FR2998221A1 - GLASS, IN PARTICULAR WINDSHIELD OF MOTOR VEHICLE - Google Patents

Abstract

Motor vehicle window (15) having a glass body (21), preferably made of composite glass, whose outer side (90) comprises a coating (100) pushing the liquid (96), and a marginal region (95) on the side exterior (90) extending from the side edge (30) inwardly to the outer side (90) of the window body (21). The coating (100) is exclusively provided in the marginal region (95) extending inwardly from the side edge (30), mainly from 1 to 10 cm.

Description

FIELD OF THE INVENTION The present invention relates to a window of a motor vehicle comprising a glass body preferably made of composite glass whose outer side comprises a coating repelling the liquid, and a marginal region on the outer side which extends to from the side edge inwards on the outer side of the glass body. STATE OF THE ART According to document GB 2 357 541 A, a motor vehicle equipped with a windscreen and a wiper installation is known. The wiper system includes a wiper blade movable between a first inverting position in the lower region of the windshield and a second inverting position in the side region of the windshield, thereby defining a range wiping. The water repellent coating is provided exclusively in the wiping area of the windshield. When wiping a wet windshield in the area of the coating, the wiping phase results in a brief and slight whitish cloudiness of the windshield which reduces the visibility of the driver especially when the windshield wipers are moving rapidly and the wiper blade frequently moves into the driver's visibility range. In addition, on regions not coated windshield, it develops a film of water, closed, complicating the accumulation of water repelled by the wiper blade. To avoid the whitish opacification associated with the wiping phase, it is necessary to specially grant the water-repellent coating and the wiper blade. Also known are windscreen wiper blades equipped with a deflector to ensure application of the wiper blade against the windshield at high traffic speeds. But the deflector produces in its second inversion position, in the side region of the windshield, a vortex behind the wiper blade between the column A and the second inversion position so that the air in turbulence passes on the surface of the windshield in the direction of the return movement of the wiper blade to its first inversion position. At the return of the wiper blade from its second inversion position to its first inversion position, the water that has just been wiped is brought back into the wiped region, deteriorating the visibility of the driver. OBJECT OF THE INVENTION The present invention aims to develop a better window including a better windshield of a motor vehicle ensuring better evacuation of water already wiped. DESCRIPTION AND ADVANTAGES OF THE INVENTION To this end, the subject of the invention is a vehicle window of the type defined above, characterized in that the coating is exclusively provided in the marginal region and this marginal region extends inwards. from the side edge mainly on 1 to 10 cm. In other words, according to the invention, it has been recognized that one could have better characteristics of evacuation of water from a window, in particular from a windshield, if the window pane has a window pane body. composite glass having on the outer side a water repellent coating and a marginal region located laterally on the outer side of the glass body, the marginal region extending from the lateral edge of the glass body, to the inside starting from the outside of the glass body. The water repellent coating is provided exclusively in the marginal region which has an extension of substantially 1 to 10 cm from the side edge of the glass body inwardly. The invention has the advantage that the wiper blade makes it easier to evacuate water already pushed back from the sweeping region by the flow wind towards the column A and / or the upper edge of the windscreen. -broken. It is further avoided that under the effect of turbulence between the wiper blade and the side edge, the wiper blade does not bring this water into the wiped region; In this way, it is safe to reduce visibility by returning water. According to another development, the water-repellent coating is developed in a meander shape in the marginal region of the glass body which reduces the reversal direction folding noise in the second broom reversal position. wiper.

