METHOD FOR FITTING SPECTACLE LENSES INTO FULL RIM SPECTACLE FRAMES

Abstract

A method for fitting spectacle lenses into full rim spectacle frames, comprising machining the edge of the spectacle lenses to be fitted, wherein, a circumferential, step-like chamfer with a curvature determined as a section of a sphere surface with a defined radius is worked into the spectacle lens holders in the full rim spectacle frame on the front or back side, then the edge of the spectacle lenses is machined, in the form of a front-side or back-side circumferential step-like bevel with a curvature determined according to the sphere surface with a defined radius of the chamfer. The spectacle lenses are fitted into the holders in the full rim spectacle frames on the front or back side, with precise engagement of the bevel into the chamfer of the spectacle frame, and the inserted spectacle lenses are adhesively bonded and/or welded to the holders in the full rim spectacle frame.

Claims

1. Method for fitting spectacle lenses into full rim spectacle frames, comprising machining the edge of the spectacle lenses to be fitted, comprising the method steps of: working a circumferential, step-like chamfer with a curvature determined as a section of a sphere surface with a defined radius r into the holders for the spectacle lenses in the full rim spectacle frame on the front side or back side, machining the edge of the spectacle lenses to be inserted, in the form of a front-side or back-side circumferential step-like bevel with a curvature determined according to the sphere surface with a defined radius r of the chamfer, which consequently represents an exact negative image of the step-like chamfer worked into the spectacle frame, fitting the spectacle lenses into the holders in the full rim spectacle frames on the front or back side, with precise engagement of the bevel into the chamfer of the spectacle frame, and adhesively bonding and/or welding the inserted spectacle lenses to the holders in the full rim spectacle frame.

2. Method for fitting spectacle lenses into full rim spectacle frames according to claim 1, wherein the step-like chamfer in the holders for the spectacle lenses in the spectacle frame is already worked-in in standardized form during the production of the spectacle frame.

3. Method for fitting spectacle lenses into full rim spectacle frames according to claim 2, wherein the full rim spectacle frames are produced with exact fit together with the step-like chamfer in a 3-D printing method.

4. Method for fitting spectacle lenses into full rim spectacle frames according to claim 1, wherein the fabrication of the step-like chamfer in the spectacle frame and the marginal step-like bevel on the spectacle lens is realized by way of computer-assisted manufacturing (CAM) by way of CAD data, which undertake the material machining by means of CNC machines.

5. Method for fitting spectacle lenses into full rim spectacle frames according to claim 1, wherein fitting of the spectacle lenses into the spectacle frame is implemented in automated fashion, wherein there is conveying of the spectacle frames into an assembly position and positioning of said spectacle frames therein, and conveying of the spectacle lenses to the holders of the spectacle frames and positioning of said spectacle frames thereon, and machine fitting of the spectacle lenses into the holders in the spectacle frames with concluding welding and/or adhesive bonding for the final secure connection between the spectacle lenses and the full rim spectacle frames.

6. Method for fitting spectacle lenses into full rim spectacle frames, comprising a machining of the edges of the spectacle lens elements to be fitted, according to claim 4, wherein the temples are only assembled after fitting the spectacle lenses into the full rim spectacle frame during the automated manufacture of the spectacles.

7. Spectacles manufactured according to claim 1, comprising a full rim spectacle frame and marginally machined spectacle lenses that are provided with bevels, wherein the spectacles further comprise front-side or back-side circumferential step-like chamfers with a curvature determined as a section of a sphere surface with a defined radius r are arranged in the full rim spectacle frame in the holders for the spectacle lenses, and the inserted spectacle lenses have a front-side or back-side marginally circumferential step-like bevel with a curvature determined according to the sphere surface with a defined radius r of the chamfer, which is embodied as an exact negative image of the step-like chamfer worked into the spectacle frame.

8. Spectacles according to claim 7, wherein the spectacle lenses inserted into the spectacle frame in interlocking fashion are securely connected to the spectacle frame by means of adhesive bonding and/or welding.

9. Spectacles according to claim 7, wherein the bevel of the spectacle lens adapted to the chamfer of the spectacle frame is fabricated to exactly correspond to the shape profile of the spectacle lens holders in the spectacle frame and to the sphere surface radius, which was used on the spectacle frame for fabricating the chamfer, independently of the structural features lens thickness and surface curvature of said spectacle lens.

10. Spectacles according to claim 7, wherein the chamfer worked into the spectacle frame and, consequently, the bevel of the spectacle lenses, which has a negative embodiment in relation thereto, have a defined sphere surface radius of approximately 50 mm to 150 mm.

