JP2010082809A

JP2010082809A - Shaft tube for writing implement

Info

Publication number: JP2010082809A
Application number: JP2008250955A
Authority: JP
Inventors: Hitoshi Kobayashi; 均小林
Original assignee: Pilot Corp
Current assignee: Pilot Corp
Priority date: 2008-09-29
Filing date: 2008-09-29
Publication date: 2010-04-15

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft tube for a writing implement giving a comfortable gripping feeling, improving an anti-slipping effect and satisfactory in moldability. <P>SOLUTION: The shaft tube for the writing implement is formed by mounting a grip member formed of a soft material, to a grip part of a shaft tube body by two-color molding. The grip part is formed with a plurality of through-holes extending in an axis direction, at suitable spaces in a circumferential direction. The grip member is mounted to cover the through-holes, and recesses extending in the axis direction are formed in the outer surface of the grip member facing the through-holes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、軸筒本体の把持部に、軟質材からなるグリップ部材を二色成形によって装着してなる筆記具の軸筒に関する。 The present invention relates to a shaft tube of a writing instrument in which a grip member made of a soft material is attached to a grip portion of a shaft tube main body by two-color molding.

従来から、軸筒本体の把持部に、軟質材からなるグリップ部材を装着してなる筆記具の軸筒構造はよく知られている。 2. Description of the Related Art Conventionally, a shaft tube structure of a writing instrument in which a grip member made of a soft material is attached to a grip portion of a shaft tube body is well known.

こうした筆記具の軸筒において、把持感触の向上や長時間の筆記の疲れを抑制するため、軸筒本体の把持部にグリップ部材を装着してなる筆記具の軸筒もよく知られている。 In order to improve grip feeling and to prevent fatigue of writing for a long time in such an axial tube of a writing instrument, an axial tube of a writing instrument in which a grip member is attached to a gripping portion of an axial cylinder body is well known.

ところで、グリップ部材を握った時の把持感触を向上させる技術として、実開平７−１５３７３号号「軸体のグリップ」や実開平７−３７６８０号「軸体のグリップ装置」等で、軸筒の把持部とグリップ部材の内壁面とに空隙を設けることで、グリップ部材の変形量を多くすることが開示されている。 By the way, as a technique for improving the grip feeling when gripping the grip member, Japanese Utility Model Laid-Open No. 7-15373 “Shaft of Grip”, Japanese Utility Model 7-37680 “Grip Device of Shaft”, etc. It is disclosed that the amount of deformation of the grip member is increased by providing a gap between the grip portion and the inner wall surface of the grip member.

また、軟らかいフィット感を出す機能の向上を得るために、特開平１１−１３９０７０号「筆記具の軸」では、軸筒本体の把持部に、内部への貫通穴を形成し、この貫通孔を塞ぐようにグリップ部材を装着することで、貫通穴内部への変形を可能とした筆記具の軸筒が開示されている。
実開平７−１５３７３号公報実開平７−３７６８０号公報特開平１１−１３９０７０号公報 Further, in order to obtain an improved function for providing a soft fit, Japanese Patent Application Laid-Open No. 11-139070 “Shaft of writing instrument” forms a through-hole in the gripping portion of the shaft cylinder body and closes the through-hole. Thus, a shaft cylinder of a writing instrument that can be deformed into the through hole by mounting a grip member is disclosed.
Japanese Utility Model Publication No. 7-15373 Japanese Utility Model Publication No. 7-37680 Japanese Patent Laid-Open No. 11-139070

しかし、特許文献１、２は、軸筒の把持部とグリップ部材の内壁面とに空隙を設ける必要があり、グリップ部材の外径を大きくする、または、軸筒の把持部外径を小さくする等の構造上の制約が多いという問題があった。 However, in Patent Documents 1 and 2, it is necessary to provide a gap between the grip portion of the shaft tube and the inner wall surface of the grip member, and the outer diameter of the grip member is increased or the outer diameter of the grip portion of the shaft tube is decreased. There was a problem that there were many structural restrictions such as.

また、特許文献３は、内部への貫通穴を形成し、この貫通孔を塞ぐようにグリップ部材を装着するので、グリップ部材の肉厚量を厚くする必要があり、貫通孔を形成した部分でヒケが発生し易い等、成形性が悪いという問題があった。 Moreover, since patent document 3 forms the through-hole to an inside and mounts a grip member so that this through-hole may be plugged up, it is necessary to thicken the thickness of a grip member, and is a part which formed the through-hole. There was a problem that the moldability was poor, such as the occurrence of sink marks.

