JP4037439B2 - Electric razor - Google Patents

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JP4037439B2
JP4037439B2 JP2006233285A JP2006233285A JP4037439B2 JP 4037439 B2 JP4037439 B2 JP 4037439B2 JP 2006233285 A JP2006233285 A JP 2006233285A JP 2006233285 A JP2006233285 A JP 2006233285A JP 4037439 B2 JP4037439 B2 JP 4037439B2
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blade
inner blade
small
blank
slit
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JP2006314835A (en
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康雄 山下
幸太郎 岩倉
伸紀 八尋
敬恒 田中
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Kyushu Hitachi Maxell Ltd
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Kyushu Hitachi Maxell Ltd
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Description

本発明は、左右に長い樋状の内刃を備えている電気かみそりに関する。   The present invention relates to an electric razor provided with a long hook-shaped inner blade on the left and right.

この種の内刃において、電鋳法によってシート状の内刃ブランクを形成したのち、内刃ブランクをプレス成形して樋状の内刃を得ることが、特許文献１に公知である。フォトレジスト法によってシート状の母型ブランクを形成したのち、母型ブランクをプレス加工で逆Ｕ字状に成形して母型とし、この母型を電着層に浸漬して１次電着層と２次電着層とを形成し、２次電着層を母型から剥離することにより、立体形状の外刃を形成することは、特許文献２に公知である。
特開昭５６−１０４６８８号公報（２頁、第６図） 特開２００２−１４３５７３号公報（段落番号００２３、図７） In this type of inner blade, it is known in Patent Document 1 that after forming a sheet-shaped inner blade blank by electroforming, the inner blade blank is press-molded to obtain a bowl-shaped inner blade. After forming a sheet-shaped matrix blank by the photoresist method, the matrix blank is formed into an inverted U shape by press working to form a matrix, and this matrix is immersed in an electrodeposition layer to form a primary electrodeposition layer Patent Document 2 discloses that a three-dimensional outer blade is formed by forming a secondary electrodeposition layer and a secondary electrodeposition layer and peeling the secondary electrodeposition layer from the matrix.
JP-A-56-104688 (page 2, FIG. 6) JP 2002-143573 A (paragraph number 0023, FIG. 7)

特許文献１においては、一群の平行リブと、平行リブに対して一定角度で傾く一群の補強リブとで切刃を構成するので、刃穴形状が平行四辺形状となり、内刃全体がいわゆる網刃状に形成される。そのため、平行リブと補強リブとが互いに補強し合って、内刃の剛性が向上する。しかし、全体が網刃状に形成してあるので、両リブのそれぞれにカウンターシンクが形成してあるとはいえ、内刃の外刃に対する摺接面積が大きくなるのを避けられない。外刃が網刃で形成してある場合には、外刃の刃穴が内刃の平行リブおよび補強リブで塞がれる機会が多いので、ひげを捕捉しにくい不利もある。   In Patent Document 1, since the cutting blade is constituted by a group of parallel ribs and a group of reinforcing ribs inclined at a constant angle with respect to the parallel ribs, the shape of the blade hole is a parallelogram, and the entire inner blade is a so-called mesh blade. It is formed in a shape. Therefore, the parallel rib and the reinforcing rib reinforce each other, and the rigidity of the inner blade is improved. However, since the whole is formed in a mesh blade shape, it is inevitable that the sliding contact area of the inner blade with respect to the outer blade is increased even though countersinks are formed on both ribs. When the outer blade is formed of a mesh blade, there is a disadvantage that it is difficult to capture the whiskers because the blade hole of the outer blade is often closed by the parallel rib and the reinforcing rib of the inner blade.

電鋳法で形成される特許文献２の外刃は、立体形状のままで２次電着を行うので、逆Ｕ字状の表面上下位置の違いによって２次電着層の厚みにばらつきを生じやすい。詳しくは、電着金属との距離が小さく、電流が流れやすい湾曲部分の厚みが、他の部分に比べて分厚くなる傾向があり、外刃の切れ味のシャープさが損なわれる。母型ブランクをプレス加工で逆Ｕ字状に成形する際に、強度の低いレジスト層が剥離欠落したり、変形したりするなどの加工不良を生じやすく、歩留まりが低い点にも問題がある。   Since the outer blade of Patent Document 2 formed by electroforming performs secondary electrodeposition with a three-dimensional shape, the thickness of the secondary electrodeposition layer varies due to the difference in the vertical position of the inverted U-shaped surface. Cheap. Specifically, the thickness of the curved portion where the distance from the electrodeposited metal is small and the current easily flows tends to be thicker than other portions, and the sharpness of the outer blade is impaired. When forming the base blank into an inverted U shape by press working, there is a problem in that a low-strength resist layer is prone to processing defects such as peeling and missing or deformed, and the yield is low.

