FR2975791A1 - MOUNTING GLASSES WITHOUT SCREWS - Google Patents

Abstract

The present invention relates to an eyeglass frame comprising a front part (4) of a frame and two branches (5) of spectacles, one end of which splits into at least two blades (1a, 1b), the front part (4) of a frame having two hoops adapted to receive glasses (6) glasses, and two connecting elements (2) with a branch (5) of the telescope extending in a direction transverse to the plane defined by the front part (4) mount each strapping being split in a slit so as to allow engagement or disengagement of the spectacle lenses (6) from said frame front portion (4), said slot extending into the connecting member (2) of defining a lower part (2a) of connecting element and an upper part (2b) of connecting element, said lower and upper part (2a, 2b) of connecting element (2) being clamped between them to minus two blades (1a, 1b) of one of the branches (5) of spectacles, characterized in that the front part (4) of the bezel further comprises for each strapping a locking element (3) at the slot, said locking element (3) consisting in at least two superimposed levels of complementary patterns on either side of the slot and located substantially in the plane of the front portion (4) mount, which when nested together prevent relative movement of the lower and upper parts (2a, 2b) of the connecting element in said direction transverse to the plane defined by the front part (4) mounting.

Description

GENERAL TECHNICAL FIELD

The present invention relates to the field of eyewear 5 STATE OF THE ART

The eyeglasses or sunglasses that are usually found in the trade usually have a front frame, which houses glasses, and two branches that rest on the ears. In order to be able to store the glasses, it is necessary to provide a hinge for folding the branches. This hinge is most often a point of weakness of the glasses, by the presence of small elements such a mini-screw serving as an axis of rotation. For reasons of strength, but also of cost and aesthetics, many alternatives have been proposed to the ordinary hinge. European Patent Application EP1596242 proposes a spectacle frame requiring no other part than the front part of the frame and the two branches. The front part of the frame is slotted laterally. This slot makes it possible to "open" the straps by elasticity of the frame, in order to easily engage and disengage the glasses of spectacles, and extends to split also a "connecting element", which is a tab bent to lateral ends of the front frame part. As the name suggests, this piece can be assembled with the end of a branch. The two parts cooperate: the connecting element allows the pivoting mounting of the branch, and the branch allows the tight holding of the two parts of the connecting element (and therefore the frame) on either side of the slot that is, the locking of the glasses. To do this, the branch is divided into three parallel deformable blades whose two extremal blades will come to grip and therefore maintain joined the two parts separated by the slot. The rotation is around projections protruding from the connecting element. The third blade, the central blade, serves as "spring" of the branches and allows to naturally maintain the pair of glasses in the open position or in the closed position. This eyeglass frame of the state of the art however poses a problem: if the fact that the end branches securely grips the two parts of the frame separated by the slot prevents them from moving apart (that is, ie, prevents any relative displacement of the lower and upper parts in a direction substantially orthogonal to the plane defined by the branches when they are unfolded, in other words the "vertical" direction), there is much less blockage in case of relative displacement in a direction in the horizontal plane. For example, if a glass is strongly pressed down when the glasses are folded, as the branch connecting element (the split piece) has a bend almost at right angles to the plane formed by the front part of the glass. mounting, we obtain a relative longitudinal translation of the upper and lower parts (in other words a sliding in the direction of the slot). And since the blades of the branches are flexible relative to each other, nothing prevents this movement of the lower part relative to the upper part. Then subjected to shearing forces, the glass would break easily. It is imperative to protect a maximum of a spectacle lens, which is why the frames described in European patents EP1754097 and EP0863424 each propose in addition to the structure described above a locking ring. This is an additional piece that is threaded onto the connecting element to completely block any movement of the lower part relative to the upper part.

This piece brings satisfaction, but it would be desirable for the issues of strength, cost and aestheticism mentioned above to be able to do without, and while also keeping the frames of split frames that are the only solution to engage or disengage a glass of bezel without otherwise requiring additional room.

PRESENTATION OF THE INVENTION

According to a first aspect, the present invention thus relates to an eyeglass frame comprising a front part of a frame and two glasses branches, one end of which is divided into at least two blades, the front part of the frame having two straps able to receive spectacle lenses, and two connecting elements with a telescope branch extending in a direction transverse to the plane defined by the frame front part, each strapping being split in a slot so as to allow engagement or disengagement eyeglass lenses of said front frame portion, said slot extending into the connecting member so as to define a bottom portion of a connecting member and a top portion of the connecting member, said lower and upper portion of connecting element being sandwiched between the at least two blades of one of the glasses branches, characterized in that the front portion of the bezel further comprises for each strapping a locking member at the slot, said locking member consisting of at least two superposed levels of complementary patterns on either side of the slot and located substantially in the plane of the front part of the frame, which when nested together prevent a relative movement of the lower and upper portions of the connecting element in said transverse direction relative to the plane defined by the front frame portion.

