JP3942694B2

JP3942694B2 - Reciprocating electric razor inner blade and reciprocating electric razor

Info

Publication number: JP3942694B2
Application number: JP18353297A
Authority: JP
Inventors: 正樹岡部
Original assignee: Izumi Products Co
Current assignee: Maxell Izumi Co Ltd
Priority date: 1997-07-09
Filing date: 1997-07-09
Publication date: 2007-07-11
Anticipated expiration: 2017-07-09
Also published as: JPH1119344A

Description

【０００１】
【発明の属する技術分野】
本発明は、往復動式の電気かみそりの内刃とそれを用いた往復動式の電気かみそりに関する。
【０００２】
【従来の技術】
従来の往復動式電気かみそりの内刃について説明する。
最初に、一般的な往復動式電気かみそりの全体構成について図１９を用いて説明する。
電気かみそり１０は、薄い金属板を用いて形成されると共に、網目状の開口を有する網状外刃１２と、この外刃１２を湾曲した状態で保持する保持枠１４と、外刃１２の内面と接触しつつ往復動して髭を剃る内刃１６と、内部に電源部（本例では一例として電池）１８、電動モータ２０、表面にオン・オフスイッチ２２が取り付けられた本体ケース２４と、本体ケース２４の上面に設けられ、電動モータ２０の出力軸２６の回転運動を直線運動に変換して内刃１６を往復動させる駆動機構２８とから構成されている。また、保持枠１４は外刃１２を湾曲して保持した状態で、内刃１６を覆うように本体ケース２４の上面に着脱自在に取り付けできる。着脱機構は、一例として保持枠１４の両側面に設けられたフック片３０を本体ケース２４の上面の両側に設けられた係合溝３２に係合させるものである。
【０００３】
次に、内刃１６の詳細な構成について説明する。
内刃１６は対向して配された一対の支持壁部１６ａと、一対の支持壁部１６ａの上端間に掛け渡され、支持壁部１６ａの長手方向Ａに沿って複数並設された断面逆Ｕ字状の小刃１６ｂとから成る。
内刃１６の製造方法の一具体例は、金属板体を断面逆Ｕ字状に屈曲し、この金属板体の屈曲部Ｂに、屈曲部Ｂの長手方向Ａを横切るスリット１６ｃを間隔を空けて複数開口して、屈曲部Ｂにおいて残った逆Ｕ字状の薄肉部が小刃１６ｂとして形成される。また、金属板体の屈曲された先端側に位置する一対の延出部分Ｃ、すなわち屈曲部以外の部位は互いに対向する一対の支持壁部１６ａとして形成されている。
【０００４】
そして内刃１６の一対の支持壁部１６ａには、図１９に示すように内刃１６の形状を断面逆Ｕ字状に保持するための連結ピン３４や、また図２０に示すように電動モータ２０の出力軸２６に取り付けられて駆動機構２８の一部を構成する偏心ピン３６と係合するためのスリット３８が下面に設けられた合成樹脂製の連結ブロック４０等が取り付けられ、一対の支持壁部１６ａは相互に連結された状態となっている。
【０００５】
【発明が解決しようとする課題】
しかしながら、上記の従来の往復動式電気かみそりの内刃には次の様な課題が有る。
剃られた髭は逆Ｕ字状の内刃１６の内部に入り込み、本体ケース２４の上面に溜まる。
この髭の掃除をする場合には、本体ケース２４の上面に溜まった髭をブラシ等により払うと共に、内刃１６の内面、すなわち小刃１６ｂの内面や一対の支持壁部１６ａの対向する内面にも付着するために、この付着した髭もブラシで払う必要がある。
しかしながら、一対の支持壁部１６ａ間に取り付けられた上記連結ピン３４や連結ブロック４０が邪魔になってブラシを支持壁部１６ａに沿って移動させることができず、ブラシによる小刃１６ｂの内面および一対の支持壁部１６ａの対向する内面の清掃が行いにくく、清掃に時間がかかるという課題が生じていた。
【０００６】
従って、本発明は上記課題を解決すべくなされ、その目的とするところは、内刃内部の清掃を行いやすい往復動式電気かみそりの内刃と往復動式電気かみそりを提供することにある。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明に係る請求項１記載の往復動式電気かみそりの内刃は、対向して配された一対の支持壁部と、該一対の支持壁部の上端間に掛け渡され、支持壁部の長手方向に沿って複数並設された断面逆Ｕ字状の小刃とを具備し、駆動機構に着脱可能な往復動式電気かみそりの内刃において、前記一対の支持壁部間には、その長手方向の一端側から他端側にかけて前記小刃のみが掛け渡されていることを特徴とする。
この構成によれば、内刃の内面、すなわち小刃の内面や一対の支持壁部の対向する内面に付着した髭をブラシで払って清掃する場合に、全体として屈曲した外形を有する内刃の内部空間内でブラシを自由に移動させながら内刃の一端側から他端側にかけて連続して清掃できるために、従来のように連結ピンや連結ブロックがあった場合にはこれらが邪魔をしてブラシを当てにくかった部位も簡単、かつ確実に清掃が行える。
【０００８】
また、内刃の具体的な構造は、前記一対の支持壁部は、屈曲部が断面逆Ｕ字状となるように２つに屈曲形成された金属板体の対向する一対の延出部分で形成され、前記小刃は、前記屈曲部に屈曲部の長手方向を横切るスリットを間隔を空けて複数開口して形成され、前記一対の支持壁部のそれぞれの下端部が駆動機構と連結されている。
【０００９】
また、本発明に係る請求項３記載の往復動式電気かみそりの内刃は、対向して配された一対の支持壁部と、該一対の支持壁部の上端間に掛け渡され、支持壁部の長手方向に沿って複数並設された断面逆Ｕ字状の小刃とを具備する往復動式電気かみそりの内刃において、前記一対の支持壁部間には、その長手方向の一端側から他端側にかけて前記小刃および前記小刃と同じ断面形状であって前記小刃の厚さよりも肉厚に形成された連結アーチのみが並設して掛け渡されていることを特徴とする。
この構成によれば、一対の支持壁部間には小刃以外に連結アーチが掛け渡されているため、小刃のみの場合に比べて内刃全体の強度を向上させることができる。また、前記小刃と前記連結アーチとが一つの金属板体から製造されることを特徴とする。
【００１０】
また、前記一対の支持壁部と前記連結アーチは合成樹脂材料を用いて一体成形されると共に、前記小刃は前記一対の支持壁部間にインサート成形により取り付ける構造とすると、製造が容易に行え、また連結アーチにより内刃全体の強度の向上も図れる。
【００１１】
また、上記の往復動式電気かみそりの内刃において、外刃とによる髭の切断に関係のない前記小刃の内面のコーナーを面取りすることによって、ブラシが当たってもひっかかることがなくなり、スムーズに清掃が行える。
