Abstract:
The invention relates to a wiping device, in particular a wiping device for a motor vehicle pane, comprising a spring element (16 a -16 g ), a retaining unit (10 a -10 g ) that has a retaining element (12 a -12 g ) with a longitudinal guide channel (14 a -14 g ) for guiding the spring element (16 a -16 g ), and comprising a spoiler unit (22 a -22 g ). According to the invention, the spoiler unit (22 a -22 g ) has at least one supporting rib (72 a -72 g,  74 a  -74 g ) that extends from an inner contour of the spoiler (22 a -22 g ) in the form of a projection and that is provided in order to transmit the downforces that occur from the spoiler (22 a -22 g ) to the retaining unit (10 a -10 g ).

Description:
BACKGROUND OF THE INVENTION 
       [0001]    A wiper device, particularly a motor vehicle windscreen wiper device, having a spring element and a retaining unit, which retaining unit comprises a retaining element with a longitudinal guide channel for guiding the spring element, and having a wind deflector unit is already known in the art. 
       SUMMARY OF THE INVENTION 
       [0002]    The invention is based on a wiper device, particularly a motor vehicle windscreen wiper device, having a spring element and a retaining unit, which retaining unit comprises a retaining element with a longitudinal guide channel for guiding the spring element, and having a wind deflector unit. 
         [0003]    It is proposed that the wind deflector unit comprises at least one supporting web, which is provided to transfer contact pressing forces which occur from the wind deflector unit onto the retaining unit, as a result of which the wiper device can be configured in a particularly torsion-resistant manner with a low weight. A “spring element” in this context should be particularly understood to mean a resilient element which has at least one extension, said extension being elastically variable in a normal operating state by at least 10%, particularly by at least 20%, preferably by at least 30% and particularly advantageously by at least 50%, and which particularly generates a counterforce which depends on a change in the extension and is preferably proportional to the change and which counteracts said change. A “retaining unit” in this context should be particularly understood to mean a unit which is provided to connect the wind deflector unit to a wiper strip. A “retaining element” in this context should be particularly understood to mean an element which is provided to connect a wind deflector unit, a spring element and a wiper strip in a form-fitting manner. A “longitudinal guide channel” in this context should be particularly understood to mean a guide channel which extends parallel to a longitudinal direction of the retaining unit. The longitudinal guide channel preferably includes a free space and at least one channel wall delimiting the free space. A “longitudinal direction” in this context should be particularly understood to mean a direction which extends substantially parallel to a longitudinal extension of the retaining element. A “longitudinal extension” in this context should be particularly understood to mean a largest possible extension. “Substantially” in this context should be particularly understood to mean a deviation of less than 10°, preferably less than 5°. An “extension” of an element in this context should be particularly understood to mean a maximum distance between two points on a perpendicular projection of the element on a plane. A “supporting web” in this context should be particularly understood to mean a web which divides a longitudinal channel disposed between the longitudinal guide channel and wind deflector unit into two longitudinal channels and therefore abuts a longitudinal channel on both sides. A “wind deflector unit” in this context should be particularly understood to mean a unit which is provided to deflect a headwind acting on the wiper device and/or to use it to press a wiper strip against a vehicle pane. A “wiper strip” in this context should be particularly understood to mean a strip which is provided to wipe a vehicle windscreen. The wiper strip is preferably made of a rubber material. “Provided” should be particularly understood to mean specially designed and/or equipped. The wind deflector unit preferably comprises at least one concave outer surface. 
         [0004]    In a further embodiment it is proposed that the at least one supporting web bears against the retaining element with one free end, as a result of which contact pressing forces which occur can be transferred particularly evenly to the retaining element. 
         [0005]    If the at least one supporting web bears against the spring element with one free end, the wiper device can be designed with a particularly low construction height. 
         [0006]    It is proposed that the wind deflector unit is produced using a coextrusion process, by virtue of which the wind deflector unit can be produced in a particularly strong and at the same time cost-effective manner. A “coextrusion process” in this context should be particularly understood to mean the combining of at least two plastic melts of different kinds before they leave a profile nozzle. 
         [0007]    In addition, it is proposed that the wind deflector unit comprises two wind deflector subcomponents of different hardnesses, as a result of which the weight can be advantageously reduced and strength increased. 
         [0008]    Furthermore, it is proposed that the harder wind deflector subcomponent closes the wind deflector unit laterally, as a result of which the softer wind deflector subcomponent can be advantageously protected from damage. “Laterally” within this context should be particularly understood to mean viewed in a wiping direction. “To close” in this context should be particularly understood to mean to cover, surround and/or conceal. 
         [0009]    In a further embodiment of the invention, it is proposed that the softer partial wind deflector subcomponent comprises a longitudinal channel which includes a triangular cross-section, as a result of which savings can advantageously be made in terms of material and weight. “Triangular” in this context should be understood to mean a contour which has three corners. The corners may also be rounded, depending on the particular application. 
         [0010]    If the softer wind deflector subcomponent and the harder wind deflector subcomponent are connected to one another in a substance-bonded and planar manner on a plane running parallel to a wiping direction, a particularly stable connection can be achieved between the wind deflector subcomponents. A “wiping direction” in this context should be particularly understood to mean a direction which extends parallel to a surface to be wiped and/or perpendicular to a main orientation of the wiper strip. 
         [0011]    It is further proposed that the wiper device comprises a retaining unit which has a retaining element having a longitudinal channel for guiding a spring element, wherein the retaining element has at least one fastening element which is provided to link the wind deflector unit in a form-fitting manner in a mounted state, as a result of which a particularly secure assembly of the wind deflector unit can be achieved. A “fastening element” in this context should be particularly understood to mean an element which is provided to create a form fit with a corresponding component. “To link” in this context should be particularly understood to mean to connect and/or attach. 
         [0012]    In a main flow region of the wiper device, joints and therefore flow resistance and/or noise can be avoided if the wind deflector unit bears against the retaining element at least partially laterally in the region of the longitudinal guide channel. “Laterally” in this context should be particularly understood to mean coming from a wiping direction. 
         [0013]    It is further proposed that the retaining element comprises at least one fastening means which faces the longitudinal channel with one free end and is provided to create a form fit with the wind deflector unit, as a result of which the wiper device can be designed in a particularly stable manner. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    Further advantages emerge from the following drawing description. Seven exemplary embodiments of the invention are depicted in the drawing. The drawings, description and claims contain a plurality of combined features. The person skilled in the art will advantageously observe the features individually too and bring them together to create further appropriate combinations. 
           [0015]    In the drawings: 
           [0016]      FIG. 1  shows a sectional view of a wiper device with a retaining unit, 
           [0017]      FIG. 2  shows a sectional view of a further exemplary embodiment of a wiper device with a retaining unit, 
           [0018]      FIG. 3  shows a sectional view of a further exemplary embodiment of a wiper device with a retaining unit, 
           [0019]      FIG. 4  shows a sectional view of a further exemplary embodiment of a wiper device with a retaining unit, 
           [0020]      FIG. 5  shows a sectional view of a further exemplary embodiment of a wiper device with a retaining unit, 
           [0021]      FIG. 6  shows a sectional view of a further exemplary embodiment of a wiper device with a retaining unit, 
           [0022]      FIG. 7  shows a sectional view of a further exemplary embodiment of a wiper device with a retaining unit. 
       
    
    
     DETAILED DESCRIPTION 
       [0023]      FIG. 1  shows a wiper device according to the invention having a retaining unit  10   a  with a retaining element  12   a  which has a longitudinal guide channel  14   a  for guiding a spring element  16   a,  as a sectional view. The sectional plane extends perpendicularly to a longitudinal direction of the retaining element  12   a.    
         [0024]    The retaining element  12   a  comprises two fastening elements  18   a,    20   a.  The fastening elements  18   a,    20   a  are formed integrally with the retaining element  12   a.  The fastening elements  18   a,    20   a  point at their free ends  24   a,    26   a  in directions facing away from one another, which extend parallel to a wiping direction  88   a.  In addition, the fastening elements  18   a,    20   a  extend in an L-shape from channel walls  36   a,    38   a  which abut the longitudinal guide channel  14   a.  A space between the free ends  24   a,    26   a  is greater than a width of the longitudinal guide channel  14   a.  The fastening elements  18   a,    20   a  are provided to link a wind deflector unit  22   a  in a mounted state in a form-fitting manner. The free ends  24   a,    26   a  of the fastening elements  18   a,    20   a  are surrounded by the wind deflector unit  22   a  for this purpose. The wind deflector unit  22   a  comprises two L-shaped fastening means  44   a,    46   a  and also supporting bodies  48   a,    50   a  abutting the fastening means  44   a ,  46   a.    
         [0025]    To guide the spring element  16   a,  side walls  52   a,    54   a  of the longitudinal guide channel  14   a  bear against the channel walls  36   a,    38   a.  The channel walls  36   a,    38   a  thereby enclose a right angle with the side walls  52   a,    54   a.  In addition, a partition wall  56   a  is arranged at the side walls  52   a,    54   a,  which closes the longitudinal guide channel  14   a  in the direction of a wiper strip  40   a . The side walls  52   a,    54   a  extend from the partition wall  56   a  in a direction facing away from the wiper strip  40   a.  The retaining element  12   a  has a longitudinal opening  84   a,  which opens the longitudinal guide channel  14   a  towards the wind deflector unit  22   a.    
