JP6549415B2 - Writing instrument - Google Patents

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JP6549415B2
JP6549415B2 JP2015105285A JP2015105285A JP6549415B2 JP 6549415 B2 JP6549415 B2 JP 6549415B2 JP 2015105285 A JP2015105285 A JP 2015105285A JP 2015105285 A JP2015105285 A JP 2015105285A JP 6549415 B2 JP6549415 B2 JP 6549415B2
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pen core
thin film
writing instrument
valve
pen
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JP2016215567A (en
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規 高力
規 高力
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Mitsubishi Pencil Co Ltd
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Mitsubishi Pencil Co Ltd
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Description

本発明は、多孔体等のペン芯を有する筆記具に関する。   The present invention relates to a writing instrument having a pen core such as a porous body.

多孔体等からなるペン先（ペン芯）の軸筒への固定に関しては、以下の特許文献１〜４が挙げられる。   About fixation to the axial cylinder of the nib (pen core) which consists of porous bodies etc., the following patent documents 1-4 are mentioned.

特許文献１には、ペン芯をペン軸本体にリング状部材によって取付けた筆記具が開示されている。   Patent Document 1 discloses a writing instrument in which a pen core is attached to a pen shaft main body by a ring-shaped member.

特許文献２には、ペン芯の環状凹部に、ホルダーの環状凸部よりなる前側取付け部が係合される筆記具が開示されている。   Patent Document 2 discloses a writing instrument in which a front attachment portion including an annular convex portion of a holder is engaged with an annular concave portion of a pen core.

特許文献３には、先軸内の環状凸部をペン芯外周の環状凹部に係合して固定する筆記具が開示されている。   Patent Document 3 discloses a writing instrument in which an annular convex portion in a tip shaft is engaged with and fixed to an annular recess on an outer periphery of a pen core.

なお、特許文献４には、ペン芯を固定するのに先軸内に装着されているが、先軸後部にペン先へのインクを一時保留するインク保溜部に枚様体を用いている。   According to Patent Document 4, although the pen core is fixed in the tip shaft to fix the pen core, a sheet-like member is used in the ink storage portion for temporarily storing the ink to the pen tip at the rear end of the tip shaft. .

特開平６−５５８９０号公報JP-A-6-55890 特開２０１２−９１４７１号公報JP 2012-91471 A 実開昭６２−１８９１８２号公報Japanese Utility Model Publication No. 62-189182 特開平１０−５８８８６号公報Unexamined-Japanese-Patent No. 10-58886 gazette

特許文献１〜３は、何れも固定のためにペン芯の外周を加工して軸筒に固定する必要があり、筆記先端へのインク塗布への影響を与えるおそれがある。   In each of Patent Documents 1 to 3, it is necessary to process the outer periphery of the pen core and fix it to the shaft cylinder in order to fix it, which may affect the application of ink to the writing tip.

また、ペン芯が前後に摺動するバルブ式の筆記具である場合、ペン芯を摺動させることができない。また、ペン芯が摩耗した際に交換することが困難である。
なお、特許文献４では、枚葉体にフィルムが用いられているが、このフィルムにはペン芯を固定する作用は無い。 Further, in the case of a valve-type writing tool in which the pen core slides back and forth, the pen core can not slide. In addition, it is difficult to replace the pen core when it wears.
In Patent Document 4, a film is used for a sheet, but this film has no function of fixing a pen core.

そこで、本発明は、バルブ機構の開放のためのペン芯前後動作（ポンピング動作）や、ペン芯交換作業時への悪影響が無い構造の筆記具を提供することを課題とする。   Then, this invention makes it a subject to provide the writing instrument of a structure without the bad influence to the pen core back-and-front operation (pumping operation) for opening of a valve mechanism, and pen core replacement | exchange operation | work.

本発明は、筆記用のペン芯を軸筒の先端に設けた筆記具において、
ペン芯と軸筒との間に可撓性の薄膜体を設けて、当該薄膜体によって当該ペン芯を当該軸筒に固定することを特徴とする筆記具である。 The present invention relates to a writing instrument provided with a pen core for writing at the tip of a barrel,
A flexible thin film is provided between a pen core and a cylinder, and the pen core is fixed to the cylinder by the thin film.

