Abstract:
The invention relates to a wiper blade device comprising at least one spring strip ( 10   a - e ), at least one wiper strip support ( 12   a - e ) and at least one end sealing unit ( 14   a - e ). According to the invention, the end sealing unit ( 14   a - e ) comprises at least two detent elements ( 16   a - e ,  18   a - e ) for fixing the spring strip ( 10   a - e ) and/or the wiper strip support ( 12   a - e ).

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The invention relates to a wiper blade device. 
         [0002]    A wiper blade device of a wiper blade for use on a motor vehicle is already known, comprising a spring strip, a wiper strip support and two end termination units. The end termination units are arranged at two ends of the spring strip and of the wiper strip support. 
       SUMMARY OF THE INVENTION 
       [0003]    The invention starts from a wiper blade device having at least one spring strip, at least one wiper strip support and at least one end termination unit. 
         [0004]    It is proposed that the end termination unit comprises at least two latching elements for fastening the spring strip and/or the wiper strip support. 
         [0005]    Here, the term “spring strip” is intended to mean, in particular, a component part which has at least one extent that can be changed elastically in a normal operating state 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 counterforce dependent on a change in the extent, which counterforce counteracts the change. In this context, the term “extent” of an element is intended, in particular, to mean a maximum distance between two points of a perpendicular projection of the element onto a plane. The spring strip is preferably of integral design. The term “integral” is intended, in particular, to mean materially connected, e.g. by means of a welding process and/or an adhesive bonding process etc., and particularly advantageously to mean formed on, as by being produced from a single molding and/or by being produced in a single- or multi-component injection molding process. The spring strip is preferably of elongate design. The spring strip is preferably composed at least partially of spring steel. In an unloaded state, the spring strip preferably has essentially the shape of a bent bar and, as a particularly advantageous possibility, of a flattened bent bar. As a particularly advantageous possibility, a curvature of the spring strip along a longitudinal extent in an unloaded state is greater than a curvature of a vehicle surface of a motor vehicle, in particular of a vehicle window over which the spring strip is guided in at least one operating state. The spring strip preferably has a latching element, in particular an aperture, which is in operative connection with at least one of the latching elements of the end termination unit in an assembled state. Here and below, the term “aperture” is intended, in particular, to mean an aperture in the material of a component extending, in particular, from a first surface of the component to an opposite second surface of the component. 
         [0006]    A “wiper strip support” is intended, in particular, to mean a unit which is provided for the purpose of fastening a wiper strip on the spring strip. The term “provided” is intended, in particular, to mean specifically designed and/or equipped. The term “wiper strip” is intended, in particular, to mean a unit which has a wiper lip and a holding region for holding the wiper lip on the wiper strip support. In this context, the term “wiper lip” is intended to mean an element which is moved over the vehicle surface, in particular the vehicle window, during operation of the wiper blade device, preferably touching the surface during a complete movement and, as a particularly advantageous possibility, being pressed as uniformly as possible against the vehicle surface, in particular by the spring strip. The wiper lip is preferably of integral design and is preferably composed of a natural rubber and, as a particularly advantageous possibility, of a synthetic rubber. The wiper strip support is preferably distinct from a spring strip and is designed as a separate component. The wiper strip support is preferably composed at least partially of rubber and/or of an at least partially flexible plastic. The wiper strip support preferably comprises a receiving region for receiving and fastening the holding region of the wiper strip. The wiper strip support preferably additionally comprises a receiving region for holding a spoiler unit. In this context, the term “spoiler unit” is intended, in particular, to mean a unit which is provided for the purpose of deflecting a relative wind acting on the wiper blade device and/or of using said wind to press the wiper lip onto the vehicle surface. The spoiler unit is preferably composed at least partially of rubber and/or of an at least partially flexible plastic. 
         [0007]    The term “end termination unit” is intended, in particular, to mean a unit which is provided for the purpose of being fastened on one end of the spring strip. In particular, the end termination unit is provided for the purpose of providing an end termination for a wiper blade comprising the wiper blade device in an assembled state. The end termination unit is preferably formed at least partially by a plastic. The end termination unit is preferably designed as an end cap, which engages around part of the spring strip, especially in at least one assembled state. The wiper blade device preferably comprises just two end termination units, one for each end of the spring strip. The term “latching element” is intended, in particular, to mean an element which is provided for the purpose of producing a latching connection in interaction with a further latching element. At least one of the latching elements is preferably embodied as a latching hook which, in particular, has a partial area that is moved in a direction perpendicular to the spring strip during a latching operation and/or changes an extent in a direction perpendicular to the spring strip. In this context, a direction “perpendicular to the spring strip” is intended, in particular, to mean a direction perpendicular to a longitudinal extent of the spring strip. 
