CN2385489Y

CN2385489Y - Coding theft-proof intercom for building

Info

Publication number: CN2385489Y
Application number: CN 98243192
Authority: CN
Inventors: 崔延峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-21
Filing date: 1998-10-21
Publication date: 2000-06-28
Anticipated expiration: 2008-10-21

Abstract

The utility model discloses a password theft-proof intercom for buildings. An ordinary wired coding intercom is additionally provided with a password setting circuit and a recognition circuit, and simultaneously the password circuit can be connected with a temporary decoding switch. A user can freely select a password through the password setting circuit and the recognition circuit. Thus, only a person knows the password can call the user. Therefore, the utility model can achieve the purpose of anti-interference for the user. Moreover, the temporary decoding switch can temporarily deactivate the user's password, and thus, the using effect of the utility model can be further increased.

Description

The antitheft intercom of coding type building

The utility model relates to the antitheft intercom of a kind of multi-user's building, especially the antitheft intercom of being made up of double audio coding, decoding, ring, intercommunication and the circuit that opens the door of coding type multi-user building.

At present, the antitheft intercom of the multi-user of residential building mainly comprises direct addressin and coding addressing two classes, and they generally all are made up of keyboard, coding, demonstration, decoding, ring, intercommunication and door-opening mechanism (some also has viewable portion) etc.During use, generally, on host keyboard, import room number then by visitor's start.If this group room number has and have only a family corresponding with it in this intercom, then main frame just produces the ring that visitor and user can both hear.When this user has the people to be in and off-hook conversation at the appointed time, then can open or do not open the door according to actual conditions behind the user's communication; If this user's nobody home or overtimely do not connect, main frame automatic ring trip and resetting then.These antitheft intercoms particularly use in the high residential building the most general in the residential houses, they have played certain effect to quarter safety and standardized administration.But because these intercoms provide the service of unconditional formula to the visitor---promptly need only user's room number that the visitor exists in intercom of any selection on keyboard, main frame is set up the conversation contact with it for the visitor finds this user surely with regard to one.Certainly, if visitor's " selecting arbitrarily " on keyboard is exactly the interviewed family that he will look for just, main frame is commendable for efficient, the unconditional service that the visitor provides so.But the chance of a unrestrained selection room number of visitor has often been given in this " efficient, unconditional " service of formula, just might cause user's inconvenience like this when highly making things convenient for the visitor, sometimes user or even victim.The example of this respect is a lot, has to want to look for rooms 801 wrong by 901 originally; Have plenty of to forgetting room number downstairs---right, stay in the 6th buildings anyway know them, at will by one 60 *, even not to also inquiring; Have promote the sale of products, mischief-making, more " reconnaissance by firing " before having the thief to go into the room arranged ... certainly, in this case by the user in exhaling no anti-, animosity after, some also has property loss.

Task of the present utility model is for the user provides a kind of performance more perfect antitheft intercom, and its compact conformation is multiple functional, easy to use, and wiring is simple.What it can improve calling once chooses rate, makes user's unnecessary interference of filtering effectively.

For solving above-mentioned task, the technical solution of the utility model comprises a main frame and many user's handsets, wherein increases password setting, identification circuit and interim deciphering switch on user's handset.Password setting, identification circuit are made up of the d type flip flop with independent clock, and the figure place of password is exactly the number that needs d type flip flop.Can adopt the rear-mounted structure of password forward type and password, be that example illustrates its structure with password rear-mounted (be password be added in room number after).The D that constitutes the d type flip flop of first password terminates at the output of room number identification circuit in original subscriber's handset circuit, and the D of the d type flip flop of second password terminates at the Q output of the d type flip flop of first password ..., the rest may be inferred by analogy for it.The Q output of the d type flip flop of the last password is the array output end of room number, password, and this output is finally through a triode electronic switch of isolating diode control that is just connecing.The S end ground connection of forming all triggers of password, R terminates on the corresponding output of key assignments of zero clearing sign indicating number of output valve of original subscriber's handset decoder and host code circuit.The CP end of the d type flip flop of every password is received the corresponding output end of the decoder of original subscriber's handset by the decimal system value of this password.

The operation principle of password identification circuit is such: the visitor is by one group of room number of main frame requirement (be first room number after password) input, the combination of password, if the room number part has and has only a family with it at once in this intercom, then the code signal sent of main frame is through the decoding of this user's handset, decoding circuit is promptly exported a high level after delivering to the identification of room number identification circuit, this high level signal is added to the D end of d type flip flop of first password of newly-increased password identification circuit, (order and figure place) also is right if the password inputed subsequently of visitor, then the code signal sent of main frame is through room number, the decoding that password is shared, behind the decoding circuit, at first one high level pulse is arranged at the CP of the d type flip flop of first password end, the rising edge of this high level pulse makes the d type flip flop upset of first password that possesses roll over condition, so also makes second password (supposing that this also is last password) possess roll over condition.When the CP of the d type flip flop of second password end was also received the high level pulse that decoding circuit sends here, this d type flip flop also overturn.The result imports when correct when room number, password, and its array output end has high level output.The conducting of a triode electronic switch of this high level control passes to main frame by some interlock circuits of this user's handset with the information of " I am selected " then, allows main frame do further response.If when the input password, as long as there is one to make mistakes, then the CP of the d type flip flop of this password end can not receive high level pulse, and d type flip flop just can not overturn, make the link of room number, password combination output interrupt the triode electronic switch conducting that can not make it to control at last thus.Like this, even the input room number is right, but password is not right, can not choose this user---and main frame is not sent out ring, makes this user avoid the unexpected purpose of disturbing thereby reach.

