JP6774331B2 - Thermal discoloration writing instrument - Google Patents

Thermal discoloration writing instrument Download PDF

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JP6774331B2
JP6774331B2 JP2016256741A JP2016256741A JP6774331B2 JP 6774331 B2 JP6774331 B2 JP 6774331B2 JP 2016256741 A JP2016256741 A JP 2016256741A JP 2016256741 A JP2016256741 A JP 2016256741A JP 6774331 B2 JP6774331 B2 JP 6774331B2
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knock member
rear end
barrel
end hole
pen tip
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JP2018108669A (en
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達也 飯島
達也 飯島
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Pilot Corp KK
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Description

本発明は、熱変色性筆記具に関する。 The present invention relates to a thermochromic writing instrument.

従来、例えば、特許文献１には、筆記体の内部に熱変色性インキを収容し、前記筆記体の前端に前記熱変色性インキが吐出可能なペン先を設け、前記筆記体を軸筒内に前後方向に移動可能に収容し、前記軸筒の後端部にノック体を設け、前記ノック体を前方に押圧することによりペン先を軸筒の前端孔から突出状態にし、再度、前記ノック体を前方に押圧することにより前記ペン先突出状態を解除しペン先を軸筒の前端孔より軸筒内に没入状態にする出没機構を備え、前記ノック体の後端部外面に、前記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前記熱変色性インキの筆跡を熱変色可能な摩擦体を設け、前記摩擦体に係合部を設けるとともに前記摩擦体の係合部と係合可能な被係合部を設け、前記摩擦体を用いた摩擦操作の際、前記係合部と前記被係合部とを係合させ、軸筒に対する摩擦体の前後方向の移動を阻止してなることを特徴とする熱変色性筆記具が開示されている。 Conventionally, for example, in Patent Document 1, a thermochromic ink is housed inside a cursive, a pen tip capable of ejecting the thermochromic ink is provided at the front end of the cursive, and the cursive is placed in a shaft cylinder. A knock body is provided at the rear end of the barrel, and the knock body is pressed forward to make the pen tip protrude from the front end hole of the barrel, and the knock body is knocked again. The pen tip is released from the protruding state by pressing the body forward, and the pen tip is provided with a retracting mechanism that allows the pen tip to be immersed in the shaft cylinder through the front end hole of the shaft cylinder. The heat is applied to the outer surface of the rear end portion of the knock body. A friction body capable of thermally discoloring the cursive of the heat-discoloring ink by rubbing the cursive of the discoloration ink and the frictional heat generated at that time is provided, and an engaging portion is provided on the friction body and the engaging portion of the friction body An engageable portion is provided so that the engaged portion and the engaged portion are engaged during a friction operation using the friction body to prevent the friction body from moving in the front-rear direction with respect to the barrel. A thermochromic cursive writing tool is disclosed.

さらに、特許文献１には、ペン先突出状態において、前記摩擦体の係合部と前記軸筒の係合部（Ｌ字状の溝の周方向に延びる溝）に係合させ、軸筒に対する摩擦体の前後方向の移動を阻止してなる構成が開示されている。 Further, in Patent Document 1, in a pen tip protruding state, the engaging portion of the friction body and the engaging portion of the shaft cylinder (groove extending in the circumferential direction of the L-shaped groove) are engaged with each other with respect to the shaft cylinder. A configuration is disclosed that prevents the friction body from moving in the front-rear direction.

特開２０１１−３７０８７号公報Japanese Unexamined Patent Publication No. 2011-37087

前記特許文献１の熱変色性筆記具は、ペン先突出状態で摩擦体の前後方向の移動を阻止してなり、ペン先没入状態では、摩擦体の前後方向の移動を阻止については考慮されていない。そのため、ペン先没入状態では摩擦体を用いた安定した摩擦操作が困難であるとともに、非使用時にノック体を不用意に押圧してペン先を誤って突出状態にさせるおそれがある。 The thermochromic writing instrument of Patent Document 1 prevents the friction body from moving in the front-rear direction in the pen tip protruding state, and does not consider preventing the friction body from moving in the front-rear direction in the pen tip immersion state. .. Therefore, it is difficult to perform a stable friction operation using the friction body in the pen tip immersion state, and there is a possibility that the knock body is inadvertently pressed when not in use to cause the pen tip to be in the protruding state by mistake.

本発明は、前記従来の問題点を解決するものであって、ペン先没入状態及びペン先突出状態のいずれであっても、摩擦体を用いた安定した摩擦操作が可能であり、しかも非使用時にノック部材を不用意に押圧してペン先を誤って突出状態にさせることを回避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 can perform stable friction operation using a friction body in either a pen tip immersion state or a pen tip protrusion state, and is not used. It is an object of the present invention to provide a thermochromic writing instrument that can avoid inadvertently pressing a knock member and accidentally causing the pen tip to protrude.

尚、本発明において、「前」とはペン体側を指し、「後」とはその反対側を指す。尚、本発明で、「ペン先没入状態」とは、ペン先が軸筒内に没入した状態をいい、「ペン先突出状態」とは、ペン先が軸筒の前端より外部に突出した状態をいう。 In the present invention, "front" refers to the pen body side, and "rear" refers to the opposite side. In the present invention, the "pen tip immersion state" means a state in which the pen tip is immersed in the barrel, and the "pen tip protrusion state" means a state in which the pen tip protrudes outward from the front end of the barrel. To say.

