WO2009127585A1 - Device for spraying washing liquid onto a car window - Google Patents

Device for spraying washing liquid onto a car window Download PDF

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Publication number
WO2009127585A1
WO2009127585A1 PCT/EP2009/054265 EP2009054265W WO2009127585A1 WO 2009127585 A1 WO2009127585 A1 WO 2009127585A1 EP 2009054265 W EP2009054265 W EP 2009054265W WO 2009127585 A1 WO2009127585 A1 WO 2009127585A1
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WO
WIPO (PCT)
Prior art keywords
ramp
projection
openings
opening
directions
Prior art date
Application number
PCT/EP2009/054265
Other languages
French (fr)
Inventor
Jean-Michel Jarasson
Original Assignee
Valeo Systemes D'essuyage
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Publication date
Application filed by Valeo Systemes D'essuyage filed Critical Valeo Systemes D'essuyage
Publication of WO2009127585A1 publication Critical patent/WO2009127585A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B60S1/522—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms
    • B60S1/524—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms arranged in wiper blades

Definitions

  • the present invention relates to a device for spraying a washing liquid on a vehicle window.
  • the invention finds a particularly advantageous application in the field of wiper systems of motor vehicle windows.
  • This "flat mop” technology consists of a structure built around a central element consisting of a longitudinal support of semi-rigid plastic material on which various other functional elements are reported.
  • a first functional element is a metal rod housed in a longitudinal cavity of the support.
  • This metal rod has the dual function of ensuring, on the one hand, the entire wiper blade rigidity required for good mechanical strength, and the distribution of the pressure exerted by the drive arm on the This is why it is often referred to as the “vertebra” ("spline" in Anglo-Saxon).
  • a second functional element is an elastomeric wiper blade attached to the longitudinal support by means of a claw extruded with the support.
  • a third functional element is an accessory for improving the quality of wiping.
  • this accessory is made of elastomer and is assembled to the longitudinal support by various means, in particular by clipping.
  • a first type of accessory is, for example, a device for spraying a suitable washing liquid which, by virtue of its combined action with the sweeping movement of the wiper blade, eliminates certain solid particles that can be removed. attach to the windows, like the projections of mud or insect residue crushed against the windshield.
  • a projection device comprises at least one substantially cylindrical projection ramp disposed laterally along the longitudinal support.
  • the projection device has only one ramp, while in a two-ramp version, the device comprises two parallel ramps located on either side of the longitudinal support.
  • the ramps are provided with openings for the projection of the washing liquid on the windshield.
  • Another type of accessory may be an aerodynamic deflector which uses the relative wind of the vehicle to increase the contact force of the wiper blade against the window to be wiped.
  • the openings of which are provided with the ramps of the liquid projection device are generally simple circular holes capable of producing a substantially straight liquid jet in a direction perpendicular to the ramp, the jet forming on the vehicle glass a one-off impact. .
  • an object of the invention is to provide a projection device that would increase the wettability of the windows, including windshield, by a better distribution of the washing liquid impact the windows.
  • a device for spraying a washing liquid on a vehicle window comprising at least one less a ramp provided with at least one opening for projecting said liquid on said window in a given direction, remarkable in that at least one opening has a shape adapted to project the washing liquid in a direction inclined with respect to a plane perpendicular to said ramp.
  • this arrangement makes it possible to favorably orient the direction of projection, especially down the wiper, so as to take advantage of the recovery effect induced by the movement of the broom itself and the aerodynamic movement related to the movement of the vehicle.
  • said device comprising two parallel projection ramps, the directions of projection of the openings of a ramp and the directions of projection of the openings of the other ramp are parallel.
  • the directions of projection of the openings of a ramp and the projection directions of the openings of the other ramp are antiparallel.
  • the invention provides that at least one opening has a shape capable of projecting the washing liquid in the form of a beam s'. extending around the projection direction, perpendicular to said ramp.
  • the washing liquid is projected into a narrow beam having an impact extended in depth over a much greater distance than that of an impact. punctual obtained with a substantially straight stream.
  • the amount of liquid spray is better distributed on the glass.
  • the wettability of the glass is thus increased, which allows to accelerate the defrosting or cleaning, in accordance with the purpose of the invention.
  • said opening has an oblong shape perpendicular to said ramp.
  • said opening has an oblong shape flared perpendicularly to said ramp.
  • flared shape reference is made here to the fact that the walls of the opening diverge in the thickness of the ramp, while for a simple oblong shape the walls remain parallel over the entire thickness of the ramp.
  • the invention proposes that said opening has a shape also capable of spraying the liquid of washing in the form of a beam extending perpendicular to the direction of projection.
  • said opening has a conical shape. More particularly, said opening has a conical shape of revolution.
  • said opening has a tetrahedral shape.
  • the invention also relates to a wiper blade remarkable in that it comprises a projection device according to the invention.
