CN2294492Y - Telephone alarm without external power - Google Patents

Abstract

The utility model relates to a telephone alarm without external power. The utility model is characterized in that polarity switching circuits D1-D4 are divided into three ways to be respectively connected with a off-hook switch 4 and pressure reducing circuits 1 and 2; a circuit 1 is connected with a dial circuit 3; a circuit 2 is connected with a triggering and self-locking circuit 6; lead-out wires 15 of the A end and the b end of an alarm 10 are connected with a telephone wire in parallel. The utility model has the advantages that the power supply of the telephone wire is used; the utility model is corresponding to normal telephone dialing at the time of work; current is almost zero at the time of static waiting; the telephone alarm without external power can be used as a corresponding alarm by matching with the other sensors; the size of the device is small; the power consumption is low; the cost is low; concealment can be easily implemented; one alarm can be provided with a plurality of trigger switches and sensors; the reliability is high.

Description

Do not need the telephone alarm of peripheral hardware power supply

People seek help to public security organ or relevant person's warning at a distance, and a very important channel passes through public telephone exactly.But when existing together a Room with the unprincipled fellow, calling warning will be restricted; Sometimes at clutch, the seeking help person can not in time report to the police owing to be nervous and may lose one's tongue.Moreover existing congenerous telephone alarm device generally all needs the peripheral hardware power supply, and not only the casing volume is big, and also need change battery at regular intervals, and circuit is more complicated also.

The purpose of this utility model provides a kind of telephone alarm that does not need the peripheral hardware power supply, and it is almost nil that its static state is waited for electric current, and volume is little, can be used as emergency alarm, fire prevention, burglar alarm etc.

This telephone alarm that does not need the peripheral hardware power supply comprises alarm housing 10, polarity switching, automatic take offing machine circuit, sound circuit, it is characterized in that trigger switch 16 is parallel to current-limiting resistance R1 two ends, connects with telephone wire; Polarity switching D1-D4 divides three the tunnel to connect off-hook electronic switch 4, reduction voltage circuit 1,2 respectively; Reduction voltage circuit 1 sending and receiving circuit 3; Signaling circuit 3 connects off-hook electronic switch 4, networking circuit 9 respectively; Reduction voltage circuit 2 contacts are from lock circuit 6; Trigger latching circuit 6 and connect oscillation frequency dividing circuit 7 and the off-hook/number of putting/redial on-off circuit 5 respectively; Oscillation frequency dividing circuit 7 contacts respectively from lock circuit 6 and sound circuit 8; Off-hook/the number of putting/heavily unplug and close circuit 5 sending and receiving circuit 3.The extension line 15 of alarm 10 is in parallel with telephone wire.

The design of this telephone alarm has reduction voltage circuit, the off-hook/number of putting/redial circuit, oscillation frequency dividing circuit, triggering latching circuit etc., utilize the power supply of telephone wire, be equivalent to normally put through phone during work, it is almost nil to wait for electric current when static, also can join, as the alarm use of corresponding function with other sensor; This device volume is little, little power consumption, and cost is low, is convenient to hiddenly, and several trigger switches, sensor can be installed on this alarm; The reliability height.

Accompanying drawing 1 is not for needing the telephone alarm housing synoptic diagram of peripheral hardware power supply:

Accompanying drawing 2 is not for needing the telephone alarm circuit block diagram of peripheral hardware power supply:

Accompanying drawing 3 is not for needing the telephone alarm circuit theory diagrams of peripheral hardware power supply:

