JPH0630696B2 - Electric razor blade - Google Patents
Electric razor bladeInfo
- Publication number
- JPH0630696B2 JPH0630696B2 JP18634385A JP18634385A JPH0630696B2 JP H0630696 B2 JPH0630696 B2 JP H0630696B2 JP 18634385 A JP18634385 A JP 18634385A JP 18634385 A JP18634385 A JP 18634385A JP H0630696 B2 JPH0630696 B2 JP H0630696B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- electric razor
- layer
- razor blade
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 〔技術分野〕 この発明は、電気カミソリの外刃あるいは内刃に関す
る。TECHNICAL FIELD The present invention relates to an outer blade or an inner blade of an electric razor.
電気カミソリ刃としては、これまでステンレス鋼やニッ
ケル合金を母材とし、その表面に特殊なコーティングを
施したものが一般的であった。たとえば、ステンレス鋼
材の表面に硬いチタン窒化物をイオン蒸着技術などでコ
ーティングして、その表面の硬度を高くしたものなどが
用いられてきた。しかし、イオンプレーティング法やイ
オンスパッタリング法などのようなイオン蒸着技術によ
り作成したコーティング層は、母材のステンレス鋼との
密着性が悪く、そのため、母材表面に形成されたＴｉ
Ｎ，ＣｒＮなどの層が剥離しやすかった。Conventionally, electric razor blades have generally been made of stainless steel or nickel alloy as a base material and have a special coating on the surface. For example, a surface of a stainless steel material coated with a hard titanium nitride by an ion deposition technique or the like to increase the hardness of the surface has been used. However, a coating layer formed by an ion deposition technique such as an ion plating method or an ion sputtering method has poor adhesion to the base material stainless steel, and therefore the Ti layer formed on the surface of the base material is poor.
The layers such as N and CrN were easy to peel off.
そのような欠点を無くするため、母材表面に種々の特殊
な前処理を行うことが工夫されたが、均一に処理するこ
とが難しく、製品にバラツキが生じるのは避け難かっ
た。また、母材とコーティング層との間に生ずる電位差
によって錆やすいという問題もあった。In order to eliminate such a defect, various special pretreatments have been devised on the surface of the base material, but it is difficult to perform uniform treatment and it is difficult to avoid variations in products. In addition, there is a problem that rust is likely to occur due to a potential difference generated between the base material and the coating layer.
一方、前記イオン蒸着技術によって作成されたコーティ
ング層は、通常数ミクロンのオーダーの薄膜であり、母
材とも明確に層別されているため、母材とコーティング
層間の硬度差が大きい。その結果、カミソリ刃のカッテ
ィングエッジに髭や異物などが当たると、母材が塑性変
形してコーティング層が徐々にカッティングエッジから
はくりするようになり、実質的に寿命の長いカミソリ刃
が得られないという問題があった。On the other hand, the coating layer formed by the ion deposition technique is usually a thin film of the order of several microns and is clearly layered with the base material, so that the hardness difference between the base material and the coating layer is large. As a result, when a beard or foreign matter hits the cutting edge of the razor blade, the base material plastically deforms and the coating layer gradually peels off from the cutting edge, resulting in a razor blade with a substantially long life. There was a problem of not having.
このような問題を解消するため、たとえば、ステンレス
鋼あるいは炭素鋼の表面に炭素を浸炭させる技術が開発
された（特公昭５８−３６９９１号公報参照）。しか
し、一般に鋼材の炭素量が増加すれば耐食性が悪くな
り、そのような素材をカミソリ刃として用いると表面部
分が腐食しやすいという欠点があった。表面部分の耐食
性を良くするため、表面層には内部に比べて低炭素の鋼
材をクラッドした複合鋼をカミソリ刃に用いるという技
術が開発された（特公昭５８−３５７１４号参照）。し
かし、素材の表面層より低炭素にすれば、表面の硬度を
犠牲にせざるを得ず、刃先寿命が低下するなどの問題が
生ずる。In order to solve such a problem, for example, a technique for carburizing the surface of stainless steel or carbon steel with carbon has been developed (see Japanese Patent Publication No. 58-36991). However, in general, when the carbon content of the steel material increases, the corrosion resistance deteriorates, and when such a material is used as a razor blade, the surface portion is easily corroded. In order to improve the corrosion resistance of the surface portion, a technique has been developed in which a composite steel clad with a steel material having a carbon content lower than that of the inside is used for a razor blade for the surface layer (see Japanese Patent Publication No. 58-35714). However, if the carbon content is lower than that of the surface layer of the material, the hardness of the surface must be sacrificed, and problems such as shortening the blade edge life occur.
