Abstract:
The invention proposes a wind deflector unit, more particularly a wiper arm wind deflector unit, having at least one wind deflector element ( 112   a,    112   b;    212   a,    212   b;    312   a,    312   b ), having at least one first coupling unit ( 114   a   , 114   b   ; 214   a   , 214   b   ; 314   a   , 314   b ) which in an installed condition is designed to be connected to a wiper stem ( 116; 216; 316 ) of a wiper arm ( 118; 218; 318 ), and having at least one second coupling unit ( 120   a,    120   b;    220   a,    220   b;    320   a,    320   b ) which in an installed condition is designed to receive a wiper fluid duct ( 122; 222; 322 ).

Description:
BACKGROUND OF THE INVENTION 
       [0001]    A wind deflector unit has already been proposed. 
       SUMMARY OF THE INVENTION 
       [0002]    A wind deflector unit, in particular a wiper arm wind deflector unit, is proposed, comprising at least one wind deflector element, comprising at least one first coupling unit which in a mounted state is provided to be connected to a wiper stem of a wiper arm, and comprising at least one second coupling unit which in a mounted state is provided to receive a windshield wiper fluid duct. “Wind deflector element” is intended to be understood, in particular, in this context as a unit which is provided to deflect driving wind acting on the wiper arm device and/or to be used for pressing the wiper arm device against a wiper arm. Preferably, the wind deflector element has at least one concave outer surface. Moreover, “coupling unit” is intended to be understood in this context, in particular, as a unit which is provided for producing a connection, in particular a connection which is releasable without damage. Preferably, a unit is intended to be understood thereby which is provided to connect at least the wiper arm unit by a positive, non-positive and/or material connection to a wiper stem of a wiper arm and/or a windshield wiper fluid duct. Particularly preferably, a unit is intended to be understood thereby which is provided for producing a connection which is releasable without damage, wherein the connection in this case is able to be produced, in particular, without the use of a tool. “Provided” is intended in this context to be understood, in particular, as specifically programmed, designed and/or equipped. By an object being provided for a specific function is intended to be understood, in particular, that the object fulfills and/or performs this specific function in at least one usage state and/or operating state. Moreover, in this context a “wiper stem” is intended to be understood, in particular, as an elongated component of the wiper arm which extends at least substantially parallel to a main direction of extent of the wiper arm. Preferably, in particular, a component is intended to be understood thereby which is provided to connect a drive shaft of the wiper arm indirectly to a receiving region for a wiper blade for transmitting a movement, in particular a rotational movement. Moreover, in this context, a “windshield wiper fluid duct” is intended to be understood, in particular, as a duct which is provided, in particular, to conduct in particular at least in a partial portion windshield wiper fluid during operation of the windshield wiper fluid distribution unit, in particular, from a tank to a wiper nozzle unit. Preferably, intended to be understood thereby is a duct which is provided in at least one partial portion to take windshield wiper fluid to a line and/or delivery unit. Particularly preferably, intended to be understood thereby, in particular, is a duct which is provided in at least one operating mode for directly receiving windshield wiper fluid. 
         [0003]    By means of the embodiment according to the invention of the wind deflector unit, in particular inadvertent release of the wind deflector unit from the wiper stem may be prevented. In particular, as a result, an advertent release of the wind deflector unit, for example by driving wind, may be prevented and/or avoided. 
         [0004]    It is further proposed that the at least one wind deflector unit is integrally configured with the at least one first coupling unit and/or with the at least one second coupling unit. Preferably the at least one wind deflector element of the at least one first coupling unit and the at least one second coupling unit are formed in one piece. “Integrally” is intended to be understood, in particular, as being at least connected by a material connection, for example by a welding process, an adhesive bonding process, an injection-molding process and/or a further process which appears expedient to the person skilled in the art and/or is intended to be understood as advantageously formed in one piece, such as for example by producing from a casting and/or by producing in a single-component or multi-component injection-molding method and advantageously from a single blank. Preferably, it is intended to be understood thereby, in particular, that it is produced in one piece, particularly preferably produced in a primary shaping process. As a result, an advantageous wind deflector unit may be provided. Preferably, as a result, the number of components may be kept low whereby, in particular, an advantageously simple and rapid mounting may be achieved. 
         [0005]    Moreover, it is proposed that the at least one first coupling unit and the at least one second coupling unit comprise at least one clip fastening element. “Clip fastening element” is intended to be understood, in particular, in this context as a fastening element which has at least one latching means. The at least one latching means may in this case be provided both for latching to the fastening element itself and/or to a component to be coupled. In this case “latching means” is intended to be understood, in particular, as a resilient means for producing a latching connection which is provided during mounting to be deflected in a resilient manner. As a result, a wind deflector unit which is particularly easy to mount may be provided. In particular, as a result, a particularly advantageously simple coupling may be achieved. Preferably, the wind deflector unit may be easily clipped by an operator onto the wiper arm. In particular, as a result, a simple and rapid retrofitting of a wind deflector unit onto a wiper arm may be achieved. Moreover, as a result, a windshield wiper fluid duct may be clipped particularly easily onto the wind deflector unit. In particular, as a result, a simple and rapid retrofitting of a windshield wiper fluid duct on a wiper arm may be achieved via the wind deflector unit. 
