WO2021259156A1

WO2021259156A1 - Data line

Info

Publication number: WO2021259156A1
Application number: PCT/CN2021/100840
Authority: WO
Inventors: 伦文波
Original assignee: 维沃移动通信有限公司
Priority date: 2020-06-23
Filing date: 2021-06-18
Publication date: 2021-12-30
Also published as: CN111740289A

Abstract

Disclosed by the present application is a data line, comprising: a first interface end, which comprises a housing; and a second interface end, which is connected to the first interface end by means of a cable. The cable comprises a shielding layer and a plurality of wires, the shielding layer is wrapped on the exterior of the plurality of wires, the shielding layer is connected to the housing by means of a capacitor, and the shielding layer is grounded.

Description

A data line

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010582832.4 filed in China on June 23, 2020, the entire content of which is incorporated herein by reference.

Technical field

This application relates to the field of communication technology, and in particular to a data cable.

Background technique

If current terminal communication products such as mobile phones and tablets are to be sold on the market, the terminal products themselves and corresponding accessories must meet the corresponding electromagnetic interference laws and regulations. Radiated emission is a high-frequency signal, which is transmitted in the form of electromagnetic waves at about 150Mhz. However, due to the fault in the shell and shielding layer of the Type C port of the data line, the characteristic impedance is discontinuous, resulting in radiated emission (RE). Excessive circumstances.

Summary of the invention

The embodiment of the present application provides a data line to solve the problem of poor reliability of the data line in the prior art.

In the first aspect, an embodiment of the present application provides a data cable, including:

A first interface end, where the first interface end includes a housing;

A second interface end, where the second interface end is connected to the first interface end through a cable;

The cable includes: a shielding layer and a plurality of wires, the shielding layer is wrapped outside the plurality of wires;

Wherein, the shielding layer is connected to the housing through a capacitor, and the shielding layer is grounded.

In this way, in the above solution of the present application, the shielding layer is connected to the housing through a capacitor, and the shielding layer is grounded, so that the shielding layer and the housing are short-circuited together through the capacitor, and the housing is grounded through the capacitor. , To ensure the continuity of the reference ground, use the filter function of the capacitor to filter out the electromagnetic waves of the RE, avoid the discontinuity of the reference ground due to the fault between the shielding layer and the housing, thereby solving the problem of excessive radiation emission and poor reliability problem.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

Figure 1 shows one of the schematic diagrams of the data line;

Figure 2 shows the second structural diagram of the data line;

FIG. 3 shows a schematic diagram of the structure of a data line according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of the connection between the housing and the shielding layer of the embodiment of the present application;

FIG. 5 shows a schematic diagram of the positions of the first capacitor and the second capacitor in an embodiment of the present application;

FIG. 6 shows one of the schematic diagrams of the resonance frequency of the embodiment of the present application;

FIG. 7 shows the second schematic diagram of the resonance frequency of the embodiment of the present application;

FIG. 8 shows a schematic diagram of the internal structure of a data line according to an embodiment of the present application.

Description of reference signs: 1. first interface terminal, 2. second interface terminal, 3, cable, 4, first capacitor, 5, second capacitor, 11, housing, 12, circuit board, 31, shielding layer, 111. The first connecting portion, 112, the second connecting portion.

detailed description

Hereinafter, exemplary embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided for a more thorough understanding of the application and to fully convey the scope of the application to those skilled in the art.

As shown in Figure 1, a data cable structure is provided. The A and B ends of the data cable are connected by multiple wires. The A end can be used to connect to a computer and other equipment, and the B end can be a Type C end, which can be used to connect to a mobile phone. Multiple wires are wound with a shielding layer 31, and the shielding layer 31 is wound and connected with the ground wire. The shell of the Type C port does not contact the shielding layer, that is, the shell is suspended.

The structure shown in Figure 1, because RE is a high-frequency signal, it is transmitted in the form of electromagnetic waves around 150Mhz, and there is a fault between the Type C shell and the shielding layer, so the reference ground is not continuous, which may cause characteristic impedance Discontinuity, leading to radiation.

As shown in FIG. 2, another data line structure is provided. The shielding layer 31 is directly DC shorted to the shell of the B end. The other structure is the same as that of FIG. 1, and will not be repeated here.

As shown in the structure shown in Figure 2, the Type C port shell and the shielding layer 31 are short-circuited by DC, which can solve the problem of radiation emission. However, because the shell is directly grounded, it may cause reliability such as port burn due to the micro short circuit between the shell and the power cord. problem.

