Patent Publication Number: US-2007113603-A1

Title: Lock with a locking cylinder

Description:
The invention relates to a lock with a locking cylinder, with a latch, with a locking means which can be moved into a locking position and an unlocking position, with two opposing split hubs for triggering the latch and the locking means, with a locking cylinder pull which can move lengthwise and which is guided to a receiver for the locking cylinder, depending on the position of the locking cylinder pull the locking means being blocked or released, with energy transmission means located between the split hubs and the locking means.  
      This lock is known for example from EP 0 913 550 B1 and has two actuating planes in which there is one of the split hubs at a time. The locking means is made as a driving rod and can be selectively driven by one split hub or the other split hub. To establish the main operating side of the lock one of the split hubs can be connected to the latch driver-cam disk which is supported between the split hub. The disadvantage in this lock is however that it cannot be recognized from the outside whether the lock is in the locking position or in the unlocking position.  
      The object of the invention is to develop a lock of the initially mentioned type such that it displays on one side a simple indication of the blocking or release of the locking means.  
      This object is achieved as claimed in the invention in that the locking cylinder on the main operating side has a knob and on the secondary operating side has a lock channel for insertion of a key, that the knob is permanently coupled to the beard of the locking cylinder and has a mark for indication of the locking position and the unlocking position, that the locking cylinder pull is coupled in both directions of motion to the locking cylinder and that at least one of the split hubs is coupled to means for moving the locking cylinder pull for moving the knob of the locking cylinder when the locking means is moved into the unlocking position.  
      The locking cylinder pull is driven by this configuration when the locking means is driven via the respective split hub into the unlocked position. In doing so the knob is likewise moved at the same time and indicates by its position the blocking or release of the locking means. In the door-mounted state of the lock as claimed in the invention, the knob is located on the inside of the door, the so-called main operating side. On the outside of the door, the so-called secondary operating side, only the locking channel is visible. Since the side of the locking cylinder which has the locking channel is coupled only to the beard when a key is inserted into the locking channel, the blocking or release of the locking means cannot be recognized from the secondary operating side. Preferably the mark is made as a nonround shape, for example by an oblong configuration of the knob.  
      The construction effort for selective blocking or release of the motion of the locking means depending on the position of the locking cylinder pull can be kept especially small according to one advantageous development of the invention when a ratchet lever which engages the locking means is connected via a rocker to the locking cylinder pull.  
      Catching of the ratchet lever between its end position can be easily achieved according to another advantageous development of the invention when one end of the rocker is pretensioned via a spring element with the locking cylinder pull in one direction and with its side of this end of the rocker facing away from the spring element is opposite a control pin located on the locking cylinder pull.  
      Often it is desirable for the blocking of the locking means to be releasable selectively via the locking cylinder or additionally from the main operating side via the respective split hub. From the secondary operating side the blocking of the locking means will be cancelled solely via the locking cylinder. The locking cylinder pull can be driven according to another advantageous development of the invention by means of one of the split hubs when a projection is connected to the locking cylinder pull and when the projection protrudes into the region of movement of a shoulder of one of the split hubs when the split hub is being driven into the position which unlocks the locking means. Thus the projection is made as a part of the means for moving the locking cylinder pull. By this configuration the blocking of the locking means can be cancelled by the driving of the respective split hub and then the locking position can move into the unlocking position via the respective split hub. The split hub which interacts with the projection establishes the main operation side of the lock.  
      The main operating side and the secondary operating side of the lock as claimed in the invention can be easily selected when the two split hubs each have a shoulder and when the projection can be moved selectively into the region of movement of the shoulder of one split hub or into the region of movement of the shoulder of the other split hub. By moving the projection the interaction of the respective split hub with the locking cylinder pull and thus the main operating side of the lock is established. Thus the lock which has been locked via the locking cylinder can be unlocked via the split hub which is located on the main operating side. In addition, in the choice of the main operating side the knob of the locking cylinder can be located on the side of the split hub which interacts with the projection.  
      The movement of the projection is made especially simple according to another advantageous development of the invention when the projection is part of a stud bolt.  
      For various applications of locks it is desirable for the blocking of the locking means to take place solely via the locking cylinder. It could be considered that to do this the projection opposite the shoulder of the split hub simply be dismounted by removing for example the stud bolt which has the projection. The lock as claimed in the invention can however be adapted especially easily to different applications when the projection is located on the plate which is pivotally mounted on the locking cylinder pull, when the plate is pretensioned against a positioning means and when the positioning means can be moved into two positions, the positioning means in one position deflecting the plate such that the projection protrudes into the region of motion of the shoulder, and in the other position the projection being located outside of the region of motion of the shoulder. Thus, it is established via the position of the positioning means whether blocking of the locking means can be canceled from the main operating side solely by means of the locking cylinder or additionally by means of the split hub.  
