JP5137739B2

JP5137739B2 - Multi-core writing instrument

Info

Publication number: JP5137739B2
Application number: JP2008204835A
Authority: JP
Inventors: 尚利早川
Original assignee: Pilot Ink Co Ltd
Current assignee: Pilot Ink Co Ltd
Priority date: 2008-08-07
Filing date: 2008-08-07
Publication date: 2013-02-06
Anticipated expiration: 2028-08-07
Also published as: JP2010036536A

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、前記各々の筆記体のペン先を選択的に出没させる多芯筆記具に関する。 The present invention relates to a multi-core writing instrument. More specifically, the present invention relates to a multi-core writing instrument that houses a plurality of writing bodies in a shaft cylinder and selectively causes the pen tip of each writing body to appear and disappear.

従来この種の多芯筆記具において、特許文献１には、ペン先没入状態にある筆記体を前方に移動させることによって揺動部材のカム部を径方向に移動させ、それにより、先にペン先突出状態にある筆記体のスライダーとノック筒体の先端との係止状態を解除する構造が記載されている。さらに、特許文献１には、各々のスライダーが、前記カム部と係合可能で且つ互いに異なる方向へカム部を揺動させるカム面を２つ有することが記載されている。
特開平１１−１８００９２号公報 Conventionally, in this type of multi-core writing instrument, Patent Document 1 discloses that the cam part of the swinging member is moved in the radial direction by moving the writing body in the pen tip immersive state forward, thereby leading to the tip of the pen tip first. A structure is described in which the locked state of the slider of the cursive body in the protruding state and the tip of the knock cylinder is released. Further, Patent Document 1 describes that each slider has two cam surfaces that can be engaged with the cam portion and swing the cam portion in different directions.
Japanese Patent Laid-Open No. 11-180092

前記特許文献１の多芯筆記具は、各々のスライダー（本願の操作体に相当）が、２つのカム面を有するため、スライダーの構造が特殊な形状となり、一般的な形状の操作体（即ち操作体同士が直接当接してペン先突出状態を解除するタイプ）を採用することが困難となり、その結果、操作体の部品コストが上昇するおそれがある。 In the multi-core writing instrument of Patent Document 1, each slider (corresponding to the operation body of the present application) has two cam surfaces, so the slider has a special shape, and thus an operation body having a general shape (that is, an operation body). It is difficult to adopt a type in which the bodies directly contact each other to release the pen tip protruding state, and as a result, there is a risk that the cost of parts of the operating body increases.

また、従来の多芯筆記具において、一般に、軸筒内に収容する筆記体の本数が多くなるに従い、軸筒の外径も大きくなり、その結果、操作体の径方向の長さ（即ち操作部と解除突起との径方向の距離）も長くなり、筆記体の収容本数の比較的少ない多芯筆記具（例えば筆記体の収容本数が２本〜３本の多芯筆記具）と、筆記体の収容本数の多い多芯筆記具（例えば筆記体の収容本数が４本〜５本の多芯筆記具）とでは、操作体の形状を共通にすることは困難であった。 Further, in the conventional multi-core writing instrument, generally, as the number of writing bodies accommodated in the shaft cylinder increases, the outer diameter of the shaft cylinder increases, and as a result, the radial length of the operating body (that is, the operating portion) And the release protrusions in the radial direction), and a multi-core writing instrument (for example, a multi-core writing instrument having two to three cursive letters) containing a relatively small number of cursive letters, and accommodating the cursive letters. It is difficult to make the shape of the operation body common with a large number of multi-core writing instruments (for example, multi-core writing instruments having 4 to 5 writing bodies).

本発明は、前記従来の問題点を解決するものであって、一般的な形状の操作体を採用でき、しかも、筆記体の収容本数の多い多芯筆記具であっても筆記体の収容本数の少ない多芯筆記具と操作体の形状を共通にでき、その結果、操作体の部品コストの上昇を抑え、ユーザーに安価に提供できる多芯筆記具を得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」とは反対側を指す。 The present invention solves the above-mentioned conventional problems, and can employ a generally shaped operating body, and even a multi-core writing instrument having a large number of cursive letters can accommodate a large number of cursive letters. An object of the present invention is to obtain a multi-core writing instrument that can be provided to a user at a low cost by suppressing an increase in the component cost of the operation instrument, since the shape of the operation instrument can be made common to a few multi-core writing instruments. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

［１］本願の第１の発明は、軸筒２内に複数の筆記体７を前後方向に移動可能に収容し、前記各々の筆記体７を弾発体９により後方に付勢し、前記各々の筆記体７の後端に操作体８を連結し、前記軸筒２の側壁に前後方向に延びる複数の窓孔２２ａを径方向に貫設し、前記各々の窓孔２２ａから径方向外方に前記各々の操作体８を突出させ、一つの操作体８を窓孔２２ａ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８に連結された筆記体７のペン先７１を軸筒２の前端孔２１ａ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７のペン先７１を軸筒２内に没入させてなり、前記各々の操作体８が、前記軸筒２の窓孔２２ａより径方向外方に突出する操作部８１と該操作部８１の径方向反対側に位置する解除突起８２とを備え、前記軸筒２の内壁に、ペン先突出状態にある筆記体７の後端に連結された操作体８が係止される係止壁部２２ｂを設けた多芯筆記具であって、前記軸筒２内部の軸心に、後方への移動が規制されるとともに径方向に変位可能な可動部５を配置し、前記可動部５が、軸方向に延びる複数本の突条５１と、前記隣り合う突条５１と突条５１の間に形成される軸方向に延びる複数本の溝５２とを備え、前記各々の溝５２に、各々の筆記体７に連結された操作体８の解除突起８２が摺動可能に構成され、一つの筆記体７のペン先７１が前端孔２１ａより突出状態にあるとき、前記ペン先突出状態にある筆記体７の後端に連結された操作体８が、前記係止壁部２２ｂに係止されるとともに、前記ペン先突出状態の筆記体７の後端に連結された操作体８の解除突起８２が、前記可動部５を径方向に押圧変位させてなり、前記ペン先突出状態において、ペン先没入状態にある他の筆記体７の後端に連結された操作体８を前方にスライド操作したとき、前記他の筆記体７の後端に連結された操作体８の解除突起８２が、前記溝５２の後端開口縁に摺接することにより前記可動部５が径方向に押圧変位され、前記可動部５が、先にペン先突出状態にある筆記体７の後端に連結された操作体８を径方向外方に押し上げ、前記ペン先突出状態にある筆記体７の後端に連結された操作体８と前記係止壁部２２ｂとの係止状態を解除してなることを要件とする。 [1] In the first invention of the present application, a plurality of writing bodies 7 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 7 is urged rearward by a resilient body 9, An operating body 8 is connected to the rear end of each writing body 7, and a plurality of window holes 22a extending in the front-rear direction are provided in the side wall of the shaft tube 2 in the radial direction, and radially outward from the respective window holes 22a. Each of the operating bodies 8 protrudes in the direction, and one operating body 8 is slid forward along the window hole 22a, whereby the pen tip 71 of the writing body 7 connected to the one operating body 8 is pivoted. In addition to projecting from the front end hole 21a of the tube 2, the pen tip 71 of the other writing body 7 that has been in the projecting state is immersed in the shaft tube 2, and each operating body 8 is moved to the shaft tube 2 The operation portion 81 that protrudes radially outward from the window hole 22a and the release protrusion 8 that is located on the opposite side of the operation portion 81 in the radial direction A multi-core writing instrument provided on the inner wall of the shaft cylinder 2 with a locking wall portion 22b for locking the operating body 8 connected to the rear end of the writing body 7 in a pen tip protruding state. A movable portion 5 that is restricted in the rearward movement and is radially displaceable is disposed at the axial center inside the shaft cylinder 2, and the movable portion 5 includes a plurality of protrusions 51 extending in the axial direction. , The adjacent protrusions 51 and a plurality of axially extending grooves 52 formed between the protrusions 51, and the operation bodies 8 connected to the respective writing bodies 7 in the grooves 52. When the release protrusion 82 is configured to be slidable, and the pen tip 71 of one writing body 7 is in a protruding state from the front end hole 21a, the operating body connected to the rear end of the writing body 7 in the pen tip protruding state. 8 is locked to the locking wall portion 22b and is connected to the rear end of the writing body 7 in the pen tip protruding state. A release projection 82 of the operating body 8 is configured to press and displace the movable portion 5 in the radial direction, and is connected to the rear end of another writing body 7 in the pen tip protruding state in the pen tip protruding state. When the slide 8 is slid forward, the release projection 82 of the operating body 8 connected to the rear end of the other writing body 7 is brought into sliding contact with the rear end opening edge of the groove 52 so that the movable portion 5 has a diameter. And the movable part 5 pushes the operating body 8 connected to the rear end of the writing body 7 in the pen tip protruding state radially outward, and the writing body in the pen tip protruding state. 7, the locking state between the operating body 8 connected to the rear end and the locking wall portion 22 b is released.

