JP6440784B2 - Thermochromic writing instrument - Google Patents

Thermochromic writing instrument Download PDF

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JP6440784B2
JP6440784B2 JP2017143303A JP2017143303A JP6440784B2 JP 6440784 B2 JP6440784 B2 JP 6440784B2 JP 2017143303 A JP2017143303 A JP 2017143303A JP 2017143303 A JP2017143303 A JP 2017143303A JP 6440784 B2 JP6440784 B2 JP 6440784B2
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pen tip
shaft
state
friction
axial direction
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JP2017206025A (en
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治巳 山内
治巳 山内
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Pilot Ink Co Ltd
Pilot Corp KK
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Pilot Ink Co Ltd
Pilot Corp KK
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  • Clips For Writing Implements (AREA)
  • Pens And Brushes (AREA)

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.

特許文献１には、内部に熱変色性インキを収容した筆記体を軸筒内に収容し、前記軸筒に設けた操作体を操作して前記筆記体を前後方向に移動させ、前記筆記体のペン先を筆記具の先端から出没可能に構成した熱変色性筆記具であって、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該筆跡を熱変色可能な摩擦部と、少なくとも一の前記操作体としてのクリップ体とを備え、前記摩擦部を前記軸筒の後端に設けるとともに、前記軸筒における後端以外の部位に前記クリップ体を設けたことを特徴とする熱変色性筆記具が記載されている。 In Patent Document 1, a writing body containing a thermochromic ink is accommodated in a shaft cylinder, and the writing body is moved in the front-rear direction by operating an operating body provided on the shaft cylinder. A thermochromic writing tool configured to allow the pen tip of the writing tool to be projected and retracted from the tip of the writing tool, the friction part capable of thermally changing the handwriting by frictional heat generated by rubbing the handwriting of the thermochromic ink, and at least A thermal discoloration comprising: a clip body as one operation body, wherein the friction portion is provided at a rear end of the shaft cylinder, and the clip body is provided at a portion other than the rear end of the shaft cylinder. Sex writing instruments are listed.

前記特許文献１の熱変色性筆記具は、携帯時や摩擦部を用いた摩擦操作時、誤って操作部に触れ、操作部を前方に押圧操作してしまうおそれがある。 The thermochromic writing instrument of Patent Document 1 may accidentally touch the operation unit and push the operation unit forward when carrying it or performing a friction operation using the friction unit.

特開２０１２−６３１５号公報JP 2012-6315 A

本発明は、前記従来の問題点を解決するものであって、携帯時や摩擦操作時、操作部を誤って前方に押圧操作することを回避でき、しかも、円滑な摩擦操作性が維持される熱変色性筆記具を提供しようとするものである。
尚、本発明において、軸筒において、「前」とは前端孔側を指し、「後」とはその反対側を指し、筆記体において、「前」とはペン先側を指し、「後」とはその反対側を指す。本発明において、「ペン没入状態」とは、ペン先が軸筒内に没入された状態をいい、「ペン先突出状態」とはペン先が軸筒の前端孔より外部に突出した状態をいう。 The present invention solves the above-mentioned conventional problems, and can avoid pressing the operating part forward by mistake when carrying or performing a friction operation, while maintaining a smooth friction operability. An object is to provide a thermochromic writing instrument.
In the present invention, in the barrel, "front" refers to the front end hole side, "rear" refers to the opposite side, in the cursive, "front" refers to the pen tip side, "rear" Refers to the opposite side. In the present invention, the “pen immersion state” means a state in which the pen tip is immersed in the shaft cylinder, and the “pen tip protruding state” means a state in which the pen tip protrudes outside from the front end hole of the shaft cylinder. .

本願発明は、軸筒２の内部に筆記体３を軸方向に移動可能に収容し、前記筆記体３の内部に熱変色性インキ３３を収容し、前記筆記体３の前端に前記熱変色性インキ３３が吐出可能なペン先３１を設け、前記軸筒２の側壁に軸方向に延びるスライド孔２２を設け、前記スライド孔２２より操作部４を径方向外方に突出させ、前記操作部４を前記スライド孔２２に沿って軸方向に移動可能に構成し、前記操作部４を前方にスライド操作することにより前記筆記体３をペン先没入状態からペン先突出状態にさせ、前記軸筒２の後端部に、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７を設けた熱変色性筆記具であって、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置を、前記摩擦部７より前方の軸筒２外面に設け、前記操作部４が、スライド孔２２より径方向外方に突出される基部４１と、該基部４１より前方に連設されるクリップ部４２とを備え、前記操作部４の基部４１が前記スライド孔２２に沿って軸方向に移動可能に構成され、前記ロック装置が、軸筒２の外面に周方向に回転可能且つ軸方向移動不能に取り付けられる、切り欠き部８１を有する横断面Ｃ字状のロック部材８を備え、前記ロック部材８の切り欠き部８１以外の部分を前記操作部４の基部４１よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記ロック部材８により前記操作部４の基部４１の前方への移動が阻止され、一方、前記ロック部材８の切り欠き部８１を前記操作部４の基部４１よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の基部４１の前方への移動が可能となり、ペン先没入状態において前記ロック部材８が前記基部４１の前端に近接配置されることを要件とする。 In the present invention, the writing body 3 is accommodated in the axial tube 2 so as to be movable in the axial direction, the thermochromic ink 33 is accommodated in the writing body 3, and the thermochromic property is provided at the front end of the writing body 3. A pen nib 31 capable of ejecting ink 33 is provided, a slide hole 22 extending in the axial direction is provided on the side wall of the shaft cylinder 2, and the operation unit 4 protrudes radially outward from the slide hole 22. Is configured to be movable in the axial direction along the slide hole 22, and by sliding the operation unit 4 forward, the writing body 3 is changed from the pen tip immersive state to the pen tip protruding state. A thermochromic writing instrument provided with a friction part 7 made of a low-abrasion elastic material capable of thermally discoloring the handwriting of the thermochromic ink by rubbing the handwriting of the thermochromic ink at the rear end thereof. The forward movement of the operation unit 4 in the pen tip immersion state A locking device for blocking is provided on the outer surface of the shaft cylinder 2 in front of the friction part 7, and the operation part 4 is provided in series with a base part 41 projecting radially outward from the slide hole 22 and forward of the base part 41. A clip portion 42, the base portion 41 of the operation portion 4 is configured to be movable in the axial direction along the slide hole 22, and the locking device is rotatable on the outer surface of the shaft tube 2 in the circumferential direction; A locking member 8 having a C-shaped cross section having a notch portion 81 that is attached so as not to move in the axial direction is provided, and a portion other than the notch portion 81 of the locking member 8 is located in front of the base portion 41 of the operation portion 4. When in the state of being positioned on the slide hole 22, the lock member 8 prevents the operation portion 4 from moving forward on the base 41, while the notch portion 81 of the lock member 8 is moved to the operation portion. From the base 41 of 4 When in the state of being positioned on the front of the slide hole 22, Ri Do allow forward movement of the base portion 41 of the operation portion 4, the locking member 8 in the pen tip retracted state at the front end of the base portion 41 closely spaced is required for the Rukoto.

本願発明の熱変色性筆記具１は、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置を、前記摩擦部７より前方の軸筒２外面に設けたことにより、携帯時や摩擦操作時、ロック装置をロック状態にすることによって、操作部４を誤って前方に押圧操作することを回避でき、しかも、ロック状態のロック装置が摩擦操作性を阻害することなく、円滑な摩擦操作が可能となる。尚、本発明の出没機構は、少なくとも、ペン先突出操作（ペン先を没入状態から突出状態にさせる操作）が、操作部を前方にスライドさせる構造であり、ペン先没入操作（ペン先を突出状態から没入状態にさせる操作）は、ペン先突出操作同様、操作部を前方にスライドさせる構造であってもよいし、それ以外でもよい。 Thermochromic writing instrument 1 of the present application onset Ming, by a locking device for preventing the forward movement of the operating portion 4 in the pen tip retracted state, provided in the barrel 2 the outer surface of the front from the friction part 7, a mobile By setting the lock device to the locked state at the time or during the friction operation, it is possible to avoid accidentally pressing the operation unit 4 forward, and the locked device in the locked state can be smoothly operated without impairing the friction operability. Frictional operation is possible. The retracting mechanism of the present invention has a structure in which at least the pen tip protruding operation (operation for moving the pen tip from the immersive state to the protruding state) slides the operation unit forward, and the pen tip immersing operation (the pen tip protrudes). The operation from the state to the immersive state may be a structure in which the operating portion is slid forward, as well as the pen tip protruding operation, or may be other than that.

本願発明の熱変色性筆記具１は、前記ロック装置が、軸筒２の外面に周方向に回転可能且つ軸方向移動不能に取り付けられる、切り欠き部８１を有する横断面Ｃ字状のロック部材８を備え、前記ロック部材８の切り欠き部８１以外の部分を前記操作部４の基部４１よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の基部４１の前方への移動が阻止され、一方、前記ロック部材８の切り欠き部８１を前記操作部４の基部４１よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の基部４１の前方への移動が可能となることにより、部品点数の少ない簡易なロック装置を得るとともに、ロック装置によってクリップの外観性が損なわれることがない。 Thermochromic writing instrument 1 of the present application onset Ming, the locking device, and can rotate on the outer surface of the barrel 2 in the circumferential direction is mounted axially immovable, C-shaped cross section of the locking member having a notch portion 81 with 8, when in the state in which the portions other than the notched portion 81 is positioned on the front of the slide hole 22 than the base 41 of the operating part 4 of the locking member 8, the base portion 41 of the operation section 4 When the forward movement is blocked and the notch 81 of the lock member 8 is positioned on the slide hole 22 in front of the base 41 of the operation unit 4 , By allowing the base 41 to move forward, a simple locking device with a small number of parts is obtained, and the appearance of the clip is not impaired by the locking device.

本発明の熱変色性筆記具によれば、携帯時や摩擦操作時、操作部を誤って前方に押圧操作することを回避でき、しかも、円滑な摩擦操作性が維持される。 According to the thermochromic writing instrument of the present invention, it is possible to avoid accidentally pressing the operation unit forward when carrying or performing a friction operation, and smooth friction operability is maintained.

本発明の第１の実施の形態のペン先没入状態を示す側面図である。It is a side view which shows the nib immersion state of the 1st Embodiment of this invention. 図１の正面図である。It is a front view of FIG. 図１のペン先突出状態を示す側面図である。It is a side view which shows the pen tip protrusion state of FIG. 図１の縦断面図である。It is a longitudinal cross-sectional view of FIG. 図３の縦断面図である。It is a longitudinal cross-sectional view of FIG. 本発明の第２の実施の形態のペン先没入状態を示す側面図である。It is a side view which shows the pen tip immersion state of the 2nd Embodiment of this invention. 図６の正面図である。FIG. 7 is a front view of FIG. 6. 図６のペン先突出状態を示す側面図である。It is a side view which shows the pen tip protrusion state of FIG. 図６の縦断面図である。It is a longitudinal cross-sectional view of FIG. 図８の縦断面図である。It is a longitudinal cross-sectional view of FIG. 本発明の第３の実施の形態のペン先没入状態を示す側面図である。It is a side view which shows the pen tip immersion state of the 3rd Embodiment of this invention. 図１１のペン先突出状態を示す側面図である。It is a side view which shows the pen tip protrusion state of FIG. 図１１のＡ−Ａ線拡大矢視断面図である。It is an AA line expanded arrow sectional view of FIG. 図１２のＢ−Ｂ線拡大断面図である。It is a BB line expanded sectional view of Drawing 12. 図１１の縦断面図である。It is a longitudinal cross-sectional view of FIG. 本発明の第４の実施の形態のペン先没入状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip immersion state of the 4th Embodiment of this invention. 図１６のペン先突出状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip protrusion state of FIG. 熱変色性インキの変色挙動を示す説明図である。It is explanatory drawing which shows the color change behavior of a thermochromic ink.

