JPH0733975U - Metal Allergy-Countermeasures - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a decorative article having excellent appearance quality without using a metal that causes metal allergy. [Structure] Metal allergen-without using mercury, nickel, tin, cobalt, and chromium which are regarded as metals, a base material made of titanium or titanium alloy, a titanium titanium film or / and a gold film, and a hard carbon film The combination forms an ornament. [Effect] It is possible to provide a decorative article that does not cause metal allergies, does not worry about reappearance, and has excellent appearance quality.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a decorative article having a portion that directly contacts the human body, and more particularly to a countermeasure for metal allergy of the decorative article.

[0002]

[Prior art]

 Up until now, the beauty and rarity of the appearance have been the major criteria for ornaments, and the measures against metal allergy have not been considered at all. Therefore, there were no restrictions on the metals used.

[0003]

[Problems to be solved by the device]

 Currently, many of the metals used as ornaments include nickel, mercury, tin, and cobalt, which are considered to be the cause of metal allergies generated from contact dermatitis. Whether or not metal allergy is actually caused varies depending on factors such as the frequency of contact with the metal and the individual constitution, but at least for materials that are most likely to cause metal allergy, especially nickel. Is reported to be under regulatory movement. (Journal of the Japan Society of Watchmaking: No. 144, 1993 "Metal-resistant Allergi-About watch material")

An object of the present invention is to provide a decorative article which does not use a metal causing a metal allergy and which can satisfy the beautiful appearance.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, mercury, nickel, tin, cobalt, and chromium, which are ranked particularly high among the metals considered to be the cause of the above-mentioned metal allergy, are not used, and titanium or titanium The decorative article is constituted by a combination of a titanium alloy substrate and a titanium titanium film or / and a gold film and a hard carbon film. Further, by providing the intermediate layer on the base material, it is possible to further increase the adhesion between the base material and the hard carbon film.

[0006]

[Action]

 The anti-metal allergic effect of titanium has been clinically tested, and the antiallergic wristwatch (made by CITIZEN) was selected by the Japan Allergic Society on December 7th and 8th, 1991 at the Osaka Chamber of Commerce and Industry. (Titanium) was reported in the study of compatibility in patients with wrist dermatitis, and its safety has been fully confirmed. Furthermore, confirmation work is ongoing for titanium alloys, and the risk is considered to be low in medical fields because it is used for artificial bones. Regarding the correlation between the gold film and the allergy, although there is a young case of the disease, it can be said that the incidence is lower than that of the above metal allergy metal. Further, regarding the hard carbon film and the titanium dioxide film, there has been no problem at all, as it has been dealt with by taking into account the good biocompatibility.

By constructing a decorative article with a metal and a material that are less likely to cause these metal allergies, the metal allergy has a suppressing effect and can be continuously worn. Furthermore, the combination of a gold color expression with a titanium titanium film or a gold film and a black expression with a hard carbon film further enhances the value as an ornament.

[First Embodiment] A detailed description will be given below with reference to the drawings. FIG. 1 is a schematic view showing a semi-ring type piercing which is a decorative item. It consists of a ring 11 and a shaft 12, and after the shaft 12 is passed through the ear, it is held by being hooked on the end of the ring. This time, a ring 11 made of titanium material was coated with a gold film by a physical vapor deposition method (PVD method), and a shaft 12 made of titanium material was coated with a hard carbon film by a DC-plasma CVD method. By combining 11 and the shaft 12, a gold / black toon piercing was obtained. From this, it is possible to achieve both decorativeness and countermeasures against metal allergies by using a metal / material that has a low risk of causing metal allergy at least in the parts that may come into contact with the skin or the parts that may come into contact with the skin. Was done.

Example 2 FIG. 2 is a schematic view showing spectacles as a decorative item. The temple 21 made of titanium alloy, the frame 22 and the lens 23 constitute a main part. Here, 22 parts of the frame were coated with a titanium dioxide film by the PVD method, and 21 parts of the temple were coated with a hard carbon film by the DC-plasma CVD method.

