Wiper arm adapter unit and adapter unit

Abstract

The invention relates to a wiper arm adapter unit, which is provided for coupling, in particular detachably coupling, to a wiper arm, has a windshield surface provided for blocking air flowing through and for pressing a wiper blade against a vehicle window, and has a wiper blade adapter unit receptacle provided for receiving a wiper blade adapter unit pivotably about a bearing axis, wherein the wiper blade adapter unit is provided for receiving a wiper blade. It is provided that the windshield surface and the bearing axis enclose a main angle between 25° and 65°, preferably between 40° and 50°.

Description

Technical Field

[0001] The invention relates to a wiper arm adapter unit, which is provided for coupling, in particular detachably coupling, to a wiper arm and has a wind deflector surface. The invention also relates to an adapter unit, which comprises the wiper arm adapter unit. Background Art

[0002] A wiper device has been proposed which comprises a wiper arm and a wiper blade and a wiper arm adapter unit for releasably coupling the wiper arm and the wiper blade. Such a wiper device has the disadvantage that the wiper arm always has to exert a high pressing force for pressing the wiper blade against the vehicle windshield in order to ensure adequate wiping performance. Summary of the invention

[0003] The present invention describes a wiper arm adapter unit, which is configured to be coupled, in particular detachably coupled, to a wiper arm, has a windshield surface configured to block air flowing through and to press a wiper blade against a vehicle window, and has a wiper blade adapter unit receptacle, which is configured to receive the wiper blade adapter unit pivotably about a bearing axis, wherein the wiper blade adapter unit is configured to receive a wiper blade, characterized in that the windshield surface and the bearing axis enclose a main angle between 25° and 65°, preferably between 40° and 50°.

[0004] This has the advantage that the windshield surface presses the wiper blade against the vehicle window due to the travel wind flowing through the windshield surface during faster driving. This increases the total contact force of the wiper blade on the vehicle window and improves the wiping performance. In this way, the required contact force with which the wiper arm presses the wiper blade against the vehicle window is reduced. A cheaper and / or simpler and / or more reliable and / or more compact wiper arm with a smaller contact force, in particular with a smaller spring for applying the contact force, can be used. Furthermore, the use of the windshield surface according to the invention prevents the wiper arm adapter unit or the wiper device (comprising the wiper arm adapter unit, the wiper blade and the wiper arm) from generating forces due to unfavorable aerodynamics during faster driving, which forces oppose the required contact force and thus impair the wiping performance or even make wiping impossible. The wiper arm adapter unit according to the invention ensures that the forces generated due to aerodynamic effects, in particular wind, in particular travel wind, press the wiper blade against the vehicle window.

[0005] Advantageously, the wiper arm adapter unit is designed integrally with the windshield surface and / or the wiper blade adapter unit receptacle. In this context, integrally is to be understood in particular to mean a materially fused connection, for example, achieved by a welding process and / or an adhesive bonding process or the like, and particularly advantageously to mean formed, for example, by casting and / or by manufacturing in a single-component or multi-component injection molding process. Advantageously, the wiper arm adapter unit can be fixedly connected to the wiper arm, in particular so that the wiper arm, in the state connected to the wiper arm adapter unit, does not move as much as possible relative to the wiper arm adapter unit.

[0006] A wiper blade adapter unit is to be understood as an adapter which has a contact region for a wiper blade or a wiper blade component and which can be connected to the wiper blade or the wiper blade component, advantageously fixedly connected, in particular connected in such a way that the wiper blade, in the state connected to the wiper blade adapter unit, does not move as much as possible relative to the wiper blade adapter unit. Advantageously, the wiper blade adapter unit has a connecting element which is provided for pivotable coupling to a wiper blade adapter unit receptacle of the wiper arm adapter unit. Advantageously, the wiper blade adapter unit is designed integrally with the contact region and / or the connecting element. It is also conceivable that the wiper blade adapter unit is designed integrally with the wiper blade or the wiper blade component.

