CN2224489Y - Automatic dialing telephone set - Google Patents

Abstract

The utility model relates to an automatic dialing telephone set, which overcomes the disadvantage of complicated circuits in the existing automatic dialing telephone set. The utility model is composed of a signal switch circuit 1, a detection circuit 2, a hand-free switch circuit 3, a start-up circuit 4, a coiling control circuit 5 and a redialing control circuit 6. The utility model is characterized in that a busy-tone signal and a ring back signal on a signal line are identified by the detection circuit 2, and thus, the coiling control circuit 5 is controlled to output coiling signals; the redialing control circuit 6 is controlled to output redialing signals; also the hand-free switch circuit 3 is controlled to switch on a hand-free key of the telephone set. The utility model has the advantages of simple circuit and reliable work, which can continuously carry out automatic dialing until the telephone set is put through after a user dial a telephone number for one time, and is convenient for the users to use the telephone sets.

Description

Automatic dialling device for telephone

The utility model relates to the telephone set in a kind of communication system, particularly a kind of automatic dialling device for telephone.

Along with the continuous increase of traffic, the phenomenon that the line is busy is more and more serious.The telephone set that uses has had manual redialing function at present, but it still can not satisfy people's demand, because under the situation that the line is busy, every group of number, all need take-up, press redial key then, so just bring a lot of inconveniences, wasted the time, thereby people have expected that development has the telephone set of automatic re-dialing function to the user, but it all has a time interval between each auto redial sign indicating number, the design of this blanking time allows external call to call in and stay, and to redial all be under hands-free state at every turn, and telephone set sends the sound that redials, this sound influences user and people's operate as normal on every side, as Chinese patent disclosed " patent No. is 93233548.9, the telephone automatic dialing machine ", its circuit is too complicated, the manufacturing cost height is difficult to apply.

It is a kind of simple in structure that the purpose of this utility model is to provide, and can constantly redial automatically until the automatic dialling device for telephone of putting through.

The utility model is finished with following mode: automatic dialling device for telephone is that the break-make that the collector and emitter by switch triode T2 is serially connected in control switch triode T1 between the base stage of switch triode T1 and the ground constitutes start-up circuit 4, the emitter of the base stage of switch triode T2 and the switch triode T1 hook switch line of answering the call, supply voltage from the collector electrode output phone hook switch line of switch triode T1 offers signal switching circuit 1, testing circuit 2, hands-free switching circuit 3, take-up control circuit 5 redials control circuit 6; Signal switching circuit 1 is to be made of through the base stage that resistance R 15 connects the collector electrode of switch triode T7 and meet switch triode T7 behind resistance R 16 serial connection diode D4 the output of the Q of flip-flop circuit IC1 end; The waveform shaping circuit that testing circuit 2 is made up of triode T9 and T8 divides two tunnel outputs after with the signal shaping on the telephone signal line, one road signal exports the CP end of the flip-flop circuit IC4 of delay circuit to through the switch triode T7 of signal switching circuit 1, export the D end of flip-flop circuit IC5 to from the Q end of flip-flop circuit IC4, the Q end of IC4 exports the CP end of flip-flop circuit IC6 to, another road signal of waveform shaping circuit output is to the CP end of IC5, the Q of IC5 end exports the base stage of switch triode T4 in the R end of the flip-flop circuit IC1 in the signal switching circuit 1 and the take-up control circuit 5 to, the Q of IC5 end outputs to the D end of IC6 and redials the CP end of the flip-flop circuit IC2 of delay circuit in the control circuit 6, exports the base stage of switch triode T6 the hands-free switching circuit 3 and the R end of the flip-flop circuit IC1 in the signal switching circuit 1 to from the Q end of IC6; Hands-free switching circuit 3 is to be made of switch triode T6; Take-up control circuit 5 is to be made of control switch triode T3 power on/off phone take-up between the base stage of the collector and emitter connection switch triode T3 of switch triode T4 and the ground; Redial control circuit 6 and form delay circuit by flip-flop circuit IC2 outer meeting resistance and electric capacity, export the CP end of flip-flop circuit IC3 to from the Q end of IC2, hold the base stage that exports switch triode T5 to from the R of IC3, export the CP end that feeds back to flip-flop circuit IC1 the signal switching circuit 1 from the Q end of IC3.Delay circuit is by being connected to resistance R 14 between the Q of flip-flop circuit IC4 end and the R end, being connected to capacitor C 7 and constituting between the R of IC4 end and ground in the testing circuit 2, and the delay time of delay circuit is greater than 0.35 second, and less than 1 second.Be serially connected with switch AN1 and resistance R 1 between the base stage of switch triode T2 in the start-up circuit 4 and the telephone set hook switch line, between the base stage of the collector electrode of switch triode T1 and switch triode T2, be serially connected with resistance R 3.

