JP4830353B2 - Writing instrument - Google Patents

Description

本発明は、軸筒に対して筆記体を前後動可能に配置した筆記具に関する。   The present invention relates to a writing instrument in which a writing body is arranged to be movable back and forth with respect to a shaft cylinder.

１例として、歯車機構を使用し芯の繰り出しを行うシャープペンシルがある。以下、詳述する。鉛筆芯を保持するチャックの側面には軸方向にラックが形成されている。そのチャックは軸筒内に摺動自在に収容されている。また、そのチャックのつばと軸筒内面の段部との間にはチャックを尾端方向へ押圧するばねが張架されており、さらに、軸筒内面の段部によって軸方向の移動範囲が制限された締付環が前記チャックに嵌合されている。また、前記軸筒には前記ラックに噛合う扇形歯車が回転自在に配置されていると共に、軸筒の側面にはその軸と直角な方向へ移動し得るように取付けたカバーの内面に前記扇形歯車に突設した腕の先端を対向させて設けている。つまり、そのカバーを押圧することによって歯車を回転させ、その歯車の回転によって前記ラックと共にチャックを軸方向へ移動させて鉛筆芯の繰り出しを行うものである。
実開昭４８−１１００３２号公報 One example is a mechanical pencil that uses a gear mechanism to feed out the lead. Details will be described below. A rack is formed in the axial direction on the side surface of the chuck for holding the pencil lead. The chuck is slidably accommodated in the shaft cylinder. In addition, a spring that presses the chuck toward the tail end is stretched between the collar of the chuck and the step on the inner surface of the shaft tube, and the axial movement range is limited by the step on the inner surface of the shaft tube. The tightened ring is fitted to the chuck. In addition, a fan-shaped gear meshing with the rack is rotatably disposed on the shaft cylinder, and the fan-shaped gear is mounted on an inner surface of a cover attached to a side surface of the shaft cylinder so as to be movable in a direction perpendicular to the shaft. The tip of the arm protruding from the gear is provided opposite to it. That is, by pressing the cover, the gear is rotated, and by rotating the gear, the chuck is moved together with the rack in the axial direction to feed out the pencil lead.
Japanese Utility Model Publication No. 48-11003

しかし、上記の従来技術にあっては、組み立て時に、扇形歯車とラックとの位置合わせが必要となり、その組み立てに時間を費やしてしまい、その結果、生産性が悪いものとなってしまっていた。つまり、不使用時における鉛筆芯の繰り出しが行われない状態と、使用時における鉛筆芯の繰り出しが行われる状態、つまり、その双方の位置を考慮し、前記扇形歯車とラックを位置合わせし組み立てなければならなかった。
また、カバーと扇形歯車の腕が接触しているため、そのカバーによる扇形歯車の押圧操作量も考慮しつつ、前記扇形歯車とラックを位置合わせし組み立てなければならず、さらに生産性を悪くしてしまっていた。 However, in the above-described prior art, alignment of the sector gear and the rack is required at the time of assembly, and time is spent for the assembly, resulting in poor productivity. In other words, in consideration of both the state where the pencil lead is not extended when not in use and the state where the pencil lead is extended when used, i.e., the position of both, the sector gear and the rack must be aligned and assembled. I had to.
In addition, since the cover and the arm of the sector gear are in contact with each other, the sector gear and the rack must be aligned and assembled while taking into consideration the pressing operation amount of the sector gear by the cover, further reducing the productivity. It was.

本発明は、芯の把持・開放を行うチャック体と、そのチャック体を前端に固定したスライド部材を有する芯の繰り出し機構を軸筒に対して前後動可能に配置した筆記具であって、前記スライド部材に係合受部を設け、その係合受部に係合・非係合する係合部を操作体に設けると共に、前記スライド部材を弾発部材によって後方に付勢し、また、前記軸筒の前部側面に開口部を形成し、その開口部の縁部であって、前記軸筒の外面に円周突部を形成して、その円周突部に前記操作体を嵌め込ませ、前記操作体を前記軸筒に対して回転自在に配置し、その操作体の回転により前記係合受部と前記係合部との係合・非係合をなし、前記係合受部と前記係合部との係合により前記スライド部材が弾発部材の弾発力に抗して前進し、また、前記係合受部と前記係合部との非係合により前記スライド部材が弾発部材の弾発力によって後退することを要旨とする。 The present invention includes a chuck body which performs gripping and opening of the core, a writing instrument disposed rotatably in forward and backward feeding mechanism of the core relative to the barrel with a slide member fixed to the chuck body in front, the slide An engagement receiving portion is provided on the member , an engagement portion that engages / disengages with the engagement receiving portion is provided on the operating body, the slide member is urged rearward by a resilient member, and the shaft Forming an opening on the front side surface of the cylinder, forming an annular protrusion on an outer surface of the shaft cylinder at an edge of the opening, and fitting the operating body into the circumferential protrusion; The operation body is disposed so as to be rotatable with respect to the shaft cylinder, and the engagement receiving portion and the engagement portion are engaged / disengaged by rotation of the operation body, and the engagement receiving portion and the The sliding member moves forward against the elastic force of the elastic member by engaging with the engaging portion, and the engaging receiving portion The slide member by non-engagement with the engaging portion is summarized in that the retraction by the elastic force of the elastic member.

