JP2021187108A - Retractable writing instrument - Google Patents

Abstract

To reduce the diameter of a barrel.SOLUTION: A retractable writing instrument comprises a barrel 10, a pusher 20 which can be advanced and retracted by being inserted into a peripheral wall of the barrel 10, a writing core 30 connected to the pusher 20, and an energization member 40 for energizing the pusher 20 and the writing core 30 backward, in which the operation of advancing the pusher 20 allows the writing core 30 to be protruded from a forward end of the barrel 10, and at least a part of the energization member 40 is present in the pusher.SELECTED DRAWING: Figure 2

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。 The present invention relates to a haunting writing instrument that haunts the writing section 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, for example, as described in Patent Document 1, a plurality of inventions are slidably engaged with a shaft cylinder and exposed from the outer peripheral surface of the shaft cylinder in the circumferential direction. It is provided with an array of pushers, a writing core connected to each of the plurality of pushers in the barrel, and a compression coil spring mounted in an annular shape for each writing core to urge the pusher and the writing core rearward. There is a writing instrument in which the writing portion of the writing core connected to the pusher is projected from the front end of the barrel by an operation of sliding any of the plurality of pushers.
By the way, according to such a writing instrument, a space for mounting a compression coil spring is required on the outer periphery of the writing core, so that the diameter of the cylinder tends to be large.
Therefore, for example, in the invention described in Patent Document 2, instead of the compression coil spring, a tension coil spring is provided on the rear side of the pusher, and the pusher is pulled backward by the tension coil spring.

特開２００５−１１１８７６号公報Japanese Unexamined Patent Publication No. 2005-111876 特開２０１６−０９３９７６号公報Japanese Unexamined Patent Publication No. 2016-03976

しかしながら、後者従来技術では、押子よりも後側に位置する引張コイルバネによって、軸筒の全長が長くなってしまう。 However, in the latter conventional technique, the total length of the barrel becomes long due to the tension coil spring located on the rear side of the pusher.

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、前記付勢部材の少なくとも一部を、前記押子に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 has the following configurations.
It is provided with a shaft cylinder, a pusher that is inserted through the peripheral wall of the shaft cylinder and can move forward and backward, a writing core connected to the pusher, and an urging member that urges the pusher and the writing core rearward. A haunting writing instrument in which the writing core is projected from the front end of the barrel by an operation of advancing the pusher, and at least a part of the urging member is contained in the pusher. A haunting writing instrument featuring.

本発明は、以上説明したように構成されているので、動作性が良好な上、軸筒の小型化が可能になる。 Since the present invention is configured as described above, the operability is good and the barrel can be miniaturized.

本発明に係る出没式筆記具の一例を示す半断面である。It is a half cross section which shows an example of the haunting type writing instrument which concerns on this 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 semi-cross-sectional view showing the main part of the haunting type writing instrument in an enlarged manner. 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。It is a figure which shows the procedure of connecting an urging member to a pusher sequentially in (a)-(b), and only the pusher is shown in the 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 the automatic hooking part, and the pusher is shown in the cross section. 本発明に係る出没式筆記具の他例について、要部を拡大して示す半断面図である。It is a half-cross-sectional view which shows the main part enlarged about another example of the haunting type writing instrument which concerns on this invention.

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、前記付勢部材の少なくとも一部を、前記押子に内在している（図１〜図５参照）。 In this embodiment, the following features are disclosed.
The first feature is that the shaft cylinder, the pusher that is inserted through the peripheral wall of the shaft cylinder and can move forward and backward, the writing core connected to the pusher, and the pusher and the writing core are urged rearward. A retractable writing instrument provided with an urging member and having the writing core protrude from the front end of the barrel by an operation of advancing the pusher, and at least a part of the urging member is attached to the pusher. (See FIGS. 1 to 5).

第２の特徴として、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前記押子から後方へ突出して不動部位に掛止している（図２参照）。 As a second feature, the urging member is a tension spring, the front end side thereof is hooked on the pusher, and the rear end side is projected rearward from the pusher to be hooked on the immovable portion ( See Figure 2).

