JP4858931B2

JP4858931B2 - Electric razor

Info

Publication number: JP4858931B2
Application number: JP2001120767A
Authority: JP
Inventors: 義典泰藤; 伸紀八尋; 祐介岡本; 康雄山下
Original assignee: Kyushu Hitachi Maxell Ltd
Current assignee: Kyushu Hitachi Maxell Ltd
Priority date: 2001-04-19
Filing date: 2001-04-19
Publication date: 2012-01-18
Anticipated expiration: 2021-04-19
Also published as: JP2002306866A

Description

【０００１】
【発明の属する技術分野】
本発明は、かみそりヘッドが本体ケースに対して浮動可能に支持してある電気かみそりに関する。
【０００２】
【従来の技術】
この種の電気かみそりは、例えば特開２０００−１４９４３公報に公知である。そこでは、モーターをかみそりヘッドと一体に設けて、かみそりヘッドの全体をケース本体に対してばねで浮動可能に支持している。ケース本体とモーターケースとの間は防水シールでシールしてある。
【０００３】
【発明が解決しようとする課題】
上記のように、かみそりヘッドを浮動支持した電気かみそりによれば、外刃の肌に対する追随しやすさを高めて滑らかな肌触りが得られるうえ、肌が傷付きにくい。しかし問題がない訳ではない。この種の電気かみそりでは、かみそりヘッドが肌に密着した状態のまま浮き沈みするため、比較的短いひげを深ぞりする場合に使いにくい。詳しくは、深ぞりする場合には、ばねの弾性に逆らってかみそりヘッドを肌に強く押し付け続ける必要があるが、僅かとは言え、ばねの反発力の分だけ余分な押し付け力が必要で、使い勝手に改善の余地がある。また、かみそりヘッドが肌に密着した状態のまま浮き沈みするため、長いひげやくせ毛をそる際等に、くせ毛や長いひげが肌にそって押し倒されてしまい、ひげ切断を効果的に行えないことがある。
【０００４】
本発明では、かみそりヘッドを浮動支持した電気かみそりに特有の、上記のような問題点を解消するために、かみそりヘッドの浮動動作を抑止することを検討している。この種の特性変更に関して、電気かみそりの基本構造は異なるが、ひげ切断用のユニットの突出量を大小に変更可能とすることが特開昭６２−１７２９８７号公報に公知である。そこでは、伏せ皿状の外刃と、外刃の上壁内面で回転する内刃とでひげ切断用のユニットを構成し、このユニットのケースに対する突出量を複数段に変更して、ひげ切断ユニットの特性を個人の好みに応じて変更している。
【０００５】
本発明の目的は、かみそりヘッドを浮動支持した電気かみそりにおいて、かみそりヘッドの浮動状態を切り換えて押し下げ反力を変更できるようにし、以て使用者のひげや肌の状態などに対応して、常に軽快にひげそりを行える電気かみそりを提供することにある。本発明の他の目的は、かみそりヘッドの浮動状態を円滑に切り換え操作できる切換機構でありながら、その構造の簡素化を実現し、切換機構を備えた電気かみそりをより低コストで提供することにある。本発明の他の目的は、切換機構をコンパクトに組むことができ、その分だけ電気かみそりを小型化することにある。本発明の他の目的は、切換機構の配置形態を最適化して、かみそりヘッドの浮動状態の切り換えを軽快に行えるうえ、かみそりヘッドを前後、あるいは左右方向へも浮動支持できる電気かみそりを提供することにある。本発明の他の目的は、切換機構の構成部材のそれぞれを円滑に案内支持でき、かみそりヘッドの浮動状態の切り換えを、常に安定した状態の許に行える信頼性に優れた電気かみそりを提供することにある。
【０００６】
【課題を解決するための手段】
本発明の電気かみそりは、本体ケース１の上部に設けたかみそりヘッド２が、本体ケース１に対して弾性材３１で上下浮動自在に支持してある。本体ケース１とかみそりヘッド２との間に、かみそりヘッド２の上下位置を切り換えて、前記弾性材３１によるかみそりヘッド２の押し下げ反力を複数段に変更する切換機構Ｒを設ける。
【０００７】
上記の切換機構Ｒは、本体ケース１の外面に設けた操作具６２と、本体ケース１に配置されて上下動できる枠体６１とを含む。枠体６１を操作具６２で上下に切り換え操作して、かみそりヘッド２を、通常の浮動位置Ｒ１と、弾性材３１によるかみそりヘッド２の押し下げ反力が増強された少なくとも１個の規制位置Ｒ２とに上下操作できるようにする。
【０００８】
上記の切換機構Ｒは、本体ケース１の外面に設けた操作具６２と、本体ケース１に配置されて上下動できる枠体６１とを含む。枠体６１を操作具６２で上下に切り換え操作して、かみそりヘッド２を、全浮動を許す浮動位置Ｒ１と、浮動動作を規制する少なくとも１個の規制位置Ｒ２とに上下操作する。
【０００９】
かみそりヘッド２を構成するモーター台２２の下部に、突起８１を備えた一対の脚片８０を突設する。枠体６１は、突起８１と係合する係合部６７を備えた一対の腕部６４と、腕部６４どうしを繋ぐ枠基部６５とを一体に備えている。枠体６１と、本体ケース１で左右スライド自在に案内支持した操作具６２とは、操作具６２の左右スライド動作を上下動作に変換するカム構造６３を介して連結する。
【００１０】
弾性材は、かみそりヘッド２を浮動支持するばね３１と、本体ケース１とかみそりヘッド２との間を水密状に封止する成形パッキン１５とからなる。
【００１１】
枠体６１は本体ケース１の前面壁と左右側壁との内面に沿って上下動自在に摺動案内する。モーター台２２の下部両側に設けた左右一対の脚片８０と、枠体６１の左右一対の腕部６４とは、かみそりヘッド２の前後中心に位置する突起８１と溝６７を介して連結する。以て、かみそりヘッド２を前後、および左右方向方向へも浮動できるようにする。
【００１２】
カム構造６３は、操作具６２の内面に回転自在に軸支したローラー７５と、枠基部６６に設けられて、前記ローラー７５で押し下げ操作されるカム部６８とからなる。
【００１３】
枠体６１は金属板材を素材とするプレス成形品からなり、その枠基部６６に階段状のカム部６８を形成する。
【００１４】
本体ケース１の前面に設けた内外壁１ａ・１２ａの間に枠体６１を収容して、枠体６１を上下スライド自在に案内支持する。外壁１２ａの外面に配置した操作具６２を、外壁１２ａに設けたスライド溝７４と、内壁１ａに設けたローラー７５用のガイド凹部７６とで左右スライド自在に案内支持する。
【００１５】
本体ケース１の前面に設けた内外壁１ａ・１２ａのいずれか一方に、他方の壁と接当して両壁１ａ・１２ａの対向間隔を一定に維持するリブ７１を設ける。このリブ７１で枠体６１を左右遊動不能にスライド案内する。
【００１６】
【発明の作用効果】
本発明では、浮動支持したかみそりヘッド２の浮動状態を切換機構Ｒで切り換えて、その上下位置を複数段に変更することにより、ひげの長さや肌の状態等に応じて、かみそりヘッド２の押し下げ反力を複数段に変更できる。従って、本発明の電気かみそりによれば、かみそりヘッド２の押し下げ反力を小さくする場合には、かみそりヘッド２を肌に押し付ける際に、肌に対して外刃１０をソフトに押圧し密着させることができ、肌のストレスを緩和できる。また、かみそりヘッド２を切換装置Ｒで切り換えて、かみそりヘッド２の押し下げ反力を大きく設定する場合には、かみそりヘッド２の沈み込み動作を規制できるので、かみそりヘッド２を肌に押し付ける際に、外刃１０を肌により強く押し付けて密着させることができ、従って深ぞりが可能となる。なお、かみそりヘッド２の押し下げ反力を複数段に変更することには、全浮動を許す状態と、かみそりヘッド２を全浮動ストロークの全部あるいは中途部まで下降してその状態を保持することと、かみそりヘッド２を任意の位置で移動不能にロックした状態とのいずれをも含むこととする。
【００１７】
かみそりヘッド２を切換機構Ｒで、通常の浮動位置Ｒ１と、弾性材３１によるかみそりヘッド２の押し下げ反力が増強された少なくとも１個の規制位置Ｒ２とに上下操作できる電気かみそりによれば、規制位置Ｒ２において、かみそりヘッド２の押し下げ反力を大きくして、外刃１０を肌により強く押し付けて密着させ、深ぞりすることができる。なお、かみそりヘッド２の押し下げ反力を増強した状態には、かみそりヘッド２を全浮動ストロークの全部あるいは中途部まで下降してその状態を保持することと、かみそりヘッド２を任意の位置で移動不能にロックした状態とのいずれもが含まれる。
【００１８】
本体ケース１に設けた枠体６１と操作具６２とで切換機構Ｒを構成し、枠体６１を操作具６２で上下に切り換え操作して、かみそりヘッド２を、浮動位置Ｒ１と、少なくとも１個の規制位置Ｒ２とに上下操作する電気かみそりによれば、切換機構Ｒの構造を簡素化して、その製作コストを減少できる。
【００１９】
本体ケース１で案内支持した操作具６２の左右スライド動作を、カム構造６３を介して枠体６１の上下動作に変換し、枠体６１でモーター台２２の下部に設けた一対の脚片８０を突起８１を介して下降操作する切換機構Ｒによれば、かみそりヘッド２を下降操作するとき、その周面の対向２箇所において枠体６１の操作力を伝えることができるので、安定した状態でかみそりヘッド２の浮動状態を切り換え操作でき、例えば、切り換え操作途中のかみそりヘッド２が傾動して、本体ケース１に引っ掛かるなどの動作不良を一掃できるうえ、操作具６２を左右に切り換え操作するだけの簡単な動作で、かみそりヘッド２を浮動位置Ｒ１と規制位置Ｒ２とに切り換えることができる。
【００２０】
かみそりヘッド２を浮動支持するばね３１の弾性力に加えて、本体ケース１とかみそりヘッド２との間を水密状に封止する成形パッキン１５の弾性を利用してかみそりヘッド２を浮動支持すると、ばね３１のみでかみそりヘッド２を支持する場合に比べて、かみそりヘッド２が沈み込むときの反力特性を好適化できる。ばね３１の張力特性は直線的に変化するが、成形パッキン１５の場合には、その撓み量が増えるほど変形応力が急増し、変形応力は２次曲線状に変化する。従って、かみそりヘッド２の沈み込みストロークが増えれば増えるほど、押し下げ反力を大きくでき、かみそりヘッド２の肌に対する追随性を高めて円滑なひげそりを行うことができる。
【００２１】
枠体６１を本体ケース１の前面壁と左右側壁との内面に沿って配置し、その一対の腕部６４に設けた溝６７を左右一対の脚片８０に連結する切換機構Ｒによれば、上下浮動できるかみそりヘッド２を、突起８１を中心にして前後、および左右方向方向へも浮動可能に支持できるので、かみそりヘッド２の肌に対する追随性を高めて円滑なひげそりを行うことができる。多くの場合、本体ケース１の左右幅が前後幅より大きく設定されるので、かみそりヘッド２の前後を枠体６１で下降操作する場合に比べて、腕部６４の長さを短くして枠基部６６に作用するモーメントを最小限化できる、その分だけ枠体６１を薄く、小さく形成して、切換機構Ｒをコンパクト化できる。
【００２２】
操作具６２の内面に軸支した回転自在なローラー７５と、このローラー７５で押し下げ操作されるカム部６８とで構成したカム構造６３によれば、操作具６２に同行して回転するローラー７５でカム部６８を介して枠体６１を押し下げ操作できるので、枠体６１を確実に、しかもより小さな操作力で軽快に切り換え操作できるうえ、ロック機構などの位置保持構造を設ける必要もなく、かみそりヘッド２を規制位置Ｒ２に位置保持できるので、その分だけ切換機構Ｒの構造を簡素化できる。
【００２３】
プレス成形品からなる枠体６１の枠基部６６に、階段状のカム部６８を形成した切換機構Ｒによれば、浮動位置Ｒ１と規制位置Ｒ２との位置の切り換えを明確化して、中途半端な位置にかみそりヘッド２が位置保持されるのを防止できるうえ、かみそりヘッド２を一瞥するだけで現在の切り換え状態を確認できる。
【００２４】
本体ケース１の前面に設けた内外壁１ａ・１２ａで枠体６１を上下スライド自在に案内支持し、操作具６２を外壁１２ａに設けたスライド溝７４と、内壁１ａに設けたローラー７５用のガイド凹部７６とで左右スライド自在に案内支持する切換装置Ｒによれば、切り換え操作時における枠体６１の前後振れを内外壁１ａ・１２ａで規制し、さらに、操作具６２をスライド溝７４とガイド凹部７６とで支えて左右にスライド案内でき、切換機構Ｒの切り換え動作を円滑化できる。
【００２５】
内外壁１ａ・１２ａのいずれか一方に設けたリブ７１で、他方の壁との対向間隔を一定に維持するケース構造によれば、外壁１２ａに外力が作用するような場合にも、内外壁１ａ・１２ａの対向間隔を一定に維持して、枠体６１を安定した状態で上下スライド可能に案内支持でき、従って切換機構Ｒの切り換え動作を円滑化できる。
【００２６】
先のリブ７１で枠体６１を左右遊動のみ不能に移動規制すると、枠体６１が傾動しながら上下動するのを防いで、左右の腕部６４を均等に下降移動でき、従って、切換機構Ｒの切り換え動作を円滑化できる。
【００２７】
【実施例】
図１ないし図１３は本発明に係る水洗い式の電気かみそりの実施例を示す。図２ないし図５において、電気かみそりは、本体ケース１とその上部に設けたかみそりヘッド２とを有し、本体ケース１の前面に縦長の表示パネル３を設け、その上下にモーター起動用のスイッチボタン４や、運転モードを切り換えるモード切換ボタン５、および両ボタン４・５の切り換え状態を表示する表示灯６などを設けてなる。表示パネル３の上方には、操作具が左右スライド自在に設けてある。本体ケース１の後面には、きわぞり刃７と、きわぞり刃７を起伏操作するスライドノブ８が設けてある。かみそりヘッド２には前後一対の内刃９および外刃１０と、センター刃１１とが設けてある。
【００２８】
かみそりヘッド２より下側の本体部は、上下端が開口する異形筒形の本体ケース１と、その内部に上面側から差し込み装填される電装品ユニット１３と、ケース下面側から組み付けられる底ケース１４と、本体ケース１の前面に係合固定される樋体状の前カバー１２とからなり、電装品ユニット１３の上部にかみそりヘッド２が成形パッキン１５を介して固定される。
【００２９】
電装品ユニット１３を本体ケース１内に装填し、電装品ユニット１３と本体ケース１に内嵌した底ケース１４とをビスで締結し、先の成形パッキン１５を本体ケース１の内面に密接させ、さらに底ケース１４側の締結部をＯリングやパッキンでシールすることにより、本体ケース１内への水の浸入を阻止し、かみそりヘッド２の水洗いを可能としている。電装品ユニット１３は、プラスチック成形された内フレーム１６にモーター１７、二次電池１８、スイッチやＬＥＤ、および電子部品等が実装された回路基板１９などを組み付けてなる。モーター１７の出力軸１７ａの部分には水密用のパッキン２０が設けてある。図９に示すように、前カバー１２の前面には縦長の開口１２ｂが開口してあり、先の表示パネル３がこの開口１２ｂからカバー外面に露出させてある。
【００３０】
図４においてかみそりヘッド２は、モーター１が固定されるモーター台２２と、それぞれ逆門形に形成されるヘッドフレーム２３と、内刃支持台２４と、内刃フレーム２５と、外刃ホルダー２６と、これらの外殻体に組まれる多数の部品などで構成する。先の内刃９は内刃フレーム２５に、外刃１０とセンター刃１１とは外刃ホルダー２６にそれぞれ組み付けてある。かみそりヘッド２の下部には第１伝動室２７が、さらにその一側部には第２伝動室２８がそれぞれ区画してある。両伝動室２７・２８は、後述するように隔壁２９で密閉状に区画してある。
【００３１】
