CN204515959U - A kind of burglary prevention of laptop warning device - Google Patents
A kind of burglary prevention of laptop warning device Download PDFInfo
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- CN204515959U CN204515959U CN201520258382.8U CN201520258382U CN204515959U CN 204515959 U CN204515959 U CN 204515959U CN 201520258382 U CN201520258382 U CN 201520258382U CN 204515959 U CN204515959 U CN 204515959U
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Abstract
The utility model discloses a kind of burglary prevention of laptop warning device, belong to burglary prevention of laptop technical field.The utility model comprises Detection electrode, capacitive approach switch, astable multivibrator power supply, astable multivibrator and alarming horn BL; Described Detection electrode is connected with the input end of capacitive approach switch, and this capacitive approach switch is electrically connected with astable multivibrator by astable multivibrator power supply, and the output terminal of described astable multivibrator is connected with alarming horn BL.As long as the utility model notebook computer is moved, the oscillatory circuit of capacitive approach switch will starting of oscillation, and then trigger alarm circuit working, sends alerting signal, reaches antitheft object; Be arranged on the scheme on notebook computer fuselage compared to traditional anti-theft starting switch, burglar alarm of the present utility model is not easily found by thief, thus avoids the situation that burglar alarm removed by thief, and anti-theft effect is better.
Description
Technical field
The utility model relates to burglary prevention of laptop technical field, more particularly, relates to a kind of burglary prevention of laptop warning device.
Background technology
Notebook computer is because compact, and the advantage such as to be easy to carry is liked deeply by people and favors, and people such as conveniently to go on business at the mobile environment for use, usually select notebook computer.But, exactly because the feature of also notebook computer compact, the object causing it to become thief stealing.The anti-theft technique of current desktop computer is relatively ripe, because desktop computer position is fixed, anti-theft device designs well, installs, warning starting switch can be arranged on concealed location, and it is relatively blank for the anti-theft technique of notebook, substantially be all that some theftproof locks are set, the burglar alarm technology of desktop computer can not be applied mechanically.And because the position of notebook computer is not fixed, warning starting switch can only be arranged on the fuselage of notebook, but easily like this to be found by thief, thus easily remove warning device.
Through retrieval, China Patent No. ZL 201320826490.1, authorized announcement date is on June 18th, 2014, invention and created name is: theft alarm for notebook computer, this application case is made up of the loudspeaker be fixed in shell, controller and vibration sensor, and vibration sensor is electrically connected with loudspeaker by controller; Vibration sensor is provided with the housing of mercury bead by inside, at least two pairs of electrodes be fixed in this housing are formed.This application case aims to provide a kind of alarm that can send acoustic alarm signal when cutting off or moving notebook computer, but this application case alarm is connected with notebook computer by transmission line, thief is very easy to find, thus left the chance that thief manages to remove alarm for, still there is the risk that notebook computer is stolen.
China Patent No. ZL201420135534.0, authorized announcement date is on July 30th, 2014, and invention and created name is: burglary prevention of laptop alarm; This application case comprises mercury cut-off K1, switching signal radiating circuit, switching signal receiving circuit, inclination trigger circuit, astable multivibrator and alarming horn BL; Arrange a pair normally opened contact in mercury cut-off K1, mercury cut-off K1 tilt signals output terminal is connected with inclination trigger circuit tilt signals input end; The warning trigger pip output terminal of inclination trigger circuit is connected with the warning trigger pip input end of astable multivibrator; The alarm command output terminal of astable multivibrator is connected with the Enable Pin of alarming horn BL; Switching signal radiating circuit sends warning function switch order, and switching signal receiving circuit receives this warning function switch order; The warning function switch order output terminal of switching signal receiving circuit is connected with the warning function switch order control end of inclination trigger circuit.The antitheft starting switch of this application case is not arranged on the fuselage of notebook, and thief not easily finds; But the circuit structure of this application case is still more complicated, and reaction sensitivity also has much room for improvement, still need further improvement.
Summary of the invention
1. the utility model technical matters that will solve
It is easily stolen that the purpose of this utility model is to solve notebook computer, brings the problem of economic loss, provide a kind of burglary prevention of laptop warning device to user; The utility model is using Detection electrode, notebook computer as the two poles of the earth of electric capacity, this Detection electrode is connected with capacitive approach switch, as long as notebook computer is moved, the oscillatory circuit of capacitive approach switch will starting of oscillation, and then trigger alarm circuit working, send alerting signal, reach antitheft object; Be arranged on the scheme on notebook computer fuselage compared to traditional anti-theft starting switch, burglar alarm of the present utility model is not easily found by thief, thus avoids the situation that burglar alarm removed by thief, and anti-theft effect is better.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
A kind of burglary prevention of laptop warning device of the present utility model, comprises Detection electrode, capacitive approach switch, astable multivibrator power supply, astable multivibrator and alarming horn BL; Described Detection electrode is connected with the input end of capacitive approach switch, and this capacitive approach switch is electrically connected with astable multivibrator by astable multivibrator power supply, and the output terminal of described astable multivibrator is connected with alarming horn BL.
