CN2307318Y - Theft-proof alarm device - Google Patents
Theft-proof alarm device Download PDFInfo
- Publication number
- CN2307318Y CN2307318Y CN 97232567 CN97232567U CN2307318Y CN 2307318 Y CN2307318 Y CN 2307318Y CN 97232567 CN97232567 CN 97232567 CN 97232567 U CN97232567 U CN 97232567U CN 2307318 Y CN2307318 Y CN 2307318Y
- Authority
- CN
- China
- Prior art keywords
- lead
- window
- door
- integrated circuit
- circuit
- 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
Links
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Abstract
The utility model relates to an anti-theft alarm, composed of an integrated circuit board, transistors, resistors, a horn, a power supply and conducting wires of a switch. The integrated circuit board, the four transistors, the horn, the five resistors, two 1.5V batteries and a power supply switch are installed and welded in a small-scale casing; three conducting wires are externally connected with the outside of the casing, wherein, the terminal end of number 3 conducting wire is isolated both ends of each of the resistors and is connected with number 1 conducting wire by short to be installed on one side of a protected object; number 2 conducting wire is installed on the other side. When alarms are needed, a door or a window is closed and the terminal end of each of the three conducting wires is connected together; therefore, when the door or the window is provided with damage, alarms can be realized in time despite of broken circuit or short circuit.
Description
The utility model belongs to a kind of burglar alarm.
The burglar alarm of upper reaches, market enforcement usefulness has a variety of, particularly utilizes the anti-theft device on door and window, does not cost an arm and a leg, and complexity is installed, and is exactly that technology goes to pot simply easily, and does not have the effect of burglar alarm.And generally circuit all is two, the breaking alarming of usefulness.The robber at the circuit near-end together two lead burn-backs, end is opened again, just can not report to the police.Be badly in need of at present having a kind of install simple, practical, open circuit and short-circuit conditions under can both reach the burglar alarm of warning.
Task of the present utility model is: design a kind of promptly install simple, practical, again can be at the novel anti-theft alarm that opens circuit, can both report to the police under the short-circuit conditions.
The method that the utility model task solves is: this burglar alarm is made up of surface-mounted integrated circuit, triode, resistance, loudspeaker, power supply, switch, lead.It is to install, weld a surface-mounted integrated circuit in a compact shell; four triodes; loudspeaker; five resistance; the battery of two joint 1.5V, a power switch, housing pick out three leads; wherein 2 ends of No. 3 lead isolation resistances and No. 1 lead short circuit are installed in one side of protected object, and No. 2 lead is installed in another side.When needs are reported to the police, door or window are closed, three leads, end is connected together, like this when opening door or window, the line broken circuit alarm equipment alarm.
This burglar alarm is not have the warning effect for preventing that circuit from being destroyed by the robber on the basis of broken circuit alarmer, has added the one-level saturated circuit again by BG4, R
4, R
3Form, once the robber is with R
51 end and No. 2 line short circuits, triode BG
4The saturated integrated circuit energized that makes becomes short-circuit alarming again.Increase an isolation resistance R
5, during installation, 2 ends of No. 1 lead and No. 3 lead isolation resistances are attempted by door and window on one side, and No. 2 lead is installed in the door and window another side, and door and window is once be opened No. 1 lead and No. 2 leads disconnections, triode BG
3Saturated, power supply passes through BG
3Make integrated circuit get the electric warning effect of playing.
Accompanying drawing is an embodiment of the present utility model.
Accompanying drawing 1 is the front view of burglar alarm.
Accompanying drawing 2 is the wiring diagram of burglar alarm.
As shown in Figure 1: 1 is that No. 1 lead, 2 is that No. 2 leads, 3 are that No. 3 leads, 4 are switch for housing, 5.
As shown in Figure 2: surface-mounted integrated circuit, triode, resistance, loudspeaker, power supply, switch, lead.
Embodiment: in a plastic small outline housing 4, adorn (9561) four triodes of a surface-mounted integrated circuit (BG1, BG2, BG3, BG4), 5 resistance (R
1, R
2, R
3, R
4, R
5), one on loudspeaker, two joint 1.5V batteries, a switch 5 is drawn lead 1,2, No. 3, and this burglar alarm installation is simple, practical, antitheft power is strong.
Claims (2)
1, burglar alarm is made up of surface-mounted integrated circuit, triode, resistance, loudspeaker, power supply, switch, lead, it is characterized in that by BG4, R
5, R
3Form one-level triode saturated circuit.
2, burglar alarm according to claim 1 is characterized in that lead 3 ends have an isolation resistance that links to each other with No. 1 lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97232567 CN2307318Y (en) | 1997-04-03 | 1997-04-03 | Theft-proof alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97232567 CN2307318Y (en) | 1997-04-03 | 1997-04-03 | Theft-proof alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2307318Y true CN2307318Y (en) | 1999-02-10 |
Family
ID=33944347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97232567 Expired - Fee Related CN2307318Y (en) | 1997-04-03 | 1997-04-03 | Theft-proof alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2307318Y (en) |
-
1997
- 1997-04-03 CN CN 97232567 patent/CN2307318Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |