WO2011107410A1

WO2011107410A1 - Eyeglasses

Info

Publication number: WO2011107410A1
Application number: PCT/EP2011/052875
Authority: WO
Inventors: Martin Koberg
Original assignee: Martin Koberg
Priority date: 2010-03-01
Filing date: 2011-02-28
Publication date: 2011-09-09
Also published as: DE102011000032A1

Abstract

The invention relates to eyeglasses comprising several eyeglass parts, in particular lenses (2), arms (3), a bridge (4), a lens frame, decorative elements (5) or the like. In an advantageous development, it is proposed that at least two eyeglass parts are or can be connected to each other, in particular in a releasable manner, by means of a plug coupling (6), wherein at least one eyeglass part on at least one attachment area has a pair of spring tongues (11), which are spaced apart from each other, particularly in parallel, and which, in the area of their free long end, have a projection (17) directed away from the adjacent spring tongue (11), wherein releasable connection to another eyeglass part is permitted directly or indirectly by at least one or more through-openings (19) being provided on the other eyeglass part, and wherein, in the unloaded state of the pair of spring tongues (11), the maximum distance between the outer surfaces, directed away from each other, of the two projections (17) is greater than a width of the though-opening (19).

Description

glasses

The present invention relates to a pair of spectacles comprising a plurality of spectacle parts, such as spectacle lenses, spectacle arms, a spectacle bridge, a lens surround, decorative elements or the like. In this case, the term includes spectacle lenses according to the usual usage of spectacle lenses made of any suitable material, such as preferably glass or plastic.

Many different types of spectacles are known in the prior art, which u. a. also in the so-called. Montur, d. H. in terms of addition to the eyeglass lenses existing frame parts differ. For example, eyeglasses are known in which the lenses are completely or partially enclosed on their circumference in a frame and on the other hand, glasses without lens frame, in which the temples more or less directly with the lenses and these with each other with a so-called.

Glasses bridge can be connected. Since glasses on the one hand can be exposed to considerable stress in their use, but on the other hand value is placed on a low weight and an attractive appearance, the parts of the glasses, from which a pair of glasses is composed, reliable and space-saving connected. For this purpose, various techniques are known. Among other things, lenses in a z. B. only half-sided glass enclosure by means of a thread-like clamping element fixed. The eyeglass temple are conventionally fixed in the region of a joint, which allows the folding of the glasses, by means of fine screws on a mounted on the lens frame part. Such fasteners often require special tools and craftsmanship or require for the disassembly and assembly of the glasses, for example. For replacement or repair work, an undesirable effort, the wearer often has to resort to a replacement on a spare glasses. Against this background, the object of the present invention is to advantageously develop spectacles, so that in particular the abovementioned limitations and disadvantages can be avoided as far as possible.

The object is achieved according to the invention initially and essentially in conjunction with the features that at least two parts of the spectacles are detachably connected or connected to each other by means of plug-in coupling, wherein at least one spectacle part at each at least one connection portion each having a pair of spaced, preferably parallel, spring tongues in the region of its free longitudinal end have a projection directed away from the adjacent spring tongue, wherein at least one or more through holes is provided for releasable connection with each other part of the glasses on the other part of the glasses directly or indirectly, and wherein on the pair of spring tongues in their unloaded state the maximum distance between the outer surfaces of the two projections directed away from one another transverse to the spring tongue longitudinal direction is greater than a width, preferably greater than the maximum width, of the passage opening. Thus, the spring tongues with the projections are so matched to their respective coupling for the passage opening, that when passing the spring tongues in the opening, when the projections pass the comparatively narrower opening cross-section, to an at least temporary deformation of one or both spring tongues in mutual Approach comes. The lateral distance of the spring tongues, so the distance across the

Longitudinal direction of the spring tongues, is sized so large that the spring tongues can at least as far (or further) approach each other, that the two projections can pass through the opening cross-section. Due to the material properties and the design, the spring tongues allow a sufficiently large deformation without breaking. The spring tongues possible a resilient or elastic deformation against a corresponding resilient resistance. The force required to overcome the deformation force is introduced via the pressed against the bore wall projections, ie in the region of the free longitudinal ends in the spring tongues and causes the spring tongues are bent to its opposite fuselage end on the glasses part to the common empty space out. In this case, the comparatively largest approximation in the region of the free longitudinal ends and the slightest approximation of the spring tongues in the area of their fuselage-side ends on the spectacle part (where the approach can also be omitted entirely). If the spring tongues are inserted so far into the opening that the two projections have passed completely or at least partially through the opening region correspondingly smaller width, the deformation force acting on the projections falls completely or partially (depending on the embodiment) away again, so that it elastic self-creation of the spring tongues automatically leads to a complete or partial re-deformation of the spring tongues. Here, the two projections engage behind the narrowed opening cross-section and thus form quasi barbs. In this state, the two parts of the glasses are connected by means of the plug-in coupling described. Depending on the existing requirements, for example, the projections or spring tongues can be designed such that they can no longer be pulled out of the opening in the other part of the piece, at least non-destructively, so that practically speaking there is a permanent plug connection. In the context of the invention, it is preferred that the spring tongues are designed with the projections or tuned to the passage opening that, if necessary, a non-destructive loosening of

Plug-in coupling is possible by the projections or spring tongues for loosening again approximated to the extent required to each other and the spring tongues are removed from the through hole. For this purpose, for example, the free ends of the spring tongues, when they project from the opening in the coupled state, are pressed directly against one another and therewith at the spring tongues or the associated part of the glasses contrary to the insertion direction are pulled out of the opening almost without resistance. On the other hand, depending on the embodiment, it is also possible to apply such a large tensile force to the spectacle part having the opening that the projections or spring tongues approach each other automatically due to the transverse forces acting on them and permit release. On this design options will be discussed below. According to the invention, a pair of spring tongues, each with a described opening in another part of the spectacle, forms a releasable spring-latching connection or spring-snap connection, preferably with a line-symmetrical or axially symmetrical design of the spring tongues. If the plug-in coupling is preferably designed to be detachable again, a desired resistance to be overcome for releasing the parts of the spectacles can be preselected, in particular by the choice of material and the design or matching between spring tongues and passage openings. In accordance with suitably preselected release resistance, the plug-in coupling can provide a sufficient or more than adequate connection strength for the use of glasses, while on the other hand, if necessary, a tool-free and thus time-saving release and, if necessary, a new assembly is possible. The correspondingly easy possible assembly and disassembly offers advantages not only for the purpose of replacing eg. Damaged parts of the glasses, but also, for example. For a thorough cleaning of the glasses and also opens, for example. With regard to different color or design variants numerous combination options.

