CN2199647Y

CN2199647Y - Telephone ringing apparatus

Info

Publication number: CN2199647Y
Application number: CN 94241527
Authority: CN
Inventors: 门宏
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-31
Filing date: 1994-03-31
Publication date: 1995-05-31
Anticipated expiration: 2004-03-31

Abstract

The utility model discloses a telephone ringing apparatus with anti-interference function, which adds a cipher checking and controlling circuit [4] in the existing ringing apparatus and comprises a circuit for controlling bell receiving [7], a decoding circuit [8], and an electronic gate circuit (9). The cipher checking and controlling circuit [4] is started by ringing signals, and sends out a controlling signal to start an electronic bell (5) to send out a ringing sound until receiving a coincident cipher signal, so bell disturbance caused by unrelated phone ringing can be effectively prevented and can not affect normal telephone communication.

Description

Telephone ringing apparatus

The utility model relates to the calling device that a kind of telephone communication is used, and more specifically says so to relate to a kind of phone ringing device.

In telephonic communication system,, in the telephone set ringing set must be arranged in order to call out the called subscriber.Ringing set in the telephone set that existing market is sold and reality is used mainly is made up of switch and electronic bell.When the telephone bandset on-hook, switch makes electronic bell and outside line keep connecting, and when the phone incoming call, the bell signal that outside line is transmitted starts electronic bell and sends ringing tone; When telephone bandset is mentioned, the switch action, the cut-out electronic bell is connected with outside line, and ringing tone stops.The thing of getting the wrong number is often arranged in daily life, and some telephone called user who squeezes into does not want to connect yet, but above-mentioned ringing set can send ringing tone equally under these situations, excuse me called subscriber's life and rest.If the interruption-free service of using switch to provide, then all phones all can not incoming call, influences normal telephone communication.

The purpose of this utility model provides a kind of phone ringing device with interference guard function, and it can prevent effectively that the tinkle of bells that irrelevant phone incoming call causes from bothering, and does not influence normal telephone communication again.

For achieving the above object, the solution that the utility model adopts is: be provided with a password and detect control circuit in above-mentioned phone ringing device.This password detects control circuit and is started by bell signal, and when receiving the code signal that is consistent, just sends control signal and start the electronic bell sounding.Because password is not known for unrelated person, thereby reach the purpose of interference guard.

Above-mentioned password detects control circuit to be formed by receiving bell control circuit, decoding circuit and electronic door circuit, and they are plugged between switch and the electronic bell.At ordinary times, receive the bell control circuit and be connected in the outside line ac circuit, be in wait state by switch.When the phone incoming call, the AC signalling signal that switch is sent makes receives the action of bell control circuit, the DC loop of giving connection to external call and subsequent conditioning circuit, and at this moment, the calling subscriber just can directly send code signal to the called subscriber.Code signal is delivered to electronic door circuit after decoding circuit decoding, if the password of receiving is consistent with setting code, electronic gate just is opened, and sends a control signal and starts the electronic bell sounding; Be not inconsistent if can not receive code signal or the signal of receiving and setting code, then electronic gate can not be opened, and electronic bell is noiseless.Because unrelated person do not know password, bother so can prevent the tinkle of bells that irrelevant phone causes effectively, and don't the ring when hindering relevant phone incoming call.

In above-mentioned receipts bell control circuit, comprise a dual-time constant delay circuit, it is subjected to the control of electronic door circuit, is used for time-delay and cuts off the outside line DC loop.When receive that the bell control circuit receives bell signal and the DC loop of giving connection to external call after, this delay circuit trigger.If do not receive the code signal that is consistent, then, get back to wait state through cutting off the outside line DC loop behind the short time delay automatically.If receive the code signal that is consistent, electronic door circuit sends a control signal and triggers this delay circuit and be converted to the long delay operating state, so that there is long ring time that the user is answered the call; The user does not carry machine yet and answers the call when finishing as long delay, then cuts off the outside line DC loop automatically, and ringing tone stops, and receives the bell control circuit and gets back to wait state.

Above-mentioned password is at least one position 0～9 number, is sent with the telephone set dialing mechanism by the calling subscriber.Code signal can be the pulse number that sends with impulse push key phone set or dialing disc type telephone set, and corresponding above-mentioned decoding circuit is the digital decoding circuit of pulse.