本発明は、芯の把持・開放を行うチャック体と、そのチャック体を前端に固定したスライド部材を有する芯の繰り出し機構を軸筒に対して前後動可能に配置した筆記具であって、前記スライド部材に係合受部を設け、その係合受部に係合・非係合する係合部を操作体に設けると共に、前記スライド部材を弾発部材によって後方に付勢し、また、前記軸筒の前部側面に開口部を形成し、その開口部の縁部であって、前記軸筒の外面に円周突部を形成して、その円周突部に前記操作体を嵌め込ませ、前記操作体を前記軸筒に対して回転自在に配置し、その操作体の回転により前記係合受部と前記係合部との係合・非係合をなし、前記係合受部と前記係合部との係合により前記スライド部材が弾発部材の弾発力に抗して前進し、また、前記係合受部と前記係合部との非係合により前記スライド部材が弾発部材の弾発力によって後退するので、操作体と前後動手段の位置合わせを極めて容易に行うことができ、その結果、生産性に優れた筆記具を提供することができる。 The present invention includes a chuck body which performs gripping and opening of the core, a writing instrument disposed rotatably in forward and backward feeding mechanism of the core relative to the barrel with a slide member fixed to the chuck body in front, the slide An engagement receiving portion is provided on the member , an engagement portion that engages / disengages with the engagement receiving portion is provided on the operating body, the slide member is urged rearward by a resilient member, and the shaft Forming an opening on the front side surface of the cylinder, forming an annular protrusion on an outer surface of the shaft cylinder at an edge of the opening, and fitting the operating body into the circumferential protrusion; The operation body is disposed so as to be rotatable with respect to the shaft cylinder, and the engagement receiving portion and the engagement portion are engaged / disengaged by rotation of the operation body, and the engagement receiving portion and the The sliding member moves forward against the elastic force of the elastic member by engaging with the engaging portion, and the engaging receiving portion Since the slide member by non-engagement with the engagement portion is retracted by the elastic force of the elastic member, it is possible to perform alignment of the operating tool and the longitudinal motion means very easily, as a result, the productivity An excellent writing instrument can be provided.

第１例を図１〜図４に示し説明する。透明な樹脂材質からなる軸筒１の後部は複数の芯を収容する芯タンク部２となっているが、芯タンク部２を別部材で構成し軸筒１内に配置してもよい。その軸筒１の後部には、消しゴム３とその消しゴム３を覆うようにキャップ部材４が着脱自在に取り付けられている。そのキャップ部材４には、クリップ部５が一体形成されているが、別部材で構成し公知の手段で固定してもよい。また、前記軸筒１の内面と外面の断面形状は、８角形状をなしておりレンズ効果が発揮し得るようになっている。つまり、レンズ効果を得ることによって、興趣性を持たせると共に、芯タンク部２に収容されている芯が拡大され、芯の残量確認が容易に行えるようになるのである。   A first example will be described with reference to FIGS. The rear portion of the shaft cylinder 1 made of a transparent resin material is a core tank portion 2 that accommodates a plurality of cores. An eraser 3 and a cap member 4 are detachably attached to the rear portion of the shaft cylinder 1 so as to cover the eraser 3. The cap member 4 is integrally formed with the clip portion 5, but may be formed of a separate member and fixed by a known means. Moreover, the cross-sectional shape of the inner surface and the outer surface of the shaft tube 1 is an octagonal shape so that the lens effect can be exhibited. In other words, by obtaining the lens effect, it is interesting and the core accommodated in the core tank unit 2 is enlarged so that the remaining amount of the core can be easily checked.