[0007] Advantageously, the wiper blade adapter unit receptacle is designed such that the bearing axis is arranged perpendicularly or as perpendicularly as possible to the wiper arm direction. The wiper arm direction is to be understood as a direction which is arranged in the direction of the maximum longitudinal extension of the wiper arm mounted on the wiper arm adapter unit. In the non-mounted state, the wiper arm direction is the direction in which the mounted wiper arm points, especially on the wiper arm adapter unit in the basic position. As perpendicular as possible is to be understood as meaning that the first axis and the second axis enclose an angle which deviates from 90° by no more than 8°, advantageously by no more than 5°, particularly advantageously by no more than 2°. Advantageously, the bearing axis is arranged parallelly or as parallelly as possible to the set wiping direction. As parallel as possible is to be understood as meaning that the first axis and the second axis enclose an angle which deviates from 0° by no more than 8°, advantageously by no more than 5°, particularly advantageously by no more than 2°. Advantageously, the bearing axis is arranged such that the bearing axis is arranged parallel or as parallel as possible to the wind flow direction or the vehicle driving direction when the wiper device (comprising the wiper arm adapter unit, the wiper blade and the wiper arm) is not wiping and is stationary. The wind flow direction is to be understood as the direction through which the driving wind flows when the wiper device is not wiping and is stationary. Particularly advantageously, the bearing axis is parallel to the vehicle window when mounted on the vehicle, preferably parallel to the vehicle window in every position during the wiping movement.

[0008] The main angle is understood to be the angle that the windshield surface has relative to the bearing axis. Advantageously, the main angle is measured around the direction of the wiper arm. The main angle on the front side between 0° and 90° describes the windshield surface, which is at least partially turned in the direction of the wind flow. The closer the main angle is to 90°, the stronger the windshield surface is turned in the direction of the wind flow. Advantageously, the main angle is extended between the bearing axis and the projection of the bearing axis onto the windshield surface, wherein the projection is advantageously carried out along a projection plane, the bearing axis is located in the projection plane, and the projection plane is arranged perpendicularly or as perpendicularly as possible to the direction of the wiper arm. It is also possible that the projection plane is extended by the normal vector or the average normal vector of the bearing axis and the windshield surface. In the case of curved or uneven windshield surfaces, it is conceivable that the main angle is extended between the bearing axis and the tangent plane, wherein the tangent plane is located in a marked point of the windshield surface, for example in a midpoint, or the tangent plane of the average normal vector is the windshield surface. An average normal vector is understood to be a vector which represents the average value of all or nearly all normal vectors of the windshield surface.

[0009] Advantageous embodiments of the wiper arm adapter unit can be achieved by means of the features mentioned below.

[0010] Since the wind deflector surface is at least partially concave in the direction of the bearing axis, the aerodynamic properties are further improved. The extrusion pressure generated by the driving wind can be further increased. Concave is to be understood in particular as meaning that the wind deflector surface is curved into the wiper blade adapter unit.

[0011] The wiper arm adapter unit is further improved if the wind deflector surface is designed to be convex at least in sections in the direction of the bearing axis. The wind flow along the wind deflector surface can be kept as laminar or turbulence-free as possible by the convex extension of the wind deflector surface. This makes it possible to achieve a stable and as constant as possible contact pressure. In particular, vibrations are prevented in this way, which could generate disruptive noises and / or could damage the wiper arm adapter unit and / or the wiper device or could impair their wiping performance. Convex is to be understood in particular as meaning that the wind deflector surface is arched out from the wiper blade adapter unit.

[0012] Particularly advantageous are wind deflector surfaces which are partially convex and partially concave. In this way, the contact pressure and / or the flow characteristics of the traveling wind can be precisely adapted to the technical requirements. For example, the wind deflector surface can be convex on the edge of the wind deflector surface facing the wind and concave on the edge of the wind deflector surface facing away from the wind.

[0013] In an advantageous variant, the wind deflector surface is designed to be flat at least in places in the direction of the bearing axis. This allows for a precise adaptation of the extrusion pressure and / or the flow characteristics of the traveling wind.

[0014] The edge facing the wind is to be understood in particular as an edge of the windshield surface, preferably a part of the periphery of the windshield surface, which is arranged closest to the wind flow direction in the non-wiping, static state of the wiper device (comprising the wiper arm adapter unit, the wiper blade and the wiper arm) mounted on the vehicle windshield, so that the driving wind first flows over or impinges on the side of the windshield surface facing the wind. Preferably, the windshield surface is designed so that the edge facing the wind is arranged at least partially perpendicularly or as substantially perpendicularly to the wind flow direction in the non-wiping, static state of the wiper device mounted on the vehicle windshield.

