TWM673605U - Connection interface compatible with type c universal serial bus hardware specifications - Google Patents

Abstract

This present invention is related to a connection interface that is compatible with the hardware specifications of the Type C Universal Serial Bus, including: a hardware structure of a connection interface that is compatible with the hardware specifications of a Type C Universal Serial Bus; wherein the connection interface includes any one of a male connection interface and a female connection interface that is compatible with the Type C Universal Serial Bus; and 24 metal docking structures, which are symmetrically distributed in the connection interface in the form of two groups of 12 metal docking structures; wherein, these metal docking structures can support two sets of Universal Serial Bus (USB) 2.0 standard signal transmission operations at the same time.

Description

A connection interface compatible with the Type-C universal serial bus hardware specification

This case relates to a Universal Serial Bus (USB) connection interface, specifically a connection interface compatible with the Type C Universal Serial Bus (USB-C) hardware specification.

For modern people, smart electronic products such as computers and mobile phones have become indispensable products in life. In order to support the above smart electronic products, many electronic peripheral devices have been developed, such as mobile hard drives for data backup, wired or wireless chargers for charging, and card readers that can read data storage cards of various storage specifications (such as SD or CF specifications). However, due to the differences between these electronic peripheral devices, These devices are typically independent of each other and unable to transmit or communicate with each other. Even if a host computer (for example, a computer) is used to transmit or communicate with different electronic peripherals, it often requires a variety of signal transmission cables of different specifications to complete the communication. In other words, to meet the diverse needs of modern people, they are surrounded by too many and too complex electronic peripherals and signal transmission cables, causing considerable trouble in their use and daily life.

To meet the diverse application needs of these numerous users and reduce the complexity of using different electronic peripherals, a connection interface that provides flexibility and simplifies the connection between different devices is necessary. This is precisely the technical issue that this project aims to address.

The main purpose of this project is to provide a connection interface that is compatible with the Type-C universal serial bus hardware specifications.

Another object of this invention is to provide an application example in which a connection interface compatible with the hardware specification of the Type-C universal serial bus is applied to a modular peripheral device composed of a host computer and at least one expansion unit, thereby enabling a modular connection between the host computer and the at least one expansion unit.

One preferred embodiment of the present invention relates to a connection interface compatible with the hardware specification of the Type-C universal serial bus, comprising: a connection interface hardware structure compatible with the hardware specification of the Type-C universal serial bus; wherein the connection interface includes either a male connector or a female connector compatible with the Type-C universal serial bus; and 24 metal docking structures symmetrically distributed within the connection interface in two groups of 12 metal docking structures each; wherein the metal docking structures can simultaneously support signal transmission operations compliant with two sets of the Universal Serial Bus (USB) 2.0 specification.

Preferably, the four metal connectors supporting either USB 2.0 standard can be combined with the other five metal connectors to form a nine-metal connector structure supporting signal transmission operations for a single USB 3.0 standard.

Preferably, the metal bonding structures include at least two metal bonding structures that support signal transmission operations according to an integrated circuit ( ^I2C ) specification, or at least four metal bonding structures that support signal transmission operations according to a general-purpose input/output (GPIO) specification, or at least two metal bonding structures that provide a fixed 3.3V power signal transmission operation, or at least four metal bonding structures that provide a fast-charging power signal transmission operation, or at least four metal bonding structures that provide a grounding function.

Preferably, the power fast charging signal transmission operation refers to a power signal transmission operation that can be at least one of 5V, 9V, 15V, 19V, 24V, 40V, or 48V.

Preferably, the connection interface can be combined with a position-limiting docking structure to restrict any two connection interfaces to only one-way docking and prevent bidirectional docking.

Preferably, the position-limiting docking structure includes at least one of a protrusion docking structure and a groove docking structure.

Preferably, the position-limiting docking structure includes at least one of a position-limiting groove and a position-limiting column.

In a preferred embodiment, the connection interface is provided in a modular peripheral device composed of a host computer and at least one expansion unit to provide a modular connection between the host computer and the at least one expansion unit.

Preferably, the modular peripheral device includes at least: a Wi-Fi module, at least one of at least one memory storage unit and a wireless charging circuit, a first USB interface device, a second USB interface device, and a power circuit.

