JP4766536B2 - Shear blade - Google Patents

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Publication number
JP4766536B2
JP4766536B2 JP2001185560A JP2001185560A JP4766536B2 JP 4766536 B2 JP4766536 B2 JP 4766536B2 JP 2001185560 A JP2001185560 A JP 2001185560A JP 2001185560 A JP2001185560 A JP 2001185560A JP 4766536 B2 JP4766536 B2 JP 4766536B2
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Prior art keywords
blade
comb
fixed
movable
edge
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JP2001185560A
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JP2003000966A (en
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伸紀 八尋
幸太郎 岩倉
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Kyushu Hitachi Maxell Ltd
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Kyushu Hitachi Maxell Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、固定刃に対して可動刃が左右方向に往復摺動することで、毛髪を切断するせん断刃に関する。
【0002】
【従来の技術】
この種のせん断刃は、例えば特公昭57−12635号公報に示すごとく、多数の櫛状刃を左右方向に配列した固定刃に対して、多数の櫛状刃を左右方向に配列した可動刃が左右方向に往復摺動することで、毛髪を切断する。
【0003】
【発明が解決しようとする課題】
かかるせん断刃では、固定刃および可動刃の摺接面にそれぞれ形成された刃先が毛髪を挟み込んで支持しつつ切断することになる。しかし、従来の刃先では毛髪をしっかりと支持できなかった。
【0004】
このため、毛髪が斜めになって、その毛髪が固定刃や可動刃から抜け出たり斜めに切断されたりすることがあり、毛髪が適切に切断できないところに問題があった。特にバリカンのせん断刃における櫛状刃では、先端側になるほど幅が狭くなって隣合う櫛状刃間のすきまが広くなるため、毛髪が櫛状刃間から抜け出やすい。また、可動刃の左右方向への往復動を案内する案内体と、固定刃との接触による磨耗を防止する必要がある。
【0005】
本発明の目的は、毛髪を確実かつ適切に切断できるせん断刃を得ることにある。本発明の目的は、切断性能を高く維持するために、毛髪を確実に支持できるようにすることにある。本発明の目的は、可動刃の左右方向への往復動を案内する案内体と固定刃との接触による磨耗を防止することにある。
【0006】
【課題を解決するための手段】
本発明が対象とするせん断刃は、図2〜図5に示すごとく多数の櫛状刃15が左右方向に配列された固定刃12と、多数の櫛状刃20が左右方向に配列されて固定刃12に対して左右方向に往復摺動する可動刃13とを有する。ここでのせん断刃は、バリカンのせん断刃や、電気かみそりのきわぞり刃や、うぶ毛カッターや、まゆ毛カッターなどが該当する。
【0007】
本発明は、かかるせん断刃において、図1に示すごとく固定刃12の各櫛状刃15の厚み方向の中間位置にエッジ部27が突出形成されており、固定刃12の各櫛状刃15は、エッジ部27と可動刃12に対する摺動面12aとの間が凹曲状に形成されていて摺動面12a側に鋭角状の刃先28が形成されていることを特徴とする。ここにおいて、エッジ部27と摺動面12aとの間は、エッチングによって凹曲状に凹ませる場合と、研磨によって湾曲状に凹ませる場合などが含まれる。エッジ部27は、必ずしも尖っている必要はなく、毛髪9を支持可能であれば断面円弧状であってもよい。
【0008】
更に具体的に説明すると、固定刃12の櫛状刃15および可動刃13の櫛状刃20は、それぞれの摺動面12a・13a側の左右に刃先28・29が付けられており、図9に示すごとく可動刃13の櫛状刃20の刃先29の角度αが、固定刃12の櫛状刃15の刃先の角度βよりも小さく寸法設定されている。
【0009】
エッジ部27の形成位置は、図1に示すごとく固定刃15の開放面12bまでの距離よりも摺動面12aまでの距離の方が短くなっている。固定刃12の櫛状刃15は、エッジ部27の形成位置の幅と、刃先28の形成位置の幅とが等しくなっている。
【0010】
更に図6に示すごとく、固定刃12の摺動面12a側に形成した凹部17内には、突起18が配置されており、可動刃13には、左右方向に延びる案内溝22aを有する案内体22を固定してある。この案内溝22aに突起18が嵌入することにより、可動刃13が左右方向にのみ往復動するよう案内されている。ここでの可動刃13への案内体22の固定には、可動刃13に設けた貫通孔あるいは凹部に案内体22をアウトサート成形によって形成する場合と、前記貫通孔あるいは凹部に案内体22を嵌合する場合などが該当する。案内溝22aは、案内体22に凹ませて形成する場合と、案内体22を貫通して形成する場合などが該当する。
【0011】
また、可動刃13の櫛状刃20の先端部20aは、図5および図12に示すごとく左右の刃先29が平行になっている。
【0012】
【発明の作用効果】
本発明に係るせん断刃は、毛髪9が固定刃12と可動刃13とによって切断される際に、図13に示すごとく毛髪9が固定刃12の櫛状刃15の刃先28とエッジ部27とによって2点で支持されるため、その毛髪9がしっかりと支持される。従って、毛髪9が斜めになって固定刃12の隣合う櫛状刃15間から逃げ出たり、毛髪9が斜めに切断されたりすることが防止される。この結果、毛髪9が確実かつ適切に切断されることになる。
【0013】
可動刃13の櫛状刃20の刃先29の角度αが、固定刃12の櫛状刃15の刃先28の角度βよりも小さいと、毛髪9の切断に大きく寄与する可動刃13の櫛状刃20の刃先29が鋭くなって毛髪9を的確に切断できて、切断性能を高く維持できる。
【0014】
このうえで、固定刃12の櫛状刃15の刃先28の角度βが大きいことで、この刃先28と毛髪9との接触面積が増えて、毛髪9を固定刃12の櫛状刃15の刃先28とエッジ部27とで更に確実に支持できる。
【0015】
エッジ部27の形成位置が、固定刃15の開放面12bまでの距離よりも摺動面12aまでの距離の方が短くなっていると、エッジ部27と刃先28とが近付いているので、毛髪9がエッジ部27と刃先28との間で湾曲して、刃先28に対して斜めになることが抑制され、毛髪9の適正な切断に貢献する。
