JP4754290B2

JP4754290B2 - Multi-core writing instrument

Info

Publication number: JP4754290B2
Application number: JP2005213899A
Authority: JP
Inventors: 正史安藤
Original assignee: Pilot Ink Co Ltd
Current assignee: Pilot Ink Co Ltd
Priority date: 2005-07-25
Filing date: 2005-07-25
Publication date: 2011-08-24
Anticipated expiration: 2025-07-25
Also published as: JP2007030240A

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.

従来この種の筆記具において、特許文献１には、各筆記体の後部に隆起部を設けた摺動体を連接し、隆起部を軸筒の外方に突出させ、隆起部を摺動体に着脱自在に装着したことにより、使用者の好みにあった筆記体に交換した際に、誤った筆記体の選択をすることなく、また隆起部の形状や色柄も選択可能とした構成が開示されている。 Conventionally, in this type of writing instrument, in Patent Document 1, a sliding body provided with a raised portion is connected to the rear portion of each writing body, the raised portion protrudes outward of the shaft cylinder, and the raised portion is detachable from the sliding body. A configuration has been disclosed in which the shape and color pattern of the raised portion can be selected without selecting the wrong cursive when replacing with a cursive that suits the user's preference. Yes.

特開２００３−１１５８３号公報JP 2003-11583 A

前記従来の多芯筆記具は、組立工程において、コイルスプリングを軸筒内に挿入した際、コイルスプリング同士が軸筒内で互いに絡み合い、それにより、適正な筆記体の出没作動が得られないおそれがある。 In the conventional multi-core writing instrument, when the coil spring is inserted into the shaft tube in the assembly process, the coil springs are entangled with each other in the shaft tube, so that there is a risk that the proper writing-in / out operation of the writing body cannot be obtained. is there.

また、前記従来の多芯筆記具は、ユーザーが、交換前に軸筒内に収容されていた筆記体とは異なる種類の筆記体に交換する際、摺動体を軸筒内に残した状態で、摺動体から筆記体と隆起部とを取り外し、その後、摺動体に新たな筆記体と新たな隆起部とを取り付ける。そのため、筆記体の交換作業が複雑であり、ユーザーが迅速且つ確実な交換を行うことができないおそれがあり、さらに、複数の筆記体を同時に交換する場合、誤って、筆記体とその筆記体に対応しない隆起部とを一つの摺動体に取り付けるおそれがある。また、前記隆起部は、小さな部品であるため、紛失しやすい。 The conventional multi-core writing instrument is a state in which the user leaves the sliding body in the shaft cylinder when replacing the writing body with a different type from the writing body housed in the shaft cylinder before replacement. The cursive body and the raised portion are removed from the sliding body, and then the new cursive body and the new raised portion are attached to the sliding body. Therefore, the replacement work of the cursive body is complicated, and there is a possibility that the user cannot exchange quickly and surely.In addition, when replacing plural cursive bodies at the same time, the cursive body and the cursive body are mistakenly There is a risk of attaching a non-corresponding raised portion to one sliding body. Moreover, since the said protruding part is a small component, it is easy to lose.

本発明は、前記従来の問題点を解決するものであって、組立工程においてコイルスプリングを軸筒内に挿入した際、コイルスプリング同士が軸筒内で互いに絡み合うおそれがなく、また、ユーザーが好みの筆記体とそれに対応した操作体を軸筒内に交換可能に収容でき、しかも、筆記体及び操作体を取り外した際にコイルスプリング同士が絡み合うおそれがない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。 The present invention solves the above-mentioned conventional problems, and when the coil spring is inserted into the shaft cylinder in the assembling process, there is no possibility that the coil springs are entangled with each other in the shaft cylinder, and the user likes It is intended to provide a multi-core writing instrument in which the writing body and the corresponding operation body can be accommodated in the shaft tube in a replaceable manner, and the coil springs are not entangled when the writing body and the operation body are removed. is there. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

尚、本発明でスプリング収容部２１とは、非圧縮状態のコイルスプリング８が収容される部分をいう。 In the present invention, the spring accommodating portion 21 refers to a portion where the uncompressed coil spring 8 is accommodated.