According to other advantageous and nonlimiting features: at least one blade of a branch and the connecting element of the branch have a pair of complementary notches able to fit together; - On the one hand one of the blades of the branch and the lower part of the connecting element of the branch have a first pair of complementary notches able to engage, and on the other hand another blade of the branch and the upper part of the connection element of the branch have a second pair of complementary notches able to fit together; - The first pair of notches and the second pair of notches are not aligned, so that the opening and / or closing of the glasses branch causes (s) the relative deformation of the blades of the branch; said blades of the branch are twisted; - A bezel branch is divided into three blades including a central blade and two extremal blades, the opening and / or closing of a branch causing the elastic deformation of the central blade; - the two extremal blades of the telescope branch meet at their extremities; - The central blade of the glasses branch is inserted into a slot in the connecting element by which the branch is connected to the front frame; - a bezel branch is divided into two blades including a lower blade and an upper blade, said lower and upper blades intersecting so that the upper blade is connected to the lower part of connecting element and the lower blade is connected at the top of the connecting element; the lower and upper blades of the branch are placed in the crossed position by application of a mechanical stress, so that the lower and upper portions of the connecting element are clamped together because said lower and upper blades of the branch tend to to return to their original position by uncrossing; - The fact that said lower and upper blades of the branch tend to return to their original position causes a concavity of the branch, the opening and closing of the branch involving the reversal of the meaning of this concavity; for each branch, the upper blade and the lower part of the connecting element are monolithic, or the lower blade and the upper part of the connecting element are monolithic, so that the spectacle frame consists only of 'a piece. a strapping of the front part of the frame comprises a thinned portion situated under the glass; the locking element comprises a first level lower pattern, a first level top pattern, a second level lower pattern, a second level top pattern, the outline of the first level lower pattern substantially coinciding with the outline of the pattern. first level top, the contour of the second level lower pattern substantially coinciding with the contour of the second level top pattern, the first level lower pattern being substantially identical to the second level top pattern, and the second level lower pattern being substantially identical to the superior first level pattern; the two levels consist of two layers, and the lower pattern of one of the levels and the upper pattern of the other layer are substantially wave-shaped.

PRESENTATION OF FIGURES

Other features and advantages of the present invention will appear on reading the following description of a preferred embodiment. This description will be given with reference to the accompanying drawings in which: Figures 1 to 7 are views from different angles of all or part of a first embodiment of a spectacle frame according to the invention; Figures 8 to 15 are views from different angles of all or part of a second embodiment of an eyeglass frame according to the invention Figures 16 to 23 are views from different angles of all or part of a third embodiment of an eyeglass frame according to the invention FIGS. 23 to 30 are views from different angles of all or part of a fourth embodiment of an eyeglass frame according to the invention FIGS. 34 illustrate various possibilities of locking element in spectacle frames according to the invention. DETAILED DESCRIPTION

Principle of the invention With reference to the drawings, and in particular to FIG. 1, the invention relates to a spectacle frame. By this term refers to the entire frame of a pair of glasses adapted to support glasses. It will be understood that the invention relates to all types of spectacles, and in particular to both prescription glasses and sunglasses, the only difference being the nature of the lenses (corrective lenses, tinted lenses, progressive lenses, etc.). The eyeglass frame according to the invention comprises on the one hand a front part 4 of frame and on the other hand two branches 5 of glasses. The front part 4 corresponds to the part of the frame that receives the lenses 6 and lands on the nose. For this purpose it optionally comprises as shown in the figures a pair of wedges nose-rest which 15 do not hurt the nose of the wearer of glasses. The branches 5 as for them rest on the ears of the wearer of spectacles. To receive the two glasses 6, the front portion 4 has two hoops, which surround the periphery of the glasses 6 and lock. For example, if the front portion 4 is thicker than the glasses, it may include a groove of width equivalent to the thickness of the glasses. Alternatively, as can be seen in FIG. 2, if the front portion 4 is thinner than the lenses 6, it is on the contrary in the glasses that a groove can be made, the strapping being inserted into this groove The front portion 4 may even include a tab 412 (see FIG. 19) on all or part of the circumference of the strapping, fitting into a groove of the glass 6. To allow the engagement or disengagement of the 6 glasses, each strapping is split according to a slot as seen in Figure 2.

This slot is through, and substantially radial. By acting on the rigidity of the front portion 4, this slot can be widened, thereby increasing the diameter of the strapping, hence the mobility of the glass 6. The set of materials usually used in eyewear, such as metal, horn, shell, plastic, etc. are suitable in the vast majority of cases to achieve the front part 4 (except for example if the front end is too thick, so too rigid). For the connection between the front part 4 and the branches 5, the front part 4 has on each side a connection element 2. These two connection elements 2 extending in a direction transverse to the plane defined by the front part 4 of mount. Indeed, when the pair of glasses is worn (the branches 5 in the open position), the branches 5 extend on the sides of the face and are therefore substantially perpendicular to the front portion 4. The connecting elements 2 are intended to be in the axis of the branches 5 when they are open, as can be seen in FIG. 1. It will be understood that according to the shape of the face and according to aesthetic considerations, the connecting elements 2 and / or the branches 5 can do not be exactly perpendicular to the front, and form a slightly more open angle or a little more closed. By way of example, it will be assumed that this angle is orthogonal in the remainder of the present description (with reference to the reference visible in FIG. 3, it will be conventionally considered that the front part 4 extends in the plane xOy, and that the connecting elements 2 and the branches 5 when in the open position extend in the plane yOz), but the person skilled in the art will keep in mind that it suffices that the two connecting elements 2 extend according to a transverse direction (that is to say substantially non-collinear) relative to the plane defined by the front portion 4 of mount. By convention also, when we speak of "length", "width" and "thickness" of a blade, we designate the dimensions of the blade respectively in the directions Oz, Oy and Ox when the branch 5 is open. As can be seen in the figures, the position of the slot in each strapping is chosen such that it extends into the connecting element 2 so as to define a lower part 2a of connection element and a upper part 2b of connecting element, that is to say in particular in the upper outer corner of the front part 4. In other words, the opening / closing of the strapping involves the opening / closing of the connecting element 2. According to the embodiments, the connecting element 2 can be designed so that its two halves 2a, 2b are joined when the strapping is closed (see FIG. 12 for example), or else in all cases spaced apart (see Figure 16 for example).

