JP4569985B2

JP4569985B2 - Electric razor

Info

Publication number: JP4569985B2
Application number: JP2000009130A
Authority: JP
Inventors: 栄之助藤村; 康雄山下
Original assignee: Kyushu Hitachi Maxell Ltd
Current assignee: Maxell Ltd
Priority date: 2000-01-18
Filing date: 2000-01-18
Publication date: 2010-10-27
Anticipated expiration: 2020-01-18
Also published as: JP2001198366A

Description

【０００１】
【発明の属する技術分野】
本発明は、前後一対の内刃がそれぞれ専用の外刃を備えて平行に配置された電気かみそりに関し、各外刃の穿孔パターンに改良を加えたものである。
【０００２】
【従来の技術】
特開平５−３１７５３６号公報では、本体ケースの上部にロータリ内刃と起毛用回転体とを前後に並べて互いに反対方向に回転駆動可能に支持する。そしてロータリ内刃にアーチ状に湾曲した外刃を摺接させ、起毛用回転体に同じくアーチ状に湾曲した長毛・くせ毛導入板を摺接させる。外刃におけるロータリ内刃との摺接領域には、孔径の小さい本来の毛導入孔群を設けるとともに、長毛やくせ毛を導入するための長孔状の導入孔群を設ける。一方、長毛・くせ毛導入板にも、長毛やくせ毛を導入するための長孔状の導入孔群を設けたものとなっている。そこでは、ひとつの外刃に、孔径や形状の異なる導入孔群が隣接配置された穿孔パターンを採用している点が評価できる。
【０００３】
【発明が解決しようとする課題】
上記の従来例では、起毛用回転体と長毛・くせ毛導入板とで、予め長毛やくせ毛を確実に捕捉して起こしたのち本来の外刃に導入し、該外刃と内刃との協働で円滑に切断できる。
【０００４】
しかし、そこでの内刃と起毛用回転体とは、折角、前後に並べて回転駆動する形態でありながら、起毛用回転体が髭の切断用に寄与しておらず、長毛やくせ毛を含めて効率良く切断するのに片手持ちを否めず、この点になお改善の余地があった。
【０００５】
そこで本発明の目的は、前後に備えた一対の内刃と、各内刃にそれぞれ摺接する２枚の外刃とでそれぞれ髭の切断を行うに際し、２枚の外刃の穿孔パターンに改良を加えることにより、髭そり機能が飛躍的に向上する電気かみそりを提供するにある。
【０００６】
【課題を解決するための手段】
本発明は、図１に示すごとく本体ケース１の上部に、左右方向に延在して駆動される前後一対の第１内刃２と第２内刃３とが平行に支持されており、各内刃２・３にそれぞれ摺接するよう断面アーチ形に装着される第１・第２外刃７・８を備えている電気かみそりにおいて、第１外刃７における第１内刃２との内刃摺接部分１３には、図２および図４に示すごとく前後方向に長い多数の長孔１５が形成された長孔群領域Ｃを有し、第２外刃８における第２内刃３との内刃摺接部分２１には、図３および図６に示すごとく前記長孔１５よりも前後方向長さの短い多数の短孔２２が形成された短孔群領域Ｇが形成されており、電鋳製の第１外刃７の長孔群領域Ｃは、内刃摺接部分１３の中央側の実効切断領域１３ａにある第１長孔群領域部分Ｃ ₁ と、これに連続してつながり実効切断領域１３ａから外れた第２長孔群領域部分Ｃ ₂ とを含み、第１長孔群領域部分Ｃ ₁ と第２長孔群領域部分Ｃ ₂ とは、同一形状・同一パターンで形成されており、第１長孔群領域部分Ｃ ₁ が、第２長孔群領域部分Ｃ ₂ よりも厚肉に形成されており、第２長孔群領域部分Ｃ ₂ の一部が、内刃摺接部分１３にオーバーラップしていることを特徴とする。
【０００７】
更に具体的には、第１外刃７の内刃摺接部分１３に、図４に示すごとく長孔群領域Ｃに隣接して、前後方向に延びる多数のスリット１６が形成されたスリット群領域Ｂを有する。また、第２外刃８の内刃摺接部分２１には、図６に示すごとく短孔群領域Ｇに隣接して、前後方向に長く延びる多数のスリット２３が形成されたスリット群領域Ｆを有する。これらのスリット群領域Ｂ・Ｆは、各々の内刃摺接部分１３・２１において前後方向のいずれか一端側に位置していることが望ましい。
【０００８】
また、電鋳製の第２外刃８の短孔群領域Ｇは、第１外刃７の第１長孔群領域部分Ｃ₁ よりも薄肉に形成されている。
【０００９】
【作用効果】
第１外刃７の長孔群領域Ｃでは、前後方向に長い各長孔１５の開口面積が大きいので、長毛を誘い込みやすく長毛の切断に有効である。第２外刃８の短孔群領域Ｇでは、前記長孔１５との比較においてこれよりも前後方向長さの短い短孔２２で短毛を深剃りできる。従って本発明によれば、両外刃７・８を皮ふに押し当てて前後に動かせば、独立して異なる機能を持つ２枚の外刃７・８とこれに対応する内刃２・３とで長毛も含めて短時間で効率よく髭剃りを行える。
【００１０】
第１外刃７の内刃摺接領域１３には、先の長孔群領域Ｃに隣接してスリット群領域Ｂが設けてあり、その各スリット１６の前後方向長さは前記長孔１５のそれよりも大きい。従って、該スリット１６に長毛やくせ毛を導入してこれが左右方向にブレないよう起こす働きをし、長毛やくせ毛はスリット群領域Ｂで一部を切断しながら、続いて長孔１５に誘い込んで確実に切断できるものとなる。
【００１１】
