1) FIELD OF TECHNIQUE INVENTION REFERS TO

This invention refers to eyeglasses' flex, and according to international classification (IPC), it has been classified as: G02 C 5/22

2) CONDITION OF THE TECHNIQUE

The inventor is familiar with two hinge systems for glasses that are completely integrated into the temple and that have no parts which protrude from the frontal part, and have the possibility of vertical movement of the temple.

The first one is BL 2003 A 00011 owned by SKEYOTTICA, and the inventor is Kacavenda Milan, deposited in Italy. The system has two independent mechanisms with springs and the same rotation center and vertical motion of the temple depends on the predetermined interspace between the housing in the frontal part and mechanism carrier as well as between the distances of two mechanisms.

The second system is the hinge applied on glasses "PHILIP STARCK" which uses cable (rope) to compel two squared areas to fit mutually. Bad side is that the end of the temple and the end of the frontal part always have to be the same and that limits the design.

3) TECHNICAL ISSUES

Technical issue is to create the glasses for athletes that have capability of vertical movement of the temple in relation to the frontal part with all the positions of the temple. This characteristic is necessary to guarantee greater safety of the end user during incident situations when it is possible to have temple braking and face and eyes injuries...

Situations like such and more dangerous situations during explosion of an Air-bag when we inevitably have hit in the face and therefore the eyeglasses. Explosion of the side and front air-bags simultaneously is particularly dangerous. The next issue is to drastically cut down on costs in assembly phase which is one of the greater problems in the eyeglasses industry. Subsequent issue is to make a flex whose parts do not ask for application of expensive and complicated machines and whose price is significantly below all flexes known to us. The next issue is to avoid any kind of finishing in final assembly such as oiling, adjustment of irregular fitting of the temple onto the frontal part, adjustment of the temples in closed position, etc. The next issue is to make eyeglasses with strong flex mechanism, such that the whole mechanism has no parts that protrude from the frontal part and from the temple. The next issue is to enable eyeglasses manufacturers that cannot weld or glue efficiently, to create such a flex so that all work is minimized to material deduction, not adding like welding. The next issue is to avoid the need for heating any part of the glasses, because such flexes are inapplicable for many materials used for glasses manufacturing, such as carbon, titanium, magnesium...

Because of all the above and everything that comes out from the deeper analysis, the inventor of this flex set himself a task to create such a flex that will simultaneously eliminate all of the above mentioned disadvantages.

4) REPRESENTATION OF THE INVENTION ESSENCE

The essence of the invention is to execute the connective element which is connected to the tension spring with one end, and with the other end it is connected to the frontal part. The other part of the spring is connected to the temple. The temple contains housing that enables longitudinal movement of the outer element, and impedes unwanted rotation of the temple in relation to the connective element.

Bearing in mind that it is also necessary to have vertical movement of the temple for safety reasons, in the frontal part a housing in the shape of letter "V" is made, and in the connective element a canal is made, in which the screw that connects outer element and the frontal part, during vertical movement, will be able to move freely; considering that every deviation of screw axis which connects the spring with the temple and the axis of the screw that connects outer element with the frontal part causes tension of the spring which means that the spring always regains that described distance between the screw to the smallest possible, and in our case until the face part of the temple and frontal part collide and find support on both sides of the longitudinal screw axis around which the temple rotates when it is closed or opened. In the same manner, the temple must have two supports above and below spring axis meaning that the temple, in any position, will have the possibility of elastic movement into all positions and all of this together makes an elastic hinge with circular movement. This characteristic is fundamental for safety of the end user in incidental situations such as sport incidents, traffic incidents, especially during incidents involving air-bag explosions.

An important goal of the invention is to enable application of this hinge onto various materials without any heating in any phase.

5) SHORT DESCRIPTION OF THE SKETCH

Pic 1: All constituents in spatial view are shown

1. Connective element

2. Spring

3. Housing in the temple

4. Housing in the frontal part

5. Temple

6. Frontal part

Pic 2: Positions of the temple are shown, in relation to the frontal part at times when the temple is closed, opened and at extra opening position.

Pic 3: Configuration of the elements is shown at every phase of the assembly and how the parts are assembled into the temple and final assembly of the temple to the frontal part.

Pic 4: Configuration and position of the elements is shown at phases when the temple has vertical movement.

Pic 5: Shows version in which the temple has an extension which covers the housing in frontal part. 6) DETAILED DESCRIPTION OF THE INVENTION

Elastic hinge with circular movement consists of connective element (1), tension spring (2), screw that screws into the temple (22), screw (61) which screws into the end of frontal part (6), the housing (3) in the temple (5) and the housing (4) in the ending of the frontal part (6).

A housing (3) that is made in the temple (5), with its shape enables longitudinal movement of the connective element (1) and at the same time disables unwanted movement of the connective element (1) in the housing (3) of the temple (5), rotation along axis. The housing (3) made in the temple (5) is longer than the connective element (1), because during the assembly phase it is necessary for connective element (1) to have the possibility of movement in the housing (3) in the temple (5) until the other end of the spring (23) which is not connected to the connective element (1) is positioned in such a way that it can, without any tension of the spring (2), be assembled into the hole (51) drilled in the temple (5) and secured with the screw (22). The screw (22) goes through the hole (51) in the temple (5) and through the end of the spring (23) with purpose to block the movement of one end of the spring (23) in the hole (51) made in the temple (5). During assembly of the mechanism, the connective element (1), spring (2) in the housing (3) of the temples (5), the spring (2) is not tensed and has shorter length in this phase of the assembly than in any other phase of assembly or work.

