JP7457357B2

JP7457357B2 - writing instrument adapter

Info

Publication number: JP7457357B2
Application number: JP2020099077A
Authority: JP
Inventors: 浩純藤原
Original assignee: 東京金属工業株式会社
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2024-03-28
Anticipated expiration: 2040-06-08
Also published as: JP2021192955A

Description

本発明は、筆記具の軸筒内に、例えばボールペンリフィルやシャーペンリフィールなどの中芯を選択的に装着可能にするために用いられる筆記具用アダプタに関する。 The present invention relates to a writing instrument adapter that is used to selectively attach a core such as a ballpoint pen refill or mechanical pencil refill to the barrel of a writing instrument.

従来、この種の筆記具用アダプタとして、先端側にリフィルの基部側が装着される長孔が設けられ、ホルダ所定のリフィルよりも短いリフィルにアダプタを装着したときの長さが、ホルダ所定のリフィルの長さと同じになるようにしたボールペンのリフィルアダプタがある（例えば、特許文献１参照）。
リフィルアダプタは、樹脂製の先端側パーツと金属製の基端側パーツとゴムリングで構成され、先端側パーツの全長に亘り、リフィルの基部側とほぼ等しい径の長孔が開口している。基端側パーツの端面には、ホルダのリフィルの操作機構（ノック式）と係止する突起が設けられる。リフィルアダプタの使用手順は、先端側パーツの長孔に、使用しようとするリフィルの基部を挿入し、リフィルの基端をゴムリングの孔に挿入して固定する。この状態で、ホルダ所定のリフィルと長さが一致している。
また、その他の筆記具用アダプタとして、第１リフィルと、第１リフィルよりも小さな外径でかつ長尺の第２リフィルとを選択的に取り付けることができる筆記具用ホルダがある（例えば、特許文献２参照）。
筆記具用ホルダは、その内周面に大径で短尺な第１リフィルを挟持するためのリブと、第１リフィルを係止するための段部と、小径で長尺な第２リフィルを挟持するためのリブと、第２リフィルを係止するための段部と、を設けている。大径で短尺な第１リフィルと小径で長尺な第２リフィルを筆記具用ホルダに取り付けることで、長尺な第２リフィルが短尺な第１リフィルよりも後退して保持される。このため、両者の取り付け状態で全長は略同一となり、筆記具用ホルダを第１リフィルと第２リフィルに共用化することが可能になる。さらに短尺な第１リフィルまたは長尺な第２リフィルの任意の一方を取り付けた状態で、これらリフィルを含む全長が、第３リフィルの全長と略同一とした場合には、三種類のリフィルが選択的に交換可能になる。 Conventionally, this type of writing instrument adapter includes a ballpoint pen refill adapter that has a long hole at the tip into which the base side of the refill is attached, so that when the adapter is attached to a refill that is shorter than the refill specified for the holder, the length of the adapter is the same as the length of the refill specified for the holder (see, for example, Patent Document 1).
The refill adapter is composed of a plastic tip part, a metal base part, and a rubber ring, and a long hole with a diameter almost equal to that of the base part of the refill is opened over the entire length of the tip part. A protrusion is provided on the end face of the base part to engage with the refill operation mechanism (knock type) of the holder. The refill adapter is used by inserting the base part of the refill to be used into the long hole of the tip part, and inserting and fixing the base end of the refill into the hole of the rubber ring. In this state, the length is the same as that of the refill specified in the holder.
Another example of a writing instrument adapter is a writing instrument holder that can selectively attach a first refill and a second refill that has a smaller outer diameter and is longer than the first refill (see, for example, Patent Document 2).
The writing implement holder has a rib for holding the large-diameter, short first refill on its inner circumferential surface, a step for locking the first refill, a rib for holding the small-diameter, long second refill, and a step for locking the second refill. By attaching the large-diameter, short first refill and the small-diameter, long second refill to the writing implement holder, the long second refill is held further back than the short first refill. Therefore, the total length of both refills is approximately the same when both refills are attached, and the writing implement holder can be used for both the first refill and the second refill. Furthermore, when either the short first refill or the long second refill is attached, if the total length including these refills is approximately the same as the total length of the third refill, the three types of refills can be selectively replaced.

登録実用新案第３１９９６２７号公報Registered utility model No. 3199627 特開２００３－９４８７８号公報JP2003-94878A

ところで、ボールペンリフィルやシャーペンリフィールなどの中芯は、筆記具の種類やメーカーごとに長さや径サイズが異なる多種多様なものが存在している。
しかし乍ら、特許文献１では、先端側パーツにおいて長孔の内径や長さが一つのリフィルと対応した所定サイズに特定されているため、長さが異なるリフィルを挿入した場合には、ホルダ所定のリフィルと長さが不一致で利用不能となる。また長孔の内径よりも大径なリフィルを挿入できない。このように所定サイズのリフィルとは長さサイズや径サイズが異なるリフィルを使用可能にするには、先端側パーツの全体を製作し直す必要があり、コストアップになるとともに、多種類のリフィルに対応するには製品管理も大変になるという問題があった。
特許文献２では、筆記具用ホルダの挟持用リブ及び係止用リブが二つのリフィルと対応した所定サイズに特定されているため、第１リフィルや第２リフィルと長さが異なるリフィルを挿入した場合には、軸筒専用リフィールと長さが不一致で利用不能となる。また筆記具用ホルダの内径よりも大径なリフィルを挿入できない。このように所定サイズのリフィルとは長さサイズや径サイズが異なるリフィルを使用可能にするには、筆記具用ホルダの全体を製作し直す必要があり、コストアップになるとともに、多種類のリフィルに対応するには製品管理も大変になるという問題があった。 By the way, there are a wide variety of cores for ballpoint pen refills, mechanical pencil refills, etc., with different lengths and diameters depending on the type of writing instrument and manufacturer.
However, in Patent Document 1, the inner diameter and length of the elongated hole in the distal end part are specified to be a predetermined size corresponding to one refill. The refill and length do not match and it becomes unusable. Also, a refill with a diameter larger than the inner diameter of the elongated hole cannot be inserted. In order to make it possible to use refills with different lengths and diameters than the predetermined size refills, it is necessary to remanufacture the entire tip end part, which increases costs and makes it difficult to use refills of various types. There was a problem in that product management would be difficult to respond to.
In Patent Document 2, the gripping ribs and locking ribs of the writing instrument holder are specified to have a predetermined size corresponding to two refills, so when a refill with a length different from the first refill or the second refill is inserted. It cannot be used because the length does not match the barrel-specific refill. Furthermore, a refill with a diameter larger than the inner diameter of the writing instrument holder cannot be inserted. In order to make it possible to use refills with different lengths and diameters than the predetermined size refills, it is necessary to remanufacture the entire writing instrument holder, which increases costs and makes it difficult to use a wide variety of refills. There was a problem in that product management would be difficult to respond to.