第２外刃８の内刃摺接部分２１にも、短孔群領域Ｇに隣接してスリット群領域Ｆが形成されていると、そこでのスリット２３を介して長毛を短孔２２に誘い込むに有利となる。
【００１２】
第１外刃７および第２外刃８において、これを電鋳で成形するときは、穿孔パターンの各領域の肉厚を機能に応じて大小の所望値に容易に調整できる。すなわち、電鋳による外刃形成においては、単位面積当たりの電着量は同一になるので、平面視で電着部分（無孔部分）が多いほど、該当領域の肉厚は薄くなる。例えば、後述するベタ部分１２・２０が極薄化するのは、上記の理由による。その電鋳時に、例えばスリット１６・２３、長孔１５、短孔２２の中央部には捨て電着部を一次電着したのち二次電着すれば、該当領域の肉厚を容易に調整できる。
【００１３】
しかるに、本発明によれば、電鋳製の第１外刃７の長孔群領域Ｃは、内刃摺接部分１３の中央側の実効切断領域１３ａにある第１長孔群領域部分Ｃ₁ と、これに連続してつながり実効切断領域１３ａから外れた第２長孔群領域部分Ｃ₂ とを含み、第１長孔群領域部分Ｃ₁ が、第２長孔群領域部分Ｃ₂ およびスリット群領域Ｂよりも厚肉に形成されている。従って、各長孔１５の開口面積が大きいと、長毛の導入には有利であるが、皮ふに強く押し当てたときに皮ふが長孔１５内に入り込んで傷つきやすいところ、第１外刃７の第１長孔群領域部分Ｃ₁ を厚肉に形成してあるので、皮ふの傷付きをよく防止できる。このことは、長孔群領域Ｃが髭の深剃りに利かないことを意味する。
【００１４】
この点、電鋳製の第２外刃８の短孔群領域Ｇは、第１外刃７の第１長孔群領域部分Ｃ₁ よりも薄肉に形成されているので、第２外刃８側を皮ふに強く押し当てれば、短孔群領域Ｇの短孔２２で前記長孔１５による不足を補って髭を確実に深剃りすることができる。その際に、短孔２２は文字通り開口面積が小さいので、これに皮ふが入り込んで傷付けられることはない。このようにユーザーは、皮ふに対して第１外刃７と第２外刃８とのいずれかを選択的に強弱を以て押し当てることにより、深剃りにしたり浅剃りにしたりすることが可能となる。
【００１５】
実効切断領域１３ａに属する第１長孔群領域部分Ｃ₁ が厚肉に形成されていると、剛性を有して髭の切断性能をよく確保できる。その一方で第２長孔群領域部分Ｃ₂ が撓み性を有する薄肉に形成されていると、第１外刃７の内刃摺接部分１３を第１内刃２の頂部に滑らかに添わせることができ、第１外刃７の一部が局部的に第１内刃２に強く接触し過ぎて早期に損耗することをよく防止できる。
【００１６】
【実施例】
図面は本発明に係る電気かみそりの実施例を示しており、内刃駆動用モータおよび二次電池を内蔵する本体ケース１の上部には、図１に示すごとく内刃支持フレームを介して、左右方向に長く延在する前後一対の第１・第２内刃２・３が横軸心まわりに回転自在に平行姿勢で支持されている。両内刃２・３は同径・同長であり、外周面にスパイラル状の切断刃５が形成されたロータリ内刃になっていて、前記モータで図外の動力伝達機構を介してそれぞれ同一方向に（後ろ側から前側に向かって）回転駆動される。
【００１７】
本体ケース１の上端には、図１に示すごとく外刃ホルダ６が取り外し可能に装着される。外刃ホルダ６には、後ろ側の第１内刃２の頂部外周面に摺接する第１外刃７と、前側の第２内刃３の頂部外周面に摺接する第２外刃８とを備えている。すなわち、第１外刃７は、断面アーチ状に曲げることにより内刃回転方向上手側（後ろ側）の一端部７ａを外刃ホルダ６の後ろ側壁部に固定し、内刃回転方向下手側（前側）の他端部７ｂを、両内刃２・３間の下方に位置する外刃ホルダ６側の止め壁９にばね部材１０で引っ張り勝手に取り付ける。第２外刃８は、これも断面アーチ状に曲げることにより、内刃回転方向上手側（後ろ側）の一端部８ａを前記止め壁９に固定し、内刃回転方向下手側（前側）の他端部８ｂを外刃ホルダ６の前側壁部にばね部材１１で引っ張り勝手に取り付ける。
【００１８】
図４において第１外刃７は、外刃ホルダ６に装着される前後端部７ａ・７ｂおよび左右端部分が無孔のベタ部分１２になっており、ベタ部分１２で囲まれた内側部分が穿孔処理された電鋳成形品である。そして第１外刃７は、前後方向の中央部分が第１内刃２の頂部に左右方向にわたって摺接する内刃摺接部分１３になっている。
【００１９】
第１外刃７の穿孔パターンは、図４に示すごとく内刃回転方向上手側（後ろ側）から順に、前後方向に長い多数の長孔１５が密に形成された前後狭幅の長孔群領域Ａと、前後方向に長く延びる多数のスリット１６が左右間にわたって一定ピッチで形成されたスリット群領域Ｂと、先の長孔１５と同一形状・同一パターンで形成されているが前後広幅になっている長孔群領域Ｃと、極小の微細孔１７が密に形成された微細孔群領域Ｄとがそれぞれ連続したものとなっている。なお、微細孔群領域Ｄには、該当領域の撓み性を調整するための抜き孔１８が設けられている。
【００２０】
このうち、第１外刃７の内刃摺接部分１３は、スリット群領域Ｂの後端側一部を除く大半部分と、広幅の長孔群領域Ｃの前端側一部を除く大半部分とで構成されている。そして、中央部に位置する長孔群領域Ｃは、中央側の第１長孔群領域部分Ｃ₁ と前側（端部）の第２長孔群領域部分Ｃ₂ とで構成されており、前者Ｃ₁ が後者Ｃ₂ よりも前後広幅に設定されている。すなわち、第１外刃７における内刃摺接部分１３のうち、髭切断に寄与する実効切断領域１３ａは、図２に示すごとく先のスリット群領域Ｂの大半部分と第１長孔群領域部分Ｃ₁ とである。