         [0026]    Two L-shaped guide profiles  58   a,    60   a  of the retaining unit  10   a  are arranged on the partition wall  56   a.  The guide profiles  58   a,    60   a  are formed integrally with the retaining element  12   a.  The guide profiles  58   a,    60   a  each have a lateral guide  62   a,    64   a  and a vertical guide  66   a,    68   a . The vertical guides  66   a,    68   a  each enclose an angle of 90° with the lateral guides  62   a,    64   a.  The vertical guides  66   a,    68   a  point to one another in this case. The lateral guides  62   a,    64   a  each enclose an angle of 90° relative to the partition wall  56   a.  The guide profiles  58   a,    60   a  point at their free ends of the vertical guides  66   a,    68   a  in directions facing one another. The guide profiles  58   a,    60   a  and the partition wall  56   a  form a welt track  70   a,  into which the wiper strip  40   a  is inserted. 
         [0027]    The retaining element  12   a  is produced integrally from polyethylene by an extrusion process. A person skilled in the art will consider different plastics which seem appropriate in this context, such as polypropylene, polyamide, polyvinyl chloride and/or polystyrene in particular. 
         [0028]    The wind deflector unit  22   a  is produced from two wind deflector subcomponents  32   a ,  34   a  of different hardnesses using a coextrusion process. The first wind deflector subcomponent  32   a  comprises two outwardly concave wind deflector sides  76   a,    78   a.  To reinforce the wind deflector unit  22   a,  the first wind deflector subcomponent  32   a  has a connecting web  80   a,  which connects the concave wind deflector sides  76   a,    78   a  to one another. The connecting web  80   a  and the wind deflector sides  76   a,    78   a  enclose a longitudinal channel  82   a  which includes a triangular cross-section. 
         [0029]    The first wind deflector subcomponent  32   a  is configured integrally with the second wind deflector subcomponent  34   a  and is provided to deflect headwind. The second wind deflector subcomponent  34   a  exhibits a greater strength and hardness than the first wind deflector subcomponent  32   a.  The L-shaped fastening means  44   a,    46   a  and also the supporting bodies  48   a ,  50   a  abutting the fastening means  44   a,    46   a  are integrally formed on the second wind deflector subcomponent  34   a.  The harder wind deflector subcomponent  34   a  surrounds the fastening elements  18   a,    20   a  and thereby closes the retaining unit  10   a  laterally. 
         [0030]    The second wind deflector subcomponent  34   a  further exhibits two supporting webs  72   a,    74   a.  The supporting webs  72   a,    74   a  bear against the fastening elements  18   a,    20   a  of the retaining element  12   a  with their free ends on a side facing away from the wiper strip  40   a.  The supporting webs  72   a,    74   a  are provided for the transfer of contact pressing forces which arise at the wind deflector unit  22   a  when a headwind is encountered. The supporting webs  72   a,    74   a  extend over the entire length of the wind deflector unit  22   a.    
         [0031]    The spring element  16   a  is inserted into the longitudinal guide channel  14   a.  The spring element  16   a  is produced from spring steel and provided to form the retaining unit  10   a  in an elastically deflecting manner. 
         [0032]    For assembly, the spring element  16   a  is initially introduced into the longitudinal guide channel  14   a.  The wiper strip  40   a  is then inserted into the welt track  70   a  and creates a form fit with the retaining element  12   a.  The wind deflector unit  22   a  is pushed via the fastening elements  18   a,    20   a  and is then connected thereto in a form-fitting manner. 
         [0033]    Six further exemplary embodiments of the invention are shown in  FIGS. 2 to 7 . The following descriptions are essentially limited to the differences between the exemplary embodiments, wherein reference can be made to the description of the first exemplary embodiment in relation to those components, features and functions which remain the same. To distinguish between the exemplary embodiments, the letter a in the reference numbers of the exemplary embodiment in  FIG. 1  is replaced by the letters b to g in the reference numbers of the exemplary embodiments in  FIGS. 2 to 7 . In relation to those components which remain the same, particularly in relation to components with the same reference numbers, reference can be made in principle to the drawings and/or the description of the exemplary embodiment. 
         [0034]      FIG. 2  shows a further exemplary embodiment of a wiper device according to the invention having a retaining unit  10   b  with a retaining element  12   b  which has a longitudinal guiding channel  14   b  for guiding a spring element  16   b,  as well as a wind deflector unit  22   b,  as a sectional view. The sectional plane extends perpendicularly to a longitudinal direction of the retaining element  12   b.    