このような課題を解決するために本発明に係る筆記具用アダプタは、筆記具の軸筒内に装着される交換可能な中芯に取り付けられる筆記具用アダプタであって、前記中芯の外径よりも大径な筒状部材と、前記筒状部材の内部全体に亘り形成されて前記中芯の基端部が挿入される貫通孔と、前記貫通孔に挿入された前記中芯の基端縁と対向して前記筒状部材の軸方向一部に設けられる係合凸部と、前記貫通孔に挿入された前記中芯の基端外周面と対向して前記筒状部材の周方向一部に設けられる押圧凸部と、を備え、前記係合凸部は、前記貫通孔の軸方向一部が塑性変形によって前記中芯の前記基端縁に向け突出するように形成された塑性係止部位を有し、該塑性係止部位は、前記貫通孔に前記中芯が挿入された状態で前記基端縁に当接し、前記押圧凸部は、前記貫通孔の周方向一部が塑性変形によって前記中芯の前記基端外周面に向け突出するように形成された塑性挟持部位を有し、該塑性挟持部位は、前記貫通孔に前記中芯が挿入された状態で前記基端外周面に圧接することを特徴とする。
In order to solve such problems, the writing instrument adapter according to the present invention is a writing instrument adapter that is attached to an exchangeable core that is installed in the barrel of a writing instrument, and that has a diameter smaller than the outer diameter of the core. a large diameter cylindrical member; a through hole formed throughout the interior of the cylindrical member into which the proximal end of the core is inserted; a proximal edge of the core inserted into the through hole; an engaging protrusion provided on a part of the axial direction of the cylindrical member to face each other; a pressing convex portion provided, the engaging convex portion being a plastic locking portion formed such that a portion of the through hole in the axial direction protrudes toward the proximal edge of the central core through plastic deformation; The plastic locking portion contacts the proximal edge when the core is inserted into the through hole, and the pressing convex portion is formed by plastic deformation of a portion of the through hole in the circumferential direction. A plastic clamping portion is formed to protrude toward the outer circumferential surface of the proximal end of the core, and the plastic clamping portion is formed on the outer circumferential surface of the proximal end with the core inserted into the through hole. It is characterized by pressure contact .

本発明の実施形態（第一実施形態）に係る筆記具用アダプタの全体構成を示す説明図であり、（ａ）が筆記具の軸筒内に筒状部材と中芯を装着した状態の縦断正面図、（ｂ）が筒状部材の正面図、（ｃ）が軸筒専用中芯の正面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing the overall configuration of a writing instrument adapter according to an embodiment (first embodiment) of the present invention, in which (a) is a longitudinal sectional front view of a state in which a cylindrical member and a core are installed in a barrel of a writing instrument. , (b) is a front view of the cylindrical member, and (c) is a front view of the core exclusively for the shaft cylinder. 図１（ａ）の（２）－（２）線に沿える軸筒を除いた筒状部材及び中芯の拡大横断平面図である。FIG. 2 is an enlarged cross-sectional plan view of the cylindrical member and the core along line (2)-(2) of FIG. 1(a), excluding the shaft cylinder. 本発明の実施形態に係る筆記具用アダプタの他の例（第二実施形態）を示す説明図であり、（ａ）が筆記具の軸筒内に筒状部材と第一中芯を装着した場合の縦断正面図、（ｂ）が筒状部材に第二中芯を挿入した場合の縦断正面図、（ｃ）が軸筒専用中芯の正面図である。It is an explanatory view showing another example (second embodiment) of the writing instrument adapter according to the embodiment of the present invention, and (a) is an explanatory diagram showing a case where the cylindrical member and the first core are installed in the barrel of the writing instrument. (b) is a longitudinal front view when the second core is inserted into the cylindrical member, and (c) is a front view of the core exclusively for the shaft cylinder.

以下、本発明の実施形態を図面に基づいて詳細に説明する。
本発明の実施形態に係る筆記具用アダプタＡは、図１～図３に示すように、筆記具Ｂの軸筒Ｂ１内にサイズが異なる中芯Ｃを選択的に装着可能にするためのリフィルアダプタや筆記具用ホルダなどである。
筆記具Ｂとしては、軸筒Ｂ１内に１本の中芯Ｃが装着される単色のボールペンやシャープペンシル、複数本の中芯Ｃが装着される多色のボールペンやシャープペンシルなどが挙げられる。軸筒Ｂ１内に筆記具用アダプタＡとの組み合わせで装着される中芯Ｃとしては、軸方向の長さサイズや径サイズが異なる多種類のボールペンリフィルやシャーペンリフィールなどが挙げられる。
このため、筆記具Ｂが単色のボールペンやシャープペンシルである場合には、筆記具用アダプタＡとの組み合わせで中芯Ｃとして１本のボールペンリフィルやシャーペンリフィールが装着される。
また、筆記具Ｂが多色のボールペンやシャープペンシルである場合には、筆記具用アダプタＡとの組み合わせで中芯Ｃとして１本又は複数本のボールペンリフィルやシャーペンリフィールが装着される。 Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
As shown in FIGS. 1 to 3, the writing instrument adapter A according to the embodiment of the present invention is a refill adapter that allows cores C of different sizes to be selectively installed in the barrel B1 of the writing instrument B. Such as a holder for writing instruments.
Examples of the writing instrument B include a single-color ballpoint pen or mechanical pencil in which one core C is mounted in the barrel B1, and a multicolor ballpoint pen or mechanical pencil in which a plurality of cores C are mounted. Examples of the core C installed in the barrel B1 in combination with the writing instrument adapter A include many types of ballpoint pen refills and mechanical pencil refills with different axial lengths and diameters.
Therefore, when the writing instrument B is a single-color ballpoint pen or mechanical pencil, one ballpoint pen refill or mechanical pencil refill is attached as the core C in combination with the writing instrument adapter A.
Further, when the writing instrument B is a multicolored ballpoint pen or mechanical pencil, one or more ballpoint pen refills or mechanical pencil refills are attached as the core C in combination with the writing instrument adapter A.

