JP2004025713A

JP2004025713A - Writing implement

Info

Publication number: JP2004025713A
Application number: JP2002187747A
Authority: JP
Inventors: Takashi Umeno; 梅野　高; Nobuyuki Nakajima; 中島　伸之
Original assignee: Mitsubishi Pencil Co Ltd
Current assignee: Mitsubishi Pencil Co Ltd
Priority date: 2002-06-27
Filing date: 2002-06-27
Publication date: 2004-01-29

Abstract

【課題】機密性に厳しい要求がなく、生産コストも低い筆記描線切れや塗付切れ等が発生しないボールペンタイプの筆記具を提供すること。
【解決手段】筆記液が充填されている収納管の先端に筆記部が装着されてなる筆記具において、収納管の筆記液後端面と接触したまま収納管内を摺動する押板が収納管の後端側に配置された加圧スプリングの先端部と接触し、少なくとも筆記時には加圧スプリングが圧縮作用を受けていてそのバネ復元圧で押板を介して筆記液を加圧する構成としたことを特徴とする筆記具。
特に筆記時は、収納管の加圧スプリングの後端部をノック式、回転ねじ込み式、又はスライド式などの押圧手段にて前進させることで加圧スプリングを所定の位置まで圧縮し、該位置にて係止状態に保持させることを特徴とする筆記具。
【選択図】　　　図２An object of the present invention is to provide a ballpoint pen-type writing instrument that does not require strict confidentiality and has a low production cost.
In a writing instrument having a writing portion attached to the tip of a storage tube filled with a writing liquid, a push plate that slides in the storage tube while being in contact with a rear end surface of the writing liquid in the storage tube is provided behind the storage tube. It comes into contact with the tip of the pressure spring arranged on the end side, and at least at the time of writing, the pressure spring is under compression and the writing liquid is pressed through the pressing plate with the spring restoring pressure. Writing implement.
In particular, at the time of writing, the pressure spring is compressed to a predetermined position by advancing the rear end of the pressure spring of the storage tube by a pressing means such as a knock type, a rotary screw type, or a slide type. A writing implement characterized by being held in a locked state.
[Selection] Fig. 2

Description

【０００１】
【発明の属する技術分野】
本発明は筆記用や化粧用等の筆記具に関し、特に筆記描線切れや塗付切れ等が発生しない筆記具に関するものである。
【０００２】
【従来の技術】
一般に、インクが充填されている収納管の先端部にボールとそれを保持しているチップホルダーからなる筆記部が装着されてなるボールペンタイプの筆記具は従来から知られており、この形状に類似して化粧料を入れた塗付具も従来から実開昭５５−１７７３１５号等で提案されていた。しかし、化粧品においては通常のボールペンに比べ使用時に上向き筆記の可能性が高く、通常のボールペンの弱点である筆記描線切れが発生しやすい。この対策として以前からインク後端からインク（又は化粧料）を加圧し筆記時にインク（又は化粧料）を筆記部分のボールに向けて力を加えることにより上向き筆記を行なってもインクが筆記面に出てボールとチップの間に隙間が出来ても、加圧されたインクに満たされインク切れは発生しない。その手段として気体の圧縮力を利用した加圧ボールペンが提案され、上向き筆記対策のみならず、通常の使用時にも描線が安定するという利点があった。
【０００３】
【発明が解決しようとする課題】
しかしその加圧を利用するため圧縮気体を軸に密封するタイプがあったが常時筆記部に加圧力が加わっているために、筆記部のボールとチップの完璧な密着力やシール性が要求され、チップ部材の寸法精度が必要で、その密閉性が悪いとその加圧力で筆記部からインク洩れが発生した。また軸の部分でも高い機密性を得るために部品の精度や生産工程にカシメ等が必要になり、品質維持や生産に支障がありコストがかかった。また使用時にインキ収容管の後端にポンピング式の加圧機構部が設けられてノック作動によって加圧機構部を前進作動させてインキ収容管の後端孔に空気を押し込み液を加圧するタイプも提案（特開２００１−１７１２８７号）されているが、機密性に厳しい要求があるため生産コストが高い。本発明の課題は、かかる実情に鑑み、機密性に厳しい要求がなく、生産コストも低い筆記描線切れや塗付切れ等が発生しない筆記具を提供しようとするものである。