[１]本発明は、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を後方に付勢する複数のコイルスプリング８を軸筒２内に収容し、前記各々の筆記体６の後端に操作体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、各々の筆記体６を軸筒２内から取り外し交換可能に構成するとともに、軸筒２の後端に、窓孔４１を後方に開口させる開閉自在の開口部４２を設け、前記開口部４２を通して操作体７を、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、軸筒２内壁にコイルスプリング８の前端が当接するスプリング支持部９を設け、前記スプリング支持部９の後方の軸筒２内に、各々のコイルスプリング８を収容する複数のスプリング収容部２１を設け、前記スプリング収容部２１の相互間に、各々のコイルスプリング８同士の接触を回避する隔壁４４を設けたこと（請求項１）を要件とする。 [ 1] In the present invention, a plurality of writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and a plurality of coil springs 8 for urging the writing bodies 6 rearward are disposed in the shaft cylinder 2. The operation body 7 is connected to the rear end of each of the writing bodies 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 operation bodies 7 is projected outward in the radial direction, and one operation body 7 is slid forward along the window hole 41, whereby the pen tip of the writing body 6 connected to the one operation body 7. 61 is a multi-core writing instrument that causes the pen tip 61 of another writing body 6 that has been in the protruding state to be immersed in the shaft cylinder 2 while protruding from the front end hole 31 of the shaft cylinder 2. Is configured to be removable from the shaft cylinder 2 and replaceable, and a window hole 41 is opened rearward at the rear end of the shaft cylinder 2. An opening 42 that can be closed is provided, and the operating body 7 can be removed from the shaft tube 2 and inserted into the shaft tube 2 through the opening 42, and the front end of the coil spring 8 contacts the inner wall of the shaft tube 2. A spring support portion 9 is provided in contact therewith, and a plurality of spring accommodating portions 21 for accommodating the respective coil springs 8 are provided in the shaft cylinder 2 at the rear of the spring support portion 9. It is a requirement that a partition wall 44 for avoiding contact between the coil springs 8 is provided (Claim 1 ).

前記多芯筆記具１（請求項１）は、スプリング収容部２１の相互間に、各々のコイルスプリング８同士の接触を回避する隔壁４４を設けたことにより、組立工程において、コイルスプリング８を軸筒２内に挿入した際、コイルスプリング８同士が軸筒２内で互いに絡み合うおそれがない。それにより、筆記体６の出没の作動不良が生じるおそれがない。尚、本発明でスプリング収容部２１とは、非圧縮状態のコイルスプリング８が収容される部分をいう。 The multi-core writing instrument 1 (Claim 1 ) is provided with a partition wall 44 that avoids contact between the coil springs 8 between the spring accommodating portions 21, so that the coil spring 8 can be connected to the shaft cylinder in the assembly process. There is no possibility that the coil springs 8 are entangled with each other in the shaft cylinder 2 when inserted into the shaft 2. Thereby, there is no possibility that the operation failure of the writing body 6 will appear. In the present invention, the spring accommodating portion 21 refers to a portion where the uncompressed coil spring 8 is accommodated.

前記多芯筆記具１（請求項１）は、ユーザーが軸筒２内の筆記体６を取り外して好みの筆記体６に交換できると同時に、操作体７も、軸筒２内から取り外してその筆記体６に適正に対応したものに交換でき、筆記体６と操作体７との誤った連結を防止できる。もし、操作体７が軸筒２内から取り外し交換できない構成の場合、交換できる筆記体６の種類は、軸筒２内に収容された操作体７に対応した筆記体６のみに限られ、ユーザーが好みの筆記体６を自由に交換できない。また、前記多芯筆記具１（請求項１）は、従来のような小さな部品の交換を必要とせず、迅速且つ確実な交換作業を行うことができる。 In the multi-core writing instrument 1 (Claim 1 ), the user can remove the writing body 6 in the shaft tube 2 and replace it with a favorite writing body 6, and at the same time, the operating body 7 is also removed from the shaft tube 2 and the writing is made. It can be exchanged for one that properly corresponds to the body 6, and erroneous connection between the writing body 6 and the operating body 7 can be prevented. If the operation body 7 cannot be removed from the shaft cylinder 2 and replaced, the type of the writing body 6 that can be replaced is limited to the writing body 6 corresponding to the operation body 7 accommodated in the shaft cylinder 2. However, I cannot exchange my favorite cursive 6 freely. Further, the multi-core writing instrument 1 (Claim 1 ) does not require replacement of small parts as in the prior art, and can perform a quick and reliable replacement operation.

