JP3725771B2

JP3725771B2 - Replaceable blade razor replacement blade and replaceable blade razor holder

Info

Publication number: JP3725771B2
Application number: JP2000299954A
Authority: JP
Inventors: 正幸上野; 英二荻
Original assignee: Feather Safety Razor Co Ltd
Current assignee: Feather Safety Razor Co Ltd
Priority date: 2000-09-29
Filing date: 2000-09-29
Publication date: 2005-12-14
Anticipated expiration: 2020-09-29
Also published as: JP2002102554A

Description

【０００１】
【発明の属する技術分野】
本発明は、理容室において顔剃り等に使用される替刃式剃刀の替刃及び替刃式剃刀のホルダに関するものである。
【０００２】
【従来の技術】
この種の替刃式剃刀の替刃（以下、替刃という）は、同替刃を挟着可能なホルダに挟着し、替刃式剃刀を構成する。そして、このような替刃式剃刀で顔剃りを行う場合には、替刃の刃体を皮膚表面に対して所定角度に立たせた状態で刃先を皮膚表面に接触させ、替刃を皮膚表面に沿って移動させている。
【０００３】
【発明が解決しようとする課題】
ところで、替刃式剃刀で顔剃りを行う場合には剃り残し、肌荒れが発生しない事はもちろん、剃り心地の良さも要求される。一般に、安全上、皮膚とホルダと替刃の皮膚表面に対する角度（対皮角度）を大きくして（ホルダを立てて）使用するため、剃り残し、肌荒れ、血吹きの心配もあり、対皮角度を小さくして剃ることが推奨されている。しかし、ホルダ重量と運行荷重が刃先の一点に集中するため、肌荒れ、血吹きが完全に防止できるわけではない。
【０００４】
本発明は、替刃式剃刀の替刃の皮膚に対する角度を安定することができ、剃り心地を良くし、剃り残し、肌荒れのない顔剃りをすることができる替刃式剃刀の替刃を提供することにある。
【０００５】
本発明のその他の目的は、前記替刃の皮膚に対する角度を安定することができ、剃り心地を良くし、剃り残し、肌荒れのない顔剃りをすることができる替刃式剃刀の替刃を挟着する替刃式剃刀のホルダを提供することにある。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、請求項１に記載の発明は、替刃式剃刀の替刃において、刃体が保持部材にて保持されるとともに、前記保持部材の一端部から前記刃体の刃先が突出され、前記保持部材の刃先側端部は刃体を挟持し、同保持部材の刃先側端部近傍は刃体の両側面に対して離間し、同保持部材の中間部は刃体の両側面に対して前記刃先側端部近傍より近接し、同保持部材の背側端部近傍は刃体の両側面に対して前記中間部より離間し、前記保持部材における刃体の刃先側端部近傍が、反刃体側へ向け膨出した皮膚押圧部として構成されたことを要旨とする。
【０００７】
請求項２に記載の発明は、替刃式剃刀の替刃において、刃体が保持部材にて保持されるとともに、前記保持部材の一端部から前記刃体の刃先が突出され、前記保持部材における刃体の刃先側端部近傍が、反刃体側へ向け膨出した皮膚押圧部として構成され、当該皮膚押圧部には、皮膚表面との接触面積を少なくするための１以上の接触面積低減部が設けられていることを要旨とする。
【０００８】
請求項３に記載の発明は、請求項１又は請求項２において、前記刃体の刃先及び刃体中心線を通過する仮想平面と、前記刃先及び前記皮膚押圧部の外面に接する平面とがなす角度を２２度〜３２度の範囲としたことを要旨とする。
【０００９】
請求項４に記載の発明は、前記請求項１乃至請求項３のうちいずれか１項に記載の替刃式剃刀の替刃を挟着可能な替刃式剃刀のホルダであって、同ホルダには、替刃式剃刀の替刃を挟着する刃体挟着部を備え、ホルダに前記替刃を取着した状態で、替刃の刃先から延びホルダの外側面に接する接線と替刃の中心線とのなす角度は、替刃の刃先から皮膚押圧部の外側面に接する接線と前記中心線とのなす角度よりも小さくなるように、ホルダの外側面を形成したことを要旨とする。
【００１０】
請求項５に記載の発明は、請求項４に記載の替刃式剃刀のホルダにおいて、前記刃体挟着部の挟着側端部近傍には替刃側へ向け突出する突出部を備え、前記突出部にて、前記替刃式剃刀の替刃の側方に設けられた替刃凹部を挟着することを要旨とする。
【００１１】
請求項６に記載の発明は、請求項４に記載の替刃式剃刀のホルダにおいて、前記刃体挟着部の挟着側端部には窪み部を備え、前記窪み部にて、前記替刃式剃刀の替刃の側方に設けられた凸部の一部を覆うことを要旨とする。
【００１３】
（作用）
従って、請求項１に記載の発明においては、皮膚表面の毛を剃る際には、皮膚押圧部と刃体の刃先とを皮膚表面に接触させる。すると、皮膚表面には皮膚押圧部と刃体の刃先との両方が接触するため、刃体の刃先及び刃体の中心線を通過する仮想平面と皮膚表面とのなす角度は安定し、剃り心地と剃り味が良くなる。
【００１４】
又、皮膚押圧部を皮膚表面に対して押圧すると、皮膚押圧部にて押圧された部分の皮膚は引っ張られた状態となり、その結果、刃体の刃先前方に位置する毛は立ち上がる。そして、前記皮膚押圧部を皮膚表面に対して接触させたままの状態で刃体を前方へ移動させると、前記立ち上がった毛は刃体の刃先にて根元から剃られる。
【００１５】
さらに、保持部材に設けた皮膚押圧部と刃体の刃先とを皮膚表面に接触させると、刃体の刃先及び刃体の中心線を通過する仮想平面と皮膚表面とのなす角度は安定する。又、保持部材に設けた皮膚押圧部を皮膚表面に押圧することで刃体の刃先前方に位置する毛は立ち上がる。
【００１６】
加えて、替刃式剃刀の替刃を替刃式剃刀に取り付ける際には、保持部材の中間部を替刃式剃刀の刃体挟着部に挟着させる。
【００１７】
請求項２に記載の発明においては、皮膚押圧部には接触面積低減部が設けられている。その結果、皮膚押圧部を皮膚表面に対して接触させたままの状態で刃体を前方へ移動させた際に、皮膚押圧部は皮膚表面に対する接触面積が接触面積低減部を持たない場合と比べて低減され滑りがよくなる。
【００１８】
請求項３に記載の発明においては、請求項１又は請求項２に記載の作用に加えて、刃体の刃先及び刃体の中心線を通過する仮想平面と皮膚表面とのなす角度を、前記刃体の刃先及び刃体の中心線を通過する仮想平面と刃先及び前記皮膚押圧部に接する平面とがなす角度より小さくすると、皮膚押圧部は皮膚表面を押圧する。
【００１９】
請求項４に記載の発明においては、替刃式剃刀のホルダの刃体挟着部に替刃式剃刀の替刃を挟着する。すると、替刃の刃先から延びホルダの外側面に接する接線と替刃の中心線とのなす角度が、替刃の刃先から皮膚押圧部の外側面に接する接線と前記中心線とのなす角度よりも小さくなる。
【００２０】
この結果、替刃式剃刀のホルダの外側面と、替刃の刃先とを皮膚表面に接触させると、皮膚押圧部は皮膚表面を押圧する。すると、皮膚押圧部にて押圧された部分の皮膚は引っ張られた状態となり、替刃の刃先前方に位置する毛は立ち上がる。そして、前記皮膚押圧部を皮膚表面に対して接触させたままの状態で刃体を前方へ移動させると、前記立ち上がった毛は刃体の刃先にて根元から剃られる。また、替刃式剃刀のホルダの外側面を皮膚表面に接触させることで、替刃の刃先の皮膚に対する角度が安定する。
【００２１】
請求項５に記載の発明においては、請求項４に記載の作用に加えて、刃体挟着部の突出部にて替刃式剃刀の替刃の替刃凹部が挟着される。
請求項６に記載の発明においては、請求項４に記載の作用に加えて、替刃式剃刀のホルダは、その刃体挟着部にて替刃式剃刀の替刃を挟着すると、前記刃体挟着部の窪み部が替刃式剃刀の替刃の凸部の一部を覆う。
【００２２】
【発明の実施の形態】
以下、本発明を具体化した第１実施形態を図面に従って説明する。
図１は替刃式剃刀を示す斜視図である。替刃式剃刀１はホルダ２と同ホルダ２に挟持された替刃３とを備えている。ホルダ２は替刃式剃刀のホルダに相当し、替刃３は替刃式剃刀の替刃に相当する。ホルダ２は柄部４と固定挟着部材５と可動挟着板６とを備えている。固定挟着部材５の先端部には固定挟着部７が形成されている。前記固定挟着部７に対向する位置には可動挟着板６が設けられており、両者６，７の協働により替刃３が挟着されている。
【００２３】
