JPH073377Y2 - Glasses frame that fingerprints are hard to wear - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a novel eyeglass frame in which fingerprints are hard to wear.

[Conventional technology]

Metal spectacle frames are popular because of their slenderness.

However, the metal materials used, such as nickel silver (copper nickel zinc alloy), copper alloy, nickel alloy, stainless steel, titanium, etc., have poor aesthetic appearance, poor corrosion resistance, or low surface hardness. Since it is easily scratched, it is common to form a (hard) decorative coating on the surface.

The most conventional materials for decorative coatings are precious metals such as gold, silver and platinum (all of which include alloys), and nickel,
Tin is also used. The initial method of forming the decorative coating is wet plating.

However, compared to wet plating, the film is thin and hard,
Ceramic-based compounds other than metals, such as yellow or brown titanium nitride (color changes depending on the film forming conditions, hereinafter abbreviated as TiN), blackish gray titanium carbide (hereinafter abbreviated as TiC), white to gray Chromium nitride (hereinafter,
Since a super-hard coating such as (abbreviation CrN) can also be formed, a method of forming by dry plating has recently been proposed and partially put into practical use.

[Problems to be solved by the device]

However, the coating formed by dry plating is
(1) Fingerprints are easily attached when touched with a finger and are difficult to remove even by wiping with a cloth. (2) There are problems that the color is dull and there is no gloss.

Therefore, the object of the present invention is to solve these problems.

[Means for Solving the Problems]

Therefore, the inventors of the present invention took an electron micrograph of the surface of the dry plating film in order to solve the above-mentioned problems, and observed that the film had a columnar crystal film structure, and the size of the columnar crystal was an average. Was about 0.5 to 5 μm, and there were many grain boundary gaps between them, and the width of the grain boundary gap reached to an average of about 0.1 μm.

As a result of further research, for example, when the coating is subjected to barrel polishing, the coating surface is crushed (the columnar crystals cause plastic deformation) and the grain boundary gap is filled, and the coating in this state is The inventors have found that they do not have the problems (1) and (2), and have completed the present invention.

Therefore, the present invention is "a spectacle frame having a dry-plated coating on the surface of a metal spectacle frame, in which the surface of the coating is crushed to fill the intergranular gaps, thereby preventing fingerprints from sticking" I will provide a.

[Action]

As described above, nickel metal, copper alloy, nickel alloy, stainless steel, aluminum, titanium (including alloy) or the like is used as the metal material constituting the base material of the eyeglass frame of the present invention.

The eyeglass frame (base material) made of these metal materials is
Precious metal or other plating may be applied in advance by wet plating.

As the dry plating film, as described above, (a) a decorative film of a noble metal such as gold (including alloys such as Au-Cr and Au-Pd), silver (including alloys), platinum (including alloys), etc. Or (b) For example, TiN that exhibits brown as described above, white or gray CrN, gray titanium carbide (hereinafter abbreviated as TiC),
White to charcoal-colored chromium nitride (abbreviated as CrC below)
An ultra-hard coating such as The dry plating film may also have a two-layer or multi-layer structure in which the decorative film of (a) is formed on the ultra-hard thin film of (b). In the case of a two-layer or multi-layer structure, either layer (mainly the uppermost layer) may be partially formed to show a pattern or pattern.

As a method of forming a dry plating film, for example, reactive or non-reactive vacuum deposition, ion plating,
Similarly, sputtering or the like is used.

Generally, a film thickness of 0.1 to 5 μm is sufficient.

Barrel polishing is generally used as a means for crushing the surface of the dry plating film to fill the grain boundary gap. Barrel polishing itself is known, and this is a barrel-shaped container called a barrel, in which the object to be polished, chips of walnut, corn, wood, plastic, bamboo, etc., alumina, corundum,
Abrasive grains such as emery are put together with oil or water to rotate or vibrate the barrel.

It is presumed that during this time, the coating film receives stress due to collision with chips and abrasive grains, and as a result, the columnar crystals cause plastic deformation and fill the grain boundary gap.

Further, a clear coat may be further applied on the dry plating film thus treated.

Hereinafter, the present invention will be described more specifically with reference to Examples.
The present invention is not limited to this.

[Example 1] A sputtering apparatus equipped with a cylindrical vacuum chamber having a diameter of 450 mm and a height of 300 mm was used as a target and had a purity of 99.9%.
The TiC sintered body was set, and the front 1 and temple 2 made of pure titanium were set as the substrate.

The inside of the vacuum chamber was once evacuated to 4 × 10 ⁻⁶ Torr., And then Ar gas was introduced at a flow rate of 280 cc / min.

Next, a high frequency of 800 W (13.56MH) was applied between the substrate and the target.
z) was applied to create a discharge state, and a black-grey type dry plating film 3 made of TiC having a thickness of 2 μm was formed on the surfaces of the front 1 and the temple 2.