また、筆記体６及び操作体７を交換可能にしたことにより、筆記体６及び操作体７を軸筒２内から取り外したとき、少なくともコイルスプリング８の後端は軸筒２内においてフリーな状態となるため、軸筒２内に残るコイルスプリング８同士が接触して絡み合うおそれがある。しかし、前記多芯筆記具１（請求項１）は、スプリング収容部２１の相互間に、各々のコイルスプリング８同士の接触を回避する隔壁４４を設けたことにより、筆記体６及び操作体７を軸筒２内から取り外して軸筒２内のコイルスプリング８の後端がフリーな状態となっても、コイルスプリング８同士が接触せず、コイルスプリング８同士が絡み合うおそれがない。 In addition, since the writing body 6 and the operation body 7 can be exchanged, when the writing body 6 and the operation body 7 are removed from the shaft cylinder 2, at least the rear end of the coil spring 8 is free in the shaft cylinder 2. For this reason, the coil springs 8 remaining in the shaft cylinder 2 may come into contact with each other and become entangled. However, the multi-core writing instrument 1 (Claim 1 ) is provided with a partition wall 44 that avoids contact between the coil springs 8 between the spring accommodating portions 21. Even if it is removed from the shaft cylinder 2 and the rear end of the coil spring 8 in the shaft cylinder 2 is free, the coil springs 8 do not come into contact with each other, and there is no possibility that the coil springs 8 will be entangled with each other.

尚、前記多芯筆記具１（請求項１）において、各々の筆記体６は、軸筒２の後端の開口部４２を通して交換してもよいし、あるいは、軸筒２の前方に開口する開口部を設け、その開口部を通して交換してもよい。前記軸筒２の後端の開口部４２は、少なくとも、操作体７を軸筒２から取り外す時及び操作体７を軸筒２内に挿入する時に開口していればよい。 In the multi-core writing instrument 1 (Claim 1 ), each writing body 6 may be exchanged through the opening 42 at the rear end of the shaft tube 2, or an opening opened in front of the shaft tube 2. A portion may be provided and replaced through the opening. The opening 42 at the rear end of the shaft cylinder 2 only needs to be open at least when the operating body 7 is removed from the shaft cylinder 2 and when the operating body 7 is inserted into the shaft cylinder 2.

［２］前記多芯筆記具１（請求項１）において、前記隔壁４４が、軸筒２内壁またはスプリング支持部９に一体に形成されること（請求項２）が好ましい。 [ 2 ] In the multi-core writing instrument 1 (Claim 1 ), the partition wall 44 is preferably formed integrally with the inner wall of the shaft tube 2 or the spring support part 9 (Claim 2 ).

前記多芯筆記具１（請求項２）は、隔壁４４を形成するための新たな部品が不要となり、部品点数が増加することを回避できる。 The multi-core writing instrument 1 (Claim 2 ) does not require a new part for forming the partition wall 44, and can avoid an increase in the number of parts.

［３］前記多芯筆記具１（請求項１または２）において、前記スプリング支持部９にコイルスプリング８の前端部を径方向に保持する保持部９２を形成すること（請求項３）が好ましい。 [ 3 ] In the multi-core writing instrument 1 (Claim 1 or 2 ), it is preferable that a holding portion 92 that holds the front end portion of the coil spring 8 in the radial direction is formed on the spring support portion 9 (Claim 3 ).

