JP6106003B2

JP6106003B2 - Thermochromic writing instrument

Info

Publication number: JP6106003B2
Application number: JP2013071089A
Authority: JP
Inventors: 貴宣星野
Original assignee: Pilot Corp
Current assignee: Pilot Corp
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2017-03-29
Anticipated expiration: 2033-03-29
Also published as: JP2014193573A

Description

本発明は、筒状の本体の端部に、熱変色性インキの筆跡を摩擦しその際に生じる摩擦熱で該筆跡を熱変色可能な低摩耗性の弾性材料からなる摩擦部を備え、且つ、内部に熱変色性インキを収容した熱変色性筆記具に関する。 The present invention comprises a friction part made of a low-abrasion elastic material capable of rubbing the handwriting of the thermochromic ink at the end of the cylindrical main body and heat-discoloring the handwriting with frictional heat generated at that time, and The present invention relates to a thermochromic writing instrument that contains a thermochromic ink therein.

従来、熱変色性筆記具において、軸胴の後端やキャップの頂部に摩擦体を設ける構成が開示されている。（例えば、特許文献１）。 Conventionally, in a thermochromic writing instrument, a configuration in which a friction body is provided at the rear end of the shaft barrel or the top of the cap has been disclosed. (For example, patent document 1).

特開平２００７−２２３３０２号公報Japanese Patent Laid-Open No. 2007-223302

前記特許文献１の熱変色性筆記具は、非使用時、ペンケース、ペン立て、または衣服のポケット等に収納して保管すると、摩擦部が常に外部に露出しているため、摩擦部が、他の物品（例えば、他の筆記具外面、ペンケースの内面、ペン立ての底面、または衣服のポケット内面等）に接触することにより、摩擦部表面に塵や埃が付着し、摩擦部表面が汚れることがあり、その汚れた状態の摩擦部を用いて紙面を摩擦すると、紙面が汚れてしまう不具合があった。 When the thermochromic writing instrument of Patent Document 1 is stored and stored in a pencil case, a pen stand, or a pocket of clothes when not in use, the friction part is always exposed to the outside. Contact with other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a pocket of clothes), dust and dirt adhere to the surface of the friction part, and the surface of the friction part becomes dirty. There is a problem that the paper surface is soiled when the dirty friction portion is used to rub the paper surface.

本発明は前記従来の問題点を解決するものであって、非使用時に摩擦部が汚れることを防止できる熱変色性筆記具を提供しようとするものである。 The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a thermochromic writing instrument that can prevent the friction portion from becoming dirty when not in use.

尚、本発明において、「前」とは摩擦部側を指し、「後」とはその反対側を指す。 In the present invention, “front” refers to the friction part side, and “rear” refers to the opposite side.

本願の第１の発明は、筒状の本体２の端部に、熱変色性インキの筆跡を摩擦しその際に生じる摩擦熱で該筆跡を熱変色可能な低摩耗性の弾性材料からなる摩擦部３１を備え、且つ、内部に熱変色性インキを収容した熱変色性筆記具であって、前記本体２の摩擦部３１側の端部の外面に、前記摩擦部３１の外周を包囲する保護部材４を設け、前記保護部材４が、軸方向に移動可能に設けられるとともに弾発体５により軸方向前方に常時付勢され、前記摩擦部３１の非使用時、前記保護部材４の頂部が前記摩擦部３１の頂部よりも軸方向前方に突出し、前記摩擦部３１の使用時、被筆記面６と前記保護部材４の頂部との接触により、前記保護部材４が軸方向後方に移動してなることを要件とする。 1st invention of this application is the friction which consists of a low-abrasion elastic material which can rub the handwriting of thermochromic ink to the edge part of the cylindrical main body 2, and can thermally change the handwriting by the frictional heat which arises in that case A thermochromic writing instrument comprising a portion 31 and containing a thermochromic ink therein, and a protective member that surrounds the outer periphery of the friction portion 31 on the outer surface of the end portion on the friction portion 31 side of the main body 2 4, the protective member 4 is provided so as to be movable in the axial direction, and is always urged forward by the elastic body 5 in the axial direction. When the friction portion 31 is not used, the top of the protective member 4 is The protective member 4 protrudes forward in the axial direction from the top of the friction portion 31, and when the friction portion 31 is used, the protective member 4 is moved rearward in the axial direction by contact between the writing surface 6 and the top of the protective member 4. Is a requirement.