Interim deciphering switch that is be user's handset password setting, identification circuit effectively/invalid selector switch.One group of normally open contact group of this switch is connected on the wiring board of user's handset by lead, wherein a contact links to each other with the output of room number identification circuit, another contact links to each other with the positive pole of an isolating diode, and the negative pole of this isolating diode links to each other with the negative pole that positive pole is connected on another diode of room number, password combination output, the negative pole phase contact of these two diodes is as triode electronic switch of the final control of the output of room number or room number, password combination.The password useless when contact of interim deciphering switch is connected, password is effective during disconnection.

Certainly, the password of user's handset also can be formed by the R-S trigger with door, its structure is as follows: the output of the room number identification circuit of the S termination original subscriber handset of the R-S trigger of first password of formation, an input of double input end of the Q termination of R-S trigger and door, the decimal system value of getting by this password with another input of door is received the corresponding output end of original subscriber's handset room number decoder, and with the output of door be exactly the output of this password, it receives the S end of the R-S trigger that constitutes second password ... the constituted mode of all the other every passwords is identical with first.Constitute the S end that last password and output door connect a R-S trigger, and the Q of R-S trigger end is the array output end of this user's room number, password, it is by triode electronic switch of the final control of an isolating diode that is just connecing.In addition, the R end that constitutes all R-S triggers of password also will be received in the atom machine decoder on an output valve and the output that main frame zero clearing sign indicating number key assignments equates.

In addition, user's handset password can also be made of transistor circuit.At first, can form by triode, diode, its circuit is as follows: the collector electrode that constitutes the triode of first password connects the output of atom machine room number identification circuit, base stage links to each other with an end of a resistance, the other end of resistance links to each other with the negative pole of two isolating diodes, and the positive pole of one of them diode is received the corresponding output end of atom machine room number decoder by the decimal system value of this password; The positive pole of another diode connects on the emitter of triode, as the self-insurance path after this triode conducting.Simultaneously, the emitter that constitutes the triode of first password still is the output of this password, and it receives the collector electrode of another triode that constitutes second password ..., the constituted mode of all the other every passwords is identical with first.The emitter of triode that constitutes last password is as the array output end of this user's room number, password, and it is by triode electronic switch of the final control of an isolating diode that is just connecing.

Secondly, in transistor circuit, can also form password by controllable silicon, structure is as follows: the silicon controlled anode that constitutes first password connects the output of atom machine room number identification circuit, grid is received the corresponding output end of atom machine room number decoder by the decimal system value of this password, the silicon controlled negative electrode is the output of this password, and it is received on the silicon controlled anode that constitutes second password ... the constituted mode of all the other every passwords is identical with first.The silicon controlled negative electrode of last password is the array output end of this user's room number, password, and it is by triode electronic switch of the final control of an isolating diode that is just connecing.

At last, the password of user's handset can also in the circuit that transistor, diode are formed, just belong to and door or door in fact by forming with door or door.Be described below: the double input end of first password of formation and an input of door are connected on the output of atom machine room number identification circuit, with another input double input end of termination of door or the output of door, an or input of door, receive by the decimal system value of this password on the corresponding output end of atom machine room number decoder, or another input of door and the double input end that constitutes second password be with after an input of door links to each other, and receives on first password and output door ... the constituted mode of all the other every passwords is identical with first.Last password and output door are the array output end of this user's room number, password, and it is by triode electronic switch of the final control of an isolating diode that is just connecing.

Though above password setting, identification circuit are made up of multiple difference, its operation principle is basic identical with the circuit of being made up of d type flip flop, here no longer narration.

Because in the above-mentioned solution is to increase password setting, identification circuit and decipher switch in user's handset temporarily, can make user's unnecessary interference of filtering greatly like this, can improve the practicality of native system where necessary by interim deciphering switch cancellation password again.Simultaneously, password setting, identification circuit structurally adopt the structure close or identical with the room number identification circuit, thereby make both can share the omnibus circuit of main frame to greatest extent, so not only simplified host circuit, and helped the antitheft intercoms of coding type that still use are in a large number at present encrypted transformation.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the utility model host circuit schematic diagram;

Fig. 2 is the complete circuit theory diagrams of the utility model embodiment 1 user's handset;

Fig. 3 is the circuit theory diagrams of the utility model embodiment 2 password setting, identification division;

Fig. 4 is the circuit theory diagrams of the utility model embodiment 3 password setting, identification division;

Fig. 5 is the circuit theory diagrams of the utility model embodiment 4 password setting, identification division;

Fig. 6 is the circuit theory diagrams of the utility model embodiment 5 password setting, identification division;

Embodiment 1:

The CZ1 of Fig. 1 is a kind of four flat sockets, and X1, X2 are its a pair of power lines, and wherein X1 is a power positive end; X3, X4 are a pair of holding wires.During making, the actual quantity of CZ1 should equate (only drawing one among the figure) with number of users, and corresponding with the CT1 of Fig. 2, and promptly CT1 can insert among the CZ1 easily, at this moment, and CT1 and the corresponding connection of X1～X4 between the CZ1.JX1 is a connecting terminal block, wherein+12V and UPS are straight-through, and it gives electric control lock DKS and radio alarming device IC19 power supply; + 5V is by infrared induction controller (not drawing among the figure) control, and it gives the electronic circuit board power supply of main frame, handset.Infrared induction controller should be contained near the host keyboard, and like this, when the keyboard ,+5V is switched on as the people, and the people back+5V that leaves away closes automatically.When+5V is switched on and has the people to import on keyboard, coding chip IC1 just sends to corresponding coding sequence through X3 to customer group, simultaneously, this coded sequence is also sent among the local demonstration decoder IC2 and is decoded, and the output of IC2 is delivered on the input port of four driving/latch IC11～IC14.In addition, IC1 is when whenever receiving a key assignments input, also send to a high level pulse for yardage counter IC3 by its 10th pin, these pulses are behind the IC3 counting, its output Y1～Y4 is with position control signal difference control IC 11～IC14, and the room number part in the keyboard input is just shown by charactron IC15～IC18 like this; Simultaneously, output Y5, the Y6 of IC3 control T6, T7 indicate cryptopart in LED1, LED2.During making, below IC15～IC18, put on " room number ", and below LED1, LED2, put on " password ", and LED1, LED2 should follow the back at IC18, can make " * * " type on the shell of its relevant position, allow the user understand cryptopart " * * " expression.IC5 is the code character counter, and when the one-time continuous input of keyboard was reach four, IC5 just added " 1 " automatically, and when input was reach four groups, IC5 cut off the power supply of IC1, thereby the blockade keyboard makes the visitor can't continue input.Inverter ic 4-* or door IC6-*, NOR gate IC8-*, d type flip flop IC9-1, IC9-2 and some related elements, the control logic circuit of having formed main frame, does they are mainly used to detect have handset selected? the handset of choosing whether converse by off-hook? whether on-hook etc. behind the off-hook, and by associated electrical switch control coding chip IC1, ringing circuit IC10, microphone amplifier HTL1, and speaker amplifier YSL timesharing uses X3, X4 multifunctional signal line, can make the line of main frame and user's handset minimum like this.Resistance R 7, capacitor C 6 are formed the ring timer, when timing time arrives, the breakdown conducting of voltage-stabiliser tube DW3, like this high level signal through or door make the total clear circuit generation of the main frame of forming by NOR gate IC8-3, capacitor C 9, resistance R 13 zero clearing negative pulse behind the IC6-1, this negative pulse makes IC11～IC14 blanking on the one hand, after IC8-2 shaping, paraphase, give each interlock circuit of main frame, handset on the other hand, force them to reset simultaneously.Zero clearing negative pulse when resistance R 13 is also formed main frames and powered on diode D6, capacitor C 10 produces circuit, equates for guaranteeing the zero clearing pulsewidth that the two-way clear circuit produces, and presses the C9=C10 value in the circuit.Resistance R 12, capacitor C 8, voltage-stabiliser tube DW5, inverter ic 4-2, form six input codes judging circuit of correcting errors with door IC7-1, when the room number of input, when password is all correct, IC4-2 blocks IC7-1; Otherwise the circuit of being made up of them makes the total clear circuit of main frame produce quenching pulse.Owing to increased password in handset, so visitor's input might make mistakes, it is necessary that the input code judging circuit of correcting errors is set in main frame like this, and what it can be according to input code makes different reactions to mistake.Button AN1 is manual nulling button, and it is contained on the appropriate location of keyboard, and puts on " removing " printed words.Button AN2 is the manual nulling button of code character counter IC5, and it is contained on the appropriate location of antitheft door inboard, and puts on " alarm release " printed words.AN4 is resident family's door open button of going out, and it is optional often drives button from homing position type two, and is contained on the inboard appropriate location of antitheft door, puts on " opening the door " printed words at the adjacency of AN4.

At last, in order to cooperate the anti-theft capability that effectively uses and improve main frame of handset password, the wireless encoding warning device IC19 that also is provided with " assistance button " AN3, the rechargeable timer W1 of electric capacity, C12 on the main frame and controls by their, do not know the guest of owner's password more as yet, can start radio alarming device IC19 by " assistance button " AN3 and call out the operator on duty to obtain help; Simultaneously, the electric capacity timer of being made up of variable resistor W1, capacitor C 12, voltage-stabiliser tube DW6 cooperates (not drawing among the figure) with infrared induction controller, can hatch a sinister plot and near stop crime main frame people monitors to those, when time of staying of criminal during, also can start radio alarming device IC19 automatically and report to the police greater than time of host setting (capacitor C 12 chargings)." assistance button " AN3 is one and often drives button from homing position type, and it is contained on the appropriate location of host keyboard, simultaneously mark " assistance " printed words thereon.The contact of AN3 is connected on the main frame general supply X1, another contact connects the capacitor C 14 of a minus earth and the positive pole of diode D9, the end of the negative pole connecting resistance R24 of D9, the base stage of another termination triode electronic switch T9 of R24, the collector electrode of T9 connects connecting terminal block JX1's+the 12V power end, emitter connects the power positive end of wireless encoding warning device IC19, to the continuous coded message of spatial emission, can receive by a portable receiver prison in coverage by these information when its power supply is switched on for IC19.After AN3 is pressed, the T9 conducting, IC19 gets electric work, and simultaneously, capacitor C 14 is recharged.After AN3 resetted, T9 still kept conducting a period of time under the effect of C14, R24, thereby warning still can be continued for some time after AN3 resets.

