CN2045866U

CN2045866U - Anti-stealing warner

Info

Publication number: CN2045866U
Application number: CN 88213736
Authority: CN
Inventors: 张家杰; 娄保强; 张蓉九
Original assignee: 宋一普
Priority date: 1988-09-01
Filing date: 1988-09-01
Publication date: 1989-10-11

Abstract

The utility model relates to an electronic alarm, which is an anti-theft alarm. The electronic alarm is composed of a host machine and an exterior input device. The host machine is composed of a code control circuit, a distinguish circuit, a trigger circuit, an alarm generator circuit, and a delay circuit. The exterior input device is composed of a code input device, a trigger input device, and a net drawing input device. The anti-theft alarm of the utility model is a perfect anti-theft equipment which is used for unmanned on duty unit, small unit, sales department, government office, exchequer of the school, and family.

Description

Anti-stealing warner

The utility model relates to a kind of electronic alarm device, i.e. burglar alarm.

The burglar alarm kind of selling on the existing market, society uses is a lot, have mechanical, also electronic type arranged.Relate to electronic type, have contact to report to the police, also have and utilize radio to report to the police, these alarms differ from one another.The purpose of this utility model is to provide the burglar alarm of other tool characteristic, for burglar alarm family increases a new member.The utility model adopts direct current supply, i.e. dry cell power supply, and this mainly is in order to prevent that the robber from cutting off the electricity supply.Electric current on duty of the present utility model is very little, only about 20 microamperes, realizes computer control with password, has two kinds of functions of door switch and window block, is unattended unit, subsection, retail department, office, accounting office of school and home-use desirable burglary-resisting installation.The utility model is reasonable in design, multiple functional, easy for installation, cheap, thereby it is bound to be subjected to users' welcome.

The utility model is made of main frame and external input device, external input device by cipher input, trigger input media, the block input media is constituted, external input device is mainly finished the input (being three kinds of code signals, trigger pip, block signal) of signal.Main frame is then by the Crypto Control Unit (it links to each other with cipher input) of recognition code signal, to code signal, trigger pip, (it respectively and Crypto Control Unit for the judging circuit that block signal three kinds of signals are differentiated, trigger controller, trigger input media, the block input media links to each other), trigger circuit (link to each other with judging circuit, trigger by judging circuit output judgment signal), the alarm generator circuit (links to each other with trigger circuit, whether whether the output signal decision reports to the police by trigger circuit), delay circuit (linking to each other with trigger circuit, with the length of decision time of fire alarming) is constituted.

Accompanying drawing 1 is a functional-block diagram of the present utility model.

Accompanying drawing 2 is electrical schematic diagrams of the present utility model.

Below in conjunction with accompanying drawing the utility model is further elaborated.

