Mechatronic locking device

A mechatronic locking system comprising

• a locking cylinder having a control circuit, and a security key that belongs to the locking cylinder and has a memory circuit,
• wherein information signals can be transferred between the control circuit of the locking cylinder and the memory circuit of the security key via a communication channel, wherein
• the security key further comprises a contact element which is connected to the memory circuit of the security key via a contact path integrated on the security key,
• wherein the locking cylinder further comprises a contact element, which is connected to the control circuit of the locking cylinder, wherein, with the security key inserted, the contact elements are electrically in contact with one another,
• wherein said communication channel between the control circuit and the memory circuit runs via the contact path integrated in the security key and via the two contact elements, and wherein the integrated contact path on the security key has a first path segment, which is electrically connected to the memory circuit, and has a second path segment, which adjoins the first path segment and is electrically connected to the contact element, wherein both path segments are equipped with elements for providing a radio link between the first path segment and the second path segment.