Contact group for improving stability of USB transmission

Abstract

The utility model relates to the technical field of connector, specifically relates to a contact group for improving USB transmission stability, in this application, the high frequency terminal for high frequency signal transmission is located at both sides, and the low frequency terminal for low frequency signal transmission is located between the high frequency terminal, the positive pole of power supply is used for isolating the signal influence of the high frequency terminal on the left side to the low frequency terminal, the negative pole of power supply is used for isolating the signal influence of the high frequency terminal on the right side to the low frequency terminal, and the ground terminal is arranged at both sides of the low frequency terminal, and the isolation space is formed between the ground terminal, the space isolates the signal influence of external signal to the low frequency terminal, the signal transmission stability of the low frequency terminal is improved through the influence of high frequency signal and external signal to the low frequency terminal, and the signal transmission stability of the USB connector is further improved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and specifically to a contact group for improving the stability of USB transmission. Background Technology

[0002] USB (Universal Serial Bus) is an external bus standard used to regulate the connection and communication between computers and external devices. It is an interface technology used in the PC field.

[0003] Chinese Patent Publication No. 201911080371.4 discloses a USB A female connector. This patent discloses a first high-frequency differential signal transmission conductor pair 1, a second high-frequency differential signal transmission conductor pair 2, and a low-frequency signal transmission conductor pair 3. A power transmission conductor 4, a first ground transmission conductor 5, and a second ground transmission conductor 6 are respectively arranged between the first high-frequency differential signal transmission conductor pair 1, the second high-frequency differential signal transmission conductor pair 2, and the low-frequency signal transmission conductor pair 3. High-frequency and low-frequency noise are isolated by the potential difference between the power transmission conductor 4, the first ground transmission conductor 5, and the second ground transmission conductor 6. However, as can be seen from Figure 4 in the specification, only the low-frequency... A ground wire is provided on one side of the signal transmission conductor pair 3 to isolate the signal interference between the first high-frequency differential signal transmission conductor pair 1 and the low-frequency signal transmission conductor pair 3. The power transmission conductor 4, located on the other side of the low-frequency signal transmission conductor pair 3, is used to isolate the signal influence between the second high-frequency differential signal transmission conductor pair 2 and the low-frequency signal transmission conductor pair 3. As can be seen from the above, the main purpose of this paper is to solve the signal interference between high frequency and low frequency. However, in actual use, there are also external signals that affect low frequency, such as mobile phone signals, computer signals, transmitter signals, etc., which will also affect the low-frequency signal transmission. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a contact group for improving USB transmission stability, comprising: a high-frequency terminal, a low-frequency terminal, a ground terminal, a positive power supply terminal, and a negative power supply terminal;

[0005] The high-frequency terminal is provided in two sets, and the two sets of high-frequency terminals are arranged symmetrically.

[0006] The low-frequency terminal is disposed between the two sets of high-frequency terminals;

[0007] The positive terminal of the power supply is located between the low-frequency terminal and the high-frequency terminal on the left side;

[0008] The negative terminal of the power supply is located between the low-frequency terminal and the high-frequency terminal on the right side;

[0009] The grounding terminals are located on both sides of the low-frequency terminal.

[0010] Furthermore, the ground terminal includes a first ground wire and a second ground wire, the first ground wire being located between the high-frequency terminal and the low-frequency terminal on the left, and the second ground wire being located between the high-frequency terminal and the low-frequency terminal on the right.

[0011] Furthermore, both the first ground wire and the second ground wire include a main body, a fixing part, and a connecting part. The fixing part and the connecting part are respectively disposed at both ends of the main body, and the fixing part and the connecting part are integrally formed with the main body.

[0012] Furthermore, the fixing part and the connecting part are connected to the main body part by a bending part.

[0013] Furthermore, the bent portion bends inward.

[0014] Furthermore, the two connecting portions are connected directly below the low-frequency terminal to form a connecting plane.

[0015] Furthermore, the first ground wire and the second ground wire form a shielding space around the low-frequency terminal, and the low-frequency terminal is placed within the shielding space.

[0016] Furthermore, the bent portion is set inward at an angle of 10-30 degrees.

[0017] Furthermore, the bent portion is positioned at an inward angle of 20 degrees.

[0018] Furthermore, the distance between the first ground wire and the low-frequency terminal is the same as the distance between the second ground wire and the low-frequency terminal.