For the fiction, contemporary glasses are many opportunities for preferred training. Thus, in particular the so-called. Mount of the glasses in addition to the temples optionally still different other frame parts, such as. A lens frame, a bridge glasses, decorative elements or the like, to be solvable with each other and / or with the lenses. bind are included. In a preferred embodiment it is provided that the spectacles have two spectacle lenses and two spectacle stirrups, wherein the pair of spring tongues is provided on each end of the spectacle arms at the longitudinal end facing a spectacle lens, wherein the passage opening in each case directly or indirectly adjoins both spectacle lenses in the region of the spectacle lens is provided by the respective other lens more distant side edge, and wherein for the detachable connection of one eyeglass temple, each with a spectacle lens on the pair of spring tongues in the unloaded state of the spring tongues, the maximum distance of the two outer surfaces of the projections is greater than the associated width of the associated connection for connection , The through hole can be introduced either directly in suitable dimensions for the detachable plug-in coupling in the lenses. Alternatively and within the scope of the invention, there is the possibility that the actual, ie in their dimensions in the manner described on the spring tongues tuned passage opening is provided indirectly to the lenses by being in a, preferably having a flange, sleeve is formed which is firmly inserted into a recess of a spectacle lens which is adapted to the exterior of the sleeve, preferably pressed in and / or glued therein. Corresponding sleeves can be matched uniformly in their geometry to the spring tongues with the projections and on the other hand in spectacle lenses with mutually different optical properties, ie generally different thickness spectacle lenses are mounted and can thus create a uniform receptacle for the plug-in coupling for different lenses. On the other hand, it goes without saying that, for example, for pure sports or sunglasses without optical strength, it would also be possible to dispense with corresponding sleeves, ie the passage openings could be introduced directly into the lenses.

Alternatively or in combination with the preferred embodiment described above, it is possible for the spectacles to have two spectacle lenses and a bridge. The pair of spring tongues is provided in each case at two connection regions of the bridge, wherein the passage opening is provided in each case on both spectacle lenses in the region of the side edge closer to the respective other spectacle lens, and wherein for the detachable connection of one connection region of the bridge each a spectacle lens on the pair of spring tongues in the unloaded state, the maximum distance between the two outer surfaces of the projections is greater than the assigned width of the passage opening associated with the connection. Alternatively or in combination, it can be provided that the glasses have a lens frame or a lens frame and two eyeglass temples, wherein the pair of spring tongues is provided on each end of the eyeglass temple at the longitudinal end facing the lens frame, wherein the passage opening is provided on both side edges of the lens frame , And wherein for the releasable connection of each eyeglass temple with the lens frame on the pair of spring tongues in the unloaded state, the maximum distance of the two outer surfaces of the projections is greater than the associated width of the connection opening associated with the connection. Also, alternatively or in combination there is the possibility that the glasses have two eyeglass temples and a plurality of decorative elements, wherein the pair of spring tongues is provided on each of the decorative elements, wherein the passage opening in each case one or more times on each of the temples between the two longitudinal ends, preferably in one about the middle length range, is provided, and wherein for the detachable connection of a respective decorative element with a temple on the pair of spring tongues in the unloaded state, the maximum distance between the two outer surfaces of the projections GE ge larger than the assigned width of the associated connection for connection or the connection to the connection associated through holes is. The assigned width is understood to be the width of the passage opening in a cross-sectional direction, in which the projections project outwardly when the spring tongues are inserted. It can by the choice of the cross-sectional shapes of the through hole and the spring tongues or projections to be determined so far as a clear assignment.

In connection with the aforementioned embodiments, there are many possibilities for an expedient embodiment. It is preferred that the cross section of the through hole and the cross sections of the spring tongues are coordinated so that the spring tongues in the coupled mounting state in at least a length range between its fuselage end and its projection in at least a portion of their outer surfaces directed away from the inside, preferably flat, on preferably abut against each other, inner surfaces of the through hole and preferably resiliently pressed against it. The latter can be achieved, in particular, in that the cross sections of the spring tongue sections adjoining the projections in the released or unloaded state together have a larger cross-section compared to the bore cross-section. It is also preferred that the passage opening has an elongated opening cross-section with two mutually opposite, rounded opening cross-section ends, that the adjacent spring tongues between their fuselage end and its projection have cross sections whose cross-sectional outer edges are rounded corresponding opening cross-sectional ends, and that transversely to the longitudinal direction the opening cross-section corresponds to the width of the spring tongues of the width of the opening cross-section. In this way, a low-clearance or possibly even backlash clutch seat can be achieved. According to a further aspect, there is the possibility that the two outer surfaces of the projections in a projection on a plane spanned by the two projections reference plane each form a front in their direction of insertion bevel, the front slopes of the two projections extend zugerichtet to their front ends. As a result of this design, the two front slopes form an end-to-end guide bevels, which facilitate both the alignment or insertion of the spring tongues in the coupling opening, and, depending on the angle of inclination, convert a certain proportion of the axial insertion force into a desired transverse force for approaching the spring tongues. Alternatively or in combination, there is the possibility that the two aforementioned outer surfaces of the projections in a projection formed on a plane spanned by the two projections reference plane each have a rear in their insertion direction bevel, that between the rear slope and the front bevel, preferably convexly rounded, Vertex is located and that the rear slopes of the two projections run to the respective vertex area apart. Such rear slopes facilitate the release of the plug-in coupling or the disassembly of the two coupled parts of the glasses, by, depending on the angle of inclination, a certain proportion of applied for disassembly tensile or compressive force again in a direction transverse to the line of symmetry of the fork formed by the spring tongues force to approach the spring tongues is converted. According to another idea, there is the possibility that the spectacle part adjacent to the fuselage-side end of the spring tongues (which is the longitudinal end opposite the free end of the spring tongues) forms a shoulder which extends beyond the trunk-side end of the tongues transversely to their longitudinal direction protrudes outwards, wherein in the longitudinal direction of the spring tongues, the distance between the shoulder and the projection or the rear bevel is adapted to the depth of the through hole, that the spring tongues are held in their coupled mounting state in the longitudinal direction without play in its through hole. This also makes a contribution to a low-play or even total play-free plug connection.

