Doorlock with automatic intrusion protection by blocking the locking device

摘要

The invention relates to the protection of a doorlock, in which, if the lock cylinder or the cylinder plug is broken out, torn out or destroyed, a mechanism blocks the locking device of the lock in such a way that it is no longer possible to open the door from outside via the lock. One solution is to cover the locking device so that break-in tools, such as a picklock, can no longer engage into the locking mechanism and therefore can no longer release the bolt. This device can also prevent the bolt from being pushed back. Figure 1 shows a mechanical solution by means of a spring. Another solution mechanism provides for the direct blockage of the bolt, so that the latter can no longer be moved. After the lock cylinder has been destroyed, a door can be opened again by an authorised person via an unlocking mechanism. As a result of this cylinder protection, this lock, together with a suitable electronically monitored bolt contact accommodated in the stationary part of the door, can be used as a block lock for alarm systems.