本願の第１の発明に係る熱変色性筆記具１は、筆記体３の内部に熱変色性インキを収容し、前記筆記体３の前端に前記熱変色性インキが吐出可能なペン先３１を設け、前記筆記体３を軸筒２内に前後方向に移動可能に収容し、前記軸筒２の後端孔２２より後方にノック部材６を突出させ、前記ノック部材６を前方に押圧することによりペン先３１を軸筒２の前端孔２１から突出状態にし、再度、前記ノック部材６を前方に押圧することにより前記ペン先突出状態を解除しペン先３１を軸筒２の前端孔２１より軸筒２内に没入状態にする出没機構を備え、前記ノック部材６の後端部外面に、前記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前記熱変色性インキの筆跡を熱変色可能な摩擦部８を設けた熱変色性筆記具であって、
前記出没機構が、前記軸筒２内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯２４及びカム溝２５と、前記筆記体３の後方に前記軸筒２に対して回転可能に配置され、前記カム歯２４または前記カム溝２５に交互に係合可能な複数の突条４１を有する回転部材４と、前記回転部材４の後方に、前記軸筒２に対して回転不能且つ前後方向に移動可能に配置され、前記回転部材４を回動させる複数のカム突起５１を有するとともに前記軸筒２内面のカム溝２５に前後動自在に係合される複数の係合突起５２を有するカム部材５と、前記カム部材５を前方に押圧するノック部材６と、前記筆記体３を後方に付勢する弾発体７と、を備え、
前記軸筒２の後端孔２２の開口部内面の横断面形状を非円形状とするとともに、
前記ノック部材６の側壁に、前記後端孔２２に挿入可能な規制壁部６１が形成され、前記規制壁部６１の外面の横断面形状を、前記後端孔２２の内面の形状に対応した非円形状とし、
前記ノック部材６の規制壁部６１が前記後端孔２２内にあるとき、前記ノック部材６の前方への押圧操作が可能となり、
前記ノック部材６の規制壁部６１が前記後端孔２２の開口部より後方に位置されたとき、前記ノック部材６が前記軸筒２に対して回転可能となり、
前記ノック部材６が前記軸筒２に対して回転操作され、前記ノック部材６の規制壁部６１の前端が前記軸筒２の後端孔２２の開口縁部に当接された状態のとき、前記ノック部材６の前方移動が阻止されることを要件とする。 The thermochromic writing tool 1 according to the first invention of the present application accommodates the thermochromic ink inside the cursive 3, and provides a pen tip 31 capable of ejecting the thermochromic ink at the front end of the cursive 3. The cursive 3 is housed in the barrel 2 so as to be movable in the front-rear direction, the knock member 6 is projected rearward from the rear end hole 22 of the barrel 2, and the knock member 6 is pressed forward. The pen tip 31 is brought into a protruding state from the front end hole 21 of the barrel 2, and the knock member 6 is pressed forward again to release the pen tip protruding state, and the pen tip 31 is shafted from the front end hole 21 of the barrel 2. A hoisting mechanism for immersing the ink in the cylinder 2 is provided, and the cursive of the heat-discoloring ink is rubbed against the outer surface of the rear end of the knock member 6, and the frictional heat generated at that time heats the brush of the heat-discoloring ink. A heat-discolorable writing tool provided with a discolorable friction portion 8.
A plurality of cam teeth 24 and cam grooves 25 formed on the inner surface of the shaft cylinder 2 and alternately arranged along the circumferential direction extending in the front-rear direction, and the shaft cylinder behind the writing body 3 A rotating member 4 having a plurality of ridges 41 rotatably arranged with respect to the cam tooth 24 or alternately engaging with the cam tooth 24 or the cam groove 25, and a shaft cylinder 2 behind the rotating member 4. A plurality of cam protrusions 51 that are non-rotatable and movable in the front-rear direction, have a plurality of cam protrusions 51 for rotating the rotating member 4, and are movably engaged with a cam groove 25 on the inner surface of the barrel 2. A cam member 5 having an engaging projection 52, a knock member 6 for pressing the cam member 5 forward, and a projectile 7 for urging the writing body 3 rearward.
The cross-sectional shape of the inner surface of the opening of the rear end hole 22 of the axle cylinder 2 is a non-circular shape, and the shape is non-circular.
A regulation wall portion 61 that can be inserted into the rear end hole 22 is formed on the side wall of the knock member 6, and the cross-sectional shape of the outer surface of the regulation wall portion 61 corresponds to the shape of the inner surface of the rear end hole 22. Non-circular
When the regulation wall portion 61 of the knock member 6 is inside the rear end hole 22, the knock member 6 can be pressed forward.
When the regulation wall portion 61 of the knock member 6 is positioned behind the opening of the rear end hole 22, the knock member 6 becomes rotatable with respect to the axle cylinder 2.
When the knock member 6 is rotated with respect to the axle cylinder 2 and the front end of the regulation wall portion 61 of the knock member 6 is in contact with the opening edge portion of the rear end hole 22 of the axle cylinder 2. It is a requirement that the forward movement of the knock member 6 is prevented.

本願の第１の発明に係る熱変色性筆記具１は、前記構成により、ペン先没入状態及びペン先突出状態のいずれであっても、摩擦体を用いた安定した摩擦操作が可能であり、しかも非使用時にノック部材６を不用意に押圧してペン先３１を誤って突出状態にさせることを回避できる。 The thermochromic writing instrument 1 according to the first invention of the present application can perform a stable friction operation using a friction body regardless of whether the pen tip is immersed or the pen tip is projected due to the above configuration. It is possible to avoid inadvertently pressing the knock member 6 when not in use to accidentally bring the pen tip 31 into a protruding state.

本願の第２の発明に係る熱変色性筆記具１は、前記本願の第１の発明に係る熱変色性筆記具１において、前記ノック部材６が前記軸筒２に対して前方に付勢され、前記ノック部材６の規制壁部６１が前後方向に移動可能に前記後端孔２２内に配置されることを要件とする。 In the thermochromic writing instrument 1 according to the second invention of the present application, the knock member 6 is urged forward with respect to the barrel 2 in the thermochromic writing instrument 1 according to the first invention of the present application. It is a requirement that the regulation wall portion 61 of the knock member 6 is arranged in the rear end hole 22 so as to be movable in the front-rear direction.

本願の第２の発明に係る熱変色性筆記具１は、前記構成により、通常の筆記使用時（非摩擦操作時）において、規制壁部６１が常時、後端孔２２内に配置されるため、摩擦部８を用いて摩擦操作するとき以外に、不用意に、規制壁部６１の前端が後端孔２２の開口縁部より後方に位置され、ノック部材６の規制壁部６１の前端と後端孔２２の開口縁部とが当接されることを回避できる。 In the thermochromic writing instrument 1 according to the second invention of the present application, the regulation wall portion 61 is always arranged in the rear end hole 22 during normal writing use (non-friction operation) due to the above configuration. Except when the friction portion 8 is used for friction operation, the front end of the regulation wall portion 61 is carelessly positioned behind the opening edge of the rear end hole 22, and the front end and rear of the regulation wall portion 61 of the knock member 6 are inadvertently positioned. It is possible to avoid contact with the opening edge of the end hole 22.

本発明の熱変色性筆記具は、ペン先没入状態及びペン先突出状態のいずれであっても、摩擦体を用いた安定した摩擦操作が可能であり、しかも非使用時にノック部材を不用意に押圧してペン先を誤って突出状態にさせることを回避できる。 The thermochromic writing instrument of the present invention can perform stable friction operation using a friction body regardless of whether the pen tip is immersed or protruding, and inadvertently presses the knock member when not in use. This can prevent the pen tip from being accidentally projected.

本発明の実施の形態の非摩擦操作時のペン先没入状態を示す縦断面図である。It is a vertical cross-sectional view which shows the pen tip immersion state at the time of the non-friction operation of the embodiment of this invention. 図１の要部拡大縦断面図である。It is an enlarged vertical sectional view of the main part of FIG. 図１の摩擦操作時のペン先没入状態を示す縦断面図である。It is a vertical cross-sectional view which shows the pen tip immersion state at the time of the friction operation of FIG. 図３の要部拡大縦断面図である。FIG. 3 is an enlarged vertical sectional view of a main part of FIG. 図１の非摩擦操作時のペン先突出状態を示す縦断面図である。It is a vertical cross-sectional view which shows the pen tip protruding state at the time of a non-friction operation of FIG. 図５の要部拡大縦断面図である。FIG. 5 is an enlarged vertical sectional view of a main part of FIG. 図１の摩擦操作時のペン先突出状態を示す縦断面図である。It is a vertical cross-sectional view which shows the pen tip protruding state at the time of the friction operation of FIG. 図７の要部拡大縦断面図である。FIG. 7 is an enlarged vertical sectional view of a main part of FIG. （ａ）は、図１のノック部材６が前後方向に移動可能な状態を示す要部斜視図であり、（ｂ）は、図１のノック部材６の前後方向の移動が阻止された状態を示す要部斜視図である。(A) is a perspective view of a main part showing a state in which the knock member 6 of FIG. 1 can move in the front-rear direction, and (b) shows a state in which the knock member 6 of FIG. 1 is prevented from moving in the front-rear direction. It is the main part perspective view which shows. 図１の出没機構を示す分解図である。It is an exploded view which shows the appearance mechanism of FIG.

本発明の熱変色性筆記具１の実施の形態を図面に従って説明する。（図１乃至図１０参照） An embodiment of the thermochromic writing instrument 1 of the present invention will be described with reference to the drawings. (See FIGS. 1 to 10)

本実施の形態の熱変色性筆記具１は、軸筒２と、該軸筒２内に収容される筆記体３と、該筆記体３のペン先３１を軸筒２の前端孔２１より出没自在にさせる出没機構とを備える。前記軸筒２は、円筒状の前軸２ａと、該前軸２ａの後端に連結される円筒状の中間軸２ｂと、該中間軸２ｂの後端に連結される円筒状の後軸２ｃとからなる。 In the thermochromic writing instrument 1 of the present embodiment, the shaft cylinder 2, the writing body 3 housed in the shaft cylinder 2, and the pen tip 31 of the writing body 3 can freely appear and disappear from the front end hole 21 of the shaft cylinder 2. It is equipped with a haunting mechanism. The axle tube 2 includes a cylindrical front shaft 2a, a cylindrical intermediate shaft 2b connected to the rear end of the front shaft 2a, and a cylindrical rear shaft 2c connected to the rear end of the intermediate shaft 2b. It consists of.