前記第１の発明の熱変色性筆記具１は、前記本体２の摩擦部３１側の端部の外面に、前記摩擦部３１の外周を包囲する保護部材４を設け、前記保護部材４が、軸方向に移動可能に設けられるとともに弾発体５により軸方向前方に常時付勢され、前記摩擦部３１の非使用時、前記保護部材４の頂部が前記摩擦部３１の頂部よりも軸方向前方に突出し、前記摩擦部３１の使用時、被筆記面６と前記保護部材４の頂部との接触により、前記保護部材４が軸方向後方に移動してなることにより、非使用時、ペンケース、ペン立て、または衣服のポケット等に収納して保管しても、保護部材４により摩擦部３１が、他の物品（例えば、他の筆記具外面、ペンケースの内面、ペン立ての底面、または衣服のポケット内面等）に接触することが回避され、非使用時に摩擦部３１が汚れることを防止できる。尚、本発明で筒状の本体２は、例えば、一端にペン先を備え且つ内部に熱変色性インキを収容した軸筒、または該軸筒のペン先側に着脱自在に装着されるキャップ等が挙げられる。本発明で、保護部材４が摩擦部３１の外周を包囲するとは、例えば、保護部材４が、摩擦部３１の外周を完全に包囲する筒状体からなる構成、摩擦部３１の外周の一部または大部分を包囲する半筒状体からなる構成、または摩擦部３１の外周を包囲するよう間隔を置いて分散配置される複数の突出片からなる構成等が挙げられる。 The thermochromic writing instrument 1 of the first invention is provided with a protective member 4 surrounding the outer periphery of the friction portion 31 on the outer surface of the end portion of the main body 2 on the friction portion 31 side. And is always urged forward in the axial direction by the elastic body 5, and when the friction part 31 is not used, the top of the protection member 4 is axially forward of the top of the friction part 31. When the friction part 31 is used, the protection member 4 moves axially rearward due to the contact between the writing surface 6 and the top of the protection member 4, so that the pen case, pen Even if it is stored in a stand or a pocket of clothes, etc., the protective member 4 causes the friction portion 31 to move to other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the pocket of clothes. Contact with the inner surface, etc.) That friction portion 31 is stained it can be prevented at the time of use. In the present invention, the cylindrical main body 2 is, for example, a shaft cylinder having a pen tip at one end and containing thermochromic ink inside, or a cap that is detachably attached to the pen tip side of the shaft cylinder. Is mentioned. In the present invention, the protection member 4 surrounds the outer periphery of the friction part 31. For example, the protection member 4 is formed of a cylindrical body that completely surrounds the outer periphery of the friction part 31, and a part of the outer periphery of the friction part 31. Or the structure which consists of a semi-cylindrical body which encloses most, or the structure which consists of several protrusion pieces arrange | positioned at intervals so that the outer periphery of the friction part 31 may be mentioned.

本願の第２の発明は、前記第１の発明の熱変色性筆記具１において、前記保護部材４が筒状であることを要件とする。 2nd invention of this application requires that the said protection member 4 is a cylinder shape in the thermochromic writing instrument 1 of the said 1st invention.

前記第２の発明の熱変色性筆記具１は、前記保護部材４が筒状であることにより、非使用時、ペンケース、ペン立て、または衣服のポケット等に収納して保管しても、保護部材４により摩擦部３１が完全に包囲され、摩擦部３１が他の物品（例えば、他の筆記具外面、ペンケースの内面、ペン立ての底面、または衣服のポケット内面等）に接触することが確実に回避され、非使用時に摩擦部３１が汚れることを確実に防止できる。 The thermochromic writing instrument 1 according to the second aspect of the present invention is protected even when stored in a pencil case, pen stand, pocket of clothes, etc. when not in use, because the protective member 4 is cylindrical. The friction part 31 is completely surrounded by the member 4, and the friction part 31 is surely in contact with other articles (for example, the outer surface of other writing instruments, the inner surface of the pen case, the bottom surface of the pen stand, or the inner surface of the clothes pocket). Thus, it is possible to reliably prevent the friction portion 31 from becoming dirty when not in use.

