JP3153695U

JP3153695U - Multi-core writing instrument and cursive body used therefor

Info

Publication number: JP3153695U
Application number: JP2009004586U
Authority: JP
Inventors: 安藤　正史; 正史安藤
Original assignee: Pilot Ink Co Ltd
Current assignee: Pilot Ink Co Ltd
Priority date: 2009-07-03
Filing date: 2009-07-03
Publication date: 2009-09-17
Anticipated expiration: 2016-09-21

Abstract

【課題】筆記体の交換時、操作体のボールペンチップ前端のボールの外径を示す表示と対応しない筆記体を誤って操作体に連結をするおそれがない多芯筆記具及び多芯筆記具用筆記体を提供する。【解決手段】軸筒２内に複数の筆記体６を前後方向に移動可能に収容する。各々の筆記体６を弾発体８により後方に付勢する。各々の筆記体６の後端に、各々の筆記体６に対応した操作体７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を径方向に貫設する。各々の窓孔４１から径方向外方に各々の操作体７を突出させる。筆記体６のペン先が前端に回転可能なボールを備えたボールペンチップからなる。操作体７の外面に、ボールペンチップ前端のボールの外径を示す表示部１０を設ける。筆記体６と前記操作体７とを、連結状態で、軸筒２内から取り外し可能且つ軸筒２内に挿入可能に構成する。【選択図】図６A multi-core writing instrument and a writing instrument for a multi-core writing instrument in which there is no risk of erroneously connecting a writing body that does not correspond to the display indicating the outer diameter of the ball at the front end of the ball-point pen tip of the operating body when the writing body is replaced. I will provide a. A plurality of writing bodies are accommodated in a shaft cylinder so as to be movable in the front-rear direction. Each cursive body 6 is biased backward by the projectile 8. An operating body 7 corresponding to each writing body 6 is connected to the rear end of each writing body 6, and a plurality of window holes 41 extending in the front-rear direction are provided through the side wall of the shaft cylinder 2 in the radial direction. Each operation body 7 is protruded radially outward from each window hole 41. The pen point of the writing body 6 is composed of a ballpoint pen tip having a rotatable ball at the front end. A display unit 10 indicating the outer diameter of the ball at the front end of the ballpoint pen tip is provided on the outer surface of the operation body 7. The writing body 6 and the operating body 7 are configured to be removable from the shaft cylinder 2 and insertable into the shaft cylinder 2 in a connected state. [Selection] Figure 6

Description

本考案は、多芯筆記具及びそれに用いる筆記体に関する。詳細には、軸筒内に複数の筆記体を収容した多芯筆記具及びそれに用いる筆記体（多芯筆記具用筆記体）に関する。 The present invention relates to a multi-core writing instrument and a writing body used therefor. Specifically, the present invention relates to a multi-core writing instrument in which a plurality of writing bodies are accommodated in a shaft cylinder, and a writing body (a writing body for a multi-core writing instrument) used therefor.

従来この種の筆記具において、特許文献１には、操作部（本願の操作体に相当）に転写ボールのボール径を示す表示部を施すことが開示されている。
実用新案登録第３０４９６６号公報 Conventionally, in this type of writing instrument, Patent Document 1 discloses that a display unit indicating a ball diameter of a transfer ball is provided on an operation unit (corresponding to an operation body of the present application).
Utility Model Registration No. 304966

前記従来の多芯筆記具において、筆記体を交換する際、操作体を軸筒内に残した状態で筆記体のみを軸筒から取り出し、新たな筆記体に交換する。それにより、前記従来の多芯筆記具は、筆記体の交換時において、筆記体の後端に、ボール外径表示を有する操作体を備えないため、誤って操作体のボール径表示と対応しない筆記体を操作体に連結してしまうおそれがある。 In the conventional multi-core writing instrument, when the writing body is replaced, only the writing body is taken out from the shaft cylinder while the operation body is left in the shaft cylinder, and is replaced with a new writing body. Accordingly, the conventional multi-core writing instrument does not include an operating body having a ball outer diameter display at the rear end of the writing body at the time of replacement of the writing body, and thus writing that does not correspond to the ball diameter display of the operating body by mistake. There is a risk of connecting the body to the operating body.

また、前記従来の多芯筆記具において、ボール外径を示す表示部は、ペン先突出操作前に、ペン先没入状態の複数の筆記体の中から好みの外径を有するペン先のボールを備えた筆記体を選択するためのものである。そのため、ペン先突出状態におけるボール外径表示については考慮されていない。したがって、前記従来の多芯筆記具は、ペン先突出状態において、ボール径の確認が容易でなく、ボール径を確認したい場合、再度、ペン先を没入させて表示部を確認する手間を要した。 Further, in the conventional multi-core writing instrument, the display unit indicating the outer diameter of the ball includes a pen tip ball having a favorite outer diameter among a plurality of pen-immersed writing bodies before the pen tip protruding operation. This is for selecting cursive letters. Therefore, the ball outer diameter display in the pen tip protruding state is not considered. Accordingly, in the conventional multi-core writing instrument, it is not easy to check the ball diameter in the protruding state of the pen tip, and when it is desired to check the ball diameter, it is necessary to immerse the pen tip again and check the display unit.

本考案は、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、操作体のペン先前端の大きさまたはボールペンチップ前端のボールの外径を示す表示と対応しない筆記体を誤って操作体に連結をするおそれがない多芯筆記具及び多芯筆記具用筆記体を提供しようとするものである。また、ペン先突出状態においても、ペン先前端の大きさまたはボールペンチップ前端のボールの外径を容易に確認できる多芯筆記具を提供しようとするものである。尚、本考案において、「前」とはペン先側を指し、「後」とは反対側を指す。 The present invention solves the above-mentioned conventional problems, and when replacing the cursive body, a cursive body that does not correspond to the display indicating the size of the front end of the pen tip of the operating body or the outer diameter of the ball at the front end of the ballpoint pen tip. An object of the present invention is to provide a multi-core writing instrument and a multi-core writing instrument writing body that are not likely to be erroneously connected to an operating body. It is another object of the present invention to provide a multi-core writing instrument capable of easily confirming the size of the front end of the pen tip or the outer diameter of the ball at the front end of the ballpoint pen tip even when the pen tip protrudes. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

［１］本願の第１の考案は、軸筒２内に複数の筆記体６を前後方向に移動可能に収容し、前記各々の筆記体６を弾発体８により後方に付勢し、前記各々の筆記体６の後端に、各々の筆記体６に対応した操作体７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７を突出させ、一つの操作体７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７に連結された筆記体６のペン先６１を軸筒２の前端孔３１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６のペン先６１を軸筒２内に没入させる多芯筆記具であって、前記操作体７の外面に、ペン先６１前端の大きさを示す表示部１０を設け、前記筆記体６と前記操作体７とを、連結状態で、軸筒２内から取り外し可能且つ軸筒２内に挿入可能に構成したことを特徴とする。 [1] In the first device of the present application, a plurality of writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 6 is urged rearward by a projectile body 8, An operating body 7 corresponding to each writing body 6 is connected to the rear end of each writing body 6, and 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, Each of the operating bodies 7 protrudes radially outward from the window hole 41, and one operating body 7 is slid forward along the window hole 41, whereby the writing connected to the one operating body 7 is made. A multi-core writing instrument that causes the nib 61 of the body 6 to protrude from the front end hole 31 of the shaft cylinder 2 and the pen nib 61 of another writing body 6 that has been in the protruding state to be immersed in the shaft cylinder 2, A display unit 10 indicating the size of the front end of the pen tip 61 is provided on the outer surface of the operation body 7, and the writing body 6 and the operation body 7 are connected to each other. In the coupled state, characterized by being insertable configured to removably and in the barrel 2 from inside the barrel 2.

前記第１の考案の多芯筆記具１は、筆記体６の交換時、筆記体６と操作体７とが連結状態にあるため、誤って操作体７のペン先６１前端の大きさの表示と対応しない筆記体６を操作体７に連結をするおそれがない。尚、前記多芯筆記具１（第１の考案）において、表示部１０は、印刷、シール貼付、刻設、凹設、凸設などの手段により設けられる。前記ペン先６１前端の大きさは、例えば、ペン先６１がボールペンチップの場合、ボールペンチップ前端のボールの大きさまたは外径が採用され、ペン先６１がシャープペンシルの場合、鉛芯の太さまたは外径が採用される。前記表示部１０において、ペン先６１前端の大きさを表示するものとして、例えば、ペン先６１前端の外径等の寸法を示す数字、またはペン先６１前端の大小を識別する文字、記号、図形等が挙げられる。 In the multi-core writing instrument 1 according to the first device, since the writing body 6 and the operating body 7 are in a connected state when the writing body 6 is replaced, the display of the size of the front end of the pen tip 61 of the operating body 7 is erroneously displayed. There is no possibility of connecting the non-corresponding writing body 6 to the operation body 7. In the multi-core writing instrument 1 (first device), the display unit 10 is provided by means such as printing, sticking a sticker, engraving, recessing, or protruding. The size of the front end of the pen tip 61 is, for example, the ball size or outer diameter of the ball pen tip front end when the pen tip 61 is a ballpoint pen tip, and the lead core thickness when the pen tip 61 is a mechanical pencil. Or an outer diameter is employ | adopted. The display unit 10 displays the size of the front end of the pen tip 61, for example, a number indicating a dimension such as the outer diameter of the front end of the pen tip 61, or a character, symbol, figure for identifying the size of the front end of the pen tip 61 Etc.