・前軸
前軸２ａは、先細円筒状の合成樹脂の成形体である。前軸２ａの前端には前端孔２１３１が前後方向に貫設される。前軸２ａの側面には弾性材料からなる把持部が形成される。前軸２ａの後端開口部外面には、オネジ部が一体に形成される。 The front shaft front shaft 2a is a tapered cylindrical synthetic resin molded body. A front end hole 2131 is formed in the front end of the front shaft 2a in the front-rear direction. A grip portion made of an elastic material is formed on the side surface of the front shaft 2a. A male screw portion is integrally formed on the outer surface of the rear end opening of the front shaft 2a.

・中間軸
前記中間軸２ｂは、円筒状の合成樹脂の成形体である。前記中間軸２ｂの内面には、カム部が一体に形成される。中間軸２ｂの後端開口部の内面には、段部２３が形成される。 Intermediate shaft The intermediate shaft 2b is a cylindrical synthetic resin molded body. A cam portion is integrally formed on the inner surface of the intermediate shaft 2b. A step portion 23 is formed on the inner surface of the rear end opening of the intermediate shaft 2b.

・後軸
前記後軸２ｃは、円筒状の合成樹脂の成形体である。前記後軸２ｃの後端には、後端孔２２が前後方向に貫設される。前記後軸２ｃの側壁外面には、軸筒２外面とポケット等を挟持可能な前後方向に延びるクリップが設けられる。前記クリップは、後軸４の側壁外面に一体に形成されるか、または別部材の取り付けにより設けられる。 Rear shaft The rear shaft 2c is a cylindrical synthetic resin molded body. A rear end hole 22 is formed in the rear end of the rear shaft 2c in the front-rear direction. On the outer surface of the side wall of the rear shaft 2c, a clip extending in the front-rear direction that can hold the outer surface of the axle cylinder 2 and a pocket or the like is provided. The clip is integrally formed on the outer surface of the side wall of the rear shaft 4, or is provided by attaching a separate member.

後軸２ｃの後端孔２２の内面の横断面形状は、正六角形の形状を有する。後端孔２２の内面の横断面形状は、非円形状であれば、何れの形状であってもよく、例えば、正三角形、正四角形等の正多角形のほか、楕円形状であってもよい。 The cross-sectional shape of the inner surface of the rear end hole 22 of the rear shaft 2c has a regular hexagonal shape. The cross-sectional shape of the inner surface of the rear end hole 22 may be any shape as long as it is non-circular, and may be an elliptical shape as well as a regular polygon such as an equilateral triangle or a regular quadrangle. ..

・筆記体
筆記体３は、ペン先３１と、該ペン先３１が前端開口部に圧入固着されたインキ収容管３２と、該インキ収容管内３２に充填される熱変色性インキと、該熱変色性インキの後端に充填され且つ該熱変色性インキの消費に伴い前進する追従体（例えば高粘度流体）とからなる。 -Cursive The cursive 3 includes a pen tip 31, an ink storage tube 32 in which the pen tip 31 is press-fitted and fixed to the front end opening, a heat-discolorable ink filled in the ink storage tube 32, and the heat-discoloration. It is composed of a follower (for example, a high-viscosity fluid) that is filled in the rear end of the sex ink and advances with the consumption of the heat-discoloring ink.

前記ペン先３１は、例えば、前端に回転可能にボールを抱持した金属製のボールペンのみからなる構成、または前記ボールペンチップの後部外面を保持した合成樹脂製のペン先ホルダーからなる構成のいずれであってもよい。また、前記インキ収容管３２の後端開口部に、インキ収容管３２と外部とが通気可能な通気孔を備えた尾栓を取り付けてもよい。 The pen tip 31 may be composed of, for example, only a metal ballpoint pen having a ball rotatably held at the front end, or a synthetic resin pen tip holder holding the rear outer surface of the ballpoint pen tip. There may be. Further, a tail plug having a ventilation hole through which the ink storage tube 32 and the outside can be ventilated may be attached to the rear end opening of the ink storage tube 32.

