JP5367486B2 - Multi-core writing instrument - Google Patents

Multi-core writing instrument Download PDF

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JP5367486B2
JP5367486B2 JP2009171110A JP2009171110A JP5367486B2 JP 5367486 B2 JP5367486 B2 JP 5367486B2 JP 2009171110 A JP2009171110 A JP 2009171110A JP 2009171110 A JP2009171110 A JP 2009171110A JP 5367486 B2 JP5367486 B2 JP 5367486B2
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writing
display member
bodies
rear end
hole
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JP2011025441A (en
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正史 安藤
由明 大河原
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Pilot Ink Co Ltd
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Pilot Ink Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-core writing utensil capable of preventing a displaying member from being bent at the time of exchanging a writing body, and sufficiently visually recognizing a discriminative displaying part on the back end of a writing body under a condition that a pen-point is retracted. <P>SOLUTION: A plurality of the writing bodies 6 are movably stored in the back and forth direction in a shaft cylinder 2. Operating bodies 7 are connected to the back ends of the writing bodies 6. The operating bodies 7 are projected from window holes 41. Fitting holes 66 open ahead are provided at the front end parts of the operating bodies 6. The peripheral walls of the fitting holes 66 are formed of a transparent material. Displaying members 7 with discriminative displaying parts corresponding to the writing bodies 5 are fitted to the back end parts of the writing bodies 5. Under a condition that the back end parts of the writing bodies 5 and the operating bodies 6 are connected with each other, the displaying members 7 are inserted into the fitting holes 66 of the operating bodies 6, and the displaying members 7 are visually recognizable through the peripheral walls of the fitting holes 66. The back ends of the displaying members 7 of the writing bodies 5 under a pen-point retracted condition, are positioned ahead of the front ends of the window holes 41. The displaying members 7 are visually recognizable through transparent parts 43 of the side walls of the shaft cylinder 2 ahead of the window holes 41. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、多芯筆記具に関する。詳細には、軸筒内に複数の筆記体を収容した多芯筆記具に関する。 The present invention relates to a multi-core writing instrument. In detail, it is related with the multi-core writing instrument which accommodated the several writing body in the axial cylinder.

従来この種の多芯筆記具において、例えば、特許文献１には、各々の操作体に前後方向に縦孔を設け、少なくとも各々に縦孔の周壁を透明材料により形成し、各々の筆記体の後端部に識別表示部（例えばインキ色表示部）を有する表示部材を取り付け、各々の筆記体の後端部と各々の操作体との連結状態において、各々の筆記体の表示部材が各々の操作体の縦孔に挿入され、各々の識別表示部を各々の縦孔の周壁を介して視認可能に構成し、且つ、各々の識別表示部を各々の窓孔を介して視認可能に構成した多芯筆記具が記載されている。 Conventionally, in this type of multi-core writing instrument, for example, Patent Document 1 discloses that each operating body is provided with a vertical hole in the front-rear direction, and at least each of the peripheral walls of the vertical hole is formed of a transparent material. A display member having an identification display portion (for example, an ink color display portion) is attached to the end portion, and the display member of each cursive body operates in the connected state between the rear end portion of each cursive body and the respective operating body. Each of the identification display units is inserted into the vertical hole of the body, and each identification display unit is configured to be visible through the peripheral wall of each vertical hole, and each identification display unit is configured to be visible through each window hole. A core writing instrument is described.

特開２００９−１０７２２７号公報JP 2009-107227 A

前記特許文献１の多芯筆記具は、窓孔を介して表示部材の識別表示部を視認する構造であるため、表示部材が長手方向に比較的長くなり、筆記体の交換時に表示部材が折り曲がるおそれがある。 Since the multi-core writing instrument of Patent Document 1 has a structure in which the identification display portion of the display member is visually recognized through the window hole, the display member is relatively long in the longitudinal direction, and the display member is bent when the writing body is replaced. There is a fear.

本発明は、前記従来の問題点を解決するものであって、筆記体の交換時に表示部材が折り曲がることを防止でき、しかも、ペン先没入状態の筆記体後端の表示部材を十分に視認できる多芯筆記具を提供しようとするものである。尚、本発明において、「前」とはペン先側を指し、「後」とはその反対側を指す。本発明で、ペン先突出状態とは、ペン先が軸筒の前端孔から前方に突出した状態をいい、ペン先没入状態とは、ペン先が軸筒内部に没入した状態をいう。 The present invention solves the above-mentioned conventional problems, can prevent the display member from being bent when the cursive body is replaced, and sufficiently displays the display member at the rear end of the cursive body in the pen tip immersion state. It aims to provide a multi-core writing instrument that can be used. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side. In the present invention, the pen tip protruding state refers to a state where the pen tip protrudes forward from the front end hole of the shaft cylinder, and the pen tip immersed state refers to a state where the pen tip is immersed inside the shaft cylinder.

本願の第１の発明は、軸筒２内に複数の筆記体５を前後方向に移動可能に収容し、前記各々の筆記体５を弾発体により後方に付勢し、前記各々の筆記体５の後端に操作体６を連結し、軸筒２の側壁に前後方向に延びる複数の窓孔４１を径方向に貫設し、前記各々の窓孔４１から径方向外方に前記各々の操作体６を突出させ、一つの操作体６を窓孔４１に沿って前方にスライドさせることにより、その一つの操作体６に連結された筆記体５のペン先５１を軸筒２の前端孔から突出させるとともに、先に突出状態にあった他の筆記体５のペン先５１を軸筒２内に没入させる多芯筆記具であって、各々の操作体６の前端部に前方に開口する取付孔６６を設け、少なくとも各々の取付孔６６の周壁を透明材料により形成し、各々の筆記体５の後端部に各々の筆記体５に対応した識別表示部を有する表示部材７を取り付け、各々の筆記体５の後端部と各々の操作体６との連結状態において、前記各々の表示部材７が各々の操作体６の取付孔６６に嵌入され、各々の表示部材７が各々の取付孔６６の周壁を介して視認可能に構成され、ペン先没入状態における各々の筆記体５の表示部材７の後端が、窓孔４１の前端より前方に位置するか又は窓孔４１の前端と一致し、前記各々の窓孔４１よりも前方の軸筒２側壁に透視部４３を設け、前記透視部４３を介して各々の表示部材７を視認可能に構成したことを要件とする。 1st invention of this application accommodates the some writing body 5 in the axial cylinder 2 so that a movement to the front-back direction is possible, and urges | biases each said writing body 5 back by the elastic body, Each said writing body The operating body 6 is connected to the rear end of the shaft 5, a plurality of window holes 41 extending in the front-rear direction are provided in the side wall of the shaft cylinder 2 in the radial direction, and each of the window holes 41 is radially outward from the window holes 41. By projecting the operating body 6 and sliding one operating body 6 forward along the window hole 41, the pen tip 51 of the writing body 5 connected to the one operating body 6 is moved to the front end hole of the shaft cylinder 2. And a multi-core writing instrument that immerses the pen tip 51 of the other writing body 5 that has been in the protruding state into the shaft cylinder 2 and opens forward at the front end of each operating body 6 A hole 66 is provided, and at least the peripheral wall of each mounting hole 66 is formed of a transparent material. A display member 7 having an identification display portion corresponding to each cursive body 5 is attached, and in the connected state of the rear end portion of each cursive body 5 and each operating body 6, each of the display members 7 performs each operation. The display member 7 is inserted into the attachment hole 66 of the body 6 so that each display member 7 is visible through the peripheral wall of each attachment hole 66, and the rear end of the display member 7 of each writing body 5 in the pen tip immersion state is The see-through portion 43 is provided on the side wall of the shaft cylinder 2 that is located in front of the front end of the window hole 41 or coincides with the front end of the window hole 41 and is in front of each of the window holes 41, and through the see-through portion 43. It is a requirement that each display member 7 is configured to be visible.