【００１２】
また、本発明に係る請求項７記載の往復動式電気かみそりは、上述した往復動式電気かみそりの内刃と、内面が該内刃の外面と接触するように断面逆Ｕ字状に湾曲されて配された網状外刃と、該網状外刃に対して前記内刃を前記支持壁部の長手方向に沿って往復動させる駆動機構とを具備することを特徴とする。
この構成により、内刃に付着した髭の清掃が簡単な往復動式電気かみそりを提供できる。
【００１３】
【発明の実施の形態】
以下、本発明に係る往復動式電気かみそりの内刃の好適な実施の形態を添付図面に基づいて詳細に説明する。なお、従来例と同じ構成については同じ符号を付し、詳細な説明は省略する。
（第１の実施の形態）
まず、往復動式電気かみそり５０の全体構成についてその概要を図１を用いて説明する。
電気かみそり５０は、網目状の開口を有し、薄い金属板で形成された網状外刃１２と、この外刃１２を湾曲した状態で保持する保持枠１４と、外刃１２の内面と接触しつつ往復動して髭を剃る内刃５２と、電源部の一例としての電池１８や電動モータ２０等が内蔵され、オン・オフスイッチ（不図示）が取り付けられた本体ケース２４と、本体ケース２４の上面から突出し、電動モータ２０の出力軸２６と内刃５２とを連結し、電動モータ２０の回転運動を内刃５２に対する往復運動に変換する駆動機構２８とから構成されている。
【００１４】
また、保持枠１４は外刃１２を湾曲して保持した状態で、内刃５２を覆うように本体ケース２４の上面に着脱自在に取り付けできる。
駆動機構２８は種々の構造を採用し得るが、本実施の形態では一例として、振動子５４と、振動子５４の上面に設けられ、内刃５２が連結される連結台５６と、振動子５４の下面に設けられた第１シャフト５８と電動モータ２０の出力軸２６に取り付けられた偏心ピン３６とを連結するリンク材６０とで構成され、出力軸２６の回転運動をリンク材６０を介して振動子５４の往復直線運動に変換している。
【００１５】
この外刃１２が取り付けられた保持枠１４の本体ケース２４に対する着脱機構は種々の構造が採用し得るが、一例として図１に示すように、本体ケース２４の上部側面に横方向に沿って突出入自在に取り付けられた係合突起６２と、この係合突起６２を常時突出方向へ付勢するバネ６４とを設け、一方保持枠１４の内面にはこの係合突起６２と係合する被係合突起６６を設ける機構を採用し得る。
この着脱機構では、保持枠１４を装着する場合には、保持枠１４を本体ケース２４に圧入すると、被係合突起６６が係合突起６２をバネ６４の付勢力に抗して本体ケース２４内へ押しながら係合突起６２を乗り越え、係合突起６２と係合し、装着が完了する。装着された保持枠１４はバネ６４の付勢力により突出する係合突起６２によって本体ケース２４から容易に外れなくなる。
また、本体ケース２４から取り外す場合には、逆に保持枠１４を非係合方向へ引っ張ることにより、非係合突起６６が係合突起６２をバネ６４の付勢力に抗して本体ケース２４内へ押しながら係合突起６２を乗り越えて外れるのである。
【００１６】
次に、本発明の特徴点である内刃５２の詳細な構成について図２〜図３を用いて説明する。
内刃５２は対向して配された一対の支持壁部５２ａ（本実施の形態では一例としてＴ字状）と、一対の支持壁部５２ａの上端間に掛け渡され、支持壁部５２ａの長手方向Ａに沿って複数並設された断面逆Ｕ字状の小刃５２ｂとから成る。この内刃５２の製造方法は従来例と同様であり、金属板体を断面逆Ｕ字状に屈曲し、屈曲部Ｂに、屈曲部Ｂの長手方向Ａを横切るスリット５２ｃを間隔（図２では一定間隔）を空けて複数開口して、屈曲部Ｂにおいて残った逆Ｕ字状の薄肉部を小刃５２ｂとして形成する。また同様に、金属板体の屈曲された先端側に位置する一対の延出部分Ｃが一対の支持壁部５２ａとして形成される。
なお、スリット５２ｃの方向は屈曲部Ｂの長手方向Ａと直交する方向としても良いし、また図４に示すように屈曲部Ｂの長手方向Ａと直交する方向に対して若干傾けて斜めに設ける場合もある。
【００１７】
ここで、本発明の内刃５２と従来の内刃１６との相違点は図３に示すように、内刃５２の一対の支持壁部５２ａには、従来の内刃１６のように連結ピン３４や連結ブロック４０等、支持壁部５２ａ間に掛け渡される部材が小刃５２ｂを除き一切取り付けられていない点にある。
そして内刃５２がこのような構造を有するため、内刃５２の内面、すなわち小刃５２ｂの内面Ｄや一対の支持壁部５２ａの対向する内面Ｅに付着した髭をブラシで払って清掃する場合に、使用者は全体として屈曲した形状の内刃５２の内部空間６８内で清掃用ブラシを自由に移動させながら内刃５２の一端側から他端側にかけて連続して清掃できるために、従来のように連結ピン３４や連結ブロック４０があった場合にはこれらが邪魔をしてブラシを当てにくかった内側の部位も簡単、かつ確実に清掃が行える。
【００１８】
（第２の実施の形態）
また、上述した実施の形態での内刃５２は一対の支持壁部５２ａ間に掛け渡されるものは小刃５２ｂのみであったが、図５や図６に示すような構成の内刃５２も可能である。
まず、図５の内刃５２は、対向して配された一対の支持壁部５２ａと、一対の支持壁部５２ａの上端間に掛け渡され、支持壁部５２ａの長手方向Ａに沿って複数並設された断面逆Ｕ字状の小刃５２ｂと、さらに小刃５２ｂと同じ断面形状に形成されて一対の支持壁部５２ａ間に掛け渡された連結アーチ７０とから構成されている。
【００１９】
すなわち、一対の支持壁部５２ａ間には、小刃５２ｂおよび連結アーチ７０のみが掛け渡されているのである。そして、この連結アーチ７０は一対の支持壁部５２ａ間の連結強度を確保するために設けられており、例えば内刃５２が一つの金属板体から製造される場合には、従来例や第１の実施の形態で説明した製造方法と同様に、屈曲して形成された金属板体の屈曲部Ｂにスリット５２ｃを間隔を空けて複数開口して、屈曲部Ｂにおいて残った逆Ｕ字状の薄肉部を小刃５２ｂとして形成すると共に、一部のスリット５２ｃ間、若しくは屈曲部Ｂの両端と当該端部に最も近いスリット５２ｃとの間の間隔Ｆを小刃５２ｂの厚さＧよりも肉厚に形成し、この肉厚部を連結アーチ７０とすることで形成できる。
【００２０】
本実施の形態では、連結アーチ７０は小刃５２ｂの両端側に１つずつ設けているが、さらに内刃５２の強度を求める場合には小刃５２ｂ間にも連結アーチ７０を設けて連結アーチ７０の数を増やすようにしても良い。
なお、金属板体の屈曲部Ｂ以外の一対の延出部分Ｃは互いに対向する一対の支持壁部５２ａとして形成される点は第１の実施の形態と同様である。
この構成によれば、一対の支持壁部５２ａ間には小刃５２ｂ以外に小刃５２ｂよりも剛性のある連結アーチ７０が掛け渡されているため、小刃５２ｂのみの場合に比べて内刃５２全体の強度を向上させることができる。
【００２１】
また、内刃５２の支持壁部５２ａを合成樹脂材料を用いて成形により製造する場合には、図６〜図８に示すように一対の支持壁部５２ａと連結アーチ７０は合成樹脂材料を用いて一体成形し、小刃５２ｂは一対の支持壁部５２ａ間にインサート成形により取り付ける方法で実現できる。図７は図６のＨ−Ｈ断面図であり、弧状（逆Ｕ字状）に形成された小刃５２ｂの両端部（図７中の下端部）が合成樹脂材料で構成された一対の支持壁部５２ａの上端部に埋め込まれている。また、図８は図６のＪ−Ｊ断面図であり、連結アーチ７０の断面形状を示し、その形状は小刃５２ｂと略同じ断面形状に形成される。
なお、外刃１２の内面と小刃５２ｂの外面が当接して摺動する必要があることから、連結アーチ７０の外面が小刃５２ｂの外面よりも突出する断面形状は不可であることから、ここで言う「略同じ断面形状」とは、連結アーチ７０の断面形状が小刃５２ｂの断面形状と同一断面形状であることは当然に含むと共に、同一断面形状ではなくても連結アーチ７０の外面が小刃５２ｂの外面よりも内側となり、かつ断面が略逆Ｕ字状に形成された断面形状も含む。
これにより、第１の実施の形態と同様に、内刃５２を側面（屈曲部Ｂの端部方向）から見た場合に、内刃５２は全体として図３と同様に断面逆Ｕ字状に形成されるため、髭をブラシで払って清掃する場合に、内刃５２の内部空間６８内でブラシを自由に移動させることができ、内刃５２の内面、すなわち小刃５２ｂの内面Ｄや一対の支持壁部５２ａの対向する内面Ｅに付着した髭をブラシで払って清掃することが簡単、かつ確実に行える。
【００２２】
続いて、上述した第１の実施の形態、第２の実施の形態のような内刃５２と駆動機構２８との連結構造について図９〜図１１を用いて説明する。
本発明に係る内刃５２の一対の支持壁部５２ａは屈曲部Ｂに形成された小刃５２ｂや連結アーチ７０以外では相互に連結されていないため、両方の支持壁部５２ａを駆動機構２８と連結させる必要がある。
そこで、一対の支持壁部５２ａの駆動機構２８側の端部（図２や図５、図６に於ける下端部）の両側面に凸部５２ｅを設けて、当該端部を逆Ｔ字状に形成する。
一方、駆動機構２８の一部を構成する振動子５４の上面には図９や図１０に示すように、一対の支持壁部５２ａの逆Ｔ字状の端部と連結する連結台５６を設ける。連結台５６は直方体に形成されると共に、中央部分には上方からコイルスプリング７２が装着可能な筒状凹部７４が形成され、またこの筒状凹部７４を挟むように両側面には一対の支持壁部５２ａの逆Ｔ字状の端部が嵌まり込むための上下方向に伸びる溝部７６が形成されている。また、各溝部７６の内部の上下方向に沿った対向する側面には一対の支持壁部５２ａの端部の両側面の凸部５２ｅと係合する連結凸部７６ａが形成されている。
なお、各溝部７６間の間隔は、コイルスプリング７２の直径よりも狭く、かつ内刃５２の一対の支持壁部５２ａの間隔に合わせて設定されているため、各溝部７６と筒状凹部７４とは連通した状態であり、筒状凹部７４に装着されたコイルスプリング７２はその一部が各溝部７６に突出する構成となる。
【００２３】
駆動機構２８に内刃５２を連結する場合には、一対の支持壁部５２ａの駆動機構２８側の逆Ｔ字状の下端部を、連結台５６の各溝部７６内に嵌め込んだ後に内刃５２を連結台５６方向へ押す。
この際に一対の支持壁部５２ａの下端部は連結台５６に装着されたコイルスプリング７２の一部と当接するが、コイルスプリング７２を押し縮めながら押し込み、凸部５２ｅを連結凸部７６ａ乗り越えてさらに下方に移動させる。これにより、図１１に示すように凸部５２ｅと連結凸部７６ａとが係合し、内刃５２は連結台５６と連結される。この状態では内刃５２は常時コイルスプリング７２により上方へ付勢されているため、駆動機構２８により往復動されても上下方向へのブレはなく、また髭剃りの際に外刃１２を介して皮膚から下方への押圧力が加わった場合でも内刃５２が下方へ移動してその押圧力を吸収でき、かつ皮膚との密着度も確保される。
また、内刃５２を連結台５６から取り外す場合には、内刃５２を連結台５６から離反する方向へ引き抜き、凸部５２ｅと連結凸部７６ａとの係合を解除することで容易に外せる。
【００２４】
また、連結台５６の他の実施の形態としては図１２〜図１４に示す構造のものが採用し得る。
この連結台５６は、互いの外側面７８ａ同志の間隔が、内刃５２の一対の支持壁部５２ａの対向する内面の間隔に合うように所定の間隔を空けて立設された２つの弾性片７８と、両弾性片７８の外側面７８ａの中途部分に側方に向けて突設された連結凸部７８ｂと、各連結凸部７８ｂと２つの弾性片７８に外嵌されたコイルスプリング７２とで構成されている。なお、本実施の形態のように柱状体の中心に上面から所定距離だけ下方に向けて切り込みを入れ、２つの弾性片７８を形成するようにしても良いし、連結台５６上に直接弾性片７８を立設する構成でも良い。
なお、内刃５２の一対の支持壁部５２ａの下端部には、連結凸部７８ｂが嵌まり込む長溝５２ｆを形成しておく（図１５参照）。
【００２５】
連結台５６への内刃５２の取付方法は、一対の支持壁部５２ａの下端部を、その内面が２つの弾性片７８の各外側面７８ａと向かい合うように位置決めしながら、内刃５２を連結台５６方向へ押し込む。この際に、一対の支持壁部５２ａの下端部が連結台５６に装着されたコイルスプリング７２と当接するが、コイルスプリング７２を押し縮めながら押し込む。
次に、一対の支持壁部５２ａの下端部が連結凸部７８ｂと当接したら、さらに内刃５２を下方に押動させることにより、両弾性片７８が押されて内側に倒れる。これにより、連結凸部７８ｂが一対の支持壁部５２ａの下端部の内面側に移動し、長溝５２ｆ内に達したら各弾性片７８が自らの弾性力により基の位置に復帰し、連結凸部７８ｂが長溝５２ｆ内に嵌まり込む。これにより、内刃５２は連結台５６と連結される。
また、内刃５２を連結台５６から取り外す場合には、内刃５２を連結台５６から力を加えながら引き離せばよい。引き離す際に、連結凸部７８ｂが長溝５２ｆの内周縁と当接するが、連結凸部７８ｂから力を受けた各弾性片７８が内側に倒れて両連結凸部７８ｂが両長溝５２ｆから外れるのである。
【００２６】
また、上記の往復動式電気かみそりの内刃５２において、図１６に示すように外刃１２と接触せず、髭の切断に関係のない小刃５２ｂの内面ＤのコーナーＤ１を面取りすることによって、清掃時にブラシが当たってもひっかかることがなくなり、スムーズな清掃が行える。この面取り加工は、プレス加工や放電加工により行うことができる。
また、本発明に係る内刃の構造は、上述した図２、図４、図５および図６に示すものに限らず、例えば図１７に示すようにスリット５２ｃを斜めに形成して小刃５２ｂを支持壁部５２ａの長手方向Ａと直交する方向に対して所定角度αだけ傾けて成る内刃にも適用できる。また、図１８に示すようにスリット５２ｃの間隔が支持壁部５２ａの長手方向Ａに沿って疎密となるように形成し、小刃５２ｂを疎密に形成した内刃にも適用できる。
【００２７】