[0015] The edge facing away from the wind is to be understood in particular as an edge of the windshield surface, preferably a part of the periphery of the windshield surface, which is arranged farthest from the wind flow direction in the non-wiping, static state of the wiper device (comprising the wiper arm adapter unit, the wiper blade and the wiper arm) mounted on the vehicle windshield, so that the driving wind finally flows over or impinges on the side of the windshield surface facing away from the wind. Preferably, the windshield surface is designed such that the edge facing away from the wind is arranged at least partially perpendicularly or as substantially perpendicularly to the wind flow direction in the non-wiping, static state of the wiper device mounted on the vehicle windshield.

[0016] The wiper arm adapter unit is further developed when the wiper arm adapter unit has a rear axis, the rear axis being arranged on the side of the wiper arm adapter unit facing away from the wind and on the bottom side of the wiper arm adapter unit or the side facing away from the wind deflector surface and being arranged as parallel as possible to the direction of the wiper arm, and the wind deflector surface having a vertical minimum distance to the rear axis of between 0.8 cm and 2.0 cm, preferably between 1.0 cm and 1.5 cm, and the wind deflector surface having a vertical maximum distance to the rear axis of between 1.5 cm and 3.0 cm, preferably between 2.0 cm and 2.5 cm. In this way, the wind deflector surface is arranged outside a post sleeve which is assumed to have a post axis around the rear axis and a post radius of between 0.8 cm and 2.0 cm, preferably between 1.0 cm and 1.5 cm. In this way, the wind deflector surface is arranged inside a post sleeve which is assumed to have a post axis about the rear axis and a post radius of between 1.5 cm and 3.0 cm, preferably between 2.0 cm and 2.5 cm. A wind deflector surface shaped in this way provides particularly good aerodynamic properties and at the same time provides sufficient structural space for the wiper arm adapter unit or adapter unit.

[0017] If the wiper arm adapter unit has a wiper arm receptacle which, with the windshield surface, encloses a wiper arm angle of between -15° and 15°, preferably between -5° and 5°, then the wiper arm can be accommodated in an aerodynamically particularly advantageous manner. This improves the aerodynamic properties of the system consisting of the wiper arm adapter unit and the wiper arm and improves the aerodynamic properties of the wiper device as a whole. A wiper arm receptacle is understood to be an opening for accommodating a wiper arm and / or a wiper rod of a wiper arm. A wiper arm angle is understood to be the angle which is spanned between an opening direction pointing in the direction of the maximum extension of the wiper arm receptacle and the windshield surface. The mounted wiper arm is arranged with respect to the windshield surface at the wiper arm angle. A negative wiper arm angle means that the opening direction with respect to the windshield surface in the mounted state of the wiper arm adapter unit points in the direction of the vehicle window with the side of the opening facing away from the wind. A positive wiper arm angle means that the opening direction relative to the wind deflector surface in the mounted state of the wiper arm adapter unit points with the opening side facing away from the vehicle window.

[0018] The aerodynamics of the wiper arm adapter unit are further improved when a front tangent at a point in front of the wind deflector surface and the bearing axis enclose a front angle of between 30° and 70°, preferably between 45° and 55°, wherein the front point is located on the edge of the wind deflector surface facing the wind and the front tangent is arranged in a plane perpendicular to the direction of the wiper arm. The front angle is spanned between the part of the front tangent pointing from the front point in the direction of the wind flow and the bearing axis.

[0019] The aerodynamics of the wiper arm adapter unit are further improved when a rear tangent at a rear point on the wind deflector surface and the bearing axis enclose a rear angle of between 10° and 60°, preferably between 25° and 35°, wherein the rear point is located on the edge of the wind deflector surface facing away from the wind and the rear tangent is arranged in a plane perpendicular to the direction of the wiper arm. The rear angle is spanned between the part of the rear tangent pointing from the rear point in the direction of the wind flow and the bearing axis.

[0020] The aerodynamics of the wiper arm adapter unit are further improved when a central tangent at a central point on the wind deflector surface and the bearing axis enclose a central angle of between 25° and 65°, preferably between 40° and 50°, wherein the central point is located centrally between the edge of the wind deflector surface facing away from the wind and the edge facing the wind, and the central tangent is arranged in a plane perpendicular to the direction of the wiper arm. The central angle is spanned between the part of the central tangent pointing from the central point in the direction of the wind flow and the bearing axis.

