JP7469185B2 - fountain pen - Google Patents

fountain pen Download PDF

Info

Publication number
JP7469185B2
JP7469185B2 JP2020144817A JP2020144817A JP7469185B2 JP 7469185 B2 JP7469185 B2 JP 7469185B2 JP 2020144817 A JP2020144817 A JP 2020144817A JP 2020144817 A JP2020144817 A JP 2020144817A JP 7469185 B2 JP7469185 B2 JP 7469185B2
Authority
JP
Japan
Prior art keywords
pen
ink
groove
heart hole
protrusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2020144817A
Other languages
Japanese (ja)
Other versions
JP2022039672A (en
Inventor
卓 岩原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilot Corp
Original Assignee
Pilot Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pilot Corp filed Critical Pilot Corp
Priority to JP2020144817A priority Critical patent/JP7469185B2/en
Publication of JP2022039672A publication Critical patent/JP2022039672A/en
Application granted granted Critical
Publication of JP7469185B2 publication Critical patent/JP7469185B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Pens And Brushes (AREA)

Description

本発明は万年筆に関し、詳しくは軸筒の前方部にペンとペン芯とを重ねて挿着した構造の万年筆に関する。 The present invention relates to a fountain pen, and more specifically to a fountain pen with a structure in which a pen and a pen core are inserted and stacked in the front part of the barrel.

従来、万年筆のペンは、先細形状の弾性部の先端にペンポイントを有し、軸心に沿って形成された切割溝が設けられ、切割溝の後端部に応力集中を緩和させるハート孔を有している。
また、ペン芯は、先行文献１（特開２００８－１９４９９０号公報）に記載されているように、軸筒内のインキタンクよりインキを外部へ流出させるインキ溝と、流出したインキの分だけインキタンク内に空気を取り入れる空気溝とを有している。万年筆は、ペンの切割溝がペン芯のインキ溝に隣接することで、インキ溝のインキが毛細管現象で切割溝へ移動して、筆圧でペンがその表面側に撓んで切割溝が少し広がりながら、インキがペンポイントへ移動して筆記を行うことができる構造である。 Conventionally, a fountain pen has a pen point at the tip of a tapered elastic portion, a slit formed along the axis, and a heart hole at the rear end of the slit to relieve stress concentration.
As described in Prior Document 1 (JP 2008-194990 A), the pen core has an ink groove that allows ink to flow out from an ink tank inside the barrel, and an air groove that takes in air into the ink tank in an amount equal to the amount of ink that has flowed out. A fountain pen has a structure in which the pen's slit groove is adjacent to the ink groove of the pen core, so that the ink in the ink groove moves to the slit groove by capillary action, and as the pen bends toward its surface under writing pressure and the slit groove widens slightly, the ink moves to the pen point, allowing writing to be performed.

前記ペンの切割溝の幅は、ハート孔付近でおよそ０．２ｍｍになっており、先端に行くに従い漸次近づき、ペンポイント付近で接触するように形成されている。前記ペン芯のインキ溝やペンの切割溝の幅は、毛細管現象を効率良く働かせる為に、通常およそ０．１ｍｍから０．２ｍｍの幅寸法にて形成されており、前述の通り、インキ溝から切割溝へ滑らかにインキを移動させる為には、双方の位置関係が一致していることが重要となる。したがって、ペン芯のインキ溝とペンの切割溝とを、双方の位置関係を一致させて軸筒に挿着した状態が、筆記時の筆圧などで幅方向にずれ難い構造が求められる。 The width of the pen's slit groove is approximately 0.2 mm near the heart hole, gradually decreasing toward the tip, and is formed so that they touch near the pen point. The ink groove of the pen core and the slit groove of the pen are usually formed to a width dimension of approximately 0.1 mm to 0.2 mm to allow capillary action to work efficiently, and as mentioned above, in order for ink to move smoothly from the ink groove to the slit groove, it is important that the positional relationship between the two is consistent. Therefore, a structure is required in which the ink groove of the pen core and the slit groove of the pen are inserted into the barrel with their positional relationships consistent, and are unlikely to shift in the width direction due to writing pressure, etc. when writing.