本願の第３の発明は、前記第２の発明の熱変色性筆記具１において、前記本体２の摩擦部３１側の端部の外面に軸方向前方に開口する環状の出没孔２３が設けられ、前記出没孔２３より後方に該出没孔２３より大きい内径を有する環状の収容孔２４が連設され、前記出没孔２３と前記収容孔２４との間に段部２５が形成され、前記保護部材４が、筒状部４１と、該筒状部４１の後端部外面より径方向外方に突出する凸部４２とを備え、前記筒状部４１が前記出没孔２３内及び前記収容孔２４内に軸方向に摺動自在に設けられ、前記凸部４２が前記収容孔２４内に軸方向に摺動自在に収容され、前記収容孔２４内に前記弾発体５が収容され、前記摩擦部３１の非使用時、前記凸部４２が前記段部２５に係止されることを要件とする。 According to a third invention of the present application, in the thermochromic writing instrument 1 of the second invention, an annular recess 23 is provided on the outer surface of the end portion of the main body 2 on the friction portion 31 side and opens forward in the axial direction. An annular housing hole 24 having an inner diameter larger than that of the sunken hole 23 is connected to the rear of the sunken hole 23, a step 25 is formed between the sunken hole 23 and the housing hole 24, and the protective member 4. Is provided with a cylindrical portion 41 and a convex portion 42 projecting radially outward from the outer surface of the rear end portion of the cylindrical portion 41, and the cylindrical portion 41 is located in the retracting hole 23 and the receiving hole 24. The projecting portion 42 is accommodated in the accommodation hole 24 so as to be slidable in the axial direction, the elastic body 5 is accommodated in the accommodation hole 24, and the friction portion It is a requirement that the convex portion 42 is locked to the step portion 25 when 31 is not used.

前記第３の発明の熱変色性筆記具１は、前記本体２の摩擦部３１側の端部の外面に軸方向前方に開口する環状の出没孔２３が設けられ、前記出没孔２３より後方に該出没孔２３より大きい内径を有する環状の収容孔２４が連設され、前記出没孔２３と前記収容孔２４との間に段部２５が形成され、前記保護部材４が、筒状部４１と、該筒状部４１の後端部外面より径方向外方に突出する凸部４２とを備え、前記筒状部４１が前記出没孔２３内及び前記収容孔２４内に軸方向に摺動自在に設けられ、前記凸部４２が前記収容孔２４内に軸方向に摺動自在に収容され、前記収容孔２４内に前記弾発体５が収容され、前記摩擦部３１の非使用時、前記凸部４２が前記段部２５に係止されることにより、保護部材４及び弾発体５５を筒体の摩擦部３１側の端部に適正に配置することができる。 The thermochromic writing instrument 1 according to the third aspect of the present invention is provided with an annular in / out hole 23 that opens forward in the axial direction on the outer surface of the end of the main body 2 on the friction part 31 side, and the rear of the in / out hole 23 An annular accommodation hole 24 having an inner diameter larger than the in / out hole 23 is continuously provided, a step portion 25 is formed between the in / out hole 23 and the accommodation hole 24, and the protection member 4 includes a cylindrical portion 41, A convex portion 42 projecting radially outward from the outer surface of the rear end portion of the cylindrical portion 41, and the cylindrical portion 41 is slidable in the axial direction in the retracting hole 23 and the receiving hole 24. Provided, the convex portion 42 is accommodated in the accommodating hole 24 so as to be slidable in the axial direction, the elastic body 5 is accommodated in the accommodating hole 24, and when the friction portion 31 is not used, the convex portion 42 is provided. When the portion 42 is locked to the step portion 25, the protection member 4 and the elastic body 55 are connected to the cylindrical friction portion 31. It can be properly disposed end.

