Abstract:
In a wiper blade ( 100 ) for a windscreen wiper, having a wiper strip ( 112 ) and an adapter unit ( 105 ) for hinging the wiper blade ( 112 ) to a wiper arm, wherein the adapter unit ( 150 ) is attached at a base connection device ( 160 ) provided on the wiper strip ( 112 ) and is configured for connection to a connection member associated with the wiper arm. The adapter unit ( 150 ) comprises a guide adapter ( 250 ) permanently connected to the base connection device ( 160 ) and having guide elements ( 352, 354, 356, 358 ) that are spherically curved at least in sections. The guide adapter is detachably connected to a function adapter ( 280 ) configured for connection to the connection member and comprising slide elements ( 382, 386 ) that are slidably displaceable on the guide elements ( 352, 354, 356, 358 ) such that the function adapter ( 280 ) is movable at least from a released position into a holding position by a combined translatory and rotary movement relative to the guide adapter ( 250 ).

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a wiper blade for a window wiper, with a wiper strip and an adapter unit for attachment of the wiper strip to a wiper arm, wherein the adapter unit is fastened to a base connecting device provided on the wiper strip and is designed for connection to a connecting member assigned to the wiper arm. 
     WO 2008/145481 A1 describes a wiper blade of this type, in which an adapter unit is fastened by means of a snap-in connection to a base connecting device. For this purpose, the adapter unit has two snap-in pegs with widened, circular-arc-shaped ends, and the base connecting device has two associated snap-in retainers with elastic retaining arms, wherein in each case two retaining arms, with a circular-arc-shaped indentation, form a snap-in retainer. During the fastening of the adapter unit to the base connecting device, the adapter unit is initially mounted with a front axial end region on the base connecting device at a predefined angle, and is then turned with its rear axial end region in the direction of the base connecting device until the snap-in pegs bear against the snap-in retainers. The snap-in pegs are then pressed against the associated snap-in retainers, wherein the circular-arc-shaped ends of the snap-in pegs initially bend the elastic retaining arms of the associated snap-in retainer apart before then engaging into the corresponding circular-arc-shaped indentations. Here, the retaining arms spring back into their initial position and surround the circular-arc-shaped ends, which engage into the circular-arc-shaped indentations, of the snap-in pegs. 
     A disadvantage of said prior art is that, for example if the adapter unit becomes jammed on the base connecting device during the mounting process, the pressure subsequently to be exerted during the rotational movement to produce the snap-in connection may cause damage to or destruction of individual components of the adapter unit or of the base connecting device. 
     EP 2 020 351 A1 likewise describes a wiper blade with a wiper strip on which is provided a base connecting device which can be connected to an adapter unit. The adapter unit has linear sliding elements which are displaceable in a sliding fashion in associated longitudinal grooves of the base connecting device. To fasten the adapter unit to the base connecting device, the sliding elements are inserted into the longitudinal grooves, and the adapter unit is pushed with a translational movement onto the base connecting device and latched to the latter by means of latching elements assigned to the base connecting device. 
     A disadvantage of said prior art is that, during the fastening of the adapter unit to the base connecting device, precise insertion of the sliding elements into the longitudinal grooves is necessary because the adapter unit may otherwise become jammed on the base connecting device during the subsequent translational movement. If, in the event of such jamming, an excessively high pressure is exerted to continue the translational movement, this may lead to damage to or destruction of the adapter unit or of the base connecting device. 
     SUMMARY OF THE INVENTION 
     It is therefore the object of the invention to provide a novel wiper blade for a window wiper, which wiper blade has an adapter unit which is easy to handle and which can be fastened quickly and securely to a base connecting device provided on a wiper strip. 
     This problem is solved by a wiper blade for a window wiper, with a wiper strip and an adapter unit for attachment of the wiper strip to a wiper arm, wherein the adapter unit is fastened to a base connecting device provided on the wiper strip and is designed for connection to a connecting member assigned to the wiper arm. The adapter unit has a guide adapter which is fastened permanently to the base connecting device and which has guide elements which are designed to be at least partially three-dimensionally curved. Said function adapter has sliding elements which are displaceable in a sliding fashion on the guide elements in such a way that the function adapter can, by a combined translational and rotational movement relative to the guide adapter, be moved at least from a release position into a retaining position. 
     The invention thus makes it possible to provide a wiper blade with an adapter unit that can be mounted in a simple manner. 
     The guide elements are preferably at least partially of elongated S-shaped design. 
     It is thereby possible to provide a guide adapter with guide elements which are of simple and uncomplicated design. 
     The guide elements and the sliding elements are preferably formed with a substantially identical shaping. 
     Secure and reliable guidance of the function adapter on the guide adapter can thereby be ensured. 
     The guide adapter preferably has at least one actuable latching element which, in the retaining position, is latched releasably to the function adapter, wherein the latching can be released by actuation of the latching element. 
     The invention therefore permits secure and stable fastening of the function adapter to the guide adapter. 
     The guide adapter is preferably permanently latched to the base connecting device by a snap-in connection, wherein retaining arms are provided on the guide adapter, which retaining arms are interlocked on associated retaining indentations of the base connecting device. 
     Simple and fast fastening of the guide adapter to the base connecting device can thereby be attained. 
     The guide adapter preferably has pocket-like receiving elements into which associated projections of the base connecting device engage. 
     It is thereby possible to permit precise and fast positioning of the guide adapter on the base connecting device during assembly. 
     In one embodiment, the connecting member has a fastening member which can be mounted on the function adapter. 
     The invention therefore makes it possible for the wiper blade to be fastened simply and securely to a corresponding wiper arm. 
     The fastening member is preferably designed for attachment to a first multiplicity of different wiper arm types. 
     It is thereby possible, through the provision of one simple and cheap fastening member, for the wiper blade to be attached to a plurality of different wiper arms. 
     The fastening member can preferably be connected to an adapter element which is designed for attachment to a second multiplicity of different wiper arm types which differ from the wiper arm types of the first multiplicity of wiper arm types. 
     It is thereby possible, through the provision of one simple and cheap additional element, that is to say the adapter element, for the wiper blade to be attached to an even greater number of different wiper arms. 
     The adapter element engages at least partially around the fastening member in a claw-like manner. 
     Secure and stable fastening of the adapter element to the fastening member can thereby be ensured. 
     In one embodiment, the connecting member has a cover member by means of which at least a plurality of different wiper arm types can be fixed to the connecting member. 
     The invention therefore permits simple and reliable fixing of the wiper blade to a corresponding wiper arm. 
