JPH032889Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plastic eyeglass frame molded from plastic resin, which prevents the occurrence of welds and allows the eyeglass frame and hinge to be firmly integrated.

Conventionally, when molding eyeglass frames made of plastic resin, plastic resin is extruded and injected into the mold from the lower center of the frame, the so-called nose pad, toward the upper center of the frame. As the plastic resin flows toward the other hinge, the plastic resin comes into contact with the upper and lower parts of the hinge, and the area where they intersect is weaker than other areas.
In the end, this part was the cause of the frame breaking.

In view of these drawbacks, the present invention provides a plate-shaped metal fitting that has through-holes at the top and bottom and a ring on the top for screwing the temple, and the metal fitting is placed in vertical contact with the lens fastening location of the frame body. In order to solve the above-mentioned drawbacks, we have provided a plastic eyeglass frame in which the metal fittings and the frame body are integrally connected by flowing plastic resin into the lower through-hole. An embodiment will be described based on the drawings. Reference numeral 1 denotes a frame body of a plastic eyeglass frame according to the present invention, and a flat metal fitting 2 is formed separately from the frame body 1, and the metal fitting 2 is attached to the frame body. It is integrally connected to 1.

That is, the metal fitting 2 has a flat plate shape as described above, but two upper and lower through holes 3 and 4 are bored in the flat plate part, and a ring 5 is provided at the upper end of the metal fitting 2.
is formed protrudingly.

A mold is formed so that the lens fastening point 6 of the frame body 1 has a flat shape, and a pair of upper and lower metal fittings 2 are placed in the lens fastening point 6 in abutting state, as in the conventional case. When molding eyeglass frames, plastic resin is extruded and injected into the mold from the lower center of the frame body 1, the so-called nose pads 7, 7a, toward the upper center of the frame body 1.

By extrusion injection of such plastic resin,
As shown in FIG. 5, the plastic resin forming the frame body 1 flows into the lower through hole 4 of the metal fitting 2, and the frame body 1 and the metal fitting 2 are firmly connected together by the plastic resin. The screw hole 8 of the ring 5 protruding from the upper end of the ring 2 has a ring 9.
It is formed to a size that allows it to be screwed into the screw hole 10 with a plastic bolt.

Incidentally, to fasten the lenses at the lens fastening points 6 of the frame body 1, as shown in FIG. This can be done by integrating the metal fittings 2 with plastic resin and screwing the metal fittings 2 together with plastic bolts.

Furthermore, if the lower through hole 4 of the metal fitting 2 is formed into a tapered shape, the plastic resin flowing into the lower through hole 4 can achieve a more integral connection. Although plastic bolts are shown, the present invention is not limited to plastic bolts, and may also be metal bolts or metal bolts coated with resin.

In short, the present invention provides a flat metal fitting 2 in which through holes 3 and 4 are formed on the upper and lower sides and a ring 5 is formed on the upper side to which a temple 9 is screwed.
The metal fitting 2 and the frame body 1 are integrally connected by placing them in vertical contact with the lens fastening point 6 of the frame body 1 and letting plastic resin flow into the lower through hole 4. When molding an eyeglass frame, plastic resin is extruded and injected from the lower center of the frame body 1 in the mold, the so-called nose pad 7, toward the upper center of the frame body 1. The plastic resin flowed toward the hinge and came into contact with the top and bottom at the hinge, which eventually caused a weld in this area and caused the frame to break. Even so, since metal fittings 2 are integrally connected to the lens fastening points 6 of the frame body 1 on the upper and lower sides, the flow of plastic resin on the upper and lower sides can be stopped by the metal fittings 2 on both the upper and lower sides, and molding can be carried out unlike conventional methods. It is possible to completely eliminate the problem of welds occurring in the upper and lower contact areas, which caused frame bending, and since the frame body 1 and metal fittings 2 are completely firmly integrated with plastic resin, it is permanent. Its practical effects, such as being able to use it, are enormous.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figure is a front view of the plastic eyeglass frame according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of the metal fittings, FIG. The figure is an abbreviated sectional view. 1...Frame body, 2...Metal fittings, 3...Upper through hole,
4... Lower through hole, 9... Vine.

Claims (1)

[Scope of utility model registration request] In a flat metal fitting that has through holes at the top and bottom and a ring on the top for screwing the temple, the metal fittings are placed in vertical contact with the lens fastening location of the frame body, and the bottom through hole is formed. A plastic eyeglass frame characterized by integrally joining the metal fittings and the frame body by flowing plastic resin into the frame.