JPS60162766A - Electric razor - Google Patents

Abstract

PURPOSE:To reduce the quantity of power consumed by an electric razor by forming a dense nitride film on the surface of the outer blade formed by electroforming or other method to improve the durability and to reduce the sliding load. CONSTITUTION:The outer blade of an electric razor is made of Ni or stainless steel by electroforming or other method, and a dense nitride film is formed on the surface of the outer blade by plasma nitriding or other method. A rotary electric razor is assembled using the outer blade. The electric razor has characteristics such as superior durability and small sliding load.

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 relates to the structure of an outer cutter thereof.

[1r view of the invention] Conventional electric razor outer blades are made of nickel or stainless steel w4
Because it was made from materials such as, if used for a long period of time, it would 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 large 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,
We offer an electric shaver that is durable and has a low sliding load.

[Summary of the invention]

In order to achieve this object, the present invention is characterized by forming a dense nitride group on the next surface of the outer cutter by, for example, plasma nitriding.

As a method for forming a dense nitride film, a plasma nitriding method in which the outer blade is exposed to plasma in a nitrogen gas atmosphere, or a method in which a negative voltage is applied using the outer blade as an electrode in a nitrogen gas atmosphere is suitable. .

As another nitriding method, the outer blade is
There is a method of heating to a high temperature of about 00°C. However, if the outer blade is made of electric Th blade such as nickel,
This is not desirable because the sulfur and other additives that are taken into the blade during the nitriding process are diffused during the nitriding process and adversely affect the physical properties.

This is the result of a very interesting experience in the plasma capping method.

The system gas pressure is preferably in the range of about 1XIO to 1 Torr, and preferably in the range of about 3 A range of -300 to -700v is suitable.

Furthermore, there is no need to heat the material during the molting process, and heating can increase the snow oxidation rate and shorten the processing time.

[Embodiments of the invention]

Next, examples of the present invention will be described.

Example 1 The figure is a schematic configuration diagram of a plasma nitriding apparatus used in Example 1. 1 in the figure is the outer blade to be electrified, and the negative electrode is missing. 2 is 1) C'fjt, and 3 is nitrogen gas.

4 is an exhaust gas, and 5 is a processing container which also serves as a positive electrode and faces the outer blade l.

Outer blades 1 made of Nickel N electroformed blades are installed at different positions inside the processing vessel 5, and after the inside is brought into a depressurized state by the exhaust 4, the rod gas 3 is fed to 0.1 Torr, and the outside is heated. blade l
400μ was applied to the plasma, and the duration of treatment in the generated plasma was changed (1 minute, 3 minutes).

The outer cutter 1 was electrified for 10 minutes and 20 minutes. Example 2 Using stainless steel outer blade l, nitrogen gas pressure 0, ITo
rr, the applied voltage was -400■, and nitriding was performed for 10 minutes using the same plasma nitriding apparatus as in Example 1. Comparative Example 1 A capping film was formed using the same nickel N electroforming blade as in Example 1. No outer blade.

Comparative Example 2 An outer cutter made of the same stainless steel as in Example 2 and without a nitrided layer.

〔Effect of the invention〕

These outer blades were immersed in artificial sweat wash, and the number of days until the outer blades changed color was determined. The results are shown in Table 1K below.

Table 1 In addition, among the outer blades of the above examples and comparative examples, rotary electric shavers with the same specifications were assembled using the outer blades that were not subjected to the above-mentioned discoloration test, and their driving currents were measured. The measured results are shown in Table 2 below.Table 2 As mentioned above, the present invention improves the durability of the outer cutter and reduces the sliding load by forming a dense nitrided layer on the surface of the outer cutter. An electric shaver that uses less force can be provided.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram of a plasma nitriding apparatus used in an embodiment of the present invention. l... Outer blade, 2... DC power supply, 3...
...Nitrogen gas. 4... Exhaust, 5... Processing container.

Claims (1)

[Claims] (1) An electric shaver characterized by having an outer cutter having a dense nitride group formed on its surface. Q) An electric shaver according to claim (i), characterized in that the nitride group is formed by plasma nitriding. (3) Permissible Claims In paragraph (1) or (2) of the claim (1), it is stated that the outer cutter is an electroformed blade.
An electric razor.