JP5022260B2 - Writing instrument - Google Patents

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JP5022260B2
JP5022260B2 JP2008025543A JP2008025543A JP5022260B2 JP 5022260 B2 JP5022260 B2 JP 5022260B2 JP 2008025543 A JP2008025543 A JP 2008025543A JP 2008025543 A JP2008025543 A JP 2008025543A JP 5022260 B2 JP5022260 B2 JP 5022260B2
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shaft
grip portion
grip
flat surface
writing instrument
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JP2009184198A (en
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吉敏 相沢
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Zebra Co Ltd
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Zebra Co Ltd
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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
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Description

本発明は、指の滑り止めとして利用されるグリップ部が設けられた筆記具に関するものである。   The present invention relates to a writing instrument provided with a grip portion used as a slip stopper for fingers.

従来、このような分野の技術として、特開2005−47219号公報がある。この公報に記載された筆記具には、握り部分にグリップ部が設けられており、このグリップ部によって指の滑りを止めたり、指に対する密着性を高めている。このことは、筆記具の使用感を向上させ、長時間の筆記作業の疲労感をも低減させている。弾性体からなるグリップ部の材質としては、指で押しても変形し難いものや、指で変形し易いものまで様々である。   Conventionally, there is JP-A-2005-47219 as a technology in such a field. The writing instrument described in this publication is provided with a grip portion at a grip portion, and the grip portion prevents slipping of the finger or improves adhesion to the finger. This improves the feeling of use of the writing instrument, and also reduces the fatigue of writing work for a long time. There are various materials for the grip portion made of an elastic body, such as materials that are difficult to deform even when pressed with a finger, and materials that are easily deformed with a finger.

特開2005−47219号公報JP-A-2005-47219

握り部分に利用されるグリップ部が、弾性変形し難い材料から形成されている場合は、指の接触によって、グリップの先端のめくれ上がりや後退が起き難い。しかしながら、グリップ部が、弾性変形し易い軟質材から形成されている場合、指の接触によって、グリップの先端のめくれ上がりや後退が起き易く、このような事態が頻繁に起きると、グリップ部の先端が元に戻らず、グリップ部の外観や握り感を損失させてしまうといった問題点があった。   When the grip portion used for the grip portion is formed of a material that is not easily elastically deformed, the tip of the grip is unlikely to turn up or retract due to contact with the finger. However, when the grip part is formed of a soft material that is easily elastically deformed, the tip of the grip is likely to be turned up or down due to the contact of the finger. However, there was a problem that the appearance and grip feeling of the grip portion were lost.

本発明は、グリップ部の先端のめくれ上がり現象、グリップ部の先端の後退現象を起き難くした筆記具を提供することを目的とする。   It is an object of the present invention to provide a writing instrument that makes it difficult for the grip portion to be turned up and the grip portion to be retracted.

本発明に係る筆記具は、軸筒の外周に、弾性体からなる筒状のグリップ部が装着されてなる筆記具において、
グリップ部の先端側には、軸筒の軸線方向に突出する突片が設けられ、軸筒の先端側の外周面には、突片が載置される平坦面が形成され、突片は、軸筒の先端部を覆うように装着された先口部材の内側まで延在していることを特徴とする。
The writing instrument according to the present invention is a writing instrument in which a cylindrical grip portion made of an elastic body is attached to the outer periphery of the shaft cylinder.
On the distal end side of the grip portion, a projecting piece protruding in the axial direction of the shaft cylinder is provided, and on the outer peripheral surface on the distal end side of the shaft cylinder, a flat surface on which the projecting piece is placed is formed. It extends to the inside of the tip member attached so as to cover the tip of the shaft tube.

