Universal serial bus (USB) full-automatic password input device
By designing interface circuits and programmable preset control storage circuits, the problem of password input devices being easily spied on was solved, achieving secure and convenient password input and enhancing the anti-spying capabilities of the password input device.
Patent Information
- Application Number
- CN202520010646.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing password input devices are easily spied on by others during operation, resulting in insufficient password security, and the protective cover design is uncomfortable.
It employs an interface circuit, a computer USB keyboard protocol encoding circuit, and a programmable preset control storage circuit. Through logic control and filtering, it makes the password invisible and prevents others from recognizing the keystrokes. Combined with a status display module, it enhances security.
It improves the security and ease of use of password input, prevents the risk of unauthorized password theft, and expands application scenarios.
Smart Images
Figure CN223598234U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to electronic input equipment technical field, especially, relate to a USB full -automatic password input device. BACKGROUND
[0002] At present, the application field of password input device is more and more common, for example, bank account deposit and withdrawal, credit card consumption, access control system etc., has brought great convenience to people's life.However, the password input device used by bank system or access control system mostly uses ordinary input keyboard, when operator uses it to input password, its operation process is very easy to be spied by the person beside or optical spying system intentionally placed, therefore, the security of password cannot be effectively guaranteed, and even easy to forget the set password.Although, some password input devices increase the protective cover, but because the number sequence on the keyboard is fixed and unchangeable, the person beside can easily determine the password from the finger method of operator, and also cannot actually play the function of preventing spying, and the protective cover shields the vision of operator, and it is not very comfortable to use.In order to solve the above problems, provide a kind of USB full -automatic password input device of convenient operation, high security. SUMMARY
[0003] In view of the above problems, the utility model provides a kind of USB full -automatic password input device, can improve the input password efficiency, password is invisible, effectively prevent the risk of password theft by identifying the track of operator's keying or snooping of the person beside.
[0004] In order to realize the above purpose, the utility model adopts the following technical scheme:
[0005] The utility model provides a kind of USB full -automatic password input device, including interface circuit, computer USB keyboard protocol coding circuit and programming preset control storage circuit, the interface circuit, the programming preset control storage circuit all are connected with the computer USB keyboard protocol coding circuit, the computer USB keyboard protocol coding circuit includes first control module, first peripheral circuit, second peripheral circuit and state display module, the first peripheral circuit, the second peripheral circuit, the state display module all are connected with the first control module, and the first peripheral circuit is connected with the state display module;
[0006] The programming preset control storage circuit includes the second control module and the first filter module connected with the state display module, the first filter module is connected with the interface circuit, and the first filter module is connected with the second control module;
[0007] The interface circuit is used for receiving an input power supply, the second control module performs logical control on the first control module according to a keyboard protocol, and the working state of the first control module is output on the state display module, wherein the logical control includes HID control, encoding control and user preset keyboard password control.
[0008] As a preferred embodiment of the above technical solution, the interface circuit comprises a first interface end, a second interface end and a USB signal output end, the first interface end and the second interface end are connected with the USB signal output end, the first interface end is connected with the second interface end, the first interface end comprises a P1 terminal and a second filter module connected with the P1 terminal, the second interface end comprises a P2 terminal and an enable module connected with the P2 terminal, the P1 terminal and the P2 terminal are used for inputting USB signals, the second filter module is used for filtering the power supply corresponding to the USB signals and passing through the USB signal output end, and the enable module is used for enabling in cooperation with an OTG USB protocol.
[0009] As a preferred embodiment of the above technical solution, the second filter module comprises a capacitor C1 and a capacitor C2 connected in parallel with the P1 terminal, and the enable module comprises a resistor R3.
[0010] As a preferred embodiment of the above technical solution, the first peripheral circuit comprises a plurality of parallel resistors and a plurality of capacitors, the second peripheral circuit comprises a P3 terminal and a resistor R16 connected with the P3 terminal, and the second peripheral circuit is used for providing a working clock for the first control module.
[0011] As a preferred embodiment of the above technical solution, the first control module comprises a chip IC1 with a model of WCH-CH9328-SOP16, and the state display module comprises a diode D3 connected with the chip IC1 and a resistor R7 connected with the diode D3.
[0012] As a preferred embodiment of the above technical solution, the plurality of parallel resistors comprise R8, R9, R10, R11, R12, R13, the plurality of capacitors comprise a capacitor C5, a capacitor C9 and a capacitor C10 connected with the chip IC1, and the capacitor C5 is connected in series with the capacitor C9.