         [0008]    By means of such an embodiment, advantageously stable retention of the end termination unit can be achieved. Thus, it is possible, in particular, to provide largely waggle-free fastening of the end termination unit on the spring strip and/or on the wiper strip support. 
         [0009]    In a preferred embodiment of the invention, it is proposed that the spring strip and the wiper strip support are fixed on the end termination unit by means of the latching elements. In this context, the phrase “the spring strip and the wiper strip support are fixed on the end termination unit by means of the latching elements” is intended, in particular, to mean that merely mounting the spring strip and the wiper strip support on the end termination unit by means of the latching elements is sufficient to connect the three components securely to one another. In particular, it is possible to eliminate the use of further components for fastening the spring strip and the wiper strip support on the end termination unit. In particular, the spring strip can be fixed on the end termination unit by means of the wiper strip support or, alternatively, the wiper strip support can be fixed on the end termination unit by means of the spring strip. The spring strip and the wiper strip support can furthermore each be fastened independently directly on the end termination unit. Advantageously simple assembly can thereby be made possible. Moreover, the number of components can be reduced. 
         [0010]    It is advantageous if the latching elements are formed on the end termination unit. The end termination unit together with the latching elements is preferably produced as a single molding. In this way, advantageously simple production of the end termination unit together with the latching elements can be made possible. 
         [0011]    It is furthermore proposed that at least one latching element is arranged in at least one side region of the end termination unit. The phrase “side region of the end termination unit” is intended, in particular, to mean a spatial region of the end termination unit, the principal plane of extent of which is arranged at least substantially perpendicular to the spring strip and, in particular, next to the spring strip in an assembled state. Here, a direction which is “at least substantially perpendicular” to a reference direction is intended, in particular, to mean a direction which is at an angle of between 80° and 100°, in particular between 85° and 95°, and preferably exactly 90°, to the reference direction. In this context, the statement that a spatial region is arranged “next to the spring strip” is intended, in particular, to mean that an infinite extension of the spring strip in the direction of an axis of curvature intersects the spatial region. The term “axis of curvature” of the spring strip is intended, in particular, to mean an axis which is perpendicular to an arbitrary surface normal of a largest smooth surface of the spring strip. As a preferred option, each of two latching elements is arranged on opposite side regions, in particular on opposite side walls, of the end termination unit. It is thereby advantageously possible to achieve largely waggle-free fastening of the spring rail and/or of the wiper strip support on the end termination unit. 
         [0012]    If at least one of the latching elements is designed as a latching hook, an advantageously simple design can be made possible since it is possible to provide only simple latching elements, preferably apertures, on the spring rail and/or on the wiper strip support. 
         [0013]    In another embodiment of the invention, it is proposed that the end termination unit has at least one aperture to increase flexibility of the latching hooks. The aperture is preferably embodied as a lateral notch, in particular as a slot-shaped notch, preferably in a side region of the end termination unit. This enables a partial area of the end termination unit, in particular a lateral partial area, to serve as a latching element, thereby making it possible to achieve an advantageously simple and low-cost design. 
         [0014]    If the end termination unit has a receiving region for the wiper strip, which region, in an assembled state, continues a receiving region, arranged on the wiper strip support, for the wiper strip, particularly simple retention can be achieved, especially in an end region of the wiper strip. 
         [0015]    It is furthermore proposed that the wiper strip support has at least one latching element for fastening the end termination unit. The latching element of the wiper strip support is preferably designed as an aperture, in particular as a lateral aperture, interacting, in particular, with the end termination unit latching element designed as a latching hook. It is thereby advantageously possible to simplify a design of the wiper strip support. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]    Further advantages will become apparent from the following description of the drawing. The drawing shows illustrative embodiments of the invention. The drawing, the descriptions and the claims contain numerous features in combination. A person skilled in the art will expediently also consider the features individually and combine them into worthwhile further combinations. 