【0016】
固定刃12の櫛状刃15は、エッジ部27の形成位置の幅と刃先28の形成位置の幅とが等しくなっていると、毛髪9を固定刃12の櫛状刃15の刃先28とエッジ部27とによって略まっすぐに支持できて、毛髪9が斜めに切断されたりすることなどが確実に防止できる。
【0017】
可動刃13の案内体22の案内溝22aに嵌入して可動刃13の左右方向への往復動を案内する固定刃12の突起18が、固定刃12の凹部17内に配置されていると、案内体22が可動刃13側から固定刃12側へ突出していても、これが固定刃12の凹部17内に入り込むことで、案内体22と固定刃12との接触が防止されているので、これらの接触による磨耗などをよく防止できる。
【0018】
そして、案内溝22aに突起18が嵌入することで、可動刃13の左右方向の往復動が案内されて、可動刃13が正確な往復動を行うことができて、せん断刃の切れ味を向上させることができる。しかも、前記凹部17が固定刃12の摺動面12a側に形成されていると、固定刃12と可動刃13との接触面積が減るため、固定刃12と可動刃13とを互いに押圧接触させるためのばねの付勢力を小さくしても、確実に押圧接触させることができる。更に接触面積が減ることで、摩擦抵抗を減らすことができて、消費電力を低減することができる。
【0019】
可動刃13の櫛状刃20における先端部20aの左右の刃先29が平行になっていると、隣合う櫛状刃20間に入り込んだ毛髪9が、刃先29に沿って斜めに抜けることなどを防止できて、毛髪9を確実に切断できる。
【0020】
【発明の実施の形態】
図面は本発明に係るせん断刃の実施例を示す。図2において、筒状の本体ケース1の内部には、モータ3および電池4などが配置されている。本体ケース1のヘッド部2には、本発明が対象とするせん断刃5が配置されている。本体ケース1の前面には、図3に示すごとくモータ3への通電をオンオフする起動スイッチ6を有する。
【0021】
本体ケース1内には、モータ3の回転駆動力を左右方向への往復動作に変換してせん断刃5へ伝えるための駆動機構を有する。この駆動機構は、モータ3の出力軸に連結される偏心カム7と、せん断刃5に連結される振動子8などで構成されており、振動子8が偏心カム7の偏心位置に突設したクランクピン7aによって左右方向へ往復動する。
【0022】
せん断刃5は、合成樹脂などからなるホルダー16を介して本体ケース1のヘッド部2に固定支持される固定刃12と、ホルダー16の上面内部の可動刃固定台21を介して前記振動子8で左右方向に往復駆動される可動刃13とからなる。可動刃13は、左右一対のねじりコイルばね14・14で固定刃12側へ常に押圧付勢されている。可動刃固定台21は、合成樹脂などからなり、前記振動子8の往復動を受ける受動部21aが設けられている。ホルダー16、固定刃12、ねじりコイルばね14・14、可動刃固定台21および可動刃13は、一体的に組み付けられてユニット化されており、このユニット化されたせん断刃5がヘッド部2に着脱自在に取り付けられる。
【0023】
固定刃12は、その全厚寸法が例えば0.8mmの板体からなり、図4に示すごとく、ホルダー16に突設した4個のかしめ用突起16aを、固定刃12に設けた4個の貫通孔12dにそれぞれ通してかしめることで、ホルダー16に固定される。
【0024】
固定刃12の前端には、先端側に向かうに従って幅が次第に狭くなる複数の櫛状刃15が左右方向に配列されている。固定刃12が固定されるホルダー16には、前記ねじりコイルばね14が取り付けられている。可動刃13が摺動する際の摩擦を軽減するために、固定刃12における可動刃13との摺動面12aには、ハーフエッチング(一方向側からのみのエッチング)によって凹部17が形成されている。この凹部17内には、ホルダー16に突設した一対の突起18・18が固定刃12の貫通孔12c・12cを介して突出している。
【0025】
可動刃13は、その全厚寸法が例えば0.457mmの板体からなり、図5に示すごとくその前端に、先端側に向かうに従って幅が次第に狭くなる複数の櫛状刃20が左右方向に配列されている。可動刃13は、可動刃固定台21に突設したかしめ用突起21bを、可動刃13に設けた貫通孔13cを通してかしめることで、可動刃固定台21に固定される。可動刃固定台21には、前記ねじりコイルばね14の一端部が係止されている(図2参照)。そして、ねじりコイルばね14の押圧付勢力が、可動刃固定台21を介して可動刃13に伝わる。
【0026】
可動刃13には、合成樹脂製のスライドピース(案内体)22用の逃げ穴が設けられており、スライドピース22が、例えばアウトサート成形によって逃げ穴内に形成される。スライドピース22には、前記突起18・18の先端部がそれぞれ嵌入する左右一対の横長のガイド溝22a・22aが設けられている。
【0027】
このガイド溝22a・22aおよび前記突起18・18により、可動刃13は左右方向にのみ往復動可能に案内支持される。また、突起18・18が固定刃12の貫通孔12c・12cを介して突出していることで、固定刃12が突起18・18によってホルダー16によりしっかりと固定される。更に突起18・18は、かしめ用突起21bをかしめる際の位置ずれ防止の効果を有する。
【0028】
スライドピース22は、可動刃13に溶着固定してあってもよい。ガイド溝22a・22aは、貫通孔であってもよい。またスライドピース22を設けずに、可動刃固定台21にガイド溝22a・22aを直接設けて、これに突起18・18を、可動刃13の逃げ穴を介して嵌入させてもよい。突起18・18は、固定刃12に設けてもよい。
【0029】
スライドピース22の下面は、図6に示すごとく、可動刃13における固定刃12との摺動面13a側から固定刃12側へ僅かに突出しているが、スライドピース22の下面は固定刃12の凹部17内に入り込んでおり、スライドピース22と固定刃12との接触が防止されている。凹部17は、図6に示すごとく可動刃13によって蓋がされた状態になって閉空間となり、潤滑油の油溜めの効果を有する。従って、凹部17内に溜まった潤滑油が、凹部17内の突起18・18およびガイド溝22a・22aの嵌合面に供給されやすくなって、可動刃13の往復動をスムーズに行わせることができる。
【0030】
固定刃12と可動刃13とは、それぞれ焼入れ済みの鋼板材、より好ましくは焼入れ済みのマルテンサイト系のステンレス鋼板材などを素材にして、エッチング法により形成する。つまり、例えば先の板材の上下表面に、フォトマスクを介してフィルム状感光膜を焼付現像し、図7および図8に示すごとく、パターニング形成された耐蝕性のレジスト膜25を用いたフォトエッチング法により形成する。この場合のエッチング溶液としては、例えば塩化第二鉄を使用する。なお、パターニング形成されたレジスト膜25は、フォトマスクを用いずにレーザ光を感光膜に直接照射して硬化形成する手法などの種々のレジスト膜25の形成手法が考えられる。
【0031】
前記エッチング法により、固定刃12の各櫛状刃15の左右側面には、図1に示すごとく、固定刃12の厚み方向の中間であって、肌が触れる開放面12bまでの寸法よりも摺動面12aまでの寸法の方が短くなる位置に、エッジ部27がそれぞれ突出形成されている。各櫛状刃15の左右側面は、摺動面12aとエッジ部27との間、およびエッジ部27と開放面12bとの間が、それぞれ凹曲状に形成されている。
