JPS641769B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose of the Invention (Field of Industrial Application) The present invention is directed to the manufacture of a temple for glasses in which a coil spring is interposed in the middle in order to provide the temple with ideal flexibility. It is about law.

(Prior art) As is well known, when putting on and taking off glasses, the left and right temples must be bent outward, so it is preferable that the glasses be highly flexible, but in order to hold the glasses, it is necessary to squeeze the side of the head. Moreover, it must also have elasticity. Therefore, glasses are made of flexible elastic material as a whole.
For example, they are made of metal or plastic, and are designed to provide flexibility not only to the temples but also to the bridge portion of the frame, thereby making it easier to flex the temples when putting on and taking off glasses.

However, if bending stress is repeatedly applied to the eyeglass frame, it will gradually distort and deform the frame, disrupting the opposing relationship between the pupil and the optical axis of the lens, or causing the temples to open slightly outward, deteriorating the ability to hold the eyeglasses. or

(Problem to be solved) Therefore, when putting on and taking off the glasses, the temples themselves can be easily bent outward without applying bending stress to the frame itself, and the temples can also be used to hold the glasses on the cephalic side. It is desired to provide a temple having elasticity that can pinch the parts. A temple with both of these functions could be constructed with a coil spring interposed in the middle, but glasses are a type of jewelry and need to be finished to look as beautiful as possible. Therefore,
A Ni-Cu-Zn-based alloy known as nickel silver is used as the material;
The base alloy has poor plastic workability, making it difficult to integrally manufacture a long, shape-changing temple with the protrusions necessary to relay the coil spring. Under these circumstances, a compromise measure was taken, such as cutting a short circular bar A with protrusions as shown in Figure 3, and fitting a long slender bar B to the other end. If this happens, there will be a problem in the bending resistance of the joint, and a problem will arise in the joint strength at that part.

Furthermore, although it is necessary to weld the coil spring S and the temple A, the coil spring S is annealed by the welding heat, causing problems such as deterioration of elasticity.

Therefore, it is desired to provide a method suitable for manufacturing a temple with a coil spring interposed in the middle, which overcomes the above-mentioned manufacturing process difficulties.

(2) Structure of the invention (means for solving the problem) Therefore, in the present invention, 10 to 20% Ni - 50 to 70%
A Cu-remaining Zn-based alloy rod is swaged, and the end to which the temple end 4 is attached is cylindrical, and a long temple body 1 with a shape change is formed as one piece, and a fitting protrusion is formed on the end surface of the cylindrical part 12. 11, a coil spring 2 having a predetermined bending elasticity limit was made of Ni-Cr stainless steel,
The end protrusion 11 is fitted into the end hole 21 of the inner cylindrical portion of the coil spring 2, and silver soldered at a temperature below the annealing temperature of the coil spring (for example, 650° C.) to provide flexibility with the desired bending elasticity limit. This led to the manufacture of temples.

(Example) The temple material was made of Ni-10-20% Cu, balance Zn, 50-70% Cu, so as to have a glossy appearance.
A Cu-Zn based alloy rod is preferred. Especially, Ni12.5～
15.5; Cu59.0~65.0; Mu0.5 or less; The remaining Zn range is swaged to form the cylindrical part 1 shown in Figure 1.
2. Suitable for having an insertion part 14 that fits into the flat part 13 and the temple end 4.

The fitting protrusion 11 may be formed on the end surface of the cylindrical portion by cutting, or a fitting hole may be formed in the end surface and the protrusion 11 may be driven into and caulked.

The coil spring 2 has an outer diameter corresponding to the outer diameter of the cylindrical portion 12 of the temple body 1, and is formed with a fitting hole 21 into which the end protrusion 11 is fitted. The material should have a bending elasticity limit that provides flexibility to the temple without impairing the elasticity that compresses the head side, and it is preferable to use Ni-Cr stainless steel, such as SUS304H.

When connecting the temple body 1 and the coil spring 2, it is preferable to fit the end protrusion 11 into the fitting hole 21 at the cylindrical end of the coil spring 2 and secure it with silver solder. When silver solder is used, approx.
This is because sufficient adhesion can be achieved at 650°C, and not only does it not give an annealing effect to the coil spring 2, but both contain Ni components and can provide a high degree of adhesion.

Coil spring 2 connected to temple body 1
At the other end, the end surface protrusion 31 of the joint member 3 to which the frame F is jointed is fitted into the coil spring 2 and soldered with silver in the same manner as above, and on the other hand, the temple end 4 is attached to the temple body 1 to form the temple T. .

(a) Effects of the invention According to the present invention, 10~20%Ni−50~70%Cu−
Since the remaining Zn-based alloy is used for swaging processing, it is possible to manufacture long temples with varying shapes using a highly decorative metal, and even if a coil spring is inserted, there is no loss of bending resistance in the joint. It is possible to provide a flexible temple that does not bend, is strong, and is rich in design.

In addition, the coil spring is made of Ni-Cr stainless steel wire with a predetermined bending elasticity limit, and can be firmly welded with silver brazing at a temperature that does not cause annealing, so the flexibility of the temple is not impaired. Never.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view for explaining the flexible temple manufacturing method according to the present invention, and FIG. 2 is a perspective view showing the flexible temple of FIG. 1 pivoted to the end L of the frame F. FIG. 3 is an exploded perspective view showing another example of manufacturing a flexible temple. 1...Temple body, 2...Coil spring.

Claims (1)

[Scope of Claims] 1 Using a 10-20% Ni-50-70% Cu-balance Zn-based alloy material, a temple body 1 whose ends are cylindrical and whose shape changes is integrally formed by swaging processing. death,
A protrusion 11 is formed on the end surface of the cylindrical portion 12, and a coil spring 2 having a predetermined bending elasticity limit and the same outer diameter as the cylindrical portion 12 is made of Ni-Cr stainless steel wire. Fitting hole 21 at the end of the inner cylinder
A method for manufacturing a flexible temple, characterized in that the protrusion 11 is fitted into the inner part and silver brazed at a temperature below the annealing temperature of the coil spring 2.