Abstract:
The invention relates to a wiping device, in particular a wiping device for a motor vehicle pane, having a retaining unit ( 10   a - 10   g ) with a retaining element ( 12   a - 12   g ), said retaining element ( 12   a - 12   g ) comprising a keder track ( 70   a - 70   g ) that is provided in order to interlockingly accommodate a wiper strip ( 40   a - 40   g ). According to the invention, at least one vertical wall ( 62   a - 62   g,    64   a - 64   g) of the keder track (   70   a - 70   g ) forms an acute angle ( 32   a - 32   g,    34   a - 34   g) with at least one horizontal wall (   66   a - 66   g,    68   a - 68   g ) of said track ( 70   a - 70   g ).

Description:
BACKGROUND OF THE INVENTION 
       [0001]    A wiping device is already known, in particular a wiping device for a motor vehicle pane, comprising a retaining unit which has a retaining element, wherein the retaining element comprises a keder track which is provided to receive a wiper strip positively. 
       SUMMARY OF THE INVENTION 
       [0002]    The invention is based on a wiping device, in particular a wiping device for a motor vehicle pane, comprising a retaining unit which has a retaining element, wherein the retaining element comprises a keder track which is provided to receive a wiper strip positively. 
         [0003]    It is proposed that at least one vertical wall of the keder track encloses an acute angle with at least one horizontal wall of the keder track, whereby the torsional rigidity of the retaining element is able to be advantageously increased. Preferably the angle is less than 85°. Particularly preferably, the angle is less than 80°. “Retaining unit” is intended to be understood here in this context, in particular, as a unit which is provided to connect a spoiler element to a wiper strip. “Retaining element” is intended to be understood here in this context, in particular, as an element which is provided to connect a spoiler element, a spring element and a wiper strip positively together. “Spring element” is intended to be understood in this context, in particular, as a spring elastic element which has at least one dimension which in a normal operating state is able to be resiliently altered by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50%, and which in particular produces a counter-force which is dependent on an alteration of the dimension and preferably proportional to the alteration, said counter-force counteracting the alteration. “Wiper strip” is intended to be understood in this context, in particular, as a strip which is provided to wipe a vehicle pane. Preferably, the wiper strip is formed from a rubber material. “Vertical wall” is intended to be understood in this context, in particular, as a wall which extends substantially perpendicular to a wiping direction. “Horizontal wall” is intended to be understood in this context, in particular, as a wall which extends at least substantially in a main dimensional component parallel to a wiping direction and/or to a surface to be wiped by the wiper strip. “At least substantially” is intended to be understood in this context, in particular, as a deviation of less than 45°, preferably less than 30°. “Provided” is intended to be understood as specifically designed and/or equipped. 
         [0004]    In a further embodiment of the invention it is proposed that the wiping device has an intermediate wall which adjoins a longitudinal guide channel of the retaining element and comprises at least one surface which extends parallel to at least one of the horizontal walls, whereby the torsional rigidity may be further increased. “Longitudinal guide channel” is intended to be understood in this context, in particular, as a guide channel which extends parallel to a longitudinal direction of the retaining unit. Preferably, the longitudinal guide channel comprises a free space as well as at least one channel wall defining the free space. “Longitudinal direction” is intended to be understood in this context, in particular, as a direction which extends substantially parallel to a longitudinal dimension of the retaining element. “Longitudinal dimension” is intended to be understood in this context, in particular, as the greatest possible dimension. “Substantially” is intended to be understood in this context, in particular, as a deviation of less than 10°, preferably less than 5°. A “dimension” of an element is intended to be understood in this context, in particular, as a maximum spacing between two points of a vertical projection of the element on a plane. 
         [0005]    The wiping device may be designed to be particularly stable if the intermediate wall has at least three surfaces, which enclose two obtuse angles relative to one another. 
         [0006]    It is also proposed that at least one of the three surfaces in an assembled state bears positively against the wiper strip, whereby a particularly large bearing surface for the wiper strip may be achieved, together with a compact construction of the retaining unit. 
         [0007]    If the retaining element has at least one fastening means, which with a free end faces a longitudinal guide channel of the retaining element and is provided to form a positive connection with a spoiler element, a particularly durable connection may be achieved between a spoiler element and the retaining unit. 
         [0008]    If a spoiler element is produced in an extrusion process, production costs may be advantageously saved. 