本発明の目的は、切れ味がよい往復動刃を備えた電気かみそりを提供することにある。   An object of the present invention is to provide an electric razor having a reciprocating blade having a good sharpness.

本発明の電気かみそりは、断面逆Ｕ字状に保形される左右横長の外刃１３と、外刃１３に内接して往復摺動する、小刃３０とスリット３１とが交互に形成される内刃１４とを備えている。 In the electric razor of the present invention, left and right laterally long outer blades 13 that are retained in an inverted U-shaped cross section , and small blades 30 and slits 31 that reciprocate in contact with the outer blades 13 are formed alternately. And an inner blade 14.

小刃３０の切刃先端に傾斜角度が形成されるように、小刃３０とスリット３１とを含むシート状の内刃ブランク４０をエッチング法で形成し、その後、内刃ブランク４０に塑性加工を施すことで、樋体状の内刃１４が形成される。 As the inclination angle the cutting edge tip of the cutter blades 30 are formed, the sheet-shaped inner cutter blank 40 including the cutter blades 30 and the slit 31 is formed by etching, after which the plastic working on the inner cutter blank 40 By applying this, a housing-like inner blade 14 is formed.

樋体状に形成された内刃１４が、上下面が開口する刃装着台２２を含む内刃フレーム２１に固定され、さらに小刃３０の幅寸法に比べてスリット３１の幅寸法が大きく設定されている。さらに、内刃１４の内刃フレーム２１に固定される部分と内刃１４のスリット３１との間にビード状、溝状あるいは薄肉部からなる変形吸収部３４が形成されている。

The inner blade 14 formed in a box shape is fixed to an inner blade frame 21 including a blade mounting base 22 having an open top and bottom surface, and the width dimension of the slit 31 is set larger than the width dimension of the small blade 30. ing. Further, a deformation absorbing portion 34 having a bead shape, a groove shape, or a thin portion is formed between a portion of the inner blade 14 fixed to the inner blade frame 21 and the slit 31 of the inner blade 14.

エッチング法でシート状の内刃ブランク４０を形成したのち、内刃ブランク４０に塑性加工を施して樋体状の内刃１４を形成すると、薄く均一な厚みの内刃ブランク４０を形成でき、内刃ブランク４０を樋体状に曲げ加工して得られる内刃１４の厚み寸法を均一化できる。   After forming the sheet-shaped inner blade blank 40 by the etching method, when the inner blade blank 40 is plastically processed to form the housing-shaped inner blade 14, the inner blade blank 40 having a thin and uniform thickness can be formed. The thickness dimension of the inner blade 14 obtained by bending the blade blank 40 into a housing can be made uniform.

また、エッチング法で内刃ブランク４０を形成すると、外刃１３と摺接する内刃１４の切刃先端を傾斜させることができるので、例えば、精密プレス法で形成した内刃に比べて、内刃１４の切れ味を格段に向上できる。   In addition, when the inner blade blank 40 is formed by the etching method, the cutting edge tip of the inner blade 14 that is in sliding contact with the outer blade 13 can be inclined. For example, compared to the inner blade formed by the precision press method, the inner blade The sharpness of 14 can be remarkably improved.

また、内刃１４が、上下面が開口する刃装着台２２を備えた内刃フレーム２１に固定されるので、内刃１４によってカットされたひげが内刃フレーム２１上に溜り難い。   Further, since the inner blade 14 is fixed to the inner blade frame 21 provided with the blade mounting base 22 whose upper and lower surfaces are open, the whiskers cut by the inner blade 14 are unlikely to accumulate on the inner blade frame 21.

