Abstract:
The invention relates to a lock that can be used with a flap, comprising a rotary unit that is made up of a rotary spagnolet that interacts with a closing element ( 10 ) and a rotating latch ( 22 ). In order to improve operational performance, the rotary unit is provided with a rigid catch ( 23 ) that preferably has two counter shoulders running in opposite directions. The output member ( 35 ) of a motor ( 40 )—driven gear mechanism is also provided with two corresponding counter shoulders. This enables the motor to provide assistance with closing and, optionally, opening, whereby the rotary unit can be guided in a closing, tilting direction or an opening, tilting direction until the flap is fully closed or opened. The motor ( 40 ) comprises a gear mechanism with a group of gears that can be displaced between an engaged position and a separated position. The detent pawl ( 16 ) which interacts with the rotating latch ( 22 ) is disabled in the separated position, should an emergency arise. When the flap is in a closed or open position, a free area exists between the shoulders and counter shoulders, enabling the flap to be moved manually.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a motorized lock for flaps or doors of motor vehicles, especially a lock for a glove compartment. 
     2. Description of the Related Art 
     The motorized lock of the aforementioned kind has a rotary spagnolet in which, during closing of the flap, a locking member is inserted and rotates the rotary spagnolet out of an open pivot position, characterizing the open position of the flaps via a split position of the flap into a closed position determining the locked position of the flap, with a locking pawl having a rotating latch connected rotationally fixedly to the rotary spagnolet when the locking pawl is active and when the rotary unit, comprised of the rotary spagnolet and the rotating latch, has been transferred out of its open pivot position, with the flap in the open position, either into a pre-locking position determining the split position of the flap or into a closed pivot position defining the locked position of the flap. 
     SUMMARY OF THE INVENTION 
     Even though for locks of different kinds motor-driven closing and opening aids are known, these are not suitable for a lock of the kind mentioned in the preamble. According to the invention, a motor is used as a closing and, if needed, also an opening aid wherein a special gear mechanism acts via shoulders onto correlated counter shoulders of a catch. The catch is a component of a rotary unit which, in addition to the catch, also comprises a rotating latch cooperating with a locking pawl and a closing member cooperating with a rotary spagnolet. The gear mechanism has a position-changeable gear group which, relative to the rest of the gear mechanism, is adjustable between an engagement position and a separating position. In the closed or open position of the flap the rotary unit is in a final locking position or an initial position but the drive member of the gear mechanism having the shoulders is always transferred into a defined ready position. In it a free space is provided between the shoulders and the counter shoulders so that the flap can be easily opened or closed manually. In this connection, the gear mechanism is in a separating position so that a possible self locking action in the drive chain between the motor and the drive member is canceled. The flap can be manually moved farther in any intermediate position in which an emergency situation occurs. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further features and advantages of the invention result from the claims, the following description, and the drawings. In the drawings, an exemplary embodiment of the invention is illustrated. It is shown in: 
     FIG. 1 a schematic view of the lock according to the invention; 
     FIG. 2 in a side view essential components of the lock in a first position; 
     FIG. 2 a  a cross-section of a part of the lock of FIG. 2 along the indicated section line IIa—IIa; 
     FIG. 2 b  an axial section along the section line IIb—IIb, indicated in FIG. 4, of a part of the lock with broken-away portions; 
     FIG. 3 the side view according to FIG. 2 with the lock parts in a second position; 
     FIG. 4 a  the axial plan view onto the lock and the viewing direction of arrow VIa of FIG. 2 with the lock parts in a ready position for closing a flap; 
     FIG. 4 b  a plan view corresponding to that of FIG. 4 a,  wherein the two uppermost components of a rotary unit belonging to the lock, i.e., a rotary spagnolet and a rotating latch, cannot be seen but are illustrated by a dash-dotted line, which view corresponds to a section taken along the section line VIb—VIb of FIG. 2; 
