Abstract:
A closing device has a key-operable closing cylinder which is simultaneously a component of a pusher and serves as a hand-operated thrusting device for operating locking elements. A central locking system can be used to actuate a lever with a drive. Malfunctions result when the central locking lever, moved to a secured position by the drive of the central locking system, blocks the components in the closing cylinder such that the key cannot be inserted into the closing cylinder when a pushing arm which is rotated by the closing cylinder is in an inactive position and blocked. This is avoided by using coupling elements which are provided between the supporting points of the lever allocated to the central locking system and also between the supporting points of the pushing arm. In accordance with the rotated position of the key in the closing cylinder, the coupling elements change between coupling and uncoupling positions. The lever is uncoupled when the pushing arm is in the inactive position. Accordingly, movement of the lever ceases, this movement caused by the drive of the central locking system, thus preventing engagement of the pushing arm.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a closing device of the type specified in the preamble of claim 1. The closing cylinder is a component of a pusher which comprises further components. Similar to the way in which a closing cylinder can be divided into a cylinder core and a cylinder guide, this division is continued in the pusher, and this is why one can refer to radially inner core parts and radially outer sleeve parts of the pusher. 
     2. Description of the Related Art 
     In the known closing device of this kind (DE 44 08 910 A1) a pusher base is rotatably supported at the inner end of the pusher and is axially moved upon pushing. The actuation of the locking elements is realized by a pusher arm which is provided on a pusher base and upon axial pushing movement of the pusher contacts a first locking element and moves it. The core parts of the pusher are fixedly connected for common rotation to the pusher base and can be switched by the key between two rotational positions. In the known device these result in two differently acting angular positions of the pusher arm, i.e., one position aligned with the first locking element and thus active during pushing and one non-aligned position that is inactive during pushing. This device has been successfully used; however, there are problems when this device is to be used together with a central locking device which in the following is shortly referred to as “CL device”. 
     A CL device is desirable when the present locking device is to be controlled together with further locking devices. This is necessary when the device mentioned in the preamble of claim 1 is arranged at the rear of a vehicle and further locking devices are provided at the doors of the vehicle which have their own locks. Then a CL device is used acting on a CL lever in each one of the different locking devices and switching it between two pivot positions, i.e., a secure position in which the CL device acts on the locks of the different locking devices such that they cannot be actuated by their respective actuator and further an unsecured position in which these locks can be actuated by their actuator. 
     When combining such a CL lever with the closing device mentioned in the preamble of claim 1, a lever base is to be used which belongs to the CL lever and is rotatably supported at the inner end of the pusher adjacent to the aforementioned pusher base. In such a combination with the known closing device the CL lever and the pusher arm are always synchronously movable. This results in operational disruptions in that rotational position of the core parts in which the pusher arm is in its inactive position and the CL lever is thus in its secured position. In this case, in order to avoid manipulations, the pusher base is to be blocked. When the CL device is now switched, jamming in the interior of the components of the known closing device can occur. This jamming action can result in that the key cannot be inserted into the closing cylinder. This results in considerable operational disruptions. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a reliable closing device of the aforementioned kind in which the aforementioned operational disruptions can no longer occur. This is inventively achieved by the measures characterized by the following particularities. 
     The pusher base which comprises the pusher arm actuating the locking elements is connected by coupling means with the lever base of the CL lever which is controlled by the CL drive. These coupling means are now activated or deactivated by the core parts of the pusher arm. In the secured position of the core parts already mentioned before in which the pusher arm is in its inactive position, the coupling means are in the decoupled position. Now the CL lever is free and can be moved by the CL drive between the secured and unsecured positions without this having an effect on a positional change of the pusher arm. The CL lever is in “free-wheeling” state. Accordingly, the aforementioned jamming of the components of the device according to the invention can no longer occur. 
     This is changed only when the core parts are moved by the key into their other rotational position which is referred to as the “normal position”. In this case, the coupling means between the pusher base and the lever base are activated, and this provides the desired fixed connection for common rotation between the CL lever and the pusher arm. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further advantages of the invention result from the further claims, the following description, and the drawings. In the drawings one embodiment of the invention is represented. It is shown in: 
     FIG. 1 a schematic side view of the device according to the invention; 
     FIGS. 2 and 3 a front view and a back view of the device illustrated in FIG. 1, viewed respectively in the direction indicated with II and III; 
     FIG. 4 an axial section of the device of FIG. 1; 
