ELASTIC YIELDING METHOD OF THE ARM IN SPECTACLE FRAMES

Abstract: Elastic yielding method of the arm in spectacle frames and respective frame, comprising a spectacle frame (A) with relative lateral extensions (A') so as to allow articulate connection of the spectacle arms (C), in which said extensions (A') has an encasing seat open in head end, the arms (C) has an end connection (B) with an inside transversal slot (3), this one being connectable by way of a connection loop hooking spring (1) comprising a hooking end (1') and a counterhooking propping end (1''), the first being internally transversally inserted onto said slot of end part of the arm (3) while the other being propped encased onto said extension (2).

Description: Elastic yielding method of the arm in spectacle frames. The following invention relates to an Elastic yielding method of the arm in spectacle frames. The innovation finds particular and convenient application in spectacle frames in the aim of elastic yielding of the relative arms both during the use of the spectacles and when the arms are returned to their place. In the present state of the art there is a plurality of devices that allow the elastic yielding of the arm. These are divided substantially into three types: - device for elastic yielding which also constitutes the hinges of the arm of the spectacle frame, - arms provided by traditional hinges and separate devices for elastic yielding and finally, - arms provided likewise by known hinge using simple elastic parts interposed between the elements that constitute the rod of the arm, particularly the one found in the plastic rod, (to see the italian patent application 83501 A/83 in the name of the same applicant, file on 15.11.1983 entitled "Flexible spectacle arm whose lenght can be regulated with incorporated hinge and relative frame and spectacles") . This solution substantially incorporate in the arm the hinge whose hinging pin is connected by elastic traction spring means to the end of the same. The disadvantages according to the above solutions consist in that nearly all the devices of elastic yielding, particularly those provided by distinctive hinge group, involve the use of different elements, often complex, of difficult embodiment considering the particularity of the same and besides of noteable cost. Furthermore, the breakage even only of one element involves the substitution of the whole arm. Another disadvantage lies in that often when the spectacles are not used and the arms are not regularly closed, the projection of these creates an incorrect position that may ruin the structure of the spectacles. The aim of the following invention is to obviate the above-mentioned disadvantages. The following invention as claimed in the appending claims remedies the problem providing a spectacle frame with relative lateral extensions so as to allow articulate connection of the spectacle arms, in which said extensions have an encasing seat open in head end, the arms have an end connection with an inside transversal slot, this one being connectable by way of a connection loop hooking, spring comprising a hooking end and a counterhooking propping end, the first being internally transversally inserted onto the end part of the arm while the other being propped encased onto said extension. The advantages obtained by these solutions consist essentially in the se plification and reduction of the number of elements increasing the proficiency of the elasticity characteristics and facilitating the putting on of the- spectacles and the closure of the arms. Finally the solution enables an easy substitution of the deteriorated elastic spring and respectively of the arm. One of the inventor's preferable solutions of embodiment is clearly shown with the aid of related drawings whose particulars of embodiment are not to be seen as limitative but only illustrative. Figure 1 represents a front schematic view of a spectacle frame; figure 2 represents a plan view of the spectacle frame as shown in figure 1 representing the yielding-hinging system of the arm; figure 3 represents an enlarged plan section view of the. arm's hinge with spectacle frame; figure 4 represents a lateral view. The above-mentioned figure disclose a spectacle frame (A) provided by lateral extentions (A 1 ) suitable for the relative arm (C). The arm (C) comprises a metallic end connecting part (B) in a parallelepiped form in which laterally and on the inside direction a transversal slot (3). The slot (3) in the arm (B) is formed in proximity to the respective end edge that terminates ortogonally (4). On the inside extentions of the spectacle's frame whose form is also parallelepiped (A 1 ), a similar slot or prop seat is made (2). A loop hooking spring (1) is ' conformed in such a way that the hooking end (1') is inserted in the slot (3) of the arm (C). while the other counterhookin end (1") is encased in the respective extension (A 1 ), with his extremity (1") abuting to prop in said prop seat slot (2). The counterhooking spring end is encased in the extension (A*) nearly in contact with the lateral walls, being returned on itself completely a "U" allowing the end proppind in the slot (2). Said spectacle frame extensions (A 1 ) has a part of the respective extremity inner surface asported to allow the hooked extremitty (B) of the respective arm (C) to rotate in inside direction. Effecting a light pressure on the arm (C) towards the outside, the flextion and stretching of the spring (1) is determined whereas the arm is freely rotated in inside direction because the hooking end (1') of the spring (1) is inserted in the end groove (3) . Naturally the other particulars of embodiment can vary without them altering the invention's field of protection as claimed in the characteristics of the following claims.

Claims: CLAIMS 1. Elastic yielding method of the arm in spectacle frames and respective frame, comprising a spectacle frame (A) with relative lateral extensions (A') so as to allow articulate connection of the spectacle arms (C) , characterised in that said extensions (A') has an encasing seat open in head end, the arms (C) has an end connection (B) with an inside transversal slot (3), this ones being connectable by way of a connection loop hooking spring (1) comprising a hooking end (!') and a counterhooking propping end (1"), the first being internally transversally inserted onto said slot of end part of the arm (3) while the other being propped encased onto said extension (2). . Method and frame as claimed in claim 1. characterised in that said hooking end (1') and a counterhooking propping end (1") of the connection loop hooking spring (1) are shaped in opposed direction ("S" shape). 3. Method and frame as claimed in claims 1 and 2, characterised in that said counterhooking propping end (1") of the connection loop hooking spring (1) is "U" shaped with one extermity conceived to abut in a respective inside propping seat (2) of said spectacle frame extensions (A 1 ), where this countrrhook is encaseable, the other spring extremity being hookeable with the arm (B); 4. Method and frame as claimed in the previous claims characterised in that at the end (B) of the arm (C) a tooth is formed (4) to allow the clapping of the end (1') of the flexion spring (1) and to realize a head end abutment. 5. Method and frame as claimed in the previous claims characterised in that said spectacle frame extensions (A 1 ) has a part of the respective extremity inner surface asported to allow the hooked extremity (B) of the respective arm (C) to rotate in inside direction. 6. Spectacles provided by a frame and arms as claimed in each of the previous claims.

Inventors: CURTO CATERINO, LONGO GIANANTONIO, CURTO, CATERINO, LONGO, GIANANTONIO
Applicants: CURTO & LONGO FAOMS SNC
Application year: 1987
Main classification: G02C5
IPC codes: G02C5