         [0009]    Joints in a main flow region of the spoiler element and/or noise and flow resistance may be avoided if the spoiler element at least partially bears laterally against the retaining element in the region of the longitudinal guide channel. 
         [0010]    In a further embodiment of the invention, it is proposed that the spoiler element comprises a longitudinal channel which has a triangular cross section, whereby the material and weight of the retaining element may be saved whilst providing a high degree of strength. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    Further advantages are revealed from the following description of the drawings. Seven exemplary embodiments of the invention are shown in the drawings. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and combine them to create further useful combinations. 
           [0012]    In the drawings: 
           [0013]      FIG. 1  shows a sectional view of a wiping device comprising a retaining unit, 
           [0014]      FIG. 2  shows a sectional view of a further exemplary embodiment of a wiping device comprising a retaining unit, 
           [0015]      FIG. 3  shows a sectional view of a further exemplary embodiment of a wiping device comprising a retaining unit, 
           [0016]      FIG. 4  shows a sectional view of a further exemplary embodiment of a wiping device comprising a retaining unit, 
           [0017]      FIG. 5  shows a sectional view of a further exemplary embodiment of a wiping device comprising a retaining unit, 
           [0018]      FIG. 6  shows a sectional view of a further exemplary embodiment of a wiping device comprising a retaining unit and 
           [0019]      FIG. 7  shows a sectional view of a further exemplary embodiment of a wiping device comprising a retaining unit. 
       
    
    
     DETAILED DESCRIPTION 
       [0020]      FIG. 1  shows an exemplary embodiment of a wiping device according to the invention comprising a retaining unit  10   a  having a retaining element  12   a  which comprises a longitudinal guide channel  14   a  for guiding a spring element  16   a,  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   a.    
         [0021]    The retaining element  12   a  comprises two fastening means  18   a,    20   a.  The fastening means  18   a,    20   a  are configured integrally with the retaining element  12   a.  The fastening means  18   a,    20   a  at their free ends  24   a,    26   a  face in directions opposing one another. Moreover, the fastening means  18   a,    20   a  form two channel walls  36   a,    38   a  which adjoin the longitudinal guide channel  14   a  on a side remote from the wiper strip. The fastening means  18   a,    20   a  are angled back in the region of their free ends  24   a,    26   a  in the direction of the longitudinal guide channel  14   a.  The ends  24   a,    26   a  are encompassed by a spoiler element  22   a.  To this end, the spoiler element  22   a  comprises two bearing bodies  88   a,    90   a.    
         [0022]    To guide the spring element  16   a  lateral walls  52   a,    54   a  of the longitudinal guide channel  14   a  adjoin the channel walls  36   a,    38   a.  The channel walls  36   a,    38   a  in this case enclose a right angle with the side walls  52   a,    54   a.  Moreover, an intermediate wall  56   a  is arranged on the side walls  52   a,    54   a,  said intermediate wall terminating 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 intermediate wall  56   a  in a direction opposing the wiper strip  40   a.  The retaining element  12   a  has a longitudinal opening  84   a  which opens the longitudinal guide channel  14   a  toward the spoiler element  22   a.    
         [0023]    A keder track  70   a  is arranged on the intermediate wall  56   a,  said keder track comprising two guide profiles  58   a,    60   a.  The guide profiles  58   a,    60   a  are integrally formed with the retaining element  12   a.  The guide profiles  58   a,    60   a  comprise one respective vertical wall  62   a,    64   a  and one respective horizontal wall  66   a,    68   a.  The horizontal walls  66   a,    68   a  in each case enclose with the vertical walls  62   a,    64   a  an acute angle  32   a,    34   a  of 77°. The vertical walls  62   a,    64   a  enclose in each case an angle of 90° relative to the intermediate wall  56   a.  The guide profiles  58   a,    60   a  at their free ends of the horizontal walls  66   a,    68   a  face in directions facing one another. 
         [0024]    The intermediate wall  56   a  adjoins the longitudinal guide channel  14   a  of the retaining element  12   a  and comprises two surfaces  42   a,    44   a  which extend in each case parallel to one of the horizontal walls  66   a,    68   a.  The two surfaces  42   a,    44   a  in each case adjoin a third surface  46   a  which is arranged between the surfaces  42   a,    44   a.  The surfaces  42   a,    44   a  in each case enclose with the third surface  46   a  an obtuse angle  48   a,    50   a  of 167°. 
