CN101937601B - Anti-theft device - Google Patents
Anti-theft device Download PDFInfo
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- CN101937601B CN101937601B CN 200910054360 CN200910054360A CN101937601B CN 101937601 B CN101937601 B CN 101937601B CN 200910054360 CN200910054360 CN 200910054360 CN 200910054360 A CN200910054360 A CN 200910054360A CN 101937601 B CN101937601 B CN 101937601B
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- slide fastener
- voltage
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- coupled
- theft device
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Abstract
The invention discloses an anti-theft device. The anti-theft device comprises a power supply unit, a zipper body, a zip-fastener, a voltage measurement unit and a warning unit, wherein the zipper body is coupled to the power supply unit; the zip-fastener is coupled to the power supply unit and is arranged on the zipper body in a sliding way; the first end of the voltage measurement unit is coupled to the zipper body, while the second end of the voltage measurement unit is coupled to the zip-fastener so as to measure the voltage between the zipper body and the zip-fastener and generate a control signal according to a voltage value; and the warning unit is coupled to the voltage measurement unit and is used for receiving the control signal and deciding whether to trigger or not according to the control signal. The anti-theft device can decide whether to trigger the warning unit by the voltage between the zip-fastener and the zipper body. Therefore, when the zip-fastener is moved by external force, the warning unit can be triggered to produce an anti-theft effect.
Description
Technical field
The present invention relates to a kind of anti-theft device, particularly relate to a kind of chain stretching device of antitheft.
Background technology
Slide fastener is a kind of indispensable spare part in life, and is to be seen everywhere.Clothes, jeans, wallet, knapsack, suitcase, even the cotton-wadded quilt that uses in bed, the existence that pillowcase can be seen slide fastener.Slide fastener has brought incomparable convenience to life.For instance, during thing in the user will take wallet or knapsack, as long as lightly slide fastener is opened, the inner thing of can taking.But, also because of the easy use of slide fastener, slide fastener often becomes the target that the thief sets about.
Especially, domestic present thief is rampant, in streets and lanes still are public transport, all has thief's figure to exist.Even in the crowd's that do not crowd place, the general common people still can be regarded as the mobile phone in pocket and the suitcase to lay special stress on protecting object.Even so, still have the slide fastener of come to light pocket and suitcase to be opened repeatedly, the situation that the hand-set from stolen inside making is stolen takes place.Therefore, the demand of antitheft is also increasingly high.
Summary of the invention
For overcoming the deficiency of above-mentioned prior art, the technical matters that the present invention will solve provides a kind of anti-theft device, can produce the caution message of antitheft.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of anti-theft device comprises:
Power supply unit;
The slide fastener body is coupled to this power supply unit;
Slide fastener is coupled to this power supply unit, and is slidedly arranged on this slide fastener body;
Voltage measurement unit, its first end is coupled to this slide fastener body, and its second end is coupled to this slide fastener, measuring the magnitude of voltage between this slide fastener body and this slide fastener, and produces controlling signal according to this magnitude of voltage; And
The caution unit is coupled to this voltage measurement unit, in order to receive and to determine whether trigger according to this controlling signal.
Described anti-theft device also comprises switch, is coupled to this power supply unit.
This caution unit is motor or loudspeaker.
This slide fastener body and this slide fastener fastener electric conductivity.
This voltage measurement unit is the low-voltage measuring appliance, and when this magnitude of voltage during less than the predeterminated voltage value, this controlling signal triggers should caution unit.
This power supply unit is a battery.
Compared with prior art, beneficial effect of the present invention can be:
Because the present invention can determine whether triggering the caution unit by the voltage of measuring between slide fastener and the slide fastener body, therefore, when slide fastener was moved by external strength, the caution unit just can be triggered and produce the effect of antitheft.In addition, anti-theft device of the present invention also can let the user determine whether will activate by switch.Therefore, can reduce the loss of electric power and prolong the time of actual antitheft.
Description of drawings
Fig. 1 is the synoptic diagram of the anti-theft device of the embodiment of the invention.
Fig. 2 is the equivalent circuit diagram of the anti-theft device of Fig. 1.
