JP2022147917A - writing instrument - Google Patents

Abstract

To improve operability.SOLUTION: The writing instrument includes: a barrel 10; a mechanical pencil inner core 20 which is provided in the barrel 10 and feeds a stored lead core x forward; a lead core supply path opening/closing member 70 provided to open and close a lead core supply path 51e to the mechanical pencil inner core 20; and an opening/closing operation body 80 sliding in a front-rear direction on an outer peripheral side of the barrel 10. In conjunction with the sliding of the opening/closing operation body 80, the lead core supply path opening/closing member 70 is opened/closed.SELECTED DRAWING: Figure 4

Description

本発明は、シャープペンシル用中芯を備えた筆記具に関するものである。 TECHNICAL FIELD The present invention relates to a writing instrument having a core for a mechanical pencil.

従来、この種の筆記具には、例えば特許文献１に記載されるように、軸筒と、収容した鉛芯を前方へ繰出すシャープペンシル筆記体と、軸筒の外周部に設けられて前後方向へスライド操作可能なノック棒と、ノック棒の後端側に回転自在に設けられた蓋部材とを備え、蓋部材を回転させる操作により、シャープペンシル筆記体への芯補充路を開閉するようにした筆記具がある。
この筆記具によれば、芯補充路の開閉のために着脱されるキャップ等を具備しないため、前記キャップ等を紛失してしまう心配がない。 2. Description of the Related Art Conventionally, as described in Patent Document 1, for example, this type of writing instrument includes a shaft tube, a mechanical pencil writing body for feeding out a contained lead lead forward, and a front-back direction provided on the outer peripheral portion of the shaft tube. and a lid member rotatably provided on the rear end side of the knock rod. I have a writing instrument.
Since this writing instrument does not have a cap or the like that is detachable for opening and closing the lead replenishment path, there is no fear of losing the cap or the like.

特開２０１２－１１１０４０号公報Japanese Unexamined Patent Application Publication No. 2012-111040

しかしながら、上記従来技術によれば、蓋部材を同前後位置で回転させて操作する構造であるため、この蓋部材が、開放状態にあるのか閉鎖状態にあるのかを目視確認し難い。このため、筆記者等が、蓋部材の開放状態に気が付かずに、軸筒の後端側を下方へ向けてしまい、意図せずに鉛芯を抜け落としてしまうおそれがある。 However, according to the above-described prior art, since the lid member is operated by rotating it in the same forward and backward positions, it is difficult to visually confirm whether the lid member is in the open state or the closed state. For this reason, a writer or the like may turn the rear end side of the barrel downward without noticing the open state of the lid member, and unintentionally drop the lead lead.

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、前記軸筒内に設けられるとともに収容した鉛芯を前方へ繰出すシャープペンシル用中芯と、前記シャープペンシル用中芯への鉛芯補給路を開閉するように設けられた鉛芯補給路開閉部材と、前記軸筒の外周側で前後方向へスライドする開閉操作体とを備え、前記開閉操作体のスライドに連動して、前記鉛芯補給路開閉部材を開閉動作させるようにしたことを特徴とする筆記具。 In view of such problems, the present invention comprises the following configurations.
A barrel, a core for a mechanical pencil that is provided in the barrel and feeds out the stored lead lead forward, and a lead that is provided to open and close a lead supply path to the core for the mechanical pencil. A replenishment path opening/closing member and an opening/closing operation body that slides in the front-rear direction on the outer peripheral side of the shaft cylinder are provided, and the lead core supply path opening/closing member is opened/closed in conjunction with the sliding of the opening/closing operation body. A writing instrument characterized by:

本発明は、以上説明したように構成されているので、鉛芯補給路の開閉状態を容易に把握でき、操作性が良好である。 Since the present invention is configured as described above, it is possible to easily grasp the open/closed state of the lead lead supply path, and the operability is excellent.

本発明に係る筆記具の一例を示す全断面図である。1 is a full sectional view showing an example of a writing instrument according to the present invention; FIG. 同筆記具の要部分解斜視図であり、クリップ体のみを縦断面斜視図で示している。It is a principal part exploded perspective view of the same writing instrument, and has shown only the clip body with the longitudinal cross-section perspective view. 開閉操作体を下面側から視た斜視図である。FIG. 4 is a perspective view of the opening/closing operation body as viewed from below; 同筆記具の動作説明図であり、（ａ）（ａ’）は鉛芯補給路を閉鎖した状態の縦断面図と後端面図、（ｂ）（ｂ’）は鉛芯補給路を開放した状態の縦断面図と後端面図である。It is an operation explanatory diagram of the same writing instrument, (a) (a') is a longitudinal sectional view and a rear end view in a state in which the lead supply path is closed, (b) (b') is a state in which the lead supply path is opened. Fig. 3 is a longitudinal sectional view and a rear end view of the; （ｃ）は鉛芯補給路を開放してクリップ前端側を軸筒外周面から引き離した状態の縦断面図であり、（ｃ’）は同状態の後端面図である。(c) is a vertical cross-sectional view showing a state in which the lead lead supply path is opened and the front end side of the clip is separated from the outer peripheral surface of the barrel, and (c') is a rear end view of the same state.

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、前記軸筒内に設けられるとともに収容した鉛芯を前方へ繰出すシャープペンシル用中芯と、前記シャープペンシル用中芯への鉛芯補給路を開閉するように設けられた鉛芯補給路開閉部材と、前記軸筒の外周側で前後方向へスライドする開閉操作体とを備え、前記開閉操作体のスライドに連動して、前記鉛芯補給路開閉部材を開閉動作させるようにした（図１～図５参照）。 The present embodiment discloses the following features.
A first feature is a shaft cylinder, a lead lead for a mechanical pencil that is provided in the shaft cylinder and feeds out a lead lead contained therein, and a lead lead supply path to the core for the mechanical pencil that opens and closes. and an opening/closing operation member that slides in the front-rear direction on the outer peripheral side of the barrel, and the lead lead supply passage opening/closing member is opened in conjunction with the sliding of the opening/closing operation member. It was made to open and close (see FIGS. 1 to 5).

第２の特徴として、前記開閉操作体と前記鉛芯補給路開閉部材とのうちの一方には、軸筒軸方向に対し傾斜した傾斜係合部が設けられ、その他方には、前記開閉操作体のスライドに伴い前記傾斜係合部に摺接して、前記鉛芯補給路を開閉する方向へ移動する滑動部が設けられている（図１～図５参照）。 As a second feature, one of the opening/closing operation body and the lead lead supply path opening/closing member is provided with an inclined engaging portion inclined with respect to the axial direction of the shaft cylinder, and the other is provided with the opening/closing operation member. A sliding portion is provided that slides in contact with the inclined engagement portion as the body slides and moves in the direction of opening and closing the lead lead supply path (see FIGS. 1 to 5).

