JP7448420B2 - removable writing instrument - Google Patents

removable writing instrument Download PDF

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JP7448420B2
JP7448420B2 JP2020096706A JP2020096706A JP7448420B2 JP 7448420 B2 JP7448420 B2 JP 7448420B2 JP 2020096706 A JP2020096706 A JP 2020096706A JP 2020096706 A JP2020096706 A JP 2020096706A JP 7448420 B2 JP7448420 B2 JP 7448420B2
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pusher
biasing member
writing instrument
hooked
writing
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JP2021187109A (en
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之博 月岡
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Zebra Co Ltd
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Zebra Co Ltd
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Description

本発明は、選択された押子の操作により筆記部を出没する出没式筆記具に関するものである。 TECHNICAL FIELD The present invention relates to a retractable writing instrument whose writing portion appears and retracts by operating a selected pusher.

従来、この種の発明には、例えば特許文献１に記載されるように、軸筒と、この軸筒内にスライド可能に係合するとともに該軸筒の外周面から露出して周方向に複数並ぶ押子と、軸筒内で複数の前記押子にそれぞれ接続された筆記芯と、筆記芯毎に環状に装着されて前記押子及び前記筆記芯を後方へ付勢する圧縮コイルバネとを備え、複数の前記押子の何れかをスライドさせる操作により該押子に接続された筆記芯の筆記部を軸筒前端から突出させるようにした筆記具がある。
ところで、このような筆記具によれば、筆記芯の外周に圧縮コイルバネを装着するスペースを要するため、軸筒径が大きくなってしまう傾向がある。
そこで、例えば特許文献２に記載の発明では、前記圧縮コイルバネに換えて、押子よりも後側に引張コイルバネを設け、この引張コイルバネによって押子を後方へ引っ張るようにしている。 Conventionally, in this type of invention, as described in Patent Document 1, for example, a shaft cylinder and a plurality of shafts that are slidably engaged in the shaft cylinder and exposed from the outer circumferential surface of the shaft cylinder in the circumferential direction. It includes pushers lined up, a writing lead connected to each of the plurality of pushers in a shaft cylinder, and a compression coil spring attached to each writing lead in an annular shape and urging the pusher and the writing lead backward. There is a writing instrument in which a writing portion of a writing lead connected to the pusher is caused to protrude from the front end of the barrel by sliding any one of the plurality of pushers.
By the way, according to such a writing instrument, since a space for mounting a compression coil spring on the outer periphery of the writing lead is required, the barrel diameter tends to become large.
Therefore, in the invention described in Patent Document 2, for example, instead of the compression coil spring, a tension coil spring is provided behind the pusher, and the pusher is pulled rearward by this tension coil spring.

特開２００５－１１１８７６号公報Japanese Patent Application Publication No. 2005-111876 特開２０１６－０９３９７６号公報Japanese Patent Application Publication No. 2016-093976

しかしながら、後者従来技術では、製造時に小径の引張コイルバネを押子に掛止する作業が困難である。 However, in the latter conventional technique, it is difficult to hook a small-diameter tension coil spring to a pusher during manufacturing.

このような課題に鑑みて、本発明は、以下の構成を具備するものである。
軸筒と、前記軸筒の周壁に挿通されて進退可能な押子と、前記押子に接続された筆記芯と、前記押子及び前記筆記芯を後方へ付勢する付勢部材とを備え、前記押子を前進させる操作により前記筆記芯を前記軸筒の前端から突出させるようにした出没式筆記具であって、前記付勢部材は、引張バネであり、その前端側を前記押子に掛止するとともに後端側を不動部位に掛止し、前記押子には、組立時に後方から挿入される前記付勢部材を自動的に掛止する自動掛止部が内在していることを特徴とする出没式筆記具。 In view of such problems, the present invention includes the following configuration.
A shaft tube, a pusher inserted into a peripheral wall of the shaft tube and movable back and forth, a writing lead connected to the pusher, and an urging member that urges the pusher and the writing lead backward. , a retractable writing instrument in which the writing lead is made to protrude from the front end of the barrel by an operation of advancing the pusher, wherein the biasing member is a tension spring, and the biasing member is a tension spring, and the front end thereof is attached to the pusher. At the same time, the rear end side is latched to an immovable part, and the pusher includes an automatic latching part that automatically latches the biasing member inserted from the rear during assembly. Features a removable writing instrument.