         [0025]    The spoiler element  22   a  is produced in an extrusion process. The spoiler element  22   a  has two spoiler sides  76   a,    78   a  configured in an outwardly concave manner. To reinforce the spoiler element  22   a,  a connecting web  30   a  is provided which connects together the concave spoiler sides  76   a,    78   a.  The connecting web  30   a  and the spoiler sides  76   a,    78   a  are connected together by a material connection and encompass a longitudinal channel  82   a  which has a triangular cross section. 
         [0026]    The spoiler element  22   a  is provided to deflect driving wind. The spoiler element  22   a  forms the bearing bodies  88   a,    90   a.  The bearing bodies  88   a,    90   a  bear positively against the channel walls  36   a,    38   a  and the fastening means  18   a,    20   a.  The spoiler element  22   a  positively surrounds the fastening means  18   a,    20   a.    
         [0027]    The retaining element  12   a  is produced in one piece from polyethylene in an extrusion process. In this connection, a person skilled in the art will consider different synthetic materials which appear expedient, such as for example polypropylene, polyamide, polyvinylchloride and/or polystyrene. 
         [0028]    The spring element  16   a  is produced from a spring steel and provided to configure the retaining unit  10   a  to be elastically deflectable. For assembly, initially the spring element  16   a  is inserted into the longitudinal guide channel  14   a.  Subsequently, the wiper strip  40   a  is pushed into the keder track  70   a  and forms a positive connection with the retaining element  12   a.  The surfaces  42   a,    44   a,    46   a  bear positively against the wiper strip  40   a.  The spoiler element  22   a  is now pushed over the fastening means  18   a,    20   a  and is then positively connected thereto. 
         [0029]    In  FIGS. 2 to 7  six further exemplary embodiments of the invention are shown. The following descriptions are substantially limited to the differences between the exemplary embodiments, wherein reference may be made to the description of the first exemplary embodiment relative to components, features and functions which remain the same. To differentiate between the exemplary embodiments, the letter a in the reference numerals of the exemplary embodiment in  FIG. 1  is replaced by the letters b to g in the reference numerals of the exemplary embodiments of  FIGS. 2 to 7 . Relative to components which are identified as the same, in particular relative to components with the same reference numerals, in principle reference may also be made to the drawings and/or the description of the first exemplary embodiment. 
         [0030]      FIG. 2  shows a further exemplary embodiment of a wiping device according to the invention comprising a retaining unit  10   b  having a retaining element  12   b  which comprises a longitudinal guide channel  14   b  for guiding a spring element  16   b,  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   b.    
         [0031]    The retaining element  12   b  has two fastening means  18   b,    20   b.  The fastening means  18   b,    20   b  are integrally formed with the retaining element  12   b.  The fastening means  18   b,    20   b  at their free ends  24   b,    26   b  face in directions opposing one another. Moreover, the fastening means  18   b,    20   b  form two channel walls  36   b,    38   b  which adjoin the longitudinal guide channel  14   b  on a side remote from the wiper strip. The fastening means  18   b,    20   b  are angled back in the region of their free ends  24   b,    26   b  in the direction of the longitudinal guide channel  14   b.  The ends  24   b,    26   b  are encompassed by a spoiler element  22   b.  To this end, the spoiler element  22   b  comprises two bearing bodies  88   b,    90   b.    
         [0032]    To guide the spring element  16   b,  lateral walls  52   b,    54   b  of the longitudinal guide channel  14   b  adjoin channel walls  36   b,    38   b.  The channel walls  36   b,    38   b  in this case enclose a right angle with the side walls  52   b,    54   b.  Moreover, an intermediate wall  56   b  is arranged on the lateral walls  52   b,    54   b,  said intermediate wall terminating the longitudinal guide channel  14   b  in the direction of a wiper strip  40   b.  The lateral walls  52   b,    54   b  extend from the intermediate wall  56   b  in a direction opposing the wiper strip  40   b.  A second intermediate wall  86   b  terminates the longitudinal guide channel  14   b  in the direction of the spoiler element  22   b.  Thus the longitudinal guide channel  14   b  is entirely enclosed. 
