CN102979381A

CN102979381A - Electronic coded lock with only one button

Info

Publication number: CN102979381A
Application number: CN 201110265987
Authority: CN
Inventors: 丁长来
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-05
Filing date: 2011-09-05
Publication date: 2013-03-20

Abstract

The invention discloses an electronic coded lock with only one button. The electronic coded lock comprises a code input circuit, the output end of the code input circuit is connected with the input end of a time-delay circuit, the output end of the time-delay circuit is connected with the input end of a code storage circuit, and the output end of the code storage circuit is connected with the input end of a driving circuit. The code input circuit comprises two input gate or negation gate circuits CC4001, the delay circuit comprises two monostable triggers composed of CC7556 timers, the code storage circuit comprises a double four-digit serial-in/parallel-out shifting register CC4015, and the driving circuit is driven by a relay. The electronic coded lock is simple in structure, low in cost, convenient and flexible to use, stable, reliable, and capable of being used in sites requiring electronic locks.

Description

A kind of electronic password lock that only has a button

Technical field

The present invention relates to a kind of coded lock, particularly a kind of electronic password lock.

Background technology

In daily life and work, the preservation of the safety precaution of dwelling house and department, the archive files of unit, financial statement and the data that some are individual solves mainly with the way that locks.Coded lock is very widely a kind of digital circuit of practical application; its major function is that some operation is encrypted protection; purpose is to avoid unauthorized person to use some facility or carry out unauthorized operation, for example all contains this coded lock in the ATM (Automatic Teller Machine) of bank, automatic vending machine, badge system or the safety cabinet.In today of electronic technology develop rapidly, the electronic password lock with the function such as burglar alarm replaces cylinder lock and number of password is few, the mechanical code lock of poor stability has been inexorable trend.Electronic password lock has the unrivaled superiority of mechanical lock, it not only can finish the function of lock itself, can also have several functions concurrently, such as memory, identification, warning etc., safe, cost is low, the advantage such as low in energy consumption, easy to operate is subject to increasing people the welcome of electronic password lock.But most of SCM Based design of the electronic password lock that uses at present, its cost height and reliability can not be guaranteed, circuit more complicated, performance underaction.

Electronic password lock is a kind ofly to come the work of control circuit or chip by Password Input, thus the closure of gauge tap, finish unblank, the electronic product of locking task.Present most coded lock adopts single-chip microcomputer to design, but the circuit more complicated, performance is underaction also, and cost compare height and reliability and safety are poor.The coded lock of amplifying out from the single-chip microcomputer basis also has infrared remote controlled code lock, speech electronic coded lock, intelligent cipher lock etc.They have stronger actual application value, and related technology comprises: infrared carrier wave data transmission technology, single-chip microcomputer control technology, infrared remote control system coding and decoding technique, circuit design and demonstration board manufacturing technology etc.In addition, the coded lock that has in addition remote monitoring function, the speech electronic coded lock of state-based machine, numerical ciphers controller with the integrated circuit composition, also have and adopt advanced EDA (electric design automation) technology, utilize the Novel electronic combination lock of Quartus II working platform and VHDL (VHSIC hardware description language) technical design.They possess that the coded lock volume is little, low in energy consumption, price is low, safe and reliable, have characteristics such as intelligent voice prompt, maintenance and upgrading be convenient.Has preferably application prospect.Therefore, electronic password lock be after coded lock development inexorable trend.

Summary of the invention

The purpose of this invention is to provide a kind of electronic password lock that only has a button, it is simple in structure, less cost, and convenient, flexible, reliable and stable.

The object of the present invention is achieved like this: a kind of electronic password lock that only has a button, comprise the Password Input circuit, the output of Password Input circuit links to each other with the input of delay circuit, the output of delay circuit links to each other with the input of password register circuit, the output of password register circuit links to each other with the input of drive circuit, described Password Input circuit comprises two input forward OR-NOT circuit CC4001, described delay circuit comprises two monostable flipflops that are made of the CC7556 timer, described password register circuit comprise two four bit strings enter/and go out shift register CC4015, described drive circuit is that relay drives.

Among the present invention, the unlocking signal of coded lock is comprised of a series of broad pulses and burst pulse, two nor gates among the CC4001 form flip and flop generator, be used for producing signal, trigger monostable flipflop and shift register by low level respectively, by two monostable flipflops of 7556 the electric circuit constitutes (delay circuit), determine the length of button time; A monostable flipflop determines to press the transient state time of a password number, and another monostable flipflop determines the transient state time by whole password number;