         [0006]    It is further proposed that the at least one first coupling unit or the at least one second coupling unit comprises at least one clip fastening element. As a result, a wind deflector unit which is particularly simple to mount may be provided. In particular, as a result, a particularly advantageously simple coupling may be achieved. Preferably, the wind deflector unit may be clipped easily by an operator onto the wiper arm or a windshield wiper fluid duct may be clipped onto the wind deflector unit. In particular, as a result, a simple and rapid retrofitting of a wind deflector unit on a wiper arm may be achieved. 
         [0007]    It is further proposed that the at least one first coupling unit and the at least one second coupling unit in each case have a receiving region which are connected together. “Receiving region” is intended to be understood in this context, in particular, as a region which is provided for receiving a component to be coupled. Preferably, the receiving region, in particular, has a recess which has a cross-sectional shape which corresponds at least approximately to a cross-sectional shape of a component to be received in a received region. Particularly preferably, the recess in at least one plane, viewed from a central point of the recess within the planes, is surrounded by walls of the coupling unit in an angular range of at least 90°, preferably of at least 180° and particularly preferably of at least 270°. In this case “corresponding at least approximately” in this context is intended to be understood, in particular, that at least 40%, preferably at least 60% and particularly preferably a maximum of 80% of a surface of a cross-sectional shape relative to a surface of the at least approximately corresponding cross-sectional shape are congruent. Moreover, in this context “connected” is intended to be understood, in particular, that the receiving regions adjoin one another directly at least in one region. Preferably, it is intended to be understood thereby, in particular, that the receiving regions adjoin one another directly in at least one region without separation. As a result, a particularly advantageous and reliable coupling of the wind deflector unit to the wiper arm and the windshield wiper fluid duct may be achieved. In particular, as a result, a particularly simple and intuitive mounting may be implemented. Moreover, as a result, an advantageous use of space may be achieved. 
         [0008]    Moreover, it is proposed that the receiving regions of the at least one first coupling unit and the at least one second coupling unit have a common opening region. “Opening region” is intended to be understood in this context, in particular, as a region, preferably a region which does not consist of material and which preferably adjoins at least one receiving region and via which the at least one adjoining receiving region is connected directly to the surroundings of the wind deflector unit. Preferably, a region is intended to be understood thereby via which the at least one adjoining receiving region in a plane perpendicular to a main direction of extent of the receiving region and/or the wind deflector unit is directly connected to the surroundings of the wind deflector unit. Particularly preferably, intended to be understood thereby in particular is a region in which the at least one adjoining receiving region, viewed in a plane perpendicular to a main direction of extent of the receiving region and/or the wind deflector unit, is not limited by a material body of the at least one first coupling unit and/or the at least one second coupling unit. In this case “main direction of extent” is intended to be understood as a sub-assembly and/or a region, in particular a direction, which extends parallel to a longest side edge of a smallest geometric cuboid, which only just completely encloses the sub-assembly and/or the region. As a result, a particularly advantageously simple mounting may be achieved. In particular, as a result, a coupling may be carried out by the coupling units via only one opening region. 
         [0009]    Moreover, it is proposed that the at least one first coupling unit has a first receiving region with a first opening region and that the at least one second coupling unit has a second receiving region with a second opening region differing from the first opening region. As a result, a particularly advantageously simple mounting may be achieved. In particular, a separate coupling and uncoupling may be carried out as a result by the coupling units. 
         [0010]    It is further proposed that the first opening region is arranged on a side of the first receiving region remote from the second receiving region and in that the second opening region is arranged on a side of the second receiving region remote from the first receiving region. As a result, a particularly advantageously simple mounting may be achieved. In particular, as a result, a clear separation of the opening regions may be achieved whereby an intuitive mounting may be achieved. 
         [0011]    Advantageously, the wind deflector element forms a hollow space which, viewed in a main direction of extent, extends over at least a large proportion of a length of the wind deflector element. “At least a large proportion” is intended in this context to be understood, in particular, as at least 50%, preferably at least 70%, and particularly preferably at least 90% of the whole. As a result, an advantageously low weight of the wind deflector unit may be achieved with an advantageously high degree of stability. 
         [0012]    The wind deflector unit according to the invention in this case is not intended to be limited to the above-described use and embodiment. In particular, for fulfilling a mode of operation described herein the wind deflector unit according to the invention may have a different number of individual elements, components and units from a number cited herein. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]    Further advantages are disclosed from the following description of the drawings. In the drawings, six exemplary embodiments of the invention are shown. 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 form further meaningful combinations. 