また、ペンに設けられるハート孔は、筆圧でペンがその表面側へ撓む際に掛かる切割溝の後端部の応力集中を緩和させる働きがあり、そのハート孔の大きさや形状は、切割溝の長さと共に弾性部の弾力性を左右するものである。
尚、ハート孔の内側とペン芯の表面とで、ハート孔形状の凹部が構成されることから、ペン及びペン芯をインク瓶に浸けてインキタンク内へインキを吸入した場合にも、ハート孔の内側に溜まったインキが落下して紙面を汚すことのない構造が求められる。 In addition, the heart hole provided in the pen serves to relieve the stress concentration at the rear end of the slit when the pen is bent toward the surface due to writing pressure, and the size and shape of the heart hole, together with the length of the slit, determine the elasticity of the elastic part.
Furthermore, since a heart-shaped recess is formed by the inside of the heart hole and the surface of the pen tip, a structure is required that will prevent ink that has accumulated inside the heart hole from falling and staining the paper surface even when the pen and pen tip are immersed in an ink bottle and ink is drawn into the ink tank.

特開２００８－１９４９９０号公報JP 2008-194990 A

本発明では、ペン芯のインキ溝とペンの切割溝との位置関係を一致させて軸筒に挿着した状態が、筆記時における筆圧などで幅方向にずれ難く、ハート孔の内側に溜まったインキが落下して紙面を汚すことのない万年筆を得ることを目的とする。 The objective of this invention is to provide a fountain pen that, when inserted into the barrel with the ink grooves of the pen core aligned with the slit grooves of the pen, is unlikely to shift widthwise due to the writing pressure applied when writing, and does not allow ink that has accumulated inside the heart hole to fall and stain the paper.

本発明は、
「１．軸筒の前方部にペンとペン芯とを重ねて挿着した万年筆であって、
前記ペンが、先細形状の弾性部と、前記弾性部の先端のペンポイントと、軸心に沿って形成された切割溝と、前記切割溝の後端部に形成されたハート孔と、前記弾性部の後方に位置する基部と、前記基部の後方で前記ペン芯と重なり前記軸筒に挿着される挿着部とを有し、
前記ペン芯が、前記ペンの弾性部及び基部が被さる前方部と、前記ペンの挿着部と共に前記軸筒に挿着される後方部と、前記前方部から前記後方部に渡り軸心に沿って前記ペンの切割溝と重なるよう形成されたインキ溝と、前記軸筒の内部のインキ収容部と外部とを連通させる空気溝とを有し、前記前方部の表面に前記ペンのハート孔に緩挿される突起部を有し、前記ペンのハート孔の内側面と前記ペン芯の突起部の外側面との間に隙間部が形成され、前記隙間部と前記インキ溝とが連通する構造の万年筆。
２．前記隙間部が、前記インキ溝の遠方に幅広部を有し、前記インキ溝の近傍に幅狭部を有し、前記幅狭部と前記インキ溝とが連通し、前記幅広部から前記幅狭部に向かって漸次前記隙間部が狭まり、且つ前記幅狭部の幅寸法が前記ペン芯のインキ溝の幅寸法より広い構造の前記１項に記載の万年筆。
３．前記突起部が前記ハート孔に緩挿された状態で、前記突起部の表面の高さが前記ペンの表面の高さと略一致する構造の前記１項または２項に記載の万年筆。」である。 The present invention relates to
"1. A fountain pen in which the pen and the pen core are inserted in a stacked manner into the front part of the barrel.
the pen has a tapered elastic portion, a pen point at the tip of the elastic portion, a slit formed along the axis, a heart hole formed at the rear end of the slit, a base portion located behind the elastic portion, and an insertion portion that overlaps with the pen core behind the base and is inserted into the barrel,
A fountain pen having a pen core having a front portion covered by the elastic portion and base portion of the pen, a rear portion inserted into the barrel together with the insertion portion of the pen, an ink groove formed along the axis from the front portion to the rear portion so as to overlap with the cut groove of the pen , and an air groove connecting the ink storage portion inside the barrel with the outside, the surface of the front portion having a protrusion that is loosely inserted into the heart hole of the pen, a gap formed between the inner surface of the heart hole of the pen and the outer surface of the protrusion of the pen core, and the gap connecting the ink groove.
2. The fountain pen according to paragraph 1 above, wherein the gap has a wide portion away from the ink groove and a narrow portion in the vicinity of the ink groove, the narrow portion communicates with the ink groove, the gap gradually narrows from the wide portion toward the narrow portion, and the width dimension of the narrow portion is wider than the width dimension of the ink groove of the pen core.
3. The fountain pen according to claim 1 or 2, wherein the height of the surface of the protrusion is substantially the same as the height of the surface of the pen when the protrusion is loosely inserted into the heart hole.

