JP3739476B2

JP3739476B2 - Reciprocating electric razor

Info

Publication number: JP3739476B2
Application number: JP06306996A
Authority: JP
Inventors: 運司伊藤
Original assignee: Izumi Products Co
Current assignee: Maxell Izumi Co Ltd
Priority date: 1996-03-19
Filing date: 1996-03-19
Publication date: 2006-01-25
Anticipated expiration: 2016-03-19
Also published as: JPH09253353A

Description

【０００１】
【発明の属する技術分野】
本発明は往復式電気かみそりに関し、特に詳細には並設された一対の仕上げ剃り刃間に、粗剃り刃が配された往復式電気かみそりに関する。
【０００２】
【従来の技術】
従来の往復式電気かみそりについて図１２〜図１５を用いて説明する。
往復式電気かみそり１００は、離間して平行に並設された一対の仕上げ剃り刃１０２間に、この仕上げ剃り刃１０２と平行となるように癖髭を剃るための粗剃り刃１０４が配されている。
２つの仕上げ剃り刃１０２は、図１２に示すようにネット状の仕上げ剃り外刃１０６がアーチ状に湾曲した状態で仕上げ剃り刃ホルダ（不図示）に取り付けられ、電気かみそり１００のボディ部（不図示）の上部に脱着自在に取り付けられる外刃ホルダ１０８に装着されている。なお、仕上げ剃り内刃（不図示）はボディ部の上部に往復動自在に突設され、外刃ホルダ１０８がボディ部に装着された際には仕上げ剃り外刃１０６の内面と当接する。
【０００３】
また、粗剃り刃１０４は図１２に示すように粗剃り外刃１１０と粗剃り内刃１１２とから構成されている。
この粗剃り外刃１１０は図１３に示すように、金属製の薄板を断面コ字状に折曲して形成され、一対の第１の折曲部１１４間を連絡する第１の連絡部１１６には、両方の第１の折曲部１１４に入り込む所定幅の第１のスリット１１８が一定の間隔を開けて粗剃り外刃１１０の長手方向に複数設けられている。なお、各第１のスリット１１８は粗剃り外刃１１０の長手方向に対して直交する方向に形成されている。
また、粗剃り内刃１１２も粗剃り外刃１１０と同様に、図１４に示すように金属製の薄板を断面コ字状に折曲して形成され、一対の第２の折曲部１２０間を連絡する第２の連絡部１２２には、両方の第２の折曲部１２０に入り込む所定幅の第２のスリット１２４が一定の間隔を開けて粗剃り内刃１１２の長手方向に複数設けられている。なお、各第２のスリット１２４は粗剃り内刃１１２の長手方向に対して直交する方向に形成されている。
【０００４】
そして、粗剃り内刃１１２の第２の折曲部１２０間の間隔は、粗剃り外刃１１０の第１の折曲部１１４間の間隔より若干幅狭に形成されており、粗剃り内刃１１２が粗剃り外刃１１０内に、図１２に示すように第２の連絡部１２２が第１の連絡部１１６と当接した状態で装着される構造となっている。
これにより、粗剃り内刃１１２が往復動することで、粗剃り外刃１１０および粗剃り内刃１１２の各スリット１１８、１２４間に取り込まれた癖髭を剃ることが可能となる。
【０００５】
【発明が解決しようとする課題】
しかしながら、上記従来の往復式電気かみそりには次のような課題がある。
電気かみそりは、通常は肌１２６に対して両仕上げ剃り刃１０２が同時に当接するようにして使用される。このため粗剃り刃１０４は、その粗剃り外刃１１０の第１の連絡部１１６が肌１２６に密着した状態で使用されることになり、肌１２６から突出した癖髭の殆どは、図１５に示すように粗剃り外刃１１０の第１の連絡部１１６ではなく、第１の折曲部１１４に開口する第１のスリット１１８部分から取り込まれて剃られることになる（図１５の髭１２８ａ参照）。
しかしながら、図１５で示すように癖髭にも種々あり、特に第１のスリット１１８の開口幅Ｇよりも大きく曲がっていたり、また寝ていたりするようなもの（図１５中の１２８ｂや１２８ｃ）や、第１の折曲部１１４での第１のスリット１１８の長さＨより長いもの（１２８ｄ）は、当然に第１のスリット１１８には取り込まれず、剃ることもできない。かといって、第１のスリット１１８の開口幅Ｇは、肌１２６自体を切らないようにするといった安全性を考慮すると一定の幅以上には広くすることができず、また長さＨも粗剃り外刃１１０の強度を考慮すると限界があり、一定の長さ以上にはできないという課題がある。
【０００６】
従って、本発明は上記課題を解決すべくなされ、その目的とするところは、大きく曲がっていたり、また寝ていたりする癖髭も確実に剃ることが可能な往復式電気かみそりを提供することにある。
【０００７】
【課題を解決するための手段】
本発明は上記目的を達成するため次の構成を備える。
すなわち、離間して並設された一対の仕上げ剃り刃間に、粗剃り刃が配されて成る往復式電気かみそりにおいて、前記粗剃り刃は、長尺な平板状に形成されると共に、前記各仕上げ剃り刃側の両端側には第１の歯列が形成された粗剃り外刃と、前記粗剃り外刃の内側に、該粗剃り外刃の長手方向に沿って往復動自在に配されると共に、前記各第１の歯列の内面に摺接する一対の第２の歯列を有する断面コ字状に形成された粗剃り内刃と、前記粗剃り外刃の両端と同じ幅の挿入孔が頭部に設けられ、前記挿入孔に前記粗剃り外刃の両端が挿入されて前記粗剃り外刃の両端に取り付けられた一対の粗剃り刃ホルダとを備え、前記粗剃り内刃は、前記粗剃り刃ホルダから前記粗剃り外刃の長手方向に平行に延出するガイドアームに、前記粗剃り外刃の長手方向と平行に往復動すべくガイドされて支持され、前記粗剃り内刃の外面に前記粗剃り内刃をボディ部側の駆動部と連結するためのガイド板が固定されると共に、前記粗剃り内刃と前記粗剃り刃ホルダとの間に該粗剃り内刃を前記粗剃り外刃に常時当接した状態で摺動可能とする板バネが介装され、前記粗剃り内刃を両側から挟み込むように、前記一対の粗剃り刃ホルダ間を連結する刃カバーが設けられていることを特徴とする。