Two four bit strings enter/and when going out shift register work, the serial binary data are inputted from input, the output of left side trigger is as the data input of right adjacent trigger, namely as series number signal D7, D6, D5, D4, D3, D2, D1, D0 is from high-order D7 to status D0, deliver to successively the DA end of CC4015 by the clock sequence, through after first pulse, Q1a=D7, because following the number of digital D7 back is D6, then through after second clock pulses, the state of the first trigger moves into the second trigger, and the first trigger becomes new state, be Q2a=D7, Q1a=D6.By that analogy, work as Q4a=D7, Q3a=D6, Q2a=D5 is during Q1a=D4, before next clock pulses arrives, the data of Q4a should be delivered to another data input pin DB, thereby after next clock pulses is arrived, Q1b=D7, Q4a=D6, Q3a=D5, Q2a=D4, Q1a=D3.By that analogy, after 8 clock pulses, output state Q4b, the Q3b of 8 triggers, Q2b, Q1b, Q4a, Q3a, Q2a, Q1a and input digital D7, D6, D5, D4, D3, D2, D1, D0 are corresponding;

The output of password register circuit links to each other with the input of drive circuit, so that diode VD1～VD8 cut-off, thereby the triode conducting, electromagnetic relay coil K1 energising makes constant open contact K1-1 closed, connects electromagnet K2, thereby the tapered end in the K2 is opened.The triode front adds a diode, and effect is so that only have that triode could conducting during greater than 1.4V (being high potential) when diode left side voltage.Compared with prior art, beneficial effect of the present invention is: it is simple in structure, less cost, and convenient, flexible, reliable and stable.The present invention can be used for the occasion of demand electronic lock.

Description of drawings

Fig. 1 is control principle block diagram of the present invention.

Fig. 2 is circuit theory diagrams of the present invention.

The specific embodiment

A kind of electronic password lock that only has a button shown in Fig. 1-2, comprise the Password Input circuit, the output of Password Input circuit links to each other with the input of delay circuit, the output of delay circuit links to each other with the input of password register circuit, the output of password register circuit links to each other with the input of drive circuit, the Password Input circuit comprises two input forward OR-NOT circuit CC4001, delay circuit comprises two monostable flipflops that are made of the CC7556 timer, the password register circuit comprise two four bit strings enter/and go out shift register CC4015, drive circuit is that relay drives.

Among the present invention, the unlocking signal of coded lock is comprised of a series of broad pulses and burst pulse, and two nor gates among the CC4001 form flip and flop generator, are used for producing signal.When pressing compound button SB, its normal off contact 3-4 connects, and the H1 input becomes high level, output low level; When unclamping compound button SB, its normal off contact 1-2 connects, and the H2 input becomes high level, output low level.During the H1 output low level, trigger monostable flipflop: during the H2 output low level, flip-flop shift;

Delay circuit among the present invention is the monostable circuit that is made of CC7556, but the pulsewidth of Ui must be less than the pulsewidth of Uo, so add a RC differential circuit at the input of delay circuit, when Ui is broad pulse, Ui receives Vcc again after the RC differential circuit, to guarantee when the Ui trailing edge does not arrive

End is high level, and capacitor C plays coupling, prevents the unexpected saltus step damage components and parts of level;

Two low level trigger ends of CC7556 Control is brought in an output by flip and flop generator, and CC7556 has two outputs.Each data of the temporary stable state time control unlocking signal of a monostable flipflop, its output output unlocking signal is connected with the data input pin DA of CC4015; The temporary stable state time of another monostable flipflop is controlled the uncaging time of whole circuit, and uncaging time has surpassed the temporary stable state time that arranges, and CC4015 resets.And after CC4015 needs low level to trigger, the data of DA end input just can be deposited, therefore, trigger end CPA, the CPB of CC4015 links to each other with another output of flip and flop generator, unclamp SB after, the nor gate input is high level, output is low level, connects a phase inverter again, is high level just, trigger end is triggered, and data are deposited;

The binary data that the CC4015 parallel output is 8, if consistent with the password that arranges, the then triode conducting in the drive circuit, so that relay K 1 gets electronic work, electric shock K1-1 connects electromagnet K2, and lock is opened.If inconsistent with the password that arranges, then the triode in the drive circuit should end, and namely the base stage of triode is low level, and the AND circuit with eight diodes form has a diode current flow with regard to output low level, and triode should end, and lock can't be opened.Therefore, the anode of diode connects high level (power supply), and the negative electrode of diode also should connect high level.The level that the negative electrode of diode connects just can determine the coded lock password, and high level directly connects the negative electrode of diode in the binary data of CC4015 output, and low level connects the negative electrode of diode again by phase inverter.Generally, the password in the circuit sets, and the unlocking cipher of this circuit is 10010110.

The present invention is not limited to above-described embodiment; on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.

Claims

1. electronic password lock that only has a button, it is characterized in that, comprise the Password Input circuit, the output of Password Input circuit links to each other with the input of delay circuit, the output of delay circuit links to each other with the input of password register circuit, the output of password register circuit links to each other with the input of drive circuit, described Password Input circuit comprises two input forward OR-NOT circuit CC4001, described delay circuit comprises two monostable flipflops that are made of the CC7556 timer, described password register circuit comprise two four bit strings enter/and go out shift register CC4015, described drive circuit is that relay drives.