Preferably, the first USB interface device is electrically connected to a four-wire metal docking structure supporting either of the two USB 2.0 standards to support signal transmission operations of the USB 2.0 standard, and/or the four-wire metal docking structure of either USB 2.0 standard can be combined with another five-wire metal docking structure to support signal transmission operations of a single USB 3.0 standard.

Preferably, the first USB interface device has a USB 2.0/USB 3.0 shared port, or has both a USB 2.0 port and a USB 3.0 port.

Preferably, the second USB interface device is electrically connected to the four metal docking structures of the other of the two USB 2.0 standard universal serial buses to support USB 2.0 standard signal transmission operations.

Preferably, the second USB interface device has a USB 2.0 port.

Preferably, the power circuit is electrically connected to two metal docking structures that provide a fixed 3.3 volt power signal transmission operation, and/or electrically connected to four metal docking structures that provide a power fast charging signal transmission operation.

Another preferred embodiment of the present invention relates to a connection interface compatible with the hardware specification of a Type-C universal serial bus, comprising: a connection interface hardware structure compatible with the hardware specification of a Type-C universal serial bus; wherein the connection interface includes either a male connector interface or a female connector interface compatible with the Type-C universal serial bus; and 24 metal docking structures distributed within the connection interface, wherein the metal docking structures are capable of only unidirectional docking and do not provide bidirectional docking; wherein at least four of the metal docking structures support signal transmission operations compliant with the USB 2.0 specification, and at least four support signal transmission operations compliant with another USB 2.0 specification. 2.0 specification, and these four metal docking structures can be combined with five other metal docking structures to form a nine-metal docking structure that supports signal transmission operations of the Universal Serial Bus (USB) 3.0 specification.

Preferably, the metal bonding structures include at least two metal bonding structures that support signal transmission operations according to an integrated circuit ( ^I2C ) specification, or at least four metal bonding structures that support signal transmission operations according to a general-purpose input/output (GPIO) specification, or at least two metal bonding structures that provide a fixed 3.3V power signal transmission operation, or at least four metal bonding structures that provide a fast-charging power signal transmission operation, or at least four metal bonding structures that provide a grounding function.

Preferably, the power fast charging signal transmission operation refers to a power signal transmission operation that can be at least one of 5V, 9V, 15V, 19V, 24V, 40V, or 48V.

A preferred approach is to include four metal joint structures among the metal joint structures that can provide a grounding function.

Preferably, the connection interface can be combined with a position-limiting docking structure to restrict any two connection interfaces to only one-way docking and prevent bidirectional docking.

Preferably, the position-limiting docking structure includes at least one of a protrusion docking structure and a groove docking structure.

Preferably, the position-limiting docking structure includes at least one of a position-limiting groove and a position-limiting column.

In a preferred embodiment, the connection interface is provided in a modular peripheral device composed of a host computer and at least one expansion unit to provide a modular connection between the host computer and the at least one expansion unit.

Another preferred embodiment of the present invention relates to a connection interface compatible with the hardware specification of the Type C universal serial bus, which is applied to a system having at least a first device and a second device, wherein the connection interface comprises at least: a hardware structure of a first connection interface having 24 metal docking structures, which is disposed in the first device; and a hardware structure of a second connection interface having another 24 metal docking structures, which is disposed in the second device, and the hardware structure of the second connection interface is used to perform unidirectional docking with the hardware structure of the first connection interface; wherein the hardware structure of the first connection interface or the hardware structure of the second connection interface is compatible with a Type C universal serial bus. C Universal Serial Bus hardware specifications, and both the 24 metal docking structures and any of the other 24 metal docking structures can simultaneously support two sets of Universal Serial Bus (USB) 2.0 specification signal transmission operations.

Preferably, the hardware structure of the first connection interface or the hardware structure of the second connection interface includes either a male connection interface or a female connection interface compatible with the Type-C universal serial bus.

Preferably, the 24 metal docking structures and any of the other 24 metal docking structures include at least four metal docking structures capable of supporting signal transmission operations compliant with the USB 2.0 specification, another four metal docking structures capable of supporting signal transmission operations compliant with another USB 2.0 specification, and the four metal docking structures can be combined with five other metal docking structures to form nine metal docking structures capable of supporting signal transmission operations compliant with the USB 3.0 specification.

Preferably, the 24 metal bonding structures and any of the other 24 metal bonding structures include at least two metal bonding structures that support signal transmission operations according to an integrated circuit ( ^I2C ) specification, or at least four metal bonding structures that support signal transmission operations according to a general-purpose input/output (GPIO) specification, or at least two metal bonding structures that provide fixed 3.3V power signal transmission operations, or at least four metal bonding structures that provide power fast charging signal transmission operations, or at least four metal bonding structures that provide a grounding function.

Preferably, the power fast charging signal transmission operation refers to a power signal transmission operation that can be at least one of 5V, 9V, 15V, 19V, 24V, 40V, or 48V.

Preferably, either the first connection interface or the second connection interface can be combined with a position-limiting docking structure to restrict the first connection interface and the second connection interface to only one-way docking and prevent bidirectional docking.

Preferably, the position-limiting docking structure includes at least one of a protrusion docking structure and a groove docking structure.

Preferably, the position-limiting docking structure includes at least one of a position-limiting groove and a position-limiting column.

In a preferred embodiment, the first device may be a host computer, the second device may be at least one expansion unit, and the system may be a modular peripheral device formed by modularly connecting the host computer and the at least one expansion unit.

To provide a better understanding of the above and other aspects of this case, the following provides a detailed description with reference to specific embodiments and accompanying drawings.

TC0: Learn about the Type C Universal Serial Bus male connector interface.

TC: This case shows the Type C universal serial bus male connector interface.

A1~A12, B1~B12: Metal butt joint structure

11: Host

111: Main control and interface processing unit

112: Power module

114: Protrusion docking structure

1141: Limiting slot

12: Expansion Unit

121: First USB interface device

122: Second USB interface device

123: Control and GPIO processing unit

124: Power circuit

125: Wireless charging circuit

126: Memory storage unit

127: Groove docking structure

1271: Limiting column

128: Wi-Fi module

21: Host

211: Main control and interface processing unit

212: Power module

213: First memory storage unit

22: First expansion unit

221: First USB interface device

222: Second USB interface device

223: Control and GPIO processing unit

224: Power circuit

225: Wi-Fi module

23: Second expansion unit

231: Control and GPIO processing unit

232: Memory storage unit

233: Wireless charging circuit

P: Downward assembly action

USB2-1, USB2-2: Data signal transmission lines in the Universal Serial Bus (USB) 2.0 specification

PD: Power fast charging signal

SCL: I ² C integrated bus circuit specifications serial clock signal

SDA: I ² C integrated bus circuit specification serial data signal

GPIO1~GPIO4: The first to fourth groups of general-purpose input and output signals

Figure 1 is a conceptual diagram of the male plug connection interface of the Type-C universal serial bus hardware specification.

Figure 2 shows a schematic diagram of a preferred implementation concept for a male plug connection interface compatible with the Type C universal serial bus hardware specification.

Figure 3 is a schematic diagram showing a preferred implementation concept of applying the proposed connection interface, which is compatible with the Type C universal serial bus hardware specification, to a modular peripheral device.

Figures 4A and 4B illustrate the specific assembly and bottom implementation structure of the modular peripheral device shown in Figure 3 of this case, combined with a position-limiting docking structure when utilizing multiple connection interfaces of this case to achieve modular docking.

Figure 5 is a schematic diagram showing a preferred implementation concept for applying the proposed connection interface, which is compatible with the Type-C universal serial bus hardware specification, to another modular peripheral device.

The following detailed description is based on examples. These examples are provided for illustrative purposes only and are not intended to limit the scope of protection sought by this application. Furthermore, the figures in the examples omit unnecessary elements or elements that can be implemented using conventional techniques to clearly illustrate the technical features of this application.

To address the challenges of known technologies, a flexible and simplified interface design was necessary. This design utilizes the USB-C (Type C Universal Serial Bus) hardware specification as the interface between various electronic devices. By redefining some of the transmission signaling, the design not only fully utilizes existing cable hardware specifications, significantly reducing interface hardware development costs, but also meets the modular assembly requirements and application flexibility required for signal transmission between various electronic peripherals.

