FR3115749A1 - Device for projecting a cleaning fluid - Google Patents

Abstract

Device for projecting a cleaning fluid for the windshield. The invention relates to a cleaning fluid projection device (18) configured to be positioned on an arm (2) of a wiper assembly, the projection device (18) comprising at least one pivoting member (40) around an axis of rotation (R), a means (42) for locking the projection device (18) in rotation and a means (44) for holding the projection device (18) in position, the pivoting member (40) allowing at least the pivoting of the projection device (18) around the axis of rotation (R) between an initial position and a final position in which the projection device (18) is fixed on the arm ( 2), the locking means (42) locking the projection device (18) in rotation in its final position and the holding means (44) forming an axial stop of the projection device (18) in a direction parallel to the axis of rotation (R), the projection device (18) being characterized in that the means for locking ge (42) and the holding means (44) are separate from each other, each forming a projection from one side of the projection device (18). Fig.3

Description

Device for projecting a cleaning fluid

The technical field of the present invention is that of glass surface wiping assemblies, in particular of a windshield, of a motor vehicle, and more particularly such wiping assemblies equipped with a fluid spraying device of cleaning.

Typically, a wiper assembly intended to equip a motor vehicle comprises at least one wiper blade adapted to come into contact with a glazed surface such as the windshield of a motor vehicle and at least one arm to which the broom and which is connected to the vehicle via drive means configured to drive, in particular in rotation, the arm and the broom attached to the arm. The wiper blade conventionally comprises a wiping blade, generally made of rubber, intended to rub against the glazed surface of the vehicle to evacuate water and/or dirt by bringing it outside the driver's field of vision. .

In order to increase the cleaning performance of the windshields by the wiping assemblies, it is known to associate therewith a device for projecting a cleaning fluid configured to project the cleaning fluid onto the glass surface before sweeping , said cleaning fluid facilitating the removal of dirt in particular.

Among the different types of projection devices, a projection device associated with the arm is known in particular, in an application known by the Anglo-Saxon name "wet arm" and in which a fluid supply hose extends along of the arm to a projection device placed in the vicinity of the end of the arm and provided with a projection orifice oriented towards the glazed surface. In order to secure the projection devices to the arms of the wiper assemblies, it is known to equip the projection devices with a pin configured to form, with an orifice of corresponding shape and size present on the arm, pivoting means so that the projection device can be moved in rotation during mounting between an original position and a fixing position in which the projection device is along the arm. Furthermore, such a projection device is equipped with a fixing lug, forming a housing for receiving the arm on which the projection device is fixed, said fixing lug being elastically deformable and provided at a free end with a finger latching, which is configured to both ensure a rotational stop of the projection device when it is in the fixing position and a displacement stop relative to the arm parallel to the axis of rotation. In order for the latching finger to be able to be sufficiently separated and to allow the arm to pass in the direction of the receiving housing, before resuming its original position when the projection device is in its fixing position, the fixing lug which carries this snap finger must have high elastic deformation properties. The latching finger being arranged at the free end of this fixing lug, the fixing lug undergoes a significant deflection.

A problem with the projection devices as they have just been described then lies in the fact that the fixing lugs present a risk of breakage and at the very least of premature wear.

The object of the present invention is therefore to overcome this drawback by designing a projection device whose attachment to an arm of a wiping assembly has greater wear resistance than previous projection devices.

The invention therefore relates to a device for spraying cleaning fluid configured to be positioned on an arm of a wiper assembly, the spraying device comprising at least one member for pivoting about an axis of rotation, a means for locking the projection device in rotation and a means for holding the projection device in position, the pivoting member allowing at least the pivoting of the projection device about the axis of rotation between an original position and a position end in which the projection device is fixed on the arm, the locking means locking the projection device in rotation in its final position and the holding means forming an axial stop of the projection device in a direction parallel to the axis of rotation, the projection device being characterized in that the locking means and the holding means are separate from each other, each forming a projection of a e face of the projection device.

The arm is part of a wiping assembly comprising at least said arm and a blade configured to be in contact with a glass surface of a motor vehicle. More specifically, so that the broom can clean the glazed surface of the motor vehicle from rain and/or dirt that may interfere with the driving of the motor vehicle, the broom is moved along the glazed surface following the movement, in particular of rotation, of the arm to which it is connected, for example via a yoke of the arm and a connection device associated with the brush, said arm being connected to a drive motor housed within the motor vehicle.