It is understood that if the two halves 2a, 2b of the connecting element 2 are prevented from moving apart, the opening of the straps is prevented. Any drop of glasses 6 becomes impossible. For this, one chooses branches 5 whose end is divided into at least two blades 1a, 1b. The blades 1a, 1b may in particular be in a material similar to (or not) that of the front portion 4 (metal, plastic, horn, etc.) and thus have a certain flexibility. It is therefore slightly twisted relative to each other (rotation at their base around the axis Oy), but the thickness of the branches 5 that it is almost impossible to spread the blades 1 a, 1 b. In other words, if any attempt is made to remove them, a constraint (represented by the vectors to and b in Figure 1) reciprocal tends to bring the blades 1 a, 1 b. Any element inserted in force between the blades 1 a, 1 b is therefore subjected to a compressive force (or rather "expansion prevention") in the direction Oy. That is why in the frame according to the invention the parts lower and upper 2a, 2b of connecting element 2 are clamped between the at least two blades 1a, 1b of one of the branches 5 glasses. We will return later on the various embodiments of this "clasping", but it will be understood that the blades 1a, 1b are placed on either side of the lower and upper portions 2a, 2b so that any spacing according to Oy of the lower and upper parts 2a, 2b mechanically drives a spacing along Oy blades 1a, 1b, and inversely, an ever closer to Oy blades 1a, 1b causes a rapprochement of the lower and upper portions 2a, 2b. In other words, the outer faces of the lower and upper portions 2a, 2b are in abutment with the inner faces of the blades 1a and 1b. And since structurally a stress appears when one tries to spread the blades 1 a, 1 b, the latter thus prevent any separation of the lower and upper parts 2a, 2b when the branches 5 are in place, they are open, closed, or even in an intermediate position (since the axis of rotation of the hinge, Oy, coincides with the direction of the stress applied to the lower and upper parts 2a, 2b). Note further that any relative movement of the blades 1 a, 1 b substantially along the axis of the branch 5 (for example Oz when the branch 5 is open) is naturally almost impossible, unless a blade 1 has , 1 b does not bend. This would indeed be a shortening or an elongation of the blade, but as in the previous case the blades resist such deformation inducing a reciprocal constraint. Thus, by the connection between the branches 5 and the connecting elements 2 (more precisely respectively between the blade 1a and the lower part 2a, and between the blade 1b and the upper part 2b), another direction is obtained according to which the relative displacement of the lower and upper parts 2a, 2b is prevented. Still with reference to Figure 3, it is the Oz direction when the branch 5 is open, the Ox direction when closed, and a component of the two when in an intermediate position. It is always a direction orthogonal or substantially orthogonal to the first blocking direction, Oy.

Thus, the cooperation between the branches 5 and the connecting elements 2 prevents any relative displacement of the two parts of the straps in two substantially orthogonal directions (which can not be collinear and therefore form a "blocking plane"), but not according to a third direction that corresponds to the vector product of the first two (a direction both orthogonal to the first two). This direction of "non-blocking", mentioned in the introduction corresponds to the direction Oy "Oz = Ox when the branch 5 is in the open position, and Ox" Oy = Oz when the branch is in the closed position. It is in the latter case that there is a problem, since a relative displacement of the lower and upper parts according to Oz involves a shear of the glass 6 mounted in the strapping at the slot of the strapping. Thus, if the pair of glasses in the closed position placed in the pocket receives a blow on Oz, the energy of the blow is transmitted integrally to the glass 6 in the form of shear stress. By the lever arm, if the blow is worn for example at the bottom of the glass 6, the breakage is almost assured. The mount according to the invention provides a solution to this problem through an element ensuring a permanent locking of any relative movement of the lower and upper parts 2a, 2b, and regardless of the position of the branches 5, and without additional parts. For this, the front portion 4 of the bezel further comprises for each strapping a locking member 3 at the slot.

This locking element 3 can be seen in the numerous figures, both in the open position and in the closed position, and particularly sees its structure in FIG. 2. It is in fact a particular section of the slot opening the strapping, and doing it not straight as in the previous art, but curved and especially different on two levels. The locking element 3 therefore consists of at least two superimposed levels of complementary patterns 311, 312, 321, 322 on either side of the slot and situated substantially in the plane of the front part 4 of the frame, which when they are nested together prevent a relative displacement of the lower and upper portions 2a, 2b of the connecting element in said transverse direction relative to the plane defined by the front portion 4 of mounting (that is to say, the direction Oz) . By "pattern" will be understood a shape defined by a particular plot of a section of the slot (a plot defines a pair of patterns, an upper pattern and a lower pattern, separated by the cut and therefore naturally complementary: in effect means that the cut is quasi-linear, and therefore that there is no particular removal of material at the level of the slot, so that in every point of the cut there is a substantial coincidence between the lower pattern and the pattern higher, hence "complementary" patterns on both sides of the slot) with respect to a median slot plane (xOz), and by "superimposed levels" it will be understood that the pattern is not constant when we move in the front part 4 in the direction Oz, and that it takes at least two different traces. In other words, there are at least two sections in a plane parallel to xOy in the thickness of the front portion 4 according to which the slot is different, these two different paths defining the two levels of patterns (one pair of patterns per level). Indeed, in known frames of the state of the art, as explained the slot is straight, that is to say just in accordance with the median plane (xOz), and for any cut in the thickness of the front part of mounting the outline of the cut is the same: a straight cut along Ox. There is only one level, and no blocking effect at the slot.