【０００８】
また、前記粗剃り外刃の中央部分には、前記第１の歯列に沿って延びる凹溝を形成すると、平板状の粗剃り外刃の強度を向上でき、外力が加わった場合でも反りや曲がりを抑えて粗剃り内刃との密着度を維持でき、確実な髭剃りが行える。また、前記粗剃り内刃の具体例としては、断面略コ字状に金属板材を折曲して形成されると共に、前記第２の歯列は各折曲部の端縁に、互いに逆方向に折曲されて形成する構造がとりうる。また、前記第１の歯列は、その先端が同一直線上に位置するように形成するようにしてもよいし、またその先端が波状曲線上に位置するように形成する構造とすると、粗剃り刃が髭に対して斜め方向から当たる場合でも、粗剃り外刃が波状に形成されているため、いずれかの部位ではより直角に近い角度で髭を捕らえることができ、剃りあじを向上できる。
【０００９】
また、前記第１の歯列の各歯は、前記第２の歯列の各歯より長寸に形成されると共にその先端は、粗剃り内刃側に折曲されている構造とすることによって、肌に優しく当接できる。
また、粗剃り外刃は平板状であるため、前記第１の歯列の各歯を鋸歯状に容易に形成することができる。これによって髭の捕らえを良くすることができると共に、第２の歯列の各歯とそれぞれの切断面が交差する角度を任意に設定できて髭の切断能力を高めることができる。
【００１０】
また、前記粗剃り外刃の幅狭の前記両端には透孔が設けられ、前記粗剃り刃ホルダの前記挿入孔の下方には貫通孔が設けられると共に、該貫通孔の挿入孔側の内壁面であって挿入された前記粗剃り外刃の前記透孔に対応する位置には突部が形成され、前記粗剃り外刃の前記両端が前記挿入孔内に挿通された際に、前記突部を押入することで貫通孔と挿入孔との間の壁部を弾性変形させて、挿入孔側の内壁面に前記透孔に突入可能な凸状部を形成すると、粗剃り刃ホルダへの粗剃り外刃の固定を簡単に行うことが可能となる。
【００１１】
【発明の実施の形態】
以下、本発明に係る往復式電気かみそりの好適な実施の形態を添付図面に基づいて詳細に説明する。
まず、往復式電気かみそり１０の構造について図１〜図１１を用いて説明する。なお、従来例と同様の構成については同じ符号を付して、詳細な説明は省略する。
往復式電気かみそり１０には、従来例と同様に、離間して互いに平行に並設された一対の仕上げ剃り刃１２と、この仕上げ剃り刃１２の間に、この仕上げ剃り刃１２と平行となるように配された癖髭を剃るための粗剃り刃１４とが設けられている。
【００１２】
２つの仕上げ剃り刃１２は、図１に示すようにネット状の仕上げ剃り外刃１６がアーチ状に湾曲した状態で仕上げ剃り刃ホルダ１８に取り付けられ、電気かみそり１０のボディ部２０の上部に脱着自在に取り付けられる外刃ホルダ２２に装着されている。そしてボディ部２０上部の外刃ホルダ２２の装着位置には、仕上げ剃り内刃（不図示）が突設され、仕上げ剃り外刃１６が取り付けられた外刃ホルダ２２がボディ部２０上部に装着された際には、仕上げ剃り外刃１６の内面と摺接可能となる。すなわち、当接した状態で往復動可能な構成となっている。
【００１３】
続いて、本発明の特徴点である粗剃り刃１４について説明する。
粗剃り刃１４は図２に示すように平板状の粗剃り外刃２４と、断面コ字状に折曲された粗剃り内刃２６と、粗剃り外刃２４をその両端で支持する一対の粗剃り刃ホルダ２８と、粗剃り内刃２６をボディ部２０側の駆動部（不図示）と連結するためのガイド板３０と、粗剃り内刃２６とガイド板３０との間に介装される板バネ３２と、一対の粗剃り刃ホルダ２８間を連結し、上記各部材を一体に組み付ける２枚の刃カバー３４とから構成されている。
【００１４】
まず、粗剃り外刃２４について図４〜図６を用いて詳細に説明すると、粗剃り外刃２４は金属材料を用いて外形が幅狭かつ長尺（一例として幅５ｍｍ、長さ４２ｍｍ程度）な平板状に形成されている。そしてその長手方向に沿った両端側（粗剃り刃１４の両側に配される仕上げ剃り刃１２側の端部）に、第１の歯列３６が形成されている。本実施の形態では、第１の歯列３６の各歯の個々の形状は、粗剃り外歯２４の長手方向に対して直角に側方に延出する長方形に形成され、延出端部は弧状に形成されている。そして各歯は同じ長さに形成され、その先端は同一直線上に位置し、かつ各歯の先端部分は粗剃り内刃２６側に若干折曲されて肌と当接した状態での移動がスムーズに行えるように形成されている。
また、粗剃り外刃２４の長手方向の両端部分の幅は、各第１の歯列３６が形成された部分の幅より幅狭に形成され、この幅狭な部分にはそれぞれ透孔３８が設けられている。
また、粗剃り外刃２４の中央部分には、長手方向に沿って補強用の凹溝４０が形成されている。
【００１５】
次に、粗剃り内刃２６について図７〜図９を用いて詳細に説明すると、粗剃り内刃２６は金属板材を断面コ字状に折曲して形成され、当該一対の折曲部４２の各端縁には、互いに逆方向に折曲されて形成された第２の歯列４４が設けられている。第２の歯列４４は折曲部４２に対して直交するように外方に折曲されている。
この第２の歯列４４は、粗剃り外刃２４の各第１の歯列３６の内面に摺接するものであり、このため鋸歯状に形成された第２の歯列４４の各歯の折曲部分の長さＤは、第１の歯列３６の平坦部分の長さＣ未満に形成されている。