[0019] Beneficial effects: In this application, the high-frequency terminals located on both sides are used for high-frequency signal transmission, while the low-frequency terminals located between the high-frequency terminals are used for low-frequency signal transmission. The positive power supply is used to isolate the signal influence of the high-frequency terminals on the left side from the low-frequency terminals, and the negative power supply is used to isolate the signal influence of the high-frequency terminals on the right side from the low-frequency terminals. The ground terminals are located on both sides of the low-frequency terminals, and an isolation space is formed between the ground terminals. This space isolates the signal influence of external signals on the low-frequency terminals. By isolating the influence of high-frequency signals and external signals on the low-frequency terminals, the signal transmission stability of the low-frequency terminals is improved, further enhancing the signal transmission stability of the USB connector. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the USB receiver in this utility model;

[0021] Figure 2 This is an exploded view of the USB receiver in this utility model;

[0022] Figure 3 This is a schematic diagram of the overall structure of the contact group in this utility model.

[0023] In the attached diagram: 1. High-frequency terminal; 2. Low-frequency terminal; 3. Ground terminal; 4. Positive power supply terminal; 5. Negative power supply terminal; 6. Bend; 7. USB receiver.

[0024] 31. First ground wire; 32. Second ground wire; 33. Main body; 34. Fixing part; 25. Connecting part; 36. Connecting plane; 27. Shielding space. Detailed Implementation

[0025] To facilitate understanding of this utility model by those skilled in the art, the specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] like Figures 1-3 As shown, this utility model provides a contact group to improve the stability of USB transmission, including: a high-frequency terminal 1, a low-frequency terminal 2, a ground terminal 3, a positive power supply terminal 4, and a negative power supply terminal 5;

[0027] Two sets of high-frequency terminals 1 are provided, and the two sets of high-frequency terminals 1 are arranged symmetrically.

[0028] The low-frequency terminal 2 is positioned between the two sets of high-frequency terminals 1;

[0029] The positive power supply terminal 4 is positioned between the low-frequency terminal 2 and the high-frequency terminal 1 on the left.

[0030] The negative terminal 5 of the power supply is located between the low-frequency terminal 2 and the high-frequency terminal 1 on the right side;

[0031] Ground terminal 3 is located on both sides of low frequency terminal 2.

[0032] Specifically, the high-frequency terminals 1 located on both sides are used for high-frequency signal transmission, while the low-frequency terminals 2 located between the high-frequency terminals 1 are used for low-frequency signal transmission. The positive power supply 4 is used to isolate the signal influence of the high-frequency terminals 1 on the left side on the low-frequency terminals 2, and the negative power supply 5 is used to isolate the signal influence of the high-frequency terminals 1 on the right side on the low-frequency terminals 2. The ground terminals 3 are located on both sides of the low-frequency terminals 2, and an isolation space is formed between the ground terminals 3. This space isolates the signal influence of external signals on the low-frequency terminals 2. By isolating the influence of high-frequency signals and external signals on the low-frequency terminals 2, the signal transmission stability of the low-frequency terminals 2 is improved, thereby further improving the signal transmission stability of the USB connector.

[0033] In some embodiments, the ground terminal 3 in this application includes a first ground wire 31 and a second ground wire 32. The first ground wire 31 is located between the high-frequency terminal 1 and the low-frequency terminal 2 on the left side, and the second ground wire 32 is located between the high-frequency terminal 1 and the low-frequency terminal 2 on the right side.

[0034] Specifically, the first ground wire 31 and the second ground wire 32 physically isolate the high-frequency terminal 1 from the low-frequency terminal 2, increasing the distance between the high-frequency terminal 1 and the low-frequency terminal 2 to prevent the high-frequency terminal 1 from affecting the signal between the low-frequency terminal 2.

[0035] On the other hand, when there is a changing electric field in the external space (such as a switching power supply, clock signal, etc.), the first ground wire 31 and the second ground wire 32 set on both sides of the low-frequency terminal 2, as grounded conductors, can attract and guide these electric fields directly into the "ground", instead of letting the electric field couple to the protected low-frequency terminal 2. This is equivalent to building a "Faraday cage" for the low-frequency terminal 2 through the first ground wire 31 and the second ground wire 32, thereby weakening the interference caused by electric field coupling to the low-frequency terminal 2 and improving the signal transmission stability of the low-frequency terminal 2.