前記多芯筆記具１（請求項３）は、操作体７を軸筒２内から取り外したとき、コイルスプリング８の前端部が保持部９２により径方向に保持されているため、コイルスプリング８が軸筒２内から外部に脱落することを防止できる。もし、コイルスプリング８が軸筒２内から外部に脱落すると、新たな操作体７を挿入する際に再びコイルスプリング８を挿入する手間を要し、その上、コイルスプリング８が紛失するおそれがある。前記保持部９２がコイルスプリング８の前端部を径方向に保持する構成は、例えば、コイルスプリング８の前端部外面を径方向内方に保持する構成、あるいは、コイルスプリング８の前端部内面を径方向外方に保持する構成が挙げられる。 In the multi-core writing instrument 1 (Claim 3 ), the front end portion of the coil spring 8 is held in the radial direction by the holding portion 92 when the operating body 7 is removed from the shaft cylinder 2, so that the coil spring 8 is pivoted. It is possible to prevent the cylinder 2 from dropping out. If the coil spring 8 is dropped from the shaft cylinder 2 to the outside, it takes time to insert the coil spring 8 again when the new operating body 7 is inserted, and the coil spring 8 may be lost. . The configuration in which the holding portion 92 holds the front end portion of the coil spring 8 in the radial direction is, for example, a configuration in which the outer surface of the front end portion of the coil spring 8 is held inward in the radial direction, or the inner surface of the front end portion of the coil spring 8 has a diameter. The structure hold | maintained outside a direction is mentioned.

請求項１の多芯筆記具によれば、組立工程においてコイルスプリングを軸筒内に挿入した際、コイルスプリング同士が軸筒内で互いに絡み合うおそれがない。また、ユーザーが好みの筆記体に交換できると同時に、操作体も、その筆記体に適正に対応したものに交換でき、筆記体と操作体との誤った連結を防止できる。しかも、従来のような小さな部品の交換を必要とせず、迅速且つ確実な交換作業を行うことができる。その上、筆記体及び操作体を軸筒内から取り外して軸筒内のコイルスプリングの後端がフリーな状態となっても、コイルスプリング同士が接触せず、コイルスプリング同士が絡み合うおそれがない。 According to the multi-core writing instrument of the first aspect , when the coil spring is inserted into the shaft cylinder in the assembling process, there is no possibility that the coil springs are entangled with each other in the shaft cylinder. Further, at the same time that the user can replace the cursive body with a favorite one, the operation body can also be replaced with an appropriate one corresponding to the cursive body, and erroneous connection between the cursive body and the operation body can be prevented. In addition, it is possible to perform a quick and reliable replacement operation without requiring replacement of small parts as in the prior art. Moreover, even if the writing body and the operating body are removed from the shaft cylinder and the rear end of the coil spring in the shaft cylinder is in a free state, the coil springs do not contact each other, and there is no possibility that the coil springs will be entangled.

請求項２の多芯筆記具によれば、隔壁を形成するための新たな部品が不要となり、部品点数が増加することを回避できる。 According to the multi-core writing instrument of the second aspect , a new part for forming the partition wall is unnecessary, and an increase in the number of parts can be avoided.

請求項３の多芯筆記具によれば、操作体を軸筒内から取り外したとき、コイルスプリングの前端部が保持部により径方向に保持されているため、コイルスプリングが軸筒内から外部に脱落することを防止できる。 According to the multi-core writing instrument of claim 3 , when the operating body is removed from the shaft tube, the front end portion of the coil spring is held in the radial direction by the holding portion, so that the coil spring falls off from the shaft tube to the outside. Can be prevented.

図１乃至図５に本発明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る。前記軸筒２内には、前記筆記体６の本数に対応した複数（具体的には２個）のコイルスプリング８が収容される。前記各々の筆記体６は、前記各々のコイルスプリング８により、後方に付勢されている。前記コイルスプリング８は、具体的には圧縮コイルスプリングである。 1 to 5 show an embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, two) of the writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. A plurality (specifically, two) of coil springs 8 corresponding to the number of the writing bodies 6 are accommodated in the shaft cylinder 2. Each of the writing bodies 6 is urged rearward by each of the coil springs 8. Specifically, the coil spring 8 is 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（１８０度対称位置）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て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 symmetrical positions (180 degree symmetrical positions) 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.