また、第２の歯列４４の各歯は、図９に示すようにその根本部分が折曲部４２にまで達するように形成されており、切断歯として第１の歯列３６と接触する領域を多くし、有効切断面長が長くなるように構成されている。
【００１６】
次に粗剃り刃ホルダ２８について図２、図３を用いて詳細に説明する。
粗剃り刃ホルダ２８は合成樹脂材料を用いて形成されており、角柱体４６と、当該角柱体４６の上部に形成され、粗剃り外刃２４の第１の歯列３６部分の幅Ｉと同じか又はそれ未満の幅Ｊに形成された偏平な頭部４８と、角柱体４６の下部から頭部４８方向に延出され、外刃ホルダ２２の係合部（不図示）と係合して粗剃り刃１４を外刃ホルダ２２に着脱自在に取り付ける係止片５０と、角柱体４６の下部であって係止片５０が延出された側壁と反対の側壁から当該側壁に対して直角に延出する支持アーム５２と、支持アーム５２の上方に支持アーム５２と離間して同一方向に延出するガイドアーム５４とを有する。
そして頭部４８には、ガイドアーム５４の上面に開口する挿入孔５６が形成されている。この挿入孔５６の内壁面の断面形状は、粗剃り外刃２４の幅狭部分の断面外形形状と略同寸に形成されており、粗剃り外刃２４の幅狭部分が挿入可能となっている。
このように、粗剃り外刃２４の両端を幅狭に形成することによって、当該幅狭部分を保持する粗剃り刃ホルダ２８の幅Ｊを粗剃り外刃２４の最大幅（通常は第１の歯列３６の各歯の有効切断面長をなるべく多くしようとするため、最大幅は第１の歯列３６部分となる）Ｉより短くすることができる。よって粗剃り刃１４全体の幅は粗剃り外刃２４の幅より幅狭に形成できるため、仕上げ剃り刃１２を含めた全体の大きさをコンパクトにすることが可能となる。
【００１７】
また、ガイドアーム５４が延出する側壁と接する２つの側壁の頭部４８直下には、当該２つの側壁に開口する貫通孔５８が形成され、当該貫通孔５８の頭部４８側の内壁面には突部６０が形成されている。突部６０が形成されている位置は、挿入孔５６に挿入される粗剃り外刃２４の幅狭部分に形成された透孔３８の位置に対応する位置になっている。
また、ガイドアーム５４は直方体に形成されると共に、その厚さＥは、断面コ字状に形成された粗剃り内刃２６の一対の折曲部４２の間隔Ｆと略同寸に形成されている。
また、支持アーム５２も同様に略直方体に形成されると共に、厚み方向の両壁面には、刃カバー３４が連結されるための柱状突起６２が設けられている。
【００１８】
次に刃カバー３４の構成について図２を用いて説明すると、刃カバー３４の長手方向の両端部には凹部６４が形成されると共に、この凹部６４の奥部には支持アーム５２の柱状突起６２が挿入可能な固定孔６６が設けられている。また、刃カバー３４には、一対の凹部６４にわたるように補強用のリブ６８が形成されている。
【００１９】
続いて、粗剃り刃１４の組み立て構造について図２、図３、図１０を用いて説明する。
まず、粗剃り内刃２６の一対の折曲部４２を接続している連絡部７０の外面に、屈曲された板バネ３２をその両端が連絡部７０の外面から離間し、かつ中央部分が連絡部７０外面に当接する状態で配置する。そして板バネ３２側から合成樹脂製のガイド板３０を連絡部７０に、板バネ３２を介装した状態で固定する（図１０参照）。これにより、粗剃り内刃２６と板バネ３２とガイド板３０とが一体に組み立てられて、粗剃り内刃アセンブリ７２となる。
次に、粗剃り外刃２４の一方の端部に、当該端部の幅狭部分を粗剃り刃ホルダ２８の挿入孔５６内に挿入して粗剃り刃ホルダ２８を取り付ける。
【００２０】
続いて、粗剃り内刃アセンブリ７２を、粗剃り外刃２４が取り付けられた粗剃り刃ホルダ２８に、ガイドアーム５４が粗剃り内刃２６の一対の折曲部４２間に位置し、かつ板バネ３２の端部が支持アーム５２とガイドアーム５４との間に位置するように装着する。
その後、粗剃り外刃２４の他方の端部に、当該端部の幅狭部分を挿入孔５６に挿入して一方の端部と同様に粗剃り刃ホルダ２８を取り付ける。なお、この際には、やはり一方の端部と同様にガイドアーム５４が粗剃り内刃２６の一対の折曲部４２間に位置し、かつ板バネ３２の端部が支持アーム５２とガイドアーム５４との間に位置するように装着する。
【００２１】
次に、粗剃り内刃２６を挟み込むように、粗剃り刃ホルダ２８の両側から刃カバー３４を、その固定孔６６に支持アーム５２の柱状突起６２を挿入して取り付け、柱状突起６２を加熱して潰し、固定する。これにより、一対の粗剃り刃ホルダ２８が刃カバー３４を介して連結される。なお、刃カバー３４の粗剃り内刃２６側の端縁形状は直線的に形成され、第２の歯列４４との間には若干の隙間が生じている。
最後に、粗剃り刃ホルダ２８の貫通孔５８内の突部６０を挿入孔５６方向に押入して、組み立てが完了する。突部６０を挿入孔５６方向に押入することより、貫通孔５８と挿入孔５６との間の壁部が挿入孔５６側に弾性変形し、挿入孔５６側の内壁面に粗剃り外刃２４の透孔３８に突入する凸状部（不図示）が形成され、粗剃り刃ホルダ２８からの粗剃り外刃２４の抜脱が防止できる。
このようにして組み立てられた粗剃り刃１４では、粗剃り内刃２６は、一対の折曲部４２がガイドアーム５４の側面と当接してガイドされた状態で、長手方向に往復動する。また粗剃り内刃２６は、支持アーム５２の粗剃り外刃２４側の面と当接して粗剃り内刃アセンブリ７２全体を粗剃り外刃２４方向に付勢する板バネ３２によって粗剃り外刃２４の内面と常時当接した状態で摺動可能となる。
【００２２】
