CN201060519Y - Power-off anti-theft alarm - Google Patents

Abstract

The utility model discloses a power-off burglar alarm, which comprises a dry battery and an alarm bell to form an alarm circuit, wherein a normally closed contact of a relay is connected in series in a power supply loop of the relay, a bolt is connected with alternating current, the alternating current is changed into 6V through the bolt and the output voltage of a transformer, and a circuit behind the transformer is connected in series with switches in multiple places; when the door is closed, the switch is in a closed state, and the relay contact is in a normally open state. When the direct current power supply of the alarm bell is switched on, the alarm bell works to sound, and the alarm is prompted. The utility model discloses simple structure, low cost, the low price. The selling objects are mainly rural areas, farmers, urban residents, temporary construction sites, warehouses and the like, and as long as the multifunctional power-off alarm is installed, a thief can hear the alarm immediately in bedrooms as long as the thief opens a door for stealing, so that the multi-place anti-theft alarm function is realized.

Description

The outage burglar alarm

Technical field

The utility model is that particularly a kind of outage burglar alarm belongs to the electronic alarm device technical field to the improvement of existing alarm.

Background technology

The power-off alarm of Chu Shouing in the market, the quantity kind is a lot.Their advantage is also a lot.As Cangzhou City " the four defence area wireless infrared anti-theft alarm devices " that magnificent electronics corporation produces that shake, four or five functions are arranged, infra-red detection, lighting during warning has the orientation to show two kinds of alarm sounds.The infra-red detection scope, 7～15 meters of distances, 500～1000 meters of reception and transmission ranges or the like.But its weak point is on the high side, and between 100～200 yuan, the masses are reluctant to accept.From function aspects, only within place's scope.

The utility model content

The utility model discloses a kind of outage burglar alarm, purpose is intended to solve rural area and building, cities and towns inner cable, transformer, livestock, warehouse, the frequent stolen problem of indoor money and goods.

Technical solution of the present utility model is as follows: by dry cell, constitute warning circuit by emergency alarm bell, the normally closed contact of relay is connected in its electric power loop, latch connects the 220V alternating current, and the 220V alternating current is connected in series with the pilot switch in place, many places through latch, transformer output voltage, and usual pilot switch is in closure state, during normal power supply, relay contact is in normally open, and when relay opened circuit, the contact was in normally off, the emergency alarm bell circuit turn-on, the emergency alarm bell ring is reported to the police.

Pilot switch of the present utility model can be arranged on the different location, many places simultaneously, and emergency alarm bell is installed in indoor, realizes anti-theft alarm function, as: (1) alarm cable, transformer is stolen; (2) the alarm livestock is stolen; (3) the alarm warehouse is stolen; (4) alarm another room, place of oneself in Stall is stolen; (5) alarm is stolen every another place's dwelling house of little road.

Good effect of the present utility model is: alarm is simple in structure, and is with low cost, low price.The subject of a sale mainly is rural area, peasant, town dweller and interim building site, warehouse etc., as long as set up multi-functional power-off alarm, the theft as long as the thief opens the door just can be heard warning in the forces in the bedroom, has realized many places anti-theft alarm function.

Description of drawings

Fig. 1 is that the utility model is provided with synoptic diagram;

Fig. 2 is the utility model circuit theory diagrams.

Specific implementation method

In conjunction with the accompanying drawings the utility model is further described.As shown in Figure 2, setting with 3V dry cell E be power supply, the warning circuit that constitutes by emergency alarm bell B, normally closed contact P1, the P2 of relay J and P3 are connected in its electric power loop, latch C connects the 220V alternating current, the 220V alternating current becomes 6V through latch C, transformer T output voltage, the L circuit behind the transformer T and dwelling house door switch K1, warehouse gate K switch 2, livestock circle door switch K3, with building interlayer oneself elsewhere dwelling house door switch K4, every little road oneself elsewhere dwelling house door switch K5 be connected in series (with reference to Fig. 1); When door was closed, above-mentioned switch was a closure state.

When the need monitoring, alarming, alarm switch K6 closure, the relay J coil gets electric, and relay normally closed contact P1, P2 and P3 are in normally open and open, and warning circuit drops on the alert.In case arbitrary door is opened on the L circuit series circuit behind the transformer T, door switch is opened, the relay J outage, and relay J coil losing electricity, relay J normally closed contact P1, P2 and P3 transfer to connect, and warning circuit sends news immediately and rings.At this moment, opening K switch 6 can stop to report to the police.

When not needing monitoring, alarming, open K switch 6 and stop to report to the police.

Claims (1)

1. outage burglar alarm, by dry cell, constitute warning circuit by emergency alarm bell, it is characterized in that: the normally closed contact of relay is connected in its electric power loop, and latch connects the 220V alternating current, and the 220V alternating current is connected in series with the pilot switch in place, many places through latch, transformer output voltage.

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