Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C1/00—Assemblies of lenses with bridges or browbars
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/017—Head mounted
  • G02B27/0176—Head mounted characterised by mechanical features
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0149—Head-up displays characterised by mechanical features
  • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements
  • G02B2027/0156—Head-up displays characterised by mechanical features with movable elements with optionally usable elements
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/017—Head mounted
  • G02B2027/0178—Eyeglass type

Definitions

• the present invention relates generally to ophthalmic and / or sunglasses and more specifically relates to a frame for glasses with clipped lenses allowing rapid assembly or replacement of lenses, as well as a quick-mount lens for cooperating with such a frame.
• TECHNOLOGICAL BACKGROUND It is known that a pair of glasses consists of two corrective ophthalmic and / or solar lenses attached to a frame which is designed to be placed on the wearer's nose so as to properly position a lens in front of each eye. Usually, the lenses are permanently fixed to the frame during a so-called mounting operation. There are several ways to fit eyeglass lenses.
• Circular lens assemblies are thus known, in which, typically, the frame comprises circles inside which the peripheral edges of the lenses are embedded by their edge, after having been cut out to the corresponding shape. Also known are pierced lens assemblies using wire frames without circles, on which the lenses are fixed punctually by bolting.
• each lens has two laterally opposite through holes, one for fixing the corresponding end of the trigger guard and the other for the hinge of the branch associated with it. The fixing is then ensured by bolts or the like passing through the lens through the holes thus formed.
• the lenses are clipped ortho-axially: the frame has lugs which are elastically flexible ortho-axially, that is to say in the plane of the lens or in other words perpendicular to its axis, and which are capable to cooperate with notches made in the edge of the lens.
• the major drawback of this solution lies in the radial nature of the elastic pinching performed, which, in order to achieve effective fixing of the lens, must be supplemented by a partial strapping of the lens, which makes the whole frame relatively bulky and unsightly.
• Document US 3,471,222 EISLER describes half-moon glasses, the lenses of which are attached to the frame by receiving their lower edge in a corresponding groove in the partial circles of the frame, after crossing a hard end point.
• the pinching force exerted by the partial circles on the lens is essentially radial and not axial as stipulated in claim 1 of the present application.
• the frame thus proposed is unsightly and / or is reserved for half-moon glasses insofar as they do not lend themselves well to the mounting of lenses of larger size.
• US Pat. No. 3,709,587 describes a pair of glasses, the lenses of which are clipped onto the frame by means of protuberances formed at the periphery of the lenses and engaged tightly in corresponding housings of the frame. Two embodiments are envisaged.
• the frame In the first mode, illustrated by FIG. 1 of this document, the frame has its own cohesion, independent of the lenses, with horizontal beams connecting the trigger guard to the branches.
• each lens is attached to the corresponding beam by means of a protuberance formed in the lower part of each lens to be embedded in a corresponding housing of the beam.
• the embedding area is unique for each lens, which makes mounting inconvenient to perform and unreliable in particular due to lack of stability and rigidity.
• each lens is provided with two diametrically opposite lateral lugs, engaged in corresponding notches of the frame.
• the frame is made in three separate parts: a nasal bridge and two branches, without a circle or connecting beam between the bridge and the branches. The cohesion of the whole is ensured by the lenses which carry out by themselves the junction between the trigger guard and the branches.
• the object of the present invention is to propose an elegant mounting solution rapid spectacle lens, which offers both effective fixing of the lens on the frame and a small footprint allowing a sleek frame shape.
• a frame for glasses with clipped lenses comprising a facial frame provided with means for clipping at least one lens, a frame in which the means for clipping at least one lens are arranged to operate elastic pinching.
• the means for clipping at least one lens are arranged to operate a bidirectional elastic gripping of the lens, in directions that are both ortho-axial and axial of the lens. This produces a complete blocking of the lens with in particular a radial clearance take-up.
• the means for clipping at least one lens have at least one oblique contact surface to achieve, like a ramp surface, the bidirectional nature of the lens pinch.
• the means for clipping at least one lens comprise, in addition to the axial and possibly radial nipping, orthoradial blocking means of the lens. This prevents any inadvertent sliding of the lens on the frame and in particular the lens is locked in rotation in a predetermined angular position. The positioning of the lens therefore gains in precision, which is of particular interest when it comes to lenses with complex optical functions, such as personalized lenses and / or with progressive variation of power.