第３の特徴として、前記傾斜係合部が長孔状に形成され、前記滑動部は、前記傾斜係合部に嵌り合って前記傾斜係合部の延設方向へ滑動するように設けられている（図１～図５参照）。 As a third feature, the inclined engaging portion is formed in an elongated hole shape, and the sliding portion is provided so as to fit into the inclined engaging portion and slide in the extending direction of the inclined engaging portion. (see Figures 1 to 5).

第４の特徴として、前記軸筒の外周部に設けられて前後方向へスライド操作可能な中芯出没操作体と、前記シャープペンシル用中芯を後方へ付勢する付勢部材とを備え、前記中芯出没操作体を前記付勢部材の付勢力に抗して前方へ押動する操作により前記シャープペンシル用中芯を前記軸筒の前端から突出させるようにした筆記具であって、前記開閉操作体は、前記中芯出没操作体に設けられ、前寄り位置で前記鉛芯補給路を閉鎖し、後寄り位置で前記鉛芯補給路を開放する（図１～図５参照）。 As a fourth feature, the mechanical pencil includes a core retracting operation body provided on the outer peripheral portion of the barrel and capable of being slid in the front-rear direction, and a biasing member that biases the mechanical pencil core to the rear. A writing instrument in which the core for a mechanical pencil is projected from the front end of the barrel by an operation of pushing the core retracting operation body forward against the biasing force of the biasing member, wherein the opening and closing operation is performed. A body is provided on the core retracting operation body, and closes the lead lead supply path at a forward position and opens the lead lead supply path at a rearward position (see FIGS. 1 to 5).

第５の特徴として、前記軸筒の外周部に設けられて前後方向へスライド操作可能な中芯出没操作体と、前記シャープペンシル用中芯を後方へ付勢する付勢部材とを備え、前記中芯出没操作体を前記付勢部材の付勢力に抗して前方へ押動する操作により前記シャープペンシル用中芯を前記軸筒の前端から突出させるようにした筆記具であって、前記開閉操作体は、前記中芯出没操作体に設けられ、前記中芯出没操作体は、支点部よりも後側が軸筒径方向内側へ押動される操作により同支点部よりも前側を軸筒外周面から離隔する開閉操作機能付きのクリップ体を具備し、前記傾斜係合部には、前記クリップ体を開放した際に前記滑動部に嵌り合う逃げ部が設けられている（図５参照）。 As a fifth feature, the mechanical pencil includes a core retractable operation body provided on the outer peripheral portion of the barrel and capable of being slid in the front-rear direction, and a biasing member that biases the mechanical pencil core to the rear. A writing instrument in which the core for a mechanical pencil is projected from the front end of the barrel by an operation of pushing the core retracting operation body forward against the biasing force of the biasing member, wherein the opening and closing operation is performed. The body is provided on the core retracting operating body, and the core retracting operating body pushes the rear side of the fulcrum portion radially inwardly of the shaft cylinder to move the front side of the fulcrum portion to the outer peripheral surface of the barrel. The inclined engaging portion is provided with a relief portion that fits into the sliding portion when the clip body is released (see FIG. 5).

第６の特徴として、前記クリップ体には、前記支点部よりも後側の部分が軸筒径方向内側へ押動された場合に前記鉛芯補給路の後方の延長線上に位置するように、鉛芯抜け防止部が設けられている（図５参照）。 As a sixth feature, in the clip body, when the portion on the rear side of the fulcrum portion is pushed radially inward of the shaft cylinder, the clip body is positioned on the rear extension line of the lead core supply path. A lead core removal prevention part is provided (see FIG. 5).

＜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。 <Specific embodiment>
Next, specific embodiments having the above characteristics will be described in detail with reference to the drawings.

本明細書中、軸筒軸方向とは軸筒の中心線の延びる方向を意味し、軸筒周方向とは軸筒中心線の周囲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シャープペンシル用中芯の前端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、本明細書中、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。 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 center line of the barrel. Further, "front" means one side in the axial direction of the barrel and the direction in which the front end of the core for a mechanical pencil protrudes, and "rear" means the side opposite to the one side. .
Further, in this specification, the radial direction of the barrel means the diameter direction of the barrel perpendicular to the center line of the barrel, and the radially outer direction of the barrel means the direction away from the center of the barrel along the radial direction of the barrel. , and the inner side in the radial direction of the barrel means a direction toward the center of the barrel along the radial direction of the barrel.

筆記具Ａは、軸筒１０と、軸筒１０内で進退可能なシャープペンシル用中芯２０及びボールペン用中芯３０と、シャープペンシル用中芯２０及びボールペン用中芯３０をそれぞれ後方へ付勢する付勢部材４０と、軸筒１０の外周部に設けられて前後方向へスライド操作可能な中芯出没操作体５０，６０と、シャープペンシル用中芯２０への鉛芯補給路５１ｅを開閉する鉛芯補給路開閉部材７０と、軸筒１０の外周側で前後方向へスライドするように設けられた開閉操作体８０とを備える。
この筆記具Ａは、中芯出没操作体５０，６０を付勢部材４０の付勢力に抗して選択的に前方へ押動する操作によりシャープペンシル用中芯２０又はボールペン用中芯３０を軸筒１０の前端から突出させる。また、開閉操作体８０のスライドに連動して、鉛芯補給路開閉部材７０を開閉動作させる。 The writing instrument A urges the barrel 10, the mechanical pencil core 20 and the ballpoint pen core 30 that can move back and forth in the barrel 10, and the mechanical pencil core 20 and the ballpoint pen core 30, respectively. An urging member 40, core retractable operating bodies 50 and 60 provided on the outer periphery of the barrel 10 and slidable in the front-rear direction, and lead for opening and closing the lead supply path 51e to the mechanical pencil core 20. It comprises a lead supply path opening/closing member 70 and an opening/closing operation body 80 provided so as to slide in the front-rear direction on the outer peripheral side of the barrel 10 .
In this writing instrument A, the mechanical pencil core 20 or the ballpoint pen core 30 can be pushed forward selectively against the biasing force of the biasing member 40 by selectively pushing the core retracting operation bodies 50 and 60 forward. Protrude from the front end of 10. In conjunction with the sliding of the opening/closing operation body 80, the lead lead supply path opening/closing member 70 is opened/closed.

軸筒１０は、単数又は複数の筒状部材から前後方向へわたる長尺筒状に構成される。図示例の軸筒１０は、前端側に先細筒状の先口部１１ａを有する前軸１１と、この前軸１１の後端側に螺合接続されて後方へ延設された後軸１２とを備える。なお、図中符号１３は、前軸１１の外周部に嵌め合わせられた筒状の弾性グリップである。 The shaft tube 10 is configured in a long tubular shape extending in the front-rear direction from one or more tubular members. The illustrated barrel 10 comprises a front barrel 11 having a tapered cylindrical tip portion 11a on the front end side, and a rear barrel 12 threadedly connected to the rear end side of the front barrel 11 and extending rearward. Prepare. Reference numeral 13 in the drawing denotes a tubular elastic grip fitted to the outer peripheral portion of the front shaft 11. As shown in FIG.