本発明においては、筆記具がインクタンクからインクを流し出すバルブ（弁機構）を設けたものであり、ペン芯が押圧されると薄膜体が変形して前記軸筒に対してペン芯が移動し、当該ペン芯の移動によって当該バルブを開閉するバルブ式であることが好適である。   In the present invention, the writing tool is provided with a valve (valve mechanism) for discharging the ink from the ink tank, and when the pen core is pressed, the thin film is deformed and the pen core moves relative to the shaft cylinder. It is preferable that it is a valve type that opens and closes the valve by the movement of the pen core.

本発明においては、前記薄膜体は略円環状に形成し、厚さ１００〜５００μｍ（０．１〜０．５ｍｍ）であることが好適である。   In the present invention, it is preferable that the thin film body be formed in a substantially annular shape and have a thickness of 100 to 500 μm (0.1 to 0.5 mm).

なお、本発明において、前記薄膜体とバルブの間には、弾性変形可能なインク保留体が配置されており、前記ペン芯が押圧されると前記薄膜体を介して前記インク保留体が押圧されて、薄膜と共にインク保留体が弾性変形するようになっていることが好適である。   In the present invention, an elastically deformable ink reservoir is disposed between the thin film and the valve, and when the pen core is pressed, the ink reservoir is pressed through the thin film. Preferably, the ink reservoir is elastically deformed along with the thin film.

本発明では、従来の筆記具に例えば円環状に形成された抜け止めの薄膜体（フィルム）を追加し、その薄膜体（フィルム）にペン先を通すことでペン先を抜けにくくすることができるようにできる。ペン先が抜ける時に非常に軽い力では抜けないよう、薄膜体（フィルム）との接触で抵抗力を持たせることができる。また、薄膜体（フィルム）自体が低荷重で撓む構造である。   In the present invention, for example, it is possible to make it difficult for the pen tip to be removed by adding a retaining thin film (film) formed in an annular shape to a conventional writing instrument and passing the pen tip through the thin film (film). You can It can be made resistant by contact with a thin film (film) so that it does not come off with a very light force when the pen tip is pulled off. In addition, the thin film body (film) itself is a structure that bends with a low load.

本発明によれば、ペン芯と軸筒との間に可撓性の薄膜体を設けて、当該薄膜体によって当該ペン芯を当該軸筒に固定した筆記具であるので、当該ペン芯がバルブ開放のために前後に動くことができ、薄膜体（フィルム）によってシールされるため、バルブからの液漏れをすること無く、ペン芯が傷んだ場合などにペン芯の交換を行う際も古いペン芯を適宜な力で引き抜くことができ、新しいペン芯を定位置に差し込むことができる。   According to the present invention, since the flexible thin film is provided between the pen core and the barrel, and the pen core is fixed to the barrel by the thin film, the pen core is a valve open valve. Can be moved back and forth and sealed by a thin film (film), so there is no liquid leakage from the valve, and even when replacing the pen core when the pen core is damaged etc., the old pen core Can be pulled out with an appropriate force, and a new pen core can be inserted into a fixed position.

第１実施形態に係る細字用筆記具の説明図であり、（ａ）〜（ｅ）が当該筆記具内の薄膜体の第１実施例〜第５実施例の説明図、（ｆ）がペン芯の説明図、（ｇ）がその筆記具の全体断面視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the writing instrument for small characters which concerns on 1st Embodiment, (a)-(e) is explanatory drawing of 1st Example-5th Example of the thin film body in the said writing instrument, (f) is a pen core Explanatory drawing, (g) is whole sectional view of the writing instrument. 第２実施形態に係る太字用筆記具の説明図であり、（ａ）〜（ｃ）が当該筆記具内の薄膜体の第６実施例〜第８実施例の説明図、（ｄ）がその筆記具の正面視図、（ｅ）が全体断面視図である。It is explanatory drawing of the writing instrument for boldness which concerns on 2nd Embodiment, (a)-(c) is explanatory drawing of 6th Example-8th Example of the thin film body in the said writing instrument, (d) is the writing instrument Front view, (e) is a whole cross sectional view.

以下図面を参照して本発明の実施形態を説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、第１実施形態に係る細字用筆記具を示す。図１の（ａ）〜（ｅ）は各実施例に係る薄膜体２２Ａ〜２２Ｅを示し、（ｆ）がペン芯１０を、（ｇ）が筆記具の全体構成を示す。   FIG. 1 shows a small writing instrument according to the first embodiment. (A)-(e) of FIG. 1 show thin film body 22A-22E which concerns on each Example, (f) shows pen core 10, (g) shows the whole structure of a writing instrument.