モーター台２２は、前後壁と左右壁とで囲まれた上面が開口する枠体からなり、その下面にモーター１７と、モーターホルダー３０が固定してある。モーター台２２の両側下部の前後中央には左右一対の脚片８０が突設され、その突端外側面に突起８１が形成してある。後述するように、かみそりヘッド２の浮動状態は脚片８０を介して規制される。図５に示すように、モーター１７の下半分に外嵌固定されるモーターホルダー３０は、内フレーム１６に対して上下動自在に支持され、さらに左右一対の圧縮コイルばねからなるばね３１（弾性材）で押し上げ付勢されている。つまり、かみそりヘッド２の全体は、内フレーム１６を介して本体ケース１に対して前後、左右、および上下方向へ浮動可能に支持してあり、これらの動きを許すために、モーターホルダー３０と内フレーム１６の間、および本体ケース１とかみそりヘッド２の間に、それぞれ浮動隙間を設けている。モーター台２２とモーターホルダー３０との間は、先の成形パッキン１５で密閉されており、この成形パッキン１５も、かみそりヘッド２の重量の一部を浮動支持するための弾性材として機能している。
【００３２】
ヘッドフレーム２３は、下向きに開口するケース部３２と、ケース部３２の左右両端に立設した側壁３３とを有し、ケース部３２をモーター台２２に蓋合わせ状に接合固定することにより、両者２２・３２の接合面間に第１伝動室２７を区画している。この接合状態において側壁３３と隔壁２９とは面一状になっており、これら両者２９・３３と、これらに被せ付けられるカバー３４とで第２伝動室２８を区画している。カバー３４は、側壁３３に着脱可能に係合固定してある。右方のカバー３５には、外刃ホルダー２６をロック解除操作するための解除ボタン３６が設けてある。
【００３３】
図４において内刃支持台２４は、上向きに開口する区画を備えた台基部２４ａと、その左右両端から立設した左右一対の腕２４ｂと、台基部２４ａの上面開口を塞ぐ蓋体２４ｃとからなる。左右の腕２４ｂに設けた軸をヘッドフレーム２３の側壁３３の上部で軸支することにより、内刃支持台２４は前後揺動自在に、つまりヘッドフレーム２３に対して首振可能に軸支される。一対の腕２４ｂの間に、後述する内刃フレーム２５が着脱自在に圧嵌係合される。台基部２４ａの内部には、内刃支持台２４に外嵌装着した外刃ホルダー２６を、抜け外れ不能にロック保持するためのロック機構と、センター刃用の振動子５０とが設けられる。
【００３４】
内刃フレーム２５は、基壁３８と、基壁３８の左右両端に立設した一対の側壁３９とを有し、両側壁３９の上端間に前後一対の内刃９をそれぞれ回転自在に軸支している。図４に向かって左方の内刃軸には小直径の内刃歯車４０が固定してあり、この歯車４０が内刃フレーム２５に設けた受動歯車４１と噛み合うことにより、モーター動力を前後の内刃９へ同時に伝えるようになっている。内刃清掃のために、各内刃９の下方に回転ブラシ４２を配置し、その左右端を側壁３９に組み付けたスライドピースで回転自在に軸支している。内刃フレーム２５は、内刃支持台２４に対してその上方から係合装着される。
【００３５】
モーター１７の動力は、第１の伝動室２７に収容したギヤ群Ｇを介して、最初は横向きに、次いで第２の伝動室２８に収容した巻掛伝動機構で上向きに伝動され、受動歯車４１と内刃歯車４０を介して前後一対の内刃９へと伝える。図６においてギヤ群Ｇは、モーター動力を減速して伝動する４個の平歯車Ｇ１〜Ｇ４と、隔壁２９で水平に軸支された中間軸４４とギヤ群Ｇの終段ギヤＧ４との間に設けた一対の傘歯車４５・４６とで構成する。中間軸４４の両端は、第１・第２の各伝動室２７・２８に突き出ており、その一端に受動側の傘歯車４６を固定し、他端に巻掛伝動機構の原動プーリー５２を固定する。ギヤ群Ｇから生じるギヤ騒音が、第１の伝動室２７から第２の伝動室２８へ素通しで伝播するのを防ぐために、両室２７・２８の間を隔壁２９で密閉状に区分している。モーター１７の出力軸１７ａに固定される初段の平歯車Ｇ１の上部に２個の偏心カム（回転駆動体）４７・４８を設け、これらの偏心カム４７・４８できわぞり刃用の振動子４９と、センター刃用の振動子５０とを同時に往復駆動できるようにしている。
【００３６】
図８に示すように、巻掛伝動機構は、中間軸４４に固定した原動プーリー５２と、終段ギヤ軸５３に固定した従動プーリー５４と、両プーリー５２・５４に巻き掛けたタイミングベルト５５と、タイミングベルト５５の弛み側移行軌跡の外側に配置したテンション体５６とで構成する。テンション体５６は軸５７のまわりに前後揺動でき、ばね５８で反時計回転方向へ揺動付勢されて、先端のローラ５９がタイミングベルト５５に外接している。
【００３７】
先に説明したように、かみそりヘッド２は本体ケース１に対して浮動自在に支持してあるが、この浮動動作を規制するために、かみそりヘッド２と本体ケース１との間に、かみそりヘッド２の浮動ストロークを切り換える切換機構Ｒを設けている。図９において切換機構Ｒは、本体ケース１と前カバー１２との間に配置した枠体６１と、前カバー１２の前面上部に配置した操作具６２と、操作具６２の左右スライド動作を上下動作に変換するカム構造６３と、枠体６１の動作を受け継ぐ左右一対の脚片８０などで構成する。
【００３８】
図９において、枠体６１は左右一対の腕部６４と、両腕部６４どうしを傾斜壁６５を介して繋ぐ枠基部６６とを一体に備えたステンレス製のプレス金具からなる。各腕部６４には、先の脚片８０の突起８１と係合する縦長の溝（係合部）６７が通設してある。枠基部６６の中央上縁にはカム部６８を形成し、その下縁に下向きの切欠６９を形成する。
【００３９】
図９および図１０に示すように、枠体６１は、腕部６４の溝６７が脚片８０の突起８１と係合する状態で、本体ケース１の前壁と左右側壁の外面開口縁に沿って配置し、本体ケース１と前カバー１２とで上下動のみ自在に摺動案内する。詳しくは、本体ケース１の前壁（内壁）１ａと前カバー１２の上側壁部（外壁）１２ａの左右に設けたガイド部７８とで枠基部６６を前後に挟んで、枠基部６６が内壁１ａに沿って上下摺動できるようにし、さらに、前記内壁１ａに突設した左右一対のリブ７１（図９および図１１参照）で、切欠６９の垂直の縦側縁７２を案内して、枠体６１が左右に傾動するのを規制している。上下摺動時には、傾斜壁６５が内壁１ａの両側に位置する部分円弧状のコーナー部７９で受け止められており、このことも枠体６１が左右に傾動するのを規制することに役立っている。先のリブ７１は外壁１２ａの内面に接当して、内壁１ａと外壁１２ａとの間隔を一定に保持している。
【００４０】
操作具６２は、左右横長のスライドノブからなり、外壁１２ａに設けたスライド溝７４に沿って左右スライドできる。カム構造６３は、操作具６２の内面に配置されて、回転自在に軸支した筒状のローラー７５と、先の枠基部６６に設けたカム部６８とからなる。図７に示すようにローラー７５は操作具６２の内面に設けた爪６２ａで回転自在に係合保持されており、その周面の段部がスライド溝７４の開口内縁と接当して、操作具６２を脱落不能に保持している。前カバー１２に操作具６２を組み付けた状態において、ローラー７５の周面はカム部６８と交差し、さらに内壁１ａの上縁に設けたガイド凹部７６で受け止められている。つまり、操作具６２は、前カバー１２の前面と、スライド溝７４と、ガイド凹部７６の三者で直接、あるいはローラー７５を介して間接的に案内支持されている。
【００４１】
カム部６８は、階段状に形成してあり、図１１に示すように常態においては下側の段部６８ａにローラー７５が嵌り込んでおり、このとき突起８１は溝６４の上端に位置している。この状態から操作具６２を、図１２に示すように、図に向かって右側へスライド操作すると、枠体６１がばね３１の付勢力に逆らって押し下げ操作され、上側の段部６８ｂがローラー７５で受け止められて、上昇不能に保持される。つまり、かみそりヘッド２は、全浮動が可能な浮動位置Ｒ１（図１１および図５に示す状態）と、浮動動作が規制された規制位置Ｒ２（図１２および図１３に示す状態）とに切り換えられる。因みに、この実施例におけるかみそりヘッド２は、浮動位置Ｒ１において約４mm下降移動できるが、規制位置Ｒ２においては、下降ストロークが1.５mmに規制される。かみそりヘッド２を全浮動ストローク分だけ押し込んだ状態においてはばね３１が全圧縮されるので、それ以上かみそりヘッド２を下降操作できない。このとき、突起８１は溝６７の下端と僅かな隙間を介して対向している。
【００４２】
電気かみそりの使用時には、肌やひげの状態に応じて操作具６２をソフト位置とハード位置のいずれかに切り換えて、かみそりヘッド２の押し下げ反力を硬軟いずれかに設定する。例えば、普通にひげそりを行う場合には、操作具６２をソフト位置に位置させて、かみそりヘッド２を全浮動できるようにし、かみそりヘッド２の沈み込みを容易化して肌に密着しやすくする。また、深ぞりを行う場合には、操作具６２をハード位置へスライド操作してかみそりヘッド２の押し下げ反力を大きくすることによって、深ぞりできるようにする。規制位置Ｒ２においては、ばね３１が圧縮された状態でかみそりヘッド２を位置保持するので、より小さな押し付け力でかみそりヘッド２を肌に強く押し付けることができ、その結果、深ぞりできるのである。このとき、腕部６４の下端は本体ケースで下降不能に受け止められている。
【００４３】
上記の実施例では、かみそりヘッド２を全浮動ストローク分だけ押し込んだ状態においてばね３１が全圧縮されることとしたが、ばね３１の全圧縮ストロークは、かみそりヘッド２の全浮動ストロークより大きく設定することができる。この場合には、図１４に想像線で示すように、浮動位置Ｒ１において、かみそりヘッド２を溝６７の上下長さ分だけ押し下げできるのはもちろん、規制位置Ｒ２においてもかみそりヘッド２を溝６７の上下長さ分だけ押し下げできるように構成することができる。このように切換機構Ｒは、浮動位置Ｒ１と規制位置Ｒ２との浮動ストロークを一致させて、ばね３１の反力のみを大小に切り換える形態を取ることができる。
【００４４】
上記のように浮動位置Ｒ１と規制位置Ｒ２との浮動ストロークを一致させる場合には、図１５に示すように、カム部６８を溝状に形成して、操作具６２を規制位置側へ切り換えた状態において、ローラー７５をカム部６８の上下の溝内縁で受け止めて、枠体６１を上下動不能にロック保持できるようにすることができる。この場合には、先の実施例で説明したように、腕部６４の下端を本体ケース１で受け止め規制する必要はない。
【００４５】
上記の実施例では、操作具６２を前カバー１２で左右スライド自在に支持したので、その左右動作を上下動作に変換する必要上、操作具６２と枠体６１との間にカム構造６３を設けたが、操作具６２を上下方向へ切り換え操作する場合には、カム構造を省略することができる。ただし、この場合には、操作具６２を規制位置Ｒ２に位置保持するための構造を付加する必要があり、例えば操作具６２と本体ケース１との間に節動機構や位置ロック機構などを設けて、かみそりヘッド２がばね３１で浮動位置Ｒ１に押し戻されるのを阻止できるようにする。操作具６２は左右または上下スライドする以外に、押しボタン状にあるいは回転ダイヤル状等に構成することができる。
【００４６】
上記の実施例では、突起８１を脚片８０に設け、突起８１と係合する溝（係合部）６７を枠体６１の腕部６４に設けたが、突起８１を腕部６４に設け、溝６７を脚片８０に設けることができる。また、枠体６１の腕部６４に設ける係合部６７は、必ずしも溝である必要はなく、切欠や凹部であってもよく、要はかみそりヘッド２の下降移動を許す状態で、脚片８０と枠体６１とが連結してあればよい。切換機構Ｒは、規制位置Ｒ２において、かみそりヘッド２を下降不能にロック保持できるように構成することができ、必要があれば浮動位置Ｒ１において、かみそりヘッド２を下降不能にロック保持する構造であってもよい。
【００４７】
枠体６１に設けるカム部６８は、２段以上、３段でも４段でも必要な段数に形成することができる。枠体６１はカム構造６３以外に、揺動レバーで下降操作できる。カム構造６３は、溝カムや板カム等をカム要素にして構成することができる。枠体６１は本体ケース１の内面に配置することができる。成形パッキン１５は膜状である必要はなく、ブロック状に形成してあってもよい。本発明は内刃９が一個のみ設けてある電気かみそりや、内刃が縦軸まわりに回転する電気かみそりにも適用できる。かみそりヘッド２の内刃支持台２４および内刃フレーム２５は、ヘッドフレーム２３で首振り不能に支持してあってもよい。本発明は、レシプロ式の内刃を備えた電気かみそりにも適用できる。
【図面の簡単な説明】
【図１】かみそりヘッドと切換機構の関係構造を示す概略正面図である。
【図２】電気かみそりの正面側の斜視図である。
【図３】本体ケースのみを断面した分解正面図である。
【図４】かみそりヘッドの分解正面図である。
【図５】かみそりヘッドの縦断正面図である。
【図６】ギヤ伝動機構を示す断面図である。
【図７】かみそりヘッドの縦断側面図である。
【図８】巻掛伝動機構の側面図である。
【図９】切換機構の分解斜視図である。
【図１０】図５におけるＡ−Ａ線断面図である。
【図１１】かみそりヘッドを浮動位置に切り換えた状態の概略正面図である。
【図１２】かみそりヘッドを規制位置に切り換えた状態の概略正面図である。
【図１３】かみそりヘッドを規制位置に切り換えた状態の縦断正面図である。
【図１４】切り換え構造の別実施例を示す説明図である。
【図１５】切り換え構造の更に別実施例を示す正面図である。
【符号の説明】
１本体ケース
２かみそりヘッド
１５成形パッキン
２２モーター台
３１ばね（弾性材）
６１枠体
６２操作具
６３カム構造
６４脚部
６６枠基部
６７溝（係合部）
６８カム部
Ｒ切換機構[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric razor in which a razor head is supported in a floating manner with respect to a main body case.
[0002]
[Prior art]
This type of electric razor is known, for example, from Japanese Patent Application Laid-Open No. 2000-14943. There, a motor is provided integrally with the razor head, and the entire razor head is supported so as to be floatable with respect to the case body by a spring. The case body and the motor case are sealed with a waterproof seal.
[0003]
[Problems to be solved by the invention]
As described above, according to the electric razor in which the razor head is supported in a floating manner, the followability of the outer blade to the skin can be increased to obtain a smooth feel and the skin is hardly damaged. But it is not without problems. In this type of electric razor, the razor head floats and sinks while being in close contact with the skin, so that it is difficult to use when deepening a relatively short beard. In detail, when deepening, it is necessary to keep pressing the razor head strongly against the skin against the elasticity of the spring, but although it is a little, an extra pressing force is required for the repulsive force of the spring, There is room for improvement in usability. In addition, since the razor head floats and sinks in close contact with the skin, when shaving long beards or comb hairs, the comb hairs or long beards are pushed down along the skin, making it impossible to cut the beard effectively. is there.
[0004]
In the present invention, in order to solve the above-mentioned problems peculiar to the electric razor in which the razor head is supported in a floating manner, it is considered to suppress the floating operation of the razor head. With regard to this type of characteristic change, Japanese Patent Laid-Open No. 62-172987 discloses that the basic structure of an electric razor is different, but the amount of protrusion of a unit for cutting a beard can be changed. There, a unit for beard cutting is composed of a beveled outer blade and an inner blade that rotates on the inner surface of the upper wall of the outer blade. The unit characteristics are changed according to personal preference.
[0005]
The object of the present invention is to make it possible to change the pressing reaction force by switching the floating state of the razor head in an electric razor that supports the razor head in a floating manner, and therefore always responds to the user's beard, skin condition, etc. The object is to provide an electric shaver that can be shaved easily. Another object of the present invention is to provide a shaving mechanism capable of smoothly switching the floating state of a razor head, simplifying its structure, and providing an electric razor equipped with a switching mechanism at a lower cost. is there. Another object of the present invention is to make the switching mechanism compact and to reduce the size of the electric razor accordingly. Another object of the present invention is to provide an electric razor capable of optimizing the arrangement form of the switching mechanism to easily switch the floating state of the razor head and to float and support the razor head in the front-rear or left-right direction. It is in. Another object of the present invention is to provide a highly reliable electric razor that can smoothly guide and support each of the structural members of the switching mechanism and can always switch the floating state of the razor head in a stable state. It is in.
[0006]
[Means for Solving the Problems]
In the electric razor according to the present invention, a razor head 2 provided on an upper portion of a main body case 1 is supported by an elastic material 31 so as to float up and down with respect to the main body case 1. A switching mechanism R is provided between the main body case 1 and the razor head 2 so as to switch the vertical position of the razor head 2 and change the pressing reaction force of the razor head 2 by the elastic material 31 into a plurality of stages.
[0007]
The switching mechanism R includes an operation tool 62 provided on the outer surface of the main body case 1 and a frame body 61 that is disposed on the main body case 1 and can move up and down. By switching the frame 61 up and down with the operation tool 62, the razor head 2 is moved to the normal floating position R1, and at least one restricting position R2 in which the reaction force of the razor head 2 by the elastic material 31 is increased. Can be operated up and down.
[0008]
The switching mechanism R includes an operation tool 62 provided on the outer surface of the main body case 1 and a frame body 61 that is disposed on the main body case 1 and can move up and down. The frame 61 is switched up and down with the operation tool 62, and the razor head 2 is operated up and down to a floating position R1 that allows full floating and at least one restricting position R2 that restricts floating operation.
[0009]
A pair of leg pieces 80 provided with protrusions 81 are provided to project from the lower part of the motor base 22 constituting the razor head 2. The frame body 61 is integrally provided with a pair of arm portions 64 including an engaging portion 67 that engages with the protrusion 81 and a frame base portion 65 that connects the arm portions 64 to each other. The frame body 61 and the operation tool 62 guided and supported by the main body case 1 so as to be slidable to the left and right are connected via a cam structure 63 that converts the left / right sliding motion of the operation tool 62 into a vertical motion.
[0010]
The elastic material includes a spring 31 that floats and supports the razor head 2 and a molded packing 15 that seals between the main body case 1 and the razor head 2 in a watertight manner.
[0011]
The frame body 61 is slidably guided along the inner surfaces of the front wall and the left and right side walls of the main body case 1 so as to move up and down. A pair of left and right leg pieces 80 provided on both lower sides of the motor base 22 and a pair of left and right arm portions 64 of the frame body 61 are connected to each other through a protrusion 81 and a groove 67 positioned at the front and rear center of the razor head 2. Thus, the razor head 2 can be floated in the front-rear and left-right directions.
[0012]
The cam structure 63 includes a roller 75 that is rotatably supported on the inner surface of the operation tool 62, and a cam portion 68 that is provided on the frame base portion 66 and is pushed down by the roller 75.
[0013]
The frame 61 is made of a press-molded product made of a metal plate material, and a stepped cam portion 68 is formed on the frame base 66.
[0014]
A frame body 61 is accommodated between inner and outer walls 1a and 12a provided on the front surface of the main body case 1, and the frame body 61 is guided and supported so as to be slidable up and down. The operating tool 62 arranged on the outer surface of the outer wall 12a is guided and supported by a slide groove 74 provided on the outer wall 12a and a guide recess 76 for the roller 75 provided on the inner wall 1a so as to be slidable in the left-right direction.
[0015]
A rib that contacts one of the inner and outer walls 1a and 12a provided on the front surface of the main body case 1 with the other wall to maintain a constant spacing between the walls 1a and 12a. 71 Is provided. This rib 71 Then, the frame body 61 is slidably guided so as not to move left and right.
[0016]
[Effects of the invention]
In the present invention, the floating state of the razor head 2 that is floatingly supported is switched by the switching mechanism R, and the vertical position thereof is changed to a plurality of stages, so that the razor head 2 is pushed down according to the length of the beard, the state of the skin, and the like. The reaction force can be changed to multiple stages. Therefore, according to the electric razor of the present invention, when the pressing reaction force of the razor head 2 is reduced, the outer blade 10 is softly pressed against the skin when the razor head 2 is pressed against the skin. Can relieve skin stress. Further, when the razor head 2 is switched by the switching device R and the reaction force for pressing down the razor head 2 is set to a large value, the sinking operation of the razor head 2 can be restricted, so that when the razor head 2 is pressed against the skin, The outer blade 10 can be pressed closer to the skin and brought into intimate contact, thus enabling deep sledge. In order to change the pressing reaction force of the razor head 2 into a plurality of stages, there are a state in which full floating is allowed, a state in which the razor head 2 is lowered to the whole or halfway of the full floating stroke, and the state is maintained. Both the razor head 2 and a state where the razor head 2 is locked so as not to move at an arbitrary position are included.
[0017]
According to the electric razor, the razor head 2 can be moved up and down by the switching mechanism R to the normal floating position R1 and at least one restricting position R2 in which the reaction force of the razor head 2 by the elastic material 31 is increased. At the position R2, the pressing reaction force of the razor head 2 can be increased, and the outer blade 10 can be pressed tightly against the skin and brought into close contact to deepen. It should be noted that, in the state where the pressing reaction force of the razor head 2 is increased, the razor head 2 is lowered to the whole floating stroke or halfway to maintain the state, and the razor head 2 cannot be moved at an arbitrary position. In the locked state.
[0018]
A switching mechanism R is constituted by the frame body 61 and the operation tool 62 provided in the main body case 1, and the frame body 61 is switched up and down by the operation tool 62 so that the razor head 2 is at least one in the floating position R1. According to the electric razor operated up and down to the restriction position R2, the structure of the switching mechanism R can be simplified and the manufacturing cost can be reduced.
[0019]
The left / right sliding motion of the operation tool 62 guided and supported by the main body case 1 is converted into the vertical motion of the frame body 61 via the cam structure 63, and a pair of leg pieces 80 provided at the lower part of the motor base 22 by the frame body 61 are provided. According to the switching mechanism R that performs the lowering operation via the protrusion 81, when the razor head 2 is operated to be lowered, the operating force of the frame body 61 can be transmitted at two opposite positions on the peripheral surface thereof, so that the razor is stable. The floating state of the head 2 can be switched, for example, the razor head 2 in the middle of the switching operation can be tilted and the operation failure such as being caught on the main body case 1 can be cleared, and the operation tool 62 can be simply switched to the left and right. With this operation, the razor head 2 can be switched between the floating position R1 and the restriction position R2.
[0020]
In addition to the elastic force of the spring 31 that floats and supports the razor head 2, the razor head 2 is floated and supported by using the elasticity of the molded packing 15 that seals the space between the main body case 1 and the razor head 2 in a watertight manner. Compared to the case where the razor head 2 is supported only by the spring 31, the reaction force characteristic when the razor head 2 sinks can be optimized. Although the tension characteristic of the spring 31 changes linearly, in the case of the molded packing 15, the deformation stress increases rapidly as the amount of deflection increases, and the deformation stress changes into a quadratic curve. Therefore, as the submerged stroke of the razor head 2 increases, the pressing reaction force can be increased, and the followability of the razor head 2 with respect to the skin can be improved and smooth shaving can be performed.
[0021]
According to the switching mechanism R that arranges the frame body 61 along the inner surfaces of the front wall and the left and right side walls of the main body case 1 and connects the grooves 67 provided in the pair of arm portions 64 to the pair of left and right leg pieces 80, Since the razor head 2 that can float up and down can be supported so as to float in the front-rear and left-right directions around the protrusion 81, the razor head 2 can follow the skin and can perform smooth shaving. In many cases, since the left and right width of the main body case 1 is set to be larger than the front and rear width, the length of the arm portion 64 is made shorter than the case where the front and rear of the razor head 2 are moved down by the frame body 61. The moment acting on 66 can be minimized, and the frame body 61 can be made thinner and smaller correspondingly, and the switching mechanism R can be made compact.
[0022]
According to the cam structure 63 constituted by a rotatable roller 75 pivotally supported on the inner surface of the operation tool 62 and a cam portion 68 operated to be pushed down by the roller 75, the roller 75 rotating along with the operation tool 62 is used. Since the frame body 61 can be pushed down via the cam portion 68, the frame body 61 can be switched with ease and lightly with a smaller operating force, and there is no need to provide a position holding structure such as a lock mechanism. Since 2 can be held at the restriction position R2, the structure of the switching mechanism R can be simplified accordingly.
[0023]
According to the switching mechanism R in which the stepped cam portion 68 is formed on the frame base portion 66 of the frame body 61 made of a press-formed product, the switching of the position between the floating position R1 and the restricting position R2 is clarified. The position of the razor head 2 can be prevented from being held at the position, and the current switching state can be confirmed simply by glanceping the razor head 2.
[0024]
The frame body 61 is guided and supported by the inner and outer walls 1a and 12a provided on the front surface of the main body case 1 so as to be slidable up and down, and the operation tool 62 is provided with a slide groove 74 provided on the outer wall 12a and a guide for a roller 75 provided on the inner wall 1a. According to the switching device R that guides and supports the concave portion 76 so as to be slidable to the left and right, the forward / backward swing of the frame 61 at the time of the switching operation is restricted by the inner and outer walls 1a and 12a. 76 can be slid and guided to the left and right, and the switching operation of the switching mechanism R can be smoothed.
[0025]