           [0014]    In the drawings: 
           [0015]      FIG. 1  shows a wiper arm device comprising a wind deflector unit according to the invention and comprising a wiper nozzle unit, a wiper arm and a partial detail of a wiper blade in a schematic view, 
           [0016]      FIG. 2  shows the wind deflector unit according to the invention comprising a wind deflector element in a mounted state in a schematic sectional view along the cutting line II, 
           [0017]      FIG. 3  shows the wind deflector unit according to the invention comprising an alternative wind deflector element in a mounted state in a schematic sectional view along the cutting line III, 
           [0018]      FIG. 4  shows an alternative wiper arm device comprising an alternative wind deflector unit according to the invention and comprising a wiper nozzle unit, a wiper arm and a partial detail of a wiper blade in a schematic view, 
           [0019]      FIG. 5  shows the alternative wind deflector unit according to the invention comprising a wind deflector element in a mounted state in a schematic sectional view along the cutting line V, 
           [0020]      FIG. 6  shows the alternative wind deflector unit according to the invention comprising an alternative wind deflector element in a mounted state in a schematic sectional view along the cutting line VI, 
           [0021]      FIG. 7  shows a further alternative wiper arm device comprising a further alternative wind deflector unit according to the invention and comprising a wiper nozzle unit, a wiper arm and a partial detail of a wiper blade in a schematic view, 
           [0022]      FIG. 8  shows the alternative wind deflector unit according to the invention comprising a wind deflector element in a mounted state in a schematic sectional view along the cutting line VIII and 
           [0023]      FIG. 9  shows the alternative wind deflector unit according to the invention comprising an alternative wind deflector element in a mounted state in a schematic sectional view along the cutting line IX. 
       
    
    
     DETAILED DESCRIPTION 
       [0024]      FIG. 1  shows a wiper arm device  136  comprising a wind deflector unit  110   a ,  110   b  according to the invention, a wiper arm  118  and a wiper blade  138 . Moreover,  FIG. 1  shows a surface  140  to be washed of a motor vehicle, not visible further. The surface  140  to be washed is formed by a windshield. 
         [0025]    The wiper arm  118  has a wiper stem  116 . The wiper stem  116  has two wiper arm segments  142 ,  144  and a hinge  146 . The wiper arm segments  142 ,  144  are connected via the hinge  146 . Moreover, a spring element, not visible further, is arranged in the region of the hinge  146 . The spring element, not visible further, is provided to press the second wiper arm segment  144  in the direction of the surface  140  to be washed in a contact region of the second wiper arm segment  144 . The surface  140  to be washed is formed by a motor vehicle windshield. The first wiper arm segment  142  is connected via a shaft  148  to the motor vehicle, not visible further. The shaft  148 , viewed in a main direction of extent  150  of the wiper arm  118 , is connected to the wiper stem  116  on an outer end of the wiper arm  118 . The shaft  148  is driven by a drive motor, not visible further. A wiper arm adapter  152  is arranged at an end of the second wiper arm segment  144  remote from the hinge  146 . The wiper arm adapter  152  is configured integrally with the second wiper arm segment  144 . The wiper arm adapter  152  is provided for receiving a wiper blade adapter  154  of the wiper blade  138 . The wiper arm adapter  152  receives the wiper blade adapter  154 . 
         [0026]    The wiper blade  138  comprises the wiper blade adapter  154 . The wiper blade  138  comprises the wiper blade adapter  154  for coupling to the wiper arm  118 . Moreover, the wiper blade  138  has a wiper blade wind deflector unit  156 , two spring rails, not visible further, a wiper lip, not visible further, and two end caps  158 , only one thereof being visible. The wiper blade  138  wipes in an operating mode over the surface  140  to be washed. The wiper lip, not visible further, of the wiper blade  138  is provided, during a wiping operating mode, to bear against the surface  140  to be washed and to wipe over said surface. The wiper lip, not visible further, is held via the spring rails, not visible further, in the wiper blade wind deflector unit  156 . 
         [0027]    The wiper arm device  136  has a windshield wiper fluid duct  122 . The windshield wiper fluid duct  122  is provided to conduct windshield wiper fluid along the wiper arm  118 . The windshield wiper fluid duct  122  is formed by a tube. Moreover, the windshield wiper fluid duct  122  is configured to be substantially hollow cylindrical. 
         [0028]    Moreover, the wiper arm device  136  has a wiper nozzle unit  160 . The wiper nozzle unit  160  has a wiper nozzle element  162 . The wiper nozzle element  162  is formed by a nozzle. Moreover, the wiper nozzle element  162  is provided for applying windshield wiper fluid onto the surface  140  to be washed. The wiper nozzle element  162  is provided for applying windshield wiper fluid onto the windshield. The wiper nozzle element  162  is integrated in a base body  164  of the wiper nozzle unit  160 . The wiper nozzle element  162  is connected, in a manner not visible further, to a connector, not visible further, for the windshield wiper fluid duct  122 . Moreover, the wiper nozzle unit  160  has a coupling unit, not visible further. The coupling unit, not visible further, of the wiper nozzle unit  160  is provided to be connected to the wiper arm adapter  152  of the wiper arm  118  in a mounted state. The coupling unit, not visible further, of the wiper nozzle unit  160  is coupled to the wiper arm adapter  152 , in a manner not visible further. 
         [0029]    The windshield wiper fluid duct  122  is connected to the wiper nozzle unit  160  via the connector, not visible further. On an end of the windshield wiper fluid duct  122  remote from the wiper nozzle unit  160 , the windshield wiper fluid duct  122 , not visible further, is connected to a windshield wiper fluid supply, not visible further. 