本願の第４の発明は、前記第１、第２または第３の発明の熱変色性筆記具１において、前記保護部材４の頂部が凸曲面状であることを要件とする。 According to a fourth aspect of the present invention, in the thermochromic writing instrument 1 according to the first, second or third aspect of the invention, the top of the protective member 4 is a convex curved surface.

前記第４の発明の熱変色性筆記具１は、前記保護部材４の頂部が凸曲面状（例えば半球面状）であることにより、摩擦部３１の使用時、被筆記面６上をあらゆる方向に円滑に摺動させることができる。 In the thermochromic writing instrument 1 according to the fourth aspect of the invention, the top of the protective member 4 has a convex curved surface (for example, a hemispherical shape). Smooth sliding is possible.

本発明において、前記摩擦部３１を構成する弾性材料は、弾性を有する合成樹脂（ゴム、エラストマー）が好ましく、例えば、シリコーン樹脂、ＳＢＳ樹脂（スチレン−ブタジエン−スチレン共重合体）、ＳＥＢＳ樹脂（スチレン−エチレン−ブチレン−スチレン共重合体）、フッ素系樹脂、クロロプレン樹脂、ニトリル樹脂、ポリエステル系樹脂、エチレンプロピレンジエンゴム（ＥＰＤＭ）等が挙げられる。前記摩擦部３１を構成する弾性を有する合成樹脂は、高摩耗性の弾性材料（例えば、消しゴム等）ではなく、摩擦時に摩耗カス（消しカス）が殆ど生じない低摩耗性の弾性材料である。本発明において、前記保護部材４は、合成樹脂（例えば、ポリカーボネイト、ポリエチレン、ポリプロピレン、ポリアセタール、ＡＢＳ樹脂等）または金属から構成されることが好ましい。また、前記本体２２は、合成樹脂（例えば、ポリカーボネイト、ポリエチレン、ポリプロピレン、ポリアセタール、ＡＢＳ樹脂等）または金属から構成されることが好ましい。 In the present invention, the elastic material constituting the friction part 31 is preferably a synthetic resin (rubber or elastomer) having elasticity. For example, silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene) -Ethylene-butylene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM) and the like. The synthetic resin having elasticity constituting the friction portion 31 is not a highly wearable elastic material (for example, an eraser) but a low wear elastic material in which wear debris (erasure debris) hardly occurs during friction. In the present invention, the protective member 4 is preferably composed of a synthetic resin (for example, polycarbonate, polyethylene, polypropylene, polyacetal, ABS resin, etc.) or a metal. The main body 22 is preferably made of a synthetic resin (for example, polycarbonate, polyethylene, polypropylene, polyacetal, ABS resin, etc.) or a metal.

本発明の熱変色性筆記具は、非使用時に摩擦部が汚れることを防止できる。 The thermochromic writing instrument of the present invention can prevent the friction part from becoming dirty when not in use.

本発明の実施の形態の摩擦部非使用時の要部縦断面図である。It is a principal part longitudinal cross-sectional view at the time of non-use of the friction part of embodiment of this invention. 本発明の実施の形態の摩擦部使用時の要部縦断面図である。It is a principal part longitudinal cross-sectional view at the time of use of the friction part of embodiment of this invention.

図１及び図２の本発明の実施の形態の熱変色性筆記具１を示す。 The thermochromic writing instrument 1 of embodiment of this invention of FIG.1 and FIG.2 is shown.