・出没機構
出没機構（図１０参照）は、回転カム機構を用いたノック式出没機構であり、前記軸筒２内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯２４及びカム溝２５と、前記筆記体３の後端に当接され且つ前記軸筒２に対して回転可能に配置され、前記カム歯２４または前記カム溝２５に交互に係合可能な複数の突条４１を有する回転部材４と、前記回転部材４の後方に、前記軸筒２に対して回転不能且つ前後方向に移動可能に配置され、前記回転部材４を回動させる複数のカム突起５１を有するとともに前記軸筒２内面のカム溝２５に前後動自在に係合される複数の係合突起５２を有するカム部材５と、前記カム部材５を前方に押圧するノック部材６と、前記筆記体３を後方に付勢する弾発体７（例えば圧縮コイルスプリング）とからなる。出没機構は、ペン先突出操作及びペン先没入操作のいずれもがノック部材６を前方に押圧する操作のダブルノック式である。 The infestation mechanism The infestation mechanism (see FIG. 10) is a knock-type infestation mechanism using a rotary cam mechanism, which is formed on the inner surface of the barrel 2 and is arranged alternately along the circumferential direction and extends in the front-rear direction. The cam teeth 24 and the cam groove 25 of the above are in contact with the rear end of the writing body 3 and are rotatably arranged with respect to the barrel 2, and can be alternately engaged with the cam teeth 24 or the cam groove 25. A plurality of rotating members 4 having a plurality of ridges 41, and a plurality of rotating members 4 arranged behind the rotating member 4 so as to be non-rotatable and movable in the front-rear direction with respect to the barrel 2. A cam member 5 having a cam protrusion 51 and having a plurality of engagement protrusions 52 movably engaged with the cam groove 25 on the inner surface of the barrel 2 and a knock member 6 for pressing the cam member 5 forward. It is composed of an elastic body 7 (for example, a compression coil spring) that urges the writing body 3 rearward. The withdrawal mechanism is a double knock type in which both the pen tip protruding operation and the pen tip immersive operation press the knock member 6 forward.

・回転部材
回転部材４は、その外面に長手方向に延びる３本の突条４１を備え、該突条４１がカム溝２５と係合される。回転部材４は、円筒状の合成樹脂の成形体である。回転部材４の内壁に、常時、筆記体３の後端が当接される。 -Rotating member The rotating member 4 is provided with three ridges 41 extending in the longitudinal direction on its outer surface, and the ridges 41 are engaged with the cam groove 25. The rotating member 4 is a cylindrical synthetic resin molded body. The rear end of the cursive 3 is always in contact with the inner wall of the rotating member 4.

・カム部材
カム部材５は、円筒状の合成樹脂の成形体である。カム部材５の前端部に、カム溝２５内を摺動する係合突起５２と、回転部材４の突条４１の後端と係合するカム突起５１とが設けられる。 -Cam member The cam member 5 is a cylindrical synthetic resin molded body. An engaging projection 52 that slides in the cam groove 25 and a cam projection 51 that engages with the rear end of the ridge 41 of the rotating member 4 are provided at the front end of the cam member 5.

・ノック部材
ノック部材６が、筒状体であり、前方に開口する前側筒部と、後方に開口する後側筒部とを備える。前側筒部の開口部には、回転部材４の後端部が挿入される。前側筒部の外面には、
径方向外方に突出する係止壁部６２が形成される。係止壁部６２にノック部材用弾発体９の前端が係止される。後側筒部の開口部には、弾性材料（例えば、シリコーン樹脂、ＳＢＳ樹脂、ＳＥＢＳ樹脂等）よりなる摩擦部８が固着される。 Knock member The knock member 6 is a tubular body and includes a front cylinder portion that opens forward and a rear cylinder portion that opens rearward. The rear end portion of the rotating member 4 is inserted into the opening of the front cylinder portion. On the outer surface of the front cylinder,
A locking wall portion 62 that projects outward in the radial direction is formed. The front end of the knock member elastic body 9 is locked to the locking wall portion 62. A friction portion 8 made of an elastic material (for example, silicone resin, SBS resin, SEBS resin, etc.) is fixed to the opening of the rear cylinder portion.

ノック部材６の側壁外面には、後端孔２２に挿入可能な規制壁部６１が形成される。規制壁部６１の外面の横断面形状が、後端孔２２の内面の横断面形状と対応し、正六角形状を有する。規制壁部６１の外面横断面形状は、非円形状であれば、何れの形状であってもよく、六角形状以外に、例えば、正三角形、正四角形等の正多角形のほか、楕円形状であってもよい。また、摩擦部８の外面の横断面形状が、後端孔２２の内面の横断面形状と対応し、六角形状を有する。それにより、摩擦部８が規制壁部６１の一部となり、後端孔２２に挿入可能である。規制壁部６１の外面の横断面形状が非円形状または多角形状を有するため、規制壁部６１を指でつまんで回転操作することが容易となる。 A regulation wall portion 61 that can be inserted into the rear end hole 22 is formed on the outer surface of the side wall of the knock member 6. The cross-sectional shape of the outer surface of the regulation wall portion 61 corresponds to the cross-sectional shape of the inner surface of the rear end hole 22, and has a regular hexagonal shape. The cross-sectional shape of the outer surface of the regulation wall portion 61 may be any shape as long as it is non-circular, and in addition to the hexagonal shape, for example, a regular polygon such as an equilateral triangle or a regular quadrangle, or an elliptical shape. There may be. Further, the cross-sectional shape of the outer surface of the friction portion 8 corresponds to the cross-sectional shape of the inner surface of the rear end hole 22, and has a hexagonal shape. As a result, the friction portion 8 becomes a part of the regulation wall portion 61 and can be inserted into the rear end hole 22. Since the cross-sectional shape of the outer surface of the regulation wall portion 61 has a non-circular shape or a polygonal shape, it is easy to pinch the regulation wall portion 61 with a finger and rotate it.