         [0030]      FIG. 2  shows the wind deflector unit  110   a  of the wiper arm device  136  comprising a wind deflector element  112   a  in a mounted state. The wiper arm device  136  comprises the wind deflector unit  110   a . The wind deflector unit  110   a  has a main direction of extent  166  which in a mounted state corresponds to a main direction of extent  150  of the wiper arm  118 . The wind deflector unit  110   a  is formed by a wiper arm wind deflector unit. The wind deflector unit  110   a  comprises the wind deflector element  112   a . The wind deflector element  112   a  extends, viewed in the main direction of extent  166  of the wind deflector unit  110   a , over the entire length of the wind deflector unit  110   a . The wind deflector element  112   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , is configured to be approximately triangular. An enlarged outer face of the wind deflector element  112   a  in this plane is curved in a concave manner. A second outer face of the wind deflector element  112   a  in this plane is curved in a convex manner. Moreover, the wind deflector element  112   a  forms a hollow space  168   a . The hollow space  168   a  of the wind deflector element  112   a , viewed in the main direction of extent  166  of the wind deflector unit  110   a , extends over the entire length of the wind deflector element  112   a . The hollow space  168   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , has an outer contour which corresponds approximately to an outer contour of the wind deflector element  112   a  at a reduced scale. The outer contour of the hollow space  168   a  is similar to the outer contour of the wind deflector element  112   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a.    
         [0031]    Moreover, the wind deflector unit  110   a  comprises a first coupling unit  114   a . The first coupling unit  114   a  in a mounted state of the wind deflector unit  110   a  is provided to be connected to the wiper stem  116  of the wiper arm  118 . The first coupling unit  114   a  is provided to be connected to the second wiper arm segment  144  of the wiper stem  116 . The first coupling unit  114   a  is provided to connect the wind deflector unit  110   a  to the wiper stem  116  of the wiper arm  118 . The first coupling unit  114   a  directly adjoins the wind deflector element  112   a . The first coupling unit  114   a  adjoins the wind deflector element  112   a  in a direction perpendicular to a main extension plane  170  of the wiper stem  116  and perpendicular to a main direction of extent  166  of the wind deflector unit  110   a . Moreover, the first coupling unit  114   a  comprises a clip fastening element  124   a . The clip fastening element  124   a  has two fastening webs  172   a ,  172   a ′. The fastening webs  172   a ,  172   a ′ in each case are partially formed by latching elements. The fastening webs  172   a ,  172   a ′, viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , have in each case an L-shaped cross-sectional shape, wherein the two fastening webs  172   a ,  172   a ′ are mirror-symmetrical relative to one another. The freestanding ends of the L-shaped fastening webs  172   a ,  172   a ′ in each case face one another. The sides of the fastening webs  172   a ,  172   a ′ extend parallel to one another. The two fastening webs  172   a ,  172   a ′ are connected together at the ends of the two sides remote from the freestanding ends, via a bottom side  174   a  of the clip fastening element  124   a  of the first coupling unit  114   a . The bottom side  174   a  of the first coupling unit  114   a  directly adjoins the wind deflector element  112   a.    
         [0032]    The first coupling unit  114   a  has, moreover, a receiving region  128   a . The receiving region  128   a  is provided for receiving the wiper stem  116  of the wiper arm  118 . The receiving region  128   a  is provided for receiving the second wiper arm segment  144  of the wiper stem  116 . The receiving region  128   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , has a cross-sectional shape which corresponds approximately to a cross-sectional shape of the wiper stem  116 . The receiving region  128   a  extends in the main direction of extent  166  of the wind deflector unit  110   a  over the entire length of the wind deflector unit  110   a . The receiving region  128   a  extends parallel to the main direction of extent  166  of the wind deflector unit  110   a . The receiving region  128   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , is defined on four sides by the clip fastening element  124   a  of the first coupling unit  114   a . The receiving region  128   a  is defined in one direction by the bottom side  174   a  of the clip fastening element  124   a . In three further directions the receiving region  128   a  is defined by the two fastening webs  172   a ,  172   a ′, wherein a gap  176   a  is arranged between the freestanding ends of the two fastening webs  172   a ,  172   a ′. Via the gap  176   a , the wiper stem  116  of the wiper arm  118  is moved into the receiving region  128   a . In this case, the two fastening webs  172   a ,  172   a ′ are deflected resiliently outward by pressure, so that the gap  176   a  is enlarged and the wiper stem  116  may be pushed through the gap  176   a.    
         [0033]    Moreover, the wind deflector unit  110   a  has a second coupling unit  120   a . The second coupling unit  120   a , in a mounted state of the wind deflector unit  110   a , is provided to receive the windshield wiper fluid duct  122 . The second coupling unit  120   a  is provided to receive a windshield wiper fluid duct  122  of the wiper arm device  136 . The second coupling unit  120   a  is provided to connect the wind deflector unit  110   a  to the windshield wiper fluid duct  122 . The second coupling unit  120   a  adjoins the first coupling unit  114   a  on a side remote from the wind deflector element  112   a . Moreover, the second coupling unit  120   a  has a clip fastening element  126   a . The second coupling unit  120   a , relative to a main plane of extent  170  of the wiper stem  116 , is arranged on a side of the first coupling unit  114   a  opposing the wind deflector unit  112   a . The clip fastening element  126   a  consists of two fastening webs  178   a ,  178   a ′. The fastening webs  178   a ,  178   a ′ are in each case partially formed by latching elements. The fastening webs  178   a ,  178   a ′, viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , have in each case a partially C-shaped cross-sectional shape, wherein the two fastening webs  178   a ,  178   a ′ are mirror-symmetrical relative to one another. The two fastening webs  178   a ,  178   a ′ of the second coupling unit  120   a  at one end of the two fastening webs  172   a ,  172   a ′ of the first coupling unit  114   a , remote from the bottom side  174   a  of the first coupling unit  114   a , directly adjoin the two fastening webs  172   a ,  172   a ′ of the first coupling unit  114   a.    
