CN2061585U - Security electronic puzzle lock - Google Patents

Abstract

The utility model discloses a security electronic code lock, which makes use of an existing calculator as a main component after refitting, a keyboard is used for inputting, and a liquid crystal display panel is used for displaying. A plurality of lines are led out from a calculator to be connected with a comparator and an arbiter, the utility model is also provided with a shutter, and the inner side of the shutter is provided with a door sealing switch and a time delay switch. When the shutter is opened, the time delay switch is connected, and the utility model can alarm exceeding the time limitation; when the shutter is closed and is blocked, the door sealing switch is connected, an electromagnet can attract an armature to seal the shutter, and the calculator starts to operate. The utility model has the advantages of small volume, light weight, low cost and little power consumption.

Description

Security electronic puzzle lock

The utility model relates to a kind of high secret electronic password lock, this electronic password lock both can be used for safety cabinet, the door lock that can be used as various important places again, the crypto control unit of senior instrument, instrument power, the password conversion of communication system and the control that is used for guard against theft and alarm system.

Now, the mechanical code lock that many types have been arranged, many electronic locks have also appearred, these electronic password locks generally can only change 1,000,000 times, there is not auxiliary memory storage, power consumption is big, the cost height, for example, the electronic lock that Chinese patent CN can arbitrarily change about a kind of password of proposition in " a kind of electronic password lock " for 87 2 No. 16604, it is to utilize bistable trigger-action circuit to form its gate circuit with interlock function to come the interior little pellet shot from a slingshot of control lock, and this electronic password lock generally has only the group of four figures, if will increase code bit number, then to increase the flip and flop generator unit, it is quite complicated that circuit will become, and this electronic lock function is few, and the scope of application is narrow.

Task of the present utility model is that a kind of high secret electronic password lock will be provided, and its password digital display work increases, and has the advantage that power consumption is little, cost is low, function is many, volume is little and simple to operate.

Task of the present utility model is finished in such a way; it utilizes existing electronic calculator calculation function fully; and parts such as keyboard, LCD panel and memory; earlier calculator is carried out suitable repacking; calculator after the repacking is contained in the shutter of this electronic password lock memory button With memory demonstration, cancel key

Be contained in the back side of lock, and the keyboard that other button is formed is contained in the front of lock with LCD panel, calculator has a plurality of leads to join with each input of comparator by turn respectively, comparator output terminal links to each other with arbiter again by turn, so just can be relatively to signal, differentiate, this calculator input keyboard is by 0 to 9 figure key, just, the negative sign key, decimal key and root key are formed, the liquid crystal display band just, the eight-digit number sign indicating number of negative sign and decimal point, the password of this electronic lock can have the conversion of kind more than 1,500,000,000, so it is high reequiping owing to utilization has calculator (for example EL-838) now of maintaining secrecy, so its cost reduces greatly.The electronic password lock that this height is maintained secrecy has a shutter, and a spring leaf is contained on the frame of shutter, and its end is fixing, and the other end is movable, a pin is arranged below the spring leaf.When shutter is opened; this pin is an end jack-up of spring leaf activity; spring leaf holds up connecting rod in the above; the other end of connecting rod is to pressing down; the delay switch button is switched on, and delay circuit is started working, if the shutter time of opening surpasses the predetermined time limit; delay circuit can carry a signal to give warning device immediately, and warning device sends sound, light alarm.After shutter is opened; import one group number or computing formula by keyboard; close shutter then, the contiguous spring leaf of pin extruding on shutter top, spring leaf is pushed down the shift knob of sealing up a door; thereby the switch of sealing up a door is switched on; calculator begins to drop into computing, the electromagnet action above the shutter, and shutter is sealed automatically; it can not be opened again, finishes up to computing.At this moment calculator is delivered to the number on the LCD panel and the password in the memory in the comparator bit by bit and is compared, if the number of input and internal memory is digital identical, arbiter will be exported the expression pulse of " correctly ", carry stable signal to give electromagnetic lock through corresponding monostable flipflop and buffering isolator circuit, the clutch operating of control electromagnetic lock, simultaneously correct indicator lamp is shinny, and coded lock is opened; If the number of input and the password not match of internal memory, arbiter will be exported the pulse of expression " mistake " and give other one group of monostable flipflop and buffering isolator, the mistake indicator lamp is shinny, sends sound, visual alarm simultaneously.

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is an elevation of the present utility model.

Fig. 2 is a back side of the present utility model setting drawing.

Fig. 3 is a circuit block diagram of the present utility model.

Fig. 4 is circuit theory diagrams of the present utility model.

Fig. 5 is a sectional view in the shutter of the present utility model.

Fig. 6 is delay circuit figure of the present utility model.