【０００４】
【課題を解決するための手段】
本発明者等は、かかる課題を解決するために種々検討の結果、機密性に難のある気体の圧縮力を使用せずスプリングの圧縮によるばね圧を利用し、特に保管時等の筆記時以外には、インクへのばね圧を減圧又は加わらない方式について検討した。その結果、筆記液の後端面に接触する押板を収納管内に摺動可能に設け、筆記時にその押板をスプリングの圧縮によるバネ復元圧で押し、筆記時以外にはスプリングの圧縮を減少または開放する方式の本発明を完成した。
【０００５】
すなわち、本発明の請求項１に記載の筆記具は、筆記液が充填されている収納管の先端に筆記部が装着されてなる筆記具において、収納管の筆記液後端面と接触したまま収納管内を摺動する押板が収納管の後端側に配置された加圧スプリングの先端部と接触し、少なくとも筆記時には加圧スプリングが圧縮作用を受けていてそのバネ復元圧で押板を介して筆記液を加圧する構成としたことを特徴とする。
【０００６】
請求項２に記載の発明は、上記の請求項１に記載の筆記具において、保管時には加圧スプリングはほぼ自由長又は減圧縮されるように設定され、筆記時には加圧スプリングの後端部が外部からの押圧手段による圧縮作用を受けると共にそのスプリングの圧縮される寸法は、筆記液が消費されたときに押板が前進する量と同じか又はそれ以上になるように設定されることを特徴とする。
【０００７】
請求項３に記載の発明は、上記の請求項１又は２に記載の筆記具の好ましい実施態様であって、筆記時には収納管の加圧スプリングの後端部をノック式、回転ねじ込み式、又はスライド式などの外部押圧手段にて前進させることで加圧スプリングを所定の位置まで圧縮し、該位置にて係止状態に保持させることを特徴とする。
【０００８】
請求項４に記載の発明は、上記の請求項１〜３のいずれかに記載の筆記具の好ましい実施態様であって、保管時には先端筆記部の保護のための内部に突起部を設けたキャップを先端筆記部に嵌合し、筆記時には該キャップを筆記具の後端部から嵌合することによって、キャップ内部の突起部で収納管の加圧スプリングの後端部を所定の位置まで押圧して加圧スプリングを圧縮し、該位置でキャップを係止状態に保持させることを特徴とする。
【０００９】
請求項５に記載の発明は、上記の請求項２または３に記載の筆記具の更に好ましい具体例であって、先端筆記部を設けた筆記液収納管が外筒軸内で加圧スプリングを介して先端筆記部を外筒軸の先端から出没自在になるように装着した筆記具であって、保管時には加圧スプリングがほぼ自由長又は減圧縮されることで先端筆記部を外筒軸内へ没入させ、筆記時には収納管の加圧スプリングの後端受け部をキャップ外部からのノック式、回転ねじ込み式、又はスライド式等から選ばれた押圧手段にて前進させることで加圧スプリングを所定の位置まで圧縮し、同時に筆記液収納管が外筒軸内を前進して先端筆記部を外筒軸先端から繰り出させ該位置にて係止状態に保持させることを特徴とする筆記具である。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態について詳細に説明する。
本発明の筆記具とは、各種の筆記用又は化粧用等を対象とする。また充填される筆記液としては、筆記用の場合には通常のボールペン用インキ、又は誤記等を白色のインキで隠蔽することで修正可能とする白色インキ等である。また化粧用のばあいには流動性のある液体化粧ペイント、静止時に半固形性を呈するチキソトロピー性の化粧料等が挙げられる。また収納管の先端部に装着される筆記部の構造は、先端の球状ボールとそれを保持しているチップホルダーからなるボールペンタイプのものや、穂先或いは、ニードル弁等の流動体筆記液の流出抑制機能を具備する任意の筆記具等が挙げられるが特に限定されない。
【００１１】
さらに収納管内の筆記液末端部に接触し且つ該筆記液の消費に従って筆記液と共に管内を摺動自在な押板としては、加圧スプリングによる圧縮で変形したり筆記液で浸されないものであればその材質は限定されない。通常ボールペン等に使用される樹脂状フオロア棒であってもよい。かかる押板に接触又は連結して筆記具の後端部に配置される加圧スプリングとしては、少なくとも筆記時には押圧手段による圧縮作用で圧縮されて生じるバネ復元圧で押板を介して筆記液を加圧することが必要である。
【００１２】
ここで加圧スプリングを圧縮させる押圧手段としては、収納管の後端側に配置された加圧スプリングの後端受け部を回転、スライド、ノック等で前進させ所定の位置で係止させるものであれば特に限定されない。例えば最も簡単な構成は、収納管の後端部にねじ込み式に固着した尾栓の一部を加圧スプリングの後端受け部とする場合である。この場合、尾栓を直接固定した場合には加圧スプリングは常時圧縮状態で固定されるため、保管時は勿論、筆記時でも常時圧縮した状態となる。この場合には筆記時以外での塗付部からの液洩れを防止するキャップ手段又はチップホルダーと筆記部のボールの密着によるシール性が必要になる。
【００１３】
本発明では、筆記時の圧縮した状態から筆記時以外には加圧スプリングがほぼ自由長又は一部復元により減圧縮される構成とすることが望ましい。かかる本発明の好ましい実施形態としては、筆記時に加圧スプリングの後端受け部が外部からの押圧手段による圧縮作用を受けられるように、収納管の尾栓を回転ねじ込み式にて前後進可能にさせるか、或いは尾栓を収納管後端に固定せずその一部を突出させた加圧スプリングの後端受け部とし、該後端受け部を外部からノック式や回転ネジ込み式又はスライド方式などの押圧手段にて前進させることで加圧スプリングを所定の位置まで圧縮し該位置に係止状態に保持させるものである。これによって生産コストが低く、筆記時以外での塗付部からの液洩れを防止し、且つ筆記時での描線切れや塗付切れ等が発生しない筆記具を提供できる。
【００１４】
【実施例】
以下、本発明の具体的な実施例を図示例と共に説明する。
【００１５】
実施例１