後軸１２は、前端部を開口するとともに、後端部を閉鎖された底部とした有底筒状に形成される。
この後軸１２の後端側の周壁には、シャープペンシル用中芯２０用の中芯出没操作体５０と、ボールペン用中芯３０用の中芯出没操作体６０とを、それぞれ、径方向へ挿通して前後方向へスライド可能にする開口部１２ａ，１２ｂが、周方向に所定の間隔を置いて設けられる。 The rear shaft 12 is formed in a bottomed tubular shape with an open front end and a closed bottom at the rear end.
On the peripheral wall on the rear end side of the rear barrel 12, a core retractable operating body 50 for the mechanical pencil core 20 and a core retractable operating body 60 for the ballpoint pen core 30 are arranged radially. Openings 12a and 12b, which are inserted and slidable in the front-rear direction, are provided at predetermined intervals in the circumferential direction.

図示例によれば、シャープペンシル用中芯２０とボールペン用中芯３０の数に応じて、開口部１２ａを一つ、開口部１２ｂを二つ設けているが、ボールペン用中芯３０及び開口部１２ｂの数を三以上にすることも可能である。 According to the illustrated example, one opening 12a and two openings 12b are provided according to the number of mechanical pencil cores 20 and ballpoint pen cores 30. It is also possible for the number of 12b to be three or more.

各開口部１２ａ，１２ｂの内側面には、中芯出没操作体５０（又は６０）を前後方向へ案内する直線状の案内面（図示せず）と、この案内面に沿って前進した中芯出没操作体５０（又は６０）を軸筒径方向内側へ沈み込ませてする段状の被係止部（図示せず）とが設けられる。
これら案内面及び被係止部等の構造は、例えば、特開２００５－１１１８７６号公報に開示されるものを適用することが可能である。 On the inner surface of each opening 12a, 12b, a linear guide surface (not shown) for guiding the core retracting operation body 50 (or 60) in the front-rear direction and a core moving forward along this guide surface are provided. A stepped locked portion (not shown) is provided to allow the retractable operating body 50 (or 60) to sink radially inwardly of the barrel.
For the structure of these guide surfaces and the engaged portion, for example, the structure disclosed in Japanese Patent Laid-Open No. 2005-111876 can be applied.

後軸１２の前端側の内周面には、シャープペンシル用中芯２０とボールペン用中芯３０をそれぞれ進退自在に挿通するように、中芯保持部材１４が進退不能且つ回転不能に固定される。この中芯保持部材１４は、デバイダーと呼称される場合もある。 A center core holding member 14 is fixed to the inner peripheral surface of the front end side of the rear barrel 12 so that the mechanical pencil center core 20 and the ballpoint pen center core 30 can be inserted forward and backward, respectively, and cannot rotate. . This core holding member 14 is sometimes called a divider.

また、シャープペンシル用中芯２０は、円筒状の芯タンク２１の前端側に、収容した鉛芯ｘを前方へ繰り出す鉛芯繰出し機構２２を接続してなる。
このシャープペンシル用中芯２０は、中芯出没操作体５０におけるスライド体５１の前端側に接続されている。シャープペンシル用中芯２０は、筆記部２２ａを先口部１１ａの前端開口に挿通し係止した状態で、中芯出没操作体５０の進退操作に伴う芯タンク２１の進退運動により、筆記部２２ａから鉛芯を繰り出す。 Further, the mechanical pencil core 20 is formed by connecting a lead lead feeding mechanism 22 to the front end side of a cylindrical lead tank 21 for feeding out a stored lead lead x forward.
The mechanical pencil core 20 is connected to the front end side of the slide body 51 of the core retracting operation body 50 . In the mechanical pencil core 20, the writing part 22a is inserted into and locked to the front end opening of the tip part 11a. Feed out the lead core from.

また、ボールペン用中芯３０は、インクが充填されたインクタンク３１の前端側に、最前端部に転写ボールを抱持した筆記部３２（ボールペンチップ）を接続してなる。このボールペン用中芯３０は、中芯出没操作体６０の前端に接続されており、中芯出没操作体６０の前進に伴い前進して、筆記部３２を先口部１１ａから突出する。
なお、複数のボールペン用中芯３０のうち、その一部又は全部は、電子ペン用筆記芯等、図示例以外の機能を有する中芯（リフィール）や筆記芯に置換することが可能である。 The core 30 for a ballpoint pen is formed by connecting a writing part 32 (ballpoint pen tip) holding a transfer ball at the front end to the front end of an ink tank 31 filled with ink. The core 30 for a ballpoint pen is connected to the front end of the core retractable operating body 60, and advances as the core retractable operating body 60 advances to project the writing portion 32 from the tip portion 11a.
Some or all of the plurality of cores 30 for ballpoint pens can be replaced with cores (refills) or writing cores having functions other than those shown in the drawings, such as writing cores for electronic pens.

付勢部材４０は、シャープペンシル用中芯２０とボールペン用中芯３０の後端側に、それぞれ環状に装着された圧縮コイルバネである。
この付勢部材４０の前端部は、中芯保持部材１４によって受けられる。また、付勢部材４０の後端部は、中芯出没操作体５０又は中芯出没操作体６０における軸筒内前端側の部分に環状に嵌め合わせられる。 The biasing member 40 is a compression coil spring annularly attached to the rear end sides of the core 20 for the mechanical pencil and the core 30 for the ballpoint pen.
A front end portion of the biasing member 40 is received by the core holding member 14 . In addition, the rear end portion of the biasing member 40 is annularly fitted to a portion of the core retracting operating body 50 or the core retracting operating body 60 on the front end side in the shaft cylinder.

一方の中芯出没操作体５０は、開口部１２ａに嵌り合って前後へ進退するスライド体５１と、該スライド体５１に支持されて軸筒外へ露出したクリップ体５２と、クリップ体５２を閉鎖方向へ付勢する付勢部材５３と、後述する鉛芯補給路開閉部材７０及び開閉操作体８０とを備え、支点部Ｐよりも後側の部分が軸筒径内方向へ押動されることによって、支点部Ｐよりも前側の部分を軸筒外周面から離隔させて開放する開閉操作機能付クリップを構成している。 On the other hand, the core retracting operation body 50 includes a slide body 51 that fits in the opening 12a and moves back and forth, a clip body 52 that is supported by the slide body 51 and exposed to the outside of the shaft cylinder, and that closes the clip body 52. A biasing member 53 for biasing in the direction, a lead core replenishment passage opening/closing member 70 and an opening/closing operation body 80 which will be described later are provided, and the portion on the rear side of the fulcrum P is pushed inward in the axial cylinder diameter direction. Thus, a clip with an opening/closing operation function is constructed in which the portion on the front side of the fulcrum portion P is separated from the outer peripheral surface of the shaft cylinder and opened.