一方、軸筒１の前部内側にはスライド部材６が前後動可能に配置されているが、そのスライド部材６には複数本の芯が収容できる芯通過孔７が形成されている。スライド部材６に複数の芯を収容可能とすることによって、前記芯タンク部２に例えば、繰り出しが可能な長い消しゴムなどを取り付けることができる。尚、スライド部材６の後部に前記芯タンク部２からの芯を１本ごと分離する芯受け部を一体形成してもよいが、芯受け部を別部材で構成しスライド部材に圧入などの手段によって固定してもよい。
また、スライド部材６の前端には、芯の把持・開放を行うチャック体８が固定されており、そのチャック体８の前方部には、チャック体８の開閉を行うチャックリング９が囲撓している。参照符号１０は、前記スライド部材６やチャック体８などを後方に向けて付勢するコイルスプリングなどからなる弾発部材である。
前記チャック体８の前方には、繰り出される芯の後退を規制するシリコーンゴムや二トリルブタジエンゴムなどからなる芯戻り止め部材１１が位置しているが、その芯戻り止め部材１１は前記軸筒１の前端に螺着された先部材１２の内面に圧入された状態で固定されているが、先部材１２の内面に弾性片などとして一体形成などしてもよい。その先部材１２の前端には、金属材質などからなる芯保護管１３が圧入・固定されているが、この芯保護管１３も先部材１２と一体形成してもよい。参照符号１４は、軸筒１の把持する部分に取り付けられたゴム材質などからなる滑り止め性を有するグリップ部材であるが、軸筒１の表面に微細な凹凸などを形成することによって滑り止め性を有するグリップ部として一体形成してもよい。 On the other hand, a slide member 6 is disposed inside the front portion of the shaft cylinder 1 so as to be movable back and forth. The slide member 6 is formed with a core passage hole 7 that can accommodate a plurality of cores. By allowing the slide member 6 to accommodate a plurality of cores, for example, a long eraser that can be fed out can be attached to the core tank portion 2. It should be noted that a core receiving part for separating the cores from the core tank part 2 one by one may be integrally formed at the rear part of the slide member 6, but the core receiving part is constituted by a separate member and means such as press-fitting into the slide member. It may be fixed by.
A chuck body 8 that holds and releases the core is fixed to the front end of the slide member 6, and a chuck ring 9 that opens and closes the chuck body 8 surrounds the front of the chuck body 8. ing. Reference numeral 10 is a resilient member made of a coil spring or the like that urges the slide member 6 or the chuck body 8 toward the rear.
A lead detent member 11 made of silicone rubber, nitrile butadiene rubber, or the like that restricts the retraction of the lead core is located in front of the chuck body 8. Although it is fixed in a state where it is press-fitted into the inner surface of the tip member 12 screwed to the front end of the tip member 12, it may be integrally formed on the inner surface of the tip member 12 as an elastic piece. A core protection tube 13 made of a metal material or the like is press-fitted and fixed to the front end of the tip member 12, but the core protection tube 13 may be formed integrally with the tip member 12. Reference numeral 14 is a grip member having a non-slip property made of a rubber material or the like attached to a gripping portion of the shaft tube 1, but the anti-slip property is formed by forming fine irregularities on the surface of the shaft tube 1. You may integrally form as a grip part which has.

前記スライド部材６の外面の１部には、平坦部１５が形成されている。その平坦部１５の前方には、円柱状の突起（係合受部）１６が形成されている。一方、軸筒１の側面には、開口部１７が形成されており、その開口部１７の縁部には円周突部１８が形成されている。そして、その円周突部１８には円盤状の回転操作体１９が回転自在に嵌まり込んでいるが、円盤状に限定されることはなく四角形状や三角形状、或いは、星型形状であってもよい。具体的には、前記円周突部１８に回転操作体１９の内面に形成された円周溝２０が嵌まり込んでいると共に、前記円周突部１８の上端外周部に形成された２箇所の突起２１に回転操作体１９の円周凹部２２が係合している。これら突起２１と円周凹部２２との係合によって、回転操作体１９の軸筒１からの脱落が防止されている。
また、回転操作体１９の内面には、前記突起１６と係合・非係合する内面突起（係合部）２３が３個形成されているが、それらの内面突起２３は放射状の等間隔な位置、すなわち、正三角形の各頂点の位置に形成されているが、２箇所であってもよく、４箇所、或いは、５箇所などであってもよいが放射状の等間隔な位置に形成するのが好ましい。尚、前記突起１６にリング状の筒体２４を被覆させ、前記回転操作体１９の内面突起２３との係合による摩擦抵抗を低減させてもよい。参照符号２５は、前記回転操作体１９の側面に形成した微細な凹凸部であって、その凹凸部２５によって芯を繰り出す際の操作性を良好なものとしている。つまり、指に対する滑り止め作用を果たしている。 A flat portion 15 is formed on a portion of the outer surface of the slide member 6. A cylindrical projection (engagement receiving portion) 16 is formed in front of the flat portion 15. On the other hand, an opening 17 is formed on the side surface of the shaft tube 1, and a circumferential protrusion 18 is formed on the edge of the opening 17. In addition, a disk-shaped rotary operation body 19 is rotatably fitted in the circumferential protrusion 18, but is not limited to a disk shape, and is a square shape, a triangular shape, or a star shape. May be. Specifically, a circumferential groove 20 formed on the inner surface of the rotary operation body 19 is fitted in the circumferential protrusion 18, and two positions formed on the outer periphery of the upper end of the circumferential protrusion 18. The circumferential recess 22 of the rotary operation body 19 is engaged with the projection 21. Due to the engagement between the protrusions 21 and the circumferential recess 22, the rotary operation body 19 is prevented from falling off the shaft cylinder 1.
Further, on the inner surface of the rotary operation body 19, three inner surface protrusions (engagement portions) 23 that engage / disengage with the protrusions 16 are formed, and these inner surface protrusions 23 are radially spaced at equal intervals. It is formed at the position, that is, the position of each vertex of the equilateral triangle, but it may be two places, four places, five places, etc., but they are formed at radially spaced positions. Is preferred. The protrusion 16 may be covered with a ring-shaped cylinder 24 to reduce the frictional resistance due to the engagement with the inner protrusion 23 of the rotary operation body 19. Reference numeral 25 is a fine concavo-convex portion formed on the side surface of the rotary operation body 19, and the operability when the core is drawn out by the concavo-convex portion 25 is good. In other words, it plays an anti-slip action on the finger.