     The cover member can preferably be fastened to the fastening member by means of a snap-in connection. 
     The cover member can thereby be fastened in a secure and stable manner to the fastening member. 
     In one embodiment, the function adapter has a bearing element on which the connecting member can be mounted. 
     The invention therefore permits simple and uncomplicated mounting of the connecting member on the function adapter. 
     The bearing element has at least two wall elements aligned parallel to each other for at least partially laterally supporting the connecting member. 
     Lateral slippage of the connecting member on the function adapter can thereby be prevented in a simple manner. 
     The problem stated in the introduction is also solved by means of an adapter unit for attachment of a wiper strip, which is assigned to a wiper blade for a window wiper, to a wiper arm. The adapter unit can be fastened to a base connecting device provided on the wiper strip and is designed for connection to a connecting member assigned to a wiper arm. The adapter unit has a guide adapter which is fastened permanently to the base connecting device and which has guide elements which are designed to be at least partially three-dimensionally curved, which guide adapter is connected releasably to a function adapter designed for connection to the connecting member. Said function adapter has sliding elements which are displaceable in a sliding fashion on the guide elements in such a way that the function adapter can, by a combined translational and rotational movement relative to the guide adapter, be moved at least from a release position into a retaining position. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention is explained in more detail in the description below with reference to exemplary embodiments which are illustrated in the drawings, in which: 
         FIG. 1  shows a side view of a wiper blade, with a wiper strip, to which a base connecting device is fastened, and with an adapter unit which is fastened to the latter and is fastened to a connecting member assigned to a wiper arm, according to the invention, 
         FIG. 2  shows a perspective view of a detail II of the wiper blade from  FIG. 1  in the fitted state, according to an embodiment, 
         FIG. 3  shows a perspective view of the wiper blade detail from  FIG. 2 , with the wiper strip provided with the base connecting device and with the adapter unit provided with a guide and a function adapter, according to a first embodiment, in the unfitted state, 
         FIG. 4  shows a perspective view of a lower side of the guide adapter from  FIG. 3 , 
         FIG. 5  shows a perspective, partially transparent view of the function adapter from  FIG. 3 , 
         FIG. 6  shows a perspective view of the wiper blade detail from  FIG. 2  during installation of the adapter unit from  FIG. 3 , 
         FIG. 7  shows a perspective view of the connecting member from  FIG. 1  according to the first embodiment, 
         FIG. 8  shows a perspective view of the wiper blade detail from  FIG. 2  during installation of the connecting member from  FIG. 7 , 
         FIG. 9  shows a perspective view of the wiper blade detail from  FIG. 2  with the connecting member from  FIG. 7  in the fitted state, 
         FIG. 10  shows a perspective view of the connecting member from  FIG. 7  during attachment to a first wiper arm type, 
         FIG. 11  shows a perspective view of the connecting member from  FIG. 7  during attachment to a second wiper arm type, 
         FIG. 12  shows a perspective view of the connecting member from  FIG. 7  during attachment to a third wiper arm type, 
         FIG. 13  shows a perspective view of the connecting member from  FIG. 7  during attachment to a fourth wiper arm type, 
         FIG. 14  shows a perspective view of a detail II of the wiper blade from  FIG. 1 , with the wiper strip provided with the base connecting device, and with an adapter unit and a connecting member according to a second embodiment, in the unfitted state, 
         FIG. 15  shows a perspective view of the wiper blade detail from  FIG. 14  during installation of the connecting member, 
         FIG. 16  shows a perspective view of the wiper blade detail from  FIG. 15  with the connecting member during attachment to a first wiper arm type, 
         FIG. 17  shows a perspective view of the wiper blade detail from  FIG. 15  with the connecting member during attachment to a second wiper arm type, 
         FIG. 18  shows a perspective view of the wiper blade detail from  FIG. 15  with the connecting member during attachment to a third wiper arm type, 
         FIG. 19  shows a perspective view of the wiper blade detail from  FIG. 15  with the connecting member during attachment to a fourth wiper arm type, and 
         FIG. 20  shows a perspective view of the wiper blade detail from  FIG. 15  with the connecting member during attachment to a fifth wiper arm type. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  shows a wiper blade  100  with a wiper strip  112  which has a wiper lip  129  connected to a back strip  124  via a tilting web  127 . A spoiler  125  is provided on the back strip  124 . A base connecting device  160 , to which an adapter unit  150  for the connection of a connecting member  190  assigned to a wiper arm  118  is fastened, is provided on the wiper strip  112 . In  FIG. 1 , the connecting member  190  is connected to the adapter unit  150 , for example, via a hinge pin  169 . With the aid of the wiper arm  118 , the wiper blade  100  can be guided over a window  122  (illustrated by a chain-dotted line), for example a motor vehicle window, for wiping purposes. 
     According to an embodiment, the wiper blade  100  is a flat-bar construction, i.e. the wiper strip  112  has lateral longitudinal grooves in which two supporting rails, preferably spring rails, are arranged. As an alternative thereto, the wiper strip  112  can be designed as a hollow profile with an approximately central longitudinal channel in which an individual supporting rail is arranged. The wiper strip  112  with the base connecting device  160  provided thereon is preferably of hinge-free design, the base connecting device  160  preferably being preassembled on the wiper strip  112 . 
     In  FIG. 1 , the wiper blade  100  has not yet been completely placed onto the window  122 ; only the axial wiper blade ends  121 ,  123  of said wiper blade bear against the window  122  while the wiper strip  112  is still spaced apart from the window  122  in the wiper blade center  126 , i.e. approximately in the region of the adapter unit  150 . If a designated contact pressure is exerted on the connecting member  190  and therefore the adapter unit  150  via the wiper arm  118 , the wiper strip  112  is placed against the window  122 . This results in a uniform contact pressure over the entire length of the wiper blade even if the curvature of the window changes over the course of the wiping movement. 
       FIG. 2  shows a detail, which is identified by II in  FIG. 1 , of the wiper blade  100  with the wiper strip  112  and the adapter unit  150  in the fitted state according to an embodiment. The adapter unit  150  has a guide adapter  250  and a function adapter  280 . 
     In the illustration, the guide adapter  250  is fastened permanently to the base connecting device  160  from  FIG. 1 . Within the context of the present invention, “permanently” is to be understood as meaning that means for releasing the guide adapter  250  from the base connecting device  160  are not provided, and therefore release without using force is preferably impossible. However, it is pointed out that, alternatively, a releasable connection between the guide adapter  250  and base connecting device  160  from  FIG. 1  may be used, for example a latching connection via suitable latching and mating latching means. 