As shown in FIG. 3, an embodiment of the present application provides a data cable, including:

A first interface end 1, the first interface end 1 includes a housing 11;

A second interface end 2, the second interface end 2 is connected to the first interface end 1 through a cable 3;

The cable 3 includes: a shielding layer 31 and a plurality of wires, the shielding layer 31 is wrapped outside the plurality of wires; wherein the shielding layer 31 is connected to the housing 11 through a capacitor, and the shielding layer 31 is grounded.

The first interface terminal 1 may be a Type C terminal of a data cable, which may be used to connect to a mobile terminal, and the second interface terminal 2 may be used to connect to a terminal such as a computer to realize data transmission between terminals. The shell 11 of the first interface terminal 1 is electrically conductive, and the shell 11 may be a metal shell of the Type C terminal. The first interface terminal 1 and the second interface terminal 2 are connected by a cable 3, and the cable 3 is used to transmit data and includes a shielding layer 31 and a plurality of wires wrapped inside the shielding layer 31, Such as ground wire, power cord, etc.

As shown in FIG. 3, the shielding layer 31 is connected to the housing 11 through a capacitor, so that the shielding layer 31 and the housing 11 are short-circuited together through a capacitor, and the electromagnetic wave of RE can be filtered out by the filtering function of the capacitor; The shielding layer 31 is grounded, so that the housing 11 is grounded through the capacitor, ensuring the continuity of the reference ground and avoiding the discontinuity of the reference ground due to the fault between the shielding layer 31 and the housing 11. Solve the problems of excessive radiation emission and poor reliability.

It should be noted that there may be one or more capacitors. FIG. 3 takes the capacitor including two capacitors as an example.

Optionally, as shown in FIG. 3, the capacitor may include: at least one of the first capacitor 4 and the second capacitor 5. For example, when the capacitor includes the first capacitor 4, the shielding layer 31 is connected to the housing 11 through the first capacitor 4, and the capacitance value of the first capacitor may be 4.7 nF; When the capacitor includes the second capacitor 5, the shielding layer 31 is connected to the housing 11 through the second capacitor 5, and the capacitance value of the second capacitor 5 may be 1 nF; when the capacitor includes the first capacitor In the case of a capacitor 4 and the second capacitor 5, the shielding layer 31 is connected to the housing 11 through the first capacitor 4 and the second capacitor 5, respectively.

Taking the capacitor including the second capacitor 5 and the capacitance value of the second capacitor 5 as 1 nF as an example, the filter frequency corresponding to the 1 nF capacitor is about 150 MHz. Among them, the length of the data line is 1M, which reaches 1/2 wavelength for the frequency of 150Mhz, which meets the optimal radiation condition of the antenna. According to λ=c/f, λ is the wavelength, c is the electromagnetic wave speed, and f is the frequency, which can be calculated The 150Mhz frequency corresponds to a wavelength of 2M, and 1/2 wavelength is the optimal radiation condition of the antenna, which is 1M. Therefore, for a 1M data line, the 150Mhz frequency is easier to radiate. In the embodiment of the present application, the capacitance value of the second capacitor 5 can be set to 1 nF. In this way, the frequency of 150 MHz can be passed smoothly and the RE frequency can be filtered.

Taking the capacitor including the first capacitor 4 and the capacitance value of the first capacitor 4 as 4.7 nF as an example, the filter frequency corresponding to the 4.7 nF capacitor is about 75 MHz. Among them, the length of the data line is 1M, and for the frequency of 75Mhz, it reaches 1/4 wavelength, which satisfies the antenna radiation condition. According to λ=c/f, λ is the wavelength, c is the electromagnetic wave speed, and f is the frequency. The 75Mhz can be calculated The wavelength corresponding to the frequency is 4M, and the antenna can also achieve better radiation effects at 1/4 wavelength, so for 1M data lines, the frequency of 75Mhz is also easy to radiate. In the embodiment of the present application, the capacitance value of the first capacitor 4 may be set to 4.7 nF. In this way, the 75 MHz frequency can be passed smoothly and the RE frequency can be filtered.

Optionally. As shown in FIG. 4, the first interface terminal 1 further includes: a circuit board 12, the circuit board 12 is at least partially disposed inside the housing 11; the capacitor is disposed on the circuit board 12.

In the case where the capacitor includes the first capacitor 4 and the second capacitor 5, the first capacitor 4 and the second capacitor 5 are both arranged on the circuit board 12. The circuit board 12 may be a printed circuit board. The housing 11 is connected to a capacitor provided on the circuit board 12, and is connected to the shielding layer 31 through the capacitor. Since the shielding layer 31 is grounded, the housing 11 is grounded through the capacitor to realize the The shell is short-circuited with GND through a capacitor, and the shell and the shielding layer are short-connected through a capacitor to ensure the continuity of the reference ground, which can greatly reduce the RE radiation, which not only solves the problem of excessive radiation emission, but also solves the problem of port burn And other reliability issues.

