FR3097502A1 - Wiper blade, wiper system and cleaning module - Google Patents

Abstract

Wiper blade (10), in particular intended to equip a wiping system (5) with a device for protecting an optical element of a motor vehicle, the wiper blade (10) comprising at least two movable spacers (60) configured to maintain a spacing between the wiper blade (10) and a surface of the protective device of an optical element. Figure for the abstract: Fig. 3

Description

Wiper blade, wiper system and cleaning module

1. TECHNICAL AREA

The present invention relates to the field of wiper blades and more particularly to those configured to clean the protective surfaces of information and driving assistance sensors installed on certain motor vehicles.

STATE OF THE ART

Currently, many optical elements are fitted to a large number of motor vehicles in order to facilitate the parking of the latter, or even to offer the motor vehicle a certain autonomy. In this second case, mention may be made, without limitation, of line crossing detectors, automatic emergency braking systems, adaptive cruise control or even blind spot detection devices.

Such optical elements are generally installed on the outside of the motor vehicle, such as for example at the level of the roof, the front or rear fenders, the mirrors, or even the side pillars of the windshield of the motor vehicle. Thus, these optical elements are highly exposed to organic or mineral dirt, such as for example dust or insects, and also to bad weather which can leave traces of water for example in the field of vision of the optical element which can affect its proper operability. It is therefore appropriate to equip these optical elements with wiping systems.

Such optical elements are generally equipped with protective surfaces against external dirt. In the case where a wiping system is intended to clean a flat protective surface by performing a pivoting movement around an axis parallel to the flat protective surface, the gap between the flat surface to be cleaned and the brush d The wiper system wiper moves during the pivoting movement of the wiper blade. In other words, the gap is not constant, which can cause difficulties. The wiper blade may not properly clean the surface at the ends of the wiper blade.

There may in particular be detachment of the wiper blade(s) from the flat protective surface of the optical element during the cleaning phases, which may reduce the performance of the wiper blades.

An object of the present invention is to provide a simple, effective and economical solution to this problem.

To this end, the subject of the invention is a wiper blade, in particular intended to equip a wiper system of a device for protecting an optical element of a motor vehicle, the wiper blade glass comprising at least two movable spacers configured to maintain a gap between the wiper blade and a surface of the protective device of an optical element.

The movable spacers thus avoid crushing the wiping blade against the surface.

The invention may further comprise one or more of the following aspects taken alone or in combination:

- the at least two movable spacers of the wiper blade are in particular spaced from each other along the main body of the wiper blade;

- the movable spacers are carried by guide supports which are formed in one piece with the main body of the wiper blade;

- the number of mobile spacers is equal to three and the mobile spacers are arranged at the vertices of an isosceles triangle;

- the guide supports are located at the ends of the main longitudinal body of the windscreen wiper blade;

- the movable spacers carried by the guide supports of the main body of the wiper blade are rollers and the guide supports are configured to cooperate with said rollers, like a hub;

- the mobile spacers are made of unfilled plastic or plastic covered with EPDM;

- the guide supports comprise holding lugs distributed regularly around a central axis specific to each guide support;

- the retaining lugs are arranged to form a cruciform space between them;

- the retaining tabs have different stiffnesses from each other;

- the main body of the wiper blade comprises means for retaining a wiper blade, the retention means comprising on the one hand a closed end and on the other hand an open end at which is located a lug configured to prevent the wiper blade from coming out of the retention means;

- at least one of the movable spacers is configured to act as an abutment for the wiper blade carried by the retaining means of the main body of the wiper blade;

- the main body of the wiper blade is made of a composite material or a plastic material, in particular reinforced with glass fibres;

- the wiper blade is produced by plastic injection or moulding;

- the wiper blade fitted to the protective device of an optical element is configured to clean with a wiper blade a surface of the protective device of an optical element;

- the wiper blade comprises a connecting means intended to connect the wiper blade to a drive arm of said wiper blade, the connecting means being a finger ball joint allowing at least two degrees of freedom between the wiper blade and the wiper blade drive arm;

- the axis of the finger of the ball joint can be perpendicular to the longitudinal axis of the wiper blade;

- the ball joint can be configured to cooperate with guide slots formed in the drive arm of the wiper blade so as to allow, on the one hand, a rolling movement of the wiper blade around an axis parallel to the longitudinal axis of the wiper blade and on the other hand a pitching movement of the wiper blade around the axis of the finger of the finger ball joint.

