Patent Publication Number: US-2019194983-A1

Title: Motor vehicle door handle assembly with assembly aid

Description:
The invention relates to a motor vehicle door handle arrangement according to the preamble of claim  1 . Furthermore, the invention relates to a method for producing and assembling such a motor vehicle door handle arrangement. 
     Such motor vehicle door handle arrangements with a handle for actuating a door of a motor vehicle are known. Moreover, arranging electronic components such as an antenna, a coil wound around an antenna for the automatic establishment of a radio connection to an external ID transponder and/or sensors in the handle, is known. The terms winding and coil are used synonymously. 
     The object of the invention is to provide a motor vehicle door handle arrangement, in which production and assembly is simplified. 
     According to the invention, this object is achieved by means of a motor vehicle door handle arrangement according to claim  1 . Advantageous developments of the invention are specified in the dependent claims. 
     The particular advantage in the motor vehicle door handle arrangement with a handle, wherein at least one antenna carrier is arranged in the handle, which accommodates at least one sensor plate of a capacitive proximity sensor, and wherein the sensor plate is connected, via contact pins, with a connection piece for producing electrical contacts, is that the sensor plate is arranged in the antenna carrier in a form-fit manner and is inserted into a groove-shaped or dovetail-shaped receptacle of the antenna carrier in the direction of its longitudinal extension, wherein the sensor plate and/or the antenna carrier comprise(s) a latching connection, in which the sensor plate is releasably latched in a pre-mounting position, in order to make the mounting of the connection piece on the sensor plate possible. 
     In this pre-mounting position, it is possible to place the connection piece for producing electrically-conductive connections for the connection of the sensor plate, and in particular an antenna on to an electronic assembly of the motor vehicle door handle arrangement. After the mounting of the connection piece, the sensor plate, with the connection piece, can be pushed into its final mounting position, wherein the sensor plate and/or the connection piece preferably is/are fixed by engaging behind an undercut on the antenna carrier. 
     The sensor plate preferably comprises one or multiple recesses on one or both longitudinal edges, into which protrusions of the antenna carrier engage and releasably latch the sensor plate in a pre-mounting position. Alternatively or cumulatively, the antenna carrier can comprise one or multiple recesses, into which protrusions on one or both longitudinal edges of the sensor plate engage and releasably latch the sensor plate in a pre-mounting position. 
     Due to the preferred material combination of the sensor plate manufactured from metal and the antenna carrier manufactured from plastic material, the latching of the pre-mounting position can be released in a simple manner, and the sensor plate with the placed-on connection piece can be displaced into its final mounting position in the antenna carrier without damaging one or both of the components sensor plate or antenna carrier. 
     Accordingly, the sensor plate is pushed into its final mounting position together with the connection piece after the mounting of the connection piece, wherein the sensor plate and/or the connection piece preferably is/are fixed on the antenna carrier by engaging behind an undercut. Here, an undercut on the plug and/or on the sensor plate and/or on the antenna carrier is engaged behind by a corresponding counter part on the respective corresponding component. 
     The antenna carrier preferably further accommodates a ferromagnetic core and a coil which is wound around the core and/or the antenna carrier, in particular wherein the ferromagnetic core is arranged in the antenna carrier in a form-fit manner. The ferromagnetic core is fixed and securely held by the form-fit between the ferromagnetic core and the antenna carrier. 
     The antenna carrier preferably accommodates a ferromagnetic core, and the ferromagnetic core is inserted into a groove-shaped or dovetail-shaped receptacle of the antenna carrier in the direction of its longitudinal extension, in particular inserted into the receptacle in a direction opposite to the insertion direction of the sensor plate. 
     The term “insertion into opposite directions” means the movement direction in the respective assembly process here. Thus, the ferromagnetic core can be inserted into a corresponding receptacle of the antenna carrier for the core from the rear end of the antenna carrier, and the sensor plate can be inserted into a corresponding receptacle of the antenna carrier for the sensor plate from the front end of the antenna carrier, or vice versa. However, it is also possible to insert the ferromagnetic core of the antenna as well as the sensor plate of a capacitive proximity sensor into the same direction into respective corresponding receptacles of the antenna carrier. 