図２に示すように、固定挟着部７は、替刃３（図２においては図示しない）が位置決めされつつ載置される刃体挟着部１１と、可動挟着板６の後記する支軸３２，３３が回動自在に支持される支持筒１２，１３と、バネ装着部１４と、バネ装着部１４に装着されている板バネ１５とを備えている。図２，３に示すように、刃体挟着部１１は、固定挟着部７における上下方向中央近傍から下側縁部にかけて形成されおり、その挟着側端部（下部）近傍には、基端側から先端側に延び、かつ湾曲状に突出する突出部１１ａが形成されている。そして、刃体挟着部１１の挟着側端部近傍に突出部１１ａが形成されることにより、刃体挟着部１１の背側端部（上部）は湾曲した凹部１１ｂが形成されている。
【００２４】
前記刃体挟着部１１の最上部には、上下方向への替刃３の移動を制限するための係止突条部１６が形成されている。なお、固定挟着部７の基端方向（図２においては左側）への替刃３の移動は、可動挟着板６を係止する壁状部１７によって制限されている。
【００２５】
又、係止突条部１６の上面には、固定挟着部７の基端側から先端側に延びる断面半円状のガイド溝１８が形成されており、可動挟着板６の支軸３２，３３は、このガイド溝１８に案内されつつ支持筒１２，１３に到達する。支持筒１２，１３は、断面半円状のガイド溝１８の先端側、及び基端側において、その開口部が先基端側方向を向く筒状体によって形成されており、先端側の支持筒１２は、支軸３２の被係止部４１を係止するために基端側の支持筒１３よりも短く形成されている。
【００２６】
バネ装着部１４は固定挟着部７における上側縁部近傍に凹設され、同バネ装着部１４には板バネ１５がバネ装着突起１９及び係止ワッシャ２１によって遊動自在に装着されている。
【００２７】
可動挟着板６は、前記固定挟着部７の刃体挟着部１１との協働により替刃３を挟着する刃体挟着部３１と、支持筒１２，１３に挿嵌される支軸３２，３３と、板バネ１５によって押圧される被押圧部３４とを備えている。
【００２８】
刃体挟着部３１は、可動挟着板６における上下方向中央近傍から下側縁部にかけて形成されおり、その挟着側端部（下部）近傍には基端側から先端側に延びる湾曲状の突出部３１ａが形成されている。そして、刃体挟着部３１の挟着側端部近傍に突出部３１ａが形成されることにより、刃体挟着部３１の背側端部（上部）は湾曲した凹部３１ｂが形成されている。
【００２９】
前記刃体挟着部３１の最上部には、前記係止突条部１６と対向する係止突条部３５が形成されている。係止突条部３５の上面には、可動挟着板６の基端側から先端側に延びる断面半円状のガイド溝３６が形成されており、このガイド溝３６と支持筒１２，１３とが係合した状態でスライドされることにより、各支軸３２，３３が各支持筒１２，１３に案内される。
【００３０】
支軸３２，３３は、支持筒１２，１３に挿嵌される軸部３７，３８と、軸部３７，３８を可動挟着板６に固定する固定部３９，４０とから構成されており、ガイド溝３６の先端側、及び基端側において、軸部３７，３８が基端側を向くように配設されている。そして、先端側に位置する支軸３２の軸部３７の周囲には、先端側の支持筒１２に確実に係止されるための被係止部４１が形成されている。この被係止部４１は、支軸３２における軸部３７の先端近傍に軸部３７が有する断面径よりも大きな断面径を有するように形成されている。
【００３１】
そして、軸部３７，３８が支持筒１２，１３に挿嵌され、板バネ１５の弾性力によって、両者１２，３７の軸が軸の径方向にずれるのに伴って、被係止部４１が支持筒１２に係止されている。前記固定挟着部７の反可動挟着板側側面である固定挟着部外側面７ａ、及び前記可動挟着板６の反固定挟着部側側面である可動挟着板外側面６ａにおいて、背側端部近傍から挟着側端部に亘り外側に膨らんだ湾曲面が形成されており、その曲率半径は４０mmに設定されている。なお、この曲率半径は３０mm〜５０mmの範囲において設定可能であるが、より望ましい範囲は３５mm〜４５mmであり、最も好適な範囲は３９mm〜４１mmである。
【００３２】
そして、支持筒１２，１３に挿嵌された軸部３７，３８を支点として、板バネ１５の弾性力によって、可動挟着板６の上側縁部近傍と、固定挟着部７の上側縁部近傍との間が押し広げられる。この結果、替刃３の後述する凹曲部５３ａは刃体挟着部１１の突出部１１ａ及び刃体挟着部３１の突出部３１ａに挟着されている。又、替刃３の後述する背側端部近傍は刃体挟着部１１の凹部１１ｂ及び刃体挟着部３１の凹部３１ｂに係止されている。
【００３３】
次に、替刃３について説明する。
図４，５（ａ），５（ｂ）に示すように、替刃３は刃体５２と同刃体５２を挟持する保持部材としての背金５３にて構成されている。
【００３４】
刃体５２は全体が矩形状をなすステンレス製板からなり、図５（ａ），（ｂ）において刃体５２の下端部が刃先５４となっている。前記刃体５２の背金５３に覆われた部分には２つの長孔５５ａ，５５ｂが同刃体５２の長手方向において所定間隔を隔てて形成されている。また、前記長孔５５ａ，５５ｂが形成された位置に対応する背金５３の両方の側部にはそれぞれ長孔５５ａ，５５ｂと同型状の長孔５６ａ，５６ｂが形成されている。
【００３５】
前記背金５３の厚さは３mmに設定されている。これによって、刃体５２の強度を大幅に向上させ、剃毛の際に発生する刃先５４のビビリ（振動）を少なくできる。この背金５３の厚さは、刃体５２の厚みに応じて任意に変更することができる。図５（ａ），（ｂ）に示すように、前記背金５３の一方側において、長孔５６ａ，５６ｂの背側開口縁部から刃先側へ向け係止片５７ａ，５７ｂがそれぞれ突出形成されている。
【００３６】
前記各係止片５７ａ，５７ｂは背金５３の外方から刃体５２側に向けて折り曲げ加工され、各長孔５５ａ，５５ｂの上内縁部に当接されている。各長孔５５ａ，５５ｂの上内縁部に係止片５７ａ，５７ｂが当接係止することにより刃体５２は上方に移動し、刃体５２の背部５２ａは背金５３の上部に当接されている。従って、刃先５４は上下方向の移動が規制されている。
【００３７】
背金５３は前記刃体５２の背部５２ａに対応する位置にて断面Ｕ字形状をなすように湾曲形成され、刃体５２の背部５２ａが当接されている。前記背金５３の刃先側端部と背部との中間部は刃体５２の両側面に対して背側端部近傍よりも内方に位置して近接した凹曲部５３ａが形成されている。前記凹曲部５３ａは保持部材の中間部及び替刃凹部に相当する。又、前記背金５３の刃先側端部（挟着側端部）近傍は刃体５２の両側面に対して前記凹曲部５３ａよりも外方へ位置して離間した皮膚押圧部としての膨出湾曲した凸曲部５３ｂが形成されている。背金５３の刃先側端部は刃体５２を挟持している。
【００３８】
前記凹曲部５３ａの曲率半径は８mmに設定されており、前記凸曲部５３ｂの曲率半径は２mmに設定されている。なお、前記凹曲部５３ａの曲率半径は７mm〜１０mmの範囲において設定可能であるが、より望ましい範囲は７．５mm〜９mmであり、最も好適な範囲は７．８mm〜８．２mmである。又、前記凸曲部５３ｂの曲率半径は１．５mm〜５mmの範囲において設定可能であるが、より望ましい範囲は２mm〜３mmであり、最も好適な範囲は１．９mm〜２．１mmである。
【００３９】
前記凸曲部５３ｂの外面には接触面積低減部としての凹状をなすディンプル５８が長手方向へ向けジグザグ状をなして所定間隔毎に複数個形成されている。図６（ａ）はジグザグ状に形成されたディンプル５８のうち背金５３の背側寄りに形成されたディンプル５８を示し、図６（ｂ）は刃先側寄りに形成されたディンプル５８を示している。前記ディンプル５８は曲率半径が８．３５mmに設定されており、その深さＦは０．０５mmに設定されている。又、ディンプル５８の直径Ｈは０．８mmに設定されている。
【００４０】
なお、前記ディンプル５８の曲率半径は７．８５mm〜８．８５mmの範囲において設定可能であるが、より望ましい範囲は８．０５mm〜８．６５mmであり、最も好適な範囲は８．２５mm〜８．４５mmである。又、前記ディンプル５８の深さＦは０．０２mm〜０．０６mmの範囲において設定可能であるが、より望ましい範囲は０．０３５mm〜０．０５５mmであり、最も好適な範囲は０．０４５mm〜０．０５mmである。さらに、前記ディンプル５８の直径Ｈは０．７mm〜０．９mmの範囲において設定可能であるが、より望ましい範囲は０．７５mm〜０．８５mmであり、最も好適な範囲は０．７８mm〜０．８２mmである。
【００４１】
又、図５（ａ），（ｂ）に示すように、背金５３に対する刃先５４の突出長さＤは０．６mmに設定されている。そして、図３に示すように、固定挟着部７の刃体挟着部１１と可動挟着板６の刃体挟着部３１との協働により挟着された替刃３において、刃体５２の刃先５４から可動挟着板外側面６ａに接する接線Ｌ１と、刃体５２の中心線Ｍとのなす角度α１は約１９．５度に設定されている。
【００４２】