図１の（ｇ）に示すように、第１実施形態に係る筆記具は、筆記用のペン芯１０を軸筒１２の先端（先軸１４）に設けたマーキングペンである。   As shown in (g) of FIG. 1, the writing instrument according to the first embodiment is a marking pen in which a pen core 10 for writing is provided at the tip (tip shaft 14) of the barrel 12.

ペン芯１０は先軸１４内で前後動可能に支持されている（先軸１４内周のリブで摺動可能に支持される）。ペン芯１０の後部周囲には円環状にインク保留体１６が配設される。ペン芯１０の後方には、バルブ機構（バルブに相当）１８が設けられる。バルブ機構１８は弁体１８ａが軸筒１２内に開口した弁本体１８ｄ内に進退動可能に配置されている。弁体１８ａが先方向きにスプリング１８ｃで付勢されて、弁体１８ａが弁座１８ｂの後端に当接して閉状態になる。ペン芯１０の先端を塗布面などに押圧すると当該ペン芯１０を介して弁体１８ａが後方に移動し、弁体１８ａと弁座１８ｂとの間が開状態になりインクが前記ペン芯１０に供給される。   The pen core 10 is supported so as to be movable back and forth in the front shaft 14 (slidably supported by a rib on the inner periphery of the front shaft 14). An ink reservoir 16 is disposed around the rear of the pen core 10 in a ring shape. Behind the pen core 10, a valve mechanism (corresponding to a valve) 18 is provided. The valve mechanism 18 is disposed so as to be movable forward and backward in a valve body 18 d in which a valve body 18 a is opened in the barrel 12. The valve body 18a is urged by the spring 18c in the forward direction, and the valve body 18a abuts on the rear end of the valve seat 18b to be in the closed state. When the tip of the pen core 10 is pressed against the application surface or the like, the valve body 18a moves backward through the pen core 10, the space between the valve body 18a and the valve seat 18b is opened, and the ink is transferred to the pen core 10. Supplied.

軸筒１２の本体１２ａが内部空間あるインクタンクを構成し、それに内蔵するインクを前記バルブ機構１８の開・閉でペン芯１０にインクを導出・非導出する。本体内には、攪拌ボール１２ｂが装填されインクの沈降物を攪拌できるようになっている。   The main body 12a of the barrel 12 constitutes an ink tank having an internal space, and the ink contained therein is drawn or not drawn to the pen core 10 by opening and closing the valve mechanism 18. In the main body, a stirring ball 12b is loaded so that the sediment of the ink can be stirred.

前記本体１２ａ先端の口元にバルブ機構１８の弁座１８ｂの前方にインク保留体１６を挟んでそれらの中心孔内にペン芯１０を挿入して、先軸１４で覆い、先軸１４を本体に螺着又は嵌合で前記本体１２ａに固定する。   The pen core 10 is inserted in the center hole of the valve seat 18b of the valve mechanism 18 in front of the valve seat 18b of the valve mechanism 18 by inserting the pen core 10 into the center hole of the tip of the body 12a. It fixes to the said main body 12a by screwing or fitting.

ここで、ペン芯１０と先軸１４（軸筒１２の先端部であり、そのほかの位置でも良い）との間に可撓性の薄膜体（フィルムでも良い）２２を設けて、当該薄膜体２２によって当該ペン芯１０を当該軸筒１２に抜け止めする。   Here, a flexible thin film (which may be a film) 22 is provided between the pen core 10 and the front shaft 14 (the tip of the barrel 12 and may be at another position), and the thin film 22 The pen core 10 is prevented from coming off the cylinder 12 by this.

本実施形態においては、筆記具が軸筒１２の本体１２ａ内のインクタンクからインクを流し出すバルブ機構１８を設けたものであり、ペン芯１０が押圧されると薄膜体２２が変形して前記軸筒１２に対してペン芯１０が移動し、当該ペン芯１０の移動によって当該バルブ機構１８を開閉するバルブ式のものである。   In the present embodiment, the writing tool is provided with a valve mechanism 18 for discharging the ink from the ink tank in the main body 12a of the barrel 12. When the pen core 10 is pressed, the thin film 22 is deformed and the shaft The pen core 10 is moved with respect to the cylinder 12, and the valve mechanism 18 is opened and closed by the movement of the pen core 10.