本発明に係る往復動式の電気かみそりの実施例を図１ないし図７に示す。図２において電気かみそりは、本体ケース１と、本体ケース１に差し込み装填される作動ユニットと、本体ケース１の前面に装着されるスイッチパネル２と、ケース後面に配置されるきわぞり刃ユニット３（図４参照）とからなる。スイッチパネル２の上下には、モーター起動用のスイッチノブ４や、運転状態を表示する表示灯５などを設けてある。   An embodiment of a reciprocating electric shaver according to the present invention is shown in FIGS. In FIG. 2, the electric razor includes a main body case 1, an operation unit that is inserted and loaded in the main body case 1, a switch panel 2 that is mounted on the front surface of the main body case 1, and a wavy blade unit 3 that is disposed on the rear surface of the case. (See FIG. 4). At the top and bottom of the switch panel 2, a switch knob 4 for starting the motor, an indicator lamp 5 for displaying the operation state, and the like are provided.

作動ユニットは、下半側の電装品ユニットと、その上部に設けられるかみそりヘッドとからなる。電装品ユニットは、プラスチック成形品からなる電装品ホルダーに、回路基板と、二次電池７と、モーター８などを組み付けて構成してある。回路基板にはスイッチやＬＥＤ、および電子部品などを実装してある。これらの電装品ユニットは本体ケース１内に収容され、密封される。   The operation unit includes a lower half electrical component unit and a razor head provided on the upper part. The electrical component unit is configured by assembling a circuit board, a secondary battery 7, a motor 8 and the like to an electrical component holder made of a plastic molded product. Switches, LEDs, electronic components, and the like are mounted on the circuit board. These electrical component units are accommodated in the main body case 1 and sealed.

図４においてかみそりヘッドには、前後一対のメイン刃１０と、一対のメイン刃１０間に配置されるセンター刃１１と、これらを駆動する駆動機構などを配置する。メイン刃１０は、外刃ホルダー１２で断面逆Ｕ字状に保形される前後一対の外刃１３・１３と、これら外刃１３・１３に内接して往復摺動する内刃１４・１４とからなる。メイン刃１１は、それぞれスリット刃からなる外センター刃１１ａおよび内センター刃１１ｂとで構成する（図５参照）。   In FIG. 4, the razor head is provided with a pair of front and rear main blades 10, a center blade 11 disposed between the pair of main blades 10, and a driving mechanism for driving them. The main blade 10 includes a pair of front and rear outer blades 13 and 13 that are retained in an inverted U-shaped cross section by an outer blade holder 12, and inner blades 14 and 14 that reciprocally slide in contact with the outer blades 13 and 13. Consists of. The main blade 11 includes an outer center blade 11a and an inner center blade 11b each formed of a slit blade (see FIG. 5).

外刃ホルダー１２は、前後一対の外刃１３およびセンター刃１１を支持する内ケース１２ｂと、内ケース１２ｂを支持する外ケース１２ａとに分けて構成する。図３に示すように、本体ケース１の内面左右には、外刃ホルダー１２を係合捕捉するロックボタン１６と、ロックボタン１６を係合姿勢に押圧付勢する圧縮コイル形のばね１７とが組み込まれている。   The outer blade holder 12 is divided into an inner case 12b that supports the pair of front and rear outer blades 13 and the center blade 11, and an outer case 12a that supports the inner case 12b. As shown in FIG. 3, a lock button 16 that engages and captures the outer blade holder 12 and a compression coil-type spring 17 that presses and urges the lock button 16 to the engagement posture are provided on the left and right inner surfaces of the main body case 1. It has been incorporated.

左右のロックボタン１６を同時に押し込み操作すると、外刃ホルダー１２をかみそりヘッドから取り外すことができる。このように、外刃ホルダー１２が、外ケース１２ａと内ケース１２ｂとで構成されていると、内ケース１２ｂと、内ケース１２ｂに組まれた前後の外刃１３、およびセンター刃１１を、ひとつのユニット部品として交換でき、必要に応じて前後の外刃１３とセンター刃１１との三者を個別に交換することができる。   When the left and right lock buttons 16 are pushed in at the same time, the outer blade holder 12 can be removed from the razor head. As described above, when the outer blade holder 12 is constituted by the outer case 12a and the inner case 12b, the inner case 12b, the front and rear outer blades 13 assembled to the inner case 12b, and the center blade 11 are one. The front and rear outer blades 13 and the center blade 11 can be individually replaced as needed.