Water drawn from the wiping region by the wiper blade flows particularly well if the water-repellent coating completely covers the marginal region. According to another development, the marginal region has a first and at least a second segment, the two segments being spaced from each other and the water-repellent coating being provided in the first and second segments. This reduces both the draw noise and the targeted removal of the water removed from the wiping area by the two segments with a water-repellent coating. The water is particularly easily guided towards the upper edge of the windshield if the first and second segments are parallel to the side edge of the window (windshield). Particularly large quantities of water, particularly in the case of windshields, for example those of trucks or coaches, can thus be evacuated if the first segment is parallel to the lateral edge of the window body and the second segment is inclined with respect to first segment. In addition, this embodiment reduces the folding noises of the wiper blade on the window thus increasing the comfort of circulation in rainy weather. According to another development, the first and the second segments are parallel and inclined relative to the lateral edge of the window body so that the wind of circulation and thus the wind-swept windshield makes it possible to evacuate very simply large quantities water from the sweeping range on the side towards the column A. It is also particularly advantageous that the first and the second segment overlap. The invention also aims to develop a better wiper system of a motor vehicle with a wiper system and a better windshield. To this end, the subject of the invention is a motor vehicle windscreen wiper system comprising a windscreen wiper and a windscreen wiper system, the windscreen wiper system having a wiper arm carrying a windshield wiper arm. a wiper blade and a wiper drive coupled to the wiper arm and the wiper blade is movable between a first inverting position in the lower region of the window and a second position in the lateral region near the column A of the vehicle, the marginal region lying at least partly between the second inversion position and the side edge of the window. In other words, according to the invention, it has been recognized that the visibility range can be particularly clear in case of heavy rain if the wiper system comprises a wiper and a window as described above. The wiper system has an arm having a wiper blade and a drive coupled to the wiper arm for moving the wiper blade to a first inversion position in the region. lower part of the window and a second reversing position in the lateral region of the window, at the level of the column A of the motor vehicle, for setting a wiping range and the marginal region is situated between the second inversion position and the side edge of the window. Drawings The present invention will be described in more detail below with the aid of a motor vehicle window shown in the accompanying drawings in which: FIG. 1 is a diagrammatic view from above of a wiper system; Figure 2 is a partial sectional view of the wiper system of Figure 1 along the section plane BB; Figure 3 shows a detail of the wiper system of Figure 1 with a marginal region. Fig. 4 is a schematic top view of a coating according to a first embodiment of the invention, Fig. 5 shows a schematic top view of the coating according to a second embodiment. embodiment of the invention; FIG. 6 is a diagrammatic view in plan view of a third embodiment of a coating according to the invention; FIG. 7 is a diagrammatic plan view of a fourth embodiment; embodiment of the invention, e Figure 8 is a schematic top view of a fifth embodiment of a coating. DESCRIPTION OF EMBODIMENTS OF THE INVENTION FIG. 1 is a schematic top view of a wiper system 10 of a motor vehicle 15. The vehicle 15 has on both sides a window 20, a window body 21 preferably composite glass and in one embodiment as a windshield, there are columns A 25, 26. The first column A 25 on the right side of Figure 1 and the second column A on the left side of the 1 are respectively located on a lateral edge 30 of the pane 20. The pane 20 is fixed by a not shown bonded connection or by a peripheral sealing element, between the pane 20 and the column A, 25 to the vehicle 15. The The wiper system 10 further comprises a windscreen wiper system 35 with a windscreen wiper drive 40 installed under the window 20. The wiper drive 40 comprises a windscreen wiper shaft 45 integral in rotation with a windscreen wiper arm 50. A windscreen wiper blade 60 is t connected to the wiper arm 50 by a fastener 55. The wiper drive 40 moves the wiper blade 60 between a first inverting position 65 in the lower region 70 of the wiper blade 60. window 20 on the side of the wiper drive 40 and a second inversion position 75 in the lateral region 80 of the window 20 thereby developing a wiping area 85 to remove dirt including the water film the outer face of the pane 20. The marginal region is in the region of the column A 25. The water removed from the wiping range 85 by the movement from the first inversion position 65 to the second position inversion 75 by the wiper blade 60 arrives in the marginal region 95. In the embodiment of FIG. 1, the marginal region 95 is located between the second inverting position 75 and the lateral edge 30 of the window 20 in the direction of its width. The length of the marginal region 95 is defined by the length of the wiper blade 60 in its second inverting position 75. To facilitate the flow of the liquid 96 wiped by the wiper blade 60 of the range in the marginal region 95, this region 95 has a coating 100 applied on the outer side 90 corresponding to the wiper blade 60. The liquid considered 96 is generally water. But the wiper blade 60 can also wipe other liquids and / or mixtures of liquids and / or liquid / solids mixtures from the wiper pad 85 to discharge them into the marginal region 95. The coating 100 is preferably hydrophilic i.e. it repels water. The coating 100 may also repel other liquids for example oil, other types of liquids and / or mixtures of liquids and / or mixtures of liquids and solids. The term "repelling" means that the contact angle between the outer side 90 and a liquid droplet 96 is at least 90 °, preferably greater than 110 ° and particularly preferably greater than 130 °. The coating 100 causes the liquid of the marginal region 95, which has been cleared from the wiping pad 85, to form beads on the outer side 90 of the pane 20 which are very easily driven by the circulation wind following the curvature of the pane. the window 20 in the marginal region 95 towards the column A 25 and / or upwards towards the upper edge 105 of the window 25. The upper edge 105 is located on the side of the window 20 opposite the the wiper drive 35. At low speeds, the liquid 96 released from the wiping range 85 flows due to the coating 100, under the effect of its weight towards the lower region 70 of the wiper. window 20 which allows to safely release the liquid from the marginal region 95 and effectively avoid accumulations of liquid released from the wiping range 85 to the marginal region 95. Figure 2 is a schematic sectional view along the plane section BB of Figure 1 The wiper blade 60 is equipped in this case with a deflector 110 to increase the application force Fp of the wiper blade 60 at high traffic speeds. The wiper blade 60 also has a wiper lip 115 applied to the outer side 90 of the window 20. The wiping lip 115 is connected by an articulated area 120 above the wiping lip 115. the elastic rail 125 of the wiper blade 60. On the upper side, that is to say on the upper side of the elastic rail 125 not facing the window 20, there is the deflector 110 on the elastic rail 125. The deflector 110 may be integrated in the elastic rail 125 but alternatively it may also be a separate component connected by a connection to the elastic rail 125. It is also possible to envisage a different embodiment of the windscreen wiper blade. 