JP4172446B2 - Electric razor - Google Patents

Electric razor Download PDF

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JP4172446B2
JP4172446B2 JP2004302232A JP2004302232A JP4172446B2 JP 4172446 B2 JP4172446 B2 JP 4172446B2 JP 2004302232 A JP2004302232 A JP 2004302232A JP 2004302232 A JP2004302232 A JP 2004302232A JP 4172446 B2 JP4172446 B2 JP 4172446B2
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blade
longitudinal direction
inner blade
outer blade
base
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JP2006110197A (en
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武志 柴
重左エ門 岩崎
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Description

本発明は、外刃と内刃とを具備する電気かみそりに関するものである。   The present invention relates to an electric razor including an outer blade and an inner blade.

従来から、ネット状の外刃と、外刃の内面に接触する内刃と、外刃に対して内刃を摺動させる駆動機構とを具備して成る電気かみそりが知られている。上記内刃は内刃基台に複数の内刃ブレードを取付けたものであり、内刃ブレードの刃先を外刃の内面に押圧させた状態で内刃基台を駆動することで、外刃の刃孔から導入した髭等の体毛を内刃ブレードにより切断するようになっている。上記電気かみそりの外刃としては、その外面を短手方向に沿って外方に凸となるように湾曲形成し、且つ長手方向に沿っては一直線状に形成した構成のものが一般的であるが、このような電気かみそりを用いた場合には、例えば顎下等の窪み部分に対して外刃をフィットさせづらくなり、また接触面積も小さくなるので髭等を効率的に処理することが困難であるという問題があった。   2. Description of the Related Art Conventionally, an electric razor comprising a net-shaped outer blade, an inner blade that contacts an inner surface of the outer blade, and a drive mechanism that slides the inner blade with respect to the outer blade is known. The inner blade has a plurality of inner blades attached to the inner blade base, and the inner blade base is driven while the blade edge of the inner blade is pressed against the inner surface of the outer blade. Body hair such as wrinkles introduced from the blade hole is cut by an inner blade. As the outer blade of the electric razor, one having a configuration in which the outer surface is curved so as to protrude outward along the short side direction and is formed in a straight line along the longitudinal direction is common. However, when such an electric razor is used, for example, it becomes difficult to fit the outer blade to a recessed portion such as under the jaw, and the contact area is also small, so it is difficult to efficiently treat wrinkles and the like. There was a problem of being.

そこで、図１０に示すように、ネット状の外刃５０をその短手方向だけでなく長手方向に沿っても外方に凸となるように湾曲形成した構成の電気かみそりが提案されている（特許文献１参照）。この構成の電気かみそりにあっては、顎下等の窪み部分に対しても外刃５０をフィットさせ易く、また接触面積も大きくなるという利点があり、髭等を効率的に処理することが可能となる。しかし、上記電気かみそりにあっては、図示のように内刃５１に取付けられる内刃ブレード５２が外刃５０の短手方向にその刃先を伸ばすものであり、また駆動機構はこの内刃ブレード５２を長手方向に列設してある内刃基台５３を長手方向に往復動させる構造であることから、内刃基台５３上に立設する各内刃ブレード５２の刃先の高さを外刃５０の長手方向の湾曲と厳密に一致させておく必要があり、したがって加工コストが高く安価に提供することが困難であるという問題があった。
特開昭４９−１３３１５１号公報 Therefore, as shown in FIG. 10, an electric shaver having a configuration in which a net-shaped outer blade 50 is curved so as to protrude outward not only in the short direction but also in the longitudinal direction has been proposed ( Patent Document 1). The electric razor having this configuration has advantages that it is easy to fit the outer blade 50 to a recessed portion such as under the jaw, and the contact area is increased, so that wrinkles and the like can be processed efficiently. It becomes. However, in the electric razor, the inner blade 52 attached to the inner blade 51 extends in the short direction of the outer blade 50 as shown in the figure, and the drive mechanism is the inner blade 52. Since the inner blade bases 53 arranged in the longitudinal direction are reciprocated in the longitudinal direction, the height of the cutting edge of each inner blade blade 52 standing on the inner blade base 53 is set to the outer blade. Therefore, there is a problem that it is difficult to provide a low cost because the processing cost is high.
JP-A-49-133151

本発明は上記問題点に鑑みて発明したものであって、ネット状の外刃が長手方向に沿って外方に凸となるように湾曲形成された電気かみそりを、簡単な構造により安価で提供することを課題とするものである。   The present invention has been invented in view of the above problems, and provides an electric razor that is curved so that a net-shaped outer blade protrudes outward in the longitudinal direction with a simple structure at low cost. It is an object to do.