In the context of the invention, it is also preferred that the spring tongues are formed integrally or integrally on their spectacle part. It is preferably thought that the part of the glasses made of plastic, in particular of polyamide exhibiting Plastic, is made. Particularly suitable is a plastic which has a low brittleness, a high breaking strength and a good temperature resistance. The or the spectacle parts may preferably consist of transparent or partially transparent plastic. For example, an unreinforced or reinforced molding composition can be used for the preparation of the spectacle parts, which can comprise, for example, one or more of the following constituents: cycloaliphatic diamine and / or dodecanedioic acid and / or trimethylhexamethylenediamine and / or terephthalic acid. Corresponding molding compositions may preferably contain amorphous and / or partially crystalline and / or crystalline and / or microcrystalline polyamides and more preferably long-chain aliphatic polyamides. One or more of the eyeglass parts may preferably be made by injection molding or other manufacturing methods. With regard to the described possibility that the through-opening associated with the spring tongues is located in a sleeve, it is preferred that the sleeve is made of the same material as the temple or the bridge.

It is preferably provided that the spectacle lenses having at least one respective recess for at least one respective sleeve have different curvatures or curvature profiles on their front surface and on their rear surface. In the case of such spectacle lenses, the front and back surface curves are not identical in a cross section, so that an optical effect results, or is to be said of optical corrective lenses. In this respect, such preferred here spectacle lenses of so-called. Plangläsern whose front and back surface curve is identical and therefore achieve no visual effect. Depending on the curvature or curvature progressions on the front surface and on the rear surface and also dependent on the (average) glass thickness, corrective lenses can have a virtually unlimited variety of glass cross-sectional shapes in order to achieve the individualized corrective effect for the respective wearer. On the other hand, in the case of a In addition, preference is also given to the interchangeability of components directed plug-in system that the components of the plug-in couplings are preferably always standardized or standardized to achieve an inexpensive solution. These conflicting requirements can also be met by the spectacles according to the invention. It is preferred that the sleeve, in particular in standard dimensions, has a sleeve longitudinal section, which is adjoined by the flange, the flange projecting beyond the longitudinal sleeve section in the circumferential direction, continuously or circumferentially, transversely to the longitudinal geometrical center axis of the sleeve. In particular, in the aforementioned context, it is preferred that the recess of the spectacle lens, in which the sleeve is inserted, has a Ausnehmungslängsab- outgoing from the, preferably concave, rear surface of the lens Ausnehmungslängsab- section, whose cross-sectional inner contour for at least length-wise acquisition of the sleeve longitudinal section geometrically to the Cross-sectional outer contour of the sleeve longitudinal section is adapted, and that the recessed longitudinal section, preferably gradually, merges into a recess extending from the, preferably convex, front surface of the spectacle lens whose cross-sectional inner contour for geometrically receiving at least the length of the flange geometrically to the cross-sectional outer contour of Flange is adapted. Preferably, the recess extension can be designed like a countersinking starting from the front surface of the spectacle lens up to a narrow countersunk bottom running along the recess edge. It is considered appropriate that the recessed longitudinal section passes into the recess extension stepwise to form a circumferentially extending narrow support surface for the flange, wherein the support surface extends in a direction perpendicular to the optical axis of the spectacle lens cross-sectional plane. In this respect, it is also preferred that the geometric longitudinal central axis of the recess in the spectacle lens into which the sleeve is inserted extends parallel to the optical axis of the spectacle lens. To unify the sleeve is preferred that the frontal cross-section of the free longitudinal end of the sleeve longitudinal section is oriented perpendicular to the geometric longitudinal center axis of the sleeve. In particular, in connection with the aforementioned features, there is advantageously the possibility that the dimension of the recess longitudinal section in the direction of the geometric longitudinal central axis of the recess is dimensioned or adapted to the dimension of the sleeve longitudinal section in the direction of the longitudinal center axis, that when used in the recess sleeve free Longitudinal end of the sleeve longitudinal section along its, preferably entire, circumference in the direction of the longitudinal geometric center axis of the sleeve over the rear surface of the lens protrudes back, or that the free longitudinal end of the sleeve longitudinal portion in the direction of the geometric longitudinal center axis of the sleeve circumferentially or circumferentially locally flush with the rear surface of the lens closes and protrudes back along its remaining circumference on the rear surface of the lens. This causes the front side of the free longitudinal end of the sleeve longitudinal section along its entire circumference for axial support of the provided on the plug shoulder is available. Given a specific predetermined thickness or thickness of a spectacle lens in its mounting region for the temple, this can be achieved by matching the depth of the recess extension measured in the direction of the geometric longitudinal center axis. The larger in the direction of the longitudinal geometric center axis the dimension of the recess extension is selected, the smaller the resulting dimension of the recess longitudinal section, so that for each glass thickness and for each curvature of the front surfaces and the rear surfaces of the spectacle lens one to the standardized sleeve and the standardized plug can achieve suitable adaptation. This tuning is also possible, although the front and rear surfaces of the lens in corrective lenses are not perpendicular to the optical axis, on the other hand, the standardized sleeve but at their longitudinal ends have planar cross-sections. The use of standardized or uniformly shaped and dimensioned sleeves. also tats the use of standardized plugs that need to be geometrically adapted to achieve a secure connector, a simple installation and possibly a simple disassembly just to the sleeve. Despite the wide variety of geometry of corrective lenses, uniform plug-in couplings can thus be used. The adaptation to the respective spectacle lens or its geometry can be done by the recessed recess therein. Such a preferred embodiment also allows a tension-free mounting of the lenses with the straps and / or with a bridge. If the glass thickness or the glass thickness varies, this can be compensated by suitably adapting the insertion depth of the sleeve into the spectacle lens, so that the standardized plug-in coupling can be used. Without the proposed sleeve or the proposed adaptation of their insertion depth in the lenses, a firm assembly by too high tension on the lenses (at least if they are not made of polycarbonate) would not be feasible given the different curves of the front and Rückflä- surfaces of the lenses ,

