CN204856790U - Hidden burglar alarm - Google Patents
Hidden burglar alarm Download PDFInfo
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- CN204856790U CN204856790U CN201520436003.XU CN201520436003U CN204856790U CN 204856790 U CN204856790 U CN 204856790U CN 201520436003 U CN201520436003 U CN 201520436003U CN 204856790 U CN204856790 U CN 204856790U
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- 239000002184 metal Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 3
- 239000012467 final product Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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- Burglar Alarm Systems (AREA)
Abstract
The utility model discloses a hidden burglar alarm, including resistance R1, electric capacity C1, chip IC1 and inductance L1, electric capacity C2 and inductance L1 are connected to electric capacity C1's one end, and inductor G and electric capacity C3 are connected to inductance L1's the other end, and electric capacity C5 is connected to inductor G's the other end, and electric capacity C1's the other end, electric capacity C4, resistance R3, potentiometre RP1's a stiff end, potentiometre RP1's slip end, triode V2's projecting pole, triode V4's projecting pole, triode V5's projecting pole and power E's negative pole and ground connection are connected to electric capacity C5's the other end. The utility model discloses the burglar alarm circuit adopts the response metal sheet as triggering element, as long as the staff is close to can trigger alarm, need not human direct touch, has avoided ordinary alarm in the hidden danger of wearing the unable work of gloves, and circuit structure is simple simultaneously, the few cost of manufacture of components and parts is low, the debugging is convenient, is fit for the use of ordinary family.
Description
Technical field
The utility model relates to a kind of alarm, specifically a kind of concealed theft-proof alarm.
Background technology
Along with the development of security protection science and technology, alarm on market emerges in an endless stream, wherein a kind of touching warner liking because of the triggering people of receiving timely, easy to use be arranged on Anti-theft door handle, the trigger element of this alarm is Touching electrode, once have people to touch door handle chance start alarm, but there is a serious shortcoming in this alarm, select crafty wearing gloves to commit a crime once burglar and just can isolate human body and Touching electrode, prevent alarm from opening, therefore anti-theft effect is had a strong impact on.
Utility model content
The purpose of this utility model is to provide a kind of structure simple, the anti-concealed theft-proof alarm cracked, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of concealed theft-proof alarm, comprise resistance R1, electric capacity C1, chip IC 1 and inductance L 1, one end of described electric capacity C1 connects electric capacity C2 and inductance L 1, the other end of inductance L 1 connects inductor G and electric capacity C3, the other end of inductor G connects electric capacity C5, the other end of electric capacity C5 connects the other end of electric capacity C1, electric capacity C4, resistance R3, a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, the emitter of triode V2, the emitter of triode V4, the emitter of triode V5 and the negative pole of power supply E ground connection, the other end contact resistance R2 of electric capacity C2 and the collector of triode V1, the other end contact resistance R1 of electric capacity C3, the anode of diode D1 and the base stage of triode V1, the negative electrode of diode D1 connects another stiff end of potentiometer RP1, the other end contact resistance R2 of resistance R1, resistance R4, resistance R7, the collector of triode V3, the pin 5 of chip IC 1 and the pin 6 of chip IC 1, the other end of resistance R7 connects loudspeaker B and switch S, the other end of the emitter contact resistance R3 of triode V1, the other end of electric capacity C4 and the base stage of triode V2, the other end of the collector contact resistance R4 of triode V2 and resistance R5, the base stage of the other end connecting triode V3 of resistance R5, the base stage of the emitter connecting triode V4 of triode V3, the collector of triode V4 connects the pin 2 of chip IC 1, the pin 7 contact resistance R6 of chip IC 1, the other end of resistance R6 connects the pin 8 of chip IC 1, the pin 3 contact resistance R8 of chip IC 1, the base stage of the other end connecting triode V5 of resistance R8, the collector of triode V5 connects the other end of loudspeaker B, the other end of the positive pole connecting valve S of power supply E, the model of chip IC 1 is CW9561.
Compared with prior art, the beneficial effects of the utility model are: the utility model burglar alarm circuit adopts induction sheet metal as trigger element, as long as staff is near getting final product triggered alarm, directly touch without the need to human body, avoid the hidden danger that common alarm cannot work at wearing gloves, circuit structure is simple simultaneously, the few cost of manufacture of components and parts is low, debugging is convenient, is applicable to average family and uses.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of concealed theft-proof alarm.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of concealed theft-proof alarm, comprise resistance R1, electric capacity C1, chip IC 1 and inductance L 1, one end of described electric capacity C1 connects electric capacity C2 and inductance L 1, the other end of inductance L 1 connects inductor G and electric capacity C3, the other end of inductor G connects electric capacity C5, the other end of electric capacity C5 connects the other end of electric capacity C1, electric capacity C4, resistance R3, a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, the emitter of triode V2, the emitter of triode V4, the emitter of triode V5 and the negative pole of power supply E ground connection, the other end contact resistance R2 of electric capacity C2 and the collector of triode V1, the other end contact resistance R1 of electric capacity C3, the anode of diode D1 and the base stage of triode V1, the negative electrode of diode D1 connects another stiff end of potentiometer RP1, the other end contact resistance R2 of resistance R1, resistance R4, resistance R7, the collector of triode V3, the pin 5 of chip IC 1 and the pin 6 of chip IC 1, the other end of resistance R7 connects LED H and switch S, the other end of the emitter contact resistance R3 of triode V1, the other end of electric capacity C4 and the base stage of triode V2, the other end of the collector contact resistance R4 of triode V2 and resistance R5, the base stage of the other end connecting triode V3 of resistance R5, the base stage of the emitter connecting triode V4 of triode V3, the collector of triode V4 connects the pin 2 of chip IC 1, the pin 7 contact resistance R6 of chip IC 1, the other end of resistance R6 connects the pin 8 of chip IC 1, the pin 3 contact resistance R7 of chip IC 1, the base stage of the other end connecting triode V5 of resistance R7, the collector of triode V5 connects loudspeaker B, the other end of the positive pole connecting valve S of power supply E.