60 for example without the deflector 110. When during the movement of the wiper blade 60, air passes over the deflector 110 when the blade moves between its second inverting position 75 to its first inversion position 65, a vortex 130 forms in the r the sidewall 90 has a direction of flow from column A 25 towards the deflector 110 of the wiper blade. It follows that for the usual windows, the film of water which is in the marginal region 95 is returned by the speed of circulation and the return movement of the wiper blade 60, in the place wiped 85. Due to the water-repellent coating 100 in the marginal region 95, the liquid discharged from the wiping area 85 forms beads evacuated due to the curvature and / or inclination of the vehicle window 20 In the lower region 70 of the window 20 by their flow under the effect of weight or in the direction of the column A 25 or the upper edge 105 being blown due to the high speed of circulation of the vehicle, and this before the wiper blade 60 comes back into its return movement from its second lower inversion position 75 to its first inversion position 65. This prevents the liquid 96 discharged from the wiping range 85 from returning to this wiping range 85. FIG. 3 shows a portion of the wiper system 10 of FIG. 1. As shown in FIGS. 1 and 2, the marginal region 95 includes the coating 100. The marginal region 95 for the window 20 of FIG. preferably in a range between 1 to 10 cm from the side edge 30 of the window 20 corresponding to the first column A 25, inwardly or parallel to the upper edge 105 towards the second column A 26, opposite (no shown in Figure 1). Particularly advantageously, the marginal region 95 has a width b or an extension towards the upper edge 105 of between 2.5 and 5 cm. This ensures that the marginal region 95 is secured between the second inverting position 75 of the windscreen wiper system 35 and the column A 25. This is particularly advantageous in that the second inversion position 75 depends on the friction conditions in the wiping area 85 on the window body 21 and thus also the wetting of the wiping area 85 with the liquid 96 and that depending on the friction conditions will have a different spacing between the column A 25 and the second inverting position 75. If the marginal region 95 has the width (b) mentioned above, this ensures that the liquid 96 released from the wiping area 85 at the return of the wiper blade. The wiper 60 will not be re-aspirated by the vortex 130 into the wiping range 85. FIG. 4 shows a first embodiment of the liner 100 in the marginal region 95. The marginal region 95 is completely covered by the liner 100 which guarantees that the liquid 96 flows over the coating 100 as described above. If the marginal region 95 is completely covered by the coating 100, it results that according to the disposition of the axis of rotation 45, during its re-entry or exit movement in the marginal region 95, the wiper blade 60 relies only partially against the marginal region 95 and thus on the coating 100. In addition the coating 100 has a low coefficient of friction between the coating and the sealing lip 115 that is to say between the outer side 90 and the sealing lip 115 in the wiping region 85. In this embodiment, the second inverting position 75 is partly in the marginal region 85. Alternatively, it can also be envisaged that the second position of The inversion 75 is completely in the marginal region 95 or adjacent to the marginal region 95. In the second inverting position 75, the wiper blade 60 has a first lower segment 130 in which the lip ess The bore 115 bears on the outer side 90 of the window 20 beyond the marginal region 95. In the second upper segment 135, the lip 115 arrives on the coating 100. When the wiper blade 60 leaves its second inversion position 75 towards its first inverting position 65, because of the greater coefficient of friction between the lip 115 and the outer side 90 of the pane 20 will have a greater friction force exerted on the lip 115 only in the second upper segment 135. As a result, when the wiping direction of the wiper blade 60 in its second inverting position 75, the wiping lip 115 first switches to the opposite direction by its lower segment 130 before the lip 115 of the upper segment 135 of the lip 115 in turn tilts because of its lower coefficient of friction with the coating 100. This results in a reduction of the tilting noises of the system. 'windscreen 10 in the reversing positions which improves the comfort of traffic even for a wiper installation 35 operating quickly. Particularly advantageously, the segments 130, 135 are substantially identical in the second inversion position 75. According to the movement curve of the wiper blade 60, the marginal region 95 and the water-repellent coating of this region have different geometric shapes. For example, it can be envisaged that the marginal region 95 has a constant width (b) from the lateral edge 30 of the window 20. Alternatively, it can also be envisaged that the marginal region 95 or the water-repellent coating 100 is wider or narrower in the lower region 70 than in the upper region 140 of the window 20, on the side facing the upper edge 105 to thereby adapt the marginal region 95 to the situation of the second inversion position 75 on the window 20. Figure 5 is a schematic top view of an alternative embodiment of the coating 100 in the marginal region 95. The strip-like coating 100 comprises a first segment 145 and a second segment 150; the two segments 145, 150 are separated by a third segment 151. The third segment in the marginal region 95 does not have a coating 100 so that in this region, the window body 21 reaches the upper surface 90 of the The first segment 145 is separated from the second segment 150 by the third segment 151. In this embodiment, the segments 145, 150 of the coating 100 are parallel to each other and parallel to the lateral edge 30 of the glass body 21. It is also possible to consider that the segments 145, 150 are for example inclined so that the regions between the segments 145, 150 widen or shrink in the direction (y) or towards the upper edge 105 of the glass body 21. The segments 145 150 are furthermore made in the form of strips of constant width. Thus in the embodiment of the marginal region 95, the second inverting position 75 is at least partly in the marginal region 95 so that the sealing lip 115 rests on the segments 145, 150, 151 Thus, during the return movement from the second inverting position 75 to the first inverting position 65, there will be a tilting of the lip 115 in the third segment 151 when the lip 115 is applied directly against the side In addition, the lip 115 also rests against the water-repellent coating 100 in the segments 145, 150. During the return movement from the second inversion position 75 in the first position Inverting 65, the segments of the lip 115 which directly apply against the third segment 151 of the glass body 21 first rock before the segments of the lip 115 follow and tilt; these are the segments applied against the coating 100 of the first and the third segment 145, 150. This reduces the tilting noises. In the embodiment, there is further a fourth segment 152 directly adjacent to the side edge 30. The second inverting position 75 intersects all the segments 145, 150, 151, 152 so that the tilting of the different segments of the lip 115 is successively which reduces the tilting noise of the lip 115 in its second inversion position 75. This embodiment shows that the second inversion position 75 is such that the lip 115 cuts the three segments or the touch. It can also be envisaged that the second inversion position 75 is associated exclusively with the first segment 145. In a variant, it is also possible to envisage that the second inversion position 75 corresponds only to a portion of the segments 145, 150, 151, 152 described above.