         [0034]    The second coupling unit  120   a  has, moreover, a receiving region  130   a . The receiving region  130   a  is provided for receiving the windshield wiper fluid duct  122 . The receiving region  130   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , has a cross-sectional shape which approximately corresponds to a cross-sectional shape of the windshield wiper fluid duct  122 . The receiving region  130   a  extends in the main direction of extent  166  of the wind deflector unit  110   a  over the entire length of the wind deflector unit  110   a . The receiving region  130   a  extends parallel to the main direction of extent  166  of the wind deflector unit  110   a . The receiving region  130   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , is defined to a large extent by the fastening webs  178   a ,  178   a ′ of the second coupling unit  120   a  and by the fastening webs  172   a ,  172   a ′ of the first coupling unit  114   a . The gap  176   a  between the fastening webs  172   a ,  172   a ′ of the first coupling unit  114   a  adjoins directly the receiving region  130   a . On a side of the receiving region  130   a  remote from the gap  176   a  of the first coupling unit  114   a , a gap  180   a  is located between the two fastening webs  178   a ,  178   a ′ of the second coupling unit  120   a . Via the gap  180   a  of the second coupling unit  120   a , firstly the wiper stem  116  of the wiper arm  118  via the receiving region  130   a  of the second coupling unit  120   a  and via the gap  176   a  of the first coupling unit  114   a  is moved into the receiving region  128   a  of the first coupling unit  114   a . Secondly, via the gap  180   a  of the second coupling unit  120   a  the windshield wiper fluid duct  122  is moved into the receiving region  130   a  of the second coupling unit  114   a . In this case, the two fastening webs  178   a ,  178   a ′ are deflected resiliently outward by pressure so that the gap  180   a  is enlarged and the wiper stem  116  or the windshield wiper fluid duct  122  may be pushed through the gap  180   a.    
         [0035]    The first coupling unit  114   a  and the second coupling unit  120   a  in each case have a clip fastening element  124   a ,  126   a . The clip fastening elements  124   a ,  126   a  are configured integrally. Moreover, the first coupling unit  114   a  and the second coupling unit  120   a  in each case have a receiving region  128   a ,  130   a . The receiving regions  128   a ,  130   a  of the first coupling unit  114   a  and the second coupling unit  120   a  in each case are connected together. The receiving regions  128   a ,  130   a  of the first coupling unit  114   a  and the second coupling unit  120   a  are in each case directly connected together via the gap  176   a  of the first coupling unit  114   a . The receiving regions  128   a ,  130   a  of the first coupling unit  114   a  and the second coupling unit  120   a  also have a common opening region  132   a . Both receiving regions  128   a ,  130   a , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   a , are connected to the surroundings via the gap  180   a  of the second coupling unit  120   a  and thus have a common opening region  132   a.    
         [0036]    Moreover, the wind deflector element  112   a  is integrally configured with the first coupling unit  114   a  and with the second coupling unit  120   a . The wind deflector element  112   a , the first coupling unit  114   a  and the second coupling unit  120   a  are configured in one piece. The wind deflector element  112   a , the first coupling unit  114   a  and the second coupling unit  120   a  consist of the same material. The entire wind deflector unit  110   a  is produced in an extrusion process. 
         [0037]    Moreover, the wind deflector unit  110   a  preferably has a locking element, not visible further. The locking element is provided for securing the wind deflector unit  110   a  on the wiper stem  116  of the wiper arm  118 . The locking element is provided to prevent inadvertent release of the wiper stem  116  of the wiper arm  118  from the first coupling unit  114   a . Moreover, the locking element is provided for securing the windshield wiper fluid duct  122  on the wind deflector unit  110   a . The locking element is provided to prevent inadvertent release of the windshield wiper fluid duct  122  from the second coupling unit  120   a . Different embodiments of the locking element which appear expedient to the person skilled in the art are conceivable. 
         [0038]      FIG. 1  shows a first type of exemplary embodiment, wherein  FIG. 2  shows a first exemplary embodiment of the first type.  FIG. 3  shows a second exemplary embodiment of the first type, with an alternative embodiment of the wind deflector element of the wind deflector unit according to the invention, relative to  FIG. 2 . For differentiating the exemplary embodiments of the first type, the letter a is placed after the reference numerals of the first exemplary embodiment in  FIG. 2  which relate to the wind deflector unit. In the second exemplary embodiment in  FIG. 3  the letter a is replaced by the letter b. 
         [0039]      FIG. 3  shows a wind deflector unit  110   b  according to the invention with an alternative wind deflector element  112   b  in a mounted state. The wind deflector unit  110   b  has the wind deflector element  112   b . The wind deflector element  112   b , viewed in a main direction of extent  166  of the wind deflector unit  110   b , extends over the entire length of the wind deflector unit  110   b . The wind deflector element  112   b  is formed by a curved wall. The wind deflector element  112   b , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   b , has a preferably uniform wall thickness. Moreover, the wind deflector element  112   b , viewed in the plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   b , is curved in a concave-convex manner. A front face of the wind deflector element  112   b  is therefore curved in a concave manner and a rear face is curved in a convex manner. Moreover, the wind deflector element  112   b , viewed in a plane perpendicular to the main direction of extent  166  of the wind deflector unit  110   b , is deflected relative to a main direction of extent  170  of a wiper stem  116 . 