     A receiving groove  242  for receiving a first end region  212  of the spoiler  125  is formed at least in regions at an axial end region (shown on the left in  FIG. 2 ) of the guide adapter  250 . An actuable latching element  252  is formed at the axial end region (shown on the right in  FIG. 2 ) of said guide adapter. 
     In the illustration, the function adapter  280  has a bearing element  279  on which the connecting member  190  from  FIG. 1  can be mounted. The bearing element  279  has, by way of example, a circular aperture  277  through which, for example, the hinge pin  169  from  FIG. 1  can be passed. However, it is pointed out that the bearing element  279  with the aperture  277  is depicted in  FIG. 2  merely by way of example and not to restrict the invention. On the contrary, the bearing element  279  may have a multiplicity of different configurations which may be dependent, for example, on a configuration of the connecting member  190  from  FIG. 1 , as described by way of example for  FIG. 7 . 
     A cutout  292  for at least partially receiving the latching element  252  is provided on the axial end region (shown on the right in  FIG. 2 ) of the function adapter  280 . According to an embodiment, the function adapter  280  is connected releasably to the guide adapter  250 , as described in detail below for  FIG. 6 . Furthermore, at least in regions of said end region there is a receiving groove  244  for receiving a second end region  214  of the spoiler  125 . 
       FIG. 3  shows the wiper blade detail from  FIG. 2  with the wiper strip  112  and the base connecting device  160  fastened to the latter, and with the adapter unit  150 , in the unfitted state.  FIG. 3  shows clearly those end regions  212 ,  214  of the spoiler  125  which face the base connecting device  160 . 
     The base connecting device  160  consists by way of example of a first connecting rail  361  and a second connecting rail  363 . The connecting rails  361 ,  363  engage around at least part of the back strip  124  of the wiper strip  112 , which back strip is connected to the wiper lip  129 , and are preferably anchored, for example permanently latched, fixedly to each other and therefore to the back strip  124 . For the permanent latching, the rails  361 ,  363  preferably have suitable latching and mating latching means. However, it is pointed out that the anchoring of the rails  361 ,  363  to each other can also be achieved by other equivalent means, for example by snap-in or clamping connections. The present invention is therefore not limited to the use of latching and mating latching means. 
     In order to permanently fasten the guide adapter  250  to the base connecting device  160 , a plurality of shoulder-shaped retaining indentations  362 ,  364 ,  366 ,  368  are provided thereon. Column-like projections  392 ,  398  are formed in the axial end regions of the base connecting device  160  and, for example, two pin-shaped projections  394 ,  396  are provided in the central region of said base connecting device. Said projections  392 ,  394 ,  396 ,  398  serve as positioning elements in order to enable precise alignment and installation of the guide adapter  250 , as described below for  FIG. 6 . Furthermore, at least the positioning elements  394 ,  396  have, for example, according to an embodiment, pin-like extensions which are formed in the direction of the wiper strip  112  and can be fixed to the wiper strip  112  during the fastening of the base connecting device  160  in order therefore to prevent the device  160  from slipping on the wiper strip  112 . The extensions here may be pressed, for example in the manner of nails, into the wiper strip or may be anchored there by displacement of the rubber material of the wiper strip  112 . 
     The adapter unit  150  with the guide adapter  250  and the function adapter  280 , the upper sides  387  and  399 , respectively, of which are shown in  FIG. 3 , is produced, for example, from plastic. The guide adapter  250  is designed by way of example in the manner of an upside down U profile and has a platform-like base element  339 , on which two lateral wall elements  337 ,  338  are formed. Furthermore, the latching element  252 , which has, for example, a resilient latching tongue  305  with a latching cam  307 , is formed on the platform  339  in the manner of a tail. Guide elements  352 ,  354  and  356 ,  358 , which are designed to be at least partially three-dimensionally curved, are provided on the wall elements  337 ,  338 , respectively. Said guide elements are preferably inclined discontinuously and, in the illustration, are at least partially of elongated S-shaped design. The guide elements  352 ,  354 ,  356 ,  358  are provided with associated blocking members  372 ,  374 ,  376 ,  378 , the function of which is described below for  FIG. 6 . For the permanent fastening of the guide adapter  250  to the base connecting device  160 , retaining arms  322 ,  324  and  326 ,  328  ( FIG. 4 ) are provided on the wall elements  337 ,  338 , respectively. 
     The function adapter  280  is designed by way of example in the manner of a sled and has a support element  336 , on which two lateral, runner-like wall elements  334 ,  335  are provided. Sliding elements  382 ,  384  ( FIG. 5) and 386 ,  388  ( FIG. 5 ) are formed on said runner-like wall elements  334 ,  335 , respectively. Said sliding elements are preferably formed with a substantially identical shaping to the guide elements  352 ,  354 ,  356 ,  358 . Accordingly, the sliding elements  382 ,  386  and  384 ,  388  ( FIG. 5 ) are at least partially three-dimensionally curved, are preferably inclined discontinuously and are preferably at least partially of elongated S-shaped design. 
       FIG. 4  shows the lower side  499  of the guide adapter  250 .  FIG. 4  shows clearly the three-dimensional curved configuration of the guide elements  356 ,  358 , the associated stop members  376  and  378 , respectively, the longitudinal groove  242  and the retaining arms  322 ,  324 ,  326 ,  328 . 
     In the illustration, pocket-like receiving elements  412 ,  414 ,  416 ,  418  are formed on the lower side  499  of the guide adapter  250 . Said receiving elements serve to receive the projections  392 ,  394 ,  396  and  398  formed on the base connecting device  160  from  FIG. 3 . 
       FIG. 5  shows the function adapter  280  from  FIG. 3  with the longitudinal groove  244 , the cutout  292 , the bearing element  279  and the sliding elements  382 ,  384 ,  386 ,  388 . As described above, the latter are at least partially of three-dimensionally curved design and, in the illustration here, are at least partially in the shape of an elongated S. 
     The sliding elements  382 ,  384 ,  386 ,  388  have, for example, assigned stop members  582 ,  584 ,  586  and  588 , respectively. The latter interact with the blocking members  372 ,  374 ,  376 ,  378  ( FIG. 4 ) of the guide adapter  250  from  FIG. 4  in order at least to limit a displacement of the function adapter  280  relative to the guide adapter  250  from  FIG. 4 . 