The utility model automatic dialling device for telephone matches with the existing telephone machine, after only needing the user to dial telephone number, when the line is busy it just can be constantly re-dialing telephone number automatically, till putting through, put through the back and remind user's communication by phone hand-free loudspeaker output ringing tone signal, it can be removed the trouble of user's repetitive operation from and save time, increase work efficiency, greatly make things convenient for the user, this device can be contained in the telephone set and the telephone set common board, also can be installed in separately in the box to link with the existing telephone machine.Its adopts the bistable delay circuit in testing circuit to discern busy-back signal and backward signalling automatically, and whether control redials control circuit and export and redial signal, so just makes entire circuit simple, and reliable operation reduces manufacturing cost.

The following drawings has provided an embodiment of the present utility model.

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is telephone set busy tone and ringing tone signal national standard oscillogram;

Fig. 3 is the circuit theory diagrams of the utility model embodiment.

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1, the utility model by signal switching circuit 1, testing circuit 2, hands-free switching circuit 3, start-up circuit 4, take-up control circuit 5, redial control circuit 6 and form.As shown in Figure 3, start-up circuit 4 is by on the emitter of switch triode T1 and the base stage and connecting resistance R2, connect the collector electrode of triode T2 behind the base stage series resistor R4 of switch triode T1, the emitter of triode T1 is received the A point, it is telephone set hook switch line, one was connected to the A point after switch AN1 connected with resistance R 1, the other end is connected to the base stage of triode T2, the grounded emitter of triode T2, capacitor C 1 is parallel between the base stage and emitter of triode T2, be connected to resistance R 3 between the collector electrode of the base stage of triode T2 and T1, the collector electrode of triode T1 is connected to the B point, and the supply voltage on the hook switch line is offered signal switching circuit 1, testing circuit 2, hands-free switching circuit 3, take-up control circuit 5 redials control circuit 6.Take-up control circuit 5 is the take-up switches that are connected to telephone set by the collector electrode of triode T3, the T3 grounded emitter, the base stage of F3 connects the collector electrode of triode T4, the grounded emitter of T4, between the collector electrode of T4 and B point, be connected to resistance R 5, connect the Q end of flip-flop circuit IC5 behind the base stage connecting resistance R6 of T4.The D end of flip-flop circuit IC1, IC2, IC3 all is connected to the B point.Signal switching circuit 1 is the Q end that is connected to the flip-flop circuit IC3 that redials control circuit 6 by the CP of IC1, be connected to the negative terminal of diode D2 and the negative terminal of diode D1 simultaneously at the R of IC1 end, connect the collector electrode of triode T7 behind the Q terminating resistor R5 of IC1, after diode D4 and resistance R 16, connect the base stage of T7.Redial control circuit 6 and be CP terminating resistor R7 to B point by flip-flop circuit IC2, capacitor C 2 is connected between the CP end of IC2 and the ground and constitutes delay circuit, the CP end of IC2 also connects the anode of diode D3, the Q terminating resistor R8 of IC2 is to its R end, on its R end, also be serially connected with capacitor C 3 to ground, the CP of flip-flop circuit IC3 is connected to the Q end of IC2, the Q terminating resistor R9 to R of IC3 holds, on the R end, also be serially connected with capacitor C 4 to ground, also be connected to the base stage of resistance R 10 at the Q of IC3 end to triode T5, the emitter and collector of T5 is connected to telephone set and redials button, testing circuit 2 is the holding wire serial connection capacitor C 10 back base stages to triode T9 by telephone set, the grounded emitter of T9, collector series connection resistance R 8 to the B points of T9, be connected to resistance R 19 between the collector electrode of T9 and the base stage, on the collector electrode of T9, also be serially connected with the anode of capacitor C 9 to diode D6, also be connected to the negative terminal of diode D7 at the anode of D6, the positive ending grounding of D7, the negative terminal of D6 is connected to the base stage of triode T8, the grounded emitter of T8, collector series connection resistance R 17 to B points, capacitor C 8 is connected between the collector electrode of T8 and the ground and constitutes waveform shaping circuit, the collector electrode of triode T8 is connected to the CP end of flip-flop circuit IC5, on the collector electrode of T8, also be connected to the negative terminal of diode D5, the anode of the positive terminating diode D4 of D5, the anode of diode D5 also is connected to the Q end of resistance R 16 to IC1, the negative terminal of D4 connects the base stage of triode T7, the grounded emitter of T7, collector electrode is connected to the CP end of IC4, on the collector electrode of T7, also be connected to the Q end of resistance R 15 to IC1, the D of flip-flop circuit ICA is connected to the noise elimination of telephone set, its Q is connected to the D end of flip-flop circuit IC5, on the Q of IC4 end, also be connected to resistance R 14 to its R end, between R end and ground, be connected to capacitor C 7 and constitute delay circuit, the Q of IC4 is connected to the CP end of flip-flop circuit IC6, the Q of IC5 is connected to the anode of diode D2, also be connected to resistance R 13 to its R end at the Q of IC5 end, also be connected to capacitor C 6 between R end and the ground, the Q of IC5 is connected to the D end of flip-flop circuit IC6, the D end of IC6 also is connected to the negative terminal of diode D8, the Q terminating resistor R12 of IC6 is to its R end, hold to being connected to capacitor C 5 between the ground at its R, the Q termination of IC6 has the anode of diode D1, its Q end also is connected to the base stage of resistance R 11 to triode T6, and the collector electrode of T6 and emitter are connected to the hands-free button of telephone set.

