JP5234917B2 - Writing instrument - Google Patents

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JP5234917B2
JP5234917B2 JP2008041813A JP2008041813A JP5234917B2 JP 5234917 B2 JP5234917 B2 JP 5234917B2 JP 2008041813 A JP2008041813 A JP 2008041813A JP 2008041813 A JP2008041813 A JP 2008041813A JP 5234917 B2 JP5234917 B2 JP 5234917B2
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cam
drive cam
recess
writing instrument
tip
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JP2009196260A (en
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吉敏 相沢
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Zebra Co Ltd
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Description

本発明は、駆動カムの回転によりリフィールの先端を出没させる筆記具に関するものである。   The present invention relates to a writing instrument that causes a tip of a refill to appear and disappear by rotation of a drive cam.

従来、このような分野の技術として、実公平6−15748号公報がある。この公報に記載された筆記具は、回転式多芯筆記具であり、前軸に対してキャップ(回転部)を回転させることによって、前軸の先端からリフィールを選択的に出没させている。キャップ内には円筒カム(駆動カム)が装填され、円筒カムに形成された回転止リブが、キャップの内壁面に形成された溝内に入り込んでいるので、円筒カムとキャップとを一緒に回転させることができる。そして、円筒カムの山形の傾斜カム面の先端に形成された切欠部(窪み部)内に摺動コマの尖端が入り込むことにより、前軸の先端からリフィールを突出させた状態を維持させることができる。この状態からキャップと一緒に円筒カムを回転させることで、円筒カムの切欠部から摺動コマの尖端が外れ、前軸内にリフィールの先端を引き戻すことができる。   Conventionally, Japanese Utility Model Publication No. 6-15748 is known as a technology in such a field. The writing instrument described in this publication is a rotary multi-core writing instrument, and a refill is selectively made to appear and disappear from the front end of the front shaft by rotating a cap (rotating portion) with respect to the front shaft. A cylindrical cam (drive cam) is loaded in the cap, and the rotation prevention rib formed on the cylindrical cam enters the groove formed on the inner wall surface of the cap, so the cylindrical cam and the cap rotate together. Can be made. Then, the tip of the sliding piece enters the notch (recessed portion) formed at the tip of the angled cam surface of the cylindrical cam, so that the state where the refill protrudes from the tip of the front shaft can be maintained. it can. By rotating the cylindrical cam together with the cap from this state, the tip of the sliding piece is removed from the cutout portion of the cylindrical cam, and the tip of the refill can be pulled back into the front shaft.

実公平6−15748号公報Japanese Utility Model No. 6-15748

従来の筆記具にあっては、キャップ(回転部)に対する回り止めを可能にしている回転止めリブは、円筒カムの中央付近に形成されているので、キャップと円筒カムとの連結を図っている回転止めリブと、リフィールの突出時において摺動コマと円筒カムとの連結を図っている切欠部との距離が大きく離れている。したがって、キャップの回転力を円筒カムに効率よく伝達することができない。このように、力の伝達が確実に行われないと、例えば、筒カム(駆動カム)の傾斜カム面に沿って摺動コマが移動する際に、摺動コマが円筒カムの先端に近づくにつれて、スプリングの弾性力により円筒カムに必要な回転力が増大し、利用者がキャップの回転操作を重く感じてしまう。このような現象を低減させるために、キャップ(回転部)や円筒カムを大型化して回転トルクを大きくする方策もあるが、現実的には、筆記具という特性上、寸法的な制約によってキャップや円筒カムを無闇に大型化することは非常に難しい。   In the conventional writing instrument, the rotation prevention rib that enables rotation prevention with respect to the cap (rotating part) is formed near the center of the cylindrical cam, so that the rotation is intended to connect the cap and the cylindrical cam. The distance between the retaining rib and the notch that connects the sliding piece and the cylindrical cam when the refill protrudes is greatly separated. Therefore, the rotational force of the cap cannot be efficiently transmitted to the cylindrical cam. Thus, if force is not transmitted reliably, for example, when the sliding piece moves along the inclined cam surface of the cylindrical cam (driving cam), the sliding piece approaches the tip of the cylindrical cam. The rotational force required for the cylindrical cam increases due to the elastic force of the spring, and the user feels that the rotating operation of the cap is heavy. In order to reduce this phenomenon, there is a measure to increase the rotational torque by increasing the size of the cap (rotating part) and cylindrical cam, but in reality, due to the characteristics of writing instruments, the cap and cylindrical It is very difficult to increase the size of the cam.