スライド体５１は、長孔状の開口部１２ａに沿って前後へスライドするように形成される。
このスライド体５１は、開口部１２ａ内で軸筒１０周壁の被係止部（図示せず）に係止されるように後方へ突出した被係止部５１ａ（図２参照）や、クリップ体５２を回動可能に支持する支持部５１ｂ、支持部５１ｂよりも後側で付勢部材５３を伸縮自在に保持する付勢部材保持部５１ｃ、支持部５１ｂと付勢部材保持部５１ｃの間に設けられ鉛芯補給路開閉部材７０の軸筒径方向へのスライドを案内するガイド部５１ｄ、シャープペンシル用中芯２０へ鉛芯ｘを補給するための鉛芯補給路５１ｅ等を一体に具備する。 The slide body 51 is formed to slide forward and backward along the elongated opening 12a.
The sliding body 51 includes a locked portion 51a (see FIG. 2) protruding rearward so as to be locked by a locked portion (not shown) of the peripheral wall of the barrel 10 in the opening 12a, and a clip body. 52 rotatably, a biasing member holding portion 51c that holds the biasing member 53 on the rear side of the supporting portion 51b so as to extend and contract, and between the supporting portion 51b and the biasing member holding portion 51c. A guide portion 51d provided to guide the sliding of the lead lead replenishing path opening/closing member 70 in the radial direction of the shaft cylinder, a lead lead replenishing path 51e for replenishing the mechanical pencil core 20 with the lead x, etc. are integrally provided. .

支持部５１ｂは、クリップ幅方向（図４（ａ’）（ｂ’）及び図５（ｃ’）の左右方向）の両側にそれぞれ設けられ、クリップ体５２の軸部５２ａ２と協働してクリップ体５２を回動させる際の支点部Ｐを構成する。各支持部５１ｂは、クリップ体５２の軸部５２ａ２を回転可能に抱持する凹状に形成される。
付勢部材保持部５１ｃは、クリップ体５２の後端側を弾発する付勢部材５３（図示例によれば圧縮コイルバネ）の一端側を抱持して受けるように凹状に形成される。 The support portions 51b are provided on both sides in the clip width direction (left and right directions in FIGS. 4(a′), (b′) and FIG. 5(c′)), and cooperate with the shaft portion 52a2 of the clip body 52 to hold the clip. It constitutes a fulcrum P for rotating the body 52 . Each support portion 51b is formed in a concave shape that rotatably holds the shaft portion 52a2 of the clip body 52. As shown in FIG.
The biasing member holding portion 51c is formed in a concave shape so as to hold and receive one end of the biasing member 53 (a compression coil spring in the illustrated example) that repels the rear end side of the clip body 52 .

ガイド部５１ｄは、軸筒径方向外側を開口するとともに、軸筒径方向内側を後述する鉛芯補給路５１ｅに連通した貫通孔状（図示例によれば、スリット孔状）に形成される。 The guide portion 51d is formed in the shape of a through hole (in the illustrated example, a slit shape) which opens on the radially outer side of the shaft cylinder and communicates on the radially inner side of the shaft cylinder with a lead supply path 51e described later.

鉛芯補給路５１ｅは、支持部５１ｂよりも軸筒径方向内側に位置し、軸筒軸方向へ延設された貫通孔状に形成される。
この鉛芯補給路５１ｅの前端側は、円筒状の内周面に形成され、シャープペンシル用中芯２０の後端部に環状に嵌り合う。
鉛芯補給路５１ｅの最後端部は、後方向きに開口しており、鉛芯供給口５１ｅ１として機能する（図４参照）。 The lead supply path 51e is located inside the support portion 51b in the radial direction of the barrel and is formed in the shape of a through hole extending in the axial direction of the barrel.
The front end side of the lead lead supply path 51e is formed on the inner peripheral surface of a cylinder, and is annularly fitted to the rear end portion of the mechanical pencil core 20. As shown in FIG.
The rearmost end of the lead supply path 51e is open rearward and functions as a lead supply port 51e1 (see FIG. 4).

また、鉛芯補給路５１ｅにおける前後方向の途中部分には、上述したガイド部５１ｄに連通する開口５１ｅ２が形成される。 An opening 51e2 that communicates with the guide portion 51d is formed in the middle of the lead supply path 51e in the front-rear direction.

クリップ体５２は、逆凹状の横断面を、軸筒１０の外周面に沿って前後方向へ延設した長尺状の部材であり、その後部側に、軸筒径方向へ貫通する貫通係合部５２ａと、貫通係合部５２ａよりも後側で付勢部材５３を受ける受部５２ｂと、鉛芯抜け防止部５２ｃとを有する。
また、クリップ体５２の表面側において、貫通係合部５２ａよりも前側と後側の部分は、それぞれ、凹状に形成される。そして、前側の凹状部分の底面には、開閉操作体８０を前方へ乗り越えさせて係止する前側係脱突起５２ｅが設けられ、後側の凹状部分の底面には、開閉操作体８０を後方へ乗り越えさせて係止する後側係脱突起５２ｆが設けられる。前側係脱突起５２ｅと後側係脱突起５２ｆは、それぞれ、クリップ幅方向へわたる突起である。 The clip body 52 is an elongated member having an inverted concave cross section extending in the front-rear direction along the outer peripheral surface of the barrel 10. The clip body 52 has a penetrating engagement that penetrates in the barrel radial direction on the rear side. It has a portion 52a, a receiving portion 52b that receives the biasing member 53 on the rear side of the through-engagement portion 52a, and a lead core removal preventing portion 52c.
Further, on the surface side of the clip body 52, the portions on the front side and the rear side of the through engagement portion 52a are respectively formed in a concave shape. On the bottom surface of the front concave portion, there is provided a front engaging/disengaging protrusion 52e that engages the opening/closing operation body 80 by riding over it forward. A rear engagement/disengagement projection 52f is provided for overriding and locking. The front engaging/disengaging protrusion 52e and the rear engaging/disengaging protrusion 52f are protrusions extending in the clip width direction.

貫通係合部５２ａは、軸筒径方向外側から鉛芯補給路開閉部材７０の開閉片部７１を挿入するとともに、軸筒径方向内側からスライド体５１の支持部５１ｂ及びガイド部５１ｄ等を挿入するように形成される（図２参照）。 The opening/closing piece 71 of the lead lead supply path opening/closing member 70 is inserted into the through engaging portion 52a from the radially outer side of the barrel, and the support portion 51b and the guide portion 51d of the slide body 51 are inserted from the radially inner side of the barrel. (see FIG. 2).

