RU2111541C1 - Method for alarming about intrusion attempt and device which generates alarm signal in case of intrusion attempt - Google Patents

Abstract

FIELD: protection of premises using additional tools for stock-produced locks. SUBSTANCE: device has moving plate and moving rest for the plate. Plate is spring-loaded and is located in housing so that one end of plate can enter into key hole, for example, of cylindrical mechanism of lock. Housing of plate is stationary mounted with respect to key hole. Plate rest is designed as similar spring-loaded plate which is mounted for longitudinal movement in plane of stationary base. Ends of both plates are located in opposite and have mechanic hooks. One end is also spring-loaded in cross direction. Alarm signal is generated when picklock or master key is removed from lock in case if lock has not been opened by either picklock or master key. EFFECT: increased protection. 15 cl, 1 dwg

Description

 The invention relates to means of protection and signaling and can be used as an individual set-top box for locks intended for the protection of critical facilities, such as apartments, public buildings, garages, etc.

 A known method of signaling an attempt to enter the room [1], the door of which is locked, by issuing an electrical signal in case of a failed attempt to open the lock with a master key. The combination lock for implementing the known method comprises an electronic circuit including logic elements, and a key electrically connected to the circuit. When using someone else's key (master key), a ban on opening the lock and a circuit for issuing an alarm are triggered.

 This method requires the availability of power, which complicates the method and limits its scope.

 There is another way of signaling an attempt to enter the room [2], the door of which is locked, which consists in the fact that before opening the lock by moving the movable element, the entrance to the key channel is released and at the same time an alarm circuit is activated with a delay time for operation of the exposure time, open the lock with a key, then enter the opening room and turn off the alarm: if the alarm is not turned off (the lock is not open), then after the exposure time the circuit is triggered t and gives an electrical signal about an attempt to penetrate into the stored room by an outsider.

 Compared with the first analogue, this method is simpler, since the use of electricity in it is not necessary, however, without the use of electricity, the presence of time delay complicates the method. In addition, since the movable element (the movable plate) that closes the entrance to the key channel is located outside the lock, directly on the door next to the lock, in this case a false alarm can be triggered by a stranger by hooligan motives without trying to open the lock.

 There is also a known method of signaling an attempt to enter a room [3], the door of which is locked, which means that when a key is inserted into the lock, the code combination of the key is compared with the code combination of the lock, the decoding device of the lock is set in motion by the key and when they do not match generate an alarm signal by turning the encoder at an angle less than the unlocking angle of the lock.

 A known method of signaling an attempt to enter a room whose door is locked is adopted as a prototype.

 A device for generating an alarm signal about an attempt to enter the room [3], the door of which is locked, contains an alarm driver, which includes a spring-loaded movable element placed with the possibility of its interaction with the stop, a lock in which the code element is located, the housing of which is aligned with the cylinder with a keyhole, a base, a spring element, and the code element is mounted in the base with the possibility of rotation about the axis of the cylinder, while ement formed as a protrusion fixed on the housing chip.

 The known device for generating an alarm about an attempt to enter the premises is taken as a prototype.

 The known device is devoid of the disadvantages of the second analogue, because, firstly, it does not have a time delay for the alarm to trigger, and secondly, the moving element is not placed inside the device, but inside it, therefore access to it by an unauthorized person is excluded.

The disadvantages of the prototype:
the complexity of the design, due to the introduction of a fixed base, which is essentially the second lock case,
A device for generating an alarm cannot be performed in an independent design as a prefix to the finished lock.

 The invention is aimed at eliminating the above disadvantages of the prototype.

 In the method of signaling an attempt to enter a room, the door of which is locked, that the key is inserted into the lock and an alarm is generated, the essence of the invention is that an alarm is generated when the key is removed from the lock, regardless of whether or not, before this comparison of the key combination of the key with the combination of the lock (i.e., an attempt to open the lock).

 In the device for issuing a signal about an attempt to enter a room, the door of which is locked, containing an alarm driver, which includes a spring-loaded movable element and a stop of the movable element, the invention consists in the fact that the spring-loaded movable element is placed in an additionally inserted housing and is made in the form of a plate with the possibility of placing one of the ends of the plate in the channel for the key, such as a cylinder lock mechanism, and with the possibility of fixing the plate body but relative to the channel for the key, and the emphasis of the spring-loaded movable element is made in the form of a spring-loaded plate with the possibility of its longitudinal movement in the plane of the additionally introduced fixed base, while the ends of both plates are placed opposite each other and provided with mechanical hooks and at least one of these ends spring loaded in the transverse direction.

 The drawing shows a schematic diagram of a device for generating an alarm about an attempt to enter the room: the device works in conjunction with a cylinder lock mechanism, the drawing is shown in section along the key channel.