本発明は、回転部の回転力を駆動カムに効率よく伝達させるようにした筆記具を提供することを目的とする。   An object of the present invention is to provide a writing instrument that efficiently transmits the rotational force of a rotating portion to a drive cam.

本発明に係る筆記具は、回転部と一緒に回転する駆動カムと、リフィールに連結されたスライド駒との協働により、リフィールの先端を出没させる筆記具において、
駆動カムのカム本体部の先端側には、スライド駒に設けられた従動部の尖端が入り込んで従動部を係止させる窪み部が形成され、カム本体部の表面側には、回転部に設けられた凹部内に挿入される係止凸部が形成され、係止凸部は、窪み部まで延在していることを特徴とする。
The writing instrument according to the present invention is a writing instrument that causes the tip of the refill to appear and disappear by the cooperation of the drive cam that rotates together with the rotating portion and the slide piece connected to the refill
On the front end side of the cam main body of the drive cam, a dent is formed to receive the tip of the driven portion provided on the slide piece to lock the driven portion. A locking convex portion to be inserted into the recessed portion is formed, and the locking convex portion extends to the recess .

本発明に係る筆記具において、回転部の凹部内に駆動カムの係止凸部が挿入されることにより、回転部の回転と一緒に駆動カムを回転させることができる。さらに、カム本体部に係止凸部が形成されているので、回転部の回転力を駆動カムに効率よく伝達させることができる。このようして、力の伝達が確実に行われると、例えば、駆動カムの傾斜カム面に沿ってスライド駒が移動する際に、スライド駒が駆動カムの先端に近づくにつれて、スプリングの弾性力により円筒カムに必要な回転力が増大しても、回転部の軽快な操作感が得られ、さらには、回転部や円筒カムの小型化も可能になる。   In the writing instrument according to the present invention, the driving cam can be rotated together with the rotation of the rotating part by inserting the engaging convex part of the driving cam into the concave part of the rotating part. Furthermore, since the locking projection is formed on the cam body, the rotational force of the rotating part can be efficiently transmitted to the drive cam. In this way, when force is reliably transmitted, for example, when the slide piece moves along the inclined cam surface of the drive cam, the elastic force of the spring increases as the slide piece approaches the tip of the drive cam. Even if the rotational force required for the cylindrical cam increases, a light operation feeling of the rotating portion can be obtained, and further, the rotating portion and the cylindrical cam can be downsized.

更に、係止凸部は、窪み部まで延在している。
このような構成によって、窪み部の場所でも回転力を駆動カムに伝達させているので、駆動カムの窪み部からスライド駒の尖端を脱出させる際に最も大きな力を必要とする駆動カムの先端に、回転部の回転力を確実に伝達することできる。従って、駆動カムの窪み部内にスライド駒の従動部の尖端が入る時と、駆動カムの窪み部からスライド駒の従動部の尖端を脱出させる時との力の差を可能な限り小さくするこができ、軽快な操作感が得られるといった優れた効果を有する。
Furthermore, locking portions, that extend to the recessed portion.
With such a configuration, since the rotational force is transmitted to the drive cam even at the location of the recess, the tip of the drive cam that requires the greatest force when the tip of the slide piece is escaped from the recess of the drive cam, The rotational force of the rotating part can be reliably transmitted. Therefore, the difference in force between when the tip of the follower of the slide piece enters the recess of the drive cam and when the tip of the follower of the slide piece escapes from the recess of the drive cam can be reduced as much as possible. It has an excellent effect that a light operation feeling can be obtained.