図１乃至図５に本発明の実施の形態を示す。 1 to 5 show an embodiment of the present invention.

＜第１の実施の形態＞
図１及び図５に本発明の第１の実施の形態を示す。
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、軸筒２の側壁より径方向外方に突出された操作部４と、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置と、軸筒２の後端部外面に設けた摩擦部７とを備える。 <First Embodiment>
1 and 5 show a first embodiment of the present invention.
The thermochromic writing instrument 1 of the present embodiment includes a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a pen tip 31 of the writing body 3 that can be projected and retracted from a front end hole 21 of the shaft tube 2. An operation mechanism 4 that protrudes radially outward from the side wall of the shaft cylinder 2, a lock device that prevents the operation section 4 from moving forward in the pen tip immersion state, And a friction part 7 provided on the outer surface of the rear end part.

・筆記体
前記筆記体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３２内に充填される熱変色性インキ３３と、該熱変色性インキ３３の後端に充填され且つ該熱変色性インキ３３の消費に伴い前進する追従体３４（例えば高粘度流体）とからなる。 Writing body The writing body 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, and a thermochromic ink 33 filled in the ink storage tube 32. It comprises a follower 34 (for example, a high-viscosity fluid) that fills the rear end of the thermochromic ink 33 and moves forward as the thermochromic ink 33 is consumed.

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チップのみからなる構成、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が取り付けられる。前記ペン先３１の内部には、前端のボールを前方に押圧するスプリングが収容される。前記スプリングは、圧縮コイルスプリングの前端部にロッド部を備えた構成であり、前記ロッド部の前端がボール後面に接触している。非筆記時、前記スプリングの前方付勢によりボールがボールペンチップ前端の内向きの前端縁部内面に密接され、ペン先３１の前端からのインキの漏出及びインキの蒸発を防止できる。 For example, the pen tip 31 includes only a metal ball-point pen tip that holds a ball rotatably at the front end, or a configuration that includes a pen tip holder made of a synthetic resin that holds a rear outer surface of the ball-point pen tip. It may be. Further, a tail plug having a vent hole through which the ink containing tube 32 and the outside can be vented is attached to the rear end opening of the ink containing tube 32. A spring that presses the ball at the front end forward is housed inside the nib 31. The spring includes a rod portion at a front end portion of a compression coil spring, and the front end of the rod portion is in contact with the rear surface of the ball. When not writing, the ball is brought into close contact with the inner surface of the front end edge portion of the front end of the ballpoint pen tip by the forward urging of the spring, thereby preventing ink leakage and ink evaporation from the front end of the pen tip 31.

・軸筒
前記軸筒２は、先細円筒状の前軸２ａと、該前軸２ａの後端部に連結される円筒状の中間軸２ｂと、該中間軸２ｂの後端部に連結される円筒状の後軸２ｃとからなる。前記軸筒２側壁（例えば中間軸２ｂの側壁及び後軸２ｃの側壁）には、軸方向に延びるスライド孔２２が形成される。前記軸筒２の後端（即ち後軸２ｃの後端）には、取付孔２３が軸方向に貫設される。前記取付孔２３に弾性材料からなる摩擦部７が圧入嵌合される。前記摩擦部７は、前記操作部４の軸方向の移動に連動せず、後軸２ｃ（軸筒２）の後端外面に固定される。前記摩擦部７は、操作部４と独立して設けられる。 The shaft cylinder 2 is connected to the tapered cylindrical front shaft 2a, the cylindrical intermediate shaft 2b connected to the rear end portion of the front shaft 2a, and the rear end portion of the intermediate shaft 2b. It consists of a cylindrical rear shaft 2c. A slide hole 22 extending in the axial direction is formed in the side wall of the shaft cylinder 2 (for example, the side wall of the intermediate shaft 2b and the side wall of the rear shaft 2c). A mounting hole 23 is provided in the axial direction at the rear end of the shaft cylinder 2 (that is, the rear end of the rear shaft 2c). The friction part 7 made of an elastic material is press-fitted into the mounting hole 23. The friction portion 7 is fixed to the outer surface of the rear end of the rear shaft 2c (shaft cylinder 2) without interlocking with the movement of the operation portion 4 in the axial direction. The friction part 7 is provided independently of the operation part 4.

・出没機構
前記出没機構は、回転カム機構を用いたサイドスライド式出没機構である。前記出没機構は、中間軸２ｂ内面に形成されたカム部と、該カム部に係合し且つ筆記体３の後端に当接する回転部材５と、該回転部材５に係合し且つスライド孔２２より径方向外方に突出する操作部４と、軸筒２内に収容され且つ筆記体３を後方に付勢する弾発体６（例えば圧縮コイルスプリング）とからなる。本実施の形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもが操作部４を前方にスライド操作するダブルノック式である。前記回転部材５は合成樹脂（例えばポリアセタール樹脂）の成形体により得られる。 -Intrusion mechanism The intrusion mechanism is a side slide type intrusion mechanism using a rotating cam mechanism. The retracting mechanism includes a cam portion formed on the inner surface of the intermediate shaft 2b, a rotating member 5 that engages with the cam portion and contacts the rear end of the writing body 3, and engages with the rotating member 5 and slide holes. The operation part 4 protrudes radially outward from 22 and the elastic body 6 (for example, compression coil spring) accommodated in the shaft cylinder 2 and biases the writing body 3 backward. The retracting mechanism of the present embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation slide the operation unit 4 forward. The rotating member 5 is obtained from a molded body of synthetic resin (for example, polyacetal resin).

前記カム部は、前方に突出する鋸歯状の複数のカム歯と、該カム歯間に形成される、軸方向に延びる複数のカム溝とを備える。前記回転部材５は、その外面に軸方向に延びる複数本（例えば４本）の突条を備え、該突条が、カム部のカム歯及びカム部のカム溝と係合される。前記操作部４の軸部４３の前端には、回転部材５の突条の後端と係合するカム歯が一体または別部材の取り付けにより形成される。 The cam portion includes a plurality of serrated cam teeth protruding forward and a plurality of cam grooves extending between the cam teeth and extending in the axial direction. The rotating member 5 includes a plurality of (for example, four) protrusions extending in the axial direction on the outer surface thereof, and the protrusions are engaged with cam teeth of the cam portion and cam grooves of the cam portion. At the front end of the shaft portion 43 of the operation portion 4, cam teeth that engage with the rear end of the protrusion of the rotating member 5 are formed integrally or by attaching another member.

・操作部
前記操作部４は、軸筒２側壁の軸方向に延びるスライド孔２２より径方向外方に突出される基部４１と、該基部４１より前方に連設されるクリップ部４２と、該基部４１より連設され且つ軸筒２内に軸方向に移動可能に収容される軸部４３と、を備える。前記クリップ部４２は、ポケット等の衣服を挟持可能である。前記操作部４は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体により得られる。前記クリップ部４２の裏面（内面）に玉部４４が突設される。前記基部４１と前記クリップ部４２、前記基部４１と前記軸部４３、前記クリップ部４２と前記玉部４４のそれぞれは、一部材により一体に形成されるかまたは二分材の組立により形成される。 The operation unit 4 includes a base 41 that protrudes radially outward from a slide hole 22 that extends in the axial direction of the side wall of the shaft tube 2, a clip unit 42 that is provided in front of the base 41, A shaft portion 43 that is provided continuously from the base portion 41 and is accommodated in the shaft cylinder 2 so as to be movable in the axial direction. The clip portion 42 can hold clothes such as pockets. The operation unit 4 is obtained from a molded body of synthetic resin (for example, polycarbonate resin). A ball portion 44 projects from the back surface (inner surface) of the clip portion 42. Each of the base part 41 and the clip part 42, the base part 41 and the shaft part 43, the clip part 42 and the ball part 44 are integrally formed by one member or formed by assembling a bisection material.

前記操作部４の基部４１が前記スライド孔２２に沿って軸方向に移動可能である。前記操作部４を前方に押圧操作することによって、筆記体３のペン先３１が軸筒２の前端孔２１から出没自在に構成される。 A base 41 of the operation unit 4 is movable in the axial direction along the slide hole 22. By pressing the operation unit 4 forward, the pen tip 31 of the writing body 3 is configured to be able to protrude and retract from the front end hole 21 of the shaft tube 2.

・ロック装置
前記ロック装置は、操作部４に取り付けられたロック部材８と、該ロック部材８と係脱自在の、軸筒２外面に設けた係合部９とからなる。前記係合部９は、径方向外方に突出する凸部からなる。前記ロック部材８は、コ字状の線状体からなり、その一端が操作部４に回動自在に取り付けられ、その他端が係合部９に係脱自在となる。前記係合部９は、摩擦部７より前方の軸筒２外面に突設される。 Lock device The lock device includes a lock member 8 attached to the operation portion 4 and an engagement portion 9 provided on the outer surface of the shaft tube 2 that is detachable from the lock member 8. The engaging portion 9 is composed of a convex portion protruding outward in the radial direction. The lock member 8 is formed of a U-shaped linear body, and one end of the lock member 8 is rotatably attached to the operation unit 4, and the other end is detachable from the engagement unit 9. The engaging portion 9 is provided on the outer surface of the shaft cylinder 2 in front of the friction portion 7.

前記ロック装置のロック部材８が軸筒２の係合部９と係合状態にあるとき、前記操作部４の前方移動が阻止され、一方、前記ロック装置のロック部材８と軸筒２の係合部９との係合が解除された状態にあるとき、前記操作部４の前方移動が可能となる。 When the locking member 8 of the locking device is in the engaged state with the engaging portion 9 of the shaft cylinder 2, the forward movement of the operation portion 4 is prevented, while the locking member 8 of the locking device and the shaft cylinder 2 are engaged. When the engagement with the joint portion 9 is released, the operation portion 4 can be moved forward.

・ペン先の出没
ペン先没入状態から操作部４を前方に、弾発体６による後方付勢に抗してスライド操作すると、操作部４の軸部４３のカム歯によって回転部材５が前方に押圧され、前記回転部材５の突条がカム溝に沿って前方に移動するに伴って、前記回転部材５が筆記体３の後端を前方に押圧し、ペン先３１が前端孔２１より外部に突出される。このとき、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それにより、前記回転部材５の突条がカム部のカム歯に係合され、ペン先突出状態が維持される。 -When the operation unit 4 is slid forward from the pen tip immersion state against the rear urging force of the projectile 6, the rotating member 5 is moved forward by the cam teeth of the shaft portion 43 of the operation unit 4. As the ridge of the rotating member 5 moves forward along the cam groove, the rotating member 5 presses the rear end of the writing body 3 forward, and the pen tip 31 is external to the front end hole 21. Protruding. At this time, the rotating member 5 rotates by a certain angle with respect to the cam portion by the contact between the cam teeth of the shaft portion 43 and the protrusion of the rotating member 5. Thereby, the protrusion of the rotating member 5 is engaged with the cam teeth of the cam portion, and the pen tip protruding state is maintained.

ペン先突出状態から操作部４を前方にスライド操作すると、操作部４の軸部４３が回転部材５を前方に押圧し、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それによって、前記突条とカム部のカム歯との係合状態が解除され、弾発体６による後方付勢により、前記突条がカム部のカム溝に沿って後方に移動する。前記回転部材５が後方に移動することに伴って、筆記体３が後方に移動し、ペン先没入状態となる。 When the operation portion 4 is slid forward from the pen tip protruding state, the shaft portion 43 of the operation portion 4 presses the rotating member 5 forward, and the cam teeth of the shaft portion 43 and the protrusions of the rotating member 5 contact each other. As a result of the contact, the rotating member 5 rotates by a certain angle with respect to the cam portion. As a result, the engagement state between the ridge and the cam teeth of the cam portion is released, and the ridge moves rearward along the cam groove of the cam portion due to the rear urging by the elastic body 6. As the rotary member 5 moves rearward, the writing body 3 moves rearward and enters the pen tip immersion state.

・摩擦部
本実施の形態において、前記摩擦部７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−ブタジエン−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７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）からなるものよりも、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からなることが好ましい。また、前記摩擦部７は、軸筒２の後端部外面に少なくとも設ければよく、例えば、軸筒２の後端部外面もしくは後軸２ｃの後端部外面に弾性材料よりなる摩擦部７を圧入、係合、螺合、嵌合、接着、２色成形等によって固着する構成、または軸筒２の全体もしくは後軸２ｃの全体が弾性材料により一体に形成される構成が挙げられる。 Friction part In the present embodiment, the elastic material constituting the friction part 7 is preferably a synthetic resin (rubber, elastomer) having elasticity, for example, a silicone resin, an SBS resin (styrene-butadiene-styrene copolymer). SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM), and the like. The synthetic resin having elasticity that constitutes the friction part 7 is a low-abrasion elastic material that hardly generates wear debris (rubbing debris) during friction, rather than a high-abrasion elastic material (for example, an eraser). Preferably it consists of. The friction portion 7 may be provided at least on the outer surface of the rear end portion of the shaft tube 2, for example, the friction portion 7 made of an elastic material on the outer surface of the rear end portion of the shaft tube 2 or the outer surface of the rear end portion of the rear shaft 2c. Can be fixed by press-fitting, engaging, screwing, fitting, bonding, two-color molding, or the like, or the entire shaft cylinder 2 or the entire rear shaft 2c can be integrally formed of an elastic material.

・熱変色性インキ
本実施の形態において、前記熱変色性インキ３３は、可逆熱変色性インキが好ましい。前記可逆熱変色性インキは、発色状態から加熱により消色する加熱消色型、発色状態または消色状態を互変的に特定温度域で記憶保持する色彩記憶保持型、または、消色状態から加熱により発色し、発色状態からの冷却により消色状態に復する加熱発色型等、種々のタイプを単独または併用して構成することができる。 -Thermochromic ink In the present embodiment, the thermochromic ink 33 is preferably a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

また、前記可逆熱変色性インキに含有される色材は、従来より公知の（イ）電子供与性呈色性有機化合物、（ロ）電子受容性化合物、及び（ハ）前記両者の呈色反応の生起温度を決める反応媒体、の必須三成分を少なくとも含む可逆熱変色性組成物をマイクロカプセル中に内包させた可逆熱変色性顔料が好適に用いられる。 The coloring material contained in the reversible thermochromic ink includes conventionally known (a) electron donating color-forming organic compounds, (b) electron-accepting compounds, and (c) color reactions of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least the essential three components of a reaction medium for determining the occurrence temperature of the polymer is encapsulated in a microcapsule is preferably used.

本実施の形態では、図１８に示すように、温度変化による着色濃度の変化をプロットした曲線の形状が、温度を変色温度域より低温側から上昇させていく場合と逆に変色温度域より高温側から下降させていく場合とで異なる経路を辿って変色し、完全発色温度（ｔ１）以下の低温域での発色状態、または完全消色温度（ｔ４）以上の高温域での消色状態が、特定温度域〔ｔ２〜ｔ３の間の温度域（実質的二相保持温度域）〕で記憶保持できる色彩記憶保持型熱変色性インキが適用されることが好ましい。図１８において、ΔＨは、ヒステリシスの程度を示す温度幅（即ちヒステリシス幅）を示す。ΔＨの値が小さいと、変色前後の両状態のうち一方の状態しか存在しえない。ΔＨの値が大きいと、変色前後の各状態の保持が容易となる。 In the present embodiment, as shown in FIG. 18, the shape of the curve plotting the change in the color density due to the temperature change is higher than the color change temperature range, contrary to the case where the temperature is raised from the lower temperature side than the color change temperature range. The color changes by following a different route from the case of descending from the side, and the color develops in a low temperature region below the complete color development temperature (t 1 ), or the color erases in a high temperature region above the complete color erase temperature (t 4 ). It is preferable to apply a color memory holding type thermochromic ink whose state can be stored and held in a specific temperature range [temperature range between t 2 and t 3 (substantially two-phase holding temperature range)]. In FIG. 18, ΔH indicates a temperature width (ie, hysteresis width) indicating the degree of hysteresis. When the value of ΔH is small, only one of the two states before and after the color change can exist. When the value of ΔH is large, it is easy to maintain each state before and after the color change.

本実施の形態では、前記熱変色性インキの摩擦部７の摩擦熱による変色温度は、２５℃〜９５℃（好ましくは３６℃〜９５℃）に設定される。即ち、本実施の形態では、前記高温側変色点〔完全消色温度（ｔ４）〕を、２５℃〜９５℃（好ましくは、３６℃〜９０℃）の範囲に設定し、前記低温側変色点〔完全発色温度（ｔ１）〕を、−３０℃〜＋２０℃（好ましくは、−３０℃〜＋１０℃）の範囲に設定することが有効である。それにより、常態（日常の生活温度域）で呈する色彩の保持を有効に機能させることができるとともに、可逆熱変色性インキによる筆跡を摩擦部７による摩擦熱で容易に変色することができる。 In the present embodiment, the color change temperature due to frictional heat of the friction portion 7 of the thermochromic ink is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in this embodiment, the high temperature side discoloration point [complete decoloration temperature (t 4 )] is set in a range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration is performed. It is effective to set the point [complete color development temperature (t 1 )] within a range of −30 ° C. to + 20 ° C. (preferably −30 ° C. to + 10 ° C.). Accordingly, it is possible to effectively maintain the color exhibited in the normal state (daily life temperature range), and the handwriting by the reversible thermochromic ink can be easily changed in color by the frictional heat generated by the friction portion 7.

本実施の形態の熱変色性筆記具１は、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置を、前記摩擦部より前方の軸筒２外面に設けたことにより、携帯時や摩擦操作時、ロック装置をロック状態にすることによって、操作部４を誤って前方に押圧操作することを回避でき、しかも、ロック状態のロック装置が摩擦操作性を阻害することなく、円滑な摩擦操作が可能となる。 The thermochromic writing instrument 1 according to the present embodiment is portable by providing a lock device on the outer surface of the shaft cylinder 2 in front of the friction part so as to prevent the operation part 4 from moving forward in the pen tip immersion state. By setting the lock device to the locked state at the time or during the friction operation, it is possible to avoid accidentally pressing the operation unit 4 forward, and the locked device in the locked state can be smoothly operated without impairing the friction operability. Frictional operation is possible.

本実施の形態の熱変色性筆記具１は、前記ロック装置が、一方が前記操作部４に接続され且つ他方が軸筒２の外面の係合部９に係脱自在に構成されるロック部材８を備えることにより、部品点数の少ない簡易なロック装置を得る。 In the thermochromic writing instrument 1 according to the present embodiment, the lock device is configured such that one of the lock devices is connected to the operation portion 4 and the other is detachably engageable with the engagement portion 9 on the outer surface of the shaft tube 2. By providing the above, a simple locking device with a small number of parts is obtained.

＜第２の実施の形態＞
図６及び図１０に本発明の第２の実施の形態を示す。
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、軸筒２の側壁より径方向外方に突出された操作部４と、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置と、軸筒２の後端部外面に設けた摩擦部とを備える。 <Second Embodiment>
6 and 10 show a second embodiment of the present invention.
The thermochromic writing instrument 1 of the present embodiment includes a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a pen tip 31 of the writing body 3 that can be projected and retracted from a front end hole 21 of the shaft tube 2. An operation mechanism 4 that protrudes radially outward from the side wall of the shaft cylinder 2, a lock device that prevents the operation section 4 from moving forward in the pen tip immersion state, And a friction part provided on the outer surface of the rear end part.

・筆記体
前記筆記体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３２内に充填される熱変色性インキ３３と、該熱変色性インキ３３の後端に充填され且つ該熱変色性インキ３３の消費に伴い前進する追従体３４（例えば高粘度流体）とからなる。 Writing body The writing body 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, and a thermochromic ink 33 filled in the ink storage tube 32. It comprises a follower 34 (for example, a high-viscosity fluid) that fills the rear end of the thermochromic ink 33 and moves forward as the thermochromic ink 33 is consumed.

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チップのみからなる構成、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が取り付けられる。前記ペン先３１の内部には、前端のボールを前方に押圧するスプリングが収容される。前記スプリングは、圧縮コイルスプリングの前端部にロッド部を備えた構成であり、前記ロッド部の前端がボール後面に接触している。非筆記時、前記スプリングの前方付勢によりボールがボールペンチップ前端の内向きの前端縁部内面に密接され、ペン先３１の前端からのインキの漏出及びインキの蒸発を防止できる。 For example, the pen tip 31 includes only a metal ball-point pen tip that holds a ball rotatably at the front end, or a configuration that includes a pen tip holder made of a synthetic resin that holds a rear outer surface of the ball-point pen tip. It may be. Further, a tail plug having a vent hole through which the ink containing tube 32 and the outside can be vented is attached to the rear end opening of the ink containing tube 32. A spring that presses the ball at the front end forward is housed inside the nib 31. The spring includes a rod portion at a front end portion of a compression coil spring, and the front end of the rod portion is in contact with the rear surface of the ball. When not writing, the ball is brought into close contact with the inner surface of the front end edge portion of the front end of the ballpoint pen tip by the forward urging of the spring, thereby preventing ink leakage and ink evaporation from the front end of the pen tip 31.

・軸筒２
前記軸筒２は、先細円筒状の前軸２ａと、該前軸２ａの後端部に連結される円筒状の中間軸２ｂと、該中間軸２ｂの後端部に連結される円筒状の後軸２ｃとからなる。前記軸筒２側壁（例えば中間軸２ｂの側壁及び後軸２ｃの側壁）には、軸方向に延びるスライド孔２２が形成される。前記軸筒２の後端（即ち後軸２ｃの後端）には、取付孔２３が軸方向に貫設される。前記取付孔２３に弾性材料からなる摩擦部７が圧入嵌合される。前記摩擦部７は、前記操作部４の軸方向の移動に連動せず、後軸２ｃ（軸筒２）の後端外面に固定される。前記摩擦部７は、操作部４と独立して設けられる。 ・ Shaft 2
The shaft cylinder 2 includes a tapered cylindrical front shaft 2a, a cylindrical intermediate shaft 2b connected to the rear end portion of the front shaft 2a, and a cylindrical shape connected to the rear end portion of the intermediate shaft 2b. It consists of a rear shaft 2c. A slide hole 22 extending in the axial direction is formed in the side wall of the shaft cylinder 2 (for example, the side wall of the intermediate shaft 2b and the side wall of the rear shaft 2c). A mounting hole 23 is provided in the axial direction at the rear end of the shaft cylinder 2 (that is, the rear end of the rear shaft 2c). The friction part 7 made of an elastic material is press-fitted into the mounting hole 23. The friction portion 7 is fixed to the outer surface of the rear end of the rear shaft 2c (shaft cylinder 2) without interlocking with the movement of the operation portion 4 in the axial direction. The friction part 7 is provided independently of the operation part 4.

・出没機構
前記出没機構は、回転カム機構を用いたサイドスライド式出没機構である。前記出没機構は、中間軸２ｂ内面に形成されたカム部と、該カム部に係合し且つ筆記体３の後端に当接する回転部材５と、該回転部材５に係合し且つスライド孔２２より径方向外方に突出する操作部４と、軸筒２内に収容され且つ筆記体３を後方に付勢する弾発体６（例えば圧縮コイルスプリング）とからなる。本実施の形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもが操作部４を前方にスライド操作するダブルノック式である。前記回転部材５は合成樹脂（例えばポリアセタール樹脂）の成形体により得られる。 -Intrusion mechanism The intrusion mechanism is a side slide type intrusion mechanism using a rotating cam mechanism. The retracting mechanism includes a cam portion formed on the inner surface of the intermediate shaft 2b, a rotating member 5 that engages with the cam portion and contacts the rear end of the writing body 3, and engages with the rotating member 5 and slide holes. The operation part 4 protrudes radially outward from 22 and the elastic body 6 (for example, compression coil spring) accommodated in the shaft cylinder 2 and biases the writing body 3 backward. The retracting mechanism of the present embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation slide the operation unit 4 forward. The rotating member 5 is obtained from a molded body of synthetic resin (for example, polyacetal resin).

前記カム部は、前方に突出する鋸歯状の複数のカム歯と、該カム歯間に形成される、軸方向に延びる複数のカム溝とを備える。前記回転部材５は、その外面に軸方向に延びる複数本（例えば４本）の突条を備え、該突条が、カム部のカム歯及びカム部のカム溝と係合される。前記操作部４の軸部４３の前端には、回転部材５の突条の後端と係合するカム歯が一体または別部材の取り付けにより形成される。 The cam portion includes a plurality of serrated cam teeth protruding forward and a plurality of cam grooves extending between the cam teeth and extending in the axial direction. The rotating member 5 includes a plurality of (for example, four) protrusions extending in the axial direction on the outer surface thereof, and the protrusions are engaged with cam teeth of the cam portion and cam grooves of the cam portion. At the front end of the shaft portion 43 of the operation portion 4, cam teeth that engage with the rear end of the protrusion of the rotating member 5 are formed integrally or by attaching another member.

・操作部
前記操作部４は、軸筒２側壁の軸方向に延びるスライド孔２２より径方向外方に突出される基部４１と、該基部４１より前方に連設されるクリップ部４２と、該基部４１より連設され且つ軸筒２内に軸方向に移動可能に収容される軸部４３と、を備える。前記クリップ部４２は、ポケット等の衣服を挟持可能である。前記操作部４は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体により得られる。前記クリップ部４２の裏面（内面）に玉部４４が突設される。前記基部４１と前記クリップ部４２、前記基部４１と前記軸部４３、前記クリップ部４２と前記玉部４４のそれぞれは、一部材により一体に形成されるかまたは二分材の組立により形成される。 The operation unit 4 includes a base 41 that protrudes radially outward from a slide hole 22 that extends in the axial direction of the side wall of the shaft tube 2, a clip unit 42 that is provided in front of the base 41, A shaft portion 43 that is provided continuously from the base portion 41 and is accommodated in the shaft cylinder 2 so as to be movable in the axial direction. The clip portion 42 can hold clothes such as pockets. The operation unit 4 is obtained from a molded body of synthetic resin (for example, polycarbonate resin). A ball portion 44 projects from the back surface (inner surface) of the clip portion 42. Each of the base part 41 and the clip part 42, the base part 41 and the shaft part 43, the clip part 42 and the ball part 44 are integrally formed by one member or formed by assembling a bisection material.

前記操作部４の基部４１が前記スライド孔２２に沿って軸方向に移動可能である。前記操作部４を前方に押圧操作することによって、筆記体３のペン先３１が軸筒２の前端孔２１から出没自在に構成される。 A base 41 of the operation unit 4 is movable in the axial direction along the slide hole 22. By pressing the operation unit 4 forward, the pen tip 31 of the writing body 3 is configured to be able to protrude and retract from the front end hole 21 of the shaft tube 2.

・ロック装置
前記ロック装置は、摩擦部７前方の軸筒２外面に取り付けられたロック部材８と、該ロック部材８と係脱自在の、操作部４外面に設けた係合部９とからなる。前記係合部９は、径方向外方に突出する凸部からなる。前記ロック部材８は、コ字状の線状体からなり、その一端が軸筒２外面に回動自在に取り付けられ、その他端が操作部４の係合部９に係脱自在となる。
前記係合部９は、操作部４の後端部に形成される。 Lock device The lock device includes a lock member 8 attached to the outer surface of the shaft cylinder 2 in front of the friction portion 7, and an engagement portion 9 provided on the outer surface of the operation portion 4, which is detachable from the lock member 8. . The engaging portion 9 is composed of a convex portion protruding outward in the radial direction. The lock member 8 is formed of a U-shaped linear body, one end of which is rotatably attached to the outer surface of the shaft tube 2, and the other end is freely engageable with and disengageable from the engaging portion 9 of the operation unit 4.
The engaging portion 9 is formed at the rear end portion of the operation portion 4.

前記ロック装置のロック部材８が操作部４の係合部９と係合状態にあるとき、前記操作部４の前方移動が阻止され、一方、前記ロック装置のロック部材８と操作部４の係合部９との係合が解除された状態にあるとき、前記操作部４の前方移動が可能となる。 When the locking member 8 of the locking device is in the engaged state with the engaging portion 9 of the operating portion 4, the forward movement of the operating portion 4 is prevented, while the locking member 8 of the locking device and the operating portion 4 are engaged. When the engagement with the joint portion 9 is released, the operation portion 4 can be moved forward.

・ペン先の出没
ペン先没入状態から操作部４を前方に、弾発体６による後方付勢に抗してスライド操作すると、操作部４の軸部４３のカム歯によって回転部材５が前方に押圧され、前記回転部材５の突条がカム溝に沿って前方に移動するに伴って、前記回転部材５が筆記体３の後端を前方に押圧し、ペン先３１が前端孔２１より外部に突出される。このとき、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それにより、前記回転部材５の突条がカム部のカム歯に係合され、ペン先突出状態が維持される。 -When the operation unit 4 is slid forward from the pen tip immersion state against the rear urging force of the projectile 6, the rotating member 5 is moved forward by the cam teeth of the shaft portion 43 of the operation unit 4. As the ridge of the rotating member 5 moves forward along the cam groove, the rotating member 5 presses the rear end of the writing body 3 forward, and the pen tip 31 is external to the front end hole 21. Protruding. At this time, the rotating member 5 rotates by a certain angle with respect to the cam portion by the contact between the cam teeth of the shaft portion 43 and the protrusion of the rotating member 5. Thereby, the protrusion of the rotating member 5 is engaged with the cam teeth of the cam portion, and the pen tip protruding state is maintained.

ペン先突出状態から操作部４を前方にスライド操作すると、操作部４の軸部４３が回転部材５を前方に押圧し、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それによって、前記突条とカム部のカム歯との係合状態が解除され、弾発体６による後方付勢により、前記突条がカム部のカム溝に沿って後方に移動する。前記回転部材５が後方に移動することに伴って、筆記体３が後方に移動し、ペン先没入状態となる。 When the operation portion 4 is slid forward from the pen tip protruding state, the shaft portion 43 of the operation portion 4 presses the rotating member 5 forward, and the cam teeth of the shaft portion 43 and the protrusions of the rotating member 5 contact each other. As a result of the contact, the rotating member 5 rotates by a certain angle with respect to the cam portion. As a result, the engagement state between the ridge and the cam teeth of the cam portion is released, and the ridge moves rearward along the cam groove of the cam portion due to the rear urging by the elastic body 6. As the rotary member 5 moves rearward, the writing body 3 moves rearward and enters the pen tip immersion state.

・摩擦部
本実施の形態において、前記摩擦部７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−ブタジエン−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７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）からなるものよりも、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からなることが好ましい。また、前記摩擦部７は、軸筒２の後端部外面に少なくとも設ければよく、例えば、軸筒２の後端部外面もしくは後軸２ｃの後端部外面に弾性材料よりなる摩擦部７を圧入、係合、螺合、嵌合、接着、２色成形等によって固着する構成、または軸筒２２の全体もしくは後軸２ｃの全体が弾性材料により一体に形成される構成が挙げられる。 Friction part In the present embodiment, the elastic material constituting the friction part 7 is preferably a synthetic resin (rubber, elastomer) having elasticity, for example, a silicone resin, an SBS resin (styrene-butadiene-styrene copolymer). SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM), and the like. The synthetic resin having elasticity that constitutes the friction part 7 is a low-abrasion elastic material that hardly generates wear debris (rubbing debris) during friction, rather than a high-abrasion elastic material (for example, an eraser). Preferably it consists of. The friction portion 7 may be provided at least on the outer surface of the rear end portion of the shaft tube 2, for example, the friction portion 7 made of an elastic material on the outer surface of the rear end portion of the shaft tube 2 or the outer surface of the rear end portion of the rear shaft 2c. Are fixed by press-fitting, engagement, screwing, fitting, adhesion, two-color molding, or the like, or a configuration in which the entire shaft cylinder 22 or the entire rear shaft 2c is integrally formed of an elastic material.

・熱変色性インキ
本実施の形態において、前記熱変色性インキ３３は、可逆熱変色性インキが好ましい。前記可逆熱変色性インキは、発色状態から加熱により消色する加熱消色型、発色状態または消色状態を互変的に特定温度域で記憶保持する色彩記憶保持型、または、消色状態から加熱により発色し、発色状態からの冷却により消色状態に復する加熱発色型等、種々のタイプを単独または併用して構成することができる。 -Thermochromic ink In the present embodiment, the thermochromic ink 33 is preferably a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

また、前記可逆熱変色性インキに含有される色材は、従来より公知の（イ）電子供与性呈色性有機化合物、（ロ）電子受容性化合物、及び（ハ）前記両者の呈色反応の生起温度を決める反応媒体、の必須三成分を少なくとも含む可逆熱変色性組成物をマイクロカプセル中に内包させた可逆熱変色性顔料が好適に用いられる。 The coloring material contained in the reversible thermochromic ink includes conventionally known (a) electron donating color-forming organic compounds, (b) electron-accepting compounds, and (c) color reactions of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least the essential three components of a reaction medium for determining the occurrence temperature of the polymer is encapsulated in a microcapsule is preferably used.

本実施の形態では、図１８に示すように、温度変化による着色濃度の変化をプロットした曲線の形状が、温度を変色温度域より低温側から上昇させていく場合と逆に変色温度域より高温側から下降させていく場合とで異なる経路を辿って変色し、完全発色温度（ｔ１）以下の低温域での発色状態、または完全消色温度（ｔ４）以上の高温域での消色状態が、特定温度域〔ｔ２〜ｔ３の間の温度域（実質的二相保持温度域）〕で記憶保持できる色彩記憶保持型熱変色性インキが適用されることが好ましい。図１８において、ΔＨは、ヒステリシスの程度を示す温度幅（即ちヒステリシス幅）を示す。ΔＨの値が小さいと、変色前後の両状態のうち一方の状態しか存在しえない。ΔＨの値が大きいと、変色前後の各状態の保持が容易となる。 In the present embodiment, as shown in FIG. 18, the shape of the curve plotting the change in the color density due to the temperature change is higher than the color change temperature range, contrary to the case where the temperature is raised from the lower temperature side than the color change temperature range. The color changes by following a different route from the case of descending from the side, and the color develops in a low temperature region below the complete color development temperature (t 1 ), or the color erases in a high temperature region above the complete color erase temperature (t 4 ). It is preferable to apply a color memory holding type thermochromic ink whose state can be stored and held in a specific temperature range [temperature range between t 2 and t 3 (substantially two-phase holding temperature range)]. In FIG. 18, ΔH indicates a temperature width (ie, hysteresis width) indicating the degree of hysteresis. When the value of ΔH is small, only one of the two states before and after the color change can exist. When the value of ΔH is large, it is easy to maintain each state before and after the color change.