According to a further aspect, it is preferred that the plug-in coupling comprises a closure which can be released from it and which has a plug-in spar and a cap adjoining it, wherein in at least one cross-sectional direction

Cross-section of the stanchion is the same size or slightly larger than the cross section of the hollow space between the two spring tongues in at least one length range, in particular in the mouth region between the free longitudinal ends of the spring tongues. When the plug is inserted in the coupled state in the sleeve, the hollow space between the spring tongues is free end, so that the closure can be inserted with its plug-in between the two spring tongues. This prevents that the two tabs can approach each other, so that in this quasi-locked or secured state of the plug can not be pulled out of the sleeve. This provides a safeguard against unintentional loosening of the plug-in An initially releasable connection, as long as the closure is inserted therein, to a permanent connection and can thus serve for fixed mounting. Depending on the selected thickness of the stub shaft, a certain desired lateral clamping action between the two spring tongues can be achieved in order to achieve a holding force in the longitudinal direction. Preferably, it is also provided that the cap is designed as a cross-sectionally open hollow body, extending from the inner bottom of the plug rail, and that the hollow body in the fitted state, the spring tongues positively engages around their free longitudinal ends. Again, this can be used with a suitable adjustment of the dimensions to secure the closure against unintentional loosening of the plug-in coupling.

With regard to the projections of the spring tongues, it is preferred that they (as already described) have front and rear bevels in a longitudinal cross section. Their slope and in particular the mouth of the sleeve can be chosen or designed so that a desired longitudinal force for insertion and withdrawal of the plug results from the sleeve, said longitudinal force may differ in the two directions. It is preferably provided that, starting from the coupled state of two parts of the spectacles, these parts of the spectacle can be separated again from the passage opening without the aid of tools by pulling out the connector. For this purpose, it would also be conceivable, for example, to provide a rounding in place of the front slope and / or instead of the rear slope with respect to the said longitudinal cross section, in order to facilitate tool-free cutting. In particular, in this context, the preferred closure can offer advantages.

The invention will be further described below with reference to the accompanying figures, which show preferred embodiments. It shows: Fig. 1 in perspective, the glasses according to the invention according to a first preferred embodiment, assembled;

1a is a partial section on the sectional plane Ia in Fig. 1,

FIG. 2 is a perspective view of the spectacles shown in FIG. 1, but in an exploded view; FIG.

Fig. 3 in magnification the detail III of Fig. 1;

FIG. 4 shows the detail shown in FIG. 3, but in an exploded view; FIG.

5 perspectively the spectacles according to the invention according to a second preferred embodiment, assembled;

Fig. 6, the glasses shown in Figure 5, in opposite viewing direction.

FIG. 7 shows the spectacles shown in FIG. 5, but in exploded view; FIG. 8 is a perspective view of the spectacles according to the invention according to a third preferred embodiment, assembled;

FIG. 9 shows the spectacles shown in FIG. 8, in exploded view; FIG. Fig. 10 in comparison to the preceding figures in enlargement

Longitudinal end of a spectacle arm with a pair of spring tongues provided on the front side according to a preferred embodiment; FIG. 11 shows a side view in the viewing direction XI according to FIG. 10; FIG. FIG. 12 shows an end view in the viewing direction XII according to FIG. 10; FIG. FIG. 13 shows a plan view in the viewing direction XIII according to FIG. 10; FIG.

Fig. 14 in comparison to the figures 1 to 10 in magnification there in the

Spectacle lenses inserted sleeve;

FIG. 15 is a perspective view of the sleeve shown in FIG. 14, in the reverse direction; FIG.

16 shows the longitudinal end of the eyeglass temple shown in FIG. 10 and the sleeve shown in FIG. 14, in a releasably coupled state with one another; FIG. 17 shows a side view in the viewing direction XVII according to FIG. 16;

FIG. 18 shows a sectional view on section plane XVIII-XVIII according to FIG. 17; FIG.

Fig. 19 is a sectional functional view showing a plug during insertion into a through hole;

20 in an enlarged, compared to the preceding figures,

Cross-section of a lens with pressed-in sleeve; FIG. 21 shows an enlarged detail of region XXI of FIG. 20, but with the eyeglass temple inserted therein; FIG.

FIG. 22 shows the detail enlargement according to FIG. 21, but with the closure additionally inserted into the coupling; FIG. 22a is a sectional view taken along section line XXIIa - XXIIa of FIG. 22;

Fig. 23 in perspective and in enlargement to Fig. 22 the there shown

closure;

Fig. 24 in a comparable to Fig. 20 sectional view of a spectacle lens with deviating front and rear surfaces and

FIG. 25 shows a further, deviating spectacle lens in a sectional view comparable to FIGS. 20, 24.

The invention will be described below first with reference to the glasses 1 shown in Figures 1 to 4 according to a first preferred embodiment. In the exemplary embodiment shown, the spectacles 1 comprise as spectacle parts two spectacle lenses 2, two spectacle stems 3, a so-called bridge 4 and a total of six decorative elements, which uniformly bear the reference numeral 5 irrespective of their design differences. The exploded view shown in FIG. 2 further illustrates that these parts of the spectacles can be assembled predominantly by means of plug-in couplings 6 to form the spectacles 1 and, if necessary, can be detached again from one another. Regardless of the small difference between individual plug-in couplings which will be described, these are uniformly provided with the reference numeral 6 for a better overview, as also in the following figures. It is envisaged that one eyeglass temple 3 can be detachably connected to one of the two eyeglass lenses 2 by means of one plug-in coupling 6 and that a maximum of three separate decorative elements 5 can be attached to each eyeglass temple 3 by means of one plug-in coupling 6 each. In the exemplary embodiment shown (ie, not necessary), it is provided that the bridge 4 serving to connect the two spectacle lenses 2 can be screwed with one spectacle lens 2 at their two connection areas remote from each other. Serve the purpose in Figure 2 seen- ble screws 8 and nuts 9, by means of which at the same time the two nose posts 10 can be adjusted and fixed. Alternatively, it would be possible to connect the bridge 4 and the lenses 2 by means of plug-in couplings, as they serve in the figures for the connection of the temples 3 with the lenses 2.