また、窪み部は、窪み部の両側面と係止凸部の裏面とで断面コ字状に形成されていると好適である。
駆動カムの肉厚を厚くすると、窪み部の大型化や窪み部の断面コ字状化を可能にするが、駆動カムの軽量化や小型化が図れない。これに対して、本発明では、駆動カムの肉厚を薄くしつつ窪み部を大きくすることができ、係止凸部によって駆動カムの先端の強度アップが図られ、窪み部の変形や破損の防止も可能になっている。さらには、駆動カムの軽量化や小型化に有利である。
In addition, it is preferable that the recess is formed in a U-shaped cross section between both side surfaces of the recess and the back surface of the locking projection.
If the thickness of the drive cam is increased, the hollow portion can be enlarged and the hollow portion can have a U-shaped cross section, but the drive cam cannot be reduced in weight or size. On the other hand, in the present invention, the recess can be enlarged while reducing the thickness of the drive cam, the strength of the tip of the drive cam is increased by the locking projection, and the recess is deformed or damaged. Prevention is also possible. Furthermore, it is advantageous for reducing the weight and size of the drive cam.

また、回転部の凹部は、回転部の軸線方向に延在し、係止凸部は、軸線方向に延在して、凹部内で軸線方向に移動すると好適である。
係止凸部を軸線方向に延在させることで、係止凸部を大型化させることができ、回転部の回転力を更に効率良く駆動カムに伝達させることができ、駆動カムの強度アップも図られている。さらに、係止凸部が回転部の凹部内で移動可能であるため、駆動カムを軸線方向に移動させることができ、シャープペンシル型リフィールの適用が可能になる。
In addition, it is preferable that the concave portion of the rotating portion extends in the axial direction of the rotating portion, and the locking convex portion extends in the axial direction and moves in the axial direction within the concave portion.
By extending the locking projection in the axial direction, the locking projection can be enlarged, the rotational force of the rotating portion can be transmitted to the drive cam more efficiently, and the strength of the drive cam can be increased. It is illustrated. Furthermore, since the locking convex portion can move within the concave portion of the rotating portion, the drive cam can be moved in the axial direction, and a mechanical pencil type refill can be applied.

本発明によれば、回転部の回転力を駆動カムに効率よく伝達させることができる。   According to the present invention, the rotational force of the rotating portion can be efficiently transmitted to the drive cam.

以下、図面を参照しつつ本発明に係る筆記具の好適な実施形態について詳細に説明する。なお、ペン先側を「前方側」として以下説明する。   Hereinafter, preferred embodiments of a writing instrument according to the present invention will be described in detail with reference to the drawings. In the following description, the pen tip side is referred to as “front side”.

図1に示すように、回転式多芯筆記具1は、前軸2aと後軸(回転部)2bとからなる軸筒2を有し、前軸2aには、表面をメッキ処理した略円錐状の先口部材19が装着され、後軸2bにはクリップ2cが一体に形成され、前軸2aと後軸2bとは相対的に回転する。さらに、軸筒2の前軸2aの外周には、弾性体からなる筒状のグリップ部3が装着されている。このグリップ部3は、弾性変形し易い軟質材(例えば熱可塑性エラストマー(TPE))からなり、二色成形によって、前軸2aとグリップ部3は一体的に形成されている。   As shown in FIG. 1, the rotary multi-core writing instrument 1 has a shaft cylinder 2 composed of a front shaft 2a and a rear shaft (rotating portion) 2b. The front shaft 2a has a substantially conical shape whose surface is plated. Is attached to the rear shaft 2b, and the front shaft 2a and the rear shaft 2b rotate relative to each other. Further, a cylindrical grip portion 3 made of an elastic body is mounted on the outer periphery of the front shaft 2 a of the shaft tube 2. The grip portion 3 is made of a soft material that is easily elastically deformed (for example, thermoplastic elastomer (TPE)), and the front shaft 2a and the grip portion 3 are integrally formed by two-color molding.

軸筒2内には、2本のボールペン型リフィール(例えば、赤、黒のインクが入ったリフィール)4aとシャープペンシル型リフィール4bとが収容されている。各リフィール4a,4bは、軸筒2内に収容された中駒6によって支持され、この中駒6は、前軸2aに対して回転しないように連結されると共に、後軸2bに対して回転するように連結されている。   The shaft cylinder 2 accommodates two ballpoint pen type refills (for example, a refill containing red and black ink) 4a and a mechanical pencil type refill 4b. Each of the refills 4a and 4b is supported by a middle piece 6 accommodated in the shaft cylinder 2, and the middle piece 6 is connected so as not to rotate with respect to the front shaft 2a and rotates with respect to the rear shaft 2b. To be connected.

さらに、中駒6には、後述するリフィール装着部14が差し込まれる3個の挿入孔6aと、各挿入孔6aから後方に向かって軸線L方向に延在するガイド溝6bとが形成されている。各ガイド溝6b内では、リフィール装着部14の後端に固定されたスライド駒7が摺動する。そして、各ガイド溝6b内には、リフィール装着部14に巻回された圧縮バネ8が装填され、圧縮バネ8の一端は中駒6によって支持され、圧縮バネ8の他端はスライド駒7によって支持されている。   Further, the middle piece 6 is formed with three insertion holes 6a into which a later-described refill mounting portion 14 is inserted, and guide grooves 6b extending rearward from the insertion holes 6a in the axis L direction. . In each guide groove 6b, the slide piece 7 fixed to the rear end of the refill mounting portion 14 slides. Each guide groove 6 b is loaded with a compression spring 8 wound around the refill mounting portion 14. One end of the compression spring 8 is supported by the middle piece 6, and the other end of the compression spring 8 is provided by the slide piece 7. It is supported.

さらに、図2〜図5に示すように、中駒6の後端に設けられた支軸部6cによって、筒状の駆動カム9が回転自在に支持されている。支軸部6cを中心に後軸(回転部)2bと一緒に回転する駆動カム9は、内側で支軸部6cに回転自在に連結される円筒状の基部10と、この基部10の後端から突出して消しゴム13が装填されると共に、キャップ5を保持する消しゴム収容部11と、基部10の前端から軸筒2の先端側に向けて突出するカム本体部12とからなる。このカム本体部12は、基部10の端から爪状に突出すると共に、円筒を斜めに切断した形状をなし、カム本体部12の輪郭に沿って山形の傾斜カム面12aが形成されている。   Furthermore, as shown in FIGS. 2 to 5, a cylindrical drive cam 9 is rotatably supported by a support shaft portion 6 c provided at the rear end of the middle piece 6. The drive cam 9 that rotates together with the rear shaft (rotating portion) 2b around the support shaft portion 6c includes a cylindrical base portion 10 that is rotatably connected to the support shaft portion 6c inside, and a rear end of the base portion 10 The eraser 13 is loaded and the eraser 13 is loaded. The eraser accommodating portion 11 holds the cap 5, and the cam body 12 projects from the front end of the base 10 toward the distal end side of the shaft tube 2. The cam body 12 protrudes in a claw shape from the end of the base 10 and has a shape obtained by obliquely cutting a cylinder, and a mountain-shaped inclined cam surface 12 a is formed along the contour of the cam body 12.

これに対して、圧縮バネ8の付勢力によって駆動カム9の従動部材として機能する各スライド駒7は、ガイド溝6b内を摺動する摺動部15と、摺動部15から突出すると共に、リフィール4a,4bの後部が着脱自在に装着されるパイプ状のリフィール装着部14の後端内に挿入されてリフィール装着部14を保持し、リフィール装着部14を介してスライド駒7をリフィール4a,4bの後端側に連結させるための差込みピン16と、摺動部15に一体に形成されると共に、三角形状をなす従動部17とからなる。   On the other hand, each slide piece 7 that functions as a driven member of the drive cam 9 by the urging force of the compression spring 8 protrudes from the slide portion 15 that slides in the guide groove 6b, and the slide portion 15, The rear portions of the refills 4a and 4b are inserted into the rear end of the pipe-shaped refill mounting portion 14 in which the refills are detachably mounted to hold the refill mounting portion 14, and the slide piece 7 is moved to the refill 4a, via the refill mounting portion 14. The insertion pin 16 is connected to the rear end side of 4b, and the driven portion 17 is formed integrally with the sliding portion 15 and has a triangular shape.