・ノック部材用弾発体
ノック部材６は、ノック部材用弾発体９（例えば圧縮コイルスプリング）により、前方付勢される。ノック部材用弾発体９の弾発力は、筆記体３を後方に付勢する弾発体７の弾発力より小さく設定される。ノック部材用弾発体９の前端は、ノック部材６の係止壁部６２に係止され、ノック部材用弾発体９の後端は、軸筒２（後軸２ｃ）の後端部の内壁に係止される。ノック部材６がノック部材用弾発体９の前方付勢されることにより、ノック部材６とカム部材５とが常時前後方向に当接状態にされる。 -Knock member elastic body The knock member 6 is urged forward by the knock member elastic body 9 (for example, a compression coil spring). The elastic force of the knocking member 9 is set to be smaller than the elastic force of the elastic body 7 that biases the cursive 3 backward. The front end of the knock member elastic body 9 is locked to the locking wall portion 62 of the knock member 6, and the rear end of the knock member elastic body 9 is the rear end portion of the barrel 2 (rear shaft 2c). Locked to the inner wall. When the knock member 6 is urged forward of the knock member elastic body 9, the knock member 6 and the cam member 5 are always in contact with each other in the front-rear direction.

・ノック部材の規制壁部の作動
図１、図２、図５及び図６に、ノック部材６の前方への押圧操作可能状態を示す。
この状態において、規制壁部６１が後端孔２２内に前後方向移動可能に配置される。ペン先３１の出没操作が可能である。 -Operation of the regulation wall portion of the knock member FIGS. 1, 2, 5, and 6 show a state in which the knock member 6 can be pressed forward.
In this state, the regulation wall portion 61 is arranged in the rear end hole 22 so as to be movable in the front-rear direction. The pen tip 31 can be moved in and out.

図３、図４、図７及び図８に、ノック部材６の前方への押圧操作が阻止された状態を示す。
この状態は、前記図１、図２、図５及び図６の状態から、ノック部材６を軸筒２に対してノック部材用弾発体９の後方付勢に抗して後方に引くと同時に回転させることにより得る。この状態において、規制壁部６１の前端が後端孔２２の開口縁部に当接され、ノック部材６の前方移動が阻止される。それにより、摩擦部８を用いた安定した摩擦操作が可能となる。 3, FIG. 4, FIG. 7 and FIG. 8 show a state in which the forward pressing operation of the knock member 6 is blocked.
In this state, at the same time as pulling the knock member 6 backward against the axle cylinder 2 against the rearward bias of the knock member elastic body 9 from the states of FIGS. 1, 2, 5, and 6. Obtained by rotating. In this state, the front end of the regulation wall portion 61 is brought into contact with the opening edge portion of the rear end hole 22, and the knock member 6 is prevented from moving forward. As a result, stable friction operation using the friction portion 8 becomes possible.