Inductor G is the sheet metal of 200X150mm.
Principle of work of the present utility model is: during use, there is a distributed capacitance C5 between Closing Switch S, G and ground, C5 and L1, C1, V1 form capacitance connecting three point type oscillator, in the loop be made up of C5, C1, L1, be series connection from alternating current path C5 and C1.When nobody is near G, C5 is less, and after it is connected with C1, the dividing potential drop at C5 two ends is comparatively large, and less in the dividing potential drop at C1 two ends, and the higher HF voltage in C5 two ends is fed to V1 base stage by C3, is enough to maintain bikini oscillator and produces vibration.Pressure drop now on R3 is higher, makes V2 conducting, and the complex pipe cut-off of V3 and V4 composition, cut off the power supply of four tones of standard Chinese pronunciation analog chip IC1, IC1 does not work, loudspeaker B not sounding.When there being people near inductor G, no matter whether thief wears gloves, as long as when hand is within the scope of the 5 ~ 80mm of this inductor, C5 value increases, the high frequency dividing potential drop at C5 two ends diminishes, and the undertension being fed to V1 base stage by C3 produces vibration to maintain V1 again, and V1 is failure of oscillation immediately.Now, the voltage drop on R3 is less, and V2 ends, V3, V4 conducting, and 2 pin of IC1 are equivalent to ground connection, and IC1 obtains electric work, and 3 pin export police whistle sound signal, is sounded the alarm after V5 amplifies by loudspeaker B.Potentiometer RP1 is for adjusting induction sensitivity.Circuit adopts induction sheet metal as trigger element, as long as staff is near getting final product triggered alarm, directly touch without the need to human body, avoid the hidden danger that common alarm cannot work at wearing gloves, circuit structure is simple simultaneously, the few cost of manufacture of components and parts is low, debugging is convenient, is applicable to average family and uses.
Claims (1)
1. a concealed theft-proof alarm, comprises resistance R1, electric capacity C1, chip IC 1 and inductance L 1, it is characterized in that, one end of described electric capacity C1 connects electric capacity C2 and inductance L 1, the other end of inductance L 1 connects inductor G and electric capacity C3, the other end of inductor G connects electric capacity C5, the other end of electric capacity C5 connects the other end of electric capacity C1, electric capacity C4, resistance R3, a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, the emitter of triode V2, the emitter of triode V4, the emitter of triode V5 and the negative pole of power supply E ground connection, the other end contact resistance R2 of electric capacity C2 and the collector of triode V1, the other end contact resistance R1 of electric capacity C3, the anode of diode D1 and the base stage of triode V1, the negative electrode of diode D1 connects another stiff end of potentiometer RP1, the other end contact resistance R2 of resistance R1, resistance R4, resistance R7, the collector of triode V3, the pin 5 of chip IC 1 and the pin 6 of chip IC 1, the other end of resistance R7 connects loudspeaker B and switch S, the other end of the emitter contact resistance R3 of triode V1, the other end of electric capacity C4 and the base stage of triode V2, the other end of the collector contact resistance R4 of triode V2 and resistance R5, the base stage of the other end connecting triode V3 of resistance R5, the base stage of the emitter connecting triode V4 of triode V3, the collector of triode V4 connects the pin 2 of chip IC 1, the pin 7 contact resistance R6 of chip IC 1, the other end of resistance R6 connects the pin 8 of chip IC 1, the pin 3 contact resistance R8 of chip IC 1, the base stage of the other end connecting triode V5 of resistance R8, the collector of triode V5 connects the other end of loudspeaker B, the other end of the positive pole connecting valve S of power supply E, the model of chip IC 1 is CW9561.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520436003.XU CN204856790U (en) | 2015-06-24 | 2015-06-24 | Hidden burglar alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520436003.XU CN204856790U (en) | 2015-06-24 | 2015-06-24 | Hidden burglar alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204856790U true CN204856790U (en) | 2015-12-09 |
Family
ID=54747319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520436003.XU Expired - Fee Related CN204856790U (en) | 2015-06-24 | 2015-06-24 | Hidden burglar alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204856790U (en) |
-
2015
- 2015-06-24 CN CN201520436003.XU patent/CN204856790U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Qiang Inventor before: Yao Zhiyong |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160912 Address after: 528051, Guangdong, Foshan Chancheng District, Foshan Avenue, 157 north, third storey room Patentee after: Foshan City Department of Dingxin Technology Co. Ltd. Address before: 315700, seven Li village, Xinqiao Town, Xiangshan County, Zhejiang, Ningbo Patentee before: Yao Zhiyong |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20180624 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |