Abstract:
A latching device for a first system of plug connectors, which are fastened to a first mounting rail, and a second system of plug connectors, which are fastened to a second mounting rail, includes a passive latching part and an active latching part. When the active latching part is latched to the passive latching part, the first mounting rail and the second mounting rail are connected to each other, and the plug connectors located on the first mounting rail and the second mounting rail are brought into contact with each other.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a national stage of PCT/DE12/100011 filed Jan 19, 2012 and published in German, which has a priority of German no. 10 2011 001 069.3 filed Mar 3, 2011, hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a locking device for a first system of plug connectors with a second system of plug connectors, with each of the first system of plug connectors and the second system of plug connectors and the second system of plug connectors being connectable to a respective mounting rail. 
     These types of locking devices are necessary to prevent an inadvertent break in contact between systems of plug connectors in contact with each other. 
     2. Description of the Prior Art 
     DE 20 2008 006 934 U1 shows a plug connector for optical fibers. Each housing body has only one contacting element and can be strung together with others such that pins structured into one housing body fit into matching recesses of a neighboring housing body. The strung out plug connectors form a system of plug connectors. 
     KR1020060091923 A shows a system of plug connectors that are strung together on a mounting rail. The individual plug connectors are not connected to each other. The mounting rail is closed on both sides by a locking element. The locking element ensures that the plug connectors cannot be pushed off the mounting rail. 
     KR1020060091923 A does not show how the system of plug connectors can be connected to a system of mating plugs which are also located on a mounting rail. 
     SUMMARY OF THE INVENTION 
     The problem for the invention is to suggest a locking device for a system of plug connectors that enables a simple contacting of systems of plug connectors with each other. 
     The problem is solved by the characteristics of the system of plug connectors fixed on mounting rails as described herein. 
     Advantageous configurations of the invention are given in the sub-claims. 
     The system of plug connectors, as per the invention, consists of a row of plug connectors coupled with each other and which are together fixed onto a mounting rail. 
     The individual plug connectors are surrounded by a housing body. 
     Advantageously, the housing body is constructed in one piece. This can be achieved through known plastic injection molding techniques—in case of a plastic housing—or through known zinc pressure casting processes—in the case of a metallic housing. 
     It is also possible to construct the housing body out of a composite material, for instance out of a combination of metal and plastic. 
     A holding cage is snapped-in securely within the housing body. 
     The holding cage is essentially fashioned as a hollow cylinder. On one end, the holding cage has two arms pointing in the axial direction, which grasp securely around a contact element. At the other end, the holding cage grasps the cable sheath of a cable that is to be connected to the plug connector. One conductor of the cable is connected to the contact element by means of a crimp connector. 
     Coupling elements have been provided on both sides of the outside of the housing body which enable it to couple two or more plug connectors with similar housing bodies with one another. 
     Preferably, one coupling element is shaped like an arch-shaped groove and the other coupling element like a cylindrical pin. The cylindrical pin of one of the housing bodies is meant to be introduced into the arch-shaped groove of the similar housing body that is to be coupled. Thus, several plug connectors with similar housing bodies can be strung in a row. 
     When stringing in a row, only the housing bodies have to be similar. The internals of the plug connectors can be quite different. Thus, for instance, multi-poled electrical plug connectors can be combined with single-poled optical-fiber plug connectors. As a result, a high modularity of a plug connector arrangement can be achieved. A plug connector arrangement is also known as a system of plug connectors. 
     Additionally, fixing jigs have been provided on the outside of the housing bodies which enable the plug connectors to be fixed to a mounting rail, for example a top-hat rail. 
     The plug connectors can be coupled to each other by means of the coupling elements and additionally be fixed securely onto a mounting rail. 
     The fixing jigs consist of a combination of fixing lugs and spring pins. The fixing lugs are arranged axially and attach to a collar on the mounting rail. The fixing lugs are flexible and can deflect initially when snapping onto the mounting rail, before they snap-on behind another collar of the mounting rail. 
     The plug connector is completed by a cable gland that provides strain relief to the cable and serves to seal the housing body against media like dust and water. 
     If a desired number of plug connectors are in a row on a mounting rail, this is known as a system of plug connectors. 
     To connect two systems of plug connectors with one another, the mounting rails on which the systems are fixed must be joined together. This is implemented by means of a locking device which connects the individual mounting rails securely with one another, so that also the plug connectors opposite these can be connected with one another. 
     The locking device consists of a passive locking part and an active locking part. The active part has the locking elements with which the passive locking parts are attached to the active locking part. 
     When locking the active with the passive locking part, the mounting rails of the systems of plug connectors are brought together and joined with one another. Further, the individual plug connectors lying opposite each other are contacted with each other. 
     Advantageously, the locking elements of the passive locking part form a knee action lock. Thereby, a particularly stable lock is achieved. 
     To facilitate the joining of the two mounting rails, the locking device has a guide way. The guide way consists of a bolt on the active locking part which is guided into an opening intended for this purpose in the passive locking part. 
     The passive locking part has fixing jigs on both sides, with which a mounting rail can be fixed. Thus, two mounting rails can be arranged, statically stable, over one another—that is horizontally separated from each another. Due to the coupling of the passive with the active locking part with each another, connected systems of plug connectors can be arranged separated horizontally and in a statically stable manner. By means of the locking device, many systems of plug connectors can be arranged over one another to build what are known as plug-connector-arrays. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       An example of an execution of the invention is shown in the drawings and will be elaborated below. Shown is: 
