JPS60156035A - Metallic frame spectacles - Google Patents

Abstract

PURPOSE:To provide the constitution with the decreased number of parts without the need for a brazing operation by forming a bridge, rim and hinge bracket into a metallurgically integral structure. CONSTITUTION:A metallic material forming a bridge 1, upper rim 2 and hinge bracket 4 of spectacles is formed of a nickel alloy, titanium alloy, beryllium alloy, stainless steel, aluminum alloy or the like. The parts 1, 2, 4 of the spectacles are metallurgically integrally molded and pressed. Forming dies formed with cavities in both of upper and lower dies are preferably used in this case, by which the required shape over the entire circumferential surface of the molding is beautifully delineated. The molding a punched with pivotal holes 41 in the pivotal fitting parts of the brackets 4 for temples by a means such as drilling and is punched with screw holes for setting lower rims 5 by means of screws S at the bottom end face of the upper rim 2.

Description

[Detailed description of the invention] The present invention relates to improvements in metal frame eyeglasses.

The purpose is to provide a new type of metal frame eyeglasses that can be manufactured efficiently with an extremely small number of parts and no additional work required for soldering.

Another object of the present invention is to provide the strongest metallographic structure,
Moreover, we provide metal frame glasses that have a sense of unity and a clean design.

As is well known, the front frame portion of conventional metal frame eyeglasses is manufactured by separately manufacturing the bridge, rim, and hinge bracket, and then brazing these parts together in a predetermined arrangement. For this reason, parts of conventional metal frame glasses with solder may come off carelessly.

Brazing may create unsightly cracks or gaps in parts, which is a major disadvantage in terms of quality control.In addition, brazing is extremely inefficient as the assembly process becomes complicated due to the work involved. It was a target.

The present invention was made in view of the above-mentioned inconveniences in conventional metal frame glasses.
To explain based on the embodiment shown in FIG. 3 and FIG. 3, there is a bridge 1, upper rims 2, 2 with a lens-compatible shape extending from both ends of the bridge 1, and temples 3 at the ends of these upper rims 2, 2. Hinge brackets 4 and 4 that pivot 3
The present invention provides metal frame eyeglasses characterized by forming a metallurgically integrated structure.

Further notes regarding the present invention are as follows: 2. Bridge of glasses according to the present invention 1. Upper rim 2. The metal material used to form the hinge bracket 1-4 includes not only the conventionally known nickel alloy material but also a titanium alloy material.

Beryllium alloy, stainless steel, aluminum alloy, etc. are also used.

1. Bridge using such metal material. Press molding is the most suitable method for metallurgically molding the upper rim 2° and the hinge bracket 4, but when this press molding method is adopted, cavities are formed in both the upper mold and the lower mold. It is preferable to use a molding die that is suitable for molding, and by doing so, it is possible to create a beautiful shape that fits around the entire circumference of the molded product. In the thus obtained molded product, a pivot hole 41 is formed in the temple pivot portion of the hinge bracket 4 by drilling or other means, and a descending rim 5 is attached to the lower end surface of the upper rim 2 with a screw S. All you have to do is drill a screw hole for fastening (see Figure 1).

It is also preferable that the temple 3, which is to be pivotally attached to the pivot hole 41 of the hinge bracket 4 by the shaft S, has the hinge piece 31 portion formed integrally with metallurgy. Therefore, the press molding method is also adopted for the molding.

However, in this way, Bridge 1. The metal frame eyeglasses of the present invention, in which the upper rim 2° and the hinge bracket 4 are metallographically integrated, have a front design with smooth and natural lines, so they have a strikingly sleek appearance.
In addition, unlike conventional products, brazed products do not have the weak point of breaking at a certain point, have surprisingly high shear strength, and exhibit ideal springiness.In addition, brazed products do not require any work, so the manufacturing process can be simplified. The simplification greatly increases productivity, the number of parts is drastically reduced, which makes inventory management easier, and the frequency of defective products decreases, which is advantageous in terms of quality control. In addition, the present invention can meet the demand for reducing the weight of the frame when titanium alloy or aluminum alloy material is used as the material metal, and this advantage should also be noted.

The present invention will be described in more detail below with reference to two examples.

(Mitsukata Itari) First, a metal wire (6φ) made of titanium alloy.

Metal wire (6φ) made of aluminum alloy.

17 pieces of metal wire (6φ) made of nickel alloy
It is cut into 5 lengths, annealed in a vacuum furnace, and temporarily bent so that it can be inserted into the cavity shape of a press mold. Next, the temporarily bent metal wire is inserted into the cavity of a press mold (both the upper mold and the lower mold have cavities) and pressed, and then unnecessary parts are cut using a cutting die. leave

The molded product thus obtained was annealed again in a vacuum furnace and subjected to finishing processes such as polishing, tapping, and correction pressing, resulting in a brissolier as shown in FIG. In addition, metal frame eyeglasses in which the hinge bracket 4 portions were metallurgically integrated were obtained.

The weight of the front frames of eyeglasses made from each of these metal materials was as follows.

Heavy 1 level comparison table (Unit: g)

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the front frame portion of the metal frame eyeglasses of the present invention, FIG. 2 is a perspective explanatory view of the temple portion used in the same eyeglasses, and FIG. 3 is a front frame of another embodiment of the metal frame eyeglasses of the present invention. It is an explanatory view of a part. 1...Bridge, 2...Upper rim, 3...Temple. 4°...hinge bracket, 5...lower rim. S... bis. Patent applicant Hamamoto Technical Co., Ltd. Representative Patent Attorney Koji Togawa Figure 3 Figure 1 Δ Figure 2

Claims (1)

[Claims] ■ A bridge 1, and upper rims 2, 2 having a lens-compatible shape extending from both ends of the bridge 10. These metal frame eyeglasses are characterized in that the hinge brackets 4, 4, which pivotally connect the temples 3, 3, to the ends of the upper rims 2, 2 form a metallurgically integrated structure. (2) The metal frame eyeglasses according to claim (2), wherein the lower rims 5, 5 are fixedly attached so as to be continuous with the upper rims 2, 2. (2) The metal frame eyeglasses according to any one of claims (1) and (2), wherein the hinge piece 31 of the temple 3 is metallurgically integrated. ■ Bridge 1. Upper rim 2.2. The metal frame eyeglasses according to claim 1, wherein the hinge brackets 4 and 4 are made of titanium alloy. ■ Bridge 1. Upper rim 2.2. The metal frame eyeglasses according to any one of claims □■ to ■, wherein the hinge brackets 4 and 4 are provided with metallurgical integrity by plastic deformation of the metal material.