This telephone alarm that does not need the peripheral hardware power supply, comprise alarm housing 10, polarity switching, automatic take offing machine circuit, sound circuit, it is characterized in that housing 10 is rectangular parallelepiped, there are the number of putting switch 11, microphone hole 13, recording switch 14 in the front, dial key 12 is arranged above, back side extension line 15 joins with circuit A, B end, is connected in parallel on the telephone line.Both can be on same alarm a plurality of trigger switches in parallel, also can be in the circuit of a telephone set a plurality of these alarms in parallel.Trigger switch 16 promptly is the S1 in the circuit.Trigger switch 16 is parallel to current-limiting resistance R1 two ends, connects with telephone wire; Polarity switching D1-D4 divides three the tunnel to connect off-hook electronic switch 4, reduction voltage circuit 1,2 respectively; Reduction voltage circuit 1 sending and receiving circuit 3; Signaling circuit 3 connects off-hook electronic switch 4, networking circuit 9 respectively; The X1-X4 of signaling circuit 3, Y1-Y3 link to each other with the extension line that connects key 12 respectively.The power end, other one tunnel that the power end, a tunnel that the power end, a tunnel that off-hook electronic switch 4 one tunnel is connected to signaling circuit 3 is connected to the off-hook/number of putting/redial on-off circuit 5 is connected to sound circuit 8 is connected to the Tr4 collector of networking circuit 9.Reduction voltage circuit 2 contacts are from lock circuit 6; Reduction voltage circuit 2 is made up of resistance R 3, diode D7, voltage stabilizing diode D8, is connected to the IC3 supply pin 16 of latching circuit 6; Trigger the switch Y that latching circuit 6 adopts the pin 1,10,15 among the integrated circuit CD4053 to be formed, Y output is connected to the IC4 supply pin 16 of oscillation frequency dividing circuit 7, and 2 passage Z, X switch are respectively the phase inverter of 4,13 pin output signals in the oscillation frequency dividing circuit among the IC3; 4 pin of IC3 connect the off-hook/number of putting/the redial pin 13 of on-off circuit IC2.Trigger latching circuit 6 and connect oscillation frequency dividing circuit 7 and the off-hook/number of putting/redial on-off circuit 5 respectively; Oscillation frequency dividing circuit 7 contacts respectively from lock circuit 6 and sound circuit 8; Two audio/speech are amplified, the base stage of the Tr4 of networking circuit 9 connects from 2 input OR-gate D10, D11, and wherein D10 connects spontaneous circuit 3 dual-tone multifrequency ends; D11 connects from the IC5 of voice circuit 8 playback output terminal by current-limiting resistance R14; The collector of Tr4 links to each other with the collector of Tr2, Tr3.The pin 7 of the IC4 of oscillation frequency dividing circuit 7 is connected to the IC5 playback trigger end of sound circuit 8 by negative circuit Tr5.Off-hook/the number of putting/heavily unplug and close circuit 5 sending and receiving circuit 3.The IC2 pin 9,10 of the off-hook/number of putting/redial circuit 5 is connected to by switch S 4 respectively and hangs up the pin 4 that circuit Tr6 base stage, S5 are connected to the IC1 of signaling circuit 3; The pin 11 of IC2 links to each other with the pin 18 of IC1; IC2 pin 14 connects the collector from off-hook electronic switch Tr2, Tr3.The extension line 15 of alarm 10 is in parallel with telephone wire.

The principle of work of this alarm is: during warning trigger switch 16 access failures, the 50V power supply is pulse/required operating voltage when the compatible signaling circuit IC1 of double-tone frequency provides memory by current-limiting resistance R1, polarity switching D1-D4, R2, D5, D6, C2 on the telephone wire.Triode Tr1, Tr2, Tr3 and D14 etc. are the off-hook path.The effect of triode Tr4 is at off hook state feed-in telephone line with the dual-tone multifrequency number of sending out signal and voice signal.Integrated circuit (IC) 2 is four two-way switch circuit, and by connection shown in Figure 3, when its pin 13 is noble potential and S4, S5 connection, but the analog manual operation " redials " button, makes IC1 send the telephone number of being stored.Can off-hook when S4, S5 disconnect, the number of putting, so IC2 is called " off-hook/number of putting/redial on-off circuit ".IC3 is three group of 2 tunnels analogy transmitter/splitter circuit, trigger the switch Y of the IC3 of latching circuit 6, its input is joined by capacitor C 8 and reduction voltage circuit 2, become a trigger action self-lock switch, when S1 transfers connection to by disconnection, C8 will carry a positive pulse to IC3 pin 10, and switch Y is with self-locking among the IC3, and the electric current that telephone line provided is by the negative circuit of switch X composition among IC4 pin 13, the IC3 and switch Y provides working current from a period of time to IC4.IC4 is 14 grades of ripple carry binary counter/frequency dividers and pierce circuit, and it is full machine " timer ", utilizes its vibration, division function to coordinate full machine and works chronologically.IC5 be not afraid of power down in 10 seconds or 16 seconds, i.e. sound circuit is promptly put in record.After its playback trigger end is triggered by negative pulse, just the voice of typing can be reset and export, add to the Tr4 base stage by R14 and D11, the feed-in telephone line.