In other words, the following will first illustrate the signal layout of the Type-C universal serial bus male plug interface hardware specification, to facilitate the subsequent description of the implementation and application examples of the signal layout changes for the connection interface in this case.

Please refer to Figure 1 for the Type-C Universal Serial Bus male connector (TC0) hardware specification for the signal layout and the table below for the relevant information about the signal layout:

As Figure 1 indicates, the USB-C male connector (TC0) hardware specifications show that it has 24 metal connectors (A1-A12, B1-B12), arranged symmetrically across the connector in two groups of 12 each.

Furthermore, since the connection interface TC (as shown in FIG2 ) planned in this case does not need to perform bidirectional docking and only provides unidirectional docking, the existing USB-C docking signal planning of some metal docking structures in FIG1 is idle because it no longer needs to achieve the bidirectional docking function. This case can utilize and modify them so that the idle metal docking structures can be redefined and planned to support another set of USB2.0, integrated bus circuit (Inter-Integrated Circuit, I ² C), 3.3V power, multiple sets of power delivery (PD) signals and general-purpose input and output (GPIO). The newly designed interface can simultaneously provide one USB 3.0, two USB 2.0, I ² C, 3.3V power, multiple power supply fast charging signals (PD), and GPIO.

Specifically, please refer to Figure 2 and the table below, which provide a schematic diagram of a preferred implementation concept for a male plug connector TC compatible with the Type-C universal serial bus hardware specification and a table illustrating the corresponding interconnection signals. The redefined and redesigned metal interconnection structure is underlined in the table for easier reference and understanding:

Of course, the signal planning for the connection of the Type-C universal serial bus receptacle interface hardware specifications can also be modified in the same or similar manner as shown in the embodiment of FIG. 2 of this invention, and will not be further elaborated here.

Furthermore, as can be seen from the aforementioned table and Figure 2, the metal docking structures (A1-A12, B1-B12) include at least four metal docking structures (A1, A4, A6, and A7) that support signal transmission operations compliant with the Universal Serial Bus (USB) 2.0 specification. These metal docking structures (A6 and A7) constitute the data signal transmission line USB2-1 compliant with the USB 2.0 specification.

At the same time, these metal docking structures (A1-A12, B1-B12) also include another four metal docking structures (B6, B7, B9, B12) for supporting signal transmission operations of another USB 2.0 standard. These metal docking structures (B6, B7) constitute another data signal transmission line USB2-2 in the other Universal Serial Bus (USB) 2.0 standard.

Thus, the newly designed connection interface TC in this case supports the signal transmission operation of the USB 2.0 specification through four metal docking structures (A1, A4, A6, and A7), and supports the signal transmission operation of another USB 2.0 specification through another four metal docking structures (B6, B7, B9, and B12). When necessary, two sets of USB 2.0 standard signals can be provided for transmission operation simultaneously.

Furthermore, the aforementioned four metal docking structures (A1, A4, A6, and A7) can be combined with five other metal docking structures (A2, A3, B10, B11, and B1) to form a total of nine metal docking structures that support signal transmission operations compliant with a single Universal Serial Bus (USB) 3.0 specification.

In addition, among these metal docking structures (A1-A12, B1-B12), there are two metal docking structures (A10, A11) that can support signal transmission operations of an integrated circuit ( ^I2C ) specification, and four metal docking structures (B2, B3, B5, A5) that can support signal transmission operations of a general-purpose input and output (GPIO) specification.

Furthermore, the metal bonding structures (A1-A12, B1-B12) include at least two metal bonding structures (A8, B8) that can provide a fixed 3.3V power signal transmission operation, and four metal bonding structures (A4, A9, B4, B9) that can provide a fast power charging signal (PD) transmission operation. Specifically, for the fast power charging signal (PD) transmission operation, the present invention can provide a wider range of voltage operation options through the four metal bonding structures (A4, A9, B9, B4) depending on the actual application conditions. For example, it can provide a power signal transmission operation of at least 5V, 9V, 15V, 19V, 24V, 40V, or 48V.

Of course, among these metal connecting structures (A1-A12, B1-B12), there are four metal connecting structures (A1, A12, B1, B12) that can provide a grounding function.