      The movement of the positioning means is made especially easy according to another advantageous development of the invention when the positioning means is made as a slide.  
      The coupling of the locking cylinder in two directions of motion with the locking cylinder pull is made especially simple in terms of construction according to another advantageous development of the invention when the receiver of the locking cylinder has a sprocket.  
      According to one advantageous development of the invention the intended path of motion of the locking cylinder pull when the receiver of the locking cylinder is partially turned can be easily produced when there is gearing between the receiver of the locking cylinder and the locking cylinder pull.  
      To further reduce the structural complexity of the lock as claimed in the invention, it is helpful if the slide of the locking means is coupled to a bolt and/or a driving rod, and has a driver for moving the locking cylinder pull. The driver is used in addition to the projection on the locking cylinder pull and the shoulder which interacts with the projection on the split hub for complete motion of the locking cylinder pull and thus of the knob of the locking cylinder into the position which indicates the release of the locking means.  
      In the mounted state of the lock as claimed in the invention, movement of the locking means into the locking position can be easily avoided when the feeler of a misoperation safeguard is pretensioned out of the lock case and in its position projecting out of the lock case positively engages the slide of the locking means. In this way the misoperation safeguard prevents bolts and the like from being unintentionally drawn out when a wing of the door which has the lock as claimed in the invention is not in the frame. 
    
    
      The invention allows numerous embodiments. To further illustrate its basic principle one is shown in the drawings and is described below.  
       FIG. 1  shows the lock as claimed in the invention in the unlocked position,  
       FIG. 2   a  shows the lock as claimed in the invention from  FIG. 1  in a side view,  
       FIG. 2   b  shows highly enlarged a partial region of the lock as claimed in the invention from  FIG. 1  in a perspective,  
       FIG. 3  shows the lock as claimed in the invention from  FIG. 1  in the locked position in the operating position in which the lock can be unlocked solely by way of the locking cylinder,  
       FIG. 4  shows the lock as claimed in the invention from  FIG. 1  in the locked position in another operating position in which the lock can be unlocked via the split hub.  
       FIG. 5  shows the lock as claimed in the invention from  FIG. 4  in a view from the side. 
    
    
       FIG. 1  shows a lock in the unlocked position with a lock case  1  and with a receiver  2  for the locking cylinder  3  shown in  FIG. 2   a . Furthermore the lock has two split hubs  4 ,  5  located on top of one another for triggering a locking means  6 . The two split hubs  4 , 5  and the components corresponding to them are shown highly enlarged in  FIG. 2   b  for clarity. The lock case  1  is shown open to illustrate the lock components. The lock has a bolt  7  and a latch  8  which can be pretensioned out of the lock case by way of a spring element which is not shown. The locking means  6  has energy transmission means  9  connected to the split hubs  4 ,  5 . The energy transmission means  9  act on the pin  11  mounted in the slide  10 . The slide  10  engages a driving rod  12  and the bolt  7 .  
      The receiver  2  for the locking cylinder  3  is connected by way of gearing  13  to the locking cylinder pull  14 . The locking cylinder pull  14  is connected via a spring element  15  and to a rocker  16  and via the rocker  16  to the pivotally mounted ratchet lever  17 . Furthermore the locking cylinder pull  14  has a control pin  18  which is opposite one end of the rocker  16 . A driver  29  located on the slide  10  strikes the free end of the locking cylinder pull  14 . A pivotally mounted spring element  33  is used as a catch of the end positions of the locking cylinder pull  14 . A plate  20  with a projection  21  is mounted on the locking cylinder pull  14  to be able to pivot around the control pin  18 . The plate  20  is located in the plane between the shoulders  22 ,  23  of the split hubs  4 ,  5 . The projection  21  is made as a stud bolt which is screwed into the plate  20 . Thus the projection  21  can be placed selectively opposite the shoulder  22  of one split hub  4  or the shoulder  23  of the other split hub. The plate  20  is pretensioned against a positioning means  24 .  
      A misoperation safeguard  25  has a feeler  26  which is pretensioned out of the lock case  1  and which engages teeth  27  of the slide  10 . In the door-mounted state of the lock the misoperation safeguard  25  blocks motion of the slide  10  and thus the locking means  6  when the door is not closed.  
