JP6756877B2 - Thermal discoloration writing instrument - Google Patents

Thermal discoloration writing instrument Download PDF

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JP6756877B2
JP6756877B2 JP2019109373A JP2019109373A JP6756877B2 JP 6756877 B2 JP6756877 B2 JP 6756877B2 JP 2019109373 A JP2019109373 A JP 2019109373A JP 2019109373 A JP2019109373 A JP 2019109373A JP 6756877 B2 JP6756877 B2 JP 6756877B2
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clip body
pen tip
shaft
cam
rotating member
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JP2019147396A (en
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伊藤　喜博
喜博 伊藤
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Pilot Ink Co Ltd
Pilot Corp KK
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Pilot Corp KK
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Description

本発明は、熱変色性筆記具に関する。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, the cursive ink is housed inside the cursive, a pen tip capable of ejecting the cursive ink is provided at the front end of the cursive, and the cursive can be moved in the front-rear direction in the barrel. The present invention relates to a thermochromic writing instrument which is housed in a cursive and has a structure in which a pen tip of the cursive can be seen and removed from a front end hole of a barrel.

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 cursive is housed in a barrel so as to be movable in the front-rear direction, an operation unit is provided on the outer surface of the barrel, and the pen tip of the cursive is moved by operating the operation portion. It is configured so that it can appear and disappear from the front end hole, heat-discoloring ink is stored inside the cursive, a pen tip capable of ejecting the heat-discoloring ink is provided at the front end of the cursive, and the outer surface of the barrel is provided with a pen tip. A thermochromic writing tool provided with a friction portion capable of thermally discoloring the cursive by rubbing the handwriting of the thermochromic ink and the frictional heat generated at that time is disclosed.

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。 According to Patent Document 1, when a friction portion is provided in the operation portion in a type in which the operation portion at the rear end of the barrel is pressed forward, when the friction operation is performed using the friction portion, the operation portion moves forward by the writing surface. However, there is a risk that stable friction operation cannot be performed. In particular, when both the pen tip protruding operation and the pen tip immersion operation employ a type of retracting mechanism (so-called double knock type) in which the operating portion is pressed 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, making it impossible to perform a stable friction operation.

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 tubular operating portion is provided so as to be movable in the front-rear direction, and a clip that can be held in a pocket or the like is provided on the outer surface of the tubular operating portion. A configuration in which a friction portion is provided on the outer surface of the rear end of the operation portion is disclosed. However, since the heat-discoloring writing instrument having this configuration presses the friction portion when the pen tip appears and disappears, the friction portion may become dirty with hand stains or the like. If the handwriting of the heat-discoloring ink is rubbed while the friction portion is dirty, the writing surface (for example, the paper surface) having the handwriting may be soiled.

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 operating portion is projected outward in the radial direction from the side wall of the shaft cylinder, and the operating portion is pressed forward against the rearward bias to prevent the pen tip from being immersed. A configuration is disclosed in which a pen tip protruding state (so-called multi-core type side slide type) is provided, and a friction portion is provided on the outer surface of the rear end of the barrel. However, the thermochromic writing instrument having this configuration must operate an operating body attached to another cursive when changing from the pen tip protruding state to the pen tip immersion state (when releasing the pen tip protruding state). .. Therefore, it is necessary to provide a plurality of operating bodies (that is, a plurality of protruding portions), which reduces the degree of freedom in appearance design. Furthermore, when a clip that can be held in a pocket or the like is provided on the shaft cylinder, the number of protruding portions 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。 The present invention solves the above-mentioned conventional problems, enables stable friction operation by using the friction portion, prevents the friction portion from being soiled by hand stains, etc., and is free in appearance design. It is intended to provide a thermochromic writing instrument with an increasing degree of freedom.

上記に加え、本発明は、以下の作用効果を奏する熱変色性筆記具の提供を目的とする。
（１）ユーザーが操作方法を容易に習得でき、操作方法が簡単である。
（２）クリップ体をスライド孔に容易に挿入できる。
（３）軸筒全体が不必要に長くなることを回避できる。
（４）ペン先突出状態でクリップ体の近傍を把持した場合でも、安定した摩擦操作が可能である。
（５）クリップ体の挟持性能が向上するとともにクリップ体のぐらつきを防止できる。
（６）ペン先突出状態からペン先没入状態にする際、筆記体に加わる衝撃を緩和できる。 In addition to the above, an object of the present invention is to provide a thermochromic writing instrument having the following effects.
(1) The user can easily learn the operation method, and the operation method is simple.
(2) The clip body can be easily inserted into the slide hole.
(3) It is possible to prevent the entire shaft cylinder from becoming unnecessarily long.
(4) Stable friction operation is possible even when the vicinity of the clip body is gripped with the pen tip protruding.
(5) The holding performance of the clip body can be improved and the wobbling of the clip body can be prevented.
(6) When changing from the pen tip protruding state to the pen tip immersive state, the impact applied to the cursive can be alleviated.

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。 In the present invention, "front" refers to the pen tip side, and "rear" refers to the opposite side. In the present invention, the "pen tip immersion state" means a state in which the pen tip is immersed in the barrel, and the "pen tip protruding state" means a state in which the pen tip protrudes outward from the front end of the barrel. To say.

上記目的を達成するために、本願発明の熱変色性筆記具は、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構成としてある。 In order to achieve the above object, the thermochromic writing tool of the present invention accommodates a cursive containing a thermochromic ink inside in a barrel, and operates the operating body provided on the barrel to write the writing. A heat-discoloring writing tool in which the body is moved in the front-rear direction so that the pen tip of the writing body can appear and disappear from the tip of the writing tool, and the frictional heat generated at that time by rubbing the handwriting of the heat-changing ink. A friction portion capable of thermally discoloring the handwriting and at least one clip body as the operating body are provided, the friction portion is provided at the rear end of the barrel, and the clip is provided at a portion other than the rear end of the barrel. It has a structure with a body.

上記構成によれば、摩擦部を、クリップ体（操作体）から独立させて軸筒の後端に設けたことにより、摩擦操作時に、摩擦部が後方へ移動することがなく、摩擦部を用いた摩擦操作が安定したものとなる。また、ペン先出没の操作をするときに摩擦部に触れる必要がないので、摩擦部が手垢等で汚れることを回避できる。 According to the above configuration, since the friction portion is provided at the rear end of the axle cylinder independently of the clip body (operation body), the friction portion does not move backward during the friction operation, and the friction portion is used. The friction operation that was used becomes stable. Further, since it is not necessary to touch the friction portion when operating the pen tip infestation, it is possible to prevent the friction portion from becoming dirty with hand stains or the like.

好ましくは、上述した本発明の熱変色性筆記具において、前記操作体として単一の前記クリップ体のみを備え、単一の前記クリップ体を操作することにより、前記筆記体のペン先を突出状態及び没入状態にすることが可能な構成とする。 Preferably, in the thermochromic writing tool of the present invention described above, only a single clip body is provided as the operation body, and by operating the single clip body, the pen tip of the writing body is projected. The configuration should be immersive.

上記構成によれば、ペン先出没の操作を単一のクリップ体で行うことができ、軸筒に複数の操作体（即ち複数の突出部分）を設ける必要がなくなる。さらに、操作体であるクリップ体は、ポケット等に挟持可能なクリップを兼ねるので、外観上、操作体としての突出部分をなくすことができ、熱変色性筆記具のデザイン上の自由度を増大させ、スマートな外観を得ることができる。 According to the above configuration, the operation of moving the pen tip can be performed with a single clip body, and it is not necessary to provide a plurality of operating bodies (that is, a plurality of protruding portions) on the shaft cylinder. Furthermore, since the clip body, which is the operating body, also serves as a clip that can be held in a pocket or the like, it is possible to eliminate the protruding portion as the operating body in appearance, increasing the degree of freedom in the design of the thermochromic writing instrument. You can get a smart look.

上述した本発明の熱変色性筆記具において、前記軸筒が、互いに連結可能な複数の部品からなる構成としてもよく、この場合に、前記軸筒の後端を含む部分が前記部品としての後軸からなり、前記後軸の後端部に前記摩擦部を設けた構成としてもよい。すなわち、本熱変色性筆記具を構成する軸筒は、一本の筒状体であってもよいし、複数の部品を互いに連結させて一本の筒状体となるものでもよい。 In the thermochromic writing instrument of the present invention described above, the shaft cylinder may be composed of a plurality of parts that can be connected to each other. In this case, the portion including the rear end of the shaft cylinder is the rear shaft as the component. The friction portion may be provided at the rear end portion of the rear shaft. That is, the shaft cylinder constituting the thermochromic writing instrument may be a single tubular body, or a plurality of parts may be connected to each other to form a single tubular body.

好ましくは、上述した本発明の熱変色性筆記具において、前記軸筒の側壁に前後方向に延びるスライド孔を設け、前記スライド孔に配設した前記クリップ体を前方へスライド操作することで、前記筆記体のペン先を没入状態から突出状態にする出没機構を備えた構成とする。 Preferably, in the above-described thermochromic writing instrument of the present invention, the writing is performed by providing a slide hole extending in the front-rear direction on the side wall of the barrel and sliding the clip body arranged in the slide hole forward. The structure is equipped with a haunting mechanism that changes the pen tip of the body from the immersive state to the protruding state.

上記構成によれば、クリップ体を前方へスライド操作することで、ペン先を突出状態及び没入状態にすることができ（いわゆるダブルノック式の出没機構）、操作方法が簡単であり、ユーザーが操作方法を容易に習得できる。 According to the above configuration, by sliding the clip body forward, the pen tip can be in the protruding state and the immersive state (so-called double knock type infestation mechanism), the operation method is simple, and the user can operate it. You can easily learn the method.

好ましくは、上述した本発明の熱変色性筆記具において、前記軸筒が、互いに連結可能な二以上の部品からなり、前記軸筒を構成する二つの前記部品の各側壁に、前端又は後端が開放され且つ前後方向に延びる第１又は第２の長孔をそれぞれ設け、二つの前記部品を連結したときに、前記第１及び第２の長孔が、互いに連通して前記スライド孔を形成する構成とする。 Preferably, in the thermochromic writing instrument of the present invention described above, the barrel is composed of two or more parts that can be connected to each other, and each side wall of the two parts constituting the barrel has a front end or a rear end. A first or second elongated hole that is open and extends in the front-rear direction is provided, respectively, and when the two components are connected, the first and second elongated holes communicate with each other to form the slide hole. It is configured.

上記構成によれば、例えば、後方に開放された第１の長孔と、前方に開放された第２の長孔とでスライド孔を形成した場合は、軸筒を構成する二つの部品を連結する際（即ちスライド孔を形成する際）に、第１及び第２の長孔の開放端を介して、クリップ体の取付部分をスライド孔に容易に挿入することができ、クリップ体と軸筒とを効率よく組み立てることが可能となる。 According to the above configuration, for example, when a slide hole is formed by a first elongated hole opened rearward and a second elongated hole opened forward, two components constituting the axle cylinder are connected. (That is, when forming the slide hole), the attachment portion of the clip body can be easily inserted into the slide hole through the open ends of the first and second elongated holes, and the clip body and the shaft cylinder can be inserted. And can be assembled efficiently.

好ましくは、上述した本発明の熱変色性筆記具において、前記軸筒を構成する二つの前記部品の各側壁を、互いに径方向に重なるように連結し、前記第１及び第２の長孔が、互いに径方向に重なった状態で連通して前記スライド孔を形成する構成とする。 Preferably, in the above-described thermochromic writing instrument of the present invention, the side walls of the two components constituting the barrel are connected so as to overlap each other in the radial direction, and the first and second elongated holes are formed. The slide holes are formed by communicating with each other in a state of overlapping in the radial direction.

上記構成によれば、第１及び第２の長孔を、互いに径方向に重なった状態で連通させたことにより、軸筒全体が不必要に長くなることを回避できる。すなわち、第１及び第２の長孔の重複部分はスライド孔の全長に影響を与えないのである。尚、「径方向に重なる」の構成については、後に具体例を挙げて詳述する。 According to the above configuration, it is possible to prevent the entire shaft cylinder from becoming unnecessarily long by communicating the first and second elongated holes so as to overlap each other in the radial direction. That is, the overlapping portion of the first and second elongated holes does not affect the total length of the slide holes. The configuration of "overlapping in the radial direction" will be described in detail later with a specific example.

より好ましくは、上述した本発明の熱変色性筆記具において、前記軸筒を構成する一の前記部品に設けた前記第１の長孔に前記クリップ体の基部を挿入する工程と、前記軸筒を構成する他の前記部品に設けた前記第２の長孔に前記クリップ体の基部を挿入しつつ、他の前記部品を一の前記部品に連結させ、前記第２の長孔を前記第１の長孔に連通させて前記スライド孔を形成する工程と、を経て前記クリップ体を前記スライド孔に組み付けた構成とする。 More preferably, in the above-described thermochromic writing tool of the present invention, a step of inserting the base portion of the clip body into the first elongated hole provided in the one component constituting the shaft cylinder, and the shaft cylinder. While inserting the base of the clip body into the second elongated hole provided in the other constituent component, the other component is connected to the one component, and the second elongated hole is connected to the first elongated hole. The clip body is assembled into the slide hole through a step of communicating with the elongated hole to form the slide hole.