       FIG. 6  shows the wiper blade detail from  FIGS. 2 and 3  during installation of the adapter unit  150  on the base connecting device  160 . For this purpose, in a first step, the guide adapter  250  is pressed or pushed in the direction of an arrow  699  onto the device  160 . The retaining arms  322 ,  324 ,  326 ,  328  ( FIG. 4 ) of the guide adapter  250  are initially elastically deformed in the process from an initial shape until said retaining arms engage in the associated retaining indentations  362 ,  364 ,  366 ,  368  ( FIG. 3 ) of the base connecting device  160 . They resume their initial shape there and are therefore interlocked in the retaining indentations  362 ,  364 ,  366 ,  368  ( FIG. 3 ), thus producing a permanent snap-in connection between the guide adapter  250  and the base connecting device  160 . At the same time, the projections  392 ,  394 ,  396 ,  398  ( FIG. 3 ) of the base connecting device  160  engage in the pocket-like receiving elements  412 ,  414 ,  416 ,  418  ( FIG. 4 ) of the guide adapter  250  such that the latter is aligned in a slip-free and precise manner on the base connecting device  160 . Furthermore, the end region  212  of the spoiler  125  is now received in the longitudinal groove  242  of the guide adapter  250  while the end region  214  of said spoiler is still exposed. 
     In a second step, the function adapter  280  is positioned in the direction of the arrow  699  on the guide adapter  250  in such a manner that the sliding elements  382 ,  384 ,  386 ,  388  ( FIG. 5 ) are arranged in the region of the guide elements  352 ,  354 ,  356 ,  358  ( FIG. 4 ). The function adapter  280  is then moved in the direction of arrows  610 ,  620  relative to the guide adapter  250  by a combined translational and rotational movement in such a manner that the sliding elements  382 ,  384 ,  386 ,  388  ( FIG. 5 ) are displaced in a manner sliding along the guide elements  352 ,  354 ,  356 ,  358 . The function adapter  280  is displaced in the process in the manner of a sled from a release position, which is illustrated in  FIG. 6 , into a retaining position, which is illustrated in  FIG. 2  and in which the stop members  382 ,  384 ,  386 ,  388  ( FIG. 5 ) of the function adapter  280  are blocked by the blocking members  372 ,  374 ,  376 ,  378  ( FIG. 4 ) of the guide adapter  250 . 
     During the displacement of the function adapter  280  from the release position into the retaining position, the actuable latching element  252  is initially deformed elastically in the direction of an arrow  652 . In the process, by the function adapter  280  pressing against the latching cam  307 , the latching tongue  305  is deflected resiliently in the direction of the arrow  652  from an initial position. When the retaining position of the function adapter  280  is reached, the latching tongue  305  springs back again into the initial position thereof, i.e. in the opposite direction to the arrow  652 , and the latching cam  307  reaches through the cutout  292  in the function adapter  280  and latches releasably there, as shown in  FIG. 2 . The latching cam  307  now prevents a reversing movement of the function adapter  280  in the direction of the arrows  610 ,  620 . Furthermore, the end region  214  of the spoiler  125  is now held in the longitudinal groove  244  of the function adapter  280 . 
     As described above for  FIG. 2 , the latching element  252  of the guide adapter  250  is latched releasably to the function adapter  280 . Said releasable latching can be released by actuation of the latching element  252 . For this purpose, the latching cam  307  has to be pressed out of the cutout  292  in the direction of the arrow  652  in order to permit a sliding displacement of the function adapter  280  relative to the guide adapter  250  along the arrows  610 ,  620  from the retaining position into the release position. 
       FIG. 7  shows the function adapter  280  from  FIGS. 2 and 3  with a bearing element  279 , which is designed by way of example, for connection to the connecting member  190 , which is designed according to a first embodiment, from  FIG. 1 . In  FIG. 7 , the bearing element  279  has at least two wall elements  712 ,  714  aligned parallel to each other for at least partially laterally supporting the connecting member  190 . The wall elements  712 ,  714  are provided with, for example, circular openings  722 ,  724 , between which a pocket-like recess  799 , which is provided on the support element  336 , is formed. 
     The connecting member  190  has, by way of example, a base element  730  which can be mounted on the function adapter  280  and can be connected to a cover member  740  and an adapter element  750 . The base element  730  can be fastened to the function adapter  280  preferably via a snap-in connection and is therefore also referred to below as the “fastening member”. According to an embodiment, the fastening member  730 , the cover member  740  and the adapter element  750  are produced from plastic, for example by plastics injection molding. However, other production methods and materials or combinations of materials may also be used. 
     The fastening member  730  is designed by way of example for attachment to a first multiplicity of different wiper arm types, as described below for  FIGS. 10 and 11 . The adapter element  750  is designed by way of example for attachment to a second multiplicity of different wiper arm types which differ from the wiper arm types of the first multiplicity of wiper arm types, as described below for  FIGS. 12 and 13 . The cover member  740  is designed by way of example for fixing different wiper arm types to the fastening member  730  or to the adapter element  750 . 
     According to an embodiment, a bearing member  798  having a shaping, which corresponds, by way of example, to the shaping of the pocket-like recess  799 , is provided on a lower side  711  of the fastening member  730 . The bearing member  798  has a shaft  738  which is designed for receiving in the circular openings  722 ,  724 . As an alternative thereto, instead of a continuous shaft  738 , it is also possible for two pin-shaped or cylindrical lateral projections to be formed on the fastening member  730 . Lateral blocking elements, of which only the blocking element  785  is visible in  FIG. 7 , are formed on an axial end region of the bearing member  798 . 
     The bearing member  798  is integrally formed on a support block  739 , which is at least partially designed as a hollow profile and has a cavity  735  which has a passage opening or bore  736  and a preferably flat upper side  713 . Lateral blocking elements  733  and  793  ( FIG. 8 ) are formed on that axial end region of the support block  739  which is on the right in  FIG. 7 , said blocking elements being integrally formed on the support block  739 , for example, via a T-shaped elongation  716 . Lateral connecting elements  717 ,  719 , which are L-shaped, for example, are integrally formed on that axial end region of the support block  739  which is on the left in  FIG. 7 . Said connecting elements respectively have a circular opening  732  and  734  and a pin-like projection  731  and  737  for connection to the cover member  740 . 