As is also clear from FIGS. 10 to 18 in enlargement, each plug-in coupling 6 comprises a pair of laterally spaced spring tongues 11. From each terminal region 12 of a spectacle part, the two tongues extend from a respective integrally formed tubular end 13 over a respective length range 14 up to a free longitudinal end 15, wherein the two projections 11 in their predominant length range parallel to each other and at the edge of a hollow intermediate space 16, which has no boundary on the side of the free longitudinal ends 15, erstre- (see Figure 11) , The spring tongues 6 have in the region of their free longitudinal end 15 a directed away from the adjacent spring tongue 6 of the pair jump 17 before. The two spring tongues 11 with their jumps before 17 together form a respect to a geometric longitudinal center axis M axisymmetric plug 18 of the plug-in connector 6. While the connector 18 is on a first part of the glasses, in the embodiment of a temples 3 or on a decorative element 5, is included the coupling 6 further has a through opening 19, which is matched to the plug 18 and which is located on another part of the spectacle, which is to be connected to the spectacle part having a plug 18. In the embodiment shown, such through holes 19 are located on the lenses 2 for attachment of a temple piece 3 and on the temple pieces 3 for attachment of decorative elements 5. Figure 11 shows a connector 18 outside such a passage opening 19 in an unloaded state, in which the spring tongues 11 and projections 17 no external forces act. A is the maximum distance between the two mutually directed Surfaces 20 of the two projections 17 denotes. This maximum distance A is greater than the maximum clear width W of the passage openings 19, which is shown, for example, in FIGS. 2, 4 and 14. FIG. 2 shows that in each of the eyeglass temples 3, three passage openings 19 each are directly embedded, which are spaced one behind the other in an approximately central length region of the eyeglass temple 3 in its longitudinal direction. On the other hand, the through holes 19 matched to the plugs 18 are not directly embedded in the lenses 2, but the lenses 2 have slightly larger through holes, the contour of which is suitable for a sleeve 21 inserted therein, whereby here the through opening adapted to the plugs 18 19 extends transversely to the lens plane through said sleeve 21 (see also Figures 14, 15). In the embodiments shown, the sleeve 21 has a flange 22, which either enters into a front-side depression of a spectacle lens 2 or rests on said front side. According to these explanations, a plug-in coupling 6 comprises a plug 18 of the one spectacle part and a through-opening 19 which is formed in the other part of the spectacle to be connected either directly or in a sleeve 21 connected thereto or firmly inserted therein, ie in that respect indirectly , The reference numerals 12 designate connection areas of spectacle parts, on each of which a pair of the described spring tongues 11 are provided. In the eyeglass temple 3, the terminal portions 12 are located at the front longitudinal ends, and in the decorative elements 5, these are each located on a side facing the temple 3. Figures 5 to 7 show the glasses 1 according to the invention according to a second preferred embodiment. These glasses also have two lenses 2, a bridge 4 and two temples 3, each with a plurality of decorative elements to be fastened detachably thereto 5. The difference from the first embodiment shown in Figures 1 to 4 is that at the bridge 4 at two end Connection areas 12 each have a pair of spring tongues 11 available is, wherein the spring tongues 11 also have the shape shown in Figures 10 to 13 and in pairs form a corresponding connector 18. Each of the two lenses 2 has in the region of its side edge facing the bridge 4, a recess 31, in which a sleeve 21 is glued fit, extending through said sleeve 21 a matched to the connector 18 in the sense described above through hole 19 therethrough. In this way, the bridge 4 with its two connectors 18 with the two lenses 2 by means of a respective plug-in coupling 6 (see Fig. 5) are detachably connected. As in the first embodiment, each eyeglass temple 3 can be releasably connected by means of a respective plug-in coupling 6 detachably with a spectacle lens 2 in the region of the outer side edge. Also, as in the first embodiment optionally up to three decorative elements 5 can be removably attached to each of the temples 3 by means of a respective plug-in coupling 6.

FIGS. 8 and 10 show a third preferred exemplary embodiment of the spectacles 1 according to the invention. This comprises two spectacle stems 3 and two spectacle lenses 2 which in the example (ie not necessary) are firmly inserted into a respective revolving lens frame or lens frame 7. The glass enclosure 7 also includes a bridge, ie both lenses are inserted into a common lens enclosure 7. The pair of spring tongues 11 is again provided in each case at the front longitudinal end of the two temple pieces 3, that is to say at the longitudinal end facing the glass enclosure 7. The glass enclosure 7 has at its two outer side edges each have a passage opening 19 which extends transversely to the frame plane and which is tuned in the manner described above to the pair of plugs 18 formed by the spring tongues. FIG. 8 shows the plug-in couplings 6 formed by a respective plug 18, each having a passage opening 19, by means of which the two eyeglass temples 3 can be detachably fastened to the lens frame 7. Figures 16 to 18 illustrate that the cross section of the through hole 19 and the cross sections of the spring tongues 11 are matched to one another in the selected embodiments, that the spring tongues 11 in the coupled mounting state in its length range 14 between the rüpf soifigen end and the projection 17 with their facing away from each other outer surfaces 23 (see Figure 18) from the inside surface against opposing inner surfaces 24 of the through hole 19 and thereby resiliently pressed against it. FIG. 18 also shows that the through-opening 19 has an elongate or slot-like clear opening cross section with two mutually opposite rounded opening cross-section ends in the region of the inner surfaces 24, that the two mutually adjacent spring tongues 11 between their rüpf soifigen end 13 and its free longitudinal end 15 and Projection 17 each have a cross-section, the cross-sectional outer edges directed away from each other (ie in the region of the outer surfaces 23) are rounded according to the opening cross-sectional ends, and that corresponds to the width B of the spring tongues 11 of the width C of the opening cross-section transverse to the longitudinal direction L of the clear opening cross-section. In FIG. 18, the inside width W is the comparatively largest dimension of the clear opening cross section and extends in the longitudinal direction L of the cross section, which is perpendicular to the direction of the width C.