本発明構造では、ペンとペン芯とが重なって軸筒に挿着されることと、ペンのハート孔にペン芯の突起部が緩挿されることで、ペンがペン芯に対して、軸心に沿った方向における２点で幅方向への動きを規制されることから、ペンに筆圧が掛かった場合でも、ペン芯に対してペンが幅方向にずれることを防止できる。
また、ハート孔の内側にペン芯の突起部が緩挿されることで、ペン及びペン芯をインク瓶に浸けてインキタンク内へインキを吸入した場合でも、ハート孔の内側にインキが溜まり難いことから、インキが落下して紙面が汚れることを防止できる。 In the structure of the present invention, the pen and the pen core are overlapped and inserted into the barrel, and the protrusion of the pen core is loosely inserted into the heart hole of the pen, so that the movement of the pen in the width direction relative to the pen core is restricted at two points in the direction along the axis, and therefore, even when writing pressure is applied to the pen, the pen can be prevented from shifting in the width direction relative to the pen core.
In addition, because the protrusion of the pen tip is loosely inserted inside the heart hole, even when the pen and pen tip are immersed in an ink bottle and ink is drawn into the ink tank, ink is less likely to accumulate inside the heart hole, preventing ink from falling and staining the paper surface.

さらに、ペンのハート孔の内側面とペン芯の突起部の外側面との間に形成される隙間部が、インキ溝の遠方に幅広部を有し、インキ溝の近傍に幅狭部を有し、且つ幅狭部の幅寸法がペン芯のインキ溝の幅寸法より広い構造とすることで、隙間部の毛細管現象が幅広部から幅狭部へ向かって強く働き、隙間部に入り込んだインキは幅広部から幅狭部へ移動し、幅狭部の毛細管現象より強く働くインキ溝へインキが移動することから、さらにハート孔の内側にインキが溜まり難い構造となる。 Furthermore, the gap formed between the inside surface of the pen's heart hole and the outside surface of the protrusion of the pen core has a wide portion far from the ink groove and a narrow portion close to the ink groove, and the width dimension of the narrow portion is wider than the width dimension of the ink groove of the pen core. This structure makes it even more difficult for ink to accumulate inside the heart hole, as the capillary action in the gap works more strongly from the wide portion to the narrow portion, and ink that has entered the gap moves from the wide portion to the narrow portion, and the ink moves to the ink groove where the capillary action in the narrow portion works stronger.

さらに、ペンのハート孔が軸心方向における基部の位置に形成されることで、ハート孔を弾性変形しやすい先細形状の弾性部に形成するよりも、ペンの幅方向へのずれをより強く防止できる構造となる。 Furthermore, by forming the heart hole of the pen at the base position in the axial direction, the structure is able to better prevent the pen from shifting in the width direction than if the heart hole were formed in a tapered elastic part that is prone to elastic deformation.

ペンのハート孔の形状や大きさは特に限定されるものではなく、ペン芯の突起部の形状や大きさはハート孔に応じて設定することができるが、ハート孔に突起部が密嵌してしないようにすることが肝要である。 The shape and size of the heart hole of the pen are not particularly limited, and the shape and size of the protrusion of the pen core can be set according to the heart hole, but it is important to ensure that the protrusion does not fit tightly into the heart hole.