For a preferred application example of the new connection interface TC proposed in this case, which provides flexibility and simplifies the connection between different devices, please refer to Figure 3, which is a schematic diagram of a preferred implementation concept of applying the proposed connection interface TC, which is compatible with the Type-C universal serial bus hardware specification, to a modular peripheral device.

In Figure 3, the new connection interface TC of this invention is installed in a modular peripheral device composed of a host computer 11 and an expansion unit 12, providing a modular connection between the host computer 11 and the expansion unit 12. In addition to utilizing USB 2.0/USB 3.0 standards for signal transmission between the host computer 11 and the expansion unit 12, signal transmission using the master/slave integrated circuit (I ² C) standard can also be used for some functions within the expansion unit 12.

The host computer 11 includes at least a main control and interface processing unit 111 and a power module 112. The expansion unit 12 includes at least a first USB interface device 121, a second USB interface device 122, a control and GPIO processing unit 123, a power circuit 124, a wireless charging circuit 125, a memory storage unit 126, and a Wi-Fi module 128.

The host computer 11 and the expansion unit 12 each have a connection interface TC. For example, one may have a Type C male connector and the other a Type C female connector, or both may have a Type C female connector and be connected using a transmission cable with Type C male connectors at both ends. This is not a limitation in this case. Of course, each connection interface TC has 24 metal connection structures (A1-A12, B1-B12).

The first USB interface device 121 is electrically connected to four metal docking structures (A1, A4, A6, and A7) supporting one of the two USB 2.0 standards to support signal transmission operations of the USB 2.0 standard. Furthermore, the four metal docking structures (A1, A4, A6, and A7) of the USB 2.0 standard can be combined with five other metal docking structures (A2, A3, B10, B11, and B1) to support signal transmission operations of a single USB 3.0 standard.

Preferably, the first USB interface device 121 has a USB 2.0/USB 3.0 shared port (not shown), or has both a USB 2.0 port (not shown) and a USB 3.0 port (not shown), for connecting to an electronic peripheral device (not shown) that complies with the USB 2.0/USB 3.0 standard.

Furthermore, the second USB interface device 122 is electrically connected to the four metal docking structures (B6, B7, B9, and B12) of the other of the two USB 2.0 standard Universal Serial Buses to support USB 2.0 standard signal transmission operations and facilitate docking with another electronic peripheral device (not shown) also conforming to the USB 2.0 standard.

The second USB interface device 122 has a USB 2.0 port (not shown).

As can be seen from the above description, the expansion unit 12 not only provides some peripheral application functions (for example, the wireless charging circuit 125 can provide wireless charging, or the memory storage unit 126 can provide data storage) and facilitates modular assembly with the host 11, but also allows for expansion connections with other electronic peripheral devices (not shown) through, for example, the first USB interface device 121 or the second USB interface device 122. Of course, the expansion unit 12 also allows for full or partial signal control by the user via the Wi-Fi module 128.

Furthermore, the power circuit 124 included in the expansion unit 12 is electrically connected to two metal docking structures (A8, B8) that provide a fixed 3.3V power signal transmission operation, and/or to four metal docking structures (A4, A9, B4, B9) that provide a power fast charging signal PD transmission operation.

Specifically, this invention addresses the power signal transmission operation of the power fast charging signal PD specification. Depending on the actual application of the expansion unit 12 or other electronic peripheral devices (not shown), the four metal docking structures (A4, A9, B9, B4) can provide a wider range of voltage operating options. For example, power signal transmission operation can be provided for at least one of 5V, 9V, 15V, 19V, 24V, 40V, or 48V.

Furthermore, between the main control and interface processing unit 111 in the host 11 and the control and GPIO processing unit 123 in the expansion unit 12, two metal connection structures (A10, A11) supporting signal transmission operations of an integrated bus circuit ( ^I2C ) specification and four metal connection structures (B2, B3, B5, B6) supporting signal transmission operations of a general purpose input and output (GPIO) specification can be arranged. A5); Specifically, this case plans multiple metal docking structures (B2, B3, B5, A5) to support the signal transmission operation of the general purpose input and output (GPIO) specification. One of the purposes is to use these GPIO signals as a basis for determining whether any expansion unit to be assembled into the modular peripheral device belongs to the same series of products when the newly designed connection interface TC of this case is applied to the modular peripheral device.