この筆記具においては、グリップ部の先端側に設けられた突片を、先口部材の内側まで延在させているので、指の引っ掛かりによって引き起こされるグリップ部の先端のめくれ上がり現象やグリップ部の後退現象が起き難くなる。このような現象は、グリップ部に弾性変形し易い軟質材が利用される場合に特に起き易いので、このような材質からなるグリップ部をもった筆記具には特に効果的である。   In this writing instrument, the protruding piece provided on the tip side of the grip part extends to the inside of the tip member, so that the grip part tip-up phenomenon caused by finger catching and the grip part retreat The phenomenon is less likely to occur. Such a phenomenon is particularly likely to occur when a soft material that is easily elastically deformed is used for the grip portion, and is particularly effective for a writing instrument having a grip portion made of such a material.

また、平坦面は、軸筒の外周面において、グリップ部に対応する位置まで軸線方向に延長されると共に、軸筒の周方向に等間隔で配置されていると好適である。
平坦面を、グリップ部に対応する位置まで延長させることで、グリップ部の裏面側にも平坦面が延在することになるので、平坦面の延長部分におけるグリップ部の肉厚を、隣接する平坦面の延長部分の間におけるグリップ部の肉厚より厚くすることができる。これにより、グリップ部の周方向において、グリップ部の握りの感触を変化させることができる。
Further, it is preferable that the flat surface is extended in the axial direction to the position corresponding to the grip portion on the outer peripheral surface of the shaft tube and is arranged at equal intervals in the circumferential direction of the shaft tube.
By extending the flat surface to a position corresponding to the grip portion, the flat surface also extends on the back surface side of the grip portion. Therefore, the thickness of the grip portion in the extended portion of the flat surface is set to the adjacent flat surface. It can be made thicker than the thickness of the grip portion between the extended portions of the surface. Thereby, the grip feeling of a grip part can be changed in the circumferential direction of a grip part.

また、二色成形によって、軸筒とグリップ部とを一体的に形成すると好適である。
このような構成を採用すると、軸筒とグリップ部との接着性や、軸部の平坦面と突片との接着性が向上し、弾性変形し易い軟質材でグリップ部を形成している場合であっても、グリップ部の先端のめくれ上がりやグリップ部の後退が起き難いといった優れた効果が発揮される。
In addition, it is preferable that the shaft tube and the grip portion are integrally formed by two-color molding.
When such a configuration is adopted, the adhesiveness between the shaft tube and the grip part and the adhesiveness between the flat surface of the shaft part and the protruding piece are improved, and the grip part is formed of a soft material that is easily elastically deformed. Even so, an excellent effect is exhibited such that the tip of the grip part is not turned up and the grip part is difficult to retract.

また、突片は、先口部材によって軸筒の平坦面に押し付けられていると好適である。
この場合、指の引っ掛かりによって引き起こされるグリップ部の先端のめくれ上がり現象やグリップ部の後退現象が更に起き難くなり、突片の弾性変形に起因して、軸筒から先口部材が抜け難くなる。
Further, it is preferable that the projecting piece is pressed against the flat surface of the shaft tube by the tip member.
In this case, the phenomenon that the tip of the grip portion is turned up and the grip portion is retracted more easily caused by the finger catching is less likely to occur, and the leading end member is less likely to be removed from the shaft tube due to the elastic deformation of the protruding piece.

本発明によれば、グリップ部の先端のめくれ上がり現象やグリップ部の先端の後退現象が起き難くなる。   According to the present invention, the phenomenon of turning up the tip of the grip part and the phenomenon of retracting the tip of the grip part are less likely to occur.

以下、図面を参照しつつ本発明に係る筆記具の好適な実施形態について詳細に説明する。なお、ペン先側を「前方側」として以下説明する。   Hereinafter, preferred embodiments of a writing instrument according to the present invention will be described in detail with reference to the drawings. In the following description, the pen tip side is referred to as “front side”.

