FR3010368A1 - WIPER DEVICE WIPER LIP - Google Patents

Abstract

Wiper device having a wiper lip (20) having an elongate flexible upper portion (10) and a flexible lower portion (12) connected by a plurality of connecting members (18) for relative movement of the two parts (10, 12). The wiping lip is configured so that the rigidity in the wiping direction is greater than that in the direction perpendicular to the wiping direction.

Description

Field of the Invention The invention also relates to a vehicle wiper device, particularly a motor vehicle with a wiping lip.

State of the art Typically, the wiper devices have a wiper arm or windshield wiper lever which is attached to a wiper blade with a wiping lip for move on a window of a motor vehicle. The wiper arm is moved alternately between a first motion reversing position and a second motion reversing position. For this, the wiper arm is connected to a wiper motor via a drive shaft. In particular, in the case of windshields with large variations in curvature, the wiper blade and its wiper lip easily lose contact with the windshield. Thus, particularly in the case of strongly curved windows, regions may not be wiped or have streaks or sails. In known wiper devices according to the state of the art, when reversing the movement of the wiper arm in the inverting positions, there is often a noise perceived as disturbing, in particular depending on the vehicle and / or the driving situation of the vehicle. This noise is caused by the wiping lip which, when reversing the direction of movement of the windscreen wiper arm or windscreen wiper blade, rises first, pushing the arm windshield wiper in relation to the window and then fold back in the other direction. When folding, the wiper arm with the wiper blade is accelerated toward the window. The wiper blade moves in the direction of the window and is then suddenly braked. Acceleration and braking cause a shock against the window that causes noise. There is thus a need to improve the wiper devices, in particular to avoid, or at least reduce, their operating noise. To improve windshield wiper devices, a large number of boundary conditions must be considered. These include manufacturing or manufacturing cost, material cost and wiper device properties, including operation under multiple conditions as well as reliability under many conditions. Vehicle wiper systems must take into account that the pressure on prices is still increasing and the vehicles are used in a wide variety of climatic conditions with, for example, extreme temperatures, continuously and / or with strong variations. OBJECT OF THE INVENTION The object of the present invention is to develop a wiper lip which makes it possible to reduce or avoid one or more of the above disadvantages. DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the invention is a wiping lip for a windscreen wiper device comprising a windscreen wiper blade consisting of an elongated at least partially flexible upper part, an elongated bottom part at least partially flexible, a plurality of connecting elements connecting the upper part and the lower part being spaced apart in the direction of longitudinal extension of the wiper blade, the connection elements allowing relative movement between the upper part and the lower part with a component of movements in the direction of longitudinal extension of the wiper blade and the wiper device is adapted to a vehicle, in particular a motor vehicle, the lip of wiping comprises a bending beam for reducing stiffness in the direction perpendicular to the wiping direction, in particular a bending beam provided with a wiping edge and a surface of the bending beam facing the wiping edge perpendicular to the wiping direction, and adjacent to the facing surface there is a slot or a cavity. Thus the invention relates to a wiper lip which is adapted to a wiper device comprising a wiper blade having an elongated upper portion and an elongated lower portion, these two parts being at least partially flexible . The windscreen wiper device with the wiping lip has a plurality of connecting members connecting the upper portion and the lower portion being distributed in the direction of longitudinal extension of the wiper blade. The connecting members allow relative movement of the upper and lower portions with a movement component in the longitudinal extension direction of the wiper blade. The wiper device is intended for a vehicle, in particular a motor vehicle. The wiping lip includes a bending beam, in particular a bending beam with a wiping edge and a surface of the bending beam which is oriented in the direction perpendicular to the wiping stop with respect to the direction of rotation. wiping and adjacent to the facing surface is a slot or a cavity. According to developments of the invention there is a wiper lip adapted to a wiper device having a wiper blade with an elongated upper portion and an elongated lower portion and which are at least partially flexible. The wiper device with the wiping lip has a plurality of connecting elements connecting the upper part and the lower part and which are spaced apart in the direction of longitudinal extension of the wiper blade. The connecting members permit relative movement of the upper and lower portions relative to one another with a movement component directed in the direction of longitudinal extension of the wiper blade. The wiper device is intended for a vehicle, especially a motor vehicle. The wiping lip is configured so that its rigidity in the wiping direction is greater than its rigidity in the direction perpendicular to the wiping direction. According to another development, the subject of the invention is a vehicle windscreen wiper device, in particular a motor vehicle, comprising an elongated, at least partially flexible upper part, an elongated at least partially flexible bottom part and several elements link connecting the upper part to the lower part. The connecting members are distributed and spaced along the main extension direction of the wiper blade to allow relative movement of the upper portion and the lower portion relative to one another with a motion component in the direction of the longitudinal extension of the wiper blade. The wiper device also comprises a wiper lip with a flexible beam, in particular a flexible beam provided with a wiping edge and a surface of the beam facing the wiping edge and perpendicular to the wiping direction, a slot or a cavity being adjacent to this surface.

The invention makes it possible to produce wiper devices with radiated structure (Fin-Ray) for vehicle windows in a particularly advantageous manner and / or suitable for a multiplicity of application areas. The embodiments of the wiper device according to the invention with such a wiping lip in the forms developed above allows a particularly good adaptation to the curvature of a window, which results in an excellent and precise wiping of the window. This wiping largely avoids areas of the glass that would not be wiped or on which would form a veil. The constructive construction of the lip thus described makes it possible to have a very even application pressure of the lip against the window, which contributes to the excellent quality of wiping and the reduction or even elimination of the noise, especially at the moment reversing the direction of movement of the wiper arm or wiper blade in its inverting positions. The wiping lip described can be very advantageously combined with wipers having a radially structured structure (Fin-Ray) because these structures are geometrically suitable for the use of the wiping lips described herein. According to a characteristic development, the gap or slot or cavity can be filled. For example, the slot or the cavity is filled with a gas, a medium that can be compressed or an elastic material, in particular whose compression modulus or modulus of elasticity is reduced by one. factor 2, for example at least a factor of 10 with respect to the modulus of compressibility or modulus of elasticity of the material constituting the flexible beam (or bending beam). According to some developments, the slot or cavity is filled with air. The slot or cavity may be filled wholly or partially with another medium or material. Thus, by a medium or material having a modulus of elasticity which is for example equal to 0.1 GPa or less than this value, the stiffness of the bending beam is sufficiently reduced in a direction perpendicular to the wiping direction . Thus the empty or filled slot or cavity will have sufficient rigidity for the wiping lip in the direction perpendicular to the wiping direction. In particular, the rigidity of the lip in the wiping direction will be greater than its rigidity in the direction perpendicular to the latter. According to other characteristic developments, the bending beam is connected by a base surface to or attached to the lower part or has an arm which extends from the base surface along the slot or of the cavity and in particular where the arm is at least partly perpendicular to the wiping direction from the base surface. This can be adapted, for example, by the geometry of the bending beam, for example the length of the arm following the slot or the cavity, which makes it possible to appropriately adapt the rigidity in the direction perpendicular to the wiping direction. . In addition, the rigidity in the wiping direction can be independently adapted. According to other configurations, we have another arm. There is thus the possibility of two wiping edges and / or the possibility that the arm or arms surround a basic structure of the wiping lip or the lower part of the wiper device. This way of wrapping simplifies the replacement of the wiping edge by wrapping the wraparound arm around the base structure. According to other characteristic developments, the wiping edge is integrated in the bending beam, in particular the wiping edge and the bending beam are made of the same material. Alternatively, the wiper edge is installed on the bending beam or it is applied as a coating on the bending beam, especially if the wiping edge and the bending beam are in different materials. In the case of the integrated version, the lip and if necessary even the wiper device, will be manufactured, finished directly at the output of the tool. Unlike this in the case of a version of the game there is a stage of assembly. But in contrast, this assembly facilitates replacement of the wiping edge and / or allows a more appropriate choice of materials for the wiping edge. These variants can be optimized depending on the application in either direction. According to another characteristic development, the wiping lip comprises another bending beam to reduce the rigidity in the direction perpendicular to the wiping direction, in particular another bending beam provided with another wiping edge and another surface of this other bending beam facing the other wiping edge in the direction perpendicular to the wiping direction with, adjacent to this other surface, another slot or other cavity or the slot or the cavity. This other bending beam avoids or reduces the rotation or straightening of the wiping lip. According to other characteristic developments, the wiper lip has in its direction of longitudinal extension, one or more tensile limiting elements in the slot in the cavity or in the other slot or in the other cavity. One or more tensile limiting members may close or terminate, as appropriate, the cavity. The traction limiting elements make it possible to reduce or eliminate the rotation of the wiper lip or its straightening. The traction limiting member avoids excessive straightening of the bending beam which could occur in both wiping directions. The traction limitation element may for example consist of a bent, bent or bent strut or as curved membrane, bent or bent so that the extension of the bend or the bend, stops the movement of the bending beam.