In most of the illustrated examples of frames according to the invention, there are exactly two levels, and we pass abruptly from first to second: the two levels here consist of two distinct layers, each of these layers extending substantially over half the thickness of the front portion 4 of mount. Alternatively, there may be a continuous variation from a first extremal level to a second extremal level. There are then no physically distinct layers, but virtually an infinity of superimposed levels. This case will be described in more detail below, but for the remainder of the present description, it will be considered by way of example that the two levels of patterns are two layers, but the person skilled in the art will understand that the invention is not not limited to this embodiment. In particular, in the case of two layers, there are found as explained two pairs of patterns, that is to say a lower pattern of first layer 311, a higher pattern of first layer 321, a lower pattern of second layer 312 and an upper pattern of second layer 322. The contour of the lower level first pattern 311 then coincides substantially with the contour of the first level top pattern 321, as well as the contour of the second level lower pattern 321 with the outline of the second higher pattern. level 322. This structure in two levels that on the one hand the patterns 311 and 322, and secondly 312 and 321, have facing parts, and therefore bearing surfaces substantially in the plane formed by the part 4. In other words, the patterns 311 and 322 prevent, by contact, a relative displacement of the lower and upper portions 2a, 2b (and thus of the two half of the strapping) according to the vector -i, the patterns 312 and 3 21 prevent by contact a relative movement of the lower and upper parts 2a, 2b (and therefore the two half of the strapping) according to the vector + z.

The locking element 3 thus prevents any relative displacement of the lower and upper parts 2a, 2b along the axis Oz, even when the branches 5 are in the closed position. In the remainder of the description, reference will be made to advantageous features that the locking elements 3 may exhibit.

First Embodiment A first particularly advantageous embodiment is shown in FIGS. 1 to 7. The various advantageous embodiments that will be successively described have all the characteristics presented above, and are distinguished in particular by their aesthetics and advantages. mechanical devices such as having open / closed positions of bistable branches, or having manufacturing facilities. Those skilled in the art will understand that the invention is not limited to any of these advantageous embodiments, and will adapt to many other models.

As can be seen in FIG. 5, in this first embodiment there are three distinct parts: the front part 4 and the two branches 5. The interlocking between the branches 5 and the connection elements is done by means of complementary notches adapted to fit: advantageously on the one hand one of the blades 1a, 1b (it will be named for convenience lower blade 1a) of the branch 5 and the lower part 2a have a first pair of complementary notches suitable for s nesting, and secondly the other blades 1a, 1b (it will be named for convenience upper blade 1b) of the branch 5 and the upper part 2b of the connecting member 2 have a second pair of complementary notches suitable for fitting. Notches adapted to fit together include, as seen in the figures, a cutout on the upper half (for the lower blade 1a and the upper part 2b) or on the lower half (for the upper blade 1b). and the lower part 2a) so that the cuts are all substantially in the direction Oy (to make the axis of rotation), facing outwardly of the connecting member 2 and inwards of the blades 1 a, 1b (see FIGS. 5 and 6), so as to allow the coupling element 2 to be gripped by the blades 1a, 1b. If there is a space (or other blade) between thin blades 1a and 1b, the cuts may be unequal in size (and extend over more or less than half of the element) , or at the extreme concern only the connecting element 2, the cut being as deep as the width of a thin blade 1 a, 1 b: the latter is inserted over its entire width in the cut. Although this is a special case, it will be understood that this case remains a case of "complementary pairs of notches", since the axis can be defined. This case will be discussed for the second embodiment.

If it is natural to align the two pairs of notches previously described to make a common axis of rotation, it is expected in the first embodiment to just not respect this alignment. Thus, the opening and / or closing of the eyeglass branch 5 causes the relative deformation of the blades 1a, 1b of the branch 5. More precisely, as can be seen particularly in FIG. 6, the fact that the two pairs of notches are not aligned there is "two axes of rotation" between the leg 5 and the front portion 4. These two axes of rotation being fixed, the opening / closing of the branch 5 corresponds to a rotation about a virtual axis equidistant from them both, this virtual axis being located at the intersection between the connecting element 2 and the median plane between the two blades 1 a, 1 b (which corresponds substantially to the plane that must be the rest of the branch 5). And move from the open position to the closed position of the branch 5 causes a twist / curvature of the lower blade 1 has relative to the upper blade 1b. In other words, the blades 1a, 1b are substantially aligned when the leg 5 is open, and form views from above a "Y" when the leg 5 is closed (see Figure 7). Note further that the opening / closing branches 5 in such a configuration involves the variation of the length of the blades 1a, 1b, which is difficult, but can be done by slight bending of the blade. Advantageously, the lengths of the blades 1a, 1b are chosen such that the position "at rest" (that is to say the position in which there is no stress on the length of the blades 1a, 1 b) corresponds to the closed position of the branch 5. This is therefore a minimum potential. When it comes to open the branch 5, the upper blade 1b (in the configuration shown in Figures 6 and 7) is contracted, while the lower blade 1 has undergone rather a stretch. The elongation / shortening of the blades 1a, 1b being almost impossible, the upper blade 1b hinges. The potential energy of the branch 5 then increases. In the open position, as seen in Figure 7, it exceeds the plane formed by the alignment of the two pairs of notches (which corresponds to a maximum of potential energy). The open position is therefore stable. But as soon as we start to fold a branch, we will redécasser this maximum of potential energy, and the branch will continue to fold itself to the end, that is to say the position of lowest stress. In the case of metal branches, it is nevertheless necessary to force to bend the blades, so particularly advantageously, as seen in Figures 1 to 7, the blades 1 a, 1 b of the branch 5 are twisted, so that the blade 1b can bend in more than one direction. The mounting of the mount is simple and is as shown in Figure 5: after installing the glasses 6 in the strapping, for each branch 5 is engaged first the notch of the lower blade 1 has in the notch of the lower part 2a of the connecting element 2, then slightly twisting the branch 5 downwards to pass the upper branch 1b above the upper part 2b, and nibble their respective notches.