ペン芯１０は、第１実施形態では、細字用のものであり、寸法が太さφ２．０〜φ４．０ｍｍ、長さ１８．０〜２５．０ｍｍである。   In the first embodiment, the pen core 10 is for fine printing, and the dimensions are a thickness of φ2.0 to φ4.0 mm and a length of 18.0 to 25.0 mm.

また、前記薄膜体２２は略円環状に形成し、厚さ１００〜５００μｍ（０．１〜０．５ｍｍ）であることが好適である。   The thin film 22 is formed in a substantially annular shape, and preferably has a thickness of 100 to 500 μm (0.1 to 0.5 mm).

そして、例えば既存のバルブ式の筆記具に円環状に形成された抜け止めの薄膜体（フィルム）２２を追加し、その薄膜体（フィルム）にペン芯１０を通すことでペン芯１０を抜けにくくするものである。ペン芯１０が抜ける時に非常に軽い力では抜けないよう、薄膜体（フィルム）２２との接触で抵抗力を持たせることができる。また、薄膜体（フィルム）２２自体が低荷重で撓む構造である。荷重は０．２〜２．０Ｎが好ましい。   Then, for example, a thin film body (film) 22 with a retaining shape formed in an annular shape is added to an existing valve-type writing instrument, and the pen core 10 is made difficult to be detached by passing the pen core 10 through the thin film body (film). It is a thing. The contact with the thin film (film) 22 can be made resistant so that it does not come off with a very light force when the pen core 10 comes off. In addition, the thin film body (film) 22 itself has a structure that bends with a low load. The load is preferably 0.2 to 2.0N.

薄膜体２２は、図１（ｇ）に示すように筆記具の軸筒１２内（先軸１４内）に収容されている。当該薄膜体２２は、その外周と先軸１４内面との間に隙間が形成され、前後に摺動可能な配置となっている（先軸１４内に圧入としても良い）。   The thin film 22 is accommodated in the barrel 12 (in the tip barrel 14) of the writing instrument as shown in FIG. 1 (g). A gap is formed between the outer periphery of the thin film body 22 and the inner surface of the front shaft 14 so as to be slidable back and forth (it may be a press fit into the front shaft 14).

また、薄膜体２２はプラスチック成形品からなり、厚さ１００〜５００μｍ、好ましくは１５０〜３００μｍが望ましい。具体的には、薄膜体２２は、ポリプロピレンやポリエチレン、ポリエステル等の樹脂材を選択でき、柔軟に撓む厚みであることが好ましい。   Further, the thin film 22 is made of a plastic molded product, and desirably has a thickness of 100 to 500 μm, preferably 150 to 300 μm. Specifically, the thin film 22 can be made of a resin material such as polypropylene, polyethylene, polyester, etc., and preferably has a thickness that allows it to flex flexibly.

また、薄膜体はペン芯の保持領域はペン芯外周の８０〜９５％程度の保持が望ましい。   In the thin film, it is desirable that the holding area of the pen core is about 80 to 95% of the outer circumference of the pen core.

前記インク保留体１６は柔軟な弾性のある多孔質体やスポンジ状体である。材質としては、ウレタン、ポリエチレン等の樹脂材を選択できる。   The ink reservoir 16 is a flexible elastic porous body or a sponge-like body. As a material, resin materials, such as urethane and polyethylene, can be selected.

前記ペン芯１０は、棒状の繊維束の樹脂加工体、又は多孔質体からなる。材質としては、アクリル、ポリエステル、ナイロン等を選択できる。   The pen core 10 is made of a resin-processed body of a rod-like fiber bundle or a porous body. As a material, acrylic, polyester, nylon or the like can be selected.

実施形態のペン芯１０は図１（ｆ）に示すように、棒状の後部周面が段状に凹んだ係止凹部１０ａが形成されている。薄膜体２２は、一部の開放した或いは閉鎖した概略円形であり、内側部分を前記凹部１０ａに引っかけてペン芯１０が先軸１４から前後動可能でかつ抜け出ない構造になっている。   As shown in FIG. 1 (f), the pen core 10 of the embodiment is provided with a locking recess 10a in which a bar-like rear peripheral surface is stepped in a step. The thin film 22 is a part of an open or closed circular shape, and the inner portion is hooked to the recess 10 a so that the pen core 10 can move back and forth from the front shaft 14 and can not come off.