【００２１】
長孔群領域Ａ・Ｃにおける各長孔１５は、図５に示すごとく左右幅を３４０μｍ、前後長さを６５０μｍに設定し、スリット群領域Ｂの各スリット１６は、同じ図５に示すごとく左右幅を２５５μｍ、前後長さを２８９０μｍに設定した。
これから判るように本発明でのスリット１６とは、長孔１５に比べて４倍強の前後長さを有するものとして差別化されるものである。
【００２２】
次に、第１外刃７における各領域Ａ・Ｂ・Ｃ・Ｄなどの厚みと剛性の関係は、下記のとおりである。
後端部７ａ４２μｍ厚剛性あり
長孔群領域Ａ５３μｍ厚剛性なし、撓み性あり
スリット群領域Ｂ５３μｍ厚剛性あり
第１長孔群領域部分Ｃ₁ ５７μｍ厚剛性あり
第２長孔群領域部分Ｃ₂ ５３μｍ厚剛性なし、撓み性あり
微細孔群領域Ｄ５０μｍ厚剛性あり
前端部７ｂ４２μｍ厚剛性あり
【００２３】
ここでスリット群領域Ｂがこれと同じ５３μｍ厚の長孔群領域Ａよりも剛性を有するのは、左右に並ぶスリット１６・１６間の間隔が大きく、この間が補強リブの機能を果たすからである。微細孔領域Ｄの剛性が強いのも、５０μｍ厚と薄肉ではあるが、微細孔１７の占める面積よりも他の面積が大きく設定されているからである。後ろ側の長孔群領域Ａと第２長孔群領域部分Ｃ₂ とが剛性なしで撓み性を付与されているのは、第１内刃２の円形外周面の頂部に第１外刃７のとくに実効切断領域１３ａが円滑に添うようにして、第１外刃７に局部的な屈曲部が生じるのを防止するためである。逆に実効切断領域１３ａを構成するスリット群領域Ｂと第１長孔群領域部分Ｃ₁ に剛性を付与したのは、髭切断機能を有効に発揮させるためである。このように、領域によって厚みや剛性を変化させることは、例えば特公平５−２３４９号公報などで公知の電鋳による製造方法によって容易に達成できる。
【００２４】
図６において第２外刃８は、外刃ホルダ６に装着される前後端部８ａ・８ｂおよび左右端部分が無孔のベタ部分２０になっており、ベタ部分２０で囲まれた内側部分が穿孔処理された電鋳成形品である。そして第２外刃８は、前後方向の中央部分が第２内刃３の頂部に左右方向にわたって摺接する内刃摺接部分２１になっている。
【００２５】
第２外刃８の穿孔パターンは、図６に示すごとく内刃回転方向上手側（後ろ側）から順に、前後方向長さが前記長孔１５のそれよりも短い多数の短孔２２を密に形成した端部の短孔群領域Ｅと、前後方向に長く延びる多数のスリット２３が左右間にわたって一定ピッチで形成されたスリット群領域Ｆと、先の短孔２２と同一形状・同一パターンで形成されている中央の短孔群領域Ｇと、極小の微細孔２５が密に形成された微細孔群領域Ｈとがそれぞれ連続したものとなっている。
【００２６】
このうち、第２外刃８の内刃摺接部分２１は、図３および図６に示すごとくスリット群領域Ｆの後端側一部を除く大半部分と、中央の短孔群領域Ｇと、微細孔群領域Ｈの中央側一部とで構成されている。但し、第２外刃８における内刃摺接部分２１のうち、髭切断に寄与する実効切断領域２１ａは、図６に示すごとく先のスリット群領域Ｆの大半部分と中央の短孔群領域部分Ｇとである。
【００２７】
短孔群領域Ｅ・Ｇにおける各短孔２２は、図７に示すごとく平面視で六角形を呈しており、左右幅を４５０μｍ、前後長さを４９０μｍに設定した。ここでの各短孔２２は、第１外刃７の長孔１５に比べて前後方向長さが短い点に技術的意義を有し、その限りにおいて他の多角形状、円形状、楕円形状などであってもよい。また、スリット群領域Ｆの各スリット２３は、同じ図７に示すごとく左右幅を３７０μｍ、前後長さを２８９０μｍに設定した。これから判るように本発明でのスリット２３は、短孔２２に比べて約６倍近くの前後長さを有するものとして差別化されるものである。
【００２８】
次に、第２外刃８における各領域Ｅ・Ｆ・Ｇ・Ｈなどの厚みと剛性の関係は、下記のとおりである。
後端部８ａ４２μｍ厚剛性あり
端部の短孔群領域Ｅ５３μｍ厚剛性なし、撓み性あり
スリット群領域Ｆ５３μｍ厚剛性あり
中央の短孔群領域Ｇ５３μｍ厚剛性なし、撓み性あり
微細孔群領域Ｈ５０μｍ厚剛性あり
前端部８ｂ４２μｍ厚剛性あり
【００２９】
ここでスリット群領域Ｆがこれと同じ５３μｍ厚の短孔群領域Ｅ・Ｇよりも剛性を有するのは、左右に並ぶスリット２３・２３間の間隔が大きく、この間が補強リブの機能を果たすからである。微細孔領域Ｈの剛性が強いのも、５０μｍ厚と薄肉ではあるが、微細孔２５の占める面積よりも他の面積が大きく設定されているからである。短孔群領域Ｅ・Ｇが剛性なしで撓み性を付与されているのは、第２内刃３の円形外周面の頂部に第２外刃８のとくに実効切断領域２１ａが円滑に添うようにするためである。実効切断領域２１ａを構成するスリット群領域Ｆに剛性を付与したのは、髭切断機能を有効に発揮させるためである。このように、領域によって厚みや剛性を変化させることは、例えば特公平５−２３４９号公報などで公知の電鋳による製造方法によって容易に達成できる。
【００３０】
図１に示すごとく、第１内刃２および第２内刃３は、水平の横軸心まわりに後ろ側から前側に向かって回転する。これに伴い、第１外刃７および第２外刃８は、後端部７ａ・８ａを外刃ホルダ６に固定して、前端部７ｂ・８ｂをばね部材１０・１１でそれぞれ下向きに引っ張り付勢している。従って使用時には、皮ふに対して後ろ側の第１外刃７、ついで前側の第２外刃８を当て、この際に主たる髭剃り機能を発揮させることになる。
【００３１】
