CN204576707U - A kind of burglar alarm - Google Patents
A kind of burglar alarm Download PDFInfo
- Publication number
- CN204576707U CN204576707U CN201520180078.6U CN201520180078U CN204576707U CN 204576707 U CN204576707 U CN 204576707U CN 201520180078 U CN201520180078 U CN 201520180078U CN 204576707 U CN204576707 U CN 204576707U
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- CN
- China
- Prior art keywords
- resistance
- triode
- parallel
- integrated chip
- collector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Burglar Alarm Systems (AREA)
Abstract
The utility model discloses a kind of burglar alarm, comprise electric equipment, the two ends of described electric equipment are connected in parallel to resistance R1, described resistance R1 is connected in parallel to diode VD and resistance R2, described resistance R2 is connected with 1 pin of integrated chip IC, 5 pin of described integrated chip IC are connected in parallel to resistance R3, the base stage of triode VT1 and electric capacity C, the other end of described electric capacity C is connected in parallel to collector and the loudspeaker BL of triode VT2, the collector of described triode VT1 is connected with the base stage of triode VT2, the grounded emitter of described triode VT1, the emitter of described triode VT2 is connected with resistance R3.The utility model structure is simple, reasonable in design, can effectively prevent electrical equipment stolen, and easy to use, and cost of manufacture is low.
Description
Technical field
The utility model relates to a kind of warning device, is specifically related to a kind of housed device burglar alarm.
Background technology
Along with the raising of people's living standard, family more or less all can place some domestic electric appliances costly, and the household electrical appliance of these costlinesses often become the stealing object of thief, so need design a kind of simple and convenient, be applicable to the anti-theft alarm device for electric equipment of family expenses.
Utility model content
Utility model object: the purpose of this utility model is to solve deficiency of the prior art, provides a kind of structure simple, the anti-theft alarm device for electric equipment that cost of manufacture is low.
Technical scheme: a kind of burglar alarm described in the utility model, comprise electric equipment, the two ends of described electric equipment are connected in parallel to resistance R1, described resistance R1 is connected in parallel to diode VD and resistance R2, described resistance R2 is connected with 1 pin of integrated chip IC, 5 pin of described integrated chip IC are connected in parallel to resistance R3, the base stage of triode VT1 and electric capacity C, the other end of described electric capacity C is connected in parallel to collector and the loudspeaker BL of triode VT2, the collector of described triode VT1 is connected with the base stage of triode VT2, the grounded emitter of described triode VT1, the emitter of described triode VT2 is connected with resistance R3.
As preferably, described integrated chip IC is photoelectrical coupler.
Beneficial effect: the utility model structure is simple, reasonable in design, can effectively prevent electrical equipment stolen, and easy to use, and cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
A kind of burglar alarm as shown in Figure 1, comprise electric equipment 1, the two ends of electric equipment 1 are connected in parallel to resistance R1, resistance R1 is connected in parallel to diode VD and resistance R2, resistance R2 is connected with 1 pin of integrated chip IC, 5 pin of integrated chip IC are connected in parallel to resistance R3, the base stage of triode VT1 and electric capacity C, the other end of electric capacity C is connected in parallel to collector and the loudspeaker BL of triode VT2, the collector of triode VT1 is connected with the base stage of triode VT2, the grounded emitter of triode VT1, the emitter of triode VT2 is connected with resistance R3, wherein integrated chip IC is optocoupler 4n25.
When electrical equipment is stolen, the voltage on electric wire can be lowered, and the light emitting diode of integrated chip IC inside is extinguished, and photistor ends, and speaker operation, sends chimes of doom.
Claims (2)
1. a burglar alarm, it is characterized in that: comprise electric equipment (1), the two ends of described electric equipment (1) are connected in parallel to resistance R1, described resistance R1 is connected in parallel to diode VD and resistance R2, described resistance R2 is connected with 1 pin of integrated chip IC, 5 pin of described integrated chip IC are connected in parallel to resistance R3, the base stage of triode VT1 and electric capacity C, the other end of described electric capacity C is connected in parallel to collector and the loudspeaker BL of triode VT2, the collector of described triode VT1 is connected with the base stage of triode VT2, the grounded emitter of described triode VT1, the emitter of described triode VT2 is connected with resistance R3.
2. a kind of burglar alarm according to claim 1, is characterized in that: described integrated chip IC is photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180078.6U CN204576707U (en) | 2015-03-27 | 2015-03-27 | A kind of burglar alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180078.6U CN204576707U (en) | 2015-03-27 | 2015-03-27 | A kind of burglar alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204576707U true CN204576707U (en) | 2015-08-19 |
Family
ID=53869313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520180078.6U Expired - Fee Related CN204576707U (en) | 2015-03-27 | 2015-03-27 | A kind of burglar alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204576707U (en) |
-
2015
- 2015-03-27 CN CN201520180078.6U patent/CN204576707U/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: An Caizhong Inventor before: Meng Rumiao |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160601 Address after: 102605, Beijing, Daxing District Qingyun Town Industrial Committee Room 301 Patentee after: Beijing Xingtai Star Electronic Technology Co. Ltd. Address before: 311817 Zhejiang city of Shaoxing province Zhuji City Ying Dian Jie Zhen Zi Lang Cun Qi He Chi Jia No. 40 Patentee before: Meng Rumiao |
|
| 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: 20150819 Termination date: 20180327 |