図１は、尾栓を押圧手段に利用する本発明の基本的な筆記具の第１の実施例を示す縦断面図である。まず図１に示した筆記具は、流動性の筆記液２が充填されている収納管１の先端部にボール３とそれを保持しているチップホルダー４などからなる筆記部が装着されてなるボールペンタイプの筆記具であって、収納管１内には流動性筆記液２の後端面に接触し且つ該筆記液の消費に従って管内壁面を筆記液と共に密接して摺動する押板５が配置されている。また押板５には収納管１の後端部の尾栓６の一部を受け部材８として設置された加圧スプリング７の先端が接触又は連結して配置されている。ここで尾栓６を加圧スプリング７が所定の寸法の長さに圧縮させた状態で収納管１の後端部に固定した場合には、加圧スプリング７のバネ圧で押板５が常時筆記液２を加圧する。この場合、塗付時以外には収納管の先端筆記部にキャップを嵌合させて筆記液の洩れを防止するか又はチップホルダーと筆記部のボールの密着によるシール性が必要になる。
【００１６】
図１における尾栓６の変形として、収納管内へ突出する受け部材８を比較的長い円筒部とし、その外周に収納管内壁に設けられたネジ溝と係合するねじ山を設けることによって、塗付時に尾栓６を適宜回転させることで収納管内へ尾栓の円筒部８をねじ込み式に前進または後退させて加圧スプリング７を圧縮又は減圧縮させる構成とすることができる。この場合、ねじ込み式のため任意の位置で係止状態に保持させることができる。従って筆記時には加圧スプリング７が常時圧縮されてそのバネ復元圧で筆記液が加圧されるので、途中で塗付切れ等が生じない。保管時にはねじ込み式の尾栓６を後退させて加圧スプリングを減圧縮させるか、ほぼ自由長に復元するように配置することで筆記液の先端からの洩れを防止することができる。
【００１７】
実施例２
図２（ａ）〜（ｃ）は、尾栓を貫通する外部突出のノック棒を押圧手段に利用する本発明の第２の実施例を示す塗付具の縦断面図である。
図２（ａ）は保管時の状態、図２（ｂ）は塗付時の状態を示すものであり、図２（ｃ）はノック棒の縦断面図である。なお図中の符号で前記した図１で使用したものと同じものは、その図１と同じ意味を表すものとする。先ず保管時状態の図２（ａ）においては、収納管１に、塗付液２と押板５及び押板に先端が接触する加圧スプリング７がほぼ自由長さ状態で収納管１内に配置され、且つ該加圧スプリング７の後端部は、収納管の後端部に固定した尾栓６の中心部に設けた貫通孔を自在に摺動する外部突出部９を有するノック棒の先端に形成されたスプリング受け部１０で受け止められて固定されている。
【００１８】
さらにノック棒には、図２（ｃ）に示すように中空体の一部壁面に上向き弾性力を付与されたツメ部１１が形成されている。一方収納管１のスプリング受け部１０よりも後端側の側壁にはツメ部１１を係止する小孔１２と後端部には一端を固定されて先端方向へ伸びる懸け止め部材１３が形成されており、さらに懸け止め部材１３の一部には小孔１２に陥没可能な突起部１４とが形成されている。
次に、塗付時の状態を示す図２（ｂ）においては、ノック棒の外部突出部９を収納管１の内部へ押し込み前進させると所定の位置でノック棒のツメ部１１が収納管の小孔１２内へ弾性力で突き出されて係止される。
【００１９】
この位置でノック棒９の先端に形成されたスプリング受け部１０が加圧スプリング７を圧縮しそのバネ復元圧で該押板５が筆記液２を加圧することから、筆記液２は先端筆記部からスムーズに押出されて塗付状態に維持される。従って上向き筆記であっても筆記描線切れ等の発生が防止される。なお、筆記が完了した場合には、懸け止め部材１３の突起部１４を収納管１の小孔１２へ押し込むことでノック棒のツメ部１１を小孔１２から外せば、加圧スプリング７の復元力でノック棒の外部突出部９は押し戻される。これによって加圧スプリング７は、ほぼ自由長さ状態で収納管１内に保持される。この場合、図示していないが塗付部の先端には、塗付剤の乾燥を防止するキャップを取り付けることが望ましい。
【００２０】
実施例３
図３（ａ）〜（ｂ）は筆記部の保護や乾燥防止のために内部に突起部を設けたキャップを押圧手段に利用する本発明の第３の実施例を示す縦断面図である。ここで図３（ａ）は、保管時に塗付部先端にキャップを嵌め込んで筆記部の保護状態を示す縦断面図である。図３（ｂ）は塗付時において塗付具の後端部にキャップを嵌め込んで加圧スプリング７を所定の寸法に圧縮させた状態を示す。なお図中の符号で前記した図１〜２で使用したものと同じものは、同じ意味を表すものとする。図３（ａ）において、塗付部先端に嵌め込まれたキャップ１５の内部には長手方向に伸びた筒状の突起部１６が設けられ、その内部には塗付部のボール先端を保護してシールするための球状の弾性体１７が装着されている。
【００２１】
一方収納管１には、塗付液２と押板５及び該押板に先端が接触する加圧スプリング７がほぼ自由長さ状態で収納管１内に配置され、該加圧スプリング７の後端部は収納管１の後端部から突出したスプリング受け部１８に固定され、さらにスプリング受け部１８には長い連結棒１９を介して尾栓６が配置されている。
ここで収納管１の一部と尾栓６は、小径段差部２０及び該段差部に設けた突起部（又は凹み部）２１が形成された外筒軸２２で被覆されている。また、収納管１の後端部と尾栓６の間には必要に応じて戻しスプリング２３が装着されている。
【００２２】
この場合の塗付時には、図３（ｂ）に示すようにキャップ１５を塗付具後端の外筒軸２２の小径段差部２０に嵌め込むことによってキャップ１５に設けた長手方向に伸びた筒状の突起部１６が尾栓６を押し込み、それに伴って連結棒１９を介して加圧スプリングの受け部１８が押圧されて加圧スプリング７が圧縮される。なおキャップ１５の内部には図示していないが所定の位置でリング状その他の凹み部（又は凸部）を設けて外筒軸２２の小径段差部２０に設ける突起部（又は凹み部）２１で係止させる。なお小径段差部２０に設ける突起部（又は凹み部）２１を所定の間隔で複数箇所に設置して塗付液の消費に従ってキャップ１５の係止位置を変えて加圧スプリング７の圧縮長さを自由に変更するようにしてもよい。キャップ１５を外せば加圧スプリング７は復元力でほぼ自由長に戻って保持されることとなる。
【００２３】
また戻しスプリング２３はキャップを取り外したときに尾栓６がふらふらしないように元の位置に正確に戻す作用をするが必ずしも必須要件とするものではない。なおこの実施例３の変形例として、外筒軸２２を装着させないで収納管１の後端部を延長しその外表面に小径段差部２０及び突起部２１を設けてもよい。またキャップ１５で尾栓６を押す突起部１６はキャップの内部に限定するものではなくキャップの天面部に設けられていてもよく、さらに尾栓６が外筒軸２２の後端部から出ていてもかまわない。
この実施例３によれば、筆記時以外にはキャップで先端筆記部の保護や乾燥防止が図られ、しかも加圧スプリングがほぼ自由長に維持されることから塗付液の洩れがない。一方、筆記時には加圧スプリングの圧縮によるバネ圧で筆記液を加圧することから上向き筆記であっても筆記描線切れ等の発生が防止される。
【００２４】
実施例４
図４（ａ），（ｂ）は、先端筆記部を設けた筆記液収納管が外筒軸内で加圧スプリングを介して先端筆記部を外筒軸の先端から出没自在になるように装着した本発明の第４の実施例を示す筆記具の縦断面図である。特に使用者がノック等の動作により筆記部を先端から繰り出し確実に筆記できる機構を取り入れたものである。ここで図４（ａ）は、筆記部先端を外筒軸内に没入した保管時の状態を示す縦断面図である。図４（ｂ）は筆記部先端を外筒軸外へ突出された塗付時の状態を示す縦断面図である。なお図中の符号で前記した図１〜図３で使用したものと同じものは、同じ意味を表すものとする。
図４（ａ）においては、前部の外筒軸２４に後部の外筒軸２５が嵌合され連結一体化された外筒軸内に、収納管１が装着されて筆記部３が前部外筒軸２４の縮小する先端内壁部と収納管１の縮小先端部の間に設置した戻しスプリング２６のバネ圧で前部外筒軸先端からの没入を補助する構成とされている。一方、加圧スプリング７は先端部が押板５に、後端部が収納管１の後端から摺動自在に分離され一端を閉塞した管状尾栓２７の内部を受け部としてほぼ自由長の状態で配置されている。
【００２５】
管状尾栓２７には縮小段差部２８が形成され、該縮小段差部２８には後部外筒軸２５の後端部の内壁部に一部を残して外部へ突出する筒状部２９の先端部が摺動自在に嵌め込まれる。さらに筒状部２９の外端縮小部にはクリップ３０が固定されており、該クリップ３０を押し込むことで筒状部２９が管状尾栓２７を収納管１に接近するようにスライドさせる外部からの押圧手段を形成している。なおクリップ３０と筒状部２９の外端縮小部の間には適宜懸け止め部材１３を有するキャップ３１が一体化されて外筒軸２５の後端部に摺動自在に、さらに必要により回転自在に取り付けられる。また筒状部２９の先端外周部には適宜加圧スプリング７の圧縮長さを係止させる突起部３２が形成されている。
【００２６】
図４（ｂ）に示す筆記時には、押圧手段を形成しているクリップ３０又はキャップ３１を押し込むことで筒状部２９が管状尾栓２７を収納管１の後端部に接近するようにスライドさせる。管状尾栓２７の先端部が収納管１の後端部に接触した段階で、加圧スプリング７の圧縮率は最大となる。更にクリップ３０又はキャップ３１を押し込むに従って収納管１自体が外筒軸２５内を前進して収納管１の先端部付近との間に設置した戻しスプリング２６が圧縮されて筆記部３が外筒軸先端から突き出され筆記可能状態に繰り出される。その段階でキャップ３１を一部回転させるとキャップと一体化された筒状部２９の先端外周部の突起部３２が外筒軸２５の内部に設けた図示されていない凹み部と係合して係止されこの位置で加圧スプリング７の圧縮長さを係止させることができる。
【００２７】
この状態では管状尾栓２７の先端が収納管１を後端部から押しているので加圧スプリングの設置寸法は決まり、その状態で加圧スプリングは圧縮されており、塗付液には押板を介して圧力が加えられている。塗付作業の進行につれて塗付液が消費されても、上述の状態と同じで塗付液がなくなった状態まで加圧スプリングは塗付液に圧力を加えられるように設定することが望ましい。
塗付作業を終えた後は、キャップ３１を一部回転させるだけで筒状部２９の先端外周部の突起部３２が外れて戻しスプリング２６と加圧スプリング７の復元力で収納管１の先端塗付部が外筒軸２５内へ戻され、さらに加圧スプリング７はほぼ自由長さの状態に戻される。なお加圧スプリングへの押圧手段としたは、前記したキャップ外部からのノック式の他に、回転ねじ込み式、又はスライド式等が挙げられる。
【００２８】
【発明の効果】
以上、説明したように本発明によれば、加圧スプリングの圧縮によるバネ圧を使用して、使用時に塗付液に圧力を加え続けて塗付性能を向上させるもので、加圧気体を使用するものに比べて構成部材の密封性が不要であり、製造コストを高めることなく目的とする効果が得られるという優れた効果を奏し得る。
【図面の簡単な説明】
【図１】本発明の基本的な構成を示すボールペンタイプの筆記具の一例を示す縦断面図である。
【図２】（ａ）本発明の実施例２における保管時の状態を示す縦断面図である。
（ｂ）実施例２における塗付時の状態を示す縦断面図である。
（ｃ）ノック棒を示す縦断面図である。
【図３】（ａ）本発明の実施例３における保管時の状態を示す縦断面図である。
（ｂ）実施例３における塗付時の状態を示す縦断面図である。
【図４】（ａ）実施例４における保管時の状態を示す縦断面図である。
（ｂ）実施例４における塗付時の状態を示す縦断面図である。
【符号の説明】
１　収納管
２　流動性筆記液
３　ボール
４　チップホルダー
５　押板
６　尾栓
７　加圧スプリング
８　尾栓の円筒部
９　ノック棒の外部突出部
１０　スプリング受け部
１１　ツメ部
１２　ツメ部の係止小孔
１３　懸け止め部材
１４　突起部
１５　キャップ
１６　筒状の突起部
１７　球状の弾性体
１８　スプリング受け部
１９　連結棒
２０　小径段差部
２１　段差部に設けた突起部（又は凹み部）
２２　外筒軸
２３　戻しスプリング
２４　前部外筒軸
２５　後部外筒軸
２６　戻しスプリング
２７　管状尾栓
２８　縮小段差部
２９　筒状部
３０　クリップ
３１　キャップ
３２　突起部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a writing instrument for writing or cosmetics, and more particularly to a writing instrument which does not cause a break in a writing line or a break in application.