     The cover member  740  is designed by way of example in the manner of a cuboidal hood, with an upper wall element  748  and side walls  741 ,  743  which are connected to each other via a terminating wall  789 . The sides  747  and  788 , which are opposite the upper wall element  748  and the terminating wall  789 , are open. An opening  745  is provided in the upper wall element  748 . Openings  742  and  744  ( FIG. 8 ) for receiving the projections  737  and  731  during fastening of the cover member  740  to the fastening member  730  are provided in the side walls  741 ,  743 , respectively. Those end regions  749  of the side walls  741 ,  743  which face the open side  788  are shaped concavely in the illustration. According to an embodiment, the cover member  740  is designed for fixing the adapter element  750  to the fastening member  730 . 
     The adapter element  750  is designed by way of example as a hollow or U-profile with a top element  715 , on which two lateral wall elements  752 ,  754  are integrally formed, on which, in turn, respective retaining webs  758  and  756  are provided. The top element  715  is provided with a longitudinal groove  753  and a transverse groove  751 . The wall elements  752 ,  754  have preferably circular openings, of which only the opening  755  provided in the wall element  752  can be seen in  FIG. 7 . According to an embodiment, the wall elements  752 ,  754  are shaped convexly on their end regions  759 , which, following installation on the fastening member  730 , face the cover member  740 , in such a manner that said end regions  759  and the end regions  749  of the side walls  741 ,  743  of the cover member  740  intermesh in a form-fitting manner. Furthermore, the end regions  759  of the wall elements  752 ,  754  protrude relative to an end region  757  of the top element  715  such that, after the installation, a clearance ( 1210  in  FIG. 12 ) is formed between the top element  715  and the upper wall element  748  of the cover member  740 . 
       FIG. 8  shows the wiper blade detail from  FIG. 2  during the installation of the connecting member  190  from  FIG. 7  on the function adapter  280 , which is connected releasably to the guide adapter  250  from  FIG. 2 , according to the configuration shown in  FIG. 7 . In this case, the fastening member  730  is initially fastened to the function adapter  280 , for example, by a snap-in connection. For this purpose, the fastening member  730  is pushed onto the function adapter  280  in the direction of an arrow  810 , wherein the wall elements  714  and  712  thereof ( FIG. 7 ) are elastically deformed laterally outward from an initial position until the bearing member  798  ( FIG. 7 ) is arranged in the pocket-like recess  799  ( FIG. 7 ) of the function adapter  280  and the shaft  738  is arranged in the region of the openings  724  and  722  ( FIG. 7 ). The wall elements  712 ,  714  now move back into the initial position thereof such that the axial ends of the shaft  738  are received in the openings  722 ,  724  and therefore a snap-in connection is produced between the fastening member  730  and function adapter  280 , in which lateral slipping of the fastening member  730  is prevented by the wall elements  712 ,  714 . 
     In a next step, the cover member  740  can be fastened rotatably to the fastening member  730 , preferably via a snap-in connection. For this purpose, the cover member  740  is pushed, for example, in the direction of the arrow  810  onto the connecting elements  717 ,  719  of said fastening member, the connecting elements moving elastically toward each other in the process from an initial position until pin-shaped shaft elements, which are formed on the side walls  741 ,  743  of the cover member  740  and of which only the shaft element  746  which is formed on the side wall  743  is visible in  FIG. 8 , engage in the openings  732 ,  734  provided on the fastening member  730 . 
     In a further step, the adapter element  750  can now be pushed, for example in the direction of the arrow  810 , onto the fastening member  730 . This is described below for  FIG. 12 . 
       FIG. 9  shows the arrangement from  FIG. 8  without the adapter element  750 , in which arrangement the cover member  740  is latched releasably to the fastening member  730  by means of the projections  737  and  731  ( FIG. 8 ) engaging in the openings  742 ,  744 , respectively, ( FIG. 8 ), preferably by means of a snap-in connection. For this purpose, in order to produce the snap-in connection, the cover member  740  is rotated from the position thereof which is shown in  FIG. 8  in the direction of an arrow  910  toward the fastening member  730  in order to latch there. 
       FIG. 10  shows an arrangement  1000  in which, by way of example, a wiper arm  1018 , representing the wiper arm  118  from  FIG. 1 , of the “Top-Lock2” wiper arm type is attached to the fastening member  730 , which is connected to the cover member  740 . In the illustration, the wiper arm  1018  has retaining rails  1022 ,  1024  directed inward. In order to simplify the illustration, only the wiper arm  1018 , the fastening member  730  and the cover member  740  are shown in  FIG. 10 . 
     The wiper arm  1018  is pushed in the direction of arrows  1052 ,  1054  onto the fastening member  730  until the lateral blocking elements  785  thereof block the retaining rails  1022 ,  1024  of the wiper arm  1018  and therefore prevent further displacement of the wiper arm  1018  in the direction of the arrows  1052 ,  1054 . Then, as described for  FIG. 9 , the cover member  740  is rotated in the direction of an arrow  1099  toward the fastening member  730  in order to latch there. In this case, a form-fitting connection between the concave end regions  749  of the side walls  741 ,  743  of the cover member  740  and correspondingly convexly shaped end regions  1012  of the wiper arm  1018  is preferably produced, and therefore the wiper arm  1018  is prevented from slipping in the opposite direction to the arrows  1052 ,  1054 , i.e. in the direction of an arrow  1097 . 
       FIG. 11  shows an arrangement  1100 , in which, by way of example, a wiper arm  1118 , representing the wiper arm  118  from  FIG. 1 , of the “Valeo Top-Lock2” wiper arm type is attached to the fastening member  730 , which is connected to the cover member  740 . In the illustration, the wiper arm  1118  has an elongate connecting component  1111  on which a retaining tongue  1112  having an opening  1114 , and lateral retaining shoulders  1116  and  1117  are integrally formed. To simplify the illustration,  FIG. 11  likewise only shows the wiper arm  1118 , the fastening member  730  and the cover member  740 . 
     The wiper arm  1118  is pushed in the direction of arrows  1152 ,  1154  onto the fastening member  730  until the lateral blocking elements  733 ,  793  thereof block the retaining shoulders  1116 ,  1117  of the wiper arm  1118  and therefore prevent further displacement of the wiper arm  1118  in the direction of the arrows  1152 ,  1154 . Then, as described for  FIG. 9 , the cover member  740  is rotated in the direction of an arrow  1199  toward the fastening member  730  in order to latch there. A form-fitting connection between the concave end regions  749  of the side walls  741 ,  743  of the cover member  740  and corresponding end regions  1115  of the wiper arm  1118  is preferably produced in this case, and therefore the wiper arm  1118  is prevented from slipping in a direction opposite to the arrows  1152 ,  1154 , i.e. in the direction of an arrow  1197 . 