The cleaning fluid projection device makes it possible to increase the effectiveness of the cleaning of the glass surface, in particular a windshield, by the brush by spraying a cleaning fluid against the glass surface of the motor vehicle as close as possible to the brush. In order to fix the projection device on the arm and allow its position as close as possible to the broom, in particular at the level of the yoke, the projection device is first attached against the arm using the pivoting member as a means of indexing, to bring the fixing device into a precise release position. The projection device is thus positioned laterally with respect to the arm, and in particular the yoke. The pivot member makes it possible to pivot the projection device facing the arm, between an original position, or release position, in which the projection device is angularly offset with respect to the surface of the arm intended ultimately to be in contact with the projection device, and a fixing position in which the projection device faces said surface. This fixing position is defined in particular by the cooperation of the locking means with a corresponding element on the arm, and the projection device is configured so that in this fixing position, the holding means separate from the locking means is active, in gaze from the surface of the arm.

Advantage is taken of the projection device according to the invention in which the holding means and the locking means are separate from each other in that the attachment of the projection device to the arm of the wiper blade is more reliable and durable over time. The locking means has greater hardness and strength than the prior art, in particular because the locking means projects directly from one face of the projection device and not from the holding means. Furthermore, the configuration of the holding means, which does not carry the locking means, makes it possible to reduce its properties of elastic deformation necessary for the installation of the projection device on the yoke.

According to an optional characteristic of the invention, the pivot member can be formed by an orifice or a stud, capable of cooperating with a corresponding male or female form formed on the arm, for example on the yoke of the arm. According to another optional characteristic of the invention, the locking means can take the form of a lug capable of cooperating with a receiving window formed on the arm, for example on the yoke of the arm.

According to one characteristic of the invention, the locking means and the holding means are arranged on the projection device at a non-zero distance from each other.

More precisely, the locking means and the holding means each comprise a free end between which the non-zero distance which separates them is measured. According to an example of the invention, the distance between the locking means and the holding means is between 3 and 5 millimeters.

According to one characteristic of the invention, the projection device comprises at least one positioning face intended to be at least partly in contact with the arm, the locking means and the holding means each forming a projection from said positioning face. It is therefore understood that the locking means and the holding means protrude from the same face of the projection device while being at a non-zero distance from each other. Furthermore, according to an optional characteristic of the invention, the pivot member is also an element projecting from this positioning face of the projection device.

The holding member has a bent shape allowing one face of this holding member to face the positioning face of the projection device from which the holding member projects. More particularly, the bent shape participates in forming a space for receiving a wall of the arm so as to be able to sandwich this wall of the arm, where applicable of the yoke of the arm, between the holding member and the face of the arm. positioning of the projection device.

According to one characteristic of the invention, the locking means comprises at least a first face forming a ramp and a second opposite face forming a stop face.

The first face extends along a plane inclined with respect to the plane of the face of the arm, here the positioning face, from which the locking means protrudes. The second face extends along a plane perpendicular or substantially perpendicular to this same face of the arm.

The first face of the locking means which forms a ramp is the face closest to a first longitudinal edge of the positioning face of the projection device, it being noted that this first longitudinal edge of the positioning face is the longitudinal edge of this positioning face closest to the wall of the arm when the projection device is in the release position. In this way, during the pivoting of the projection device along the arm to assume its fixing position, it is this first longitudinal edge which is first in contact with the arm, and it is therefore the first face of the means of lock which is the first in contact with the arm during this pivoting. The ramp shape then allows the arm to slide on the first face during the pivoting according to a first direction of pivoting, and this sliding generates an axial separation, along the axis of rotation defined by the pivoting member, of the device projection relative to the arm.

The second face, forming a perpendicular stop face, makes it possible to block the pivoting movement according to a second direction of pivoting opposite to the first direction of pivoting mentioned above, when the projection device is in its fixing position by cooperation of the means of locking with the receiving window formed on the yoke. It is understood that this cooperation is particularly effective when the locking means can be fully received in the receiving window so that no protruding element prevents the projection device from being pressed against the arm. The fixing position is therefore obtained after an axial movement of approach, in a direction opposite to that of the separation movement previously mentioned.

According to a characteristic of the invention, the second face of the locking means extends opposite the holding means.

In this way, and in accordance with what was previously mentioned, the holding means cooperates with the wall of the arm, on which the fixing device is attached, after the latter has been in contact with the locking means.

