JP3673212B2

JP3673212B2 - Ceramic composite cone nib

Info

Publication number: JP3673212B2
Application number: JP2001367088A
Authority: JP
Inventors: 宜彦島田
Original assignee: 株式会社バーテックス
Priority date: 2001-11-30
Filing date: 2001-11-30
Publication date: 2005-07-20
Anticipated expiration: 2021-11-30
Also published as: JP2003165293A

Description

【０００１】
【発明の属する技術分野】
本発明は、耐久性に優れたセラミックス材を使用したセラミックス複合円錐形ペン先に関する。
【０００２】
【従来の技術】
従来から、ペン先先端の耐久性の高い筆記具として万年筆が知られている。万年筆のペン先の場合、先端に耐摩耗性合金を溶着し、切割りした後、角を研磨して丸みを付けた構造になっている。また、このようなペン先構造に続く耐摩耗性の高いペン先として、セラミックス製のペン先が注目されている。この種のペン先としては、実開昭６０−８０８５号公報、実開昭６０−１０９９７９号公報、実開平１−８６５７８号公報、特開平１−１４６７９７号公報等に開示されているように、セラミックス材の板状のものに溝を切り、その先端に丸みを付けたもの、また棒状のペン体に貫通孔を設けて先端まで導出孔としたもの等が提案されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来のセラミック製のペン先では、セラミックス材が硬質であり、金属製の板状の成型ペンのように撓むことができないため、インキを導出するために、溝又は貫通孔等を設けているが、このような溝や貫通孔等では、インキの乾きによるインキの粘度変化又はかす溜り等に対応できず、インキ切れを起こすという問題があり、さらに筆端部と紙面との接触により微細なゴミ、紙くず等が発生し、これがペン体のインキ通路を塞いだ場合に掃除手段がほとんどないために、筆記が不安定にならざるを得ないという問題がある。これらの問題はセラミックス製のペン先が耐久性の高い材料を使いながら実用化できず、セラミックス製ペン先を使用したペンが実用的筆記具として市販できない大きな原因になっている。
本発明は、このような従来の問題を解決するもので、ペン先先端部にセラミックス材を使用してペン先先端の耐久性を高めるとともに、筆記時に滑らかな筆感と筆跡とを得ることができ、またペン先先端部が硬質のセラミックス材でありながら、インキの乾きによるインキの粘度変化又はかす溜りに対応してインキ切れを防止できるとともにゴミ、紙くず等がインキ通路に付着した場合でもこれを確実に除去して筆記を安定させることができ、併せて紙面への接触感が柔らかく、紙面に対してどの角度でも書け、ペンの軸心を中心に回動してもどの位置でも書くことのできる優れたセラミックス複合円錐形ペン先を提供することを目的とする。
【０００４】
【課題を解決するための手段】
上記目的を達成するために、本発明のセラミックス複合円錐形ペン先は、筒形状の基部とその一端側軸心の円周上に形成されて全体を先端方向に向けて漸次略円錐形に収束可能な複数の櫛歯状片とこれら櫛歯状片の先端に形成されて全体を略半球状の頂部として収束可能な複数の半球分割部とを有するペン先基本体と、ペン先基本体の外周上に嵌合可能な筒形に形成され、複数の櫛歯状片とその半球分割部とを収束可能な収束部材とを備え、各櫛歯状片は半球分割部を含む先端側の前部片とその後部側の後部片とからなり、前部片をセラミックス材により形成され、後部片を合成樹脂材又は金属材により弾性的に変形可能に形成され、ペン先基本体が収束部材により収束されて、各櫛歯状片間にインキ導出路が構成されるとともに、その先端に半球状の筆端部が構成されるものである。
この構成により、ペン先先端部にセラミックス材を使用するので、ペン先先端部の耐摩耗性が高く、ペン先の耐久性を高めることができるとともに、筆記時に滑らかな筆感と筆跡とを得ることができる。また、筆圧に応じて筆端部の各半球分割部がその後部片の弾性変形によりずれ合い、弾性的に変形することにより、ペン先先端部が硬質のセラミックス材でありながら、インキの乾きによるインキの粘度変化又はかす溜りに対応してインキ切れを防止できるとともに、ゴミ、紙くず等がインキ通路に付着した場合でもこれを確実に除去して筆記を安定させることができる。さらに、この筆端部の弾性変形により、紙面への接触感が柔らかく、紙面に対してどの角度でも書け、ペンの軸心を中心に回動してもどの位置でも書け、また筆圧を強くすれば太く、弱くすれば細く書くことができる。
本発明はまた、次のように具体化される。
第１に、ペン先基本体の櫛歯状片の数を５本乃至８本に設定される。
第２に、基部は各櫛歯状片の後部片とともに合成樹脂材又は金属材により一体に形成される。
第３に、前部片と後部片との結合面の一方に係止突起を具備し、その他方に係合凹部を具備し、これら係止突起と係合凹部との係合により前部片と後部片とを結合される。
【０００５】
【発明の実施の形態】
以下、本発明の実施の形態について、図１から図１６を用いて説明する。
（実施の形態１）
図１は本発明の第１の実施の形態におけるセラミックス複合円錐形ペン先（以下、単にペン先という。）の全体構成を示している。図１において、１はペン先であり、ペン先基本体２と、収束部材３とを備える。
【０００６】
ペン先基本体２は、図２に示すように、円筒形に形成された基部２１と、その一端側軸心の円周上に沿って等間隔に形成されて全体を先端方向に向けて漸次略円錐形に収束可能な複数の櫛歯状片２２と、これらの櫛歯状片２２の先端に形成されて全体を半球状の頂部として収束可能な複数の半球分割部２３とを備える。ここでペン先基本体２には５本乃至８本の櫛歯状片２２が設けられる。これらの櫛歯状片２２は半球分割部２３を含む先端側の前部片２２１とその後部側の後部片２２２とにより構成される。なお、前部片２２１と後部片２２２に略同じ長さが設定される。
【０００７】
図３に示すように、基部２１は各櫛歯状片２２の後部片２２２とともに、弾力性を有する合成樹脂材を用いて射出成型により一体成形される。基部２１は、その外形上、大径部２１１と小径部２１２とからなり、両者の境界に段差部２１３を有している。各櫛歯状片２２の後部片２２２は基部２１の大径部２１１側の一端面の外周に沿って等間隔に断面円弧状に連続し、軸心方向と略平行に直線的に突出され、各後部片２２２間にはスリット状の溝２４が設けられる。このようにして各後部片２２２は、図４に示すように、その断面形状が略円柱形に分割形成され、一定の湾曲形状を保ちつつ基部２１に連続される。この形態により、各後部片２２２は基部２１との境界部分を固定端とする片持板、言い換えれば一端固定の片持梁と同じ構造をなす。したがってこの基部２１と５本乃至８本の後部片２２２の一体成形品は常態において各後部片２２２間が開いた状態になっていて、これらの後部片２２２が外周方向から軸心に向けて押圧されることにより内方へ窄められ、全体がほぼ円柱形状を維持しながら収束される。また、図３に示すように、各後部片２２２の先端側に前部片２２１を結合するための係合溝２２３が設けられる。この係合溝２２３は後部片２２２の先端面から軸方向に全長の３分の１程度の長さに断面逆Ｔ字形に形成され、図４に示すように、外周面側の幅狭の溝２２４とその奥側の幅広の溝２２５とを有する。
【０００８】
図３に示すように、各櫛歯状片２２の前部片２２１は先端の半球分割部２３とともにセラミックス材により形成される。この場合、セラミックス材（ジルコニア、アルミナ、窒化珪素、炭化珪素等の粉末）が金型で圧縮成形あるいは射出成形等、成型加工により加圧成形されて全体の形が作られ、これが１３００℃〜１５００℃の高温にて焼成固化される。各前部片２２１は各後部片２２２に連続可能に、図５に示すように、断面円弧状に形成されるとともに、図３に示すように、全体が先端に向けて徐々に幅狭の先細に、かつ先端に向けて徐々に軸心に近接する方向に傾斜されて形成される。また、先端の半球分割部２３は櫛歯状片２２の数によって半球状の１／５〜１／８の分割形状をなす。各半球分割部２３の外面角部、すなわち半球分割部２３の外面とその側面との間に形成された角はブラスト掛け、バレル研磨、バフ磨き等により研磨され、各半球分割部２３が紙面に接した時に角が引っ掛らないような丸み（Ｒ面）が付けられる。この半球分割部２３の外面角部のＲ取りは前部片２２１を後部片２２２に結合する前に予めバレル研磨等により行ってもよく、前部片２２１を後部片２２２に結合した後に行ってもよい。