           [0017]    In the drawing: 
           [0018]      FIG. 1  shows a wiper blade having a wiper blade device in a schematic illustration, 
           [0019]      FIG. 2  shows the wiper blade device from  FIG. 1  in a section along a line II-II in  FIG. 1 , 
           [0020]      FIG. 3  shows an end termination unit of the wiper blade device from  FIG. 1  in a sectional view, 
           [0021]      FIG. 4  shows the end termination unit and a spring strip of the wiper blade device from  FIG. 1  in a sectional view, 
           [0022]      FIG. 5  shows the end termination unit and the spring strip of the wiper blade device from  FIG. 1  in another sectional view, 
           [0023]      FIG. 6  shows the spring strip of the wiper blade device from  FIG. 1  in a plan view, 
           [0024]      FIG. 7  shows the end termination unit and a wiper strip support of the wiper blade device from  FIG. 1  in a plan view from below, 
           [0025]      FIG. 8  shows the wiper strip support of the wiper blade device from  FIG. 1  in a plan view, 
           [0026]      FIG. 9  shows the wiper blade device from  FIG. 1  in a sectional view along a line IX-IX in  FIG. 2 , 
           [0027]      FIG. 10  shows another wiper blade device in a sectional view, 
           [0028]      FIG. 11  shows an end termination unit, a spring strip and a wiper strip support of the wiper blade device from  FIG. 10  in an isometric sectional view, 
           [0029]      FIG. 12  shows the wiper strip support of the wiper blade device from  FIG. 10  in a plan view, 
           [0030]      FIG. 13  shows the spring strip and the wiper strip support of the wiper blade device from  FIG. 10  in an unassembled state in a sectional view, 
           [0031]      FIG. 14  shows the wiper blade device from  FIG. 10  in a sectional view along a line XIV-XIV in  FIG. 10 , 
           [0032]      FIG. 15  shows another wiper blade device in a sectional view, 
           [0033]      FIG. 16  shows an end termination unit of the wiper blade device from  FIG. 15  in a sectional view, 
           [0034]      FIG. 17  shows the end termination unit and a spring strip of the wiper blade device from  FIG. 15  in an isometric view from below, 
           [0035]      FIG. 18  shows the end termination unit, the spring strip and a wiper strip support of the wiper blade device from  FIG. 15  in an isometric view from below, 
           [0036]      FIG. 19  shows the wiper strip support of the wiper blade device from  FIG. 15  in a plan view, 
           [0037]      FIG. 20  shows the wiper blade device from  FIG. 15  in a sectional view along a line XX-XX in  FIG. 15 , 
           [0038]      FIG. 21  shows an end termination unit and a spring strip of another wiper blade device in an isometric view from below, 
           [0039]      FIG. 22  shows the end termination unit, the spring strip and a wiper strip support of the wiper blade device from  FIG. 21  in an isometric view from below, 
           [0040]      FIG. 23  shows the spring strip of the wiper blade device from  FIG. 21  in a plan view, 
           [0041]      FIG. 24  shows the wiper strip support of the wiper blade device from  FIG. 21  in a plan view, 
           [0042]      FIG. 25  shows another wiper blade device in a sectional view, and 
           [0043]      FIG. 26  shows an end termination unit and a spring strip of the wiper blade device from  FIG. 25  in an isometric sectional view. 
       
    
    
     DETAILED DESCRIPTION 
       [0044]      FIG. 1  shows schematically a wiper blade  46   a  having a wiper blade device according to the invention. The wiper blade  46   a  has an adapter  48   a , which is provided for mounting the wiper blade  46   a  on a wiper arm  50   a , depicted in dashed lines, of a window wiper system of a motor vehicle. 
         [0045]      FIG. 2  shows the wiper blade device in a sectional view along a line II-II in  FIG. 1 . The wiper blade device comprises a spring strip  10   a  of spring steel extended lengthwise in the form of a strip and curved. The wiper blade device furthermore has a wiper strip support  12   a  composed of a flexible plastic, a wiper strip  38   a  composed of a synthetic rubber, and a spoiler unit  52   a  composed of a partially flexible plastic. As can be seen from  FIG. 1 , the wiper strip support  12   a , the wiper strip  38   a  and the spoiler unit  52   a  are of elongate design and are arranged parallel to the spring strip  10   a  in an assembled state. The spring strip  10   a  is provided for the purpose of pressing a wiper lip  54   a  of the wiper strip  38   a  in a largely uniform manner against a surface to be wiped during operation of the window wiper system. For this purpose, a curvature of the spring strip  10   a  is designed in such a way that, in an unloaded state, it is greater than a maximum curvature occurring on the surface to be wiped. The wiper strip support  12   a  is provided for the purpose of connecting the wiper strip  38   a  securely to the spring strip  10   a  and transmitting any side forces which occur during wiping from the wiper strip  38   a  to the spring strip  10   a . The spoiler unit  52   a  ensures an increased contact pressure of the wiper blade  46   a  on the surface and prevents the wiper blade  46   a  from lifting off from the surface owing to the relative wind when the motor vehicle is moving quickly. The wiper blade  46   a  is closed off at both ends by an end termination unit  14   a  of the wiper blade device. In this arrangement, the end termination unit  14   a , which is designed as an end cap, in each case receives end regions of the spring strip  10   a , of the wiper strip support  12   a  and of the spoiler unit  52   a  (cf.  FIG. 9 ). 