         [0040]    In  FIGS. 4 to 9  two further types of exemplary embodiment of the invention are shown. The following descriptions and drawings are substantially limited to the differences between the exemplary embodiments and/or between the types of exemplary embodiments, wherein relative to components denoted the same, in particular with reference to components with the same reference numerals, in principle reference may also be made to the drawings and/or the description of other exemplary embodiments and/or other types of exemplary embodiments, in particular of  FIGS. 1 to 3 . To differentiate between the types of exemplary embodiments, the numeral  1  is placed before the first type of exemplary embodiment in  FIGS. 1 to 3 . In the type of exemplary embodiment of  FIGS. 4 to 9 , the numeral  1  is replaced by the numerals  2  and  3 . 
         [0041]      FIG. 4  shows a wiper arm device  236  with a wind deflector unit  210   a ,  210   b  according to the invention, a wiper arm  218  and a wiper blade  238 . 
         [0042]      FIG. 5  shows the wind deflector unit  210   a  of the wiper arm device  236  with a wind deflector element  212   a  in a mounted state. The wiper arm device  236  has the wind deflector unit  210   a . The wind deflector unit  210   a  is formed by a wiper arm wind deflector unit. The wind deflector unit  210   a  has a wind deflector element  212   a . The wind deflector element  212   a , viewed in the main direction of extent  266  of the wind deflector unit  210   a , extends over the entire length of the wind deflector unit  210   a . The wind deflector element  212   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , is of approximately triangular configuration. An enlarged outer face of the wind deflector element  212   a  in this plane is curved in a concave manner. A second outer face of the wind deflector element  212   a  in this plane is curved in a convex manner. Moreover, the wind deflector element  212   a  forms a hollow space  268   a . The hollow space  268   a  of the wind deflector element  212   a , viewed in the main direction of extent  266  of the wind deflector unit  210   a , extends over the entire length of the wind deflector element  212   a . The hollow space  268   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , has an outer contour which approximately corresponds to an outer contour of the wind deflector element  212   a  at a reduced scale. The outer contour of the hollow space  268   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , is similar to the outer contour of the wind deflector element  212   a.    
         [0043]    Moreover, the wind deflector unit  210   a  has a first coupling unit  214   a . The first coupling unit  214   a  adjoins directly the wind deflector element  212   a . The first coupling unit  214   a  adjoins the wind deflector element  212   a  in a direction perpendicular to a main extension plane  270  of a wiper stem  216  and perpendicular to a main direction of extent  266  of the wind deflector unit  210   a . Moreover, the first coupling unit  214   a  has a clip fastening element  224   a . The clip fastening element  224   a  has two fastening webs  272   a ,  272   a ′. The fastening webs  272   a ,  272   a ′ in each case are partially formed by latching elements. The fastening webs  272   a ,  272   a ′, viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , have in each case an L-shaped cross-sectional shape, wherein the two fastening webs  272   a ,  272   a ′ are mirror-symmetrical relative to one another. The freestanding ends of the L-shaped fastening webs  272   a ,  272   a ′ face one another in each case. The sides of the fastening webs  272   a ,  272   a ′ extend parallel to one another. The two fastening webs  272   a ,  272   a ′ are connected together at the ends remote from the freestanding ends, via a bottom side  274   a  of the clip fastening element  224   a  of the first coupling unit  214   a . The bottom side  274   a  extends perpendicular to the main extension plane  270  of the wiper stem  216 . The first fastening web  272   a  of the first coupling unit  214   a  adjoins directly the wind deflector element  212   a  and extends substantially parallel to the main extension plane  270  of the wiper stem  216 . 
         [0044]    The first coupling unit  214   a  also has a first receiving region  228   a . The first receiving region  228   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , is defined on four sides by the clip fastening element  224   a  of the first coupling unit  214   a . The first receiving region  228   a  is defined in one direction by the bottom side  274   a  of the clip fastening element  224   a . In three further directions, the first receiving region  228   a  is defined by the two fastening webs  272   a ,  272   a ′, wherein a gap  276   a  is arranged between the two freestanding ends of the two fastening webs  272   a ,  272   a ′. Via the gap  276   a , the wiper stem  216  of the wiper arm  218  is moved into the first receiving region  228   a . The gap  276   a  forms a first opening region  232   a  of the first receiving region  228   a . In a plane viewed perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , the gap  276   a , viewed from a central point of the first receiving region  228   a , is arranged in a direction parallel to the main extension plane  270  of the wiper stem  216  from the receiving region  228   a.    