Of course, in addition to controlling the signals of the expansion unit 12, the host computer 11 can also be connected to a computer (not shown) to allow the computer to control the entire or partial signals.

To further illustrate the modular assembly of the host computer 11 and the expansion unit 12 in Figure 3 , and given that the connection interface TC in this case does not provide bidirectional docking functionality, some design considerations for a docking prevention mechanism are necessary. A preferred approach is shown in Figures 4A and 4B , which illustrate the specific assembly and bottom implementation structure of the modular peripheral device in Figure 3 , combined with a position-limiting docking structure, when using the two connection interfaces TC in this case to achieve modular docking.

In Figures 4A and 4B, the main unit 11 and the expansion unit 12 are modularly assembled in an up/down stacking manner. That is, the bottom of the expansion unit 12 is placed on top of the main unit 11 in a downward assembly motion P.

A position-limiting docking structure (e.g., a protruding docking structure 114) is provided around the connection interface TC in the main unit 11. This structure mates with another position-limiting docking structure (e.g., a recessed docking structure 127) provided around the connection interface TC in the expansion unit 12. This restricts any two connection interfaces TC to one-way docking, preventing bidirectional docking. This achieves a foolproof docking design.

Furthermore, to prevent instability during docking between the connection interface TC in the main unit 11 and the connection interface TC in the expansion unit 12, the present invention further provides a retaining groove 1141 on the protruding docking structure 114 and a corresponding retaining post 1271 on the recessed docking structure 127. The retaining groove 1141 and retaining post 1271 effectively enhance the stability of the docking between the main unit 11 and the expansion unit 12 through the retaining engagement between the retaining groove 1141 and the retaining post 1271.

Please refer to Figure 5, which is a schematic diagram of a preferred implementation concept of applying the connection interface TC proposed in this case, which is compatible with the Type C universal serial bus hardware specification, to another modular peripheral device.

The basic operating principle of Figure 5 is similar to that of Figure 3. Figure 5 primarily increases the number of expansion units and changes the specific placement of some peripheral device functions. This illustrates how the new connection interface can be used for modular docking with various peripheral devices, demonstrating its flexibility and convenience.

Specifically, as shown in Figure 5, the new connection interface TC of this invention is installed in another modular peripheral device composed of a host computer 21, a first expansion unit 22, and a second expansion unit 23, respectively, to provide modular connections between the host computer 21 and the first expansion unit 22 and the second expansion unit 23. In addition to utilizing USB 2.0/USB 3.0 standards for signal transmission between the host computer 21 and the first expansion unit 22 and the second expansion unit 23, signal transmission using the master/slave integrated circuit (I ² C) standard can also be used for signal transmission between some functions within the expansion unit 12.

The host computer 21 includes at least a main control and interface processing unit 211, a power module 212, and a first memory storage unit 213. The first expansion unit 22 includes at least a first USB interface device 221, a second USB interface device 222, a control and GPIO processing unit 223, a power circuit 224, and a Wi-Fi module 225. Furthermore, the second expansion unit 23 includes at least a control and GPIO processing unit 231, a second memory storage unit 232, and a wireless charging circuit 233.

Of course, the connection interface TC between the host computer 21 and either the first expansion unit 22 or the second expansion unit 23 is equipped with 24 metal docking structures (A1-A12, B1-B12).

In summary, this design leverages the hardware specifications of the USB-C (Type C Universal Serial Bus) interface as a connection structure between various electronic devices. It also redefines some of the transmission signal content. This not only fully utilizes existing cable hardware specifications, significantly saving hardware development costs for the connection interface, but also meets the modular assembly requirements and application flexibility required for signal transmission between various electronic peripherals. Therefore, this design is a product of great industrial value.

Although this invention has been disclosed above through embodiments, they are not intended to limit this invention. Those skilled in the art will readily appreciate that various modifications and enhancements can be made to this invention without departing from the spirit and scope of this invention. Therefore, the scope of protection for this invention shall be determined by the scope of the patent application attached hereto.

TC: This case shows the Type C universal serial bus male connector (plug) interface.