上記構成によれば、クリップ体をスライド孔に容易に挿入できることに加え、第１の長孔に挿入したクリップ体の基部をガイドにして、第１及び第２の長孔の位置合わせと、一の部品と他の部品の連結とを簡単に行うことができるようになる。 According to the above configuration, in addition to being able to easily insert the clip body into the slide hole, the positioning of the first and second long holes can be performed by using the base of the clip body inserted into the first long hole as a guide. It becomes possible to easily connect one part and other parts.

好ましくは、上述した本発明の熱変色性筆記具において、前記出没機構としてのカム機構を前記軸筒内に備え、前記カム機構には、交互に前後方向の異なる位置で係合可能なカム部及び突起を含み、前記クリップ体を前方へスライド操作することにより、前記カム部及び前記突起を交互に前後方向の異なる位置で係合させ、前記筆記体のペン先を交互に突出状態又は没入状態にする構成とする。 Preferably, in the above-described thermochromic writing instrument of the present invention, a cam mechanism as the infestation mechanism is provided in the barrel, and the cam mechanism is alternately engaged with a cam portion and a cam portion capable of engaging with the cam mechanism at different positions in the front-rear direction. By sliding the clip body forward including the protrusion, the cam portion and the protrusion are alternately engaged at different positions in the front-rear direction, and the pen tip of the cursive body is alternately brought into a protruding state or an immersed state. The configuration is to be used.

より好ましくは、前記出没機構として、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯及びカム溝と、前記筆記体の後方に回転可能に配置され、前記カム歯又は前記カム溝に交互に係合可能な複数の突条を有する回転部材と、前記クリップ体に設けられ、前記回転部材を回動させる複数の他のカム歯と、前記筆記体を後方に付勢する弾発体と、を前記軸筒内に備え、前記弾発体の付勢力に抗して、前記クリップ体を前方へスライド操作することにより、前記突条を前記カム歯又は前記カム溝に交互に係合させ、前記筆記体のペン先を交互に突出状態又は没入状態にする構成としてもよい。 More preferably, as the infestation mechanism, a plurality of cam teeth and cam grooves extending in the front-rear direction alternately arranged along the circumferential direction, and the cam teeth or the cam teeth rotatably arranged behind the cursive. A rotating member having a plurality of ridges that can be alternately engaged with the cam groove, a plurality of other cam teeth provided on the clip body to rotate the rotating member, and the cursive body are urged rearward. The elastic body and the elastic body are provided in the axle cylinder, and the clip body is slid forward against the urging force of the elastic body, whereby the protrusions are alternately provided with the cam teeth or the cam groove. The pen tips of the cursive may be alternately projected or immersed in the cursive.

このような構成によれば、カム機構を利用して、クリップ体を前方にスライド操作するだけでペン先を突出状態及び没入状態にすることができるダブルノック式の出没機構を構成することができ、本熱変色性筆記具の操作方法が極めて簡単となり、ユーザーが操作方法を容易に習得できるようになる。 According to such a configuration, it is possible to configure a double knock type infestation mechanism in which the pen tip can be brought into a protruding state and an immersed state simply by sliding the clip body forward by using the cam mechanism. , The operation method of this thermochromic writing instrument becomes extremely simple, and the user can easily learn the operation method.

好ましくは、上述した本熱変色性筆記具の出没機構において、前記クリップ体が、前記軸筒内に収容され且つ前後方向に延びる軸部を有し、前記軸部と前記回転部材とが、前後方向のあそびを有する状態で互いに係止される構成とする。 Preferably, in the above-mentioned infestation mechanism of the thermochromic writing tool, the clip body has a shaft portion that is accommodated in the shaft cylinder and extends in the front-rear direction, and the shaft portion and the rotating member are in the front-rear direction. It is configured to be locked to each other while having a play.

このような構成によれば、クリップ体の軸部と回転部材とが、前後方向のあそびを有した状態で係止されることにより、ペン先の突出状態（すなわち、カム歯と突条が前方で係合している場合）において、スライド孔の前方に移動したクリップ体の後方への移動が阻止される。その結果、ペン先の突出状態において摩擦操作を行う場合に、クリップ体の近傍を把持したとしても、クリップ体が不用意に移動することがなく、安定した摩擦操作が可能となる。 According to such a configuration, the shaft portion of the clip body and the rotating member are locked in a state of having play in the front-rear direction, so that the pen tip is in a protruding state (that is, the cam tooth and the ridge are forward. (When engaged with), the rearward movement of the clip body that has moved to the front of the slide hole is prevented. As a result, when the friction operation is performed with the pen tip protruding, even if the vicinity of the clip body is gripped, the clip body does not move carelessly, and a stable friction operation is possible.

好ましくは、上述した本熱変色性筆記具の出没機構において、前記スライド孔より前方の前記軸筒の外面に、前後方向に延びるガイド溝を形成し、前記クリップ体の前部内面に玉部を突設し、前記クリップ体の前後方向の移動に伴って、前記玉部が前記ガイド溝内を前後方向に摺動する構成とする。 Preferably, in the above-mentioned infestation mechanism of the thermochromic writing instrument, a guide groove extending in the front-rear direction is formed on the outer surface of the shaft cylinder in front of the slide hole, and the ball portion is projected on the inner surface of the front portion of the clip body. The clip body is provided so that the ball portion slides in the guide groove in the front-rear direction as the clip body moves in the front-rear direction.

上記構成によれば、クリップ体をスライド操作するときに、玉部がガイド溝に沿って摺動してクリップ体を前後方向にガイドするので、クリップ体の横方向（周方向）のぐらつきを防止することができる。また、衣類のポケットや手帳等の被挟持物をクリップ体に挟持させるときに、被挟持物が玉部とガイド溝との間に挟まれるので、クリップ体の挟持性能が向上する。 According to the above configuration, when the clip body is slid, the ball portion slides along the guide groove to guide the clip body in the front-rear direction, thereby preventing lateral (circumferential) wobbling of the clip body. can do. Further, when an object to be held such as a pocket of clothing or a notebook is sandwiched between the clip body, the object to be held is sandwiched between the ball portion and the guide groove, so that the holding performance of the clip body is improved.

好ましくは、上述した本熱変色性筆記具の出没機構において、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してなる構成とする。 Preferably, in the above-mentioned infestation mechanism of the thermochromic writing instrument, the friction portion is made of an elastic material, and a part of the friction portion is in contact with the clip body in the pen tip immersion state.

上記構成によれば、ペン先を突出状態からペン先没入状態にするときに、スライド溝の後方に移動したクリップ体が弾性材料からなる摩擦部に当接するので、このときに筆記体に加わる衝撃を緩和することができる。その結果、筆記体内のインキの逆流等やペン先からの空気の混入を防止することが可能となる。 According to the above configuration, when the pen tip is changed from the protruding state to the pen tip immersion state, the clip body moved to the rear of the slide groove comes into contact with the friction portion made of the elastic material, so that the impact applied to the writing body at this time. Can be alleviated. As a result, it is possible to prevent backflow of ink in the writing body and air from the pen tip.

上述した本熱変色性筆記具の出没機構において、前記摩擦部が弾性材料からなり、前記軸筒の後端又は前記後軸の後端部に圧入、係合、螺合、嵌合、接着、２色成形によって固着し、又は前記軸筒の全体もしくは前記後軸の全体を、前記摩擦部としての弾性材料で形成した構成とする。 In the above-mentioned infestation mechanism of the heat-discolorable writing tool, the friction portion is made of an elastic material and is press-fitted, engaged, screwed, fitted, bonded to the rear end of the axle or the rear end of the rear shaft. It is fixed by color molding, or the entire axle cylinder or the entire rear axle is formed of an elastic material as the friction portion.

上記構成によれば、軸筒の後端に摩擦部を十分強固に固定することができ、摩擦操作時に、摩擦部が後方へ移動したり、脱落したりすることがなく、摩擦部を用いた摩擦操作が安定したものとなる。 According to the above configuration, the friction portion can be sufficiently firmly fixed to the rear end of the axle cylinder, and the friction portion does not move backward or fall off during the friction operation, and the friction portion is used. The friction operation becomes stable.

以下、上述した本発明のより具体的な実施の形態＜１＞〜＜７＞について、図１〜３５の符号を引用して説明する。 Hereinafter, more specific embodiments <1> to <7> of the present invention described above will be described with reference to the reference numerals 1 to 35.

＜１＞第１の実施の形態に係る熱変色性筆記具１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、軸筒２内に前記筆記体９を後方に付勢された状態で前後方向に移動可能に収容し、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延びるスライド孔２１を設け、前記スライド孔２１から径方向外方にクリップ体７を突出させ、前記クリップ体７を前記スライド孔２１に沿って前後方向に移動可能に構成し、ペン先没入状態からクリップ体７を前方にスライド操作することによりペン先９１を軸筒２の前端孔３１から突出状態にし、ペン先突出状態からクリップ体７を操作することによりペン先９１を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を設けた構成となっている。 <1> The heat-discoloring writing tool 1 according to the first embodiment is a pen tip capable of storing the heat-discoloring ink inside the cursive 9 and ejecting the heat-discoloring ink to the front end of the cursive 9. A 91 is provided, and the cursive 9 is accommodated in the barrel 2 so as to be movable in the front-rear direction while being urged rearward, and the pen tip 91 of the cursive 9 can appear and disappear from the front end hole 31 of the barrel 2. A heat-discolorable writing tool configured in the above, in which a slide hole 21 extending in the front-rear direction is provided on the side wall of the barrel 2, the clip body 7 is projected outward in the radial direction from the slide hole 21, and the clip body 7 is formed. It is configured to be movable in the front-rear direction along the slide hole 21, and the pen tip 91 is projected from the front end hole 31 of the barrel 2 by sliding the clip body 7 forward from the pen tip immersion state. It is provided with a retracting mechanism that immerses the pen tip 91 in an immersed state by operating the clip body 7 from the protruding state, and the cursive of the heat-discoloring ink is rubbed against the rear end of the barrel 2 with the frictional heat generated at that time. The cursive is provided with a friction portion 10 capable of thermally discoloring the cursive.

前記第１の実施の形態に係る熱変色性筆記具１は、前記摩擦部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の実施の形態に係る熱変色性筆記具１は、ペン先出没の操作をするための操作部をクリップ体７に設け、摩擦部１０をクリップ体７（操作部）から独立させたことにより、ペン先９１を出没する際、クリップ体７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の実施の形態に係る熱変色性筆記具１は、軸筒２外面にクリップ体７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 embodiment, since the friction portion 10 is provided at the rear end of the shaft cylinder 2, the movement of the friction portion 10 to the rear is prevented during the friction operation. , Stable friction operation becomes possible by using the friction portion 10. Further, in the thermochromic writing instrument 1 according to the first embodiment, an operation unit for operating the pen tip infestation is provided on the clip body 7, and the friction portion 10 is made independent of the clip body 7 (operation unit). As a result, when the pen tip 91 appears and disappears, the clip body 7 is operated and the friction portion 10 is not operated, so that the friction portion 10 can be prevented from being soiled by hand stains or the like. Further, the heat-discoloring writing instrument 1 according to the first embodiment is compared with the conventional multi-core type side-slide type heat-discoloring writing instrument, although the clip body 7 is provided on the outer surface of the barrel 2. , There are few protruding parts, 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７は、軸筒２外面との間において衣類のポケットや手帳等の被挟持物に挟持可能なものである。尚、本発明において、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の後端に固定する構成であればよく、例えば、摩擦部１０が、ペン先出没操作以外の操作により軸筒２後端より出没する構成であってもよい。尚、本発明において、ペン先突出状態からクリップ体７を操作するとは、ペン先突出状態を解除する操作であり、例えば、クリップ体７を前方にスライド操作すること、クリップ体７を径方向内方に押圧操作すること、またはクリップ体７を回転操作すること等が挙げられる。尚、本発明で、摩擦操作時とは、摩擦部１０を用いて摩擦操作する時をいう。前記摩擦操作時において、ペン先突出状態またはペン先没入状態のいずれであってもよい。 In the present invention, the clip body 7 can be clipped between the outer surface of the barrel 2 and an object to be held such as a pocket of clothing or a notebook. In the present invention, the friction portion 10 may be configured to fix the friction portion 10 to the rear end of the barrel 2 at least during a friction operation. For example, the friction portion 10 is other than the pen tip infestation operation. It may be configured to appear and disappear from the rear end of the barrel 2 by operation. In the present invention, operating the clip body 7 from the pen tip protruding state is an operation of releasing the pen tip protruding state, for example, sliding the clip body 7 forward, and sliding the clip body 7 in the radial direction. Examples include pressing the clip body 7 toward one side and rotating the clip body 7. In the present invention, the time of friction operation means the time of friction operation using the friction portion 10. At the time of the friction operation, the pen tip may be in a protruding state or a pen tip immersed state.

