JPS60163680A - 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 electric razors such as rotary or vibrating razors, and particularly to the structure of the inner blade thereof.

[Background of the invention]

Conventional electric shavers suffer from problems such as high friction between the rotating or reciprocating inner cutter and the outer cutter, resulting in large wear on the outer or inner cutter, and high sliding load, resulting in high power consumption. It had drawbacks.

[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 wear resistance and low power consumption.

[Summary of the invention]

In order to achieve such an object, the present invention forms a coating made of nitride of one or more metals selected from the group of titanium, tantalum, chromium, and zirconium on the surface of the inner cutter. It is characterized by:

The thickness of the coating is preferably about 0.1 to 10 μm, more preferably 0.5 to 5 μm. In other words, if the film thickness becomes thinner than about 0.1 μm, there is a problem in terms of wear resistance.
On the other hand, if the film thickness is greater than about 10 μm, the cutting edge becomes rounded and requires re-sharpening, which is not preferable. Therefore, it is preferable to limit the thickness of the coating to a range of approximately 0.1 to 10 μm.

[Embodiments of the invention]

Next, examples of the present invention will be described.

Example 1 The figure is a schematic diagram of a high frequency sputtering apparatus used in an example of the present invention. In the figure, 1 is an inner cutter for surface treatment, 2 is an inner cutter holder, 3 is a target, 4 is a high frequency power source, 5 is argon gas, 6 is nitrogen gas, and 7 is a metal pellet.

A predetermined number of inner cutters 1 are held in the inner cutter holder 2, a titanium pellet 7 is placed on the target 3, and after the chamber is depressurized by suction, argon gas 5 and nitrogen gas 6 are
is fed at various gas pressure ratios to bring the total gas pressure in the room to 5
Set to 10 Torr. Then, while rotating the inner cutter holder 2, titanium is sputtered with a high frequency power of 500 W to form a sputtered film with a thickness of 1 μm on the surface of the inner cutter 20.

Example 2 A zirconium nitride film with a thickness of 1 μm was sputtered on the surface of the inner cutter 2 in the same manner as in Example 1, using a zirconium metal pellet 7 and setting the mixed gas pressure ratio of argon gas and nitrogen gas to 1:1. Form a film.

Example 3 Sputtering of tantalum nitride with a thickness of 1 μm was applied to the surface of the inner cutter 2 in the same manner as in Example 1 using a tantalum metal pellet 7 and setting the mixed gas pressure ratio of argon gas and nitrogen gas to 1:1. Form a film.

Example 4 A sputtering coating of chromium nitride with a thickness of 1 μm was formed on the surface of the inner cutter 20 in the same manner as in Example 1, using a chromium metal pellet 7 and setting the mixed gas pressure ratio of argon gas and nitrogen gas to 1:1. to form.

Comparative Example A product made of the same material as the first example, but without a sputtering coating formed on the surface.

〔Effect of the invention〕

Rotary electric shavers were assembled using these inner cutters under controlled conditions, and the driving current values of each electric shaver were measured. The results are shown in the following table.

Table The present invention has the above-mentioned configuration, and as is clear from the table above, the inner cutter with the nitride films of titanium, tantalum, chromium, and zirconium formed thereon has a nitride film formed thereon. The driving current value of the electric shaver is smaller than that of the electric shaver without the zirconium nitride coating as in Example 2.

Those that formed a film are remarkable. This indicates that the friction coefficient of the inner cutter relative to the outer cutter is small, the sliding load is low, and the power consumption is low. Further, by forming the nitride film, it is possible to provide an electric shaver that has excellent wear resistance, is chemically stable, and does not discolor due to artificial juice.

In the above embodiments, the nitride film was formed by high frequency sputtering, but the film may also be formed by other methods such as magnetron high frequency sputtering, ion plating, plasma CVD, and CVD.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram of a high frequency sputtering apparatus used in an embodiment of the present invention. 1...Inner blade, 2...Inner blade holder, 3
...Target, 4...High frequency power supply,
5... Argon gas, 6... Crab gas, 7... Metal pellet.

Claims (1)

[Claims] (1) An electric shaver characterized by having an inner cutter whose surface is coated with a coating made of a nitride of at least one metal selected from the group of titanium, tantalum, chromium, and zirconium. (2. An electric shaver as set forth in claim (1), wherein the thickness of the coating is regulated within a range of about 0.1 to 10 μm.