JP4628068B2 - Writing instrument - Google Patents

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JP4628068B2
JP4628068B2 JP2004333099A JP2004333099A JP4628068B2 JP 4628068 B2 JP4628068 B2 JP 4628068B2 JP 2004333099 A JP2004333099 A JP 2004333099A JP 2004333099 A JP2004333099 A JP 2004333099A JP 4628068 B2 JP4628068 B2 JP 4628068B2
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cylinder
main body
detachable
cap
peripheral surface
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JP2006142559A (en
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吉敏 相沢
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Zebra Co Ltd
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Zebra Co Ltd
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Description

本発明は、中綿等のインク収容体を、交換可能に内在している中綿交換式筆記具として好適な筆記具に関する。   The present invention relates to a writing instrument suitable as a batting exchange-type writing instrument in which an ink container such as batting is replaceably provided.

従来、中綿式筆記具等においては、本体筒が開放されて内在するインクが揮発してしまうのを防ぐ観点等から、本体筒に対し、その全周にわたって先口や尾栓等の着脱筒を凹凸状に嵌合させるようにしたものが一般的であった。
そして、この従来の嵌合構造では、前記本体筒と前記着脱筒とが強固に嵌合されるため、本体筒に対し前記着脱筒を容易に着脱することができなかった。
しかし、近年では、環境保護や、ごみ処理問題等の観点からリサイクル性を重視し、前記着脱筒を着脱して、内在する中綿を交換可能にした筆記具が求められている。
Conventionally, in a batting type writing instrument etc., from the viewpoint of preventing volatilization of the ink that is contained when the main body cylinder is opened, the detachable cylinder such as the tip and tail plug is unevenly formed on the entire circumference of the main body cylinder. In general, it was made to fit in a shape.
And in this conventional fitting structure, since the said main body cylinder and the said attachment / detachment cylinder were fit firmly, the said attachment / detachment cylinder was not able to be attached or detached easily with respect to a main body cylinder.
However, in recent years, there has been a demand for a writing instrument that attaches importance to recyclability from the viewpoints of environmental protection, waste disposal problems, and the like, and allows the internal cotton pad to be replaced by attaching and detaching the removable cylinder.

そこで、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、軸筒(12)の筆記先端側の開口部に先口(13)を螺合し接続しており、内在する中綿(11)を交換する際等に、前記先口(13)を手や治具等により回転させて着脱するようにしたものがある。
また、他の関連する発明としては、特許文献2に記載されたもののように、本体筒(2)の尾端側の内周面と、尾栓(3)の外周面とを凹凸状に嵌合させるようにした塗布具であって、前記尾栓(3)を外筒(15)と内筒(16)とから一体に形成するとともに、外筒(15)には軸方向のスリット(30,31)を設けてなり、該スリット(30,31)を撓み代にして外筒(15)を撓ませることで、尾栓(3)の着脱を可能にしたものがある。
Therefore, in this kind of invention, for example, as described in Patent Document 1, the front end (13) is screwed and connected to the opening on the writing tip side of the shaft tube (12), and the internal For example, when the batting (11) is replaced, the tip (13) is rotated by a hand or a jig to be attached or detached.
Further, as another related invention, like the one described in Patent Document 2, the inner peripheral surface of the tail end side of the main body tube (2) and the outer peripheral surface of the tail plug (3) are fitted in an uneven shape. The tail plug (3) is integrally formed from the outer cylinder (15) and the inner cylinder (16), and the outer cylinder (15) has an axial slit (30). , 31), and the outer tube (15) is bent by using the slits (30, 31) as a bending allowance to allow the tail plug (3) to be attached and detached.

しかしながら、前者の従来技術では、先口(13)の外周面に雄螺子部(13c)を設け、且つ軸筒(12)の内周面には雌螺子部(12a)を設けた構造としていたため、その成型が複雑なことや、各螺子部を寸法管理し難いこと等、コストが嵩む要因を有していた。その上、先口(13)が軸筒(12)に対して、きつく螺合されてしまい、先口(13)を外すのが困難になる場合もあった。
また、後者の従来技術では、尾栓(3)を外筒(15)と内筒(16)とからなる二重筒状に構成するとともに、外筒(15)を径方向へ貫通するスリット(30,31)を有する構造であったため、いっそう成型が複雑で、コストが嵩む要因となっていた。
特開2003−63190号公報 特開2004−82328号公報
However, the former prior art has a structure in which a male screw portion (13c) is provided on the outer peripheral surface of the tip (13) and a female screw portion (12a) is provided on the inner peripheral surface of the shaft tube (12). For this reason, the molding is complicated, and it is difficult to manage the dimensions of each screw portion, which causes factors that increase costs. In addition, the tip (13) may be tightly screwed with the shaft cylinder (12), making it difficult to remove the tip (13).
Further, in the latter prior art, the tail plug (3) is formed in a double cylinder shape including an outer cylinder (15) and an inner cylinder (16), and a slit (diameter penetrating the outer cylinder (15) in the radial direction ( 30, 31), the molding is more complicated and the cost is increased.
JP 2003-63190 A JP 2004-82328 A

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、インク収容体の交換を容易に行える上、簡素構造で生産性に優れた筆記具を提供することにある。   The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is to provide a writing instrument that can easily replace an ink container and has a simple structure and excellent productivity.