［２］本願の第２の考案は、軸筒２内に複数の筆記体６を前後方向に移動可能に収容し、前記各々の筆記体６を弾発体８により後方に付勢し、前記各々の筆記体６の後端に、各々の筆記体６に対応した操作体７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７を突出させ、一つの操作体７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７に連結された筆記体６のペン先６１を軸筒２の前端孔３１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６のペン先６１を軸筒２内に没入させる多芯筆記具であって、筆記体６のペン先６１が前端に回転可能なボールを備えたボールペンチップからなり、前記操作体７の外面に、ボールペンチップ前端のボールの外径を示す表示部１０を設け、前記筆記体６と前記操作体７とを、連結状態で、軸筒２内から取り外し可能且つ軸筒２内に挿入可能に構成したことを特徴とする。 [2] In the second device of the present application, a plurality of writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 6 is urged rearward by a projectile body 8, An operating body 7 corresponding to each writing body 6 is connected to the rear end of each writing body 6, and 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, Each of the operating bodies 7 protrudes radially outward from the window hole 41, and one operating body 7 is slid forward along the window hole 41, whereby the writing connected to the one operating body 7 is made. A multi-core writing instrument that causes the nib 61 of the body 6 to protrude from the front end hole 31 of the shaft cylinder 2 and the pen nib 61 of another writing body 6 that has been in the protruding state to be immersed in the shaft cylinder 2, The pen point 61 of the writing body 6 is composed of a ball-point pen tip having a ball that can rotate at the front end. The display unit 10 indicating the outer diameter of the ball at the front end of the ball-point pen tip is provided, and the writing body 6 and the operation body 7 are configured to be removable from the shaft cylinder 2 and inserted into the shaft cylinder 2 in a connected state. It is characterized by that.

前記第２の考案の多芯筆記具１は、筆記体６の交換時、筆記体６と操作体７とが連結状態にあるため、誤って操作体７のボールペンチップ前端のボールの外径の表示と対応しない筆記体６を操作体７に連結をするおそれがない。尚、前記多芯筆記具１（第２の考案）において、表示部１０は、印刷、シール貼付、刻設、凹設、凸設などの手段により設けられる。 In the multi-core writing instrument 1 of the second device, since the writing body 6 and the operating body 7 are in a connected state when the writing body 6 is replaced, the outer diameter of the ball at the front end of the ball-point pen tip of the operating body 7 is erroneously displayed. There is no possibility of connecting the writing body 6 that does not correspond to the operating body 7. In the multi-core writing instrument 1 (second device), the display unit 10 is provided by means such as printing, sticking a sticker, engraving, recessing, or protruding.

[３]本願の第３の考案は、前記第１または第２の考案において、ペン先６１が前端孔３１から突出した状態及びペン先６１が軸筒２内に没入した状態において、前記表示部１０が外部より視認可能であることを特徴とする。 [3] The third device of the present application is the display device according to the first or second device, wherein the pen point 61 protrudes from the front end hole 31 and the pen point 61 is immersed in the shaft tube 2. 10 is visible from the outside.

前記第３の考案の多芯筆記具１は、ペン先突出状態及びペン先没入状態のいずれにおいても、ペン先６１前端の大きさ（例えば、ボール外径、鉛芯外径）を容易に確認できる。特に、ペン先突出状態において、ペン先６１前端の大きさを確認したい場合、再度、ペン先６１を没入させて表示部１０を確認する手間を要さず、表示部１０の確認が容易となる。前記第３の考案は、ペン先６１が前端孔３１から突出した状態において、表示部１０が外部より視認可能な構成として、例えば、ペン先突出状態の表示部１０が位置する軸筒２側壁を透明にする構成、またはペン先突出状態の表示部１０が位置する軸筒２側壁に孔を設ける構成が挙げられる。 The multi-core writing instrument 1 of the third device can easily confirm the size of the front end of the nib 61 (for example, the outer diameter of the ball and the outer diameter of the lead nib) in both the nib protruding state and the nib immersing state. . In particular, when it is desired to check the size of the front end of the pen tip 61 in the pen tip protruding state, it is not necessary to immerse the pen tip 61 again to check the display unit 10, and the display unit 10 can be easily checked. . In the third device, in the state where the pen tip 61 protrudes from the front end hole 31, for example, the side wall of the shaft cylinder 2 where the display unit 10 in the pen tip protruding state is located is configured so that the display unit 10 can be visually recognized from the outside. The structure which makes it transparent, or the structure which provides a hole in the axial cylinder 2 side wall in which the display part 10 of a pen tip protrusion state is located is mentioned.

[４]本願の第４の考案は、前記第１または第２の考案において、ペン先６１が前端孔３１から突出した状態及びペン先６１が軸筒２内に没入した状態において、前記窓孔４１を通して、前記表示部１０が外部より視認可能であることを特徴とする。 [4] The fourth invention of the present application is that, in the first or second invention, in the state where the pen tip 61 protrudes from the front end hole 31 and the pen tip 61 is immersed in the shaft tube 2, the window hole 41, the display unit 10 is visible from the outside.

前記第４の考案の多芯筆記具１は、ペン先突出状態及びペン先没入状態のいずれにおいても、ペン先６１前端の大きさ（例えば、ボール外径、鉛芯外径）を確実に視認できる。特に、ペン先突出状態において、ペン先６１前端の大きさを確認したい場合、再度、ペン先６１を没入させて表示部１０を確認する手間を要さず、ペン先６１前端の大きさの視認が容易となる。 The multi-core writing instrument 1 of the fourth device can surely visually recognize the size of the front end of the nib 61 (for example, the outer diameter of the ball and the outer diameter of the lead nib) in both the nib protruding state and the nib immersing state. . In particular, when it is desired to check the size of the front end of the pen tip 61 in the protruding state of the pen tip, it is not necessary to immerse the pen tip 61 again to check the display unit 10 and to confirm the size of the front end of the pen tip 61. Becomes easy.

[５]本願の第５の考案は、前記第１、第２、第３または第４の考案において、前記操作体７を合成樹脂の成形体により構成するとともに表示部１０を操作体７の外面に一体に形成し、前記表示部１０がペン先６１前端の大きさまたはボールペンチップ前端のボールの外径を示す表示１１を備え、前記表示１１を凹設または凸設により形成してなることを特徴とする。 [5] The fifth invention of the present application is that, in the first, second, third, or fourth invention, the operation body 7 is formed of a synthetic resin molded body and the display unit 10 is an outer surface of the operation body 7. The display unit 10 is provided with a display 11 indicating the size of the front end of the pen tip 61 or the outer diameter of the ball at the front end of the ball-point pen tip, and the display 11 is formed by recessing or projecting. Features.

前記第５の考案の多芯筆記具１は、操作体７の外面に明確な表示１１を形成でき、表示１１の識別が容易となる。尚、前記表示１１は、ペン先６１前端の大きさまたはボールペンチップ前端のボールの外径を示すものであれば、いずれであってもよく、例えば、数字、文字、図形、記号等が挙げられる。 The multi-core writing instrument 1 according to the fifth aspect can form a clear display 11 on the outer surface of the operating body 7, and the display 11 can be easily identified. The display 11 may be any display as long as it indicates the size of the front end of the pen tip 61 or the outer diameter of the ball at the front end of the ballpoint pen tip, and examples thereof include numbers, letters, figures, symbols, and the like. .

［６］本願の第６の考案は、前記第１、第２、第３、第４または第５の考案において、前記表示部１０が、ペン先６１前端の大きさまたはボールペンチップ前端のボールの外径を示す表示１１と、該表示１１の周囲の背景１２とからなり、前記表示１１と背景１２のいずれか一方を平滑面（光沢面）にし、他方を粗面（シボ面または梨地面）にしたことを特徴とする。 [6] The sixth invention of the present application is that, in the first, second, third, fourth, or fifth invention, the display unit 10 is configured such that the size of the front end of the pen tip 61 or the ball at the front end of the ball-point pen tip. It consists of a display 11 indicating the outer diameter and a background 12 around the display 11, and either the display 11 or the background 12 is a smooth surface (glossy surface) and the other is a rough surface (texture surface or pear surface). It is characterized by that.

前記第６の考案の多芯筆記具１は、表示１１と背景１２とのコントラストが明確となり、一層、表示１１の識別が容易となる。 In the multi-core writing instrument 1 of the sixth invention, the contrast between the display 11 and the background 12 becomes clear, and the display 11 can be further easily identified.

［７］本願の第７の考案は、前記第６の考案において、前記背景１２が、表示１１を包囲する枠状の周縁部１３を備えることを特徴とする。 [7] The seventh invention of the present application is characterized in that, in the sixth invention, the background 12 includes a frame-shaped peripheral portion 13 surrounding the display 11.