[0013] As a preferred embodiment of the above technical solution, the second control module comprises a chip U3 with a model of STC8G1K08A-36I-SOP8, and the chip U3 comprises an operator, a controller, a RAM, a ROM and an SCLK.
[0014] As a preferred embodiment of the above technical solution, the programming preset control storage circuit further comprises a P6 terminal connected with the chip U3, and the P6 terminal is a factory interface of the chip U3.
[0015] As the preferred technical solution, the first filter module comprises a capacitor C11 receiving USB power supply.
[0016] Compared with the prior art, the USB full-automatic password input device has the following beneficial effects:
[0017] By setting the interface circuit, the computer USB keyboard protocol encoding circuit and the programming preset control storage circuit, the interface circuit is used for receiving input power supply, the second control module performs logical control on the first control module according to the keyboard protocol, and the working state of the first control module is output on the state display module, the computer USB keyboard protocol encoding circuit sets two peripheral circuits, which can provide stable working clock and normal logical operation for the chip IC1, the first filter module filters the circuit to prevent interference, improves the working reliability of the USB full-automatic password input device, the programming preset control storage circuit can provide various logical controls, thereby widening the application scenarios of the USB full-automatic password input device, the computer USB keyboard protocol encoding circuit and the programming preset control storage circuit adaptively provide accurate communication, and effectively prevent the risk of stealing passwords by identifying the track of the operator's key pressing or snooping. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The USB full-automatic password input device provided by the present application has the structure diagram as shown in the figure;
[0019] Figure 2 The circuit diagram of the interface circuit provided by the present application has the circuit diagram as shown in the figure;
[0020] Figure 3 The circuit diagram of the computer USB keyboard protocol encoding circuit provided by the present application has the circuit diagram as shown in the figure;
[0021] Figure 4 The circuit diagram of the programming preset control storage circuit provided by the present application has the circuit diagram as shown in the figure.
[0022] The main element symbols are explained as follows:
[0023] 10-interface circuit; 11-first interface end; 12-second interface end; 13-USB signal output end; 20-computer USB keyboard protocol encoding circuit; 21-first control module; 22-first peripheral circuit; 23-second peripheral circuit; 24-state display module; 30-programming preset control storage circuit; 31-second control module; 32-first filter module. DETAILED DESCRIPTION
[0024] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments.
[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "straight", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0026] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application provides a kind of USB full-automatic password inputter, including interface circuit 10, computer USB keyboard protocol encoding circuit 20 and programming preset control storage circuit 30, the interface circuit 10, the programming preset control storage circuit 30 all are connected with the computer USB keyboard protocol encoding circuit 20, the computer USB keyboard protocol encoding circuit 20 includes first control module 21, first peripheral circuit 22, second peripheral circuit 23 and state display module 24, the first peripheral circuit 22, the second peripheral circuit 23, the state display module 24 all are connected with the first control module 21, the first peripheral circuit 22 is connected with the state display module 24;
[0027] The programming preset control storage circuit 30 includes the second control module 31 and the first filter module 32 connected with the state display module 24, the first filter module 32 is connected with the interface circuit 10, the first filter module 32 is connected with the second control module 31;
[0028] The interface circuit 10 is used for receiving input power supply, the second control module 31 carries out logic control to the first control module 21 according to keyboard protocol, and the working state of the first control module 21 is output in the state display module 24, wherein, the logic control includes HID control, encoding control and user preset keyboard password control.
[0029] The interface circuit 10 comprises a first interface end 11, a second interface end 12 and a USB signal output end 13. The first interface end 11 and the second interface end 12 are connected with the USB signal output end 13. The first interface end 11 is connected with the second interface end 12. The first interface end 11 comprises a P1 terminal and a second filter module connected with the P1 terminal. The second interface end 12 comprises a P2 terminal and an enabling module connected with the P2 terminal. The P1 terminal and the P2 terminal are used for inputting USB signals. The second filter module is used for filtering the power corresponding to the USB signals and passing through the USB signal output end 13. The enabling module is used for enabling in cooperation with the OTG USB protocol. The second filter module comprises a capacitor C1 and a capacitor C2 connected in parallel with the P1 terminal. The enabling module comprises a resistor R3. The first peripheral circuit 22 comprises a plurality of parallel resistors and a plurality of capacitors. The second peripheral circuit 23 comprises a P3 terminal and a resistor R16 connected with the P3 terminal. The second peripheral circuit 23 is used for providing a working clock for the first control module 21.
