Abstract:
A connector ( 1 ), in particular cable connector, for producing an optical and electrical connection to a mating connector ( 2 ). The connector ( 1 ) has a connector main housing ( 3 ) and at least one housing attachment part ( 4 ) and at least one optical waveguide carrier ( 5 ), and the housing attachment part ( 4 ) is fastened or fastenable releasably to the connector main housing ( 3 ) by a releasable and reconnectable connecting device ( 6 ). The optical waveguide carrier ( 5 ) and at least one electric contact ( 7 ) are arranged on the connector main housing ( 3 ), and the housing attachment part ( 4 ) has at least one electric extension contact ( 8 ) which is connectable to the electric contact ( 7 ) of the connector main housing ( 3 ) by connection of the housing attachment part ( 4 ) to the connector main housing ( 3 ).

Description:
INCORPORATION BY REFERENCE 
       [0001]    The following documents are incorporated herein by reference as if fully set forth: German Patent Application No. DE 10 2016 101 254.8, filed Jan. 25, 2016. 
       BACKGROUND 
       [0002]    The present invention relates to a connector, in particular cable connector, for producing an optical and electrical connection to a mating connector, wherein the connector has a connector main housing and at least one housing attachment part and at least one optical waveguide carrier, and the housing attachment part is fastened or fastenable releasably to the connector main housing by means of a releasable and reconnectable connecting device. 
         [0003]    Connectors of the above-mentioned type are used to connect cables, which have at least one optical waveguide for data transmission, to another cable or to a device, such as, for example, a television camera or film camera or the like. So that the data transmission over such optical connections functions beyond connector and mating connector, the open ends of the optical waveguides in the connector have to be able to be kept very clean and have to be able to be optionally cleaned. In the case of connectors of the type in question, it is known to release the housing attachment part from the connector main housing by the releasable and reconnectable connecting device in order to be able to separately clean the housing attachment part. 
       SUMMARY 
       [0004]    It is the object of the invention to improve connectors of the abovementioned type to the effect that there is no risk that, when the housing attachment part is removed, electric contacts of the connector can be accidentally touched. 
         [0005]    For this purpose, it is provided according to the invention in the case of connectors of the abovementioned type that the optical waveguide carrier and at least one electric contact are arranged on the connector main housing, and the housing attachment part has at least one electric extension contact which is connectable to the electric contact of the connector main housing by connection of the housing attachment part to the connector main housing. 
         [0006]    Through the arrangement of at least one extension contact in the housing attachment part, the electric contact of the connector main housing, which electric contact is possibly still under operating voltage when the housing attachment part is removed, can be arranged concealed or further to the rear, and therefore, even in the removed state of the housing attachment part, there is not the risk that electric contacts of the connector main housing that is still live stand free or are touched. Free-standing electric contacts constitute the risk for a person undertaking the cleaning of suffering an electric shock or other injury therefrom. 
         [0007]    In particularly preferred embodiments of the invention, the electric contact of the connector main housing is connectable to the electric extension contact of the housing attachment part by a plug-in connection. In other words, the electric contact and the electric extension contact can preferably be plugged directly or indirectly one in the other. This has the advantage of a simple and rapid connection since plug-in connections can be drawn together and also separated again very simply. 
         [0008]    Particularly preferably, however, in the case of connectors according to the invention it is especially provided that a contact surface of the optical waveguide carrier, in which contact surface at least one open end of at least one optical waveguide of the connector leads, is arranged offset with respect to the electric contact of the connector main housing, as seen in a connecting direction in which the electric contact of the connector main housing is connectable to the electric extension contact of the housing attachment part. By the offset between the open end or the open ends or the contact surface of the optical waveguide carrier, on the one hand, and the electric contacts of the connector main housing, on the other hand, the contact surface of the optical waveguide carrier and therefore the open ends of the optical waveguides can be cleaned without running the risk of touching the electric contacts that are arranged offset with respect thereto. It is particularly preferably provided in this connection that the contact surface of the optical waveguide carrier protrudes further from the rest of the connector main housing than the electric contact of the connector main housing. 
         [0009]    To the extent that components are referred to singularly in the claims and also in the above explanations, this is a purely linguistic simplification and does not exclude individual components of the connector according to the invention also being present in a number greater than one, in the sense of at least one or more than one. This applies in particular to the number of optical waveguides which are fastened to the optical waveguide carrier and lead at their open ends into the contact surface of the optical waveguide carrier. In the case of connectors according to the invention, a plurality of optical waveguides are generally fastened to the optical waveguide carrier and lead at their open ends into the abovementioned contact surface of the optical waveguide carrier. 
         [0010]    Furthermore, however, connectors according to the invention may of course also be equipped with more than one housing attachment part and with more than one optical waveguide carrier, etc. 
         [0011]    The open end of an optical waveguide is the end through which light can emerge from the optical waveguide and light can enter into the optical waveguide. The open end or the open ends of the optical waveguides in the contact surface can be equipped with or without lenses or other means for optical focusing or dispersal of light. The optical waveguide is an optically conducting fiber which is generally surrounded by a casing, apart from the open end or the open ends. Optical waveguides and casings together produce optical waveguide cables which are known per se in the prior art. The optical waveguides can consist, for example, of glass fibers or the like. The above-used term of an optical connection is a connection which is provided for optical data transmission. An electrical connection is a connection via which electric data or information can be exchanged and/or a power supply or voltage supply takes place. 
         [0012]    A connector and also a mating connector are, generally speaking, means for producing a connection between at least two cables or at least one cable and a device. In the present case, the cables have one or more optical waveguides and one or more electric lines. The term mating connector has been introduced in order to be able to differentiate linguistically between connector and mating connector. The mating connector is a corresponding different connector, wherein the connector and the mating connector or other connectors can be brought together in a bringing-together direction or are connectable to one another in such a manner that the optical connection and also the electrical connection are produced. Both the connector according to the invention and the mating connector can be what is referred to as a chassis socket, which could also be called a device socket. Chassis sockets are known per se. They are those connectors which are attached to devices or to housings thereof. However, both the connector according to the invention and the mating connector can also be designed as what are referred to as cable connectors. Cable connectors are the connectors which are fastened to the above-mentioned cable. In order to connect two cables to each other, cable connectors are attached in each case to the two cables to be connected to each other. In order to connect a cable to a device or to the housing thereof, a chassis socket is generally attached to the device and a cable connector to the cable. 
         [0013]    In general, the connectors could also be called plugs. When connector and mating connector are brought together, it would then also be possible to refer to this as plugging together. However, the connectors according to the invention and also the mating connectors corresponding thereto can be connected to one another not only by plugging one inside another but also by screwing together or other types of connections or combinations thereof. 
         [0014]    The releasable and reconnectable connecting device with which the housing attachment part can be connected releasably to the connector main housing is a connecting device which is provided and designed in order for the connection produced by it to be able to be repeatedly released and restored. This therefore involves in particular a destruction-free type of release and reconnection. Particularly preferably, the releasable and reconnectable connecting device with which the housing attachment part is fastened releasably to the connector main housing is a screw connection which is known per se. 
         [0015]    Alternatively, however, other releasable and reconnectable connecting devices which are known per se and are intended for fastening the housing attachment part to the connector main housing can also be realized in the invention. An example thereof which can be mentioned are bayonet catches or secured plug-in connections. Secured plug-in connections are those in which the plug-in connection can only be released again when a corresponding securing means is released. Bayonet catches are a connection in which the parts to be connected are plugged one in another and are subsequently rotated in an opposite direction to one another in order to be connected to one another. The release takes place by rotation and pulling apart in the correspondingly opposite directions. 
         [0016]    All mentioned types of a connecting device, as seen by themselves, are known. 
         [0017]    It is particularly preferably provided that the electric contact of the connector main housing and/or the electric extension contact of the housing attachment part are of pin-like design. 
         [0018]    In order to make the connector according to the invention particularly operationally reliable, preferred embodiments of the invention provide that the electric contact of the connector main housing is arranged completely recessed within a sheath which is open, preferably exclusively, on the end side and is arranged on the connector main housing. 
         [0019]    In preferred embodiments, the electric contact of the connector main housing and the electric extension contact of the housing attachment part are configured for electrical power transmission with operating voltages of 40 volts to 600 volts. In this connection, both direct current and alternating current are possible. 
         [0020]    In preferred embodiments, the housing attachment part has a through channel which is open on its two end sides and in which the optical waveguide carrier is arranged in the interconnected state of connector main housing and housing attachment part. 