According to one characteristic of the invention, the holding means comprises at least one base and one covering wall, the base protruding from the positioning face of the projection device and the covering wall extending from the base in the direction of the locking means and comprising a free end edge opposite the base.

More precisely, the covering wall extends the base perpendicularly in the direction of the locking means, such that said covering wall extends parallel to the positioning face of the projection device. The free end of the holding means is then understood to mean the edge of the covering wall formed opposite the base of the said holding means. In other words, the non-zero distance which separates the holding means and the locking means is measured between the second face of the locking means and the free end edge of the holding means.

According to one characteristic of the invention, the covering wall of the holding means comprises at least one internal face opposite the positioning face, at least one chamfer being made at the junction of the internal face of the holding means and its free end edge.

The chamfer of the holding means is then able to cooperate with a chamfered leading edge formed on the yoke of the arm during the rotation between the release position and the fixing position. Such cooperation between the chamfer of the holding means and the leading edge of the clevis makes it easier to install the spraying device on the clevis of the arm of the wiper blade and to slide the clevis under the internal face of the covering wall.

The invention also relates to a wiper assembly comprising at least one arm, a wiper blade and a cleaning fluid projection device according to any one of the preceding characteristics, the arm comprising at least one complementary pivoting member capable of cooperating with the pivot member of the projection device and a receiving window of the locking means of the projection device, the receiving window and the locking means having complementary shapes.

According to a characteristic of the wiping assembly, the arm comprises at least one chamfered leading edge capable of cooperating with the chamfer of the means for holding the projection device.

It is understood that the complementary pivoting member of the arm, in particular of the yoke, has a shape complementary to that of the pivoting member of the projection device, such that they form a male-female assembly. It is also understood that the complementary pivoting member and the pivoting member are configured to allow rotation of the projection device relative to the arm around an axis defined by these pivoting members. Similarly, the reception window has dimensions adapted to receive the locking means of the projection device.

The invention also relates to a method for assembling a wiper assembly according to the preceding characteristics, during which the projection device is rotated around its pivoting member engaged on the arm, between a position of disengagement and a fixing position, the method being characterized in that during the rotation of the projection device, when the arm comes into contact with the locking means of the projection device, the projection device is moved axially, according to the axis of rotation of the projection device, away from the arm such that the holding means comes into contact with the arm, said holding means deforming elastically to allow rotation of the projection device to its fixing position wherein the locking means cooperates with the receiving window of the arm.

During the rotation of the projection device, the presence of the locking means projecting from the positioning face of the projection device, that is to say the face intended to be in contact with the arm in the fixing position, forces a spacing, or distance, of the arm relative to the projection device. More particularly, it should be understood that it is here the positioning face of the projection device which is considered with respect to the arm, so that the distance, or spacing, mentioned above must be understood as an increase in the axial distance, in a direction parallel to the axis of rotation of the projection device, between the positioning face and the wall of the arm against which the projection device must rest in the fixing position.

At the same time, due to the arrangement of the holding means, with a covering wall which extends with respect to the wall of the arm on the side opposite to the positioning face so as to enclose the wall of the arm, this axial displacement generates a rapprochement of the wall of the arm in the direction of the holding means, and more particularly of the covering wall, until contact is ensured between the holding means and the wall of the arm. This contact generates an elastic deformation which tends to separate the covering wall to allow the passage of the wall of the arm in the reception space formed between the covering wall of the holding means and the positioning face. The elastic return forces, which tend to return the retaining means to its original position, contribute to pushing the wall of the arm in the direction of the positioning face, which makes it possible to ensure the housing of the locking means as soon as possible. in the associated receive window.

Advantage is taken of the method of assembling the wiper assembly, which results in particular from the arrangement with a locking means distinct from the holding means, in that it involves a reduction in the elastic deformation of the holding means which is necessary for the locking means to cooperate with the receiving window formed in the arm. The locking means is not here carried by the holding means, so that the spacing of the projection device with respect to the wall of the arm when the latter is in contact with the ramp of the locking means does not imply not immediately a deflection of the holding means. The bending stress period of the holding means is therefore shorter and the holding means is subjected to less stress. Furthermore, the holding means having no function to carry the locking means, the vertical distance from the covering wall, that is to say in a direction oriented towards the locking means, can be reduced to the strict necessary for the axial blocking function of the wall of the arm, and the elastic deformation stresses are thus attenuated.

Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below by way of indication in relation to the drawings in which:

is a general perspective view of a wiper assembly according to the invention, showing in particular an arm and a broom, as well as a cleaning fluid projection device and a supply hose;

is a perspective view of a yoke of the arm of the wiper assembly of the and the cleaning fluid projection device attached to this arm;

is a perspective view of the projection device of the ;

is a view from another perspective angle of the projection device of the , shown partially to make the locking means and the holding means more visible;

is a perspective view of the yoke forming the end of the arm of the ;

is a perspective view of the cooperation between the projection device and the yoke of the arm, according to a perspective angle similar to that of the , with the projection device in a release position;

is a cross-sectional view of the projection device and arm, with the projection device in the release position of the ;

is a perspective view of the cooperation between the projection device and the yoke of the arm, according to a perspective angle similar to that of the , with the projection device in an intermediate position between the release position and the fixing position;

is a cross-sectional view of the projection device and the arm, with the projection device in the intermediate position of the ;

is a perspective view of the cooperation between the projection device and the yoke of the arm, according to a perspective angle similar to that of the , with the projection device in the fixing position;

is a cross-sectional view of the projection device and arm, with the projection device in the attachment position of the .

It should first be noted that if the figures expose the invention in detail for its implementation, these figures can of course be used to better define the invention, if necessary. It should also be noted that these figures only show exemplary embodiments of the invention. Finally, it should be noted that the same references designate the same elements in all the figures.

On the is illustrated a wiping assembly 1 comprising at least one arm 2 and a blade 4 for wiping a windshield of a motor vehicle. More specifically, the function of the wiper blade 4 is to eliminate rain and/or debris present on the windshield of the motor vehicle so as not to obstruct the vision of a user of said vehicle. To this end, the wiper blade 4 is connected to the arm 2 of the wiper assembly 1, said arm 2 being capable of driving the blade 4 in motion under the effect of a drive motor, not visible , housed in the motor vehicle and to which said arm 2 is connected. a first end 8 of said arm 2, opposite the drive motor arranged in the vicinity of a second end 10 of arm 2 and along a main direction of elongation P of wiper assembly 1.

Fork 6 of arm 2, particularly visible at the or at the , comprises a body 12 elongated in a longitudinal direction L, parallel or substantially parallel to the main direction of elongation P of the wiper assembly 1. A first portion 14 of the yoke 6 intended to be fixed to the first end 8 of arm 2 of wiper assembly 1, and a second portion 16 of yoke 6 intended to be integral with wiper blade 4 and a device 18 for spraying a cleaning fluid according to invention. The projection device 18 will be mentioned later in the following detailed description. The projection device is in particular powered by a hydraulic connection hose 19.

The second portion 16 of the yoke 6 comprises at least one upper wall 20 and two side walls 22 which each extend perpendicularly from the upper wall 20 and parallel to each other such that the second portion 16 of the yoke 6 has a U-shape inside which is received the previously mentioned connection device. As is particularly visible at the , each of the side walls 22 of the yoke 6 comprises at least one return edge 24 in the direction of the opposite side wall to partially close the volume 26 defined by the yoke 6.

A light 28, visible , is formed on the upper wall 20 of the yoke 6, to cooperate with a clip of the connection device not visible here and secured to the wiper blade 4. It is understood that when mounting the wiper blade 4 on the arm 2 , said brush 4 and the associated connection device slide in the second portion 16 of the yoke 6 along the longitudinal direction L of the latter, by means of the return edges 24 which form a guide rail and until the clip carried by the connection device cooperates with the slot 28 of the arm 2. This ensures adequate fixing of the blade 4 with the arm 2 of the wiper assembly 1.

As seen at the , one of the side walls 22 of the second portion 16 of the yoke 6 carries the projection device 18 of cleaning fluid. In the remainder of the detailed description, the coupling wall 30 will refer to the side wall 22 of the second portion 16 of the yoke 6 which carries the projection device 18. The cooperation between the projection device 18 and the coupling wall 30 of the yoke 6 will now be described in more detail with reference to Figures 2 to 6.