前記第１の発明の多芯筆記具１は、操作体８を特殊な形状とする必要がなく、一般的な形状の操作体８を採用でき、一般的な形状の操作体８を採用した他の多芯筆記具と操作体８を共通にでき、しかも、筆記体７の収容本数が比較的多く且つ軸筒２の外径が比較的大きい多芯筆記具であっても、筆記体７の収容本数が比較的少なく且つ軸筒２の外径が比較的小さい多芯筆記具と操作体８を共通にできる。したがって、前記第１の発明の多芯筆記具１は、操作体８の部品コストの上昇を抑え、ユーザーに安価に提供できる。 The multi-core writing instrument 1 according to the first aspect of the present invention does not require the operating body 8 to have a special shape, and can employ a general-shaped operating body 8, which employs a general-shaped operating body 8. Even if the multi-core writing instrument and the operation body 8 can be used in common, and the multi-core writing instrument has a relatively large number of the writing bodies 7 and a relatively large outer diameter of the shaft tube 2, the number of the writing bodies 7 can be accommodated. The multi-core writing instrument and the operation body 8 that are relatively small and have a relatively small outer diameter of the shaft tube 2 can be used in common. Therefore, the multi-core writing instrument 1 according to the first aspect of the present invention can suppress the increase in the component cost of the operation body 8 and can be provided to the user at low cost.

［２］本願の第２の発明は、前記第１の発明において、前記軸筒２の軸心に、軸方向に延び且つ径方向に撓み変形可能な軸部４を設け、前記軸部４の一端を軸筒２の内壁に固定し、前記軸部４の他端を径方向に変位可能に設け、前記径方向に変位可能な軸部４端部に前記可動部５を設けたことを要件とする。 [2] In a second invention of the present application, in the first invention, a shaft portion 4 extending in the axial direction and deformable in the radial direction is provided at the shaft center of the shaft tube 2, and the shaft portion 4 One end is fixed to the inner wall of the shaft cylinder 2, the other end of the shaft portion 4 is provided to be displaceable in the radial direction, and the movable portion 5 is provided to the end portion of the shaft portion 4 displaceable in the radial direction And

前記第２の発明の多芯筆記具１は、可動部５を、容易に、後方への移動が規制され且つ径方向に変位可能な構成にできるとともに、可動部５を、軸筒２内の適正位置に確実且つ容易に配置することができる。 The multi-core writing instrument 1 according to the second aspect of the invention allows the movable part 5 to be configured such that the rearward movement is easily restricted and can be displaced in the radial direction, and the movable part 5 can be appropriately fitted in the shaft tube 2. It can be reliably and easily arranged at the position.

［３］本願の第３の発明は、前記第１または第２の発明において、前記各々の溝５２の後端開口縁に傾斜面５３を設けたことを要件とする。 [3] The third invention of the present application is that, in the first or second invention, an inclined surface 53 is provided at a rear end opening edge of each of the grooves 52.

前記第３の発明の多芯筆記具１は、各々の溝５２の後端開口縁に傾斜面５３を設けたことにより、前方にスライド操作された操作体８の解除突起８２が、スムーズに溝５２の開口縁と摺接し、可動部５を容易に径方向に押圧変位させることができ、その結果、ペン先突出状態にある筆記体７の後端に連結された操作体８と係止壁部２２ｂとの係止状態を、容易に解除することができる。 In the multi-core writing instrument 1 according to the third aspect of the present invention, since the inclined surface 53 is provided at the opening edge of the rear end of each groove 52, the release protrusion 82 of the operating body 8 that is slid forward is smoothly inserted into the groove 52. The movable portion 5 can be easily pressed and displaced in the radial direction by sliding contact with the opening edge of the opening, and as a result, the operating body 8 and the locking wall portion connected to the rear end of the writing body 7 in the pen tip protruding state. The locked state with 22b can be easily released.

［４］本願の第４の発明は、前記第１、第２または第３の発明において、前記各々の溝５２の後端開口縁に摺接される解除突起８２の前面に傾斜面８２ｃを設けたことを要件とする。 [4] In a fourth invention of the present application, in the first, second, or third invention, an inclined surface 82c is provided on the front surface of the release protrusion 82 that is in sliding contact with the rear end opening edge of each groove 52. Is a requirement.

前記第４の発明の多芯筆記具１は、前記解除突起８２の前面に傾斜面８２ｃを設けたことにより、前方にスライド操作された操作体８の解除突起８２が、スムーズに溝５２の開口縁と摺接し、可動部５を容易に径方向に押圧変位させることができ、その結果、ペン先突出状態にある筆記体７の後端に連結された操作体８と係止壁部２２ｂとの係止状態を、容易に解除することができる。 In the multi-core writing instrument 1 according to the fourth aspect of the present invention, since the inclined surface 82c is provided on the front surface of the release protrusion 82, the release protrusion 82 of the operating body 8 that is slid forward is smoothly opened to the opening edge of the groove 52. The movable portion 5 can be easily pressed and displaced in the radial direction, and as a result, the operating body 8 and the locking wall portion 22b connected to the rear end of the writing body 7 in the pen tip protruding state. The locked state can be easily released.

［５］本願の第５の発明は、前記第１、第２、第３または第４の発明において、前記軸筒２内壁に、前記各々の筆記体７を後方に付勢する弾発体９を支持し且つ前記各々の筆記体７が挿通可能な内孔３１が貫通された弾発体支持体３を固定し、前記弾発体支持体３の後端軸心に前記軸部４を一体に形成し、前記弾発体支持体３の後端より前記軸部４を後方に突出させ、前記軸部４の後端部に前記可動部５を一体に形成したことを要件とする。 [5] According to a fifth invention of the present application, in the first, second, third, or fourth invention, the elastic body 9 that urges each of the writing bodies 7 backward on the inner wall of the shaft cylinder 2. And the elastic body support 3 through which the inner hole 31 through which each of the writing bodies 7 can be inserted is fixed, and the shaft portion 4 is integrated with the rear axis of the elastic body support 3. The shaft portion 4 is protruded rearward from the rear end of the projectile support 3 and the movable portion 5 is integrally formed at the rear end portion of the shaft portion 4.

前記第５の発明の多芯筆記具１は、部品点数の増加及び組立工程の増加を抑え、製造コストの上昇を防止できる。 The multi-core writing instrument 1 according to the fifth aspect of the invention can suppress an increase in the number of parts and an assembly process, and can prevent an increase in manufacturing cost.

［６］本願の第５の発明は、前記第１、第２、第３、第４または第５の発明において、筆記体７の後端に操作体８が連結された状態で、筆記体７を軸筒２内から取り出し可能且つ軸筒２内に挿入可能であり、軸筒２内に４本以上の筆記体７が収容されることを要件とする。 [6] A fifth invention of the present application is the first, second, third, fourth, or fifth invention, wherein the operating body 8 is connected to the rear end of the writing body 7, and the writing body 7 Is required to be able to be taken out from the shaft tube 2 and inserted into the shaft tube 2, and four or more writing bodies 7 be accommodated in the shaft tube 2.

