CN2442331Y

CN2442331Y - Anti-theft alarm

Info

Publication number: CN2442331Y
Application number: CN 00221896
Authority: CN
Inventors: 江一泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-20
Filing date: 2000-09-20
Publication date: 2001-08-08
Anticipated expiration: 2010-09-20

Abstract

The utility model relates to a burglar alarm for door and window, it comprises alarm casing, alarm circuit, and a vibration switch of establishing ties on the alarm circuit, vibration switch can be spring switch, also can be mercury switch, have wireless installation, power consumptive little, prevent that the wrong report can not opened and the effect that can the high-sound warning by the vibration again at door and window.

Description

A kind of burglar alarm

The utility model relates to a kind of burglar alarm, especially the burglar alarm used of door and window.

The burglar alarm of Cun Zaiing has following several in the market: 1. infrared induction alarm, and this type of alarm can be responded to the infrared ray of human body, reports to the police and cause, and its shortcoming is that the interference that is subject to animal or radiowave often produces wrong report.2. magnetic separates induction alarm, this type of alarm must wait door, could induction alarm when window is opened.Therefore stolen property danger still exists, and fails to play the purpose of reporting to the police in advance before danger takes place.

The purpose of this utility model provides and a kind ofly is opened at Men Wei, can automatic high acoustic alarm during only by vibration, can prevent the burglar alarm of reporting by mistake again.

Solution of the present utility model is: a kind of burglar alarm, be made up of alarm box, warning circuit, piezo and power supply, wherein warning circuit is positioned at the warning box, connects a piezo on the warning circuit, and be provided with power supply, series connection one vibroswitch on the warning circuit.

Owing to adopted vibroswitch in the above-mentioned solution, when setting up defences place's ambient vibration, the automatic high acoustic alarm of alarm stopped after several seconds, and vibration source does not stop then to report to the police and do not stop, thereby reached the effect that the thief just reported to the police and intimidates the robber and notify owner to check before door and window etc. is opened in attempt.The wrong report of also having avoided simultaneously the interference because of toy or radiowave to cause, the utility model adopts wireless installation, and power consumption is little, and higher utility is arranged.

Below in conjunction with the drawings and specific embodiments to further detailed explanation of the utility model:

Fig. 1 is the utility model circuit theory diagrams.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is a upper shell front schematic view of the present utility model.

Fig. 4 is vibroswitch embodiment one of the present utility model.

Fig. 5 is vibroswitch embodiment two of the present utility model.

As Fig. 1,2, shown in 5, power supply 3 and triode 4, sounding IC2, triode 5 is in parallel respectively, and connection vibroswitch 1, regular tap 13, triode 4 and resistance 6, electric capacity 7 and resistance in series 8 are formed trigger delay part, sounding IC and resistance 9 resistance in seriess 10 in parallel, triode 5 is connected with boost inductance 11, and piezo 12 composes in parallel audible segment with the sense 11 of boosting, and when regular tap 13 disconnected, entire circuit was in off position, in any case vibration this moment, piezo 12 is sounding not all, and alarm is set to not alarm condition, when regular tap 13 is closed, alarm is set to alarm condition, when not being subjected to extraneous vibration, vibroswitch 1 disconnects, and entire circuit still is in off position, piezo 12 is sounding not, when being subjected to extraneous vibration, vibroswitch 1 closure, triode 4 conductings, use sounding IC2 to send audible signal, by boost inductance 11 amplifying signals, make piezo 12 send the loud sound, reach the warning purpose.

As shown in Figure 3, the upper shell first half is provided with the circular cavity of placing piezo 12 usefulness, and the upper shell Lower Half is for placing the small power supply case 18 of button power supply.As shown in Figure 2, place the circuit board that is fixed with alarm between upper and lower casing.As Fig. 2, shown in Figure 3, the upper and lower casing bottom surface also is provided with the threaded hole 20 that locking alarm box is used.

As shown in Figure 2, double coated film 19 is pasted on the box back side at the bottom of the housing, is used for fixing housing during use, also is provided with threaded hole 20 housing that locks on the housing.

As shown in Figure 4, vibroswitch is by a mercury piece 14, and iron wire 15 and iron wire 22 are formed.When not vibrating, mercury piece 14 does not contact with iron wire 15, and switch disconnects.When being subjected to vibrating, mercury piece 14 is vibrated and is moved up and down, and contact with iron wire 15, thereby make iron wire 15 and iron wire 22 conductings, switch closure, circuit is in running order, and piezo 12 is sent the sound.When extraneous vibration stopped, switch disconnected once more, and the time constant decision that the chimes of doom delay time is made of electric capacity 7 and resistance 6 discharge that beep sheet 12 stops sounding after several seconds, vibrates as goodbye and repeats as above process once more.

As shown in Figure 5, vibroswitch is that a little iron ball 16 and an iron plate 11 that connects spring 21 formed.During stationary state, little iron ball 16 does not contact with iron plate 17, when being subjected to vibrating, spring 21 is vibrated and is teetertottered, and little iron ball 16 is contacted, switch closure with iron plate 17, circuit is in running order, piezo 12 is sent the sound, and when extraneous vibration stopped, little iron ball 16 separated with iron plate 17, switch disconnects, the time constant decision that the chimes of doom delay time is made of electric capacity 7 and resistance 6 discharge that beep sheet 12 stops sounding after several seconds, vibrates as goodbye and repeats as above process once more.

Certainly vibroswitch is not limited to above-mentioned two kinds of modes, if there is other vibroswitch to be connected with warning circuit, also belongs to protection domain of the present utility model.

Claims

1. burglar alarm, mainly be made up of alarm box, warning circuit, wherein warning circuit is positioned at the warning box, connects a piezo (12) on the warning circuit, and be provided with power supply (3) and regular tap (13), it is characterized in that the vibroswitch (1) of also connecting on the warning circuit.

2. a kind of burglar alarm according to claim 1 is characterized in that the mercury cut-off of described vibroswitch (1) for being made up of iron wire (15), iron wire (22), mercury (14).

3. a kind of burglar alarm according to claim 1 is characterized in that described vibroswitch (1) is the little iron ball (16) of band spring (21) and the snap switch of iron plate (11) composition.

4. a kind of burglar alarm according to claim 1, it is characterized in that the alarm box body is made up of upper and lower casing, the upper shell first half is provided with the circular cavity of placing piezo (12) usefulness, and the upper shell Lower Half is for placing the small power supply case (18) of button cell.Place the circuit board that is fixed with warning circuit between upper and lower casing.

5. a kind of burglar alarm according to claim 4 is characterized in that the lower house back side is pasted with pressure sensitive adhesive double coated (19).

6. a kind of burglar alarm according to claim 4 is characterized in that the upper and lower casing bottom surface is provided with the threaded hole (20) that locking alarm box is used.