CN2329047Y

CN2329047Y - Anti-theft alarm

Info

Publication number: CN2329047Y
Application number: CN 98232789
Authority: CN
Inventors: 宋西庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-15
Filing date: 1998-06-15
Publication date: 1999-07-14
Anticipated expiration: 2008-06-15

Abstract

The utility model discloses an anti-theft alarm. A microswitch 4 is installed between a door leaf 11 and a door frame 10; the microswitch is connected with an alarm lock 2 in series in a main circuit of a battery 9; a doorbell switch 1 and relays 6, 8 are connected with the main circuit in parallel. The utility model has the advantages of simple structure, low cost, reliable performance and high anti-damage performance; besides, the utility model can be installed by networking for multiple users and the utility model is suitable for the installation of places such as residential buildings, institution units, shops, storehouses, etc.

Description

Burglar alarm

The utility model relates to a kind of burglar alarm that is installed on door, the window.

For many years, the thing of burglary occurs repeatedly, and grows in intensity, and also gives birth to regard to application thereupon various burglar alarms.Useful infrared monitoring, useful magnetic or induction technology, also useful TV monitoring and controlling, some important places also have realizes purpose with high-tech means such as computer monitoring.Yet mostly complex structure, cost are not low, price is higher for these burglar alarms, and domestic consumer is not dared to inquire.Main is, and some warning device misoperation occurs easily and report to the police, and influences people's operate as normal and life.And these warning devices mostly are exclusively to install and use, and do not form the zone control.Also have, these anti-theft devices are disguised poor, and also easy stolen person destroys, thus burglary like a cork.

The utility model purpose is the deficiency that exists in the above-mentioned background technology for solving, and propose a kind of simple in structure, cost is lower, the service-strong burglar alarm.

Technical solution of the present utility model is achieved in that this alarm comprises a circuit box and battery, it mainly is that alarm lock, microswitch and alarm are connected with the battery main circuit successively, and relay, contact and hummer all are connected in parallel in the main circuit.Microswitch is installed between door leaf and the doorframe.The protecting crust of alarm lock, doorbell, alarm all is exposed to the outside of door leaf, and is fixed by backplate; Hummer is installed in the door leaf inboard with the circuit box of laying relay, contact and battery.Be circumscribed with the networking line at circuit box.

Fig. 1: circuit theory diagrams of the present utility model.

The partial circuit diagram of Fig. 2: Fig. 1.

Fig. 3: the structural representation in door leaf front.

Fig. 4: the structural representation of door leaf back.

Below in conjunction with accompanying drawing the utility model is done a detailed description.

Fig. 1, Fig. 2 show circuit structure of the present utility model.Alarm lock 2, microswitch 4 and alarm 5 are connected in the main circuit of battery 9, relay 6 and normally opened contact 3 are in parallel with main circuit, relay 8 and doorbell switch 1 also are connected in parallel in the main circuit, and hummer 7 and normally closed contact 14 are connected in parallel between battery 9 and the microswitch 4.As shown in Figure 3, microswitch 4 is installed between door leaf 11 and the doorframe 10, and the metal protection shell 16 of alarm 5, alarm lock 2 and doorbell switch 1 are by backplate 12 and the screw retention front at door leaf 11.As shown in Figure 4, hold the circuit box 15 of relay 6,8 and contact 3,14 and battery 9 and the back that hummer 7 is contained in door leaf 11.Also leading on circuit box 15 can be for the networking line 13 of a plurality of families or room networking installation.

When the householder goes out to lock behind the door, with key alarm lock 2 is opened again, make the main circuit conducting and in running order.Make door leaf 11 and doorframe 10 leave a bit small distance if there is stealer that any one side of door is pried open, at this moment, microswitch 4 promptly moves, and makes relay 6 charged and adhesive normally opened contact 3 guide alarm circuits, and alarm 5 and hummer 7 send alerting signal.At this moment microswitch 4 is the break-makes that open or close all uncontrollable alarm 5 and hummer 7, has only with key and just can close and recover normal.Because doorbell switch 1 and relay 8 do not pass through alarm lock 2, the lead-in wire between relay 8 and the normally closed contact 14 is to go up (referring to Fig. 2) the normal battle that is connected on relay 8, so when relay 6, alarm 5, hummer 7 work, relay 8 also is failure to actuate.Have only when pressing doorbell switch 1, power supply directly enters relay 8 and disconnects normally closed point, thereby plays the effect of individual event doorbell.

A plurality of users also can utilize the networking line 13 of drawing on the circuit box 15 to be installed in series, and when reporting to the police appearred in a family, the alarm at other each family was also reported to the police simultaneously, to form the situation that take precautions against in a zone.Because the protecting crust 16 and the backplate 12 of alarm are made for metal, can improve the ability that it resists destruction greatly, delay crime time.When line 13 is cut off if artificially will network, also can send alerting signal.

The utility model circuit design is reasonable, and is simple in structure, and cost is lower, be convenient to install, and dependable performance, anti-damage ability is strong, and the region security that is particularly suitable for places such as resident's building, institutional settings, shop, warehouse is taken precautions against.

Claims

1, a kind of burglar alarm, comprise battery (9) and circuit box (15), it is characterized in that alarm lock (2), microswitch (4) and alarm (5) connect with battery (9) main circuit successively, relay (6,8), contact (3,14) and hummer (7) all are connected in parallel in the main circuit.

2, burglar alarm as claimed in claim 1 is characterized in that said contact (3) for often opening, and said contact (14) are normally closed.

3, burglar alarm as claimed in claim 1 is characterized in that microswitch (4) is installed between door leaf (11) and the doorframe (10).

4, burglar alarm as claimed in claim 1 is characterized in that the protecting crust (16) of alarm lock (2), doorbell (1), alarm (5) all is exposed to door leaf (11) outside, and fixing by backplate (12); Hummer (7) and the circuit box (15) of laying relay (6,8), contact (3,14) and battery (9) are installed in door leaf (11) inboard.

5, as claim 1 or 4 described burglar alarms, it is characterized in that at the external networking line of circuit box (15) (13).