         [0046]    According to  FIG. 2 , the wiper strip support  12   a  has an at least substantially rectangular form when viewed in cross section, wherein a receiving region  40   a  for a support element  56   a  of the wiper strip  38   a  is arranged on a rectangle side  58   a  of a rectangle which faces the wiper strip  38   a  in an assembled state. The receiving region  40   a  is bounded by two hook-type extensions  60   a  and by the rectangle side  58   a . The rectangle surrounds a receiving region  62   a  for the spring strip  10   a . When viewed in cross section, the spoiler unit  52   a  has at least substantially the shape of an isosceles triangle (cf. FIG.  2 ). Triangle sides  64   a  of the triangle are extended beyond a base side  66   a  of the triangle and, in an assembled state, engage positively around an edge region of the wiper strip support  12   a . In this region, a surface of the wiper strip support  12   a  is matched to a surface of the spoiler unit  52   a . In order to improve their wind-guiding properties, the triangle sides  64   a  have a slightly concave curvature when viewed from the outside. 
         [0047]      FIG. 3  shows the end termination unit  14   a  in an unassembled state in a sectional view from the side. The end termination unit  14   a  is composed of an at least partially flexible plastic. The end termination unit  14   a  comprises a latching element  20   a  for fastening the spring strip  10   a . The end termination unit  14   a  additionally comprises two further latching elements  16   a ,  18   a  (cf.  FIG. 5 ) for fastening the wiper strip support  12   a . The latching elements  16   a ,  18   a ,  20   a  are designed as latching hooks  26   a ,  28   a ,  30   a  and are formed integrally on the end termination unit  14   a . The latching elements  16   a ,  18   a  for fastening the wiper strip support  12   a  are each arranged in a side region  22   a ,  24   a  of the end termination unit  14   a , more specifically in mutually opposite side regions  22   a ,  24   a  of the end termination unit  14   a . Both the spring strip  10   a  and the wiper strip support  12   a  are fixed directly on the end termination unit  14   a  by the latching elements  16   a ,  18   a ,  20   a . Latching hook  30   a  comprises a spring web  68   a , which, at a first end, is formed on an end face of the end termination unit  14   a  and, at a second end, merges into a latching body  69   a . The latching body  69   a  has a run-on bevel  70   a . On a side remote from the run-on bevel  70   a , the latching body  69   a  has a latching surface  72   a . The latching surface  72   a  has a surface normal which lies parallel to a principal plane of extent of the spring strip  10   a  in the end region thereof in an assembled state. The lateral latching hooks  26   a ,  28   a  are designed as wings projecting from a side wall of the end termination unit  14   a . Latching hooks  26   a ,  28   a  each have a latching surface  74   a ,  76   a.    
         [0048]      FIG. 4  shows the end termination unit  14   a  with the spring strip  10   a  mounted, in a sectional view, wherein the wiper strip support  12   a , the wiper strip  38   a  and the spoiler unit  52   a  are not shown in  FIG. 4  for the sake of greater clarity. Once the latching connection has been established, latching hook  30   a  engages in a latching aperture  78   a  in the spring strip  10   a  (cf.  FIG. 6 ). In the present example, the latching aperture  78   a  is of circular design. As the spring strip  10   a  is being mounted on the end termination unit  14   a , the spring strip  10   a  is introduced along guide strips  80   a  of the end termination unit  14   a  (cf.  FIG. 5 ). By means of the run-on bevel  70   a , latching hook  30   a  is deformed elastically as the spring strip  10   a  is introduced and, finally, snaps into the latching aperture  78   a  when the latching aperture  78   a  of the spring strip  10   a  and the latching body  69   a  are arranged one above the other. Once the latching connection has been established, the spring strip  10   a  is prevented from being pulled out of the end termination unit  14   a  since the latching surface  72   a  of latching hook  30   a  is in operative connection with a corresponding surface of the spring strip  10   a  bounding the latching aperture  78   a  (cf.  FIG. 4 ). 
