Multifunctional USB hub

Abstract

The utility model relates to a concentrator, in particular to a multifunctional universal serial bus (USB) concentrator, which comprises a shell and a circuit board, the shell is of a hollow cavity structure and consists of an upper shell and a lower shell, and the circuit board is fixedly mounted in the cavity and fixedly connected with a fixed convex column in the lower shell. The circuit board comprises a circuit board body, a USB HUB power supply connector, a voltage protection circuit, a selection input IO connector, a selection output circuit, a first USB female connector, a second USB female connector, a third USB female connector, a fourth USB female connector and a fifth USB female connector, and the USB HUB power supply connector, the voltage protection circuit, the selection input IO connector, the selection output circuit, the first USB female connector, the second USB female connector, the third USB female connector, the fourth USB female connector and the fifth USB female connector are arranged on the circuit board body. The output end is connected with the circuit board body. The device is simple in structure and reasonable in design, and can integrate flow functions such as reinstallation, testing and encryption into automatic production, so that the accuracy and the stability of operation are improved, manual operation is replaced, the workload of staff is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a hub, in particular to a multifunctional USB hub. Background Technique

[0002] The USB hub is also called USB HUB, which is a specific part of the USB structure. The ports it provides connect devices to the USB bus, detect the devices connected to the bus at the same time, provide power management for these devices, and are responsible for bus fault detection and recovery. When the USB hub is used in flashing, testing, programming, and encryption devices, since each socket has the same function, binary combinations are needed to drive different USB hub sockets to test different functions of the same product respectively, and it is compatible with different types of automated production tests, which has a certain improvement on the automated process control.

[0003] At present, the USB hubs used in automated production tests on the market all have the following problems to varying degrees: 1. Network security: Since the USB hub is a shared device, all devices connected to the USB hub are on the same network, so the communication between them is not encrypted and sometimes faces security vulnerability problems; 2. Connection speed: The USB hub device has a slow loading and conversion speed, affecting work efficiency; 3. Connection stability: Disconnection may occur during connection, and repeated plugging and unplugging may result in failure to recognize; 4. OTG protocol: The goal of OTG is to achieve flexible switching between the USB hub, the host, and the device, but the cost of this process is an increase in the complexity of the driver. In view of the above problems, the utility model designs a multifunctional USB hub. Content of the Utility Model

[0004] The purpose of the utility model is to provide a multifunctional USB hub, which has the advantages of simple structure, reasonable design, can integrate functions such as flashing, testing, and encryption into automated production, improve the accuracy and stability of operations, thus replacing manual operations, reducing the workload of employees, and improving work efficiency, and solves the problems raised in the above technical background.

[0005] To achieve the above object, the present utility model provides the following technical solution: a multi-functional USB hub, which includes a housing and a circuit board. The housing is a cavity structure with a hollow interior, and the housing is composed of an upper shell and a lower shell. The upper shell is snapped onto the lower shell and can open or close the lower shell. The circuit board is fixedly installed in the cavity and fixedly connected to the fixing studs inside the lower shell. The circuit board includes a circuit board main body and a USB HUB power supply connector, a voltage protection circuit, a selection input IO connector, a selection output circuit, a first USB female head interface, a second USB female head interface, a third USB female head interface, a fourth USB female head interface, and a fifth USB female head interface arranged on the circuit board main body. Among them, the USB HUB power supply connector, the selection input IO connector, the first USB female head interface, the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface all penetrate through the lower shell from the inside to the outside and extend to the outside of the lower shell. The input end of the voltage protection circuit is connected to the USB HUB power supply connector, and the output end is connected to the circuit board main body. The voltage protection circuit steps down the voltage provided by the USB HUB power supply connector and then supplies power to the circuit board main body. The input end of the selection output circuit is connected to the selection input IO connector, and the output end is respectively connected to the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface.

[0006] Preferably, through holes for the USB HUB power supply connector, the selection input IO connector, the first USB female head interface, the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface to pass through are provided on the lower shell.

[0007] Preferably, a plurality of fixing studs are provided. The plurality of fixing studs are connected end to end in a "convex" shape, and each fixing stud is integrally injection-molded with the lower shell.

[0008] Preferably, positioning holes adapted to the fixing studs are provided on the circuit board. The circuit board further includes an analog switch. The analog switch is electrically connected to the circuit board main body. The analog switch is composed of a first analog switch, a second analog switch, and a third analog switch. The first analog switch, the second analog switch, and the third analog switch are respectively connected to the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface. Among them, the first analog switch is used to control the on and off of the power supply of the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface. The second analog switch and the third analog switch respectively control the data reception and data transmission of the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface.

[0009] Preferably, the first analog switch, the second analog switch, and the third analog switch have the same model, which is RS2252XTSS16.

[0010] Preferably, the voltage input by the USB HUB power supply connector is a DC 5V voltage.

[0011] Preferably, the voltage protection circuit is composed of a power plug-in terminal P1, a diode D1, and a resistor R1. The 2nd pin of the power plug-in terminal P1 is grounded, the 1st pin is connected to the diode D1, one end of the resistor R1 is connected to the diode D1 away from one end of the power plug-in terminal P1, and the other end is connected to the main board body.

[0012] Preferably, the first USB female head interface is located on one side of the USB HUB power supply connector, and the first USB female head interface is the main control communication port, which is used to connect to the main control PC.

[0013] Preferably, the selection output circuit is composed of a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a triode Q1, a triode Q2, an LED1, and an LED2. One end of the resistor R4 is connected to the IN1 port of the selection input IO connector, and the other end is respectively connected to the resistor R2 and the base of the triode Q1. The emitter of the triode Q1 and the resistor R2 away from one end of the IN1 port are both connected to the power supply terminal. The collector of the triode Q1 is connected to the ground wire after passing through the resistor R6. One end of the resistor R5 is connected to the IN2 port of the selection input IO connector, and the other end is respectively connected to the resistor R3 and the base of the triode Q2. The emitter of the triode Q2 and the resistor R3 away from one end of the IN2 port are both connected to the power supply terminal. The collector of the triode Q1 is grounded after passing through the resistor R7. The triode Q1 and the triode Q2 are both PNP triodes, and their models are both SS8550.

[0014] Preferably, the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface are arranged side by side on the main board body.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model provides a multi-functional USB hub. The USB hub includes a housing and a circuit board. The circuit board is arranged inside the housing, and the overall structure is simple and reasonably designed. The circuit board includes a circuit board main body, a USB HUB power supply connector, a voltage protection circuit, a selection input IO connector, a selection output circuit, a first USB female head interface, a second USB female head interface, a third USB female head interface, a fourth USB female head interface, and a fifth USB female head interface arranged on the circuit board main body. By setting the selection input IO connector, the selection input IO connector uses binary combination to switch the use of the second USB female head interface, the third USB female head interface, the fourth USB female head interface, and the fifth USB female head interface. Under the combination and cooperation of the triode and various resistors in the selection output circuit, it realizes the free switching of the use of the HUB port and a high-speed and stable transmission speed, achieving the progress of a USB communication reform in automated production. At the same time, it improves the problems such as the failure of flashing, programming, testing, encryption, etc. caused by human error in inserting the wrong USB port when not involved in automated production. It effectively improves the production efficiency, with a stable USB HUB port and a high-speed transmission ability, making it stand out in automated production. By integrating the functions of processes such as flashing, testing, and encryption into automated production through the USB hub in the present utility model, the accuracy and stability of operations are improved, thereby replacing manual operations and reducing the workload of employees, which is worthy of being vigorously promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structure diagram of the present utility model;

[0018] Figure 2 is the exploded view of the present utility model;

[0019] Figure 3 is the structure diagram of the circuit board of the present utility model;

[0020] Figure 4 is the principle block diagram of the circuit board of the present utility model;

[0021] Figure 5 is the circuit schematic diagram of the voltage protection circuit of the present utility model;

[0022] Figure 6 is the circuit schematic diagram of the selection input IO connector of the present utility model;

[0023] Figure 7 is the circuit schematic diagram of the selection output circuit of the present utility model.

[0024] The reference numerals and names in the figures are as follows:

[0025] 1. Housing; 11. Upper housing; 12. Lower housing; 13. Fixed convex column; 2. Circuit board; 21. Circuit board body; 22. USB HUB power supply connector; 23. Voltage protection circuit; 24. Selective input IO connector; 25. Selective output circuit; 26. First USB female head interface; 27. Second USB female head interface; 28. Third USB female head interface; 29. Fourth USB female head interface; 210. Fifth USB female head interface; 211. Analog switch; 2111. First analog switch; 2112. Second analog switch; 2113. Third analog switch; 212. Positioning hole; 3. Through hole. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0028] In the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0029] Please refer toFigure 1 and Figure 2 An embodiment provided by the present utility model: a multi-functional USB hub. The USB hub includes a housing 1 and a circuit board 2. The housing 1 is a cavity structure with a hollow interior, and the housing 1 is composed of an upper shell 11 and a lower shell 12. The upper shell 11 is buckled on the lower shell 12, and the lower shell 12 can be opened or closed. The circuit board 2 is fixedly installed in the cavity and fixedly connected to the fixing studs 13 in the lower shell 12. A plurality of the fixing studs 13 are provided, and the plurality of fixing studs 13 are connected end to end to form a "convex" shape. Each of the fixing studs 13 is integrally injection-molded with the lower shell 12.

[0030] Please refer to again Figure 1 and Figure 2 By adopting the above technical solution, the overall structure of the obtained USB hub is simple and reasonable in design. The circuit board 2 is fixed by the fixing studs 13, and the fixing studs 13 are connected end to end to form a "convex" shape, so that the circuit board 2 is fixed more stably and has strong practicability.

[0031] Please refer to Figure 3 and Figure 4, a positioning hole 212 adapted to the fixing stud 13 is formed in the circuit board 2 in the figure, and the circuit board 2 includes a circuit board main body 21 and a USB HUB power supply connector 22, a voltage protection circuit 23, a selection input IO connector 24, a selection output circuit 25, a first USB female head interface 26, a second USB female head interface 27, a third USB female head interface 28, a fourth USB female head interface 29, and a fifth USB female head interface 210 arranged on the circuit board main body 21. Among them, the USB HUB power supply connector 22, the selection input IO connector 24, the first USB female head interface 26, the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210 all penetrate the lower case 12 from the inside to the outside and extend to the outside of the lower case 12. The voltage input by the USB HUB power supply connector 22 is a DC 5V voltage. The first USB female head interface 26 is located on one side of the USB HUB power supply connector 22. The second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210 are arranged side by side on the circuit board main body 21. The input end of the voltage protection circuit 23 is connected to the USB HUB power supply connector 22, and the output end is connected to the circuit board main body 21. The voltage protection circuit 23 steps down the voltage provided by the USB HUB power supply connector 22 and then supplies power to the circuit board main body 21. The input end of the selection output circuit 25 is connected to the selection input IO connector 24, and the output end is respectively connected to the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210. The circuit board 2 further includes an analog switch 211. The analog switch 211 is electrically connected to the circuit board main body 21, and the analog switch 211 is composed of a first analog switch 2111, a second analog switch 2112, and a third analog switch 2113. The first analog switch 2111, the second analog switch 2112, and the third analog switch 2113 are respectively connected to the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210. Among them, the first analog switch 2111 is used to control the on-off and conduction of the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210. The second analog switch 2112 and the third analog switch 2113 respectively control the data reception and data transmission of the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210.

[0032] Specifically, in this embodiment, the first analog switch 2111, the second analog switch 2112, and the third analog switch 2113 have the same model, which is RS2252XTSS16.

[0033] Please refer to again Figure 3 and Figure 4 , the USB HUB power supply connector 22 in the figure mainly provides a stable voltage for the USB hub, so that the USB hub can work stably; the voltage protection circuit 23 plays a role in stabilizing and protecting the current and voltage of the circuit board 2; the select input IO connector 24 drives the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210 respectively in a binary combination manner, and performs a series of different driving methods and transmission interactions for different working processes of products in automated production; the first USB female head interface 26 is the main control communication port, which is used to connect to the main control PC for data interaction, flashing, programming, encryption and other processes. It is the main communication port, achieving the effect of one host controlling multiple devices to work alternately in automated production; the functions of the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210 are the same, all having a transmission speed of 3.0 and strong recognition ability. In the automated production line, different work can be done in specific occasions through binary switching drive, improving efficiency conversion.

[0034] Please refer to again Figure 2 and Figure 3 The lower case 12 is provided with through holes 3 for the USB HUB power supply connector 22, the select input IO connector 24, the first USB female head interface 26, the second USB female head interface 27, the third USB female head interface 28, the fourth USB female head interface 29, and the fifth USB female head interface 210 to pass through.

[0035] Please refer to Figure 5 , the voltage protection circuit 23 in the figure is composed of a power plug-in end P1, a diode D1, and a resistor R1. Among them, the 2nd pin of the power plug-in end P1 is grounded, the 1st pin is connected to the diode D1, one end of the resistor R1 is connected to the diode D1 far away from one end of the power plug-in end P1, and the other end is connected to the circuit board main body 21.

[0036] Please refer to again Figure 5 , the externally connected power supply enters through the power plug-in end P1, and then passes through the diode D1 and the resistor R1, so that the DC voltage "drops in the forward direction" to limit the excessive current, thereby realizing the protection of the current and voltage of the circuit board 2.

[0037] Please refer to Figure 6 and Figure 7, the selection output circuit 25 in the figure is composed of resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, triode Q1, triode Q2, LED1 and LED2. One end of resistor R4 is connected to the IN1 port of the selection input IO connector 24, and the other end is respectively connected to resistor R2 and the base of triode Q1. The emitter of triode Q1 and resistor R2 at the end far from the IN1 port are both connected to the power supply terminal. The collector of triode Q1 is connected to the ground wire through resistor R6. One end of resistor R5 is connected to the IN2 port of the selection input IO connector 24, and the other end is respectively connected to resistor R3 and the base of triode Q2. The emitter of triode Q2 and resistor R3 at the end far from the IN2 port are both connected to the power supply terminal. The collector of triode Q1 is grounded through resistor R7. In this embodiment, both triode Q1 and triode Q2 are PNP triodes, and their models are both SS8550. The model of resistor R1 is 0603WAF0000T5E, and the models of resistor R2, resistor R3, resistor R4 and resistor R5 are all CR0603JA0221G. The models of resistor R6 and resistor R7 are both 0603WAF1002T5E.

[0038] Please refer to again Figure 6 and Figure 7 , resistor R2, resistor R4, resistor R6, triode Q1 and LED1 in the figure form a function switch, and resistor R3, resistor R5, resistor R7, triode Q2 and LED2 form another function switch. Both function switches use binary combination to make drive selection for the USB hub. When a 5V voltage signal is input and triode Q1 and triode Q2 are in the saturation state, LED1 and LED2 indicate successful connection.

[0039] Please refer to again Figures 1 to 7, when the USB hub in the present utility model is working: First, connect the USB HUB power supply connector 22 to the power supply. The power supply is stepped down by the voltage protection circuit 23 to obtain a stable 5V voltage for the circuit board 2 to use. Then, insert the USB extension cable of the main control PC (not shown in the figure) 3.0 into the selected input IO connector 24. After ensuring the insertion is complete, stable information interaction and data transmission can be carried out with the USB hub. After the computer terminal of the main control PC determines the product type, it controls the selected input IO connector 24 to perform binary combination control on the IO. When there is no input control at both the IN1 end and the IN2 end of the selected input IO connector 24, the currents of the triode Q1 and the triode Q2 in the selected output circuit 25 are both in an unsaturated state, and the second USB female head interface 27 can be used. At this time, the second USB female head interface 27 has the USB3.0 transmission speed and reception speed. In the case of twisted pair connection, neither stability nor speed is affected; when there is no input at the IN1 end and there is input at the IN2 end of the selected input IO connector 24, at this time, the triode Q1 in the selected output circuit 25 is in an unsaturated state, and the triode Q2 is in a saturated state, and the third USB female head interface 28 can be used, and it also has the USB3.0 transmission speed and reception speed. In the case of twisted pair connection, neither stability nor speed is affected; when there is input at the IN1 end and no input at the IN2 end of the selected input IO connector 24, at this time, the triode Q1 in the selected output circuit 25 is in a saturated state, and the triode Q2 is in an unsaturated state, and the fourth USB female head interface 29 can be used, and it also has the USB3.0 transmission speed and reception speed. In the case of twisted pair connection, neither stability nor speed is affected; when there is input at both the IN1 end and the IN2 end of the selected input IO connector 24, at this time, the triode Q1 and the triode Q2 in the selected output circuit 25 are in a saturated state, and the fifth USB female head interface 210 can be used, and it also has the USB3.0 transmission speed and reception speed. In the case of twisted pair connection, neither stability nor speed is affected.

[0040] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A multifunctional USB hub, characterized in that: The invention comprises a housing (1) and a circuit board (2), wherein the housing (1) is a cavity structure with a hollow interior, and the housing (1) is composed of an upper housing (11) and a lower housing (12), wherein the upper housing (11) is buckled onto the lower housing (12) and can open or close the lower housing (12), wherein the circuit board (2) is fixedly mounted in the cavity and fixedly connected to a fixed boss (13) in the lower housing (12), and the circuit board (2) comprises a circuit board body (21), and a USB HUB power supply connector (22) arranged on the circuit board body (21), a voltage protection circuit (23), a selection input IO connector (24), a selection output circuit (25), a first USB female connector (26), a second USB female connector (27), a third USB female connector (28), a fourth USB female connector (29) and a fifth USB female connector (210), wherein the USB The HUB power supply connector (22), the selection input IO connector (24), the first USB female interface (26), the second USB female interface (27), the third USB female interface (28), the fourth USB female interface (29) and the fifth USB female interface (210) all penetrate the lower shell (12) from the inside to the outside and extend to the outside of the lower shell (12); the input end of the voltage protection circuit (23) is connected to the USB HUB power supply connector (22), and the output end is connected to the circuit board body (21); the voltage protection circuit (23) reduces the voltage provided by the USB HUB power supply connector (22) and then supplies power to the circuit board body (21); the input end of the selection output circuit (25) is connected to the selection input IO connector (24), and the output end is respectively connected to the second USB female interface (27), the third USB female interface (28), the fourth USB female interface (29) and the fifth USB female interface (210).