Specifically, the housing 11 is provided with a connecting portion, and the connecting portion is connected to the circuit board 12; the number of the connecting portion is equal to the number of the capacitor.

In this embodiment, the connecting portion is used to realize the electrical connection between the housing 11 and the circuit board 12. The housing 11 may be a metal housing. The connecting portion may be a connecting structure extending from the housing 11, such as a hook structure. It should be noted that the number of the connection portions is equal to the number of the capacitors, that is, each connection portion is connected to a capacitor correspondingly, so that the housing 11 is connected to the capacitor through the connection portion.

Optionally, as shown in FIG. 4, when the capacitor includes a first capacitor 4 and a second capacitor 5, the connecting portion includes a first connecting portion 111 and a second connecting portion 112; the first capacitor 4 and the second capacitor 5 are both arranged on the circuit board 12.

The first connecting portion 111 is connected to the first end of the first capacitor 4, the second end of the first capacitor 4 is connected to the shielding layer 31, and the second end of the first capacitor is grounded;

The second connecting portion 112 is connected to the first end of the second capacitor 5, the second end of the second capacitor 5 is connected to the shielding layer 31, and the second end of the second capacitor is grounded.

One end of the first connecting portion 111 and one end of the second connecting portion 112 may be soldered on the circuit board 12, and grounded through the first capacitor 4 and the second capacitor 5 on the circuit board 12. The first connecting portion 111 is connected to the first end of the first capacitor 4, and the second end of the first capacitor 4 is connected to the shielding layer 31, wherein the second end of the first capacitor 4 Grounded. The second connecting portion 112 is grounded to the first end of the second capacitor 5, and the second end of the second capacitor 5 is connected to the shielding layer 31, wherein the second end of the second capacitor 5 is Grounded. That is, the housing 11 and the shielding layer 31 are short-connected together through a capacitor, and the housing 11 and GND are short-connected through a capacitor.

In this embodiment, the housing uses the first connection portion 111 and the second connection portion 112 to be short-circuited with GND through a capacitor, and the housing and the shielding layer are short-circuited through a capacitor to ensure the continuity of the reference ground and enable RE The radiation is greatly reduced, which not only solves the problem of excessive radiation emission, but also solves the reliability problems such as port burning.

Optionally, an accommodating cavity is formed inside the housing 11, and the first connecting portion 111 and the second connecting portion 112 extend toward the accommodating cavity to be connected to the circuit board 12. The first connecting portion 111 and the second connecting portion 112 may be an integral structure with the housing 11 or may be separately provided on the housing 11. The first connecting portion 111 and the second connecting portion 112 can be arranged at any position inside the housing 11, for example: the first connecting portion 111 and the second connecting portion 112 are arranged on the housing 11 Two inner surfaces opposite to each other inside, or the first connecting portion 111 and the second connecting portion 112 are provided on two adjacent inner surfaces of the housing 11. The location of the first connecting portion 111 and the second connecting portion 112 can be set according to electrical connection requirements with other components.

The plurality of wires includes a ground wire; the ground wire is electrically connected to the circuit board 12. The end of the shielding layer 31 connected to the first interface terminal 1 is welded to the circuit board 12 and is directly grounded. In this way, by making the connection parts on the housing 11 and GND respectively short-circuited through a capacitor, the first connection part 111 and the second connection part 112 are respectively connected to the shielding layer 31 through a capacitor short-circuiting method, which solves both RE The problem of excessive radiation emission has been solved, and multiple wires such as burning ports can also include: a power line, a first data line, and a second data line; the power line, the ground line, the first data line, and the The second data line is wrapped inside the shielding layer 31. As shown in Figure 5, the data lines are: power lines, first data lines, second data lines, and ground lines. A shield layer 31 is wound on the outer layer of the above four sets of lines, and the shield layer 31 is connected to GND. , The housing 11 and the shielding layer 31 are connected through a capacitor.

Take the capacitor including the first capacitor 4 and the second capacitor 5, and the capacitance value of the first capacitor 4 is 4.7 nF, and the capacitance value of the second capacitor 5 is 1 nF as an example, as shown in FIG. 5 As shown, the housing 11 and GND are connected by a combination of 4.7nF+1nF capacitors, where 4.7nF corresponds to a frequency of about 75Mhz, and a 1nF capacitor corresponds to a frequency of about 150Mhz, so that the frequency of about 150Mhz and 75Mhz of RE can pass smoothly, thereby realizing the protection of RE. Filtering. Wherein, the capacitance value of the first capacitor 4 is 4.7nF, and the resonant frequency when the filter frequency is about 75Mhz is shown in Fig. 6; the capacitance value of the second capacitor 5 is 1nF, and the resonant frequency is about 150Mhz. The frequency is shown in Figure 7.

