CN209433465U - A kind of PIN PAD - Google Patents

Abstract

The utility model provides a kind of PIN PAD, solves the problems, such as that existing PIN PAD does not have anti-peeping function.A kind of PIN PAD, including input board and processing unit；The processing unit is electrically connected the input board；The input board includes turntable, and the side wall of the turntable is equipped with enter key and several interference keys.Even if a kind of PIN PAD of the utility model makes other people or machine in visible Password Input process by the setting of enter key and interference key, it is also difficult to obtain password, increase the safety of Password Input process；Setting by interfering output end increases the anti-of this PIN PAD and cracks performance, and interference cracks password, increases the complexity of password, improve the security performance of this PIN PAD.

Description

A kind of PIN PAD

Technical field

The utility model belongs to coded lock technology field, and in particular to a kind of PIN PAD.

Background technique

In the modern life, people increasingly pay attention to safety, especially in the storage of some important items, so more It is selected come more persons and loads onto coded lock or the similar Password Input for needing password that could open on door, cabinet and other items Device only inputs correct password and then opens cabinet by taking cabinet as an example.

In actual use, for example, door, may there is the third party to peep or the third party during inputting password The password that lower input is used a hidden recorder using machinery equipment acts on PIN PAD forfeiture, does not play the role of protection not only, also wave Wealth is taken.

Utility model content

The utility model aim is to provide a kind of PIN PAD that it is not anti-peeping to solve existing PIN PAD The problem of function.

The technology employed by the present utility model is

A kind of PIN PAD, including input board and processing unit；

The processing unit is electrically connected the input board；

The input board includes turntable, and the side wall of the turntable is equipped with enter key and several interference keys.

Even if making other people or machine in visible Password Input process by the setting of enter key and interference key, it is also difficult to obtain Password is taken, the safety of Password Input process is increased.

Preferably, the enter key is equipped with heater.

Keep the surface temperature of enter key different from interference key by carrying out heating to enter key, and then the position of confirmation input key It sets, easy to use, confirmation is accurate.

Preferably, the surface roughness of the enter key be greater than/be less than the interference key.

Touch input key is different from feel after interference key, and then the position of confirmation input key, and easy to operate, confirmation is accurate, Simultaneously without extras, processing and manufacturing is simple.

Preferably, the movable/fixed connection turntable of the enter key.

Enter key is not identical as the connection type of interference key and turntable in the connection type of turntable after touch, and then confirms The position of enter key, easy to use, confirmation is accurate.

Preferably, the input board further includes dial, and the dial is arranged below the turntable, the dial It is upper to be equipped with several scales around the turntable.

The type of scale is more, arbitrarily can select or combine, and is determined according to actual use situation, meeting difference makes The hobby of user, extends use scope.

Preferably, be equipped with driving switch below the dial, the turntable by pass through the shaft of the dial with The driving switch is connected, and the shaft is electrically connected with the driving switch；

The driving switch be equipped with output circuit, the output circuit include the first common end and with the scale one by one Corresponding output end, first common end are electrically connected the processing unit, the output end electrical connection by self-resetting switch The processing unit；

Protection cap is equipped with above the dial, described protection cap one end and the dial are hinged, and the protection cap is another One end is equipped with opening.

Driving switch carries shaft, dial and turntable, is allowed to connect into an entirety, while self-resetting switch being inputted Signal pass to processing unit；Output circuit and reception circuit form complete circuit, the signal that self-resetting switch is inputted It is transferred to processing unit；The quantity and scale of output end correspond, and make the value on scale that can be transmitted to processing unit；Protection It covers and further shields prying through for other people or machine during Password Input, improve the safety of this PIN PAD Energy.

Preferably, the dial is equipped with order button and numerical value button；

The open end of the protection cap is arranged in described instruction button, and described instruction button includes initial value button and increase It is worth button, the initial value button and the value added button are electrically connected with the processing unit；

The numerical value button is arranged between the hinged end of the protection cap and the turntable, and the numerical value button includes pressing Button one, button two and button three, the button one, the button two and the button three are electrically connected with the processing unit.

Increase the difference between Password Input value and password actual value by numerical value button, increase the complexity of password, Improve the security performance of this PIN PAD.