[0002]
[Prior art]
In general, a ball-point pen-type writing instrument in which a writing section consisting of a ball and a chip holder holding the ball is attached to the tip of a storage tube filled with ink is conventionally known, and is similar to this shape. An applicator containing a cosmetic has been proposed in Japanese Utility Model Application Laid-Open No. 55-177315. However, cosmetics are more likely to write upward when used than normal ball-point pens, and are likely to suffer from broken writing lines, which is a weak point of normal ball-point pens. As a countermeasure against this, even if the ink (or cosmetic) is pressurized from the rear end of the ink and the ink (or cosmetic) is applied to the ball of the writing part during writing and a force is applied to the writing surface, the ink is applied to the writing surface even when writing upward. Even if a gap is formed between the ball and the chip, the ink is filled with the pressurized ink and the ink does not run out. As a means therefor, a pressurized ballpoint pen utilizing the compressive force of gas has been proposed, which has an advantage that not only a measure against upward writing but also the drawing line is stabilized during normal use.
[0003]
[Problems to be solved by the invention]
However, there was a type in which the compressed gas was sealed on the shaft to use the pressurization.However, since the pressing force was constantly applied to the writing part, perfect adhesion and sealing properties between the ball and the tip of the writing part were required. If the tip member requires dimensional accuracy, and the sealing property is poor, ink leakage occurs from the writing portion due to the applied pressure. Also, in order to obtain high confidentiality in the shaft portion, caulking or the like is required in the accuracy of parts and in the production process, which hinders quality maintenance and production, and costs are increased. In addition, a pumping type pressurizing mechanism is provided at the rear end of the ink storage tube during use, and the pressurizing mechanism is operated forward by knocking operation to push air into the rear end hole of the ink storage tube and pressurize the liquid. Although proposed (Japanese Patent Application Laid-Open No. 2001-171287), production costs are high due to strict requirements on confidentiality. In view of such circumstances, an object of the present invention is to provide a writing implement that does not have a strict requirement for confidentiality and has a low production cost and does not suffer from cuts in writing lines or coating.
[0004]
[Means for Solving the Problems]
The present inventors have conducted various studies to solve this problem, and as a result, have used the spring pressure due to the compression of the spring without using the compressive force of gas, which is difficult to maintain confidentiality. Studied a method of reducing or applying no spring pressure to the ink. As a result, a pressing plate that comes into contact with the rear end surface of the writing liquid is slidably provided in the storage tube, and the pressing plate is pressed by the spring restoring pressure due to the compression of the spring during writing, and the compression of the spring is reduced or reduced except during writing. The present invention of the open type has been completed.
[0005]
That is, in the writing instrument according to claim 1 of the present invention, in a writing instrument having a writing section attached to the tip of a storage tube filled with writing liquid, the inside of the storage tube is kept in contact with the writing liquid rear end face of the storage tube. The sliding pressing plate comes into contact with the distal end of the pressing spring arranged on the rear end side of the storage tube, and at least at the time of writing, the pressing spring is subjected to a compressive action, and writing is performed via the pressing plate by the spring restoring pressure. The liquid is pressurized.
[0006]
According to a second aspect of the present invention, in the writing instrument according to the first aspect, the pressurizing spring is set to have a substantially free length or a reduced compression during storage, and a rear end of the pressurizing spring is externally arranged during writing. The compression dimension of the spring while being subjected to the compression action by the pressing means is set to be equal to or larger than the amount by which the pressing plate advances when the writing liquid is consumed. I do.
[0007]
The invention according to claim 3 is a preferred embodiment of the writing instrument according to claim 1 or 2, wherein a rear end portion of the pressure spring of the storage tube is knocked, rotated, or slided during writing. The pressure spring is compressed to a predetermined position by being advanced by an external pressing means such as a type, and is held in a locked state at this position.
[0008]
The invention according to claim 4 is a preferred embodiment of the writing instrument according to any one of claims 1 to 3, wherein a cap provided with a protruding portion for protecting the tip writing portion during storage is provided. By fitting into the tip writing portion and fitting the cap from the rear end of the writing instrument during writing, the projection inside the cap presses the rear end of the pressure spring of the storage tube to a predetermined position to apply. The compression spring is compressed to hold the cap in the locked state at the position.
[0009]
The invention according to claim 5 is a further preferable specific example of the writing instrument according to claim 2 or 3, wherein the writing liquid storage pipe provided with the tip writing portion is provided with a pressure spring in the outer cylinder shaft. A writing instrument with the tip writing part attached to the tip of the outer cylinder shaft so that it can be freely retracted from the tip of the outer cylinder shaft. At the time of writing, the rear end receiving portion of the pressure spring of the storage tube is advanced by a pressing means selected from a knock type, a rotary screw type, or a slide type from the outside of the cap, so that the pressure spring is moved to a predetermined position. The writing instrument is characterized in that the writing liquid storage tube is advanced to the inside of the outer cylinder shaft at the same time, and the tip writing portion is extended from the tip of the outer cylinder shaft and held in the locked state at this position.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
The writing implement of the present invention is intended for various writing or cosmetic purposes. The writing liquid to be filled is, for writing, a normal ballpoint pen ink, or a white ink that can be corrected by concealing erroneous writing or the like with a white ink. In the case of cosmetics, a liquid cosmetic paint having fluidity, a thixotropic cosmetic exhibiting semi-solidity at rest, and the like can be mentioned. In addition, the structure of the writing part attached to the tip of the storage tube is a ballpoint pen type consisting of a spherical ball at the tip and a tip holder holding the ball, or a fluid writing liquid such as a spike or a needle valve. Any writing instrument having a suppression function may be used, but is not particularly limited.
[0011]
Further, as a pressing plate which comes into contact with the writing liquid end portion in the storage tube and is slidable in the tube together with the writing liquid as the writing liquid is consumed, any pressing plate which is not deformed by compression by a pressure spring or immersed in the writing liquid can be used. The material is not limited. It may be a resin-like follower stick usually used for a ballpoint pen or the like. As a pressure spring which is disposed at the rear end of the writing instrument in contact with or connected to the pressing plate, at least at the time of writing, the writing liquid is applied through the pressing plate by a spring restoring pressure generated by compression by a pressing action of the pressing means. It is necessary to press.