In user's handset schematic diagram shown in Figure 2, the input of decoding chip IC22 by resistance R 29 be connected on the X3 multipurpose holding wire of plug CT1 after capacitor C 20 is connected, so that receive the coded message that main frame is sent at any time, the input of decoder IC23 is corresponding with the output of decoder IC22 to link to each other, the output of IC23 is made independently pad by 0～9 pairing each output on circuit board, and correspondence puts on 10 numerals such as " 0～9 ", docks with it to make things convenient for room number, cryptochannel.Four triggers that constitute room number meet the input D of the trigger IC24-2 of second room number by the output Q of the trigger IC24-1 of first room number, and the output Q of the trigger IC24-2 of second room number meets the input D of the trigger IC25-1 of the 3rd room number, and the rest may be inferred by analogy for it.The trigger IC26-1, the IC26-2 that constitute two passwords at last are also by connecting with upper type, then the input D of the trigger IC26-1 of first password is connected on the output Q of trigger IC25-2 of the 4th room number, the output Q of the trigger IC26-2 of second password is the array output of room number, password, and it is connected on the positive pole of isolating diode D11.Input D with the trigger IC24-1 of first room number is connected on the X1 of plug CT1 in addition.Constitute the S end ground connection of all triggers of room number, password, output valve that R terminates at decoder IC23 and the key assignments that Fig. 1 host code chip is got are on corresponding output pin the 14th pin of the zero clearing sign indicating number of " 1101 "; The CP end of every d type flip flop is received on the corresponding output end of decoder IC23 by the decimal system value of this room number or password.Certainly when processing circuit board, the CP of each d type flip flop end is also equally made pad by the output of IC23, and then determines the room number and the password of every estrade machine by wire jumper.Room number can be fixed earlier when dispatching from the factory, but password welds after should allowing the user selected voluntarily more temporarily.Selected or the later change of each its password of user, both irrelevant, also irrelevant with main frame with other users.So the replacing of password need only change wiring and inform that in time relatives and friends get final product in user's handset.No matter be room number or password, its selected, welding process are exactly " setting " of room number, password, and room number, password are in case setting completed, related circuit has just become the circuit that host code is discerned automatically, so, often use " room number, password setting, identification circuit " in above text description, its essence is exactly same circuit.Line shown in Figure 2 has been specified " a 2603 " user that password is " 37 ", and promptly this user's room number, password combination should be " 260337 ".In order to make the user's handset that increases password be suitable for practicality more, in circuit, also be provided with and make interim invalid " temporarily deciphering switch " AN5 of password, AN5 can be a two positions locking press button or toggle switch, it is contained on user's receiver, and operation part is exposed at receiver outside, and puts on " password effectively/invalid " printed words in its adjacency appropriate location.The contact of AN5 is connected on the tie point that the input D of the trigger IC26-1 of the output Q end of the last room number trigger IC25-2 and first password holds, another contact connects the positive pole of isolating diode D12, and the negative pole of D11 of output Q end that the negative pole of D12 and positive pole are connected on the trigger IC26-2 of the last password links to each other.Interim deciphering switch AN5 password useless when its contact is switched on, otherwise password is effective.The user of password useless, visitor import on host keyboard and can only import this user's room number, and main frame sends out ring promptly for this user, so unless you are waiting a guest who does not often visit or you just not to be afraid of interference originally, otherwise you should allow password effective.D11, the negative pole tie point of D12 is as room number or room number, the output of password identification circuit, connect the positive pole of the capacitor C 21 of a minus earth, one end of the negative pole of a diode D13 and resistance R 31, the base stage of another termination triode electronic switch T14 of R31, the X1 of the collector electrode plug CT1 of T14, the moving contact that emitter is accepted the mechanical switch SA1 of receiver SPK Weight control is on the cutter of SA1, the break contact of SA1 connects the end of a current-limiting resistance R33, the other end of R33 links to each other with an end of resistance R 32 and the positive pole of diode D14, on the X4 multifunctional signal line of the negative pole plug CT1 of D14; The base stage of the electronic switch T15 of another termination ringing loudspeaker SP2 of resistance R 32, the X1 of the collector electrode plug CT1 of T15, emitter connects the anode of SP2, and the negative terminal of SP2 connects an end of capacitor C 22, on the X3 multifunctional signal line of the other end plug CT1 of C22.The make contact of one termination SA1 of the positive pole of diode D13 and resistance R 34, the other end of R34 is answered the base stage of the electronic switch T16 of a SPK, the grounded emitter of T16, collector electrode is answered the negative terminal of a SPK, positive termination capacitor C 23 1 ends of SPK, the X3 multifunctional signal line of C23 other end plug CT1.In addition, the power positive end of user's microphone amplifier HTL2 and the contact of door open button AN6 also connect the make contact of SA1, and another contact of AN6 connects the positive pole of isolating diode D14, and the output of HTL2 is on the X4 multifunctional signal line of capacitor C 24 plug CT1.Obviously, X4 multifunctional signal line is responsible for the transmission of information such as handset " selected ", " off-hook ", " voice ", " opening the door ", on-hook to main frame.More than each element constituted user's logical circuit, they cooperatively interact and make the various signal timesharing of user and main frame use X3, X4 multifunctional signal line.Wherein capacitor C 21 is transition self-insurance links of electronic switch T14---when SA1 is turned in the process of make contact by break contact; because the output of D11, D12 is step-down; this moment, C21 made T14 continue conducting; the value of C21 is when guaranteeing that T14 can reliably finish the transition self-insurance; should obtain smallerly as far as possible, help improving the repeated use frequency of main frame like this.D13 holds and isolates and the self-insurance of T14 during conversing---and D13 does not prevent that the high level of D11 or D12 output from making T16 and HTL2 work before SA1 moves, and after the make contact closure of SA1 and the C21 discharge off, D13 keeps the self-insurance conducting of T14, until user's on-hook.SA1 now is in and is subjected to receiver SPK weight depressing position among Fig. 2, and after receiver SPK picked up, the contact of SA1 was realized conversion automatically.The current-limiting resistance R33 that joins with the SA1 break contact plays the signal of decay by the output of SA1 break contact in circuit, purpose is to allow this signal be unlikely the T12 of actuator that opens the door of main frame is moved, and the value of R33 is got 5K～50K according to circumstances.User's door open button AN6 is optional often to drive button from homing position type, the belly that it is contained in receiver SPK is for well, can prevent like this that some users from only hearing the tinkle of bells and not the off-hook conversation confirm visitor's identity just open the door (certainly if just do not converse behind user's off-hook by opening the door button AN6, that has just been had no idea).Adjacency at AN6 is put on " opening the door " printed words.The effect of diode D14 is to isolate, purpose is that each handset is separated by the signal of X4 multifunctional signal line transmission, because when reality is used, has the plug CT1 of numerous user's handsets to be inserted in side by side on the socket CZ1 of main frame simultaneously, like this, the X1 of each handset～X4 becomes relation in parallel.In the handset circuit because the existence of door open button AN6, under the situation that does not have isolating diode D14, the high level signal of " I am selected " that certain user's handset is sent to main frame through X4, can be the AN6 that presses by the people at this moment just by other users makes this user's triode electronic switch T14 conducting through D13, R31, and the normal concord that certainly will disturb so that destroy main frame and selected user like this concerns.