上記課題を解決するために第一の発明では、本体筒に対し着脱筒を軸方向へ嵌脱して、該本体筒及び/又は該着脱筒の内部のインク収容体を着脱するようにした筆記具であって、
前記本体筒と前記着脱筒との内、その一方の筒に、周方向において部分的に径方向へ突出する突部を複数設けるとともに、その他方の筒に、前記複数の突部に接触可能な凹凸の無い圧接面を設け、これら双方の筒を接続した際に、該突部と該圧接面とが径方向へ圧接し合うようにし、前記着脱筒を筆記先端側の先口部と一体的に形成するとともに、この先口部を着脱可能にキャップで覆い、該キャップは、前記着脱筒から前記本体筒に跨って設けられるとともに、該キャップ内周面の環状突部を前記本体筒の外周面に対し全周にわたって密接させて、前記本体筒に対し抜き方向への移動が阻まれるように係合し、さらに、該キャップは、該キャップ内において前記着脱筒が前記本体筒に対し抜き方向へずれてしまうのを防ぐように、前記着脱筒に対しその前方側から当接もしくは近接していることを特徴とする。
In order to solve the above-mentioned problems, in the first invention, a writing instrument in which a detachable cylinder is fitted to and detached from a main body cylinder in an axial direction, and the main body cylinder and / or an ink container inside the detachable cylinder is attached and detached. There,
Of the main body cylinder and the detachable cylinder, one of the cylinders is provided with a plurality of protrusions that protrude partially in the radial direction in the circumferential direction, and the other cylinder can contact the plurality of protrusions. Provide a pressure contact surface with no unevenness, and when these two tubes are connected, the protruding portion and the pressure contact surface are in pressure contact with each other in the radial direction, and the detachable tube is integrated with the front end portion on the writing tip side. The cap is detachably covered with a cap, the cap is provided across the main body cylinder from the removable cylinder, and an annular protrusion on the inner peripheral surface of the cap is provided on the outer peripheral surface of the main body cylinder. The cap is engaged with the main body cylinder so as to be prevented from moving in the pulling direction, and the cap is connected to the main body cylinder in the pulling direction. The attachment and detachment to prevent slippage Characterized in that it abut against or close from the front side with respect to.

また、第二の発明では、前記着脱筒の内周面に、軸方向へわたる第一の突条を複数設け、これら第一の突条によって前記インク収容体を保持し、前記本体筒内周面には、軸方向へわたる第二の突条を複数設け、これら第二の突条によって前記インク収容体を保持し、前記第二の突条と前記インク収容体との嵌合力は、その求心方向への突出寸法を調整することにより、前記第一の突条と前記インク収容体との嵌合力よりも弱くなるように設定されていることを特徴とする。 In the second invention, a plurality of first protrusions extending in the axial direction are provided on the inner peripheral surface of the removable cylinder, the ink container is held by the first protrusions, and the inner periphery of the main body cylinder The surface is provided with a plurality of second protrusions extending in the axial direction, the ink container is held by these second protrusions, and the fitting force between the second protrusion and the ink container is By adjusting the protruding dimension in the centripetal direction, it is set to be weaker than the fitting force between the first protrusion and the ink container .

また、第三の発明では、上記各突部が軸方向へわたって連続的に設けられていることを特徴とする。 The third invention is characterized in that each of the protrusions is continuously provided in the axial direction .

また、第四の発明では、上記着脱筒には、上記本体筒側で露出される外周面に、周方向へ略凹凸状となる摘み部が形成されていることを特徴とする。   According to a fourth aspect of the present invention, the detachable cylinder has a knob portion that is substantially concave and convex in the circumferential direction on the outer peripheral surface exposed on the main body cylinder side.

なお、上記着脱筒とは、内在された上記インク収容体を着脱するために、上記本体筒に対して軸方向へ嵌脱される部材であればよく、この着脱筒の具体例としては、ペン体を内在させるための先口部を一体的に具備した態様や、単頭式筆記具における後端側の尾栓を一体的に具備した態様等が挙げられる。   The detachable cylinder may be any member that is fitted and removed in the axial direction with respect to the main body cylinder in order to detach the ink container contained therein, and a specific example of the detachable cylinder is a pen. Examples include an embodiment in which a front end portion for incorporating a body is integrally provided, and an embodiment in which a tail plug on the rear end side in a single-head type writing instrument is integrally provided.

また、上記「上記本体筒に対し抜き方向への移動が阻まれるように係合する」という構成の具体例としては、上記キャップを上記本体筒に対し乗り越え嵌合させるようにした態様や、上記キャップの内周面を上記本体筒の外周面に対し凹凸状に嵌合させるようにした態様等が挙げられる。
また、上記「上記着脱筒に対しその前方側から当接もしくは近接するように形成」という構成の具体例としては、上記着脱筒の外周面と上記キャップの内周面との双方に、軸方向に当接もしくは近接し合う段部を設けた態様とすればよい。
In addition, as a specific example of the configuration of “engaged so as to prevent movement in the pulling direction with respect to the main body tube”, an aspect in which the cap is fitted over the main body tube, Examples include an embodiment in which the inner peripheral surface of the cap is fitted to the outer peripheral surface of the main body tube in an uneven manner.
In addition, as a specific example of the configuration of “formed so as to abut or approach the detachable cylinder from the front side”, both the outer peripheral surface of the detachable cylinder and the inner peripheral surface of the cap are axially arranged. The step may be a mode in which a stepped portion that is in contact with or close to is provided.

本発明は、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。
第一の発明によれば、従来技術のような凹凸状の嵌合構造とせず、本体筒と着脱筒との接続状態を、複数の突部と凹凸の無い圧接面との圧接により維持しているため、本体筒に対し着脱筒を容易に嵌脱させることができる。しかも、本体筒と着脱筒とを螺合接続した態様のように本体筒に対し着脱筒がきつく締まりすぎてしまうこともない。ひいては、インク収容体の交換を容易に行うことができる。
しかも、各突部が周方向において部分的に突出する構造としているため、全周にわたる環状突部を設けた場合と比較し、寸法調整による嵌合力の調整がし易く、ひいては、着脱筒の着脱が容易な適切な嵌合力を得ることができる。
その上、螺子部やスリット等を設けるようにした従来技術と比較し、構造が簡素なため、成型が容易であり、生産性に優れている。
更に、この発明によれば、キャップによって筆記先端部を保護できるのは勿論のこと、該キャップと本体筒との全周にわたる密接により、インク収容体内のインクが揮発してしまうのを防止することができる。
すなわち、複数の部分的な突部と圧接面との接触により、本体筒と着脱筒との接続を維持するようにした構造では、複数の突部間が、揮発したインクを流通させる通路となる場合がある。
しかしながら、この発明によれば、キャップを着脱筒から本体筒にわたって跨がせるとともに、本体筒に対し全周にわたって密接させるようにしているため、該キャップが装着された状態では、前記のような揮発したインクの通路を塞ぐことができる。
更に、この発明によれば、装着状態のキャップは、本体筒に対し容易に抜けないように係合した状態で、着脱筒に対して、その前方側から当接もしくは近接する。
よって、当該筆記具が落下等の不意の衝撃を受けた際に、キャップ内において着脱筒が本体筒に対し抜き方向へずれてしまうのを防ぐことができる。
Since the present invention is configured as described above, the following effects can be obtained.
According to the first invention, the connection state between the main body cylinder and the detachable cylinder is maintained by the pressure contact between the plurality of protrusions and the uneven pressure contact surface without using the uneven fitting structure as in the prior art. Therefore, the removable cylinder can be easily fitted to and detached from the main body cylinder. In addition, the detachable cylinder does not become too tight with respect to the main body cylinder as in the aspect in which the main body cylinder and the detachable cylinder are screwed together. As a result, the ink container can be easily replaced.
In addition, since each protrusion partially protrudes in the circumferential direction, it is easier to adjust the fitting force by adjusting the dimensions compared to the case where an annular protrusion is provided over the entire circumference. Therefore, it is possible to obtain an appropriate fitting force that is easy.
In addition, the structure is simple and the molding is easy and the productivity is excellent as compared with the conventional technique in which a screw part, a slit, or the like is provided.
Furthermore, according to the present invention, the writing tip can be protected by the cap, and the ink in the ink container is prevented from volatilizing due to the close contact between the cap and the main body cylinder. Can do.
That is, in the structure in which the connection between the main body cylinder and the detachable cylinder is maintained by the contact between the plurality of partial protrusions and the pressure contact surface, the plurality of protrusions serve as passages through which the volatile ink flows. There is a case.
However, according to the present invention, the cap extends from the detachable cylinder to the main body cylinder and is in close contact with the main body cylinder over the entire circumference. Therefore, when the cap is attached, the volatilization as described above is performed. It is possible to block the ink passage.
Further, according to the present invention, the cap in the mounted state is in contact with or close to the removable cylinder from the front side in an engaged state so as not to easily come off from the main body cylinder.
Therefore, when the writing instrument receives a sudden impact such as dropping, it is possible to prevent the detachable cylinder from shifting in the pulling direction with respect to the main body cylinder in the cap.