本発明は、以上説明したように構成されているので、付勢部材を押子に掛止する作業を容易化することができる。 Since the present invention is configured as described above, it is possible to facilitate the work of hooking the biasing member to the pusher.

本発明に係る出没式筆記具の一例を示す半断面である。1 is a half cross section showing an example of a retractable writing instrument according to the present invention. 同出没式筆記具の要部を拡大して示す半断面図である。It is a half sectional view which expands and shows the principal part of the retractable writing instrument. 押子に付勢部材を接続する手順を（ａ）～（ｂ）に順次に示す図であり、押子のみ断面図で示している。FIGS. 3A and 3B are diagrams sequentially showing a procedure for connecting a biasing member to a pusher, and only the pusher is shown in a cross-sectional view. 自動掛止部の一例を示す拡大図であり、押子を断面で示している。It is an enlarged view which shows an example of an automatic latching part, and shows a pusher in cross section.

本実施の形態では、以下の特徴を開示している。
第１の特徴は、軸筒と、前記軸筒の周壁に挿通されて進退可能な押子と、前記押子に接続された筆記芯と、前記押子及び前記筆記芯を後方へ付勢する付勢部材とを備え、前記押子を前進させる操作により前記筆記芯を前記軸筒の前端から突出させるようにした出没式筆記具であって、前記付勢部材は、引張バネであり、その前端側を前記押子に掛止するとともに後端側を不動部位に掛止し、前記押子には、組立時に後方から挿入される前記付勢部材を自動的に掛止する自動掛止部が設けられている（図１～図４参照）。 This embodiment discloses the following features.
The first feature is a barrel, a pusher that is inserted into the peripheral wall of the barrel and can move forward and backward, a writing lead connected to the pusher, and a pusher that urges the pusher and the writing lead backward. A retractable writing instrument comprising a biasing member, the writing core being made to protrude from the front end of the barrel by an operation of advancing the pusher, wherein the biasing member is a tension spring; The side is hooked to the pusher and the rear end side is hooked to an immovable part, and the pusher has an automatic hooking part that automatically hooks the biasing member inserted from the rear during assembly. (See Figures 1 to 4).

第２の特徴として、前記付勢部材の前端側には、掛合部が設けられ、前記自動掛止部は、前記掛合部を掛止する被掛止部と、組立時に後方から挿入される前記掛合部を前記被掛止部によって掛止可能な位置まで案内するガイド部とを有する（図４参照）。 As a second feature, a hooking portion is provided on the front end side of the biasing member, and the automatic hooking portion is connected to a hooked portion that hooks the hooking portion, and a hooked portion that is inserted from the rear during assembly. It has a guide part that guides the engaging part to a position where it can be latched by the latched part (see FIG. 4).

第３の特徴として、前記被掛止部は、懐部分を前方へ向けたフック状に形成され、前記ガイド部は、前進する前記掛合部の進行方向を曲げて前記被掛止部の懐部分へ導く（図４参照）。 As a third feature, the hooked portion is formed in a hook shape with the pocket portion facing forward, and the guide portion bends the advancing direction of the hooking portion to move the pocket portion of the hooked portion forward. (See Figure 4).

第４の特徴として、前記押子の後端側には、前記付勢部材を前後方向へ貫通する付勢部材挿通部が設けられ、前記被掛止部は、前記付勢部材挿通部よりも前側で押子外に露出している（図１～図４参照）。 As a fourth feature, a biasing member insertion portion that penetrates the biasing member in the front-rear direction is provided on the rear end side of the pusher, and the latched portion is larger than the biasing member insertion portion. It is exposed outside the presser on the front side (see Figures 1 to 4).