         [0033]    A keder track  70   b  is arranged on the intermediate wall  56   b,  said keder track comprising two guide profiles  58   b,    60   b.  The guide profiles  58   b,    60   b  are integrally formed with the retaining element  12   b.  The guide profiles  58   b,    60   b  comprise one respective vertical wall  62   b,    64   b  and one respective horizontal wall  66   b,    68   b.  The horizontal walls  66   b,    68   b  in each case enclose with the vertical walls  62   b,    64   b  an acute angle  32   b,    34   b  of 77°. The vertical walls  62   b,    64   b  in each case enclose an angle of 90° relative to the intermediate wall  56   b.  The guide profiles  58   b,    60   b  at their free ends of the horizontal walls  66   b,    68   b  face in directions facing one another. 
         [0034]    The intermediate wall  56   b  adjoins the longitudinal guide channel  14   b  of the retaining element  12   b  and comprises two surfaces  42   b,    44   b  which in each case extend parallel to one of the horizontal walls  66   b,    68   b.  The two surfaces  42   b,    44   b  in each case adjoin a third surface  46   b  which is arranged between the surfaces  42   b,    44   b.  The surfaces  42   b,    44   b  in each case enclose an obtuse angle  48   b,    50   b  of 167° with the third surface  46   b.    
         [0035]    The spoiler element  22   b  is produced in an extrusion process. The spoiler element  22   b  has two spoiler sides  76   b,    78   b  configured in an outwardly concave manner. To reinforce the spoiler element  22   b,  a connecting web  30   b  is provided which connects together the concave spoiler sides  76   b,    78   b.  The connecting web  30   b  and the spoiler sides  76   b,    78   b  are connected together by a material connection and encompass a longitudinal channel  82   b  which has a triangular cross section. 
         [0036]    The spoiler element  22   b  is provided to deflect driving wind. The spoiler element  22   b  forms the bearing bodies  88   b,    90   b.  The bearing bodies  88   b,    90   b  bear positively against the channel walls  36   b,    38   b  and against the fastening means  18   b,    20   b.  The spoiler element  22   b  positively surrounds the fastening means  18   b,    20   b.    
         [0037]    The retaining element  12   b  is produced in an extrusion process in one piece from polyethylene. In this connection, a person skilled in the art will consider different synthetic materials which appear expedient, such as for example polypropylene, polyamide, polyvinylchloride and/or polystyrene. 
         [0038]    The spring element  16   b  is produced from a spring steel and is provided to configure the retaining unit  10   b  to be elastically deflectable. For assembly, the spring element  16   b  is initially inserted into the longitudinal guide channel  14   b.  Subsequently, the wiper strip  40   b  is pushed into the keder track  70   b  and forms a positive connection with the retaining element  12   b.  The surfaces  42   b,    44   b,    46   b  bear positively against the wiper strip  40   b.  The spoiler element  22   b  is now pushed over the fastening means  18   b,    20   b  and then positively connected thereto. 
         [0039]      FIG. 3  shows a wiping device according to the invention comprising a retaining unit  10   c  having a retaining element  12   c  which comprises a longitudinal guide channel  14   c  for guiding a spring element  16   c,  as well as a spoiler element  22   c  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   c.    
         [0040]    To guide the spring element  16   c,  the longitudinal guide channel  14   c  comprises lateral walls  52   c,    54   c.  Moreover, an intermediate wall  56   c  is arranged on the lateral walls  52   c,    54   c,  said intermediate wall terminating the longitudinal guide channel  14   c  in the direction of a wiper strip  40   c.  The lateral walls  52   c,    54   c  extend from the intermediate wall  56   c  in a direction opposing the wiper strip  40   c.  A second intermediate wall  86   c  terminates the longitudinal guide channel  14   c  in the direction of the spoiler element  22   c.  Thus the longitudinal guide channel  14   c  is entirely enclosed. One respective fastening means  18   c,    20   c  is integrally formed on the lateral walls  52   c,    54   c,  said fastening means in each case facing with a free end  24   c,    26   c  the longitudinal guide channel  14   c.  The fastening means  18   c,    20   c  are of L-shaped configuration and adjoin the lateral walls  52   c,    54   c  at an obtuse angle of 60°. 
         [0041]    A keder track  70   c  is arranged on the intermediate wall  56   c,  said keder track comprising two guide profiles  58   c,    60   c.  The guide profiles  58   c,    60   c  are configured integrally with the retaining element  12   c.  The guide profiles  58   c,    60   c  comprise one respective vertical wall  62   c,    64   c  and one respective horizontal wall  66   c,    68   c.  The horizontal walls  66   c,    68   c  in each case enclose with the vertical walls  62   c,    64   c  an acute angle  32   c,    34   c  of 77°. The vertical walls  62   c,    64   c  in each case enclose an angle of 90° relative to the intermediate wall  56   c.  The guide profiles  58   c,    60   c  at their free ends of the horizontal walls  66   c,    68   c  face in directions facing one another. 