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が一体に形成され、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。 A locking wall portion 43 made of a rib extending in the front-rear direction is integrally formed on the inner surface of the side wall between the window holes 41 of the rear shaft 4, and a pen tip 61 projects from the locking wall portion 43. In this case, the rear end of the operating body 7 of the writing body 6 is locked.

（隔壁）
また、前記軸筒２の内壁（即ち後軸４の内壁）には、前後方向に延び且つ径方向内方に突出する２本のリブよりなる隔壁４４が、軸線に対して対称位置に一体に形成される。前記隔壁４４は、前記係止壁部４３の相互間に形成されるとともに、その前端が、スプリング支持部９の後方且つ窓孔４１の前方に位置される。即ち、隔壁４４の前端は、スプリング収容部２１内に位置され、少なくとも、フリー状態のコイルスプリング８の後端より前方に位置される。 (Partition wall)
A partition wall 44 formed of two ribs extending in the front-rear direction and projecting inward in the radial direction is integrally formed on the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear shaft 4) at a symmetrical position with respect to the axis. It is formed. The partition wall 44 is formed between the locking wall portions 43, and the front end thereof is positioned behind the spring support portion 9 and in front of the window hole 41. That is, the front end of the partition wall 44 is positioned in the spring accommodating portion 21 and is positioned at least in front of the rear end of the free coil spring 8.

前記後軸４の窓孔４１の相互間の側壁外面には、クリップ４６が設けられる。 A clip 46 is provided on the outer surface of the side wall between the window holes 41 of the rear shaft 4.

（スプリング支持部）
軸筒２の内壁（即ち後軸４の内壁）には、円筒状のスプリング支持部９が固着される。前記スプリング支持部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。前記スプリング支持部９の後面と、各々の操作体７の鍔部７５の前面との間には、コイルスプリング８が配置される。前記各々のコイルスプリング８の内部に筆記体６が遊挿されるとともに、各々のコイルスプリング８の前端はスプリング支持部９の後面により係止され、各々のコイルスプリング８の後端は操作体７の鍔部７５の前面に係止される。尚、前記スプリング支持部９は、軸筒２内壁に一体に形成されてもよい。 (Spring support)
A cylindrical spring support portion 9 is fixed to the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear shaft 4). The spring support portion 9 has a plurality of (specifically, two) inner holes 91 through which the writing body 6 is inserted in the axial direction. A coil spring 8 is disposed between the rear surface of the spring support portion 9 and the front surface of the collar portion 75 of each operation body 7. The writing body 6 is loosely inserted into each coil spring 8, the front end of each coil spring 8 is locked by the rear surface of the spring support 9, and the rear end of each coil spring 8 is the operation body 7. Locked to the front surface of the collar portion 75. The spring support portion 9 may be formed integrally with the inner wall of the shaft tube 2.

また、前記スプリング支持部９の後面の各々の内孔９１の周囲には、周状壁部よりなる保持部９２が形成される。前記各々の保持部９２の内面には、各々のコイルスプリング８の前端部外面が圧入保持される。即ち、各々の保持部９２により各々のコイルスプリング８の前端部が径方向内方に保持される。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を通して各々のコイルスプリング８が脱落することを防止できる。 A holding portion 92 made of a circumferential wall portion is formed around each inner hole 91 on the rear surface of the spring support portion 9. The outer surface of the front end portion of each coil spring 8 is press-fitted and held on the inner surface of each holding portion 92. That is, the front end portion of each coil spring 8 is held radially inward by each holding portion 92. Thereby, when each writing body 6 and the operation body 7 are exchanged, each coil spring 8 can be prevented from dropping out from the shaft cylinder 2 through the opening 42.

本実施の形態において、筆記体６及び操作体７を交換するとき以外は、前記各々のコイルスプリング８が、各々の操作体７（即ち各々の筆記体６）を後方に付勢している。前記各々のコイルスプリング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。 In the present embodiment, except when the writing body 6 and the operation body 7 are replaced, each of the coil springs 8 urges each operation body 7 (that is, each writing body 6) backward. Each of the coil springs 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 is prevented.