以上、本発明の好適な実施例について種々述べてきたが、本発明は上述する実施例に限定されるものではなく、発明の精神を逸脱しない範囲で多くの改変を施し得るのはもちろんである。
【００２８】
【発明の効果】
本発明に係る請求項１乃至請求項２の往復動式電気かみそりの刃を用いると、内刃を駆動機構から取り外して、その内面、すなわち小刃の内面や一対の支持壁部の対向する内面に付着した髭をブラシで払って清掃する場合に、従来では一対の支持壁部間に連結ピンや連結ブロックがあったためにこれらが邪魔をしてブラシの移動を妨げて清掃が行いにくかったが、一対の支持壁部間の長手方向の一端側から他端側にかけて掛け渡されているのは小刃のみであって全体として逆Ｕ字状に屈曲した外形に内刃が形成されているため、内刃の内部空間内でブラシを自由に移動させながら内刃の一端側から他端側にかけて連続して内面に付着した髭の清掃でき、清掃が簡単、かつ確実に行えるという効果がある。
また、請求項３乃至請求項５の往復動式電気かみそりの刃を用いると、一対の支持壁部間には、その長手方向の一端側から他端側にかけて小刃以外に小刃と同じ断面形状であって前記小刃の厚さよりも肉厚に形成された連結アーチのみが掛け渡されているため、ブラシが内刃の内部空間内で自由に移動できて内刃の内面に付着した髭の清掃が行いやすい。さらに、小刃のみの場合に比べて連結アーチが一対の支持壁部間に掛け渡されているために内刃全体の強度が向上するという効果を奏する。
また、このような内刃を有する往復動式電気かみそりを用いると、内刃の清掃が簡単に行えるために、溜まった髭の清掃を行うことに抵抗を感じなくなり、頻繁に電気かみそりの清掃がなされ、外刃や内刃が綺麗な状態で髭を剃れるので、切れ味が良く気分がよくなると共に、外刃や内刃自体の劣化の進行も遅くなるという効果もある。
【図面の簡単な説明】
【図１】本発明に係る往復動式電気かみそりの内刃を有する電気かみそりの構造を示す部分拡大断面図である。
【図２】第１の実施の形態の往復動式電気かみそりの内刃の構造を示す正面図である。
【図３】図２の側面図である。
【図４】図２のスリットおよび小刃を斜めに形成した場合の平面図である。
【図５】第２の実施の形態の往復動式電気かみそりの内刃の構造を示す正面図である。
【図６】第２の実施の形態の往復動式電気かみそりの内刃の他の例の構造を示す正面図である。
【図７】図６の小刃の一対の支持壁部への取り付け構造を示すＨ−Ｈ矢視図である。
【図８】図６の連結アーチと一対の支持壁部との連結構造を示すＪ−Ｊ矢視図である。
【図９】内刃の駆動機構の一部を構成する振動子と連結台の構造を示す正面図である。
【図１０】図９の平面図である。
【図１１】図９に内刃を連結した状態を示す要部正面図である。
【図１２】内刃の駆動機構の一部を構成する振動子と連結台の他の構造を示す正面図である。
【図１３】図１２の平面図である。
【図１４】図１２の側面図である。
【図１５】図１２に内刃を連結した状態を示す要部正面図である。
【図１６】内刃の小刃の内面のコーナー部分を示す要部拡大斜視図である。
【図１７】他の実施の形態の往復動式電気かみそりの内刃の構造を示す正面図である。
【図１８】他の実施の形態の往復動式電気かみそりの内刃の構造を示す正面図である。
【図１９】従来の内刃を有する往復動式電気かみそりの構造を示す分解斜視図である。
【図２０】従来の内刃の他の例の構造を示す斜視図である。
【符号の説明】
１２外刃
１４保持枠
２０電動モータ
２４本体ケース
２８駆動機構
５０往復動式電気かみそり
５２内刃
５２ａ一対の支持壁部
５２ｂ小刃
５２ｃスリット
５４振動子
５６連結台[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reciprocating electric shaver inner blade and a reciprocating electric shaver using the same.
[0002]
[Prior art]
A conventional inner blade of a reciprocating electric shaver will be described.
First, an overall configuration of a general reciprocating electric shaver will be described with reference to FIG.
The electric razor 10 is formed using a thin metal plate, and has a mesh-like outer blade 12 having a mesh-like opening, a holding frame 14 that holds the outer blade 12 in a curved state, and an inner surface of the outer blade 12. An inner blade 16 that shaves by reciprocating while contacting, a main body case 24 in which a power source portion (battery as an example in this example) 18, an electric motor 20, an on / off switch 22 is attached on the surface, and a main body The drive mechanism 28 is provided on the upper surface of the case 24 and converts the rotational motion of the output shaft 26 of the electric motor 20 into linear motion to reciprocate the inner blade 16. The holding frame 14 can be detachably attached to the upper surface of the main body case 24 so as to cover the inner blade 16 in a state where the outer blade 12 is curved and held. As an example, the attachment / detachment mechanism engages hook pieces 30 provided on both side surfaces of the holding frame 14 with engagement grooves 32 provided on both sides of the upper surface of the main body case 24.