従動部17には、カム本体部12の傾斜カム面12aに沿って摺動するV字状の従動面17aが形成され、三角形状のカム本体部12の先端には、従動部17の尖端17bが入り込んで従動部17を係止させるための窪み部30が形成されている。従って、後軸2bと一緒に駆動カム9が回転すると、カム本体部12の窪み部30内にスライド駒7の従動部17の尖端17bの何れかが選択的に入り込むので、後軸2bの回転によって、リフィール4a,4bの先端の何れかを軸筒2の先端から突出させることができる。   The driven portion 17 is formed with a V-shaped driven surface 17 a that slides along the inclined cam surface 12 a of the cam body portion 12, and a tip 17 b of the driven portion 17 is formed at the tip of the triangular cam body portion 12. A recess 30 is formed to enter and lock the driven portion 17. Accordingly, when the drive cam 9 rotates together with the rear shaft 2b, any one of the pointed ends 17b of the driven portion 17 of the slide piece 7 selectively enters the hollow portion 30 of the cam main body portion 12, so that the rotation of the rear shaft 2b. Thus, any one of the tips of the refills 4a and 4b can be projected from the tip of the shaft tube 2.

このように後軸2bを回転させると、図7に示すように、駆動カム9の傾斜カム面12aに沿って従動部17のV字状の従動面17aが摺動する。このとき、駆動カム9の窪み部30から従動部17の尖端17bを脱出させる際には、駆動カム9の回転力はかなり大きな力を必要とする。   When the rear shaft 2b is thus rotated, the V-shaped driven surface 17a of the driven portion 17 slides along the inclined cam surface 12a of the drive cam 9, as shown in FIG. At this time, when the pointed end 17b of the driven portion 17 is escaped from the recessed portion 30 of the drive cam 9, the rotational force of the drive cam 9 requires a considerably large force.

そこで、図2〜図6に示すように、駆動カム9の略三角形状のカム本体部12の表面には、カム本体部12の頂部から軸線L方向に延在する係止凸部20が形成され、この係止凸部20は、後軸(回転部)2bの内壁面に形成された凹部21内に挿入される。このように、後軸2bに設けられた凹部21内に挿入される係止凸部20は、窪み部30まで延在しているので、窪み部30の場所でも回転力を駆動カム9に伝達させることができ、駆動カム9の窪み部30からスライド駒7の尖端17bを脱出させる際に最も大きな力を必要とする駆動カム9の先端に、後軸2bの回転力を確実に伝達することできる。従って、図7に示すように、駆動カム9の窪み部30内にスライド駒7の従動部17の尖端17bが入る時と、駆動カム9の窪み部30からスライド駒7の従動部17の尖端17bを脱出させる時との力の差を可能な限り小さくすることができ、軽快な操作感が得られるといった優れた効果を有する。   Therefore, as shown in FIGS. 2 to 6, a locking convex portion 20 extending in the axis L direction from the top of the cam main body 12 is formed on the surface of the substantially triangular cam main body 12 of the drive cam 9. The locking projection 20 is inserted into a recess 21 formed on the inner wall surface of the rear shaft (rotating portion) 2b. Thus, the locking projection 20 inserted into the recess 21 provided in the rear shaft 2 b extends to the recess 30, so that the rotational force is transmitted to the drive cam 9 even at the location of the recess 30. The rotational force of the rear shaft 2b can be reliably transmitted to the tip of the drive cam 9 that requires the greatest force when the tip 17b of the slide piece 7 is allowed to escape from the recess 30 of the drive cam 9. it can. Therefore, as shown in FIG. 7, when the tip 17 b of the driven portion 17 of the slide piece 7 enters the recess 30 of the drive cam 9, and the tip of the driven portion 17 of the slide piece 7 from the recess 30 of the drive cam 9. The difference in force from the time of escaping 17b can be made as small as possible, and an excellent effect is obtained such that a light operational feeling can be obtained.

図7に示すように、駆動カム9の傾斜カム面12aに沿ってスライド駒7を窪み部30に向けて移動させるときは、圧縮バネ8の弾性力により、後軸2bの回転に必要な力は徐々に増加していくが、後軸2bは勢いに乗って回転させることができる。また、窪み部30からスライド駒7の尖端17bを脱出させる際には、いきなり大きな回転力が必要になるため、後軸2bの回転操作を重く感じてしまうことがある。そして、駆動カム9の先端付近からリフィール4a,4bの繰り出し操作を行おうとして、力を強く入れすぎると、スライド駒7の尖端17bが窪み部30を飛び越えてしまうことがある。   As shown in FIG. 7, when the slide piece 7 is moved toward the hollow portion 30 along the inclined cam surface 12 a of the drive cam 9, the force required for the rotation of the rear shaft 2 b by the elastic force of the compression spring 8. Is gradually increased, but the rear shaft 2b can be rotated with momentum. Further, when the pointed end 17b of the slide piece 7 is escaped from the hollow portion 30, suddenly large rotational force is required, and thus the rotational operation of the rear shaft 2b may be felt heavy. Then, if the force is excessively applied to perform the refilling operation of the refills 4 a and 4 b from the vicinity of the tip of the drive cam 9, the pointed end 17 b of the slide piece 7 may jump over the recess 30.