本発明の目的は、本発明者は上記問題を鑑み、グリップ部材の把持感触がよく、滑り止め効果が向上するとともに、成形性のよい筆記具の軸筒を提供することである。 In view of the above problems, an object of the present invention is to provide a writing tool shaft that has a good grip feeling of a grip member, an improved anti-slip effect, and a good moldability.

本発明は、軸筒本体の把持部に、軟質材からなるグリップ部材を二色成形によって装着してなる筆記具の軸筒において、前記把持部に、軸心方向に沿って延びる貫通孔を、周方向に適宜間隔を空けて複数個、形成し、前記グリップ部材を、前記貫通孔を覆うように装着するとともに、前記貫通孔に対向するグリップ部材の外表面に、軸心方向に沿って延びる凹部を形成したことを特徴とする。 The present invention relates to a shaft tube of a writing instrument in which a grip member made of a soft material is attached to a grip portion of a shaft tube main body by two-color molding, and a through-hole extending along an axial direction is provided in the grip portion. A plurality of recesses are formed at appropriate intervals in the direction, and the grip member is mounted so as to cover the through-hole, and the recess extends along the axial direction on the outer surface of the grip member facing the through-hole. Is formed.

また、前記グリップ部材が、略均一の肉厚であることを特徴とする。 Further, the grip member has a substantially uniform thickness.

また、前記貫通孔間の把持部に対向する位置のグリップ部材の外表面を把持することで、前記貫通孔間の把持部が、軸筒本体の内方方向に撓み可能としたことを特徴とする。 In addition, by gripping the outer surface of the grip member at a position opposite to the gripping portion between the through holes, the gripping portion between the through holes can be bent in the inward direction of the shaft cylinder body. To do.

本発明は、グリップ部材の把持感触がよく、滑り止め効果が向上するとともに、成形性のよい筆記具の軸筒を提供することができた。 According to the present invention, it is possible to provide a shaft cylinder of a writing instrument having a good grip feeling of the grip member, an improved anti-slip effect, and a good moldability.

次に図面を参照しながら、本発明の筆記具の軸筒の実施例を説明するが、本発明は以下の実施例に限定されるものではない。 Next, examples of the shaft cylinder of the writing instrument of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.

実施例１
図１から図３に示す実施例１の筆記具の軸筒１は、ポリプロピレンからなる前軸２と後軸３を螺合して軸筒本体を構成し、軸筒本体２、３内には、筆記具用インキ（図示せず）を収容したインキ収容管６の先端部にボールペンチップ７を装着した筆記具用レフィルを配設してあり、前軸２を取り外すことで、筆記具用レフィルを交換可能としてある。また、前軸２の把持部には、オレフィン系の熱可塑性エラストマー（硬度、Ｈｓ５０）からなるグリップ部材４を２色成形にて一体に、かつ把持部に融着して装着してある。 Example 1
A shaft cylinder 1 of the writing instrument according to the first embodiment shown in FIGS. 1 to 3 is configured by screwing a front shaft 2 and a rear shaft 3 made of polypropylene to constitute a shaft cylinder main body. A refill for a writing instrument with a ballpoint pen tip 7 attached to the tip of an ink containing tube 6 containing a writing instrument ink (not shown), and the refill for a writing instrument can be replaced by removing the front shaft 2 is there. A grip member 4 made of an olefin-based thermoplastic elastomer (hardness, Hs50) is attached to the grip portion of the front shaft 2 integrally by two-color molding and fused to the grip portion.

前軸２の把持部には、軸心方向に沿って延びる貫通孔５を、適宜間隔を空けて周方向の異なる位置に６箇所、形成してあり、この貫通孔５を閉鎖し、覆うようにグリップ部材４を装着してある。このように、前軸２の把持部に、軸心Ｊ方向に沿って延びる貫通孔５を、周方向に適宜間隔を空けて６箇所、形成することで、貫通孔５間に帯状の把持部２ａが６箇所、形成される。 The grip portion of the front shaft 2 is formed with six through holes 5 extending in the axial direction at different positions in the circumferential direction at appropriate intervals so that the through holes 5 are closed and covered. The grip member 4 is attached to the head. In this manner, by forming six through holes 5 extending along the axis J in the grip portion of the front shaft 2 at appropriate intervals in the circumferential direction, a band-shaped grip portion between the through holes 5 is formed. 2a are formed at six locations.