Ribs provided on one of the inner and outer walls 1a and 12a 71 Thus, according to the case structure in which the facing distance from the other wall is kept constant, even when an external force acts on the outer wall 12a, the facing distance between the inner and outer walls 1a and 12a is kept constant, and the frame body 61 can be slidably guided up and down in a stable state, and therefore the switching operation of the switching mechanism R can be smoothed.
[0026]
Tip rib 71 By restricting the movement of the frame body 61 so that it can only move left and right, the frame body 61 is prevented from moving up and down while tilting, and the left and right arm portions 64 can be moved downward evenly. It can be smoothed.
[0027]
【Example】
1 to 13 show an embodiment of a water-washing type electric shaver according to the present invention. 2 to 5, the electric razor has a main body case 1 and a razor head 2 provided on the upper part thereof, a vertically long display panel 3 is provided on the front surface of the main body case 1, and a motor starting switch is provided above and below the main body case 1. A button 4, a mode switching button 5 for switching the operation mode, an indicator lamp 6 for displaying the switching state of both buttons 4 and 5, and the like are provided. Above the display panel 3, an operation tool is slidable left and right. On the rear surface of the main body case 1, there are provided a sliding blade 7 and a slide knob 8 for raising and lowering the sliding blade 7. The razor head 2 is provided with a pair of front and rear inner blades 9 and outer blades 10 and a center blade 11.
[0028]
The main body portion below the razor head 2 has a deformed cylindrical main body case 1 whose upper and lower ends are opened, an electrical component unit 13 that is inserted and loaded into the inside from the upper surface side, and a bottom case 14 that is assembled from the lower surface side of the case. The razor head 2 is fixed to the upper part of the electrical component unit 13 via the molded packing 15.
[0029]
The electrical component unit 13 is loaded in the main body case 1, the electrical component unit 13 and the bottom case 14 fitted in the main body case 1 are fastened with screws, and the molded packing 15 is brought into close contact with the inner surface of the main body case 1, Further, by sealing the fastening portion on the bottom case 14 side with an O-ring or packing, water entry into the main body case 1 is prevented, and the razor head 2 can be washed with water. The electrical component unit 13 is formed by assembling a motor 17, a secondary battery 18, a switch, an LED, a circuit board 19 on which electronic components and the like are mounted on a plastic molded inner frame 16. A watertight packing 20 is provided on the output shaft 17 a of the motor 17. As shown in FIG. 9, a longitudinally long opening 12b is opened on the front surface of the front cover 12, and the previous display panel 3 is exposed from the opening 12b to the outer surface of the cover.
[0030]
In FIG. 4, the razor head 2 includes a motor base 22 to which the motor 1 is fixed, a head frame 23 formed in a reverse portal shape, an inner blade support base 24, an inner blade frame 25, and an outer blade holder 26. These are composed of a large number of parts assembled in the outer shell. The inner cutter 9 is assembled to the inner cutter frame 25, and the outer cutter 10 and the center cutter 11 are assembled to the outer cutter holder 26, respectively. A first transmission chamber 27 is defined in the lower part of the razor head 2, and a second transmission chamber 28 is defined on one side thereof. Both transmission chambers 27 and 28 are partitioned in a sealed manner by a partition wall 29 as will be described later.
[0031]
The motor base 22 is formed of a frame body having an upper surface surrounded by front and rear walls and left and right walls, and a motor 17 and a motor holder 30 are fixed to the lower surface of the frame. A pair of left and right leg pieces 80 project from the front and rear centers of the lower portions of both sides of the motor base 22, and a projection 81 is formed on the outer surface of the projecting end. As will be described later, the floating state of the razor head 2 is restricted via the leg piece 80. As shown in FIG. 5, the motor holder 30 that is externally fitted and fixed to the lower half of the motor 17 is supported so as to be movable up and down with respect to the inner frame 16, and further includes a spring 31 (elastic material) comprising a pair of left and right compression coil springs. ). That is, the entire razor head 2 is supported so as to be able to float in the front-rear, left-right, and up-down directions with respect to the main body case 1 via the inner frame 16, and in order to allow these movements, Floating gaps are provided between the frames 16 and between the main body case 1 and the razor head 2. The motor base 22 and the motor holder 30 are hermetically sealed with the previous molding packing 15, and this molding packing 15 also functions as an elastic material for floatingly supporting a part of the weight of the razor head 2. .
[0032]
The head frame 23 has a case portion 32 that opens downward, and side walls 33 that are erected on both the left and right sides of the case portion 32, and the case portion 32 is bonded and fixed to the motor base 22 in a cover-like manner. A first transmission chamber 27 is defined between the joining surfaces of 22 and 32. In this joined state, the side wall 33 and the partition wall 29 are flush with each other, and the second transmission chamber 28 is defined by both of them 29 and 33 and the cover 34 that is put on them. The cover 34 is detachably engaged and fixed to the side wall 33. The right cover 35 is provided with a release button 36 for unlocking the outer blade holder 26.
[0033]
In FIG. 4, the inner blade support 24 includes a base 24a having a section that opens upward, a pair of left and right arms 24b erected from both left and right ends, and a lid 24c that closes the upper surface opening of the base 24a. Become. By supporting the shafts provided on the left and right arms 24b on the upper portion of the side wall 33 of the head frame 23, the inner blade support base 24 is pivotally supported so that it can swing back and forth, that is, swingable relative to the head frame 23. The An inner blade frame 25 described later is detachably press-fitted and engaged between the pair of arms 24b. Inside the pedestal base 24a, there are provided a lock mechanism for locking the outer blade holder 26 that is externally fitted to the inner blade support base 24 so that it cannot be removed and a vibrator 50 for the center blade.
[0034]