すなわち、長毛やくせ毛は第１外刃７のスリット群領域Ｂにおいて各スリット１６で起こされたのち、長孔群領域Ｃの長孔１５に誘い込まれて切断される。スリット群領域Ｂは薄肉になっているが、第１内刃２の頂部から外れた後側面に位置するので、スリット１６の開口面積が大きくてもこれに皮ふが入り込んで傷付くことはない。尤も、スリット群領域Ｂの大半は第１外刃７の内刃摺接部分１３を構成しているので、ここでも第１内刃２との協働で長毛の類が補助的に切断される。
【００３２】
長孔群領域Ｃは、肉厚が大で剛性のある中央側の第１長孔群領域部分Ｃ₁ と、肉厚が小で撓み性のある前側寄りの第２長孔群領域部分Ｃ₂ とからなる。第１外刃７の内刃摺接部分１３はスリット群領域Ｂから第２長孔群領域部分Ｃ₂ にまで及んでいるが、第１外刃７の実効切断領域１３ａはスリット群領域Ｂと第１長孔群領域部分Ｃ₁ である。従って、スリット群領域Ｂで引き起こされた長毛やくせ毛は、第１長孔群領域部分Ｃ₁ において第１内刃２との協働で切断される。このとき、第１長孔群領域部分Ｃ₁ の各長孔１５は開口面積が大きいので、長毛の誘い込みに有利であり、その一方で該領域部分Ｃ₁ の肉厚は他の領域に比べて最も大に設定してあるので、長孔１５内に皮ふが入り込んで傷付くのをよく防止できる。
【００３３】
第１内刃２の前後の側面部には、第１外刃７の後ろ側の長孔群領域Ａが非接触状態で、第２長孔群領域部分Ｃ₂ が一部非接触状態でそれぞれ対向するが、該当部分Ａ・Ｃ₂ は撓み性を有する。従って、第１外刃７の内刃摺接部分１３が第１内刃２の頂部を含む部分に滑らかに密着接当する。これにて前述の切断機能が有効に発揮される。なお、第２長孔群領域部分Ｃ₂ は第１内刃２の頂部から外れた前側面に位置するので、これが薄肉に設定されていても、そこでの長孔１５内に皮ふが入り込んで傷付くことはない。
【００３４】
次に、第１外刃７に引き続いて前側の第２外刃８で髭の切断が行われる。第２外刃８においても、剃り残された長毛はスリット群領域Ｆで起こされて、一部が切断作用を受けながら短孔群領域Ｇの短孔２２に誘い込まれる。ここでのスリット群領域Ｆの作用は第１外刃７のそれと同じである。短孔群領域Ｇは薄肉に形成されているので、第１外刃７側で予め短く切断された長毛や元々が短い短毛は、該領域Ｇで短孔２２に導入されて第２内刃３との協働で切断される。第２外刃８を皮ふに強く押し当てれば、深剃りが効くことを意味する。
【００３５】
第２内刃３の前後の側面部に対して、第２外刃８は端部の短孔群領域Ｅが非接触状態で、中央の短孔群領域Ｇの前端側部分が接触状態でそれぞれ対向するが、該当領域Ｅ・Ｇは撓み性を付与されている。従って、第２外刃８の内刃摺接部分２１が第２内刃３の頂部を含む部分に滑らかに密着接当する。これにて前述の切断機能が有効に発揮される。
【００３６】
これを要するにかみそりヘッドを皮ふに前後方向へ往復するよう当てることにより、主に第１外刃７のスリット群領域Ｂで長毛類を起こしたのち、第１長孔群領域部分Ｃ₁ で長毛を切断し、次に第２外刃８の短孔群領域Ｇで最終的な切断処理をすることになる。
【００３７】
実施例の全容は以上のようになっているが、第１外刃７における後ろ側の長孔群領域Ａと第２長孔群領域部分Ｃ₂ 、および第２外刃８における後ろ側の短孔群領域Ｅと前側の第２内刃３との非接触部分は、それぞれ任意の穿孔パターンに変更でき、第１外刃７および第２外刃８の実効切断領域１３ａ・２１ａが第１内刃２および第２内刃３の頂部まわりにそれぞれ滑らかに接触するよう機能するものであればよい。第２外刃８の短孔群領域Ｇの前端が内刃摺接部分１３を越えて形成されていてもよい。
【００３８】
また本発明の第１内刃２および第２内刃３は、左右方向に往復動されるものでもよい。更に、第１内刃２と第２内刃３との間には、超長毛を切断するために、固定刃と左右方向に往復駆動される可動刃とからなるセンタートリマーを外刃ホルダ６に備えたものとすることができる。
【図面の簡単な説明】
【図１】本発明の内容を概念的に説明する要部の縦断側面図
【図２】第１内刃と第１外刃との関係を説明する縦断側面図
【図３】第２内刃と第２外刃との関係を説明する縦断側面図
【図４】第１外刃の展開状態での平面図
【図５】第１外刃の要部の拡大平面図
【図６】第２外刃の展開状態での平面図
【図７】第２外刃の要部の拡大平面図
【符号の説明】
１本体ケース
２第１内刃
３第２内刃
６外刃ホルダ
７第１外刃
８第２外刃
１３第１外刃の内刃摺接部分
１３ａ第１外刃の実効切断領域
１５第１外刃の長孔
１６第１外刃のスリット
１７第１外刃の微細孔
２１第２外刃の内刃摺接部分
２１ａ第２外刃の実効切断領域
２２第２外刃の短孔
２３第２外刃のスリット
２５第２外刃の微細孔
Ａ第１外刃の長孔群領域
Ｂ第１外刃のスリット群領域
Ｃ第１外刃の長孔群領域
Ｃ₁ 第１外刃の第１長孔群領域部分
Ｃ₂ 第１外刃の第２長孔群領域部分
Ｄ第１外刃の微細孔群領域
Ｅ第２外刃の短孔群領域
Ｆ第２外刃のスリット群領域
Ｇ第２外刃の短孔群領域
Ｈ第２外刃の微細孔群領域[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric razor in which a pair of front and rear inner blades are provided in parallel with respective dedicated outer blades, and the perforation pattern of each outer blade is improved.
