CN2121721U - Multifunctional anti-theft alarm - Google Patents

Abstract

The multifunctional anti-theft alarm consists of a touch probe, a sound probe, a switch type probe delayer, a controller, a power amplifier and a doorbell sound generator, has the characteristics of simple structure, reasonable design, low cost, comprehensive functions and reliable performance, can give an alarm by impacting abnormally, knocking strongly and continuously and sleeving a lock, and is suitable for occasions with general anti-theft alarm requirements.

Description

Multifunction anti-theft siren

The utility model relates to a kind of multi-function robbery protection alarm.

At present commercially available various burglar alarms not only complex structure, volume is big, cost is high, and poor performance, rate of false alarm height are difficult to satisfy people's actual needs.

The purpose of this utility model provides a kind of rational in infrastructure, dependable performance, multi-function robbery protection alarm with low cost, uses for the place of general antitheft requirement, to improve the ratio of performance to price of existing burglar alarm, promotes the update of product.

Below in conjunction with accompanying drawing the utility model is elaborated:

Fig. 1 is an electric functional-block diagram of the present utility model;

Fig. 2 is an electrical schematic diagram of the present utility model.

Referring to accompanying drawing 1, the utility model is made up of touch probe 1, sound probe 2, switching regulator probe 3, chronotron 4, controller 5, amplifirer 6, doorbell acoustic generator 7, the output terminal of described touch probe 1, sound probe 2, switching regulator probe 3 is connected with the input end of chronotron 4, is serially connected with controller 5 between the input end of the output terminal of chronotron 4 and amplifirer 6; The output terminal of doorbell acoustic generator 7 also is connected with the input end of amplifirer 6.

Referring to accompanying drawing 2, the touch probe 1 in the utility model is by touch electrode M, resistance R ₁Triode T ₁T ₂, diode D ₁, relay J ₁Constitute; Sound probe 2 is by Electret condenser microphone S, resistance R ₃, R ₄, triode T ₃, capacitor C ₁Constitute; Switching regulator probe 3 is by microswitch KW ₁KW ₂, resistance R ₂Constitute; Chronotron 4 is by resistance R ₆-R ₉, triode T ₄, diode D ₂D ₃, capacitor C ₃Constitute; Controller 5 is by triode T ₅T ₆, diode D ₄, relay J ₂Constitute; Amplifirer 6 is by ic chip ₁KD9561, diode D ₅D ₆, triode T ₇, loudspeaker Y constitutes; Doorbell acoustic generator 7 is by button LA ic chip ₂CM108, diode D ₇Constitute.

Principle of work of the present utility model is as follows: when human metal object lock set, by triode T ₁T ₂The complex pipe saturation conduction that constitutes, relay J ₁Adhesive, power supply is through diode D ₂, resistance R ₇To capacitor C ₃Charging, when surpassing certain value as the lock set time, triode T ₄Conducting also makes by triode T ₅, T ₆The complex pipe saturation conduction that constitutes, relay J ₂Adhesive, and then make power discharging integrated block get electric work, loudspeaker Y sounding alarm.Meanwhile, relay J ₃Also adhesive, capacitor C ₂Through resistance R ₅Triode T ₅, T ₆Discharge, at this moment, even stop touch electrode M, triode T ₅T ₆Also must keep a period of time and just end, thereby realize that triggering warning certain hour stops warning function automatically.In like manner, bang into or brute force when knocking door K switch W as the people is improper ₁KW ₂Closed or amplify output by sound amplifier and make relay J ₁Adhesive, and then make loudspeaker Y sounding alarm one regularly automatically revert to the state of alert again.When owner is in, can be with K switch W ₃Manual switch, at this moment, if any the visiting LA, doorbell sound generation ic chip of pressing the button of people ₂Be triggered, its output signal drives power discharging transistor work, and by loudspeaker Y pronunciation.

Touch electrode M in the utility model is electrically connected with door lock; K switch W ₁, KW ₂Be installed between doorframe and the door leaf, and make it when door is closed, to be off-state Electret condenser microphone S and also be close to the door leaf inner face and install.

In sum, the utility model is simple in structure, reasonable in design, with low cost, complete function, dependable performance, and use in the place that is suitable for general burglar alarm requirement.

Claims (1)

1, a kind of multi-function robbery protection alarm, it is made up of touch probe (1), sound probe (2), switching regulator probe (3), chronotron (4), controller (5), amplifirer (6), doorbell acoustic generator (7), the output terminal that it is characterized in that described touch probe (1), sound probe (2), switching regulator probe (3) is connected with the input end of chronotron (4), be serially connected with controller (5) between the input end of the output terminal of chronotron (4) and amplifirer (6), the output terminal of doorbell acoustic generator (7) also is connected with the input end of amplifirer (6).

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