Anti-cracking burglar alarm

Abstract

The invention discloses an anti-cracking burglar alarm using a multi-core connecting lead; any two core leads are regarded as control signal core leads, and the other core leads are safety protection core leads; the two control signal core leads are communicated with a circuit board and a magnetic control switch; one end of each safety protection core lead is connected with the circuit of the alarm for controlling the loudspeaker to sound, and the other end of each safety protection core lead is hollowly connected; the magnetic switch is correspondingly turned on or off by the switch on the door of a controlled chamber; the magnetic switch is turned on or off to control the loudspeaker to sound or not to sound; when at an alert state, if the control signal core lead is disconnected, the magnetic switch is turned off relatively and the loudspeaker sounds; if the safety protection core lead and the control signal core lead are short connected at random, the circuit for controlling the loudspeaker to sound is communicated and the loudspeaker sounds; if thefts want to break the alarm, what is just to do is short connect the two control signal lines, but the probability is lower according to the principle of combined probability; therefore, the alarm has remarkable anti-cracking characteristic.

Description

technical field [0001] The invention relates to an anti-theft alarm, in particular to an anti-cracking anti-theft alarm. Background technique [0002] There are many types of alarms on the market now, their working principles are different, and the prices are also very different. However, in actual use, there are often problems such as high false alarm rate, low reliability, or missed alarms. [0003] With the popularization of scientific and technological knowledge, most alarms are easy to be "technically cracked". In the actual use of ordinary alarms, there is often a certain distance between the control room and the controlled room, and the exposed connecting wires may be cut or shorted. If the connecting wires of this kind of alarm are cut off, the alarm will be triggered; however, if the connecting wires are short-circuited, it will lose the anti-theft alarm function. In actual use, there are obvious hidden dangers, which reduces the safety of the alarm. Reliability; a...

AI Technical Summary

Problems solved by technology

[0002] There are many types of alarms on the market now, their working principles are different, and the prices are also very different. However, in actual use, there are often problems such as high false alarm rate, low reliability, or missed alarms.

[0003] With the popularization of scientific and technological knowledge, most alarms are easy to be "technically cracked". In the actual use of ordinary alarms, there is often a certain distance between the control room and the controlled room, and the exposed connecting wires may be cut or shorted. If the connecting wires of this kind of alarm are cut off, the alarm will be triggered; however, if the connecting wires are short-circuited, it will lose the anti-theft alarm function. In actual use, there are obvious hidden dangers, which reduces the safety of the alarm. Reliability; although the connecting wires can also be protected by physical methods such as "burying wires" or "piping through pipes", the cost is relatively high; while other relatively safe and reliable alarms are often complex in technology and high in cost, it is difficult to Promotion and use among ordinary household users

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