Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1999-07-21
2000-09-12
Dang, Hung Xuan
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351 57, G02C 900
Patent
active
061167312
DESCRIPTION:
BRIEF SUMMARY
This invention relates to sunglasses with an optical spectacle insert which consists of a frame for two spectacle lenses and in the vicinity of its nose piece can releasably be connected with the sunglasses.
In known sunglasses of this kind (U.S. Pat. No. 5,412,438) there is provided an integral sun protection disk which is inserted in a frame consisting of a forehead-side bridge at which spectacle bows are pivotally mounted and which on its inside carries a replaceable headband put onto the same, which rests against the forehead of the spectacle user. In the vicinity of the nose, the sun protection disk is provided with a recess which replaceably accommodates a nose pad. To be able to use an optical spectacle insert, there is provided a nose pad with a mounting lug protruding upwards on the inside of the sun protection disk, onto which mounting lug the optical spectacle insert can be put with a nose strap bent out against the sun protection disk in a U-shaped manner. It is disadvantageous in this known attachment of the optical spectacle insert at the sunglasses that an integral sun protection disk with a replaceable nose pad is absolutely necessary.
For fixing an optical spectacle insert between a nose piece and a forehead-side portion of a sunglass frame, it is also known to fix a coupling piece in the manner of a snap lock between the nose piece and the forehead-side portion of the sunglass frame, which coupling piece is provided for selectively accommodating either the optical spectacle insert provided with a nose pad or merely a nose pad.
For connecting the optical spectacle insert or the nose pad with the coupling piece, the coupling piece can either be provided with a vertical plug-in hole for a plug-in projection provided at the nose pad or at the frame of the optical spectacle insert (U.S. Pat. No. 5,170,502), or with locking recesses into which two parallel bow webs engage in the manner of a snap lock, which bow webs are formed either by the frame of the optical spectacle insert or by a bow top of the nose pad (DE 34 13 872 C2). Apart from the comparatively large construction effort, a disadvantage of this prior art is the respectively necessary adaptation of the frame of the optical spectacle insert to the respective recess of the coupling piece. Comparable disadvantages are also obtained in another known construction (U.S. Pat. No. 5,410,763), where the nose piece of the frame of the optical spectacle insert has two plug-in projections protruding against a nose piece of the sunglasses, which plug-in projections engage in corresponding plug-in recesses of the nose piece of the sunglass frame. To ensure a firm contact of the sunglasses with the head of the wearer, the frame for the integral sun protection disk carries a substantially U-shaped foam pad on the inside, into whose profile protrudes the frame of the optical spectacle insert.
It is therefore the object underlying the invention to provide sunglasses with an optical spectacle insert as described above such that a simple attachment of the spectacle insert can be ensured without a restriction to the respective construction of the spectacle insert or the sunglasses.
This object is solved by the invention in that in its nose piece the optical spectacle insert has a through hole for at least one plug-in projection of an attachment plug engaging in a plug-in recess of the forehead-side portion of the sunglass frame.
By means of the plug-in projection of the attachment plug protruding through the nose piece of the optical spectacle insert in a through hole, the spectacle insert can easily be clamped between the attachment plug and the forehead-side portion of the sunglass frame in the vicinity of the nose piece, when the plug-in insert of the attachment plug engages in the plug-in recess of the sunglass frame. It is therefore merely necessary to provide a corresponding plug-in recess in a forehead-side portion of the sunglass frame, which is possible both in the case of a forehead-side frame web for accommodating an integral sun protection dis
REFERENCES:
patent: 5170502 (1992-12-01), Hegendoerfer et al.
patent: 5410763 (1995-05-01), Bolle
patent: 5412438 (1995-05-01), Bolle'
Dang Hung Xuan
Silhouette International Schmied GmbH & Co. KG
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