JP2007190843A

JP2007190843A - Pen

Info

Publication number: JP2007190843A
Application number: JP2006012242A
Authority: JP
Inventors: Toshiaki Tanaka; 利昭田中
Original assignee: SUISHOIN KK
Current assignee: SUISHOIN KK
Priority date: 2006-01-20
Filing date: 2006-01-20
Publication date: 2007-08-02

Abstract

PROBLEM TO BE SOLVED: To provide a pen which is effective for acquiring a correct way of gripping a penholder. SOLUTION: A first regulating recess 5 whereon the tip bulb of the forefinger F1 of a writer is put, a second regulating recess 6 whereon the lateral side of the tip of the middle finger F2 is put, and a third regulating recess 7 which is offset to the rear end side of the penholder 1 from these first and second regulating recesses 5 and 6 and whereon the ball of the thumb F3 is put, are formed on the outer peripheral surface of the front end part of the penholder 1 at almost equal intervals along the circumferential direction of the penholder 1. The first regulating recess 5 becomes shallower, while getting warped around the axis of the penholder 1 in such a manner as to separate from the third regulating recess 7 toward the rear of the penholder 1. COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は，万年質やボールペン，シャープペン等のペンに関し，特に筆記者が硬筆習字に際してペン軸の正しい把持の仕方を修得するのに有効なペンに関する。 The present invention relates to pens such as perennial quality, ballpoint pens, and mechanical pens, and more particularly to a pen that is effective for a writer to learn how to properly hold a pen shaft when writing a hard brush.

従来，ペン軸の筆圧を安定させたり，疲労の軽減を図るべく，ペン軸の断面形状を非円形にしたものは，例えば下記特許文献１に開示されるように既に知られている。しかしながら，硬筆習字に当たっては，先ずペン軸を正しく把持することが肝要であるところ，その正しい把持の仕方を教習，修得させるペンは，これまで見当たらない。
特開平２００３−１７０６９５号公報 2. Description of the Related Art Conventionally, a pen shaft having a non-circular cross-sectional shape in order to stabilize the pen shaft writing pressure or reduce fatigue has already been known, for example, as disclosed in Patent Document 1 below. However, it is important to first properly grasp the pen axis when writing a pen calligraphy. However, no pen has been found so far that teaches and learns how to properly grasp it.
Japanese Patent Laid-Open No. 2003-170695

そこで本発明は，筆記者が硬筆習字に際してペン軸の正しい把持の仕方を修得するのに有効なペンを提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a pen that is effective for a writer to learn how to properly hold a pen shaft when writing a hard brush.

上記目的を達成するために，本発明は，ペン軸の前端部外周面に，筆記者の人指し指の先端腹部をあてがう第１規制凹部と，中指の先端部側面をあてがう第２規制凹部と，これら第１及び第２規制凹部よりペン軸の後端側にオフセットしていて親指の先端腹部をあてがう第３規制凹部とをペン軸の周方向に沿って略等間隔に形成し，前記第１規制凹部は，ペン軸の後方に向かって前記第３規制凹部から離れるようにペン軸の軸線周りに捩じれながら浅くなっていることを第１の特徴とする。 In order to achieve the above object, the present invention includes a first restriction recess that applies the tip of the writer's index finger to the outer peripheral surface of the pen shaft, a second restriction recess that assigns the side of the tip of the middle finger, A third restricting recess that is offset from the first and second restricting recesses toward the rear end side of the pen shaft and that applies the tip of the thumb is formed at substantially equal intervals along the circumferential direction of the pen shaft. The first feature is that the concave portion becomes shallower while being twisted around the axis of the pen shaft so as to be separated from the third restriction concave portion toward the rear of the pen shaft.

また本発明は，第１の特徴に加えて，前記第３規制凹部より前方のペン軸に，前方に向かって開放する半楕円形のマークを表示し，ペン軸の紙面に対する角度が適正であるとき，筆記者側から見て前記マークが略直線状に見えるようにしたことを第２の特徴とする。 In addition to the first feature, the present invention displays a semi-elliptical mark that opens forward on the pen shaft in front of the third restriction recess, and the angle of the pen shaft with respect to the paper surface is appropriate. At this time, the second feature is that the mark appears to be substantially linear when viewed from the writer side.