         FIG. 1  a perspective presentation of a plug connector, 
         FIG. 2  another perspective presentation of the plug connector, 
         FIG. 3  a perspective presentation of the plug connector without base body, 
         FIG. 4  a perspective presentation of a contacting element, 
         FIG. 5  a side view of a plug connector mounted on a mounting rail, 
         FIG. 6  a perspective presentation of two plug connectors during a coupling process, 
         FIG. 7  a perspective view of two plug connector systems connected to each other and 
         FIG. 8  a side view of the locking device. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 
     The  FIGS. 1 and 2  show perspective representations of an example of an execution of the plug connector as per the invention. The invention is, however, not restricted to the example of execution shown here. 
     The plug connector  1  is surrounded by a base body  2 . Inside the hollow base body  2 , there is a holding cage  10 , snapped-in securely.  FIG. 3  shows the plug connector  1  without base body  2 . The holding cage  10  has snap-on elements  12  at one end, which mesh with matching undercuts (not shown) within the base body and thus fix the holding cage  10  in the base body  2 . The cable sheath of the connecting cable (not shown) also penetrates into the holding cage also at this end. 
     At the other end, the holding cage has arms  11 , which grip around the contacting element  20 . Due to this, the contacting element  20  is fixed along the axial symmetry axis in the base body  2 . 
     As already mentioned above, the opposite end of the holding cage  10  is penetrated by the cable sheath of the connecting cable. The conductor of the connecting cable is crimped onto the contacting element  20 . 
       FIG. 4  shows a perspective representation of the contacting element  20 . On one side, the contacting element  20  has a crimp opening  21  for taking up the conductor of the cable, that is to be connected. The other side of the contacting element  20  is fashioned in this example as a contact pin  22 . It can, however, also be a fashioned as a socket contact. 
     The invention is not restricted to single contact plug connectors. The contacting element  20  can also have several crimp openings  21  and contacts  22  for the purpose of connecting multi core cables. 
     The base body  22  surrounds a cylindrical pin  3  on one side and on the opposite side, an arch-shaped groove  4 . The pin  3  of a plug connector  1  is capable of being inserted in the groove  4  of another plug connector  1 . Thus, several plug connectors  1  can be strung out in a row or coupled with one another. When a desired number of plug connectors is arrived at, one refers to this as a system of plug connectors  1 ,  1 ′. 
     Fixing lugs  5  and spring pins  6  are additionally provided on the base body  2 , which together facilitate the reversible fixing of the plug connector  1  on a mounting rail  30 . The fixing lugs  5  grip in the undercuts  31  of the mounting rail  30 . While flipping down the plug connector  1  in the direction of the mounting rail  30 , the spring pins are first bent back by a beveled ring  33 , which then grip onto another undercut  32  of the mounting rail  30 . 
     The base body  2 , further surrounds supporting contours  7 , which prevent the force resulting from a movement of the plug connector  1  on the mounting rail  30  in the plugging direction, being fully imposed on the spring pins. 
     The plug connector  1  is equipped with a cable gland  40 , which is generally known state-of-the-art, and will not be discussed in detail here. The cable gland  40  is meant to act as a strain relief for the connecting cable and for sealing the base body  2  against media such as dust and water. 
       FIG. 6  shows the coupling procedure of two plug connectors on the mounting rail  30 . One plug connector  1   a  is already fixed on the mounting rail. The fixing lugs  5  of the plug connector  1   b  that is to be connected to it are first placed in the undercut  31 . The plug connector  1   b  can then be moved in the direction of the arrow  7 , towards the mounting rail  30 . The arch-shaped groove of the plug connector  1   b  grips behind the cylindrical pin  3  of plug connector  1   a . Because of the arched shape of the groove  4 , the plug connector  1   b  can be moved in the direction of the arrow  7 . Finally, as described above, the spring pins snap into the undercut  32  of the mounting rail  30 . The plug connectors  1  a and  1   b  are coupled with one another as well as fixed on the mounting rail  30 . 
     Exactly the reverse procedure is followed when uncoupling a plug connector from a modular system of plug connectors. The spring pins  6  must first be manually pressed out of the undercut  32 . The plug connector can subsequently be disengaged in the opposite direction to arrow  7  from the neighboring plug connector and the mounting rail  30 . 
       FIG. 8  shows the side view of a locking device  50 . The locking device  50  consists of a passive locking part  51  and an active locking part  52 . 
     The active  52  as well as the passive locking part  51  have lugs  56  that can be introduced into undercuts  31  of the mounting rail  30 . Both locking parts  51 ,  52 , can be fixed on to the relevant mounting rail  30 ,  30 ′ with the help of a connector  55 . The connector  55  grips simultaneously into a notch  57 ,  58  of the locking part  51 ,  52  and into rear groove  34  of the mounting rail  30 . 
     A guide way is provided for easy joining of locking parts  51 ,  52 . The passive locking part  51  surrounds an opening  54 , in which a bolt  53  of the active locking part  52  can be inserted. 
     The locking of both locking parts  51 ,  52  is achieved through a tensioning spring  59  attached to the locking part  52 , which is connected to a tensioning lever  60  (also attached to the active locking part  52 ). The tensioning spring  59  is placed over a tensioning lug  61  of the passive locking part  51 . By actuating the tensioning lug  60 , both the locking parts  51 ,  52  are reversibly joined to each other. The combination of tensioning lug  61 , tensioning spring  59  and tensioning lever  60  works on the principle of knee lever action and thereby simultaneously ensures a particularly stable coupling of locking parts  51 ,  52  and the plug connectors  1 ,  1 ′ in contact with each other. Furthermore, the knee lever action supports the unlocking procedure. 
       FIG. 7  shows several levels of systems of plug connectors  1 ,  1 ′. Two systems of plug contactors lying opposite each other are in contact with each other over the locking device  50 . Amounting rail  30 ,  30 ′ can be fixed on both sides of the locking device  50 . Thus, several systems of plug connectors  1 ,  1 ′ can be arranged equally spaced from each other. 
     The invention being thus described, it will be apparent that the same may be varied in many ways, Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be recognized by one skilled in the art are intended to he included within the scope of the following claims. 
     
       
         
               
             
               
               
               
               
             
           
               
                   
               
               
                 List of Reference Numbers 
               
               
                 System of Plug Connectors 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 1 
                 Plug connector 
                 10 
                 Holding cage 
               
               
                 2 
                 Base body 
                 11 
                 Arm 
               
               
                 3 
                 Cylindrical pin 
                 12 
                 Snap-in element 
               
               
                 4 
                 Arch-shaped groove 
                 13 
                   
               
               
                 5 
                 Fixing lugs 
                 14 
                   
               
               
                 6 
                 Spring pins 
                 20 
                 Contacting element 
               
               
                 7 
                 Supporting contour 
                 21 
                 Crimp opening 
               
               
                 30 
                 Mounting rail 
                 50 
                 Locking device 
               
               
                 31 
                 Undercut 
                 51 
                 Passive locking part 
               
               
                 32 
                 Undercut 
                 52 
                 Active locking part 
               
               
                 33 
                 Ring 
                 53 
                 Bolt 
               
               
                 34 
                 Groove 
                 54 
                 Opening 
               
               
                 40 
                 Cable gland 
                 55 
                 Connector 
               
               
                   
                   
                 56 
                 Lug 
               
               
                   
                   
                 57 
                 Notch 
               
               
                   
                   
                 58 
                 Notch 
               
               
                   
                   
                 59 
                 Tensioning spring 
               
               
                   
                   
                 60 
                 Tensioning lever 
               
               
                   
                   
                 61 
                 Tensioning lug 
               
               
                   
                   
                 62