As shown in Figure 3, this device circuit operation principle is as follows:

When the telephone set hook state, telephone set hook switch line is connected the working power of start-up circuit 4, even also the A point is with positive 5 volts of voltages, when off hook state, the A point is not charged, and entire circuit can not be worked.Under hook state, the A point is with positive 5 volts of voltages, when pressing switch AN1 key, power supply makes triode T2 conducting by resistance R 1, the conducting of triode T2 makes triode T1 conducting, make the B point also be with positive 5 volts of voltages, the Voltage Feedback that resistance R 3 is ordered B is to the base stage of triode T2, at this moment, after switch AN1 disconnected, triode T1 still was in conducting state, kept the B point that positive 5 volts voltage is arranged, positive 5 volts of voltages that B is ordered offer signal switching circuit 1, testing circuit 2, hands-free switching circuit 3, take-up control circuit 5, redial the operate as normal power supply of control circuit 6.When start-up circuit 4 makes the B point that positive 5 volts of voltages be arranged, this voltage signal promptly makes triode T3 conducting by resistance R 5, make telephone set carry out take-up, promptly give connection to external call, B point voltage signal gives the capacitor C on the CP end that is connected to bistable trigger IC2 2 chargings by resistance R 7 simultaneously, make by bistable trigger IC2 and resistance R 8, after the delay circuit time-delay that capacitor C 3 constitutes, CP end from IC2 output high level to bistable trigger IC3, IC3 exports two paths of signals, one road signal is by resistance R 10, make triode T5 conducting, connect the button that redials of telephone set, Outgoing Call number, another road signal make bistable trigger IC1 output high level, this level signal is by resistance R 15 and R16 and diode D4, make triode T7 conducting, thereby make signal switching circuit 1 connect signal on the telephone signal line, make the RST on the testing circuit 2 beginning signal lines to testing circuit 2.The waveform shaping circuit that testing circuit 2 is made up of triode T9 and T8 and peripheral resistance and electric capacity, be divided into two-way after signal shaping on the holding wire become square wave, one tunnel square-wave signal is delivered to the CP end of bistable delay circuit IC4 through the diode D5 of signal switching circuit 1 and D4 and triode T7, bistable trigger IC4 and resistance R 14, capacitor C 7 constitutes the bistable delay circuit, time constant is designed time constant between 0.55 second to 0.8 second by R14 and C7 decision; Another road square-wave signal is directly delivered to the CP end of bistable trigger IC5.Decline at signal starts IC4, in the purified signal of the D of IC4 termination telephone set.After IC4 started, IC4 output high level was to the D end of IC5, and IC4 while output low level is to the CP end of bistable trigger IC6.If the signal on the holding wire is a busy-back signal, square wave low-level pulse width after its shaping is 0.35 second, rising edge promptly appearred in the time of 0.35 second, as shown in Figure 2, make IC5 export positive and negative pulse signal, its positive pulse signal resets and output low level IC1 by diode D2, thereby makes triode T7 output low level, turn-off the input of IC4, testing circuit 2 is stopped the input on the holding wire.The positive pulse signal of IC5 output also makes triode T4 conducting by resistance R 6, and triode T3 is ended, and T3 is by just telephone set being carried out take-up work.The undersuing of IC5 is by diode D3, make capacitor C 2 discharges, and then charging, after delaying time by IC2 this moment, start IC3 work output two paths of signals, one road signal makes triode T5 conducting by resistance R 10, connect the button that redials of telephone set, Outgoing Call number, another road signal make IC1 output high level, make triode T7 conducting, from and make RST on the testing circuit 2 beginning signal lines.Detect so repeatedly and output redials signal, until putting through phone.If the signal on the holding wire is a ringing tone signal, then rising edge just appearred in pulse signal in the time of 1 second, as shown in Figure 2, and because the timing of IC4 has only 0.55 second to 0.8 second, so before the pulse signal rising edge arrives, IC4 the time to and reset, output low level to the D end of IC5 can not be worked IC5, and the high level of IC4 output is to the CP end of IC6, IC6 receive by IC4 send by low level to high level signal, IC6 work and send positive pulse signal, this positive negative pulse stuffing signal one side and make triode T6 conducting by resistance R 11, connect the hands-free button of telephone set, make telephone set be in hands-free state, the positive pulse of IC6 output resets IC1 by diode D1 again on the other hand, the IC1 output low level, triode T7 is ended, and its output is a low level, turn-offs the input of IC4, testing circuit 2 is stopped the input on the holding wire, and not recirculation dialing, at this moment, telephone set on outside line is in talking state.