前記第７の考案の多芯筆記具１は、操作体７の外面において表示部１０が際立ち、一層、表示部１０の視認が容易となる。 In the multi-core writing instrument 1 according to the seventh aspect, the display unit 10 stands out on the outer surface of the operation body 7, and the display unit 10 can be more easily viewed.

［８］本願の第８の考案は、使用時に軸筒２内に複数本が収容され、各々の後端に連結した操作体７を軸筒２の側壁より突出させ、前記操作体７を前方にスライド操作することにより軸筒２の前端からペン先６１を出没させる多芯筆記具用筆記体であって、軸筒２内に収容される前の状態において、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と、該ボールペンチップが前端に固着され且つ内部にインキが収容されたインキ収容管６２と、該インキ収容管６２の後端に連結され且つインキ収容管６２内のインキの色に着色された操作体７とからなり、前記操作体７の外面に、前記ボールペンチップ前端のボールの外径を示す表示部１０を設けたことを特徴とする。 [8] In the eighth device of the present application, when used, a plurality of shafts 2 are accommodated in the shaft cylinder 2, and the operating bodies 7 connected to the rear ends of each are projected from the side walls of the shaft cylinder 2, and the operating bodies 7 are moved forward. This is a writing body for a multi-core writing instrument that causes the pen tip 61 to be projected and retracted from the front end of the shaft cylinder 2 by being slid to the front, and the ball is rotatably held at the front end before being housed in the shaft cylinder 2. A ballpoint pen tip, an ink containing tube 62 in which the ballpoint pen tip is fixed to the front end and containing ink, and a color of ink in the ink containing tube 62 connected to the rear end of the ink containing tube 62 The display unit 10 includes a colored operation body 7, and a display unit 10 indicating an outer diameter of a ball at the front end of the ballpoint pen tip is provided on the outer surface of the operation body 7.

前記第８の考案の多芯筆記具用筆記体６は、筆記体６の交換時、筆記体６と操作体７とが連結状態にあるため、誤って操作体７のボールペンチップ前端のボールの外径の表示１１と対応しない筆記体６を操作体７に連結をするおそれがない。 Since the writing body 6 and the operating body 7 are in a connected state when the writing body 6 is replaced, the writing body 6 for the multi-core writing instrument according to the eighth aspect of the invention is mistakenly placed outside the ball at the front end of the ballpoint pen tip of the operating body 7. There is no fear that the writing body 6 that does not correspond to the diameter display 11 is connected to the operation body 7.

尚、本考案で、軸筒２内に収容する筆記体６の本数は、２本以上であればよく、具体的には、２本、３本、４本、５本、６本等が挙げられる。尚、本考案で、筆記体６と操作体７とを連結状態にするために、筆記体６と操作体７とを一体に形成すること（即ち一部材により構成すること）も可能である。 In the present invention, the number of the writing bodies 6 accommodated in the shaft cylinder 2 may be two or more, specifically, 2, 3, 4, 5, 6, etc. It is done. In the present invention, in order to connect the writing body 6 and the operation body 7 to each other, the writing body 6 and the operation body 7 can be integrally formed (that is, constituted by a single member).

請求項１の多芯筆記具によれば、筆記体の交換時、誤って操作体のペン先前端の大きさの表示と対応しない筆記体を操作体に連結をするおそれがない。 According to the multi-core writing instrument of claim 1, there is no fear that the writing body that does not correspond to the display of the size of the front end of the pen tip of the operating body is mistakenly connected to the operating body when the writing body is replaced.

請求項２の多芯筆記具によれば、筆記体の交換時、誤って操作体のボール外径の表示と対応しない筆記体を操作体に連結をするおそれがない。 According to the multi-core writing instrument of claim 2, there is no risk of erroneously connecting a writing body that does not correspond to the display of the ball outer diameter of the operating body to the operating body when replacing the writing body.

請求項３の多芯筆記具によれば、ペン先突出状態においても、ボール外径を容易に確認できる。 According to the multi-core writing instrument of claim 3, the outer diameter of the ball can be easily confirmed even in the pen tip protruding state.

請求項４の多芯筆記具によれば、ペン先突出状態においても、ボール外径を確実に視認できる。 According to the multi-core writing instrument of claim 4, the outer diameter of the ball can be reliably recognized even in the pen tip protruding state.

請求項５の多芯筆記具によれば、表示の識別が容易となる。 According to the multi-core writing instrument of claim 5, the display can be easily identified.

請求項６の多芯筆記具によれば、表示の識別が容易となる。 According to the multi-core writing instrument of claim 6, the display can be easily identified.

請求項７の多芯筆記具によれば、表示部の視認が容易となる。 According to the multi-core writing instrument of claim 7, it is easy to visually recognize the display unit.

請求項８の多芯筆記具によれば、筆記体の交換時、誤って操作体のボール外径の表示と対応しない筆記体を操作体に連結をするおそれがない。 According to the multi-core writing instrument of claim 8, there is no risk of erroneously connecting a writing body that does not correspond to the display of the ball outer diameter of the operating body to the operating body when replacing the writing body.

［第1の実施の形態］
図１乃至図１３に本考案の多芯筆記具１及びそれに用いる筆記体６（多芯筆記具用筆記体）の第１の実施の形態を示す。本実施の形態の多芯筆記具１は、軸筒２内に複数本（具体的には２本）の筆記体６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６は、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。 [First embodiment]
1 to 13 show a first embodiment of a multi-core writing instrument 1 of the present invention and a writing body 6 (writing body for a multi-core writing instrument) used therefor. In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, two) of writing bodies 6 are accommodated in a shaft tube 2 so as to be movable in the front-rear direction. Each of the writing bodies 6 is urged rearward by an elastic body 8 (specifically, a compression coil spring).

（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圧入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、筆記体６のペン先６１が突出可能な前端孔３１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。 (Shaft tube)
The shaft cylinder 2 includes a front shaft 3 formed 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 press-fitting. At the front end of the front shaft 3, a front end hole 31 through which the pen tip 61 of the writing body 6 can protrude 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).

前記後軸４の後部の側壁には、複数本（具体的には２本）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２本の窓孔４１は、互いに、軸線に対して対称の位置に形成される。また、前記後軸４の後端部には、軸方向に貫通し且つ径方向外方に開口する開口部４２が形成される。前記開口部４２は、後軸４の後端（即ち軸筒２の後端）において窓孔４１と連通され、それにより、窓孔４１後端が後方に切り欠かれ後方に開口されている。一方、前記窓孔４１の前端は常時閉鎖されている。 A plurality (specifically, two) elongated window holes 41 extending in the front-rear direction are provided in a radial direction in the rear side wall of the rear shaft 4. The two window holes 41 are formed at positions symmetrical with respect to the axis. An opening 42 is formed at the rear end portion of the rear shaft 4 so as to penetrate in the axial direction and open radially outward. The opening 42 communicates with the window hole 41 at the rear end of the rear shaft 4 (that is, the rear end of the shaft cylinder 2), whereby the rear end of the window hole 41 is notched rearward and opened rearward. On the other hand, the front end of the window hole 41 is always closed.

前記開口部４２の両側の内壁には、操作体７の挿入時、操作体７の側面と摺動し、操作体７の側面の向きを規制するガイド部４２１が形成される。さらに、前記ガイド部４２１には、操作体７の抜け止め突起７６が挿入可能な凹部４２１ａが形成される。前記ガイド部４２１は、操作体７の操作部７１が径方向外方に向いた状態でのみ、挿入可能な形状に設定される。 On the inner walls on both sides of the opening 42, guide portions 421 are formed that slide with the side surfaces of the operating body 7 when the operating body 7 is inserted and regulate the orientation of the side surfaces of the operating body 7. Further, the guide portion 421 is formed with a concave portion 421a into which the retaining projection 76 of the operating body 7 can be inserted. The guide portion 421 is set to a shape that can be inserted only when the operation portion 71 of the operation body 7 faces radially outward.

また、前記後軸４の窓孔４１の相互間の側壁内面には、前後方向に延びるリブよりなる係止壁部４３が形成され、前記係止壁部４３に、ペン先６１が突出した際の筆記体６の操作体７の後端が係止される。 Further, a locking wall portion 43 made of a rib extending in the front-rear direction is formed on the inner surface of the side wall between the window holes 41 of the rear shaft 4, and the pen tip 61 protrudes from the locking wall portion 43. The rear end of the operating body 7 of the cursive body 6 is locked.

前記後軸４の窓孔４１の相互間の側壁外面には、クリップ４４が設けられる。 A clip 44 is provided on the outer surface of the side wall between the window holes 41 of the rear shaft 4.