この貫通係合部５２ａは、開閉操作体８０を前後方向へスライド可能であってかつ軸筒径方向外側へ抜けないように保持している。
詳細に説明すれば、この貫通係合部５２ａの内側には、開閉操作体８０を前後方向へスライド可能にする収納空間が確保される。また、貫通係合部５２ａの内側面には、開閉操作体８０を前後スライド可能かつ引き抜け不能に係合する被係合部５２ａ１が複数設けられる。そして、これら被係合部５２ａ１よりも軸筒径方向内側には、軸部５２ａ２が設けられる。 The through engaging portion 52a holds the opening/closing operation body 80 so as to be slidable in the front-rear direction and not to come off radially outward of the barrel.
More specifically, inside the through-engagement portion 52a, a storage space is secured in which the opening/closing operation body 80 can be slid in the front-rear direction. Further, a plurality of engaged portions 52a1 are provided on the inner side surface of the penetrating engaging portion 52a to engage with the opening/closing operation body 80 so as to be slidable back and forth and not to be pulled out. A shaft portion 52a2 is provided radially inward of the engaged portions 52a1.

被係合部５２ａ１は、クリップ体５２における両側の内側面にそれぞれ設けられる。
各被係合部５２ａ１は、開閉操作体８０の前後複数のスライド突起８２ａに対応するように、前後方向に間隔を置いて複数設けられる。
各被係合部５２ａ１は、前後方向へわたって貫通係合部５２ａの内側面から突出する長尺突起状に形成される。 The engaged portions 52a1 are provided on both inner side surfaces of the clip body 52, respectively.
A plurality of engaged portions 52 a 1 are provided at intervals in the front-rear direction so as to correspond to the plurality of front-rear slide projections 82 a of the opening/closing operation body 80 .
Each engaged portion 52a1 is formed in the shape of an elongated projection that protrudes from the inner surface of the through-engagement portion 52a in the front-rear direction.

軸部５２ａ２は、スライド体５１の両側の支持部５１ｂに嵌り合うように、貫通係合部５２ａの両側の内側面にそれぞれ設けられる。
この軸部５２ａ２及び支持部５１ｂは、クリップ体５２を開閉回動させる支点部Ｐとして機能する。 The shaft portions 52 a 2 are provided on both inner side surfaces of the through engagement portion 52 a so as to fit with the support portions 51 b on both sides of the slide body 51 .
The shaft portion 52a2 and the support portion 51b function as a fulcrum portion P that rotates the clip body 52 to open and close.

受部５２ｂは、貫通係合部５２ａよりも後側で、付勢部材５３（図示例によれば、圧縮コイルバネ）の軸筒径方向外側の端面を受けるように、平坦面状に形成される。 The receiving portion 52b is formed on the rear side of the through-engagement portion 52a so as to receive a radially outer end face of the biasing member 53 (a compression coil spring in the illustrated example). .

鉛芯抜け防止部５２ｃは、クリップ体５２における支点部Ｐよりも後側部分が軸筒径方向内側へ押動された場合に（図５参照）、鉛芯補給路５１ｅの後方の延長線上に位置するように設けられる。
図示例によれば、この鉛芯抜け防止部５２ｃは、クリップ体５２の平板状の後端壁を軸筒径方向内側へ延設してなる。 When the portion of the clip body 52 rearward of the fulcrum P is pushed radially inward of the shaft cylinder (see FIG. 5), the lead core removal prevention portion 52c is positioned on the rear extension line of the lead lead supply passage 51e. provided to be positioned.
According to the illustrated example, the lead core removal preventing portion 52c is formed by extending the flat rear end wall of the clip body 52 radially inwardly of the shaft cylinder.

また、他方の中芯出没操作体６０は、開口部１２ｂに嵌り合って前後へ進退するように設けられる。この中芯出没操作体６０は、軸筒径方向外側へ突出する操作部６１（図４参照）が前方へ押圧されることで前進し、後端側の被係止部（図示せず）を軸筒１０周壁の被係止部（図示せず）に係止して、筆記部３２の突出状態を保持する。
なお、選択されたシャープペンシル用中芯２０又はボールペン用中芯３０を軸筒１０前端から突出させたり没入したりする構造は、周知の多機能筆記具の構造を適用することが可能である。 On the other hand, the other core protruding/retracting operating body 60 is provided so as to fit in the opening 12b and move back and forth. The core retracting operating body 60 advances when an operating portion 61 (see FIG. 4) protruding radially outwardly of the shaft cylinder is pressed forward, and pushes a locked portion (not shown) on the rear end side. The writing part 32 is retained in the projecting state by being locked to a locked part (not shown) of the peripheral wall of the barrel 10 .
The structure for projecting or retracting the selected mechanical pencil core 20 or ballpoint pen core 30 from the front end of the barrel 10 can be applied to the structure of a well-known multifunctional writing instrument.

また、鉛芯補給路開閉部材７０は、軸筒径方向へ延設された開閉片部７１と、この開閉片部の径方向外側の端部から前方へ延設された係合片部７２とを一体に具備した側面視略Ｌ字状に構成される。 The lead supply path opening/closing member 70 includes an opening/closing piece portion 71 extending in the radial direction of the shaft cylinder, and an engaging piece portion 72 extending forward from the radially outer end of the opening/closing piece portion. is integrally formed in a substantially L-shape when viewed from the side.

開閉片部７１は、ガイド部５１ｄに嵌り合って軸筒径方向へ移動可能な板状に形成される。この開閉片部７１の一端側は、鉛芯補給路開閉部材７０全体が軸筒径方向内側へスライドするのに伴い、鉛芯補給路５１ｅへ侵入して該鉛芯補給路５１ｅを閉鎖する。この閉鎖状態では、鉛芯補給路５１ｅ内における鉛芯ｘの移動が、開閉片部７１の先端側部分によって阻まれる。 The opening/closing piece portion 71 is formed in a plate-like shape that fits in the guide portion 51d and is movable in the radial direction of the shaft cylinder. One end of the opening/closing piece 71 enters the lead supply path 51e and closes the lead supply path 51e as the lead supply path opening/closing member 70 slides radially inward. In this closed state, the movement of the lead x within the lead lead supply path 51e is blocked by the distal end portion of the opening/closing piece 71. As shown in FIG.

また、開閉片部７１の前記一端側は、鉛芯補給路開閉部材７０全体が軸筒径方向外側へスライドするのに伴い、鉛芯補給路５１ｅを開放する。この開放状態では、鉛芯補給路５１ｅ内を鉛芯ｘが自由に進退可能である。 The one end of the opening/closing piece 71 opens the lead supply path 51e as the entire lead supply path opening/closing member 70 slides radially outward. In this open state, the lead lead x can freely advance and retreat in the lead lead supply path 51e.

係合片部７２は、支点部Ｐの上方側で前方へ板状に延設され、開閉操作体８０の内側に嵌り合っている。 The engaging piece portion 72 extends forward in a plate shape above the fulcrum portion P and fits inside the opening/closing operation body 80 .