次に動作について説明する。図１（並びに、図１１）に示す状態から、回転操作体１９を時計方向、或いは、反時計方向に回転させると、回転操作体１９の内面突起２３がスライド部材６の突起１６に係合する。ここで、更に回転操作体１９の回転を行うと前記内面突起２３と突起１６との係合によりスライド部材６が弾発部材１０の弾発力に抗して前進する。このスライド部材６の前進によってチャック体８も前進し、その結果、芯が繰り出される（図１２参照）。
更に、回転操作体１９を回転させると、前記内面突起２３と突起１６との係合が解除され、その結果、スライド部材６は弾発部材１０の弾発力によって復帰する。この時、チャック体８も復帰すると共に、再び芯を把持し、芯の後退が阻止される。この操作を繰り返すことにより、芯は徐々に繰り出されることになる。つまり、回転操作体１９の内面突起２３とスライド部材６の突起１６が間欠的に係合・解除することによって、芯が徐々に繰り出されるのである。また、上記の構成によって係合・解除が間欠的に行われるため、仮に指などが回転操作体１９に触れていたとしても、確実なスライダ６、並びに、チャック体８の復帰動作が得られる。
尚、本例においては、前記の繰り出し操作を行う際、弾発部材１０の付勢力によって回転操作体１９の円周凹部２２の内側面２２ａが円周突部１８の内側面１８ａに押し付けられるようにしてあるが、円周凹部２２の外側面２２ｂが円周突部１８の外側面１８ｂに押し付けられるようにしてもよい。 Next, the operation will be described. When the rotary operation body 19 is rotated clockwise or counterclockwise from the state shown in FIG. 1 (and FIG. 11), the inner surface protrusion 23 of the rotation operation body 19 engages with the protrusion 16 of the slide member 6. . Here, when the rotary operation body 19 is further rotated, the slide member 6 moves forward against the elastic force of the elastic member 10 by the engagement between the inner surface protrusion 23 and the protrusion 16. As the slide member 6 advances, the chuck body 8 also advances, and as a result, the lead is fed out (see FIG. 12).
Further, when the rotary operation body 19 is rotated, the engagement between the inner surface protrusion 23 and the protrusion 16 is released, and as a result, the slide member 6 is restored by the elastic force of the elastic member 10. At this time, the chuck body 8 is also restored, and the core is gripped again to prevent the core from being retracted. By repeating this operation, the lead is gradually drawn out. That is, the inner core protrusion 23 of the rotary operation body 19 and the protrusion 16 of the slide member 6 are intermittently engaged / released, whereby the lead is gradually drawn out. Further, since the engagement / disengagement is intermittently performed by the above-described configuration, even if a finger or the like touches the rotary operation body 19, a reliable return operation of the slider 6 and the chuck body 8 can be obtained.
In this example, when the above-described feeding operation is performed, the inner surface 22 a of the circumferential recess 22 of the rotary operation body 19 is pressed against the inner surface 18 a of the circumferential protrusion 18 by the biasing force of the elastic member 10. However, the outer surface 22 b of the circumferential recess 22 may be pressed against the outer surface 18 b of the circumferential protrusion 18.