[0030] It should be noted that the first control module 21 comprises a chip IC1 with a model of WCH-CH9328-SOP16. The state display module 24 comprises a diode D3 connected with the chip IC1 and a resistor R7 connected with the diode D3. The plurality of parallel resistors comprises R8, R9, R10, R11, R12, R13. The plurality of capacitors comprises a capacitor C5, a capacitor C9 and a capacitor C10 connected with the chip IC1. The capacitor C5 is connected in series with the capacitor C9. The second control module 31 comprises a chip U3 with a model of STC8G1K08A-36I-SOP8. The chip U3 comprises an operator, a controller, a RAM, a ROM and an SCLK. The programming preset control storage circuit 30 further comprises a P6 terminal connected with the chip U3. The P6 terminal is a factory interface of the chip U3. The first filter module 32 comprises a capacitor C11 receiving USB power supply.
[0031] Specifically, referring to Figure 2The interface circuit 10 mainly comprises a first interface end 11, a second interface end 12 and a USB signal output end 13. The first interface end 11 comprises a P1 terminal and a second filter module. The second interface end 12 comprises a P2 terminal and a resistor R3. The second filter module comprises parallel capacitors C1 and C3. The P1 terminal comprises six pins. The pins 1, 5 and 6 of the P1 terminal are grounded. The pin 4 of the P1 terminal is connected with the parallel capacitors. The pins 2 and 3 of the P1 terminal are connected with the USB signal output end 13 and the pins 2 and 3 of the P2 terminal. The P2 terminal comprises seven pins. The pin 1 of the P2 terminal is connected with VCC. The pin 4 of the P2 terminal is connected with one end of the resistor R3. The pins 5, 6 and 7 of the P2 terminal are connected with the other end of the resistor R3 and the ground. The USB signal output end 13 comprises resistors R1 and R2 and corresponds to USB_D- and USB_D+ respectively. The P1 terminal and the P2 terminal can be USB ports. When the P2 is connected with the USB port, the R3 cooperates with the OTG USB protocol to enable, and then the USB signal of the P1 or the P2 is output from the compatible resistors R1 and R2, and the power output of the USB is filtered by the C1 and C3 to prevent interference.
[0032] Specifically, referring to Figure 3 The computer USB keyboard protocol encoding circuit mainly comprises a chip IC1, capacitors C5, C9 and C10, resistors R7, R8, R9, R10, R11, R13, R16, a diode D3 and a P3 terminal. The pins 6 and 7 of the chip IC1 receive the USB signals output by the resistors R1 and R2 in the interface circuit and perform keyboard protocol encoding. The P1 terminal or the P2 terminal of the interface circuit is connected with a corresponding device. The resistors R8, R9, R10, R11 and R13 form a first peripheral circuit 22. The resistor R16 and the P3 terminal form a second peripheral circuit 23. The pin 16 of the chip IC1 outputs an HID_ACK signal. The anode of the diode D3 is connected with the resistor R7. The cathode of the diode D3 is connected with the pin 16 of the chip IC1. The diode D3 and the resistor R7 form a state display module 24. In other words, the P3 terminal is a working clock peripheral circuit of the chip IC1, which is compatible and matched by the resistor R16. C10, R12, C9, C5, R8, R9, R10, R11 and R13 are peripheral circuits of a logic operator of the chip IC1, so that the chip can work normally. The R7 and D3 respond to the working state of the chip and are connected to a programming preset control storage circuit 30, so that the programming preset control storage circuit 30 can be accurately closed-loop and the communication data connected with R12 is adjusted by the programming preset control storage circuit 30.
[0033] Specifically, referring to Figure 4The programming preset control storage circuit 30 mainly comprises a chip U3, a capacitor C11 and a P6 terminal, the pin 2 of the chip U3 is connected with the capacitor C11, the pin 6 of the chip U3 is connected with a resistor R12, the pin 8 of the chip U3 is connected with the pin 16 of the chip IC1, and the P6 terminal is connected with the pins 5 and 6 of the chip U3. The USB power supply of the interface circuit is anti-interference by the C11, so as to ensure the stable work of the chip U3. The chip U3 comprises an operator, a controller, a RAM, a ROM and a SCLK. The chip U3 controls the chip IC1 according to the keyboard protocol, automatically calculates the encoding control and the user preset keyboard password control, and checks the response of the IC1 chip, so as to realize the accurate control. The P6 terminal is a factory interface of the chip U3. The P6 terminal can provide a program driving or a firmware upgrade interface.
