Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Temples
Patent
1995-01-09
1997-05-27
Mai, Huy
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Temples
351113, 351153, 16228, G02C 514, G02C 516, G02C 522
Patent
active
056336934
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a new kind of joint, in particular for securing side pieces of spectacles to the frame of spectacles, which joint is capable of elastically securing the side pieces of the spectacles in an open and closed position, and in a position where the side pieces are braced over the temples of an individual wearing the spectacles.
2. Description of the Related Art
Various systems are known in which an elasticity of the side pieces of spectacle frames is achieved. All known systems are based on the installation of an elastic means between the side pieces and joint, which elastic means stores up a part of the straddling force to release it in the form of pressure on the temples or with the snapping motion in the opening and/or closing phase of the side pieces. The known elastic means generally consist of a spring such as for example helical springs, which react on pressure or tension. The spring comprising the elastic means may alternatively consist of leaf springs, which act on direct contact on spherical or differently formed sliders along a profile of a cam that is firmly linked with the spectacles' frame. This cam generally consists of the joint linking the side pieces to the spectacles' frame. However, the cam could be a slider or a specially formed part that acts on the support of the spectacles' frame in which the elastic means is incorporated.
In all known devices for achieving an elasticity, the efficiency is limited by the small dimensions of the elastic means. On the other hand, the elastic means and its other numerous additional parts of which known devices consist must be placed in housings or in holdings of the side pieces which have to be reduced as much as possible. This is time due to aesthetic reasons and by reason of the spectacle size.
The reduction of the components of the known devices to a minimum dimension has the disadvantage of a complicated design and function. Moreover, the reduction of the components to minimum dimensions is the reason for an insufficient function of said devices, and may also be the reason for trouble and irreparable damage to the spectacles.
SUMMARY OF THE INVENTION
It is therefore an advantage of the present invention to produce a joint for side pieces of spectacles which permanently retains its elastic function by having an elastic means not depending on the size of the seating or the dimensions of housings or guidance, so that it can be produced in a suitable size to assure a constant and continuous spring function.
Another advantage of the invention is to limit the components of the elastic device, such as the known guidances, housings, spherical sliders or cams and other component parts, to a small number, which parts otherwise require a corresponding dimensional analysis and often imply a very complex construction and high production costs.
A still further advantage of the present invention to render the assembly or arrangement of the side piece to the joint of the spectacles' frame with an extremely simple design, with the advantage of reduced production time and cost.
Another advantage of the present invention is provide a simple replacement of the side pieces at the spectacles' frame so that different aesthetic solutions for the design of spectacles are made possible.
These problems of the prior art and the achieved advantages are effectively solved with the present invention as appears evident from the following description of one of its constructive solutions. It is understood that the present invention, described hereinafter with respect to the drawings, is not limited to the embodiments set forth herein. Various changes, substitutions and modifications may be made thereto by those skilled in the art without departing from the spirit or scope of the invention as described and defined by the appended claims.
The principle feature of the cross-spring-joint according to embodiments of the present invention is that a side piece end is rotatably fixed in a fork or is provid
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