Lock apparatus and lock system

A lock system including a lock apparatus capable of being locked and unlocked by an electronic key and a mechanical key, comprising:

• a mechanical key having a key plate portion in which a key groove is formed;
• a cylinder casing;
• a sleeve disposed rotatably inside the cylinder casing;
• a key cylinder disposed rotatably inside the sleeve and having a mechanical key insertion hole in which the mechanical key can be inserted;
• a tumbler disposed in the key cylinder;
• the tumbler being connected to the a sleeve so as to lock a rotation of the key cylinder with respect to the sleeve and when the mechanical key is inserted into the mechanical key insertion hole of the key cylinder so that the mechanical key engages the tumbler, the connection thereof with the sleeve being released so as to enable the rotation of the key cylinder with respect to the sleeve;
• a key cylinder lock actuator locking and unlocking a rotation of the sleeve with respect to the cylinder casing;
• a control unit disposed on the side of the key cylinder and carrying out transmission and reception of an electronic signal so as to perform ID verification between the control unit and the circuit chip generating the electronic signal and disposed on the side of the electronic key,
• the control unit, when an ID of the control unit and an ID of the electronic key coincide with each other as a result of the ID verification, sends a lock release signal to the key cylinder lock actuator so as to release a lock on the rotation of the sleeve with respect to the cylinder casing;
• and
• a key cylinder operating portion capable of rotating the key cylinder when the ID of the control unit and the ID of the electronic key coincide with each other as a result of the ID verification,
• whereby when as a result of the ID verification, the ID of the control unit and the ID of the electronic key coincide with each other and the rotation of the sleeve with respect to the cylinder casing is released and also when the tumbler engages the sleeve, the key cylinder is rotatable with the sleeve by operating the key cylinder operating portion.