前記第６の発明の多芯筆記具１は、筆記体７の後端に操作体８が連結された状態で、筆記体７を軸筒２内から取り出し可能且つ軸筒２内に挿入可能であり、軸筒２内に４本以上の筆記体７が収容されることにより、２本または３本の筆記体７のみを収容可能な軸筒２を備えた多芯筆記具と、共通の形状の操作体８を使用できるため、操作体８が連結された状態で筆記体７を交換する際、操作体８の形状の種類を区別する必要がなくなり、筆記体７の交換作業が容易となる。 The multi-core writing instrument 1 according to the sixth aspect of the invention is capable of taking out the writing body 7 from the shaft cylinder 2 and inserting it into the shaft cylinder 2 in a state where the operating body 8 is connected to the rear end of the writing body 7. A multi-core writing instrument having a shaft cylinder 2 that can accommodate only two or three writing bodies 7 by accommodating four or more writing bodies 7 in the shaft cylinder 2, and operation of a common shape Since the body 8 can be used, when exchanging the writing body 7 in a state where the operating body 8 is connected, it is not necessary to distinguish the type of the shape of the operating body 8 and the replacement work of the writing body 7 becomes easy.

尚、本発明で、筆記体７とは、例えば、ボールペン、マーキングペン、シャープペンシル等が挙げられる。尚、本発明で、軸筒２は、筆記体７のペン先７１が突出可能な前端孔２１ａを備えた前軸と、側壁に窓孔２２ａを備える後軸とからなる構成でもよい。また、本発明で、軸筒２内に収容する筆記体７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。本発明の多芯筆記具１では、軸筒２内に収容する筆記体７の本数は、４本以上が好ましい。 In the present invention, examples of the writing body 7 include a ballpoint pen, a marking pen, and a mechanical pencil. In the present invention, the shaft cylinder 2 may be composed of a front shaft provided with a front end hole 21a from which the pen tip 71 of the writing body 7 can protrude and a rear shaft provided with a window hole 22a on the side wall. Further, in the present invention, the number of the writing bodies 7 accommodated in the shaft tube 2 may be two or more, and specifically, 2, 3, 4, 5, 6, etc. may be mentioned. It is done. In the multi-core writing instrument 1 of the present invention, the number of the writing bodies 7 accommodated in the shaft tube 2 is preferably four or more.

本発明は、一般的な形状の操作体を採用でき、しかも、筆記体の収容本数の多い多芯筆記具であっても筆記体の収容本数の少ない多芯筆記具と操作体の形状を共通にでき、その結果、操作体の部品コストの上昇を抑え、ユーザーに安価に提供できる。 The present invention can adopt an operation tool having a general shape, and even if it is a multi-core writing instrument having a large number of cursive letters, the shape of the operation tool can be made common to a multi-core writing instrument having a small number of cursive letters. As a result, it is possible to suppress the increase in the cost of parts of the operating body and to provide the user with low cost.

＜第１の実施の形態＞
図１乃至図１５に本発明の第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４本）の筆記体７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７は、弾発体９（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 15 show a first embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, four) of writing bodies 7 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. Each of the writing bodies 7 is urged rearward by an elastic body 9 (specifically, a compression coil spring).

（軸筒）
前記軸筒２は、先細円筒状の前軸２１と、該前軸２１の後端に接続される円筒状の後軸２２とからなる。本実施の形態では、前記弾発体支持体３の前端が前記前軸２１の後端開口部に固着され、前記弾発体支持体３の後端が前記後軸２２の前端開口部に固着される。前記弾発体支持体３によって、前記前軸２１の後端と、前記後軸２２の前端とが接続される。 (Shaft tube)
The shaft cylinder 2 includes a tapered cylindrical front shaft 21 and a cylindrical rear shaft 22 connected to the rear end of the front shaft 21. In the present embodiment, the front end of the projectile support 3 is fixed to the rear end opening of the front shaft 21, and the rear end of the projectile support 3 is fixed to the front end opening of the rear shaft 22. Is done. The rear end of the front shaft 21 and the front end of the rear shaft 22 are connected by the projectile support 3.

前記前軸２１の前端軸心には、各々の筆記体７のペン先７１が突出可能な前端孔２１ａが軸方向に貫設される。前記前軸２１及び後軸２２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。 A front end hole 21a through which the pen tip 71 of each writing body 7 can protrude is provided in the front end axis of the front shaft 21 in the axial direction. The front shaft 21 and the rear shaft 22 are obtained by injection molding of a synthetic resin (for example, polycarbonate).

前記後軸２２の後部の側壁には、複数本（具体的には４本）の前後方向に延びる細長状の窓孔２２ａが、径方向に貫設される。前記４本の窓孔２２ａは、互いに、円周方向に９０度回転した位置に等間隔に形成される。前記窓孔２２ａと窓孔２２ａの間の後軸２２の一つの側壁には、クリップ２２ｅが設けられる。 A plurality of (specifically, four) elongated window holes 22 a extending in the front-rear direction are provided in a radial direction on the side wall of the rear portion of the rear shaft 22. The four window holes 22a are formed at equal intervals at positions rotated 90 degrees in the circumferential direction. A clip 22e is provided on one side wall of the rear shaft 22 between the window hole 22a and the window hole 22a.

前記後軸２２の各々の窓孔２２ａ相互間の側壁内面には、軸方向に延びるリブよりなる係止壁部２２ｂが一体に形成される。前記係止壁部２２ｂに、ペン先突出状態の筆記体７の後端に連結された操作体８の後端が係止される。 A locking wall portion 22b made of a rib extending in the axial direction is integrally formed on the inner surface of the side wall between the window holes 22a of the rear shaft 22. The rear end of the operating body 8 connected to the rear end of the writing body 7 in the pen tip protruding state is locked to the locking wall portion 22b.

（蓋部）
図１４及び図１５に示すように、前記各々の窓孔２２ａの後端は、軸筒２後端より後方に切り欠き状に開口する開口部２２ｃが形成される。前記軸筒２の後端（即ち後軸２２の後端）には、前記開口部２２ｃを開閉自在にする蓋部６が設けられる。前記蓋部６は、ヒンジ部６３に回動自在に取り付けられる。前記蓋部６の前面には、当接壁部６１が形成される。前記当接壁部６１に、没入状態の筆記体７の後端に連結された各々の操作体８の後端が当接される。 (Cover)
As shown in FIGS. 14 and 15, the rear end of each of the window holes 22 a is formed with an opening 22 c that opens in a cutout shape behind the rear end of the shaft cylinder 2. At the rear end of the shaft cylinder 2 (that is, the rear end of the rear shaft 22), a lid portion 6 that allows the opening 22c to be opened and closed is provided. The lid portion 6 is rotatably attached to the hinge portion 63. An abutting wall portion 61 is formed on the front surface of the lid portion 6. The rear end of each operation body 8 connected to the rear end of the immersed writing body 7 is brought into contact with the contact wall portion 61.

前記蓋部６の前面には、係合部６２（具体的には係合孔）が設けられ、前記後軸２２の後端には、前記係合部６２と係合可能な被係合部２２ｄ（具体的には係合突起）が設けられる。前記係合部６２と前記被係合部２２ｄとは、蓋部６が開口部２２ｃを閉鎖した際、互いに係合状態にあり、弾発体９の後方への付勢による操作体８と蓋部６前面の当接壁部６１との当接では、その係合状態は解除されず、蓋部６が開くことはない。 An engagement portion 62 (specifically, an engagement hole) is provided on the front surface of the lid portion 6, and an engaged portion that can be engaged with the engagement portion 62 is provided at the rear end of the rear shaft 22. 22d (specifically, an engaging protrusion) is provided. The engaging portion 62 and the engaged portion 22d are in an engaged state when the lid portion 6 closes the opening portion 22c, and the operating body 8 and the lid by urging the projectile body 9 backward. In contact with the contact wall portion 61 on the front surface of the portion 6, the engaged state is not released and the lid portion 6 does not open.