さらに本発明は，第１又は第２の特徴に加えて，ペン軸を前端側の前軸半体と後端側の後軸半体との分割すると共に，これら両半体を，それぞれに嵌合するガイド部材を介して連結し，このガイド部材には，前記両半体に係合して両半体相互の位相を規制する位置決め突起を設けたことを第３の特徴とする。 Furthermore, in addition to the first or second feature, the present invention divides the pen shaft into a front shaft half on the front end side and a rear shaft half on the rear end side, and both halves are fitted to each. The guide member is connected via a mating guide member, and the guide member is provided with positioning protrusions that engage with the two halves to regulate the phase between the two halves.

本発明の第１の特徴によれば，筆記者は，ペン軸の第１規制凹部に人指し指の先端腹部をあてがい，第２規制凹部に中指の先端部側面をあてがい，第３規制凹部に親指の先端腹部をあてがうことにより，ペン軸を正しく把持することができ，硬筆習字の上達が促進される。 According to the first feature of the present invention, the writer assigns the tip abdomen of the index finger to the first restriction recess of the pen shaft, the side of the tip of the middle finger to the second restriction recess, and the thumb to the third restriction recess. By applying the tip of the abdomen, the pen shaft can be gripped correctly, and the improvement of the calligraphy is promoted.

しかも，人指し指をあてがう第１規制凹部は，ペン軸の後方に向かって第３規制凹部から離れるようにペン軸の軸線周りに捩じれながら浅くなっているから，第１規制凹部に人指し指が自然に馴染むのみならず，筆記者の手の大きさが変わっても，その人指し指を第１規制凹部に違和感無く，且つ正しくあてがうことができる。 In addition, the first restriction recess to which the index finger is applied is shallower while being twisted around the axis of the pen shaft so as to be separated from the third restriction recess toward the rear of the pen shaft, so that the index finger naturally adapts to the first restriction recess. In addition, even if the size of the writer's hand changes, the index finger can be correctly applied to the first restriction recess without any sense of incongruity.

本発明の第２の特徴によれば，筆記の際に，正しく把持したペン軸の前端部外周面の半楕円形のマークが，筆記者側から略直線状に見えるように，ペン軸の姿勢を調整することにより，ペン軸の紙面に対する角度が正しく規制することができ，筆記をスムーズに行うことができて硬筆習字の上達が更に促進される。 According to the second feature of the present invention, during writing, the pen shaft posture is such that the semi-elliptical mark on the outer peripheral surface of the front end of the pen shaft that is correctly gripped appears to be substantially straight from the writer side. By adjusting the angle, the angle of the pen shaft with respect to the paper surface can be regulated correctly, writing can be performed smoothly, and the progress of hard brush writing is further promoted.

本発明の第３の特徴によれば，ペン軸は複雑な形状をなしていても，これを前軸半体及び後軸半体に分割することで，これらを合成樹脂により容易に成形することができ，しかもこれら前軸及び後軸半体を，位置決め突起を持ったガイド部材を介して正規の位相関係に連結するので，ペン軸を誤組立することなく，能率良く製造することができる。 According to the third feature of the present invention, even if the pen shaft has a complicated shape, it can be easily molded with a synthetic resin by dividing the pen shaft into a front shaft half and a rear shaft half. In addition, since the front shaft and the rear shaft half are connected to each other in a normal phase relationship via a guide member having a positioning protrusion, the pen shaft can be efficiently manufactured without misassembly.

本発明の実施の形態を，添付図面に示す本発明の好適な実施例に基づいて以下に説明する。 Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

図１は本発明の実施例に係るボールペンの正面図，図２は図１の２矢視図，図３は図１の３矢視図，図４は図２の４矢視図，図５は図３の５−５線断面図，図６は図３の６−６線拡大断面図，図７は同ボールペンの把持要領を示す，親指側から見た斜視図，図８は同ボールペンの把持要領を示す，人指し指側から見た斜視図，図９は同ボールペンの姿勢調整要領を示す斜視図である。 1 is a front view of a ballpoint pen according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1, FIG. 3 is a view taken in the direction of arrow 3 in FIG. Is a sectional view taken along the line 5-5 in FIG. 3, FIG. 6 is an enlarged sectional view taken along the line 6-6 in FIG. 3, FIG. 7 is a perspective view of the ballpoint pen showing the gripping procedure, and FIG. FIG. 9 is a perspective view showing a gripping procedure as seen from the index finger side, and FIG. 9 is a perspective view showing a posture adjustment procedure of the ballpoint pen.