Further, described capacitive approach switch comprises triode VT1, VT2, tunable capacitor C0, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3, diode VD1, VD2, VD3, inductance L 1, relay K, switch S and direct supply; Wherein, the collector of triode VT1 is connected with Detection electrode;
The base stage of triode VT1 separates two-way, one tunnel is connected with the emitter of triode VT2 through electric capacity C1, another road is connected with one end of inductance L 1, one end of electric capacity C4, one end of electric capacity C5, one end of switch S respectively through resistance R1, the other end of inductance L 1 is connected with the collector of triode VT1, described tunable capacitor C0 is parallel between the collector and emitter of triode VT1, the equal ground connection of the other end of electric capacity C4, electric capacity C5; The other end of switch S connects direct supply, and this direct supply is also for relay K is powered, and one end of relay K is connected with the collector of triode VT2, and the two ends of this relay K are parallel with diode VD3;
The emitter of triode VT1 separates two-way, one tunnel is connected with the emitter of triode VT2 through resistance R2, another road is connected with the positive pole of diode VD1, the negative pole of diode VD2 respectively through electric capacity C2, the negative pole of diode VD1 is connected with one end of resistance R3, one end of electric capacity C3 respectively, the base stage of another termination triode VT2 of resistance R3, the positive pole of diode VD2, the other end of electric capacity C3 are all connected with the emitter of triode VT2.
Further, the capacity of described tunable capacitor C0 is 3 ~ 25pF.
Further, described astable multivibrator comprises time-base integrated circuit IC1, resistance R4, R5, electric capacity C6, C7 and electrolysis constant volume C8; Described astable multivibrator power supply DC is connected with the 8th pin with the 4th pin of time-base integrated circuit IC1 respectively, and this astable multivibrator power supply is also connected with the 7th pin of time-base integrated circuit IC1 by resistance R4; The 7th described pin is connected with the 6th pin with the 2nd pin of time-base integrated circuit IC1 by resistance R5, and the 3rd pin of time-base integrated circuit IC1 is connected with the positive pole of electrolysis constant volume C8, and the negative pole of electrolysis constant volume C8 connects the positive pole of alarming horn BL; 2nd pin of time-base integrated circuit IC1 is then all connected with the negative pole of alarming horn BL by the 1st pin of electric capacity C7, time-base integrated circuit IC1 with the 5th pin of the 6th pin by electric capacity C6, time-base integrated circuit IC1.
3. beneficial effect
The technical scheme adopting the utility model to provide, compared with existing known technology, has following beneficial effect:
(1) a kind of burglary prevention of laptop warning device of the present utility model, by Detection electrode, notebook computer is respectively as the two poles of the earth of electric capacity, Detection electrode is connected with capacitive approach switch, as long as notebook computer is moved, the oscillatory circuit of capacitive approach switch will starting of oscillation, and then trigger alarm loudspeaker BL works, send alerting signal, reach antitheft object, the scheme on notebook computer fuselage is arranged on compared to traditional anti-theft starting switch, burglar alarm of the present utility model is not easily found by thief, thus avoid the situation that burglar alarm removed by thief, anti-theft effect is better,
(2) a kind of burglary prevention of laptop warning device of the present utility model, adopt battery to power to capacitive approach switch, as long as install battery, warning device is just in starting state, without the need to manually opened anti-theft feature; As long as notebook is moved, i.e. alert trigger, remind people's notebook to be moved by people in time, meanwhile, audible alarm also can allow thief panic, abandons notebook and runs away, and the property of people can be protected well not incur loss;
(3) a kind of burglary prevention of laptop warning device of the present utility model, circuit structure is simple, low cost of manufacture, controls highly sensitive, easy to utilize.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of burglary prevention of laptop warning device of the present utility model;
Fig. 2 is theory diagram of the present utility model.
Embodiment
For understanding content of the present utility model further, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.
Embodiment 1
Composition graphs 1, a kind of burglary prevention of laptop warning device of the present embodiment, comprises Detection electrode (the induced electricity pole plate namely in Fig. 1), capacitive approach switch, astable multivibrator power supply, astable multivibrator and alarming horn BL; Described Detection electrode is connected with the input end of capacitive approach switch, and this capacitive approach switch is electrically connected with astable multivibrator by astable multivibrator power supply, and the output terminal of described astable multivibrator is connected with alarming horn BL.