The inner blade frame 25 has a base wall 38 and a pair of side walls 39 erected on both left and right ends of the base wall 38, and a pair of front and rear inner blades 9 are rotatably supported between the upper ends of both side walls 39. is doing. A small-diameter inner blade gear 40 is fixed to the left inner blade shaft toward FIG. 4, and this gear 40 meshes with a passive gear 41 provided on the inner blade frame 25, so that the motor power can be transmitted to the front and rear. The information is transmitted to the inner blade 9 at the same time. In order to clean the inner blades, a rotating brush 42 is disposed below each inner blade 9, and the left and right ends thereof are rotatably supported by slide pieces assembled to the side walls 39. The inner blade frame 25 is engaged and mounted on the inner blade support base 24 from above.
[0035]
The power of the motor 17 is first transmitted sideways through the gear group G accommodated in the first transmission chamber 27 and then upward by the winding transmission mechanism accommodated in the second transmission chamber 28. And transmitted to the pair of front and rear inner blades 9 through the inner blade gear 40. In FIG. 6, the gear group G includes four spur gears G <b> 1 to G <b> 4 that decelerate and transmit motor power, an intermediate shaft 44 that is horizontally supported by the partition wall 29, and a final gear G <b> 4 of the gear group G. It is comprised with a pair of bevel gears 45 and 46 provided in. Both ends of the intermediate shaft 44 protrude into the first and second transmission chambers 27 and 28, the passive bevel gear 46 is fixed to one end thereof, and the driving pulley 52 of the winding transmission mechanism is fixed to the other end. To do. In order to prevent the gear noise generated from the gear group G from being transmitted through the first transmission chamber 27 to the second transmission chamber 28, the space between the chambers 27 and 28 is partitioned in a sealed manner by a partition wall 29. . Two eccentric cams (rotary drive bodies) 47 and 48 are provided on the upper part of the first stage spur gear G1 fixed to the output shaft 17a of the motor 17, and the vibrators for the slanting blades can be formed by these eccentric cams 47 and 48. 49 and the center blade vibrator 50 can be reciprocated simultaneously.
[0036]
As shown in FIG. 8, the winding transmission mechanism includes a driving pulley 52 fixed to the intermediate shaft 44, a driven pulley 54 fixed to the final gear shaft 53, and a timing belt 55 wound around both pulleys 52 and 54. The tension body 56 is arranged outside the slack side transition locus of the timing belt 55. The tension body 56 can swing back and forth around a shaft 57 and is urged to swing counterclockwise by a spring 58, so that the roller 59 at the tip is circumscribed by the timing belt 55.
[0037]
As described above, the razor head 2 is supported so as to be able to float with respect to the main body case 1. In order to restrict this floating operation, the razor head 2 is interposed between the razor head 2 and the main body case 1. A switching mechanism R for switching the floating strokes is provided. In FIG. 9, the switching mechanism R moves the frame body 61 disposed between the main body case 1 and the front cover 12, the operation tool 62 disposed on the front upper portion of the front cover 12, and the left / right sliding operation of the operation tool 62 up and down. And a pair of left and right leg pieces 80 that inherit the operation of the frame body 61.
[0038]
In FIG. 9, the frame body 61 is formed of a stainless steel press fitting that integrally includes a pair of left and right arm portions 64 and a frame base portion 66 that connects both arm portions 64 with each other through an inclined wall 65. Each arm portion 64 is provided with a vertically long groove (engaging portion) 67 that engages with the protrusion 81 of the previous leg piece 80. A cam portion 68 is formed at the central upper edge of the frame base portion 66, and a downward notch 69 is formed at the lower edge thereof.
[0039]
As shown in FIGS. 9 and 10, the frame body 61 extends along the outer surface opening edges of the front wall and the left and right side walls of the main body case 1 with the groove 67 of the arm portion 64 engaged with the protrusion 81 of the leg piece 80. The main body case 1 and the front cover 12 are slidably guided only up and down. Specifically, the frame base 66 is sandwiched between the front wall (inner wall) 1a of the main body case 1 and the guide portions 78 provided on the left and right of the upper side wall (outer wall) 12a of the front cover 12, and the frame base 66 is connected to the inner wall 1a. In addition, a pair of left and right ribs 71 (see FIGS. 9 and 11) projecting from the inner wall 1a are used to guide the vertical vertical edge 72 of the notch 69, so that the frame body 61 restricts tilting left and right. When sliding up and down, the inclined wall 65 is received by the partial arc-shaped corner portions 79 located on both sides of the inner wall 1a, which also helps to restrict the frame body 61 from tilting left and right. The previous rib 71 is in contact with the inner surface of the outer wall 12a and keeps the distance between the inner wall 1a and the outer wall 12a constant.
[0040]
The operation tool 62 is composed of a horizontally long slide knob, and can slide to the left and right along a slide groove 74 provided on the outer wall 12a. The cam structure 63 includes a cylindrical roller 75 that is disposed on the inner surface of the operation tool 62 and is rotatably supported, and a cam portion 68 provided on the frame base 66. As shown in FIG. 7, the roller 75 is rotatably held by a claw 62 a provided on the inner surface of the operation tool 62, and the step portion of the peripheral surface contacts the inner edge of the opening of the slide groove 74 to operate The tool 62 is held so as not to fall off. In a state where the operation tool 62 is assembled to the front cover 12, the circumferential surface of the roller 75 intersects with the cam portion 68, and is further received by a guide recess 76 provided on the upper edge of the inner wall 1a. In other words, the operation tool 62 is supported and supported directly by the front surface of the front cover 12, the slide groove 74, and the guide recess 76 or indirectly via the roller 75.
[0041]
The cam portion 68 is formed in a step shape, and as shown in FIG. 11, the roller 75 is normally fitted into the lower step portion 68a. At this time, the protrusion 81 is positioned at the upper end of the groove 64. Yes. When the operation tool 62 is slid to the right as shown in FIG. 12 from this state, the frame body 61 is pushed down against the urging force of the spring 31, and the upper step 68 b is moved by the roller 75. Received and held incapable of ascending. That is, the razor head 2 is switched between the floating position R1 (the state shown in FIGS. 11 and 5) in which the razor head can be fully floated and the restriction position R2 (the state shown in FIGS. 12 and 13) where the floating operation is restricted. . Incidentally, the razor head 2 in this embodiment can move downward by about 4 mm at the floating position R1, but the downward stroke is restricted to 1.5 mm at the restriction position R2. In the state where the razor head 2 is pushed in for the entire floating stroke, the spring 31 is fully compressed, so that the razor head 2 cannot be further lowered. At this time, the protrusion 81 faces the lower end of the groove 67 with a slight gap.