また、上述した実施の形態では、第１の歯列３６の各歯先の先端は同一直線上に位置するように構成されていたが、図１１に示すように先端が波状曲線上に位置するように第１の歯列３６の各歯の長さを変えるようにしてもよい。この構成とすることによって、肌に対して粗剃り刃１４を斜めに移動させるような場合でも、第１の歯列３６と癖髭とが、より直角に近い角度で当接する部位を確保できるめに一層確実な髭剃りが可能となる。
また、粗剃り外刃２４は平板状であるため、第１の歯列３６の各歯の形状を鋸歯状（第２の歯列４４の各歯と同様の平面形状が略三角形となる形状をいう）に容易に形成することができる。これによって、髭を捕らえる範囲が広くなり、良好な髭の取り込みが行える。また、第１の歯列３６の各歯の切断面と第２の歯列４４の各歯の切断面との交差角度を任意に設定することができるので、最も髭の切断能力が高くなる交差角度とすることができる。
【００２３】
以上、本発明の好適な実施の形態について種々述べてきたが、本発明は上述する実施の形態に限定されるものではなく、発明の精神を逸脱しない範囲で多くの改変を施し得るのはもちろんである。
【００２４】
【発明の効果】
本発明に係る往復式電気かみそりを用いると、癖髭の粗剃り刃への取り込みは、従来のようにスリットの開口幅や長さに制限されることがなくなり、大きく曲がっていたり、また寝ていたりする癖髭を効率よく剃ることが可能となる。また、粗剃り外刃の構造も平板状であるため、製造も容易にでき、コスト削減が可能となるという著効を奏する。
【図面の簡単な説明】
【図１】本発明に係る往復式電気かみそりの一実施形態の構成を説明するための、要部斜視図である。
【図２】図１の粗剃り刃の組み立て分解正面図である。
【図３】図１の粗剃り刃の粗剃り刃ホルダ、粗剃り外刃、粗剃り内刃の構造を示す要部斜視図である。
【図４】図１の粗剃り外刃の構造を示す平面図である。
【図５】図１の粗剃り外刃の構造を示す正面図である。
【図６】図４のＡ−Ａ断面図である。
【図７】図１の粗剃り内刃の構造を示す平面図である。
【図８】図１の粗剃り内刃の構造を示す正面図である。
【図９】図４のＢ−Ｂ断面図である。
【図１０】図１の粗剃り内刃アセンブリの組み立て構造と、粗剃り内刃アセンブリと粗剃り外刃との当接状態を示す要部断面図である。
【図１１】粗剃り外刃の他の実施の形態を示す平面図である。
【図１２】従来の往復式電気かみそりのヘッド部分の構造を示す要部断面図である。
【図１３】図１２の粗剃り外刃の構造を示す斜視図である。
【図１４】図１２の粗剃り内刃の構造を示す斜視図である。
【図１５】図１２の粗剃り刃が癖髭を剃る際の状態を説明する説明図である。
【符号の説明】
１０往復式電気かみそり
１２仕上げ剃り刃
１４粗剃り刃
２４粗剃り外刃
２６粗剃り内刃
３６第１の歯列
４４第２の歯列[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reciprocating electric shaver, and more particularly to a reciprocating electric shaver in which a rough shaving blade is disposed between a pair of finish shaving blades arranged side by side.
[0002]
[Prior art]
A conventional reciprocating electric shaver will be described with reference to FIGS.
The reciprocating electric razor 100 is provided with a rough shave blade 104 for shaving a beard so as to be parallel to the finish shave blade 102 between a pair of finish shave blades 102 arranged in parallel and spaced apart from each other. Yes.
As shown in FIG. 12, the two finish shave blades 102 are attached to a finish shave blade holder (not shown) with the net-like finish shave outer blade 106 curved in an arch shape. It is attached to an outer blade holder 108 which is detachably attached to the upper part of the figure. Note that the finish shaving inner blade (not shown) protrudes from the upper portion of the body portion so as to be reciprocally movable, and comes into contact with the inner surface of the finish shaving outer blade 106 when the outer blade holder 108 is mounted on the body portion.
[0003]
Further, as shown in FIG. 12, the rough shaving blade 104 includes a rough shaving outer blade 110 and a rough shaving inner blade 112.