第２例を図１３〜図１５に示し説明する。前記第１例の回転操作体１９の軸筒１からの脱落防止の変形例である。本例においては、回転操作体１９の上面部に軸筒１に取り付けた押さえ部材２６を当接させているが、若干の隙間を設けてもよい。多少のがたつきが発生してしまうが、摩擦抵抗が軽減され軽い操作で容易に回転操作体１９を回転させることができるようになる。
前記押さえ部材２６について詳述する。押さえ部材２６は、軸筒１に嵌合・固定するリング部２７と回転操作体１９に当接する腕部２８とから構成されているが、腕部２８のみで構成し、その腕部２８の前方部を軸筒１に接着などの手段によって固定してもよい。また、リング部２７と軸筒との固定部を各々小判形状にするなどして、押さえ部材２６の軸筒１に対する回転防止効果を高めてもよい。尚、本例においては、前記第１例に形成した突起２１並びに、円周凹部２２を形成していないが、これらも形成し脱落防止、並びに、軸筒１に対する回転操作体１９の振れ防止の効果を向上させてもよい。 A second example will be described with reference to FIGS. This is a modified example for preventing the rotary operation body 19 of the first example from falling off the shaft cylinder 1. In this example, the pressing member 26 attached to the shaft cylinder 1 is brought into contact with the upper surface portion of the rotary operation body 19, but a slight gap may be provided. Although some rattling occurs, the frictional resistance is reduced and the rotary operation body 19 can be easily rotated by a light operation.
The pressing member 26 will be described in detail. The pressing member 26 includes a ring portion 27 that is fitted and fixed to the shaft tube 1 and an arm portion 28 that abuts against the rotary operation body 19. The pressing member 26 includes only the arm portion 28, and the front of the arm portion 28. The portion may be fixed to the shaft tube 1 by means such as adhesion. Moreover, you may heighten the rotation prevention effect with respect to the axial cylinder 1 of the pressing member 26 by making the fixing | fixed part of the ring part 27 and an axial cylinder each oval shape. In this example, the projections 21 and the circumferential recesses 22 formed in the first example are not formed, but these are also formed to prevent falling off and to prevent the rotating operation body 19 from swinging with respect to the shaft tube 1. The effect may be improved.

第３例を図１６〜図１９に示し説明する。前記第２例の押さえ部材と回転操作体の変形例である。本例における押さえ部材２９は、回転操作体３０を跨ぐようにして軸筒１に固定されているが、第２例のように片側のみを軸筒１に固定してもよい。その押さえ部材２９の内側のほぼ中央部には、円形状の溝３１が形成されており、その溝３１に回転操作体３０の回転軸３２が回転自在に軸支している。符号３３は、押さえ部材２９を軸筒１に固定するための嵌合突起である。また、本例においては、回転操作体３０の底面を軸筒１の凹部平面部３４に接触させている。すなわち、回転操作体３０は押さえ部材２９によって押さえられながら凹部平面部３４を摺るようにして回転するものとなっている。   A third example will be described with reference to FIGS. It is a modification of the pressing member and rotary operation body of the second example. The pressing member 29 in this example is fixed to the shaft tube 1 so as to straddle the rotary operation body 30, but only one side may be fixed to the shaft tube 1 as in the second example. A circular groove 31 is formed in a substantially central portion inside the pressing member 29, and a rotary shaft 32 of the rotary operation body 30 is rotatably supported in the groove 31. Reference numeral 33 denotes a fitting protrusion for fixing the pressing member 29 to the shaft tube 1. Further, in this example, the bottom surface of the rotary operation body 30 is brought into contact with the concave flat portion 34 of the shaft tube 1. That is, the rotary operation body 30 rotates while sliding on the concave flat portion 34 while being pressed by the pressing member 29.

第４例を図２０〜図２２に示し説明する。前記スライド部材の突起の種々の変形例である。図２０〜図２１に示す例は、平坦状の係合受部３５のほぼ中央部分に切り欠き部３６を設けた例である。芯の繰り出しを行う際、回転操作体１９の係合部（例えば、内面突起２３）が前記切り欠き部３６に一時的に落ち込み係合する為、操作の感覚が得られると共に、スライド部材６（チャック体８）を前進させた位置、すなわち、チャック体８が拡開した状態で一時的に係止させておくことができるため、容易に芯を収納することができる。
また、図２２に示す例は、前例の切り欠き部３６の両側に直線状の傾斜面３７を形成した例であるが、直線状の傾斜面３７に変え円弧（曲）状の傾斜面としてもよい。芯の繰り出し量を多くすることができる例である。また、スライド部材の移動量を多くすることができるため、例えばチャック体の動きにより芯戻り止め部材を内設した芯保護管を先部材内で前後動させる、所謂、スライド式芯保護管を有するシャープペンシルに適用させた場合にも十分な移動量を得ることができる。 A fourth example will be described with reference to FIGS. It is various modifications of the projection of the slide member. The example shown in FIGS. 20-21 is an example which provided the notch part 36 in the approximate center part of the flat engagement receiving part 35. FIG. When the lead is extended, the engaging portion (for example, the inner surface protrusion 23) of the rotary operation body 19 temporarily falls and engages with the cutout portion 36, so that a sense of operation is obtained and the slide member 6 ( Since the chuck body 8) can be temporarily locked in a position where the chuck body 8 is advanced, that is, in a state where the chuck body 8 is expanded, the core can be easily stored.
The example shown in FIG. 22 is an example in which linear inclined surfaces 37 are formed on both sides of the notch 36 of the previous example, but instead of the linear inclined surface 37, an arc (curved) inclined surface may be used. Good. This is an example in which the lead feeding amount can be increased. In addition, since the amount of movement of the slide member can be increased, for example, a so-called slide type core protection tube is provided in which the core protection tube provided with the core detent member is moved back and forth within the tip member by the movement of the chuck body. Even when applied to a mechanical pencil, a sufficient amount of movement can be obtained.

