JPH069737Y2 - Joining structure of spectacle pad arm composed of metal material with brazing resistance - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to firmly and stably braze a pad arm made of a metal having difficulty brazing such as a superelastic alloy or a shape memory alloy to metal rim eyeglasses. This is a new technology that is useful for general consumers as it not only promotes the use of superelastic alloys and shape memory alloys in the field of eyeglasses, but also improves the wearing performance of eyeglasses. Is.

[Conventional technology and problems to be solved]

As is well known, it is difficult to braze titanium alloys called superelastic metals, or so-called "shape memory alloys" that have the function of recovering the shape before deformation by keeping a temperature above the transformation temperature, or aluminum alloys. It is believed that, especially for metal rim eyeglasses that support the clings nose pad through a linear or strip-shaped pad arm, its difficult brazing property is a bottleneck and cannot be adopted. There is.

However, since the superelastic alloy material and the shape memory alloy material have the ideal physical properties as a pad arm, there is an extremely high demand for their use.

Therefore, various attempts have been made in the eyeglass manufacturing industry to join the super elastic alloy material and the shape memory alloy material to the dissimilar metal material (for example, a method in which the dissimilar metal material is nickel plated and then brazed). However, sufficient bonding strength has not been obtained yet, and it has not been put to practical use.

The present invention provides a new technology capable of easily and firmly brazing a metal wire or a metal strip having a difficult brazing property such as a superelastic alloy or a shape memory alloy to a thin metal eyeglass frame as a pad arm. This is a technical issue.

[Means adopted for solving the problem]

Means for solving the above technical problem will be described below with reference to the accompanying drawings.

That is, the present invention relates to an eyeglass composed of a braze-resistant metal material such as a superelastic alloy or a shape memory alloy in the inner tube portion of the brazeable metal pipe member 2 into which the molten brazing material is injected. A pipe member 2 in which both ends of the pad arm 1 are inserted and joined together and tightened in a centripetal direction, and joined to both ends of the pad arm 1.
Since the pipe member 2 of 2 is brazed to the front frame 3 and the holder box 4 is brazed to the other pipe member 2, the inner tubular portion of the pipe member 2 has a large size. Adhesive area, adhesive force of the molten brazing filler metal injected into the inner cylinder, and embracing rolling property that occurs when the pipe member 2 is tightened in the centripetal direction are skillfully utilized to make the brazing metal difficult and the brazing metal good. The gist resides in that it is possible to firmly bond the nose pad 5 to the holder box 4 thus bonded, and to stably and securely support the nose pad 5 for a long term.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. In addition, FIG. 1 is a partial front view showing the nose pad supported by the metal rim eyeglasses by applying the present invention, and FIG. 2 is a state just before the end of the pad arm is inserted into the pipe member and brazed. It is a partial perspective explanatory view showing.

In the drawing, what is indicated by reference numeral 1 is a linear pad arm composed of a Ti-Ni shape memory alloy, and a transformation temperature: 60
It is set to ℃.

What is indicated by reference numeral 2 is a pipe member composed of a Ni-Cu alloy (white silver), and the inner diameter thereof has a size capable of inserting the end portion of the pad arm 1.

In this embodiment, the end portion of the pad arm 1 is inserted into the inner cylindrical portion of the pipe member 2 into which the molten silver braze is injected, and both members 1 are inserted.
・ 2 is joined, and at that time, the pipe member 2 is centripetically tightened to join the two.

Then, the holder box 4 is brazed to the one pipe member 2 with a silver brazing material, and the nose pad 5 is connected to the box 4 as shown in FIG.

Thus, when the other pipe member 2 is brazed to the nickel-white front frame 3 with silver brazing, the pad arm 1 made of the difficult-to-braze shape memory alloy wire rod is stable and strong at a predetermined position of the metal rim eyeglasses. Will be joined to. Incidentally, in FIG. 1, the bumps indicated by black in reference numeral 6 represent the solidified state of the silver wax.

Although the present embodiment is configured generally as described above, the present invention is by no means limited to the above embodiments, and various modifications can be made within the scope of the "claim for utility model registration". For example, in the present invention, the metal material forming the pad arm is not necessarily limited to the superelastic alloy material or the shape memory alloy material, but can also be applied to the aluminum alloy pad arm. The shape of 2 does not necessarily have to penetrate the other end of the inner cylinder, and may be formed in the shape of a blind hole.

[Effect of the present invention]

As described above with reference to the embodiments, in the present invention, both ends of a pad arm made of a metal material having a low brazing property are covered with brazable metal pipe members, and the pipe member, the pad arm and the molten metal are covered. Since the brazing material is centripetically tightened and firmly joined together, this brazable metal pipe member is similar to the metal material used for the front frame and holder box and conventional metal frame glasses. It is now possible to braze firmly and stably to a predetermined place.

Therefore, if metal eyeglasses are manufactured by applying the present invention, a super elastic alloy or a shape memory alloy can be adopted as a material of the pad arm, so that the nose pad is supported by the pad arm in a very ideal state. In addition to providing a comfortable feeling to the wearer, it does not become out of order even if it is used for a long period of time, and if a shape memory alloy is used as the material of the pad arm, it may go out of order. Even if it does, even if the history of a predetermined temperature is restored, the original ideal state can be recovered, and a very large practical effect can be obtained.

[Brief description of drawings]

FIG. 1 is a partial front view showing the nose pad supported on metal rim eyeglasses by applying the present invention, and FIG. 2 shows a state just before brazing by inserting an end portion of a pad arm into a pipe member. It is a partial perspective view. 1 ... Pad arm, 2 ... Pipe member, 3 ... Front frame, 4 ... Holder box, 5 ... Nose pad.

Claims (1)

[Scope of utility model registration request] 1. A spectacle pad composed of a braze-resistant metal material such as a superelastic alloy or a shape memory alloy, in the inner tube portion of a brazeable metal pipe member 2, into which a molten brazing material has been injected. Arm 1
The pipe member 2 with both ends of the pipe inserted and joined
2 is tightened in the centripetal direction, and one pipe member 2 of the pipe members 2 joined to both ends of the pad arm 1 is brazed to the front frame 3 and the other pipe member 2 has a holder box 4 Is brazed,
A joint structure of an eyeglass pad arm composed of a metal material having a low brazing property, characterized in that the nose pad 5 is supported on the holder box 4.