CN207250890U - A kind of USB data line - Google Patents

Abstract

The utility model provides a USB data cable, which comprises a wire core, a shielding layer wrapped outside the wire core, an insulating layer arranged outside the shielding layer, and a first plug and a second plug arranged at both ends of the wire core. plug, wherein the second plug is a USB standard plug, and the shielding layer includes a first shielding layer and a second shielding layer disconnected from each other, and the first shielding layer is arranged between the wire core and the first shielding layer. One end of the plug connection, the second shielding layer is located between the first shielding layer and the second plug, and the first shielding layer is connected to the first ground terminal provided in the first plug . In this way, by splitting the shielding layer into a first shielding layer and a second shielding layer disconnected from each other, the anti-interference signal capability of the USB data line can be effectively improved.

Description

A USB data cable

technical field

The utility model relates to the technical field of communication, in particular to a USB data line.

Background technique

USB (Universal Serial Bus, Universal Serial Bus) is the most widely used external bus standard in the computer field. It is used to standardize the connection and communication between computers and external devices. The USB interface supports plug-and-play and hot-swappable functions of devices. .

At present, in order to solve the radiation interference generated by the USB data line during data transmission, generally, the shielding layer of the USB data line is connected to the ground terminal of the USB data line. However, connecting the shielding layer of the USB data cable to the ground terminal of the USB data cable will cause external interference signals to enter the ground terminal, thereby affecting the transmission performance of the USB data cable. It can be seen that the existing USB data cable has the problem of poor anti-interference signal capability.

Utility model content

The embodiment of the utility model provides a USB data line to solve the problem of poor anti-interference signal capability of the USB data line.

The embodiment of the utility model provides a USB data cable, which includes a core, a shielding layer wrapped outside the core, an insulating layer disposed outside the shielding layer, and first plugs disposed at both ends of the core and a second plug, wherein the second plug is a USB standard plug, the shielding layer includes a first shielding layer and a second shielding layer disconnected from each other, and the first shielding layer is arranged between the wire core and the One end connected to the first plug, the second shielding layer is located between the first shielding layer and the second plug, and the first shielding layer is connected to the first ground in the first plug Wire terminal connection.

In this way, in the embodiment of the utility model, it includes a wire core, a shielding layer wrapped outside the wire core, an insulating layer arranged outside the shielding layer, and a first plug and a second plug arranged at both ends of the wire core. , wherein, the second plug is a USB standard plug, the shielding layer includes a first shielding layer and a second shielding layer disconnected from each other, and the first shielding layer is arranged on the wire core and the first plug One end of the connection, the second shielding layer is located between the first shielding layer and the second plug, and the first shielding layer is connected to the first ground terminal provided in the first plug. In this way, by splitting the shielding layer into a first shielding layer and a second shielding layer disconnected from each other, the anti-interference signal capability of the USB data line can be effectively improved.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the utility model. Obviously, the accompanying drawings in the following description are only some of the utility models. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is one of the structural representations of the USB data line provided by the embodiment of the utility model;

Fig. 2 is the second structural diagram of the USB data line provided by the embodiment of the utility model;

Fig. 3 is the third schematic diagram of the structure of the USB data cable provided by the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1-3, Fig. 1 is one of the schematic diagrams of the structure of the USB data line provided by the embodiment of the utility model; Fig. 2 is the second schematic diagram of the structure of the USB data line provided by the embodiment of the utility model; Fig. 3 is a schematic diagram of the structure of the USB data cable provided by the embodiment of the utility model The third schematic diagram of the structure of the USB data line provided in the embodiment.

As shown in Figures 1-3, the embodiment of the present invention provides a USB data cable 100, including a core 11, a shielding layer 12 wrapped outside the core 11, an insulating layer 15 outside the shielding layer 12, and a wire The first plug 13 and the second plug 14 at the two ends of the core 11, wherein the second plug 14 is a USB standard plug; the shielding layer 12 includes a first shielding layer 121 and a second shielding layer 122 disconnected from each other, and the first shielding layer 121 The second shielding layer 122 is located between the first shielding layer 121 and the second plug 14, and the first shielding layer 121 is connected to the first shielding layer 121 provided in the first plug 13. The ground terminal 1321 is connected.