＜２＞第２の実施の形態に係る熱変色性筆記具１は、前記第１の発明の筆記具１において、前記出没機構が、回転カム機構を用いたサイドスライド式出没機構であり、軸筒２内面に形成されたカム部４１と、該カム部４１に係合し且つ筆記体９の後端に当接する回転部材６と、該回転部材６に係合するカム歯７３ａ，７４ａを備えた前記クリップ体７と、前記軸筒２内に収容され且つ筆記体９を後方に付勢する弾発体８とからなり、ペン先突出操作及びペン先没入操作の何れもがクリップ体７を前方にスライド操作するタイプである構成となっている。 <2> The thermochromic writing instrument 1 according to the second embodiment is the writing instrument 1 of the first invention, wherein the infestation mechanism is a side slide type infestation mechanism using a rotary cam mechanism, and the axle tube 2 The cam portion 41 formed on the inner surface, a rotating member 6 that engages with the cam portion 41 and abuts on the rear end of the cursive body 9, and cam teeth 73a, 74a that engage with the rotating member 6. It is composed of a clip body 7 and an elastic body 8 housed in the barrel 2 and urging the cursive body 9 backward, and both the pen tip protruding operation and the pen tip immersion operation move the clip body 7 forward. It is a type that operates by sliding.

前記第２の実施の形態に係る熱変色性筆記具１は、出没機構が、回転カム機構を用いたサイドスライド式出没機構であり、ペン先突出操作及びペン先没入操作の何れもがクリップ体７を前方にスライド操作するタイプ（いわゆるダブルノック式の出没機構）であるため、操作方法が簡単であり、ユーザーが操作方法を容易に習得できる。 The thermochromic writing instrument 1 according to the second embodiment has a side-slide type indentation mechanism in which the infestation mechanism uses a rotary cam mechanism, and both the pen tip protrusion operation and the pen tip intrusion operation are clip bodies 7. Since it is a type that slides forward (so-called double knock type haunting mechanism), the operation method is simple and the user can easily learn the operation method.

＜３＞第３の実施の形態に係る熱変色性筆記具１は、前記第１または第２の発明の熱変色性筆記具１において、前記軸筒２が、前軸３と、該前軸３の後端部に連結される中間軸４と、該中間軸４の後端部に連結される後軸５とからなり、前記前軸３の前端にペン先９１が出没可能な前端孔３１を設け、前記中間軸４の内面にカム部４１を設け、中間軸４の後端部に、後方に開放され且つ前後方向に延びる第１の長孔４４を設け、前記後軸５の前端部に、前方に開放され且つ前後方向に延びる第２の長孔５１を設け、前記中間軸４の後端部と前記後軸５の前端部とを、第１の長孔４４と第２の長孔５１とが連通するよう連結し、前記第１の長孔４４と前記第２の長孔５１とにより軸筒２の側壁に前記スライド孔２１を形成し、前記後軸５の後端外面に摩擦部１０を固定した構成となっている。 <3> The heat-discolorable writing tool 1 according to the third embodiment is the heat-discolorable writing tool 1 of the first or second invention, wherein the axle tube 2 is a front shaft 3 and the front shaft 3. An intermediate shaft 4 connected to the rear end portion and a rear shaft 5 connected to the rear end portion of the intermediate shaft 4 are provided, and a front end hole 31 on which the pen tip 91 can appear and disappear is provided at the front end of the front shaft 3. A cam portion 41 is provided on the inner surface of the intermediate shaft 4, a first elongated hole 44 that is opened rearward and extends in the front-rear direction is provided at the rear end portion of the intermediate shaft 4, and the front end portion of the rear shaft 5 is provided. A second elongated hole 51 that is opened forward and extends in the front-rear direction is provided, and the rear end portion of the intermediate shaft 4 and the front end portion of the rear shaft 5 are formed into a first elongated hole 44 and a second elongated hole 51. The slide hole 21 is formed on the side wall of the axle cylinder 2 by the first elongated hole 44 and the second elongated hole 51, and a friction portion is formed on the outer surface of the rear end of the rear shaft 5. It has a structure in which 10 is fixed.

前記第３の実施の形態に係る熱変色性筆記具１は、後方に開放された第１の長孔４４と前方に開放された第２の長孔５１とによりスライド孔２１を形成したことによって、前記中間軸４と前記後軸５とを連結する際（即ちスライド孔２１を形成する際）に、クリップ体７を第１の長孔４４と第２の長孔５１とに挿入でき、クリップ体７をスライド孔２１に容易に挿入することができ、クリップ体７と軸筒２との容易な挿入組立が可能となる。 The thermochromic writing tool 1 according to the third embodiment has a slide hole 21 formed by a first elongated hole 44 opened rearward and a second elongated hole 51 opened forward. When connecting the intermediate shaft 4 and the rear shaft 5 (that is, when forming the slide hole 21), the clip body 7 can be inserted into the first elongated hole 44 and the second elongated hole 51, and the clip body can be inserted. 7 can be easily inserted into the slide hole 21, and the clip body 7 and the barrel 2 can be easily inserted and assembled.

＜４＞第４の実施の形態に係る熱変色性筆記具１は、前記第３の発明の熱変色性筆記具１において、前記中間軸４の側壁と前記後軸５の側壁とを互いに径方向に重なるように連結し、前記第１の長孔４４と前記第２の長孔５１とを径方向に連通させた構成となっている。 <4> The thermochromic writing instrument 1 according to the fourth embodiment is the thermochromic writing instrument 1 of the third invention, in which the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5 are radially oriented with each other. The first elongated hole 44 and the second elongated hole 51 are connected in an overlapping manner so as to be overlapped with each other in the radial direction.

前記第４の実施の形態に係る熱変色性筆記具１は、前記中間軸４の側壁と前記後軸５の側壁とを互いに径方向に重なるように連結し、前記第１の長孔４４と前記第２の長孔５１とを径方向に連通させたことにより、軸筒２全体が不必要に長くなることを回避できる。尚、本発明で、前記中間軸４の側壁と前記後軸５の側壁とを互いに径方向に重なるように連結するとは、例えば、中間軸４の側壁外面と後軸５の側壁内面とを径方向に重なるように連結（例えば嵌合や螺合）させる構成、または、中間軸４の側壁内面と後軸５の側壁外面とを径方向に重なるように連結（例えば嵌合や螺合）させる構成が挙げられる。前記中間軸４の側壁と前記後軸５の側壁とを互いに径方向に重なるように連結する構成は、少なくとも、前記中間軸４の側壁の一部と前記後軸５の側壁の一部とが互いに径方向に重なるように連結する構成であればよい。 In the thermochromic writing instrument 1 according to the fourth embodiment, the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5 are connected so as to overlap each other in the radial direction, and the first elongated hole 44 and the said By communicating with the second elongated hole 51 in the radial direction, it is possible to prevent the entire shaft cylinder 2 from becoming unnecessarily long. In the present invention, connecting the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5 so as to overlap each other in the radial direction means that, for example, the outer surface of the side wall of the intermediate shaft 4 and the inner surface of the side wall of the rear shaft 5 are diametered. A configuration in which they are connected so as to overlap in the direction (for example, fitting or screwing), or a configuration in which the inner surface of the side wall of the intermediate shaft 4 and the outer surface of the side wall of the rear shaft 5 are connected so as to overlap in the radial direction (for example, fitting or screwing). The configuration can be mentioned. In the configuration in which the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5 are connected so as to overlap each other in the radial direction, at least a part of the side wall of the intermediate shaft 4 and a part of the side wall of the rear shaft 5 are connected. Any configuration may be used as long as they are connected so as to overlap each other in the radial direction.

＜５＞第５の実施の形態に係る熱変色性筆記具１は、前記第２、第３または第４の発明の熱変色性筆記具１において、前記クリップ体７が、前記軸筒２内に収容され且つ前後方向に延びる軸部７３を有し、前記軸部７３と前記回転部材６とが、互いに回転可能且つ互いに前後方向のあそびを有した状態で前後方向に係止される構成となっている。 <5> In the thermochromic writing instrument 1 according to the fifth embodiment, in the thermochromic writing instrument 1 of the second, third or fourth invention, the clip body 7 is housed in the shaft cylinder 2. It has a shaft portion 73 extending in the front-rear direction, and the shaft portion 73 and the rotating member 6 are locked in the front-rear direction in a state where they can rotate with each other and have play in the front-rear direction with each other. There is.

前記第５の実施の形態に係る熱変色性筆記具１は、前記クリップ体７が、前記軸筒２内に収容され且つ前後方向に延びる軸部７３を有し、前記軸部７３と前記回転部材６とが、互いに回転可能且つ互いに前後方向のあそびを有した状態で前後方向に係止されることにより、ペン先突出状態において、回転部材６がカム部４１のカム歯４１ａに係止され、回転部材６の後方移動が阻止されるとともに、クリップ体７の不用意な前後方向の移動が抑えられる。その結果、ペン先突出状態でクリップ体７の近傍を把持しても、安定した摩擦操作が可能となる。 The thermochromic writing tool 1 according to the fifth embodiment has a shaft portion 73 in which the clip body 7 is housed in the shaft cylinder 2 and extends in the front-rear direction, and the shaft portion 73 and the rotating member. 6 and 6 are locked in the front-rear direction in a state where they can rotate with each other and have play in the front-rear direction with each other, so that the rotating member 6 is locked with the cam teeth 41a of the cam portion 41 in the pen tip protruding state. The backward movement of the rotating member 6 is prevented, and the careless movement of the clip body 7 in the front-rear direction is suppressed. As a result, stable friction operation is possible even if the vicinity of the clip body 7 is gripped with the pen tip protruding.

＜６＞第６の実施の形態に係る熱変色性筆記具１は、前記第１乃至第５の発明の何れかの熱変色性筆記具１において、前記スライド孔２１より前方の前記軸筒２の外面に、前後方向に延びるガイド溝４８を形成し、前記クリップ体７の前部内面に玉部７１ａを突設し、前記クリップ体７の前後方向の移動に伴って前記ガイド溝４８内を前記玉部７１ａが前後方向に摺動する構成となっている。 <6> The thermochromic writing instrument 1 according to the sixth embodiment is the outer surface of the shaft cylinder 2 in front of the slide hole 21 in the thermochromic writing instrument 1 according to any one of the first to fifth inventions. A guide groove 48 extending in the front-rear direction is formed therein, a ball portion 71a is projected from the inner surface of the front portion of the clip body 7, and the ball is formed in the guide groove 48 as the clip body 7 moves in the front-rear direction. The portion 71a is configured to slide in the front-rear direction.

前記第６の実施の形態に係る熱変色性筆記具１は、前記スライド孔２１より前方の前記軸筒２の外面に、前後方向に延びるガイド溝４８を形成し、前記クリップ体７の前部内面に玉部７１ａを突設し、前記クリップ体７の前後方向の移動に伴って前記ガイド溝４８内を前記玉部７１ａが前後方向に摺動することにより、クリップ体の挟持性能が向上するとともにクリップ体７の横方向（周方向）のぐらつきを防止できる。 The thermochromic writing tool 1 according to the sixth embodiment forms a guide groove 48 extending in the front-rear direction on the outer surface of the shaft cylinder 2 in front of the slide hole 21, and forms a front inner surface of the clip body 7. The ball portion 71a is provided so as to project in the front-rear direction, and the ball portion 71a slides in the guide groove 48 in the front-rear direction as the clip body 7 moves in the front-rear direction, thereby improving the holding performance of the clip body. It is possible to prevent the clip body 7 from wobbling in the lateral direction (circumferential direction).

＜７＞第７の実施の形態に係る熱変色性筆記具１は、前記第１乃至第６の発明の何れかの熱変色性筆記具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７に当接してなる構成となっている。 <7> In the thermochromic writing instrument 1 according to the seventh embodiment, in the thermochromic writing instrument 1 according to any one of the first to sixth aspects, the friction portion 10 is made of an elastic material, and the friction portion is formed. A part of 10 is in contact with the clip body 7 in the pen tip immersion state.

前記第７の実施の形態に係る熱変色性筆記具１は、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７に当接してなることにより、ペン先突出状態からペン先没入状態にする際、弾発体８の後方付勢により筆記体９及びクリップ体７が後方移動し、クリップ体７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。 In the thermochromic writing instrument 1 according to the seventh embodiment, the friction portion 10 is made of an elastic material, and a part of the friction portion 10 is in contact with the clip body 7 in a pen tip immersion state. When changing from the pen tip protruding state to the pen tip immersion state, the cursive body 9 and the clip body 7 move backward due to the rearward bias of the elastic body 8, and the clip body 7 and the friction portion 10 made of an elastic material come into contact with each other. At that time, the impact applied to the cursive 9 can be alleviated. As a result, it is possible to prevent backflow of ink in the cursive 9 and air from the pen tip 91.