     The ferromagnetic core is preferably inserted into a groove-shaped or dovetail-shaped receptacle of the antenna carrier in the direction of its longitudinal extension. The ferromagnetic core is formed as a cuboid, wherein the extension in the longitudinal direction is significantly larger than into the other two dimensions perpendicular to its longitudinal extension. Accordingly, the term “insertion of the core in its longitudinal direction” means an insertion direction parallel to the longitudinal extension of the ferromagnetic core. For this purpose, the antenna carrier comprises, in a cross-sectional view, a correspondingly contoured receptacle. The mounting of the ferromagnetic core thus merely occurs through insertion into this receptacle of the antenna carrier. The receptacle of the antenna carrier can be configured in the shape of a groove or a dovetail. 
     Preferably, the ferromagnetic core is formed in two parts, in particular two parts equal in length in the direction of the longitudinal extension of the core, which are arranged one behind the other in the antenna carrier. The ferromagnetic core can be formed by two or more portions located one behind the other in the longitudinal direction. In particular, a separation of the core halfway in the longitudinal direction into two portions of equal length can be effected. A bending region or multiple bending regions are formed by a separation of the ferromagnetic core into two or multiple portions. A damage of the ferromagnetic core due to a slight deformation of the handle is prevented by means of such a bending region. 
     The antenna carrier preferably comprises at least one bending region, wherein the bending region is formed by a material cut-out. The bending regions formed by material cut-out are preferably positioned in such a way that they are aligned with the separating line of a separation of the core into multiple portions perpendicularly to the longitudinal extension of the ferromagnetic core. In other words, the separation of the core, forming a bending region of the core, and the bending region of the antenna carrier can be located in the same plane perpendicular to the longitudinal extension of the ferromagnetic core. The arrangement of such a bending region on the antenna carrier also serves to prevent damages due to a slight deformation of the handle. 
     A coil is preferably wound around the antenna carrier, in which the core is arranged. 
     The outer contour of the connection piece preferably comprises one or more recesses and/or grooves and/or protrusions, which serve as a positioning aid and/or seal during the insertion of the connection piece with the antenna carrier into an antenna chamber of the handle and cooperate with corresponding counterparts on the contour of the antenna chamber. 
     For this purpose, the contact pins can be overmolded with plastic material and thus form a connection piece, wherein the outer contour of the connection piece comprises one or multiple recesses and/or grooves and/or protrusions, which serve as a positioning aid and/or seal during the insertion of the connection piece with the antenna carrier into an antenna chamber of the handle, and which cooperate with corresponding counterparts on the contour of the antenna chamber. The contact pins preferably are overmolded with plastic material and form a connection piece, wherein the connection piece and the antenna carrier can be configured in one piece, in particular from the same material. Thus, connection piece and antenna carrier can be manufactured in one piece and in particular from the same material by a single plastic injection-molding process. 
     The handle preferably comprises an antenna chamber, in which at least the antenna carrier with the ferromagnetic core as well as the coil wound around the core and/or the antenna carrier is accommodated, and wherein the antenna chamber is potted with a potting material after the insertion of the antenna carrier. The antenna is protected against moisture and vibration by potting the antenna chamber with a curable potting material. The antenna chamber thus forms the installation chamber for accommodating the antenna in the handle, which is potted with a potting material after the insertion of the antenna. 
     The contact pins are preferably overmolded with plastic once, or repeatedly, and form a connection piece, a softer material, which serves as a seal of an antenna chamber and/or electronics chamber, can in particular be used in the second plastic overmolding process. Thus, the same plastic material or different plastic materials with different properties can be used in multiple plastic injection-molding processes. In a first plastic injection-molding process, a harder material can be used to form a stable connection piece. This pre-product can be overmolded with a softer plastic material in a second plastic injection-molding process, whereby a seal is formed on the outer side of the connection piece. This seal of the connection piece particularly serves preferably at least as a seal of an antenna chamber in the handle, in which the antenna is arranged. 
