The coil spring 3 is rotated in an appropriate rotation angle and rotation direction with respect to the axial center of the coil spring 3 after the provisional press-fitting state is established with the inner diameter of the coil portion 3 a that acts.
Step (d) (see FIG. 9)
After the rod body L1 inserted in the hole portion of the chuck jig L is pulled out backward, the chuck jig L is pulled out from the coil spring 3 backward. At this time, it is also appropriate to pull out the chuck jig L while rotating it.

本発明の一例を示す要部断面図。The principal part sectional drawing which shows an example of this invention. 一例の次工程を示す要部断面図。The principal part sectional drawing which shows the next process of an example. 一例の更に次の工程を示す要部断面図。The principal part sectional drawing which shows the further next process of an example. 別の一例を示す要部断面図。The principal part sectional view showing another example. 別の一例の次工程を示す要部断面図。The principal part sectional drawing which shows the next process of another example. 別の一例の更に次工程を示す要部断面図。The principal part sectional drawing which shows the further next process of another example. 更に別の一例を示す要部断面図。The principal part sectional view showing still another example. 更に別の一例の次工程を示す要部断面図。The principal part sectional view showing the next process of still another example. 更に別の一例の更に次工程を示す要部断面図。The principal part sectional view showing the further next process of still another example.

符号の説明Explanation of symbols

1 ボールホルダー
1a ボール抱持室
1b 内方突出部
1c インキ流通孔
1d 放射状溝
1e バック孔
1f 突起部
2 ボール
3 コイルスプリング
3a コイル部
4 他部材
K 治具
L チャック治具
L1 棒体
DESCRIPTION OF SYMBOLS 1 Ball holder 1a Ball holding chamber 1b Inward protrusion part 1c Ink distribution hole 1d Radial groove 1e Back hole 1f Protrusion part 2 Ball 3 Coil spring 3a Coil part 4 Other members K Jig L L chuck Jig L1 Rod body

Claims (1)

筆記部材としてのボールを前方付勢するコイルスプリングをボールホルダー内に挿入し、前記コイルスプリングに後退規制を施した後に、コイルスプリングをコイルスプリングの軸心に対して回転させるボールペンチップの製造方法。 A method of manufacturing a ballpoint pen tip, wherein a coil spring for biasing a ball as a writing member is inserted into a ball holder, and after the coil spring is subjected to retraction restriction, the coil spring is rotated with respect to the axis of the coil spring.
JP2008304187A 2008-08-27 2008-11-28 Ballpoint pen manufacturing method Expired - Fee Related JP5187165B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010052391A (en) * 2008-08-29 2010-03-11 Pilot Ink Co Ltd Ballpoint pen and method of manufacturing ballpoint pen
JP2013095054A (en) * 2011-10-31 2013-05-20 Pentel Corp Coil spring for ballpoint pen tip
CN112721494A (en) * 2021-02-08 2021-04-30 上海晨光文具股份有限公司 Needle tube type spring pen point and processing technology thereof
CN113074226A (en) * 2021-03-18 2021-07-06 江西省永智制笔有限公司 Power head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0820184A (en) * 1994-07-05 1996-01-23 Mitsubishi Pencil Co Ltd Ball-point pen
JP2003170691A (en) * 2001-12-06 2003-06-17 Pilot Corp Method for manufacturing tip of ball-point pen
JP2003220786A (en) * 2002-01-30 2003-08-05 Pilot Ink Co Ltd Ball-point pen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0820184A (en) * 1994-07-05 1996-01-23 Mitsubishi Pencil Co Ltd Ball-point pen
JP2003170691A (en) * 2001-12-06 2003-06-17 Pilot Corp Method for manufacturing tip of ball-point pen
JP2003220786A (en) * 2002-01-30 2003-08-05 Pilot Ink Co Ltd Ball-point pen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010052391A (en) * 2008-08-29 2010-03-11 Pilot Ink Co Ltd Ballpoint pen and method of manufacturing ballpoint pen
JP2013095054A (en) * 2011-10-31 2013-05-20 Pentel Corp Coil spring for ballpoint pen tip
CN112721494A (en) * 2021-02-08 2021-04-30 上海晨光文具股份有限公司 Needle tube type spring pen point and processing technology thereof
CN113074226A (en) * 2021-03-18 2021-07-06 江西省永智制笔有限公司 Power head
CN113074226B (en) * 2021-03-18 2022-10-25 江西省永智制笔有限公司 Power head

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