Below according to the operation principle of Fig. 1 main frame and Fig. 2 handset circuit structure explanation each several part.Promptly produce an about quenching pulse of 0.7 second by power on clear circuit R13, D6, C10 after the main frame energising, this pulse all resets the related circuit of main frame and handset.Behind the circuit reset, the mains switch T4 of coding chip IC1 is in conducting state, IC1 at first obtains the right to use of X3 like this, and when the people imported a group coding on keyboard, then this set of encoded information was delivered to the input of decoder IC22 of each user's handset of customer group on the one hand through X3; The room number of coding part shows on IC15～IC18 charactron under the control at IC3 after this locality shows decoder IC2 decoding by turn on the other hand, and the cryptopart of coding is indicated by LED1 and LED2 under the control of IC3.If the room number of this group coding partly has a Subscriber Number corresponding with it, then first coding sending here of IC1 is through having a high level pulse behind IC22, the IC23 on the CP of IC24-1 end, and this high level pulse makes the IC24-1 upset; In like manner, after every room number is all by correct input, can be at the output Q of the trigger IC25-2 of the last room number end output high level, this user's handset is in two kinds of situations then: first kind is that the interim deciphering switch AN5 of this user's handset is in disconnection---when being the password effective status, the high level of the output Q of IC25-2 end can't make the electronic switch T14 conducting of this handset at this moment, be the temporary transient no-output of handset, main frame also certainly will keep the input state by IC1 control X3 like this---and main frame continues to wait for that the visitor inputs back two passwords.When two passwords of input also to the time, then on the output Q of the trigger IC26-2 of this last password of user's handset, export high level, this high level makes electronic switch T14 conducting behind isolating diode D11; The interim deciphering switch AN5 that second kind of situation is this user's handset is in on-state---when being the password useless state, at this moment, the high level of the Q of IC25-2 end output is walked around password identification circuit and is made electronic switch T14 conducting through interim deciphering switch AN5, isolating diode D12.After the T14 conducting, make that at first this user's the electronic switch T15 of ringing loudspeaker SP2 is open-minded, promptly this user performs and receives bell and prepare; Secondly also send out a high level signal of having been decayed by the X4 of CT1 to main frame by R33 through the break contact of switch S A1, isolating diode D14, this signal makes the IC7-2 output high level that is in strobe state, T4 ends like this, the T3 conducting, IC1 surrenders the control of X3, keyboard is blocked, and ringing circuit IC10 obtains the right to use of X3 and sends ringing tone to this user simultaneously.Owing to the signal of sending here through X4 was decayed through resistance R 33, it is not enough to promote the electronic switch T12 of electric control lock in addition.After main frame sent ring, ring timing circuit R7, C6 also picked up counting, and the D of two trigger IC9-1, IC9-2 end also is changed to high level simultaneously.If in the ring time of regulation, this user has people's off-hook, then the make contact of the mechanical switch SA1 of this user's handset is uprised by low, break contact is then by high step-down, the variation of this high-low level at first makes the electronic switch T15 of ringing loudspeaker SP2 end, and the X4 of while plug CT1 is output low level also; And the electronic switch T16 conducting of the receiver SPK that is connected with the SA1 make contact, user's microphone amplifier HTL2 also electric work, handset was carried out conversation and was prepared this moment.At main frame, the low level of X4 makes IC7-2 output step-down, and electronic switch T3 is ended, the T4 conducting, and ringing circuit is surrendered the X3 control, and the coding chip IC1 X3 right to use of getting back.Simultaneously, ring timing circuit R7, C6 also stops timing, the output of inverter ic 4-2 uprises, at this moment, if full six of input, the high level of IC4-2 just makes the IC7-1 output high level that has been in strobe state remove to trigger the total clear circuit IC8-1 of main frame, R13, C9 produces reset signal, this reset signal makes the main frame associated components as driving/latch IC11～IC14 blanking on the one hand, yardage counter IC3 zero clearing resets, also pass through simultaneously T11, IC21 makes the usufructuary IC1 of the X3 that gets back send a zero clearing sign indicating number that is encoded to " 1101 " to customer group, forces the room number of user's handset, password identification circuit IC24-1～IC26-2 zero clearing.In addition, the high level of IC4-2 also charges to C7 by R11, when C7 is recharged about R11C7 after second, and electronic switch T5 conducting, C6 is discharged by force like this.Meanwhile, behind the IC7-2 step-down, also make off-hook detection trigger IC9-2 upset, the high level of its Q end makes self-resetting circuit R4, the C2 of IC9-2 pick up counting on the one hand, also trigger the total clear circuit of main frame on the other hand and produce reset signal through IC6-1, when input code reaches six, IC6-1 and IC7-1 almost trigger the total clear circuit of main frame simultaneously, but when input code is four (promptly this user cipher is invalid), have only the high level of IC6-1 to trigger the total clear circuit of main frame.The Q end of IC9-2 makes the C5 charging through IC8-3, and IC9-1 also overturns when the C5 charging reaches the DW2 puncture voltage, and after the IC9-1 upset, IC9-2 promptly can reset under R4, C2, DW1 effect.Obviously, can reliably overturn in order to guarantee IC9-1, the resetting time of IC9-2 (R4C2) should be greater than the flip-flop transition (R5C5) of IC9-1, i.e. R5C5＜R4C2; And because the output of total clear circuit of the R termination main frame of IC9-1, like this, in order to make IC9-1 keep away this time (unwanted) zero clearing, the time (R5C5) of upset should be R13C9＜R5C5 greater than the zero clearing pulsewidth (R13C9) of total clear circuit also from user's off-hook to IC9-1.The IC9-1 upset makes electronic switch T2 end, the T1 conducting, and promptly IC1 surrenders the X3 control.After the T1 conducting, the microphone amplifier HTL1 and the speaker amplifier YSL of main frame get electric work, and this moment, HTL1 obtained X3 and YSL obtains the X4 right to use.Like this, main frame has just been set up conversation with user through ring and off-hook and has been got in touch.After the conversation, this user can open the door or not open the door according to the actual conditions decision, and on-hook gets final product then.The user is opening the door or directly after the on-hook, the conversation of main frame keeps trigger IC9-1 to reset under the effect of X4 high level pulse, and like this, main frame and handset are returned to the input state when just having powered on again.Really, user and the length of main frame air time are by the decision of the state of IC9-1---the IC9-1 set of overturn, and conversation begins; IC9-1 resets, end of conversation.So IC9-1 is called as " conversation keep trigger ", its time-delay triggers the length of flip-flop transition (R5C5) except outside the Pass the zero clearing pulsewidth (R13C9) with total clear circuit has, and is also determining when begin to converse with main frame behind user's off-hook.Because just begin to calculate the time-delay flip-flop transition (R5C5) of IC9-1 behind user's off-hook, if there is the one short period (approximate R5C5 second) to can't hear main frame (visitor's) response behind user's off-hook, then this user may think mischief and on-hook.The time-delay flip-flop transition (R5C5) of IC9-1 should be not oversize in other words, generally gets R5C5＜2 and second get final product.

