JPS6141051Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to improving the temple part of an eyeglass frame in which the ear hook part has a rope structure, and specifies the layer structure and material of the core material and the winding material that is wound and laminated around the core material. By doing so, it is possible to reduce the weight and improve corrosion resistance, as well as ensure the plasticity of the rope and prevent it from loosening.

In general, this type of eyeglass frame is widely required not only for its use as a medical vision corrector, but also for its functionality.In particular, it is required to stably hold the rim portion on which the lens is attached in a predetermined position on the face. It is necessary to make various improvements to the material and shape of the temple portion so as not to cause discomfort or fatigue to the human body when worn or when used for a long period of time.

Therefore, it is well known that in conventional eyeglass frames, the ear hook portions forming the temple portions are formed into a rope structure with excellent flexibility to improve wearability.

However, in such conventional structures, the core material of the rope that forms the ear hook is made of nickel silver or stainless steel, and the surface is coated with Ni plating or
Because it has a structure that is made of a rolled and covered skin material made of crimp-bonded Cr alloy, the ear hooks are heavy.
Not only is it less comfortable to wear, but due to the structure of the rope, sweat can easily penetrate into the core, and depending on the metal material used, corrosion resistance is poor. There were various drawbacks, such as the need for a lubricant due to friction between the core material and the winding material.

This invention is aimed at solving the above-mentioned conventional drawbacks, and will be explained below based on the illustrated embodiment.

As shown in FIG. 1, numeral 1 in the figure is a metal eyeglass frame according to this invention. The eyeglass frame 1 is composed of a rim portion 2 on which a lens L is attached, and a pair of left and right temple portions 5 that are foldably connected to the rim portion 2 via a mounting piece portion 3 and a hinge 4. , the temple portion 5 consists of a temple portion 6 and an ear hook portion 7, and the ear hook portion 7 has a rope structure to be described later.

That is, the ear hook part 7 of the temple part 5 is
As shown in the figure, a core material 8 made of a clad material made of Ti as a base metal and Ni as a coating metal (hereinafter referred to as Ti/Ni clad material) is surrounded by a first winding made of Ti or a Ti-based alloy. Wire material 9 is wound and laminated, and a second winding material 1 made of Ni-Cr alloy is placed on the outermost surface of the wire material 9.
0 is wound and laminated, and then a plating layer 11 of Au or Rh is applied to the entire surface.

By the way, in order to manufacture the wire rod constituting the ear hook part 7 described above, as illustrated in FIGS. After forming the first winding layer by winding four wires of 9 at a time clockwise, the surface is reduced to a diameter of 0.86 mm by swaging or the like. Next, a second winding layer is formed by further winding the Ti wire 9 in a left-handed manner using a similar winding means to form a second winding layer of 1.35
After reducing the diameter to mm, 0.36mm made of Ni-Cr alloy
A wire rod 10 with a diameter of
It is obtained by applying Au plating.

In the above example, the wire rod itself made of Ni-Cr alloy used as the outermost layer of the core material was wound, but the wire rod itself is not limited to this. For example, it can be used after being plated with other metals. It is also possible to do so.

Therefore, according to the configuration according to the invention described above, the core material of the ear hook portion having the rope structure is
Made of Ti/Ni clad material, and its outermost layer
Since it is made of rolled and laminated Ni-Cr alloy, it is possible to reduce the overall weight, improve corrosion resistance, and have good surface plating properties and high brazing strength. Additionally, when winding the winding material around the surface of the core material during manufacturing, since the outer skin of the core material is made of Ni, the lubrication effect of Ni prevents friction in the circumferential direction between the core material and the winding material. At the same time, the hardness of the two is well matched and loosening can be prevented, resulting in excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the eyeglass frame according to this invention, Fig. 2 is a partially enlarged cross-sectional view of the ear hook part that also constitutes the temple part, and Fig. 3 A, B, and C are the same. FIG. 3 is an explanatory diagram showing the manufacturing process of the wire rod. DESCRIPTION OF SYMBOLS 1... Eyeglass frame, 5... Tsune part, 7... Ear hook part, 8... Core material, 10... Ni-Cr alloy wire material.

Claims (1)

[Scope of Claim for Utility Model Registration] In a temple part in which the ear hook part has a rope structure, the ear hook part has a core material made of a cladding material in which Ti is the base metal and Ni is the coating metal, and Ni-
1. A temple structure of an eyeglass frame, characterized by having a wire structure in which a wire made of a Cr alloy is wound and laminated on at least the surface of the outermost layer.