       FIG. 12  shows an arrangement  1200 , in which, by way of example, a wiper arm  1218 , representing the wiper arm  118  from  FIG. 1 , of the “Side-Lock1” wiper arm type is attached to the fastening member  730 , which is connected to the cover member  740  and to which the adapter element  750  is fastened. To simplify the illustration,  FIG. 12  shows only the wiper arm  1218 , the fastening member  730 , the cover member  740  and the adapter element  750 . 
     For the fastening to the fastening member  730 , the adapter element  750  is pushed onto the latter, for example in the direction of the arrow  810  from  FIG. 8 , thus producing a snap-in connection between said components, in which the adapter element  750  engages around at least part of the fastening member  730  in the manner of a cap and/or claw. Said snap-in connection is brought about by the retaining webs  758 ,  756  ( FIG. 7 ), which are provided on the adapter element  750 , reaching under the support block  739  of the fastening member  730  and being prevented there, preferably by the lateral blocking elements  785  of said support block ( FIG. 7 ), from being displaced axially to the right—in  FIG. 12 . An axial displacement of the adapter element  750  to the left—in FIG.  12 —is prevented by the latched cover member  740 , as described for  FIG. 9 , since the concave end regions  749  of the side walls  741 ,  743  thereof bear in a form-fitting manner against the convex end regions  759  of the adapter element  750 . 
     In the illustration, the wiper arm  1218  has a rotary shaft  1212  and a retaining bracket  1214  and is pushed in the direction of an arrow  1251  onto the connecting member  190  in such a manner that the rotary shaft  1212  is passed through the openings  755 ,  736  ( FIG. 7 ) in the adapter element  750  and in the fastening member  730 , respectively, as indicated by a chain-dotted arrow  1252 . The retaining bracket  1214  in  FIG. 12  is positioned in the process above the adapter element  750 . 
     The wiper arm  1218  is then rotated in the direction of an arrow  1299  toward the connecting member  190  such that the retaining bracket  1214  is received in the transverse groove  751  of the adapter element  750 . In the process, a retaining hook  1244  provided on the retaining bracket  1214 —in FIG.  12 —reaches behind the lateral wall element  754  of the adapter holder  750  while the wiper arm  1218  bears against the lateral wall element  752 , thus preventing the rotary shaft  1212  from slipping out of the connecting member  190 . 
       FIG. 13  shows an arrangement  1300 , in which, by way of example, a wiper arm  1318 , representing the wiper arm  118  from  FIG. 1 , of the “9×3 hook” or “9×4 hook” wiper arm type is attached to the fastening member  730 , which is connected to the cover member  740  and to which the adapter element  750  is fastened, as described for  FIG. 12 . To simplify the illustration,  FIG. 13  only shows the wiper arm  1318 , the fastening member  730 , the cover member  740  and the adapter element  750 . 
     In the illustration, the wiper arm  1318  is of hook-shaped design and has an elongate connecting component  1316  on which a hook  1312  is integrally formed via a curved element  1314 . For the fastening to the connecting member  190 , the wiper arm  1318  is positioned on the latter in the direction of an arrow  1351  in such a manner that the elongate connecting component  1316  is arranged in the longitudinal groove  753  and the curved element  1314  with the hook  1312  engages into at least part of the cover member  740  via the open side  788  of said cover member  740 . The wiper arm  1318  is then displaced in the direction of an arrow  1352  such that the hook  1312  is introduced into the cavity  735  of the support block  739  of the fastening member  730  until the curved element  1314  bears against the end region  757  of the top element  715  of said fastening member. 
     The cover member  740  is then rotated, as described for  FIG. 9 , in the direction of an arrow  1399  toward the fastening member  730  in order to latch there. The curved element  1314  is therefore blocked in the clearance  1210 , thus preventing the wiper arm  1318  from slipping out in a direction opposite to the arrow  1352 . 
       FIG. 14  shows a detail of the wiper blade  100  from  FIG. 1  with an adapter unit  1500  and a connecting member  1900  according to a further embodiment. The adapter unit  1500  is preferably designed for permanently fastening to the base connecting device  160 , which is connected to the wiper strip  112 . The wiper strip  112  and the base connecting device  160  are constructed as described above for  FIGS. 1 to 3 , and therefore, in order to keep the description concise, a repeated description is omitted here. 
     In contrast to the adapter unit  150  described for  FIGS. 2 to 13 , the adapter unit  1500  is preferably formed as a single piece and, for example, from plastic. However, it is pointed out that other materials may also be used. The adapter unit  1500  is configured, by way of example, with a shaping in the manner of a submarine and has a top element  1539 , on which two lateral wall elements  1537 ,  1538  are integrally formed. To permanently fasten the adapter unit  1500  to the base connecting device  160 , the lower side  1550  of said adapter unit and the mutually facing insides of the lateral wall elements  1537 ,  1538  are designed, for example, in the manner of the respective lower side  499  and the wall elements  337 ,  338  of the guide adapter  250  from  FIGS. 3 and 4 . Accordingly, according to an embodiment, retaining arms are provided on the wall elements  1537 ,  1538 , said retaining arms corresponding to the retaining arms  322 ,  324 ,  326 ,  328  from  FIGS. 3 and 4 , and pocket-like receiving elements, which correspond to the receiving elements  412 ,  414 ,  416 ,  418  from  FIG. 4 , are formed on the lower side  1550 . 
     However, it is pointed out that other types of fastening for permanently fastening the adapter unit  1500  to the base connecting device  160  are also possible. For example, latching hooks can be provided on the lower side  1550  of the adapter unit  1500 , which latching hooks can be latched to latching lugs  1410 ,  1420 ,  1412 ,  1422 , which, in the illustration, are formed on the base connecting device  160 . 
     By way of example, a bearing element  1598 , on which the connecting member  1900  can be mounted, is formed on the top element  1539  of the adapter unit  1550 . The bearing element  1598  has, by way of example, a pocket-like bearing receptacle  1599 . However, it is pointed out that the bearing element  1598  with the receptacle  1599  is merely depicted by way of example in  FIG. 14  and not to restrict the invention. On the contrary, the bearing element  1598  may have a multiplicity of different configurations which may be dependent on a configuration of the connecting member  1900 . For example, the bearing element  1598  can be designed in the manner of the bearing element  279  from  FIG. 2 . 
