JPH0756537B2 - Eyeglass frame made of superelastic alloy for easy bending adjustment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle frame using a superelastic alloy, which can be easily adjusted by inserting an adjusting pipe into a portion requiring bending adjustment.

[0002]

2. Description of the Related Art Ni.Ti-based alloys and Cu.Zn.Al-based alloys have shape memory characteristics and superelasticity characteristics, and are put to practical use in various fields by taking advantage of these characteristics. The application to eyeglass frames is also in progress, and superelastic alloys are used for various eyeglass parts such as brace bars, bridges, end pieces, and ear hook temples. For example, if a Ni / Ti superelastic alloy is used for the ear hanging temple, the springiness of the ear hanging temple is remarkably improved, and even if a little unreasonable force is applied to it, it can easily be deformed and the frame It can also prevent the shape from breaking. In addition, the lightness and corrosion resistance of the eyeglass frame are improved, and the superelastic alloy has a great effect.

However, such a superelastic alloy has a problem in workability and has remarkable elasticity, so that it is not easy to bend it manually. For this reason, it has been extremely difficult to finely adjust each part of the spectacle frame performed at a retail store for a better wearing feeling. In order to apply a force that exceeds the high elastic limit of a superelastic alloy, it is necessary to deeply bend the portion to be adjusted, which requires a considerable technique, and delicate adjustment is almost impossible. In the case of adjusting the bending of the modern part of the ear hook temple, there was a situation in which the synthetic resin modern was damaged.

[0004]

The present invention has been made in view of the above problems in the eyeglass frame using a conventional superelastic alloy, and has superelastic characteristics,
It is a technical object to provide an eyeglass frame that can be manually bent.

[0005]

Means adopted for solving the problems Means adopted by the inventor for solving the above technical problems are as follows. That is, the present invention, in an eyeglass frame composed of eyeglass parts at least a part of which is made of a superelastic alloy, is plastically deformed to a predetermined portion of the eyeglass part, and its elastic limit is recovered by the elasticity of the eyeglass part. The point is that the bending adjustment can be easily performed by adopting the technical means of inserting an adjustment pipe that is larger than the force and can suppress the shape recovery due to the elasticity of the eyeglass component.

[0006]

EXAMPLES The present invention will be described below based on examples.
1 is a partial perspective view of a spectacle frame which is an embodiment of the present invention, and FIG. 2 is an enlarged explanatory view of a main part of an ear hook temple of the spectacle frame which is an embodiment of the present invention.

In the figure, what is indicated by reference numeral 11 is an ear hook temple which is made of a Ni / Ti superelastic alloy and is axially attached to the end piece 12, and the other end is thin, and the temple core 11a (diameter 1.2 mm). The number 2 indicates the aluminum adjustment pipe (outer diameter 1.6
mm, inner diameter slightly over 1.2 mm), and is inserted into the temple core 11a. These temple core 11a and adjusting pipe 2
Both are further coated with synthetic resin, and modern 3
Is formed. In addition, in FIG. 1, the modern 3 is shown by a dotted line.

The adjusting pipe 2 described above is plastically deformed, and its elastic limit is larger than the force recovered by the elasticity of the temple core 11a. For this reason, when the temple core 11a is bent together with the adjusting pipe 2, the temple core 11a itself tries to recover to the shape before bending due to the superelasticity. Since the shape recovery due to the elasticity of the core 11a is suppressed, the deformation of the bent portion is maintained. Therefore, the bending of the modern part of the ear hook temple 11 can be adjusted.

The term "elasticity limit" as used herein means the maximum force at which an object is completely elastic when a force is applied to the object. Temporarily, adjustment pipe 2
If the elastic limit of is smaller than the force that is recovered by the elasticity of the temple core 11a, the adjusting pipe 2 is plastically deformed by the shape recovery force of the temple core 11a, and the bending deformation is not maintained.

In FIG. 2, what is indicated by reference numeral 11b is a knurled knurled portion engraved at the end of the temple core 11a, which is applied to the knurled portion 11b of the inserted adjustment pipe 2. By pressing the part, it serves to prevent the adjusting pipe 2 from rotating and coming off.

The embodiment which is a specific example of the present invention is constructed as described above, but the present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the scope of the claims. It is possible to change, for example, by changing the thickness of the adjusting pipe, the elastic limit can be adjusted, of course, by changing the cross-sectional shape of the adjusting pipe and the temple core, The elasticity limit may have directionality.

[0012]

As described above in the embodiments, the eyeglass frame of the present invention has superelastic characteristics, but can be manually bent at the adjustment site. It was difficult to adjust the bending of the spectacle frame at the retail store, which was difficult, and the comfort of wearing the spectacle frame was improved.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an eyeglass frame that is an embodiment of the present invention.

FIG. 2 is an enlarged explanatory view of a main part of an ear hook temple of an eyeglass frame according to an embodiment of the present invention.

[Explanation of symbols]

 1 Eyeglass parts 11 Ear hanging temple 2 Adjustment pipe 3 Modern

Claims (2)

[Claims] 1. An eyeglass frame composed of an eyeglass component 1 at least a part of which is made of a superelastic alloy, wherein a predetermined portion of the eyeglass component 1 is plastically deformed and its elastic limit is equal to that of the eyeglass component 1. A spectacle frame made of a superelastic alloy, which is easy to bend and adjusts, and is fitted with an adjustment pipe 2 which is larger than the force to be restored by elasticity and which can suppress the shape recovery due to the elasticity of the spectacle component 1. . 2. The eyeglass component 1 is an ear hook temple 11 formed by molding a superelastic alloy, and an adjustment pipe 2 is inserted into a portion of the ear hook temple 11 where the modern 3 is covered. A spectacle frame made of a superelastic alloy according to claim 1, wherein bending adjustment is easy.