     FIG. 5 a cross-sectional view of the device of FIG. 4 along the section line V—V wherein the central components have been omitted; 
     FIG. 6 a cross-section of the device along the section line VI—VI of FIG. 4 with omission of some components; 
     FIGS. 7 a  and  7   b  a further cross-section of the device along the section line VII—VII of FIG. 4, wherein the components are shown in two different operational positions when the core parts of the device are in a first rotational position, i.e. in the aforementioned secured position; 
     FIGS. 8 a  and  8   b  show the corresponding cross-sections in two further operational positions of the components when the core parts are in a second rotational position, i.e., their “normal position”; and 
     FIG. 9 shows in a representation corresponding to that of FIG. 8 a  a fifth operational position of the components in a third rotational position of the core parts, i.e., a “special position”. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     The device comprises a closing cylinder  20  actuated by a key  14  which is integrated into a pusher  10  and, as shown in FIG. 1, is a pushing member for actuating the locking elements  15 . The closing cylinder  20  has a conventional configuration. It is comprised first of a cylinder core  21  with lock elements  25 , indicated in dash-dotted lines in FIG. 4, which are controlled by the inserted key  14 . Furthermore, the closing cylinder  20  comprises a cylinder guide  22  for rotationally supporting the cylinder core  21  which has lock channels  26  etc. for the lock elements  25 . Both components of the locking cylinder  20  have axial extensions  23 ,  24  which are also components of the pusher  10 . This includes a bolt  23  fixedly connected for common rotation by an axial coupling  27  with the cylinder core  21  in a coupling state and a bolt guide  24  as an extension of the cylinder guide  22 . The bolt guide  24  is forced against the end face of the cylinder guide  22  by an axial spring force of a freely moving spring  29  wherein between the end faces pressed against one another an axial leverage profile  28  is provided. Upon a forced rotation of the locking cylinder  10  by burglary tools, the leverage profile  28  causes the axial coupling to open. This is disclosed in detail in patent document DE 44 08 910. 
     In this way, the pusher  10  can be divided, on the one hand, into radially inner core parts  11  which are normally rotatable by the key  14  and which include the cylinder core  21  as well as the bolt  23 . The core part  11  comprises also the cylinder head parts  32  at the forward end face which surrounds the opening  34  of the key channel and which provides reinforcement. The components of the core parts  11  can be moved by the two key rotations  40  of, for example, 90° and  40 ′ of, for example, 60° between three rotational positions  41 ,  42 ,  43  which are illustrated in FIG. 2 with the aid of the three rotational positions of the key channel opening  34 . 
     Furthermore, the pusher  10  can be divided into radially outer sleeve parts  12  which serve for receiving the aforementioned core parts  11  and which include firstly the aforementioned cylinder guide  22  and the bolt guide  24 . Also included is a bushing  13  which projects axially past the cylinder guide  22  and the bolt guide  24  and is provided with a flange member  17  at its end. The aforementioned free spring  29  is supported between the flange member  17  and an inner collar of the bolt guide  24 . The bushing  13  is provided with a cover  35  at its face that is showing and is received in a housing  18  so as to be axially slidable but not rotatable. The housing  18  is mounted with cellular rubber seals in a door panel  19  indicated in dash-dotted lines in FIG.  4 . 
     At the inner end of the sleeve part  12  a pusher base  30  is positioned which is provided with a pusher arm  31 . The bolt end  33  of the corresponding bolt  23  being part of the core parts  11  is used for its support. As can be seen in FIG. 3, a rotation of the core parts  11  rotates the pusher arm  31  between two angular positions  36 ,  37 . In a first position  36 , shown in solid lines in FIG. 3, the pusher arm  31  is axially aligned relative to an actuator arm  16 , best seen in FIG. 1, that is a part of the aforementioned first locking element  15  which in the present case is a deflecting lever. As can be seen in FIGS. 4 and 5, the pusher  10  is normally secured in its extended position, shown in solid lines in FIGS. 1 and 4, by two pusher springs  38  which are supported on end faces of the cover  35  and the housing  18 . This position is defined by the inner stops  39  between the bushing  13  and the housing  18 . 
     Upon axial actuation of the pusher  10  with a finger in the direction of the arrow  80 , as can be seen in FIG. 1, the bolt end  33  is moved into the inserted position  33 ′ represented by dash-dotted lines. The pusher base  30  is entrained so that its pusher arm  31  is moved into the inserted position  31 ′ also shown in dash-dotted lines. In the aforementioned angular position  36  of FIG. 3 the pusher arm  31 ′ contacts the working arm  16  of the deflecting lever  15  and moves this arm into the operational position  16 ′ illustrated in dash-dotted lines in FIGS. 1 and 4. The deflecting lever is thus pivoted into its operational position  15 ′ shown in dash-dotted lines and carries out a movement illustrated by the actuating arrow  45 , for example, via the rod  44  indicated in FIG. 1 acting onto the locking elements of the device (not shown). The angular position  36  of the pusher arm  31  is thus an active position of the pusher base  30 . 
     However, when the second angular position  37 , shown in a dash-dotted line in FIG. 3, of the pusher base  31  is present, then the dash-dotted pusher arm  31  does not contact the operational arm  16  of the deflecting lever  15 . Thus, no actuation of the locking elements occurs. Accordingly, the angular position  37  is an “inactive position” of the pusher arm  31 . 