更に、第二の発明によれば、本体筒に対し着脱筒を引き抜くと、第一の突条とインク収容体との嵌合力が、第二の突条とインク収容体との嵌合力よりも強いため、インク収容体は、着脱筒側に嵌合されたままの状態で、本体筒内から引き抜かれることになる。 Further, according to the second invention, when the removable cylinder is pulled out from the main body cylinder, the fitting force between the first protrusion and the ink container is larger than the fitting force between the second protrusion and the ink container. Since the ink container is strong, the ink container is pulled out from the main body cylinder while being fitted to the detachable cylinder side.

更に、第三の発明によれば、各突部が軸方向へわたって連続的に圧接面に接触するため、不意の衝撃等により、本体筒に対し着脱筒が抜け方向へずれたり完全に抜けてしまったりするのを防止することができる。
しかも、各突部が軸方向へ延びているため、その成型が容易であり、いっそう生産性を向上することができる。
Furthermore, according to the third aspect of the invention, each protrusion continuously contacts the pressure contact surface in the axial direction. Can be prevented.
And since each protrusion is extended in the axial direction, the shaping | molding is easy and productivity can be improved further.

更に、第四の発明によれば、手や治具等により摘み部を摘んだ状態で、本体筒に対し、着脱筒を周方向へ回しながら軸方向へ抜き差しすることができるため、着脱筒を単に軸方向へ抜き差ししようとした場合と比較して、その抜き差しの際の抵抗が少なく、着脱筒の着脱作業を良好に行うことができる。   Furthermore, according to the fourth aspect of the invention, it is possible to insert / remove the detachable cylinder in the axial direction while rotating the detachable cylinder in the circumferential direction with respect to the main body cylinder in a state where the knob is picked by a hand or a jig. Compared with the case of simply trying to insert / remove in the axial direction, there is less resistance at the time of insertion / removal, and the attachment / detachment work of the attachment / detachment cylinder can be performed satisfactorily.

以下、本発明の実施の形態を図面に基づいて説明する。
この筆記具Aは、本体筒10に対し着脱筒20を軸方向へ嵌脱可能に接続し、これら本体筒10から着脱筒20にわたる内部にインク収容体30を備え、該インク収容体30から供給されるインクを、前端側(図1における上端側)の太書き用ペン体40と後端側(図1における下端側)の細書き用ペン体50との各々から吐出するようにした両頭式の筆記具であり、本体筒10から着脱筒20を嵌脱して、内部のインク収容体30を交換できるように構成してある。
そして、この筆記具Aの前記太書き用ペン体40は、太書き側キャップ60によって保護され、また、細書き用ペン体50は、細書き側キャップ70によって保護されている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The writing instrument A is connected to the main body cylinder 10 so that the detachable cylinder 20 can be fitted and removed in the axial direction, and includes an ink container 30 inside the main body cylinder 10 and the detachable cylinder 20, and is supplied from the ink container 30. Ink is discharged from each of the thick writing pen body 40 on the front end side (upper end side in FIG. 1) and the thin writing pen body 50 on the rear end side (lower end side in FIG. 1). It is a writing instrument, and is configured so that the removable ink jet cylinder 20 can be removed from the main cylinder 10 and the internal ink container 30 can be replaced.
The thick writing pen body 40 of the writing instrument A is protected by a thick writing side cap 60, and the thin writing pen body 50 is protected by a thin writing side cap 70.

本体筒10は、当該筆記具Aの略全長にわたる筒体であり、その前端側に、後述する着脱筒20を嵌脱可能に接続するための接続部11を形成し、後端側には細書き用ペン体50を保持するための先口部12を形成している。   The main body cylinder 10 is a cylinder extending over substantially the entire length of the writing instrument A, and a connecting portion 11 for connecting a detachable cylinder 20 to be described later is detachably connected to the front end side of the writing instrument A. A front end portion 12 for holding the pen body 50 is formed.

接続部11は、略円筒状に形成され、その内周面に、後述する着脱筒20との接続状態を維持する圧接面11aを有するとともに、その外周面には、太書き側キャップ60を着脱可能に係合するための係合部11bを有する。
前記圧接面11aは、本体筒10内周面の略全周にわたって、凹凸の無い面に形成される。
また、前記係合部11bは、その前端側に、全周にわたって凹凸の無い面である密接部11b1を形成し、また、その密接部11b1よりも後端側に、環状突部11b2を形成している。
The connection portion 11 is formed in a substantially cylindrical shape, and has a pressure contact surface 11a that maintains a connection state with a removable cylinder 20 described later on an inner peripheral surface thereof, and a thick-side cap 60 is attached to and detached from the outer peripheral surface. It has the engaging part 11b for engaging possible.
The pressure contact surface 11a is formed on a surface having no unevenness over substantially the entire circumference of the inner peripheral surface of the main body cylinder 10.
Further, the engaging portion 11b has a close contact portion 11b1 that is a surface having no irregularities on the entire front end side thereof, and an annular protrusion 11b2 formed on the rear end side of the close contact portion 11b1. ing.