[0021] If the wiper arm adapter unit has an air guide surface which is arranged on the edge of the wind deflector surface facing away from the wind and which encloses an air guide angle with the bearing axis of between -25° and -65°, preferably between -40° and -50°, this has the advantage that turbulence behind the wind deflector surface is minimized. A negative air guide angle means that the air guide surface is inclined relative to the bearing axis in the mounted state of the wiper arm adapter unit with the side of the air guide surface facing away from the wind in the direction of the vehicle window.

[0022] Turbulence on the side of the wind deflector surface facing away from the direction of the wind flow can be minimized even better if the air guide surface has a height offset of between 1 mm and 6 mm, preferably between 2 mm and 5 mm, particularly preferably between 3 mm and 4 mm relative to the wind deflector surface, wherein the height offset extends along the surface normal of the wiper arm adapter base surface. In the mounted state of the wiper arm adapter unit, the wiper arm adapter base surface is preferably oriented parallel to or as close to parallel to the vehicle window.

[0023] Another possibility of preventing turbulence is that the wind deflector surface protrudes with its edge facing away from the wind by at least 1 mm, preferably by at least 2 mm, particularly preferably by at least 5 mm in the direction of the wind flow beyond the wiper arm adapter base surface. In this way, a spoiler is constructed that enables particularly advantageous air flow.

[0024] Particularly advantageously, the wiper arm adapter unit features a wiper rod of the wiper arm. Preferably, the wiper arm adapter unit is designed integrally with the wiper rod. This enables an aerodynamically particularly advantageous connection between the wiper arm adapter unit and the wiper arm. In this context, integral is to be understood in particular as a materially fused connection, for example, achieved by a welding process and / or an adhesive bonding process, and particularly advantageously as forming, for example, by casting and / or by production in a single-component or multi-component injection molding process.

[0025] The wiper arm adapter unit and the adapter unit of a wiper blade adapter unit according to the invention which are provided for accommodating a wiper blade have the advantage that, due to their improved aerodynamics, they are arranged with particularly low vibrations in the driving wind and therefore have a higher durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Exemplary embodiments of a wiper arm adapter unit according to the invention and of an adapter unit according to the invention are shown in the drawings and explained in more detail in the following description.

[0027] Figure 1 A wiper device having a wiper arm adapter unit is shown;

[0028] Figure 2shows a cross-section through a wiper arm adapter unit; and

[0029] Figures 3 to 6 Shown are sections through different variants of a wiper arm adapter unit. DETAILED DESCRIPTION

[0030] In different embodiment variants, identical components are provided with identical reference numerals.

[0031] exist Figure 1 , a wiper device 10 is schematically shown in a side view, which comprises an adapter unit 12, a wiper arm 14 and a wiper blade 16. The wiper blade 16 is designed as a flat wiper blade. The wiper blade 16 is provided for cleaning a vehicle window 18. The adapter unit 12 comprises a wiper arm adapter unit 20. The adapter unit comprises a wiper blade adapter unit 22. The wiper arm 16 comprises a wiper rod 24. In an embodiment, the main longitudinal extension direction of the wiper arm adapter unit is arranged parallel to the wiper arm direction 26. The main longitudinal extension direction of the wiper blade is arranged parallel to the wiper arm direction. In an advantageous variant, the main longitudinal extension direction of the wiper arm adapter unit is arranged at least as far as possible parallel to the wiper arm direction 26. In an advantageous variant, the main longitudinal extension direction of the wiper blade is arranged at least as far as possible parallel to the wiper arm direction.

[0032] Figure 2 Shown along line II-II (see Figure 1 ) Section through the wiper arm adapter unit 20 . Figure 2 The drawing plane of FIG. 2 is arranged perpendicular to the wiper arm direction 26. The wiper arm adapter unit has a wind deflector surface 28. The wiper arm adapter unit has a wiper blade adapter unit receptacle 30. The wiper blade adapter unit receptacle 30 is provided for receiving the wiper blade adapter unit 22 pivotably about a bearing axis 32. The main angle 34 between the wind deflector surface and the bearing axis is 40° in the exemplary embodiment.

[0033] In the exemplary embodiment, the wind deflector surface is partially convex. Starting from the edge 36 facing the wind, the wind deflector surface first extends convexly in the direction of the wind flow direction 38. In the exemplary embodiment, the wind flow direction 38 is oriented as parallel as possible to the support axis 32. The edge 36 facing the wind (see Figure 1 )exist Figure 2 The front point 40 is marked in FIG. 1 , which is located on the edge 36 facing the wind.