[0002]
[Prior art]
In Japanese Patent Application Laid-Open No. 5-317536, a rotary inner blade and a brushed rotating body are arranged in front and back on an upper portion of a main body case and supported so as to be rotatable in opposite directions. Then, the outer blade that is curved in an arch shape is brought into sliding contact with the rotary inner blade, and the long hair / comb hair introduction plate that is also curved in the arch shape is brought into sliding contact with the rotary body for raising. In the sliding contact region of the outer blade with the rotary inner blade, an original hair introduction hole group having a small hole diameter is provided, and a long hole-like introduction hole group for introducing long hairs and comb hairs is provided. On the other hand, the long hair / comb hair introduction plate is also provided with a long hole-shaped introduction hole group for introducing the long hair or the comb hair. There, it can be evaluated that a perforation pattern in which introduction hole groups having different hole diameters and shapes are arranged adjacent to one outer blade is employed.
[0003]
[Problems to be solved by the invention]
In the above-described conventional example, the hair raising rotary body and the long hair / comb hair introduction plate securely capture and raise the long hair / comb hair beforehand, and then introduce it into the original outer blade, and the outer blade and the inner blade cooperate with each other. Can cut smoothly.
[0004]
However, although the inner blade and the brushed rotating body are in the form of being driven to rotate side by side at the folding angle, the brushed rotating body does not contribute to the cutting of wrinkles, and the efficiency including long hair and comb hair is efficient. There was still room for improvement in this respect, as it was difficult to hold one hand to cut well.
[0005]
Accordingly, an object of the present invention is to improve the perforation pattern of two outer blades when cutting a ridge with each of a pair of inner blades provided at the front and rear and two outer blades slidably contacting each inner blade. In addition, the present invention is to provide an electric razor in which the shave function is dramatically improved.
[0006]
[Means for Solving the Problems]
In the present invention, as shown in FIG. 1, a pair of front and rear first inner cutters 2 and 3 that are driven to extend in the left-right direction are supported in parallel on the upper portion of the body case 1. In the electric shaver provided with the first and second outer blades 7 and 8 mounted in an arch shape so as to be in sliding contact with the inner blades 2 and 3, respectively, the inner blade of the first outer blade 7 with the first inner blade 2 As shown in FIGS. 2 and 4, the sliding contact portion 13 has a long hole group region C in which a number of long holes 15 that are long in the front-rear direction are formed, and the second outer blade 8 is connected to the second inner blade 3. As shown in FIGS. 3 and 6, the inner blade sliding contact portion 21 is formed with a short hole group region G in which a large number of short holes 22 having a shorter length in the front-rear direction than the long holes 15 are formed. long hole group region C of the first outer cutter 7 made of cast, the central first length in the effective cutting region 13a of the side hole group region portion C ₁ of the inner cutter sliding contact area 13 , And a second slot group region portion C ₂ deviating from lead effective cutting area 13a in succession, the first slot group region portion C ₁ and the second slot group region portion C _2, the same is formed in shape and the same pattern, the first slot group region portion C ₁ is than the second slot group region portion C ₂ is formed in a thick, of the second slot group region portion C ₂ part, characterized that you have overlap the inner cutter sliding contact area 13.
[0007]
More specifically, a slit group region in which a plurality of slits 16 extending in the front-rear direction are formed in the inner blade sliding contact portion 13 of the first outer blade 7 adjacent to the long hole group region C as shown in FIG. B. In addition, the inner blade sliding contact portion 21 of the second outer blade 8 has a slit group region F in which a large number of slits 23 extending in the front-rear direction are formed adjacent to the short hole group region G as shown in FIG. Have. These slit group regions B and F are preferably located on either one end side in the front-rear direction in each of the inner blade sliding contact portions 13 and 21.
[0008]
Also, the short-hole group region G of the second outer cutter 8 -Electroforming of is formed to be thinner than the first slot group region portion C ₁ of the first outer cutter 7.
[0009]
[Function and effect]
In the long hole group region C of the first outer blade 7, since the opening area of each long hole 15 long in the front-rear direction is large, it is easy to attract long hair and is effective for cutting long hair. In the short hole group region G of the second outer blade 8, in comparison with the long hole 15, short hair can be deeply shaved by the short hole 22 having a shorter length in the front-rear direction. Therefore, according to the present invention, when the outer blades 7 and 8 are pressed against the skin and moved back and forth, the two outer blades 7 and 8 having different functions independently and the inner blades 2 and 3 corresponding thereto are provided. And you can shave efficiently including short hair in a short time.
[0010]
In the inner blade sliding contact region 13 of the first outer blade 7, a slit group region B is provided adjacent to the previous long hole group region C, and the length of each slit 16 in the front-rear direction is the length of the long hole 15. Bigger than that. Accordingly, long hairs and comb hairs are introduced into the slits 16 so as to prevent the hairs from shaking in the left-right direction. The long hairs and comb hairs are partly cut in the slit group region B and are then guided into the long holes 15 to be sure. It can be cut into two.
[0011]
If the slit group region F is formed adjacent to the short hole group region G also in the inner blade sliding contact portion 21 of the second outer blade 8, long hairs are drawn into the short hole 22 through the slit 23 there. It will be advantageous.
[0012]
When the first outer blade 7 and the second outer blade 8 are formed by electroforming, the thickness of each region of the drilling pattern can be easily adjusted to a desired value depending on the function. That is, in the outer blade formation by electroforming, the amount of electrodeposition per unit area is the same, so the more electrodeposition portions (non-hole portions) in plan view, the thinner the corresponding region becomes. For example, the reason why the solid portions 12 and 20 described later become extremely thin is as described above. At the time of the electroforming, for example, if the first electrodeposition of the electrodeposited portion is performed at the center of the slits 16 and 23, the long hole 15 and the short hole 22, then the second electrodeposition is performed, and the thickness of the corresponding region can be easily adjusted. .