Code signal also can be the dual-tone multifrequency number that sends with double tone multiple frequency telephone set, and corresponding above-mentioned decoding circuit is the digital decoding circuit of dual-tone multifrequency.

Code signal can also be other any acquired signal that can transmit in a speech channel frequency band, and corresponding above-mentioned decoding circuit is the decoding circuit that can decipher this acquired signal.

Above-mentioned electronic door circuit comprises password setting circuit and control circuit, this password setting circuit is used for setting and changing password, and the output signal of decoding circuit compared with setting code, as the then trigger control circuit action that is consistent, send and control signal to electronic bell and dual-time constant delay circuit; As do not meet then control circuit and be failure to actuate.

Above-mentioned password setting circuit is a matrix circuit, can freely set and change at any time password easily by changing the contact user.

The password setting circuit also can adopt the circuit structure of other form, for example logic gates etc.

In the utility model phone ringing device, the operating voltage of each circuit is all taken from the direct voltage that switch provides, therefore, also has a polarity transformation circuits in this phone ringing device, be plugged on and receive bell control circuit back, be used to guarantee that each circuit voltage polarity is correct, and needn't consider the polarity of two outside lines not influence passing through of code signal.

The part that the utility model can be used as telephone set is directly installed in the telephone set, replaces original ringing set, and at this moment, switch is exactly the hook switch on the telephone set.When the telephone bandset on-hook, the normally closed contact of spring makes ringing circuit device and outside line keep connecting again; After telephone bandset was mentioned, hook switch was upspring, and normally closed contact disconnects, and cut-out ringing circuit device is connected with outside line.

The utility model also can be made a separate equipment, is serially connected between outside line and the telephone set, and the attachment device use as telephone set can realize above-mentioned purpose and function equally.At this moment, switch is that a direct current detects control circuit, and it comprises direct current test section and control section.This direct current test section is serially connected between outside line and the telephone set, and this control section is serially connected in outside line and password detects between the control circuit.When the telephone bandset on-hook, the phone DC loop is cut off by hook switch, and direct current detects control circuit and is failure to actuate because of no direct current, and its control section makes outside line and password detect the control circuit maintenance and connects; After telephone bandset was mentioned, hook switch was upspring and is connected the telephone set DC loop, and direct current detects the control circuit action, and its control section cuts off outside line and detects being connected of control circuit with password.

It can be a direct current relay that above-mentioned direct current detects control circuit, and relay line bag is its direct current test section, and relay tip is its control section.

It also can be electronic switching circuit or other similar circuit form that above-mentioned direct current detects control circuit.

No matter adopt in the telephone set of packing into or any as in two kinds of versions of machine outer attachment, after telephone bandset is mentioned, whole ringing circuit device cuts off with just being switched device being connected of outside line, therefore, the conversation and the dialing exhalation of telephone set is all had no effect.

Because the utility model has adopted the solution with cipher control electronic bell sounding, therefore can prevent bothering of irrelevant phone effectively, and don't influence normal telephone communication; Be provided with the password setting circuit, the user can set up and change at any time password, strong security easily on their own; The calling subscriber uses the telephone set dialing mechanism to send password, need not to be with in addition dispensing device, and is easy to use, is not subjected to site limitation; Working power is taken from the direct voltage that switch provides, and need not to establish in addition power supply, not only economy but also reliable.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the functional-block diagram of the utility model phone ringing device.

Fig. 2 is the circuit theory diagrams of first embodiment of the utility model.

Fig. 3 is a decoding circuit schematic diagram among second embodiment.

Fig. 4 is the circuit block diagram of the 3rd embodiment.

In block diagram shown in Figure 1 and circuit theory diagrams shown in Figure 2, switch 2 is the hook switches 6 on the telephone set, and when the telephone bandset on-hook, hook switch 6 is depressed, its contact disconnects outside line 1 and number dialing telephone call circuit 3 and detects control circuit 4 with password and connect, and the phone ringing device is in wait state.