     The contact pins preferably are connected with a circuit board, in particular soldered with the circuit board, and the circuit board is accommodated in a trough. The circuit board can be equipped with electronic components. 
     The motor vehicle door handle arrangement preferably comprises a trough for accommodating a circuit board after the insertion of the contact pins and/or a circuit board, wherein the trough is filled with a potting material in particular after the reception of a pre-mounted circuit board, which is connected with the contact pins, in the trough. Particularly preferably, a seal which is arranged on the connection piece serves as a seal of the trough and is arranged in a recess of a wall of the trough in a form-fit manner. The seal of the connection piece can thus, in particular at the same time, form a seal of an antenna chamber and of a trough. 
     The handle preferably comprises an electronics chamber, in which a trough, with a circuit board received therein and/or a plug, are accommodated. 
    
    
     
       An exemplary embodiment of the invention is illustrated in the figures and will be explained hereinafter. The figures show in: 
         FIG. 1  the first manufacturing step during the overmolding of contact pins for the antenna and the proximity sensor; 
         FIG. 2  the second manufacturing step with a further overmolding for the production of the connection piece for the antenna and the proximity sensor; 
         FIG. 3  the antenna carrier as well as the mounting of the ferromagnetic core in the antenna carrier; 
         FIG. 4  the application of the winding on to the antenna carrier; 
         FIG. 5  the mounting of the sensor plate of the capacitive proximity sensor to the antenna carrier; 
         FIG. 6  the placement of the connection piece on the sensor plate at the antenna carrier; 
         FIG. 7  insertion and mounting of the sensor plate, with the connection piece placed-on, in the antenna carrier; 
         FIG. 8  the connection of the contact pins for the antenna and the proximity sensor on the solder points; 
         FIG. 9  an alternative configuration of overmolded contact pins for the production of an integral antenna carrier with connection piece; 
         FIG. 10  a second plastic overmolding of the antenna carrier with connection piece of  FIG. 9 ; 
         FIG. 11  the mounting of the ferromagnetic core on to the antenna carrier of  FIG. 10 ; 
         FIG. 12  the application of a winding on to the antenna carrier of  FIG. 11 ; 
         FIG. 13  the mounting of a sensor plate of a capacitive proximity sensor on the antenna carrier of  FIG. 12 ; 
         FIG. 14  the connection of the contact pins for the antenna and the proximity sensor on the corresponding solder points of the antenna carrier of  FIG. 13 ; 
         FIG. 15  the overmolding process of contact pins for the production of a plug; 
         FIG. 16  the second plastic injection-molding process for the production of the plug; 
         FIG. 17  the circuit board; 
         FIG. 18  the assembly of the plug as well as the antenna carrier and of the plate for locking the circuit board; 
         FIG. 19  the soldering points for soldering the contacts with the circuit board; 
         FIG. 20  the insertion of the circuit board into the trough; 
         FIG. 21  the potting process when potting the trough with potting material; 
         FIG. 22  the assembly of the electronic module in the handle and the insertion of the antenna in the antenna chamber; 
         FIG. 23  the potting process when potting the antenna chamber with potting material; 
         FIG. 24  the mounting of the pad on to the trough; 
         FIG. 25  the mounting process of the outer handle shell on to the handle. 
     
    
    
     The assembly method and production method for the production of such a motor vehicle door handle arrangement will hereinafter be explained at the same time based upon the following description of Figures. 
       FIG. 1 a    shows contact pins  11 ,  12 ,  13 , which are overmolded with plastic in a first production step. The positive mold  14  of the first plastic overmolding of the contact pins  11 ,  12 ,  13  is shown in  FIG. 1   b.  After the first method step of plastic overmolding of the contact pins  11 ,  12 ,  13  using the positive mold  14 , the pre-product  15  of the connection piece is obtained, as shown in  FIG. 1   c.    
     In accordance with  FIG. 2 , the pre-product  15  shown in  FIG. 2 a    is overmolded with plastic in a further method step using the positive mold  16  of  FIG. 2 b   , to form the connection piece  10  of  FIG. 2 c   . The positive mold  16  of the second overmolding process comprises, on the outer side, two grooves  17 ,  18  which extend across respectively three outer sides. The orientation of the two grooves  17 ,  18  extending across respectively three outer sides is in opposite direction. These grooves  17 ,  18  form sealing regions. The outer section  16  forms seals which cooperate with chambers, in which electronic components of the motor vehicle door handle arrangement are arranged, and which seal theses chambers. The assembling and mode of operation is explained below. 