According to other developments, the beam or the other beam has a mainly L-shaped structure, a mainly C-shaped structure, a structure forming a closed cavity or a U-shaped structure. The structure may optionally be several layers and these different layers each have a wiping edge. The multi-layer construction makes it possible, when the wiping edge is worn, to remove a layer or to peel it off to clear the next wiping edge. According to developments of the invention which can be combined with other developments, the wiping edge has an angle of between 60 ° and 120 ° and this angle is in particular equal to 90 °. There is thus a wiping edge ensuring a particularly excellent wiping quality. According to developments that can be combined with other embodiments, the wiping edge is made of a material selected from the group consisting of TPE (Thermoplastic Elastomer), especially TPE-S, TPE-O, TPE-U, TPE-A, TPE-V, TPE-E; Ethylene-Propylene Rubber (EPDM); Polychloroprene and natural rubber. The choice of the material of the wiping edge makes it possible to adjust the physical properties of the wiping edge. The invention also relates to wiper devices equipped with wiping lips as defined in the embodiments above. By way of example, the bending beam may be made in one piece with the lower part, and in particular the bending beam and the lower part will be made of the same material. This results in a windscreen wiper device terminated at the tool outlet or a windscreen wiper device whose wiping edge alone changes and which nonetheless has the advantages of the wiping lips described above. Where appropriate, in place of or in addition to the interchangeable wiper edge there is also provided a wiper lip removably attached or removably attachable to the bending beam. . By separating the wiping lip and the lower part of the wiper device there will be a better possibility of selecting the materials for the different elements depending on certain applications. According to another development, the subject of the invention is a method for replacing a wiping edge, a wiper lip of a motor vehicle, in particular a wiping lip according to the developments described above. The method consists of inserting or sliding the wiper lip or the bending beam in the direction of the longitudinal extension of the wiping edge, which allows the replacement of the wiping edge with a cost of material reduced or very low for the part to be replaced.

According to another development, the subject of the invention is a method of replacing a wiper lip wiping edge of a vehicle wiper blade, in particular a wiping lip according to the embodiments of the invention. described above. The method involves peeling a layer to clear a new wiping edge. Thus after edge wear or according to the application can for example have a wiping edge winter or summer which is a simple solution to have new wiping edges. Drawings The present invention will be described in more detail below with the aid of embodiments of the wiping device wiper lips shown in the accompanying drawings in which the same elements bear the same references in the different FIGS. Thus: FIG. 1A is a sectional diagram of a windscreen wiper device provided with a wiping lip according to the invention; FIG. 1B is a sectional view of another wiper device; 1C is a detail of the wiping lip of the embodiments of the invention; FIG. 2 is a diagram of another wiper device according to the invention; with another wiper lip according to one embodiment of the invention, Figure 3 is a diagram of another wiper device with another wiper lip according to an embodiment of the invention. 4A is a diagram of a wiper blade of a windscreen wiper device according to the invention in the basic position, FIG. 4B is a diagram of the wiper blade of FIG. a windscreen wiper device according to FIG. 4A in a position applied against a window, FIG. 5A is a diagram of another embodiment of a windscreen wiper device. In the invention, in the form of a wiper arm incorporating a wiper blade in the basic position, FIG. 5B is a diagram of the wiper arm with the wiper blade. Figure 6 is a schematic perspective view of a wiper arm of a windscreen wiper device according to an embodiment of the invention. FIG. 7A shows a windscreen wiper device with a wiping lip according to one embodiment of the invention; FIG. 7B is an enlarged view of a detail in FIG. 7A, FIGS. 8A-8C are diagrammatic representations of wipe lip wiping edges and wiper blade device according to embodiments of the invention; FIGS. 9A, 9B, 10A, 10V are schematic representations of wiping lips in different operating states as well as characteristic diagrams explaining the functio FIG. 11 is a diagram of a wiping lip according to the invention with a pull-off element in two different operating positions; FIGS. 12, 13 14A-14C are diagrams of wiper lip fixing variants according to the forms of the invention to wiper devices also according to the invention; FIG. 15 schematically shows a succession of operations; of an injection process for the manufacture of wiper device according to the invention, - Figure 16 is a schematic representation of a wiper lip according to the invention showing two different operating states to explain the operation of bending beams, - Figs. 17A and 17B are schematic representations of other wiper devices having another wiping lip according to the present invention; - Fig. 18 schematically shows different stages. of the injection process for the manufacture of the wiper device as shown in Figs. 17A, 17B; Figs. 19A, 19B are schematic representations in different views of another windscreen wiper device with Another wiping lip according to the embodiments of the invention, - Figures 19A, 19B are schematic representations in different views of another wiper device with another wiper lip according to the forms of the invention. Fig. 20-23 are diagrammatic representations of other wiper devices with other wiping lips according to embodiments of the invention; Figs. 24A-24C are schematic representations according to embodiments of the invention; different sections and views of another windscreen wiper device with another wiper lip according to the invention, - Figures 25 and 26 are diagrammatic representations of other wiping lips according to the invention. FIG. 27 very schematically shows a simplified flow chart of the method of changing the wiping edge on wiping lips according to embodiments of the invention. DESCRIPTION OF EMBODIMENTS OF THE INVENTION FIG. 1A is a section along the longitudinal direction of a windscreen wiper device 2. The upper portion 10 and the lower portion 12 are connected by a plurality of connecting members 18 but in each of the sections shown, there appears only one connecting element 18. The realization of the wiper devices allows the embodiments described here wiping lips, because of the geometry wiper devices, to be integrated in a particularly simple manner as shown by way of example in Figures 4A, 4B, 5A, 5B and 6.