  • FIG. 1a is a diagram in top view of a first embodiment of a two-ramp projection device with projection directions. inclined.
  • FIG. 1b is a diagram in plan view of a second embodiment of a two-ramp projection device with inclined projection directions.
  • FIG. 1c is a diagram in plan view of a third embodiment of a two-ramp projection device with inclined projection directions.
  • Figure 2a is a front view of a first embodiment of an opening of a projection device according to the invention.
  • Figure 2b is a perspective view of a wiper having an opening according to Figure 2a.
  • Figure 3a is a front view of a second embodiment of an opening of a projection device according to the invention.
  • Figure 3b is a perspective view of a wiper having an opening according to Figure 3a.
  • Figure 4a is a front view of a third embodiment of an opening of a projection device according to the invention.
  • Figure 4b is a perspective view of a wiper having an opening according to Figure 4a.
  • Figure 5a is a front view of a fourth embodiment of an opening of a projection device according to the invention.
  • Figure 5b is a perspective view of a wiper having an opening according to Figure 5a.
  • Figures 1a to 1c show devices for spraying washing liquid on a vehicle window, comprising two ramps 42a,
  • the openings along the ramps 42a, 42b are respectively designated by the general reference 421a, 421b.
  • the directions d a , d b of liquid projection are inclined relative to a plane perpendicular P to the direction D a , D b ramps 42a, 42b.
  • these embodiments contribute to an improvement of the wettability of the glass to be cleaned due in particular to the complementarity effect obtained between the projection impacts produced by the ramps during the movement. back and forth from the wiper blade.
  • the rail 42a comprises a first group G 1 a1 42Ia openings having a1 of directions of projection parallel to each other, a second group G a2 openings 421 2 having parallel projection a2 of directions antiparallel to each other and to those of the group G a1, G and a central group of apertures 421 a3 3 having projection a3 of directions perpendicular to the direction D of the ramp 42a.
  • the ramp 42b has a first group G b1 of openings 42I b 1 having b1 projection directions parallel to each other and antiparallel to those of group G a1 , a second group G b2 openings 421 b 2 having directions d b2 projection parallel to each other and antiparallel to those of group G b1 , and a central group G b3 openings 421 b 3 having b3 projection directions perpendicular to the direction D b of the ramp 42b.
  • Figure 1c is deduced from that of Figure 1b by a staggered arrangement of the openings of the ramp 42a and openings of the ramp 42b.
  • a wiper blade for vehicle windows comprising a longitudinal support 10 extruded semi-rigid plastic material.
  • This support 10 comprises a housing 11 intended to receive a metal stiffening rod, or "vertebra", not shown, extending substantially over the entire length of the wiper blade.
  • the support 10 also comprises a longitudinal claw 12 in which is introduced an elastomeric wiper blade, also not shown in Figure 2b.
  • the accessory 40 comprises a fluid projection device of the type of those shown in Figures 1a to 1c.
  • the accessory 40 is generally made of a single material, here an extruded elastomer.
  • FIG. 2b only a ramp 42a has been shown, thus illustrating a single-ramp version of the projection device, or a two-ramp version in which a second ramp 42b would be symmetrically disposed at the first ramp 42a relative to 10.
  • the devices of FIGS. 1a to 1c give various examples of such bi-ramp versions.
  • the openings 421a of the ramp 42a have an oblong shape parallel to the direction D of the ramp.
  • This particular geometry offers the advantage, highlighted in FIG. 2b, of projecting the washing liquid in the form of bundles F a extending around the mean direction d a of projection perpendicular to this direction, c that is parallel to the direction D a of the ramp 42a.
  • the impact of the liquid sprayed on the window is thus increased in the direction of the width of a distance I relative to the point impact obtained with a straight jet produced by a single hole.
  • the distribution of the liquid on the glass is thus improved for better wettability and a more efficient and faster cleaning in particularly difficult conditions related for example to the presence on the windshield of frost or stubborn soils, such as residues d crushed insects.
  • FIG. 3a shows an embodiment variant in which the opening 421 'has an oblong shape flared parallel to the ramp 42a.
  • the beam F 'produced by such flared opening has, as shown in Figure 3b, a diverging shape for a dispersion of the washing liquid over a width I' greater than in the case of the opening 421a also oblong but of constant section.
  • FIG. 4a illustrates another embodiment in which the openings 421a, 421b of the ramps 42a, 42b have an oblong shape flared in a direction ⁇ perpendicular to the direction D a , D b of the ramps.
  • This particular geometry offers the advantage illustrated in FIG. 4b of projecting the washing liquid in the form of narrow bundles F a , F b extending around the mean directions d a , d b of projection, perpendicular to the directions.
  • D a , D b ramps 42a, 42b.
  • the impact of the liquid sprayed on the window is thus increased in the direction of the depth of a distance L with respect to the point impact obtained with a straight jet produced by a single hole.
  • the distribution of the liquid on the glass is thus further improved in the direction of greater wettability of the glass and cleaning more effective and faster, especially in particularly difficult cleaning conditions.
  • Figure 5a shows an embodiment wherein the openings 421 'a, 421' b have a conical shape, for example conical revolution.
  • a conical shape for example conical revolution.
  • other forms would achieve the same result, such as a tetrahedral form for example.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)