加えて、前記刃先５４から固定挟着部外側面７ａに接する接線Ｌ２と、刃体５２の中心線Ｍとのなす角度α２は約１９．５度に設定されている。さらに、刃先５４と背金５３の両凸曲部５３ｂの外側面との接する線をＳ１，Ｓ２とすると、接線Ｓ１と中心線Ｍとのなす角度β１は２５度に設定されている。又、接線Ｓ２と中心線Ｍとのなす角度β２は２５度に設定されている。
【００４３】
なお、前記刃先５４の突出長さＤは、０．４mm〜０．８mmの範囲において設定可能であるが、より望ましい範囲は０．５mm〜０．７mmであり、最も好適な範囲は０．５８mm〜０．６２mmである。又、角度α１，α２は、１７度〜２８度の範囲において設定可能であるが、より望ましい範囲は１８度〜２３度であり、最も好適な範囲は１８．２度〜２２度である。角度β１，β２は２２度〜３２度の範囲において設定可能であるが、より望ましい範囲は２３．５度〜３０度であり、最も好適な範囲は２４．５度〜２５．５度である。
【００４４】
すなわち、替刃式剃刀１を先端側から見ると、可動挟着板６及び固定挟着部７の湾曲形成された側面同士は、前記中心線Ｍを中心に略左右対象形状に形成されている。
【００４５】
なお、本実施形態では刃体５２と皮膚表面Ｈｉとのなす角度を約１９．５度にした際に、刃体５２の刃先５４が毛Ｋｅを剃る最も好適な角度となるように設定している。
【００４６】
次に、本実施形態のように構成された替刃式剃刀１の作用の説明を替刃式剃刀１の作用の説明とともにする。
図３に示すように、可動挟着板外側面６ａ、凸曲部５３ｂ及び刃先５４を皮膚表面Ｈｉに対して接触させると、替刃式剃刀１の中心線Ｍと皮膚表面Ｈｉとのなす角度はα１度となる。すると、凸曲部５３ｂと刃先５４が皮膚表面Ｈｉに接触することで、刃体５２の皮膚表面Ｈｉに対する角度が安定する。この結果、刃先５４にかかるホルダ２の荷重及びホルダ２を移動させる際の運行荷重は、可動挟着板外側面６ａ及び凸曲部５３ｂに分散され、刃先５４にて毛Ｋｅを剃っても肌荒れを起こさない。
【００４７】
又、この時、凸曲部５３ｂは皮膚表面Ｈｉを押圧し、その押圧した皮膚表面Ｈｉに対し張りを生じさせる。すると、刃先５４前方の毛Ｋｅが立ち上がり、その状態で替刃式剃刀１を前方へ移動させると、刃先５４にて毛Ｋｅを根元から剃る。
【００４８】
又、凸曲部５３ｂには複数のディンプル５８が設けられている。このため、上記のように凸曲部５３ｂを皮膚表面Ｈｉに押圧させたまま替刃式剃刀１を前方へ移動させる際に、凸曲部５３ｂが皮膚表面Ｈｉに対する接触面積が小さくなり、この結果、皮膚表面Ｈｉに対する凸曲部５３ｂの滑りがよくなる。
【００４９】
加えて、ホルダ２の可動挟着部外側面を曲率半径４０mmにしたことで、その側面を皮膚表面Ｈｉに接触させたまま毛剃りを行える。
従って、本実施形態のホルダ２及び替刃３によれば、以下のような効果を得ることができる。
【００５０】
（１）本実施形態では、可動挟着板外側面６ａ、凸曲部５３ｂ及び刃先５４を皮膚表面Ｈｉに対して接触させると、替刃式剃刀１の中心線Ｍと皮膚表面Ｈｉとのなす角度はα１度となる。従って、可動挟着板外側面６ａを皮膚表面Ｈｉに当てることで角度α１を安定させることができ、理想的な対皮角度で毛剃りを行うことができる。又、剃り心地を良くし、剃り残し、肌荒れのない顔剃りをすることができる。
【００５１】
（２）本実施形態では、替刃３に皮膚表面Ｈｉを押圧する凸曲部５３ｂを設けている。従って、刃先５４前方の皮膚表面Ｈｉに生えた毛Ｋｅを剃る際に、凸曲部５３ｂにて皮膚表面Ｈｉを押圧することで毛Ｋｅが立ち上がり根元から剃ることができる。
【００５２】
又、替刃３の刃先５４から延び可動挟着板外側面６ａ，固定挟着部外側面７ａ（ホルダ２の外側面）に接する接線Ｌ１，Ｌ２と刃体５２（替刃）の中心線Ｍとのなす角度α１，α２は、刃先５４から背金５３の両凸曲部５３ｂ（皮膚押圧部）の外側面に接する接線Ｓ１，Ｓ２と前記中心線とのなす角度β１，β２よりも小さくなるように、ホルダ２の可動挟着板外側面６ａ，固定挟着部外側面７ａを形成した。
【００５３】
この結果、上記皮膚表面Ｈｉを押圧する凸曲部５３ｂの押圧作用を減ずることがない。すなわち、仮に、α１，α２がβ１，β２よりも大きくなるように、ホルダ２の可動挟着板外側面６ａ，固定挟着部外側面７ａを形成した場合には、皮膚表面Ｈｉを押圧する凸曲部５３ｂの押圧作用を減ずることになって、毛Ｋｅの立ち上がりが良好でなくなってしまい、好適に根元から剃ることができなくなるが、本実施形態ではこのようなことはない。
【００５４】
（３）本実施形態では、凸曲部５３ｂにディンプル５８を設けている。従って、凸曲部５３ｂが皮膚表面Ｈｉに対する接触面積が小さくなり、皮膚表面Ｈｉに対する凸曲部５３ｂの滑りをよくすることができる。
【００５５】
（４）本実施形態では、背金５３の刃先と背部のなす中間部は刃体５２の両側面に対して背側端部近傍より隣接した凹曲部５３ａとなっている。そして、替刃３の凹曲部５３ａを刃体挟着部１１の突出部１１ａ及び刃体挟着部３１の突出部３１ａに挟着し、替刃３の背側端部近傍を刃体挟着部１１の凹部１１ｂ及び刃体挟着部３１の凹部３１ｂに係止した。従って、背金５３の凹曲部５３ａをホルダ２の刃体挟着部１１，３１に安定して挟着することができる。
【００５６】
（５）本実施形態では、刃体５２の両側に凸曲部５３ｂを設けている。従って、替刃式剃刀１使用時の操作性を向上できる。
（第２実施形態）
次に、第２実施形態を図７に従って説明する。なお、第２実施形態は、前記第１実施形態を変更したものであり、前記第１実施形態と同様の構成については、同一符号を付して、その詳細な説明を省略し、異なるところのみを説明する。
【００５７】
本実施形態のホルダ２は前記第１実施形態の刃体挟着部１１，３１の形状を変更し、本実施形態の替刃３は前記第１実施形態の背金５３の形状を変更したものである。
【００５８】
本実施形態の刃体挟着部６１は、固定挟着部７における上下方向中央近傍から下側縁部にかけて平面状に形成されおり、その挟着側端部（下部）には、基端側から先端側に延び、かつ湾曲状の窪み部６１ａが形成されている。一方、刃体挟着部７１は、可動挟着板６における上下方向中央近傍から下側縁部にかけて平面状に形成されおり、その挟着側端部（下部）には基端側から先端側に延び、かつ湾曲状の窪み部７１ａが形成されている。前記窪み部６１ａ，７１ａは後述する背金８０における凸曲部８０ａの背側端部を覆うように形成されている。
【００５９】
前記ホルダ２の刃体挟着部６１，７１には、保持部材としての背金８０を有する替刃３が挟着されている。替刃３の背金８０は、前記刃体５２の背部５２ａから略中間部に亘って、刃体５２の両側面に当接しており、その外側両側面が平面状に形成され、前記刃体５２の略中間部から刃先側端部近傍に亘って、膨出湾曲した凸曲部８０ａが形成されている。前記凸曲部８０ａは皮膚押圧部及び凸部に相当する。前記凸曲部８０ａの外面には、前記第１実施形態のディンプル５８と同様の図示しないディンプルが形成されている。
【００６０】
そして、図７に示すように、固定挟着部７の刃体挟着部６１と可動挟着板６の刃体挟着部７１との協働により挟着された替刃３において、刃体５２の刃先５４から可動挟着板外側面６ａに接する接線Ｌ３と、刃体５２の中心線Ｍとのなす角度は、前記角度α１に設定されている。加えて、前記刃先５４から固定挟着部外側面７ａに接する接線Ｌ４と、刃体５２の中心線Ｍとのなす角度は、前記角度α２に設定されている。
【００６１】
さらに、刃先５４と背金８０の両凸曲部８０ａの外側面との接する線をＳ３，Ｓ４とすると、接線Ｓ３と中心線Ｍとのなす角度、及び接線Ｓ４と中心線Ｍとのなす角度は、ぞれぞれ前記角度β１，角度β２に設定されている。
【００６２】
このように構成しても、前記第１実施形態と同様の作用を奏するとともに、以下の効果を奏する。
図７に示すように、ホルダ２の刃体挟着部６１，７１に替刃３を挟着すると、刃体挟着部６１，７１の窪み部６１ａ，７１ａが替刃３の凸曲部８０ａの背側端部を覆う。即ち、刃体挟着部６１，７１の窪み部６１ａ，７１ａにて、ホルダ２と替刃３との密着感が高められる。
【００６３】
従って、前記第１実施形態の（１）〜（３），（５）と同様の効果を奏するとともに、以下の効果を奏する。
（１）本実施形態では、刃体挟着部６１，７１の窪み部６１ａ，７１ａにて、ホルダ２と替刃３との密着感を高めることができる。
（他の実施形態）
なお、上記各実施形態は以下のような他の実施形態に変更して具体化してもよい。
【００６４】
・前記第１実施形態では、替刃３の凸曲部５３ｂに凹状をなすディンプル５８を設け、同ディンプル５８にて皮膚表面Ｈｉに対する凸曲部５３ｂの接触面積を小さくしていた。しかし、皮膚表面Ｈｉに対する凸曲部５３ｂの接触面積を小さくするために、凸曲部５３ｂに１以上の接触面積低減部としての突部を設けてもよい。又、このような変更を第２実施形態において、具体化してもよい。
