WO1994018597A1

WO1994018597A1 - Non-deformable frame for spectacles, and in particular spectacles for children so obtained

Info

Publication number: WO1994018597A1
Application number: PCT/IT1994/000008
Authority: WO
Inventors: Caterino Curto; Gianantonio Longo
Original assignee: F.A.O.M.S. S.N.C. Di Curto & Longo
Priority date: 1993-02-08
Filing date: 1994-02-02
Publication date: 1994-08-18
Also published as: IT1266386B1; ITTV930014A1; CA2122723C; AR248318A1; EP0682781A1; US5465122A; ITTV930014A0; CA2122723A1

Abstract

Non-deformable frame for spectacles, and in particular spectacles for children so obtained, comprising a connection element between the lens surround, consisting of two bodies joined in a non rigid way, one of which is inserted coaxially to the other, and at least one torsion-bar preferably in steel, having the ends anchored to both lens surrounds, and to which the nose pads are associated to the respective lens surround providing for the interposition of a helical spring.

Description

DESCRIPTION NON-DEFORMABLE FRAME FOR SPECTACLES. AND IN PARTICULAR SPECTACLES FOR CHILDREN SO OBTAINED. Technical Field This invention relates to a non-deformable frame for spectacles, and in particular spectacles for children so obtained. The innovation finds particular if not exclusive application in the sector of spectacles; in this case for the realization of a flexible structure, preferably metallic, able to support lenses. Background Art At the present state of the art spectacles are well known. These accessories, always more frequently used by both adults and children, as already observed, can be of the corrective type, to cure eye pathologies, or of the sunglass type, used subjectively as a protection against solar radiation. Spectacles, as a rule, are composed likewise of a frame, and of the respective lenses supported by it which are adapted by shaping them peripherally, according to the internal conformation of the respective, so- called, circles or lens surrounds. In other cases again, variations can be made to the support means of the lenses and can concern portions or parts of frame not joined at their ends, on which, previously, the respective lenses are fixed by screwing means. In this last hypothesis a successive adaptation of the lenses to the frame of the spectacles may not be necessary. Generally, however, the traditional type frames can be subdivided into two large categories depending on the material from which they are made. The first are made of metal, while the second are of plastic material, furthermore alternative solutions could be provided that combine the two materials differently. Both then, have a common structure which provides circles or lens surrounds, held together by one or more connecting bridges depending on the aim. As regards the metallic frame, the use of the bridge, besides having an aesthetic factor, provides a stiffening means for the structure, mainly with the aim to avoid the phenomenon of buckling of the lens surrounds. And a certain rigidity of the structure is surely necessary also for maintaining a correct wearing of the spectacles, ensuring the focusing of the lens with respect to the eye to be corrected. Furthermore nose pads are associated to the frame of the spectacles, which have the function of supporting the frame by causing it to rest with the pad on the surface of the nose. Both for the bridge, and for the anchorage of the nose pads to the frame of the spectacles, one currently resorts to a simple welding of the ends, fixing the whole firmly to the profile of the lens surrounds. In a few variations, the nose pads can also be hinged to the support means to allow a greater adaptability of the frame with respect to the surface of the nose, and therefore avoiding the annoying sliding forwards of the spectacles. However in the above mentioned solution, drawbacks appear, which are in fact that the frame is not sufficiently resistant to knocks and accidental deformation, causing the breaking of the weakest parts, as for example, the joint of the bridge to the lens surrounds, or even causing the deformation of the support arms of the nose pads. The rigidity of the frame, if subjected to an involuntary deformation, could also cause the lens to fall out of the surrounds and possibly break on reaching the ground. Such problems are greater amongst the younger public who are less careful with their spectacles, and also for example when playing games or participating in sports activities, breakages could occur. A proposal to resolve even such a problem, has consisted in providing frames made entirely of a more or less rigid plastic material, for example of the acetate cellulose type, the lens surrounds, joining-bridge and relative nose pads formed monolithically, these last being an increase of the border of the lens frame in correspondence with the resting arch at the bridge of the nose. The drawback of this type of frame is that it does not allow for a correct wearing, above all due to the absence of pronounced nose pads, therefore involving an inability to focus the lens so mounted in the lens surrounds. In the second place, having to guarantee a certain structural rigidity that should tend to prevent natural phenomena of elastic recall of the frame, they are not sufficiently flexible and able to avoid possible breakages in the critical stiffening points of the structure. Some alternatives have intended subdividing the spectacle into two halves providing the use of hinges in an intermediate position with respect to the bridge, or have made only the lens surrounds flexible, playing on the type of material used, while in such a case the bridge and the nose pads have maintained their rigidity. Finally there exist devices, like those for the measurement of the diopters, that act by means of a screw positioned in proximity to the nose pads, that are able to adjust the amplitude of the lens surrounds, extending a telescopic element with bridge function for the connection between the same. But even in these umpteenth solutions it isn't difficult to discover drawbacks, which consist in the fact that both the nose pads and said bridge are always made of rigid elements and as such susceptible to breakage or at least deformation. Disclosure of Invention Aim of the present invention is also to obviate the above-mentioned drawbacks. This and other aims are reached with the present innovation according to characteristics of the included claims, solving exposed problems by means of a non-deformable frame for spectacles, and in particular spectacles for children so obtained, comprising a connection element between the lens surrounds, composed from two bodies joined in a non-rigid way, of which one is inserted coaxiaUy to the other, and at least one torsion-bar preferably in steel, having the ends anchored to both the lens surrounds, and in which the nose pads are associated to the respective lens surrounds providing for the interposition of a helical spring. In such a way, through the notable creative contribution, the effect of which provides an immediate technical progress, different advantages are achieved, one being resistance to deformations and a considerable flexibility of the structure. In the second place, it is possible to confer to the spectacle a matchless wearability and comfort, as it adapts itself perfectly to the different conformations of the faces of the wearers. Not lastly, even the nose pads contribute to confer further characteristics of non-deformability to the structure, and furthermore the fact that the support is flexible allows it to also improve the degree of adaptability of the nose pads with respect to the anatomical structure of the nose. These and other advantages will appear from the specified successive preferential description of solutions realized with the help of the schematic diagrams included, the particulars of which are not to be considered limiting but only illustrative. Figure 1 represents a frontal view of a pair of spectacles provided with a frame of the non-deformable type. Figure 2 represents a sectional view of the connecting bridge between the lens surrounds, according to a section of A-A of Figure 1. Figure 3 represents a frontal view of a connecting bridge constituted by two associable elements. Figure 4 represents a plane view of the frame of the spectacle in the conditions of normal use. Figure 5 always represents a plane view of the frame of the spectacle but without the arms, in which at least one of the two lens surrounds has been subjected to a forced torsion with respect to the other, that visa versa remains in position. Also making reference to the figure it is revealed that a spectacle (A), is made from a frame ( 1) to which, with known hinges, are associated relative arms (2). In more detail, the frame (1), provides a torsion-bar (3) in steel, the ends of which are inserted to the inside of the opposite bearings (3¹) that thus cover these ends and are firmly fixed by these to the frame of the spectacle (4) in correspondence to the upper profile, nearly at the height of the eyebrow arch. Immediately below the said torsion-bar (3) a second means of connection is provided between the lens surrounds (4). Said connection means consists of two metallic elements, (5, 5'), respectively a left one and a right one, associated one to the other, the opposite ends of which are welded to the frame of the corresponding lens surrounds, on the outside. The conformation of each element (5', 5") is such as to essentially provide a first straight line followed by a gentle slightly accentuated curve, which has an angle of > 45°, to then continue with a second straight line. Such conformation is dictated mainly by the fact that, once the two elements (5', 5") are associated in contrapposition, they confer a classical arch shape to the bridge so obtained. A first element (5), provides on the side opposite to the point of fixing on the lens surround (4), the formation of an internally threaded blind hole, while the second element (5') fixed in contrapposition on the adjacent lens surround, provides for the corresponding male termination also threaded in the same manner as the inside of the hole made in element (5). In this case, the means of connection (5, 5') is previously assembled, screwing one metallic element into the other so as to allow each the possibility of a rotation equal to at least a quarter screw turn, allowing a complete movement of 180°, that corresponds to about 90° for each side. Once the elements (5', 5" ) are assembled, forming the bridge, this is traditionally fixed to the lens surrounds (4) of the said frame. In order to confer greater characteristics of non-deformability to the frame and greater wearability, even the nose pads (6) are associated to flexible supports. These include a curved support (6'), welded at one end to the lens frame, preferably on the internal border. The structure of said curved support (6') is made essentially of two parts, including respectively a first rigid line of anchorage to the frame of the spectacle, and a second (6'"), consisiting of a helical spring, the ends of which are welded on one side to the first rigid line, and on the other side to a means of hinging of the nose pad (6"). In Figure 5., a typical torsion movement, used on the frame of the spectacles made according to the teaching above described, is illustrated.