本実施の形態では、前記熱変色性インキの摩擦部７の摩擦熱による変色温度は、２５℃〜９５℃（好ましくは３６℃〜９５℃）に設定される。即ち、本実施の形態では、前記高温側変色点〔完全消色温度（ｔ４）〕を、２５℃〜９５℃（好ましくは、３６℃〜９０℃）の範囲に設定し、前記低温側変色点〔完全発色温度（ｔ１）〕を、−３０℃〜＋２０℃（好ましくは、−３０℃〜＋１０℃）の範囲に設定することが有効である。それにより、常態（日常の生活温度域）で呈する色彩の保持を有効に機能させることができるとともに、可逆熱変色性インキによる筆跡を摩擦部７による摩擦熱で容易に変色することができる。 In the present embodiment, the color change temperature due to frictional heat of the friction portion 7 of the thermochromic ink is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in this embodiment, the high temperature side discoloration point [complete decoloration temperature (t 4 )] is set in a range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration is performed. It is effective to set the point [complete color development temperature (t 1 )] within a range of −30 ° C. to + 20 ° C. (preferably −30 ° C. to + 10 ° C.). Accordingly, it is possible to effectively maintain the color exhibited in the normal state (daily life temperature range), and the handwriting by the reversible thermochromic ink can be easily changed in color by the frictional heat generated by the friction portion 7.

本実施の形態の熱変色性筆記具１は、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置を、前記摩擦部７より前方の軸筒２外面に設けたことにより、携帯時や摩擦操作時、ロック装置をロック状態にすることによって、操作部４を誤って前方に押圧操作することを回避でき、しかも、ロック状態のロック装置が摩擦操作性を阻害することなく、円滑な摩擦操作が可能となる。 The thermochromic writing instrument 1 of the present embodiment is provided with a locking device that prevents the operation unit 4 from moving forward in the pen tip immersion state on the outer surface of the shaft cylinder 2 in front of the friction unit 7. By locking the lock device when carrying or frictional operation, it is possible to avoid accidentally pressing the operation unit 4 forward, and the lock device in the locked state does not hinder the friction operability, Smooth friction operation is possible.

本実施の形態の熱変色性筆記具１は、前記ロック装置が、一方が前記軸筒２に接続され且つ他方が操作部４の係合部９に係脱自在に構成されるロック部材８を備えることにより、部品点数の少ない簡易なロック装置を得る。 In the thermochromic writing instrument 1 according to the present embodiment, the lock device includes a lock member 8 that is configured such that one is connected to the shaft tube 2 and the other is freely engageable with and disengageable from the engagement portion 9 of the operation portion 4. Thus, a simple locking device with a small number of parts is obtained.

＜第３の実施の形態＞
図１１及び図１５に本発明の第３の実施の形態を示す。
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、軸筒２の側壁より径方向外方に突出された操作部４と、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置と、軸筒２の後端部外面に設けた摩擦部７とを備える。 <Third Embodiment>
11 and 15 show a third embodiment of the present invention.
The thermochromic writing instrument 1 of the present embodiment includes a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a pen tip 31 of the writing body 3 that can be projected and retracted from a front end hole 21 of the shaft tube 2. An operation mechanism 4 that protrudes radially outward from the side wall of the shaft cylinder 2, a lock device that prevents the operation section 4 from moving forward in the pen tip immersion state, And a friction part 7 provided on the outer surface of the rear end part.

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、軸筒２の側壁より径方向外方に突出された操作部４と、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置と、軸筒２の後端部外面に設けた摩擦部７とを備える。 The thermochromic writing instrument 1 of the present embodiment includes a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a pen tip 31 of the writing body 3 that can be projected and retracted from a front end hole 21 of the shaft tube 2. An operation mechanism 4 that protrudes radially outward from the side wall of the shaft cylinder 2, a lock device that prevents the operation section 4 from moving forward in the pen tip immersion state, And a friction part 7 provided on the outer surface of the rear end part.

・筆記体
前記筆記体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３２内に充填される熱変色性インキ３３と、該熱変色性インキ３３の後端に充填され且つ該熱変色性インキ３３の消費に伴い前進する追従体３４（例えば高粘度流体）とからなる。 Writing body The writing body 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, and a thermochromic ink 33 filled in the ink storage tube 32. It comprises a follower 34 (for example, a high-viscosity fluid) that fills the rear end of the thermochromic ink 33 and moves forward as the thermochromic ink 33 is consumed.

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チップのみからなる構成、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が取り付けられる。前記ペン先３１の内部には、前端のボールを前方に押圧するスプリングが収容される。前記スプリングは、圧縮コイルスプリングの前端部にロッド部を備えた構成であり、前記ロッド部の前端がボール後面に接触している。非筆記時、前記スプリングの前方付勢によりボールがボールペンチップ前端の内向きの前端縁部内面に密接され、ペン先３１の前端からのインキの漏出及びインキの蒸発を防止できる。 For example, the pen tip 31 includes only a metal ball-point pen tip that holds a ball rotatably at the front end, or a configuration that includes a pen tip holder made of a synthetic resin that holds a rear outer surface of the ball-point pen tip. It may be. Further, a tail plug having a vent hole through which the ink containing tube 32 and the outside can be vented is attached to the rear end opening of the ink containing tube 32. A spring that presses the ball at the front end forward is housed inside the nib 31. The spring includes a rod portion at a front end portion of a compression coil spring, and the front end of the rod portion is in contact with the rear surface of the ball. When not writing, the ball is brought into close contact with the inner surface of the front end edge portion of the front end of the ballpoint pen tip by the forward urging of the spring, thereby preventing ink leakage and ink evaporation from the front end of the pen tip 31.

・軸筒
前記軸筒２は、先細円筒状の前軸２ａと、該前軸２ａの後端部に連結される円筒状の中間軸２ｂと、該中間軸２ｂの後端部に連結される円筒状の後軸２ｃとからなる。前記軸筒２側壁（例えば中間軸２ｂの側壁及び後軸２ｃの側壁）には、軸方向に延びるスライド孔２２が形成される。前記軸筒２の後端（即ち後軸２ｃの後端）には、取付孔２３が軸方向に貫設される。前記取付孔２３に弾性材料からなる摩擦部７が圧入嵌合される。前記摩擦部７は、前記操作部４の軸方向の移動に連動せず、後軸２ｃ（軸筒２）の後端外面に固定される。前記摩擦部７は、操作部４と独立して設けられる。 The shaft cylinder 2 is connected to the tapered cylindrical front shaft 2a, the cylindrical intermediate shaft 2b connected to the rear end portion of the front shaft 2a, and the rear end portion of the intermediate shaft 2b. It consists of a cylindrical rear shaft 2c. A slide hole 22 extending in the axial direction is formed in the side wall of the shaft cylinder 2 (for example, the side wall of the intermediate shaft 2b and the side wall of the rear shaft 2c). A mounting hole 23 is provided in the axial direction at the rear end of the shaft cylinder 2 (that is, the rear end of the rear shaft 2c). The friction part 7 made of an elastic material is press-fitted into the mounting hole 23. The friction portion 7 is fixed to the outer surface of the rear end of the rear shaft 2c (shaft cylinder 2) without interlocking with the movement of the operation portion 4 in the axial direction. The friction part 7 is provided independently of the operation part 4.

・出没機構
前記出没機構は、回転カム機構を用いたサイドスライド式出没機構である。前記出没機構は、中間軸２ｂ内面に形成されたカム部と、該カム部に係合し且つ筆記体３の後端に当接する回転部材５と、該回転部材５に係合し且つスライド孔２２より径方向外方に突出する操作部４と、軸筒２内に収容され且つ筆記体３を後方に付勢する弾発体６（例えば圧縮コイルスプリング）とからなる。本実施の形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもが操作部４を前方にスライド操作するダブルノック式である。前記回転部材５は合成樹脂（例えばポリアセタール樹脂）の成形体により得られる。 -Intrusion mechanism The intrusion mechanism is a side slide type intrusion mechanism using a rotating cam mechanism. The retracting mechanism includes a cam portion formed on the inner surface of the intermediate shaft 2b, a rotating member 5 that engages with the cam portion and contacts the rear end of the writing body 3, and engages with the rotating member 5 and slide holes. The operation part 4 protrudes radially outward from 22 and the elastic body 6 (for example, compression coil spring) accommodated in the shaft cylinder 2 and biases the writing body 3 backward. The retracting mechanism of the present embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation slide the operation unit 4 forward. The rotating member 5 is obtained from a molded body of synthetic resin (for example, polyacetal resin).

前記カム部は、前方に突出する鋸歯状の複数のカム歯と、該カム歯間に形成される、軸方向に延びる複数のカム溝とを備える。前記回転部材５は、その外面に軸方向に延びる複数本（例えば４本）の突条を備え、該突条が、カム部のカム歯及びカム部のカム溝と係合される。前記操作部４の軸部４３の前端には、回転部材５の突条の後端と係合するカム歯が一体または別部材の取り付けにより形成される。 The cam portion includes a plurality of serrated cam teeth protruding forward and a plurality of cam grooves extending between the cam teeth and extending in the axial direction. The rotating member 5 includes a plurality of (for example, four) protrusions extending in the axial direction on the outer surface thereof, and the protrusions are engaged with cam teeth of the cam portion and cam grooves of the cam portion. At the front end of the shaft portion 43 of the operation portion 4, cam teeth that engage with the rear end of the protrusion of the rotating member 5 are formed integrally or by attaching another member.

・操作部
前記操作部４は、軸筒２側壁の軸方向に延びるスライド孔２２より径方向外方に突出される基部４１と、該基部４１より前方に連設されるクリップ部４２と、該基部４１より連設され且つ軸筒２内に軸方向に移動可能に収容される軸部４３と、を備える。前記クリップ部４２は、ポケット等の衣服を挟持可能である。前記操作部４は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体により得られる。前記クリップ部４２の裏面（内面）に玉部４４が突設される。前記基部４１と前記クリップ部４２、前記基部４１と前記軸部４３、前記クリップ部４２と前記玉部４４のそれぞれは、一部材により一体に形成されるかまたは二分材の組立により形成される。 The operation unit 4 includes a base 41 that protrudes radially outward from a slide hole 22 that extends in the axial direction of the side wall of the shaft tube 2, a clip unit 42 that is provided in front of the base 41, A shaft portion 43 that is provided continuously from the base portion 41 and is accommodated in the shaft cylinder 2 so as to be movable in the axial direction. The clip portion 42 can hold clothes such as pockets. The operation unit 4 is obtained from a molded body of synthetic resin (for example, polycarbonate resin). A ball portion 44 projects from the back surface (inner surface) of the clip portion 42. Each of the base part 41 and the clip part 42, the base part 41 and the shaft part 43, the clip part 42 and the ball part 44 are integrally formed by one member or formed by assembling a bisection material.

前記操作部４の基部４１が前記スライド孔２２に沿って軸方向に移動可能である。前記操作部４を前方に押圧操作することによって、筆記体３のペン先３１が軸筒２の前端孔２１から出没自在に構成される。 A base 41 of the operation unit 4 is movable in the axial direction along the slide hole 22. By pressing the operation unit 4 forward, the pen tip 31 of the writing body 3 is configured to be able to protrude and retract from the front end hole 21 of the shaft tube 2.

・ロック装置
前記ロック装置が、軸筒２の外面に周方向に回転可能且つ軸方向移動不能に取り付けられる、切り欠き部８１を有する横断面Ｃ字状のロック部材８からなる。前記ロック部材８の切り欠き部８１以外の部分を前記操作部４よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の前方への移動が阻止され、一方、前記ロック部材８の切り欠き部８１を前記操作部４よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の前方への移動が可能となる。 Locking device The locking device comprises a locking member 8 having a C-shaped cross section having a notch 81 that is attached to the outer surface of the shaft tube 2 so as to be rotatable in the circumferential direction and immovable in the axial direction. When the portion other than the notch portion 81 of the lock member 8 is positioned on the slide hole 22 in front of the operation portion 4, the operation portion 4 is prevented from moving forward, When the cutout portion 81 of the lock member 8 is positioned on the slide hole 22 in front of the operation portion 4, the operation portion 4 can be moved forward.