グリップ部材４には、軸心方向に沿って延びる凹部４ａを、適宜間隔を空けて、貫通孔５に対向するグリップ部材４の外表面の６箇所に形成してある。このように、貫通孔５に対向するグリップ部材４の外表面に凹部４ａを形成することで、グリップ部材４を把持した時の周方向への滑り止め効果が高まるとともに、貫通孔を閉鎖するグリップ部材の肉厚を薄くすることができるので、ヒケ等が発生し難くすることができる。 In the grip member 4, recesses 4 a extending along the axial direction are formed at six locations on the outer surface of the grip member 4 facing the through hole 5 with appropriate intervals. As described above, by forming the recess 4a on the outer surface of the grip member 4 facing the through hole 5, the slip prevention effect in the circumferential direction when the grip member 4 is gripped is enhanced, and the grip for closing the through hole is provided. Since the thickness of the member can be reduced, sink marks and the like can be made difficult to occur.

また、貫通孔５間の帯状の把持部２ａに対向する位置のグリップ部材４を把持した時の指の押圧力（図３の矢印Ｇ方向）によって、貫通孔５間の帯状の把持部２ａが、前軸２の内方方向に撓み可能としてある。 Further, the band-shaped grip 2a between the through-holes 5 is caused by the pressing force of the finger (in the direction of arrow G in FIG. 3) when gripping the grip member 4 at a position opposite to the band-shaped grip 2a between the through-holes 5. The front shaft 2 can be bent in the inward direction.

このように、貫通孔５間の帯状の把持部２ａに対向する位置のグリップ部材４を把持した時の指の押圧力（図３の矢印Ｇ方向）によって、貫通孔５間の帯状の把持部２ａが、前軸２の内方方向に撓むことによって、グリップ部材４の外表面の凹部４ａにより、グリップ部材４も前軸２の内方方向へ変形（図３の矢印Ｈ方向）しやすいので、グリップ部材４の外径や前軸２の把持部外径に影響することなく、グリップ部材４の把持感触及び滑り止め効果を向上することができるので、最も好ましい。 In this way, the band-shaped gripping portion between the through holes 5 by the pressing force of the finger (in the direction of arrow G in FIG. 3) when gripping the grip member 4 at a position facing the band-shaped gripping portion 2 a between the through holes 5. When 2a bends in the inward direction of the front shaft 2, the grip member 4 is also easily deformed in the inward direction of the front shaft 2 (in the direction of arrow H in FIG. 3) due to the recess 4a on the outer surface of the grip member 4. Therefore, the grip feeling and the anti-slip effect of the grip member 4 can be improved without affecting the outer diameter of the grip member 4 or the grip portion outer diameter of the front shaft 2, which is most preferable.

貫通孔５間の把持部２ａに対向する位置のグリップ部材４を把持することで、貫通孔５間の把持部２ａが、軸筒本体の内方方向に撓み可能とするには、具体的は、貫通孔５間の把持部２ａが撓みを開始する押圧力が５００ｇを超えると、把持力の弱い使用者が把持しても内側に撓まない恐れがあるため、５００ｇ以下の押圧力で撓むことが望ましい。一方、１０ｇ未満の押圧力で把持部２ａが撓むと、筆記の時に安定して把持し難く、細かな文字等を筆記し難い問題があるため、１０ｇ以上、５００ｇ以下の押圧力で撓むことが好ましい。 Specifically, by gripping the grip member 4 at a position opposite to the grip portion 2a between the through holes 5, the grip portion 2a between the through holes 5 can be bent inwardly of the shaft cylinder body. If the pressing force at which the gripping portion 2a between the through holes 5 starts to bend exceeds 500 g, there is a possibility that the user with weak gripping force may not bend inward even if gripping. Is desirable. On the other hand, if the gripping portion 2a bends with a pressing force of less than 10 g, there is a problem that it is difficult to stably grip at the time of writing, and it is difficult to write fine characters, etc. Is preferred.

