JP5603737B2 - Thermochromic writing instrument - Google Patents

Description

本発明は、熱変色性筆記具に関する。詳細には、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、前記筆記体のペン先を軸筒の前端孔から出没可能に構成した熱変色性筆記具に関する。 The present invention relates to a thermochromic writing instrument. Specifically, thermochromic ink is accommodated in the cursive body, a pen tip capable of discharging the thermochromic ink is provided at the front end of the cursive body, and the cursive body can be moved in the front-rear direction in the shaft cylinder. And a thermochromic writing instrument in which the pen tip of the writing body is configured to be able to protrude and retract from a front end hole of a shaft cylinder.

特許文献１には、軸筒内に筆記体を前後方向に移動可能に収容し、軸筒の外面に操作部を設け、前記操作部を操作することにより前記筆記体のペン先を軸筒の前端孔から出没可能に構成し、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該筆跡を熱変色可能な摩擦部を設けた熱変色性筆記具が開示されている。 In Patent Document 1, a writing body is accommodated in a shaft cylinder so as to be movable in the front-rear direction, an operation portion is provided on an outer surface of the shaft tube, and the pen tip of the writing body is attached to the shaft tube by operating the operation portion. It is configured to be able to appear and retract from a front end hole, accommodates thermochromic ink inside the cursive body, provides a pen tip capable of ejecting the thermochromic ink at the front end of the cursive body, on the outer surface of the shaft cylinder, There has been disclosed a thermochromic writing instrument provided with a friction portion capable of thermally changing the handwriting with frictional heat generated by rubbing the handwriting of the thermochromic ink.

前記特許文献１は、軸筒後端の操作部を前方に押圧するタイプにおいて操作部に摩擦部を設けた場合、該摩擦部を用いて摩擦操作すると、被筆記面によって操作部が前方に移動し、安定した摩擦操作を行うことができないおそれがある。特に、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を前方に押圧操作するタイプの出没機構（いわゆるダブルノック式）を採用し且つ操作部に摩擦部を設けた場合、ペン先突出状態において操作体が前後方向にがたつき、安定した摩擦操作を行うことができないおそれがある。 In Patent Document 1, when a friction part is provided in the operation part in the type in which the operation part at the rear end of the shaft cylinder is pressed forward, the operation part moves forward by the writing surface when a friction operation is performed using the friction part. However, there is a possibility that a stable friction operation cannot be performed. In particular, when both a pen tip protruding operation and a pen tip immersing operation employ a retracting mechanism (so-called double knock type) that pushes the operating portion forward and a friction portion is provided in the operating portion, the pen tip protrudes. In this state, the operating body may rattle in the front-rear direction, and a stable friction operation may not be performed.

また、特許文献１の図１２には、筒状の操作部を前後方向に移動可能に設け、前記筒状の操作部の外面にポケット等に挟持可能なクリップを突設し、前記筒状の操作部の後端外面に摩擦部を設けた構成が開示されている。しかし、この構成の熱変色性筆記具は、ペン先の出没操作時に摩擦部を押圧するため、摩擦部が手垢等で汚れるおそれがある。そして、前記摩擦部が汚れた状態で熱変色性インキの筆跡を摩擦した場合、筆跡を有する被筆記面（例えば紙面）が汚れるおそれがある。 Further, in FIG. 12 of Patent Document 1, a cylindrical operation portion is provided so as to be movable in the front-rear direction, and a clip that can be sandwiched in a pocket or the like is provided on the outer surface of the cylindrical operation portion. The structure which provided the friction part in the rear-end outer surface of the operation part is disclosed. However, since the thermochromic writing instrument having this configuration presses the friction portion during the pen tip operation, the friction portion may be soiled with dirt or the like. When the handwriting of the thermochromic ink is rubbed in a state where the friction portion is dirty, the writing surface (for example, paper surface) having the handwriting may be stained.