図示していないが、左右横長の外刃１３はエッチング法、あるいは電鋳法で形成されるシート状の網刃として形成してあり、その前後縁を外刃ホルダー１２の内ケース１２ｂに装着することにより、逆Ｕ字状に保形保持される。装着状態における湾曲部分のうち、図５の符号Ｃで示す領域がひげ切断を行う領域になっており、このひげ切断領域Ｃの内面に内刃１４が密着している。ひげ切断領域Ｃの角度は約１６０度である。   Although not shown, the laterally long outer blade 13 is formed as a sheet-like mesh blade formed by an etching method or an electroforming method, and the front and rear edges thereof are attached to the inner case 12 b of the outer blade holder 12. Thus, the shape is retained in an inverted U shape. Of the curved portion in the mounted state, the region indicated by symbol C in FIG. 5 is a region for cutting the beard, and the inner blade 14 is in close contact with the inner surface of the beard cutting region C. The angle of the beard cutting region C is about 160 degrees.

内刃１４は、図１に示すプラスチック成形品からなる内刃フレーム２１に装着固定する。内刃フレーム２１は、上下面が開口する刃装着台２２と、刃装着台２２の両側上面に突設した一対の保形片２３と、刃装着台２２の下面側に設けられる受動片２４とを一体に備えている。図３に示すように、先の振動子１８の駆動軸１８ａは受動片２４と係合して、往復動力を内刃１４に伝える。刃装着台２２の前後面には、それぞれ内刃１４を溶着固定するための溶着突起２５が５個ずつ形成してある。   The inner blade 14 is attached and fixed to an inner blade frame 21 made of a plastic molded product shown in FIG. The inner blade frame 21 includes a blade mounting base 22 whose upper and lower surfaces are open, a pair of shape retaining pieces 23 projecting from the upper surfaces on both sides of the blade mounting base 22, and a passive piece 24 provided on the lower surface side of the blade mounting base 22. Is integrated. As shown in FIG. 3, the drive shaft 18 a of the previous vibrator 18 is engaged with the passive piece 24 and transmits the reciprocating power to the inner blade 14. Five welding projections 25 for welding and fixing the inner blade 14 are formed on the front and rear surfaces of the blade mounting base 22, respectively.

図３に示すように、モーター８の回転動力は振動子１８で往復動作に変換されて、メイン刃１０の内刃１４と、センター刃１１の内センター刃１１ｂとに同時に伝動される。きわぞり刃ユニット３のスライドノブを待機位置から押し上げ操作することにより、きわぞり刃ユニット３にも往復動力を伝動することができる。図３において符号１９は、振動子１８の外面を覆って密封するヘッドケースである。   As shown in FIG. 3, the rotational power of the motor 8 is converted into a reciprocating motion by the vibrator 18 and transmitted simultaneously to the inner blade 14 of the main blade 10 and the inner center blade 11 b of the center blade 11. The reciprocating power can also be transmitted to the saw blade unit 3 by pushing up the slide knob of the saw blade unit 3 from the standby position. In FIG. 3, reference numeral 19 denotes a head case that covers and seals the outer surface of the vibrator 18.

図１において内刃１４は、前後一対の取付壁２９と、取付壁２９どうしを繋ぐアーチ部分とを備えており、アーチ部分に一群の小刃３０とスリット３１とを交互に形成したスリット刃からなり、隣接する小刃３０の湾曲部分の前後どうしを、スリット３１を斜めに横切る補強リブ３２で連結し補強している。前後の取付壁２９には、それぞれ先の溶着突起２５と係合する溶着穴３３を鍵穴状に形成してある。   In FIG. 1, the inner blade 14 includes a pair of front and rear mounting walls 29 and an arch portion connecting the mounting walls 29, and a slit blade in which a group of small blades 30 and slits 31 are alternately formed on the arch portion. Thus, the front and back of the curved portions of the adjacent small blades 30 are connected and reinforced by reinforcing ribs 32 that obliquely cross the slit 31. The front and rear mounting walls 29 are each formed with a welding hole 33 that engages with the previous welding projection 25 in a keyhole shape.