         [0042]    The intermediate wall  56   c  adjoins the longitudinal guide channel  14   c  of the retaining element  12   c  and comprises two surfaces  42   c,    44   c  which in each case extend parallel to one of the horizontal walls  66   c,    68   c.  The two surfaces  42   c,    44   c  in each case adjoin a third surface  46   c  which is arranged between the surfaces  42   c,    44   c.  The surfaces  42   c,    44   c  in each case enclose an obtuse angle  48   c,    50   c  of 167° with the third surface  46   c.    
         [0043]    The spoiler element  22   c  has two spoiler sides  76   c,    78   c  configured in an outwardly concave manner. To reinforce the spoiler element  22   c,  a connecting web  30   c  which connects together the concave spoiler sides  76   c,    78   c  is provided. The connecting web  30   c  and the spoiler sides  76   c,    78   c  are connected together by a material connection and define a longitudinal channel  82   c  which comprises a triangular cross section. 
         [0044]    The spoiler element  22   c  is provided for deflecting driving wind. Two bearing bodies  88   c,    90   c  are formed from the spoiler element  22   c.  The bearing bodies  88   c,    90   c  bear positively against channel walls  36   c,    38   c  and against the fastening means  18   c,    20   c.  The spoiler element  22   c  positively surrounds the fastening means  18   c,    20   c.  The spoiler element  22   c  has two fastening grooves  72   c,    74   c  which in each case form a positive connection with the fastening means  18   c,    20   c.    
         [0045]    The retaining element  12   c  is produced in one piece from polyethylene in an extrusion process. In this connection, a person skilled in the art will consider different synthetic materials which appear expedient, such as for example polypropylene, polyamide, polyvinylchloride and/or polystyrene. The spring element  16   c  is produced from a spring steel and is provided to configure the retaining unit  10   c  to be elastically deflectable. 
         [0046]    For assembly, the spring element  16   c  is initially inserted into the longitudinal guide channel  14   c.  Subsequently, the wiper strip  40   c  is pushed into the keder track  70   c  and forms a positive connection with the retaining element  12   c.  The surfaces  42   c,    44   c,    46   c  bear positively against the wiper strip  40   c.  The spoiler element  22   c  is now pushed over the fastening means  18   c,    20   c  and then positively connected thereto. 
         [0047]      FIG. 4  shows a further exemplary embodiment of a wiping device according to the invention comprising a retaining unit  10   d  having a retaining element  12   d  which comprises a longitudinal guide channel  14   d  for guiding a spring element  16   d,  as well as a spoiler element  22   d,  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   d.    
         [0048]    To guide the spring element  16   d,  the longitudinal guide channel  14   d  has lateral walls  52   d,    54   d.  Moreover, an intermediate wall  56   d  is arranged on the lateral walls  52   d,    54   d,  said intermediate wall terminating the longitudinal guide channel  14   d  in the direction of a wiper strip  40   d.  The lateral walls  52   d,    54   d  extend from the intermediate wall  56   d  in a direction opposing the wiper strip  40   d.  A second intermediate wall  86   d  terminates the longitudinal guide channel  14   d  in the direction of the spoiler element  22   d.  Thus the longitudinal guide channel  14   d  is entirely enclosed. In each case a lateral strip  94   d,    96   d  is integrally formed on the lateral walls  52   d,    54   d.    
         [0049]    A keder track  70   d  is arranged on the intermediate wall  56   d,  said keder track comprising two guide profiles  58   d,    60   d.  The guide profiles  58   d,    60   a  are integrally formed with the retaining element  12   d.  The guide profiles  58   d,    60   d  comprise one respective vertical wall  62   d,    64   d  and one respective horizontal wall  66   d,    68   d.  The horizontal walls  66   d,    68   d  in each case enclose with the vertical walls  62   d,    64   d  an acute angle  32   d,    34   d  of 77°. The vertical walls  62   d,    64   d  in each case enclose an angle of 90° relative to the intermediate wall  56   d.  The guide profiles  58   d,    60   d  at their free ends of the horizontal walls  66   d,    68   d  face in directions facing one another. 