＜具体的実施態様＞
次に、上記特徴を有する具体的な実施態様について、図面に基づいて詳細に説明する。
本明細書中、軸筒軸方向とは軸筒の中心線が延びる方向を意味し、軸筒周方向とは軸筒の外周を回る方向を意味する。また、「前」とは、軸筒軸方向の一方側であって筆記部が突出する方向を意味し、「後」とは、前記一方側に対する逆方向側を意味する。
また、軸筒径方向とは軸筒の中心線に直交する軸筒の直径方向を意味し、軸筒径方向外側とは軸筒径方向に沿って軸筒中心から離れる方向を意味し、軸筒径方向内側とは軸筒径方向に沿って軸筒中心に向かう方向を意味する。 <Specific embodiment>
Next, a specific embodiment having the above characteristics will be described in detail based on the drawings.
In this specification, the axial direction of the barrel means the direction in which the center line of the barrel extends, and the circumferential direction of the barrel means the direction around the outer periphery of the barrel. Furthermore, the term "front" refers to one side in the axial direction of the barrel and the direction in which the writing section protrudes, and the term "rear" refers to the side opposite to the one side.
In addition, the radial direction of the shaft cylinder means the diametric direction of the shaft cylinder perpendicular to the center line of the shaft cylinder, and the outer side of the shaft cylinder in the radial direction means the direction away from the center of the shaft cylinder along the radial direction of the shaft cylinder. The inner side in the radial direction of the cylinder means the direction toward the center of the cylinder along the radial direction of the cylinder.

この出没式筆記具Ａは、軸筒１０と、軸筒１０後端側の周壁に径方向へ挿通されるとともに該周壁に沿って進退可能な複数の押子２０と、軸筒１０内で複数の押子２０にそれぞれ接続された複数の筆記芯３０と、複数の押子２０及び筆記芯３０をそれぞれ後方へ付勢する付勢部材４０とを備え、選択された押子２０を前進させる操作により、この前進した押子２０に対応する筆記芯３０の筆記部３１を軸筒１０の前端から突出させる。 This retractable writing instrument A includes a barrel 10, a plurality of pushers 20 that are inserted into the peripheral wall on the rear end side of the barrel 10 in the radial direction and are movable back and forth along the peripheral wall, and a plurality of pushers 20 inside the barrel 10. Equipped with a plurality of writing leads 30 each connected to the pusher 20, and a biasing member 40 that urges the plurality of pushers 20 and the writing lead 30 backward, by an operation of advancing a selected pusher 20. , the writing part 31 of the writing core 30 corresponding to this advanced pusher 20 is made to protrude from the front end of the shaft tube 10.

軸筒１０は、前後方向へわたる略円筒状に形成され、前軸１１と、この前軸１１の後端側に螺合接続された後軸１２とから構成される。
なお、図示例以外の態様としては、この軸筒１０を単一の部材から形成したり、三以上の部材から形成することも可能である。 The shaft cylinder 10 is formed into a substantially cylindrical shape extending in the front-rear direction, and is composed of a front shaft 11 and a rear shaft 12 that is threadedly connected to the rear end side of the front shaft 11.
In addition, as an aspect other than the illustrated example, it is also possible to form this shaft cylinder 10 from a single member or from three or more members.

前軸１１は、硬質合成樹脂材料から略円筒状に形成され、その前端側に、先口部１１ａを有する。先口部１１ａは、前端を開口した先細筒状に形成される。 The front shaft 11 is made of a hard synthetic resin material and has a substantially cylindrical shape, and has a tip portion 11a at its front end. The tip portion 11a is formed into a tapered cylindrical shape with an open front end.

後軸１２は、硬質合成樹脂材料から前後方向へわたる略円筒状に成形される。 The rear shaft 12 is formed from a hard synthetic resin material into a substantially cylindrical shape extending in the front-rear direction.

後軸１２の周壁の後端側には、押子２０を嵌め合わせて前後にスライドさせる押子ガイド部１２ｂが、周方向に間隔を置いて複数設けられる。
各押子ガイド部１２ｂは、前後方向へ長尺状に延設され、後軸１２の周壁を径方向に貫通している。この押子ガイド部１２ｂの後端部は、後方向きに開口している。 On the rear end side of the peripheral wall of the rear shaft 12, a plurality of pusher guide portions 12b into which the pusher 20 is fitted and slid back and forth are provided at intervals in the circumferential direction.
Each pusher guide portion 12b extends in an elongated manner in the front-rear direction, and passes through the peripheral wall of the rear shaft 12 in the radial direction. The rear end portion of this pusher guide portion 12b is open rearward.