着脱筒20は、その後端側に、周方向において部分的に径方向へ突出する突部21(図3参照)を複数備え、その前端側に、先細状の先口部22を形成している。
前記突部21について詳細に説明すれば、各突部21は、着脱筒20の外周面から遠心方向へ突出するとともに、軸方向へわたって連続する突部であり、図示した好ましい一例によれば、着脱筒20の周方向において、所定間隔置きに3つ設けられている。
The detachable cylinder 20 includes a plurality of protrusions 21 (see FIG. 3) that protrude partially in the radial direction in the circumferential direction on the rear end side, and a tapered tip port portion 22 is formed on the front end side thereof. .
The protrusions 21 will be described in detail. Each protrusion 21 is a protrusion that protrudes in the centrifugal direction from the outer peripheral surface of the detachable cylinder 20 and is continuous in the axial direction. In the circumferential direction of the detachable cylinder 20, three are provided at predetermined intervals.

また、着脱筒20の外周面であって、上記本体筒10側で露出される部分には、該着脱筒20を本体筒10に対し着脱する際に摘まれるようにした摘み部23(図3参照)が形成されている。
この摘み部23は、その外周面が周方向へ凹凸状となるように形成され、図3に示す一例によれば、着脱筒20の縦断面を略多角形状とすることで構成されている。
Further, on the outer peripheral surface of the detachable cylinder 20 that is exposed on the main body cylinder 10 side, a knob 23 (FIG. 3) is configured to be picked when the detachable cylinder 20 is attached to and detached from the main body cylinder 10. Reference) is formed.
This knob part 23 is formed so that the outer peripheral surface becomes uneven in the circumferential direction, and according to the example shown in FIG. 3, the vertical section of the detachable cylinder 20 is formed in a substantially polygonal shape.

また、着脱筒20における先口部22と摘み部23との間には、後述する太書き側キャップ60の内周面の被当接部63に当接させるための当接部25が形成されている。
この当接部25は、図示例によれば、先口部22の基端側の外径を摘み部23の外径よりも若干縮径することで形成された摘み部23前端の傾斜面である。
Further, a contact portion 25 is formed between the front opening portion 22 and the knob portion 23 of the detachable cylinder 20 so as to be in contact with a contacted portion 63 on the inner peripheral surface of the thick side cap 60 described later. ing.
According to the illustrated example, the contact portion 25 is an inclined surface of the front end of the knob portion 23 formed by slightly reducing the outer diameter of the proximal end side of the leading end portion 22 from the outer diameter of the knob portion 23. is there.

そして、前記着脱筒20は、その内周面に、軸方向へ延びる複数の突条24(図2参照)を備え、これら突条24によって、インク収容体30の前端側外周面を圧接して保持し、更に、該インク収容体30よりも前端側には、太書き用ペン体40を保持している。   The detachable cylinder 20 has a plurality of protrusions 24 (see FIG. 2) extending in the axial direction on the inner peripheral surface thereof, and presses the outer peripheral surface of the front end side of the ink container 30 with these protrusions 24. Further, a thick writing pen body 40 is held on the front end side of the ink container 30.

前記インク収容体30は、多数の合成繊維を筒状の合成樹脂フィルム内に納め、インクを含浸させてなる所謂中綿であり、その前端部と後端部の各々からインクを吐出させるように構成してある。
また、太書き用ペン体40と細書き用ペン体50の各々は、多数の合成繊維を略軸状もしくは砲弾状に束ねてなり、前記インク収容体30から供給されるインクを、毛細管力によって先端部へ導く。
The ink container 30 is a so-called batting in which a large number of synthetic fibers are contained in a cylindrical synthetic resin film and impregnated with ink, and is configured to eject ink from each of its front end and rear end. It is.
Further, each of the thick writing pen body 40 and the thin writing pen body 50 is formed by bundling a large number of synthetic fibers in a substantially axial shape or a shell shape, and the ink supplied from the ink container 30 is caused by capillary force. Lead to the tip.

また、太書き側キャップ60は、本体筒10の上記係合部11bに対し着脱される略筒状に形成され、その内周面の後端側(図1における下端側)に突部61を備えるとともに、同内周面の前端側に環状突部62を備える。
そして、この太書き側キャップ60は、着脱筒20から本体筒10に跨るようにして、本体筒10に装着されるとともに、前記環状突部62を本体筒10の外周面に対し全周にわたって密接させている。
The bold side cap 60 is formed in a substantially cylindrical shape that can be attached to and detached from the engaging portion 11b of the main body cylinder 10, and a protrusion 61 is provided on the rear end side (lower end side in FIG. 1) of the inner peripheral surface thereof. In addition, an annular protrusion 62 is provided on the front end side of the inner peripheral surface.
The bold side cap 60 is attached to the main body cylinder 10 so as to straddle the main body cylinder 10 from the removable cylinder 20, and the annular protrusion 62 is in close contact with the outer peripheral surface of the main body cylinder 10 over the entire circumference. I am letting.

上記突部61は、全周にわたって環状に設けられていてもよいし、周方向において部分的に複数設けられていてもよい。そして、この突部61は、上記接続部11bの環状突部11b2に対し乗り越え嵌合することで、太書き側キャップ60が本体筒10に対し抜き方向(図1における上方)へ移動するのを阻む。
なお、本体筒10に対する太書き側キャップ60の着脱は、太書き側キャップ60の径方向への弾性変形により可能となっている。
The protrusion 61 may be provided annularly over the entire circumference, or a plurality of protrusions 61 may be provided partially in the circumferential direction. Then, the protrusion 61 moves over and fits into the annular protrusion 11b2 of the connecting portion 11b, so that the bold side cap 60 moves in the pulling direction (upward in FIG. 1) with respect to the main body cylinder 10. Stop.
The bold cap 60 can be attached to and detached from the main body cylinder 10 by elastic deformation of the bold cap 60 in the radial direction.