第３の特徴として、前記付勢部材は、引張コイルバネであり、そのコイル状部分の少なくとも一部を、前記押子に内在している（図２参照）。 As a third feature, the urging member is a tension coil spring, and at least a part of the coiled portion thereof is inherent in the pusher (see FIG. 2).

第４の特徴として、前記押子の後端側には、前後方向の貫通孔状の付勢部材挿通部と、前記付勢部材挿通部よりも前側で押子外に露出した被掛止部が設けられ、前記付勢部材の前端側は、前記付勢部材挿通部に貫通状に挿通されて前記被掛止部に掛止されている（図１〜図４参照）。 As a fourth feature, on the rear end side of the pusher, a through-hole-shaped urging member insertion portion in the front-rear direction and a hooking portion exposed to the outside of the pusher on the front side of the urging member insertion portion. Is provided, and the front end side of the urging member is inserted through the urging member insertion portion in a penetrating manner and is hooked to the hooked portion (see FIGS. 1 to 4).

＜第１の実施態様＞
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。 <First embodiment>
Next, a specific embodiment having the above characteristics will be described in detail with reference to the drawings.
In the present specification, the axial direction of the axial cylinder means the direction in which the center line of the axial cylinder extends, and the circumferential direction of the axial cylinder means the direction around the outer periphery of the axial cylinder. Further, "front" means a direction in which the writing portion protrudes on one side in the axial direction of the cylinder, and "rear" means a side in the opposite direction to the one side.
Further, the diameter direction of the cylinder means the diameter direction of the cylinder orthogonal to the center line of the cylinder, and the outside of the diameter direction of the cylinder means the direction away from the center of the cylinder along the diameter direction of the cylinder. The inside 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 haunting type writing tool A has a shaft cylinder 10, a plurality of pushers 20 that are radially inserted into the peripheral wall on the rear end side of the shaft cylinder 10 and can move forward and backward along the peripheral wall, and a plurality of pushers 20 in the shaft cylinder 10. A plurality of writing cores 30 connected to each of the pushers 20 and a urging member 40 for urging the plurality of pushers 20 and the writing cores 30 to the rear are provided, and the selected pusher 20 is advanced by an operation of advancing the selected pusher 20. The writing portion 31 of the writing core 30 corresponding to the advanced pusher 20 is projected from the front end of the barrel 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 axle cylinder 10 is formed in a substantially cylindrical shape extending in the front-rear direction, and is composed of a front shaft 11 and a rear shaft 12 screwed and connected to the rear end side of the front shaft 11.
In addition, as an embodiment other than the illustrated example, the shaft cylinder 10 may be formed from a single member or may be formed 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 formed in a substantially cylindrical shape from a hard synthetic resin material, and has a tip portion 11a on the front end side thereof. The tip portion 11a is formed in the shape of a tapered cylinder with a front end opened.

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 into a substantially cylindrical shape extending in the front-rear direction from the hard synthetic resin material.

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 for fitting the pusher 20 and sliding back and forth are provided at intervals in the circumferential direction.
Each pusher guide portion 12b extends in a long shape in the front-rear direction and penetrates the peripheral wall of the rear shaft 12 in the radial direction. The rear end of the 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。 Further, on the inner peripheral surface of the rear shaft 12, a stepped locked portion 12e for locking the pusher 20 when moving forward and sinking into the shaft cylinder is provided.

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 cylinder portion 12c that has been reduced in diameter and protrudes rearward is provided on the rear side of the pusher guide portion 12b on the rear shaft 12.
A breech plug 14 is fitted into the fitting cylinder portion 12c in an annular shape. The breech plug 14 is formed in a bottomed tubular shape with the rear as the bottom.