Preferably, the output end includes effective output end and interference output end, and effective output end is to the processing Device exports useful signal, and the interference output end exports interference signal to the processing unit.

Setting by interfering output end increases the anti-of this PIN PAD and cracks performance, and interference cracks password, The complexity for increasing password improves the security performance of this PIN PAD.

Preferably, the processing unit includes receiving circuit, microprocessor and display screen；

The reception circuit includes the second common end and receiving end, and second common end is electrically connected with first common end It connects, the receiving end is electrically connected and corresponds with the output end；

The microprocessor is STC89C52, and the microprocessor is electrically connected the display screen.

STC89C52RC is a kind of low-power consumption of STC Corporation's production, 8 8-digit microcontroller of high-performance CMOS, has 8K byte System programmable flash storage.STC89C52 has done many improvement so that chip using classical MCS-51 kernel Have the function of that traditional 51 single-chip microcontroller of method does not have.On a single chip, possess dexterous 8 bit CPUs and in-system programmable components Flash, so that STC89C52 provides high flexible, super efficient solution for numerous embedded Control application systems.

Effectively, communication module is additionally provided on the turntable, the communication module passes through WiFi radio connection and end End is connected, and the communication module is electrically connected the enter key；The enter key at least there are two, and a Password Input only has One enter key is effective.

Under terminal control, it is random or specified for inputting input the position of effective enter key in cryptographic processes every time , the difficulty of password cracking is increased, the security performance of this PIN PAD is improved.

The utility model has the following beneficial effects:

Even if this PIN PAD makes other people or machine in visible Password Input by the setting of enter key and interference key Process, it is also difficult to obtain password, increase the safety of Password Input process；Setting by interfering output end increases close The anti-of code loader cracks performance, and interference cracks password, increases the complexity of password, improve this PIN PAD Security performance；The type of scale is more, arbitrarily can select or combine, and is determined according to actual use situation, meets different The hobby of user, extends use scope.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of disclosure embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only the certain embodiments of the disclosure, therefore should not be seen Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with Other relevant attached drawings are obtained according to these attached drawings.

Fig. 1 is the structural schematic diagram of this PIN PAD after truncated part protection cap.

Fig. 2 is the side structure schematic view of this PIN PAD after truncated part protection cap

Fig. 3 is input circuit and the connection schematic diagram for receiving circuit.

In figure: 1- input board；11- turntable；111- enter key；112- interferes key；12- dial；2- driving switch；3- turns Axis；4- output end；The first common end 5-；6- self-resetting switch；The receiving end 7-；The second common end 8-；9- processing unit；10- is protected Protecting cover.

Specific embodiment

With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.

As shown in Figure 1 to Figure 3, a kind of PIN PAD of the present embodiment, including input board 1 and processing unit 9；The place Reason device 9 is electrically connected the input board 1；The input board 1 includes turntable 11, and the side wall of the turntable 11 is equipped with enter key 111 interfere keys 112 with several.

This PIN PAD is in use, user touches the side wall of turntable 11 and then the position of confirmation input key 111, then According to before be arranged password sequence carry out password input, i.e., rotary turnplate 11 make enter key 111 turn to first it is close On the corresponding scale of code, make the first common end 5, the second common end 8, output end 4 corresponding with scale and with output end 4 relatively The receiving end 7 answered forms a complete circuit, but due to the presence of self-resetting switch 6, which is in off state, presses Lower self-resetting switch 6 makes circuit communication and exports a useful signal to microprocessor, after microprocessor receives useful signal On a display screen show a symbol to prompt this password to input, while self-resetting switch 6 after exporting useful signal from Closed state jumps back to off-state automatically, makes the circuit from communicating back to open circuit；It is remaining close to input to repeat above step Code.

This PIN PAD is since visually there is no significant differences with enter key 111 for interference key 112, in Password Input During, other people or machine can not know the input numerical value of password by vision, realize input password it is visible not It is found that increasing the safety of password.

Simultaneously as output end 4 include effective output end and interference two kinds of output end, now to both output ends 4 into Row is explained: the something in common of the two is: when enter key 111 turns on corresponding effective output end/interference output end, having A disconnection can be formed with the first common end 5, the second common end 8 and corresponding receiving end 7 by imitating output end/interference output end Circuit presses the closure of self-resetting switch 6 and then inputs a signal to microprocessor, and microprocessor receives after the signal to this Signal is handled, and self-resetting switch 6 jumps to off-state.

The two the difference is that: the signal that effective output end and interference output end are inputted is transmitted to microprocessor Afterwards, microprocessor judges the signal: the signal of effective output end input is useful signal, and microprocessor determines the position Inputting password is valid password, continues to input subsequent cryptographic and subsequent cryptographic is useful signal, then the group is close after Password Input Effectively, this PIN PAD enters to be operated code in next step；Interfere output end input is interference signal, and microprocessor determines the position Inputting password is invalid password, but the interference signal has no effect on the input of subsequent cryptographic, after the completion of this Password Input only Increase the digit of display input password.

In brief, performance is cracked by interfering the setting of output end to improve the anti-of this PIN PAD, i.e., by dry The digit that output end increases input password is disturbed, and the digit of practical password is less than the digit of input password, while interfering output end Processing and the effective input terminal of the signal of input do not influence the input of subsequent cryptographic, conceal bad password in this group of password Position further improves the anti-of this PIN PAD and cracks performance.

In the specific embodiment that the disclosure provides, the enter key 111 can be structured as any appropriate structure.Make For a kind of selection, the enter key 111 is equipped with heater.The surface roughness of the enter key 111 is greater than/is less than described dry Disturb key 112.The movable/fixed connection turntable 11 of enter key 111.

Visually there is no apparent distinguishing characteristics with interference key 112 for enter key 111, by determining enter key after touching 111 and enter key 111 initial position.By tactile discrimination enter key 111 and interference key 112 there are many achievable form, It is exemplified below wherein several feasible schemes:

First is that heater is arranged on enter key 111, specifically, the fever end of heater is arranged in enter key 111, add Remaining component part of hot device can be set in enter key 111 or in the other positions that this PIN PAD is arranged in, and add Enter key 111 is heated at the fever end of hot device, and the surface temperature of enter key 111 rises and then can be arrived by tactilely-perceptible The difference of enter key 111 and interference key 112, the position of final confirmation input key 111.

Second is that the surface roughness of enter key 111 and interference key 112 is different, the surface roughness of enter key 111 greater than/ Less than the surface roughness of interference key 112, when touching the enter key 111 and interference key 112 on turntable 11, surface roughness is not Together, coefficient of friction is different, and enter key 111 and interference key 112 are different in feel, the position of final confirmation input key 111.

Third is that the movable/fixed connection turntable 11 of the enter key 111, with enter key 111 is fixedly connected with turntable 11 Key 112 is interfered to be flexibly connected for turntable 11, enter key 111 is fixedly connected with turntable 11, and interference key 112 is flexibly connected turntable 11, When touch turntable 11 on enter key 111 and interference key 112 when, interfere 112 connection activity of key and enter key 111 is connected and fixed, The position of final confirmation input key 111；Specifically, enter key 111 is connected by lock device with turntable 11, lock device is to include Electromagnet, the electromagnetic coil being wrapped on electromagnet, the spring being connected with electromagnet and the locking plate being connected with spring, locking plate Enter key 111, the retracted position of electromagnetic coil on/off electric control spring are clamped, spring contraction makes locking board clamping, spring stretching, extension Locking plate is unclamped, and then realizes enter key 111 and the fixation of turntable 11/be flexibly connected, locking board clamping is defeated after spring contraction Entering key 111 is fixedly connected with enter key 111 from turntable 11 and interferes key 112 different with being flexibly connected for turntable 11, and then differentiates Enter key 111. out

When enter key 111 is flexibly connected turntable 1 and key 112 is interfered to be fixedly connected with turntable 1, lock device is shunk and interference key 112 are fixedly linked.

On the basis of remaining embodiment, as a kind of selection, the present embodiment can also increase dial 12, dial 12 It is so structured that any appropriate structure.As a kind of selection, the input board 1 further includes dial 12, the dial 12 It is arranged below the turntable 11, is equipped with several scales around the turntable 11 on the dial 12.

