JPH0627422A - Method for joining spectacle frame and spectacle frame member - Google Patents

Abstract

PURPOSE:To enable the production of the more excellent spectacle frame at a lower cost by using materials most suitable for the respective members constituting the spectacle frame by providing a simple technical means for joining non-titanium metals to each other or the non-titanium metal and a titanium metal by welding or brazing relating to the spectacle frame made of metal and the process for production of this frame. CONSTITUTION:The surface layer 6 consisting of the titanium metal is formed on the surface of a base metal 5 consisting of the non-titanium metal by subjecting the base material to vacuum vapor deposition, sputtering, ion plating or electroplating and thereafter, the member 4 consisting of the non-titanium metal as a base material and the member 1 made of the titanium metal are joined by welding or brazing means. One of the preferable structures of the spectacle frame is constituted by forming a braze 1 of the titanium metal, forming the surface layer 6 of the titanium metal on a rim 4 formed of the non-titanium metal and joining the braze 1 and the rim 4 to each other by welding or brazing, thereby forming the front of the spectacle frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle frame made of metal and a method of joining members to each other during its manufacture.

[0002]

2. Description of the Related Art A metallic spectacle frame is formed by joining a plurality of members such as a brace, a rim, a bridge, a tip, and a temple by welding or brazing to integrate them.

Examples of materials for metal eyeglass frames include titanium and titanium alloys (hereinafter referred to as "titanium-based metals"), high nickel alloys, nickel base alloys, cobalt-containing alloys, and cobalt. Base alloys, copper base alloys, beryllium copper, stainless steel, superelastic alloys, β alloys, shape memory alloys and the like (hereinafter referred to as “non-titanium-based metal”) are used.

Of these, titanium-based metals are preferred because they are light, have high strength and do not rust, and are therefore used as a material for metal eyeglass frames. It can be said that the welding and brazing of titanium-based metals are technically established.

[0005]

On the other hand, as a drawback of the titanium-based metal, there is a drawback that the metal particles tend to become coarse and brittle due to heat. In the spectacle frame, this problem is likely to occur at the joint portion of the rim, and the metal particles at the joint portion of the rim are coarsened due to the heat at the time of joining, so that the rim is likely to be broken.

As one method for avoiding this problem, it is conceivable to form the rim with a non-titanium-based metal, but it is technically difficult to join the non-titanium-based metal and the titanium-based metal by welding or brazing. .

[0007] On the other hand, nickel alloys and high nickel alloys are suitable as materials for rims, but may cause allergies and therefore have a problem in being used as materials for eyeglass frames. Therefore, in such a case, it would be convenient if the metal spectacle frame could be manufactured by a uniform means even if non-titanium-based metals are not caused.

Therefore, the present invention provides a member for forming a spectacle frame by providing a simple technical means for joining non-titanium-based metals to each other, or joining non-titanium-based metals and titanium-based metals by welding or brazing. Mixing titanium-based metals and non-titanium-based metals, and in some cases mixed non-titanium-based metals such as nickel alloys and nickel silver, and using the most suitable materials for each member to create a better eyeglass frame. The challenge is to make it cheaper to manufacture.

[0009]

The method of the present invention for joining a non-titanium-based metal forming an eyeglass frame and a titanium-based metal is performed by vacuum deposition, sputtering, or ion plating on a non-titanium-based metal base material 5. Or, after electroplating to form a surface layer 6 of titanium-based metal on the surface, a member 4 having a non-titanium-based metal as a base material and a member 1 made of titanium-based metal are welded or brazed to the titanium-based metal. It is to join by.

One preferable structure of the spectacle frame manufactured by using the method of the present invention is that the brace 1 is made of titanium-based metal and the rim 4 made of non-titanium-based metal is vacuum-deposited, sputtered, or ion-plated. The surface layer 6 of titanium-based metal is formed by means such as coating or electrolytic plating, and the brace 1 and the rim 4 are joined together by welding or brazing to form the front of the spectacle frame.

Further, the method of the present invention for joining the non-titanium-based metals forming the eyeglass frame to each other is such that the non-titanium-based metal base material 5 of the members 1 and 4 to be joined together is vacuum-deposited, sputtered, or ion-plated. After the surface layer 6 of titanium-based metal is formed on the surface by plating or electrolytic plating, both members 1 and 4 are joined by welding or brazing means to the titanium-based metal.

