CN2398687Y - Self-defence alarm - Google Patents
Self-defence alarm Download PDFInfo
- Publication number
- CN2398687Y CN2398687Y CN 99249106 CN99249106U CN2398687Y CN 2398687 Y CN2398687 Y CN 2398687Y CN 99249106 CN99249106 CN 99249106 CN 99249106 U CN99249106 U CN 99249106U CN 2398687 Y CN2398687 Y CN 2398687Y
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- CN
- China
- Prior art keywords
- alarm
- utility
- model
- self
- battery
- 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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Abstract
The utility model relates to a self-defence alarm which is composed of a battery, a switch, an integrated oscillator and a loudspeaker. The utility model can emit 120dB sound-level alarm signals when the battery is 9 volt, the maximum working current can be 130 MA, and the continuous alarm time can be 1 hour. The utility model has the advantages of simple circuit, light weight, small volume, etc.
Description
The utility model relates to a kind of warning device of attack protection.
Traditional attack protection alarm can during in the face of the attack that approaches or any emergency condition, send chimes of doom at you, just can frighten the offender effectively with this, and cause people around's attention, is helped timely.The attack protection alarm of being sold in the market exists mostly that weight is heavier, volume is big and circuit deficiency such as complexity too.
The purpose of this utility model is to provide a kind of in light weight, volume is little and circuit structure is simply defended oneself alarm.
The utility model realizes that the above-mentioned purpose key is: alarm is made up of battery, K switch, integrated oscillator IC1 and loudspeaker; The battery anode is connected by the control end of K switch with described integrated oscillator IC1, the output terminal of described integrated circuit (IC) 1 is connected with the base stage of a power discharging transistor T1, be serially connected with coil L and loudspeaker between the collector of triode T1 and the positive source, the emitter of triode T1 connects power cathode.
Circuit part of the present utility model only is made up of an integrated oscillator and peripheral circuit, so circuit is simple, in light weight, volume is little.This device can produce the sound level alerting signal of 120dB when battery 9V, minimum sound level is 100dB, rated voltage 9V, and maximum operating currenbt 130mA, the continuous alarm time is 1 hour.
The drawing explanation:
Accompanying drawing is the circuit theory diagrams of self-defence alarm described in the utility model.
The utility model specific embodiment is seen accompanying drawing: the battery anode links to each other with integrated oscillator 1 end by K switch, also by capacitor C 2 and resistance R 1, R4, R5, the end of R6 is connected, described resistance R 1, R4, R5, the other end of R6 respectively with integrated oscillator 1,5,6,7 ends are connected, the other end of described resistance R 4 is also by capacitor C 3 and resistance R 2, R3 one end is connected, resistance R 2, the R3 other end respectively with 2 of integrated oscillator, 3 ends link to each other, described integrated oscillator 7 ends are connected with its 12 end by capacitor C 4,14 ends are earth terminal, 11 ends are output terminal, connect the base stage of power discharging transistor T1, the collector of triode T1 is by coil L and loudspeaker serial connection branch road, K switch is connected with the battery anode, triode T1 grounded emitter.This installs described integrated oscillator can adopt 14069 models.
The profile of this device can be rectangle or gate arch shape housing.Its size is in wide 5～6cm, long 7～8cm scope.Also can be provided with one in the one side and hang tag, so that carry.
Claims (1)
- A kind of self-defence alarm is characterized in that: alarm is made up of battery, K switch, integrated oscillator IC1 and loudspeaker; The battery anode is connected by the control end of K switch with described integrated oscillator IC1, the output terminal of described integrated circuit (IC) 1 is connected with the base stage of a power discharging transistor T1, be serially connected with coil L and loudspeaker between the collector of triode T1 and the positive source, the emitter of triode T1 connects power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99249106 CN2398687Y (en) | 1999-10-29 | 1999-10-29 | Self-defence alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99249106 CN2398687Y (en) | 1999-10-29 | 1999-10-29 | Self-defence alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2398687Y true CN2398687Y (en) | 2000-09-27 |
Family
ID=34034149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99249106 Expired - Fee Related CN2398687Y (en) | 1999-10-29 | 1999-10-29 | Self-defence alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2398687Y (en) |
-
1999
- 1999-10-29 CN CN 99249106 patent/CN2398687Y/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 |