CN200959156Y

CN200959156Y - Safety device

Info

Publication number: CN200959156Y
Application number: CN 200620136686
Authority: CN
Inventors: 林松根
Original assignee: Kenshun Science & Technology Co Ltd
Current assignee: Kenshun Science & Technology Co Ltd
Priority date: 2006-09-21
Filing date: 2006-09-21
Publication date: 2007-10-10
Anticipated expiration: 2016-09-21

Abstract

The utility model discloses an anti theft device arranged in the electronic equipment in an embedded mode or other ways, and includes an alarm circuit and a self monitoring circuit. The siren of the alarm circuit is connected with a battery through at least one vibration switch. When the alarm circuit is activated and the electronic equipment is moved, the vibration switch will connect the siren with the battery and raise the alarm. On the other hand, the self monitoring circuit is consisted of a pilot lamp and a siren for test and is parellelly connected with the alarm circuit by a monitoring switch. If one wants to test whether the battery power is in good supply or the siren is normal, the monitoring switch can be pressed, then the battery power condition can be determined depending on the pilot lamp status and the siren condition based on whether the siren is activated simultaneously with the siren for test.

Description

Anti-theft device

Technical field

The utility model relates to warning device, specifically, is a kind of automatic antitheft device that is used for electronic product.

Background technology

Because the fast development of semiconductor technology, the related price of many electronic products that makes is minimized, thereby has relatively improved popularity rate.With LCD (LCD) is example, replace traditional cathode ray tube type (CRT) screen in recent years with surprising rapidity, the display terminal overwhelming majority of present most of personal computer the placing adopts LCD, and the use of cathode ray tube type screen is fewer and feweri, and this burst trend also begins in the dim moulding in domestic TV field.

From the above, aspect display, be main flow in the market with the LCD, other large-sized flat-panel screens also comprises plasma display panel, no matter being liquid crystal or plasma display panel, all is the electronic equipment that belongs to high unit price, and has dwindled merrily and lightheartedly many compared to traditional C RT screen on its volume weight, thereby, easily become the object of being committed theft showing or other occasion.So all above chain mode in displaying place of many liquid crystal/plasma display panels is stolen preventing, but this kind mode and can't preventing is skillful in the burglar that unblanks skill or adopt destruction absolutely, so utilize chain that the way that all displaying merchandises are held together obviously can't be produced active and effective antitheft purpose.

In addition, for other electronic products,,, moved, moved further easily, therefore, also become stolen object easily because of its weight is alleviating trend such as video camera, computer housing, DVR, DVD etc.

Summary of the invention

The purpose of this utility model is to solve the antitheft disadvantageous technical matters of above-mentioned electronic product, thereby a kind of novel anti-theft device is provided.

Anti-theft device of the present utility model comprises:

One circuit for alarming comprises a warning horn, and this warning horn is connected with a battery by at least one vibration switch;

One self-monitoring circuit comprises that a pilot lamp and a test use warning horn, and is parallel between described battery and the described circuit for alarming by a pilot switch;

One line unit, this unit is connected with described self-monitoring circuit for described circuit for alarming, and comprises at least one external interface;

This anti-theft device is installed on electronic equipment with embedded mode or alternate manner, in case electronic equipment is moved, promptly can touch vibration switch, and makes warning horn connect battery, by battery supplied electric power and produce alarm, thereby plays the effect of warning.

If whether test battery electric power is abundant, whether warning horn is normal, then can press the gauge tap in the self-monitoring circuit, make pilot lamp and test with the equal energized of warning horn, whereby, can judge whether electric power is abundant according to led status, whether move simultaneously with warning horn according to warning horn and test again, whether normal to judge warning horn.

In addition, aforementioned means can be connected with the governor circuit of electronic equipment internal by the external interface of line unit, and for example display etc. at this moment, can utilize its menu function (for example 0SD) to activate/to close anti-theft warning device.Alarm in also can finishing to activate by aforementioned menu.

Also be provided with a manual switch between warning horn in the aforementioned circuit for alarming and the vibration switch, be available for users to the loop between manual mode cut-out warning horn and the vibration switch, to close the alarm anti-theft feature.

Aforementioned vibration switch is a Roller switch.

