Patent attributes
A door access control system permitting electronic and mechanical unlocking includes a lock mounted to a door and an unlocking device matched with the lock. The lock can be set to be in a normal mode or an away mode. The unlocking device can be used to input a real-time unlocking identification information that is transmitted to the lock for comparison purposes. The lock can also be unlocked by a key. When the lock is set to be in the away mode, an alarm device is activated if the key is used. In this case, a first input device of the lock can be used to input a real-time alarm deactivating information to deactivate the alarm device. When the lock is set to be in the normal mode, the alarm device does not operate even if the key is used to unlock the lock.