      In the unlocked position shown in  FIGS. 1, 2   a  and  2   b  the front of the split hub  4  is shown swivelled clockwise and via the latch return lever  28  presses the latch  8  back into the lock case  1 . Furthermore the energy transmission means  9  of the locking means  6  are pushed by way of the illustrated position of the split hub  4  which is the front one in the plane of the drawings such that the slide  10  is pushed via the pin  11  up in the plane of the drawings. Here the bolt  7  is likewise pressed back into the position retracted in the lock case  1 . The driver  29  of the slide  10  moreover presses the locking cylinder pull  14  up in the plane of the drawings so that the receiver  2  for the locking cylinder  3  is likewise turned. In doing so a knob  30  of the locking cylinder  3  is moved into the unlocked position. The lock can thus be recognized as unlocked from the outside by looking at the knob  30  of the locking cylinder  3 . The knob  30  is mounted on the so-called main operating side of the lock, while on the opposite, secondary operating side the locking cylinder  3  can be actuated only by way of an inserted key  31 .  
      If proceeding from the position shown in  FIG. 1  the split hub  4  shown deflected is released, the latch  8  is forced out of the lock case  1  by the force of the spring element and in doing so the split hub  4  is swivelled back by means of the elastically mounted energy transmission means  9 . Then, by selectively turning one of the split hubs  4 ,  5  counterclockwise the locking means  6  can be driven and the lock moved into the locked position. By selectively turning one of the split hubs  4 ,  5  the energy transmission means  9  of the locking means  6  are driven and the pin  11  mounted on the slide  10  is pushed. The main driving gear  32  located between the slide  10  and the bolt  7  moves the bolt  7  out of the lock case  1  and can be pulled back again into the lock case  1  by subsequent driving of the split hubs  4 ,  5  together with the latch  8 . But if the locking cylinder  3  is actuated in the position in which the bolt  7  projects out of the lock case  1 , the locking cylinder pull  14  moves down, viewed in the plane of the drawing, as shown in  FIG. 3 . By moving the locking cylinder pull  14  the rocker  16  is deflected by the control pin  18  and the ratchet lever  17  engages the region of motion of the pin  11  attached to the slide  10 . Thus the locking means  6  is blocked and the lock locked and cannot be unlocked by driving the split hubs  4 ,  5 . Since the knob  30  shown in  FIG. 2  has been turned when the locking cylinder  3  moves into the locked position, it can be recognized using the position of the knob  30  from outside the lock that the lock is locked.  
      If the lock is to be unlocked proceeding from the position shown in  FIG. 3 , first the locking cylinder  3  must be actuated either via the key  31  or via the knob  30 . In this position the lock can only be unlocked via actuation of the locking cylinder  3 . With this actuation the locking cylinder pull  3  is moved up in the plane of the drawing and thus the control pin  18  is moved away from the end of the rocker  16 . At the same time, the spring element  15  which connects the rocker  16  to the locking cylinder pull  14  is relieved and in doing so the rocker  16  is deflected. This leads to movement of the ratchet lever  17  out of the region of motion of the pin  11  located on the slide  10  and thus to cancellation of blocking of the locking means  6 .  
       FIG. 4  shows the lock from  FIG. 1  in the locked position. In contrast to the position shown in  FIG. 3 , the plate  20  in  FIG. 4  is deflected via the positioning means  24  so that the projection  21  moves into the region of motion of one of the shoulders  22 ,  23  of the split hubs  4 , 5 . If the split hub  4  which interacts with the projection  21  is turned slightly clockwise, the shoulder  22  presses the projection  21  and thus the locking cylinder pull  14  up, viewed in the plane of the drawing. In this way the blocking lever  17  is moved out of the region of motion of the pin  11  mounted on the slide  10  and the lock can be unlocked via the split hub  4  in the position shown in  FIG. 1 . The positioning means  24  is made as a slide and enables, depending on the two operating positions shown in  FIGS. 3 and 4 , whether the lock, as shown in  FIG. 3 , can be unlocked solely by way of the locking cylinder  3  or as shown in  FIG. 4  additionally by way of the split hub  4 ,  5  which interacts with the projection  21  [sic]. The location of the projection  21  on the plate  20  establishes via which of the two split hubs  4 ,  5  the lock can be unlocked in the operating position of the positioning means  24  shown in  FIG. 4 . This identifies the main operating side of the lock on which the knob  30  of the locking cylinder  3  is located. The other side of the lock is often called the secondary operating side. From this side the lock can be unlocked solely via the actuation of the locking cylinder  3  by means of the key  31  shown in  FIG. 2 . The latch  8  and the misoperation safeguard  25  can be mounted in two positions so that the lock can be refitted for doors closing to the left and right.  
       FIG. 5  shows the lock from  FIG. 4  in the locked position from the side. Compared to the unlocked position shown in  FIG. 2 , it can be clearly recognized that the knob  30  is made elongated and identifies the unlocked or locked position of the lock.