Previous manual switch and pilot switch are a thumb-acting switch.

This anti-theft device further comprises a standby power supply circuit, and this standby power supply circuit includes:

One accumulator is in parallel with battery in the described circuit for alarming;

One charging circuit is connected with aforementioned accumulator;

One electronic switch, be connected between the warning horn and battery of circuit for alarming, it has a control end, can be connected to the governor circuit of electronic equipment, whether cut the loop so that control this accumulator/battery by electronic switch, with the activation on decision alarm set point road or close by governor circuit.

The aforementioned electronic switch is a MOS (metal-oxide-semiconductor) memory, and its source electrode is connected with the positive pole of accumulator, battery, grounded drain, and grid constitutes control end.

Anti-theft device of the present utility model, when electronic equipment is moved, its vibration switch can make warning horn connection battery rapidly and give the alarm, and its self-monitoring circuit can in time carry out fault detect to this anti-theft device, thus the generation of the behavior that can effectively avoid theft.

Description of drawings

Fig. 1 is the first preferred embodiment circuit diagram of the present utility model;

Fig. 2 is the partial circuit figure of another preferred embodiment of the utility model.

Embodiment

Be illustrated in figure 1 as a preferable enforcement circuit diagram of the present utility model, anti-theft device of the present utility model comprises a circuit for alarming 10, a self-monitoring circuit 20 and a line unit 30, wherein:

Circuit for alarming 10 comprises a warning horn 11, at least one vibration switch 12 and a battery 13, this warning horn 11 is connected with battery 13 by vibration switch 12, in the present embodiment, this vibration switch 12 is a Roller switch, when the electronic equipment that is connected with anti-theft device is moved, promptly cause the metal balls in the Roller switch to move, thereby the former electrode that is barrier-like is connected, reach the purpose of mobile detection; In the present embodiment, warning horn 11 is a hummer, and 13 on battery is a disposable battery; In addition, for providing the user with manual mode switch alarm function, be provided with a manual switch 14 between this warning horn 11 and the vibration switch 12, this hand switch 14 can be a thumb-acting switch, and utilize the loop between hand switch 14 decision warning horns 11 and the vibration switch 12 whether to connect, and then whether activate with manual mode control alarm function.

Self-monitoring circuit 20 comprises a pilot lamp 21 and a test warning horn 22, and it is in parallel with aforementioned circuit for alarming by a pilot switch 23, line unit 30; In the present embodiment, this pilot lamp 21 is a double-colored light emitting diode, and it can produce different coloured light because of input voltage is different, and whether thus, it is sufficient to distinguish battery 13 electric power for the user; Pilot switch 23 can be made of a thumb-acting switch.

Line unit 30 comprises interconnective interface J1, J2, and be connected with circuit for alarming 10 and self-monitoring circuit 20 respectively, wherein interface J1 pin is connected in battery 13 negative poles, another pin then is connected with battery 13 positive poles by hand switch 14, vibration switch 12, this interface J1, J2 can interconnect, and pilot lamp 21 in the self-monitoring circuit 20 and test are in parallel with warning horn 22 and warning horn 11.Interface J1 can be connected with the governor circuit of electronic equipment internal, with the display is example, when interface J1 with after its inner governor circuit is connected, can be by a default menu formula (for example OSD, On Screen Display) by the keying (can access to your password) of control circuit for alarming 10 on the picture of display, warning time etc.

Because aforementioned anti-theft device is to be installed on the electronic equipment with embedded mode or other modes, in case electronic equipment is moved, vibration switch 12 will be touched and closure, this moment, warning horn 11 promptly constituted the loop with battery 13, and by battery 13 supply electric power and produce alarm, hinder the ruffian so as to frightening, and notify the related personnel to come to handle.

Self-monitoring circuit 20 is in order to test battery 13 electric power abundance and warning horn 11 fault whether whether, when it carries out test, press the pilot switch 23 in the self-monitoring circuit 20, rock electronic equipment again and make vibration switch 12 conductings, make pilot lamp 21 and test warning horn 22 equal energized, because pilot lamp 21 is made of dichromatic LED, it can produce different color light because of electric power is strong and weak, the user can judge whether battery 13 electric power are still sufficient according to different color light then, whether decision must change battery again, use warning horn 22 whether by the while start according to warning horn 11 and test again, whether normal to judge warning horn 11, as have only test to make a sound with warning horn 22, show that promptly warning horn 11 has damaged, then can change, to keep the normal execution of alarm function.

