CN2786697Y

CN2786697Y - Anti-peeking disorder password input unit

Info

Publication number: CN2786697Y
Application number: CNU2005200091312U
Authority: CN
Inventors: 韩国中
Original assignee: CHONGQING BANGKE TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: CHONGQING BANGKE TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2005-04-08
Filing date: 2005-04-08
Publication date: 2006-06-07
Anticipated expiration: 2015-04-08
Also published as: WO2006105704A1

Abstract

The utility model relates to an anti-peeking disorder password input unit which is characterized in that each press key 1 on a keyboard is composed of a transparent body or a convex lens b and a non-transparent edge frame a fixed with the transparent body or the convex lens, wherein the bottom of the non-transparent edge frame is elastically contacted with a microswitch or a membrane switch 3 in a corresponding press key foot position on a switch plate 2 on the bottom of the non-transparent edge frame, and the position of the switch board corresponding to the transparent body or the convex lens is provided with a hole; a character displaying carrier 5 fixed on a main plate is below the open hole, and the output end of the microswitch or the membrane switch 3 forming a keyboard matrix is connected with a CPU input end on a main circuit plate to form a cipher input circuit. Because of the adoption of the structure, the utility model ensures input passwords not to be peeked and stolen by other people, and simultaneously, due to the adoption of the method that CPU controlled 0-9 character positions of press keys key assignments are randomly ranged in variable orders, the key assignment positions of the anti-peeking disorder password input unit is not fixed without any rules to follow, further enhancing peek and theft protecting functions.

Description

Prevent spying on out of order PIN PAD

Technical field

The utility model relates to finger-impu system, specifically is that a kind of employing passwords such as finance, security, commerce, postal service, telecommunications that are applicable to carry out person identification or use keyboard anti-ly to spy on out of order PIN PAD as what information typing instrument must be prevented again spying on.

Technical background

Along with the universal and Internet bank of ecommerce, the development of self-help bank, the use of POS machine and ATM is extensive day by day, and all trades and professions are also goed deep in the consumption that holds gradually.

The identification of adopting password to carry out personal identification is present method in common.

When people access to your password input unit input password in public places, be easy to be known to cause divulge a secret by other people.It is in rising trend to occur in the case that financial instrument industry client password is stolen in the last few years, because the fixed number word bit PIN PAD of generally using is when the user inputs password now, the lawless person often utilizes aside, back or utilize apparatus mode such as to peep a long way off and steal client password, clone's bank card folding, cause serious loss for country, collective and individual's property, also directly influenced the reputation of financial instrument industry.

Summary of the invention

The purpose of this utility model provides that out of order arrangement mode that a kind of button adopts convex lens imaging and subtense angle principle and button value 0-9 to be produced at random by control circuit designs anti-ly spies on out of order PIN PAD.

The technical solution adopted in the utility model is such: a kind ofly anti-spy on out of order PIN PAD, comprise the keyboard that is made of button and comprise by the password input circuit of key control and the main circuit board of the out of order at random assembled arrangement control circuit of button value 0-9 digit order number; Wherein the out of order arrangement control circuit of button value 0-9 digit order number comprises CPU, data-carrier store, decoder circuit, display driver circuit and nixie display; The output terminal of CPU is connected with serial communication interface by interface conversion circuit, is connected with display by decoder circuit and display driver circuit, is connected with power amplifier by sound circuit; It is characterized in that: the button on the keyboard is reached with its fixing opaque body frame by the transparent body or convex lens and constitutes, microswitch or the thin film switch Elastic Contact that has on the corresponding key placement of foot on the switching motherboard of the bottom of opaque body frame and its bottom wherein, the corresponding transparent body of switching motherboard or the perforate of convex lens position, the below of perforate are that the character that is fixed on the mainboard shows carrier; The described microswitch of the keyboard matrix that constitutes or the output terminal of thin film switch and the input end of the CPU on the main circuit board connect and compose the password input circuit.

The utility model has the advantages that clearly, promptly because the utility model is by the button that adopts convex lens imaging and subtense angle principle design, to input password during use, can only in certain visual angle, vertically face the key face, could see button below character clearly by the transparent body or convex lens and show the numeral that carrier shows, depart from certain angle, because the change of subtense angle or focal length, the character that shows in the button presents to be seen complete or cannot see, even can only see because of the beyond all recognition font of distortion, thereby the password of having guaranteed input can not spied on by other people and to steal.In addition, control circuit of the present utility model adopts the button value 0-9 of CPU control to produce out of order sign indicating number at random, show that by character carrier shows, the position of key assignments is unfixing, combination and variation is many, repetition rate is low, stopped because of memory touching position conjecture password, thereby preventing further that password from being spied on steals.

Description of drawings

Said structure of the present utility model can further specify by the embodiment that accompanying drawing provides.