     The contact pins  11 ,  12 ,  13  serve to couple the antenna as well as the sensor plate of the capacitive proximity sensor with the electronics of the motor vehicle door handle. 
     In the illustrated exemplary embodiment of  FIGS. 1 and 2 , the overmolding of the contact pins  11 ,  12 ,  13  occurs in two steps using different types of plastics. For the production of the pre-product  15  of  FIG. 1 , a harder plastic material is used. A second, softer plastic material is used for the production of the complete connection piece  10  in the second plastic injection-molding process using the positive mold  16 , which second material is suitable to serve as a sealing element and which thusly has a greater deformability than the plastic material of the pre-product  15 . 
     In an alternative, which is not illustrated, the connection piece  10  is produced in a single plastic injection-molding process using a plastic material suitable as a sealing element. In this case, the contact pins  11 ,  12 ,  13  are overmolded with the plastic material suitable as a seal in a single plastic injection-molding process. 
       FIG. 3  shows the antenna carrier  20  produced as a plastic injection-molded part, into which the ferromagnetic core  21  of the antenna is placed. The ferromagnetic core  21  is arranged in a form-fit manner in the antenna carrier  20  and, to that end, is inserted into the antenna carrier  20  from the right side in the image plane of  FIG. 3 . On the outer side, the ferromagnetic core  21  has grooves  22 ,  23 , which are pushed over corresponding protrusions  24  on the inner side of the antenna carrier  20 . By means of the protrusions  24  of the antenna carrier  20  which engage into the grooves  22 ,  23  of the ferromagnetic core  21 , the ferromagnetic core  21  is arranged in a form-fit manner in the antenna carrier  20 . 
     The ferromagnetic core  21  is divided in the middle thereof, and thus configured in two parts. The antenna carrier  20  comprises material cut-outs  25 , which are aligned with the separating line between the two parts of the ferromagnetic core  21 . Through the weakening  25  of the material of the antenna carrier  20  and the central separation of the ferromagnetic core  21 , a bending region is generated, which is used to permit slight deformations of the antenna carrier  20  due to the actuation of the handle by a user without that this would lead to a damaging of the ferromagnetic core  21 . 
       FIG. 4  shows the application of the winding  26  on to the antenna carrier  20  and the ferromagnetic core  21  arranged in the antenna carrier  20 . 
       FIG. 5  shows the mounting of the sensor plate  27  of the capacitive proximity sensor in the antenna carrier  20 . For this purpose, the sensor plate  27  is inserted into a corresponding receptacle on the antenna carrier  20  against the insertion direction of the ferromagnetic core  21 , as shown in  FIG. 5 . For this purpose, the antenna carrier  20  comprises a corresponding receiving area on its bottom side, in which the sensor plate  27  is arranged after being mounted in the antenna carrier  20 . 
     The sensor plate  27  and the antenna carrier  20  comprise latching elements  28  to latch the sensor plate  27  on the antenna carrier  20  in a pre-mounting position. This pre-mounting position of  FIG. 5  serves to mount the connection piece  10 , in that the recess on the sensor plate contact pin  13  of the connection piece  10  is placed on to the upwardly-bent contact  29  of the sensor plate  27 , as shown in  FIG. 6 . 
     In the exemplary embodiment shown, the latching elements  28  are created by the outer-side lugs on the sensor plate  27 , which engage into corresponding recesses in the lateral guidance for the sensor plate  27  on the antenna carrier  20  in the pre-mounting position of  FIG. 5 . Since the antenna carrier  20  is formed of a plastic injection-molded part and correspondingly comprises a reversible deformability, the sensor plate  27  can be inserted from the pre-mounting position of  FIG. 5  further in the direction towards its final position easily and without damage to the sensor plate  27  or the antenna carrier  20 . The latching elements can likewise be configured in a kinematically reversed manner, in that lugs on the lateral guidance for the sensor plate  27  on the antenna carrier  20  engage into correspondingly positioned recesses on the lateral edges of the sensor plate  27  in the pre-mounting position of the sensor plate  27 . 