前記第１の発明の多芯筆記具１は、ペン先没入状態における各々の筆記体５の表示部材７の後端が、窓孔４１の前端より前方に位置するか又は窓孔４１の前端と一致してなることにより、表示部材７の長手寸法を比較的短くすることができ、筆記体５の交換時に表示部材７が折り曲がることを防止できる。また、前記第１の発明の多芯筆記具１は、表示部材７全体を短寸化でき、表示部材７の材料コストを低減させることができる。さらに、前記第１の発明の多芯筆記具１は、前記各々の窓孔４１よりも前方の軸筒２側壁（即ち各々の窓孔４１前端よりも前方の軸筒２側壁）に透視部４３を設け、前記透視部４３を介して、ペン先没入状態の筆記体５後端の表示部材７（識別表示部）を十分に視認できる。尚、本発明で、透明とは、無色透明、半透明、または着色透明をいう。 In the multi-core writing instrument 1 according to the first aspect of the present invention, the rear end of the display member 7 of each writing body 5 in the pen tip immersing state is located in front of the front end of the window hole 41 or is flush with the front end of the window hole 41. As a result, the longitudinal dimension of the display member 7 can be made relatively short, and the display member 7 can be prevented from being bent when the writing body 5 is replaced. Moreover, the multi-core writing instrument 1 of the first invention can shorten the entire display member 7 and can reduce the material cost of the display member 7. Further, the multi-core writing instrument 1 according to the first aspect of the present invention has the see-through portion 43 on the shaft cylinder 2 side wall in front of each of the window holes 41 (that is, the shaft cylinder 2 side wall in front of the front end of each window hole 41). And the display member 7 (identification display part) at the rear end of the pendant-immersed writing body 5 can be sufficiently visually recognized through the fluoroscopic part 43. In the present invention, transparent means colorless and transparent, translucent or colored and transparent.

本願の第２の発明は、前記第１の発明の多芯筆記具１において、少なくとも窓孔４１よりも前方の軸筒２側壁（即ち少なくとも窓孔４１前端よりも前方の軸筒２側壁）を透明材料から形成することによって透視部４３が構成されることを要件とする。 According to a second invention of the present application, in the multi-core writing instrument 1 of the first invention, at least the shaft cylinder 2 side wall in front of the window hole 41 (that is, at least the axis cylinder 2 side wall in front of the front end of the window hole 41) is transparent. It is a requirement that the see-through portion 43 is formed by forming from a material.

前記第２の発明の多芯筆記具１は、透視部４３を介して十分に表示部材７（識別表示部）を視認できる。 The multi-core writing instrument 1 according to the second aspect of the present invention can sufficiently recognize the display member 7 (identification display unit) through the see-through unit 43.

本願の第３の発明は、前記第１の発明の多芯筆記具１において、窓孔４１よりも前方の軸筒２側壁（即ち窓孔４１前端よりも前方の軸筒２側壁）に径方向に貫通する小孔を形成することによって透視部４３が構成されることを要件とする。 According to a third invention of the present application, in the multi-core writing instrument 1 of the first invention, the shaft cylinder 2 side wall in front of the window hole 41 (that is, the shaft cylinder 2 side wall in front of the front end of the window hole 41) in the radial direction. It is a requirement that the see-through portion 43 is formed by forming a small hole that penetrates.

前記第３の発明の多芯筆記具１は、透視部４３を介して十分に表示部材７（識別表示部）を視認できる。 The multi-core writing instrument 1 according to the third aspect of the present invention can sufficiently recognize the display member 7 (identification display unit) through the see-through unit 43.

（識別表示部）
尚、本発明で、前記識別表示部は、インキ色表示、ペン先サイズ表示、ペン先種類表示、または筆跡幅表示等が挙げられる。前記インキ色表示は、筆記体５内に収容されたインキの色を表示する。前記ペン先サイズ表示は、筆記体５前端のペン先のサイズを表示する。前記ペン先種類表示は、筆記体５前端のペン先の種類を表示する。前記筆跡幅表示は、筆記体５のペン先による筆跡の幅を表示する。 (Identification display part)
In the present invention, examples of the identification display unit include ink color display, pen tip size display, pen tip type display, and handwriting width display. The ink color display displays the color of the ink accommodated in the cursive body 5. The nib size display indicates the size of the nib at the front end of the cursive body 5. The nib type display indicates the type of nib at the front end of the cursive body 5. The handwriting width display displays the width of the handwriting by the pen tip of the cursive body 5.

本発明の多芯筆記具によれば、筆記体の交換時に表示部材が折り曲がることを防止でき、しかも、ペン先没入状態の筆記体後端の表示部材を十分に視認できる。 According to the multi-core writing instrument of the present invention, it is possible to prevent the display member from being bent at the time of exchanging the cursive body, and it is possible to sufficiently visually recognize the display member at the rear end of the cursive body that is in the pen tip immersion state.