溶着穴３３とスリット３１との間には、取付壁２９の長手方向に沿ってビード（変形吸収部）３４を内向きに凹み形成してある。ビード３４を設けることにより、内刃１４を内刃フレーム２１に装着する際の寸法のばらつきをビード３４の伸縮変形で吸収できるので、内刃１４の刃面を外刃１３に確実に密着させて、切れ味を向上できる。ビード３４は、小刃３０が部分的にひずむのを解消できるうえ、内刃１４が凹み変形するときの応力を緩和吸収することにも役立っている。

Between the welding hole 3 3 and the slit 31, it is then recessed inwardly forming a bead (deformation absorbers) 34 along the longitudinal direction of the mounting wall 29. By providing the bead 34, variations in dimensions when the inner blade 14 is attached to the inner blade frame 21 can be absorbed by expansion and contraction of the bead 34, so that the blade surface of the inner blade 14 is securely adhered to the outer blade 13. Can improve sharpness. The bead 34 can not only partially distort the small blade 30 but also serves to relax and absorb stress when the inner blade 14 is deformed.

内刃１４と外刃１３とを組み付けた状態において、網刃からなる外刃１３の刃穴が小刃３０で塞がれるのを極力避けて、ひげの捕捉をより確実に行うために、小刃３０の幅寸法に比べて、スリット３１の幅寸法を充分に大きく設定した。この実施例では、図６に示すように小刃３０の幅寸法ｂ１を０．２５ｍｍとするとき、スリット３１の幅寸法ｂ２を１．４５ｍｍとした。補強リブ３２の幅寸法ｂ３は０．２ｍｍとした。   In a state where the inner blade 14 and the outer blade 13 are assembled, a small blade 30 prevents the blade hole of the outer blade 13 made of a mesh blade from being blocked by the small blade 30 as much as possible. Compared with the width dimension of the blade 30, the width dimension of the slit 31 was set sufficiently large. In this embodiment, as shown in FIG. 6, when the width dimension b1 of the blade 30 is 0.25 mm, the width dimension b2 of the slit 31 is 1.45 mm. The width dimension b3 of the reinforcing rib 32 was 0.2 mm.

このように、補強リブ３２の幅寸法ｂ３を小刃３０の幅寸法ｂ１より小さく設定すると、小刃３０と補強リブ３２との接続部分の強度が大きくなりすぎるのを抑止できる。このことは、内刃ブランク４０に曲げ加工を施した状態において、内刃１４の湾曲部分を適正な円弧形状に形成できることを意味している。因みに、補強リブ３２の幅寸法ｂ３が小刃３０の幅寸法ｂ１と同じかこれより大きくなると、小刃３０と補強リブ３２との接続部分の強度が大きくなりすぎ、そのため、内刃ブランク４０に曲げ加工を施した状態において、先の接続部分に他より大きな曲げ応力が発生し、内刃１４の湾曲部分が複数の円弧で形成され、各円弧の隣接部分に角部が形成される。従って、内刃１４を外刃１３に密着させることができなくなる。   Thus, if the width dimension b3 of the reinforcing rib 32 is set to be smaller than the width dimension b1 of the small blade 30, it is possible to prevent the strength of the connecting portion between the small blade 30 and the reinforcing rib 32 from becoming too large. This means that the curved portion of the inner blade 14 can be formed into an appropriate arc shape in a state where the inner blade blank 40 is bent. Incidentally, when the width dimension b3 of the reinforcing rib 32 is equal to or larger than the width dimension b1 of the small blade 30, the strength of the connecting portion between the small blade 30 and the reinforcing rib 32 becomes too large. In a state where the bending process is performed, a bending stress larger than the others is generated in the previous connection portion, the curved portion of the inner blade 14 is formed by a plurality of arcs, and a corner portion is formed in an adjacent portion of each arc. Accordingly, the inner blade 14 cannot be brought into close contact with the outer blade 13.

図５において補強リブ３２は、先のひげ切断領域Ｃにおいて小刃３０とともに外刃１３と摺接している。従って、外刃１３のひげ切断領域Ｃが強い力で肌に押し付けられるとき、内刃１４が内凹み変形しようとするのを規制して、小刃３０を補強する。補強リブ３２は小刃３０と同一平面上に形成してあって、小刃３０と同様にひげ切断を行うことができる。つまり補強リブ３２は切断刃を兼ねる。   In FIG. 5, the reinforcing rib 32 is in sliding contact with the outer blade 13 together with the small blade 30 in the previous beard cutting region C. Therefore, when the whisker cutting area C of the outer blade 13 is pressed against the skin with a strong force, the inner blade 14 is restricted from attempting to deform inwardly, and the small blade 30 is reinforced. The reinforcing rib 32 is formed on the same plane as the small blade 30, and can perform beard cutting similarly to the small blade 30. That is, the reinforcing rib 32 also serves as a cutting blade.