・ペン先の出没
ペン先没入状態から操作部４を前方に、弾発体６による後方付勢に抗してスライド操作すると、操作部４の軸部４３のカム歯によって回転部材５が前方に押圧され、前記回転部材５の突条がカム溝に沿って前方に移動するに伴って、前記回転部材５が筆記体３の後端を前方に押圧し、ペン先３１が前端孔２１より外部に突出される。このとき、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それにより、前記回転部材５の突条がカム部のカム歯に係合され、ペン先突出状態が維持される。 -When the operation unit 4 is slid forward from the pen tip immersion state against the rear urging force of the projectile 6, the rotating member 5 is moved forward by the cam teeth of the shaft portion 43 of the operation unit 4. As the ridge of the rotating member 5 moves forward along the cam groove, the rotating member 5 presses the rear end of the writing body 3 forward, and the pen tip 31 is external to the front end hole 21. Protruding. At this time, the rotating member 5 rotates by a certain angle with respect to the cam portion by the contact between the cam teeth of the shaft portion 43 and the protrusion of the rotating member 5. Thereby, the protrusion of the rotating member 5 is engaged with the cam teeth of the cam portion, and the pen tip protruding state is maintained.

ペン先突出状態から操作部４を前方にスライド操作すると、操作部４の軸部４３が回転部材５を前方に押圧し、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それによって、前記突条とカム部のカム歯との係合状態が解除され、弾発体６による後方付勢により、前記突条がカム部のカム溝に沿って後方に移動する。前記回転部材５が後方に移動することに伴って、筆記体３が後方に移動し、ペン先没入状態となる。 When the operation portion 4 is slid forward from the pen tip protruding state, the shaft portion 43 of the operation portion 4 presses the rotating member 5 forward, and the cam teeth of the shaft portion 43 and the protrusions of the rotating member 5 contact each other. As a result of the contact, the rotating member 5 rotates by a certain angle with respect to the cam portion. As a result, the engagement state between the ridge and the cam teeth of the cam portion is released, and the ridge moves rearward along the cam groove of the cam portion due to the rear urging by the elastic body 6. As the rotary member 5 moves rearward, the writing body 3 moves rearward and enters the pen tip immersion state.

・摩擦部
本実施の形態において、前記摩擦部７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−ブタジエン−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７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）からなるものよりも、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からなることが好ましい。また、前記摩擦部７は、軸筒２の後端部外面に少なくとも設ければよく、例えば、軸筒２の後端部外面もしくは後軸２ｃの後端部外面に弾性材料よりなる摩擦部７を圧入、係合、螺合、嵌合、接着、２色成形等によって固着する構成、または軸筒２２の全体もしくは後軸２ｃの全体が弾性材料により一体に形成される構成が挙げられる。 Friction part In the present embodiment, the elastic material constituting the friction part 7 is preferably a synthetic resin (rubber, elastomer) having elasticity, for example, a silicone resin, an SBS resin (styrene-butadiene-styrene copolymer). SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM), and the like. The synthetic resin having elasticity that constitutes the friction part 7 is a low-abrasion elastic material that hardly generates wear debris (rubbing debris) during friction, rather than a high-abrasion elastic material (for example, an eraser). Preferably it consists of. The friction portion 7 may be provided at least on the outer surface of the rear end portion of the shaft tube 2, for example, the friction portion 7 made of an elastic material on the outer surface of the rear end portion of the shaft tube 2 or the outer surface of the rear end portion of the rear shaft 2c. Are fixed by press-fitting, engagement, screwing, fitting, adhesion, two-color molding, or the like, or a configuration in which the entire shaft cylinder 22 or the entire rear shaft 2c is integrally formed of an elastic material.

・熱変色性インキ
本実施の形態において、前記熱変色性インキ３３は、可逆熱変色性インキが好ましい。前記可逆熱変色性インキは、発色状態から加熱により消色する加熱消色型、発色状態または消色状態を互変的に特定温度域で記憶保持する色彩記憶保持型、または、消色状態から加熱により発色し、発色状態からの冷却により消色状態に復する加熱発色型等、種々のタイプを単独または併用して構成することができる。 -Thermochromic ink In the present embodiment, the thermochromic ink 33 is preferably a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

また、前記可逆熱変色性インキに含有される色材は、従来より公知の（イ）電子供与性呈色性有機化合物、（ロ）電子受容性化合物、及び（ハ）前記両者の呈色反応の生起温度を決める反応媒体、の必須三成分を少なくとも含む可逆熱変色性組成物をマイクロカプセル中に内包させた可逆熱変色性顔料が好適に用いられる。 The coloring material contained in the reversible thermochromic ink includes conventionally known (a) electron donating color-forming organic compounds, (b) electron-accepting compounds, and (c) color reactions of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least the essential three components of a reaction medium for determining the occurrence temperature of the polymer is encapsulated in a microcapsule is preferably used.

本実施の形態では、図１８に示すように、温度変化による着色濃度の変化をプロットした曲線の形状が、温度を変色温度域より低温側から上昇させていく場合と逆に変色温度域より高温側から下降させていく場合とで異なる経路を辿って変色し、完全発色温度（ｔ１）以下の低温域での発色状態、または完全消色温度（ｔ４）以上の高温域での消色状態が、特定温度域〔ｔ２〜ｔ３の間の温度域（実質的二相保持温度域）〕で記憶保持できる色彩記憶保持型熱変色性インキが適用されることが好ましい。図１８において、ΔＨは、ヒステリシスの程度を示す温度幅（即ちヒステリシス幅）を示す。ΔＨの値が小さいと、変色前後の両状態のうち一方の状態しか存在しえない。ΔＨの値が大きいと、変色前後の各状態の保持が容易となる。 In the present embodiment, as shown in FIG. 18, the shape of the curve plotting the change in the color density due to the temperature change is higher than the color change temperature range, contrary to the case where the temperature is raised from the lower temperature side than the color change temperature range. The color changes by following a different route from the case of descending from the side, and the color develops in a low temperature region below the complete color development temperature (t 1 ), or the color erases in a high temperature region above the complete color erase temperature (t 4 ). It is preferable to apply a color memory holding type thermochromic ink whose state can be stored and held in a specific temperature range [temperature range between t 2 and t 3 (substantially two-phase holding temperature range)]. In FIG. 18, ΔH indicates a temperature width (ie, hysteresis width) indicating the degree of hysteresis. When the value of ΔH is small, only one of the two states before and after the color change can exist. When the value of ΔH is large, it is easy to maintain each state before and after the color change.

本実施の形態では、前記熱変色性インキの摩擦部７の摩擦熱による変色温度は、２５℃〜９５℃（好ましくは３６℃〜９５℃）に設定される。即ち、本実施の形態では、前記高温側変色点〔完全消色温度（ｔ４）〕を、２５℃〜９５℃（好ましくは、３６℃〜９０℃）の範囲に設定し、前記低温側変色点〔完全発色温度（ｔ１）〕を、−３０℃〜＋２０℃（好ましくは、−３０℃〜＋１０℃）の範囲に設定することが有効である。それにより、常態（日常の生活温度域）で呈する色彩の保持を有効に機能させることができるとともに、可逆熱変色性インキによる筆跡を摩擦部７による摩擦熱で容易に変色することができる。 In the present embodiment, the color change temperature due to frictional heat of the friction portion 7 of the thermochromic ink is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in this embodiment, the high temperature side discoloration point [complete decoloration temperature (t 4 )] is set in a range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration is performed. It is effective to set the point [complete color development temperature (t 1 )] within a range of −30 ° C. to + 20 ° C. (preferably −30 ° C. to + 10 ° C.). Accordingly, it is possible to effectively maintain the color exhibited in the normal state (daily life temperature range), and the handwriting by the reversible thermochromic ink can be easily changed in color by the frictional heat generated by the friction portion 7.

本実施の形態の熱変色性筆記具１は、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置を、前記摩擦部７より前方の軸筒２外面に設けたことにより、携帯時や摩擦操作時、ロック装置をロック状態にすることによって、操作部４を誤って前方に押圧操作することを回避でき、しかも、ロック状態のロック装置が摩擦操作性を阻害することなく、円滑な摩擦操作が可能となる。 The thermochromic writing instrument 1 of the present embodiment is provided with a locking device that prevents the operation unit 4 from moving forward in the pen tip immersion state on the outer surface of the shaft cylinder 2 in front of the friction unit 7. By locking the lock device when carrying or frictional operation, it is possible to avoid accidentally pressing the operation unit 4 forward, and the lock device in the locked state does not hinder the friction operability, Smooth friction operation is possible.

本実施の形態の熱変色性筆記具１は、前記ロック装置が、軸筒２の外面に周方向に回転可能且つ軸方向移動不能に取り付けられる、切り欠き部８１を有する横断面Ｃ字状のロック部材８を備え、前記ロック部材８の切り欠き部８１以外の部分を前記操作部４よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の前方への移動が阻止され、一方、前記ロック部材８の切り欠き部８１を前記操作部４よりも前方の前記スライド孔２２上に位置させた状態にあるとき、前記操作部４の前方への移動が可能となることにより、部品点数の少ない簡易なロック装置を得るとともに、ロック装置によってクリップの外観性が損なわれることがない。 The thermochromic writing instrument 1 of the present embodiment has a C-shaped cross-section lock having a notch 81 to which the locking device is attached to the outer surface of the shaft tube 2 in a circumferential direction and non-movable in the axial direction. When the member 8 is provided and a portion other than the notch 81 of the lock member 8 is positioned on the slide hole 22 in front of the operation unit 4, the operation unit 4 moves forward. On the other hand, when the cutout portion 81 of the lock member 8 is positioned on the slide hole 22 in front of the operation portion 4, the operation portion 4 can be moved forward. Thus, a simple locking device with a small number of parts is obtained, and the appearance of the clip is not impaired by the locking device.

＜第４の実施の形態＞
図１６及び図１７に本発明の第４の実施の形態を示す。
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、軸筒２の側壁より径方向外方に突出された操作部４と、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置と、軸筒２の後端部外面に設けた摩擦部７とを備える。 <Fourth embodiment>
16 and 17 show a fourth embodiment of the present invention.
The thermochromic writing instrument 1 of the present embodiment includes a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a pen tip 31 of the writing body 3 that can be projected and retracted from a front end hole 21 of the shaft tube 2. An operation mechanism 4 that protrudes radially outward from the side wall of the shaft cylinder 2, a lock device that prevents the operation section 4 from moving forward in the pen tip immersion state, And a friction part 7 provided on the outer surface of the rear end part.

・筆記体
前記筆記体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３２内に充填される熱変色性インキ３３と、該熱変色性インキ３３の後端に充填され且つ該熱変色性インキ３３の消費に伴い前進する追従体３４（例えば高粘度流体）とからなる。 Writing body The writing body 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, and a thermochromic ink 33 filled in the ink storage tube 32. It comprises a follower 34 (for example, a high-viscosity fluid) that fills the rear end of the thermochromic ink 33 and moves forward as the thermochromic ink 33 is consumed.

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チップのみからなる構成、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が取り付けられる。前記ペン先３１の内部には、前端のボールを前方に押圧するスプリングが収容される。前記スプリングは、圧縮コイルスプリングの前端部にロッド部を備えた構成であり、前記ロッド部の前端がボール後面に接触している。非筆記時、前記スプリングの前方付勢によりボールがボールペンチップ前端の内向きの前端縁部内面に密接され、ペン先３１の前端からのインキの漏出及びインキの蒸発を防止できる。 For example, the pen tip 31 includes only a metal ball-point pen tip that holds a ball rotatably at the front end, or a configuration that includes a pen tip holder made of a synthetic resin that holds a rear outer surface of the ball-point pen tip. It may be. Further, a tail plug having a vent hole through which the ink containing tube 32 and the outside can be vented is attached to the rear end opening of the ink containing tube 32. A spring that presses the ball at the front end forward is housed inside the nib 31. The spring includes a rod portion at a front end portion of a compression coil spring, and the front end of the rod portion is in contact with the rear surface of the ball. When not writing, the ball is brought into close contact with the inner surface of the front end edge portion of the front end of the ballpoint pen tip by the forward urging of the spring, thereby preventing ink leakage and ink evaporation from the front end of the pen tip 31.