Claims

Claims 1. Non-deformable frame for spectacles, and in particular spectacles for children so obtained, characterised by the fact that they include a connecting element between the lens surrounds, consisiting of bodies joined in a non rigid manner, and at least one torsion-bar, having the ends anchored to each of the lens surrounds, and in which the nose pads are associated to the respective lens surrounds providing the interposition of a flexible body.

2. Frame according to claim 1., characterised by the fact that it provides a torsion-bar (3), preferably in steel, the ends of which are fixed firmly to the frame of the lens surrounds (4) in correspondence to the upper profile, and in which, right under said torsion bar (3), a second means of connection is provided between the lens surrounds (4).

3. Frame according to claims 1. and 2., characterised by the fact that a second means of connection is made from two metallic elements (5', 5"), respectively left and right, one being associated to the other, the opposite ends of which are welded to the frame of the corresponding lens surrounds, on the external side.

4. Frame according to claim 3., characterised by the fact that a first element (5), provides on the side opposite to the point of fixing on the lens surrounds (4), the formation of an internally threaded blind hole, while the second element (5') fixed in contraposition on the adjacent lens surround, provides the corresponding male termination also threaded in the same manner as the inside of the hole made in the element (5), to be so inserted into it. 5. Frame according to claims 3. and 4. characterized by the fact that the connection means (5,

5') are previously assembled, to then be fixed to fhe frame of the spectacle, screwing the metallic elements one to the other so as to allow each the possibility of a rotation equal to at least a quarter screw turn.

6. Frame according to the previous claims, characterized by the fact that the nose pads (6), are associated to flexible supports, obtained by a curved support (6'), that includes a first rigid line of anchorage to the frame of the spectacle, and a second (6'") made from a helical spring, the ends of which are welded on one side to the said first rigid line, and on the other to a hinging means of the nose pad (6").