• the orthoradial locking means constitute an axial slide for the lens.
• the means for clipping at least one lens comprise at least one elastic clamp with at least three studs each forming a single-acting stop and arranged in the same horizontal plane to operate on the lens a distributed axial elastic pinching in at least three aligned support zones, with two lateral studs arranged to bear against the lens in the vicinity of its edge, on a certain side of it, and a central stud situated between the two lateral studs and arranged for take support on the other side of the lens.
• the means for clipping at least one lens comprise at least two elastic clamps arranged to operate on the lens two axial elastic pinches located in two pinch zones located in the vicinity of the edge of the lens.
• the facial reinforcement has a central nasal bridge and, on either side of said nasal bridge and connected by it, two horizontal beams which are generally aligned with each other and whose at least one is provided with said means for clipping at least one lens.
• the facial reinforcement with its two beams, its nose bridge and its means for clipping at least one lens, is produced in a single piece in the form of a continuous horizontal bar having a vertical central fold forming the bridge of the nose.
• the invention also relates to glasses comprising a frame incorporating one or more of the characteristics set out above.
• these glasses comprise at least one lens having orthoradial locking means with which the orthoradial locking means engage for form cooperation means for clipping at least one lens of the frame.
• the orthoradial locking means of the lens cooperate to slide with the slide of the frame.
• the means for clipping the frame are provided with an oblique ramp surface, the orthoradia blocking means!
• the glasses thus designed can be of the informative type, the frame then being provided with an active display device visible through the clipped lens.
• the rapid assembly, on demand, of corrective corrective lenses by the clipped fixing proposed. It is then possible to easily adapt the informative glasses to the view of the wearer and in particular to the correction of ametropia or presbyopia which it needs to see clear and sharp the image displayed by the active display device.
• FIG. 1 is an overall perspective view of a pair of glasses according to a first embodiment of the invention
• - Figure 2 is a detail view of Figure 1, showing on a smaller scale the lens attachment area
• - Figure 3 is a detail view of Figure 2 on a still smaller scale
• - Figure 4 is a plunging front view showing as in Figure 2, but disassembled, the lens and the part of the frame on which it is fixed
• - Figure 5 is a top view along arrow V of Figure 4
• - Figure 6 is a detailed perspective view similar to Figure 2, illustrating a second embodiment of the invention
• - Figure 7 is a top view along arrow VII of Figure 6
• - Figure 8 is a perspective view showing as in Figure 6, but disassembled, the lens and the part of the frame on which it is fixed
• - Figure 9 is a perspective view of a pair of informative glasses according to a third embodiment of the invention, in which the principle of fixing the lenses is similar to that of the second embodiment of Figures 6 to 8
• the glasses shown in FIG. 1 have a frame 1 on which are attached two lenses or glasses 3, 4.
• the frame 1 comprises on the one hand a facial frame 2 receiving the two lenses 3, 4 and on the other hand two branches 5, 6 articulated at the lateral ends of the facial frame 2.
• the two branches 5, 6 are conventionally intended to hang on or simply rest on the wearer's ears.
• the geometric center of the peripheral edge of each lens 3, 4 has been noted 102, 103. Let us consider a plane P (not shown) defined as being, ie the plane containing this peripheral edge if the latter is plane , or the median plane of this peripheral edge otherwise.
• This plane P substantially vertical when worn, is called in the context of the present application median plane of the lens or simply plane of the lens.
• An axis 00, 101 of each lens 3, 4 is then defined as being the axis perpendicular to the plane P and passing through the center 102, 103.
• the horizontal and the vertical are understood in a wearing configuration where the frame is installed on the nose and ears of the wearer, the two lenses 3, 4 being located generally in a vertical plane, while the axes 100, 101 of these lenses and the longitudinal directions of the branches 5, 6 are generally located in horizontal planes. As can be seen in FIG.
• the facial reinforcement 2 has in its central zone a bridge of the nasal seat 7 in the general shape of an inverted V intended to rest on the nose of the wearer and, symmetrically on either side of this nose bridge 7 and connected by it, two horizontal beams 8, 9 which are generally aligned with each other.
• the beams 8 , 9 of the facial reinforcement 2 have two horizontally bent external lateral ends 10, 11, called tenons, on which the two ear attachment branches 5, 6 are pivotally mounted around vertical axes. In the two examples illustrated by FIGS.
• the facial reinforcement 2 is in the form of a continuous horizontal bar, having a vertical central fold forming the nasal bridge 7 and on either side of this central fold , the two symmetrical beams 8, 9 aligned with each other horizontally and extending outwardly by the two tenons 10, 11.
• the beams 8, 9 have a substantially oval uniform section.
• the two lenses 3, 4 being arranged on either side of the trigger guard 7, each of the two beams 8, 9 is provided with means for fixing the lens 3, 4 which is associated with it.
• the fixing of each lens 3, 4 is, for its convenience and speed, of the clipped type. For this reason, in the context of the present application, the expression "means for clipping" is used to designate these means for rapid fixing of the lenses.
• each of the two horizontal beams 8, 9 of the frame 2 has a front receiving notch 12
• Each of the beams 8, 9 is, along this reception notch, longitudinally cambered to match the camber of the lens.
• the means for clipping the lens are arranged at the two lateral ends of this reception notch.
• the reception notch 12 has in fact two lateral ends 14, 15 which are arranged in undercut, so as to constitute by their shape and material, and with the substantially rigid bottom 13 of the reception notch 12, two elastic V-shaped clamps.
• These two clamps constitute in this case the means for clipping the corresponding lens 3, 4 and are for this purpose arranged to operate on the lens two axial elastic pinches located in two pinch zones located in the vicinity from the edge of the lens 3, 4 concerned. Thanks to their V shape, the two clamps thus formed adapt, by their degree, of opening, to the axial and radial dimensions of the lenses 3, 4. This V shape, and more precisely in this case the obliquity opposite ends clears 14, 15 of the receiving notch 12 relative to the axis of the lens concerned, also allows the clamp 13, 14, 15 to exercise, by its elastic closure and in the manner of a ramp oblique, a two-component pinch, axial and ortho-axial, as will be better explained in the following paragraph.
• this embodiment is particularly advantageous for its ease of manufacture and the sleek design which it allows, while fulfilling the triple function mentioned above.
• the means thus formed for clipping each lens 3, 4 are arranged to operate an elastic pinching of the lens in a generally axial direction of the lens, that is to say according to its thickness.
• these means for clipping the lenses 3, 4 have oblique contact surfaces to achieve, like ramp surfaces, a bidirectional elastic pinching of each lens, in both axial and orthoaxial directions of the lens. This achieves a complete blocking of each lens with in particular a backlash of the lens in its plane.
• the ortho-axial pinching operates in addition to the axial pinching in a direction substantially perpendicular to the axis 100, 101 of the lens 3, 4, that is to say in a direction generally situated in the plane of the lens 3, 4.
• the ortho-axial pinching is exerted horizontally along the width of each lens 3, 4.
• the means for clipping the lenses are exclusively constituted, for fixing a lens, two elastic clamps with localized pinching of the type described above, arranged in the same horizontal plane on the beams 8, 9. It is preferable to provide, for the robustness and the reliability of the fixing, that these clamps are not too close to each other.
• the width of the clamp 13, 14, 15, which here depends directly on that of the corresponding beam 8, 9, is d '' approximately 5 mm In general, it will be preferable to provide that the pinching zones extend over a width of at least 4 mm.
• the means for clipping the lenses 3, 4 further comprise orthoradial blocking means for each lens. In the example illustrated by FIGS. 1 to 5, these blocking means are constituted by the beams 8, 9 themselves, and more precisely by the parts of these beams which are adjacent to the ends 14, 15 of the notch d reception 12, as will be better understood on reading the following.
• Each lens 3, 4 itself has means for its orthoradial locking with which the orthoradial locking means for the frame 2 engage by form cooperation.
• the orthoradial locking means for each lens are produced under the shape of two similar notches 16, 17 laterally opposite on the same horizontal plane. These notches come, during assembly, in engagement with the corresponding part of the beams 8, 9 and have almost the same vertical width as this part to obtain a blockage with low clearance, or even almost zero. It is with these blocking means to complete the quick fixing by axial and radial pinching to prevent possible inadvertent sliding of the lens on the frame. These means in particular block the lens in rotation about its axis in a predetermined angular position. The positioning of the lens therefore gains in precision, which is of particular interest when it comes to lenses with complex optical functions, such as personalized lenses and / or with progressive variation of power.