【0032】
つまり、固定刃12の櫛状刃15を形成するレジスト膜25は、例えば図7に示すごとく、開放面12b側の隣合う櫛状刃15間の間隔L1が、摺動面12a側の隣合う櫛状刃15間の間隔L2の1.5倍になっている。このレジスト膜25を形成した板材にエッチング溶液を噴射すると、開放面12b側および摺動面12a側の双方から同時にすり鉢状に凹入しながら蝕刻が進行する。
【0033】
この際、前記開放面12b側の間隔L1が摺動面12a側の間隔L2よりも大きい分だけ、開放面12b側の蝕刻の進行度合いが摺動面12a側と比べて大きくなり、開放面12b側から形成された凹曲面と、摺動面12a側から形成された凹曲面との境界が摺動面12a寄りの位置になる。この境界位置が前記エッジ部27の形成位置になる。
【0034】
このエッチングによって、固定刃12の各櫛状刃15には、摺動面12a側の左右に鋭角状の刃先28がそれぞれ形成される。櫛状刃15は、図1に示すごとく、エッジ部27の形成位置の幅と刃先28の形成位置の幅とが実質的に等しくなり、あるいはエッジ部27の形成位置の幅よりも刃先28の形成位置の幅がわずかに狭くなっている。
【0035】
可動刃13の櫛状刃20を形成するレジスト膜25は、例えば図8に示すごとく、固定刃12との摺動面13aの反対側の面である開放面13b側の隣合う櫛状刃20間の間隔L3が、摺動面13a側の隣合う櫛状刃15間の間隔L4の3倍に設定されている。このレジスト膜25を形成した板材にエッチング溶液を噴射すると、櫛状刃20の左右側面はそれぞれ凹曲状に形成されるが、開放面13b側の蝕刻の進行度合いが摺動面13a側と比べてかなり大きいため、開放面13b側から形成される凹曲面と、摺動面13a側から形成される凹曲面との境界がほぼ摺動面13a側の位置になる。尤も、ここでの境界にはエッジが立たない状態になっている。
【0036】
このエッチングによって、可動刃13の各櫛状刃20には、摺動面13a側の左右に鋭角状の刃先29が形成される。図9に示すごとく、この刃先29の角度αは、例えば60°になっており、固定刃12の櫛状刃15の刃先28の角度βよりも小さい。櫛状刃15の刃先28の角度βは、例えば80°になっている。
【0037】
固定刃12の各櫛状刃15の先端部は、図10に示すごとく、開放面12b側から摺動面12a側へ向けて傾斜状に研磨あるいはエッチングされており、図11に示すごとく、櫛状刃15の開放面12b側の幅W1の細くなる度合いが、エッジ部27の形成位置の幅W2の細くなる度合いよりも大きくなっている。これにより、肌に触れる側、すなわち櫛状刃15の開放面12b側の先端のエッジが肌へ引っ掛かることを防止して、スムーズに毛髪9を掻き分けることができ、毛髪9をより確実かつ適切に切断できる。
【0038】
可動刃13の各櫛状刃20の先端部は、図10に示すごとく、開放面13b側から摺動面13a側へ向けて傾斜状に研磨あるいはエッチングされる。また、図5および図12に示すごとく、櫛状刃20の摺動面13a側の先端部20aは、その左右の幅が等しくなって左右の刃先29がほぼ平行になっている。これにより、隣合う櫛状刃20間に入り込んだ毛髪が、刃先29に沿って斜めに抜け出ることを防止している。
【0039】
固定刃12および可動刃13の各摺動面12a・13a側における櫛状刃15・20の基端部には、図4および図5に示すごとく、油溜め凹部10・11がそれぞれ形成されている。これらの油溜め凹部10・11は、固定刃12および可動刃13の外郭線を形成する際にエッチング法で形成する。また、固定刃12および可動刃13は、各櫛状刃15・20のみならず、外郭線や各貫通孔や凹みなどもエッチング法で形成する。つまり、固定刃12および可動刃13の全体が、前述のように平板状のステンレス鋼板材などをエッチング法で形成することによって加工され、これらをプレス加工で形成する場合よりも薄型化が図れる。この結果、コンパクトなせん断刃5を提供することができる。
【0040】
そして、可動刃13が固定刃12に対して左右に往復摺動することで、図13に示すごとく、毛髪9が固定刃12の櫛状刃15の刃先28と、可動刃13の櫛状刃20の刃先29とによって挟み込まれつつ切断される。この際、毛髪9は固定刃12の櫛状刃15の刃先28とエッジ部27とによってほぼまっすぐな状態に支持されるため、可動刃13および固定刃12が毛髪9に対してほぼ直角に喰い込む。従って、毛髪9が斜めになって隣合う固定刃12間から逃げることがなく、毛髪9を確実に切断できることになる。
【図面の簡単な説明】
【図1】本発明のせん断刃を示す図2のA−A線矢視断面図
【図2】本発明のせん断刃が適用されるバリカンの全体の横断平面図
【図3】バリカンの全体の縦断側面図
【図4】ホルダーに固定刃を取り付けた状態を摺動面側から見た平面図
【図5】可動刃固定台に可動刃を取り付けた状態で摺動面側から見た底面図
【図6】主に固定刃側の突起と可動刃側のスライドピースとの関係を示す縦断面図
【図7】固定刃のエッチング加工を説明するための断面図
【図8】可動刃のエッチング加工を説明するための断面図
【図9】固定刃および可動刃の刃先の角度を示す断面図
【図10】固定刃および可動刃の先端部を示す側面図
【図11】固定刃の櫛状刃を開放面側から見た拡大図
【図12】可動刃の櫛状刃を開放面側から見た拡大図
【図13】毛髪の切断状態を説明する断面図
【符号の説明】
5 せん断刃
9 毛髪
12 固定刃
12a 摺動面
12b 開放面
13 可動刃
13a 摺動面
13b 開放面
15 固定刃の櫛状刃
17 凹部
18 突起
20 可動刃の櫛状刃
22 スライドピース
27 エッジ部
28 固定刃の刃先
29 可動刃の刃先
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shearing blade that cuts hair by moving a movable blade back and forth in the left-right direction with respect to a fixed blade.
[0002]
[Prior art]
This type of shearing blade is, for example, as shown in Japanese Patent Publication No. 57-12635, a movable blade having a large number of comb-shaped blades arranged in the left-right direction with respect to a fixed blade in which a large number of comb-shaped blades are arranged in the left-right direction. The hair is cut by reciprocating in the left-right direction.
[0003]
[Problems to be solved by the invention]