筆記具Ｂの具体例として図１～図３に示される場合には、軸筒専用中芯Ｄとなるスプリング止め付きのボールペンリフィルが、軸筒Ｂ１内に軸方向へ往復動自在に装着された単色のノック式ボールペンである。スプリング止め付きのボールペンリフィルの外面に突設された突起Ｄ１と、軸筒Ｂ１の先端内面との間にスプリングなどのバネ材からなる弾性部材Ｂ４を介装することで、リフィル先端のボール部Ｄ２を軸筒Ｂ１の先端開口Ｂ２から出し入れ可能に支持している。
図示例では、軸筒専用中芯Ｄとなるスプリング止め付きのボールペンリフィルに代えて、長さサイズや径サイズが異なるボールペンリフィルと筆記具用アダプタＡとの組み合わせを交換可能にしている。
また、その他の例として図示しないが、筆記具Ｂを単色のノック式ボールペンに代えて、ノック式以外のボールペンや多色のボールペンに変更することや、スプリング止め付きのボールペンリフィルに代えて、長さサイズや径サイズが異なるスプリング止め無しのボールペンリフィルと筆記具用アダプタＡとの組み合わせを交換可能に変更することも可能である。 1 to 3 show a specific example of writing implement B, which is a single-color knock-type ballpoint pen in which a ballpoint pen refill with a spring stopper, which serves as a core D for the barrel, is mounted in barrel B1 so as to be freely movable back and forth in the axial direction. An elastic member B4 made of a spring material such as a spring is interposed between a protrusion D1 protruding from the outer surface of the ballpoint pen refill with a spring stopper and the inner surface at the tip of barrel B1, thereby supporting a ball portion D2 at the tip of the refill so as to be able to be inserted and removed from the tip opening B2 of barrel B1.
In the illustrated example, instead of a ballpoint pen refill with a spring stopper that serves as a core D for the barrel, combinations of ballpoint pen refills with different length sizes and diameter sizes and writing instrument adapters A are interchangeable.
As other examples (not shown), it is possible to change the writing instrument B from a single-color knock-type ballpoint pen to a non-knock-type ballpoint pen or a multi-color ballpoint pen, or to replace the ballpoint pen refill with a spring stop with an interchangeable combination of a ballpoint pen refill without a spring stop and a writing instrument adapter A having a different length or diameter size.

詳しく説明すると、本発明の実施形態に係る筆記具用アダプタＡは、中芯Ｃの外径よりも大径な筒状部材１からなる。
筒状部材１は、錆難い金属や硬質合成樹脂などからなるチューブであり、工具（図示しない）の打ち込みなどによる塑性加工が容易な金属製チューブが好ましい。
筒状部材１は、筒状部材１の内部に設けられる貫通孔１１と、筒状部材１の軸方向一部に設けられる係合凸部１２と、筒状部材１の周方向一部に設けられる押圧凸部１３と、筆記具Ｂの芯固定部Ｂ３と軸方向へ係合する取付部１４と、を主要な構成要素として備えている。
さらに筒状部材１は、筆記具Ｂの弾性部材Ｂ４と軸方向へ当接する受け面１５と、筒状部材１の先端側外面に設けられる中芯Ｃの挿入側標識１６と、を備えることが好ましい。 To explain in detail, the writing instrument adapter A according to the embodiment of the present invention includes a cylindrical member 1 having a larger diameter than the outer diameter of the core C.
The cylindrical member 1 is a tube made of rust-resistant metal, hard synthetic resin, or the like, and is preferably a metal tube that can be easily plastically worked by driving a tool (not shown).
The cylindrical member 1 has a through hole 11 provided inside the cylindrical member 1, an engagement protrusion 12 provided in a part of the cylindrical member 1 in the axial direction, and a part of the cylindrical member 1 in the circumferential direction. The main components include a pressing convex portion 13 and a mounting portion 14 that engages with the lead fixing portion B3 of the writing instrument B in the axial direction.
Further, the cylindrical member 1 preferably includes a receiving surface 15 that comes into contact with the elastic member B4 of the writing instrument B in the axial direction, and an insertion side mark 16 of the core C provided on the outer surface on the distal end side of the cylindrical member 1. .