This alarm work state: after trigger switch 16 is connected, trigger latching circuit 6 immediately electric and self-locking, make vibration, frequency dividing circuit 7 get electric work simultaneously, 5 work of the number of putting/off-hook/redial on-off circuit, pulse/double-tone compatible signaling circuit 3 frequently make off-hook electronic switch 4 just carry out the first time " redialing " after connecting providing off hook signal.Because the effect of vibration, frequency dividing circuit 7, in the time that sets, repeat 4 dialing automatically, voice playback 8 work and by two audio/speech amplify, networking circuit 9 feed-in telephone lines.

Claims (7)

1, a kind of telephone alarm that does not need the peripheral hardware power supply comprises alarm housing (10), polarity switching, automatic take offing machine circuit, sound circuit, it is characterized in that trigger switch (16) is parallel to current-limiting resistance R1 two ends, connects with telephone wire; Polarity switching D1-D4 divides three the tunnel to connect off-hook electronic switch (4), reduction voltage circuit (1), (2) respectively; Reduction voltage circuit (1) sending and receiving circuit (3); Signaling circuit (3) connects off-hook electronic switch (4), networking circuit (9) respectively; Reduction voltage circuit (2) contact is from lock circuit (6); Trigger latching circuit (6) and connect oscillation frequency dividing circuit (7) and the off-hook/number of putting/redial on-off circuit (5) respectively; Oscillation frequency dividing circuit (7) contacts respectively from lock circuit (6) and sound circuit (8); Off-hook/the number of putting/redial on-off circuit (5) sending and receiving circuit (3).

2, the telephone alarm that does not need the peripheral hardware power supply according to claim 1 is characterized in that power end, other a tunnel that power end, a tunnel that power end, a tunnel that described off-hook electronic switch (4) a tunnel is connected to signaling circuit (3) is connected to the off-hook/number of putting/redial on-off circuit (5) is connected to sound circuit (8) is connected to the collector of the Tr4 of networking circuit (9).

3, the telephone alarm that does not need the peripheral hardware power supply according to claim 1 is characterized in that described reduction voltage circuit (2) is made up of resistance R 3, diode D7, voltage stabilizing diode D8; Be connected to the IC3 supply pin 16 of latching circuit (6); Trigger the switch Y that latching circuit (6) adopts the pin 1,10,15 among the integrated circuit CD4053 to form, Y output is connected to the IC4 supply pin 16 of oscillation frequency dividing circuit (7), and 2 passage Z, X switch are respectively the phase inverter of 4,13 pin output signals in the oscillation frequency dividing circuit among the IC3; The pin 4 of IC3 connects the off-hook/number of putting/the redial pin 13 of on-off circuit IC2.

4, the telephone alarm that does not need the peripheral hardware power supply according to claim 1 is characterized in that the pin 7 of the IC4 of described oscillation frequency dividing circuit (7) is connected to the IC5 trigger end of sound circuit (8) by negative circuit Tr5.

5, the telephone alarm that does not need the peripheral hardware power supply according to claim 1, the IC2 pin 9,10 that it is characterized in that the described off-hook/number of putting/redial circuit (5) are connected to by switch S 4 respectively and hang up the pin 4 that circuit Tr6 base stage, S5 are connected to the IC1 of signaling circuit (3); The pin 11 of IC2 links to each other with the pin 18 of IC1; IC2 pin 14 is connected to the collector of off-hook electronic switch Tr2, Tr3.

6, the telephone alarm that does not need the peripheral hardware power supply according to claim 1 is characterized in that described pair of audio/speech amplified, the base stage of the Tr4 of networking circuit (9) connects from 2 inputs or door D10, D11, and wherein D10 connects spontaneous circuit (3) dual-tone multifrequency end; D11 connects IC5 playback output terminal from voice circuit (8) by current-limiting resistance R14; The collector of Tr4 links to each other with the collector of Tr2, Tr3.

7, the telephone alarm that does not need the peripheral hardware power supply according to claim 1 is characterized in that the switch Y of the IC3 of described triggering latching circuit (6), and its input is joined by capacitor C 8 and reduction voltage circuit (2).

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