[0012]
Here, as the pressing means for compressing the pressure spring, the rear end receiving portion of the pressure spring disposed on the rear end side of the storage tube is rotated, slid, knocked, etc., and locked at a predetermined position. There is no particular limitation as long as it exists. For example, the simplest configuration is a case where a part of the tail plug screwed to the rear end of the storage tube is used as the rear end receiving portion of the pressure spring. In this case, when the tail plug is directly fixed, the pressure spring is always fixed in a compressed state, so that the compression spring is always compressed not only during storage but also during writing. In this case, it is necessary to provide a cap means for preventing leakage of the liquid from the coating portion other than at the time of writing or a sealing property due to the close contact between the chip holder and the ball of the writing portion.
[0013]
In the present invention, it is desirable that the pressure spring is reduced in compression by a substantially free length or a partial restoration from a compressed state at the time of writing except at the time of writing. As a preferred embodiment of the present invention, the tail plug of the storage tube can be moved forward and backward by a rotary screw type so that the rear end receiving portion of the pressure spring can be subjected to a compression action by an external pressing means at the time of writing. Alternatively, the tail plug is not fixed to the rear end of the storage tube, and a part thereof is made to protrude as a rear end receiving portion of the pressure spring, and the rear end receiving portion is knock-type, rotary screw-in type, or slide type from outside. The pressure spring is compressed to a predetermined position by being advanced by a pressing means such as the above, and is held at the position in a locked state. Accordingly, it is possible to provide a writing implement that has low production cost, prevents liquid from leaking from the application part during writing other than writing, and does not cause a break in drawing or coating during writing.
[0014]
【Example】
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
[0015]
Example 1
FIG. 1 is a longitudinal sectional view showing a first embodiment of a basic writing instrument of the present invention using a tail plug as a pressing means. First, the writing implement shown in FIG. 1 is a ball-point pen having a writing part composed of a ball 3 and a chip holder 4 holding the ball 3 attached to the tip of a storage tube 1 filled with a fluid writing liquid 2. In the writing instrument of the type, a pressing plate 5 which is in contact with the rear end face of the flowable writing liquid 2 and which slides in close contact with the writing liquid along the inner wall of the pipe with consumption of the writing liquid is arranged in the storage tube 1. I have. Further, a tip of a pressure spring 7 installed as a receiving member 8 as a receiving member 8 is arranged in contact with or connected to a part of the tail plug 6 at the rear end of the storage tube 1 on the push plate 5. Here, when the tail plug 6 is fixed to the rear end of the storage tube 1 in a state where the pressing spring 7 is compressed to a predetermined length, the pressing plate 5 is always pressed by the spring pressure of the pressing spring 7. The writing liquid 2 is pressurized. In this case, it is necessary to prevent the writing liquid from leaking by fitting a cap to the writing portion at the tip of the storage tube other than at the time of coating, or it is necessary to have a sealing property by the close contact between the chip holder and the ball of the writing portion.
[0016]
As a modification of the tail plug 6 in FIG. 1, the receiving member 8 protruding into the storage tube is formed as a relatively long cylindrical portion, and a thread which engages with a thread groove provided on the inner wall of the storage tube is provided on the outer periphery thereof. By appropriately rotating the tail plug 6 at the time of attachment, the cylindrical portion 8 of the tail plug can be screwed forward or backward into the storage tube to compress or decompress the pressure spring 7. In this case, since it is a screw type, it can be held in a locked state at an arbitrary position. Therefore, at the time of writing, the pressure spring 7 is constantly compressed, and the writing liquid is pressurized by the spring restoring pressure. At the time of storage, the screw-in type tail plug 6 is retracted to reduce the compression of the pressure spring or is arranged so as to be restored to a substantially free length, thereby preventing the writing liquid from leaking from the tip.
[0017]
Example 2
2 (a) to 2 (c) are longitudinal sectional views of an applicator showing a second embodiment of the present invention in which a knock bar protruding outside penetrating a tail plug is used as a pressing means.
2A shows a state at the time of storage, FIG. 2B shows a state at the time of application, and FIG. 2C is a longitudinal sectional view of the knock bar. The same reference numerals as those used in FIG. 1 described above denote the same meanings as those in FIG. First, in FIG. 2 (a) in a storage state, the coating liquid 2 and the pressing plate 5 and the pressure spring 7 whose tip is in contact with the pressing plate are placed in the storage tube 1 in a substantially free length state. A rear end of the pressure spring 7 is disposed on a rear end of the knocking rod having an external protrusion 9 that freely slides through a through hole provided in the center of the tail plug 6 fixed to the rear end of the storage tube. It is received and fixed by a spring receiving portion 10 formed at the tip.
[0018]
Further, as shown in FIG. 2 (c), the knock bar has a claw portion 11 having an upward elastic force applied to a partial wall surface of the hollow body. On the other hand, a small hole 12 for locking the claw portion 11 is formed on a side wall on the rear end side of the spring receiving portion 10 of the storage tube 1, and a locking member 13 fixed at one end and extending in the front end direction is formed on the rear end portion. Further, a projection 14 that can be depressed in the small hole 12 is formed on a part of the suspension member 13.
Next, in FIG. 2 (b) showing the state at the time of application, when the external projection 9 of the knock bar is pushed into the inside of the storage tube 1 and moved forward, the claw portion 11 of the knock bar is set at a predetermined position. It is projected into the small hole 12 by elastic force and locked.
[0019]
At this position, the spring receiving portion 10 formed at the tip of the knock rod 9 compresses the pressure spring 7 and the pressing plate 5 presses the writing liquid 2 with the spring restoring pressure. And is maintained in a coated state. Therefore, even when writing upwards, the occurrence of broken writing lines and the like is prevented. When the writing is completed, the protrusions 14 of the locking members 13 are pushed into the small holes 12 of the storage tube 1 to release the claws 11 of the knock bar from the small holes 12. The external projection 9 of the knock bar is pushed back by force. As a result, the pressure spring 7 is held in the storage tube 1 in a substantially free length state. In this case, although not shown, it is desirable to attach a cap for preventing the coating agent from drying at the tip of the coating portion.