As shown in FIG. 13, the rough shaving outer blade 110 is formed by bending a thin metal plate into a U-shaped cross section, and a first connecting portion 116 that connects between the pair of first bent portions 114. A plurality of first slits 118 having a predetermined width that enter both the first bent portions 114 are provided in the longitudinal direction of the rough shaving outer blade 110 at regular intervals. Each first slit 118 is formed in a direction orthogonal to the longitudinal direction of the rough shaving outer blade 110.
Similarly to the rough shaving outer blade 110, the rough shaving inner blade 112 is formed by bending a thin metal plate into a U-shaped cross section as shown in FIG. 14, and between the pair of second bent portions 120. A plurality of second slits 124 having a predetermined width that enter both the second bent portions 120 are provided in the longitudinal direction of the rough shaving inner blade 112 in the second connecting portion 122 that communicates with each other. ing. Each second slit 124 is formed in a direction perpendicular to the longitudinal direction of the rough shaving inner blade 112.
[0004]
And the space | interval between the 2nd bending parts 120 of the rough shaving inner blade 112 is formed a little narrower than the space | interval between the 1st bending parts 114 of the rough shaving outer blade 110, and the rough shaving inner blade 112 has a structure in which the second connecting portion 122 is mounted in the rough shaving outer blade 110 in a state of contacting the first connecting portion 116 as shown in FIG.
As a result, the rough shaving inner blade 112 reciprocates so that the scissors captured between the slits 118 and 124 of the rough shaving outer blade 110 and the rough shaving inner blade 112 can be shaved.
[0005]
[Problems to be solved by the invention]
However, the conventional reciprocating electric razor has the following problems.
The electric razor is usually used in such a manner that the two finishing shave blades 102 are in contact with the skin 126 at the same time. For this reason, the rough shaving blade 104 is used in a state where the first connecting portion 116 of the rough shaving outer blade 110 is in close contact with the skin 126, and most of the wrinkles protruding from the skin 126 are shown in FIG. As shown, it is taken in from the first slit 118 portion opened in the first bent portion 114 instead of the first connecting portion 116 of the rough shave outer blade 110 (see the scissors 128a in FIG. 15). ).
However, as shown in FIG. 15, there are various types of scissors, especially those that are bent larger than the opening width G of the first slit 118 or are sleeping (128b and 128c in FIG. 15), The length (128d) longer than the length H of the first slit 118 in the first bent portion 114 is naturally not taken into the first slit 118 and cannot be shaved. However, the opening width G of the first slit 118 cannot be increased beyond a certain width in consideration of safety such that the skin 126 itself is not cut, and the length H is also shaved. Considering the strength of the outer blade 110, there is a limit, and there is a problem that it cannot be made longer than a certain length.
[0006]
Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a reciprocating electric shaver that can be surely shaved even if it is bent greatly or is sleeping. .
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises the following arrangement.
That is, in a reciprocating electric razor in which a rough shave blade is arranged between a pair of spaced apart finish shave blades, the rough shave blade is formed in a long flat plate shape, A rough shave outer blade having a first dentition formed on both ends of the finish shave blade side, and a reciprocating motion along the longitudinal direction of the rough shave outer blade are arranged inside the rough shave outer blade. And a rough shaving inner blade formed in a U-shaped cross section having a pair of second tooth rows that are in sliding contact with the inner surface of each first tooth row, and an insertion having the same width as both ends of the rough shaving outer blade A hole is provided in the head, and includes a pair of rough shave blade holders attached to both ends of the rough shave outer blade by inserting both ends of the rough shave outer blade into the insertion hole, The rough shave outer blade extends from the rough shave blade holder to a guide arm that extends parallel to the longitudinal direction of the rough shave outer blade. A guide plate for connecting the rough shaving inner blade to the body side drive unit is fixed to the outer surface of the rough shaving inner blade, and is guided and supported so as to reciprocate in parallel with the longitudinal direction. A leaf spring is provided between the inner shaving blade and the rough shaving blade holder so as to be slidable while the inner shaving blade is always in contact with the outer shaving outer blade. A blade cover that connects the pair of rough shave blade holders is provided so as to be sandwiched between the two.
[0008]
Further, when a concave groove extending along the first dentition is formed in the central portion of the rough shaving outer blade, the strength of the flat rough shaving outer blade can be improved, and even when an external force is applied, warpage and Suppresses bending and maintains close contact with the inner edge of the rough shave, enabling reliable shaving. In addition, as a specific example of the rough shaving inner blade, a metal plate material is bent in a substantially U-shaped cross section, and the second tooth row is opposite to each other at the edge of each bent portion. It is possible to take a structure that is bent to form. Further, the first tooth row may be formed so that the tip thereof is located on the same straight line, or when the tip is arranged so that the tip is located on a wavy curve, Even when the blade hits the heel from an oblique direction, since the rough shave outer blade is formed in a wave shape, the heel can be caught at an angle closer to a right angle at any part, and the shaving can be improved.
[0009]
Further, each tooth of the first dentition is formed to be longer than each tooth of the second dentition, and its tip is bent to the rough shaving inner blade side. Can touch the skin gently.
Moreover, since the rough shaving outer blade has a flat plate shape, each tooth of the first tooth row can be easily formed in a sawtooth shape. This makes it possible to improve catching of wrinkles and to arbitrarily set the angle at which each tooth of the second dentition intersects each cutting surface, thereby enhancing the ability to cut the wrinkles .