[0013]
However, according to the present invention, the long hole group region C of the electroformed first outer blade 7 is the first long hole group region portion C _{1 in} the effective cutting region 13a on the center side of the inner blade sliding contact portion 13. And a second long hole group region portion C ₂ that is continuously connected to the effective cutting region 13a and deviates from the effective cutting region 13a, and the first long hole group region portion C ₁ includes the second long hole group region portion C ₂ and the slit. It is formed thicker than the group region B. Therefore, when the opening area of each long hole 15 is large, it is advantageous for introduction of long hairs, but when the skin is pressed against the skin strongly, the skin enters the long hole 15 and is easily damaged. since the first slot group region portion C ₁ is formed thicker, thereby preventing good scratching of the skin. This means that the long hole group region C is not suitable for deep shaving of the eyelid.
[0014]
In this regard, the short hole group region G of the electroformed second outer blade 8 is formed thinner than the first long hole group region portion C _{1 of} the first outer blade 7. If the side is pressed strongly against the skin, the short holes 22 in the short hole group region G can compensate for the shortage caused by the long holes 15 and can be surely shaved. In that case, since the opening area of the short hole 22 is literally small, the skin does not enter and are not damaged. In this way, the user can make a deep shave or a shallow shave by selectively pressing either the first outer blade 7 or the second outer blade 8 with strength against the skin. .
[0015]
When the first slot group region portion C ₁ belonging to the effective cutting region 13a is formed in the thick may be secured to the cutting performance of the beard and rigid. On the other hand, when the second long hole group region portion C ₂ is formed to be thin and flexible, the inner blade sliding contact portion 13 of the first outer blade 7 is smoothly attached to the top of the first inner blade 2. Therefore, it is possible to well prevent a part of the first outer blade 7 from being in contact with the first inner blade 2 too much locally and being worn out early.
[0016]
【Example】
The drawing shows an embodiment of an electric shaver according to the present invention, and an upper part of a main body case 1 containing a motor for driving an inner blade and a secondary battery is provided with an inner blade support frame as shown in FIG. A pair of front and rear first and second inner blades 2 and 3 extending long in the direction are supported in a parallel posture so as to be rotatable around a horizontal axis. Both inner blades 2 and 3 have the same diameter and the same length, and are rotary inner blades having spiral cutting blades 5 formed on the outer peripheral surface. The motors are the same through a power transmission mechanism (not shown). It is rotationally driven in the direction (from rear side to front side).
[0017]
An outer blade holder 6 is detachably mounted on the upper end of the main body case 1 as shown in FIG. The outer blade holder 6 includes a first outer blade 7 that is in sliding contact with the outer peripheral surface of the top portion of the first inner blade 2 on the rear side, and a second outer blade 8 that is in sliding contact with the outer peripheral surface of the top portion of the second inner blade 3 on the front side. I have. In other words, the first outer blade 7 is bent into an arcuate cross section to fix one end portion 7a on the upper side in the inner blade rotation direction (rear side) to the rear side wall portion of the outer blade holder 6, and on the lower side in the inner blade rotation direction ( The other end portion 7b on the front side is attached to the retaining wall 9 on the outer blade holder 6 side, which is positioned below the inner blades 2 and 3, with a spring member 10 so as to be pulled freely. The second outer blade 8 is also bent in an arch shape in cross section to fix one end portion 8a on the upper side (rear side) in the inner blade rotation direction to the stop wall 9 and on the lower side (front side) in the inner blade rotation direction. The other end portion 8 b is pulled and attached to the front side wall portion of the outer blade holder 6 by the spring member 11.
[0018]
In FIG. 4, the first outer blade 7 has front and rear end portions 7 a and 7 b attached to the outer blade holder 6 and left and right end portions being non-porous solid portions 12, and an inner portion surrounded by the solid portion 12 is This is an electroformed molded product that has been subjected to perforation processing. The first outer blade 7 has an inner blade sliding contact portion 13 in which the central portion in the front-rear direction is in sliding contact with the top of the first inner blade 2 in the left-right direction.
[0019]
As shown in FIG. 4, the first outer blade 7 has a perforation pattern in which a plurality of long holes 15 having a narrow width in the front-rear direction are formed in order from the upper side (back side) in the inner blade rotation direction. The area A, the slit group area B in which a number of slits 16 extending in the front-rear direction are formed at a constant pitch between the left and right sides, and the same shape and pattern as the previous long holes 15, are wide in the front-rear direction. The long hole group region C and the fine hole group region D in which extremely small micro holes 17 are densely formed are continuous with each other. Note that the microhole group region D is provided with a hole 18 for adjusting the flexibility of the region.
[0020]
Among these, the inner blade sliding contact portion 13 of the first outer blade 7 includes the most part excluding a part of the rear end side of the slit group region B and the most part excluding a part of the front end side of the wide slot group region C. It consists of The long hole group region C located in the center is composed of a first slot group region portion C ₁ of the central side and the front side (end) second length as the hole group region portion C ₂ of the former C ₁ is set wider than the latter C ₂ . That is, in the inner blade sliding contact portion 13 of the first outer blade 7, the effective cutting region 13a that contributes to scissors cutting is the majority of the previous slit group region B and the first slot group region portion as shown in FIG. C ₁ .
[0021]
As shown in FIG. 5, the long holes 15 in the long hole group regions A and C are set to have a lateral width of 340 μm and a longitudinal length of 650 μm, and the slits 16 in the slit group region B are left and right as shown in FIG. The width was set to 255 μm and the length in the front-rear direction was set to 2890 μm.
As can be seen, the slit 16 in the present invention is differentiated as having a length of about 4 times that of the long hole 15.
[0022]
Next, the relationship between the thickness and rigidity of each region A, B, C, D, etc. in the first outer blade 7 is as follows.
Rear end 7a 42 μm thick Rigid long hole group area A 53 μm thick No rigidity, flexible slit group area B 53 μm thick Rigid first long hole group area C ₁ 57 μm thick Rigid second long hole group area C ₂ 53 μm thickness No rigidity, flexible micro hole group region D 50 μm thickness Rigid front end 7 b 42 μm thickness Rigid. [0023]
Here, the reason why the slit group region B is more rigid than the same 53 μm-thick long hole group region A is that the space between the slits 16 and 16 arranged on the left and right is large, and this space functions as a reinforcing rib. . The reason why the micropore region D is so rigid is that although it is 50 μm thick and thin, other areas are set larger than the area occupied by the micropores 17. The reason why the rear long hole group region A and the second long hole group region portion C ₂ are given flexibility without rigidity is that the first outer blade 7 is formed on the top of the circular outer peripheral surface of the first inner blade 2. In particular, the effective cutting region 13a smoothly follows to prevent the first outer blade 7 from being locally bent. On the contrary, the reason why the slit group region B and the first long hole group region portion C ₁ constituting the effective cutting region 13a are given rigidity is to effectively exhibit the scissors cutting function. In this way, changing the thickness and rigidity depending on the region can be easily achieved by a known electroforming manufacturing method in, for example, Japanese Patent Publication No. 5-2349.
