CN202396650U

CN202396650U - Anti-theft early warning device for wallet

Info

Publication number: CN202396650U
Application number: CN2012200116907U
Authority: CN
Inventors: 王寅寅; 何林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-03
Filing date: 2012-01-03
Publication date: 2012-08-29
Anticipated expiration: 2022-01-03

Abstract

The utility model relates to an anti-theft early warning device for a wallet. The early warning device comprises a 3V direct current power supply, a light control circuit and an analog sound generation circuit, wherein the analog sound generation integrated circuit IC1 adopts the type of LCW06-2. The circuit of the early warning device is of a light control warning device substantially, and the early warning device is placed into a handbag of a woman, and the occurrence of events of stealing the wallet or valuables in the handbag can be effectively avoided. As long as the handbag is opened by a person, the early warning device can immediately emit siren sound with high loudness and play a great role in deterring and threatening thieves under the condition that a certain light or lamplight and the like exists around an environment where a person lifting the handbag is located.

Description

The wallet anti-theft prewarning apparatus

Technical field

The utility model belongs to electronic technology and technical field of security and protection, is about a kind of wallet anti-theft prewarning apparatus.

Background technology

Wallet in woman's the handbag in tourist attractions, the stolen incidents in public place such as bus, store often take place, light then mood that influence is done shopping or played, weight losses is then most irredeemable.This prior-warning device comes down to a light control alarm device, prior-warning device is put in woman's the handbag, can stop the incident of interior wallet of stealing handbag or valuables to take place effectively.As long as the residing environment of bag people has certain light or has under the condition such as light, in case when having the people to open handbag, prior-warning device just can send the police whistle sound of high loudness immediately, can play good deterrence and threatening effect to the burglar.

Below specify this wallet anti-theft prewarning apparatus involved relevant technologies in implementation process.

The utility model content

Goal of the invention and beneficial effect: the circuit of this prior-warning device comes down to a light control alarm device, prior-warning device is put in woman's the handbag, can stop the incident of interior wallet of stealing handbag or valuables to take place effectively.As long as the residing environment of bag people has certain light or has under the condition such as light, in case when having the people to open handbag, prior-warning device just can send the police whistle sound of high loudness immediately, can play good deterrence and threatening effect to the burglar.

The circuit working principle: the wallet anti-theft prewarning apparatus is formed simulation police whistle sound sound generator by analog audio generation IC 1 with resistance R 1, electrochemical capacitor C1, loudspeaker YA, and photo resistance RG and NPN transistor VT1, resistance R 2 are formed light-operated switch.Handbag is not opened at ordinary times; Under the condition of unglazed photograph, the photo resistance RG in the circuit is high resistance, resistance value >=1M Ω; NPN transistor VT1 is in cut-off state; Analog audio generation IC 1 no electricity is not worked, and loudspeaker YA is sounding not, surveys the static power consumption electric current of complete machine＜6 μ A this moment.When handbag is opened by the people; Light shines on the photo resistance RG; The resistance value of photo resistance RG is reduced to about 10k Ω immediately; NPN transistor VT1 gets into conducting state at once, and analog audio generation IC 1 must be established beginning work by cable, and loudspeaker YA just can send the police whistle sound of high loudness " toot～".

Resistance R 1 is external oscillation resistance in the circuit, increases and decreases the tone that its resistance can change police whistle sound; Resistance R 2 is the leakage current of complete machine when effectively reducing static state; The interchange internal resistance of analog audio generation IC 1 working power when electrochemical capacitor C1 is used for eliminating the prior-warning device circuit turn-on help eliminating because of 3V dc source voltage descends and utter long and high-pitched sounds when internal resistance becomes big, so electrochemical capacitor C1 can not be omitted.

Technical scheme: the wallet anti-theft prewarning apparatus, form by 3V dc source, light-operated circuit, analog audio generation circuit, it is characterized in that:

Light-operated circuit: form by photo resistance RG, NPN transistor VT1, resistance R 2; The anodal VCC of the end of photo resistance RG and the colelctor electrode connection circuit of NPN transistor VT1; The base stage of another termination NPN transistor VT1 of photo resistance RG and an end of resistance R 2, the other end connection circuit ground GND of resistance R 2;

Analog audio generation circuit: form by analog audio generation IC 1, resistance R 1, loudspeaker YA and electrochemical capacitor C1; The model that analog audio generation IC 1 adopts is LCW06-2; 5 pin of analog audio generation IC 1 connect the emitter stage of NPN transistor VT1 and the positive pole of electrochemical capacitor C1; 3 pin connection circuit ground GND of the negative pole of electrochemical capacitor C1 and analog audio generation IC 1; 4 pin of analog audio generation IC 1 connect the end of loudspeaker YA, the emitter stage of another termination NPN transistor VT1 of loudspeaker YA.