         [0049]      FIG. 7  shows the end termination unit  14   a  with the wiper strip support  12   a  mounted in a plan view from below, wherein the spring strip  10   a , the wiper strip  38   a  and the spoiler unit  52   a  are not shown for the sake of greater clarity. The wiper strip support  12   a  comprises two latching elements  42   a ,  44   a  in the form of two latching apertures  82   a ,  84   a , corresponding to the two latching hooks  26   a ,  28   a , for fastening the end terminal unit  14   a . The latching apertures  82   a ,  84   a  are designed as lateral apertures in the wiper strip support  12   a  (cf.  FIG. 8 ). 
         [0050]    Owing to the latching apertures  82   a ,  84   a , a cross section of the wiper strip support  12   a  deviates from the above-described largely rectangular cross section in the region of the apertures  82   a ,  84   a . Owing to the latching apertures  82   a ,  84   a , the receiving region  62   a  for the spring strip  10   a  is open at the sides. As the wiper strip support  12   a  is introduced into the end termination unit  14   a , latching hooks  26   a ,  28   a , which are designed as wings, are deformed elastically by the wiper strip support  12   a  and come to rest on the side walls of the end termination unit  14   a . As soon as the latching apertures  82   a ,  84   a  are arranged above latching hooks  26   a ,  28   a , latching hooks  26   a ,  28   a  return to the normal position thereof. Once the latching connection has been established, the latching surfaces  74   a ,  76   a  of latching hooks  26   a ,  28   a  thus rest on corresponding surfaces bounding the latching apertures  82   a ,  84   a  and, in this way, prevent the wiper strip support  12   a  from being pulled out of the end termination unit  14   a . According to  FIG. 7 , the end termination unit  14   a  has a receiving region  36   a  for the wiper strip  38   a , which region, in an assembled state, continues the receiving region  40   a  arranged on the wiper strip support  12   a . It is thereby possible to achieve secure retention of the wiper strip  38   a , particularly in an end region of the wiper strip  38   a.    
         [0051]      FIG. 9  shows the wiper blade device in a sectional view along a line IX-IX in  FIG. 2 . A position of the spoiler unit  52   a  parallel to the spring strip  10   a  is defined by abutment of the spoiler unit  52   a  against a stop edge  86   a  of the end termination unit  14   a . In an inner region, the end termination unit  14   a  is shaped in such a way that the wiper strip support  12   a  with the spoiler unit  52   a  mounted thereon fits positively into the end termination unit  14   a  (cf.  FIG. 2 ). Use can be made here, in particular, of additional spacer webs, it being possible to provide these, in particular, to compensate for manufacturing and/or assembly tolerances. 
         [0052]    Four further illustrative embodiments of the invention are shown in  FIGS. 10 to 26 . The descriptions below are limited essentially to the differences between the illustrative embodiments, it being possible to refer to the description of the other illustrative embodiments, in particular  FIGS. 1 to 9 , in respect of components, features and functions which remain the same. To distinguish the illustrative embodiments, the letter a in the reference signs for the illustrative embodiment in  FIGS. 1 to 9  is replaced by the letters b, c, d and e in the reference signs for the illustrative embodiments in  FIGS. 10 to 26 . In respect of components designated in the same way, especially in respect of components with the same reference signs, reference can basically also be made to the figures and/or to the descriptions of the other illustrative embodiments, in particular to  FIGS. 1 to 9 . 
         [0053]      FIG. 10  shows another wiper blade device. Here, a wiper strip support  12   b  has a similar shape to that in the previous illustrative embodiment, when viewed in cross section. However, instead of a spoiler unit  52   b  engaging around the wiper strip support  12   b  to establish a positive connection, two holding strips  88   b  are here formed on a rectangle side opposite to a rectangle side  58   b , said holding strips  88   b  engaging in corresponding holding grooves  90   b  of the spoiler unit  52   b . When viewed in cross section, the spoiler unit  52   b  has at least substantially the shape of an isosceles triangle. The holding grooves  90   b  are formed on the respective ends, facing a base side  66   b , of triangle sides  64   b.    