貫通孔１１は、筒状部材１の軸方向全体に亘って略同じ内径に形成される。貫通孔１１の内径は、使用する多種類の中芯Ｃのうち最大外径サイズの中芯Ｃよりも大きくなるように設定され、貫通孔１１の先端側開口１１ａから中芯Ｃの基端部Ｃ１が軸方向へ挿入される。
係合凸部１２は、中芯Ｃを軸方向へ位置決めするためのストッパーであり、貫通孔１１に挿入された中芯Ｃの基端縁Ｃ２と軸方向へ対向して突出形成される。
詳しく説明すると係合凸部１２は、筒状部材１の基端側において中芯Ｃの基端縁Ｃ２と軸方向へ対向する軸方向の一部を、塑性加工により中芯Ｃの基端縁Ｃ２に向け径方向へ突出させるように塑性変形することで構成される。係合凸部１２の塑性加工方法としては、筒状部材１に対する工具の打ち込みなどで、筒状部材１の軸方向一部を部分的に塑性変形させることが好ましい。
つまり、係合凸部１２は、貫通孔１１に中芯Ｃが挿入された状態で中芯Ｃの基端縁Ｃ２に当接する塑性係止部位１２ａを有している。このため、貫通孔１１に対する中芯Ｃの基端部Ｃ１の挿入で、中芯Ｃの基端縁Ｃ２が係合凸部１２の塑性係止部位１２ａに当接して係合することにより、中芯Ｃの全体を軸方向（芯挿入方向）へ移動不能に支持して定位置に位置決めされる。 The through hole 11 is formed to have substantially the same inner diameter throughout the axial direction of the cylindrical member 1 . The inner diameter of the through hole 11 is set to be larger than the center core C of the maximum outer diameter size among the various types of cores C used, and the part from the distal opening 11a of the through hole 11 to the proximal end of the center core C. C1 is inserted in the axial direction.
The engagement protrusion 12 is a stopper for positioning the core C in the axial direction, and is formed to protrude axially opposite to the proximal edge C2 of the core C inserted into the through hole 11.
To explain in detail, the engagement convex portion 12 is formed by plastic working a part of the axially opposite proximal edge C2 of the center core C on the base end side of the cylindrical member 1. It is configured by being plastically deformed so as to protrude in the radial direction toward C2. As a method for plastically working the engaging convex portion 12, it is preferable to partially plastically deform a portion of the cylindrical member 1 in the axial direction by driving a tool into the cylindrical member 1 or the like.
That is, the engagement convex portion 12 has a plastic locking portion 12a that abuts the proximal edge C2 of the core C when the core C is inserted into the through hole 11. Therefore, when the base end C1 of the core C is inserted into the through hole 11, the base edge C2 of the core C comes into contact with and engages with the plastic locking portion 12a of the engagement convex portion 12, so that the base end C1 of the core C is inserted into the through hole 11. The entire core C is supported immovably in the axial direction (core insertion direction) and positioned at a fixed position.

押圧凸部１３は、中芯Ｃを径方向へ位置決めするための突起であり、貫通孔１１に挿入された中芯Ｃの基端外周面Ｃ３と径方向へ対向して突出形成される。
詳しく説明すると押圧凸部１３は、筒状部材１の基端側において中芯Ｃの基端外周面Ｃ３と周方向へ対向する径方向の一部を、塑性加工により中芯Ｃの基端外周面Ｃ３に向け径方向へ突出させるように塑性変形することで構成される。押圧凸部１３の塑性加工方法としては、筒状部材１に対する工具の打ち込みなどで、筒状部材１の周方向一部を部分的に塑性変形させることが好ましい。
つまり、押圧凸部１３は、貫通孔１１に中芯Ｃが挿入された状態で中芯Ｃの基端外周面Ｃ３に圧接する塑性挟持部位１３ａを有している。このため、貫通孔１１に対する中芯Ｃの基端部Ｃ１の挿入で、中芯Ｃの基端外周面Ｃ３が押圧凸部１３に圧接して挟み込むことにより、中芯Ｃの全体を径方向及び軸方向（芯挿入方向）へ移動不能に支持して定位置に位置決めされる。 The pressing convex portion 13 is a protrusion for positioning the core C in the radial direction, and is formed to protrude radially opposite to the proximal outer circumferential surface C3 of the core C inserted into the through hole 11.
To explain in detail, the pressing convex portion 13 is formed by plastic working a part of the radial direction facing the proximal outer circumferential surface C3 of the center core C in the circumferential direction on the proximal end side of the cylindrical member 1. It is configured by being plastically deformed so as to protrude in the radial direction toward the surface C3. As a method for plastically forming the pressing convex portion 13, it is preferable to partially plastically deform a portion of the cylindrical member 1 in the circumferential direction by driving a tool into the cylindrical member 1 or the like.
That is, the pressing convex portion 13 has a plastic clamping portion 13a that presses against the proximal outer peripheral surface C3 of the core C when the core C is inserted into the through hole 11. Therefore, when the base end C1 of the core C is inserted into the through hole 11, the base end outer circumferential surface C3 of the core C comes into pressure contact with the pressing convex part 13 and is sandwiched therebetween, so that the entire core C is radially and It is supported immovably in the axial direction (core insertion direction) and positioned at a fixed position.

係合凸部１２及び押圧凸部１３の一例（第一実施形態）として図１（ａ）（ｂ）～図２に示される場合には、筒状部材１に一組の係合凸部１２及び押圧凸部１３が設けられた単一サイズの中芯Ｃのみと対向可能な第一の筆記具用アダプタＡ１である。
図示例では、係合凸部１２の塑性係止部位１２ａを周方向へ一つ配備し、押圧凸部１３の塑性挟持部位１３ａを周方向へ所定間隔毎に一対配備している。
これに加えて塑性係止部位１２ａの形状は、軸方向と交差する方向へ長い横長な断面円弧状に突出するように工具を打ち込んで塑性変形させている。塑性挟持部位１３ａの形状は、軸方向へ長い縦長な断面円弧状に突出するように工具を打ち込んで塑性変形させている。
これにより、第一の筆記具用アダプタＡ１において筒状部材１の貫通孔１１に対し、中芯Ｃが定位置まで挿入されると、係合凸部１２の塑性係止部位１２ａや押圧凸部１３の塑性挟持部位１３ａで中芯Ｃを位置決めして一体的に取り付けられる。この取り付け状態では、第一の筆記具用アダプタＡ１と中芯Ｃが一体化して交換芯ACとなる。図１（ａ）に示される交換芯ACの全長Ｌは、筒状部材１の軸方向長さと、貫通孔１１の先端側開口１１ａから突出した中芯Ｃの先端部（ボール部）Ｃ４まで長さとの和となり、図１（ｃ）に示される軸筒専用中芯Ｄの全長Ｌと同じ長さになる。
また、係合凸部１２及び押圧凸部１３の変形例として図示しないが、塑性係止部位１２ａを周方向へ所定間隔毎に複数配置することや、塑性挟持部位１３ａを周方向へ一つ又は所定間隔毎に３つ以上配置することなどの変更が可能である。さらに塑性係止部位１２ａや塑性挟持部位１３ａの形状を図示例以外の形状に変更することも可能である。 In the case shown in FIGS. 1(a), 1(b) to 2 as an example (first embodiment) of the engaging convex portion 12 and the pressing convex portion 13, a set of the engaging convex portions 12 is provided on the cylindrical member 1. and a first writing instrument adapter A1 that can face only a core C of a single size provided with a pressing convex portion 13.
In the illustrated example, one plastic locking portion 12a of the engagement convex portion 12 is provided in the circumferential direction, and a pair of plastic clamping portions 13a of the pressing convex portion 13 are provided at predetermined intervals in the circumferential direction.
In addition, the shape of the plastic locking portion 12a is plastically deformed by driving a tool into the plastic locking portion 12a so as to protrude in a long horizontally arcuate cross-sectional shape in a direction intersecting the axial direction. The shape of the plastically clamped portion 13a is plastically deformed by driving a tool into the portion 13a so as to protrude in an axially elongated arcuate cross-section.
As a result, when the core C is inserted into the through hole 11 of the cylindrical member 1 to a fixed position in the first writing instrument adapter A1, the plastic locking portion 12a of the engagement convex portion 12 and the pressing convex portion 13 The core C is positioned and integrally attached at the plastic clamping portion 13a. In this attached state, the first writing instrument adapter A1 and the core C are integrated into a replacement core AC. The total length L of the replacement core AC shown in FIG. The length is the same as the total length L of the center core D for the shaft cylinder shown in FIG. 1(c).
Although not shown as a modification of the engagement convex portion 12 and the pressing convex portion 13, a plurality of plastic locking portions 12a may be arranged at predetermined intervals in the circumferential direction, and one or more plastic clamping portions 13a may be arranged in the circumferential direction. Changes such as arranging three or more at predetermined intervals are possible. Furthermore, it is also possible to change the shape of the plastic locking portion 12a and the plastic clamping portion 13a to a shape other than the illustrated example.