The present embodiment is using Detection electrode, notebook computer as the two poles of the earth of electric capacity, this Detection electrode is connected with capacitive approach switch, as long as notebook computer is moved, the oscillatory circuit of capacitive approach switch will starting of oscillation, and then trigger alarm circuit working, send alerting signal, reach antitheft object.Analyze below in conjunction with the burglar alarm principle of physical circuit to the present embodiment:
Referring to Fig. 2, the capacitive approach switch of the present embodiment comprises triode VT1, VT2, tunable capacitor C0, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3, diode VD1, VD2, VD3, inductance L 1, the direct supply of relay K, switch S and 12V; The model of triode VT1 is 9018, and the model of triode VT2 is 9014, and the model of diode VD2 is 1N4184x2.
The collector of triode VT1 is connected with Detection electrode, and this Detection electrode is of a size of 100mm*150mm.The base stage of triode VT1 separates two-way, one tunnel is connected with the emitter of triode VT2 through electric capacity C1, another road is connected with one end of inductance L 1, one end of electric capacity C4, one end of electric capacity C5, one end of switch S respectively through resistance R1, the other end of inductance L 1 is connected with the collector of triode VT1, described tunable capacitor C0 is parallel between the collector and emitter of triode VT1, the equal ground connection of the other end of electric capacity C4, electric capacity C5; The other end of switch S connects direct supply, and this direct supply is also for relay K is powered, and one end of relay K is connected with the collector of triode VT2, and the two ends of this relay K are parallel with diode VD3, and the positive pole of VD3 is connected with the collector of triode VT2.
The emitter of triode VT1 also separates two-way, one tunnel is connected with the emitter of triode VT2 through resistance R2, another road is connected with the positive pole of diode VD1, the negative pole of diode VD2 respectively through electric capacity C2, the negative pole of diode VD1 is connected with one end of resistance R3, one end of electric capacity C3 respectively, the base stage of another termination triode VT2 of resistance R3, the positive pole of diode VD2, the other end of electric capacity C3 are all connected with the emitter of triode VT2.
In the present embodiment, the capacity regulating scope of tunable capacitor C0 is 3 ~ 25pF, and the capacity of electric capacity C1, C2, C3, C4, C5 is respectively 0.01 μ F, 680pF, 0.1 μ F, 47 μ F and 0.1 μ F; The resistance of resistance R1, R2, R3 is respectively 470K, 10K and 3.3K; The inductance value of inductance L 1 is 2mH.
Described astable multivibrator comprises time-base integrated circuit IC1, resistance R4, R5, and the model of electric capacity C6, C7 and electrolysis constant volume C8, time-base integrated circuit IC1 is NE555.Described astable multivibrator power supply DC is connected with the 8th pin with the 4th pin of time-base integrated circuit IC1 respectively, and this astable multivibrator power supply is also connected with the 7th pin of time-base integrated circuit IC1 by resistance R4; The 7th described pin is connected with the 6th pin with the 2nd pin of time-base integrated circuit IC1 by resistance R5, and the 3rd pin of time-base integrated circuit IC1 is connected with the positive pole of electrolysis constant volume C8, and the negative pole of electrolysis constant volume C8 connects the positive pole of alarming horn BL; 2nd pin of time-base integrated circuit IC1 is then all connected with the negative pole of alarming horn BL by the 1st pin of electric capacity C7, time-base integrated circuit IC1 with the 5th pin of the 6th pin by electric capacity C6, time-base integrated circuit IC1.
The course of work of the present embodiment is: when notebook computer be fixed position motionless time, Detection electrode and notebook computer are respectively as the two poles of the earth of electric capacity, an electric capacity is formed between Detection electrode and notebook computer, this capacitance is certain, the oscillator of capacitive approach switch circuit does not work, relay K not adhesive, power source of alarm is powered and is not worked.Once notebook computer is moved, this pole plate of notebook computer disappears, and Detection electrode forms an electric capacity with the earth, and its capacitance reduces, and the reduction of electric capacity can increase the amount of positive feedback of the oscillator that triode VT1 forms, cause the oscillatory circuit starting of oscillation that triode VT1 forms.Now, the radio frequency voltage signal that the emitter of triode VT1 exports becomes DC control signal after diode VD1, VD2 detection, and this signal makes triode VT2 conducting, and relay K obtains electric adhesive, connect astable multivibrator power supply, warning circuit is started working.In the present embodiment, C0 is adjustment of sensitivity electric capacity, regulates its size can adjust the critical value of oscillator starting of oscillation, failure of oscillation, thus adjustment control control distance, the size of object.
