FR2664990A1 - Improved sprung hinge for spectacles - Google Patents

Abstract

As subject matter, the invention relates to an improved sprung hinge for spectacles. The hinge is of the type comprising, at the end of a small bar, an elongate hollow body containing a springy (elastic) means, in this case a coil spring (5), lying between the head (8) of a screw, which passes axially through the spring, and a stop element capable of being blocked in the said body. The screw passes through the said stop element and is screwed into a first hinge element (20) which is fastened, in an articulated manner, to a second hinge element (23) fixed to the frame of the spectacles. The hinge is characterised in that the stop element comprises parts (12) capable of moving apart, by expansion, in an elastic manner, under the action of the spring (5) compressed by the screw. The expandable parts (12) are equipped with elements (14) capable of being lodged in a housing (15) provided in the said body.

Description

CELARNE ELASTIQUE Pl CIJLONNEE sas LUNE = The present invention has

object an elastic hinge

perfected for glasses.

  We already know an elastic hinge for glasses object of the Italian patent application born 41617 A / 90 of

  05/31/1990 by the same applicant, to which reference will be made.

  The hinge in question comprises, at the end of a bar, an elongated hollow body, having a planar end and containing a coil spring comprised between the head of an axis which passes through it axially and a stop element blocked in the

  same axis by means of an elastic ring of the circlip type.

  The axis passes through the stop element and engages in a first hinge element secured with articulation to a second hinge element, fixed to the front part of the spectacles, having a polygonal profile, one side of which rests on

the flat end of the hollow body.

  The elastic ring is suitably housed inside

  laughing of a bore made in the hollow body.

  The assembly of the hinge is carried out first by assembling its various elements and then by introducing these into the hollow body, making the elastic ring go out

lodge in said bore.

  While being optimal from the point of view of

  operation, said hinge is not free from incon-

  vénients, as regards the assembly, due mainly to difficulties of positioning and introduction of said ring

  elastic circlip type in its housing.

  The main object of the present invention is to develop an improved elastic hinge for glasses capable

  to eliminate the drawback observed in the known technique.

  Another object of the invention is to develop an improved hinge that can be assembled in a way

simple and fast.

  Yet another object of the invention is to develop an improved hinge which can be obtained at a low price.

  cost by means of the usual production facilities.

  2 - These aims, as well as others which will appear more clearly hereinafter, are achieved by means of an elastic hinge for spectacles, of the type comprising, at the end of a bar, an elongated hollow body containing an elastic means inserted between the head of an axis which passes axially through it and a stop element intended to be locked in this same body, said axis passing through said stop element in order to engage in a first hinge element subject, with articulation, to a second hinge element itself fixed to the frame of the glasses, said hinge being characterized in that said stop element comprises parts intended to move apart in an elastic manner, by expansion, under the action of said elastic means compressed by said axis, said parts being provided with means

  able to be introduced into a housing provided in said body.

  Other features and advantages will emerge more

  clearly from the following description of a form of

  embodiment, given here for information only and in no way limitative with reference to the accompanying drawings, in which: FIG. 1 is a view in longitudinal section of the hinge according to the invention; Figure 2 is an exploded view of the hinge of Figure 1; FIG. 3 is a view of the hinge according to the invention at the time when its pre-assembled parts are introduced at

inside the hollow body.

  According to the drawings, the elastic hinge perfection-

  born according to the invention comprises, at the end of a bar 1, an elongated hollow body 2 in the form of a parallelepiped and having a flat end face 3 at the level of which a

  cylindrical bore 4 which crosses it longitudinally.

  Inside said cylindrical bore 4, which has a flared mouth 4, is housed a coil spring 5 which surrounds the rod 6 with a screw 7 and which, by one of its ends, is in

  stop against the head 8 of this same screw.

  The other end of the screw 7 rests against an element of

  stop 9 with essentially cylindrical development.

  In particular, said stop element, advantageously made of plastic, has an intermediate cylindrical part 10 from which develop, on the side of the

  spring, 5 two semi-cylindrical sectors 12 of smaller diameter

  laughing, separated by a diametrical slot 11.

  These sectors 12 can suitably move away from each other by elastic deformation of their connection zone with

said intermediate part 10.

  Said spring 5 is supported on said sectors 12, and in particular on the corresponding parts of a frustoconical seat

  13 produced at the end of said sectors.

  Still at their end, said sectors 12 have circumferential projections 14 intended to be housed, by elastic expansion, in a groove 15 produced inside the bore 4.

  Said stop element 9 further comprises, on the op-

  placed on said sectors 12, a portion 16, of diameter smaller than that of the intermediate portion 10, crossed by a slot

diametral 17.