[0042]
When the electric razor is used, the operating tool 62 is switched between the soft position and the hard position according to the state of the skin and the beard, and the pressing reaction force of the razor head 2 is set to either hard or soft. For example, when shaving normally, the operation tool 62 is positioned at the soft position so that the razor head 2 can be fully floated, and the razor head 2 can be easily submerged to easily adhere to the skin. In addition, when deepening, the operation tool 62 is slid to the hard position to increase the pushing-down reaction force of the razor head 2 so that deepening can be performed. In the restricting position R2, the razor head 2 is held in a state where the spring 31 is compressed, so that the razor head 2 can be strongly pressed against the skin with a smaller pressing force, and as a result, the razor head 2 can be deepened. At this time, the lower end of the arm portion 64 is received by the main body case so as not to be lowered.
[0043]
In the above embodiment, the spring 31 is fully compressed in a state in which the razor head 2 is pushed in by the entire floating stroke. However, the total compression stroke of the spring 31 is set larger than the total floating stroke of the razor head 2. be able to. In this case, as shown by an imaginary line in FIG. 14, the razor head 2 can be pushed down by the vertical length of the groove 67 at the floating position R 1, and the razor head 2 can be pushed at the groove 67 at the restricting position R 2. It can be configured so that it can be pushed down by the vertical length. Thus, the switching mechanism R can take a form in which only the reaction force of the spring 31 is switched between large and small by matching the floating strokes of the floating position R1 and the restricting position R2.
[0044]
As described above, when the floating strokes of the floating position R1 and the restriction position R2 are made to coincide, as shown in FIG. 15, the cam portion 68 is formed in a groove shape, and the operation tool 62 is switched to the restriction position side. In this state, the roller 75 can be received by the upper and lower groove inner edges of the cam portion 68 so that the frame body 61 can be locked and held so as not to move up and down. In this case, as described in the previous embodiment, it is not necessary to receive and restrict the lower end of the arm portion 64 with the main body case 1.
[0045]
In the above embodiment, since the operation tool 62 is supported by the front cover 12 so as to be slidable in the left and right directions, the cam structure 63 is provided between the operation tool 62 and the frame 61 in order to convert the left and right movements into vertical movements. However, the cam structure can be omitted when the operation tool 62 is switched in the vertical direction. However, in this case, it is necessary to add a structure for holding the operation tool 62 at the restricting position R2. For example, a movement mechanism or a position lock mechanism is provided between the operation tool 62 and the main body case 1. Thus, the razor head 2 can be prevented from being pushed back to the floating position R1 by the spring 31. In addition to sliding left and right or up and down, the operation tool 62 can be configured as a push button or a rotary dial.
[0046]
In the above embodiment, the protrusion 81 is provided on the leg piece 80 and the groove (engagement portion) 67 that engages with the protrusion 81 is provided on the arm portion 64 of the frame body 61, but the protrusion 81 is provided on the arm portion 64, A groove 67 can be provided in the leg piece 80. Further, the engaging portion 67 provided on the arm portion 64 of the frame body 61 does not necessarily have to be a groove, and may be a notch or a recess. In short, the leg piece 80 is allowed in a state in which the razor head 2 is allowed to move downward. And the frame 61 may be connected. The switching mechanism R can be configured to be able to lock and hold the razor head 2 so that the razor head 2 cannot be lowered at the restricting position R2. If necessary, the switching mechanism R is configured to lock and hold the razor head 2 so that it cannot be lowered at the floating position R1. May be.
[0047]
The cam portion 68 provided on the frame body 61 can be formed in two or more steps, a required number of steps, such as three steps or four steps. In addition to the cam structure 63, the frame body 61 can be lowered by a swing lever. The cam structure 63 can be configured using a groove cam, a plate cam, or the like as a cam element. The frame body 61 can be disposed on the inner surface of the main body case 1. The molded packing 15 need not be in the form of a film, and may be formed in a block shape. The present invention can also be applied to an electric razor in which only one inner blade 9 is provided, and an electric razor in which the inner blade rotates about the vertical axis. The inner blade support 24 and the inner blade frame 25 of the razor head 2 may be supported by the head frame 23 so as not to swing. The present invention can also be applied to an electric razor having a reciprocating inner blade.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a relational structure between a razor head and a switching mechanism.
FIG. 2 is a front perspective view of an electric razor.
FIG. 3 is an exploded front view in which only a main body case is sectioned.
FIG. 4 is an exploded front view of a razor head.
FIG. 5 is a longitudinal front view of a razor head.
FIG. 6 is a cross-sectional view showing a gear transmission mechanism.
FIG. 7 is a vertical side view of a razor head.
FIG. 8 is a side view of the winding transmission mechanism.
FIG. 9 is an exploded perspective view of the switching mechanism.
10 is a cross-sectional view taken along line AA in FIG.
FIG. 11 is a schematic front view of a state in which the razor head is switched to a floating position.
FIG. 12 is a schematic front view of a state in which the razor head is switched to a restriction position.
FIG. 13 is a longitudinal front view of a state in which the razor head is switched to a restriction position.
FIG. 14 is an explanatory diagram showing another embodiment of the switching structure.
FIG. 15 is a front view showing still another embodiment of the switching structure.
[Explanation of symbols]
1 Body case
2 Razor head
15 Molded packing
22 Motor stand
31 Spring (elastic material)
61 Frame
62 Operation tool
63 Cam structure
64 legs
66 Frame base
67 Groove (engagement part)
68 Cam
R switching mechanism

