CN203562062U - Burglar alarm for valuables - Google Patents
Burglar alarm for valuables Download PDFInfo
- Publication number
- CN203562062U CN203562062U CN201320723443.4U CN201320723443U CN203562062U CN 203562062 U CN203562062 U CN 203562062U CN 201320723443 U CN201320723443 U CN 201320723443U CN 203562062 U CN203562062 U CN 203562062U
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- triode
- resistance
- integrated chip
- loudspeaker
- alarm
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Abstract
The utility model discloses a burglar alarm for valuables. The burglar alarm for the valuables comprises a battery, a switch, a first triode, a second triode, a photoresistor, a loudspeaker, a first resistor, a second resistor, a third resistor, a capacitor and a sound effect integrated chip. The alarm is put in a closed indoor space with a certain light intensity, if the space is closed, the photoresistor presents a high resistance due to no light illumination, the firs triode is cut off, the sound effect integrated chip does not operate due to the cut-off of a power supply circuit, and correspondingly, the loudspeaker does not make any sound; if light illumination occurs, the photoresistor presents a low resistance, the first triode is in a saturation state, the power supply circuit of the sound effect integrated chip is conducted, a sound signal is amplified via the second triode, and the loudspeaker is driven to emit an alarm sound. The burglar alarm for the valuables is advantaged by simple circuit structure, less components, and low cost, and the burglar alarm can be promoted in ordinary families.
Description
Technical field
The utility model relates to a kind of household alarm, relates in particular to a kind of theft-proof alarm for valuable articles.
Background technology
Along with improving constantly of people's living standard, various electronic products and valuables are had by many families, but lawless person is also more and more, and steal phenomenon is of common occurrence.Alarm is many problems for people have solved, but the most of complicated structure of the alarm on market, and price is higher, is difficult to popularize.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of theft-proof alarm for valuable articles.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of theft-proof alarm for valuable articles, comprise battery, switch, the first triode, the second triode, photoresistance, loudspeaker, the first resistance, the second resistance, the 3rd resistance, electric capacity and audio integrated chip, the positive pole of described battery is connected with the first end of described switch, the second end of described switch is connected with the collector of described the first triode and the first end of described photoresistance respectively, the second end of described photoresistance is connected with the base stage of described the first triode, the emitter of described the first triode respectively with the first end of described the first resistance, the first end of described electric capacity is connected with the power end of described audio integrated chip, the second end of described the first resistance is connected with the first end of described loudspeaker, the second end of described loudspeaker is connected with the collector of described the second triode, the base stage of described the second triode is connected with the first end of described the 3rd resistance, the second end of described the 3rd resistance is connected with the output terminal of described audio integrated chip, the emitter of described the second triode respectively with the earth terminal of described audio integrated chip, the second end of described electric capacity and the negative pole of described battery are connected, the first end of described the second resistance is connected with the first crystal oscillator end of described audio integrated chip, the second end of described the second resistance is connected with the second crystal oscillator end of described audio integrated chip.
The beneficial effects of the utility model are:
The utility model is a kind of theft-proof alarm for valuable articles, utilizes photoresistance because light changes the feature that causes change in resistance, causes that light gives the alarm while changing in robber commits theft process, circuit structure is simple, components and parts are few, and cost is low, can in general family, promote.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of theft-proof alarm for valuable articles of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of theft-proof alarm for valuable articles of the utility model, comprise battery E, switch S, the first triode VT1, the second triode VT2, photoresistance RL, loudspeaker BY, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, capacitor C and audio integrated chip IC, the positive pole of battery E is connected with the first end of switch S, the second end of switch S is connected with the collector of the first triode VT1 and the first end of photoresistance RL respectively, the second end of photoresistance RL is connected with the base stage of the first triode VT1, the emitter of the first triode VT1 respectively with the first end of the first resistance R 1, the first end of capacitor C is connected with the power end of audio integrated chip IC, the second end of the first resistance R 1 is connected with the first end of loudspeaker BY, the second end of loudspeaker BY is connected with the collector of the second triode VT2, the base stage of the second triode VT2 is connected with the first end of the 3rd resistance R 3, the second end of the 3rd resistance R 3 is connected with the output terminal of audio integrated chip IC, the emitter of the second triode VT2 respectively with the earth terminal of audio integrated chip IC, the second end of capacitor C is connected with the negative pole of battery E, the first end of the second resistance R 2 is connected with the first crystal oscillator end of audio integrated chip IC, the second end of the second resistance R 2 is connected with the second crystal oscillator end of audio integrated chip IC.