The situation that is caused each logical circuit work after the ring by user's off-hook more than has been described, below ring once is described again after, the situation that main frame, handset is resetted by ring timing circuit R7, C6.When the ring timing time arrives, then the DW3 of C6 through having punctured makes D2 export a high level, and this high level at first blocks IC8-3, make the total clear circuit IC8-1 of main frame, C9, R13 produce quenching pulse through IC6-1 simultaneously.After quenching pulse resetted IC3, the output of IC7-2 was also by high step-down, like this, cause T3 to end, T4 conducting---IC10 surrenders the X3 control, and ring stops, and IC1 obtains the X3 control, so IC1 removes zero clearing sign indicating number to user's mass-sending at quenching pulse under the IC21 effect; Simultaneously, IC9-2 is also upset behind the IC7-2 step-down, because IC8-3 is by the blockade of the high level of C6, so the Q of IC9-2 can not transmit to subordinate; And the high level of IC9-2 output Q is except that clear circuit R4, the C2 power supply of delaying time to self, because it is by the covering of the high level of C6, so inoperative to total clear circuit.The IC7-2 step-down also makes the high level of IC4-2 output make the C7 charging through R11, obviously, at R11C7 after second, the discharge switch T5 conducting of C6.So, for being maintained to IC9-2, the high level that makes C6 resets, must guarantee R11C7＞R4C2, could block IC8-3 effectively like this.In addition, main frame, the handset that causes by manual reset button AN1 reset principle be the same by the ring timing time to the main frame that causes, the handset principle that resets, only manually zero clearing can take place at any time, and " timing time to " causes zero clearing, and only being filled electricity at C6 is that DW3 could take place when puncturing.The effect of capacitor C 1 is for after resetting at AN1 in the circuit, keeps blockade to IC8-3 by C1.Illustrate at last, when input full six and when makeing mistakes (room number or password mistake) produce the situation of zero clearing triggering signal by IC7-1.During full six of input then the Y6 of IC3 for high and make the logical R12 charging of C8, when six bit codes entirely to the time, then the X4 high level of user's handset makes IC7-2 be output as height---IC4-2 output is low, and promptly IC7-1 is blocked; Wrong in six bit codes, then IC7-2 output can not uprise-IC4-2 output keeps high, is charged to when being enough to make DW5 to puncture at C8, IC7-1 output high level makes total clear circuit IC8-1 of main frame, C9, R13 produce quenching pulse.Constant is got 0.1S and is got final product bigger littler not hindering during R12C8.

Be not difficult to find out according to above analysis: can under the control of logical circuit, timesharing use X3, X4 multifunctional signal line in order to make each functional circuit, must have:

R13C9 (R13C10)＜R5C5＜R4C12＜R11C7≤2 second.

Certainly, user's handset shown in Figure 2, password setting, identification circuit in its dotted line MM frame can also be designed circuit as Fig. 3, Fig. 4, Fig. 5, Fig. 6 structure according to same principle.

Embodiment 2, Fig. 3 is reached a password identification circuit of forming with door by the R-S trigger, the S of R-S trigger F1-1 holds the D end of IC26-1 in suitable Fig. 2 MM frame, it connects the output of handset room number identification circuit, the input of the Q termination of F1-1 and door F2-1, another input of F2-1 is received the corresponding output end of Fig. 2 atom machine decoder IC23 by the decimal system value of this password, the output of F2-1 is the output of first password, it is connected on the S end of the R-S trigger F1-2 that constitutes second password ..., the connection of all the other every passwords is identical with first.The output with door (F2-2) of last password connects the independently S end of R-S trigger F1-3, and the Q of F1-3 holds the Q end of IC26-2 in suitable Fig. 2 MM frame, and it is connected on the positive pole of Fig. 2 diode D11.The 14th pin of R termination Fig. 2 atom machine decoder IC23 of all R-S triggers of formation password.