[0024]
In FIG. 6, the second outer blade 8 has front and rear end portions 8 a and 8 b and left and right end portions attached to the outer blade holder 6, which are non-porous solid portions 20, and an inner portion surrounded by the solid portion 20 is the inner portion. This is an electroformed molded product that has been subjected to perforation processing. The second outer blade 8 has an inner blade sliding contact portion 21 in which the central portion in the front-rear direction slides in contact with the top of the second inner blade 3 in the left-right direction.
[0025]
As shown in FIG. 6, the drilling pattern of the second outer blade 8 is made up of a large number of short holes 22 whose length in the front-rear direction is shorter than that of the long holes 15 in order from the upper side (back side) in the inner blade rotation direction. The short hole group region E formed at the end, the slit group region F in which a large number of slits 23 extending in the front-rear direction are formed at a constant pitch between the left and right, and the same shape and pattern as the previous short holes 22 are formed. The central short hole group region G and the fine hole group region H in which the minute micro holes 25 are densely formed are continuous.
[0026]
Among these, the inner blade sliding contact portion 21 of the second outer blade 8 includes the most part excluding the rear end side part of the slit group region F as shown in FIGS. 3 and 6, the central short hole group region G, It is comprised by the center side part of the micropore group area | region H. FIG. However, in the inner blade sliding contact portion 21 of the second outer blade 8, the effective cutting region 21a that contributes to scissor cutting is the majority of the previous slit group region F and the central short hole group region portion as shown in FIG. G.
[0027]
Each short hole 22 in the short hole group regions E and G has a hexagonal shape in a plan view as shown in FIG. 7, and the left-right width is set to 450 μm and the front-rear length is set to 490 μm. Each short hole 22 here has a technical significance in that the length in the front-rear direction is shorter than the long hole 15 of the first outer blade 7, and other polygonal shapes, circular shapes, elliptical shapes, etc. It may be. Each slit 23 in the slit group region F was set to have a lateral width of 370 μm and a longitudinal length of 2890 μm as shown in FIG. As can be seen from the above, the slit 23 in the present invention is differentiated as having a front-rear length of about 6 times that of the short hole 22.
[0028]
Next, the relationship between the thickness and rigidity of each region E, F, G, H, etc. in the second outer blade 8 is as follows.
Rear end portion 8a 42 μm thickness Stiff short hole group region E 53 μm thickness No rigidity, flexible slit group region F 53 μm thickness Stiff central hole group region G 53 μm thickness No rigidity, flexible micro hole group Area H 50 μm thick with rigidity Front end 8b 42 μm thick with rigidity [0029]
Here, the reason why the slit group region F is more rigid than the same 53 μm-thick short hole group regions E and G is that the distance between the slits 23 and 23 arranged on the left and right is large, and this space functions as a reinforcing rib. It is. The reason why the micropore region H is so rigid is that although it is 50 μm thick and thin, another area is set larger than the area occupied by the micropores 25. The reason why the short hole group regions E and G are provided with flexibility without rigidity is that the effective cutting region 21a of the second outer blade 8 is smoothly attached to the top of the circular outer peripheral surface of the second inner blade 3. It is to do. The reason why the slit group region F constituting the effective cutting region 21a is provided with rigidity is to effectively exhibit the scissor cutting function. In this way, changing the thickness and rigidity depending on the region can be easily achieved by a known electroforming manufacturing method in, for example, Japanese Patent Publication No. 5-2349.
[0030]
As shown in FIG. 1, the first inner blade 2 and the second inner blade 3 rotate from the rear side toward the front side around a horizontal horizontal axis. Along with this, the first outer blade 7 and the second outer blade 8 fix the rear end portions 7a and 8a to the outer blade holder 6 and pull the front end portions 7b and 8b downward by the spring members 10 and 11, respectively. It is fast. Therefore, at the time of use, the first outer blade 7 on the rear side and then the second outer blade 8 on the front side are applied to the skin, and the main shaving function is exhibited at this time.
[0031]
In other words, long hairs and comb hairs are raised in the slits 16 in the slit group region B of the first outer blade 7 and then are drawn into the long holes 15 in the long hole group region C and cut. Although the slit group region B is thin, since it is located on the rear side surface deviated from the top of the first inner blade 2, even if the opening area of the slit 16 is large, the skin does not enter and be damaged. However, since most of the slit group region B constitutes the inner blade sliding contact portion 13 of the first outer blade 7, the long hair type is also supplementarily cut in cooperation with the first inner blade 2. .
[0032]
The long hole group region C includes a first long hole group region portion C ₁ on the center side having a large wall thickness and rigidity, and a second long hole group region portion C _{2 on the} front side having a small wall thickness and flexibility. It consists of. The inner blade sliding contact portion 13 of the first outer blade 7 extends from the slit group region B to the second long hole group region portion C ₂ , but the effective cutting region 13 a of the first outer blade 7 is the slit group region B and a first elongate hole group region portion C _1. Therefore, the long hair and the comb hair caused in the slit group region B are cut in cooperation with the first inner blade 2 in the first long hole group region portion C ₁ . At this time, each elongated hole 15 of the first elongated hole group region portion C ₁ has a large opening area, which is advantageous for attracting long hairs, while the thickness of the region portion C ₁ is larger than that of other regions. Since it is set to the maximum, it is possible to well prevent the skin from getting into the long hole 15 and being damaged.
