Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Eyeglass hinge
Patent
1996-02-05
1998-08-11
Mah, Chuck
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Eyeglass hinge
16266, 16386, 351153, G02C 522
Patent
active
057910154
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a hinge connection between an eyeglass temple and a frame for eyeglass lenses.
Hinge connections of the above type have the advantage that when they are used, hinge screws or other loose connecting parts or additional spring elements of conventional hinges can be dispensed with. With conventional hinges it is difficult to fasten the hinge screw in such a way that, on the one hand, the hinge does not have too stiff a motion and, on the other hand, that the hinge screw does not become loose so that the hinge no longer has any motion regulation.
Hinge connections are more simple which can do without hinge screw or other loose connection parts or additional spring elements.
The U.S. Pat. No. 1,504,212 reveals a hinge connection for an eyeglass frame where a joint element and a mounting element can be coupled directly. To allow coupling a pin, from which a prolongation protrudes laterally for the fixation of an eyeglass temple, can be introduced into the mounting element by pushing in the direction of its longitudinal axis. To allow introduction of the pin together with the prolongation into the mounting element, the mounting element possesses a T-shaped slit. The introduction aperture for the prolongation is positioned within the swivel range of the prolongation results from the swiveling of the eyeglass temple between the temple opening position and the temple closing position. This known hinge connection has the disadvantage that a holding nut is required to secure the connection.
The German A1 34 04 511 reveals a hinge with two meshing hinge parts which are connected to each other in a swiveling fashion. The eyeglass temples possess on each end which is to be connected to the frame a hinge part designed as a joint element which can be directly coupled with a further hinge part on the eyeglass frame where said hinge part is designed as a mounting element.
The screw securing of replaced with this hinge by a snapping, clicking or trapping of one hinge part into the other ("snapping effect"). Here, it is necessary to expand parts of the mounting element. The material must therefore possess very high inherent elasticity in order to allow the required elastic shaping (the clear width of the "attachment channel" is, for example, 20% smaller than the diameter of the pin which is snapped in). However, there are hardly any materials which additionally also possess the stability and connectability with other materials required for an eyeglass hinge.
In order to obtain sufficient stability, the hinge part designed as a mounting element must additionally be so large in size that it is not suitable for narrow lugs and eyeglass temples. Finally, the eyeglass temple can be dismantled not only in the spectacle closing position, but also in the spectacle opening position and in any intermediate position. This is, however, a disadvantage for safety reasons.
The object of FR PS 1126049 is also a hinge connection with a "snapping effect". Here, the introduction aperture for a joint element is positioned in such a way that the part to be introduced does not fit into the introduction aperture in the swivel range produced. The hinge connection is unsuitable for hinges with the smallest possible dimensions and particularly for metal frames with small dimensions. The hinge material must also have the material properties specified in DE-A1 34 04 511.
With the hinge connection revealed by DE-A1 42 14 531 the hinge part of the eyeglass temple can also be directly coupled with a hinge part on the frame. According to one of the embodiments, which is, however, suitable for plastic frames, a pin is fixed to the eyeglass temple which possesses a radially protruding elongation at its free end. The pin is inserted into a borehole on the frame whereby for assembly the elongation is guided by a groove on the internal circumference of the borehole.
With this hinge the connection between pin and eyeglass temple is subject to high strain. This means either a less stable joint connection or that
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patent: 1504212 (1924-08-01), Carlson
patent: 3999876 (1976-12-01), Manchester
patent: 4644891 (1987-02-01), Niina
patent: 4916968 (1990-04-01), Kabaya
Gurley Donald M.
Mah Chuck
Optische Werke G. Rodenstock
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