Embodiment 3, and Fig. 4 is made of transistor, and triode BG1, diode DR1, DR2 and resistance R P1 form first password setting, identification circuit.The D of IC26-1 end in the suitable Fig. 2 MM of the collector electrode of the BG1 frame, it connects the output of handset room number identification circuit, base stage links to each other with the end of RP1, the other end of RP1 links to each other with the negative pole of DR1, DR2, wherein, the positive pole of DR1 is received the corresponding output end of Fig. 2 atom machine decoder IC23 by the decimal system value of this password, and the positive pole of DR2 connects the emitter of BG1, and DR2 and RP1 form the self-insurance path after the BG1 conducting.The emitter of BG1 is as the output of first password, and it is received on the collector electrode of the triode BG2 that constitutes second password ... the connection of all the other every passwords is identical with first.The emitter of the triode of last password (BG2) is equivalent to the Q end of IC26-2 in Fig. 2 MM frame, and it is connected on the positive pole of Fig. 2 diode D11.

Embodiment 4, and Fig. 5 is that controllable silicon constitutes cryptochannel, and it belongs to the simplest a kind of.The anode of SRC1 is equivalent to the D end of IC26-1 in Fig. 2 MM frame, it connects the output of handset room number identification circuit, the grid of SRC1 is by the corresponding output end of the decimal system value map interlinking 2 atom machine decoder IC23 of this password, the negative electrode of SRC1 is the output of first password, and it connects the anode of the controllable silicon SRC2 of second password ... the silicon controlled connection of all the other every passwords is identical with first.The negative electrode that constitutes the controllable silicon (SCR2) of last password is equivalent to the Q end of IC26-2 in Fig. 2 MM frame, the positive pole of its map interlinking 2 diode D11.

Embodiment 5, Fig. 6 by or door, with the password identification circuit formed of door, its essence is a kind of variation of embodiment 3 (Fig. 4).Constitute the D end that first password and input door G1-1 are equivalent to IC26-1 in Fig. 2 MM frame, it is connected on the output of handset room number identification circuit, another input termination of G1-1 or the output of door G2-1, the input of G2-1 is by the corresponding output end of the decimal system value map interlinking 2 atom machine decoder IC23 of this password, and another input of G2-1 is connected on the output of G1-1.Simultaneously the output of G1-1 still is the output of this password, and it is connected on and constitutes on second password and input door G1-2 ..., the connection of all the other every passwords is identical with first.The output with door (G1-2) of last password is equivalent to the Q end of IC26-2 in Fig. 2 MM frame, and it is connected on the positive pole of Fig. 2 diode D11.

Though it is different more than to constitute the mode of password, their operation principle is the same substantially with the operation principle of the circuit shown in Fig. 2 MM frame.What need point out a bit simultaneously is, because all there is tube voltage drop in transistor when conducting, so embodiment 3 (Fig. 4), embodiment 4 (Fig. 5) circuit are not suitable for the system of low pressure (as 5V) or multidigit password, otherwise system's cisco unity malfunction.

Be the example explanation only in the above-described embodiments with " rear-mounted two passwords ".In fact, password is forward and backward put all can, the forward type structure is with rear-mounted identical, but, during use with rear-mounted more convenient.Also optional one, two, three, four, five of the figure places of password or more multidigit simultaneously ... really, the many more confidentiality of figure place are good more, but generally have 2～3 just enough.

Claims

1. antitheft intercom of coding type building, comprise a main frame and many user's handsets, wherein on user's handset decoding is arranged, identification circuit, it is characterized in that: user's handset room number identification circuit back also is connected to password setting, identification circuit, this circuit has the d type flip flop structure with independent clock, specific as follows: the D that constitutes the d type flip flop IC26-1 of first password terminates at the output Q end of the last d type flip flop of user's handset room number identification circuit IC25-2, the D of the d type flip flop IC26-2 of second password terminates at the output Q end of the d type flip flop IC26-1 of first password, and the rest may be inferred by analogy for it; The output Q end of the d type flip flop of the last password is the array output end of this user's room number, password, and it is by triode electronic switch T14 of the final control of an isolating diode D11 who is just connecing; The S end ground connection of forming all d type flip flops of password, on output valve that R terminates at original subscriber's handset decoder IC23 and the output (14 pin) that the zero clearing sign indicating number key assignments of host code circuit equates, the CP end of the d type flip flop of every password is received on the corresponding output end of original subscriber's handset decoder IC23 by the decimal system value of this password.

2. the antitheft intercom of coding type building according to claim 1, it is characterized in that: on the password link of user's handset also and connect a self-locking or dial type is deciphered switch AN5 temporarily, Q end and the password setting of the output IC25-2 of the contact of interim deciphering switch AN5 and the room number identification circuit of former handset, the tie point of the D end of the input IC26-1 of identification circuit links to each other, another contact of AN5 and the positive pole of a diode D12 join, the negative pole of this diode and another positive pole are connected on room number, the negative pole of the diode D11 of password combination output joins, triode electronic switch T14 of the final control of the phase contact of these two diode cathodes.