The invention also relates to a wiper system comprising a wiper blade as described above and a drive arm configured to drive said wiper blade. The arm includes, for example, guide slots configured to cooperate with the finger ball joint of the wiper blade so as to allow the wiper blade relative movement with respect to the drive arm of the wiper blade - glass according to the at least two degrees of freedom authorized by the finger ball joint.

The wiper system may also include an elastic return member disposed between the base and the arm, configured to bias the wiper blade against the surface of the device for protecting an optical element.

The invention also relates to a cleaning module for a device for protecting an optical element. The optical element is for example located on the roof of the motor vehicle, so as to be exposed at 360° to its environment. The cleaning module comprises for example a movable arm in rotation driven by a motor around an axis of revolution. The arm is equipped with at least one wiping system as described above comprising a base fixed to the arm, the base being linked to the drive arm by a pivot connection. The wiper blade is configured to cooperate with the drive arm to clean with a wiper blade a surface of the optical element protection device.

Other characteristics and advantages of the invention will emerge from the following description, given by way of example and without limitation, with reference to the appended drawings in which:

shows a partial isometric view of a cleaning module with a first example of a wiping system;

shows an isometric view of a detail of the cleaning module of Figure 1;

shows an isometric view of another example of a wiper system;

shows an isometric view of a front face of the wiper blade of the wiper system of Figure 3, the front face being oriented in the direction of progression of the wiper blade during its movement;

represents an isometric view of the wiper blade of FIG. 4 turned over by 180°;

shows an isometric view of the wiper system of Figure 3 seen from above;

shows a sectional view along plane VII of the wiper blade of Figure 4;

shows an isometric view of a closed end of another exemplary embodiment of the wiper blade with a first exemplary guide bracket;

shows an isometric view of an open end of the wiper blade of Figure 8; And

shows an isometric view of another embodiment of a guide support.

DETAILED DESCRIPTION OF THE INVENTION

In all the figures, the elements having identical functions bear the same reference numbers.

The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference is to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

Illustrated in FIG. 1 is a cleaning module 1 equipping, for example, a device for protecting an optical element. The device for protecting an optical element has a surface 2, fixed, preferably flat and transparent, configured to protect the optical element against external dirt.

The cleaning module 1 comprises an arm 3 movable in rotation around an axis of revolution Y. The arm 3 is equipped with a wiping system 5 comprising a base 11 fixed to the arm 3, a drive arm 12 of a wiper blade 10, the drive arm 12 being connected to the base 11 by a pivot connection. This wiper system 5 also comprises a wiper blade 10 configured to cooperate with the drive arm 12 to clean with a wiper blade 22 the surface 2 of the device for protecting an optical element.

The wiping system may also include an elastic return member 13, visible for example in another embodiment in Figure 3, located between the base 11 and the drive arm 12. The elastic return member 13 is configured to urge the drive arm 12 against the surface 2 of the device for protecting an optical element, in particular to press the wiper blade 10 and more precisely the wiper blade 22 against the surface 2.

The elastic return member 13 is for example a helical spring arranged coaxially with the axis of the pivot connection between the base 11 and the drive arm 12.

This device for protecting an optical element is for example installed outside the motor vehicle, such as for example at roof level. This can be, for example, a lane crossing detector or an automatic emergency braking system.

The arm 3 is caused to move in rotation according to a back and forth movement on an angular sector under the effect of a motor around the axis of revolution Y during the cleaning phase. The wiping system 5, mounted on the arm 3 via the base 11, is thus also driven in an alternating rotational movement around the axis of revolution Y.

There is illustrated in Figure 2 in an enlarged view a kinematics of the path of the wiping system of the cleaning module 1. More specifically, the wiping system 5 is illustrated in an intermediate position and the wiping system 5 'is shown in an end position. By rotating the arm 3 (not shown) the wiping system moves over the surface 2, along a linear path comprising the two positions shown.

Figure 3 shows another example of wiper system 5 in more detail. This example of wiper system 5 also comprises a base 11, a drive arm 12 of a wiper blade 10 and a wiper blade 10 carrying a wiper blade 22.

In a way common to the different embodiments of the wiper systems 5, the drive arm 12 has a longitudinal shape. The wiper blade 10 is linked to a first end of the drive arm 12 and the second end of the drive arm 12 is linked to the base 11 which is used to fix the wiper system 5 on the arm 3. The wiper blade 10 extends in a main direction defining the longitudinal axis X of the wiper blade 10.

The wiper blades 10 of the wiper system 5, 5' of FIG. 2 are caused to move in the two directions of movement F1 perpendicular to the axis of rotation Y and attached to the same direction of progression. The directions of movement F1 are materialized by a double arrow in figure 2. The direction of progression of the wiper blade is approximately tangent to the end of the arm 3 in rotation around the axis Y.

The wiper blade 10 is configured to carry a wiper blade 22. The wiper blade 22 is for example made of rubber or elastomer. Optionally, the wiping blade 22 can include heating means such as resistive heating wires. In addition, the wiper blade 22 has a plane of symmetry P (see for example in Figures 3 to 9), in which is included the longitudinal axis X of the wiper blade 10.

As best seen in the section of Figure 7, the wiper blade 10 comprises for example a retention means 20 of the wiper blade 22 extending for example parallel to the longitudinal axis X of the wiper blade. wiper 10 and configured to hold the wiper blade 22. The retention means 20 of the wiper blade 22 is for example configured in the manner of a profiled frame. More specifically, the cross section of the retention means 20 has for example a C or claw shape so as to pinch a part 22a of the wiper blade 22.

According to a first embodiment of the wiper blade illustrated in Figures 8 and 9, the retention means 20 comprises on the one hand a closed end 23 (Figure 8) and on the other hand an open end 25 (Figure 9 ) at which is located a lug 57.

The lug 57 forms a non-return device to prevent the wiper blade 22 from coming out of the retention means 20. The lug 57 has for example the shape of a ramp, flat or curved, the part of which more projecting is oriented towards the closed end 23 of the retention means 20. The lug 57 is for example formed in one piece with the main body of the wiper blade 10.

To mount the wiper blade 22 in the retention means 20, the wiper blade 22 is introduced via the open end 25 and slid along the retention means 20 until it comes into abutment against the closed end 23 During assembly, the wiper blade 22 is elastically deformed by the lug 57 and regains its initial shape after its complete insertion into the retention means 20. In its mounted configuration, the wiper blade 22 is of a hand in abutment against the closed end 23 and on the other hand in abutment against the most projecting part of the lug 57.

The wiper blade 10 is for example made of plastic or composite material such as polypropylene, polyacetal, polyamide, or polyester, in order to have a lighter structure than a metal structure for example. The material used is notably reinforced with glass fibers to solidify the structure of the wiper blade 10.

The wiper blade 10 is for example produced by plastic injection or by molding. These manufacturing processes are suitable for the plastics and/or composites mentioned above and make it possible to faithfully and reliably transcribe the complex shapes of the structure of the wiper blade 10. In addition, these manufacturing processes make it possible to produce this part in large quantities which makes it possible to amortize the cost of the mould.

As illustrated in Figure 2, the wiper blade 10 comprises at least two movable spacers 60 configured to maintain a gap between the wiper blade 10 and the surface 2 of the protective device of an optical element. The mobile spacers 60 thus avoid crushing the wiping blade 22 against the surface 2.

The movable spacers 60 are for example carried by guide supports 50 formed in one piece with the main body of the wiper blade 10. The guide supports 50 are for example identical to each other and the movable spacers 60 are for example identical to each other. Each guide support 50 carries for example a mobile spacer 60. Alternatively (not shown), the same guide support 50 can carry several mobile spacers 60.

The guide supports 50 are located for example at the ends of the main longitudinal body of the wiper blade 10. The position of the guide supports 50 is such that at least one guide support 50 is located in the extension of the longitudinal axis X of the wiper blade 10.

