Door unlocking device

A door unlocking device comprising:

• an electric operating mechanism responsive to a door-unlocking signal for unlocking a door;
• a lock including a rotor casing and a rotor having a key inserting inlet corresponding to the door;
• detecting means responsive to an insertion of a key into the key inserting inlet of the rotor for generating a key-detection signal and further including a shutter provided at the key inserting inlet and a shutter switch operated in response to an opening of said shutter to generate the key-detection signal;
• signal generating means responsive to a forward rotation and a reverse rotation of the rotor for generating a rotor-turning-pattern signal;
• and
• rotor-turning-pattern discriminating means responsive to the generated rotor-turning-pattern signal and the generated key-detection signal for generating the door-unlocking signal for unlocking said door.

A door unlocking device comprising:

• an electric operating mechanism responsive to a door-unlocking signal for unlocking a door and also responsive to a door-unlocking signal for locking the door;
• received signal discrimination means responsive to a radio wave signal for generating the door-locking signal and, alternatively, the door-unlocking signal;
• a lock including a rotor casing and a rotor having a key inserting inlet corresponding to the door;
• detecting means responsive to an insertion of a key into the key inserting inlet of the rotor for generating a key-detection signal;
• signal generating means responsive to a forward rotation and a reverse rotation of the rotor for generating a rotor-turning-pattern signal;
• and
• rotor-turning-pattern discriminating means responsive to the generated rotor-turning-pattern signal and the generated key-detection signal for generating the door-unlocking signal or unlocking said door.