         [0035]    The retaining unit  10   b  comprises channel walls  36   b,    38   b  which are configured integrally with the retaining element  12   b.  The channel walls  36   b,    38   b  abut the longitudinal guide channel  14   b  on a side facing away from the wiper strip. On the channel walls  36   b,    38   b,  two longitudinal prolongations  90   b,    92   b  are arranged on each side facing away from the wiper strip. The wind deflector unit  22   b  exhibits two L-shaped fastening means  44   b,    46   b  and also supporting bodies  48   b,    50   b  abutting the fastening means  44   b,    46   b.    
         [0036]    To guide the spring element  16   b,  side walls  52   b,    54   b  of the longitudinal guide channel  14   b  bear against the channel walls  36   b,    38   b.  The channel walls  36   b,    38   b  thereby enclose a right angle with the side walls  52   b,    54   b.  In addition, a partition wall  56   b  is arranged at the side walls  52   b,    54   b,  which closes the longitudinal guide channel  14   b  in the direction of a wiper strip  40   b.  The side walls  52   b,    54   b  extend from the partition wall  56   b  in a direction facing away from the wiper strip  40   b.  The retaining element  12   b  has a longitudinal opening  84   b,  which opens the longitudinal guide channel  14   b  towards the wind deflector unit  22   b.    
         [0037]    Two L-shaped guide profiles  58   b,    60   b  of the retaining unit  10   b  are arranged on the partition wall  56   b.  The guide profiles  58   b,    60   b  are formed integrally with the retaining element  12   b.  The guide profiles  58   b,    60   b  each have a lateral guide  62   b,    64   b  and a vertical guide  66   b ,  68   b.  The vertical guides  66   b,    68   b  each enclose an angle of 90° with the lateral guides  62   b,    64   b . The vertical guides  66   b,    68   b  in this case point towards one another. The lateral guides  62   b,    64   b  each enclose an angle of 90° to the partition wall  56   b.  The guide profiles  58   b,    60   b  point at their free ends of the vertical guides  66   b,    68   b  in directions facing one another. The guide profiles  58   b ,  60   b  and the partition wall  56   b  form a welt track  70   b  into which the wiper strip  40   b  is inserted. 
         [0038]    The retaining element  12   b  is integrally produced from polyethylene by an extrusion process. A person skilled in the art will consider different plastics which seem appropriate in this context, such as polypropylene, polyamide, polyvinyl chloride and/or polystyrene in particular. 
         [0039]    The wind deflector unit  22   b  is produced from two wind deflector subcomponents  32   b,    34   b,    42   b  of different hardnesses. The first wind deflector subcomponent  32   b  comprises two wind deflector sides  76   b,    78   b  configured in an outwardly concave manner. To strengthen the wind deflector unit  22   b,  the first wind deflector subcomponent  32   b  has a connecting web  80   b , which connects the concave wind deflector sides  76   b,    78   b  to one another. The connecting web  80   b  and the wind deflector sides  76   b,    78   b  enclose a longitudinal channel  82   b  which includes a triangular cross-section. 
         [0040]    The first wind deflector subcomponent  32   b  is configured integrally with the second wind deflector subcomponent  34   b,    42   b  and provided to deflect headwind. The second wind deflector subcomponent  34   b,    42   b  has a greater strength and hardness than the first wind deflector subcomponent  32   b.  The L-shaped fastening means  44   b,    46   b  and also the supporting bodies  48   b ,  50   b  abutting the fastening means  44   b,    46   b  are integrally formed on the second wind deflector subcomponent  34   b,    42   b.  The harder wind deflector subcomponent  34   b,    42   b  surrounds the retaining element  12   b  in the region of the longitudinal guide channel  14   b.    
         [0041]    The second wind deflector subcomponent  34   b,    42   b  also has two supporting webs  72   b ,  74   b.  The supporting webs  72   b,    74   b  bear against the channel walls  36   b,    38   b  with their free ends on a side facing away from the wiper strip  40   b.  The supporting webs  72   b,    74   b  are provided to transfer contact pressing forces which arise at the wind deflector unit  22   b  when a headwind is encountered. The supporting webs  72   b,    74   b  extend over the entire length of the wind deflector unit  22   b.  The longitudinal prolongations  90   b,    92   b  each partially surround the supporting webs  72   b,    74   b  in a wiping direction  88   b.    
         [0042]    The spring element  16   b  is inserted into the longitudinal guide channel  14   b.  The spring element  16   b  is produced from spring steel and provided to form the retaining unit  10   b  in an elastically deflecting manner. 
         [0043]    For assembly, the spring element  16   b  is initially introduced into the longitudinal guide channel  14   b.  The wiper strip  40   b  is then inserted into the welt track  70   b  and creates a form fit with the retaining element  12   b.  The wind deflector unit  22   b  is pushed via the retaining elements  12   b  and is then connected thereto in a form-fitting manner. 
         [0044]      FIG. 3  shows a further exemplary embodiment of a wiper device according to the invention having a retaining unit  10   c  with a retaining element  12   c  which has a longitudinal guide channel  14   c  for guiding a spring element  16   c,  as a sectional view. The sectional plane extends perpendicularly to a longitudinal direction of the retaining element  12   c.  The wiper device shown substantially corresponds to the exemplary embodiment shown in  FIG. 2 . 
         [0045]    A side strip  28   c,    30   c  is integrally formed on the retaining element  12   c  in the region of the longitudinal guide channel  14   c  on each side pointing in one wiping direction  88   c.  The side strips  28   c,    30   c  create a form fit with a wind deflector unit  22   c  in the mounted state. The form fit prevents the wind deflector unit  22   c  from moving in a vertical direction  86   c  relative to the retaining element  12   c.  The vertical direction  86   c  extends perpendicularly to the longitudinal direction and perpendicularly to the wiping direction  88   c.    
         [0046]      FIG. 4  shows a further exemplary embodiment of a wiper device according to the invention having a retaining unit  10   d  with a retaining element  12   d  which has a longitudinal guide channel  14   d  for guiding a spring element  16   d,  as a sectional view. The sectional plane extends perpendicularly to a longitudinal direction of the retaining element  12   d.  The wiper device shown substantially corresponds to the exemplary embodiment shown in  FIG. 3 . 
         [0047]    The retaining unit  10   d  has channel walls  36   d,    38   d  which are configured integrally with the retaining element  12   d.  The channel walls  36   d,    38   d  abut the longitudinal guide channel  14   d  on a side facing away from the wiper strip. One longitudinal prolongation  90   d,    92   d  is arranged on each of the channel walls  36   d,    38   d  on a side facing away from the wiper strip. 
         [0048]    A side strip  28   d,    30   d  is integrally formed on the retaining element  12   d  in the region of the longitudinal guide channel  14   d  on each side pointing in one wiping direction  88   d.  The side strips  28   d,    30   d  create a form fit with a wind deflector unit  22   d  in the mounted state. The form fit prevents the wind deflector unit  22   d  from moving in a vertical direction  86   d  relative to the retaining element  12   d.  The vertical direction  86   d  extends perpendicularly to the longitudinal direction and perpendicularly to the wiping direction  88   d.    
         [0049]    The wind deflector unit  22   d  is produced using a coextrusion process from two wind deflector subcomponents  32   d,    34   d,    42   d  with different hardnesses. The first wind deflector subcomponent  32   d  has two wind deflector sides  76   d,    78   d  configured in an outwardly concave manner. To strengthen the wind deflector unit  22   d,  the first wind deflector subcomponent  32   d  has a connecting web  80   d  which connects the concave wind deflector sides  76   d,    78   d  to one another. The connecting web  80   d  and the wind deflector sides  76   d,    78   d  enclose a longitudinal channel  82   d  which includes a triangular cross-section. 
         [0050]    The first wind deflector subcomponent  32   d  is integrally configured with the second wind deflector subcomponent  34   d,    42   d  and is provided to deflect headwind. The second wind deflector subcomponent  34   d,    42   d  exhibits a greater strength and hardness than the first wind deflector subcomponent  32   d.  L-shaped fastening means  44   d,    46   d  are integrally formed on the second wind deflector subcomponent  34   d,    42   d  and also on supporting bodies  48   d,    50   d  abutting the fastening means  44   d,    46   d.  The harder wind deflector subcomponent  34   d,    42   d  surrounds the retaining element  12   d  in the region of the longitudinal guide channel  14   d.    
         [0051]    The second wind deflector subcomponent  34   d,    42   d  also has two supporting webs  72   d ,  74   d.  The supporting webs  72   d,    74   d  bear against the spring element  16   d  at their free ends on a side facing away from the wiper strip  40   d.  The supporting webs  72   d,    74   d  are provided to transfer contact pressing forces to the spring element  16   d  which occur at the wind deflector unit  22   d  when a headwind is encountered. The supporting webs  72   d,    74   d  extend over the entire length of the wind deflector unit  22   d.  The longitudinal prolongations  90   d,    92   d  bear against the supporting webs  72   d,    74   d  partially in a wiping direction  88   d  in each case. 
         [0052]      FIG. 5  shows a further exemplary embodiment of a wiper device according to the invention having a retaining unit  10   e  with a retaining element  12   e  which has a longitudinal guide channel  14   e  for guiding a spring element  16   e,  as well as a wind deflector unit  22   e,  as a sectional view. The sectional plane extends perpendicularly to a longitudinal direction of the retaining element  12   e.    