Claims

The razor head 2 provided on the upper part of the main body case 1 is an electric razor supported by the elastic material 31 so as to be able to float up and down with respect to the main body case 1,
Between the main body case 1 and the razor head 2, by switching the vertical position of the razor head 2, Ri Oh and switching mechanism R is provided to change the reaction force pushing down the razor head 2 by the elastic member 31 in a plurality of stages,
The switching mechanism R includes an operation tool 62 provided on the outer surface of the main body case 1 and a frame body 61 that is arranged on the main body case 1 and can move up and down.
By switching the frame 61 up and down with the operation tool 62, the razor head 2 is moved to the normal floating position R1, and at least one restricting position R2 in which the reaction force of the razor head 2 by the elastic material 31 is increased. Can be operated up and down,
A pair of leg pieces 80 provided with projections 81 are provided on the lower part of the motor base 22 constituting the razor head 2,
The frame body 61 is integrally provided with a pair of arm portions 64 including an engaging portion 67 that engages with the protrusion 81, and a frame base portion 66 that connects the arm portions 64 to each other.
The frame 61 and the operation tool 62 guided and supported by the main body case 1 so as to be slidable to the left and right are connected via a cam structure 63 that converts the left and right sliding operation of the operation tool 62 into a vertical operation. Electric razor.

The switching mechanism R includes an operation tool 62 provided on the outer surface of the main body case 1 and a frame body 61 that is arranged on the main body case 1 and can move up and down.
The razor head 2 can be operated up and down by switching the frame 61 up and down with the operation tool 62 to a floating position R1 that allows full floating and at least one restricting position R2 that restricts floating movement. The described electric razor.

3. The electric razor according to claim 2, wherein the elastic member comprises a spring 31 for floatingly supporting the razor head 2 and a molded packing 15 for sealing the space between the main body case 1 and the razor head 2 in a watertight manner.

The frame body 61 is slidably guided along the inner surfaces of the front wall and the left and right side walls of the main body case 1 so as to freely move up and down.
A pair of left and right leg pieces 80 provided on both lower sides of the motor base 22 and a pair of left and right arm portions 64 of the frame body 61 are connected via a protrusion 67 and a groove 67 positioned at the front and rear center of the razor head 2. The electric razor according to claim 1, 2 or 3, wherein the razor head 2 can float in the front-rear and left-right directions .

The cam structure (63) comprises a roller (75) rotatably supported on the inner surface of the operating tool (62) and a cam portion (68) provided on the frame base portion (66) and operated to be pushed down by the roller (75). Or the electric razor of 4 .

The electric shaver according to any one of claims 1 to 5, wherein the frame body 61 is made of a press-formed product made of a metal plate material, and a stepped cam portion 68 is formed on the frame base portion 66 .

The frame body 61 is accommodated between the inner and outer walls 1a and 12a provided on the front surface of the main body case 1, and the frame body 61 is supported and slidable up and down.
The operation tool 62 arranged on the outer surface of the outer wall 12a is guided and supported by a slide groove 74 provided on the outer wall 12a and a guide recess 76 for a roller 75 provided on the inner wall 1a so as to be slidable left and right. The electric razor as described in any one of .

A rib 71 is provided on one of the inner and outer walls 1a and 12a provided on the front surface of the main body case 1 so as to abut against the other wall and maintain a constant spacing between the walls 1a and 12a. The electric razor according to any one of 7 above.

The electric razor according to claim 8, wherein the frame body 61 is slidably guided by the rib 71 so as not to be movable left and right .