先ず図１〜図６において，本発明を実施したボールペンＰは，合成樹脂製のペン軸１と，このペン軸１の前端部に取り付けられるキャップ２と，このキャップ２に支持されるボールペン先３と，このボールペン先３の後端に取り付けされてインクを貯留しなながらペン軸１内に挿入される可撓性のペン芯４とから構成される。 1 to 6, a ballpoint pen P embodying the present invention includes a synthetic resin pen shaft 1, a cap 2 attached to the front end of the pen shaft 1, and a ballpoint pen tip 3 supported by the cap 2. And a flexible pen core 4 which is attached to the rear end of the ballpoint pen tip 3 and inserted into the pen shaft 1 while storing ink.

図１〜図４，図７及び図８に示すように，ペン軸１の前端部外周面には，筆記者の人指し指Ｆ１の先端腹部をあてがう第１規制凹部５と，中指Ｆ２の先端部側面をあてがう第２規制凹部６と，これら第１及び第２規制凹部５，６よりペン軸１の後端側にオフセットしていて親指Ｆ３の先端腹部をあてがう第３規制凹部７とがペン軸１の周方向に沿って略等間隔に形成され，その際，第１規制凹部５は，ペン軸１の後方に向かって第３規制凹部７から離れるようにペン軸１の軸線周りに捩じれながら浅くなっている。 As shown in FIGS. 1 to 4, 7, and 8, the front end portion outer peripheral surface of the pen shaft 1 has a first restriction recess 5 that applies the tip abdomen of the writer's index finger F 1 and the side surface of the tip portion of the middle finger F 2. The second restriction recess 6 applied to the pen shaft 1 and the third restriction recess 7 offset from the first and second restriction recesses 5 and 6 to the rear end side of the pen shaft 1 and applied to the tip of the thumb F3 The first restricting recess 5 is shallowly twisted about the axis of the pen shaft 1 so as to be separated from the third restricting recess 7 toward the rear of the pen shaft 1. It has become.

またペン軸１の後半部には，筆記者の人指し指Ｆ１の基部側面が当たる，ペン軸１の周方向の曲率が小さい支持面８が形成されると共に，この支持面８と反対側には抉り面９が形成され，これら支持面８及び抉り面９とで，ペン軸１の後半部はヘラ状に形成される。 In addition, a support surface 8 having a small curvature in the circumferential direction of the pen shaft 1 is formed in the latter half of the pen shaft 1 and the base surface of the writer's index finger F1 is hit. A surface 9 is formed, and the latter half of the pen shaft 1 is formed in a spatula shape by the support surface 8 and the turning surface 9.

図１〜図３及び図９に明示するように，さらに第３規制凹部７より前方のペン軸１には，前方に向かって開放する半楕円形のマーク１０が表示され，図示例の場合，そのマーク１０を境にして前部が後部より一段下がるように形成される。このマーク１０は，ペン軸１の紙面に対する角度が適正であるとき，筆記者の視線Ｌにマーク１０が略直線状に並ぶようになっている。即ち，筆記者は，マーク１０を略直線状に見ることになる。 As clearly shown in FIG. 1 to FIG. 3 and FIG. 9, a semi-elliptical mark 10 opened toward the front is displayed on the pen shaft 1 further forward than the third restricting recess 7. The front part is formed one step lower than the rear part with the mark 10 as a boundary. When the angle of the pen shaft 1 with respect to the paper surface is appropriate, the mark 10 is arranged substantially linearly on the line of sight L of the writer. That is, the writer sees the mark 10 substantially linearly.