（蓋部）
前記後軸４の後端部には、前記開口部４２を開閉自在にする蓋部５が回動自在に設けられる。前記蓋部５の一端部は、クリップ４４基部に、ヒンジ部５２により回動自在に接続される。前記ヒンジ部５２は、ペン先下向きでクリップ４４を正面視したときのクリップ４４の左右方向に延設され、それにより、前記蓋部５は、略前後方向に回動自在となる。前記蓋部５の前面には、当接壁部５１が形成される。前記当接壁部５１に、没入状態の筆記体６の後端に連結された各々の操作体７の後端が、当接される。本実施の形態では、前記ヒンジ部５２は、具体的には、回動軸により回動自在に接続される構成が採用されているが、これ以外にも、屈曲変形可能な可撓性を有する連結部または薄肉部により一体に接続される構成であってもよい。 (Cover)
At the rear end portion of the rear shaft 4, a lid portion 5 that can open and close the opening portion 42 is provided rotatably. One end of the lid 5 is pivotally connected to the base of the clip 44 by a hinge 52. The hinge portion 52 extends in the left-right direction of the clip 44 when the clip 44 is viewed from the front with the pen tip facing downward, whereby the lid portion 5 is rotatable in a substantially front-rear direction. A contact wall 51 is formed on the front surface of the lid 5. The rear end of each operation body 7 connected to the rear end of the immersed writing body 6 is brought into contact with the contact wall portion 51. In the present embodiment, specifically, the hinge portion 52 is configured to be pivotably connected by a pivot shaft. However, in addition to this, the hinge portion 52 has flexibility capable of bending deformation. The structure connected integrally by a connection part or a thin part may be sufficient.

前記蓋部５の他端部の前面には、係合部５３が設けられる（具体的には係合凹部または係合孔部が形成される）。後軸４の後端には、前記係合部５３と係合可能な被係合部４５が設けられる（具体的には係合凸部が突設される）。前記係合部５３（係合凹部または係合孔部）の内面（具体的には径方向内面）には、内向突起が形成され、一方、前記被係合部４５（係合凸部）の外面（具体的には径方向外面）には、前記内向突起と乗り越え係止可能な外向突起が形成される。 An engagement portion 53 is provided on the front surface of the other end portion of the lid portion 5 (specifically, an engagement recess or an engagement hole portion is formed). An engaged portion 45 that can be engaged with the engaging portion 53 is provided at the rear end of the rear shaft 4 (specifically, an engaging convex portion protrudes). An inward projection is formed on the inner surface (specifically, the radially inner surface) of the engagement portion 53 (engagement recess or engagement hole), while the engagement portion 45 (engagement convex portion). On the outer surface (specifically, the outer surface in the radial direction), an outward protrusion is formed that can cross over and engage with the inward protrusion.

前記係合部５３と前記被係合部４５とは、蓋部５が開口部４２を閉鎖した際、互いに係合状態にあり（具体的には内向突起と外向突起が乗り越え係止状態にあり）、弾発体８の後方への付勢による操作体７と蓋部５前面の当接壁部５１との当接では、その係合状態は解除されず、蓋部５が開くことはない。 The engaging portion 53 and the engaged portion 45 are in an engaged state with each other when the lid portion 5 closes the opening 42 (specifically, the inward projection and the outward projection are overcoming and locked) ) When the operating body 7 and the contact wall portion 51 on the front surface of the lid portion 5 are brought into contact with each other by the rearward urging of the projectile body 8, the engaged state is not released and the lid portion 5 is not opened. .

また、前記係合部５３と被係合部４５の構成以外にも、前記係合部５３が係合凸部よりなり、前記被係合部４５が係合凹部または係合孔部からなる構成でもよい。前記係合部５３と被係合部４５の構成は、一方が凸部であり且つ他方が凹部または孔部である構成により、後方に開口された窓孔４１により複数に分割された軸筒２後端部（後軸４後端部）が、径方向及び周方向に変形することが抑えられ、筆記使用時（開口部４２の閉鎖時）、窓孔４１の形状を適正に維持できる。 In addition to the configuration of the engaging portion 53 and the engaged portion 45, the engaging portion 53 is an engaging convex portion, and the engaged portion 45 is an engaging concave portion or an engaging hole portion. But you can. The configuration of the engaging portion 53 and the engaged portion 45 is such that one is a convex portion and the other is a concave portion or a hole portion, so that the shaft cylinder 2 is divided into a plurality by a window hole 41 opened rearward. The rear end portion (rear end portion of the rear shaft 4) is prevented from being deformed in the radial direction and the circumferential direction, and the shape of the window hole 41 can be properly maintained when writing is used (when the opening 42 is closed).

（筆記体）
前記各々の筆記体６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６１）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６２とからなる。前記インキ収容管６２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６２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。 (Cursive)
Each of the writing bodies 6 is a ball-point pen refill, and includes a ball-point pen tip (that is, a pen tip 61) in which a ball is rotatably held at the front end, and an ink container provided with the ball-point pen tip at the front end and opened at the rear end. A tube 62. Inside the ink storage tube 62 is accommodated an ink composed of a water-based gel ink having shear thinning viscosity, a low-viscosity aqueous ink, a low-viscosity oil-based ink, or a high-viscosity oil-based ink. 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 advances as the ink is consumed is disposed at the rear end of the ink in the ink containing tube 62. 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６２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６２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６２の前端開口部に固着される。 When the water-based gel ink, the low-viscosity water-based ink, or the low-viscosity oil-based ink is stored in the ink storage tube 62, the ballpoint pen tip attached to the front end of the ballpoint pen tip 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. The ballpoint pen tip may be directly attached to the front end opening of the ink containing tube 62 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 62 via the pen tip holder.

（操作体）
前記各々の筆記体６の後端（即ちインキ収容管６２の後端開口部）には、操作体７が取り付けられる。前記各々の操作体７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７１と、該操作部７１の反対側に設けられる後側突出部７３と、該操作部７１の反対側の後側突出部７３の前方に設けられる前側突出部７２と、前端部に形成され且つインキ収容管６２の後端開口部に嵌入される嵌入部７４と、該嵌入部７４の後方に形成される鍔部７５とを備える。前記嵌入部７４は、インキ収容管６２の後端開口部に嵌入された際、インキ収容管６２の後端開口部を完全には塞がず、インキ収容管６２の内部と外部とを通気可能にする。また、前記鍔部７５の前面には、弾発体８の後端が係止される。また、前記操作体７の両方の側面には抜け止め突起７６が形成される。前記抜け止め突起７６は窓孔４１の両方の側壁内面に係合可能である。 (Operation body)
An operation body 7 is attached to the rear end of each of the writing bodies 6 (that is, the rear end opening of the ink containing tube 62). Each of the operating bodies 7 includes an operating portion 71 formed at the rear end portion and projecting outside from the window hole 41 of the shaft cylinder 2, a rear projecting portion 73 provided on the opposite side of the operating portion 71, A front projecting portion 72 provided in front of the rear projecting portion 73 on the opposite side of the operation portion 71; a fitting portion 74 formed at the front end portion and fitted into the rear end opening of the ink containing tube 62; and the fitting portion. 74, and a collar portion 75 formed at the rear of 74. The insertion portion 74 does not completely block the rear end opening of the ink storage tube 62 when inserted into the rear end opening of the ink storage tube 62, and can vent the inside and the outside of the ink storage tube 62. To. In addition, the rear end of the bullet 8 is locked to the front surface of the flange 75. Further, a retaining projection 76 is formed on both side surfaces of the operating body 7. The retaining protrusion 76 can be engaged with the inner surfaces of both side walls of the window hole 41.

筆記体６のペン先６１が没入状態のとき、その筆記体６に取り付けられた操作体７の後端部は、蓋部５の前面に形成された当接壁部５１に当接される。一方、筆記体６のペン先６１が突出状態のとき、その筆記体６に取り付けられた操作体７の後端部は、軸筒２の内壁に形成された係止壁部４３に係止される。 When the pen point 61 of the writing body 6 is in an immersed state, the rear end portion of the operating body 7 attached to the writing body 6 is brought into contact with a contact wall portion 51 formed on the front surface of the lid portion 5. On the other hand, when the pen point 61 of the writing body 6 is in a protruding state, the rear end portion of the operating body 7 attached to the writing body 6 is locked to a locking wall portion 43 formed on the inner wall of the shaft cylinder 2. The

ペン先没入状態にある筆記体６の後端に連結された操作体７の前側突出部７２は、その操作体７の操作部７１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６の後端に連結された操作体７の後側突出部７３と当接され、他の筆記体６のペン先突出状態が解除される。 The front projecting portion 72 of the operating body 7 connected to the rear end of the writing body 6 in the pen tip immersing state is in a pen tip protruding state when the operating portion 71 of the operating body 7 is slid forward. The pendant protruding state of the other writing body 6 is released by coming into contact with the rear protrusion 73 of the operating body 7 connected to the rear end of the other writing body 6.

前記各々の操作体７は、連結される筆記体６の内部（即ちインキ収容管６２内部）に収容されたインキの色と略同じ色に着色される。具体的には、前記操作体７の各々は、連結される筆記体６のインキ色と略同じ色に着色された合成樹脂の成形体からなる。それにより、前記操作体７は、インキ色表示からなる識別表示を有する。例えば、インキ色が黒色の筆記体６に連結する操作体７は黒色に着色され、インキ色が青色の筆記体６に連結する操作体７は青色に着色され、インキ色が赤色の筆記体６に連結する操作体７は赤色に着色され、インキ色が緑色の筆記体６に連結する操作体７は緑色に着色される。本実施の形態では、インキ色の互いに異なる２本の筆記体６を軸筒２内に収容している。 Each of the operation bodies 7 is colored in substantially the same color as the color of the ink stored in the connected writing body 6 (that is, in the ink storage tube 62). Specifically, each of the operation bodies 7 is formed of a synthetic resin molded body colored in substantially the same color as the ink color of the connected writing body 6. Thereby, the said operation body 7 has the identification display which consists of an ink color display. For example, the operating body 7 connected to the black writing body 6 with the ink color is colored black, the operating body 7 connected to the writing body 6 with the blue ink color is colored blue, and the writing body 6 with the red ink color. The operating body 7 connected to is colored red, and the operating body 7 connected to the writing body 6 whose ink color is green is colored green. In the present embodiment, two writing bodies 6 having different ink colors are accommodated in the shaft cylinder 2.