[0034] It should be understood that the utility model provides a kind of USB full-automatic password inputter, by setting interface circuit 10, computer USB keyboard protocol encoding circuit 20 and programming preset control storage circuit 30, interface circuit 10 is used to receive input power supply, second control module 31 is according to keyboard protocol to first control module 21 is carried out logic control, and the working state of first control module 21 is output in state display module 24, computer USB keyboard protocol encoding circuit 20 sets two peripheral circuits, can provide stable working clock and normal logic operation for chip IC1, first filter module 32 carries out filter anti-interference to circuit, improve the working reliability of USB full-automatic password inputter, programming preset control storage circuit 30 can provide multiple logic controls, so as to broaden the application scenarios of USB full-automatic password inputter, computer USB keyboard protocol encoding circuit 20 and programming preset control storage circuit 30 adapt to provide accurate communication, convenient operation and simple circuit structure, effectively prevent the risk of stealing password by identifying the track of operator's key pressing or snooping of others.
[0035] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A USB full automatic password inputter, characterized in that, Interface circuit, computer USB keyboard protocol coding circuit and programming preset control storage circuit, the interface circuit, the programming preset control storage circuit are connected with the computer USB keyboard protocol coding circuit, the computer USB keyboard protocol coding circuit includes first control module, first peripheral circuit, second peripheral circuit and state display module, the first peripheral circuit, the second peripheral circuit, the state display module are connected with the first control module, the first peripheral circuit is connected with the state display module; The programming preset control storage circuit includes the second control module and the first filter module connected with the state display module, the first filter module is connected with the interface circuit, and the first filter module is connected with the second control module. The interface circuit is used for receiving input power, the second control module controls the first control module according to keyboard protocol, and the working state of the first control module is output on the state display module, wherein the logic control includes HID control, coding control and user preset keyboard password control.
2. The USB full-automatic password input device according to claim 1, characterized in that, The interface circuit includes first interface end, second interface end and USB signal output end, the first interface end, the second interface end are connected with the USB signal output end, the first interface end is connected with the second interface end, the first interface end includes P1 terminal, the second filter module connected with the P1 terminal, the second interface end includes P2 terminal, the enable module connected with the P2 terminal, the P1 terminal and the P2 terminal are used for inputting USB signal, the second filter module is used for filtering the power corresponding to the USB signal and passing through the USB signal output end, and the enable module is used for cooperating with OTG USB protocol enablement.
3. The USB full automatic password input device according to claim 2, wherein, The second filter module includes capacitor C1 and capacitor C2 connected in parallel with the P1 terminal, and the enable module includes resistor R3.
4. The USB full automatic password input device according to claim 1, wherein, The first peripheral circuit includes a plurality of parallel resistors and a plurality of capacitors, and the second peripheral circuit includes P3 terminal, resistor R16 connected with the P3 terminal, and the second peripheral circuit is used for providing working clock for the first control module.
5. The USB full automatic password input device according to claim 4, wherein, The first control module includes chip IC1 with model WCH-CH9328-SOP16, and the state display module includes diode D3 connected with the chip IC1, and resistor R7 connected with the diode D3.
6. The USB full automatic password input device according to claim 5, wherein, The plurality of parallel resistors includes R8, R9, R10, R11, R12, R13, and the plurality of capacitors includes capacitor C5, capacitor C9 and capacitor C10 connected with the chip IC1, and the capacitor C5 is connected with the capacitor C9 in series.
7. The USB full automatic password input device according to claim 1, wherein, The second control module includes chip U3 with model STC8G1K08A-36I-SOP8, and the chip U3 includes operator, controller, RAM, ROM and SCLK.
8. The USB full automatic password input device according to claim 7, wherein, The programming preset control storage circuit further includes P6 terminal connected with the chip U3, and the P6 terminal is a factory interface of the chip U3.
9. The USB full automatic password input device according to claim 1, wherein, The first filter module includes a capacitor C11 receiving USB power supply.