[実施形態1]
図1に示すように、回転式多芯筆記具1は、前軸2aと後軸2bとからなる軸筒2を有し、前軸2aには、表面をメッキ処理した略円錐状の先口部材19が装着され、後軸2bにはクリップ2cが一体に形成され、前軸2aと後軸2bとは相対的に回転する。さらに、軸筒2の前軸2aの外周には、弾性体からなる筒状のグリップ部3が装着されている。このグリップ部3は、弾性変形し易い軟質材(例えば熱可塑性エラストマー(TPE))からなり、二色成形によって、前軸2aとグリップ部3は一体的に形成されている。
[Embodiment 1]
As shown in FIG. 1, the rotary multi-core writing instrument 1 has a shaft cylinder 2 composed of a front shaft 2a and a rear shaft 2b, and the front shaft 2a has a substantially conical tip member whose surface is plated. 19, a clip 2c is formed integrally with the rear shaft 2b, and the front shaft 2a and the rear shaft 2b rotate relatively. Further, a cylindrical grip portion 3 made of an elastic body is mounted on the outer periphery of the front shaft 2 a of the shaft tube 2. The grip portion 3 is made of a soft material that is easily elastically deformed (for example, thermoplastic elastomer (TPE)), and the front shaft 2a and the grip portion 3 are integrally formed by two-color molding.

軸筒2内には、2本のボールペン型リフィール(例えば、赤、黒のインクが入ったリフィール)4aとシャープペンシル型リフィール4bとが収容されている。各リフィール4a,4bは、軸筒2内に収容された中駒6によって支持され、この中駒6は、前軸2aに対して回転しないように連結されると共に、後軸2bに対して回転するように連結されている。   The shaft cylinder 2 accommodates two ballpoint pen type refills (for example, a refill containing red and black ink) 4a and a mechanical pencil type refill 4b. Each of the refills 4a and 4b is supported by a middle piece 6 accommodated in the shaft cylinder 2, and the middle piece 6 is connected so as not to rotate with respect to the front shaft 2a and rotates with respect to the rear shaft 2b. To be connected.

さらに、中駒6には、各リフィール4a,4bが差し込まれる3個の挿入孔6aと、各挿入孔6aから後方に向かって軸線L方向に延在するガイド溝6bとが形成されている。各ガイド溝6b内では、各リフィール4a,4bの後端に固定されたスライド駒7が摺動する。そして、各ガイド溝6b内には、リフィール4a,4bに巻回された圧縮バネ8が装填され、圧縮バネ8の一端は中駒6によって支持され、圧縮バネ8の他端はスライド駒7によって支持されている。   Further, the middle piece 6 is formed with three insertion holes 6a into which the refills 4a and 4b are inserted, and guide grooves 6b extending rearward from the insertion holes 6a in the direction of the axis L. In each guide groove 6b, the slide piece 7 fixed to the rear end of each refill 4a, 4b slides. Each guide groove 6b is loaded with a compression spring 8 wound around the refills 4a and 4b. One end of the compression spring 8 is supported by the middle piece 6, and the other end of the compression spring 8 is provided by the slide piece 7. It is supported.

さらに、中駒6の後端には、筒状の駆動カム9を回転自在に支持する支軸部6cが形成されている。支軸部6cを中心に後軸2bと一緒に回転する駆動カム9は、内側で支軸部6cに回転自在に連結される円筒状の基部10と、この基部10の後端から突出して消しゴム13が装填されると共に、キャップ5を保持する消しゴム収容部11と、基部10の前端から軸筒2の先端側に向けて突出するカム本体部12とからなる。このカム本体部12は、基部10の端から爪状に突出すると共に、円筒を斜めに切断した形状をなし、カム本体部12の輪郭に沿って山形のカム面12aが形成されている。   Further, a support shaft portion 6 c that rotatably supports the cylindrical drive cam 9 is formed at the rear end of the middle piece 6. The drive cam 9 that rotates together with the rear shaft 2b around the support shaft portion 6c includes a cylindrical base portion 10 that is rotatably connected to the support shaft portion 6c inside, and an eraser that protrudes from the rear end of the base portion 10. 13 includes an eraser accommodating portion 11 that holds the cap 5, and a cam main body portion 12 that protrudes from the front end of the base portion 10 toward the distal end side of the shaft tube 2. The cam body 12 projects in a claw shape from the end of the base 10 and has a shape obtained by obliquely cutting a cylinder, and a chevron cam surface 12 a is formed along the contour of the cam body 12.