     A receiving groove  1542  for receiving a first end region  212  of the spoiler  125  of the wiper blade  100  is formed at least in regions of an axial end region of the adapter unit  1500 , which end region is shown on the left in  FIG. 14 . A receiving groove  1544  for receiving a second end region  214  of the spoiler  125  is formed at least in regions of the axial end region of said adapter unit which is shown on the right in  FIG. 2 . 
     Furthermore, according to an embodiment, a tower-like guide and positioning member  1510  for the simplified alignment of the connecting member  1900  on the adapter unit  1500  is formed on the top element  1539 , said guide and positioning member having two wall elements  1514 ,  1518  which are connected to each other via a terminating wall  1516  and a support part  1515 . The support part  1515  can cover only part of the guide and positioning member  1510 , as shown in  FIG. 14 , or else can cover the latter completely. A side surface  1512  of the guide and positioning member  1510 , which side surface is opposite the terminating wall  1516 , is open. 
     The connecting member  1900  has, by way of example, a base element  1730  which can be mounted on the adapter unit  1500  and can be connected to a cover member  1740  and to an adapter element  1750 . The base element  1730  can be fastened to the adapter unit  1500 , preferably via a snap-in connection, and is therefore also referred to below as the “fastening member”. According to an embodiment, the fastening member  1730 , the cover member  1740  and the adapter element  1750  are produced from plastic, for example by plastic injection molding. However, other production methods and materials and combinations of materials may also be used. 
     The fastening member  1730  is designed, by way of example, for attachment to a first multiplicity of different wiper arm types, as described below for  FIGS. 16 to 18 . The adapter element  1750  is designed, by way of example, for attachment to a second multiplicity of different wiper arm types which at least partially differ from the wiper arm types of the first multiplicity of wiper arm types, as described below for  FIGS. 18 to 20 . The cover member  1740  is designed, by way of example, for fixing different wiper arm types to the fastening member  1730  or to the adapter element  1750 . 
     According to an embodiment, a bearing member  1798  with a shaping, which corresponds, for example, to the shaping of the pocket-like bearing receptacle  1599 , is provided on a lower side  1710  of the fastening member  1730  in order, for example, to permit the production of the snap-in connection between said components. The bearing member  1798  has a shaft  1724  which is preferably designed for latching in the bearing receptacle  1599  and can have one or more, for example, wall-like positioning aids  1722 . As an alternative thereto, instead of a continuous shaft  1724 , two pin-shaped or cylindrical, lateral projections may also be formed on the fastening member  1730 . 
     By way of example, wall elements  1726 ,  1728 , which are provided with circular openings  1736  and  1738 , respectively, are integrally formed on the bearing member  1798 . Between the wall elements  1726 ,  1728 , an aperture  1710  is formed in the bearing member  1798 , the dimensions of which aperture correspond to the dimensions of the tower-like guide and positioning member  1510  so that the latter can be passed through the aperture  1710 . 
     Lateral blocking members  1733  and  1793  ( FIGS. 16 to 20 ) and an illustrated positioning pin or knob  1727 , and also lateral blocking members  1785  and  1786  ( FIG. 17 ) are formed on that axial end region of the wall elements  1726 ,  1728 , respectively, which is on the right in  FIG. 14 . Lateral connecting members  1719  and  1717  are integrally formed on that axial end region of the wall elements  1726 ,  1728 , respectively, which is on the left in  FIG. 14 . The connecting member  1719  has, by way of example, a bearing shaft  1732  for the rotatable mounting of the cover member  1740 . In the illustration, a latching stud  1734  for the releasable latching of the cover member  1740  is provided on the connecting member  1717 . 
     The cover member  1740  is designed, by way of example, in the manner of a cuboidal hood, with an upper wall element  1748  and side walls  1741 ,  1743 , which are connected to each other via a terminating wall  1789 . The sides  1747  and  1788  opposite the upper wall element  1748  and the terminating wall  1789 , respectively, are open. In the illustration, those end regions  1749  of the side walls  1741 ,  1743  which face the open side  1788  are shaped concavely. According to an embodiment, the cover member  1740  is designed for fixing the adapter element  1750  to the fastening member  1730 . 
     The adapter element  1750  is designed, by way of example, as a hollow or U profile with a top element  1715 , on which two lateral wall elements  1752 ,  1754  are integrally formed. The top element  1715  is formed at least with a longitudinal groove  1753 , but, like the adapter element  750  from  FIG. 7 , may also be provided with a transverse groove ( 751  in  FIG. 7 ). The wall elements  1752 ,  1754  preferably have circular openings  1755  and  1756 , respectively. 
     Lateral stop elements  1751  and  1758  ( FIGS. 18 to 20 ) are formed on the axial end regions of the wall elements  1752 ,  1754 , respectively, which are on the right in  FIG. 14 . On the axial end regions  1759  thereof which are on the left in  FIG. 14 , the wall elements  1752 ,  1754 , according to an embodiment, are shaped convexly in such a manner that said end regions  1759  and the end regions  1749  of the side walls  1741 ,  1743  of the cover member  1740  intermesh in a form-fitting manner. Furthermore, the end regions  1759  of the wall elements  1752 ,  1754  protrude relative to an end region  1757  of the top element  1715  such that, following installation, a clearance ( 1888  in  FIG. 18 ) is formed between the top element  1715  and the upper wall element  1748  of the cover member  1740 . 
       FIG. 15  shows the wiper blade detail from  FIG. 14  during the installation of the connecting member  1900  on the adapter unit  1500 , which is permanently connected to the base connecting device  160 . In this case, the fastening member  1730  is first of all pushed onto the adapter unit  1500 , in order to fasten said components to one another, wherein the bearing member  1798  is arranged and fixed in the pocket-like bearing receptacle  1599  ( FIG. 14 ). By means of the configuration of the bearing element  1598  that is shown in  FIG. 14 , lateral slipping of the fastening member  1730  can be prevented. 
     In a next step, the cover member  1740  can be fastened rotatably to the fastening member  1730 , preferably via a snap-in connection, as described by way of example below for  FIG. 16 . The adapter element  1750  can then be pushed onto the fastening member  1730 , as described by way of example below for  FIG. 18 . 
       FIG. 16  shows an arrangement  1600 , in which, by way of example, the wiper arm  1118 , representing the wiper arm  118  from  FIG. 1 , of the “Valeo Top-Lock2” wiper arm type from  FIG. 11  is attached to the fastening member  1730 , which is connected to the cover member  1740 . According to an embodiment, the cover member  1740  has claw-like fixing elements  1745  which can preferably be latched by means of a snap-in connection to the bearing shaft  1732  of the fastening member  1730  in such a manner that the cover member  1740  can be rotated about the bearing shaft  1732 , wherein the axis of rotation defined by the bearing shaft  1732  lies approximately parallel to the axial extent of the wiper strip  112 . 
