JPH0318548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing eyeglasses, and more particularly, the present invention relates to a method for manufacturing eyeglasses, and more particularly, a method for manufacturing eyeglasses, and more specifically, a method for manufacturing eyeglasses by manufacturing a brooch that fits into the rim and holds a part of the temple. The present invention relates to a method of manufacturing eyeglasses for obtaining eyeglass frames by excision welding.

In recent years, methods of manufacturing eyeglass frames using metals containing titanium have become widespread. In particular, if the eyeglass frames are made of 100% titanium, composite titanium frames containing cladding materials are also suitable because they are even more lightweight, and the rigidity is further increased, making them comparable in strength to conventional eyeglasses. The reason for this is that it is several steps better than a frame.

By the way, as shown in FIG. 1, the eyeglass frame includes, for example, a temple 2, a brooch 4, a hinge 6,
It is composed of various parts such as the rim 8, and therefore, when assembling this eyeglass frame 10,
These various parts must be joined together. The rims 8, 8 that hold the spectacle lenses 12 and the brooches 4, 4 for attaching the temples 2, 2 are no exception to this. In this case, in the prior art, when joining various parts constituting the eyeglass frame 10,
Brazing methods have been adopted. Therefore,
When brazing eyeglass frames made of titanium, the heating temperature is raised to about 1000°C, and if this temperature is exceeded, the titanium itself will nitride and become brittle. Moreover, since this temperature is generally determined by the luminous color of the brazing material which changes depending on the heating temperature, it is difficult to control the temperature and the quality cannot be guaranteed. Moreover, brazing requires considerable skill, and furthermore, during brazing, the brazing filler metal 14 flows out into unnecessary areas and hardens, resulting in a disadvantage from an aesthetic point of view. (See Figure 2).

On the other hand, the rim 8 and the brooch 4 are joined to each other,
A part 2a of the temple 2 is attached by screwing a small-diameter bolt 16 into a screw hole drilled in the broach 4. The rim 8, broach 4, etc. are all made as small as possible. Therefore, attempts have been made to use resistance welding all at once to join these relatively small parts, but when attempting to join the broach and the rim together, an extremely large current is required. As a result, the surface of the welding base material is damaged, resulting in a disadvantage that it cannot be put to practical use.

The present invention has been made in order to overcome the various disadvantages mentioned above, and includes defining a groove in the broach for receiving the rim, further forming a protrusion in the groove, and forming a protrusion in the groove. melt it by passing a large current through it,
An object of the present invention is to provide a method for manufacturing eyeglasses in which a brooch and a rim are resistance welded.

To achieve the above object, the present invention provides an eyeglass frame including a rim for carrying an eyeglass lens and a brooch for attaching a temple to the rim, the brooch member defining a groove for fitting the rim, A protrusion is formed in the groove, and then an electrode is pressed against the broach member and the rim, and electricity is applied to the protrusion to melt the protrusion, thereby resistance welding the broach member and the rim. .

Next, preferred embodiments of the method for manufacturing eyeglasses according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 3, reference numeral 20 indicates the material of a brooch 22 for constructing an eyeglass frame. This brooch 22 is preferably made of pure titanium, ie, 100% titanium, and has a screw hole 24 previously drilled through it in its longitudinal direction. If one side 22a of the brooch 22 is curved to match the shape of the rim, which will be described later, an aesthetically pleasing effect can be obtained. Therefore, as shown in FIG. 4, the broach 22 formed in this manner is provided with a groove 26 as shown by chain lines in order to fit and weld the curved rim. A cutting tool 28 is preferably used to define the groove 26 (see FIG. 4), and by rotating the cutting tool 28, the groove 26 is formed in the side portion 22a. In this case, a V-groove notch 32 is defined in the tip 30 constituting the tip of the cutting tool 28, and the cutting tool 28 is continuously rotated at a high speed by a rotational drive source (not shown) to broach the tool. The side portion 22a of 22 is cut to define a groove portion 26. As a result, a linear protrusion 34 having the same curvature as the groove 26 is formed on the broach 22 by the cutting process (the fifth
(see figure).

After such a protrusion 34 is obtained, the rim 36 is
is fitted into the groove portion 26. As a result, the rim 36 constituting the eyeglass frame is formed by the linear protrusion 34.
It will be easily understood that this leads to line contact with the broach 22.

Therefore, in such a setting state, one electrode 38a is brought into contact with the broach 22, and the other electrode 38b is brought into contact with the rim 36. Next, when a predetermined current is passed from the one electrode 38a to the other electrode 38b, this current flows toward the rim 36 through the linear protrusion 34 formed on the broach 22. In this case, the linear protrusion 34 plays the role of a projection in projection welding, and this portion is intensively heated and melted, making it possible to easily weld the rim 36 and the broach 22. Become. In addition, in the figure, reference numeral 40 indicates a temple that is screwed onto the brooch 22.

According to the present invention, when defining the groove for attaching the rim to the broach as described above, the protrusion is simultaneously formed by the rotating bit, and the linear protrusion allows the rim and broach to be attached to each other. It is possible to integrate the two by projection welding. Therefore, unlike brazing, there is no need to control the temperature by checking the color of the heated brazing material, and excess brazing material generated during brazing leaks outside, which may later affect the aesthetic appearance of the eyeglass frame. There is no harm to it. Moreover, if the brooch and rim are made of the same titanium material, not only will accidents such as welding peeling off be avoided, but the finish will also be extremely beautiful, making it especially suitable for eyeglass frames. It is also possible for products that place emphasis on design to have an excellent appearance.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to the above-mentioned embodiments. Without,
Various improvements and improvements can be made without departing from the gist of the present invention, such as forming the process using different processes, and even making the protrusion in the groove bulge into a hemispherical shape to obtain the same effect. Of course, the design can be changed.

[Brief explanation of the drawing]

FIG. 1 is an overview perspective view showing a state in which an eyeglass frame and a lens attached to the eyeglass frame are combined;
FIG. 2 is a partially omitted perspective explanatory view of the joined state of the rim of an eyeglass frame and the brooch according to the prior art, FIG. 3 is a perspective view of the brooch before cutting according to the present invention, and FIG.
The figure is a perspective explanatory view of the state in which grooves and protrusions are formed on the broach shown in Figure 3 using a cutting tool, and Figure 5 is a perspective view of the broach shown in Figure 3.
FIG. 6 is an explanatory diagram showing the process of welding the broach and the rim by projec- tion welding according to the present invention, and FIG. It is an explanatory view of a state where a part of is screwed. 20... Material, 22... Brooch, 24... Screw hole, 26... Groove, 28... Bit, 30... Chip, 32... Notch, 34... Protrusion, 36...
...Rim, 38a, 38b...Electrode, 40...Temple.

Claims (1)

[Scope of Claims] 1. A spectacle frame including a rim for supporting a spectacle lens and a brooch for attaching a temple to the rim, the brooch member defining a groove for fitting the rim, and a protrusion in the groove. A method of manufacturing eyeglasses, comprising: forming an electrode on the broach member and the rim, applying electricity to the protrusion to melt the protrusion, thereby resistance welding the broach member and the rim. 2. In the method described in claim 1,
In the method of manufacturing eyeglasses, the groove and the protrusion are simultaneously formed by rotating a cutting tool that defines a recess corresponding to the protrusion. 3. A method for manufacturing eyeglasses according to claim 1 or 2, wherein the brooch and the rim are made of titanium.