本発明の第１の実施の形態の正面図である。It is a front view of the 1st Embodiment of this invention. 図１の分離状態を示す正面図である。It is a front view which shows the isolation | separation state of FIG. 図１及び図６の操作体と筆記体の連結状態を示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the connection state of the operation body and writing body of FIG.1 and FIG.6. 図１及び図６の操作体と筆記体の連結状態を示す要部正面図である。It is a principal part front view which shows the connection state of the operation body and writing body of FIG.1 and FIG.6. 図１及び図６の操作体と筆記体の分離状態を示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the isolation | separation state of the operation body and writing body of FIG.1 and FIG.6. 本発明の第２の実施の形態の正面図である。It is a front view of the 2nd Embodiment of this invention. 図１の分離状態を示す正面図である。It is a front view which shows the isolation | separation state of FIG.

＜第１の実施の形態＞
図１乃至図５に本発明の第１の実施の形態を示す。
図１は、本実施の形態のペン先没入状態を示す。図２は、筆記体５と軸筒２との分離状態を示す。図３及び図４は、軸筒２を省略し、操作体６と筆記体５との連結状態を説明するものである。図５は、軸筒２を省略し、操作体６と筆記体５との分離状態を説明するものである。 <First Embodiment>
1 to 5 show a first embodiment of the present invention.
FIG. 1 shows the pen tip immersion state of the present embodiment. FIG. 2 shows a separated state of the cursive body 5 and the shaft cylinder 2. 3 and 4 illustrate the connection state between the operating body 6 and the writing body 5 with the shaft cylinder 2 omitted. FIG. 5 illustrates a state where the operation body 6 and the writing body 5 are separated from each other, with the shaft cylinder 2 omitted.

本実施の形態の多芯筆記具１は、軸筒２内に複数本（例えば２本〜４本）の筆記体５が前後方向に移動可能に収容されている。前記各々の筆記体５は、各々の弾発体８（具体的には圧縮コイルスプリング）により、後方に付勢されている。 In the multi-core writing instrument 1 of the present embodiment, a plurality of (for example, two to four) writing bodies 5 are accommodated in a shaft tube 2 so as to be movable in the front-rear direction. Each of the writing bodies 5 is urged rearward by each of the elastic bodies 8 (specifically, compression coil springs).

（軸筒）
前記軸筒２は、先細状の円筒体からなる前軸３と、該前軸３の後端部と螺合または嵌合により取り付けられる円筒状の後軸４とからなる。前記前軸３の前端には、各々の筆記体５のペン先５１が突出可能な前端孔が軸方向に貫設される。前記前軸３及び後軸４は、合成樹脂（例えば、ポリカーボネイト等）の射出成形により得られる。前記後軸４の後部の側壁には、複数本（収容する筆記体５の本数に応じた本数）の前後方向に延びる細長状の窓孔４１が、径方向に貫設される。前記後軸４の窓孔４１の相互間の側壁外面には、クリップ４２が設けられる。 (Shaft tube)
The shaft cylinder 2 includes a front shaft 3 made of a tapered cylindrical body, and a cylindrical rear shaft 4 attached to the rear end portion of the front shaft 3 by screwing or fitting. At the front end of the front shaft 3, a front end hole through which the pen tip 51 of each writing body 5 can project is provided in the axial direction. The front shaft 3 and the rear shaft 4 are obtained by injection molding of a synthetic resin (for example, polycarbonate). A plurality of elongated window holes 41 extending in the front-rear direction (the number corresponding to the number of cursive bodies 5 to be accommodated) are provided in a radial direction in the rear side wall of the rear shaft 4. A clip 42 is provided on the outer surface of the side wall between the window holes 41 of the rear shaft 4.

前記前軸３は不透明な合成樹脂により形成され、前記後軸４は透明材料（例えば、無色透明、半透明または有色透明の合成樹脂）により形成される。前記後軸４を透明材料により形成したことにより、後軸４の内部を外部より視認可能となり、少なくとも各々の窓孔４１前端よりも前方の軸筒２の側壁には透視部４３が形成される。尚、これ以外にも、本発明では、軸筒２全体（前軸３及び後軸４）を透明材料（例えば、無色透明、半透明または有色透明の合成樹脂）により形成してもよい。 The front shaft 3 is formed of an opaque synthetic resin, and the rear shaft 4 is formed of a transparent material (for example, a colorless transparent, translucent or colored transparent synthetic resin). By forming the rear shaft 4 from a transparent material, the inside of the rear shaft 4 can be visually recognized from the outside, and a see-through portion 43 is formed at least on the side wall of the shaft cylinder 2 ahead of the front end of each window hole 41. . In addition to this, in the present invention, the entire shaft cylinder 2 (front shaft 3 and rear shaft 4) may be formed of a transparent material (for example, a colorless, transparent, translucent or colored transparent synthetic resin).

（筆記体）
前記各々の筆記体５は、ボールペンレフィルであり、前端にボールが回転可能に抱持されたボールペンチップ（即ちペン先５１）と、該ボールペンチップを前端に備え且つ後端が開口されたインキ収容管５２とからなる。本実施の形態では、インキ収容管５２は、透明材料（例えば、無色透明、半透明または有色透明の合成樹脂）により構成される。 (Cursive)
Each of the cursive bodies 5 is a ballpoint pen refill, and includes a ballpoint pen tip (that is, a pen tip 51) in which a ball is rotatably held at the front end, and an ink container having the ballpoint pen tip at the front end and having an open rear end. A tube 52. In the present embodiment, the ink containing tube 52 is made of a transparent material (for example, a colorless, transparent, translucent or colored transparent synthetic resin).

前記インキ収容管５２の内部には、剪断減粘性を有する水性ゲルインキ、低粘度の水性インキ、低粘度の油性インキ、または高粘度の油性インキからなるインキが収容される。前記インキが、剪断減粘性を有する水性ゲルインキ、低粘度の水性インキ、または低粘度の油性インキの場合、インキ収容管５２内のインキの後端には、インキの消費に伴い前進する高粘度流体からなる追従体が充填される。 Inside the ink storage tube 52, an ink composed of a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, a low-viscosity oil-based ink, or a high-viscosity oil-based ink is stored. When the ink is a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, or a low-viscosity oil-based ink, a high-viscosity fluid that moves forward as the ink is consumed at the rear end of the ink in the ink containing tube 52 A follower consisting of is filled.