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 heat-discolorable writing instrument of the present invention enables stable friction operation using a friction part, can prevent the friction part from being soiled by hand stains, etc., and also increases the degree of freedom in appearance design and is smart. You can get the appearance.

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 pen tip 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 protruding state of FIG. 図１の縦断面図である。It is a vertical sectional view of FIG. 図１の前軸の拡大縦断面図である。It is an enlarged vertical sectional view of the front shaft of FIG. 図１の中間軸の拡大縦断面図及び回転部材の拡大側面図である。It is an enlarged vertical sectional view of the intermediate shaft of FIG. 1 and an enlarged side view of a rotating member. 図１の後軸の拡大縦断面図及び摩擦部の拡大側面図である。FIG. 1 is an enlarged vertical sectional view of the rear axle and an enlarged side view of the friction portion of FIG. 図１のクリップ体の拡大側面図である。It is an enlarged side view of the clip body of FIG. 本発明のクリップ体の他の実施の形態を示す拡大縦断面図である。It is an enlarged vertical sectional view which shows the other embodiment of the clip body of this invention. 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 discoloration behavior of a thermochromic ink. 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１１の正面図である。It is a front view of FIG. 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 protruding state of FIG. 図１１の縦断面図である。It is a vertical sectional view of FIG. 図１４のＡ−Ａ線拡大断面図である。FIG. 14 is an enlarged cross-sectional view taken along the line AA of FIG. 図１４のＢ−Ｂ線拡大断面図である。FIG. 14 is an enlarged cross-sectional view taken along the line BB of FIG. 図１１のペン先突出状態の縦断面図である。FIG. 11 is a vertical cross-sectional view of the pen tip protruding state of FIG. 図１１の前軸の拡大縦断面図である。It is an enlarged vertical sectional view of the front shaft of FIG. 図１１の中間軸の拡大正面図である。It is an enlarged front view of the intermediate shaft of FIG. （ａ）が図１９のＣ−Ｃ線断面図、（ｂ）が図１９のＤ−Ｄ線断面図、（ｃ）が図１９のＥ−Ｅ線断面図、（ｄ）が図１９のＦ−Ｆ線断面図である。(A) is a sectional view taken along line CC of FIG. 19, (b) is a sectional view taken along line DD of FIG. 19, (c) is a sectional view taken along line EE of FIG. 19, and (d) is an F of FIG. FIG. 5 is a sectional view taken along line F. 図１１の中間軸の拡大縦断面図である。It is an enlarged vertical sectional view of the intermediate axis of FIG. 図１１の後軸の拡大正面図である。It is an enlarged front view of the rear axle of FIG. 図２２のＧ−Ｇ線断面図である。FIG. 22 is a cross-sectional view taken along the line GG of FIG. 図１１の後軸の拡大縦断面図である。It is an enlarged vertical sectional view of the rear axle of FIG. 図１１の後軸と摩擦部との取付状態を示す拡大縦断面図である。It is an enlarged vertical sectional view which shows the attachment state of the rear shaft and the friction part of FIG. 図１１のクリップ体を省略した要部拡大正面図である。It is an enlarged front view of the main part which omitted the clip body of FIG. 図１１のクリップ体の拡大縦断面図である。It is an enlarged vertical sectional view of the clip body of FIG. 図１１のクリップ体の円筒体を除いたクリップ体主要部の拡大側面図である。It is an enlarged side view of the main part of the clip body excluding the cylindrical body of the clip body of FIG. 図１１のクリップ体の円筒体の拡大正面図である。It is an enlarged front view of the cylindrical body of the clip body of FIG. 図１１のクリップ体の円筒体の拡大平面図である。It is an enlarged plan view of the cylindrical body of the clip body of FIG. 図１１のクリップ体の円筒体の拡大縦断面図である。It is an enlarged vertical sectional view of the cylindrical body of the clip body of FIG. 図１１の回転部材の拡大正面図である。It is an enlarged front view of the rotating member of FIG. 図１１の回転部材の拡大縦断面図である。It is an enlarged vertical sectional view of the rotating member of FIG. 図１１のクリップ体主要部、円筒体、回転部材、中間軸、及び後軸を示す分解図である。It is an exploded view which shows the main part of the clip body, the cylindrical body, the rotating member, the intermediate shaft, and the rear shaft of FIG. 図１１のペン先突出状態（図１７）の要部拡大縦断面図である。11 is an enlarged vertical cross-sectional view of a main part of the pen tip protruding state (FIG. 17) of FIG.

＜第１の実施の形態＞
図１及び図９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内に収容される筆記体９と、該筆記体９のペン先を軸筒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。 <First Embodiment>
1 and 9 show embodiments of the present invention. In the thermochromic writing instrument 1 of the present embodiment, the shaft cylinder 2, the writing body 9 housed in the shaft cylinder 2, and the pen tip of the writing body 9 can be freely retracted from the front end hole 31 of the shaft cylinder 2. It is equipped with a haunting mechanism.

・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９２と、該インキ収容管９２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 The cursive 9 includes a pen tip 91, an ink containing tube 92 in which the pen tip 91 is press-fitted and fixed to a front end opening, and a heat-discolorable ink filled in the ink containing tube 92. It is composed of a follower (for example, a high-viscosity fluid) that is filled in the rear end of the heat-discoloring ink and advances with the consumption of the heat-discoloring ink.

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９２の後端開口部に、インキ収容管９２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９１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９１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。 The pen tip 91 may be composed of, for example, only a metal ballpoint pen tip having a ball rotatably held at the front end, or a synthetic resin pen tip holder holding the rear outer surface of the ballpoint pen tip. It may be. Further, a tail plug having a ventilation hole through which the ink storage tube 92 and the outside can be ventilated is attached to the rear end opening of the ink storage tube 92. Inside the pen tip 91, a spring that presses the ball at the front end forward is housed. The spring has a configuration in which a rod portion is provided at the front end portion of the compression coil spring.
The front end of the rod portion is in contact with the rear surface of the ball. When not writing, the forward urging of the spring causes the ball to come into close contact with the inner surface of the inwardly facing front end edge of the front end of the ballpoint pen tip, thereby preventing ink leakage and ink evaporation from the front end of the pen tip 91.

・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。 -Axle cylinder The axle 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.

図５に前軸３を示す。前記前軸３は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体からなる先細円筒状の本体３ａと、該本体３ａ外面に設けられる弾性材料からなる把持部３ｂとからなる。前記把持部３ｂ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３２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。 FIG. 5 shows the front axle 3. The front shaft 3 is composed of a tapered cylindrical main body 3a made of a molded body of a synthetic resin (for example, polycarbonate resin) and a grip portion 3b made of an elastic material provided on the outer surface of the main body 3a. The grip portion 3b is provided by two-color molding or mounting. The diameter of the rear end portion of the front shaft 3 is reduced, and a male screw portion 32 is formed on the outer surface thereof. A front end hole 31 is formed in the front end of the front shaft 3 in the front-rear direction.

図６に中間軸４を示す。前記中間軸４は、円筒状の合成樹脂（例えば、ポリカーボネート樹脂）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４６が形成される。前記メネジ部４６に前記前軸３のオネジ部３２が螺合可能である。前記中間軸４の後端部には、縮径部４３が一体に形成される。前記縮径部４３には、前端が閉鎖され且つ後端が開放された、前後方向に延びる第１の長孔４４が形成される。さらに、前記縮径部４３の外面には外向突起４５が一体に形成される。前記縮径部４３より前方の前記中間軸４の内面には、段部４２が一体に形成される。前記段部４２よりも前方の前記中間軸４の内面（前記中間軸４の第１の長孔４４よりも前方の内面）には、カム部４１が一体に形成される。また、前記段部４２は、前記カム部４１の後方且つ第１の長孔４４の前方（即ちカム部４１と第１の長孔４４との間）の中間軸４の内面に一体に形成される。また、前記中間軸４の外面には、係止突起４７が一体に形成される。ペン先没入状態において、前記係止突起４７とクリップ体７の玉部７１ａとの間でポケット等の被挟持物が挟持可能である。 FIG. 6 shows the intermediate axis 4. The intermediate shaft 4 is made of a molded body of a cylindrical synthetic resin (for example, a polycarbonate resin). A female screw portion 46 is formed on the inner surface of the front end portion of the intermediate shaft 4. The male screw portion 32 of the front shaft 3 can be screwed into the female screw portion 46. A reduced diameter portion 43 is integrally formed at the rear end portion of the intermediate shaft 4. The reduced diameter portion 43 is formed with a first elongated hole 44 extending in the front-rear direction with the front end closed and the rear end open. Further, an outward protrusion 45 is integrally formed on the outer surface of the reduced diameter portion 43. A step portion 42 is integrally formed on the inner surface of the intermediate shaft 4 in front of the reduced diameter portion 43. A cam portion 41 is integrally formed on the inner surface of the intermediate shaft 4 in front of the step portion 42 (inner surface in front of the first elongated hole 44 of the intermediate shaft 4). Further, the step portion 42 is integrally formed on the inner surface of the intermediate shaft 4 behind the cam portion 41 and in front of the first elongated hole 44 (that is, between the cam portion 41 and the first elongated hole 44). To. Further, a locking projection 47 is integrally formed on the outer surface of the intermediate shaft 4. In the pen tip immersion state, an object to be held such as a pocket can be sandwiched between the locking projection 47 and the ball portion 71a of the clip body 7.

図７に後軸５を示す。前記後軸５は、円筒状の合成樹脂（例えば、ポリカーボネート樹脂）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。それにより、前記後軸５の後端外面に摩擦部１０が固定される。また、前記後軸５の内面には、内向突起５３が一体に形成される。前記第２の長孔５１の幅寸法は、前記第１の長孔４４の幅寸法と等しく設定され、それにより、スライド孔２１に沿ってクリップ体７の前後方向のスムーズな移動が可能となる。 FIG. 7 shows the rear axle 5. The rear shaft 5 is made of a molded body of a cylindrical synthetic resin (for example, a polycarbonate resin). A second elongated hole 51 extending in the front-rear direction is formed on the side wall of the front end portion of the rear shaft 5 so that the front end is open and the rear end is closed. Further, a mounting hole 52 is formed in the rear end of the rear shaft 5 in the front-rear direction. A friction portion 10 made of an elastic material is press-fitted into the mounting hole 52. As a result, the friction portion 10 is fixed to the outer surface of the rear end of the rear shaft 5. Further, an inward projection 53 is integrally formed on the inner surface of the rear shaft 5. The width dimension of the second elongated hole 51 is set to be equal to the width dimension of the first elongated hole 44, whereby the clip body 7 can move smoothly in the front-rear direction along the slide hole 21. ..

図８にクリップ体７を示す。前記クリップ体７は、前後方向に延びるクリップ本体７１と、該クリップ本体７１の後部に一体に連設される基部７２と、該基部７２と一体に連設され且つ基部７２より前方に延びる軸部７３とからなる。前記クリップ体７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。前記クリップ本体７１は、裏面に玉部７１ａが突設される。前記軸部７３の前端には、カム歯７３ａが一体に形成される。 FIG. 8 shows the clip body 7. The clip body 7 has a clip main body 71 extending in the front-rear direction, a base portion 72 integrally connected to the rear portion of the clip main body 71, and a shaft portion integrally connected to the base portion 72 and extending forward from the base portion 72. It consists of 73. The clip body 7 is obtained by molding a synthetic resin (for example, a polycarbonate resin). A ball portion 71a is projected from the back surface of the clip body 71. A cam tooth 73a is integrally formed at the front end of the shaft portion 73.

・クリップ体の組立
前記クリップ体７の組立について説明する。前記中間軸４の第１の長孔４４の後端開放部より、該第１の長孔４４内にクリップ体７の基部７２を挿入するとともに、クリップ体７の軸部７３を中間軸４内に挿入する。その後、中間軸４の第１の長孔４４と後軸５の第２の長孔５１とを径方向に連通させるように（径方向に重なるように）、前記後軸５の内面を前記中間軸４の縮径部４３の外面に嵌合させるとともに、クリップ体７の基部７２を、第２の長孔５１の前端開放部より、該第２の長孔５１に挿入する。それにより、前記中間軸４と前記後軸５とが連結され、前記第１の長孔４４と第２の長孔５１とにより、前後方向に延びるスライド孔２１が形成されるとともに、前記スライド孔２１より径方向外方にクリップ体７（クリップ本体７１及び基部７２の一部）が突出され、前記クリップ体７がスライド孔２１に沿って前後方向にスライド可能（前後方向に摺動可能）に構成される。尚、このとき、前記中間軸４の縮径部４３外面の外向突起４５と後軸５の内面の内向突起５３が乗り越え係合される。 -Assembly of the clip body The assembly of the clip body 7 will be described. The base portion 72 of the clip body 7 is inserted into the first elongated hole 44 from the rear end opening portion of the first elongated hole 44 of the intermediate shaft 4, and the shaft portion 73 of the clip body 7 is inserted into the intermediate shaft 4. Insert in. After that, the inner surface of the rear shaft 5 is connected to the middle so that the first long hole 44 of the intermediate shaft 4 and the second long hole 51 of the rear shaft 5 are communicated in the radial direction (so as to overlap in the radial direction). The base portion 72 of the clip body 7 is inserted into the second elongated hole 51 from the front end open portion of the second elongated hole 51 while being fitted to the outer surface of the reduced diameter portion 43 of the shaft 4. As a result, the intermediate shaft 4 and the rear shaft 5 are connected, and the first elongated hole 44 and the second elongated hole 51 form a slide hole 21 extending in the front-rear direction, and the slide hole 21 is formed. The clip body 7 (a part of the clip body 71 and the base portion 72) protrudes outward in the radial direction from 21 so that the clip body 7 can slide in the front-rear direction (sliding in the front-rear direction) along the slide hole 21. It is composed. At this time, the outward protrusion 45 on the outer surface of the reduced diameter portion 43 of the intermediate shaft 4 and the inward protrusion 53 on the inner surface of the rear shaft 5 get over and engage with each other.