Password detects control circuit 4 and forms by receiving bell control circuit 7, decoding circuit 8 and electronic door circuit 9.In Fig. 2 circuit diagram, relay K 1, capacitor C 1 etc. are formed receipts bell control circuit 7, when the phone incoming call, it is moving that the AC signalling signal that outside line 1 is transmitted inhales relay K 1 through hook switch 6, capacitor C 1, its contact K1-1 closure, the DC loop of engage relay K1, the direct voltage that is provided through outside line 1 by switch makes relay K 1 keep attracting state; While contact K1-2 closure, the connection subsequent conditioning circuit is connected with outside line 1.At this moment, switch is communicated with the calling subscriber with the called subscriber.

Diode VD1～VD4 forms bridge-type polarity transformation circuits 10, makes the direct voltage that switch provides by outside line 1, no matter the concrete polarity of two outside lines 1 how, can guarantee its output E point for just, the F point is to bear, for subsequent conditioning circuit provides operating voltage.Because there is higher direct voltage at VD1～VD4 two ends, and are then much smaller as the alternating voltage of code signal, can be modulated on the direct voltage and pass through, and can not caused distortion by VD1～VD4 rectification.

Integrated operational amplifier IC1, decimal system counting/distributor IC2, logical circuit D1～D5 etc. form the digital decoding circuit 8 of pulse.In the moment that relay tip K1-2 closure, E point positive voltage are set up, a positive pulse 11 that is produced by differential circuit C7, R3 makes the zero clearing of decimal system counting/distributor through the RESET input CR that NOR gate D4 and inverter D5 add to IC2.The pulse cipher signal that the calling subscriber sends is behind hook switch 6, relay tip K1-2, polarity transformation circuits 10, being coupled to integrated operational amplifier IC1 by capacitor C 2 amplifies, and after C3, VD5, VD6, C4 rectifying and wave-filtering, Schmidt trigger D1 and inverter D2 shaping, deliver to the counting input end CP of IC2.Behind the pulse train end of input of a password, IC2 output Y ₀～Y ₉In with the corresponding output of this password pulse number be high potential " 1 ", all the other outputs are electronegative potential " 0 ".Rest-set flip-flop D3 and VD7, C5, R1 form moving slowly-releasing delay circuit 12 of wink, and first pulse in the password pulse train of shaping circuit D1, D2 output makes C5 be full of electricity rapidly and with rest-set flip-flop D3 reset through VD7; After first pulse in the past, C5 begins the discharge by R1, because the time constant of C5, R1 is greater than the pulse spacing, the Partial charge that C5 bleeds off is replenished by second pulse rapidly again, so the D3 output remains " 0 "; After the pulse train of a password finishes, be discharged to below the threshold values of R input of D3 through time-delay C5, the D3 output just becomes " 1 " by " 0 ", and its rising edge is behind C6, R2 differential, produce a positive pulse 13 and make the IC2 zero clearing, prepare to receive the next bit password through NOR gate D4, inverter D5.Move the delay time of slowly-releasing delay circuit 12 wink and should generally get 200～400ms greater than the time (100ms) apart of two pulse front edges in the pulse train and less than the minimum time interval (500ms) between two password pulse trains.

Matrix circuit 14, form one three figure place electronic door circuits 9 with door D6～D8, RS latch D9～D11 etc., by three 0～9 digital its unlatchings of cipher control of forming.10 output Y of decimal system counting/distributor IC2 ₀～Y ₉Constitute matrix circuits 14 with three inputs with door D6, D7, D8, determine or change its tie point, also just set or changed password, for example the password of the correspondence of tie point shown in Fig. 2 is " 132 ".The tie point of this matrix circuit 14 can be determined and change easily voluntarily by the user.Three RS latch D9, D10, D11 form the control circuit of electronic door circuit 9, in the moment of relay tip K1-2 closure, the positive pulse 11 that differential circuit C7, R3 produce adds to the S input of D9 with the D9 set, and make D10, D11 set in succession, D11 is output as " 1 ", and electronic bell 5 is sounding not.When the pulse train of representing first password receives, wink, moving slowly-releasing delay circuit 12 was opened input and door D6, D7, D8 through the positive pulse 13 of differential circuit C6, R2 output, if first password is consistent, then " 1 " of the corresponding Y output of IC2 makes its output become " 0 " by " 1 " by the R input that D6 adds to D9.Because three grades of RS latch D9, D10, D11 are connected in series, when D10, D11 must be output as " 0 " in its previous stage its R end input just effective, so D9, D10, D11 correspond respectively to first, second and third position (hundred, ten, individual) of three passwords.After three passwords all were consistent, D11 output became " 0 ", makes electronic bell 5 sounding.The positive pulse 13 of differential circuit C6, R2 output is the unbalanced pulse of importing with door D6, a D7, D8, it is again the quenching pulse of decimal system counting/distributor IC2, but the CR input that arrives IC2 must be through D4, D5 two-level logic gate circuit, time delay is longer, so before IC2 was cleared, D6, D7, D8 had transferred out the output signal of its Y end.The effect that input and door D6, a D7, D8 are set is in order to eliminate in the receiving course of a pulse train, and the labile state of IC2 output may cause the misoperation of D9, D10, D11.