（スプリング収容部）
前記スプリング支持部９の後方の軸筒２内（即ち後軸４内）には、複数（具体的には２個）のスプリング収容部２１が形成される。前記スプリング収容部２１の相互間には前記隔壁４４が配置される。本実施の形態では、前記隔壁４４は、１８０度対称位置より径方向内方に突出される２本のリブからなり、中央部において連結されておらず、隙間を有する構成が採用されているが、これ以外にも、前記隔壁４４は、スプリング収容部２１の相互間を完全に隔離する構成でもよい。また、前記各々のスプリング収容部２１を構成する軸筒２内壁（即ち後軸４内壁）には、コイルスプリング８の一部を収容可能な凹部４５が形成されている。 (Spring housing)
A plurality (specifically, two) of spring accommodating portions 21 are formed in the shaft cylinder 2 (that is, in the rear shaft 4) behind the spring support portion 9. The partition wall 44 is disposed between the spring accommodating portions 21. In the present embodiment, the partition wall 44 is composed of two ribs projecting radially inward from the 180-degree symmetrical position, and is not connected at the center portion but has a gap. In addition, the partition 44 may be configured to completely separate the spring accommodating portions 21 from each other. In addition, a concave portion 45 capable of accommodating a part of the coil spring 8 is formed in the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear shaft 4) constituting each of the spring accommodating portions 21.

（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４６を正面視したときのクリップ４６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、衝止される。 (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 portion of the lid portion 5 is rotatably connected to the clip base portion by a hinge portion 52. The hinge portion 52 extends in the left-right direction of the clip 46 when the clip 46 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 bumped to the contact wall 51.

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４７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）の内面には、内向突起が形成され、一方、前記被係合部４７（係合凸部）の外面には、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 47 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 of the engagement portion 53 (engagement recess or engagement hole), while the outer surface of the engaged portion 47 (engagement projection) climbs over the inward projection. A lockable outward projection is formed.

前記係合部５３と前記被係合部４７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）、コイルスプリング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 47 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 over and locked). ), The contact between the operating body 7 and the abutting wall 51 on the front surface of the lid 5 by biasing the coil spring 8 backward does not release the engaged state, and the lid 5 does not open.

また、前記係合部５３と被係合部４７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４７が係合凹部または係合孔部からなる構成でもよい。 In addition to the configuration of the engaging portion 53 and the engaged portion 47, the engaging portion 53 is an engaging convex portion, and the engaged portion 47 is an engaging concave portion or an engaging hole portion. But you can.

（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コイルスプリング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でもよい。また、ボールペンチップは、インキ収容管６２の前端開口部４２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４２に固着される。 The ballpoint pen tip may be configured such that a ball held rotatably at the front end is biased forward by a coil spring or the like, 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 42 of the ink containing tube 62 by press fitting or the like, but in the present embodiment, it is fixed to the front end opening 42 of the ink containing tube 62 via the pen tip holder. The

（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前側突出部７２と、該操作部７１の反対側の前側突出部７２の後方に設けられる後側突出部７３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、コイルスプリング８の後端が係止される。 (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 and projecting outside from the window hole 41 of the shaft cylinder 2, a front projecting portion 72 provided on the opposite side of the operating portion 71, A rear projecting portion 73 provided behind the front projecting portion 72 on the opposite side of the 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 on the rear side. 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. The rear end of the coil spring 8 is locked to the front surface of the flange portion 75.

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に衝止される。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 immersive state, the rear end portion of the operating body 7 attached to the writing body 6 is hit by an abutting 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 the other projecting state when the operating portion 71 of the operating body 7 is slid forward. The pendant projecting state of the other cursive body 6 is released by contacting the rear projecting portion 73 of the operating body 7 connected to the rear end of the cursive body 6.

（識別表示）
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。 (Identification display)
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 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 writing body 6 before the replacement that exists outside the shaft cylinder 2 can be easily identified from the outside.

