Patent Application
20090284710
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1. Field of the Invention
This invention relates to an elastic miniaturized hinge for a flexible temple element with an articulation trolley provided with at least a housing seat for a spring.
The invention finds particular even if not exclusive application in the field of the production of components for flex-temples for frames of glasses and in the metallic small items for related hinges.
2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98
The temples, on their ends and at the opposite side in respect to the terminations, are provided with associated elasticized hinges, a hinge being called a “flex”, which allows engagement with an elasticized function to a front part of the glasses, properly called a lug. There is a predominantly turnover or extra-opening of the temples function, that, in this way, is defined as a “flex-temple”, being obtained on both sides of the glasses and having the advantage to confer a greater fit. The glasses result in a more wearable and adaptable form for the different anatomical conformations of each person. Moreover, it has the value to favor an effective absorption action of accidental impacts, avoiding an excessive stress of both the otherwise utilizable hinges and of the corresponding temples placed on the sides of the glasses.
Today, the most spread elastic hinges look substantially complex, requiring excessive sizes in the components, which collides with the present tendency to minimize the sizes themselves in order to make the frame of the glasses more charming, with lower visual impact and lower weight.
It also happens that the required precision components are innumerable, and as a result, their assembly by the production unit, requires production time and costs.
The now-mentioned circumstances have therefore induced the companies of the sector to reach to the implementation of elastic hinges, which offer a refined functionality, though being more reduced in size and aiming, at the same time, to reduce the components, facilitating their assembly, and reducing the costs.
The research of size reduction produced a series of size clearances and physiological conditions, such as rotation clearances of the temples in the opened or closed position, during the extra-opening movement, and vertical translation clearances of the temples in any working position of the glasses.
FR2702573 (Chevassus), describes an elastic hinge. A box is included in it, inside of which a tie-rod is axially movable, one end of which is hingeable to the lug of the glasses, and one opposite end of which ends with a perpendicular section to form a shoulder. In this way, a tie-rod is obtained, inside the box, provided with a longitudinal seat which houses a compression spring, one end of which is placed in abutment with said shoulder, while the opposite end, is arranged in abutment with a second striker, obtained at the end of a guiding rod coaxially introduced in said spring. The guiding rod, on the opposite side, is provided with a particular wedge-shaped head, intended to be butted in a corresponding receptacle obtained by a second portion, which is longitudinally developed and integral with the tie-rod. This portion is provided along one side with a spike which, being protruding towards the intrados of the box, during the assembly, engages in one corresponding seat, realizing a stable constraint between the tie-rod and the box in order to prevent the extraction of said tie-rod.
IT1288611 (Montagner), is an elastic hinge for glasses temples, essentially comprising a box, being associated, when finished, to the temple by means of a tacking and preassembly, inside of which two springs are housed. The springs, on one side with their ends, are in abutment to the bottom of the box, and on the other side, the springs are arranged in abutment to the end of a tie-rod, to which they are arranged one for each side. The shape of the tie-rod is substantially “T” shaped provided at the opposite end with a convenient hole, being hingeable to a corresponding lug provided on the frame of the glasses.
EP0679920 (OBE-Werk), provides three solutions for elastic hinges. A first one is characterized by the presence of a tie-rod coaxial to a spring, placed axially with respect to a box opened along one side, on the end of said tie-rod means being ensured acting as rabbet for an end of a compression-spring. The opposed end of the aforementioned spring engages at a shoulder obtained inside of the box, in such a way that, during the application of the tie-rod in the room of the same, the spring is submitted to a precompression and held in this condition. A second provision consists in the providing the monolithic realization of the tie-rod and with a “L” shape, which, in the intermediate position, holds the related spring during the assembling in the obtained housing and similarly holds the related spring in a precompression condition. Finally, a third tie-rod solution is recalled, always of the monolithic type. The latter, apart from the traditional flat head of the hinge, provided with a related hole, provides a body, having a quadrilateral section, or longitudinally protruding shank ending with a transverse portion. Some particular springs are obtained perpendicularly developing on the sides, that is along the sides of said shank, and integral with the same, said springs being obtained from a plate whose shape looks like an undulated sequence.