The two visible in Figure 11 outer surfaces 20 of the projections 17 in the projection shown in Figure 11 on one of the two spring tongues 11 spanned geometric reference plane (this corresponds to the plane of Figure 11) each one in its plug 25 (see 11 indicated arrow direction) front bevel 26, wherein the two front bevels 26 of the projections 17 toward their front ends, ie, directed in the insertion direction 25, obliquely directed toward each other. Furthermore, the two outer surfaces 20 of the projections 17 in the said projection on the drawing plane of Figure 11 form a rear slope 27 in its insertion direction 25 from, wherein between the respective rear slope 27 and the respective front slope 26 is a convex rounded apex portion 28 and wherein the two rear slopes 27 are directed to the respective apex portion 28 obliquely apart. In the side view or projection view shown in FIG. 11, the two projections 17 thus have the contour of a triangle with a tip rounded at the apex 28 in the regions laterally projecting beyond the straight length regions 14. FIGS. 10 to 13 also show that the spectacle part forms, at its connection region 12 adjacent to the tubular soapy end 13 of the spring tongues 11, a shoulder 29 which extends around the entire base cross section of the connector 18. The shoulder 29 projects beyond the hull-side end 13 of the spring tongues 11 transversely to the longitudinal direction X thereof and thus forms a stop limiting the insertion depth of the plug 18 in the plug-in direction 25 with the opening edge of the associated through-opening 19, wherein in the longitudinal direction X of the Distance between the shoulder 29 and the rear slope 27 is adapted to the depth of the through holes 19, that the spring tongues 11 are held in its coupled mounting state in the longitudinal direction X play in the through hole 19. This tuning can also be given, in particular, taking account of bevels present at the through-openings 19.

FIG. 19 additionally shows, in a cutaway functional view, the plug 18 shown in FIGS. 10 to 14 during its insertion into the sleeve 21 shown in FIGS. 14, 15. The maximum distance A shown in FIG. 11 with respect to the still unloaded plug 18 between the Both outer surfaces 20 of the projections 17, which is oriented perpendicular to the geometric longitudinal center axis M, is greater than the example. In Figure 14 shown inside width L in the longitudinal direction L of the opening cross-section. During the insertion of the plug 18 in a through hole 19, in particular in a sleeve 21, first meet the front slopes 26 of the spring tongues 11 on the edge of the Through opening 19, which has a chamfer 30 in Figures 14, 15. Figure 10 illustrates that the front inclined surface 20 is convex rounded, so that it comes to an at least line or surface conditioning, whereby an advantageously low surface pressure is achieved. If the plug 18 is further inserted in the insertion direction 25 in the through hole 19, a proportion of the axial insertion force to the front slopes 26 according to their inclination is converted into a transverse force. The edge of the passage opening 19 thereby exerts at its two rounded longitudinal ends each directed to the longitudinal center axis M compressive force, whereby the spring tongues 11, with the distance from its fuselage end 13 increasingly, elastically deflected or bent to the longitudinal central axis M out until the distance A shown in FIG. 11 is reduced to such an extent that it corresponds to the clear width W and the plug 18 can be pushed through the passage opening 19. If the plug 18 is inserted further beyond the position shown in FIG. 19 in the insertion direction 25 into the passage opening 19, the shoulder 29 finally limits this movement. Since the projections 17 protrude from the passage opening 19 at least with their apex regions 28, an elastic, at least proportional reversion of the spring tongues 11 occurs, so that the maximum distance measured transversely to the insertion direction 25 between the outer surfaces 20 of the projections 17 again exceeds the width W. becomes. The elastic return deformation thus leads to a locking position, from which the plug 18 can be removed again only by overcoming a certain minimum force from the passage opening 19 or from the sleeve 21. The rear slopes 27 thereby influence with their angle of inclination the amount of this to be overcome release force. In the coupled state shown in Figure 17, the plug 18 is received in the through hole 19 both in the insertion direction 25 as well as transversely positively and play. The two outer edges of the length regions 14 of the spring tongues 11 shown in FIG. 11 can, for example, run parallel to one another. On the other hand, however, with regard to a backlash-free and spring-loaded would take in the through hole 19 also a slight inclination of these outer edges, so that they approach in the direction of the free longitudinal ends 15, offer advantages. In the embodiments shown, the spring tongues 11 are each integrally formed, that is integrally formed on their respective spectacle part, or at its connection portion 12. In this case, the eyewear parts of the mount each consist of a plastic, from which the sleeves 21 were made. FIG. 20 shows a spectacle lens 2 which is suitable for the spectacles 1 according to the invention and whose rear surface 32 facing towards the eye of a wearer and whose opposite front surface 33 have mutually different curvature profiles. At a mounting region, a recess 31 is inserted directly into the spectacle lens 2 for connecting a spectacle arm (not shown in FIG. 20), which recess extends continuously through the spectacle lens 2 parallel to the optical axis 34. In the recess 31, a sleeve 21 is inserted without play and clamped in the example, but could also be attached, for example. By gluing or the like. Said sleeve 21 has a comparatively slender sleeve longitudinal section 35, which is adjoined longitudinally by the flange 22, which in the example in the circumferential direction extends continuously transversely to the longitudinal geometric central axis 36 of the sleeve 21 beyond the sleeve longitudinal section 35. The recess 31 has an outgoing from the concave rear surface 32 recess longitudinal portion 37, which is designed as an opening with an approximately oval cross-section. Its hollow cross-section corresponds to the cross-section of the sleeve longitudinal section 35 for receiving the sleeve longitudinal section 35. Starting from the convex front face 33, a recess extension 38 extends in the spectacle lens and has a comparatively larger, also approximately oval, cross-section. In the example, the hollow cross section corresponds to the cross section of the flange 22. The recess longitudinal section 37 extends in a longitudinal direction. cross-section rectangular and in cross-section annular circumferential step in the recess extension 38 via. The stepped transition forms a circumferential support surface 39 for supporting the flange 22 in the longitudinal direction, wherein the support surface 39 extends in a cross-sectional plane perpendicular to the optical axis 34. Also, the longitudinal geometric center axis 40 of the recess 31, which is identical in the example with the longitudinal geometric center axis 36 of the sleeve 21, extends parallel to the optical axis 34. The frontal cross-section 41 of the free longitudinal end of the sleeve longitudinal section 35 extends perpendicular to the geometric

Longitudinal center axis 36, 40. The measured from the convex front surface 38 of depth, d. H. the dimension of the recess widening 38, in the direction of the longitudinal geometric center axis 40, is dimensioned in such a way that the free longitudinal end of the sleeve longitudinal section 35 in the direction of the longitudinal geometric central axis 36 at the circumference (locally) see in the direction of Figure 20 right) terminates flush with the rear surface 32 of the lens 2 and something over its remaining circumference on the rear surface 32 of the lens. FIG. 21 shows an enlargement of the detail XXI of FIG. 20, with a plug 18 integrally formed on the end face of a spectacle arm 3 being inserted and locked into the sleeve 21 for connection of the spectacle arm 3. For the operation thereof, reference is made to the foregoing description. It can be seen that the frontal cross-section 41 of the sleeve 21 along the entire circumference for supporting the shoulder 29 on the plug 18 in the direction of the geometric longitudinal center axis is usable.

Figures 22, 22a show the situation of Figure 21, wherein in addition to securing the plug-in coupling against unintentional release a closure 43 has been plugged onto the free longitudinal end of the plug 18, so that its central Plug spar 44 occurs under a desired lateral clamping in the mouth area in the hollow space 16 between the two spring tongues 11 and wherein the cap formed as an open hollow body 45 with its inner edge, the free longitudinal ends 15 of the spring tongues 11 surrounds.

FIG. 23 illustrates that the plug bar 44 extends from the inner bottom 46 of the hollow cap 45. The closure 43 can preferably be made in one piece from plastic, for example from the same plastic as the sleeve and the plug.

FIGS. 24 and 25 show two spectacle lenses 2 which differ from each other and from the spectacle lens of FIG. 20 by the respective curvature profiles of the rear surface 32 and the front surface 33, with sleeve 21 pressed into a recess 31 in each case. As a comparison of the figures clearly shows As a result, different thicknesses or thicknesses of the spectacle lens 2 result in the respective mounting area for a temple in addition to locally different surface curvatures 2. In order to fix a spectacle temple, use the sleeve 21 already selected in FIG. 20 in the same shape and dimensions (ie standardized) 24, the recess extension 38, starting from the front surface 33, extends to a greater depth in comparison to FIG. 20 into the interior of the spectacle lens 2. The geometric longitudinal axis 36, 40 also extends parallel to the optical axis 34. If, starting from FIG. 20 d The thickness of the spectacle lens has not been increased, but has been reduced in comparison with it, the free longitudinal end 42 of the sleeve 21 could project beyond the rear surface 32 along its entire circumference. In FIG. 25, the geometric longitudinal central axis 36, 40 does not extend parallel to the optical axis 34, but extends in the perpendicular direction or in the normal direction to the front surface 33. All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optional sibling version independent inventive development of the prior art, in particular to make on the basis of these claims divisional applications.

LIST OF REFERENCE NUMBERS

1 pair of glasses 27 rear slant

2 lenses 28 apex area

3 eyeglass temple 29 shoulder

4 bridge 30 chamfer

5 decorative elements 31 recess

6 plug-in coupling 32 rear surface

7 glass bezel 33 front surface

8 screws 34 optical axis

9 nuts 35 sleeve longitudinal section

10 nose posts 36 geometric longitudinal center axis

11 spring tongues 37 recess longitudinal section

12 connection area 38 recess extension

13 fuselage end 39 support surface

14 length range 40 geometric longitudinal center axis

15 longitudinal end 41 frontal cross-section

16 space 42 longitudinal end

17 projection 43 closure

18 plug 44 plug spar

19 through hole 45 cap

20 outer surfaces 46 inner bottom

21 sleeve

22 Flange A Maximum distance

23 outer surfaces B width

24 inner surfaces C width

25 insertion direction L longitudinal direction

26 front slope M longitudinal center axis

W width

X longitudinal direction

Claims

1. spectacles comprising a plurality of spectacle parts, in particular spectacle lenses (2), temple (3), a spectacle bridge (4), a lens frame (7), decorative tion elements (5) or the like, characterized in that at least two parts of the spectacles by means of plug-in coupling (6), in particular detachably, can be connected or connected to each other, wherein at least one part of the glasses at each at least one connection region (12) each have a pair of, in particular parallel, spaced spring tongues (11) in the region of its free longitudinal end (15) one of at least one or more through openings (19) is provided for releasable connection with each other part of the other part of the glasses directly or indirectly, and wherein at the pair of spring tongues (11) in the unloaded state of the maximum distance (A) between the outer surfaces directed away from each other (20) of the two projections (17) is larger than a width (W) of the through hole (19).

2. Spectacles according to claim 1 or in particular according thereto, characterized marked, that the glasses (1) has two spectacle lenses (2) and two spectacle stirrups (3), wherein the pair of spring tongues (11) on both eyeglass temples (3) at the front the longitudinal end is assigned to a spectacle lens (2), the passage opening (19) being provided directly on both spectacle lenses (2) directly or indirectly in the region of the side edge remote from the respective other spectacle lens (2), and wherein the detachable connection is ever a temples (3) each having a spectacle lens (2) according to claim 1 on the pair of spring tongues (11), the maximum distance (A) of the two outer surfaces (20) of the projections (17) greater than the width (W) of the connection associated with the connection - Opening (19) is. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the passage opening

(19) in a flange (22) having a sleeve (21) is formed, which in a recess (31) of a spectacle lens (2) fixedly inserted, in particular pressed and / or glued, is

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spectacles (1) comprises two spectacle lenses (2) and a bridge (4), wherein the pair of spring tongues (11) respectively at two connection areas (12) of the bridge (4) is provided, wherein the passage opening (19) is provided in each case on two spectacle lenses (2) in the region of the respective other spectacle lens (2) nearer side edge, and wherein for the detachable connection of a respective connection region (12) of the bridge (4 ), each having a spectacle lens (2) according to claim 1 on the pair of spring tongues (11), the maximum distance (A) of the two outer surfaces (20) of the projections (17) is greater than the width (W) of the passage opening associated with the connection (19) ,

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spectacles (1) has a glass enclosure (7) and two spectacle stirrups (3), wherein the pair of spring tongues (11) in each case on both spectacle stirrups (3) on the front side the longitudinal end provided with the glass enclosure (7) is provided, the passage opening (19) being provided on both side edges of the glass enclosure (7), and wherein for detachable connection of a respective spectacle stirrup (3) to the glass enclosure (7) according to claim 1 on the pair of spring tongues (11), the maximum distance (A) of the two outer surfaces

(20) of the projections (17) is greater than the width (W) of the passage associated with the connection opening (19). Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spectacles (1) comprises two spectacle stirrups (3) and a plurality of decorative elements (5), wherein the pair of spring tongues (11) are respectively provided on each of the decorative elements (5) is, wherein the passage opening (19) each one or more times on each of the eyeglass temple (3) between the two longitudinal ends, in particular in an approximately central length range, is provided, and wherein for the releasable connection of a respective decorative element (5) with a temple (3) according to claim 1 on the pair of spring tongues (11), the maximum distance (A) of the two outer surfaces (20) of the projections (17) greater than the width (W) of the associated connection for the passage opening (19) or for connection optionally assigned Through openings (19).