そこで、このような複合鋼を１０００℃以上に加熱した
後焼入れする熱処理を行うことによって、上記問題を解
消する工夫がなされたが、未だ十分とは言い難かった。Then, a heat treatment for heating such a composite steel to 1000 ° C. or more and then quenching was performed to solve the above problem, but it was still not sufficient.
また、従来の技術では、熱処理後研削をして刃穴を形成
する際、素材の表面硬度が低いため、カッティングエッ
ジに返りが生じ、この返りを除去するのに特別な工数を
要するなど工程数が多く、製造コストの高いものとなっ
ていた。Further, in the conventional technique, when the blade hole is formed by grinding after the heat treatment, the surface hardness of the material is low, so that the cutting edge has a return, and a special man-hour is required to remove this return. However, the manufacturing cost was high.
この発明は、耐食性が高く、切れ味の低下が少なくて寿
命が長く、かつ、製造コストの低いカミソリ刃を提供す
ることを目的とする。An object of the present invention is to provide a razor blade having high corrosion resistance, less deterioration in sharpness, long life, and low manufacturing cost.
上記目的を達成するため、この発明は、少なくとも刃部
において、母材がチタンまたはチタン合金であり、その
表面から内部に向けて窒素含有量が次第に低くなってい
る電気カミソリ刃を要旨とする。In order to achieve the above object, the present invention provides an electric razor blade having a base material of titanium or a titanium alloy at least in a blade portion, and a nitrogen content gradually decreasing from the surface toward the inside.
以下にこれを、その実施例をあらわす図面に基づき詳し
く説明する。Hereinafter, this will be described in detail with reference to the drawings showing an embodiment thereof.
第１図は、この発明にかかるカミソリ刃を使用した電気
カミソリ１の刃付近の構造を示す。第２図は、第１図に
使用した(a)外刃２および(b)内刃３の外観を示す。第１
図にみるように、電気カミソリ１は、内刃３に摺動運動
を与える駆動子６を内部に有し、摺動する内刃３とその
外縁に位置する外刃２により髭を切断（剪断）するよう
になっている。その際、必要に応じ、刃部分が上下運動
して髭を剃りやすくできるように、押上げばねが内部に
設けれている。外刃２は、第２図(a)にみるように、こ
れを電気カミソリ本体に固着するための外枠２１内に、
髭を取り込むためのメッシュ状の貫通孔を多数有する刃
部２０が設けられてなる。FIG. 1 shows a structure near a blade of an electric razor 1 using a razor blade according to the present invention. FIG. 2 shows the outer appearance of (a) the outer blade 2 and (b) the inner blade 3 used in FIG. First
As shown in the figure, the electric razor 1 internally has a driver 6 that gives a sliding motion to the inner blade 3, and the whiskers are cut (sheared) by the sliding inner blade 3 and the outer blade 2 located at the outer edge thereof. ). At that time, a push-up spring is provided inside so that the blade portion can move up and down to shave easily if necessary. As shown in FIG. 2 (a), the outer blade 2 is provided in an outer frame 21 for fixing it to the main body of the electric razor,
A blade portion 20 having a large number of mesh-shaped through holes for taking in a beard is provided.
内刃３は、第２図(b)にみるように、一定間隔に設けら
れた多数の弧状の刃部３１よりなっている。刃部は、以
下のようにして窒化処理されている。As shown in FIG. 2 (b), the inner blade 3 is composed of a large number of arc-shaped blade portions 31 provided at regular intervals. The blade portion is nitrided as follows.