・本体
本体２は、円筒状の内部材２１と、該内部材２１の後端部外周面に固着される円筒状の外部材２２とからなる。前記本体２の内部材２１及び外部材２２は、合成樹脂または金属により形成される。前記本体２は、例えば、内部に熱変色性インキが収容され且つ該熱変色性インキが吐出可能なペン先を一端に備えた軸筒、または、前記軸筒のペン先側に着脱自在のキャップが挙げられる。前記本体２が軸筒の場合、軸筒の反ペン先側の端部に摩擦部３１が設けられる。前記本体２がキャップの場合、キャップの閉鎖側端部に摩擦部３１が設けられる。 The main body 2 includes a cylindrical inner member 21 and a cylindrical outer member 22 fixed to the outer peripheral surface of the rear end portion of the inner member 21. The inner member 21 and the outer member 22 of the main body 2 are formed of synthetic resin or metal. The main body 2 is, for example, a shaft cylinder that contains a thermochromic ink inside and a pen tip that can discharge the thermochromic ink at one end, or a cap that is detachable on the pen tip side of the shaft cylinder. Is mentioned. When the main body 2 is a shaft cylinder, a friction portion 31 is provided at an end of the shaft cylinder on the side opposite to the pen tip. When the main body 2 is a cap, a friction portion 31 is provided at the closing side end of the cap.

・内部材
前記内部材２１は、前端部に、小径部２１ａと該小径部２１ａより後方に連設される大径部２１ｂと、該大径部２１ｂと小径部２１ａとの間に形成される肩部２１ｃとを備える。前記内部材２１の小径部２１ａの前端部には、取付孔２１ｄが設けられる。前記取付孔２１ｄの内周面には、内向突起が形成される。 Inner member The inner member 21 is formed at the front end portion between the small-diameter portion 21a, the large-diameter portion 21b connected to the rear of the small-diameter portion 21a, and the large-diameter portion 21b and the small-diameter portion 21a. And a shoulder portion 21c. A mounting hole 21d is provided at the front end of the small diameter portion 21a of the inner member 21. An inward projection is formed on the inner peripheral surface of the mounting hole 21d.

・外部材
前記外部材２２は、前記内部材２１の大径部２１ｂの外周面に嵌着され且つ前記小径部２１ａの外周面を包囲する。前記外部材２２の前端部内面には、環状突起２２ａが形成される。 Outer member The outer member 22 is fitted on the outer peripheral surface of the large-diameter portion 21b of the inner member 21 and surrounds the outer peripheral surface of the small-diameter portion 21a. An annular protrusion 22 a is formed on the inner surface of the front end portion of the outer member 22.

・摩擦部材
筒状の本体２の一端に、低摩耗性の弾性材料（例えば、シリコーン樹脂、ＳＢＳ樹脂、ＳＥＢＳ樹脂）からなる摩擦部材３が固着される。前記摩擦部材３は、外部に露出する大径の前部と、本体２の取付孔２１ｄ（内部材２１の取付孔２１ｄ）に嵌着される小径の後部とからなる。摩擦部材３の後部が取付孔２１ｄに嵌入される。前記摩擦部材３の後部の外周面には、外向突起が形成され、該外向突起が、摩擦部材３の後部を取付孔２１ｄに嵌入した際、前記取付孔２１ｄ内周面の内向突起と乗り越え係合される。前記大径の前部の頂部には凸曲面状の摩擦部３１が形成される。 The friction member 3 made of a low-abrasion elastic material (for example, silicone resin, SBS resin, SEBS resin) is fixed to one end of the cylindrical body 2 of the friction member. The friction member 3 includes a large-diameter front portion exposed to the outside and a small-diameter rear portion fitted into the mounting hole 21d of the main body 2 (the mounting hole 21d of the inner member 21). The rear part of the friction member 3 is fitted into the mounting hole 21d. An outward projection is formed on the outer peripheral surface of the rear portion of the friction member 3, and when the rear projection fits the rear portion of the friction member 3 into the attachment hole 21d, the outward protrusion engages with the inward projection on the inner peripheral surface of the attachment hole 21d. Combined. A convex curved friction portion 31 is formed at the top of the large diameter front portion.