この貫通孔５間の把持部２ａが、軸筒本体の内方方向に撓む押圧力は、プッシュプルスケールの先端部に、先端８ａが鋭角な縦断面が略三角形の補助具８を取付け、貫通孔５間の把持部２ａに対し、補助具８の先端８ａが前軸２の軸心Ｊの略垂線上に位置させて、グリップ部材４を装着した前軸２を金属板等の硬質の平滑面９上に横向きに置き、補助具８の先端８ａがグリップ部材４に当接した状態から荷重を加え、荷重方向（図４の矢印Ｉ方向）に、貫通孔５間の把持部２ａが沈んだ時の荷重を測定した数値を押圧力とするものである。 The pressing force at which the grip portion 2a between the through-holes 5 bends inwardly of the shaft tube main body is attached to the tip portion of the push-pull scale by attaching an auxiliary tool 8 having a substantially triangular longitudinal section with a sharp tip 8a, With respect to the grip portion 2a between the through holes 5, the front end 8a of the auxiliary tool 8 is positioned substantially on the vertical line of the axis J of the front shaft 2, and the front shaft 2 to which the grip member 4 is attached is made of a hard metal plate or the like. A load is applied from a state where the tip 8a of the auxiliary tool 8 is in contact with the grip member 4 on the smooth surface 9, and the grip portion 2a between the through holes 5 is formed in the load direction (the direction of arrow I in FIG. 4). The numerical value obtained by measuring the load when sinking is used as the pressing force.

貫通孔５の数は、特に限定されるものではないが、筆記時に、親指、人差し指、中指の３本が当接することを考慮して、貫通孔５を径方向で３箇所以上形成し、貫通孔５間の把持部２ａを３箇所以上設けることが最も好ましい。尚、把持した時の感触のバラツキを抑制するには、略同一幅の貫通孔を均等間隔に形成することが好ましい。 The number of through-holes 5 is not particularly limited, but at the time of writing, considering that three fingers of the thumb, forefinger, and middle finger come into contact, three or more through-holes 5 are formed in the radial direction so as to penetrate Most preferably, three or more gripping portions 2a between the holes 5 are provided. In order to suppress variations in feel when gripped, it is preferable to form through holes having substantially the same width at equal intervals.

また、凹部４ａの数や形成位置も特に限定されるものではないが、凹部４ａは、グリップ部材４を割り型の成形品で形成する場合を考慮して、抜き勾配を形成することが好ましい。また、貫通孔に対向するグリップ部材４の外表面に凹部４ａを形成し、グリップ部材の肉厚を略均一とすることによって、成型性が良好となる効果も奏する。 In addition, although the number and formation positions of the recesses 4a are not particularly limited, it is preferable that the recesses 4a form a draft in consideration of the case where the grip member 4 is formed of a split mold. Moreover, the recessed part 4a is formed in the outer surface of the grip member 4 which opposes a through-hole, and the effect that a moldability becomes favorable is also show | played by making the thickness of a grip member substantially uniform.

尚、本実施例では便宜上、前軸２の先端部に口先部２ｂを一体に形成してあるが、前軸２の先端部に口先部材を螺着した構造であってもよい。但し、実施例のように、前軸２に口先部２ｂとを一体に形成することで、口先部を装着する手間が省けるとともに、口先部との装着部を設けなくてもよいので、口先部の後端近傍まで貫通孔を形成できるので、口先部近傍を把持しても貫通孔間の把持部に当接するため、最も好ましい。 In the present embodiment, for the sake of convenience, the tip portion 2b is integrally formed at the tip portion of the front shaft 2, but a tip member may be screwed onto the tip portion of the front shaft 2. However, as in the embodiment, by forming the mouth portion 2b integrally with the front shaft 2, it is possible to save the trouble of attaching the mouth portion, and it is not necessary to provide a mounting portion with the mouth portion. Since the through hole can be formed up to the vicinity of the rear end, even if the vicinity of the mouth portion is gripped, it is most preferable because it comes into contact with the grip portion between the through holes.

また、実施例では、前軸２と後軸３を着脱自在に連結して軸筒を得ているが、前軸２と後軸３を一体に形成してあってもよい。 In the embodiment, the front shaft 2 and the rear shaft 3 are detachably connected to obtain the shaft cylinder. However, the front shaft 2 and the rear shaft 3 may be integrally formed.