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the cross section of the passage opening (19) and the cross sections of the spring tongues (11) are matched to one another such that the spring tongues (11) in the coupled mounting state in at least one longitudinal region ( 14) between its fuselage end (13) and its projection (17) in at least a portion of their spaced apart outer surfaces (23) from the inside, in particular flat, in particular against opposing inner surfaces (24) of the through hole (19) rest, in particular resiliently be pressed against it.

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the passage opening (19) has an elongated opening cross-section with two mutually opposite rounded opening cross-sectional ends, that the adjacent spring tongues (11) between their fuselage-side end (13) and its projection (17) have cross-sections whose mutually wegragenden cross-sectional outer edges are rounded according to the opening cross-sectional ends, and that transverse to the longitudinal direction (L) of the opening cross section, the width (B) of the spring tongues ( 11) corresponds to the width (C) of the opening cross section.

9. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the two outer surfaces (20) of the projections (17) in a projection on one of the two

Formed spring tongues (11) spanned reference plane depending on a direction of insertion (25) front bevel (26), wherein the front bevels

(26) of the two projections (17) extend towards their front ends facing each other.

10. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the two outer surfaces (20) of the projections (17) in a projection on a plane defined by the two projections reference plane depending in their insertion direction (25) rear slope (27) train that between the rear slope

(27) and the front slope (26) is a, in particular convexly rounded, apex region (28) and that the rear slopes (27) of the two projections (17) to the respective apex region (28) extend apart.

11. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spectacle part adjacent to the fuselage end (13) of the spring tongues (11) forms a shoulder (29), which over the fuselage end (13) of the spring tongues (11) projects outwards transversely to its longitudinal direction (X), wherein The longitudinal direction (X) of the spring tongues (11), the distance between the shoulder and the rear slope is adapted to the depth of the through hole, that the spring tongues are held in their coupled mounting state in the longitudinal direction without play in its through hole.

12. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spring tongues (11) are integrally formed on their spectacle part.

13. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spectacle part is made of plastic, in particular of polyamide plastic having.

14. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the sleeve (21) made of the same material as the eyeglass temple (3) or as the bridge (4).

15. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the at least one respective recess (31) for at least one sleeve (21) having spectacle lenses (2) on its front surface (33) and on its rear surface (33 32) have different curvatures from each other.

16. Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the sleeve (21) has a sleeve longitudinal section (35) to which the flange (22) adjoins, wherein the flange (22) in the circumferential direction continuously or Envelopes circumferentially transversely to the geometric longitudinal central axis (36) of the sleeve (21) on the sleeve longitudinal portion (35).

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the recess (31) of the spectacle lens (2), in which the sleeve (21) is inserted, one of the, in particular concave, rear surface (32) of the spectacle lens (2) has an outgoing recess longitudinal section (37), whose cross-sectional inner contour is adapted geometrically to the cross-sectional outer contour of the sleeve longitudinal section (35) for at least the lengthwise receiving of the sleeve longitudinal section (35), and in that the recess longitudinal section (37), in particular stepped, into a from the, in particular convex, front surface (33) of the spectacle lens (2) outgoing Ausnehmungserweite- tion (38) passes whose cross-sectional inner contour for at least lengthwise recording of the flange (22) is geometrically adapted to the cross-sectional outer contour of the flange (22).

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the recess longitudinal section (37) in the recess extension (38) stages over to form a circumferentially extending support surface (39) for the flange (22), wherein the support surface (39) extends in a cross-sectional plane perpendicular to the optical axis (34) of the spectacle lens (2).

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the geometric longitudinal central axis (40) of the recess (31) in the spectacle lens (2), in which the sleeve (21) is inserted, parallel to the optical axis (34) of the spectacle lens (2). Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the frontal cross-section (41) of the free longitudinal end (42) of the sleeve longitudinal section (35) oriented perpendicular to the geometric longitudinal central axis (36, 40) of the sleeve (21) is.

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the dimension of the recess longitudinal section (37) in the direction of the geometric longitudinal central axis (40) of the recess (31) is dimensioned so that when inserted into the recess (31) sleeve (21) the rear longitudinal surface (42) of the sleeve longitudinal section (35) along its, in particular entire circumference in the direction of the longitudinal geometric central axis (36) of the sleeve (21) over the rear surface of the spectacle lens (2) protrudes back, or that free longitudinal end (42) of the sleeve longitudinal section (35) in the direction of the longitudinal geometric central axis (36) of the sleeve (21) circumferentially or circumferentially locally flush with the rear surface (32) of the lens (2) closes and along its remaining circumference on the Rear surface (32) of the lens (2) protrudes back.

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the plug-in coupling (6) comprises a detachable closure (43) which has a plug-in spar (44) and an adjoining cap (45), wherein in at least one Cross-sectional direction of the cross section of the striker (44) is equal to or slightly larger than the cross section of the hollow space (16) between the two spring tongues (11) in at least one length range of the spring tongues (11). Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the cap (45) is designed as a cross-sectionally open hollow body, from the inner bottom (46) of the plug-in spar (44) starts, and that the hollow body in the fitted state the spring tongues (11) engages positively at their free longitudinal ends (15).

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that the spectacle lenses (2) are made of a material other than polycarbonate.

Spectacles according to one or more of the preceding claims or in particular according thereto, characterized in that, starting from the coupled state of two parts of the spectacles, they can be separated again from the passage opening (19) without the aid of tools by pulling out the plug (18).