特に、インキ収容管６２が不透明材料からなる構成の場合、またはインキ収容管６２が透明材料からなるとともに内部のインキが染料インキである構成の場合、内部のインキ色を外部より視認することが困難であるが、操作体７をインキの色と略同じ色に着色したことが有効に作用し、軸筒２外部に存在する交換前の筆記体６において、内部のインキ色を外部より容易に識別できる。 In particular, when the ink storage tube 62 is made of an opaque material, or when the ink storage tube 62 is made of a transparent material and the internal ink is dye ink, it is difficult to visually recognize the internal ink color from the outside. However, it is effective that the operation body 7 is colored in substantially the same color as the color of the ink, and the ink color inside the handwritten body 6 before the replacement that exists outside the shaft cylinder 2 can be easily identified from the outside. it can.

（表示部）
前記各々の操作体７の外面には、ボールペンチップ前端のボールの外径寸法（直径）を表す表示部１０が一体成形により形成される。前記表示部１０は、操作部７１側（即ち前側突出部７２及び後側突出部７３の反対側）の外面に形成される。本実施の形態では、前記表示部１０は、鍔部７５後方且つ操作部７１前方の位置（即ち鍔部７５と操作部７１との間）の操作部７１側の外面に形成されている。これ以外にも、前記表示部１０は、操作部７１の側面に形成してもよい。 (Display section)
On the outer surface of each of the operation bodies 7, a display unit 10 representing the outer diameter (diameter) of the ball at the front end of the ballpoint pen tip is formed by integral molding. The display unit 10 is formed on the outer surface on the operation unit 71 side (that is, on the opposite side of the front protrusion 72 and the rear protrusion 73). In the present embodiment, the display unit 10 is formed on the outer surface on the operation unit 71 side at a position behind the collar unit 75 and in front of the operation unit 71 (that is, between the collar unit 75 and the operation unit 71). In addition, the display unit 10 may be formed on the side surface of the operation unit 71.

前記表示部１０は、表示１１と、該表示１１の周囲の背景１２とからなる（図１３参照）。
前記表示１１は、ボールペンチップ前端のボールの外径の表示するものであり、例えば、ボールの外径が０．３ｍｍ、０．４ｍｍ、０．５ｍｍ等の場合、その表示１１は、「０．３」「０．４」「０．５」からなる数字が採用される。本実施の形態では、前記表示１１は、前方から後方に向かって軸方向に読むように配設されている。これ以外にも、前記表示１１は、後方から前方に向かって軸方向に読むように配設されてもよいし、左右方向（周方向）に読むように配設されてもよい。前記表示１１に採用される数字は、例えば、アラビア数字、ローマ数字、漢数字等が挙げられる。また、前記表示１１に採用される数字は、例えば、単位を省略したものの他、小数点以下を省略したものでもよい。 The display unit 10 includes a display 11 and a background 12 around the display 11 (see FIG. 13).
The display 11 displays the outer diameter of the ball at the front end of the ball-point pen tip. For example, when the outer diameter of the ball is 0.3 mm, 0.4 mm, 0.5 mm, the display 11 indicates “0. Numbers consisting of “3”, “0.4” and “0.5” are adopted. In the present embodiment, the display 11 is arranged to read in the axial direction from the front to the rear. In addition, the display 11 may be arranged to read in the axial direction from the rear to the front, or may be arranged to read in the left-right direction (circumferential direction). Examples of the numbers adopted for the display 11 include Arabic numerals, Roman numerals, and Chinese numerals. In addition, for example, the numbers adopted for the display 11 may be omitted from the decimal point in addition to the unit omitted.

本実施の形態では、前記背景１２は、操作体７の外面に凹設される。即ち、前記背景１２は、操作体７の外面から内方に凹んだ形状に形成される。一方、前記表示１１は、前記背景１２に凸設される。即ち、前記表示１１は、背景１２から外方に突出した形状に形成される。また、前記背景１２は、表示１１を包囲する枠状の周縁部１３を備える。前記背景１２の底面は、平滑面（光沢面）となっている。前記表示１１の頂部は、粗面（シボ面または梨地面）となっている。操作体７の操作部７１側の外面は、平滑面となっている。 In the present embodiment, the background 12 is recessed on the outer surface of the operating body 7. That is, the background 12 is formed in a shape recessed inward from the outer surface of the operating body 7. On the other hand, the display 11 is projected on the background 12. That is, the display 11 is formed in a shape protruding outward from the background 12. The background 12 includes a frame-shaped peripheral portion 13 that surrounds the display 11. The bottom surface of the background 12 is a smooth surface (glossy surface). The top of the display 11 is a rough surface (texture surface or pear surface). The outer surface of the operation body 7 on the operation unit 71 side is a smooth surface.

前記背景１２の底面は平面よりなる。一方、前記操作体７の操作部７１側の外面は、前記背景１２を除く箇所が、凸曲面よりなる。それにより、平滑面よりなる背景１２と、凸曲面よりなる操作体７の操作部７１側の外面との光の反射が異なり、背景１２と、操作体７の操作部７１側の外面とのコントラストを明確にでき、表示部１０の視認が容易となる。即ち、背景１２と操作体７の操作部７１側の外面との表面状態を異なるものにしたことにより、背景１２と、操作体７の操作部７１側の外面とのコントラストを明確にでき、表示部１０の視認が容易となる。 The bottom surface of the background 12 is a flat surface. On the other hand, on the outer surface of the operation body 7 on the operation unit 71 side, the portion excluding the background 12 is a convex curved surface. Thereby, the reflection of light is different between the background 12 made of a smooth surface and the outer surface of the operation body 7 made of a convex curved surface on the operation portion 71 side, and the contrast between the background 12 and the outer surface of the operation body 7 on the operation portion 71 side is different. And the visual recognition of the display unit 10 becomes easy. That is, by making the surface state of the background 12 different from the outer surface of the operating body 7 on the operating portion 71 side, the contrast between the background 12 and the outer surface of the operating body 7 on the operating portion 71 side can be clarified and displayed. The visual recognition of the part 10 becomes easy.

（弾発体支持部）
軸筒２の内壁（即ち後軸４の内壁）には、円筒状の弾発体支持部９が設けられる。前記弾発体支持部９は、筆記体６が挿通される複数（具体的には２個）の内孔９１が軸方向に貫設されている。前記弾発体支持部９の後面と、各々の操作体７の鍔部７５の前面との間には、弾発体８が配置される。前記各々の弾発体８の内部に筆記体６が遊挿されるとともに、各々の弾発体８の前端は弾発体支持部９の後面により係止され、各々の弾発体８の後端は操作体７の鍔部７５の前面に係止される。 (Projection support part)
A cylindrical projectile support part 9 is provided on the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear shaft 4). The projectile support 9 has a plurality of (specifically, two) inner holes 91 through which the writing body 6 is inserted, extending in the axial direction. A projectile 8 is disposed between the rear surface of the projectile support 9 and the front surface of the collar 75 of each operation body 7. While the cursive body 6 is loosely inserted into each of the bullet bodies 8, the front end of each bullet body 8 is locked by the rear surface of the bullet body support portion 9, and the rear end of each bullet body 8. Is locked to the front surface of the collar portion 75 of the operating body 7.

また、弾発体支持部９の後面の各々の内孔９１の周囲には、後方に突出する筒状突出部よりなる保持部９２が形成される。前記各々の保持部９２の内面は、各々の弾発体８の前端部外面が圧入保持される。それにより、各々の筆記体６及び操作体７を交換する際、軸筒２内から開口部４２を通して各々の弾発体８が脱落することを防止できる。 Further, around each inner hole 91 on the rear surface of the projectile support 9, a holding portion 92 made of a cylindrical protruding portion protruding rearward is formed. The inner surface of each holding portion 92 is press-fitted and held at the outer surface of the front end portion of each bullet member 8. Thereby, when each writing body 6 and the operation body 7 are exchanged, it is possible to prevent each of the projectile bodies 8 from dropping out of the shaft tube 2 through the opening 42.

前記各々の弾発体８は、各々の操作体７（即ち各々の筆記体６）を、常時、後方に付勢している。前記各々の弾発体８は、ペン先突出状態及びペン先没入状態のいずれにおいても圧縮状態（即ち筆記体６が後方に付勢された状態）にあり、それにより、各々の操作体７の前後のがたつきが防止される。 Each of the projectile bodies 8 always urges each operation body 7 (that is, each writing body 6) backward. Each of the elastic bodies 8 is in a compressed state (that is, a state in which the writing body 6 is urged rearward) in both the pen tip protruding state and the pen tip immersing state. Shaking back and forth is prevented.