また、前記水性ゲルインキ、低粘度の水性インキ、低粘度の油性インキをインキ収容管５２内に収容する場合、その前端に取り付けられる前記ボールペンチップは、前端に回転可能に抱持されたボールを弾発体等により前方に付勢し、前端縁部の内面にボールを密接させる構成が採用される。また、ボールペンチップは、インキ収容管５２の前端開口部に圧入等により直接、取り付けてもよいが、本実施の形態ではペン先ホルダーを介してインキ収容管５２の前端開口部に固着される。 Further, when the water-based gel ink, the low-viscosity water-based ink, and the low-viscosity oil-based ink are stored in the ink storage tube 52, the ball-point pen tip attached to the front end of the ball-point pen tip elastically holds the ball held at the front end. A configuration is adopted in which the ball is urged forward by a foaming body and the ball is brought into close contact with the inner surface of the front end edge portion. Further, the ballpoint pen tip may be directly attached to the front end opening of the ink containing tube 52 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 52 via the pen tip holder.

（表示部材）
前記インキ収容管５２の後端部開口部内面には、表示部材７の前端部７１が圧入固着される。前記表示部材７の前端部７１より後方には、鍔状の係止部７２が一体に形成される。前記係止部７２の後方には、棒状の後端部７３が一体に形成される。前記係止部７２及び後端部７３が、筆記体５後端（インキ収容管５２後端）より後方に突出される。前記表示部材７は、インキ収容管５２内のインキの色と略同じ色に着色され、前記表示部材７全体が識別表示部（インキ色表示）を構成する。前記表示部材７の外径（即ち、前端部７１の外径、係止部７２の外径、及び後端部７３の外径）は、筆記体５の外径（インキ収容管５２の外径）より小さく設定される。 (Display material)
The front end 71 of the display member 7 is press-fitted and fixed to the inner surface of the rear end opening of the ink containing tube 52. A hook-like locking portion 72 is integrally formed behind the front end portion 71 of the display member 7. A rod-shaped rear end portion 73 is integrally formed behind the locking portion 72. The locking portion 72 and the rear end portion 73 protrude rearward from the rear end of the writing body 5 (rear end of the ink containing tube 52). The display member 7 is colored in substantially the same color as the color of the ink in the ink containing tube 52, and the entire display member 7 constitutes an identification display portion (ink color display). The outer diameter of the display member 7 (that is, the outer diameter of the front end portion 71, the outer diameter of the locking portion 72, and the outer diameter of the rear end portion 73) is the outer diameter of the writing body 5 (the outer diameter of the ink containing tube 52). ) Is set smaller.

（操作体）
前記各々の筆記体５の後端（即ちインキ収容管５２の後端）には、操作体６が取り付けられる。前記各々の操作体６の全体は、無色透明の合成樹脂（例えば、ポリカーボネイト、ＡＢＳ樹脂、ポリエチレンテレフタレート、ポリプロピレン等）により形成される。前記各々の操作体６の外面には、後端部に形成され且つ軸筒２の窓孔４１から外部に突出する操作部６１と、該操作部６１の反対側に設けられる後側突出部６３と、該操作部６１の反対側の後側突出部６３の前方に設けられる前側突出部６２と、前端部に形成される鍔部６４とが一体に形成される。また、前記各々の操作体６の前端部には、前方に開口する取付孔６６が形成される。 (Operation body)
An operation body 6 is attached to the rear end of each of the writing bodies 5 (that is, the rear end of the ink containing tube 52). The whole of each operation body 6 is formed of a colorless and transparent synthetic resin (for example, polycarbonate, ABS resin, polyethylene terephthalate, polypropylene, etc.). On the outer surface of each operation body 6, an operation portion 61 is formed at the rear end portion and protrudes to the outside from the window hole 41 of the shaft cylinder 2, and a rear protrusion portion 63 provided on the opposite side of the operation portion 61. And the front side protrusion part 62 provided in front of the rear side protrusion part 63 on the opposite side of the operation part 61 and the flange part 64 formed at the front end part are integrally formed. Further, a mounting hole 66 opening forward is formed at the front end of each operating body 6.

前記各々の取付孔６６に、前記各々の筆記体５の表示部材７（識別表示部）の棒状の後端部７３外面が嵌入される。前記各々の表示部材７の後端部が、各々の取付孔６６の透明な周壁を通して外部より視認可能となる。前記各々の取付孔６６に前記表示部材７のみが嵌入され、前記各々の取付孔６６には筆記体５の後端部は挿入されない。前記表示部材の係止部７２の前面がインキ収容管５２の後端に当接され、前記表示部材の係止部７２の後面が操作体６の前端に当接される。 The outer surface of the rod-shaped rear end portion 73 of the display member 7 (identification display portion) of each of the writing bodies 5 is fitted into each of the mounting holes 66. The rear end portions of the display members 7 can be visually recognized from the outside through the transparent peripheral walls of the mounting holes 66. Only the display member 7 is inserted into each of the mounting holes 66, and the rear end portion of the writing body 5 is not inserted into each of the mounting holes 66. The front surface of the locking portion 72 of the display member is brought into contact with the rear end of the ink containing tube 52, and the rear surface of the locking portion 72 of the display member is brought into contact with the front end of the operation body 6.

前記表示部材７の前端部７１と筆記体５（インキ収容管５２）の後端開口部との固着は、前記表示部材７の後端部７３と操作体６の取付孔６６との間の嵌合よりも、強く固着され、それにより、筆記体５の交換時、操作体６から表示部材７を容易に取り除くことができる。また、前記表示部材７の後端部７３の外面に外向突起（例えば、環状突起または複数個が周状に分散される突起）を設け、前記操作体６の取付孔６６の内面に、前記後端部７３外面の外向突起（例えば、複数個が周状に分散される突起または環状突起）と乗り越え嵌合可能な内向突起を設けてもよい。それにより、表示部材７の前端部７１と操作体６の取付孔６６との容易な着脱が可能となる。 Adherence between the front end 71 of the display member 7 and the rear end opening of the writing body 5 (ink containing tube 52) is a fit between the rear end 73 of the display member 7 and the mounting hole 66 of the operating body 6. The display member 7 can be easily removed from the operating body 6 when the writing body 5 is replaced. Further, an outward projection (for example, an annular projection or a projection in which a plurality of circumferential projections are dispersed) is provided on the outer surface of the rear end portion 73 of the display member 7, and the rear surface of the mounting hole 66 of the operating body 6 is provided with the rear projection. You may provide the inward protrusion which can get over and fit with the outward protrusion (for example, the protrusion or annular protrusion in which a plurality is distributed in the shape of a circumference) of the end 73 outer surface. Thereby, the front end 71 of the display member 7 and the attachment hole 66 of the operation body 6 can be easily attached and detached.

前記各々の操作体６の鍔部６４の前面には、各々の弾発体８の後端が係止される。また、前記各々の操作体６の両方の側面には抜け止め突起６５が形成される。前記抜け止め突起６５は窓孔４１の両方の側壁内面に係合可能である。 The rear ends of the respective elastic bodies 8 are locked to the front surface of the collar portion 64 of each operation body 6. Further, a retaining protrusion 65 is formed on both side surfaces of each operation body 6. The retaining protrusion 65 can be engaged with the inner surfaces of both side walls of the window hole 41.

ペン先没入状態にある筆記体５の後端に連結された操作体６の前側突出部６２は、その操作体６の操作部６１を前方にスライド操作した際、先にペン先突出状態にある他の筆記体５の後端に連結された操作体６の後側突出部６３と当接され、他の筆記体５のペン先突出状態が解除される。 The front projecting portion 62 of the operating body 6 connected to the rear end of the writing body 5 in the pen tip immersing state is in a pen tip protruding state when the operating portion 61 of the operating body 6 is slid forward. The pendant protruding state of the other writing object 5 is released by coming into contact with the rear protrusion 63 of the operating body 6 connected to the rear end of the other writing object 5.

ペン先没入状態における各々の筆記体５の表示部材７の後端は、窓孔４１の前端より前方に位置するか又は窓孔４１の前端と一致する。即ち、ペン先没入状態における各々の筆記体５の表示部材７の後端（具体的には後端部７３の後端）は、窓孔４１から後方に突出せず、窓孔４１を介して視認できない。 The rear end of the display member 7 of each cursive body 5 in the pen tip immersion state is located in front of the front end of the window hole 41 or coincides with the front end of the window hole 41. That is, the rear end (specifically, the rear end of the rear end portion 73) of the display member 7 of each writing body 5 in the pen tip immersion state does not protrude rearward from the window hole 41 and passes through the window hole 41. Cannot be seen.

（筆記体の交換）
本実施の形態の多芯筆記具１において、図２に示すように、筆記体５を交換する際、前軸３と後軸４とを分離し、筆記体５の後端部の表示部材７（識別表示部）を操作体６の取付孔６６から抜き取り、その後、新たな筆記体５の後端部の表示部材７（識別表示部）を操作体６の取付孔６６に嵌入する。 (Replace cursive)
In the multi-core writing instrument 1 of the present embodiment, as shown in FIG. 2, when the writing body 5 is replaced, the front shaft 3 and the rear shaft 4 are separated, and the display member 7 ( The identification display portion) is extracted from the mounting hole 66 of the operating body 6, and then the display member 7 (identification display portion) at the rear end of the new writing body 5 is inserted into the mounting hole 66 of the operating body 6.

（本実施の形態の作用効果）
本実施の形態の多芯筆記具１は、ペン先没入状態における各々の筆記体５の表示部材７の後端が、窓孔４１の前端より前方に位置するか又は窓孔４１の前端と一致してなることにより、表示部材７の長手寸法を比較的短くすることができ、筆記体５の交換時に表示部材７が折り曲がることを防止できる。また、本実施の形態の多芯筆記具１は、表示部材７全体を短寸化でき、表示部材７の材料コストを低減させることができる。さらに、本実施の形態の多芯筆記具１は、前記各々の窓孔４１よりも前方の軸筒２側壁に透視部４３を設け、前記透視部４３を介して、ペン先没入状態の筆記体５後端の表示部材７（識別表示部）を十分に視認できる。特に、本実施の形態の多芯筆記具１は、操作体６を透明材料により形成し、且つ、インキ収容管５２を透明材料により形成し、且つ、後軸４全体を透明材料により形成したことにより、表示部材７全体が外部より視認可能となる。 (Operational effect of the present embodiment)
In the multi-core writing instrument 1 of the present embodiment, the rear end of the display member 7 of each writing body 5 in the pen tip immersion state is located in front of the front end of the window hole 41 or coincides with the front end of the window hole 41. Thus, the longitudinal dimension of the display member 7 can be made relatively short, and the display member 7 can be prevented from being bent when the writing body 5 is replaced. Moreover, the multi-core writing instrument 1 of this Embodiment can shorten the whole display member 7, and can reduce the material cost of the display member 7. FIG. Further, the multi-core writing instrument 1 of the present embodiment is provided with a see-through portion 43 on the side wall of the shaft cylinder 2 in front of each of the window holes 41, and the pen-immersed writing material 5 is inserted through the see-through portion 43. The display member 7 (identification display part) at the rear end can be sufficiently visually recognized. In particular, the multi-core writing instrument 1 of the present embodiment is formed by forming the operating body 6 from a transparent material, forming the ink containing tube 52 from a transparent material, and forming the entire rear shaft 4 from a transparent material. The entire display member 7 is visible from the outside.

＜第２の実施の形態＞
図６、図７、図３、図４、及び図５に本発明の第２の実施の形態を示す。図３、図４、図５は第１の実施の形態と共通である。図６は、本実施の形態のペン先没入状態を示す。図７は、筆記体５と軸筒２との分離状態を示す。図３及び図４は、軸筒２を省略し、操作体６と筆記体５との連結状態を説明するものである。図５は、軸筒２を省略し、操作体６と筆記体５との分離状態を説明するものである。 <Second Embodiment>
6, FIG. 7, FIG. 3, FIG. 4 and FIG. 5 show a second embodiment of the present invention. 3, 4 and 5 are common to the first embodiment. FIG. 6 shows the pen tip immersion state of the present embodiment. FIG. 7 shows a separated state of the cursive body 5 and the shaft cylinder 2. 3 and 4 illustrate the connection state between the operating body 6 and the writing body 5 with the shaft cylinder 2 omitted. FIG. 5 illustrates a state where the operation body 6 and the writing body 5 are separated from each other, with the shaft cylinder 2 omitted.

本実施の形態の多芯筆記具１は、軸筒２内に複数本（例えば２本〜４本）の筆記体５が前後方向に移動可能に収容されている。前記各々の筆記体５は、各々の弾発体８（具体的には圧縮コイルスプリング）により、後方に付勢されている。 In the multi-core writing instrument 1 of the present embodiment, a plurality of (for example, two to four) writing bodies 5 are accommodated in a shaft tube 2 so as to be movable in the front-rear direction. Each of the writing bodies 5 is urged rearward by each of the elastic bodies 8 (specifically, compression coil springs).