[0010]
In addition, a through hole is provided at each of the narrow ends of the rough shaving outer blade, a through hole is provided below the insertion hole of the rough shaving blade holder, and an inner side of the through hole on the insertion hole side is provided. A protrusion is formed at a position corresponding to the through hole of the rough shaving outer blade that is inserted into the wall surface, and when the both ends of the rough shaving outer blade are inserted into the insertion hole, the protrusion When the wall portion between the through hole and the insertion hole is elastically deformed by pressing the portion to form a convex portion that can be inserted into the through hole on the inner wall surface on the insertion hole side, It is possible to easily fix the rough shaving outer blade.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a reciprocating electric shaver according to the present invention will be described in detail with reference to the accompanying drawings.
First, the structure of the reciprocating electric shaver 10 will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the structure similar to a prior art example, and detailed description is abbreviate | omitted.
The reciprocating electric razor 10 is parallel to the finishing shave blade 12 between a pair of finishing shave blades 12 that are spaced apart and arranged in parallel with each other, as in the conventional example. A rough shave blade 14 is provided for shaving the scissors arranged in this manner.
[0012]
As shown in FIG. 1, the two finishing shave blades 12 are attached to the finishing shave blade holder 18 with the net-like finishing shave outer blade 16 curved in an arch shape, and are attached to and detached from the upper part of the body portion 20 of the electric razor 10. It is mounted on an outer blade holder 22 that can be freely attached. A finish shaving inner blade (not shown) protrudes from the mounting position of the outer blade holder 22 on the upper portion of the body portion 20, and the outer blade holder 22 to which the finishing shaving outer blade 16 is attached is mounted on the upper portion of the body portion 20. In this case, it is possible to make sliding contact with the inner surface of the finish shaving outer blade 16. That is, it is configured to be able to reciprocate in the contacted state.
[0013]
Next, the rough shave blade 14 that is a feature of the present invention will be described.
As shown in FIG. 2, the rough shaving blade 14 includes a pair of flat rough shaving outer blades 24, a rough shaving inner blade 26 bent in a U-shaped cross section, and a pair of rough shaving outer blades 24 that support the rough shaving outer blade 24 at both ends thereof. A rough shaving blade holder 28, a guide plate 30 for connecting the rough shaving inner blade 26 to a drive unit (not shown) on the body 20 side, and an intermediate between the rough shaving inner blade 26 and the guide plate 30. The plate spring 32 and the pair of rough shaving blade holders 28 are connected to each other, and two blade covers 34 for assembling the above-mentioned members together.
[0014]
First, the rough shaving outer blade 24 will be described in detail with reference to FIGS. 4 to 6. The rough shaving outer blade 24 uses a metal material and has a narrow and long outer shape (for example, a width of about 5 mm and a length of about 42 mm). It is formed in a flat plate shape. And the 1st tooth row 36 is formed in the both ends side (the end part by the side of the finishing shaving blade 12 distribute | arranged to the both sides of the rough shaving blade 14) along the longitudinal direction. In the present embodiment, the individual shape of each tooth of the first tooth row 36 is formed in a rectangular shape extending laterally at right angles to the longitudinal direction of the shave external teeth 24, and the extended end portion is It is formed in an arc shape. Each tooth is formed to have the same length, its tip is located on the same straight line, and the tip of each tooth is bent slightly toward the rough shaving inner blade 26 and moves in a state of contacting the skin. It is formed so that it can be performed smoothly.
Further, the width of both end portions in the longitudinal direction of the rough shaving outer blade 24 is formed narrower than the width of the portion where each first tooth row 36 is formed, and through holes 38 are formed in the narrow portions. Is provided.
Further, a reinforcing concave groove 40 is formed in the central portion of the rough shaving outer blade 24 along the longitudinal direction.
[0015]
Next, the rough shaving inner blade 26 will be described in detail with reference to FIGS. 7 to 9. The rough shaving inner blade 26 is formed by bending a metal plate into a U-shaped cross section, and the pair of bent portions 42. A second tooth row 44 formed by bending in opposite directions is provided at each end edge. The second tooth row 44 is bent outward so as to be orthogonal to the bent portion 42.
The second tooth row 44 is in sliding contact with the inner surface of each first tooth row 36 of the rough shaving outer blade 24. For this reason, each tooth of the second tooth row 44 formed in a sawtooth shape is folded. The length D of the curved portion is formed to be less than the length C of the flat portion of the first tooth row 36.
Further, each tooth of the second tooth row 44 is formed so that the root portion thereof reaches the bent portion 42 as shown in FIG. 9, and is an area that contacts the first tooth row 36 as a cutting tooth. The effective cutting surface length is increased.
[0016]
Next, the rough shaving blade holder 28 will be described in detail with reference to FIGS.
The rough shaving blade holder 28 is formed using a synthetic resin material, and is formed on the prism body 46 and the upper portion of the prism body 46, and has the same width I as the first tooth row 36 portion of the rough shaving outer blade 24. A flat head 48 formed with a width J of less than or less than that, and extending from the lower part of the prism body 46 toward the head 48 and engaging with an engaging portion (not shown) of the outer blade holder 22. A locking piece 50 for detachably attaching the rough shave blade 14 to the outer blade holder 22 and a side wall opposite to the side wall at the lower part of the prism body 46 and extending from the locking piece 50 at right angles to the side wall. A support arm 52 that extends, and a guide arm 54 that extends away from the support arm 52 and extends in the same direction above the support arm 52.
The head 48 is formed with an insertion hole 56 that opens to the upper surface of the guide arm 54. The cross-sectional shape of the inner wall surface of the insertion hole 56 is substantially the same as the cross-sectional outer shape of the narrow portion of the rough shaving outer blade 24, and the narrow portion of the rough shaving outer blade 24 can be inserted. Yes.