【０００９】
また、各前部片２２１の後端側に各後部片２２２の係合溝２２３に係合可能な係止突起２２６が設けられる。この係止突起２２６は後部片２２２の係合溝２２３に対応する断面逆Ｔ字形に形成され、図６に示すように、後部片２２２の外周面側の溝２２４とその奥側の溝２２５に嵌合可能な幅狭の係止突状部２２７と幅広の係止突状部２２８とを有する。図７に示すように、各前部片２２１の係止突起２２６を各後部片２２２の係合溝２２３に前方から合わせ、押し込みながら挿入して係止突起２２６を係止溝２２３へ嵌合（係合）させることにより、各前部片２２１が各後部片２２２の先端延長上に連続的に結合される。なお、この結合作業は主として組合わせ機械で行われるが、手作業も可能である。
【００１０】
このようにして５本乃至８本の櫛歯状片２２は合成樹脂製の各後部片２２２とセラミックス製の各前部片２２１が複合一体化され、各櫛歯状片２２間に一定の隙間を介して軸心の周囲に配列されて、常態として各櫛歯状片２２間が開いた形となる。セラミックス製の前部片２２１全体は硬く、曲がることはないが、この前部片２２１が弾力性を有する合成樹脂製の後部片２２２と複合一体化されたことで、櫛歯状片２２の軸心方向の押圧または引き上げ操作により前部片２２に後部片２２２の曲げや撓みに追従した動きを可能とする。
【００１１】
なお、このペン先基本体２においては、複数の櫛歯状片２２が一定の間隙（スリット状の溝２４）をもって円周上に配置され、各櫛歯状片２２を円錐形に近い形に収束せず先端側を比較的開いた状態にしていることで、各櫛歯状片２２の後部片２２２に前部片２２１を複合一体化する際に、余裕をもった間隔で両者を結合することができ、その操作を容易にしている。また、このペン先基本体２の製造に際し、型の製作が容易になり、特に、各櫛歯状片２２の各後部片２２２の間隔が溝２４によって保たれていることで、射出成型上、および型の製作上、特にキャビティのヒレ状突起の厚み、幅などの寸法を十分に取り、射出圧力、型の強さなどに耐える寸法を確保している。さらに、前部片２２１の先端部が筆端部４となるため、前部片２２１の先端部から角を取る必要から、各櫛歯状片２２先端の半球分割部２３間が開いているのを利用して、各半球分割部２３の外面角部にブラスト掛け、バレル研磨、バフ磨き等の研磨を容易に行え、それぞれ頂部を滑らかに形成できる。これにより、半球状に収束される各半球分割部２３の角をなくし、ペン先としてその頂部が紙面に接したときに引っ掛かりを防止し、円滑性を高めている。
【００１２】
一方、収束部材３は、図１に示すように、ペン先１をペン軸体５の胴部５１に装着するマウスピースとして形成される。この収束部材３、すなわちマウスピース３は、合成樹脂により一体成形され、その内周に、ペン先基本体２の基部２１に対応する固定部と、ペン先基本体２の各櫛歯状片２２の後部片２２２を加圧して各後部片２２２を略円柱形に、各前部片２２１を略円錐形に、各半球分割部２３を略半球状に収束可能な内径（すなわち、常態の櫛歯状片２２の後部片２２２外周の外径よりも小さい寸法）を設定した絞り部とを備える。また、この収束部材３を、図８に示すように、金属パイプにより形成してもよい。この場合、収束部材３はペン先基本体２の中間部分に嵌合可能な円筒形に形成され、その内周に各櫛歯状片２２を軸心方向に押圧し、先端方向に漸次縮径する円錐形に収束可能な段差構造を有する。
【００１３】
ペン先１は、このようなペン先基本体２と収束部材３とを構成部品として備え、図１又は図８に示すように、収束部材３をペン先基本体２の先端から通してペン先基本体２の周囲に嵌め込み、収束部材３がペン先基本体２の基部段差部２１３に衝接するまでスライドされて組み付けられる。このようにして収束部材３がペン先基本体２の５本乃至８本の櫛歯状片２２の後部片２２２上に固定され、この収束部材３の前部内周により複数の櫛歯状片２２の各後部片２２２が外側から軸心に向けて押圧され、平均した圧力により収束される。すなわち各櫛歯状片２２は先端にいくに従って内方に加圧収束され、各櫛歯状片２２の略中央から後端に相当する各後部片２２２が歪みのない略円柱形状に収束されるとともに、各櫛歯状片２２の略中央から先端に相当する各前部片２２１が漸次縮径する歪みのない略円錐形状に収束される。このようにして、相互に隣接する櫛歯状片２２同士が弾性的に接触し、図９、図１０に示すように、櫛歯状片２２の両サイドの合わせ部、すなわち隣合う櫛歯状片２２の間が先端にいくに従って狭められて毛細管的隙間をなし、インキ導出路２３１が構成される。さらにその先端の隣り合う半球分割部２３が隙間なく当接して集合され、そこに凹凸のない滑らかな半球形状の筆端部４が構成される。この筆端部４は、櫛歯状片２２の先端が複数個円形にまとめられ、断面花びら状に形成されて、その外周部が筆記時において紙面に押接されて文字を書くための筆記部分になる。なお、図１１に示すように、ペン先基本体２の中空内にその先端まで内面に接してインキ誘導芯５２が挿入配置される。インキがこのインキ誘導芯５２を通って供給され、ペン先基本体２の内面まで到達し、これが毛細管状の隙間、すなわちインキ導出路２３１を通じて内面からその外面、すなわち先端半球状の頂部の表面まで伝達される。半球状の筆端部４が紙面に接することにより、インキが紙面に移り、筆記が可能となる。なお、ペン先１の先端内面に設けたインキ誘導芯５２より先端外面にインキを導き易くするために積極的に衝合部（隣合せた先端部衝合面間）に隙間を作ることが必要で、衝合部の断面形状を内面端では隣同士を当接し、外面端では隣同士隙間が生ずるような構成とすることが好ましい。
【００１４】
次に、上記ペン先１を利用した筆記具による筆記動作について図１１から図１５を用いて説明する。なお、図１１はペン先１の筆端部４が紙面に接した状態を示す。図１２（ａ）、図１２（ｂ）、図１３はペン先基本体２に６本の櫛歯状片２２を備え、先端の半球状の筆端部４を６個の半球分割部２３で構成した場合の動作例を示し、図１４（ａ）、図１４（ｂ）、図１５はペン先基本体２に５本の櫛歯状片２２を備え、先端の半球状の筆端部４を５個の半球分割部２３で構成した場合の動作例を示す。このペン先１においては、各櫛歯状片２２が円錐形を構成する分割片であり、それぞれ先端が独立した形になっている。すなわち、複数の櫛歯状片２２の一片は先端に半球状の形状を複数に均等に分割されたうちの１つの成形形状をもち、また櫛歯として円筒形の基部２１に接続するまでの途中の断面形状が、円錐形に分割され、湾曲した形状をもちつつ基部２１に連続し、基部２１との境界部分を固定端とする片持板、言い換えれば一端固定の片持梁と同じ構成になっている。すなわち、先端の半球状の筆端部４は複数の半球分割部２３が集合し、隣り合う半球分割部２３の当接面でずれ合い、変形可能となる。したがって、筆記具によって書記する場合等において、ペン先１に筆圧がかかることにより櫛歯状片２２の先端に押し上げ力（撓み力）が働けば、櫛歯状片２２が収束部材３で固定された部位を支点に撓み変形（弾性変形）し、半球分割部２３がずれ合い、筆端部４の外径が拡大される。このずれ方は筆圧に応じて変わる。また、この押し上げ力（筆圧）がなくなれば櫛歯状片２２は元の形状に復帰し、半球分割部２３が元に戻される。また、このペン先１は、櫛歯状片２２の前部片２２１が硬質のセラミックス材で作られていて、これ自体は弾力が無いが、この前部片２２１を固定する後部片２２２が弾力性のある合成樹脂材によって成形されているため、櫛歯状片２２として撓み、曲がることが可能になっている。この弾力が筆記時のペン先１の紙面への接触を柔らげ、セラミックスのような硬質の材料を使いながら筆記具を握る手にタッチの柔かい感触を付与する。
【００１５】
この筆記具による筆記を行なうために、図１１に示すようにペン先１を紙に対し通常４５°〜６０°程度の実用範囲で当てると、（この筆記の圧力で）紙面との当接面側に対応するペン先１の筆端部４の接合隙間、すなわちインキ導出部２３１の先端部分内側まで達しているインキは紙面と筆端部４の接触面に生じる毛細管現象によって吸い出され、紙面にインキが伝えられて線を書くことができる。このときの筆圧による半球形状の筆端部４の弾性変形作用が図１２乃至図１５に示されている。