[primary clustering symbol description]
100: anti-theft device
110: power supply unit
120: the slide fastener body
130: slide fastener
140: voltage measurement unit
150: the caution unit
160: switch
E1 ~ E5: end points
R0: variable resistor
Embodiment
Do further detailed explanation below in conjunction with accompanying drawing and embodiment specific embodiments of the invention, but should not limit protection scope of the present invention with this.
Fig. 1 is the synoptic diagram of the anti-theft device of the embodiment of the invention.Please refer to Fig. 1, anti-theft device 100 mainly comprises power supply unit 110, slide fastener body 120, slide fastener 130, voltage measurement unit 140 and caution unit 150.Slide fastener body 120 is coupled to power supply unit 110.Slide fastener 130 is coupled to power supply unit 110, and is slidedly arranged on slide fastener body 120.In the present embodiment, slide fastener body 120 for example is a metal material with slide fastener 130, and all can have electric conductivity.
The first end E1 of voltage measurement unit 140 is coupled to slide fastener body 120, and its second end E2 is coupled to slide fastener 130.Voltage measurement unit 140 is in order to measure the magnitude of voltage of 130 of slide fastener body 120 and slide fasteners.That is to say, when slide fastener 130 and slide fastener body 120 when end points E3 contacts, voltage measurement unit 140 can be measured the end points E3 of slide fastener bodies 120 and the potential difference (PD) between end points E4.Wherein, end points E3 representes slide fastener 130 and slide fastener body 120 position contacting, so the position that can slide on slide fastener body 120 along with slide fastener 130 in the position of end points E3 and changing.After voltage measurement unit 140 is obtained the magnitude of voltage between E3, the E4 two ends, just produce controlling signal according to magnitude of voltage.
Fig. 2 is the equivalent circuit diagram of the anti-theft device of Fig. 1.Please refer to Fig. 1 and Fig. 2, slide fastener 130 slides on slide fastener body 120, and changes the distance of two ends E3, E4, is equivalent to the effect of variable resistor R0.When moved on the right side of slide fastener 130 more past Fig. 1, the distance of two ends E3, E4 was far away more, made that the impedance between two ends E3, the E4 is also big more.Relatively, when moved in the left side of slide fastener 130 more past Fig. 1, the distance of two ends E3, E4 was near more, made that the impedance between two ends E3, the E4 is more little.As two ends E3, when E4 overlaps, the impedance between two ends E3, the E4 levels off to zero.When another end points E5 of end points E3 and slide fastener body 120 overlapped, the impedance between two ends E3, the E4 roughly was equivalent to the impedance of whole section slide fastener body 120.In the present embodiment, when another end points E5 of end points E3 and slide fastener body 120 overlapped, slide fastener body 120 was closed fully state.
Further, power supply unit 110 for example is a battery, and the voltage of 5V can be provided.When end points E3 and end points E5 overlapping, voltage measurement unit 140 measures the voltage of 5V, and the voltage of output 5V is to warning unit 150.When end E3 more past end points E4 near the time, voltage measurement unit 140 measured voltage are less than 5V, and more and more littler.Voltage measurement unit 140 is an example with the low-voltage measuring appliance, and when voltage measurement unit 140 measured voltage values during less than predeterminated voltage value (like 4.5V), controlling signal triggers caution unit 150.In the present embodiment, controlling signal for example is 0V.When voltage measurement unit 140 output voltage 0V, caution unit 150 just can conducting, and produces the sound of caution.
In addition, in the present embodiment, anti-theft device 100 also can comprise switch 160, is coupled to power supply unit 110.The user can just open switch when needs start alarm function, to reduce the loss of electric power.
From user's viewpoint, anti-theft device 100 can be applied on the zip pocket of suitcase, knapsack, suitcase or clothes trousers usually.When the user will leave Bao Bao or enter into the numerous environment of the crowd, the user can open switch 160, made power supply unit 110 begin to supply power to slide fastener body 230 and voltage measurement unit 140.At this moment, if when slide fastener body 120 is in closed state (end points E3, E5 overlap), voltage measurement unit 140 measures the voltage of 5V, and the voltage of output 5V is to warning unit 150.Caution unit 150 does not have at its two ends under the situation of potential difference (PD), does not produce any action.