（弾発体支持体）
軸筒２の内壁（即ち前軸２１の後端開口部内壁及び後軸２２の前端開口部内壁）には、円筒状の弾発体支持体３が固着される。図１２及び図１３に示すように、前記弾発体支持体３は、筆記体７が挿通される複数（具体的には４個）の内孔３１が軸方向に貫設されている。前記弾発体支持体３の後面と、各々の操作体８の鍔部８５の前面との間には、弾発体９が配置される。前記各々の弾発体９の内部に筆記体７が遊挿される。前記各々の弾発体９の前端は弾発体支持体３の後面により係止され、前記各々の弾発体９の後端は操作体８の鍔部８５の前面に係止される。前記弾発体支持体３は、合成樹脂の射出成形から得られる。 (Bullet support)
A cylindrical projectile support 3 is fixed to the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear end opening of the front shaft 21 and the inner wall of the front end opening of the rear shaft 22). As shown in FIGS. 12 and 13, the bullet support body 3 has a plurality of (specifically, four) inner holes 31 through which the writing body 7 is inserted in the axial direction. A bullet body 9 is disposed between the rear surface of the bullet body support 3 and the front surface of the collar portion 85 of each operation body 8. A writing body 7 is loosely inserted into each of the bullets 9. The front end of each of the projectiles 9 is locked by the rear surface of the projectile support 3, and the rear end of each of the projectile bodies 9 is locked to the front surface of the collar portion 85 of the operation body 8. The projectile support 3 is obtained by injection molding of synthetic resin.

また、弾発体支持体３の後面の各々の内孔３１の周囲には、後方に突出する筒状突出部よりなる保持部３２が形成される。前記各々の保持部３２の内面は、各々の弾発体９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７及び操作体８を交換する際、軸筒２内から開口部２２ｃを通して各々の弾発体９が脱落することを防止できる。 Further, around each inner hole 31 on the rear surface of the projectile support 3, a holding portion 32 made of a cylindrical projecting portion projecting rearward is formed. The inner surface of each holding portion 32 is press-fitted and held at the outer surface of the front end portion of each bullet member 9. Thereby, when each writing body 7 and the operation body 8 are exchanged, it is possible to prevent each of the projectile bodies 9 from falling out of the shaft tube 2 through the opening 22c.

また、前記保持部３２の後端には、各々の弾発体９同士の接触を回避する隔壁３３が形成される。前記各々の隔壁３３は、前記保持部３２の後端より軸方向後方に延設される。 In addition, a partition wall 33 is formed at the rear end of the holding portion 32 so as to avoid contact between the respective bullets 9. Each of the partition walls 33 extends axially rearward from the rear end of the holding portion 32.

（軸部）
前記弾発体支持体３の後端面の軸心には、軸方向に延びる棒状の軸部４が後方に突設される。前記軸部４は、弾発体支持体３の後端面の軸心に一体に形成される。前記軸部４は、弾発体支持体３と同じ材料の合成樹脂からなる。前記軸部４は、径方向に撓み変形可能（即ち径方向に弾性変形可能）である。前記軸部４の後端部は、軸部４自体の撓み変形により径方向に変位可能である。 (Shaft)
A rod-shaped shaft portion 4 extending in the axial direction is provided at the rear of the shaft center of the rear end surface of the projectile support 3 so as to protrude rearward. The shaft portion 4 is integrally formed with the shaft center of the rear end surface of the elastic body support 3. The shaft portion 4 is made of a synthetic resin made of the same material as the elastic body support 3. The shaft portion 4 can be bent and deformed in the radial direction (that is, elastically deformable in the radial direction). The rear end portion of the shaft portion 4 can be displaced in the radial direction by the bending deformation of the shaft portion 4 itself.

（可動部）
前記軸部４の後端部には、可動部５が一体に形成される。前記可動部５は、係止壁部２２ｂの前端より前方に配置される。前記可動部５が、軸方向に延びる複数本（４本）の突条５１と、前記隣り合う突条５１と突条５１の間に形成された軸方向に延びる複数本（４本）の溝５２とを備える。前記各々の溝５２に、各々の筆記体７の操作体８の解除突起８２（第１の解除突起８２ａ及び第２の解除突起８２ｂ）が摺動可能に構成される。前記各々の突条５１は、円周方向に９０度回転した位置に等間隔に配置される。前記各々の溝５２は、円周方向に９０度回転した位置に等間隔に配置される。 (movable part)
A movable portion 5 is integrally formed at the rear end portion of the shaft portion 4. The movable portion 5 is disposed in front of the front end of the locking wall portion 22b. The movable portion 5 includes a plurality of (four) protrusions 51 extending in the axial direction, and a plurality (four) grooves extending between the adjacent protrusions 51 and the protrusions 51 extending in the axial direction. 52. In each of the grooves 52, a release protrusion 82 (a first release protrusion 82a and a second release protrusion 82b) of the operation body 8 of each writing body 7 is configured to be slidable. The protrusions 51 are arranged at equal intervals at positions rotated 90 degrees in the circumferential direction. The grooves 52 are arranged at equal intervals at positions rotated 90 degrees in the circumferential direction.

前記可動部５の各々の溝５２によって、一つの筆記体７のペン先７１が突出した際、他のペン先没入状態の筆記体７の操作体８と可動部５が強く接触することを回避でき、可動部５の適正な径方向の変位が可能となる。 When the pen point 71 of one writing body 7 protrudes by each groove 52 of the movable part 5, it is avoided that the operating part 8 of the other pen point immersion state 7 and the movable part 5 come into strong contact with each other. It is possible to displace the movable portion 5 in the appropriate radial direction.

本実施の形態では、径方向の可撓性を備えた棒状の軸部４の後端部に可動部５を設けたことにより、可動部５が軸方向後方への移動が規制されるとともに、可動部５が径方向に変位可能（径方向に可動自在）に構成され、しかも、可動部５の円周方向の回転が抑制される。 In the present embodiment, by providing the movable portion 5 at the rear end portion of the rod-shaped shaft portion 4 having radial flexibility, the movable portion 5 is restricted from moving rearward in the axial direction, The movable part 5 is configured to be displaceable in the radial direction (movable in the radial direction), and the rotation of the movable part 5 in the circumferential direction is suppressed.

（傾斜面）
前記各々の溝５２の後端開口縁には、傾斜面５３が形成される。前記傾斜面５３は、各々の溝５２の開口縁の全領域に設けてもよいが、少なくとも、後端開口縁の径方向外端部に設けられる。本実施の形態では、各々の溝５２の後端開口縁の径方向外端部の対向する両側のみに設けられる。前記傾斜面５３は、前記傾斜面５３に沿って前方に移動するに従い内方の溝５２に接近する形状を有する。前記傾斜面５３は、円錐面状であってもよいが、本実施の形態では、平面状の傾斜面からなる。 (Inclined surface)
An inclined surface 53 is formed at the rear end opening edge of each groove 52. The inclined surface 53 may be provided in the entire region of the opening edge of each groove 52, but is provided at least at the radially outer end portion of the rear end opening edge. In the present embodiment, the grooves 52 are provided only on opposite sides of the radially outer end of the rear end opening edge of each groove 52. The inclined surface 53 has a shape that approaches the inner groove 52 as it moves forward along the inclined surface 53. The inclined surface 53 may be conical, but in the present embodiment, the inclined surface 53 is a flat inclined surface.

（弾発体）
前記各々の弾発体９は、各々の操作体８（即ち各々の筆記体７）を、常時、後方に付勢している。前記各々の弾発体９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７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８の前後のがたつきが防止される。 (Bullet)
Each of the projectile bodies 9 always urges each operation body 8 (that is, each writing body 7) backward. Each of the bullets 9 is in a compressed state (that is, a state in which the writing body 7 is urged rearward) in both the pen tip protruding state and the pen tip immersing state. Shaking back and forth is prevented.