【００１６】
図１２、図１３は円錐形の部分が６本の櫛歯状片２２で構成されたペン先１の筆端部４の、筆記動作にともなう形状変化を表し、図１４、図１５は円錐形の部分が５本の櫛歯状片２２で構成されたペン先１の筆端部４の、筆記動作にともなう形状変化を表す。図１２において、（ａ）はペン先１の先端において櫛歯状片２２の１つが真下にくるようにペンが紙面に向けられている状態の下で、ペン先１の筆端部４がまだ紙面に接していないか、或いは軽く接していて圧力が加わっていないときの、当該筆端部４の状態を示す。この場合は、櫛歯状片２２のいずれにも撓み力が加わらないため、各櫛歯状片２２は互いに弾性的に接触している。次に、筆記者が文字等を書くために力を加えると、この筆記を行なうときの圧力により、筆端部４はペン先基本体２の基部２１上のマウスピース３に固定された部位を支点に櫛歯状片２２の先端として撓み、上側に移動するが、櫛歯状片２２の材料の剛性により抵抗力が生じ、通常の筆記をするときの圧力では先端部は所定の寸法の移動、すなわち変位に止どまる。この変位は例えば０．１〜０．５ミリメートル（ｍｍ）である。このとき、半球状の筆端部４を正面からみると、図１２（ｂ）に示すように、この筆端部４を構成している複数の櫛歯状片２２のうちペンの下側に位置する１つの櫛歯状片２２の先端が押し上げられ、対向位置にある（上側の）櫛歯状片２２を押し上げるとともに（左右）両側位置にある櫛歯状片２２を左右に押し広げることによって半球形状が変形し、全体として筆端部４がずれる。
【００１７】
これにより、総体的にみて、半球部分の外径および紙面に接する面積が大きくなり、図１２（ｂ）中、斜線で表わされたペン先が紙面に接触する領域Ａは図１２（ａ）に斜線で表わされた領域Ａよりも拡大する。この拡大の度合はペン先１を紙面に押しつける圧力、すなわち筆圧が大きいほど高くなる。半球状の筆端部４は半球分割部２３が横にずれた分だけその外径が拡大するため、この接触面に毛細管現象で伝達されるインキの広がる範囲は大きくなり、その結果筆跡の幅が大きくなる。反対に筆圧が小さくなれば、筆跡幅は小さくなる。すなわち、筆記されるときの線の太さは、筆端部４の外径に依存し、その半球形状が拡大する程度に応じて拡大するから、筆圧の大小により線の幅が太い、または細いものとして筆記される。筆圧を種々に変化させれば、毛筆のような線の幅が変化する種々の態様の文字も筆記できる。さらに、図１２（ｂ）、図１３に示すように、紙面に当たる部分が異なるような中心軸の周囲のどの位置に回転しても先端半球部に斜めに紙面が接した場合には、先端半球部が微拡大され、上記と同様の作用効果を奏することになる。しかも、筆記圧の強弱に応じて、櫛歯状片２２全体が撓み、筆圧が大きくてもその力を櫛歯状片２２全体が吸収するクッション作用を生ずる。
【００１８】
図１３は、図１２（ａ）、（ｂ）の場合と異なり、ペン先１の先端において２つの櫛歯状片２２の境界に当たる部位のインキ導出部２３１の１つが真下にくるようにペンが紙面に向けられている状態の下で、ペン先１の筆端部４に圧力が加わったときの、当該筆端部４の変形状態を示す。この場合は、半球状の筆端部４を正面からみると、筆記を行なうときの圧力により、筆端部４を構成している複数の櫛歯状片２２のうちペンの下側に位置している２つの櫛歯状片２２の先端が押し上げられ、他の櫛歯状片２２を押し広げることによって半球形状の筆端部４が弾性変形する。その他の作用或いは挙動については図１２（ａ）、（ｂ）の場合と同じである。なお、図１２（ａ）、（ｂ）、あるいは図１３以外の筆記状態、すなわちペン軸を中心としてどのような回転角度位置をとっても、ペン先１の筆端部４が紙面に対して斜めに接した場合には、筆端部４が弾性変形によって微拡大し、前記の場合と同様な作用或いは挙動を行う。
【００１９】
図１４においても、図１２を参照して説明したのと同様の筆記動作時の変形が生じる。すなわち、図１４において、（ａ）はペン先１の先端において櫛歯状片２２の１つが真下にくるようにペンが紙面に向けられている状態の下で、ペン先１の筆端部４がまだ紙面に接していないか、或いは接していても圧力が加わっていないときの、当該筆端部４の状態を示す。この場合は、櫛歯状片２２のいずれにも撓み力が加わらないため、各櫛歯状片２２は互いに弾性的に接触している。次に、筆記者が文字等を書くために力を加えると、この筆記を行なうときの圧力により、筆端部４はペン先基本体２の基部２１に固定された櫛歯状片２２の先端として撓み、上側に移動する。この場合において、通常の筆記をするときの圧力では先端部は、図１２に関連して前述したのと同様、例えば０．１〜０．５ミリメートル（ｍｍ）の変位を生じる。このとき、半球状の筆端部４を正面からみると、この場合はペン先１の円錐形の部分が５枚の櫛歯状片２２で構成されているから、図１４（ｂ）に示すように、この筆端部４を構成している複数の櫛歯状片２２のうちペンの下側に位置する１つの櫛歯状片２２は先端が押し上げられ、両側位置にある他の櫛歯状片２２を左右に押し広げることによって半球形状が変形する。
【００２０】
図１５は、図１４（ａ）、（ｂ）の場合と異なり、ペン先１の先端において２つの櫛歯状片２２の境界に当たる部位のインキ導出部２３１の１つが真下にくるようにペンが紙面に向けられている状態の下で、ペン先１の筆端部４に圧力が加わったときの、筆端部４の変形状態を示す。この場合、半球状の筆端部４を正面からみると、筆記を行なうときの圧力により、筆端部４を構成している複数の櫛歯状片２２のうちペンの下側に位置している２つの櫛歯状片２２の先端が押し上げられ、この２つの櫛歯状片２２が協働して対向位置にある１つの櫛歯状片２２を押し上げるとともに、両側位置にある櫛歯状片２２を左右に押し広げることによって半球形状が変形する。その他の作用或いは挙動についてはすでに述べたのと同じである。なお、図１４においては、図１３中斜線で表わされたペン先が紙面に接触する領域Ａは示してないが、図１４の場合も図１３の場合と同様筆記に際しての接触領域が現れる。
【００２１】
このように第１の実施の形態によれば、ペン先１先端部にセラミックス材を使用しているので、ペン先１先端部の耐摩耗性が高く、ペン先１の耐久性を著しく高めることができるとともに、筆記時に滑らかな筆感と長時間に亘って均一の滑らかな筆跡を得ることができる。また筆記先端についたインキが乾いてかすが付着していても筆記動作を行えば、筆端部４の微動により、すなわち筆端部４の各半球分割部２３のずれ合い、弾性変形により、筆端部４の全部又は一部を微変形して筆圧に応じた先端幅を生ぜしめ、インキの乾涸膜を破り、インキを流出し易くするばかりでなく、筆端部４に紙面よりの微細なゴミが巻き込まれてもこのゴミをインキの流出と共に直ちに排出することができる。
【００２２】
また、ペン先基本体２を基部２１と５本乃至８本の櫛歯状片２２とにより構成し、基部２１と櫛歯状片２２との間の周囲に樹脂製のマウスピースや金属製のパイプからなる収束部材３を嵌め込むだけの簡単な組み立てにより、その収束部材３の平均した圧力によって５本乃至８本の櫛歯状片２２を歪むことのない円錐形に収束し、各櫛歯状片２２間に一定のインキ導出路２３１を構成するとともに、その先端に片ずれのない半球形の筆端部４を構成し、半球形状の筆端部４を軸心に対し斜めに紙面に押し当てたときに、各櫛歯状片２２先端の半球分割部２３が互いにずれ合って弾性変形し、先端半球部の外径を拡大する動作を行い、紙面に押し当てる動作を除いたときに先端部が弾性により元の半球形状に復するようにしているので、紙面に対してどの方向へも書記することができ、ペン軸を中心に回動してもどの位置からでもどの角度からでも書けるのに加え、筆圧を強弱加減することにより線の幅を太くあるいは細く変えることができ、毛筆のような線の幅が変化する種々の態様の文字を筆記することもできる。その際、筆圧の強弱に応じて櫛歯状片２２が撓んで筆圧を吸収し、このクッション性によりペンタッチの柔らかい感触を筆記者の手指に与え、長時間筆記をしても疲れにくいという利点もある。またこのクッション性は、筆圧の大きい場合のペン先端の変形、磨耗を軽減し、筆記部分の耐久性を一層向上することができる。