     After placing the contact  13  onto the upwardly-bent contact  29  of the sensor plate  27 , the sensor plate  27  with the connection piece  10  placed thereon is inserted into the antenna carrier  20  into its final position in accordance with the representation in  FIG. 7 . In the final position of the sensor plate  27  with the connection piece  10  placed thereon, the antenna contact pins  11 ,  12  come into contact with the antenna. 
       FIG. 8  shows the soldering points in a circled manner. Accordingly, the contact pins  11 ,  12 ,  13  are soldered at the points marked in  FIG. 8 . As a result, a permanent electrically-conducting connection between the contact pins  11 ,  12 ,  13  and the antenna as well as the sensor plate  27  is established. 
     Thus, upon the soldering of the contact pins  11 ,  12 ,  13 , a pre-assembled antenna assembly  50  is obtained from the antenna carrier  20  and the connection piece  10  attached thereto, as well as the above-described further components. 
       FIG. 9  shows an alternative configuration of the antenna carrier. In the alternative embodiment of  FIG. 9 , the contact pins  11 ′,  12 ′,  13 ′ are overmolded, in a first plastic injection-molding process, using the positive mold  14 ′ shown in  FIG. 9 . Accordingly, in the exemplary embodiment of  FIG. 9 , the antenna carrier including the base of the connection piece as a pre-product  15 ′, are produced in one piece and from the same material by plastic overmolding of the contact pins  11 ′,  12 ′,  13 ′. 
     As shown in  FIG. 10 , a second overmolding process using the positive mold  16 ′ is performed with a softer plastic material, which is suitable as a seal. Thus, the production of the antenna carrier  20 ′ with the sealing element  16 ′ configured in one piece as antenna carrier  20 ′ with integrated connection piece, the geometric design and function of which corresponds to the embodiment explained above on the basis of  FIGS. 1 to 8  with regard to the grooves  17 ′,  18 ′ arranged on the outer side. Alternatively, overmolding of the contact pins  11 ′,  12 ′,  13 ′ can also occur in a single process with a plastic material suitable as a sealing element. 
       FIG. 11  shows the mounting of the ferromagnetic core  21  in the antenna carrier  20 ′. 
     According to  FIG. 12 , the winding  27  is now applied on to the antenna carrier  20 ′ and the ferromagnetic core  21 . The antenna carrier  20 ′ in turn comprises material weaknesses  25  for the formation of a bending region. The ferromagnetic core  21  is likewise divided in the middle, so that the central separation of the ferromagnetic core  21  and the recesses  25  in the antenna carrier  20 ′ are aligned. In a non-illustrated alternative, the ferromagnetic core is configured in one piece. 
     According to  FIG. 13 , the sensor plate  27  of the capacitive proximity sensor is now inserted from below into the antenna carrier  20 ′. In this case, the insertion occurs from below, since an insertion from the front is not possible due to the integral configuration of the antenna carrier  20 ′ with the connection piece. 
       FIG. 14  in turn shows the soldering points for soldering the contact pins  11 ′,  12 ′,  13 ′ with the corresponding antenna contacts or the contact  29  on the sensor plate  27 . 
     The antenna assembly  50 ′ composed of the antenna carrier  20 ′ and the connection piece, produced in accordance with  FIGS. 9 to 14 , corresponds to the final result of the antenna assembly  50  that has been produced in accordance with the previously-illustrated method steps of  FIGS. 1 to 8 . 
     The antenna of the antenna carrier assembly serves to remotely control the locking system by a user, and to forward the corresponding radio signals to the electronics on the circuit board  40  of  FIG. 17 , as will be explained below. The sensor plate  27  of the capacitive proximity sensor serves to detect the gripping behind the handle by a user, in order to thereby activate the electronics of the motor vehicle door handle arrangement. 