[0003]
Next, a detailed configuration of the inner blade 16 will be described.
The inner blades 16 are spanned between a pair of support wall portions 16a disposed opposite to each other and the upper ends of the pair of support wall portions 16a, and a plurality of the inner blades 16 are arranged in parallel along the longitudinal direction A of the support wall portions 16a. It consists of a U-shaped blade 16b.
One specific example of the manufacturing method of the inner blade 16 is that a metal plate is bent in an inverted U-shaped cross section, and a slit 16c that crosses the longitudinal direction A of the bent portion B is provided at an interval in the bent portion B of the metal plate. The inverted U-shaped thin portion remaining in the bent portion B is formed as the small blade 16b. Further, the pair of extending portions C located on the bent front end side of the metal plate, that is, the portions other than the bent portions are formed as a pair of support wall portions 16a facing each other.
[0004]
Further, the pair of support wall portions 16a of the inner blade 16 has a connecting pin 34 for holding the shape of the inner blade 16 in an inverted U-shaped cross section as shown in FIG. 19, and an electric motor as shown in FIG. A connecting block 40 made of a synthetic resin having a slit 38 provided on the lower surface thereof, which is attached to the output shaft 26 of the 20 and is engaged with an eccentric pin 36 constituting a part of the drive mechanism 28, is attached, and a pair of supports The wall portions 16a are connected to each other.
[0005]
[Problems to be solved by the invention]
However, the inner blade of the above-described conventional reciprocating electric shaver has the following problems.
The shaved scissors enter the inside of the inverted U-shaped inner blade 16 and accumulate on the upper surface of the main body case 24.
When cleaning the scissors, the scissors accumulated on the upper surface of the main body case 24 are removed with a brush or the like, and are applied to the inner surface of the inner blade 16, that is, the inner surfaces of the small blades 16b and the inner surfaces of the pair of support wall portions 16a. In order to adhere, it is necessary to remove the adhered wrinkles with a brush.
However, the connecting pin 34 and the connecting block 40 attached between the pair of support wall portions 16a are obstructed, and the brush cannot be moved along the support wall portion 16a. There has been a problem that it is difficult to clean the opposing inner surfaces of the pair of support wall portions 16a, and it takes time to clean.
[0006]
Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a reciprocating electric shaver inner blade and a reciprocating electric shaver which are easy to clean inside the inner blade.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an inner blade of a reciprocating electric shaver according to claim 1 according to the present invention comprises a pair of supporting wall portions disposed opposite to each other and an upper end of the pair of supporting wall portions. In the inner blade of a reciprocating electric shaver detachably attached to a drive mechanism, the blade includes a plurality of inverted U-shaped small blades that are spanned and arranged in parallel along the longitudinal direction of the support wall. Only the small blade is spanned between the support wall portions from one end side in the longitudinal direction to the other end side .
According to this configuration, when the scissors attached to the inner surface of the inner blade, i.e., the inner surface of the small blade or the opposing inner surfaces of the pair of support walls are removed with a brush, the inner blade having a bent outer shape as a whole is used. Since it is possible to continuously clean the inner blade from one end side to the other end side while moving the brush freely in the internal space, if there is a connecting pin or connecting block as in the past, these will interfere Parts that were difficult to apply with the brush can be easily and reliably cleaned.
[0008]
Further, the specific structure of the inner blade is that the pair of support wall portions are formed by a pair of extending portions facing each other of the metal plate body that is bent in two so that the bent portion has an inverted U-shaped cross section. The small blade is formed by opening a plurality of slits across the bending portion in the longitudinal direction of the bending portion at intervals, and each lower end portion of the pair of support wall portions is connected to a driving mechanism. Yes.
[0009]
According to a third aspect of the present invention, there is provided the inner blade of the reciprocating electric shaver spanned between a pair of opposing support wall portions and the upper ends of the pair of support wall portions, In the inner blade of a reciprocating electric razor comprising a plurality of inverted U-shaped small blades arranged side by side along the longitudinal direction of the portion, between the pair of supporting wall portions , one end side in the longitudinal direction From the first to the other end side, only the connecting arch that has the same cross-sectional shape as the small blade and the small blade and is thicker than the thickness of the small blade is juxtaposed and stretched. .
According to this structure, since the connection arch is spanned between the pair of support walls in addition to the small blade, the strength of the entire inner blade can be improved as compared with the case of only the small blade. The small blade and the connection arch may be manufactured from a single metal plate.
[0010]
In addition, the pair of support wall portions and the connection arch are integrally formed using a synthetic resin material, and the small blade can be easily manufactured by insert molding between the pair of support wall portions. Further, the strength of the entire inner blade can be improved by the connecting arch.
[0011]
Further, in the inner blade of the above-described reciprocating electric razor, by chamfering the corner of the inner surface of the small blade which is not related to the cutting of the ridge by the outer blade, even if the brush hits, it is not caught and smoothly It can be cleaned.
[0012]
The reciprocating electric shaver according to claim 7 of the present invention is curved in an inverted U shape in cross section so that the inner blade and the inner surface of the above-described reciprocating electric shaver are in contact with the outer surface of the inner blade. And a drive mechanism for reciprocating the inner blade along the longitudinal direction of the support wall portion with respect to the mesh outer blade.
With this configuration, it is possible to provide a reciprocating electric shaver that can easily clean the ridges attached to the inner blade.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an inner blade of a reciprocating electric shaver according to the invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the same structure as a prior art example, and detailed description is abbreviate | omitted.
(First embodiment)
First, the outline of the overall configuration of the reciprocating electric shaver 50 will be described with reference to FIG.
The electric razor 50 has a mesh-shaped opening and is in contact with the mesh outer blade 12 formed of a thin metal plate, the holding frame 14 that holds the outer blade 12 in a curved state, and the inner surface of the outer blade 12. An inner blade 52 that reciprocates while shaving, a battery case 18 as an example of a power supply unit, an electric motor 20, and the like, and a main body case 24 to which an on / off switch (not shown) is attached, and a main body case 24 And a drive mechanism 28 that connects the output shaft 26 of the electric motor 20 and the inner blade 52 and converts the rotational motion of the electric motor 20 into reciprocating motion with respect to the inner blade 52.
[0014]
Further, the holding frame 14 can be detachably attached to the upper surface of the main body case 24 so as to cover the inner blade 52 in a state where the outer blade 12 is curved and held.
The drive mechanism 28 may employ various structures, but in the present embodiment, as an example, the vibrator 54, a connection base 56 provided on the upper surface of the vibrator 54, to which the inner blade 52 is connected, and the vibrator 54 The first shaft 58 provided on the lower surface of the electric motor 20 and a link member 60 that connects the eccentric pin 36 attached to the output shaft 26 of the electric motor 20, and the rotational movement of the output shaft 26 via the link member 60. It is converted into a reciprocating linear motion of the vibrator 54.