また、上記環状突部62は、着脱筒20と本体筒10との継ぎ目pよりも後端側(図1における下端側)に位置し、上記係合部11b前端側の密接部11b1に対し、全周にわたって接触することで、該太書き側キャップ60内を密封している。   Further, the annular protrusion 62 is located on the rear end side (lower end side in FIG. 1) from the joint p between the detachable cylinder 20 and the main body cylinder 10, and with respect to the close contact portion 11b1 on the front end side of the engagement portion 11b. By contacting the entire circumference, the inside of the bold side cap 60 is sealed.

また、太書き側キャップ60は、その内周面における軸方向の中央近傍に、着脱筒20の当接部25に当接させるための被当接部63を備える。
この被当接部63は、太書き側キャップ60の内周面において、軸方向の中央近傍よりも前方側の部分を若干縮径することで形成され、着脱筒20の当接部25に対しその前方側から当接可能な傾斜面である。
この被当接部63は、図示された好ましい一例によれば、太書き側キャップ60が装着されている状態において、着脱筒20の当接部25に対し近接するよう(若干の隙間を有して接触していない状態)に配置される。したがって、太書き側キャップ60内で、着脱筒20が本体筒10に対し抜き方向へ移動した際には該着脱筒20に当接する。なお、この被当接部63を、当接部25に対し、予め当接させるように配置することも可能である。
Further, the bold side cap 60 includes a contacted portion 63 for contacting the contact portion 25 of the removable cylinder 20 in the vicinity of the center in the axial direction on the inner peripheral surface thereof.
The abutted portion 63 is formed by slightly reducing the diameter of the portion on the front side of the inner peripheral surface of the bold side cap 60 from the vicinity of the center in the axial direction, with respect to the abutting portion 25 of the removable cylinder 20. It is the inclined surface which can contact | abut from the front side.
The abutted portion 63, in accordance with a preferred example shown the figure, in a state where the thick writing-side cap 60 is mounted, so as to close against the abutment portion 25 of the detachable barrel 20 (have a slight gap And are not in contact with each other). Therefore, when the detachable cylinder 20 moves in the drawing direction with respect to the main body cylinder 10 in the bold side cap 60, it comes into contact with the detachable cylinder 20. In addition, it is also possible to arrange | position this to-be-contacted part 63 with respect to the contact part 25 previously.

また、本体筒10後端側の先口部12は、その内周面に、単数もしくは複数(図示例によれば二つ)の嵌合補助部材12a,12bを介して、細書き用ペン体50を保持している。
そして、この先口部12の外周面には、細書き側キャップ70が着脱可能に装着されている。
Further, the front end portion 12 on the rear end side of the main body cylinder 10 has a thin writing pen body on its inner peripheral surface via a single or plural (two in the illustrated example) fitting auxiliary members 12a and 12b. 50 is held.
A thin writing side cap 70 is detachably mounted on the outer peripheral surface of the tip 12.

また、本体筒10内周面における先口部12よりも若干前方側の部位には、軸方向へわたる突条12cが複数形成され、これら突条12cの突端によってインク収容体30が保持されている。
なお、この突条12cとインク収容体30との嵌合力は、その求心方向への突出寸法を調整することにより、太書き用ペン体40側の突条24とインク収容体30との嵌合力よりも弱くなるように設定されている。
Further, a plurality of protrusions 12c extending in the axial direction are formed at a portion slightly ahead of the front opening 12 on the inner peripheral surface of the main body cylinder 10, and the ink container 30 is held by the protrusions of these protrusions 12c. Yes.
The fitting force between the protrusion 12c and the ink container 30 is adjusted by adjusting the projecting dimension in the centripetal direction, whereby the fitting force between the protrusion 24 on the thick writing pen 40 side and the ink container 30 is adjusted. It is set to be weaker than.

次に、上記構成の筆記具Aについて、その作用効果を詳細に述べる。
インク収容体30を交換する際、太書き側キャップ60を外した状態で、摘み部23を手などにより摘み、本体筒10に対し、着脱筒20を回しながら軸方向へ引っ張る。すると、着脱筒20外周面の突部21が、本体筒10内の圧接面11aとの間で滑りを生じるため、着脱筒20を容易に軸後方へ引き抜くことができる。
なお、本体筒10に対し、着脱筒20を回すことなく軸方向へ引き抜くようにしてもよいが、前記のように着脱筒20を回しながら引き抜くようにした方が、突部21と圧接面11aとの間の滑りを発生し易く、その引き抜き作業が容易である。
Next, the effect of the writing instrument A having the above configuration will be described in detail.
When the ink container 30 is replaced, the knob 23 is picked by hand with the thick-side cap 60 removed, and pulled in the axial direction while rotating the detachable cylinder 20 with respect to the main body cylinder 10. Then, since the protrusion 21 on the outer peripheral surface of the detachable cylinder 20 slips between the pressure contact surface 11a in the main body cylinder 10, the detachable cylinder 20 can be easily pulled out rearward of the shaft.
The main body cylinder 10 may be pulled out in the axial direction without rotating the detachable cylinder 20, but the protrusion 21 and the pressure contact surface 11a are more easily pulled out while rotating the detachable cylinder 20 as described above. Slipping easily occurs, and the drawing operation is easy.

本体筒10に対し着脱筒20を引き抜くと、突条24とインク収容体30との嵌合力が、突条12cとインク収容体30との嵌合力よりも強いため、インク収容体30は、着脱筒20側に嵌合されたままの状態で、本体筒10内から引き抜かれることになる。   When the detachable cylinder 20 is pulled out of the main body cylinder 10, the fitting force between the protrusion 24 and the ink container 30 is stronger than the fitting force between the protrusion 12 c and the ink container 30. The main body cylinder 10 is pulled out while being fitted to the cylinder 20 side.

そして、着脱筒20に嵌合されたインク収容体30が、手等により摘まれて引き抜かれ、代りに未使用のインク収容体が装着される。
その後は、上記と逆の手順により、着脱筒20が本体筒10に接続され、太書き側キャップ60が装着される。
Then, the ink container 30 fitted to the detachable cylinder 20 is picked and pulled by a hand or the like, and an unused ink container is mounted instead.
Thereafter, the detachable cylinder 20 is connected to the main body cylinder 10 and the thick-side cap 60 is attached according to the reverse procedure.