In such a shearing blade, cutting edges formed on the sliding contact surfaces of the fixed blade and the movable blade respectively cut the hair while sandwiching and supporting the hair. However, the conventional cutting edge cannot support the hair firmly.
[0004]
For this reason, the hair is slanted, and the hair may come out of the fixed blade or the movable blade or be cut obliquely, and there is a problem that the hair cannot be cut appropriately. In particular, with a comb-like blade in a shear blade of a hair clipper, the width becomes narrower toward the tip side and the gap between adjacent comb-like blades becomes wider, so that the hair easily escapes from between the comb-like blades. Further, it is necessary to prevent wear due to contact between the guide body that guides the reciprocating motion of the movable blade in the left-right direction and the fixed blade.
[0005]
An object of the present invention is to obtain a shearing blade that can cut hair reliably and appropriately. An object of the present invention is to ensure that the hair can be supported in order to maintain high cutting performance. An object of the present invention is to prevent wear due to contact between a guide body that guides a reciprocating motion of a movable blade in the left-right direction and a fixed blade.
[0006]
[Means for Solving the Problems]
As shown in FIGS. 2 to 5, the shear blade targeted by the present invention is fixed with a fixed blade 12 in which a large number of comb-shaped blades 15 are arranged in the left-right direction and a large number of comb-shaped blades 20 arranged in the left-right direction. And a movable blade 13 that reciprocates in the left-right direction with respect to the blade 12. Examples of the shear blade here include a clipper shear blade, an electric razor blade blade, a vellus cutter, an eyebrows cutter, and the like.
[0007]
According to the present invention, in such a shearing blade, as shown in FIG. 1, an edge portion 27 is formed to project at an intermediate position in the thickness direction of each comb-shaped blade 15 of the fixed blade 12, and each comb-shaped blade 15 of the fixed blade 12 is The gap between the edge portion 27 and the sliding surface 12a with respect to the movable blade 12 is formed in a concave shape, and an acute-angled blade edge 28 is formed on the sliding surface 12a side. Here, between the edge portion 27 and the sliding surface 12a includes a case where the concave portion is recessed by etching, a case where the concave portion is curved by polishing, and the like. The edge part 27 does not necessarily need to be sharp, and may have an arc shape in cross section as long as the hair 9 can be supported.
[0008]
More specifically, the comb blade 15 of the fixed blade 12 and the comb blade 20 of the movable blade 13 are provided with cutting edges 28 and 29 on the left and right sides of the sliding surfaces 12a and 13a, respectively. As shown, the angle α of the blade edge 29 of the comb blade 20 of the movable blade 13 is set to be smaller than the angle β of the blade edge of the comb blade 15 of the fixed blade 12.