本発明の万年筆によれば、ペン芯のインキ溝とペンの切割溝とを双方の位置関係を一致させて軸筒に挿着した状態が、筆記時の筆圧などで幅方向にずれ難く、ハート孔の内側に溜まったインキが落下して紙面を汚すことのない万年筆が得られる。 The fountain pen of the present invention is one in which the ink grooves of the pen core and the slit grooves of the pen are aligned and inserted into the barrel, and the pen is less likely to shift in the width direction due to writing pressure, etc., and the ink that has accumulated inside the heart hole does not fall and soil the paper.

本実施形態の万年筆でありペンを側面から見た状態における縦断面図である。1 is a vertical cross-sectional view of a fountain pen according to an embodiment of the present invention, seen from the side. 本実施形態の万年筆でありペンを正面から見た状態における縦断面図である。1 is a longitudinal cross-sectional view of a fountain pen according to an embodiment of the present invention, taken from the front. 図２の前方部の拡大図である。FIG. 3 is an enlarged view of the front part of FIG. 2 . 図２のハート孔部分の拡大図である。FIG. 3 is an enlarged view of a heart hole portion of FIG. 2. ハート孔部分を側面から見た状態における拡大縦断面図である。FIG. 2 is an enlarged vertical cross-sectional view of a heart-shaped hole portion as viewed from the side.

次に、図面を参照しながら本実施形態における万年筆の説明を行うが、本発明は以下の実施例に限定されるものではない。また図中の同じ部材、同じ部品については、同じ符号としてある。尚、本実施例の説明においては、ペンがある側を前方と表現し反対側を後方と表現する。 Next, the fountain pen of this embodiment will be described with reference to the drawings, but the present invention is not limited to the following examples. The same members and parts in the drawings are given the same reference numerals. In the description of this embodiment, the side where the pen is located will be referred to as the front, and the opposite side will be referred to as the rear.

図１は、本実施形態の万年筆でありペンを側面から見た状態における縦断面図である。図２は、本実施形態の万年筆でありペンを正面から見た状態における縦断面図である。図３は、図２の前方部の拡大図である。
図に示すように本実施形態の万年筆１は、軸筒２を首部３と胴部４と尾冠５とで構成してあり、尾冠５は胴部４に圧入嵌合して一体とし、首部３と胴部４とは双方に設けた螺子部により着脱可能に螺子嵌合してある。
軸筒２の前方の開口部２ａにはペン６とペン芯７とを挿着してあり、軸筒２の内部にはインキ吸入具８を収容し、首部３の後部内面に形成した円筒状の凸部３ａに、インキ収容部８１の前端開口の内面が密着するようにして、インキ吸入具８を軸筒２に固定してある。 Fig. 1 is a vertical cross-sectional view of the fountain pen of the present embodiment as seen from the side, Fig. 2 is a vertical cross-sectional view of the fountain pen of the present embodiment as seen from the front, and Fig. 3 is an enlarged view of the front part of Fig. 2.
As shown in the figure, the fountain pen 1 of this embodiment has a barrel 2 composed of a neck 3, a body 4, and a tail cap 5, the tail cap 5 is press-fitted into the body 4 to form a single unit, and the neck 3 and the body 4 are removably screwed together by threaded portions provided on both.
A pen 6 and a pen core 7 are inserted into the opening 2a at the front of the barrel 2, and an ink suction device 8 is housed inside the barrel 2. The ink suction device 8 is fixed to the barrel 2 so that the inner surface of the front end opening of the ink storage section 81 is in tight contact with the cylindrical protrusion 3a formed on the inner surface of the rear part of the neck 3.