     A plug is provided for the coupling of the electronics of the motor vehicle door handle arrangement with the motor vehicle, the production of which plug is explained on the basis of  FIGS. 15 and 16 . For this purpose, contact pins  31 ,  32  of  FIG. 15 a    are overmolded in a first plastic injection-molding process using the positive mold  33  of  FIG. 15 b    to produce the pre-product  34  of  FIG. 15 c   . After that, this pre-product  34 , which is shown in  FIG. 16 a   , is overmolded in a further plastic injection-molding process using the positive mold  35  of  FIG. 1 b   , to produce the plug  30  according to  FIG. 16   c.    
     In this two-step plastic injection-molding process of  FIGS. 15 and 16 , different plastic materials are employed in the respective injection-molding process. In an alternative, which is not shown, the production process for the production of the plug  30  can occur in a single plastic injection-molding process during the overmolding of the contact pins  31 ,  32 . In this case, the plug is made in one piece and from the same material. 
       FIG. 17  shows the circuit board  40 , equipped with the electronic components, of the motor vehicle door handle arrangement. The equipped circuit board  40  serves for processing and forwarding the signals of the antenna as well as of the sensor plate  27 , and for coupling with the vehicle electronics via the plug  30 . 
       FIG. 18  shows the process of mounting the plug  30  by placing-in from below into the circuit board  40 , as well as the mounting of the pre-assembled antenna assembly  50  on the circuit board  40 . The plug  30  is mounted by plugging-in from below into the circuit board  40  into corresponding contact points. The mounting occurs through the plugging-in of the contact pins  31 ,  32  from below into corresponding through-openings in the circuit board  40 . 
     The antenna assembly  50 , in turn, is plugged into corresponding recesses of the circuit board  40  from the upper side. The mounting occurs by the plugging-in of the contact pins  11 ,  12 ,  13  of the antenna assembly  50  from above into corresponding through-openings in the circuit board  40 . 
     As a result, the coupling of the contact pins  31 ,  32  of the plug  30  with the circuit board as well as further the coupling of the contact pins  11 ,  12 ,  13  of the antenna assembly  50  with the circuit board  40  follows. Furthermore, a locking plate  41  with contact pins is placed on to the circuit board  40  from above and inserted into corresponding receptacles of the circuit board  40 . As a result, the module  60  composed of the antenna assembly  50  including the antenna and the winding as well as the connection piece, the circuit board  40  and the plug  30 , is achieved, as shown in  FIG. 18 . In this module  60 , the circuit board  40  thus forms a load-bearing component of the electronics module  60 . 
       FIG. 19  shows the soldering points for the connection of the contact pins  11 ,  12 ,  13 ,  31 ,  32 , as well as of the plate  41  for the locking on the circuit board  40 . The soldering points are marked with circles in  FIG. 19 . The soldering of all contact points on the circuit board  40  occurs on the upper side of the circuit board  40 , as shown in  FIG. 19 . In other words, the soldering of the contact pins on the circuit board  40  occurs from the same side, although the plug  30  is plugged into the circuit board  40  from another side than the antenna assembly  50  and the locking plate  41 . Thus, the production process of the electronic module  60  is completed by the process of soldering the contact points on the circuit board  40 . 
     The module  60  thus includes the antenna carrier  20 , which receives the antenna with the ferromagnetic core and the coil, as well as the sensor plate, the connection piece  10 , through which electrically-conducting contact pins are guided from the antenna and the sensor plate to the circuit board  40  equipped with the electronic components, and are connected to this board, wherein the circuit board  40  is further connected with the plug  30 , which serves to produce the electrical contacts for the electronic assembly of the module  60 , and wherein the circuit board  40  is connected with the electrical contact pins of the plug. The circuit board  40  forms a load-bearing component of the module  60  here. 