     FIGS. 5 through 8 a,  in a representation corresponding to FIG. 4 b,  three further positions of the lock parts which result during closing of the flap provided with a closing member of this lock, wherein FIG. 8 a  shows the ready position of the lock parts for opening when the flap is closed; 
     FIG. 8 b  shows the same rotational position of the lock parts as FIG. 8 a  but in an emergency situation for a manual opening of the flap or for illustrating an alternative function of this lock; 
     FIGS. 9 through 12 the lock parts in four further rotary positions which result for a motor-driven opening of the flap; and 
     FIG. 13 the same illustration of the lock parts as in FIG. 11 but in an alternative application where, instead of the motor, return springs can return the lock parts again into their ready position for closing the flap according to FIG. 4 b.   
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     The lock illustrated in the Figures is used preferably for a flap which belongs to a glove compartment. Accordingly, in FIG. 1 the movable flap  11  and the stationary compartment rim  12  are illustrated schematically. In the present case the movable flap  11  supports the frame with a closing member  10 , here in the form of a bolt with a round cross-section while the compartment rim  12  has a lock housing  19  from which the rotary latch  22  projects which cooperates with the closing member  10 . It is understood that the lock parts  10 ,  19  can also be arranged mirror-symmetrically relative to the movable and stationary elements  11 ,  12  of the glove comfort and. 
     The most important lock parts provided in the lock housing  19  are illustrated in FIGS. 2 to  4   b.  In the lock housing  19  an axle shaft  13  is rotatably supported which forms a component unit  20  of several components  21  to  23  which are fixedly connected to one another. The component  20  is thus a part which is rotatable in its entirety and is therefore in the following referred to as a rotary unit. This rotary unit  20  includes first the fork-shaped rotary spagnolet or latch member  21  whose fork opening during closing of the flap, according to the movement arrow  15  illustrated in FIG. 4 a,  is engaged by the closing member  10 . At an axial spacing thereto in the interior of the lock housing  19  a rotating latch  22  is provided which has a pre-locking stage  24  and a final locking stage  25  for a pivotable locking pawl  16 . The locking pawl  16  is spring-loaded in the direction of arrow  17  in the direction toward the rotating latch  22 . Moreover, the entire rotary unit  20  is spring-loaded in the direction of opening of the rotary spagnolet  21  as illustrated in FIG. 4 a  via the force arrow  27 . The fully open position of the rotary spagnolet  21  illustrated in FIG. 4 a  is limited by a schematically indicated stop  26  in the housing against which the spring load  27  normally forces the rotary spagnolet  21 . This open pivot position is present in the open position of the flap. 
     In the lock housing  19  a gear mechanism  30  acted on by an electric motor  40  is positioned. The gear mechanism  30  comprises several gear groups of which one special gear group  36  can be position-changed, in particular, in the present case by tilting as can be seen when comparing FIGS. 2 and 3. The input member of the gear mechanism  30  is a worm driven by the motor  40  and engages a worm wheel  31 . The worm wheel  31  is connected fixedly with spur gears  32  and is freely rotatable on the axle shaft  13 . The spur gear  32  meshes with a gear  33  which is seated fixedly on the pinion  34 . The component group  36  of the gear mechanism parts  33 ,  34  has a shaft  14  which in a first type of application of the lock, extends normally parallel to the axle shaft  13 . In this case, the pinion  34  meshes with the drive member  35  of the gear mechanism  30  which is also formed as a spur gear. Accordingly, the gear group  36  is in an active engagement position where the rotation exerted by the motor  40  is transmitted onto the drive member  35 . 
     As illustrated in FIG. 3, the component group  36  can be moved into a tilted position  36 ′ by an actuator  50  comprising several members which tilted position is pivoted by an angle  18  according to FIG.  3  and in which the pinion  34  engages no longer the toothing of drive member  35 . The self locking action of the gear mechanism  30  is canceled. The tilted position  36 ′ of this gear group can be referred to as “separating position”. 