[0015]
Although various structures can be employed for the attachment / detachment mechanism of the holding frame 14 to which the outer blade 12 is attached to the main body case 24, as an example, as shown in FIG. 1, it protrudes along the lateral direction on the upper side surface of the main body case 24. An engaging protrusion 62 that is freely inserted and a spring 64 that constantly urges the engaging protrusion 62 in the protruding direction are provided, and the inner surface of the holding frame 14 is engaged with the engaging protrusion 62. A mechanism for providing the mating protrusion 66 may be employed.
In this attachment / detachment mechanism, when the holding frame 14 is mounted, when the holding frame 14 is press-fitted into the main body case 24, the engaged protrusion 66 opposes the engaging protrusion 62 against the urging force of the spring 64. The bosses get over the engaging protrusions 62 and engage with the engaging protrusions 62 to complete the mounting. The mounted holding frame 14 is not easily detached from the main body case 24 by the engagement protrusion 62 protruding by the urging force of the spring 64.
On the other hand, when removing from the main body case 24, the holding frame 14 is pulled in the non-engagement direction so that the non-engagement protrusion 66 resists the engagement protrusion 62 against the biasing force of the spring 64. While pushing, the engagement protrusion 62 is overcome and disengaged.
[0016]
Next, a detailed configuration of the inner blade 52 that is a feature of the present invention will be described with reference to FIGS.
The inner blade 52 is spanned between a pair of support wall portions 52a (T-shaped as an example in the present embodiment) arranged opposite to each other and the upper ends of the pair of support wall portions 52a, and the longitudinal length of the support wall portion 52a. A plurality of small blades 52b having an inverted U-shaped cross section arranged in parallel along the direction A. The manufacturing method of the inner blade 52 is the same as that of the conventional example. The metal plate is bent in an inverted U-shaped cross section, and a slit 52c that crosses the longitudinal direction A of the bent portion B is provided in the bent portion B (see FIG. 2). A plurality of openings are formed at regular intervals), and the inverted U-shaped thin portion remaining in the bent portion B is formed as the small blade 52b. Similarly, a pair of extending portions C located on the bent tip side of the metal plate body are formed as a pair of support wall portions 52a.
The direction of the slit 52c may be a direction orthogonal to the longitudinal direction A of the bent portion B, or as shown in FIG. 4, it is provided obliquely with a slight inclination with respect to the direction orthogonal to the longitudinal direction A of the bent portion B. In some cases.
[0017]
Here, the difference between the inner blade 52 of the present invention and the conventional inner blade 16 is that, as shown in FIG. 3, a pair of support wall portions 52 a of the inner blade 52 is connected to a connecting pin like the conventional inner blade 16. 34, the connection block 40, and the like are not attached at all except for the small blade 52b.
And, since the inner blade 52 has such a structure, the inner blade 52, that is, the inner surface of the inner blade 52, that is, the inner surface D of the small blade 52b and the scissors adhering to the opposing inner surface E of the pair of support wall portions 52a is cleaned with a brush. In addition, since the user can continuously clean the inner brush 52 from one end side to the other end side while freely moving the cleaning brush in the inner space 68 of the inner blade 52 having a bent shape, Thus, when there are the connecting pin 34 and the connecting block 40, the inner part where they are obstructed and it is difficult to apply the brush can be easily and reliably cleaned.
[0018]
(Second Embodiment)
In the above-described embodiment, the inner blade 52 is only the small blade 52b spanned between the pair of support wall portions 52a. However, the inner blade 52 configured as shown in FIGS. Is possible.
First, the inner blade 52 in FIG. 5 is spanned between a pair of support wall portions 52a arranged opposite to each other and the upper ends of the pair of support wall portions 52a, and a plurality of inner blades 52 are arranged along the longitudinal direction A of the support wall portion 52a. A small blade 52b having an inverted U-shaped cross section provided side by side and a connection arch 70 formed in the same cross-sectional shape as the small blade 52b and spanned between a pair of support wall portions 52a.
[0019]
That is, only the small blade 52b and the connection arch 70 are spanned between the pair of support wall portions 52a. And this connection arch 70 is provided in order to ensure the connection intensity | strength between a pair of support wall parts 52a, for example, when the inner blade 52 is manufactured from one metal plate body, a conventional example or 1st is demonstrated. Similarly to the manufacturing method described in the embodiment, a plurality of slits 52c are opened at intervals in the bent portion B of the metal plate body formed by bending, and the inverted U-shaped remaining in the bent portion B is formed. The thin wall portion is formed as the small blade 52b, and the gap F between some slits 52c or between the both ends of the bent portion B and the slit 52c closest to the end portion is larger than the thickness G of the small blade 52b. It can be formed by forming it thick and using this thick portion as the connecting arch 70.
[0020]
In the present embodiment, one connecting arch 70 is provided at each end of the small blade 52b. However, when the strength of the inner blade 52 is further determined, the connecting arch 70 is also provided between the small blades 52b. The number 70 may be increased.
The pair of extending portions C other than the bent portion B of the metal plate is the same as the first embodiment in that it is formed as a pair of support wall portions 52a facing each other.
According to this configuration, since the connecting arch 70 which is stiffer than the small blade 52b is spanned between the pair of support wall portions 52a in addition to the small blade 52b, the inner blade is compared with the case where only the small blade 52b is provided. The overall strength of 52 can be improved.
[0021]
When the support wall portion 52a of the inner blade 52 is manufactured by molding using a synthetic resin material, the pair of support wall portions 52a and the connecting arch 70 are made of a synthetic resin material as shown in FIGS. The small blade 52b can be realized by a method of attaching by insert molding between the pair of support wall portions 52a. 7 is a cross-sectional view taken along the line H-H in FIG. 6, and a pair of supports in which both end portions (lower end portions in FIG. 7) of the small blade 52 b formed in an arc shape (inverted U shape) are made of a synthetic resin material. It is embedded in the upper end part of the wall part 52a. FIG. 8 is a cross-sectional view taken along the line JJ of FIG. 6 and shows the cross-sectional shape of the connecting arch 70, which is formed in a cross-sectional shape substantially the same as the small blade 52b.
Since the inner surface of the outer blade 12 and the outer surface of the small blade 52b need to contact and slide, the cross-sectional shape in which the outer surface of the connecting arch 70 protrudes from the outer surface of the small blade 52b is not possible. Here, “substantially the same cross-sectional shape” naturally includes that the cross-sectional shape of the connecting arch 70 is the same cross-sectional shape as the cross-sectional shape of the small blade 52b, and the outer surface of the connecting arch 70 is not necessarily the same cross-sectional shape. Includes a cross-sectional shape that is on the inner side of the outer surface of the small blade 52b and has a substantially inverted U-shaped cross-section.