【００６５】
・前記第１実施形態では、替刃３の凸曲部５３ｂにディンプル５８を設けていたが、省略してもよい。又、このような変更を第２実施形態において、具体化してもよい。
【００６６】
・前記第１実施形態では背金５３に皮膚押圧部である凸曲部５３ｂを設けていた。背金５３の凸曲部５３ｂを省略して、その代わりに刃体５２自体に凸曲部５３ｂと同様の外形形状を持つ突起を設け、その突起を皮膚押圧部としてもよい。又、このような変更を第２実施形態において、具体化してもよい。
【００６７】
・前記第１実施形態では刃体５２を背金５３にて保持していたが、刃先５４以外の刃体５２部分を樹脂などで覆ってもよい。この場合、樹脂部分の外形形状は前記背金５３の外形形状と同様にする。又、このような変更を第２実施形態において、具体化してもよい。
【００６８】
・前記第１実施形態では、中心線Ｍに対して両側に凸曲部５３ｂを有するように背金５３を形成していたが、どちらか一方のみに形成するようにしてもよい。この場合、ホルダ２は、刃体挟着部１１の突出部１１ａ、凹部１１ｂを省略するか、或いは刃体挟着部３１の突出部３１ａ、凹部３１ｂを省略してもよい。又、このような変更を第２実施形態において、具体化してもよい。
【００６９】
・前記第１実施形態では、背金５３の凸曲部５３ｂに、ディンプル５８を長手方向へ向けジグザグ状に所定間隔毎に複数個形成していた。これに限らず、ディンプル５８を背金５３の凸曲部５３ｂにランダムに配列してもよい。又、このような変更を第２実施形態において、具体化してもよい。
【００７０】
・前記第１実施形態では、刃体挟着部１１，３１の突出部１１ａ，３１ａ及び凹部１１ｂ，３１ｂを湾曲状に形成していたが、湾曲状に形成しなくともよい。例えば、段状をなすよに突出部１１ａ，３１ａ及び凹部１１ｂ，３１ｂを形成してもよい。
【００７１】
・前記第２実施形態では、窪み部６１ａ，７１ａを湾曲状に形成していたが、湾曲状に形成しなくともよい。例えば、段状をなすように窪み部６１ａ，７１ａを形成してもよい。
【００７２】
次に、上記実施形態及び他の実施形態から把握できる請求項に記載した発明以外の技術的思想について記載する。
（イ）前記皮膚押圧部は刃体の両側に設けたことを特徴とする請求項１乃至請求項４のうちいずれか１項に記載の替刃式剃刀の替刃。このようにすると、両側面に皮膚押圧部を設けたことで、使用時の操作性を向上できる。
【００７３】
【発明の効果】
請求項１〜３に記載の発明によれば、替刃式剃刀の替刃が皮膚表面に対する角度が安定し、剃り心地と剃り味を良くすることができる。又、皮膚押圧部を皮膚表面に押圧した状態で毛を剃ると根元から剃ることができる。
【００７４】
請求項１に記載の発明によれば、保持部材の昼間部を替刃式剃刀の挟着部分とすることで替刃式剃刀の替刃を替刃式剃刀に安定して取り付けることができる。
請求項２に記載の発明によれば、替刃式剃刀の替刃の皮膚表面に対する滑りをよくすることができる。
【００７５】
請求項３に記載の発明によれば、刃体の刃先及び刃体の中心線を通過する仮想平面と皮膚表面とのなす角度を、前記刃体の刃先及び刃体の中心線を通過する仮想平面と刃先及び前記皮膚押圧部に接する平面とがなす角度より小さくすることで皮膚押圧部を皮膚表面に押圧できる。
【００７６】
請求項４〜６に記載の発明によれば、替刃の皮膚に対する角度を安定することができ、剃り心地を良くし、剃り残し、肌荒れのない顔剃りをすることができる。
【００７７】
請求項５に記載の発明によれば、刃体挟着部の突出部にて、側方に替刃凹部を有する替刃式剃刀の替刃を安定して挟着できる。
請求項６に記載の発明によれば、替刃式剃刀のホルダの窪み部にて、替刃式剃刀のホルダと、側方に凸部を有する替刃式剃刀の替刃との密着感を高めることができる。
【図面の簡単な説明】
【図１】第１実施形態における替刃式剃刀を示す斜視図。
【図２】同じく可動挟着板及び固定挟着部材の構成を示す斜視図。
【図３】同じく替刃式剃刀を先端側から見た要部拡大図。
【図４】同じく替刃を示す正面図。
【図５】（ａ）は、図４のＡ−Ａ線矢視断面図。（ｂ）は、図４のＢ−Ｂ線矢視断面図。
【図６】（ａ）は、背金の刃先側を示す拡大断面図。（ｂ）は、背金の刃先側を示す拡大断面図。
【図７】第２実施形態における替刃式剃刀の刃先周辺部の要部拡大図。
【符号の説明】
２…替刃式剃刀のホルダとしてのホルダ、
３…替刃式剃刀の替刃及び背金付替刃としての替刃、
１１，３１，６１，７１…刃体挟着部、１１ａ，３１ａ…突出部、
１１ｂ，３１ｂ…凹部、５２…刃体、５３，８０…保持部材としての背金、
５３ａ…保持部材の中間部及び替刃凹部としての凹曲部、
５３ｂ…皮膚押圧部としての凸曲部、５４…刃先、
５８…接触面積低減部としてのディンプル、
８０ａ…皮膚押圧部及び凸部としての凸曲部、Ｈｉ…皮膚表面。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a replaceable blade of a replaceable blade razor and a holder of a replaceable blade razor used for facial shaving or the like in a barber shop.
[0002]
[Prior art]
This type of replaceable blade razor replaceable blade (hereinafter referred to as a replaceable blade) is sandwiched between holders that can be sandwiched to form a replaceable blade razor. Then, when performing face shave with such a replaceable blade razor, the blade tip is brought into contact with the skin surface with the blade body of the replaceable blade standing at a predetermined angle with respect to the skin surface, and the replaceable blade is placed on the skin surface. Is moving along.
[0003]
[Problems to be solved by the invention]
By the way, when a face is shaved with a replaceable blade type razor, the shaving is left untouched, and not only rough skin but also good shaving comfort is required. In general, for safety reasons, the angle of the skin, the holder, and the replacement blade with respect to the skin surface (the skin angle) is increased (the holder is raised), so there is a risk of leaving unshaved, rough skin, and blood blowing. It is recommended to shave with a small size. However, since the holder weight and operating load are concentrated on one point of the blade edge, rough skin and blood blowing cannot be completely prevented.
[0004]
The present invention provides a replaceable blade of a replaceable blade razor that can stabilize the angle of the replaceable blade of the replaceable blade razor with respect to the skin, improve the shaving comfort, leave the shave, and shave the face without rough skin. There is to do.