  A through hole 18 axially passes through the element 9 In this

  hole, engages the rod 6 of the screw 7, the end of which

  the insert is screwed into a tapped hole 19 of a first hinge element 20 which, being produced in the shape of a parallelepiped,

  is engaged between the walls of the slot 17 to then be in-

  product, with said element 9, inside the hollow body 2.

  Said first hinge element 20 protrudes from the hollow body 2 by a part 21 provided with a hole 22 allowing its articulated assembly with a second hinge element 23 fixed to the frame 26 of a pair of glasses, said element being essentially in shape fork and with holes 24 allowing the introduction

a hinge pin 25 with screws.

  The external profile of the rectangular fork of the second hinge element 23 has three sides, respectively 27, 4 - 28 and 29, one of which bears against the end face 3 of the

hollow body 2.

  The three sides 27, 28, 29 define three positions of stable equilibrium for the rotation of the bar 1, positions which can be taken by compression of the spring 5 following a traction effected by the first hinge element 20 and

then by screw 7.

  As regards the mounting of the hinge in question, the screw 7 is introduced inside the spring 5 and the element of

  stop 9 and, after passing through them, is screwed into the ta-

raudé 19.

  The screwing of the screw 7 causes the compression of the spring 5

  and the expansion of the sectors 12 of the stop element 9.

  After this assembly, the different elements are introduced

  inside the cylindrical bore 4 by compressing in a direction

  dial the two sectors 12, either manually or with a tool.

  This operation is also facilitated by the presence of

  the flare provided at the end 4 a of the bore 4.

  The stop element 9 is then made to slide inside the hole 4 until the circumferential projections 14, moving away, still under the action of the spring 5, go to lodge

  inside the groove 15 by blocking everything in place.

  At this point, it is obvious that the elastic hinge perfec-

  according to the invention can be assembled much more quickly.

  dement and easily compared to known types, being complete-

  ment without elastic locking ring.

  We can practically see that the perfect hinge

  tioned according to the invention fully achieves the envisaged goals.

  It goes without saying that the hinge thus designed is susceptible of numerous modifications and variants, all falling within the

same concept of invention.

  In practice, the materials used, provided they are compatible with the intended use, as well as the dimensions, may

  be any according to the requirements.

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Claims (6)

  1) Elastic hinge for glasses, of the type comprising, at the end of a bar (1), an elongated hollow body (2) containing an elastic means (5) inserted between the head (8) of a screw (7 ) which passes through it axially and a stop element (9) intended to be locked in this same body, said screw (7) passing through said stop element (9) and engaging in a first hinge element (20) secured, with articulation, to a second hinge element (23) fixed to the frame of the glasses, said hinge being characterized in that said stop element (9) comprises parts (12) intended to move apart in an elastic manner under the action of said elastic means (5) compressed by said screw (7), said parts (12) being provided with elements (14) capable of being introduced into a   housing (15) provided in said body.   2) elastic hinge according to claim 1, characterized in that said abutment element (9) is essentially cylindrical in development and that it has an intermediate cylindrical part (10) from which develop, separated by a diametrical slot (11), two semi-cylindrical sectors (12) being able to move apart by elastic deformation in their zone of   connection with said intermediate part.   3) elastic hinge according to claim 2, characterized in that said stop member (9) is made of plastic. 4) improved elastic hinge according to claim 2 or 3, characterized in that said sectors (12) of said stop member (9) have at their ends parts   (13) forming a support seat for said elastic means (5).   ) Elastic hinge according to any one of   previous claims, characterized in that said   elements capable of being introduced into a housing provided on said body are constituted by corresponding parts of circumferential projections (14) provided at the end of said semi-cylindrical sectors (12), said housing being constituted by a   groove (15) made in said body.   6) Elastic hinge according to any one of   previous claims, characterized in that said   abutment element (9) comprises, on the side opposite to said semi-cylindrical sectors (12), a part traversed by a diametrical slot (17), said abutment element comprising a through hole in which said screw (7) is inserted, the end of which threaded is screwed into a threaded hole (19) in the first hinge element (20), part of which is inserted into said slot diametral (17).   7) elastic hinge according to claim 6, characterized in that said part of the first hinge element (20) which is inserted into said slot (17) has an essentially parallelepiped shape. 8) Elastic hinge according to any one of   previous claims, characterized in that   the expansion of said semi-cylindrical sectors (12) is caused by the pushing of said elastic means (5) compressed after the screwing of said screw (7) in the first hinge element (20).   9) Elastic hinge according to any one of   previous claims, characterized in that said   groove is formed between the walls of a cylindrical bore (4) of said hollow body (2), said bore having one end flared entrance.