これに対して、圧縮バネ8の付勢力によって駆動カム9の従動部材として機能する各スライド駒7は、ガイド溝6b内を摺動する摺動部15と、摺動部15から突出してリフィール4a,4bの後端に差し込まれるピン状のリフィール装填部16と、摺動部15に一体に形成されると共に、三角形状をなす従動部17とからなる。従動部17には、駆動カム9のカム面12aに沿って摺動するV字状の従動面17aが形成され、三角形状のカム本体部12の先端には、従動部17の頂部が入り込んで従動部17を係止させるための凹部が形成されている。従って、後軸2bと一緒に駆動カム9が回転すると、カム本体部12の凹部内にスライド駒7の頂部の何れかが選択的に入り込むので、後軸2bの回転によって、リフィール4a,4bの先端の何れかを軸筒2の先端から突出させることができる。   On the other hand, each slide piece 7 which functions as a driven member of the drive cam 9 by the urging force of the compression spring 8 protrudes from the slide portion 15 sliding inside the guide groove 6b and the refill 4a. , 4b includes a pin-shaped refill loading portion 16 that is inserted into the rear end and a driven portion 17 that is formed integrally with the sliding portion 15 and has a triangular shape. The driven portion 17 is formed with a V-shaped driven surface 17 a that slides along the cam surface 12 a of the drive cam 9, and the top of the driven portion 17 enters the tip of the triangular cam body portion 12. A recess for locking the driven portion 17 is formed. Accordingly, when the drive cam 9 rotates together with the rear shaft 2b, any one of the tops of the slide pieces 7 selectively enters into the recesses of the cam main body 12, so that the refills 4a and 4b are rotated by the rotation of the rear shaft 2b. Any one of the tips can be projected from the tip of the shaft tube 2.

このような回転式多芯筆記具1において、軸筒2の前軸2aの外周に装着されたグリップ部3は、弾性変形し易い軟質材(例えば熱可塑性エラストマー(TPE))からなり、二色成形によって、前軸2aとグリップ部3は一体的に形成されている。その結果、互いの接着性が向上するので、前軸2aに対してグリップ部3が剥がれ難くなる。   In such a rotary multi-core writing instrument 1, the grip portion 3 attached to the outer periphery of the front shaft 2a of the shaft tube 2 is made of a soft material (for example, a thermoplastic elastomer (TPE)) that is easily elastically deformed, and is two-color molded. Thus, the front shaft 2a and the grip portion 3 are integrally formed. As a result, since the mutual adhesiveness is improved, the grip portion 3 is difficult to peel off from the front shaft 2a.

図2及び図3に示すように、軸筒2の前軸2aは、グリップ部3が装着される円筒状の前軸本体部20と、後軸2b内に装填されて、後軸2bに対して回転自在に連結されると共に、中駒6に対して回転しないように連結される円筒状の連結部21と、金属製の装飾リング18(図1参照)を装着させるために、連結部21と前軸本体部20との間に形成されたリング装着部22と、金属メッキされた略円錐状の先口部材19の内方に位置して、前軸本体部20の前端から突出する略円錐状の拡張部23とから構成されている。   As shown in FIGS. 2 and 3, the front shaft 2 a of the shaft cylinder 2 is loaded into the cylindrical front shaft main body portion 20 to which the grip portion 3 is attached and the rear shaft 2 b, so as to be opposed to the rear shaft 2 b. In order to attach a cylindrical connecting portion 21 that is rotatably connected to the middle piece 6 so as not to rotate, and a metallic decorative ring 18 (see FIG. 1), the connecting portion 21 is attached. The ring mounting portion 22 formed between the front shaft main body portion 20 and the metal-plated substantially conical tip member 19 are located inwardly and protrude from the front end of the front shaft main body portion 20. It is comprised from the conical expansion part 23. FIG.