図９乃至図１２に軸筒２内に収容する前の状態の多芯筆記具用筆記体６を示す。
前記筆記体６のペン先６１（ボールペンチップ）の前端には、ペン先乾燥防止用の被覆樹脂６１ａが固着される。前記被覆樹脂６１ａは、筆記使用開始時にはユーザーによって取り除かれる。 FIG. 9 to FIG. 12 show the writing body 6 for a multi-core writing instrument in a state before being housed in the shaft tube 2.
A coating resin 61a for preventing the drying of the nib is fixed to the front end of the nib 61 (ballpoint pen tip) of the writing body 6. The coating resin 61a is removed by the user when writing is started.

（包装袋）
図１１及び図１２に、前記多芯筆記具用筆記体６を包装袋１４に収容した状態を示す。筆記体６は、透明材料（透明プラスチックフィルム）よりなる長方形形状の包装袋１４の内部に収容される。前記一つの包装袋１４に対して、1本の多芯筆記具用筆記体６が収容され、それにより、ユーザーが好みのインキ色及びボール外径を備えた筆記体６を自由に組合せて多芯筆記具として使用できる。 (Packaging bag)
FIG. 11 and FIG. 12 show a state in which the writing body 6 for a multi-core writing instrument is accommodated in a packaging bag 14. The cursive body 6 is accommodated in a rectangular packaging bag 14 made of a transparent material (transparent plastic film). One multi-core writing instrument 6 is accommodated in the one packaging bag 14, and the user can freely combine the writing bodies 6 having the ink color and the ball outer diameter as desired. Can be used as a writing instrument.

前記包装袋１４は、一端に吊下孔１４ａが形成される。前記吊下孔１４ａの周囲の包装袋１４表面（即ち吊下孔１４ａを備えたヘッダー部）には、内部に収容した多芯筆記具用筆記体６のインキ色に着色された着色部１４ｂが印刷により設けられる。 The packaging bag 14 has a suspension hole 14a at one end. On the surface of the packaging bag 14 around the suspension hole 14a (that is, the header portion provided with the suspension hole 14a), a colored portion 14b colored in the ink color of the multi-core writing instrument 6 contained therein is printed. Is provided.

図１１に示すように、前記多芯筆記具用筆記体６を包装袋１４内に収容した状態において、操作体７は吊下孔１４ａ側に位置され、一方、ボールペンチップはその吊下孔１４ａ側と反対側に位置される。そのため、包装袋１４を吊り下げ状態にすると、ボールペンチップ側が下向きになり、上側に操作体７が位置することになる。 As shown in FIG. 11, in a state where the writing body 6 for a multi-core writing instrument is accommodated in a packaging bag 14, the operating body 7 is positioned on the hanging hole 14a side, while the ball-point pen tip is on the hanging hole 14a side. Located on the opposite side. For this reason, when the packaging bag 14 is suspended, the ball-point pen tip side is directed downward, and the operating body 7 is positioned on the upper side.

図１２に示すように、前記多芯筆記具用筆記体６を包装袋１４内に収容した状態において、ボールペンチップは吊下孔１４ａ側に位置され、一方、操作体７はその吊下孔１４ａ側と反対側に位置される。そのため、包装袋１４を吊り下げ状態にすると、ボールペンチップ側が上向きになり、下側に操作体７が位置することになる。その結果、ボールペンチップ２の前端からインキが漏出するおそれがない。また、図１２の場合、包装袋１４の吊下孔１４ａと反対側の端部がボールペンチップの前端によって損傷するおそれがない。また、図１２の場合、包装袋１４の吊下孔１４ａと反対側の端部に開閉口を設けることにより、包装袋１４に開閉口を通して筆記体６を出し入れする際、操作体７から容易に出し入れでき、ボールペンチップ前端の損傷を防ぐことができる。 As shown in FIG. 12, in the state where the writing body 6 for a multi-core writing instrument is accommodated in a packaging bag 14, the ball-point pen tip is positioned on the hanging hole 14a side, while the operating body 7 is on the hanging hole 14a side. Located on the opposite side. Therefore, when the packaging bag 14 is suspended, the ball-point pen tip side faces upward, and the operating body 7 is positioned on the lower side. As a result, there is no risk of ink leaking from the front end of the ballpoint pen tip 2. In the case of FIG. 12, the end of the packaging bag 14 opposite to the suspension hole 14a is not likely to be damaged by the front end of the ballpoint pen tip. In the case of FIG. 12, by providing an opening / closing port at the end of the packaging bag 14 opposite to the suspension hole 14a, when the writing body 6 is put in and out of the packaging bag 14 through the opening / closing port, the operation body 7 can be easily used. The ballpoint pen tip can be prevented from being damaged.

（ペン先の出没）
本実施の形態におけるペン先６１の出没作動について説明する。
一つの操作体７の操作部７１を弾発体８の後方付勢に抗して窓孔４１に沿って前方にスライド操作すると、そのスライド操作された操作体７の前側突出部７２が、先にペン先突出状態にある他の筆記体６の操作体７の後側突出部７３を径方向外方に持ち上げる。それにより、軸筒２内壁の係止壁部４３と操作体７との係止状態が解除され、他の筆記体６が弾発体８の後方付勢により後方に移動され、他の筆記体６のペン先６１が軸筒２内に没入され、他の筆記体６の操作体７の後端が蓋部５の前面の当接壁部５１に当接衝止される。前記他の筆記体６のペン先６１の没入と同時に、前記前方にスライド操作した操作体７に連結された筆記体６のペン先６１が、軸筒２の前端孔３１より外部に突出されるとともに、前方にスライド操作された操作体７の後端が軸筒２内壁の係止壁部４３に係止され、そのペン先突出状態が維持される。 (Invitation of the nib)
A description will be given of the operation of the pen tip 61 in the present embodiment.
When the operating portion 71 of one operating body 7 is slid forward along the window hole 41 against the rear urging of the projectile 8, the front projecting portion 72 of the operating body 7 that has been slid is moved forward. Then, the rear protrusion 73 of the operating body 7 of the other writing body 6 in the pen tip protruding state is lifted radially outward. As a result, the locking state between the locking wall portion 43 of the inner wall of the shaft cylinder 2 and the operating body 7 is released, and the other writing body 6 is moved rearward by the rear urging of the projectile body 8, so that the other writing body. The pen tip 61 of 6 is immersed in the shaft cylinder 2, and the rear end of the operation body 7 of the other writing body 6 is brought into contact with and abutted against the contact wall portion 51 on the front surface of the lid portion 5. Simultaneously with the immersion of the pen tip 61 of the other writing body 6, the pen tip 61 of the writing body 6 connected to the operating body 7 slid forward is projected outside from the front end hole 31 of the shaft tube 2. At the same time, the rear end of the operating body 7 that has been slid forward is locked to the locking wall 43 of the inner wall of the shaft tube 2, and the pen tip protruding state is maintained.

（筆記体及び操作体の交換）
本実施の形態における筆記体６及び操作体７の交換について説明する。
筆記体６を交換する際、蓋部５が軸筒２の後端の開口部４２を閉鎖した状態（図３及び図７参照）から、蓋部５のヒンジ部５２と反対側の操作端部を後方に押圧し、係合部５３と被係合部４５との係合を解除し、蓋部５を後方に回動させ、軸筒２の後端の開口部４２を開口する。前記開口部４２を開口させると、前記開口部４２から各々の操作体７が、弾発体８の後方付勢により後方外部に突出される。前記軸筒２の後端の開口部４２が開口した状態（図６及び図８参照）で、操作体７を取り出すことにより、その操作体７と互いに連結状態にある筆記体６を前記開口部４２を介して軸筒２内から取り出し、その後、互いに連結状態にある新たな筆記体６と新たな操作体７とを前記開口部４２を介して軸筒２内に挿入する。そして、蓋部５の当接壁部５１に各々の操作体７の後端を当接させ、各々の操作体７を前方に押圧しながら蓋部５を前方に回動させ、その後、係合部５３と被係止部４５とを係合させ、開口部４２を閉鎖する。これにより、筆記体６及び操作体７の交換作業が終了する。 (Replace cursive and operating body)
The replacement of the writing body 6 and the operation body 7 in the present embodiment will be described.
When the cursive body 6 is replaced, the operating end portion of the lid portion 5 opposite to the hinge portion 52 from the state in which the lid portion 5 closes the opening 42 at the rear end of the shaft cylinder 2 (see FIGS. 3 and 7). Is pushed backward, the engagement between the engaging portion 53 and the engaged portion 45 is released, the lid portion 5 is rotated rearward, and the opening 42 at the rear end of the shaft tube 2 is opened. When the opening 42 is opened, each operation body 7 is protruded from the opening 42 to the outside by the rear urging of the projectile 8. In the state where the opening 42 at the rear end of the shaft cylinder 2 is opened (see FIGS. 6 and 8), the writing body 6 connected to the operation body 7 is connected to the opening by removing the operation body 7. Then, the new writing body 6 and the new operating body 7 that are connected to each other are inserted into the shaft cylinder 2 through the opening 42. Then, the rear end of each operation body 7 is brought into contact with the abutting wall portion 51 of the lid section 5, the lid section 5 is rotated forward while pressing each operation body 7 forward, and then the engagement is performed. The opening 53 is closed by engaging the portion 53 and the locked portion 45. Thereby, the exchange work of the writing body 6 and the operation body 7 is completed.