In the USB data cable 100 provided by the embodiment of the present invention, the first plug 13 is generally used for plugging into a USB socket of a mobile terminal, and the second plug 14 is generally used as a USB standard plug for connecting with an electronic device such as a computer other than a mobile terminal. The USB socket of the device is plugged in, so that according to the characteristics of the plug-and-play and hot-swappable functions of the USB data cable 100, the mobile terminal and the computer can use the USB data cable 100 for data transmission. Wherein, the first plug 13 includes a first shielding shell 131 and a first terminal group 132 disposed in the first shielding shell 131, and the first terminal group 132 includes a first ground terminal 1321, a first power terminal 1322 and a data signal Terminals; the second plug 14 includes a second shielding case 141 and a second terminal group 142 disposed in the second shielding case 141, and the second terminal group 142 includes a second ground terminal 1421, a second power terminal 1422 and a data signal terminals.

It should be noted that the mobile terminal mentioned in the embodiment of the present utility model can be a mobile phone, a personal digital assistant (Personal Digital Assistant, PDA), an e-book reader, an MP3 (moving picture expert compression standard audio level 3, Moving Picture Experts Group Audio Layer III) player, MP4 (Moving Picture Experts Group Audio Layer IV) player, wearable device, etc. Wherein, the second plug 14 can also be plugged into a USB socket of a charging device, for example, can be plugged into a USB socket of a charger.

In the embodiment of the present invention, the first terminal group 132 and the second terminal group 142 are connected through the wire core 11, and the wire core 11 is wrapped with a shielding layer 12, wherein the shielding layer 12 includes a first shielding layer 121 and a shielding layer 121 which are disconnected from each other. The second shielding layer 122 and the first shielding layer 121 are connected to the first ground terminal 1321 disposed in the first plug 13 . In this way, by connecting the first shielding layer 121 to the first ground terminal 1321 provided in the first plug 13, the impedance continuity of the USB data line 100 at the end of the first plug 13 can be ensured, so as to reduce the impact caused by impedance discontinuity. Radiation interference; and by splitting the shielding layer 12 into a first shielding layer 121 and a second shielding layer 122 disconnected from each other, the anti-interference signal capability of the USB data line 100 can be improved, and the transmission performance of the USB data line 100 can be improved.

Optionally, the length of the first shielding layer 121 is shorter than the length of the second shielding layer 122 .

In this embodiment, by setting the length of the first shielding layer 121 to be shorter than the length of the second shielding layer 122 , the anti-interference signal capability of the USB data cable 100 can be improved. It should be noted that, in order to further improve the anti-interference signal capability of the USB data cable 100, the ratio range of the length of the first shielding layer 121 to the length of the first plug 13 can be set between 1.5 and 2, wherein the first The ratio of the length of the shielding layer 121 to the length of the first plug 13 is preferably 1.8.

Optionally, the shielding layer 12 further includes a third shielding layer 123, the third shielding layer 123 is arranged outside the first shielding layer 121, and the end of the third shielding layer 123 away from the first plug 13 is connected to the second shielding layer 122. One end away from the second plug 14 is connected.

In this embodiment, by adding a third shielding layer 123 outside the first shielding layer 121, and the end of the third shielding layer 123 away from the first plug 13 is connected to the end of the second shielding layer 122 away from the second plug 14, In this way, the anti-jamming signal capability of the USB data line 100 can be further improved.

Optionally, the USB data cable 100 also includes a connecting wire, the two ends of the connecting wire are respectively connected to the first shielding layer and the first ground terminal, and the impedance of the first unit length of the connecting wire is greater than that of each conducting loop of the USB data cable 100. The second unit length impedance of the part.