[0020]
Example 3
FIGS. 3A and 3B are longitudinal sectional views showing a third embodiment of the present invention in which a cap provided with a projection inside for protecting a writing portion and preventing drying is used as a pressing means. Here, FIG. 3A is a longitudinal cross-sectional view showing a protection state of the writing portion by fitting a cap to the tip of the application portion during storage. FIG. 3B shows a state in which a cap is fitted to the rear end of the applicator at the time of application and the pressure spring 7 is compressed to a predetermined size. Note that the same reference numerals as those used in FIGS. 1 and 2 indicate the same meanings. In FIG. 3 (a), a cylindrical projection 16 extending in the longitudinal direction is provided inside a cap 15 fitted to the tip of the coating portion, and protects the ball tip of the coating portion inside the cap. A spherical elastic body 17 for sealing is mounted.
[0021]
On the other hand, in the storage tube 1, the coating liquid 2, the pressing plate 5, and the pressure spring 7, the tip of which is in contact with the pressing plate 5, are arranged in the storage tube 1 in a substantially free length state. The end is fixed to a spring receiving portion 18 protruding from the rear end of the storage tube 1, and the tail plug 6 is disposed on the spring receiving portion 18 via a long connecting rod 19.
Here, a part of the storage tube 1 and the tail plug 6 are covered with an outer cylinder shaft 22 having a small-diameter stepped portion 20 and a projection (or recessed portion) 21 provided in the stepped portion. A return spring 23 is mounted between the rear end of the storage tube 1 and the tail plug 6 as necessary.
[0022]
At the time of application in this case, as shown in FIG. 3 (b), the cap 15 is fitted into the small-diameter stepped portion 20 of the outer cylinder shaft 22 at the rear end of the applicator to extend the cylinder provided in the cap 15 in the longitudinal direction. The protruding portion 16 pushes the tail plug 6, and accordingly, the receiving portion 18 of the pressure spring is pressed via the connecting rod 19, and the pressure spring 7 is compressed. Although not shown, a ring-shaped or other concave portion (or convex portion) is provided at a predetermined position inside the cap 15, and a projection (or concave portion) 21 provided on the small-diameter step portion 20 of the outer cylinder shaft 22. Lock. The protrusions (or recesses) 21 provided on the small-diameter stepped portion 20 are provided at a plurality of locations at predetermined intervals, and the locking position of the cap 15 is changed according to consumption of the coating liquid to reduce the compression length of the pressure spring 7. You may make it change freely. When the cap 15 is removed, the pressure spring 7 returns to a substantially free length and is held by the restoring force.
[0023]
Also, the return spring 23 functions to accurately return the tail plug 6 to its original position so that the tail plug 6 does not wobble when the cap is removed, but this is not always an essential requirement. As a modification of the third embodiment, the rear end of the storage tube 1 may be extended without mounting the outer cylinder shaft 22, and the small-diameter step portion 20 and the projection 21 may be provided on the outer surface thereof. Further, the projection 16 for pressing the tail plug 6 with the cap 15 is not limited to the inside of the cap, but may be provided on the top surface of the cap. In addition, the tail plug 6 protrudes from the rear end of the outer cylinder shaft 22. It doesn't matter.
According to the third embodiment, the tip writing portion is protected and prevented from drying by the cap except at the time of writing, and since the pressure spring is maintained at a substantially free length, there is no leakage of the coating liquid. On the other hand, at the time of writing, the writing liquid is pressurized by the spring pressure generated by the compression of the pressure spring, so that the occurrence of broken writing lines and the like can be prevented even in upward writing.
[0024]
Example 4
FIGS. 4 (a) and 4 (b) show that a writing liquid storage tube provided with a tip writing portion is mounted so that the tip writing portion can be freely protruded and retracted from the tip of the outer cylinder shaft via a pressure spring in the outer cylinder shaft. FIG. 11 is a longitudinal sectional view of a writing instrument according to a fourth embodiment of the present invention. In particular, it incorporates a mechanism that allows the user to draw out the writing portion from the tip by the action of knocking or the like and to reliably write. Here, FIG. 4A is a longitudinal sectional view showing a state at the time of storage in which the tip of the writing portion is immersed in the outer cylinder shaft. FIG. 4B is a longitudinal cross-sectional view showing a state at the time of application in which the tip of the writing portion is projected outside the outer cylinder axis. The same reference numerals as those used in FIGS. 1 to 3 denote the same meanings.
In FIG. 4 (a), the housing tube 1 is mounted in the outer cylinder shaft 25 in which the outer cylinder shaft 25 in the rear portion is fitted and connected to the outer cylinder shaft 24 in the front portion. It is configured to assist the immersion from the front end of the front outer cylinder shaft by the spring pressure of the return spring 26 installed between the contracted inner wall portion of the outer cylinder shaft 24 and the reduced end portion of the storage tube 1. On the other hand, the pressurizing spring 7 has a substantially free length as a receiving portion for receiving the inside of the tubular tail plug 27 having a distal end portion which is slidably separated from the rear end of the storage tube 1 and a rear end portion of which is slidably separated from the rear end. It is arranged in a state.
[0025]
A reduced step portion 28 is formed in the tubular tail plug 27, and the reduced step portion 28 has a distal end portion of a cylindrical portion 29 that protrudes to the outside while leaving a part of the inner wall at the rear end of the rear outer cylinder shaft 25. Are slidably fitted. Further, a clip 30 is fixed to the outer end reduced portion of the cylindrical portion 29, and when the clip 30 is pushed in, the cylindrical portion 29 slides the tubular tail plug 27 so as to approach the storage tube 1. A pressing means is formed. In addition, a cap 31 having an appropriate retaining member 13 is integrated between the clip 30 and the outer end reduced portion of the cylindrical portion 29 so as to be slidable on the rear end of the outer cylindrical shaft 25 and further rotatable as necessary. Attached to. A projection 32 is formed on the outer periphery of the distal end of the cylindrical portion 29 to appropriately lock the compression length of the pressure spring 7.