【００２３】
また、この実施の形態においては、ペン先基本体２の構造上、５本乃至８本の櫛歯状片２２の先端側を開口して各櫛歯状片２２の間を離しているため、先端半球部の表面をバフ、バレル、ブラスト等の方法により効率よく研磨することができ、滑りのよい筆端部４を容易に作ることができる。また、各櫛歯状片２２を収束部材３により平均した押圧力で円錐状に収束することから、片寄りのない円錐形ペン先を簡単に形成することができる。
【００２４】
（実施の形態２）
図１６は本発明の第２の実施の形態におけるペン先基本体６の構成を示している。この実施の形態では、基部６１と複数の櫛歯状片６２の後部片６２２が金属板を用いてプレス成形により一体に形成される。すなわち、第１の実施の形態と同様に、基部６１が円筒形に形成されるとともに、その一端側軸心の円周上に沿って等間隔に５本乃至８本の後部片６２２が相互の間にスリット状の溝６２４を設けて形成される。この場合、各後部片６２２はその基部６１側の一部を弾力部６５として先端側を内方に屈曲された片持ち梁構造をなす。また、各後部片６２２の先端側にセラミックス製の前部片２２１を結合するための係合溝６２３が設けられる。この係合溝６２３は後部片６２２の先端面から軸方向に全長の３分の１程度の長さに予め具備された両側片を断面空間が逆Ｔ字形になるように巻き込んで作られる。このようにして基部６１の外周上に金属製の円筒状の外筒６６を圧嵌されて全体の形状が固定される。
【００２５】
このような基部６１と櫛歯状片６２の成形品に、第１の実施の形態と同様に、セラミックス製の前部片２２１が結合される。この場合、各前部片２２１の係止突起２２６を各後部片６２２の係合溝６２３に前方から合わせ、押し込みながら挿入して係止突起２２６を係合溝６２３へ嵌合（係合）することにより、各前部片２２１が各後部片６２２の先端延長上に連続的に係合される。このようにして各前部片２２１と各後部片６２２が複合一体化され、このペン先基本体６は、第１の実施の形態と同様に、各後部片６２２上にマウスピース又は金属パイプ等の収束部材３が装着され、この収束部材３の段差構造により各後部片６２２が外側から軸心に向けて押圧され、各後部片６２２が略円柱形に、各前部片２２１が略円錐形状に、各半球分割部２３が略半球状に収束される。
【００２６】
このようにしても、第１の実施の形態と同様の作用効果を奏することができる。
【００２７】
なお、第１、第２の実施の形態において、ペン先１の円錐形部分を５〜８本の櫛歯状片２２、６２に代えて、例えば４本以下の櫛歯状片２２、６２で構成し、先端半球状の筆端部４の分割数を少なくした場合、インキ導出の溝２３１となる各櫛歯状片２２、６２の合わせ部分の各間隔が先端の外径に比して大きくなり、ペン先１を紙面に接した時に、その角度によって紙面と溝との間隔が広がる場合（ペン先の紙面との角度を直角にする程紙面とインキ導出溝との間隔は少なくなるが、間隔を４５°近くに寝かせた場合には紙面と前記溝との間隔は拡大する。）が生じ、インキを毛細管的に導出する部分が紙面から離れ、インキ出が円滑にならないことが考えられる。本件のペン先の狙いの一つとして、軸心上どの方向でも、また紙面との角度でもできるだけ限定することなく、幅広い筆記角度、例えば９０°から４５°などの範囲で円滑に自由な筆記感をもつことであるが、これを若干制限したペン先とすれば、円錐形の分割数を４本以下あるいは３本に設定しても、同様な構造を取り、先端半球部がずれ合い、筆圧の大小によって半球部が微拡大する限り、先端の耐久性大、タッチの良さ、抑揚のある筆跡、インキ書き出し良好等の効果を求めるには充分であり、本発明の範囲内のものと見ることができる。
【００２８】
【発明の効果】
以上説明したように、ペン先先端部にセラミックス材を使用するので、ペン先先端部の耐摩耗性が高く、ペン先の耐久性を高めることができるとともに、筆記時に滑らかな筆感と筆跡とを得ることができる。また、筆圧に応じて筆端部の各半球分割部がその後部片の弾性変形によりずれ合い、弾性的に変形することにより、ペン先先端部が硬質のセラミックス材でありながら、インキの乾きによるインキの粘度変化又はかす溜りに対応してインキ切れを防止できるとともに、ゴミ、紙くず等がインキ通路に付着した場合でもこれを確実に除去して筆記を安定させることができる。さらに、この筆端部の弾性変形により、紙面への接触感が柔らかく、紙面に対してどの角度でも書け、ペンの軸心を中心に回動してもどの位置でも書け、また筆圧を強くすれば太く、弱くすれば細く書くことができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態におけるセラミックス複合円錐形ペン先の斜視図
【図２】同ペン先のペン先基本体の斜視図
【図３】同ペン先のペン先基本体の分解斜視図
【図４】同ペン先のペン先基本体に備えた後部片の縦断面図
【図５】同ペン先のペン先基本体に備えた前部片単体の部分断面図
【図６】同ペン先のペン先基本体に備えた前部片単体の部分断面図
【図７】同ペン先のペン先基本体の分解斜視図
【図８】同ペン先に備えた収束部材の変更例を示す分解斜視図
【図９】同ペン先の先端筆端部の斜視図
【図１０】同ペン先の先端筆端部の断面図
【図１１】同ペン先の筆端部を紙面に押し当てた状態を示す部分斜視図
【図１２】同ペン先の筆端部の動作を示す先端面図
【図１３】同ペン先の筆端部の動作を示す先端面図
【図１４】同ペン先の異なる本数の櫛歯状片から構成された筆端部の動作を示す先端面図
【図１５】同ペン先の異なる本数の櫛歯状片から構成された筆端部の動作を示す先端面図
【図１６】本発明の第２の実施の形態におけるセラミックス複合円錐形ペン先（ペン先基本体）の斜視図
【符号の説明】
１ペン先
２ペン先基本体
２１基部
２１１大径部
２１２小径部
２１３段差部
２２櫛歯状片
２２１前部片
２２２後部片
２２３係合溝
２２４幅狭の溝
２２５幅広の溝
２２６係止突起
２２７幅狭の係止突状部
２２８幅広の係止突状部
２３半球分割部
２３１インキ導出路
２４スリット状の溝
３収束部材
４筆端部
５ペン軸体
５１胴部
５２インキ誘導芯
６ペン先基本体
６１基部
６２櫛歯状片
６２２後部片
６２３係合溝
６２４溝
６５弾力部
６６外筒[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ceramic composite cone pen tip using a ceramic material having excellent durability.
[0002]
[Prior art]
Conventionally, a fountain pen is known as a highly durable writing instrument at the tip of the nib. In the case of a fountain pen nib, a wear-resistant alloy is welded to the tip, and after cutting, the corners are polished and rounded. In addition, as a nib having high wear resistance following such a nib structure, a ceramic nib is drawing attention. As this type of nib, as disclosed in Japanese Utility Model Laid-Open No. 60-8085, Japanese Utility Model Laid-Open No. 60-109799, Japanese Utility Model Laid-Open No. 1-86578, Japanese Patent Application Laid-Open No. 1-146797, etc. There have been proposed ones in which a groove is formed in a plate of ceramic material and the tip thereof is rounded, or a rod-like pen body is provided with a through hole to reach the tip.