また、特許文献１の図１５には、操作部を軸筒側壁より径方向外方に突出させ、前記操作部を後方付勢に抗して前方に押圧操作することにより、ペン先没入状態からペン先突出状態にする構成（いわゆる多芯タイプのサイドスライド式）の出没機構を備え、軸筒の後端外面に摩擦部を設けた構成が開示されている。しかし、この構成の熱変色性筆記具は、ペン先突出状態からペン先没入状態にする際（ペン先突出状態を解除する際）、他の筆記体に取り付けられた操作体を操作しなければならない。そのため、複数の操作体（即ち複数の突出部分）を設ける必要があり、外観デザイン上の自由度が減少する。さらには、ポケット等に挟持可能なクリップを軸筒に設ける場合、より一層、突出部分が増え、外観デザイン上の自由度が減少する。 Further, in FIG. 15 of Patent Document 1, the operation portion is protruded radially outward from the side wall of the shaft cylinder, and the operation portion is pushed forward against the rear bias, thereby removing the pen tip from the immersive state. A configuration is disclosed in which a pen tip protruding state (so-called multi-core type side slide type) protruding and retracting mechanism is provided, and a friction portion is provided on the outer surface of the rear end of the shaft cylinder. However, the thermochromic writing instrument with this configuration must operate an operating tool attached to another writing tool when the pen tip protrudes from the pen tip protruding state (when the pen tip protruding state is canceled). . Therefore, it is necessary to provide a plurality of operating bodies (that is, a plurality of protruding portions), and the degree of freedom in appearance design is reduced. Furthermore, when a clip that can be held in a pocket or the like is provided on the shaft tube, the protruding portion is further increased, and the degree of freedom in appearance design is reduced.

国際公開第２００８／１０５２２７号パンフレットInternational Publication No. 2008/105227 Pamphlet

本発明は前記従来の問題点を解決するものであって、摩擦部を用いて安定した摩擦操作が可能となり、さらに、摩擦部が手垢等で汚れることを回避でき、しかも、外観デザイン上の自由度が増加する熱変色性筆記具を提供しようとするものである。尚、本発明で、「前」とは、ペン先側を指し、「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。 The present invention solves the above-mentioned conventional problems, enables a stable friction operation using the friction part, and further prevents the friction part from being soiled with hand dirt, etc. It is intended to provide a thermochromic writing instrument of increasing degree. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side. In the present invention, the “pen nib immersive state” refers to a state in which the pen nib is immersed in the shaft cylinder, and the “pen nib protruding state” refers to a state in which the pen nib projects outward from the front end of the shaft cylinder. Say.

＜１＞本願の第１の発明は、筆記体９の内部に熱変色性インキを収容し、前記筆記体９の前端に前記熱変色性インキが吐出可能なペン先９１を設け、前記筆記体９を軸筒２内に前後方向に移動可能に収容し、前記筆記体９を軸筒２内に設けた弾発体７により後方に付勢し、前記筆記体９のペン先９１を軸筒２の前端孔３１から出没可能に構成した熱変色性筆記具であって、前記軸筒２の側壁に前後方向に移動可能にクリップ体６を突出させ、前記クリップ体６前部の径方向内面に玉部６２を突出させ、ペン先没入状態から前記クリップ体６を弾発体７の後方付勢に抗して前方に移動し、前記クリップ体６の玉部６２を軸筒２側壁の係止部４２に係止させることによってペン先突出状態にし、前記ペン先突出状態から前記クリップ体６の玉部６２と軸筒２側壁の係止部４２との係止を解除することによってペン先没入状態にする出没機構を備え、前記軸筒２の後端に、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摩擦部１０を設けたことを要件とする。 <1> In the first invention of the present application, a thermochromic ink is accommodated in the cursive body 9, and a nib 91 capable of discharging the thermochromic ink is provided at the front end of the cursive body 9, and the cursive body 9 is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, the writing body 9 is urged rearward by a resilient body 7 provided in the shaft cylinder 2, and the nib 91 of the writing body 9 is moved to the shaft cylinder. 2 is a thermochromic writing instrument configured to be able to protrude and retract from the front end hole 31 of the second end, the clip body 6 protrudes from the side wall of the shaft cylinder 2 so as to be movable in the front-rear direction, and is formed on the radially inner surface of the front portion of the clip body 6. The ball 62 is protruded, and the clip body 6 is moved forward against the rear urging force of the elastic body 7 from the pen-tip immersion state, and the ball 62 of the clip body 6 is locked to the side wall of the shaft cylinder 2. By engaging with the portion 42, the pen tip protrudes, and the ball portion 6 of the clip body 6 from the pen tip protruding state. And a locking mechanism 42 that releases the locking portion 42 on the side wall of the shaft cylinder 2 to release the pen tip into a pen tip immersing state, and the handwriting of the thermochromic ink is rubbed against the rear end of the shaft cylinder 2 It is a requirement that the friction portion 10 capable of thermally discoloring the handwriting with frictional heat generated at the time is provided.

前記第１の発明の熱変色性筆記具１は、摩擦部１０を軸筒２の後端に設けたことにより、摩擦操作時、摩擦部１０の後方への移動が阻止されるため、摩擦部１０を用いて安定した摩擦操作が可能となる。また、前記第１の発明の熱変色性筆記具１は、ペン先９１を出没する際、クリップ体６を操作し、摩擦部１０を操作しないため、摩擦部１０が手垢等で汚れることを回避できる。また、前記第１の発明の熱変色性筆記具１は、軸筒２の側壁にクリップを設けたにもかかわらず、従来の多芯タイプのサイドスライド式の熱変色性筆記具に比べ、突出部分が少なく、外観デザイン上の自由度が増加し、スマートな外観を得ることができる。 In the thermochromic writing instrument 1 according to the first aspect of the present invention, since the friction portion 10 is provided at the rear end of the shaft cylinder 2, the friction portion 10 is prevented from moving backward during the friction operation. A stable friction operation can be performed using. Further, since the thermochromic writing instrument 1 according to the first invention operates the clip body 6 and does not operate the friction portion 10 when the pen tip 91 appears and disappears, the friction portion 10 can be prevented from being soiled by hand dirt or the like. . In addition, the thermochromic writing instrument 1 of the first invention has a protruding portion as compared with a conventional multi-core type side slide thermochromic writing instrument, although a clip is provided on the side wall of the shaft tube 2. The degree of freedom in appearance design is increased, and a smart appearance can be obtained.

尚、本発明において、前記クリップ体６の玉部６２は、軸筒２側壁との間においてポケット等に挟持可能なものである。尚、本発明において、軸筒２の後端に摩擦部１０を設けるとは、前記摩擦部１０は、少なくとも摩擦操作時に、前記摩擦部１０を軸筒２の後端に設ける構成であればよく、例えば、摩擦部１０が軸筒２後端より出没する構成であってもよい。 In the present invention, the ball portion 62 of the clip body 6 can be held in a pocket or the like between the side wall of the shaft cylinder 2. In the present invention, the provision of the friction part 10 at the rear end of the shaft cylinder 2 may be any structure as long as the friction part 10 is provided at the rear end of the shaft cylinder 2 at least during a friction operation. For example, the structure which the friction part 10 protrudes and protrudes from the rear end of the axial cylinder 2 may be sufficient.

＜２＞本願の第２の発明は、前記第１の発明の熱変色性筆記具１において、前記摩擦部１０が弾性材料からなり、前記摩擦部１０の一部がペン先没入状態のクリップ体６に当接してなることを要件とする。 <2> According to a second invention of the present application, in the thermochromic writing instrument 1 of the first invention, the friction portion 10 is made of an elastic material, and a part of the friction portion 10 is a pen body immersive clip body 6. It is necessary to be in contact with.

前記第２の発明の熱変色性筆記具１は、ペン先突出状態からペン先没入状態にする際、弾発体７の後方付勢により筆記体９及びクリップ体６が後方移動し、クリップ体６と弾性材料よりなる摩擦部１０とが当接するため、その際に筆記体９に加わる衝撃を緩和できる。その結果、筆記体９内のインキの逆流等やペン先からの空気の混入を防止できる。 When the thermochromic writing instrument 1 of the second invention is changed from the pen tip protruding state to the pen tip immersing state, the writing member 9 and the clip member 6 are moved backward by the rear urging of the bullet 7 and the clip member 6 is moved backward. And the friction part 10 made of an elastic material come into contact with each other, so that the impact applied to the cursive body 9 can be reduced. As a result, it is possible to prevent backflow of ink in the writing body 9 and air from the pen tip.

本発明の熱変色性筆記具は、摩擦部を用いて安定した摩擦操作が可能となり、さらに、摩擦部が手垢等で汚れることを回避でき、しかも、外観デザイン上の自由度が増加し、スマートな外観を得ることができる。 The thermochromic writing instrument of the present invention enables a stable friction operation using the friction part, and further prevents the friction part from being soiled with dirt, etc., and further increases the degree of freedom in appearance design and is smart. Appearance can be obtained.