     As can be seen in FIGS. 1,  3 , and  4 , the deflecting lever  15  is rotatably supported at  47  on a projection of the housing  18 . A return spring  46  returns the deflecting lever from the operational position  15 ′ again into its rest position  15  of FIGS. 1 or  4 . At the inner bolt end  33  of the pusher lever  51  is furthermore rotatably supported with its lever base  50 . This lever  51  is connected by a joint bracket  53  with a pusher member  52  of the already aforementioned CL drive  54  of a central locking device cooperating with the device, so that the lever  51  in the following will be referred to as “CL lever”. The CL lever  51  itself can be pivoted between the two pivot positions  56 ,  57  indicated with  56 ,  57  in FIG.  3 . The pivot angle  55  between these two positions  56 ,  57  is identical with the pivot angle between the two aforementioned angular positions  36 ,  37  of the pusher arm  31 . This will be explained in more detail with the aid of FIGS. 8 a  and  8   b.    
     A particularity of the invention is that between the lever base  50  and the pusher base  30  special coupling means  60  are arranged which are switched between the coupling-active position according to FIGS. 8 a  and  8   b,  on the one hand, and the coupling-inactive position of FIGS. 7 a,    7   b  by key activation of the core parts  11  of the pusher  10 . The coupling means  60  have in the shown embodiment the following special construction as will be explained in connection with FIG. 7 a.    
     In FIG. 7 a  the core parts  11  are in a rotational position  41  which is determined by a vertical position of the key channel opening  34 . This refers to the already aforementioned “secured position”. It is firstly characterized in that the pusher arm  31  is in the aforementioned inactive position  37 . This angular position  37  is fixed by blocking of the pusher base  30 . For this purpose, a cam  63 , shown in FIG. 7 b,  is provided which has two flanks  61  and  62 . 
     The cam  63  projects radially past the circumferential surface  64  of the bolt  23 . One of its flanks  61  forms a radial shoulder  61  which in the secured position  41  rests at a counter shoulder  58  of the pusher base  30  shown in FIG. 7 a.  This counter shoulder  58  is one end of an annular recess  69  provided at the pusher base  30  which is provided in the area of the bearing location on the bolt  33 . This prevents a movement of the pusher arm  31  by burglary tools from its inactive position  37  into an active position  36  which is, for example, illustrated in FIG. 8 b.  Furthermore, in the secured position of FIGS. 7 a,    7   b  such a movement of the pusher arm  31  via the CL lever  51  is not possible because of the already mentioned inactive position of the coupling means  60 . 
     The coupling means comprise, as will be explained with the aid of FIG. 7 a,  a radial guide  71  in the pusher base  34  for a coupling member  70  which in the present case has a round profile and is comprised of a roll. The diameter of the roll  70  is greater than the radial dimension of the guide  71 . The circumferential surface  64  has depressions at two defined locations in the form of a respective groove  65  and  66 . In the secured position  41 , the first groove  65  is radially aligned with the roll  70  in the pusher base  30 , and the roll is forced into the groove  65  by the counter control surface  73  illustrated in FIG. 7 b.  This counter control surface  73  belongs to a ring segment  72  seated on the lever base  50  which projects into an annular recess  67  in the pusher base  30 . The CL lever  51  can now be pivoted by the LC drive  54  of FIG. 3 between the two pivot positions  56 ,  57 , illustrated in FIGS. 7 a  and  7   b,  but because of the radially depressed position of the roll  70  the adjusting movement  68  and  68 ′ between the two positions  56 ,  57  is not transmitted onto the pusher arm  31 . The pusher arm  31  remains instead in the inactive position  37  illustrated in FIGS. 7 a  and  7   b.    
     This inactive angular position  37  can be determined by catch elements  74 ,  75 , illustrated in FIG. 7 a,  which are comprised of a springy catch tooth  74  at the pusher base  30  and a complementary catch notch  75  at the sleeve part. The sleeve part  12  with the catch notch is in the form of an axial extension  77  of the bolt guide  24 , illustrated in FIG. 4, which engages a cutout  78  of the pusher base  30 . 
     Similar catch elements  74 ′ through  76 ′ act, according to FIG. 6, on the lever base  50 . The lever base  50  also has a cutout  78 ′ for the axial extension  77  of the sleeve part  12  of the pusher  10 . The lever base  50  has a springy catch tooth  74 ′ which engages selectively one of the two catch notches  75 ′,  76 ′ of the sleeve extension  77  when the lever  51  is moved by the CL drive  54  according to the movement arrows  68 ,  68 ′ between its two pivot positions  57 ,  56 , represented in FIGS. 7 a  and  7   b.  The pivot positions  56 ,  57  can be determined by the rotational end stops between the lever base  50  and the pusher base  30 . For this purpose, an axial projection  81  seated on the lever base  50  can be used which cooperates in the pivot position  56  of the CL lever  51  with a first end face  49  of the pusher base  30 . 
     When the core part  11  is moved by the key into its second rotational position  42 , which is defined as the “normal position”, the coupling means  60 , as has been mentioned before, are positioned in their active coupling position. In the shown embodiment, this is achieved by a different radial position of the roll  70  which is achieved by the aforementioned radial stepping of the control surfaces  64 ,  65 ,  66  at the bolt end  33 . 