上記課題を解決するために本発明を、長手方向Ｙに沿って外方に凸となるように湾曲形成されたネット状の外刃４と、外刃４の内面に接触する内刃２０と、外刃４に対して内刃２０を摺動させる駆動機構とを具備する電気かみそりであって、上記内刃２０が、外刃４の長手方向Ｙに伸びるように刃先２４を形成して成る内刃ブレード２２を内刃基台２１に支持させたものであり、且つ、上記駆動機構が、外刃４の長手方向Ｙに伸びる回転中心軸Ａを中心に上記内刃２０を回転駆動させるものであり、上記内刃２０の回転中心軸Ａが、外刃４側に向けて凸となるように湾曲させたものであることを、特徴としたものとする。上記構成の電気かみそりにあっては、長手方向Ｙに沿って凸状に湾曲形成させた外刃４が顎下等の窪み部分にフィットし易く、髭等を効率的に処理することが可能であることに加えて、内刃２０を製造するにあたって、内刃ブレード２２の長手方向Ｙに伸びる刃先２４を外刃４と同様の曲率半径となるように湾曲形成するだけで良いので、内刃ブレード２２の内刃基台２１への取付作業を従来のように厳密に行う必要なく、内刃ブレード２２の刃先２４を外刃４内面に良好に密着させることが可能となる。したがって、内刃２０の加工コストを抑制して安価に提供することが可能なものである。また、回転中心軸Ａの上記湾曲を外刃４の長手方向Ｙの湾曲と一致させたことで、外刃４をその短手方向Ｘの曲率が均一なものとすることができる。 In order to solve the above problems, the present invention includes a net-shaped outer blade 4 that is curved so as to protrude outward along the longitudinal direction Y, an inner blade 20 that contacts the inner surface of the outer blade 4, and An electric razor having a drive mechanism for sliding the inner blade 20 with respect to the outer blade 4, wherein the inner blade 20 is formed by forming a cutting edge 24 so as to extend in the longitudinal direction Y of the outer blade 4. The blade blade 22 is supported on the inner blade base 21, and the drive mechanism rotates the inner blade 20 about the rotation center axis A extending in the longitudinal direction Y of the outer blade 4. Ah is, the rotation axis a of the inner blade 20, that is obtained by bending so as to project toward the outer cutter 4 side, and those wherein. In the electric razor having the above-described configuration, the outer blade 4 that is curvedly formed along the longitudinal direction Y can easily fit into a recessed portion such as a chin, and can efficiently process wrinkles and the like. In addition, when manufacturing the inner blade 20, it is only necessary to form the cutting edge 24 extending in the longitudinal direction Y of the inner blade blade 22 so as to have a curvature radius similar to that of the outer blade 4. It is possible to attach the cutting edge 24 of the inner blade blade 22 to the inner surface of the outer blade 4 satisfactorily without having to perform the work of attaching the inner blade 22 to the inner blade base 21 strictly as in the prior art. Therefore, the processing cost of the inner blade 20 can be suppressed and provided at a low cost. Further, by matching the curvature of the rotation center axis A with the curvature of the outer cutter 4 in the longitudinal direction Y, the curvature of the outer cutter 4 in the lateral direction X can be made uniform.

上記内刃２０の内刃ブレード２２は、弾性体から成る内刃基台２１に、外刃４の長手方向Ｙに沿って複数連設されるものであってもよく、このように内刃ブレード２２を長手方向Ｙに分割させたような構成とすることで、各内刃ブレード２２の刃先２４が外刃４内面に更に良好に密着することとなる。   A plurality of the inner blades 22 of the inner blade 20 may be connected to the inner blade base 21 made of an elastic body along the longitudinal direction Y of the outer blade 4. By adopting a configuration in which 22 is divided in the longitudinal direction Y, the cutting edge 24 of each inner blade 22 is more closely attached to the inner surface of the outer blade 4.

本発明は、ネット状の外刃が長手方向に沿って外方に凸となるように湾曲形成された電気かみそりを、簡単な構造により安価で提供することができるという効果を奏するものである。   The present invention has an effect that it is possible to provide an electric razor that is curved so that a net-shaped outer blade protrudes outward in the longitudinal direction with a simple structure at low cost.

以下、本発明を添付図面に示す実施形態に基いて説明する。図４には、本発明の実施の形態における一例の電気かみそりの外観を示している。後述の制御回路１や駆動部２を内蔵する本体部３は把手部をも兼ねるものであり、該本体部３の先端には、ネット状の外刃４を保持する刃フレーム５を備えたシェーバヘッド６を着脱自在に装着させている。本体部３の構造は図３に示すようなものであり、外殻を成す本体ハウジング７の側面には操作スイッチ８をスライド自在に突出させている。本体ハウジング７内の制御回路１には、上記操作スイッチ８や、本体ハウジング７の底面側から露出させた外部電源接続端子９や、駆動部２を構成する駆動モータ１０をリード線１１により接続させており、また、充電池１２を充電可能に接続させて設けている。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. FIG. 4 shows an appearance of an example of an electric shaver in the embodiment of the present invention. A main body 3 incorporating a control circuit 1 and a drive unit 2 to be described later also serves as a handle, and a shaver provided with a blade frame 5 for holding a net-like outer blade 4 at the tip of the main body 3. The head 6 is detachably attached. The structure of the main body 3 is as shown in FIG. 3, and an operation switch 8 is slidably projected on the side surface of the main body housing 7 forming the outer shell. The control circuit 1 in the main body housing 7 is connected to the operation switch 8, the external power connection terminal 9 exposed from the bottom surface side of the main body housing 7, and the drive motor 10 constituting the drive unit 2 by lead wires 11. Moreover, the rechargeable battery 12 is connected to be rechargeable.