The projection device 18 has the function of projecting a cleaning fluid against the windshield of the motor vehicle in order to facilitate its cleaning and in particular to facilitate the removal of solid debris from said windshield. To this end, the projection device 18 comprises at least one end piece 32, visible at the , adapted to be connected to the hose 19, connected to a reservoir of cleaning fluid housed within the motor vehicle and not shown here. The end piece 32 of the projection device 18 is in particular arranged at the level of a first longitudinal end 34 of the said projection device 18 along the longitudinal direction L of the yoke 6.

At least one outlet orifice 36 for the cleaning fluid is formed on the projection device 18 to allow the projection of the fluid, the orifice here being arranged at the level of a second longitudinal end 38 of the latter, opposite to the first end longitudinal direction 34 along the longitudinal direction L of the yoke 6. It is understood that a circulation channel, not visible, is formed inside the projection device 18 along the longitudinal direction L of the yoke 6, from the tip 32 from where it enters to the outlet orifice 36 to allow the fluid to be projected. This channel can in particular be obtained by appropriate cavities formed in half-shells 181, 182, produced separately by injection operations and welded to each other to form the projection device as a whole.

In order to secure the projection device 18 against the coupling wall 30 of the yoke 6, said projection device 18 comprises at least one pivot member 40, a means 42 for locking the projection device 18 in rotation and a means for holding 44 in position of the projection device 18. According to the invention, and as will be detailed below, the locking means 42 and the holding means 44 are separate, which means in particular that the locking means is not not carried by the locking means.

More precisely, the pivot member 40 forms a pivot such that the projection device 18 is capable of pivoting about a transverse axis of rotation R. In the example of the invention illustrated, the pivot member 40 is a stud which protrudes from a positioning face 46 of the projection device 18. The term positioning face 46 designates the face of the projection device 18 which extends at least partly in contact with the arm, and more particularly with the coupling wall 30 of the yoke 6, when said projection device 18 is installed on said yoke 6 as can be seen at .

The projection device 18 is capable of pivoting between a release position, which forms a position of origin of the rotational movement around the transverse axis R, and a fixing position, which forms a final position of this rotational movement. .

More particularly, fixing position means a position, visible on the , in which the projection device 18 is installed in a suitable position with respect to the yoke 6 of the arm 2, allowing the projection of cleaning fluid according to an optimum orientation for the effectiveness of the projection against the dirt present on the glazed surface . In this fixing position, the projection device 18 extends mainly in a plane parallel to the longitudinal direction L of said yoke 6, and a contact is formed between the positioning face 46 and the coupling wall 30 of the arm, with the entire projection device which faces the coupling wall 30.

Furthermore, by release position is meant a position of the projection device 18 in which the projection device 18 extends mainly in a plane parallel to the longitudinal direction L of the said yoke 6, with a minimal portion of the projection device which is opposite the coupling wall 30, this minimal portion of the positioning face 46 being in contact with the coupling wall 30 of the arm.

As seen in Figures 2 and 5 for example, the coupling wall 30 of the yoke 6 comprises at least one complementary pivoting member 48, capable of cooperating with the pivoting member 40 of the projection device 18 as mentioned above . It is then understood from the foregoing that the complementary pivoting member 48 here takes the form of a hole in which can accommodate the stud forming the pivoting member 40 of the projection device 18. In order to allow movement and in particular the rotation of the pivot member 40 in the complementary pivot member 48, the latter have dimensions such that a clearance remains between them.

It should be noted that the male-female complementarity, which here makes it possible to ensure the pivoting of the projection device 18 along the arm, could be reversed with respect to what has been described without departing from the context of the invention, c ie with a male member, of the pin type, carried by the arm and a female member, of the hole type, formed in the projection device.

The locking means 42 of the projection device 18 is capable of locking the projection device 18 in rotation when the latter has reached the fixing position.

The locking means 42 extends from the positioning face 46 of said projection device 18, as is visible at the so as to cooperate with an element formed on the coupling wall 30 of the yoke 6. The locking means 42, forming a projection from the positioning face 46 of the projection device 18, comprises at least a first face 50 and a second face 52, the first face 50 taking the form of a ramp while the second face 52 forms a stop face. More precisely, the first face 50 extends along an inclined plane with respect to a plane in which the positioning face 46 extends, the inclined plane extending with respect to the plane of the positioning face 46 with a angle of inclination between 10° and 40°.

The second face 52 of the locking means 42 of the projection device 18 extends perpendicularly from the positioning face 46 to one end of the first face 50, such that these two faces form a projecting edge 54 of the 42. The projecting edge 54 of the locking means 42 is then considered to be the portion of the said locking means 42 furthest from the positioning face 46 of the projection device 18.