また、各々の筆記体６がペン先６１のボールのサイズが互いに異なるボールペンの場合、ペン先６１のボールの外径寸法を表す数字よりなる識別表示を、操作体７の操作部７１に設けることが好ましい。また、各々の筆記体６がペン先６１の形状が互いに異なる筆記具の場合、ペン先６１の形状に対応した識別表示を、操作体７の操作部７１に設けることが好ましい。また、前記ペン先６１のボールの外径寸法を表す数字からなる識別表示、及びペン先６１の形状に対応した識別表示は、前記インキ色に着色された操作体７の操作部７１に設けることもできる。前記識別表示は、印刷、シール貼付、凸設、凹設等の手段により、操作体７に設けられる。 Further, when each of the writing bodies 6 is a ballpoint pen having a different ball size at the nib 61, an identification display made up of a number representing the outer diameter of the ball at the nib 61 is provided on the operation unit 71 of the operation body 7. Is preferred. Further, when each writing body 6 is a writing instrument having a different shape of the pen tip 61, it is preferable to provide an identification display corresponding to the shape of the pen tip 61 on the operation unit 71 of the operation body 7. Further, an identification display consisting of a number representing the outer diameter of the ball of the pen point 61 and an identification display corresponding to the shape of the pen point 61 are provided on the operation portion 71 of the operation body 7 colored in the ink color. You can also. The identification display is provided on the operation body 7 by means such as printing, sticking a sticker, protruding, or recessed.

（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（図１及び図２参照）。
一つの操作体７の操作部７１をコイルスプリング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がコイルスプリング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 (see FIGS. 1 and 2).
When the operating portion 71 of one operating body 7 is slid forward along the window hole 41 against the back bias of the coil spring 8, the front projecting portion 72 of the operating body 7 that has been slid is moved forward. The rear projecting portion 73 of the operating body 7 of the other writing body 6 in the projecting state is lifted radially outward. As a result, the locking state of the locking wall portion 43 of the inner wall of the shaft tube 2 and the operating body 7 is released, and the other writing body 6 is moved rearward by the rear biasing of the coil spring 8, and the other writing body 6 is moved. The pen tip 61 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１参照）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４７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、コイルスプリング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３参照）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を通して軸筒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を通して軸筒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 operation end on the side opposite to the hinge 52 of the lid 5 is moved backward from the state in which the lid 5 closes the opening 42 at the rear end of the barrel 2 (see FIG. 1). By pressing, the engagement between the engaging portion 53 and the engaged portion 47 is released, the lid portion 5 is rotated backward, and the opening 42 at the rear end of the shaft tube 2 is opened. When the opening 42 is opened, the respective operating bodies 7 are protruded from the opening 42 to the outside by the rear bias of the coil spring 8. In the state where the opening 42 at the rear end of the shaft cylinder 2 is opened (see FIG. 3), the writing body 6 that is connected to the operation body 7 is taken out through the opening 42 by taking out the operation body 7. The new writing body 6 and the new operation body 7 which are taken out from the shaft cylinder 2 and are connected to each other are inserted into the shaft cylinder 2 through the opening 42. Then, each operating body 7 is brought into contact with the abutting wall portion 51 of the lid 5, and the lid 5 is rotated forward while pressing each operating body 7 forward. The locked portion 45 is engaged and the opening 42 is closed. Thereby, the exchange work of the writing body 6 and the operation body 7 is completed.

（挿入時のコイルスプリング）
本実施の形態の多芯筆記具１の組立工程において、複数のコイルスプリング８を軸筒２内に挿入した際、前記隔壁４４により、軸筒２内でコイルスプリング８同士が絡み合うことがない。 (Coil spring during insertion)
In the assembly process of the multi-core writing instrument 1 of the present embodiment, when the plurality of coil springs 8 are inserted into the shaft tube 2, the coil springs 8 are not entangled in the shaft tube 2 by the partition wall 44.

（筆記具及び操作体の交換時のコイルスプリング）
また、本実施の形態の多芯筆記具１の筆記具及び操作体７の交換時において、互いに連結状態の筆記体６及び操作体７を軸筒２後端の開口部４２を通して軸筒２内から取り外すと、軸筒２内において、コイルスプリング８の後端部がフリーな状態となる。一方、このとき、コイルスプリング８の前端部がスプリング支持部９の保持部９２により保持されている。 (Coil spring when changing the writing instrument and operation body)
Further, when the writing tool and the operating body 7 of the multi-core writing instrument 1 according to the present embodiment are replaced, the writing body 6 and the operating body 7 connected to each other are removed from the shaft cylinder 2 through the opening 42 at the rear end of the shaft cylinder 2. In the shaft cylinder 2, the rear end portion of the coil spring 8 is free. On the other hand, at this time, the front end portion of the coil spring 8 is held by the holding portion 92 of the spring support portion 9.