Abstract

The invention relates to a device for spraying washing liquid on a car window, including at least one line (42a, 42b) having at least one opening (421a, 421b) for spraying said liquid onto said window in a given direction (da, db). According to the invention, at least one opening (421a, 421b) has a form capable of spraying the washing liquid in an inclined direction (da, db) relative to a plane perpendicular (P) to said line. The invention is used in motor vehicle window wiping systems.

Description

Description Description
DISPOSITIF DE PROJECTION DE LIQUIDE DE LAVAGE SUR UNE VITRE DEDEVICE FOR SPRAYING WASHING LIQUID ON A GLASS OF
VEHICULEVEHICLE
[0001] La présente invention concerne un dispositif de projection d'un liquide de lavage sur une vitre de véhicule.The present invention relates to a device for spraying a washing liquid on a vehicle window.
[0002] L'invention trouve une application particulièrement avantageuse dans le domaine des systèmes d'essuyage des vitres de véhicules automobiles.The invention finds a particularly advantageous application in the field of wiper systems of motor vehicle windows.
[0003] II existe aujourd'hui une technologie concernant les balais d'essuyage pour vitres de véhicule connue sous le nom de « balai souple » ou « balai plat » (« Fiat Blade » en anglo-saxon) et dont un exemple de réalisation est décrit dans la demande internationale n° WO2007/000346.There is now a technology for wiper blades for vehicle windows known as "soft blade" or "flat blade" ("Fiat Blade" in English) and an example of embodiment is described in International Application No. WO2007 / 000346.
[0004] Cette technologie « balai plat » consiste en une structure construite autour d'un élément central constitué par un support longitudinal en matériau plastique semi-rigide sur lequel sont rapportés divers autres éléments fonctionnels.This "flat mop" technology consists of a structure built around a central element consisting of a longitudinal support of semi-rigid plastic material on which various other functional elements are reported.
[0005] Un premier élément fonctionnel est une tige métallique logée dans une cavité longitudinale du support. Cette tige métallique a pour double fonction d'assurer, d'une part, à l'ensemble du balai d'essuyage la rigidité requise pour une bonne tenue mécanique, ainsi que la répartition de la pression exercée par le bras d'entraînement sur le pare-brise C'est pourquoi on la désigne souvent sous le terme de « vertèbre » (« spline » en anglo-saxon).[0005] A first functional element is a metal rod housed in a longitudinal cavity of the support. This metal rod has the dual function of ensuring, on the one hand, the entire wiper blade rigidity required for good mechanical strength, and the distribution of the pressure exerted by the drive arm on the This is why it is often referred to as the "vertebra" ("spline" in Anglo-Saxon).
[0006] Un deuxième élément fonctionnel est une lame d'essuyage en élastomère fixée au support longitudinal par l'intermédiaire d'une griffe extrudée avec le support.A second functional element is an elastomeric wiper blade attached to the longitudinal support by means of a claw extruded with the support.
[0007] Enfin, un troisième élément fonctionnel est un accessoire destiné à améliorer la qualité de l'essuyage. En général, cet accessoire est en élastomère et est assemblé au support longitudinal par divers moyens, notamment par clippage.Finally, a third functional element is an accessory for improving the quality of wiping. In general, this accessory is made of elastomer and is assembled to the longitudinal support by various means, in particular by clipping.
[0008] Un premier type d'accessoire est, par exemple, un dispositif de projection d'un liquide de lavage approprié qui permet, par action conjuguée avec le mouvement de balayage de la lame d'essuyage, d'éliminer certaines particules solides pouvant se fixer sur les vitres, comme les projections de boue ou les résidus d'insectes écrasés contre le pare-brise. De manière pratique, un tel dispositif de projection comporte au moins une rampe de projection de forme sensiblement cylindrique disposée latéralement le long du support longitudinal. Dans une version mono-rampe, le dispositif de projection ne comporte qu'une seule rampe, tandis que, dans une version bi-rampes, le dispositif comporte deux rampes parallèles situées de part et d'autre du support longitudinal. De plus, les rampes sont munies d'ouvertures permettant la projection du liquide de lavage sur le pare-brise.A first type of accessory is, for example, a device for spraying a suitable washing liquid which, by virtue of its combined action with the sweeping movement of the wiper blade, eliminates certain solid particles that can be removed. attach to the windows, like the projections of mud or insect residue crushed against the windshield. In practice, such a projection device comprises at least one substantially cylindrical projection ramp disposed laterally along the longitudinal support. In a single-ramp version, the projection device has only one ramp, while in a two-ramp version, the device comprises two parallel ramps located on either side of the longitudinal support. In addition, the ramps are provided with openings for the projection of the washing liquid on the windshield.
[0009] Un autre type d'accessoire peut être un déflecteur aérodynamique qui utilise le vent relatif du véhicule pour augmenter la force de contact de la lame d'essuyage contre la vitre à essuyer.Another type of accessory may be an aerodynamic deflector which uses the relative wind of the vehicle to increase the contact force of the wiper blade against the window to be wiped.
[0010] La demande internationale précitée illustre un balai d'essuyage relevant de la technologie « balai plat » dont l'accessoire combine en un seul élément un dispositif de projection de liquide avec un déflecteur aérodynamique.The aforementioned international application illustrates a wiper blade of technology "flat broom" whose accessory combines in a single element a liquid projection device with an aerodynamic baffle.