[0003]
[Problems to be solved by the invention]
However, since the ceramic material is hard in the conventional ceramic nib and cannot be bent like a metal plate-shaped molding pen, a groove or a through-hole is provided to draw out ink. However, such grooves and through-holes cannot cope with ink viscosity changes due to drying of ink or stagnation of ink, causing problems such as running out of ink, and fine contact due to contact between the brush tip and the paper surface. There is a problem that the writing must be unstable because there is almost no cleaning means when the ink passage of the pen body is blocked. These problems are a major cause that ceramic pen nibs cannot be put into practical use while using highly durable materials, and pens using ceramic nibs cannot be marketed as practical writing instruments.
The present invention solves such a conventional problem, using a ceramic material at the tip of the pen tip to increase the durability of the tip of the pen tip, and to obtain a smooth writing feel and handwriting at the time of writing In addition, while the tip of the pen tip is made of a hard ceramic material, it can prevent ink from running out in response to ink viscosity changes or ink accumulation due to ink drying, and even if dust, waste paper, etc. adhere to the ink path. The writing can be stabilized by removing the mark reliably, and the touch feeling to the paper surface is soft and can be written at any angle with respect to the paper surface. An object of the present invention is to provide an excellent ceramics composite conical nib that can be used.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the ceramic composite cone pen tip of the present invention is formed on the circumference of the cylindrical base and the one end side axial center, and gradually converges into a substantially conical shape toward the tip. A nib basic body having a plurality of possible comb-like pieces and a plurality of hemispherical divided parts that are formed at the tips of the comb-like pieces and can be converged as a substantially hemispherical top. A converging member that is formed in a cylindrical shape that can be fitted on the outer periphery and that can converge a plurality of comb-like pieces and the hemispherical divided parts, and each comb-like piece has a front side that includes the hemispherical divided parts. It consists of a piece and a rear piece on the rear side, the front piece is formed of a ceramic material, the rear piece is formed of a synthetic resin material or a metal material so as to be elastically deformable, and the nib basic body is formed by a converging member When converged, an ink lead-out path is formed between each comb-shaped piece, and its tip In which writing tip of the hemispherical is configured.
With this configuration, a ceramic material is used for the tip of the pen tip, so the tip end of the pen tip has high wear resistance, and the durability of the pen tip can be increased, and a smooth writing feel and handwriting can be obtained during writing. be able to. In addition, each hemispherical divided portion of the brush tip is displaced by elastic deformation of the rear piece according to the writing pressure, and elastically deforms, so that the tip of the pen tip is a hard ceramic material, but the ink is dried Ink can be prevented from running out in response to a change in ink viscosity or a stagnation of ink, and even when dust, waste paper or the like adheres to the ink passage, it can be reliably removed to stabilize writing. Furthermore, due to the elastic deformation of the brush tip, the feel of contact with the paper surface is soft and can be written at any angle with respect to the paper surface, and can be written at any position even if it rotates around the pen axis, and the writing pressure can be increased. If you make it weaker, you can write thinner.
The present invention is also embodied as follows.
First, the number of comb-like pieces of the nib basic body is set to 5 to 8.
Second, the base is integrally formed of a synthetic resin material or a metal material together with the rear piece of each comb-like piece.
Thirdly, a locking projection is provided on one of the coupling surfaces of the front piece and the rear piece, and an engaging recess is provided on the other side, and the front piece is engaged by engagement of the locking projection and the engaging recess. And the rear piece.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Embodiment 1)
FIG. 1 shows an overall configuration of a ceramic composite cone pen tip (hereinafter simply referred to as a pen tip) according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a pen tip, which includes a pen tip basic body 2 and a converging member 3.
[0006]
As shown in FIG. 2, the nib basic body 2 is formed at regular intervals along the circumference of a base portion 21 formed in a cylindrical shape and one end side axial center, and gradually moves toward the distal end as a whole. A plurality of comb-like pieces 22 that can be converged into a substantially conical shape, and a plurality of hemispherical division parts 23 that are formed at the tips of the comb-like pieces 22 and can be converged as a hemispherical apex as a whole. Here, the nib basic body 2 is provided with five to eight comb-like pieces 22. These comb-like pieces 22 are constituted by a front-side front piece 221 including a hemispherical dividing portion 23 and a rear-side rear piece 222. The front piece 221 and the rear piece 222 have substantially the same length.
[0007]
As shown in FIG. 3, the base 21 is integrally formed with the rear piece 222 of each comb-like piece 22 by injection molding using a synthetic resin material having elasticity. The base portion 21 is composed of a large diameter portion 211 and a small diameter portion 212 on the outer shape, and has a step portion 213 at the boundary between them. The rear piece 222 of each comb-like piece 22 is continuous in a circular arc cross section at equal intervals along the outer periphery of the one end surface of the base portion 21 on the large diameter portion 211 side, and linearly protrudes substantially parallel to the axial direction. A slit-like groove 24 is provided between each rear piece 222. In this way, as shown in FIG. 4, each rear piece 222 is divided and formed into a substantially cylindrical shape in cross section, and is continued to the base 21 while maintaining a constant curved shape. With this configuration, each rear piece 222 has the same structure as a cantilever plate having a fixed end at the boundary with the base 21, in other words, a cantilever beam fixed at one end. Accordingly, the integrally formed product of the base 21 and the five to eight rear pieces 222 is normally in a state where the rear pieces 222 are open, and the rear pieces 222 are pressed from the outer peripheral direction toward the axis. As a result, it is constricted inward, and the whole is converged while maintaining a substantially cylindrical shape. Further, as shown in FIG. 3, an engagement groove 223 for coupling the front piece 221 is provided on the distal end side of each rear piece 222. The engagement groove 223 has a length of about one third of the entire length in the axial direction from the front end surface of the rear piece 222. Refusal Reverse T-shape In shape As shown in FIG. 4, it has a narrow groove 224 on the outer peripheral surface side and a wide groove 225 on the back side.
[0008]
As shown in FIG. 3, the front piece 221 of each comb-like piece 22 is formed of a ceramic material together with the hemispherical division 23 at the tip. In this case, a ceramic material (powder of zirconia, alumina, silicon nitride, silicon carbide, etc.) is pressure-molded by a molding process such as compression molding or injection molding in a mold to form an overall shape, which is 1300 ° C to 1500 ° C. It is fired and solidified at a high temperature of ° C. Each front piece 221 is formed in a circular arc shape as shown in FIG. 5 so as to be continuous with each rear piece 222, and as shown in FIG. 3, the whole is gradually tapered toward the tip. And gradually inclined toward the tip toward the axis. Further, the hemispherical dividing portion 23 at the tip has a hemispherical divided shape of 1/5 to 1/8 according to the number of comb-like pieces 22. The outer corners of each hemispherical division 23, that is, the corners formed between the outer surface of the hemispherical division 23 and the side surfaces thereof, are polished by blasting, barrel polishing, buffing, etc. A roundness (R surface) is attached so that the corner does not get caught when touching. The rounding of the outer corner of the hemispherical dividing portion 23 may be performed by barrel polishing or the like in advance before the front piece 221 is joined to the rear piece 222, or after the front piece 221 is joined to the rear piece 222. Also good.
[0009]
Further, a locking projection 226 that can be engaged with the engaging groove 223 of each rear piece 222 is provided on the rear end side of each front piece 221. This locking projection 226 corresponds to the engaging groove 223 of the rear piece 222. Break Reverse T-shape In shape As shown in FIG. 6, a narrow locking projection 227 and a wide locking projection 228 that can be fitted in the groove 224 on the outer peripheral surface side of the rear piece 222 and the groove 225 on the back side. And have. As shown in FIG. 7, the locking protrusions 226 of the front pieces 221 are aligned with the engaging grooves 223 of the rear pieces 222 from the front, inserted while being pushed in, and the locking protrusions 226 are fitted into the locking grooves 223 ( By engaging the front piece 221, the front piece 221 is continuously coupled to the front end extension of the rear piece 222. This joining work is mainly performed by a combination machine, but manual work is also possible.
[0010]
In this way, each of the five to eight comb-like pieces 22 is formed by combining the synthetic resin rear piece 222 and the ceramic front piece 221 in a composite manner, and a certain gap between the comb-like pieces 22. As a normal state, the interdigital combs 22 are open. The entire front piece 221 made of ceramic is hard and does not bend. However, the front piece 221 is combined and integrated with the rear piece 222 made of synthetic resin having elasticity, so that the shaft of the comb-like piece 22 can be obtained. The movement following the bending or bending of the rear piece 222 is made possible on the front piece 22 by pressing or pulling in the center direction.
[0011]
In the nib basic body 2, the plurality of comb-like pieces 22 have a constant gap. (Slit groove 24) Are arranged on the circumference, and each comb-tooth shaped piece 22 is not converged to a shape close to a conical shape and the front end side is relatively opened, so When the pieces 221 are combined and integrated, they can be coupled at a sufficient interval, facilitating the operation. Further, when the nib basic body 2 is manufactured, the mold can be easily manufactured. 2 Since the interval between the rear pieces 222 is maintained by the groove 24, sufficient dimensions such as the thickness and width of the fin-shaped projections of the cavity are taken in the injection molding and the manufacture of the mold. The dimensions to withstand the strength are secured. Further, since the tip of the front piece 221 is the brush tip 4, it is necessary to take a corner from the tip of the front piece 221, so that the space between the hemispherical divisions 23 at the tip of each comb-like piece 22 is open. Utilizing this, it is possible to easily blast the outer surface corners of the respective hemispherical divided portions 23 and perform barrel polishing, buffing, and the like, and to smoothly form the top portions. Thereby, the corner | angular part of each hemispherical division | segmentation part 23 converged in a hemisphere is eliminated, and when the top part contacts a paper surface as a pen point, a catch is prevented and smoothness is improved.
[0012]
On the other hand, as shown in FIG. 1, the converging member 3 is formed as a mouthpiece for mounting the pen tip 1 on the body 51 of the pen shaft body 5. The converging member 3, that is, the mouthpiece 3, is integrally formed of synthetic resin, and has a fixed portion corresponding to the base portion 21 of the nib base body 2 and each comb-like piece 22 of the nib base body 2 on the inner periphery thereof. The rear piece 222 is pressurized so that each rear piece 222 has a substantially cylindrical shape, each front piece 221 has a substantially conical shape, and each hemispherical divided portion 23 has a substantially hemispherical inner diameter (that is, normal comb teeth). And a throttle part having a dimension smaller than the outer diameter of the outer periphery of the rear piece 222 of the shape piece 22. Moreover, you may form this convergence member 3 with a metal pipe, as shown in FIG. In this case, the converging member 3 is formed in a cylindrical shape that can be fitted to the intermediate portion of the nib base body 2, and each comb-like piece 22 is pressed in the axial direction on the inner periphery thereof, and the diameter gradually decreases in the tip direction. A step structure that can converge into a conical shape.
[0013]
The nib 1 includes such a nib basic body 2 and a converging member 3 as components, and the converging member 3 is passed from the tip of the nib basic body 2 as shown in FIG. 1 or FIG. The base member 2 is fitted around and is slid and assembled until the converging member 3 comes into contact with the base step portion 213 of the nib base body 2. In this way, the converging member 3 is fixed on the rear piece 222 of the five to eight comb-like pieces 22 of the nib basic body 2, and a plurality of comb-like pieces 22 are formed by the front inner periphery of the converging member 3. Each rear piece 222 is pressed from the outside toward the axis and converged by the average pressure. That is, each comb-like piece 22 is pressed and converged inward as it goes to the tip, and each rear piece 222 corresponding to the rear end from the substantially center of each comb-like piece 22 is converged into a substantially cylindrical shape without distortion. At the same time, each front piece 221 corresponding to the tip from the approximate center of each comb-like piece 22 is converged into a substantially conical shape without distortion that gradually decreases in diameter. In this way, the comb-like pieces 22 adjacent to each other elastically contact each other, and as shown in FIG. 9 and FIG. A space between the pieces 22 is narrowed toward the tip to form a capillary gap, and an ink outlet path 231 is formed. Further, adjacent hemispherical divided portions 23 at the tip end are brought into contact with each other without gaps, and a smooth hemispherical brush tip portion 4 having no irregularities is formed there. The brush tip 4 has a comb-like piece 22 with a plurality of tips arranged in a circular shape and a petal shape in cross section. The outer periphery of the brush tip 4 is pressed against the paper surface during writing to be used for writing characters. Become. As shown in FIG. 11, the ink guide core 52 is inserted and disposed in the hollow of the nib basic body 2 so as to contact the inner surface up to the tip. Ink is supplied through the ink guide core 52 and reaches the inner surface of the nib basic body 2, which passes from the inner surface to the outer surface, that is, the top surface of the tip hemisphere, through the capillary gap, that is, the ink outlet path 231. Communicated. When the hemispherical brush tip 4 is in contact with the paper surface, the ink moves to the paper surface and writing is possible. In order to make it easier to guide ink to the outer surface of the tip than the ink guide core 52 provided on the inner surface of the tip of the nib 1, it is necessary to positively create a gap in the abutting portion (between adjacent abutting surfaces). Therefore, it is preferable that the cross-sectional shape of the abutting portion is configured such that the inner surface ends are adjacent to each other and the outer surface ends are adjacent to each other.
[0014]
Next, the writing operation by the writing tool using the nib 1 will be described with reference to FIGS. FIG. 11 shows a state where the brush tip 4 of the nib 1 is in contact with the paper surface. 12 (a), 12 (b), and 13 show that the nib basic body 2 includes six comb-like pieces 22 and the hemispherical brush tip 4 at the tip is composed of six hemispherical divisions 23. 14 (a), 14 (b), and 15 show that the nib basic body 2 is provided with five comb-like pieces 22 and the tip of the hemispherical brush tip 4 is shown in FIG. An example of operation in the case where the hemispherical division unit 23 is used is shown. In the nib 1, each comb-like piece 22 is a divided piece constituting a conical shape, and each tip has an independent shape. That is, one piece of the plurality of comb-like pieces 22 has one molded shape in which a hemispherical shape is equally divided into a plurality of tips at the tip, and is in the middle of being connected to the cylindrical base 21 as a comb tooth. The cross-sectional shape is divided into a conical shape, has a curved shape, continues to the base portion 21, and has the same configuration as a cantilever plate having a boundary portion with the base portion 21 as a fixed end, in other words, a cantilever beam fixed at one end. It has become. In other words, the hemispherical brush tip 4 at the tip is assembled by a plurality of hemispherical divisions 23, which are displaced at the contact surfaces of the adjacent hemispherical divisions 23 and can be deformed. Therefore, when writing with a writing instrument or the like, if a pushing force (bending force) is applied to the tip of the comb-like piece 22 due to the writing pressure applied to the nib 1, the comb-like piece 22 is fixed by the converging member 3. As a result, the hemispherical dividing part 23 is displaced and the outer diameter of the brush tip part 4 is enlarged. This deviation varies depending on the writing pressure. Further, when this push-up force (writing pressure) is lost, the comb-like piece 22 returns to its original shape, and the hemispherical division part 23 is returned to its original shape. The nib 1 has a front piece 221 of a comb-like piece 22 made of a hard ceramic material and has no elasticity. However, a rear piece 222 that fixes the front piece 221 has an elasticity. Since it is formed of a synthetic resin material having a characteristic, it can be bent and bent as the comb-like piece 22. This elasticity softens the contact of the nib 1 with the paper surface during writing, and gives a soft touch to the hand holding the writing instrument while using a hard material such as ceramics.
[0015]
In order to perform writing with this writing instrument, as shown in FIG. 11, when the pen tip 1 is applied to the paper in a practical range of about 45 ° to 60 °, the contact surface side with the paper surface (with the pressure of this writing) The ink that reaches the joint gap of the brush tip part 4 of the nib 1 corresponding to, that is, the inside of the tip part of the ink outlet part 231 is sucked out by the capillary phenomenon generated on the contact surface of the paper surface and the brush tip part 4, You can write a line. The elastic deformation action of the hemispherical brush tip 4 by the writing pressure at this time is shown in FIGS.