[0009]
As for the formation position of the edge part 27, as shown in FIG. 1, the distance to the sliding surface 12a is shorter than the distance to the open surface 12b of the fixed blade 15. As shown in FIG. Comb blades 15 of the fixed blade 12 has a width of the formation position of the edge portion 27, and the width of the forming position of the cutting edge 28 has become equal properly.
[0010]
Further, as shown in FIG. 6, a protrusion 18 is disposed in a recess 17 formed on the sliding surface 12a side of the fixed blade 12, and the movable blade 13 has a guide body having a guide groove 22a extending in the left-right direction. 22 is fixed. By inserting the projection 18 into the guide groove 22a, the movable blade 13 is guided so as to reciprocate only in the left-right direction. Here, the guide body 22 is fixed to the movable blade 13 when the guide body 22 is formed in the through-hole or recess provided in the movable blade 13 by outsert molding, and the guide body 22 is formed in the through-hole or recess. This is the case when mating. The guide groove 22a corresponds to a case where the guide groove 22a is formed to be recessed in the guide body 22 and a case where the guide groove 22a is formed to penetrate the guide body 22.
[0011]
The tip portion 20a of the comb-shaped blade 20 of the movable blade 13, the left and right edge 29 as shown in FIGS. 5 and 12 have become flat row.
[0012]
[Effects of the invention]
When the hair 9 is cut by the fixed blade 12 and the movable blade 13, the shear blade according to the present invention has a hair tip 28 and an edge portion 27 of the comb blade 15 of the fixed blade 12 as shown in FIG. 13. Is supported at two points, so that the hair 9 is firmly supported. Accordingly, it is possible to prevent the hair 9 from being inclined and escaping from between the adjacent comb-shaped blades 15 of the fixed blade 12 and the hair 9 being cut obliquely. As a result, the hair 9 is cut reliably and appropriately.
[0013]
If the angle α of the cutting edge 29 of the comb-shaped blade 20 of the movable blade 13 is smaller than the angle β of the cutting edge 28 of the comb-shaped blade 15 of the fixed blade 12, the comb-shaped blade of the movable blade 13 that greatly contributes to the cutting of the hair 9. The 20 cutting edges 29 become sharp and the hair 9 can be accurately cut, and the cutting performance can be maintained high.
[0014]
In addition, because the angle β of the cutting edge 28 of the comb-shaped blade 15 of the fixed blade 12 is large, the contact area between the cutting edge 28 and the hair 9 increases, and the hair 9 is inserted into the cutting edge of the comb-shaped blade 15 of the fixed blade 12. 28 and the edge part 27 can support more reliably.
[0015]
If the distance to the sliding surface 12a is shorter than the distance to the open surface 12b of the fixed blade 15 in the formation position of the edge portion 27, the edge portion 27 and the blade edge 28 are close to each other. It is suppressed that 9 is curving between the edge part 27 and the blade edge | tip 28, and becomes diagonal with respect to the blade edge | tip 28, and contributes to the appropriate cutting | disconnection of the hair 9. FIG.
[0016]
Comb blades 15 of the fixed blade 12, when the width of the forming position of the width and the cutting edge 28 of the forming position of the edge portion 27 is made equal properly, the cutting edge 28 of the comb-shaped blade 15 of the fixed blade 12 and the hair 9 It can be supported substantially straight by the edge portion 27, and the hair 9 can be reliably prevented from being cut obliquely.
[0017]
When the protrusion 18 of the fixed blade 12 that is fitted in the guide groove 22a of the guide body 22 of the movable blade 13 and guides the reciprocating movement of the movable blade 13 in the left-right direction is disposed in the concave portion 17 of the fixed blade 12, Even if the guide body 22 protrudes from the movable blade 13 side to the fixed blade 12 side, since the guide body 22 enters the recess 17 of the fixed blade 12, contact between the guide body 22 and the fixed blade 12 is prevented. It is possible to prevent wear due to contact with the surface.
[0018]
The protrusion 18 is inserted into the guide groove 22a, so that the reciprocating motion of the movable blade 13 in the left-right direction is guided, and the movable blade 13 can perform the reciprocating motion accurately, thereby improving the sharpness of the shearing blade. be able to. Moreover, if the concave portion 17 is formed on the sliding surface 12a side of the fixed blade 12, the contact area between the fixed blade 12 and the movable blade 13 is reduced, so that the fixed blade 12 and the movable blade 13 are pressed against each other. Even if the urging force of the spring for this purpose is reduced, it can be surely brought into press contact. Furthermore, since the contact area is reduced, the frictional resistance can be reduced and the power consumption can be reduced.
[0019]
When the comb-shaped blade 20 tip left and right edge 29 of the 20a in the movable blade 13 is in the flat row, comb-shaped blade 20 between the hair 9 that enters the adjacent can come off obliquely along the edge 29 such as The hair 9 can be cut reliably.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The drawing shows an embodiment of a shearing blade according to the present invention. In FIG. 2, a motor 3, a battery 4, and the like are arranged inside a cylindrical main body case 1. A shearing blade 5 targeted by the present invention is disposed on the head portion 2 of the main body case 1. On the front surface of the main body case 1, there is a start switch 6 for turning on / off the energization of the motor 3 as shown in FIG.
[0021]
The main body case 1 has a driving mechanism for converting the rotational driving force of the motor 3 into a reciprocating motion in the left-right direction and transmitting it to the shearing blade 5. This drive mechanism is composed of an eccentric cam 7 connected to the output shaft of the motor 3 and a vibrator 8 connected to the shearing blade 5. The vibrator 8 protrudes from the eccentric position of the eccentric cam 7. The crankpin 7a reciprocates in the left-right direction.