（第１の実施の形態の作用効果）
本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、筆記体６の交換時、筆記体６と操作体７が連結状態にあるため、誤って操作体７のボールペンチップ前端のボールの外径の表示１１と対応しない筆記体６を操作体７に連結をするおそれがない。 (Operational effects of the first embodiment)
In the multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment, since the writing body 6 and the operating body 7 are in a connected state when the writing body 6 is replaced, the front end of the ball-point pen tip of the operating body 7 is mistaken. There is no fear that the writing body 6 that does not correspond to the display 11 of the outer diameter of the ball is connected to the operation body 7.

本実施の形態の多芯筆記具１は、ペン先突出状態（図５参照）及びペン先没入状態（図３参照）のいずれにおいても、窓孔４１を介して、ボール外径を容易に確認できる。特に、ペン先突出状態において、ペン先６１前端の大きさを確認したい場合、再度、ペン先６１を没入させて表示部１０を確認する手間を要さず、表示部１０の確認が容易となる。 The multi-core writing instrument 1 according to the present embodiment can easily check the outer diameter of the ball through the window hole 41 in both the pen tip protruding state (see FIG. 5) and the pen tip immersed state (see FIG. 3). . In particular, when it is desired to check the size of the front end of the pen tip 61 in the pen tip protruding state, it is not necessary to immerse the pen tip 61 again to check the display unit 10, and the display unit 10 can be easily checked. .

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、前記表示１１を凸設により形成してなることにより、操作体７の外面に明確な表示１１を形成でき、表示１１の識別が容易となる（図１３参照）。 The multi-core writing instrument 1 and the multi-core writing instrument 6 according to the present embodiment can form a clear display 11 on the outer surface of the operating body 7 by forming the display 11 by projecting the display 11. Identification becomes easy (see FIG. 13).

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、表示１１を粗面にし、背景１２を平滑面にしたことにより、表示１１と背景１２とのコントラストが明確となり、一層、表示１１の識別が容易となる（図１３参照）。 In the multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment, the display 11 is made rough and the background 12 is made smooth, so that the contrast between the display 11 and the background 12 becomes clear. The display 11 can be easily identified (see FIG. 13).

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、前記背景１２が、表示１１を包囲する枠状の周縁部１３を備えることにより、操作体７の外面において表示部１０が際立ち、一層、表示部１０の視認が容易となる（図１３参照）。 In the multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment, the background 12 includes a frame-shaped peripheral portion 13 that surrounds the display 11, so that the display unit 10 is provided on the outer surface of the operation body 7. Remarkably, it becomes easier to visually recognize the display unit 10 (see FIG. 13).

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、背景１２が操作体７の外面に凹設され、表示１１が背景１２に凸設される構成である。そのため、前記表示部１０の表示１１及び背景１２が、操作体７の操作部７１側の外面より外方に殆ど突出されない構成が得られる。それにより、筆記体６の交換時やペン先６１の出没操作時に、操作体７の表示部１０が軸筒２内面や窓孔４１に引っ掛かって、筆記体６の円滑な挿入や、操作体７の円滑な摺動を妨げるおそれがない。 The multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment are configured such that the background 12 is recessed on the outer surface of the operating body 7 and the display 11 is projected on the background 12. Therefore, a configuration in which the display 11 and the background 12 of the display unit 10 hardly protrude outward from the outer surface of the operating body 7 on the operation unit 71 side is obtained. As a result, when the writing body 6 is replaced or when the pen tip 61 is moved in and out, the display unit 10 of the operating body 7 is caught by the inner surface of the shaft tube 2 and the window hole 41, so that the writing body 6 can be smoothly inserted and the operating body 7. There is no risk of preventing smooth sliding.

［第２の実施の形態］
図１４に本考案の第２の実施の形態を示す。
第２の実施の形態は、第１の実施の形態と異なる点が、表示部１０のみであり、それ以外の構成及び作用効果は第１の実施の形態と共通であるため、説明を省略する。 [Second Embodiment]
FIG. 14 shows a second embodiment of the present invention.
The second embodiment is different from the first embodiment only in the display unit 10, and the other configurations and operational effects are the same as those in the first embodiment, and thus the description thereof is omitted. .

本実施の形態では、前記背景１２は、操作体７の外面に凹設される。即ち、前記背景１２は、操作体７の外面から内方に凹んだ形状に形成される。一方、前記表示１１は、前記背景１２に凸設される。即ち、前記表示１１は、背景１２から外方に突出した形状に形成される。また、前記背景１２は、表示１１を包囲する枠状の周縁部１３を備える。前記背景１２の底面は、粗面となっている。前記表示１１の頂面は、平滑面となっている。 In the present embodiment, the background 12 is recessed on the outer surface of the operating body 7. That is, the background 12 is formed in a shape recessed inward from the outer surface of the operating body 7. On the other hand, the display 11 is projected on the background 12. That is, the display 11 is formed in a shape protruding outward from the background 12. The background 12 includes a frame-shaped peripheral portion 13 that surrounds the display 11. The bottom surface of the background 12 is a rough surface. The top surface of the display 11 is a smooth surface.

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、表示１１を平滑面にし、背景１２を粗面にしたことにより、表示１１と背景１２とのコントラストが明確となり、一層、表示１１の識別が容易となる。 In the multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment, the display 11 is made smooth and the background 12 is made rough so that the contrast between the display 11 and the background 12 becomes clear. The display 11 can be easily identified.

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、背景１２が操作体７の外面に凹設され、表示１１が背景１２に凸設される構成である。そのため、前記表示部１０の表示１１及び背景１２が、操作体７の操作部７１側の外面より外方に殆ど突出されない構成が得られる。それにより、筆記体６の交換時やペン先６１の出没操作時に、操作体７の表示部１０が軸筒２内面や窓孔４１に引っ掛かって、筆記体６の円滑な挿入や、操作体７の円滑な摺動を妨げるおそれがない。 The multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment are configured such that the background 12 is recessed on the outer surface of the operating body 7 and the display 11 is projected on the background 12. Therefore, a configuration in which the display 11 and the background 12 of the display unit 10 hardly protrude outward from the outer surface of the operation body 7 on the operation unit 71 side is obtained. Accordingly, when the writing body 6 is replaced or when the pen tip 61 is moved in and out, the display unit 10 of the operating body 7 is caught on the inner surface of the shaft tube 2 and the window hole 41, so that the writing body 6 can be smoothly inserted and the operating body 7. There is no risk of preventing smooth sliding.

［第３の実施の形態］
図１５に本考案の第３の実施の形態を示す。
第３の実施の形態は、第１の実施の形態と異なる点が、表示部１０のみであり、それ以外の構成及び作用効果は第１の実施の形態と共通であるため、説明を省略する。 [Third Embodiment]
FIG. 15 shows a third embodiment of the present invention.
The third embodiment is different from the first embodiment only in the display unit 10, and other configurations and functions and effects are the same as those in the first embodiment, and thus description thereof is omitted. .

本実施の形態では、前記背景１２は、操作体７の外面に凸設される。即ち、前記背景１２は、操作体７の外面から外方に突出した形状に形成される。一方、前記表示１１は、前記背景１２に凹設される。即ち、前記表示１１は、背景１２から内方に凹んだ形状に形成される。また、前記背景１２は、表示１１を包囲する枠状の周縁部１３を備える。前記背景１２の頂面は、粗面となっている。前記表示１１の底面は、平滑面となっている。 In the present embodiment, the background 12 is projected on the outer surface of the operating body 7. That is, the background 12 is formed in a shape protruding outward from the outer surface of the operating body 7. On the other hand, the display 11 is recessed in the background 12. That is, the display 11 is formed in a shape recessed inward from the background 12. The background 12 includes a frame-shaped peripheral portion 13 that surrounds the display 11. The top surface of the background 12 is a rough surface. The bottom surface of the display 11 is a smooth surface.

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、前記表示１１を凹設により形成してなることにより、操作体７の外面に明確な表示１１を形成でき、表示１１の識別が容易となる。 The multi-core writing instrument 1 and the multi-core writing instrument 6 according to the present embodiment can form a clear display 11 on the outer surface of the operation body 7 by forming the display 11 in a recessed manner. Identification becomes easy.

［第４の実施の形態］
図１６に本考案の第４の実施の形態を示す。
第４の実施の形態は、第１の実施の形態と異なる点が、表示部１０のみであり、それ以外の構成及び作用効果は第１の実施の形態と共通であるため、説明を省略する。 [Fourth Embodiment]
FIG. 16 shows a fourth embodiment of the present invention.
The fourth embodiment is different from the first embodiment only in the display unit 10, and other configurations and functions and effects are the same as those in the first embodiment, and thus the description thereof is omitted. .

