CN2205085Y

CN2205085Y - Telephone alarm against illegal use

Info

Publication number: CN2205085Y
Application number: CN 94240709
Authority: CN
Inventors: 赵广
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-09
Filing date: 1994-06-09
Publication date: 1995-08-09
Anticipated expiration: 2004-06-09

Abstract

The utility model provides a telephone alarm against illegal use, belonging to an anti-theft alarming device of telecommunication lines. The utility model aims to provides a telephone alarm against illegal use which supplies power with batteries, and has the advantages of small volume, low power consumption, no need of discrimination of the telephone polarities and easy use. The utility model is characterized in that the batteries and a circuit board which is composed of electronic elements are installed in a shell body; a monitoring circuit, a sound alarm circuit, a light alarm circuit, a light alarm resetting circuit and a battery testing circuit are arranged in the circuit board.

Description

Telephone alarm against illegal use

The utility model relates to the burglar alarm of telecommunication line, especially phone is usurped alarm.

At present along with the development of telecommunications industry, phone stolen problem on the networking has appearred in the increase of phone installation rate.For preventing fraudulent use of telephone, people propose some alarming technical schemes that prevent that phone is stolen on the line, and No. 93231205.5 patents wherein open by Patent Office of the People's Republic of China and that authorize are exactly a practical scheme.But this scheme but exists circuit power consumption big, must use electric main to power behind step-down rectifier, and complex structure, volume are also big, and the wiring polarity of personal phone is also had fixing requirement, therefore, uses also problems such as inconvenience.

The purpose of this utility model is exactly at the existing in prior technology deficiency, and provide a kind of circuit power consumption little, and be power supply with battery, volume simple in structure is little, to the nonpolarity requirement of connection of personal phone, the phone that is more convenient for using is usurped the technical scheme of alarm.

For ease of understanding technical characterictic of the present utility model, existing in conjunction with a specific embodiment and accompanying drawing thereof, describe the content of the technical program in detail.Phone usurp alarm mainly by housing 1, electronic device and be connected the lead-in wire form, the characteristics of this programme are to have buzzer window 2 and correspondence is being fixed buzzer M on the facing the wall and meditating of housing 1, and have alarm lamp hole 3 interpolation light-emitting diode D1 and Battery Indicator Light hole 4 interpolation light-emitting diode D2; On the sidewall of housing 1, have telecommunication network route incoming line and two lead outlet 8 of personal phone wiring again, the wiring board support 9 of fixing circuit board 5 and the battery carrier 7 of self-contained battery 6 are arranged in housing 1.On described wiring board 5, form observation circuit, acoustic alarm and optical alarm circuit, light ann reset circuit and battery detection circuit by electronic device; Described observation circuit is the input N1 and a and b end corresponding be connected of N2 with a rectification bridge circuit Z of telecommunication network route, the negative terminal Z-of bridge circuit connects the negative pole of battery 6, the anode Z+ of bridge circuit connects 2 pin of integrated circuit I2 through

resistance R

1, and 2 pin connect the negative pole of battery 6 again through resistance R 4 and capacitor C 2 simultaneously; Described sound alarm circuit is the base stage that is met triode Q4 by 3 pin of integrated circuit I2, the collector electrode of triode Q4 connects the positive pole of battery 6 and its emitter-base bandgap grading connects the emitter-base bandgap grading of triode Q2 meets triode Q1 simultaneously through resistance R 5 base stage, this base stage connects the collector electrode of triode Q2 and the end of buzzer M through capacitor C 4, the negative pole of another termination battery 6 of buzzer M, and the emitter-base bandgap grading of triode Q1 connects the base stage of its collector connecting transistor of negative pole Q2 of battery 6; Described optical alarm circuit is that 10 pin by integrated circuit I2 connect the base stage of triode Q3 and its collector electrode connects the positive pole of battery 6, penetrates the anode of base through resistance R 6 sending and receiving optical diode D1, and the negative terminal of light-emitting diode D1 connects the negative pole of battery 6; Described smooth ann reset circuit is 2 and 3 pin that personal phone contact U2 meets integrated circuit I1, and 5 and 7 pin of this integrated circuit I1 connect 8 pin of integrated circuit I2 through resistance R 3, and 6 and 8 pin of integrated circuit I1 connect the positive pole of battery 6; Described battery detection circuit is the anodal other end of resistance R 7 one termination batteries 6 connects battery 6 through potentiometer W and capacitor C 5 a negative pole, the moving point of potentiometer W connects the base stage of triode Q5, the emitter-base bandgap grading of triode Q5 connects the negative pole of battery 6, and the base stage of collector connecting transistor Q6 connects the positive pole of battery 6 simultaneously through resistance R 8, the emitter-base bandgap grading of triode Q6 connects the negative pole of battery 6, and the negative terminal of collector electrode sending and receiving optical diode D2, the anode of D2 connects the positive pole of battery 6 through resistance R 9; Personal in addition phone contact U1 is connected with communication network contact N2; And 1 being connected of communication network contact N1 and integrated circuit I1 with 4 pin.The integrated circuit I1 that is adopted in this programme is two photoelectrical coupler TLP521-2 integrated packages, and its photodiode is connected into the form of full-wave rectification, and two optoelectronic switch pipes and connecing.What the integrated circuit I2 in the circuit adopted is four nor gate 4001 integrated packages, only use three NOR gate wherein,

