CN2076256U - Burglar alarm device - Google Patents

Abstract

The utility model discloses a burglar alarm device used on the door and the window, in particular to an electronic sound burglar alarm device used on the rolling door. The burglar alarm device uses a power supply switch which is synchronous with the rolling door lock to control the working power supply of the alarm device, the burglar alarm device is designed with a detector switch to provide the triggering alarm signal, and the detector switch is arranged on the alarm device into a whole, a switching circuit is driven to make a sound alarm circuit to work through a triggering circuit, and the alarm sound is generated. The burglar alarm device overcomes the defects of the traditional alarm device that the installation is not convenient, the construct is complex, and the cost is high. The utility model can be used in various doors and windows, and can also be used as a sound alarm device on the rolling door.

Description

Burglar alarm device

The utility model discloses a kind of electronic audio burglar alarm of the door and window that is mainly used in, particularly shutter door.

Burglar alarm is the visual plant of security system, and it is widely used in the place that bank, file store, office, shop and place of military importance etc. need the guard.The kind of existing alarm is a lot, and structure differs.Roughly can be by several patterns and combinations thereof such as switching mode, induction type, infrared, magnetic switchs.The alarm that is specifically designed to shutter door is representative with the product of a tame u s company.This product is divided into main frame and detector two parts: main frame is placed in the guard room, is connected with detector by lead, and the switching signal of utilizing detector to send here starts the main frame alarm work.The shortcoming of this product in use also has inconvenience except cost height, installation inconvenience, just can open shutter door or the like as need elder generation Shutdown Hosts.

Goal of the invention of the present utility model provides a kind of simple structure, the special-purpose burglar alarm of cost shutter door low, easy to use, dependable performance.

Figure of description 1 is the electric functional-block diagram of structure of the present utility model.

Figure of description 2 is electrical schematic diagrams of the present utility model.

Figure of description 3 is the detector switch K in the utility model ₂Organigram.Among the figure: 6 supports, 7 probes, 8 springs, 9 electrodes, 10 screws.

Technical essential of the present utility model can be understood as utilizes a working power with the synchronous power switch of shutter door lock control warning device, has designed one and has been installed in the detector switch K of one with warning device₂Provide triggering signal to make audible alarm circuit work through circuits for triggering driving switch circuit, produce alarm sound.

Now according to Figure of description, introduce structure of the present utility model in detail: a kind of burglar alarm, constituted by detector 1, trigger circuit 2, electronic switching circuit 3, audible alarm circuit 4 and power-supplying circuit 5, be it is characterized in that detector 1 is by detector switch K ₂Form, trigger circuit 2 are by integrated circuit U _1-1The reverser, the integrated circuit U that form _1-2, U _1-3The Schmidt trigger and the integrated circuit U that form _1-4Reverser three partial circuits of forming are barricaded as, and electronic switching circuit 3 is by transistor BG ₁, BG ₂The on-off circuit that is barricaded as constitutes, and audible alarm circuit 4 is by integrated circuit U ₂With transistor BG ₃, BG ₄And audio-frequency transformer (AFT) T, loudspeaker Y overlap and form, and power-supplying circuit 5 comprises battery E and K switch ₁Form.The overlap joint and the contact of concrete each one are: K ₂Insert the U in the Schmidt trigger _1-3Input end, the output of trigger is through reverser U _1-4Be input to BG ₁, BG ₂The input end of the electronic switching circuit that is barricaded as, U ₂Insert BG ₁, BG ₂Output terminal, be the load of electronic switching circuit, U ₂Output terminal directly promotes by BG ₃, BG ₄The power amplifier that is overlapped to form, the tone currents after the amplification exports loudspeaker Y to through audio-frequency transformer (AFT) T conversion.Battery E and K switch in the power-supplying circuit 5 ₁Serial connection, wherein K ₁Be limit switch, utilize the break-make of the change in location control power supply of dead bolt.

E is a power supply in the electrical schematic diagram of burglar alarm, is No. 2 common batteries of 4 joints.K ₁Be power switch, this switch is by the lock control on the shutter door, when shutter door is left behind, and K when locking ₁Closure, K when not locking ₁Disconnect; K ₂Being detector switch, is mechanical switch at this, when shutter door is pulled to ground, and K ₂Closure, K when lifting ₂Disconnect.Concrete structure as shown in Figure 3.R ₂, C ₁U _1-1Form delay circuit, work as K ₁When closed, can make U _1-1Input end produce the electronegative potential of short time, thereby at U _1-1Output terminal produce corresponding noble potential.U _1-3, U _1-2Form Schmidt trigger, work as U _1-3Be input as low level, U _1-2Input end when being high level, U then _1-3The output high level.Work as U _1-2When being input as low level, U _1-3Output keep high level; Work as U _1-3Input when becoming high level, U _1-3Output become low level immediately.U _1-4, R ₃, BG ₁, BG ₂Form negater circuit, simultaneously, provide big electric current to load.R ₄, R ₅Carry out dividing potential drop, for audio manifold block provides power supply.U ₂Be audio manifold block, add power supply after, promptly produce the alarm sound signal, BG ₃, BG ₄Form power amplifier, amplify alerting signal, thereby drive loudspeaker Y from audio manifold block.

