CN203982516U - A kind of theft-peoof magnetic-control alarm - Google Patents
A kind of theft-peoof magnetic-control alarm Download PDFInfo
- Publication number
- CN203982516U CN203982516U CN201420442239.XU CN201420442239U CN203982516U CN 203982516 U CN203982516 U CN 203982516U CN 201420442239 U CN201420442239 U CN 201420442239U CN 203982516 U CN203982516 U CN 203982516U
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- triode
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Abstract
The utility model relates to a kind of theft-peoof magnetic-control alarm, it is characterized in that: described theft-peoof magnetic-control alarm comprises magnet, open type tongue tube, biasing resistor, NPN type triode, positive-negative-positive triode, alarm buzzer, shunt capacitance, switch and power supply, open type tongue tube is installed on the frame of door or window, on door leaf or sash, magnet is set, at door or window when closing state, under normal condition, window is in closed condition, tongue tube is closed, two triodes are in cut-off state, warning buzzer is sounding not, when door and window is surprisingly opened, as pried open, rushed open etc., tongue tube disconnects, two triodes are all in conducting state, alarm buzzer sends loud chimes of doom immediately, this theft-peoof magnetic-control alarm is made simple, volume is small and exquisite, with low cost, be applicable to penetration and promotion in the family.
Description
Technical field
The utility model relates to a kind of burglar alarm, relates in particular to a kind of theft-peoof magnetic-control alarm.
Background technology
The burglar alarm circuit occurring is in the market complicated, and cost is higher, is unfavorable for penetration and promotion in the family.
Summary of the invention
The utility model is exactly the above-mentioned defect that will overcome burglar alarm in prior art, provide a kind of with low cost, design brief, stable performance, making easily, simple, the simple installation of debugging, the small and exquisite theft-peoof magnetic-control alarm of volume.
For achieving the above object, the technical solution adopted in the utility model is: a kind of theft-peoof magnetic-control alarm, it is characterized in that: described theft-peoof magnetic-control alarm comprises magnet, open type tongue tube, biasing resistor, NPN type triode, positive-negative-positive triode, alarm buzzer, shunt capacitance, switch and power supply, open type tongue tube is installed on the frame of door or window, on door leaf or sash, magnet is set, at door or window during in closed condition, magnet and open type tongue tube are bonded to each other, open type tongue tube, biasing resistor, switch and power supply connect to form series circuit successively, the base stage of NPN type triode is connected between the open type tongue tube and biasing resistor of above-mentioned series circuit, the collector of NPN type triode is connected with the base stage of positive-negative-positive triode, shunt capacitance is connected in parallel on above-mentioned series circuit, the first point in parallel is between biasing resistor and switch, the second point in parallel is between power supply and open type tongue tube, the emitter of NPN type triode is connected in parallel on series circuit, the 3rd point in parallel is between open type tongue tube and the second point in parallel, the emitter of positive-negative-positive triode is connected in parallel on series circuit, the 4th point in parallel is between biasing resistor and the first point in parallel, the collector of positive-negative-positive triode is connected with alarm buzzer, alarm buzzer is connected in parallel on series circuit, the 5th in parallel o'clock between the second point in parallel and the 3rd point in parallel.
When magnet leaves open type tongue tube certain distance, open type tongue tube disconnects.The base potential of NPN type triode rises, and when NPN type triode is during in positive bias, NPN type triode enters conducting state.At this moment, positive-negative-positive triode is because the base stage working current that obtains NPN type triode and provide is also in conducting state.Finally, cause alarm buzzer to obtain electric and start to report to the police.
When magnet is during near open type tongue tube, open type tongue tube is closed.The base potential of NPN type triode declines, and NPN type triode is in cut-off state.At this moment, positive-negative-positive triode is because the base stage working current that loses NPN type triode and provide is in cut-off state.Cause alarm buzzer dead electricity and stop alarm.
Under normal condition, window is in closed condition, open type tongue tube is closed. and two triodes are in cut-off state, warning buzzer is sounding not, when door and window is surprisingly opened, as pried open, rushed open etc., open type tongue tube disconnects, two triodes are all in conducting state, and alarm buzzer sends loud chimes of doom immediately.