         [0053]    The longitudinal guide channel  14   e  is trough-shaped in design. The longitudinal guide channel  14   e  is open over the entire width and length in the direction of the wind deflector unit  22   e.    
         [0054]    To guide the spring element  16   e,  the longitudinal guide channel  14   e  has side walls  52   e,    54   e.  In addition, a partition wall  56   e  is arranged at the side walls  52   e,    54   e,  which closes the longitudinal guide channel  14   e  in the direction of a wiper strip  40   e.  The side walls  52   e,    54   e  extend from the partition wall  56   e  in a direction facing away from the wiper strip  40   e.  The retaining element  12   e  has a longitudinal opening  84   e  which completely opens the longitudinal guide channel  14   e  towards the wind deflector unit  22   e.    
         [0055]    A side strip  28   e,    30   e  is integrally formed on the retaining element  12   e  in the region of the longitudinal guide channel  14   e  on each side pointing in one wiping direction  88   e.  The side strips  28   e,    30   e  create a form fit with a wind deflector unit  22   e  in the mounted state. The form fit prevents the wind deflector unit  22   e  from moving in a vertical direction  86   e  relative to the retaining element  12   e.  The vertical direction  86   e  extends perpendicularly to the longitudinal direction and perpendicularly to the wiping direction  88   e.    
         [0056]    Two L-shaped guide profiles  58   e,    60   e  of the retaining unit  10   e  are arranged on the partition wall  56   e.  The guide profiles  58   e,    60   e  are formed integrally with the retaining element  12   e.  The guide profiles  58   e,    60   e  each have a lateral guide  62   e,    64   e  and a vertical guide  66   e,    68   e . The vertical guides  66   e,    68   e  each enclose an angle of 90° with the lateral guides  62   e,    64   e.  The vertical guides  66   e,    68   e  point to one another in this case. The lateral guides  62   e,    64   e  each enclose an angle of 90° relative to the partition wall  56   e.  The guide profiles  58   e,    60   e  point at their free ends of the vertical guides  66   e,    68   e  in directions facing one another. The guide profiles  58   e,    60   e  and the partition wall  56   e  form a welt track  70   e,  into which the wiper strip  40   e  is inserted. 
         [0057]    The retaining element  12   e  is produced integrally from polyethylene by an extrusion process. A person skilled in the art will consider different plastics which seem appropriate in this context, such as polypropylene, polyamide, polyvinyl chloride and/or polystyrene in particular. 
         [0058]    The wind deflector unit  22   e  is produced from two wind deflector subcomponents  32   e ,  34   e,    42   e  of different hardnesses using a coextrusion process. The first wind deflector subcomponent  32   a  comprises two outwardly concave wind deflector sides  76   e,    78   e.  To reinforce the wind deflector unit  22   e,  the first wind deflector subcomponent  32   a  has a connecting web  80   e , which connects the concave wind deflector sides  76   e,    78   e  to one another. The connecting web  80   e  and the wind deflector sides  76   e,    78   e  enclose a longitudinal channel  82   e  which includes a triangular cross-section. 
         [0059]    The first wind deflector subcomponent  32   e  is configured integrally with the second wind deflector subcomponent  34   e,    42   e  and is provided to deflect headwind. The second wind deflector subcomponent  34   e,    42   e  exhibits a greater strength and hardness than the first wind deflector subcomponent  32   e.  The L-shaped fastening means  44   e,    46   e  and also the supporting bodies  48   e,    50   e  abutting the fastening means  44   e,    46   e  are integrally formed on the second wind deflector subcomponent  34   e,    42   e.  The harder wind deflector subcomponent  34   e,    42   e  surrounds the retaining element  12   e  in the region of the longitudinal guide channel  14   e.    
         [0060]    The second wind deflector subcomponent  34   e,    42   e  also has two supporting webs  72   e ,  74   e.  The supporting webs  72   e,    74   e  bear against the spring element  16   e  with their free ends on a side facing away from the wiper strip  40   e.  The supporting webs  72   e,    74   e  are provided for the transfer of contact pressing forces which arise at the wind deflector unit  22   e  when a headwind is encountered. The supporting webs  72   e,    74   e  extend over the entire length of the wind deflector unit  22   e.  The supporting webs  72   e,    74   e  prevent the spring element  16   e  from moving in the vertical direction  86   e.  The vertical direction  86   e  extends perpendicularly to the longitudinal direction and perpendicularly to the wiping direction  88   e.    
         [0061]    The spring element  16   e  is inserted into the longitudinal guide channel  14   e.  The spring element  16   e  is produced from spring steel and provided to form the retaining unit  10   e  in an elastically deflecting manner. 
         [0062]    For assembly, the spring element  16   e  is initially introduced into the longitudinal guide channel  14   e.  The wiper strip  40   e  is then inserted into the welt track  70   e  and creates a form fit with the retaining element  12   e.  The wind deflector unit  22   e  is pushed via the retaining element  12   e  and then connected thereto in a form-fitting manner. 
         [0063]      FIG. 6  shows a further exemplary embodiment of a wiper device according to the invention having a retaining unit  10   f  with a retaining element  12   f  which has a longitudinal guide channel  14   f  for guiding a spring element  16   f  and a wind deflector unit  22   f,  as a sectional view. The sectional plane extends perpendicularly to a longitudinal direction of the retaining element  12   f.    
         [0064]    The longitudinal guide channel  14   f  is trough-shaped in design. The longitudinal guide channel  14   f  is opened in the direction of the wind deflector unit  22   f  over the entire width and length. 
         [0065]    The longitudinal guide channel  14   f  has side walls  52   f,    54   f  to guide the spring element  16   f.  In addition, a partition wall  56   f  is arranged at the side walls  52   f,    54   f,  which closes the longitudinal guide channel  14   f  in the direction of a wiper strip  40   f.  The side walls  52   f,    54   f  extend from the partition wall  56   f  in a direction facing away from the wiper strip  40   f.  The retaining element  12   f  has a longitudinal opening  84   f,  which completely opens the longitudinal guide channel  14   f  to the wind deflector unit  22   f.    
         [0066]    Two L-shaped guide profiles  58   f,    60   f  of the retaining unit  10   f  are arranged on the partition wall  56   f.  The guide profiles  58   f,    60   f  are formed integrally with the retaining element  12   f.  The guide profiles  58   f,    60   f  each have a lateral guide  62   f,    64   f  and a vertical guide  66   f,    68   f . The vertical guides  66   f,    68   f  each enclose an angle of 90° with the lateral guides  62   f,    64   f.  The vertical guides  66   f,    68   f  point to one another in this case. The lateral guides  62   f,    64   f  each enclose an angle of 90° relative to the partition wall  56   f.  The guide profiles  58   f,    60   f  point at their free ends of the vertical guides  66   f,    68   f  in directions facing one another. The guide profiles  58   f,    60   f  and the partition wall  56   f  form a welt track  70   f,  into which the wiper strip  40   f  is inserted. 
         [0067]    The retaining element  12   f  is produced integrally from polyethylene by an extrusion process. A person skilled in the art will consider different plastics which seem appropriate in this context, such as polypropylene, polyamide, polyvinyl chloride and/or polystyrene in particular. 
         [0068]    The wind deflector unit  22   f  is produced from two wind deflector subcomponents  32   f ,  34   f,    42   f  of different hardnesses using a coextrusion process. The first wind deflector subcomponent  32   f  comprises two outwardly concave wind deflector sides  76   f,    78   f.  To reinforce the wind deflector unit  22   f,  the first wind deflector subcomponent  32   f  has a connecting web  80   f , which connects the concave wind deflector sides  76   f,    78   f  to one another. The connecting web  80   f  and the wind deflector sides  76   f,    78   f  enclose a longitudinal channel  82   f,  which includes a triangular cross-section. 
         [0069]    The first wind deflector subcomponent  32   f  is configured integrally with the second wind deflector subcomponent  34   f,    42   f  and is provided to deflect headwind. The second wind deflector subcomponent  34   f,    42   f  exhibits a greater strength and hardness than the first wind deflector subcomponent  32   f.  L-shaped fastening means  44   f,    46   f  are integrally formed on the second wind deflector subcomponent  34   f,    42   f.  The harder wind deflector subcomponent  34   f,    42   f  surrounds the retaining element  12   f  in the region of the longitudinal guide channel  14   f.    
         [0070]    The second wind deflector subcomponent  34   f,    42   f  also has two supporting webs  72   f ,  74   f.  The supporting webs  72   f,    74   f  bear against the spring element  16   f  with their free ends on a side facing away from the wiper strip  40   f.  The supporting webs  72   f,    74   f  are provided for the transfer of contact pressing forces which arise at the wind deflector unit  22   f  when a headwind is encountered. The supporting webs  72   f,    74   f  extend over the entire length of the wind deflector unit  22   f.  The supporting webs  72   f,    74   f  prevent the spring element  16   f  from moving in a vertical direction  86   f.  The vertical direction  86   f  extends perpendicularly to the longitudinal direction and perpendicularly to a wiping direction  88   f.    
         [0071]    The spring element  16   f  is inserted into the longitudinal guide channel  14   f.  The spring element  16   f  is produced from spring steel and provided to form the retaining unit  10   f  in an elastically deflecting manner. 