軸筒2の先端部すなわち前軸2aの拡張部23の外周面には、軸線L方向に延在する平坦面Sが形成され、グリップ部3の先端側には、先口部材19の内側まで軸線L方向に延在する突片3aが一体的に設けられ、平坦面S上に突片3aが二色成形によって接着されている。二色成形によって、平坦面Sと突片3aとの接着性が向上するので、前軸2aの平坦面Sに対してグリップ部3の突片3aが剥がれ難くなっている。   A flat surface S extending in the direction of the axis L is formed on the outer peripheral surface of the extended portion 23 of the front shaft 2a, that is, the front end portion of the front shaft 2a. A protruding piece 3a extending in the direction of the axis L is integrally provided, and the protruding piece 3a is bonded on the flat surface S by two-color molding. Since the adhesion between the flat surface S and the projecting piece 3a is improved by the two-color molding, the projecting piece 3a of the grip portion 3 is hardly peeled off from the flat surface S of the front shaft 2a.

なお、成形時に関して、一次側のゲートを平坦面Sの略中央に設け、二次側のゲートを突片3aの略中央に設けることが好ましい。製品に関して、これらゲートの成形跡G1,G2は、先口部材19によって隠すことができるので外観が良好になる。また、先口部材19の内周面19aの後端部に設けられたリング状の凸部19b(図1参照)は、突片3aに接触していない。   Regarding the molding, it is preferable that the primary side gate is provided in the approximate center of the flat surface S and the secondary side gate is provided in the approximate center of the protruding piece 3a. Regarding the product, the molding marks G1 and G2 of the gate can be hidden by the tip member 19, so that the appearance is improved. Moreover, the ring-shaped convex part 19b (refer FIG. 1) provided in the rear-end part of the internal peripheral surface 19a of the front-end | tip member 19 is not contacting the protrusion 3a.

さらに、前軸2aの拡張部23及び突片3aを覆うように先口部材19が装着され、突片3aは平坦面Sに接着させられている。その結果、指の引っ掛かりによって引き起こされるグリップ部3の先端3bのめくれ上がり現象やグリップ部3の先端3bの後退現象が起き難くなる。このような現象は、グリップ部3に弾性変形し易い軟質材(例えば熱可塑性エラストマー(TPE))が利用される場合に特に起き易いので、このような材質のグリップ部3をもった筆記具には特に効果的である。   Further, a tip member 19 is attached so as to cover the extended portion 23 of the front shaft 2a and the protruding piece 3a, and the protruding piece 3a is bonded to the flat surface S. As a result, the phenomenon that the tip 3b of the grip portion 3 is turned up and the phenomenon that the tip 3b of the grip portion 3 is retracted is less likely to occur due to finger catching. Such a phenomenon is particularly likely to occur when a soft material (for example, thermoplastic elastomer (TPE)) that is easily elastically deformed is used for the grip portion 3, so that the writing instrument having the grip portion 3 of such a material is used. It is particularly effective.

[実施形態2]
実施形態2に係る回転式多芯筆記具は、実施形態1と比較して前軸及びグリップ部の形状のみ相違し、実施形態1と同一の構成部分には同一符号を付し、その説明を省略する。
[Embodiment 2]
The rotary multi-core writing instrument according to the second embodiment is different from the first embodiment only in the shape of the front shaft and the grip portion, and the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. To do.

図5に示すように、回転式多芯筆記具30において、軸筒32の前軸32aの外周に装着されたグリップ部33は、弾性変形し易い軟質材(例えば熱可塑性エラストマー(TPE))からなり、二色成形によって、前軸32aとグリップ部33は一体的に形成されている。その結果、互いの接着性が向上するので、前軸32aに対してグリップ部33が剥がれ難くなる。   As shown in FIG. 5, in the rotary multi-core writing instrument 30, the grip portion 33 mounted on the outer periphery of the front shaft 32a of the shaft tube 32 is made of a soft material (for example, thermoplastic elastomer (TPE)) that is easily elastically deformed. The front shaft 32a and the grip portion 33 are integrally formed by two-color molding. As a result, mutual adhesiveness is improved, so that the grip portion 33 is hardly peeled off from the front shaft 32a.

図6〜図9に示すように、軸筒32の前軸32aは、グリップ部33が装着される断面略6角形の筒からなる前軸本体部40と、後軸2b内に装填されて、後軸2bに対して回転自在に連結されると共に、中駒6に対して回転しないように連結される円筒状の連結部41と、金属製の装飾リング18(図5参照)を装着させるために、連結部41と前軸本体部40との間に形成されたリング装着部42と、金属メッキされた略円錐状の先口部材19の内方に位置して、前軸本体部40の前端から突出する略円錐状の拡張部43とから構成されている。   As shown in FIGS. 6 to 9, the front shaft 32 a of the shaft tube 32 is loaded in the front shaft main body portion 40 formed of a substantially hexagonal-shaped tube to which the grip portion 33 is mounted, and the rear shaft 2 b. In order to mount a cylindrical connecting portion 41 that is rotatably connected to the rear shaft 2b and that is connected so as not to rotate with respect to the middle piece 6, and a metallic decorative ring 18 (see FIG. 5). In addition, a ring mounting portion 42 formed between the connecting portion 41 and the front shaft main body portion 40 and a metal-plated substantially conical tip member 19 are positioned inward of the front shaft main body portion 40. It is comprised from the substantially cone-shaped expansion part 43 which protrudes from the front end.

軸筒32の先端部すなわち前軸32aの拡張部43の外周面には、軸線L方向に延在する平坦面S1が形成され、平坦面S1は、拡張部43の周方向で等間隔に3個配置され、グリップ部33の先端側には、軸線L方向に延在する3個の突片33aが一体的に設けられ、各平坦面S1上にそれぞれの突片33aが二色成形によって接着されている。二色成形によって、平坦面S1と突片33aとの接着性が向上するので、前軸32aの平坦面S1に対してグリップ部33の突片33aが剥がれ難くなっている。しかも、平坦面S1が周方向に等間隔で配置されているので、指の引っ掛かりによって引き起こされるグリップ部33の先端33bのめくれ上がり現象やグリップ部33の先端33bの後退現象が起き難くなっている。   A flat surface S1 extending in the direction of the axis L is formed on the distal end portion of the shaft cylinder 32, that is, the outer peripheral surface of the extended portion 43 of the front shaft 32a, and the flat surface S1 is 3 at regular intervals in the circumferential direction of the extended portion 43. The three protruding pieces 33a extending in the axis L direction are integrally provided on the tip end side of the grip portion 33, and the protruding pieces 33a are bonded to each flat surface S1 by two-color molding. Has been. Since the adhesiveness between the flat surface S1 and the protruding piece 33a is improved by the two-color molding, the protruding piece 33a of the grip portion 33 is hardly peeled off from the flat surface S1 of the front shaft 32a. In addition, since the flat surfaces S1 are arranged at equal intervals in the circumferential direction, it is difficult for the tip 33b of the grip 33 to be turned up and the tip 33b of the grip 33 to be retracted due to finger catching. .

さらに、前軸32aの拡張部43及び突片33aを覆うように先口部材19が装着され、突片33aは平坦面S1に接着させられている。その結果、指の引っ掛かりによって引き起こされるグリップ部33の先端33bのめくれ上がり現象やグリップ部33の先端33bの後退現象が一層起き難くなる。このような現象は、グリップ部33に弾性変形し易い軟質材(例えば熱可塑性エラストマー(TPE))が利用される場合に特に起き易いので、このような材質のグリップ部33をもった筆記具には特に効果的である。   Further, the tip member 19 is mounted so as to cover the extended portion 43 and the projecting piece 33a of the front shaft 32a, and the projecting piece 33a is adhered to the flat surface S1. As a result, the phenomenon that the tip 33b of the grip 33 is turned up and the phenomenon that the tip 33b of the grip 33 is retracted caused by finger catching is further less likely to occur. Such a phenomenon is particularly likely to occur when a soft material (for example, thermoplastic elastomer (TPE)) that is easily elastically deformed is used for the grip portion 33. Therefore, the writing instrument having the grip portion 33 of such a material is used. It is particularly effective.