Description

[0037] Below, one or more embodiments of the invention is explained in more detail on the basis of drawings. In detail:

[0038] FIG. 1 shows a lateral view of a full rim spectacle frame according to the invention with a worked-in chamfer and lined-up spectacle lenses,

[0039] FIG. 2 shows a simplified sectional illustration of a spectacle lens inserted front-side into the spectacle frame,

[0040] FIG. 3 shows a simplified sectional illustration of a spectacle lens inserted back-side into the spectacle frame,

[0041] FIG. 4 shows a frontal view of a spectacle frame according to the invention in a simple embodiment,

[0042] FIG. 5 shows the section A-A through the spectacle frame according to the invention,

[0043] FIG. 6 shows the section B-B through the spectacle frame according to the invention,

[0044] FIG. 7 shows the section C-C through the spectacle frame according to the invention,

[0045] FIG. 8 shows a sectional magnification Z from FIG. 6,

[0046] FIG. 9 shows a perspective view of the spectacle frame according to the invention in a simple embodiment,

[0047] FIG. 10 shows an exploded perspective view of the spectacle frame according to the invention with lenses arranged for insertion,

[0048] FIG. 11 shows a detail view of two different lens types showing identical connecting areas, and

[0049] FIG. 12 shows a further detailed view of the lenses of FIG. 11.

[0050] FIG. 1 illustrates a lateral view of a full rim spectacle frame 1 according to an embodiment of the invention with a worked-in chamfer 2, wherein, for clarification purposes, a back-side insertion of the spectacle lens 3 is brought about by an appropriate arrangement of chamfer 2 and bevel 4 on the right-hand side and a front-side insertion of the spectacle lens 3 is provided on the left-hand side in this case.

[0051] The ground bevel 4 is likewise identifiable on the spectacle lens 3 itself, said bevel being embodied in the form of a step 5 that tapers to the front curvature of the spectacle lens 3 in the case of a back-side insertion into the spectacle frame 1 (arrow B). In the case of a front-side insertion of the spectacle lens 3 into the spectacle frame 1, the circumferential step 5 is ground into the back side of the spectacle lens 3 (arrow A). Accordingly, this figure only serves to clarify that provision can be made of both a front-side and a back-side insertion, with either the one or the other variant being able to be present on a spectacle frame.

[0052] FIGS. 2 and 3 show the inserted spectacle lenses 3 in the spectacle frames 1 in a simplified sectional illustration, wherein the spectacle lens is inserted front-side in FIG. 2 and back-side in FIG. 3. What was said previously in relation to the engaging arrangements of the step-like chamfer 2 and bevel 4 on the spectacle frame 1 and spectacle lens 2 also applies here. The thicknesses of spectacle lens and spectacle frame are not true to scale here.

[0053] FIG. 4 shows a frontal view of the spectacle frame 1 according to an embodiment of the invention in a simple embodiment. It is already clear from this that the spectacle frame can be worked to be very thin since the required stability is brought about by the subsequent connection to the spectacle lens. From the illustration, it is not possible to identify that even thinner, thread-like designs of the frame are realizable.

[0054] Here, a number of sections A-A, B-B and C-C are plotted in FIG. 4. These sections are found again in further FIGS. 5, 6 and 7.

[0055] The section A-A in this case shows a longitudinal section through both frames of the spectacle lenses 3 in a horizontal form. Here, the profile of the step-like chamfer is identifiable as extending from the back side of the spectacle frame 1 in this case. It is clear that said chamfer extends as a circle section, with a radius r of approximately 125 mm in the exemplary illustration.

[0056] The section B-B is guided vertically through a holder for the spectacle lens 3 in the spectacle frame 1, as a result of which the arrangement of bevel 4 and chamfer 2 likewise becomes clear. This is likewise shown, once again, with magnification in the sectional drawing Z of FIG. 8.

[0057] Finally, the section C-C shows the vertical section through the bridge of the spectacle frame in FIG. 7.

[0058] As a result of the perspective view into the spectacle frame, FIG. 9 allows identification of the circumferential profile of the step-like chamfer, in this case with an arrangement on the back side. The delicateness of this connection region, which is introduced here only at approximately 0.5 mm, becomes clear.

[0059] FIG. 10 shows an exploded perspective view of the spectacle frame according to an embodiment of the invention with different types of lenses arranged for insertion.

[0060] FIG. 11 shows a detail view of two different lens types showing identical connecting areas in the form of the bevel 4 according to an embodiment.

[0061] FIG. 12 shows a further detailed view of the lenses of FIG. 11.