Second embodiment

A second particularly advantageous embodiment is shown in FIGS. 8 to 15, of which FIGS. 13 and 14-15 show two slight variations. In this embodiment, as can be seen for example in FIG. 8, a telescope branch 5 is divided into three blades 1a, 1b, 12 including a central blade 12 and two end blades 1a, 1b ( respectively lower and upper), the opening and / or closure of a branch causing the elastic deformation of the central blade 12. This deformation is particularly illustrated in Figure 9: the central blade 12 is advantageously inserted in a slot provided in the connecting element 2 by which the branch 5 is connected to the front portion 4 mounting. In contrast to the previous embodiment, the two pairs of notches through which the end plates 1a, 1b and the connecting element 2 engage are aligned. We have a unique axis of rotation. However, as can be seen in FIG. 10, the slot in the connecting element is not aligned with this axis of rotation. The blade 12 which inserts into it thus undergoes, as in the previous case, a deformation with respect to the extremal blades 1 a, 1 b, unlike the fact that it is movable in translation inside the slot, and therefore that the deformation does not consist in a bending, but simply a curvature at its base (compare the two branches 5 of the frame of Figure 10). When the branch is in the open position, all the blades 1a, 1b, 12 are substantially parallel. This is again a minimum of potential. By folding the branch 5, the deformation of the central branch 12 is progressively increased, and a maximum of potential is reached when the branch 5 is orthogonal to the connection element 2. The energy decreases again at the very end of the folding movement, so that the closed position is also stable.

As can be seen in FIG. 11, which represents in detail the branch 5, the two end plates 1a, 1b advantageously meet at their ends via a rod 51. Indeed, this embodiment does not imply any relative deformation. of the lower extremal blade 1 with respect to the upper extremal blade 1b. These two blades 1a, 1b have the same movement, so it is interesting to secure them to prevent any unplanned deformation.

In the example shown, the notches on the blades 1a and 1b are a bit special: instead of splitting the two blades 1a, 1b on their inner half as was the case in the first embodiment, two recesses 231 and 232 are made in the thickness of the blades 1a, 1b. In other words, instead of making a cut (ie a recess over the entire thickness of the blade), two half-cuts are made (ie two recesses not vis-à-vis on half the thickness of the blade). Thus, seen from above the blades 1a, 1b have an "S" profile. The lower and upper portions 2a, 2b then have, as can be seen in FIG. 12, lugs 221 and 222 complementary to the recesses 231 and 232. The notch around which the rotation is made is defined by the interstice between the lugs 221 and 222. It will therefore be understood that even if they are less visible than in the previous embodiment, each leg 5 and the associated connecting element 2 have two pairs of complementary notches able to engage. The use of "half-notches" provides an aesthetically interesting effect of total complementarity of the branch 5 and its connecting element. As seen in Figure 8, when the branch 5 is unfolded the two parts fully integrate.

Advantageously, a portion 233 of the central blade 12 is partially hollowed so as to cooperate with a hollow portion 223 common to the lower and upper portions 2a, 2b of the connecting element 2, and the central blade 12 being finished by a pin 234. inserted into said slot 224 formed in the connecting element 2. All this makes it possible, on the one hand, for the central blade 12 to be integrated in both the connecting element 2 and the end plates 1a, 1b, and allowing on the other hand to prevent with the pin 234 that the central blade 12 out of the hole 224 if it was forced on the branches 5 (by opening too much). A first slight variant of this embodiment is shown in FIG. 13. As can be seen, the extremal blades 1a and 1b are not of equal width. Unlike the case described above, the branches 5 and the connecting elements 2 are not symmetrical. At the level of the lower junction (lower part 2a / lower extremal blade 1 a), it can be seen that the two "half-cuts" and the S-profile are not found, but a cut-out throughout the thickness as in the notches of the first embodiment.