Be example with the course of work more below, circuit performance be described further:

When shutter door drops down onto ground, touch probe, thereby make K ₂Closure when locking shutter door, makes K ₁Closed.At K ₁Closed moment, the A point is an electronegative potential, U _1-1Be output as noble potential, and the B point is an electronegative potential, U _1-3The output high level, U _1-4Output low level is so can not start the load of back.C ₁Through R ₂Charging, when making A become high level, U _1-1Output low level, and U _1-3Still export high level, this moment, alarm promptly was in the alert state for the treatment of.When not opening lock (K ₁Closed) and during the pull-up shutter door, K ₂Disconnect, the B point is a high level, U _1-3Output low level, U _1-4The output high level promptly starts BG ₁, BG ₂, through U ₂4 volts of power supplys are provided, produce sound signal, through BG ₃, BG ₄Amplify, drive loudspeaker, loud and clear alarm sound takes place.K ₂In case send the alarm switch signal, regardless of later state, warning will continue not stop, unless disconnect K ₁

The utlity model has following advantage:

Stable and reliable for performance, probe and electronic circuit are simple, do not have wrong report, fail to report, very high reliability is arranged, installation, easy to use, probe is integral with alarm apparatus, there is not any line with the external world, the same during use with normal shutter door, save electric energy, when reporting to the police less than 0.06mA when static less than 200mA, because adopt special piezoelectric ceramic sounder, even so little electric current also can send the grand sound.Cheap, this also is big characteristics of this warning device, and cost is about 1/4th of microwave, an alarm such as infrared, and simultaneously, this warning utensil has versatility, can be used for similarly on the device.

Below by Figure of description, a specific embodiment of the present utility model is done introduction.Detector switch K among the embodiment ₂Constitute by support 6, probe 7, spring 8, electrode 9 and screw 10, a side of U type support 6 fix by screw 10 two electrodes 9, the middle probe 7 that a band spring 8 is installed, probe an end can and two electrodes 9 between keep minim gap, the other end stretches out outside the support opposite side as probe, probe length that can be different according to the use occasion different choice.In the circuit of embodiment, U _1-1, U _1-2, U _1-3, U _1-4Be four nor gate integrated circuit CD4001, U ₂Be audio ic 9561, transistor BG ₁Be 3CG6, BG ₂, BG ₃Be 3DG12, BG ₄Be SD1C8847.Audio-frequency transformer (AFT) T is the boost type output transformer, power 1.5W.Loudspeaker can be with the powerful piezoelectric ceramic loudspeaker of 2.5 inch 1.2W.

Claims (1)

1, a kind of burglar alarm that is used for shutter door is made of detector 1, trigger circuit 2, electronic switching circuit 3, audible alarm circuit 4 and power-supplying circuit 5, it is characterized in that:

A, detector 1 are by search switch K ₂Form K ₂Constitute by support 6, probe 7, spring 8, electrode 9 and screw 10, side at U type support 6 is fixed two electrodes 9 by screw 10, one end of the middle probe 7 that a band spring 8 is installed, probe can and two electrodes 9 between keep minim gap, the other end stretches out outside the support opposite side as probe;

B, trigger circuit 2 are by integrated circuit U _1-1The reverser, the integrated circuit U that form _1-2U _1-3Schmidt trigger and the integrated circuit formed are barricaded as K ₂Insert the U in the Schmidt trigger _1-3Input end, the output of trigger is through reverser U _1-4Reverser three partial circuits of forming are barricaded as K ₂Insert the U in the Schmidt trigger _1-3Input end, the output of trigger is through reverser U _1-4Be input to BG ₁, BG ₂The input end of the electronic switching circuit 3 that is barricaded as, U ₂Insert BG ₁, BG ₂Output terminal become the load of electronic switching circuit 3, U _1-1, U _1-2, U _1-3, U _1-4Be four nor gate integrated circuit CD4001, transistor BG ₁Be 3CG ₆, BG ₂Be 3DG12;

C, audible alarm circuit 4 are by integrated circuit U ₂With transistor BG ₃, BG ₄And sound equipment frequency power transformer T, loudspeaker Y are barricaded as U ₂Output terminal directly promotes by BG ₃, BG ₄The power amplifier that is barricaded as, the tone currents after the amplification exports loudspeaker Y, U to through audio-frequency transformer (AFT) T ₂Be audio ic 9561, transistor BG ₃Be 3DG12, BG ₄Be SDIC8847;

D, power-supplying circuit 5 comprise battery E and K switch ₁Form battery E and K switch ₁Serial connection, wherein K ₁Be limit switch, can utilize the break-make of the change in location control power supply of dead bolt.

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