Abstract:
The mechatronic locking apparatus comprises a control circuit ( 4 ), from which information signals can be transmitted to a control circuit ( 6 ) of the lock cylinder ( 2 ) using a first communication path ( 5 ). A security key ( 3 ) has at least one second communication path ( 7 ) for storing and/or processing access data. The two communication paths ( 5, 7 ) are connected to said control circuit ( 4 ) of the security key ( 3 ). The first communication path ( 5 ) preferably uses an electrical contact in the lock cylinder ( 2 ). The second communication path ( 7 ) comprises a transponder ( 8 ). The first communication path ( 5 ) may also be used for power supply purposes.

Description:
FIELD 
     The invention relates to a mechatronic locking apparatus (i.e., mechanical electrical) having a lock cylinder and an associated security key which has a control circuit from which information signals can be transmitted to a control circuit of the lock cylinder via a first communication path. 
     BACKGROUND 
     A mechatronic locking apparatus of this kind has been disclosed, for example, in WO 2007/073608 by the same applicant. Information signals can be transmitted to the control circuit of the rotary lock cylinder by means of the control circuit. Signals are transmitted via an electrical contact element which is arranged in the keyway of the rotary lock cylinder. One significant advantage of a locking apparatus of this kind is that increased security is possible by virtue of an electronically secured user identification means. A user identification means of this kind can result in it being possible to operate the rotor using the inserted key only by providing a predetermined item of electronic information. The rotor is unlocked, for example, by means of an actuator which has a blocking element which can be moved between a blocking position and an unblocked position by a motor. 
     The rotary lock cylinder of a locking apparatus of this kind can be operated in a “stand-alone” manner or in a networked manner. A networked system having a plurality of mechatronic locking apparatuses is disclosed in WO 2006/056085 by the same applicant. This system has a computer having software for monitoring access authorizations and having at least one database containing data relating to the access authorizations. The data generally comprises the names of the authorized users, a list of the locking apparatuses to which these users have access, and information, for example, for time windows within which these users are authorized to gain access. Systems of this kind make it possible for mutations to be made from a control center in a simple and quick manner via a network. 
     US 2005/0077995 discloses a locking apparatus having a key with which user-specific data is transmitted to the lock cylinder when the key is inserted into the lock cylinder. The user-specific data is that from a fingerprint sensor which is arranged on the grip of the key. The lock cylinder can be operated when the user-specific data has been identified as authorized and, in addition, the rotor is mechanically unblocked by the key. The user-specific data is transmitted from the key to the lock cylinder by means of an electrical contact in the lock cylinder or in a contactless manner. A locking apparatus in which the locking security is likewise intended to be increased by means of data from a fingerprint sensor has also been disclosed by WO 2005/013181. The locking apparatus according to EP-A-0743411 has also disclosed that an electronic code generator is arranged in the key and an electronic code evaluation means is arranged in the cylinder housing. The code is transmitted using a transponder and a transponder reading device. WO 2009/036585 discloses a lock device which has an electronic module for receiving data from an identification unit and an electric motor for operating the blocking and/or coupling device. In the event of operation, the electric motor acts as a generator in order to charge the energy storage means for the electronic module. 
     SUMMARY 
     The invention is based on the object of providing a locking apparatus of said type which is even more suitable for such systems. 
     In the case of a locking apparatus of this generic type, the object is achieved in that the security key has at least a second communication path for the purpose of storing and/or processing access data. In the locking apparatus according to the invention, the security key has at least two communication paths. The first communication path is created by means of an electrical contact in the lock cylinder. A significant advantage of the apparatus according to the invention is that it is also possible to supply power via this first communication path. This can be performed, in particular, by means of a battery which is arranged in the security key. However, the battery can, in principle, also be arranged in the lock cylinder. The two communication paths are each connected to the control circuit of the security key. The locking apparatus according to the invention can also be an electronically secured lock cylinder which does not have any mechanical security means, that is to say does not contain bolts and pins as is otherwise customary. 
     The second communication path is RFID-based and allows data to be read and input into the control circuit of the security cylinder in a contactless manner by means of a read device or write device. Therefore, in the case of the locking apparatus according to the invention, communication is possible via two paths. The data in the control circuit which is arranged on the security key can be used via the two communication paths and therefore both via RFID and also via the electrical contact in the lock cylinder. Irrespective of the communication path, the access data can be processed via a circuit. This is also true of other data. This data can be written, read and changed both via the first and via the second communication path, and also centrally stored and managed. 
     According to a development of the invention, provision is made for the control circuit in the lock cylinder to be performed by means of bidirectional communication. 
     Power is also supplied via the same electrical connection. In addition, provision is made for the control circuit of the lock cylinder to communicate with the control circuit of the security key by means of a modulated current. 
     According to a development of the invention, provision is made for the data to be transmitted in encrypted form via the first and via the second communication path, and also to be stored in encrypted form. Provision is also made, according to one development of the invention, for the security key to contain an identification and/or authentication mechanism. The data for identification and authentication are preferably transmitted and stored in encrypted form. 
     According to one development of the invention, provision is made for the control circuit which is arranged in the key to have a clock which can be read from and changed via the two communication paths. The authorization for manipulation is therefore possible by means of data management via the two communication paths. 
     Further advantageous features can be found in the dependent patent claims, the following description and the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       An exemplary embodiment of the invention will be explained in greater detail below with reference to the drawings, in which: 
         FIG. 1  schematically shows a locking apparatus according to the invention, 
         FIG. 2  shows a view of the front face of a lock cylinder of the locking apparatus according to the invention, and 
         FIG. 3  shows a circuit diagram of the locking apparatus according to the invention. 
     
    
    
     DETAILED DESCRIPTION 
     The locking apparatus  1  according to the invention has, according to  FIG. 1 , a security key  3  which has a shank  22  and a grip  23 . The security key  3  is used to operate the lock cylinder  2  which is shown in  FIG. 2 . Said lock cylinder has a rotor  25  and a stator  26  for enabling the rotor  25  to rotate, for which purpose the shank  22  of the key is inserted into a keyway  10  in the rotor. In this case, tumblers (not shown here) are arranged in a manner which is known per se. 
     A control circuit  4  which is fed by an energy source  11 , in particular a battery, is arranged in the grip  23  of the key  3 . The control circuit  4  and the energy source  11  are arranged, for example, in a recess (not shown here) in the grip  23  and covered by a cover or the like (not shown here). The control circuit  4  is used, in particular, for storing and processing access data. This access data can be written to the control circuit  4 , read from said control circuit and changed by means of a control center  13 , for example by means of a laptop. This data can be stored and managed in the control center  13 . Communication for these processes is possible via two paths. Said paths will be described in greater detail below. 
     The first path, via which the control center  13  can communicate with the control circuit  4 , has a first communication path  5  which connects the control circuit to a contact means  8  which is arranged on the security key  3 . This contact means  8  is, for example, a contact plate which is arranged on the outside at the rear end of the shank  22 . If the shank  22  is inserted into the keyway  10 , the contact means  8  is electrically connected to a contact means  9  which, according to  FIG. 2 , is arranged like in the keyway  10 . This first communication path  5  is formed by a signal line which connects the control circuit  4  to the contact means  8 . Said signal line runs in the key  3 . The contact means  9  is connected to a control circuit  6  which, according to  FIG. 2 , is arranged in the stator  26 . Said control circuit  6  controls, for example, an actuator which is described, for example, in WO 2007/073608. If the shank  22  is inserted into the keyway  10 , the control circuit  4  transmits the authorization data to the control circuit  6  via the first communication path  5 . This data is checked in the control circuit  6 . If authorization is granted, the actuator is accordingly operated. 
     If the security key is a reversible key, both sides of the key or both sides of the keyway are provided with an electrical contact element. 
     The second path has a second communication path  7  which connects the control circuit  4  to a transponder  15  which is known per se and which is likewise arranged in the grip  3 . This transponder  15  has an antenna  27  ( FIG. 3 ) which is known per se and which allows contactless communication with a read device  24 . The transponder  15  allows RFID-based transmission of data between the circuit  4  and the control center  13  which is connected to the read device  24  for signal transmission. This read device  24  can be used to read data from, input data into and change data in the control circuit. In addition, the data in the control center  13  can be stored and then managed in said control center by means of the read device  24 . Therefore, in the locking apparatus according to the invention, data transmission is possible by means of the contacts  8  and  9 , and RFID-based data transmission or communication is also possible. As mentioned above, feeding via the first communication path  5  is possible. In addition, energy can be supplied via the antenna  27  of the transponder  15  or via RFID. As shown in  FIG. 3 , a power control means  16  which is connected to the energy source  11  and to a voltage converter  12  is provided. This power control means  16  switches at least parts of the circuit  4  on and off in order to keep the energy consumption as low as possible. Many batteries have, on account of their internal resistance, a large voltage drop at current peaks. The voltage converter  12  makes it possible to compensate for a voltage drop in the battery. In order to reduce the quiescent current, the voltage converter  12  is preferably switched off in the inoperative state. When the key  3  is inserted into the lock cylinder  2 , the voltage converter  12  is switched on and compensates. The voltage drop which was caused by the current peaks. According to  FIG. 3 , the control circuit  4  has a system detector  20  which switches on the respectively required process. The switch-on operation is performed on the basis of the relevant system and therefore selectively via the first communication path  5  or via the second communication path  7 . The system detector  20  is accordingly connected to the contact means  9  or to the transponder  15 . 
     The circuit  4  also has encryption means  17  and a clock  14 . The clock  14  is protected by the encryption means  17 . The clock  14  can be read from and changed both via the first communication path  5  and via the second communication path  7 . The authorization for manipulation of the clock  14  is controlled by the data processing means. 
     The control center  13  is likewise protected by an encryption means  19 . Said control center has at least one data storage means  18  and means for data management  21 . The control center  13  can, as shown, communicate with the control circuit  4  via the first communication path  5  or via the second communication path  7 . In addition, a firmware update can be carried out via the first communication path  5  and via the second communication path  7 . 
     Communication is performed by means of the second communication path  7  in accordance with the respectively indicated standards of the transponder technology used. One or more RFID technologies can be processed, for example, at frequencies of 13.56 MHz or 125 kHz. The control circuit  4  can be directly connected to the RFID antenna  27  and communicate via said RFID antenna. 
     Provision is made for the storage and processing of the following data and characteristics in particular:
         uniqueness numbers   access authorizations   time zones   time windows   block lists/withdrawal of authorization   status information   history information   segmentation of data for third party users   grouping of users       

     LIST OF REFERENCE SYMBOLS 
     
         
           1  Locking apparatus 
           2  Lock cylinder 
           3  Security key 
           4  Control circuit 
           5  First communication path 
           6  Control circuit 
           7  Second communication path 
           8  Contact means 
           9  Contact means 
           10  Keyway 
           11  Energy source 
           12  voltage converter 
           13  Control center 
           14  Clock 
           15  Transponder 
           16  Power control means 
           17  Encryption means 
           18  Data storage means 
           19  Encryption means 
           20  System detector 
           21  Data processing means 
           22  Shank 
           23  Grip 
           24  Read device 
           25  Rotor 
           26  Stator 
           27  Antenna 
         (RFID antenna)