         [0045]    Moreover, the wind deflector unit  210   a  has a second coupling unit  220   a . The second coupling unit  220   a  directly adjoins the wind deflector element  212   a  in a direction perpendicular to a main extension plane  270  of the wiper stem  216  and perpendicular to a main direction of extent  266  of the wind deflector unit  210   a . Moreover, the second coupling unit  220   a  directly adjoins the first coupling unit  214   a  in a direction parallel to a main extension plane  270  of the wiper stem  216  and perpendicular to a main direction of extent  266  of the wind deflector unit  210   a . The second coupling unit  220   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , is arranged on a side of the first coupling unit  214   a  facing the gap  276   a  of the first coupling unit  214   a . Moreover, the second coupling unit  220   a  has a clip fastening element  226   a . The clip fastening element  226   a  has two fastening webs  278   a ,  278   a ′. The fastening webs  278   a ,  278   a ′ in each case are formed partially from latching elements. The fastening webs  278   a ,  278   a ′, viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , have in each case a partially C-shaped cross-sectional shape, wherein the two fastening webs  278   a ,  278   a ′ are mirror-symmetrical relative to one another. The fastening webs  278   a ,  278   a ′ of the second coupling unit  220   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , are connected together on a side facing the first coupling unit  214   a , and thus form a partially circular inner contour. On a side remote from the first coupling unit  214   a , the two fastening webs  278   a ,  278   a ′ of the second coupling unit  220   a  form a gap  280   a . The first fastening web  278   a  of the second coupling unit  220   a  directly adjoins the wind deflector element  212   a.    
         [0046]    The second coupling unit  220   a , moreover, has a second receiving region  230   a . The second receiving region  230   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   a , is to a large extent defined by the clip fastening element  226   a  of the second coupling unit  220   a . The gap  280   a  between the fastening webs  278   a ,  278   a ′ of the second coupling unit  220   a  forms a second opening region  234   a  of the second receiving region  230   a.    
         [0047]    As a result, the first coupling unit  214   a  has the first receiving region  228   a  with the first opening region  232   a  and the second coupling unit  220   a  has the second receiving region  230   a  with the second opening region  234   a  differing from the first opening region  232   a . The first opening region  232   a  is arranged on a side of the first receiving region  228   a  remote from the second receiving region  230   a . Moreover, the second opening region  234   a  is arranged on a side of the second receiving region  230   a  remote from the first receiving region  228   a.    
         [0048]    Moreover, the wind deflector unit  210   a  preferably has two locking elements, not visible further. The first locking element is provided for securing the wind deflector unit  210   a  on the wiper stem  216  of the wiper arm  218 . The first locking element is provided to prevent inadvertent release of the wiper stem  216  of the wiper arm  218  from the first coupling unit  214   a . The second locking element is provided for securing the windshield wiper fluid duct  222  on the wind deflector unit  210   a . The second locking element is provided to prevent an inadvertent release of the windshield wiper fluid duct  222  from the second coupling unit  220   a . Different embodiments of the locking elements which appear expedient to the person skilled in the art are conceivable. 
         [0049]      FIG. 4  shows a second type of exemplary embodiment, wherein  FIG. 5  shows a first exemplary embodiment of the second type.  FIG. 6  shows a second exemplary embodiment of the second type, with an alternative design of wind deflector element of the wind deflector unit according to the invention, relative to  FIG. 5 . For differentiating between the exemplary embodiments of the second type the letter a is placed after the reference numerals of the first exemplary embodiment in  FIG. 5  which refer to the wind deflector unit. In the second exemplary embodiment in  FIG. 6 , the letter a is replaced by the letter b. 
         [0050]      FIG. 6  shows a wind deflector unit  210   b  according to the invention with an alternative wind deflector element  212   b  in a mounted state. The wind deflector unit  210   b  has the wind deflector element  212   b . The wind deflector element  212   b , viewed in a main direction of extent  266  of the wind deflector unit  210   b , extends over the entire length of the wind deflector unit  210   b . The wind deflector element  212   b  is formed by a curved wall. The wind deflector element  212   b , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   b , has a preferably uniform wall thickness. Moreover, the wind deflector element  212   b , viewed in the plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   b , is curved in a concave/convex manner. A front face of the wind deflector element  212   b  is, therefore, curved in a concave manner and a rear face is curved in a convex manner. Moreover, the wind deflector element  212   b , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  210   b , is angled back relative to a main extension plane  270  of a wiper stem  216 . 
         [0051]      FIG. 7  shows a wiper arm device  336  comprising a wind deflector unit  310   a ,  310   b  according to the invention, a wiper arm  318  and a wiper blade  338 . The wiper arm  318  has a wiper stem  316 . The wiper stem  316  has two wiper arm segments  342 ,  344  and a hinge  346 . The second wiper arm segment  344  has two recesses  382 . The recesses  382  are formed by through-bores. 
         [0052]      FIG. 8  shows the wind deflector unit  310   a  of the wiper arm device  336  with a wind deflector element  312   a  in a mounted state. The wiper arm device  336  has the wind deflector unit  310   a . The wind deflector unit  310   a  is formed by a wiper arm wind deflector unit. The wind deflector unit  310   a  has a wind deflector element  312   a . The wind deflector element  312   a , viewed in the main direction of extent  366  of the wind deflector unit  310   a , extends over the entire length of the wind deflector unit  310   a . The wind deflector element  312   a , viewed in a plane perpendicular to the main direction of extent  266  of the wind deflector unit  310   a , is of approximately triangular configuration. An enlarged outer face of the wind deflector element  312   a  is curved in this plane in a concave manner. A second outer face of the wind deflector element  312   a  is curved in this plane in a convex manner. Moreover, the wind deflector element  312   a  forms a hollow space  368   a . The hollow space  368   a  of the wind deflector element  312   a , viewed in the main direction of extent  366  of the wind deflector unit  310   a , extends over the entire length of the wind deflector element  312   a . The hollow space  368   a , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   a , has an outer contour which approximately corresponds to an outer contour of the wind deflector element  312   a  at a reduced scale. The outer contour of the hollow space  368   a , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   a , is similar to the outer contour of the wind deflector element  312   a.    