さらに、前軸本体部40の外周面には、平坦面S1と連続して軸線L方向に延在する平坦面延長部S2が形成されている。平坦面S1は、平坦面延長部S2によって、グリップ部33に対応する位置まで軸線L方向に延長され、平坦面延長部S2は、グリップ部33の略全長に渡って延在している。   Further, a flat surface extension portion S2 extending in the direction of the axis L is formed on the outer peripheral surface of the front shaft main body portion 40 continuously with the flat surface S1. The flat surface S1 is extended in the direction of the axis L to a position corresponding to the grip portion 33 by the flat surface extension portion S2, and the flat surface extension portion S2 extends over substantially the entire length of the grip portion 33.

図9に示すように、断面円形のグリップ部33を適用した場合、平坦面延長部S2上におけるグリップ部33の肉厚W1を、平坦面延長部S2の間の円弧面Pにおけるグリップ部33の肉厚W2より厚くすることができる。これにより、グリップ部33の外径を大きくすることなく、グリップ部33の周方向において、グリップ部33の握りの感触を変化させることができる。   As shown in FIG. 9, when the grip portion 33 having a circular cross section is applied, the thickness W1 of the grip portion 33 on the flat surface extension portion S2 is set to be equal to that of the grip portion 33 on the arc surface P between the flat surface extension portions S2. It can be made thicker than the wall thickness W2. Thereby, the grip feeling of the grip part 33 can be changed in the circumferential direction of the grip part 33 without increasing the outer diameter of the grip part 33.

さらに、親指と人差し指と中指とでグリップ部33を握ることを考慮して、平坦面延長部S2を、前軸32aの周方向に等間隔で3個配置させ、更には、円弧面Pの曲率とグリップ部33の曲率を略同一して、この部分でグリップ33の握りの感触が変化しないようにする。このような形状の前軸32aを採用すると、グリップ部33を強く握る人は、各指を平坦面延長部S2の位置に置き、グリップ部33を軽く握る人は、各指を円弧面Pの位置に置くことで、利用者の好みに応じた最適な筆記が可能になる。   Further, considering that the grip portion 33 is gripped by the thumb, forefinger, and middle finger, three flat surface extensions S2 are arranged at equal intervals in the circumferential direction of the front shaft 32a, and the curvature of the arc surface P is further increased. And the curvature of the grip portion 33 are made substantially the same so that the grip feeling of the grip 33 does not change at this portion. When the front shaft 32a having such a shape is adopted, a person who grips the grip portion 33 strongly places each finger at the position of the flat surface extension portion S2, and a person who grips the grip portion 33 lightly holds each finger on the arc surface P. By placing it in the position, it becomes possible to write optimally according to the user's preference.

本発明は、前述した実施形態に限定されないことは言うまでもない。例えば、図10に示すように、他の実施形態に係る筆記具50にあっては、先口部材19の内周面19aの後端部に設けられたリング状の凸部19bによって、突片3aは平坦面Sに押し付けられている。この場合、指の引っ掛かりによって引き起こされるグリップ部3の先端のめくれ上がり現象やグリップ部3の後退現象が更に起き難くなり、突片3aの弾性変形に起因して、軸筒2から先口部材19が抜け難くなる。なお、第2実施形態についても同様の変更を行うことが可能である。また、本発明は、ノック式筆記具にも適用可能であり、単芯であっても多芯であっても適用可能である。   It goes without saying that the present invention is not limited to the embodiment described above. For example, as shown in FIG. 10, in the writing instrument 50 according to another embodiment, the projecting piece 3a is formed by the ring-shaped convex portion 19b provided at the rear end portion of the inner peripheral surface 19a of the tip member 19. Is pressed against the flat surface S. In this case, the phenomenon that the tip of the grip portion 3 is turned up and the grip portion 3 is retracted more easily caused by finger catching is less likely to occur. Is difficult to escape. Note that similar changes can be made in the second embodiment. The present invention can also be applied to a knock-type writing instrument, and can be applied to a single core or a multi-core.