As a result, as in the first embodiment, when the inner blade 52 is viewed from the side surface (in the end portion direction of the bent portion B), the inner blade 52 as a whole has an inverted U-shaped cross section as in FIG. Therefore, when the scissors are cleaned with a brush, the brush can be freely moved in the internal space 68 of the inner blade 52, and the inner surface of the inner blade 52, that is, the inner surface D of the small blade 52b or a pair It is possible to easily and reliably clean the scissors adhering to the opposing inner surface E of the support wall 52a with a brush.
[0022]
Next, a connection structure between the inner blade 52 and the drive mechanism 28 as in the first embodiment and the second embodiment described above will be described with reference to FIGS.
Since the pair of support wall portions 52a of the inner blade 52 according to the present invention are not connected to each other except the small blade 52b and the connection arch 70 formed in the bent portion B, both the support wall portions 52a and the drive mechanism 28 are connected. Must be connected.
Therefore, convex portions 52e are provided on both side surfaces of the end portions on the drive mechanism 28 side of the pair of support wall portions 52a (lower end portions in FIGS. 2, 5, and 6), and the end portions are inverted T-shaped. To form.
On the other hand, as shown in FIG. 9 and FIG. 10, a connecting base 56 is provided on the upper surface of the vibrator 54 constituting a part of the drive mechanism 28. The connecting base 56 is connected to the inverted T-shaped ends of the pair of support walls 52a. . The coupling base 56 is formed in a rectangular parallelepiped shape, and a cylindrical recess 74 to which a coil spring 72 can be attached from above is formed in the central portion, and a pair of support walls are provided on both sides so as to sandwich the cylindrical recess 74. A groove portion 76 extending in the vertical direction for fitting an inverted T-shaped end portion of the portion 52a is formed. In addition, connecting convex portions 76 a that engage with convex portions 52 e on both side surfaces of the end portions of the pair of support wall portions 52 a are formed on opposite side surfaces along the vertical direction inside each groove portion 76.
In addition, since the space | interval between each groove part 76 is narrower than the diameter of the coil spring 72, and is set according to the space | interval of a pair of support wall part 52a of the inner blade 52, each groove part 76, the cylindrical recessed part 74, and Is a state in which the coil spring 72 mounted in the cylindrical recess 74 protrudes into each groove 76.
[0023]
When the inner blade 52 is connected to the drive mechanism 28, the inner blade 52 is inserted after the inverted T-shaped lower ends of the pair of support walls 52 a on the drive mechanism 28 side are fitted into the grooves 76 of the connection table 56. 52 is pushed in the direction of the connecting table 56.
At this time, the lower end portions of the pair of support wall portions 52a come into contact with a part of the coil spring 72 mounted on the coupling base 56. However, the coil spring 72 is pushed in while being compressed, and the convex portion 52e is moved over the coupling convex portion 76a. Move further down. Thereby, as shown in FIG. 11, the convex part 52e and the connection convex part 76a engage, and the inner blade 52 is connected with the connection stand 56. In this state, the inner blade 52 is always urged upward by the coil spring 72, so that even if the inner blade 52 is reciprocated by the drive mechanism 28, there is no up-and-down movement, and the shaving is performed through the outer blade 12. Even when a downward pressing force is applied from the skin, the inner blade 52 moves downward to absorb the pressing force, and the degree of adhesion with the skin is also ensured.
Moreover, when removing the inner blade 52 from the connection stand 56, it can remove easily by pulling out the inner blade 52 in the direction away from the connection stand 56, and releasing engagement with the convex part 52e and the connection convex part 76a.
[0024]
Moreover, as another embodiment of the connection stand 56, the thing of the structure shown in FIGS. 12-14 can be employ | adopted.
The connecting stand 56 is provided with two elastic pieces that are erected at a predetermined interval so that the interval between the outer side surfaces 78a matches the interval between the opposing inner surfaces of the pair of support wall portions 52a of the inner blade 52. 78, connecting projections 78b projecting laterally in the middle of the outer side surfaces 78a of both elastic pieces 78, coil springs 72 fitted to the respective connecting projections 78b and the two elastic pieces 78, It consists of In addition, as in the present embodiment, the center of the columnar body may be cut downward by a predetermined distance from the upper surface to form two elastic pieces 78, or the elastic pieces directly on the coupling base 56 The structure which stands up 78 may be sufficient.
A long groove 52f into which the connecting projection 78b is fitted is formed at the lower end of the pair of support wall portions 52a of the inner blade 52 (see FIG. 15).
[0025]
The inner blade 52 is attached to the connection base 56 by connecting the inner blade 52 while positioning the lower ends of the pair of support wall portions 52a so that the inner surfaces thereof face the outer surfaces 78a of the two elastic pieces 78. Push in the direction of table 56. At this time, the lower end portions of the pair of support wall portions 52a come into contact with the coil spring 72 mounted on the coupling base 56, but the coil spring 72 is pushed in while being compressed.
Next, when the lower end portions of the pair of support wall portions 52a come into contact with the connecting convex portions 78b, the inner blade 52 is further pushed downward to push both elastic pieces 78 and fall inward. Thereby, the connection convex part 78b moves to the inner surface side of the lower end part of a pair of support wall part 52a, and if it reaches in the long groove 52f, each elastic piece 78 will return to the position of a base by own elastic force, and a connection convex part 78b fits into the long groove 52f. As a result, the inner blade 52 is connected to the connecting table 56.
Further, when the inner blade 52 is removed from the connection table 56, the inner blade 52 may be pulled away while applying a force from the connection table 56. When pulling apart, the connecting projection 78b comes into contact with the inner peripheral edge of the long groove 52f. However, each elastic piece 78 receiving the force from the connecting projection 78b falls inward and the two connecting projections 78b come off from both the long grooves 52f. .
[0026]
Further, in the inner blade 52 of the above-described reciprocating electric razor, by chamfering the corner D1 of the inner surface D of the small blade 52b which does not contact the outer blade 12 as shown in FIG. Even if the brush hits at the time of cleaning, it will not get caught and smooth cleaning can be performed. This chamfering can be performed by press working or electric discharge machining.
Further, the structure of the inner blade according to the present invention is not limited to that shown in FIGS. 2, 4, 5 and 6 described above, and for example, as shown in FIG. 17, slits 52c are formed obliquely to form a small blade 52b. Can also be applied to an inner blade that is inclined by a predetermined angle α with respect to a direction orthogonal to the longitudinal direction A of the support wall portion 52a. In addition, as shown in FIG. 18, the slit 52c is formed so that the interval between the slits 52c becomes dense along the longitudinal direction A of the support wall 52a, and the present invention can be applied to an inner blade in which the small blades 52b are formed densely.
[0027]
The preferred embodiments of the present invention have been described above in various ways. However, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .
[0028]
【The invention's effect】
When the reciprocating electric razor blade according to claim 1 or 2 according to the present invention is used, the inner blade is removed from the drive mechanism, and the inner surface thereof , that is , the inner surface of the small blade or the pair of supporting wall portions are opposed to each other. In the past, there was a connecting pin or connecting block between the pair of support walls when cleaning the scissors attached to the brush with a brush, which prevented them from moving and preventing the brush from moving. Since only the small blade is stretched from one end side to the other end side in the longitudinal direction between the pair of support wall portions, the inner blade is formed in an outer shape bent in an inverted U shape as a whole. The scissors adhering to the inner surface continuously from one end side to the other end side of the inner blade while moving the brush freely in the inner space of the inner blade can be cleaned, and there is an effect that the cleaning can be performed easily and reliably.
Further, when the reciprocating type electric razor blade of claim 3 to 5 is used, the same cross section as the small blade except for the small blade from one end side to the other end side in the longitudinal direction between the pair of support walls. Since only the connecting arch formed in a shape and thicker than the thickness of the small blade is stretched over, the brush can move freely in the inner space of the inner blade and adhere to the inner surface of the inner blade. Easy to clean. Furthermore, since the connecting arch is spanned between the pair of support wall portions as compared with the case of only the small blade, the effect of improving the strength of the entire inner blade is obtained.
In addition, using a reciprocating electric razor having such an inner blade makes it easier to clean the inner blade, so there is no resistance to cleaning the accumulated ridges, and frequent cleaning of the electric razor is not possible. Since the razor can be shaved with the outer and inner blades being clean, the sharpness is improved and the mood is improved, and the deterioration of the outer and inner blades itself is also slowed down.
[Brief description of the drawings]
FIG. 1 is a partially enlarged sectional view showing a structure of an electric razor having an inner blade of a reciprocating electric razor according to the present invention.
FIG. 2 is a front view showing the structure of the inner blade of the reciprocating electric shaver according to the first embodiment.
FIG. 3 is a side view of FIG. 2;
4 is a plan view when the slits and blades of FIG. 2 are formed obliquely. FIG.
FIG. 5 is a front view showing a structure of an inner blade of a reciprocating electric shaver according to a second embodiment.
FIG. 6 is a front view showing the structure of another example of the inner blade of the reciprocating electric shaver according to the second embodiment.
7 is an HH arrow view showing a structure for attaching the small blade of FIG. 6 to a pair of support wall portions.
8 is a JJ arrow view showing a connection structure between the connection arch of FIG. 6 and a pair of support wall portions.
FIG. 9 is a front view showing a structure of a vibrator and a connecting base that constitute a part of the driving mechanism of the inner blade.
FIG. 10 is a plan view of FIG. 9;
11 is a main part front view showing a state in which the inner blades are connected to FIG. 9; FIG.
FIG. 12 is a front view showing another structure of the vibrator and the connecting base that constitute a part of the driving mechanism of the inner blade.
FIG. 13 is a plan view of FIG.
14 is a side view of FIG. 12. FIG.
15 is a main part front view showing a state where the inner blades are connected to FIG. 12. FIG.
FIG. 16 is an enlarged perspective view of a main part showing a corner portion of the inner surface of the small blade of the inner blade.
FIG. 17 is a front view showing a structure of an inner blade of a reciprocating electric shaver according to another embodiment.
FIG. 18 is a front view showing a structure of an inner blade of a reciprocating electric shaver according to another embodiment.
FIG. 19 is an exploded perspective view showing the structure of a reciprocating electric shaver having a conventional inner blade.
FIG. 20 is a perspective view showing the structure of another example of a conventional inner blade.
[Explanation of symbols]
12 outer blade 14 holding frame 20 electric motor 24 main body case 28 drive mechanism 50 reciprocating electric shaver 52 inner blade 52a pair of support wall portions 52b small blade 52c slit 54 vibrator 56 coupling base

Claims

A pair of support wall portions disposed opposite to each other, and a plurality of inverted U-shaped cross-section blades that are spanned between the upper ends of the pair of support wall portions and arranged in parallel along the longitudinal direction of the support wall portion; In the inner blade of a reciprocating electric shaver that can be attached to and detached from the drive mechanism, only the small blade is spanned between the pair of support walls from one end side to the other end side in the longitudinal direction. An inner blade of a reciprocating electric razor characterized by

A pair of support wall portions disposed opposite to each other, and a plurality of inverted U-shaped cross-section blades that are spanned between the upper ends of the pair of support wall portions and arranged in parallel along the longitudinal direction of the support wall portion; In the inner blade of a reciprocating electric shaver comprising: only the small blade is spanned between the pair of support wall portions from one end side to the other end side in the longitudinal direction,
The pair of support wall portions are formed by a pair of opposing extending portions of a metal plate that is bent in two so that the bent portion has an inverted U-shaped cross section, and the small blade includes the bent portion Is formed by opening a plurality of slits across the longitudinal direction of the bent portion at intervals ,
Inner cutter of a reciprocating electric shaver in which each lower end portion of the pair of support wall portion, characterized in Rukoto connected to a drive mechanism.

A pair of support wall portions disposed opposite to each other, and a plurality of inverted U-shaped cross-section blades that are spanned between the upper ends of the pair of support wall portions and arranged in parallel along the longitudinal direction of the support wall portion; in the inner cutter of a reciprocating electric shaver comprising a said between the pair of support wall portions, the small and of the same cross-sectional shape as the cutter blades and the cutter blades toward the other end from one end in the longitudinal direction An inner blade of a reciprocating electric shaver characterized in that only a connecting arch formed thicker than the thickness of the blade is juxtaposed.

A pair of support wall portions arranged opposite to each other, and a plurality of inverted U-shaped blades that are spanned between the upper ends of the pair of support wall portions and arranged in parallel along the longitudinal direction of the support wall portion, In the inner blade of a reciprocating electric shaver comprising: the small blade and the small blade have the same cross-sectional shape from one end side to the other end side in the longitudinal direction between the pair of support wall portions. Only the connecting arches formed thicker than the blade thickness are juxtaposed,
The inner blade of a reciprocating electric shaver, wherein the small blade and the connecting arch are manufactured from a single metal plate.

4. The pair of support wall portions and the connection arch are integrally formed using a synthetic resin material, and the small blade is attached between the pair of support wall portions by insert molding. Inner blade of the reciprocating electric razor as described.

6. The inner blade of a reciprocating electric shaver according to claim 1 , wherein a corner of the inner surface of the small blade is chamfered.

An inner blade of the reciprocating electric shaver according to claim 1, 2 , 3 , 4 , 5, or 6, and a net-like shape arranged so as to be curved in an inverted U-shaped cross section so that the inner surface is in contact with the outer surface of the inner blade. A reciprocating electric shaver comprising an outer blade and a drive mechanism for reciprocating the inner blade along the longitudinal direction of the support wall with respect to the mesh outer blade.