     As shown in FIG. 8 a,  in the normal position  42  the groove  65 , which in the secured position of FIG. 7 b  is active for receiving, is rotated away. Upon rotation about the angle  40  in FIG. 2 a slanted surface has become active at the limitation of the groove  65  so that the roll  70  is radially lifted in its radial guide  71 . In FIG. 8 a,  it is already on the circumferential surface  64  of the bolt end  33  and projects into a radial cutout  79  which, as shown in FIG. 8 b,  is provided in the radially inwardly facing surface  73  of the ring segment  72 . This provides a fixed coupling for common rotation between the pusher base  30  and the lever base  50 . 
     When in this normal position  42  of the bolt end  33  the CL lever  51  is moved by the CL drive  54  of FIG. 3 in the sense of the movement arrows  68 ,  68 ′ illustrated in FIGS. 8 a  and  8   b  between its two positions  56 ,  57 , then the pusher arm  31  is entrained and performs analog movements illustrated by arrows  83 ,  83 ′. Even when the CL lever  51  is moved into the pivot position  56  illustrated in FIG. 8 b,  the roll  70  remains in engagement at the recess  79  because of the controlling circumferential surface  64 . The coupling means  60  still remains in its active position. Accordingly, the pusher arm  31  is in its active angular position  36 . Accordingly, the corresponding pivot position  56  of the CL lever  51  is still an “unsecured position” because then, as already disclosed in connection with FIGS. 1 and 3, an actuation of the pusher  10  in the direction of arrow  80  results in an actuation  45  of the locking element  15 . However, when in the normal position  42  of the bolt end  33  the CL lever  51  is in the other pivot position  57 , the afore-described inactive position  37  of the pusher arm  31 , which is fixedly coupled thereto for common rotation, is present. This pivot position  57  is thus the “secured position” of the CL lever  51 . 
     As already mentioned in connection with FIG. 2, the closing cylinder  20  can be moved by the key also into a third rotational position  43  by which the bolt end  33  is moved into its rotational position  43  illustrated in FIG.  9 . This position is referred to in the following as “special position”. This special position  43  is of interest when the vehicle via the CL device has been transferred into the secured position for all different locking devices, including the respective device at the rear of the vehicle. The vehicle is parked. Then, as already described before, the CL lever  51  is in the secured position  57  illustrated in FIG.  9 . This is the secured position of FIG. 7 a  in which the pusher arm  31  is in the inactive position  37 . It may happen that the owner of the vehicle wants to open the trunk, for example, in order to remove something from the vehicle. For this purpose, it is sufficient to move the closing device at the rear of the vehicle with the key into its special position  43  in order to open the trunk lid of the vehicle. When this is performed, as illustrated in FIG. 9, the secured locks of the other closing devices of the vehicle remain in their secured position. No switching of the CL device takes place. The CL lever  51  also remains in its secured position  57  in this special position  43  of FIG. 9 of the closing device. 
     The rotational actuation of the bolt end  33  indicated by  82  in FIG. 9 moves the cam  63  with its other flank  62  against a radial counter stop surface  59  of the pusher base  30 . This counter stop surface  59  is positioned at the other end of the annular recess  69 . Upon rotation  82  the pusher base  30  is also rotated by the cam  63  until its pusher arm  31  is moved into the active angular position  36  illustrated in FIG.  9 . Then an actuation  80  of the pusher  10  in the direction of arrow  80  of FIG. 1 is again effective. This results in an actuation  45  of the locking element  15 . This rotation  82  results automatically in a decoupling between the pusher base  30  and the lever base  50  which can be seen from the position of the coupling means  60  illustrated in FIG.  9 . 
     Upon rotation  82  the circumferential surface  64  of the bolt end  33  has been rotated to such an extent until the aforementioned second groove  66  in the bolt end  33  is radially aligned with the roll  70 . At the same time, the radial recess  79  has been moved away from the roll  70  until the radially inwardly projecting counter control surface  73  of the ring segment  72  forces the roll  70  into the groove  66 . This results in a similar decoupling position of the coupling means  60  as in the secured position  41  of FIGS. 7 a,    7   b  but with the difference that now the second groove  66  serves for receiving the roll  70  instead of the first groove  65  provided thereat. 
     The aforementioned axial projection  81  and the lever base  50  can cooperate with a second end face  48  of the pusher base  30 , see FIG. 9, so that the pivot position  57  of the CL lever  51  is limited. Also, the afore-described catch elements secure the respective positions  36 ,  57  of the pusher arm  31 , respectively, the CL lever  51 . As shown in FIG. 9, the springy catch tooth  74  of the pusher base  30  engages the second catch notch  76  of the axial sleeve extension  77 . 
     While the secured position  41  and the normal position  42  are rest positions of the core parts  11  of the pusher  10 , wherein the key  14  can be inserted into the cylinder core  21  or removed therefrom, this is not the case in the special position  43  of FIG.  9 . Upon counter rotation  82 ′ by an angular amount of approximately 30°the roll  70  first reaches alignment with the recess  79  of the lever base  50 . Because of the roll  70 , a rotational entrainment of the pusher base  30  with the bolt end  33  occurs. Accordingly, the aforementioned inactive position  37  of the pusher arm  31  as shown in FIG. 8 a  is reached. Upon further return rotation  82 ′ of FIG. 9, the roll  70  is then forced from the second groove  66  via the slanted surfaces of the groove and is forced outwardly into the now aligned recess  79  by the now control-active circumferential surface  64 . The coupling between the pusher arm  31  and the LC lever  51  is again achieved. The coupling means  60  are again in the active position illustrated in FIG. 8 a.    
     