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 engaging the urging member 40 are provided at predetermined intervals in the circumferential direction so as to correspond to each pusher guide portion 12b. It will be provided. As shown in FIG. 2, these plurality of fitting cylinder portions 12c are located in the space inside the breech plug 14.
Each hooked portion 12d is formed in a hook shape that protrudes radially outward from the fitting cylinder portion 12c and has a protruding end side 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 formed in a long shape extending in the front-rear direction from a hard synthetic resin material, the rear end portion of the writing core 30 is fitted to the front end side thereof, and the urging member 40 described later is embedded in the rear end side. ing.
The pusher 20 sinks into the axle cylinder when the operation portion 21 is pushed forward, and the locking portion 22 on the rear end side is locked by the stepped locked portion in the rear shaft 12. Lock to 12e. Then, in this locked state, when another pusher advances, the locked state is released by being brought into contact with the 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。 On the rear end side of the pusher 20, an automatic hooking portion 23 for automatically hooking the urging member 40 inserted from the rear at the time of assembly is provided.
The automatic hooking portion 23 includes a biasing member insertion portion 23a that penetrates the biasing member 40 in the front-rear direction, a hooked portion 23b that is exposed to the outside of the pusher on the front side of the biasing member insertion portion 23a, and a biasing portion 23b. It has a guide portion 23c that guides the front side engaging portion 42 of the member 40 to a position where it can be hooked by the hooked portion 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。 More specifically, a notch 20a facing inward in the radial direction is provided in the middle of the pusher 20 in the longitudinal direction, and an urging member insertion portion 23a is provided on the rear side of the notch 20a. A guide portion 23c is provided near the front in the notch portion 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 urging 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 that allows the urging member 40 to be loosely inserted.
The urging member insertion portion 23a preferably has a length inherent in more than half of the total length of the urging 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 hooked 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 portion 20a and has the tip side and the pocket portion directed forward.
The hooked portion 23b has a guide inclined surface 23b1 facing inward in the radial direction of the forward oblique shaft cylinder on the rear end side (see FIG. 4). The guide inclined surface 23b1 guides the front side engaging portion 42, which abuts from the rear, inward 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 place a space having a predetermined width between the tip side portion and the pocket portion of the hook-shaped hooked portion 23b.
The guide portion 23c bends the traveling direction of the front side engaging portion 42 outward in the radial direction of the barrel along the front side engaging portion 42 that advances, and guides the traveling direction to the pocket portion of the hooked portion 23b (see FIG. 4). ..
According to the illustrated example, the guide portion 23c forms a laterally 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 ballpoint pen refill in which a ballpoint pen chip, which is a writing portion, is connected to the front end side of the ink storage tube.
The plurality of writing cores 30 may be configured by appropriately combining the ballpoint pen refill, a mechanical pencil refill (not shown), a writing core for an electronic pen, and the like.

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 urging member 40 is a tension coil spring, the front end side thereof is hooked on the pusher 20, and the rear end side is projected rearward from the pusher 20 to be hooked on the shaft cylinder 10 (specifically, the rear shaft 12). ing.
The urging member 40 includes a coiled urging member main body 41, a front side engaging portion 42 protruding forward from the front end of the urging member main body 41, and a rear side protruding rearward from the rear end of the urging member main body 41. It has a meshing portion 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 urging member main body 41 is configured in a coil shape as a tension spring. According to the illustrated example, more than half of the total length of the urging member main body 41 is inserted into the urging 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 side engaging portion 42 and the rear side engaging portion 43 are formed in an annular shape, respectively, and project forward and backward from the radial outer side of the urging member main body 41. As another example of these front-side engagement portions and rear-side engagement portions, it is also possible to have an embodiment formed in a hook shape, an embodiment in which the urging member main body 41 protrudes from the radial center side, 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 urging member 40 is advanced, the front side engaging portion 42 of the advancing urging member 40 is guided by the guide portion 23c and moves to the pocket portion of the hooked portion 23b to be covered. It is hooked by the hooking portion 23b.
After that, the rear side engaging portion 43 projecting rearward from the urging member insertion portion 23a is hooked to the immovable portion, and the tail plug 14 is attached to the rear shaft 12.
Here, the immovable portion may be a portion that does not move back and forth with respect to the rear side engaging portion 43, and according to the illustrated example, it is a hooked portion 12d on the rear end side of the rear shaft 12, but other examples. It can be a breech plug 14 or other immovable site.