From Fig. 1 and Fig. 2 as can be seen; there is a shutter (1) the electronic password lock outside that this height is maintained secrecy; open this shutter (1) afterwards; just can see the keyboard (3) and the LCD panel (4) of calculator (2); some is inequality with general calculator (for example EL-838) for keyboard (3); it has only 0 to 9 figure key; just; negative sign and decimal key; clear key peace square key etc.; can import various numbers by keyboard (3); but because the password of internal memory should be maintained secrecy; can not allow the stranger know; so the storage function button of calculator (2) is retrofitted in the back side of electronic password lock; memory button (5) and memory show; memory cancel key (6) is the back side that is contained in lock; operating these buttons can be stored in password in the calculator (2); want to open the electronic password lock that this height is maintained secrecy; just must know the password figure of calculator (2) internal memory; otherwise be can not open it; because being one, the LCD panel (4) of calculator (2) just has; negative sign; the eight-digit number of mixed decimal point; add up to more than 1,500,000,000 6 thousand 9 hundred ten thousand kinds conversion; it is can not realize fully that this password will play at some game of chance; only can cause electronic password lock generation actuation of an alarm, so this coded lock confidentiality is very high.

Fig. 3 represents the electronic password lock circuit block diagram that this height is maintained secrecy; after calculator (2) is by keyboard (3) input number; the LCD panel (4) of counter (2) will illustrate the number of squeezing into; whether can check the input number is so immediately correctly also corrected at any time; firmly close shutter (1) then; calculator (2) begins to drop into computing; and a number of input is delivered to by turn with the number of interior storage, and comparator (7) compares; promptly the eight-digit number sign indicating number of new input and eight passwords in the memory are compared by turn, whether mixed decimal point is at last just than calibration to compare the bits per inch word again; negative sign.Because calculator (2) is to adopt seven strokes method to show every numeral, in order to compare the bits per inch word, just must compare the pulse voltage that each is drawn, therefore calculator (2) has many outlet lines to join with the input of comparator (7) respectively, corresponding stroke pulse voltage is delivered to comparator (7) by corresponding circuit and is compared whether it identical, so as long as each junior unit of comparator (7) is promptly passable with some simple NAND gate circuits, integrated circuit block 74LS series for example, when the input pulse of these two correspondences all is that high voltage is when promptly all being " 1 ", be output as " 0 ", otherwise output all is " 1 ".These some NAND gate junior units combinations is added some timesharing, along separate routes behind the control circuit, is promptly become reliably comparator (7) by turn.The arbiter (8) of this comparative result by forming by bistable trigger-action circuit, which kind of state overturns at last from this bistable trigger-action circuit is actually, judge the result of accumulative total, send the correct or wrong brief burst of expression then, this pulse enters different separately single-shot trigger circuits respectively and carries out broadening, and through the stable signal of buffering isolation level output.If the input number is correct, it just has the clutch operating that a signal is given electromagnetic lock, and is shown by " correctly " indicator lamp, thereby a lock is opened.If import number be and the internal memory password not match, the signal of expression " mistake " will enter superimposer, and guide sound, light warning device (9) produce action, and " mistake " indicator lamp is shinny.Fig. 4 is the detailed circuit schematic diagram of the secret electronic password lock of this height, it is to utilize the various calculation functions of existing calculator (2), and the effect of keyboard (3), LCD panel (4) and memory, do the confidentiality that not only can improve electronic password lock significantly like this, and can reduce cost widely.The way circuit figure of this digital operation part adopts 13 integrated circuit altogether, and they are respectively 74LS series and 555 series.

Fig. 5 is the interior sectional view of the secret electronic password lock shutter of this height (1).As can be seen from Figure; seal up a door switch (10) and delay switch (11) is to be placed on the side of shutter (1); connecting rod (12) one ends are pressed on the spring leaf (13); these spring leaf (13) one ends are movable; push down a pin (14) below it, and the other end of spring leaf (13) is fixed.When opening shutter (1); pin (14) projection; hold up the movable end of spring leaf (13); and spring leaf (13) lifts connecting rod (12); the other end of connecting rod (12) is subdued; place delay switch (11) below the connecting rod (12) to be under pressure and be switched on; delay circuit (15) is devoted oneself to work; if opening the back, shutter (1) surpasses delay period by the digital time of keyboard (3) input; delay circuit (15) will trigger warning device (9) and produce actuation of an alarm; therefore should turn off shutter (1) in the time of when operation, should noticing that delay period closes to an end, restart again after a time.After number is by keyboard (3) input; to shut shutter (1); and firmly one push away shutter (1) is blocked; pin (16) on shutter (1) top is squeezed in its contiguous spring leaf (17); the spring leaf of pressurized (17) application of force acts on the button of the switch of sealing up a door (10); the switch of sealing up a door (10) is connected; switch (10) is the crus secunda that is connected on single-shot trigger circuit (18) owing to seal up a door; the conducting of the switch so seal up a door (10) makes calculator (2) formally drop into computing; because there is individual electromagnet (16) shutter (1) top; coil (20) on the electromagnet (19) joins with the output of calculator (2); at this moment it has electric current input to begin to attract in the above armature; thereby shutter (1) is sealed up a door immediately automatically, finish to reopen shutter (1) until computing.Fig. 6 is the detail drawing of the delay circuit of this electronic password lock; as long as shutter (1) is opened; delay switch (11) is just connected; delay circuit (15) is started working; the numerical value of bypass condenser (21) is depended in the selection of delay period; therefore can suitably adjust delay period according to different situations, generally choosing time-delay at present was 30 seconds.