・軸筒
前記軸筒２は、先細円筒状の前軸２ａと、該前軸２ａの後端部に連結される円筒状の中間軸２ｂと、該中間軸２ｂの後端部に連結される円筒状の後軸２ｃとからなる。前記軸筒２側壁（例えば中間軸２ｂの側壁及び後軸２ｃの側壁）には、軸方向に延びるスライド孔２２が形成される。前記軸筒２の後端（即ち後軸２ｃの後端）には、取付孔２３が軸方向に貫設される。前記取付孔２３に弾性材料からなる摩擦部７が圧入嵌合される。前記摩擦部７は、前記操作部４の軸方向の移動に連動せず、後軸２ｃ（軸筒２）の後端外面に固定される。前記摩擦部７は、操作部４と独立して設けられる。 The shaft cylinder 2 is connected to the tapered cylindrical front shaft 2a, the cylindrical intermediate shaft 2b connected to the rear end portion of the front shaft 2a, and the rear end portion of the intermediate shaft 2b. It consists of a cylindrical rear shaft 2c. A slide hole 22 extending in the axial direction is formed in the side wall of the shaft cylinder 2 (for example, the side wall of the intermediate shaft 2b and the side wall of the rear shaft 2c). A mounting hole 23 is provided in the axial direction at the rear end of the shaft cylinder 2 (that is, the rear end of the rear shaft 2c). The friction part 7 made of an elastic material is press-fitted into the mounting hole 23. The friction portion 7 is fixed to the outer surface of the rear end of the rear shaft 2c (shaft cylinder 2) without interlocking with the movement of the operation portion 4 in the axial direction. The friction part 7 is provided independently of the operation part 4.

・出没機構
前記出没機構は、回転カム機構を用いたサイドスライド式出没機構である。前記出没機構は、中間軸２ｂ内面に形成されたカム部と、該カム部に係合し且つ筆記体３の後端に当接する回転部材５（可動部）と、該回転部材５に係合し且つスライド孔２２より径方向外方に突出する操作部４と、軸筒２内に収容され且つ筆記体３を後方に付勢する弾発体６（例えば圧縮コイルスプリング）とからなる。本実施の形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもが操作部４を前方にスライド操作するダブルノック式である。前記回転部材５は合成樹脂（例えばポリアセタール樹脂）の成形体により得られる。 -Intrusion mechanism The intrusion mechanism is a side slide type intrusion mechanism using a rotating cam mechanism. The retracting mechanism includes a cam portion formed on the inner surface of the intermediate shaft 2b, a rotating member 5 (movable portion) that engages with the cam portion and contacts the rear end of the writing body 3, and engages with the rotating member 5. The operation unit 4 protrudes radially outward from the slide hole 22 and the elastic body 6 (for example, a compression coil spring) accommodated in the shaft cylinder 2 and biases the writing body 3 backward. The retracting mechanism of the present embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation slide the operation unit 4 forward. The rotating member 5 is obtained from a molded body of synthetic resin (for example, polyacetal resin).

前記カム部は、前方に突出する鋸歯状の複数のカム歯と、該カム歯間に形成される、軸方向に延びる複数のカム溝とを備える。前記回転部材５は、その外面に軸方向に延びる複数本（例えば４本）の突条を備え、該突条が、カム部のカム歯及びカム部のカム溝と係合される。前記操作部４の軸部４３の前端には、回転部材５の突条の後端と係合するカム歯が一体または別部材の取り付けにより形成される。 The cam portion includes a plurality of serrated cam teeth protruding forward and a plurality of cam grooves extending between the cam teeth and extending in the axial direction. The rotating member 5 includes a plurality of (for example, four) protrusions extending in the axial direction on the outer surface thereof, and the protrusions are engaged with cam teeth of the cam portion and cam grooves of the cam portion. At the front end of the shaft portion 43 of the operation portion 4, cam teeth that engage with the rear end of the protrusion of the rotating member 5 are formed integrally or by attaching another member.

・操作部
前記操作部４は、軸筒２側壁の軸方向に延びるスライド孔２２より径方向外方に突出される基部４１と、該基部４１より前方に連設されるクリップ部４２と、該基部４１より連設され且つ軸筒２内に軸方向に移動可能に収容される軸部４３と、を備える。前記クリップ部４２は、ポケット等の衣服を挟持可能である。前記操作部４は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体により得られる。前記クリップ部４２の裏面（内面）に玉部４４が突設される。前記基部４１と前記クリップ部４２、前記基部４１と前記軸部４３、前記クリップ部４２と前記玉部４４のそれぞれは、一部材により一体に形成されるかまたは二分材の組立により形成される。 The operation unit 4 includes a base 41 that protrudes radially outward from a slide hole 22 that extends in the axial direction of the side wall of the shaft tube 2, a clip unit 42 that is provided in front of the base 41, A shaft portion 43 that is provided continuously from the base portion 41 and is accommodated in the shaft cylinder 2 so as to be movable in the axial direction. The clip portion 42 can hold clothes such as pockets. The operation unit 4 is obtained from a molded body of synthetic resin (for example, polycarbonate resin). A ball portion 44 projects from the back surface (inner surface) of the clip portion 42. Each of the base part 41 and the clip part 42, the base part 41 and the shaft part 43, the clip part 42 and the ball part 44 are integrally formed by one member or formed by assembling a bisection material.

前記操作部４の基部４１が前記スライド孔２２に沿って軸方向に移動可能である。前記操作部４を前方に押圧操作することによって、筆記体３のペン先３１が軸筒２の前端孔２１から出没自在に構成される。 A base 41 of the operation unit 4 is movable in the axial direction along the slide hole 22. By pressing the operation unit 4 forward, the pen tip 31 of the writing body 3 is configured to be able to protrude and retract from the front end hole 21 of the shaft tube 2.

・ロック装置
前記ロック装置が、軸筒２の側壁外面に回動自在に取り付けられたロック部材８からなる。
前記ロック部材８は、中間部が前記軸筒２側壁外面にヒンジ部により回動自在に取り付けられ、一端部の径方向内面に軸筒２内壁より径方向内方に出没可能に設けられた係合凸部８２が設けられ、他端部が前記係合凸部８２を径方向外方に引き上げる解除部８３となる。 -Lock device The lock device comprises a lock member 8 rotatably attached to the outer surface of the side wall of the shaft tube 2.
The lock member 8 has a middle portion rotatably attached to an outer surface of the side wall of the shaft tube 2 by a hinge portion, and is provided on a radially inner surface of one end portion so as to be protruded and retracted radially inward from the inner wall of the shaft tube 2. A mating projection 82 is provided, and the other end serves as a release portion 83 that pulls the engagement projection 82 radially outward.

前記ロック部材８の一端部を径方向内方に押圧することにより、前記係合凸部８２が軸筒２側壁の貫通孔２４を通して軸筒２側壁内面より径方向内方に突出され、係合凸部８２が回転部材５の係合部９（回転部材５の外壁）に係合し、前記回転部材５の前方移動が阻止される。それにより、前記操作部４の前方移動が阻止される。一方、前記ロック部材８の他端部の解除部８３を径方向内方に押圧することにより、前記係合凸部８２が径方向外方に引き上げられ、係合凸部８２と回転部材５の係合部９との係合状態が解除され、回転部材５が前後方向に移動可能となり、それに伴い操作部４が前後方向に移動可能となる。すなわち、前記ロック装置のロック部材８と回転部材５（可動部）の係合部９とが係合状態にあるとき、前記操作部４の前方移動が阻止され、一方、前記ロック装置のロック部材８と回転部材５（可動部）との係合が解除された状態にあるとき、前記操作部４の前方移動が可能となる。 By pressing one end portion of the lock member 8 inward in the radial direction, the engaging convex portion 82 protrudes radially inward from the inner surface of the side wall of the shaft tube 2 through the through hole 24 in the side wall of the shaft tube 2 and engages. The convex part 82 engages with the engaging part 9 (the outer wall of the rotating member 5) of the rotating member 5, and the forward movement of the rotating member 5 is prevented. Thereby, the forward movement of the operation part 4 is prevented. On the other hand, by pressing the release portion 83 at the other end of the lock member 8 inward in the radial direction, the engaging convex portion 82 is pulled up radially outward, and the engaging convex portion 82 and the rotating member 5 The engagement state with the engaging portion 9 is released, the rotating member 5 can move in the front-rear direction, and the operation unit 4 can move in the front-rear direction accordingly. That is, when the locking member 8 of the locking device and the engaging portion 9 of the rotating member 5 (movable portion) are in the engaged state, the forward movement of the operating portion 4 is prevented, while the locking member of the locking device When the engagement between the rotary member 5 and the rotating member 5 (movable part) is released, the operation part 4 can be moved forward.

・ペン先の出没
ペン先没入状態から操作部４を前方に、弾発体６による後方付勢に抗してスライド操作すると、操作部４の軸部４３のカム歯によって回転部材５が前方に押圧され、前記回転部材５の突条がカム溝に沿って前方に移動するに伴って、前記回転部材５が筆記体３の後端を前方に押圧し、ペン先３１が前端孔２１より外部に突出される。このとき、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それにより、前記回転部材５の突条がカム部のカム歯に係合され、ペン先突出状態が維持される。 -When the operation unit 4 is slid forward from the pen tip immersion state against the rear urging force of the projectile 6, the rotating member 5 is moved forward by the cam teeth of the shaft portion 43 of the operation unit 4. As the ridge of the rotating member 5 moves forward along the cam groove, the rotating member 5 presses the rear end of the writing body 3 forward, and the pen tip 31 is external to the front end hole 21. Protruding. At this time, the rotating member 5 rotates by a certain angle with respect to the cam portion by the contact between the cam teeth of the shaft portion 43 and the protrusion of the rotating member 5. Thereby, the protrusion of the rotating member 5 is engaged with the cam teeth of the cam portion, and the pen tip protruding state is maintained.

ペン先突出状態から操作部４を前方にスライド操作すると、操作部４の軸部４３が回転部材５を前方に押圧し、前記軸部４３のカム歯と前記回転部材５の突条との当接によって回転部材５がカム部に対して一定角度だけ回転する。それによって、前記突条とカム部のカム歯との係合状態が解除され、弾発体６による後方付勢により、前記突条がカム部のカム溝に沿って後方に移動する。前記回転部材５が後方に移動することに伴って、筆記体３が後方に移動し、ペン先没入状態となる。 When the operation portion 4 is slid forward from the pen tip protruding state, the shaft portion 43 of the operation portion 4 presses the rotating member 5 forward, and the cam teeth of the shaft portion 43 and the protrusions of the rotating member 5 contact each other. As a result of the contact, the rotating member 5 rotates by a certain angle with respect to the cam portion. As a result, the engagement state between the ridge and the cam teeth of the cam portion is released, and the ridge moves rearward along the cam groove of the cam portion due to the rear urging by the elastic body 6. As the rotary member 5 moves rearward, the writing body 3 moves rearward and enters the pen tip immersion state.