Bistable trigger IC4 in the utility model automatic dialling device for telephone circuit and IC2 can substitute with timing circuit, as substituting with 555 time-base circuits.

The utility model automatic dialling device for telephone owing to cancelled the stand-by period, thereby has the ruthless pre-emption function between redialing, saved the dialing stand-by period widely, has greatly improved efficient, has made things convenient for the user.

Claims (3)

1. automatic dialling device for telephone is characterized in that:

The break-make that is serially connected in control switch triode T1 between the base stage of switch triode T1 and the ground by the collector and emitter of switch triode T2 constitutes start-up circuit [4], the emitter of the base stage of switch triode T2 and the switch triode T1 hook switch line of answering the call, supply voltage from the collector electrode output phone hook switch line of switch triode T1 offers signal switching circuit 1, testing circuit 2, hands-free switching circuit [3], take-up control circuit [5] redials control circuit [6];

Signal switching circuit [1] is to be made of through the base stage that resistance R 15 connects the collector electrode of switch triode T7 and meet switch triode T7 behind resistance R 16 serial connection diode D4 the output of the Q of flip-flop circuit IC1 end;

The waveform shaping circuit that testing circuit [2] is made up of triode T9 and T8 divides two tunnel outputs after with the signal shaping on the telephone signal line, one road signal exports the CP end of the flip-flop circuit IC4 of delay circuit to through the switch triode T7 of signal switching circuit [1], export the D end of flip-flop circuit IC5 to from the Q end of flip-flop circuit IC4, the Q end of IC4 exports the CP end of flip-flop circuit IC6 to, another road signal of waveform shaping circuit output is to the CP end of IC5, the Q end of IC5 exports the base stage of R end and the middle switch triode T4 of take-up control circuit [5] of the flip-flop circuit IC1 in the signal switching circuit 1 to, the Q of IC5 end outputs to the D end of IC6 and redials the CP end of the flip-flop circuit IC2 of delay circuit in the control circuit [6], exports the base stage of switch triode T6 hands-free switching circuit [3] to and the R of the flip-flop circuit IC1 in the signal switching circuit [1] holds from the Q end of IC6;

Hands-free switching circuit [3] is to be made of switch triode T6;

Take-up control circuit [5] is to be made of the power on/off phone take-up that the collector and emitter of switch triode T4 connects control switch triode T3 between the base stage of switch triode T3 and the ground;

Redial control circuit [6] and form delay circuit by flip-flop circuit IC2 outer meeting resistance and electric capacity, export the CP end of flip-flop circuit IC3 to from the Q end of IC2, hold the base stage that exports switch triode T5 to from the R of IC3, export the CP end that feeds back to flip-flop circuit IC1 the signal switching circuit [1] from the Q end of IC3.

2. according to the described automatic dialling device for telephone of claim 1, it is characterized in that delay circuit in the testing circuit [2] is by being connected to resistance R 14 between the Q end of flip-flop circuit IC4 and the R end, being connected to capacitor C 7 between the R of IC4 end and ground constitutes, the delay time of delay circuit is greater than 0.35 second, and less than 1 second.

3. require described automatic dialling device for telephone according to right 1, it is characterized in that being serially connected with switch AN1 and resistance R 1 between the base stage of the switch triode T2 in the start-up circuit [4] and the telephone set hook switch line, between the base stage of the collector electrode of switch triode T1 and switch triode T2, be serially connected with resistance R 3.

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