[0033]
On the front and rear side portions of the first inner blade 2, the long hole group region A on the back side of the first outer blade 7 is in a non-contact state, and the second long hole group region portion C ₂ is in a non-contact state, respectively. Although facing each other, the corresponding portions A and C ₂ have flexibility. Therefore, the inner blade sliding contact portion 13 of the first outer blade 7 smoothly and tightly contacts the portion including the top portion of the first inner blade 2. Thus, the above cutting function is effectively exhibited. Since the second long hole group region portion C ₂ is located on the front side surface deviated from the top of the first inner blade 2, even if it is set to be thin, the skin enters the long hole 15 and scratches there. It won't stick.
[0034]
Next, following the first outer blade 7, cutting of the ridge is performed by the second outer blade 8 on the front side. Also in the second outer blade 8, the long hair left after shaving is raised in the slit group region F, and a part thereof is drawn into the short hole 22 of the short hole group region G while receiving a cutting action. The action of the slit group region F here is the same as that of the first outer blade 7. Since the short hole group region G is formed to be thin, long hairs that have been cut short in advance on the first outer blade 7 side or short hairs that are originally short are introduced into the short holes 22 in the region G, and the second inner blade 3 is cut in cooperation with. If the second outer blade 8 is pressed firmly against the skin, it means that deep shaving is effective.
[0035]
With respect to the front and rear side portions of the second inner blade 3, the second outer blade 8 has the short hole group region E at the end in a non-contact state and the front end side portion of the central short hole group region G in a contact state, respectively. Although facing each other, the corresponding regions EG are given flexibility. Accordingly, the inner blade sliding contact portion 21 of the second outer blade 8 smoothly and tightly contacts the portion including the top of the second inner blade 3. Thus, the above cutting function is effectively exhibited.
[0036]
By applying to reciprocally this short back-and-forth direction razor head skin, mainly after caused the long hair such slit group region B of the first outer cutter 7, Woolly first slot group region portion C ₁ Next, a final cutting process is performed on the short hole group region G of the second outer blade 8.
[0037]
Although the overall contents of the embodiment are as described above, the rear long hole group region A and the second long hole group region portion C ₂ in the first outer blade 7 and the rear short portion in the second outer blade 8 are described. The non-contact portion between the hole group region E and the front second inner blade 3 can be changed to an arbitrary drilling pattern, and the effective cutting regions 13a and 21a of the first outer blade 7 and the second outer blade 8 are the first inner blades. Any one that functions so as to smoothly contact the periphery of the top of the blade 2 and the second inner blade 3 may be used. The front end of the short hole group region G of the second outer blade 8 may be formed beyond the inner blade sliding contact portion 13.
[0038]
Moreover, the 1st inner blade 2 and the 2nd inner blade 3 of this invention may be reciprocated in the left-right direction. Further, a center trimmer consisting of a fixed blade and a movable blade reciprocated in the left-right direction is provided in the outer blade holder 6 between the first inner blade 2 and the second inner blade 3 in order to cut extra long hair. It can be provided.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a main part for conceptually explaining the contents of the present invention. FIG. 2 is a longitudinal side view for explaining the relationship between a first inner blade and a first outer blade. FIG. 4 is a plan view of the first outer blade in an unfolded state. FIG. 5 is an enlarged plan view of the main part of the first outer blade. Plan view of the outer blade in the unfolded state [FIG. 7] Enlarged plan view of the main part of the second outer blade [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body case 2 1st inner blade 3 2nd inner blade 6 Outer blade holder 7 1st outer blade 8 2nd outer blade 13 Inner blade sliding contact part 13a of 1st outer blade 1st effective cutting area 15 of 1st outer blade 1st Outer blade long hole 16 First outer blade slit 17 First outer blade micro hole 21 Second outer blade inner blade sliding contact portion 21a Second outer blade effective cutting region 22 Second outer blade short hole 23 2 Slit 25 of the outer blade Fine hole A of the second outer blade Long hole group region B of the first outer blade Slit group region C of the first outer blade Long hole group region C of the first outer blade C _{1 of} the first outer blade 1 long hole group region portion C ₂ second long hole group region portion D of the first outer blade minute hole group region E of the first outer blade short hole group region F of the second outer blade slit group region G of the second outer blade Short hole group region H of the second outer blade Fine hole group region of the second outer blade

Claims

A pair of front and rear first inner blades (2) and a second inner blade (3), which are driven to extend in the left-right direction, are supported in parallel on the upper portion of the main body case (1). In the electric shaver provided with the first and second outer blades (7, 8) mounted in an arched cross section so as to be in sliding contact with each of 2.3)
A long hole group region (C) in which a plurality of long holes (15) long in the front-rear direction are formed in the inner blade sliding contact portion (13) with the first inner blade (2) of the first outer blade (7). Have
The inner blade sliding contact portion (21) of the second outer blade (8) with the second inner blade (3) has a number of short holes (22) that are shorter in the front-rear direction than the long holes (15). The formed short hole group region (G) is formed,
The long hole group region (C) of the electroformed first outer blade (7) is the first long hole group region portion (C) in the effective cutting region (13a) on the center side of the inner blade sliding contact portion (13). ₁ ) and a second elongated hole group region portion (C ₂ ) that is continuously connected to the effective cutting region (13a) and deviated from the effective cutting region (13a) ,
The first slot group region portion (C ₁ ) and the second slot group region portion (C ₂ ) are formed in the same shape and pattern,
The first long hole group region portion (C ₁ ) is formed thicker than the second long hole group region portion (C ₂ ),
Electric shaver portion of the second slot group region portion (C ₂₎ is characterized that you have overlap the inner cutter sliding portion (13).

A slit group region (B) in which a plurality of slits (16) extending in the front-rear direction are formed adjacent to the long hole group region (C) in the inner blade sliding contact portion (13) of the first outer blade (7). The electric razor according to claim 1, comprising:

A slit group region (a plurality of slits (23) extending in the front-rear direction adjacent to the short hole group region (G) is formed in the inner blade sliding contact portion (21) of the second outer blade (8). The electric shaver according to claim 1 or 2, which has F).

-Electroforming short hole group region of the second outer edge (8) (G), a request that is formed into a thin walled than the first slot group region portion of the first outer cutter (7) (C ₁₎ Item 1. An electric razor according to item 1 .