図３，図５及び図６において，上記ペン軸１は，合成樹脂を素材とする射出成形を容易にすべく，キャップ２側即ち前端側の前軸半体１Ａと，後端側の後軸半体１Ｂとに分割され，これら半体１Ａ，１Ｂは，それぞれに圧入されるガイド部材１２を介して相互に一体に連結される。このガイド部材１２の外周面には幅広の第１位置決め突起１２ａと幅狭の第２位置決め突起１２ｂとが互いに反対側を向くよう一体に形成されており，これらを前軸及び後軸半体１Ａ，１Ｂの内周面に形成された幅広の第１位置決め溝１３ａ，１３ａと幅狭の第２位置決め溝１３ｂ，１３ｂとに係合することにより，前軸及び後軸半体１Ａ，１Ｂは互いに正規の位相関係に連結される。 3, 5, and 6, the pen shaft 1 includes a front shaft half 1 A on the cap 2 side, that is, the front end side, and a rear shaft on the rear end side in order to facilitate injection molding using a synthetic resin material. It divides | segments into the half body 1B, and these half bodies 1A and 1B are mutually connected integrally through the guide member 12 press-fit in each. A wide first positioning protrusion 12a and a narrow second positioning protrusion 12b are integrally formed on the outer peripheral surface of the guide member 12 so as to face opposite sides of each other, and these are formed on the front shaft and the rear shaft half 1A. By engaging the wide first positioning grooves 13a, 13a and the narrow second positioning grooves 13b, 13b formed on the inner peripheral surface of 1B, the front and rear shaft halves 1A, 1B are mutually connected. Connected to a regular phase relationship.

またガイド部材１２は，前軸半体１Ａの前端面より突出したねじ軸１２ｓを備えており，これに前記キャップ２が螺合される。こうしてキャップ２はペン軸１の前端部に取り付けられる。 The guide member 12 includes a screw shaft 12s protruding from the front end surface of the front shaft half 1A, and the cap 2 is screwed to the screw shaft 12s. Thus, the cap 2 is attached to the front end portion of the pen shaft 1.

上記ガイド部材１２及び後軸半体１Ｂには，前記ペン芯４が挿入される一連のガイド孔１４が形成され。このガイド孔１４は，後軸半体１Ｂにおいてペン芯４の後端を受け止めるように行き止まりとなっている。またこのガイド孔１４は，ペン軸１の形状から多少屈曲していてもよく，この場合，可撓性のペン芯４は撓むことで，屈曲したガイド孔１４への挿入が可能となる。 A series of guide holes 14 into which the pen core 4 is inserted are formed in the guide member 12 and the rear shaft half 1B. The guide hole 14 is a dead end so as to receive the rear end of the pen core 4 in the rear shaft half 1B. Further, the guide hole 14 may be bent slightly from the shape of the pen shaft 1. In this case, the flexible pen core 4 is bent so that the guide hole 14 can be inserted into the bent guide hole 14.

次に，この実施例の作用について説明する。 Next, the operation of this embodiment will be described.

本発明のボールペンＰを使用して硬筆習字を行う際，筆記者は，図７及び図８に示すように，ペン軸１の第１規制凹部５に筆記者の人指し指Ｆ１の先端腹部をあてがい，第２規制凹部６に中指Ｆ２の先端部側面をあてがい，第３規制凹部７に親指Ｆ３の先端腹部をあてがうことにより，ペン軸１を把持する。その際，第１〜第３規制凹部５〜７は，ペン軸１の周方向に沿って略等間隔に形成され，且つ第３規制凹部７は，第１及び第２規制凹部５，６よりペン軸１の後端側にオフセットしているので，上記により筆記者はペン軸１を正しく把持することができ，硬筆習字の上達が促進される。 When performing a hard brush calligraphy using the ballpoint pen P of the present invention, the writer assigns the tip abdomen of the writer's index finger F1 to the first restriction recess 5 of the pen shaft 1, as shown in FIGS. The pen shaft 1 is gripped by applying the side surface of the tip of the middle finger F2 to the second restriction recess 6 and the tip of the tip of the thumb F3 to the third restriction recess 7. At that time, the first to third restricting recesses 5 to 7 are formed at substantially equal intervals along the circumferential direction of the pen shaft 1, and the third restricting recess 7 is formed from the first and second restricting recesses 5 and 6. Since it is offset to the rear end side of the pen shaft 1, the writer can correctly hold the pen shaft 1 by the above, and the progress of hard penmanship is promoted.