・出没孔，収容孔，段部
前記本体２の内部材２１の小径部２１ａ外周周面と外部材２２内周面との間には、環状空間が形成される。前記環状空間が、前記環状突起２２ａの内側に形成され且つ軸方向前方に開口する出没孔２３と、該出没孔２３より後方に連設される大径の収容孔２４とからなる。前記出没孔２３と前記収容孔２４との間には段部２５が形成される。 -Recessed hole, accommodating hole, stepped portion An annular space is formed between the outer peripheral surface of the small diameter portion 21a of the inner member 21 of the main body 2 and the inner peripheral surface of the outer member 22. The annular space is composed of an in / out hole 23 that is formed inside the annular protrusion 22a and opens forward in the axial direction, and a large-diameter receiving hole 24 that is connected to the back of the in / out hole 23. A step portion 25 is formed between the protrusion / recess hole 23 and the accommodation hole 24.

・保護部材
前記出没孔２３の内部及び収容孔２４の内部に、筒状の保護部材４が軸方向に摺動自在に設けられる。前記保護部材４は、筒状部４１と、該筒状部４１の後端部外面より径方向外方に突出する凸部４２とを備える。前記保護部材４の筒状部４１が、前記出没孔２３及び収容孔２４の内部に軸方向に摺動自在に設けられる。前記保護部材４の凸部４２が、前記収容孔２４の内部に軸方向に摺動自在に設けられる。前記筒状部４１の頂部が、凸曲面状（Ｒ曲面状）に形成される。また、前記保護部材４は、合成樹脂により一体に形成される。前記保護部材４を、透明性を有する合成樹脂により形成することにより、摩擦操作時、摩擦部３１を視認することできる。 -Protective member A cylindrical protective member 4 is slidably provided in the axial direction inside the protrusion hole 23 and the accommodation hole 24. The protective member 4 includes a cylindrical portion 41 and a convex portion 42 that protrudes radially outward from the outer surface of the rear end portion of the cylindrical portion 41. A cylindrical portion 41 of the protection member 4 is provided inside the protrusion / depression hole 23 and the accommodation hole 24 so as to be slidable in the axial direction. The convex portion 42 of the protection member 4 is provided in the housing hole 24 so as to be slidable in the axial direction. A top portion of the cylindrical portion 41 is formed in a convex curved surface shape (R curved surface shape). The protective member 4 is integrally formed of synthetic resin. By forming the protection member 4 from a synthetic resin having transparency, the friction part 31 can be visually recognized during the friction operation.

・弾発体
前記保護部材４は、弾発体５（例えば、圧縮コイルスプリング、ゴムやスポンジ等の弾性体）により常時、前方に弾発付勢される。前記弾発体５は、前記収容孔２４内に配置される。前記弾発体５の前端が保護部材４の後面に当接され、前記弾発体５の後端が内部材２１の肩部２１ｃに当接される。前記弾発体５の保護部材４を前方に付勢する弾発荷重は、少なくとも、熱変色性筆記具１全体の重量よりも高く設定される。 -Bullet body The protective member 4 is always bullet-biased forward by a bullet body 5 (for example, an elastic body such as a compression coil spring, rubber or sponge). The bullet body 5 is disposed in the accommodation hole 24. The front end of the bullet 5 is brought into contact with the rear surface of the protection member 4, and the rear end of the bullet 5 is brought into contact with the shoulder 21 c of the inner member 21. The elastic load for urging the protective member 4 of the elastic body 5 forward is set at least higher than the weight of the entire thermochromic writing instrument 1.

・作用
摩擦部３１の非使用時、保護部材４の筒状部４１が、摩擦部３１の出没孔２３より前方に突出され、該筒状部４１が摩擦部３１を包囲し、筒状部４１の頂部が摩擦部３１の頂部よりも前方に位置してなる。それにより、摩擦部３１が他の物品に接触することを回避される。摩擦部３１の使用時、被筆記面６と保護部材４の筒状部４１の頂部とが接触し、被筆記面６により保護部材４が後方に押圧され、保護部材４の後部が出没孔２３内に没入され、摩擦部３１を被筆記面６に押し当てて使用できる。それにより、摩擦操作前に、保護部材４を移動させる別の操作が不要となり、摩擦部３１を迅速に使用できる。 When the working friction portion 31 is not used, the cylindrical portion 41 of the protection member 4 protrudes forward from the retracting hole 23 of the friction portion 31, the cylindrical portion 41 surrounds the friction portion 31, and the cylindrical portion 41 The top part is located in front of the top part of the friction part 31. Thereby, it is avoided that the friction part 31 contacts other articles | goods. When the friction portion 31 is used, the writing surface 6 and the top portion of the cylindrical portion 41 of the protection member 4 come into contact with each other, the protection member 4 is pressed backward by the writing surface 6, and the rear portion of the protection member 4 is exposed and retracted hole 23. The friction part 31 is pressed against the writing surface 6 and can be used. Thereby, another operation of moving the protection member 4 is not required before the friction operation, and the friction portion 31 can be used quickly.