この係合片部７２の両側面には、それぞれ、開閉操作体８０の傾斜係合部８２ｂに嵌り合って滑動する滑動部７３が設けられる。
滑動部７３は、クリップ幅方向へ突出する円柱状の突起である。この滑動部７３は、開閉操作体８０の前後方向のスライドに伴い、傾斜係合部８２ｂに摺接して、鉛芯補給路５１ｅの開閉方向（図示例によれば、軸筒径方向）へ移動する。 Both side surfaces of the engaging piece 72 are provided with sliding portions 73 that engage with the inclined engaging portions 82b of the opening/closing operation body 80 and slide.
The sliding portion 73 is a cylindrical protrusion that protrudes in the width direction of the clip. As the opening/closing operation body 80 slides in the front-rear direction, the sliding portion 73 slides in contact with the inclined engaging portion 82b and moves in the opening/closing direction of the lead lead supply path 51e (in the illustrated example, in the shaft cylinder radial direction). do.

開閉操作体８０は、一方の中芯出没操作体５０に設けられ、前方へ押動されることで鉛芯補給路５１ｅを閉鎖し、後方へ押動されることで鉛芯補給路５１ｅを開放する。
この開閉操作体８０は、クリップ体５２の表面側に露出する操作片部８１と、この操作片部８１から軸筒径方向内側へ突出する係合片部８２とを有し、図示例によれば、横断面逆凹状に形成される。 The opening/closing operation body 80 is provided on one core retracting operation body 50, and is pushed forward to close the lead supply path 51e, and pushed backward to open the lead supply path 51e. do.
The opening/closing operation body 80 has an operation piece portion 81 exposed on the surface side of the clip body 52, and an engaging piece portion 82 projecting radially inward from the operation piece portion 81. For example, the cross section is formed in an inverted concave shape.

操作片部８１は、平板状に形成され、その表面に、指先等を掛け易くするための突起８１ａを有する（図２参照）。
操作片部８１の裏面には、その前端側と後端側に、係止突起８１ｂ，８１ｃが設けられる（図３参照）。 The operation piece portion 81 is formed in a flat plate shape, and has a projection 81a on its surface for facilitating hooking of a fingertip or the like (see FIG. 2).
Locking protrusions 81b and 81c are provided at the front end side and the rear end side of the rear surface of the operation piece portion 81 (see FIG. 3).

前側の乗越え係止突起８１ｂは、開閉操作体８０の前進時に、クリップ体５２の前側係脱突起５２ｅ（図２参照）を前方へ乗り越えて、開閉操作体８０を前寄り位置（図４（ａ）参照）に保持し、開閉操作体８０の後退時には前側係脱突起５２ｅを後方へ乗り越える。 When the opening/closing operation body 80 moves forward, the front jumping locking projection 81b climbs forward over the front engaging/disengaging projection 52e (see FIG. 2) of the clip body 52, and moves the opening/closing operation body 80 to the forward position (FIG. 4(a). )), and when the opening/closing operation body 80 moves backward, it climbs over the front engagement/disengagement projection 52e rearward.

後側の乗越え係止突起８１ｃは、開閉操作体８０の後退時に、クリップ体５２の後側係脱突起５２ｆを後方へ乗り越えて、開閉操作体８０を後寄り位置（図４（ｂ））に保持し、開閉操作体８０の前進時には後側係脱突起５２ｆを前方へ乗り越える。 When the opening/closing operation body 80 moves backward, the rear jumping locking projection 81c rides over the rear engaging/disengaging projection 52f of the clip body 52, and moves the opening/closing operation body 80 to the rearward position (FIG. 4(b)). When the opening/closing operation body 80 moves forward, it climbs over the rear engaging/disengaging protrusion 52f.

また、係合片部８２は、操作片部８１におけるクリップ幅方向の一方側と他方側から軸筒径内方向へ突出するように二つ設けられる。 Two engaging pieces 82 are provided so as to protrude radially inward of the shaft cylinder from one side and the other side of the operation piece 81 in the clip width direction.

各係合片部８２における軸筒径方向内側の端部には、前後方向へわたってクリップ幅方向へ突出するスライド突起８２ａが設けられる。このスライド突起８２ａは、前後方向に間隔を置いて二つ設けられる。
各スライド突起８２ａは、クリップ体５２の被係合部５２ａ１に対し、軸筒径方向内側へ乗り越えるようにして係止される。
この係止状態において、各係合片部８２は、クリップ体５２に相対し、前後方向へスライド可能であって且つ引抜けることのないように保持される。 A slide projection 82a that projects in the width direction of the clip in the front-rear direction is provided at the radially inner end of each engaging piece 82 . Two slide protrusions 82a are provided at intervals in the front-rear direction.
Each slide protrusion 82a is engaged with the engaged portion 52a1 of the clip body 52 so as to climb over it inward in the radial direction of the shaft cylinder.
In this locked state, each engaging piece 82 faces the clip body 52, is slidable in the front-rear direction, and is held so as not to be pulled out.

また、各係合片部８２には、軸筒軸方向に対し傾斜した傾斜係合部８２ｂが設けられる。そして、この傾斜係合部８２ｂの端部側には、逃げ部８２ｃが設けられる。 In addition, each engaging piece 82 is provided with an inclined engaging portion 82b that is inclined with respect to the axial direction of the barrel. A relief portion 82c is provided on the end side of the inclined engagement portion 82b.

傾斜係合部８２ｂは、前方へ行くにしたがって軸筒１０の外周面から離れるように傾斜した貫通状の長孔である。この傾斜係合部８２ｂには、内側から鉛芯補給路開閉部材７０の滑動部７３が挿入される。
図３中の符号８２ｄは、鉛芯補給路開閉部材７０と開閉操作体８０を嵌め合わせる際に、滑動部７３を傾斜係合部８２ｂへ導く凹溝である。 The inclined engagement portion 82b is a through hole that is inclined away from the outer peripheral surface of the barrel 10 toward the front. The sliding portion 73 of the lead lead supply path opening/closing member 70 is inserted into the inclined engagement portion 82b from the inside.
Reference numeral 82d in FIG. 3 denotes a concave groove that guides the sliding portion 73 to the inclined engaging portion 82b when the lead lead supply path opening/closing member 70 and the opening/closing operation body 80 are fitted together.

逃げ部８２ｃは、各傾斜係合部８２ｂの前端に連続して前方へ延設された貫通状の長孔である。この逃げ部８２ｃは、開閉操作体８０が後寄り位置にある状態でクリップ体５２が開放方向へ回動した場合に、滑動部７３に嵌り合うように形成される（図５参照）。
この逃げ部８２ｃは、図示例によれば、前方へ行くにしたがって軸筒１０の外周面から離れるように傾斜しており、その傾斜角度は、傾斜係合部８２ｂの傾斜角度よりも小さい。 The relief portion 82c is a through-shaped elongated hole continuously extending forward from the front end of each inclined engagement portion 82b. The escape portion 82c is formed so as to fit into the sliding portion 73 when the clip body 52 rotates in the opening direction while the opening/closing operation body 80 is in the rearward position (see FIG. 5).
According to the illustrated example, the escape portion 82c is inclined away from the outer peripheral surface of the barrel 10 as it goes forward, and the inclination angle thereof is smaller than the inclination angle of the inclined engagement portion 82b.