       FIG. 20  shows the further mounting of the pre-assembled electronic assembly in the form of the module  60  with the placing-in into the trough  70 , which serves to accommodate the circuit board  40 . The trough  70  thus completely receives the circuit board  40  including the soldered contacts. For the positioning of the electronic assembly  60  in the trough  70 , the trough  70  comprises corresponding positioning aids  71 ,  72 , which form a form-fit with corresponding recesses on the peripheral edges of the circuit board  40 . Thus, the positioning of the module  60  occurs through the positioning aids  71 ,  72  on the trough  70 , which form a form-fit with corresponding counter-parts on the circuit board  40 . The fixing of the entire arrangement is effected in that a lug  73  on the trough  70  engages behind an undercut  36  on the plug  30 . The trough  70  is being fixed to the plug  30  by this clipping in accordance with  FIG. 20 . The positioning aids  71 ,  72  and the lug  73  on the trough  70  as well as the undercut  36  on the plug  30  are shown in an enlarged detailed view of  FIG. 20 . 
     In the exemplary embodiment shown, the positioning aids  71 ,  72 , which form a form-fit, are formed by bulges on the inner side of the trough  70 , which engage into recesses on the peripheral edges of the circuit board  40 . A reverse configuration is likewise possible, in which one or multiple lugs or projections on the peripheral edges of the circuit board engage into corresponding recesses of the trough, and thereby produce a form-fit which serves as a positioning and mounting aid. 
     The potting process of the trough  70  with the circuit board  40  arranged therein is shown in  FIG. 21 . In this potting process, the trough  70  with the circuit board  40  arranged therein is being potted with a curing potting material. This potting material serves to protect the electronic components of the circuit board  40  in the trough  70 , and thus forms a protection against moisture as well as a damping element against vibration at the same time. 
     The sealing of the trough  70  occurs through the seal  16 . The trough  70  comprises a recess, in which the seal  16  with the groove  17  is arranged in a form-fit and force-fit manner. The wall of the trough  70  is arranged in groove  17  of the seal  16  in a form-fit manner. At the same time, a clamping effect between the wall of the trough  70  and the seal  16  is generated. For this purpose, the seal  16  is formed from a plastic material which is suitable as a seal and reversibly deformable. The trough groove  17  of the seal  16  and the recess of the trough  70  are adapted to one another accordingly. The trough groove  17  thus forms a positioning aid during the placing-in of the circuit board  40  of the electronic module  60  into the trough  70 . Through the clamping effect of the seal  16  in the recess of the wall of the trough  70 , the circuit board  40  is, at the same time, secured and fixed against floating during the potting process. The potting material cures after the potting process. The potting material forms a protection of the circuit board  40  and of the soldered contacts against moisture. Furthermore, the potting material serves as a damper against vibration. 
     With the potting material cured in the potted trough  70 , the electronics assembly  75  is obtained for the further mounting in the handle of the motor vehicle door handle arrangement. The mounting of the assembly  75  in the handle  80  of the motor vehicle door handle arrangement is explained on the basis of  FIG. 22 . 
     The pre-assembled assembly  75  including the trough  70  potted with the potting material, and the plug  30 , is inserted into the handle  80  in reverse orientation, as can be discerned in  FIG. 22 . The placing-in occurs in such a way that the antenna assembly  50  in the antenna chamber  81  is arranged in the handle  80 , while the trough  70  is arranged in the electronics chamber  83  in the handle  80  at the same time. 
     The sealing of the antenna chamber  81  in the handle  80  likewise occurs by means of the seal  16 . The wall of the antenna chamber  81  comprises a recess  82 , in which the seal  16  with the groove  18  is arranged in a form-fit and force-fit manner. The seal  16  comprises the second groove  18 , which serves as an antenna chamber groove, on the outer side. The antenna chamber groove  18  is formed as a circumferential groove on the outer side on the seal  16 , just like the trough groove  17  is. Due to the fact that the orientation during the insertion of the seal  16  into the trough  70  is opposite to the orientation during the insertion of the seal  16  into the antenna chamber, the grooves  17 ,  18  of the seal  16 , which extend across respectively three outer sides of the seal  16 , are also arranged in opposite directions. 