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 the figure, reference numeral 50 is a writing core guide member that inserts a plurality of writing cores 30 freely in the front-rear direction on the center side in the longitudinal direction.

＜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。 <Action effect>
Next, the function, action and effect of the haunting type writing tool A having the above configuration will be described in detail.
If the selected pusher 20 is moved forward by hand, the pusher 20 sinks into the shaft cylinder 10 and is locked to the locked portion 12e in the shaft cylinder 10.
After that, if another pusher 20 is moved forward, the forward pusher 20 comes into contact with the previously forward pusher 20 to release the locked state of the pusher 20. Therefore, the unlocked pusher 20 retracts to the initial position due to the tensile force of the urging 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 haunting type writing tool A having the above configuration, the plurality of urging members 40 are embedded in the corresponding pusher 20 respectively.
Therefore, it is possible to prevent the urging member 40 from interfering with the inner circumference of the barrel 10 and other urging members 40 adjacent to the barrel 10, and the urging member 40 located on the rear side of the pusher 20 makes the entire barrel. Can be prevented from becoming long. Therefore, it is possible to improve the operability, reduce the diameter and shorten the diameter of the shaft cylinder, and conversely increase the size of the writing core to increase the amount of ink.

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 haunting type writing tool A, if the urging member 40 is inserted into the urging member insertion portion 23a of the pusher 20 and the urging member 40 is pushed forward, the front side engaging portion 42 of the urging member 40 is formed. , Elastically bent inward in the radial direction of the barrel 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 in. Therefore, it is possible to facilitate the work of hooking the front side engaging portion 42 of the urging member 40 to the pusher 20 at the time of manufacturing the haunting type writing tool A.
Moreover, since the hooking portion of the front side engaging portion 42 is exposed to the outside of the pusher 20 (see FIG. 2), the hooking portion can be easily visually recognized.

＜第２の実施態様＞
次に、本発明に係る出没式筆記具の他例について説明する。なお、以下に示す実施態様は、上記出没式筆記具Ａについてその一部を変更したものであるため、主にその変更部分について詳述し、重複する詳細説明を省略する。 <Second embodiment>
Next, another example of the haunting writing instrument according to the present invention will be described. In addition, since the embodiment shown below is a partial modification of the haunting type writing tool A, the modified portion will be mainly described in detail, and duplicate detailed description will be omitted.

図５に示す出没式筆記具Ｂは、上記出没式筆記具Ａについて、後軸１２を後軸１２’に置換し、押子２０を押子２０’に置換し、付勢部材４０を付勢部材４０’に置換したものである。 In the haunting type writing tool B shown in FIG. 5, in the haunting type writing tool A, the rear shaft 12 is replaced with the rear shaft 12', the pusher 20 is replaced with the pusher 20', and the urging member 40 is replaced with the urging member 40. It is replaced with'.

後軸１２’は、その内側に、付勢部材４０’の前端部を受ける受部１２ｆを一体的に有する。 The rear shaft 12'integrates a receiving portion 12f inside which receives the front end portion of the urging member 40'.

押子２０’は、押子２０の付勢部材挿通部２３ａ，被掛止部２３ｂ，ガイド部２３ｃ等を、軸筒径方向内側を開口した切欠状の付勢部材収容部２３ｄに置換したものである。 In the pusher 20', the urging member insertion portion 23a, the hooked portion 23b, the guide portion 23c, etc. of the pusher 20 are replaced with a notch-shaped urging member accommodating portion 23d having an opening inside in the radial direction of the barrel. Is.

付勢部材４０’は、付勢部材収容部２３ｄに収容された圧縮コイルバネである。この付勢部材４０’は、前端を受部１２ｆに当接するとともに後端を付勢部材収容部２３ｄの後端壁に当接させて、押子２０’を後方へ付勢している。 The urging member 40'is a compression coil spring housed in the urging member accommodating portion 23d. In the urging member 40', the front end is brought into contact with the receiving portion 12f and the rear end is brought into contact with the rear end wall of the urging member accommodating portion 23d to urge the pusher 20'to the rear.