As shown in Figure 2, be the another preferred embodiment of the utility model, it increases by a standby power supply circuit 40 under the basic framework of previous embodiment, and this standby power supply circuit 40 includes:

One accumulator 41 is in parallel with battery 13 in the circuit for alarming 10;

One charging circuit 42, it adopts existing ripe charging circuit, and particularly, charging circuit 42 is connected between an aforementioned accumulator 41 and the direct current power supply VIN, so that utilize this direct supply VIN that accumulator 41 is charged, provides standby power supply by this accumulator 41 again; This charging circuit 42 mainly comprise a charge controller U1 (AIC1783), be controlled by charge controller U1 and be connected in direct supply VIN and accumulator 41 between transistor Q1 and other perimeter component, this charge controller U1 be the break-make decision accumulator 41 by oxide-semiconductor control transistors Q1 charging whether;

One electronic switch 43, in the present embodiment, be that a metal oxide field-effect transistor CMOS constitutes, its source electrode is connected by the positive terminal of resistance R 11 with battery 13, this source electrode is connected with accumulator 41 positive terminals of charging circuit 42 by a switch SW 1 in addition, whether its grid then constitutes a control end, can be powered by its control accumulator 41, battery 13 for the governor circuit that is connected in the electronic equipment.When governor circuit output one-5V pulse wave, when metal-oxide half field effect transistor CMOS ended, this moment, the accumulator 41 in the expression charging circuit 42 was cut off the electric power loop of circuit for alarming 10 if switch SW 1 is opened a way, and system is by battery 13 power supplies at this moment.When if battery 13 power shortages must be upgraded, can earlier switch SW 1 be transmitted closed circuitly, make the electric power loop of the accumulator 41 incision circuit for alarming 10 in the charging circuit 42, required electric power when producing alarms by its supply warning horn 11 is with changing battery 13 this moment.

Otherwise, when closing alarm function as if the user, then metal-oxide half field effect transistor CMOS conducting, and make battery 13 and accumulator 41 all cut off electric power loop, thus alarm function also is closed.

From the above, anti-theft device of the present utility model mainly is to be installed on electronic equipments such as display, host computer, video camera, DVR, DVD with embedded mode or alternate manner, in case electronic equipment is moved, promptly can touch vibration switch, and make warning horn connect battery, produce alarm by battery supplied electric power, can produce the positive resistance prevention effect that frightens whereby; Other cooperates self-monitoring circuit and standby power supply circuit, and initiatively whether monitor component damages, whether function normal, and accessory power supply is provided, so that still can normal operation when battery electric power is not enough.

Claims

1, a kind of anti-theft device is characterized in that, this anti-theft device comprises:

One line unit, this unit is connected with described self-monitoring circuit for described circuit for alarming, comprises at least one external interface.

2, anti-theft device as claimed in claim 1 is characterized in that, is provided with a manual switch between described warning horn in the described circuit for alarming and the described vibration switch.

3, anti-theft device as claimed in claim 1 or 2 is characterized in that, described vibration switch is a Roller switch.

4, anti-theft device as claimed in claim 2 is characterized in that, described hand switch and pilot switch are thumb-acting switch.

5, anti-theft device as claimed in claim 1 is characterized in that, described circuit for alarming further is connected with a standby power supply circuit, and this standby power supply circuit comprises:

One charging circuit is connected with described accumulator;

One electronic switch is connected between the warning horn and battery of described circuit for alarming, and has a control end.

6, anti-theft device as claimed in claim 5 is characterized in that, described electronic switch is a MOS (metal-oxide-semiconductor) memory, and its source electrode is connected with the positive pole of accumulator, battery, its grounded drain, and its grid constitutes control end.

As claim 5 or 6 described anti-theft devices, it is characterized in that 7, described electronic switch is connected with the positive terminal of accumulator in the charging circuit by a switch.