（軸筒）
前記軸筒２は、先細状の円筒体からなる前軸３と、該前軸３の後端部と螺合または嵌合により取り付けられる円筒状の後軸４とからなる。前記前軸３の前端には、各々の筆記体５のペン先５１が突出可能な前端孔が軸方向に貫設される。前記前軸３及び後軸４は、合成樹脂（例えば、ポリカーボネイト等）の射出成形により得られる。前記後軸４の後部の側壁には、複数本（収容する筆記体５の本数に応じた本数）の前後方向に延びる細長状の窓孔４１が、径方向に貫設される。前記後軸４の窓孔４１の相互間の側壁外面には、クリップ４２が設けられる。 (Shaft tube)
The shaft cylinder 2 includes a front shaft 3 made of a tapered cylindrical body, and a cylindrical rear shaft 4 attached to the rear end portion of the front shaft 3 by screwing or fitting. At the front end of the front shaft 3, a front end hole through which the pen tip 51 of each writing body 5 can project is provided in the axial direction. The front shaft 3 and the rear shaft 4 are obtained by injection molding of a synthetic resin (for example, polycarbonate). A plurality of elongated window holes 41 extending in the front-rear direction (the number corresponding to the number of cursive bodies 5 to be accommodated) are provided in a radial direction in the rear side wall of the rear shaft 4. A clip 42 is provided on the outer surface of the side wall between the window holes 41 of the rear shaft 4.

前記前軸３及び前記後軸４は不透明な合成樹脂により形成される。前記各々の窓孔４１前端よりも前方の後軸４の側壁には、小孔（具体的には円形の小孔）よりなる透視部４３が形成される。前記小孔の形状は、円形の他、楕円形、三角形、四角形、多角形、直線状スリット、屈曲状スリット、曲線状スリット、あるいはこれらの組合せ等、何れであってもよい。また、前記小孔は、窓孔４１と連通していてもよい。前記小孔が窓孔４１と連通する場合、前記小孔の幅寸法は、窓孔４１の幅寸法より小さく設定される。また、前記小孔は複数、設けてもよい。 The front shaft 3 and the rear shaft 4 are formed of an opaque synthetic resin. A see-through portion 43 made of a small hole (specifically, a circular small hole) is formed on the side wall of the rear shaft 4 in front of the front end of each window hole 41. The shape of the small hole may be any of an ellipse, a triangle, a quadrangle, a polygon, a linear slit, a bent slit, a curved slit, or a combination thereof, in addition to a circle. The small hole may communicate with the window hole 41. When the small hole communicates with the window hole 41, the width dimension of the small hole is set smaller than the width dimension of the window hole 41. A plurality of the small holes may be provided.

（筆記体）
前記各々の筆記体５は、ボールペンレフィルであり、前端にボールが回転可能に抱持されたボールペンチップ（即ちペン先５１）と、該ボールペンチップを前端に備え且つ後端が開口されたインキ収容管５２とからなる。本実施の形態では、インキ収容管５２は、透明または半透明の合成樹脂により構成される。 (Cursive)
Each of the cursive bodies 5 is a ballpoint pen refill, and includes a ballpoint pen tip (that is, a pen tip 51) in which a ball is rotatably held at the front end, and an ink container having the ballpoint pen tip at the front end and having an open rear end. A tube 52. In the present embodiment, the ink containing tube 52 is made of a transparent or translucent synthetic resin.

前記インキ収容管５２の内部には、剪断減粘性を有する水性ゲルインキ、低粘度の水性インキ、低粘度の油性インキ、または高粘度の油性インキからなるインキが収容される。前記インキが、剪断減粘性を有する水性ゲルインキ、低粘度の水性インキ、または低粘度の油性インキの場合、インキ収容管５２内のインキの後端には、インキの消費に伴い前進する高粘度流体からなる追従体が充填される。 Inside the ink storage tube 52, an ink composed of a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, a low-viscosity oil-based ink, or a high-viscosity oil-based ink is stored. When the ink is a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, or a low-viscosity oil-based ink, a high-viscosity fluid that moves forward as the ink is consumed at the rear end of the ink in the ink containing tube 52 A follower consisting of is filled.

また、前記水性ゲルインキ、低粘度の水性インキ、低粘度の油性インキをインキ収容管５２内に収容する場合、その前端に取り付けられる前記ボールペンチップは、前端に回転可能に抱持されたボールを弾発体等により前方に付勢し、前端縁部の内面にボールを密接させる構成が採用される。また、ボールペンチップは、インキ収容管５２の前端開口部に圧入等により直接、取り付けてもよいが、本実施の形態ではペン先ホルダーを介してインキ収容管５２の前端開口部に固着される。 Further, when the water-based gel ink, the low-viscosity water-based ink, and the low-viscosity oil-based ink are stored in the ink storage tube 52, the ball-point pen tip attached to the front end of the ball-point pen tip elastically holds the ball held at the front end. A configuration is adopted in which the ball is urged forward by a foaming body and the ball is brought into close contact with the inner surface of the front end edge portion. Further, the ballpoint pen tip may be directly attached to the front end opening of the ink containing tube 52 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 52 via the pen tip holder.

（表示部材）
前記インキ収容管５２の後端部開口部内面には、表示部材７の前端部７１が圧入固着される。前記表示部材７の前端部７１より後方には、鍔状の係止部７２が一体に形成される。前記係止部７２の後方には、棒状の後端部７３が一体に形成される。前記係止部７２及び後端部７３が、筆記体５後端（インキ収容管５２後端）より後方に突出される。前記表示部材７は、インキ収容管５２内のインキの色と略同じ色に着色され、前記表示部材７全体が識別表示部（インキ色表示）を構成する。前記表示部材７の外径（即ち、前端部７１の外径、係止部７２の外径、及び後端部７３の外径）は、筆記体５の外径（インキ収容管５２の外径）より小さく設定される。 (Display material)
The front end 71 of the display member 7 is press-fitted and fixed to the inner surface of the rear end opening of the ink containing tube 52. A hook-like locking portion 72 is integrally formed behind the front end portion 71 of the display member 7. A rod-shaped rear end portion 73 is integrally formed behind the locking portion 72. The locking portion 72 and the rear end portion 73 protrude rearward from the rear end of the writing body 5 (rear end of the ink containing tube 52). The display member 7 is colored in substantially the same color as the color of the ink in the ink containing tube 52, and the entire display member 7 constitutes an identification display portion (ink color display). The outer diameter of the display member 7 (that is, the outer diameter of the front end portion 71, the outer diameter of the locking portion 72, and the outer diameter of the rear end portion 73) is the outer diameter of the writing body 5 (the outer diameter of the ink containing tube 52). ) Is set smaller.