[0034] In the embodiment, the wind deflector surface is partially concave. Starting from the edge 42 facing away from the wind, the wind deflector surface first extends concavely in the opposite direction of the wind flow direction 38. The edge 42 facing away from the wind (see Figure 1 )exist Figure 2The rear point 44 is marked in FIG. 1 , which is located on the edge 42 facing away from the wind.

[0035] The rear axis 46 is arranged on a side 48 of the wiper arm adapter unit 20 facing away from the wind and on an underside 50 of the wiper arm adapter unit 20. In the exemplary embodiment, the rear axis 46 extends as far as possible parallel to the wiper arm direction 26. Figure 2 In the embodiment, the rear axis 46 extends perpendicularly to the plane of the drawing and is marked by a dot. In the embodiment, the minimum vertical distance 52 of the windshield surface relative to the rear axis is 1.2 cm. The maximum vertical distance 54 of the windshield surface relative to the rear axis is 2.3 cm.

[0036] In the embodiment, the wiper arm adapter unit has a wiper arm receptacle 56. The wiper arm receptacle and the wind deflector surface enclose a wiper arm angle of 0°. The opening direction 58 of the wiper arm receptacle is arranged parallel to the wind deflector surface. The wiper arm receptacle is an opening for a receptacle channel, into which the wiper arm can be introduced. The receptacle channel extends as parallel as possible to the direction of the wiper arm. In the embodiment, the wiper arm adapter unit has a fixing device (not shown) which is provided for releasably coupling the wiper arm to the wiper arm adapter unit.

[0037] In the exemplary embodiment, the front tangent line 60 and the support axis at the front point 40 enclose a front angle 62 of 50°. The rear tangent line 64 and the support axis at the rear point 44 enclose a rear angle 66 of 55°. Figure 3 An alternative embodiment is shown in FIG. 1 , in which the rear angle 66 is 10°.

[0038] In the exemplary embodiment, the central tangent line 68 and the bearing axis at the central point 70 enclose a central angle 72 of 45°.

[0039] exist Figure 3 The alternative embodiment shown in FIG. 7 has an air guide surface 74 which is arranged on the edge of the wind deflector surface facing away from the wind. The air guide surface and the bearing axis enclose an air guide angle 76 of −30°. The air guide surface has a height offset 78 of 3 mm relative to the wind deflector surface. The height offset 78 is measured along the surface normal 80 of the base surface 82 of the wiper arm adapter. Figure 3 In the embodiment shown, the wiper arm adapter base surface 82 corresponds to the bottom side 50 .

[0040] exist Figure 4 , a further variant of the embodiment is shown in which the wind deflector surface with its edge 42 facing away from the wind protrudes by a protrusion 84 of 3 mm in the direction of wind flow.

[0041] In the adapter unit 12 Figure 5 In the variant shown, the wiper blade adapter unit 22 has an air guiding surface 74 . The wind deflector surface is movable relative to the air guiding surface, in particular is tiltable about the bearing axis 32 .

[0042] The wiper arm receptacle 56 can be arranged at different positions on the wiper arm adapter unit 20 relative to the wind deflector surface 28. Figure 6 2 shows possible positions of wiper arm receptacles. A first wiper arm receptacle 56a is arranged at the front point 40. A second wiper arm receptacle 56b is arranged at the center point 70. A third wiper arm receptacle 56c is arranged at the rear point 44.

[0043] In an advantageous embodiment, the wind deflector surface 28 has a modified or special surface structure. The surface can be roughened at least in places and / or have a shark skin structure and / or a golf ball structure. Such a surface structure influences the air flow flowing over it. In this way, the aerodynamic properties of the wind deflector surface can be improved. In particular, it is possible to precisely adjust the pressure acting via the wind deflector surface by selecting the type and arrangement of the modified surface structure.

Claims

1. A wiper arm adapter unit, which is configured to be coupled to a wiper arm, has a windshield surface configured to block air flowing through and to press a wiper blade against a vehicle window, and has a wiper blade adapter unit receptacle, characterized in that: The wiper blade adapter unit receptacle is provided for accommodating the wiper blade adapter unit so as to be pivotable about a bearing axis arranged parallel to an arranged wiping direction, wherein the wiper blade adapter unit is provided for accommodating a wiper blade, wherein the wind deflector surface and the bearing axis enclose a main angle between 25° and 65°, wherein the wiper arm adapter unit comprises an air guide surface which is arranged on an edge of the wind deflector surface facing away from the wind and encloses an air guide angle between -25° and -65° with the bearing axis, wherein the air guide surface has a height offset relative to the wind deflector surface of between 1 mm and 6 mm, wherein the height offset extends along a surface normal to a base surface of the wiper arm adapter.

2. The wiper arm adapter unit according to claim 1, characterized in that The wiper arm adapter unit is provided for detachable coupling to a wiper arm.

3. The wiper arm adapter unit according to claim 1, characterized in that The wind deflector surface and the bearing axis enclose a main angle of between 40° and 50°.

4. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The wind deflector surface is at least partially concave in the direction of the bearing axis.

5. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The wind deflector surface is at least partially convex in the direction of the bearing axis.

6. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The wiper arm adapter unit has a rear axis, which is arranged on the side of the wiper arm adapter unit facing away from the wind and on the side of the wiper arm adapter unit facing away from the windshield surface and is arranged as parallel as possible to the wiper arm direction, and the windshield surface has a vertical minimum distance of between 0.8 cm and 2.0 cm with respect to the rear axis, and the windshield surface has a vertical maximum distance of between 1.5 cm and 3.0 cm with respect to the rear axis.

7. The wiper arm adapter unit according to claim 6, characterized in that The wind deflector surface has a vertical minimum distance relative to the rear axis of between 1.0 cm and 1.5 cm.

8. The wiper arm adapter unit according to claim 6, characterized in that The wind deflector surface has a vertical maximum distance relative to the rear axis of between 2.0 cm and 2.5 cm.

9. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The wiper arm adapter unit comprises a wiper arm receptacle which, with the wind deflector surface, encloses a wiper arm angle of between −15° and 15°.

10. The wiper arm adapter unit according to claim 9, characterized in that The wiper arm receptacle and the wind deflector surface enclose a wiper arm angle between −5° and 5°.

11. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that A front tangent at a front point of the wind deflector surface, which is located on the windward edge of the wind deflector surface and is arranged in a plane perpendicular to the direction of the wiper arm, and the bearing axis enclose a front angle of between 30° and 70°.

12. The wiper arm adapter unit according to claim 11, characterized in that The front tangent at the front point of the wind deflector surface and the bearing axis enclose a front angle of between 45° and 55°.

13. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that A rear tangent at a rear point on the wind deflector surface and the bearing axis enclose a rear angle of between 10° and 60°, wherein the rear point is located on the edge of the wind deflector surface facing away from the wind and the rear tangent is arranged in a plane perpendicular to the direction of the wiper arm.

14. The wiper arm adapter unit according to claim 13, characterized in that The rear tangent at the rear point on the wind deflector surface and the bearing axis enclose a rear angle of between 25° and 35°.

15. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that A center tangent at a center point on the wind deflector surface and the bearing axis enclose an angle between 25° and 65°, wherein the center point is located in the middle between the edge of the wind deflector surface facing away from the wind and the edge facing the wind, and the center tangent is arranged in a plane perpendicular to the direction of the wiper arm.

16. The wiper arm adapter unit according to claim 15, characterized in that The central tangent at a central point on the wind deflector surface and the bearing axis enclose a central angle of between 40° and 50°.

17. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The air guiding surface and the bearing axis enclose an air guiding angle between −40° and −50°.

18. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The air guide surface has a height offset relative to the wind deflector surface of between 2 mm and 5 mm.

19. The wiper arm adapter unit according to claim 18, characterized in that The air guide surface has a height offset relative to the wind deflector surface of between 3 mm and 4 mm.

20. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The wind deflector surface projects with its edge facing away from the wind beyond the wiper arm adapter base surface by at least 1 mm in the wind flow direction.

21. The wiper arm adapter unit according to claim 20, characterized in that The wind deflector surface projects with its edge facing away from the wind by at least 2 mm in the wind flow direction beyond the wiper arm adapter base surface.

22. The wiper arm adapter unit according to claim 20, characterized in that The wind deflector surface projects with its edge facing away from the wind beyond the wiper arm adapter base surface by at least 5 mm in the wind flow direction.

23. The wiper arm adapter unit according to any one of claims 1 to 3, characterized in that The wiper arm adapter unit comprises a wiper arm receptacle which is designed to receive a wiper rod of a wiper arm.

24. Adapter unit comprising a wiper arm adapter unit according to any one of the preceding claims and a wiper blade adapter unit which is provided for accommodating a wiper blade.

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