         [0054]      FIG. 11  shows an isometric sectional view of an end termination unit  14   b  with a mounted spring strip  10   b  and the mounted wiper strip support  12   b  along a line XI-XI in  FIG. 10 , wherein the spoiler unit  52   b  and a wiper strip  38   b  are not shown in  FIG. 11  for the sake of clarity. The end termination unit  14   b  has two latching elements  16   b ,  18   b , which are designed as latching hooks  26   b ,  28   b  and are each arranged in a side region  22   b ,  24   b  of the end termination unit  14   b . The latching hooks  26   b ,  28   b  are formed on a base of the end termination unit  14   b , said base facing the wiper strip  38   b  in an assembled state. When the base is viewed from the side, the latching hooks  26   b ,  28   b  have a solid, triangular shape. The latching hooks  26   b ,  28   b  comprise a run-on bevel and a latching surface  74   b ,  76   b  on a side of the latching hooks  26   b ,  28   b  which faces away from the run-on bevel. As in the previous illustrative embodiment, the wiper strip support  12   b  has two lateral latching apertures  82   b ,  84   b  corresponding to the latching hooks  26   b ,  28   b  (cf.  FIG. 12 ). As the wiper strip support  12   b  is being mounted on the end termination unit  14   b , the latching hooks  26   b ,  28   b  and also parts of the base are deformed elastically by insertion of the wiper strip support  12   b . As soon as the latching hooks  26   b ,  28   b  are arranged above the latching apertures  82   b ,  84   b , the latching hooks  26   b ,  28   b  and the base return to the initial position thereof. Once the latching connection has been established, the latching surfaces  74   b ,  76   b  of the latching hooks  26   b ,  28   b  thus rest on corresponding surfaces bounding the latching apertures  82   b ,  84   b  and in this way prevent the wiper strip support  12   b  from being pulled out of the end termination unit  14   b.    
         [0055]      FIG. 13  shows a sectional view of the wiper strip support  12   b  with the spring strip  10   b  inserted. It is clearly apparent how a receiving region  62   b  for the spring strip  10   b  is open at the sides in the region of the latching apertures  82   b ,  84   b  by virtue of the latching apertures  82   b ,  84   b .  FIG. 14  shows the wiper blade device in a sectional view along a line XIV-XIV in  FIG. 10 . 
         [0056]      FIG. 15  shows another embodiment of a wiper blade device. When viewed in cross section, a wiper strip support  12   c  has an at least substantially H-shaped form. When viewed in cross section, ends of the wiper strip support  12   c  are bent around to form receiving regions  40   c ,  62   c  and holding strips  88   c . Receiving region  40   c  is provided to receive a support element  56   c  of a wiper strip  38   c . Region  62   c  is provided to reveice a spring strip  10   c . The holding strips  88   c  are provided for holding a spoiler unit  52   c . Receiving region  40   c  is formed on a part of the H-shaped cross section of the wiper strip support  12   c  which faces the wiper strip  38   c . When viewed in cross section, the lower H legs  92   c  of the wiper strip support  12   c  which face the wiper strip  38   c  are bent around toward one another. In an end region, the lower H legs  92   c  of the wiper strip support  12   a  are aligned parallel to one another and parallel to an H beam  94   c . A cavity open in the direction of the wiper strip  38   c  is thereby formed, into which cavity the support element  56   c  of the wiper strip  38   c  fits positively. Receiving region  62   c  and the holding strips  88   c  are formed on a part of the H-shaped cross section of the wiper strip support  12   a  which faces the spoiler unit  52   c . From the H beam  94   c , the upper H legs  96   c , which face the spoiler unit  52   c , initially extend outward on both sides parallel to the H beam  94   c  and are then bent over at right angles in a direction toward the spoiler unit  52   c . After covering a distance corresponding to the thickness of the spring strip  10   c , the upper H legs  96   c  are once again bent over at right angles, more specifically toward one another. After covering a further distance, the upper H legs  96   c  are once again redirected through 90° in a direction away from the H beam  94   c . After covering a further distance, the upper H legs  96   c  are bent over outward at right angles in a direction away from a center of gravity of the area of the cross section of the wiper strip support  12   c . A cavity, which is open toward the spoiler unit  52   c , is formed directly above the H beam  94   c , into which cavity the spring strip  10   c  fits positively. The folded-over ends of the upper H legs  96   c  form the holding strips  88   c , which engage in corresponding holding grooves  90   c  of the spoiler unit  52   c.    