[0011] Les ouvertures dont sont munies les rampes du dispositif de projection de liquide sont généralement de simples trous circulaires capables de produire un jet de liquide sensiblement rectiligne dans une direction perpendiculaire à la rampe, le jet formant sur la vitre du véhicule un impact ponctuel.The openings of which are provided with the ramps of the liquid projection device are generally simple circular holes capable of producing a substantially straight liquid jet in a direction perpendicular to the ramp, the jet forming on the vehicle glass a one-off impact. .
[0012] On comprend cependant que cette configuration de jet ainsi projeté peut dans certains cas se révéler relativement peu efficace, notamment lorsqu'il s'agit de dégivrer ou nettoyer un pare-brise particulièrement sale. Dans ces circonstances en effet, il est nécessaire de pouvoir disposer de quantités plus importantes de liquide si l'on veut éviter que les opérations de dégivrage ou de nettoyage ne prennent un temps trop long qui serait incompatible avec les exigences de la sécurité automobile.However, it is understood that this jet configuration thus projected may in some cases be relatively inefficient, especially when it comes to defrost or clean a particularly dirty windshield. In these circumstances, in fact, it is necessary to be able to have larger amounts of liquid if we want to prevent the deicing or cleaning operations from taking too long a time that would be incompatible with the requirements of automobile safety.
[0013] Aussi, un but de l'invention est de proposer un dispositif de projection qui permettrait d'augmenter la mouillabilité des vitres, pare-brise notamment, par une meilleure répartition du liquide de lavage à l'impact sur les vitres.Also, an object of the invention is to provide a projection device that would increase the wettability of the windows, including windshield, by a better distribution of the washing liquid impact the windows.
[0014] Ce but est atteint, conformément à l'invention, grâce à un dispositif de projection d'un liquide de lavage sur une vitre de véhicule, comprenant au moins une rampe munie d'au moins une ouverture destinée à projeter ledit liquide sur ladite vitre dans une direction donnée, remarquable en ce qu'au moins une ouverture présente une forme apte à projeter le liquide de lavage dans une direction inclinée par rapport à un plan perpendiculaire à ladite rampe.This object is achieved, in accordance with the invention, by means of a device for spraying a washing liquid on a vehicle window, comprising at least one less a ramp provided with at least one opening for projecting said liquid on said window in a given direction, remarkable in that at least one opening has a shape adapted to project the washing liquid in a direction inclined with respect to a plane perpendicular to said ramp.
[0015] Ainsi, dans le cas d'un dispositif mono-rampe par exemple, on comprend que cette disposition permet d'orienter favorablement la direction de projection, notamment vers le bas du balai d'essuyage, de manière à profiter de l'effet de récupération induit par le mouvement du balai lui-même et du mouvement aérodynamique lié au déplacement du véhicule.Thus, in the case of a single-ramp device for example, it is understood that this arrangement makes it possible to favorably orient the direction of projection, especially down the wiper, so as to take advantage of the recovery effect induced by the movement of the broom itself and the aerodynamic movement related to the movement of the vehicle.
[0016] Dans le cas d'un dispositif bi-rampes, il est prévu par l'invention que, ledit dispositif comprenant deux rampes de projection parallèles, les directions de projection des ouvertures d'une rampe et les directions de projection des ouvertures de l'autre rampe sont parallèles. Dans une autre forme de réalisation, les directions de projection des ouvertures d'une rampe et les directions de projection des ouvertures de l'autre rampe sont antiparallèles.In the case of a bi-ramp device, it is provided by the invention that, said device comprising two parallel projection ramps, the directions of projection of the openings of a ramp and the directions of projection of the openings of the other ramp are parallel. In another embodiment, the directions of projection of the openings of a ramp and the projection directions of the openings of the other ramp are antiparallel.
[0017] On obtient ainsi un double avantage, à savoir celui de l'effet de récupération mentionné plus haut, auquel s'ajoute celui de l'effet de complémentarité entre les impacts de projection produits par les rampes au cours du mouvement d'aller-retour du balai d'essuyage.There is thus obtained a double advantage, namely that of the recovery effect mentioned above, to which is added that of the complementarity effect between the projection impacts produced by the ramps during the movement to go. -back of the wiper blade.
[0018] II faut également noter que l'effet de complémentarité entre impacts peut également être obtenu du fait que, ledit système comprenant deux rampes de projection parallèles, les ouvertures ménagées le long desdites rampes sont disposées en quinconce.It should also be noted that the effect of complementarity between impacts can also be obtained because, said system comprising two parallel projection ramps, the openings formed along said ramps are arranged in staggered rows.
[0019] Afin d'améliorer la répartition du liquide de lavage à l'impact sur les vitres, l'invention prévoit qu'au moins une ouverture présente une forme apte à projeter le liquide de lavage sous la forme d'un faisceau s'étendant autour de la direction de projection, perpendiculairement à ladite rampe.In order to improve the distribution of the washing liquid on impact to the windows, the invention provides that at least one opening has a shape capable of projecting the washing liquid in the form of a beam s'. extending around the projection direction, perpendicular to said ramp.
[0020] De cette manière, et comme on le verra en détail plus loin, le liquide de lavage est projeté en un faisceau étroit présentant un impact étendu en profondeur sur une distance beaucoup plus grande que celle d'un impact ponctuel obtenu avec un jet sensiblement rectiligne. Il en résulte que la quantité de liquide projeté est mieux répartie sur la vitre. La mouillabilité de la vitre se trouve donc augmentée, ce qui permet d'en accélérer le dégivrage ou le nettoyage, conformément au but visé par l'invention.In this way, and as will be seen in detail below, the washing liquid is projected into a narrow beam having an impact extended in depth over a much greater distance than that of an impact. punctual obtained with a substantially straight stream. As a result, the amount of liquid spray is better distributed on the glass. The wettability of the glass is thus increased, which allows to accelerate the defrosting or cleaning, in accordance with the purpose of the invention.