In the specific embodiment that the disclosure provides, the driving switch 2 can be structured as any appropriate structure.Make For a kind of selection, driving switch 2 is equipped with below the dial 12, the turntable 11 passes through the shaft for passing through the dial 12 3 are connected with the driving switch 2, and the shaft 3 is electrically connected with the driving switch 2；The driving switch 2 is equipped with output electricity Road, the output circuit include the first common end 5 and with the one-to-one output end 4 of the scale, first common end 5 is logical It crosses self-resetting switch 6 and is electrically connected the processing unit 9, the output end 4 is electrically connected the processing unit 9；The dial 12 Top is equipped with protection cap 10, and described 10 one end of protection cap and the dial 12 are hinged, and 10 other end of protection cap is equipped with and opens Mouthful.

Dial 12 is arranged below turntable 11, and through-hole has been opened up on dial 12, and turntable 11 passes through shaft 3 and scale Disk 12 is rotatablely connected, and the shape of turntable 11 is determined according to processing conditions, mounting condition etc., can be the shapes such as round, rectangular.It carves It spends and is looped around 11 surrounding of turntable, under average operating, scale is to be distributed in 11 surrounding of turntable according to certain rules, and scale itself can To be number, such as 1,2,3, it is also possible to Roman number, such as I, II, III, can also be capitalization English letter, such as A, B, C Deng further, scale is using character, pattern for forming password after the combination such as small English alphabet, pattern etc. in this patent Within protection scope.

Scale is arranged on dial 12 there are many form, can be and is uniformly arranged, be also possible to it is non-uniform, according to Depending on actually using situation, such as:

When being equipped with angular transducer in driving switch 2, driving switch 2 is electrically connected with angular transducer, dial 12 according to Scale quantity by scale be arranged on dial 12, by where one of scale position be arranged position initial position after, it is specified that Direction pivots clockwise or counter-clockwise position positive direction, the position of remaining scale can also show, the angle between adjacent scale Degree difference can be it is equal, be also possible to it is unequal, after the value for setting each scale, pass through angular transducer detect shaft 3 The angle of rotation, thus the value of confirmation input.

When driving switch 2 uses multi gear position rotary switch, multi gear position rotary switch is realized all by the rotation of shaft The disconnection and closure of the circuit of gear make a circuit pathways, interrupt or it are made to flow to other circuits, and scale and multi gear position are revolved The setting of gear is consistent on button switch, i.e., gear is uniformly arranged, and scale correspondence is uniformly arranged, and gear is not It is uniformly arranged, scale correspondence is unevenly arranged, selection consistent and corresponding multi gear position rotary switch with scale quantity Simplify the structure of this PIN PAD, economic cost reduces.

A blind hole has been opened up on driving switch 2, is plugged in the blind hole across the shaft 3 of through-hole and shaft 3 is blind at this It is rotated in hole.Output end consistent and one-to-one with scale quantity is provided with according to the quantity of scale on driving switch 2 4, output end 4 is electrically connected with corresponding receiving end 7, constitutes a part in circuit, and the another part in the circuit is driving switch 2 The first common end 5 and the second common end 8 for being electrically connected with the first common end 5, between the first common end 5 and the second common end 8 It is connected by self-resetting switch 6, before self-resetting switch 6 is not pressed, which is in off state.At 111 turns of enter key When moving to corresponding scale, self-resetting switch 6 is pressed, the closure of self-resetting switch 6 makes circuit communication, realizes the defeated of password Enter, the reset of self-resetting switch 6 later disconnects circuit.

Protection cap 10 is hinged on dial 12, user selection in Password Input close protection cap 10, i.e., side plate with Dial 12 contacts and then falls in the projection of protection cap 10 on turntable 11, blocks other people or machine close by protection cap 10 It snatches password in code input process；Alternatively, user opens protection cap when also can choose Password Input, i.e. side plate is detached from scale Disk 12 does not fall in the projection of protection cap 10 on turntable 11 in turn, and the blocking of protection cap 10 has been lacked during such Password Input, Input password faster, the time that input password needs is less, also protects password to a certain extent.