（筆記体）
前記各々の筆記体７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７１）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７２とからなる。前記インキ収容管７２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７２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 7 is a ball-point pen refill, and includes a ball-point pen tip (that is, a pen tip 71) 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. Tube 72. Inside the ink storage tube 72, water-based gel ink having shear thinning viscosity, low-viscosity water-based ink, low-viscosity oil-based ink, or ink composed of high-viscosity oil-based ink is stored. When the ink is a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, or a low-viscosity oil-based ink, a high-viscosity fluid that advances as the ink is consumed is disposed at the rear end of the ink in the ink containing tube 72. 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でもよい。また、ボールペンチップは、インキ収容管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７２の前端開口部に固着される。 Further, the ballpoint pen tip may be configured such that a ball held rotatably at the front end is urged forward by a projectile or the like, and the ball is brought into close contact with the inner surface of the front end edge portion. In addition, the ballpoint pen tip may be directly attached to the front end opening of the ink containing tube by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 72 via the pen tip holder.

（操作体）
前記各々の筆記体７の後端（即ちインキ収容管７２の後端開口部）には、操作体８が取り付けられる。前記各々の操作体８は、後端部に形成され且つ軸筒２の窓孔２２ａから外部に突出する操作部８１と、該操作部８１の径方向反対側の後端に設けられる第１の解除突起８２ａと、該操作部８１の径方向反対側の第１の解除突起８２ａの前方に設けられる第２の解除突起８２ｂと、前端部に形成され且つインキ収容管７２の後端開口部に嵌入される嵌入部８４と、該嵌入部８４の後方に形成される鍔部８５とを備える。前記嵌入部８４は、インキ収容管７２の後端開口部に嵌入された際、インキ収容管７２の後端開口部を完全には塞がず、インキ収容管７２の内部と外部とを通気可能にする。また、前記鍔部８５の前面には、弾発体９の後端が係止される。また、前記操作体８の両方の側面には係止突起８６が形成される。前記係止突起８６は窓孔２２ａの両側壁に係合可能である。前記操作体８は、合成樹脂（例えば、ポリプロピレン樹脂、ＡＢＳ樹脂、ポリアセタール樹脂等）の成形体により得られる。 (Operation body)
An operation body 8 is attached to the rear end of each of the writing bodies 7 (that is, the rear end opening of the ink containing tube 72). Each of the operating bodies 8 is formed at the rear end portion and protrudes to the outside from the window hole 22a of the shaft tube 2, and a first end provided at the rear end of the operating portion 81 on the opposite side in the radial direction. A release protrusion 82 a, a second release protrusion 82 b provided in front of the first release protrusion 82 a on the opposite side of the operation portion 81 in the radial direction, a front end portion, and a rear end opening portion of the ink containing tube 72. A fitting portion 84 to be fitted and a flange portion 85 formed at the rear of the fitting portion 84 are provided. The insertion portion 84 does not completely block the rear end opening of the ink storage tube 72 when inserted into the rear end opening of the ink storage tube 72, and can vent the inside and the outside of the ink storage tube 72. To. The rear end of the projectile 9 is locked to the front surface of the flange portion 85. Further, locking projections 86 are formed on both side surfaces of the operating body 8. The locking projection 86 is engageable with both side walls of the window hole 22a. The operation body 8 is obtained by a molded body of a synthetic resin (for example, polypropylene resin, ABS resin, polyacetal resin, etc.).

前記第２の解除突起８２ｂの前面には、傾斜面８２ｃが形成される。前記傾斜面８２ｃは、後方に向かうに従い軸筒２の軸心に近付く形状を有する。 An inclined surface 82c is formed on the front surface of the second release protrusion 82b. The inclined surface 82c has a shape that approaches the axial center of the shaft cylinder 2 as it goes rearward.

尚、本発明において、本実施の形態以外に、第１の解除突起８２ａと第２の解除突起８２ｂの間に凹部を形成せず（即ち第１の解除突起８２ａと第２の解除突起８２ｂとの間を凹部で分離せず）、前記第１の解除突起８２ａと前記第２の解除突起８２ｂとを一つの解除突起８２からなる構成にしてもよい。 In the present invention, a recess is not formed between the first release projection 82a and the second release projection 82b (that is, the first release projection 82a and the second release projection 82b The first release projection 82a and the second release projection 82b may be configured by a single release projection 82, without separating them by a recess.

（ペン先没入状態）
筆記体７のペン先７１が没入状態のとき、その筆記体７に取り付けられた操作体８の後端部は、窓孔２２ａ後端に形成された当接壁部６１に当接される。筆記体７の全てのペン先７１が没入状態のとき、前記可動部５は、軸筒２の軸心に位置している。 (Immersion state of the nib)
When the pen point 71 of the writing body 7 is in an immersive state, the rear end portion of the operating body 8 attached to the writing body 7 is brought into contact with a contact wall portion 61 formed at the rear end of the window hole 22a. When all the pen nibs 71 of the writing body 7 are in an immersive state, the movable part 5 is located at the axial center of the shaft tube 2.

（ペン先突出状態）
一方、一つの筆記体７のペン先７１が突出状態のとき、その筆記体７に取り付けられた操作体８の後端部は、軸筒２の内面の係止壁部２２ｂに係止されるとともに、前記ペン先突出状態の筆記体７の後端に連結された操作体８の第１の解除突起８２ａにより、前記可動部５が軸筒２の軸心から径方向に押圧変位される。 (The pen tip protrudes)
On the other hand, when the pen point 71 of one writing body 7 is in the protruding state, the rear end portion of the operating body 8 attached to the writing body 7 is locked to the locking wall portion 22 b on the inner surface of the shaft tube 2. At the same time, the movable portion 5 is pressed and displaced in the radial direction from the axial center of the shaft tube 2 by the first release protrusion 82a of the operating body 8 connected to the rear end of the writing body 7 in the pen tip protruding state.

（ペン先７１の出没作動）
本実施の形態におけるペン先の出没作動について説明する。 (Intrusion operation of the nib 71)
The pen tip operation in the present embodiment will be described.

・解除操作１
図９及び図１０に、先にペン先突出状態にある筆記体７に対して隣接する、ペン先没入状態の他の筆記体７（即ち先にペン先突出状態にある筆記体７に対して軸筒２の円周方向に９０度隔てた位置にある筆記体７）の操作体８を前方に押圧操作（スライド操作）する場合を示す。
前記押圧操作した他の筆記体７後端に設けた操作体８の第２の解除突起８２の前面の傾斜面８２ｃが、可動部５の溝５２の後端開口縁の傾斜面５３に摺接し、可動部５が径方向に押圧変位され、可動部５が軸筒２の軸心に位置されるとともに、前記可動部５が、先にペン先突出状態にある筆記体７の後端に連結された操作体８を径方向外方に押し上げ、それにより、ペン先突出状態にある筆記体７後端に設けた操作体８と係止壁部２２ｂとの係止状態が解除される。前記押圧操作した他の筆記体７のペン先７１を突出させるには、さらに、押圧操作を続け、前記押圧操作した他の筆記体７後端に設けた操作体８が係止壁部２２ｂに係止され、前記押圧操作した筆記体７のペン先７１が突出状態となる。・ Release operation 1
9 and 10, the other writing body 7 adjacent to the writing body 7 in the pen tip protruding state (ie, the writing body 7 in the pen tip protruding state earlier). The case where the operation body 8 of the writing body 7) located 90 degrees apart in the circumferential direction of the shaft cylinder 2 is pressed forward (sliding operation) is shown.
The inclined surface 82c on the front surface of the second release projection 82 of the operating body 8 provided at the rear end of the other pressed body 7 that has been pressed is brought into sliding contact with the inclined surface 53 on the opening edge of the rear end of the groove 52 of the movable portion 5. The movable part 5 is pressed and displaced in the radial direction, the movable part 5 is positioned at the axial center of the shaft tube 2, and the movable part 5 is connected to the rear end of the writing body 7 that is in the pen tip protruding state first. The operation body 8 thus pushed up is pushed outward in the radial direction, whereby the locked state between the operation body 8 provided at the rear end of the writing body 7 in the pen tip protruding state and the locking wall portion 22b is released. In order to project the pen point 71 of the other pressed body 7 that has been pressed, the pressing operation is further continued, and the operating body 8 provided at the rear end of the other pressed body 7 is moved to the locking wall portion 22b. The pen tip 71 of the cursive body 7 that is locked and pressed is in a protruding state.

・解除操作２
図１１に、先にペン先突出状態にある筆記体７に対して径方向反対側にある、ペン先没入状態の他の筆記体７（即ち先にペン先突出状態にある筆記体７に対して軸筒２の円周方向に１８０度隔てた位置にある筆記体７）の操作体８を前方に押圧操作する場合を示す。
前記押圧操作した他の筆記体７後端に設けた操作体８の第２の解除突起８２ｂの前面の傾斜面８２ｃが、可動部５の溝５２の後端開口縁（ここでは傾斜面を備えない部分）に摺接し、可動部５が径方向に押圧変位され、可動部５が軸筒２の軸心に位置されるとともに、前記可動部５が、先にペン先突出状態にある筆記体７の後端に連結された操作体８を径方向外方に押し上げ、それにより、ペン先突出状態にある筆記体７後端に設けた操作体８と係止壁部２２ｂとの係止状態が解除される。前記押圧操作した他の筆記体７のペン先７１を突出させるには、さらに、押圧操作を続け、前記押圧操作した他の筆記体７後端に設けた操作体８が係止壁部２２ｂに係止され、前記押圧操作した筆記体７のペン先が突出状態となる。・ Release operation 2
FIG. 11 shows another cursive body 7 in the pen tip immersion state (ie, relative to the cursive body 7 in the pen tip projecting state first) on the opposite side in the radial direction to the cursive body 7 in the pen tip projecting state first. The case where the operation body 8 of the writing body 7) at a position 180 degrees apart in the circumferential direction of the shaft cylinder 2 is pushed forward is shown.
The inclined surface 82c on the front surface of the second release projection 82b of the operating body 8 provided at the rear end of the other pressed body 7 that has been pressed is provided with the rear end opening edge (here, the inclined surface is provided with the inclined surface) of the groove 52 of the movable portion 5. And the movable part 5 is pressed and displaced in the radial direction, the movable part 5 is positioned at the axial center of the shaft tube 2, and the movable part 5 is in the pen tip protruding state first. The operating body 8 connected to the rear end of the actuator 7 is pushed outward in the radial direction, whereby the operating body 8 provided at the rear end of the writing body 7 in the pen tip protruding state and the locking wall portion 22b are locked. Is released. In order to project the pen point 71 of the other pressed body 7 that has been pressed, the pressing operation is further continued, and the operating body 8 provided at the rear end of the other pressed body 7 is moved to the locking wall portion 22b. The pen tip of the cursive body 7 that is locked and pressed is in a protruding state.

（筆記体及び操作体の交換）
本実施の形態における筆記体７及び操作体８の交換について説明する。（図１４及び図１５参照）
筆記体７を交換する際、蓋部６が軸筒２の後端の開口部２２ｃを閉鎖した状態から、蓋部６のヒンジ部６３と反対側の操作端部を後方に押圧し、係合部６２と被係合部２２ｄとの係合を解除し、蓋部６を後方に回動させ、軸筒２の後端の開口部２２ｃを開口する。前記軸筒２の後端の開口部２２ｃが開口した状態で、操作体８を取り出すことにより、その操作体８と互いに連結状態にある筆記体７を前記開口部２２ｃ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７と新たな操作体８とを前記開口部２２ｃを介して軸筒２内に挿入する。そして、蓋部６の当接壁部６１に各々の操作体８を当接させ、各々の操作体８を前方に押圧しながら蓋部６を前方に回動させ、その後、係合部６２と被係合部２２ｄとを係合させ、開口部２２ｃを閉鎖する。これにより、筆記体７及び操作体８の交換作業が終了する。 (Replace cursive and operating body)
The replacement of the writing body 7 and the operation body 8 in the present embodiment will be described. (See FIGS. 14 and 15)
When exchanging the cursive body 7, from the state in which the cover 6 closes the opening 22c at the rear end of the shaft tube 2, the operation end opposite to the hinge 63 of the cover 6 is pressed backward to engage. The engagement between the portion 62 and the engaged portion 22d is released, the lid portion 6 is rotated rearward, and the opening 22c at the rear end of the shaft tube 2 is opened. When the operating body 8 is taken out with the opening 22c at the rear end of the shaft cylinder 2 opened, the writing body 7 connected to the operating body 8 is connected to the inside of the shaft cylinder 2 through the opening 22c. Then, a new writing body 7 and a new operation body 8 that are connected to each other are inserted into the shaft cylinder 2 through the opening 22c. Then, each operation body 8 is brought into contact with the contact wall portion 61 of the lid portion 6, and the lid portion 6 is rotated forward while pressing each operation body 8 forward. The engaged portion 22d is engaged, and the opening 22c is closed. Thereby, the exchange work of the writing body 7 and the operation body 8 is completed.

＜第２の実施の形態＞
図１６乃至図２６に本発明の第２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５本）の筆記体７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７は、弾発体９（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。 <Second Embodiment>
16 to 26 show a second embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, five) of writing bodies 7 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. Each of the writing bodies 7 is urged rearward by an elastic body 9 (specifically, a compression coil spring).

前記後軸２２の後部の側壁には、複数本（具体的には５本）の前後方向に延びる細長状の窓孔２２ａが、径方向に貫設される。前記５本の窓孔２２ａは、互いに、円周方向に７２度回転した位置に等間隔に形成される。前記窓孔２２ａと窓孔２２ａの間の後軸２２の一つの側壁には、クリップ２２ｅが設けられる。 A plurality of (specifically, five) elongated window holes 22 a extending in the front-rear direction are provided in a radial direction on the side wall of the rear portion of the rear shaft 22. The five window holes 22a are formed at equal intervals at positions rotated 72 degrees in the circumferential direction. A clip 22e is provided on one side wall of the rear shaft 22 between the window hole 22a and the window hole 22a.

（蓋部）
前記各々の窓孔２２ａの後端は、第１の実施の形態と同様、軸筒２後端より後方に切り欠き状に開口する開口部２２ｃが形成される。前記軸筒２の後端（即ち後軸２２の後端）には、第１の実施の形態と同様、前記開口部２２ｃを開閉自在にする蓋部６が設けられる。前記蓋部６は、第１の実施の形態と同様、ヒンジ部６３に回動自在に取り付けられる。前記蓋部６の前面には、第１の実施の形態と同様、当接壁部６１が形成され、前記当接壁部６１に、没入状態の筆記体７の後端に連結された各々の操作体８の後端が当接される。 (Cover)
As in the first embodiment, the rear end of each window hole 22a is formed with an opening 22c that is opened rearwardly from the rear end of the shaft tube 2. At the rear end of the shaft cylinder 2 (that is, the rear end of the rear shaft 22), a lid portion 6 that allows the opening 22c to be opened and closed is provided as in the first embodiment. The lid portion 6 is rotatably attached to the hinge portion 63 as in the first embodiment. As in the first embodiment, a contact wall portion 61 is formed on the front surface of the lid portion 6, and each of the contact wall portions 61 connected to the rear end of the writing body 7 in an immersive state. The rear end of the operating body 8 is brought into contact.