• the notches 16, 17 of the lenses 3, 4 also have, in this case, a beveled bottom 18, 19 which cooperates after mounting with the oblique ends 14, 15 of the receiving notch 12 to compete, in the manner an oblique ramp, with double pinching to take up axial and ortho-axial play. It also favors, by a plan on plan contact, the stability of the assembly reduced to two pinching zones. Thanks to the purified structure thus conceived, it is possible to provide, as in the present case, that the facial frame 2, with its two beams, its nasal bridge, its bent ends and its means for clipping the lenses, is produced in a single monobloc piece in the form of a continuous horizontal bar having a vertical central fold forming the bridge of the nose 7.
• this reinforcing bar 2 is produced in a single piece coming from molded plastic material.
• a material offering sufficient overall rigidity to the frame to avoid its untimely deformation when worn, in particular bending, of the bar 2 in normal use, and a certain capacity of elastic deformation to allow the clipped encasement of the lenses. in the notches.
• a metallic facial frame 2 formed from a plastically deformable metal wire, bent to form the bridge of the nose and the bent ends.
• FIG. 6 to 8 there is shown a second embodiment of glasses according to the invention.
• the general architecture of the frame is similar to that of the frame 1 previously described with reference to FIG. 1.
• the two lenses being arranged on either side of the trigger guard 7, each of the two beams 8, 9 is provided with means for fixing the lens associated therewith.
• the fixing of each lens is, for its convenience and speed, of the clipped type.
• FIGs 6 to 8 only the right beam 8 has been shown with an associated lens 31.
• the rest of the general structure of the frame remains similar to that of Figure 1, with the two arms 5, 6 and the central trigger guard nasal 7 connecting the two beams 8, 9. Only the means for clipping the lenses on the beams 8, 9 differ from those of the first example previously described.
• the horizontal beam 8 of the frame 2 has a front receiving notch 22.
• Each of the beams 8, 9 is, along this receiving notch, longitudinally arched to match the camber of the lens.
• the means for clipping the lens are arranged on the one hand on the bottom 23 and on the other hand at the two lateral ends 24, 25 of this receiving notch.
• Two returns or retaining fingers 26, 27 are in fact formed at the lateral ends 24, 25 of the notch 22.
• the reception notch 22 has a bottom 23 which has a convex surface, with a central vertical stop 28 arranged to bear against the concave face of the lens 31, at a distance from its peripheral edge.
• the lateral returns 26, 27 and the central stop 28 of the receiving notch 22 are aligned horizontally and constitute by their arrangement and the elasticity of the material constituting the beam 8, three branches or pads of an elastic clamp .
• These three studs 26, 27, 28 each form a single-acting stop and are arranged to operate on the lens an axial elastic pinch distributed in at least three aligned support zones.
• aligned it is understood that the three studs and corresponding support zones are arranged in the same plane, which in this case is horizontal.
• this elastic shape memory of the beam generates an axial elastic pinching resulting from its sandwiching between, on the one hand, the lateral returns 26, 27 and, on the other hand, the central stop 28 of the bottom 23 of the reception notch.
• the two lateral studs are angularly distant from each other by at least 90. degrees with reference to the geometric center of the edge of the clipped lens.
• the means for clipping the lenses consist exclusively, for fixing a lens, by the elastic clamp with three aligned pads of the type described above. It is preferable to provide, for the same reasons as those mentioned above with respect to the first embodiment, that the lateral studs of this clamp, namely in this case the returns 26, 27 are angularly distant from one another.
• the means for clipping the lens 37 further comprises orthoradial locking means for each lens.
• these blocking means are constituted by axial ribs 29, 30 of the beam 8 formed in a horizontal plane at the lateral ends of the reception notch 22, between the bottom 23 and the returns 26, 27.
• the lens 31 itself has means for its orthoradial blocking with which the abovementioned orthoradial blocking means of the frame 2 engage, in form cooperation, namely the ribs 30.