Thus, by forming both ends of the rough shaving outer blade 24 narrowly, the width J of the rough shaving blade holder 28 that holds the narrow portion is set to the maximum width (usually the first width of the rough shaving outer blade 24). In order to increase the effective cutting surface length of each tooth of the tooth row 36 as much as possible, the maximum width can be made shorter than I (which becomes the first tooth row 36 portion). Therefore, since the entire width of the rough shaving blade 14 can be formed narrower than the width of the rough shaving outer blade 24, the entire size including the finishing shaving blade 12 can be made compact.
[0017]
Further, a through hole 58 that opens to the two side walls is formed immediately below the heads 48 of the two side walls that contact the side wall from which the guide arm 54 extends, and is formed on the inner wall surface of the through hole 58 on the head 48 side. A protrusion 60 is formed. The position where the protrusion 60 is formed is a position corresponding to the position of the through hole 38 formed in the narrow portion of the rough shaving outer blade 24 inserted into the insertion hole 56.
Further, the guide arm 54 is formed in a rectangular parallelepiped shape, and the thickness E thereof is formed to be approximately the same as the interval F between the pair of bent portions 42 of the rough shaving inner blade 26 formed in a U-shaped cross section. Yes.
Similarly, the support arm 52 is formed in a substantially rectangular parallelepiped shape, and columnar protrusions 62 for connecting the blade cover 34 are provided on both wall surfaces in the thickness direction.
[0018]
Next, the configuration of the blade cover 34 will be described with reference to FIG. 2. Concave portions 64 are formed at both ends in the longitudinal direction of the blade cover 34, and columnar protrusions 62 of the support arm 52 are formed at the back of the concave portion 64. A fixing hole 66 into which can be inserted is provided. The blade cover 34 is formed with reinforcing ribs 68 so as to extend across the pair of recesses 64.
[0019]
Then, the assembly structure of the rough shaving blade 14 is demonstrated using FIG.2, FIG.3, FIG.10.
First, the bent leaf spring 32 is separated from the outer surface of the connecting portion 70 on the outer surface of the connecting portion 70 connecting the pair of bent portions 42 of the rough shaving inner blade 26, and the central portion is connected. It arrange | positions in the state contact | abutted on the part 70 outer surface. Then, the synthetic resin guide plate 30 is fixed to the connecting portion 70 from the leaf spring 32 side with the leaf spring 32 interposed (see FIG. 10). Thereby, the rough shaving inner blade 26, the leaf spring 32, and the guide plate 30 are assembled together to form the rough shaving inner blade assembly 72.
Next, the rough shaving blade holder 28 is attached to one end portion of the rough shaving outer blade 24 by inserting the narrow portion of the end portion into the insertion hole 56 of the rough shaving blade holder 28.
[0020]
Subsequently, the rough shaving inner blade assembly 72 is positioned on the rough shaving blade holder 28 to which the rough shaving outer blade 24 is attached, the guide arm 54 is positioned between the pair of bent portions 42 of the rough shaving inner blade 26, and the plate The spring 32 is mounted so that the end portion is positioned between the support arm 52 and the guide arm 54.
Thereafter, the narrow portion of the end portion is inserted into the insertion hole 56 at the other end portion of the rough shaving outer blade 24, and the rough shaving blade holder 28 is attached in the same manner as one end portion. At this time, the guide arm 54 is positioned between the pair of bent portions 42 of the rough shaving 26 and the end portion of the leaf spring 32 is connected to the support arm 52 and the guide arm as in the case of one end portion. 54 so as to be positioned between the two.
[0021]
Next, the blade cover 34 is attached from both sides of the rough shaving blade holder 28 so as to sandwich the rough shaving inner blade 26, and the columnar protrusions 62 of the support arm 52 are inserted into the fixing holes 66, and the columnar protrusions 62 are heated. Crush and fix. As a result, the pair of rough shaving blade holders 28 are connected via the blade cover 34. Note that the edge shape of the blade cover 34 on the rough shaving inner blade 26 side is formed linearly, and a slight gap is generated between the blade cover 34 and the second tooth row 44.
Finally, the protrusion 60 in the through hole 58 of the rough shave blade holder 28 is pushed in the direction of the insertion hole 56, and the assembly is completed. By pushing the protrusion 60 in the direction of the insertion hole 56, the wall portion between the through hole 58 and the insertion hole 56 is elastically deformed toward the insertion hole 56, and the shave outer blade 24 is formed on the inner wall surface on the insertion hole 56 side. A convex portion (not shown) that enters the through-hole 38 is formed, so that the rough shaving outer blade 24 can be prevented from being detached from the rough shaving blade holder 28.
In the rough shaving blade 14 thus assembled, the rough shaving inner blade 26 reciprocates in the longitudinal direction in a state where the pair of bent portions 42 are guided in contact with the side surfaces of the guide arm 54. The rough shaving inner blade 26 is in contact with the surface of the support arm 52 on the rough shaving outer blade 24 side, and the rough shaving inner blade assembly 72 is urged in the direction of the rough shaving outer blade 24 by the plate spring 32 that biases the entire rough shaving inner blade assembly 72. It is possible to slide in a state where it is always in contact with the inner surface of 24.
[0022]
In the above-described embodiment, the tip of each tooth tip of the first tooth row 36 is configured to be positioned on the same straight line, but the tip is positioned on a wavy curve as shown in FIG. In this way, the length of each tooth of the first tooth row 36 may be changed. With this configuration, even when the rough shaving blade 14 is moved obliquely with respect to the skin, it is possible to secure a portion where the first tooth row 36 and the heel come into contact at an angle closer to a right angle. More reliable shaving.