（操作体）
前記各々の筆記体５の後端（即ちインキ収容管５２の後端）には、操作体６が取り付けられる。前記各々の操作体６の全体は、無色透明の合成樹脂（例えば、ポリカーボネイト、ＡＢＳ樹脂、ポリエチレンテレフタレート、ポリプロピレン等）により形成される。前記各々の操作体６の外面には、後端部に形成され且つ軸筒２の窓孔４１から外部に突出する操作部６１と、該操作部６１の反対側に設けられる後側突出部６３と、該操作部６１の反対側の後側突出部６３の前方に設けられる前側突出部６２と、前端部に形成される鍔部６４とが一体に形成される。また、前記各々の操作体６の前端部には、前方に開口する取付孔６６が形成される。 (Operation body)
An operation body 6 is attached to the rear end of each of the writing bodies 5 (that is, the rear end of the ink containing tube 52). The whole of each operation body 6 is formed of a colorless and transparent synthetic resin (for example, polycarbonate, ABS resin, polyethylene terephthalate, polypropylene, etc.). On the outer surface of each operation body 6, an operation portion 61 is formed at the rear end portion and protrudes to the outside from the window hole 41 of the shaft cylinder 2, and a rear protrusion portion 63 provided on the opposite side of the operation portion 61. And the front side protrusion part 62 provided in front of the rear side protrusion part 63 on the opposite side of the operation part 61 and the flange part 64 formed at the front end part are integrally formed. Further, a mounting hole 66 opening forward is formed at the front end of each operating body 6.

前記各々の取付孔６６に、前記各々の筆記体５の表示部材７（識別表示部）の棒状の後端部７３外面が嵌入される。前記各々の表示部材７の後端部７３が、各々の取付孔６６の透明な周壁を通して外部より視認可能となる。前記各々の取付孔６６に前記表示部材７のみが嵌入され、前記各々の取付孔６６には筆記体５の後端部は挿入されない。前記表示部材の係止部７２の前面がインキ収容管５２の後端に当接され、前記表示部材の係止部７２の後面が操作体６の前端に当接される。 The outer surface of the rod-shaped rear end portion 73 of the display member 7 (identification display portion) of each of the writing bodies 5 is fitted into each of the mounting holes 66. The rear end portions 73 of the display members 7 can be viewed from the outside through the transparent peripheral walls of the mounting holes 66. Only the display member 7 is inserted into each of the mounting holes 66, and the rear end portion of the writing body 5 is not inserted into each of the mounting holes 66. The front surface of the locking portion 72 of the display member is brought into contact with the rear end of the ink containing tube 52, and the rear surface of the locking portion 72 of the display member is brought into contact with the front end of the operation body 6.

前記表示部材７の前端部７１と筆記体５（インキ収容管５２）の後端開口部との固着は、前記表示部材７の後端部７３と操作体６の取付孔６６との間の嵌合よりも、強く固着され、それにより、筆記体５の交換時、操作体６から表示部材７を容易に取り除くことができる。また、前記表示部材７の後端部７３の外面に外向突起（例えば、環状突起または複数個が周状に分散される突起）を設け、前記操作体６の取付孔６６の内面に、前記後端部７３外面の外向突起（例えば、複数個が周状に分散される突起または環状突起）と乗り越え嵌合可能な内向突起を設けてもよい。それにより、表示部材７の前端部７１と操作体６の取付孔６６との容易な着脱が可能となる。 Adherence between the front end 71 of the display member 7 and the rear end opening of the writing body 5 (ink containing tube 52) is a fit between the rear end 73 of the display member 7 and the mounting hole 66 of the operating body 6. The display member 7 can be easily removed from the operating body 6 when the writing body 5 is replaced. Further, an outward projection (for example, an annular projection or a projection in which a plurality of circumferential projections are dispersed) is provided on the outer surface of the rear end portion 73 of the display member 7, and the rear surface of the mounting hole 66 of the operating body 6 is provided with the rear projection. You may provide the inward protrusion which can get over and fit with the outward protrusion (for example, the protrusion or annular protrusion in which a plurality is distributed in the shape of a circumference) of the end 73 outer surface. Thereby, the front end 71 of the display member 7 and the attachment hole 66 of the operation body 6 can be easily attached and detached.

前記各々の操作体６の鍔部６４の前面には、各々の弾発体８の後端が係止される。また、前記各々の操作体６の両方の側面には抜け止め突起６５が形成される。前記抜け止め突起６５は窓孔４１の両方の側壁内面に係合可能である。 The rear ends of the respective elastic bodies 8 are locked to the front surface of the collar portion 64 of each operation body 6. Further, a retaining protrusion 65 is formed on both side surfaces of each operation body 6. The retaining protrusion 65 can be engaged with the inner surfaces of both side walls of the window hole 41.

ペン先没入状態にある筆記体５の後端に連結された操作体６の前側突出部６２は、その操作体６の操作部６１を前方にスライド操作した際、先にペン先突出状態にある他の筆記体５の後端に連結された操作体６の後側突出部６３と当接され、他の筆記体５のペン先突出状態が解除される。 The front projecting portion 62 of the operating body 6 connected to the rear end of the writing body 5 in the pen tip immersing state is in a pen tip protruding state when the operating portion 61 of the operating body 6 is slid forward. The pendant protruding state of the other writing object 5 is released by coming into contact with the rear protrusion 63 of the operating body 6 connected to the rear end of the other writing object 5.

ペン先没入状態における各々の筆記体５の表示部材７の後端は、窓孔４１の前端より前方に位置するか又は窓孔４１の前端と一致する。即ち、ペン先没入状態における各々の筆記体５の表示部材７の後端（具体的には後端部７３の後端）は、窓孔４１から後方に突出せず、窓孔４１を介して視認できない。 The rear end of the display member 7 of each cursive body 5 in the pen tip immersion state is located in front of the front end of the window hole 41 or coincides with the front end of the window hole 41. That is, the rear end (specifically, the rear end of the rear end portion 73) of the display member 7 of each writing body 5 in the pen tip immersion state does not protrude rearward from the window hole 41 and passes through the window hole 41. Cannot be seen.