After installing the secret electronic password lock of this height; at first should carry out the storage of password; pressing the secondary memory continuously shows; memory cancel key (6); promptly the internal memory of calculator (2) is removed; open the shutter (1) of electronic password lock then; by one group of predetermined digital or operation result of keyboard (3) input; again by the memory button that once is contained in the electronic password lock back side (5); at this moment password has deposited in the interior memory of calculator (2); for the password of checking input whether with predetermined identical; can click memory again shows; memory cancel key (6); from LCD panel (4), can test the password that is just depositing in; find can not revise until meeting fully, click once more part Key, the eight-digit number sign indicating number of LCD panel (4) has disappeared, and shutter (1) is shut.It is as follows to open the secret electronic password lock concrete operations step of this height: open shutter (1), delay circuit (15) is started working, obtain set of number by one group of number of keyboard (3) input or through operational formula, shut shutter (1), firmly push away a little, the switch (10) of sealing up a door is switched on, calculator (2) drops into computing, the computing indicator lamp is shinny, by comparator (7) and arbiter (8) work judgement digital whether conforming to the password of internal memory of input, if conform to fully, correct indicator lamp is shinny, the clutch operating of signal of telecommunication control electromagnetic lock will have been opened electronic password lock like this; If do not conform to, the mistake indicator lamp will be shinny, meanwhile sends sound and light alarm.In the unlock operation process, when being about to reach, should shut shutter (1) in the time limit of time-delay, and open again subsequently, otherwise can automatically send sound, light warning, if at this moment can import correct number, can also cut off alarm signal.

This electronic password lock has used metric eight-digit number code, having added positive and negative number and decimal deparator changes, the digit conversion number of times can reach more than 1,500,000,000, its privacy degrees is higher, the unlock operation of this lock is also very easy, it also has a liquid crystal indicator, even input error also obtains correcting easily. The electronic password lock that this height is maintained secrecy is equipped with a shutter, can prevent that lock from being destroyed, and after opening the shutter overstepping the time limit, circuit can automatically produce and report to the police. In addition, this electronic password lock is to be powered simultaneously by AC power and chargeable battery, incessantly to the battery automatic charging, treats automatically outage after the battery abundance in AC power at ordinary times, is cut off when AC power like this, and electronic password lock still can Enough normally work. The power consumption of this electronic password lock is very little, and power consumption at ordinary times only has 0.2 watt. It uses the AC power output of 300 watts of thyristor installation controls, without relay element, the machinery-free contact occurs, and can not produce electric spark, and volume is little, in light weight, function is many, cost is low, the life-span is long and the simple characteristics of wiring so this electronic password lock also has.

Claims (5)

1; a kind of by electronic calculator (2); comparator (7); arbiter (8); warning device (9); the high secret electronic password lock that delay circuit (15) and electromagnetic lock are formed; it is characterized in that: it has a shutter (1); ordinary electronic calculator (2) after the repacking is by the inside in shutter (1); but memory button (5) and memory show; memory cancel key (6) is inlaid in the back side of lock; calculator (2) has many output circuits to join with the input of comparator (7) by turn respectively; comparator (7) output links to each other with arbiter (8) again by turn; switch of sealing up a door (10) and delay switch (11) are housed in the inboard of shutter (1); delay switch (11) is connected on the power supply input branch road of delay circuit (15), and the switch of sealing up a door (10) is connected on second pin of monostable flipflop (18).

2, according to the high secret electronic password lock of claim 1 defined, it is characterized in that: by turn comparator (7) by the combination of some NAND gate junior units add some timesharing, control circuit is formed along separate routes, and arbiter (8) is formed with bistable trigger-action circuit.

3, according to the high secret electronic password lock of claim 1 defined; it is characterized in that: delay switch (11) is an end of connecting rod (12) above the button; connecting rod (12) other end places on the spring leaf (13); the other end of spring leaf (13) is fixed; spring leaf (13) contacts with pin (14); after shutter (1) is opened; pin (14) jack-up spring leaf (13); spring leaf (13) holds up connecting rod (12); the other end of connecting rod (12) is to pressing down; delay switch (11) is connected, and delay circuit (15) is started working.

4; high secret electronic password lock according to claim 1 defined; it is characterized in that: the switch of sealing up a door (10) is near spring leaf (17); and spring leaf (17) is adjacent with pin (16); in the top of shutter (1) electromagnet (19) is arranged; its coil (20) joins with the output of calculator (2); after shutter (1) blocks; pin (16) extrusion spring sheet (17) on shutter (1) top; the spring leaf of pressurized (17) acts on the button of the switch of sealing up a door (10); the switch of sealing up a door (10) is connected; electromagnet (19) attracts armature, and shutter (1) is sealed.

5, according to the high secret electronic password lock of claim 3 defined, it is characterized in that: the delay period of delay circuit (15) by bypass condenser (21) numerical value determined.

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