     The drive member  35  is hollow as can be seen best in FIG. 2 b  and serves for receiving the catch  23  of the rotary unit  20 . The drive member  35  is provided with an axial cam  37  whose axial end face is enhanced for illustration purposes in FIGS. 4 a  through  13  by dotted shading. This cam  37  defines a radial control surface  47 . Moreover, the drive wheel  35  has two shoulders  38 ,  39  which can be seen in FIG. 4 b  and which have correlated therewith two counter shoulders  28 ,  29  on the rotating latch  22 . The two shoulders  38 ,  39  of the drive member  35  as well as the two counter shoulders  28 ,  29  are opposite relative to one another, respectively, as can be seen in FIG. 4 b.  It is important in this connection that between the shoulder and the counter shoulder  28 ,  38  an angle-shaped free space  48  is provided. A corresponding free space  49  is also provided between the other pair  39 ,  29  of the two shoulders and counter shoulders. 
     In FIGS. 4 a,    4   b  the drive member  35  is in a ready position for closing the flap which is in its fully open position. In the ready position of FIG. 4 a,  the locking pawl  16  is supported as a result of the aforementioned spring loading  17  at the peripheral surface  42  of the rotating latch  22 . The flap is moved first manually in the direction of its closed position wherein the locking bolt  10  provided on it is moved in the direction of the already mentioned arrow  15  and thus impacts on the rotary spagnolet  21  and thus entrains it. First, a manual closing pivot movement of the rotary spagnolet  21  in the direction of arrow  15  of FIG. 4 a  takes place wherein the entire rotary unit  20 , i.e., including the catch  23 , is pivoted against the spring load  27 . The counter shoulder  28  thus moves away increasingly from the shoulder  38  belonging to the drive member  35 . The drive member  35  remains in the rest position until the position of the rotary unit  20  illustrated in FIG. 5 has been reached. 
     In FIG. 5, the rotary unit  20  is in a so-called pre-locking position where the pawl  16  has dropped, as a result of its spring load  17 , into the pre-locking stage  24  of the rotating latch  22  illustrated in a dash-dotted line. In this case, a “split position” of the flap is present. In FIG. 5, as a result of the manual movement  58  the counter shoulder  28  has moved away from the shoulder  38  to a maximum degree. This pre-locking position is detected by sensors which now supply current to the motor  40 . Via the gear mechanism  30  the drive member  35  is now rotated father in the direction of closing  58  of FIG.  5 . Now the shoulder  38  of the drive wheel  35  impacts on the counter shoulder  28  of the catch  23 . Accordingly, the entire rotary unit  20  is pivoted, as illustrated in FIG.  6 . In this connection, the pre-locking stage  24  of the rotating latch  22  moves away from the spring-loaded locking pawl  16 . Since the locking bolt  10  has been moved already sufficiently into the fork opening of the rotary spagnolet  21 , it is now entrained by the closing pivot movement  58  of the rotary spagnolet  21  so that the flap now is closed by motor drive action. 
     In FIG. 7 the motor-driven closing pivot movement  58  is completed via the drive member  35 . The rotary unit  20  with its rotary spagnolet  21  is now in a final locking position. The locking pawl  16  has dropped into the final locking stage  25  of the rotating latch  22 . This is now detected by sensors which slow down the motor. Moreover, in this type of application the rotary direction of the motor is reversed; a reverse rotation results by which, via the gear mechanism  30 , the drive wheel  35  is first rotated back in the opening pivot direction according to arrow  59  of FIG.  7 . This return rotation however does not include the rotary unit  20 . The rotary spagnolet  21  and the locking bolt  10  engaged by it remain in the completely closed pivot position and secure the locking bolt  10 . Accordingly, the completely closed position of the flap is secured. 
     The latter remains in place when the drive member  35  finishes its return rotation in the direction  59  of the opening pivot direction according to FIG. 8 a.  