         [0021]    Particularly preferred embodiments provide that the connector according to the invention is a cable connector and, as seen in the interconnected state of connector main housing and housing attachment part, a cable leads into the connector main housing on that side of the connector main housing which is opposite the housing attachment part. 
         [0022]    The housing attachment part is preferably a protruding or male extension of the connector that, upon connection with the mating connector, penetrates into the latter or into a female socket of the mating connector. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0023]    Further features and details of preferred variants of a connector according to the invention are explained below in the description of the figures with reference to an exemplary embodiment according to the invention of the connector. In the figures: 
           [0024]      FIGS. 1 and 2  show perspective views of the exemplary embodiment of the connector according to the invention; 
           [0025]      FIG. 3  shows a perspective view in which the housing attachment part is removed from the connector main housing; 
           [0026]      FIG. 4  shows an exploded illustration of the components of the exemplary embodiment according to the invention of a connector shown in the figures; 
           [0027]      FIGS. 5 and 6  show longitudinal sections through the connector according to the invention, and 
           [0028]      FIG. 7  shows a longitudinal section through the connector according to the invention when the latter is connected to a mating connector. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0029]      FIGS. 1 and 2  illustrate the connector according to the invention in an operating position in which the housing attachment part  4  is fastened to the connector main housing  3  by the connecting device  6 . On that side of the connector main housing  3  which is opposite the housing attachment part  4 , the cable  16  leads through the cable bushing  19  into the connector main housing  3 . The housing attachment part  4  forms a male extension which, in this exemplary embodiment, can be protected by a protective cap  17 . The protective cap  17  is fastened captively to the housing attachment part  4  by a loss guard  18  which is in the manner of a cord here. In  FIG. 1 , the protective cap  17  is placed onto the male extension of the housing attachment part  4 . In  FIG. 2 , the protective cap  17  is illustrated pulled off. As a result, in  FIG. 2 , the view is into the front open end of the housing attachment part  4 . The contact surface  9  of the optical waveguide carrier  5  with the open ends  10  of the optical waveguides  11 , which open ends are arranged in a row here, is seen there. The channels  30  in which the electric extension contacts  8  are located are arranged therebelow. This can be readily seen in detail especially in  FIGS. 5 and 6  as are described further on. 
         [0030]      FIG. 3  now illustrates the housing attachment part  4  released from the connector main housing  3  after release of the connecting device  6 . The internal thread  23  on the connector main housing  3  and the external thread  24  on the housing attachment part  4  are readily seen here. These two threads  23  and  24  together form a screw connection which, in this exemplary embodiment, forms the releasable and reconnectable connecting device  6 . Alternatively, however, as already explained at the beginning, other connection forms, such as, for example, a bayonet catch or a secured plug-in connection, could be used here in order to connect the housing attachment part  4  to the connector main housing  3  in a releasable and reconnectable manner. In the exemplary embodiment shown, this screw connection of the connecting device  6  is secured. For this purpose, in this exemplary embodiment, the securing studs  35  are arranged on the rear part  22  of the connector main housing  3 . In the screwed-together state, the securing ring  28 , which is particularly readily visible in  FIG. 4 , engages in said securing studs. If the screw connection is intended to be released, the securing ring  28  has to be pulled forward, i.e. away from the rear part  22  of the connector main housing  3 , in such a manner that the securing studs  35  become disengaged from the securing ring  28 . Only then can the rear part  22  of the connector main housing  3  be unscrewed, by rotation about its longitudinal axis, from the housing attachment part  4  in this exemplary embodiment. The securing ring  28  is pulled away from the rear part  22  of the connector main housing  3  by compression of the pretensioning spring  34  which pretensions the securing ring  28  in the direction of the securing studs  35 . 
         [0031]    In the position illustrated in  FIG. 3 , the housing attachment part  4  is pulled off from the connector main housing  3  counter to the connecting direction  12 . By this arrangement, the optical waveguide carrier  5 , which is arranged on the front part  21  of the connector main housing  3 , has also been pulled, by the open ends  10  of the optical waveguides  11 , out of the through channel  15  of the housing attachment part  4 . The through channel  15  has open ends at each of its two opposite end sides  14 , and therefore, when housing attachment part  4  and connector main housing  3  are joined together in connecting direction  12 , the optical waveguide carrier  5  can penetrate into the through channel  15 . 