第３図は、電気カミソリ用外刃２の製造工程の概略を示
す。母材には、伸びが高く、一般のステンレス鋼より凹
凸状の成形加工がしやすいチタン（チタン合金を含む。
以下同じ）の薄板焼鈍材を使用し、これをプレス加工な
どによって第３図(a)のような凹凸の断面形状の刃部２
０を有する刃板７を得た。ついで、真空窒化処理を行う
ため、成形した刃板７を処理槽に配置した。真空窒化処
理装置としては市販のものを使用した。刃板７を配置し
た処理槽の内部を１０-3torr以下の高真空とした後、徐
々に加熱，昇温させ、約８５０℃に達したところで、処
理槽内に窒素ガスを導入した。そのまま約３０分間保持
し、その後、処理層の内部を開放することなく炉冷し
た。このときの真空窒化処理ダイアグラムを第４図に示
す。第４図には、刃板７を処理槽内に配置した後、加熱
するまでの時間経過を省略してある。窒化処理温度を約
８５０℃としてのは、チタンの変態温度以下において活
性化したチタン材表面に短時間で窒化処理を行うためで
ある。この場合の保持時間は３０分以内が好ましい。前
記温度で保持時間を３０分以上にすると、刃板７の外表
面から中心部まで窒化が進行し、刃板７の大部分が脆い
ＴｉＮ2層またはＴｉＮ層となって、使用時に破損しや
すくなるなど実用上の問題が生ずるようになる傾向があ
るからである。FIG. 3 shows an outline of a manufacturing process of the outer blade 2 for an electric razor. The base metal contains titanium (titanium alloy, which has high elongation and is easier to form unevenness than general stainless steel.
The same shall apply hereinafter) is used, and the blade portion 2 having an uneven cross-sectional shape as shown in FIG. 3 (a) is used by press working etc.
A blade plate 7 having 0 was obtained. Then, in order to perform the vacuum nitriding treatment, the formed blade plate 7 was placed in the treatment tank. A commercially available vacuum nitriding apparatus was used. After the inside of the treatment tank in which the blade plate 7 was arranged was set to a high vacuum of 10 −3 torr or less, the temperature was gradually raised and the temperature was raised. When the temperature reached about 850 ° C., nitrogen gas was introduced into the treatment tank. It was held as it was for about 30 minutes, and then, the furnace was cooled without opening the inside of the treatment layer. The vacuum nitriding treatment diagram at this time is shown in FIG. In FIG. 4, after the blade plate 7 is placed in the processing tank, the time elapsed until heating is omitted. The nitriding temperature is set to about 850 ° C. because the surface of the titanium material activated below the transformation temperature of titanium is subjected to the nitriding treatment in a short time. In this case, the holding time is preferably 30 minutes or less. If the holding time is 30 minutes or more at the above temperature, nitriding proceeds from the outer surface of the blade plate 7 to the central portion, and most of the blade plate 7 becomes a brittle TiN 2 layer or TiN layer, which easily breaks during use. This is because there is a tendency for practical problems to occur.
なお、真空窒化処理条件は、刃板７の厚さに対応して、
昇温速度，加熱保持温度，保持時間，窒素ガス量，冷却
速度などを適宜制御するよう選択することができる。The vacuum nitriding processing conditions correspond to the thickness of the blade plate 7,
The temperature rising rate, the heating / holding temperature, the holding time, the nitrogen gas amount, the cooling rate, etc. can be selected as appropriate.
真空窒化処理後の刃板７の断面形状を、第３図(b)に示
す。この処理によって刃板７の表面から窒素が拡散浸透
して母材のチタンと反応し、その表面から中心部にかけ
て窒素濃度に応じた化合物層が形成された。第５図(a)
に、刃板７の表面に形成された窒化物層の窒素含有量の
分布を概念的にあらわす。表面から順次ＴｉＮ2の多い
層，ＴｉＮの多い層，Ｔｉ2Ｎの多い層が連続的に形成
され、中心部には母材であるＴｉ層が残る多層構造とな
った。このときの最表面層であるＴｉＮ2の多い層の硬
度（Ｈｖ）は１８００以上であり、中心部のＴｉ層の硬
度（Ｈｖ）は約２００であった。The cross-sectional shape of the blade plate 7 after the vacuum nitriding treatment is shown in FIG. 3 (b). By this treatment, nitrogen diffused and permeated from the surface of the blade plate 7 and reacted with titanium as a base material, and a compound layer corresponding to the nitrogen concentration was formed from the surface to the central portion. Fig. 5 (a)
First, the distribution of the nitrogen content of the nitride layer formed on the surface of the blade plate 7 is conceptually shown. A layer having a large amount of TiN 2, a layer having a large amount of TiN, and a layer having a large amount of Ti 2 N were successively formed from the surface, and a Ti layer as a base material remained in the central portion to form a multilayer structure. At this time, the hardness (Hv) of the TiN 2 rich layer, which is the outermost surface layer, was 1800 or more, and the hardness (Hv) of the central Ti layer was about 200.