Afterwards, if slide fastener body 120 is drawn back, make that voltage measurement unit 140 output voltage 0V were to warning unit 150 when voltage measurement unit 140 measured the voltage less than 4.5V.At this moment, the potential difference (PD) at caution 150 two ends, unit is 5V, and the state of conducting just continues to commit a crime and the sound that sends high frequency or high-decibel is reminded the user or frighten the resistance ruffian, and then reaches the effect of antitheft.
In sum, because the present invention can determine whether triggering the caution unit by the voltage of measuring between slide fastener and the slide fastener body.Therefore, when slide fastener was moved by external strength, the caution unit just can be triggered and produce the effect of antitheft.In addition, anti-theft device of the present invention also can let the user determine whether will activate by switch.Therefore, can reduce the loss of electric power and prolong the time of actual antitheft.
The above is merely preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention.Have common knowledge the knowledgeable in the technical field under any, do not breaking away from the spirit and scope of the present invention, when can doing various changes and retouching, so protection scope of the present invention should be looked claims institute confining spectrum and is as the criterion.
Claims (6)
1. anti-theft device comprises:
Power supply unit;
The slide fastener body is coupled to this power supply unit;
Slide fastener is coupled to this power supply unit, and is slidedly arranged on this slide fastener body;
Voltage measurement unit, its first end is coupled to this slide fastener body, and its second end is coupled to this slide fastener, measuring the magnitude of voltage between this slide fastener body and this slide fastener, and produces controlling signal according to this magnitude of voltage; And
The caution unit is coupled to this voltage measurement unit, in order to receive and to determine whether trigger according to this controlling signal.
2. anti-theft device according to claim 1 is characterized in that also comprising switch, is coupled to this power supply unit.
3. anti-theft device according to claim 1 is characterized in that this caution unit is motor or loudspeaker.
4. anti-theft device according to claim 1 is characterized in that this slide fastener body and this slide fastener fastener electric conductivity.
5. anti-theft device according to claim 1 is characterized in that this voltage measurement unit is the low-voltage measuring appliance, and when this magnitude of voltage during less than the predeterminated voltage value, this controlling signal triggers should caution unit.
6. anti-theft device according to claim 1 is characterized in that this power supply unit is a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910054360 CN101937601B (en) | 2009-07-03 | 2009-07-03 | Anti-theft device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910054360 CN101937601B (en) | 2009-07-03 | 2009-07-03 | Anti-theft device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101937601A CN101937601A (en) | 2011-01-05 |
| CN101937601B true CN101937601B (en) | 2012-06-27 |
Family
ID=43390913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910054360 Active CN101937601B (en) | 2009-07-03 | 2009-07-03 | Anti-theft device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101937601B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2865375Y (en) * | 2006-01-06 | 2007-02-07 | 雷松 | Antitheft zipper |
| CN2884992Y (en) * | 2006-03-31 | 2007-04-04 | 成涛 | A multifunctional anti-theft alarming bag |
| CN2907336Y (en) * | 2006-02-17 | 2007-06-06 | 王若忱 | Multi-functional anti-theft box |
| CN201085146Y (en) * | 2007-06-05 | 2008-07-16 | 林彦华 | Maintenance overhaul zipper structure |
-
2009
- 2009-07-03 CN CN 200910054360 patent/CN101937601B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2865375Y (en) * | 2006-01-06 | 2007-02-07 | 雷松 | Antitheft zipper |
| CN2907336Y (en) * | 2006-02-17 | 2007-06-06 | 王若忱 | Multi-functional anti-theft box |
| CN2884992Y (en) * | 2006-03-31 | 2007-04-04 | 成涛 | A multifunctional anti-theft alarming bag |
| CN201085146Y (en) * | 2007-06-05 | 2008-07-16 | 林彦华 | Maintenance overhaul zipper structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101937601A (en) | 2011-01-05 |
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