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の後端に常時固定される。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 always fixed to the rear end of the axle cylinder 2. Further, the front shaft 3 and the intermediate shaft 4 are detachably connected by screwing, whereby the cursive body 9 can be exchanged.

・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４内面に形成されたカム部４１と、該カム部４１に係合し且つ筆記体９の後端に当接する回転部材６と、該回転部材６に係合し且つスライド孔２１より径方向外方に突出するクリップ体７と、軸筒２内に収容され且つ筆記体９を後方に付勢する弾発体８（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クリップ体７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６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。 -Infestation mechanism The infestation mechanism is a side-slide type infestation mechanism using a rotary cam mechanism. The infestation mechanism engages with a cam portion 41 formed on the inner surface of the intermediate shaft 4, a rotating member 6 that engages with the cam portion 41 and abuts on the rear end of the cursive body 9, and the rotating member 6. The clip body 7 projects radially outward from the slide hole 21, and the elastic body 8 (for example, a compression coil spring) housed in the barrel 2 and urging the cursive body 9 rearward. The infestation mechanism of the present embodiment is a double knock type in which both the pen tip protrusion operation and the pen tip immersion operation slide the clip body 7 forward. The rotating member 6 is obtained by molding a synthetic resin (for example, polyacetal resin).

前記カム部４１は、前方に突出する鋸歯状の複数のカム歯４１ａと、該カム歯４１ａ間に形成される、前後方向に延びる複数のカム溝４１ｂとを備える。前記回転部材６は、その外面に前後方向に延びる複数本（例えば４本）の突条６１を備え、該突条６１が、カム部４１のカム歯４１ａ及びカム部４１のカム溝４１ｂと係合される。前記クリップ体７の軸部７３の前端には、回転部材６の突条６１の後端と係合するカム歯７３ａが一体に形成される。 The cam portion 41 includes a plurality of serrated cam teeth 41a projecting forward, and a plurality of cam grooves 41b formed between the cam teeth 41a and extending in the front-rear direction. The rotating member 6 is provided with a plurality of (for example, four) ridges 61 extending in the front-rear direction on the outer surface thereof, and the ridges 61 engage with the cam teeth 41a of the cam portion 41 and the cam groove 41b of the cam portion 41. Will be combined. A cam tooth 73a that engages with the rear end of the ridge 61 of the rotating member 6 is integrally formed at the front end of the shaft portion 73 of the clip body 7.

・ペン先の出没
ペン先没入状態からクリップ体７を前方に、弾発体８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７の軸部７３のカム歯７３ａによって回転部材６が前方に押圧され、前記回転部材６の突条６１がカム溝４１ｂに沿って前方に移動するに伴って、前記回転部材６が筆記体９の後端を前方に押圧し、ペン先９１が前端孔３１より外部に突出される。このとき、前記軸部７３のカム歯７３ａと前記回転部材６の突条６１との当接によって回転部材６がカム部４１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６の突条６１がカム部４１のカム歯４１ａに係合され、ペン先突出状態が維持される。 -Infestation of the pen tip When the clip body 7 is slid forward from the pen tip immersion state and against the rearward bias by the elastic body 8, the rotating member 6 is moved forward by the cam teeth 73a of the shaft portion 73 of the clip body 7. The rotating member 6 presses the rear end of the cursive 9 forward as the ridge 61 of the rotating member 6 moves forward along the cam groove 41b, and the pen tip 91 presses the front end hole. It is projected to the outside from 31. At this time, the rotating member 6 rotates by a certain angle with respect to the cam portion 41 due to the contact between the cam teeth 73a of the shaft portion 73 and the ridge 61 of the rotating member 6. As a result, the ridge 61 of the rotating member 6 is engaged with the cam tooth 41a of the cam portion 41, and the pen tip protruding state is maintained.

ペン先突出状態からクリップ体７を前方にスライド操作すると、クリップ体７の軸部７３が回転部材６を前方に押圧し、前記軸部７３のカム歯７３ａと前記回転部材６の突条６１との当接によって回転部材６がカム部４１に対して一定角度だけ回転する。それによって、前記突条６１とカム部４１のカム歯４１ａとの係合状態が解除され、弾発体８による後方付勢により、前記突条６１がカム部４１のカム溝４１ｂに沿って後方に移動する。前記回転部材６が後方に移動することに伴って、筆記体９が後方に移動し、ペン先没入状態となる。 When the clip body 7 is slid forward from the pen tip protruding state, the shaft portion 73 of the clip body 7 presses the rotating member 6 forward, and the cam teeth 73a of the shaft portion 73 and the ridge 61 of the rotating member 6 The rotating member 6 rotates by a certain angle with respect to the cam portion 41 due to the contact between the two. As a result, the engagement state between the ridge 61 and the cam tooth 41a of the cam portion 41 is released, and the ridge 61 is rearward along the cam groove 41b of the cam portion 41 due to the rearward bias by the elastic body 8. Move to. As the rotating member 6 moves backward, the cursive 9 moves backward, and the pen tip is immersed.

前記摩擦部１０は、前記クリップ体７の前後方向の移動に連動せず、後軸５（軸筒２）の後端外面に固定される。前記摩擦部１０は、クリップ体７と独立して設けられる。 The friction portion 10 is fixed to the outer surface of the rear end of the rear shaft 5 (axle cylinder 2) without being interlocked with the movement of the clip body 7 in the front-rear direction. The friction portion 10 is provided independently of the clip body 7.

・クリップ体の他の例
図９にクリップ体７の他の実施の形態を示す。本実施の形態の図８のクリップ体７と異なる点は、カム歯７４ａを有する円筒体７４をクリップ体７の軸部７３に取り付けた点であり、他の構成及び作用効果は図１乃至図８の実施の形態と同様であるため、説明を省略する。前記円筒体７４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。 -Other Examples of Clip Body FIG. 9 shows another embodiment of the clip body 7. The difference from the clip body 7 of FIG. 8 of the present embodiment is that the cylindrical body 74 having the cam teeth 74a is attached to the shaft portion 73 of the clip body 7, and other configurations and effects are shown in FIGS. Since it is the same as the embodiment of 8, the description thereof will be omitted. The cylindrical body 74 is obtained by molding a synthetic resin (for example, polyacetal resin).

・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の後端部外面もしくは後軸５の後端部外面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 or an SBS resin (styrene-butadiene-styrene copolymer). , SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine-based resin, chloroprene resin, nitrile resin, polyester-based resin, ethylene propylene diene rubber (EPDM) and the like. The elastic synthetic resin constituting the friction portion 10 is a low-wear elastic material in which almost no wear residue (eraser) is generated during friction, as compared with a material made of a highly wear-resistant elastic material (for example, an eraser). It is preferably composed of. Further, the friction portion 10 may be provided at least on the outer surface of the rear end portion of the axle cylinder 2, and for example, the friction portion 10 made of an elastic material is provided on the outer surface of the rear end portion of the axle cylinder 2 or the outer surface of the rear end portion of the rear shaft 5. 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 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。 -Heat-changing ink In the present embodiment, the heat-changing ink is preferably a lossless heat-changing ink. The reversible thermochromic ink is a heat-decoloring type that decolorizes by heating from a color-developing state, a color memory-holding type that alternately stores a color-developing state or a decoloring state in a specific temperature range, or a decoloring state. Various types such as a heating color-developing type that develops color by heating and returns to a decolorized state by cooling from the color-developed state can be configured 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。 Further, the coloring material contained in the reversible thermochromic ink is a conventionally known (a) electron-donating color-developing organic compound, (b) electron-accepting compound, and (c) the color reaction of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least three essential components of a reaction medium for determining the occurrence temperature of the above is encapsulated in a microcapsule is preferably used.

本実施の形態では、図１０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１０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. 10, the shape of the curve plotting the change in coloring density due to the temperature change is higher than the discoloration temperature range, contrary to the case where the temperature is raised from the lower temperature side than the discoloration temperature range. The color changes by following a different path from the case of descending from the side, and the color is developed in the low temperature range below the complete color development temperature (t 1 ), or the color is decolorized in the high temperature range above the complete decolorization temperature (t 4 ). It is preferable to apply a color memory retention type thermochromic ink whose state can be stored in a specific temperature range [a temperature range between t 2 to t 3 (substantial two-phase holding temperature range)]. In FIG. 10, ΔH indicates a temperature width (that is, a hysteresis width) indicating the degree of hysteresis. If the value of ΔH is small, only one of the two states before and after discoloration can exist. When the value of ΔH is large, it becomes easy to maintain each state before and after discoloration.

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（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 discoloration temperature due to the frictional heat of the friction portion 10 of the heat-discoloring ink is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in the present embodiment, the high temperature side discoloration point [complete decolorization temperature (t 4 )] is set in the range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration. It is effective to set the point [complete color development temperature (t 1 )] in the range of -30 ° C to + 20 ° C (preferably -30 ° C to + 10 ° C). As a result, it is possible to effectively maintain the color exhibited in the normal state (daily living temperature range), and it is possible to easily discolor the handwriting by the reversible thermochromic ink 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、前記摩擦部１０を軸筒２の後端外面に固定したことにより、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、本実施の形態の熱変色性筆記具１は、ペン先出没の操作をするための操作部をクリップ体７に設け、摩擦部１０をクリップ体７（操作部）から独立させたことにより、ペン先９１を出没する際、クリップ体７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、本実施の形態の熱変色性筆記具１は、軸筒２外面にクリップ体７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 heat-discoloring writing instrument 1 of the present embodiment, since the friction portion 10 is fixed to the outer surface of 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 is possible by using 10. Further, in the thermochromic writing tool 1 of the present embodiment, an operation portion for operating the pen tip infestation is provided on the clip body 7, and the friction portion 10 is made independent of the clip body 7 (operation portion). Since the clip body 7 is operated and the friction portion 10 is not operated when the pen tip 91 appears and disappears, it is possible to prevent the friction portion 10 from becoming dirty with hand stains or the like. Further, the heat-discoloring writing instrument 1 of the present embodiment has a protruding portion as compared with the conventional multi-core type side-slide type heat-discoloring writing instrument, although the clip body 7 is provided on the outer surface of the barrel 2. There are few, 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、出没機構が、回転カム機構を用いたサイドスライド式出没機構であり、ペン先突出操作及びペン先没入操作の何れもがクリップ体７を前方にスライド操作するタイプ（いわゆるダブルノック式の出没機構）であるため、操作方法が簡単であり、ユーザーが操作方法を容易に習得できる。 In the thermochromic writing instrument 1 of the present embodiment, the infestation mechanism is a side slide type infestation mechanism using a rotary cam mechanism, and both the pen tip protruding operation and the pen tip indentation operation slide the clip body 7 forward. Since it is an operation type (so-called double knock type haunting mechanism), the operation method is simple and the user can easily learn the operation method.

本実施の形態の熱変色性筆記具１は、後方に開放された第１の長孔４４と前方に開放された第２の長孔５１とによりスライド孔２１を形成したことによって、前記中間軸４と前記後軸５とを連結する際（即ちスライド孔２１を形成する際）に、クリップ体７を第１の長孔４４と第２の長孔５１とに挿入でき、クリップ体７をスライド孔２１に容易に挿入することができ、クリップ体７と軸筒２との容易な挿入組立が可能となる。 In the thermochromic writing tool 1 of the present embodiment, the intermediate shaft 4 is formed by forming a slide hole 21 by a first elongated hole 44 opened rearward and a second elongated hole 51 opened forward. When connecting the rear shaft 5 to the rear shaft 5 (that is, when forming the slide hole 21), the clip body 7 can be inserted into the first elongated hole 44 and the second elongated hole 51, and the clip body 7 can be inserted into the slide hole. It can be easily inserted into the 21 and the clip body 7 and the barrel 2 can be easily inserted and assembled.

本実施の形態の熱変色性筆記具１は、前記中間軸４の側壁と前記後軸５の側壁とを径方向に重なるように連結し、前記第１の長孔４４と前記第２の長孔５１とを径方向に連通させたことにより、軸筒２全体が不必要に長くなることを回避できる。 In the thermochromic writing instrument 1 of the present embodiment, the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5 are connected so as to overlap in the radial direction, and the first elongated hole 44 and the second elongated hole are connected. By communicating with 51 in the radial direction, it is possible to prevent the entire shaft cylinder 2 from becoming unnecessarily long.

本実施の形態の熱変色性筆記具１は、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７に当接してなることにより、ペン先突出状態からペン先没入状態にする際、弾発体８の後方付勢による筆記体９及びクリップ体７が後方移動し、クリップ体７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内のインキの逆流やペン先９１からの空気の混入を防止できる。 In the thermochromic writing instrument 1 of the present embodiment, the friction portion 10 is made of an elastic material, and a part of the friction portion 10 is in contact with the clip body 7 in the pen tip immersion state, so that the pen tip is in a protruding state. When the pen tip is immersed in the nib, the cursive body 9 and the clip body 7 move backward due to the rearward bias of the elastic body 8, and the clip body 7 and the friction portion 10 made of an elastic material come into contact with each other. The impact applied to the cursive 9 can be mitigated. As a result, it is possible to prevent the backflow of ink in the cursive 9 and the mixing of air from the pen tip 91.

＜第２の実施の形態＞
図１１乃至図３５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。 <Second Embodiment>
11 to 35 show a second embodiment of the present invention. In the thermochromic writing instrument 1 of the present embodiment, the shaft cylinder 2, the writing body 9 housed in the shaft cylinder 2, and the pen tip 91 of the writing body 9 can freely appear and disappear from the front end hole 31 of the shaft cylinder 2. It is equipped with a haunting mechanism.

・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９２と、該インキ収容管９２内に充填される熱変色性インキ９３と、該熱変色性インキ９３の後端に充填され且つ該熱変色性インキ９３の消費に伴い前進する追従体９４（例えば高粘度流体）とからなる。 Cursive The cursive 9 includes a pen tip 91, an ink containing tube 92 in which the pen tip 91 is press-fitted and fixed to a front end opening, and a heat-discoloring ink 93 filled in the ink containing tube 92. It is composed of a follower 94 (for example, a high-viscosity fluid) that is filled in the rear end of the heat-discoloring ink 93 and advances with consumption of the heat-discoloring ink 93.

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９２の後端開口部に、インキ収容管９２と外部とが通気可能な通気孔を備えた尾栓９５が取り付けられる。前記ペン先９１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９１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。 The pen tip 91 may be composed of, for example, only a metal ballpoint pen tip having a ball rotatably held at the front end, or a synthetic resin pen tip holder holding the rear outer surface of the ballpoint pen tip. It may be. Further, a tail plug 95 having a ventilation hole through which the ink storage tube 92 and the outside can be ventilated is attached to the rear end opening of the ink storage tube 92. Inside the pen tip 91, a spring that presses the ball at the front end forward is housed. The spring has a configuration in which a rod portion is provided at the front end portion of the compression coil spring, and the front end portion of the rod portion is in contact with the rear surface of the ball. When not writing, the forward urging of the spring causes the ball to come into close contact with the inner surface of the inwardly facing front end edge of the front end of the ballpoint pen tip, thereby preventing ink leakage and ink evaporation from the front end of the pen tip 91.

・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。 -Axle cylinder The axle 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.

図１８に前軸３を示す。前記前軸３は、合成樹脂（例えば、ポリカーボネート樹脂）の成形体からなる先細円筒状の本体３ａと、該本体３ａ外面に設けられる弾性材料からなる把持部３ｂとからなる。前記把持部３ｂは、２色成形または本体３ａ外面への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３２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。 FIG. 18 shows the front axle 3. The front shaft 3 is composed of a tapered cylindrical main body 3a made of a molded body of a synthetic resin (for example, polycarbonate resin) and a grip portion 3b made of an elastic material provided on the outer surface of the main body 3a. The grip portion 3b is provided by two-color molding or mounting on the outer surface of the main body 3a. The diameter of the rear end portion of the front shaft 3 is reduced, and a male screw portion 32 is formed on the outer surface thereof. A front end hole 31 is formed in the front end of the front shaft 3 in the front-rear direction.

図１９乃至図２１に中間軸４を示す。前記中間軸４は、円筒状の合成樹脂（例えば、ポリカーボネート樹脂）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４６が形成される。前記メネジ部４６に前記前軸３のオネジ部３２が螺合可能である。前記中間軸４の後端部には、縮径部４３が一体に形成される。前記中間軸４の後端部側壁には、前端が閉鎖され且つ後端が開放された、前後方向に延びる第１の長孔４４が形成される。さらに、前記縮径部４３の外面には外向突起４５が一体に形成される。前記縮径部４３よりも前方の前記中間軸４の内面には、段部４２が一体に形成される。前記段部４２より前方の前記中間軸４の内面には、カム部４１が一体に形成される。また、前記第１の長孔４４の前端は、前記段部（即ち前記カム部４１の後端）よりも僅かに前方に位置し且つカム部４１のカム歯４１ａよりも後方に位置している。また、前記第１の長孔４４より前方の中間軸４の外面には、前後方向に延びるガイド溝４８が形成される。前記ガイド溝４８に、クリップ体７の玉部７１ａが常時係合し、クリップ体７の前後方向の移動に伴って、前記クリップ体７の玉部７１ａが前記ガイド溝４８に沿って前後方向に移動可能である。前記ガイド溝４８と玉部７１ａによって、ポケット等の被挟持物が強固に挟持される。 19 to 21 show the intermediate shaft 4. The intermediate shaft 4 is made of a molded body of a cylindrical synthetic resin (for example, a polycarbonate resin). A female screw portion 46 is formed on the inner surface of the front end portion of the intermediate shaft 4. The male screw portion 32 of the front shaft 3 can be screwed into the female screw portion 46. A reduced diameter portion 43 is integrally formed at the rear end portion of the intermediate shaft 4. A first elongated hole 44 extending in the front-rear direction is formed on the rear side wall of the intermediate shaft 4 so that the front end is closed and the rear end is open. Further, an outward protrusion 45 is integrally formed on the outer surface of the reduced diameter portion 43. A step portion 42 is integrally formed on the inner surface of the intermediate shaft 4 in front of the reduced diameter portion 43. A cam portion 41 is integrally formed on the inner surface of the intermediate shaft 4 in front of the step portion 42. Further, the front end of the first elongated hole 44 is located slightly forward of the step portion (that is, the rear end of the cam portion 41) and rearward of the cam tooth 41a of the cam portion 41. .. Further, a guide groove 48 extending in the front-rear direction is formed on the outer surface of the intermediate shaft 4 in front of the first elongated hole 44. The ball portion 71a of the clip body 7 is constantly engaged with the guide groove 48, and as the clip body 7 moves in the front-rear direction, the ball portion 71a of the clip body 7 moves in the front-rear direction along the guide groove 48. It is movable. A pocket or other object to be held is firmly held by the guide groove 48 and the ball portion 71a.

図２２乃至図２５に後軸５を示す。前記後軸５は、円筒状の合成樹脂（例えば、ポリカーボネート樹脂）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。それにより、前記後軸５の後端外面に摩擦部１０が固定される。また、前記後軸５の内面には、内向突起５３が一体に形成される。前記第２の長孔５１の幅寸法は、前記第１の長孔４４の幅寸法と等しく設定され、それにより、スライド孔２１に沿ってクリップ体７の前後方向のスムーズな移動が可能となる。 The rear axle 5 is shown in FIGS. 22 to 25. The rear shaft 5 is made of a molded body of a cylindrical synthetic resin (for example, a polycarbonate resin). A second elongated hole 51 extending in the front-rear direction is formed on the side wall of the front end portion of the rear shaft 5 so that the front end is open and the rear end is closed. Further, a mounting hole 52 is formed in the rear end of the rear shaft 5 in the front-rear direction. A friction portion 10 made of an elastic material is press-fitted into the mounting hole 52. As a result, the friction portion 10 is fixed to the outer surface of the rear end of the rear shaft 5. Further, an inward projection 53 is integrally formed on the inner surface of the rear shaft 5. The width dimension of the second elongated hole 51 is set to be equal to the width dimension of the first elongated hole 44, whereby the clip body 7 can move smoothly in the front-rear direction along the slide hole 21. ..

図２８にクリップ体７を示す。前記クリップ体７は、前後方向に延びるクリップ本体７１と、該クリップ本体７１の後部に一体に連設される基部７２と、該基部７２と一体に連設され且つ基部７２より前方に延びる軸部７３とからなる主要部７ａと、該軸部７３に取り付けられる円筒体７４とからなる。前記クリップ体７の主要部７ａ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。前記クリップ本体７１の裏面（内面）に板状の玉部７１ａが一体に突設される。 FIG. 28 shows the clip body 7. The clip body 7 has a clip main body 71 extending in the front-rear direction, a base portion 72 integrally connected to the rear portion of the clip main body 71, and a shaft portion integrally connected to the base portion 72 and extending forward from the base portion 72. It is composed of a main portion 7a including 73 and a cylindrical body 74 attached to the shaft portion 73. The main part 7a of the clip body 7 is obtained by a molded body of a synthetic resin (for example, a polycarbonate resin). A plate-shaped ball portion 71a is integrally projected on the back surface (inner surface) of the clip body 71.

前記軸部７３は、大径部７３ｂと、該大径部７３ｂより前方に連設される、該該大径部７３ｂより小さい外径を有する小径部７３ｃとからなる。前記大径部７３ｂの外面には第１の外向突起７３ｄが一体に形成され、前記小径部７３ｃの外面には第２の外向突起７３ｅが一体に形成される。前記第１の外向突起７３ｄ及び第２の外向突起７３ｅは、例えば、環状突起または複数個が周状に分散された分散状突起が挙げられる。 The shaft portion 73 includes a large-diameter portion 73b and a small-diameter portion 73c which is connected to the front of the large-diameter portion 73b and has an outer diameter smaller than that of the large-diameter portion 73b. A first outward protrusion 73d is integrally formed on the outer surface of the large diameter portion 73b, and a second outward protrusion 73e is integrally formed on the outer surface of the small diameter portion 73c. Examples of the first outward protrusion 73d and the second outward protrusion 73e include an annular protrusion or a dispersed protrusion in which a plurality of the outward protrusions 73e are dispersed in a circumferential shape.

前記クリップ体７の基部７２の外面または軸部７３の外面には、前後方向に延びるリブ７２ａが形成される。前記リブ７２ａが、中間軸４の後端部内面に形成した前後方向に延びる溝４９に係合し、前記リブ７２ａが前記溝４９に沿って前後方向に移動する。それによって、クリップ体７の周方向のぐらつきを抑えることができる。 A rib 72a extending in the front-rear direction is formed on the outer surface of the base portion 72 of the clip body 7 or the outer surface of the shaft portion 73. The rib 72a engages with a groove 49 extending in the front-rear direction formed on the inner surface of the rear end portion of the intermediate shaft 4, and the rib 72a moves in the front-rear direction along the groove 49. As a result, wobbling of the clip body 7 in the circumferential direction can be suppressed.

図２９乃至図３１に円筒体７４を示す。前記円筒体７４は、前記クリップ体７の軸部７３の外面に取り付けられる。前記円筒体７４の前端には、カム歯７４ａが形成される。前記円筒体７４の内部には、内孔が前後方向に貫通され、前記内孔の内面に内向突起７４ｂが一体に形成される。前記円筒体７４は、クリップ体７の軸部７３の外面の第１の外向突起７３ｄと乗り越え係合し、クリップ体７と円筒体７４が一体となって、前後方向に移動可能となる。前記円筒体７４の外面には、複数のガイド突起７４ｃが一体に形成され、前記ガイド突起７４ｃが、カム部４１のカム溝４１ｂに沿って前後方向に移動可能に係合し、それによって、軸筒２内での円筒体７４の回転が阻止される。前記円筒体７４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。 29 to 31 show the cylindrical body 74. The cylindrical body 74 is attached to the outer surface of the shaft portion 73 of the clip body 7. A cam tooth 74a is formed at the front end of the cylindrical body 74. An inner hole is penetrated in the front-rear direction inside the cylindrical body 74, and an inward projection 74b is integrally formed on the inner surface of the inner hole. The cylindrical body 74 gets over and engages with the first outward protrusion 73d on the outer surface of the shaft portion 73 of the clip body 7, and the clip body 7 and the cylindrical body 74 are integrated and can move in the front-rear direction. A plurality of guide protrusions 74c are integrally formed on the outer surface of the cylindrical body 74, and the guide protrusions 74c are movably engaged with each other along the cam groove 41b of the cam portion 41 in the front-rear direction, whereby the shaft is formed. The rotation of the cylindrical body 74 in the cylinder 2 is prevented. The cylindrical body 74 is obtained by molding a synthetic resin (for example, polyacetal resin).

図３２乃至図３３に回転部材６を示す。前記回転部材６は、その外面に前後方向に延びる複数本（例えば４本）の突条６１を備え、該突条６１が、カム部４１のカム歯４１ａ及びカム部４１のカム溝４１ｂと係合される。前記回転部材６の内部には前後方向に貫通する内孔が形成される。前記回転部材６の内孔の内面には内向突起６２が形成される。前記回転部材６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。 The rotating member 6 is shown in FIGS. 32 to 33. The rotating member 6 is provided with a plurality of (for example, four) ridges 61 extending in the front-rear direction on the outer surface thereof, and the ridges 61 engage with the cam teeth 41a of the cam portion 41 and the cam groove 41b of the cam portion 41. Will be combined. An inner hole penetrating in the front-rear direction is formed inside the rotating member 6. An inward projection 62 is formed on the inner surface of the inner hole of the rotating member 6. The rotating member 6 is obtained by molding a synthetic resin (for example, polyacetal resin).

図３５に、ペン先突出状態におけるクリップ体７と回転部材６との係合状態を示す。前記回転部材６の内向突起６２が、クリップ体７の第２の外向突起７３ｅと乗り越え係合する。それにより、クリップ体７と回転部材６の抜け止めがなされる。また、前記回転部材６が前後方向のあそびを有するとともに、回転可能に取り付けられる。前記前後方向のあそび（移動可能量）は、回転部材６の突条６１とカム部４１のカム歯４１ａとの係脱が可能な程度の小さい寸法に設定される。 FIG. 35 shows an engaged state between the clip body 7 and the rotating member 6 in the pen tip protruding state. The inward projection 62 of the rotating member 6 gets over and engages with the second outward projection 73e of the clip body 7. As a result, the clip body 7 and the rotating member 6 are prevented from coming off. Further, the rotating member 6 has a play in the front-rear direction and is rotatably attached. The play (movable amount) in the front-rear direction is set to a size small enough to allow the ridge 61 of the rotating member 6 and the cam tooth 41a of the cam portion 41 to be engaged and disengaged.

・クリップ体の組立
前記クリップ体７の組立について説明する。前記中間軸４の第１の長孔４４の後端開放部より、該第１の長孔４４内にクリップ体７の基部７２を挿入するとともに、クリップ体７の筒状の軸部７３を中間軸４内に挿入する。その後、中間軸４の第１の長孔４４と後軸５の第２の長孔５１とを径方向に連通させるように（径方向に重なるように）、前記後軸５の内面を前記中間軸４の縮径部４３の外面に嵌合させるとともに、クリップ体７の基部７２を、第２の長孔５１の前端開放部より、該第２の長孔５１内に挿入する。それにより、前記中間軸４と前記後軸５とが連結され、前記第１の長孔４４と第２の長孔５１とにより、前後方向に延びるスライド孔２１が形成されるとともに、前記スライド孔２１より径方向外方にクリップ体７（クリップ本体７１及び基部７２の一部）が突出され、前記クリップ体７がスライド孔２１に沿って前後方向にスライド可能（前後方向に摺動可能）に構成される。尚、このとき、前記中間軸４の縮径部４３外面の外向突起４５と後軸５の内面の内向突起５３が乗り越え係合される。 -Assembly of the clip body The assembly of the clip body 7 will be described. The base portion 72 of the clip body 7 is inserted into the first elongated hole 44 from the rear end opening portion of the first elongated hole 44 of the intermediate shaft 4, and the tubular shaft portion 73 of the clip body 7 is inserted in the middle. Insert into shaft 4. After that, the inner surface of the rear shaft 5 is connected to the middle so that the first long hole 44 of the intermediate shaft 4 and the second long hole 51 of the rear shaft 5 are communicated in the radial direction (so as to overlap in the radial direction). The base portion 72 of the clip body 7 is inserted into the second elongated hole 51 from the front end open portion of the second elongated hole 51 while being fitted to the outer surface of the reduced diameter portion 43 of the shaft 4. As a result, the intermediate shaft 4 and the rear shaft 5 are connected, and the first elongated hole 44 and the second elongated hole 51 form a slide hole 21 extending in the front-rear direction, and the slide hole 21 is formed. The clip body 7 (a part of the clip body 71 and the base portion 72) protrudes outward in the radial direction from 21 so that the clip body 7 can slide in the front-rear direction (sliding in the front-rear direction) along the slide hole 21. It is composed. At this time, the outward protrusion 45 on the outer surface of the reduced diameter portion 43 of the intermediate shaft 4 and the inward protrusion 53 on the inner surface of the rear shaft 5 get over and engage with each other.

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の後端に常時固定される。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 always fixed to the rear end of the axle cylinder 2. Further, the front shaft 3 and the intermediate shaft 4 are detachably connected by screwing, whereby the cursive body 9 can be exchanged.

・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４内面に形成されたカム部４１と、該カム部４１に係合し且つ筆記体９の後端に当接する回転部材６と、該回転部材６に係合し且つスライド孔２１より径方向外方に突出するクリップ体７と、軸筒２内に収容され且つ筆記体９を後方に付勢する弾発体８（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クリップ体７を前方にスライド操作するダブルノック式である。 -Infestation mechanism The infestation mechanism is a side-slide type infestation mechanism using a rotary cam mechanism. The infestation mechanism engages with a cam portion 41 formed on the inner surface of the intermediate shaft 4, a rotating member 6 that engages with the cam portion 41 and abuts on the rear end of the cursive body 9, and the rotating member 6. The clip body 7 projects radially outward from the slide hole 21, and the elastic body 8 (for example, a compression coil spring) housed in the barrel 2 and urging the cursive body 9 rearward. The infestation mechanism of the present embodiment is a double knock type in which both the pen tip protrusion operation and the pen tip immersion operation slide the clip body 7 forward.

前記カム部４１は、前方に突出する鋸歯状の複数のカム歯４１ａと、該カム歯４１ａ間に形成される、前後方向に延びる複数のカム溝４１ｂとを備える。前記回転部材６は、その外面に長手方向に延びる複数本（例えば４本）の突条６１を備え、該突条６１が、カム部４１のカム歯４１ａ及びカム部４１のカム溝４１ｂと係合される。前記クリップ体７の軸部７３に取り付けられた円筒体７４の前端には、回転部材６の突条６１の後端と係合するカム歯７４ａが一体に形成される。 The cam portion 41 includes a plurality of serrated cam teeth 41a projecting forward, and a plurality of cam grooves 41b formed between the cam teeth 41a and extending in the front-rear direction. The rotating member 6 is provided with a plurality of (for example, four) ridges 61 extending in the longitudinal direction on the outer surface thereof, and the ridges 61 engage with the cam teeth 41a of the cam portion 41 and the cam groove 41b of the cam portion 41. Will be combined. A cam tooth 74a that engages with the rear end of the ridge 61 of the rotating member 6 is integrally formed at the front end of the cylindrical body 74 attached to the shaft portion 73 of the clip body 7.

・ペン先の出没
ペン先没入状態からクリップ体７を前方に、弾発体８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７の軸部７３に取り付けられた円筒体７４によって回転部材６が前方に押圧され、前記回転部材６の突条６１がカム溝４１ｂに沿って前方に移動するに伴って、前記回転部材６が筆記体９の後端を前方に押圧し、ペン先９１が前端孔３１より外部に突出される。このとき、前記軸部７３に取り付けられた円筒体７４のカム歯７４ａと前記回転部材６の突条６１との当接によって回転部材６がカム部４１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６の突条６１がカム部４１のカム歯４１ａに係合され、ペン先突出状態が維持される。 -Infestation of the pen tip When the clip body 7 is slid forward from the pen tip immersion state against the rearward bias by the elastic body 8, the rotating member is formed by the cylindrical body 74 attached to the shaft portion 73 of the clip body 7. 6 is pressed forward, and as the ridge 61 of the rotating member 6 moves forward along the cam groove 41b, the rotating member 6 presses the rear end of the cursive 9 forward, and the pen tip 91. Projects outward from the front end hole 31. At this time, the rotating member 6 rotates by a certain angle with respect to the cam portion 41 due to the contact between the cam teeth 74a of the cylindrical body 74 attached to the shaft portion 73 and the ridge 61 of the rotating member 6. As a result, the ridge 61 of the rotating member 6 is engaged with the cam tooth 41a of the cam portion 41, and the pen tip protruding state is maintained.

ペン先突出状態からクリップ体７を前方にスライド操作すると、クリップ体７の軸部７３に取り付けられた円筒体７４が回転部材６を前方に押圧し、前記円筒体７４のカム歯７４ａと前記回転部材６の突条６１との当接によって回転部材６がカム部４１に対して一定角度だけ回転する。それによって、前記突条６１とカム部４１のカム歯４１ａとの係合状態が解除され、弾発体８による後方付勢により、前記突条６１がカム部４１のカム溝４１ｂに沿って後方に移動する。前記回転部材６が後方に移動することに伴って、筆記体９が後方に移動し、ペン先没入状態となる。 When the clip body 7 is slid forward from the pen tip protruding state, the cylindrical body 74 attached to the shaft portion 73 of the clip body 7 presses the rotating member 6 forward, and the cam teeth 74a of the cylindrical body 74 and the rotation thereof. The rotating member 6 rotates by a certain angle with respect to the cam portion 41 due to the contact of the member 6 with the ridge 61. As a result, the engagement state between the ridge 61 and the cam tooth 41a of the cam portion 41 is released, and the ridge 61 is rearward along the cam groove 41b of the cam portion 41 due to the rearward bias by the elastic body 8. Move to. As the rotating member 6 moves backward, the cursive 9 moves backward, and the pen tip is immersed.

・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の後端部もしくは後軸５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 or an SBS resin (styrene-butadiene-styrene copolymer). , SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine-based resin, chloroprene resin, nitrile resin, polyester-based resin, ethylene propylene diene rubber (EPDM) and the like. The elastic synthetic resin constituting the friction portion 10 is a low-wear elastic material in which almost no wear residue (eraser) is generated during friction, as compared with a material made of a highly wear-resistant elastic material (for example, an eraser). It is preferably composed of. Further, the friction portion 10 may be provided at least on the outer surface of the rear end portion of the axle cylinder 2. For example, the friction portion 10 made of an elastic material is press-fitted into the rear end portion of the axle cylinder 2 or the rear end portion of the rear shaft 5. , Engagement, screwing, fitting, bonding, 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。 -Heat-changing ink In the present embodiment, the heat-changing ink is preferably a lossless heat-changing ink. The reversible thermochromic ink is a heat-decoloring type that decolorizes by heating from a color-developing state, a color memory-holding type that alternately stores a color-developing state or a decoloring state in a specific temperature range, or a decoloring state. Various types such as a heating color-developing type that develops color by heating and returns to a decolorized state by cooling from the color-developed state can be configured 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。 Further, the coloring material contained in the reversible thermochromic ink is a conventionally known (a) electron-donating color-developing organic compound, (b) electron-accepting compound, and (c) the color reaction of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least three essential components of a reaction medium for determining the occurrence temperature of the above is encapsulated in a microcapsule is preferably used.

本実施の形態では、図１０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１０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. 10, the shape of the curve plotting the change in coloring density due to the temperature change is higher than the discoloration temperature range, contrary to the case where the temperature is raised from the lower temperature side than the discoloration temperature range. The color changes by following a different path from the case of descending from the side, and the color is developed in the low temperature range below the complete color development temperature (t 1 ), or the color is decolorized in the high temperature range above the complete decolorization temperature (t 4 ). It is preferable to apply a color memory retention type thermochromic ink whose state can be stored in a specific temperature range [a temperature range between t 2 to t 3 (substantial two-phase holding temperature range)]. In FIG. 10, ΔH indicates a temperature width (that is, a hysteresis width) indicating the degree of hysteresis. If the value of ΔH is small, only one of the two states before and after discoloration can exist. When the value of ΔH is large, it becomes easy to maintain each state before and after discoloration.

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（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 discoloration temperature due to the frictional heat of the friction portion 10 of the heat-discoloring ink is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in the present embodiment, the high temperature side discoloration point [complete decolorization temperature (t 4 )] is set in the range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration. It is effective to set the point [complete color development temperature (t 1 )] in the range of -30 ° C to + 20 ° C (preferably -30 ° C to + 10 ° C). As a result, it is possible to effectively maintain the color exhibited in the normal state (daily living temperature range), and the handwriting by the reversible thermochromic ink can be easily discolored by the frictional heat of the friction portion 10.

本実施の形態の熱変色性筆記具１は、前記摩擦部１０を軸筒２の後端外面に固定したことにより、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、本実施の形態の熱変色性筆記具１は、ペン先出没の操作をするための操作部をクリップ体７に設け、摩擦部１０をクリップ体７（操作部）から独立させたことにより、ペン先９１を出没する際、クリップ体７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、本実施の形態の熱変色性筆記具１は、軸筒２外面にクリップ体７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 heat-discoloring writing instrument 1 of the present embodiment, since the friction portion 10 is fixed to the outer surface of 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 is possible by using 10. Further, in the thermochromic writing tool 1 of the present embodiment, an operation portion for operating the pen tip infestation is provided on the clip body 7, and the friction portion 10 is made independent of the clip body 7 (operation portion). Since the clip body 7 is operated and the friction portion 10 is not operated when the pen tip 91 appears and disappears, it is possible to prevent the friction portion 10 from becoming dirty with hand stains or the like. Further, the heat-discoloring writing instrument 1 of the present embodiment has a protruding portion as compared with the conventional multi-core type side-slide type heat-discoloring writing instrument, although the clip body 7 is provided on the outer surface of the barrel 2. There are few, 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、出没機構が、回転カム機構を用いたサイドスライド式出没機構であり、ペン先突出操作及びペン先没入操作の何れもがクリップ体７を前方にスライド操作するタイプ（いわゆるダブルノック式の出没機構）であるため、操作方法が簡単であり、ユーザーが操作方法を容易に習得できる。 In the thermochromic writing instrument 1 of the present embodiment, the infestation mechanism is a side slide type infestation mechanism using a rotary cam mechanism, and both the pen tip protruding operation and the pen tip indentation operation slide the clip body 7 forward. Since it is an operation type (so-called double knock type haunting mechanism), the operation method is simple and the user can easily learn the operation method.

本実施の形態の熱変色性筆記具１は、後方に開放された第１の長孔４４と前方に開放された第２の長孔５１とによりスライド孔２１を形成したことによって、前記中間軸４と前記後軸５とを連結する際（即ちスライド孔２１を形成する際）に、クリップ体７を第１の長孔４４と第２の長孔５１とに挿入でき、クリップ体７をスライド孔２１に容易に挿入することができ、クリップ体７と軸筒２との容易な挿入組立が可能となる。 In the thermochromic writing tool 1 of the present embodiment, the intermediate shaft 4 is formed by forming a slide hole 21 by a first elongated hole 44 opened rearward and a second elongated hole 51 opened forward. When connecting the rear shaft 5 to the rear shaft 5 (that is, when forming the slide hole 21), the clip body 7 can be inserted into the first elongated hole 44 and the second elongated hole 51, and the clip body 7 can be inserted into the slide hole. It can be easily inserted into the 21 and the clip body 7 and the barrel 2 can be easily inserted and assembled.

本実施の形態の熱変色性筆記具１は、前記中間軸４の側壁と前記後軸５の側壁とを径方向に重なるように連結し、前記第１の長孔４４と前記第２の長孔５１とを径方向に連通させたことにより、軸筒２全体が不必要に長くなることを回避できる。 In the thermochromic writing instrument 1 of the present embodiment, the side wall of the intermediate shaft 4 and the side wall of the rear shaft 5 are connected so as to overlap in the radial direction, and the first elongated hole 44 and the second elongated hole are connected. By communicating with 51 in the radial direction, it is possible to prevent the entire shaft cylinder 2 from becoming unnecessarily long.

本実施の形態の熱変色性筆記具１は、前記クリップ体７が、前記軸筒２内に収容され且つ前後方向に延びる軸部７３を有し、前記軸部７３と前記回転部材６とが、互いに回転可能且つ互いに前後方向のあそびを有した状態で前後方向に係止されることにより、ペン先突出状態において、クリップ体７の不用意な前後方向の移動が抑えられる。その結果、ペン先突出状態でクリップ体７の近傍を把持しても、安定した摩擦操作が可能となる。 In the thermochromic writing tool 1 of the present embodiment, the clip body 7 has a shaft portion 73 housed in the shaft cylinder 2 and extends in the front-rear direction, and the shaft portion 73 and the rotating member 6 are By being locked in the front-rear direction while being rotatable with each other and having play in the front-rear direction with each other, careless movement of the clip body 7 in the front-rear direction is suppressed in the pen tip protruding state. As a result, stable friction operation is possible even if the vicinity of the clip body 7 is gripped with the pen tip protruding.

本実施の形態の熱変色性筆記具１は、前記スライド孔２１より前方の前記軸筒２の外面に、前後方向に延びるガイド溝４８を形成し、前記クリップ体７の前部内面に玉部７１ａを突設し、前記クリップ体７の前後方向の移動に伴って前記ガイド溝４８内を前記玉部７１ａが前後方向に摺動することにより、クリップの挟持性能が向上するとともにクリップ体７の横方向（周方向）のぐらつきを防止できる。 In the thermochromic writing tool 1 of the present embodiment, a guide groove 48 extending in the front-rear direction is formed on the outer surface of the barrel 2 in front of the slide hole 21, and the ball portion 71a is formed on the inner surface of the front portion of the clip body 7. The ball portion 71a slides in the guide groove 48 in the front-rear direction as the clip body 7 moves in the front-rear direction, whereby the clip holding performance is improved and the side of the clip body 7 is laterally provided. It is possible to prevent wobbling in the direction (circumferential direction).

本実施の形態の熱変色性筆記具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７に当接させることもできる。それにより、ペン先突出状態からペン先没入状態にする際、弾発体８の後方付勢により筆記体９及びクリップ体７が後方移動し、クリップ体７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。 In the thermochromic writing instrument 1 of the present embodiment, the friction portion 10 is made of an elastic material, and a part of the friction portion 10 can be brought into contact with the clip body 7 in a pen tip immersed state. As a result, when changing from the pen tip protruding state to the pen tip immersion state, the cursive body 9 and the clip body 7 move backward due to the rearward bias of the elastic body 8, and the clip body 7 and the friction portion 10 made of an elastic material are brought together. Since the contact is made, the impact applied to the cursive 9 at that time can be alleviated. As a result, it is possible to prevent backflow of ink in the cursive 9 and air from the pen tip 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 オネジ部
３ａ 本体
３ｂ 把持部
４ 中間軸
４１ カム部
４１ａ カム歯
４１ｂ カム溝
４２ 段部
４３ 縮径部
４４ 第１の長孔
４５ 外向突起
４６ メネジ部
４７ 係止突起
４８ ガイド溝
４９ 溝
５ 後軸
５１ 第２の長孔
５２ 取付孔
５３ 内向突起
６ 回転部材
６１ 突条
６２ 内向突起
７ クリップ体
７１ クリップ本体
７１ａ 玉部
７２ 基部
７２ａ リブ
７３ 軸部
７３ａ カム歯
７３ｂ 大径部
７３ｃ 小径部
７３ｄ 第１の外向突起
７３ｅ 第２の外向突起
７４ 円筒体
７４ａ カム歯
７４ｂ 内向突起
７４ｃ ガイド突起
７ａ 主要部
８ 弾発体
９ 筆記体
９１ ペン先
９２ インキ収容管
９３ 熱変色性インキ
９４ 追従体
９５ 尾栓
１０ 摩擦部 1 Thermal discoloration writing tool 2 Shaft cylinder 21 Slide hole 3 Front shaft 31 Front end hole 32 Male screw part 3a Main body 3b Grip part 4 Intermediate shaft 41 Cam part 41a Cam tooth 41b Cam groove 42 Step part 43 Reduced diameter part 44 First long hole 45 Outward protrusion 46 Female screw part 47 Locking protrusion 48 Guide groove 49 Groove 5 Rear axle 51 Second long hole 52 Mounting hole 53 Inward protrusion 6 Rotating member 61 Protrusion 62 Inward protrusion 7 Clip body 71 Clip body 71a Ball part 72 Base 72a Rib 73 Shaft 73a Cam tooth 73b Large diameter 73c Small diameter 73d First outward protrusion 73e Second outward protrusion 74 Cylindrical body 74a Cam tooth 74b Inward protrusion 74c Guide protrusion 7a Main part 8 Repellent 9 Writing body 91 Pen tip 92 Ink storage tube 93 Thermal discoloration ink 94 Follower 95 Tail plug 10 Friction part

Claims (4)

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、
前記軸筒の側壁に前後方向に延びるスライド孔を設け、
前記スライド孔に配設した前記クリップ体を前方へスライド操作することで、前記筆記体のペン先を没入状態から突出状態にする出没機構を備え、
前記出没機構として、前記側壁の内面の円周方向に沿って交互に配置された前後方向に延びる複数のカム歯及びカム溝と、前記筆記体の後方に回転可能に配置され、前記カム歯又は前記カム溝に交互に係合可能な複数の突条を有する回転部材と、前記回転部材を回動させる複数の他のカム歯が設けられた円筒体と、前記筆記体を後方に付勢する弾発体と、を前記軸筒内に備え、前記クリップ体、前記円筒体及び前記回転部材が一体となって、前後方向に移動可能となり、
前記回転部材は、前後方向のあそびを有するとともに、回転可能に取り付けられ、前記前後方向のあそびは、前記回転部材の前記突条と、前記側壁の内面の前記カム歯との係脱が可能な程度の小さい寸法に設定され、
前記弾発体の付勢力に抗して、前記クリップ体を前方へスライド操作することにより、前記突条が前記カム歯又は前記カム溝に交互に係合して、前記筆記体のペン先が交互に突出状態又は没入状態となり、
前記筆記体のペン先の突出状態において、前記クリップ体、前記円筒体及び前記回転部材が一体となって、後方への移動が阻止されることを特徴とする熱変色性筆記具。 A cursive containing thermochromic ink is housed in a barrel, and the operating body provided on the barrel is operated to move the cursive in the front-rear direction, and the pen tip of the cursive is used as a writing instrument. A heat-discoloring writing instrument that can be seen from the tip.
A friction portion capable of thermally discoloring the stroke by rubbing the stroke of the heat-discolorable ink and the frictional heat generated at that time, and at least one clip body as the operating body are provided, and the friction portion is attached to the shaft cylinder. In addition to being provided at the rear end, the clip body is provided at a portion other than the rear end of the axle cylinder .
A slide hole extending in the front-rear direction is provided on the side wall of the barrel.
It is provided with a retracting mechanism that causes the pen tip of the cursive to project from the immersed state by sliding the clip body arranged in the slide hole forward.
As the infestation mechanism, a plurality of cam teeth and cam grooves extending in the front-rear direction alternately arranged along the circumferential direction of the inner surface of the side wall, and a cam tooth or a cam groove rotatably arranged behind the writing body. A rotating member having a plurality of ridges that can be alternately engaged with the cam groove, a cylinder provided with a plurality of other cam teeth for rotating the rotating member, and the writing body are urged rearward. The elastic body is provided in the barrel, and the clip body, the cylindrical body, and the rotating member are integrated and can move in the front-rear direction.
The rotating member has a play in the front-rear direction and is rotatably attached, and the play in the front-rear direction is such that the protrusion of the rotating member and the cam tooth on the inner surface of the side wall can be engaged and disengaged. Set to a small dimension of
By sliding the clip body forward against the urging force of the elastic body, the ridges are alternately engaged with the cam teeth or the cam groove, and the pen tip of the cursive body is moved. Alternately protruding or immersive,
A thermochromic writing instrument, characterized in that, in a protruding state of the pen tip of the writing body, the clip body, the cylindrical body, and the rotating member are integrally prevented from moving backward . 前記クリップ体、前記円筒体及び前記回転部材の少なくとも１つが、合成樹脂の成形体である請求項１記載の熱変色性筆記具。 The thermochromic writing instrument according to claim 1 , wherein at least one of the clip body, the cylindrical body, and the rotating member is a molded body made of synthetic resin . 前記クリップ体が、ポリカーボネート樹脂の成形体であり、前記円筒体及び前記回転部材が、ポリアセタール樹脂の成形体である請求項２に記載の熱変色性筆記具。 The thermochromic writing instrument according to claim 2 , wherein the clip body is a molded body made of polycarbonate resin, and the cylindrical body and the rotating member are molded bodies made of polyacetal resin . 前記軸筒が、互いに連結可能な二以上の部品からなり、前記軸筒の後端を構成する部品に、弾性材料からなる前記摩擦部を圧入、係合、螺合、嵌合、接着又は２色成形によって固着した請求項１乃至３の何れか１項に記載の熱変色性筆記具。 The shaft cylinder is composed of two or more parts that can be connected to each other , and the friction portion made of an elastic material is press-fitted, engaged, screwed, fitted, bonded, or 2 to the parts constituting the rear end of the shaft cylinder. The thermochromic writing instrument according to any one of claims 1 to 3 , which is fixed by color molding.
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JPH0628311Y2 (en) * 1988-06-28 1994-08-03 株式会社トンボ鉛筆 Knock type writing instrument
JPH0628312Y2 (en) * 1989-12-11 1994-08-03 株式会社パイロット Writing instrument
JP2002370494A (en) * 2001-06-18 2002-12-24 Shachihata Inc Writing utensil
JP3960847B2 (en) * 2002-04-16 2007-08-15 株式会社パイロットコーポレーション Knock-type writing instrument
JP4613750B2 (en) * 2005-08-26 2011-01-19 ぺんてる株式会社 Double writing instrument
JP2007253487A (en) * 2006-03-23 2007-10-04 Takahiro Kinoshita Writing utensil with seal
KR20190049911A (en) * 2007-02-26 2019-05-09 파일롯트 잉크 가부시키가이샤 Thermally changeable color writing tool
JP4873730B2 (en) * 2007-04-06 2012-02-08 株式会社パイロットコーポレーション Writing instrument

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