Spring (2) is a tension spring and it consists of two ends bent in the shape of "U" letter (21, 23), which serve so that the spring, on one side of its end, can be affixed to the connective element (1) in such a manner that the screw (121) goes through the hole (12) and through the end of the spring (21). The spring (2) is affixed to the temple (5) via its other end (23) in such a manner that a screw (22) goes through previously drilled hole (51) in the temple (5) and thereby goes through the end of the spring (23).

The assembly of the spring (2) into the temple (5) is performed so that the spring (2) together with the connective element (1) is pushed into the housing (3) of the temple (5) until the end of the spring (23) is in position where the hole (51) and the end of the spring (23) correlate in such way that the screw (22) goes through the hole (51), and then through the end of the spring (23), and in such way that the spring (2) is not tensed at all. The connective element (1) and the spring (2) are connected before the assembly of this mechanism into the temple (5) in such way that the screw (121) goes through the hole (12) and the end of the spring (21). During assembly phase of connective element (1) and the spring (2) is not tensed.

After fixation of the spring end (23) in the temple (5), the spring (2) is tensioned in such a position where it will remain until the assembly of the connective element (1), for fmalization of the frontal part (6), in such a way that the screw (61) will go through the hole (62), and then through the canal (F) made in the connective element (1)·

Tensioning of the spring is done in such a way that a certain flexible material, like nylon (N) is threaded through the canal (F) in the connective element (1) before the connective element (1) is pushed into the housing (3) of the temple (5) so that the nylon stays outside the temple (5). This is necessary because the connective element (1) enters with its whole length into the housing (3) so that the spring (2) could be assembled into the temple (5), without tensioning of the spring (2). After affixation of spring end (23) with the screw (22) by passing through the hole (51) nylon (N) is dragged in direction of spring tensioning. Connective element (1) is dragged by nylon (N) until the hole (11) comes out from the temple (5) and enables the blockage (I) to go through the hole (11) and in such way disables return of connective element (1) into the housing (3) under pressure of the spring (2).

The assembly of the connective element (1) and frontal part end (6) is done in such a way that connective element (1) is positioned into the housing (4) and by wriggling the screw (61) through the hole (62) and canal (F) and by additional tightening of the screw (61) prevents falling out of the screw (61) and assembly is done without tensioning of the spring (2) in this phase of the assembly.

Final assembly of the temple (5) onto the frontal part (6) is done by removing the blockage (I) which gives the temple (5) and frontal part (6) under the power of spring (2) tendency of collision and mutual convergence and therefore going back to the position where the spring (2) has the least tension.

Connective element (1) has in its composition a canal (F), blockage hole (11), hole (12) for spring (2) fixation and a slit (10) into which the spring (2) is being lodged. The canal (F) is wide minimally feasible more than thickness of screw (61) body and has the same width along total length in order to enable unhindered moving of the screw (61) body during flex work phase when the temple (5) has vertical moving and when connective element (1) holds the position in relation to the screw (61) under certain angle depending on the force which caused vertical moving of the temple (5) in relation to the frontal part (6). This moving is fundamental for athletic glasses in order to prevent injuries during incidents.

The connective element (1) is made in a way that the outer shape is such that a housing (3) can be made in the temple (5) which will have minimal gap in relation to the outer shape of the connective element (1), so during work phase it will serve as axial sliding guide along which the temple will move axially. Minimal gap between the housing (3) and connective element serves to avoid unwanted radial moving of the temple (5) in relation to the connective element (1). An important characteristic of the connective element (1) is that, the outer shape which slides axially in the housing

(3) during work phase is at the same time a part that has bigger or the same dimensions like the part in which the canal (F) is made, so as during assembly phase the whole connective element (1) could pass through the housing (3) because it is necessary for connective element (1) in combination with the spring (2) by this axial moving in the housing (3) comes to position where it will be able to fixate beside the spring (23), screw (22) passing through the hole (51) without tensioning of the spring. Having in mind that the hole in the housing (3) is "blind" and that it is a tension spring (2), the only way is to fix the spring (2) not tensed.

The temple (5) has capability of such elastic moving in all positions during closing and opening of the temple (5) as well as in position of extra opening, therefore has the capability of circular moving of 360° in relation to the frontal part. This is very important in case the glasses undergo two hits simultaneously, from different directions like it would happen during explosion of two air-bags or during fall of the bicyclist, etc.

The housing (4) in the frontal part (6), except already in technique of the known elements such as hole for the screw (61), the area over which the temple moves from the position when it is closed, to the position when it is open and to extra opening, end stop of temple opening also has specially made housing in the shape of letter "V" that enables vertical moving of the temple (5). The side of the angle of this housing determines the capability of vertical course of the connective element (1) because these ends serve also serve as end stops of vertical moving of the connective element (1), and by that of the temple (5) as well.

Applicant:

Kacavenda Milenko

Signature of Kacavenda Milenko