During the operation of the windscreen wiper device, the lower portion 12 is turned towards the window of the vehicle. The wiper device 2 has a wiping lip 102. The wiper lip 102 has a bending beam 104 as shown for example in FIG. 1A and a wiping edge 112 as it appears in FIG. example in Figure 1C. The bending beam 104 is made to leave an interval 106 between the bending beam 104 and the lower portion 12. The gap 106 increases the elasticity, i.e., decreases the rigidity in the direction perpendicular to the direction wiping. As shown by way of example in FIGS. 1A and 1B, the wiping direction here is the horizontal direction. This reduces the rigidity according to FIG. 1A in the vertical direction. The bending beam 104 has a wiping edge 112. As shown in FIG. 1C, this wiping edge has, for example, an undercut so that the wiping edge 112 can be slid over the bending beam. . In other embodiments that can be combined with the embodiments described herein, the wiper edge 112 may also be integral with the flex beam 104 which simplifies manufacturing. But in this case, the material of the bending beam 104 must also be suitable as a wiping edge 112 to have a satisfactory wiping result of this material in contact with the glass. In the embodiment shown by way of example in FIG. 1A, the lower part 12 and the flexural beam 104 consist of a single piece. For example, the lower part 12 can be made under the bending beam 104 during the same operation and / or from a single material. It is also possible to manufacture the wiper device 2 consisting of the upper part 10, the connecting elements 18, the lower part 12 and the bending beam 104 in one piece or that this device is provided in one piece. In this case, in particular for a wiper lip 112 integral with the bending beam 104, the wiper device 2 will thus be directly connected. According to other embodiments that can be combined and as described with the aid of the other figures, it is possible to fix or install a bending beam at the lower part 12. A realization in two parts or several parts of the lower part 12 and of the bending beam 104 is reflected in this context by a greater flexibility in the choice of material for the different components. Figure 1B shows another embodiment. In this case, the wiping wiper lip 102 has two bending beams 104. Thus, there will be two intervals 106 with each time an interval 106 between one of the bending beams 104 and the lower part 12. The developments Optionally, as for example in FIG. 1A, which concern the wiping lip and / or the manufacture may be applied in a similar manner to the embodiment of FIG. 1B. The bending beam 104 creates an interval 106 under a cavity that reduces the rigidity of the wiping lip 102 in the direction perpendicular to the wiping direction. Thus according to the embodiments of the invention, there will be a wiper lip having a certain rigidity in the wiping direction which is greater than that in the direction perpendicular to the wiping direction. This prevents the wiping lip from falling down. Tipping or tilting during vehicle operation results in disturbing, incidental noises. In certain embodiments that can be combined with those mentioned above and as shown in FIGS. 1A and 1B, the flexural beam 104 is made of the same material as the lower portion 12 or the wiper device 2, for example with a radiated structure (FIN-RAY). As interface with the glass, that is to say for cleaning, there will be an additional element made of a material such as rubber. To influence the stiffness or spring effect of the flex beam, a relatively advantageous model can be used. For the rubber edge, i.e., the wiper edge 112, a material of excellent quality, that is, expensive for the rubber edge, will be used; but so the quantity of this material used will be reduced to a minimum.

According to other embodiments which can be combined, the rigidity of the flexural beam can be varied according to the length of the windscreen wiper device 2, that is to say in the direction of longitudinal extension. the wiper device 2 to have a variable rigidity, that is to say, varying in space. Thus, it is possible, if appropriate, to adapt the existing supports to the force variations following the longitudinal extension of the windscreen wiper device 2 by a rigidity adapted to the bending beam 104. According to other embodiments, it is possible to have one or more slots 106 which are filled. In the most frequent case, the slot is not filled, that is to say that it will only be occupied by air or by ambient air. But it can also be filled with a compressible medium or an elastic material. This material has, typically, a modulus of elasticity which is at least reduced by a factor of 2 with respect to the modulus of elasticity of the material of the flexural beam 104, especially a material having a reduced modulus of elasticity by a factor 10. The embodiments shown by way of example in FIG. 1B and in the following figures comprise two bending beams 104. The two bending beams make it possible to have two wiping lips 112. a double use of the wiping edges 112. It reduces or eliminates the twisting or raising of the wiper device 2. This effect will be described in detail with reference to Figures 10A, 10B and Figure 16 .

Figure 2 shows another embodiment with two bending beams on the lower portion 12. A wiping edge 212 is fitted on the structure of the two bending beams 104; thus, there will be an edge coming into contact with the window during wiping. The wiper edge 212 or the bending beams 104 may include an undercut portion, which ensures the attachment during the fitting or crimping of the wiping lip 212 on the bending beams 104. next to the gap between each bending beam 104 and the lower portion 12 of the wiper device 2, there will be another cavity 106 shown in Figure 2. The cavity 106 will be designed to further influence the rigidity of the wiper lip perpendicular to the wiping direction. The fitting or crimping of the wiping lip 212 on the structure of a bending beam or as represented in FIG. 2, a structure formed of two bending beams 104 makes it possible to simply replace the wiper lip 212. a wiper device 2, for example a wiper blade "Fin-Ray" (windshield wiper radiated structure). This allows the sale to replace the wiping lip of a windshield wiper device. Since only the wiper lip is replaced, this reduces the amount of material for replacement and, among other things, is ecologically beneficial. FIG. 3 shows another embodiment of a windscreen wiper device 2 which also offers the possibility of simply replacing the wiper lip 102. By fitting or crimping a first bending beam 304 and a second bending beam 304 surrounds the lower portion 12 of the wiper device 2. Between the bending beams 304, there is a wiping edge 112. In addition, there is a cavity 106 between the bending beam 304 and the lower portion 12. The cavity 106 reduces the rigidity of the wiping lip in a direction perpendicular to the wiping direction. This produces wiping without tilting. According to some embodiments that can be combined with the embodiments described herein, a portion of the bending beam 304 facing the lower portion 12 has at least one stop 320 or at least one stop. This abutment or this stop makes it possible to limit the mobility of the wiping lip in a direction perpendicular to the wiper device. It is thus possible to reduce the rigidity of the wiping lip in the direction perpendicular to the wiping direction in a first partial region of the movement to be smaller than in a second partial region of motion. This means that in case of excessive deformation of the wiping lip, the rigidity will be reduced by stops 320 and stops. According to other embodiments that can be combined, one can also have only one stop or one stop. In addition, the stops and stops may also be on other bending beams to distribute the stiffness perpendicular to the wiping direction to have different rigidities in partial regions of the movement.

A wiper device will be described hereinafter by way of example with the wiping lip described above. But in principle, the described wiping lip can also be applied to other wiper devices. FIGS. 4A and 4B are diagrammatic representations of a wiper blade 2 in the basic position (FIG. 4A) and in position against a window (FIG. 4B) corresponding to embodiments of the device of FIG. wiper according to the invention. The wiper blade 2 is used to wipe a window 4 of a vehicle, for example a motor vehicle. Usually, the wiper blade is attached to a wiper arm, itself driven by a motor to perform the wiping motion. The wiper blade 2 comprises a fastener 6 receiving the wiper arm. The wiper blade 2 occupies its basic position in FIG. 4A in which it is raised at least partially from the window pane 4. The wiper blade 2 has a longitudinal extension 8 with an elongated upper portion 10 and a lower part 12 also elongated. The longitudinal extension of the upper part 10 and the lower part 12 corresponds essentially to the longitudinal extension of the wiper blade 2. Both the upper part 10 and the lower part 12 are flexural beams or can be made as bending beams which are each presented in one piece as an example in Figures 4A and 4B. This allows a particularly solid construction. However, it is also possible to make flexible only a fraction of the upper part 10 and / or the lower part 12. In addition, and in a variant, it is possible to make the upper part 10 in two parts, then each time a the ends of the two upper parts 10 connected to the attachment 6. According to embodiments which can be combined with other embodiments, the upper part 10 and / or the lower part 12 are used. a material having a modulus of elasticity in the range of 0.005 kN / mm 2 to 0.5 kN / mm 2 especially 0.01 kN / mm 2 to 0.1 kN / mm 2. This provides adequate flexibility for the upper part 10 and the lower part 12. In combination with an appropriate cross-sectional area of the upper part 10 and the lower part 12 there will thus be optimum flexibility. The upper part 10 and the lower part 12 are arranged to face each other. The two ends of the upper part 10 are integrally connected to the respective end of the lower part 12 at the outer connection positions 14, 16. Elsewhere, the upper part 10 and the lower part 12 are separated from each other . The upper part 10 and the lower part 12 are connected by connecting elements 18. In particular, in the basic position of the wiper blade 2, the connecting elements are directed substantially in the transverse direction to the direction of longitudinal extension 8 of the wiper blade 2. The connecting elements 18 are fixed to the inner long sides, facing each other of the upper part 10 and the lower part 12 by means of rotational joints 20 here constituted by hinges. The rotational joints 20 may in particular be constituted by film-hinges. This is especially advantageous if the upper part 10, the lower part 12 and / or the connecting elements 18 are made of plastic material or are coated with suitable plastic material.