このような窒化処理法によれば、刃板７の最表面の硬度
が高く、刃板７の中心部に行くに従い連続的に硬度が低
下するとともに、逆に、中心部は靱性が高いカミソリ刃
が得られるのである。なお、通常の窒化処理が数十時間
を要するのに比べると、上記真空窒化処理法は、第４図
にみるように、極めて短時間で所定のカミソリ刃を得る
ことができるため、生産性を向上させ製造コストを下げ
るのに都合がよい。According to such a nitriding method, the hardness of the outermost surface of the blade plate 7 is high, and the hardness is continuously reduced toward the central portion of the blade plate 7, and conversely, the central portion is a razor blade having high toughness. Is obtained. It should be noted that, compared with the usual nitriding treatment which requires several tens of hours, the vacuum nitriding treatment method can obtain a predetermined razor blade in a very short time as shown in FIG. It is convenient to improve and lower the manufacturing cost.
窒化処理された刃の表面は黄金色を呈していた。これは
表面の窒化チタン化合物によるものと思われる。The surface of the nitriding-treated blade had a golden color. This is probably due to the titanium nitride compound on the surface.
窒化処理を施された刃板７は、その後、第３図(c)に示
すように、その表面が研削されて刃穴８が形成される。
刃板７の研削面１０にはカッティングエッジ９があらわ
れる。カッティングエッジ９の部分は、第５図(b)でみ
るように、最も硬度の高い窒化物層（ＴｉＮ2層）で構
成される。最外層がこのように硬度が高く脆い窒化物層
で構成されているため、刃板７を研削する際、材料の塑
性流動が少なく、結果としてカッティングエッジに返り
が生じない。The surface of the nitriding blade plate 7 is then ground to form blade holes 8 as shown in FIG. 3 (c).
A cutting edge 9 appears on the grinding surface 10 of the blade plate 7. The cutting edge 9 is composed of a nitride layer (TiN 2 layer) having the highest hardness, as shown in FIG. 5 (b). Since the outermost layer is composed of such a nitride layer having high hardness and brittleness, when the blade plate 7 is ground, the plastic flow of the material is small, and as a result, the cutting edge does not return.
この発明にかかる電気カミソリ刃は、以上のような構成
になっているため、母材と表面の窒化物層が剥離するこ
とがなく、また靱性に富む母材がカッティングエッジに
加わる衝撃を吸収するので、エッジ部にチッピングが生
ずることがない。その結果、長く使用してもカミソリ刃
の切れ味が低下することなく寿命が長くなる。一方、母
材には耐食性に優れたチタンを使用し、その表面から徐
々に窒素濃度が低くなる窒化物層が均質に形成されてい
るので、耐食性に優れたカミソリ刃が得られる。Since the electric razor blade according to the present invention is configured as described above, the base material and the nitride layer on the surface are not separated, and the base material with high toughness absorbs the impact applied to the cutting edge. Therefore, chipping does not occur at the edge portion. As a result, even if it is used for a long time, the sharpness of the razor blade is not deteriorated and the service life is extended. On the other hand, titanium, which has excellent corrosion resistance, is used as the base material, and a nitride layer having a gradually lower nitrogen concentration is uniformly formed from the surface thereof, so that a razor blade having excellent corrosion resistance can be obtained.
この発明にかかる電気カミソリ刃は、これを作るときの
焼鈍サイクルに要する時間が短く、生産性が高いので、
製造コストを低くすることができる。加えて、熱処理後
のカミソリ刃を研削する際、返りがほとんど生じないの
で、従来技術で行われていたような返りを除くための特
別な工数は不要であり、この点からもこの発明にかかる
電気カミソリ刃の製造コストは低いものとなる。The electric razor blade according to the present invention has a short time required for the annealing cycle when making it, and has high productivity.
Manufacturing costs can be reduced. In addition, when the razor blade after the heat treatment is ground, the return hardly occurs, so that a special man-hour for removing the return, which is performed in the conventional technique, is not necessary, and the present invention also relates to this point. The manufacturing cost of the electric razor blade is low.