次に係合凸部１２及び押圧凸部１３の他の例（第二実施形態）として図３（ａ）（ｂ）に示される場合には、筒状部材１に複数組の係合凸部１２と複数組の押圧凸部１３が設けられた複数サイズの中芯Ｃと対応可能な第二の筆記具用アダプタＡ２である。
図示例では、筒状部材１に対し、複数サイズの中芯Ｃとして、短尺で大径な第一中芯Ｃ′に対応する第一塑性係止部位１２ａ′及び第一塑性挟持部位１３ａ′と、長尺で小径な第二中芯Ｃ″に対応する第二塑性係止部位１２ａ″及び第二塑性挟持部位１３ａ″と、を合計二組ずつ配備している。
つまり、筒状部材１の基端側において第二塑性係止部位１２ａ″及び第二塑性挟持部位１３ａ″の配設位置は、長尺で小径な第二中芯Ｃ″と対応するように、第一塑性係止部位１２ａ′及び第一塑性挟持部位１３ａ′の配設位置よりも、短尺で大径な第一中芯Ｃ′と長尺で小径な第二中芯Ｃ″の全長差分だけ軸方向奥側にずれた位置に設定される。 Next, in the case shown in FIGS. 3(a) and 3(b) as another example (second embodiment) of the engagement protrusion 12 and the pressing protrusion 13, a plurality of sets of engagement protrusions are provided on the cylindrical member 1. 12 and a plurality of sets of pressing protrusions 13 are provided, and the second writing instrument adapter A2 is compatible with a plurality of sizes of cores C.
In the illustrated example, the cylindrical member 1 is provided with a first plastic locking portion 12a' and a first plastic clamping portion 13a' corresponding to a short and large-diameter first core C' as the center core C of multiple sizes. A total of two sets of second plastic locking portions 12a'' and second plastic clamping portions 13a'' corresponding to the long and small diameter second core C'' are provided.
That is, on the proximal end side of the cylindrical member 1, the second plastic locking portion 12a'' and the second plastic clamping portion 13a'' are arranged so as to correspond to the long and small diameter second central core C''. Only the difference in total length between the first center core C', which is shorter and larger in diameter, and the second center core C'', which is longer and smaller in diameter, than the arrangement positions of the first plastic locking part 12a' and the first plastic clamping part 13a'. It is set at a position shifted toward the back in the axial direction.

第一塑性係止部位１２ａ′の突出量（径方向へ突出した高さ）は、長尺で小径な第二中芯Ｃ″の基端縁Ｃ２″と当接しないように第二塑性係止部位１２ａ″の突出量よりも小さく形成され、第二塑性係止部位１２ａ″の突出量は、長尺で小径な第二中芯Ｃ″の基端縁Ｃ２″と確実に当接するように第一塑性係止部位１２ａ′の突出量よりも大きく突出するように形成される。
第一塑性挟持部位１３ａ′の突出量（径方向へ突出した高さ）は、長尺で小径な第二中芯Ｃ″の基端外周面Ｃ３″と当接しないように第二塑性挟持部位１３ａ″の突出量よりも小さく形成され、第二塑性挟持部位１３ａ″の突出量は、長尺で小径な第二中芯Ｃ″の基端外周面Ｃ３″と確実に圧接するように第一塑性挟持部位１３ａ′の突出量よりも大きく突出するように形成される。
これにより、第二の筆記具用アダプタＡ２において筒状部材１の貫通孔１１に対し、短尺で大径な第一中芯Ｃ′又は長尺で小径な第二中芯Ｃ″が定位置まで挿入されると、第一塑性係止部位１２ａ′又は第二塑性係止部位１２ａ″や第一塑性挟持部位１３ａ′又は第二塑性挟持部位１３ａ″で第一中芯Ｃ′又は第二中芯Ｃ″を位置決めして一体的に取り付けられる。この取り付け状態では、第二の筆記具用アダプタＡ２と第一中芯Ｃ′が一体化して第一交換芯AC′となり、第二の筆記具用アダプタＡ２と第二中芯Ｃ″が一体化して第二交換芯AC″となる。図３（ａ）に示される第一交換芯AC′の全長Ｌと、図３（ｂ）に示される第二交換芯ACの全長Ｌは、図３（ｃ）に示される軸筒専用中芯Ｄの全長Ｌと同じ長さになる。
また、それ以外の係合凸部１２及び押圧凸部１３の変形例として図示しないが、筒状部材１に三組以上の係合凸部１２と三組以上の押圧凸部１３を設けるように変更することも可能である。 The amount of protrusion (the height of protrusion in the radial direction) of the first plastic locking portion 12a' is such that the second plastic locking portion 12a' does not come into contact with the proximal edge C2'' of the long and small diameter second core C''. The protrusion amount of the second plastic locking portion 12a'' is formed to be smaller than the protrusion amount of the second plastic locking portion 12a'', and the protrusion amount of the second plastic locking portion 12a'' is set to be smaller than the protrusion amount of the second plastic locking portion 12a'' so that the proximal end edge C2'' of the elongated and small diameter second core C'' reliably abuts. It is formed to protrude more than the amount of protrusion of the one plastic locking portion 12a'.
The amount of protrusion (the height of the protrusion in the radial direction) of the first plastic clamping part 13a' is such that the second plastic clamping part 13a' does not come into contact with the base end outer peripheral surface C3'' of the long and small diameter second core C''13a'', and the protrusion amount of the second plastic clamping portion 13a'' is formed to be smaller than the protrusion amount of the second plastic clamping portion 13a''. It is formed to protrude more than the amount of protrusion of the plastic clamping portion 13a'.
As a result, in the second writing instrument adapter A2, the short and large diameter first core C' or the long and small diameter second core C'' is inserted into the through hole 11 of the cylindrical member 1 until it reaches the fixed position. Then, the first center core C′ or the second center core C ” can be positioned and installed integrally. In this attached state, the second writing instrument adapter A2 and the first core C' are integrated to form the first replacement core AC', and the second writing instrument adapter A2 and the second core C'' are integrated to become the first core AC'. Two exchange core AC''. The total length L of the first replacement core AC' shown in FIG. 3(a) and the total length L of the second replacement core AC shown in FIG. 3(b) are the same as those shown in FIG. 3(c). The length is the same as the total length L of D.
Although not shown as a modification of the other engaging protrusions 12 and pressing protrusions 13, three or more sets of engaging protrusions 12 and three or more sets of pressing protrusions 13 are provided on the cylindrical member 1. It is also possible to change.