図６に示すように、展開状態における小刃３０が内刃１４の往復方向と直交するリブとして形成してあるのに対し、補強リブ３２は内刃１４の往復方向に対して角度θ（３０度）だけ傾斜する、緩やかな湾曲リブで形成してある。このように、補強リブ３２を内刃１４の往復動方向に対して角度θだけ傾斜させてあると、外刃１３で捕捉したひげを補強リブ３２で斜めに引くようにして切断できるので、補強リブ３２によるひげ切断が円滑かつ確実に行える。補強リブ３２は、外刃１３がスリット刃で形成してある場合に、小刃３０がスリットに嵌り込むのを防ぐことにも役立つ。   As shown in FIG. 6, the small blade 30 in the deployed state is formed as a rib orthogonal to the reciprocating direction of the inner blade 14, whereas the reinforcing rib 32 has an angle θ (30 with respect to the reciprocating direction of the inner blade 14. It is formed of gently curved ribs that are inclined by (degrees). As described above, when the reinforcing rib 32 is inclined by the angle θ with respect to the reciprocating direction of the inner blade 14, the whisker captured by the outer blade 13 can be cut so as to be obliquely pulled by the reinforcing rib 32. The beard cutting by the rib 32 can be performed smoothly and reliably. The reinforcing rib 32 also helps to prevent the small blade 30 from fitting into the slit when the outer blade 13 is formed of a slit blade.

小刃３０の湾曲部分の前後２箇所が補強リブ３２で補強されているので、小刃３０の最も弱い湾曲部分を前後の補強リブ３２で確実に補強できる。さらに、他の部位に比べてひげ切断の機会が多い、小刃３０の上側湾曲部分を避ける前後位置に補強リブ３２を設けるので、上側湾曲部分を開放してスリット３１内へのひげ導入を確実化できる。つまり、補強リブ３２によってひげの導入が阻害されることを極力避けることができる。外刃１３と内刃１４との間に毛屑がたまるのを防止できる利点もある。   Since the two front and rear portions of the curved portion of the small blade 30 are reinforced by the reinforcing ribs 32, the weakest curved portion of the small blade 30 can be reliably reinforced by the front and rear reinforcing ribs 32. Furthermore, since the reinforcing rib 32 is provided at the front and rear positions where the upper curved portion of the small blade 30 is avoided, which has more opportunities for cutting the beard than other portions, the upper curved portion is opened and the beard introduction into the slit 31 is ensured. Can be That is, it is possible to avoid as much as possible that the introduction of the whiskers is inhibited by the reinforcing ribs 32. There is also an advantage that fouling can be prevented from accumulating between the outer blade 13 and the inner blade 14.

内刃１４は、図６に示すシート状の内刃ブランク４０をエッチング法で形成したのち、図７（ａ）に示すように、一対の金型４１・４２で内刃ブランク４０に塑性加工を施してビード３４を形成し、図７（ｂ）〜（ｃ）に示すように、前段曲げ用の金型４３・４４で台形状に曲げ加工を施し、さらに次段曲げ用の金型４５・４６で曲げ加工を施して断面逆Ｕ字状に形成する。これにより、樋体形状を自己保持できる内刃１４が得られる。なお、内刃ブランク４０の形成素材は、厚み寸法が０．３ｍｍのステンレス板材である。   After forming the sheet-like inner blade blank 40 shown in FIG. 6 by the etching method, the inner blade 14 performs plastic working on the inner blade blank 40 with a pair of molds 41 and 42 as shown in FIG. 7 (b) to 7 (c), the bend 34 is bent into a trapezoidal shape with the former bending dies 43 and 44, and the next bending dies 45 · Bending is performed at 46 to form an inverted U-shaped cross section. Thereby, the inner blade 14 which can hold | maintain a housing shape self is obtained. The material for forming the inner blade blank 40 is a stainless steel plate having a thickness dimension of 0.3 mm.