The first and the second and the fourth segments 145, 150, 151, 152 thus function as channels through which the liquid 96 discharged from the wiping range 85 rises towards the upper edge 105 or descends towards the lower region 70 The third segment 151 thus serves as a braking segment in which the liquid 96 discharged from the wiping region 85 is braked in its movement towards the column A 35 to pass more easily towards the upper edge 105 or the lower region 65 of the glass 20.

Figure 6 is a schematic top view of an alternative embodiment of the coating 100 in the marginal region 95. The segments 145, 150, 151, 152 are inclined with respect to the side edge 30 and these segments are parallel to each other. The segments 145, 150, 151, 152 are geometrically identical. The orientation of the segments 145, 150, 151, 152 is chosen to extend from the high left side to the low right side of the marginal region 95. In a variant, another alignment can also be envisaged, so that these segments are for example perpendicular to the side edge 30 or are arranged from the top right down to the left in the marginal region 95. It should be noted that the segments 145, 150, 151, 152 may also have a different geometric shape. Thus it is envisaged that for example the second segment 150 will be shorter than the first segment 145 or longer or wider or narrower. This arrangement of the segments 145, 150, 152 also makes it possible to evacuate, in a targeted manner, the flow of water removed from the wiping area 85 so that this water passes over the first, the second or the fourth segment 145, 150 , 152. This arrangement of the segments 145, 150, 151, 152 if the second inverting position 75 is in the marginal region 95, reduces the tilting noises of the wiper blade 60 in its second inverting position 75 5 is a schematic top view of an alternative embodiment of the marginal region 95 of the pane 20. The marginal region has a first vertical segment 170, parallel to the side edge 30 of the window 20 and a second segment 175 inclined relative to the first segment 170 and the side edge 30; in the first and second segments 170, 175 there is a coating 100. Between the second segments 175 there are third segments 180 having no coating 100 so that the glass body 21 appears on the outside. In the embodiment, the width (bi) of the first segment 170 is identical to the width (b2) of the second segment 175. In FIG. 7, the second segments 175, that is, also corresponding to the third segments 180 , are parallel and go from the top left down to the right. But it can also be envisaged that the second and third segments 175, 180 are directed from the left downwards to the right upwards. If the second inverting position 75 is in the marginal region 95 of the window 20, the tipping noises of the lip 115 of the wiper blade 60 are reduced as described above also by the realization of the region. In this case, the lip 115 first tilts in the third segments 180 between the strips of the second segment 175 because of the strongest friction in the region 180 between the lip 115 and the glass body 21. The sealing lip 115 which arrives in the second segment 175 is tilted after tilting of the regions of the lip 115 applied against the third segment 180 which reduces the sound of the tilting of the lip 115 in its second inverted position.