本体ハウジング７内の駆動部２は、駆動モータ１０と、駆動モータ１０のモータ軸１３に固定してあるギア１４と、本体ハウジング７内に設けてある回転軸１５を中心に回転自在であり且つその歯面が前記ギア１４と噛合うように配される伝達ギア１６とで構成され、本体ハウジング７のシェーバヘッド６との連結側である先端面から伝達ギア１６の一部を突出させてその歯面を露出させている。また図中の符号１７は、本体ハウジング７の先端面の両端部分から突設されて先端に凸状の係止体を有するフック部である。   The drive unit 2 in the main body housing 7 is rotatable around a drive motor 10, a gear 14 fixed to the motor shaft 13 of the drive motor 10, and a rotation shaft 15 provided in the main body housing 7. The transmission gear 16 is arranged so that its tooth surface meshes with the gear 14, and a part of the transmission gear 16 protrudes from the distal end surface of the main body housing 7 that is connected to the shaver head 6. The tooth surface is exposed. Reference numeral 17 in the drawing denotes a hook portion that protrudes from both end portions of the front end surface of the main body housing 7 and has a convex locking body at the front end.

シェーバヘッド６の構造は図１や図４に示すようなものであり、平面視略矩形状の枠体である刃フレーム５の、略矩形状に開口する先端開口部に外刃４を取付け、この外刃４の内面と接触するように、刃フレーム５内に内刃２０を回転自在に配した構造である。外刃４は、多数の刃孔を有する薄板状の部材であって、該外刃４の短手方向（以下、これを短手方向Ｘとする）に沿って外側に凸となり、且つ該外刃４の長手方向（以下、これを長手方向Ｙとする）に沿っても外側に凸となり、更にその短手方向Ｘの曲率半径が長手方向Ｙにおける中央部分から端側に近付くほどに漸次小さくなるように湾曲形成したものであり、上記の所謂太鼓状に形成された外刃４はその強度を高く保持することとなる。   The structure of the shaver head 6 is as shown in FIGS. 1 and 4, and the outer blade 4 is attached to the tip opening portion of the blade frame 5 that is a substantially rectangular frame body in plan view, and is opened in a substantially rectangular shape. The inner blade 20 is rotatably arranged in the blade frame 5 so as to be in contact with the inner surface of the outer blade 4. The outer blade 4 is a thin plate-like member having a number of blade holes, and protrudes outward along the short direction of the outer blade 4 (hereinafter referred to as the short direction X). Along the longitudinal direction of the blade 4 (hereinafter referred to as the longitudinal direction Y), the projection 4 protrudes outward, and the radius of curvature in the lateral direction X gradually decreases from the central portion to the end side in the longitudinal direction Y. The outer blade 4 formed so as to be curved and formed in the so-called drum shape keeps its strength high.

内刃２０は、長手方向Ｙに一直線状に伸びる回転中心軸Ａを中心として刃フレーム５に回転自在に支持される支持軸部１８に接続固定される円筒状の内刃基台２１と、この内刃基台２１の外側周面上の周方向に一定間隔を隔てた各個所に支持される複数の内刃ブレード２２とで主体を成している。内刃基台２１は、長手方向Ｙに一直線状に貫通する貫通穴２３内に支持軸部１８が嵌入固定されるものであり、支持軸部１８と一体に回転中心軸Ａを中心として駆動されるようになっている。また内刃ブレード２２は、内刃基台２１と同様に長手方向Ｙをその長手方向とする薄板状の部材であり、その外方を向く端縁部分に、長手方向Ｙに伸びる刃先２４を形成している。また、内刃ブレード２２の長手方向Ｙの両端部分には、刃先２４の尖端方向とは逆方向に向けて取付部２５を延設してあり、各取付部２５には、刃先２４の尖端方向に長尺の長穴１９をそれぞれ形成している（図２参照）。上記長穴１９は、内刃基台２１の外側周面の長手方向Ｙ両端部分に凹設される取付凹部２６の側壁から突設される取付軸２７が嵌入されるものであり、上記長穴１９と取付軸２７とが刃先２４の尖端方向にスライド自在に嵌合することで、内刃ブレード２２は上記尖端方向（換言すると内刃基台２１の径方向）に向けてスライド自在に取付けられている。取付軸２７の先端は該取付軸２７が長穴１９から抜けないようにかしめてあり、したがって内刃ブレード２２の内刃基台２１からの脱落は防止されている。   The inner blade 20 includes a cylindrical inner blade base 21 connected and fixed to a support shaft portion 18 that is rotatably supported by the blade frame 5 around a rotation center axis A that extends in a straight line in the longitudinal direction Y. The main body is composed of a plurality of inner blades 22 supported at various positions on the outer peripheral surface of the inner blade base 21 at regular intervals in the circumferential direction. The inner blade base 21 has a support shaft portion 18 fitted and fixed in a through hole 23 that penetrates in a straight line in the longitudinal direction Y, and is driven around the rotation center axis A integrally with the support shaft portion 18. It has become so. The inner blade 22 is a thin plate-like member having the longitudinal direction Y as the longitudinal direction in the same manner as the inner blade base 21, and a cutting edge 24 extending in the longitudinal direction Y is formed at the edge portion facing outward. is doing. Further, at both end portions of the inner blade 22 in the longitudinal direction Y, attachment portions 25 are extended in a direction opposite to the tip direction of the blade edge 24, and each attachment portion 25 has a tip direction of the blade edge 24. A long slot 19 is formed in each (see FIG. 2). The long hole 19 is configured to receive a mounting shaft 27 projecting from a side wall of a mounting recess 26 that is recessed at both ends in the longitudinal direction Y of the outer peripheral surface of the inner blade base 21. 19 and the mounting shaft 27 are slidably fitted in the tip direction of the blade edge 24, so that the inner blade blade 22 is slidably mounted in the tip direction (in other words, the radial direction of the inner blade base 21). ing. The tip of the mounting shaft 27 is crimped so that the mounting shaft 27 does not come out of the long hole 19, so that the inner blade blade 22 is prevented from falling off from the inner blade base 21.

各内刃ブレード２２の内方を向く（即ち刃先２４を形成してある側と逆側の）端縁部分と、内刃基台２１の外側周面との間には、内刃基台２１の径方向に圧縮された状態の付勢ばね２８を配しており、上記付勢ばね２８を、内刃ブレード２２にその刃先２４の尖鋭方向に向けての付勢力を与える付勢手段として機能させている。上記付勢力により内刃ブレード２２は外刃４の内面に押圧されるが、各内刃ブレード２２はその刃面２４を長手方向Ｙに沿って外方に凸となるように湾曲形成したものであり、しかも外刃４と内刃ブレード２２の刃先２４とでその曲率半径を一致させているので、外刃４と内刃ブレード２２とは長手方向Ｙのいずれの個所においても良好な密着状態で接触するものである。また、支持軸部１８には該支持軸１８と一体に回転するようにギア２９が固定されており、更に刃フレーム５内にはこのギア２９と噛合うように伝達ギア３０が回転自在に支持されている。   The inner blade base 21 is located between the end portion of each inner blade blade 22 facing inward (that is, the side opposite to the side where the cutting edge 24 is formed) and the outer peripheral surface of the inner blade base 21. The urging spring 28 in a compressed state in the radial direction is provided, and the urging spring 28 functions as an urging means for applying an urging force to the inner blade 22 in the sharp direction of the blade edge 24. I am letting. The inner blades 22 are pressed against the inner surface of the outer blade 4 by the urging force, and each inner blade 22 is formed by bending the blade surface 24 so as to protrude outward along the longitudinal direction Y. In addition, since the curvature radii of the outer cutter 4 and the cutting edge 24 of the inner cutter blade 22 are matched, the outer cutter 4 and the inner cutter blade 22 are in good contact with each other in the longitudinal direction Y. It is what comes into contact. A gear 29 is fixed to the support shaft portion 18 so as to rotate integrally with the support shaft 18, and a transmission gear 30 is rotatably supported in the blade frame 5 so as to mesh with the gear 29. Has been.

上記構成のシェーバヘッド６を本体部３の先端側に被せると、本体部３から突設したフック部１７の先端に形成してある係止体が、シェーバヘッド６の刃フレーム５の長手方向Ｙ両端の内側面に凹設した被係止部３１に嵌合して係止され、これによりシェーバヘッド６が本体部３に着脱自在に装着される。そして、上記装着状態において、本体ハウジング７の先端面から一部突出した伝達ギア１６の歯面と、刃フレーム５内に設けてある伝達ギア３０の歯面とが噛合うことで、本体部３内の駆動部２から両伝達ギア２９，３０を介して内刃２０にまで駆動力を伝達して該内刃２０を回転中心軸Ａを中心に回転駆動させる駆動機構が形成されるものである。   When the shaver head 6 having the above configuration is placed on the distal end side of the main body 3, the locking body formed at the distal end of the hook 17 projecting from the main body 3 is in the longitudinal direction Y of the blade frame 5 of the shaver head 6. The shaver head 6 is detachably attached to the main body portion 3 by being fitted and locked to the locked portions 31 provided in the inner side surfaces of both ends. In the mounted state, the tooth surface of the transmission gear 16 partially protruding from the front end surface of the main body housing 7 meshes with the tooth surface of the transmission gear 30 provided in the blade frame 5, so that the main body portion 3. A driving mechanism is formed in which a driving force is transmitted from the inner driving unit 2 to the inner blade 20 via both transmission gears 29 and 30 to rotationally drive the inner blade 20 about the rotation center axis A. .