ペン６は、先細形状の弾性部６ａと、弾性部６ａの先端のペンポイント６ｂと、軸心に沿って形成された切割溝６ｃと、切割溝６ｃの後端部に形成されたハート孔６ｄと、弾性部６ａの後方に位置する基部６ｅと、基部６ｅの後方でペン芯７と重なり軸筒２に挿着される挿着部６ｆとを有している。
ペン芯７は、ペン６の弾性部６ａ及び基部６ｅが被さる前方部７ａと、ペン６の挿着部６ｆと共に軸筒２に挿着される後方部７ｂと、前方部７ａから後方部７ｂに渡り形成されたインキ溝７ｃと、軸筒２の内部のインキ収容部８１と外部とを連通させる空気溝７ｄとを有し、前方部の表面にペン６のハート孔６ｄに緩挿される突起部７ｅを有している。 The pen 6 has a tapered elastic portion 6a, a pen point 6b at the tip of the elastic portion 6a, a cut groove 6c formed along the axis, a heart hole 6d formed at the rear end of the cut groove 6c, a base 6e located behind the elastic portion 6a, and an insertion portion 6f that overlaps with the pen core 7 behind the base 6e and is inserted into the barrel 2.
The pen core 7 has a front portion 7a which is covered by the elastic portion 6a and base portion 6e of the pen 6, a rear portion 7b which is inserted into the barrel 2 together with the insertion portion 6f of the pen 6, an ink groove 7c formed from the front portion 7a to the rear portion 7b, and an air groove 7d which connects the ink storage portion 81 inside the barrel 2 to the outside, and has a protrusion 7e on the surface of the front portion which is loosely inserted into the heart hole 6d of the pen 6.

ペン６とペン芯７とが重なって軸筒２の開口部２ａに挿着された際には、ペン６の後端?がペン芯７の段部７ｆに当接することで、ペン芯７に対するペン６の後退が規制されると共に、ペン６とペン芯７とが抜け止め状態で軸筒２に固定される。
尚、本実施形態では、ペン６の後端部に、前方に短辺を有する台形形状の切欠部６ｇが設けられており、ペン芯７の表面に形成した矩形状の係止突部７ｇが切欠部６ｇの前端部に係止することで、ペン6とペン芯７との中心が位置合わせされ、ペン芯7のインキ溝７ｃとペン６の切割溝６ｃとを双方の位置関係を一致させて軸筒２に挿着することができる。 When the pen 6 and the pen core 7 are overlapped and inserted into the opening 2a of the barrel 2, the rear end of the pen 6 abuts against the step 7f of the pen core 7, thereby restricting the pen 6 from retracting relative to the pen core 7 and fixing the pen 6 and the pen core 7 to the barrel 2 in a non-dislodging state.
In this embodiment, the rear end of the pen 6 is provided with a trapezoidal cutout 6g with a short side at the front, and a rectangular locking protrusion 7g formed on the surface of the pen core 7 locks into the front end of the cutout 6g, thereby aligning the centers of the pen 6 and the pen core 7 and allowing the pen 6 to be inserted into the barrel 2 with the ink groove 7c of the pen core 7 and the cut groove 6c of the pen 6 aligned in position.