また人指し指Ｆ１をあてがう第１規制凹部５は，ペン軸１の後方に向かって第３規制凹部７から離れるようにペン軸１の軸線周りに捩じれながら浅くなっているから，第１規制凹部５に人指し指Ｆ１が自然に馴染むのみならず，筆記者の手の大きさが変わっても，その人指し指Ｆ１を第１規制凹部５に違和感無く，且つ正しくあてがうことができる。 Further, the first restriction recess 5 to which the index finger F1 is applied is shallower while being twisted around the axis of the pen shaft 1 so as to be separated from the third restriction recess 7 toward the rear of the pen shaft 1. Not only does the index finger F1 naturally adapt, but even if the size of the writer's hand changes, the index finger F1 can be correctly applied to the first restricting recess 5 without feeling uncomfortable.

しかも筆記の際には，図９に示すように，正しく把持したペン軸１の前端部外周面の半楕円形のマーク１０が，筆記者側から略直線状に見えるように，ペン軸１の姿勢を調整すれば，ペン軸１の紙面に対する角度が正しいものとなり，筆記をスムーズに行うことができて硬筆習字の上達が更に促進される。 In addition, as shown in FIG. 9, when writing, the semi-elliptical mark 10 on the outer peripheral surface of the front end portion of the pen shaft 1 that is correctly gripped is visible on the pen shaft 1 so that it can be seen as a substantially straight line from the writer side. If the posture is adjusted, the angle of the pen shaft 1 with respect to the paper surface is correct, writing can be performed smoothly, and the progress of hard brush writing is further promoted.

筆記中，筆記者の人指し指Ｆ１の基部側面は，ペン軸１の後半部の，周方向の曲率が小さい支持面８に当接することになるから，人指し指Ｆ１の基部側面の面圧を低く抑えることができ，筆記中の疲労軽減に寄与し得る。 During writing, the base side surface of the writer's index finger F1 comes into contact with the support surface 8 of the second half of the pen shaft 1, which has a small circumferential curvature, so that the surface pressure of the base side surface of the index finger F1 is kept low. Can contribute to reducing fatigue during writing.

しかも，上記支持面８と反対側のペン軸１には抉り面９が形成されるので，この抉り面９の深さの大小によりペン軸１の重心を自由に設定することができる。 Moreover, since the pen shaft 1 on the side opposite to the support surface 8 is formed with a turning surface 9, the center of gravity of the pen shaft 1 can be freely set according to the depth of the turning surface 9.

またペン軸１は，前記第１〜第３規制凹部５〜７，並びに支持面８及び抉り面９を備えた複雑な形状をなしていても，これを前軸半体１Ａ及び後軸半体１Ｂに分割して成形するので，これらを合成樹脂を素材として容易に射出成形することができ，しかもこれら前軸及び後軸半体１Ａ，１Ｂを，第１及び第２位置決め突起１２ａ，１２ｂを持ったガイド部材１２を介して正規の位相関係に連結するので，ペン軸１を誤組立することなく，能率良く製造することができる。 Further, even if the pen shaft 1 has a complicated shape including the first to third regulating recesses 5 to 7 and the support surface 8 and the turning surface 9, it can be divided into the front shaft half 1A and the rear shaft half. Since it is divided and molded into 1B, these can be easily injection-molded using synthetic resin as a raw material, and the front and rear shaft halves 1A and 1B are formed by the first and second positioning projections 12a and 12b. Since it is connected to the regular phase relationship via the guide member 12 that it has, the pen shaft 1 can be efficiently manufactured without erroneous assembly.

以上，本発明の実施例について説明したが，本発明はそれに限定されることなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば本発明は，万年筆やシャープペンにも実施することができる。 As mentioned above, although the Example of this invention was described, this invention is not limited to it, A various design change is possible in the range which does not deviate from the summary. For example, the present invention can be applied to a fountain pen and a mechanical pen.

