JPS60163681A - Electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotary or vibrating electric shaver, and particularly to the structure of an outer cutter thereof.

[Background of the invention]

Conventional electric razor outer blades are made of materials such as nickel or stainless steel, so if used for a long period of time, they will discolor due to sweat and other factors, reducing the product's value. Further, it has drawbacks such as high frictional resistance between the outer cutter and the inner cutter, a heavy sliding load, and high power consumption.

[Purpose of the invention]

The purpose of the present invention is to eliminate such drawbacks of the prior art,
To provide an electric shaver with excellent durability and low sliding resistance.

[Summary of the invention]

In order to achieve this object, the present invention provides that a nitride film made of nitride of one or more elements selected from the group of silicon, aluminum and chromium is formed on the surface of the outer cutter. This is a characteristic feature.

A thin film made of a nitride of one or more elements selected from the group of silicon, aluminum and chromium has excellent corrosion resistance, and nitrides of silicon and aluminum have particularly good properties when the nitrogen content is about 30 at.% or more. It has excellent corrosion resistance and is transparent, so it does not spoil the appearance of the outer cutter. - The chromium compound has a silver-white metallic luster and does not damage the appearance of the outer blade, and if the nitrogen content is about 30 atomic percent or more, it does not have any adverse effects on the skin such as rashes. .

The thickness of the nitride film needs to be about 200λ or more from the viewpoint of corrosion resistance, and preferably 500 to 5000λ. The nitride film is formed using high frequency magnetron sputtering method,
Examples include ion beam sputtering method and ion plate ink method. The gas used in the high frequency magnetron sputtering method is a mixed gas of argon and nitrogen, and if the gas ratio of nitrogen to argon is about 1:3, the nitrogen content of the formed film will be about 30 atomic %. Naturally, when the amount of argon is reduced, the nitrogen content increases, and when the gas ratio of nitrogen to argon is set to 1:1, the nitrogen content becomes about 50 atomic %.

[Embodiments of the invention]

Next, examples of the present invention will be described.

Example 1 The figure is a schematic configuration diagram of a high frequency magnetron sputtering apparatus used in Example 1. In the figure, 1 is argon gas, 2 is nitrogen gas, 3 is outer blade, 4 is a target such as aluminum, silicon or chromium, 5 is magnet, 6 is high frequency power supply, 7 is exhaust, 8 is earth shield, 9 is outer The blade holder 10 is a processing container.

A predetermined number of outer blades 3 made of electroformed nickel blades are held in a holder 9, silicon is used as the target 4, and the inside of the processing container 10 is reduced in pressure by exhaust 7, and then argon gas 1 and nitrogen gas 2 are heated at a gas pressure ratio. The total gas pressure is 5X10 after various changes.
Send it so that it becomes Torr. Then, silicon is sputtered with a high frequency power of 500 W, and a silicon crab film with a thickness of 2000λ is formed on the surface of the outer cutter 3 by adjusting the processing time.

Example 2 Using the outer cutter 3 made of a nickel electroformed blade and using aluminum for the target 4, a film with a thickness of 2 oo
An aluminum nitride film of oA was formed on the surface of the outer cutter 30.

Note that both argon gas pressure and nitrogen gas pressure are 2X1
01"orr, high frequency power is 500W, and sputtering time is 7 minutes.

Example 3 A chromium nitride film with a thickness of 2000λ was formed on the surface of the outer blade 30 by high-frequency magnetron sputtering in the same manner as in Example 1, using an outer cutter 3 made of a Niacel electroformed blade and using chromium as the target 4. did. Note that the argon gas pressure was 2×10 Torr.

The nitrogen gas pressure was 3×10 1'orγ, the high frequency power was 600 W, and the sputtering time was 6 minutes.

Example 4 An aluminum nitride film was formed on the surface using a stainless steel outer cutter 3 under the same conditions as Example 2 except for the outer cutter 3 made of stainless steel.

Comparative Example 1 An outer blade made of a nickel electroformed blade and with no nitride film formed on the surface.

Comparative example 2 The outer blade is made of stainless steel and does not form a nitride film on the surface.

〔Effect of the invention〕

The outer blades on each side were immersed in artificial juice, and the number of days until they changed color was determined and is shown in the table below.

As is clear from the table, it is possible to provide an electric shaver that has excellent durability and low sliding resistance, in other words, low power consumption.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram of a high frequency magnetron sputtering apparatus used in an embodiment of the present invention. 1...Argon gas, 2...Nitrogen g l
3...Outer blade, 4...Target, 5...Magnet.

Claims (1)

[Scope of Claims] (1) An electric shaver characterized by using an outer cutter having a nitride film formed on its surface. (2. Claim (1)), wherein the nitride film is made of a nitride of at least one element selected from the group of silicon, aluminum, and chromium. (3) An electric shaver according to claim (2), characterized in that the nitrogen content in the nitride film is about 30 atomic % or more.