上記の内刃製造方法によれば、エッチング法によってシート状の内刃ブランク４０を形成するので、均一な厚みの内刃ブランク４０が得られる。こののち、内刃ブランク４０に塑性加工を施して樋体状の内刃１４を形成するので、曲げ加工時に内刃ブランク４０の一部が欠損したり、あるいは変形したりするなどの加工不良を生じることがなく、立体的な電鋳法によって形成していた従来の外刃製造方法に比べて、内刃１４の歩留まりが著しく向上し、その製造コストを削減できる。エッチング法で内刃ブランク４０を形成すると、図３の拡大図に示すように、エッチング液の侵食作用によって、外刃１３と摺接する小刃３０の切刃先端を傾斜させることができるので、たとえば精密プレス法で形成した内刃に比べて、内刃１４の切れ味を格段に向上できる。小刃３０の切刃先端の傾斜角度を符号αで示している。   According to said inner blade manufacturing method, since the sheet-like inner blade blank 40 is formed by the etching method, the inner blade blank 40 having a uniform thickness is obtained. After that, the inner blade blank 40 is subjected to plastic working to form the housing-shaped inner blade 14, so that a processing defect such as a part of the inner blade blank 40 being lost or deformed during bending is obtained. Compared with the conventional outer blade manufacturing method formed by the three-dimensional electroforming method, the yield of the inner blade 14 is remarkably improved and the manufacturing cost can be reduced. When the inner blade blank 40 is formed by the etching method, as shown in the enlarged view of FIG. 3, the cutting edge tip of the small blade 30 that is in sliding contact with the outer blade 13 can be inclined by the erosion action of the etching solution. The sharpness of the inner blade 14 can be significantly improved compared to the inner blade formed by the precision press method. The inclination angle of the cutting edge tip of the small blade 30 is indicated by the symbol α.

変形吸収部３４はビード状に形成する必要はなく、図８（ａ）に示すように取付壁２９にハーフエッチングを施して溝状の薄肉部を形成し、この薄肉部を変形吸収部３４とすることができる。同様に、図８（ｂ）に示すように、取付壁２９に切削加工（ニッチ加工）を施して変形吸収部３４とすることができる。なお、変形吸収部３４は、内刃１４の往復方向に沿って連続していることが好ましいが、必要があれば断続的に形成することができる。取付壁２９の側をアーチ部より薄肉に形成して、取付壁２９とアーチ部との隣接部分を変形吸収部３４とすることができる。   The deformation absorbing portion 34 does not need to be formed in a bead shape. As shown in FIG. 8A, the mounting wall 29 is half-etched to form a groove-shaped thin portion, and this thin portion is combined with the deformation absorbing portion 34. can do. Similarly, as shown in FIG. 8 (b), the attachment wall 29 can be cut (niche) to form the deformation absorbing portion 34. In addition, although it is preferable that the deformation | transformation absorption part 34 is continuing along the reciprocating direction of the inner blade 14, if necessary, it can form intermittently. The side of the mounting wall 29 can be formed thinner than the arch portion, and the adjacent portion between the mounting wall 29 and the arch portion can be used as the deformation absorbing portion 34.

上記の実施例以外に、小刃３０は内刃１４の往復方向と直交する必要はなく、一定角度で傾斜していてもよく、湾曲形状であってもよい。同様に、補強リブ３２は直線状、あるいはクランク形状など非直線形状であってもよく、要は隣接する小刃３０どうしを連結する構造であれば、その形状は限定されない。   Other than the above embodiment, the small blade 30 does not have to be orthogonal to the reciprocating direction of the inner blade 14, and may be inclined at a constant angle or may be curved. Similarly, the reinforcing rib 32 may be linear or non-linear such as a crank shape, and the shape of the reinforcing rib 32 is not limited as long as the adjacent small blades 30 are connected to each other.

上記の実施例では、本発明をメイン刃１０に適用した場合について説明したが、本発明はセンター刃１１の内センター刃１１ｂに適用することもできる。外刃ホルダー１２は１個の独立部品で構成することができ、実施例で説明したように外ケース１２ａと内ケース１２ｂとで構成する必要はない。必要があれば、小刃３０と補強リブ３２とを要素部品として形成しておき、その一群を内刃フレーム２１にインサート固定したうえで、補強リブ３２を隣接する小刃３０に溶接し、研磨加工を施して内刃１４を構成することができる。   In the above embodiment, the case where the present invention is applied to the main blade 10 has been described. However, the present invention can also be applied to the inner center blade 11 b of the center blade 11. The outer blade holder 12 can be composed of one independent component, and does not need to be composed of the outer case 12a and the inner case 12b as described in the embodiment. If necessary, the small blade 30 and the reinforcing rib 32 are formed as element parts, and a group of them is insert-fixed to the inner blade frame 21, and then the reinforcing rib 32 is welded to the adjacent small blade 30 and polished. The inner blade 14 can be configured by processing.