第１実施形態に係る筆記具では、ペン芯１０と軸筒１２との間に可撓性の薄膜体２２を設けて、当該薄膜体２２は、凹部１０ａに嵌りこんでいるとともに、薄膜体２２とペン芯１０は前後動可能になっている。よって、当該ペン芯１０がバルブ機構１８のバルブ開放のために前後に動くことができる。また、ペン芯１０が傷んだ場合などにペン芯１０の交換を行う際も古いペン芯１０を適宜な力で引き抜くことができ、新しいペン芯１０を定位置に容易に差し込むことができる。   In the writing instrument according to the first embodiment, a flexible thin film 22 is provided between the pen core 10 and the barrel 12, and the thin film 22 is fitted in the recess 10a, and the thin film 22 and The pen core 10 can move back and forth. Thus, the pen core 10 can move back and forth to open the valve mechanism 18. Also, when replacing the pen core 10 when the pen core 10 is damaged, the old pen core 10 can be pulled out with an appropriate force, and the new pen core 10 can be easily inserted into the fixed position.

ここで、薄膜体２２の各例である第１実施例〜第５実施例を図１（ａ）〜（ｅ）に示す。   Here, first to fifth embodiments which are examples of the thin film member 22 are shown in FIGS. 1 (a) to 1 (e).

第１実施例に係る薄膜体２２（２２Ａ）は、図１（ａ）に示すように、中央部の孔が矩形であり、一部が外径方向に解放した概略Ｃ字状の構造のものである。内側の孔（ペン芯挿通孔）に面する解放口２２Ａ１の幅が狭くなっており、その解放口２２Ａ１のコーナー部２２Ａ２が前記凹部１０ａに引っかかり、抜け止めする。   As shown in FIG. 1A, the thin film 22 (22A) according to the first embodiment has a substantially C-shaped structure in which the hole at the central portion is rectangular and a part thereof is released in the outer diameter direction. It is. The width of the release port 22A1 facing the inner hole (pen core insertion hole) is narrowed, and the corner portion 22A2 of the release port 22A1 is caught on the recess 10a and prevented from coming off.

第２実施例に係る薄膜体２２（２２Ｂ）は、図１（ｂ）に示すように、中央部の孔が矩形であり、一部が外径方向に解放した概略Ｃ字状の構造のものである。内側の孔（ペン芯挿通孔）から解放口２２Ｂ１が開いている。その解放口２２Ｂ１が第１実施例の解放口２２Ａ１よりも広く、その解放口２２Ｂ１に面していない内周面２２Ｂ２の幅が狭くなっており、前記ペン芯１０の凹部１０ａに引っかかり、抜け止めする。   As shown in FIG. 1 (b), the thin film 22 (22B) according to the second embodiment has a roughly C-shaped structure in which the hole at the central portion is rectangular and a portion is released in the outer diameter direction. It is. The release port 22B1 is open from the inner hole (pen core insertion hole). The release port 22B1 is wider than the release port 22A1 of the first embodiment, and the width of the inner peripheral surface 22B2 not facing the release port 22B1 is narrow, and the hook 10a of the pen core 10 is caught and retained. Do.

第３実施例に係る薄膜体２２（２２Ｃ）は、図１（ｃ）に示すように、中央部の孔は概略円形であり、中央部に向けて３つの弁状の突部２２Ｃ１が突出し、突部２２Ｃ１の先端部の内周径が前記ペン芯１０の凹部１０ａ外周径に近似（やや大径又は小径でも良い）して引っかかるように形成されている。   In the thin film 22 (22C) according to the third embodiment, as shown in FIG. 1 (c), the hole at the central portion is substantially circular, and three valve-like protrusions 22C1 project toward the central portion, The inner peripheral diameter of the tip end portion of the projection 22C1 is formed so as to be hooked by approximating to the outer peripheral diameter of the recess 10a of the pen core 10 (it may be slightly larger or smaller).

第４実施例に係る薄膜体２２（２２Ｄ）は、図１（ｄ）に示すように、中央部の孔は概略円形であり、中央部に向けて２つの弁状の突部２２Ｄ１が突出し、突部２２Ｄ１の先端部の内周径が前記ペン芯１０の凹部１０ａ外周径に近似（やや大径又は小径でも良い）して引っかかるように形成されている。第４実施例に係る薄膜体２２Ｄでは、２つの弁状の突部２２Ｄ１が突出しているので空間があり、第３実施例に係る薄膜体２２よりもペン芯１０を挿通しやすく作業性が高い。   In the thin film 22 (22D) according to the fourth embodiment, as shown in FIG. 1 (d), the hole at the central portion is substantially circular, and two valve-like protrusions 22D1 project toward the central portion, The inner peripheral diameter of the tip end portion of the protrusion 22D1 is formed so as to be caught by being approximated (may be slightly larger or smaller) to the outer peripheral diameter of the recess 10a of the pen core 10. In the thin film 22D according to the fourth embodiment, since two valve-shaped protrusions 22D1 project, there is a space, and it is easier to insert the pen core 10 than the thin film 22 according to the third embodiment, and the workability is high. .