本発明の実施例に係るボールペンの正面図である。It is a front view of the ball-point pen concerning the example of the present invention. 図２は図１の２矢視図である。FIG. 2 is a view taken in the direction of arrow 2 in FIG. 図１の３矢視図である。FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1. 図２の４矢視図である。FIG. 4 is a view taken in the direction of arrow 4 in FIG. 2. 図３の５−５線断面図である。FIG. 5 is a sectional view taken along line 5-5 of FIG. 図３の６−６線拡大断面図である。FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG. 同ボールペンの把持要領を示す，親指側から見た斜視図である。It is the perspective view seen from the thumb side which shows the holding point of the ball-point pen. 同ボールペンの把持要領を示す，人指し指側から見た斜視図である。It is the perspective view seen from the index finger side which shows the holding point of the ball-point pen. 同ボールペンの姿勢調整要領を示す斜視図である。It is a perspective view which shows the attitude | position adjustment point of the ball-point pen.

符号の説明Explanation of symbols

Ｆ１・・・・人指し指
Ｆ２・・・・中指
Ｆ３・・・・親指
Ｐ・・・・・ペン（ボーペン）
１・・・・・ペン軸
１Ａ・・・・前軸半体
１Ｂ・・・・後軸半体
５・・・・・第１規制凹部
６・・・・・第２規制凹部
７・・・・・第３規制凹部
１０・・・・マーク
１２ａ，１２ｂ・・・位置決め突起 F1 ... index finger F2 ... middle finger F3 ... thumb P ... pen (bow pen)
DESCRIPTION OF SYMBOLS 1 ... Pen shaft 1A ... Front shaft half 1B ... Rear shaft half 5 ... 1st control recessed part 6 ... 2nd control recessed part 7 ... ..Third regulating recess 10... Marks 12a, 12b.

Claims

ペン軸（１）の前端部外周面に，筆記者の人指し指（Ｆ１）の先端腹部をあてがう第１規制凹部（５）と，中指（Ｆ２）の先端部側面をあてがう第２規制凹部（６）と，これら第１及び第２規制凹部（５，６）よりペン軸（１）の後端側にオフセットしていて親指（Ｆ３）の先端腹部をあてがう第３規制凹部（７）とをペン軸（１）の周方向に沿って略等間隔に形成し，前記第１規制凹部（５）は，ペン軸（１）の後方に向かって前記第３規制凹部（７）から離れるようにペン軸（１）の軸線周りに捩じれながら浅くなっていることを特徴とするペン。 A first regulating recess (5) that applies the tip abdomen of the writer's index finger (F1) to the outer peripheral surface of the front end of the pen shaft (1) and a second regulating recess (6) that applies the side of the tip of the middle finger (F2) And a third regulating recess (7) that is offset from the first and second regulating recesses (5, 6) to the rear end side of the pen shaft (1) and that is applied to the tip of the thumb (F3). The first restriction recess (5) is formed at substantially equal intervals along the circumferential direction of (1), and the first restriction recess (5) is separated from the third restriction recess (7) toward the rear of the pen shaft (1). A pen characterized by being shallow while twisting around the axis of (1).

請求項１記載のペンにおいて，
前記第３規制凹部（７）より前方のペン軸（１）に，前方に向かって開放する半楕円形のマーク（１０）を表示し，ペン軸（１）の紙面に対する角度が適正であるとき，筆記者側から見て前記マーク（１０）が略直線状に見えるようにしたことを特徴とするペン。 The pen of claim 1,
When a semi-elliptical mark (10) opened forward is displayed on the pen shaft (1) in front of the third restricting recess (7), and the angle of the pen shaft (1) with respect to the paper surface is appropriate The pen characterized in that the mark (10) looks substantially linear when viewed from the writer side.

請求項１又は２記載のペンにおいて，
ペン軸（１）を前端側の前軸半体（１Ａ）と後端側の後軸半体（１Ｂ）との分割すると共に，これら両半体（１Ａ，１Ｂ）を，それぞれに嵌合するガイド部材（１２）を介して連結し，このガイド部材（１２）には，前記両半体（１Ａ，１Ｂ）に係合して両半体（１Ａ，１Ｂ）相互の位相を規制する位置決め突起（１３ａ，１３ｂ）を設けたことを特徴とするペン。
The pen according to claim 1 or 2,
The pen shaft (1) is divided into a front shaft half (1A) on the front end side and a rear shaft half (1B) on the rear end side, and both halves (1A, 1B) are fitted to each other. Positioning protrusions that are connected via a guide member (12) and that engage with the halves (1A, 1B) to regulate the phases of the halves (1A, 1B). A pen provided with (13a, 13b).