         [0032]    The individual components of the connector  1  according to the invention that is illustrated here can be seen readily in the exploded illustration according to  FIG. 4 . The electric lines  25  and the optical waveguide cables with the optical waveguides  11  lead out of the cable  16  which is guided through the cable bushing  19  and the rear part  22  of the connector main housing  3 . The optical waveguides  11  are fastened in the optical waveguide carrier  5 , their open ends  10  lead into the contact surface  9  of the optical waveguide carrier  5 . The electric lines  25  lead into the electric contacts  7  of the connector main housing  3 . In the exemplary embodiment shown, there are a total of four electric contacts  7  and correspondingly also four electric lines  25 . Two thereof can serve, for example, for electric data transmission and another two thereof for electric power transmission. The front part  21  of the connector main housing is preferably comprised of electrically insulating material, such as, for example, plastic. In this exemplary embodiment, said part also bears the sheaths  13  of the electric contacts  7 , as can be seen even better in the following figures or the sectional illustrations thereof. 
         [0033]    It can readily also be seen in  FIG. 4  that, in this exemplary embodiment, the housing attachment part  4  is also of multi-part design. The latter first of all has the insert  26  which can be manufactured, for example, from plastic or from another electrically insulating material. In this exemplary embodiment, the through channel  15  of the housing attachment part  4  with its respective open ends on the end sides  14  is also located in this insert  26 . Furthermore, the channels  30  in which the electric extension contacts  8  are arranged are also located in the insert  26 . The sealing ring  29  can be designed as known per se in the prior art. The casing  27  of the housing attachment part  4 , which sheaths the insert  26  in the assembled state, can be formed, for example, from metal. The function of the securing ring  28  and of the pretensioning spring  34  pretensioning the latter has already been explained further above. 
         [0034]      FIGS. 5 and 6  show longitudinal sections through the connector  1  according to the invention of this exemplary embodiment. In  FIG. 5 , the housing attachment part  4  is connected to the connector main housing  3  by the connecting device  6 . In  FIG. 6 , the connecting device  6  has been released and the housing attachment part  4  has been pulled off from the connector main housing  3  counter to the connecting direction  12 . 
         [0035]    In this exemplary embodiment, the electric contacts  7  of the connector main housing  3  are connected to the electric extension contacts  8  in the housing attachment part  4  via a plug-in connection in the position according to  FIG. 5 . It can be particularly readily seen in  FIGS. 5 and 6  how, according to the invention, the optical waveguide carrier  5  and the electric contacts  7  are arranged on the connector main housing  3  and the housing attachment part  4  has the electric extension contacts  8  which are connectable to the electric contacts of the connector main housing  3  by connection of the housing attachment part  4  to the connector main housing  3 . It can also be readily seen in  FIG. 6  that the electric contact surface  9  of the optical waveguide carrier  5 , into which contact surface the open ends  10  of the optical waveguides  11  of the connector  1  lead, are arranged offset with respect to the electric contacts  7 , as seen in the connecting direction  12 . The offset is identified in  FIG. 6  by the reference sign  36 . It can also be readily seen in  FIG. 6  how the contact surface  9  of the optical waveguide carrier  5  protrudes further from the rest of the connector housing  3  than the electric contact  7  of the connector main housing  3 . Furthermore, it can also be readily seen that the electric contacts  7  of the connector main housing  3  are arranged completely recessed within the sheath  13  which is open exclusively in the end side and is arranged on the connector main housing  3 . In the separated position of connector main housing  3  and housing attachment part  4  that is illustrated in  FIG. 6 , the contact surface  9  and therefore the open ends  10  of the optical waveguides  11  can be cleaned without the person undertaking said cleaning running the risk of suffering an electric shock on the electric contacts  7  or being injured in some other way. 
         [0036]      FIG. 7  likewise shows a longitudinal section, wherein the connector  1  according to the invention of the previously described exemplary embodiment is connected here, however, to a corresponding mating connector  2 . The mating connector  2  here is a chassis socket into which the male extension of the housing attachment part  4  is pushed in order to produce the connection. In the connecting position illustrated, the electric contacts  7  of the connector main housing  3  are in electrically conductive connection with corresponding electric contacts  33  of the mating connector  2  via the electric extension contacts  8 . The optical waveguide carrier  5  of the connector main housing  3  lies directly with its contact surface  9  against a contact surface  32  of an optical waveguide carrier  31  of the mating connector  2 . By this arrangement, the open ends  10  of the optical waveguides  11  of the connector  1 , which open ends are arranged in the contact surface  9 , come into light-conducting connection with corresponding open ends of optical waveguides  37  of the mating connector  2 , and therefore optical signals can be transported to and fro via said connection. The electric lines  25  of the connector  1  are electrically conductively connected to the electric lines  20  of the mating connector  2  via the electric contacts  7 , the electric extension contacts  8  and the electric contacts  33 . 
         [0037]    For the sake of completeness, it is also pointed out that the protective cap  17  and the loss guard  18  are not illustrated in  FIG. 7 . 
         [0038]    Key to the Reference Numbers: 
         [0000]    
       