しかして、上記の装着状態で操作スイッチ８を操作し、制御回路１により駆動モータ１０を回転駆動させると、本体部３内にてギア１４及び伝達ギア１６を介して駆動力が伝達され、更にシェーバヘッド６内にて伝達ギア３０及びギア２９を介して伝達された駆動力により支持軸部１８が回転中心軸Ａを中心として回転駆動される。このとき内刃２０を構成する内刃基台２１は支持軸部１８と一体に回転駆動され、したがって内刃基台２１に支持される複数の内刃ブレード２２も回転中心軸Ａを中心に回転駆動されることとなる。ここで、上記したように内刃ブレード２２は外刃４と一致する曲率半径で長手方向Ｙに沿って湾曲させた刃先２４を有するものであり、したがって内刃２０は各内刃ブレード２２の刃先２４から回転中心軸Ａまでの距離を、長手方向Ｙにおける中央部分から両端側に近付くほど短くなるように形成したものであるとともに、付勢ばね２８によりこの刃先２４側を外刃４内面に押圧させているので、内刃ブレード２２はその刃先２４を良好な密接状態で外刃４の内面に押圧させながら回転中心軸Ａを中心に回転駆動され、外刃４の刃孔から導入された髭等が該外刃４内面に対して円周方向に摺動する内刃ブレード２２の刃先２４で円滑に切断されるようになっている。   Thus, when the operation switch 8 is operated in the above-mentioned mounting state and the drive motor 10 is rotationally driven by the control circuit 1, the driving force is transmitted through the gear 14 and the transmission gear 16 in the main body 3, and further, The support shaft 18 is rotationally driven about the rotation center axis A by the driving force transmitted through the transmission gear 30 and the gear 29 in the shaver head 6. At this time, the inner blade base 21 constituting the inner blade 20 is rotationally driven integrally with the support shaft portion 18, so that the plurality of inner blade blades 22 supported by the inner blade base 21 also rotate around the rotation center axis A. It will be driven. Here, as described above, the inner blade 22 has the cutting edge 24 that is curved along the longitudinal direction Y with a radius of curvature that coincides with the outer blade 4, and therefore the inner blade 20 has a cutting edge of each inner blade 22. The distance from 24 to the rotation center axis A is formed so as to become shorter as it approaches the both ends from the central portion in the longitudinal direction Y, and the cutting edge 24 side is pressed against the inner surface of the outer blade 4 by the biasing spring 28. Therefore, the inner blade 22 is rotationally driven around the rotation center axis A while pressing the blade edge 24 against the inner surface of the outer blade 4 in a good close state, and is introduced from the blade hole of the outer blade 4. Etc. are cut smoothly at the cutting edge 24 of the inner blade 22 that slides in the circumferential direction with respect to the inner surface of the outer blade 4.

ここで、髭剃り時の使用に際しては、ネット状の外刃４をその短手方向Ｘだけでなく長手方向Ｙに沿っても外方に凸となるように湾曲形成させていることで、顎下等の窪み部分に対しても外刃４がフィットし易くなるとともに接触面積も大きくなっており、したがって髭を効率的に処理することが可能になっている。上記外刃４の長手方向Ｙの湾曲は、その曲率半径を１５０〜３５０ｍｍ程度とすることが肌当りの面で好ましい。   Here, at the time of use in shaving, the net-shaped outer blade 4 is curved so as to protrude outward not only in the short direction X but also in the longitudinal direction Y. The outer blade 4 can be easily fitted to the lower recessed portion and the contact area is increased, so that the scissors can be processed efficiently. The curvature of the outer cutter 4 in the longitudinal direction Y is preferably about 150 to 350 mm in terms of the surface per skin.

加えて、内刃２０の製造に際しては、複数個ある内刃ブレード２２の長手方向Ｙに伸びる刃先２４を外刃４と同様の曲率半径となるように湾曲形成しておけば、内刃ブレード２２の内刃基台２１への取付作業をそれ程厳密に行わずとも、内刃ブレード２２の刃先２４はばね付勢により外刃４内面に良好に密着することとなるので、加工コストを抑制して安価に提供することが可能なものである。   In addition, when manufacturing the inner blade 20, if the cutting edge 24 extending in the longitudinal direction Y of the plurality of inner blades 22 is curved so as to have the same radius of curvature as the outer blade 4, the inner blade 22 Even if the mounting operation to the inner blade base 21 is not carried out so strictly, the cutting edge 24 of the inner blade blade 22 will be in close contact with the inner surface of the outer blade 4 due to the spring bias, so that the processing cost can be reduced. It can be provided at low cost.

なお、本例においては駆動機構として上記各ギア１４，１６，２９，３０から構成されるものを用いているが、これに限定されず駆動軸部１８を回転駆動させる機構であれば他の構造であっても構わない。また、図５（ｂ）に示すように外刃４と内刃２０とを複数対備えたものであってもよく、この場合には駆動軸部１８を複数備えてあり且つ駆動機構が各駆動軸部１８を回転駆動させるものであればよい。   In this example, a drive mechanism comprising the gears 14, 16, 29, 30 is used. However, the present invention is not limited to this, and any other structure can be used as long as the drive shaft portion 18 is rotationally driven. It does not matter. Further, as shown in FIG. 5B, a plurality of pairs of outer blades 4 and inner blades 20 may be provided. In this case, a plurality of drive shaft portions 18 are provided and the drive mechanism is driven by each drive. What is necessary is just to drive the axial part 18 rotationally.