また、後軸１２の内周面には、前進して軸筒内へ沈み込んだ際の押子２０を係止するための段状の被係止部１２ｅが設けられる。 Furthermore, a stepped locked portion 12e is provided on the inner circumferential surface of the rear shaft 12 for locking the pusher 20 when it moves forward and sinks into the shaft cylinder.

後軸１２における押子ガイド部１２ｂよりも後側には、縮径されて後方へ突出した嵌合筒部１２ｃが設けられる。
この嵌合筒部１２ｃには、尾栓１４が環状に嵌め合わせられる。尾栓１４は後方を底部とした有底筒状に形成される。 A fitting cylindrical portion 12c having a reduced diameter and protruding rearward is provided on the rear shaft 12 on the rear side of the pusher guide portion 12b.
The tail plug 14 is fitted into the fitting cylinder portion 12c in an annular manner. The tail plug 14 is formed into a cylindrical shape with a bottom at the rear.

また、嵌合筒部１２ｃの周壁には、付勢部材４０を掛止するための被掛止部１２ｄが、押子ガイド部１２ｂ毎に対応するように、周方向に所定間隔を置いて複数設けられる。これら複数の嵌合筒部１２ｃは、図２に示すように、尾栓１４内の空間に位置する。
各被掛止部１２ｄは、嵌合筒部１２ｃから径方向外側へ突出して突端側を後方へ向けたフック状に形成され、後軸１２に一体に設けられている。 Further, on the peripheral wall of the fitting cylinder portion 12c, a plurality of hooked portions 12d for hooking the biasing member 40 are arranged at predetermined intervals in the circumferential direction so as to correspond to each pusher guide portion 12b. provided. These plurality of fitting cylinder portions 12c are located in a space within the tail plug 14, as shown in FIG.
Each of the hooked portions 12d is formed in the shape of a hook, protruding radially outward from the fitting cylinder portion 12c, with its tip facing rearward, and is integrally provided on the rear shaft 12.

押子２０は、硬質合成樹脂材料から前後方向へわたる長尺状に形成され、その前端側に筆記芯３０の後端部を嵌合し、後端側に後述する付勢部材４０を内在している。
この押子２０は、操作部２１が前方へ押される操作により前進した際に軸筒内へ沈み込んで、後端側の係止部２２を、後軸１２内の段状の被係止部１２ｅに係止する。そして、この係止状態において、他の押子が前進した際には、この前進した押子に当接されることで、前記係止状態を解除する。 The pusher 20 is made of a hard synthetic resin material and has an elongated shape extending in the front-rear direction, and the rear end of the writing core 30 is fitted to the front end of the pusher 20. ing.
This pusher 20 sinks into the shaft cylinder when the operating portion 21 moves forward by an operation of pushing forward, and locks the locking portion 22 on the rear end side into a stepped locked portion within the rear shaft 12. 12e. In this locked state, when another pusher moves forward, the locked state is released by coming into contact with this advanced pusher.

この押子２０の後端側には、組立時に後方から挿入される付勢部材４０を自動的に掛止する自動掛止部２３が設けられている。
自動掛止部２３は、付勢部材４０を前後方向へ貫通する付勢部材挿通部２３ａと、付勢部材挿通部２３ａよりも前側で押子外に露出した被掛止部２３ｂと、付勢部材４０の前側掛合部４２を被掛止部２３ｂによって掛止可能な位置まで案内するガイド部２３ｃとを有する。 An automatic latching portion 23 is provided on the rear end side of the pusher 20 for automatically latching the biasing member 40 inserted from the rear during assembly.
The automatic latching portion 23 includes a biasing member insertion portion 23a that penetrates the biasing member 40 in the front-back direction, a latched portion 23b exposed outside the pusher in front of the biasing member insertion portion 23a, and a biasing member insertion portion 23b that is exposed outside the pusher in front of the biasing member insertion portion 23a. It has a guide part 23c that guides the front side engaging part 42 of the member 40 to a position where it can be latched by the latched part 23b.

詳細に説明すれば、押子２０の長手方向の途中箇所には、径方向内側を向く切欠部２０ａが設けられ、この切欠部２０ａよりも後側分に、付勢部材挿通部２３ａが設けられ、切欠部２０ａ内の前寄りに、ガイド部２３ｃが設けられる。 To explain in detail, a notch 20a facing inward in the radial direction is provided at a midpoint in the longitudinal direction of the pusher 20, and a biasing member insertion portion 23a is provided on the rear side of this notch 20a. , a guide portion 23c is provided near the front inside the notch 20a.