In Fig. 1, Fig. 2, A is a cipher input, and it can be 4 keyswitches, i.e. K ₁, K ₂, K ₃, K ₄, K here ₄Usefulness not, K ₂Be " 0 " key (K clearly ₁, K ₂, K ₃, K ₄When mounted, can be inverted arbitrarily).B triggers input media, and it is actually a normally opened contact or normal open switch, when its is closed, and to high level signal of judging circuit input, i.e. alerting signal, (among Fig. 2) is decorated with two switches, K here ₅Be operating switch, connect the back alarm work, K ₆Be the switch that is placed on behind the door, as long as Men Yikai promptly connects K ₆But several switch in parallel switch (whenever lay behind the door, can control multi-door) together.B is the block input media, and it is a normally closed contact or normally closed switch, and it can be the electric wire of a closure, the electric wire hurdle is on window, under normal conditions, input judging circuit voltage is lower, as long as electric wire one is disconnected, promptly import a high level signal to judging circuit, be alerting signal, the control window can be a plurality of, and triggering input media, hurdle net are failed as device all can contain plug, socket, so that link to each other with main frame, can certainly directly link to each other.In the drawings, the 1st, cipher control circuit, it can be two decimal counters, i.e. two decimal counters of D, E, K ₁Send count signal to D, K ₃Send count signal to E, by D ₁～D ₇, D ₉～D ₁₁And E ₁～E ₇, E ₉～E ₁₁The signal (high level) of sending two 0～9 has only by password to judging circuit, presses K ₁, K ₃, key, could be at the respective input of two decimal counters (D, E) output high level signal, otherwise be output as low level signal, then can cause warning, C ₁～C ₃, R ₁～R ₃For peripheral electric capacity, resistance, as embodiment, D, E decimal counter can select the CD4017 integrated circuit.The 2nd, judging circuit, it can be the not circuit of four both-ends input, and it can be integrated circuit CD4011 as embodiment, and password input signal (being come by two decimal counter D, E) is passed to G ₁₂, G ₁₃By G ₁₁Output, this signal is as D, when E is high level signal, G ₁₁Be output as " 0 ", be non-alarm signal this moment.D, E have one to be low level signal, G ₁₁Be output as " 1 ", i.e. high level G, then this signal is the pre-alarm signal.Trigger input signal by G ₁, G ₂Input, G ₃Output; The block input signal is by G ₅, G ₆Input, G ₄Output; G ₃, G ₄Be input to G again ₈, G ₉, again by G ₁₀Output, as long as trigger input signal, the block input signal has one to be high level signal, then G ₁₀Be output as high level signal to trigger circuit, this high level signal is an alerting signal.3 is trigger circuit, and it is a double D trigger E, and we select model C D4013 for use embodiment, as the G that differentiates G ₁₁Come high level signal (pre-alarm signal), be input to F ₉, double D trigger F is in pre-alarm state, as long as G ₁₀Be input to F again ₁₁One high flat signal (alerting signal), the F of at this moment two D output trigger F ₁₃End output one trigger pip (high level) is passed through R ₁₇, trigger BG ₁, make BG ₁Conducting is powered to acoustics circuit.4 are the generation circuit of reporting to the police, and it is by acoustics circuit H, amplifier transistor BG ₂, audio-frequency transformer (AFT) T.Capacitor C ₁₀, loudspeaker Y D constitutes, as long as BG ₁One conducting is then by stabilivolt D ₃Supply with alarm generation circuit one burning voltage, promptly report to the police.5 is delay circuit, and it is by C ₈, R ₁₁Form, the time that major control is reported to the police, work as F ₁₃The end output level triggers BG ₁Simultaneously, pass through R ₁₁Give capacitor C ₈Charging is when passing through R ₁₁C ₈Time (being generally 5～10 minutes), C ₈Be noble potential, pass through F ₆Make the d type flip flop upset, trigger BG ₁Stop, making double D trigger F get back to virgin state simultaneously, wait for alerting signal input next time.Principle of work of the present utility model is as follows: when the burglar presses not to password, two decimal counter D, E low levels of output or two low level signals are to judging circuit G, then G exports a high level signal to trigger circuit F, this moment is as long as he forces open the door, then trigger pip is " 1 " (alerting signal), if broken window is gone into, the signal of then blocking is " 1 " (alerting signal), judging circuit G is input to trigger circuit F one high level signal (" 1 " is signal) again, and this moment, trigger circuit F then exported a trigger pip (high level " 1 ") triggering transistor BG ₁, make BG ₁By, the alarm generator circuit working is reported to the police, in this simultaneously, the high level of trigger circuit F is given C again ₈Charging is when being charged to C ₈R ₁₁Time, C ₈Be in noble potential, make the trigger circuit upset, return to original state, wait for next time and reporting to the police.

As embodiment, acoustics circuit can be KD9561, transistor BG ₁, BG ₂Be General N PN pipe, model can be any.

Use the utility model that several big benefits are arranged:

1. once report to the police, no matter how the wiring to the outside destroys, because the host work state is constant, does not all make its stop alarm.

2. if by not to password, only otherwise enter or window, all do not report to the police, can prevent wrong report (coming or child comes etc.) like this as the stranger.

3.,, still equally report to the police as long as enter or go into window if cipher input outdoors is destroyed.

Claims

1, a kind of burglar alarm, power by direct supply (dry cell), it is characterized in that: this alarm is made of main frame and external input device two parts, external input device is by cipher input A, trigger input media B, block input media C constitutes, main frame is then by the Crypto Control Unit 1 (A links to each other with cipher input) of recognition code, to code signal, trigger pip, the judging circuit 2 that the block signal is differentiated is (respectively with cipher control circuit 1, triggering input media B block input media C links to each other), and trigger circuit 3 (linking to each other) with judging circuit, alerting signal generation circuit 4 (links to each other with trigger circuit 3, trigger warning by trigger circuit 3), delay circuit 5 (link to each other with trigger circuit, control its triggered time) constitutes.

2, a kind of burglar alarm as claimed in claim 1 is characterized in that input media A is by K switch ₁, K ₂, K ₃, K ₄Constitute, they can be keyswitches, triggering input media B is a normally opened contact, can be by plug, socket and K switch ₅, K ₆Constitute, block input media C is a normally closed contact, can be made of plug, socket and block electric wire.

3, a kind of burglar alarm as claimed in claim 1 is characterized in that the Crypto Control Unit 1 of recognition code is constituted by two decimal counters.

4, a kind of burglar alarm as claimed in claim 1, its feature is constituted in the Sheffer stroke gate of judging circuit 2 by four both-end inputs.

5, a kind of anti-theft alarm device as claimed in claim 1 is characterized in that trigger circuit 3 are by two d type flip flops and resistance R ₁₇, transistor BG ₁, voltage stabilizing diode D ₃, capacitor C ₉Constitute.

6, a kind of burglar alarm as claimed in claim 1 is characterized in that delay circuit 5 is by R ₁₁, C ₈The RC circuit of being formed constitutes.

7, a kind of burglar alarm as claimed in claim 1 is characterized in that alarm generator circuit 4 has by acoustics circuit H, audio frequency amplifier transistor BG ₂, and audio-frequency transformer (AFT) T, loudspeaker Y D constitute.