本発明に係る筆記具の第1の実施形態を示す断面図である。It is sectional drawing which shows 1st Embodiment of the writing instrument which concerns on this invention. 第1の実施形態に適用される前軸を示す斜視図である。It is a perspective view which shows the front shaft applied to 1st Embodiment. 先口部材を前軸から外した状態を示す斜視図である。It is a perspective view which shows the state which removed the front-end | tip member from the front shaft. 図1のIV−IV線に沿う断面図である。It is sectional drawing which follows the IV-IV line of FIG. 本発明に係る筆記具の第2の実施形態を示す断面図である。It is sectional drawing which shows 2nd Embodiment of the writing instrument which concerns on this invention. 第2の実施形態に適用される前軸を示す斜視図である。It is a perspective view which shows the front axis | shaft applied to 2nd Embodiment. 先口部材を前軸から外した状態を示す斜視図である。It is a perspective view which shows the state which removed the front-end | tip member from the front shaft. 図5のVIII−VIII線に沿う断面図である。It is sectional drawing which follows the VIII-VIII line of FIG. 図5のIX−IX線に沿う断面図である。It is sectional drawing which follows the IX-IX line of FIG. 本発明に係る筆記具の他の実施形態を示す断面図である。It is sectional drawing which shows other embodiment of the writing instrument which concerns on this invention.

符号の説明Explanation of symbols

1,30,50…筆記具、2,32…軸筒、2a,32a…前軸、2b…後軸、3,33…グリップ部、3a,33a…突片、19…先口部材、23,43…拡張部(軸筒の先端部)、S,S1…平坦面、S2…平坦面延長部、L…軸線。   DESCRIPTION OF SYMBOLS 1,30,50 ... Writing instrument, 2,32 ... Shaft cylinder, 2a, 32a ... Front shaft, 2b ... Rear shaft, 3,33 ... Grip part, 3a, 33a ... Projection piece, 19 ... Front end member, 23, 43 ... extended portion (tip end portion of shaft barrel), S, S1 ... flat surface, S2 ... flat surface extension portion, L ... axis.

Claims (4)

軸筒の外周に、弾性体からなる筒状のグリップ部が装着されてなる筆記具において、
前記グリップ部の先端側には、前記軸筒の軸線方向に突出する突片が設けられ、
前記軸筒の先端側の外周面には、前記突片が載置される平坦面が形成され、
前記突片は、前記軸筒の先端部を覆うように装着された先口部材の内側まで延在していることを特徴とする筆記具。
In a writing instrument in which a cylindrical grip part made of an elastic body is attached to the outer periphery of the shaft cylinder,
On the tip side of the grip portion, a projecting piece protruding in the axial direction of the shaft cylinder is provided,
A flat surface on which the protruding piece is placed is formed on the outer peripheral surface on the tip side of the shaft tube,
The writing piece, wherein the protruding piece extends to the inside of a tip member attached so as to cover a tip end portion of the shaft tube.
前記平坦面は、前記軸筒の前記外周面において、前記グリップ部に対応する位置まで前記軸線方向に延長されると共に、前記軸筒の周方向に等間隔で配置されていることを特徴とする請求項1記載の筆記具。   The flat surface is extended in the axial direction to the position corresponding to the grip portion on the outer peripheral surface of the shaft tube, and is arranged at equal intervals in the circumferential direction of the shaft tube. The writing instrument according to claim 1. 二色成形によって、前記軸筒と前記グリップ部とを一体的に形成したことを特徴とする請求項1又は2記載の筆記具。   The writing instrument according to claim 1 or 2, wherein the shaft cylinder and the grip portion are integrally formed by two-color molding. 前記突片は、前記先口部材によって前記軸筒の前記平坦面に押し付けられていることを特徴とする請求項1〜3のいずれか一項に記載の筆記具。   The writing tool according to any one of claims 1 to 3, wherein the protruding piece is pressed against the flat surface of the shaft tube by the tip member.
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JP5115384B2 (en) * 2008-07-25 2013-01-09 ぺんてる株式会社 Shaft cylinder with grip and method of forming the cylinder
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JP6707375B2 (en) * 2016-03-22 2020-06-10 株式会社パイロットコーポレーション Writing instrument

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