本実施の形態の熱変色性筆記具１は、前記本体２の摩擦部３１側の端部の外面に、前記摩擦部３１の外周を包囲する保護部材４を設け、前記保護部材４が、軸方向に移動可能に設けられるとともに弾発体５により軸方向前方に常時付勢され、前記摩擦部３１の非使用時、前記保護部材４の頂部が前記摩擦部３１の頂部よりも軸方向前方に突出し、前記摩擦部３１の使用時、被筆記面６と前記保護部材４の頂部との接触により、前記保護部材４が軸方向後方に移動してなることにより、非使用時、ペンケース、ペン立て、または衣服のポケット等に収納して保管しても、保護部材４により摩擦部３１が、他の物品（例えば、他の筆記具外面、ペンケースの内面、ペン立ての底面、または衣服のポケット内面等）に接触することが回避され、非使用時に摩擦部３１が汚れることを防止できる。 The thermochromic writing instrument 1 of the present embodiment is provided with a protective member 4 that surrounds the outer periphery of the friction portion 31 on the outer surface of the end portion of the main body 2 on the friction portion 31 side, and the protective member 4 is in the axial direction. And is always urged forward in the axial direction by the elastic body 5, and when the friction part 31 is not used, the top of the protection member 4 protrudes forward in the axial direction from the top of the friction part 31. When the friction part 31 is used, the protective member 4 is moved rearward in the axial direction by contact between the writing surface 6 and the top part of the protective member 4. Even if it is stored and stored in a pocket of clothes, etc., the friction member 31 may be moved to another article (for example, the outer surface of another writing instrument, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a clothes pocket by the protective member 4. Etc.) is avoided and non-use It is possible to prevent the sometimes friction portion 31 is stained.

本実施の形態の熱変色性筆記具１は、前記保護部材４が筒状であることにより、非使用時、ペンケース、ペン立て、または衣服のポケット等に収納して保管しても、保護部材４により摩擦部３１が、他の物品（例えば、他の筆記具外面、ペンケースの内面、ペン立ての底面、または衣服のポケット内面等）に接触することが確実に回避され、非使用時に摩擦部３１が汚れることを確実に防止できる。 The thermochromic writing instrument 1 according to the present embodiment is such that the protective member 4 has a cylindrical shape, so that the protective member 4 can be stored in a pencil case, a pen stand, a pocket of clothes or the like when not in use. 4 reliably prevents the frictional portion 31 from coming into contact with other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a pocket of clothes). It is possible to reliably prevent the 31 from becoming dirty.