The data line may be as shown in FIG. 8, taking the capacitor including the first capacitor 4 and the second capacitor 5 as an example. Wherein, the first capacitor 4 and the second capacitor 5 are arranged on the circuit board 12, and the first connecting portion 111 and the second connecting portion 112 extending from the housing 11 are welded to the On the circuit board 12; a plurality of wires in the cable 3 are connected to the circuit board 12. The plurality of wires may include: a power line, a first data line, a second data line, and a ground line. The circuit A plurality of conductive terminals are provided on the board 12, and the plurality of conductive terminals correspond to the plurality of conductive wires in a one-to-one correspondence; for example, the conductive terminals correspond to the power line, the first data line, the second data line, and The grounding line is connected, the shielding layer 31 is wrapped around the power line, the first data line, the second data line, and the grounding line, and the shielding layer 31 is connected to the grounding line to achieve grounding. The housing 11 is shorted to the shielding layer 31 in the cable 3 through the first capacitor 4 and the second capacitor 5 on the circuit board 12, and the housing 11 is grounded through the first capacitor 4 and the second capacitor 5, The shielding layer 31 is welded on the circuit board 12 and is directly grounded.

In the embodiment of the present application, the housing uses the connecting portion and GND to be short-circuited through a capacitor, and the housing and the shielding layer are short-circuited through a capacitor to ensure the continuity of the reference ground, which can greatly reduce the RE radiation, which solves The problem of excessive radiation emission is solved, and reliability problems such as port burnt are solved.

The data cable in the embodiments of this application can be applied to electronic equipment, and the electronic equipment can be a mobile phone. Those skilled in the art can understand that in addition to the mobile phone as a terminal device, it can also be applied to other terminal devices that require data transmission, such as a tablet. Computers, e-book readers, moving Picture Experts Group Audio Layer III (MP3) players, moving Picture Experts Group Audio Layer III (MP3) players, moving Picture Experts Group Audio Layer IV (MP4) players , Laptop portable computers, vehicle-mounted computers, desktop computers, set-top boxes, smart TVs, wearable devices, etc., are all within the protection scope of the embodiments of the present application.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

Although the optional embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including optional embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. Or there is any such actual relationship or sequence between operations. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes those elements that are not explicitly listed. Other elements listed, or also include elements inherent to this process, method, article, or terminal device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or terminal device that includes the element.

The above are optional implementations of this application. It should be pointed out that for those of ordinary skill in the art, a number of improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications are also Within the scope of protection of this application.

Claims

A data cable, including:

A first interface end, where the first interface end includes a housing;

A second interface end, where the second interface end is connected to the first interface end through a cable;

The cable includes: a shielding layer and a plurality of wires, the shielding layer is wrapped outside the plurality of wires;

Wherein, the shielding layer is connected to the housing through a capacitor, and the shielding layer is grounded.
The data line according to claim 1, wherein the capacitance includes at least one of a first capacitance and a second capacitance.
The data line according to claim 2, wherein, in the case where the capacitor includes the first capacitor and the second capacitor, the shielding layer is connected to the shielding layer through the first capacitor and the second capacitor, respectively The housing is connected.
3. The data line according to claim 2, wherein the capacitance value of the first capacitor is 4.7 nF, and the capacitance value of the second capacitor is 1 nF.
The data cable according to claim 1, wherein the first interface terminal further comprises: a circuit board, and the circuit board is at least partially disposed inside the housing;

The capacitor is arranged on the circuit board.
The data cable according to claim 5, wherein the housing is provided with a connecting portion, and the connecting portion is connected with the circuit board;

The number of the connection parts is equal to the number of the capacitors.
7. The data line according to claim 6, wherein, in the case where the capacitor includes a first capacitor and a second capacitor, the connecting portion includes a first connecting portion and a second connecting portion;

The first connecting portion is connected to the first end of the first capacitor, the second end of the first capacitor is connected to the shielding layer, and the second end of the first capacitor is grounded;

The second connecting portion is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the shielding layer, and the second end of the second capacitor is grounded.
The data line according to claim 5, wherein the plurality of wires comprise ground wires;

The ground wire is electrically connected to the circuit board.
8. The data line according to claim 8, wherein the plurality of wires further comprise: a power line, a first data line, and a second data line;

The power line, the ground line, the first data line, and the second data line are wrapped inside the shielding layer.
5. The data line according to claim 5, wherein the circuit board is further provided with a plurality of conductive terminals, and the plurality of conductive terminals correspond to the plurality of wires in a one-to-one correspondence.