In a first embodiment illustrated in Figures 1 and 2, the number of movable spacers 60 is two and the same applies to the guide supports 50. The latter are located in the extension of the longitudinal axis X of the wiper blade 10 and then allow linear support between the wiper blade 10 and the surface 2.

In a second embodiment illustrated in Figures 3 to 7, the number of movable spacers 60 is equal to three and the same applies to the guide supports 50. The movable spacers 60 are arranged for example at the ends of the body longitudinal main of the wiper blade 10 so as to form the vertices of an isosceles triangle.

In this configuration, one of the guide supports 50 carrying at least one movable spacer 60 is located at a first end of the wiper blade 10 and in the extension of the longitudinal axis X of the wiper blade. wiper blade 10 while the other two guide supports 50, each carrying at least one movable spacer 60, are located at the other end of the wiper blade 10 and are placed symmetrically on both sides. other from the plane of symmetry P of the wiper blade 22.

The first end of the wiper blade 10 at which a single guide support 50 is located is for example the end farthest from the base 11. The second end of the wiper blade 10 at the level of which two guide supports 50 are located is, conversely, the end closest to the base 11.

In the configuration where the wiper blade 10 comprises three guide supports 50 each carrying a movable spacer 60 in contact with the surface 2 during the cleaning phase, a flat support exists between the wiper blade 10 and the window 2. This flat support is ensured by the contact at three distinct and non-aligned points between the movable spacers 60 and the surface 2 and has the advantage of maximizing the stability of the wiper blade 10 while ensuring wiping homogeneous surface 2 along the wiper blade 10.

In common to the different embodiments of Figures 1 to 7, at least one of the movable spacers 60 can be configured to serve as a stop for the wiper blade 22 carried by the retention means 20 of the main body of the blade. wiper 10. This mobile spacer 60 is then located on the side of the open end 25 of the retention means 20, in the extension of the longitudinal axis X, as illustrated in FIG. 3. The mobile spacer 60 can for example at least partially cover the opening of the open end 25. The movable spacer obstructs the exit of the wiper blade 22 from the retention means 20. Thus at least one of the movable spacers 60 participates in maintaining and/or retaining the wiper blade 22.

The guide supports 50 are for example manufactured during the same manufacturing process as the wiper blade 10, which has the advantage of minimizing the number of parts and reducing production costs. The movable spacers 60 carried by the guide supports 50 of the wiper blade 10 are for example composed of an unfilled plastic, that is to say without any reinforcement such as fiberglass, in order to minimize surface wear 2; compositions such as nylon, PTFE, or polyacetal, to give three examples, could therefore be envisaged. Alternatively, the movable struts 60 could be composed of a hard and/or reinforced plastic center covered with a softer rubber, elastomeric or plastic composition such as EPDM.

Each mobile spacer 60 is for example mobile in rotation around a central axis W specific to each guide support 50 and visible in FIGS. 4 and 5. The mobile spacers 60 are for example rollers. In this case, the guide supports 50 are configured to cooperate with said rollers, like a hub. The wheels have for example a diameter of 5 to 15 millimeters; however, it is understood that this dimension may vary depending on the configuration of the device.

The rollers allow the mobile spacers 60 to evolve in rolling without slipping on the surface 2 during the cleaning phase, which limits the wear of the mobile spacers 60. Alternatively, the mobile spacers 60 can for example be skates.

According to an embodiment illustrated with FIGS. 3 to 6, 8 and 9, the guide supports 50 each comprise, for example, holding lugs 55 in the shape of a quarter tube. The retaining lugs 55 are evenly distributed around the central axis W specific to each guide support 50, as illustrated in Figure 4.

These retaining lugs 55 are for example four in number per guide support 50 and they are configured to carry movable spacers 60, as illustrated in FIGS. 5 and 6. They allow in particular a simple assembly as well as a reliable maintenance of the spacers mobile 60 on the guide supports 50.

According to another embodiment of the guide supports 50 illustrated in FIG. 10, the retaining lugs 55a, 55b have different stiffnesses from each other.