本発明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 embodiment of this invention. 図１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及び図２に本発明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の側壁外面に前後方向に移動可能に設けた単一のクリップ体６と、該軸筒２内に収容される筆記体９と、該筆記体９のペン先９１を軸筒２の前端孔３１より出没自在にさせる出没機構とを備える。 1 and 2 show an embodiment of the present invention.
The thermochromic writing instrument 1 of the present embodiment is housed in the shaft tube 2, a single clip body 6 provided on the outer surface of the side wall of the shaft tube 2 so as to be movable in the front-rear direction, and the shaft tube 2. A writing body 9 and a retracting mechanism that allows the pen tip 91 of the writing body 9 to be protruded and retracted from the front end hole 31 of the shaft cylinder 2 are provided.

・筆記体
前記筆記体９は、ペン先９１と、該ペン先９１が前端開口部に圧入固着されたインキ収容管と、該インキ収容管内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 body The cursive body 9 includes a nib 91, an ink containing tube in which the nib 91 is press-fitted and fixed to the front end opening, a thermochromic ink filled in the ink containing tube, and the thermochromic property. It consists of a follower (for example, a high-viscosity fluid) that fills the trailing edge of the ink and moves forward as the thermochromic ink is consumed.

前記ペン先９１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、前記インキ収容管の後端開口部に、インキ収容管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。 The pen nib 91 is composed of, for example, only a metal ballpoint pen tip holding a ball rotatably at the front end, or a synthetic resin nib holder holding the rear outer surface of the ballpoint pen tip. It may be. A tail plug provided with a vent hole through which the ink containing tube and the outside can be vented is attached to the rear end opening of the ink containing tube.

・軸筒
前記軸筒２は、先細円筒状の前軸３と、該前軸３の後端部に連結される円筒状の中間軸４と、該中間軸４の後端部に連結される円筒状の後軸５とからなる。前記中間軸４の側壁及び後軸５の側壁には、前後方向に延びるスライド孔２１が形成される。 The shaft cylinder 2 is connected to a tapered cylindrical front shaft 3, a cylindrical intermediate shaft 4 connected to the rear end portion of the front shaft 3, and a rear end portion of the intermediate shaft 4. It consists of a cylindrical rear shaft 5. Slide holes 21 extending in the front-rear direction are formed in the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5.

前記前軸３は、合成樹脂の成形体からなる先細円筒状の本体３２と、該本体３２外面に設けられる弾性材料からなる把持部３３とからなる。前記把持部３３は、２色成形または装着により設けられる。前記前軸３の後端部は縮径され、その外面にはオネジ部が形成される。前記前軸３の前端には、前端孔３１が前後方向に貫設される。 The front shaft 3 includes a tapered cylindrical main body 32 made of a synthetic resin molding and a grip 33 made of an elastic material provided on the outer surface of the main body 32. The grip portion 33 is provided by two-color molding or mounting. The rear end portion of the front shaft 3 is reduced in diameter, and a male screw portion is formed on the outer surface thereof. A front end hole 31 is provided in the front end of the front shaft 3 in the front-rear direction.

前記中間軸４は、円筒状の合成樹脂の成形体からなる。前記中間軸４の前端部内面には、メネジ部が形成される。前記メネジ部に前記前軸３のオネジ部が螺合可能である。前記中間軸４の後端部側壁には、前後方向に延びる第１の長孔４１が形成される。前記第１の長孔４１の僅かに前方の中間軸４の側壁には、孔からなる係止部４２が形成される。前記係止部４２は、これ以外にも、凹部、凸部であってもよい。 The intermediate shaft 4 is formed of a cylindrical synthetic resin molded body. A female thread portion is formed on the inner surface of the front end portion of the intermediate shaft 4. The male screw portion of the front shaft 3 can be screwed into the female screw portion. A first elongated hole 41 extending in the front-rear direction is formed in the rear end side wall of the intermediate shaft 4. A locking portion 42 made of a hole is formed on the side wall of the intermediate shaft 4 slightly in front of the first long hole 41. In addition to this, the engaging portion 42 may be a concave portion or a convex portion.

前記後軸５は、円筒状の合成樹脂の成形体からなる。前記後軸５の前端部側壁には、前端が開放され且つ後端が閉鎖された、前後方向に延びる第２の長孔５１が形成される。また、前記後軸５の後端には、取付孔５２が前後方向に貫設される。前記取付孔５２に弾性材料からなる摩擦部１０が圧入嵌合される。前記第１の長孔４１と第２の長孔５１が連通するように、後軸５の前部を中間軸４の後端部に固着する。それにより、軸筒２の側壁にスライド孔２１が形成される。 The rear shaft 5 is formed of a cylindrical synthetic resin molded body. The front end side wall of the rear shaft 5 is formed with a second long hole 51 extending in the front-rear direction with the front end open and the rear end closed. A mounting hole 52 is provided in the rear end of the rear shaft 5 in the front-rear direction. The friction portion 10 made of an elastic material is press-fitted into the mounting hole 52. The front portion of the rear shaft 5 is fixed to the rear end portion of the intermediate shaft 4 so that the first long hole 41 and the second long hole 51 communicate with each other. Thereby, a slide hole 21 is formed in the side wall of the shaft tube 2.

前記クリップ体６は、前後方向に延びるクリップ本体６１と、該クリップ本体６１の前部の径方向内面に突設される玉部６２と、部該クリップ本体６１の後部に一体に連設される基部６４と、該基部６４より後方に突出され且つクリップ本体の後端よりも後方に一体に連設される操作部６３と、該基部６４の径方向内方に一体に連設されるＵ字状の屈曲部６５と、該屈曲部６５の後端部に一体に連設される当接部６６とからなる。前記クリップ体６は、合成樹脂の成形体により得られる。前記屈曲部６５の内面には、クリップ弾発体８（例えば圧縮コイルスプリング）が収容され、屈曲部６５を径方向の弾発力が付与される。これ以外にも、前記クリップ弾発体８を備えず、屈曲部６５のみの構成でも、屈曲部６５に径方向の弾発力を付与することができる。 The clip body 6 is integrally connected to a clip main body 61 extending in the front-rear direction, a ball 62 projecting from a radially inner surface of the front portion of the clip main body 61, and a rear portion of the clip main body 61. A base portion 64; an operation portion 63 protruding rearward from the base portion 64 and integrally provided rearward of the rear end of the clip body; and a U-shape integrally provided radially inward of the base portion 64 And a contact portion 66 integrally connected to the rear end portion of the bent portion 65. The clip body 6 is obtained by a synthetic resin molded body. A clip elastic body 8 (for example, a compression coil spring) is accommodated on the inner surface of the bent portion 65, and a radial elastic force is applied to the bent portion 65. In addition to this, even when the clip bullet body 8 is not provided and only the bent portion 65 is configured, a radial elastic force can be applied to the bent portion 65.

前記摩擦部１０が固定された後軸５を中間軸４の後端部に連結することによって、前記摩擦部１０が軸筒２の後端に固定される。また、前軸３と中間軸４とが螺合により着脱自在に連結され、それにより、筆記体９を交換可能にできる。 By connecting the rear shaft 5 to which the friction portion 10 is fixed to the rear end portion of the intermediate shaft 4, the friction portion 10 is fixed to the rear end of the shaft tube 2. Further, the front shaft 3 and the intermediate shaft 4 are detachably connected by screwing, whereby the writing body 9 can be exchanged.

・出没機構
前記出没機構は、クリップ体６を前後に移動させることにより、ペン先９１を出没させるものである。 -In / out mechanism The in / out mechanism moves the clip body 6 back and forth to make the pen tip 91 appear and disappear.

・ペン先の出没
ペン先没入状態からクリップ体６を前方に、弾発体７による後方付勢に抗してスライド操作すると、クリップ体６の玉部６２が、軸筒２の側壁の係止部４２に係止され、ペン先突出状態が維持される。 -When the clip body 6 is slid forward from the pen tip retracted state against the rear urging force of the elastic body 7, the ball portion 62 of the clip body 6 engages with the side wall of the shaft cylinder 2. It is latched by the part 42 and the pen tip protruding state is maintained.

ペン先突出状態からクリップ体６の操作部６３を径方向内方に押圧操作すると、基部６４を支点にしてクリップ体６の前端部が径方向外方に変位し、玉部６２と係止部４２との係止状態が解除される。
それと同時に、弾発体７による後方付勢により、筆記体９が後方に移動し、クリップ体６の当接部６６が摩擦部１０に当接され、ペン先没入状態が維持される。 When the operation portion 63 of the clip body 6 is pressed radially inward from the pen tip protruding state, the front end portion of the clip body 6 is displaced radially outward with the base portion 64 as a fulcrum, and the ball portion 62 and the locking portion The locked state with 42 is released.
At the same time, the writing body 9 is moved rearward by the rear urging by the projectile 7, and the contact portion 66 of the clip body 6 is brought into contact with the friction portion 10 and the pen tip immersion state is maintained.

・摩擦部
本実施の形態において、前記摩擦部１０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１０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１０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の後端部に弾性材料よりなる摩擦部１０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５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 10 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 elastic synthetic resin constituting the friction part 10 is a low-abrasion elastic material in which almost no wear debris (erasure debris) is generated during friction, compared to a high-abrasion elastic material (for example, an eraser). Preferably it consists of. The friction portion 10 may be provided at least on the outer surface of the rear end portion of the shaft tube 2. For example, the friction portion 10 made of an elastic material is press-fitted, engaged, screwed, and fitted to the rear end portion of the shaft tube 2. In other words, there may be mentioned a structure that is fixed by adhesion, two-color molding or the like, or a structure in which the entire shaft cylinder 2 or the entire rear shaft 5 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 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３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（ｔ_１）以下の低温域での発色状態、または完全消色温度（ｔ_４）以上の高温域での消色状態が、特定温度域〔ｔ_２〜ｔ_３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３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. 3, 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. 3, 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１０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（ｔ_４）〕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（ｔ_１）〕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１０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 frictional part 10 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.). Thereby, while maintaining the color exhibited in a normal state (daily life temperature range) can be effectively functioned, the handwriting by the reversible thermochromic ink can be easily changed in color by the frictional heat generated by the friction portion 10.

本実施の形態の熱変色性筆記具１は、摩擦部１０を軸筒２の後端に設けたことにより、摩擦操作時、摩擦部１０の後方への移動が阻止されるため、摩擦部１０を用いて安定した摩擦操作が可能となる。また、前記第１の発明の熱変色性筆記具１は、ペン先９１を出没する際、クリップ体６を操作し、摩擦部１０を操作しないため、摩擦部１０が手垢等で汚れることを回避できる。また、前記第１の発明の熱変色性筆記具１は、軸筒２の側壁にクリップを設けたにもかかわらず、従来の多芯タイプのサイドスライド式の熱変色性筆記具に比べ、突出部分が少なく、外観デザイン上の自由度が増加し、スマートな外観を得ることができる。 In the thermochromic writing instrument 1 of the present embodiment, since the friction part 10 is provided at the rear end of the shaft tube 2, the friction part 10 is prevented from moving backward during the friction operation. Using this, stable friction operation becomes possible. Further, since the thermochromic writing instrument 1 according to the first invention operates the clip body 6 and does not operate the friction portion 10 when the pen tip 91 appears and disappears, the friction portion 10 can be prevented from being soiled by hand dirt or the like. . In addition, the thermochromic writing instrument 1 of the first invention has a protruding portion as compared with a conventional multi-core type side slide thermochromic writing instrument, although a clip is provided on the side wall of the shaft tube 2. The degree of freedom in appearance design is increased, and a smart appearance can be obtained.

本実施の形態の熱変色性筆記具１は、ペン先突出状態からペン先没入状態にする際、弾発体７の後方付勢により筆記体９及びクリップ体６が後方移動し、クリップ体６と弾性材料よりなる摩擦部１０とが当接するため、その際に筆記体９に加わる衝撃を緩和できる。その結果、筆記体９内のインキの逆流等やペン先９１からの空気の混入を防止できる。 When the thermochromic writing instrument 1 according to the present embodiment is changed from the pen tip protruding state to the pen tip immersing state, the writing body 9 and the clip body 6 are moved rearward by the rear urging of the projectile body 7, and the clip body 6 Since the friction part 10 made of an elastic material comes into contact, the impact applied to the cursive body 9 can be reduced. As a result, it is possible to prevent backflow of ink in the writing body 9 and air from the nib 91.

１ 熱変色性筆記具
２ 軸筒
２１ スライド孔
３ 前軸
３１ 前端孔
３２ 本体
３３ 把持部
４ 中間軸
４１ 第１の長孔
４２ 係止部
５ 後軸
５１ 第２の長孔
５２ 取付孔
６ クリップ体
６１ クリップ本体
６２ 玉部
６３ 操作部
６４ 基部
６５ 屈曲部
６６ 当接部
７ 弾発体
８ クリップ弾発体
９ 筆記体
９１ ペン先
１０ 摩擦部 DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Shaft cylinder 21 Slide hole 3 Front shaft 31 Front end hole 32 Main body 33 Holding part 4 Intermediate shaft 41 First long hole 42 Locking part 5 Rear shaft 51 Second long hole 52 Mounting hole 6 Clip body 61 clip body 62 ball part 63 operation part 64 base part 65 bending part 66 contact part 7 projectile 8 clip projectile 9 writing body 91 nib 10 friction part

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、前記筆記体を軸筒内に設けた弾発体により後方に付勢し、前記筆記体のペン先を軸筒の前端孔から出没可能に構成した熱変色性筆記具であって、
前記軸筒の側壁に前後方向に移動可能にクリップ体を突出させ、前記クリップ体前部の径方向内面に玉部を突出させ、ペン先没入状態から前記クリップ体を弾発体の後方付勢に抗して前方に移動し、前記クリップ体の玉部を軸筒側壁の係止部に係止させることによってペン先突出状態にし、前記ペン先突出状態から前記クリップ体の玉部と軸筒側壁の係止部との係止を解除することによってペン先没入状態にする出没機構を備え、前記軸筒の後端に、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摩擦部を設けるとともに、前記摩擦部が弾性材料からなり、前記摩擦部の一部がペン先没入状態のクリップ体に当接することを特徴とする熱変色性筆記具。 A thermochromic ink is accommodated inside the cursive body, a pen tip capable of ejecting the thermochromic ink is provided at the front end of the cursive body, and the cursive body is accommodated in the shaft cylinder so as to be movable in the front-rear direction. A thermochromic writing instrument configured such that the writing body is urged rearward by a projectile provided in a shaft cylinder, and the pen tip of the writing body is configured to be able to protrude and retract from a front end hole of the shaft cylinder,
A clip body is protruded on the side wall of the shaft cylinder so as to be movable in the front-rear direction, a ball part is protruded on a radially inner surface of the front portion of the clip body, and the clip body is urged rearward from the pen tip immersed state. The pen body protrudes from the pen tip protruding state by locking the ball portion of the clip body to the locking portion of the shaft cylinder side wall, and the ball portion of the clip body and the shaft tube from the pen tip protruding state. It is equipped with a retracting mechanism that makes the pen tip immersive by releasing the locking with the locking portion of the side wall, and frictional heat generated by rubbing the handwriting of the thermochromic ink at the rear end of the shaft cylinder.該筆track of providing a thermochromic possible friction portion Rutotomoni, the friction portion is made of an elastic material, partially thermochromic writing instrument, characterized in that in contact with the clip of the pen tip retracted state of the friction portion. 前記軸筒が、先細円筒状の前軸と、該前軸の後端部に連結される円筒状の中間軸と、該中間軸の後端部に連結される円筒状の後軸とからなり、前記後軸の後端に前記摩擦部を設けるとともに、前記中間軸の側壁及び後軸の側壁に、クリップ体が前後方向に移動可能に突出する、前後方向に延びるスライド孔を形成したことを特徴とする請求項１記載の熱変色性筆記具。 The shaft cylinder includes a tapered cylindrical front shaft, a cylindrical intermediate shaft connected to the rear end portion of the front shaft, and a cylindrical rear shaft connected to the rear end portion of the intermediate shaft. In addition, the friction portion is provided at the rear end of the rear shaft, and a slide hole extending in the front-rear direction is formed in the side wall of the intermediate shaft and the side wall of the rear shaft so that the clip body protrudes movably in the front-rear direction. The thermochromic writing instrument according to claim 1, wherein

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