付勢部材挿通部２３ａは、押子２０の後端側部分を前後方向へ貫通する孔であり、付勢部材４０を遊挿可能な内径を有する。
この付勢部材挿通部２３ａは、好ましくは、付勢部材４０の全長の半分以上を内在する長さを有する。 The biasing member insertion portion 23a is a hole that penetrates the rear end side portion of the pusher 20 in the front-rear direction, and has an inner diameter into which the biasing member 40 can be inserted loosely.
The biasing member insertion portion 23a preferably has a length that includes half or more of the total length of the biasing member 40.

被掛止部２３ｂは、切欠部２０ａの上底面から軸筒径方向内側へ突出するとともに、その突端側及び懐部分を前方へ向けたフック状の突起である。
この被掛止部２３ｂは、後端側に、前方斜め軸筒径方向内側へ向かうガイド傾斜面２３ｂ１を有する（図４参照）。このガイド傾斜面２３ｂ１は、後方から当接する前側掛合部４２を前方斜め軸筒径方向内側へ導く。 The latched portion 23b is a hook-shaped protrusion that protrudes inward in the radial direction of the shaft cylinder from the upper bottom surface of the notch 20a, and has its tip end and pocket portion directed forward.
This latched portion 23b has a guide inclined surface 23b1 on the rear end side that extends toward the front diagonal shaft cylinder radially inward (see FIG. 4). The guide inclined surface 23b1 guides the front engaging portion 42, which comes into contact with it from the rear, toward the inside in the radial direction of the front oblique shaft cylinder.

ガイド部２３ｃは、フック状の被掛止部２３ｂにおける突端側部分及び懐部分との間に所定幅の空間を置くようにして設けられる。
このガイド部２３ｃは、前進する前側掛合部４２を沿わせて、この前側掛合部４２の進行方向を、軸筒径方向外側へ曲げて被掛止部２３ｂの懐部分へ導く（図４参照）。
図示例によれば、このガイド部２３ｃは、横向き略Ｕ字状の案内路を形成している。 The guide portion 23c is provided so as to leave a space of a predetermined width between the tip side portion and the pocket portion of the hook-shaped hooked portion 23b.
The guide portion 23c guides the forward engaging portion 42 along with it, bends the advancing direction of the front engaging portion 42 outward in the radial direction of the shaft cylinder, and guides it to the pocket portion of the engaged portion 23b (see FIG. 4). .
According to the illustrated example, the guide portion 23c forms a horizontally substantially U-shaped guide path.

筆記芯３０は、インク収容管の前端側に筆記部であるボールペンチップを接続したボールペン用リフィールである。
複数の筆記芯３０は、前記ボールペン用リフィールや、図示しないシャープペンシル用リフィール、電子ペン用筆記芯等を適宜に組み合わせて構成すればよい。 The writing core 30 is a refill for a ballpoint pen in which a ballpoint pen tip, which is a writing part, is connected to the front end side of an ink storage tube.
The plurality of writing leads 30 may be constructed by appropriately combining the refills for ballpoint pens, refills for mechanical pencils (not shown), writing leads for electronic pens, etc.

付勢部材４０は、引張コイルバネであり、その前端側を押子２０に掛止するとともに後端側を押子２０から後方へ突出して軸筒１０（詳細には後軸１２）に掛止している。
この付勢部材４０は、コイル状の付勢部材本体４１と、付勢部材本体４１の前端から前方へ突出する前側掛合部４２と、付勢部材本体４１の後端から後方へ突出する後側掛合部４３とを一体に有する。 The biasing member 40 is a tension coil spring, and its front end side is hooked to the pusher 20, and its rear end side projects rearward from the pusher 20 and hooked to the shaft tube 10 (specifically, the rear shaft 12). ing.
The biasing member 40 includes a coil-shaped biasing member main body 41, a front engaging portion 42 that projects forward from the front end of the biasing member main body 41, and a rear side that projects rearward from the rear end of the biasing member main body 41. It has an engaging part 43 integrally.