Time-base circuit IC3, logical circuit D12, D13, resistance R 4, capacitor C 8 etc. are formed the dual-time constant delay circuit of receiving in the bell control circuit 7 15.Time-base circuit IC3 constitutes negative pulse and triggers monostable flipflop, and its output is connected to inverter D12, and when not receiving the password that is consistent, D12 is output as " 1 " and adds to a input with a D13.Relay tip K1-2 rigidly connects when leading to, and the last voltage of C8 is " 0 " and another input that adds to D13, and D13 is output as " 0 ", and relay K 2 is failure to actuate.Along with positive voltage constantly charges to C8 through R4, the last voltage of C8 reaches " 1 " current potential behind a short time delay, make D13 output become " 1 ", relay K 2 is inhaled moving, its normally closed contact K2-1 disconnects, and makes relay K 1 dead electricity and discharges, and its contact K1-1, K1-2 all disconnect, cut off the outside line DC loop, receive bell control circuit 7 and get back to wait state.When receiving the code signal that is consistent, the D11 output becomes " 0 " by " 1 " in the electronic door circuit 9, the negative pulse that its trailing edge produces behind C9, R5 differential triggers monostable flipflop IC3 upset, inverter D12 is output as " 0 ", close and door D13, although at this moment institute's charging voltage reaches " 1 " current potential on the C8, D13 output still is " 0 ", after through a long delay, monostable flipflop IC3 replys stable state, D12 output becomes " 1 ", just becomes " 1 " with door D13 output and makes relay K 2 suctions moving.General desirable 15～60s of short time delay time, desirable 60～120s of long delay time.

Time-base circuit IC4, carry source of sound sounder HA etc. and form electronic bell 5, time-base circuit IC4 etc. constitute multivibrator, output is connected to and carries source of sound sounder HA, its earth terminal is connected to the output of D11, when electronic door circuit 9 is not opened, D11 is output as " 1 ", the IC4 failure of oscillation, and HA equates not sounding because of two terminal potentials; After electronic door circuit 9 was opened, D11 output became " 0 ", and multivibrator IC4 starting of oscillation when IC4 is output as " 0 ", carries source of sound sounder HA sounding, and when IC4 was output as " 1 ", HA stopped sounding, and so circulation forms ringing tone.After the user mentioned telephone bandset, hook switch 6 actions made outside line 1 disconnect with 3 connections of number dialing telephone call phone and with the ringing circuit device, and electronic bell 5 stops ring because of dead electricity, and the user can converse with the other side.

Also can go out to adopt the phone ringing device of dual-tone multifrequency number as password according to above-mentioned principle design, Fig. 3 is its decoding circuit schematic diagram.This decoding circuit is made up of dual-tone multifrequency decoder IC5, binary coded decimal decoder IC6.The dual-tone multifrequency code signal of being sent by the calling subscriber is coupled to the IC5 input through C2, is decoded into 4 bit signals by IC5 and sends into IC6, and IC6 is decoded into 1 decimal number with 4 bits, and makes its output Y ₀～Y ₉In correspondingly an output be high potential " 1 ", all the other outputs then are electronegative potential " 0 ", 10 output Y of binary coded decimal decoder IC6 ₀～Y ₉Access matrix circuit 14.As long as Fig. 3 circuit is respectively inserted in Fig. 2 corresponding four positions by G, H, I, J at 4, replace original decoding circuit 8, then be the phone ringing device of a complete employing dual-tone multifrequency password.