さらに、この発明にかかる電気カミソリ刃は、その表面
の窒化物層が黄金色を呈するので、製品に高級品として
のイメージを与えるなど商品価値を高めることができ
る。Furthermore, since the nitride layer on the surface of the electric razor blade according to the present invention exhibits a golden color, it is possible to enhance the commercial value such as giving the image of a high-grade product.
第１図はこの発明にかかる電気カミソリ刃を使用した電
気カミソリの部分断面図であり、第２図(a)は同上の電
気カミソリの外刃の斜視図、第２図(b)は同じく内刃の
斜視図であり、第３図(a)，(b)，(c)はこの発明にかか
る電気カミソリ刃の製造工程をあらわし、(a)はプレス
加工後の刃板の断面図であり、(b)は真空窒化処理後の
刃板の断面図であり、(c)は表面を研削した後の刃板の
断面図であり、第４図はこの発明にかかる電気カミソリ
刃の真空窒化処理法の一実施例をあらわすダイヤグラム
であり、第５図(a)は真空窒化処理後の刃板表面の窒化
物層を概念的にあらわす拡大断面図であり、(b)は研削
した刃板表面の窒化物層を概念的にあらわした拡大断面
図である。 １…電気カミソリ、２…外刃、３…内刃、２０…刃部FIG. 1 is a partial sectional view of an electric razor using an electric razor blade according to the present invention, FIG. 2 (a) is a perspective view of an outer blade of the electric razor, and FIG. FIG. 3 is a perspective view of a blade, FIGS. 3 (a), (b), and (c) show a manufacturing process of an electric razor blade according to the present invention, and (a) is a cross-sectional view of a blade plate after press working. , (B) is a sectional view of the blade plate after vacuum nitriding treatment, (c) is a sectional view of the blade plate after the surface is ground, and FIG. 4 is a vacuum nitriding of the electric razor blade according to the present invention. Fig. 5 is a diagram showing an example of a treatment method, Fig. 5 (a) is an enlarged sectional view conceptually showing the nitride layer on the surface of the blade plate after vacuum nitriding treatment, and (b) is a ground blade plate. FIG. 3 is an enlarged cross-sectional view conceptually showing a nitride layer on the surface. 1 ... Electric razor, 2 ... Outer blade, 3 ... Inner blade, 20 ... Blade part
Claims (1)
たはチタン合金であり、その表面から内部に向けて窒素
含有量が次第に低くなっている電気カミソリ刃。1. An electric razor blade having a base material made of titanium or a titanium alloy at least in a blade portion and having a nitrogen content gradually decreasing from the surface toward the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18634385A JPH0630696B2 (en) | 1985-08-23 | 1985-08-23 | Electric razor blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18634385A JPH0630696B2 (en) | 1985-08-23 | 1985-08-23 | Electric razor blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6244283A JPS6244283A (en) | 1987-02-26 |
| JPH0630696B2 true JPH0630696B2 (en) | 1994-04-27 |
Family
ID=16186694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18634385A Expired - Lifetime JPH0630696B2 (en) | 1985-08-23 | 1985-08-23 | Electric razor blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630696B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634687U (en) * | 1992-10-12 | 1994-05-10 | 喜太郎 伊藤 | Airsoft gun target |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2614505B2 (en) * | 1988-12-01 | 1997-05-28 | 三洋電機株式会社 | Electric razor blade having a diamond-like surface layer and method for producing the same |
| FR2763604B1 (en) * | 1997-05-23 | 1999-07-02 | Innovatique Sa | PROCESS FOR THE FORMATION, BY A THERMOCHEMICAL TREATMENT WITHOUT PLASMA, OF A SURFACE LAYER HAVING A HIGH HARDNESS |
| JP4496701B2 (en) * | 2002-05-27 | 2010-07-07 | パナソニック電工株式会社 | Cutting tool processing method and apparatus, and inner blade for electric razor |
-
1985
- 1985-08-23 JP JP18634385A patent/JPH0630696B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634687U (en) * | 1992-10-12 | 1994-05-10 | 喜太郎 伊藤 | Airsoft gun target |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6244283A (en) | 1987-02-26 |
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