前述の通り、ペン６とペン芯７とが重なって軸筒２の開口部２ａに挿着されて固定されると共に、ペン６のハート孔６ｄにペン芯７の突起部７ｅが緩挿されることで、ペン６とペン芯７とが、軸心に沿った方向における前後２点で固定され、ペン６がペン芯７に対して幅方向への動きが規制されることから、ペン６に筆圧が掛かった場合でも、ペン芯７に対してペン６が幅方向にずれてしまうことが防止できる。
また、突起部７ｅがハート孔６ｄに緩挿されることで、その表面が、ペン６の表面とほぼ同じ高さとなり、また、ハート孔６ｄの内方に突起部７ｅが嵌まるので、ペン６及びペン芯７をインク瓶に浸けてインキ収容部８１へインキを吸入した場合でも、ハート孔６ｄの内側にインキが溜まり難く、インキが落下して紙面が汚れることを防止できる。
尚、ペン６のハート孔６ｄとペン芯７の突起部７ｅとが緩挿状態となることから、筆圧でペン６がその表面側に撓む動きが阻害されず、また、ペン６がペン芯７に対して幅方向に移動する動きを規制することができる。 As described above, the pen 6 and the pen core 7 are overlapped and inserted into the opening 2a of the barrel 2 and fixed, and the protrusion 7e of the pen core 7 is loosely inserted into the heart hole 6d of the pen 6, so that the pen 6 and the pen core 7 are fixed at two points, one at the front and one at the back, in the direction along the axis. Since the movement of the pen 6 in the width direction relative to the pen core 7 is restricted, even when writing pressure is applied to the pen 6, the pen 6 can be prevented from shifting in the width direction relative to the pen core 7.
In addition, by loosely inserting the protrusion 7e into the heart hole 6d, its surface becomes approximately the same height as the surface of the pen 6, and since the protrusion 7e fits inside the heart hole 6d, even when the pen 6 and the pen core 7 are immersed in an ink bottle and ink is drawn into the ink storage section 81, ink is unlikely to accumulate inside the heart hole 6d, and it is possible to prevent the ink from falling and soiling the paper surface.
Furthermore, since the heart hole 6d of the pen 6 and the protrusion 7e of the pen core 7 are in a loosely inserted state, the pen 6 is not hindered from bending toward its surface side due to writing pressure, and the pen 6 can be restricted from moving in the width direction relative to the pen core 7.

図４は、図２のハート孔部分の拡大図である。図５は、ハート孔部分を側面から見た状態における拡大縦断面図である。
図に示すように本実施例では、ペン６のハート孔６ｄを正面から見て真円形状となるように形成し、ペン芯７の突起部７ｅを正面から見て楕円形状になるように形成してあり、ペン６とペン芯７とが重なって軸筒２の開口部２ａに挿着された状態で、ハート孔６ｄの中心と突起部７ｅの中心とが一致するようにしてある。楕円形状の突起部７ｅは、軸心に沿った方向に長径を有し、幅方向に短径を有しており、軸心に沿った中心とインキ溝７ｃが形成されている。また、ペン６のハート孔６ｄの内側面とペン芯７の突起部７ｅの外側面との間に形成される隙間部Ｓは、インキ溝７ｃの遠方に幅広部Ｓｈを有し、インキ溝７ｃの近傍に幅狭部Ｓｓを有し、且つ幅狭部Ｓの幅寸法がペン芯７のインキ溝７ｃの幅寸法より広い構造としてある。このことから、ペン６及びペン芯７をインク瓶に浸けてインキ収容部８１へインキを吸入した際には、インキ溝７ｃの遠方の幅広部Ｓｈに溜まったインキは、毛細管現象でインキ溝７ｃの近傍の幅狭部Ｓｓの方へ流れ、幅狭部Ｓに溜まったインキは、毛細管現象でペン芯７のインキ溝７ｃの方へ流れ、結果、ハート孔６ｄと突起部７ｅとの隙間Ｓに残ったインキが、全てインキ溝７ｃへ移動する。 Fig. 4 is an enlarged view of the heart hole portion of Fig. 2. Fig. 5 is an enlarged vertical cross-sectional view of the heart hole portion as viewed from the side.
As shown in the figure, in this embodiment, the heart hole 6d of the pen 6 is formed to be a perfect circle when viewed from the front, and the protrusion 7e of the pen core 7 is formed to be an ellipse when viewed from the front, so that the center of the heart hole 6d and the center of the protrusion 7e coincide with each other when the pen 6 and the pen core 7 are overlapped and inserted into the opening 2a of the barrel 2. The elliptical protrusion 7e has a major axis in the direction along the axis and a minor axis in the width direction, and the ink groove 7c is formed at its center along the axis. In addition, the gap S formed between the inner surface of the heart hole 6d of the pen 6 and the outer surface of the protrusion 7e of the pen core 7 has a wide portion Sh away from the ink groove 7c and a narrow portion Ss near the ink groove 7c, and the width dimension of the narrow portion S is wider than the width dimension of the ink groove 7c of the pen core 7. For this reason, when the pen 6 and the pen core 7 are immersed in an ink bottle and ink is drawn into the ink storage section 81, the ink that has accumulated in the wide portion Sh at the far end of the ink groove 7c flows by capillary action toward the narrow portion Ss near the ink groove 7c, and the ink that has accumulated in the narrow portion S flows by capillary action toward the ink groove 7c of the pen core 7, and as a result, all of the ink remaining in the gap S between the heart hole 6d and the protrusion 7e moves to the ink groove 7c.

