Abstract: The invention concerns a locking/unlocking device for a swivel latch of a door opener with a locking lever, that locks or unlocks the swivel latch, and a safety lock that holds the locking lever in a locking position and can be swiveled with the help of an electromagnet in a position unlocking the locking lever, wherein the safety lever is positioned in its center of gravity. Thus only one safety lever is required for the impact safety of the door opener, the susceptibility to shocks and vibrations can be reduced and a space-saving arrangement can be achieved. In a preferred form of execution, the safety lever has two arms wherein the electromagnet is in active connection with one lever arm and a compression spring is in active connection with the other lever arm. The assembly of the device is position-independent.

Abstract: A door locking system has a lock latch which is movable between a locked position projecting beyond a door lock cuff and a unlocked position retracted in the direction of the door lock cuff, and has a lock latch blocking device, movable between a blocking position and a release position, which fixes the lock latch in the locked position in the blocking position retracted toward the door lock, and releases the lock latch in the release position, which is extended in relation to the blocking position, in such a way that the lock latch is displaceable between the locked position and the unlocked position. The door locking system has a driver control mechanism.