       
         
               
             
               
               
             
           
               
                   
               
               
                 List of Reference Numerals 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 10 
                 pusher 
               
               
                 11 
                 core part of 10 
               
               
                 12 
                 sleeve part of 10 
               
               
                 13 
                 bushing for 22, 24 of 12 
               
               
                 14 
                 key 
               
               
                 15 
                 first locking element, deflecting lever (rest position) 
               
               
                 15′ 
                 operational position of 15 
               
               
                 16 
                 working arm of 15 (rest position) 
               
               
                 16′ 
                 operational position of 16 
               
               
                 17 
                 flange member of 13 
               
               
                 18 
                 housing for 10 
               
               
                 19 
                 door panel 
               
               
                 20 
                 closing cylinder 
               
               
                 21 
                 cylinder core of 20 
               
               
                 22 
                 cylinder guide of 20 
               
               
                 23 
                 extension of 21, bolt 
               
               
                 24 
                 extension of 22, bolt guide 
               
               
                 25 
                 lock elements in 21 
               
               
                 26 
                 lock channel in 22 
               
               
                 27 
                 axial coupling between 21, 23 
               
               
                 28 
                 leverage profile between 22 and 24 
               
               
                 29 
                 freely moving spring for 24 
               
               
                 30 
                 pusher base 
               
               
                 31 
                 pusher arm of 30 (extended position) 
               
