JP6352586B2 - Thermochromic writing instrument - Google Patents

Description

本発明は、筆記具を構成する筒体の一方の端部に、熱変色性インキの筆跡を摩擦し、その際に生じる摩擦熱で前記熱変色性インキの筆跡を熱変色可能なゴム状弾性を有する軟質樹脂からなる摩擦体を具備してなる熱変色性筆記具に関する。   The present invention provides a rubber-like elasticity capable of rubbing the handwriting of the thermochromic ink on one end of the cylindrical body constituting the writing instrument and thermally changing the handwriting of the thermochromic ink by the frictional heat generated at that time. The present invention relates to a thermochromic writing instrument comprising a friction body made of a soft resin.

従来から、筆記具を構成する筒体の一方の端部に具備した、熱変色性インキの筆跡を摩擦し、その際に生じる摩擦熱で前記熱変色性インキの筆跡を熱変色可能なゴム状弾性を有する軟質樹脂からなる摩擦体については、特開２００７−１４４９９１号公報「軟質部材の取付構造」等で開示されている。   Conventionally, a rubber-like elasticity that is provided on one end of a cylinder constituting a writing instrument and that can rub the handwriting of the thermochromic ink and thermally change the handwriting of the thermochromic ink by the frictional heat generated at that time. A friction body made of a soft resin having the above is disclosed in Japanese Unexamined Patent Application Publication No. 2007-144991 “Soft member mounting structure”.

また、前記した特開２００７−１４４９９１号公報「軟質部材の取付構造」では、軸筒やキャップなどの筒体に設けた内向突起と、摩擦体の脚部に設けた外向突起とを乗り越え嵌合することで、筒体と摩擦体の装着力を高めた装着構造が開示されている。   Moreover, in the above-mentioned Japanese Patent Application Laid-Open No. 2007-144991, “Soft member mounting structure”, the inward projection provided on the cylindrical body such as the shaft cylinder and the cap and the outward projection provided on the leg portion of the friction body are overcome and fitted. Thus, a mounting structure in which the mounting force between the cylinder and the friction body is increased is disclosed.

特開２００７−１４４９９１号公報JP 2007-144991 A

ところで、熱変色性インキの筆跡を摩擦するときには、摩擦体を特に意識することなく紙面に当接させることが多く、その後、上下方向、左右方向などに摩擦することで、熱変色させている。また、カバンや筆箱に入れて移動する時など、摩擦体が不用意に、カバンや筆箱に当接することもあった。   By the way, when rubbing the handwriting of the thermochromic ink, the friction body is often brought into contact with the paper surface without being particularly conscious, and thereafter, it is thermally discolored by rubbing in the vertical direction, the horizontal direction, and the like. Also, when moving in a bag or pencil case, the friction body may inadvertently contact the bag or pencil case.

しかし、特許文献１では、回転方向へ力が加わると、摩擦体が回転し、摩擦熱の発生効率を低下する恐れがあった。また、摩擦体が回転によって、摩擦体及び／又は筒体に磨耗又は損傷によって、摩擦体が回転しやすくなるとともに、摩擦体と筒体に隙間が発生し、摩擦体にガタツキを生じる恐れがあった。   However, in Patent Document 1, when a force is applied in the rotation direction, the friction body rotates, which may reduce the efficiency of generating frictional heat. In addition, the friction body is likely to rotate due to the rotation of the friction body and wear or damage to the friction body and / or the cylinder, and a gap may be generated between the friction body and the cylinder, which may cause rattling. It was.

本発明はこれらの従来技術に鑑みてなされたものであって、摩擦体の回転を抑制し、繰り返しの使用しても摩擦体にガタツキが発生し難い熱変色性筆記具を提供することにある。   The present invention has been made in view of these prior arts, and it is an object of the present invention to provide a thermochromic writing instrument that suppresses the rotation of the friction body and hardly causes rattling even when used repeatedly.