そして、筒状部材１の取付部１４は、筒状部材１の基端面に形成され、筆記具Ｂの芯固定部Ｂ３と軸方向へ係合して筒状部材１を定位置に位置決めする。
取付部１４の具体例として図１～図３に示される場合には、筆記具Ｂの芯固定部Ｂ３となるノック式の芯操作機構が、筒状部材１の取付部１４と係合している。
筒状部材１の受け面１５は、筆記具Ｂがノック式ボールペンのように中芯Ｃの先端部（ボール部）Ｃ４，Ｃ４′，Ｃ４″を軸筒Ｂ１の先端開口Ｂ２から出し入れ可能に支持する場合に、軸筒Ｂ１の先端内面との間に弾性部材Ｂ４を介装するための係止部である。
受け面１５は、貫通孔１１の先端側開口１１ａを囲む筒状部材１の先端面に形成され、筒状部材１の貫通孔１１に中芯Ｃが定位置まで挿入された状態で、中芯Ｃの外側へ段状に突出する。
受け面１５の具体例として図１～図３に示される場合には、軸筒専用中芯Ｄとなるスプリング止め付きのボールペンリフィルの突起Ｄ１と対応した位置に、受け面１５が配置されるように設定している。受け面１５と軸筒Ｂ１の先端内面との間にスプリングなどのバネ材からなる弾性部材Ｂ４を介装することで、中芯Ｃの先端部（ボール部）Ｃ４，Ｃ４′，Ｃ４″を軸筒Ｂ１の先端開口Ｂ２から出し入れ可能に支持している。
また、それ以外の取付部１４及び受け面１５の変形例として図示しないが、図示例以外の形状や構造に変更することも可能である。 The attachment portion 14 of the cylindrical member 1 is formed on the base end surface of the cylindrical member 1, and engages with the lead fixing portion B3 of the writing instrument B in the axial direction to position the cylindrical member 1 at a fixed position.
In the case shown in FIGS. 1 to 3 as specific examples of the attachment portion 14, a knock-type lead operating mechanism serving as the lead fixing portion B3 of the writing instrument B is engaged with the attachment portion 14 of the cylindrical member 1. .
The receiving surface 15 of the cylindrical member 1 supports the tip portions (ball portions) C4, C4', and C4'' of the core C of the writing instrument B such that they can be taken in and out from the tip opening B2 of the barrel B1 like a knock-type ballpoint pen. In this case, this is a locking portion for interposing the elastic member B4 between the inner surface of the tip of the shaft cylinder B1.
The receiving surface 15 is formed on the distal end surface of the cylindrical member 1 surrounding the distal opening 11a of the through hole 11, and when the core C is inserted into the through hole 11 of the cylindrical member 1 to a fixed position, It protrudes stepwise to the outside of C.
In the case shown in FIGS. 1 to 3 as specific examples of the receiving surface 15, the receiving surface 15 is arranged at a position corresponding to the protrusion D1 of the ballpoint pen refill with a spring stopper, which is the center core D for the barrel. It is set to . By interposing an elastic member B4 made of a spring material such as a spring between the receiving surface 15 and the inner surface of the tip of the shaft cylinder B1, the tip portion (ball portion) C4, C4', C4'' of the center core C is It is supported so that it can be taken in and out from the tip opening B2 of the cylinder B1.
Further, although not shown as a modification of the mounting portion 14 and the receiving surface 15, it is also possible to change the shape or structure to a shape or structure other than the illustrated example.

筒状部材１の挿入側標識１６は、使用者が誤って貫通孔１１に対し中芯Ｃを逆向きで挿入しないように喚起するための目印である。
貫通孔１１の先端側開口１１ａと反対側の筒状部材１の基端側は、係合凸部１２が突出形成されているため、貫通孔１１の先端側開口１１ａと逆の基端側開口１１ｂからは中芯Ｃが挿入できない。これを防止するため、筒状部材１の先端側外面に挿入側標識１６が配備されている。
挿入側標識１６の具体例として図１～図３に示される場合には、筒状部材１の先端側外面に環状凹溝を形成している。
また、それ以外の挿入側標識１６の変形例として図示しないが、図示例以外の形状や構造に変更することも可能である。 The insertion side mark 16 of the cylindrical member 1 is a mark to remind the user not to accidentally insert the core C into the through hole 11 in the wrong direction.
The proximal end side of the cylindrical member 1 opposite to the distal opening 11 a of the through hole 11 has the engagement convex portion 12 protrudingly formed, so that the proximal opening opposite to the distal opening 11 a of the through hole 11 is formed. The core C cannot be inserted from 11b. In order to prevent this, an insertion side marker 16 is provided on the outer surface of the distal end side of the cylindrical member 1.
In the case shown in FIGS. 1 to 3 as specific examples of the insertion side marker 16, an annular groove is formed on the outer surface of the distal end side of the cylindrical member 1.
Further, although not shown as a modification of the insertion side marker 16, it is also possible to change the shape and structure to those other than the illustrated example.