The company Comotec, www.comotec.com proposes a hinge model called Optimum Flex, which suggests a box with a prolongation along one side to constitute a protrusion insinuated between the two walls of the lug joined to the front of the glasses. It looks like it is a device substantially conceived to avoid the torsional oscillations of the hinge in working conditions of the articulation.
It is therefore reasonable to consider known the elastic hinge that includes:
The described solutions, particularly with reference to corresponding articulation, have a series of clearances and physiological slacks, such as rotation clearances, e.g. in the opened or closed position, or during the extra-opening movement, as well as vertical translation clearances in any working position.
As a whole, from these introductive considerations, one can perceive how important it is to find alternative solutions.
Therefore, an aim of this invention is also to avoid the above-mentioned drawbacks.
This and other aims are achieved by the present invention according to the characteristics in the included claims, solving the abovementioned problems by means of an elastic miniaturized hinge for flex temples with a box provided with at least a guiding zone for the connection of the articulation to a seat joined to the front of the glasses. The hinge includes:
wherein, peripherally with respect to the opening of the housing obtained at the front end of the box, at least one guiding zone is obtained, said guiding zone consisting of a cheek of a protrusion longitudinally projected with respect to the box, where said cheek is parallel and orientated toward at least one of two lateral faces of the articulation. Furthermore, said protrusion is provided with a guiding seat with an opening along the front profile and longitudinally projected with respect to the sliding longitudinal axis of the articulation trolley.
In this way, by means of the considerable creative contribution which effect constitutes an immediate technical progress, different aims and advantages are achieved.
The connecting element that can be a screw, a pin, or a stud, is guided by the guiding zones/seats of the cheeks located on the box.
The guiding seats allow an easier insertion of the joining element in the system itself. For example, in the traditional system with a screw, its insertion results are very simplified.
It is possible to eliminate the seat that avoids the axial rotation of the articulation because this one is replaced by the guiding system.
There is greater resistance of the system in the closing, opening and extra-opening movement, as the system allows having the sliding elements guided in any position.
There is greater resistance to the side bendings for the same reasons of the previous point.
It is possible to apply the present invention on products with any size, even very large sizes, because, unlike the mechanisms at present on the market, increasing height of the product corresponds in the same extent to increasing the precision of the mechanism.
It is possible to avoid having to leave the articulation slide on a contacting surface, as sometimes at present one recurs to in order to contain the clearances, because the guiding system makes its realization superfluous.
It is possible to use the guiding zones as contact points to limit the strokes, both, the opening, the closing and the extra-opening strokes.
It is possible to use the guiding zones for the housing of springs, studs or related seats, in order to have a considerable reduction of the size of the hinge.
The guiding zones may neither be in contact with the articulation, e.g. obtaining four tongues on the external element, being it both the hinge, the lug, the temple or another one.
These and other advantages will appear from the following detailed description of a preferred embodiment with the aid of the enclosed schematic drawings whose embodiment details are not to be considered limitative but only illustrative.
A first embodiment of the elastic hinge (10a) (
The connection of the hinge (10a) to the lug (60) which is joined to the front of the glasses, is obtained by inserting between the two parallel walls (61, 62) of the lug (60). Both are provided with a corresponding hole (63), the forepart of the box (20) and specifically the two protrusions (23, 24) among which the articulation (300) is interposed, provide the screw connecting element (70) to be passing through the corresponding hole (63) of at least one of the parallel walls (61, 62) and therefore through the guiding seat (27) of at least one of the protrusions (23, 24) engaging the articulation (300) which is hinged in the through-hole (50).
Concerning the trolley (30) of the articulation (300) (
Operatively, the hinge (10a), when the flex temple is stimulated in an extra-opening condition, causes the articulation (300) to perform a longitudinal movement with respect to the box (20) held by the guiding zones consisting of the concurrence of internal cheeks (230, 240) and of the corresponding guiding seat (27) that controls the movement of the transverse screw (70) for the fixing to the lug (60) of the front portion.
In the embodiment of
Another variant of the hinge (10c) is represented by the embodiment of
| Number | Date | Country | Kind |
|---|---|---|---|
| TV2008A000072 | May 2008 | IT | national |