         [0050]    The intermediate wall  56   d  adjoins the longitudinal guide channel  14   d  of the retaining element  12   d  and comprises two surfaces  42   d,    44   d  which in each case extend parallel to one of the horizontal walls  66   d,    68   d.  The two surfaces  42   d,    44   d  in each case adjoin a third surface  46   d  which is arranged between the surfaces  42   d,    44   d.  The surfaces  42   d,    44   d  in each case enclose an obtuse angle  48   d,    50   d  of 167° with the third surface  46   d.    
         [0051]    The spoiler element  22   d  is produced in an extrusion process. The spoiler element  22   d  has two spoiler sides  76   d,    78   d  configured in an outwardly concave manner. To reinforce the spoiler element  22   d,  a connecting web  30   d  which connects together the concave spoiler sides  76   d,    78   d  is provided. The connecting web  30   d  and the spoiler sides  76   d,    78   d  are connected together by a material connection and encompass a longitudinal channel  82   d  which has a triangular cross section. 
         [0052]    The spoiler element  22   d  is provided for deflecting driving wind. The spoiler element  22   d  positively surrounds the fastening means  18   d,    20   d.  The connecting web  30   d  is partially incorporated in a recess  92   d  of the second intermediate wall  86   d  and thus forms with the second intermediate wall  86   d  a positive connection acting in a wiping direction  28   d.  The spoiler element  22   d  bears laterally against the retaining element  12   d  in the region of the longitudinal guide channel  14   d.    
         [0053]    The retaining element  12   d  is produced in one piece from polyethylene. In this connection, a person skilled in the art will consider different synthetic materials which appear expedient, such as for example polypropylene, polyamide, polyvinylchloride and/or polystyrene. 
         [0054]    The spring element  16   d  is incorporated in the longitudinal guide channel  14   d.  The spring element  16   d  is produced from a spring steel and provided to configure the retaining unit  10   d  to be elastically deflectable. 
         [0055]    For assembly, the spring element  16   d  is initially inserted into the longitudinal guide channel  14   d.  Subsequently, the wiper strip  40   d  is pushed into the keder track  70   d  and forms a positive connection with the retaining element  12   d.  The spoiler element  22   d  is now pushed over the retaining element  12   d  and is then positively connected thereto. 
         [0056]      FIG. 5  shows a further exemplary embodiment of a wiping device according to the invention comprising a retaining unit  10   e  having a retaining element  12   e  which comprises a longitudinal guide channel  14   e  for guiding a spring element  16   e,  as well as a spoiler element  22   e,  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   e.    
         [0057]    To guide the spring element  16   e,  the longitudinal guide channel  14   e  comprises lateral walls  52   e,    54   e.  Moreover, an intermediate wall  56   e  is arranged on the lateral walls  52   e,    54   e,  said intermediate wall terminating the longitudinal guide channel  14   e  in the direction of a wiper strip  40   e.  The lateral walls  52   e,    54   e  extend from the intermediate wall  56   e  in a direction opposing the wiper strip  40   e.  A second intermediate wall  86   e  terminates the longitudinal guide channel  14   e  in the direction of the spoiler element  22   e.  Thus the longitudinal guide channel  14   e  is entirely enclosed. In each case in a lateral region  98   e,    100   e  an undercut  104   e,    106   e  is arranged in the lateral walls  52   e,    54   e,  said undercut positively connecting the spoiler element  22   e  to the retaining element  12   e  in a wiping direction  28   e.  The undercuts  104   e,    106   e  are of C-shaped configuration and have a cross section tapering toward an opening. 
         [0058]    A keder track  70   e  is arranged on the intermediate wall  56   e,  said keder track comprising two guide profiles  58   e,    60   e.  The guide profiles  58   e,    60   e  are integrally formed with the retaining element  12   e.  The guide profiles  58   e,    60   e  comprise one respective vertical wall  62   e,    64   e  and one respective horizontal wall  66   e,    68   e.  The horizontal walls  66   e,    68   e  in each case enclose with the vertical walls  62   e,    64   e  an acute angle  32   e,    34   e  of 77°. The vertical walls  62   e,    64   e  in each case enclose an angle of 90° relative to the intermediate wall  56   e.  The guide profiles  58   e,    60   e  at their free ends of the horizontal walls  66   e,    68   e  face in directions facing one another. 