したがって、上記筆記具Aによれば、本体筒10と着脱筒20との接続状態を、複数の突部21と凹凸の無い圧接面11aとの圧接力により維持するようにしているため、本体筒10に対し着脱筒20を外したり嵌めたりする作業が容易である。
しかも、突部21及び圧接面11aの構造が簡素であるため、本体筒10及び着脱筒20の成型性が良好である。
その上、突部が周方向において部分的に複数設けられているため、例えば、全周にわたる環状の突部を設けるようにした場合と比較して、適当な嵌合力を得易い。
Therefore, according to the writing instrument A, the connection state between the main body cylinder 10 and the detachable cylinder 20 is maintained by the pressure contact force between the plurality of projections 21 and the pressure contact surface 11a without unevenness. On the other hand, it is easy to remove or fit the detachable cylinder 20.
And since the structure of the protrusion 21 and the press-contact surface 11a is simple, the moldability of the main body cylinder 10 and the removable cylinder 20 is favorable.
In addition, since a plurality of protrusions are partially provided in the circumferential direction, for example, it is easy to obtain an appropriate fitting force as compared with a case where an annular protrusion is provided over the entire circumference.

すなわち、仮に、着脱筒20における突部21を全周へわたる環状突部(図示せず)に置換した場合には、該環状突部の突出寸法が周方向の全周にわたってばらつくため、該環状凸部の外周面の真円度を高く維持するのが困難な上、環状突部が周方向の全周にわたって圧接面に接触して、その接触面積が大きくなる。その結果、嵌合力が強すぎてしまう場合が多くなり、前記着脱筒の着脱が困難になり易い。
しかしながら、上記構成の着脱筒20によれば、突部21が周方向において断続的に配設されることになるため、各突部21の寸法精度を高く維持し易い上、複数の突部21と圧接面11aとの接触面積が小さい。したがって、各突部21の突出寸法の適宜な設定により、適当な嵌合力を得易く、着脱筒20の着脱が容易になる。
In other words, if the protrusion 21 in the detachable cylinder 20 is replaced with an annular protrusion (not shown) extending over the entire circumference, the projecting dimension of the annular protrusion varies over the entire circumference. It is difficult to maintain high roundness of the outer peripheral surface of the convex portion, and the annular protrusion comes into contact with the pressure contact surface over the entire circumference in the circumferential direction, and the contact area increases. As a result, there are many cases where the fitting force is too strong, and it is difficult to attach and detach the detachable cylinder.
However, according to the detachable cylinder 20 configured as described above, since the protrusions 21 are intermittently disposed in the circumferential direction, it is easy to maintain high dimensional accuracy of each protrusion 21 and a plurality of protrusions 21. And the pressure contact surface 11a have a small contact area. Therefore, an appropriate fitting force can be easily obtained and the detachable cylinder 20 can be easily attached and detached by appropriately setting the projecting dimension of each protrusion 21.

また、太書き側キャップ60の装着状態においては、該太書き側キャップ60が、本体筒10と着脱筒20との継ぎ目pよりも後端側(図1における下端側)で、環状突部62を本体筒10外周面の全周に接触させているため、該太書き側キャップ60内の密閉性が高い。ひいては、インク収容体30内のインクの揮発を防止することができる。   Further, when the bold side cap 60 is attached, the thick side cap 60 is located on the rear end side (lower end side in FIG. 1) of the annular tube 62 on the rear end side with respect to the joint p between the main body cylinder 10 and the detachable cylinder 20. Is in contact with the entire circumference of the outer peripheral surface of the main body cylinder 10, so that the tightness in the bold side cap 60 is high. As a result, volatilization of the ink in the ink container 30 can be prevented.

すなわち、仮に、本体筒10外周面と太書き側キャップ60内周面との密接箇所(詳細には密接部11b1と環状突部62との密接箇所)が、本体筒10と着脱筒20との継ぎ目pよりも前端側(着脱筒20側)に位置した場合には、その継ぎ目pや着脱筒20内の複数の突部21間の隙間等によって、内外に連通する通路が形成される。すると、その通路を通って、インク収容体30内で揮発したインクが外部へ流出してしまうおそれがある。
しかしながら、上記構成の筆記具Aによれば、本体筒10外周面と太書き側キャップ60との密接箇所が、本体筒10と着脱筒20との継ぎ目pよりも後端側(本体筒10側)に位置するため、前記のような通路が形成されることなく、その結果、インク収容体30の揮発を防止することができる。
That is, suppose that the intimate portion between the outer peripheral surface of the main body cylinder 10 and the inner peripheral surface of the thick side cap 60 (specifically, the intimate portion between the close portion 11b1 and the annular protrusion 62) is between the main body tube 10 and the removable cylinder 20. When located on the front end side (the detachable cylinder 20 side) with respect to the joint p, a passage communicating with the inside and the outside is formed by the joint p and gaps between the plurality of protrusions 21 in the detachable cylinder 20. Then, the ink that has volatilized in the ink container 30 may flow out to the outside through the passage.
However, according to the writing instrument A having the above-described configuration, the intimate location between the outer peripheral surface of the main body cylinder 10 and the thick side cap 60 is closer to the rear end (the main body cylinder 10 side) than the joint p between the main body cylinder 10 and the removable cylinder 20. As a result, the ink container 30 can be prevented from volatilizing.

更に、太書き側キャップ60の装着状態においては、落下等の不意の衝撃により着脱筒20に対し抜き方向(図1における上方)の力が作用したとしても、着脱筒20の当接部25が太書き側キャップ60内周面の被当接部63に当接するため、着脱筒20が本体筒10に対し抜き方向へずれてしまうのを防ぐことができる。   Further, when the bold side cap 60 is attached, even if a force in the pulling direction (upward in FIG. 1) acts on the removable cylinder 20 due to an unexpected impact such as dropping, the contact portion 25 of the removable cylinder 20 Since it contacts the contacted portion 63 on the inner peripheral surface of the bold side cap 60, it is possible to prevent the detachable cylinder 20 from being displaced in the pulling direction with respect to the main body cylinder 10.