[0022]
The shear blade 5 includes a fixed blade 12 fixedly supported on the head portion 2 of the main body case 1 via a holder 16 made of synthetic resin and the like, and the vibrator 8 via a movable blade fixing base 21 inside the upper surface of the holder 16. And a movable blade 13 that is reciprocated in the left-right direction. The movable blade 13 is always pressed and biased toward the fixed blade 12 by a pair of left and right torsion coil springs 14 and 14. The movable blade fixing base 21 is made of synthetic resin or the like, and is provided with a passive portion 21 a that receives the reciprocating motion of the vibrator 8. The holder 16, the fixed blade 12, the torsion coil springs 14, 14, the movable blade fixing base 21 and the movable blade 13 are integrally assembled into a unit, and the unitized shear blade 5 is attached to the head unit 2. Removably attached.
[0023]
The fixed blade 12 is a plate having a total thickness of, for example, 0.8 mm. As shown in FIG. 4, four caulking protrusions 16 a protruding from the holder 16 are provided on the fixed blade 12. The holder 16 is fixed by caulking through the through holes 12d.
[0024]
At the front end of the fixed blade 12, a plurality of comb-shaped blades 15 whose width gradually decreases toward the front end side are arranged in the left-right direction. The torsion coil spring 14 is attached to a holder 16 to which the fixed blade 12 is fixed. In order to reduce friction when the movable blade 13 slides, a concave portion 17 is formed on the sliding surface 12a of the fixed blade 12 with the movable blade 13 by half etching (etching from only one side). Yes. In the recess 17, a pair of protrusions 18, 18 protruding from the holder 16 protrude through the through holes 12 c, 12 c of the fixed blade 12.
[0025]
The movable blade 13 is made of a plate having a total thickness of, for example, 0.457 mm. As shown in FIG. 5, a plurality of comb-shaped blades 20 whose width gradually decreases toward the front end side as shown in FIG. Has been. The movable blade 13 is fixed to the movable blade fixing base 21 by caulking a caulking projection 21 b provided on the movable blade fixing base 21 through a through hole 13 c provided in the movable blade 13. One end of the torsion coil spring 14 is locked to the movable blade fixing base 21 (see FIG. 2). Then, the pressing urging force of the torsion coil spring 14 is transmitted to the movable blade 13 via the movable blade fixing base 21.
[0026]
The movable blade 13 is provided with a relief hole for a slide piece (guide body) 22 made of synthetic resin, and the slide piece 22 is formed in the relief hole by, for example, outsert molding. The slide piece 22 is provided with a pair of left and right lateral guide grooves 22a and 22a into which the tip ends of the protrusions 18 and 18 are respectively fitted.
[0027]
The movable blade 13 is guided and supported by the guide grooves 22a and 22a and the projections 18 and 18 such that the movable blade 13 can reciprocate only in the left-right direction. Further, since the protrusions 18 and 18 protrude through the through holes 12 c and 12 c of the fixed blade 12, the fixed blade 12 is firmly fixed to the holder 16 by the protrusions 18 and 18. Further, the protrusions 18 and 18 have an effect of preventing misalignment when the caulking protrusion 21b is caulked.
[0028]
The slide piece 22 may be welded and fixed to the movable blade 13. The guide grooves 22a and 22a may be through holes. Further, without providing the slide piece 22, the guide grooves 22 a and 22 a may be directly provided in the movable blade fixing base 21, and the projections 18 and 18 may be fitted into the guide grooves 22 and 18 through the escape holes of the movable blade 13. The protrusions 18 and 18 may be provided on the fixed blade 12.
[0029]
As shown in FIG. 6, the lower surface of the slide piece 22 slightly protrudes from the sliding surface 13 a side of the movable blade 13 with the fixed blade 12 to the fixed blade 12 side. It has entered into the recess 17 and the contact between the slide piece 22 and the fixed blade 12 is prevented. As shown in FIG. 6, the concave portion 17 is closed by the movable blade 13 to become a closed space, and has an effect of retaining the lubricating oil. Accordingly, the lubricating oil accumulated in the recess 17 is easily supplied to the fitting surfaces of the protrusions 18 and 18 and the guide grooves 22a and 22a in the recess 17, so that the reciprocating motion of the movable blade 13 can be performed smoothly. it can.
[0030]
The fixed blade 12 and the movable blade 13 are formed by an etching method using a quenched steel plate material, more preferably a quenched martensitic stainless steel plate material as a raw material. That is, for example, a film-like photosensitive film is baked and developed on the upper and lower surfaces of the previous plate material through a photomask, and a photo-etching method using a corrosion-resistant resist film 25 formed by patterning as shown in FIGS. To form. As the etching solution in this case, for example, ferric chloride is used. Various resist film 25 forming methods such as a method of directly irradiating the photosensitive film with a laser beam without using a photomask and curing the resist film 25 may be considered.
[0031]
By the etching method, the left and right side surfaces of each comb-like blade 15 of the fixed blade 12 are slid more than the dimension up to the open surface 12b which is in the middle of the thickness direction of the fixed blade 12 and touches the skin as shown in FIG. Edge portions 27 are formed so as to project at positions where the dimension to the moving surface 12a becomes shorter. The left and right side surfaces of each comb-shaped blade 15 are formed in a concave shape between the sliding surface 12a and the edge portion 27 and between the edge portion 27 and the open surface 12b, respectively.