In the specific embodiment that the disclosure provides, the protection cap 10 can be structured as any appropriate structure.Make For a kind of selection, the dial 12 is equipped with order button and numerical value button；Described instruction button is arranged in the protection cap 10 open end, described instruction button include initial value button and value added button, the initial value button and the value added Button is electrically connected with the processing unit 9；The numerical value button be arranged in the protection cap 10 hinged end and the turntable Between 11, the numerical value button includes button one, button two and button three, the button one, the button two and the button Three are electrically connected with the processing unit 9.

There are three numerical value buttons, including button one, button two and button three, and each numerical value button can set a value, refer to It enables the input for being set as password of button provide two modes: pressing initial value button and then press wherein several numerical value and press Button and corresponding number are input to processing unit 9, and processing unit 9 is according to ∑ (value of numerical value button × press number) this value control Make the position of the enter key 111 of each Password Input, input value=password actual value of password；After pressing value added password, Input value=password actual value+∑ (value of numerical value button × of password presses number)；Increased by the setting of both of which The security performance of password.

When pressing value added button during Password Input and then press wherein several numerical value buttons and corresponding time Number is input to processing unit 9, and processing unit 9 determines input value=this password actual value+∑ (numerical value button of this password Value × press number).After the input value for thereby confirming that this password, rotation turntable inputs the value；When use value added function After the input value of password is more than the maximum value of scale afterwards, taking the mantissa of Password Input value is effective input value.

In the specific embodiment that the disclosure provides, the output end 4 can be structured as any appropriate structure.As A kind of selection, the output end 4 include effective output end and interference output end, and effective output end is to the processing unit 9 Useful signal is exported, the interference output end exports interference signal to the processing unit 9.

In order to increase the safety and the anti-cracking of password of this PIN PAD, output end 4 divides for effective output end and does Output end is disturbed, during Password Input, effective output end and interference output end are not had any different, and enter key 111 turns to pair On the output end 4 answered and after self-resetting switch 6 presses, no matter the output end 4 is effective output end or interference output end, this is defeated The value of scale corresponding to outlet 4 can be responded and show a symbol to prompt this password defeated on a display screen Enter；After the completion of Password Input, input password and preset password is compared in microprocessor, is exported when having to interfere in input password When holding the value of input, this inputs password and will abandon as useless code, only increases the digit of display input password.

The anti-of this PIN PAD is increased by the setting at exogenous disturbances end and cracks performance, and interference output end increases password While digit, the input of valid password is not interfered, even if input cryptographic processes are pried through, due to input password digit and reality Password digit is different, and password is made to be difficult to crack, and the interference signal of interference output end input has no effect on the input of subsequent cryptographic, into And be difficult to determine to input by mistake the sequence of password, increase the difficulty of password cracking.

In the specific embodiment that the disclosure provides, the processing unit 9 can be structured as any appropriate structure.Make For a kind of selection, the processing unit 9 includes receiving circuit, microprocessor and display screen；The reception circuit includes second public End 8 and receiving end 7, second common end 8 are electrically connected with first common end 5 altogether, the receiving end 7 and the output end 4 electrical connections and one-to-one correspondence；The microprocessor is STC89C52, and the microprocessor is electrically connected the display screen.

The signal that processing unit 9 inputs self-resetting switch 6 is handled, i.e. signal collection, comparison and display, receives electricity Road is electrically connected with driving switch 2 and receives the signal from driving switch 2, and then completes the collection of signal；Microprocessor docking The signal that circuit is collected is received to be compared with preset password with whether confirmation input password is correct；Display screen connects will receive circuit The signal of receipts shows notice symbol on a display screen one by one in sequence, such as " * " prompt cipher has inputted, meanwhile, display screen In the same plane with the arrangement of dial 12.

Microprocessor can be STC89C52, STC89C51, AT89, AT90 etc. and realize the processing handled input signal Device.

In the specific embodiment that the disclosure provides, the turntable 11 can be structured as any appropriate structure.As A kind of selection, communication module is additionally provided on the turntable 11, and the communication module passes through WiFi radio connection and terminal phase Even, and the communication module is electrically connected the enter key 111；The enter key 111 at least there are two, and Password Input is only There is an enter key 111 effective.