このような本発明の実施形態に係る筆記具用アダプタＡによると、筒状部材１の貫通孔１１に中芯Ｃの基端部Ｃ１が挿入され、中芯Ｃの基端縁Ｃ２に係合凸部１２の塑性係止部位１２ａ，１２ａ′，１２ａ″を当接して係合させることにより、貫通孔１１内で中芯Ｃが軸方向（芯挿入方向）へ移動不能に位置決めされる。
これに加えて、中芯Ｃの基端外周面Ｃ３に押圧凸部１３の塑性挟持部位１３ａ，１３ａ′，１３ａ″を圧接して挟み込むことにより、貫通孔１１内で中芯Ｃが径方向及び軸方向（芯抜け方向）へ移動不能に位置決めされる。
このため、筒状部材１と中芯Ｃが一体化されて交換芯ACとなる。交換芯ACの全長Ｌは、筒状部材１の軸方向長さと、筒状部材１から突出した中芯Ｃの先端部Ｃ４まで長さとの和がとなる。
これにより、中芯Ｃの長さサイズが変化しても、塑性加工により塑性係止部位１２ａ，１２ａ′，１２ａ″の位置を軸方向へ調整するだけで、交換芯ACの全体長さＬが特定サイズに設定可能となる。また中芯Ｃの径サイズが変化しても、塑性加工により塑性挟持部位１３ａ，１３ａ′，１３ａ″の突出量を径方向へ調整するだけで、交換芯ACの全体長さＬが特定サイズに設定可能となる。
したがって、簡単な構造で中芯Ｃの長さサイズや径サイズが変化しても係合凸部１２や押圧凸部１３の設定変更のみで対応できて製作途中の筒状部材１の共用化を図ることができる。
その結果、中芯Ｃの長さサイズや径サイズが異なる度に専用サイズのアダプタを製作し直すことが必要な従来のものに比べ、係合凸部１２や押圧凸部１３の調整のみで中芯Ｃの長さサイズ変化や径サイズ変化と関係なく多種類の中芯Ｃを、特定サイズの軸筒専用中芯Ｄに設定できて、利便性に優れるとともに、製品管理が容易になるだけでなくコストの低減化も図れる。 In the writing instrument adapter A according to this embodiment of the present invention, the base end C1 of the core C is inserted into the through hole 11 of the tubular member 1, and the plastic locking portions 12a, 12a', 12a" of the engaging protrusion 12 abut and engage with the base end edge C2 of the core C, thereby positioning the core C within the through hole 11 so that it cannot move in the axial direction (core insertion direction).
In addition, by pressing and clamping the plastic clamping portions 13a, 13a', 13a" of the pressing protrusion 13 against the base end outer peripheral surface C3 of the core C, the core C is positioned within the through hole 11 so as to be immovable in the radial and axial directions (core removal direction).
As a result, the cylindrical member 1 and the core C are integrated to form the replacement core AC. The total length L of the replacement core AC is the sum of the axial length of the cylindrical member 1 and the length to the tip C4 of the core C protruding from the cylindrical member 1.
As a result, even if the length size of core C changes, the overall length L of replacement core AC can be set to a specific size simply by adjusting the positions of plastic locking portions 12a, 12a', 12a" in the axial direction through plastic processing. Furthermore, even if the diameter size of core C changes, the overall length L of replacement core AC can be set to a specific size simply by adjusting the protrusion amount of plastic clamping portions 13a, 13a', 13a" in the radial direction through plastic processing.
Therefore, even if the length or diameter of the core C changes with a simple structure, it can be accommodated by simply changing the settings of the engaging protrusions 12 and the pressing protrusions 13, and the cylindrical member 1 in the middle of being manufactured can be shared.
As a result, compared to the conventional system which required the manufacture of a dedicated adapter each time the length or diameter of the core C changed, by simply adjusting the engaging protrusions 12 and the pressing protrusions 13, a wide variety of cores C can be set to dedicated cores D for a specific size of barrel, regardless of changes in the length or diameter of the core C, which is highly convenient, facilitates product management, and reduces costs.

特に、筒状部材１が金属製チューブであり、塑性係止部位１２ａ，１２ａ′，１２ａ″及び押圧凸部１３の塑性挟持部位１３ａ，１３ａ′，１３ａ″を工具の打ち込みにより部分的に塑性変形させることが好ましい。
この場合には、工具の打ち込み具合によって、塑性係止部位１２ａ，１２ａ′，１２ａ″及び塑性挟持部位１３ａ，１３ａ′，１３ａ″の塑性変形が容易に調整可能になる。
したがって、中芯Ｃの長さサイズや径サイズが変化しても簡単な加工調整で係合凸部１２や押圧凸部１３を設定変更することができる。
その結果、多種類の中芯Ｃと容易にできてコストの大幅な低減化が図れる。 In particular, the cylindrical member 1 is a metal tube, and the plastic locking parts 12a, 12a', 12a'' and the plastic clamping parts 13a, 13a', 13a'' of the pressing convex part 13 are partially plastically deformed by driving the tool. It is preferable to let
In this case, the plastic deformation of the plastic locking parts 12a, 12a', 12a'' and the plastic clamping parts 13a, 13a', 13a'' can be easily adjusted depending on the driving condition of the tool.
Therefore, even if the length size and diameter size of the core C change, the settings of the engaging convex portion 12 and the pressing convex portion 13 can be changed by simple processing adjustments.
As a result, many types of cores C can be easily produced, and costs can be significantly reduced.