第５例を図２３〜図３０に示し説明する。前記回転操作体の内面突起の種々の変形例である。図２３、図２４に示す例は、回転操作体１９の内面突起３８に切り欠き部３８ａを形成した例である。前例と同様に、スライド部材６（チャック体８）を前進させた位置、すなわち、チャック体８が拡開した状態で一時的に係止させておくことができるため、容易に芯を収納することができるが、この切り欠き部は必ずしも必要なものではない。尚、本例においては、４個の内面突起３８を等間隔な位置に設けているが、図２５に示すように不等間隔な位置に設けても良い。不等間隔な位置に設けることによって、短い間隔で複数回の繰り出し操作が得られ、その後、間隔をおいて再び繰り出し操作が得られるため、芯の繰り出し動作状況がより判り易くなるようになると共に、誤って回転操作体を必要以上に回転させてしまっても、本例においては２回の繰り出し操作がなされるものの、その後は間隔が開いているため必要以上の繰り出し操作を防止することができる。すなわち、次の繰り出し動作までに時間がかかるため、誤った回転操作を認識することができるのである。
また、図２６、図２７に示す例は、前記第１例の内面突起（係合受部）２３を一体化させた例である。三ツ星型の内面突起３９をなしているが、四ツ星型、或いは、直線状の係合受部４０（図２８参照）としてもよく、形状を変更させることによって間欠動作による芯の繰り出し動作を適宜変更することができる。内面突起を一体化させることによって、その内面突起自体の強度を向上させることができる。
また、図２９、図３０に示す例は、回転操作体１９の内面突起２３の外周に筒体２４を回転自在にはめ合わせた例である。前記第１例の変形例と同様に、スライド部材６の突起１６との係合による摩擦抵抗を低減させている。 A fifth example will be described with reference to FIGS. It is various modifications of the internal surface protrusion of the said rotation operation body. The example shown in FIGS. 23 and 24 is an example in which a notch 38 a is formed in the inner protrusion 38 of the rotary operation body 19. As with the previous example, the slide member 6 (chuck body 8) can be temporarily locked in a position where the slide member 6 (chuck body 8) is advanced, that is, the chuck body 8 is expanded, so that the core can be easily stored. However, this notch is not always necessary. In this example, the four inner surface projections 38 are provided at equal intervals, but may be provided at unequal intervals as shown in FIG. By providing them at unequal intervals, it is possible to obtain a plurality of feeding operations at short intervals, and then obtain a feeding operation again at intervals, thereby making it easier to understand the lead feeding operation status. Even if the rotating operation body is accidentally rotated more than necessary, in this example, although the feeding operation is performed twice, after that, since the interval is open, it is possible to prevent the feeding operation more than necessary. . That is, since it takes time until the next feeding operation, an erroneous rotation operation can be recognized.
The example shown in FIGS. 26 and 27 is an example in which the inner surface protrusion (engagement receiving portion) 23 of the first example is integrated. Although a three-star inner protrusion 39 is formed, a four-star or linear engagement receiving portion 40 (see FIG. 28) may be used, and the lead feeding operation by intermittent operation can be performed by changing the shape. It can be changed as appropriate. By integrating the inner surface protrusions, the strength of the inner surface protrusions themselves can be improved.
Further, the examples shown in FIGS. 29 and 30 are examples in which the cylindrical body 24 is rotatably fitted to the outer periphery of the inner surface protrusion 23 of the rotary operation body 19. Similar to the modified example of the first example, the frictional resistance due to the engagement of the slide member 6 with the protrusion 16 is reduced.