[0005]
Another object of the present invention is to sandwich a replaceable blade of a replaceable blade type razor that can stabilize the angle of the replaceable blade with respect to the skin, improve the shaving comfort, leave it unshaved, and shave the face without rough skin. It is to provide a replaceable blade type razor holder to be worn.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, in the replaceable blade of the replaceable blade type razor, the blade body is held by the holding member, and the cutting edge of the blade body from one end of the holding member. The edge of the holding member holds the blade, the vicinity of the edge of the holding member is separated from both side surfaces of the blade, and the intermediate portion of the holding member is The edge of the blade edge side of the blade body in the holding member is closer to both side surfaces than the edge of the blade edge side, and the vicinity of the back side edge of the holding member is separated from the intermediate portion with respect to both side surfaces of the blade body. The gist is that the vicinity of the portion is configured as a skin pressing portion that bulges toward the opposite blade side.
[0007]
According to a second aspect of the present invention, in the replaceable blade of the replaceable blade type razor, the blade body is held by the holding member, the blade edge of the blade body protrudes from one end of the holding member, and the holding member One or more contact area reduction parts for reducing the contact area with the skin surface are comprised in the skin press part which the edge part edge part vicinity of the blade body bulged toward the anti-blade body side is comprised. The gist is that is provided.
[0008]
A third aspect of the present invention is the method according to the first or second aspect, wherein a virtual plane passing through the blade edge and the blade center line of the blade body and a plane contacting the blade edge and the outer surface of the skin pressing portion are formed. The gist is that the angle is in the range of 22 degrees to 32 degrees.
[0009]
Invention of Claim 4 is a holder of the replaceable blade type razor which can clamp the replacement blade of the replaceable blade type razor of any one of the said Claims 1 thru | or 3, Comprising: Has a blade body clamping part for clamping a replacement blade of a replacement blade type razor, and in a state where the replacement blade is attached to the holder, a tangent extending from the tip of the replacement blade and contacting the outer surface of the holder The gist is that the outer surface of the holder is formed so that the angle formed with the center line is smaller than the angle formed between the tangent line that contacts the outer surface of the skin pressing portion from the cutting edge of the replacement blade and the center line. .
[0010]
The invention according to claim 5 is the holder of the replaceable blade type razor according to claim 4, further comprising a projecting portion projecting toward the replaceable blade side in the vicinity of the sandwiching side end portion of the blade body sandwiching portion, The gist is to sandwich a replaceable blade recess provided on a side of the replaceable blade of the replaceable blade razor at the protruding portion.
[0011]
The invention according to claim 6 is the holder of the replaceable blade type razor according to claim 4, wherein the blade body sandwiching portion includes a hollow portion at a sandwiching side end portion, and the hollow portion includes the replacement portion. The gist is to cover a part of the convex portion provided on the side of the blade of the blade type razor.
[0013]
(Function)
Therefore, in invention of Claim 1, when shaving the hair of a skin surface, a skin press part and the blade edge | tip of a blade body are made to contact a skin surface. Then, since both the skin pressing part and the blade edge of the blade body are in contact with the skin surface, the angle formed by the virtual plane passing through the blade edge and the center line of the blade body and the skin surface is stable and comfortable to shave. And the shaving taste is improved.
[0014]
Further, when the skin pressing part is pressed against the skin surface, the skin of the part pressed by the skin pressing part is pulled, and as a result, the hair located in front of the cutting edge of the blade body rises. Then, when the blade body is moved forward with the skin pressing portion kept in contact with the skin surface, the raised hair is shaved from the base at the blade edge of the blade body.
[0015]
Furthermore, when the skin pressing portion provided on the holding member and the blade edge of the blade body are brought into contact with the skin surface, the angle formed between the virtual plane passing through the blade edge of the blade body and the center line of the blade body and the skin surface is stabilized. Moreover, the hair located in front of the blade edge | tip of a blade body rises by pressing the skin press part provided in the holding member against the skin surface.
[0016]
In addition, when attaching the replaceable blade of the replaceable blade type razor to the replaceable blade type razor, the intermediate portion of the holding member is sandwiched between the blade body sandwiching portions of the replaceable blade type razor.
[0017]
In the invention described in claim 2, the skin pressing portion is provided with a contact area reducing portion. As a result, when the blade body is moved forward with the skin pressing part kept in contact with the skin surface, the skin pressing part has a contact area with the skin surface that does not have a contact area reducing part. To reduce slippage and improve sliding.
[0018]
In the invention described in claim 3, in addition to the action described in claim 1 or claim 2, the angle formed between the imaginary plane passing through the blade edge of the blade body and the center line of the blade body and the skin surface is When the angle is smaller than the angle formed by the virtual plane passing through the blade edge and the center line of the blade body and the plane in contact with the blade edge and the skin pressing portion, the skin pressing portion presses the skin surface.
[0019]
In the invention of Claim 4, the replacement blade of a replaceable blade type razor is clamped in the blade body clamping part of the holder of a replaceable blade type razor. Then, the angle formed between the tangent line extending from the blade edge of the replaceable blade and contacting the outer surface of the holder and the centerline of the replaceable blade is greater than the angle formed by the tangent line contacting the outer surface of the skin pressing portion from the blade edge of the replaceable blade and the centerline. Becomes smaller.
[0020]
As a result, when the outer surface of the holder of the replaceable blade razor and the cutting edge of the replaceable blade are brought into contact with the skin surface, the skin pressing portion presses the skin surface. Then, the skin of the part pressed by the skin pressing part will be in the state pulled, and the hair located in front of the blade edge | tip of a replaceable blade will stand up. Then, when the blade body is moved forward with the skin pressing portion kept in contact with the skin surface, the raised hair is shaved from the base at the blade edge of the blade body. Moreover, the angle with respect to the skin of the blade edge | tip of a replaceable blade is stabilized by making the outer surface of the holder of a replaceable blade type razor contact the skin surface.
[0021]
In addition to the effect | action of Claim 4, in the invention of Claim 5, the replaceable blade recessed part of the replaceable blade of a replaceable blade type razor is clamped in the protrusion part of a blade body clamping part.
In the invention described in claim 6, in addition to the operation described in claim 4, when the holder of the replaceable blade razor clamps the replaceable blade of the replaceable blade razor at the blade body clamping portion, The hollow part of a blade clamping part covers a part of convex part of the replacement blade of a replaceable blade type razor.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a replaceable blade type razor. The replaceable blade type razor 1 includes a holder 2 and a replaceable blade 3 sandwiched between the holder 2. The holder 2 corresponds to a holder for a replaceable blade razor, and the replaceable blade 3 corresponds to a replaceable blade for a replaceable blade razor. The holder 2 includes a handle portion 4, a fixed clamping member 5, and a movable clamping plate 6. A fixed clamping part 7 is formed at the tip of the fixed clamping member 5. A movable clamping plate 6 is provided at a position facing the fixed clamping part 7, and the replaceable blade 3 is clamped by the cooperation of both 6 and 7.
[0023]
As shown in FIG. 2, the fixed clamping part 7 includes a blade body clamping part 11 on which the replaceable blade 3 (not shown in FIG. 2) is positioned and a movable clamping plate 6 described later. Supporting cylinders 12 and 13 on which shafts 32 and 33 are rotatably supported, a spring mounting portion 14, and a leaf spring 15 mounted on the spring mounting portion 14 are provided. As shown in FIGS. 2 and 3, the blade clamping part 11 is formed from the vicinity of the center in the vertical direction of the fixed clamping part 7 to the lower edge, and in the vicinity of the clamping side end (lower part), A protruding portion 11a that extends from the proximal end side to the distal end side and protrudes in a curved shape is formed. And the protrusion part 11a is formed in the clamping side edge vicinity of the blade body clamping part 11, and the curved recessed part 11b is formed in the back side edge part (upper part) of the blade body clamping part 11. FIG. .
[0024]
At the uppermost part of the blade body sandwiching part 11, a locking ridge part 16 for limiting the movement of the replaceable blade 3 in the vertical direction is formed. Note that the movement of the replaceable blade 3 in the proximal direction (left side in FIG. 2) of the fixed clamping part 7 is limited by a wall-like part 17 that locks the movable clamping plate 6.
[0025]
Further, a guide groove 18 having a semicircular cross section extending from the proximal end side to the distal end side of the fixed sandwiching portion 7 is formed on the upper surface of the locking protrusion 16, and the support shaft 32 of the movable sandwiching plate 6 is formed. , 33 reach the support cylinders 12, 13 while being guided by the guide groove 18. The support cylinders 12 and 13 are formed by a cylindrical body whose opening is directed toward the proximal end side at the distal end side and the proximal end side of the guide groove 18 having a semicircular cross section. 12 is formed shorter than the support tube 13 on the base end side in order to lock the locked portion 41 of the support shaft 32.