次に、本発明の実施の形態における他例の電気かみそりについて、図６〜図８に基づいて説明する。なお、本例の構成のうち一例と同様の構成については詳しい説明を省略し、一例と相違する構成についてのみ以下に詳述する。本例の外刃４は図６や図８に示すようなものであって、一例と同様に、多数の刃孔を有する薄板状の部材を、その短手方向Ｘに沿って外側に凸となり、且つその長手方向Ｙに沿っても外側に凸となるように湾曲形成したものであるが、短手方向Ｘの曲率半径については、長手方向Ｙのいずれの個所においても同一となるように形成している。   Next, another example of an electric shaver according to an embodiment of the present invention will be described with reference to FIGS. In addition, detailed description is abbreviate | omitted about the structure similar to an example among the structures of this example, and only the structure different from an example is explained in full detail below. The outer blade 4 of this example is as shown in FIG. 6 and FIG. 8, and a thin plate-like member having a large number of blade holes is convex outward along the short direction X as in the example. In addition, it is formed so as to be convex outward along the longitudinal direction Y, but the curvature radius in the lateral direction X is formed to be the same in any part in the longitudinal direction Y. is doing.

また本例の内刃２０は、図６や図７に示すようなものであって、一例と同様に、刃フレーム５内に支持される支持軸部１８と嵌合する円筒状の内刃基台２１と、この内刃基台２１の外側周面上の周方向に一定間隔を隔てた各個所に支持される複数の内刃ブレード２２とで主体を成すものであるが、以下の点で一例と相違している。即ち、本例の内刃２０の内刃基台２１は、例えばゴムやエラストマーである弾性体から形成される円筒状の部材であって、長手方向Ｙに貫通する貫通穴２３内に、長手方向Ｙに伸び且つ外刃４側に向けて凸となるように湾曲した支持軸部１８が嵌入され、この支持軸部１８、即ち長手方向Ｙに伸び且つ外刃４側に向けて凸となるように湾曲した回転中心軸Ａを中心として、弾性変形を伴いながら回転自在となっている。また、内刃基台２１はその長手方向Ｙの端部と、同じく支持軸部１８と回転自在に嵌合するギア部４０とを連結させており、該ギア部４０は伝達ギア３０と噛合わせている。   Moreover, the inner blade 20 of this example is as shown in FIG. 6 and FIG. 7, and similarly to the example, a cylindrical inner blade base that fits with the support shaft portion 18 supported in the blade frame 5. The base 21 and a plurality of inner blades 22 supported at various locations on the outer peripheral surface of the inner blade base 21 at regular intervals in the circumferential direction form a main body. It is different from the example. That is, the inner cutter base 21 of the inner cutter 20 of the present example is a cylindrical member formed of an elastic body such as rubber or elastomer, for example, in the through hole 23 penetrating in the longitudinal direction Y in the longitudinal direction. A support shaft portion 18 that is curved so as to extend toward Y and protrude toward the outer blade 4 side is fitted, and this support shaft portion 18, that is, extends in the longitudinal direction Y and protrudes toward the outer blade 4 side. The rotation center axis A is curved while being elastically deformed. Further, the inner blade base 21 is connected to an end portion in the longitudinal direction Y and a gear portion 40 that is rotatably fitted to the support shaft portion 18, and the gear portion 40 meshes with the transmission gear 30. ing.

本例の内刃ブレード２２は、上記弾性体から成る内刃基台２１の外側周面上の周方向に一定距離を隔てた各箇所において、それぞれ長手方向Ｙに複数個だけ連設されるものである。ここで、各箇所における内刃ブレード２２の配置は、図示例のように他の個所の配置と比べて長手方向Ｙにずらしておくことが好ましい。   The inner blades 22 in this example are connected in series in a plurality in the longitudinal direction Y at each location at a predetermined distance in the circumferential direction on the outer peripheral surface of the inner blade base 21 made of the elastic body. It is. Here, it is preferable that the arrangement of the inner blades 22 at each location is shifted in the longitudinal direction Y as compared to the arrangement at other locations as in the illustrated example.

内刃ブレード２２は一例と略同様の形状であるが長手方向Ｙの長さは１／３程度であり、内刃ブレード２２の長手方向Ｙの両端部分に穴４１を穿設して形成してある接続部４２を、同時成形により内刃基台２１に埋設させることで、各内刃ブレード２２を内刃基台２１に立設させて取付けている。各内刃ブレード２２と内刃基台２１との間には一例と同様の付勢ばね２８を介在させており、この復元力を生じる付勢ばね２８と、弾性体から成り復元力を生じる内刃基台２１とが、内刃ブレード２２の長手方向Ｙに伸びる刃先２４を外刃４０内面に押当てる付勢手段となっている。   The inner blade 22 has substantially the same shape as that of the example, but the length in the longitudinal direction Y is about 1/3. The inner blade 22 is formed by drilling holes 41 at both end portions in the longitudinal direction Y. Each inner blade blade 22 is installed upright on the inner blade base 21 by embedding a certain connecting portion 42 in the inner blade base 21 by simultaneous molding. An urging spring 28 similar to that of the example is interposed between each inner blade 22 and the inner blade base 21. The urging spring 28 that generates this restoring force and an inner body that generates an restoring force includes an elastic body. The blade base 21 serves as an urging means for pressing the blade edge 24 extending in the longitudinal direction Y of the inner blade 22 against the inner surface of the outer blade 40.

上記構成の外刃４と内刃２０を備えた本例のシェーバヘッド６を本体部３の先端部に被せた状態において、本体部３の操作スイッチ８を操作して駆動モータ１０を回転駆動させると、本体部３側の駆動機構を介してシェーバヘッド６内にて伝達ギア３０が回転駆動され、この駆動ギア３０と噛合うギア部４０が内刃基台２１を一体に回転駆動させる。ここで、内刃基台２１は弾性変形を生じながら、上記のように外刃４側に向けて凸となるように湾曲した支持軸部１８即ち該支持軸部１８の回転中心軸Ａを中心として回転駆動され、したがって内刃基台２１に支持される各内刃ブレード２２も回転中心軸Ａを中心に回転駆動されることとなる。   In a state where the shaver head 6 of the present example having the outer blade 4 and the inner blade 20 having the above-described configuration is put on the distal end portion of the main body portion 3, the operation switch 8 of the main body portion 3 is operated to rotate the drive motor 10. Then, the transmission gear 30 is rotationally driven in the shaver head 6 via the drive mechanism on the main body 3 side, and the gear portion 40 meshing with the drive gear 30 rotates the inner blade base 21 integrally. Here, while the inner blade base 21 is elastically deformed, the support shaft portion 18 curved so as to protrude toward the outer blade 4 as described above, that is, the rotation center axis A of the support shaft portion 18 is centered. Accordingly, the inner blades 22 supported on the inner blade base 21 are also driven to rotate about the rotation center axis A.

各内刃ブレード２２は、外刃４と一致する曲率半径で長手方向Ｙに沿って湾曲させた刃先２４を有するものであるから、各内刃ブレード２２はその刃先２４全体が外刃４の内面に良好に密着した状態で回転中心軸Ａを中心に回転駆動され、外刃４の刃孔から導入された髭等が該外刃４の内面に対して円周方向に摺動する各内刃ブレード２２の刃先２４で円滑に切断されるようになっている。   Since each inner blade 22 has a cutting edge 24 that is curved along the longitudinal direction Y with a radius of curvature that coincides with the outer blade 4, each inner blade 22 has its entire cutting edge 24 on the inner surface of the outer blade 4. Each inner blade that is driven to rotate about the rotation center axis A in a state of being in close contact with the inner blade and in which the wrinkles introduced from the blade holes of the outer blade 4 slide in the circumferential direction with respect to the inner surface of the outer blade 4 The cutting edge 24 of the blade 22 is smoothly cut.

上記構成の電気かみそりを用いることで、顎下等の窪み部分に対しても外刃４がフィットし易くなって髭等の効率的な処理が可能になることや、加工コストを抑制して安価に提供することが可能になることは一例と同様であるが、本例においては更に外刃４０の短手方向Ｘの曲率半径が、長手方向Ｙに沿って相違せず均一に保持されているので、使用者にとっても肌に当てて有効に使い易く且つ加工コストも抑制可能な外刃４０となっている。   By using the electric razor having the above-described configuration, the outer blade 4 can be easily fitted to a recessed portion such as the chin, and efficient processing such as wrinkles can be performed, and the processing cost is suppressed and inexpensive. However, in this example, the radius of curvature of the outer cutter 40 in the short direction X is further maintained uniformly along the longitudinal direction Y. Therefore, the outer blade 40 is easy to use effectively on the skin for the user and can reduce the processing cost.

なお、本例の電気かみそりにおいても、駆動機構は内刃基台２１が回転中心軸Ａを中心に回転駆動されるものであれば他の構造であっても構わない。また、外刃４と内刃２０とを複数対備えたものであってもよく、この場合には、駆動軸部１８を複数備えてあり且つ駆動機構が各駆動軸部１８に支持される内刃基台２１を回転駆動させるものであればよい。   In the electric shaver of this example, the drive mechanism may have another structure as long as the inner blade base 21 is driven to rotate about the rotation center axis A. Further, a plurality of pairs of outer blades 4 and inner blades 20 may be provided. In this case, a plurality of drive shaft portions 18 are provided and the drive mechanism is supported by each drive shaft portion 18. What is necessary is just to rotate the blade base 21.