If one of the extremal blades (here the lower blade 1 a) is really thinner than the other (here the upper blade 1 b), it is possible to physically separate this blade at its base (ie the notch s' extends over the entire width of the branch 5), the blade is no longer connected to the rest of the branch that via the rod 51 which in the drawings connects the ends of the two end plates 1 a, 1 b. This configuration is advantageous since on the one hand the central blade 12 is less opposite and can be deformed freely, and on the other hand the two parts 2a, 2b of the connecting element 2 are securely held together while having an internal space (defined by the slots which make the end of the blade 12 is disjoint extremal blades 1 a, 1 b) which is not a closed space in the plane formed by the branch 5. In other words, this internal space "opens" on the outside of the branch 5. This makes it easier to assemble the branch 5 to the connecting element 2 that in the previous case where a fairly complex movement of insertion of the connecting element 2 between one of the end blades 1a, 1b and the central blade 12 followed by a rotational movement was necessary. In the second slight variant, shown in Figures 14 and 15, the central blade 12 is in fact an extremal blade. As seen, the blades 1a and 1b are in fact a single block. The central blade 12 is part of a lateral arm that is just folded against the rest of the branch 5. A little material is however removed at the head 233, 234 of the central blade so that it can "cross" the rest of the branch 5. Compared to the basic version of the second embodiment of the invention, this configuration is more aesthetic because there are no more visible slots separating the blades 1a , 1 b 12, since the central blade 12 is hidden behind the rest of the branch 5.

Third embodiment

A third particularly advantageous embodiment is shown in FIGS. 16 to 23.

In this embodiment, the branch 5 of the telescope is divided into two blades 1a, 1b. And as seen for example in Figure 16, the lower and upper blades 1a, 1b cross to reverse. It is then the upper blade 1b which is connected to the lower part 2a of connecting element and the lower blade 1a which is connected to the upper part 2b of connection element 2. This crossover is however not natural: the branches 5 are made so that at rest the blades 1a, 1b are substantially parallel. It is therefore necessary to have a mechanical constraint to put them in a crossed position, a constraint which causes the blades 1 a, 1 b to tend to uncross by generating a mutual constraint: the upper blade 1b (whose end is in the "lower" position ) causes an upward constraint, and the lower blade 1a (whose end is in the "upper" position) induces a downward constraint (represented respectively by the vectors a and b in Fig. 22). In other words, even if the role of the blades 1 a, 1 b is reversed, any element inserted in force between them is therefore subjected, as in the other embodiments, to a compressive force along the direction Oy. why the lower and upper parts 2a, 2b of connecting element 2 are similarly sandwiched between the at least two blades 1a, 1b of one of the branches 5 of glasses.

This embodiment makes it particularly advantageous thanks to this cross a frame in a single piece. As can be seen in FIG. 17, it is possible for each branch 5 to be the upper blade 1b and the lower part 2a of connecting element, or the lower blade 1a and the upper part 2b of the element of connection (2), be monolithic. In this case, in Figure 17, it is the upper part 2b and the lower blade 1a which are monolithic. Crossing reconnects the other two (the upper blade 19 1b and the lower part 2a). It is always possible to have three distinct parts (the front part 4 and the two branches 5) and two interlocking branches (upper and lower part), but the frame in one piece has many advantages, both on the financial plan only on the aesthetic level. Note that although one of the blades 1a, 1b and one of the parts 2a, 2b of the connecting element are one, it will always be considered that the lower and upper parts 2a, 2b are sandwiched between the two blades 1 a, 1 b. During manufacture, such a monobloc frame is advantageously produced flat. It is therefore necessary to twist the one-piece blade with the connecting element 2 so that it extends well in a direction transverse to the plane defined by the front part 4 mount. The assembly is done as shown in Figures 20 and 21 by the interlocking of the end of the blade (here 1b) free in an associated receptacle on the free part (here 2a) of the connecting element. This interlocking is in force (trajectory J). Depending on the flexibility of the blades 1 a, 1 b the fact that they tend to return to their initial position can advantageously cause a concavity of the branch 5, clearly visible in Figure 23. According to the position of the branch 5 relative to the plane generated by the connecting element 2 of the branch 5, we see that two concavity directions are possible: concavity "facing inwards" (the center of curvature is located outside the frame, open position of the branches 5 in Figure 23 above) or concavity "facing inwards" (the center of curvature is located inside the frame, closed position of the branches 5 in Figure 23 below). And the opening and closing of the branch 5 implies the crossing of this plane generated by the connecting element 2 of the branch 5, that is to say a reversal of the meaning of this concavity. This makes it possible to have, as in the other embodiments, stable open and closed positions: the inversion of the concavity (i.e. passing through a zero concavity) is a maximum of potential.

Fourth embodiment

A fourth particularly advantageous embodiment is shown in FIGS. 24 to 30. In contrast to the previously described embodiments in which three or even one piece were required, five are required here. However, as seen in Figure 24, the blades 1a, 1b are hidden and no cut is visible on the branches 5. It is aesthetically the most successful model, with all the advantages described above .