[0026]
At the time of writing shown in FIG. 4B, the tubular portion 29 is slid so that the tubular tail plug 27 approaches the rear end of the storage tube 1 by pushing in the clip 30 or the cap 31 forming the pressing means. . When the distal end of the tubular tail plug 27 comes into contact with the rear end of the storage tube 1, the compression ratio of the pressure spring 7 becomes maximum. Further, as the clip 30 or the cap 31 is pushed in, the storage tube 1 itself advances in the outer cylinder shaft 25 and the return spring 26 installed between the storage tube 1 and the vicinity of the distal end portion thereof is compressed, and the writing unit 3 is moved to the outer cylinder shaft. It protrudes from the tip and is fed out to a writable state. When the cap 31 is partially rotated at that stage, the projection 32 on the outer peripheral end of the cylindrical portion 29 integrated with the cap engages with a not-shown recess provided inside the outer cylinder shaft 25. The compression length of the pressure spring 7 can be locked at this position.
[0027]
In this state, since the distal end of the tubular tail plug 27 pushes the storage tube 1 from the rear end, the installation size of the pressure spring is determined. In this state, the pressure spring is compressed, and the pressing plate is applied to the coating liquid. Pressure is applied through. Even if the coating liquid is consumed as the coating operation progresses, it is desirable that the pressure spring be set so that the pressure can be applied to the coating liquid until the coating liquid is exhausted as in the above-described state.
After the coating operation is completed, the protrusion 32 on the outer peripheral portion of the distal end of the tubular portion 29 is disengaged by simply rotating the cap 31 partially, and the restoring force of the return spring 26 and the pressing spring 7 causes the distal end of the storage tube 1 to return. The application part is returned to the inside of the outer cylinder shaft 25, and the pressure spring 7 is returned to a substantially free length state. As a means for pressing the pressure spring, in addition to the above-mentioned knock type from the outside of the cap, a rotary screw-in type, a slide type and the like can be mentioned.
[0028]
【The invention's effect】
As described above, according to the present invention, a spring pressure generated by compression of a pressure spring is used to continuously apply pressure to a coating liquid during use to improve coating performance. As compared with the conventional method, the sealing property of the constituent members is not required, and an excellent effect that the desired effect can be obtained without increasing the manufacturing cost can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of a ballpoint pen type writing instrument showing a basic configuration of the present invention.
FIG. 2 (a) is a longitudinal sectional view showing a state at the time of storage in Embodiment 2 of the present invention.
(B) It is a longitudinal section showing the state at the time of application in Example 2.
(C) It is a longitudinal section showing a knock bar.
FIG. 3 (a) is a longitudinal sectional view showing a state at the time of storage in Embodiment 3 of the present invention.
(B) It is a longitudinal section showing the state at the time of application in Example 3.
FIG. 4A is a longitudinal sectional view illustrating a state at the time of storage in a fourth embodiment.
(B) It is a longitudinal section showing the state at the time of application in Example 4.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage pipe 2 Fluid writing liquid 3 Ball 4 Tip holder 5 Push plate 6 Tail plug 7 Pressure spring 8 Cylindrical part of tail plug 9 External projection part of knock bar 10 Spring receiving part 11 Claw part 12 Small locking of nail part Hole 13 Suspension member 14 Projection 15 Cap 16 Cylindrical projection 17 Spherical elastic body 18 Spring receiver 19 Connecting rod 20 Small diameter step 21 Projection (or recess) provided at step
22 outer cylinder shaft 23 return spring 24 front outer cylinder shaft 25 rear outer cylinder shaft 26 return spring 27 tubular tail plug 28 reduced step portion 29 cylindrical portion 30 clip 31 cap 32 projecting portion

Claims

In a writing instrument in which a writing portion is attached to the tip of a storage tube filled with writing liquid, a push plate that slides inside the storage tube while being in contact with the writing liquid rear end surface of the storage tube is disposed at the rear end side of the storage tube. A writing implement, wherein the writing spring comes into contact with the tip end of the applied pressure spring, and at least at the time of writing, the pressure spring is subjected to a compressive action, and the writing liquid is pressurized via the pressing plate by the spring restoring pressure.

At the time of storage, the pressure spring is set to have a substantially free length or a reduced compression, and at the time of writing, the rear end of the pressure spring is subjected to a compressing action by an external pressing means, and the compressed size of the spring is written. 2. The writing implement according to claim 1, wherein the writing plate is set to be equal to or more than an amount by which the push plate advances when the liquid is consumed.

At the time of writing, the rear end of the pressure spring of the storage tube is advanced by an external pressing means such as a knock type, a rotary screw type, or a slide type to compress the pressure spring to a predetermined position, and engage at this position. The writing instrument according to claim 1, wherein the writing instrument is held in a stopped state.

At the time of storage, a cap provided with a projection inside for protection of the tip writing portion and prevention of drying is fitted to the tip writing portion, and at the time of writing, the cap is fitted from the rear end of the writing instrument, thereby making the inside of the cap. 4. A rear end portion of the pressure spring of the storage tube is pressed to a predetermined position by the projection, thereby compressing the pressure spring, and holding the cap in the locked state at the position. The writing implement according to any one of the above.

A writing implement in which a writing liquid storage tube provided with a tip writing part is attached so that the tip writing part can be protruded and retracted from the tip of the outer cylinder shaft via a pressure spring in the outer cylinder shaft. Is almost free length or reduced compression, so that the tip writing part is immersed in the outer cylinder shaft, and at the time of writing, the rear end receiving part of the pressure spring of the storage tube is knocked from the outside of the cap, rotated screw type, or slide The pressure spring is compressed to a predetermined position by being advanced by a pressing means selected from the formula etc., and at the same time, the writing liquid storage tube is advanced in the outer cylinder shaft and the tip writing part is extended from the outer cylinder shaft tip. The writing instrument according to claim 2, wherein the writing instrument is held in the locked state at the position.