[0032]
That is, in the resist film 25 forming the comb-shaped blade 15 of the fixed blade 12, for example, as shown in FIG. 7, the interval L1 between the adjacent comb-shaped blades 15 on the open surface 12b side is adjacent on the sliding surface 12a side. The distance L2 between the comb blades 15 is 1.5 times. When an etching solution is sprayed onto the plate material on which the resist film 25 is formed, etching proceeds while being recessed into a mortar shape simultaneously from both the open surface 12b side and the sliding surface 12a side.
[0033]
At this time, as the distance L1 on the open surface 12b side is larger than the distance L2 on the slide surface 12a side, the progress of the etching on the open surface 12b side becomes larger than that on the slide surface 12a side, and the open surface 12b. The boundary between the concave curved surface formed from the side and the concave curved surface formed from the sliding surface 12a side is a position closer to the sliding surface 12a. This boundary position is the position where the edge portion 27 is formed.
[0034]
By this etching, each of the comb blades 15 of the fixed blade 12 is formed with acute-angled blade edges 28 on the left and right sides on the sliding surface 12a side. As shown in FIG. 1, the comb-shaped blade 15 has substantially the same width at the formation position of the edge portion 27 and the width of the formation position of the blade edge 28, or the width of the cutting edge 28 is larger than the width of the formation position of the edge portion 27. The width of the formation position is slightly narrowed.
[0035]
The resist film 25 forming the comb-shaped blade 20 of the movable blade 13 is adjacent to the adjacent comb-shaped blade 20 on the open surface 13b side which is the surface opposite to the sliding surface 13a with the fixed blade 12, as shown in FIG. The interval L3 is set to be three times the interval L4 between the adjacent comb-shaped blades 15 on the sliding surface 13a side. When the etching solution is sprayed onto the plate material on which the resist film 25 is formed, the left and right side surfaces of the comb-shaped blade 20 are formed in concave shapes, but the degree of progress of the etching on the open surface 13b side is compared with that on the sliding surface 13a side. Therefore, the boundary between the concave curved surface formed from the open surface 13b side and the concave curved surface formed from the sliding surface 13a side is almost at the position on the sliding surface 13a side. However, there is no edge at the boundary here.
[0036]
By this etching, sharp blade edges 29 are formed on each comb blade 20 of the movable blade 13 on the left and right sides on the sliding surface 13a side. As shown in FIG. 9, the angle α of the cutting edge 29 is 60 °, for example, and is smaller than the angle β of the cutting edge 28 of the comb-shaped blade 15 of the fixed blade 12. The angle β of the cutting edge 28 of the comb blade 15 is, for example, 80 °.
[0037]
The tip of each comb-like blade 15 of the fixed blade 12 is polished or etched in an inclined manner from the open surface 12b side to the sliding surface 12a side as shown in FIG. The degree of narrowing of the width W1 on the open surface 12b side of the blade 15 is greater than the degree of narrowing of the width W2 of the formation position of the edge portion 27. As a result, the side touching the skin, that is, the edge at the tip of the open surface 12b side of the comb blade 15 can be prevented from being caught on the skin, and the hair 9 can be scraped smoothly. Can be cut.
[0038]
As shown in FIG. 10, the tip of each comb blade 20 of the movable blade 13 is polished or etched in an inclined manner from the open surface 13b side to the sliding surface 13a side. Further, as shown in FIGS. 5 and 12, the left and right blade edges 29 of the tip 20a on the sliding surface 13a side of the comb-like blade 20 are equal and the left and right blade edges 29 are substantially parallel. This prevents hair that has entered between adjacent comb-shaped blades 20 from slipping out obliquely along the blade edge 29.
[0039]
As shown in FIGS. 4 and 5, oil sump recesses 10 and 11 are formed at the base ends of the comb-shaped blades 15 and 20 on the sliding surfaces 12a and 13a side of the fixed blade 12 and the movable blade 13, respectively. Yes. These oil sump recesses 10 and 11 are formed by an etching method when the outer lines of the fixed blade 12 and the movable blade 13 are formed. The fixed blade 12 and the movable blade 13 are formed not only by the comb-shaped blades 15 and 20, but also by an etching method such as outlines, through-holes, and dents. That is, the entire fixed blade 12 and movable blade 13 are processed by forming a flat stainless steel plate material or the like by the etching method as described above, and can be made thinner than the case of forming them by press processing. As a result, a compact shear blade 5 can be provided.
[0040]
Then, as the movable blade 13 reciprocally slides left and right with respect to the fixed blade 12, the hair 9 has a cutting edge 28 of the comb-shaped blade 15 of the fixed blade 12 and a comb-shaped blade of the movable blade 13 as shown in FIG. 13. It is cut while being sandwiched between 20 cutting edges 29. At this time, since the hair 9 is supported in a substantially straight state by the cutting edge 28 and the edge portion 27 of the comb-shaped blade 15 of the fixed blade 12, the movable blade 13 and the fixed blade 12 eat at a substantially right angle with respect to the hair 9. Include. Accordingly, the hair 9 is not inclined and escapes from between the adjacent fixed blades 12, and the hair 9 can be cut reliably.