This alarm is placed in the indoor closed space that has certain light intensity, if this space-closed, photoresistance RL is because being high resistance without irradiation, make the first triode VT1 cut-off, thereby audio integrated chip IC does not work because power circuit is cut off, correspondingly not sounding of loudspeaker BY.
Claims (1)
1. a theft-proof alarm for valuable articles, it is characterized in that: comprise battery, switch, the first triode, the second triode, photoresistance, loudspeaker, the first resistance, the second resistance, the 3rd resistance, electric capacity and audio integrated chip, the positive pole of described battery is connected with the first end of described switch, the second end of described switch is connected with the collector of described the first triode and the first end of described photoresistance respectively, the second end of described photoresistance is connected with the base stage of described the first triode, the emitter of described the first triode respectively with the first end of described the first resistance, the first end of described electric capacity is connected with the power end of described audio integrated chip, the second end of described the first resistance is connected with the first end of described loudspeaker, the second end of described loudspeaker is connected with the collector of described the second triode, the base stage of described the second triode is connected with the first end of described the 3rd resistance, the second end of described the 3rd resistance is connected with the output terminal of described audio integrated chip, the emitter of described the second triode respectively with the earth terminal of described audio integrated chip, the second end of described electric capacity and the negative pole of described battery are connected, the first end of described the second resistance is connected with the first crystal oscillator end of described audio integrated chip, the second end of described the second resistance is connected with the second crystal oscillator end of described audio integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320723443.4U CN203562062U (en) | 2013-11-15 | 2013-11-15 | Burglar alarm for valuables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320723443.4U CN203562062U (en) | 2013-11-15 | 2013-11-15 | Burglar alarm for valuables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203562062U true CN203562062U (en) | 2014-04-23 |
Family
ID=50511767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320723443.4U Expired - Fee Related CN203562062U (en) | 2013-11-15 | 2013-11-15 | Burglar alarm for valuables |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203562062U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448087A (en) * | 2016-10-13 | 2017-02-22 | 合肥拓发信息科技有限公司 | Electronic product with integration of illumination intensity prompting function |
| CN107895449A (en) * | 2017-11-22 | 2018-04-10 | 奕铭（大连）科技发展有限公司 | Home-use anti-theft warning circuit |
| CN107978112A (en) * | 2017-12-22 | 2018-05-01 | 重庆晨升科技有限公司 | Lacquer craftwork with anti-theft feature |
| CN109949526A (en) * | 2017-12-20 | 2019-06-28 | 上海箱箱物流科技有限公司 | Physical distribution apparatus and its tamper discharging method |
-
2013
- 2013-11-15 CN CN201320723443.4U patent/CN203562062U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448087A (en) * | 2016-10-13 | 2017-02-22 | 合肥拓发信息科技有限公司 | Electronic product with integration of illumination intensity prompting function |
| CN107895449A (en) * | 2017-11-22 | 2018-04-10 | 奕铭（大连）科技发展有限公司 | Home-use anti-theft warning circuit |
| CN109949526A (en) * | 2017-12-20 | 2019-06-28 | 上海箱箱物流科技有限公司 | Physical distribution apparatus and its tamper discharging method |
| CN109949526B (en) * | 2017-12-20 | 2023-11-03 | 上海箱箱物流科技有限公司 | Logistics appliance and anti-disassembly method thereof |
| CN107978112A (en) * | 2017-12-22 | 2018-05-01 | 重庆晨升科技有限公司 | Lacquer craftwork with anti-theft feature |
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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: 20140423 Termination date: 20141115 |
|
| EXPY | Termination of patent right or utility model |