2. A multifunctional USB hub according to claim 1, characterized in that: The lower shell (12) is provided with a through hole (3) for a USB HUB power supply connector (22), a selection input IO connector (24), a first USB female connector (26), a second USB female connector (27), a third USB female connector (28), a fourth USB female connector (29) and a fifth USB female connector (210) to pass through.

3. A multifunctional USB hub according to claim 1, characterized in that: A plurality of the fixing convex columns (13) are provided, and the plurality of fixing convex columns (13) are connected end to end to form a "convex" shape, and each fixing convex column (13) is integrally injection-molded with the lower shell (12).

4. The multifunctional USB hub according to claim 1, characterized in that: The circuit board (2) is provided with a positioning hole (212) adapted to the fixing boss (13), and the circuit board (2) further comprises an analog quantity switch (211), the analog quantity switch (211) being electrically connected to the circuit board body (21), and the analog quantity switch (211) being composed of a first analog quantity switch (2111), a second analog quantity switch (2112) and a third analog quantity switch (2113), the first analog quantity switch (2111), the second analog quantity switch (2112) and the third analog quantity switch (2113) being respectively connected to the second USB female interface (27), the third USB female interface (28), and the third analog quantity switch (2113). The fourth USB female interface (29) is connected to the fifth USB female interface (210), wherein the first analog switch (2111) is used to control the disconnection and conduction of the power supply of the second USB female interface (27), the third USB female interface (28), the fourth USB female interface (29) and the fifth USB female interface (210), and the second analog switch (2112) and the third analog switch (2113) respectively control the data reception and data transmission of the second USB female interface (27), the third USB female interface (28), the fourth USB female interface (29) and the fifth USB female interface (210).

5. A multifunctional USB hub according to claim 4, characterized in that: The first analog switch (2111), the second analog switch (2112) and the third analog switch (2113) are of the same model, namely RS2252XTSS16.

6. The multifunctional USB hub according to claim 1, characterized in that: The voltage input by the USB HUB power supply connector (22) is a direct current 5V voltage.

7. The multifunctional USB hub according to claim 1, characterized in that: The voltage protection circuit (23) is composed of a power plug terminal P1, a diode D1 and a resistor R1, wherein pin No. 2 of the power plug terminal P1 is grounded, pin No. 1 is connected to the diode D1, one end of the resistor R1 is connected to the diode D1 away from one end of the power plug terminal P1, and the other end is connected to the circuit board body (21).

8. The multifunctional USB hub according to claim 1, characterized in that: The first USB female interface (26) is located at one side of the USB HUB power supply connector (22), and the first USB female interface (26) is a main control communication port, which is used to connect to the main control PC end.

9. The multifunctional USB hub according to claim 1, characterized in that: The selection output circuit (25) is composed of a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a transistor Q1, a transistor Q2, an LED1 and an LED2, wherein one end of the resistor R4 is connected to the IN1 port of the selection input IO connector (24), and the other end is connected to the resistor R2 and the base of the transistor Q1 respectively, the emitter of the transistor Q1 and the resistor R2 at one end away from the IN1 port are both connected to the power supply end, the collector of the transistor Q1 is connected to the ground wire via the resistor R6, one end of the resistor R5 is connected to the IN2 port of the selection input IO connector (24), and the other end is connected to the resistor R3 and the base of the transistor Q2 respectively, the emitter of the transistor Q2 and the resistor R3 at one end away from the IN2 port are both connected to the power supply end, the collector of the transistor Q1 is grounded via the resistor R7, and both the transistor Q1 and the transistor Q2 are PNP transistors, and their models are both SS8550.

10. The multifunctional USB hub according to claim 1, characterized in that: The second USB female interface (27), the third USB female interface (28), the fourth USB female interface (29) and the fifth USB female interface (210) are arranged side by side on the circuit board body (21).

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