第５実施例に係る薄膜体２２（２２Ｅ）は、図１（ｅ）に示すように、中央部の孔は概略円形であり、中央部に向けて２つの弁状の突部２２Ｅ１が突出し、突部２２Ｅ１の先端部の内周径が前記ペン芯１０の凹部１０ａ外周径に近似（やや大径又は小径でも良い）して引っかかるように形成されている。第５実施例に係る薄膜体２２Ｅでは、２つの弁状の突部２２Ｅ１が形成されていない部分２２Ｅ２の内周部がやや突出し、第４実施例に係る薄膜体２２よりも薄膜体の強度が上がり、弾性変形の際に割れにくくなる。   In the thin film 22 (22E) according to the fifth embodiment, as shown in FIG. 1 (e), the hole at the central portion is substantially circular, and two valve-like projections 22E1 project toward the central portion, The inner peripheral diameter of the tip end portion of the projection 22E1 is formed so as to be hooked by approximating to the outer peripheral diameter of the recess 10a of the pen core 10 (it may be slightly larger or smaller). In the thin film 22E according to the fifth embodiment, the inner peripheral portion of the portion 22E2 where the two valve-like protrusions 22E1 are not formed is slightly protruded, and the strength of the thin film is smaller than that of the thin film 22 according to the fourth embodiment. It rises and becomes less likely to break during elastic deformation.

次に、本発明の第２実施形態に係る筆記具について説明する。   Next, a writing instrument according to a second embodiment of the present invention will be described.

図２は第２実施形態に係る太字用筆記具である。   FIG. 2 shows a writing instrument for bold according to a second embodiment.

第２実施形態に係る筆記具は、図２（ｄ）、（ｅ）に示すように、ペン芯が第１実施形態よりも太くした太字用のマーキングペンである。なお、以下及び図２では、図１の第１実施形態に係る筆記具と同様部分に同一符号を付している。   The writing instrument according to the second embodiment is a marking pen for bold face in which the pen core is thicker than that of the first embodiment, as shown in FIGS. In addition, in the following and FIG. 2, the same code | symbol is attached | subjected to the same part as the writing instrument which concerns on 1st Embodiment of FIG.

ペン芯１０は、太字用のものであり、寸法は太さφ６．０〜φ９．０ｍｍ、長さ２５〜３０ｍｍである。   The pen core 10 is for bold face, and the dimensions are a thickness φ 6.0 to φ 9.0 mm and a length 25 to 30 mm.

また、前記ペン芯１０は先端部が斜めに削られて細くなって形状であるが、第１実施形態の凹部１０ａの有るペン芯１０とは異なり、中央部から後端部に同じ外径で円柱状に形成されている。   In addition, although the pen core 10 has a shape in which the tip end portion is beveled and becomes thin, unlike the pen core 10 with the recess 10 a of the first embodiment, the center portion to the rear end portion have the same outer diameter It is formed in a cylindrical shape.

上記ペン芯１０が挿通する薄膜体２２は、ペン芯１０に挿通させた状態で当該ペン芯１０の外周面に食い込ませて係止又は固定し、その状態で先軸１４内に前後動可能に装着されている。   The thin film body 22 through which the pen core 10 is inserted is engaged with the outer peripheral surface of the pen core 10 in a state of being inserted into the pen core 10 and locked or fixed, and in that state, can be moved back and forth in the front shaft 14 It is attached.

図２（ａ）〜（ｃ）は、薄膜体２２の第６実施例〜第８実施例を示す。   FIGS. 2A to 2C show sixth to eighth examples of the thin film body 22. FIG.