Fig. 1. prevent spying on out of order PIN PAD keyboard structure diagrammatic cross-section;

Fig. 2 prevents spying on out of order PIN PAD keyboard structure vertical view;

Fig. 3. the motherboard circuit circuit block diagram;

Fig. 4. prevent spying on out of order PIN PAD cpu control circuit figure;

Fig. 5. prevent spying on out of order PIN PAD displaying principle figure;

Fig. 6. prevent spying on out of order PIN PAD communication interface figure;

Fig. 1. in: 1.---button, a.---nontransparent of button, the b.---transparent body or convex lens body, c.---------------character shows carrier, 6.---fixedly the bolt of keypad, switching motherboard, main circuit board, the 7.---keyboard of main circuit board, 5. of microswitch on the switching motherboard or thin film switch, 4. of switching motherboard, 3. of button pin, 2..

Specific embodiments:

Referring to accompanying drawing, in the embodiment of the indefiniteness that accompanying drawing provides, the button 1 on keyboard 7 has by making a frame with non-transparent material, and the centre is inlaid with the transparent body or convex lens body b form part; Its transparent body or convex lens lower surface to character shows the distance of carrier 5 by bolt 6 location, and distance be in the 30mm or visible angle＜80 °, prevents the requirement spied on to meet.Character shows that carrier 5 and main circuit board 4 link into an integrated entity.The button below is the switching motherboard 2 in the perforate of form corresponding position, and microswitch or thin film switch 3 are housed above the plate.During button pressed, button pin c pushes corresponding switch, and turning circuit is realized the input of instruction.The switching motherboard below is a main circuit board 4, be equipped with on the plate with button form corresponding characters and show carrier 5, for guaranteeing that numeral shows clear, eye-catching in any environment, and debate knowledge easily, this example adopts the charactron that links into an integrated entity with main circuit board, the font that charactron shows is driven by control circuit, and is randomly ordered.For the anti-requirement of spying on, guarantees suitable focal length and subtense angle, form is located by set bolt 6 to the distance of charactron, and to make keyboard 7, button 1, switching motherboard 2, main circuit board 4 be an integral body.

Character shows that carrier can be the card that is printed on character.

Shown in Fig. 2 .3.4.5, the control circuit on the main circuit board comprises CPU (U ₂), in the enforcement, U ₂Adopt AT89CC52, the out of order program of burning in CPU has the keyboard K (7) of 14 buttons, has decoding scheme U ₁, in the enforcement, U ₁The decoder circuit that adopts 74LS145 to constitute, display driver circuit U ₃Adopt MC1413, T in the enforcement ₁-T ₁₀The character that adopts triode 9012 to constitute shows the carrier driving circuit.The output terminal of display driver circuit shows that with character each control end of carrier is connected, and realizes the demonstration of character respectively.CPU (U ₂) serial communication end RXD and TXD be connected to the serial communication change-over circuit and realize that the terminating machine or the PC that are connected with the outside carry out serial data transmission.

The realization that button value 0-9 digit order number is out of order is at U by burning ₂The random code that interior out of order program produces combines, because specific out of order computing, the key assignments 0-9 permutation and combination of Chan Shenging has nothing in common with each other irregular seeking at random.

Work as U ₂Detect terminating machine or PC and send when importing cipher instruction U ₂Produce one group of 0-9 key assignments sign indicating number immediately at random, be sent to code translator U ₁Again through code translator U ₁To display driver circuit T ₁-T ₁₀, drive the demonstration carrier and show, when the user shows that according to character the key assignments of carrier demonstration carries out the password input operation, U ₂Can give record according to the key assignments of keyboard matrix K record, the password input operation finishes, after confirming, and U ₂The password of record is transferred to terminating machine or PC by communication interface.At this moment, the utility model is in waiting status again, to the next operating cycle.

Claims

1, a kind ofly anti-spies on out of order PIN PAD, comprise the keyboard (7) that constitutes by button (1) and comprise by the password input circuit of key control and the main circuit board (4) of the out of order at random assembled arrangement control circuit of button value 0-9 digit order number; Wherein the out of order arrangement control circuit of button value 0-9 digit order number comprises CPU, data-carrier store U5, decoder circuit U1, display driver circuit U3 and nixie display; The output terminal of CPU is connected with serial communication interface by interface conversion circuit, is connected with display by decoder circuit and display driver circuit, is connected with power amplifier by sound circuit; It is characterized in that: the button (1) on the keyboard (7) is reached with its fixing opaque body frame (a) by the transparent body or convex lens (b) and constitutes, wherein the switching motherboard (2) of the bottom of opaque body frame and its bottom is gone up microswitch or thin film switch (3) Elastic Contact that has on the corresponding key placement of foot, the corresponding transparent body of switching motherboard or convex lens (b) position perforate, the below of perforate are that the character that is fixed on the mainboard shows carrier (5); The described microswitch of the keyboard matrix that constitutes or the output terminal of thin film switch (3) and the input end of the CPU on the main circuit board connect and compose the password input circuit.

2, according to claim 1ly anti-spy on out of order PIN PAD, it is characterized in that: character shows the card that carrier (5) adopts the charactron that links into an integrated entity with main circuit board or employing to be printed on character.