     The wall of the antenna chamber  81  is arranged in the groove  18  of the seal  16  in a form-fit manner. At the same time, a clamping effect between the wall of the antenna chamber  81  and the seal  16  is produced. For this purpose, the seal  16  is formed, as explained above, from a reversibly deformable plastic material which is suitable as a seal. The antenna chamber groove  18  of the seal  16  and the recess  82  of the antenna chamber  81  are adapted to one another accordingly. Thus, the antenna chamber groove  18  at the same time forms a positioning aid during the insertion of the antenna assembly  50  of the electronic module  60  into the antenna chamber  81 . At the same time, the antenna assembly  50  is secured and fixed against floating during the potting process, which is explained below, by means of the clamping effect of the seal  16  in the recess  82  of the wall of the antenna chamber  81 . The potting material cures after the potting process. 
     After the insertion of the pre-assembled assembly into the handle  80 , the antenna chamber  81  is potted with a potting material, as indicated in  FIG. 23 . As the trough  70  is reversibly oriented now, it can be discerned that the potting of the trough  70  and of the antenna chamber  81  occurs from opposite directions. The potting of the antenna chamber  81  with potting material in turn serves to protect the antenna assembly  50  against moisture and vibration, since the potting material cures in the antenna chamber  81 . The potting material thus forms a protection of the antenna assembly  50  and the soldered contacts against moisture. Furthermore, the potting material serves as a damper against vibration. 
     Subsequently, a flexible pad  85  is bonded on to the trough  70 , as can be discerned in  FIG. 24 . The pad  85  serves for the sealing against water and ensures the functioning of the capacitive sensor plate  41  for the unlocking. As can be discerned in  FIG. 24 , the largest part of the trough  70  is covered by the pad  85 . Possible is both, a covering of the trough  70  over the entire surface, and a partial covering of the trough  70  by the pad  85 . The flexible pad  85  serves the dampening of vibration at the same time. 
     Subsequently, the outer shell  90  is mounted on the handle  80 , as shown in  FIG. 25 . The rotary axis  101  can also be discerned in  FIG. 25 , around which the entire arrangement of  FIG. 25  can be rotated in the mounted state. For this purpose, the entire handle arrangement  100  is mounted in a corresponding receptacle in the body of a motor vehicle. The handle arrangement  100  illustrated in  FIG. 25  is mounted in a corresponding housing, or directly into the motor vehicle body. The rotary axis  101  of the handle arrangement  100  is usually located at the front in the direction of travel, so that the handle hook  102  on the rear end of the handle arrangement  100  can be pulled towards the outer side of the motor vehicle, and acts on the door lock via a corresponding coupling, and makes an opening of the motor vehicle door possible if the door lock is unlocked. However, the arrangement of the handle arrangement  100  of  FIG. 25  is arbitrary. In particular, the arrangement can also be made reversibly on the motor vehicle, or vertically. 
     Furthermore, the outer shell  90  comprises a recess  91 , through which a key can be inserted into a lock, which is not shown in  FIG. 25 . In the mounted state, the door lock of the motor vehicle is located aligned behind the recess  91  of the outer shell  90 . 
     LIST OF REFERENCE CHARACTERS 
     
         
           10  connection piece 
           11 ,  12 ,  13  contact pins 
           11 ′,  12 ′,  13 ′ contact pins 
           14 ,  14 ′ positive plastic injection mold 
           15 ,  15 ′ pre-product of connection piece 
           16 ,  16 ′ seal 
           17 ,  17 ′ trough groove 
           18 ,  18 ′ antenna chamber groove 
           20 ,  20 ′ antenna carrier 
           21  ferromagnetic core 
           22 ,  23  grooves 
           24  protrusion 
           25  recess 
           26  winding 
           27  sensor plate 
           28  latching elements 
           29  contact 
           30  plug 
           31 ,  32  contact pins 
           33  positive plastic injection mold 
           34  pre-product of the plug 
           35  positive plastic injection mold 
           36  undercut 
           40  circuit board 
           41  locking plate 
           50 ,  50 ′ antenna assembly 
           60  electronics module 
           70  trough 
           71 ,  72  positioning aids 
           73  lug 
           75  electronics assembly 
           80  handle 
           81  antenna chamber 
           82  wall 
           83  electronics chamber 
           85  pad 
           90  shell 
           91  recess 
           100  handle arrangement 
           101  rotary axis 
           102  handle hook