[0026]
The spring mounting portion 14 is recessed near the upper edge of the fixed clamping portion 7, and a plate spring 15 is mounted on the spring mounting portion 14 by a spring mounting protrusion 19 and a locking washer 21 so as to be freely movable.
[0027]
The movable clamping plate 6 is inserted into the support cylinders 12 and 13 and the blade clamping part 31 that clamps the replacement blade 3 in cooperation with the blade clamping part 11 of the fixed clamping part 7. Support shafts 32 and 33 and a pressed portion 34 pressed by the leaf spring 15 are provided.
[0028]
The blade clamping part 31 is formed from the vicinity of the vertical center of the movable clamping plate 6 to the lower edge, and in the vicinity of the clamping side end (lower part), a curved shape extending from the proximal side to the distal side. The protruding portion 31a is formed. And the protrusion part 31a is formed in the clamping side edge vicinity of the blade body clamping part 31, and the recessed part 31b which curved the back side edge part (upper part) of the blade body clamping part 31 is formed. .
[0029]
A locking ridge 35 is formed on the uppermost portion of the blade clamping portion 31 so as to face the locking ridge 16. A guide groove 36 having a semicircular cross section extending from the proximal end side to the distal end side of the movable clamping plate 6 is formed on the upper surface of the locking protrusion 35, and the guide groove 36, the support cylinders 12, 13, The support shafts 32 and 33 are guided to the support cylinders 12 and 13 by being slid in the engaged state.
[0030]
The support shafts 32 and 33 include shaft portions 37 and 38 that are inserted into the support cylinders 12 and 13, and fixed portions 39 and 40 that fix the shaft portions 37 and 38 to the movable clamping plate 6. On the distal end side and the proximal end side of the guide groove 36, the shaft portions 37 and 38 are disposed so as to face the proximal end side. A locked portion 41 is formed around the shaft portion 37 of the support shaft 32 positioned on the distal end side so as to be reliably locked to the support tube 12 on the distal end side. The locked portion 41 is formed in the vicinity of the tip of the shaft portion 37 of the support shaft 32 so as to have a larger cross-sectional diameter than that of the shaft portion 37.
[0031]
The shaft portions 37 and 38 are inserted into the support cylinders 12 and 13, and the locked portion 41 is moved by the elastic force of the leaf spring 15 as the shafts of both the shafts 12 and 37 are shifted in the radial direction of the shaft. Locked to the support cylinder 12. In the fixed clamping portion outer side surface 7a which is the side surface opposite to the movable clamping plate 7 of the fixed clamping portion 7 and the movable clamping plate outer side surface 6a which is the side surface opposite to the fixed clamping portion 6 of the movable clamping plate 6, A curved surface bulging outward is formed from the vicinity of the back end portion to the sandwiching end portion, and the radius of curvature is set to 40 mm. The radius of curvature can be set in a range of 30 mm to 50 mm, but a more preferable range is 35 mm to 45 mm, and a most preferable range is 39 mm to 41 mm.
[0032]
Then, with the shaft portions 37 and 38 inserted into the support cylinders 12 and 13 as fulcrums, by the elastic force of the leaf spring 15, the vicinity of the upper edge portion of the movable sandwiching plate 6 and the upper edge portion of the fixed sandwiching portion 7. The space between the neighborhood is expanded. As a result, a concavely curved portion 53a (described later) of the replaceable blade 3 is sandwiched between the projecting portion 11a of the blade body sandwiching portion 11 and the projecting portion 31a of the blade body sandwiching portion 31. In addition, the vicinity of a back side end portion (described later) of the replaceable blade 3 is engaged with a recess 11 b of the blade body sandwiching portion 11 and a recess 31 b of the blade body sandwiching portion 31.
[0033]
Next, the replaceable blade 3 will be described.
As shown in FIGS. 4, 5 (a) and 5 (b), the replaceable blade 3 is configured by a blade body 52 and a back metal 53 as a holding member that holds the blade body 52.
[0034]
The blade body 52 is made of a stainless steel plate having a rectangular shape as a whole, and the lower end portion of the blade body 52 is a blade edge 54 in FIGS. Two long holes 55a and 55b are formed in the longitudinal direction of the blade body 52 at a predetermined interval in a portion covered with the back metal 53 of the blade body 52. Long holes 56a and 56b having the same shape as the long holes 55a and 55b are formed on both sides of the back metal 53 corresponding to the positions where the long holes 55a and 55b are formed.
[0035]
The thickness of the back metal 53 is set to 3 mm. As a result, the strength of the blade body 52 is greatly improved, and chatter (vibration) of the blade edge 54 that occurs during shaving can be reduced. The thickness of the back metal 53 can be arbitrarily changed according to the thickness of the blade body 52. As shown in FIGS. 5 (a) and 5 (b), on one side of the back metal 53, locking pieces 57a and 57b project from the back opening edge portions of the long holes 56a and 56b toward the blade edge side, respectively. ing.
[0036]
The locking pieces 57a and 57b are bent from the outside of the back metal 53 toward the blade body 52 and are in contact with the upper inner edges of the long holes 55a and 55b. When the locking pieces 57a and 57b are brought into contact with and locked to the upper inner edge portions of the long holes 55a and 55b, the blade body 52 moves upward, and the back portion 52a of the blade body 52 is brought into contact with the upper portion of the back metal 53. ing. Therefore, the vertical movement of the blade edge 54 is restricted.
[0037]
The back metal 53 is formed to be curved so as to have a U-shaped cross section at a position corresponding to the back portion 52a of the blade body 52, and the back portion 52a of the blade body 52 is in contact therewith. An intermediate portion between the blade edge side end portion and the back portion of the back metal 53 is formed with a concave curved portion 53a that is located inward and close to both side surfaces of the blade body 52 than the vicinity of the back side end portion. The concave curved portion 53a corresponds to an intermediate portion of the holding member and a replaceable blade concave portion. Further, the vicinity of the blade edge side end portion (clamping side end portion) of the back metal 53 is swelled as a skin pressing portion that is located outward from the concave curved portion 53a with respect to both side surfaces of the blade body 52 and spaced apart. A protruding curved portion 53b is formed. The blade edge side end portion of the back metal 53 sandwiches the blade body 52.
[0038]
The radius of curvature of the concave curved portion 53a is set to 8 mm, and the radius of curvature of the convex curved portion 53b is set to 2 mm. The radius of curvature of the concave curved portion 53a can be set in a range of 7 mm to 10 mm, but a more preferable range is 7.5 mm to 9 mm, and a most preferable range is 7.8 mm to 8.2 mm. Further, the radius of curvature of the convex curved portion 53b can be set in a range of 1.5 mm to 5 mm, but a more preferable range is 2 mm to 3 mm, and a most preferable range is 1.9 mm to 2.1 mm.
[0039]
On the outer surface of the convex curved portion 53b, a plurality of dimples 58 having a concave shape as a contact area reducing portion are formed in a zigzag shape in the longitudinal direction at predetermined intervals. 6A shows a dimple 58 formed on the back side of the back metal 53 among the dimples 58 formed in a zigzag shape, and FIG. 6B shows a dimple 58 formed on the side of the blade edge. Yes. The dimple 58 has a radius of curvature of 8.35 mm and a depth F of 0.05 mm. The diameter H of the dimple 58 is set to 0.8 mm.
[0040]
The radius of curvature of the dimple 58 can be set in the range of 7.85 mm to 8.85 mm. A more desirable range is 8.05 mm to 8.65 mm, and the most preferable range is 8.25 mm to 8.85 mm. 45 mm. The depth F of the dimple 58 can be set in the range of 0.02 mm to 0.06 mm, but a more desirable range is 0.035 mm to 0.055 mm, and the most preferable range is 0.045 mm to 0. .05mm. Further, the diameter H of the dimple 58 can be set in a range of 0.7 mm to 0.9 mm, but a more desirable range is 0.75 mm to 0.85 mm, and a most preferable range is 0.78 mm to 0.00. 82 mm.
[0041]
Further, as shown in FIGS. 5A and 5B, the protruding length D of the blade edge 54 with respect to the back metal 53 is set to 0.6 mm. Then, as shown in FIG. 3, in the replaceable blade 3 sandwiched by the cooperation of the blade body sandwiching portion 11 of the fixed sandwiching portion 7 and the blade body sandwiching portion 31 of the movable sandwiching plate 6, the blade body An angle α1 formed between a tangent line L1 in contact with the movable sandwiching plate outer surface 6a from the blade edge 54 of 52 and the center line M of the blade body 52 is set to about 19.5 degrees.
[0042]
In addition, an angle α2 formed between a tangent line L2 in contact with the fixed sandwiching portion outer surface 7a from the blade edge 54 and the center line M of the blade body 52 is set to about 19.5 degrees. Furthermore, if the lines where the blade edge 54 and the outer side surfaces of both convex portions 53b of the back metal 53 are in contact are S1 and S2, the angle β1 formed by the tangent line S1 and the center line M is set to 25 degrees. The angle β2 formed between the tangent line S2 and the center line M is set to 25 degrees.