A1~A12, B1~B12: Metal butt joint structure

USB2-1, USB2-2: Data signal transmission lines in the Universal Serial Bus (USB) 2.0 specification

PD: Power fast charging signal

SCL: I ² C integrated bus circuit specifications serial clock signal

SDA: I ² C integrated bus circuit specification serial data signal

GPIO1~GPIO4: The first to fourth groups of general-purpose input and output signals

Claims (30)

A connection interface compatible with the hardware specifications of the Type C universal serial bus includes: a connection interface hardware structure compatible with the hardware specifications of a Type C universal serial bus; wherein the connection interface includes either a male connection interface or a female connection interface compatible with the Type C universal serial bus; and 24 metal docking structures symmetrically distributed in the connection interface in the form of two groups of 12 metal docking structures each; wherein the metal docking structures can simultaneously support signal transmission operations of two sets of universal serial bus (USB) 2.0 specifications. The connection interface as described in claim 1, wherein the four metal docking structures used to support either of the two USB 2.0 specifications can be combined with the other five metal docking structures to form a nine-metal docking structure that can support signal transmission operations of a single USB 3.0 specification. The connection interface as described in claim 1, wherein the metal docking structures include at least two metal docking structures that can support signal transmission operations of an integrated circuit (I²C) specification, or at least four metal docking structures that can support signal transmission operations of a general purpose input and output (GPIO) specification, or at least two metal docking structures that can provide a fixed 3.3 volt power signal transmission operation, or at least four metal docking structures that can provide a fast power charging signal transmission operation, or at least four metal docking structures that can provide a grounding function. The connection interface as described in claim 3, wherein the power fast charging signal transmission operation refers to a power signal transmission operation that can be at least any one of 5 volts, 9 volts, 15 volts, 19 volts, 24 volts, 40 volts or 48 volts. As described in claim 1, the connection interface can be combined with a limit docking structure to limit any two connection interfaces to only one-way docking and not two-way docking. A connection interface as described in claim 5, wherein the position-limiting docking structure includes at least one of a protrusion docking structure and a groove docking structure. The connection interface as described in claim 5, wherein the limiting docking structure includes at least one of a limiting groove and a limiting column. The connection interface as described in claim 1, wherein the connection interface is used to be set in a modular peripheral device composed of a host and at least one expansion unit to provide a modular connection between the host and the at least one expansion unit. The connection interface as described in claim 8, wherein the modular peripheral device includes at least: a Wi-Fi module, at least one of at least one memory storage unit and a wireless charging circuit, a first USB interface device, a second USB interface device and a power circuit. A connection interface as described in claim 9, wherein the first USB interface device is electrically connected to four metal docking structures supporting either of the two USB 2.0 specifications to support signal transmission operations of the USB 2.0 specifications, and/or the four metal docking structures of either of the USB 2.0 specifications can be further combined with five other metal docking structures to support signal transmission operations of a single USB 3.0 specification. The connection interface as described in claim 10, wherein the first USB interface device has a USB2.0/USB3.0 shared connection port, or has both a USB2.0 connection port and a USB3.0 connection port. The connection interface as described in claim 9, wherein the second USB interface device is electrically connected to the four metal docking structures of the other universal serial bus in the two sets of USB2.0 specifications to support the signal transmission operation of the USB2.0 specification. The connection interface as described in claim 12, wherein the second USB interface device has a USB 2.0 connection port. A connection interface as described in claim 9, wherein the power circuit is electrically connected to two metal docking structures that provide a fixed 3.3 volt power signal transmission operation, and/or electrically connected to four metal docking structures that provide a power fast charging signal transmission operation. A connection interface compatible with the hardware specification of a Type C universal serial bus, comprising: a hardware structure of a connection interface, compatible with the hardware specification of a Type C universal serial bus; wherein the connection interface includes any one of a male connection interface and a female connection interface compatible with the Type C universal serial bus; and 24 metal docking structures distributed in the connection interface, and the metal docking structures are only capable of unidirectional docking and do not provide bidirectional docking; wherein, among the metal docking structures, there are at least four metal docking structures that can support signal transmission operations of a universal serial bus (USB) 2.0 specification, and are used to support another USB The present invention also provides another four metal docking structures for signal transmission operations of the 2.0 specification, and the four metal docking