CN2425166Y

CN2425166Y - Electronic door lock using IC card

Info

Publication number: CN2425166Y
Application number: CN 98232802
Authority: CN
Inventors: 何清海
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-15
Filing date: 1998-06-15
Publication date: 2001-03-28
Anticipated expiration: 2008-06-15

Abstract

The utility model relates to an electronic door lock with an IC card. An I/O jack of a circuit of the door lock is connected with a storage of the door lock. When an IC card type key is inserted into the electronic door lock, the cipher of the IC card type key can be conveyed into a comparer to be compared with the cipher of the storage; if the cipher is correct, a synchronous pulse circuit enable a frequency divider to be in operation to sent out an unlocking signal to an unlocking circuit. The utility model has the advantages that the memorization of the cipher is not needed, the loss is not easy, the decryption is very difficult, the security is strong, the use is convenient, and the cost is low.

Description

The IC-card electronic lock

The utility model relates to a kind of IC-card electronic lock.

Existing door lock, various in style, but most defective or deficiency that exists in various degree.Mechanical door lock, though simple in structure, owing to be subjected to structural limitations, function is few, can not realize automatic control, can't write down the unlocking person data; Key is replicated easily, and confidentiality is poor; Often do the moving rotation of button when opening the door, effort, key also fractures easily; Tapered end directly links to each other with the lock body, is easily pried open or bores out etc., can not well play safety effect; Can't point out door whether reliably to lock at closing time; Install, use all inconvenient.Magnetic card door latch structure complexity, the cost height, maintenance technology requires high; Because magnetic card adopts the magnetic recording mode, thereby need strict antimagneticly, otherwise data lose easily, and application life is also short.The button cipher door lock needs operation keyboard, often stays trace easily on the button that uses, and password easily is decrypted; If the password figure place is many, then be difficult for memory; Key board is bigger, and as the people is arranged at one's side, password easily is found and gives away secrets when unblanking.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of password to need not memory, be difficult for losing, and extremely difficult the decoding, confidentiality is extremely strong, and is easy to use, the button cipher door lock that cost is low.

The purpose of this utility model can reach by following measure:

A kind of IC-card electronic lock, comprise door lock circuit, this door lock circuit comprises unlock circuit (8) and power supply, its special character is: the termination that the output of the door lock memory (4) of described door lock circuit and I/O socket (6) link to each other with IC-card formula key (5) output connects the input of comparator (3) respectively, and another road output of described door lock memory (4) connects unlock circuit (8); The output one tunnel of described comparator (3) directly connects frequency divider (2), and another road connects frequency divider (2) through clock circuit (1); The output of described frequency divider (2) connects the pulse input end of the IC-card formula key (5) of unlock circuit (8), door lock memory (4) and I/O socket (6) respectively; The output of described unlock circuit (8) is inhaled moving winding (7) with dead bolt and is linked to each other; Described door lock memory (4) is made of memory U4, and described comparator (3) is made of comparator U3, and the data output end of memory U4 connects the data input pin of comparator U3; Described clock circuit (1) comprises impulse generator U1, frequency divider (2) is made of frequency divider U2, the road pulse output of described comparator U3 connects the input of frequency divider U2, and another road pulse output connects the clock terminal of frequency divider U2 through controllable silicon SR, impulse generator U1; Described dead bolt is inhaled moving winding (7) and is comprised dead bolt suction moving winding KJ.

Unlock circuit of the present utility model (8) can be made of triode BG1, BG2, and the emitter stage of triode BG1 connects the colelctor electrode of triode BG2, and the base stage of triode BG1, BG2 connects the output of memory U4 and frequency divider U2 respectively.

Door lock circuit of the present utility model can comprise overvoltage crowbar, and this overvoltage crowbar is made of piezo-resistance FR and double direction diode SD, and described piezo-resistance FR is connected to the supply terminals of I/O socket (6), and described double direction diode SD and power supply also connect.

Door lock circuit of the present utility model also can comprise the good warning circuit of non-locking door (10), and it is made of speech IC U6, the input termination switch K2 of speech IC U6, its output termination loudspeaker L.

The two ends that dead bolt of the present utility model is inhaled moving winding KJ can and meet diode D.

The accompanying drawing drawing is described as follows:

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

Fig. 2 is the theory diagram of the good warning circuit of the utility model non-locking door, music doorbell circuit;