[0043]
The protrusion length D of the blade edge 54 can be set in the range of 0.4 mm to 0.8 mm, but a more desirable range is 0.5 mm to 0.7 mm, and the most preferable range is 0.58 mm. ~ 0.62 mm. Further, the angles α1 and α2 can be set in a range of 17 degrees to 28 degrees, but a more desirable range is 18 degrees to 23 degrees, and a most preferable range is 18.2 degrees to 22 degrees. The angles β1 and β2 can be set in a range of 22 degrees to 32 degrees, but a more desirable range is 23.5 degrees to 30 degrees, and a most preferable range is 24.5 degrees to 25.5 degrees.
[0044]
That is, when the replaceable blade type razor 1 is viewed from the front end side, the curved side surfaces of the movable sandwiching plate 6 and the fixed sandwiching portion 7 are formed in a substantially right and left target shape with the center line M as a center. .
[0045]
In the present embodiment, when the angle between the blade body 52 and the skin surface Hi is about 19.5 degrees, the blade edge 54 of the blade body 52 is set so as to be the most suitable angle for shaving the hair Ke. Yes.
[0046]
Next, the operation of the replaceable blade razor 1 configured as in the present embodiment will be described together with the operation of the replaceable blade razor 1.
As shown in FIG. 3, when the movable sandwiching plate outer surface 6a, the convex curved portion 53b and the blade edge 54 are brought into contact with the skin surface Hi, the angle formed by the center line M of the replaceable blade razor 1 and the skin surface Hi. Becomes α1 degree. Then, the angle with respect to the skin surface Hi of the blade body 52 is stabilized because the convex curve part 53b and the blade edge | tip 54 contact the skin surface Hi. As a result, the load of the holder 2 applied to the blade edge 54 and the operation load when moving the holder 2 are distributed to the movable sandwiching plate outer surface 6a and the convex curved portion 53b, and even if the hair Ke is shaved by the blade edge 54, the skin becomes rough. Does not cause.
[0047]
At this time, the convex curved portion 53b presses the skin surface Hi, and causes tension on the pressed skin surface Hi. Then, the hair Ke in front of the blade edge 54 rises, and when the replaceable blade razor 1 is moved forward in this state, the hair Ke is shaved from the root by the blade edge 54.
[0048]
In addition, a plurality of dimples 58 are provided on the convex curved portion 53b. For this reason, when the replaceable blade razor 1 is moved forward with the convex portion 53b pressed against the skin surface Hi as described above, the contact area of the convex portion 53b with the skin surface Hi becomes small. The sliding of the convex curved part 53b with respect to the skin surface Hi is improved.
[0049]
In addition, since the outer surface of the movable clamping portion of the holder 2 has a curvature radius of 40 mm, shaving can be performed while the side surface is in contact with the skin surface Hi.
Therefore, according to the holder 2 and the replaceable blade 3 of the present embodiment, the following effects can be obtained.
[0050]
(1) In this embodiment, when the movable clamping plate outer surface 6a, the convex curved portion 53b, and the blade edge 54 are brought into contact with the skin surface Hi, the center line M of the replaceable blade razor 1 and the skin surface Hi are formed. The angle is α1 degree. Therefore, the angle α1 can be stabilized by applying the movable sandwiching plate outer surface 6a to the skin surface Hi, and shaving can be performed at an ideal skin angle. In addition, the shaving feeling can be improved, the shaving can be left, and the face can be shaved without rough skin.
[0051]
(2) In the present embodiment, the replaceable blade 3 is provided with a convex curved portion 53b that presses the skin surface Hi. Therefore, when the hair Ke grown on the skin surface Hi in front of the blade edge 54 is shaved, the hair Ke rises and can be shaved from the root by pressing the skin surface Hi with the convex portion 53b.
[0052]
Further, the movable clamping plate outer surface 6a, the fixed clamping unit outer surface 7a (the outer surface of the holder 2) and the tangent lines L1, L2 extending from the cutting edge 54 of the replacement blade 3 and the center line M of the blade body 52 (replacement blade). Are smaller than the angles β1 and β2 formed by the tangent lines S1 and S2 that contact the outer surface of the convex portion 53b (skin pressing portion) of the back metal 53 from the blade edge 54 and the center line. Thus, the movable clamping plate outer surface 6a and the fixed clamping part outer surface 7a of the holder 2 were formed.
[0053]
As a result, the pressing action of the convex portion 53b that presses the skin surface Hi is not reduced. That is, if the movable sandwiching plate outer surface 6a and the fixed sandwiching portion outer surface 7a of the holder 2 are formed so that α1 and α2 are larger than β1 and β2, the convexity that presses the skin surface Hi is formed. The pressing action of the curved portion 53b is reduced, and the rising of the hair Ke becomes unsatisfactory, and it becomes impossible to shave from the root appropriately. However, in this embodiment, this is not the case.
[0054]
(3) In this embodiment, the dimple 58 is provided in the convex curved part 53b. Accordingly, the convex curved portion 53b has a small contact area with the skin surface Hi, and the convex curved portion 53b can be more easily slipped with respect to the skin surface Hi.
[0055]
(4) In the present embodiment, the intermediate portion formed by the blade tip and the back portion of the back metal 53 is a concave curved portion 53 a that is adjacent to both side surfaces of the blade body 52 from the vicinity of the back end portion. And the concave curved part 53a of the replaceable blade 3 is clamped by the protrusion part 11a of the blade body clamping part 11, and the protrusion part 31a of the blade body clamp part 31, and the back side edge part vicinity of the replaceable blade 3 is clamped by a blade body. The concave portion 11b of the wearing portion 11 and the concave portion 31b of the blade body sandwiching portion 31 were locked. Therefore, the concave curved portion 53 a of the back metal 53 can be stably clamped to the blade body clamping portions 11 and 31 of the holder 2.
[0056]
(5) In the present embodiment, convex curved portions 53 b are provided on both sides of the blade body 52. Therefore, the operability when using the replaceable blade razor 1 can be improved.
(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. The second embodiment is a modification of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and only different portions are described. Will be explained.
[0057]
The holder 2 of this embodiment changes the shape of the blade clamping parts 11 and 31 of the first embodiment, and the replaceable blade 3 of this embodiment changes the shape of the back metal 53 of the first embodiment. It is.
[0058]
The blade clamping part 61 of the present embodiment is formed in a planar shape from the vicinity of the center in the vertical direction to the lower edge part in the fixed clamping part 7, and the clamping side end (lower part) has a proximal end side. A curved recess 61a extending from the tip to the tip side is formed. On the other hand, the blade body sandwiching portion 71 is formed in a planar shape from the vicinity of the center in the vertical direction to the lower edge portion of the movable sandwiching plate 6, and the sandwiching side end portion (lower portion) has a proximal end side to a distal end side. And a curved recess 71a is formed. The recessed portions 61a and 71a are formed so as to cover the back side end portion of the convex curved portion 80a in the back metal 80 described later.
[0059]
A replaceable blade 3 having a back metal 80 as a holding member is sandwiched between the blade body sandwiching portions 61 and 71 of the holder 2. The back metal 80 of the replaceable blade 3 is in contact with both side surfaces of the blade body 52 from the back portion 52a to the substantially intermediate portion of the blade body 52, and both outer side surfaces thereof are formed in a flat shape. A convexly curved portion 80a that bulges and curves is formed from the substantially middle portion of 52 to the vicinity of the end portion on the blade edge side. The convex curved portion 80a corresponds to a skin pressing portion and a convex portion. Dimples (not shown) similar to the dimples 58 of the first embodiment are formed on the outer surface of the convex curved portion 80a.
[0060]
Then, as shown in FIG. 7, in the replaceable blade 3 sandwiched by the cooperation of the blade body sandwiching portion 61 of the fixed sandwiching portion 7 and the blade body sandwiching portion 71 of the movable sandwiching plate 6, the blade body An angle formed between a tangent line L3 in contact with the movable sandwiching plate outer surface 6a from the blade edge 54 of 52 and the center line M of the blade body 52 is set to the angle α1. In addition, an angle formed between a tangent line L4 contacting the fixed sandwiching portion outer surface 7a from the blade edge 54 and the center line M of the blade body 52 is set to the angle α2.
[0061]
Further, assuming that the lines that contact the cutting edge 54 and the outer surfaces of both convex portions 80a of the back metal 80 are S3 and S4, the angle formed by the tangent line S3 and the center line M, and the angle formed by the tangent line S4 and the center line M. Are set to the angles β1 and β2, respectively.
[0062]
Even if comprised in this way, while exhibiting the effect | action similar to the said 1st Embodiment, there exist the following effects.