尚、本発明の筆記具の軸筒には、ポリプロピレン、ポリエチレンテレフタレート、アクリル樹脂、ＡＢＳ樹脂等の樹脂材料や金属等、筆記具の軸筒として知られている材料を適宜選択して用いることができるが、曲げ性の高い材料、例えば、ポリプロピレンを用いることで、貫通孔間の把持部が、軸筒本体の内方方向に撓み易く、撓み量を大きくすることが可能となるため最も好ましい。 In addition, for the shaft tube of the writing instrument of the present invention, a material known as a shaft tube of a writing tool, such as a resin material such as polypropylene, polyethylene terephthalate, acrylic resin, ABS resin, or metal, can be appropriately selected and used. The use of a material with high bendability, for example, polypropylene, is most preferable because the gripping portion between the through holes can be easily bent in the inward direction of the shaft cylinder main body and the amount of bending can be increased.

また、本発明のグリップ部材は、軸筒と２色成形により一体に装着できれば特に限定されないが、透明又は半透明のグリップ部材とすることで、軸筒内のボールペンレフィルのインキ色やインキ残量を外部から視認することができる。 Further, the grip member of the present invention is not particularly limited as long as it can be integrally attached to the shaft cylinder by two-color molding, but by using a transparent or translucent grip member, the ink color and remaining ink amount of the ball pen refill in the shaft cylinder Can be visually recognized from the outside.

本発明の筆記具の軸筒は、インキやペン先の種類、出没機構に限定されるものではないので、ノック式筆記具、キャップ式筆記具として広く利用可能であり、特に、軸筒内に複数の筆記体を配設した多芯筆記具においては、軸筒の外径が大きくなる傾向であるため、本発明の効果は顕著である。 The shaft cylinder of the writing instrument of the present invention is not limited to the type of ink and nib, and the appearance mechanism, so it can be widely used as a knock-type writing instrument and a cap-type writing instrument. In the multi-core writing instrument in which the body is disposed, the outer diameter of the shaft tube tends to increase, so the effect of the present invention is remarkable.

実施例１の筆記具の軸筒を示す、縦断面図である。It is a longitudinal cross-sectional view which shows the axial cylinder of the writing instrument of Example 1. FIG. 図１におけるボールペンレフィルを省略した前軸の縦断面図である。It is the longitudinal cross-sectional view of the front axis | shaft which abbreviate | omitted the ball-point pen refill in FIG. 図２におけるＡ−Ａ断面図である。It is AA sectional drawing in FIG. 貫通孔間の把持部における撓みの押圧力を測定する図である。It is a figure which measures the pressing force of the bending in the holding part between through-holes.

符号の説明Explanation of symbols

１筆記具の軸筒
２前軸
２ａ貫通孔間の把持部
２ｂ口先部
３後軸
４グリップ部材
４ａ凹部
５貫通孔
６インキ収容管
７ボールペンチップ DESCRIPTION OF SYMBOLS 1 Writing tool shaft 2 Front shaft 2a Gripping part between through holes 2b Mouth part 3 Rear shaft 4 Grip member 4a Recessed part 5 Through hole 6 Ink receiving tube 7 Ballpoint

Claims

軸筒本体の把持部に、軟質材からなるグリップ部材を二色成形によって装着してなる筆記具の軸筒において、前記把持部に、軸心方向に沿って延びる貫通孔を、周方向に適宜間隔を空けて複数個、形成し、前記グリップ部材を、前記貫通孔を覆うように装着するとともに、前記貫通孔に対向するグリップ部材の外表面に、軸心方向に沿って延びる凹部を形成したことを特徴とする筆記具の軸筒 In a writing tube shaft in which a grip member made of a soft material is attached to the grip portion of the shaft tube main body by two-color molding, through holes extending along the axial direction are appropriately spaced in the circumferential direction in the grip portion. And a plurality of the grip members are mounted so as to cover the through hole, and a recess extending along the axial direction is formed on the outer surface of the grip member facing the through hole. Writing instrument shaft

前記グリップ部材が、略均一の肉厚であることを特徴とする請求項１に記載の筆記具の軸筒 The shaft cylinder of the writing instrument according to claim 1, wherein the grip member has a substantially uniform wall thickness.

前記貫通孔間の把持部に対向する位置のグリップ部材の外表面を把持することで、前記貫通孔間の把持部が、軸筒本体の内方方向に撓み可能としたことを特徴とする請求項１または２に記載の筆記具の軸筒 The grip portion between the through holes can be bent in an inward direction of the shaft cylinder body by gripping an outer surface of the grip member at a position facing the grip portion between the through holes. Item 1 or 2 writing tool shaft