以上の例においては、回転操作体１９の係合部を内面突起として説明したが、第６例（図３１〜図３２）に示すように回転操作体１９の内面に係合部となるカム形状をカム溝４１として形成してもよい。以下、具体的に説明する。３個の円弧溝からなるカム溝４１の各連結部には、前記第４例と同様に切り欠き部４１ａが形成されている。この切り欠き部４１ａもチャック体８を前進させた位置で係止させる手段であって、芯の収納を容易に行うことができる。
また、図３３に示す例は、回転操作体１９の偏心した位置に円形の溝４２を形成した例である。本例においても、円形の溝４２の内面には前例と同様な効果をなす切り欠き部４３が形成されている。尚、これらの第６例においては、カム溝を回転操作体に設けた例を示したが、スライド部材にカム溝を設けてもよい。
以上説明したように、各実施例においては、芯の繰り出し操作を行う回転操作体を軸筒の側面部に配置しているため、スライド部材の芯挿通孔の内径を大きく採ることができ、これによって、大量の芯を収容することができている。
また、筆記体ユニットの１例として芯の繰り出し機構を挙げて説明したが、これに限定されることなく、例えば、筆記体ユニットをボールペンやスタイラスペンなどとしてもよいが、突出状態を維持するためにも第５例に示したように一時的に係止が可能な切り欠き部を係合受部、或いは係合部に形成するのが好ましい。 In the above example, the engaging portion of the rotary operation body 19 has been described as the inner surface protrusion. However, as shown in the sixth example (FIGS. 31 to 32), the cam shape that becomes the engaging portion on the inner surface of the rotary operation body 19. May be formed as the cam groove 41. This will be specifically described below. A notch portion 41a is formed in each connecting portion of the cam groove 41 formed of three arc grooves as in the fourth example. The notch 41a is also a means for locking the chuck body 8 at the advanced position, and can easily store the lead.
Further, the example shown in FIG. 33 is an example in which a circular groove 42 is formed at an eccentric position of the rotary operation body 19. Also in this example, the inner surface of the circular groove 42 is formed with a notch 43 that has the same effect as the previous example. In these sixth examples, the cam groove is provided in the rotary operation body. However, the cam groove may be provided in the slide member.
As described above, in each embodiment, since the rotary operation body for performing the core feeding operation is arranged on the side surface portion of the shaft tube, the inner diameter of the core insertion hole of the slide member can be increased. Can accommodate a large number of cores.
In addition, although the lead feeding mechanism has been described as an example of the cursive unit, the present invention is not limited thereto, and for example, the cursive unit may be a ballpoint pen, a stylus pen, or the like, but to maintain a protruding state. In addition, as shown in the fifth example, it is preferable to form a notch portion that can be temporarily locked in the engagement receiving portion or the engagement portion.

本発明の第１例を示す正面図。The front view which shows the 1st example of this invention. 図１の正面図。The front view of FIG. 図２の縦断面図。The longitudinal cross-sectional view of FIG. 図３の要部拡大図。The principal part enlarged view of FIG. 図３の−線断面図。FIG. 4 is a cross-sectional view taken along the line − in FIG. 3. 図３の−線断面図。FIG. 4 is a cross-sectional view taken along the line − in FIG. 3. 回転操作体を除いた図１の斜視図。The perspective view of FIG. 1 except a rotary operation body. 回転操作体を示す斜視図。The perspective view which shows a rotation operation body. スライド部材を示す斜視図。The perspective view which shows a slide member. 変形例を示す断面斜視図。The cross-sectional perspective view which shows a modification. 図１の縦断面図。The longitudinal cross-sectional view of FIG. 動作を示す縦断面図。The longitudinal cross-sectional view which shows operation | movement. 第２例を示す要部縦断面図。The principal part longitudinal cross-sectional view which shows a 2nd example. 図１３の−線断面図。FIG. 14 is a cross-sectional view taken along the line − in FIG. 13. 押さえ部材を示す斜視図。The perspective view which shows a pressing member. 第３例を示す要部縦断面図。The principal part longitudinal cross-sectional view which shows a 3rd example. 図１６の−線断面図。FIG. 17 is a cross-sectional view taken along the line − in FIG. 16. 第３例の回転操作体を除いた斜視図。The perspective view except the rotation operation body of the 3rd example. （ａ）第３例の回転体を示す側面図。 （ｂ）第３例の押さえ部材を示す斜視図。(A) The side view which shows the rotary body of a 3rd example. (B) The perspective view which shows the pressing member of the 3rd example. 第４例を示す斜視図。The perspective view which shows the 4th example. 図２０の９０度方向反転図。The 90 degree direction inversion figure of FIG. 第４例の変形例を示す斜視図。The perspective view which shows the modification of a 4th example. 第５例を示す縦断面図。The longitudinal cross-sectional view which shows a 5th example. 図２３の左側面図。The left view of FIG. 第５例、第１例などの変形例を示す縦断面図。The longitudinal cross-sectional view which shows modifications, such as a 5th example and a 1st example. 第５例の変形例を示す縦断面図。The longitudinal cross-sectional view which shows the modification of a 5th example. 図２５の左側面図。The left view of FIG. 第５例の変形例を示す図２６相当の縦断面図。FIG. 27 is a longitudinal sectional view corresponding to FIG. 26 showing a modification of the fifth example. 第５例の変形例を示す縦断面図。The longitudinal cross-sectional view which shows the modification of a 5th example. 図２８の左側面図。The left view of FIG. 第６例を示す縦断面図。The longitudinal cross-sectional view which shows a 6th example. 図３０の左側面図。The left view of FIG. 第６例の変形例を示す図３１相当の側面図。The side view equivalent to FIG. 31 which shows the modification of a 6th example.