This can be detected and triggered by sensors. In this position, the shoulder  38  of the drive member  35  has moved away from the counter shoulder  28  of the catch  23 . A large free space defined by the angle  61  in FIG. 8 a  is present therebetween. Also, between the shoulders and counter shoulders  39 ,  29 , not yet active at this point, a free space defined by the angle  62  is provided. The same rotational position of the drive member  35  as in FIGS. 4 a,    4   b  is presented as illustrated with the aid of the position of the cam  37  shown in dotted shading. The position of the rotary unit  20  however is opposite; while in FIGS. 4 a,    4   b  the completely open initial position is present, the rotational unit  20  in FIG. 8 a  is shown in its completely closed final locking position. In FIG. 8 a  the drive member  35  is again in its ready position, as in FIGS. 4 a,    4   b;  however, for opening the flap in the direction of the opening arrow  59  illustrated on the rotary spagnolet  21 . The manual opening of the flap, however, is initially not possible because the drive member  35  engages the other members of the gear mechanism  30 , and between these members a self locking action is present. Primarily, the movement in the opening pivot direction  59  is prevented because of the locking pawl  16  securing the rotary unit  20  by means of the rotating latch  22  in the final locking position illustrated in FIG. 8 a.  In this type of application of the invention, a motor-driven opening movement is therefore provided, as will be explained in more detail with FIG.  9 . 
     An emergency situation may now occur where, in the ready position of FIG. 8 or in any of the preceding or following intermediate positions of the drive member, the current supply fails and a motor-driven opening of the flap is impossible. The invention makes possible a manual opening movement by activating the special actuator  50 , already mentioned in connection with FIG. 3, and this will be explained in FIG. 8 b  in more detail. 
     The actuator comprises first a working lever  51 , illustrated in FIGS. 8 a  and  8   b,  which, as illustrated in dashed lines, supports the tiltable end of the axle  14  of the indicated gear group  36 . In the normal situation according to FIG. 8 a,  the working lever  51  is secured by a support lever  52  so that in connection with FIG. 2 the already described engagement position  36  of this component group is present. The actuator  50  is triggered by a manual grip, not shown, which acts on a pull cable  53 , illustrated with its end part in FIGS. 8 a,    8   b,  of the Bowden cable  54 . The pull cable  53  engages the support lever  52  which can be transferred from its active position  52  illustrated in FIG. 8 a  into its inactive position  52 ′ illustrated in FIG. 8 b.  The working lever in this connection is under the action of a lifting spring illustrated by the force arrow  57  which in the case of the working lever illustrated in FIG. 8 b  is pivoted into the pivoted-away position  51 ′. By doing so, the gear group reaches the tilted position, shown in FIG.  3  and illustrated by the end of the axle  14 , which tilted position characterizes the separating position of the gear mechanism  30 . The gear mechanism  30  is decoupled so that the self locking action is canceled. The drive member  35  can therefore be moved without motor in the direction of the arrow  59  in the opening pivot direction as illustrated in FIG. 8 b.  This is automatically carried out in this situation by means of a return spring  44 , illustrated in FIGS. 2,  2   a,  which engages with its two spring legs  43  two pins  45 ,  46  and ensures their radial alignment according to FIG. 2 a.  One pin  45  is seated on the drive member  35 , while the other pin  46  is fastened to the housing, i.e., is positioned in the interior of the lock housing  19  indicated in FIGS. 2 a  and  2 . As indicated in FIG. 8 b,  the pivoting-away movement of the working lever into its pivoted-away position  51 ′ is realized by a coupling rod  55  in correlation with the support lever which then acts in its inactive position  52 ′. 
     A slotted hole guiding action or the like then provides for an adjustment of the pivot movement path resulting therefrom. There is a further coupling rod  56  between the locking pawl  16  and the working lever  51  so that here a suitable longitudinal guiding also provides for an adjustment of the movements. By means of the further coupling rod  56 , according to FIG. 8 b,  via the working lever having been moved into the pivoted-away position  51 ′, an adjusted pivoting-away movement of the locking pawl  16  is realized which, from its active engagement position in the rotating latch  22  according to FIG. 8 a,  is pivoted into an inactive release position  16 ′ of FIG. 8 b  counter to its spring load  17 . Subsequently, the rotating latch  22  is no longer blocked in its final locking stage  25 . The entire rotary unit  20  is free and can thus be moved in the direction of opening arrow  59 . This can be realized by the action of the afore described return spring  44 . Moreover, the rotary spagnolet  22  of the rotary unit  20  is subjected to the action of the spring force  27 , already mentioned in connection with FIG. 4 a,  which is active in the same direction  59 . Accordingly, the rotary spagnolet  21  can again be fully open until it reaches the ready position illustrated in FIG. 4 a.  This opening movement  59  releases the locking bolt  10 , and the flap is now in its fully open position. 