上記構成の中芯出没操作体５０の組み立て手順について説明すれば、先ず、鉛芯補給路開閉部材７０を開閉操作体８０に組付け、次に、これら開閉操作体８０及び鉛芯補給路開閉部材７０を、クリップ体５２に組み込む。
そして、付勢部材５３をスライド体５１に組付け、一体的な開閉操作体８０、鉛芯補給路開閉部材７０及びクリップ体５２を、スライド体５１に組付ける。 The procedure for assembling the core retractable operation body 50 having the above structure will be described. 70 is incorporated into clip body 52 .
Then, the urging member 53 is assembled to the slide body 51 , and the integrated opening/closing operation body 80 , the lead core supply path opening/closing member 70 and the clip body 52 are assembled to the slide body 51 .

次に上記構成の筆記具Ａについて、その特徴的な作用効果を詳細に説明する。
図４（ａ）（ａ’）に示すように、開閉操作体８０が前寄り位置にある初期状態では、滑動部７３が傾斜係合部８２ｂ内の後端側に位置し、鉛芯補給路開閉部材７０の開閉片部７１が鉛芯補給路５１ｅを閉鎖し、芯タンク２１及び鉛芯補給路５１ｅ内にある鉛芯ｘが後方へ抜けないように保持される。 Next, the characteristic functions and effects of the writing instrument A configured as described above will be described in detail.
As shown in FIGS. 4(a) and 4(a'), in the initial state where the opening/closing operation body 80 is at the forward position, the sliding portion 73 is positioned at the rear end side of the inclined engaging portion 82b, and the lead lead supply path is closed. The opening/closing piece 71 of the opening/closing member 70 closes the lead supply path 51e, and holds the lead tank 21 and the lead x in the lead supply path 51e so as not to come out backward.

開閉操作体８０が、クリップ体５２に対し後方へ移動すると、傾斜係合部８２ｂが滑動部７３に摺動して、滑動部７３が軸筒径方向外側へ移動する。
開閉操作体８０が図４（ｂ）に示す後寄り位置まで移動した状態では、滑動部７３が傾斜係合部８２ｂ内の前端側に位置し、鉛芯補給路開閉部材７０の開閉片部７１が鉛芯補給路５１ｅを開放する。したがって、この状態では、鉛芯補給路５１ｅ内へ、その後方側から鉛芯ｘを供給することができる。 When the opening/closing operation body 80 moves rearward with respect to the clip body 52, the inclined engaging portion 82b slides on the sliding portion 73, and the sliding portion 73 moves radially outward.
When the opening/closing operation body 80 has moved to the rearward position shown in FIG. opens the lead lead supply path 51e. Therefore, in this state, the lead lead x can be supplied into the lead lead supply path 51e from the rear side.

このように、筆記具Ａによれば、開閉操作体８０を前後にスライドする操作により鉛芯補給路５１ｅを容易に開閉することができる上、鉛芯補給路５１ｅの開閉状態を、開閉操作体８０が前寄り位置にあるか後寄り位置にあるかによって容易に把握することができる。 As described above, according to the writing instrument A, the lead lead supply path 51e can be easily opened and closed by sliding the opening/closing operation body 80 back and forth. can be easily grasped by whether it is in the forward position or the rearward position.

しかも、開閉操作体８０を前方へスライドする操作により鉛芯補給路５１ｅが閉鎖するため、開閉操作体８０を前進させてシャープペンシル用中芯２０を軸筒１０前端から突出させる操作や、開閉操作体８０をノックしてシャープペンシル用中芯２０から鉛芯ｘを繰り出す操作などの際に、手指が開閉操作体８０に触れて、鉛芯補給路開閉部材７０が開動してしまう誤操作を防ぐことができる。 Moreover, since the opening/closing operation body 80 is slid forward to close the lead lead supply path 51e, the operation of advancing the opening/closing operation body 80 to project the mechanical pencil core 20 from the front end of the barrel 10, or the opening/closing operation, is performed. To prevent an erroneous operation in which a lead lead replenishing path opening/closing member 70 is opened by touching an opening/closing operation body 80 with fingers when performing an operation such as knocking a body 80 to draw out a lead x from a core 20 for a mechanical pencil. can be done.

また、前記後寄り位置のまま、クリップ体５２の後端側が軸筒径方向内側へ押圧されたり、クリップ体５２前端側と軸筒１０の間に物が挟まれたりして、クリップ体５２の前端側が軸筒１０から離れるようにして回動した場合、滑動部７３は、傾斜係合部８２ｂ内から逃げ部８２ｃ内へ移動する（図５（ｃ）参照）。
このため、略逆Ｌ字状の鉛芯補給路開閉部材７０が、クリップ体５２の回動力を受けて損傷するのを防ぐことができる。 In addition, the rear end side of the clip body 52 may be pressed radially inward in the shaft cylinder while remaining at the rearward position, or an object may be caught between the front end side of the clip body 52 and the shaft cylinder 10 , causing the clip body 52 to become stuck. When the front end side is rotated away from the barrel 10, the sliding portion 73 moves from the inclined engaging portion 82b into the relief portion 82c (see FIG. 5(c)).
Therefore, it is possible to prevent the substantially inverted L-shaped lead core supply path opening/closing member 70 from being damaged by the turning force of the clip body 52 .

また、クリップ体５２の開放状態においては、クリップ体５２後端の鉛芯抜け防止部５２ｃが、鉛芯補給路５１ｅの後方の延長線上に位置する。このため、鉛芯ｘが開放状態の鉛芯補給路５１ｅ内を後方へ移動して、外部へ抜け出してしまうのを、鉛芯抜け防止部５２ｃによって阻むことができる（図５（ｃ）（ｃ’）参照）。 In the open state of the clip body 52, the lead core removal prevention portion 52c at the rear end of the clip body 52 is positioned on the rear extension line of the lead core supply path 51e. Therefore, it is possible to prevent the lead core x from moving rearward in the open lead core supply path 51e and escaping to the outside by the lead core removal preventing portion 52c (FIGS. 5C and 5C). ')reference).

＜変形例＞
上記実施態様によれば、開閉操作体８０に傾斜係合部８２ｂを設け、鉛芯補給路開閉部材７０に滑動部７３を設けたが、他例としては、前記とは逆に、開閉操作体に滑動部を設け、鉛芯補給路開閉部材に傾斜係合部を設けることも可能である。 <Modification>
According to the above-described embodiment, the opening/closing operation body 80 is provided with the inclined engaging portion 82b, and the lead lead supply path opening/closing member 70 is provided with the sliding portion 73. It is also possible to provide a sliding portion on the lead core replenishment path opening/closing member and to provide an inclined engagement portion on the lead lead replenishment path opening/closing member.