         [0057]    When viewed in cross section, the spoiler unit  52   c  has at least substantially the form of an isosceles triangle (cf.  FIG. 15 ). Triangle sides  64   c  of the triangle are extended beyond a base side  66   c  of the triangle and there have the holding grooves  90   c . In a region of the holding grooves  90   c , the spoiler unit  52   c  is composed of a harder plastic in comparison with the remaining regions of the spoiler unit  52   c . It is thereby possible to ensure secure retention of the holding grooves  90   c  on the holding strips  88   c  of the wiper strip support  12   c . There is furthermore the possibility of simplifying the pushing of the spoiler unit  52   c  onto the wiper strip support  12   c  during assembly of a wiper blade  46   c . To improve the wind guiding properties of the triangle sides  64   c , they have a slightly concave curvature when viewed from the outside. 
         [0058]      FIG. 16  shows a sectional view of an end termination unit  14   c  in a disassembled state. The end termination unit  14   c  has guide strips  80   c . The guide strips  80   c  are formed on mutually opposite side walls of the end termination unit  14   c  and are provided for the purpose of guiding the spring strip  10   c . Two latching elements  16   c ,  18   c  designed as latching hooks  26   c ,  28   c  are formed integrally on the end termination unit  14   c . The latching hooks  26   c ,  28   c  are formed on mutually opposite side walls of the end termination unit  14   c . The latching hooks  26   c ,  28   c  each comprise a spring web  68   c  and latching bodies  69   c  adjoining the spring web  68   c . The latching bodies  69   c  are designed as flat plates which continue the guide strips  80   c . The latching bodies  69   c  each have a run-on bevel  70   c  facing the spring strip  10   c  in an assembled state. In a direction away from the run-on bevels  70   c , the latching bodies  69   c  each have a latching surface  74   c ,  76   c . The end termination unit  14   c  furthermore comprises respective apertures  32   c ,  34   c  adjacent to the latching hooks  26   c ,  28   c  to increase flexibility of the latching hooks  26   c ,  28   c . The apertures  32   c ,  34   c  are formed by lateral notches in the end termination unit  14   c.    
         [0059]      FIG. 17  shows the end termination unit  14   c  with the spring strip  10   c  installed in an isometric view obliquely from below, wherein the wiper strip support  12   c , the wiper strip  38   c  and the spoiler unit  52   c  are not shown in  FIG. 17  for the sake of greater clarity. In the illustrative embodiment under consideration, the spring strip  10   c  is free of any latching elements. During assembly, the spring strip  10   c  is introduced in the direction defined by the latching bodies  69   c  and the guide strips  80   c . As shown in  FIG. 18 , the wiper strip support  12   c  is then pushed onto the spring strip  10   c . In this illustrative embodiment too, the wiper strip support  12   c  has two lateral latching apertures  82   c ,  84   c  interacting with the latching hooks  26   c ,  28   c  (cf.  FIG. 19 ). By pushing the wiper strip support  12   c  on against the run-on bevels  70   c  of the latching bodies  69   c , said bodies are spread elastically, allowing the wiper strip support  12   c  to be accommodated between the latching bodies  69   c . As soon as the latching bodies  69   c  are arranged above the latching apertures  82   c ,  84   c , the latching hooks  26   c ,  28   c  snap back into the initial position thereof. Once the latching connection has been established, the latching surfaces  74   c ,  76   c  of the latching bodies  69   c  rest on corresponding surfaces bounding the latching apertures  82   c ,  84   c  and, in this way, prevent the wiper strip support  12   c  from being pulled out of the end termination unit  14   c.    
         [0060]      FIG. 20  shows the wiper blade device in a sectional view along a line XX-XX in  FIG. 15 . A position of the spoiler unit  52   c  parallel to the spring strip  10   c  is defined by abutment of the spoiler unit  52   c  against an outer wall of the end termination unit  14   c . In an inner region, the end termination unit  14   c  is shaped in such a way that the wiper strip support  12   c  with the spoiler unit  52   c  mounted thereon fits positively into the end termination unit  14   c  (cf.  FIG. 15 ). Use can be made here, in particular, of additional spacer webs of the kind indicated, in particular, in  FIGS. 15 and 20  by spacings shown between the end termination unit  14   c  and the wiper strip support  12   c  and between the end termination unit  14   c  and the spoiler unit  52   c . The spacer webs can be provided, in particular, to compensate for manufacturing and/or assembly tolerances. 