また、本実施形態では、ペン６のハート孔６ｄが軸心方向における基部６ｅの位置に形成してあることから、ハート孔６ｄを弾性変形しやすい先細形状の弾性部６ａに形成するよりも、ペン６の幅方向へのずれをより強く規制することが可能となる。 In addition, in this embodiment, the heart hole 6d of the pen 6 is formed at the base 6e position in the axial direction, which makes it possible to more strongly restrict the shifting of the pen 6 in the width direction than if the heart hole 6d were formed in the tapered elastic portion 6a, which is prone to elastic deformation.

１…万年筆、２…軸筒、２ａ…開口部、３…首部、３ａ…凸部、
４…胴部、５…尾冠、６…ペン、６ａ…弾性部、６ｂ…ペンポイント、６ｃ…切割溝、
６ｄ…ハート孔、６ｅ…基部、６ｆ…挿着部、６ｇ…切欠部、
７…ペン芯、７ａ…前方部、７ｂ…後方部、７ｃ…インキ溝、７ｄ…空気溝、
７ｅ…突起部、７ｆ…段部、７ｇ…係止突部、
８…インキ吸入具、８１…インキ収容部、
Ｓ…隙間部、Ｓｈ…幅広部、Ｓｓ…幅狭部。 1 ... fountain pen, 2 ... barrel, 2a ... opening, 3 ... neck portion, 3a ... convex portion,
4 ... body portion, 5 ... tail cap, 6 ... pen, 6a ... elastic portion, 6b ... pen point, 6c ... cutting groove,
6d: heart hole; 6e: base; 6f: insertion portion; 6g: notch;
7: Pen core, 7a: Front portion, 7b: Rear portion, 7c: Ink groove, 7d: Air groove,
7e: protrusion; 7f: step; 7g: locking protrusion;
8... ink suction device, 81... ink storage section,
S...gap portion, Sh...wide portion, Ss...narrow portion.

Claims (3)