A kind of burglary prevention of laptop warning device of the present embodiment, is arranged on the scheme on notebook computer fuselage compared to traditional anti-theft starting switch, is not easily found by thief, thus avoids the situation that burglar alarm removed by thief, and anti-theft effect is better.Adopt battery (i.e. 12V direct supply) to power to capacitive approach switch, as long as install battery, warning device is just in starting state, without the need to manually opened anti-theft feature; As long as notebook is moved, i.e. alert trigger, remind people's notebook to be moved by people in time, meanwhile, audible alarm also can allow thief panic, abandons notebook and runs away, and the property of people can be protected well not incur loss.In addition, the circuit structure of the present embodiment is simple, low cost of manufacture, controls highly sensitive, easy to utilize.
Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (4)
1. a burglary prevention of laptop warning device, is characterized in that: comprise Detection electrode, capacitive approach switch, astable multivibrator power supply, astable multivibrator and alarming horn BL; Described Detection electrode is connected with the input end of capacitive approach switch, and this capacitive approach switch is electrically connected with astable multivibrator by astable multivibrator power supply, and the output terminal of described astable multivibrator is connected with alarming horn BL.
2. a kind of burglary prevention of laptop warning device according to claim 1, it is characterized in that: described capacitive approach switch comprises triode VT1, VT2, tunable capacitor C0, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3, diode VD1, VD2, VD3, inductance L 1, relay K, switch S and direct supply; Wherein, the collector of triode VT1 is connected with Detection electrode;
The base stage of triode VT1 separates two-way, one tunnel is connected with the emitter of triode VT2 through electric capacity C1, another road is connected with one end of inductance L 1, one end of electric capacity C4, one end of electric capacity C5, one end of switch S respectively through resistance R1, the other end of inductance L 1 is connected with the collector of triode VT1, described tunable capacitor C0 is parallel between the collector and emitter of triode VT1, the equal ground connection of the other end of electric capacity C4, electric capacity C5; The other end of switch S connects direct supply, and this direct supply is also for relay K is powered, and one end of relay K is connected with the collector of triode VT2, and the two ends of this relay K are parallel with diode VD3;
The emitter of triode VT1 separates two-way, one tunnel is connected with the emitter of triode VT2 through resistance R2, another road is connected with the positive pole of diode VD1, the negative pole of diode VD2 respectively through electric capacity C2, the negative pole of diode VD1 is connected with one end of resistance R3, one end of electric capacity C3 respectively, the base stage of another termination triode VT2 of resistance R3, the positive pole of diode VD2, the other end of electric capacity C3 are all connected with the emitter of triode VT2.
3. a kind of burglary prevention of laptop warning device according to claim 2, is characterized in that: the capacity of described tunable capacitor C0 is 3 ~ 25pF.
4. a kind of burglary prevention of laptop warning device according to Claims 2 or 3, is characterized in that: described astable multivibrator comprises time-base integrated circuit IC1, resistance R4, R5, electric capacity C6, C7 and electrolysis constant volume C8; Described astable multivibrator power supply DC is connected with the 8th pin with the 4th pin of time-base integrated circuit IC1 respectively, and this astable multivibrator power supply is also connected with the 7th pin of time-base integrated circuit IC1 by resistance R4; The 7th described pin is connected with the 6th pin with the 2nd pin of time-base integrated circuit IC1 by resistance R5, and the 3rd pin of time-base integrated circuit IC1 is connected with the positive pole of electrolysis constant volume C8, and the negative pole of electrolysis constant volume C8 connects the positive pole of alarming horn BL; 2nd pin of time-base integrated circuit IC1 is then all connected with the negative pole of alarming horn BL by the 1st pin of electric capacity C7, time-base integrated circuit IC1 with the 5th pin of the 6th pin by electric capacity C6, time-base integrated circuit IC1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520258382.8U CN204515959U (en) | 2015-04-24 | 2015-04-24 | A kind of burglary prevention of laptop warning device |
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| CN201520258382.8U CN204515959U (en) | 2015-04-24 | 2015-04-24 | A kind of burglary prevention of laptop warning device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105653996A (en) * | 2015-12-30 | 2016-06-08 | 天津大学 | Notebook computer anti-theft system and method based on mobile terminal in 2G network |
| CN106504693A (en) * | 2016-11-22 | 2017-03-15 | 国网山东省电力公司枣庄供电公司 | A kind of new window display |
-
2015
- 2015-04-24 CN CN201520258382.8U patent/CN204515959U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105653996A (en) * | 2015-12-30 | 2016-06-08 | 天津大学 | Notebook computer anti-theft system and method based on mobile terminal in 2G network |
| CN106504693A (en) * | 2016-11-22 | 2017-03-15 | 国网山东省电力公司枣庄供电公司 | A kind of new window display |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160424 |