     As  FIG. 16  shows clearly, the wiper arm  1118  is first of all pushed in the direction of arrows  1651  or  1652  and  1654  onto the fastening member  1730  until the lateral blocking members  1733 ,  1793  thereof block the retaining shoulders  1116  ( FIG. 11 ),  1117  of the wiper arm  1118  and therefore prevent further displacement of the wiper arm  1118  in the direction of the arrows  1652 ,  1654 . Then, in order to produce a snap-in connection, the cover member  1740  is rotated in the direction of an arrow  1699  toward the fastening member  1730  such that the latching stud  1734  engages in an opening  1742 , which is provided in the side wall  1743 , in order to latch releasably there. A form-fitting connection between the concave end regions  1749  of the side walls  1741 ,  1743  of the cover member  1740  and corresponding end regions  1115  of the wiper arm  1118  is preferably produced in the process, thus preventing the wiper arm  1118  from slipping out in the opposite direction to the arrows  1652 ,  1654 . 
       FIG. 17  shows an arrangement  1700 , in which, by way of example, the wiper arm  1018 , representing the wiper arm  118  from  FIG. 1 , of the “Top-Lock2” wiper arm type from  FIG. 10  is attached to the fastening member  730 , which is connected to the cover member  740 . For this purpose, the wiper arm  1018  is pushed in the direction of arrows  1712 ,  1714  onto the fastening member  1730  until the lateral blocking elements  1785  ( FIG. 14 ),  1786  thereof block the retaining rails  1022 ,  1024  of the wiper arm  1018  and therefore prevent further displacement of the wiper arm  1018  in the direction of the arrows  1712 ,  1714 . Then, as described for  FIG. 16 , the cover member  1740  is rotated in the direction of an arrow  1799  toward the fastening member  1730  in order to latch there. A form-fitting connection between the concave end regions  1749  of the side walls  1741 ,  1743  of the cover member  1740  and correspondingly convexly shaped end regions  1012  of the wiper arm  1018  is preferably produced in the process, thus preventing the wiper arm  1018  from slipping out in a direction opposite to the arrows  1712 ,  1714 . 
       FIG. 18  shows an arrangement  1800 , in which, by way of example, a wiper arm  1818 , representing the wiper arm  118  from  FIG. 1 , of the “Valeo Top-Lock3” wiper arm type is attached to the fastening member  1730 , which is connected to the cover member  1740 . The wiper arm  1818  has, by way of example, a longitudinal element  1816  with a positioning opening  1827  and a bent or angled end piece  1815 .  FIG. 18  shows clearly a clearance  1888  formed between the end region  1757  of the top element  1715  and cover member  1740 . 
     As  FIG. 18  shows, the wiper arm  1818  is first of all positioned on the fastening member  1730  and the cover member  1740  such that the end piece  1815  is arranged in the region of the connecting members  1717 ,  1719  and the positioning pin or knob  1727  of the fastening member  1730  at least partially engages in the positioning opening  1827  in the wiper arm  1818 . The adapter element  1750  is then pushed in the direction of arrows  1852 ,  1854  over the wiper arm  1818  onto the fastening member  1730  until the lateral blocking members  1733 ,  1793  thereof block the lateral stop elements  1758  and  1751 , respectively, ( FIG. 14 ) of the adapter element  1750  and therefore prevent further displacement of the adapter element  1750  in the direction of the arrows  1852 ,  1854 . The adapter element  1750  therefore engages around at least part of the fastening member  1730  in the manner of a cap. 
     Then, as described for  FIG. 16 , the cover member  1740  is rotated in the direction of an arrow  1899  toward the fastening member  1730  in order to latch there. A form-fitting connection between the concave end regions  1749  of the side walls  1741 ,  1743  of the cover member  1740  and the end regions  1759  of the adapter element  1750  is preferably produced in the process, thus preventing the wiper arm  1818  from slipping out in the direction opposite to the arrows  1852 ,  1854 . 
       FIG. 19  shows an arrangement  1950 , in which, by way of example, the wiper arm  1318 , representing the wiper arm  118  from  FIG. 1 , of the “9×3 hook” or “9×4 hook” wiper arm type from  FIG. 13  is attached to the fastening member  1730 , which is connected to the cover member  1740  and to which the adapter element  1750  is fastened, as described for  FIG. 18 . For the fastening to the connecting member  1900 , the wiper arm  1318  is positioned on the latter, in a similar manner as described for  FIG. 13 , in such a manner that the elongate connecting component  1316  is arranged in the longitudinal groove  1753 , and the hook  1312  engages under the support part  1515  into the tower-like guide and positioning member  1510  from  FIG. 14  such that the curved element  1314  bears against the end region  1757  of the top element  1715  from  FIG. 14 . 
     Then, as described for  FIG. 16 , the cover member  1740  is rotated in the direction of an arrow  1999  toward the fastening member  1730  in order to latch there. The curved element  1314  is therefore blocked in the clearance  1888 , thus preventing the wiper arm  1318  from slipping out of the connecting member  1900 . 
       FIG. 20  shows an arrangement  2000 , in which, by way of example, the wiper arm  1218 , representing the wiper arm  118  from  FIG. 1 , of the “Side-Lock1” wiper arm type from  FIG. 12  is attached to the fastening member  1730 , which is connected to the cover member  1740  and to which the adapter element  1750  is fastened, as described for  FIG. 18 . 
     In the illustration, the wiper arm  1218  is pushed in the direction of an arrow  2051  onto the connecting member  1900  in such a manner that the rotary shaft  1212  is passed through the openings  1756 ,  1755  ( FIG. 14 ) in the respective adapter element  1750  and  1738 ,  1736  ( FIG. 15 ) of the fastening member  1730 . In the process, the retaining bracket  1214  is positioned over the adapter element  1750  in  FIG. 20 . 
     The wiper arm  1218  is then rotated in the direction of an arrow  2099  toward the connecting member  1900  such that the retaining hook  1244  provided on the retaining bracket  1214  reaches—in FIG.  20 —in front of the lateral wall element  1754  of the adapter holder  1750  while the wiper arm  1218  bears against the lateral wall element  1752 , thus preventing the rotary shaft  1212  from slipping out of the connecting member  1900 .