Alarm device

An alarm device (1) consisting of a base (2), a cover (3), a movable connection (4) between the cover (3) and the base (2), and elements for detecting changes in the position of the cover, while the base (2) is made with the possibility of its installation on the surface of the protected object in the area (7) of the lock of the protected object, and the cover (3) is attached to the base (2) by means of a movable connection (4) between the cover (3) and the base (2) with the possibility of moving the cover (3) relative the base (2) to close and open access to that area (7) of the lock of the protected object, which is necessary to open this lock, and elements for detecting the change in the position of the cover (3) are made with the possibility of interaction with the alarm system when the cover (3) moves relative to the base (2), characterized in that it contains a system for detecting the change in the state of the cover (5), which is formed at least from the cover (3), from the movable connection (4) between the cover (3) and the base (2) and at least from one electronic component (6), which, when the state of the cover (3) changes, interacts with the alarm system, while part of at least one of the elements of the system for detecting the change in the state of the cover (5) in the position of the alarm device (1), when the cover (3) closes area (7) of the lock of the protected object, access to which is necessary to open this lock, is located in front of this area (7) of the lock of protected object, access to which is necessary to open this lock.