In order to block the projection device 18 in rotation, the locking means 42 is able to cooperate in the fixing position with a reception window 56 formed in the coupling wall 30 of the yoke 6. More precisely, the window receiving 56, visible in Figures 5 and 6, is formed in the coupling wall 30 such that it faces the locking means 42 when the projection device 18 is in its attachment position mentioned above. It is then understood that the reception window 56 forms a hollow opening, in the thickness of the coupling wall 30, the shape of which is complementary to the locking means 42, such that the latter is housed in said reception window 56 .

Here, the receiving window 56 consists of a hole passing through the coupling wall, but it should be noted that the receiving window could consist of a blind hole formed by hollowing out the outer surface of the coupling wall. The locking means 42 is then surrounded by the edges delimiting the reception window 56, and in particular the second face 52 is in abutment against an edge delimiting the window.

The holding means 44 of the projection device 18 has the function of forming an axial stop against the movement of said projection device 18 in a direction parallel to the axis of rotation R, and therefore parallel to the transverse direction T of the yoke and to ensure the pressing of the wall of the arm 2 against the positioning face 56 so that the locking means of the projection device 18 cooperates with the arm for sure. In other words, the holding means 44 is configured to perform an axial locking function which aims to ensure that in the fixing position the projection device is pressed against the arm, and in particular the yoke.

The holding means 44 forms a projection from the positioning face 46 of the projection device 18 and extends at a non-zero distance D from the locking means 42 mentioned above. More precisely, the holding means 44 extends facing the second face 52 of the locking means 42 and at the distance D from the latter.

The holding means 44 according to the invention comprises at least one base 58 and a cover wall 60. The base 58 of the holding means 44 then protrudes from the positioning face 46 of the projection device 18, while the cover 60 extends from base 58 in the direction of locking means 42. More specifically, base 58 extends substantially perpendicularly from positioning face 46 of projection device 18 and cover wall 60 extends substantially perpendicularly from the base 58 of the holding means 44, that is to say substantially parallel to the positioning face 46.

The cover wall 60 includes a free end edge 62 opposite the base 58, the free end edge 62 being at the non-zero distance D from the second face 52 of the locking means 42, the distance D being between three and five millimeters.

Thus, as mentioned, the two means, namely the locking means 42 and the holding means 44 are separate, extending at a distance from each other. The cover wall 60 extends projecting from the base 58 in a vertical direction, and the distance D between the holding means 44 and the locking means 42 is measured in this same vertical direction.

The cover wall 60 of the holding means 44 comprises at least one inner face 64 facing the positioning face 46 and such that it forms a space between them. More precisely, a reception space 66 of the coupling wall 30 is formed between the positioning face 46 and the internal face 64 of the covering wall 60 of the holding means 44. It is then understood that the insertion of at least a part of the coupling wall 30 within the reception space 66 of the holding device 44 axially blocks the projection device 18 with respect to the axis of rotation R of said holding device 18, at least a part of the coupling wall 30 being between the positioning face 46 and the internal face 64 of the holding device 18. In other words, the cover wall 60 is configured so as to form an axial stop which makes it possible to take into sandwich the coupling wall 30 of the arm, and in particular of the yoke 6 of the arm. The transverse dimension of the reception space 66, that is to say the transverse distance between the positioning face 46 and the internal face 64 of the cover wall 60, is substantially equal to the thickness of the wall of coupling. The elastic deformation properties of the cover wall 60, due to the configuration of the holding means 44 with this cover wall 60 which projects from the base 58, make it possible to ensure the pressing of the coupling wall 30 of the arm 2 against the positioning face 46 of the projection device 18.

In order to facilitate the insertion of a part of the coupling wall 30 within the reception space 66 of the holding means 44, a chamfer 68 is formed at the junction of the internal face 64 of the holding means 44 and of its free end edge 62 described previously. Similarly, the coupling wall 30 of the yoke 6 comprises at least one chamfered leading edge 70 capable of cooperating with the chamfer 68 formed on the holding means 44 of the projection device 18, the leading edge 70 being the edge of the coupling wall 30 intended to be the first edge in contact with the ramp of the locking means and then the holding means.