• These orthoradial blocking means of the lens are here produced in the form of two similar notches 32, 33 laterally opposite on the same horizontal plane. These notches come, during assembly, in engagement with the corresponding rib 29, 30 of the beam 8 and have almost the same vertical width as this rib to obtain a blockage with low clearance, or even almost zero. It is with these blocking means to complete the quick fixing by axial pinching to prevent possible inadvertent sliding of the lens on the frame. These means in particular block the lens in rotation about its axis in a predetermined angular position. The positioning of the lens therefore gains in precision, which is of particular interest when it comes to lenses with complex optical functions, such as personalized lenses and / or with progressive variation of power.
• the informative glasses thus proposed comprise a frame 40 on which two lenses 41, 42 are attached.
• the frame 40 comprises on the one hand a facial frame 43 receiving the two lenses 41, 42 and on the other hand two arms 44, 45 articulated to the lateral ends of the facial frame 43.
• These branches are conventionally intended to hang on or simply bear on the wearer's ears.
• the facial frame 43 has in its central zone a nasal bridge 46 intended to bypass the wearer's nose and, symmetrically on either side of this nasal bridge 46 and connected by it, two horizontal beams 47, 48 which are globally aligned with each other.
• the facial reinforcement 43 is in the form of a continuous horizontal bar having a central fold forming the nasal bridge 46 and on either side of this central fold, the two beams 47, 48 aligned with each other horizontally.
• the beams 47, 48 here have a substantially square uniform section, blunt at its angles.
• the two beams 47, 48 and the nasal bridge 46 form a single piece in the form of a continuous horizontal bar having a vertical central fold forming the nasal bridge 46.
• this rebar is made in one piece from transparent molded plastic. We can for example use polymethyl methacrylate, polycarbonate, a polyester-polycarbonate copolymer or any other transparent thermoplastic material.
• Each of the beams 47, 48 of the frame contains an oblique mirror 49, 50, visible through the beam and the clipped lens, the active display function of which will be better explained later.
• the horizontal beams 47, 48 of the facial reinforcement 2 have two external lateral ends on which two horizontally bent end pieces 56, 57 are fitted on which the two atrial hooking branches 44, 45 are pivotally mounted around vertical axes.
• Each of the tips 56, 57 contains active display means, such as a backlit screen or a projector.
• These display means form with the oblique mirrors 49, 50 an active display device capable of being produced in several forms, as described for example in American patents US 6,091, 546 and US 6,023,372.
• the frame 40 also has in its central area, adjacent to the bridge 46, a nasal seat 51 arranged in the general shape of an inverted V capable of conforming to the shape of the wearer's nose.
• This nasal seat 51 is attached to the horizontal beams 47, 48 by means of two fixing lugs 52, 53 arranged in a vertical plane parallel to the beams 47, 48 and fixed to these beams by strapping rings 54, 55 fitted on the beams on either side of the trigger guard 46.
• the seat 51, the legs 52, 53 and the rings 54, 55 are made in one piece from polyamide (crystalline or amorphous), propionate, acetobotyrate, cellulose acetate, polycarbonate or polyester-polycarbonate copolymer.
• the two lenses 41, 42 being arranged on either side of the trigger guard 46, each of the two beams 47, 48 is provided with means for fixing the lens which is associated with it.
• the lenses 47, 48 are fixed so that the mirrors 49, 50 of the active display device are visible through the lower part of the lenses 41, 42. The lenses thus exert their optical correction function when the wearer looks at the information provided by the display device, inside the horizontal beams 47, 48.
• This constructive arrangement turns out to be particularly advantageous in the case of presbyopic patients, since it is then possible to mount on the frame 40 of the multifocal type lenses, for example bifocal or with progressive variation of power.
• the informative glasses thus provided, on demand, with multifocal lenses adapted to the ametropia and to the accommodative deficiency of the wearer then offer the latter optimum visual comfort, with a far clear vision and corrected to the good power by the part.
• the near vision is partially cleared on either side of the mirrors 49, 50 due to the transparency of the beams 47, 48.
• each lens 41, 42 is, for its convenience and speed, of the clipped type in an axial direction.
• the clipping means used in the illustrated example are similar to those proposed in the second embodiment previously described with reference to Figures 6 to 8.
• the frame 40 is provided with two clamps arranged on either side of the trigger guard 46 to each receive the corresponding lens 41, 42.