As can be seen particularly in FIG. 26, a tongue 10 is inserted into a cavity provided for this purpose in the branch 5. It is this tongue 10 which has the two blades 1a and 1b which clasp as explained previously the two parts 2a, 2b of the connecting element. Note further that the tongue 10 has at the end opposite the blades 1a, 1b a kind of hook which will be forced into the branch 5. As can be seen in Figure 27 it is the only attachment point between the branch 5 and the tongue 10. The latter is chosen material and thickness such that it can be deformed so that its end having the blades 1 a, 1 b may slightly deviate from the rest of the branch 5. This is a deformation similar to that which could have the central blade 12 relative to the extremal blades 1 a, 1 b in the second embodiment. And as is still seen in FIG. 27, the notches on the lower and upper portions 2a, 2b of the connecting element 2 are placed in such a way that the lug defined by the connecting element portion located beyond the notch is substantially longer than wide (in other words that the notch is not too close to the end of the connecting element 2). Thus the section of this lug according to the xOz plane is an elongated rectangle, which is inserted into the gap between the branch 5 and the tongue 10. During an opening / closing of the branch 5, in the reference frame of the plug this rectangular spigot pivots on itself. And as can be seen, by turning it comes to bear both on the inner faces of the limb 5 and the tongue 10 by applying forces represented by the vectors a and b in Figure 27. This forces the tongue 10 to to deform: it is necessary to bring energy to open or close the branch 5, as in other embodiments. The two stable positions are the positions separated by 90 ° in which one of the sides of the rectangular pin is parallel to the axis of the branch 5. It is indeed the open and closed positions. It may be possible to reduce the force to be provided to move from one position to another by slightly filing the angles of this lug. Figures 28 to 30 show a slight variant of this fourth embodiment. Here the front portion 4 can be covered with a shell 7. This shell 7 can be changed by the user to change according to his desires the appearance of his eyeglass frame. It also makes it possible to hide the locking elements 3 and the connecting elements 2, so it is possible to have no visible cutout on the entire spectacle frame. The front portion 4 of mount can be chosen the simplest and cheapest possible, since it is hidden by the shell 7. As can be seen in Figure 29, the shell 7 advantageously comprises connecting element covers 2 also extending in a direction transverse to the plane defined by the front portion 4 mounting. As can be seen in FIG. 30, if the front portion 4 is chosen to be relatively flexible, the connecting elements tend to deform outwards. The shell 7 prevents this deformation by generating the reciprocal constraints at, b and é which allow the locking of the front portion 4 in the shell 7. The front portion 4 is as "clipped" in the shell 7. In addition, the blades 1 a, 1 b branches 5 further improve this blocking of the front portion 4 in the shell 7.

Complements on the locking element As explained above, the locking element 3 is an element ensuring that there can be no relative movement of the two halves of the strapping in the direction Oz. It consists of at least two superimposed levels of complementary patterns 311, 312, 321, 322 on either side of the slot and located substantially in the plane of the front portion 4 of the frame. The locking element 3 is particularly visible in Figures 2, 3, 4, 18, 25 and 31 to 34. The invention is not limited to any particular pattern geometry. It is only desirable that there are facing surfaces sufficiently wide enough for there to be blocking effect. Each pair of facing surfaces further prevents only displacement in one direction of movement. For example, considering FIG. 2, supposing that the second lower layer pattern 312 is suppressed (such a case would not be in accordance with the invention, since one of the lower and higher units of a level would no longer be complementary to either side of the slot: there would be a vacuum), the upper pattern of first layer 321 no longer have support surface facing. There would then be blockage between the lower pattern of first layer 311 and the upper pattern of second layer 322: a push on the bottom of the glass 6 (corresponding to a movement along + z of the lower part 2a of the 2 relative to the upper part 2b) would be prevented, unlike a pull on the bottom of the glass 6 (corresponding to a displacement -i of the lower part 2a of the connecting member 2 relative to the upper part 2b). When the pattern 312 is present, the displacement is prevented in both directions. Since we have a complementary pair of distinct patterns on two levels, we see that there is existence of two pairs of bearing surfaces facing preventing movement in both directions. However, the two pairs of facing surfaces may be unbalanced and have substantially different areas. To avoid this risk, as shown in all the figures, advantageously the lower level first pattern 311 is substantially identical to the second level top pattern 322, and the second level lower pattern 312 is substantially identical to the first level top pattern 321. In other words, the locking element 3 has a central symmetry.

Advantageously, to maximize the bearing surfaces, one can further choose that the patterns are made so that their median plane includes the center of symmetry.

An advantageous form of pattern, resembling a "wave" is repeated in many figures. By waveform is meant any form of bump substantially curved, in other words laterally deviating. This form has a hook function, and as can be seen in FIG. 4, it can indifferently be oriented to the left as to the right. With respect to a pattern that would be symmetrical with respect to a plane parallel to the yOz plane, the waveform requires a certain force to be engaged (along a path J visible for example in FIG. 25), and holds in place better. The waveform, when combined with some thinning 421, 424, 423 of the frame front portion 4 and in particular straps (see FIGS. 17 and 18), further enhances the lock effect imparted by the 3. Indeed, when the glass 6 is in place, it comes to press the entire periphery and the two halves of the strapping naturally tend to deviate. In the absence of thinning, this constraint is of vertical axis (according to Oy). And, as can be seen for example in FIG. 18, a thinning 424 of the strapping located under the glass 6 (and advantageously on the outer side of the glass 6, that is to say on the side of the connecting element 2 ) locally facilitates its deformation, which changes the orientation of the stress which tends to separate the two halves of the strapping on both sides of the slot: represented by the vectors at and b in Figure 18, this constraint s' away from the vertical, and is then substantially orthogonal to the main direction of the wave-shaped pattern 311 of the locking member.

If the pattern 311 is a wave this time turned outward (see Figure 31), one can achieve the same result by slimming rather the part of the strapping of the inner side of the glass 6. The locking element 3 in two layers as Most of the figures can be seen mainly by chemical cutting. The fact of not having two layers but of continuously varying from one level of pattern to another level (as seen in FIGS. 32 to 34) allows the use of other manufacturing techniques. For example, the bevel cut as seen in Figure 32 is achievable by mechanical milling. In this configuration, the bearing surfaces are oblique, and not vertical as in the case of two layers, but as the two parts 2a, 2b of the connection element are kept in contact, this does not in any way diminish the effectiveness of Locking the locking element 3.