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

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1-3, the utility model door lock circuit comprises door lock memory 4, and it has identical circuit structure with encryption memory in the IC-card formula key 5.When IC-card formula key 5 was inserted by the I/O socket 6 of door lock, memory U4 was communicated with comparator 3, and under the lock-out pulse effect, password is exported by turn, and door lock memory 4 mainly is made of memory U4, and memory U4 can adopt 1024 or the memory of multidigit more.IC-card formula key 5 can adopt the structure memory identical with memory U4.One of pulse of code data output, and comparator 3 be among the comparator U3 with memory U4 in the password number compare.4 pin of memory U4 are that code data sends end, and its transmission with unlock circuit 8 input that finishes links to each other, and this end becomes high level after code data sends.Comparator U3 control section adopts XOR gate CD4070 integrated circuit to compare by turn, wherein 1,2,3 pin are a complete XOR gate, 4,5,6 pin are another complete XOR gate, two XOR gates can in parallelly use, to improve circuit reliability, wherein 1,6 pin link to each other, and 2,5 pin link to each other, output 3 pin are through controllable silicon SR control clock circuit 1, i.e. 4 pin of clock-pulse generator U1.The output 4 foot control system frequency dividers 2 of comparator U3, i.e. 11 pin of frequency divider U2.When password is inequality in the password of key 5 and the lock, comparator U3 two XOR gate outputs 3 pin will become high level, triggering and conducting controllable silicon SR, thereby blockade clock-pulse generator U1; 4 pin of comparator U3 become high level makes frequency divider U2 zero clearing, and frequency divider U2 quits work.When the password of key 5 is identical with password in the lock, comparator U3 two XOR gate outputs 3 pin will become low level, triggering and conducting controllable silicon SR, and password is identical, not conducting of controllable silicon SR, frequency divider U2 works.Frequency divider U2 can adopt CC4020 14 digit pulse branch frequency circuits to detect the number of pulses of clock-pulse generator U1.When umber of pulse reaches when unblanking umber of pulse, prove that key cipher is correct, 15 pin of frequency divider U2 become high level, send unlocking signal to unlock circuit 8.Otherwise when wherein both have an impulse circuit not simultaneously, comparator U3 exports negative pulse, and clock-pulse generator U1 does not work, and does not send out pulse, lockout circuit.Frequency divider U2 has the effect of shaping pulse, pulse distribution, branch lock frequency divider U2 lock-out pulse simultaneously, and when door lock memory U4 code data sent, its signal pins became high level, made the triode BG1 conducting in the unlock circuit 8; Frequency divider U2 sends unlocking signal, make triode BG2 conducting after, just can make dead bolt inhale suction moving winding KJ adhesive in the moving winding 7, open door lock.This is equivalent to one two input and door in fact.The good alarm circuit 10 of non-locking door is that L forms by speech IC U6 K switch 2 and loudspeaker 11 mainly, and when non-locking door was good, dead bolt was long or too short, with dead bolt K switch 2 closures of interlock mutually, sends the voice suggestion signal.As " note that non-locking door is good " etc.Music doorbell circuit 9 is made up of voice integrated package U5 and key switch K1 and loudspeaker L.Press K1, trigger voice integrated package U5 output voice.As " hello, please open the door! " wait voice.K switch 3 is the master switch of power supply E, and when IC-card formula key inserted door lock, K switch 3 was just closed, so have the effect that prevents that the door lock mistake from opening and economizing on electricity.Among the utility model embodiment, impulse generator U1 can adopt LM555, and also available LM556 or other pulse shaping circuit are formed;

Frequency divider U2 can adopt CC4020, and also available CC4024, CC4040 or other counter/frequency divider is formed;

Comparator U3 can adopt CD4070 or other any XOR gate composition all can;

Memory U4 can adopt any memory to form; Voice integrated package U5, speech IC U6 can select for use any speech IC or voice alarm circuit to form according to needs;

Unlock circuit also can adopt AND circuit to form.

The utility model compared with prior art has following advantage:

1, adopt the integrated memory of rewriting of IC to make storage medium, have upper kilobit or multidigit password more, close Code is difficult the decoding extremely, and confidentiality is extremely strong;

2, code data need not memory, is difficult for losing, and is easy to use, safe and reliable;

3, simple in structure, cost is low;

4, be convenient to realize automatic control system;

5, can record the unlocking person data, arbitrarily the Modify password data;

6, can have the several functions such as the good warning of non-locking door, burglar alarm and voice doorbell.

Claims

1, a kind of IC-card electronic lock, comprise door lock circuit, this door lock circuit comprises unlock circuit (8) and power supply, it is characterized in that: the termination that the output of the door lock memory (4) of described door lock circuit and I/O socket (6) link to each other with IC-card formula key (5) output connects the output of comparator (3) respectively, and another road output of described door lock memory (4) connects unlock circuit (8); The output one tunnel of described comparator (3) directly connects frequency divider (2), and another road connects frequency divider (2) through clock circuit (1); The output of described frequency divider (2) connects the pulse input end of the IC-card formula key (5) of unlock circuit (8), door lock memory (4) and I/O socket (6) respectively; The output of described unlock circuit (8) is inhaled moving winding (7) with dead bolt and is linked to each other; Described door lock memory (4) is made of memory U4, and described comparator (3) is made of comparator U3, and the data output end of memory U4 connects the data input pin of comparator U3; Described clock circuit (1) comprises impulse generator U1, frequency divider (2) is made of frequency divider U2, the road pulse output of described comparator U3 connects the input of frequency divider U2, and another road pulse output is through controllable silicon SR, and impulse generator U1 connects the clock terminal of frequency divider U2; Described dead bolt is inhaled moving winding (7) and is comprised dead bolt suction moving winding KJ.

2, IC-card electronic lock as claimed in claim 1, it is characterized in that: described unlock circuit (8) is made of triode BG1, BG2, the emitter stage of triode BG1 connects the colelctor electrode of triode BG2, and the base stage of triode BG1, BG2 connects the output of memory U4 and frequency divider U2 respectively.

3, IC-card electronic lock as claimed in claim 1; it is characterized in that: described door lock circuit comprises overvoltage crowbar; this overvoltage crowbar is made of piezo-resistance FR and double direction diode SD; described piezo-resistance FR is connected to the supply terminals of I/O socket (6), and described bilateral diode SD and power supply also connect.

4, as claim 1 or 2 or 3 described IC-card electronic locks, it is characterized in that: described door lock circuit comprises the good warning circuit of non-locking door (10), it is made of speech IC U6, the input termination switch K2 of speech IC U6, its output termination loudspeaker L.

5, IC-card electronic lock as claimed in claim 3 is characterized in that: described dead bolt is inhaled the two ends of moving winding KJ and is connected to diode D.