The utility model can also adopt the version that is independent of outside the telephone set, and its principle as shown in Figure 4.In this version, switch 2 is direct current relay K3, and relay line bag 16 is serially connected in the DC loop of telephone set 18, and relay normally closed contact 17 is serially connected in outside line 1 and password detects between the control circuit 4.When the telephone bandset on-hook, hook switch 6 cuts off the DC loop of number dialing telephone call circuit 3 in the telephone set 18, and relay K 3 is not inhaled because of no direct current, and its normally closed contact 17 makes outside line 1 and password detect control circuit 4 and connects, and the phone ringing device is with operate as normal; After telephone bandset was mentioned, hook switch 6 was connected the DC loop of number dialing telephone call circuit 3, and the direct current that flows through makes relay K 3 adhesives, and its normally closed contact 17 disconnects outside line 1 and detects being connected of control circuit 4 with password, and telephone set 18 can normal dialing or conversation.

Certainly, realization of the present utility model is not limited to above-mentioned several form, can also be other form according to above-mentioned principle design.

Claims

1, a kind of phone ringing device, it comprises:

Electronic bell [5] is used to produce ringing tone;

Switch [2], it is connected between outside line [1] and the electronic bell [5], is subjected to the control of telephone bandset state, makes outside line [1] and electronic bell [5] switch on and off two states;

Of the present utility model being characterised in that, it comprises that also a password detects control circuit [4], it is plugged between switch [2] and the electronic bell [5], this password detects control circuit [4] and is started by bell signal, and when detecting the code signal that is consistent, just send control signal and start electronic bell [5] sounding.

2, phone ringing device according to claim 1, it is characterized in that: described switch ［ 2 ］ is that a direct current detects control circuit ［ 16,17 ］, its direct current test section ［ 16 ］ is serially connected between outside line ［ 1 ］ and the telephone set ［ 18 ］, its control section ［ 17 ］ is serially connected in outside line ［ 1 ］ and password detects between the control circuit ［ 4 ］, and this direct current detects control circuit ［ 16,17 ］ cut-out outside line ［ 1 ］ after the telephone set DC loop is connected and detects being connected of control circuit ［ 4 ］ with password.

3, phone ringing device according to claim 2 is characterized in that, it is a direct current relay that described direct current detects control circuit ［ 16,17 ］, and relay line bag is its direct current test section ［ 16 ］, and relay tip is its control section ［ 17 ］.

4, phone ringing device according to claim 1 and 2 is characterized in that: described password detects control circuit ［ 4 ］ and comprises

Receive bell control circuit ［ 7 ］, it is connected on switch ［ 2 ］ back, is used to receive bell signal and connects and delay time the cut-out DC loop;

Decoding circuit ［ 8 ］, it is connected on receives bell control circuit ［ 7 ］ back, is used for deciphering to the received signal;

Electronic door circuit ［ 9 ］, it is plugged between decoding circuit ［ 8 ］ and the electronic bell ［ 5 ］, and this electronic door circuit ［ 9 ］ only when decoding circuit ［ 8 ］ output is consistent with setting code, just sends control signal and starts electronic bell ［ 5 ］ sounding.

5, phone ringing device according to claim 4, it is characterized in that: comprise a dual-time constant delay circuit ［ 15 ］ in the described receipts bell control circuit ［ 7 ］, it is connected with electronic door circuit ［ 9 ］, have short, long two delay times, be used for time-delay and cut off DC loop, this dual-time constant delay circuit ［ 15 ］ sends at electronic door circuit ［ 9 ］ and is converted to the long delay operating state when control signal starts electronic bell ［ 5 ］.

6, phone ringing device according to claim 4 is characterized in that: described decoding circuit ［ 8 ］ is the digital decoding circuit of pulse.

7, phone ringing device according to claim 4 is characterized in that: described decoding circuit ［ 8 ］ is the digital decoding circuit of dual-tone multifrequency.

8, phone ringing device according to claim 4 is characterized in that: described electronic door circuit ［ 9 ］ comprises at least one electronic gate, by its unlatching of at least one cipher control.

9, phone ringing device according to claim 4 is characterized in that: comprise a password setting circuit in the described electronic door circuit ［ 9 ］, it is connected with decoding circuit ［ 8 ］, is used for setting and changing password.

10, phone ringing device according to claim 9 is characterized in that: described password setting circuit is a matrix circuit ［ 14 ］, and its tie point is variable.