さらに、筒状部材１の先端に筆記具Ｂの弾性部材Ｂ４と軸方向へ当接する受け面１５を有することが好ましい。
この場合には、筒状部材１の受け面１５と軸筒Ｂ１の先端内面との間に弾性部材Ｂ４を介装することにより、中芯Ｃの先端部Ｃ４，Ｃ４′，Ｃ４″が軸筒Ｂ１の先端開口Ｂ２から出し入れ可能に支持される。
したがって、筒状部材１の先端を中芯Ｃの出し入れ用の弾性部材Ｂ４の受け面１５として利用することができる。
その結果、中芯Ｃがスプリング止め付きのリフィルでなくても、ノック式の筆記具Ｂとして利用できて、利便性に優れる。 Furthermore, it is preferable that the tip of the cylindrical member 1 has a receiving surface 15 that comes into contact with the elastic member B4 of the writing instrument B in the axial direction.
In this case, by interposing the elastic member B4 between the receiving surface 15 of the cylindrical member 1 and the inner surface of the tip of the shaft tube B1, the tip portions C4, C4', C4'' of the center core C are It is supported so that it can be put in and taken out from the tip opening B2 of B1.
Therefore, the tip of the cylindrical member 1 can be used as the receiving surface 15 of the elastic member B4 for inserting and removing the core C.
As a result, even if the core C is not a refill with a spring stopper, it can be used as a knock-type writing instrument B, providing excellent convenience.

また、筒状部材１の先端側外面に中芯Ｃの挿入側標識１６を有することが好ましい。
この場合には、使用者が挿入側標識１６を認識することで、係合凸部１２が突出形成されていない筒状部材１の先端側（貫通孔１１の先端側開口１１ａ）から、中芯Ｃの基端部Ｃ１を正しく挿入するように誘導可能なる。
したがって、筒状部材１に対する中芯Ｃの挿入時における使用者の誤操作を防止することができる。
その結果、専門知識がない使用者でも中芯Ｃの挿入を正しく行うことができ、利便性に優れる。 It is also preferable that the cylindrical member 1 has an insertion side marker 16 for the core C on the outer surface at the tip side.
In this case, by recognizing the insertion side marker 16, the user can be guided to correctly insert the base end C1 of the core C from the tip side of the tubular member 1 (the tip side opening 11a of the through hole 11) where the engagement protrusion 12 is not formed protrudingly.
Therefore, it is possible to prevent a user from making an erroneous operation when inserting the core C into the tubular member 1 .
As a result, even a user without specialized knowledge can correctly insert the core C, providing excellent convenience.

なお、前示の実施形態（第一実施形態及び第二実施形態）において図示例では、筆記具Ｂが軸筒Ｂ１内に中芯Ｃとしてボールペンリフィルを装着したボールペンである場合を示したが、これに限定されず、筆記具用アダプタＡとの組み合わせで中芯Ｃとして１本のシャーペンリフィールを装着した単色のシャープペンシルや、１本又は複数本のシャーペンリフィールを含むように装着した多色のボールペンであってもよい。
この場合においても、前述した第一実施形態や第二実施形態と同様な作用と利点が得られる。 In addition, in the illustrated example in the embodiments described above (the first embodiment and the second embodiment), the case where the writing instrument B is a ballpoint pen with a ballpoint pen refill installed as the core C in the barrel B1 is shown. Not limited to, single-color mechanical pencils equipped with one mechanical pencil refill as the center core C in combination with writing instrument adapter A, and multi-colored ballpoint pens equipped with one or more mechanical pencil refills. There may be.
In this case as well, the same effects and advantages as in the first and second embodiments described above can be obtained.

Ａ筆記具用アダプタ１筒状部材
１１貫通孔１２係合凸部
１２ａ，１２ａ′，１２ａ″ 塑性係止部位
１３押圧凸部
１３ａ，１３ａ′，１３ａ″ 塑性挟持部位
１５受け面１６挿入側標識
Ｂ筆記具Ｂ１軸筒
Ｂ４弾性部材Ｃ中芯
Ｃ１基端部Ｃ２基端縁
Ｃ３基端外周面 A Writing instrument adapter 1 Cylindrical member 11 Through hole 12 Engagement convex portion 12a, 12a', 12a'' Plastic locking portion 13 Pressing convex portion 13a, 13a', 13a'' Plastic clamping portion 15 Receiving surface 16 Insertion side marker B Writing instrument B1 shaft cylinder
B4 Elastic member C Central core C1 Proximal end C2 Proximal edge C3 Proximal outer peripheral surface

Claims

A writing instrument adapter that is attached to a replaceable core that is installed in the barrel of a writing instrument,
a cylindrical member having a larger diameter than the outer diameter of the core;
a through hole formed throughout the interior of the cylindrical member and into which the proximal end of the core is inserted;
an engaging convex portion provided on a portion of the cylindrical member in the axial direction, facing the proximal edge of the core inserted into the through hole;
a pressing convex portion provided on a part of the circumferential direction of the cylindrical member facing the outer circumferential surface of the proximal end of the core inserted into the through hole;
The engagement convex portion has a plastic locking portion formed such that a portion of the through hole in the axial direction protrudes toward the proximal edge of the center core through plastic deformation , and the plastic locking portion is , abutting the proximal edge with the core inserted into the through hole;
The pressing convex part has a plastic clamping part formed such that a part of the circumferential direction of the through hole protrudes toward the outer circumferential surface of the proximal end of the core through plastic deformation, and the plastic clamping part is A writing instrument adapter , wherein the core is pressed against the outer peripheral surface of the proximal end in a state where the core is inserted into the through hole .

The cylindrical member is a metal tube, and the plastic locking portion of the engagement convex portion and the plastic clamping portion of the pressing convex portion are partially plastically deformed by driving with a tool. The writing instrument adapter according to claim 1.

3. The writing instrument adapter according to claim 1, wherein the cylindrical member has a receiving surface at a distal end thereof that comes into contact with the elastic member of the writing instrument in the axial direction.

4. The writing instrument adapter according to claim 1, wherein the cylindrical member has an insertion side marker for the core on the outer surface of the distal end side of the cylindrical member.