     The aforementioned cancellation of the self locking action of the gear mechanism by the separating position  36  of the gear group is important primarily when the emergency situation which caused the triggering of the actuator  50  has happened in the afore described intermediate positions according to FIGS. 6 or  7 . The automatic return of the rotary unit  20  resulting from the spring force is not possible in the direction of opening direction  59  because upon its return rotation the catch  23  impacts with a counter shoulder  28  against the shoulder  38  belonging to the drive member  35 . This is not the case in the situation of FIG. 8 a  which, as mentioned above, is identical to FIG. 8 b.  As has been mentioned above, the drive member  35  with its shoulders  38 ,  39  is already in a position which coincides with the open position of FIGS. 4 a,    4   b.  The aforementioned free space  61  is large enough in order to return the rotary unit  20  into its initial position of FIG. 4 a.  Normally, this is carried out in this embodiment of the invention by a motor drive with the above-mentioned return rotation of the drive member  35  in the opening pivot direction  59  without the previously described triggering of the actuator  50  having to take place. 
     For a corresponding switching on of the motor  40 , for example, an electrical key is provided. When moving the drive wheel  35  in the direction of arrow  59  according to FIG. 9, the shoulder  39  of the cam  37  has moved onto the counter shoulder of the catch  23 . At the same time, the cam  37  with its control surface  47 , as illustrated in FIG. 9, has been moved against the locking pawl and has pivoted it into the aforementioned inactive position  16 ′ against the spring load. This pivoting action is without any feedback action on the aforementioned actuator  50  because the slotted hole guide is provided in the mentioned coupling rod  56 . This slotted hole guide makes the adjusting movement at the locking pawl by the control surface  47  possible, without action on the actuator  50 . The rotary unit  20  is no longer blocked by the locking pawl. 
     According to FIG. 10, the rotary unit  20  is further moved by the shoulder  39  of the drive motor  35 . by means of the counter shoulder  29  of the catch  23 . In this connection, the control surface  47  provided on the cam  37  maintains the locking pawl still in its inactive position  16 ′ so that an undesirable dropping into the subsequent pre-locking stage  24  of the rotating latch  22  is prevented upon further rotation  59  initiated by the motor. 
     Finally, the rotary unit  20  reaches the initial position shown in FIG. 11 by a motor-driven rotation  59  of the drive member  35 . The rotary spagnolet  21  is again moved into its fully open position and releases the locking bolt, as illustrated in FIG. 11 by dash-dotted lines. As illustrated by the movement arrow  60  the locking bolt  10  seated on the flap is moved away so that the flap can again reach its fully open position. On the path into the open pivoted position of FIG. 11 the pre-locking stage  24  of the rotating latch  22  is passed which is however inactive because the locking pawl is still secured by the control surface  47  at the gear mechanism side. Passing across the pre-locking stage  24  is again detected by sensors which in this embodiment of the invention slow the motor  40  and drive it again in the counter direction, i.e., in the closing direction  58 . The thus resulting conditions are illustrated in FIG. 12 in an intermediate rotational position of the drive member  35 . While the rotary unit  20  is secured by contacting of its rotary spagnolet  21  on the stop  26  as a result of spring action  27 , the shoulder  39  of the drive member  35 , which was still active previously, is moved away from the counter shoulder  29  of the catch  23 . When the drive wheel  35  is driven further in the opening direction  59  by a motor, the still active control surface  47  of FIG. 12 now passes underneath the locking pawl which is still maintained in its inactive position  16 ′. Finally, the ready position of the drive member  35 , as illustrated in FIGS. 4 a,    4   b,  is reached where the control surface  47  has moved away from the locking pawl  16  and is thus supported on the circumferential surface  42  of the rotating latch  22 . The rotating latch is activated and is under pre-stress of the spring load  17 . However, in this ready position it cannot yet drop into the locking stages  24  or  25  as long as the pivot position of the rotary unit  20  is present. 