Next, after assembling the spectacle frame by connecting this front and temple with a hinge screw, attach it to the jig,
It was put into a barrel polishing machine and polished for 6 hours.

The spectacle frame thus obtained did not have fingerprints even when touched with a finger, and even if a fingerprint was attached, it could be easily removed by wiping with a cloth.

In addition, the reflectance was improved by about 10%, and it was shiny and had a fearless black gray color, giving it a high-class feel. Even if scratched with steel wool, it was barely noticeable if slight.

In addition, the discoloration often seen in bad spots around the coating such as the armor and the back surface of the bridge was eliminated.

On the other hand, the non-polished ones had fingerprints on the surface when touched with a finger and could not be easily removed by wiping with a cloth.

In addition, the reflectance was low, there was no gloss, and it had a dull black gray color, and it felt cheap. When I scratched it with steel wool, it was noticeable even a little.

In addition, discoloration was observed at locations where the coating was poorly distributed, such as the armor and the back surface of the bridge.

Example 2 An electron beam heating type ion plating apparatus equipped with a cylindrical vacuum chamber having a diameter of 800 mm and a height of 800 mm was set with a 99.9% pure metal titanium block as a vapor deposition source, and the substrate was made of “pure titanium”. The front frame 1 and the temple 2 of No. 1 are connected with a hinge screw.

After evacuating the vacuum chamber to 2 × 10 ^-3 Torr., Ar gas was introduced to 5 × 10 ^-5 Torr.
Voltage is applied to clean the surface by discharge, and after evacuation, N ₂ gas is introduced to adjust the pressure to 5 × 10 ⁻³ Torr. In that state, Ti of the vapor deposition source is heated by the electron beam. Evaporated. Evaporated Ti atoms or ions react with N ₂ gas in plasma generated by thermoelectrons emitted from the filament of the ion plating apparatus to generate TiN. As a result, a yellow dry plating film 3 having a thickness of 2 μm was formed on the surface.

Next, this spectacle frame was attached to a jig and barrel-polished for 6 hours.

The spectacle frame thus obtained did not have fingerprints even when touched with a finger, and even if a fingerprint was attached, it could be easily removed by wiping with a cloth.

In addition, the frame had a shiny and dazzling golden color, and it felt high-class. Even if scratched with steel wool, it was barely noticeable if slight.

In addition, the discoloration often seen in areas where the coating does not adhere well such as the armor and the back surface of the bridge disappeared.

On the other hand, the non-polished ones had fingerprints on the surface when touched with a finger and could not be easily removed by wiping with a cloth.

In addition, it had a low reflectance, was not shiny, and had a dull golden color, and it felt cheap. When I scratched it with steel wool, it was noticeable, even slightly.

In addition, discoloration was observed at locations where the coating was poorly distributed, such as the armor and the back surface of the bridge.

[Example 3] A gold ingot having a purity of 99.9% was set as a vapor deposition source in a vacuum vapor deposition apparatus, and a front 1 or temple 2 made of pure titanium was used as a substrate.
Set.

After evacuating the vacuum chamber to 2 × 10 ^-5 Torr., Ar gas was introduced to 3 × 10 ^-3 Torr., Gold was evaporated by resistance heating, and the thickness of the front 1 or temple 2 surface was 1 μm. Gold-colored dry plating film 3 was formed.

Next, the front and temples were barrel-polished for 3 hours.

The front and temples of the present example obtained in this way had a shiny and bright golden color, and felt high-grade.
In addition, even if it was touched with a finger, there was no fingerprint, and even if there was a fingerprint, it could be easily removed by wiping with a cloth. Even if it was scratched, it was not noticeable.

On the other hand, the one that was not polished is not glossy,
It had a dull golden color and felt like a cheap thing. Further, when touched with a finger, a fingerprint was attached to the surface, which could not be easily removed by wiping with a cloth. When it got hurt, it stood out.

[Effect of device]

As described above, according to the present invention, (1) fingerprints are not easily attached even if touched with a finger, and even if they are attached, they can be easily removed by wiping with a cloth, and (2) gloss and color It is possible to obtain a spectacle frame with a dry plating film, which has a vivid and high-class feeling, (3) no local discoloration, and (4) which is inconspicuous even when scratched.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a front part which is a part of an eyeglass frame according to a first embodiment of the present invention. [Explanation of symbols of main parts] 1 ... Front 3 ... Dry plating film

Claims (1)

[Scope of utility model registration request] 1. A spectacle frame comprising a metal spectacle frame coated with a dry plating film on the surface thereof, wherein the surface of the coating film is crushed to fill the intergranular spaces, thereby preventing fingerprints from sticking.