For example, a holding tab 55a has the general shape of a right-angled triangle with a hypotenuse in an arc of a circle and a right angle pointing towards the central axis W, this shape is referenced 55a in FIG. 10. The side in an arc of a circle is for example convex. An alternative shape that can be envisaged for the retaining tabs 55b is for example a general quadrilateral shape having for example at least one convex side, referenced 55b in Figure 10.

The retaining lugs 55a and 55b are for example arranged symmetrically with respect to the plane of symmetry P. In the example illustrated by FIG. 10, two retaining lugs 55a are arranged symmetrically with respect to the plane P and the same is true for the retaining tabs 55b.

Since the geometry of the retaining tabs 55a and 55b is not the same, these have different stiffnesses from each other. In a case chosen by way of illustrative example, two holding lugs 55a are for example thinner and therefore less stiff than the other two holding lugs 55b.

The less stiff retaining lugs 55a are for example more capable of being elastically deformed when mounting the movable spacers 60 on a guide means 50. The low-stiffness retaining lugs 55a are then able to exert an elastic return force allowing a solid hold of the movable spacer 60 on the guide means 50.

In a manner common to all the embodiments, the retaining lugs 55, 55a, 55b are for example arranged to form a cruciform space between them, visible for example in FIGS. 5 and 8. The vertical portion of this cruciform space has a dimension of the same order of magnitude as the width of the wiper blade 22 and is configured to participate in the insertion and possibly the retention of the wiper blade 22. On the side of the open end 25, the horizontal portion of this cruciform space corresponds to the extension of the cross section of the retention means 20 having for example a C or claw shape, visible in Figure 7.

In the embodiment of the wiper blade 10 illustrated by FIGS. 3 to 7, the latter comprises a connecting means intended to connect the wiper blade 10 to the drive arm 12. The connecting means is a finger ball joint 40 allowing at least two degrees of freedom between the wiper blade 10 and the arm 12.

The finger ball joint 40 is for example formed in one piece with the main body of the wiper blade 10. As illustrated in FIGS. 3 to 6, the finger ball joint 40 is for example located opposite the wiper blade 22 and in the middle of the wiper blade main body 10.

The finger ball joint 40 comprises for example a ball 42 with center O. In order to facilitate understanding of the embodiments detailed in the remainder of the text, an orthonormal marker comprising three axes A, B and C is attached to the center O, as illustrated in Figures 4 to 6. The axis A is perpendicular to the plane of symmetry P of the wiper blade 22, while the center O and the axes B and C are included in the plane of symmetry P. In addition, the axis C is parallel to the longitudinal axis X of the wiper blade 10.

The finger ball joint 40 comprises a finger 45 of cylindrical shape whose axis is perpendicular to the longitudinal axis X of the wiper blade 10 and whose ends 44a and 44b project from the ball 42. The diameter of the cylinder forming the finger 45 is less than the diameter of the ball 42 of the ball joint with finger 40. The height of the finger 45 is greater than the diameter of the ball 42 of the ball joint with finger 40.

The finger 45 can be made of a cylindrical part which crosses on either side the ball 42 of the finger ball joint 40 or be simply formed by two ends 44a and 44b of two cylinders arranged on either side of the ball 42. The ends 44a and 44b of the finger 45 extend for example symmetrically on either side of the plane of symmetry P of the wiper blade 22. The finger ball joint 40 thus has an identical plane of symmetry to the plane of symmetry P.

The drive arm 12 of the wiper blade 10 comprises for example guide slots 17a and 17b which are visible in Figures 3 and 6, to cooperate with the finger ball joint 40 of the wiper blade 10, so as to allow the wiper blade 10 relative movement with respect to the drive arm 12 of the wiper blade 10 according to the at least two degrees of freedom authorized by the finger ball joint 40.

The guide slots 17a and 17b of the drive arm 12 are partly delimited by tongues 16 forming a cavity of a shape complementary to the shape of the finger ball joint 40 of the wiper blade 10. Each tongue 16 comprises a convex extrados face and a concave intrados face. The concave intrados faces of the tongues 16 preferably form a spherical cavity of a shape complementary to the shape of the finger ball joint 40 of the wiper blade 10. The center of the spherical cavity formed by the concave intrados faces of the tongues 16 is preferentially coincides with the center O of the finger ball joint 40. In other words, the tabs 16 envelop part of the finger ball joint 40 to form the connection between the drive arm 12 and the wiper blade 10.