そこで、本発明の筆記具1では、カム本体部12の表面側に形成された係止凸部20によって、後軸2bの回転力を駆動カム9に効率よく伝達させることができるので、後軸2bの軽快な操作感やスライド駒7の確実な停止が可能になる。特に、係止凸部20を窪み部30まで延在させると、後軸2bの回転力を駆動カム9に最も効率よく伝達させることができる。   Therefore, in the writing instrument 1 of the present invention, the rotational force of the rear shaft 2b can be efficiently transmitted to the drive cam 9 by the locking convex portion 20 formed on the surface side of the cam main body portion 12, so that the rear shaft 2b The light operation feeling and the reliable stop of the slide piece 7 are possible. In particular, when the locking projection 20 is extended to the recess 30, the rotational force of the rear shaft 2 b can be most efficiently transmitted to the drive cam 9.

さらに、従来にあっては、駆動カムの肉厚を厚くすると、窪み部の大型化や窪み部の断面コ字状化を可能にするが、駆動カムの軽量化や小型化が図れない。そこで、図6に示すように、窪み部30は、これの両側面30aと係止凸部20の裏面20aとで断面コ字状に形成されている。よって、本実施形態では、駆動カム9の肉厚を薄くしつつ窪み部30を大きくすることができ、係止凸部20によって駆動カム9の先端の強度アップが図られ、窪み部30の変形や破損の防止も可能になっている。さらには、駆動カム9の軽量化や小型化に有利である。   Furthermore, conventionally, if the thickness of the drive cam is increased, the recess portion can be enlarged and the recess portion can be made U-shaped in cross section, but the drive cam cannot be reduced in weight or size. Therefore, as shown in FIG. 6, the recessed portion 30 is formed in a U-shaped cross section by both side surfaces 30 a of the recessed portion 30 and the back surface 20 a of the locking convex portion 20. Therefore, in the present embodiment, the recessed portion 30 can be enlarged while reducing the thickness of the drive cam 9, the strength of the tip of the drive cam 9 is increased by the locking projection 20, and the deformation of the recessed portion 30 is achieved. It is also possible to prevent damage. Furthermore, it is advantageous for reducing the weight and size of the drive cam 9.

図1及び図6に示すように、後軸2bの凹部21は、軸線L方向に延在し、係止凸部20は、軸線L方向に延在すると共に、凹部21内で軸線L方向に移動可能である。このように、係止凸部20を軸線L方向に延在させることで、係止凸部20を大型化させることができ、後軸2bの回転力を更に効率良く駆動カム9に伝達させることができ、駆動カム9の強度アップも図られている。さらに、係止凸部20が後軸2bの凹部21内で軸線L方向に移動可能であるので、シャープペンシル型リフィール4bの先端を軸筒2から突出させた状態で、芯を繰り出すためにキャップ5をノックすると、駆動カム9も一緒に軸線L方向に移動させることができる。   As shown in FIGS. 1 and 6, the concave portion 21 of the rear shaft 2 b extends in the axis L direction, and the locking convex portion 20 extends in the axis L direction, and in the concave portion 21 in the axis L direction. It is movable. Thus, by extending the locking projection 20 in the direction of the axis L, the locking projection 20 can be enlarged, and the rotational force of the rear shaft 2b can be transmitted to the drive cam 9 more efficiently. The strength of the drive cam 9 is also increased. Further, since the locking projection 20 is movable in the direction of the axis L within the recess 21 of the rear shaft 2b, a cap is provided for extending the lead with the tip of the mechanical pencil type refill 4b protruding from the shaft tube 2. When 5 is knocked, the drive cam 9 can also be moved in the direction of the axis L together.