3. antitheft intercom of coding type building, comprise a main frame and many user's handsets, wherein on user's handset decoding is arranged, identification circuit, it is characterized in that: the room number identification circuit back of user's handset also is connected to password setting, identification circuit, this circuit have the R-S trigger and and door, specific as follows: the S that constitutes the R-S trigger F1-1 of first password terminates at the output of original subscriber's handset room identification circuit, the input of double input end of the Q termination of R-S trigger F1-1 and door F2-1 is received the corresponding output end of atom machine decoder IC23 with another input of door F2-1 by the decimal system value of this password; With the output of door F2-1 be exactly the output of first password, it receives the S end of the R-S trigger F1-2 that constitutes second password, the constituted mode of all the other every passwords is identical with first; S with a R-S trigger of output termination door F2-2 F1-3 last password holds, and the Q of this R-S trigger end is the array output end of this user's room number, password, it is by triode electronic switch T14 of the final control of an isolating diode D11 who is just connecing, at last the R of all R-S triggers is terminated among the atom machine decoder IC23 one with output that main frame zero clearing sign indicating number key assignments equates on.

4. the antitheft intercom of coding type building according to claim 3, it is characterized in that: on the password link of user's handset also and connect a self-locking or dial type is deciphered switch AN5 temporarily, Q end and the password setting of the output IC25-2 of the contact of interim deciphering switch AN5 and the room number identification circuit of former handset, the tie point of the D end of the input IC26-1 of identification circuit links to each other, another contact of AN5 and the positive pole of a diode D12 join, the negative pole of this diode and another positive pole are connected on room number, the negative pole of the diode D11 of password combination output joins, triode electronic switch T14 of the final control of the phase contact of these two diode cathodes.

5. antitheft intercom of coding type building, comprise a main frame and many user's handsets, wherein on user's handset decoding is arranged, identification circuit, it is characterized in that: user's handset room number identification circuit back also is connected to password setting, identification circuit, this circuit comprises and door, or door, specific as follows: as to constitute the double input end of first password and the output of the input termination atom machine room number identification circuit of door G1-1, with another input double input end of termination of door G1-1 or the output of door G2-1, or the input of door G2-1 is received on the corresponding output end of atom machine decoder IC23 by the decimal system value of this password; Or the input of another input of door G2-1 and the double input end that constitutes second password and door G1-2 and connect after, receive first password and output door G1-1, the constituted mode of all the other every passwords is identical with first; Last password and output door G1-2 are the array output end of this user's room number, password, and it is by triode electronic switch T14 of the final control of an isolating diode D11 who is just connecing.

6. the antitheft intercom of coding type building according to claim 5, it is characterized in that: on the password link of user's handset also and connect a self-locking or dial type is deciphered switch AN5 temporarily, Q end and the password setting of the output IC25-2 of the contact of interim deciphering switch AN5 and the room number identification circuit of former handset, the tie point of the D end of the input IC26-1 of identification circuit links to each other, another contact of AN5 and the positive pole of a diode D12 join, the negative pole of this diode and another positive pole are connected on room number, the negative pole of the diode D11 of password combination output joins, triode electronic switch T14 of the final control of the phase contact of these two diode cathodes.

7. antitheft intercom of coding type building, comprise a main frame and many user's handsets, wherein on user's handset decoding is arranged, identification circuit, it is characterized in that: user's handset room number identification circuit back also is connected to password setting, identification circuit, this circuit comprises by triode, diode structure, specific as follows: the collector electrode that constitutes the triode BG1 of first password connects the output of atom machine room number identification circuit, the base stage of BG1 links to each other with the end of resistance R P1, the other end of RP1 and two isolating diode DR1, the negative pole of DR2 links to each other, wherein the positive pole of DR1 is received the corresponding output end of atom machine decoder IC23 by the decimal system value of this password, the positive pole of DR2 connects the emitter of BG1, DR2 and RP1 form the self-insurance path after the BG1 conducting, the emitter of BG1 is as the output of this password, it is connected on the collector electrode of the triode BG2 that constitutes second password, the constituted mode of all the other every passwords is identical with first, the emitter of the triode of last password is exactly this user's room number, the array output end of password, it is by triode electronic switch T14 of the final control of an isolating diode D11 who is just connecing.

8. the antitheft intercom of coding type building according to claim 7, it is characterized in that: on the password link of user's handset also and connect a self-locking or dial type is deciphered switch AN5 temporarily, Q end and the password setting of the output IC25-2 of the contact of interim deciphering switch AN5 and the room number identification circuit of former handset, the tie point of the D end of the input IC26-1 of identification circuit links to each other, another contact of AN5 and the positive pole of a diode D12 join, the negative pole of this diode and another positive pole are connected on room number, the negative pole of the diode D11 of password combination output joins, triode electronic switch T14 of the final control of the phase contact of these two diode cathodes.

9. antitheft intercom of building, on user's handset decoding is arranged, identification circuit, it is characterized in that: user's handset room number identification circuit back also is connected to password setting, identification circuit, this circuit is by SCR structure, specific as follows: the anode that constitutes the controllable silicon SRC1 of first password connects the output of atom machine room number identification circuit, grid is received the corresponding output end of atom machine decoder IC23 by the decimal system value of this password, the negative electrode of controllable silicon SRC1 is the output of this password, it is received on the anode of the controllable silicon SRC2 that constitutes second password, and the rest may be inferred by analogy for it; The negative electrode of the controllable silicon SRC2 of last password is the array output end of this user's room number, password, and it is by triode electronic switch T14 of the final control of an isolating diode D11 who is just connecing.

10. the antitheft intercom of coding type building according to claim 9, it is characterized in that: on the password link of user's handset also and connect a self-locking or dial type is deciphered switch AN5 temporarily, Q end and the password setting of the output IC25-2 of the contact of interim deciphering switch AN5 and the room number identification circuit of former handset, the tie point of the D end of the input IC26-1 of identification circuit links to each other, another contact of AN5 and the positive pole of a diode D12 join, the negative pole of this diode and another positive pole are connected on room number, the negative pole of the diode D11 of password combination output joins, triode electronic switch T14 of the final control of the phase contact of these two diode cathodes.