The number of tabs 16 is for example two. In this case, the drive arm 12 has for example a symmetrical structure with respect to a plane of symmetry S of the drive arm 12, this plane of symmetry S is visible in FIGS. 3 and 6. In the particular case of FIG. 3, the plane of symmetry P of the wiper blade 22 and the plane of symmetry S of the drive arm 12 coincide.

The two guide slots 17a and 17b face each other for example on either side of the plane of symmetry S of the drive arm 12. These two guide slots 17a and 17b are each delimited by a tab 16 and a side wall 18 of the drive arm 12, as for example illustrated in Figure 3.

The two guide slots 17a and 17b allow the correct operation of the finger ball joint 40 between the wiper blade 10 and the drive arm 12. They cooperate with the finger 45 of the finger ball joint 40 which passes to through them. In other words, the two guide slots 17a and 17b each form a fork intended to serve as a stop for the finger 45 of the finger ball joint 40.

An opening 19 delimited by the two tabs 16 is made at the end of the drive arm 12. The opening 19 can be symmetrical with respect to the plane of symmetry S of the drive arm 12, as illustrated in FIG. 6.

The finger ball joint 40 allows the wiper blade 10 to be movable in rotation and/or oscillation around the axis A, that is to say around the axis of the finger 45 of the finger ball joint 40 The opening 19 located at the end of the drive arm 12 can serve as a stop for the main longitudinal body of the windscreen wiper blade 10 to delimit the amplitude of this movement. This potential movement of the wiper blade 10 is a pitching movement and is a first degree of freedom of the geometry of the finger ball joint 40.

A second degree of freedom is the rotation and/or the oscillation of the wiper blade 10 around the axis C, as illustrated in FIG. 6. This degree of freedom allows an inclination of the wiper blade 10 with respect to the drive arm 12, within the limits of the stops of the guide slots 17a and 17b of the arm 12. The guide slots 17a and 17b thus delimit the angle φ between the plane of symmetry P of the blade of wiper 22 and the plane of symmetry S of the drive arm 12.

In the case of FIG. 6, this angle inclination φ is at its maximum value, that is to say that the end 44b of the finger 45 of the finger ball joint 40 is in abutment against the guide slot 17b of the arm drive arm 12. The angle φ then designates the maximum inclination of the wiper blade 10 with respect to the drive arm 12. For information, this angle φ could be up to 60°, depending on the implementation. This potential movement of the wiper blade 10 relative to the arm 12 is a rolling movement and is a second degree of freedom of the finger ball joint 40.

The rotation around the axis B is prevented by the cooperation of the finger 45 of the finger ball joint 40 with the guide slots 17a and 17b. In other words, the guide slots 17a and 17b obstruct the yaw movement of the wiper blade 10 relative to the drive arm 12. Similarly, any translation between the wiper blade 10 and the arm drive arm 12 is made impossible by the very nature of the finger ball joint 40 between the wiper blade 10 and the drive arm 12.

Thus the ball joint 40 is intended to cooperate with the two guide slots 17a and 17b formed in the drive arm 12 of the wiper blade 10 so as to allow on the one hand a rolling movement of the wiper blade. wiper 10 around the axis C of the ball joint 40 and on the other hand a pitching movement of the wiper blade 10 around the axis A of the finger 45 of the ball joint with finger 40.

Thanks to the finger joint 40, the wiper blade 10 can then evolve around two distinct axes of rotation A and C which allows control of the inclination of the wiper blade 22 with respect to the surface. 2 as well as a pitching of the wiper blade 10 relative to the drive arm 12, allowing the wiper blade 22 to remain in contact with the surface 2 throughout the cleaning phase despite the evolution of the gap between surface 2 and arm 3.