軸筒の前方部にペンとペン芯とを重ねて挿着した万年筆であって、
前記ペンが、先細形状の弾性部と、前記弾性部の先端のペンポイントと、軸心に沿って形成された切割溝と、前記切割溝の後端部に形成されたハート孔と、前記弾性部の後方に位置する基部と、前記基部の後方で前記ペン芯と重なり前記軸筒に挿着される挿着部とを有し、
前記ペン芯が、前記ペンの弾性部及び基部が被さる前方部と、前記ペンの挿着部と共に前記軸筒に挿着される後方部と、前記前方部から前記後方部に渡り軸心に沿って前記ペンの切割溝と重なるよう形成されたインキ溝と、前記軸筒の内部のインキ収容部と外部とを連通させる空気溝とを有し、前記前方部の表面に前記ペンのハート孔に緩挿される突起部を有し、前記ペンのハート孔の内側面と前記ペン芯の突起部の外側面との間に隙間部が形成され、前記隙間部と前記インキ溝とが連通する構造の万年筆。 A fountain pen in which a pen and a pen core are inserted in a stacked manner into the front part of the barrel,
the pen has a tapered elastic portion, a pen point at the tip of the elastic portion, a slit formed along the axis, a heart hole formed at the rear end of the slit, a base portion located behind the elastic portion, and an insertion portion that overlaps with the pen core behind the base and is inserted into the barrel,
A fountain pen having a pen core having a front portion covered by the elastic portion and base portion of the pen, a rear portion inserted into the barrel together with the insertion portion of the pen, an ink groove formed along the axis from the front portion to the rear portion so as to overlap with the cut groove of the pen , and an air groove connecting the ink storage portion inside the barrel with the outside, the surface of the front portion having a protrusion that is loosely inserted into the heart hole of the pen, a gap formed between the inner surface of the heart hole of the pen and the outer surface of the protrusion of the pen core, and the gap connecting the ink groove. 前記隙間部が、前記インキ溝の遠方に幅広部を有し、前記インキ溝の近傍に幅狭部を有し、前記幅狭部と前記インキ溝とが連通し、前記幅広部から前記幅狭部に向かって漸次前記隙間部が狭まり、且つ前記幅狭部の幅寸法が前記ペン芯のインキ溝の幅寸法より広い構造の請求項１に記載の万年筆。2. The fountain pen of claim 1, wherein the gap portion has a wide portion away from the ink groove and a narrow portion near the ink groove, the narrow portion is connected to the ink groove, the gap portion gradually narrows from the wide portion toward the narrow portion, and the width dimension of the narrow portion is wider than the width dimension of the ink groove of the pen core. 前記突起部が前記ハート孔に緩挿された状態で、前記突起部の表面の高さが前記ペンの表面の高さと略一致する構造の請求項１または２に記載の万年筆。3. The fountain pen according to claim 1, wherein the height of the surface of the protrusion is substantially the same as the height of the surface of the pen when the protrusion is loosely inserted into the heart hole.
JP2020144817A 2020-08-28 2020-08-28 fountain pen Active JP7469185B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020144817A JP7469185B2 (en) 2020-08-28 2020-08-28 fountain pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020144817A JP7469185B2 (en) 2020-08-28 2020-08-28 fountain pen

Publications (2)

Publication Number Publication Date
JP2022039672A JP2022039672A (en) 2022-03-10
JP7469185B2 true JP7469185B2 (en) 2024-04-16

Family

ID=80498607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020144817A Active JP7469185B2 (en) 2020-08-28 2020-08-28 fountain pen

Country Status (1)

Country Link
JP (1) JP7469185B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012218228A (en) 2011-04-06 2012-11-12 Pilot Corporation Fountain pen with double pen core structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012218228A (en) 2011-04-06 2012-11-12 Pilot Corporation Fountain pen with double pen core structure

Also Published As

Publication number Publication date
JP2022039672A (en) 2022-03-10

Similar Documents

Publication Publication Date Title
US9545813B2 (en) Ball pen
JP2022105631A (en) Writing utensil
JP7469185B2 (en) fountain pen
EP1149710A1 (en) Ballpoint pen tip and ballpoint pen using the same
JP5243002B2 (en) Support structure for clip with opening / closing operation function and retractable writing instrument having the support structure
JP5066030B2 (en) Multi-core writing instrument
JP7194982B2 (en) writing instrument
JP2009029056A (en) Ball-point pen
JP7244899B2 (en) writing instrument
JP2008221512A (en) Duplex writing utensil
JP5216248B2 (en) Multi-core writing instrument
JP2514862Y2 (en) Small tube writing instrument
JP5216475B2 (en) Multi-core writing instrument
JP7555264B2 (en) fountain pen
KR200166362Y1 (en) Tip mechanism for knock-type ballpoint pen
JP2009143107A (en) Clip attachment structure of writing utensil
JP3927083B2 (en) Knock-type ballpoint pen
JP7512177B2 (en) Liquid container and manufacturing method thereof
JP4149052B2 (en) Knock-type writing instrument
TWI827627B (en) Note utensils
JP2007106051A (en) Composite writing utensil
JP2024113430A (en) Retractable ballpoint pen
JP7246410B2 (en) ink inhaler
JP4137448B2 (en) Applicator
JP2023013018A (en) writing instrument

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230606

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20240125

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20240206

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20240326

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240402

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240404

R150 Certificate of patent or registration of utility model

Ref document number: 7469185

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150