付勢部材本体４１は、引張バネとしてコイル状に構成される。この付勢部材本体４１は、図示例によれば、全長の半分以上が、押子２０の付勢部材挿通部２３ａに挿通される。 The biasing member main body 41 is configured in a coil shape as a tension spring. According to the illustrated example, more than half of the entire length of the biasing member main body 41 is inserted into the biasing member insertion portion 23a of the pusher 20.

前側掛合部４２と後側掛合部４３は、それぞれ、環状に形成され、付勢部材本体４１の径方向外側寄りから、前方と後方へ突出している。これら前側掛合部及び後側掛合部の他例としては、フック状に形成された態様や、付勢部材本体４１の径方向中央寄りから突出する態様等とすることも可能である。 The front engaging portion 42 and the rear engaging portion 43 are each formed in an annular shape and protrude forward and backward from the radially outer side of the biasing member main body 41. Other examples of the front engaging portion and the rear engaging portion include a hook-shaped configuration, a configuration that projects from the center of the biasing member main body 41 in the radial direction, and the like.

上記構成によれば、付勢部材４０を前進させると、この前進する付勢部材４０の前側掛合部４２が、ガイド部２３ｃに導かれて、被掛止部２３ｂの懐部分まで移動し、被掛止部２３ｂによって掛止される。
この後、付勢部材挿通部２３ａから後方へ突出する後側掛合部４３が、不動部位に掛止され、後軸１２に対し尾栓１４が装着される。
ここで、前記不動部位は、後側掛合部４３に対し前後に動かない部位であればよく、図示例によれば、後軸１２の後端側の被掛止部１２ｄとしているが、他例としては、尾栓１４やその他の不動な部位にすることが可能である。 According to the above configuration, when the biasing member 40 is moved forward, the front engaging portion 42 of the advancing biasing member 40 is guided by the guide portion 23c and moves to the pocket portion of the latched portion 23b. It is latched by the latching portion 23b.
Thereafter, the rear engaging portion 43 that protrudes rearward from the biasing member insertion portion 23a is engaged with the immovable portion, and the tail plug 14 is attached to the rear shaft 12.
Here, the immovable portion may be any portion that does not move back and forth with respect to the rear engaging portion 43, and in the illustrated example, it is the engaged portion 12d on the rear end side of the rear shaft 12, but other examples may be used. Alternatively, it can be a tail plug 14 or other immovable part.

なお、図中、符号５０は、複数の筆記芯３０を、それぞれ長手方向の中央側で、前後方向へ進退自在に挿通する筆記芯ガイド部材である。 In addition, in the figure, the code|symbol 50 is a writing lead guide member into which the several writing lead 30 is inserted in the center side of each longitudinal direction so that it can move forward and backward in the front and rear directions.

＜作用効果＞
次に、上記構成の出没式筆記具Ａについて、その機能、及び作用効果等を詳細に説明する。
選択した押子２０を手で前進させれば、押子２０が軸筒１０内に沈みこんで、軸筒１０内の被係止部１２ｅに係止される。
この後、他の押子２０を前進させれば、この前進した押子２０が、先に前進した押子２０に当接して該押子２０の係止状態を解除する。このため、係止解除された押子２０は、付勢部材４０の引張力によって初期位置まで後退する。 <Effect>
Next, the functions, effects, etc. of the retractable writing instrument A having the above configuration will be explained in detail.
When the selected pusher 20 is moved forward by hand, the pusher 20 sinks into the barrel 10 and is locked to the locked portion 12e inside the barrel 10.
Thereafter, when another pusher 20 is moved forward, the pusher 20 that has moved forward comes into contact with the pusher 20 that has moved forward first, thereby releasing the locked state of the pusher 20 . Therefore, the unlocked pusher 20 retreats to the initial position due to the tensile force of the biasing member 40.

