CN2254575Y

CN2254575Y - Anti theft alarming device

Info

Publication number: CN2254575Y
Application number: CN 95235327
Authority: CN
Inventors: 沈洪富
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-21
Filing date: 1995-12-21
Publication date: 1997-05-21
Anticipated expiration: 2005-12-21

Abstract

The utility model relates to a theft-proof alarm circuit which belongs to the technical field of electronic products and relates to a theft-proof alarm device. The utility model is characterized in that the theft-proof alarm device is composed of a host machine and a signal generating circuit which is connected with the host machine; the host machine is composed of an alarm circuit, a receiving circuit, an anti-vibration circuit and a doorbell control circuit. The utility model can be externally connected with a loudspeaker and can also be used for carrying out wireless talking back. The utility model has the advantages of high theft-proof performance, wide range and low cost; the theft-proof alarm device is suitable for shops, banks, families, etc.

Description

Burglar alarm

A kind of burglar alarm belongs to technical field of electronic products, relates to a kind of burglar alarm.

Existing burglar alarm mainly contains microwave and infrared warning device, and microwave alarm is subject to electromagnetic interference (EMI), causes wrong report easily, and existing infrared warning device, by transmitting probe, receiving transducer, receiving circuit, warning circuit is formed, its function singleness, and result of use is bad.

The purpose of this utility model provides a kind of multi-functional, result of use good, cost is low burglar alarm.

The purpose of this utility model is finished like this: it is made up of the signal generating circuit that main frame is connected with main frame, main frame comprises power circuit, receiving circuit, warning circuit, shockproof circuit and doorbell control circuit, wherein receiving circuit, shockproof circuit and doorbell control circuit are connected with external signal generation circuit by the respective socket on the main frame respectively.Power circuit is to each functional circuit power supply, and its circuit structure is: power supply is input to current rectifying and wave filtering circuit through transformer, exports after voltage stabilizing again, also available direct supply.Receiving circuit is made up of amplifying circuit and filtering circuit, is connected with warning circuit.Warning circuit is made up of voice integrated package, pre-amplification circuit, modulating emission circuit and amplifirer.Shockproof circuit is after shockproof signal is input to amplifying circuit, is input to warning circuit again.Doorbell control circuit is connected the voice integrated package and is launched voice signal by mu balanced circuit, oscillatory circuit and filtering circuit.

Fig. 1 is host circuit figure of the present utility model

Fig. 2 is an infrared signal generator circuit diagram of the present utility model

Describe in detail below in conjunction with accompanying drawing

1 is power circuit among the figure, and AC power is through transformer TB ₁Be input to by electric bridge and C ₂₈The current rectifying and wave filtering circuit of forming, T ₁₂, T ₁₃, D ₁₁Form mu balanced circuit, D ₂₇, D ₂₈Be polarity protection, J ₁Be AC-DC conversion relay, CK ₆Be the direct supply input, power circuit 1 is to each functional circuit power supply.2 is infrared signal generator circuit among the figure, by triode T ₂₀, T ₂₁Form oscillatory circuit, produce oscillator signal, launch infrared pulse signal to the infrared probe that links to each other with main frame by infrared diode.3 is receiving circuits among the figure, triode T ₁, T ₂Form amplifying circuit, D ₁, D ₂, D ₄The filtering circuit of forming, triode T ₃Be in conducting state, T ₄End relay J ₂, J ₃, J ₅Do not work, in case infrared ray is blocked the output of receiving circuit (3) pulse-free signal, then T by foreign object ₃End T ₄Conducting, relay J _3-1Connect C ₂₃Delay time, connect D ₁₂, and make C ₁₂The charging time-delay, T ₁₉Connect, illuminating lamp is bright, T ₁₅Conducting makes J _5-1Connect warning circuit (4), report to the police.Warning circuit (4) is by voice integrated package LC ₂, amplifirer LC ₁And pre-amplification circuit (7), FM reception transmitter (8) form, and signal is through LC ₂Be input to amplifirer LC ₁Be input to external loudspeaker after the amplification or be input to FM reception transmitter (8) and carry out wireless communication; Also can be input to FM reception transmitter (8), outwards carry out wireless transmit through pre-amplification circuit (7).Wherein, if switch is allocated to K _3-2-3, J _3-2Connect, can keep the relay self-locking.5 is shockproof circuit among the figure, and main frame has a vibrations input socket, and machine is outer can establish a vibration signal generator, behind the generation vibration signal, through R ₁₉, T ₁₆After, make J ₄Connect, start warning circuit (4) and send alerting signal.6 is doorbell control circuits among the figure, by switch CK ₆With by D ₅, C ₂₁, T ₁₈, C ₂₂Form filter circuit of pressure-stabilizing, integrated package LC ₁, T ₁₇, C ₂₀The doorbell oscillatory circuit of forming is formed, and signal enters oscillatory circuit behind filter circuit of pressure-stabilizing, make LC ₁The signal of sounding.

In order to make monitoring range of the present utility model bigger, can be equipped with the receiving circuit that is connected with warning circuit accordingly with many to infrared probe.

The utility model is simple in structure, and cost is low, and is multiple functional, is adapted to uses such as shop, bank, family.

Claims

1, a kind of burglar alarm is made up of the signal generating circuit that main frame is connected with main frame, it is characterized in that: main frame comprises power circuit (1), receiving circuit (3), warning circuit (4), shockproof circuit (5) and doorbell control circuit (6), receiving circuit (3) wherein, shockproof circuit (5) is connected with external signal generation circuit by the respective socket on the main frame respectively with doorbell control circuit (6), power circuit (1) is to each functional circuit power supply, its circuit structure is: power supply is input to current rectifying and wave filtering circuit through transformer, after voltage stabilizing, export again, also available direct supply, receiving circuit (3) is made up of amplifying circuit and filtering circuit, be connected with warning circuit, warning circuit (4) is by the voice integrated package, pre-amplification circuit (7), modulating emission circuit (8) and amplifirer are formed, shockproof circuit is after vibration signal is input to amplifying circuit, be input to warning circuit again, doorbell control circuit (6) is by mu balanced circuit, oscillatory circuit is connected the voice integrated package with filtering circuit and sends voice signal.

2, will be according to the described a kind of burglar alarm of claim 1, it is characterized in that: warning circuit (4) is by voice integrated package LC ₂, amplifirer LC ₁, pre-amplification circuit (7) and FM reception transmitter (8) form, signal is through LC ₂After amplifirer LC ₁Be input to external loudspeaker or be input to FM reception transmitter (8) and carry out wireless communication, also can be directly inputted to FM reception and send out device (8) and carry out radio transmission through pre-amplification circuit (7).

3, a kind of burglar alarm according to claim 1 is characterized in that: signal generating circuit is an infrared signal generation circuit.