本発明は、前記問題を解決するために、筆記具を構成する筒体の一方の端部に、熱変色性インキの筆跡を摩擦し、その際に生じる摩擦熱で前記熱変色性インキの筆跡を熱変色可能なゴム状弾性を有する軟質樹脂からなる摩擦体を、保持部材を介して着脱自在に装着してなる熱変色性筆記具であって、前記摩擦体が、少なくとも前記筒体の一方の端部の内面に装着する装着部と、前記筒体又は保持部材の一方の端部から外方に突出し、前記熱変色性インキの筆跡を摩擦する摩擦部とを有し、前記筒体の後端部内に設けた雌ねじ部と、保持部材の側面に設けた雄ねじ部とを、保持部材の後端が、前記筒体内に内在するように着脱自在に螺着してあり、前記摩擦体の装着部の側面に、凹部又は凸部を周方向に離間して複数個、設け、前記筒体又は保持部材の内面に、凸部又は凹部を周方向に離間して複数個、設けるとともに、前記装着部の凹部内に、前記筒体又は保持部材の凸部を配設、または前記筒体又は保持部材の凹部内に、前記装着部の凸部を配設してなり、前記摩擦部の側面に、長手方向に延びる窪み状の通溝を設け、前記保持部材の雄ねじ部の側面に、窪み状の通溝を設けてあり、前記摩擦部の通溝と保持部材の雄ねじ部の通溝が長手方向で連通させ、前記保持部材を取り外すのに必要な回転力が、２００ｇｆ・ｃｍ以上であることを特徴する。 In order to solve the above problem, the present invention rubs the handwriting of the thermochromic ink on one end of the cylinder constituting the writing instrument, and the handwriting of the thermochromic ink is generated by frictional heat generated at that time. A thermochromic writing instrument in which a friction body made of a soft resin having a rubber-like elasticity capable of thermal discoloration is detachably mounted via a holding member , wherein the friction body is at least one end of the cylindrical body A mounting portion to be mounted on the inner surface of the portion, and a friction portion that protrudes outward from one end portion of the cylindrical body or the holding member and rubs the handwriting of the thermochromic ink, and the rear end of the cylindrical body A female screw part provided in the inner part and a male screw part provided on a side surface of the holding member are detachably screwed so that a rear end of the holding member is present in the cylindrical body, and the attachment part of the friction body A plurality of recesses or projections are provided on the side surface of the cylinder or spaced apart in the circumferential direction. A plurality of protrusions or recesses are provided on the inner surface of the member so as to be spaced apart in the circumferential direction, and the protrusions of the cylinder or the holding member are disposed in the recesses of the mounting part, or the cylinder or the holding member The concave portion of the mounting portion is provided with a convex portion of the mounting portion. A concave groove extending in the longitudinal direction is provided on the side surface of the friction portion, and a concave shape is formed on the side surface of the male screw portion of the holding member. A through groove is provided, the through groove of the friction part and the through thread of the male screw part of the holding member are communicated in the longitudinal direction, and the rotational force required to remove the holding member is 200 gf · cm or more. Characterize.

また、前記摩擦体を、保持部材を介して装着するとともに、前記筒体の一方の端部に、前記保持部材を着脱自在に装着してあることを特徴とする。   In addition, the friction body is mounted via a holding member, and the holding member is detachably mounted on one end of the cylindrical body.

また、前記摩擦体の摩擦部と、保持部材の側面に通溝を設けてなり、少なくとも前記摩擦部の通溝の一部と、前記保持部材の通溝の一部が、長手方向において連通することを特徴とする。   In addition, a through groove is provided in the friction part of the friction body and the side surface of the holding member, and at least a part of the through groove of the friction part and a part of the through groove of the holding member communicate in the longitudinal direction. It is characterized by that.

さらにまた、前記摩擦体の側面の外側に、外筒体を着脱自在に配設したことを特徴とする。   Furthermore, an outer cylindrical body is detachably disposed outside the side surface of the friction body.

本願発明の第１の構成によれば、前記摩擦体が、少なくとも前記筒体の一方の端部の内面に装着する装着部と、前記筒体又は保持部材の一方の端部から外方に突出し、前記熱変色性インキの筆跡を摩擦する摩擦部とを有し、前記摩擦体の装着部の側面に、凹部又は凸部を設け、前記筒体又は保持部材の内面に、凸部又は凹部を設けるるとともに、前記装着部の凹部内に、前記筒体又は保持部材の凸部を配設、または前記筒体又は保持部材の凹部内に、前記装着部の凸部を配設することで、前記摩擦体の回転方向への移動を規制することができ、回転による摩擦熱発生効率の低下を抑制するとともに、繰り返しの使用しても摩擦体の回転による摩耗や損傷を抑制し、摩擦体と筒体又は保持部材とのガタツキを発生し難くすることができる。   According to the first configuration of the present invention, the friction body protrudes outward from at least the mounting portion to be mounted on the inner surface of one end portion of the cylindrical body and the one end portion of the cylindrical body or the holding member. A friction part for rubbing the handwriting of the thermochromic ink, and a concave part or a convex part is provided on a side surface of the mounting part of the friction body, and a convex part or a concave part is provided on the inner surface of the cylindrical body or the holding member. And providing the convex portion of the cylindrical body or the holding member in the concave portion of the mounting portion, or arranging the convex portion of the mounting portion in the concave portion of the cylindrical body or the holding member, The movement of the friction body in the rotational direction can be restricted, and the frictional heat generation efficiency due to rotation is suppressed, and wear and damage due to rotation of the friction body are suppressed even when used repeatedly. It is possible to make it difficult for the cylinder or the holding member to play.

本発明の摩擦体は、筒体又は保持部材に、乗り越し嵌合、凹凸嵌合、圧入嵌合等によって装着することができる。また、装着部の凹部内に、前記筒体又は保持部材凸部を位置して配設、または前記筒体又は保持部材の凹部内に、円周方向において前記装着部の凸部が回転を抑制する位置に配設してあれば、遊嵌状や密嵌状等、特に限定されるものではないが、装着性を考慮して遊嵌状に配設することが好ましい。   The friction body of the present invention can be attached to the cylinder body or the holding member by over-fitting, uneven fitting, press-fitting fitting, or the like. Further, the cylindrical body or the holding member convex portion is disposed in the concave portion of the mounting portion, or the convex portion of the mounting portion suppresses rotation in the circumferential direction in the concave portion of the cylindrical body or the holding member. As long as it is arranged at a position where it is placed, there is no particular limitation such as a loose fitting shape or a close fitting shape, but it is preferably arranged in a loose fitting shape in consideration of mounting properties.