・摩擦部
本実施の形態において、前記摩擦部７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−ブタジエン−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７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）からなるものよりも、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からなることが好ましい。また、前記摩擦部７は、軸筒２の後端部外面に少なくとも設ければよく、例えば、軸筒２の後端部外面もしくは後軸２ｃの後端部外面に弾性材料よりなる摩擦部７を圧入、係合、螺合、嵌合、接着、２色成形等によって固着する構成、または軸筒２２の全体もしくは後軸２ｃの全体が弾性材料により一体に形成される構成が挙げられる。 Friction part In the present embodiment, the elastic material constituting the friction part 7 is preferably a synthetic resin (rubber, elastomer) having elasticity, for example, a silicone resin, an SBS resin (styrene-butadiene-styrene copolymer). SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM), and the like. The synthetic resin having elasticity that constitutes the friction part 7 is a low-abrasion elastic material that hardly generates wear debris (rubbing debris) during friction, rather than a high-abrasion elastic material (for example, an eraser). Preferably it consists of. The friction portion 7 may be provided at least on the outer surface of the rear end portion of the shaft tube 2, for example, the friction portion 7 made of an elastic material on the outer surface of the rear end portion of the shaft tube 2 or the outer surface of the rear end portion of the rear shaft 2c. Are fixed by press-fitting, engagement, screwing, fitting, adhesion, two-color molding, or the like, or a configuration in which the entire shaft cylinder 22 or the entire rear shaft 2c is integrally formed of an elastic material.

・熱変色性インキ
本実施の形態において、前記熱変色性インキ３３は、可逆熱変色性インキが好ましい。前記可逆熱変色性インキは、発色状態から加熱により消色する加熱消色型、発色状態または消色状態を互変的に特定温度域で記憶保持する色彩記憶保持型、または、消色状態から加熱により発色し、発色状態からの冷却により消色状態に復する加熱発色型等、種々のタイプを単独または併用して構成することができる。 -Thermochromic ink In the present embodiment, the thermochromic ink 33 is preferably a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

また、前記可逆熱変色性インキに含有される色材は、従来より公知の（イ）電子供与性呈色性有機化合物、（ロ）電子受容性化合物、及び（ハ）前記両者の呈色反応の生起温度を決める反応媒体、の必須三成分を少なくとも含む可逆熱変色性組成物をマイクロカプセル中に内包させた可逆熱変色性顔料が好適に用いられる。 The coloring material contained in the reversible thermochromic ink includes conventionally known (a) electron donating color-forming organic compounds, (b) electron-accepting compounds, and (c) color reactions of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least the essential three components of a reaction medium for determining the occurrence temperature of the polymer is encapsulated in a microcapsule is preferably used.

本実施の形態では、図１８に示すように、温度変化による着色濃度の変化をプロットした曲線の形状が、温度を変色温度域より低温側から上昇させていく場合と逆に変色温度域より高温側から下降させていく場合とで異なる経路を辿って変色し、完全発色温度（ｔ１）以下の低温域での発色状態、または完全消色温度（ｔ４）以上の高温域での消色状態が、特定温度域〔ｔ２〜ｔ３の間の温度域（実質的二相保持温度域）〕で記憶保持できる色彩記憶保持型熱変色性インキが適用されることが好ましい。図１８において、ΔＨは、ヒステリシスの程度を示す温度幅（即ちヒステリシス幅）を示す。ΔＨの値が小さいと、変色前後の両状態のうち一方の状態しか存在しえない。ΔＨの値が大きいと、変色前後の各状態の保持が容易となる。 In the present embodiment, as shown in FIG. 18, the shape of the curve plotting the change in the color density due to the temperature change is higher than the color change temperature range, contrary to the case where the temperature is raised from the lower temperature side than the color change temperature range. The color changes by following a different route from the case of descending from the side, and the color develops in a low temperature region below the complete color development temperature (t 1 ), or the color erases in a high temperature region above the complete color erase temperature (t 4 ). It is preferable to apply a color memory holding type thermochromic ink whose state can be stored and held in a specific temperature range [temperature range between t 2 and t 3 (substantially two-phase holding temperature range)]. In FIG. 18, ΔH indicates a temperature width (ie, hysteresis width) indicating the degree of hysteresis. When the value of ΔH is small, only one of the two states before and after the color change can exist. When the value of ΔH is large, it is easy to maintain each state before and after the color change.

本実施の形態では、前記熱変色性インキの摩擦部７の摩擦熱による変色温度は、２５℃〜９５℃（好ましくは３６℃〜９５℃）に設定される。即ち、本実施の形態では、前記高温側変色点〔完全消色温度（ｔ４）〕を、２５℃〜９５℃（好ましくは、３６℃〜９０℃）の範囲に設定し、前記低温側変色点〔完全発色温度（ｔ１）〕を、−３０℃〜＋２０℃（好ましくは、−３０℃〜＋１０℃）の範囲に設定することが有効である。それにより、常態（日常の生活温度域）で呈する色彩の保持を有効に機能させることができるとともに、可逆熱変色性インキによる筆跡を摩擦部７による摩擦熱で容易に変色することができる。 In the present embodiment, the color change temperature due to frictional heat of the friction portion 7 of the thermochromic ink is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in this embodiment, the high temperature side discoloration point [complete decoloration temperature (t 4 )] is set in a range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration is performed. It is effective to set the point [complete color development temperature (t 1 )] within a range of −30 ° C. to + 20 ° C. (preferably −30 ° C. to + 10 ° C.). Accordingly, it is possible to effectively maintain the color exhibited in the normal state (daily life temperature range), and the handwriting by the reversible thermochromic ink can be easily changed in color by the frictional heat generated by the friction portion 7.

本実施の形態の熱変色性筆記具１は、ペン先没入状態における前記操作部４の前方への移動を阻止するロック装置を、前記摩擦部７より前方の軸筒２外面に設けたことにより、携帯時や摩擦操作時、ロック装置をロック状態にすることによって、操作部４を誤って前方に押圧操作することを回避でき、しかも、ロック状態のロック装置が摩擦操作性を阻害することなく、円滑な摩擦操作が可能となる。 The thermochromic writing instrument 1 of the present embodiment is provided with a locking device that prevents the operation unit 4 from moving forward in the pen tip immersion state on the outer surface of the shaft cylinder 2 in front of the friction unit 7. By locking the lock device when carrying or frictional operation, it is possible to avoid accidentally pressing the operation unit 4 forward, and the lock device in the locked state does not hinder the friction operability, Smooth friction operation is possible.

本実施の形態の熱変色性筆記具１は、前記軸筒２内部に、前記操作部４のスライド操作に連動して軸方向に移動可能な可動部５を備え、前記ロック装置が、一方が前記軸筒２に接続され且つ他方が前記可動部５の係合部９に係脱自在に構成されたロック部材８を備えることにより、部品点数の少ない簡易なロック装置を得るとともに、ロック装置によってクリップの外観性が損なわれることがない。 The thermochromic writing instrument 1 according to the present embodiment includes a movable part 5 that is movable in the axial direction in conjunction with the slide operation of the operation part 4 inside the shaft cylinder 2, and one of the locking devices is the above-described locking device. By providing the lock member 8 connected to the shaft cylinder 2 and detachably connected to the engaging portion 9 of the movable portion 5, a simple locking device with a small number of parts can be obtained, and the clip can be clipped by the locking device. The appearance of is not impaired.

１ 熱変色性筆記具
２ 軸筒
２ａ 前軸
２ｂ 中間軸
２ｃ 後軸
２１ 前端孔
２２ スライド孔
２３ 取付孔
２４ 貫通孔
３ 筆記体
３１ ペン先
３２ インキ収容管
３３ 熱変色性インキ
３４ 追従体
４ 操作部
４１ 基部
４２ クリップ部
４３ 軸部
４４ 玉部
５ 回転部材（可動部）
６ 弾発体
７ 摩擦部
８ ロック部材
８１ 切り欠き部
８２ 係合凸部
８３ 解除部
９ 係合部 DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Shaft cylinder 2a Front shaft 2b Intermediate shaft 2c Rear shaft 21 Front end hole 22 Slide hole 23 Mounting hole 24 Through hole 3 Writing body 31 Nib 32 Ink receiving tube 33 Thermochromic ink 34 Follower 4 Operation part 41 Base part 42 Clip part 43 Shaft part 44 Ball part 5 Rotating member (movable part)
6 Bullet 7 Friction part 8 Locking member 81 Notch part 82 Engaging convex part 83 Release part 9 Engaging part

Claims (1)

軸筒の内部に筆記体を軸方向に移動可能に収容し、前記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、前記軸筒の側壁に軸方向に延びるスライド孔を設け、前記スライド孔より操作部を径方向外方に突出させ、前記操作部を前記スライド孔に沿って軸方向に移動可能に構成し、前記操作部を前方にスライド操作することにより前記筆記体をペン先没入状態からペン先突出状態にさせ、前記軸筒の後端部に、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設けた熱変色性筆記具であって、
ペン先没入状態における前記操作部の前方への移動を阻止するロック装置を、前記摩擦部より前方の軸筒外面に設け、
前記操作部が、スライド孔より径方向外方に突出される基部と、該基部より前方に連設されるクリップ部とを備え、前記操作部の基部が前記スライド孔に沿って軸方向に移動可能に構成され、
前記ロック装置が、軸筒の外面に周方向に回転可能且つ軸方向移動不能に取り付けられる、切り欠き部を有する横断面Ｃ字状のロック部材を備え、前記ロック部材の切り欠き部以外の部分を前記操作部の基部よりも前方の前記スライド孔上に位置させた状態にあるとき、前記ロック部材により前記操作部の基部の前方への移動が阻止され、一方、前記ロック部材の切り欠き部を前記操作部の基部よりも前方の前記スライド孔上に位置させた状態にあるとき、前記操作部の基部の前方への移動が可能となり、
ペン先没入状態において前記ロック部材が前記基部の前端に近接配置されることを特徴とする熱変色性筆記具。 A cursive body is accommodated in the axial cylinder so as to be movable in the axial direction, a thermochromic ink is accommodated in the cursive body, and a pen tip capable of discharging the thermochromic ink is provided at the front end of the cursive body A slide hole extending in the axial direction is provided on the side wall of the shaft cylinder, the operation portion is protruded radially outward from the slide hole, and the operation portion is configured to be movable in the axial direction along the slide hole. By sliding the operation unit forward, the writing body is changed from a pen tip immersive state to a pen tip protruding state, and the handwriting of the thermochromic ink is rubbed at the rear end portion of the shaft tube. A thermochromic writing instrument provided with a friction part made of a low-abrasion elastic material capable of thermally discoloring the handwriting with frictional heat,
A locking device that prevents the operation unit from moving forward in the pen tip immersion state is provided on the outer surface of the shaft cylinder in front of the friction unit,
The operation part includes a base part protruding radially outward from the slide hole, and a clip part provided in front of the base part, and the base part of the operation part moves in the axial direction along the slide hole. Configured and possible
The lock device includes a lock member having a C-shaped cross section having a cutout portion, which is attached to the outer surface of the shaft cylinder so as to be rotatable in the circumferential direction and not movable in the axial direction, and a portion other than the cutout portion of the lock member Is positioned on the slide hole in front of the base portion of the operation portion, the lock member prevents the base portion of the operation portion from moving forward, while the notch portion of the lock member when a is in a state of being positioned on the front of the slide hole than the base portion of the operation unit, you can move forward of the base portion of the operation portion and Do Ri,
Thermochromic writing instrument in which the locking member is characterized Rukoto disposed close to the front end of the base in the pen tip retracted state.
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Publication number Priority date Publication date Assignee Title
FR1119247A (en) * 1955-01-07 1956-06-18 Pen with several ball cartridges, filled with ink, of different colors
JP2548125Y2 (en) * 1991-05-10 1997-09-17 株式会社壽 Locking device for swing type writing instrument
JP4485843B2 (en) * 2004-04-27 2010-06-23 三菱鉛筆株式会社 Composite writing instrument
JP4485842B2 (en) * 2004-04-27 2010-06-23 三菱鉛筆株式会社 Composite writing instrument
JP4485873B2 (en) * 2004-07-27 2010-06-23 三菱鉛筆株式会社 Composite writing instrument
JP5706107B2 (en) * 2010-02-03 2015-04-22 パイロットインキ株式会社 Thermochromic writing instrument

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