また、図９に示すように、駆動軸部１８をその湾曲凸方向が短手方向Ｘの一方（図示例では白抜き矢印方向）に多少傾斜するように取付けた構造としても構わない。この場合、外刃４は駆動軸部１８と同程度だけ傾斜した形状とし、内刃基台２１の回転駆動に伴って内刃ブレード２２の刃先２４が外刃４内面に摺動するように設ける。上記構造により、外刃４の傾斜した湾曲凸方面の頂面においては顎下等の窪み部分に対してフィットし易くなるような長手方向Ｙの湾曲を得ることができると同時に、外刃４の上端面においては滑らかな湾曲面を得ることが可能となる。   Further, as shown in FIG. 9, the drive shaft portion 18 may be mounted so that the curved convex direction is slightly inclined in one of the lateral directions X (in the illustrated example, the direction of the white arrow). In this case, the outer blade 4 is inclined to the same extent as the drive shaft portion 18, and is provided so that the cutting edge 24 of the inner blade blade 22 slides on the inner surface of the outer blade 4 as the inner blade base 21 rotates. . With the above-described structure, it is possible to obtain a curvature in the longitudinal direction Y that makes it easy to fit to a recessed portion such as a chin on the top surface of the inclined curved convex surface of the outer blade 4, and at the same time, A smooth curved surface can be obtained at the upper end surface.

本発明の実施の形態における一例の電気かみそりのシェーバヘッドを示す断面図である。It is sectional drawing which shows the shaver head of an example electric shaver in embodiment of this invention. 同上の電気かみそりの内刃の構造を示す説明図である。It is explanatory drawing which shows the structure of the inner blade of an electric shaver same as the above. 同上の電気かみそりの本体部を示す断面図である。It is sectional drawing which shows the main-body part of an electric shaver same as the above. 同上の電気かみそり全体を示す斜視図である。It is a perspective view which shows the whole electric razor same as the above. 同上の電気かみそりの平面図であり、（ａ）は外刃が一つ備えてある場合、（ｂ）は外刃が二つ備えてある場合を示している。It is a top view of an electric shaver same as the above, (a) shows the case where one outer blade is provided, and (b) shows the case where two outer blades are provided. 本発明の実施の形態における他例の電気かみそりのシェーバヘッドを示す断面図である。It is sectional drawing which shows the shaver head of the other example of the electric shaver in embodiment of this invention. 同上の電気かみそりの内刃の構造を説明するものであり、（ａ）は内刃全体の斜視図、（ｂ）は内刃に嵌入される駆動軸部の斜視図である。The structure of the inner blade of the electric razor described above will be described. (A) is a perspective view of the entire inner blade, and (b) is a perspective view of a drive shaft portion fitted into the inner blade. 同上の電気かみそり全体を示す斜視図である。It is a perspective view which shows the whole electric razor same as the above. 同上の電気かみそりの駆動軸部を傾斜させた場合を示しており、（ａ）は平面図、（ｂ）は（ａ）のＢ−Ｂ線断面図である。The case where the drive shaft part of the electric razor same as the above is inclined is shown, (a) is a plan view, and (b) is a sectional view taken along line BB of (a). 従来の電気かみそりの主要部を示す説明図である。It is explanatory drawing which shows the principal part of the conventional electric shaver.

符号の説明Explanation of symbols

４ 外刃
２０ 内刃
２１ 内刃基台
２２ 内刃ブレード
２４ 刃先
２８ 付勢ばね
Ａ 回転中心軸
Ｙ 長手方向 4 Outer blade 20 Inner blade 21 Inner blade base 22 Inner blade blade 24 Cutting edge 28 Biasing spring A Rotation center axis Y Longitudinal direction

Claims (2)

長手方向に沿って外方に凸となるように湾曲形成されたネット状の外刃と、外刃の内面に接触する内刃と、外刃に対して内刃を摺動させる駆動機構とを具備する電気かみそりであって、上記内刃が、外刃の長手方向に伸びるように刃先を形成して成る内刃ブレードを内刃基台に支持させたものであり、且つ、上記駆動機構が、外刃の長手方向に伸びる回転中心軸を中心に上記内刃を回転駆動させるものであり、上記内刃の回転中心軸が、外刃側に向けて凸となるように湾曲させたものであることを特徴とする電気かみそり。 A net-shaped outer blade that is curved so as to protrude outward along the longitudinal direction, an inner blade that contacts the inner surface of the outer blade, and a drive mechanism that slides the inner blade relative to the outer blade. An electric razor provided, wherein the inner blade is supported by an inner blade base with an inner blade blade formed with a blade tip extending in the longitudinal direction of the outer blade, and the drive mechanism is which, der which the inner cutter about the rotational axis extending in the longitudinal direction of the outer cutter is rotationally driven is, the rotation center axis of the inner blade, is curved so as to project toward the outer cutter side electric shaver, characterized in that it. 上記内刃の内刃ブレードが、弾性体から成る内刃基台に、外刃の長手方向に沿って複数連設されるものであることを特徴とする請求項１に記載の電気かみそり。2. The electric shaver according to claim 1, wherein a plurality of inner blades of the inner blade are connected to an inner blade base made of an elastic body along the longitudinal direction of the outer blade.
JP2004302232A 2004-10-15 2004-10-15 Electric razor Expired - Fee Related JP4172446B2 (en)

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