次に、上記筆記具Aにおいて、着脱筒20を他の態様のものに置換した例について説明する。なお、以下に示す着脱筒20’や着脱筒20”は、上述した着脱筒20の構成を部分的に変更したものであるため、上記着脱筒20と略同様の構成箇所については、同一の符号を付けることで、重複する詳細説明を省略する。
図4に示す着脱筒20’は、その後端側の部分が多角形筒状に形成され、その外周面の各角部を、突部21’として用いるようにしている。
この着脱筒20’は、本体筒10に装着されると、外周面の角部分である各突部21’を、本体筒10の内周面に接触させる。その接触は、周方向において部分的な接触であって、且つ本体筒10及び着脱筒20の軸方向へわたる接触となる。
したがって、この着脱筒20’を用いた筆記具によれば、上記着脱筒20を用いた筆記具Aと略同様の作用効果を得ることができ、着脱筒20’の着脱性や成型性が良好である。
Next, in the writing instrument A, an example in which the removable cylinder 20 is replaced with another embodiment will be described. Note that the detachable cylinder 20 ′ and the detachable cylinder 20 ″ shown below are obtained by partially changing the configuration of the detachable cylinder 20 described above. The detailed description which overlaps is abbreviate | omitted.
In the detachable cylinder 20 ′ shown in FIG. 4, the rear end portion is formed in a polygonal cylinder shape, and each corner portion of the outer peripheral surface is used as the protrusion 21 ′.
When the detachable cylinder 20 ′ is attached to the main body cylinder 10, each protrusion 21 ′ that is a corner portion of the outer peripheral surface is brought into contact with the inner peripheral surface of the main body cylinder 10. The contact is a partial contact in the circumferential direction and a contact over the axial direction of the main body cylinder 10 and the detachable cylinder 20.
Therefore, according to the writing instrument using the detachable cylinder 20 ′, it is possible to obtain substantially the same effects as the writing instrument A using the detachable cylinder 20, and the detachability and moldability of the detachable cylinder 20 ′ are good. .

また、図5に示す着脱筒20”は、上記着脱筒20に対し、突部21を突部21”に置換し、更に、摘み部23を摘み部23”に置換した構成となっている。
複数の突部21”は、着脱筒20”の後端側の外周面において、スパイラル状の仮想線に沿って所定間隔置きに配置されている。
また、摘み部23”は、着脱筒20”の外周面であって本体筒10側で露出される部分に配置され、その外周面がローレット状に形成されている。
この着脱筒20”を用いた筆記具によれば、着脱筒20”を嵌脱する際、着脱筒20”を、複数の突部21”のスパイラル状の配置にならって回転させれば、本体筒10に対し着脱筒20”を引き抜いたり挿入したりする際の抵抗を比較的小さくすることができ、ひいては、着脱筒20の嵌脱作業を容易に行うことができる。
しかも、摘み部23”の外周面がローレット状に形成されているため、摘み部23”を摘んだ際の手等が滑り難く、着脱筒20”を回転させ易い。
なお、この着脱筒20”は、前記したように、本体筒10に対する着脱性を向上した一例としているが、成型性の観点からは、軸方向へ連続する突部21を有する上記着脱筒20の方が好ましい。
Further, the detachable cylinder 20 ″ shown in FIG. 5 has a configuration in which the protrusion 21 is replaced with the protrusion 21 ″ and the knob 23 is replaced with the knob 23 ″ with respect to the detachable cylinder 20.
The plurality of protrusions 21 ″ are arranged at predetermined intervals along the spiral imaginary line on the outer peripheral surface on the rear end side of the detachable cylinder 20 ″.
The knob 23 ″ is disposed on the outer peripheral surface of the detachable cylinder 20 ″ and exposed on the main body cylinder 10 side, and the outer peripheral surface is formed in a knurled shape.
According to the writing instrument using the detachable cylinder 20 ″, when the detachable cylinder 20 ″ is fitted and detached, if the detachable cylinder 20 ″ is rotated following the spiral arrangement of the plurality of protrusions 21 ″, the main body cylinder The resistance at the time of pulling out or inserting the detachable cylinder 20 ″ with respect to 10 can be made relatively small, and as a result, the detachable cylinder 20 can be easily fitted and detached.
In addition, since the outer peripheral surface of the knob portion 23 ″ is formed in a knurled shape, a hand or the like when the knob portion 23 ″ is picked is difficult to slide, and the removable cylinder 20 ″ can be easily rotated.
As described above, the detachable cylinder 20 ″ is an example in which the detachability with respect to the main body cylinder 10 is improved. However, from the viewpoint of moldability, the detachable cylinder 20 ″ has the protrusion 21 that is continuous in the axial direction. Is preferred.

また、上記実施の形態によれば、軸方向の両端にペン体を有する両頭式筆記具において、その一方のペン体側の先口と一体的に上記着脱筒20(又は20’,20”)を備え、該着脱筒を嵌脱してインク収容体30が交換される構造としたが、他の一例としては、軸方向の一端側にペン体を有するとともに他端側に尾栓を有する単頭式筆記具において、その他端側の尾栓と一体的に着脱筒(図示せず)を備え、該着脱筒を嵌脱してインク収容体30が交換される構造とすることも可能である。   Further, according to the above embodiment, in the double-headed writing instrument having pen bodies at both ends in the axial direction, the detachable cylinder 20 (or 20 ′, 20 ″) is provided integrally with the tip opening on one pen body side. The ink container 30 is exchanged by fitting and removing the detachable cylinder. As another example, a single-head writing instrument having a pen body on one end side in the axial direction and a tail plug on the other end side. In addition, it is also possible to provide a structure in which a removable cylinder (not shown) is provided integrally with the tail plug on the other end side, and the ink container 30 is exchanged by fitting and removing the removable cylinder.

また、上記実施の形態によれば、本体筒10に対し着脱筒20(又は、20’,20”)が挿入される構造としているが、着脱筒20(又は、20’,20”)に対し本体筒10が挿入される構造(図示せず)とすることも可能である。   Further, according to the above embodiment, the detachable cylinder 20 (or 20 ′, 20 ″) is inserted into the main body cylinder 10, but the detachable cylinder 20 (or 20 ′, 20 ″) is inserted. It is also possible to adopt a structure (not shown) in which the main body cylinder 10 is inserted.

また、上記実施の形態によれば、着脱筒20側に突部21(又は、21’,21”)を配置するとともに、本体筒10側に圧接面11aを配置するようにしたが、着脱筒20側に圧接面を配置するとともに、本体筒10側に突部を配置した構造(図示せず)とすることも可能である。   Further, according to the above embodiment, the protrusion 21 (or 21 ′, 21 ″) is arranged on the detachable cylinder 20 side and the press contact surface 11a is arranged on the main body cylinder 10 side. It is also possible to adopt a structure (not shown) in which a pressure contact surface is disposed on the 20 side and a protrusion is disposed on the main body cylinder 10 side.