Turntable 11 is connected by communication module with terminal, terminal after this PIN PAD certain distance terminal and turn Disk 11 is connected, wherein the mode that terminal is connected with turntable 11 is not limited to WiFi connection type, further comprises bluetooth and wirelessly connects Connect, RFID be wirelessly connected etc. realizations be wirelessly connected communication mode.Turntable is randomly assigned by the control of terminal after terminal connection Any one enter key 111 is effective enter key 111 of this Password Input on 11, as being provided in each enter key 111 Heater, heater does not heat enter key 111 when not inputting password, after terminal specifies enter key 111, corresponding enter key 111 Interior heater is started to work, and passes through the position for touching confirmation input key 111 after heating corresponding enter key 111, defeated by this Enter key 111 and inputs password.By 111 position of enter key of each Password Input of terminal control, this PIN PAD is increased Security performance increases and cracks difficulty.

It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the disclosure to it is various can No further explanation will be given for the combination of energy.

The utility model is not limited to above-mentioned optional embodiment, anyone can obtain under the enlightenment of the utility model Other various forms of products, however, making any variation in its shape or structure, all the utility model rights that falls into are wanted The technical solution in confining spectrum is sought, is all fallen within the protection scope of the utility model.

Claims (10)

1. a kind of PIN PAD, it is characterised in that: including input board (1) and processing unit (9)；

The processing unit (9) is electrically connected the input board (1)；

The input board (1) includes turntable (11), and the side wall of the turntable (11) is equipped with enter key (111) and several interference Key (112).

2. PIN PAD according to claim 1, it is characterised in that: the enter key (111) is equipped with heater.

3. PIN PAD according to claim 1, it is characterised in that: the surface roughness of the enter key (111) is big In/it is less than the interference key (112).

4. PIN PAD according to claim 1, it is characterised in that: the movable/fixed connection institute of enter key (111) State turntable (11).

5. PIN PAD according to claim 1, it is characterised in that: the input board (1) further includes dial (12), Dial (12) setting is below the turntable (11), around the turntable (11) equipped with several on the dial (12) A scale.

6. PIN PAD according to claim 5, it is characterised in that: be equipped with driving switch below the dial (12) (2), the turntable (11) is connected by passing through the shaft (3) of the dial (12) with the driving switch (2), the shaft (3) it is electrically connected with the driving switch (2)；

The driving switch (2) be equipped with output circuit, the output circuit include the first common end (5) and with the scale one One corresponding output end (4), first common end (5) are electrically connected the processing unit (9), institute by self-resetting switch (6) It states output end (4) and is electrically connected the processing unit (9)；

Be equipped with protection cap (10) above the dial (12), described protection cap (10) one end and the dial (12) hingedly, Protection cap (10) other end is equipped with opening.

7. PIN PAD according to claim 6, it is characterised in that: the dial (12) be equipped with order button and Numerical value button；

Described instruction button is arranged in the open end of the protection cap (10), and described instruction button includes initial value button and increase It is worth button, the initial value button and the value added button are electrically connected with the processing unit (9)；

The numerical value button is arranged between the hinged end and the turntable (11) of the protection cap (10), the numerical value button packet Include button one, button two and button three, the button one, the button two and the button three with the processing unit (9) Electrical connection.

8. PIN PAD according to claim 6, it is characterised in that: the output end (4) include effective output end and Output end is interfered, effective output end exports useful signal to the processing unit (9), and the interference output end is to the place It manages device (9) and exports interference signal.

9. PIN PAD according to claim 6, it is characterised in that: the processing unit (9) includes receiving circuit, micro- Processor and display screen；

The reception circuit includes the second common end (8) and receiving end (7), second common end (8) and described first public (5) electrical connection is held, the receiving end (7) is electrically connected and corresponds with the output end (4)；

The microprocessor is STC89C52, and the microprocessor is electrically connected the display screen.

10. PIN PAD according to claim 1, it is characterised in that: it is additionally provided with communication module on the turntable (11), The communication module is connected by WiFi radio connection with terminal, and the communication module is electrically connected the enter key (111)；The enter key (111) at least there are two, and Password Input only one enter key (111) is effective.