内刃の分解斜視図である。It is a disassembled perspective view of an inner blade. 電気かみそりの正面図である。It is a front view of an electric razor. 電気かみそりの縦断正面図である。It is a vertical front view of an electric razor. かみそりヘッドの縦断側面図である。It is a vertical side view of a razor head. メイン刃およびセンター刃の縦断側面図である。It is a vertical side view of a main blade and a center blade. 内刃ブランクの平面図である。It is a top view of an inner blade blank. 内刃の製造過程を示す説明図である。It is explanatory drawing which shows the manufacturing process of an inner blade. 変形吸収部の別の実施例を示す断面図である。It is sectional drawing which shows another Example of a deformation | transformation absorption part.

符号の説明Explanation of symbols

１３ 外刃
１４ 内刃
２１ 内刃フレーム
２２ 刃装着台
２９ 取付壁
３０ 小刃
３１ スリット
４０ 内刃ブランク 13 Outer blade 14 Inner blade 21 Inner blade frame 22 Blade mounting base 29 Mounting wall 30 Small blade 31 Slit 40 Inner blade blank

Claims (1)

断面逆Ｕ字状に保形される左右横長の外刃（１３）と、外刃（１３）に内接して往復摺動する、小刃（３０）とスリット（３１）とが交互に形成される内刃（１４）とを備えた電気かみそりであって、
小刃（３０）の切刃先端に傾斜角度が形成されるように、小刃（３０）とスリット（３１）とを含むシート状の内刃ブランク（４０）をエッチング法で形成し、その後、内刃ブランク（４０）に塑性加工を施すことで、樋体状の内刃（１４）が形成され、
樋体状に形成された内刃（１４）が、上下面が開口する刃装着台（２２）を含む内刃フレーム（２１）に固定され、さらに小刃（３０）の幅寸法に比べてスリット（３１）の幅寸法が大きく設定されており、
内刃（１４）の内刃フレーム（２１）に固定される部分と内刃（１４）のスリット（３１）との間にビード状、溝状あるいは薄肉部からなる変形吸収部（３４）が形成されていることを特徴とする電気かみそり。 Left and right laterally long outer blades (13) retained in an inverted U-shaped cross-section, and small blades (30) and slits (31) that reciprocate in contact with the outer blades (13) are alternately formed. An electric razor with an inner blade (14)
The sheet-shaped inner blade blank (40) including the small blade (30) and the slit (31) is formed by an etching method so that an inclination angle is formed at the cutting edge tip of the small blade (30), and then By performing plastic working on the inner blade blank (40), a rod-shaped inner blade (14) is formed,
The inner blade (14) formed in a box shape is fixed to the inner blade frame (21) including the blade mounting base (22) whose upper and lower surfaces are open, and is further slit compared to the width dimension of the small blade (30). The width dimension of (31) is set large,
A deformation absorbing portion (34) having a bead shape, a groove shape, or a thin portion is formed between a portion of the inner blade (14) fixed to the inner blade frame (21) and the slit (31) of the inner blade (14). Electric razor characterized by being.
JP2006233285A 2006-08-30 2006-08-30 Electric razor Expired - Lifetime JP4037439B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102039604A (en) * 2009-10-21 2011-05-04 九州日立麦克赛尔株式会社 Rotator blade and small electric instrument having rotator blade

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4225329B2 (en) * 2006-07-21 2009-02-18 パナソニック電工株式会社 Electric razor
JP6300226B2 (en) * 2013-12-16 2018-03-28 株式会社泉精器製作所 Reciprocating electric razor
JP5968354B2 (en) * 2014-04-11 2016-08-10 日立マクセル株式会社 Electric razor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102039604A (en) * 2009-10-21 2011-05-04 九州日立麦克赛尔株式会社 Rotator blade and small electric instrument having rotator blade
CN102039604B (en) * 2009-10-21 2014-08-20 九州日立麦克赛尔株式会社 Rotator blade and small electric instrument having rotator blade

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