 The cylinder lock mechanism comprises a housing 1 with spring-loaded pins 2, inside of which there is a cylinder 3 with a key channel 4 and pins 5, and a protrusion 6 is made along the channel 4, preventing the pins from slipping. A cup 7 is rigidly fixed to the cylinder 3, the axis of which is a movable element made in the form of a L-shaped plate 8, one end of which is placed in the cylinder channel 4, and the other extends beyond the cup 7. The plate 8 is spring-loaded with a spiral spring 9, abutting on the one hand, into the bottom of the cup 7, and on the other, into the protrusion 10 of the plate 8. The plate 8 is placed parallel to the axis 0-0 of the cylinder 3 at a certain distance a from the axis. Opposite the plate 8, a similar movable plate 11 is placed which performs the function of the stop of the movable element (the function of the stop of the plate 8), which is connected to the fixed base 12 via a dovetail mechanical connection (not shown) and is provided with a protrusion 13 that restricts the movement of the plate 11 to the left by the stop of the protrusion 13 in the protrusion 14 of the base 12. In addition, the plate 11 in the right direction is spring-loaded with a leaf spring 15 abutting against the protrusion 13 of the plate, while the spring 15 is larger than the spring 9 e weak. The plates 8 and 11 are placed in one vertical plane (in the drawing plane), the ends of the plates 8 and 11 facing each other are equipped with end bevels 17 and mechanical hooks, including recesses 18 and the protrusions 19 interacting with them, while at least one of the plates 8 or 11 (for example, plate 8) is made of elastic material, so that its end, equipped with a mechanical hook, can bend in the transverse directions.

 The proposed method of signaling an attempt to enter the premises is implemented in the following sequence. The master key or key is inserted into the lock. An alarm is issued when a master key or key is removed from the lock if the master did not manage to open the lock and the lock did not open with the key. In short, an alarm is issued when you remove from the castle any item previously entered into the castle.

 In the initial position, the right end of the plate 8 is placed in the cylinder channel 4, and the beveled ends of the plates 8 and 11 are placed opposite each other, while the plate 11 is placed in its leftmost position, since the spring 15 and the plate 8 prevent it from moving to the right.

 When a key or a master key is inserted into the channel 4, the plate 8 is forced out of the channel 4, and the spring 9 is compressed, while the plate 8 abuts against the fixed plate 11, slightly bends upward and finds itself on the plate 11, after which both plates are fastened together by hooks 18, 19, and the plate 8 remains in a bent state, and two options are possible.

 First option. When a regular key is inserted into channel 4 after turning the cylinder 3 with a key, the lock opens, and the plate 8 disengages from the plate 11, straightens and moves along an arc of radius a. After turning the cylinder 3 with the key in the opposite direction (and closing the lock), the straightened plate 8 abuts with its lateral side against the side of the plate 11, while slightly bending. When the key is subsequently removed from the channel 4, the plate 8, under the action of a spring 9, takes its initial position.

 The second option. When the master keys are inserted into channel 4 and the lock is subsequently failed to open (key cylinder 3 failed to turn) at the moment the master key is removed from channel 4, the spring 9 is unclenched and, overcoming the resistance of the spring 15, inserts the plate 8 into the channel 4, with which it is fastened to the right and fastened with it plate 11.

 The fact of moving to the right of the plate 11 is the primary signal of an attempt to penetrate into the protected room.

 To bring the device to its initial position, you must enter the key in channel 4, so that the plate 8 moves to the left under the action of the key, and the plate 11 moves to the left under the action of the spring 15 and takes the initial position, after which it is necessary to open the lock (turn the cylinder 3 with the key), again close and remove the key from channel 4.

Claims (3)

 1. A method of signaling an attempt to enter a room whose door is locked, the key being inserted into the lock and generating an alarm signal, characterized in that when the key is inserted into the lock, the spring-loaded movable element is engaged with the spring-loaded plate of its stop, and the alarm is generated when the key is removed from the lock, provided that the spring-loaded stop plate is moved.  2. The method according to claim 1, characterized in that the spring-loaded stop plate is moved in the longitudinal direction.  3. A device for generating an alarm signal about an attempt to enter a room, the door of which is locked, containing a key channel and an alarm driver, which includes a spring-loaded movable element and its emphasis, characterized in that the spring-loaded movable element is placed in an additionally inserted housing and is made in the form of a spring-loaded plate placed at one end in the channel for the key, and the emphasis of the spring-loaded movable element is made in the form of a spring-loaded plate with the possibility of its longitudinal about moving in the plane of the additionally introduced fixed base, while the ends of both spring-loaded plates are placed opposite each other and equipped with mechanical hooks with the possibility of their engagement when entering the key into the key channel and their subsequent disengagement when turning the key, one of these ends being spring-loaded in the transverse direction.