第６実施例に係る薄膜体２２（２２Ｆ）は、図２（ａ）に示すように、中央部の孔がほぼ楕円形であり、一部の開放口２２Ｆ１が外径方向に解放した概略Ｃ字状の構造のものである。この薄膜体２２Ｆにおいては、内側の孔（ペン芯挿通孔）に面する解放口２２Ｆ１の幅が狭くなっている。前記解放口２２Ｆ１奥側の対向部２２Ｆ３がペン芯１０に向けて膨出している。前記解放口２２Ｆ１を挟む内側の両コーナー部２２Ｆ２と前記奥側の対向部２２Ｆ３が前記ペン芯１０に径方向から（３箇所）食い込み、当該ペン芯１０を抜け止めする。   In the thin film 22 (22F) according to the sixth embodiment, as shown in FIG. 2 (a), the hole at the central portion is substantially elliptical, and the outline C of the opening 22F1 partially released in the outer diameter direction It has a letter-like structure. In the thin film 22F, the width of the opening 22F1 facing the inner hole (pen core insertion hole) is narrow. The opposing portion 22F3 on the back side of the release opening 22F1 bulges toward the pen core 10. Both inner corner portions 22F2 sandwiching the release opening 22F1 and the opposite portion 22F3 on the back side bite into the pen core 10 in the radial direction (three places), and the pen core 10 is prevented from being removed.

第７実施例に係る薄膜体２２（２２Ｇ）は、図２（ｂ）に示すように、中央部の孔が矩形であり、一部が外径方向に解放した概略Ｃ字状の構造のものである。内側の孔（ペン芯挿通孔）から解放口２２Ｇ１が開いている。その解放口２２Ｇ１が第６実施例の解放口２２Ｆ１よりも広く、その解放口２２Ｇ１に面していない内周面２２Ｇ２の幅が狭くなっており、前記ペン芯１０の外周に引っかかり、抜け止めする。   As shown in FIG. 2B, the thin film 22 (22G) according to the seventh embodiment has a roughly C-shaped structure in which the hole at the central portion is rectangular and a part thereof is released in the outer diameter direction. It is. A release port 22G1 is opened from an inner hole (pen core insertion hole). The release port 22G1 is wider than the release port 22F1 of the sixth embodiment, and the width of the inner peripheral surface 22G2 not facing the release port 22G1 is narrowed, and the end is caught on the outer periphery of the pen core 10 to prevent removal. .

第８実施例に係る薄膜体２２（２２Ｈ）は、図２（ｃ）に示すように、中央部の孔は概略円形であり、中央部に向けて３つの弁状の突部２２Ｈ１が突出し、突部２２Ｈ１の先端部の内周径が前記ペン芯１０の外周径に近似（やや小径が好ましい）して引っかかるように形成されている。   In the thin film 22 (22H) according to the eighth embodiment, as shown in FIG. 2C, the hole at the central portion is substantially circular, and three valve-like projections 22H1 project toward the central portion, The inner peripheral diameter of the tip end portion of the projection 22H1 is formed so as to be caught by being approximated to the outer peripheral diameter of the pen core 10 (a little smaller diameter is preferable).

本発明の筆記具は、現場や事業所内で部品や製品にマーキングするマーキングペンとして利用することができる。   The writing instrument of the present invention can be used as a marking pen for marking parts and products in a field or business place.

１０ ペン芯
１２ 軸筒
１４ 先軸
１８ バルブ機構
２２（２２Ａ〜２２Ｈ） 薄膜体 10 pen core 12 shaft cylinder 14 tip shaft 18 valve mechanism 22 (22A-22H) thin film

Claims (1)

筆記用のペン芯を軸筒の先端に設けた筆記具において、
ペン芯と軸筒との間に可撓性の薄膜体を設けて、当該薄膜体によって当該ペン芯を当該軸筒に固定すると共に、筆記具がインクタンクからインクを流し出すバルブを設けたものであり、
ペン芯が押圧されると薄膜体が変形して前記軸筒に対してペン芯が移動し、当該ペン芯の移動によって当該バルブを開閉するバルブ式であることを特徴とする筆記具。 In a writing instrument provided with a pen core for writing at the tip of the barrel,
Provided flexible film body between the pen core and the barrel, both when fixing the pen core to the shaft tube by the thin film material, which was provided with a valve which writing instrument flush ink from the ink tank Yes,
When the pen core is pressed, the thin film is deformed to move the pen core with respect to the shaft cylinder, and the valve is opened and closed by the movement of the pen core .
JP2015105285A 2015-05-25 2015-05-25 Writing instrument Expired - Fee Related JP6549415B2 (en)

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