4,5,6 and 10,9,8 liang of NOR gate of pin are connected into a R-S trigger, being about to pin 4 is connected with 9,10 are connected with 6, pin 8 is output for R end pin 2 for S end pin 10, and in addition the NOR gate output pin 3 of

1,2,3 being held with the S of trigger is that pin 5 is connected.In addition, the resistance of two resistance R 1 of this circuit, R4 and a potentiometer W is very important, and they are that R1 is 5.1 megohms, and R4 is 1 megohm, and W is 10 kilohms.Promptly constitute phone provided by the utility model by above-mentioned technical characterictic and usurped alarm.

The operation principle of existing combined circuit illustrates the function of the technical program and proves its effect thus.When the private telephone on-hook, voltage between telecommunication network route input N1 and N2 is about 50 volts, give pin 2 one high potentials of integrated circuit I2 through bridge circuit Z and resistance R 1 and R4 dividing potential drop, the pin 3 output electronegative potentials of I2 then make triode Q4 by buzzer M does not have and pipes so triode Q1 and Q2 do not work; Make the R-S trigger of the integrated circuit I2 pin 10 output electronegative potentials that do not overturn simultaneously, so triode Q3 ends the not luminous unglazed warning of light-emitting diode D1.Usurp phone and connect when usurping when this moment, voltage between N1 and the N2 is reduced to about 6 volts, then give pin 2 one electronegative potentials of integrated circuit I2 through R1 and R4 dividing potential drop, and private telephone on-hook this moment, 5,7 pin of integrated circuit I1 are also located electronegative potential, so 1 pin of integrated circuit I2 is an electronegative potential, making NOR gate output high potential is the base stage of the 3 pin output high potential of integrated circuit I2 to triode Q4, the Q4 conducting, Q1 and Q2 work vibration, buzzer M pipes and sends acoustic alarm; The pin of the R-S trigger of integrated circuit I2 upset simultaneously 10 output high potentials are given the base stage of triode Q3, and D1 is luminous for Q3 conducting light-emitting diode, reports to the police to bright dipping.When usurping the machine on-hook, 2 one-tenth high potentials of the pin of integrated circuit I2,3 pin become electronegative potential, and triode Q4 is ended, and buzzer M stops ring, and pin 10 is still for high potential but the trigger of I2 does not overturn, so light-emitting diode D1 continues luminous warning, are used for the once stolen mistake of circuit.Integrated circuit I1 conducting pin 5,7 is defeated by integrated circuit I2 pin 8 for high potential and is made 10 one-tenth electronegative potentials of trigger upset pin when using by oneself receiver off-book, triode Q3 is extinguished by light-emitting diode D1 reset.Personal phone contact U2 is connected with contact U1 with rectifier bridge Z two loops through the full-wave rectification of integrated circuit I1, and the purpose that adopts two full-wave rectification loops is not consider the polarity of phone when phone is used by oneself in connection, extremely easy to use to the user.Because this programme is to adopt powered battery, so be provided with battery detection circuit, at cell voltage just often, set the Q5 conducting by the base stage of triode Q5 by potentiometer W, and Q6 ends, light-emitting diode D2 is unglazed; When reducing at cell voltage to a certain degree the time, Q5 then by and make the Q6 conducting, light-emitting diode D2 is luminous to inform that battery needs to change.Owing to the low energy-consumption electronic device that is of this circuit employing, thus also extremely faint to battery consumption, need not often to change battery.By the working condition of foregoing circuit as can be seen, actual effect of the present utility model is conspicuous.