         [0059]    The intermediate wall  56   e  adjoins the longitudinal guide channel  14   e  of the retaining element  12   e  and comprises two surfaces  42   e,    44   e  which in each case extend parallel to one of the horizontal walls  66   e,    68   e.  The two surfaces  42   e,    44   e  in each case adjoin a third surface  46   e  which is arranged between the surfaces  42   e,    44   e.  The surfaces  42   e,    44   e  enclose in each case an obtuse angle  48   e,    50   e  of 167° with the third surface  46   e.    
         [0060]    The spoiler element  22   e  is produced in an extrusion process. The spoiler element  22   e  has two spoiler sides  76   e,    78   e  configured in an outwardly concave manner. To reinforce the spoiler element  22   e,  a connecting web  30   e  which connects together the concave spoiler sides  76   e,    78   e  is provided. The connecting web  30   e  and the spoiler sides  76   e,    78   e  encompass a longitudinal channel  82   e  which has a substantially triangular cross section. 
         [0061]    The spoiler element  22   e  is provided for deflecting driving wind. The spoiler element  22   e  bears laterally against the retaining element  12   e  in the region of the longitudinal guide channel  14   e  in a positive manner. The spoiler element  22   e  also bears in the region of the longitudinal guide channel  14   e  against one side of the retaining element  12   e  which faces the wiper strip  40   e.  The spoiler element  22   e  thus bears positively in the region of the longitudinal guide channel  14   e  against the retaining element  12   e  and encompasses the longitudinal guide channel  14   e.  In this case, the spoiler element  22   e  engages in the undercuts  104   e,    106   e  and entirely fills up said undercuts. Thus in the lateral regions  98   e,    100   e  the retaining element  12   e  forms a positive connection with the spoiler element  22   e  acting in the wiping direction  28   e  and in a vertical direction  102   e.    
         [0062]    The retaining element  12   e  is produced in one piece from polyethylene. In this connection, a person skilled in the art will consider different synthetic materials which appear expedient, such as for example polypropylene, polyamide, polyvinylchloride and/or polystyrene. 
         [0063]    The spring element  16   e  is incorporated in the longitudinal guide channel  14   e.  The spring element  16   e  is produced from a spring steel and provided to configure the retaining element  10   e  to be elastically deflectable. 
         [0064]    For assembly, the spring element  16   e  is initially inserted into the longitudinal guide channel  14   e.  Subsequently, the wiper strip  40   e  is pushed into the keder track  70   e  and forms a positive connection with the retaining element  12   e.  The spoiler element  22   e  is now pushed over the retaining element  12   e  and then positively connected thereto. 
         [0065]      FIG. 6  shows a further exemplary embodiment of a wiping device according to the invention comprising a retaining unit  10   f  having a retaining element  12   f,  which comprises a longitudinal guide channel  14   f  for guiding a spring element  16   f,  and comprising a spoiler element  22   f,  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   f.    
         [0066]    The wiping device corresponds substantially to the exemplary embodiment shown in  FIG. 5 . 
         [0067]    In one respective lateral region  98   f,    100   f,  the retaining element  12   f  and the spoiler element  22   f  have a surface  108   f,    110   f  which extends parallel to a horizontal wall  66   f,    68   f  of a keder track  70   f  of the retaining element  12   f.  The surface  108   f,    110   f  in each case encloses an angle of 13° with a wiping direction  28   f.    
         [0068]      FIG. 7  shows a further exemplary embodiment of a wiping device according to the invention comprising a retaining unit  10   g  having a retaining element  12   g  which comprises a longitudinal guide channel  14   g  for guiding a spring element  16   g,  and comprising a spoiler element  22   g,  in a sectional view. The cutting plane extends perpendicular to a longitudinal direction of the retaining element  12   g.  The wiping device corresponds substantially to the exemplary embodiment shown in  FIG. 6 . 
         [0069]    In one respective side region  98   g,    100   g,  the retaining element  12   g  has a surface  108   g,    110   g  which extends parallel to a horizontal wall  66   g,    68   g  of a keder track  70   g  of the retaining element  12   g.  The surface  108   g,    110   g  in each case encloses an angle of 13° with a wiping direction  28   g.    
         [0070]    The spoiler element  22   g  bears in the region of the longitudinal guide channel  14   g  against one side of the retaining element  12   g  which faces a wiper strip  40   g.  In this case, the spoiler element  22   g  also bears positively against the surfaces  108   g,    110   g  of the retaining element  12   g.  The spoiler element  22   g  also bears against vertical walls  62   g,    64   g  of the keder track  70   g.