上記構成の出没式筆記具Ａによれば、複数の付勢部材４０を、それぞれ、対応する押子２０に内在するようにしている。
このため、付勢部材４０が軸筒１０内周や隣接する他の付勢部材４０に干渉するのを防ぐことができる上、押子２０の後側に位置する付勢部材４０によって軸筒全体が長くなってしまうのを防ぐことができる。よって、動作性が良好な上、軸筒を小径化及び短縮化したり、逆に筆記芯を大型化してインク量を増大したりすることが可能になる。 According to the retractable writing instrument A having the above configuration, each of the plurality of biasing members 40 is included in the corresponding pusher 20.
Therefore, it is possible to prevent the biasing member 40 from interfering with the inner periphery of the barrel 10 or other adjacent biasing members 40, and the biasing member 40 located on the rear side of the pusher 20 can be applied to the entire barrel. can be prevented from becoming too long. Therefore, in addition to good operability, it is possible to reduce the diameter and shorten the barrel, or conversely, increase the amount of ink by increasing the size of the writing core.

また、出没式筆記具Ａによれば、押子２０の付勢部材挿通部２３ａに付勢部材４０を挿入し、この付勢部材４０を前方へ押せば、付勢部材４０の前側掛合部４２が、ガイド傾斜面２３ｂ１に沿って軸筒径方向内側へ弾性的に曲げられ（図４参照）、この後、ガイド部２３ｃに沿うようにして弾性的に復元し、被掛止部２３ｂの懐部分に入り込む。よって、当該出没式筆記具Ａの製造時に、付勢部材４０の前側掛合部４２を押子２０に掛止する作業を容易化することができる。
しかも、前側掛合部４２の掛止箇所が、押子２０外に露出するため（図２参照）、掛止部分を目視し易くすることができる。 Further, according to the retractable writing instrument A, when the biasing member 40 is inserted into the biasing member insertion portion 23a of the pusher 20 and the biasing member 40 is pushed forward, the front engaging portion 42 of the biasing member 40 is moved. , is elastically bent inward in the shaft cylinder radial direction along the guide inclined surface 23b1 (see FIG. 4), and then elastically restored along the guide portion 23c, and the pocket portion of the hooked portion 23b Get into it. Therefore, when manufacturing the retractable writing instrument A, the work of hooking the front engaging portion 42 of the biasing member 40 to the pusher 20 can be facilitated.
Moreover, since the hooking portion of the front hooking portion 42 is exposed outside the pusher 20 (see FIG. 2), the hooking portion can be easily viewed.

＜変形例＞
上記出没式筆記具Ａでは、付勢部材４０の前半部側を部分的に押子２０に内在するようにしたが、他例としては、付勢部材４０の全体を押子２０に内在する態様や、付勢部材４０前側における図示よりも少ない範囲を押子２０に内在する態様等とすることも可能である。 <Modified example>
In the above-described retractable writing instrument A, the front half of the biasing member 40 is partially internal to the pusher 20, but other examples include a mode in which the entire biasing member 40 is internal to the pusher 20, or , it is also possible to make a smaller area on the front side of the biasing member 40 than shown in the drawings internal to the pusher 20.

また、上記出没式筆記具Ａでは、付勢部材４０におけるコイル状の付勢部材本体４１の一部を押子２０に内在したが、他例としては、付勢部材本体４１の全部を押子２０に内在するようにしてもよい。 Further, in the retractable writing instrument A, a part of the coil-shaped urging member main body 41 of the urging member 40 is included in the pusher 20, but as another example, the entire urging member main body 41 is inside the pusher 20. It may be made to be inherent in .

また、上記出没式筆記具Ａでは、付勢部材４０を、付勢部材本体４１と前側掛合部４２と後側掛合部４３によって構成したが、他例としては、前側掛合部４２及び後側掛合部４３を省き、付勢部材本体４１の前端側を押子２０に直接掛止するとともに同付勢部材本体４１の後端側を軸筒１０に直接掛止した態様とすることも可能である。 In addition, in the retractable writing instrument A, the biasing member 40 is composed of the biasing member main body 41, the front side engaging part 42, and the rear side engaging part 43, but as another example, the front side engaging part 42 and the rear side engaging part 43 may be omitted, and the front end side of the biasing member main body 41 is directly hooked to the pusher 20, and the rear end side of the biasing member main body 41 is also directly hooked to the shaft cylinder 10.

また、本発明は上述した実施態様に限定されず、本発明の要旨を変更しない範囲で適宜変更可能である。 Further, the present invention is not limited to the embodiments described above, and can be modified as appropriate without changing the gist of the present invention.