Accompanying drawing explanation
Fig. 1 is theft-peoof magnetic-control alarm schematic diagram
Wherein: C is magnet, S is open type tongue tube, and R is biasing resistor, Q1 is NPN type triode, and Q2 is positive-negative-positive triode, and B is alarm buzzer, D is shunt capacitance, K is switch, and E is power supply, and 1 is the first point in parallel, 2 is the second point in parallel, 3 is the 3rd point in parallel, and 4 is the 4th point in parallel, and 5 is the 5th point in parallel.
Embodiment
Referring to accompanying drawing 1, a kind of theft-peoof magnetic-control alarm, it is characterized in that: described theft-peoof magnetic-control alarm comprises magnet C, open type tongue tube S, biasing resistor R, NPN type triode Q1, positive-negative-positive triode Q2, alarm buzzer B, shunt capacitance D, K switch and power supply E, open type tongue tube S is installed on the frame of door or window, magnet C is set on door leaf or sash, at door or window during in closed condition, magnet C and open type tongue tube S are bonded to each other, open type tongue tube S, biasing resistor R, K switch and power supply E connect to form series circuit successively, the base stage of NPN type triode Q1 is connected between the open type tongue tube S and biasing resistor R of above-mentioned series circuit, the collector of NPN type triode Q1 is connected with the base stage of positive-negative-positive triode Q2, shunt capacitance D is connected in parallel on above-mentioned series circuit, the first point 1 in parallel is between biasing resistor R and K switch, the second point 2 in parallel is between power supply E and open type tongue tube S, the emitter of NPN type triode Q1 is connected in parallel on series circuit, the 3rd point 3 in parallel is between open type tongue tube S and the second point 2 in parallel, the emitter of positive-negative-positive triode Q2 is connected in parallel on series circuit, the 4th point 4 in parallel is between biasing resistor R and the first point 1 in parallel, the collector of positive-negative-positive triode Q2 is connected with alarm buzzer B, alarm buzzer B is connected in parallel on series circuit, the 5th point 5 in parallel is between the second point the 2 and the 3rd in parallel point 3 in parallel.
Claims (1)
1. a theft-peoof magnetic-control alarm, it is characterized in that: described theft-peoof magnetic-control alarm comprises magnet, open type tongue tube, biasing resistor, NPN type triode, positive-negative-positive triode, alarm buzzer, shunt capacitance, switch and power supply, open type tongue tube is installed on the frame of door or window, on door leaf or sash, magnet is set, at door or window during in closed condition, magnet and open type tongue tube are bonded to each other, open type tongue tube, biasing resistor, switch and power supply connect to form series circuit successively, the base stage of NPN type triode is connected between the open type tongue tube and biasing resistor of above-mentioned series circuit, the collector of NPN type triode is connected with the base stage of positive-negative-positive triode, shunt capacitance is connected in parallel on above-mentioned series circuit, the first point in parallel is between biasing resistor and switch, the second point in parallel is between power supply and open type tongue tube, the emitter of NPN type triode is connected in parallel on series circuit, the 3rd point in parallel is between open type tongue tube and the second point in parallel, the emitter of positive-negative-positive triode is connected in parallel on series circuit, the 4th point in parallel is between biasing resistor and the first point in parallel, the collector of positive-negative-positive triode is connected with alarm buzzer, alarm buzzer is connected in parallel on series circuit, the 5th in parallel o'clock between the second point in parallel and the 3rd point in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442239.XU CN203982516U (en) | 2014-08-04 | 2014-08-04 | A kind of theft-peoof magnetic-control alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420442239.XU CN203982516U (en) | 2014-08-04 | 2014-08-04 | A kind of theft-peoof magnetic-control alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203982516U true CN203982516U (en) | 2014-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420442239.XU Expired - Fee Related CN203982516U (en) | 2014-08-04 | 2014-08-04 | A kind of theft-peoof magnetic-control alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203982516U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767584A (en) * | 2019-01-22 | 2019-05-17 | 国网福建省电力有限公司三明供电公司 | A kind of coding anti-theft control device and its control method |
| CN113775194A (en) * | 2021-08-06 | 2021-12-10 | 上海建工一建集团有限公司 | Monitoring circuit and intelligent guardrail pole setting |
-
2014
- 2014-08-04 CN CN201420442239.XU patent/CN203982516U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767584A (en) * | 2019-01-22 | 2019-05-17 | 国网福建省电力有限公司三明供电公司 | A kind of coding anti-theft control device and its control method |
| CN113775194A (en) * | 2021-08-06 | 2021-12-10 | 上海建工一建集团有限公司 | Monitoring circuit and intelligent guardrail pole setting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20170804 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |