CN-224217035-U - Integrated peripheral extension interface access device

Abstract

The utility model discloses an integrated peripheral extension interface access device which comprises an access module, a main control module, a switching module and an extension interface, wherein the access end of the switching module is connected with the extension interface, the extension interface is used for being connected with a peripheral, the control output end of the main control module is connected with the control input end of the switching module, the output end of the switching module is controlled to be connected with the input end of the main control module or the input end of the access module in a gating mode according to a verification result of the peripheral, the output end of the switching module is connected with the input end of the main control module by default, and the output end of the access module is used for being connected with an upper computer. The method comprises the steps that the output end of a switching module is connected with the input end of an access module only after the peripheral passes verification of a main control module, so that the peripheral is connected with an upper computer, and the peripheral is connected with the main control module to realize physical isolation between the peripheral and the upper computer when the peripheral does not pass verification.

Inventors

• ZHU MINGXIA
• ZHENG SHIDONG
• ZHENG HONG
• YU TAO
• ZHANG ZIYIN

Assignees

• 福建升腾资讯有限公司

Dates

Publication Date

20260508

Application Date

20250418

Claims (10)

1. 1. An integrated peripheral extension interface access device is characterized by comprising an access module, a main control module, a switching module and an extension interface; The access end of the switching module is connected with the expansion interface; The expansion interface is used for being connected with a peripheral; The control output end of the main control module is connected with the control input end of the switching module, and the output end of the switching module is controlled to be connected with the input end of the main control module or the input end of the access module in a gating manner according to the verification result of the peripheral; The output end of the switching module is connected with the input end of the main control module by default; The output end of the access module is used for being connected with an upper computer.
2. 2. The integrated peripheral expansion interface access device of claim 1, wherein said access module comprises an access control chip; The access control chip comprises a host pin, a main control pin and a peripheral pin; the switching module comprises a first sub-output end; the host pin is used for being connected with an upper computer; the main control pin is connected with the interactive input end of the main control module; the peripheral pins are connected with the first sub-output end of the switching module in a gating mode.
3. 3. An integrated peripheral expansion interface access device according to claim 2, wherein said access module further comprises a coupling unit; One end of the coupling unit is grounded, and the other end of the coupling unit is connected with a power supply pin of the access control chip.
4. 4. An integrated peripheral expansion interface access device according to claim 3, wherein said coupling unit comprises at least one capacitor; One end of the capacitor is connected with a power supply pin of the access control chip, and the other end of the capacitor is grounded.
5. 5. An integrated peripheral expansion interface access device according to claim 3, wherein said coupling unit further comprises at least one inductor; The access control chip comprises at least two power supply pins of different types; and two ends of the inductor are respectively connected with one type of power supply pin.
6. 6. The integrated peripheral expansion interface access device of claim 1, wherein said master control module comprises a master control chip; the main control chip comprises peripheral pins, control pins and interaction pins; the switching module comprises a second sub-output end; the peripheral pins are connected with the second sub-output end of the switching module in a gating manner; The control pin is connected with the control input end of the switching module; the interaction pin is connected with the interaction input end of the access module.
7. 7. The integrated peripheral expansion interface access device of claim 1, wherein said switching module comprises a switching chip; The switching chip comprises a control input pin, a first sub-output pin, a second sub-output pin and an input pin; the input pin is connected with the expansion interface; the control input pin is connected with the control output end of the main control module, and controls the first sub-output pin to be connected with the input end of the access module, or the second sub-output pin to be connected with the input end of the main control module.
8. 8. The integrated peripheral expansion interface access device of claim 1, wherein said expansion interface comprises an interface terminal and an expansion circuit; the input end of the interface terminal is used for being connected with the peripheral equipment; the output end of the interface terminal is connected with the input end of the expansion circuit; the output end of the expansion circuit is connected with the access end of the switching module.
9. 9. The integrated peripheral expansion interface access device of claim 8, wherein said expansion circuit comprises a fuse resistor; the safety resistor is connected with the output end of the interface terminal.
10. 10. The integrated peripheral expansion interface access device of claim 8, wherein said expansion circuit comprises a common mode inductance; The input end of the common mode inductor is connected with the output end of the interface terminal; And the output end of the common mode inductor is connected with the access end of the switching module.

Description

Integrated peripheral extension interface access device Technical Field The utility model relates to the technical field of equipment access control, in particular to an integrated peripheral extension interface access device. Background Integrated peripheral devices are used in the financial, insurance industries, etc. In order to ensure the safety of the access equipment, the upper computer controls the accessed USB equipment through the need, so that the unauthorized access of the USB equipment is prevented, and the data safety of the upper computer is improved. For example, the existing mode is to connect a USB device such as a USB shield and a USB disk to an integrated peripheral USB extension port. The integrated peripheral extension USB interface is directly connected with the upper computer, USB is controlled through an upper computer program or an upper interface, and some USB devices are disabled or allowed to be accessed on a software level. However, as the number and variety of access devices increases, the difficulty of developing an upper computer program or an upper layer interface increases. And, unauthorized USB device access cannot be physically isolated. Disclosure of utility model The utility model aims to solve the technical problem of providing an integrated peripheral extension interface access device so as to physically isolate unauthorized equipment access. In order to solve the technical problems, the utility model adopts the following technical scheme: The integrated peripheral extension interface access device comprises an access module, a main control module, a switching module and an extension interface, wherein the access end of the switching module is connected with the extension interface, the extension interface is used for being connected with a peripheral, the control output end of the main control module is connected with the control input end of the switching module, the output end of the switching module is controlled to be connected with the input end of the main control module or the input end of the access module in a gating manner according to a verification result of the peripheral, the output end of the switching module is connected with the input end of the main control module by default, and the output end of the access module is used for being connected with an upper computer. The access module comprises an access control chip, the access control chip comprises a host pin, a main control pin and a peripheral pin, the switching module comprises a first sub-output end, the host pin is used for being connected with an upper computer, the main control pin is connected with an interaction input end of the main control module, and the peripheral pin is connected with the first sub-output end of the switching module in a gating mode. Further, the access module further comprises a coupling unit, one end of the coupling unit is grounded, and the other end of the coupling unit is connected with a power supply pin of the access control chip. Further, the coupling unit comprises at least one capacitor, one end of the capacitor is connected with a power supply pin of the access control chip, and the other end of the capacitor is grounded. Further, the coupling unit further comprises at least one inductor, the access control chip comprises at least two power supply pins of different types, and two ends of the inductor are respectively connected with one type of power supply pin. The main control module comprises a main control chip, wherein the main control chip comprises a peripheral pin, a control pin and an interaction pin, the switching module comprises a second sub-output end, the peripheral pin is in gating connection with the second sub-output end of the switching module, the control pin is connected with the control input end of the switching module, and the interaction pin is connected with the interaction input end of the access module. The switching module further comprises a switching chip, wherein the switching chip comprises a control input pin, a first sub-output pin, a second sub-output pin and an input pin, the input pin is connected with the expansion interface, the control input pin is connected with the control output end of the main control module and controls the first sub-output pin to be connected with the input end of the access module, or the second sub-output pin is connected with the input end of the main control module. The expansion interface comprises an interface and an expansion circuit, wherein the input end of the interface terminal is used for being connected with a peripheral, the output end of the interface terminal is connected with the input end of the expansion circuit, and the output end of the expansion circuit is connected with the access end of the switching module. Further, the expanding circuit comprises a safety resistor, and the safety resistor is connected with the output end of the interface terminal. Further, the expansion