尚、摩擦体の摩擦部には、ゴム状弾性を有する軟質樹脂、例えば、シリコーンゴム、フッ素系ゴム、クロロプレンゴム、ニトリルゴム、ポリエステル系ゴム、エチレンプロピレンジエンゴム（ＥＰＤＭ）、スチレン系エラストマー、エステル系エラストマー、オレフィン系エラストマー等、ゴム状弾性を有するゴム、エラストマー等の弾性体が挙げられ、適宜選択して用いることができる。また、摩擦体としては、ショアＡ硬度４０以上、１００以下が好ましい。また、摩擦体は、筒体又は保持部材に、乗り越し嵌合、凹凸嵌合、圧入嵌合等によって装着することができ、前記した凹部と凸部によってのみ装着することもできるが、装着性や引抜力（長手方向への力）を考慮して、前記した凹部と凸部とは長手方向及び／または円周方向の異なる部分にて、摩擦体の装着部と、筒体又は保持部材とを装着することが好ましく、さらに、凹部内に凸部が挿入した後、摩擦体の装着部と、筒体又は保持部材とを装着を開始することで、摩擦体が回転することによる組立性の低下を抑制することができるので好ましい。   In addition, the friction part of the friction body includes a soft resin having rubber-like elasticity, such as silicone rubber, fluorine rubber, chloroprene rubber, nitrile rubber, polyester rubber, ethylene propylene diene rubber (EPDM), styrene elastomer, ester. Examples thereof include elastic bodies such as rubber-based elastomers, olefin-based elastomers, rubbers having rubber-like elasticity, and elastomers. The friction body preferably has a Shore A hardness of 40 or more and 100 or less. In addition, the friction body can be attached to the cylinder body or the holding member by overpass fitting, concave-convex fitting, press-fitting fitting, etc., and can also be attached only by the concave and convex portions described above. In consideration of the pulling force (force in the longitudinal direction), the concave portion and the convex portion are different in the longitudinal direction and / or the circumferential direction, and the friction body mounting portion and the cylindrical body or the holding member are It is preferable to mount, and further, after the protrusion is inserted into the recess, the mounting of the friction body and the mounting of the cylinder or the holding member is started, so that the assemblability is reduced due to the rotation of the friction body. Can be suppressed, which is preferable.

本願発明の第２の構成によれば、前記摩擦体を、保持部材を介して装着するとともに、前記筒体の一方の端部に、前記保持部材を着脱自在に装着することで、摩擦部に汚れが付着したときや、摩擦体及び／または摩擦体保持部を所望の色に交換するとき等、使用者が摩擦体を交換しやすくすることができる。 According to the second configuration of the present invention, the friction body is attached via the holding member, and the holding member is detachably attached to one end portion of the cylindrical body, so that the friction portion is attached. when dirt or the like when replacing the friction body and / or the friction member support portion in a desired color, Ru can be user to easily replace the friction body.

但し、保持部材を螺着等、回転によって、着脱自在とする場合には、着脱に必要な回転力は、摩擦操作時に、保持部材が回転し難く、且つ保持部材の着脱性を考慮して、一定の回転トルクによって、回転を開始することが好ましく、具体的には、２００ｇｆ・ｃｍ以上、より好ましくは、４００ｇｆ・ｃｍ以上、１０００ｇｆ・ｃｍ以下、好ましく８００ｇｆ・ｃｍ以下とすることが好ましい。尚、保持部材を回転する力は、株式会社
東日製作所社製 トルクメーターを用いて測定することができる。 However, when the holding member is detachable by rotation, such as screwing, the rotational force required for attachment / detachment is difficult to rotate during the friction operation, and the detachability of the holding member is taken into consideration. The rotation is preferably started by a constant rotational torque, specifically 200 gf · cm or more, more preferably 400 gf · cm or more, 1000 gf · cm or less, and preferably 800 gf · cm or less. The force for rotating the holding member can be measured using a torque meter manufactured by Tohnichi Corporation.

本願発明の第３の構成によれば、前記摩擦体の摩擦部と、筒体の内面又は保持部材の側面に通溝を設けてなり、少なくとも前記摩擦部の通溝の一部と、前記筒体又は保持部材の通溝の一部が、長手方向において連通することで、摩擦体の装着時に筒体内の圧力が高まることなく装着することできるとともに、摩擦体及び保持部材が外れて、誤飲しても空気の流通を確保することができる。   According to the third configuration of the present invention, the friction part of the friction body and the through-groove are provided in the inner surface of the cylinder or the side surface of the holding member, and at least a part of the through-groove of the friction part, and the cylinder A part of the body or the through groove of the holding member communicates in the longitudinal direction, so that it can be mounted without increasing the pressure in the cylinder when the friction body is mounted, and the frictional body and the holding member are detached, resulting in accidental ingestion. Even so, air circulation can be ensured.

本願発明の第４の構成によれば、前記摩擦体の側面の外側に、外筒体を着脱自在に配設することで、熱変色性筆記具を持ち運ぶときに、摩擦部にゴミなどが付着する等、外部に露出する摩擦部の汚れを抑制することができる。   According to the fourth configuration of the present invention, the outer cylindrical body is detachably disposed on the outer side surface of the friction body, so that dust or the like adheres to the friction portion when carrying the thermochromic writing instrument. Thus, contamination of the friction part exposed to the outside can be suppressed.