Specifically, in this embodiment, the USB data cable 100 also includes a connecting wire, which is used to connect the first shielding layer 121 and the first ground terminal 1321; The first ground terminal 1321 and the first power terminal 1322 of the mobile terminal, the ground terminal and the power terminal in the USB socket of the mobile terminal, wherein the USB socket of the mobile terminal is a USB socket for plugging into the first plug 13 . Obtain the unit length impedance of the first ground terminal 1321 and the first power terminal 1322 in the first plug 13, the ground terminal and the power terminal in the USB socket of the mobile terminal, and define the unit length impedance with the largest unit length as the second unit Length impedance; by setting the first unit length impedance of the connecting line to the second unit length impedance of the island, it can effectively avoid that when the USB data line 100 is short-circuited during operation, the first burning part is the connecting line, not the mobile terminal , effectively improving the safety of the charging process.

It should be noted that the ratio of the first unit length impedance to the second unit length impedance may range from 1.2 to 1.5, wherein the ratio of the first unit length impedance to the second unit length impedance is preferably 1.25.

Optionally, the second shielding layer 122 is connected to the second ground terminal 1421 provided in the second plug 14 .

In this embodiment, by connecting the second shielding layer 122 to the second ground terminal 1421 provided in the second plug 14, the impedance continuity of the USB data line 100 at the end of the second plug 14 can be improved, and the impedance discontinuity band can be reduced. Radiation interference from coming, improve the transmission performance of the USB data line.

Optionally, the first shielding shell 131 of the first plug 13 is grounded or not grounded.

The first shielding shell 131 of the first plug 13 of the USB data cable 100 provided by the embodiment of the present invention can be connected with the first ground wire terminal 1321 to realize the grounding of the first shielding shell 131; by grounding the first shielding shell 131, it can The impedance continuity of the USB data line 100 at the end of the first plug 13 is further improved. It should be noted that by setting the first shielding shell 131 of the first plug 13 to be ungrounded, the possibility of USB burnout can be effectively reduced. The impedance continuity at the end of a plug 13 will be slightly worse.

Optionally, the second shielding shell 141 of the second plug 14 is grounded or not grounded.

The second shielding shell 141 of the second plug 14 of the USB data cable 100 provided by the embodiment of the present invention can be connected to the second ground terminal 1421 to realize the grounding of the second shielding shell 141; by grounding the second shielding shell 141, it can The impedance continuity of the USB data cable 100 at the end of the second plug 14 is further improved. It should be noted that by setting the second shielding shell 141 of the second plug 14 as not grounded, the possibility of USB burning can be effectively reduced. The impedance continuity at the end of the two plugs 14 will be slightly worse.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (9)

1. a kind of USB data line, including core, the shielded layer being wrapped in outside the core, the insulation outside the shielded layer Layer and the first plug and the second plug arranged on the core both ends, wherein, second plug is USB standard plug, it is special Sign is that the shielded layer includes the first screen layer and secondary shielding layer mutually disconnected, and the first screen layer is arranged on described One end that core is connected with first plug, the secondary shielding layer be located at the first screen layer and second plug it Between, and the first screen layer is connected with the first ground wire terminal in first plug.

2. USB data line according to claim 1, it is characterised in that the length of the first screen layer is less than described the The length of two shielded layers.

3. USB data line according to claim 1, it is characterised in that the shielded layer further includes the 3rd shielded layer, described 3rd shielded layer be arranged on the first screen layer outside, and on the 3rd shielded layer away from first plug one end with it is described One end away from second plug connects in secondary shielding layer.

4. USB data line according to any one of claim 1 to 3, it is characterised in that the USB data line further includes Connecting line, the both ends of the connecting line connect the first screen layer and first ground wire terminal respectively, the connecting line First unit length impedance is more than the second unit length impedance of each component in the conducting circuit of the USB data line.

5. USB data line according to claim 4, it is characterised in that the first unit length impedance and described second The ratio range of unit length impedance is 1.2~1.5.

6. USB data line according to any one of claim 1 to 3, it is characterised in that the secondary shielding layer is with being arranged on The second ground wire terminal connection in second plug.

7. USB data line according to any one of claim 1 to 3, it is characterised in that the length of the first screen layer Ratio range with the length of first plug is 1.5~2.

8. USB data line according to any one of claim 1 to 3, it is characterised in that the first screen of first plug Cover shell ground connection or earth-free.

9. USB data line according to any one of claim 1 to 3, it is characterised in that the second screen of second plug Cover shell ground connection or earth-free.