（筆記体の交換）
本実施の形態の多芯筆記具１において、図２に示すように、筆記体５を交換する際、前軸３と後軸４とを分離し、筆記体５の後端部の表示部材７（識別表示部）を操作体６の取付孔６６から抜き取り、その後、新たな筆記体５の後端部の表示部材７（識別表示部）を操作体６の取付孔６６に嵌入する。 (Replace cursive)
In the multi-core writing instrument 1 of the present embodiment, as shown in FIG. 2, when the writing body 5 is replaced, the front shaft 3 and the rear shaft 4 are separated, and the display member 7 ( The identification display portion) is extracted from the mounting hole 66 of the operating body 6, and then the display member 7 (identification display portion) at the rear end of the new writing body 5 is inserted into the mounting hole 66 of the operating body 6.

（本実施の形態の作用効果）
本実施の形態の多芯筆記具１は、ペン先没入状態における各々の筆記体５の表示部材７の後端が、窓孔４１の前端より前方に位置するか又は窓孔４１の前端と一致してなることにより、表示部材７の長手寸法を比較的短くすることができ、筆記体５の交換時に表示部材７が折り曲がることを防止できる。また、本実施の形態の多芯筆記具１は、表示部材７全体を短寸化でき、表示部材７の材料コストを低減させることができる。さらに、本実施の形態の多芯筆記具１は、前記各々の窓孔４１よりも前方の軸筒２側壁に透視部４３を設け、前記透視部４３を介して、ペン先没入状態の筆記体５後端の表示部材７（識別表示部）を十分に視認できる。 (Operational effect of the present embodiment)
In the multi-core writing instrument 1 of the present embodiment, the rear end of the display member 7 of each writing body 5 in the pen tip immersion state is located in front of the front end of the window hole 41 or coincides with the front end of the window hole 41. Thus, the longitudinal dimension of the display member 7 can be made relatively short, and the display member 7 can be prevented from being bent when the writing body 5 is replaced. Moreover, the multi-core writing instrument 1 of this Embodiment can shorten the whole display member 7, and can reduce the material cost of the display member 7. FIG. Further, the multi-core writing instrument 1 of the present embodiment is provided with a see-through portion 43 on the side wall of the shaft cylinder 2 in front of each of the window holes 41, and the pen-immersed writing material 5 is inserted through the see-through portion 43. The display member 7 (identification display part) at the rear end can be sufficiently visually recognized.

１ 多芯筆記具
２ 軸筒
３ 前軸
４ 後軸
４１ 窓孔
４２ クリップ
４３ 透視部
５ 筆記体
５１ ペン先（ボールペンチップ）
５２ インキ収容管
６ 操作体
６１ 操作部
６２ 前側突出部
６３ 後側突出部
６４ 鍔部
６５ 抜け止め突起
６６ 取付孔
７ 表示部材（識別表示部）
７１ 前端部
７２ 係止部
７３ 後端部 DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 3 Front shaft 4 Rear shaft 41 Window hole 42 Clip 43 Perspective part 5 Writing body 51 Pen point (ball-point pen tip)
52 Ink Containment Tube 6 Operating Body 61 Operating Part 62 Front Projecting Part 63 Rear Projecting Part 64 Gutter Part 65 Retaining Protrusion 66 Mounting Hole 7 Display Member (Identification Display Part)
71 Front end portion 72 Locking portion 73 Rear end portion

Claims (3)

軸筒内に複数の筆記体を前後方向に移動可能に収容し、前記各々の筆記体を弾発体により後方に付勢し、前記各々の筆記体の後端に操作体を連結し、軸筒の側壁に前後方向に延びる複数の窓孔を径方向に貫設し、前記各々の窓孔から径方向外方に前記各々の操作体を突出させ、一つの操作体を窓孔に沿って前方にスライドさせることにより、その一つの操作体に連結された筆記体のペン先を軸筒の前端孔から突出させるとともに、先に突出状態にあった他の筆記体のペン先を軸筒内に没入させる多芯筆記具であって、
各々の操作体の前端部に前方に開口する取付孔を設け、少なくとも各々の取付孔の周壁を透明材料により形成し、各々の筆記体の後端部に各々の筆記体に対応した識別表示部を有する表示部材を取り付け、各々の筆記体の後端部と各々の操作体との連結状態において、前記各々の表示部材が各々の操作体の取付孔に嵌入され、各々の表示部材が各々の取付孔の周壁を介して視認可能に構成され、ペン先没入状態における各々の筆記体の表示部材の後端が、窓孔の前端より前方に位置するか又は窓孔の前端と一致し、前記各々の窓孔よりも前方の軸筒側壁に透視部を設け、前記透視部を介して各々の表示部材を視認可能に構成したことを特徴とする多芯筆記具。 A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, each of the writing bodies is urged rearward by a projectile, and an operating body is connected to a rear end of each of the writing bodies, A plurality of window holes extending in the front-rear direction are provided in the side wall of the cylinder in the radial direction, the respective operation bodies are protruded radially outward from the respective window holes, and one operation body is disposed along the window hole. By sliding forward, the pen tip of the cursive body connected to the one operating body is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that has been in the projecting state first is inserted into the shaft cylinder. A multi-core writing instrument that immerses you in,
A mounting hole that opens forward is provided at the front end of each operating body, at least the peripheral wall of each mounting hole is formed of a transparent material, and an identification display section corresponding to each writing body at the rear end of each writing body In the connected state of the rear end portion of each writing body and each operation body, each display member is inserted into the mounting hole of each operation body, and each display member is each It is configured to be visible through the peripheral wall of the mounting hole, the rear end of the display member of each writing body in the pen tip immersion state is located in front of the front end of the window hole or coincides with the front end of the window hole, A multi-core writing instrument, wherein a see-through portion is provided on a side wall of a shaft cylinder in front of each window hole, and each display member is visible through the see-through portion. 少なくとも窓孔よりも前方の軸筒側壁を透明材料から形成することによって透視部が構成される請求項１記載の多芯筆記具。 The multi-core writing instrument according to claim 1, wherein the see-through portion is formed by forming at least the axial cylinder side wall ahead of the window hole from a transparent material. 窓孔よりも前方の軸筒側壁に径方向に貫通する小孔を形成することによって透視部が構成される請求項１記載の多芯筆記具。 The multi-core writing instrument according to claim 1, wherein the see-through portion is configured by forming a small hole penetrating in a radial direction in a side wall of the shaft cylinder ahead of the window hole.
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