１０：軸筒
１１：前軸
１２：後軸
１２ｄ：被掛止部
２０：押子
２３：自動掛止部
２３ａ：付勢部材挿通部
２３ｂ：被掛止部
２３ｃ：ガイド部
３０：筆記芯
４０：付勢部材
４１：付勢部材本体
４２：前側掛合部
４３：後側掛合部
Ａ：出没式筆記具 10: Shaft cylinder 11: Front shaft 12: Rear shaft 12d: Latched part 20: Pusher 23: Automatic latching part 23a: Biasing member insertion part 23b: Latched part 23c: Guide part 30: Writing lead 40 : Biasing member 41: Biasing member main body 42: Front engaging part 43: Rear engaging part A: Retractable writing instrument

Claims (4)

軸筒と、前記軸筒の周壁に挿通されて進退可能な押子と、前記押子に接続された筆記芯と、前記押子及び前記筆記芯を後方へ付勢する付勢部材とを備え、前記押子を前進させる操作により前記筆記芯を前記軸筒の前端から突出させるようにした出没式筆記具であって、
前記付勢部材は、引張バネであり、その前端側を前記押子に掛止するとともに後端側を不動部位に掛止し、
前記押子には、組立時に後方から挿入される前記付勢部材を自動的に掛止する自動掛止部が内在していることを特徴とする出没式筆記具。 A shaft tube, a pusher inserted into a peripheral wall of the shaft tube and movable back and forth, a writing lead connected to the pusher, and an urging member that urges the pusher and the writing lead backward. , a retractable writing instrument in which the writing lead is made to protrude from the front end of the barrel by an operation of advancing the pusher,
The biasing member is a tension spring, and has its front end hooked to the pusher and its rear end hooked to an immovable part;
A retractable writing instrument characterized in that the pusher includes an automatic latching portion that automatically latches the urging member inserted from the rear during assembly. 前記付勢部材の前端側には、掛合部が設けられ、
前記自動掛止部は、前記掛合部を掛止する被掛止部と、組立時に後方から挿入される前記掛合部を前記被掛止部によって掛止可能な位置まで案内するガイド部とを有することを特徴とする請求項１記載の出没式筆記具。 A hooking portion is provided on the front end side of the biasing member,
The automatic latching part has a latching part that latches the latching part, and a guide part that guides the latching part inserted from the rear during assembly to a position where it can be latched by the latching part. The retractable writing instrument according to claim 1, characterized in that: 前記被掛止部は、懐部分を前方へ向けたフック状に形成され、
前記ガイド部は、前進する前記掛合部の進行方向を曲げて前記被掛止部の懐部分へ導くことを特徴とする請求項２記載の出没式筆記具。 The hooked portion is formed in a hook shape with a pocket portion facing forward,
3. The retractable writing instrument according to claim 2, wherein the guide section bends the advancing direction of the advancing hooking section and guides it to the pocket portion of the hooked section. 前記押子の後端側には、前記付勢部材を前後方向へ貫通する付勢部材挿通部が設けられ、前記被掛止部は、前記付勢部材挿通部よりも前側で押子外に露出していることを特徴とする請求項２又は３記載の出没式筆記具。
 A biasing member insertion portion that penetrates the biasing member in the front-rear direction is provided on the rear end side of the pusher, and the latched portion extends outside the pusher on the front side of the biasing member insertion portion. The retractable writing instrument according to claim 2 or 3, wherein the writing instrument is exposed.
JP2020096706A 2020-06-03 2020-06-03 removable writing instrument Active JP7448420B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002120490A (en) 2000-10-18 2002-04-23 Mitsubishi Pencil Co Ltd Dual type writing implement
JP2006337564A (en) 2005-05-31 2006-12-14 Pentax Corp Spring tension structure for lens barrel
JP2007203658A (en) 2006-02-03 2007-08-16 Zebra Pen Corp Retractable writing utensil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002120490A (en) 2000-10-18 2002-04-23 Mitsubishi Pencil Co Ltd Dual type writing implement
JP2006337564A (en) 2005-05-31 2006-12-14 Pentax Corp Spring tension structure for lens barrel
JP2007203658A (en) 2006-02-03 2007-08-16 Zebra Pen Corp Retractable writing utensil

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