１ 軸筒
２ 芯タンク部
３ 消しゴム
４ キャップ部材
５ クリップ部
６ スライド部材
７ 芯通過孔
８ チャック体
９ チャックリング
１０ 弾発部材
１１ 芯戻り止め部材
１２ 先部材
１３ 芯保護管
１４ グリップ部材
１５ 平坦部
１６ 突起
１７ 開口部
１８ 円周突部
１９ 回転操作体
２０ 円周溝
２１ 突起
２２ 円周凹部
２３ 内面突起
２４ 筒体
２５ 凹凸部
２６ 押さえ部材
２７ リング部
２８ 腕部
２９ 押さえ部材
３０ 回転操作体
３１ 溝
３２ 回転軸
３３ 嵌合突起
３４ 凹部平面部
３５ 係合受部
３６ 切り欠き部
３７ 傾斜面
３８ 内面突起
３９ 内面突起
４０ 筒体
４１ カム溝
４２ 溝
４３ 切り欠き部 DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Core tank part 3 Eraser 4 Cap member 5 Clip part 6 Slide member 7 Core passage hole 8 Chuck body 9 Chuck ring 10 Repulsion member 11 Core detent member 12 Tip member 13 Core protection tube 14 Grip member 15 Flat part DESCRIPTION OF SYMBOLS 16 Protrusion 17 Opening part 18 Circumferential protrusion 19 Rotating operation body 20 Circumferential groove 21 Protrusion 22 Circumferential recessed part 23 Inner surface protrusion 24 Cylinder body 25 Uneven part 26 Holding member 27 Ring part 28 Arm part 29 Holding member 30 Rotating operation body 31 Groove 32 Rotating shaft 33 Fitting projection 34 Recess flat portion 35 Engagement receiving portion 36 Notch portion 37 Inclined surface 38 Inner surface projection 39 Inner surface projection 40 Cylindrical body 41 Cam groove 42 Groove 43 Notch portion

Claims (3)

芯の把持・開放を行うチャック体と、そのチャック体を前端に固定したスライド部材を有する芯の繰り出し機構を軸筒に対して前後動可能に配置した筆記具であって、前記スライド部材に係合受部を設け、その係合受部に係合・非係合する係合部を操作体に設けると共に、前記スライド部材を弾発部材によって後方に付勢し、また、前記軸筒の前部側面に開口部を形成し、その開口部の縁部であって、前記軸筒の外面に円周突部を形成して、その円周突部に前記操作体を嵌め込ませ、前記操作体を前記軸筒に対して回転自在に配置し、その操作体の回転により前記係合受部と前記係合部との係合・非係合をなし、前記係合受部と前記係合部との係合により前記スライド部材が弾発部材の弾発力に抗して前進し、また、前記係合受部と前記係合部との非係合により前記スライド部材が弾発部材の弾発力によって後退することを特徴とする筆記具。 A writing instrument having a chuck body for gripping and releasing a core, and a lead feeding mechanism having a slide member with the chuck body fixed to the front end thereof, which can be moved back and forth with respect to the shaft cylinder, and is engaged with the slide member A receiving portion is provided, and an engaging portion that engages / disengages with the engaging receiving portion is provided on the operating body, and the slide member is urged rearward by a resilient member, and the front portion of the shaft tube An opening is formed on a side surface, a circumferential protrusion is formed on an outer surface of the shaft cylinder at an edge of the opening, and the operation body is fitted into the circumferential protrusion, and the operation body is Arranged so as to be rotatable with respect to the shaft cylinder, the engagement receiving portion and the engagement portion are engaged / disengaged by rotation of the operating body, and the engagement receiving portion and the engagement portion The slide member moves forward against the elastic force of the elastic member by the engagement of the engagement member, and the engagement receiving portion and the engagement Writing instrument characterized by retracting the slide member by the elastic force of the elastic member by the non-engagement with. 前記係合部を複数設けると共に、それらの係合部を前記操作体の回転中心から放射状に等間隔な位置であって、各係合部間が等間隔となる位置に配置したことを特徴とする請求項１記載の筆記具。 A plurality of the engaging portions are provided, and the engaging portions are arranged at radially equidistant positions from the rotation center of the operating body, and the engaging portions are arranged at equidistant positions. The writing instrument according to claim 1. 前記係合部に切り欠き部を形成し、その切り欠き部に前記係合受部を一時的に係止可能としたことを特徴とする請求項１、或いは、請求項２に記載の筆記具。 The writing instrument according to claim 1, wherein a notch portion is formed in the engagement portion, and the engagement receiving portion can be temporarily locked in the notch portion .

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