The support generated by the movable spacers 60 between the wiper blade 10 carrying the wiper blade 22 and the surface 2 of the device for protecting an optical element is maintained throughout the cleaning phase in particular by the torque exerted by the elastic return member 13 between the support 11 and the drive arm 12 and in particular thanks to the finger ball joint 40 between the drive arm 12 and the wiper blade 10. The degrees of freedom authorized by the finger ball joint 40 allow the wiper blade 10 and in particular the wiper blade 22 to be placed in an optimal manner for effective wiping of the surface 2.

In addition, the finger joint 40 allows the wiper blade 10 to be positioned in an optimal manner during a change of direction for the progression of the wiper blade 10. Indeed, the end of the wiping blade 22 in contact with the surface 2 undergoes a reversal ("flip" in English) when changing direction. The ball joint 40 allows the easy inclination of the wiper blade 10 around the axis C which facilitates the reversal of the end of the wiper blade 22 in contact with the surface 2. However, the inclination of the wiper blade 10 with respect to the surface 2 is framed by the guide slots 17a, 17b, so that the wiper blade 22 remains sufficiently straight at the ends of its path on the surface 2 so as not to prevent its reversal.

The arm 3 performs reciprocating movements in rotation around the axis of revolution Y under the effect of a motor which is for example arranged in a protected manner at the level of the roof of the motor vehicle, for example in the cockpit.

Claims (13)

Wiper blade (10), in particular intended to equip a wiper system (5) of a device for protecting an optical element of a motor vehicle, the wiper blade (10) comprising at least two movable struts (60) configured to maintain a gap between the wiper blade (10) and a surface (2) of the optical element protection device. Wiper blade according to Claim 1, characterized in that the movable spacers (60) are carried by guide supports (50) which are formed in one piece with the main body of the wiper blade (10). Wiper blade according to any one of Claims 1 to 2, characterized in that the number of mobile spacers (60) is equal to three and in that the mobile spacers (60) are arranged at the vertices of an isosceles triangle. Wiper blade according to Claim 2 or according to Claim 3 in conjunction with Claim 2, characterized in that the guide supports (50) are located at the ends of the longitudinal main body of the wiper blade (10 ). Wiper blade according to any one of Claims 2 and 4 or according to Claim 3 in conjunction with Claim 2, characterized in that the movable spacers (60) carried by the guide supports (50) of the main body of the wiper blade (10) are rollers and in that the guide supports (50) are configured to cooperate with said rollers, like a hub. Wiper blade according to any one of the preceding claims, characterized in that the movable spacers (60) are made of unfilled plastic or plastic coated with EPDM. Wiper blade according to any one of Claims 2, 4 or 5 or according to any one of Claims 3 or 6 in conjunction with Claim 2, characterized in that the guide supports (50) comprise tabs holding (55) regularly distributed around a central axis (W) specific to each guide support (50). Wiper blade according to the preceding claim, characterized in that the retaining lugs (55) are arranged to form a cruciform space between them. Wiper blade according to any one of Claims 7 to 8, characterized in that the retaining lugs (55, 55a, 55b) have different stiffnesses from one another. Wiper blade according to any one of the preceding claims, characterized in that the main body of the wiper blade (10) comprises means (20) for retaining a wiper blade (22) , the retention means (20) comprising on the one hand a closed end (23) and on the other hand an open end (25) at the level of which is located a lug (57) configured to prevent the blade from coming out wiping (22) out of the retaining means (20). Wiper blade according to Claim 10, characterized in that at least one of the movable spacers (60) is configured to serve as a stop for the wiper blade (22) carried by the retaining means (20 ) of the wiper blade main body (10). Wiper system characterized in that it comprises a wiper blade (10) according to one of the preceding claims and a drive arm (12) configured to drive said wiper blade (10) . Cleaning module (1) for a device for protecting an optical element, the cleaning module being characterized in that it comprises an arm (3) movable in rotation about an axis of revolution (Y), the arm (3) being equipped with at least one wiping system (5) according to claim 12, the wiping system (5) comprising a base (11) fixed to the arm (3), the base (11) being connected to the drive arm (12) by a pivot connection, the wiper blade (10) being configured to cooperate with the drive arm (12) to clean with a wiper blade (22) the surface (2) the device for protecting an optical element.