The anodal VCC of the anodal connection circuit of 3V dc source links to each other 3V dc power cathode connection circuit ground GND.

Description of drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a wallet anti-theft prewarning apparatus; The negative pole of the 3V dc source in accompanying drawing 1 is circuit ground GND.

The specific embodiment

Circuit working schematic diagram and description of drawings according to wallet anti-theft prewarning apparatus shown in the accompanying drawing 1; And according to the annexation between the components and parts in the described each several part circuit of utility model content, and the components and parts technical parameter described in the embodiment requires to implement to realize the utility model.

The selection of components and parts and technical parameter thereof

IC1 is an analog audio generation integrated circuit, requires to select 3 simulated sound warning integrated circuits for use, and its model is LCW06-2; It adopts biserial 8 pin straight cutting Plastic Package; Can produce 3 kinds of different simulation alarm sounds, inner integrated power amplifier can directly drive low-resistance loudspeaker sounding; 1 pin of analog

audio generation IC

1 and 2 pin are external oscillation resistance, and the resistance of increase and decrease outer meeting resistance can change the sounding tone; Its 3 pin connects dc power cathode; 4 pin are audio output; 5 pin connect dc power anode; 6 pin and 7 pin are empty pin; 8 pin are sound collecting end; When 8 pin " unsettled " of IC1, can produce simulation police car electric whistle sound; When 8 pin connect dc power anode, can produce simulation fire fighting truck electric whistle sound; When 8 pin connect dc power cathode, can produce simulation ambulance electric whistle sound; The major parameter of LCW06-2: operating voltage range 3～4.5V, operating current＜150 μ A, maximum output current can reach 150mA;

VT1 is a NPN transistor, can select power transistor in 2SC9013 or the NPN types such as 3DG12,3DX201 for use, requires multiplication factor β＞120;

RG is photo resistance, can select the photo resistance of MG44-03 type resin-encapsulated for use, its light resistance≤5k Ω, dark resistance>=1M Ω;

Resistance is used the RTX-1/8W fixed carbon resister, and the resistance of resistance R 1, R2 is respectively 220K Ω, 30K Ω;

C1 is with CD11-10V type electrochemical capacitor, and capacity is 100 μ F;

Loudspeaker YA can use YD58-1 type 8 Ω, 0.25W dynamic speaker;

The voltage of dc source is 3V, and No. 7 batteries of available 2 joints are composed in series.

Circuit production main points and use

In when welding, the electric iron shell must the good earth line, in order to avoid the device of the induction of the alternating current on electric iron voltage breakdown CMOS IC interior at components and parts;

The good circuit board of welding is packed into together with loudspeaker YA, battery case in the suitable small plastic box of volume, opens a louver in the appropriate location of plastics box panel for loudspeaker YA.In the good position perforate of plastics box panel sensitization and fix photo resistance RG;

The circuit of prior-warning device need not carry out any debugging and get final product operate as normal.This prior-warning device must be installed 1 DC power supply switch in the handbag concealed location; In time spent not at ordinary times, work as the dc source of closing prior-warning device, when getting into crowded public place; Should open the power switch of this prior-warning device in advance, make prior-warning device be in the standby alert status all the time.

Claims

1. a wallet anti-theft prewarning apparatus is made up of 3V dc source, light-operated circuit, analog audio generation circuit, it is characterized in that:

Light-operated circuit is made up of photo resistance RG, NPN transistor VT1, resistance R 2; The anodal VCC of the end of photo resistance RG and the colelctor electrode connection circuit of NPN transistor VT1; The base stage of another termination NPN transistor VT1 of photo resistance RG and an end of resistance R 2, the other end connection circuit ground GND of resistance R 2;

Analog audio generation circuit is made up of analog audio generation IC 1, resistance R 1, loudspeaker YA and electrochemical capacitor C1; The model that analog audio generation IC 1 adopts is LCW06-2; 5 pin of analog audio generation IC 1 connect the emitter stage of NPN transistor VT1 and the positive pole of electrochemical capacitor C1; 3 pin connection circuit ground GND of the negative pole of electrochemical capacitor C1 and analog audio generation IC 1; 4 pin of analog audio generation IC 1 connect the end of loudspeaker YA, the emitter stage of another termination NPN transistor VT1 of loudspeaker YA.

2. wallet anti-theft prewarning apparatus according to claim 1 is characterized in that: the anodal VCC of the anodal connection circuit of 3V dc source links to each other 3V dc power cathode connection circuit ground GND.