本発明に用いる熱変色性インキには、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。   The thermochromic ink used in the present invention is preferably a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

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

本発明は、摩擦体の回転を抑制し、繰り返しの使用しても摩擦体にガタツキが発生し難い熱変色性筆記具を提供することができた。   The present invention has been able to provide a thermochromic writing instrument that suppresses the rotation of the friction body and is less likely to be rattled even when used repeatedly.

第１実施形態の熱変色性筆記具を示す縦断面図である。It is a longitudinal cross-sectional view which shows the thermochromic writing instrument of 1st Embodiment. 図１における筆記先端部が突出した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which the writing front-end | tip part in FIG. 1 protruded. 図１における一部省略した要部拡大断面図である。It is a principal part expanded sectional view in which a part was omitted in FIG. 図１における摩擦体及び保持部材を示す斜視図である。It is a perspective view which shows the friction body and holding member in FIG. 図３における一部省略した要部Ａ−Ａ断面図である。It is principal part AA sectional drawing abbreviate | omitted in FIG. 図１における摩擦体を使用する状態の一例を示す図である。It is a figure which shows an example of the state which uses the friction body in FIG.

図１〜図５に、第１実施形態の熱変色性筆記具１を示す。熱変色性筆記具１は、軸筒内に収容したボールペンレフィルからなる筆記体１４を、コイルスプリングからなる弾発体１０によって、軸筒本体の後端方向に向かって、摺動自在に付勢して収容してある。軸筒本体は、前軸２、中間軸３、連結具４、後軸６からなり、前軸２と中間軸３とを連結具４を介して装着し、中間軸３の後端部には、長手方向に延びる細長状の窓孔６Ａを形成した後軸６を装着して軸筒本体を得ている。   1 to 5 show a thermochromic writing instrument 1 according to the first embodiment. The thermochromic writing instrument 1 slidably urges a writing body 14 made of a ballpoint pen refill accommodated in a shaft cylinder toward a rear end direction of the shaft cylinder body by an elastic body 10 made of a coil spring. Is housed. The shaft cylinder body includes a front shaft 2, an intermediate shaft 3, a connector 4, and a rear shaft 6. The front shaft 2 and the intermediate shaft 3 are mounted via the connector 4, and the rear end of the intermediate shaft 3 is attached to the rear shaft portion. The shaft cylinder body is obtained by mounting the rear shaft 6 after forming the elongated window hole 6A extending in the longitudinal direction.

軸筒は、前記した軸筒本体と先部材５とかなり、軸筒本体の前軸２の先端部に設けた雄ねじ部に、先部材５を着脱自在に螺着して軸筒を得ている。さらにまた、中間軸３の後端部に形成した係合凸部を、外筒１２の被係合部に落とし込み嵌合して、外筒１２を軸筒本体に外嵌してある。   The shaft cylinder is considerably screwed with the above-described shaft cylinder main body and the tip member 5, and a shaft cylinder is obtained by removably screwing the tip member 5 on a male screw portion provided at the front end portion of the front shaft 2 of the shaft cylinder main body. . Furthermore, the engaging convex part formed in the rear end part of the intermediate shaft 3 is dropped and fitted into the engaged part of the outer cylinder 12, and the outer cylinder 12 is externally fitted to the shaft cylinder main body.

弾発体１０は、先部材５によって、直接、先端部を受け止めてあり、もう一方の端部（後端部）は、筆記体１４のチップホルダー１６に、直接、当接して、筆記体１４を軸筒本体の後端方向に向かって付勢している。   The bullet 10 is directly received by the tip member 5, and the other end (rear end) abuts directly on the chip holder 16 of the writing body 14, and the writing body 14. Is urged toward the rear end of the shaft main body.

後軸６の外周面には、長手方向に延びる細長状の窓孔６Ａが径方向に内外を連通して貫設してあり、この窓孔６Ａから後軸６の外周面から径方向外方に突出するように操作体８が配設される。操作体８は、窓孔６Ａから外方に突出する、クリップ１３を装着する操作部８Ａと、中間軸３の長孔３Ｂを挿通し、回転カム７を先方に移動するとともに回転を誘導するように先端に複数の鋸歯状のカム部（図示せず）を形成した軸部８Ｂとを具備している。   An elongated window hole 6A extending in the longitudinal direction is provided in the outer peripheral surface of the rear shaft 6 so as to communicate with the inside and the outside in the radial direction, and radially outward from the outer peripheral surface of the rear shaft 6 through the window hole 6A. The operating body 8 is disposed so as to protrude in the direction. The operating body 8 is inserted through the operating portion 8A for mounting the clip 13 protruding outward from the window hole 6A and the long hole 3B of the intermediate shaft 3, so as to move the rotating cam 7 forward and induce rotation. And a shaft portion 8B having a plurality of serrated cam portions (not shown) formed at the tip thereof.

後軸６の後端部には保持部材１１を、後軸６の後端部内に設けた雌ねじ部と、保持部材１１の側面に設けた雄ねじ部とを、保持部材１１の後端が、後軸６内に内在するように着脱自在に螺着してある。また、保持部材１１には、熱可塑性エラストマーからなるゴム状弾性を有する白色半透明の摩擦体９を、保持部材１１の内方突起部１１Ａに摩擦体９の装着部９Ｂに設けた外方突起部９Ｃを乗り越し嵌合することによって装着してある。   A holding member 11 is provided at the rear end portion of the rear shaft 6, a female screw portion provided in the rear end portion of the rear shaft 6, and a male screw portion provided on a side surface of the holding member 11. Removably screwed so as to be in the shaft 6. Further, the holding member 11 is provided with a white translucent friction body 9 having a rubber-like elasticity made of a thermoplastic elastomer, and an outward projection provided on the inward projection portion 11A of the holding member 11 on the mounting portion 9B of the friction body 9. It is mounted by fitting over the part 9C.

摩擦体９は、保持部材１１の後端部から外方（後方）に突出する摩擦部９Ａと、保持部材１１に装着する装着部９Ｂとを有し、摩擦部９Ａの側面には、長手方向に延びる窪み状の通溝９Ｄを周方向に離間して４個、設けてある。また、保持部材１１の側面には窪み状の通溝１１を周方向に離間して４個、設けてあり、摩擦部９Ａの通溝９Ｄと保持部材１１の通溝１１Ｂは長手方向で連通し、後軸６後端部の内外を連通している。   The friction body 9 has a friction portion 9A that protrudes outward (rearward) from the rear end portion of the holding member 11, and a mounting portion 9B that is attached to the holding member 11, and the side surface of the friction portion 9A has a longitudinal direction. Four recess-shaped through grooves 9D extending in the circumferential direction are provided in the circumferential direction. Further, four recessed grooves 11 are provided on the side surface of the holding member 11 in the circumferential direction, and the grooves 9D of the friction portion 9A and the grooves 11B of the holding member 11 communicate with each other in the longitudinal direction. The inside and outside of the rear end portion of the rear shaft 6 communicate with each other.

また、摩擦体９の装着部９Ｂの先端部の側面には溝状の凹部９Ｅを周方向に離間して２個、設けてあり、対向する保持部材１１の内面にはリブ状の凸部１１Ｃを周方向に離間して２個、設けてある。摩擦体９を保持部材１１に装着するには、摩擦体９を後軸６の後方側から押し込み、装着部９Ｂの凹部９Ｅ内に保持部材１１の凸部１１Ｃの先端部が挿入した後、保持部材１１の内方突起部１１Ａに摩擦体９の装着部９Ｂに設けた外方突突起９Ｃを乗り越し嵌合し始め、さらに、摩擦体９を押し込むと、乗り越し嵌合が終了し、装着部９Ｂの凹部９Ｅ内に保持部材１１の凸部１１Ｃが配設し、摩擦体９の回転を抑制して装着してある。   Further, two groove-like recesses 9E are provided on the side surface of the tip of the mounting portion 9B of the friction body 9 so as to be spaced apart from each other in the circumferential direction, and the rib-like projections 11C are provided on the inner surfaces of the holding members 11 facing each other. Two are provided apart from each other in the circumferential direction. In order to attach the friction body 9 to the holding member 11, the friction body 9 is pushed from the rear side of the rear shaft 6, and the tip of the convex portion 11C of the holding member 11 is inserted into the concave portion 9E of the mounting portion 9B, and then held. When the outer projecting projection 9C provided on the mounting portion 9B of the friction body 9 starts to ride over the inner projecting portion 11A of the member 11 and the friction body 9 is further pushed in, the over fitting is finished, and the mounting portion 9B The convex portion 11C of the holding member 11 is disposed in the concave portion 9E, and is mounted while suppressing the rotation of the friction body 9.

また、後軸６後端部に保持部材１１を螺着した後、保持部材１１を取り外すのに必要な回転トルクは、４００ｇｆであって、保持部材１１の内面の凸部１１Ｃが、摩擦体９の装着部９Ｂの凹部９Ｅによって、回転方向の移動を規制する回転抑止力よりも小さくしてあるため、摩擦体９を把持して回転することで、保持部材１１を着脱自在に装着することができる。   Further, after the holding member 11 is screwed to the rear end portion of the rear shaft 6, the rotational torque necessary to remove the holding member 11 is 400 gf, and the convex portion 11 </ b> C on the inner surface of the holding member 11 is the friction body 9. Since the rotation restraining force that restricts movement in the rotational direction is made smaller by the concave portion 9E of the mounting portion 9B, the holding member 11 can be detachably mounted by gripping and rotating the friction body 9. it can.

また、後軸６の後端部及び摩擦体９の外側には、内外を連通する貫通孔２０Ａ以外は後端を閉鎖したドーム状の後端部と円筒状の側面からなる黒色の外筒体２０を着脱自在に、後軸６の雄ねじ部に外筒体２０内面の雌ねじ部とを螺着してある。   Further, on the outside of the rear end portion of the rear shaft 6 and the friction body 9, a black outer cylinder body having a dome-like rear end portion and a cylindrical side surface with the rear end closed except for the through hole 20 </ b> A communicating inside and outside. 20 is detachably attached to the external thread portion of the outer cylinder 20 on the external thread portion of the rear shaft 6.

出没機構は、クリップ１３を装着した操作体８を先部材５の先端開口部５Ａ方向にスライドすることによって、軸部８Ｂのカム部、回転カム７からなる従来から知られている回転カムによる出没機構を作動させ、ボールペンチップからなる筆記先端部１７を、先部材５の先端開口部５Ａから出没可能としてある。   The retracting mechanism slides the operating body 8 equipped with the clip 13 in the direction of the distal end opening 5A of the tip member 5 to thereby retract and retract by a conventionally known rotating cam including the cam portion of the shaft portion 8B and the rotating cam 7. The mechanism is operated so that the writing tip portion 17 made of a ballpoint pen tip can be projected and retracted from the tip opening portion 5A of the tip member 5.

筆記先端部１７が先部材５の先端開口部５Ａより没入した状態で、操作体４の操作部を先部材５の先端開口部５Ａ方向にスライドすると、回転カム機構が作動し、筆記先端部１７が突出した状態を維持して筆記することができる。   When the operation part of the operating body 4 is slid in the direction of the front end opening 5A of the front member 5 in a state where the writing front end 17 is immersed from the front end opening 5A of the front member 5, the rotary cam mechanism is activated, and the writing front end 17 Can be written while maintaining the protruding state.

また、筆記体１４の筆記先端部１７が先部材５の先端開口部５Ａから突出した状態で、再度、クリップ１３を装着した操作体８を先部材５の先端開口部５Ａ方向にスライドすることによって、軸部８Ｂのカム部、回転カム７からなる従来から知られている回転カムによる出没機構を作動させ、ボールペンチップからなる筆記先端部１７を、先部材５内に没入することができる。   Further, by sliding the operating body 8 to which the clip 13 is attached in the direction of the front end opening 5A of the front member 5 again in a state where the front end 17 of the writing body 14 protrudes from the front end opening 5A of the front member 5. By operating a conventional rotary cam camshaft mechanism including the cam portion of the shaft portion 8B and the rotary cam 7, the writing tip 17 made of a ballpoint pen tip can be inserted into the tip member 5.

筆記体１４は、ボール抱持室と、ボール抱持室の中央にインキ流通孔と、このインキ流通孔に連通する放射状に延び、チップ後部孔に達しないインキ流通溝を有するとともに、ボール抱持室の底壁に、φ０．５ｍｍのタングステンカーバイド製のボールを載置し、チップ先端部を内側にかしめことにより、ボールの一部がチップ先端縁より突出するように回転自在に抱持したボールペンチップからなる筆記先端部１７を、インキ収容筒１５の先端部に、チップホルダー１６を介して装着してある。また、インキ収容筒１５の後端部には尾栓１９を装着してある。また、ボールの後方には、ボールを常時、押圧するスプリング１８を配設してある。   The cursive body 14 has a ball holding chamber, an ink circulation hole in the center of the ball holding chamber, a radial passage that communicates with the ink circulation hole, and an ink circulation groove that does not reach the chip rear hole. A ballpoint pen that can be rotatably held so that a part of the ball protrudes from the tip edge of the chip by placing a φ0.5mm tungsten carbide ball on the bottom wall of the chamber and caulking the tip of the chip inward. A writing tip 17 made of a chip is attached to the tip of the ink containing cylinder 15 via a chip holder 16. A tail plug 19 is attached to the rear end of the ink storage cylinder 15. Further, a spring 18 that constantly presses the ball is disposed behind the ball.

また、インキ収容筒１５内には、図示はしてないが、レーザー解析よる体積基準での平均粒径が０．５μｍの可逆熱変色性のマイクロカプセル顔料を含有し、ＥＭ型回転粘度計における１ｒｐｍでのインキ粘度が１０２０ｍＰａ・ｓ（２５℃）、１００ｒｐｍでのインキ粘度が８４ｍＰａ・ｓ（２５℃）で、剪断減粘指数が０．４８の熱変色性インキと、このインキの後端に、グリース状のインキ追従体を直に収容してある。   Although not shown in the drawing, the ink container 15 contains a reversibly thermochromic microcapsule pigment having an average particle size of 0.5 μm on a volume basis by laser analysis. A thermochromic ink having an ink viscosity at 1 rpm of 1020 mPa · s (25 ° C.), an ink viscosity at 100 rpm of 84 mPa · s (25 ° C.) and a shear thinning index of 0.48, and a trailing edge of this ink A grease-like ink follower is directly accommodated.

この筆記体１４を筆記すると、筆記先端部１７のボールの回転と、筆圧によって、ボールが底壁側に移動して、チップ先端部の内壁とボールに隙間を生じ、インキを吐出して筆記することができる。   When the writing body 14 is written, the ball moves to the bottom wall side due to the rotation of the ball of the writing tip portion 17 and the writing pressure, a gap is formed between the inner wall of the tip end portion of the ball and the ball, and ink is discharged to write. can do.

筆跡を熱変色するには、図６に示すとおり、外筒体２０を取り外して、摩擦体９の摩擦部９Ａをノート等の筆記面Ｈに筆記した筆跡に圧接し、擦ることで発生する熱によって、熱変色性インキの筆跡を熱消色させることができる。   To thermally change the handwriting, as shown in FIG. 6, the outer cylinder 20 is removed, and the frictional part 9A of the friction body 9 is pressed against the handwriting written on the writing surface H such as a notebook and rubbed. Thus, the handwriting of the thermochromic ink can be thermally decolored.

本実施形態では、軸筒本体と先部材によって軸筒を構成し、便宜上、軸筒本体は、前軸、中間軸、連結具、後軸の４部品で構成しているが、前軸と後軸の２部品等、先部材の有無や部品点数は、特に限定されるものはない。   In this embodiment, a shaft cylinder is constituted by a shaft cylinder main body and a tip member. For convenience, the shaft cylinder main body is constituted by four parts of a front shaft, an intermediate shaft, a connector, and a rear shaft. The presence or absence of the tip member and the number of parts, such as the two parts of the shaft, are not particularly limited.

また、筒体として、回転カムからなる出没機構を具備した出没式筆記具の軸筒（後軸）を例示しているが、筆記具を構成する筒体であれば、回転繰り出し等、出没機構は特に限定されるものではなく、キャップ式筆記具の軸筒やキャップ、ノック体を筒体としてあってもよい。また、操作体としてクリップを例示してあるが、操作体の形状やクリップの有無は特に限定されるものではない。但し、操作体の操作部やクリップの幅を摩擦体の最大幅よりも小さくすることで、摩擦体の使用時に、筆記面上の筆跡を視認し易いので、好ましい。   In addition, as a cylinder, a shaft cylinder (rear shaft) of a retractable writing instrument provided with a retracting mechanism composed of a rotating cam is illustrated. However, if the cylinder constitutes the writing instrument, the retracting mechanism such as rotation feeding is particularly It is not limited, You may have a cylinder, a cap, and a knock body of a cap-type writing instrument as a cylinder. Moreover, although the clip is illustrated as an operation body, the shape of an operation body and the presence or absence of a clip are not specifically limited. However, it is preferable to reduce the width of the operation portion and the clip of the operation body to be smaller than the maximum width of the friction body because the handwriting on the writing surface can be easily seen when using the friction body.

また、本実施形態では、保持部材を後軸内に内在して装着することで、摩擦部の視認性が向上するので好ましいが、筒体後端部（一方の端部）であれば、保持部材の装着場所は特に限定されるものではない。また、凸部と凹部による摩擦体の回転抑制構造は、複数個設けることが好ましく、本実施形態では、周方向に離間して２箇所に配設しているが、１個、３個等、数は特に限定されるものでない。   Further, in the present embodiment, it is preferable that the holding member is mounted in the rear shaft so that the visibility of the friction portion is improved. However, if the cylindrical member is the rear end portion (one end portion), the holding member is held. The mounting location of the member is not particularly limited. In addition, it is preferable to provide a plurality of friction body rotation suppression structures by the convex portions and the concave portions, and in this embodiment, the friction body rotation suppression structures are arranged at two locations apart in the circumferential direction. The number is not particularly limited.

また、外筒体の装着構造は、本実施形態のように、後軸に設けた雄ねじ部と外筒体内面の雌ねじ部とを螺着することが、繰り返しの着脱による装着力の低下が抑制できるので好ましいが、凹凸嵌合、乗り越し嵌合、圧入装着など、摩擦体を保護する構造であれば、後軸と外筒体の装着構造は着脱自在であれば、特に限定されるものではない。   In addition, the outer cylinder mounting structure, as in this embodiment, can be achieved by screwing the male threaded portion provided on the rear shaft and the female threaded portion on the inner surface of the outer cylindrical body to prevent a decrease in mounting force due to repeated attachment and detachment. However, as long as it is a structure that protects the friction body, such as concave-convex fitting, overpass fitting, and press-fit mounting, the mounting structure of the rear shaft and the outer cylinder is not particularly limited as long as it is detachable. .

外筒体の形状も特に限定されるものではなく、実施形態のように、一端を閉鎖して摩擦体の側面及び後端部の略全体を覆う形状とし、摩擦体を保護することが最も好ましいが、一端を開口し、開口端を摩擦部とした形状であってもよい。   The shape of the outer cylinder is not particularly limited, and it is most preferable to protect the friction body by closing one end and covering substantially the entire side surface and rear end of the friction body as in the embodiment. However, the shape which opened one end and made the opening end the friction part may be sufficient.

また、外筒体の色を軸筒と略同色又は同系色とすると、軸筒と外筒体との一体感が得られやすく好ましいが、外筒体の色は特に限定されるものではない。また、摩擦体の色は、特に限定されるものではないが、無色透明、無色半透明色、白色等とすることで、部品の共通化等のコストダウンに繋がるため、好ましい。   Further, when the color of the outer cylinder is substantially the same color or a similar color to the shaft cylinder, it is preferable that a sense of unity between the shaft cylinder and the outer cylinder is easily obtained, but the color of the outer cylinder is not particularly limited. Further, the color of the friction body is not particularly limited, but it is preferable to use colorless and transparent, colorless and translucent color, white, etc., because it leads to cost reduction such as common use of parts.

本発明の熱変色性筆記具は、利便性を考慮して出没式筆記具とすることが好ましいが、キャップ式筆記具等、熱変色性筆記具として広く利用可能である。   The thermochromic writing instrument of the present invention is preferably an in / out type writing instrument in consideration of convenience, but can be widely used as a thermochromic writing instrument such as a cap type writing instrument.