本実施の形態の熱変色性筆記具１は、前記本体２の摩擦部３１側の端部の外面に軸方向前方に開口する環状の出没孔２３が設けられ、前記出没孔２３より後方に該出没孔２３より大きい内径を有する環状の収容孔２４が連設され、前記出没孔２３と前記収容孔２４との間に段部２５が形成され、前記保護部材４が、筒状部４１と、該筒状部４１の後端部外面より径方向外方に突出する凸部４２とを備え、前記筒状部４１が前記出没孔２３内及び前記収容孔２４内に軸方向に摺動自在に設けられ、前記凸部４２が前記収容孔２４内に軸方向に摺動自在に収容され、前記収容孔２４内に前記弾発体５が収容され、前記摩擦部３１の非使用時、前記凸部４２が前記段部２５に係止されることにより、保護部材４及び弾発体５を筒体の摩擦部３１側の端部に適正に配置することができる。 The thermochromic writing instrument 1 of the present embodiment is provided with an annular in / out hole 23 that opens forward in the axial direction on the outer surface of the end portion on the friction part 31 side of the main body 2, and the intrusion / intrusion is provided behind the in / out hole 23. An annular housing hole 24 having an inner diameter larger than the hole 23 is continuously provided, a step portion 25 is formed between the protruding and retracting hole 23 and the housing hole 24, and the protection member 4 includes a cylindrical portion 41, And a convex portion 42 projecting radially outward from the outer surface of the rear end portion of the cylindrical portion 41, and the cylindrical portion 41 is slidable in the axial direction in the retracting hole 23 and the receiving hole 24. The convex portion 42 is accommodated in the accommodating hole 24 so as to be slidable in the axial direction. The elastic body 5 is accommodated in the accommodating hole 24. When the friction portion 31 is not used, the convex portion 42 is locked to the step portion 25, so that the protection member 4 and the elastic body 5 are moved to the friction portion 31 side of the cylindrical body. It can be properly disposed part.

本実施の形態の熱変色性筆記具１は、前記保護部材４の頂部が凸曲面状（例えば半球面状）であることにより、摩擦部３１の使用時、被筆記面６上をあらゆる方向に円滑に摺動させることができる。 In the thermochromic writing instrument 1 of the present embodiment, the top of the protective member 4 has a convex curved surface (for example, a hemispherical shape), so that when the friction portion 31 is used, the surface of the writing surface 6 can be smoothly smoothed in all directions. Can be slid.

１熱変色性筆記具
２本体
２１内部材
２１ａ小径部
２１ｂ大径部
２１ｃ肩部
２１ｄ取付孔
２２外部材
２２ａ環状突起
２３出没孔
２４収容孔
２５段部
３摩擦部材
３１摩擦部
４保護部材
４１筒状部
４２凸部
５弾発体
６被筆記面 DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Main body 21 Inner member 21a Small diameter part 21b Large diameter part 21c Shoulder part 21d Mounting hole 22 External material 22a Ring protrusion 23 Recessed hole 24 Accommodating hole 25 Step part 3 Friction member 31 Friction part 4 Protection member 41 Cylindrical shape Part 42 convex part 5 projectile 6 writing surface

Claims

The end of the cylindrical body is provided with a friction part made of a low-abrasion elastic material capable of rubbing the handwriting of thermochromic ink and heat-discoloring the handwriting with the frictional heat generated at that time. A thermochromic writing instrument containing a color-changing ink, wherein a protective member surrounding the outer periphery of the friction part is provided on the outer surface of the friction part side of the main body, and the protective member is movable in the axial direction When the friction part is not used, the top of the protection member protrudes axially forward from the top of the friction part, and the friction part is used. The thermochromic writing instrument, wherein the protective member is moved rearward in the axial direction by contact between the writing surface and the top of the protective member.

The thermochromic writing instrument according to claim 1, wherein the protective member is cylindrical.

An annular recess / exit opening that opens forward in the axial direction is provided on the outer surface of the end portion on the friction part side of the main body, and an annular accommodation hole having an inner diameter larger than the recess / exit hole is provided behind the recess / exit, A step portion is formed between the protrusion / recess hole and the accommodation hole, and the protection member includes a cylindrical portion and a convex portion protruding radially outward from the outer surface of the rear end portion of the cylindrical portion, A cylindrical portion is provided slidably in the axial direction in the retracting hole and in the accommodating hole, the convex portion is accommodated in the accommodating hole so as to be slidable in the axial direction, and the elastic portion is accommodated in the accommodating hole. The thermochromic writing instrument according to claim 2, wherein a foam is accommodated and the convex portion is locked to the step portion when the friction portion is not used.

The thermochromic writing instrument according to any one of claims 1 to 3, wherein a top portion of the protective member has a convex curved surface shape.