[0021] Selon un mode de réalisation, ladite ouverture présente une forme oblongue perpendiculairement à ladite rampe. En particulier, ladite ouverture présente une forme oblongue évasée perpendiculairement à ladite rampe. Par forme évasée, on fait référence ici au fait que les parois de l'ouverture divergent dans l'épaisseur de la rampe, alors que pour une forme oblongue simple les parois restent parallèles sur toute l'épaisseur de la rampe.According to one embodiment, said opening has an oblong shape perpendicular to said ramp. In particular, said opening has an oblong shape flared perpendicularly to said ramp. By flared shape, reference is made here to the fact that the walls of the opening diverge in the thickness of the ramp, while for a simple oblong shape the walls remain parallel over the entire thickness of the ramp.
[0022] Dans le but d'augmenter encore la surface de l'impact de projection, et donc d'obtenir une meilleure mouillabilité de la vitre à nettoyer, l'invention propose que ladite ouverture présente une forme également apte à projeter le liquide de lavage sous la forme d'un faisceau s'étendant perpendiculairement à la direction de projection.In order to further increase the surface of the impact projection, and thus to obtain a better wettability of the glass to be cleaned, the invention proposes that said opening has a shape also capable of spraying the liquid of washing in the form of a beam extending perpendicular to the direction of projection.
[0023] On réalise alors un faisceau non seulement étendu en profondeur mais également en largeur pour une répartition optimale du liquide de lavage sur la vitre.Then we realize a beam not only extended in depth but also in width for optimal distribution of the washing liquid on the glass.
[0024] Dans ce contexte, un certain nombre de formes d'ouverture peut être envisagé.In this context, a number of opening forms can be envisaged.
[0025] Selon une première variante, ladite ouverture présente une forme conique. Plus particulièrement, ladite ouverture présente une forme conique de révolution.In a first variant, said opening has a conical shape. More particularly, said opening has a conical shape of revolution.
[0026] Selon une deuxième variante, ladite ouverture présente une forme tétraédrique.In a second variant, said opening has a tetrahedral shape.
[0027] Enfin, l'invention concerne également un balai d'essuyage remarquable en ce qu'il comporte un dispositif de projection selon l'invention.Finally, the invention also relates to a wiper blade remarkable in that it comprises a projection device according to the invention.
[0028] La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The following description with reference to the accompanying drawings, given by way of non-limiting examples, will explain in what the invention is and how it can be achieved.
[0029] La figure 1a est un schéma en vue de dessus d'un premier mode de réalisation d'un dispositif de projection bi-rampes à directions de projection inclinées. [0030] La figure 1 b est un schéma en vue de dessus d'un deuxième mode de réalisation d'un dispositif de projection bi-rampes à directions de projection inclinées. [0031] La figure 1c est un schéma en vue de dessus d'un troisième mode de réalisation d'un dispositif de projection bi-rampes à directions de projection inclinées. [0032] La figure 2a est une vue de face d'un premier mode de réalisation d'une ouverture d'un dispositif de projection conforme à l'invention. [0033] La figure 2b est une vue en perspective d'un balai d'essuyage comportant une ouverture conforme à la figure 2a. [0034] La figure 3a est une vue de face d'un deuxième mode de réalisation d'une ouverture d'un dispositif de projection conforme à l'invention. [0035] La figure 3b est une vue en perspective d'un balai d'essuyage comportant une ouverture conforme à la figure 3a. [0036] La figure 4a est une vue de face d'un troisième mode de réalisation d'une ouverture d'un dispositif de projection conforme à l'invention. [0037] La figure 4b est une vue en perspective d'un balai d'essuyage comportant une ouverture conforme à la figure 4a. [0038] La figure 5a est une vue de face d'un quatrième mode de réalisation d'une ouverture d'un dispositif de projection conforme à l'invention. [0039] La figure 5b est une vue en perspective d'un balai d'essuyage comportant une ouverture conforme à la figure 5a. [0040] Sur les figures 1a à 1c sont représentés des dispositifs de projection de liquide de lavage sur une vitre de véhicule, comprenant deux rampes 42a,FIG. 1a is a diagram in top view of a first embodiment of a two-ramp projection device with projection directions. inclined. FIG. 1b is a diagram in plan view of a second embodiment of a two-ramp projection device with inclined projection directions. FIG. 1c is a diagram in plan view of a third embodiment of a two-ramp projection device with inclined projection directions. Figure 2a is a front view of a first embodiment of an opening of a projection device according to the invention. Figure 2b is a perspective view of a wiper having an opening according to Figure 2a. [0034] Figure 3a is a front view of a second embodiment of an opening of a projection device according to the invention. Figure 3b is a perspective view of a wiper having an opening according to Figure 3a. Figure 4a is a front view of a third embodiment of an opening of a projection device according to the invention. Figure 4b is a perspective view of a wiper having an opening according to Figure 4a. Figure 5a is a front view of a fourth embodiment of an opening of a projection device according to the invention. Figure 5b is a perspective view of a wiper having an opening according to Figure 5a. Figures 1a to 1c show devices for spraying washing liquid on a vehicle window, comprising two ramps 42a,
42b disposées de chaque côté du support longitudinal 10 d'un balai d'essuyage de technologie « balai souple » ou « balai plat » (« Fiat42b disposed on each side of the longitudinal support 10 of a wiper blade technology "soft broom" or "flat broom" ("Fiat