               
                 31′ 
                 inserted position of 31 
               
               
                 32 
                 head part of cylinder 
               
               
                 33 
                 bolt end of 23 (extended position) 
               
               
                 33′ 
                 inserted position of 33 
               
               
                 34 
                 key channel opening 
               
               
                 35 
                 cover of 13 
               
               
                 36 
                 first angular position of 31, active position 
               
               
                 37 
                 second angular position of 32, inactive position 
               
               
                 38 
                 pusher spring for 10 
               
               
                 39 
                 inner stop between 10 and 18 
               
               
                 40 
                 rotation between 41, 42 
               
               
                 40′ 
                 rotation between 42, 43 
               
               
                 41 
                 first rotational position of 11 or 33, secured position (FIGs. 
               
               
                   
                 7a, 7b) 
               
               
                 42 
                 second rotational position of 11 or 33, normal position (FIGs. 
               
               
                   
                 8a, 9b) 
               
               
                 43 
                 third rotational position of 11 or 33, special position (FIG. 
               
               
                   
                 9) 
               
               
                 44 
                 rod on 15 (FIG. 1) 
               
               
                 45 
                 actuation arrow of the locking element (FIG. 1) 
               
               
                 46 
                 return spring for 15 (FIG. 3) 
               
               
                 47 
                 rotary bearing of 15 
               
               
                 48 
                 one end face of 30 for 81 
               
               
                 49 
                 other end face of 30 for 81 
               
               
                 50 
                 lever base of 51 
               
               
                 51 
                 CL lever of 50 
               
               
                 52 
                 push member of 54 for 51 
               
               
                 53 
                 joint bracket between 51, 52 (FIG. 1) 
               
               
                 54 
                 CL drive (FIG. 3) 
               
               
                 55 
                 pivot angle between 36, 37 or 56, 57 
               
               
                 56 
                 first pivot position of 51, unsecured position 
               
               
                 57 
                 second pivot position of 51, secured position 
               
               
                 58 
                 radial counter shoulder for 61, first end of 69 
               
               
                 59 
                 counter stop surface for 62, second end of 69 
               
               
                 60 
                 coupling means between 30, 50 
               
               
                 61 
                 first flank, radial shoulder of 63 
               
               
                 62 
                 second flank, radial stop surface of 63 
               
               
                 63 
                 radial cam on 33 
               
               
                 64 
                 control surface on 33, circumferential surface 
               
               
                 65 
                 control surface on 33, first groove 
               
               
                 66 
                 control surface on 33, second groove 
               
               
                 67 
                 annular recess in 30 for 72 
               
               
                 68 
                 arrow of movement of 51 from 57 into 56 
               
               
                 68′ 
                 arrow of movement of 51 from 56 into 57 
               
               
                 69 
                 annular recess in 30 
               
               
                 70 
                 coupling member of 60, roll 
               
               
                 71 
                 radial guide in 30 for 70 
               
               
                 72 
                 ring segment of 50 
               
               
                 73 
                 counter control surface on 72 for 70 (FIG. 7b) 
               
               
                 74 
                 catch element on 30, spring catch tooth (FIG. 7a) 
               
               
                 74′ 
                 catch element on 50, spring catch tooth (FIG. 6) 
               
               
                 75 
                 catch element on 30, first catch notch for 74 on 77 (FIG. 7a) 
               
               
                 75′ 
                 catch element on 30, first catch notch for 74′ (FIG. 6) 
               
               
                 76 
                 catch element on 30, second catch notch on 77 for 74 
               
               
                 76′ 
                 catch element on 50, second catch notch for 74′ on 77 (FIG. 6) 
               
               
                 77 
                 axial sleeve extension on 24 for 75 to 76′ 
               
               
                 78 
                 cutout in 30 (FIG. 7a) 
               
               
                 78′ 
                 cutout in 50 (6) 
               
               
                 79 
                 radial recess in 72 (FIG. 6) 
               
               
                 80 
                 actuation arrow of 10 (FIG. 1) 
               
               
                 81 
                 axial projection on 50 (FIG. 6) 
               
               
                 82 
                 rotational actuation arrow of 33 between 42 and 43 (FIG. 9) 
               
               
                 82′ 
                 counter rotation arrow of 33 between 43 and 42 (FIG. 9) 
               
               
                 83 
                 arrow for adjusting movement of 31 (FIG. 8a) 
               
               
                 83′ 
                 arrow for adjusting movement of 31 (FIG. 8b)