Fastening of a structural part to an ophthalmic lens

Abstract

An ophthalmic lens fastening consists of a structural part and a sleeve. The sleeve is slidable into an elongated hole of an ophthalmic lens, and one end of the structural part is slidable into the sleeve such that a latching connection with a press fit is formed.

Claims

1. An ophthalmic lens fastening, comprising: a structural part including parallel fastening pins and a fastening web connecting the parallel fastening pins; and a sleeve, wherein the sleeve is slidable into an elongated hole of an ophthalmic lens and one end of the structural part is slidable into the sleeve such that a latching connection with a press fit is formed, wherein on one face, the sleeve comprises a stop head which is greater in dimension than the dimension of the elongated hole and consequently bears against the ophthalmic lens, and wherein, on another face situated oppositely to the face of the stop head, the sleeve comprises a bead-like rim that is formed as a result of displacement of material of the sleeve by the fastening web when the structural part is inserted.

2. The ophthalmic lens fastening according to claim 1, wherein the sleeve is slidable into the elongated hole from an outer face of the ophthalmic lens and the structural part is slidable into the sleeve from a face that is located opposite the outer face.

3. The ophthalmic lens fastening according to claim 1, wherein the parallel fastening pins include barb-like bulges.

4. Spectacles having an ophthalmic lens and an ophthalmic lens fastening according to claim 1.

5. A method for fastening a structural part to an ophthalmic lens, said method including the following steps: a) sliding a sleeve into an elongated hole of the ophthalmic lens; b) forming a bead-like rim on the sleeve by sliding a structural part including parallel fastening pins and a fastening web connecting the parallel fastening pins into the sleeve, wherein the sleeve is slid in from an outer face of the ophthalmic lens and the structural part is slid into the sleeve from an oppositely situated face, wherein the sleeve comprises a stop head which is greater in dimension than the dimension of the elongated hole on a face of the sleeve, and wherein the fastening web displaces material of the sleeve upon insertion of the structural part in such a manner that the bead-like rim is formed on a face of the sleeve oppositely situated from the surface of a stop head.

Description

(1) The present invention is explained in more detail below by way of Figures and examples. The Figures are as follows:

(2) FIG. 1 shows the components of an ophthalmic lens fastening of the present invention in cross section in the mounted state.

(3) FIG. 2 shows the components of the ophthalmic lens fastening in longitudinal section in the mounted state.

(4) FIG. 3 shows the components of the ophthalmic lens fastening in cross section in the mounted state, with explicit representation of the bead-like rim.

(5) FIG. 4 shows the components of the ophthalmic lens fastening in longitudinal section in the mounted state, with explicit representation of the bead-like rim.

(6) FIG. 5 shows the components of the ophthalmic lens fastening according to a second embodiment in cross section in the mounted state.

(7) FIG. 6 shows the components of the ophthalmic lens fastening according to the second embodiment in longitudinal section in the mounted state.

WAYS TO EXECUTE THE INVENTION

(8) The ophthalmic lens fastening consists of a structural part 1 and a sleeve 2. Said two parts are wedged into one another in such a manner in an elongated hole 8 in the spectacle lens 4 that they form a latching connection with a press fit.

(9) The end of the structural part 1 consists of parallel fastening pins 5 which are provided with barb-like bulges 7.

(10) The sleeve 2 is inserted from the front face of the ophthalmic lens into the lens until the stop head 3 prevents any further insertion.

(11) As a result of selecting the correct length or as a result of cutting the sleeve 2 to length, said sleeve remains somewhat longer than the ophthalmic lens 4 is thick at the position of the elongated hole 8.

(12) The structural part 1 is prepared technically such that, in the inserted position, the fastening web 6 closes directly with the rear face of the sleeve 2.

(13) As a result of the press fit between the structural part 1 and the sleeve 2 in the elongated hole 8 of the ophthalmic lens 4, the barb-like bulges 7 of the structural part 1 latch into the material of the sleeve 2.

(14) The technical preparation of the barb-like bulges 7 enables only a pulling movement from the front face to the rear face of the ophthalmic lens 3. When pulled in the opposite direction, the barb-like bulges 7 of the structural part 1 are wedged in the sleeve 2.

(15) The stop head 3 blocks the sleeve on the front face of the ophthalmic lens 4. As a result of the positive locking connection between the structural part 1, the sleeve 2 and the ophthalmic lens 4, the sleeve 2 is stretched, as a result of which a press fit is generated.

(16) As a result of the material of the sleeve 2 being displaced by the fastening web 6, a bead-like rim 9, which creates advantageous fastening conditions, is generated in the case of the part of the sleeve which projects above the edge of the ophthalmic lens 4.

(17) In the latched state, the structural part 1 and the sleeve 2 together form a connection which is inserted deeply in the elongated hole 8 of the ophthalmic lens 4.

(18) FIGS. 5 and 6 show a second embodiment. This corresponds largely to the first embodiment according to FIGS. 1-4.

(19) The ophthalmic lens fastening consists once again, therefore, of a structural part 1 and a sleeve 2. Said two parts are wedged into one another in such a manner in an elongated hole 8 in the ophthalmic lens 4 that they form a latching connection with a press fit. The end of the structural part 1 consists of parallel fastening pins 5 which are provided with barb-like bulges 7.

(20) The sleeve 2 is inserted from the front face of the ophthalmic lens into the lens until the stop head 3 prevents any further insertion. As a result of selecting the correct length or as a result of cutting the sleeve 2 to length, said sleeve remains somewhat longer than the ophthalmic lens 4 is thick at the position of the elongated hole 8.

(21) The structural part 1 is prepared technically such that, in the inserted position, the fastening web 6 closes directly with the rear face of the sleeve 2.

(22) As a result of the press fit between the structural part 1 and the sleeve 2 in the elongated hole 8 of the ophthalmic lens 4, the barb-like bulges 7 of the structural part 1 latch into the material of the sleeve 2 in the same way as in the case of the first embodiment.

(23) As a result of the material of the sleeve 2 being displaced by the fastening web 6, a bead-like rim 9 is created in the case of the part of the sleeve which projects above the edge of the ophthalmic lens 4. This is then supported here by a widening of the fastening web 6 of the structural part 1. The widening is produced from a width of the structural part 1 which tapers in the distal direction toward the parallel fastening pins 5. In the mounted state, the tapering portion is situated in the region of the bead-like rim 9. Realization of the bead-like rim 9 for the axial securement of the sleeve 2 on the ophthalmic lens 4 is possible with a wider selection of materials and geometries for the sleeve 2 on account of said modified geometry of the structural part 1.