Blade »). [0041] Les ouvertures ménagées le long des rampes 42a, 42b sont désignées respectivement sous la référence générale 421a, 421 b. De même, on désignera par da, db les directions de projection de liquide associées respectivement aux ouvertures 421a, 421 b. [0042] Conformément aux modes de réalisation montrés aux figures 1a à 1c, les directions da, db de projection de liquide sont inclinées par rapport à un plan perpendiculaire P à la direction Da, Db des rampes 42a, 42b.Blade "). The openings along the ramps 42a, 42b are respectively designated by the general reference 421a, 421b. Similarly, designated by d a, d b of the liquid projection directions respectively associated with the apertures 421a, 421 b. According to the embodiments shown in FIGS. 1a to 1c, the directions d a , d b of liquid projection are inclined relative to a plane perpendicular P to the direction D a , D b ramps 42a, 42b.
[0043] Comme cela a été expliqué plus haut, ces modes de réalisation contribuent à une amélioration de la mouillabilité de la vitre à nettoyer du fait notamment de l'effet de complémentarité obtenu entre les impacts de projection produits par les rampes au cours du mouvement d'aller-retour du balai d'essuyage.As explained above, these embodiments contribute to an improvement of the wettability of the glass to be cleaned due in particular to the complementarity effect obtained between the projection impacts produced by the ramps during the movement. back and forth from the wiper blade.
[0044] Dans l'exemple de réalisation de la figure 1a, toutes les directions da, db de projection des ouvertures 421a, 421 b d'une même rampe 42a, 42b sont parallèles et confondues deux à deux d'une rampe à l'autre.[0044] In the embodiment of Figure 1a, all the directions d a, d b of projection 421a of the openings 421 b in the same ramp 42a, 42b are parallel and combined in pairs from one ramp to the other.
[0045] Dans l'exemple de réalisation de la figure 1 b, la rampe 42a comporte un premier groupe Ga1 d'ouvertures 42Ia1 présentant des directions da1 de projection parallèles entre elles, un deuxième groupe Ga2 d'ouvertures 421 a2 présentant des directions da2 de projection parallèles entre elles et antiparallèles à celles du groupe Ga1, et un groupe central Ga3 d'ouvertures 421 a3 présentant des directions da3 de projection perpendiculaires à la direction Da de la rampe 42a.[0045] In the embodiment of Figure 1b, the rail 42a comprises a first group G 1 a1 42Ia openings having a1 of directions of projection parallel to each other, a second group G a2 openings 421 2 having parallel projection a2 of directions antiparallel to each other and to those of the group G a1, G and a central group of apertures 421 a3 3 having projection a3 of directions perpendicular to the direction D of the ramp 42a.
[0046] De même, la rampe 42b comporte un premier groupe Gb1 d'ouvertures 42I b1 présentant des directions db1 de projection parallèles entre elles et antiparallèles à celles du groupe Ga1, un deuxième groupe Gb2 d'ouvertures 421 b2 présentant des directions db2 de projection parallèles entre elles et antiparallèles à celles du groupe Gb1, et un groupe central G b3 d'ouvertures 421 b3 présentant des directions db3 de projection perpendiculaires à la direction Db de la rampe 42b.Similarly, the ramp 42b has a first group G b1 of openings 42I b 1 having b1 projection directions parallel to each other and antiparallel to those of group G a1 , a second group G b2 openings 421 b 2 having directions d b2 projection parallel to each other and antiparallel to those of group G b1 , and a central group G b3 openings 421 b 3 having b3 projection directions perpendicular to the direction D b of the ramp 42b.
[0047] L'exemple de réalisation de la figure 1c se déduit de celui de la figure 1b par une disposition en quinconce des ouvertures de la rampe 42a et des ouvertures de la rampe 42b.The embodiment of Figure 1c is deduced from that of Figure 1b by a staggered arrangement of the openings of the ramp 42a and openings of the ramp 42b.
[0048] Sur la figure 2b est représenté plus en détail un balai d'essuyage pour vitres de véhicules comprenant un support longitudinal 10 en matériau plastique semi-rigide extrudé. Ce support 10 comporte un logement 11 destiné à recevoir une tige métallique de rigidification, ou « vertèbre », non représentée, s'étendant sensiblement sur toute la longueur du balai d'essuyage. Le support 10 comporte également une griffe longitudinale 12 dans laquelle est introduite une lame d'essuyage en élastomère, également non représentée sur la figure 2b.In Figure 2b is shown in more detail a wiper blade for vehicle windows comprising a longitudinal support 10 extruded semi-rigid plastic material. This support 10 comprises a housing 11 intended to receive a metal stiffening rod, or "vertebra", not shown, extending substantially over the entire length of the wiper blade. The support 10 also comprises a longitudinal claw 12 in which is introduced an elastomeric wiper blade, also not shown in Figure 2b.
[0049] Sur le support longitudinal 10 est assemblé et fixé un accessoire 40 réalisé par extrusion indépendamment du support 10. Dans les divers exemples de réalisation illustrés sur les figures suivantes, l'accessoire 40 comprend un dispositif de projection de fluide du type de ceux montrés aux figures 1a à 1c. L'accessoire 40 est en général constitué d'un seul matériau, ici un élastomère extrudé.On the longitudinal support 10 is assembled and fixed an accessory 40 made by extrusion independently of the support 10. In the various embodiments illustrated in the following figures, the accessory 40 comprises a fluid projection device of the type of those shown in Figures 1a to 1c. The accessory 40 is generally made of a single material, here an extruded elastomer.
[0050] Sur la figure 2b, seule une rampe 42a a été représentée, illustrant ainsi une version mono-rampe du dispositif de projection, ou une version bi-rampes dans laquelle une deuxième rampe 42b serait disposée symétriquement à la première rampe 42a par rapport au support longitudinal 10. Les dispositifs des figures 1a à 1c donnent divers exemples de telles versions bi-rampes.In FIG. 2b, only a ramp 42a has been shown, thus illustrating a single-ramp version of the projection device, or a two-ramp version in which a second ramp 42b would be symmetrically disposed at the first ramp 42a relative to 10. The devices of FIGS. 1a to 1c give various examples of such bi-ramp versions.