In the example shown, and as seen in particular in the , the yoke 6 of the arm 2 also comprises at least one fixing lug 72 which extends from the coupling wall 30 towards the outside of the yoke, that is to say opposite the volume 26 defined by the yoke 6. In other words, the fixing lug 72 of the coupling wall 30 extends in the direction of the projection device 18, when the latter is placed against the coupling wall, so that it is able to cooperate with a recess 74 formed at the level of the second longitudinal end 38 of the projection device 18, as particularly visible in Figures 3 and 6. The fixing lug 72 then has the function of reinforcing the hold between the yoke 6 and the projection device 18 when the latter is in its final position described previously.

A method of mounting the wiper assembly as just described will now be detailed with reference to Figures 6 to 11.

During a first step of the method, illustrated in particular in FIGS. 6 and 7, the pivoting member 40 carried by the projection device 18 is inserted into the complementary pivoting member 48 carried by the coupling wall 30 of the clevis 6. This linking of the pivoting means makes it possible to precisely position the fixing device in an end position corresponding to a release position. More precisely, during this first step and in said release position, the cooperation between the pivoting member 40 and the complementary pivoting member 48 is carried out so that the projection device 18 is pushed against a wall of the arm, in contact with the latter, and with an inclination such that only a minimal portion of the projection device faces the coupling wall. More particularly, in this released position, the projection device 18 and the coupling wall 30 each extend in a plane perpendicular or substantially perpendicular to the direction of the axis of rotation R of the projection device 18 and in such a way that the main direction of elongation of the projection device 18, in particular at the level of the positioning face 60, is inclined with respect to the direction of elongation of the coupling wall 30 of the arm 2.

In this disengaged position, the projection device 18 has a leading edge 76 which is close to the leading edge 70 of the coupling wall 30.

Once the pivoting member 40 is in cooperation with the complementary pivoting member 48, the projection device 18 is rotated on the yoke 6 around the axis of rotation R by rotating the pivoting member 40, in particular to reach an intermediate position as illustrated in Figures 8 and 9.

During this rotation of the projection device 18, the leading edge 70 of the coupling wall 30 comes to cover the leading edge 76 while approaching the locking means 42 and this until the coupling wall 30 of the arm 2 comes into contact with the locking means 42. More specifically, the coupling wall 30 of the yoke 6 comes into contact with the first face 50 of the locking member 42, forming the ramp.

The contact between the ramp of the locking means 42 and the coupling wall 30, combined with the continuity of the rotation of the projection device, generates an axial displacement of the projection device 18 along the axis of rotation R, such that the positioning face 46 of the projection device moves away from or moves away from the blocking wall 30 of the arm. In the intermediate position illustrated in Figures 8 and 9, the holding means 44 of the projection device 18, and more particularly the free end edge 62 of the covering wall 60 and its chamfer 68, comes into contact with the edge attack 70 of the blocking wall 30 due to the axial displacement which has just been mentioned.

There makes more particularly visible the axial distance E generated in this intermediate position between the positioning face 46 of the projection device and the blocking wall 30 of the arm. It is thus notable that the value of the thickness of the blocking wall 30 added to the value of the axial spacing E is greater than the value of the transverse dimension of the reception space 66, and therefore that the axial offset of the projection device 18 during rotation involves contact between the coupling wall 30 and the holding means 44.

More precisely, the chamfered leading edge 70 of the coupling wall 30 of the yoke 6 comes into contact with the free end edge 62 of the holding means 44 in the continuity of the rotation. The shape of the holding means 44, and its properties of elastic deformability, are such that, during this contact, the coupling wall forces an elastic deformation of the covering wall 60 of the holding means 44 to allow passage to the wall of the coupling. coupling 30 in the direction of the base 58 of the holding means. In other words, the chamfer 68 formed on the holding means 44 and the chamfered leading edge 70 formed on the coupling wall 30 cooperate in order to facilitate the elastic separation of the holding means 44 and to allow the continuation of the rotation of the projection device 18 along its axis of rotation R to the fixing position.

The projection device 18 can be moved in rotation along its axis of rotation R until its final position illustrated in Figures 10 and 11, that is to say until the locking means 42 cooperates with the reception window 56 formed on the coupling wall 30 of the yoke 6.

Advantageously, the elastic deformation stresses exerted on the retaining means by the passage of the coupling wall 30 in the reception space 66 are minimized due to the reduced vertical dimension of the covering wall.