As shown in FIG. 7, when the replaceable blade 3 is sandwiched between the blade body sandwiching portions 61 and 71 of the holder 2, the recessed portions 61 a and 71 a of the blade body sandwiching portions 61 and 71 are convex portions 80 a of the replaceable blade 3. Cover the dorsal end. That is, the close contact feeling between the holder 2 and the replacement blade 3 is enhanced at the recessed portions 61 a and 71 a of the blade body sandwiching portions 61 and 71.
[0063]
Accordingly, the same effects as (1) to (3) and (5) of the first embodiment are exhibited, and the following effects are also achieved.
(1) In this embodiment, the feeling of close contact between the holder 2 and the replaceable blade 3 can be enhanced at the recessed portions 61 a and 71 a of the blade body sandwiching portions 61 and 71.
(Other embodiments)
Each of the above embodiments may be embodied by changing to the following other embodiments.
[0064]
-In the said 1st Embodiment, the dimple 58 which makes concave shape was provided in the convex part 53b of the replaceable blade 3, and the contact area of the convex part 53b with respect to the skin surface Hi was made small in the dimple 58. However, in order to reduce the contact area of the convex portion 53b with respect to the skin surface Hi, the convex portion 53b may be provided with one or more protrusions as a contact area reducing portion. Such a change may be embodied in the second embodiment.
[0065]
-In the said 1st Embodiment, although the dimple 58 was provided in the convex part 53b of the replaceable blade 3, you may abbreviate | omit. Such a change may be embodied in the second embodiment.
[0066]
-In the said 1st Embodiment, the convex curve part 53b which is a skin press part was provided in the back metal 53. FIG. Instead of the convex bent portion 53b of the back metal 53, a protrusion having the same outer shape as the convex bent portion 53b may be provided on the blade body 52 itself, and the protrusion may be used as the skin pressing portion. Such a change may be embodied in the second embodiment.
[0067]
In the first embodiment, the blade body 52 is held by the back metal 53, but the blade body 52 other than the blade edge 54 may be covered with resin or the like. In this case, the outer shape of the resin portion is the same as the outer shape of the back metal 53. Such a change may be embodied in the second embodiment.
[0068]
In the first embodiment, the back metal 53 is formed so as to have the convex curved portions 53b on both sides with respect to the center line M. However, the back metal 53 may be formed on only one of them. In this case, the holder 2 may omit the projecting portions 11a and the recessed portions 11b of the blade body sandwiching portion 11, or may omit the projecting portions 31a and the recessed portions 31b of the blade body sandwiching portion 31. Such a change may be embodied in the second embodiment.
[0069]
In the first embodiment, a plurality of dimples 58 are formed in the zigzag shape at predetermined intervals on the convex portion 53b of the back metal 53 in the longitudinal direction. However, the present invention is not limited to this, and the dimples 58 may be randomly arranged on the convex curved portion 53 b of the back metal 53. Such a change may be embodied in the second embodiment.
[0070]
In the first embodiment, the projecting portions 11a and 31a and the recessed portions 11b and 31b of the blade body sandwiching portions 11 and 31 are formed in a curved shape, but may not be formed in a curved shape. For example, you may form protrusion part 11a, 31a and recessed part 11b, 31b so that a step shape may be made.
[0071]
In the second embodiment, the depressions 61a and 71a are formed in a curved shape, but may not be formed in a curved shape. For example, the depressions 61a and 71a may be formed so as to form a step shape.
[0072]
Next, technical ideas other than the invention described in the claims that can be grasped from the above embodiment and other embodiments will be described.
(A) The replacement blade of the replaceable blade type razor according to any one of claims 1 to 4, wherein the skin pressing portion is provided on both sides of the blade body. If it does in this way, the operativity at the time of use can be improved by providing the skin press part on both sides | surfaces.
[0073]
【The invention's effect】
According to invention of Claims 1-3, the angle with respect to the skin surface of the replaceable blade of a replaceable blade type razor is stabilized, and it can improve a shaving feeling and a shaving taste. In addition, if the hair is shaved with the skin pressing part pressed against the skin surface, it can be shaved from the root.
[0074]
According to invention of Claim 1, the replacement blade of a replaceable blade type razor can be stably attached to a replaceable blade type razor by making the daytime part of a holding member into the clamping part of a replaceable blade type razor.
According to invention of Claim 2, the sliding with respect to the skin surface of the replaceable blade of a replaceable blade type razor can be improved.
[0075]
According to invention of Claim 3, the angle which the virtual plane which passes along the blade tip of a blade body and the centerline of a blade body, and the skin surface makes the virtual which passes the blade blade of the said blade body, and the centerline of a blade body. The skin pressing part can be pressed against the skin surface by making it smaller than the angle formed by the flat surface and the blade tip and the flat surface in contact with the skin pressing part.
[0076]
According to invention of Claims 4-6, the angle with respect to the skin of a replaceable blade can be stabilized, shaving comfort can be improved, shaving is left, and the face can be shaved without rough skin.
[0077]
According to invention of Claim 5, the replacement blade of the replaceable blade type razor which has a replaceable blade recessed part on the side can be stably clamped in the protrusion part of a blade body clamping part.
According to invention of Claim 6, in the hollow part of the holder of a replaceable blade type razor, the contact feeling of the holder of a replaceable blade type razor and the replaceable blade of the replaceable blade type razor which has a convex part on a side is provided. Can be increased.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a replaceable blade razor according to a first embodiment.
FIG. 2 is a perspective view showing the configuration of a movable clamping plate and a fixed clamping member.
FIG. 3 is an enlarged view of a main part of the replaceable blade type razor as viewed from the tip side.
FIG. 4 is a front view showing the replacement blade.
5A is a cross-sectional view taken along line AA in FIG. 4; (B) is the BB arrow sectional drawing of FIG.
FIG. 6A is an enlarged cross-sectional view showing a blade edge side of a back metal. (B) is an expanded sectional view which shows the blade edge | tip side of a back metal.
FIG. 7 is an enlarged view of a main part of a peripheral portion of a blade edge of a replaceable blade razor according to a second embodiment.
[Explanation of symbols]
2 ... Holder as a replaceable blade razor holder,
3 ... Replacement blade as a replacement blade for replacement blade type razor and replacement blade with back metal,
11, 31, 61, 71 ... blade body clamping part, 11a, 31a ... projecting part,
11b, 31b ... concave portion, 52 ... blade body, 53, 80 ... back metal as a holding member,
53a: an intermediate portion of the holding member and a concave curved portion as a spare blade concave portion,
53b ... Convex part as skin pressing part, 54 ... Cutting edge,
58... Dimple as a contact area reducing part,
80a ... Skin pressing part and convex curved part as convex part, Hi ... skin surface.

Claims

In the replacement blade of a replaceable blade type razor,
The blade body is held by the holding member, and the blade edge of the blade body protrudes from one end of the holding member,
The blade edge side end of the holding member clamps the blade body, the blade edge side vicinity of the holding member is separated from both side surfaces of the blade body, and the intermediate portion of the holding member is opposed to both side surfaces of the blade body. Near the blade edge side end portion, the back side end portion of the holding member is spaced from the intermediate portion with respect to both side surfaces of the blade body,
The replaceable blade of the replaceable blade type razor, wherein the vicinity of the edge side end portion of the blade body in the holding member is configured as a skin pressing portion bulging toward the opposite blade body side.

In the replacement blade of a replaceable blade type razor,
The blade body is held by the holding member, and the blade edge of the blade body protrudes from one end of the holding member,
The cutting edge side end vicinity of the blade body in the holding member is configured as a skin pressing part that bulges toward the opposite blade body side,
The replaceable blade of a replaceable blade type razor, wherein the skin pressing portion is provided with one or more contact area reducing portions for reducing the contact area with the skin surface.

The angle formed by a virtual plane passing through the blade edge and the blade center line of the blade body and a plane in contact with the blade edge and the outer surface of the skin pressing portion is in a range of 22 degrees to 32 degrees. A replaceable blade of the replaceable blade type razor according to claim 1 or claim 2.

A holder for a replaceable blade razor capable of sandwiching the replaceable blade of the replaceable blade razor according to any one of claims 1 to 3,
The holder is equipped with a blade clamping unit for clamping a replacement blade of a replacement blade razor,
With the replacement blade attached to the holder, the angle formed between the tangent line extending from the blade edge of the replacement blade and in contact with the outer surface of the holder and the center line of the blade is in contact with the outer surface of the skin pressing portion from the blade edge of the replacement blade. A holder for a replaceable blade razor, wherein the outer surface of the holder is formed so as to be smaller than an angle formed between a tangent and the center line.

In the vicinity of the clamping side end of the blade body clamping part, there is provided a projecting part projecting toward the replaceable blade side, and the replaceable blade provided on the side of the replaceable blade of the replaceable blade type razor at the projecting part. The holder of the replaceable blade razor according to claim 4, wherein a concave portion is sandwiched.

The sandwiching end portion of the blade body sandwiching portion includes a recess, and the recess covers a part of a convex portion provided on the side of the replaceable blade of the replaceable blade razor. The holder of the replaceable blade type razor according to claim 4.