[0036] In some embodiments, the first ground wire 31 and the second ground wire 32 in this application each include a main body 33, a fixing part 34 and a connecting part 25. The fixing part 34 and the connecting part 25 are respectively disposed at both ends of the main body 33, and the fixing part 34 and the connecting part 25 are integrally formed with the main body 33.

[0037] Specifically, generally speaking, the length of the high-frequency terminal 1 is longer than that of the low-frequency terminal 2. The main body 33 corresponds to the low-frequency terminal 2. The low-frequency terminal 2 has a receiving part for connecting to an external line and a fixing part 34 located at the rear end of the receiving part. The fixing part 34 is used to fix the low-frequency terminal 2 to the USB shell. The fixing part 34 of the first ground wire 31 and the second ground wire 32 is also used to fix to the USB shell. However, the connecting part 25 is located at the other end of the first ground wire 31 and the second ground wire 32 and continues to extend on the basis of the main body 33, thereby completely isolating the influence of the high-frequency terminal 1 on the low-frequency terminal 2.

[0038] In some embodiments, the fixing part 34 and the connecting part 25 in this embodiment are connected to the main body part 33 by the bending part 6.

[0039] Specifically, both the low-frequency terminal 2 and the high-frequency terminal 1 have a bent portion 6 at their tails. Because the internal low-frequency terminal 2 and high-frequency terminal 1 make hard contact with the external low-frequency terminal 2 and high-frequency terminal 1 during USB connector connection, they are subjected to stress. The bent portion 6 at the tails of the low-frequency terminal 2 and high-frequency terminal 1 prevents them from breaking under this stress. It should be noted that the material of the low-frequency terminal 2 and high-frequency terminal 1 is usually very thin, making them prone to bending. Furthermore, the low-frequency terminal 2 and high-frequency terminal 1 are typically integrally molded with the USB casing using injection molding. Repairing the low-frequency terminal 2 and the high-frequency terminal 1 requires damaging the USB casing. However, usually no one repairs a damaged USB receiver 7, as it is time-consuming, laborious, and not worth repairing. The bending portion 6 in the first ground wire and the second ground wire 32 is also to alleviate the stress on the first ground wire 31 and the second ground wire 32. On the other hand, the fixing portion 34 is provided by the bending portion 6, which allows the fixing portion 34 to fit better against the low-frequency terminal 2 and improve the shielding effect. Since the length of the low-frequency terminal 2 is less than that of the high-frequency terminal 1, the connecting portion 25 extends to the position of the length difference between the low-frequency terminal 2 and the high-frequency terminal 1 through the bending portion 6, further improving the shielding effect.

[0040] Meanwhile, the provision of a first ground wire 31, a second ground wire 32, and a connecting part 25 enables the first ground wire 31 and the second ground wire 32 to absorb more electric field, thereby improving the signal transmission stability of the low-frequency terminal 2.

[0041] In some embodiments, the bend 6 in this application is bent inward.

[0042] Specifically, due to the limited internal space of the USB receiver 7, the first ground wire 31 and the second ground wire 32 are positioned as close as possible to the low-frequency terminal 2 while ensuring the shielding effect as much as possible. The bending part 6 is bent toward the low-frequency terminal 2 in order to better fit the low-frequency terminal 2 and make reasonable use of the space.

[0043] In some embodiments, the two connecting portions 25 in this application are connected directly below the low-frequency terminal 2 to form a connecting plane 36.

[0044] Specifically, the surface area of ​​the connecting plane 36 is much larger than the combined surface area of ​​the two connecting parts 25. This allows the connecting plane 36 to absorb more electric field. As the surface area of ​​the connecting plane 36 increases, more electric field is absorbed by the connecting plane 36, thereby ensuring the signal transmission stability of the low-frequency terminal 2.

[0045] In some embodiments, the first ground wire 31 and the second ground wire 32 in this application form a shielding space 27 around the low-frequency terminal 2, and the low-frequency terminal 2 is placed inside the shielding space 27.

[0046] Specifically, in this embodiment, the shielding space 27 is an elliptical space. Compared with a square space, the elliptical space has smoother edges and corners, making it more difficult for the electric field to penetrate the shield and affect the low-frequency terminal 2.

[0047] In some embodiments, the bent portion 6 in this application is positioned 10-30 degrees inward.