In the embodiment shown in Figure 33, there is a bevel cut, but whose angle varies continuously. There are no longer two distinct bevels as in the case of Figure 32. This makes possible a laser cut in a single pass: as seen in Figure 34, it is sufficient to move the laser sideways while simultaneously doing a rotational movement around the Ox axis. This simple and fast process advantageously makes it possible to generate a particularly effective locking element 3 since it respects (if the speed of rotation of the laser is constant) the central symmetry conditions mentioned above.

Claims (15)

REVENDICATIONS1. Eyeglass frame comprising a front part (4) of frames and two branches (5) of spectacles, one end of which is divided into at least two blades (1a, 1b), the front part (4) of frames having two suitable straps receiving glasses (6) glasses, and two connecting elements (2) with a branch (5) of the telescope extending in a direction transverse to the plane defined by the front portion (4) mount, each strapping being slotted in a slot so as to allow engagement or disengagement of the glasses (6) of spectacles from said front frame part (4), said slot extending in the connecting element (2) so as to define a lower part (2a) of connecting element and an upper part (2b) of connecting element, said lower and upper part (2a, 2b) of connecting element (2) being sandwiched between the at least two blades (1 a, 1 b) of one of the branches (5) of the eyewear characterized in that the front portion (4) of the bezel further comprises for each strapping a locking member (3) at the slot, said locking member (3) consisting of at least two superposed levels of patterns ( 311, 312, 321, 322) on either side of the slot and situated substantially in the plane of the front part (4) of the frame, which when they are nested together prevent a relative movement of the lower and upper parts. (2a, 2b) of the connecting element in said direction transverse to the plane defined by the front part (4) mounting. 2. Eyeglass frame according to claim 1, wherein at least one blade (1a, 1b) of a limb (5) and the connecting element (2) of the limb (5) have a pair of notches. complementary fit to fit. Eyeglass frame according to claim 2, in which on the one hand one of the blades (1a, 1b) of the branch (5) and the lower part (2a) of the connecting element (2) of the limb (5) have a first pair of complementary notches adapted to fit together, and secondly another of the blades (1a, 1b) of the limb (5) and the upper part (2b) of the connecting element (2) of the branch (5) have a second pair of complementary notches able to engage. Eyeglass frame according to claim 3, in which the first pair of notches and the second pair of notches are not aligned, such that the opening and / or closing of the eyeglass limb (5) causes (s) the relative deformation of the blades (1 a, 1 b) of the branch (5). 5. spectacle frame according to claim 4, wherein said blades (1a, 1b) of the branch (5) are twisted. 6. Eyeglass frame according to one of claims 1 to 3, wherein a branch (5) of the bezel is divided into three blades (1a, 1b, 12) including a central blade (12) and two end blades ( 1 a, 1 b), the opening and / or closing of a branch causing the elastic deformation of the central blade (12). 7. spectacle frame according to claim 6, wherein the two end blades (1a, 1b) of the branch (5) of the window meet at their ends. 8. Eyeglass frame according to one of claims 6 or 7, wherein the central blade (12) of the eyeglass arm (5) is inserted into a slot in the connecting element (2) through which the branch (5) is connected to the front part (4) of the frame. 9. spectacle frame according to one of claims 1 or 2, wherein a branch (5) of the bezel is divided into two blades (1a, 1b) including a lower blade (la) and an upper blade (Ib) said lower and upper blades (1a, 1b) intersecting so that the upper blade (1b) is connected to the lower part (2a) of connecting element and the lower blade (1a) is connected at the upper part (2b) of connecting element (2). Eyeglass frame according to claim 9, in which the lower and upper blades (1a, 1b) of the limb (5) are placed in a crossed position by applying a mechanical constraint, so that the lower parts and upper (2a, 2b) connecting members are clamped because said lower and upper blades (1a and 1b) of the leg (5) tend to return to their original position by uncrossing. 11. Eyeglass frame according to claim 10, wherein the fact that said lower and upper blades (1a and 1b) of the branch (5) tend to return to their initial position causes concavity of the branch (5), the opening and closing of the branch (5) involving the reversal of the meaning of this concavity. 12. spectacle frame according to one of claims 10 or 11, wherein for each branch (5) is the upper blade (1b) and the lower part (2a) connecting element are monolithic or the lower blade (1 a) and the upper part (2b) connecting element (2) are monolithic, so that the spectacle frame consists of a single piece. 13. Eyeglass frame according to one of claims 1 to 12, wherein a strapping of the front portion (4) frame includes a thinned portion (424) located under the glass (6). Eyeglass frame according to one of claims 1 to 13, wherein the locking element (3) comprises a lower level first pattern (311), a first level top pattern (321), a lower level pattern second level (312), a second level top pattern (322), the outline of the first level lower pattern (311) substantially coinciding with the outline of the first level top pattern (321), the outline of the second level lower pattern (321) substantially coinciding with the contour of the second level top pattern (322), the first level lower pattern (311) being substantially identical to the second level top pattern (322), and the second level lower pattern (312). being substantially identical to the first level top pattern (321). The spectacle frame according to claim 14, wherein the two levels consist of two layers, and the lower pattern of one of the levels (311) and the upper pattern of the other layer (322) have substantially a shape of wave.