本発明は、前述した実施形態に限定されないことは言うまでもない。例えば、本発明は、単芯であっても多芯であっても適用可能である。   It goes without saying that the present invention is not limited to the embodiment described above. For example, the present invention can be applied to a single core or a multi-core.

本発明に係る筆記具の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment of the writing instrument which concerns on this invention. 本発明に係る筆記具に適用する駆動カム及びスライド駒を示す斜視図である。It is a perspective view which shows the drive cam and slide piece which are applied to the writing instrument which concerns on this invention. 図2の側面図である。FIG. 3 is a side view of FIG. 2. 図3の断面図である。FIG. 4 is a cross-sectional view of FIG. 3. 図2の平面図である。FIG. 3 is a plan view of FIG. 2. 図5のVI−VI線に沿う断面図である。It is sectional drawing which follows the VI-VI line of FIG. 駆動カムの傾斜カム面に沿ってスライダ駒が摺動する様子を示す概略図である。It is the schematic which shows a mode that a slider piece slides along the inclination cam surface of a drive cam.

符号の説明Explanation of symbols

1…筆記具、2…軸筒、2a…前軸、2b…後軸(回転部)、4a,4b…リフィール、7…スライド駒、9…駆動カム、12…カム本体部、17…従動部、17a…従動面、17b…従動部の尖端、20…係止凸部、20a…係止凸部の裏面、21…凹部、30…窪み部、30a…窪み部の側面、L…軸線。   DESCRIPTION OF SYMBOLS 1 ... Writing instrument, 2 ... Shaft cylinder, 2a ... Front shaft, 2b ... Rear shaft (rotating part), 4a, 4b ... Refill, 7 ... Slide piece, 9 ... Drive cam, 12 ... Cam main-body part, 17 ... Drive part, 17a ... driven surface, 17b ... tip of driven portion, 20 ... locking projection, 20a ... back surface of locking projection, 21 ... recess, 30 ... recess, 30a ... side surface of recess, L ... axis.

Claims (3)

回転部と一緒に回転する駆動カムと、リフィールに連結されたスライド駒との協働により、前記リフィールの先端を出没させる筆記具において、
前記駆動カムのカム本体部の先端側には、前記スライド駒に設けられた従動部の尖端が入り込んで前記従動部を係止させる窪み部が形成され、前記カム本体部の表面側には、前記回転部に設けられた凹部内に挿入される係止凸部が形成され、前記係止凸部は、前記窪み部まで延在していることを特徴とする筆記具。
In the writing instrument that causes the tip of the refill to appear and disappear by the cooperation of the drive cam that rotates together with the rotating portion and the slide piece connected to the refill,
On the distal end side of the cam main body portion of the drive cam, a hollow portion is formed in which the tip of the driven portion provided in the slide piece enters and locks the driven portion, and on the surface side of the cam main body portion, The writing instrument according to claim 1, wherein a locking projection is formed to be inserted into a recess provided in the rotating portion, and the locking projection extends to the recess .
前記窪み部は、前記窪み部の両側面と前記係止凸部の裏面とで断面コ字状に形成されていることを特徴とする請求項記載の筆記具。 The recess portion, claim 1 writing instrument, wherein that it is U-shaped cross section between both sides of the recess and the back surface of the engaging convexed latch portion. 前記回転部の前記凹部は、前記回転部の軸線方向に延在し、前記係止凸部は、前記軸線方向に延在して、前記凹部内で軸線方向に移動することを特徴とする請求項1又は2に記載の筆記具。
The concave portion of the rotating portion extends in an axial direction of the rotating portion, and the locking convex portion extends in the axial direction and moves in the axial direction within the concave portion. Item 3. A writing instrument according to item 1 or 2 .
JP2008041813A 2008-02-22 2008-02-22 Writing instrument Active JP5234917B2 (en)

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6217264Y2 (en) * 1978-04-24 1987-05-01
JPS558116U (en) * 1978-06-29 1980-01-19
JPH0615748Y2 (en) * 1987-06-24 1994-04-27 三菱鉛筆株式会社 Compound writing instrument
JP4308628B2 (en) * 2003-11-19 2009-08-05 ミクロ株式会社 Composite writing instrument

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