structures can be combined with other five metal docking structures to form a nine-metal docking structure that can support signal transmission operations of a Universal Serial Bus (USB) 3.0 specification. The connection interface as described in claim 15, wherein among the metal docking structures, there are at least two metal docking structures that can support signal transmission operations of an integrated circuit (I²C) specification, or at least four metal docking structures that can support signal transmission operations of a general purpose input and output (GPIO) specification, or at least two metal docking structures that can provide a fixed 3.3 volt power signal transmission operation, or at least four metal docking structures that can provide a fast power charging signal transmission operation, or at least four metal docking structures that can provide a grounding function. The connection interface as described in claim 16, wherein the power fast charging signal transmission operation refers to a power signal transmission operation that can be at least any one of 5 volts, 9 volts, 15 volts, 19 volts, 24 volts, 40 volts or 48 volts. As described in claim 15, the connection interface can be combined with a limit docking structure to limit any two connection interfaces to only one-way docking and not two-way docking. A connection interface as described in claim 18, wherein the limiting docking structure includes at least one of a protrusion docking structure and a groove docking structure. A connection interface as described in claim 18, wherein the limiting docking structure includes at least one of a limiting groove and a limiting column. A connection interface as described in claim 15, wherein the connection interface is used to be set in a modular peripheral device composed of a host and at least one expansion unit to provide a modular connection between the host and the at least one expansion unit. A connection interface compatible with the hardware specification of the Type C universal serial bus is applied to a system having at least a first device and a second device, the connection interface comprising at least: a hardware structure of a first connection interface having 24 metal docking structures, disposed in the first device; and a hardware structure of a second connection interface having another 24 metal docking structures, disposed in the second device, and the hardware structure of the second connection interface is used to perform unidirectional docking with the hardware structure of the first connection interface; wherein the hardware structure of the first connection interface or the hardware structure of the second connection interface are both compatible with a Type C universal serial bus. C Universal Serial Bus hardware specifications, and in the 24 metal docking structures and in any of the other 24 metal docking structures, two sets of Universal Serial Bus (USB) 2.0 specification signal transmission operations can be supported at the same time. The connection interface as described in claim 22, wherein the hardware structure of the first connection interface or the hardware structure of the second connection interface includes either a male connection interface or a female connection interface compatible with the Type C universal serial bus. The connection interface as described in claim 22, wherein among the 24 metal docking structures and any one of the other 24 metal docking structures, there are at least 4 metal docking structures that can support signal transmission operations of a Universal Serial Bus (USB) 2.0 specification, another 4 metal docking structures for supporting signal transmission operations of another USB 2.0 specification, and the 4 metal docking structures can be combined with other 5 metal docking structures to form 9 metal docking structures that can support signal transmission operations of a Universal Serial Bus (USB) 3.0 specification. The connection interface as described in claim 22, wherein among the 24 metal docking structures and any one of the other 24 metal docking structures, there are at least two metal docking structures that can support a signal transmission operation of an integrated circuit (I²C) specification, or at least four metal docking structures that can support a signal transmission operation of a general purpose input and output (GPIO) specification, or at least two metal docking structures that can provide a fixed 3.3 volt power signal transmission operation, or at least four metal docking structures that can provide a fast power charging signal transmission operation, or at least four metal docking structures that can provide a grounding function. The connection interface as described in claim 25, wherein the power fast charging signal transmission operation refers to a power signal transmission operation that can be at least any one of 5 volts, 9 volts, 15 volts, 19 volts, 24 volts, 40 volts or 48 volts. As described in claim 22, the connection interface, either the first connection interface or the second connection interface, can be combined with a position-limiting docking structure to limit the first connection interface and the second connection interface to only one-way docking and not two-way docking. A connection interface as described in claim 27, wherein the limiting docking structure includes at least one of a protrusion docking structure and a groove docking structure. A connection interface as described in claim 27, wherein the limiting docking structure includes at least one of a limiting groove and a limiting column. The connection interface as described in claim 22, wherein the first device may be a host, the second device may be at least one expansion unit, and the system may be a modular peripheral device composed of a modular connection between the host and the at least one expansion unit.