According to the characteristic embodiments described herein and which can be combined, a rotation joint has been chosen in the group of elements comprising: a hinge, a film-hinge, a reduction of thickness of the material to have a lower rigidity along a torsion axis, an articulation with an axis of rotation, a means for connecting the upper part to the connecting element or for connecting the lower part to the connecting element which allows a sliding of the lower part relative to the upper part in the direction of longitudinal extension.

Embodiments in which the hinge is a hinge film thus constitute a simple way of making the joints of a wiper blade with a radially structured structure. The wiper blade 2 can be provided in one piece, especially directly at the tool outlet. According to various embodiments, the hinge films have a high extensibility. This can be done for example by a material selected from the group consisting of PP, PE, POM and PA. Alternatively, the hinge films may be made of one or more of the group consisting of TPE (thermoplastic elastomer), for example TPE-S, TPE-O, TPE-U, TPE-A, TPE-V and TPE. -E. The connecting elements 18 are spaced from each other in the direction of longitudinal extension of the wiper blade 2. The gaps between each time two adjacent connecting elements 18 are equal. But these differences can also be different. The differences are advantageously less than 50 mm, especially less than 30 mm. This results in a particularly high flexibility of the windscreen wiper device, in particular of its lower part and a good adaptation to the curvature and the variations of curvature of the window to be wiped. In FIG. 4A, the distances between each two connecting elements 18 are shown in a representative manner, for example an offset 22. The connecting elements 18 are in particular fixed in the basic position of the windscreen wiper blade. 2 at the lower portion 12 so that the longitudinal axis of the elements is at an angle 26 relative to the lower portion 12 and the angle is between 65 ° and 115 °, in particular between 75 ° and 105 °. In a particularly advantageous manner, the angle is between 80 ° and 100 °. This advantageously guarantees a particularly good transmission of the force acting on the lower part and transmitted to the upper part. In addition, in this way, one arrives at a particularly strong wiper device.

The same remarks apply to the fastenings of the connecting elements 18 to the upper part 10. The same remark applies in the present embodiment to the fastenings of the connecting elements 18 to the upper part 10.

FIG. 4A shows, by way of example, the longitudinal axis 24 representative of the longitudinal axes of the connecting elements 18 and similarly, for the angles, an angle 26 is shown between the connecting elements 18 and the lower part 12. The gaps between the upper part 10 and the lower part 12 are defined mainly by the lengths of the connecting elements 18. The length of the connecting elements 18 increases from the two external connection positions 14, 16 until substantially towards the positions In this case, the upper part 10 and the lower part 12 form a side view on the wiper blade 2 according to FIG. corner whose points are oriented in opposite directions. The connecting elements 18 are made so as to be rigid when folded. FIG. 4B schematically shows the wiper blade 2 of FIG. 4A in a position applied against the window pane 4. As the window pane 4 has a curvature, when the wiper blade 2 is applied against the pane 4, pushing or contacting forces are exerted on the lower part 12. As the upper part 10 and the lower part 12 are bending beams and the connecting elements 18 are mounted so as to rotate relative to the upper part 10 and the lower part 12, these two parts 10, 12 can slide relative to each other. Because of the pushing forces exerted from below on the lower portion 12, the wiper blade 2 flexes in the direction in which the pushing forces occur to precisely match the curvature of the window pane 4. By the structure In the embodiments described herein, there is a force acting on the lower part (by the window 4) so that the lower part flexes in the direction from which the force is coming. This results from the connection of the upper part 10 and the lower part 12 to the connection positions 14 and / or 16, of the shape and the rotational joints to the connection between the connecting elements and the upper part or the lower part. . In the representation of FIG. 4B, between the windscreen wiper blade 2 and the window pane 4, a small distance has been left here which serves only to make the window pane 4 and the windscreen wiper blade 2 explicit, while reality, when the wiper blade 2 is applied against the window 4, there is no gap. Further, typically, the underside of the inner non-facing portion 10 has a wiper lip 102 corresponding to the embodiments described above as shown, for example, in FIG. 1. to wipe the window 4. For the sake of clarity of the drawing, this wiper lip is not shown in Figures 4A and 4B. A wiper device such as that described above uses the effect of fish tail scales which do not yield under the effect of a lateral thrust in the direction of thrust but on the other hand take a convex shape in the opposite direction, that is to say in the direction from which the thrust arrives. This principle is also called the "End Ray" principle or principle of the radiated structure. Thus, a wiper device according to the embodiments described above has the advantage of better adapting to the window of the vehicle. While in the case of a conventional wiper blade, the upper part is generally rigid, that is to say it can not flex. Figures 4A and 4B show a wiper blade 2 having a longitudinal extension 8 which is substantially that between the connecting positions 14, 16. Such an arrangement is frequently used for the windshield wipers. As a variant, the windscreen wiper device may have only one connecting position so that, by analogy with FIGS. 4A and 4B, there is a half wiper device 2; for example, at the location of the attachment 6, there will be an axis of rotation. This arrangement often used for windshield wipers is represented for example, inter alia, in Figures 5A and 5B. Optional developments and details such as those described in the various embodiments can be used generally in both wiper device variants. FIG. 5A is a schematic representation of another exemplary embodiment of the windscreen wiper device according to the invention, in the basic position. The wiper device is constituted here by a wiper arm with an integrated wiper blade 2 to a fastener 30. The fastener 30 is connected to a windshield wiper motor 32 which drives the fastener 30 to wipe the window 4. The wiper blade 2 has a wedge shape with one end of the upper part 10 integrally connected to one end of the lower part 12 to the connecting position 34. The other end of the upper part 10 and that of the lower part 12 are connected to the fastener 30. The basic structure and in particular the fasteners of the connecting elements 18 corresponding to what has been presented. for the windscreen wiper device of FIG. 5A according to a principle representation. FIG. 5B is a schematic representation of the wiper blade 2 with an integrated wiper arm 30 according to FIG. 5A in its position against the window 4. In this case also pushing forces act from underneath from the window 4 to the lower part 12 of the wiper blade 2 so that the lower part 12 and the upper part 10 bend. In both FIG. 4A and FIG. 5A, the wiper blade is shown in a position not pressed against the window so that the lower portion 12 is substantially straight. According to other embodiments that can be combined with other embodiments in the unsolicited state, the lower part has a convex shape, that is to say with a curvature that goes away from the upper part in the central region. The wiper device according to the embodiments described herein may typically be in contact with a pane from the convex shape of the lower portion to then assume a concave shape suitable for the lower portion and marry the window. Figure 6 is a schematic perspective view of a wiper blade 2 of a wiper device according to the embodiments of the invention. As shown in FIG. 6, the wiper blade 2 has at the outer connection positions where the ends of the elongated upper portion 10 and the elongated lower portion 12 are connected to each other have a width outdoor WE. According to characteristic embodiments, the outer width WE is at least 15 mm, in particular at least 20 mm and more particularly at least 25 mm. According to the embodiments of the invention which can be combined with other embodiments, the width of the wiper blade 2 increases from the positions of outer links towards the fastener 30 or the fixing 6, where the wiper blade is attached to the wiper arm. Figure 6 shows as an example an inner width with the reference WM. According to characteristic developments, the internal width WM is at least 20 mm, in particular at least 25 mm and in particular, in particular equal to 30 mm. FIG. 7A shows another embodiment of the wiper device 2 having for example a radiated structure (Fin-Ray structure) or another embodiment of a wiping lip 102. The device of FIG. wiper 2 consists of an upper portion 10 and a lower portion 12 connected by connecting members 18. These connecting members are typically hingedly connected to at least the lower portion 12 to allow movement according to the principle of the radiated structure (Fin-Ray). The upper part 10 and the lower part 12 are connected to a connecting position at the front according to FIG. 7A. The upper portion 10 and the lower portion 12 are connected to a fastener 30. The fastener 30 allows attachment to an axis of rotation to scan the window or the attachment to a wiper lever. The lower side of the lower portion 12 has a flexure beam 104. The flexure beam 104 is shown on an enlarged scale in FIG. 7B. According to some embodiments described herein, and which may be combined with other embodiments, the bending beam is made of a resilient or rubber-like material which corresponds to the material of the wiping edge 112. In general, the bending beam 104, as shown by way of example in FIG. 7B, is made of a material other than that of the lower part 12. The bending beam may be made of a material having a module elasticity of between 1 MPa and 100 MPa.