Example 3 FIG. 3 is a schematic view showing a wristwatch which is a decorative item. The case 31 and the band 32 made of a titanium material were coated with a titanium titanium film by the PVD method, and then the titanium titanium film was coated with a gold film to have a total thickness of 1 to 2 μm. On the other hand, the crown 33 made of titanium, the push button 34, and the back cover (not shown) were covered with a hard carbon film having a thickness of 1 micron by the DC-plasma CVD method via an intermediate layer. . At this time, an intermediate layer made of a Si film having a film thickness of about 0.1 μm was formed on the base material by a sputtering method. In general, by inserting an intermediate layer so that a Ti film is in contact with the underlying base material and a Si film is in contact with the hard carbon film side, the adhesion strength between the base material and the hard carbon film is greatly increased. However, it has been found that when the base material is made of titanium or a titanium alloy, a large adhesion strength is guaranteed without the Ti layer in the intermediate layer. The wristwatch constructed as described above has a good design with gold / black tones, and all parts that may come into contact with the skin are made of metal anti-allergic materials. -No symptoms are expected.

Although the type of the coating film is changed for each part in the above embodiment, it is possible to perform a process corresponding to a complicated pattern in the part by using a mask method or the like. For example, the center part of the band is gold, and the peripheral part is black. Although the DC-plasma CVD method was used as the method for forming the hard carbon film, the method is not limited to this and various methods such as the RF method and the ECR method can be applied. Further, as an intermediate layer when the intermediate layer is inserted on the substrate to form the hard carbon film, other than the above, a carburized layer containing carbide on the surface of the substrate by carburizing treatment, or IVa, Va Carbides of group metals are used. Furthermore, the present invention is effective for ornaments such as rings, bracelets, fasteners, buttons, etc. that may come into contact with the skin in addition to the above-mentioned embodiments.

[0012]

[Effect of device]

 As described above, according to the present invention, it is possible to provide a decorative article which is free from the concern of metal allergy and has excellent appearance quality.

[Brief description of drawings]

FIG. 1 is a schematic view of piercings showing an embodiment of the present invention.

FIG. 2 is a schematic view of eyeglasses showing another embodiment of the present invention.

FIG. 3 is a schematic view of a wrist watch showing still another embodiment of the present invention.

[Explanation of symbols]

 11 ring 12 axis 21 temple 22 frame 23 lens 31 case 32 band 33 crown 34 push button

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideaki Yamagata 6-12 Hommachi, Tanashi City, Tokyo Citizen Watch Co., Ltd. Tanashi Factory (72) Inventor Yukio Miyako Tokorozawa, Saitama Prefecture 840 Takeno Citizen Watch Co., Ltd. Technical Research Institute (72) Takanori Minatani, Tokorozawa, Saitama Pref. Shimotomi, Takeno 840 Citizen Watch Co., Ltd. Technical Research Institute

Claims (6)

[Scope of utility model registration request] 1. A decorative article having a base material made of titanium or a titanium alloy and having a portion which is in direct contact with a human body,
The decorative article is a metallic allergic countermeasure decorative article, wherein at least a part of the surface is covered with a hard carbon film. 2. A metal allergic countermeasure ornamental article according to claim 1, wherein the surface of the ornamental article is covered with a ticker titanium film or / and a gold film and a hard carbon film in a tongue. . 3. The metal allergic countermeasure decorative article according to claim 1 or 2, wherein a hard carbon film is coated on the surface of the base material via an intermediate layer. 4. The metal allergy-resistant ornament according to claim 1, wherein the ornament is a wristwatch. 5. The metal anti-allergic ornament according to claim 1 or 2, wherein the ornament is a pierced earring. 6. The metal allergy-resistant ornament according to claim 1, wherein the ornament is eyeglasses.