CN2239477Y

CN2239477Y - Full automatic electronic anti-theft alarm

Info

Publication number: CN2239477Y
Application number: CN 96206089
Authority: CN
Inventors: 张太广
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-02
Filing date: 1996-04-02
Publication date: 1996-11-06
Anticipated expiration: 2006-04-02

Abstract

The utility model relates to a full automatic electronic anti-theft alarm which is composed of a buzzer, a control circuit, a battery, a shell body, a general switch, a door control switch, a control sheet, etc., wherein, the shell body is arranged on a door lock, the general switch is arranged on the top end of the shell body, and the control sheet is arranged on the top end of a lock tongue. The protruding part of the control sheet just faces to the general switch, and the door control switch is installed on a door frame adjacent to the clamped position of the lock tongue. The control sheet arranged on the lock tongue is used for controlling the on-off of the general switch. The opening and the closing of a door are used for controlling the on-off of the door control switch. The utility model has the advantages of simple and reasonable structure, simple and convenient installation, safety and low cost, which is suitable for being used for theft prevention and alarm for doors, windows, coiling gates, safety boxes, etc.

Description

The full-automatic electronic burglar alarm

The utility model relates to a kind of alarm, particularly a kind of full-automatic electronic burglar alarm.

In recent years the social lawless person of going up utilizes various means to go into the room and steals, and it is close more common to force open the door especially.Existing burglar alarm is many, but structure is all complicated, and difficulty is installed, and operates complicated.The patent No. is that 88215997.6 patent installs single-pole double-throw switch (SPDT) additional in lock, though Lock Factory easily accepts, has increased and has purchased new lock cost, will destroy the old lock of original user simultaneously, causes waste, and can cause and difficulty is installed and increases mounting cost.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and provides a kind of simple in structure, can utilize the convenient repacking of the former lock of haveing been friends in the past, lower-cost full-automatic electronic burglar alarm.

The purpose of this utility model can reach by following measure; The utility model comprises buzzer, control circuit, battery, housing, it is characterized in that; Master switch is loaded on the housing, and housing is loaded on the door lock, and control strip is loaded on the dead bolt top, and the control strip extension aligns master switch, and gate controlled switch is installed on the position that doorframe blocks near dead bolt.

The purpose of this utility model can also reach by following measure; 16 pin of IC 1 join in master switch and the control circuit, one end of gate controlled switch joins by resistance R 2 and the base stage of triode BG1, the other end joins by 1 pin of capacitor C 1 with IC 1,13 pin of IC1 are leaded up to 1 pin of resistance R 5 and IC2 and are joined, and another road joins by resistance R 6 and the base stage of triode BG2.This device also can be loaded in the strongbox.

Fig. 1 is a mounting structure schematic diagram of the present utility model;

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

Fig. 3 is loaded on mounting structure figure in the strongbox for the utility model.

The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1, the utility model is made up of buzzer 1, control circuit 2, battery 3, housing 4, master switch 5, gate controlled switch 6, control strip 7 etc.This device can be installed on the safe-guard door lock, and the user controls with the original door lock of switch, need not install other gauge tap additional.Master switch 5 is installed on the apical position of housing 4, and whole housing 4 is placed on the lock side position; Control strip 7 is housed on the dead bolt top, fixes with rivet or scolding tin, control strip 7 extensions are aimed at master switch 5.When unblanking, the dead bolt retraction is locked interior and is driven control strip 7 and pushes down master switch 5, and master switch 5 is disconnected; When shutting, dead bolt drives control strip 7 to protracting toward protracting, and leaves master switch 5, and master switch 5 is connected immediately.Gate controlled switch 6 is installed on the position that the angle bar doorframe blocks near dead bolt.When gate controlled switch at closing time 6 is pushed down by door limits and opened circuit; When opening the door, gate controlled switch 6 leaves the bruising on a limit again and connects.So when shutting up the door carefully, gate controlled switch 6 opens circuit, close again and lock, master switch 5 is connected, and enters on the alert.When if not method is forced open the door, gate controlled switch 6 instant paths and reporting to the police.

With reference to Fig. 2, control circuit 2 comprises a state sensing circuit, signal discrimination circuit, alarm signal generation circuit etc.The sensing circuit that is composed in parallel by gate controlled switch 6, capacitor C 1 links to each other with the signal input pin of IC 1; The alarm signal generation circuit that the signal discrimination circuit of being made up of IC1, resistance R 1～R3, capacitor C 1, C3 is made up of IC 2 and transformer B etc. by resistance R 5 is continuous.

During work, after the door of reporting to the police shut, gate controlled switch 6 disconnected, and locks theftproof lock, and master switch 5 is connected, and this signal makes IC1 enter the state of alert.This moment is if there is the people illegally to force open the door, door is pried open about 3mm, gate controlled switch 6 is promptly connected, produce signal and give IC1, after the signal discrimination circuit of compositions such as IC1 is differentiated, export a trigger impulse from 13 pin of IC1 and give IC2, the alarm signal generation circuit of being made up of IC2, transformer B etc. produces alarm signal, sends chimes of doom through buzzer 1.Conducting is reported to the police in case gate controlled switch 6 is triggered, and triggering signal still can continue conducting after disappearing, even again gate controlled switch 6 is pinned or control line is cut off, chimes of doom can not stop yet, leave no choice but owner and unblank, control strip 7 is pushed down master switch 5 and is opened circuit, and chimes of doom just can stop.

This device also has the electronic door bell function in addition, and after pressing AN, IC 3 obtains DC voltage, and the output signal of IC3 is behind transformer B, and buzzer promptly clangs.Triode BG2, relay J etc. are formed external circuit system, can external automatic dial-up circuit and BB machine beeper etc.

With reference to Fig. 3, this device also can be installed in places such as strongbox or security door volume lock, and the installation principle is identical, and different is the position difference of placing.

The utility model has following advantage compared to existing technology: simple and reasonable, the utmost point is installed For easily, the user can control by the original door lock of switch, need not install other controlling organization additional, Cost is lower. And safe and reliable, easy and simple to handle. Be suitable for the works such as door is close, volume lock, safety box Burglar alarm is used.

Claims

1, a kind of full-automatic electronic burglar alarm, comprise buzzer 1, control circuit 2, battery 3, housing 4, it is characterized in that: master switch 5 is loaded on the housing 4, housing 4 is loaded on the door lock, control strip 7 is loaded on the dead bolt top, control strip 7 extensions align master switch 5, and gate controlled switch 6 is installed on the position that doorframe blocks near dead bolt.

2, alarm according to claim 1, it is characterized in that: 16 pin of IC 1 join in master switch 5 and the control circuit 2, one end of gate controlled switch 6 joins by resistance R 2 and the base stage of triode BG1, the other end joins by 1 pin of capacitor C 1 with IC 1,13 pin of IC1 are leaded up to 1 pin of resistance R 5 and IC2 and are joined, and another road joins by resistance R 6 and the base stage of triode BG2.