前記蓋部６の前面には、第１の実施の形態と同様、係合部６２（具体的には係合孔）が設けられ、前記後軸２２の後端には、前記係合部６２と係合可能な被係合部２２ｄ（具体的には係合突起）が設けられる。第１の実施の形態と同様、前記係合部６２と前記被係合部２２ｄとは、蓋部６が開口部２２ｃを閉鎖した際、互いに係合状態にあり、弾発体９の後方への付勢による操作体８と蓋部６前面の当接壁部６１との当接では、その係合状態は解除されず、蓋部６が開くことはない。本実施の形態の筆記体７及び操作体８の交換作業は、第１の実施の形態と同様であるため、説明を省略する。 As in the first embodiment, an engagement portion 62 (specifically, an engagement hole) is provided on the front surface of the lid portion 6, and the engagement portion 62 is provided at the rear end of the rear shaft 22. An engaged portion 22d (specifically, an engaging protrusion) that can be engaged is provided. As in the first embodiment, the engaging portion 62 and the engaged portion 22d are in an engaged state when the lid portion 6 closes the opening portion 22c, and the rearward direction of the projectile body 9. In the contact between the operating body 8 and the contact wall 61 on the front surface of the lid 6 by the urging force, the engaged state is not released and the lid 6 does not open. Since the replacement work of the writing body 7 and the operation body 8 of the present embodiment is the same as that of the first embodiment, description thereof is omitted.

（弾発体支持体）
軸筒２の内壁（即ち前軸２１の後端開口部内壁及び後軸２２の前端開口部内壁）には、円筒状の弾発体支持体３が固着される。図２３及び図２４に示すように、前記弾発体支持体３は、筆記体７が挿通される複数（具体的には５個）の内孔３１が軸方向に貫設されている。前記弾発体支持体３の後面と、各々の操作体８の鍔部８５の前面との間には、弾発体９が配置される。前記各々の弾発体９の内部に筆記体７が遊挿される。前記各々の弾発体９の前端は弾発体支持体３の後面により係止され、前記各々の弾発体９の後端は操作体８の鍔部８５の前面に係止される。前記弾発体支持体３は、合成樹脂の射出成形から得られる。 (Bullet support)
A cylindrical projectile support 3 is fixed to the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear end opening of the front shaft 21 and the inner wall of the front end opening of the rear shaft 22). As shown in FIGS. 23 and 24, the bullet support body 3 has a plurality of (specifically, five) inner holes 31 through which the writing body 7 is inserted in the axial direction. A bullet body 9 is disposed between the rear surface of the bullet body support 3 and the front surface of the collar portion 85 of each operation body 8. A writing body 7 is loosely inserted into each of the bullets 9. The front end of each of the projectiles 9 is locked by the rear surface of the projectile support 3, and the rear end of each of the projectile bodies 9 is locked to the front surface of the collar portion 85 of the operation body 8. The projectile support 3 is obtained by injection molding of synthetic resin.

（軸部）
前記弾発体支持体３の後端面の軸心には、軸方向に延びる棒状の軸部４が後方に突設される。前記軸部４は、弾発体支持体３の後端面の軸心に一体に形成される。そのため、前記軸部４は、弾発体支持体３と同じ材料の合成樹脂からなる。前記軸部４は、径方向に撓み変形可能（即ち径方向に弾性変形可能）である。前記軸部４の後端部は、軸部４自体の撓み変形により径方向に変位可能である。 (Shaft)
A rod-shaped shaft portion 4 extending in the axial direction is provided at the rear of the shaft center of the rear end surface of the projectile support 3 so as to protrude rearward. The shaft portion 4 is integrally formed with the shaft center of the rear end surface of the elastic body support 3. Therefore, the shaft portion 4 is made of a synthetic resin made of the same material as the elastic body support 3. The shaft portion 4 can be bent and deformed in the radial direction (that is, elastically deformable in the radial direction). The rear end portion of the shaft portion 4 can be displaced in the radial direction by the bending deformation of the shaft portion 4 itself.

（可動部）
前記軸部４の後端部には、可動部５が一体に形成される。前記可動部５は、係止壁部２２ｂの前端より前方に配置される。前記可動部５が、軸方向に延びる複数本（５本）の突条５１と、前記隣り合う突条５１と突条５１の間に形成された軸方向に延びる複数本（５本）の溝５２とを備える。前記各々の溝５２に、各々の筆記体７の操作体８の解除突起８２（第１の解除突起８２ａ及び第２の解除突起８２ｂ）が摺動可能に構成される。前記各々の突条５１は、円周方向に７２度回転した位置に等間隔に配置される。前記各々の溝５２は、円周方向に７２度回転した位置に等間隔に配置される。 (movable part)
A movable portion 5 is integrally formed at the rear end portion of the shaft portion 4. The movable portion 5 is disposed in front of the front end of the locking wall portion 22b. The movable portion 5 includes a plurality of (five) protrusions 51 extending in the axial direction, and a plurality of (five) grooves extending between the adjacent protrusions 51 and the protrusions 51 extending in the axial direction. 52. In each of the grooves 52, a release protrusion 82 (a first release protrusion 82a and a second release protrusion 82b) of the operation body 8 of each writing body 7 is configured to be slidable. The respective protrusions 51 are arranged at equal intervals at positions rotated 72 degrees in the circumferential direction. The grooves 52 are arranged at equal intervals at positions rotated 72 degrees in the circumferential direction.

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でもよい。また、ボールペンチップは、インキ収容管７２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７２の前端開口部に固着される。 Further, the ballpoint pen tip may be configured such that a ball held rotatably at the front end is urged forward by a projectile 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 of the ink containing tube 72 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 72 via the pen tip holder.

（ペン先の出没作動）
本実施の形態におけるペン先７１の出没作動について説明する。 (Intrusion operation of the nib)
A description will be given of the operation of moving the pen tip 71 in the present embodiment.

図２１及び図２２に、ペン先突出状態の可動部５を示す。
一つの筆記体７のペン先７１が突出状態を解除するには、他の４本のいずれか一つのペン先没入状態の筆記体７を前方に押圧操作する。
一つの筆記体７のペン先７１が突出状態のとき、ペン先突出状態の筆記体７の後端の操作体８の第１の解除突起８２ａにより可動部５が軸筒２の軸心から径方向に押圧変位されている。そのため、他のペン先没入状態の筆記体７の後端の操作体８を前方に押圧操作すると、前記押圧操作した操作体８の第２の解除突起８２ｂの前面の各々が、各々の溝５２の後端開口縁の傾斜面５３に摺接する。それにより、可動部５が軸筒２の径方向に押圧変位され、可動部５が軸筒２の軸心に位置されるとともに、前記可動部５が、先にペン先突出状態にある筆記体７の後端に連結された操作体８を径方向外方に押し上げ、それにより、ペン先突出状態にある筆記体７後端に設けた操作体８と係止壁部２２ｂとの係止状態が解除される。前記押圧操作した他の筆記体７のペン先７１を突出させるには、さらに、押圧操作を続け、前記押圧操作した他の筆記体７後端に設けた操作体８が係止壁部２２ｂに係止され、前記押圧操作した筆記体７のペン先７１が突出状態となる。 21 and 22 show the movable part 5 in a pen tip protruding state.
In order to cancel the pen tip 71 of one cursive body 7, one of the other four pen-immersed cursive bodies 7 is pushed forward.
When the pen point 71 of one writing body 7 is in the protruding state, the movable portion 5 is changed from the axis of the shaft tube 2 by the first release protrusion 82a of the operating body 8 at the rear end of the writing body 7 in the protruding state of the pen point. The pressure is displaced in the direction. Therefore, when the operation body 8 at the rear end of the other pendant-immersed writing body 7 is pressed forward, each of the front surfaces of the second release protrusions 82b of the operated operation body 8 that has been pressed operates. Slidably contacts the inclined surface 53 of the rear end opening edge. Thereby, the movable part 5 is pressed and displaced in the radial direction of the shaft cylinder 2, the movable part 5 is positioned at the axial center of the shaft cylinder 2, and the movable part 5 is in a pen tip protruding state first. The operating body 8 connected to the rear end of the actuator 7 is pushed outward in the radial direction, whereby the operating body 8 provided at the rear end of the writing body 7 in the pen tip protruding state and the locking wall portion 22b are locked. Is released. In order to project the pen point 71 of the other pressed body 7 that has been pressed, the pressing operation is further continued, and the operating body 8 provided at the rear end of the other pressed body 7 is moved to the locking wall portion 22b. The pen tip 71 of the cursive body 7 that is locked and pressed is in a protruding state.

本発明の第１の実施の形態の全ペン先没入時の正面図である。It is a front view at the time of all the nibs immersion of the 1st Embodiment of this invention. 図１の縦断面図である。It is a longitudinal cross-sectional view of FIG. 図２の要部拡大縦断面図である。FIG. 3 is an enlarged vertical sectional view of a main part of FIG. 2. 図３のＡ−Ａ線断面図である。FIG. 4 is a sectional view taken along line AA in FIG. 3. 第１の実施の形態のペン先突出時の縦断面図である。It is a longitudinal cross-sectional view at the time of pen point protrusion of 1st Embodiment. 図５の要部拡大縦断面図である。FIG. 6 is an enlarged vertical sectional view of a main part of FIG. 5. 図６の斜視図である。FIG. 7 is a perspective view of FIG. 6. 図６のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 第１の実施の形態の解除操作１を説明する斜視図である。It is a perspective view explaining release operation 1 of a 1st embodiment. 図９の要部拡大斜視図である。It is a principal part expansion perspective view of FIG. 第１の実施の形態の解除操作２を説明する斜視図である。It is a perspective view explaining release operation 2 of a 1st embodiment. 第１の実施の形態の弾発体支持体の斜視図である。It is a perspective view of the bullet support body of a 1st embodiment. 図１０の可動部の拡大斜視図である。It is an expansion perspective view of the movable part of FIG. 第１の実施の形態の蓋部開口時の斜視図である。It is a perspective view at the time of the cover part opening of 1st Embodiment. 図１４の要部拡大斜視図である。It is a principal part expansion perspective view of FIG. 本発明の第２の実施の形態の全ペン先没入時の正面図である。It is a front view at the time of all the nibs immersion of the 2nd Embodiment of this invention. 図１６の縦断面図である。It is a longitudinal cross-sectional view of FIG. 図１７の要部拡大縦断面図である。FIG. 18 is an enlarged vertical sectional view of a main part of FIG. 17. 図１８のＣ−Ｃ線断面図である。It is CC sectional view taken on the line of FIG. 第２の実施の形態のペン先突出時の縦断面図である。It is a longitudinal cross-sectional view at the time of pen point protrusion of 2nd Embodiment. 図２０の要部拡大縦断面図である。It is a principal part expanded longitudinal cross-sectional view of FIG. 図２１のＤ−Ｄ線断面図である。It is the DD sectional view taken on the line of FIG. 第２の実施の形態の弾発体支持体の斜視図である。It is a perspective view of the elastic body support body of 2nd Embodiment. 図２３の可動部の拡大斜視図である。It is an expansion perspective view of the movable part of FIG. 第２実施の形態の全ペン先没入時の要部縦断面斜視図である。It is a principal part longitudinal cross-sectional perspective view at the time of all the nib immersion of 2nd Embodiment. 第２実施の形態のペン先突出時の要部縦断面斜視図である。It is a principal part longitudinal cross-sectional perspective view at the time of pen tip protrusion of 2nd Embodiment.

Explanation of symbols

１多芯筆記具
２軸筒
２１前軸
２１ａ前端孔
２２後軸
２２ａ窓孔
２２ｂ係止壁部
２２ｃ開口部
２２ｄ被係合部
２２ｅクリップ
３弾発体支持体
３１内孔
３２保持部
３３隔壁
４軸部
５可動部
５１突条
５２溝
５３傾斜面
６蓋部
６１当接壁部
６２係合部
６３ヒンジ部
７筆記体
７１ペン先
７２インキ収容管
８操作体
８１操作部
８２解除突起
８２ａ第１の解除突起
８２ｂ第２の解除突起
８２ｃ傾斜面
８４嵌入部
８５鍔部
８６係止突起
９弾発体 DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 21 Front shaft 21a Front end hole 22 Rear shaft 22a Window hole 22b Locking wall part 22c Opening part 22d Engagement part 22e Clip 3 Ejector support body 31 Inner hole 32 Holding part 33 Bulkhead 4 Axis Part 5 Movable part 51 Projection line 52 Groove 53 Inclined surface 6 Lid part 61 Contact wall part 62 Engagement part 63 Hinge part 7 Writing body 71 Pen tip 72 Ink storage tube 8 Operation body 81 Operation part 82 Release protrusion 82a 1st Release projection 82b Second release projection 82c Inclined surface 84 Insertion portion 85 Gutter portion 86 Locking projection 9 Ejection body

Claims

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, each of the writing bodies is urged rearward by a projectile, and an operating body is connected to a rear end of each of the writing bodies, A plurality of window holes extending in the front-rear direction are provided in the side wall of the shaft cylinder in the radial direction so that each operation body protrudes radially outward from each window hole, and one operation body extends along the window hole. By sliding it forward, the pen tip of the cursive body connected to the one operating body is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that was in the projecting state first is projected onto the shaft cylinder. Each of the operating bodies includes an operating portion that protrudes radially outward from the window hole of the shaft tube, and a release protrusion that is positioned on the opposite side of the operating portion in the radial direction. The inner wall of the cylinder is provided with a locking wall portion for locking the operating body connected to the rear end of the writing body in the pen tip protruding state. A core writing instrument,
A movable part that is restricted from moving rearwardly and that can be displaced in the radial direction is disposed on the shaft center inside the shaft tube,
The movable portion includes a plurality of protrusions extending in the axial direction, and a plurality of grooves extending in the axial direction formed between the adjacent protrusions and the protrusions,
In each of the grooves, a release protrusion of an operation body connected to each writing body is configured to be slidable,
When the pen point of one writing body is in a protruding state from the front end hole, the operating body connected to the rear end of the writing body in the protruding state of the pen point is locked to the locking wall portion, and The release projection of the operating body connected to the rear end of the pen-projected writing body is configured to press and displace the movable part in the radial direction.
When the operating body connected to the rear end of the other writing body in the pen tip protruding state is slid forward in the pen tip protruding state, the operating body connected to the rear end of the other writing body is released. An operating body in which the movable portion is pressed and displaced in the radial direction when the projection is in sliding contact with the opening edge of the rear end of the groove, and the movable portion is connected to the rear end of the writing body that is in the pen tip protruding state first. A multi-core writing instrument, wherein the locking state between the operating body connected to the rear end of the writing body in the pen tip protruding state and the locking wall portion is released. .

A shaft portion extending in the axial direction and deformable in the radial direction is provided at the shaft center of the shaft cylinder,
One end of the shaft portion is fixed to the inner wall of the shaft tube, and the other end of the shaft portion is provided to be displaceable in the radial direction,
The multi-core writing instrument according to claim 1, wherein the movable portion is provided at an end portion of the shaft portion that is displaceable in the radial direction.

The multi-core writing instrument according to claim 1 or 2, wherein an inclined surface is provided at a rear end opening edge of each groove.

The multi-core writing instrument according to any one of claims 1 to 3, wherein an inclined surface is provided on a front surface of a release protrusion that is in sliding contact with a rear end opening edge of each groove.

On the inner wall of the shaft cylinder, a projectile support that supports the projectile that urges each of the writing bodies rearward and has an inner hole through which each of the writing bodies can be inserted is fixed. The shaft portion is formed integrally with the rear end axis of the projectile support body, the shaft portion protrudes rearward from the rear end of the elastic body support body, and the movable portion is disposed at the rear end portion of the shaft portion. The multi-core writing instrument according to any one of claims 1 to 4, which is integrally formed.

The writing body can be taken out from the shaft cylinder and inserted into the shaft cylinder in a state where the operating body is connected to the rear end of the writing body, and four or more writing bodies are accommodated in the shaft cylinder. The multi-core writing instrument according to any one of 1 to 5.