１ 熱変色性筆記具
２ 前軸
３ 中間軸
３Ａ 当接部
３Ｂ 長孔
４ 連結具
５ 先部材
６ 後軸
６Ａ 窓孔
７ 回転カム
８ 操作体
８Ａ 操作部
８Ｂ 押圧部
９ 摩擦体
９Ａ 摩擦部
９Ｂ 装着部
９Ｃ 外方突部
９Ｄ 通溝
９Ｅ 凹部
１０ 弾発体
１１ 保持部材
１１Ａ 内方突起部
１１Ｂ 通溝
１１Ｃ 凸部
１２ 外筒体
１３ クリップ
１４ 筆記体
１５ インキ収容筒
１６ チップホルダー
１７ 筆記先端部
１９ 尾栓
２０ 外筒体
２０Ａ 貫通孔 DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Front shaft 3 Intermediate shaft 3A Contact part 3B Long hole 4 Connection tool 5 Front member 6 Rear shaft 6A Window hole 7 Rotating cam 8 Operation body 8A Operation part 8B Press part 9 Friction body 9A Friction part 9B Installation Portion 9C Outward protrusion 9D Through groove 9E Recess 10 Ejection body 11 Holding member 11A Inner protrusion 11B Through groove 11C Convex portion 12 Outer cylinder 13 Clip 14 Writing body 15 Ink storage cylinder 16 Tip holder 17 Writing tip 19 Tail plug 20 Outer cylinder 20A Through hole

Claims (3)

筆記具を構成する筒体の一方の端部に、熱変色性インキの筆跡を摩擦し、その際に生じる摩擦熱で前記熱変色性インキの筆跡を熱変色可能なゴム状弾性を有する軟質樹脂からなる摩擦体を、保持部材を介して着脱自在に装着してなる熱変色性筆記具であって、前記摩擦体が、少なくとも前記筒体の一方の端部の内面に装着する装着部と、前記筒体又は保持部材の一方の端部から外方に突出し、前記熱変色性インキの筆跡を摩擦する摩擦部とを有し、前記筒体の後端部内に設けた雌ねじ部と、保持部材の側面に設けた雄ねじ部とを、保持部材の後端が、前記筒体内に内在するように着脱自在に螺着してあり、前記摩擦体の装着部の側面に、凹部又は凸部を周方向に離間して複数個、設け、前記筒体又は保持部材の内面に、凸部又は凹部を周方向に離間して複数個、設けるとともに、前記装着部の凹部内に、前記筒体又は保持部材の凸部を配設、または前記筒体又は保持部材の凹部内に、前記装着部の凸部を配設してなり、前記摩擦部の側面に、長手方向に延びる窪み状の通溝を設け、前記保持部材の雄ねじ部の側面に、窪み状の通溝を設けてあり、前記摩擦部の通溝と保持部材の雄ねじ部の通溝が長手方向で連通させ、前記保持部材を取り外すのに必要な回転力が、２００ｇｆ・ｃｍ以上であることを特徴する熱変色性筆記具。 From a soft resin having rubber-like elasticity that can rub the handwriting of the thermochromic ink on one end of the cylindrical body constituting the writing instrument and thermally change the handwriting of the thermochromic ink with the frictional heat generated at that time. A thermochromic writing instrument in which the friction body is detachably mounted via a holding member , wherein the friction body is mounted on at least an inner surface of one end of the cylinder, and the cylinder A female screw portion provided in a rear end portion of the cylindrical body, and a side surface of the holding member, having a friction portion protruding outward from one end portion of the body or the holding member and rubbing the handwriting of the thermochromic ink The holding screw is removably screwed so that the rear end of the holding member is in the cylindrical body, and the concave portion or the convex portion is circumferentially provided on the side surface of the mounting portion of the friction body. A plurality of spaced apart parts are provided, and convex portions or concave portions are provided in the circumferential direction on the inner surface of the cylindrical body or the holding member. A plurality of them are provided apart from each other, and a convex portion of the cylindrical body or the holding member is disposed in a concave portion of the mounting portion, or a convex portion of the mounting portion is disposed in the concave portion of the cylindrical body or the holding member. A recess-like through groove extending in the longitudinal direction is provided on the side surface of the friction portion, and a recess-like through groove is provided on the side surface of the male screw portion of the holding member. A thermochromic writing instrument characterized in that the through groove of the male screw portion of the holding member communicates in the longitudinal direction and the rotational force required to remove the holding member is 200 gf · cm or more . 前記保持部材を取り外すのに必要な回転力が、４００ｇｆ・ｃｍ以上、１０００ｇｆ・ｃｍ以下であることを特徴とする請求項１に記載の熱変色性筆記具。 The thermochromic writing instrument according to claim 1, wherein a rotational force required to remove the holding member is 400 gf · cm or more and 1000 gf · cm or less . 前記摩擦体の側面の外側に、外筒体を着脱自在に配設したことを特徴とする請求項１または２に記載の熱変色性筆記具。 The thermochromic writing instrument according to claim 1 or 2, wherein an outer cylindrical body is detachably disposed outside the side surface of the friction body.

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