よって、図５に示す出没式筆記具Ｂによれば、上記出没式筆記具Ａと略同様に、動作性が良好な上、軸筒の小型化または筆記芯の大型化が可能になる。 Therefore, according to the infestation type writing instrument B shown in FIG. 5, the operability is good, and the barrel can be made smaller or the writing core can be made larger, as in the case of the infestation type writing instrument A.

＜その他の変形例＞
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。 <Other variants>
In the above-mentioned haunting type writing tool A, the front half side of the urging member 40 is partially embedded in the pusher 20, but as another example, the entire urging member 40 is embedded in the pusher 20. It is also possible to have a mode in which the pusher 20 has a smaller range than shown in the figure on the front side of the urging member 40.

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 above-mentioned haunting type writing tool A, a part of the coil-shaped urging member main body 41 in the urging member 40 is contained in the pusher 20, but as another example, the entire urging member main body 41 is included in the pusher 20. It may 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。 Further, in the above-mentioned haunting type writing tool A, the urging member 40 is composed of the urging member main body 41, the front side engaging portion 42, and the rear side engaging portion 43, but as another example, the front side engaging portion 42 and the rear side engaging portion are formed. It is also possible to omit the 43 and directly hook the front end side of the urging member main body 41 to the pusher 20 and directly hook the rear end side of the urging member main body 41 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 above-described embodiment, and can be appropriately changed without changing the gist of the present invention.

１０：軸筒
１１：前軸
１２，１２’：後軸
１２ｄ：被掛止部
２０，２０’：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
４０，４０’：付勢部材
４１：付勢部材本体
４２：前側掛合部
４３：後側掛合部
Ａ，Ｂ：出没式筆記具 10: Shaft cylinder 11: Front shaft 12, 12': Rear shaft 12d: Hooked part 20, 20': Pusher 23: Automatic hooking part 23a: Bouncer member insertion part 23b: Hooked part 23c: Guide Part 30: Writing core 40, 40': Bounce member 41: Basis member main body 42: Front side engagement part 43: Rear side engagement part A, B: Haunting type writing tool

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、前記付勢部材の少なくとも一部を、前記押子に内在していることを特徴とする出没式筆記具。 It is provided with a shaft cylinder, a pusher that is inserted through the peripheral wall of the shaft cylinder and can move forward and backward, a writing core connected to the pusher, and an urging member that urges the pusher and the writing core rearward. A haunting writing instrument in which the writing core is projected from the front end of the barrel by an operation of advancing the pusher, and at least a part of the urging member is contained in the pusher. A haunting writing instrument featuring. 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前記押子から後方へ突出して不動部位に掛止していることを特徴とする請求項１記載の出没式筆記具。 The urging member is a tension spring, and the front end side thereof is hooked on the pusher, and the rear end side is projected rearward from the pusher to be hooked on an immovable portion. The haunting type writing tool described in 1. 前記付勢部材は、引張コイルバネであり、そのコイル状部分の少なくとも一部を、前記押子に内在していることを特徴とする請求項１又は２記載の出没式筆記具。 The haunting type writing tool according to claim 1 or 2, wherein the urging member is a tension coil spring, and at least a part of the coil-shaped portion thereof is contained in the pusher. 前記押子の後端側には、前後方向の貫通孔状の付勢部材挿通部と、前記付勢部材挿通部よりも前側で押子外に露出した被掛止部が設けられ、
前記付勢部材の前端側は、前記付勢部材挿通部に貫通状に挿通されて前記被掛止部に掛止され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。 On the rear end side of the pusher, a through-hole-shaped urging member insertion portion in the front-rear direction and a hooking portion exposed to the outside of the pusher on the front side of the urging member insertion portion are provided.
The haunting type writing tool according to claim 2 or 3, wherein the front end side of the urging member is inserted through the urging member insertion portion in a penetrating manner and is hooked on the hooked portion.

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