Embodiments in which the bending beams 104 are of another material than the lower portion 12 are realized for example by applying the following method. Bending beam 104 is produced as an extruded part which is glued to the lower part or injected into the lower part. The bending beam 104 may be equipped with a claw connection means attached to the lower portion 12. Other removable connection possibilities are also conceivable. This makes it easy to install the flex beam as a spare part. In addition, the bending beam can be made by a two-component injection process. This case is for example described with the aid of FIG. 15. The wiping lip 102 as it appears in FIG. 7B comprises the bending beam 104 and the wiping stopper 112. Starting from its surface of base by which it is connected to the lower portion 12 of the wiper device 2, the bending beam has an arm shape which extends along the gap 106. The wiper edge 112 is provided on the arm, for example in the form of a dihedron constituting a corner. There is then an angle 703 or 705 on both sides of the dihedron 712. According to typical embodiments of the wiping lip which can be combined with other embodiments, the wiper edge 23 has a angle has between 60 ° and 120 ° and which is in particular equal to 90 °. Thus, the wiping lip will be applied with a good sealing effect between the lip and the glass and ensure excellent wiping quality.

The characteristic embodiments that can be combined with other embodiments have an angle 703 equal to the angle 705. In addition, the angles must remain as equal as possible, even under different operating conditions to allow quality to be achieved. as regular as possible. Means for reducing possible variations of the angle will be given in other embodiments. The wiping lip or the wiping edge may be made of one or more of the thermoplastic elastomer TPE group materials, for example TPE-S, TPE-O, TPE-U, TPE-A, TPE- V, TPE-E; Ethylene-Propylene-Diene Rubber (EPDM); chloropropene and natural rubber. The wiping lip 102 shown in the figures or the flexion beam 104 may be on the lower side of the lower part 12. For this purpose, the lower side of the radiating structure can be latched. The bending beam includes the arm extending along the gap 106. A dihedron 712 forms the wiping contact region. To have a good effect of cleaning the window of the vehicle it is necessary to arrive at a certain surface pressure between the wiping edge 112 and the window. Depending on the modulus of elasticity chosen, the material of the angle or dihedron 512 can be adapted to this angle or dihedron corner. The more the material of the angle of the wedge 712 is rigid and the more the corner angle can be reduced. The wedge can have a modulus of elasticity between 1 MPa and 100 MPa, between the angle being related to the modulus of elasticity. FIGS. 8A, 8B and 8C show various alternative embodiments of the wiping edges such that they can be applied to the wiping lips or to the windscreen wiper device. Figure 8A shows the wiping edge 112 made of the same material as that of the bending beam. For example, the tip can be realized by an optimized CPU process in friction and wear. According to typical embodiments of the wiping lip which may be combined with other embodiments, the wiping edge may be selected from one or more materials including: TPE (Thermoplastic Elastomer) such as TPE -S, TPE-O, TPE-U, TPE-A, TPE-V, TPE-E; Ethylene-Propylene-and Natural Rubber (EPDM); Polychloroprene and natural rubber. Fig. 8B shows a wiper edge 112 attached to the bending beam 104 or an arm of the bending beam 104. The undercut 804 of the bending beam with a shape 802 of the bending beam wiping 112 is an example of attachment of the wiping edge 112 to the bending beam 104. For example, it is possible to have a tip with a two-part embodiment, the tip having a lower coefficient of friction, for example tetrafluoroethylene .

FIG. 8C shows an embodiment which, similarly to FIG. 8A, corresponds to a wiping edge 112 in the same material as flexural beam 104. In addition, in FIG. 8C, the wiping edge 112 is provided with a coating 814 as is also possible for the other embodiments described herein. By way of example, the coating 814 may be a coating by a sliding film. In particular, the coating can be made by a PPC film. FIGS. 9A and 9B show different stiffnesses in the wiping direction FX (see FIG. 9B) and in the direction of the window FY. (See Figure 9A) which is perpendicular to the wiping direction. There is shown each time a bending beam 104 at the lower portion 12 of a windshield wiper device. There is a gap 106 between the flex beam 104 and the bottom portion 12. The wiping lips are returned to FIGS. 9A and 9B to facilitate the drawing so that the window to be wiped would be above the beam. bending 104. Fig. 9A and its diagram show stiffness in the direction perpendicular to the wiping direction. In this direction, there is between a force of 0 Newton and a force FY2, a flat characteristic curve which begins to increase more steeply from the SY2 position. In some embodiments, the region up to SY2 will be held as large and flat as possible. This makes it possible to optimally adapt the profile to the curvature of the window. There is also shown a position SY1 which describes the region corresponding to the weakest rigidity. The stop SY2 is comparable to the stop 320 of FIG. 3. To predefine the stroke SY2, a stop or stop can be used as in FIG. 3. In the wiping direction, as shown in FIG. 9B, according to FIG. the embodiments described here will have greater rigidity. Stiffness can be important in both directions so that at the reverse motion positions, the profile behaves stably when the force reverses. This corresponds to the diagram of Figure 9 with a steep slope curve.

As shown in connection with FIG. 10A and FIG. 10B, the rigidity in the negative direction according to FIG. 9B, that is to say under the action of a force exerted on the arm of the bending beam tends to decrease. This is because for a thrust against the bending beam, the beam recovers and / or the profile of the wiper device 2 recovers (see Figures 10A and 10B). The lever arm HO increases as well. The raising of the profile of a bending beam is as described in Figures 10A and 10B combines with a strengthening of the twisting of the wiper device, for example in the case of a radiated structure. The wiping direction 5, as shown in FIG. 10A, results in a force moving the bending beam 104 away from the lower portion 12. The twisting of the wiper device results in an additional increase h 1 of the distance between the window and the base of the bending beam. To avoid this tendency of bending beam 104 to rectify as shown in FIG. 11, a traction limiting member 152. The traction limiting member 152 connects the lower portion 12 to the beam Bending 104. By its shape and / or elasticity there is a certain movement of the bending beam 104 moving the bending beam 104 away from the lower part 12. Figure 11 shows, on the left side, the relaxed state of the tension limiting member 152. The bending beam 104 on the left side of Fig. 11 is, for example, in an unfilled state. Under the action of a force exerted on the wiping edge 112, as shown in FIG. 11, the bending beam 104 moves away from the lower portion 12. The traction limiting member 152 can thus arrive in a stretched condition as shown on the right side of FIG. 11. Under the effect of the force exerted on the wiping edge 112, as shown in FIG. 11, the flexural beam 104 is away from the lower portion 12. The traction limiting member 152 may arrive in a stretched state as shown on the right side of FIG. 11. The movement of the flex beam 104 is thus limited in the direction away from from the bottom part. According to the embodiments of the invention which may be combined with other embodiments, there may be a traction limiting member for limiting the movement of the bending beam in a direction away from the portion lower 12 or in a direction facing the window to be cleaned. The tensile limiting element may be an elastic tape, an elastic membrane, for example a zigzag film, a curved ribbon or a folded structure. This element limits the movement as shown in FIG. 11 as soon as the traction limiting element 152 arrives in its stretched state. In particular for embodiments in which the bending beam 104 and the lower portion 12 of the wiper device are for example made in one piece as a radiated structure, the traction limiting member 152 can be integrated in the structure and for example be carried out by an injection method at least with the lower portion 12 and the bending beam 104. Other embodiments of wiping lips and wiper devices, such as those used in particular for wipers radiated structure (Fin-Ray structure) are shown in Figures 12, 13 and 14A, 14B and 14C. These are wiping lips 102 attached to the lower part 12 of a wiper device by sliding, clamping or clipping. A wiping lip 112 can thus easily be replaced on the wiper device. For sale this also creates a possibility of replacement. In Figure 12, the wiping lip 102 includes a fastener 920 that slides or snaps onto the bottom portion of a wiper device. For example, the fastener 920 surrounds the lower portion of the windshield wiper device. Two U-shaped members 921 of the fastener 920 are used in this case. The U-shaped members surround or enclose the lower portion 12 of the wiper device. The wiper lip can thus slip, clip or pinch on the lower part of the wiper device. FIG. 13 shows another exemplary embodiment of a wiping lip 102 with a fastening element 920. The fastening element comprises at least one cylindrical segment 931 and in particular two cylindrical segments 931. These segments can be surrounded by corresponding undercut cylindrical portions 933, on the lower portion 12 of the windscreen wiper device to allow attachment of the wiping lip 102. Alternatively, in FIG. 13, in place of a wiper element 920 fastener having cylindrical structures, one can also use several spherical structures or in the form of ball joints and which also have an undercut. Typically, the multiplicity of spherical structures or spherical structures is distributed in the direction of the longitudinal extension of the wiper device. Unlike a cylindrical embodiment that requires fitting, gluing or clipping, it can be fitted with an embodiment with spherical structures or ball joints. On the other hand, there will be predefined manner, a position in the direction of the longitudinal extension 8 of the wiper device by the spherical structures which avoids any mounting error. Figs. 14A, 14B, 14C show another fastening structure with T-shaped members 142 on the lower portion 12 of the wiper device. These elements are shown segmented in Figure 14A but in other embodiments, these elements may also extend in the direction of longitudinal extension of the wiper device. The wiping lip 102 shown in FIG. 14B comprises the bending beam 104 with the wiping edge and a fixing element 146. In a similar manner to FIG. 12, the fixing element is made with the element fastener 146 to surround the T-shaped fasteners 142 of the lower portion 12. As shown in FIG. 14B, the flex beam 104 and the fastener 146 may be made of different materials. . For example, they can be obtained with a two-component injection process. This makes it possible to choose, independently of one another, the properties of the material of the bending beam 104 and of the fixing element 146. FIG. 14C shows the wiper lip 102 installed on the lower part 12.

As already indicated, a wiping lip according to the embodiments of the invention may be integrally joined to the lower part of a windscreen wiper device. This is done for example by gluing or by a two-component process, for example a two-component injection process. Figure 15 schematically shows different operations of such an injection method. First, a lower injection mold 502 and an upper mold or upper injection mold 504 are joined together. A cavity is thus formed for injecting the workpiece. The part 12 is made in the cavity formed between the lower mold and the upper injection mold. For example, the cavity is filled with a synthetic material. Then the upper mold 504 or the upper tool half is removed and the blank is extracted. A second upper injection mold is installed which for example has a cavity of the profile with a structure corresponding to that of the flexural beam 104. In addition, another forming element or injection tool 515 is used which defines the gap between the lower part 12 and the bending beam 104. By injecting the synthetic material into this cavity, the bending beam 104 is made. After having removed the lower injection mold 502 the second upper injection mold 512 and the other injection tool 515, that is to say when the injection mold has been opened, a structure made of a material 12 and a flexural beam 104 with a wiping edge 112 in the form of embodiment of the invention. As the filling of the first cavity and that of the second profiled cavity using different materials, one can thus inject a two-component profile. Embodiments of the invention provide wiping lips which reduce or prevent folding in the reversing position of the windshield wiper device. According to typical embodiments, the rigidity is reduced in the direction perpendicular to the wiping direction. The rigidity in the wiping direction may, for example, be greater than that in the direction perpendicular to the wiping direction. Some of the embodiments described herein develop a bending beam 104 which may be described as a single profile. The rigidity is formed or influenced by a slot or a cavity of the bending beam. The bending beam typically has a structure such that an interval or slot or cavity between the bending beam and the lower portion of the wiper device is developed. position located between the bending beam and the lower part in the direction perpendicular to the wiping direction, at the wiping edge. According to embodiments of the invention that can be combined with other embodiments, a bending beam or other deformable member is provided to reduce stiffness in the direction perpendicular to the wiping direction. This is in particular a bending beam having a wiping edge and a surface of the bending beam facing the wiping edge in the direction perpendicular to the wiping direction and with a slot or cavity adjacent to this facing surface. According to characteristic embodiments, the bending beam has a base surface through which the bending beam is connected or can be connected to the lower part. An arm extends from the base surface along the slot or cavity gap and in particular the arm extends at least in part in the wiping direction from the base surface. The wiper lip may include a wiping edge. According to the characteristic embodiments, the wiping lip has at least one of the following dimensions: the base surface typically has a size of between 3 mm and 6 mm in the wiping direction; the gap or cavity in the direction of wiping has a length of 3 mm to 10 mm. This typically results in a dimension of the base surface gap to a perpendicular through the position of the wiping edge of between 3 mm and 8 mm. The height of the slit gap, or cavity, i.e. the slit or cavity gap dimension in a direction perpendicular to the wiping direction is 3 mm to 8 mm. As described with reference to Figures 10A and 10B, such a structure tends to straighten and / or to exhibit a twisting effect for the windshield wiper device. One possibility according to the embodiments of the invention that can be combined with other embodiments of the invention is to reduce or avoid rectification or twisting in the FX direction by duplicating the bending beam or the mono -profile. For example one can symmetrically duplicate a bending beam or a single profile. This is shown in Figure 16. In this embodiment, each time a wiping edge operates in push mode and a wiping edge operates in pull mode. The recovery in the case of the thrust mode will be limited or eliminated because in this case the second profile that works in traction mode touches the glass or mainly touches the glass. Thus the friction force on the first mono-profile (thrust mode) decreases. According to the profile work in traction mode and thus replaces the first profile that would work with a strong contact in push mode. Thus, according to the embodiments of the present invention, there is a structure such that each time a bending beam or a profile mode wipes the window while operating in traction mode. The slight inclination that occurs then tends that each time the other bending beam or the other single profile does not touch the glass or touches it only slightly and thus reduces or completely remove the push mode and / or the recovery. Such a development of the wiper device is for example shown in Figures 17A and 17B. Figure 17A shows a wiper device 2. A fastener 30 is shown in the lower part of the figure. The representation is a view from above of the lower side of the windscreen wiper device 2. According to FIG. 17A, a first bending beam 104 and a second bending beam 104A extend along the longitudinal extension of the wiper device. 2. The bending beams are on the outer sides of the wiper device. Thus the first wiping edge 112 and the second wiping edge 112A are spaced a distance greater than the distance shown in FIG. 17B. The wiper device 2 shown in FIG. 17B has a similar structure. In this case, the first bending beam 104 and the second bending beam 104a are closer to the middle of the lower side or the lower part. The wiping edges 112 or 112a are substantially parallel to one another in the direction of longitudinal extension of the wiper device 2. According to other embodiments, the positions of the bending beams are chosen. 104 or single profiles to be in positions between that shown in FIGS. 17A and 17B. Despite the semi-profile, it is also possible to realize such an embodiment of the invention by a two-component injection method. This is shown schematically in Figure 18 which shows the operations of such an injection method. First, a lower injection mold 502 and an upper injection mold 504 or another tool are joined together to form a cavity for injection. The lower part 12 will be made in the cavity formed by the meeting of the lower mold to the upper mold. The cavity is filled with the plastic material. Then, the upper mold 504 or the upper half of the tool is lifted and removed. A second upper mold 524 is installed, for example a profiled cavity which has a structure corresponding to that of the bending beam 104. In addition, another forming element or injection tool 525 is used which defines the intervals between the lower part 12 and the bending beam 104. By injecting plastic material into the cavities thus produced, the bending beams 104 are obtained. After having removed the lower injection mold 502, the second upper injection mold 524 and the that the other injection tool 525, that is to say when the complete mold has been opened, a structure is obtained composed of a lower part 12 and flexural beams 104 with the wiping edges 112 according to embodiments of the present invention. As for the filling of the first cavity and that of the second profiled cavity, it is possible to use different materials, this makes it possible to inject a two-component profile. Other embodiments of the wiping lips and the wiper device according to the present invention will be described hereinafter with reference to Figs. 19A and 19B. Figure 19A is a section of a wiper device perpendicular to the direction of the longitudinal extension of the wiper device. Figure 19B shows a section in the direction of longitudinal extension of the wiper device. The upper part 10 is connected to the lower part 12 by connecting elements 18. This produces a radiated structure (Fin Ray structure). As shown in FIG. 19A, the lower portion 12 of the wiper device comprises a wiper lip 102. The wiper lip 102 surrounds a fraction of the lower portion 12. Thus, the wiping lip 102 can pinch the lower portion 12, be clamped therein, be glued or be fitted on the lower portion 12. The wiper lip 102 has a bending beam 104 and a wiper edge 102. An interval 106 remains between the Bending beam 104 and lower part 12. As shown in the view of FIG. 19B, between the bending beam 104 or the folding edge 112 and the lower portion 12 of the windscreen wiper device, there are several elements. These elements are shown in the form of bent struts in FIG. 19B. During the straightening of the bending beam 104, the struts extend, that is to say that their curvature disappears and they take a stretched position which limits the straightening in thrust mode. Traction limiting members 152 may also include traction ribs or other transverse struts with a corresponding profile; this profile limits the excessive recovery of the bending beam. Fig. 20 shows another embodiment for combining aspects and details from other embodiments as well. The wiping lip shown in Fig. 20 has two bending beams 104. Bending beams 104 extend from the base surface. The base surface is connected to the lower portion 12 of the wiper device. Between the bending beams 104 and the base surface and / or the lower part 12 there can be traction limiting elements 152. As shown in a similar manner to FIG. 19B, in the direction of longitudinal extension of the device In some embodiments, the traction limiting elements 152 are combined with a wiping lip with two wiping edges. Both of these aspects reduce or reduce the recovery of the windshield wiper device.

Figure 21 shows the other embodiment which, similarly to Figure 19A, relates to wiping lips with a bending beam on the lower portion 12 of the wiper device. The embodiment shown in FIG. 21 corresponds to a bending beam having a wiping edge on both sides of the lower portion 12. The two bending beams make it possible to reduce or avoid straightening. In addition, as shown with reference to Figs. 19A and 19B, there are spacers or tensile limiting members 152. Fig. 22 shows further embodiments of the invention. It is a wiping lip 102 with a C-shaped bending beam 104 leaving an interval and / or a cavity in this C-shaped section. The lower end of the bending beam has an angle corner of which constitutes the wiping edge 112. In a similar manner to FIG. 22, FIG. 23 shows an embodiment with two bending beams 104 having a shape of C. These beams are provided on the sides of the part. lower 12 of the windscreen wiper device. Alternatively, the bending beams may also be on the lower side of the lower portion 12. Figs. 24A, 24B, 24C show alternative embodiments of the wiping lips according to the embodiments of the invention. The wiper lip 102 is attached to a windshield wiper device. The wiper device, as shown in the figures is constituted inter alia by an upper portion 10, a lower portion 12 and connecting members 18 connecting the upper portion and the lower portion. Fig. 24A is a first sectional view perpendicular to the direction of longitudinal extension of the wiper device; a first position has been chosen in the direction of the longitudinal extension. Fig. 24B is an analogous view corresponding to a second position in the direction of the longitudinal extension. Figure 24C is a section along the longitudinal extension. The wiping lip 102 is constituted by bending beams which develop gaps or cavities 106. Thus, the open side of the gap of the cavity changes in the direction of the longitudinal extension of the windscreen wiper device. . This is shown in Figure 24C. A first interval 106 is shown open in FIG. 24C while the neighboring interval is shown in broken lines, illustrating the fact that this neighboring interval is open on the opposite side from that of the first interval 106.

The bending beam 104 has a base surface that is attached to the lower portion 12 of the wiper device. The gaps or cavities decrease stiffness in the direction perpendicular to the wiping direction. In addition, the bending beams can be made in the form of a bending beam with two wiping edges 112.