• each clamp is made up of three aligned studs able to grip the lens in a vice.
• each lens 42, 43 to two lateral support pads on the concave face of the lens, including an interior lateral pad 58, 60 and an exterior lateral pad 59, 61, and a central pad 62, 63 of support on the convex face of the lens.
• the internal lateral stud 58, 60 is formed on the nasal seat 51 and in this case came integrally with it.
• the external lateral stud 59, 61 is formed on the corresponding endpiece 56, 57 and in this case came integrally with it.
• the lateral studs extend in internal projection from the seat 51 and the end pieces 56, 57, parallel to the longitudinal direction of the beams 47, 48, and are arranged to bear against the convex face of the corresponding lens 41, 42, in the vicinity of its periphery.
• the central stud 62, 63 of each clamp is arranged to bear against the concave face of the lens 41, 42 concerned, at a distance from its periphery.
• each central stud 62, 63 is constituted by a curved projection of a strapping ring 64, 65 fitted on the horizontal beam 47, 48. This ring is produced with its projection forming a stud in a single piece of elastomer such as a silicone elastomer.
• the lateral studs 58, 59, 60, 61 and the central stud 62, 63 are aligned horizontally, parallel to the longitudinal direction of the beams 47, 48 and constitute by their arrangement and the elasticity of their constituent material and / or that beams 47, 48, three branches or studs of an elastic clamp to clip the corresponding lens.
• These three studs 58, 59, 62 and 60, 61 and 63 each form a single-acting stop and are arranged to operate on the lens an axial elastic nip distributed in at least three aligned support zones.
• aligned it is understood that the three studs and corresponding support zones are arranged in the same plane, which in this case is horizontal.
• the central and / or lateral studs have an axial elastic withdrawal capacity.
• the central pads 62, 63 are elastically compressible.
• the part of the beam 47, 48 concerned by the lens to be mounted is elastically deformed so as to reduce its camber and / or the central or lateral studs 58, 59, 60, 61, 62, 63 concerned are spread or compressed elastically in an axial direction to allow the reception of the lens in the clamp.
• the lens is held there by an axial elastic pinching resulting from its sandwiching between, on the one hand, the lateral pads 58, 59, 60, 61 and, on the other hand, the central pads 62, 63.
• the means for clipping the lens 37 further comprises orthoradial blocking means of each lens.
• these blocking means consist of ribs 66, 67, 68, 69 formed in a horizontal plane on the nasal base 51 and the end pieces 56, 57.
• the ribs 66, 68 of the nasal seat 51 thus extend between the interior studs 58, 60 on the one hand and the fixing lugs 52, 53 on the other hand.
• the ribs 67, 69 of the tips 56, 57 extend between the outer studs 59, 61 on the one hand and notch bottoms 70, 71 of the tips 56, 57 on the other.
• Each lens 41, 42 itself has means of its orthoradial blocking with which the abovementioned orthoradial blocking means of the frame 40 engage, by shape cooperation, namely the ribs 66, 67, 68, 69
• These orthoradial blocking means of the lens are produced here. in the form of two similar notches laterally opposite on the same horizontal plane.
• the ribs 66, 67, 68, 69 retract or compress elastically, opposite one another, to allow the notches of the lens to come, after crossing a hard point, in taken with the corresponding ribs 66, 67, 68, 69.
• the notches of the lens have almost the same vertical width as that of the ribs, this results in a blockage with little or even almost no play.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Health & Medical Sciences (AREA)
• Ophthalmology & Optometry (AREA)
• Eyeglasses (AREA)

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• 2003
  • 2003-10-02 FR FR0311532A patent/FR2860604B1/fr not_active Expired - Fee Related
• 2004
  • 2004-08-11 WO PCT/FR2004/002121 patent/WO2005036237A1/fr active Application Filing
  • 2004-08-11 EP EP04786293A patent/EP1668403A1/de not_active Withdrawn
  • 2004-08-11 CN CNB2004800286681A patent/CN100526938C/zh not_active Expired - Fee Related
  • 2004-08-11 JP JP2006530392A patent/JP2007507733A/ja active Pending
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  • 2004-08-11 CA CA002540872A patent/CA2540872A1/fr not_active Abandoned
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