JPS5924005Y2 - glasses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to eyeglass lenses in which a groove is provided on the outer peripheral end surface of the eyeglass lens and is fixed to the metal frame or to the metal frame by a thin wire.

In such eyeglasses, there is a problem with the precision between the metal frame and the eyeglass lens due to a decrease in precision due to the increased number of grooves required during lens processing compared to conventional eyeglasses.

For example, if the upper mold shape of a processed eyeglass lens is smaller than the planned standard upper mold shape or the groove depth is too deep, the lens circumference will be shortened, and when this lens is attached to a frame, The circumference does not match the upper mold shape of the frame made of the metal frame or the metal frame and thin wire, and the lens is either loosely attached or so loose that it does not fit in the frame.

If it is too loose, especially in a low temperature environment, the lens will further shrink, making it easy for the lens to come off the frame.

Further, contrary to the above case, if the upper mold shape of the lens is too large or the groove depth is shallow, the lens cannot be attached to the frame.

However, as in the latter case, if the upper shape of the lens is too large or the groove depth is too shallow, the outer shape of the lens may be shaved off again, or the grooves may be reprocessed to correct the depth to the appropriate depth. This allows normal use.

If the lens shape is too small or the groove depth is too deep, as in the former case, there is no way to save these lenses, resulting in a large loss in terms of cost.

The present invention has been proposed specifically to alleviate these defects.

Further, in the present invention, since lens processing as described above is generally performed at an eyeglass store, the work must be easily performed by a person engaged in such processing.

An embodiment of the present invention will be described.

1 in each figure is a lens, and as shown in FIG. 2, a groove 2 is formed on the outer periphery of the lens.

The upper half of the lens 1 fits into the protruding strip 4 of the metal frame 3, and the lower half of the lens 1 is supported by a thin wire 5.

In a normal case, the shape of the upper mold of the lens 1 and the shape of the upper mold on the frame side, that is, the shape of the upper mold formed from the metal frame 3 and the thin wire 5, almost match.

However, if the lens is too small or the groove is too deep, the lens circumference and frame circumference will not match, and the lens will not stay in the frame.

In such a lens, the depth of the lens groove is made shallow by forming a layer 6 made of a polymeric material within the lens groove, as shown in FIG.

Therefore, the circumferential length of the lens becomes large and can be made close to the circumferential length of the frame.

Lenses with layers formed in these grooves can be handled in the same way as normal lenses, and can be attached to frames.
Prevents the lens from shaking against the frame.

Another effect is that lenses, especially plastic lenses, have a higher coefficient of thermal expansion than materials such as metal frames, and when the temperature rises, the lens expands and the pressure causes the lens itself to deform. By selecting a soft polymer material to be used in the lens groove, the polymer layer absorbs deformed bones due to thermal expansion of the lens, and deformation of the lens can be minimized.

The polymer material used in the present invention may be plastic or rubber; for example, silicone resin, fluororesin, and nylon resin are soft and have good heat resistance, cold resistance, chemical resistance, etc.

In terms of shape, a tape-like material having a certain width and thickness that matches the lens groove is easy to handle.

Furthermore, if an adhesive is applied to one or both sides of the tape, it can be easily fixed in the lens groove, making it even better.

Also, it can be used in liquid form just by flowing it along the grooves until it solidifies.

Also, for aesthetic reasons, if the polymeric material is transparent, it is possible to hide any traces of correction.

As shown above, the present invention allows for easy lens correction and its effects are great.

In addition to the examples described in the embodiments, in the frame of the present invention, the lens may be held by a metal frame or by a thin wire.

Furthermore, the protruding stripes may be integrated with the metal frame or may be separate pieces.

The aim of the present invention can be achieved regardless of whether the frame or thin wire is made of metal or plastic material.

[Brief explanation of the drawing]

Figure 1 is a partial perspective view of the frame, Figures 2 and 3 are
It is a sectional view taken along the line AA in the figure. 1...Lens, 2...Groove, 3...
...Frame, 4...Convex strip, 5...Thin line, 6
・・・・・・Polymer layer.

Claims (1)

[Scope of utility model registration request] Eyeglasses that use a frame with protrusions on the inner surface or thin wire to hold spectacle lenses with grooves on the outer peripheral end surface, characterized in that a layer made of a polymeric material is formed in the grooves of the lenses. glasses.