     FIG. 13 shows first an emergency actuation which is analog to the conditions described in connection with FIG. 8 b.  While the drive wheel is still in the rotary position illustrated in FIG. 11, it is assumed that the electric power supply or the like fails and an opening or closing  58 ,  59  without motor driving action is to be performed. The opening is not required in the situation of FIG. 11, but the emergency situation could also result in a preceding rotational position, for example, FIG.  10 . In this case, the locking pawl is in its inactive position  16 ′ as a result of the control surface  47 , but the already aforementioned self locking action in the gear mechanism  30  would be present, had not the gear group been transferred into the separating position  36 ′ by triggering the actuator  15  in FIG.  13 . Since this however can be triggered according to FIG. 13, the pressure contact between the shoulder  39  and the counter shoulder  29  is canceled and the return effect of the above described return spring  54  can become effective. The drive member  35  is transferred by this spring  44  automatically into its ready position according to FIGS. 4 a,    4   b.  Accordingly, the rotary unit  20  reaches again its open pivot position, if it is not already present, as is the case in FIG.  13 . 
     The triggering of the actuator  50  according to FIG. 13 is also useful when, based on the FIGS. 4 a,    4   b,  an exclusively manual closing movement  58  is to take place. The rotary unit  20  can be pivoted ( 58 ) into the closed position manually by the angular amount  63  indicated in FIG. 4 b,  even though the shoulder  38  at the gear mechanism side impacts on the shoulder  28  of the catch. The free space  48  described in connection with FIG. 4 b  is indeed smaller than the angular amount  63  for the rotational movement of the construction unit  20  out of the open pivot position of FIG. 4 b  into the closed pivot position illustrated by a dotted line and corresponding to FIG.  7 . Also, a different operation of the invention is possible. This may reside in that the aforementioned gear group  36  is positioned normally always in the separating position  36 ′ described in connection with FIGS. 3,  8   b  and  13 . This initially does not impair the two ready positions for opening according to FIG. 8 a  and for closing according to FIGS. 4 a,    4   b,  as has been explained before. Only when, based on the ready position for closing according to FIGS. 4 a,    4   b,  a closing assistance by the motor  40  is desired, this gear group will reach its engagement position  36  so that the operation according to FIGS. 5,  6 ,  7  is carried out in the already described manner. However, a simplified control then occurs. Once FIG. 7 has been reached, the motor  40  thus stops the closing movement  58  of the drive member  35 . Now the gear group  36  is transferred by a suitable control member again into its separating position  36 ′ according to FIG. 3,  8   b,  or  13  where the self locking action in the gear mechanism  30  is canceled. The explained spring forces  27  or the return spring  44  then guides the drive member  35  automatically again into the ready position of FIGS. 8 a,    8   b  without a current supply of the motor  40  in the opening pivot direction  59  being required. The ready position according to FIG. 8 a  of the drive member  35  is realized by a spring force. Then the locking pawl  16  drops into the final locking position illustrated in FIG. 8 a  and secures the rotary unit  20 . 
     Now the position-changeable gear group  36  can again be transferred automatically into its separating position  36 ′ of FIG. 3, wherein however first the locking pawl remains in its engagement position  16  of FIG. 8 a.  In this connection, a variant relative to the conditions explained in FIG. 8 b  occurs. When now the rotary unit  20  is to be transferred again into the open position according to FIG. 11 of the preceding embodiment, a motor-driven opening movement in the direction of arrow  59  is not required. It is sufficient to transfer the locking pawl  16  by a suitable control member into its inactive position  16 ′ illustrated in FIG. 8 b  where the rotating latch  22  is released. The spring force  27  acting on the rotary unit  20  provides the spring-caused return movement of the rotary unit  20 . The described return spring  44  secures the drive member  35  in the ready position already illustrated in FIG. 8, which ready position is identical to FIG. 4 a  and again characterizes the desired ready state for closing. This alternative operation simplifies thus the control of the motor  40 . 
     