[0048] Specifically, in this embodiment, the bending portion 6 can be set at 10 degrees, 12 degrees, 14 degrees, 16 degrees, 18 degrees, 20 degrees, 22 degrees, 24 degrees, 26 degrees, 28 degrees, and 30 degrees. Specifically, the bending portion 6 is set at 20 degrees inward. This angle is the most reasonable angle. If the angle is too large, the terminal will break due to the application of stress during hard contact. If the angle is too small, it cannot effectively absorb stress, and the hard contact will cause the terminal to tear.

[0049] In some embodiments, the distance between the first ground wire 31 and the low-frequency terminal 2 in this embodiment is the same as the distance between the second ground wire 32 and the low-frequency terminal 2.

[0050] Specifically, the first ground wire 31 and the second ground wire 32 are aligned with the low-frequency terminal 2, providing an electrically balanced and symmetrical environment for the low-frequency terminal 2. When an external noise source (such as a switching power supply or clock signal) generates an electric field, it will preferentially couple to the ground wire closest to the low-frequency terminal 2. If the distances between the first ground wire 31 and the second ground wire 32 and the low-frequency terminal 2 are different (one closer, one farther), the closer ground wire will absorb or shield more of the electric field, while the shielding effect of the farther ground wire will be weakened, exposing the low-frequency terminal 2 to more noise. When the distances between the first ground wire 31 and the second ground wire 32 and the low-frequency terminal 2 are equal, the first ground wire 31 and the second ground wire 32 provide a uniform "shielding barrier" for the low-frequency terminal 2. Any external electric field interference will be absorbed and directed to the "ground" by the first ground wire 31 and the second ground wire 32 on both sides almost simultaneously and with the same intensity, significantly reducing the possibility of noise differentially coupling to the low-frequency terminal 2. This provides a consistent and predictable shielding effect.

[0051] The above embodiments of this utility model do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A contact group for improving USB transmission stability, characterized in that, include: High-frequency terminal (1), low-frequency terminal (2), ground terminal (3), positive power supply (4), and negative power supply (5); The high-frequency terminal (1) is provided in two sets, and the two sets of high-frequency terminals (1) are arranged symmetrically; The low-frequency terminal (2) is disposed between the two sets of high-frequency terminals (1); The positive terminal (4) of the power supply is located between the low-frequency terminal (2) and the high-frequency terminal (1) on the left side; The negative terminal (5) of the power supply is located between the low-frequency terminal (2) and the high-frequency terminal (1) on the right side; The ground terminal (3) is disposed on both sides of the low-frequency terminal (2).

2. The contact group for improving USB transmission stability according to claim 1, characterized in that, The ground terminal (3) includes a first ground wire (31) and a second ground wire (32). The first ground wire (31) is located between the high-frequency terminal (1) and the low-frequency terminal (2) on the left side, and the second ground wire (32) is located between the high-frequency terminal (1) and the low-frequency terminal (2) on the right side.

3. The contact group for improving USB transmission stability according to claim 2, characterized in that, The first ground wire (31) and the second ground wire (32) each include a main body (33), a fixing part (34) and a connecting part (25). The fixing part (34) and the connecting part (25) are respectively disposed at both ends of the main body (33), and the fixing part (34) and the connecting part (25) are integrally formed with the main body (33).

4. The contact group for improving USB transmission stability according to claim 3, characterized in that, The fixing part (34) and the connecting part (25) are connected to the main body part (33) by the bending part (6).

5. The contact group for improving USB transmission stability according to claim 4, characterized in that, The bent portion (6) bends inward.

6. The contact group for improving USB transmission stability according to claim 3, characterized in that, The two connecting parts (25) are connected directly below the low-frequency terminal (2) to form a connecting plane (36).

7. The contact group for improving USB transmission stability according to any one of claims 2-6, characterized in that, The first ground wire (31) and the second ground wire (32) form a shielding space (27) around the low-frequency terminal (2), and the low-frequency terminal (2) is placed in the shielding space (27).

8. The contact group for improving USB transmission stability according to claim 5, characterized in that, The bending part (6) is set inward at an angle of 10-30 degrees.

9. The contact group for improving USB transmission stability according to claim 8, characterized in that, The bending part (6) is set inward at a 20-degree angle.

10. The contact group for improving USB transmission stability according to claim 2, characterized in that, The distance between the first ground wire (31) and the low-frequency terminal (2) is the same as the distance between the second ground wire (32) and the low-frequency terminal (2).

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