The elastic return of the cover wall 60 to its original position tends to reduce the axial separation E and to press the coupling wall 30 against the positioning face 46 of the fixing device 18. When the final position of the projection 18 is reached, the locking means 42 is facing the receiving window 56 and the elastic return of the covering wall ensures that the locking means 42 is well lodged in the receiving window 56, as illustrated on there . It is also understood that when the projection device 18 is in its final position, the fixing lug 72 of the yoke 6 is housed in the recess 74 of the projection device 18, participating in maintaining said projection device 18 in its final position. with respect to yoke 6 of arm 2, as shown in .

The projection device, and the mounting method, as they have just been described, therefore make it possible to ensure the fixing of the projection device 18 on the arm 2 of the wiper assembly 1, in particular by aiming to limit the wear of the holding means 44 which, by its elastic deformation properties, makes it possible to freeze the position of the projection device against the arm. The shape of the holding means, with a bending wall whose size is reduced in particular by the fact that it does not carry a locking means which is also necessary for fixing the projection device, makes it possible to limit the elastic deformation stresses undergone and therefore to limit the wear of the holding means.

The invention cannot however be limited to the means and configurations exclusively described and illustrated, and also applies to all means or configurations, equivalents and to any combination of such means or configurations.

Claims (10)

Cleaning fluid projection device (18) configured to be positioned on an arm (2) of a wiper assembly, the projection device (18) comprising at least one pivot member (40) around an axis of rotation (R), a locking means (42) in rotation of the projection device (18) and a means (44) for holding the projection device (18) in position, the pivot member (40) allowing the minus the pivoting of the projection device (18) around the axis of rotation (R) between an initial position and a final position in which the projection device (18) is fixed on the arm (2), the means (42) locking the projection device (18) in rotation in its final position and the holding means (44) forming an axial stop of the projection device (18) in a direction parallel to the axis of rotation (R ), the projection device (18) being characterized in that the locking means (42) and the means for m maintenance (44) are distinct from each other, each forming a projection from one side of the projection device (18). Cleaning fluid projection device (18) according to the preceding claim, in which the locking means (42) and the holding means (44) are arranged on the projection device (18) at a non-zero distance (D) one of the other. Cleaning fluid projection device according to one of the preceding claims, comprising at least one positioning face (46) intended to be at least partly in contact with the arm (2), the locking means (42) and the means holding (44) each forming a projection from said positioning face (46). Cleaning fluid projection device (18) according to one of the preceding claims, in which the locking means (42) comprises at least a first face (50) forming a ramp and a second opposite face (52) forming a stop. Cleaning fluid projection device (18) according to the preceding claim, in which the second face (52) of the locking means (42) extends opposite the holding means (44). Cleaning fluid projection device (18) according to one of the preceding claims in combination with claim 3, in which the holding means (44) comprises at least a base (58) and a covering wall (60), the base (58) projecting from the positioning face (46) of the projection device (18) and the cover wall (60) extending from the base (58) towards the locking means (42) and comprising a free end edge (62) opposite the base (58). Cleaning fluid projection device (18) according to the preceding claim, in which the covering wall (60) of the holding means (44) comprises at least one internal face (64) opposite the positioning face (46) , at least one chamfer (68) being formed at the junction of the inner face (64) of the holding means (44) and its free end edge (62). Wiper assembly (1) comprising at least one arm (2), a wiper blade (4) and a cleaning fluid projection device (18) according to any one of the preceding claims, the arm (2) comprising at least one complementary pivoting member (48) adapted to cooperate with the pivoting member (40) of the projection device (18) and a receiving window (56) of the locking means (42) of the projection device ( 18), the reception window (56) and the locking means (42) having a complementarity of shapes. Wiper assembly (1) according to the preceding claim, in which the arm (2) comprises at least one chamfered leading edge (70) capable of cooperating with the chamfer (68) of the holding means (44) of the projection (18). Method of assembling a wiper assembly (1) according to claims 8 or 9, during which the projection device (18) is rotated around its pivoting member (40) engaged on the arm ( 2), between a release position and a fixing position, the method being characterized in that during the rotation of the projection device (18), when the arm (2) comes into contact with the locking means ( 42) of the projection device (18), the projection device (18) is moved axially, along the axis of rotation (R) of the projection device, away from the arm (2) such that the holding means (44) comes into contact with the arm (2), said holding means (44) deforming elastically to allow rotation of the projection device (18) to its fixing position in which the locking means (42) cooperates with the receiving window (56) of the arm (2).