[0016]
FIGS. 12 and 13 show changes in the shape of the writing tip portion 4 of the nib 1 whose cone-shaped portion is composed of six comb-shaped pieces 22, and FIGS. 14 and 15 show the conical shape. This represents a change in the shape of the writing end portion 4 of the nib 1 composed of five comb-shaped pieces 22 with a writing operation. In FIG. 12, (a) shows a state in which the brush tip 4 of the nib 1 is still on the paper surface in a state where the pen is directed to the paper surface so that one of the comb-like pieces 22 is directly below the tip of the nib 1. The state of the brush tip 4 when not touching or lightly touching and no pressure is applied is shown. In this case, since no bending force is applied to any of the comb-like pieces 22, the comb-like pieces 22 are in elastic contact with each other. Next, when the writer applies force to write a character or the like, the writing tip 4 is a fulcrum at the part fixed to the mouthpiece 3 on the base 21 of the nib basic body 2 by the pressure at the time of writing. The tip of the comb-like piece 22 bends and moves upward, but resistance is generated due to the rigidity of the material of the comb-like piece 22, and the tip moves with a predetermined dimension under normal writing pressure. That is, it stops at displacement. This displacement is, for example, 0.1 to 0.5 millimeter (mm). At this time, when the hemispherical brush tip 4 is viewed from the front, as shown in FIG. 12B, the plurality of comb-like pieces 22 constituting the brush tip 4 are located below the pen. The tip of one comb-like piece 22 is pushed up, the comb-like piece 22 in the opposite position (upper side) is pushed up, and the comb-like piece 22 on both sides (left and right) is pushed to the left and right to expand in a hemispherical shape Is deformed and the brush tip 4 is displaced as a whole.
[0017]
As a result, as a whole, the outer diameter of the hemispherical portion and the area in contact with the paper surface are increased. In FIG. 12B, the region A in which the pen tip indicated by the oblique line is in contact with the paper surface is shown in FIG. The region A is enlarged than the region A indicated by the oblique lines. The degree of enlargement increases as the pressure for pressing the nib 1 against the paper surface, that is, the writing pressure increases. Since the outer diameter of the hemispherical brush end portion 4 is increased by the amount of the lateral displacement of the hemispherical dividing portion 23, the range of ink that is transmitted to the contact surface by capillary action increases, and as a result, the width of the handwriting is increased. growing. Conversely, if the writing pressure is reduced, the handwriting width is reduced. In other words, the thickness of the line when writing depends on the outer diameter of the brush tip 4 and expands according to the extent to which the hemispherical shape expands. Therefore, the width of the line is thick or thin depending on the size of the writing pressure. Written as a thing. If the writing pressure is changed in various ways, it is possible to write characters of various modes in which the line width changes like a brush. Furthermore, as shown in FIG. 12B and FIG. 13, when the paper surface is in contact with the tip hemisphere at an angle around the central axis so that the portion hitting the paper is different, the tip hemisphere The portion is slightly enlarged, and the same effect as described above is obtained. In addition, the entire comb-like piece 22 bends according to the strength of the writing pressure, and even if the writing pressure is high, the entire comb-like piece 22 absorbs the force to produce a cushioning action.
[0018]
FIG. 13 is different from FIGS. 12 (a) and 12 (b) in that the pen is placed so that one of the ink outlets 231 at the tip of the pen tip 1 hits the boundary between the two comb-like pieces 22. The deformation state of the brush tip portion 4 when pressure is applied to the brush tip portion 4 of the nib 1 under the state of being directed to the paper surface is shown. In this case, when the hemispherical brush tip 4 is viewed from the front, it is located below the pen among the plurality of comb-like pieces 22 constituting the brush tip 4 due to the pressure when writing. The tips of the two comb-like pieces 22 are pushed up, and the other comb-like pieces 22 are pushed and spread, whereby the hemispherical brush tip 4 is elastically deformed. Other actions or behaviors are the same as those in FIGS. 12 (a) and 12 (b). Note that, in any writing state other than FIGS. 12A, 12B, or 13, that is, in any rotation angle position around the pen axis, the brush tip 4 of the pen tip 1 is in contact with the paper surface obliquely. In this case, the brush tip 4 is slightly enlarged by elastic deformation and performs the same action or behavior as in the above case.
[0019]
Also in FIG. 14, the deformation during the writing operation similar to that described with reference to FIG. 12 occurs. That is, in FIG. 14, (a) shows a state in which the brush tip 4 of the nib 1 is in a state where the pen is directed to the paper surface so that one of the comb-like pieces 22 is directly below the tip of the nib 1. It shows the state of the brush tip 4 when it is not in contact with the paper surface yet or when no pressure is applied even though it is in contact. In this case, since no bending force is applied to any of the comb-like pieces 22, the comb-like pieces 22 are in elastic contact with each other. Next, when the writer applies force to write a character or the like, the writing tip 4 is used as the tip of the comb-like piece 22 fixed to the base 21 of the nib basic body 2 by the pressure when writing. Bends and moves upward. In this case, the tip portion is displaced by, for example, 0.1 to 0.5 millimeters (mm) as described above with reference to FIG. At this time, when the hemispherical brush tip 4 is viewed from the front, in this case, the conical portion of the nib 1 is composed of five comb-like pieces 22, and as shown in FIG. In addition, among the plurality of comb-like pieces 22 constituting the brush end portion 4, one comb-like piece 22 located on the lower side of the pen is pushed up at the tip, and the other comb-like pieces located on both sides are provided. The hemispherical shape is deformed by expanding 22 to the left and right.
[0020]
FIG. 15 is different from FIGS. 14 (a) and 14 (b) in that the pen is positioned so that one of the ink lead-out portions 231 at the tip of the pen tip 1 hits the boundary between the two comb-like pieces 22. The deformation state of the brush tip portion 4 when pressure is applied to the brush tip portion 4 of the nib 1 under the state of being directed to the paper surface is shown. In this case, when the hemispherical brush tip 4 is viewed from the front, 2 of the plurality of comb-like pieces 22 constituting the brush tip 4 is located below the pen due to the pressure when writing. The tips of the two comb-like pieces 22 are pushed up, the two comb-like pieces 22 cooperate to push up one comb-like piece 22 at the opposite position, and the comb-like pieces 22 at the both side positions are pushed up. The hemispherical shape is deformed by pushing it left and right. Other actions or behaviors are the same as already described. In FIG. 14, the region A where the pen tip represented by the oblique line in FIG. 13 contacts the paper surface is not shown, but the contact region in writing also appears in FIG. 14 as in FIG. 13.
[0021]
As described above, according to the first embodiment, since the ceramic material is used for the tip of the nib 1, the wear resistance of the tip of the nib 1 is high, and the durability of the nib 1 is remarkably increased. And a smooth writing feeling during writing and a uniform smooth handwriting over a long period of time. Further, if the writing operation is performed even if the ink attached to the writing tip is dried and debris is adhered, the writing tip 4 is moved by the fine movement of the writing tip 4, that is, the displacement of each hemispherical dividing portion 23 of the writing tip 4 and the elastic deformation. All or part of it is slightly deformed to produce a tip width according to the writing pressure, breaking the ink dry film and facilitating the outflow of the ink. However, this waste can be discharged immediately with the outflow of ink.
[0022]
The nib basic body 2 is composed of a base 21 and five to eight comb-shaped pieces 22, and a resin mouthpiece or metal is formed around the base 21 and the comb-shaped pieces 22. By simply assembling the converging member 3 made of a pipe, the five to eight comb-shaped pieces 22 are converged into a conical shape without distortion by the average pressure of the converging member 3, and each comb tooth A fixed ink lead-out path 231 is formed between the strips 22, a semispherical brush tip 4 is formed at the tip thereof, and the hemispherical brush tip 4 is pressed against the paper surface obliquely with respect to the axis. The hemispherical divisions 23 at the tips of the comb-like pieces 22 are displaced from each other and elastically deformed to expand the outer diameter of the tip hemisphere, and the tip is removed when the operation of pressing against the paper surface is removed. Is restored to its original hemispherical shape due to its elasticity. In addition to being able to write in any direction, it can be written from any angle from any position even if it rotates around the pen axis, and the line width is made thicker or thinner by increasing or decreasing the writing pressure It is possible to change, and it is possible to write various forms of characters in which the line width changes like a brush. At that time, the comb-like piece 22 bends and absorbs the writing pressure according to the strength of the writing pressure, and this cushioning gives a soft touch of the pen touch to the writer's finger and is said to be less fatigued even if writing for a long time. There are also advantages. Further, this cushioning property can reduce the deformation and wear of the pen tip when the writing pressure is large, and can further improve the durability of the writing portion.