本実施の形態の熱変色性筆記具１は、筆記体３の内部に熱変色性インキを収容し、前記筆記体３の前端に前記熱変色性インキが吐出可能なペン先３１を設け、前記筆記体３を軸筒２内に前後方向に移動可能に収容し、前記軸筒２の後端孔２２より後方にノック部材６を突出させ、前記ノック部材６を前方に押圧することによりペン先３１を軸筒２の前端孔２１から突出状態にし、再度、前記ノック部材６を前方に押圧することにより前記ペン先突出状態を解除しペン先３１を軸筒２の前端孔２１より軸筒２内に没入状態にする出没機構を備え、前記ノック部材６の後端部外面に、前記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前記熱変色性インキの筆跡を熱変色可能な摩擦部８を設けた熱変色性筆記具であって、前記出没機構が、前記軸筒２内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯２４及びカム溝２５と、前記筆記体３の後方に前記軸筒２に対して回転可能に配置され、前記カム歯２４または前記カム溝２５に交互に係合可能な複数の突条４１を有する回転部材４と、前記回転部材４の後方に、前記軸筒２に対して回転不能且つ前後方向に移動可能に配置され、前記回転部材４を回動させる複数のカム突起５１を有するとともに前記軸筒２内面のカム溝２５に前後動自在に係合される複数の係合突起５２を有するカム部材５と、前記カム部材５を前方に押圧するノック部材６と、前記筆記体３を後方に付勢する弾発体７と、を備え、前記軸筒２の後端孔２２の開口部内面の横断面形状を非円形状とするとともに、前記ノック部材６の側壁に、前記後端孔２２に挿入可能な規制壁部６１が形成され、前記規制壁部６１の外面の横断面形状を、前記後端孔２２の内面の形状に対応した非円形状とし、前記ノック部材６の規制壁部６１が前記後端孔２２内にあるとき、前記ノック部材６の前方への押圧操作が可能となり、前記ノック部材６の規制壁部６１が前記後端孔２２の開口部より後方に位置されたとき、前記ノック部材６が前記軸筒２に対して回転可能となり、前記ノック部材６が前記軸筒２に対して回転操作され、前記ノック部材６の規制壁部６１の前端が前記軸筒２の後端孔２２の開口縁部に当接された状態のとき、前記ノック部材６の前方移動が阻止される。 The thermochromic writing tool 1 of the present embodiment accommodates cursive ink inside the cursive 3, and provides a pen tip 31 capable of ejecting the thermochromic ink at the front end of the cursive 3, and writes the cursive. The body 3 is housed in the barrel 2 so as to be movable in the front-rear direction, the knock member 6 is projected rearward from the rear end hole 22 of the barrel 2, and the knock member 6 is pressed forward to push the pen tip 31 forward. Is projected from the front end hole 21 of the barrel 2 and the knock member 6 is pressed forward again to release the pen tip protruding state, and the pen tip 31 is moved into the barrel 2 from the front end hole 21 of the barrel 2. The cursive of the heat-discoloring ink is rubbed against the outer surface of the rear end portion of the knock member 6, and the frictional heat generated at that time can thermally change the cursive of the heat-discoloring ink. A thermochromic writing tool provided with a friction portion 8, wherein the infestation mechanism is formed on the inner surface of the barrel 2, and a plurality of cam teeth 24 and cams extending in the front-rear direction alternately arranged along the circumferential direction. A rotating member 4 having a groove 25 and a plurality of ridges 41 rotatably arranged behind the cursive 3 with respect to the barrel 2 and alternately engaged with the cam teeth 24 or the cam groove 25. And, behind the rotating member 4, a plurality of cam protrusions 51 which are arranged so as to be non-rotatable with respect to the barrel 2 and movable in the front-rear direction and rotate the rotating member 4 are provided, and the inner surface of the barrel 2 is provided. A cam member 5 having a plurality of engaging protrusions 52 that are movably engaged with the cam groove 25 of the above, a knock member 6 that presses the cam member 5 forward, and the cursive 3 are urged rearward. The elastic body 7 is provided, and the cross-sectional shape of the inner surface of the opening of the rear end hole 22 of the barrel 2 is non-circular, and can be inserted into the rear end hole 22 on the side wall of the knock member 6. The regulation wall portion 61 is formed, and the cross-sectional shape of the outer surface of the regulation wall portion 61 is a non-circular shape corresponding to the shape of the inner surface of the rear end hole 22, and the regulation wall portion 61 of the knock member 6 is said. When it is inside the rear end hole 22, the knock member 6 can be pressed forward, and when the regulation wall portion 61 of the knock member 6 is positioned behind the opening of the rear end hole 22, the above-mentioned The knock member 6 becomes rotatable with respect to the barrel 2, the knock member 6 is rotated with respect to the barrel 2, and the front end of the regulation wall portion 61 of the knock member 6 is the rear end of the barrel 2. When in contact with the opening edge of the hole 22, the knock member 6 is prevented from moving forward.

本実施の形態の熱変色性筆記具１は、前記構成により、前記構成により、ペン先没入状態及びペン先突出状態のいずれであっても、摩擦体を用いた安定した摩擦操作が可能であり、しかも非使用時にノック部材６を不用意に押圧してペン先３１を誤って突出状態にさせることを回避できる。 According to the above configuration, the thermochromic writing instrument 1 of the present embodiment enables stable friction operation using a friction body regardless of whether the pen tip is in the immersive state or the pen tip is in the protruding state. Moreover, it is possible to avoid inadvertently pressing the knock member 6 when not in use to accidentally cause the pen tip 31 to protrude.

本実施の形態の熱変色性筆記具１は、前記ノック部材６が前記軸筒２に対して前方に付勢され、前記ノック部材６の規制壁部６１が前後方向に移動可能に前記後端孔２２内に配置される。それにより、通常の筆記使用時において、規制壁部６１が常時、後端孔２２内に配置されるため、摩擦部８を用いて摩擦操作するとき以外に、不用意に、規制壁部６１の前端が後端孔２２の開口縁部より後方に位置され、ノック部材６の規制壁部６１の前端と後端孔２２の開口縁部とが当接されることを回避できる。 In the thermochromic writing instrument 1 of the present embodiment, the knock member 6 is urged forward with respect to the barrel 2, and the regulation wall portion 61 of the knock member 6 can move in the front-rear direction. It is arranged in 22. As a result, the regulation wall portion 61 is always arranged in the rear end hole 22 during normal writing use, so that the regulation wall portion 61 is carelessly arranged except when the friction portion 8 is used for friction operation. The front end is located behind the opening edge of the rear end hole 22, and it is possible to prevent the front end of the regulation wall portion 61 of the knock member 6 from coming into contact with the opening edge of the rear end hole 22.

１ 熱変色性筆記具
２ 軸筒
２１ 前端孔
２２ 後端孔
２３ 段部
２４ カム歯
２５ カム溝
２ａ 前軸
２ｂ 中間軸
２ｃ 後軸
３ 筆記体
３１ ペン先
３２ インキ収容管
４ 回転部材
４１ 突条
５ カム部材
５１ カム突起
５２ 係合突起
６ ノック部材
６１ 規制壁部
６２ 係止壁部
７ 弾発体
８ 摩擦部
９ ノック部材用弾発体 1 Thermal discoloration writing tool 2 Shaft cylinder 21 Front end hole 22 Rear end hole 23 Step part 24 Cam tooth 25 Cam groove 2a Front shaft 2b Intermediate shaft 2c Rear shaft 3 Writing body 31 Pen tip 32 Ink storage tube 4 Rotating member 41 Protrusion 5 Cam member 51 Cam protrusion 52 Engagement protrusion 6 Knock member 61 Restriction wall part 62 Locking wall part 7 Repellent 8 Friction part 9 Repellent for knock member

Claims (2)

筆記体の内部に熱変色性インキを収容し、前記筆記体の前端に前記熱変色性インキが吐出可能なペン先を設け、前記筆記体を軸筒内に前後方向に移動可能に収容し、前記軸筒の後端孔より後方にノック部材を突出させ、前記ノック部材を前方に押圧することによりペン先を軸筒の前端孔から突出状態にし、再度、前記ノック部材を前方に押圧することにより前記ペン先突出状態を解除しペン先を軸筒の前端孔より軸筒内に没入状態にする出没機構を備え、前記ノック部材の後端部外面に、前記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前記熱変色性インキの筆跡を熱変色可能な摩擦部を設けた熱変色性筆記具であって、
前記出没機構が、前記軸筒内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯及びカム溝と、前記筆記体の後方に前記軸筒に対して回転可能に配置され、前記カム歯または前記カム溝に交互に係合可能な複数の突条を有する回転部材と、前記回転部材の後方に、前記軸筒に対して回転不能且つ前後方向に移動可能に配置され、前記回転部材を回動させる複数のカム突起を有するとともに前記軸筒内面のカム溝に前後動自在に係合される複数の係合突起を有するカム部材と、前記カム部材を前方に押圧するノック部材と、前記筆記体を後方に付勢する弾発体と、を備え、
前記軸筒の後端孔の開口部内面の横断面形状を非円形状とするとともに、
前記ノック部材の側壁に、前記後端孔に挿入可能な規制壁部が形成され、前記規制壁部の外面の横断面形状を、前記後端孔の内面の形状に対応した非円形状とし、
前記ノック部材の規制壁部が前記後端孔内にあるとき、前記ノック部材の前方への押圧操作が可能となり、
前記ノック部材の規制壁部が前記後端孔の開口部より後方に位置されたとき、前記ノック部材が前記軸筒に対して回転可能となり、
前記ノック部材が前記軸筒に対して回転操作され、前記ノック部材の規制壁部の前端が前記軸筒の後端孔の開口縁部に当接された状態のとき、前記ノック部材の前方移動が阻止されることを特徴とする熱変色性筆記具。 A thermochromic ink is housed inside the cursive, a pen tip capable of ejecting the heat-coloring ink is provided at the front end of the cursive, and the cursive is housed in a barrel so as to be movable in the front-rear direction. A knock member is projected rearward from the rear end hole of the barrel, and the knock member is pressed forward to bring the pen tip into a protruding state from the front end hole of the barrel, and the knock member is pressed forward again. The pen tip is provided with a retracting mechanism that releases the protruding state of the pen tip and allows the pen tip to be immersed in the barrel through the front end hole of the barrel, and rubs the cursive of the heat-discoloring ink on the outer surface of the rear end of the knock member. A heat-discoloring writing tool provided with a friction portion capable of thermally discoloring the cursive of the heat-discoloring ink by the frictional heat generated at that time.
A plurality of cam teeth and cam grooves extending in the front-rear direction, which are formed on the inner surface of the barrel and are alternately arranged along the circumferential direction, and a rotation mechanism behind the writing body with respect to the barrel. A rotating member that is possibly arranged and has a plurality of ridges that can be alternately engaged with the cam teeth or the cam groove, and behind the rotating member, which is non-rotatable with respect to the axle and can move in the front-rear direction. A cam member having a plurality of cam protrusions for rotating the rotating member and having a plurality of engaging protrusions movably engaged with the cam groove on the inner surface of the axle cylinder, and the cam member forward. A knock member that presses against the body and a projectile that urges the writing body rearward are provided.
The cross-sectional shape of the inner surface of the opening of the rear end hole of the axle tube is a non-circular shape, and
A regulation wall portion that can be inserted into the rear end hole is formed on the side wall of the knock member, and the cross-sectional shape of the outer surface of the regulation wall portion is a non-circular shape corresponding to the shape of the inner surface of the rear end hole.
When the regulation wall portion of the knock member is inside the rear end hole, the knock member can be pressed forward.
When the regulation wall portion of the knock member is positioned behind the opening of the rear end hole, the knock member becomes rotatable with respect to the axle cylinder.
When the knock member is rotated with respect to the axle and the front end of the regulation wall portion of the knock member is in contact with the opening edge of the rear end hole of the axle, the knock member moves forward. A thermochromic writing instrument characterized by being blocked. 前記ノック部材が前記軸筒に対して前方に付勢され、前記ノック部材の規制壁部が前後方向に移動可能に前記後端孔内に配置される請求項１記載の熱変色性筆記具。
The thermochromic writing instrument according to claim 1, wherein the knock member is urged forward with respect to the barrel, and the regulation wall portion of the knock member is arranged in the rear end hole so as to be movable in the front-rear direction.
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