次に、互いに連結状態の新たな筆記体６及び操作体７を後軸４後端の開口部４２より挿入し、筆記体６をコイルスプリング８内部に挿入する際、誤って筆記体６の前端をコイルスプリング８後端に当接させ、コイルスプリング８を径方向に変形させても、隔壁４４により、コイルスプリング８同士が互いに接触することを回避できる。その結果、コイルスプリング８同士が絡み合うおそれがない。 Next, when the new writing body 6 and the operating body 7 which are connected to each other are inserted from the opening 42 at the rear end of the rear shaft 4 and the writing body 6 is inserted into the coil spring 8, the front end of the writing body 6 is mistakenly inserted. Even if the coil spring 8 is brought into contact with the rear end of the coil spring 8 and the coil spring 8 is deformed in the radial direction, the partition walls 44 can prevent the coil springs 8 from contacting each other. As a result, there is no possibility that the coil springs 8 will be entangled with each other.

本発明の多芯筆記具の実施の形態における全ペン先没入状態（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) in 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開口させ、操作体を僅かに引き出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. 1, and pulled out the operation body slightly. 図１の多芯筆記具における筆記体及び操作体を軸筒内から取り外した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which removed the writing body and operation body in the multi-core writing instrument of FIG. 1 from the axial cylinder. 図４のＡ−Ａ線拡大断面図である。It is the AA line expanded sectional view of FIG.

１多芯筆記具
２軸筒
２１スプリング収容部
３前軸
３１前端孔
４後軸
４１窓孔
４２開口部
４３係止壁部
４４隔壁
４５凹部
４６クリップ
４７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）
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
８コイルスプリング
９スプリング支持部
９１内孔
９２保持部 DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 21 Spring accommodating part 3 Front axis 31 Front end hole 4 Rear axis 41 Window hole 42 Opening part 43 Locking wall part 44 Partition 45 Recess 46 Clip 47 Engagement part 5 Lid part 51 Contact wall part 52 Hinge part 53 Engagement part 6 Cursive body 61 Pen tip (ball-point pen tip)
62 Ink Containment Tube 7 Operating Body 71 Operating Part 72 Front Projecting Part 73 Rear Projecting Part 74 Insertion Part 75 Collar Part 8 Coil Spring 9 Spring Support Part 91 Inner Hole 92 Holding Part

Claims

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, and a plurality of coil springs for urging the respective writing bodies rearward are accommodated in the shaft cylinder, and are attached to the rear ends of the writing bodies. The operation bodies are connected, a plurality of window holes extending in the front-rear direction are provided in the side wall of the shaft cylinder in the radial direction, and the respective operation bodies are protruded radially outward from the respective window holes. By sliding the body forward along the window hole, the pen tip of the writing body connected to the one operating body is projected from the front end hole of the shaft tube, and the other writing body that was in the protruding state first This is a multi-core writing instrument that immerses the pen tip in the shaft tube, and each writing body can be removed from the shaft tube and can be replaced, and a window hole can be opened at the rear end of the shaft tube. The operating body can be removed from the shaft tube through the opening, and Insertably constructed into the cylinder, a spring support portion front end of the coil spring abuts on the shaft tube inner wall, said spring support portion of the rear of the barrel in a plurality of spring accommodating portion for accommodating each coil spring And a partition that avoids contact between the coil springs is provided between the spring accommodating portions.

The multi-core writing instrument according to claim 1, wherein the partition wall is formed integrally with the inner wall of the shaft tube or the spring support portion .

The multi-core writing instrument according to claim 1 or 2, wherein a holding portion for holding the front end portion of the coil spring in the radial direction is formed on the spring support portion .