         
               
               
             
           
               
                   
               
             
             
               
                 1 
                 Connector 
               
               
                 2 
                 Mating connector 
               
               
                 3 
                 Connector main housing 
               
               
                 4 
                 Housing attachment 
               
               
                 5 
                 Optical waveguide carrier 
               
               
                 6 
                 Connecting device 
               
               
                 7 
                 Electric contact 
               
               
                 8 
                 Electric extension contact 
               
               
                 9 
                 Contact surface 
               
               
                 10 
                 Open end 
               
               
                 11 
                 Optical waveguide 
               
               
                 12 
                 Connecting direction 
               
               
                 13 
                 Sheath 
               
               
                 14 
                 End side 
               
               
                 15 
                 Through channel 
               
               
                 16 
                 Cable 
               
               
                 17 
                 Protective cap 
               
               
                 18 
                 Loss guard 
               
               
                 19 
                 Cable bushing 
               
               
                 20 
                 Electric line 
               
               
                 21 
                 Front part 
               
               
                 22 
                 Rear part 
               
               
                 23 
                 Internal thread 
               
               
                 24 
                 External thread 
               
               
                 25 
                 Electric line 
               
               
                 26 
                 Insert 
               
               
                 27 
                 Casing 
               
               
                 28 
                 Securing ring 
               
               
                 29 
                 Sealing ring 
               
               
                 30 
                 Channel 
               
               
                 31 
                 Optical waveguide carrier 
               
               
                 32 
                 Contact surface 
               
               
                 33 
                 Electric contact 
               
               
                 34 
                 Pretensioning spring 
               
               
                 35 
                 Securing stud 
               
               
                 36 
                 Offset 
               
               
                 37 
                 Optical waveguide