CN2305814Y - Arrangement for preventing unauthorised use or fraudulent use for telephone - Google Patents

Abstract

The utility model relates to an arrangement for preventing unauthorized use or fraudulent use for telephones. The utility model is additionally provided with a remember displaying and eliminating circuit 3 on the basis of a theft preventing sample circuit 1 and an acoustic-optic alarm circuit 2, comprising an element bridge 1, a voltage stabilizing tube DW, triodes BG< 1 >, BG< 2 >, BG< 3 > and BG< 4 >, an LED< 1 > reset switch JK, a controlled silicon SCR, a luminous tube LED< 2 > and diodes D< 1 > and D< 2 >. When telephone theft occurs, the foot 1 of an integrated block CK9651 can output an alarm signal with high level to conduct the BG< 4 >, the luminous tube LED< 1 > radiates and a buzzer Y alarms, and simultaneously, the foot 2 of the CK9651 output a signal to trigger and conduct the controlled silicon SCR through the D< 2 >; the luminous tube LED< 2 > radiates and display memory. The utility model has the advantages of simple structure and reliable performance.

Description

Device for anti-fraudulent use telephone line

Device for anti-fraudulent use telephone line relates to the device that prevents outside line phone combined with other handset and illegally used.

The Device for anti-fraudulent use telephone line of prior art comprises antitheft sample circuit, sound light alarming circuit, when outside line has phone combined with other handset and illegally used, and antitheft sample circuit work, sound light alarming circuit sends sound and light alarm.Its shortcoming is: when user's nobody home, even alarm have ever made warning, the phone that also is unable to find out oneself when owner goes home is attempted free call on sb. else's expense through illegal means by the people.

The purpose of this utility model is to provide a kind of Device for anti-fraudulent use telephone line, this Device for anti-fraudulent use telephone line has anti-free call on sb. else's expense through illegal means memory Presentation Function, when this phone has the people to attempt at outside line phone combined with other handset and illegally used, can report to the police, and can after stop, the free call on sb. else's expense through illegal means behavior still show people's free call on sb. else's expense through illegal means and cross phone.Simple in structure, reliable in quality.

Characteristics of the present utility model are as follows:

Antitheft sample circuit connects outside line, and sound light alarming circuit 2 is taken over control and stolen sample circuit 1, and memory shows and elimination circuit 3 connects sound light alarming circuit 2.

When the outside line of this phone has people's phone combined with other handset and illegally used, antitheft sample circuit 1 is delivered to sound light alarming circuit 2 with sample of signal and is sent sound and light alarm, memory simultaneously shows and eliminates circuit demonstration phone by people's free call on sb. else's expense through illegal means, after free call on sb. else's expense through illegal means stops, memory shows and the elimination circuit still shows the free call on sb. else's expense through illegal means signal, after owner goes home, know this phone by people's free call on sb. else's expense through illegal means, the free call on sb. else's expense through illegal means signal is eliminated.

Description of drawings:

Fig. 1, the utility model Device for anti-fraudulent use telephone line theory diagram.

Fig. 2, the circuit theory diagrams of the utility model Device for anti-fraudulent use telephone line embodiment.

Referring to Fig. 1, Device for anti-fraudulent use telephone line of the present utility model has increased the memory demonstration and has eliminated circuit 3 than prior art, and it comprises: antitheft sample circuit 1 connects outside line, sound light alarming circuit 2 is taken over control and is stolen warning circuit 1, and memory shows and elimination circuit 3 connects sound light alarming circuit 2.

Referring to Fig. 2

Antitheft sample circuit comprises: first bridge 1, voltage-stabiliser tube DW, triode BG ₁And peripheral cell; Sound light alarming circuit comprises triode BG ₂, BG ₃, BG ₄, integrated package CK9651, luminous tube LED ₁, buzzer Y and peripheral cell; Memory shows and elimination circuit 3 comprises controllable silicon SCR, luminous tube LED ₂, reset switch JK and peripheral cell thereof.Unit's bridge 2 and optocoupler pipe P521 are this telephone control circuit.

Embodiment: see Fig. 2

Outside line L ₁, L ₂Connect first bridge 1 input, first bridge 1 output cathode R in parallel ₁Upper end, R ₃Upper end, capacitor C ₃Anodal, R ₄Upper end, R ₆Upper end, LED ₁Anodal, C ₅Anodal; Unit's bridge 1 output negative pole R in parallel ₂Lower end, C ₁Lower end, BG ₁Emitter, C ₂Lower end, P521 the 3rd pin, BG ₂Emitter, R ₇Lower end, CK9651 negative pole, R ₉The lower end; Resistance R ₁Following termination voltage-stabiliser tube DW negative pole, the anodal BG in parallel of DW ₁Base stage, R ₂Upper end and C ₁The upper end; R ₃Lower end BG in parallel ₁Collector electrode, C ₂Upper end, optocoupler pipe P521 export 4 pin, C ₃Negative pole and BG ₂Base stage, R ₄Lower end BG in parallel ₁Collector electrode, R ₅Left end, R ₅Right-hand member meets BG ₃Base stage, R ₆Following termination BG ₃Emitter, BG ₃Collector electrode meets CK9651 positive pole, R ₇1 pin of last termination CK9651, LED ₁Negative pole meets buzzer Y, and buzzer Y meets BG ₄Collector electrode and C ₅Negative pole, R ₈Left end meets R ₇The upper end, R ₈Right-hand member meets BG ₄Base stage, BG ₄Emitter meets R ₉The upper end.

Memory shows and eliminates circuit 3 and comprises:

The 2 pin parallel diode D of integrated package CK9651 ₂Positive pole and C ₄The upper end, C ₄First bridge 1 output negative pole of following termination, D ₂Negative pole meets the controllable silicon SCR control utmost point, SCR negative electrode sending and receiving light pipe LED ₂Positive pole, LED ₂Negative pole first bridge 1 output negative pole in parallel and C ₆The lower end, SCR anode C in parallel ₆Anodal, diode D ₁Negative pole, switch JK are gone up termination unit bridge 1 output cathode, JK lower end series connection R ₁₀After meet D ₁Anodal.Unit's bridge 2 input termination outside line L ₂, outside line L ₁Connect this telephone set, another termination unit bridge 2 inputs of this telephone set.1 pin, 2 pin of unit's bridge 2 output termination optocoupler pipe P521.

BG ₁, BG ₂, BG ₄Select 5551 models, BG for use ₃Select 5401 models for use, D ₁Select 4007 models for use, D ₂Select 4148 models for use, SCR selects 1A/600v for use.

Circuit theory is as follows:

1. during the main frame on-hook, circuit is in holding state, and outer circuit voltage is generally 40～60V, and first bridge 1 will be exported behind the signal rectification, because of the voltage stabilizing value of DW is 21V, and DW reverse breakdown, R1, R2 dividing potential drop, BG ₁Conducting, BG ₂Base voltage is zero to end BG ₃End, CK9651 does not work, BG ₄By, LED ₁Do not work, Y sounding not, D ₂Not conducting, SCR is obstructed.LED ₂Do not work.

2. when this machine used, line voltage distribution dropped to 8～12V, and first bridge 2 is to optocoupler pipe P521 power supply, 3, the 4 pin conductings of P521, BG ₂Base potential is 0, BG ₂By, BG ₃, CK9651, BG ₄, SCR etc. do not work, no acousto-optic is reported to the police and memory shows, transmission signals directly import this telephone set by first bridge 2, and this telephone set conversation nothing is influenced.

3. when phone was incorporated outside line and off-hook into, outer circuit voltage drop was 8～12V, and first bridge 1 is with the output of free call on sb. else's expense through illegal means signal rectification, and because of current potential is lower than DW voltage stabilizing value, DW ends, BG ₁By, BG ₂Because of base potential rising conducting, BG ₃Because of base potential reduces, and conducting, CK9651 gets, and 1 pin electric, CK9651 is exported the alarm signal of high level, BG ₄Conducting, LED ₁Luminous, buzzer Y sends chimes of doom, and simultaneously, this alarm signal feeds back to outside line by first bridge 1, makes the speech transmitter alarm of robber's machine several, steals the hitter and can't carry out normal talking; The 2 pin output signals of while CK9651 are through D ₂Reach the controllable silicon SCR control utmost point, SCR is subjected to triggering and conducting, luminous tube LED ₂Conducting is luminous.