         [0053]    Moreover, the wind deflector unit  310   a  has a first coupling unit  314   a . The first coupling unit  314   a  directly adjoins the wind deflector element  312   a . The first coupling unit  314   a  adjoins the wind deflector element  312   a  in a direction perpendicular to a main extension plane  370  of the wiper stem  316 , and perpendicular to a main direction of extent  366  of the wind deflector unit  310   a . Moreover, the first coupling unit  314   a  has a screw fastening element  384   a . The screw fastening element  384   a  has two fastening webs  386   a ,  386   a ′ and two screws  388   a . The fastening webs  386   a ,  386   a ′ of the screw fastening element  384   a , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   a , in each case extend parallel to a main extension plane  370  of the wiper stem  316 . The two fastening webs  386   a ,  386   a ′ extend parallel to one another. Moreover, the two fastening webs  386   a ,  386   a ′ are connected together via a bottom side of the screw fastening element  384   a  of the first coupling unit  314   a . The bottom side extends perpendicular to the main extension plane  370  of the wiper stem  316 . The first fastening web  386   a  of the first coupling unit  314   a  directly adjoins the wind deflector element  312   a  and extends substantially parallel to the main extension plane  370  of the wiper stem  316 . Moreover, the first fastening web  386   a  of the screw fastening element  384   a  has two recesses  392   a . The recesses  392   a  are formed by through-bores. The second fastening web  386   a ′ has at the same position, displaced perpendicular to the main extension plane  370  of the wiper stem  316 , two threaded bores  394   a . For fastening the first coupling unit  314   a  to the wiper stem  316 , the screws  388   a  in each case may now be screwed through one respective recess  392   a  of the first fastening web  386   a  and through one respective recess  382  of the second wiper arm segment  344  of the wiper stem  316  into one respective threaded bore  394   a  of the second fastening web  386   a′.    
         [0054]    The first coupling unit  314   a  also has a first receiving region  328   a . The first receiving region  328   a , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   a , is defined on three sides by the screw fastening element  384   a  of the first coupling unit  314   a . The first receiving region  328   a  is defined in one direction by the bottom side of the screw fastening element  384   a . In two further directions, the first receiving region  328   a  is defined by the two fastening webs  386   a ,  386   a ′. The first receiving region  328   a  has an opening region  332   a  which faces in a direction parallel to the main extension plane  370  of the wiper stem  316  and perpendicular to the main direction of extent  366  of the wind deflector unit  310   a.    
         [0055]    Moreover, the wind deflector unit  310   a  has a second coupling unit  320   a . The second coupling unit  320   a  has a second receiving region  330   a.    
         [0056]    As a result, the first coupling unit  314   a  has the first receiving region  328   a  with the first opening region  332   a  and the second coupling unit  320   a  has the second receiving region  330   a  with the second opening region  334   a  differing from the first opening region  332   a . The first opening region  332   a  is arranged on a side of the first receiving region  328   a  remote from the second receiving region  330   a . Moreover, the second opening region  334   a  is arranged on a side of the second receiving region  330   a  remote from the first receiving region  328   a.    
         [0057]    Moreover, the wind deflector unit  310   a  preferably has a locking element, not visible further. The locking element is provided for securing the windshield wiper fluid duct  322  on the wind deflector unit  310   a . The locking element is provided to prevent an inadvertent release of the windshield wiper fluid duct  322  from the second coupling unit  320   a . Different embodiments of the locking element which appear expedient to the person skilled in the art are also conceivable. 
         [0058]      FIG. 7  shows a third type of exemplary embodiment, wherein  FIG. 8  shows a first exemplary embodiment of the third type.  FIG. 9  shows a second exemplary embodiment of the third type, with an alternative embodiment of the wind deflector element of the wind deflector unit according to the invention, relative to  FIG. 8 . To differentiate the exemplary embodiments of the third type, the letter a is placed after the reference numerals of the first exemplary embodiment in  FIG. 8  which relate to the wind deflector unit. In the second exemplary embodiment in  FIG. 9 , the letter a is replaced by the letter b. 
         [0059]      FIG. 9  shows a wind deflector unit  310   b  according to the invention with an alternative wind deflector element  312   b  in a mounted state. The wind deflector unit  310   b  has the wind deflector element  312   b . The wind deflector element  312   b , viewed in a main direction of extent  366  of the wind deflector unit  310   b , extends over the entire length of the wind deflector unit  310   b . The wind deflector element  312   b  is formed by a curved wall. The wind deflector element  312   b , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   b , has a uniform wall thickness. Moreover, the wind deflector element  312   b , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   b , is curved in a concave/convex manner. A front face of the wind deflector element  312   b  is, therefore, curved in a concave manner and a rear face is curved in a convex manner. Moreover, the wind deflector element  312   b , viewed in a plane perpendicular to the main direction of extent  366  of the wind deflector unit  310   b , is angled back relative to a main extension plane  370  of a wiper stem  316 .