CN2284427Y

CN2284427Y - Multifuncional anti-theft alarm

Info

Publication number: CN2284427Y
Application number: CN 96213483
Authority: CN
Inventors: 林义珠
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-06
Filing date: 1996-06-06
Publication date: 1998-06-17
Anticipated expiration: 2006-06-06

Abstract

The utility model relates to a multifunctional anti-theft alarm, which is suitable for anti-theft alarms for industries or civil use, composed of a reed pipe, a music integrated circuit IC, a power tube BG < 4 >, a horn Y and a bridge circuit which is composed of a resistor, a transistor, etc. Conducting wires and the reed pipe are used as alarm probes; when the conducting wires have a broken circuit or an open circuit, alarms can be triggered with reliable effect.

Description

Multi-function robbery protection alarm

A kind of multi-function robbery protection alarm is applicable to industry or civilian burglar alarm.

The similar alarm of selling on the existing market is mostly for unifunctional, as controlling alarm work with the break-make of switching device, function singleness; And adopting complicated computer control warning circuit, its cost is higher.

The purpose of this utility model provides a kind of multi-function robbery protection alarm with ball bearing made using, and this device all can cause warning when alarm probe broken string or short circuit.

Circuit formation of the present utility model comprises tongue tube JAG music integrated circuit IC, power tube BG ₄And loudspeaker Y, by resistance R ₁～R ₈, diode D ₁And triode BG ₁, BG ₂The input end of the bridge diagram of forming is connected to lead and the tongue tube JAG as alarm probe, its output terminal and triode BG ₃Base stage be connected BG ₃Collector meets music integrated circuit IC, and output audio signal is through power tube BG ₄Amplify the driving loudspeaker Y and send alerting signal.

Below will describe the circuit formation and the principle of work of this device in detail by accompanying drawing.

In the accompanying drawing, tongue tube JAG is an alarm probe, can be mounted on places such as door, window by thin wire, and magnet piece then is contained in corresponding position, by resistance R ₁～R ₈, diode D ₁And triode BG ₁, BG ₂The input end of the bridge diagram of forming meets JAG by lead.When JAG was closed, 2 current potentials of electric bridge A, B equated, triode BG ₁And BG ₂Base potential equate, bridge balance, alarm is on the alert; When JAG disconnected or pops one's head in the line disconnection, A point current potential raise, and B point current potential is constant, BG ₁Conducting, BG ₃Conducting makes light emitting diode D ₂Luminous, music integrated circuit IC work, loudspeaker Y sounding alarm.Because D ₁Effect makes BG ₁Base stage keeps suitable potential, makes BG ₃Closed again JAG or recovery probe line continue to keep conducting state, even also can not change state.Have only disconnecting power switch K, could remove alarm condition.

In addition, when connecting line during by short circuit, the about 0V of A point current potential, BG ₂Conducting makes BG ₃Also conducting, IC works equally, sounds the alarm.

Be reed pipe JAG and resistance R ₂The circuit two ends also are connected with lock-controlled switch K ' and resistance R ₂'.When tongue tube closure at closing time; K ' disconnection (state of alert) when locking, and when owner opened the door, tongue tube disconnected, K ' closure is removed warning simultaneously, has avoided owner to open the door and has caused the inconvenience of reporting to the police and being brought.

During actual installation, main frame can be placed in the room Anywhere easily according to concrete needs, and the connecting line of drawing is hundreds of rice, can intercept lead according to actual needs, and wire break or short circuit all can cause warning, and result of use is very reliable.

In the present embodiment, BG ₁, BG ₂Available triode 3DG ₆Or 9011 etc., BG ₃With 9012 or 3AX81 etc., BG ₄With 9013, D ₁Siren can be selected as required or music integrated circuit such as bark with diode 2AP9, IC.

Claims

1, a kind of multi-function robbery protection alarm, its circuit formation comprises tongue tube JAG, music integrated circuit IC, power tube BG ₄And loudspeaker Y, it is characterized in that: by resistance R ₁～R ₈, diode D ₁And triode BG ₁, BG ₂The input end of the bridge diagram of forming is connected to lead and the tongue tube JAG as alarm probe, its output terminal and triode BG ₃Base stage be connected BG ₃Collector meets music integrated circuit IC, and output audio signal is through power tube BG ₄Amplify the driving loudspeaker Y and send alerting signal.

2, multi-function robbery protection alarm according to claim 1 is characterized in that in tongue tube JAG and resistance R ₂The circuit two ends also are connected with lock-controlled switch K ' and resistance R ₂'.