[Brief description of the drawings]
1 is a cross-sectional view taken along line AA in FIG. 2 showing the shear blade of the present invention. FIG. 2 is a cross-sectional plan view of the entire clipper to which the shear blade of the present invention is applied. Longitudinal side view [Figure 4] Plan view of the fixed blade attached to the holder as seen from the sliding surface side [Figure 5] Bottom view of the movable blade fixed base as seen from the sliding surface side with the movable blade attached FIG. 6 is a longitudinal sectional view mainly showing the relationship between the protrusion on the fixed blade side and the slide piece on the movable blade side. FIG. 7 is a cross-sectional view for explaining the etching process of the fixed blade. FIG. 9 is a cross-sectional view illustrating the angle of the blade edge of the fixed blade and the movable blade. FIG. 10 is a side view illustrating the tip of the fixed blade and the movable blade. Enlarged view of the blade as viewed from the open surface side. [Fig. 12] Enlarged view of the comb blade of the movable blade as viewed from the open surface side. Cross-sectional view illustrating a disconnected state EXPLANATION OF REFERENCE NUMERALS
5 Shearing blade 9 Hair 12 Fixed blade 12a Sliding surface 12b Open surface 13 Movable blade 13a Sliding surface 13b Open surface 15 Fixed blade comb-shaped blade 17 Recess 18 Projection 20 Movable blade comb-shaped blade 22 Slide piece 27 Edge portion 28 Fixed blade edge 29 Movable blade edge

Claims (6)

多数の櫛状刃(15)が左右方向に配列された固定刃(12)と、多数の櫛状刃(20)が左右方向に配列されて前記固定刃(12)に対し左右方向に往復摺動する可動刃(13)とを有するせん断刃において、固定刃(12)の各櫛状刃(15)の厚み方向の中間位置に、エッジ部(27)が突出形成されており、固定刃(12)の各櫛状刃(15)は、エッジ部(27)と可動刃(12)に対する摺動面(12a)との間が凹曲状に形成されていて、摺動面(12a)側に鋭角状の刃先(28)が形成されていることを特徴とするせん断刃。A fixed blade (12) in which a large number of comb-shaped blades (15) are arranged in the left-right direction, and a large number of comb-shaped blades (20) are arranged in the left-right direction to reciprocate in the left-right direction with respect to the fixed blade (12). at a shear blade and a movable blade (13) for moving, at an intermediate position in the thickness direction of the comb-shaped blades (15) of the fixed blade (12), the edge portion (27) is formed to project, the fixed blade ( each comb blade 12) (15), between the sliding surface (12a) edge portion (27) relative to the movable blade (12) is formed in the concave shape, the sliding surface (12a) side A shearing blade characterized in that an acute-angled blade edge (28) is formed on the blade. 固定刃(12)の櫛状刃(15)および可動刃(13)の櫛状刃(20)には、各々の摺動面(12a・13a)側の左右に刃先(28・29)が付けられており、可動刃(13)の櫛状刃(20)の刃先(29)の角度(α)が、固定刃(12)の櫛状刃(15)の刃先(28)の角度(β)よりも小さく設定されている請求項1記載のせん断刃。The comb blade (15 ) of the fixed blade (12) and the comb blade (20) of the movable blade (13) are provided with cutting edges (28, 29) on the left and right sides of the sliding surfaces (12a, 13a). The angle (α) of the blade edge (29) of the comb blade (20) of the movable blade (13) is the angle (β) of the blade edge (28) of the comb blade (15) of the fixed blade (12 ). The shearing blade according to claim 1, wherein the shearing blade is set smaller. エッジ部(27)の形成位置は、固定刃(15)の開放面(12b)までの距離よりも摺動面(12a)までの距離の方が短くなっている請求項1記載のせん断刃。The shearing blade according to claim 1, wherein the edge portion (27) is formed such that the distance to the sliding surface (12a) is shorter than the distance to the open surface (12b ) of the fixed blade (15) . 固定刃(12)の櫛状刃(15)は、エッジ部(27)の形成位置の幅と、刃先(28)の形成位置の幅とが等しくなっている請求項1記載のせん断刃。Comb-shaped blade of the fixed blade (12) (15), the width of the forming position of the edge portion (27), shearing blade according to claim 1, wherein the width of the forming position of the cutting edge (28) becomes equal properly. 固定刃(12)の摺動面(12a)側に形成した凹部(17)内に、突起(18)が配置されており、可動刃(13)には、左右方向に延びる案内溝(22a)を有する案内体(22)を固定してあり、前記案内溝(22a)に前記突起(18)が嵌入することにより、固定刃(12)に対して可動刃(13)が左右方向にのみ往復動するよう案内されている請求項1記載のせん断刃。A protrusion (18) is disposed in a recess (17) formed on the sliding surface (12a) side of the fixed blade (12) , and a guide groove (22a) extending in the left-right direction is provided in the movable blade (13 ). A guide body (22) having a fixed shape is fixed, and the protrusion (18) is inserted into the guide groove (22a) , whereby the movable blade (13) reciprocates only in the left-right direction with respect to the fixed blade (12) . The shear blade according to claim 1, wherein the shear blade is guided to move. 可動刃(13)の櫛状刃(20)の先端部(20a)は、左右の刃先(29)が平行になっている請求項1記載のせん断刃。Comb blade (20) tip of (20a), the shearing blade according to claim 1, wherein the left and right edge (29) is in a flat row of the movable blade (13).
JP2001185560A 2001-06-19 2001-06-19 Shear blade Expired - Lifetime JP4766536B2 (en)

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KR100680694B1 (en) * 2002-02-07 2007-02-08 야스아키 오쿠야 A cutter structure of a crushing-breaking apparatus for useless casting products of runners and weirs
KR200316122Y1 (en) * 2003-03-06 2003-06-12 오태준 An etching blade of electric shaver
DE102005002896A1 (en) * 2005-01-21 2006-07-27 Braun Gmbh Electric hair clipper
JP2009274170A (en) * 2008-05-14 2009-11-26 Dainippon Printing Co Ltd Rotary blade for forming perforations
KR200474150Y1 (en) * 2011-10-27 2014-08-26 오태준 Etching process razor-net
JP6341379B2 (en) * 2014-09-30 2018-06-13 パナソニックIpマネジメント株式会社 Trimmer blade and trimmer equipped with the same
KR101616069B1 (en) * 2014-11-28 2016-05-03 (주)파인테크 Method of manufacturing flexible fine dies using laser exposure

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