Description of drawings:

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is that the A-A of Fig. 1 is to cross-sectional schematic;

Fig. 3 is the control circuit figure of the utility model embodiment.

In the technical scheme content, introduced as for specific embodiment and to have repeated no more.

Claims

1, phone usurp alarm mainly by housing, electronic device and be connected the lead-in wire form, feature of the present utility model be

1.1. have buzzer window [2], alarm lamp hole [3] and Battery Indicator Light hole [4] on the facing the wall and meditating of housing [1], exist again

1.1.1. have two lead outlet [8] on the sidewall of housing [1],

1.1.2. the wiring board support [9] of fixing circuit board [5] is arranged in the housing [1], and the battery carrier [7] of self-contained battery [6]; Described

1.2. going up, wiring board [5] forms observation circuit, acoustic alarm and optical alarm circuit, light ann reset circuit and battery detection circuit by electronic device; Described

1.2.1. being the input N1 of telecommunication network route, observation circuit is connected with the b end with a of a rectification bridge circuit Z with N2, the negative terminal Z-of bridge circuit connects the negative pole of battery [6], the anode Z+ of bridge circuit connects 2 pin of integrated circuit I2 through resistance R 1, and 2 pin connect the negative pole of battery [6] again through resistance R 4 and capacitor C 2 simultaneously; Described

1.2.2. sound alarm circuit is the base stage that is met triode Q4 by 3 pin of integrated circuit I2, the collector electrode of triode Q4 connects the positive pole of battery [6] and its emitter-base bandgap grading connects the emitter-base bandgap grading of triode Q2 meets triode Q1 simultaneously through resistance R 5 base stage, this base stage connects the collector electrode of triode Q2 and the end of buzzer M through capacitor C 4, the negative pole of another termination battery [6] of buzzer M, and the emitter-base bandgap grading of triode Q1 connects the base stage of its collector connecting transistor of negative pole Q2 of battery [6]; Described

1.2.3. optical alarm circuit is 10 pin by integrated circuit I2 connects the base stage of triode Q3 and its collector electrode connects the positive pole of battery [6], penetrates the anode of base through resistance R 6 sending and receiving optical diode D1, the negative terminal of light-emitting diode D1 connects the negative pole of battery [6]; Described

1.2.4. light ann reset circuit is 2 and 3 pin that personal phone contact U2 meets integrated circuit I1,5 and 7 pin of this integrated circuit I1 connect 8 pin of integrated circuit I2 through resistance R 3, and 6 and 8 pin of integrated circuit I1 connect the positive pole of battery [6]; Described

1.2.5. battery detection circuit is the anodal other end of resistance R 7 one termination batteries [6] connects battery [6] through potentiometer W and capacitor C 5 a negative pole, the moving point of potentiometer W connects the base stage of triode Q5, the base stage of triode Q5, the emitter-base bandgap grading of triode Q5 connects the negative pole of battery [6], and the base stage of collector connecting transistor Q6 connects the positive pole of battery [6] simultaneously through resistance R 8, the emitter-base bandgap grading of triode Q6 connects the negative pole of battery [6], and the negative terminal of collector electrode sending and receiving optical diode D2, the anode of D2 connects the positive pole of battery [6] through resistance R 9; In addition

1.3. personal phone contact U1 is connected with communication network contact N2; And

1.4. communication network contact N1 is connected with 4 pin with 1 of integrated circuit I1 again.

2,, it is characterized in that described integrated circuit I1 is two photoelectrical coupler TLP521-2 according to the described alarm of claim 1.

3,, it is characterized in that described integrated circuit I2 is a four nor gate integrated circuit 4001 according to the described alarm of claim 1.

4, according to the described alarm of claim 1, the resistance that it is characterized in that described resistance R 1 is 5.1 megohms, and the resistance of resistance R 4 is 1 megohm.

5, according to the described alarm of claim 1, the resistance that it is characterized in that described potentiometer W is 10 kilohms.