JP6888925B2 - 筆記具 - Google Patents
筆記具 Download PDFInfo
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- JP6888925B2 JP6888925B2 JP2016163761A JP2016163761A JP6888925B2 JP 6888925 B2 JP6888925 B2 JP 6888925B2 JP 2016163761 A JP2016163761 A JP 2016163761A JP 2016163761 A JP2016163761 A JP 2016163761A JP 6888925 B2 JP6888925 B2 JP 6888925B2
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Description
筆記部は、軸筒から筆記用インクを誘導し、筆記可能な筆記体と、筆記体を保持する保持体とを有しており、保持体は視認性を有する材料で形成され、前記筆記体は複数の平面部を有することを特徴とする筆記具である。
また、複数の平面部は、平面部と角部と曲面部が形成されていることが好適である。
また、前記保持体は、軸線方向に垂直な断面での肉厚が、最厚部が1mm以上、或いは前記筆記体の外径と前記保持体の外径の比が1対3以上となることが好適である。
図1〜図5は、本発明の第1実施形態に係る化粧具の説明図である。
図1(c)に示すように、前記筆記具は、筆記具本体となる軸筒10内に筆記用インク吸蔵体12が収納され、その筆記用インク吸蔵体12に液体筆記用インクが吸蔵されるタイプのものである。軸筒10は後端の閉じた筒状を呈している。前記軸筒10の後部の内部には、前記筆記用インク吸蔵体12を支持するリブ10aが内向きに突出形成されている。
なお、図1(b)の符号LDは軸筒10の長手方向(軸方向)を示している。
支持部材18は、図1(b)に示すように、上記筆記用インク誘導部16を周囲に固定して、軸筒10の先軸20先端開口部に固着されるものである。
図5(a)〜(h)に示すように、支持部材18は、概略膨出状の本体部18aと、該本体部18aの先方側に、環状に拡径したフランジ部18bと、フランジ部18bから概略板状先方に延びる構造の、透明であって筆記方向を視認することができる可視部18cとを有する。また、前記支持部材18は、該本体部18aの後方側に、上記本体部18aに連設される保持片18dを有する後方保持部18eを備えたものである。また、これらの各部から構成される支持部材18の長手方向外周面全体には、上記コ字型状の筆記用インク誘導部16を嵌入保持する保持溝18fが形成されている。
次に、本発明の第2実施形態に係る筆記具を説明する。
図7に示す筆記用インク誘導部16は、図3の曲面部16cに比較して大きな弧を描いている。また、前記筆記用インク誘導部16の先端(角部16aから16cの間の領域)の横断面が異形であり、中央部から後部にかけて横断面が円形である。
したがって、筆記に際して曲線部16cの筆記幅と角部16aの筆記幅との差が強調され、メリハリのある筆記が可能となる。その他の作用・効果は第1実施形態と同じである。
また、前記第2実施形態の筆記具では、支持部材18に取り巻くように支持され筆記用インク誘導部16は線状でありその横断面がほぼ円形であるが、横断面をほぼ多角形状としてもよい。
次に、本発明の第3実施形態に係る筆記具を説明する。
次に,実施形態に係る筆記具に使用する筆記用インクを説明する。
本発明の筆記用インク組成物は、(イ)電子供与性呈色性有機化合物、(ロ)電子受容性化合物、(ハ)前記両者の呈色反応の生起温度を決める反応媒体からなる可逆熱変色性組成物を内包させた可逆熱変色性マイクロカプセル顔料と、前記可逆熱変色性マイクロカプセル顔料とは比重の異なるマイクロカプセル粒子と、水と高分子凝集剤を含むビヒクルとからなり、前記マイクロカプセル粒子に内包される成分が可逆熱変色性マイクロカプセル顔料に内包される(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であり、表面張力が30〜40mN/mの範囲にあり、トリメチルグリシンと、ペンタエリスリトールとを含有することを特徴とする熱変色性インクである。
ジオールジメチルエーテル、ドデカンジオールジメチルエーテル、トリデカンジオールジメチルエーテル、デカンジオールジエチルエーテル、ウンデカンジオールジエチルエーテル等を挙げることができる。 前記マイクロカプセル顔料(円形断面形状のものを含む)の最大外径の平均値が5.0μmを越えると毛細間隙からの流出性の低下を生じ易く、最大外径の平均値が0.5μm未満では高濃度の発色性を示し難くなる。可逆熱変色性組成物の壁膜に対する比率が前記範囲より大になると、壁膜の厚みが肉薄となり過ぎ、圧力や熱に対する耐性の低下を生じ易く、壁膜の可逆熱変色性組成物に対する比率が前記範囲より大になると発色時の色濃度及び鮮明性の低下を生じ易くなる。
なお、平均粒子径の測定は、粒子径測定器N4Plus(COULTER社製)を用いて測定した。測定時には試料がN4Plusの推奨濃度に到達するまで水で希釈して、25℃の温度条件で測定した。
この含有量が0.5%未満であると、ペン先の乾燥抑制効果が充分でなく、一方、50%超過であると、効果はそれほど変わらず、むしろ粘度増加による筆記性能、保存安定性の低下をもたらすこととなる。
この含有量の含有量が0.5%未満であると、ペン先の乾燥抑制効果が充分でなく、また、トリメチルグリシンとの相乗作用を発揮することができず、一方、8%超過であると、トリメチルグリシンとの相乗作用の効果はそれほど変わらず、低温下における析出や、保存安定性の低下をもたらすこととなる。
すなわち、本発明の筆記用インクでは、共に、トリメチルグリシンと、ペンタエリスリトールとがペン先の耐乾燥性を抑える成分となるものであり、これらの各単独使用よりも、筆記用インク組成中で併用することにより、相乗的に作用していることは明らかである。その理由は必ずしも明らかではないが、相乗効果によりペン先の乾燥を抑えながらも、描線の乾燥性、インクの低温安定性に優れ、描線に滲みや裏抜けのない優れた性能を発揮せしめるものと推測される。
本発明の筆記用インクは、本発明の効果を発揮せしめる持続効果が極めて優れており、しかも、その効果の発現期間・持続時間も長く、更にトリメチルグリシンとペンタエリスリトールは水溶性であるために経時的な安定性にも優れたものとなる。
10a リブ
12 筆記用インク吸蔵体
14 筆記部(第1実施形態、第2実施形態)
14A 筆記部(第3実施形態)
16 筆記用インク誘導部(第1実施形態、第2実施形態に係る筆記体)
16A 筆記用インク誘導部(第3実施形態に係る筆記体)
18 支持部材(第1実施形態、第2実施形態に係る保持体)
18A 支持部材(第3実施形態に係る保持体)
20 先軸
22 筆記多孔体
Claims (3)
- 筆記用インクを収容した軸筒と、前記軸筒の一端に装着された筆記部とを有する筆記具において、
前記筆記部は、前記軸筒から筆記用インクを誘導して、該筆記用インクを筆記可能な筆記体と、当該筆記体を保持する保持体とを有しており、前記保持体は視認性を有する材料で形成し、前記筆記体は複数の平面部が形成されるとともに、前記筆記用インクは、トリメチルグリシンと、ペンタエリスリトールを含んだ熱変色性インクであることを特徴とする筆記具。 - 複数の平面部は、平面部と角部と曲面部が形成されているとともに、前記筆記体は気孔率60%以上のナイロン樹脂で形成されていることを特徴とする請求項1記載の筆記具。
- 摩擦体を軸筒に備えたことを特徴とする請求項1又は2記載の筆記具。
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