[0051] Par ailleurs, on peut observer sur la figure 2b la présence sur l'accessoire 40 d'un déflecteur aérodynamique 41 destiné à améliorer le contact de la lame d'essuyage contre la vitre du véhicule. Il faut cependant souligner que ce déflecteur aérodynamique 41 n'est pas essentiel pour l'invention.Furthermore, it can be seen in Figure 2b the presence on the accessory 40 of an aerodynamic deflector 41 for improving the contact of the wiper blade against the vehicle window. It must however be emphasized that this aerodynamic deflector 41 is not essential for the invention.
[0052] Comme le montre la figure 2a, les ouvertures 421a de la rampe 42a présentent une forme oblongue parallèle à la direction Da de la rampe.[0052] As shown in Figure 2a, the openings 421a of the ramp 42a have an oblong shape parallel to the direction D of the ramp.
[0053] Cette géométrie particulière offre l'avantage, mis en évidence sur la figure 2b, de projeter le liquide de lavage sous la forme de faisceaux Fa s'étendant autour de la direction moyenne da de projection perpendiculairement à cette direction, c'est-à-dire parallèlement à la direction Da de la rampe 42a.This particular geometry offers the advantage, highlighted in FIG. 2b, of projecting the washing liquid in the form of bundles F a extending around the mean direction d a of projection perpendicular to this direction, c that is parallel to the direction D a of the ramp 42a.
[0054] L'impact du liquide projeté sur la vitre est donc augmenté dans le sens de la largeur d'une distance I par rapport à l'impact ponctuel obtenu avec un jet rectiligne produit par un simple trou. La répartition du liquide sur la vitre se trouve ainsi améliorée pour une meilleure mouillabilité et un nettoyage plus efficace et plus rapide dans des conditions particulièrement difficiles liées par exemple à la présence sur le pare-brise de givre ou de salissures tenaces, comme des résidus d'insectes écrasés.The impact of the liquid sprayed on the window is thus increased in the direction of the width of a distance I relative to the point impact obtained with a straight jet produced by a single hole. The distribution of the liquid on the glass is thus improved for better wettability and a more efficient and faster cleaning in particularly difficult conditions related for example to the presence on the windshield of frost or stubborn soils, such as residues d crushed insects.
[0055] La figure 3a montre une variante de réalisation dans laquelle l'ouverture 421 'a présente une forme oblongue évasée parallèlement à la rampe 42a.[0055] FIG. 3a shows an embodiment variant in which the opening 421 'has an oblong shape flared parallel to the ramp 42a.
[0056] Le faisceau F'a produit par une telle ouverture évasée a, comme l'indique la figure 3b, une forme divergente permettant une dispersion du liquide de lavage sur une largeur I' plus grande que dans le cas de l'ouverture 421a également oblongue mais de section constante.[0056] The beam F 'produced by such flared opening has, as shown in Figure 3b, a diverging shape for a dispersion of the washing liquid over a width I' greater than in the case of the opening 421a also oblong but of constant section.
[0057] La figure 4a illustre un autre mode de réalisation dans lequel les ouvertures 421a, 421 b des rampes 42a, 42b présentent une forme oblongue évasée dans une direction Δ perpendiculaire à la direction Da, D b des rampes.FIG. 4a illustrates another embodiment in which the openings 421a, 421b of the ramps 42a, 42b have an oblong shape flared in a direction Δ perpendicular to the direction D a , D b of the ramps.
[0058] Cette géométrie particulière offre l'avantage illustré sur la figure 4b de projeter le liquide de lavage sous la forme de faisceaux étroits Fa, Fb s'étendant autour des directions moyennes da, db de projection, perpendiculairement aux directions Da, Db des rampes 42a, 42b.This particular geometry offers the advantage illustrated in FIG. 4b of projecting the washing liquid in the form of narrow bundles F a , F b extending around the mean directions d a , d b of projection, perpendicular to the directions. D a , D b ramps 42a, 42b.
[0059] L'impact du liquide projeté sur la vitre est donc augmenté dans le sens de la profondeur d'une distance L par rapport à l'impact ponctuel obtenu avec un jet rectiligne produit par un simple trou. La répartition du liquide sur la vitre se trouve ainsi encore améliorée dans le sens d'une mouillabilité plus grande de la vitre et d'un nettoyage plus efficace et plus rapide, notamment dans des conditions de nettoyage particulièrement difficiles.The impact of the liquid sprayed on the window is thus increased in the direction of the depth of a distance L with respect to the point impact obtained with a straight jet produced by a single hole. The distribution of the liquid on the glass is thus further improved in the direction of greater wettability of the glass and cleaning more effective and faster, especially in particularly difficult cleaning conditions.
[0060] Sur la figure 5b, on peut voir que la surface de l'impact d'un faisceau de liquide sur la vitre est encore augmentée si l'on donne aux ouvertures 421 'a de la rampe 42a une forme telle que le faisceau projeté, tel que F'a par exemple, s'étende également sur une distance I dans le sens de la largeur, c'est-à-dire dans une direction perpendiculaire à la direction moyenne da de projection.In Figure 5b, we can see that the impact surface of a liquid beam on the glass is further increased if we give the openings 421 'of the ramp 42a a shape such that the beam Proposed as F ', for example, also extends over a distance I in the widthwise direction, that is to say in a direction perpendicular to the mean direction of a projection.
[0061] Pour ce faire, la figure 5a montre un exemple de réalisation dans lequel les ouvertures 421 'a, 421 'b ont une forme conique, par exemple conique de révolution. Bien entendu d'autres formes permettraient d'obtenir le même résultat, comme une forme tétraédrique par exemple. To do this, Figure 5a shows an embodiment wherein the openings 421 'a, 421' b have a conical shape, for example conical revolution. Of course other forms would achieve the same result, such as a tetrahedral form for example.