         [0061]    In the illustrative embodiment under consideration, the spring strip  10   c  is connected to the end termination unit  14   c  in a manner which allows movement in a direction parallel to the principal direction of extent of the spring strip  10   c . The spring strip  10   c  is fixed in the direction parallel to the principal direction of extent only by additional abutment on an adapter  48   c  and/or on a further end termination unit  14   c  at a second end of the spring strip  10   c.    
         [0062]      FIG. 21  shows a modification of the previous illustrative embodiment, in which a spring strip  10   d  is fixed directly in a secure manner on an end termination unit  14   d .  FIG. 21  shows the end termination unit  14   d  with the spring strip  10   d  mounted thereon in an isometric sectional view obliquely from below, wherein a wiper strip support  12   d , a wiper strip  38   d  and a spoiler unit  52   d  are not shown for the sake of greater clarity. In the illustrative embodiment under consideration, lateral latching apertures  78   d  are provided on the spring strip  10   d  (cf.  FIG. 23 ). Latching bodies  69   d  of latching hooks  26   d ,  28   d  are designed in such a way that the latching hooks  26   d ,  28   d  are deformed elastically even as the spring strip  10   d  is pushed in. Once the latching connection has been established, latching surfaces  74   d ,  76   d  of the latching bodies  69   d  interact with corresponding surfaces of the spring strip  10   d  which bound the latching apertures  78   d , thereby preventing the spring strip  10   d  from being pulled out of the end termination unit  14   d . The wiper strip support  12   d  is latched to the end termination unit  14   d  in a manner similar to that in the previous illustrative embodiment (cf.  FIGS. 22 and 24 ). 
         [0063]      FIG. 25  shows another wiper blade device according to the invention. Two latching elements  16   e ,  18   e  designed as latching hooks  26   e ,  28   e  are formed on two mutually opposite side walls of an end termination unit  14   e . When viewed perpendicularly to a principal plane of extent of a spring strip  10   e  in an assembled state, the latching hooks  26   e ,  28   e  have largely the shape of right angled triangles in their end region (cf.  FIG. 26 ). A surface forming a hypotenuse of the right angled triangles in this view in each case forms a run-on bevel  70   e . A surface forming a shorter side of the right angled triangles in said view in each case forms a latching surface  74   e ,  76   e . The spring strip  10   e  has two lateral, mutually opposite latching apertures  78   e . During mounting of the spring strip  10   e  on the end termination unit  14   e , the latching hooks  26   e ,  28   e  are deformed elastically by a movement of the spring strip  10   e  along the run-on bevels  70   e . As soon as the latching hooks  26   e ,  28   e  are arranged above the latching apertures  78   e , the latching hooks  26   e ,  28   e  return to their original shape. Once the latching connection has been established, the latching surfaces  74   e ,  76   e  of the latching hooks  26   e ,  28   e  rest on corresponding surfaces bounding the latching apertures  78   e  and, in this way, prevent the spring strip  10   e  from being pulled out of the end termination unit  14   e . In the illustrative embodiment under consideration, a wiper strip support  12   e  is merely pushed onto the spring strip  10   e . The wiper strip support  12   e  is connected to the end termination unit  14   e  in a manner which allows movement in a direction parallel to the principal direction of extent of the spring strip  10   e . The wiper strip support  12   e  is fixed in the direction parallel to the principal direction of extent merely by additional abutment on an adapter  48   e  and/or on a further end termination unit  14   e  at a second end of the spring strip  10   e.    
         [0064]    A position of the spring strip  10   e  within the end termination unit  14   e  perpendicular to the spring strip  10   e  is defined by stops formed by the wiper strip support  12   e  and a spoiler unit  52   e . In an inner region, the end termination unit  14   e  is shaped in such a way that the wiper strip support  12   e  with the spoiler unit  52   e  mounted thereon fits positively into the end termination unit  14   e  (cf.  FIG. 25 ). Use can be made here, in particular, of additional spacer webs of the kind indicated, in particular, in  FIG. 25  by spacings shown between the end termination unit  14   e  and the wiper strip support  12   e  and between the end termination unit  14   e  and the spoiler unit  52   e . The spacer webs can be provided, in particular, to compensate for manufacturing and/or assembly tolerances.