上記実施態様によれば、中芯出没操作体５０に開閉操作体８０及び鉛芯補給路開閉部材７０を設けたが、他例としては、軸筒の周壁に開閉操作体及び鉛芯補給路開閉部材を設けることも可能である。 According to the above embodiment, the opening/closing operation body 80 and the lead lead supply path opening/closing member 70 are provided on the core retracting operation body 50. As another example, the opening/closing operation body and the lead lead supply path opening/closing member are provided on the peripheral wall of the barrel. It is also possible to provide a member.

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。 Moreover, 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
２０：シャープペンシル用中芯
３０：ボールペン用中芯
４０：付勢部材
５０，６０：中芯出没操作体
５１：スライド体
５１ｂ：支持部（支点部Ｐ）
５１ｅ：鉛芯補給路
５２：クリップ体
５２ａ２：軸部（支点部Ｐ）
５２ｃ：鉛芯抜け防止部
７０：鉛芯補給路開閉部材
７３：滑動部
８０：開閉操作体
８２ｂ：傾斜係合部
８２ｃ：逃げ部
Ａ：筆記具
ｘ：鉛芯 10: Axle tube 20: Core for mechanical pencil 30: Core for ballpoint pen 40: Biasing member 50, 60: Core retractable operation body 51: Slide body 51b: Support portion (fulcrum portion P)
51e: lead core supply path 52: clip body 52a2: shaft portion (fulcrum portion P)
52c: lead lead removal prevention part 70: lead lead supply path opening/closing member 73: sliding part 80: opening/closing operation body 82b: inclined engagement part 82c: relief part A: writing instrument x: lead lead

Claims (6)

軸筒と、前記軸筒内に設けられるとともに収容した鉛芯を前方へ繰出すシャープペンシル用中芯と、前記シャープペンシル用中芯への鉛芯補給路を開閉するように設けられた鉛芯補給路開閉部材と、前記軸筒の外周側で前後方向へスライドする開閉操作体とを備え、
前記開閉操作体のスライドに連動して、前記鉛芯補給路開閉部材を開閉動作させるようにしたことを特徴とする筆記具。 A barrel, a core for a mechanical pencil that is provided in the barrel and feeds out the stored lead lead forward, and a lead that is provided to open and close a lead supply path to the core for the mechanical pencil. a replenishment passage opening/closing member;
A writing utensil characterized in that the lead lead supply path opening/closing member is opened/closed in conjunction with the sliding of the opening/closing operation body. 前記開閉操作体と前記鉛芯補給路開閉部材とのうちの一方には、軸筒軸方向に対し傾斜した傾斜係合部が設けられ、その他方には、前記開閉操作体のスライドに伴い前記傾斜係合部に摺接して、前記鉛芯補給路を開閉する方向へ移動する滑動部が設けられていることを特徴とする請求項１記載の筆記具。 One of the opening/closing operation body and the lead core replenishment path opening/closing member is provided with an inclined engagement portion inclined with respect to the axial direction of the barrel, and the other is provided with an inclined engagement portion that is inclined with respect to the axial direction of the barrel, and the other is provided with the above-mentioned 2. The writing instrument according to claim 1, further comprising a sliding portion that slides in contact with the inclined engagement portion and moves in a direction for opening and closing the lead supply path. 前記傾斜係合部が長孔状に形成され、前記滑動部は、前記傾斜係合部に嵌り合って前記傾斜係合部の延設方向へ滑動するように設けられていることを特徴とする請求項２記載の筆記具。 The inclined engaging portion is formed in an elongated hole shape, and the sliding portion is provided so as to fit in the inclined engaging portion and slide in the extending direction of the inclined engaging portion. The writing instrument according to claim 2. 前記軸筒の外周部に設けられて前後方向へスライド操作可能な中芯出没操作体と、前記シャープペンシル用中芯を後方へ付勢する付勢部材とを備え、前記中芯出没操作体を前記付勢部材の付勢力に抗して前方へ押動する操作により前記シャープペンシル用中芯を前記軸筒の前端から突出させるようにした筆記具であって、
前記開閉操作体は、前記中芯出没操作体に設けられ、前寄り位置で前記鉛芯補給路を閉鎖し、後寄り位置で前記鉛芯補給路を開放することを特徴とする請求項１～３何れか１項記載の筆記具。 a core retractable operating body provided on the outer peripheral portion of the barrel and capable of being slid in the front-rear direction; and a biasing member that biases the mechanical pencil core backward, A writing instrument in which the core for a mechanical pencil is protruded from the front end of the barrel by an operation of pushing forward against the biasing force of the biasing member,
The opening/closing operation body is provided on the core retracting operation body, and closes the lead lead supply path at a forward position and opens the lead lead supply path at a rearward position. 3. The writing instrument according to any one of items 1 to 3. 前記軸筒の外周部に設けられて前後方向へスライド操作可能な中芯出没操作体と、前記シャープペンシル用中芯を後方へ付勢する付勢部材とを備え、前記中芯出没操作体を前記付勢部材の付勢力に抗して前方へ押動する操作により前記シャープペンシル用中芯を前記軸筒の前端から突出させるようにした筆記具であって、
前記開閉操作体は、前記中芯出没操作体に設けられ、
前記中芯出没操作体は、支点部よりも後側が軸筒径方向内側へ押動される操作により同支点部よりも前側を軸筒外周面から離隔する開閉操作機能付きのクリップ体を具備し、
前記傾斜係合部には、前記クリップ体を開放した際に前記滑動部に嵌り合う逃げ部が設けられていることを特徴とする請求項２又は３記載の筆記具。 a core retractable operating body provided on the outer peripheral portion of the barrel and capable of being slid in the front-rear direction; and a biasing member that biases the mechanical pencil core backward, A writing instrument in which the core for a mechanical pencil is protruded from the front end of the barrel by an operation of pushing forward against the biasing force of the biasing member,
The opening and closing operation body is provided on the core retraction operation body,
The core retracting operation body has a clip body with an opening/closing operation function that separates the front side of the fulcrum from the outer peripheral surface of the barrel by an operation in which the rear side of the fulcrum is pushed radially inward of the barrel. ,
4. The writing instrument according to claim 2, wherein the inclined engaging portion is provided with a relief portion that fits into the sliding portion when the clip body is released. 前記クリップ体には、前記支点部よりも後側の部分が軸筒径方向内側へ押動された場合に前記鉛芯補給路の後方の延長線上に位置するように、鉛芯抜け防止部が設けられていることを特徴とする請求項５記載の筆記具。 The clip body has a lead core drop-out preventing portion that is positioned on the rear extension line of the lead core supply path when the portion rearward of the fulcrum portion is pushed radially inward of the shaft cylinder. 6. A writing instrument according to claim 5, characterized in that it is provided with.

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