When the free call on sb. else's expense through illegal means signal terminating, the free call on sb. else's expense through illegal means blackout, outside line voltage returns to 40～60V, and DW punctures, BG ₁Conducting, BG ₂Base voltage becomes 0, BG ₂By, BG ₃Base potential raises, BG ₃There are not electricity, BG by, CK9651 ₄End, controllable silicon SCR is ended, LED ₁, Y outage, the free call on sb. else's expense through illegal means phone disturbed stop, this moment, controllable silicon did not cut off the power supply LED ₂Continue luminously, indicate this machine by outside line mistake combined with other handset and illegally used.House-owner clicks reset switch JK, makes its outage LED ₂Extinguish.

Claims (3)

1. Device for anti-fraudulent use telephone line comprises: antitheft sample circuit 1 connects outside line, and sound light alarming circuit 2 is taken over control and stolen warning circuit 1, it is characterized in that: memory shows and elimination circuit 3 connects sound light alarming circuit 2.

2. according to the Device for anti-fraudulent use telephone line of claim 1, it is characterized in that:

Outside line L ₁, L ₂Connect first bridge 1 input, first bridge 1 output cathode R in parallel ₁Upper end, R ₃Upper end, capacitor C ₃Anodal, R ₄Upper end, R ₆Upper end, LED ₁Anodal, C ₅Anodal; Unit's bridge 1 output negative pole R in parallel ₂Lower end, C ₁Lower end, BG ₁Emitter, C ₂Lower end, P521 the 3rd pin, BG ₂Emitter, R ₇Lower end, CK9651 negative pole, R ₉The lower end; Resistance R ₁Following termination voltage-stabiliser tube DW negative pole, the anodal BG in parallel of DW ₁Base stage, R ₂Upper end and C ₁The upper end; R ₃Lower end BG in parallel ₁Collector electrode, C ₂Upper end, optocoupler pipe P521 export 4 pin, C ₃Negative pole and BG ₂Base stage, R ₄Lower end BG in parallel ₁Collector electrode, R ₅Left end, R ₅Right-hand member meets BG ₃Base stage, R ₆Following termination BG ₃Emitter, BG ₃Collector electrode meets CK9651 positive pole, R ₇1 pin of last termination CK9651, LED ₁Negative pole meets buzzer Y, and buzzer Y meets BG ₄Collector electrode and C ₅Negative pole, R ₈Left end meets R ₇The upper end, R ₈Right-hand member meets BG ₄Base stage, BG ₄Emitter meets R ₉The upper end;

Memory shows and eliminates circuit 3 and comprises:

The 2 pin parallel diode D of integrated package CK9651 ₂Positive pole and C ₄The upper end, C ₄First bridge 1 output negative pole of following termination, D ₂Negative pole meets the controllable silicon SCR control utmost point, SCR negative electrode sending and receiving light pipe LED ₂Positive pole, LED ₂Negative pole first bridge 1 output negative pole in parallel and C ₆The lower end, SCR anode C in parallel ₆Anodal, diode D ₁Negative pole, switch JK are gone up termination unit bridge 1 output cathode, JK lower end series connection R ₁₀After meet D ₁Positive pole, first bridge 2 input termination outside line L ₂, outside line L ₁Connect this telephone set, another termination unit bridge 2 inputs of this telephone set, 1 pin, 2 pin of first bridge 2 output termination optocoupler pipe P521.

3. according to the Device for anti-fraudulent use telephone line of claim 2, it is characterized in that: BG ₁, BG ₂, BG ₄Select 5551 models, BG for use ₃Select 5401 models for use, D ₁Select 4007 models for use, D ₂Select 4148 models for use, SCR selects 1A/600v for use.