Figure 8 is a schematic top view of another alternative embodiment of the marginal region 95. The marginal region includes a first meander-shaped segment 185 with a liner 100. The residual region of the marginal region 95 forms the second segment 190 in which there is no coating on the window body 21 so that in the second segment 190, the window body appears at the outer side 90. In this embodiment also can be evacuated water by the first segment 185 and the channel developed by the meander shape, continuously upwardly towards the upper edge 105. In addition, as described, if the second inverting position 75 is in the marginal region 95, the reduction of tilt noise in the second reversing position when changing the direction of rotation of the wiper arm.5 10 14 15 NOMENCLATURE OF THE MAIN ELEMENTS 20 21 Wiper system Automobil vehicle e Glass / Windscreen Glass pane 25, 26 Column A 30 Side edge of glass pane 35 Windscreen wiper system 10 40 Wiper drive 45 Wiper shaft 50 Wiper arm 55 Fixing element 60 Wiper blade 15 65 First reversing position 70 Lower window area 75 Second reversing position 85 Wiping area 90 Outside side 20 95 Marginal region 96 Wiped liquid 100 Coating 105 Top edge of glass 110 Baffle 25 115 Wiper lip 125 Elastic rail of the wiper blade 130 Swirl 145, 150, 151, 152 Segments 170, 175, 180 Segments 30

Claims (10)

1) Motor vehicle window (15) comprising a glass body (21) preferably of composite glass whose outer side (90) comprises a coating (100) repelling the liquid (96), and a marginal region (95) on the outer side (90) which extends from the side edge (30) inwards to the outer side (90) of the window body (21), characterized in that the coating (100) is exclusively provided in the marginal region (95) and this marginal region (95) extends inwardly from the side edge (30) mainly from 1 to 10 cm. 2) Glass according to claim 1, characterized in that the coating (100) completely covers the marginal region (95). 3) A window according to claim 1, characterized in that the marginal region (95) has at least one first segment (145, 150, 152, 185) and at least one second segment (151, 190), the first segment ( 145, 150, 152, 185) being provided with the coating (100), and the second segment (151, 190) of the glass body (21) not being covered by the coating. 4) A window according to claim 3, characterized in that the first segment (185) has a meander shape. 5 °) A window according to claim 3 or 4, characterized in that the first segment (145) is parallel to the side edge (30) of the pane (20). Glass according to claim 3, characterized in that the marginal region (95) comprises at least one third segment (150, 152), the coating (100) being in the third segment (145, 150, 152), the first segment (145) being separated from the third segment (150, 152), and the second segment (151) is between the first and third segments (145, 150, 152). 7 °) A window according to claim 6, characterized in that the first segment (170) is parallel to the lateral edge (30) of the window body (21) and the third segment (175) is inclined relative to the first segment (170). ). 8 °) A window according to claim 6, characterized in that the first segment (145) and the third segment (150) are parallel to each other and inclined relative to the side edge (30) of the glass body (21). Motor vehicle wiper system (10) (15) comprising a wiper system (35) and a window (20) according to one of claims 1 to 8, the installation of wiper blade (35) having a wiper arm (50) carrying a wiper blade (60) and a wiper drive (40) coupled to the wiper arm (50) and the wiper blade (60) is movable between a first inverting position (65) in the lower region of the pane (20) and a second inverting position (75) in the lateral region (80). near the column A (25) of the vehicle (15), the marginal region (95) lying at least partly between the second inverting position (75) and the side edge (30) of the pane (20). The wiper system (10) of claim 9, characterized in thatthe second inverting position (75) is such that the wiper blade (60) is applied to a coating (100). ) in the first segment (130) on the body (21) of the window (20) and in the second segment (135) on the coating (100).