Claims

Revendications claims
1. Dispositif de projection d'un liquide de lavage sur une vitre de véhicule, comprenant au moins une rampe (42a, 42b) munie d'au moins une ouverture (421a, 421 b) destinée à projeter ledit liquide sur ladite vitre dans une direction (da, db) donnée, caractérisé en ce qu'au moins une ouverture (421a, 421 b) présente une forme apte à projeter le liquide de lavage dans une direction (da, db) inclinée par rapport à un plan perpendiculaire (P) à ladite rampe.1. Apparatus for spraying a washing liquid on a vehicle window, comprising at least one ramp (42a, 42b) provided with at least one opening (421a, 421b) for projecting said liquid onto said window in a direction (d a , d b ) given, characterized in that at least one opening (421a, 421b) has a shape adapted to project the washing liquid in a direction (d a , d b ) inclined with respect to a plane perpendicular (P) to said ramp.
2. Dispositif selon la revendication 1 , dans lequel, ladite rampe comportant une pluralité d'ouvertures, les directions (da, db) de projection desdites ouvertures (421a, 421 b) sont parallèles.2. Device according to claim 1, wherein, said ramp having a plurality of openings, the directions (d a , d b ) of projection of said openings (421a, 421b) are parallel.
3. Dispositif selon la revendication 1 , dans lequel, ladite rampe comportant une pluralité d'ouvertures, les directions (da1) de projection d'un premier groupe (G ai) d'ouvertures et les directions (da2) de projection d'un deuxième groupe (Ga2) d'ouvertures sont antiparallèles.3. Device according to claim 1, wherein, said ramp having a plurality of apertures, the directions (d a1 ) of a first group projection (G ai) apertures and the directions (d a2 ) projection d a second group (G a2 ) of openings are antiparallel.
4. Dispositif selon la revendication 3, dans lequel lesdits premier (Ga1) et deuxième (Ga2) groupes d'ouvertures sont séparés par un troisième groupe (G a3) d'ouvertures dont les directions (da3) de projection sont contenues dans un plan (P) perpendiculaire à ladite rampe (42a).4. Device according to claim 3, wherein said first (G a1 ) and second (G a2 ) groups of openings are separated by a third group (G a3) of openings whose directions (d a3 ) projection are contained in a plane (P) perpendicular to said ramp (42a).
5. Dispositif selon la revendication 2, comprenant deux rampes (42a, 42b) de projection parallèles, et dans lequel les directions (da) de projection des ouvertures d'une rampe (42a) et les directions (db) de projection des ouvertures de l'autre rampe (42b) sont parallèles.5. Device according to claim 2, comprising two parallel projection ramps (42a, 42b), and wherein the directions (d a ) for projecting the openings of a ramp (42a) and the directions (d b ) for projecting the projections. openings of the other ramp (42b) are parallel.
6. Dispositif selon la revendication 5, dans lequel les directions de projection (da) des ouvertures d'une rampe (42a) et les directions (db) de projection des ouvertures de l'autre rampe (42b) sont confondues deux à deux.6. Device according to claim 5, wherein the directions of projection (d a ) openings of a ramp (42a) and the directions (d b ) of the openings of the other ramp (42b) coincide two to two.
7. Dispositif selon l'une des revendications 3 ou 4, comprenant deux rampes (42a, 42b) de projection parallèles, et dans lequel les directions (da1, da2) de projection des ouvertures d'une rampe (42a) et les directions (db1, db2) de projection des ouvertures de l'autre rampe (42b) sont antiparallèles.7. Device according to one of claims 3 or 4, comprising two parallel projection ramps (42a, 42b), and wherein the directions (d a1 , d a2 ) for projecting openings of a ramp (42a) and the directions (d b1 , d b2 ) of the openings of the other ramp (42b) are antiparallel.
8. Dispositif selon l'une quelconque des revendications 1 à 7, dans lequel au moins une ouverture (421a, 421b) présente une forme apte à projeter le liquide de lavage sous la forme d'un faisceau (Fa, Fb) s'étendant autour de la direction (da, db) de projection, perpendiculairement à ladite rampe (42a, 42b). 8. Device according to any one of claims 1 to 7, wherein at least one opening (421a, 421b) has a shape adapted to project the washing liquid in the form of a beam (F a , F b ) s extending around the projection direction (d a , d b ) perpendicular to said ramp (42a, 42b).
9. Dispositif selon la revendication 8, dans lequel ladite ouverture (421a, 421 b) présente une forme oblongue perpendiculairement à ladite rampe (42a, 42b).9. Device according to claim 8, wherein said opening (421a, 421b) has an oblong shape perpendicular to said ramp (42a, 42b).
10. Dispositif selon la revendication 9, dans lequel ladite ouverture présente une forme oblongue évasée perpendiculairement à ladite rampe.10. Device according to claim 9, wherein said opening has an oblong shape flared perpendicularly to said ramp.
11. Dispositif selon la revendication 8, dans lequel ladite ouverture (421 'a, 421 'b) présente une forme également apte à projeter le liquide de lavage sous la forme d'un faisceau (F'a) s'étendant perpendiculairement à la direction (da) de projection.11. Device according to claim 8, wherein said opening (421 'a, 421' b) has a shape also capable of projecting the washing liquid in the form of a beam (F ' a ) extending perpendicular to the direction (d a ) projection.
12. Dispositif selon la revendication 11 , dans lequel ladite ouverture (421 'a, 421 'b) présente une forme conique.12. Device according to claim 11, wherein said opening (421 'a, 421' b) has a conical shape.
13. Dispositif selon la revendication 11 , dans lequel ladite ouverture présente une forme conique de révolution.13. Device according to claim 11, wherein said opening has a conical shape of revolution.
14. Dispositif selon la revendication 11 , dans lequel ladite ouverture présente une forme tétraédrique.14. Device according to claim 11, wherein said opening has a tetrahedral shape.
15. Dispositif selon l'une quelconque des revendications 1 à 14, comprenant deux rampes (42a, 42b) de projection parallèles, et dans lequel les ouvertures ménagées le long desdites rampes sont disposées en quinconce.15. Device according to any one of claims 1 to 14, comprising two parallel projection ramps (42a, 42b), and wherein the openings along said ramps are arranged in staggered rows.
16. Balai d'essuyage comportant un dispositif de projection de liquide selon l'une quelconque des revendications 1 à 15. 16. A wiper blade comprising a liquid splash device according to any one of claims 1 to 15.
PCT/EP2009/054265 2008-04-15 2009-04-08 Device for spraying washing liquid onto a car window WO2009127585A1 (en)

Applications Claiming Priority (2)

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FR0802084 2008-04-15
FR0802084A FR2929906B1 (en) 2008-04-15 2008-04-15 DEVICE FOR SPRAYING WASHING LIQUID ON A GLASS OF A VEHICLE.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2961457B1 (en) * 2010-06-21 2013-04-26 Valeo Systemes Dessuyage WIPER BLADE WITH INTEGRATED SPRINKLER DEVICE
DE102011010708A1 (en) * 2011-02-09 2012-08-09 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Windscreen wiper with several wiper lips and integrated wiper water channel
DE102011011702A1 (en) * 2011-02-18 2012-08-23 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Windshield wiper arrangement for motor vehicle, comprises wiper arm, which is movably mounted along vehicle windshield, where two flexible wiper lips are provided, between which holding element is arranged
EP2786906B1 (en) * 2011-12-02 2019-11-27 Mitsuba Corporation Wiper blade

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695607A1 (en) * 1992-09-14 1994-03-18 Journee Paul Sa Wiper blade for vehicle windscreen - has washing liquid feed system located inside deflector affixed to blade assembly
FR2747975A1 (en) * 1996-04-30 1997-10-31 Valeo Systemes Dessuyage Integrated windscreen wiper, deflector and washer spray
WO2007000346A1 (en) * 2005-06-29 2007-01-04 Valeo Systemes D'essuyage Wiping device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695607A1 (en) * 1992-09-14 1994-03-18 Journee Paul Sa Wiper blade for vehicle windscreen - has washing liquid feed system located inside deflector affixed to blade assembly
FR2747975A1 (en) * 1996-04-30 1997-10-31 Valeo Systemes Dessuyage Integrated windscreen wiper, deflector and washer spray
WO2007000346A1 (en) * 2005-06-29 2007-01-04 Valeo Systemes D'essuyage Wiping device

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FR2929906A1 (en) 2009-10-16

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