Further, since the rough shaving outer blade 24 has a flat plate shape, each tooth of the first tooth row 36 has a sawtooth shape (a shape in which the planar shape similar to each tooth of the second tooth row 44 is substantially triangular). Can be easily formed. As a result, the range for catching soot is widened and good soot can be taken in. In addition, since the crossing angle between the cutting surfaces of the teeth of the first tooth row 36 and the cutting surfaces of the teeth of the second tooth row 44 can be arbitrarily set, the crossing with the highest cutting ability of the eyelids is possible. It can be an angle.
[0023]
The preferred embodiments of the present invention have been described above in various ways. However, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.
[0024]
【The invention's effect】
When the reciprocating electric razor according to the present invention is used, the taking-in of the scissors into the rough shaving blade is not limited by the opening width and length of the slit as in the prior art, and it is greatly bent or slept. It is possible to efficiently shave the heels. Moreover, since the structure of the rough shaving outer blade is flat, the manufacturing can be facilitated and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of an essential part for explaining the configuration of an embodiment of a reciprocating electric shaver according to the present invention.
2 is an exploded front view of the rough shave blade of FIG. 1; FIG.
3 is a perspective view of a main part showing a structure of a rough shaving blade holder, a rough shaving outer blade, and a rough shaving inner blade of the rough shaving blade of FIG. 1. FIG.
4 is a plan view showing the structure of the rough shaving outer blade of FIG. 1. FIG.
5 is a front view showing the structure of the rough shaving outer blade of FIG. 1. FIG.
6 is a cross-sectional view taken along the line AA in FIG.
7 is a plan view showing the structure of the rough shaving inner blade of FIG. 1. FIG.
8 is a front view showing the structure of the rough shaving inner blade of FIG. 1; FIG.
9 is a cross-sectional view taken along the line BB in FIG.
10 is a cross-sectional view of the main part showing the assembly structure of the rough shaving inner blade assembly of FIG. 1 and the contact state between the rough shaving inner blade assembly and the rough shaving outer blade. FIG.
FIG. 11 is a plan view showing another embodiment of a rough shaving outer blade.
FIG. 12 is a cross-sectional view of the main part showing the structure of the head portion of a conventional reciprocating electric shaver.
13 is a perspective view showing the structure of the rough shaving outer blade of FIG. 12. FIG.
14 is a perspective view showing the structure of the rough shaving inner blade in FIG. 12. FIG.
15 is an explanatory diagram for explaining a state when the rough shave blade of FIG. 12 shaves a beard.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Reciprocating electric shaver 12 Finishing shaving blade 14 Rough shaving blade 24 Rough shaving outer blade 26 Rough shaving inner blade 36 1st tooth row 44 2nd tooth row

Claims

In a reciprocating electric razor in which a rough shave blade is arranged between a pair of finished shave blades arranged side by side,
The rough shave blade is
A rough shave outer blade that is formed in a long flat plate shape and has first teeth arranged on both end sides of each finish shave blade side,
A pair of second tooth rows are arranged inside the rough shaving outer blade so as to be capable of reciprocating along the longitudinal direction of the rough shaving outer blade, and are in sliding contact with the inner surfaces of the first tooth rows. A rough shaving inner blade formed in a U-shaped cross-section ;
Insertion holes having the same width as both ends of the rough shaving outer blade are provided in the head, and a pair of rough shavings attached to both ends of the rough shaving outer blade by inserting both ends of the rough shaving outer blade into the insertion hole. A blade holder,
The inner razor blade is guided and supported by a guide arm that extends from the razor blade holder in parallel with the longitudinal direction of the outer razor blade so as to reciprocate in parallel with the longitudinal direction of the outer razor blade. And
A guide plate for connecting the rough shaving inner blade to the drive unit on the body portion side is fixed to the outer surface of the rough shaving inner blade, and the rough shaving blade holder is connected between the rough shaving inner blade and the rough shaving blade holder. A leaf spring that allows the inner blade to slide in a state in which the inner blade is always in contact with the outer blade for shaving is interposed,
A reciprocating electric shaver characterized in that a blade cover for connecting the pair of rough shaving blade holders is provided so as to sandwich the rough shaving inner blade from both sides .

The reciprocating electric shaver according to claim 1, wherein a concave groove extending along the first tooth row is formed in a central portion of the rough shaving outer blade.

Characterized in that said coarse shaving the blades with metallic sheet is formed by bending, the second tooth row of the end edge of each bent portion is formed is bent in opposite directions The reciprocating electric shaver according to claim 1 or 2.

The reciprocating electric shaver according to claim 1, 2 or 3, wherein the first tooth row is formed so that the tips thereof are located on the same straight line.

The reciprocating electric shaver according to claim 1, 2, or 3, wherein the first tooth row is formed so that a tip thereof is located on a wavy curve.

Each tooth of the first dentition is formed to be longer than each tooth of the second dentition, and its tip is bent toward the rough shaving inner blade side. A reciprocating electric shaver according to 1, 2, 3, 4 or 5.

The reciprocating electric shaver according to claim 1, 2, 3, 4, 5, or 6, wherein each tooth of the first dentition is formed in a sawtooth shape.

Through holes are provided at both ends of the rough shaving outer blade,
A through hole is provided below the insertion hole of the rough shave blade holder, and is an inner wall surface of the through hole on the insertion hole side at a position corresponding to the through hole of the inserted rough shave blade. Has a protrusion,
When the both ends of the rough shaving outer blade are inserted into the insertion hole, the wall portion between the through hole and the insertion hole is elastically deformed by pushing the protrusion, so that the inner portion on the insertion hole side is 8. The reciprocating electric shaver according to claim 1, wherein a convex portion that can enter the through hole is formed on a wall surface .