         [0072]    For assembly, the spring element  16   f  is initially introduced into the longitudinal guide channel  14   f.  The wiper strip  40   f  is then inserted into the welt track  70   f  and creates a form fit with the retaining element  12   f.  The wind deflector unit  22   f  is pushed via the retaining element  12   f  and is then connected thereto in a form-fitting manner. 
         [0073]      FIG. 7  shows a further exemplary embodiment of a wiper device according to the invention having a retaining unit  10   g  with a retaining element  12   g  which has a longitudinal guide channel  14   g  for guiding a spring element  16   g,  as well as a wind deflector unit  22   g,  as a sectional view. The sectional plane runs perpendicularly to a longitudinal direction of the retaining element  12   g.    
         [0074]    The longitudinal guide channel  14   g  is trough-shaped in design. The longitudinal guide channel  14   g  is open over the entire width and length in the direction of the wind deflector unit  22   g.    
         [0075]    To guide the spring element  16   g,  the longitudinal guide channel  14   g  has side walls  52   g,    54   g.  In addition, a partition wall  56   g  is arranged at the side walls  52   g,    54   g,  which closes the longitudinal guide channel  14   g  in the direction of a wiper strip  40   g.  The side walls  52   g,    54   g  extend from the partition wall  56   g  in a direction facing away from the wiper strip  40   g.  The retaining element  12   g  has a longitudinal opening  84   g,  which opens the longitudinal guide channel  14   g  towards the wind deflector unit  22   g.    
         [0076]    Two L-shaped guide profiles  58   g,    60   g  of the retaining element  10   g  are arranged on the partition wall  56   g.  The guide profiles  58   g,    60   g  are formed integrally with the retaining element  12   g.  The guide profiles  58   g,    60   g  each have a lateral guide  62   g,    64   g  and a vertical guide  66   g,    68   g.  The vertical guides  66   g,    68   g  each enclose an angle of 90° with the lateral guides  62   g ,  64   g.  The vertical guides  66   g,    68   g  point to one another in this case. The lateral guides  62   g,    64   g  each enclose an angle of 90° relative to the partition wall  56   g.  The guide profiles  58   g,    60   g  point at their free ends of the vertical guides  66   g,    68   g  in directions facing one another. The guide profiles  58   g,    60   g  and the partition wall  56   g  form a welt track  70   g,  into which the wiper strip  40   g  is inserted. 
         [0077]    The wind deflector unit  22   g  is produced from two wind deflector subcomponents  32   g,    34   g  of different hardnesses using a coextrusion process. The first wind deflector subcomponent  32   g  comprises two outwardly concave wind deflector sides  76   g,    78   g.  To reinforce the wind deflector unit  22   g,  the first wind deflector subcomponent  32   g  has a connecting web  80   g,  which connects the concave wind deflector sides  76   g,    78   g  to one another. The connecting web  80   g  and the wind deflector sides  76   g,    78   g  enclose a longitudinal channel  82   g  which includes a triangular cross-section. 
         [0078]    The first wind deflector subcomponent  32   g  is configured integrally with the second wind deflector subcomponent  34   g  and is provided to deflect headwind. The second wind deflector subcomponent  34   g  exhibits a greater strength and hardness than the first wind deflector subcomponent  32   g.  The second wind deflector subcomponent  34   g  is integrally formed with the retaining element  12   g  and produced from a plastic. A person skilled in the art will consider different plastics which seem appropriate in this context, such as polypropylene, polyamide, polyvinyl chloride and/or polystyrene in particular. 
         [0079]    The second wind deflector subcomponent  34   g  further exhibits two supporting webs  72   g,    74   g.  The supporting webs  72   g,    74   g  bear against the spring element  16   g  with their free ends on a side facing away from the wiper strip  40   g.  The supporting webs  72   g,    74   g  are provided for the transfer of contact pressing forces which arise at the wind deflector unit  22   g  when a headwind is encountered. The supporting webs  72   g,    74   g  extend over the entire length of the wind deflector unit  22   g.  The supporting webs  72   g,    74   g  prevent the spring element  16   g  from moving in a vertical direction  86   g.  The vertical direction  86   g  extends perpendicularly to the longitudinal direction and perpendicularly to the wiping direction  88   g.    
         [0080]    The spring element  16   g  is inserted into the longitudinal guide channel  14   g.  The spring element  16   g  is produced from spring steel and provided to form the retaining unit  10   g  in an elastically deflecting manner. 
         [0081]    For assembly, the spring element  16   g  is introduced into the longitudinal guide channel  14   g.  The wiper strip  40   g  is then inserted into the welt track  70   g  and creates a form fit with the retaining element  12   g.