[0012]

The technique for forming the surface layer 6 of the titanium-based metal on the non-titanium-based metal by vacuum vapor deposition and the technique for welding or brazing the titanium-based metals to each other have been established. The members 1 and 4 made of a non-titanium-based metal, or the member 4 having the base material 5 made of a non-titanium-based metal and the member 1 made of a titanium-based metal can be joined together without any technical difficulty.

A rim 4 having a non-titanium-based metal as a base material
The spectacle frame in which the above-described method is joined to the titanium-based metal brace 1 does not have a risk of lowering the strength of the joined portion, prevents rim breakage, and has a thick brace 1 with a wire rod.
Since titanium-based metal is used, the overall weight can be reduced.

Further, nickel alloys and high nickel alloys are
Since it may cause allergies, there is a problem in using it as a material for eyeglass frames, but according to the present invention,
Even if a nickel alloy or a high nickel alloy is used as the base material, the surface thereof is covered with the titanium-based metal surface layer 6, so that the problem of nickel allergy can be avoided.

[0015]

1 shows an eyeglass frame of the present invention manufactured by the method of the present invention. The brace 1 is made of titanium, and the bridge 2 and the tip 3 made of titanium are joined. The rim 4 is manufactured by bending a nickel alloy wire 5.
After forming a titanium plating layer 6 on the surface by titanium plating, it is joined to the brace 1 by a brazing material 7. The temple 8 is made of titanium-based metal.

FIG. 2 shows a bridge 1 in the spectacle frame of FIG.
FIG. 3 is an enlarged cross-sectional view schematically showing the joint between the rim 4 and the rim 4, and a titanium plating layer 6 is formed on the surface of the nickel alloy base material 5 of the rim 4, and the plating layer 6 and the surface of the titanium brace 1 are The rim 4 and the brace 1 are joined by brazing with the brazing material 7.

FIG. 3 is an enlarged sectional view schematically showing the joint portion between the bridge 1 and the rim 4 in the eyeglass frame which is manufactured by the method of the present invention using both the bridge 1 and the rim 4 as a base material of nickel alloy. , A titanium plating layer 6 is formed on the surface of the nickel alloy base material 5 of the brace 1 and the rim 4,
The rim 4 and the brace 1 are joined by brazing the plated layers 6 to each other with the brazing material 7.

[0018]

According to the present invention described above, a spectacle frame is manufactured by joining a member made of a titanium-based metal and a member whose base material is a non-titanium-based metal by a technically stable means. In addition, since the base material is a non-titanium-based metal, it can be joined to each other in the same way, so it is possible to use the same method for each member without being affected by problems such as allergy and corrosion of non-titanium-based metals. The spectacle frame can be manufactured using a suitable material in a technically stable and uniform manner. In particular, the spectacle frame of the present invention in which the base material of the rim is a nickel-based metal has an effect that there is no problem of rim breakage or allergy due to the nickel-based metal, and a light and strong spectacle frame can be obtained. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of eyeglass frames.

FIG. 2 is a schematic cross-sectional view of a joint between a non-titanium-based metal member and a titanium-based metal member.

FIG. 3 is a schematic cross-sectional view of a joint between non-titanium-based metal members.

[Explanation of symbols]

 1 Brace 4 Rim 5 Nickel alloy wire 6 Titanium plating layer 7 Brazing material

Claims (3)

[Claims] 1. A brace (1) made of a titanium-based metal and a rim (4) whose base material (5) is a non-titanium-based metal, the rim (4) being provided on the surface of the base material (5). This braces (1) have a titanium metal surface layer (6) formed by vacuum deposition, sputtering, ion plating or electrolytic plating.
Spectacle frame, characterized in that the rim and the rim (4) are welded or brazed together. 2. A method of joining members (1) and (4) constituting an eyeglass frame by welding or brazing, wherein one of the members to be joined (1) is made of a titanium-based metal and the other is made of a non-metallic material. It is made of titanium-based metal, and non-titanium-based metal base material (5) is vacuum-deposited, sputtered, ion-plated or electroplated, and the surface of titanium-based metal (6)
After joining, the one member (1) and the other member (4) are joined by welding or brazing means to a titanium-based metal. 3. A non-titanium-based member constituting an eyeglass frame
(1), (4) In the method of joining each other by welding or brazing, the base materials (5) and (5) of both members are subjected to vacuum deposition, sputtering, ion plating or electrolytic plating, and titanium is applied to the surface. After forming the surface layer (6) of the base metal,
A method of joining spectacle frame members, characterized in that the two members (1) and (4) are joined by welding or brazing means to a titanium-based metal.