[0023]
In this embodiment, because of the structure of the nib basic body 2, the front end sides of the five to eight comb-like pieces 22 are opened to separate the comb-like pieces 22 from each other. The surface of the tip hemisphere can be efficiently polished by a method such as buffing, barreling, blasting, etc., and the brush tip 4 having good slip can be easily made. In addition, since each comb-like piece 22 is converged in a conical shape with a pressing force averaged by the converging member 3, a conical pen tip having no deviation can be easily formed.
[0024]
(Embodiment 2)
FIG. 16 shows the configuration of the nib base body 6 in the second embodiment of the present invention. In this embodiment, the base 61 and the rear piece 622 of the plurality of comb-like pieces 62 are integrally formed by press molding using a metal plate. That is, as in the first embodiment, the base 61 is formed in a cylindrical shape, and five to eight rear pieces 622 are arranged at equal intervals along the circumference of the one end side axis. A slit-shaped groove 624 is provided therebetween. In this case, each of the rear pieces 622 has a cantilever structure in which a part on the base 61 side is bent as an elastic part 65 and the tip side is bent inward. In addition, an engagement groove 623 for connecting the ceramic front piece 221 is provided on the front end side of each rear piece 622. The engaging groove 623 is provided in advance on both side pieces with a length of about one third of the total length in the axial direction from the front end surface of the rear piece 622. Refuse So that the surface space is inverted T-shaped Winding Made in-depth. In this way, a metal cylindrical outer cylinder 66 is press-fitted onto the outer periphery of the base 61 to fix the entire shape.
[0025]
Similarly to the first embodiment, a ceramic front piece 221 is joined to the molded product of the base 61 and the comb-like piece 62. In this case, the locking protrusion 226 of each front piece 221 is aligned with the engaging groove 623 of each rear piece 622 from the front, inserted while being pushed in, and the locking protrusion 226 is fitted (engaged) into the engaging groove 623. Thus, each front piece 221 is continuously engaged on the distal end extension of each rear piece 622. In this way, each front piece 221 and each rear piece 622 are combined and integrated, and this pen nib basic body 6 has a mouthpiece or a metal pipe or the like on each rear piece 622 as in the first embodiment. The converging member 3 is mounted, and the rear piece 622 is pressed from the outside toward the axial center by the step structure of the converging member 3, each rear piece 622 is substantially cylindrical, and each front piece 221 is substantially conical. Further, each hemispherical dividing section 23 is converged into a substantially hemispherical shape.
[0026]
Even if it does in this way, there can exist an effect similar to 1st Embodiment.
[0027]
In the first and second embodiments, the conical portion of the nib 1 is replaced with 5 to 8 comb-like pieces 22 and 62, for example, with four or less comb-like pieces 22 and 62. When the number of divisions of the tip hemispherical brush tip 4 is reduced, the intervals between the mating portions of the comb-like pieces 22 and 62 that become the ink derivation grooves 231 are larger than the outer diameter of the tip. When the pen tip 1 comes into contact with the paper surface, the gap between the paper surface and the groove increases depending on the angle (the interval between the paper surface and the ink outlet groove decreases as the angle between the pen tip and the paper surface becomes perpendicular, , The gap between the paper surface and the groove is increased), and the portion where the ink is drawn capillaryly is separated from the paper surface, so that it is considered that the ink is not discharged smoothly. One of the aims of the pen tip in this case is to freely and smoothly write in a wide range of writing angles, for example, 90 ° to 45 °, without limiting as much as possible in any direction on the axis or angle with the paper surface. However, if this is a slightly restricted pen tip, the number of conical divisions should be 4 or more. Under Rui In three Even if set, as long as it takes the same structure, the tip hemisphere part shifts, and the hemisphere part slightly expands due to the size of the writing pressure, the tip endurance is great, the touch is good, the handwriting with inflection, ink writing, etc. It is sufficient to obtain the effect of the above, and can be regarded as being within the scope of the present invention.
[0028]
【The invention's effect】
As explained above, because the tip of the tip of the pen is made of ceramics, the tip of the tip of the nib has high wear resistance and can improve the durability of the nib. Can be obtained. In addition, each hemispherical divided portion of the brush tip is displaced by elastic deformation of the rear piece according to the writing pressure, and elastically deforms, so that the tip of the pen tip is a hard ceramic material, but the ink is dried Ink can be prevented from running out in response to a change in ink viscosity or a stagnation of ink, and even when dust, waste paper or the like adheres to the ink passage, it can be reliably removed to stabilize writing. Furthermore, due to the elastic deformation of the brush tip, the feel of contact with the paper surface is soft and can be written at any angle with respect to the paper surface, and can be written at any position even if it rotates around the pen axis, and the writing pressure can be increased. If you make it weaker, you can write thinner.
[Brief description of the drawings]
FIG. 1 is a perspective view of a ceramic composite conical nib according to a first embodiment of the present invention.
FIG. 2 is a perspective view of a nib base body of the nib.
FIG. 3 is an exploded perspective view of a nib base body of the nib.
FIG. 4 is a longitudinal sectional view of a rear piece provided in the nib base body of the nib.
FIG. 5 is a partial cross-sectional view of a single front piece provided in the nib base body of the nib.
FIG. 6 is a partial cross-sectional view of a single front piece provided on the nib base body of the nib.
FIG. 7 is an exploded perspective view of a nib base body of the nib.
FIG. 8 is an exploded perspective view showing a modified example of the converging member provided in the pen tip.
FIG. 9 is a perspective view of the tip end of the pen tip.
FIG. 10 is a cross-sectional view of the tip end of the pen tip.
FIG. 11 is a partial perspective view showing a state in which the brush tip portion of the nib is pressed against the paper surface.
FIG. 12 is a front end view showing the operation of the brush tip of the nib.
FIG. 13 is a front end view showing the operation of the brush tip of the nib.
FIG. 14 is a front end view showing the operation of the brush tip portion composed of different numbers of comb-teeth pieces of the same nib.
FIG. 15 is a front end view showing the operation of the brush tip portion composed of different numbers of comb-like pieces of the same nib.
FIG. 16 is a perspective view of a ceramic composite cone pen tip (pen nib basic body) according to a second embodiment of the present invention.
[Explanation of symbols]
1 nib
2 Nib basic body
21 Base
211 Large diameter part
212 Small diameter part
213 Stepped part
22 Comb teeth
221 front piece
222 Rear piece
223 engaging groove
224 narrow groove
225 Wide groove
226 Locking projection
227 Narrow locking projection
228 Wide locking projection
23 Hemisphere division
231 Ink outlet path
24 Slit-like groove
3 Convergence members
4 Brush tip
5 Pen shaft
51 trunk
52 Ink guide core
6 Nib basic body
61 Base
62 Comb teeth
622 rear piece
623 engaging groove
624 groove
65 elasticity
66 outer cylinder

Claims

A plurality of comb-like pieces formed on the circumference of the cylindrical base portion and its one end side axial center and gradually converging in a substantially conical shape toward the tip direction, and formed at the tips of these comb-like pieces. A nib base body having a plurality of hemispherical divisions that can converge with the entire hemispherical top as a whole,
It is formed in a cylindrical shape that can be fitted on the outer periphery of the nib basic body, and includes a converging member that can converge a plurality of comb-like pieces and their hemispherical division parts,
Each comb-like piece consists of a front piece on the tip side including a hemispherical division and a rear piece on the rear side,
The front piece is made of ceramic material,
The rear piece is formed of a synthetic resin material or a metal material so as to be elastically deformable,
The nib basic body is converged by the converging member, an ink lead-out path is configured between each comb-shaped piece, and a hemispherical brush tip is configured at the tip thereof .
A ceramic composite cone-shaped nib that is enlarged by being displaced by deformation when the brush tip hits the paper surface .

The ceramic composite cone-shaped nib according to claim 1, wherein the number of comb-like pieces of the nib basic body is set to 5 to 8.

The ceramic composite cone-shaped nib according to claim 1 or 2, wherein the base is integrally formed of a synthetic resin material or a metal material together with a rear piece of each comb-like piece.

A locking projection is provided on one of the coupling surfaces of the front piece and the rear piece, and an engagement recess is provided on the other side. The ceramic composite cone-shaped nib according to any one of claims 1 to 3.