The use of two wiping edges is reflected in greater detail above by reducing or eliminating wiper blade wiper lip straightening. Since the gap in the direction of longitudinal extension of the windscreen wiper device is partially open on the right side and partly on the left side, the profile rectification is also reduced. wiping. The each closed side of the flex beam 104 functions as a traction limiting member. Thus, as the opening side varies or alternates in the direction of longitudinal extension, there are thus elements similar to tensile limiting elements on both sides of the wiping lip 102. Other developments wiper lips with gaps or cavities may also be described in connection with FIG. 25. The lower portion 12 of a windscreen wiper device comprises bending beams 104 which, by way of example, have a circular section. Alternatively, they may also have an oral section or any other form. The bending beam is constructed as a hollow member, i.e., there will be a cavity which reduces stiffness in a direction perpendicular to the direction of wiping. The opposite side of the window corresponds to a bending beam with a corner provided with a wiping edge 112. The fixing is done for example by means of a cylindrical element and a corresponding element with undercut or other type described. Figure 26 shows other possibilities of realization which can complete the aspects already described. This is a lower portion 12 of a wiper device having a plurality of bending beams. Each of the bending beams 104 has a respective wiping edge 112. In Figure 26 there is shown by way of example three layers of bending beams 104, 104b, 104c. The bending beams each have a wiping edge 112, 112b, 112c. The respective bending beams are presented as superposed layers which can for example be extruded. These layers will be peeled, which involves removing the outer wiping edge to use the wiping edge underneath.

For example, the inner profile in the field of spare parts trade may be peeled to have the correct profile or be peeled by the user when the wiping edge will be worn. This makes it possible, for example, to have different wiping edges according to the application and to have, for example, a winter profile and a summer profile, each time by removing the covering profile. In addition, in the event of wear of a wiping edge 112, a new wiping edge can be disengaged by peeling off the used wiping edge without having to install a new wiper lip. Figure 27 shows a very simplified flow chart of several methods for obtaining a wiping edge on a windscreen wiper device, in particular a Fin Ray windscreen wiper. As described in the above embodiments, a wiping lip, a bending beam, or a wiping edge of the windshield wiper device is separately provided. We can have spare parts that consume little material. For the embodiments described here, it is possible to envisage other methods of providing and replacing a wiping edge of a wiping lip, of a wiper device of a motor vehicle. In step 262 the wiping lip, a bending beam or a wiping edge which is made or made available is produced. In step 264, the wiping lip, the bending beam or the wiping edge are installed. This can be done, for example, by retrofitting, gluing, plugging or snapping.5 NOMENCLATURE OF THE MAIN ELEMENTS 2 Wiper device 4 Glass 6 Fixing 8 Longitudinal extension direction Upper part 12 Lower part 14 External connection positions 10 18 Element 20 Swivel joint 30 Fixing part 102 Wiper lip 104 Bending beam 106 Slot / gap / cavity 112 Wiper edge 142 Fixing element 146 Fixing element 152 Traction limiting element 212 Wiper edge 304 Bending beam 320 Stop / Stop 502 Lower injection mold 504 Upper injection mold 512 Upper injection mold 515 Injection tool 524 Second upper injection mold 525 Other injection tool 703, 705 Angle 712 Angle of wedge / dihedral 920 Fastening element 921 U-shaped element 931 Cylindrical segment35

Claims (3)

CLAIMS 1 °) wiping lip (112) for a wiper device comprising a wiper blade (2) consisting of an elongated upper portion (10) at least partially flexible, a lower portion (12) at least partially flexible elongation, a plurality of connecting elements (18) connecting the upper part (10) and the lower part (12) being spaced apart in the direction of longitudinal extension (8) of the wiper blade (2), the connecting elements (18) allowing relative movement between the upper part (10) and the lower part (12) with a movement component in the direction of longitudinal extension (8) of the wiper blade. ice (2) and the wiper device (100) is adapted to a vehicle, in particular a motor vehicle, the wiper lip comprising: - a bending beam (104) for reducing the rigidity in the direction perpendicular to the wiping direction, especially a p bending member (104) having a wiping edge (112) and a surface facing the wiper edge (112) perpendicular to the wiping direction, adjacent said surface facing a a slot or cavity (106). 2 °) wiper lip (102) according to claim 1, characterized in that the slot or the cavity (106) is filled or not in particular with a gas, with a compressible medium or with an elastic material. The wiping lip (102) according to claim 1, characterized in that the bending beam (104) further comprises - a base surface through which the bending beam (104) is connected to the bending beam (104). lower part (12); - an arm extending from the base surface along the slot or the cavity (106) .4 °) wiping lip (102) according to claim 3, characterized in that the bending beam (104) has another arm extending from the base surface along the slot or cavity (106). 5 °) wiping lip (102) according to claim 1, characterized in that the wiping edge (112) is integrated with the bending beam (104) and in particular the wiping edge and the beam of bending are performed in the same material. 6 °) wiping lip (102) according to claim 1, characterized in that the wiping edge (112) is installed on the bending beam (104) or is constituted by coating of the bending beam, in particular the wiping edge and the bending beam are in different materials. 7. The wiping lip (102) according to claim 1, characterized in that it further comprises a further bending beam (104, 104a) for reducing the rigidity in the direction perpendicular to the direction of the wiping, in particular another bending beam (104, 104a) with another wiping edge (112, 112a) and another surface of the bending beam facing the other wiping edge, perpendicular to the direction of wiping wiping and adjacent to the other facing surface, there is another slot or another cavity or the slot or the cavity (106). 8 °) wiping lip (102) according to claim 1, characterized in that in the direction of the longitudinal extension of the wiping edge (112) there is one or more tensile limiting elements (152). in particular the tensile limiting element or elements are in the slot, in the cavity in other slots or in other cavities.9 °) Wiper lip (102) according to claim 1, characterized in that the bending beam (104) or the other bending beam (104a) has a predominantly L-shaped structure, a predominantly C-shaped structure, a structure developing a closed cavity or a U-shaped structure. 10 °) wiper lip (102) according to claim 9, characterized in that the structure consists of several layers and each having a wiping edge. 11 °) wiper lip (102) according to claim 1, characterized in that the wiping edge has an angle between 60 ° and 120 ° and in particular equal to 90 °. 12 °) wiper lip (102) according to claim 1, characterized in that the wiping edge is made of a material composed of TPE (thermoplastic elastomer) including TPE-S, TPE-O, TPE-U, TPE -A, TPE-V, TPE-E; Ethylene-Propylene-Diene-Rubber, chloro-propylene and natural rubber. 13 °) Wiper device (100) of a vehicle, in particular a motor vehicle, comprising an elongate upper part (10) at least partially flexible, an elongate part (12) at least partly flexible, several connection elements (18) connecting the upper part (10) to the lower part (12), these elements being spread apart in the main extension direction (8) of the wiper blade (2) and the connecting elements allow a relative movement of the upper part (10) and the lower part (12) relative to one another with a movement component in the longitudinal extension direction (8) of the wiper blade (2) and a lip wiping device (102) according to one of claims 1 to 12. 14 °) Wiper device according to claim 13, characterized in that the bending beam (104) is made in one piece with the part lower part (12) and in particular the lower part ( 12) and the bending beam (104) are made of the same material. Windscreen wiper device according to Claim 13, characterized in that the lower part (12) has a lower side facing towards the wiping edge (112) and two side surfaces and the wiping lip ( 112) is mounted on the lower side or at least one of the two side surfaces. 16 °) A method for supplying or replacing a wiper lip of a motor vehicle windscreen wiper, in particular a wiping lip according to one of claims 1 to 12, comprising the step comprising: engaging the wiping lip (102) or bending beam (104) in the direction of the longitudinal extension of the wiping edge (112). 17 °) A method of replacing a wiping edge, a wiper lip of a motor vehicle wiper, in particular a wiping lip according to one of claims 10 to 12, comprising the step of peeling a layer to clear a wiping edge (112, 112b, 112c).