本実施の形態では、前記背景１２は、操作体７の外面に凸設される。即ち、前記背景１２は、操作体７の外面から外方に突出した形状に形成される。一方、前記表示１１は、前記背景１２に凹設される。即ち、前記表示１１は、背景１２から内方に凹んだ形状に形成される。また、前記背景１２は、表示１１を包囲する枠状の周縁部１３を備える。前記背景１２の頂面は、平滑面となっている。前記表示１１の底面は、粗面となっている。 In the present embodiment, the background 12 is projected on the outer surface of the operating body 7. That is, the background 12 is formed in a shape protruding outward from the outer surface of the operating body 7. On the other hand, the display 11 is recessed in the background 12. That is, the display 11 is formed in a shape recessed inward from the background 12. The background 12 includes a frame-shaped peripheral portion 13 that surrounds the display 11. The top surface of the background 12 is a smooth surface. The bottom surface of the display 11 is a rough surface.

本実施の形態の多芯筆記具１及び多芯筆記具用筆記体６は、表示１１を粗面にし、背景１２を平滑面にしたことにより、表示１１と背景１２とのコントラストが明確となり、一層、表示１１の識別が容易となる。 In the multi-core writing instrument 1 and the multi-core writing instrument 6 of the present embodiment, the display 11 is made rough and the background 12 is made smooth, so that the contrast between the display 11 and the background 12 becomes clear. The display 11 can be easily identified.

本考案の多芯筆記具の第1の実施の形態の全ペン先没入状態（非筆記時）を示す縦断面図である。It is a longitudinal cross-sectional view which shows the all pen nib immersion state (at the time of non-writing) of 1st Embodiment of the multi-core writing instrument of this invention. 図１の多芯筆記具の一つのペン先が突出した状態（筆記時）を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state (at the time of writing) which one nib of the multi-core writing instrument of FIG. 1 protruded. 図１の多芯筆記具の後端の開口部を閉鎖し且つ全ペン先が没入した状態を示す側面図である。It is a side view which shows the state which closed the opening part of the rear end of the multi-core writing instrument of FIG. 1, and all the pen nibs were immersed. 図３のＡ−Ａ線拡大断面図である。It is an AA line expanded sectional view of FIG. 図１の多芯筆記具の後端の開口部を閉鎖し且つ一つのペン先が突出した状態を示す側面図である。It is a side view which shows the state which closed the opening part of the rear end of the multi-core writing instrument of FIG. 1, and the one nib protruded. 図１の多芯筆記具の後端の開口部を開口した状態を示す側面図である。It is a side view which shows the state which opened the opening part of the rear end of the multi-core writing instrument of FIG. 図１の多芯筆記具の後端の開口部を閉鎖した状態を示す要部斜視図である。It is a principal part perspective view which shows the state which closed the opening part of the rear end of the multi-core writing instrument of FIG. 図１の多芯筆記具の後端の開口部を開口した状態を示す要部斜視図である。It is a principal part perspective view which shows the state which opened the opening part of the rear end of the multi-core writing instrument of FIG. 図１の多芯筆記具に用いる筆記体の側面図である。It is a side view of the writing body used for the multi-core writing instrument of FIG. 図１の多芯筆記具に用いる筆記体の正面図である。It is a front view of the cursive body used for the multi-core writing instrument of FIG. 図１の多芯筆記具に用いる筆記体を包装袋に収容した状態を示す。The state which accommodated the writing body used for the multi-core writing instrument of FIG. 1 in the packaging bag is shown. 図１の多芯筆記具に用いる筆記体を包装袋に収容した状態を示す。The state which accommodated the writing body used for the multi-core writing instrument of FIG. 1 in the packaging bag is shown. 前記第１の実施の形態に採用された表示部を示す要部拡大斜視図である。It is a principal part expansion perspective view which shows the display part employ | adopted as the said 1st Embodiment. 本考案の第２の実施の形態の多芯筆記具に採用された表示部を示す要部拡大斜視図である。It is a principal part expansion perspective view which shows the display part employ | adopted as the multi-core writing instrument of 2nd Embodiment of this invention. 本考案の第３の実施の形態の多芯筆記具に採用された表示部を示す要部拡大斜視図である。It is a principal part expansion perspective view which shows the display part employ | adopted as the multi-core writing instrument of 3rd Embodiment of this invention. 本考案の第４の実施の形態の多芯筆記具に採用された表示部を示す要部拡大斜視図である。It is a principal part expansion perspective view which shows the display part employ | adopted as the multi-core writing instrument of 4th Embodiment of this invention.

１多芯筆記具
２軸筒
３前軸
３１前端孔
４後軸
４１窓孔
４２開口部
４２１ガイド部
４２１ａ凹部
４３係止壁部
４４クリップ
４５被係合部
５蓋部
５１当接壁部
５２ヒンジ部
５３係合部
６筆記体
６１ペン先（ボールペンチップ）
６１ａ被覆樹脂
６２インキ収容管
７操作体
７１操作部
７２前側突出部
７３後側突出部
７４嵌入部
７５鍔部
７６抜け止め突起
８弾発体
９弾発体支持部
９１内孔
９２保持部
１０表示部
１１表示
１２背景
１３周縁部
１４包装袋
１４ａ吊下孔
１４ｂ着色部 DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 3 Front shaft 31 Front end hole 4 Rear shaft 41 Window hole 42 Opening part 421 Guide part 421a Recess 43 Locking wall part 44 Clip 45 Engagement part 5 Lid part 51 Contact wall part 52 Hinge part 53 Engagement part 6 Cursive body 61 Pen point (ball-point pen tip)
61a Coating resin 62 Ink storage tube 7 Operating body 71 Operating section 72 Front projecting section 73 Rear projecting section 74 Inserting section 75 Hook section 76 Retaining projection 8 Ejection body 9 Ejection body support section 91 Inner hole 92 Holding section 10 Display Part 11 Display 12 Background 13 Peripheral part 14 Packaging bag 14a Hanging hole 14b Colored part

Claims

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, and each of the writing bodies is urged rearward by a projectile, corresponding to each writing body at the rear end of each of the writing bodies. The operating bodies are connected, and a plurality of window holes extending in the front-rear direction are provided in the radial direction on the side wall of the shaft cylinder, and the respective operating bodies are protruded radially outward from the respective window holes. By sliding the operating body forward along the window hole, the pen tip of the writing body connected to that one operating body is projected from the front end hole of the shaft tube, and the other writing that was in the protruding state first. A multi-core writing instrument that immerses the body nib into the barrel,
Provided on the outer surface of the operating body is a display unit that indicates the size of the front end of the pen tip, and the writing body and the operating body are connected to each other and can be removed from the shaft cylinder and inserted into the shaft cylinder. Multi-core writing instrument characterized by that.

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, and each of the writing bodies is urged rearward by a projectile, corresponding to each writing body at the rear end of each of the writing bodies. The operating bodies are connected, and a plurality of window holes extending in the front-rear direction are provided in the radial direction on the side wall of the shaft cylinder, and the respective operating bodies are protruded radially outward from the respective window holes. By sliding the operating body forward along the window hole, the pen tip of the writing body connected to that one operating body is projected from the front end hole of the shaft tube, and the other writing that was in the protruding state first. A multi-core writing instrument that immerses the body nib into the barrel,
A pen point of a writing body is composed of a ballpoint pen tip provided with a ball that can rotate at the front end, and a display unit indicating the outer diameter of the ball at the front end of the ballpoint pen tip is provided on the outer surface of the operation body, and the writing body and the operation body A multi-core writing instrument characterized in that, in a connected state, can be removed from the shaft tube and inserted into the shaft tube.

3. The multi-core writing instrument according to claim 1, wherein the display unit is visible from the outside in a state where the nib protrudes from the front end hole and a state where the nib is immersed in the shaft tube.

4. The multi-core writing instrument according to claim 1, wherein the display unit is visible from the outside through the window hole in a state in which the nib protrudes from the front end hole and a state in which the nib is immersed in the shaft cylinder.

The operation body is formed of a synthetic resin molded body, and a display unit is integrally formed on the outer surface of the operation body, and the display unit includes a display indicating the size of the pen tip front end or the ball pen tip front end ball diameter. The multi-core writing instrument according to any one of claims 1 to 4, wherein the display is formed by recessing or projecting.

The display unit includes a display indicating the size of the front end of the pen tip or the outer diameter of the ball at the front end of the ballpoint pen tip, and a background around the display. Either the display or the background is a smooth surface, and the other is The multi-core writing instrument according to any one of claims 1 to 5, which has a rough surface.

The multi-core writing instrument according to claim 6, wherein the background includes a frame-shaped peripheral edge surrounding the display.

When used, a plurality of tubes are accommodated in the shaft cylinder. The operating body connected to the rear end of each is protruded from the side wall of the shaft cylinder, and the pen is projected and retracted from the front end of the shaft cylinder by sliding the operating body forward. A multi-core writing instrument for writing,
A ball-point pen tip in which a ball is rotatably held at the front end in a state before being accommodated in the shaft tube, an ink-holding tube in which the ball-point pen tip is fixed to the front end and ink is accommodated therein, and the ink The operation unit is connected to the rear end of the storage tube and colored with the color of the ink in the ink storage tube, and a display unit is provided on the outer surface of the operation unit to indicate the outer diameter of the ball at the front end of the ballpoint pen tip. A writing instrument for multi-core writing instruments.