CN2099348U

CN2099348U - Contact type delay timing theft deterent alarm

Info

Publication number: CN2099348U
Application number: CN 91221304
Authority: CN
Inventors: 刘福东; 王峰; 刘世斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-18
Filing date: 1991-07-18
Publication date: 1992-03-18

Abstract

The utility model relates to a contact type delay timing alarm for civil use. The utility model is characterized in that a contact type monostable circuit and a starting up time delay circuit are added to an alarm circuit, which makes the alarm has the functions of time delay and arbitrarily regulating timing. So the alarm is more perfect and has the advantages of less malfunctions and convenient operation.

Description

Contact type delay timing theft deterent alarm

The utility model relates to a kind of electronic type warning device.

In the past, civil electronic formula alarm had short-circuit type, break type and touch and touch, and these exist easily produce misoperation, beamhouse operation process complexity more when pressing the attaching energize.The warning device majority does not possess time-delay, timing function in addition.

The purpose of this utility model is that a kind of installation energized of design is convenient, and time-delay, timing function are arranged, and is difficult for the touch time-delay timing burglar alarm of misoperation.

The realization of the utility model purpose is such: this alarm is made of touch monostable circuit warning circuit and start delay circuit.Touch monostable circuit is based on NE555 or similar device, the 1 end ground connection of NE555,2 ends connect to touch by capacitor C 1 holds A, 6,7 ends and connect after connect the positive pole of capacitor C 2, connect the end of R1 simultaneously, the negativing ending grounding of C2,4,8 ends and connect after connect the other end of R1, connect the end of R2 simultaneously, the negative pole of another termination power of R2, the end of 3 termination R3 and R4, the positive pole of another termination LED of R3, the positive pole of another termination capacitor C 3 of R4 connects the base stage of BG1 in the warning circuit, the minus earth of LED and C3 simultaneously.Said start delay circuit is formed complex pipe by BG3, BG4, the collector of BG3, BG4 also connects the negative pole of power supply, and the base stage of BG3 links to each other with the emitter of BG1, and the positive pole of the base stage of BG4 and capacitor C 5 and the end of R5 join, the negative pole of another termination power of R5, the other end ground connection of C5.

Accompanying drawing is an electric principle connection diagram of the present utility model.

Among the figure, the 1st, monostable circuit; The 2nd, warning circuit; The 3rd, the start delay circuit.R1 can select in 1K to 4M, and C1 can select between 0.1 to 0.47uF, and C2, C3, C5 can select in 10 to 100uF, and R2, R3, R4, R5 can select in 100 to 1M, and BG3, BG4 can adopt NPN transistor.

Principle of work of the present utility model is as follows:

The delay time of forming touch monostable circuit R1C2 decision monostable circuit by IC, monostable circuit is in transient state at ordinary times, and the IC13 pin is output as low level, and the compositing amplification tube that be made up of BG1, BG2 this moment is because of can not get not conducting of base stage bias current, IC2 does not just have operating voltage yet, and Y is sounding not.

As this moment, human body signal triggers the C1 left end, this signal will make the inner counter-rotating of IC1,3 pin output high level, and (this high level was only kept 12 seconds) path R3 makes LED luminous, the delay circuit (delay time is 12 seconds) that one path R4C3 forms makes BG1, BG2 conducting, make IC2 get electric work, the hybrid power of being made up of BG5, BG6 amplifies, and promotes Y with enough power and sends loud chimes of doom, since monostable circuit stable state 1 minute and 12 seconds, the transient state of promptly reversing back.So, stop automatically after IC2 only worked 1 minute reporting to the police to wait for triggering next time.

The time-delay start-up circuit of being made up of R5, C5 BG3 BG4 is when K is closed, supply voltage charges to C5 by R5, when the charging voltage on the C5 reaches the forward voltage of BG4, and BG4 BG5 conducting, with operating voltage such as the BG1 that feeds, BG2, IC2, carry out the above-described course of work.

If not conducting of BG3, even 3 pin of IC1 output high level, IC2 does not work yet, at this moment the false alarm that is caused by own touch when locking a door.

More than all time-delay, timing alarm time all adjustable arbitrarily.

During use, place an internal fixation good this alarm, will touch lead, be fixed on the metal part of locking, it is preceding with the K closure to go out, locking the door gets final product, cross 2 fens kinds after, if any people's lock of in 12 seconds, not opening, alarm equipment alarm is stopped newspaper automatically after 1 minute, opened lock in 12 seconds, turn off power switch K after entering, alarm is not reported to the police.

The utility model is because time-delay, timing is adjustable arbitrarily, and increases the start delay circuit and make alarm more perfect, convenient.

Claims

1, a kind of by touch monostable circuit, the touch time-delay that warning circuit and start delay circuit constitute is burglar alarm regularly, it is characterized in that touching monostable circuit is based on NE555 or similar device, the 1 end ground connection of NE555,2 ends connect to touch by capacitor C 1 holds A, 6,7 ends also connect the positive pole of capacitor C 2, connect the R1 other end simultaneously, the minus earth of C2,4,8 ends and connect after connect the other end of R1, connect the end of R2 simultaneously, the negative pole of another termination power of R2, the end of 3 termination R3 and R4, another termination LED positive pole of R3, the positive pole of another termination capacitor C 3 of R4, the base stage that connects BG1 in the warning circuit simultaneously, the minus earth of LED and C3.The complex pipe that said start delay circuit is made up of BG3, BG4, the collector of BG3, BG4 also connects the negative pole of power supply, the emitter of BG3 is connected with the collector of BG1, BG2, the base stage of BG3 links to each other with the emitter of BG4, the end of the positive pole of the base stage of BG4 and capacitor C 5 and R5 joins, the negative pole of another termination power of R5, the other end ground connection of C5.