本発明に係わる筆記具の一例を示す断面図であり、要部を拡大して示している。It is sectional drawing which shows an example of the writing instrument concerning this invention, and has expanded and showed the principal part. 図1における(II)-(II)線断面図である。It is the (II)-(II) sectional view taken on the line in FIG. 着脱筒の一例を示す斜視図である。It is a perspective view which shows an example of a detachable cylinder. 着脱筒の他例を示す斜視図である。It is a perspective view which shows the other example of a detachable cylinder. 着脱筒の他例を示す斜視図である。It is a perspective view which shows the other example of a detachable cylinder.

10:本体筒
11a:圧接面
11b:係合部
11b1:密接部
11b2:環状突部
20:着脱筒
21,21’,21”:突部
23,23”:摘み部
25:当接部
30:インク収容体
60:太書き側キャップ
61:突部
62:環状突部
63:被当接部
A:筆記具
10: Main body cylinder 11a: Press contact surface 11b: Engagement part 11b1: Close contact part 11b2: Annular protrusion 20: Detachable cylinders 21, 21 ′, 21 ″: Projection parts 23, 23 ″: Knob part 25: Contact part 30: Ink container 60: bold cap 61: protrusion 62: annular protrusion 63: contacted part A: writing instrument

Claims (4)

本体筒に対し着脱筒を軸方向へ嵌脱して、該本体筒及び/又は該着脱筒の内部のインク収容体を着脱するようにした筆記具であって、
前記本体筒と前記着脱筒との内、その一方の筒に、周方向において部分的に径方向へ突出する突部を複数設けるとともに、その他方の筒に、前記複数の突部に接触可能な凹凸の無い圧接面を設け、これら双方の筒を接続した際に、該突部と該圧接面とが径方向へ圧接し合うようにし
前記着脱筒を筆記先端側の先口部と一体的に形成するとともに、この先口部を着脱可能にキャップで覆い、
該キャップは、前記着脱筒から前記本体筒に跨って設けられるとともに、該キャップ内周面の環状突部を前記本体筒の外周面に対し全周にわたって密接させて、前記本体筒に対し抜き方向への移動が阻まれるように係合し、
さらに、該キャップは、該キャップ内において前記着脱筒が前記本体筒に対し抜き方向へずれてしまうのを防ぐように、前記着脱筒に対しその前方側から当接もしくは近接していることを特徴とする筆記具。
A writing instrument in which a detachable cylinder is fitted to and detached from a main body cylinder in an axial direction, and the main body cylinder and / or an ink container inside the detachable cylinder is attached and detached,
Of the main body cylinder and the detachable cylinder, one of the cylinders is provided with a plurality of protrusions that protrude partially in the radial direction in the circumferential direction, and the other cylinder can contact the plurality of protrusions. Provide a pressure contact surface without unevenness, and when connecting both of these tubes, the protrusion and the pressure contact surface are in pressure contact with each other in the radial direction ,
The detachable tube is formed integrally with the tip end portion on the writing tip side, and the tip end portion is detachably covered with a cap,
The cap is provided across the main body cylinder from the detachable cylinder, and an annular protrusion on the inner peripheral surface of the cap is closely attached to the outer peripheral surface of the main body cylinder over the entire circumference, so that the cap is removed from the main body cylinder. Engaged so that the movement to
Further, the cap is in contact with or close to the detachable cylinder from the front side so as to prevent the detachable cylinder from being displaced in the pulling direction with respect to the main body cylinder in the cap. A writing instrument.
前記着脱筒の内周面に、軸方向へわたる第一の突条を複数設け、これら第一の突条によって前記インク収容体を保持し、
前記本体筒内周面には、軸方向へわたる第二の突条を複数設け、これら第二の突条によって前記インク収容体を保持し、
前記第二の突条と前記インク収容体との嵌合力は、その求心方向への突出寸法を調整することにより、前記第一の突条と前記インク収容体との嵌合力よりも弱くなるように設定されていることを特徴とする請求項1記載の筆記具。
A plurality of first protrusions extending in the axial direction are provided on the inner peripheral surface of the removable cylinder, and the ink container is held by the first protrusions,
A plurality of second protrusions extending in the axial direction are provided on the inner peripheral surface of the main body cylinder, and the ink container is held by the second protrusions,
The fitting force between the second protrusion and the ink container is weaker than the fitting force between the first protrusion and the ink container by adjusting the projecting dimension in the centripetal direction. The writing instrument according to claim 1, wherein the writing instrument is set as follows .
上記各突部が軸方向へわたって連続的に設けられていることを特徴とする請求項1又は2記載の筆記具。 3. The writing instrument according to claim 1, wherein each of the protrusions is provided continuously in the axial direction . 上記着脱筒には、上記本体筒側で露出される外周面に、周方向へ略凹凸状となる摘み部が形成されていることを特徴とする請求項1乃至3何れか1項記載の筆記具。   The writing instrument according to any one of claims 1 to 3, wherein the detachable cylinder is formed with a knob portion that is substantially uneven in a circumferential direction on an outer peripheral surface exposed on the main body cylinder side. .
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US11667146B2 (en) 2018-06-29 2023-06-06 Kabushiki Kaisha Pilot Corporation Writing tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02144488U (en) * 1989-05-02 1990-12-07
JPH0675780U (en) * 1993-04-05 1994-10-25 パイロットインキ株式会社 Writing crown attachment structure
JP2589403Y2 (en) * 1993-04-05 1999-01-27 パイロットインキ株式会社 Replaceable ink tank writing instrument
JPH1148679A (en) * 1997-08-05 1999-02-23 Sakura Color Prod Corp Marking pen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02144488U (en) * 1989-05-02 1990-12-07
JPH0675780U (en) * 1993-04-05 1994-10-25 パイロットインキ株式会社 Writing crown attachment structure
JP2589403Y2 (en) * 1993-04-05 1999-01-27 パイロットインキ株式会社 Replaceable ink tank writing instrument
JPH1148679A (en) * 1997-08-05 1999-02-23 Sakura Color Prod Corp Marking pen

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