       
         
               
             
               
               
               
             
           
               
                   
               
               
                 List of Reference Numerals 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 10 
                 closing member, closing bolt 
               
               
                   
                 11 
                 movable flap 
               
               
                   
                 12 
                 stationary compartment rim 
               
               
                   
                 13 
                 axle shaft of 20 
               
               
                   
                 14 
                 tiltable axle of 36 
               
               
                   
                 15 
                 movement part of 10 locked position 
               
               
                   
                 16 
                 locking pawl (in engaged position) 
               
               
                   
                 16′ 
                 inactive position of 16, release position 
               
               
                   
                 17 
                 spring loading arrow of 16 
               
               
                   
                 18 
                 tilting angle between 36, 36′ (FIG. 3) 
               
               
                   
                 19 
                 lock housing 
               
               
                   
                 20 
                 rotary unit 
               
               
                   
                 21 
                 rotary spagnolet of 20 
               
               
                   
                 22 
                 rotating latch of 20 
               
               
                   
                 23 
                 catch of 20 
               
               
                   
                 24 
                 pre-locking stage of 16 
               
               
                   
                 25 
                 final locking stage of 16 
               
               
                   
                 26 
                 stop for 21 
               
               
                   
                 27 
                 spring loading arrow of 21 in the opening pivot direction 
               
               
                   
                 28 
                 first counter shoulder on 22 
               
               
                   
                 29 
                 second counter shoulder on 22 
               
               
                   
                 30 
                 gear mechanism 
               
               
                   
                 31 
                 worm gear of 30 
               
               
                   
                 32 
                 spur gear of 30 
               
               
                   
                 33 
                 gear of 36 
               
               
                   
                 34 
                 pinion of 36 
               
               
                   
                 35 
                 toothed drive member of 30 
               
               
                   
                 36 
                 position-changeable gear group of 33, 34 (engagement 
               
               
                   
                   
                 position) 
               
               
                   
                 36′ 
                 separating position of 36 
               
               
                   
                 37 
                 cam on 35 
               
               
                   
                 38 
                 first shoulder on 35 
               
               
                   
                 39 
                 second shoulder on 35 
               
               
                   
                 40 
                 motor 
               
               
                   
                 41 
                 worm gear on 40 
               
               
                   
                 42 
                 peripheral surface of 22 
               
               
                   
                 43 
                 spring leg of 44 
               
               
                   
                 44 
                 return spring 
               
               
                   
                 45 
                 pin on 35 (FIG. 2) 
               
               
                   
                 46 
                 pin on 19 (FIG. 2) 
               
               
                   
                 47 
                 radial control surface on 37 
               
               
                   
                 48 
                 free space between 28, 38 (FIG. 4a) 
               
               
                   
                 49 
                 free space between 29, 39 (FIG. 4b) 
               
               
                   
                 50 
                 actuator 
               
               
                   
                 51 
                 working lever (in the pivoted position) 
               
               
                   
                 51′ 
                 pivoted-away position of 51 
               
               
                   
                 52 
                 support lever (in active position) 
               
               
                   
                 52′ 
                 inactive position of 52 
               
               
                   
                 53 
                 pull cable of 54, core of 54 
               
               
                   
                 54 
                 Bowden cable 
               
               
                   
                 55 
                 coupling rod between 51, 52 (FIG. 8a) 
               
               
                   
                 56 
                 coupling rod between 16, 51 (FIG. 8a) 
               
               
                   
                 57 
                 force arrow of the lifting spring for 51 (FIG. 8a) 
               
               
                   
                 58 
                 movement arrow in the closing pivot direction of 20 or 35 
               
               
                   
                 59 
                 movement arrow in the opening direction of 20 or 35 
               
               
                   
                 60 
                 movement arrow of 10 in the open position (FIG. 11) 
               
               
                   
                 61 
                 free space between 28, 38 (FIG. 8a) 
               
               
                   
                 62 
                 free space, angle between 29, 39 (FIG. 8) 
               
               
                   
                 63 
                 angular amount for rotational movement of 20 (FIG. 4)